Polishing and grinding tool for narrow inner boss

Abstract

The utility model relates to the technical field of polishing and grinding tools, in particular to a polishing and grinding tool for a narrow inner boss, which comprises a cutter handle with a clamping area, and one end, far away from the clamping area, of the cutter handle is connected with a cutter head; the wool felt is connected with the tool bit; the fixing piece is arranged close to the knife handle, and the fixing piece is connected with the wool felt and the knife head and used for fixing the wool felt; the tool bit can be installed through the tool handle, the tool bit can conveniently stretch into an inner hole of a sleeve type workpiece, the wool felt can be conveniently installed and supported through the tool bit, the wool felt can be fixed through the fixing piece, and the possibility that the wool felt moves in the polishing process is reduced; and the surface polishing uniformity of the workpiece is improved, and the possibility that workers are injured is reduced.

Description

Technical Field

[0001] This application relates to the field of polishing tools, and in particular to a polishing tool for narrow internal bosses. Background Technology

[0002] Polishing is a processing method that uses mechanical, chemical, or electrochemical processes to reduce the surface roughness of a workpiece, thereby obtaining a bright and smooth surface. Polishing involves using polishing tools and abrasive particles or other polishing media to refine the surface of a workpiece. While reducing the surface roughness, it also improves the surface quality, such as reducing surface unevenness and removing residual surface stress.

[0003] During the rework of sleeve-type parts, based on the usage scenarios of these parts, it is necessary to process the surface roughness of the inner bosses to a high level. However, because the inner hole size of the sleeve-type parts is narrow and the parts themselves have already been machined, grinding or turning cannot be used. Therefore, polishing is used to meet the dimensional and surface roughness requirements. In the existing technology, the main polishing method for sleeve-type parts relies on workers to use polishing sandpaper to polish the inner bosses by inserting it into the inner hole. In order to provide polishing speed, the sleeve-type parts are usually given a certain rotation speed. The polishing sandpaper adjusts its position as the workpiece rotates to complete the polishing operation. However, during manual polishing, the worker's hand may touch the rotating workpiece and cause injury. Moreover, the worker's manual polishing force can also lead to uneven surface roughness of the workpiece, affecting the polishing effect of the sleeve-type parts. Utility Model Content

[0004] To improve the uniformity of workpiece surface polishing and reduce the possibility of worker injury, this application provides a polishing tool for narrow inner bosses.

[0005] The present application provides a polishing tool for narrow internal bosses, which adopts the following technical solution:

[0006] A polishing tool for narrow inner bosses, comprising

[0007] A tool holder having a clamping area, wherein a tool tip is connected to the end of the tool holder away from the clamping area;

[0008] Wool felt, the wool felt being connected to the cutter head;

[0009] A fixing member is provided near the handle and is connected to the wool felt and the blade head to fix the wool felt.

[0010] By adopting the above technical solution, the sleeve-type workpiece is first fixed by a three-jaw chuck, then the tool holder is fixed on the lathe tool post. The position of the tool holder is changed by adjusting the position of the lathe tool post. As the tool holder moves, the wool felt moves through the tool head until the wool felt contacts the inner boss of the sleeve-type workpiece to be polished. Then, the sleeve-type workpiece is rotated by the lathe to perform rough polishing. Then, the tool head is retracted by adjusting the lathe tool post, and polishing paste of the corresponding grit is applied to the wool felt for fine polishing. The polishing tool designed for narrow inner bosses can install the tool head through the tool holder, which facilitates the insertion of the tool head into the inner hole of the sleeve-type workpiece. The tool head facilitates the installation and support of the wool felt, and the fixing component can fix the wool felt, reducing the possibility of the wool felt moving during polishing, improving the uniformity of the workpiece surface polishing and reducing the possibility of worker injury.

[0011] In one specific implementation, the blade head is connected to two reinforcing ribs, the reinforcing ribs are connected to the blade handle, a receiving cavity is formed between the two reinforcing ribs, the wool felt is located in the receiving cavity and abuts against the reinforcing ribs, and the wool felt extends out of the receiving cavity.

