A method for improving the retainer structure of a cylindrical roller bearing

Abstract

The present invention relates to the technical field of bearing retainers, specifically a method for improving the structure of a cylindrical roller bearing retainer, and the steps are as follows: S1, main body production; S2, grinding and finishing; S3, surface polishing; S4, hole and slot production; S5, roughening treatment; S6, quenching treatment; S7, tempering treatment; S8, spraying treatment; S9, spraying surface grinding; S10, accessory installation; S11, pre-installation test; S12, oiling and packaging. The first bracket and the second bracket of the present invention are detachable structures, which are convenient for the installation of cylindrical rollers. The cylindrical roller slot limits the cylindrical roller, and the magnetic block magnetically attracts and guides the cylindrical roller so that it is consistent with the axis of the cylindrical roller slot, thereby improving the smoothness of the rolling of the cylindrical roller. The first support ring, the first limit block, the second support ring and the second limit block are made of aluminum alloy, and the heat resistance and wear resistance of the first support ring, the first limit block, the second support ring and the second limit block are increased by the sprayed tungsten carbide hardening layer.

Description

Technical Field

[0001] The invention relates to the technical field of bearing retainers, in particular to a method for improving the structure of a cylindrical roller bearing retainer. Background Art

[0002] A bearing retainer is a bearing cage that wraps all or part of a bearing and moves with it. It is used to isolate rolling elements and usually guide them in the bearing. There are many types of rolling elements, such as balls, cylindrical rollers, tapered rollers, and needle rollers. The rolling elements in the retainer structure of cylindrical roller bearings are cylindrical rollers, which are mostly used to process bearings with higher pressure.

[0003] A Chinese patent discloses a cylindrical roller bearing retainer structure with an oil groove (authorization announcement number CN218670235U). This patented technology effectively reduces dust and impurities through the protection of a control button. The oil enters the oil reservoir through a baffle cap and an oil pipe, preventing blockage inside the reservoir. This ensures the cleanliness of the roller surface and enables the roller to rotate normally. However, the above-mentioned bearing retainer structure is an integrated structure, and the cylindrical roller is installed by snap-fitting, which is inconvenient to install. After installation, the bearing retainer structure has poor stability, affecting the smoothness of the cylindrical roller's rolling. The bearing retainer structure also has poor heat resistance and wear resistance, resulting in a short service life. Therefore, those skilled in the art provide a method for improving the retainer structure of a cylindrical roller bearing to address the problems raised in the above-mentioned background technology. Summary of the Invention

[0004] The object of the present invention is to provide a method for improving the structure of a cylindrical roller bearing retainer to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for improving the structure of a cylindrical roller bearing retainer, comprising the following steps:

[0006] S1. Main body production: Use hot-melt aluminum alloy injection molding to produce the first support ring, the first limit block, the second support ring and the second limit block;

[0007] S2, grinding and finishing: removing the burrs on the outer sides of the first support ring, the first limit block, the second support ring and the second limit block, and grinding the outer surfaces of the first support ring, the first limit block, the second support ring and the second limit block;

[0008] S3, surface polishing: use a nylon grinding head to polish the surface of the first support ring, the first limit block, the second support ring and the second limit block to a polishing smoothness of 10 to 15 μm;

[0009] S4. Hole and slot production: Slots are made at corresponding positions on the inner sides of the first support ring and the second support ring to obtain mounting slots, a fixing hole is drilled at the front end of the second limit block to obtain an internal thread production tool, an internal thread is produced on the inner side of the fixing hole, mounting holes adapted for the fixing screw are drilled inside the first support ring and the first limit block, and cylindrical roller slots are opened on both sides of the first limit block and the second limit block;

[0010] S5, roughening treatment: roughening the outer sides of the first limit block and the second limit block, with a roughening depth of 0.5 to 0.9 mm;

[0011] S6, quenching treatment: putting the first support ring, the first limit block, the second support ring and the second limit block into a heating furnace for heating treatment, taking out the first support ring, the first limit block, the second support ring and the second limit block and putting them into a quenching liquid for quenching;

[0012] S7, tempering treatment: first heat the first support ring, the first limit block, the second support ring and the second limit block in a heating furnace at 110-120°C for 5-6 hours, then heat them in a heating furnace at 150-160°C for 2.5-3 hours, take out the first support ring, the first limit block, the second support ring and the second limit block and transport them to a cooling room for cooling;

