China Shenzhen Perfect Precision Product Co., Ltd. company news

Precision parts processing is not possible to complete all the processing contents of all surfaces in one process, and the whole processing process of precision parts processing can be divided into the following stages. (1) Roughing stage. Cut off most of the machining allowance of each processing surface, and processing of precision benchmarks, the main consideration is to increase productivity as much as possible.   (2) Semi-finishing stage. Cut off the defects that may arise after rough machining, and prepare for the finishing of the surface, requiring a certain machining accuracy and ensuring the appropriate finishing allowance, while completing the machining of the secondary surface.   (3) Finishing stage. In this stage using a large cutting speed, small feed and depth of cut, remove the finishing margin left by the previous process, so that the surface of the part to meet the technical requirements of the drawing. (4) finishing stage. Mainly used to reduce the surface roughness value or strengthen the processed surface, mainly for surface roughness requirements are very high (ra ≤ 0.32 μm) surface processing.   (5) Ultra-precision machining stage. Machining accuracy in 0.1-0.01 μm, surface roughness value ra ≤ 0.001 μm processing stage. The main processing methods are: precision cutting, fine mirror grinding, precision grinding and polishing, etc.

What are the advantages of precision hardware machining?   1、Fine hardware axis CNC machining with high precision and stable processing quality;   2, can be multi-coordinate linkage, can process the shape of chaotic parts;   3, fine hardware CNC machining parts change, generally only need to change the CNC program, can save production preparation time;   4, the machine itself is highly accurate, rigid, can choose a favorable amount of processing, high production rate (generally 3 to 5 times the general machine tool);   5, the high degree of machine automation, to reduce labor intensity; CNC fine machining using short cutting tools is the main feature of fine hardware parts. Short tools will significantly reduce tool deviation, and then obtain outstanding surface quality, avoid rework, cut the use of welding rod, and shorten the processing time of EDM.   When considering five-axis machining, it is necessary to consider that the policy of using five-axis machining tooling is to finish the entire workpiece with the shortest possible cutting tool, which also includes reducing the programming, clamping and machining time but can get more perfect surface quality.

1 CNC blanking operation standard 1.1 General regulations on the thickness of plates by numerical control blanking (1) Ordinary Q235 plates are generally 1mm, 1.2mm, 1.5mm and 2mm thick. (If there are large batches of special parts, the material thickness can be extended to 3mm, but the mold with corresponding specifications needs to be opened) (2) Due to the size limit of the worktable of TruPunch1000 equipment, the overall dimension of the NC blanking plate must be less than 1100mm (W) * 2450mm (L) (3) When formulating the production process flow, the general rules for plates are as follows: iron plates and aluminum plates that meet the above conditions should be digitally punched as much as possible, and stainless steel plates should not be digitally punched even if they meet the above requirements (due to the molding characteristics of stainless steel, the requirements for molds are very high). 1.2 General provisions of NC blanking on workpiece profile (1) The shape shall not have an arc greater than R5, and the open angle shall be 45 ° and 90 °; (2) The process that must be completed by CNC punching: shutter, rolling rib, punching rib, rolling rib, punching convex tapping hole. (Corresponding molds are generally required) 1.3 General provisions for the contour of workpieces that cannot be NC blanking （1） Φ Round hole, hexagonal hole and special shaped hole below 15 (2) Waist hole less than 5mm. 1.4 Notes for drawing of digital punch NC blanking has a certain impact on the front and back of the plate, which determines the aesthetics of the product. If the drawing conversion is not good, there will be burrs on the front, which will seriously affect the appearance and extend the grinding time. Digital blanking requires that the drawing is the front of the part, to avoid burrs on the front. If there are negative marks, they can be ignored. 