CN218134956U

CN218134956U - High-precision powder metallurgy gear die

Info

Publication number: CN218134956U
Application number: CN202222547563.5U
Authority: CN
Inventors: 刘恒鑫; 荆丰林; 袁野
Original assignee: Yingming Auto Parts Jiangsu Co ltd
Current assignee: Yingming Auto Parts Jiangsu Co ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2022-12-27
Anticipated expiration: 2032-09-26

Abstract

The utility model relates to a high accuracy powder metallurgy gear die, including last moulding-die, well mould, push down a mould, push down two moulds, first suppression plug and three second suppression plug, go up the moulding-die and push down a mould axial setting in both ends about well mould, push down a die sleeve and locate and push down on the two moulds, first suppression plug sets up in pushing down the core hole of two mould axle centers departments, three second suppression plug uses first suppression plug to set up as the centre of a circle equidistance, and three second suppression plug runs through respectively and pushes down a mould, pushes down two moulds and goes up the moulding-die. The utility model has the advantages that: adopt a plurality of second suppression plug to run through the structure of pushing down two moulds, pushing down one mould and last moulding-die, its axiality is guaranteed to the press when punching press from top to bottom, ensures the axial precision of gear behind the press forming, uses through the combination of pushing down two moulds and first suppression plug, and first suppression plug does not receive upper and lower mould stamping force and breaks when guaranteeing the drawing of patterns to save manufacturing cost for the enterprise, and effectively improved production efficiency.

Description

High-precision powder metallurgy gear die

Technical Field

The utility model relates to a powder metallurgy embossing mold utensil technical field, concretely relates to is a high accuracy powder metallurgy gear mould.

Background

The metallurgical powder forming is a novel metal forming processing technology, can use less cost, can produce the metal parts with very high dimensional accuracy in a large scale rapidly, because the powder metallurgy product does not have the cutting characteristic, have very great advantage in the manufacture of parts such as gear, band pulley, rotor, etc., the powder metallurgy compacting die is the main tool of powder compacting, it is concerned with the quality of powder metallurgy product production, problems such as cost, safety and productivity, etc., have extremely important influence on powder metallurgy technology and part;

the core rod that is used for the axial bore to form among traditional powder metallurgy embossing mold utensil is mostly the slender pole, through yoke shaped plate, connect on the press ram down, and up-and-down motion together thereupon, its length is long, the rigidity is poor, easy rupture, especially when suppressing the shaping of small-size gear, core rod ejector pin portion diameter is littleer, realize the drawing of patterns along with last moulding-die and the downstream of stamping down together during the core rod drawing of patterns, because stripping force is big, cause the rupture of core rod more easily, make manufacturing cost improve, and the work efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: a high-precision powder metallurgy gear die is provided to solve the problems in the background technology.

In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides a high accuracy powder metallurgy gear die, includes last moulding-die, well mould, pushes down a mould, pushes down two moulds, first suppression plug and three second suppression plug, go up the moulding-die with push down a mould axial set up in both ends about the well mould, push down a die sleeve and locate push down on the two moulds, first suppression plug set up in the core hole of pushing down two mould axle centers department, it is three the second suppression plug uses first suppression plug to set up as the centre of a circle equidistance, and three the second suppression plug runs through respectively push down a mould two moulds with go up the moulding-die.

Preferably, a plurality of axial through holes matched with the first pressing core rod and the second pressing core rod are formed in the upper pressing die, and transverse air holes communicated with the axial through holes are formed in the circumferential arm of the upper pressing die.

Preferably, an inner cavity is formed in the middle of the middle die, the inner diameter of the inner cavity is matched with the outer diameter of the upper pressing die and the outer diameter of the lower pressing die, and arc chamfers are formed in the upper end and the lower end of the inner cavity.

Preferably, a step inner hole is formed in the axis of the pressing die, and inner teeth are arranged on the inner wall of the upper portion of the step inner hole.

Preferably, the second downward pressing die comprises a guide sleeve, a void avoiding part and an outer tooth part, and the outer tooth part is matched with the first downward pressing die.

Preferably, the first pressed core rod and the second pressed core rod have the same structure, and the diameter of the first pressed core rod ejector rod is smaller than that of the second pressed core rod ejector rod.

The beneficial effects of the utility model are that: the utility model provides a high accuracy powder metallurgy gear mold, adopts a plurality of second suppression plug to run through and pushes down two moulds, pushes down the structure of a mould and last moulding-die, and its axiality is guaranteed to the press when punching press from top to bottom, ensures the axial precision of gear after the press forming, uses through the combination of pushing down two moulds and first suppression plug, and first suppression plug does not receive upper and lower mould stamping force and breaks when guaranteeing the drawing of patterns, saves manufacturing cost for the enterprise to production efficiency has effectively been improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a press-down die structure of the present invention;

FIG. 3 is a schematic structural view of a pressing-down mold according to the present invention;

fig. 4 is a structural schematic diagram of a first pressing core rod of the present invention.

