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

CNC lathe processing has been increasingly used in the modern manufacturing industry, and play a common lathe incomparable advantages, so what are the main characteristics of CNC lathe processing? The following I will introduce to you. 1.CNC lathe processing drive chain is short. Compared with ordinary lathes, the spindle drive is no longer a motor, belt, gear vice mechanism, but the transverse and longitudinal feeds are driven by two servo motors, and the traditional parts such as hanging wheel and clutch are no longer used, so the transmission chain is greatly shortened.   2. High rigidity. In order to match the high precision of the CNC system, the CNC lathe is processed with high rigidity in order to adapt to the high precision processing requirements. 3. Light dragging. The tool holder (table) is moved by ball screw vice, with little friction and light movement. The bearing at both ends of the screw is a special bearing with a larger pressure angle than ordinary bearings, and it is matched well at the factory; the lubrication part of CNC lathe machining adopts oil mist automatic lubrication, all these measures make CNC lathe machining move lightly.

What are the differences between the process characteristics of turning milling compound machining plane and solid The plane processing of turning milling compound processing refers to the milling, drilling, reaming, boring, tapping and other processing procedures of plane workpieces; Three dimensional machining refers to the machining of three-dimensional surfaces under the control of the interpolation function of the CNC system of the machining center. The specific machining objects include complex surface workpiece and special-shaped contour surface workpiece. Compared with the plane processing, the plane processing of the machining center is relatively simple in terms of processing difficulty and programming difficulty. Typical plane machining includes cavity machining and contour machining. Cavity machining is to process flat bottomed parts with closed boundary contours. It also includes cavity area machining and contour machining. Dongguan turning milling composite processing generally uses end milling cutter or forming cutter. In terms of steps, it is divided into two steps. The first step is to cut the cavity, mainly using two cutting routes. Whether circular cutting or row cutting, the common point is to ensure the entire cavity area. The cutting area shall be clean without leaving dead corners and damaging the contour. At the same time, the overlapping amount of repeated passing shall be minimized. The second step is to cut the contour, which is usually divided into rough machining and finish machining. The tool path of the former is to offset the milling cutter radius from the contour of the cavity boundary to the inside and from the contour of the cutter to the outside. The machining allowance of the latter is formed. With the continuous development of the industry, the demand for machining complex surfaces and special-shaped parts is also increasing. This kind of parts not only must meet the standard of shape accuracy, but also put forward higher requirements for its surface quality. Therefore, when machining such parts, the machining center used must have the function of three-dimensional displacement. The feed system of the turning milling compound machine, with the interpolation function of the NC system, can carry out multi axis linkage processing, thus realizing the three-dimensional curve displacement of the cutter. Therefore, when encountering such complex parts as above, 

Two minutes to understand the internal structure of the turning milling compound machining center Turning milling compound machining center is equivalent to the combination of CNC lathe and machining center. Turning milling compound machine tool refers to the machine tool that can both turn and mill. It can be used as a lathe and milling machine. At present, both vertical machining centers and horizontal machining centers are turning, milling, drilling and boring compound machine tools. At present, there are two different types of turning milling compound machine tools, one is the combination of different processing methods based on energy or motion. The other is based on the principle of process concentration, mainly based on mechanical processing technology. The combination of turning and milling is one of the fast developing machining methods in this field in recent years. The turning milling compound machining center is mainly used for milling. Only X; Y； Z three-axis linkage Z axis is usually the power axis and spindle (horizontal plus; special machine tool is not used in this example) turning milling compound machine: also known as five axis dual power head machining center, which can turn in addition to milling! This machine is used for handling propellers. It should avoid precision loss and reference loss caused by twice clamping! Turning milling compound machining center is the main type of compound machining machine tools. In addition to the function of CNC lathe, it can also complete plane milling, drilling, tapping, straight groove, spiral groove, milling, etc. It has turning function, milling and boring and other composite functions, realizing a processing concept, which can be clamped in time, tight and complete.

