Tungsten steel and commutator contact chip measuring device applying same

A technology of measuring device and contact piece, which is applied in the direction of measuring device, mechanical measuring device, and mechanical device, etc., can solve the problems of inaccurate measurement of contact piece, low measurement accuracy, and inability to measure the angle between the two sides of the contact piece, etc. Achieve the effect of reasonable raw material ratio, increase measurement accuracy, and improve interface bonding strength

Active Publication Date: 2015-05-06
HUARUI ELECTRICAL APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This kind of micrometer has high measurement accuracy and many measurement objects. It can also be used to measure the commutator, but it has the following problems when measuring the contact piece. The cross section of the contact piece is trapezoidal. The most important factor determining the accuracy of the commutator is The angle between the two sides of the contact piece. When

Method used

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  • Tungsten steel and commutator contact chip measuring device applying same
  • Tungsten steel and commutator contact chip measuring device applying same
  • Tungsten steel and commutator contact chip measuring device applying same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] First, the raw materials are weighed according to the following formula: 15% of binder metal, 0.3% of rare earth metal, 0.6% of inhibitor and the balance of tungsten carbide. Among them, the binder metal is composed of 92% metallic Co and 8% additive Ni, the inhibitor is vanadium carbide, the rare earth metal is La, and the particle size of all raw materials is less than 0.1 μm.

[0046] The raw materials are then mixed, ground, dried, pressed and sintered. The sintering is divided into three stages: preheating, pre-sintering and sintering. The preheating temperature is 400°C, the holding time is 100min, the pre-sintering temperature is 1260°C, the holding time is 110min, the sintering temperature is 1500°C, and the holding time is 100min. The heating rate of each stage was 8°C / min. In addition, in the final sintering stage, an inert gas needs to be introduced to form a sintering pressure of 6MPa. After sintering, post-treatment is carried out. The post-treatment proc...

Embodiment 2

[0048] First, the raw materials are weighed according to the following formula: 15% of binder metal, 0.3% of rare earth metal, 0.6% of inhibitor and the balance of tungsten carbide. Among them, the binder metal is composed of 92% metal Co and 8% additive Cr, the inhibitor is chromium carbide, the rare earth metal is Ce, and the particle size of all raw materials is less than 0.1 μm.

[0049] The raw materials are then mixed, ground, dried, pressed and sintered. The sintering is divided into three stages: preheating, pre-sintering and sintering. The preheating temperature is 400°C, the holding time is 100min, the pre-sintering temperature is 1260°C, the holding time is 110min, the sintering temperature is 1500°C, and the holding time is 100min. The heating rate of each stage was 8°C / min. In addition, in the final sintering stage, an inert gas needs to be introduced to form a sintering pressure of 8MPa. After sintering, post-treatment is carried out. The post-treatment process...

Embodiment 3

[0051] First, the raw materials are weighed according to the following formula: 15% of binder metal, 0.3% of rare earth metal, 0.6% of inhibitor and the balance of tungsten carbide. Among them, the bonding metal consists of 92% metallic Co and 8% additive Co 3 The composition is Al, the inhibitor is vanadium carbide, the rare earth metal is Nd, and the particle size of all raw materials is less than 0.1 μm.

[0052] The raw materials are then mixed, ground, dried, pressed and sintered. The sintering is divided into three stages: preheating, pre-sintering and sintering. The preheating temperature is 400°C, the holding time is 100min, the pre-sintering temperature is 1260°C, the holding time is 110min, the sintering temperature is 1500°C, and the holding time is 100min. The heating rate of each stage was 8°C / min. In addition, in the final sintering stage, an inert gas needs to be introduced to form a sintering pressure of 6MPa. After sintering, post-treatment is carried out. ...

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Abstract

The invention relates to tungsten steel mainly comprising the raw materials: 10-20% of a bonding metal, 0.05-0.5% of a rare earth metal, 0.3-1% of an inhibitor, and the balance tungsten carbide, wherein the crystal particle size of the tungsten steel is in a range of 0.1-1 [mu]m. With adopting of a low speed wire cutting technology, the tungsten steel is made into a measuring block applied in a commutator contact chip measuring device; the measuring device includes a ruler frame, a fixed sleeve, a movable measuring rod and a microdrum; the movable measuring rod is arranged in the fixed sleeve; the fixed sleeve is fixedly connected with the ruler frame; the movable measuring rod passes through the ruler frame; the microdrum is arranged on the fixed sleeve; the measuring block is arranged between two ends of the ruler frame and is provided with a conical notch; an included angle of two side edges of a contact chip is equal to an included angle of the conical notch; the front end of the movable measuring rod is provided with a conical measuring head corresponding to the conical notch. The tungsten steel with excellent performance of hardness, strength, wear resistance and the like is made into the measuring block applied to the commutator contact chip measuring device, and the measurement precision is high.

Description

technical field [0001] The invention relates to a tungsten steel and its application in a commutator contact piece measuring device. Background technique [0002] The contact piece is an important part of the commutator, and the commutator is surrounded by a plurality of formed contact pieces. The stability of the commutator has a lot to do with the accuracy of the contact piece. The cross-section of the contact piece is trapezoidal , To enclose all the contact pieces in a circular shape, the precision of the contact pieces is very high, therefore, the measurement of the formed contact pieces is particularly important. [0003] In the prior art, ordinary micrometers are generally used to measure the basic accuracy of the contact piece. For example, the invention patent with the authorized announcement number of CN 101419043A discloses a micrometer, which is used to measure the thickness of the smaller part of the component with uneven thickness. The micrometer includes two ...

Claims

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Application Information

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IPC IPC(8): C22C29/08C22C1/05G01B5/20G01B5/02G01B5/24
CPCC22C29/08G01B5/046G01B5/06G01B5/20G01B5/24
Inventor 王国夫孙瑞娣
Owner HUARUI ELECTRICAL APPLIANCE
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