2 Operation standard of laser cutting Laser cutting, no need to add additional mold, high processing accuracy. However, the energy consumption is large and the unit labor cost is high. In order to reasonably use the laser cutting machine and improve its service life, the following operation standards are established: 2.1 Cutting capacity (1) Iron plate thickness ≤ 10mm (if it is necessary to cut 12mm-16mm plates, try cutting to determine) (2) Thickness of stainless steel plate ≤ 6mm (if it is necessary to cut 8mm to 12mm plates, try cutting to determine) (3) The thickness of aluminum plate to be cut shall be ≤ 8mm (if it is necessary to cut 10mm to 16mm plates, it shall be determined by trial cutting) (4) Boundary dimension of cutting plate ≤ 2000mm * 4000mm (5) Requirements for cutting aperture:one 2.2 Some points for attention during laser cutting (1) Whether to use laser cutting depends on the economic value of different customers' products. For products with high economic value, more attention should be paid to laser cutting, otherwise less attention should be paid. (2) Consider whether laser cutting is applied according to the shape characteristics and quantity of the expanded drawing. Products with simple appearance shall not be cut by laser as far as possible; For products with large batch and single variety, laser cutting is not required. (3) For workpieces with complex shapes, laser cutting is considered. (4) For the parts that must be combined with laser and digital punch, the safety distance between the clamp and the punch shall be considered (the safety distance is 100mm), and the distance from the part edge to the hole edge shall be less than the safety distance, so as to ensure that the distance from the part edge to the hole edge is more than 100mm. Programmers need to consider the allowance, and pay attention to cutting after several strokes. twenty-two 2.3 Requirements for unfolding drawing for laser cutting (1) The laser mark is on the front of the drawing. (2) The tread plate must be placed on the reverse side. 2.4 Special process of laser cutting 2.4.1 Knock out hole It is convenient for customers to knock down easily, and the other surfaces are not deformed (unless the customer has specific requirements). The knock down hole is reserved for connection of 2mm, which cannot be too large; The number of reserved connection points shall be determined according to the size of knockout holes; 2.4.2 Laser marking line In order to facilitate bending and welding positioning by bending workers, manual scribing by workers is reduced and improved. For product accuracy and production efficiency, technicians should strengthen the use of laser marking. The following specifications are formulated for reference on what conditions and how to add stamps. (1) Laser marking of welding nails and drilling and tapping: the welding nails must be positioned with a circle and a cross line. The length of the cross line is 3mm * 3mm, and the circle size is the outer diameter of the boss at the bottom of the welding nails; thirty-three (2) Counterbore: the contour of the counterbore shall be marked with a laser marking line, which is convenient for the operator to process in place at one time; (3) Drilling: the hole diameter smaller than the plate thickness shall be positioned with cross lines, and the length of laser line marking line shall be 3mm * 3mm; (4) Bending line laser positioning line: it is determined according to the throat depth of the bending machine. When the bending size is larger than the throat depth or the bending sideline is in a deformed state and it is difficult to lean against the stop, it is considered to add a laser marking line. The length of the laser marking line is generally 20~50mm, which is convenient for the bending operator to identify; Under special circumstances, consider slotting when the reverse side needs to be bent, and the laser slotting incision is generally 0.5-2mm long; (5) Rolling circle achieved by bending method: it is required to mark the line from the starting point to the end point of the rolling circle, with a length of 10-20mm, and the middle part is evenly marked every 8-10mm, except for those with a special mold or being rolled by the rolling machine (R85 arc is pressed out by a special mold, but the starting point needs to be marked); (6) The side line is very small or irregular: when the stop cannot be used for measurement, the laser marking line shall be engraved; (7) Perforation positioning: when the front side needs to be marked and the reverse side still needs to be positioned, perforation positioning is required at this time; (8) Positioning of welding parts: the arc and special-shaped parts that are difficult to measure shall be positioned by laser marking during welding.

