A method for repairing the stator of a CNC internal and external grinding machine

Abstract

This invention discloses a method for repairing the stator of a CNC internal and external grinding machine, comprising the following steps: a) cleaning the fallen magnet (1) with industrial alcohol to obtain product A; b) attaching insulating sheets (3) to both sides of the bonding surface of product A to the substrate (2) to obtain product B; c) cleaning the mounting position of the fallen magnet (1) on the substrate (2) with industrial alcohol, applying glue to the bottom surface of the mounting position, attaching product B to the bottom surface of the mounting position, and placing an insulating plate (4) for positioning and spacing on the wide side of product B to obtain product C; d) sealing product C with glue, keeping the glue filling height flush with the outer surface of the magnet (1), and completing the repair after the glue cures; in step b), the insulating sheet (3) is 0.05-0.2 mm thick. This invention has the advantages of low-cost stator repair and long service life of the repaired stator.

Description

Technical Field

[0001] This invention belongs to the field of linear motor stator repair, and particularly relates to a method for repairing the stator of an S131 type CNC internal and external grinding machine motor. Background Technology

[0002] The S131 CNC internal and external grinding machine is an imported high-precision machine that uses linear motor drive technology. Its Z-axis maximum travel is 400mm, speed ranges from 0.001 to 20000 mm / min, and resolution is 0.00001mm. The secondary part of the linear motor includes a coil mover that drives the worktable. The coil mover is supported by a hydrostatic guide rail, and a stator is located on one side of the coil mover. The stator generates a strong static magnetic field (up to 1.2 Tesla). Figures 4 to 6 As shown, the stator consists of multiple 50mm×17.4mm×7.37mm magnets bonded to two types of substrates: 76mm×180mm×12mm and 152mm×180mm×12mm, totaling six substrates. On each substrate, there is a 1.6mm magnetic circuit gap between adjacent magnets in the width direction, with no support in between. When the coil rotor moves, a strong reaction force is applied to the magnets, making them prone to detachment. When one magnet detaches from the substrate, due to the strong magnetic attraction, it will attract adjacent magnets, altering the motor's magnetic circuit, causing a stator malfunction, affecting motor performance, and triggering an alarm and seizure. Currently, there is no domestic method for stator repair. When the motor alarms and seizes, the only option is to repair the stator through foreign manufacturers by replacing the magnets. However, the specific steps for this replacement are kept confidential. Replacing a stator magnet on a single shaft costs 80,000 yuan, which is very expensive. Therefore, a repair method is urgently needed to reduce the cost of stator repair. Summary of the Invention

[0003] The purpose of this invention is to provide a method for repairing the stator of a CNC internal and external grinding machine. This invention has the advantages of low-cost stator repair and a long service life for the repaired stator.

[0004] The technical solution of this invention: A method for repairing the stator of a CNC internal and external grinding machine, comprising the following steps:

[0005] a) Clean the fallen magnet with industrial alcohol to obtain product A.

[0006] b. Adhere insulating sheets to both sides of the bonding surface of product A to the substrate to obtain product B.

[0007] c. Clean the mounting positions of the fallen magnets on the substrate with industrial alcohol. Apply glue to the bottom surface of the mounting positions and attach product B to the bottom surface of the mounting positions. Place a positioning spacer plate on the wide side of product B to obtain product C.

[0008] d. Seal C with glue, keeping the glue level with the outer surface of the magnet. The repair is complete after the glue has cured.

[0009] In the aforementioned method for repairing the stator of a CNC internal and external grinding machine, in step b, the isolation sheet is 0.1 mm thick.

[0010] In the aforementioned method for repairing the stator of a CNC internal and external grinding machine, the isolation sheet is a piece of white paper that is 17mm long, 2mm wide, and 0.1mm thick.

[0011] In the aforementioned method for repairing the stator of a CNC internal and external grinding machine, in step c, the thickness of the isolation plate is 1.6 mm.

[0012] In the aforementioned method for repairing the stator of a CNC internal and external grinding machine, the isolation plate is a plastic sheet with a length of 5mm, a width of 5mm, and a thickness of 1.6mm.

[0013] In the aforementioned method for repairing the stator of a CNC internal and external grinding machine, the adhesive used in steps c and d is epoxy resin adhesive.

[0014] In the aforementioned method for repairing the stator of a CNC internal and external grinding machine, the model of the CNC internal and external grinding machine is S131.

[0015] Compared to existing technologies, this invention, developed through practical experience, creates an appropriate gap between the magnet and the substrate by setting an insulating sheet on the magnet. This allows sufficient adhesive to penetrate between the magnet and the substrate. Epoxy resin is preferred, increasing the bonding strength between the magnet and the substrate and enabling the magnet to be reattached to the substrate, thus allowing for low-cost stator repair. By setting an insulating sheet on the wide side of the magnet, the distance between the magnets is made uniform, maintaining the original magnetic circuit gap. After adhesive injection, multiple magnets are connected into a single structure, supporting each other under the reaction force of the coil mover, preventing them from easily detaching from the substrate and extending the stator's service life. Furthermore, the applicant discovered that the harsh working environment of grinding machines allows water and oil stains to accumulate in the gaps between magnets, corroding the adhesive and causing magnets to easily detach from the substrate. This invention eliminates these gaps through adhesive injection and prevents water and oil stains from entering between the magnets, avoiding corrosion of the adhesive between the magnet and the substrate, further improving the stator's service life. Therefore, the present invention has the advantages of being able to repair stators at low cost and having a long service life after repair. Attached Figure Description

[0016] Figure 1 This is a front view of the repaired magnet on the substrate according to the present invention.

