CN106001364A

CN106001364A - Molding mold for first radial inner ring of thin-walled cylinder inner wall

Info

Publication number: CN106001364A
Application number: CN201610600521.XA
Authority: CN
Inventors: 庄新村; 夏敏; 陶立平; 孙晓龙; 赵震; 张贵华; 刘志群
Original assignee: Shanghai Jiaotong University; Jiangsu Pacific Precision Forging Co Ltd
Current assignee: Shanghai Jiaotong University; Jiangsu Pacific Precision Forging Co Ltd
Priority date: 2016-07-28
Filing date: 2016-07-28
Publication date: 2016-10-12
Anticipated expiration: 2036-07-28
Also published as: CN106001364B

Abstract

The invention discloses a molding mold for a first radial inner ring of a thin-walled cylinder inner wall. The molding mold is a vertical axial sleeved mold composed of a core mold, a cylinder mold, a mold sleeve and a bottom mold jointly; the bottom mold is sleeved with the mold sleeve to form an outer mold structure, the internally-arranged core mold is matched with an axial counterbore of the bottom mold in a positioning mode through a small-end shoulder, the height of the small-end shoulder of the core mold is larger than the depth of the axial counterbore of the bottom mold, and the difference value is equal to the thickness of the radial inner ring arranged in a workpiece; the cylinder mold is axially inserted into a mold cavity reserved in the core mold along an inner hole of the mold sleeve, pressure is exerted to the cylinder mold, and then an upset-extruding structure on the internally-arranged workpiece is formed. According to the molding mold, one-step upset-extruding molding processing on the radial inner ring of the inner wall of the workpiece is achieved through mold upset-extruding, most important of all, the workpiece not only retains original fibers of a metal material but also is more compact in texture after being subjected to upset-extruding, and therefore the product is high in strength and rigidity. The molding mold belongs to a cold upset-extruding molding mold, adopts a one-step upset-extruding molding technology and is high in production efficiency and especially suitable for batch production and application.

Description

One radially inner ring finishing die of thin wall cylinder inwall

Technical field

The present invention relates to the technology in a kind of metal forming field, in particular it relates to a kind of upsetting extrusion mould, particularly a kind of one radially inner ring finishing die of thin wall cylinder inwall.

Background technology

Thin-wall barrel belongs to the part of conventional structure, and application scenario is a lot.Under prior art conditions, it is equipped with radially inner ring and wall thickness thin-wall barrel technique not etc. for making inwall, mainly has shaping by stock removal technique and the big class of casting forming process two.What current manufacturing industry application was most is machine cut forming technology, and blank is through the available intended precision size of machine cut processing and form and position tolerance., machine cut forming technology except cutting output greatly in addition to, stock utilization is the lowest, maximum deficiency be the original fibrous tissue of metal material by artificial destruction, cause mechanical performance and the mechanical properties decrease of product.Casting forming process implements relative ease, and the blank follow-up machining amount cast is few, and its deficiency is that production efficiency is low, and the mechanical performance index of metal material is on the low side, and it is supporting that the product made can only be suitable for general occasion.The parts majority of automobile accessories thin-wall barrel is in the position of transmission moment of torsion, for these position auxiliary equipments in addition to requiring higher precision, with greater need for having enough intensity and rigidity, the product applying existing machine cut and casting forming process to make not exclusively reaches automobile accessories requirement.

Summary of the invention

The thin wall cylinder that present invention is generally directed to machine cut and casting forming process manufacture is not suitable for automobile accessories problem, proposing one radially inner ring finishing die of thin wall cylinder inwall of a kind of supporting upsetting extrusion technique, this mode structure is simple, reasonable stress, the demoulding is easy, forming quality good.

The present invention is achieved through the following technical solutions technical goal.

One radially inner ring finishing die of thin wall cylinder inwall, it is collectively constituted vertical axial fit mould by core, cylinder mould, die sleeve and bed die.Described die sleeve is that cylindrical structural member, bottom face and endoporus press workpiece blank outer wall shape and the preset shaping of size.Described bed die is flange-like member, the preset axial counterbore of boss upward, and bed die overcoat die sleeve constitutes cast outer mold structure.It thes improvement is that: described core is a joint coaxial evagination shoulder shaft part, big end outside diameter upward is equal to workpiece blank diameter of bore, small end shoulder down and bed die axial counterbore location fit, core small end height of shoulder down is more than the bed die axial counterbore degree of depth, difference is equal to workpiece built-in radial inner ring thicknesses, and core small end shoulder diameter down is equal to the workpiece diameter internal diameter to internal ring.Described cylinder mould is axially inserted into until cooperatively forming reserved die cavity with core along die sleeve endoporus, and pressure cylinder mould constitutes the upsetting squeeze structure to built-in workpiece downwards.