There are certain technical difficulties in machining trapezoidal threads on CNC lathes, especially in high-speed cutting. It is not easy to observe and control during machining, and the safety and reliability are also poor. This requires correct tool geometry and processing technology. An efficient and feasible processing method is introduced. Whether on an ordinary lathe or on a CNC lathe, there is always a great technical difficulty in processing trapezoidal threads for students in secondary and higher vocational schools, especially in the high-speed turning of trapezoidal threads on a CNC lathe. Most books and textbooks do not introduce special topics. It is difficult for students to master their fine calculation and reasonable processing technology. The author will focus on the high-speed turning method of trapezoidal thread according to the examination questions of senior workers in Hunan Province in recent years and in combination with his own experience and experience. 1、 Selection of processing methods As shown in Figure 1, when machining trapezoidal threads on the CNC lathe, the three jaw chuck adopts the method of one clamp and one top. For the convenience of tool setting and programming, the program origin is set at the center point of the right end face of the workpiece. In addition, a tool setting template is also made to facilitate the accuracy of the Z direction when changing tools in rough and fine turning. It should be pointed out that because of the high-speed machining of trapezoidal threads, cemented carbide tools are selected. When turning trapezoidal thread at high speed, due to the excessive thread pitch, in order to prevent "knife pricking" and "blade breakage", it is required that the cutting force should not be too large when machining trapezoidal thread, and the tool should not cut on three sides at the same time. Through years of practice, the author has proved that the straight cutting method or straight grooving method can not be used for processing with thread cutting commands G32 and G92 on the economic NC lathe. Even though the method of using G92 combined with the left and right swing of subprogram introduced in many magazines in recent years is not the best method for layered cutting. Although this method theoretically can reduce the force during cutting, it ignores that most of our commonly used lathes are economic NC lathes, However, the control system of economical CNC lathe is semi closed loop, so that the servo system can not keep up with the numerical requirements of the CNC system when swinging left and right, thus changing the machining pitch. Considering the comprehensive programming and processing, combined with practical experience, I think it is a better, safe, reliable and easy method to use the thread cutting compound cycle command G76 to process. 2、 Introduction to G76 instruction G76 instruction is oblique cutting. Because of single side edge machining, the tool load is small, chip removal is easy, and the cutting depth is decreasing. General large pitch thread processing. 1. G76 command's feed route and feed distribution. (Figure 2) Group diagram: schematic diagram of trapezoidal thread processing parameters Feed rate per time=h/√ n-1 × √ ¢, where h is the total height of the thread, n is the number of feedings, ¢ is the first feedrate=△ d, is the second feedrate=1, and the third and more feedrates=X-1 2. Format: G76 P（m）（r）（a） Q（⊿dmin） R（d） G76 X（U） Z（W） R（i） P（k） Q（⊿d ） F(L) Including: M - number of finishing repetitions, which can be 1-99 times. R - chamfer amount at the end of thread (oblique tool retraction), 00-99 units, taking 01, it is 0.11 × Lead. A - Angle of thread tip (thread profile angle). 80, 60, 55, 30, 29 and 0 degrees can be selected. △ dmin - minimum back cut during cutting, radius value, μ m. D - finishing allowance, radius value, mm. I - Radius difference of thread part, radius value, μ m. K - thread depth, h=0 65 × Pitch (P) calculation, microns. △ d - first cutting depth, radius value, μ m. L - Thread lead, micrometer. 3、 Selection of tool geometry According to the conditions of high-speed turning trapezoidal thread, the helix angle is calculated first, so that the geometric angle of the tool can be grinded correctly. The helix angle is a=[P/(d)]=arctan [5/(3.14 × 25.5)]=3.82, so it is appropriate to select 6-8 degrees for the left rear corner and 2 degrees for the right rear corner; In order to facilitate chip removal, the tool is not easy to be damaged. The front angle is 6-8 degrees, making the tool sharper and conducive to chip breaking. It is particularly pointed out that I have used two tools for rough and fine turning. As rough machining is easy to damage and wear the turning tool, I grind the sharp corner edge of the rough turning tool into an arc shape, which can strengthen the strength of the tool tip. Even if the rough machining amount is too large, there is a certain safety factor, while the finish machining is completely in accordance with the thread shape. Attention should be paid to the accuracy of zero point when setting the rough and finish turning tools in Z direction. The geometric shapes of rough and finish turning tools are as follows: 4、 Preparation of procedures. This article only describes the programming of trapezoidal thread, as follows: %0003; N10 G90 G95; N20 M3 S350 T0505; N30 G0 X35. Z-10.; N40 G76 P020030 Q20 R0.02 G76 