CN212857757U

CN212857757U - Die structure for cross pressing of powder metallurgy end face teeth

Info

Publication number: CN212857757U
Application number: CN202021657245.9U
Authority: CN
Inventors: 童延文; 陈建桥
Original assignee: Hangzhou Haixiangda Sensing Technology Co Ltd
Current assignee: Hangzhou Haixiangda Sensing Technology Co Ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-04-02
Anticipated expiration: 2030-08-11

Abstract

The utility model discloses a mould structure of alternately suppressing powder metallurgy end face tooth relates to industrial product mould technical field. The stamping die comprises a toothed ring part and a stamping die rack arranged below the toothed ring part, wherein an outer stamping die is formed by the toothed ring part and the stamping die rack, the stamping die rack is an inner rack which is uniformly distributed, the inner rack extends downwards from the bottom of the toothed ring part, a tooth space is formed between the inner racks, and the tooth space extends to the top of the toothed ring part; the inner die comprises an inner ring and an outer rack arranged on the surface of the inner ring, and the outer rack is matched with the tooth grooves; the inner punch is longer than or equal to the length of the outer punch. The utility model provides a can push the product and extrude the mould structure of guaranteeing that the tooth top that can the product can not the unfilled corner lack of material when having compression stroke and demolding when suppressing the product.

Description

Die structure for cross pressing of powder metallurgy end face teeth

Technical Field

The utility model relates to an industrial mold technical field especially relates to a mould structure of alternately suppressing powder metallurgy end face tooth.

Background

The existing die structure adopts an integrated structure, a circle of die pressing racks are arranged on the lower circumference of a gear ring part, and a product is formed by die pressing of the die pressing racks. The existing die has the following disadvantages: (1) the product tooth part is formed by a forming cavity of a fixed integrated die without a compression stroke, iron powder needs to flow into the die cavity after being extruded from the outside, the flow quantity is limited, and the density of the tooth part, particularly the tooth top part, cannot meet the normal requirement. (2) When the product is demoulded, the product is pulled out from the tooth cavity of the tooth bar of the die stamping die, the tooth top is often in corner cut and material cut phenomena, so that the product is scrapped, the die stamping die is usually required to be stopped for cleaning, and the efficiency is influenced.

Therefore, in order to solve the above technical problem, a new technical solution needs to be proposed to solve the problem. In particular to a die structure for cross-pressing powder metallurgy end face teeth.

Disclosure of Invention

The utility model discloses a solve the mould structure of metallurgical end face tooth current on the market at the product in-process, the product tooth top density of formation can not reach the requirement, and the easy tooth top appears the unfilled corner easily during the drawing of patterns and lacks the technical problem of material, provides a split type mould structure of cross suppression powder metallurgy end face tooth.

The following technical scheme is provided for achieving the purpose: the utility model provides a cross die structure who suppresses powder metallurgy end face tooth, includes ring gear portion and the die rack of setting in the ring gear portion below, ring gear portion and die rack form outer stamping, the interior rack of die rack for evenly laying, interior rack is from ring gear portion bottom downwardly extending, form the tooth's socket between the interior rack, the tooth's socket extends to ring gear portion top. The die structure further comprises an inner die, the inner die comprises an inner ring and an outer rack arranged on the surface of the inner ring, the outer rack is matched with the tooth grooves, and the length of the inner die is longer than or equal to that of the outer die.

Preferably, the inner rack is fixedly disposed in the ring gear portion and extends downward from a bottom of the ring gear portion.

Preferably, the inner racks are fixedly arranged from the bottom of the gear ring portion, and the tooth grooves formed between the inner racks extend into the gear ring portion and extend to the top of the gear ring portion.

Preferably, the inner rack and the outer rack are uniformly distributed in a circumferential shape.

Preferably, the width of the inner rack is gradually reduced from the root to the tip.

Preferably, the inner punch is longer than the length of the outer punch.

The utility model has the advantages that: the utility model discloses a stamping structure of split type setting to set the moulding-die rack to the interior rack of intermittent type formula, and the outer rack that dashes intermittent type formula through interior mould cooperatees, makes the mould have certain compression stroke when the finished product takes shape through dashing the mould to pushing down, makes the product tooth top that takes shape have sufficient metal powder, satisfies the density demand to suppression powder metallurgy end face tooth addendum in the industry.

When the product is demoulded, the inner die punch pushes each tooth top of the product in each tooth socket, so that the product can be smoothly demoulded from the die punch, the problem of corner lacking and material shortage of a product tooth part is solved, the problem of residual die punch tooth root is solved, and the phenomenon of residual material bonding after the product tooth part is demoulded is solved.

Drawings

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

Fig. 2 is an enlarged schematic view of a portion a in fig. 1 according to the present invention.

Fig. 3 is a schematic structural view of the present invention in the split state.

Fig. 4 is a schematic structural view of the tooth end face of the die-pressing product of the present invention.

