A high-precision thin-wall bearing ring machining process for non-magnetic material

Abstract

The application discloses a kind of high-precision thin-wall bearing ring machining process to non-magnetic material, including positioning tooling, the positioning tooling includes positioning mechanism, and positioning mechanism includes upper tooling and lower tooling, the top outer wall of upper tooling is fixedly connected with screw lifting driving rod, and is connected with screw driving equipment by screw lifting driving rod, upper tooling outer movable sleeve joint has ring, and the connecting portion of upper tooling and ring is provided with gasket, and the outer wall of one side of upper tooling is provided with external thread;The inner movable connection of lower tooling has inner support sleeve, and inner support sleeve is provided with internal thread in, and inner support sleeve is connected with upper tooling by internal thread and external thread engagement, and the bottom of inner support sleeve is provided with lifting mechanism, the bottom inner wall of lower tooling is provided with air slot, and lifting mechanism is located in air slot;High-precision thin-wall bearing ring machining process to non-magnetic material disclosed in the application has the effect of guaranteeing the perpendicularity of ring and magnetic positioner, further guaranteeing the processing precision of ring.

Description

Technical Field

[0001] This invention relates to the field of bearing ring processing technology, and in particular to a high-precision thin-walled bearing ring processing technology for non-magnetic materials. Background Technology

[0002] Bearing rings are ring-shaped parts of radial rolling bearings with one or more raceways. During the operation of rolling bearings, they bear large loads and are accompanied by sliding. These bearing rings include various types such as inner rings and outer rings, and their manufacturing process involves multiple steps such as cutting, turning, heat treatment, precision grinding of end faces, and precision grinding of the outer diameter.

[0003] During the grinding process, pressure rotor positioning can be used to position small-diameter non-magnetic steel bearing rings. However, this method cannot be reliably applied to large-diameter, thin-walled bearing rings or collars with a diameter of Φ35mm or more and an outer diameter of Φ37mm or less. Therefore, this invention is designed to address the positioning issues when non-magnetic rings cannot be machined, thereby enabling the grinding of non-magnetic rings. Summary of the Invention

[0004] This invention discloses a high-precision machining process for thin-walled bearing rings made of non-magnetic materials, aiming to solve the technical problem of the lack of a mature machining method for large-hole thin-walled non-magnetic steel rings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-precision machining process for thin-walled bearing rings made of non-magnetic materials includes a positioning fixture. The positioning fixture includes a positioning mechanism, which comprises an upper fixture and a lower fixture. A spiral lifting drive rod is fixedly connected to the top outer wall of the upper fixture, and a spiral drive device is connected to the spiral lifting drive rod. A ring is movably sleeved on the upper fixture, and a gasket is provided at the connection between the upper fixture and the ring. An external thread is provided on one side of the outer wall of the upper fixture. An inner support sleeve is movably connected to the lower fixture, and an internal thread is provided inside the inner support sleeve. The inner support sleeve is connected to the upper fixture through the engagement of the internal and external threads. A lifting mechanism is provided at the bottom end of the inner support sleeve. A groove is provided on the inner wall of the bottom end of the lower fixture, and the lifting mechanism is located in the groove. A magnetically conductive accessory is snapped onto the top inner wall of the lower fixture, and the magnetically conductive accessory fits against the ring. A magnetic locator is connected to the outside of the lower fixture.

[0007] The specific steps include the following:

[0008] S1: Design corresponding positioning tools and equipment for the grinding hole process and the grinding groove process respectively;

[0009] S2: Place the ring to be processed onto the bottom of the upper fixture;

[0010] S3: The upper tooling is driven to descend by the screw lifting drive rod. The internal and external threads mesh with each other. During the descent of the upper tooling screw, the collar is pushed down synchronously, so that the collar is pressed into the magnetic accessory.

[0011] S4: The magnetic guide accessory guides the magnetic positioner, causing the ring to adhere to the magnetic guide accessory;

[0012] S5: After fixing the ring, rotate the upper fixture to detach it, and then perform the corresponding processes. The positioning fixtures for the grinding hole and grinding groove processes are used separately.

[0013] S6: Material feeding;

[0014] In step S2, the collar is fitted over the gasket of the upper tooling, and one side of the upper tooling is engaged with the top outer wall of the collar to push the collar.