X22.3 Z-94. P2750 Q329 F5. N50 G0 X120. Z200.; N60 M5; N70 M30; 5、 Precautions for processing with thread compound cutting cycle G76. When machining trapezoidal thread with CNC lathe, due to the change of its transmission chain, in principle, its speed should be able to ensure that when the spindle rotates for one cycle, the tool will shift a lead along the direction of the main feed shaft, which should not be limited, but will be affected by the following aspects: 1. The screw pitch/lead value of the command in the thread processing program section is equivalent to the feed speed expressed in the feed rate per revolution. If the spindle speed of the machine tool is selected too high, the converted feed speed must greatly exceed the maximum feed rate allowed by the machine tool parameters. At this time, the machine tool will process according to the "limit screw pitch" (limit screw pitch=maximum feed rate/speed). 2. The tool will be constrained by the frequency rise/fall of the servo drive system and the interpolation speed of the NC device throughout its displacement. The pitch of some threads may not meet the requirements due to the "lead" and "lag" caused by the main feed motion due to the reason that the frequency rise/fall characteristic cannot meet the processing requirements; The thread turning must be realized by the synchronous operation function of the spindle, that is, the spindle pulse generator encoder is required for thread turning. When the spindle speed is too high, the positioning pulse sent by the encoder (that is, a reference pulse signal sent out when the spindle rotates for one cycle) may cause "overshoot", especially when the quality of the encoder is unstable, which will cause the thread of the workpiece to be disorderly buckled. Therefore, when turning trapezoidal thread, the spindle speed shall be selected according to the following principles: 1. Under the condition of ensuring production efficiency and normal cutting, the maximum processing speed should be obtained according to the calculation formula of "limit pitch", and the lower spindle speed should be selected; 2. When the lead in length and cut out length in the thread processing program section are small, relatively low spindle speed is selected; 3. When the allowable working speed specified by the encoder exceeds the maximum spindle speed specified by the machine tool, a higher spindle speed can be selected as far as possible; 4. In general, the spindle speed during thread turning shall be determined according to the calculation formula specified in the machine tool or NC system manual. It should also be noted that: 1. As the spindle speed may change and the correct thread pitch may not be cut, do not use the constant surface cutting speed control command G96 during thread cutting. 2. During thread cutting, the feed rate multiplier is invalid (fixed at 100%), and the speed is fixed at 100%. 3. Chamfer or rounding cannot be specified in the previous segment of the thread cutting segment. 4. Generally, due to the hysteresis of the servo system and other reasons, incorrect leads will be generated at the starting and ending points of thread cutting. Therefore, the starting and ending points of the thread should be longer than the specified thread length.

In the precision mechanical parts processing before, must pay attention to the density of the material, if the density is too large, equivalent to the hardness is also very large, and the hardness if more than the hardness of the lathe turning tool, it is impossible to process, not only will damage the parts, but also cause danger, such as turning tool flying out of the crash injury. So, what are the requirements of precision mechanical parts processing material?   For precision machining materials are divided into two categories, metal materials and non-metallic materials. For metal materials, the hardness of stainless steel is the largest, followed by cast iron, followed by copper, and finally aluminum. The processing of ceramics, plastics, etc. is the processing of non-metallic materials. Stainless steel materials used in the processing of precision mechanical parts   1. First of all, the requirements of the material hardness, for some occasions, the higher the hardness of the material is the better, just limited to the hardness requirements of the processed machine parts, the processed material can not be too hard, if it is harder than the machine parts can not be processed.   2. Secondly, the material soft and hard moderate, at least one grade lower than the hardness of the machine, but also depends on the role of the processed device is to do what with the machine parts reasonable selection of materials.   In short, precision machining of the material requirements or some, not what material is suitable for processing, such as too soft or too hard material, the former is not necessary for processing, and the latter is not processed. Therefore, in general, for mechanical processing, the material material should be lower than the hardness of the machine tool, so that it can be processed. Not what materials can be precision machining, some materials are too hard, more than the hardness of the processing machine parts, it is possible to crash the machine parts, so these materials are not suitable for precision machining, unless the machine parts made of special materials, or laser cutting.

