Tool clamp for grinding bearing
By designing a tooling fixture for bearing grinding, the problems of jamming and positional displacement caused by thermal expansion and contraction of bearings were solved, achieving high-precision grinding and improving the stability and yield of glass production lines.
Patent Information
- Application Number
- CN202423216346.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-25
AI Technical Summary
In the glass production process, bearing jamming and misalignment caused by thermal expansion and contraction affect the stable operation of the production line and the yield rate, which is difficult to solve effectively with existing technology.
Design a tooling fixture for bearing grinding, made of 45# steel, with a cylindrical structure and concentrically arranged grooves and bosses, and a diamond grinding head to ensure the stability and precision of the bearing during the grinding process.
By using tooling fixtures, high-precision grinding of bearings was achieved, reducing positional shifts and grinding errors caused by thermal expansion and contraction, improving the fit between bearings and traction rollers, and ensuring the stability and yield of the production line.
Smart Images
Figure CN223776881U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to glass production and processing technical field, concretely relates to a bearing grinding's frock clamp. BACKGROUND
[0002] The market demand prospect of liquid crystal glass and cover plate glass is more and more broad, and the production demand is big, and the traction roller and bearing are the main components of the production line of liquid crystal glass and cover plate glass.Under the working condition of continuous high temperature, the roller core of traction roller is easy to expand and contract with heat, and the boss of roll shaft appears crack and is scrapped;Traction roller is extruded bearing due to thermal expansion, and bearing also appears expansion, deviation, if the matching position is improper, traction roller and bearing appear jam, cannot normally run, even traction roller and bearing appear expansion crack, distortion damage, seriously affect the yield of base plate glass in the production line of traction roller.
[0003] In the forming process, a short roller mechanism of a G8.5 generation substrate glass production line needs to use multiple bearings, and the running cycle of the production line is basically 4-5 years, and during the period, the short roller may need to be replaced due to various reasons.Only by ensuring that the size of the processed bearing is appropriate and the interchangeability is good, can the replacement demand of the production line be met. Therefore, improving the machining precision and quality of the bearing has a crucial significance for maintaining the stable and efficient operation of the production line.
[0004] How to solve the bearing jam caused by the expansion of the shaft core has become the first problem we need to solve. Because the size of the traction roller shaft core is long, if the traction roller shaft core is turned by external circle, the length-diameter ratio exceeds 1:20, and the surface of the shaft core is covered with a layer of asbestos, so the same coaxiality of the bearing position at the both ends of the shaft core cannot be guaranteed, and the machining precision cannot meet the use requirements, so it is not easy to directly process the shaft core. When this situation occurs previously, the traction roller is removed, and the file, mixed file and sandpaper are used to polish and polish the bearing installation position at both ends of the No. 1 asbestos traction roller shaft core in batches, and then the lubricant is sprayed. Although the bearing jam phenomenon can be relieved in a short time, this problem has not been effectively solved. UTILITY MODEL CONTENTS
[0005] To solve the existing problems, the utility model provides a bearing grinding frock clamp with reasonable design and good effect, which provides a frock clamp scheme with simple structure, controllable cost and convenient installation for glass production line.
[0006] In order to achieve the above purpose, the utility model provides the following technical scheme.
[0007] The utility model provides a bearing grinding tool fixture, including a fixture body, the recess for placing bearing is arranged in the fixture body, the bottom of the recess is provided with through -hole along the recess depth direction for draining cooling liquid and grinding dust, a plane is formed between the groove width and the hole diameter in the recess bottom, a boss is arranged on the bottom plane of the recess for limiting the inner ring of bearing.
[0008] As a further improvement of the utility model, the fixture body is cylindrical.
[0009] As a further improvement of the utility model, the recess is cylindrical.
[0010] As a further improvement of the utility model, the recess is concentrically arranged with the cylindrical shaft of the fixture body.
[0011] As a further improvement of the utility model, the boss is annular.
[0012] As a further improvement of the utility model, the boss is annular.