In said structure, on described bed die, preset axial counterbore is flat circular hole, axial counterbore and core small end shoulder matched in clearance down.

The present invention compared with prior art, has the positive effect that:

1, the tooling structre of axial fit is simple, it is easy to make；

2, workpiece blank is processed through upsetting squeeze, had both retained the original fiber of metal material, and had made again tissue finer and close, and the product strength made is high, good rigidly；

3, workpiece is by upsetting extrusion, and follow-up amount of machining is the fewest, and stock utilization is high；

4, workpiece is through a step upsetting extrusion, and production efficiency is high.

Accompanying drawing explanation

Fig. 1 is the structural profile schematic diagram before the present invention does not presses.

Fig. 2 be in Fig. 1 workpiece 5 by the structural profile schematic diagram after upsetting squeeze.

Detailed description of the invention

Below according to accompanying drawing and in conjunction with the embodiments, the invention will be further described.

One radially inner ring finishing die of thin wall cylinder inwall shown in the drawings, it is collectively constituted vertical axial fit mould by core 1, cylinder mould 2, die sleeve 3 and bed die 4.Described die sleeve 3 is that cylindrical structural member, bottom face and endoporus press workpiece 5 blank outer wall shape and the preset shaping of size.Described bed die 4 is in flange-like member, and the preset axial counterbore of boss upward, bed die 4 overcoat die sleeve 3 constitutes cast outer mold structure.Described core 1 is a joint coaxial evagination shoulder shaft part, and big end outside diameter upward is equal to workpiece 5 blank diameter of bore, small end shoulder down and the axial counterbore location fit of bed die 4.Axial counterbore preset on bed die 4 in the present embodiment is flat circular hole, axial counterbore and core 1 small end shoulder matched in clearance down.It addition, the small end height of shoulder that core 1 is down is more than the axial counterbore degree of depth of bed die 4, difference is equal to workpiece and built-in radial inner ring thicknesses.Core 1 small end shoulder diameter down is equal to the internal diameter of workpiece 5 built-in radial internal ring.Described cylinder mould 2 is axially inserted into along die sleeve 3 endoporus until cooperatively forming reserved die cavity with core 1, and pressure cylinder mould 2 constitutes the upsetting squeeze structure to built-in workpiece 5 downwards.Workpiece 5 is by producing plastic deformation after upsetting squeeze, excess metal material is extruded between core 1 and bed die 4 end face reserved gap, and the metal material of press-in directly forms workpiece 5 inwall radially inner ring.The present invention realizes workpiece 5 inwall radially inner ring one step forming by mould upsetting squeeze and processes, and owing to die forming precision is high, follow-up amount of machining is little, and stock utilization is high.Most important is that workpiece 5 had both retained the original fiber of metal material after upsetting squeeze, makes again tissue finer and close, therefore product is higher than prior art intensity, good rigidly, fully meets automobile accessories requirement.The invention belongs to cold-extrusion shaping mould, use a step upsetting extrusion technique, production efficiency is high, is particularly suitable for mass production applications.

Claims

1. one radially inner ring finishing die of thin wall cylinder inwall, it is collectively constituted vertical axial fit mould by core (1), cylinder mould (2), die sleeve (3) and bed die (4)；Described die sleeve (3) is that cylindrical structural member, bottom face and endoporus press workpiece (5) blank outer wall shape and the preset shaping of size；Described bed die (4) is in flange-like member, and the preset axial counterbore of boss upward, bed die (4) overcoat die sleeve (3) constitutes cast outer mold structure；It is characterized in that: described core (1) is a joint coaxial evagination shoulder shaft part, big end outside diameter upward is equal to workpiece (5) blank diameter of bore, small end shoulder down and bed die (4) axially counterbore location fit, core (1) small end height of shoulder down is more than bed die (4) the axially counterbore degree of depth, difference is equal to workpiece 5 built-in radial inner ring thicknesses, and core (1) small end shoulder diameter down is equal to the internal diameter of workpiece (5) interior radially inner ring；Described cylinder mould (2) is axially inserted into until cooperatively forming reserved die cavity with core (1) along die sleeve (3) endoporus, and pressure cylinder mould (2) constitutes the upsetting squeeze structure to built-in workpiece (5) downwards.

One radially inner ring finishing die of thin wall cylinder inwall the most according to claim 1, it is characterised in that: the upper preset axial counterbore of described bed die (4) is flat circular hole, axial counterbore and core (1) small end shoulder matched in clearance down.