With the expansion of the display area of the full screen mobile phone, the distance between the right angle of the display area and the rounded corner of the mobile phone edge also gets closer, which is easy to cause damage. Therefore, the special-shaped cutting technology is particularly important under the full screen. And special-shaped cutting also makes CNC technology play a more important role. As a professional CNC R&D, production and sales manufacturer, Jiujiu Jinggong has a number of CNC research patents and is committed to carving CAD/CAM technology. It has achieved fruitful results in precision carving machine design and carving process technology, realizing the process of industrialization of CNC technology. Wang Shanning, the director of Jiujiu Seiko, as the title winner of the second quarter "full screen" conference, also made a wonderful sharing at the conference. Wang Shanning said that the traditional LCD screen cutting is generally realized by laser or cutter wheel, and CNC technology is only used as an auxiliary tool. However, in the era of special-shaped screen cutting, due to the high requirements of screen strength and thickness, as well as the fitting of double-layer LCD screen and other factors, CNC will play a greater role in the special-shaped cutting of full screen. The cutting of special-shaped screen can be divided into the cutting of C angle, L angle, R angle, U-shaped groove and other different positions. Among them, 2C angle (single layer), 2C+2R (double layer), 2C+L (double layer) and 2C+2R+U (double layer) are the four main combined cutting methods at present. For CNC, the cutting at these positions needs to be improved in many aspects. For example, for the improvement of the fixture, it is necessary to make the corner directly on the fixture to facilitate positioning; Make the vacuum hole smaller to prevent glass deformation due to excessive suction; In addition, vacuum absorption points shall be designed for processing parts to prevent insufficient vacuum from causing glass shake during processing; Finally, the processing part should be avoided. Wang Shanning said that CNC has obvious advantages in irregular cutting, such as high grinding accuracy, machining accuracy ≤ 0.015mm, and edge collapse ≤ 0.03mm; High strength, the maximum bearing pressure is 110Mpa; In terms of cost, CNC also has an advantage. In the same efficiency of cutting/grinding equipment, CNC procurement cost has an overwhelming advantage; The degree of automation is high. In addition, according to different processing accuracy and speed requirements, CNC can choose single axis machine, double axis machine, full-automatic production machine and other processing models. Wang Shanning is not shy about the difficulties of CNC grinding. Wang Shanning said that the first difficulty lies in the brittleness, ultra-thin and high-precision characteristics of the overall screen, which determines that the difficulty of CNC grinding lies in the control of edge collapse. In this regard, Wang Shanning also provided corresponding solutions. First, the precision of the grinding head. The precision of the lens of the grinding head installed on the spindle is required to jump within 0.005mm. The smaller it is, the higher the precision is; The second is the accuracy of the spindle. The vibration of the spindle at high speed is required to be within 0.5m/s. The smaller the value, the higher the accuracy; Third, when the machine tool is running, the vibration is required to be within 6.5 m/s. The smaller the value, the higher the accuracy; The fourth is to maintain high speed, low feed and low cutting amount during processing. The second difficulty lies in the edge collapse control and efficiency of U groove cutting and grinding. Wang Shanning thinks that the solution is that the diameter of the grinding head should be less than 30% of the R angle of the U-shaped groove, and the walking angle speed should be 30% lower than the linear speed. Wang Shanning finally concluded that the cutting of CNC as a special-shaped screen is far from reaching a mature stage, and is still changing and excessive. As far as the industry is concerned, the single axis machine will transition to the double axis machine in the future, and the double axis machine will transition to the automatic production line. Most importantly, the combination mode of CNC+laser will become an important trend in the industry development.

