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

Mechanical parts processing skills process is the process of workpiece or part production and processing, the choice of mechanical processing methods, direct changes to the shape, scale and surface quality of the blank, so that it becomes a part of the process is called mechanical processing skills process. For example, a common parts processing skills process is rough machining - finishing - assembly - inspection - packaging, that is, a processing of the abstract process. So we know how to select the mechanical parts processing tools? Next, let me share with you! Mechanical parts processing tools have the following points.   The reasonable or perhaps unreasonable selection of mechanical machining skills will directly affect the machining accuracy, production power and economic efficiency of the workpiece. Should be based on the type of production, detailed processing conditions, workpiece structure characteristics and skills required to select skills and equipment.   I. Selection of fixtures. Single-piece, small batch production should be the primary choice of a variety of general-purpose fixtures and machine tool accessories, such as chucks, machine tools with flat vise, indexing head number; for a large number and a large number of production, in order to improve the production rate should be selected for special efficient fixture; multiple types of medium and small batch production can be used to adjust the fixture or group fixture. II. Selection of tools Normative tools are usually preferred. If you choose mechanical assembly, you can use a variety of high-efficiency special tools, composite tools and multi-edge tools. The type, standard and accuracy level of the tool should fit the processing requirements.   III. Selection of gauges. Single-piece, small batch production should be widely used general-purpose gauges, such as vernier calipers, rulers and micrometers, etc.; a large number, a large number of production should be selected to use the limit of the block and efficient special checking fixtures and gauges. The accuracy of the gauge is necessary to adapt to the accuracy of processing.

In the field of mechanical parts processing industry, there are very many technical terms, so we all know what these terms mean? Today let me share the common terms of mechanical parts processing! 1：What do you mean by plate thickness treatment? A: The method taken to eliminate the influence of the plate thickness on the shape and size of the unfolded drawing.   2: What are the general steps to calculate the unfolded length of the bent parts? A: The bending part is divided into straight and circular segments; the length of each segment is calculated separately; the calculated lengths are added together.   3: Under what circumstances should the cutout of the section be applied? A: Angle, channel, I-beam bent into a folded angle.   4: What are the stages of the whole punching process? A: In three stages. Elastic deformation stage; plastic deformation stage; shearing stage.   5: What is punching and cutting? A: A stamping process in which one part of the sheet is separated from another part along certain closed lines using a punching template.   6: How many types of bolted couplings are there? A: There are two kinds of couplings: the coupling to withstand the role of axial tensile load; the coupling to withstand the role of lateral.   7: What are the measures to prevent loosening of the bolt coupling? A: Increase the friction; mechanical anti-loosening.   8: What are the mechanical anti-loosening methods? A: cotter pin; stop washer; stop washer; tandem steel wire.   9: What is called the welding arc? A: In the gas medium between the two electrodes to produce a strong and persistent discharge phenomenon.   10: welding arc consists of which parts? A: By the cathode area; anode area and arc column. 11: What are the three directions of movement of the welding rod? A: Moving in the direction of the molten pool; moving in the direction of welding; making a lateral swing.   12：Welding seam can be divided into several types according to the spatial position? A: It is divided into flat welding, vertical welding, horizontal welding and back welding.   13: What are the characteristics of coherent line? A: It is both the common line and the dividing line on the surface of two forms; it is always closed in space.   14：What do you mean by coherent line? A: A component consisting of two or more intersecting geometries.   15：What are the factors that affect the quality of punching? A: Die clearance; the centerline of convex and concave die does not overlap; the working edge of die is worn and dulled.   16: What is the general principle of die design? A: Under the premise of ensuring the quality of stamping, we should strive to design a die that is easy to manufacture, simple in process Low cost and easy to use.   17: What is the purpose of calculating the calendering force? A: It is for the correct selection of calendering equipment.   18: What is called free bending? A: When the end of bending convex die, blank, concave die coincide with each other after the impact no longer occur.   19: What is called correction bending? A: The convex die, blank and concave die, after the coincidence of the three, there is an impact on the bending parts to play a corrective role.   20：What defects are easily produced when pressing the head? A: Wrinkling and puckering; straight edge indentation crater; micro-crack on outer surface; longitudinal tearing; skewing; ellipse; inconsistent diameter size.

