CN114289717A

CN114289717A - Gear preparation mould with annular groove

Info

Publication number: CN114289717A
Application number: CN202111384059.1A
Authority: CN
Inventors: 杨澜; 曾仙逸; 曾念; 彭晓燕; 曾舟山; 曹勇辉; 曾岱山; 曹雄辉; 陈晨
Original assignee: Kingson Powder Metallurgy Stainless Steel Co ltd
Current assignee: Kingson Powder Metallurgy Stainless Steel Co ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-04-08

Abstract

The invention discloses a gear preparation mold with an annular groove, which comprises a first mold and a second mold, wherein the annular groove mold is arranged between the first mold and the second mold, a gasket is movably arranged between the first mold and the second mold, and the gasket is arranged outside the position of the annular groove mold and clings to the annular groove mold. The invention can effectively solve the problem of inward inclination of the sawtooth part close to the annular groove in the gear manufacturing process with the annular groove, and has the advantages of simple method, convenient operation and lower cost.

Description

Gear preparation mould with annular groove

Technical Field

The invention relates to the technical field of powder metallurgy, in particular to a gear manufacturing die with an annular groove.

Background

At present, most gears are cast by a casting process, and the casting process has the advantages of time saving, simplicity and economization for regular gears, but is not practical for irregular gears because the irregular gears are difficult to demould after casting, and the irregular parts are easily damaged by forced demoulding. Therefore, the powder metallurgy forming technology which is popular at present has advantages for irregular gears.

Powder metallurgy forming is one of the basic processes in powder metallurgy production, with the aim of forming a semifinished product with a predetermined geometry, size, compactness and strength from a loose (metal, ceramic, or other material) powder by pressing in a mould, and then obtaining a semifinished blank by demoulding. The semi-finished product is at least required to be changed into a finished product through a subsequent sintering process, but when the sintering process is carried out, the sawtooth part of the gear close to the annular groove is easy to tilt or tilt inwards, particularly for irregular gears with annular grooves, such as reels of fishing rods, the sawtooth part is easy to shift, the tilting phenomenon is well treated, the irregular gears can be regulated through knocking forging or extrusion, but the problem of tilting and the like is difficult to solve, and the defects are required to be avoided in the preparation process of the irregular gears with annular grooves. Therefore, further improvement of the structure of the gear manufacturing mold is required.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a gear preparation mold with an annular groove, which can effectively solve the problem that a sawtooth part close to the annular groove is inclined inwards in the gear preparation process with the annular groove, and has the advantages of simple method, convenient operation and lower cost.

In order to solve the technical problems, the technical scheme provided by the invention is as follows: a gear preparation mold with an annular groove comprises a first mold and a second mold, wherein an annular groove mold is arranged between the first mold and the second mold, a gasket is movably arranged between the first mold and the second mold, and the gasket is arranged outside the position of the annular groove mold and clings to the annular groove mold.

The invention provides a further technical scheme as follows: the die is characterized in that a die groove of a sawtooth part is formed in the die I, a die groove of a non-sawtooth part or a die groove of a sawtooth part is formed in the die II, the annular groove die is a hollow pipe for connecting the sawtooth part and the non-sawtooth part, the gasket is sleeved in the hollow pipe, and the outer diameter of the gasket is the same as the inner diameter of the hollow pipe.

Furthermore, the annular groove die is detachably connected with the die groove of the non-sawtooth part.

Further, the annular groove die is formed by splicing two semi-circular tubes, and the splicing mode of the two semi-circular tubes is that a bulge is connected with a groove in a buckling mode.

Furthermore, the gasket is composed of a plurality of ceramic plates which are connected end to form an annular structure.

Further, the gasket is prepared by adopting a powder metallurgy forming process.

Further, the washer is not removed from the gear blank until after the sintering process of the gear is completed.

Furthermore, the first die, the second die and the annular groove die are all made of non-metal materials.

Furthermore, the first die and the second die are only used for preparing a blank of the gear, and after the blank is prepared, the blank needs to be removed from the blank before sintering, so that the blank can be sintered.

Compared with the prior art, the invention has the advantages that: the gasket is arranged at the position of the annular groove die, so that the side with the sawteeth is not easy to incline towards the annular groove in the preparation process of the gear under the supporting action of the gasket, the smoothness of the sawteeth close to one side surface of the annular groove is ensured to be better, the gasket is not required to be removed after the preparation, the sintering process is carried out along with a gear blank, and the gasket is removed after the sintering process is finished, so that the problem that the sawteeth close to the annular groove incline inwards in the preparation process of the gear with the annular groove can be effectively solved.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the present invention;

FIG. 2 is a structural view of a gear in embodiment 1 of the invention;

FIG. 3 is a schematic view of the structure of a gasket in embodiment 1 of the present invention;

fig. 4 is a schematic structural view of the gasket and the annular groove mold in embodiment 1 of the present invention.

Illustration of the drawings:

1. a first mould; 2. a second die; 3. an annular groove mold; 4. a gasket; 5. a gear.

Detailed Description

In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.