Hexagon nut is one of our common nuts. It is used together with bolts and screws to connect and fasten the machine parts. It has internal threads and is used together with screws to transmit movement or power. Among them, Type 1 hexagon nuts are the most widely used, and Grade C nuts are used on machines, equipment or structures with rough surfaces and low precision requirements; Class A and B nuts are used on machines, equipment or structures with smooth surfaces and high requirements for accuracy. The thickness m of type 2 hexagon nut is relatively thick, and it is often used in situations where assembly and disassembly are often required. The thickness m of the hexagon thin nut is relatively thin, which is mainly used in the occasion where the surface space of the connected parts is limited. A nut is a nut, which is screwed together with a bolt or a screw to play a fastening role. It is an element that must be used in all production and manufacturing machinery. How should a hexagon nut be processed? Here is a brief introduction to the processing steps of hex nuts. 1. Draw a line to find out the center of the hexagon, sample and punch holes, draw a check circle or check the frame line. 2. Calculate the diameter of the bottom hole according to the formula D=d – P, select a suitable drill bit to drill the bottom hole (drill the central hole with a small drill bit before drilling the bottom hole), and chamfer on both sides of the bottom hole. 3. Follow the correct method to tap M12 thread, and lubricate the thread when tapping. 4. Check whether the diameter of the blank round rod is qualified according to the formula rod d round rod=d-0.13P. 5. First, machine the hexagon head of the bolt in the same way as the nut. 6. Then insert M12 thread in the correct way. When inserting the thread, lubricate it and insert the thread to the bottom. 7. The shape of nuts and bolts shall be chamfered and trimmed. 8. Deburring, overall re inspection, and finishing the workpiece.

In the era of immature machinery and equipment, mechanical parts processing manufacturers in accordance with the traditional processing methods, not only affect the production speed of the workpiece, but also affect the quality of the workpiece. Nowadays, precision mechanical parts processing can reach this standard, is dependent on advanced manufacturing technology, high-precision and high-efficiency automated processing equipment. So what is the impact of precision mechanical parts processing on industrial production? Let's understand the following; Precision mechanical parts machining process is to specify the parts precision mechanical parts machining process and operation methods and other processes, it is in the specific production conditions, the more reasonable process and operation methods, in accordance with the prescribed form written into the process documents, after approval, used to guide production. Precision mechanical parts machining process procedures generally include the following: the workpiece processing process route, the specific content of each process and the equipment and process equipment used, the workpiece inspection items and inspection methods, cutting dosage, time quotas, etc..   There are many advantages of precision mechanical parts machining, first of all, precision mechanical parts machining can effectively improve labor productivity, increase production, have high economic benefits, reduce enterprise costs. Precision mechanical parts processing can also improve labor conditions, reduce labor intensity, shorten labor time and improve the degree of civilized production. In addition, precision mechanical parts processing can reduce production workers, plant area, shorten the production cycle, reduce production costs and save energy, so precision mechanical parts processing can be said to be a lot of benefits.   Precision mechanical parts processing using automatic detection, monitoring devices, is conducive to improving and stabilizing product quality, flexible automated production, can quickly adapt to product changes, it can be seen that the impact of precision mechanical parts processing on industrial production is very large, but the preliminary investment in precision mechanical parts processing is too high, so companies can choose the excellent precision mechanical parts processing plant to carry out the processing of workpieces, so not only reduce the cost, but also improve the quality. What is the impact of precision mechanical parts processing on industrial production? It can be said that high-precision and high-efficiency automatic processing equipment can effectively improve labor productivity, increase production, have high economic benefits and reduce business costs. It can also improve labor conditions, reduce labor intensity, shorten labor time and improve the degree of civilized production. In addition, automated equipment can reduce production workers, shorten the production cycle, reduce production costs and save energy, so it can be said that automated processing equipment has a lot of benefits.