In the field of mechanical parts machining industry, mechanical parts machining center needs programming, so we know what are the two mechanical machining programming methods? Let me share with you next! 1. Dynamic programming software (CAD/CAM) to draw three-dimensional graphics, according to the type of surface set a variety of corresponding parameters, automatically generated CNC machining program. The above two programming methods can basically meet the requirements of CNC machining. But the processing function equation curve contour is very difficult, because the early milling machine CNC system does not have the function operation function, directly with the G code can not prepare the function equation curve processing program, (lower version of) CAD/CAM software usually does not have the function of the equation input graphics directly. So cutting function equation curve contour, the current method is usually used: according to the requirements of the drawing, calculate the coordinates of the points on the curve, and then according to the calculated coordinate value with linear or circular arc command code to prepare the program, manually input the system for processing. 2. Simple contour - straight line, arc composed of the contour, directly programmed with the G code of the CNC system.

Precision parts processing and manufacturing is the processing of high precision mechanical parts as the object. Using systematic and integrated theory and technology, the organic combination and optimization of material supply, processing, testing and handling are realized according to the structure and requirements of the processed workpiece, and the production of parts is completed under precise processing conditions. So do you know the prospects of precision mechanical parts processing industry? Here let me share it with you! The purpose is to realize the concept of "small machine tool processing small parts", which is different from the manufacturing method and technology of ordinary mechanical parts. It will become the most effective processing method for processing non-silicon materials (such as metals, ceramics, etc.) high precision parts. It can fundamentally solve the problems existing in the processing method of precision instrument parts. It has the advantages of high precision, low energy consumption, flexible production and high efficiency. Reduce the size of the entire manufacturing system and precision parts, both to save energy and manufacturing space and resources, in line with energy-saving, environmentally friendly production model. It is one of the development directions of green manufacturing.   With the development of aerospace, defense industry, microelectronics industry, modern medicine and bio-engineering technology. The demand for precision / ultra-precision mechanical parts (feature size in the micron level to millimeter level) is increasingly urgent. The specificity of its structure shape, diversification of the part material, size and surface quality of high precision has become a significant feature of high-precision mechanical parts and their micro devices and equipment, in the use of function, material properties, structural shape, reliability and other aspects of the requirements are increasingly high. At present, the main manufacturers of precision machinery exist in developed countries in the West and certain developing countries and regions with high levels of economic development (such as Singapore, etc.). Customer base also exists mainly in these areas. High-precision parts are used in various industries for testing equipment-scientific instruments, and in domestic terms are mainly used in scientific instruments in the instrument and meter industry.   Precision machinery manufacturing and ordinary machinery manufacturing compared to the product technology content (design and production), sophisticated processing equipment, high value-added, sales are mostly small batch differentiation characteristics.

Precision mechanical parts processing in the present, precision, ultra-precision technology in China's application is no longer limited to the defense of cutting-edge and aerospace and a few other sectors, it has been extended to many areas of the national economy, the scale of application has also grown significantly. So we know the scope of application of precision mechanical parts processing? Here let me tell you! Computer, modern communication, film and television communication industries now require precision and ultra-precision machining equipment as a support condition for their rapid development. Computer disks, VCR heads, laser printers, multi-faceted prisms, photocopiers and other parts of precision, ultra-precision processing, the use of high-efficiency, high-volume automated production methods. The United States, Britain, Japan, Germany, the Netherlands and other developed countries are at the forefront of precision and ultra-precision machining technology in the world. The technology in this area is not only used in the military sector, but also in large quantities for the production of civilian products.   In the coming period, China will be highly efficient, Shenzhen precision parts processing ultra-precision machining lathe, CNC ultra-precision composite processing machine tools, ultra-precision surface and external grinding machines as the focus, the development of ultra-precision machining technology and application engineering, drive a number of precision, ultra-precision basic functional components, such as ultra-precision spindle axis system, ultra-precision servo feed system, ultra-precision measurement system and error automatic compensation system Development, to meet the development needs of aerospace, aviation and computer and other high-tech industries. Precision mechanical parts processing, ultra-precision processing, can be used for secondary processing machine tools; milling machine tools; cutting machine tools; drilling machine tools; milling machine tools; milling machine tools; milling cross slot machine; milling machine tools; chamfering machine tools; indentation machine; tapping machine; cutting groove machine tools; milling machine; milling machine tools; milling machine tools; milling machine tools; milling square machine tools; milling machine tools; milling plane machine tools; milling machine steps; multi-functional processing machine; combined processing machine tools; indexing milling machine; Shaft processing machine tools; flat and slot parallel vertical, hole and flat slot parallel vertical into the angle can be processed, different products can be designed according to the needs of the relevant machine, while some machines can process a variety of products. High efficiency, accuracy up to +/-0.015MM, mainly for various types of shaft (diameter 2-25MM), potentiometers, radiators, plugs, lighting accessories and other fields, copper, iron, aluminum, stainless steel, non-metallic materials are available, the shape can be round or square, according to the requirements of customized.

