CN2811980Y - Stretching machine - Google Patents

Stretching machine Download PDF

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Publication number
CN2811980Y
CN2811980Y CN 200320117788 CN200320117788U CN2811980Y CN 2811980 Y CN2811980 Y CN 2811980Y CN 200320117788 CN200320117788 CN 200320117788 CN 200320117788 U CN200320117788 U CN 200320117788U CN 2811980 Y CN2811980 Y CN 2811980Y
Authority
CN
China
Prior art keywords
control
oil cylinder
machine frame
displacement
stretcher
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN 200320117788
Other languages
Chinese (zh)
Inventor
朱钒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FOSHAN CONSTANT HYDRAULIC MACHINERY Co Ltd
Original Assignee
FOSHAN CONSTANT HYDRAULIC MACHINERY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FOSHAN CONSTANT HYDRAULIC MACHINERY Co Ltd filed Critical FOSHAN CONSTANT HYDRAULIC MACHINERY Co Ltd
Priority to CN 200320117788 priority Critical patent/CN2811980Y/en
Application granted granted Critical
Publication of CN2811980Y publication Critical patent/CN2811980Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a stretcher which comprises a stretcher machine frame, a main oil cylinder arranged above the stretcher machine frame to drive a concave die to move downwards, and an edge pressing oil cylinder provided with an edge pressing ring and arranged below the machine frame. The stretcher is characterized in that a piston displacement detecting device of the main oil cylinder, a control device and a proportional valve which control the oil pressure of the edge pressing oil cylinder are arranged on the stretcher machine frame. The displacement signal output end of the displacement detecting device is connected with the displacement signal input end of the control device, and the electrical signal output end of the control device is connected with the electrical signal input end of the proportional valve. Compared with the prior art, the utility model has the advantages that stepless changeable edge pressing force control can be realized for realizing the stretch forming of a work piece in the state of ultra-low stretch, and the quality of products can be improved.

Description

A kind of drawing machine
Technical field:
The utility model relates to a kind of drawing and forming machinery with automatic stepless voltage regulation function that is used for civilian vessel.
Background technology:
In goods stretched, pressure-pad-force was one of most important process control parameter in the sheet forming, also is the important control means in the sheet forming.Major defects such as wrinkling, the drawing crack in the forming process all can be eliminated and reduce by the adjustment of pressure-pad-force.For drawing process, pressure-pad-force must suitably if pressure-pad-force is too big, then can make the bottom or the flange portion cracking of workpiece; Pressure-pad-force is too little, and then workpiece creases easily and twists.So common way is, when examination stretches, always constantly adjust pressure-pad-force until can pulling out specification product, and pressure-pad-force not too big till.Because be subjected to the restriction of equipment, in currently used drawing process, the pressure-pad-force in the drawing process does not change with stretching travel, that is to say that at whole stretch section, pressure-pad-force is constant.For the shaping of civilian vessel, its product symmetry is better, along with the difference of stretching travel, adopts pressure variable edge force control, can improve quality of item, reduces defective.
Summary of the invention:
Goal of the invention of the present utility model be to provide a kind of can implement stepless pressure variable edge force control, to realize that workpiece is carried out drawing machine stretch forming, that can improve the quality of products under the ultralow stretching.
The utility model is to realize like this, comprise the drawing machine frame, be arranged on drawing machine frame top and drive the master cylinder that die moves downward, the flanging oil cylinder that has blank holder that is arranged on the frame below, its special feature is that the proportioning valve that is provided with a main oil cylinder piston displacement detector, control device and control flanging oil cylinder oil pressure on the drawing machine frame constitutes, the displacement signal output terminal of displacement detector links to each other with the displacement signal input end of control device, and the electrical signal of control device links to each other with the electric signal input end of proportioning valve.During work, master cylinder is descending at first fast, transfers draw speed to and begins drawing process when treating near mould, at this moment, control device begins to accept the stretching displacement electric signal that displacement detector sends, and by pre-set programs, according to stretching displacement not in the same way proportioning valve send different voltage signals, control and produce different oil liquid pressures, reach the variation of control pressure-pad-force, stretching finishes, the master cylinder quick return, and the oil cylinder of flanging simultaneously goes upward to the original position.Mould number storage be set and be pressed to the rule that displacement, pressure-pad-force change can by the man-machine interface on the control device, is convenient to directly call next time, can adopt different control laws for different moulds.
Here, displacement detector by rotary encoder, be fixed on gear on the rotary encoder, constitute with gearing mesh tooth bar together, tooth bar is fixed on the drawing trestle, rotary encoder and master cylinder link together.Like this, when master cylinder moved, rotary encoder also moved along with master cylinder, and gear rotates along tooth bar, thereby measured the displacement of master cylinder, and rotary encoder converts displacement to electronic signal transmission to control device again.
The utility model compared with the prior art, have can implement the control of stepless pressure variable edge force, to realize that workpiece is carried out advantage stretch forming, that can improve the quality of products under the ultralow stretching.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Embodiment:
Now in conjunction with the accompanying drawings and embodiments the utility model is described in further detail:
As shown in the figure, the utility model comprises drawing machine frame 1, be arranged on drawing machine frame 1 top and drive the master cylinder 3 that die 2 moves downward, be arranged on the flanging oil cylinder 5 that has blank holder 4 of frame 1 below, its special feature is to be provided with a main oil cylinder piston displacement detector 6 on drawing machine frame 1, the proportioning valve 8 of control device 7 and control flanging oil cylinder oil pressure constitutes, the displacement signal output terminal of displacement detector 6 links to each other with the displacement signal input end of control device 7, the electrical signal of control device 7 links to each other with the electric signal input end of proportioning valve 8, displacement detector 6 is by rotary encoder 9, be fixed on the gear 10 on the rotary encoder 9, the tooth bar 11 that meshes together with gear 10 constitutes, tooth bar 11 is fixed on the drawing trestle 1, rotary encoder 9 links together with master cylinder 3, and control device 7 is one to have the microprocessor of touch-screen.

