CN214639188U

CN214639188U - Gear cold working extrusion die

Info

Publication number: CN214639188U
Application number: CN202022766333.9U
Authority: CN
Inventors: 刘富森; 王开江; 龙行金
Original assignee: Sichuan Keleite Technology Co ltd
Current assignee: Sichuan Keleite Technology Co ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-11-09
Anticipated expiration: 2030-11-25

Abstract

The utility model discloses a gear cold processing extrusion die, the mould that adopts in the extrusion includes: the upper pressing die compresses the blank in the forming cavity when the blank is extruded by the extrusion die, so that the blank is in close contact with the inner wall of the forming cavity to form a gear; after the blank is extruded, the gear blank is obtained, the gear blank is ejected out of the forming cavity by the ejecting mechanism, the gear blank forming die is convenient and quick to use, the machining efficiency is high, raw materials are greatly saved, the machining cost is reduced, and the machined product is good in consistency.

Description

Gear cold working extrusion die

Technical Field

The utility model relates to a machine-building technical field especially relates to a gear cold processing extrusion die.

Background

The traditional gear machining process is that gear turning is performed first and then gear milling is performed, on one hand, the machining process is complex, on the other hand, the needed raw materials are more, the tensile strength of the machined gear is weak, and the consistency of the machined gear is poor; the gear processing can also adopt a cold extrusion technology, the gear produced by the extrusion technology has high strength, saves raw materials and saves processing time, so the gear processing technology is widely applied to the fields of aviation, automobiles, weapons, agricultural machinery and engineering machinery, but when the cold extrusion technology is used for processing parts such as gears with large modulus, small tooth number and the like and parts such as shafts and multi-steps, the processed parts have low dimensional precision and can not meet the processing requirements aiming at high-precision manufacturing industry, and the cold extrusion technology needs to carry out surface treatment such as acid washing, phosphorization, saponification and the like on the products before processing the products, so the gear processing technology is not environment-friendly, and has discharge and environmental pollution.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem among the prior art, the utility model provides a gear warm extrusion processing technology and extrusion die thereof, it has solved the low and relatively poor problem of product uniformity of gear type part precision such as prior art processing big modulus, few tooth number.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a gear cold processing extrusion die, which comprises a female die, wherein a forming cavity is arranged in the female die, a tooth-shaped groove for forming a gear is arranged on the inner wall of the forming cavity, a male die is arranged at the center of the bottom in the forming cavity, a male die outer sleeve is arranged on the outer wall of the male die, the male die and the male die outer sleeve are in interference fit, and the male die outer sleeve and the bottom of the female die are in interference fit;

the bottom of the female die is provided with a material ejecting mechanism, and the material ejecting mechanism comprises an ejecting rod and a power element for driving the ejecting rod to move up and down; the ejector rod comprises 4 elliptic ejection columns, through holes matched with the 4 ejection columns are formed in the outer sleeve of the male die, and the 4 ejection columns can penetrate through the through holes and are positioned in the forming cavity;

and an upper pressing die matched with the female die is arranged at the top of the female die, and a driving oil cylinder is connected to the top of the upper pressing die and drives the upper pressing die to linearly move in the vertical direction. When the extrusion die is used for extruding the blank, the upper pressing die is used for pressing the blank in the forming cavity tightly, so that the blank is in close contact with the inner wall of the forming cavity to form a gear; after the blank is extruded, the gear blank is obtained, and the gear blank is ejected out of the forming cavity by the ejecting mechanism, so that the gear blank forming machine is convenient and quick to use, high in machining efficiency and good in consistency of machined products.

Further, the power element is a cylinder or an oil cylinder.

Furthermore, the female die, the male die and the male die outer sleeve are made of inconel 718 nickel-based alloy, and the inconel 718 nickel-based alloy has high temperature resistance, so that the problem of short service life of the die at the temperature of over 600 ℃ is solved.

Furthermore, the length-diameter ratio of the male die is 1.2:1, so that the problem that the male die is not enough in strength and is easy to break due to overlong is avoided, and the service life of the die is prolonged.

Furthermore, the coaxiality error of the male die and the female die is +/-0.02 mm, the product precision is guaranteed, the male die is stably stressed in the extrusion process, and the service life of the male die is prolonged.