[0013] As a further improvement of the utility model, the boss is concentrically arranged with the cylindrical shaft of the fixture body.
[0014] As a further improvement of the utility model, the fixture body adopts 45# steel.
[0015] As a further improvement of the utility model, the bottom plane of the recess is parallel with an end face of the fixture body.
[0016] As a further improvement of the utility model, the surface roughness of the recess is less than 0.05mm.
[0017] The utility model has the following beneficial effects:
[0018] The recess of the fixture body is used for placing bearing and locking the outer ring of bearing, the boss is arranged at the bottom of the recess and is used for slightly lifting the inner ring of bearing, forms the height difference of the inner and outer rings of bearing, and the rotation of diamond grinding head is facilitated, the through -hole is arranged in the recess, can reduce the heat absorption quality of the fixture body, also is convenient for cooling in the grinding process, and the cooling liquid and bearing grinding dust are discharged from the through -hole.
[0019] The cylindrical clamp body is convenient for processing and installation, and can provide uniform supporting force, ensuring the stability of the bearing during grinding. The cylindrical groove matches the shape of the bearing, which can better fix the bearing and prevent displacement of the bearing during grinding. The cylindrical shape also ensures uniform heat conduction during grinding. The concentric arrangement ensures the accurate position of the bearing in the groove, avoiding grinding errors caused by positional deviation; during the operation of the traction roller, it reduces stress concentration, deviation and warping caused by expansion due to high temperature. The concentrically arranged boss can ensure uniform stress on the bearing during grinding, avoiding grinding errors caused by uneven stress.
[0020] Preferably, the 45# steel has good strength and toughness, which can meet the requirements of hardness and wear resistance of the tool clamp during use.
[0021] Preferably, the surface roughness of the groove is less than 0.05mm, and the low surface roughness of the groove can reduce the friction between the bearing, facilitate placement and removal, protect the bearing surface from damage, and improve grinding accuracy and efficiency.
[0022] In summary, the utility model effectively prevents the positioning error and improper assembly tendency of the bearing and the traction roller during assembly; and the tool clamp is used to assemble the bearing, which can complete the processing and handling procedures of positioning and clamping on both sides of the bearing at one time, and through one-time clamping, the coaxiality between the hole positions is ensured, the assembly precision and quality are improved, and the yield of the liquid crystal substrate glass is improved. BRIEF DESCRIPTION OF DRAWINGS
[0023] The drawings described herein are for illustrative purposes only and do not limit the scope of the utility model disclosure in any way. In addition, the shape and scale of each component in the drawings are only schematic and are used to help understand the utility model, and are not specific limitations on the shape and scale of each component of the utility model. In the drawings:
[0024] Figure 1 A top view schematic diagram of a tool clamp for bearing grinding described in embodiment 1;
[0025] Figure 2 A front view schematic diagram of a tool clamp for bearing grinding described in embodiment 1;
[0026] Figure 3 A three-dimensional schematic diagram of the utility model.
[0027] Among them, 1. clamp body, 2. groove, 3. boss, 4. through hole. DETAILED DESCRIPTION
[0028] In order to make the technical scheme in the present application better understood, the technical scheme in the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts should belong to the scope of protection of the present application.
[0029] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be intervening elements. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein only for the purpose of describing specific embodiments and is not intended to limit the present application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0031] Embodiments
[0032] The bearing corresponding to the tooling fixture in the embodiment has a model of 6208z, an outer diameter of 80mm, an inner diameter of 40.02mm, and a bearing width of 18mm.
[0033] As shown in Figure 1 The present embodiment provides a tooling fixture for bearing grinding, which comprises a pair of fixture bodies 1. A recess 2 is arranged in the fixture body 1 for placing a bearing. A through hole 4 is arranged in the recess 2 along the depth direction of the recess 2. The hole diameter of the through hole 4 is smaller than the groove width of the recess 2. A flat surface is formed between the groove width and the hole diameter at the bottom of the recess 2. A boss 3 is arranged on the flat surface at the bottom of the recess 2 for lifting the inner ring of the bearing to form a height difference with the outer ring.
