How does a CNC machining center ensure precision for mass-produced products?


Precision is one of the most important indicators to evaluate the processing performance of a CNC machining center. The processing precision and processing errors have a great impact on the quality of the processed parts. How can a CNC machining center ensure the precision of mass-produced products?

The most commonly used processing method in the CNC machining industry is the trial cutting method. The trial cutting method is to try cutting, measure the size, adjust the cutting depth of the tool, cut again, and repeat the process until the required size is achieved. This method can ensure that the error is within a reasonable control range, but it is quite cumbersome and has a low production efficiency. It is mainly used for single-piece and small batch production.

In mass automated production, CNC machining centers can achieve the required size by adjusting the relative positions of the machine tool, fixture, workpiece, and cutting tool in advance, thus achieving the goal of ensuring the precision of batch processing. When processing a large number of workpieces, ensure the safety of the product. The precision should be adjusted as follows:

1. Control the thermal deformation of the process

CNC machining centers are high-speed cutting processing equipment that generate a lot of heat during processing. The heat source should be reduced and isolated, and heat treatment processes should be added to eliminate internal stress.

2. Reduce the transmission error of the transmission chain

The transmission system must adhere to the principle of fewer transmission components, shorter transmission chain, and high transmission accuracy. Using a reduction gear train is an important way to ensure transmission accuracy. The lower the transmission ratio, the closer the transmission torque is to the end. For other transmission components, the precision of the final component must be higher.

3, Reduce tool wear

The tool should be re-sharpened before reaching the wear stage, and properly lubricated with special cutting oil. The tool material must meet the process requirements.

4, Improve the rotational accuracy of bearings

High-precision bearings can be selected for various oil wedge dynamic pressure bearings and static pressure bearings. At the same time, improve the precision of bearing accessories, such as improving the processing accuracy of bearing seat support holes and spindle ear holes to ensure that the spindle rotational accuracy is not reflected in the workpiece.

The size of the processing error directly affects the high or low processing accuracy of the workpiece. The larger the error, the lower the processing accuracy of the product will be, and the smaller the error, the higher the processing accuracy will be. Therefore, it is necessary to reduce processing errors to ensure the accuracy of processed parts.

评论

发表评论

此博客中的热门博文

How to deal with the plastic injection molding raw material is not filled?

图片
Electric injection molding machine in the production of injection mold will encounter the situation of injection molding is not filled, there is a lack of glue at the bone position right Angle and fuse connection, here to share some experience. Analysis of glue injection is not filled: 1. The trapped air in the bone position makes the injection molding machine fill up. 2. The filling of the injection molding machine caused by the glue welding line is not filled. Reason analysis of glue injection is not filled: When the injection molding machine is working, the mold gluing method is two-point gluing, and the injection speed is too fast, which is easy to cause the gas trapped at the right Angle of the bone position and cause the filling dissatisfaction; If the injection speed is too slow, it is easy to fill the fuse at the end of the flow. The solution: Multistage injection molding and position switching. In the first stage, the medium speed filling channel was used to pass
阅读全文

Control of Injection Molding Parts Processing Temperature

图片
There are many kinds of plastic, many plastic materials melting time are different, because the plastic does not have a specific melting point, the so-called melting point is a melting state of the temperature segment, the structure and composition of the plastic molecular chain is different, so the impact on its fluidity is also different, then in the production of injection parts manufacturers in the injection parts processing temperature control is also very important. 1. Mold temperature Some plastic materials due to high crystallization temperature, slow crystallization speed, need higher mold temperature, some due to control size and deformation, or the need for demoulding, to higher temperature or lower temperature, such as PC generally requires more than 60 degrees, and PPS in order to achieve a better appearance and improve fluidity, mold temperature sometimes needs more than 160 degrees, Therefore, the mold temperature has an inestimable effect on improving the appearanc
阅读全文