[0013] S8, spraying treatment: spraying the first support ring, the first limit block, the second support ring and the second limit block to complete the production of the tungsten carbide hardened layer;

[0014] S9, spraying surface grinding: the first support ring, the first limit block, the second support ring and the second limit block are put into the drum grinder for grinding;

[0015] S10. Accessory installation: Install the rubber gasket to the rear end of the fixing screw, insert the fixing screw into the mounting hole, and fix the magnetic block to the inside of the mounting slot to complete the accessory installation;

[0016] S11. Pre-installation test: clamp the cylindrical roller to the inner side of the first limit block and the second limit block through the cylindrical roller slot, the first limit block corresponds to the second limit block, the rear end of the fixing screw rotates inside the fixing hole, and the installation of the first bracket and the second bracket is completed. Rotate the cylindrical roller inside the cylindrical roller slot to test the smoothness of the cylindrical roller. The magnetic block magnetically attracts the two ends of the cylindrical roller to position the cylindrical roller. When the test is qualified, the rear end of the rubber gasket is rotated out of the fixing hole, and the connection between the first limit block and the second limit block is separated. The first bracket, the second bracket and the fixing screw are placed in a qualified product storage box. When the test is unqualified, the rear end of the rubber gasket is rotated out of the fixing hole, and the connection between the first limit block and the second limit block is separated. The first bracket, the second bracket and the fixing screw are placed in a unqualified product storage box. The unqualified cylindrical roller bearing retainer structure is disassembled and remanufactured.

[0017] S12. Oiling and packaging: Apply bearing grease to the outside of the first bracket and the second bracket, and put the first bracket, the second bracket and the fixing screw into a plastic bag.

[0018] As a further solution of the present invention: the front end of the fixing screw is located at an internal position of the first support ring and the first limit block, and the rear end of the fixing screw rotates at an internal position of the fixing hole.

[0019] As a further solution of the present invention: the positions of the first limiting block correspond to those of the second limiting block, and the first limiting block is fixed to the front side of the second limiting block by a fixing screw.

[0020] As a further solution of the present invention: the injection molding steps in S1 are as follows:

[0021] S01, making a mold for a first support ring, a first limiting block, a second support ring, and a second limiting block, wherein the first support ring and the first limiting block are an integral structure, and the second support ring and the second limiting block are an integral structure;

[0022] S02, spray lime powder into the mold, pour hot-melt aluminum alloy into the mold, and complete injection molding;

[0023] S03. After the aluminum alloy in the mold cools down, the mold is opened and the material is taken out to obtain a first support ring, a first limit block, a second support ring and a second limit block.

[0024] As a further solution of the present invention: the heating treatment temperature in S6 is 440-490° C. and the time is 20-30 minutes.

[0025] As a further solution of the present invention: the temperature of the quenching liquid in S6 is 30-45° C., and the quenching time in the quenching liquid is 5-7 minutes.

[0026] As a further solution of the present invention: the temperature of the cooling chamber in S7 is 30-45° C., and the cooling time is 2.5-3 hours.

[0027] As a further solution of the present invention: before spraying the tungsten carbide hardened layer in S8, the contact surface between the first limit block and the second limit block is sealed with tape, and after the tungsten carbide hardened layer is cooled, the tape on the contact surface between the first limit block and the second limit block is removed, and the thickness of the tungsten carbide hardened layer is 1.5 to 2 mm.

[0028] As a further solution of the present invention: the cylindrical roller groove in S11 is adapted to the cylindrical roller, and the cylindrical roller slides at an inner position of the cylindrical roller groove.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention relates to a method for improving the retainer structure of a cylindrical roller bearing. The first and second brackets are detachable structures, facilitating the installation of the cylindrical roller. The cylindrical roller retaining groove limits the cylindrical roller, and the magnetic block magnetically attracts and guides the cylindrical roller so that its axis is aligned with the cylindrical roller retaining groove. After installation, the bearing retainer structure has high stability and improves the smoothness of the cylindrical roller's rolling.

