CN1385263A

CN1385263A - Closed stamping hydraulic mould frame device

Info

Publication number: CN1385263A
Application number: CN 02132418
Authority: CN
Inventors: 梁继才; 黄良驹; 付沛福; 李义
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2002-06-05
Filing date: 2002-06-05
Publication date: 2002-12-18

Abstract

The invention relates to a hydraulic formwork device with closed die forging. The upper die and the upper punch of the die are connected with the upper template through the upper die seat, and the lower punch is rigidly supported on the lower template through the lower punch pad , the oil cylinder sleeved on the periphery of the lower punch pad is fixed on the lower die plate, and the lower die is supported on the piston through the lower die seat. When in use, the upper die plate is connected to the upper platen of the press. When the upper platen of the press When the upper die and upper punch are driven to move downward, the upper and lower dies are closed, and sufficient mold clamping force is generated under the action of hydraulic oil in the mold base cylinder. This structure effectively overcomes the insufficient clamping force of the previous closed mold base. But the problem that affects the quality of forgings, its working performance is stable and reliable, and the service life of the die is greatly improved.

Description

Closed stamping hydraulic mould frame device

Technical field

The invention belongs to precision forging mould mould bases.

Background technology

The closing mould forging precise forming, normally the mould that has special die carrier is connected with forcing press, the action of forcing press and the action of mould bases are combined, the tight closure of lower cavity die in the realization, go up low punch and fill in, finish blank in the die cavity forging forming and die sinking, eject the process of product.And the closing mould forging mould bases device of traditional type all adopts elastic element structure (as metal spring or polyamine fat spring) to realize the matched moulds function.There is following shortcoming in this traditional type mould bases: the one, and mold clamping force is limited, and it is not enough and influence the geometric accuracy of forming spare to occur mold clamping force when extrusion billet, and the 2nd, impulse stroke is limited, and big stroke can reduce the service life and the reliability of flexible member.

Summary of the invention

The purpose of this invention is to provide a kind of closed stamping hydraulic mould frame device that has, improving its mold clamping force, and enlarge the impulse stroke of drift, make its service behaviour more reliable and stable, and improve its service life.

The present invention realizes as follows: cope match-plate pattern and lower bolster that it includes upper cavity die, upper punch, lower cavity die, low punch and is slidingly connected by guide pin bushing, guide pillar, upper cavity die is fixedlyed connected with cope match-plate pattern by the fovea superior die holder, upper punch upper end is nested with disk spring, and disk spring is between the spacing shoulder and cope match-plate pattern that pressured state is connected to upper punch; Low punch by the low punch cushion block by non-yielding prop on lower bolster, the low punch cushion block fixedly is nested with annular cylinder by the piston guide cover and is fixedly connected on the lower bolster, lower cavity die is supported on the piston by recessed die holder, places the bottom knockout bar that the lower end links to each other with ejecting mechanism under the forcing press in the inner chamber of low punch cushion block.

When using the present invention to have closed stamping hydraulic mould frame device, cope match-plate pattern is fixedlyed connected with the forcing press top board, lower bolster is fixed on the forcing press lower platen, injects low pressure oil by hydraulic system in the oil cylinder of hydraulic pressure die-shelf device.Its course of work is: when the forcing press top board drives cope match-plate pattern, upper punch, when upper cavity die is up together, blank can be put into lower cavity die; When the forcing press top board was descending, the contact of upper and lower die continued descendingly, under the effect of hydraulic oil, produces enough big mold clamping force in the oil cylinder of hydraulic pressure die-shelf device, and in whole matched moulds, extrusion process, mold clamping force increases with the increase of blank pressure.When the forcing press top board drives upper cavity die and upper punch and moves downward, be equivalent to low punch extrusion billet upwards simultaneously, until the shaping of finishing forging, the forcing press top board is up then, last lower cavity die separates, and ejects upper punch by disk spring, and the forging that falls within the upper cavity die is ejected, or ejecting mechanism drive bottom knockout bar upwards ejects low punch under the depended on pressure machine, and the forging that falls within the lower cavity die is ejected.Promptly finish the one action circulation.

