Technical requirements for sheet metal processing
The material is 1Crl8Ni9Ti steel plate, the thickness is 82mm, the curvature of inner contour is not only changeable but also smooth and excessive, and the most strict dimension tolerance is 35-0.1mm.
For the sheet metal parts, it is necessary to determine the processing plan according to the different specifications. In the professional sheet metal processing plant, there are several typical selection methods for the processing technology.
1. The structural features of sheet metal parts
(1) Name: diversion plate.
(2) structural characteristics: the inner surface of machining is irregular curve profile structure.
2. Analysis and comparison of various processes for the 16 production tasks of the diversion board.
(1) die stamping
16 pieces are processed only. Although the mold can ensure the accuracy of the internal contour, but the machining of the male die with 1 holes is short and easy to break, the cost of the mold itself is high, and the processing cycle is long and uneconomical.
(3) high pressure water cutting
Seals, cutting heads and other consumables have short service life and high cost.
(2) EDM wire cutting
The accuracy and the smooth surface of the surface can be guaranteed. But first of all, we need to work out the hole through the wire. The machining speed is too slow. It is unreasonable (Note: the linear section of WEDM is equivalent to the accuracy and roughness of laser cutting. But if the free curve or irregular curve is processed, the accuracy and roughness are not as good as laser cutting.
(4) laser cutting
Because its NC program is transformed by the CAD graphics - geometric map - the PLC control program based on the nonuniform rational B spline curve, there is no human error, and the precision machine tool is guaranteed by the precision machine tool, the error in the mechanical precision is in the + 0.02mm, and the error of the environment is about + 0.05mm in fact because of the environmental reasons. And the material can be arranged by software. The material utilization rate is usually equal to 80%. The machining accuracy, cutting surface roughness, heat affected zone and processing speed can meet the requirements.
3, process analysis and selection of process plan
According to the parts drawing and structural features of the above parts, the following processing schemes are available:
(1) die stamping;
(2) electrical discharge wire cutting;
(3) high pressure water cutting;
(4) laser cutting.
标签:   钣金加工 钣金 加工