Preparation process of copper-based powder contact and relay formed by prepared contact

A copper-based powder, preparation process technology, applied in the direction of relays, electromagnetic relays, electromagnetic relay details, etc., can solve problems such as billet cracks, no cooling steps, etc.

Active Publication Date: 2021-05-18
CIVIL AVIATION FLIGHT UNIV OF CHINA
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that there is no professional cooling step in the preparation process of the existing copper-based powder contact, so

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation process of copper-based powder contact and relay formed by prepared contact
  • Preparation process of copper-based powder contact and relay formed by prepared contact
  • Preparation process of copper-based powder contact and relay formed by prepared contact

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033]Example 1

[0034]Such asfigure 1 As shown, the prepared process of the copper-based powder contact includes the following steps: S1. Mixed powder: raw copper, raw material, raw material trioxide, raw material carbide, raw boron tungsten, raw material ruthenium, raw material Lanthan and raw graphite were finely grinded with a high energy ball mill. After the ball mill, the mixed powder I; filtration and drying: filtered the mixed powder I using a filtration device to obtain a filtered mixed powder II, and mixed powder II Drying under vacuum conditions; S3. One pressing: The mixed powder II is pressed into a blank ingot on a hydraulic machine having a pressure of 320 MPa. After the pressing pressure reaches 320 MPa, press 2 min; s4. Sintering: put the blank ingot into the protection Sintering at 800 ° C; S5. Cooling: A rare gas filled with 35 min (25 ° C) in the furnace in the furnace, then change the temperature of the rare gas filled into the furnace, so that the temperature is ...

Example Embodiment

[0040]Example 2

[0041]The difference between the present embodiment and the first embodiment is that the component is different in the component ingredients in the step S1 of the present embodiment, and the present embodiment is ingredients according to the following weight components: 1.8 parts of the raw material, three raw materials 1.3 parts of aluminum oxide, 2 raw material bonosa, 0.9 raw boronification, 0.1 parts of raw material, 0.07 raw materials, 3 raw graphite, 88 raw materials. In the first embodiment, the sintering temperature in step S4 is 900 ° C, and the initial pass in step S5 is inserted into a normal temperature duration of 40 min, and the secondary sintering temperature in step S7 is 500 ° C. The billet cracked rate comparison detection was performed using Example 1. The chip cracked rate of the billet of the present embodiment is less than 4.2%, which means that the present embodiment can significantly reduce the probability of crack after the billet is subjected...

Example Embodiment

[0042]Example 3

[0043]The difference between the present embodiment and the first embodiment is that the components are different when the weight component is performed in step S1 of the present embodiment, and the present embodiment is ingredients according to the following weight components: 3 parts of the raw material, three materials 0.5 different aluminum oxide, 0.5 raw material bonosa, 1.5 raw boron dihydrates, 0.05 raw materials, 0.1 parts of raw material, 2 raw graphite, 96 raw materials. The primary sintering temperature in the step S4 of this embodiment is 1000 ° C, and in the first time passing into the normal temperature duration of 30 min, the secondary sintering temperature is 550 ° C in step S7. The billet cracked rate comparison detection was carried out by the same manner as in Example 1. The granular cracked rate of the billet of the present embodiment is less than 4.4%, which will clearly, the present embodiment can significantly reduce the probability of crack aft...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparation process of a copper-based powder contact. The preparation process comprises the following steps: S1, performing primary powder mixing; S2, performing filtering and drying; S3, performing primary pressing; S4, performing primary sintering; S5, performing cooling: after the primary sintering is finished, introducing room-temperature rare gas into a furnace for 30-40 minutes, then changing the temperature of the rare gas filled into the furnace, gradually reducing the temperature of the rare gas to 20 DEG C from 100 DEG C in an equal difference manner at a difference value of 10 DEG C, maintaining the filling time of the rare gas at each temperature gradient for 5 minutes, then taking out a blank ingot after the primary sintering, and cooling the blank ingot through a cooling device; S6, performing secondary pressing; S7, carrying out secondary sintering; and S8, performing rolling, wiredrawing and blanking. The invention also discloses a relay formed by the contact prepared by the preparation process. According to the method, the professional cooling step is added in the traditional metal powder metallurgy process, so that the blank ingot subjected to primary sintering can be completely cooled after the cooling step, and the blank ingot is prevented from generating cracks during secondary pressing to influence the property of the contact.

Description

technical field [0001] The invention relates to the technical field of contact preparation, in particular to a preparation process of a copper-based powder contact and a relay composed of the prepared contact. Background technique [0002] The relay is an automatic electrical appliance that switches on or off the control circuit to realize automatic control and protection of power devices according to changes in certain input signals. There are many types of relays, which can be divided into: voltage relays, current relays, time relays, temperature relays, speed relays, pressure relays, etc. according to the nature of the input signal; according to the working principle can be divided into: electromagnetic relays, induction relays, electric relays Relays, electronic relays, etc. Among them, the electromagnetic relay is generally composed of a coil, an iron core, and one or several sets of reeds with contacts. The contacts are divided into moving contacts and static contacts...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01H11/04H01H50/54H01H1/50H01H1/04B22F5/00B22F3/16B22F3/10B22F1/00
CPCH01H11/048H01H50/54H01H1/50H01H1/04B22F5/00B22F3/16B22F3/1007B22F1/14
Inventor 周跃飞林琳
Owner CIVIL AVIATION FLIGHT UNIV OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap