Bearing ring polishing device for bearing production
By designing a bearing ring polishing device including columns, inner steel rings and outer curved plates, the indentation problem caused by direct contact between the three-jaw chuck jaws, achieving higher processing accuracy and surface quality.
Patent Information
- Application Number
- CN202421155025.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-24
AI Technical Summary
During the polishing process of bearing rings, the jaws of the three-jaw chuck directly contact the bearing ring, resulting in indentation and unnecessary wear, affecting the processing accuracy and surface quality.
A polishing device including a machine and a three-claw chuck installed inside the machine is designed. By setting up a column and an inner steel ring in the middle of the three-claw chuck, and distributing an outer arc plate along the circumferential array outside the inner steel ring. , the sliding mechanism between the outer arc plate and the inner steel ring is used to achieve flexible clamping of the bearing ring to avoid direct contact between the clamping jaws.
The clamping jaws of the three-jaw chuck are effectively avoided from contacting the bearing ring directly, reducing unnecessary indentation and wear, increasing the clamping area, and improving the polishing accuracy and surface quality of the bearing ring.
Smart Images
Figure CN222493684U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bearing ring polishing, and specifically relates to a bearing ring polishing device for producing bearings. Background Art
[0002] The bearing ring is an important component of the bearing used to support the roller, and is mostly in the shape of a ring. It is made by forging metal materials into blanks, and then annealing, turning, heat treatment and grinding to finally become finished products. Among them, grinding, also known as polishing, can ensure that the bearing ring has high processing accuracy and good surface quality, and can achieve one-time molding and small and medium-sized batch production.
[0003] During the polishing process, CNC machining is a high-precision and high-efficiency processing method. CNC machine tools can automatically complete the processing process according to pre-set programs. The polishing of bearing rings is generally carried out using CNC grinders or CNC machining centers.
[0004] After heat treatment, the bearing ring is usually clamped by a three-jaw chuck and polished with a spindle-driven polishing knife. The bearing ring is often clamped twice on the three-jaw chuck. The second clamping requires clamping the previously ground surface. The jaws of the three-jaw chuck are very rough, which squeezes the ground surface to produce indentations. For this reason, we propose a bearing ring polishing device for bearing production. Utility Model Content
[0005] The utility model aims to provide a bearing ring polishing device for producing bearings, which can avoid the jaws of a three-jaw chuck from directly contacting the bearing ring, increase the clamping area, and reduce unnecessary indentations on the polishing surface of the bearing ring.
[0006] The technical solutions adopted in this utility are as follows:
[0007] A bearing ring polishing device for producing bearings comprises a machine platform and a three-jaw chuck installed inside the machine platform, a column and an inner steel ring are sequentially arranged in the middle of the three-jaw chuck from bottom to top, the central axis of the inner steel ring coincides with the central axis of the column, a sliding mechanism is arranged at the lower edge of the inner steel ring, a plurality of outer arc plates are distributed along a circumferential array on the outside of the inner steel ring, the middle of the outer side of the outer arc plates are respectively opposite to the clamping jaws of the three-jaw chuck, the outer arc plates are all slidably connected with the sliding mechanism, and a frosted film is fixed on one side of the outer arc plates close to the inner steel ring. During processing, the protective door of the machine platform is opened, the three-jaw chuck is fixed to the working table of the machine platform, and the column is inserted downward in the middle of the three-jaw chuck until it reaches the inner steel ring. Hold the upper surface of the machine workbench so that the outer arc plate is facing the jaws of the three-jaw chuck. At this time, put a bearing ring on the outside of the inner steel ring, and then tighten the three-jaw chuck with a wrench. The jaws of the three-jaw chuck gradually bite the outer arc plates, and the outer arc plates move toward the middle of the inner steel ring to press the bearing ring. The arc surface of the outer arc plate just sticks to the outer cylindrical surface of the bearing ring for clamping, avoiding the direct contact of the jaws of the three-jaw chuck with the bearing ring and increasing the clamping area. In this way, use the grinding tool of the machine to polish it once, and finally clamp the bearing ring in reverse. The first polished surface is clamped to reduce unnecessary indentations on the polished surface of the bearing ring. It can be removed after the second polishing, and the above steps are repeated for batch polishing of the bearing rings.
[0008] The sliding mechanism includes an annular platform fixed on the lower edge of the inner steel ring, and a plurality of sliding grooves are distributed along a circumferential array on the lower surface of the annular platform. The sliding grooves are all slidably connected with adjacent outer arc plates. The annular platform is outside the inner steel ring and is used to support the bearing ring, so that at least one-half of the bearing ring is higher than the inner steel ring, so that the two grinding ranges can cover the entire outer surface of the bearing ring, and the sliding grooves are used to limit the outer arc plate, so that the outer arc plate can only move along the radial direction of the inner steel ring, so as to face the bearing ring.
[0009] A threaded hole is provided on the lower surface of the column along the axial direction, which reduces the weight of the column and makes the column and the inner steel ring light and easy to carry.
[0010] An adjusting screw adapted to the threaded hole is arranged at the lower end of the column. By rotating the adjusting screw forward along the threaded hole, the overall height of the column and the adjusting screw can be adjusted higher. By reversing the adjusting screw backward, the overall height of the column and the adjusting screw can be adjusted lower, so that the height of the outer arc plate can be adaptively changed so that it can always face the jaws of three-jaw chucks of different sizes.
[0011] An annular bushing is fixed on the outer side of the inner steel ring. The bushing can be made of polyurethane foam. The bushing and the bearing ring are interference fit. The soft material can fit the inner circular surface of the bearing ring and will not cause scratches after clamping.
[0012] The length of the frosted films is greater than that of the outer arc plate, and there is a spacing between adjacent frosted films. The two ends of the frosted films can block the edges of the corresponding outer arc plate to prevent these protruding edges from damaging the grinding surface of the bearing ring.
[0013] The technical effects achieved by this utility model are:
[0014] The present invention discloses a bearing ring polishing device for producing bearings. During processing, the protective door of the machine is opened, the three-jaw chuck is fixed to the working table of the machine, the column is inserted into the middle of the three-jaw chuck downward until it abuts against the upper surface of the working table of the machine, so that the outer arc plate faces each clamping jaw of the three-jaw chuck. At this time, a bearing ring is sleeved on the outside of the inner steel ring, and then the three-jaw chuck is tightened with a wrench. The clamping jaws of the three-jaw chuck gradually bite each outer arc plate, and the outer arc plates all move toward the middle of the inner steel ring and thereby press the bearing ring. The arc surface of the outer arc plate just sticks to the outer cylindrical surface of the bearing ring for clamping, so that the clamping jaws of the three-jaw chuck avoid direct contact with the bearing ring and increase the clamping area. In this way, the grinding tool of the machine is used to perform a polishing, and finally the bearing ring is clamped in reverse, the first polishing surface is clamped, and unnecessary indentations on the polishing surface of the bearing ring are reduced. After the second polishing, it can be removed, and the above steps are repeated to perform batch polishing of the bearing rings. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a front view of the practical bearing ring polishing device;
[0016] Figure 2 It is the front view of the practical three-jaw chuck;
[0017] Figure 3 It is a cross-sectional view of the inner steel ring of the present invention;
[0018] Figure 4 This is the front view of the outer curved plate of the utility model;
[0019] Figure 5 It is a bottom view of the practical annular table.
[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0021] 1. Machine table; 2. Three-jaw chuck; 3. Column; 4. Inner steel ring; 5. Outer arc plate; 6. Frosted film; 7. Ring table; 8. Slide groove; 9. Threaded hole; 10. Adjusting screw; 11. Bushing. DETAILED DESCRIPTION
[0022] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with the embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the scope of protection specifically requested by the present invention.