For mechanical processing enterprises, in order to meet the needs of the company's product expansion work, according to the company's existing production situation, the company's years of experience, as well as the different production processes and characteristics of different models, it is necessary to refine and revise the CNC machining center man hour quota. Now let's introduce how to formulate the working hours of CNC machining centers. 1. The Significance of Working Hours of CNC Machining Center Considering the current technical level and management level of the enterprise, the advanced and reasonable man hour quota level can be achieved by improving the operating conditions and operating efficiency, which provides a scientific basis for the production organization and operation management of the enterprise. 2. Calculation of working hours of CNC machining centers In order to make the formulation of man hour quota more advanced, reasonable, standardized and scientific, and provide a basic data platform for operation and management, the Technical Center, HR&Labor Department, Planning&Finance Department and other relevant departments were organized to revise man hour, and a man hour measurement project team was established: (1) Relevant departments discuss and determine the standards based on the current situation and past experience of the enterprise; (2) Summarize the discussion results and formulate the statistical table of man hour quota; (3) The processing technology of some special processing parts is summarized as a reference for the formulation of processing time. (4) Adjust the staffing, and reduce the professional staffing for some simple operations. (5) The original man hours were compared with the revised man hours according to each discipline, and the situation was summarized. 3. Problems in the formulation of NC machining hours (1) The standard of man hour quota formulated for different models is not uniform, which makes it impossible to measure the processing man hour and fails to reflect the rationality of man hour quota. (2) The basis for working hours of the same profession in each workshop is not uniform, and the principle of equal pay for equal work has not been reflected. (3) After years of revision, some models tend to be advanced and reasonable, while the standards for newly launched models are relatively loose when formulating processing hours. 4. Methods and Steps for Working Hours of NC Machining (1) When formulating the working hours of CNC machining centers, it is necessary to formulate the working hour quota standard in combination with the actual process level and industry level. (2) The company's quota standards are analyzed in detail to further subdivide the processing procedures to ensure the enforceability of man hours. (3) After completing the first two steps, complete the CNC machining center man hour quota statistics table. (4) Revise the work step by step according to the statistical table of man hour quota. (5) Determine the man hour quota standard and organize relevant personnel to finalize the draft. (6) After the official release of the revised model, the man hour quota of other models shall be standardized based on this standard.

Hardware mold processing industry is developing rapidly, the competition pressure on enterprises is also increasing, whether in processing technology, or processing quality are constantly improving and innovation. In this era of fierce competition, enterprises can only ensure good quality, good service and continuous innovation capabilities to meet customer needs and thus win the market today we come to science and precision hardware parts processing to pay attention to what? 1, before the work of machinery to check whether the moving part is filled with lubricant, and then start and check the clutch, brake is normal, and the machine tool will be airborne 1-3 minutes, mechanical failure is strictly prohibited when operating.   2, when working to maintain the correct posture, to have sufficient spirit to cope with the work, such as the discovery of physical discomfort should immediately leave the workplace, and reflect to the leadership. Operation must be focused on the mind, gossip is strictly prohibited, cooperate with each other, the operator must not operate in an irritable, tired state to avoid accidents, to ensure operational safety. All employees check whether their clothing meets the work requirements before entering the workplace. No slippers, high-heeled shoes and clothing that affect safety are allowed, and those with long hair should wear safety caps.   3、When replacing the mold, first turn off the power and stop the operation of the punching machine movement department before starting to install and debug the mold. After installation and adjustment, move the flywheel by hand for two test punches to check whether the upper and lower dies are symmetrical and reasonable, whether the screws are strong and whether the crimp circle is in a reasonable position. 4, must wait for all other personnel to leave the mechanical work area, and take away the debris on the workbench, before starting the power to start the machinery.   5、When the machine is working, it is forbidden to put your hand into the working area of the slider, and it is strictly forbidden to take and put the workpiece by hand. In the punching die to take, put the workpiece must be used to meet the standard tools. If abnormal sound or machine failure is found, the power switch should be turned off immediately for inspection. After the machinery is started, one person should transport and operate the machinery, and no one else should press the electric construction or step on the foot switch plate, and no one should put their hands into the mechanical work area or touch the moving part of the machinery with their hands.   6、At the end of the day, the power supply should be turned off and the finished products, side materials and miscellaneous items on the job should be organized to ensure a clean and safe working environment.