[0031] 2. The first support ring, the first limit block, the second support ring and the second limit block are made of aluminum alloy. The tungsten carbide hardened layer sprayed on them increases their heat resistance and wear resistance, thereby extending the service life of the bearing retainer structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of a cylindrical roller bearing retainer structure improvement method;

[0033] Figure 2 This is a schematic structural diagram of a first bracket in a method for improving the structure of a cylindrical roller bearing retainer;

[0034] Figure 3 The figure is a schematic diagram of the structure of the second bracket in a method for improving the structure of a cylindrical roller bearing retainer.

[0035] In the figure: 1. First bracket; 2. Second bracket; 3. Fixing screw; 4. First support ring; 5. First limit block; 6. Second support ring; 7. Second limit block; 8. Cylindrical roller slot; 9. Fixing hole; 10. Tungsten carbide hardened layer; 11. Mounting slot; 12. Magnetic block; 13. Rubber gasket. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] See also Figures 1 to 3 In an embodiment of the present invention, a method for improving the retainer structure of a cylindrical roller bearing comprises the following steps:

[0038] S1. Main body production: Use hot-melt aluminum alloy injection molding to produce the first support ring 4, the first limit block 5, the second support ring 6 and the second limit block 7. The injection molding steps are as follows:

[0039] S01, making a mold for the first support ring 4, the first limiting block 5, the second support ring 6 and the second limiting block 7, wherein the first support ring 4 and the first limiting block 5 are an integral structure, and the second support ring 6 and the second limiting block 7 are an integral structure;

[0040] S02, spray lime powder into the mold, pour hot-melt aluminum alloy into the mold, and complete injection molding;

[0041] S03, after the aluminum alloy in the mold has cooled, the mold is opened and the material is taken out to obtain the first support ring 4, the first limit block 5, the second support ring 6 and the second limit block 7;

[0042] S2, grinding and finishing: remove the burrs on the outer sides of the first support ring 4, the first limit block 5, the second support ring 6 and the second limit block 7, and grind the outer surfaces of the first support ring 4, the first limit block 5, the second support ring 6 and the second limit block 7;

[0043] S3, surface polishing: use a nylon grinding head to polish the surface of the first support ring 4, the first limit block 5, the second support ring 6 and the second limit block 7 to a polishing smoothness of 10 to 15 μm;

[0044] S4. Hole and slot fabrication: Slots are made at corresponding positions on the inner sides of the first support ring 4 and the second support ring 6 to form mounting slots 11. A fixing hole 9 is drilled at the front end of the second limit block 7. An internal thread is fabricated on the inner side of the fixing hole 9. A mounting hole for the fixing screw 3 is drilled inside the first support ring 4 and the first limit block 5. Cylindrical roller slots 8 are provided on both sides of the first limit block 5 and the second limit block 7.

[0045] S5, roughening treatment: roughening the outer sides of the first limit block 5 and the second limit block 7, with a roughening depth of 0.5 to 0.9 mm;

[0046] S6, quenching treatment: put the first support ring 4, the first limit block 5, the second support ring 6 and the second limit block 7 into the heating furnace for heating treatment, take out the first support ring 4, the first limit block 5, the second support ring 6 and the second limit block 7 and put them into the quenching liquid for quenching, the heating treatment temperature in S6 is 440-490°C, the time is 20-30 minutes, the quenching liquid temperature is 30-45°C, and the quenching time in the quenching liquid is 5-7 minutes;

[0047] S7, tempering treatment: first heat the first support ring 4, the first limit block 5, the second support ring 6 and the second limit block 7 in a heating furnace at 110-120°C for 5-6 hours, and then heat them in a heating furnace at 150-160°C for 2.5-3 hours. Take out the first support ring 4, the first limit block 5, the second support ring 6 and the second limit block 7 and transport them to a cooling room for cooling. The cooling room temperature is 30-45°C and the cooling time is 2.5-3 hours.

[0048] S8, spraying treatment: spray the first support ring 4, the first limit block 5, the second support ring 6 and the second limit block 7 to complete the production of the tungsten carbide hardened layer 10. Before spraying the tungsten carbide hardened layer 10, use tape to seal the contact surface of the first limit block 5 and the second limit block 7. After the tungsten carbide hardened layer 10 cools, remove the tape on the contact surface of the first limit block 5 and the second limit block 7. The thickness of the tungsten carbide hardened layer 10 is 1.5-2 mm;

[0049] S9, spraying surface grinding: the first support ring 4, the first limit block 5, the second support ring 6 and the second limit block 7 are put into the drum grinder for grinding;

