Die base on punching machine

Abstract

A die base on a punching machine comprises a punching unit assembly and is characterized in that the punching unit assembly arranges dies in an array combination mode. The dies on the punching unit assembly are distributed towards the periphery with a punching power source as a center and arranged in an array combination mode. A die array is combined freely along a girder feeding direction or along a direction perpendicular to the girder feeding direction. The array combination type die base has the advantage of being compact in structural size, capable of reducing punching slanting bearing pressure, simple and stable in die selecting, good in material pressing effect and the like. By means of an automatic control system, stable punching core guarantee is provided for improvement of performance indexes such as nominal pressure, punching precision, production efficiency of an automobile girder numerical control punching production line.

Description

technical field [0001] This project involves the mold library structure of the punching machine of the CNC punching production line for automobile longitudinal beams. Background technique [0002] The mold library of the punching machine of the automobile longitudinal beam CNC punching production line is equipped with a variety of molds that meet the requirements of the automobile longitudinal beam drilling operation. The mold is automatically selected by the numerical control system, and the punching power source is used to complete the longitudinal beam punching operation. At present, the mold library of the punching machine of the CNC punching production line for automobile longitudinal beams at home and abroad is used as the stamping core, mainly composed of a stamping unit, a mold changing unit and a pressing unit; most of the stamping units adopt single-row die arrangement, double-row die arrangement or single-double The arrangement of molds arranged in combination alo...

AI Technical Summary

Problems solved by technology

The existence of the eccentric load moment makes the main engine need to provide a mechanism to resist the eccentric load moment. The greater the eccentric load moment, the higher the cost of this mechanism; the length of the mold library will also increase the width of the main engine, making the structural size of the main engine bed Therefore, the weight will be increased, which will directly affect the overall structural performance and the improvement of the operating speed of the host.

The mold change unit adopts the mold selection action that each mold position corresponds to a single-position cylinder. In view of the large number of mold positions, the number of cylinders is large; the piston rod of the cylinder is directly connected with the impact pad, and the cylinder body is seriously damaged. There are many pipeline layouts, cumbersome electrical control, and equipment debugging and maintenance are very difficult; the pressing unit relies on the bed of the punching main machine, and the rotating shaft is often fixed on the main machine bed, and the pressing plate swings and presses the material with the movement of the mold library. In this way, because the binder plate is in a swinging state, it cannot ensure that the binder surface of the binder plate is in contact with the effective surface of the longitudinal beam workpiece surface. During the pressing process, there is a lateral driving force on the longitudinal beam, and the pressing effect is poor and easy. Affects the punching accuracy of the longitudinal beam; at the same time, the reset action of the binder plate is realized by the reset cylinder or air bag. Due to the frequent swing action of the binder plate, the reset cylinder or air bag is easily damaged and affects the reset effect

The existing mold library structure can only be installed on the open C-shaped bed, and moves along with the main machine in the vertical feeding direction for punching operations. Due to the heavy weight of the main machine and the mold library, the operation of the main machine in this direction of motion is difficult. Performance cannot be improved

At present, the material of domestic automobile longitudinal beams is developing towards the trend of high-strength steel plates, and the tensile strength and yield strength of the sheets are constantly increasing, which makes the stamping nominal pressure of the automobile longitudinal beam CNC punching machines also continue to increase. Existing molds The shortcomings of the library structure become more and more obvious: problems such as large eccentric load moment, unstable mold selection structure, poor pressing effect, and inability to improve the running performance along the vertical feeding direction, which restrict the nominal pressure and punching accuracy of the punching machine , production efficiency and other performance indicators

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