[0012] By adopting the above technical solution, the designed reinforcing rib can form a cavity for accommodating wool felt, restrict the position of the wool felt, and improve the connection strength between the blade head and the handle.

[0013] In one specific implementation, the distance between the top wall of the reinforcing rib and the cutter head gradually decreases from the end away from the cutter handle.

[0014] By adopting the above technical solution, the design of the reinforcing ribs with gradually decreasing height can not only form a receiving cavity and enhance the stability of the cutter head structure, but also provide space for the wool felt, reducing the possibility of sleeve-type workpieces touching the reinforcing ribs.

[0015] In one specific implementation, the fastener includes a fixing nut, the threaded section of which passes through the felt and is threadedly connected to the cutter head.

[0016] By adopting the above technical solution, the designed fixing nut can fix the wool felt to the blade head.

[0017] In one specific implementation, when the screw section of the fixing nut is set horizontally, the cutter head is offset upward relative to the cutter shank.

[0018] By adopting the above technical solution, the offset cutting head designed can firstly make the polishing position of the wool felt equal to the height of the spindle rotation center of the machine tool, and secondly, it can also achieve misalignment between the tool holder and the cutting head, reducing the possibility of resonance between the tool holder and the sleeve-type workpiece, thereby reducing the impact of vibration caused by friction on the stability of the tool holder position during the polishing process.

[0019] In one specific implementation, the upward offset of the cutter head relative to the shank is set to 3 mm.

[0020] By adopting the above technical solution, the designed cutting head with an offset of 3 mm can ensure the connection strength between the cutting head and the shank while reducing resonance.

[0021] In one specific implementation, the material of the cutter head is set to polytetrafluoroethylene.

[0022] By adopting the above technical solution and designing the tool head as a polytetrafluoroethylene material, the impact of frictional heat on the tool head strength can be reduced during the polishing process, ensuring the consistency of polishing quality.

[0023] In one specific implementation, a reinforcing steel pad is provided between the wool felt and the blade.

[0024] By adopting the above technical solution, the designed reinforced steel pad can maintain the structural stability of the cutter head when the temperature rises.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. A polishing tool designed for narrow inner bosses is provided. The tool head can be installed through the tool holder, which facilitates the insertion of the tool head into the inner hole of sleeve-type workpieces. The tool head can be used to install and support wool felt, and the wool felt can be fixed by the fastener, reducing the possibility of the wool felt moving during the polishing process, improving the uniformity of the workpiece surface polishing and reducing the possibility of worker injury.

[0027] 2. The polishing tool designed for narrow inner bosses can form a receiving cavity for wool felt by means of reinforcing ribs, and can also restrict the position of the wool felt, and can also improve the connection strength between the cutter head and the handle.

[0028] 3. The designed polishing tool for narrow inner bosses, by offsetting the cutter head, firstly ensures that the polishing position of the felt is at the same height as the spindle rotation center of the machine tool, and secondly, it can also achieve misalignment between the tool holder and the cutter head, reducing the possibility of resonance between the tool holder and sleeve-type workpieces, thereby reducing the impact of vibration caused by friction on the stability of the tool holder position during the polishing process. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a polishing tool for a narrow inner boss according to an embodiment of this application.

[0030] Figure 2 Is Figure 1 A schematic diagram of the structure after adding reinforcing ribs to the original structure.

[0031] Figure 3 Is Figure 2 A schematic diagram of the structure after the cutter head is offset.

[0032] Figure 4 Is Figure 3 A schematic diagram of the structure after adding a reinforcing steel pad to the original structure.

[0033] Explanation of reference numerals in the attached diagram: 1. Handle; 2. Blade head; 3. Wool felt; 4. Fixing component; 41. Fixing nut; 5. Reinforcing rib plate; 6. Reinforcing steel pad. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0035] This application discloses a polishing tool for narrow internal bosses.