[0015] By incorporating a positioning mechanism, the positioning mechanism simultaneously drives the collar downwards during the descent of the upper fixture, pushing it into the magnetic guide attachment. The magnetic guide attachment guides the magnetic positioner, allowing the collar to adhere to it. Thus, the stable cooperation between the magnetic guide attachment and the collar, along with the limiting effect of the inner support sleeve on the bottom of the collar, ensures the perpendicularity between the collar and the magnetic positioner, further guaranteeing the processing accuracy of the collar.

[0016] In a preferred embodiment, a discharge port is provided through one side of the outer wall of the lower tooling, and the lifting mechanism includes two lead screws. The two lead screws are set in a slot, and the two ends of the lead screws are movably connected to the inner wall of the lower tooling through a first bearing and a second bearing, respectively. Each lead screw is engaged with a nut slider, and the nut slider is fixed to the bottom outer wall of the inner support sleeve through a support frame. The outer wall of the inner support sleeve is movably attached to the inner wall of the lower tooling. The bottom end of each lead screw is fixedly connected to a synchronous pulley, and multiple synchronous pulleys are simultaneously connected through a synchronous belt. One side of the outer wall of one synchronous pulley is fixedly connected to a first gear, and the outer wall of the first gear is movably engaged with a second gear. The middle of the second gear is fixedly connected to a support shaft, and the two ends of the support shaft are movably connected to bearing frames, which are fixed to the outer wall of the lower tooling. One end of the support shaft is fixedly connected to a motor.

[0017] S6 includes the following specific steps:

[0018] S61: The lifting mechanism drives the inner support sleeve to fall along the inner wall of the lower tooling, reducing the height of the inner support sleeve;

[0019] S62: The spiral lifting drive rod once again drives the upper tooling to descend, pushing the collar to fall and disengage from the magnetic attachment;

[0020] S63: Remove the ring from the feed port.

[0021] By incorporating a lifting mechanism, the motor rotates, causing the support frame to descend along the inner wall of the lower fixture. As the spiral lifting drive rod drives the upper fixture to fall again, the ring adsorbed on the magnetic attachment is pushed downwards until it detaches from the magnetic attachment and is removed from the discharge port. Thus, by using the lifting mechanism to assist in the separation of the magnetic attachment and the ring, the ring is effectively prevented from deforming, further ensuring the processing accuracy of the ring.

[0022] As described above, a high-precision thin-walled bearing ring processing technology for non-magnetic materials includes a positioning fixture. The positioning fixture includes a positioning mechanism, which comprises an upper fixture and a lower fixture. A spiral lifting drive rod is fixedly connected to the top outer wall of the upper fixture, and a spiral drive device is connected through the spiral lifting drive rod. A ring is movably sleeved on the upper fixture, and a gasket is provided at the connection between the upper fixture and the ring. An external thread is provided on one side of the outer wall of the upper fixture. An inner support sleeve is movably connected inside the lower fixture, and an internal thread is provided inside the inner support sleeve. The inner support sleeve is connected to the upper fixture through the engagement of the internal and external threads. A lifting mechanism is provided at the bottom end of the inner support sleeve. A slot is provided on the bottom inner wall of the lower fixture, and the lifting mechanism is located in the slot. A magnetically conductive accessory is snapped onto the top inner wall of the lower fixture, and the magnetically conductive accessory is in contact with the ring. A magnetic locator is connected to the outside of the lower fixture. The high-precision thin-walled bearing ring processing technology for non-magnetic materials provided by this invention has the technical effect of ensuring the perpendicularity of the ring to the magnetic positioner, and further ensuring the processing accuracy of the ring. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a positioning fixture for high-precision machining of thin-walled bearing rings made of non-magnetic materials, as proposed in this invention.

[0024] Figure 2 This is a cross-sectional view of a positioning fixture for a high-precision machining process of non-magnetic thin-walled bearing rings proposed in this invention.

[0025] Figure 3 This is a schematic diagram of the disassembled structure of the lifting mechanism for a high-precision thin-walled bearing ring processing technology for non-magnetic materials proposed in this invention.

[0026] Figure 4 This is an overall flow chart of a high-precision thin-walled bearing ring processing technology for non-magnetic materials proposed in this invention.