[0050] S10, accessory installation: Install the rubber gasket 13 to the rear end of the fixing screw 3, insert the fixing screw 3 into the mounting hole, and fix the magnetic block 12 to the inside of the mounting slot 11 to complete the accessory installation;

[0051] S11, pre-installation test: clamp the cylindrical roller to the inner side of the first limit block 5 and the second limit block 7 through the cylindrical roller slot 8, the first limit block 5 corresponds to the second limit block 7, the rear end of the fixing screw 3 rotates inside the fixing hole 9, and the installation of the first bracket 1 and the second bracket 2 is completed. Rotate the cylindrical roller inside the cylindrical roller slot 8 to test the smoothness of the cylindrical roller. The magnetic block 12 magnetically attracts the two ends of the cylindrical roller to position the cylindrical roller. When the test is qualified, the rear end of the rubber gasket 13 is rotated out of the fixing hole 9 to separate the connection between the first limit block 5 and the second limit block 7. Place the first bracket 1, the second bracket 2 and the fixing screw 3 in the qualified product storage box. When the test is unqualified, the rubber gasket 13 is rotated out of the fixing hole 9. The rear end of the gasket 13 is rotated out of the fixing hole 9, the connection between the first limit block 5 and the second limit block 7 is separated, the first bracket 1, the second bracket 2 and the fixing screw 3 are placed in the unqualified product storage box, the unqualified cylindrical roller bearing retainer structure is disassembled and remanufactured, the cylindrical roller slot 8 is adapted to the cylindrical roller, the cylindrical roller slides at the inner position of the cylindrical roller slot 8, the front end of the fixing screw 3 is located at the inner position of the first support ring 4 and the first limit block 5, the rear end of the fixing screw 3 is rotated to the inner position of the fixing hole 9, the position of the first limit block 5 corresponds to the second limit block 7, and the first limit block 5 is fixed to the front position of the second limit block 7 by the fixing screw 3;

[0052] S12. Grease and pack: Apply bearing grease to the outer sides of the first bracket 1 and the second bracket 2, and pack the first bracket 1, the second bracket 2 and the fixing screw 3 into a plastic bag.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0054] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A method for improving the structure of a cylindrical roller bearing retainer, characterized in that: Here are the steps: S1. Main body production: using hot-melt aluminum alloy injection molding to produce a first support ring (4), a first limit block (5), a second support ring (6) and a second limit block (7); S2, grinding and finishing: removing the burrs on the outer sides of the first support ring (4), the first limit block (5), the second support ring (6) and the second limit block (7), and grinding the outer surfaces of the first support ring (4), the first limit block (5), the second support ring (6) and the second limit block (7); S3, surface polishing: using a nylon grinding head to polish the surface of the first support ring (4), the first limit block (5), the second support ring (6) and the second limit block (7), with a polishing smoothness of 10 to 15 μm; S4, hole and slot production: grooves are cut at corresponding positions on the inner sides of the first support ring (4) and the second support ring (6) to obtain mounting grooves (11), a hole is drilled at the front end of the second limit block (7) to obtain a fixing hole (9), an internal thread is produced on the inner side of the fixing hole (9) using an internal thread production tool, a mounting hole adapted for the fixing screw (3) is drilled inside the first support ring (4) and the first limit block (5), and cylindrical roller slots (8) are opened on both sides of the first limit block (5) and the second limit block (7); S5, roughening treatment: roughening the outer sides of the first limiting block (5) and the second limiting block (7), with the roughening depth being 0.5 to 0.9 mm; S6, quenching treatment: putting the first support ring (4), the first limit block (5), the second support ring (6) and the second limit block (7) into a heating furnace for heating treatment, taking out the first support ring (4), the first limit block (5), the second support ring (6) and the second limit block (7) and putting them into a quenching liquid for quenching; S7, tempering treatment: first heat the first support ring (4), the first limit block (5), the second support ring (6) and the second limit block (7) in a heating furnace at 110-120°C for 5-6 hours, then heat them in a heating furnace at 150-160°C for 2.5-3 hours, take out the first support ring (4), the first limit block (5), the second support ring (6) and the second limit block (7), and transport them to a cooling room for cooling; S8, spraying treatment: spraying the first support ring (4), the first limit block (5), the second support ring (6) and the second limit block (7) to complete the production of the tungsten carbide hardened layer (10); S9, grinding the sprayed surface: the first support ring (4), the first limit block (5), the second support ring (6) and the second limit block (7) are put into a drum grinder for grinding; S10, accessory installation: the rubber gasket (13) is installed to the rear end of the fixing screw (3), the fixing screw (3) is inserted into the installation hole, and the magnetic block (12) is fixed to the inside of the installation slot (11), completing the installation of the accessory; S11, pre-installation test: clamp the cylindrical roller to the inner side of the first limit block (5) and the second limit block (7) through the cylindrical roller clamping groove (8), the first limit block (5) corresponds to the second limit block (7), the rear end of the fixing screw (3) rotates inside the fixing hole (9), and the installation of the first bracket (1) and the second bracket (2) is completed. Rotate the cylindrical roller inside the cylindrical roller clamping groove (8) to test the smoothness of the cylindrical roller. The magnetic block (12) magnetically attracts the two ends of the cylindrical roller to position the cylindrical roller. When the test is qualified, the rubber gasket ( The rear end of the rubber gasket (13) is rotated out of the fixing hole (9), the connection between the first limiting block (5) and the second limiting block (7) is separated, and the first bracket (1), the second bracket (2) and the fixing screw (3) are placed in a qualified product storage box. When the test is unqualified, the rear end of the rubber gasket (13) is rotated out of the fixing hole (9), the connection between the first limiting block (5) and the second limiting block (7) is separated, and the first bracket (1), the second bracket (2) and the fixing screw (3) are placed in a unqualified product storage box. The unqualified cylindrical roller bearing retainer structure is disassembled and recycled; S12. Grease and pack: Apply bearing grease to the outer sides of the first bracket (1) and the second bracket (2), and pack the first bracket (1), the second bracket (2) and the fixing screw (3) into a plastic bag.

