CN214263559U

CN214263559U - Prevent bending deformation's mould structure

Info

Publication number: CN214263559U
Application number: CN202023235161.9U
Authority: CN
Inventors: 邵昆淼; 刘阳; 孟祥辉
Original assignee: Dalian Shentong Mould Co ltd
Current assignee: Dalian Shentong Mould Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-09-24
Anticipated expiration: 2030-12-29

Abstract

A mould structure for preventing bending deformation comprises a bending upper mould arranged on an upper mould mechanism, and a pair of bending lower moulds which are matched with the bending upper mould, are arranged on two sides of a lower mould mechanism and are symmetrically arranged, wherein a material pressing plate is arranged between the two bending lower moulds, the lower part of the lower material pressing plate is connected with an ejector plate through a connecting screw rod, and the ejector plate is connected with an air cushion ejector rod on a press machine; convex bending ribs are arranged on two side edges of the lower surface of the upper bending die, and the side edges of the bending ribs are right-angled. When stamping begins, the bending upper die presses towards a workpiece, meanwhile, the pressure plate, the ejector plate and the air cushion ejector rod upwards support the workpiece, the workpiece is stressed before bending, the outward-protruding bending ribs can be pressed into the workpiece under the action of the stress to form indentations, then the upper die mechanism continues to move downwards, right-angle flanging begins to appear on two sides of the workpiece under the action of the bending lower die, and in the bending process, the generated force blocks the workpiece through the outward-protruding bending ribs, so that the deformation of the workpiece under the pressure is overcome, the deformation of a large through hole in the middle of the workpiece is prevented, and the product quality is ensured.

Description

Prevent bending deformation's mould structure

Technical Field

The utility model relates to a stamping die structure, especially a stamping die structure that prevents bending deformation of sheet metal form work piece that there is the through-hole in the middle part of the punching press.

Background

The stamping die comprises a bending upper die arranged on an upper die mechanism, a bending lower die matched with the bending upper die is arranged on a lower die mechanism, the two bending lower dies are symmetrically arranged and are connected with an ejector plate through a connecting screw rod at the lower part of the bending lower die, and the ejector plate is connected with an air cushion ejector rod on a press machine for stamping. As shown in fig. 3 and 4: the thin plate-like workpiece 2 has a large through hole 11 in the middle and right-angled flanges 10 on both sides of the workpiece 2. As shown in fig. 1: when the right-angle flanging 10 is punched, a sheet-shaped workpiece 2 with a large-sized through hole 11 in the middle is placed on the pressure plate 3 and the bending lower die 4, the press machine drives the upper die mechanism to move downwards, the bending upper die 1 presses the workpiece 2, the pressure plate 3, the connecting screw 7, the ejector plate 5 and the air cushion ejector rod 6 move downwards in the process, and the upward ejecting force generated by the air cushion ejector rod 6 is overcome at the moment. The workpiece 2 produces a right-angled flanging 10 on both sides under the interaction of the lower bending die 4 and the upper bending die 1. In the stamping process, because the middle of the workpiece 2 is provided with the large-sized through hole 11, the whole workpiece 2 and the middle through hole 11 deform when the workpiece is stressed in stamping, and the product quality is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mould structure that prevents bending deformation that mould self can overcome the compressive deformation power when simple structure, punching press on the bending, guarantees that work piece and middle through-hole do not take place to warp, improve product quality.

The utility model discloses a mould structure for preventing bending deformation, which comprises a bending upper mould arranged on an upper mould mechanism, and a pair of symmetrically arranged bending lower moulds matched with the bending upper mould and arranged at two sides of a lower mould mechanism, wherein a pressure plate is arranged between the two bending lower moulds, the lower part of the pressure plate is connected with an ejector plate through a connecting screw rod, and the ejector plate is connected with an air cushion ejector rod on a press machine; the lower two sides of the bending upper die are provided with convex bending ribs, and the sides of the bending ribs are right-angled.

The utility model discloses a prevent mould structure of bending deformation, because there is the muscle of bending of evagination both sides below the mould in the bending, the side of muscle of bending is the right angle form, the punching press is when beginning, mould is pressed to the work piece in the bending, have the flitch simultaneously, the liftout plate, the air cushion ejector pin upwards supports the work piece, the work piece atress before bending, the muscle of bending of evagination can be impressed in the work piece under this effort, form the indentation, then upper die mechanism continues to move down, the right angle turn-ups begin to appear in the work piece both sides under the effect of crooked lower mould, the in-process of bending, the power of production blocks the work piece by the muscle of bending of evagination, the deformation of work piece has been overcome under the pressure, the deformation of large-scale through-hole in the middle of work piece has been prevented, product quality has been guaranteed.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is an enlarged schematic view of a portion a shown in fig. 1.

Fig. 3 is a schematic sectional view B-B shown in fig. 4.

Fig. 4 is a schematic view of the structure of the workpiece.

Detailed Description

As shown in fig. 1 and 2: the utility model discloses a prevent mould structure of bending deformation, including the crooked upper die 1 installed on the upper die mechanism, with crooked upper die 1 match install in lower die mechanism both sides and a pair of crooked lower mould 4 of symmetry setting, be equipped with pressure flitch 3 between two crooked lower moulds 4, the lower part of pressure flitch 3 is connected with ejector plate 5 through connecting screw 7, ejector plate 5 is connected with air cushion ejector pin 6 on the press; convex bending ribs 8 are arranged on two lower side edges of the upper bending die 1, and the side edges of the bending ribs 8 are right-angled.

The utility model discloses a prevent mould structure of bending deformation, because there is the muscle 8 of bending of evagination in mould 1 below both sides in the bending, the side of muscle 8 of bending is the right angle form, the punching press is when beginning, mould 1 presses to work piece 2 in the bending, have flitch 3 simultaneously, ejector plate 5, air cushion ejector pin 6 upwards supports work piece 2, work piece 2 atress before bending, the muscle 8 of bending of evagination can be impressed in work piece 2 under this effort, form the indentation, then upper die mechanism continues to move down, 2 both sides of work piece begin to appear right angle turn-ups 10 under the effect of crooked lower mould 4, the in-process of bending, the power of production blocks work piece 2 by the muscle 8 of bending of evagination, the deformation of work piece 2 under the pressure has been overcome, large-scale through-hole 11's deformation in the middle of work piece 2 has been prevented, product quality has been guaranteed.

Claims

1. A mould structure for preventing bending deformation comprises a bending upper mould (1) arranged on an upper mould mechanism, and a pair of bending lower moulds (4) which are matched with the bending upper mould (1), are arranged on two sides of a lower mould mechanism and are symmetrically arranged, wherein a pressure plate (3) is arranged between the two bending lower moulds (4), the lower part of the pressure plate (3) is connected with an ejector plate (5) through a connecting screw rod (7), and the ejector plate (5) is connected with an air cushion ejector rod (6) on a press machine; the method is characterized in that: the bending upper die (1) is characterized in that convex bending ribs (8) are arranged on two lower side edges of the bending upper die, and the side edges of the bending ribs (8) are right-angled.