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

First, in the feed mechanism to adjust to improve the machining accuracy of CNC lathe First, in the ball screw guide error caused by the CNC lathe machining accuracy is affected, in this regard, the main factor is the pulse, so in the manufacturing ball screw program, to minimize the error caused by the impact of the pulse on the CNC lathe machining accuracy.   Second, in the feed mechanism gap for CNC lathe machining accuracy, which is mainly due to the problems in the components of its transmission machinery and lead to the impact, thus reducing the precision of runaway lathe processing. The main components are the gears, connecting joints, ball screws and the supporting shaft. Problems between these components will affect the accuracy of CNC machine tools, so we need to strengthen the connectivity between their structures. The precision between them will affect the precision of lathe processing, thus reducing the gap between each structure and strengthening the tightness between each structure will improve the precision of CNC lathe processing. Second, the impact of the error in the programming   The difference between CNC lathe and ordinary lathe lies in the different precision of the parts, but the error that appears in the programming process can be minimized, which requires us to reduce the error from several aspects, so as to improve the precision of CNC lathe machining. The first one is the impact on the accuracy of the lathe due to the interpolation error. So try to adopt certain ways to reduce the problems that occur in programming, using absolute way programming, and there can eliminate the error is to use the insertion will reference point quality for programming in the program.   Second, the impact of approximation error on the final accuracy. Since there is the use of approximation in the process so that there will be errors. So try to master the contour equation to program will largely reduce the error, so that the impact on the accuracy of CNC lathe machining can be eliminated;.   Thirdly, the influence of rounding error in the programming process reduces the machining accuracy of CNC lathe, so we should choose the minimum value of linear displacement determined by the pulse equivalent for reference when processing. So when programming, we have to work strictly in accordance with the specifications above the drawing as the reference.    

Machining principle of non-circular curve in CNC machining Non circular curves in precision parts processing are divided into analytical curves and non analytical curves like tabular curves. For manual programming, the processing of analytical curves is generally solved. Therefore, this section mainly analyzes the processing error of analytical curves. The mathematical expression of analytical curve can be given in the form of rectangular coordinates of y=3 (x), polar coordinates of p=p (), or parametric equations. Through coordinate transformation, the latter two forms of mathematical expressions can be converted into rectangular coordinate expressions. This kind of parts and various rotary parts with non-circular curve as the generatrix processed on CNC lathes are mainly used. Precision parts processing The programming method in precision parts processing is as follows: First, it should be decided whether to use straight line segment to approximate non-circular curve or arc segment to approximate non-circular curve. If linear segments are used to approximate non-circular curves, sharp corners exist at the connection between the linear segments. Because the tool cannot continuously cut the part at the sharp corners, hard spots or cut marks will appear on the part surface, which will deteriorate the quality of the machined surface.

Common instruments for maintenance in precision parts processing In the process of fault detection of CNC machine tools for precision parts processing, it is necessary and effective to use some necessary instruments. These special instruments can directly reflect the condition of fault points from the perspective of quantitative analysis. Precision parts processing 1. Vibration meter The vibration measuring instrument is the most commonly used and basic instrument in vibration detection in precision parts processing. It amplifies, transforms, integrates and detects the weak signal output by the vibration measuring sensor, and then directly displays the vibration value of the measured equipment on the instrument or display screen. In order to meet the requirements of on-site testing, the vibration measuring instrument is generally made into a portable. 2. Infrared thermometer Infrared temperature measurement is to use the principle of infrared radiation to convert the measurement of object surface temperature into the measurement of its radiation power. The infrared detector and corresponding optical system are used to receive the invisible infrared radiation energy of the measured object, and convert it into other energy forms for easy detection for display and recording. 3. Oscilloscope In NC system repair, the machine tool is usually tested with a dual channel oscilloscope with a frequency band width of 10~100MHz. It can not only measure the parameters such as level, upper and lower edge of pulse, pulse width, period and frequency, but also compare the phase and level amplitude of two signals. It is often used to observe the oscillation waveform of the main switching power supply, the ripple output by the DC power supply or the speed measuring generator, and the overshoot and oscillation waveform of the servo system. It is used to check and adjust the output waveform of the photoelectric amplifier of the tape reader, as well as check the vertical and horizontal oscillation of the CRT circuit, the scanning waveform, the video signal of the video amplifier circuit, etc.

