Grounding device composite metal friction disc and production process thereof

A composite metal and grounding device technology, applied in the direction of connection, vehicle connectors, connection contact materials, etc., can solve the problems of poor dimensional stability, heavy friction disc weight, and easy cracks, etc., and achieve good wear resistance and electrical conductivity , good casting performance, and the effect of improving reliability

Pending Publication Date: 2020-04-14
HENAN HESHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the friction disc of the grounding device mainly has two structural forms: a single metal friction disc and a non-metallic material coated metal friction disc core; the single metal friction disc is mainly copper alloy and stainless steel friction disc, the friction disc is heavy, and the grounding device is in Under the vibration condition of the EMU, it is easy to cause the mounting bolts to loosen or even break, which affects the operation safety of the EMU
The non-metallic material covers the metal friction disc core structure, and the friction disc is light in weight. However, when the non-metallic material vibrates in the EMU, cracks are prone to appear on the surface of the non-metallic material and at the joint between the non-metal and the metal. The non-metallic material is coated The dimensional stability of the material is poor, and it may interfere with the assembly parts after loading and running for a period of time; the melting point of non-metallic materials is low, and when the grounding device is impacted by a large current, non-metallic materials may melt; compared with metal materials, non-metallic materials Metal materials have poor thermal conductivity, and the temperature rise of the grounding device is high after long-term use

Method used

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  • Grounding device composite metal friction disc and production process thereof
  • Grounding device composite metal friction disc and production process thereof
  • Grounding device composite metal friction disc and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The production process of producing the above-mentioned a kind of grounding device composite metal friction disc, such as Figure 4 with 5 As shown, the specific steps are as follows:

[0042]In step 1, the copper liquid 10 and the aluminum liquid 12 are subjected to compound continuous casting through a double crystallizer continuous casting method to form a composite billet 14; the specific method is to use two coaxial crystallizers arranged along the direction of drawing the billet, first The prepared copper liquid 10 is solidified in the upper crystallizer to form a disk core blank 11, and the disk core blank 11 enters the aluminum liquid 12 in the lower heat preservation crucible, and then the aluminum liquid is solidified in the lower mold to form a wrapped layer embryo material 13, and then the cladding layer blank material 13 is metallurgically combined with the disk core blank material 11 to form a composite blank material 14, such as Figure 5 shown.

[004...

Embodiment 2

[0054] The production process of producing the described a kind of grounding device composite metal friction disc, such as Figure 4 with 5 As shown, the specific steps are as follows:

[0055] Step 1, metallurgically combining the copper liquid 10 and the aluminum liquid 12 through the double crystallizer continuous casting method to form a composite blank 14; The prepared copper liquid 10 is solidified in the upper crystallizer to form a disk core blank 11, and the disk core blank 11 enters the aluminum liquid 12 in the lower heat preservation crucible, and then the aluminum liquid solidifies in the lower mold to form a coating layer blank 13, then the cladding layer blank 13 is metallurgically combined with the disk core blank 11 to form a composite blank 14, such as Figure 5 shown.

[0056] Wherein, the chemical composition of the copper liquid 10 is Sn 8%, Zn 2%, Pb 1.5%, Ni 0.1%, P 0.04%, Ti 0.3% by mass fraction, the total impurity content is less than 0.2%, and the...

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Abstract

The invention belongs to the field of machine manufacturing and relates to a grounding device composite metal friction disc and a production process thereof. A double-crystallizer continuous casting method is used for producing a composite blank, then the composite blank is subjected to heat treatment, then machining is performed, and the grounding device composite metal friction disc is obtained.The grounding device composite metal friction disc is composed of a friction disc core and a coating layer, the friction disc core is made of abrasion-resistant copper alloy, and the coating layer ismade of light metal aluminum alloy in the prior art. Compared with a single metal friction disc, the composite metal friction disc can effectively reduce weight of the friction disc, and can improvereliability of a grounding device in an application process; and compared with a non-metal material coated metal friction disc core structure, the composite metal friction disc is high in bonding strength, good in heat dissipation performance and good in size stability, and can improve safety of the grounding device in an operation process.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and relates to a composite metal friction disc of a grounding device and a production process thereof. Background technique [0002] The grounding device is a device that realizes the grounding return function of the EMU. The core components of the grounding device are friction pairs, namely carbon brushes and friction discs. [0003] At present, the friction disc of the grounding device mainly has two structural forms: a single metal friction disc and a non-metallic material coated metal friction disc core; the single metal friction disc is mainly copper alloy and stainless steel friction disc, the friction disc is heavy, and the grounding device is in Under the vibration condition of the EMU, it is easy to cause the mounting bolts to loosen or even break, which affects the operation safety of the EMU. The non-metallic material covers the metal friction disc core structure, and the frict...

Claims

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Application Information

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IPC IPC(8): H01R39/02H01R39/08H01R39/14H01R4/64H01R43/10
CPCH01R4/64H01R39/025H01R39/08H01R39/14H01R43/10H01R2201/26
Inventor 张雪梅王伟番马冬冬赵东源马小峰张卫国白建枝李强
Owner HENAN HESHI TECH CO LTD
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