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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; CNC machine tool mechanical parts: X-axis fault repair Source: Bearing network time: 2018-04-06 X-axis gap is too big fault repair problem: a matching FANUCOMC; model XH754 CNC machine tool; X-axis gap is too large. Anatomy and disposal process: X-axis clearance consists of coupling clearance, bearing clearance, screw clearance, mechanical elastic clearance, etc. Remove the X-axis guard; power off and shut down; grasp the screw...
During the school work, the author participated in the processing research of thin-walled products. The CNC machine tool used was CK7525 (Baoji Machine Tool Co., Ltd., the system is FANUC0i), which mastered the processing of thin-walled hole parts. The shape of the product is shown in Figure 1. This product is a component used in aviation machinery. The hole wall is very thin, and the diameter is relatively large, and the processing precision is high, which brings great difficulty to the...
CNC machine tools are the key equipment of modern manufacturing. The output and technical level of a national CNC machine tool represent the manufacturing level and competitiveness of the country to some extent. So far, the technical level, performance and quality of CNC machine tools in China are still far from those in foreign countries. Simple CNC lathes with low technical content still dominate. High-end CNC machine tools and functional components mostly rely on imports. Therefore, although...
When CNC wire cutting aluminum parts are used, there are often problems such as serious wear of the feed block, short circuit, broken wire, distortion of the machining track and deformation of the workpiece, and some directly cause the scraped products to be scrapped. Based on the experience accumulated over many years of processing, the author summarizes the key technical issues in the processing practice. First, the problem of wire-cut aluminum pieces easily broken 1. Reasons for wire-cut...
CNC lathes mainly process rotary parts. Typical machining surfaces are nothing more than outer cylinders, outer cones, threads, circular surfaces, and slots. For example, to machine a part with the shape shown, it is appropriate to use a manual programming method. Since different CNC systems have different programming instruction codes, they should be programmed according to the device type. Taking the Siemens 802S CNC system as an example, the following operations should be performed. (1)...
The workpieces processed by CNC milling machines are generally complicated, and some fixtures are often used, which is beneficial to improve machining efficiency and ensure machining accuracy. When I actually processed and processed a part of an electronic scale, I encountered the problem of chamfering the front and back sides with curved symmetrical parts. For this type of part, I designed a set of fixtures. When the workpiece is clamped by the clamp for machining, the clamping and positioning...
The method steps are as follows: (1) First tighten the chamfered positioning pin on the workbench. (2) Then install the pad and the cylindrical positioning pin, but the cylindrical positioning pin can not be fastened, but a certain pre-tightening force can be given. (3) Use the dial indicator to find the center axis of the two pins and make them horizontal and enter the CNC machine. (4) Mount the workpiece and press the platen. (5) The CNC machine tool executes the programmed NC program, first...
After the improvement, a large pad is added under the original fixture, and the large pad is integrated with the pad, the cylindrical positioning pin and the chamfered positioning pin in the original fixture. In order to ensure the accuracy, the machining center is used for careful processing. The key guarantees two points: 1 large pad edge and parallel to the center line of the two cylinders, the parallelism error is not more than 0.015mm. In this way, when the fixture is being corrected, it...
Mechanical parts and auxiliary devices are an important part of CNC machine tools. Among them, the mechanical part mainly includes: machine tool spindle parts, ball screw nut pairs, guide rails and the like. The auxiliary device mainly includes: a numerical control indexing head, an automatic tool changing device, a hydraulic air pressure system and a cooling lubricating device. Therefore, their daily maintenance and maintenance is one of the whole maintenance and maintenance work of CNC...
2. Maintenance and maintenance of the feed transmission The electromechanical components of the feed transmission mechanism mainly include: servo motor and detection component, speed reduction mechanism, ball screw nut pair, screw bearing, moving parts (workbench, headstock, column, etc.). Here we mainly explain the maintenance and maintenance of the ball screw nut pair. (1) Adjustment of the axial clearance of the ball screw nut In addition to the accuracy of the feed motion in a single...
