CN110154291B

CN110154291B - Gear blank making mold

Info

Publication number: CN110154291B
Application number: CN201910435519.5A
Authority: CN
Inventors: 洪长兴
Original assignee: Zhongshan Jijia Transmission Technology Co ltd
Current assignee: ZHONGSHAN JIJIA TRANSMISSION TECHNOLOGY Co.,Ltd.
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2021-06-25
Anticipated expiration: 2039-05-23
Also published as: CN110154291A

Abstract

The invention discloses a gear blank making die, which structurally comprises a bottom die holder, a bottom die and a gear die, wherein more than two tooth sockets are arranged on the gear die, the gear die is arranged on the bottom die, the bottom die holder and the bottom die are integrated, a side groove and a push rod are arranged between the bottom die holder and the bottom die, the side groove and the push rod are in clearance fit, and are communicated with a cooling groove in the tooth sockets, the push rod and the side groove are matched in the bottom die together, the side groove and a pressure cavity are positioned in the same plane, the push rod is used for horizontally pushing to be in contact with a connecting lug, so that the air pressure in the pressure cavity is continuously extruded, a piston sealed in a tooth socket cavity is upwards pushed by matching with the continuously extruded pressure, the tooth sockets sealed by the piston and a steel sheet mainly provide a forming effect for the teeth of the gear, and when the piston is pushed, the teeth fixed in the tooth sockets are taken out, changing the pulling force into pushing force realizes that the saw teeth cannot be broken on the die when being brought.

Description

Gear blank making mold

Technical Field

The invention relates to the technical field of gear manufacturing, in particular to a gear blank manufacturing mold.

Background

In short, the die is a tool for manufacturing a molded article, the tool is composed of various parts, different dies are composed of different parts, the processing of the shape of the article is realized mainly by changing the physical state of the molded material, and the gear blank manufacturing die is a die for manufacturing a gear.

Since the teeth of the small gear are small in size, the gear is easy to be taken up and even broken on a mold during demolding due to the thin and thin teeth, and the teeth broken on the mold are time-consuming to clean.

Disclosure of Invention

In order to solve the problems, the invention provides a gear blank making mold.

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a gear blanking mould, its structure includes die holder, die block, gear mould, set up the tooth's socket more than two on the gear mould install the gear mould on the die block, die holder and die block integration be equipped with side groove and push rod between die holder and the die block, adopt clearance fit between side groove and the push rod, the cooling bath in side groove and the tooth's socket communicates with each other, the inside one end of die block is all cooperated to have a spacing base in the push rod is arranged in to the push rod, is equipped with spacing in the spacing gasket of push rod horizontal axis at spacing base, the tooth's socket surface is being wrapped up in to the cooling bath.

As a further improvement of the invention, a piston is arranged in the tooth socket, one surface of the piston, which is in contact with the cavity of the tooth socket, is attached with a steel sheet, and a heat insulation layer is arranged between the steel sheet and the piston, so that the piston is prevented from being in direct contact with a pouring material, and the piston is protected from being damaged by high temperature.

As a further improvement of the invention, the cavity of the tooth groove and a pressure cavity matched with the push rod form a right-angle L-shaped structure, and the push rod and the first pressure piston are integrated.

As a further improvement of the present invention, a first pressure piston, a second pressure piston, a connecting projection and a piston are fitted in the pressure chamber, the second pressure piston is provided with the connecting projection, the first pressure piston is in contact with the connecting projection of the second pressure piston, and the second pressure piston is indirectly fitted with the piston.

As a further improvement of the invention, pushing blocks are fixed on the extending shafts on two sides of the first pressure piston, are of an oval structure and are completely attached to one end, close to the push rod, of the cooling groove.

As a further development of the invention, the gap remaining between the first pressure piston and the second pressure piston is two thirds of the tooth space.

As a further improvement of the invention, the length of the first pressure piston is smaller than that of the second pressure piston, an air outlet gap is reserved between the two sides of the first pressure piston and a pressure chamber, the pressure chamber is sealed by the second pressure piston, the pressure chamber between the second pressure piston and the piston is filled with a standard atmospheric pressure, and the reserved gap can prevent the first pressure piston from extruding to the second pressure piston when being pushed.

