CN102963029A

CN102963029A - Elastic deformation workpiece pressing method of press machine

Info

Publication number: CN102963029A
Application number: CN2012105292651A
Authority: CN
Inventors: 罗斌; 罗云; 樊毅; 胡晓; 呙永红
Original assignee: Chongqing Mechanical and Electrical Design Institute
Current assignee: Chongqing Mechanical and Electrical Design Institute
Priority date: 2012-12-11
Filing date: 2012-12-11
Publication date: 2013-03-13
Anticipated expiration: 2032-12-11
Also published as: CN102963029B

Abstract

The invention discloses an elastic deformation workpiece pressing method of a press machine and belongs to the technical field of numerical control machine tools. A detection signal is fed back to a processor through a pressure sensor and a displacement sensor, the processor controls an electrical motor to drive a pressing rod to move vertically by determining the received detection signal, an elastic deformation workpiece can be pressed accurately, manual observation errors are reduced, and the qualified pressing of the elastic deformation workpiece can be guaranteed.

Description

Forcing press strain workpiece drawing method

Technical field

The invention belongs to the numerical control machine tool technique field, particularly relate to a kind of forcing press strain workpiece drawing method.

Background technology

Servo-pressing machine is for adopting servomotor to drive the forcing press of control, and servomotor presses down process to forcing press can play the quick and characteristics flexibly of control.It is pressure and volume under pressure or displacement of pressing head that forcing press presses down parameter the most key in the process, but, existing servo-pressing machine does not but press down device or the means that pressure in the process and displacement relation are monitored to whole, namely lack the quantification monitoring that integral body is pressed down process, cannot judge so whether the line pressure shift relation in the process is normal, whether whole process is normal, weakened the ability of servo-pressing machine to machining accuracy and quality control.

For the flexible workpiece that can be out of shape, very large to its compacting difficulty of carrying out standard, flexible because workpiece itself is with, the situations such as not in place are suppressed in therefore very easy appearance, have influence on the machining accuracy of strain workpiece.

Summary of the invention

Because the defects of prior art, technical problem to be solved by this invention provides a kind of drawing method that is applicable to the strain workpiece, can improve the precision of compacting strain workpiece.

For achieving the above object, the invention provides a kind of forcing press strain workpiece drawing method, be provided with pressure sensor below the depression bar of digitally-controlled press machine, the output of described pressure sensor connects the first input end of processor; The second input of described processor is connected with the output of displacement transducer; The first output of described processor connects the input of servomotor; May further comprise the steps:

Step 1, processor send signal to servomotor, and servomotor drives depression bar and moves downward, and depression bar moves downward by the pressure head that pressure sensor drives digitally-controlled press machine;

Step 2, pressure sensor send the pressure signal that detects to processor;

The pressure signal that step 3, basis receive, processor sends signal to servomotor, and servomotor drives depression bar and moves downward, and depression bar moves downward by the pressure head that pressure sensor drives digitally-controlled press machine;

Step 4, displacement transducer send the displacement signal that detects to processor;

The displacement signal that step 5, basis receive, processor sends signal to servomotor, and servomotor drives depression bar and moves downward, and depression bar moves downward by the pressure head that pressure sensor drives digitally-controlled press machine.

Further, comprise that also processor sends a signal to servomotor, the control servomotor drives the step that depression bar moves upward.

Further, described processor also is connected with host computer; The second output of described processor connects the input of described host computer; The output of described host computer connects the 3rd input of described processor; Comprise that also host computer sends the step that instruction sends data to host computer to step and the processor of processor.

The invention has the beneficial effects as follows: the present invention carries out precompressed to the strain workpiece, press-fit in the process by the monitoring to pressure and displacement whole, can suppress the strain workpiece accurately, reduce the error that artificial observation occurs, can guarantee the qualified compacting of strain workpiece.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention.

Fig. 2 is schematic flow sheet of the present invention.

The specific embodiment

The invention will be further described below in conjunction with drawings and Examples:

As shown in Figure 1, a kind of control system for the compacting of strain workpiece, below the depression bar of digitally-controlled press machine, be provided with pressure sensor 1, the output of pressure sensor 1 connects the first input end of processor 2, the second input of processor 2 is connected with the output of displacement transducer 3, the first output of processor 2 connects the input of servomotor 4, and the second output of processor 2 connects the input of host computer 5; The output of host computer 5 connects the 3rd input of described processor 2, and processor 2 adopts chip microcontroller in the present embodiment.

