Abrasive preparation method for reducing rivet electrical contact surface roughness and applications thereof

Abstract

The application discloses a kind of abrasive preparation method and its application for reducing rivet electric contact surface roughness, steps are as follows: mixed powder is mixed with epoxy resin according to proportion, then pour into stirrer and stir uniformly, mixed powder includes the following components, by mass fraction: ferroferric oxide 50-150 parts;Alumina 40-100 parts;Diamond 20-60 parts;Zirconium oxide 5-20 parts;The colloidal after stirring is poured into mould, and abrasive demolding is carried out after 12 hours and poured out.This abrasive can reduce the rivet electric contact surface roughness, so that the rivet electric contact surface shape after grinding is fine sawtooth rivet electric contact contact more closely, and then improve the contact resistance stability, provide technical support for low-voltage electrical industry.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of rivet electrical contact surface treatment, and particularly relates to a grinding material preparation method for reducing the surface roughness of a rivet electrical contact and application thereof. BACKGROUND

[0002] The material of a rivet electrical contact is an important factor influencing the working reliability of a switch electrical contact system. The present inventors have found through in-depth analysis and research that the contact surface of a rivet electrical contact is very rough after conventional grinding treatment after being manufactured, which causes unstable contact resistance, and the unstable contact resistance directly leads to large temperature rise fluctuation of the product. Therefore, how to reduce the contact resistance of the contact surface and make the contact have stable contact resistance is the focus of attention and research of various contact manufacturers. However, there is no reliable and stable scheme for reference in the existing grinding material preparation method and application means, and therefore it is necessary to develop a grinding material for reducing the surface roughness of a rivet electrical contact for corresponding improvement. SUMMARY

[0003] The present application aims to overcome the shortcomings and deficiencies in the prior art, and provides a grinding material preparation method for reducing the surface roughness of a rivet electrical contact and application thereof.

[0004] To achieve the above-mentioned purpose, the first aspect of the present application provides a grinding material preparation method for reducing the surface roughness of a rivet electrical contact, and the technical scheme is that the grinding material comprises mixed powder and epoxy resin with a mass fraction ratio of 1-20, the mesh number of the mixed powder is 800-1000 meshes, and the mixed powder comprises the following components in mass fraction:

[0005]

[0006]

[0007] The mixed powder and the epoxy resin are mixed in proportion, then poured into a stirrer for uniform stirring, the stirred glue is poured into a mold, the cavity of the mold is a triangular pyramid, and the grinding material is demolded and poured out after forming.

[0008] The second aspect of the present application provides a rivet electrical contact surface treatment method, and the method is characterized in that: a rivet electrical contact, a grinding material, an abrasive and water are added into a grinding barrel of a grinding machine, the grinding material is prepared based on the preparation method in claim 1, the rotation speed is set to 120 r / min, the rivet electrical contact is separated by pouring out and rinsing after 90 min, and the following steps are performed thereafter:

[0009] (1) The rivet electrical contact is placed into an ultrasonic device for ultrasonic cleaning treatment;

[0010] (2) Dry the rivet electrical contacts, put them into the annealing boat, and push them into the nitrogen annealing furnace for annealing. Set the temperature to 350℃±10℃ and remove them to cool after 4 hours.

[0011] (3) Use the prepared acid solution to pickle the rivet electrical contacts to remove oxides and other foreign matter from the surface of the rivet electrical contacts, and then clean them again.

[0012] (4) Polish the rivet electrical contacts with a polishing machine, and then rinse them clean;

[0013] (5) The cleaned rivet electrical contacts are dried and cooled to become finished products.

[0014] The beneficial effects of this invention are: the method reduces the surface roughness of the rivet electrical contact, and compared with traditional abrasives, it has a very outstanding surface treatment effect, which can greatly improve the smoothness of the rivet electrical contact surface, thereby reducing the adhesion of copper powder and foreign matter, making the surface morphology of the rivet electrical contact after grinding uneven, and thus making it fit better when in contact, thereby improving the contact resistance of the rivet electrical contact. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of the present invention.

[0016] Figure 1 In this diagram, a is a schematic diagram of the abrasive described in this invention, and b is a schematic diagram of the mold used.

[0017] Figure 2 A and B in the diagram are schematic diagrams of the contact process between the new abrasive of the present invention and the existing abrasive after grinding;

[0018] Figure 3 Ab and Ac are schematic diagrams showing the appearance of the rivet electrical contacts after grinding with the new abrasive of the present invention and existing abrasives. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Example 1:

[0021] The optimal ratio used in this embodiment is (m / m):

[0022] The abrasive comprises a mixture of powder and epoxy resin in a mass fraction ratio of 1-20. The mixed powder...

[0023] The number is 800-1000 mesh, including the following components, in mass parts:

[0024]

[0025] The mixed powder and epoxy resin are mixed in a proportion, stirred in a blender, and then poured into a mold 1. The mold cavity is a triangular pyramid. After molding, the abrasive 11 is demolded and poured out.

