Profiling polishing tool
By designing a contour grinding fixture and utilizing a combination of a fixing plate and positioning screws, efficient contour grinding of large gear racks was achieved, solving the problem of unsatisfactory results from manual grinding in existing technologies and improving grinding and polishing effects and efficiency.
Patent Information
- Application Number
- CN202423222379.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-26
AI Technical Summary
The lack of efficient contour grinding equipment suitable for large gears and racks in the current technology leads to unsatisfactory results in manual grinding, especially when the area of the welded filling part is large, it is difficult to achieve matching with the original surface shape and roughness.
A contour grinding fixture was designed. By setting multiple threaded through holes and positioning screws on the fixed plate and using it in conjunction with an angle grinder, the working surface of the wheel is kept tangent or parallel to the surface being ground, thus achieving the contour grinding effect.
It simplifies the grinding process, improves the grinding and polishing effect and efficiency, makes the ground surface closer to the original surface, and reduces the difficulty and cost of operation.
Smart Images
Figure CN223557423U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of profiling device, more particularly to a profiling polishing tool. BACKGROUND
[0002] In large-scale ship lift, offshore platform and other super large equipment, large gear rack or giant gear rack is usually used. Because of the large mass and volume of these gear racks, the safety margin in design is high, so tooth breakage phenomenon does not generally occur. However, these gears are still prone to failure after long-term use. Common failure conditions include surface defects such as pitting and adhesive damage. These gear failures can seriously affect the accuracy and transmission efficiency of the transmission system, as well as the carrying capacity, thereby affecting equipment operation, production safety and economic benefits. Therefore, when these gears have surface defects, welding repair is usually required to extend their service life.
[0003] For large-scale ship lift, offshore platform and other super large equipment, due to the particularity of the operating environment, the large gear rack or giant gear rack is difficult to disassemble, and the cost of disassembly and reinstallation is extremely high. Therefore, the most economical method is to eliminate surface defects through online repair. The last step of online repair is usually to polish the welded filler part to make the surface shape and roughness of the welded filler part closer to the original surface of the gear, without damaging the surrounding unrepaired tooth surface, i.e. to achieve profiling polishing. This is beneficial to restoring the accuracy and transmission efficiency of the transmission system, as well as the carrying capacity, and can avoid the occurrence of surface defects in the same position again. However, there is no large-scale polishing equipment for these gears in the existing technology, and it is not economical to manufacture large-scale polishing equipment for these gears. Due to the limitations of gear shape and space between teeth, small-scale polishing equipment cannot be used to polish these gears. Therefore, the polishing of repaired gears is currently mainly done manually using an angle grinder. Manual operation requires operators to have high polishing skills and is subject to subjective factors. Therefore, the effect of profiling polishing at this stage is not ideal. In summary, there is no good way to profile polish repaired gears, especially when the area of the welded filler part is large, making it more difficult to achieve profiling polishing. SUMMARY
[0004] The utility model discloses a profiling polishing tool to overcome the deficiencies in the prior art. The utility model discloses the following technical solutions to achieve the above-mentioned purposes.
[0005] The profiling grinding tool comprises a fixed plate, a center through hole is arranged on the fixed plate, at least four threaded holes are arranged around the center through hole on the fixed plate, the distance between any threaded hole and the center through hole is greater than the sum of the radius of the wheel piece installed on the angle grinder and the radius of the threaded hole, and a positioning screw is threadedly connected in each threaded hole.