The utility model has the advantages that: when the extrusion die is used for extruding the blank, the upper pressing die is used for pressing the blank in the forming cavity tightly, so that the blank is in close contact with the inner wall of the forming cavity to form a gear; after the blank is extruded, the gear blank is obtained, and the gear blank is ejected out of the forming cavity by the ejecting mechanism, so that the gear blank forming machine is convenient and quick to use, high in machining efficiency and good in consistency of machined products.

Drawings

FIG. 1 is a schematic structural diagram of a gear cold working extrusion die.

Wherein, 1, a concave die; 2. a molding cavity; 3. a toothed groove; 4. a male die; 5. a male die outer sleeve; 6. a material ejecting mechanism; 601. a lifter bar; 602. a power element; 7. a through hole; 8. and (4) pressing the die.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art within the spirit and scope of the present invention as defined and defined by the appended claims.

As shown in figure 1, the utility model provides a gear cold processing extrusion die, it includes die 1, is provided with into die 2 in the die 1, is provided with the tooth-shaped groove 3 that is used for shaping the gear on the shaping chamber 2 inner wall, is provided with terrace die 4 in the shaping chamber 2 bottom center department, and the draw ratio of terrace die 4 is 1.2:1, avoids terrace die 4 because overlength, the problem that intensity is easy to break inadequately, has improved mould life; the coaxiality error of the male die 4 and the female die 1 is +/-0.02 mm, the product precision is guaranteed, the stress of the male die 4 is stable in the extrusion process, and the service life of the male die 4 is prolonged.

A male die outer sleeve 5 is arranged on the outer wall of the male die 4, the male die 4 is in interference fit with the male die outer sleeve 5, and the male die outer sleeve 5 is in interference fit with the bottom of the female die 1; the bottom of the female die 1 is provided with an ejection mechanism 6, the ejection mechanism 6 comprises an ejection rod 601 and a power element 602 for driving the ejection rod 601 to move up and down, and the power element 602 can be an air cylinder or an oil cylinder;

the ejector rod 601 comprises 4 elliptic ejection columns, through holes 7 matched with the 4 ejection columns are formed in the male die outer sleeve 5, and the 4 ejection columns can penetrate through the through holes 7 and are positioned in the forming cavity 2;

the top of the female die 1 is provided with an upper pressing die 8 matched with the female die 1, the top of the upper pressing die 8 is connected with a driving oil cylinder, and the driving oil cylinder drives the upper pressing die 8 to do linear motion in the vertical direction. When the extrusion die is used for extruding the blank, the upper pressing die 8 compresses the blank in the forming cavity 2 to enable the blank to be in close contact with the inner wall of the forming cavity 2 to form a gear; after the blank is extruded, a gear blank is obtained, and the gear blank is ejected out of the forming cavity 2 by the ejecting mechanism 6, so that the method is convenient and rapid, the machining efficiency is high, and the machined product has good consistency.

Claims

1. The gear cold machining extrusion die is characterized by comprising a female die (1), wherein a forming cavity (2) is arranged in the female die (1), a tooth-shaped groove (3) for forming a gear is formed in the inner wall of the forming cavity (2), a male die (4) is arranged at the center of the bottom in the forming cavity (2), a male die outer sleeve (5) is arranged on the outer wall of the male die (4), the male die (4) and the male die outer sleeve (5) are in interference fit, and the male die outer sleeve (5) and the bottom of the female die (1) are in interference fit;

the bottom of the female die (1) is provided with an ejection mechanism (6), and the ejection mechanism (6) comprises an ejection rod (601) and a power element (602) for driving the ejection rod (601) to move up and down; the ejector rod (601) comprises 4 elliptic ejection columns, through holes (7) matched with the 4 ejection columns are formed in the male die outer sleeve (5), and the 4 ejection columns can penetrate through the through holes (7) to be located in the forming cavity (2);

an upper pressing die (8) matched with the female die (1) is arranged at the top of the female die (1), and a driving oil cylinder for driving the upper pressing die (8) to linearly move in the vertical direction is connected to the top of the upper pressing die (8);

the female die (1), the male die (4) and the male die outer sleeve (5) are made of inconel 718 nickel-based alloy.

2. A gear cold work extrusion die according to claim 1, characterised in that the length to diameter ratio of the punch (4) is 1.2: 1.

3. A gear cold work extrusion die according to claim 2, characterised in that the male and female dies (1) have a coaxiality error of ± 0.02 mm.