CN2171475Y

CN2171475Y - Pressing mould

Info

Publication number: CN2171475Y
Application number: CN 93242401
Authority: CN
Inventors: 赵玉彬; 赵明; 吕忠
Original assignee: Benxi Keda New Material Research Institute; Central Iron and Steel Research Institute
Current assignee: Benxi Keda New Material Research Institute; Central Iron and Steel Research Institute
Priority date: 1993-10-21
Filing date: 1993-10-21
Publication date: 1994-07-13
Anticipated expiration: 2003-10-21

Abstract

The utility model belongs to the technical field of a pressing mould, particularly a self positioning mould which is suitable for the raw material of the powder-metallurgy molybdenum element. The mould of the utility model mainly changes the flat-head pressing mould core of the existing mould, and the mold core of the mould is a press head with a concave cone port. Because the angle of the cone port is reasonable designed, the material can automatically adjust the position when the material of the molybdenum element is pressed. The inner density, the shape and the size of the product after shaping are obtain the design requirement, and the converted timber rate of the product of the molybdenum element which is produced by the prior art is raised.

Description

Pressing mould

The utility model belongs to the compacting tool set field.More be applicable to the self-align mould of using of powder metallurgy molybdenum unit raw material.

The molybdenum unit that in field of powder metallurgy, is produced be as molybdenum unit be the vitals in the controllable silicon components and parts in the transistor.In the production in the past, major part is to adopt molybdenum plate to be stamped to form.This method is long because of production process, yield rate low (average about 35%).The raw material loss is too big, and replaced by powder metallurgy molybdenum unit gradually, but powder metallurgy molybdenum unit has problems such as fragility and density are low, and its solution is by strengthening the compacting deflection of raw material and changing the brilliant tissue of casting, extrusion modling in extrusion die after forging into base again.The upper and lower core rod end face of this mould is two planes that are parallel to each other, owing to can't make raw material and mould concentric when feeding intake, often causes molybdenum unit's product lateral deviation after the compacting or does not justify mold damage.The subject matter of this mould is 1, owing to add aximal deformation value and increase billet size, therefore therefore the bearing of trend of uncontrollable product makes the product cylindrical irregular, increases the turning amount, has reduced lumber recovery.2, because molybdenum has bigger deformation drag, so plane pressure shape need have higher energy consumption, the therefore necessary equipment of considering the big pressure of investment.3, because forging makes the product cylindrical be free and open shape, product density is about uneven, brings very big hidden danger for the product quality of producing electronic component, makes electronic product performance decline.

The purpose of this utility model is to propose a kind of simple in structure and product yield, and lumber recovery is high, makes the compacting tool set that raw material can be self-align.

Automatically adjust the compacting tool set requirement of position according to the raw material that can make that the utility model proposed, we are designed, and that the self-align mould of raw material can be described in detail with reference to the accompanying drawings is as follows, and what the utility model accompanying drawing was given is the structural representation of this mould.In the accompanying drawings 1, be upper mold core, 2, be last die-cushion, 3, be interior die bush, 4, for outer die casing, 5, be lower mold core, 6, be die holder.The composition of the utility model mould is in the upper end of upper mold core 1 die-cushion 2 to be housed, last die-cushion 2 should be connected with the press seaming chuck, die holder 6 is housed below outside outer die casing 4, and die holder 6 is connected with head under the press, die bush 3 in being equipped with in outer die casing 4, interior die bush 3 is to be made by the high-strength wearable material.Lower mold core 5 is equipped with in the lower end in interior die bush 3, upper mold core 1 and lower mold core 5 should be with interior die bush 3 and are slidingly matched, it is characterized in that upper mold core 1 lower end is a spill awl mouthful pressure head, its spill degree of depth and spill prostomum degree can be set according to the product requirement size, upper mold core 1 spill mouth should be that big mouth is downward, and lower mold core 5 is the tack core rod.Also the spill mouth can be produced on the upper end of lower mold core 5 in addition according to the characteristics of the utility model mould, allow big mouthful of the spill mouth to make progress, same like this can the raw material pressurized slip with tapering adjust the raw material position in upper mold core (tack) when depress.It is when adopting a spill awl mouthful pressure head type core rod raw material being exerted pressure in being placed on die cavity that the utility model mould can make raw material reach self-align operation principle, the eminence raw material is then pressed to lower by an awl mouthful pressure head, make raw material extrusion molding equably, and make the central axis of formed product mutually concentric with the extrusion die axis.The product that adopts the utility model mould to be produced is that truncated cone-shaped, product material inside are stressed even, and shape is regular, and deflection reaches the requirement more than 30%, to production and end product quality have been created good basis together down.

The utility model mould has following characteristics compared with prior art.Punching out molybdenum unit's product and powder metallurgy molybdenum unit product are compared in the product of being produced by the utility model mould and the prior art, and it the results are shown in following table.In table, sequence number 1 is punching out molybdenum unit product, and 2 is powder metallurgy molybdenum unit product, 3 products for the production of this mould.

Product that this mould is produced and prior art are produced the product contrast table

Here be the form title

The parameter sequence number

Assembled watch

Process

Reprocess after the punching press

The product internal stress

The finished product benefit

1

About 35%

Difficult

Need

Inhomogeneous

Loss

2

About 55%

Easily

Need

Inhomogeneous

Obtained for 690,000 first year

3

Greater than 80%

Easily

Not

Evenly

Obtained for 7,600,000 first year

Claims

1, a kind of compacting tool set that can make raw material adjust the position automatically, this mould is in the upper end of upper mold core (1) die-cushion (2) to be housed, die holder (6) is equipped with in the below outside outer die casing (4), interior die bush (3) is housed in outer die casing (4), in interior die bush (3) lower end lower mold core (5) is housed, upper mold core (1) the lower end pressure head that it is characterized in that this mould is a spill awl mouthful pressure head, and big mouthful of this spill awl mouthful pressure head downwards, and lower mold core (5) is the tack core rod.

2, according to the described mould of claim 1, it is characterized in that lower mold core (5) also can be a spill awl mouthful pressure head, big mouthful of this spill awl mouthful pressure head is upwards, and upper mold core (1) is the tack core rod.