[0006] The center through hole in the scheme is mainly used for the coaxial passing of the output shaft or the coaxial sheath of the output shaft and other parts of the angle grinder. The fixed plate in the scheme is connected to the shell at the output shaft of the angle grinder, for example, some angle grinders are provided with screw holes on the shell at the output shaft, a through hole is opened on the fixed plate at the corresponding position, then a screw is locked to the screw hole through the through hole, or the fixed plate is tightly pressed by the grinding wheel cover of the angle grinder, or the fixed plate is directly connected to the grinding wheel cover. Then the wheel piece is installed on the angle grinder, and finally the positioning screw is adjusted. The requirement for adjusting the positioning screw is that when the end faces of all the positioning screws are in contact with the surface to be ground, the working surface of the wheel piece is tangent to or parallel to the surface to be ground, that is, the grinding or polishing effect is a profiling effect, and then the angle grinder is moved back and forth in a fixed direction. When the angle grinder is moved back and forth, it is ensured that the end faces of the positioning screws are always in contact with the surface to be ground, so that the working surface of the wheel piece and the surface to be ground always remain tangent or parallel. The scheme is usually used in surface repair, for example, after the tooth surface is welded and repaired, the welded part needs to form the same shape and roughness as the original surface of the tooth surface, at which time the welded part needs to be profiled and polished. All threaded holes in the scheme are arranged around the center through hole, that is, all positioning screws are arranged around the center through hole, that is, all positioning screws are not on the same straight line. After adjusting the distance between the end faces of all the positioning screws and the fixed plate, when the end faces of all the positioning screws are in contact with the surface to be ground, the relative relationship between the working surface of the wheel piece and the surface to be ground remains stable. For a straight gear, as long as it is moved linearly along the tooth width direction, the relative relationship between the working surface of the wheel piece and the surface to be ground remains in a stable and consistent state, thereby achieving the profiling effect. The scheme combines the advantages of manual grinding and mechanical grinding, and the grinding personnel only need to adjust the distance between the end faces of the positioning screws and the fixed plate, and then move the angle grinder back and forth linearly. According to the different radial positions of the welded part, the positioning screws are adjusted again and then the angle grinder is moved back and forth for grinding and polishing. The use of the profiling grinding tool of the scheme can greatly simplify the grinding and polishing operation, reduce the difficulty of profiling grinding and polishing, greatly improve the grinding and polishing effect and efficiency, and make the surface after grinding and polishing closer to the original surface.
[0007] As a further improved structure, a nut is threadedly connected to the positioning screw. This structure can avoid accidental loosening and axial displacement of the adjusted positioning screw, and further ensure the profiling effect of grinding and polishing.
[0008] As a further improved structure, the plate surface of the fixing plate is rectangular, the number of the threaded through holes is even, all the threaded through holes are evenly divided into two groups, the threaded through holes in each group are arranged along a straight line, the arrangement direction is parallel to the long side direction or the short side direction of the plate surface, and the two groups of threaded through holes are symmetrically arranged relative to the axis of the central through hole. This structure can conveniently adjust the positioning screw. After the distance from the end of a positioning screw to the plate surface is determined, the distances of the other positioning screws in the same group as the positioning screw are adjusted to be the same.
[0009] As a further improved structure, the fixing plate is provided with a mounting sheath for connecting the housing at the output shaft of the angle grinder. The angle grinder is provided with a grinding wheel cover with a connecting sleeve. The mounting sheath in this structure can be similar to the connecting sleeve of the grinding wheel cover, so that the mounting and dismounting of the fixing plate are facilitated, and the grinding wheel cover is not needed.
[0010] Compared with the prior art, the utility model has the advantages that the utility model combines the advantages of manual polishing and mechanical polishing, the profiling polishing tool of the utility model can greatly simplify polishing and polishing operation, reduce profiling polishing difficulty, greatly improve polishing and polishing effect and polishing and polishing efficiency, and make the surface after polishing and polishing closer to the original surface. In addition, the utility model has simple structure, low cost and convenient installation and dismounting. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the profiling polishing tool in the utility model embodiment.
[0012] Figure 2 It is a partial schematic diagram of the profiling polishing tool in the utility model embodiment in the state of polishing a gear after being mounted on an angle grinder, in the gear axial direction.
[0013] Figure 3 It is a partial schematic diagram of the profiling polishing tool in the utility model embodiment in the state of polishing a gear after being mounted on an angle grinder, in the normal direction of a certain point on the gear surface. The arrow direction in the diagram is the direction of reciprocating movement of the angle grinder, i.e. the tooth width direction of the gear. IMPLEMENTATION
[0014] The utility model will be further described below in combination with the drawings. The drawings are only used for exemplary description, and cannot be understood as a limitation on the patent. In order to more simply describe the embodiment, some components which are well known to those skilled in the art but are not related to the main content of the utility model will be omitted in the drawings or the description. In addition, some components will be omitted, enlarged or reduced in the drawings for the convenience of description, but do not represent the size or the whole structure of the actual product.