[0023] like Figure 1-5 As shown, a bearing ring polishing device for producing bearings comprises a machine table 1 and a three-jaw chuck 2 installed inside the machine table 1. The machine table 1 may select a machining center of the FNC series. A column 3 and an inner steel ring 4 are sequentially arranged in the middle of the three-jaw chuck 2 from bottom to top. The central axis of the inner steel ring 4 coincides with the central axis of the column 3. A sliding mechanism is arranged at the lower edge of the inner steel ring 4. A plurality of outer arc plates 5 are distributed in a circular array on the outside of the inner steel ring 4. The middle of the outer side of the outer arc plates 5 are respectively opposite to the clamping jaws of the three-jaw chuck 2. The outer arc plates 5 are all slidably connected with the sliding mechanism. A frosted film 6 is fixed on one side of the outer arc plates 5 close to the inner steel ring 4. After the bearing rings are heat treated, they are transported in batches to the processing area next to the machine table 1 by a trolley. During processing, the protective door of the machine table 1 is opened and the three-jaw chuck 2 is fixed to the working surface of the machine table 1. On the platform, the column 3 is inserted downward in the middle of the three-jaw chuck 2 until it rests against the upper surface of the workbench of the machine table 1, so that the outer arc plate 5 is opposite to the various jaws of the three-jaw chuck 2. At this time, a bearing ring is put on the outside of the inner steel ring 4, and then the three-jaw chuck 2 is tightened with a wrench. The jaws of the three-jaw chuck 2 gradually bite each outer arc plate 5, and the outer arc plates 5 all move toward the middle of the inner steel ring 4 and thereby press the bearing ring. The arc surface of the outer arc plate 5 just sticks to the outer cylindrical surface of the bearing ring for clamping, avoiding the direct contact of the jaws of the three-jaw chuck 2 with the bearing ring and increasing the clamping area. In this way, the grinding tool of the machine table 1 is used for polishing once, and finally the bearing ring is clamped in reverse, and the primary polishing surface is clamped to reduce unnecessary indentations on the polishing surface of the bearing ring. It can be removed after the second polishing, and the above steps are repeated for batch polishing of the bearing ring.
[0024] When the machine 1 polishes the bearing ring, cutting fluid is continuously sprayed toward the center of the three-jaw chuck 2 to cool it down and wash away the impurities ground off.
[0025] like Figure 3 , Figure 4 and Figure 5 As shown, the sliding mechanism includes an annular platform 7 fixed on the lower edge of the inner steel ring 4, and a plurality of slide grooves 8 are distributed along the circumferential array on the lower surface of the annular platform 7. The slide grooves 8 are all slidably connected with the adjacent outer arc plates 5. The annular platform 7 is outside the inner steel ring 4 and is used to support the bearing ring, so that at least one-half of the bearing ring is higher than the inner steel ring 4, so that the two grinding ranges can cover the entire outer surface of the bearing ring, and the slide grooves 8 are used to limit the outer arc plate 5, so that the outer arc plate 5 can only move radially along the inner steel ring 4, so as to face the bearing ring.
[0026] like Figure 1 , Figure 2 and Figure 3 As shown, a threaded hole 9 is opened axially on the lower surface of the column 3 to reduce the weight of the column 3 and make the column 3 and the inner steel ring 4 light and easy to carry.
[0027] like Figure 1, Figure 2 and Figure 3 As shown, an adjusting screw 10 adapted to the threaded hole 9 is provided at the lower end of the column 3. By rotating the adjusting screw 10 along the threaded hole 9 forward, the overall height of the column 3 and the adjusting screw 10 can be adjusted higher. By reversing the adjusting screw 10, the overall height of the column 3 and the adjusting screw 10 can be adjusted lower, so that the height of the outer arc plate 5 can be adaptively changed so that it can always face the jaws of the three-jaw chuck 2 of different sizes.