In the mechanical parts processing industry, the surface roughness of the workpiece is also known as the degree of finish, the general precision machining parts surface roughness requirements are relatively high, in the mechanical parts processing process, how do we control the mechanical parts processing surface roughness? Here let me share with you! 1. cutting processing amount: it means that the cutting feed can be on the cutting amount, can be appropriate to reduce the amount of surface processing.   2. Selection of tool geometric parameters: from the processing tool geometric parameters, can be appropriate to reduce the sub-deviation angle and increase the radius of the tip of the arc, if necessary, you can grind the trimmed edge. Make cutting and processing easy, reduce surface roughness.   3. Control machine vibration: from reducing the friction between the tool and the workpiece, extrusion, so that the tool edge sharpening, filling the cutting fluid and some good toughness of the workpiece material for appropriate heat treatment, etc.. 4. Select a reasonable machining process: the process of precision mechanical parts processing, machining process is also very important, such as the process is not reasonable may affect the processing quality and productivity. Many precision machining parts need rough machining after finishing to complete the finish requirements.   5. Different raw material selection: mechanical equipment spare parts, consisting of many different raw materials processing, according to the different density of raw materials, processing process tool and machine tool selection is directly related to the surface roughness.

Machining of mechanical parts is the process of changing the external dimensions or properties of a workpiece by various machines. Mechanical parts processing industry is a very important industry, so do you know what principles of mechanical parts processing in the processing? Let me tell you the following! Mechanical parts processing specific processing principles.   (1), in order to ensure the accuracy of mechanical parts processing, coarse and fine mechanical parts processing is best to be carried out separately. Because rough mechanical parts processing, cutting volume, the workpiece by the cutting force, clamping force, more heat, as well as mechanical parts processing surface has a more significant machining hardening phenomenon, the workpiece exists inside a large internal stress, if rough, rough mechanical parts processing continuously, the precision of the parts after finishing will be quickly lost because of the redistribution of stress. For some mechanical parts processing accuracy requirements of high parts. After rough machining and before finishing, should also arrange low-temperature annealing or aging treatment process to eliminate internal stress. (2), the reasonable choice of equipment, rough mechanical parts processing is mainly cut off most of the machining allowance, and does not require a high precision mechanical parts processing, so rough machining should be in the power, accuracy is not too high machine tools, finishing processes require a higher precision machine tools processing. Rough and finish machining on different machine tools, can give full play to the equipment capacity, but also to extend the service life of precision machine tools.   (3), in the mechanical parts processing process route, often arranged with heat treatment process. Heat treatment process location arrangements are as follows: to improve the cutting performance of metals, such as annealing, normalizing, tempering, etc., generally arranged in mechanical parts before processing. Shenzhen machining for the elimination of internal stress, such as aging treatment, tempering treatment, etc., generally arranged in the rough machining after, before finishing. In order to improve the mechanical properties of the parts, such as carburizing, quenching, tempering, etc., generally arranged in the mechanical parts after processing. Such as heat treatment after a large deformation, but also must arrange the final processing process.

Every industry has its own process, and the mechanical parts processing industry is no exception. So do you know what are the processes of mechanical parts processing? Here let me tell you! Mechanical parts processing plant process procedures is one of the process documents that specify the parts machining process and operation methods, 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.   Mechanical precision parts processing 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.. Mechanical parts processing plant process is based on the process, changing the shape, size, relative position and nature of the production object, so that it becomes a finished or semi-finished product, is each step, the details of each process, for example, the above, rough machining may include blank manufacturing, grinding, etc., mechanical precision parts processing may be divided into car, clamp, milling machine, and so on, each step to have detailed data For example, how much roughness should be achieved, how much tolerance should be achieved.

