What are the effects of machining technology on machining accuracy of parts

In the processing of parts in the link, the machining process of parts processing accuracy caused very important harm, this harm is generally increased to parts processing links in the form of immediate. Mechanical processing technology is an engineering project, in this engineering project, there are many components, in this part of the components of the association link, composed of the equipment to carry out the processing of this huge system software. Only deep search for the cause of the disease, and carry out a detailed analysis of it, can ensure the precision of parts in the whole process of processing.

First, the detailed introduction of the relevant mechanical processing technology

Mechanical processing technology refers to the process steps in the process of the link, according to a certain method to change the specifications of the manufacturing target, geometric shapes, characteristics and the current position, etc., to promote the production of manufacturing targets to complete the finished products or semi-finished products processing too much. In which the machining process can be mainly divided into two levels: process steps and process technical specifications. The technical specification of the process is mainly to write the relevant content of the process steps in the document, convenient to view and reference. And the process step is essentially the whole process of implementing measures of mechanical processing technology. For example, the standard situation of machinery and equipment, human literacy and the number of goods and other processing links involved in the data to develop clear.

Second, parts processing technology analysis

To analyze the content of parts processing technology can from parts processing link, according to the heat treatment process, milling insert, spline shaft, gear hobbing, heat treatment process, the universal and gear grinding, the seven parts processing link to carry out related to its analysis on the level of processing technology, therefore to enhance your understanding of the parts processing process of the new technology.

1, heat treatment process: here the process flow of heat treatment process has become the basic heat treatment process, mainly according to the quenching opening that is the reliability of the material to improve, reduce the probability of deformation in the aftermath of the work.

2, milling: milling process is mainly calibration grip left, smooth right inner hole, drilling to? 25mm; Turn around, live on the head of the four-claw, calibrate the inner hole and the inner hole vibration ≤0.02mm and clamp.

3, insert the internal spline shaft: hold the left side, calibrate the right inner hole and inner hole vibration ≤0.02mm, mark the Angle should be consistent with the higher parts, then clamp, then insert the internal spline shaft until it meets the requirements of the design drawings.

4, hobbing: this process is mainly the calibration and clamping process as above, hobbing wear, grinding and polishing.

5, heat treatment process: in the processing process, the nitriding, heat treatment process to achieve the requirements of the drawing, at the same time, in the process, in order to ensure the surface of each part of the mutual position accuracy, symmetrical processing capacity, home less deviation, should choose unified calibration standards and calibration clamp.

6, all-round grinding: this process stipulates that the four claw clamp head live, clamp to the right, calibration left inner hole and inner hole vibration ≤0.02mm; The highest point of this process is in line with the mark commonly used in milling and should be clamped.

7, transmission gear grinding: the provisions of the 1:400 mandrel live, tighten, calibrate the tooth position, the transmission gear grinding and drawing on the provisions can be rechecked into the library.

Third, the harm level of machining process to machining accuracy of parts

1, mechanical processing process, thermal deformation of parts processing accuracy harm

This link on the precision of parts processing relativity and many other levels, the level is more serious. Because in the construction link of a project here, the operability of the actual operation staff of parts is small, just before processing, some machinery and equipment, special tools and fixtures as far as possible in accordance with the demand to put, but in the heating and shaping link, make the corresponding technical adjustment has a very big difficulty. Because it is to carry out high temperature shaping of parts, so in this link, there is also a product workpiece in thermal deformation, numerical control blade in thermal deformation and numerical control lathe in thermal deformation and other conditions, this situation is to the precision of parts processing caused certain harm.

2, mechanical processing process, geometric deformation of parts processing accuracy harm

CNC lathe, fixture, special tools and product workpiece four parts together produced the mechanical processing technology this system software, each link of the wrong operation will cause the mechanical processing technology system software problems. Nc lathe spindle radial shaking and bearing axial are harmful to the machining accuracy of parts, because in the processing, the need for processing different kinds of parts is different, if in the processing, CNC lathe parts is wrong, the direction of the jig error occurs, the product of artifacts and artifact irregularities such as status, Will cause the processing of parts to produce geometric deformation. Therefore, in the whole process of parts processing, it is necessary to pay attention to the harm of geometric deformation to parts accuracy.

3, mechanical processing process, bearing deformation of parts processing accuracy harm

Parts in the whole process of processing, to bear the interaction force increased by each level, especially in the drilling link, processed parts have to bear the force, cutting speed and clamping force. Under the action of this force, some changes have taken place in parts, parts of the appearance, specifications, size and good between each other and the specification of the design drawing there are differences, that is, parts due to assume too much interaction caused by the shape of processing and the formulation of provisions in the middle of a certain difference. In order to deal with the problem of compression deformation of parts and improve the precision of parts processing, the actual operation staff must carry out a specific analysis on this aspect and formulate the corresponding treatment and prevention measures.