Analysis of CNC Precision Machining Plant on Machining Route of Groove Shenzhen CNC Precision Processing Factory can directly cut into the groove with the same width as the groove for the groove with relatively small width and depth values and low precision requirements. After the cutter cuts to the bottom of the groove, the delay command can be used to make the cutter stay for a short time to trim the roundness of the groove bottom. In the exit process, the working speed can be used. For deep groove parts with small width value but large depth value, in order to avoid the phenomenon that the front pressure of the tool is too large and the tool is broken due to the poor chip removal during the cutting process, the method of staged feed should be adopted. After the tool cuts into the workpiece at a certain depth, it should stop feeding and back a distance to achieve the purpose of chip breaking and chip removal. At the same time, it shall be noted that the tool with higher strength shall be selected as far as possible. Turning milling compound machining parts The cutting of wide groove is generally the groove that is larger than the width of a cutter. The width and depth of the wide groove require relatively high precision and surface quality. Roughly cut the wide groove by cutter arrangement. Dongguan CNC Precision Machining Factory Then use the finishing grooving cutter to cut along one side of the groove to the groove bottom, finish machining the groove bottom to the other side of the groove, and then exit along the side.

Machine Clamping Indexable Blade in Precision Parts Processing The national standard of carbide indexable inserts in precision parts processing is S0 international standard. The expression method, variety specification, dimension series, manufacturing tolerance and measurement method of product model are the same as those of S0 standard. In addition, in order to adapt to the national conditions of our country, a dash is added after the 9 numbers specified in the international standard, and then a letter and a digit are used to indicate the form and width of the chip breaking groove of the blade. Therefore, the models of indexable inserts in China share 10 numbers to represent the characteristics of main parameters. Precision parts processing During precision parts processing, according to the regulations, the first 7 number positions must be used for any type of blade, and the last 3 number positions can only be used when necessary. But for the turning blade, position 10 belongs to the part marked in the standard requirements. No matter whether there is the eighth or ninth digit, the tenth digit must be separated from the previous digit by a dash "one", and its letters must not use the used (E, F, T, S, R, L, N) letters of the eighth or ninth digit. If only one of the eighth and ninth digits is used, it shall be written on the eighth digit, with no space in the middle.

Classification of CNC Machine Tool Faults in Precision Parts Processing The components of CNC machine tools that fail in precision parts processing are classified as (1) main machine failures Common main machine failures include: mechanical transmission failures caused by improper mechanical installation, commissioning and operation, or failures caused by excessive friction of guide rail movement. The failure of hydraulic, lubricating and pneumatic systems is mainly caused by pipeline blockage and poor sealing. (2) Electrical fault Electrical fault is divided into weak current fault and strong current fault. The weak current part mainly refers to CNC devices, PLC controllers, CRT displays, servo units, input and output devices and other electronic circuits, which can be divided into hardware failures and software failures. Precision parts processing Hardware failure in precision parts processing mainly refers to the failure of integrated circuit chips, discrete components, connectors and external connection components on the printed circuit boards of the above devices. Common software failures include: error in processing program, change or loss of system program and parameters, error in computer operation, etc. The strong current part refers to circuit breakers, contactors, relays, switches, fuses, power transformers, motors, electromagnets, travel switches and other electrical components and the circuits they compose. The failures in this part are very common and must be paid enough attention.