In the figure: 1-upper pressing die, 2-middle die, 3-lower pressing die, 4-lower pressing die, 41-guide sleeve, 42-avoidance part, 43-external tooth part, 5-first pressing core rod, 6-second pressing core rod, 7-axial through hole, 8-transverse air hole, 9-inner cavity and 10-step inner hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1-4, a high-precision powder metallurgy gear mold comprises an upper pressing mold 1, a middle mold 2, a first lower pressing mold 3, a second lower pressing mold 4, a first pressing core rod 5 and three second pressing core rods 6, wherein the upper pressing mold 1 and the first lower pressing mold 3 are axially arranged at the upper end and the lower end of the middle mold 2, and the first lower pressing mold 3 is sleeved on the second lower pressing mold 4.

A plurality of axial through holes 7 matched with the first pressing core rod 5 and the second pressing core rod 6 are formed in the upper pressing die 1, and transverse air holes 8 communicated with the axial through holes 7 are formed in the circumferential arms of the upper pressing die 1, so that pressure recoil is formed after pressing, and the punching pressure is influenced.

An inner cavity 9 is arranged in the middle of the middle die 2, the inner diameter of the inner cavity 9 is matched with the outer diameter of the upper pressing die 1 and the outer diameter of the lower pressing die 3, and arc chamfers are arranged at the upper end and the lower end of the inner cavity 9.

The shaft center of the downward pressing die 3 is provided with a step inner hole 10, and the inner wall of the upper part of the step inner hole 10 is provided with inner teeth.

Two moulds 4 push down include guide pin bushing 41, keep away sky portion 42 and external tooth portion 43, external tooth portion 43 with push down a mould 3 phase-match, push down two moulds 4 and get into and push down a mould 3 time, keep away and leave the clearance between sky portion 42 and the step hole 10 lower part, prevent to produce interior pressure, external tooth portion 43 and the internal tooth phase-match on step hole 10 upper portion form the gear and press the shaping chamber.

The first pressing core rod 5 and the second pressing core rod 6 are identical in structure, the ejector rod diameter of the first pressing core rod 5 is smaller than that of the ejector rod of the second pressing core rod 6, the molded gear is ejected out through the first pressing core rod 5 for demolding, and the upper pressing die 1, the lower pressing die 3 and the lower pressing die 4 are axially positioned through the second pressing core rod 6.

When the pressing die is used, the hollow avoiding portion 42 and the outer tooth portion 43 of the lower pressing die 4 are arranged in the lower pressing die 3, the upper end of the outer tooth portion 43 enters the inner tooth cavity in the upper portion of the step inner hole 10, metal powder for press forming is filled in the inner tooth cavity in the upper portion of the step inner hole 10 of the lower pressing die 3, the upper pressing die 1 and the lower pressing die 3 are simultaneously subjected to one-step punching through a punching device, a first pressing core rod 5 and a second pressing core rod 6 at the bottom are extruded after the press forming is carried out, and when the first pressing core rod 5 is pushed upwards, the lower pressing die 4 is driven to eject the press-formed gear from the lower pressing die 3 for demoulding.

The above examples are provided for further illustration of the present invention, but do not limit the present invention to these specific embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be understood as being within the protection scope of the present invention.

Claims

1. The utility model provides a high accuracy powder metallurgy gear die, includes that go up moulding-die (1), well mould (2), push down a mould (3), push down two moulds (4), first suppression plug (5) and three second suppression plug (6), its characterized in that: go up moulding-die (1) with push down a mould (3) axial set up in both ends about well mould (2), push down a mould (3) cover and locate push down on two moulds (4), first suppression plug (5) set up in the core hole of pushing down two moulds (4) axle center department, it is three second suppression plug (6) use first suppression plug (5) to set up as the centre of a circle equidistance, and three second suppression plug (6) run through respectively push down a mould (3) push down two moulds (4) with go up moulding-die (1).

2. A high accuracy powder metallurgy gear die in accordance with claim 1, wherein: the upper pressing die (1) is internally provided with a plurality of axial through holes (7) matched with the first pressing core rod (5) and the second pressing core rod (6), and the circumferential arm of the upper pressing die (1) is provided with a transverse air hole (8) communicated with the axial through holes (7).

3. A high accuracy powder metallurgy gear die in accordance with claim 1, wherein: an inner cavity (9) is arranged in the middle of the middle die (2), the inner diameter of the inner cavity (9) is matched with the outer diameter of the upper pressing die (1) and the outer diameter of the lower pressing die (3), and arc chamfers are arranged at the upper end and the lower end of the inner cavity (9).

4. A high accuracy powder metallurgy gear die in accordance with claim 1, wherein: the pressing die is characterized in that a step inner hole (10) is formed in the axis of the pressing die (3), and inner teeth are arranged on the inner wall of the upper portion of the step inner hole (10).

5. A high accuracy powder metallurgy gear die in accordance with claim 1, wherein: the second downward pressing die (4) comprises a guide sleeve (41), a clearance part (42) and an outer tooth part (43), and the outer tooth part (43) is matched with the first downward pressing die (3).

6. A high accuracy powder metallurgy gear die in accordance with claim 1, wherein: the first pressing core rod (5) and the second pressing core rod (6) are identical in structure, and the diameter of the ejector rod of the first pressing core rod (5) is smaller than that of the ejector rod of the second pressing core rod (6).