Novel efficient micro (< 5mm < 3 >) 2: 17 samarium cobalt magnet edge grinding method

Abstract

The invention discloses a novel efficient micro (< 5mm < 3 >) 2: 17 samarium cobalt magnet edge grinding method, which can be divided into a dry edge grinding method and a wet edge grinding method, namely a dry edge grinding method for putting a micro (< 5mm < 3 >) 2: 17 samarium cobalt magnet semi-finished product in any shape into a full-automatic tumbling mill and adding a friction object and a wet edge grinding method for further adding a proper amount of water and a lubricant. The micro (less than 5mm < 3 >) 2: 17 samarium cobalt magnet semi-finished product with any shape and a friction object are rolled in a full-automatic tumbling mill, edges and corners are ground to reach the slope and angle of the corners meeting the product requirements, the semi-finished product and the friction object are taken out and cleaned by an ultrasonic cleaning machine, and after the semi-finished product and the friction object enter a hot air oven to be dried, quality inspection is carried out through a full-automatic optical appearance inspection machine. The micro (less than 5mm < 3 >) 2: 17 samarium cobalt magnet in any shape is subjected to magnetizing detection. The simple and efficient production mode of the micro 2: 17 samarium cobalt magnet with any shape (less than 5mm < 3 >) is realized, the product percent of pass is improved, and the production cost is remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the field of magnet grinding technology, in particular to a novel and efficient micro (<5mm 3 )2:17 Method of edge grinding with samarium cobalt magnet. Background Art

[0002] Micro (<5mm 3 )2:17 Samarium cobalt magnets are permanent magnets used in program-controlled communication equipment, aerospace fields, and high-tech guidance products. They have extremely high requirements for physical properties such as magnetic flux, remanence, coercive force, thermal conductivity, operating temperature, thermal expansion coefficient, and compressive strength. Therefore, in addition to micro (<5mm 3 )2:17 The composition ratio of samarium cobalt magnets is very strict, and there are strict requirements on the surface finish and the roundness of the corners. 3 ) The method for making 2:17 SmCo magnets is to make a mold according to the shape of the target product, use the mold to cast and shape, and then grind and polish the edges and corners of the demolded SmCo magnets one by one; or use a large piece of 2:17 SmCo magnet block material for cutting and shaping, and then grind and polish the edges and corners one by one. The traditional production method is time-consuming and labor-intensive. Not only is the production speed slow, the energy consumption is huge, the consistency between individual products is relatively poor, the qualified rate of finished products is low, and the production cost remains high. Especially for micro (<5mm 3 ) The physical properties of 2:17 samarium cobalt magnets are more fragile than 1:5 samarium cobalt magnets and Ru-Fe-B magnets, and debris is easily generated during processing and transportation, affecting the quality of the product. Therefore, the present invention discloses a miniature (<5mm) relay with any shape. 3 )2:17 Edge grinding method of samarium cobalt magnet. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the above and / or existing micro (<5mm 3 )2:17 The problems existing in the edge grinding method of samarium cobalt magnets have led to the present invention. Therefore, the purpose of the present invention is to provide a new and efficient micro (<5mm 3 )2∶17 SmCo magnet edge grinding method, to achieve micro (<5mm 3)A simple and efficient production method for 2∶17 samarium cobalt magnets changes the inefficient and energy-consuming status of traditional single-product grinding, improves the product qualification rate, overcomes the difficulties of being fragile, easy to break, and easy to lose edges, and significantly reduces the production cost.

[0005] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0006] A new and efficient method for edging micro (<5mm 3 ) 2∶17 samarium cobalt magnets can be divided into a dry edging method and a wet edging method, that is, a dry edging method of putting semi-finished products of micro (<5mm 3 ) 2∶17 samarium cobalt magnets of any shape into a full-automatic rolling mill and adding friction materials, or a wet edging method of further adding an appropriate amount of tap water and a lubricant meeting environmental protection requirements (such as meeting the requirements of the EU REACH standard SVHC test). The semi-finished products of micro (<5mm 3 ) 2∶17 samarium cobalt magnets of any shape and the friction materials are tumbled in a full-automatic rolling mill to grind off the edge corners until the slope and angle of the corners meet the product requirements, taken out and cleaned with an ultrasonic cleaning machine, dried in a hot air oven, and then inspected by a full-automatic optical appearance inspection machine. The qualified micro (<5mm 3 ) 2∶17 samarium cobalt magnets of any shape are subjected to magnetization detection and become qualified micro (<5mm 3 ) 2∶17 samarium cobalt magnet finished products.

[0007] As a preferred scheme of a new and efficient method for edging micro (<5mm 3 ) 2∶17 samarium cobalt magnets according to the present invention, the friction materials in the full-automatic rolling mill are special abrasives sintered from materials such as brown fused alumina sand and silica powder in a certain proportion, and the particle size is between 1mm and 10mm.

[0008] As a preferred scheme of a new and efficient method for edging micro (<5mm 3 ) 2∶17 samarium cobalt magnets according to the present invention, when using the sintered special abrasives as friction materials, some hard sand particles such as quartz sand and emery with any shape and particle size between 80 mesh and 360 mesh can be added.

[0009] As a preferred scheme of a new and efficient method for edging micro (<5mm 3 ) 2∶17 samarium cobalt magnets according to the present invention, the ratio of semi-finished products of micro (<5mm 3 ) 2∶17 samarium cobalt magnets of any shape to the friction materials is 2 to 10∶1.

[0010] As a novel and efficient micro (<5mm 3 )2:17 A preferred embodiment of the method for wet grinding of samarium cobalt magnets, wherein micro-sized (<5 mm) of any shape 3 )2:17 The rolling friction time of the samarium cobalt magnet semi-finished product and the friction object in the fully automatic rolling mill is 2 to 50 minutes.

[0011] As a novel and efficient micro (<5mm 3 )2:17 A preferred embodiment of the method for wet grinding of samarium cobalt magnet, wherein the micro-edges (<5mm) of any shape after grinding 3 )2:17 The semi-finished samarium cobalt magnet is cleaned in an ultrasonic cleaning machine for 3 to 20 minutes.

[0012] Compared with the prior art, the present invention has the beneficial effects of realizing the miniature (<5mm 3 )2:17 The simple and efficient production method of samarium cobalt magnets changes the inefficient and energy-consuming status of traditional single product grinding, improves the product qualification rate, overcomes the difficulty of fragility, and significantly reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a dry edge grinding method in which a micro (<5mm3) 2:17 SmCo magnet semi-finished product is placed in a fully automatic roller grinder and special abrasives, quartz sand and corundum are added.

[0014] Figure 2 It is a schematic diagram of the wet edge grinding method by further adding tap water and lubricant to the dry edge grinding method.

[0015] Figure 3 It is a schematic diagram of the processing flow of placing a miniature (<5mm3) 2:17 samarium-cobalt magnet into an ultrasonic cleaning machine, a hot air oven, a fully automatic optical appearance inspection machine, and a magnetizing machine.

[0016] Figure 4 It is a plan view of a micro (<5mm3) 2:17 samarium-cobalt magnet without edge grinding and a micro (<5mm3) 2:17 samarium-cobalt magnet with edge grinding.

[0017] In the figure: (1) un-grinded micro-sized (<5m3) 2:17 samarium-cobalt magnet, (2) ground micro-sized (<5m3) 2:17 samarium-cobalt magnet, (3) special abrasive, (4) quartz sand, corundum, (5) fully automatic roller grinding machine, (6) tap water and lubricant, (7) ultrasonic cleaning machine, (8) hot air oven, (9) fully automatic optical appearance inspection machine, (10) magnetizing machine. DETAILED DESCRIPTION

[0018] The present invention provides a novel and efficient method for grinding the edge of a micro (<5 mm3) 2:17 samarium cobalt magnet, which realizes a simple and efficient production method for micro (<5 mm3) 2:17 samarium cobalt magnet, changes the inefficient and energy-consuming status of traditional single product grinding, improves the product qualification rate, overcomes the difficulties of being fragile, easy to break, and easy to lose edge, and significantly reduces the production cost. In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below.

[0019] exist Figure 1 The preferred embodiment is a dry edge grinding method: a micro (<5 mm3) 2:17 samarium cobalt magnet (1) without edge grinding is placed in a fully automatic rolling mill (5), and a friction material is added. The friction material is composed of a special abrasive (3) and quartz sand and corundum (4). The particle size of the special abrasive (3) is between 1 mm and 10 mm, and the particle size of the quartz sand and corundum (4) is between 80 mesh and 360 mesh. The ratio of the special abrasive (3) to the quartz sand and corundum (4) is 9:1; the ratio of the micro (<5 mm3) 2:17 samarium cobalt magnet (1) without edge grinding to the friction material is 2 to 10:1, and the total volume of the added micro (<5 mm3) 2:17 samarium cobalt magnet (1) and the friction material occupies about 50% to 90% of the total volume of the fully automatic rolling mill (5). The lid of the fully automatic roller grinding machine (5) is closed, and the automatic roller grinding time is set to 2 to 50 minutes according to the requirements of the grinding angle. The working button is activated to perform roller grinding. After stopping the machine, the edge-grinded micro (<5 mm3) 2:17 samarium cobalt magnet (2) and the friction object are taken out, and the edge-grinded micro (<5 mm3) 2:17 samarium cobalt magnet (2) is sieved and washed with water.

