고정밀 CNC 프레스 브레이크의 정밀 요구 사항
(1) Accuracy, which mainly refers to bending accuracy, which is very important because it determines whether to use CNC or NC. Generally, the bending accuracy is ±1°, and if it cannot be changed, then should choose the CNC press brake
(2) Mold, a conventional mold, its deviation per foot is about ±0.001 inches, and its total length deviation is not more than ±0.005 inches. For fine grinding molds, the size requirements are higher, which are 0.0004 and 0.002. Therefore, the precision grinding of the mold is more suitable for the CNC 벤딩 머신. Conventional molds are more suitable for NC bending machine.
(3) The CNC system of the Press brake, generally speaking, will use E200, DA41S, DA52S, DA53T, DA58T and DA66T.
(4). What are the V groove and V10 of the CNC bending machine?
For CNC bending machines, the V-slot means that the slot of the lower die is V-shaped, and V10 means that the slot width is 10mm.
What are the high-precision CNC press brake in the elevator car 굽힘 공정?
The elevator car is mainly composed of door panels, wall panels, three-piece sets (front wall, control wall, door light beam, ceiling decoration top and other components.
The material is generally 1.0 ~ 2.0mm stainless steel plate or cold-rolled carbon steel plate, processing technology The route is generally cutting by a shearing machine, then punching or punching directly by laser, and finally bending and forming.
In the bending process, in order to ensure product quality, it is necessary to set extreme values such as the minimum bending radius, the minimum bending straight edge, and the minimum hole edge distance. Different plates have different minimum bending radii due to their different elongation rates.
The minimum bending straight edge refers to the distance from the boundary of the sheet to the bending edge. If its length is too small, it may cause bending deformation and even damage the mold. The distance is generally h> 2t.
Hole margin refers to the process route of punching first and then bending. If the position of the hole is in the bending deformation zone, the hole will deform during bending. When t ≤ 2mm, the hole margin S ≥ t+r; when t ≥ 2mm, the hole margin S ≥ 1.5t+r.
The bending sequence of the CNC press brake
굽힘 공정 경로를 공식화할 때 굽힘 순서도 중요한 내용입니다. 굽힘 순서가 잘못되면 부품의 성형 크기에 큰 편차가 발생할 수 있으며 간섭이 있어도 굽힘이 불가능할 수 있습니다.
In the bending process, the following four basic principles are generally followed: ⑴Bending from the inside to the outside; ⑵Bending from small to large; ⑶Bending special shapes first, and then bending general shapes; The process has no influence or interference.
굽힘의 일반적인 문제 및 솔루션
성형 크기가 도면과 일치하지 않습니다.
The main reasons for the inconsistency of the workpiece forming size with the drawing are the error of the cutting size, the inaccurate bending positioning and the cumulative error of multiple bending.
The solution is: adjust the bending coefficient, recalculate the unfolded size; adjust the positioning; select a reasonable positioning benchmark to eliminate the accumulated error. If the cutting size error and the bending cumulative error are within the allowable range, the forming size can be guaranteed first, and the error can be accumulated on the non-assembly side that has no effect on the workpiece.
굽힘 각도 편차
The bending angle of the workpiece is too large or too small to cause bending angle deviation, mainly due to improper V port of lower die, improper setting of die springback compensation parameters, and mismatch of press brake pressure.
해결책은 벤딩 몰드 표를 참조하여 적절한 하부 몰드를 선택하고 리바운드 보상 값과 벤딩 머신의 압력을 조정하는 것입니다.
굽힘 가장자리에 균열
The main reasons for the cracks on the bending edge include too small bending radius, parallel plate texture and bending line, blank burrs facing outward, and poor material plasticity.
The solution is to increase the bending radius and use a high-precision CNC bending machine or grooving; change the opening and layout direction of the workpiece; change the direction of the burr and place it on the inner corner of the workpiece; replace the plastic more Good material.