First, the formation of the reasons for the abnormal machining accuracy caused by the formation of abnormal machining accuracy reasons for the strong concealment, diagnosis is more difficult, summed up five main reasons: the machine tool feed unit was changed or changed; machine tool axis offset abnormal zero; Axial reverse voids are abnormal; motor operation is abnormal, that is, electrical and control parts are abnormal; mechanical problems, such as screw, bearings, couplings and other...
1.1 In terms of parts, there are machine tool adjustments to improve the precision of CNC lathe machining. First, how to improve the accuracy of CNC lathe machining from the aspect of mechanical adjustment. In terms of machine tool adjustment, it mainly includes these parts, spindle, bed, and inserts, etc., so that the lathe can meet the requirements, improve the accuracy of CNC lathe processing, and must be regularly monitored during the work process, and must be constantly optimized. The lack...
A tool is a tool used for machining in machining, and is also called a cutting tool. The vast majority of cutting tools are machine-based, but they are hand-friendly. Since the tools used in mechanical manufacturing are basically used for cutting metal materials, the term "tool" is generally understood as a metal cutting tool. The choice of tool is one of the important contents in the numerical control processing technology. It not only affects the machining efficiency of the machine tool, but...
The machining center machine is a high-efficiency automatic machine tool composed of mechanical equipment and numerical control system suitable for machining complex parts. CNC machining center is one of the most productive and widely used CNC machine tools in the world. Its comprehensive processing ability is strong. Once the workpiece is clamped once, it can complete more processing contents with higher processing precision. For batch workpieces with medium processing difficulty, its...
In recent years, the rate of numerical control of mechanical manufacturing equipment has increased rapidly. The use of CNC machine tools such as full-function CNC lathes, CNC vertical lathes, vertical machining centers, and horizontal machining centers has become increasingly popular. Compared with ordinary machine tools, CNC machine tools have many significant process features and programming skills, such as the ability to fully tap the performance characteristics of CNC machine tools,...
Often encountered in the production of NC machine tool machining accuracy failure. This kind of fault concealment is strong and difficult to diagnose. The main causes of such failures are the following: 1) Machine feed unit is changed or changed 2) NULL OFFSET error of each axis of machine tool 3) Axial BACKLASH error 4) Motor operation status is abnormal, ie electrical and control part is faulty 5) In addition, the preparation of machining programs, tool selection, and human factors may also...
One of the strengths of the CNC EDM machine is that the diameter of the hole is very small. For example, the diameter of a hole can be as thin as one hair, and when drilling a very small hole on a hard material. CNC EDM machining is particularly suitable for the processing of hard materials with conductive properties. Machining precision round micro-holes generally range from ¢0.3 to ¢3mm. For example, with a 1.0mm diameter electrode, a drilling depth of 700mm can be achieved. The maximum...
Relative to the ordinary machine tool CNC machining center CNC machine tools with high accuracy, dimensional stability, low labor intensity, easy modern management. However, due to improper operation or programming errors, it is easy to cause the tool or tool holder to hit the workpiece or the machine tool. The light will crash the tool and the machined part. In severe cases, the machine tool component will be damaged and the machining accuracy of the machine tool will be lost. Personal injury....
Safe handling of CNC machining centers. (1) Wear protective equipment before operation. (2) The machine tool operator must grasp the function of each button and the precautions for operation. The protective door of the machine tool must be closed before machining. The tools around the machine must be neatly arranged. (3) When operating the machine, pay attention to the contents of the warning signs on various parts of the machine. When the machine tool is powered on, the operator must never...
Using an end mill to machine a workpiece on a CNC machine tool, it can be clearly seen that the tool center movement gauge does not coincide with the contour of the workpiece. This is because the workpiece contour is formed by the movement envelope of the end mill. The center of the end mill is called the cutter location (4, 5 coordinate CNC machine tool is called cutter location vector), and the motion locus of the cutter location represents the trajectory of the cutter. In NC machining,...
I. Preface CNC lathe machining has been applied more and more in modern manufacturing industry, and it has brought out the advantages that ordinary lathe can not match. The CNC lathe processing mainly has the following features: 1.CNC CNC lathe processing drive chain is short, compared with the ordinary lathe spindle drive is no longer a motor belt gear deputy mechanism speed, but the use of horizontal and vertical feed, respectively, by the two servo motor drive movement is completed, no...
Recently, through the bottom-up investigation of the CNC mold industry, CNC machining mold parts are mostly chamber structures with different sizes. For example, automobile molds usually have large dimensions, mold materials are diverse, and the processing of curved surfaces is difficult, and the processing of workpieces during processing will be difficult. There is a problem of “contact and interference” between the machined workpiece and the tool. Fluttering occurs when the machined workpiece...