[0015] Embodiment, such as Figure 1 , Figure 2 andFigure 3 As shown, the embodiment introduces a profiling polishing tool, which comprises a fixed plate 1. The plate surface of the fixed plate 1 is rectangular. A central through hole is arranged at the center of the fixed plate 1, and the axis of the central through hole is perpendicular to the plate surface. The central through hole is mainly used for the coaxial passing of the output shaft of the angle grinder or the coaxial sleeve of the output shaft. According to the different installation modes, the diameter of the central through hole can be appropriately enlarged. The fixed plate 1 of the embodiment is directly locked and connected to the grinding wheel cover of the angle grinder by screws, and the connecting sleeve of the grinding wheel cover passes through the central through hole. In other embodiments, the fixed plate can be provided with an installation sleeve similar to the connecting sleeve of the grinding wheel cover. In this way, without the need to install the grinding wheel cover, the fixed plate can be directly connected to the shell at the output shaft of the angle grinder by using the installation sleeve.
[0016] Eight threaded holes are arranged around the central through hole on the fixed plate 1, and the axes of all the threaded holes are perpendicular to the plate surface. The distance between any threaded hole and the central through hole is greater than the sum of the radius of the wheel piece installed on the angle grinder and the radius of the threaded hole, and is also greater than the maximum radius of the grinding wheel cover. Each threaded hole is threadedly fitted with a positioning screw 2. The above-mentioned distance requirement is to ensure that the positioning screw 2 does not contact the wheel piece and the grinding wheel cover. A nut 3 is threadedly fitted on each positioning screw 2, which can be locked after the position of the positioning screw 2 is adjusted, so as to avoid accidental loosening and axial displacement of the positioning screw 2.
[0017] In the embodiment, the eight threaded holes are evenly divided into two groups, and the four threaded holes in each group are arranged in a straight line along the short edge direction of the plate surface, and the two groups of threaded holes are symmetrically arranged with respect to the axis of the central through hole. In this way, the adjustment of the positioning screw 2 can be facilitated. After the distance from the end of a positioning screw 2 to the plate surface is determined, the distance adjustment of the other positioning screws 2 in the same group as the positioning screw 2 can be the same.
[0018] Figure 2 And Figure 3is a schematic view of installing the profiling polishing tool of the embodiment on an angle grinder for profiling polishing a gear. First, the abrasive wheel cover of the angle grinder is removed, the fixing plate 1 is connected to the abrasive wheel cover by screws, then the abrasive wheel cover is installed back to the angle grinder, then the wheel piece is installed to the angle grinder, finally the positioning screw 2 is adjusted. The requirement of adjusting the positioning screw 2 is that when the end faces of all the positioning screws 2 are in contact with the surface to be polished, the working surface of the wheel piece is tangent to the surface to be polished, if the surface to be polished is a plane, the working surface of the wheel piece is parallel to the surface to be polished, that is, the polishing effect is a profiling effect, then the nut 3 is tightened. Then the angle grinder is reciprocated along the tooth width direction of the gear, and when the angle grinder is reciprocated, the end faces of the positioning screws 2 are ensured to be in contact with the surface to be polished. According to the polishing height allowance of the polished area, the distance between the end of the positioning screw 2 and the plate can be adjusted appropriately or multiple times, which is similar to adjusting the grinding feed amount. By using the profiling polishing tool of the embodiment, the polishing effect and the polishing efficiency can be greatly improved, and the surface after polishing is closer to the original surface.
[0019] The above is only one specific embodiment of the utility model, but the design concept of the utility model is not limited to this, and any non-essential modification made to the utility model by using the design concept of the utility model falls within the protection scope of the utility model.
Claims
1. A contour grinding fixture, characterized in that, Includes a fixing plate with a central through hole. At least four threaded through holes are arranged around the central through hole on the fixing plate. The distance between any threaded through hole and the central through hole is greater than the sum of the radius of the wheel plate installed on the angle grinder and the radius of the threaded through hole. Each threaded through hole is threaded with a positioning screw.
2. The contour grinding fixture according to claim 1, characterized in that, The positioning screw is threaded with a nut.
3. The contour grinding fixture according to claim 1, characterized in that, The fixed plate has a rectangular surface and an even number of threaded through holes. All threaded through holes are divided into two groups. Each group of threaded through holes is arranged in a straight line, with the arrangement direction parallel to the long side or short side of the plate surface. The two groups of threaded through holes are symmetrically arranged with respect to the axis of the central through hole.
4. The contour grinding fixture according to claim 1, characterized in that, The mounting plate is provided with a mounting sleeve for connecting the housing to the output shaft of the angle grinder.