As shown in Figure 2, a kind of forcing press strain workpiece drawing method may further comprise the steps:

Step 1, processor 2 send signal to servomotor 4, and servomotor 4 drives depression bar and moves downward, and depression bar moves downward by the pressure head that pressure sensor 1 drives digitally-controlled press machine;

Step 2, pressure sensor 1 send the pressure signal that detects to processor 2;

Step 3, basis receive different pressure signals, the different distance of processor 2 control ram movement.Processor 2 sends signal to servomotor 4, and servomotor 4 drives depression bar and moves downward, and the pressure head that depression bar drives digitally-controlled press machine by pressure sensor 1 moves downward workpiece is carried out precompressed;

Step 4, processor 2 send a signal to servomotor 4, and control servomotor 4 drives depression bar and moves upward, thereby so that pressure head rises, stop the compacting to workpiece;

Step 5, displacement transducer 3 send the displacement signal that detects to processor 2;

Step 6, owing to tend to the certain distance that rebounds according to after the elastic workpiece compacting, therefore adopt displacement transducer 3 to detect the bounce-back distance of elastic workpiece, see whether it suppresses and put in place, according to receiving different displacement signals, the different distance of processor 2 control ram movement.Processor 2 is judged the pressure head of digitally-controlled press machine and the distance of workpiece, and processor 2 sends signal to servomotor, and servomotor 4 drives depression bar and moves downward, and depression bar moves downward by the pressure head that pressure sensor 1 drives digitally-controlled press machine.

After step 7, compacting are finished, processor 2 sends a signal to servomotor 4, control servomotor 4 drives depression bar and moves upward, thereby so that pressure head rises, stop the compacting to workpiece, processor 2 judges whether to need to continue pressing component, when needs continue pressing component, and execution in step one cyclic pressing workpiece; When not needing to continue pressing component, compacting finishes.

Comprise also that in pressing process host computer sends the step that instruction sends data to host computer 5 to step and the processor 2 of processor 2, processor 2 sends pressure data and the displacement data that detects to host computer 5 in order to carry out real time monitoring and record after receiving the instruction of host computer 5.

More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art need not creative work and just can design according to the present invention make many modifications and variations.Therefore, all in the art technical staff all should be in the determined protection domain by claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.

Claims

1. a forcing press strain workpiece drawing method is provided with pressure sensor (1) below the depression bar of digitally-controlled press machine, and the output of described pressure sensor (1) connects the first input end of processor (2); The second input of described processor (2) is connected with the output of displacement transducer (3); The first output of described processor (2) connects the input of servomotor (4); It is characterized in that may further comprise the steps:

Step 1, processor (2) send signal to servomotor (4), and servomotor (4) drives depression bar and moves downward, and depression bar moves downward by the pressure head that pressure sensor (1) drives digitally-controlled press machine;

Step 2, pressure sensor (1) send the pressure signal that detects to processor (2);

The pressure signal that step 3, basis receive, processor (2) sends signal to servomotor (4), and servomotor (4) drives depression bar and moves downward, and depression bar moves downward by the pressure head that pressure sensor (1) drives digitally-controlled press machine;

Step 4, displacement transducer (3) send the displacement signal that detects to processor (2);

The displacement signal that step 5, basis receive, processor (2) sends signal to servomotor, and servomotor (4) drives depression bar and moves downward, and depression bar moves downward by the pressure head that pressure sensor (1) drives digitally-controlled press machine.

2. forcing press strain workpiece drawing method as claimed in claim 1 is characterized in that: comprise that also processor (2) sends a signal to servomotor (4), the step that control servomotor (4) drive depression bar moves upward.

3. forcing press strain workpiece drawing method as claimed in claim 1, it is characterized in that: described processor (2) also is connected with host computer (5); The second output of described processor (2) connects the input of described host computer (5); The output of described host computer (5) connects the 3rd input of described processor (2); Comprise that also host computer () sends the step that instruction sends data to host computer (5) to step and the processor (2) of processor (2).