As a representative of the advanced productive forces of modern manufacturing, CNC machining plays an extremely important role in the industries of machinery, aerospace, and moulds. Since the 1990s, countries in Europe, the United States, and Japan have been competing to develop and apply a new generation of high-speed CNC machine tools, accelerating the pace of development of high-speed machine tools. High-speed spindle unit motor spindle speed 15000 ~ 100000r/min, high-speed and high...
In the numerical control processing, the process route arrangement, processing strategy and tool selection have a great influence on the processing efficiency, processing quality and processing cost. In the past few years, we have been devoting ourselves to research and experiments in this area. We have achieved certain results in improving processing efficiency and reducing tooling costs. The following takes the car crankshaft type forging die and PowerMILL as the programming software as an...
Networked CNC machining is facing one of the most basic and most realistic problems. It is web browsing and publishing of product graphics. Through the three-dimensional graphics published on the Internet, users can intuitively browse product design and processing information to facilitate product prediction, product design, product analysis and product processing. However, the graphics published by the Web are generally in the format of a bitmap, so that the 3D graphics displayed on the client...
The direction of high-speed and heavy-load development of China's railway transportation has increasingly high requirements on the quality of railway axles. Therefore, the production process and equipment requirements for railway axles are continuously increasing. Our factory is one of the main bases for the production of axles of the CSR Group. After several technical transformations, the axle machining production line is gradually adopting CNC equipment. Currently, CNC machine tools account...
When programming, it is important to choose the CNC tool correctly. The general requirements for CNC tools are easy installation and adjustment, good rigidity, high precision, and good durability. Based on this, the cutting performance of the workpiece material, the machining capability of the machine tool, the type of CNC machining process, the cutting amount, and the machine tool are taken into consideration. Numerous factors related to the working range of the numerical control device. 1....
Maschinenfabrik Reinhausen has optimized the CNC machining tool magazine. Tool preparation, intelligent magazine replacement, and a large amount of graphic information on the CNC have become the focus of innovation. Figure 1 Maschinenfabrik Reinhausen processes approximately 8 million parts per year on 30 machine tools, using approximately 9,000 different NC programs for this purpose Maschinenfabrik Reinhausen, together with the Motion Control Business Unit of the Siemens Automation and Drives...
The processing process planning refers to the entire process, and cannot be judged by the nature of a certain process and the processing of a certain surface. For example, some positioning datums need to be processed accurately in the semi-finishing stage and even in the roughing stage. Sometimes, in order to avoid dimensional conversion, some minor surface semi-finishing can also be arranged during the finishing stage. When the machining method and the machining stage of the part surface are...
CNC machining has become more and more widely used in today's machinery manufacturing and processing industry. In particular, economical CNC machine tools are widely used in some enterprises, especially small and medium-sized enterprises, due to their wide range of processing, high efficiency, stable quality, and low prices. The application and development. However, in popularization and application, problems such as long preparation time, large processing errors, accidents or the like are...
Eclipse Mold has set a good example for effective zero-tolerance machining in high-end machining centers. For mold makers, it is strongly hoped that the machining of the mold can reach zero tolerance level of zero tolerance, and Eclipse Mold mold company just proved this fact. The company has a mold processing workshop, which can produce about 140 sets of molds per year, including a considerable number of mold repair services, but this business only accounts for about 40% of its total workload....
After introducing the CNC machining system into the manual production process in the past, the entire processing plant has embarked on a lean manufacturing path and now has a continuous flow production line. Fig. 1 This combination tool module is equipped with a number of pre-adjusted tools. The user only needs to install the tool shank on the tool board and then start the work. Clippard Instrument Laboratories, Inc. is similar to an intermittently-produced processing plant. From the point of...
A major continuous hydrogenation reactor manufacturing company adopted the SIEMENS 840D CNC system to transform a CNC gantry machining center. After the transformation, the machine not only completely restored the original design requirements, but also greatly improved the efficiency of the machine tool, fully embodying the high technology of SIEMENS 840D CNC system. High stability. The CNC Gantry Machining Center was manufactured by WALDRICH COBURG of Germany in 1983. The machine tool is a...
Cutting variable lead threads on a CNC lathe is an important aspect of its characteristics. The variable lead thread has two types of groove width and tooth width. The groove variable width lead thread is easy to process and will not be described. Here we talk about the processing method of tooth variable width lead thread. The workpiece is shown in Fig. 1. The outer diameter of the machined workpiece is 40mm, the bottom diameter is 30mm, the first lead is 10mm, and the lead of the back is...
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