2. A cylindrical roller bearing retainer structure improvement method according to claim 1, characterized in that: The front end of the fixing screw (3) is located at an internal position of the first support ring (4) and the first limit block (5), and the rear end of the fixing screw (3) is rotated at an internal position of the fixing hole (9).

3. The method for improving the retainer structure of a cylindrical roller bearing according to claim 1, wherein: The first limiting block (5) corresponds to the position of the second limiting block (7), and the first limiting block (5) is fixed to the front side of the second limiting block (7) by a fixing screw (3).

4. A cylindrical roller bearing retainer structure improvement method according to claim 1, characterized in that: The injection molding steps in S1 are as follows: S01, making a mold for a first support ring (4), a first limiting block (5), a second support ring (6) and a second limiting block (7), wherein the first support ring (4) and the first limiting block (5) are an integral structure, and the second support ring (6) and the second limiting block (7) are an integral structure; S02, spray lime powder into the mold, pour hot-melt aluminum alloy into the mold, and complete injection molding; S03. After the aluminum alloy in the mold has cooled, the mold is opened and the material is taken out to obtain a first support ring (4), a first limit block (5), a second support ring (6) and a second limit block (7).

5. The method for improving the retainer structure of a cylindrical roller bearing according to claim 1, characterized in that: The heating treatment temperature in S6 is 440-490° C. and the time is 20-30 minutes.

6. A cylindrical roller bearing retainer structure improvement method according to claim 1, characterized in that: The temperature of the quenching liquid in S6 is 30-45° C., and the quenching time in the quenching liquid is 5-7 minutes.

7. A cylindrical roller bearing retainer structure improvement method according to claim 1, characterized in that: In the step S7 , the temperature of the cooling chamber is 30-45° C., and the cooling time is 2.5-3 hours.

8. The method for improving the retainer structure of a cylindrical roller bearing according to claim 1, characterized in that: Before the tungsten carbide hardened layer (10) in S8 is sprayed, a tape is used to seal the contact surface between the first limit block (5) and the second limit block (7); after the tungsten carbide hardened layer (10) is cooled, the tape on the contact surface between the first limit block (5) and the second limit block (7) is removed; the thickness of the tungsten carbide hardened layer (10) is 1.5 to 2 mm.

9. The method for improving the retainer structure of a cylindrical roller bearing according to claim 1, characterized in that: The cylindrical roller retaining groove (8) in the S11 is adapted to the cylindrical roller, and the cylindrical roller slides at an inner position of the cylindrical roller retaining groove (8).

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