CN217775463U

CN217775463U - Closed forging die for bevel gear

Info

Publication number: CN217775463U
Application number: CN202121617773.6U
Authority: CN
Inventors: 刘建; 王东
Original assignee: Sichuan Zhongyou Machinery Co ltd
Current assignee: Sichuan Zhongyou Machinery Co ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2022-11-11
Anticipated expiration: 2031-07-16

Abstract

The utility model belongs to bevel gear forges the mould field, relates to bevel gear's block forging mould structural improvement, specifically provides a bevel gear's block forging mould, including last mould and lower mould, its characterized in that: go up the mould bottom and be equipped with the die cavity, the lower mould top is equipped with down the die cavity, go up the die cavity with the die cavity is equipped with the opening that the direction is relative down, and the two forms jointly and is used for the fashioned shaping chamber of bevel gear, shaping chamber intercommunication has one and is used for carminative exhaust hole, has the gaseous fashioned beneficial effect of bevel gear in order to avoid influencing of the shaping intracavity of discharge.

Description

Closed forging die for bevel gear

Technical Field

The utility model belongs to bevel gear forges the mould field, concretely relates to bevel gear's block forging mould structural improvement.

Background

The closed forging is a forging method for driving a punch or a die cavity to enable materials to mainly flow in a lateral extrusion deformation mode and enter a die space arranged on the side face to produce a radial forge piece with a protruding portion.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can be with the occlusive forging mould of the gaseous exhaust bevel gear in the shaping intracavity.

In order to realize the purpose of the utility model, the utility model adopts the technical proposal that:

the utility model provides a closed forging mould of bevel gear, includes mould and lower mould, its characterized in that: the bevel gear forming die is characterized in that an upper die cavity is arranged at the bottom of the upper die, a lower die cavity is arranged at the top of the lower die, openings in opposite directions are formed in the upper die cavity and the lower die cavity, the upper die cavity and the lower die cavity jointly form a forming cavity for forming a bevel gear, and the forming cavity is communicated with an exhaust hole for exhausting air.

Furthermore, the exhaust hole is formed in the upper die and communicated with the upper die cavity.

Furthermore, the upper cavity is matched with the tooth part of the bevel gear, and the lower cavity is matched with the shaft part of the bevel gear.

Furthermore, the upper die comprises an upper die base and an upper die core arranged in the upper die base, the upper die cavity is arranged in the upper die core, the exhaust holes are formed in the side surface of the upper die core, and an exhaust groove communicated with the exhaust holes is formed in the outer side surface of the upper die core.

Furthermore, the upper mold core is connected with the upper mold base through an upper mold sleeve, the upper mold sleeve is sleeved on the upper mold core, and an exhaust cavity is formed between the exhaust groove and the inner side surface of the upper mold sleeve.

Further, the exhaust hole is obliquely arranged, and one end, far away from the forming cavity, of the exhaust hole faces upwards.

Further, the lower die comprises a lower die base and a lower die core arranged in the lower die base, the lower die cavity is arranged in the lower die core, and the lower die core is connected with the lower die base through a lower die sleeve.

Furthermore, the upper die is arranged above the lower die, and the top of the upper die is provided with a mounting end for connecting stamping equipment.

The utility model discloses following beneficial effect has: the forming cavity is communicated with an exhaust hole, so that redundant gas is exhausted from the exhaust hole during closed forging, incomplete forming of the metal blank caused by overlarge air pressure in the forming cavity is avoided, the phenomenon of closed forging air explosion is solved, the service life of the die is prolonged, and the forming quality of the metal blank is greatly improved.

Drawings

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

FIG. 2 is an enlarged schematic view of the point A in FIG. 1;

fig. 3 is a schematic view of a bevel gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to fig. 1 to 3 of the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The utility model provides a closed forging mould of bevel gear, includes mould and lower mould, its characterized in that: the bevel gear forming die is characterized in that an upper die cavity is arranged at the bottom of the upper die, a lower die cavity is arranged at the top of the lower die, openings in opposite directions are formed in the upper die cavity and the lower die cavity, the upper die cavity and the lower die cavity form a forming cavity 5 for forming a bevel gear 10, and the forming cavity is communicated with an exhaust hole 6 for exhausting.

Go up the opening of die cavity down, the opening of die cavity down is up, the two opening position corresponds mutually, and the terminal surface butt flushes, when the closed forging, the metal blank in the die cavity 5 receives extrusion deformation, atmospheric pressure and then the grow in the die cavity 5, unnecessary gas just discharges from exhaust hole 6, avoided die cavity 5 because atmospheric pressure leads to the metal blank shaping incomplete too greatly, the phenomenon of closed forging gas explosion has been solved, not only increased mould life, metal blank shaping quality has still been improved greatly.

Further, the exhaust hole 6 is formed in the upper die and communicated with the upper die cavity.

Further, the upper cavity is matched with a tooth portion of the bevel gear 10, and the lower cavity is matched with a shaft portion of the bevel gear 10.

As shown in fig. 3, the bevel gear 10 includes a tooth portion and a shaft portion, the tooth portion is disposed on the top of the shaft portion, and the tooth portion and the shaft portion are integrally formed, so that in actual closed forging, the deformation amount of the tooth portion corresponding to the upper cavity is large, and the air pressure change is large, so that the vent hole 6 is disposed on the upper mold core 2, is communicated with the upper cavity, and is further communicated with the whole forming cavity 5, and the excess gas can be sufficiently discharged, so that the tooth portion with large deformation amount can be forged and formed more easily.

