CN203197089U

CN203197089U - Mould with structure for preventing workpiece or scrap from ascending

Info

Publication number: CN203197089U
Application number: CN 201320169718
Authority: CN
Inventors: 张燕琴
Original assignee: Dongguan Polytechnic
Current assignee: Dongguan Polytechnic
Priority date: 2013-04-05
Filing date: 2013-04-05
Publication date: 2013-09-18
Anticipated expiration: 2023-04-05

Abstract

The utility model relates to the technical field of stamping moulds, in particular to a mould with a structure for preventing workpieces or scraps from ascending, which comprises a mould base and a convex mould, wherein the front end of the convex mould is provided with a concave pit, a spring piece is fixedly arranged in the concave pit, and at least one part of the spring piece extends out of the front end surface of the convex mould in a free state; during blanking, the convex mould enters a concave mould from top to bottom to finish the blanking; the spring piece is pressed during the blanking, so that the spring piece is always kept aligned with the front end surface of the convex mould; and after the blanking is finished, the convex mould begins to be upwards raised under the driving of the mould base, so that the blanked workpieces or scraps are separated from the convex mould to enter a concave mould opening under the action of the resilience force of the spring piece. Through the mould, the problem of workpiece or scrap ascending in the stamping process is effectively solved, and the structure is simple and reliable.

Description

Has the mould that prevents product or waste material lift structure

Technical field

The utility model relates to the Stamping Die Technology field, and particularly a kind of have a mould that prevents product or waste material lift structure.

Background technology

Mould is formed by each assembling parts, during punching press, stamps out satisfactory metalwork by the upper die and lower die cooperation.

Mould is wanted and can be worked, and the reliability of discharging is very important.Generally speaking, large skeletal waste we can utilize stripper to implement discharging, the fritter product that stamping-out gets off or waste material then utilize Action of Gravity Field that it is fallen down from die, but sometimes also unreliable by Action of Gravity Field, especially in the situation that high speed stamping, owing to reasons such as speed is fast, die point magnetization, may cause product or waste material to rise from the die mouth.If the product or the waste material that rise stick on the punch cutting edge plane, can affect normal operation, when serious even can mold damage and forcing press, therefore to avoid the generation of this phenomenon, the mechanism that prevents reliably product and waste material rising just must be arranged.

At present, when general large part punching, week leftover bits and pieces of material discharging can adopt patrix to install elastic tripper additional, and middle waste material can adopt the knockout rod in the forcing press, for the waste material in the middle of preventing is bonded on the punch, in punch, be provided with two knockout rods, but utilize the knockout rod discharging so that mould structure is complicated, cost rises.And knockout rod is only applicable to the large part of stamping-out, and when at high speed stamping porous finding, the less centre of punch can't arrange knockout rod, therefore is unsuitable for adopting knockout rod to carry out discharging.

The utility model content

The utility model is in order to solve diel when the punching press finding, can't adopt knockout rod to prevent that product or waste material rising from causing product or waste material to stick on the punch cutting edge plane, affect the mould normal operation, even the problem of mold damage, and provide a kind ofly have a mould that prevents product or waste material lift structure.

For reaching above-mentioned functions, the technical scheme that the utility model provides is:

A kind of have a mould that prevents product or waste material lift structure, comprise die holder and punch, the front end of described punch is provided with pit, is fixedly installed spring leaf in the described pit, under free state, described spring leaf has at least a part to stretch out the front end face of described punch.

Preferably, described spring leaf is " second " word shape.

Preferably, to stretch out the height of the front end face of described punch be 1～4mm to described spring leaf.

The beneficial effects of the utility model are: a kind of have a mould that prevents product or waste material lift structure, comprise die holder and punch, the front end of described punch is provided with pit, be fixedly installed spring leaf in the described pit, under free state, described spring leaf has at least a part to stretch out the front end face of described punch; When stamping-out, punch enters die from top to bottom, finish stamping-out, described spring leaf pressurized when stamping-out, therefore keep concordant with the punch front end face all the time, after stamping-out finished, punch began up to lift under the drive of die holder, punch part or waste material separate to enter the die mouth with punch under the effect of spring leaf screen resilience; The utility model has solved the problem that in punching course product or waste material rise effectively, and simple in structure, reliable.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Structural representation when Fig. 2 is the utility model stamping-out.

The specific embodiment

Be further elaborated below in conjunction with accompanying

drawing

1 and 2 pairs of the utility model of accompanying drawing:

As shown in Figure 1 have a mould that prevents product or waste material lift structure, comprise die holder 1 and punch 2, punch 2 is fixedly installed on the die holder 1, the front end of punch 2 is provided with pit 21, is fixedly installed spring leaf 3 in the pit 21, in the present embodiment, spring leaf 3 is " second " word shape, one end of spring leaf 3 is fixed in the pit 21 with screw 4, and under free state, spring leaf 3 other ends stretch out the front end face of described punch 2.

The height that spring leaf 3 stretches out the front end face of punch 2 is followed according to the size of stamped part and is selected, when stamped part is larger, the height that stretches out is higher, and for reaching reasonable punching press and discharging effect, spring leaf 3 stretches out the general 1～4mm of selection of height of the front end face of punch 2.

As shown in Figure 2, when stamping-out, punch 2 enters die (not shown among Fig. 2) from top to bottom, the part of exposing punch 2 front end faces at the effect lower spring sheet 3 of the resistance of material 5 is squeezed, and makes spring leaf 3 exposed portions serve retraction, thereby keeps concordant with the front end face of punch 2 all the time, after stamping-out finishes, punch 2 begins up lifting under the drive of die holder 1, punch part or waste material 51 separate to enter die mouth (not shown among Fig. 2) with punch 2 under the effect of spring leaf 3 elastic force.

The above embodiment, it is preferred embodiments of the present utility model, be not to limit practical range of the present utility model, therefore all equivalences of doing according to the described structure of the utility model claim, feature and principle change or modify, all should be included in the utility model patent claim.

Claims

1. one kind has the mould that prevents product or waste material lift structure, comprise die holder (1) and punch (2), it is characterized in that: the front end of described punch (2) is provided with pit (21), be fixedly installed spring leaf (3) in the described pit (21), under free state, described spring leaf (3) has at least a part to stretch out the front end face of described punch (2).

2. as claimed in claim 1 have a mould that prevents product or waste material lift structure, and it is characterized in that: described spring leaf (3) is " second " word shape.

3. as claimed in claim 1 or 2 have a mould that prevents product or waste material lift structure, and it is characterized in that: the height that described spring leaf (3) stretches out the front end face of described punch (2) is 1～4mm.