Claims (2)

1, a kind of drawing machine, comprise the drawing machine frame, be arranged on drawing machine frame top and drive the master cylinder that die moves downward, the flanging oil cylinder that has blank holder that is arranged on the frame below, it is characterized in that the proportioning valve that is provided with a main oil cylinder piston displacement detector, control device and control flanging oil cylinder oil pressure on the drawing machine frame constitutes, the displacement signal output terminal of displacement detector links to each other with the displacement signal input end of control device, and the electrical signal of control device links to each other with the electric signal input end of proportioning valve.
2, drawing machine according to claim 1, it is characterized in that displacement detector by rotary encoder, be fixed on gear on the rotary encoder, constitute with gearing mesh tooth bar together, tooth bar is fixed on the drawing trestle, and rotary encoder and master cylinder link together.
CN 200320117788 2003-11-03 2003-11-03 Stretching machine Expired - Lifetime CN2811980Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200320117788 CN2811980Y (en) 2003-11-03 2003-11-03 Stretching machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200320117788 CN2811980Y (en) 2003-11-03 2003-11-03 Stretching machine

Publications (1)

Publication Number Publication Date
CN2811980Y true CN2811980Y (en) 2006-08-30

Family

ID=36938370

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200320117788 Expired - Lifetime CN2811980Y (en) 2003-11-03 2003-11-03 Stretching machine

Country Status (1)

Country Link
CN (1) CN2811980Y (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100443211C (en) * 2007-08-16 2008-12-17 浙江科技学院 Drawing die based on variable blank holderforce control
CN105312384A (en) * 2015-11-24 2016-02-10 佛山市康思达液压机械有限公司 Multifunctional combined hydraulic machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100443211C (en) * 2007-08-16 2008-12-17 浙江科技学院 Drawing die based on variable blank holderforce control
CN105312384A (en) * 2015-11-24 2016-02-10 佛山市康思达液压机械有限公司 Multifunctional combined hydraulic machine

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CX01 Expiry of patent term

Expiration termination date: 20131103

Granted publication date: 20060830

C17 Cessation of patent right