3. Maintenance and maintenance of machine guides The maintenance and maintenance of the machine guide rail is mainly the lubrication of the guide rail and the protection of the guide rail. (1), lubrication of the guide rail The purpose of rail lubrication is to reduce frictional resistance and frictional wear to avoid creeping at low speeds and lowering the temperature rise at high temperatures. Therefore, the lubrication of the guide rail is very important. Lubricating oil is used for the...
The numerical control machining process analysis of the parts is the most important and extremely complicated part of the NC program, and it is also the core work of the CNC machining process design. It must be completed before the NC machining plan is formulated. A qualified programmer must have a clear and comprehensive understanding of the functions and features of CNC machine tools and their control systems, as well as every aspect that affects CNC machining, in order to avoid product...
(2) Process analysis of parts drawing The analysis and research of the part drawing is mainly to carry out the process review of the parts, such as checking the view of the design drawings, dimensioning, technical requirements, errors, omissions, especially for parts with poor structural craftsmanship, if possible and design. The personnel communicate or propose amendments, and the designer decides whether to make the necessary modifications and improvements. 1 Analysis of the integrity and...
Commonly used route for machining parts on CNC lathes: (1) Analysis of the path of the arc of the car In the actual car arc, it is necessary to process multiple knives, first cut off most of the margin, and finally drive out the required arc. The following describes the machining routes commonly used for car arcs. Figure 1 shows the step path of the arc of the car. Figure 2 (a) shows the concentric arc path of the arc of the car. Figure 3 shows the car cone cutting route of the car arc That is...
(3) Analysis of axial feed distance during threading (4) Analysis of the route of the grooving When a rectangular groove with a low turning accuracy and a narrow width is used, a grooving knife having a blade width equal to the groove width can be used to feed the vehicle in one straight direction by the straight forward method. The groove with higher precision is generally used for secondary feed, that is, when the first time the groove is fed, the remaining amount of the car is left on both...
Abstract: In this paper, the precise design of steel ball positioning indexing plate mechanism in CNC machine tools, rotary-type combined machine tools and various rotary tables is analyzed. The factors affecting the accuracy of indexing positioning are analyzed. The solution is proposed and the application examples are given. . In CNC machine tools and turn-on combination machine tools and various rotary tables, the indexing, indexing and positioning work of the commonly used indexing table is...
At 5:58 on November 1, 2011, Beijing time, China's self-developed Shenzhou-8 spacecraft launched its launch at the Jiuquan Satellite Launch Center and successfully entered the scheduled orbit 583 seconds later. With the rapid development of the aerospace industry, the aviation fastener industry has ushered in an unprecedented era. Fasteners are widely distributed in aircraft. For example, there are about 400,000 fuselage and wings on a typical dual-aisle aircraft. From smart fasteners to...
[China Aluminum] The weight of aluminum fasteners is 1/3 of the weight of its equivalent steel fasteners. This often used alloy has surprisingly good strength characteristics. In fact, in the strong-to-mass ratio, aluminum fasteners are higher than any other fasteners made from industrial and commercial materials. Aluminum is non-magnetizable. The thermoelectric conductivity of aluminum is very good, about 2/3 of that of copper in the same volume. Aluminum has good processing characteristics,...
CE(IIW)= C + Mn / 6 +(Cu + Ni)/ 15 +(Cr + Mo + V)/ 5 CE(IIW) : from the International Welding Society, is also the most commonly used carbon equivalent calculation formula, but not applicable to all steel, please pay attention to the requirements of the technical specification when using. CE(WES)= C + Si / 24 + Mn / 6 + Ni / 40 + Cr / 5 + Mo / 4 + V / 14 CEq(JWES) : from The Japan Welding Society, for low alloy hardened + tempered steel, please pay attention to the requirements of the technical...
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