[0034] The fixture body 1 is made of 45# steel. The 45# steel has good strength and toughness, which can meet the requirements of hardness and wear resistance of the tooling fixture in the use process.
[0035] As shown in Figure 2 and 3As shown, the clamp body 1 is a cylinder with a diameter of 150 mm and a thickness of 50 mm. The groove 2 is a cylindrical slot with a diameter of 80.04 mm and a depth of 18 mm, which is adapted to the width of the bearing. A circular boss 3 with a thickness of 1 mm, an inner diameter of 41 mm and an outer diameter of 61 mm is machined on the bottom plane of the groove 2, which facilitates the positioning and fastening of the bearing; the thickness of the boss should not be too high to prevent the inner ring from being stressed too much and causing damage to the bearing. The groove 2 is concentrically arranged with the cylindrical shaft of the clamp body 1. The boss is concentrically arranged with the cylindrical shaft of the clamp body 1. These concentric designs facilitate the concentric positioning during the grinding process. The clamp body 1 is cylindrical, which facilitates machining and installation, while providing uniform support force to ensure the stability of the bearing during the grinding process. The cylindrical shape also ensures uniform heat conduction during the grinding process. The cylindrical groove 2 matches the shape of the bearing, which can better fix the bearing and prevent displacement of the bearing during the grinding process. The concentric arrangement ensures the accurate position of the bearing in the groove 2, avoiding grinding errors caused by positional deviation; accurate grinding can reduce stress concentration, displacement and warping caused by bearing expansion during the operation of the traction roller. The concentrically arranged boss can ensure accurate positioning and uniform stress of the bearing during the grinding process, avoiding grinding errors caused by uneven stress.
[0036] The bottom plane of the groove 2 is parallel to one end face of the clamp body 1, which facilitates positioning and clamping, and maintains uniform mechanical and thermal transmission; improves the efficiency of machining and the flatness of the formed surface, reduces tool wear and improves machining quality.
[0037] The through hole 4 is a circular hole with a diameter of 41 mm, which is provided at the bottom of the groove 2, which can reduce the heat absorption mass of the clamp body and facilitate cooling during the grinding process.
[0038] When using the tooling fixture of the present embodiment, the fixture is fixed on the workbench of the numerical control machine tool; the position of the fixture is ensured to be stable to facilitate subsequent bearing grinding operation. The bearing is placed horizontally on the circular boss 3 on the bottom surface of the groove 2 with a diameter of 80.04 mm; the design of the boss ensures the stability and accuracy of the bearing during the grinding process.
[0039] Two sets of pressing plate assemblies are then applied to fasten the bearing; the design of the pressing plate assembly should ensure that the bearing does not displace or deform due to uneven stress or heat during the grinding process. Finally, the center of the bearing inner hole is found by using a finder, which is crucial to ensure the accuracy of subsequent grinding processing.
[0040] In order to optimize the degree of cooperation between the bearing and the traction roller, the 160-φ35*R5-120# sintered diamond tool can be installed on the BT50 tool holder, and the diameter of the diamond grinding head is 32mm, which is adapted to the inner ring of the bearing and the groove 2 of the clamp; the tool has good wear resistance and hardness, and is suitable for high-precision grinding of the bearing. The tool is installed on the BT50 tool holder, which ensures the concentricity and stability of the tool and the spindle of the machine tool.
[0041] The machining step is 0.01mm, which is to ensure the stability and accuracy of the grinding process.
[0042] For the bearing with an outer diameter of 18mm, the grinding process is carried out in a spiral feed manner; the grinding process is carried out in a spiral feed manner. The spiral feed can gradually reduce the grinding force, and avoid damaging the bearing due to excessive force.
[0043] During the size processing, the inner diameter micrometer is used for size measurement; this can ensure the accuracy control during the processing, and avoid overcutting or undercutting.