Overview of CNC Programming in Precision Parts Processing CNC machine tool is an efficient automatic equipment that can automatically process the workpiece according to the part processing program prepared in advaCNCe. Before CNC programming, programmers should first understand the specifications and performaCNCe of the CNC machine tools used, the fuCNCtions of the CNC system and the format of programming instructions. Precision parts processing When preparing the program for precision parts processing, first analyze the technical requirements specified in the drawing, the geometric shape, size and process requirements of the parts, determine the processing method and processing route, and then conduct mathematical calculation to obtain the tool position data. Then, according to the code and program format specified by the CNC machine tool, the size of the workpiece, the path of the tool movement center, the displacement Cutting parameters and auxiliary fuCNCtions (tool change, spindle forward and reverse rotation, coolant switch, etc.) are compiled into processing programs and input into the CNC system, which controls the CNC machine tool to automatically process.

Overview of Machining Center in Precision Parts Processing The precision parts machining center refers to the basket milling machining center. It centralizes the functions of milling, basket cutting, drilling, tapping and thread cutting on one equipment, which enables it to have a variety of technological means. Since the workpiece can automatically process more than two surfaces after being clamped once, and has a variety of tool change or tool selection functions and automatic workbench exchange device (APC), the production efficiency and automation are greatly improved. Precision parts processing In order to process the required shape of the part, the precision parts machining center must have at least three coordinate movements, which are composed of three linear motion coordinates X, Y, Z and three rotation coordinates A, B, C, and more than ten motion coordinates. Its control function should be at least two and a half axes linkage, and more can realize five axis linkage and six axis linkage. Now there is a parallel CNC machine tool, so as to ensure that the tool moves according to the complex trajectory. The precision parts machining center shall have various auxiliary functions, such as: various machining fixed cycles, automatic compensation of tool radius, automatic compensation of tool length, tool breakage alarm, tool life management, automatic overload protection, screw pitch error compensation, screw clearance compensation, automatic fault diagnosis, workpiece and machining process display, online workpiece detection and automatic machining compensation, even cutting force control or cutting power control, DNC port, etc.

Basic Concept of High Speed Cutting in Precision Parts Processing High speed cutting (HSM or HSC) in precision parts processing usually refers to end milling at high spindle speed and high feed speed. It is an advanced processing technology that quickly went to practical application in the 1990s, and has been widely used in aerospace manufacturing, mold processing, automobile parts processing, and precision parts processing. Precision parts processing High speed milling technology in precision parts processing can be used not only for free cutting metals such as aluminum alloy and copper, but also for difficult to machine materials such as quenched steel, titanium alloy and high temperature alloy, as well as non-metallic materials such as carbon fiber plastics. For example, in the processing of aircraft parts such as aluminum alloy, there are many curved surfaces and complex structures, and the amount of material removal is up to 90%~95%. High speed milling can greatly improve the production efficiency and processing accuracy. In mold processing, high-speed milling can process steel parts with a hardening hardness greater than HRC50. Therefore, in many cases, EDM and manual grinding can be omitted, and high-speed milling can be used after heat treatment to meet the requirements of part size, shape and surface roughness.

How to Pay Attention to the Adaptability of CNC Precision Machining In general, in the process of selecting and deciding the content of CNC processing in Shenzhen CNC precision processing plant, the relevant technologists must make a sufficiently specific and sufficient process analysis on the part drawing or part model. In the process analysis of CNC machining, the programmers shall, according to the basic characteristics of CNC machining and the fuCNCtions and practical work experieCNCe of the CNC machine tools used, strive to make this preliminary preparation more careful and solid, so as to pave the way for the following work, reduce errors and rework, and leave no hidden dangers. Turning and milling Due to the high degree of automation, stable quality, multi coordinate linkage, and convenient process coCNCentration of CNC processing, but the high price and high technical requirements for operation are prominent, improper selection of processing methods and processing objects will often cause great losses. In order to give full play to the advantages of numerical control processing and achieve better economic benefits, Shenzhen CNC Precision Processing Factory should be very careful in selecting processing methods and objects, and sometimes even make changes to its shape, size, structure, etc. to adapt to numerical control processing without changing the original performaCNCe of the workpiece.