[0027] In the diagram: 1. Screw lifting drive rod; 2. Positioning mechanism; 3. Discharge port; 4. Lifting mechanism; 201. Upper tooling; 202. Shim; 203. Collar; 204. Lower tooling; 205. Inner support sleeve; 206. Hollow groove; 207. Internal thread; 208. External thread; 209. Magnetic guide accessory; 401. First bearing; 402. Support frame; 403. Lead screw; 404. Second bearing; 405. First gear; 406. Bearing frame; 407. Second gear; 408. Support shaft; 409. Motor; 410. Nut slider; 411. Synchronous pulley; 412. Synchronous belt. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] The high-precision thin-walled bearing ring processing technology disclosed in this invention is mainly applied to the processing of bearing rings.

[0030] Reference Figure 1 and Figure 2 A high-precision thin-walled bearing ring processing technology for non-magnetic materials includes a positioning fixture, which includes a positioning mechanism 2. The positioning mechanism 2 includes an upper fixture 201 and a lower fixture 204. A spiral lifting drive rod 1 is fixedly connected to the top outer wall of the upper fixture 201, and a spiral drive device is connected through the spiral lifting drive rod 1. A ring 203 is movably sleeved on the upper fixture 201, and a gasket 202 is provided at the connection between the upper fixture 201 and the ring 203. An external thread 208 is provided on one side outer wall of the upper fixture 201.

[0031] The lower tooling 204 is movably connected to an inner support sleeve 205, and the inner support sleeve 205 is provided with an internal thread 207. The inner support sleeve 205 is connected to the upper tooling 201 through the engagement of the internal thread 207 and the external thread 208. The bottom end of the inner support sleeve 205 is provided with a lifting mechanism 4. The bottom inner wall of the lower tooling 204 is provided with a slot 206, and the lifting mechanism 4 is located in the slot 206.

[0032] A magnetic attachment 209 is snapped onto the inner wall of the top of the lower tooling 204, and the magnetic attachment 209 is in contact with the collar 203. A magnetic positioner is connected to the outside of the lower tooling 204. In the positioning mechanism 2, the collar 203 is placed on the outside of the upper tooling 201, and the collar 203 is kept on the outer wall of the upper tooling 201 by the gasket 202. As the spiral lifting drive rod 1 drives the upper tooling 201 to spiral down, the engagement between the upper tooling 201 and the inner support sleeve 205 ensures the smooth descent of the upper tooling 201. For stability, during the descent of the upper tooling 201, the collar 203 is simultaneously driven down and pushed into the magnetic guide attachment 209. The magnetic guide attachment 209 guides the magnetic positioner, allowing the collar 203 to adhere to it. Thus, the stable cooperation between the magnetic guide attachment 209 and the collar 203, as well as the limiting effect of the inner support sleeve 205 on the bottom of the collar 203, ensures the perpendicularity of the collar 203 to the magnetic positioner, further guaranteeing the machining accuracy of the collar 203.

[0033] Reference Figure 3 In a preferred embodiment, the following specific steps are included:

[0034] S1: Design corresponding positioning tools and equipment for the grinding hole process and the grinding groove process respectively;

[0035] S2: Place the ferrule 203 to be processed onto the bottom of the upper fixture 201;

[0036] S3: The upper tooling 201 is driven to descend spirally by the spiral lifting drive rod 1. The internal thread 207 and the external thread 208 mesh with each other. During the spiral descent of the upper tooling 201, the collar 203 is pushed down synchronously, so that the collar 203 is pressed into the magnetic accessory 209.

[0037] S4: The magnetic guide accessory 209 guides the magnetic positioner so that the collar 203 is attracted to the magnetic guide accessory 209;

[0038] S5: After fixing the collar 203, rotate the upper fixture 201 to disengage it, and then perform the corresponding processes. The positioning fixtures for the grinding hole and grinding groove processes are used separately.

[0039] S6: Feeding.

[0040] Reference Figure 2 In a preferred embodiment, in S2, the collar 203 is fitted over the gasket 202 of the upper tooling 201, and one side of the upper tooling 201 is engaged with the top outer wall of the collar 203 to push the collar 203.

[0041] Reference Figures 1-3In a preferred embodiment, a discharge port 3 is provided through one side of the outer wall of the lower tooling 204, and the lifting mechanism 4 includes two lead screws 403, which are disposed in the slot 206, and the two ends of the lead screws 403 are movably connected to the inner wall of the lower tooling 204 through the first bearing 401 and the second bearing 404, respectively.

