阅读说明：本技术 一种电动工具用静端齿的制备方法 (Preparation method of static end tooth for electric tool ) 是由 樊晔 朱腾达 于化超 李伟 于 2020-12-17 设计创作，主要内容包括：本发明公开一种电动工具用静端齿的制备方法,该新型电动工具用静端齿的制备方法的使用能够提高产品局部密度的,使产品强度及硬度提高；该方法通过顶粉方式提高产品的密度；能够使得产品的局部密度提高0.25可每立方厘米,同时也大幅度提高了产品的扭矩提高,也提高了产品的合格率。(The invention discloses a preparation method of a static end tooth for an electric tool, which can improve the local density of a product and improve the strength and hardness of the product; the method improves the density of the product by a powder ejecting mode; the local density of the product can be improved by 0.25 per cubic centimeter, the torque of the product is greatly improved, and the qualified rate of the product is also improved.)

1. A preparation method of a static end tooth for an electric tool is characterized by comprising the following steps:

(1) the upper surface of the static end tooth body (1) is uniformly provided with a plurality of bosses (2); powder ejecting holes are respectively formed in the lower surface of the static end tooth body (1) corresponding to the plurality of bosses (2);

(2) the number of the bosses (2) is five, the bosses are uniformly distributed on the upper surface of the static end tooth body (1), and the number of the powder ejecting holes is five, and the five powder ejecting holes are respectively arranged on the lower surface of the static end tooth body corresponding to the bosses (2);

(3) powder ejecting holes are respectively arranged on the lower surface of the static end tooth corresponding to the boss (2) on the upper surface, and the powder ejecting holes play a role in ejecting powder when the static end tooth is pressed; during pressing, metallurgical powder at the powder ejecting hole position is pushed forward under the action of the powder ejecting hole and flows to the boss position, so that the density of a blank at the boss is obviously improved at the same filling height, and the hardness of the boss of a product is improved.

Technical Field

The invention discloses a preparation method of a static end tooth for an electric tool.

Background

A common static end tooth structure in a drilling electric tool is shown in figure 1, the static end tooth comprises a static end tooth body 1, and a plurality of bosses 2 are uniformly distributed on the upper surface of the static end tooth body 1. Usually, the bosses on the static end tooth body have certain requirements on hardness and wear resistance. When the boss is used, the boss is broken due to insufficient hardness. Therefore, in the powder metallurgy design of the static end tooth, the improvement of the density of the boss part is the key point of the design scheme.

In the powder metallurgy industry, increasing the density of parts is a main method for improving the hardness of products, and particularly the density of key parts is an important index for determining the performance of products. Currently, in the powder metallurgy industry, the engineering methods for increasing the product density are roughly divided into four types: warm-pressing forming, copper infiltration sintering, re-pressing and re-sintering and powder forging. Warm compaction is the most common of these, and in this way the density of the product can be increased by 0.25 grams per cubic centimeter. However, warm-pressing can only improve the overall density value, and has limited effect on improving the local density of the lug boss on the static end tooth body

In order to solve the problems of the prior art, the invention discloses a preparation method of a static end tooth for an electric tool, which can improve the local density of a product and improve the strength and hardness of the product; the method improves the density of the product by a powder ejecting mode; the local density of the product can be improved by 0.25 per cubic centimeter, the torque of the product is greatly improved, and the qualified rate of the product is also improved.

Disclosure of Invention

In order to overcome the defects in the background technology, the preparation method of the static end tooth for the electric tool comprises the following steps:

(1) a plurality of bosses are uniformly distributed on the upper surface of the static end tooth body; powder ejecting holes are formed in the lower surface of the static end tooth body corresponding to the plurality of bosses respectively;

(2) the number of the bosses is five, the bosses are uniformly distributed on the upper surface of the static end tooth body, and the number of the powder ejecting holes is five, and the five powder ejecting holes are respectively arranged on the lower surface of the static end tooth body corresponding to the bosses;

(3) powder ejecting holes are respectively arranged on the lower surface of the static end tooth and the positions of the bosses corresponding to the upper surface of the static end tooth, and the powder ejecting holes play a role in ejecting powder when the static end tooth is pressed; during pressing, metallurgical powder at the powder ejecting hole position is pushed forward under the action of the powder ejecting hole and flows to the boss position, so that the density of a blank at the boss is obviously improved at the same filling height, and the hardness of the boss of a product is improved.

The invention discloses a preparation method of a static end tooth for an electric tool, which can improve the local density of a product and improve the strength and hardness of the product; the method improves the density of the product by a powder ejecting mode; the local density of the product can be improved by 0.25 per cubic centimeter, the torque of the product is greatly improved, and the qualified rate of the product is also improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of a stationary end tooth for a power tool according to the present invention;

wherein, 1, a static end tooth body, 2 and a lug boss.

Detailed Description

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

In one embodiment, referring to fig. 1, a method for manufacturing a stationary end tooth for an electric tool includes the steps of:

(1) a plurality of bosses 2 are uniformly distributed on the upper surface of the static end tooth body 1; powder ejecting holes are respectively formed in the lower surface of the static end tooth body 1 corresponding to the plurality of bosses 2;

(2) the number of the bosses 2 is five, the bosses are uniformly distributed on the upper surface of the static end tooth body 1, and the number of the powder ejecting holes is five, and the powder ejecting holes are respectively arranged on the lower surface of the static end tooth body corresponding to the bosses 2;

(3) powder ejecting holes are respectively formed in the positions, corresponding to the bosses 2 on the upper surface, of the lower surface of the static end tooth, and the powder ejecting holes play a role in ejecting powder when the static end tooth is pressed; during pressing, metallurgical powder at the powder ejecting hole position is pushed forward under the action of the powder ejecting hole and flows to the boss position, so that the density of a blank at the boss is obviously improved at the same filling height, and the hardness of the boss of a product is improved.

The invention discloses a preparation method of a static end tooth for an electric tool, which can improve the local density of a product and improve the strength and hardness of the product; the method improves the density of the product by a powder ejecting mode; the local density of the product can be improved by 0.25 per cubic centimeter, the torque of the product is greatly improved, and the qualified rate of the product is also improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.