[0044] After the single-sided processing reaches 0.05mm of cutting amount, a standard rod with the same size as the outer diameter and the expanded mandrel is used for plug cutting test to check whether the size is qualified, and the final single-sided cutting amount reaches 0.08mm, which is qualified; the single-sided cutting amount is about 1‰ of the bearing inner ring radius; this accuracy requirement ensures the good cooperation between the bearing and the traction roller, and improves the stability and yield of the production line.
[0045] The specific use principle is that the clamp body 1 is fixed horizontally on the operation table, and the groove 2 is upward; the bearing is embedded in the groove 2, and the inner ring is guaranteed to be on the boss 3; the bearing outer ring and part of the inner ring are pressed and fixed by using the pressing plate, so that the rotation of the bearing inner and outer rings during grinding is avoided; the inner ring of the bearing is polished to the required size by using the diamond grinding tool.
[0046] The technical problem solved by the utility model is the running jamming problem of No. 1 asbestos traction roller used in the G8.5 generation liquid crystal glass production line. Since the shaft core and the bearing are used together, if a tool clamp is designed to expand the hole of the inner ring diameter of the bearing and increase the cooperation space of the traction roller and the bearing, the running jamming phenomenon of the traction roller can be alleviated.
[0047] Considering the strength and rigidity of the bearing, ordinary tools cannot be used for milling processing, only sintered diamond tools can be used for processing; because the sintered diamond tool is plated, the 120# particle size belongs to finishing, and will not cause secondary processing scratches on the surface of the bearing inner ring.
[0048] A pair of 6208z bearings were machined on a numerical control machine tool, and then installed on the No. 1 asbestos traction roller. In the subsequent production and processing, the bearing jamming phenomenon was eliminated, and the good product rate of the substrate glass was improved. The design and manufacture of the fixture provide a strong guarantee for the consistency and interchangeability of the machining of 6208z bearings, and meet the needs of the normal operation of the production line.
[0049] By using the tooling fixture and the optimized grinding process described in this embodiment, high-precision grinding of the bearing can be achieved. This not only improves the fit between the bearing and the traction roller, but also ensures the stability and good product rate of the production line. At the same time, the tooling fixture and the processing technology also have certain universality and scalability, which can be applied to the grinding processing needs of bearings of different specifications and models.
[0050] The above embodiments are only one of the implementation methods that can realize the technical scheme of the present application, and the scope of protection claimed by the present application is not limited to the above embodiments, but also includes any changes, substitutions and other implementation methods that are easily thought of by those skilled in the art within the technical scope disclosed by the present application. Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A tooling fixture for bearing grinding, characterized by, It comprises a clamp body (1); A recess (2) is arranged in the clamp body (1) for placing a bearing; A through hole (4) is arranged on the bottom of the recess (2) along the depth direction of the recess (2) for discharging cooling liquid and grinding dust; a plane is formed between the groove width and the hole diameter on the bottom of the recess (2); A boss (3) is arranged on the bottom plane of the recess (2) for limiting the inner ring of the bearing.
2. A bearing grinding fixture according to claim 1, wherein, The clamp body (1) is cylindrical.
3. A bearing grinding fixture according to claim 2, wherein, The recess (2) is cylindrical.
4. A bearing grinding fixture according to claim 3, wherein, The recess (2) is arranged concentrically with the cylindrical shaft of the clamp body (1).
5. The bearing grinding fixture of claim 1, wherein, The boss (3) is annular.
6. The bearing grinding fixture of claim 1, wherein, The protruding height of the boss (3) is less than the depth of the recess (2).
7. A bearing grinding fixture according to claim 4 wherein, The boss (3) is arranged concentrically with the cylindrical shaft of the clamp body (1).
8. The bearing grinding fixture of claim 1, wherein, The clamp body (1) is made of 45# steel.
9. The bearing grinding fixture of claim 1, wherein, The bottom plane of the recess (2) is parallel to an end face of the clamp body (1).
10. The bearing grinding fixture of claim 1, wherein, The surface roughness of the recess (2) is less than 0.05 mm.