[0042] Reference Figure 2 and Figure 3 In a preferred embodiment, each lead screw 403 is respectively engaged with a nut slider 410, and the nut slider 410 is fixed to the bottom outer wall of the inner support sleeve 205 by the support frame 402, and the outer wall of the inner support sleeve 205 is movably attached to the inner wall of the lower tooling 204.

[0043] Reference Figure 2 and Figure 3 In a preferred embodiment, each lead screw 403 is fixedly connected to a timing pulley 411 at its bottom end, and multiple timing pulleys 411 are connected simultaneously by a timing belt 412. A first gear 405 is fixedly connected to one side of the outer wall of one of the timing pulleys 411.

[0044] Reference Figure 2 and Figure 3 In a preferred embodiment, the outer wall of the first gear 405 is movably meshed with the second gear 407, and the middle of the second gear 407 is fixedly connected to the support shaft 408. The two ends of the support shaft 408 are movably connected to the bearing brackets 406, and the bearing brackets 406 are fixed to the outer wall of the lower tooling 204. One end of the support shaft 408 is fixedly connected to the motor 409.

[0045] Reference Figure 4 In a preferred embodiment, S6 includes the following specific steps:

[0046] S61: The lifting mechanism 4 drives the inner support sleeve 205 to fall along the inner wall of the lower tooling 204, reducing the height of the inner support sleeve 205;

[0047] S62: The spiral lifting drive rod 1 once again drives the upper tooling 201 to descend, pushing the collar 203 to fall and disengage from the magnetic accessory 209;

[0048] S63: The collar 203 is taken out from the discharge port 3. In the lifting mechanism 4, the motor 409 rotates, driving the second gear 407 to rotate, which in turn drives the first gear 405 to rotate. Since the first gear 405 is fixed on one of the synchronous pulleys 411, the synchronous belt 412 drives multiple synchronous pulleys 411 to rotate, thereby realizing the rotation of multiple lead screws 403, which drives the nut slider 410 to rise and fall. The support frame 402 drives the inner support sleeve 205 to descend along the inner wall of the lower tooling 204. As the spiral lifting drive rod 1 drives the upper tooling 201 to fall again, the collar 203 adsorbed on the magnetic attachment 209 can be pushed downward until it is detached from the magnetic attachment 209 and taken out from the discharge port 3. Thus, by using the lifting mechanism 4 to assist the separation of the magnetic attachment 209 and the collar 203, the collar 203 can be effectively prevented from deforming, further ensuring the processing accuracy of the collar 203.