Referring to fig. 1-4, a gear manufacturing mold with an annular groove comprises a first mold 1 and a second mold 2, an annular groove mold 3 is arranged between the first mold 1 and the second mold 2, a gasket 4 is movably arranged between the first mold 1 and the second mold 2, the gasket 4 is arranged outside the annular groove mold 3 and clings to the annular groove mold 3, and the gasket 4 mainly plays a role in supporting a gear 5 in a manufacturing process, and particularly plays a role in supporting a toothed part of the gear 5.

In the embodiment, the die cavity of the sawtooth part is arranged on the die 1, the die cavity of the non-sawtooth part is arranged on the die 2, the annular groove die 3 is a hollow pipe for connecting the sawtooth part with the non-sawtooth part, the gasket 4 is sleeved in the hollow pipe, the outer diameter of the gasket 4 is the same as the inner diameter of the hollow pipe, therefore, after the gear is demoulded, the gasket 4 does not need to be removed after the annular groove die 3 is removed, and the gasket 4 is still in close contact with the annular groove of the gear at the moment, so that the sawtooth part of the gear 5 can be effectively supported powerfully, the gasket 4 can be sintered along with the blank of the gear 5, after sintering is finished, the gasket 4 is removed, the problem that the sawtooth part close to the annular groove is inclined inwards in the preparation process of the gear 5 with the annular groove can be effectively solved, the method is simple and convenient to operate, the cost is low. If the pipe wall of hollow tube is than under thin condition, the outside at the hollow tube can also be established to packing ring 4, because the pipe wall of hollow tube is than thin, after removing the hollow tube, the gap between the annular groove of packing ring 4 and gear 5 is also smaller, and this gap can not influence the supporting role of packing ring, can ignore.

In this embodiment, the annular groove mold 3 is detachably connected to the mold cavity of the non-serrated portion, such as by bonding or fastening, which facilitates the preparation of the mold and the removal of the mold. Annular groove mould 3 utensil adopts the concatenation of two parts semicircle pipings to form, makes things convenient for demolising the process in later stage quick, laborsaving going on, and the process of placing of the packing ring 4 of also being convenient for goes on smoothly, and the concatenation mode between them adopts the protruding lock mode with the recess to be connected, and the reliability of connecting is higher, and convenient connection.

In this embodiment, the gasket 4 is composed of a plurality of ceramic plates connected end to form an annular structure, the gasket 4 is composed of at least two ceramic plates, or three, four or more ceramic plates, the number of the ceramic plates is related to the radius of the gear, the larger the radius of the gear is, the number of the ceramic plates can be set to be a plurality of ceramic plates, and the final demolding of the gasket 4 is facilitated. The gasket 4 is manufactured by a powder metallurgy forming process, and the gasket is generally sintered and formed firstly and then used. The washer 4 is removed from the blank of the gear 5 after the sintering process of the gear 5 is completed, and can also play a role in strongly supporting the saw tooth part on one side or two sides of the annular groove during the sintering process of the gear 5.

In this embodiment, the first mold 1, the second mold 2 and the annular groove mold 3 are all made of non-metal materials, and in the demolding process, if demolding is not easy, the molds can be damaged conveniently to perform demolding. The first die 1 and the second die 2 are only used for preparing a blank of the gear 5, and after the blank is prepared, the blank needs to be removed from the blank before sintering, and the blank can be sintered.

Claims

1. A gear preparation mold with an annular groove comprises a first mold and a second mold, wherein an annular groove mold is arranged between the first mold and the second mold.

2. The mold for preparing a gear according to claim 1, wherein the first mold is provided with a cavity of a serrated portion, the second mold is provided with a cavity of a non-serrated portion or a cavity of a serrated portion, the annular groove mold is a hollow tube connecting the serrated portion and the non-serrated portion, the cushion ring is sleeved inside the hollow tube, and the outer diameter of the cushion ring is the same as the inner diameter of the hollow tube.

3. The mold for preparing a gear according to claim 2, wherein the mold for preparing a ring-shaped groove is detachably connected to the cavity of the non-serration part.

4. The mold for preparing a gear according to claim 3, wherein the mold is formed by splicing two semicircular tubes, and the two semicircular tubes are connected by buckling a protrusion and a groove.

5. The mold for preparing a gear with an annular groove according to any one of claims 1 to 4, wherein the gasket is composed of a plurality of ceramic sheets connected end to form an annular structure.

6. The mold for preparing a gear with an annular groove according to claim 5, wherein the gasket is prepared by a powder metallurgy forming process.

7. An annular grooved gear production mold according to any of claims 1-4, characterized in that the washer is removed from the gear blank after the sintering process of the gear is completed.

8. The mold for preparing a gear with an annular groove according to any one of claims 1 to 4, wherein the first mold, the second mold and the annular groove mold are all made of non-metallic materials.

9. A gear making die with an annular groove according to any one of claims 1 to 4, wherein the first die and the second die are used only for making a blank of a gear, and after the blank is made, the blank is removed from the blank before the blank is sintered, and the blank can be sintered.