[0017] Figure 2 This is a left view of the repaired magnet on the substrate according to the present invention.

[0018] Figure 3 This is a top view of the repaired magnet on the substrate according to the present invention.

[0019] Figure 4 This is a front view of an existing magnet on a substrate.

[0020] Figure 5 This is a top view of the existing magnet on the substrate.

[0021] Figure 6 This is a front view of the existing stator.

[0022] The labels in the attached diagram are: 1-magnet, 2-substrate, 3-isolation sheet, 4-isolation plate, 5-bottom adhesive layer, 6-skeleton. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0024] Example 1 (Best Example). The stator of an S131 type CNC internal and external grinding machine was repaired. All magnets 1 on the six substrates 2 were removed, and the adhesive layer on the surfaces of the substrates 2 and magnets 1 was cleaned, followed by cleaning with industrial alcohol. Figures 1 to 3 As shown, a prepared epoxy resin adhesive (which has the characteristics of high mechanical properties, strong adhesion, good processability, electrical insulation, good stability, and excellent chemical resistance) is applied to substrate 2. To prevent the epoxy resin adhesive from being squeezed out during bonding of magnet 1, thus failing to achieve the required bonding strength, a 0.1mm gap is maintained between magnet 1 and the substrate. 17mm×2mm×0.1mm white paper is attached to both ends of each magnet as a spacer. The magnets are then fixed to substrate 2 according to the drawing requirements (i.e., the original bonding positions). Adjacent magnets 1 are separated by 5mm×5mm×1.6mm plastic sheets. Based on the arrangement of the magnetic poles, magnet 1 is first bonded to six substrates 2 and left to stand for 24 hours to allow the epoxy resin adhesive between magnet 1 and substrate 2 to cure and form the bottom bonding layer 5. Next, the gaps between all the magnets 1 are sealed with epoxy resin. The height of the encapsulation is flush with the surface of the magnet 1. After the epoxy resin of the encapsulation is cured, a grid-like skeleton 6 is formed to connect all the magnets 1 into an integral structure and to seal the gaps in the magnetic circuit.

[0025] Example 2. A method for repairing the stator of a CNC internal and external grinding machine, comprising the following steps:

[0026] a. To obtain better bonding strength, clean the fallen magnet 1 with industrial alcohol to obtain product A.

[0027] b. To prevent the epoxy resin from being squeezed out during bonding, thus failing to achieve the required bonding strength, a certain gap needs to be maintained between the magnet 1 and the substrate 2, ideally 0.1mm. Therefore, insulating sheets 3 are bonded to both sides of the bonding surface of product A to the substrate 2. The insulating sheets 3 are white paper 17mm long, 2mm wide, and 0.1mm thick, resulting in product B.

[0028] c. To obtain better bonding strength, clean the mounting position of the fallen magnet 1 on the substrate 2 with industrial alcohol. Apply epoxy resin adhesive to the bottom surface of the mounting position, and then adhere product B to the bottom surface of the mounting position. Place a positioning spacer plate 4 on the wide side of product B. The spacer plate 4 is a plastic sheet with a length of 5mm, a width of 5mm, and a thickness of 1.6mm, so that the distance between product B and the adjacent magnet 1 is 1.6mm. Let it stand for 24 hours. After the epoxy resin adhesive dries, it forms the bottom bonding layer 5, resulting in product C.

[0029] d. Seal C with epoxy resin, keeping the injection height flush with the outer surface of magnet 1. After the epoxy resin cures, the repair is completed. The cured epoxy resin forms a grid-like skeleton 6 that connects all magnets 1 on the substrate 2 into an integral structure.

[0030] Example 1 is a pre-repair performed before the magnet falls off the stator, and Example 2 is a repair performed after the magnet has fallen off the stator.

Claims

1. A method for repairing the stator of a CNC internal and external grinding machine, characterized in that: Includes the following steps, a. Clean the fallen magnet (1) with industrial alcohol to obtain product A. b. Adhere insulating sheets (3) to both sides of the bonding surface of product A to the substrate (2) to obtain product B. c. Clean the mounting position of the fallen magnet (1) on the substrate (2) with industrial alcohol, apply glue to the bottom surface of the mounting position, and attach product B to the bottom surface of the mounting position. Place the positioning spacer plate (4) on the wide side of product B to obtain product C. d. Seal C with glue, keeping the glue level with the outer surface of the magnet (1). The repair is completed after the glue has cured.

2. The method for repairing the stator of a CNC internal and external grinding machine according to claim 1, characterized in that: In step b, the isolation sheet (3) is 0.1 mm thick.

3. The method for repairing the stator of a CNC internal and external grinding machine according to claim 2, characterized in that: The isolation sheet (3) is a piece of white paper that is 17 mm long, 2 mm wide, and 0.1 mm thick.

4. The method for repairing the stator of a CNC internal and external grinding machine according to claim 1, characterized in that: In step c, the thickness of the isolation plate (4) is 1.6 mm.

5. The method for repairing the stator of a CNC internal and external grinding machine according to claim 4, characterized in that: The isolation sheet (4) is a plastic sheet that is 5 mm long, 5 mm wide, and 1.6 mm thick.

6. The method for repairing the stator of a CNC internal and external grinding machine according to claim 1, characterized in that: The adhesive used in both step c and step d is epoxy resin adhesive.

7. The method for repairing the stator of a CNC internal and external grinding machine according to claim 1, characterized in that: The model of the CNC internal and external grinding machine is S131.

Images