Wherein:

1. punching an outer die; 11. an inner rack; 12. a rim portion; 13. a tooth socket; 2. punching an inner die; 21. an inner ring; 22. an outer rack; 11a, a tooth valley; 13a, tooth top.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 3, a die structure for cross-compacting powder metallurgy end face teeth comprises a toothed ring portion 12 and a die rack arranged below the toothed ring portion 12, wherein the toothed ring portion 12 and the die rack form an outer punch 1, the die rack is an inner rack 11 uniformly arranged, the inner rack 11 extends downwards from the bottom of the toothed ring portion 12, a tooth space 13 is formed between the inner racks 11, and the tooth space 13 extends to the top of the toothed ring portion 12. The inner rack 11 and the ring gear portion 12 are implemented in various manners, and the inner rack 11 may be fixedly arranged in the ring gear portion 12 and extend downwards from the bottom of the ring gear portion 12, so that the tooth grooves 13 formed between the inner racks 11 naturally extend to the top of the ring gear portion 12; the internal rack 11 may be fixedly disposed from the bottom of the ring gear portion 12, a spline having the same shape as the spline 13 of the internal rack may be disposed in the ring gear portion 12 up to the top of the ring gear portion 12, and the spline in the ring gear portion 12 may be regarded as a natural extension of the spline 13 of the internal rack. The utility model also comprises an inner punch 2, wherein the inner punch 2 comprises an inner ring 21 and an outer rack 22 arranged on the surface of the inner ring 21, and the outer rack 22 is matched with the tooth socket 13; the inner punch 2 is longer than or equal to the length of the outer punch 1, preferably the inner punch 2 is longer than the length of the outer punch 1. The outer tooth bars 22 of the inner punch can be inserted into the outer punch 1 along the tooth grooves of the gear ring part 12, so that the inner punch is matched with the outer punch, and the inner punch can freely move in the outer punch. Interior rack 11 and outer rack 22 are the circumference and evenly lay, and interior rack and outer rack comprise several, and specific number can increase and decrease as required to the width of interior rack 11 along root department to top department reduces gradually, and the tooth's socket 13 looks adaptation that outer rack 22's shape and inner rack 11 formed, as shown in fig. 2.

As shown in fig. 4, the press-formed product includes crests 13a and valleys 11 a. The tooth tops 13a and the tooth valleys 11a of the product are formed through the inner racks and the tooth grooves during die pressing, the top of the product is extruded through the movement of the outer racks of the inner die punch in the tooth grooves, a certain compression stroke is formed, so that enough metal powder can be arranged at the top of the product, the density requirement of the top of the product is met, the tooth tops 13a and the tooth valleys 11a of the product are gradually extruded from the outer die punch through the pushing of the inner die punch after the product is formed, and the condition that the top of the gear of the product is unfilled corner and unfilled corner caused by hard pulling of the product out of a die in the prior art is effectively prevented.

The above embodiments are only used for illustrating the present invention, and not for limiting the present invention, and those skilled in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention, so that all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims

1. The utility model provides a cross pressing powder metallurgy end face tooth's mould structure, includes ring gear portion (12) and sets up the moulding-die rack below ring gear portion (12), its characterized in that: the toothed ring part (12) and the die rack form an outer punch (1), the die rack is an inner rack (11) which is uniformly distributed, the inner rack (11) extends downwards from the bottom of the toothed ring part (12), tooth grooves (13) are formed between the inner racks (11), and the tooth grooves (13) extend to the top of the toothed ring part (12); the stamping die further comprises an inner stamping die (2), wherein the inner stamping die (2) comprises an inner ring (21) and an outer rack (22) arranged on the surface of the inner ring (21), and the outer rack (22) is matched with the tooth grooves (13); the inner punch (2) is longer than or equal to the length of the outer punch (1).

2. A die structure for cross-pressing powder metallurgy end face teeth according to claim 1, wherein: the inner rack (11) is fixedly arranged in the gear ring part (12) and extends downwards from the bottom of the gear ring part (12).

3. A die structure for cross-pressing powder metallurgy end face teeth according to claim 1, wherein: the inner racks (11) are fixedly arranged from the bottom of the gear ring portion (12), and the tooth grooves (13) formed among the inner racks (11) extend into the gear ring portion (12) and extend to the top of the gear ring portion (12).

4. A cross-pressed powder metallurgy end face tooth die structure as claimed in any one of claims 1 to 3, wherein: the inner rack (11) and the outer rack (22) are uniformly distributed in a circumferential shape.

5. A cross-pressed powder metallurgy end face tooth die structure as claimed in any one of claims 1 to 3, wherein: the width of the inner rack (11) from the tooth root to the tooth top is gradually reduced.

6. A die structure for cross-pressing powder metallurgy end face teeth according to claim 4, wherein: the inner punch (2) is longer than the outer punch (1).