[0026] During surface treatment, the abrasive, grinding agent, and water are added to a grinding barrel. Three scoops of abrasive, 80 ml of grinding agent, and water are added to the scale line. Load into the grinding machine, set the speed to 120 r / min, and after 90 min, pour out the rinsing and separation products. Then follow the steps below:

[0027] (1) Put the product into an ultrasonic device for ultrasonic cleaning treatment;

[0028] (2) Dry the product and load it into an annealing boat and push it into a nitrogen annealing furnace for annealing. The temperature is set to 350℃±

[0029] 10℃, and after 4 hours, take it out and cool it down;

[0030] (3) Use the prepared acid solution to perform pickling treatment on the product, remove the surface oxides and other foreign matter, and then clean it again;

[0031] (4) Use a polishing machine to polish the product, and then rinse it clean;

[0032] (5) The cleaned product is dried and cooled to the finished product.

[0033] Example Two:

[0034] The lowest ratio of this example is (m / m):

[0035] The abrasive includes a mixture of powder and epoxy resin with a mass fraction of 1-20. The number of the mixed powder is 800-1000 mesh, including the following components, in mass parts:

[0036]

[0037]

[0038] During surface treatment, the abrasive, grinding agent, and water are added to a grinding barrel. Three scoops of abrasive, 80 ml of grinding agent, and water are added to the scale line. Load into the grinding machine, set the speed to 120 r / min, and after 90 min, pour out the rinsing and separation products. Then follow the steps below:

[0039] (1) Put the product into an ultrasonic device for ultrasonic cleaning treatment; ​

[0040] (2) The product is dried and put into an annealing boat and pushed into a nitrogen annealing furnace for annealing, with the temperature set at 350°C ± 10°C, and taken out after 4 hours for cooling;

[0041]

[0042] (3) The product is pickled with prepared acid solution to remove surface oxides and other foreign matter, and then cleaned again;

[0043] (4) The product is polished with a polishing machine and then cleaned;

[0044] (5) The cleaned product is dried and cooled to a finished product.

[0045] Example Three

[0046] The highest ratio of the present example is (m / m):

[0047] The abrasive includes mixed powder and epoxy resin with a mass fraction of 1-20. The mixed powder has a mesh size of 800-1000 mesh and includes the following components in mass fraction:

[0048]

[0049]

[0050] When preparing, the abrasive, grinding agent and water are added into a grinding barrel. Three scoops of abrasive, 80 ml of grinding agent and water added to the scale line position. The grinding machine is set to 120 r / min, and after 90 min, the product is poured out and washed to separate, and then the following steps are performed:

[0051] (1) The product is cleaned with ultrasonic cleaning equipment;

[0052] (2) The product is dried and put into an annealing boat and pushed into a nitrogen annealing furnace for annealing, with the temperature set at 350°C ± 10°C, and taken out after 4 hours for cooling;

[0053]

[0054] (3) The product is pickled with prepared acid solution to remove surface oxides and other foreign matter, and then cleaned again;

[0055] (4) The product is polished with a polishing machine and then cleaned;

[0056] (5) The cleaned product is dried and cooled to a finished product.

[0057] Test data are as follows:

[0058] 1、 Figure 1 ​​​A is the schematic diagram of the abrasive material of the present application, and B is the schematic diagram of the mold used;

[0059] 2、 Figure 2 A and B are the schematic diagrams of the rivet electrical contact contact process after the new abrasive material and the existing abrasive material are ground; the conventional abrasive material components are composed of epoxy resin and mixed powder (mainly including: aluminum oxide, ferrous oxide, magnesium oxide, yttrium oxide).

[0060] 3、 Figure 3 Ab and Ac are the schematic diagrams of the appearance of the rivet electrical contact after the new abrasive material and the existing abrasive material are ground; 4, product roughness effect:

[0061]

[0062]

[0063] 5, product contact resistance effect:

[0064]

[0065] Although the present application has been described with reference to several specific embodiments, it is understood that the present application is not limited to the specific embodiments disclosed. The present application is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A method for surface treatment of rivet electrical contacts, characterized in that: Add the rivet electrical contact, abrasive, polishing compound, and water into the polishing barrel of the polishing machine. The abrasive is prepared based on an abrasive preparation method for reducing the surface roughness of the rivet electrical contact. Set the rotation speed to 120 r / min, and after 90 minutes, pour out the abrasive, rinse, and separate the rivet electrical contact. Then proceed with the following steps: (1) Place the rivet electrical contacts into an ultrasonic device for ultrasonic cleaning. (2) Dry the rivet electrical contacts, put them into the annealing boat, and push them into the nitrogen annealing furnace for annealing. Set the temperature to 350℃±10℃ and remove them to cool after 4 hours. (3) Use the prepared acid solution to pickle the rivet electrical contacts to remove oxides and other foreign matter from the surface of the rivet electrical contacts, and then clean them again. (4) Polish the rivet electrical contacts with a polishing machine, and then rinse them clean; (5) The cleaned rivet electrical contacts are dried and cooled to the finished product; The method for preparing the abrasive for reducing the surface roughness of rivet electrical contacts includes: the abrasive comprising a mixed powder and epoxy resin in a mass fraction ratio of 1-20, wherein the mixed powder has a mesh size of 800-1000 mesh, and the mixed powder comprises the following components, in parts by mass: 50-150 parts of ferric oxide 40 to 100 parts of aluminum oxide 20 to 60 parts diamond Zirconia 5 to 20 parts; The mixed powder and epoxy resin are mixed in a certain proportion and then poured into a mixer and stirred evenly. The stirred colloid is poured into a mold with a triangular pyramidal cavity. After molding, the abrasive is demolded and poured out.

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