As a further improvement of the invention, the cooling groove is filled with coolant, and the coolant is at the same level with the piston in the original state, so that the coolant can be filled to the whole tooth groove when the coolant rises.

As a further development of the invention, the direction of the gas flow generated on both sides of the first pressure piston is diffused out of the pressure chamber.

Compared with the prior art, the invention has the following beneficial effects:

1. the push rod and the side groove are matched in the bottom die together, the side groove and the pressure cavity are in the same plane, the push force generated by the push rod is horizontally pushed to contact with the connecting bump, air pressure in the pressure cavity is continuously extruded, the piston sealed in the tooth socket cavity is upwards pushed by matching with the continuously extruded pressure, the tooth socket sealed by the piston and the steel sheet mainly provides a forming effect for the saw teeth of the gear, when the piston is pushed, the saw teeth fixed in the tooth socket are taken out, and the saw teeth cannot be broken on the die when the saw teeth are taken out by changing the pulling force into the pushing force.

2. The outer surface of the tooth socket is wrapped with the cooling groove, wherein the cooling groove is mainly filled with a refrigerant to realize the cooling effect of the sawteeth formed in the tooth socket, so that the comprehensive cooling in the tooth socket is realized.

3. The piston is completely attached to the bottom of the inner cavity of the tooth socket, so that omission can be reduced when the piston is taken up, the stress on the bottom of the formed sawtooth is uniform, the stress of the balance gear cannot be inclined during taking out, and the damage rate of a gear blank is reduced.

4. The cooling groove of the invention respectively coacts with the outer surface of the tooth socket and the outer surface of the pressure cavity, wherein the refrigerant firstly contacts the outer surface of the pressure cavity, the push rod is matched with the push blocks fixed at two sides of the first pressure piston to push the extruded refrigerant from the pressure cavity to the tooth socket direction, because the temperature of the bottom layer of the tooth socket is higher than that of the top end, the bottommost layer is firstly cooled when the refrigerant rises from a low position to a high position, and the heat of the bottom layer is fully taken away in the process of continuous rising of the refrigerant to improve the cooling efficiency in the tooth socket, thereby avoiding the problem that the sawteeth adhered at the bottom part due to.

5. The pushing block is completely attached to the cooling groove, and the attaching position is matched with the rubber sealing strip, so that the refrigerant pushed by the pushing block can completely fill the whole tooth groove, and the cooling effect cannot be influenced even if small careless refrigerant is not taken away.

6. According to the invention, the push rod is in clearance fit with the pressure cavity, the push rod can be arranged in the pressure cavity based on the existence of the clearance in the propelling process, and after the tooth grooves are completely filled with the refrigerant at a certain time of the stroke of the first pressure piston to achieve cooling, the pushing of the second pressure piston can be realized, so that the effect of pushing out the gear is achieved.

Drawings

Fig. 1 is a schematic structural view of a gear blank making mold according to the present invention.

Fig. 2 is a schematic side view of the bottom mold according to the present invention.

Fig. 3 is a schematic structural view of the limiting base of the present invention.

FIG. 4 is a front view of the gear mold according to the present invention.

FIG. 5 is a schematic view of the inner side structure of the push rod engaging tooth slot of the present invention.

Fig. 6 is a schematic diagram of the structure of the working dynamics of fig. 5 according to the present invention.

In the figure: the die comprises a bottom die seat-1, a bottom die-2, a gear die-3, a tooth groove-31, a side groove-11, a push rod-12, a cooling groove-311, a limiting base-121, a limiting gasket-21 a, a piston-312, a pressure cavity-122, a first pressure piston-123, a second pressure piston-22 a, an engaging bump-22 b and a push block-21 b.

Detailed Description

In order to make the technical means, the creation features, the achievement objects and the effects of the present invention easy to understand, fig. 1 to fig. 6 schematically show the structure of a gear blank making mold according to an embodiment of the present invention, and the present invention will be further described with reference to the following detailed description.

In the description of the present invention, it is to be understood that the terms "central," "lateral," "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "side," and the like, as used herein, are used in an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Examples

As shown in fig. 1 to 6, the invention provides a gear blank making mold, which structurally comprises a base mold seat 1, a base mold 2 and a gear mold 3, wherein the gear mold 3 is provided with more than two tooth sockets 31, the base mold 2 is provided with the gear mold 3, the base mold seat 1 and the base mold 2 are integrated, a side groove 11 and a push rod 12 are arranged between the base mold seat 1 and the base mold 2, the side groove 11 and the push rod 12 are in clearance fit, the side groove 11 is communicated with a cooling groove 311 in the tooth sockets 31, one end of the push rod 12, which is arranged in the base mold 2, is matched with a limiting base 121, the limiting base 121 is provided with a limiting gasket 21a limited on a horizontal shaft of the push rod 12, and the cooling groove 311 wraps the outer surface of the tooth sockets 31.

The piston 312 is arranged in the tooth socket 31, one surface of the piston 312, which is in contact with the cavity of the tooth socket 31, is attached with a steel sheet, and a heat insulation layer is arranged between the steel sheet and the piston 312, so that the piston 312 is prevented from being in direct contact with a pouring material, and the piston 312 is protected from being damaged by high temperature.

The cavity of the tooth slot 31 and the pressure chamber 122 matched with the push rod 12 form a right-angle L-shaped structure, and the push rod 12 and the first pressure piston 123 are integrated.

The first pressure piston 123, the second pressure piston 22a, the engaging projection 22b and the piston 312 are matched in the pressure chamber 122, the engaging projection 22b is installed on the second pressure piston 22a, the first pressure piston 123 is in contact with the engaging projection 22b of the second pressure piston 22a, and the second pressure piston 22a is indirectly matched with the piston 312.

The extending shafts on both sides of the first pressure piston 123 are fixed with pushing blocks 21b, and the pushing blocks 21b have an elliptical structure and are completely attached to one end of the cooling slot 311 close to the push rod 12.

The gap remaining between the first pressure piston 123 and the second pressure piston 22a is two thirds of the cavity of the tooth groove 31.

The length of the first pressure piston 123 is smaller than that of the second pressure piston 22a, an air outlet gap is reserved between the two sides of the first pressure piston 123 and the pressure chamber 122, the pressure chamber 122 is sealed by the second pressure piston 22a, a standard atmospheric pressure is filled in the pressure chamber 122 between the second pressure piston 22a and the piston 312, and the reserved gap can prevent the first pressure piston 123 from extruding to the second pressure piston 22a when pushing.

The interior of the cooling slot 311 is filled with a coolant, which is at the same level as the piston 312 in its original state, to ensure that the coolant 311 is just filled into the entire tooth slot 31 when it rises.

The direction of the air flow generated at both sides of the first pressure piston 123 is diffused out of the pressure chamber 122.

The working principle of the gear blank making mold in the above technical scheme is explained as follows:

in the process of producing the gear, the model which needs to be formed into the gear needs to be used in a mould necessarily, the material in the gear mould is poured into the gear mould 3, then the gear mould 3 is closed, then the heating forming is carried out, after the forming, the blank body needs to be cooled and taken out, when the small gear is manufactured, the problem that the gear saw teeth are broken in the mould due to incomplete cooling and poor taking out at the bottommost layer of the saw teeth is solved, therefore, a cooling groove 311 is arranged in each tooth groove 31, when the heating is finished, a user extrudes a push rod 12 exposed at the side edge of the mould inwards, at the moment, a first pressure piston 123 fixed in the push rod 12 is pushed along a pressure cavity 122, a push block 21b fixed by the first pressure piston 123 moves synchronously, because the push block 21b is closed in the cooling groove 311, and when the cooling groove 311 is filled with the refrigerant, the refrigerant moves from low to high along with the movement of the push block 21b until the whole, after the gear slot 31 is cooled, the first pressure piston 123 props against the engaging projection 22b installed in the second pressure piston 22a, the push rod 12 is continuously pushed inwards, so that the second pressure piston 22a extrudes the pressure cavity 122, the piston 312 matched between the gear slot 31 and the pressure cavity 122 is extruded by pressure, the sawteeth arranged in the gear slot 31 are taken out, the complete mold stripping of the gear is realized, and the damage rate of the gear blank is reduced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a gear blanking mould, its structure includes die holder (1), die holder (2), gear mould (3), its characterized in that: the die is characterized in that more than two tooth sockets (31) are formed in the gear die (3), the gear die (3) is installed on the bottom die (2), the bottom die holder (1) and the bottom die (2) are integrated, a side groove (11) and a push rod (12) are arranged between the bottom die holder (1) and the bottom die (2), the side groove (11) and the push rod (12) are in clearance fit, the side groove (11) is communicated with a cooling groove (311) in the tooth sockets (31), one end, arranged inside the bottom die (2), of the push rod (12) is matched with a limiting base (121), a limiting gasket (21a) limited on a horizontal shaft of the push rod (12) is arranged on the limiting base (121), and the outer surface of the tooth sockets (31) is wrapped by the cooling groove (311); a piston (312) is arranged in the tooth groove (31), and a steel sheet is attached to one surface, contacting the cavity of the tooth groove (31), of the piston (312); the cavity of the tooth groove (31) and a pressure cavity (122) matched with the push rod (12) form a right-angled L-shaped structure, and the push rod (12) and the first pressure piston (123) are integrated; a first pressure piston (123), a second pressure piston (22a), a connecting lug (22b) and a piston (312) are matched in the pressure cavity (122), the connecting lug (22b) is installed on the second pressure piston (22a), the first pressure piston (123) is in contact with the connecting lug (22b) of the second pressure piston (22a), and the second pressure piston (22a) is indirectly matched with the piston (312); push blocks (21b) are fixed on the extending shafts on the two sides of the first pressure piston (123), the push blocks (21b) are of an oval structure, and are completely attached to one end, close to the push rod (12), of the cooling groove (311); the gap reserved between the first pressure piston (123) and the second pressure piston (22a) is two thirds of the cavity of the tooth groove (31); the length of the first pressure piston (123) is smaller than that of the second pressure piston (22a), an air outlet gap is reserved between two sides of the first pressure piston (123) and the pressure cavity (122), and the pressure cavity (122) is sealed through the second pressure piston (22 a); the cooling groove (311) is filled with coolant, and the original state of the coolant is the same as the horizontal plane of the piston (312); the direction of the air flow generated at the two sides of the first pressure piston (123) is diffused to the outside of the pressure cavity (122).

2. The gear blank making mold according to claim 1, wherein: in the process of producing the gear, a mold is necessarily needed for molding the gear into a model of the gear, the material in the gear mold is poured into the gear mold (3), then the gear mold (3) is closed, then the gear mold is heated and molded, after the molding, a blank body needs to be cooled and taken out, when a small gear is manufactured, the problem that the gear saw teeth are broken in the mold due to incomplete cooling and poor taking out of the lowermost layer of the saw teeth is solved, on the basis that a cooling groove (311) is arranged in each tooth groove (31), when the heating is finished, a push rod (12) exposed at the side of the mold is pressed inwards by a user, at the moment, a first pressure piston (123) fixed in the push rod (12) pushes along a pressure cavity (122), a push block (21b) fixed by the first pressure piston (123) moves synchronously, and the push block (21b) is closed in the cooling groove (311), when the cooling groove (311) is filled with the refrigerant, the refrigerant moves from low to high until the refrigerant is complete along with the movement of the push block (21b), after the tooth groove (31) is cooled, the first pressure piston (123) props against the connecting lug (22b) installed in the second pressure piston (22a), the push rod (12) is continuously pushed inwards, so that the second pressure piston (22a) extrudes the pressure cavity (122), the piston (312) matched between the tooth groove (31) and the pressure cavity (122) is extruded by pressure, the sawteeth arranged in the tooth groove (31) are taken out, the complete demolding of the gear is realized, and the damage rate of the gear blank is reduced.