Further, go up the mould and include the upper die base and set up last mould core 2 in the upper die base, go up the die cavity set up in go up in the mould core 2, exhaust hole 6 is seted up go up the side of mould core 2, it is equipped with one and communicates to go up 2 lateral surfaces of mould core exhaust groove 7 of hole 6.

As shown in fig. 2, the upper cavity is provided at the bottom of the upper core 2, and excess gas is pushed out of the vent hole 6 into the vent groove 7 during closed forging.

Further, the upper mold core 2 is connected with the upper mold base through an upper mold sleeve 8, the upper mold sleeve 8 is sleeved on the upper mold core 2, and an exhaust cavity is formed between the exhaust groove 7 and the inner side surface of the upper mold sleeve 8.

Exhaust groove 7 sets up on the radial lateral surface of last mold core, goes up the top of mold core 2 and is equipped with the breach with exhaust groove 7 intercommunication, and the exhaust chamber is the top promptly and is equipped with the open-ended structure, and unnecessary gas is extruded to the exhaust intracavity from exhaust hole 6 to through the opening at its top, and finally discharge in the clearance between last mold core 2 and the last mold sleeve 8, realized unnecessary gaseous discharge.

Further, the exhaust hole 6 is obliquely arranged, and one end, far away from the forming cavity, of the exhaust hole faces upwards.

The one end height that exhaust hole 6 intercommunication becomes the die cavity is less than its one end height of keeping away from the die cavity, and the exhaust hole 6 that the slope set up can prevent that the metal stock from flowing into to during the concrete implementation, with exhaust hole 6 setting be the less micropore of diameter, in order to avoid influencing the metal stock shaping.

Further, the lower die comprises a lower die base and a lower die core 3 arranged in the lower die base, the lower die cavity is arranged in the lower die core 3, and the lower die core 3 is connected with the lower die base through a lower die sleeve 9.

Specifically, the lower mold core 3 and the upper mold core 2 are both of a hollow structure, a lower ejector rod 4 is arranged in the lower mold core 3, the part between the end face of the top opening of the lower mold core 3 and the end face of the top of the lower ejector rod 4 is a lower cavity, the lower ejector rod 4 is fixedly connected with a lower mold base, a lower mold sleeve 9 is in screw connection with the lower mold base through a lower connecting piece, an upper ejector rod 1 is arranged in the upper mold core 2, the part between the end face of the bottom of the upper ejector rod 1 and the end face of the bottom opening of the upper mold core 2 is an upper cavity, the upper ejector rod 1 is fixedly connected with an upper mold base, and an upper mold sleeve 8 is in screw connection with the upper mold base through an upper connecting piece.

The top end surface of the lower die core 3 is abutted to the top end surface of the upper die core 2 and is horizontal, and the design without the flash groove enables the surface of the formed bevel gear 10 to be smooth and attractive.

The stamping equipment can be a machine tool, an impact machine or a hydraulic machine in the prior art, for example, the machine tool, the mounting end of the top of the upper die is connected with a sliding device of the machine tool through a flange, the lower die is fixed on a lower backing plate of the machine tool, and the positioning is realized by positioning pins of the upper die and the lower die.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various changes, modifications, amendments, and substitutions made by the technical solutions of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.

Claims

1. The utility model provides a closed forging mould of bevel gear, includes mould and lower mould, its characterized in that: the bevel gear forming die is characterized in that an upper die cavity is arranged at the bottom of the upper die, a lower die cavity is arranged at the top of the lower die, the upper die cavity and the lower die cavity are provided with openings in opposite directions, the upper die cavity and the lower die cavity jointly form a forming cavity (5) for forming a bevel gear (10), and the forming cavity is communicated with an exhaust hole (6) for exhausting.

2. The closed forging die for bevel gears according to claim 1, wherein: the exhaust hole (6) is formed in the upper die and communicated with the upper die cavity.

3. The closed forging die for bevel gears according to claim 2, wherein: the upper cavity is matched with a tooth part of the bevel gear (10), and the lower cavity is matched with a shaft part of the bevel gear (10).

4. The closed forging die for bevel gears according to claim 2, wherein: go up the mould and include the upper die base and set up last mould core (2) in the upper die base, go up the die cavity set up in go up in mould core (2), exhaust hole (6) are seted up go up the side of mould core (2), it is equipped with a intercommunication to go up mould core (2) lateral surface exhaust groove (7) of exhaust hole (6).

5. The closed forging die for bevel gears according to claim 4, wherein: the upper mold core (2) is connected with the upper mold base through an upper mold sleeve (8), the upper mold sleeve (8) is sleeved on the upper mold core (2), and an exhaust cavity is formed between the exhaust groove (7) and the inner side surface of the upper mold sleeve (8).

6. The closed forging die for bevel gears according to any one of claims 1 to 5, wherein: exhaust hole (6) slope sets up, and its one end of keeping away from the shaping chamber is up.

7. The closed forging die for bevel gears according to claim 1, wherein: the lower die comprises a lower die base and a lower die core (3) arranged in the lower die base, the lower die cavity is arranged in the lower die core (3), and the lower die core (3) is connected with the lower die base through a lower die sleeve (9).

8. The closed forging die for bevel gears according to claim 1, wherein: the upper die is arranged above the lower die, and the top of the upper die is provided with a mounting end used for connecting stamping equipment.