CN209792289U

CN209792289U - Gear shaft cold extrusion die

Info

Publication number: CN209792289U
Application number: CN201920254103.9U
Authority: CN
Inventors: 王炎泽
Original assignee: Changzhou Jinqiu Bearing Factory
Current assignee: Changzhou Jinqiu Bearing Factory
Priority date: 2019-02-27
Filing date: 2019-02-27
Publication date: 2019-12-17
Anticipated expiration: 2029-02-27

Abstract

The utility model relates to a cold extrusion die of tooth axle, the components of a whole that can function independently structure of mould and lower mould for having, upward be equipped with the guide pillar between mould and the lower mould, go up the mould and include upper die base, go up base, last stress circle and last mold core, go up fixed upper die base on the base, set up the mold core on the upper die base, the lower mould includes mold holder, lower base, ejector pin, first mold core, tooth mould bottom plate, second mold core and stress circle down, fixed mold holder on the lower base, by supreme ejector pin, second mold core, tooth mould bottom plate and the first mold core down of setting gradually down on the mold holder. The utility model has the advantages that the mould can make the blank-making piece to be formed to the maximum extent, the shape is close to the appearance of the extrusion piece, the mould after replacing one lower mould core can make the gear basically formed, the smooth finish of the tooth surface is ensured, and the mould after replacing the other lower mould core can realize the finishing of the tooth part and the extrusion of the spline; except the mold core and part of the parts, other parts are universal parts, and only the mold core and part of the parts are replaced when a product is replaced.

Description

Gear shaft cold extrusion die

Technical Field

The utility model relates to a cold extrusion die of mechanical transmission part, especially a gear shaft cold extrusion die.

Background

The gear shaft is a precision transmission part with a special structure in mechanical transmission, and the gear shaft not only needs to transmit motion and power, but also needs to have long-term stable reliability and long service life. The traditional manufacturing process of the gear shaft is hot forging blank machining, and is characterized by low production efficiency, low material utilization rate, severe influence on the bending fatigue strength of the gear shaft after the material fiber tissue is cut off, and more obvious reliability on the gear shaft with high speed, heavy load and less teeth number. The investment of process equipment and a cutter is large, based on the characteristics, the gear shaft is manufactured by adopting an extrusion die and a partial cutting mode, and the key point is the design and the manufacture of the die. The gear shaft has a complex structure, a gear and a spline are provided, and the position degree and the geometric precision between the two structures must be ensured; meanwhile, the gear module is large, the tooth crest width is small, a margin needs to be left in a tooth crest circle, and the tooth part needs to be filled during extrusion.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: overcomes the defects in the prior art and provides a gear shaft cold extrusion die.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a cold extrusion die of tooth axle, the components of a whole that can function independently structure for having last mould and lower mould is equipped with the guide pillar between last mould and the lower mould, goes up the mould and includes upper die base, upper stress circle and upper die core, fixed upper die base on the upper base, sets up the upper die core on the upper die base, and the lower mould includes die holder, lower base, ejector pin, first lower die core, tooth mould bottom plate, second lower die core and lower stress circle, fixed die holder on the lower base, by supreme ejector pin, second lower die core, tooth mould bottom plate and the first lower die core of setting gradually down on the die holder.

Further, go up the stress circle including setting gradually first stress inner circle and the first stress outer lane in last mold core outside.

Further, the lower stress ring comprises a second stress inner ring and a second stress outer ring which are sequentially arranged on the outer side of the first lower mold core and a third stress inner ring which is arranged on the outer side of the second lower mold core.

Furthermore, the upper mold core and the lower mold core are made of hard alloy, an extrusion cutting edge is arranged at the top of the first lower mold core, the taper angle of the extrusion cutting edge is 150 degrees, and the height of the cutting edge is 6 mm.