[0028] like Figure 2 and Figure 3 As shown, an annular bushing 11 is fixed to the outside of the inner steel ring 4. The bushing 11 can be made of polyurethane foam. The bushing 11 and the bearing ring have an interference fit. The soft material can fit the inner circular surface of the bearing ring and will not cause scratches after clamping.
[0029] like Figure 1 , Figure 3 and Figure 5 As shown, the length of the frosted film 6 is greater than the length of the outer arc plate 5, and there is a spacing between adjacent frosted films 6. The two ends of the frosted film 6 can block the edges of the corresponding outer arc plate 5 to prevent these edges from protruding and damaging the grinding surface of the bearing ring, and they will not hinder each other after being close to the bearing ring.
[0030] The working principle of the utility model is as follows: during processing, the protective door of the machine table 1 is opened, the three-jaw chuck 2 is fixed to the working table of the machine table 1, and the column 3 is inserted downward in the middle of the three-jaw chuck 2 until it is against the upper surface of the working table of the machine table 1, so that the outer arc plate 5 is opposite to each clamping jaw of the three-jaw chuck 2. At this time, a bearing ring is sleeved on the outside of the inner steel ring 4, and then the three-jaw chuck 2 is tightened with a wrench. The clamping jaws of the three-jaw chuck 2 gradually bite each outer arc plate 5, and the outer arc plate 5 moves toward the middle of the inner steel ring 4 and thereby presses the bearing ring. The arc surface of the outer arc plate 5 just sticks to the outer cylindrical surface of the bearing ring for clamping, avoiding the clamping jaws of the three-jaw chuck 2 from directly contacting the bearing ring and increasing the clamping area. In this way, the grinding tool of the machine table 1 is used for polishing once, and finally the bearing ring is clamped in the opposite direction, and the first polishing surface is clamped to reduce unnecessary indentations on the polishing surface of the bearing ring. It can be removed after the second polishing, and the above steps are repeated for batch polishing of the bearing ring.
[0031] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.
Claims
1. A bearing ring polishing device for producing bearings, comprising a machine platform (1) and a three-jaw chuck (2) installed inside the machine platform (1), characterized in that: A column (3) and an inner steel ring (4) are sequentially arranged in the middle of the three-jaw chuck (2) from bottom to top, the central axis of the inner steel ring (4) coincides with the central axis of the column (3), a sliding mechanism is arranged at the lower edge of the inner steel ring (4), a plurality of outer arc plates (5) are distributed along a circumferential array on the outside of the inner steel ring (4), the middle of the outer side of the outer arc plates (5) are respectively opposite to the clamping jaws of the three-jaw chuck (2), the outer arc plates (5) are slidably connected to the sliding mechanism, and a frosted film (6) is fixed on one side of the outer arc plates (5) close to the inner steel ring (4).
2. A bearing ring polishing device for producing bearings according to claim 1, characterized in that: The sliding mechanism comprises an annular platform (7) fixed on the lower edge of the inner steel ring (4), and a plurality of sliding grooves (8) are distributed in a circumferential array on the lower surface of the annular platform (7), and the sliding grooves (8) are all slidably connected to adjacent outer arc-shaped plates (5).
3. A bearing ring polishing device for producing bearings according to claim 1, characterized in that: A threaded hole (9) is axially provided on the lower surface of the column (3).
4. A bearing ring polishing device for producing bearings according to claim 3, characterized in that: The lower end of the column (3) is provided with an adjusting screw (10) adapted to the threaded hole (9).
5. A bearing ring polishing device for producing bearings according to claim 1, characterized in that: An annular bushing (11) is fixed on the outer side of the inner steel ring (4).
6. A bearing ring polishing device for producing bearings according to claim 1, characterized in that: The length of the frosted films (6) is greater than the length of the outer arc-shaped plate (5), and there is a spacing between adjacent frosted films (6).