Good effect of the present invention is: overcome closing mould forging mould bases mold clamping force deficiency in the past, the difficult problem that the drift impulse stroke is limited had both made its service behaviour more reliable and stable, improved forging precision, the service life of having improved mould again.

Description of drawings

Fig. 1 is that the present invention has the closed stamping hydraulic mould frame device structural representation.

Fig. 2 supplies with and the control system schematic diagram for the hydraulic oil of oil cylinder shown in Fig. 1.

The specific embodiment

Below the embodiment that provides with regard to accompanying drawing, structure of the present invention is further described.

With reference to Fig. 1, has closed stamping hydraulic mould frame device, comprise die (5), upper punch (3), lower cavity die (7), low punch (8), reach the cope match-plate pattern (1) and the lower bolster (15) that are slidingly connected by guide pin bushing (17), guide pillar (16), upper cavity die (5) is fixedlyed connected with cope match-plate pattern (1) by fovea superior die holder (4), upper punch (3) upper end is nested with disk spring (2), and disk spring (2) is between the spacing shoulder and cope match-plate pattern (1) that pressured state is connected to upper punch (3); Low punch (8) by low punch cushion block (11) by non-yielding prop on lower bolster (15), low punch cushion block (11) fixedly is nested with annular cylinder (12) by piston guide cover (13) and is fixed on the lower bolster (15), lower cavity die (7) is supported on the piston (10) by recessed die holder (9), places the bottom knockout bar (14) that the lower end links to each other with ejecting mechanism under the forcing press in the inner chamber of low punch cushion block (11).In the bottom of oil cylinder (12) fuel feed hole being set is connected with the hydraulic oil feed system.(6) be forging.

With reference to Fig. 2, the feed system of hydraulic oil is made up of fuel tank 18, oil filter 19, motor 20, gear pump 21, overflow valve 22, two-position three way magnetic valve 23, check valve 24, Pressure gauge 25, pressure meter switch 26, pressure switch 27, stop valve 28, accumulator 29, stop valve 30, one way sequence valve 31, Pressure gauge 32, pressure switch 33, stop valve 34, electromagnetic relief valve 35.

Low pressure oil from gear pump 21 enters in the hydraulic pressure die-shelf oil cylinder 12 by two-position three way magnetic valve 23, check valve 24, one way sequence valve 31, electromagnetic relief valve 35, has solved the supply problem of low pressure oil.

Accumulator 29, accumulator stop valve 30, one way sequence valve 31, electromagnetic relief valve 35 interoperations have solved the generation and the control technology of hydraulic pressure die-shelf mold clamping force.

By pressure switch 27 control reversal valves 23 intermittently is hydraulic pressure die-shelf supply low pressure oil.

This hydraulic system is accomplished the two-stage insurance, and promptly when system pressure surpassed a certain pressure, electromagnetic relief valve 35 was opened, system decompression; If this insurance is malfunctioning, pressure rises to when higher, and pressure switch 33 moves, and makes electromagnetic relief valve 35 open pressure release.

Claims

1. A closed die forging hydraulic formwork device, comprising an upper die (5), an upper punch (3), a lower die (7), a lower punch (8), and a guide sleeve (17), a guide The upper template (1) and the lower template (15) slidingly connected by the column (16) are characterized in that the upper die (5) is fixedly connected with the upper template (1) through the upper die base (4), and the upper punch (3 ) is sleeved with a disc spring (2), and the disc spring (2) abuts against the limit shoulder of the upper punch (3) and the upper template (1) in a compressed state; the lower punch (8) passes through The lower punch pad (11) is rigidly supported on the lower template (15), and the lower punch pad (11) is fixedly sleeved on the annular oil cylinder (12) through the piston guide sleeve (13) and fixed on the lower template (15). The lower die (7) is supported on the piston (10) through the lower die base (9), and the lower ejection material whose lower end is connected with the lower ejection mechanism of the press is inserted in the inner cavity of the lower punch pad (11). rod (14).