How to debug the newly purchased turning milling machine tool Dongguan turning milling compound processing is one of the most popular processing technologies in the field of mechanical processing. It is an advanced manufacturing technology. Compound machining is to realize several different machining processes on one machine tool. The complex machining which is widely used and difficult is turning milling complex machining. How should we debug the turning milling compound machine after we buy it? Now let's have a look! 1. During program debugging, the operator can place one finger on the cycle start button and another finger on the edge of the cycle hold button to stop the program execution in time. 2. When debugging the program, the operator needs to check the fault and rationality of the next program again and make corresponding adjustment after executing a program on the CNC lathe. 3. In the moving process of the CNC lathe, the operator needs to study the changes of the tool coordinates on the screen, and whether the moving end point coordinates are consistent with the tool coordinates in the program. The drilling action is the same. The maintenance of turning milling compound machine tool system is very important. For such high-precision, useful and valuable equipment, the service life and wear cycle of parts can be extended, and the service life of Dongguan turning milling compound processing equipment can be extended.

What are the process characteristics of spiral bevel gear in precision parts processing: In precision parts processing, the structural characteristics of spiral teeth are the same as those of straight bevel gears. The standard module of spiral bevel gears refers to the large end module, and the calculation of nominal size is basically the same. The difference is that the gear tooth profile of the former is straight, its pitch bevel gear line (the intersection line between the tooth surface and the pitch bevel gear line) is straight, and the gear tooth profile of the latter is curved, its pitch bevel gear line is arc, and the tooth surface is convex on one side of the tooth length direction, The other side is concave. In addition, the pressure angle of spiral bevel gears is specified in the normal direction of gear teeth. The rotation direction and helix angle of spiral bevel gears are as follows: when facing the tooth top of the gear and looking along the axis, if the small end of the gear tooth moves counterclockwise along the tooth line to the big end, it is called a left-hand gear; If it is clockwise, it is called right-hand gear. In precision parts processing, the included angle between the tangent line of a point on the pitch bevel gear line and the pitch bevel generatrix passing through the point is called the helix angle. The helix angle of each point on the tooth rectangle of the spiral bevel gear is not equal, and the helix angle of the midpoint of the tooth surface is the standard helix angle of the spiral bevel gear.  

What is the right angle groove milling process in precision parts processing In precision parts processing, right angle groove is composed of three planes, and its section shape is three straight lines, and adjacent straight lines are perpendicular to each other. Right angle groove is generally divided into three forms: closed, semi closed and open right angle groove. The right angle groove can be distributed on the plane and cylindrical surface. The more classical right angle groove is the keyway, which can be divided into ordinary flat keyway and semicircular keyway. The milling process characteristics of right angle groove are as follows: 1. Use fixed diameter or fixed width milling cutter (such as keyway milling cutter, semicircular keyway milling cutter, disc slot milling cutter, etc.) for processing to control the groove width size with high accuracy, such as the shaft keyway matched with flat key and semicircular key, open right angle groove with matching accuracy requirements, etc. 2. In the machining of precision parts, different tool setting methods are usually adopted for the symmetrical position of the keyway on the shaft according to the different accuracy levels. For keyways with high symmetry requirements, the indicator ring table method is used to find the relative position between the workpiece axis and the tool axis or the middle section of the disc milling cutter. Keyways with low symmetry requirements can be processed by the tool alignment method with the cutting mark. 3. V-shaped block is usually used for positioning the keyway on the shaft, or the indexing head self centering chuck is used for clamping to ensure the symmetry of the workpiece and other main processing accuracy requirements

What is indexable milling cutter in precision parts processing There are two series of indexable milling cutters for precision parts processing. Among them, the series of blades with back corners are suitable for continuous milling of steel and iron castings. They are light and labor-saving, consume less power, and have low requirements on the process system. A group of blades has four cutting edges. The series of blades without back angle are suitable for intermittent cutting of steel and iron castings. The cutting edge has high strength and is not easy to break when machining hard steel and uneven materials. With this type of milling cutter, the accuracy of the spindle of the milling machine is not required, but the machine tool is required to have sufficient power and the rigidity of the process system is good. A group of blades has 8 cutting edges, so the utilization rate of the blades is high. According to the size of the main deflection angle, there are mainly two forms: 75 ° and 90 °. According to the combination of the back front foot (which mainly affects the required cutting power) and the side front foot (which mainly affects the chip deformation and discharge direction), there are usually three forms. Double negative rake angle is suitable for rough milling and discontinuous cutting; Double positive front angle is suitable for processing aluminum alloy, copper alloy, plastic and composite materials, as well as semi finishing of steel; The negative and positive rake angles have the advantages of the first two combinations. They are suitable for processing all kinds of carbon steel, alloy steel, tool steel, cast iron and stainless steel in precision parts processing, with strong versatility.