[0020] Figure 2 The wet grinding method is based on the dry grinding method. After adding the materials and before starting the working button, a proper amount of tap water and lubricant (6) are injected into the fully automatic roller mill (5), wherein the lubricant should meet the national environmental protection requirements or the SVHC test requirements of the EU REACH standard. The fully automatic roller mill (5) cover is closed, and the automatic rolling grinding time is set to 2 to 50 minutes according to the requirements of the grinding angle. The working button is started for rolling grinding. After stopping the machine, the micro (<5mm3) 2:17 samarium cobalt magnet (2) and the friction object after grinding are taken out, and the micro (<5mm3) 2:17 samarium cobalt magnet (2) after grinding is screened and washed with water.

[0021] Figure 3It can be seen that the washed micro (<5mm3) 2:17 samarium cobalt magnet (2) is placed in an ultrasonic cleaning machine (7), injected with tap water for cleaning for 3 to 20 minutes, fished out and drained, dried in a hot air oven (8), and inspected by a fully automatic optical appearance inspection machine (9), and defective products are eliminated. The qualified micro (<5mm3) 2:17 samarium cobalt magnet (2) is magnetized by a magnetizer (10), and the magnetic state is inspected. The qualified products become qualified products of micro (<5mm3) 2:17 samarium cobalt magnet (2).

[0022] Figure 4 It can be seen that the un-edge-grinded micro-sized (<5 mm3) 2:17 samarium-cobalt magnet (1) becomes the edge-grinded micro-sized (<5 mm3) 2:17 samarium-cobalt magnet (2) after being ground by the dry grinding method or the wet grinding method. By comparison, it can be seen that the acute angle becomes an obtuse angle of a certain angle.

[0023] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A new type of efficient micro (<5mm 3 )2:17 Samarium Cobalt Magnet Edge Grinding Method, characterized in that, Any shape of micro (<5m 3 )2:17 SmCo magnet semi-finished products are put into the automatic roller grinding machine to add friction materials for dry grinding, and further add appropriate amount of water and lubricant for wet grinding. Micro (<5mm) of any shape 3 )2:17 SmCo magnet semi-finished products and friction objects are tumbled in the fully automatic rolling mill to grind the edges and corners to the slope and angle of the corners that meet the product requirements. After being taken out, they are cleaned with an ultrasonic cleaner and dried in a hot air oven. They are then inspected by a fully automatic optical appearance inspection machine to remove any shape of micro (<5mm 3 )2:17 SmCo magnets are magnetized and tested to become qualified micro-sized (<5mm) of any shape 3 )2:17 SmCo magnet finished product.

2. A novel and efficient micro-scale (<5m 3 )2:17 Samarium Cobalt Magnet Edge Grinding Method, characterized in that, The friction material in the fully automatic roller grinding machine is a special abrasive made by sintering brown corundum sand, silicon micropowder and other materials in a certain proportion, and the particle size is between 1mm and 10mm.

3. A novel and efficient micro-sized (<5 mm) 3 )2:17 Samarium Cobalt Magnet Edge Grinding Method, characterized in that, When using special abrasives as friction materials, you can add some hard sand particles such as quartz sand, corundum, etc. with any shape and particle size between 80 mesh and 360 mesh.

4. A novel and efficient micro-sized (<5 mm) 3 )2:17 Samarium Cobalt Magnet Edge Grinding Method, characterized in that, Any shape of micro (<5mm 3 )2:17 The ratio of the semi-finished samarium cobalt magnet to the friction material is 2 to 10:

1.

5. A novel and efficient micro-sized (<5 mm) 3 )2:17 Samarium Cobalt Magnet Edge Grinding Method, characterized in that, Any shape of micro (<5mm 3 )2:17 The rolling friction time of the semi-finished samarium cobalt magnet and the friction object in the fully automatic rolling mill is 2 to 50 minutes.

6. A novel and efficient micro-sized (<5 mm) 3 )2:17 Samarium Cobalt magnet edge grinding method, characterized in that: Any shape of micro (<5mm) after polishing 3 )2:17 The semi-finished samarium cobalt magnet is cleaned in an ultrasonic cleaning machine for 3 to 20 minutes.

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