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What errors may occur during CNC machining and CNC machining​?

 CNC machining and numerical control machining are a method to control the movement of machine tools and the production process of machining through computer digitization and information digitization. It is an intelligent numerical control device developed as an economical, high-speed, reliable, multi-functional, intelligent, and open structure. CNC machining is also an important indicator that can measure the continuous level and comprehensive ability of a safety technology, as well as the degree of modernization of related science and technology capabilities, especially in aviation, biology, medical and other high-tech cultural industries, and it is also a powerful indicator. reflect. So, what errors may occur during CNC machining and CNC machining? Let us understand together:   The use of approximate machining motion or approximate tool contours causes errors in the CNC principle of machining. The reason why it is called machining principle error is because of the error in machining

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What are the rules for metal stamping die scrap tube?

The Purpose Standardize the management of the scrapping of the company's metal stamping dies, prevent the loss of company assets, and formulate this system specially. Scope of application It is suitable for the management of the company's scrap molds. Definition If the molds listed in the assets of the company fall under one of the following circumstances, the use management department may apply for scrapping. 1. Molds that exceed the specified service life. 2. The mold is severely damaged by accidents or accidents, and molds that cannot be repaired or have no repair value. 3. Metal stamping dies that have not reached the service life, but due to safety, quality, efficiency and other issues, the repair still fails to meet the minimum requirements of the customer's product process or affects the production safety and efficiency. 4. Product customers have stopped placing orders or have not placed orders for molds in several years. 4. Responsibilities 1. Responsibilities of th

China Hardware Factory Has Made a Comprehensive Summary of CNC 5-Axis Programming

Keywords:CNC 5-Axis

This article is suitable for students who have mastered the basic theoretical knowledge of three-axis programming and five-axis programming, and try to continue to learn the five-axis programming in depth. Five axis programming core three parameters: drive method, projection vector, knife axis.

Driving method: The common methods include streamline (more intelligent), surface (set cutting direction, step moment, cutting mode and other parameters), boundary, etc. After the driving method is determined, the driving geometry is selected, and the driving geometry is used to generate the first “virtual tool path”, and the rationality of the tool path is observed, and then the optimization is done.

 

Projection vector: Discusses how the virtual tool path is projected onto the workpiece geometry after it is first generated. The projection affects the quality of the final tool path on the workpiece surface, but has nothing to do with tool attitude. If the projection is not correct, the tool path will show confusion such as zigzag lines.

 

Generally speaking, the projection vector options are less, often selected, knife axis (knife path along the direction of the knife axis projection tool surface), vertical driver (driving geometry), specified vector, the above projection principle is simple to understand, easy to operate.

 

Tool axis: discuss the processing, the tool in what attitude in the final knife path “walk”, tool attitude can be divided into: fixed tool axis, an axial change, two axial changes, etc., there are many options of the tool axis, the following is classified.

 

Away from the straight line, the application of open area surface or rotary surface, each path of the tool attitude has a direction change, the tool attitude to a straight line, with the change of processing direction, the path of the tool. This approach is limited if there is artifact interference.

 

Away from the point, it is best to use a closed area, each path of the tool posture has two direction change, and the attitude change is large, this method will have limitations.

 

Vertical drive, depending on the choice of the situation, generate tool will always vertically the gesture of dao road, if it is straight bevel, tool posture and fixed knife road and tidy, if it is a curved surface, cutting tool posture will change at any time, and cannot be specified tilting Angle, interference occurs if the cutting tool and workpiece structure, unable to adjust the cutter attitude, this method will be limited.

 

Compared with the driver body, it is more flexible than the vertical driver body. If the machining surface is curved, the posture of the tool during machining will change at any time, and the roll Angle can be specified. If there is interference between the tool and the workpiece structure, the roll Angle can be adjusted to avoid.

 

4 axis, perpendicular to the driver/relative to the driver, the application of closed areas such as the structure of the rotary body, generate the whole cycle movement of the knife path, can change the roll Angle, rake Angle, etc., this method is simple and convenient.

 

Drive side blade, the use of oblique cutting tool side blade inclined wall, side edge direction is designated as “upward (purpose is to make the cutter attitude up), if the wall is straight bevel, cutter profile is changeless, wall surface, cutting tool processing attitude will change, at the same time, you can specify a tilting Angle to continue to change the posture, the method is relatively flexible.

 

Profile milling, used to milling the inclined straight wall, using the known bottom surface, automatically find out the inclined wall to be processed. Can not mill surface (milling surface with side edge drive), and side edge drive is very similar to the generation of plane milling is similar to a single knife path, but can use the transformation out of multiple knife path.

 

Finally, multi-axis programming is mainly based on the surface structure of the workpiece and processing requirements, with the model of five-axis machine tool, avoid interference with the workpiece, optimize the tool posture, and reasonably generate the machining tool path. Programming itself is not difficult to master, but processing technology requirements are high.

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