Before processing mechanical parts, a drawing will be drawn, which is marked with the process requirements of mechanical parts processing, but can not guarantee that every part processed can meet the standard, so they will be accepted. So we know what the acceptance of mechanical parts processing include? Here let me tell you!   Specifically, including acceptance requirements and acceptance procedures. I. Acceptance requirements 1. Appearance inspection (1) Check whether the finish of the machined parts meets the requirements of the drawings. (2) Check whether there is any damage, rust, bruise and correct thread shape and angle on the exterior of the machined parts. (3) If the above problems are found, make detailed records for inspection. 2. Quantity acceptance (1) Based on the supply contract and processing voucher, check the material, specification and quantity of the processed parts strictly against the drawings, and check them piece by piece. (2) Make a good record of quantity acceptance, stating the acceptance place, time, participants, type, product name, quantity due and actual arrival. 3. Quality acceptance (1) To be assembled in strict accordance with the provisions and procedures required by the general assembly drawings. (2) In quality acceptance should be carefully recorded. If there is any quality problem with the workpiece, we should notify the outsourcing processing unit in writing. Depending on the situation, decide whether to return or replace. (3) Special requirements can be found in the case of processing units to jointly accept, assembly, installation of qualified before signing acceptance documents. Second, acceptance procedures 1. After the receipt of machined parts, both send full-time acceptance personnel according to the contract against the drawing requirements of the material, specifications, models, quantities of machined parts for acceptance . 2. Acceptance period is generally 1-2 days. Special circumstances to determine the use of the effect. If there is a quality problem, you can return to the processing unit, claims, processing units bear the economic loss. 3 . General non-production section signed processing contracts, will be used by the department directly accepted, fill in the acceptance report.   4. Acceptance of unqualified parts, acceptance staff must be within the specified acceptance period to overhaul, return procedures. 5. Special precision machining parts acceptance, acceptance by the full-time acceptance staff to organize the relevant personnel to jointly accept, and fill out a detailed acceptance report form. Acceptance of unqualified parts to fill out a detailed inspection report, as a requirement to improve the conditions of processing accuracy and determine the future direction of the choice of parts outsourcing manufacturers.

Ultra-high-speed machining technology in precision mechanical parts processing is an important part of precision machining technology, because precision machining requires high accuracy and small error standards, so that it is necessary to work on machine tool processing and super-hard materials to solve these problems. By improving the machine tool's high precision machining capability, to solve the material cutting speed and so on. So what are the ultra-high speed machining skills? Let's look at the following in detail. Ultra-high-speed machining skills are modern machining skills that use super-hard material cutting tools to improve the removal rate, machining accuracy and machining quality by greatly improving the cutting speed and feed rate.   The cutting speed limit of ultra-high-speed machining varies according to the different workpiece materials and different cutting methods. At present, it is generally believed that the cutting speed limit of ultra-high-speed cutting of various materials is: aluminum alloy has exceeded 1600m/min, cast iron is 1500m/min, super heat-resistant nickel alloy is 300m/min, titanium alloy is 150~1000m/min, fiber-reinforced plastic is 2000~9000m/min.   The cutting speed limits of various cutting processes are: 700~7000m/min for turning, 300~6000m/min for milling, 200~1100m/min for drilling, 250m/s or more for grinding, etc. Ultra-high-speed machining skills include: ultra-high-speed cutting and grinding mechanism research, ultra-high-speed spindle unit manufacturing skills, ultra-high-speed feed unit manufacturing skills, ultra-high-speed machining tool and abrasive manufacturing skills, ultra-high-speed machining online active detection and control skills, etc.   Ultra-fine machining is the dimensional accuracy of the machined parts is higher than 0.1μm, the appearance of the roughness Ra less than 025μm, as well as the machine tool positioning accuracy of the resolution and repeatability is higher than 0.01μm processing skills, also known as sub-micron processing skills, and is developing to nanometer-level processing skills.   Ultra-fine machining skills include: ultra-fine machining mechanism, ultra-fine machining equipment manufacturing skills, ultra-fine machining tools and sharpening skills, ultra-fine measurement skills and error compensation skills, ultra-fine machining task premise research.