[0049] Working principle: Before grinding, the collar 203 is positioned by a positioning fixture. In the positioning mechanism 2, the collar 203 is placed on the outer side of the upper fixture 201. The shim 202 keeps the collar 203 on the outer wall of the upper fixture 201. As the spiral lifting drive rod 1 drives the upper fixture 201 to descend spirally, the upper fixture 201 is stabilized by meshing with the inner support sleeve 205. During the descent of the upper fixture 201, the collar 203 is simultaneously driven down and pushed into the magnetic guide attachment 209. The magnetic guide attachment 209 guides the magnetic positioner, allowing the collar 203 to adhere to it. Thus, the stable cooperation between the magnetic guide attachment 209 and the collar 203, and the limiting effect of the inner support sleeve 205 on the bottom of the collar 203, ensure the perpendicularity of the collar 203 to the magnetic positioner, further ensuring the stability of the collar 203. In addition to the machining accuracy of 03, in the lifting mechanism 4, the rotation of the motor 409 drives the second gear 407 to rotate, which in turn drives the first gear 405 to rotate. Since the first gear 405 is fixed on one of the synchronous pulleys 411, the synchronous belt 412 drives multiple synchronous pulleys 411 to rotate, thereby realizing the rotation of multiple lead screws 403, which in turn drives the nut slider 410 to rise and fall. The support frame 402 drives the inner support sleeve 205 to descend along the inner wall of the lower tooling 204. As the screw lifting drive rod 1 drives the upper tooling 201 to fall again, the collar 203 adsorbed on the magnetic attachment 209 can be pushed downward until it is detached from the magnetic attachment 209 and taken out from the discharge port 3. Thus, by using the lifting mechanism 4 to assist the separation of the magnetic attachment 209 and the collar 203, the collar 203 can be effectively prevented from deforming, further ensuring the machining accuracy of the collar 203.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-precision machining process for thin-walled bearing rings made of non-magnetic materials, comprising positioning fixtures, characterized in that, The positioning fixture includes a positioning mechanism (2), and the positioning mechanism (2) includes an upper fixture (201) and a lower fixture (204). A spiral lifting drive rod (1) is fixedly connected to the top outer wall of the upper fixture (201), and a spiral drive device is connected through the spiral lifting drive rod (1). A collar (203) is movably sleeved on the upper fixture (201), and a gasket (202) is provided at the connection between the upper fixture (201) and the collar (203). An external thread (208) is provided on one side of the outer wall of the upper fixture (201). An inner support sleeve (205) is movably connected inside the lower fixture (204), and an internal thread (207) is provided inside the inner support sleeve (205). The inner support sleeve (205) is connected through the internal thread (207). The lower tooling (204) is connected to the upper tooling (201) by engaging with the external thread (208), and the bottom end of the inner support sleeve (205) is provided with a lifting mechanism (4). The bottom inner wall of the lower tooling (204) is provided with a slot (206), and the lifting mechanism (4) is located in the slot (206). The top inner wall of the lower tooling (204) is fitted with a magnetic accessory (209), and the magnetic accessory (209) is in contact with the collar (203). A magnetic locator is connected to the outside of the lower tooling (204). A discharge port (3) is provided through one side of the outer wall of the lower tooling (204). The processing technology includes the following specific steps: S1: Design corresponding positioning tools and equipment for the grinding hole process and the grinding groove process respectively; S2: Place the ring (203) to be processed onto the bottom of the upper fixture (201); S3: The upper tool (201) is driven to descend by the screw lifting drive rod (1), the internal thread (207) and the external thread (208) mesh with each other, and the upper tool (201) pushes the collar (203) down synchronously during the spiral descent, so that the collar (203) is pressed into the magnetic accessory (209); S4: The magnetic attachment (209) guides the magnetic positioner so that the collar (203) is attracted to the magnetic attachment (209); S5: After fixing the collar (203), rotate the upper fixture (201) to disengage the upper fixture (201) and then perform the corresponding processes. The positioning fixtures for the grinding hole and grinding groove processes are used separately. S6: Material feeding; The S6 includes the following specific steps: S61: The lifting mechanism (4) drives the inner support sleeve (205) to fall along the inner wall of the lower tooling (204), reducing the height of the inner support sleeve (205); S62: The spiral lifting drive rod (1) drives the upper tooling (201) to fall again, pushing the collar (203) to fall away from the magnetic accessory (209); S63: The collar (203) is taken out from the discharge port (3).

2. The high-precision thin-walled bearing ring machining process for non-magnetic materials according to claim 1, characterized in that, In S2, the collar (203) is fitted over the gasket (202) of the upper tooling (201), and one side of the upper tooling (201) is engaged with the top outer wall of the collar (203) to push the collar (203).

3. The high-precision thin-walled bearing ring machining process for non-magnetic materials according to claim 1, characterized in that, The lifting mechanism (4) includes two lead screws (403), which are set in the slot (206), and the two ends of the lead screws (403) are movably connected to the inner wall of the lower tooling (204) through the first bearing (401) and the second bearing (404) respectively.

4. The high-precision thin-walled bearing ring machining process for non-magnetic materials according to claim 3, characterized in that, Each lead screw (403) is respectively engaged with a nut slider (410), and the nut slider (410) is fixed to the bottom outer wall of the inner support sleeve (205) by the support frame (402), and the outer wall of the inner support sleeve (205) is movably attached to the inner wall of the lower tooling (204).

5. The high-precision thin-walled bearing ring machining process for non-magnetic materials according to claim 4, characterized in that, Each lead screw (403) is fixedly connected to a synchronous pulley (411) at its bottom end, and multiple synchronous pulleys (411) are connected simultaneously through a synchronous belt (412). A first gear (405) is fixedly connected to one side of the outer wall of one of the synchronous pulleys (411).

6. The high-precision thin-walled bearing ring machining process for non-magnetic materials according to claim 5, characterized in that, The outer wall of the first gear (405) is movably meshed with the second gear (407), and the second gear (407) is fixedly connected to the middle of the shaft (408). The two ends of the shaft (408) are movably connected to the bearing bracket (406), and the bearing bracket (406) is fixed to the outer wall of the lower tooling (204). One end of the shaft (408) is fixedly connected to the motor (409).

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