Control method for preventing die from being damaged during pressing of automatic hydraulic machine

Abstract

The embodiment of the invention discloses a control method for preventing a die from being damaged during pressing of an automatic hydraulic machine. The control method comprises the following steps that 1, an upper die descends till a lower die descends to the place; 2, according to the value relation between S2 and S3, the value relation between P and P1 and the value relation between T and T1, three pressing states of continuous pressing, pressing interruption and pressing completion are obtained through division, and according to S2 and S1, P and P2 and pressing state division, the action of die sleeve descending, the action of die sleeve stopping and the simultaneous actions of die sleeve stopping and giving of an alarm are carried out. By means of progressive comparison of the relative displacement S2 of the upper die and a die sleeve, the main cylinder real-time pressure P and pressing time T, the action of the die sleeve is controlled through comparison results, descending of the die sleeve in the whole pressurization process can be effectively controlled, the green brick density is uniform from top to bottom, and the product percent of pass is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of application and control of an automatic hydraulic press system, and in particular relates to a control method for preventing mold damage during pressing by an automatic hydraulic press. Background technique [0002] prior art structures such as figure 1 As shown, the upper part of the mold liner is designed with an obviously thinner position, the purpose is to facilitate the disassembly and assembly of the mold liner. It is easy to damage when the force is too high, and you should avoid applying pressure here during normal pressing. Mold lower platen 4 is located at the lower end of lining plate 3, and lower mold 5 cooperates with upper mold 1, produces pressure to the upper and lower end faces of brick adobe. [0003] The control method of the position of die sleeve 6 when existing automatic hydraulic press presses, as figure 2 As shown, after the start, the upper mold 1 begins to descend at the spee...

AI Technical Summary

Problems solved by technology

[0006] (1) The operator needs to set the speed, displacement and lowest position of the die set 6 based on experience, which is prone to errors and requires high requirements for the operator

[0007] (2) In this control method, if the parameters of the die set 6 are not set properly, it will easily lead to an unreasonable drop of the die set 6, thereby affecting the quality of the adobe

[0008] (3) If the parameters of the mold casing 6 are not set properly in this control method, it is easy to cause the brick to be pressed and formed at the mouth of the mold cavity or outside the mold cavity, thereby causing damage to the upper end of the lining plate 3 of the mold cavity

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