The utility model has the advantages that: the utility model has the advantages that the mould can make the blank-making piece to be formed to the maximum extent, the shape is close to the appearance of the extrusion piece, the mould after replacing one lower mould core can make the gear basically formed, the smooth finish of the tooth surface is ensured, and the mould after replacing the other lower mould core can realize the finishing of the tooth part and the extrusion of the spline; except the mold core and part of the parts, other parts are universal parts, and only the mold core and part of the parts are replaced when a product is replaced.

Drawings

The present invention will be further described with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view after the utility model changes a lower mold core.

Fig. 3 is a schematic structural view of the present invention after another lower mold core is replaced.

In the figure: 1. the novel die comprises a guide post, 2 parts of an upper die holder, 3 parts of an upper base, 4 parts of an upper die core, 5 parts of a lower die holder, 6 parts of a lower base, 7 parts of an ejector rod, 8 parts of a first lower die core, 9 parts of a tooth die bottom plate, 10 parts of a second lower die core, 11 parts of a first stress inner ring, 12 parts of a first stress outer ring, 13 parts of a second stress inner ring, 14 parts of a second stress outer ring and 15 parts of a third stress inner ring.

Detailed Description

The invention will now be further described with reference to the accompanying drawings. The drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1, a tooth axle cold extrusion die of this embodiment, the mould is for having the components of a whole that can function independently structure of last mould and lower mould, go up and be equipped with guide pillar 1 between mould and the lower mould, it includes upper die base 2, upper base 3, upper stress circle and upper die core 4 to go up the mould, the last fixed upper die base 2 that goes up base 3, set up upper die core 4 on the upper die base 2, the lower mould includes die holder 5, lower base 6, ejector pin 7, first lower die core 8, tooth mould bottom plate 9, second lower die core 10 and lower stress circle, fixed die holder 5 on the lower base 6, ejector pin 7, second lower die core 10, tooth mould bottom plate 9 and first lower die core 8 set gradually from bottom to top on the die holder 5. The upper stress ring comprises a first stress inner ring 11 and a first stress outer ring 12 which are sequentially arranged on the outer side of the upper mold core 4. The lower stress ring comprises a second stress inner ring 13 and a second stress outer ring 14 which are arranged on the outer side of the first lower mold core 8 in sequence, and a third stress inner ring 15 arranged on the outer side of the second lower mold core 10.

In this embodiment, go up the mould core 4 and all adopt carbide with lower mould core, 8 tops of first mould core are equipped with the extrusion blade down, and extrusion blade taper angle is 150, and the blade height is 6 mm. .

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable people skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a gear shaft cold extrusion die which characterized in that: the die is a split structure with an upper die and a lower die, a guide pillar (1) is arranged between the upper die and the lower die, the upper die comprises an upper die base (2), an upper base (3), an upper stress ring and an upper die core (4), the upper base (3) is fixed with the upper die base (2), the upper die core (4) is arranged on the upper die base (2), the lower die comprises a lower die base (5), a lower base (6), an ejector rod (7), a first lower die core (8), a tooth die bottom plate (9), a second lower die core (10) and a lower stress ring, the lower base (6) is fixed with the lower die base (5), and the ejector rod (7), the second lower die core (10), the tooth die bottom plate (9) and the first lower die core (8) are sequentially arranged on the lower die base.

2. The gear shaft cold extrusion die according to claim 1, wherein: the upper stress ring comprises a first stress inner ring (11) and a first stress outer ring (12) which are sequentially arranged on the outer side of the upper mold core (4).

3. The gear shaft cold extrusion die according to claim 1, wherein: the lower stress ring comprises a second stress inner ring (13) and a second stress outer ring (14) which are sequentially arranged on the outer side of the first lower mold core (8) and a third stress inner ring (15) which is arranged on the outer side of the second lower mold core (10).

4. The gear shaft cold extrusion die according to claim 1, wherein: go up mold core (4) and lower mold core and all adopt carbide, first mold core (8) top is equipped with the extrusion blade, and extrusion blade cone angle is 150, and the blade height is 6 mm.