How to stop the machine in the machining of turning milling compound center Generally speaking, Dongguan turning milling compound center is mainly based on machining technology. The combination of turning and milling is one of the fast developing machining methods in this field in recent years. The machining center is a high-precision production machine that uses fully automatic (semi-automatic) shaft and flange parts processing within the processing time. The machine tool adopts the first turning and milling cutter, and the technical operation from workpiece clamping to high NC support. Complex design nodes are solved by computing methods that reflect the real machining environment. The solid bed ensures the high rigidity of the machine required for precision and heavy machining on two spindles and independent tool holders. All tool holders have longitudinal and transverse feeds. The main tool holder is positioned on the workpiece, and other square tool holders can be positioned on and under the workpiece. In order to stop the motor quickly, the power supply of the motor shall be reversed and the motor shall be braked quickly under the reverse connection braking state. When the motor speed of Dongguan turning milling compound center is low, the control circuit will be automatically cut off, the motor power will be cut off, and the free stop will be implemented depending on the moving contact of speed relay KP1 or KP2.

How to program the turning milling compound machining due to the large concave convex surface of the workpiece The large concave convex area of the turning milling compound machining surface is prone to interference between the tool and the workpiece, causing serious consequences. Positioning 3+2 machining method can overcome the shortcomings of 3-axis CNC machining of complex surfaces. Turning milling compound positioning 3+2 processing refers to turning B and C axes to a certain angle and locking for processing. When the processing of one area is completed, adjust the B axis and C axis according to the normal vector direction of the other processing area, and continue the processing angle. Its essence is to change five axis linkage machining into fixed angle machining in a certain direction. The tool axis direction will not change during machining. Because it can realize one-time machining, 3+2 positioning machining has obvious advantages in efficiency and quality compared with 3-axis CNC machining. Turning milling compound multi axis milling finishing solution. The multi axis linkage machining method is used to finish the machining of multiple complex fragment surfaces of the cylinder part of complex rotating parts, and the machining geometry, driving mode and related parameters are selected. In actual processing, the characteristics of the machine tool should be fully used to effectively control the change of the tool swing angle, so that the displacement and swing angle can be well matched to prevent over cutting. In order to reduce the sharpness of the tool swing angle at the corner of the part, the transition tool position shall be appropriately increased when machining the corner of the part. This is also conducive to the smooth operation of the machine tool, avoiding over cutting, and improving the surface quality of the Dongguan turning milling composite machining parts.

How to Measure the Error of Roundness in Precision Parts Processing The roundness error can be checked by using the roundness meter method and the two-point method and three-point method in the processing of precision parts. The rule of the roundness tester is to place the measured workpiece on the worktable of the roundness tester, align the rotation axis, and make the measuring head of the roundness tester contact the outer circle of the workpiece and rotate. The final measurement results are displayed through sensors, amplifiers, filters and calculation circuits. If the output is the figure of the actual contour, the concentric circle template package can be used, and the difference between the radii of the two containing concentric circles is taken as the roundness error of a section. The roundness tester is suitable for parts with high measuring accuracy requirements. Two point method and three-point method When the shape of the measured profile is an even number of edges and circles, the roundness error can be measured by two point method. Use calipers, micrometers, micrometers and other measuring instruments to measure the maximum difference of diameter along the entire circumference of the normal section circle, and take half of it as the roundness error of the section circle, Since the circles with the largest and smallest diameters are not necessarily concentric, this method is only an approximate measurement. When the measured contour is an odd edge circle, the roundness error cannot be measured with the two-point method, and the three-point method can be used for measurement. Support the measured workpiece with a V-shaped frame, measure the maximum difference value of the workpiece rotation cycle with an indicator, and take it as the roundness error of the section generally. Common included angle of V-shaped frame α There are 60 °, 72 °, 90 °, 108 ° and 120 °. The three-point method can also be used for high-precision measurement in precision parts processing.