[0036] Example 1

[0037] Reference Figure 1 A polishing tool for narrow inner bosses includes a tool holder 1, a tool head 2, a felt 3, and a fixing member 4. The tool head 2 is connected to one end of the tool holder 1, and the end of the tool holder 1 away from the tool head 2 has a clamping area. In this application, the tool holder 1 can be elongated or other shapes, as long as it can be easily clamped and fixed by a lathe tool post. The felt 3 is connected to the tool head 2. The fixing member 4 is located close to the tool holder 1 and is connected to the felt 3 and the tool head 2 for fixing the felt 3. The tool head 2 can be installed through the tool holder 1, and it is easy for the tool head 2 to extend into the inner hole of the sleeve-type workpiece. The tool head 2 can be easily installed and supported by the felt 3. The fixing member 4 can fix the felt 3, reduce the possibility of the felt 3 moving during the polishing process, improve the uniformity of the workpiece surface polishing, and reduce the possibility of worker injury.

[0038] Example 2

[0039] Reference Figure 2Based on Example 1, this embodiment further includes two reinforcing ribs 5 to improve the structural strength of the cutter head 2 and the handle 1 and to restrict the position of the wool felt 3. Both reinforcing ribs 5 are integrally connected to the cutter head 2 and connected to the handle 1. A receiving cavity is formed between the two reinforcing ribs 5, and the wool felt 3 is located in the receiving cavity and abuts against the reinforcing ribs 5. In order to achieve polishing of sleeve-type workpieces, the wool felt 3 is set to extend out of the receiving cavity on the side away from the cutter head 2.

[0040] Reference Figure 2 Furthermore, the distance between the top wall of the reinforcing rib 5 and the cutter head 2 gradually decreases along the direction away from the end of the cutter shank 1. By using the reinforcing rib 5 with a gradually decreasing height, a receiving cavity can be formed and the structural stability of the cutter head 2 can be enhanced, while also providing space for the felt 3 and reducing the possibility of sleeve-type workpieces touching the reinforcing rib 5. In this application, the height of the reinforcing rib 5 can decrease linearly or non-linearly, such as the top wall of the reinforcing rib 5 being arc-shaped. In this embodiment, the decrease is preferably non-linear, and the top wall of the reinforcing rib 5 is arc-shaped.

[0041] Example 3

[0042] Reference Figure 2 Based on Embodiment 1 or Embodiment 2, this embodiment further discloses the structure of the fixing member 4. The fixing member 4 includes a fixing nut 41. The screw section of the fixing nut 41 passes through the wool felt 3 and is threadedly connected to the cutter head 2. The nut of the fixing nut 41 abuts against the side of the wool felt 3 away from the cutter head 2. The fixing nut 41 is located close to the handle 1.

[0043] Reference Figure 3 Furthermore, when the screw section of the fixing nut 41 is set horizontally, the cutter head 2 is offset upward relative to the tool holder 1. In this application, the upward offset of the cutter head 2 relative to the tool holder 1 can be one millimeter, two millimeters, or three millimeters. According to the mechanical simulation of the resonance generated by friction during use, the upward offset of the cutter head 2 relative to the tool holder 1 is preferably three millimeters. The offset cutter head 2 can firstly make the polishing position of the wool felt 3 equal to the height of the spindle rotation center of the machine tool, and secondly, it can also achieve the misalignment of the tool holder 1 and the cutter head 2, reducing the possibility of resonance between the tool holder 1 and the sleeve-type workpiece, thereby reducing the impact of vibration caused by friction on the positional stability of the tool holder 1 during the polishing process.

[0044] Example 4

[0045] Reference Figure 3Based on Example 1 or Example 2, in order to reduce the impact of heat generated by friction on the strength of the cutting head 2 during the polishing process and to ensure the consistency of polishing quality during the polishing process, the material of the cutting head 2 is polytetrafluoroethylene (PTFE). The material of the cutting head 1 can be metal or PTFE, as long as the material used has the characteristics of high temperature resistance and low coefficient of friction.

[0046] Reference Figure 4 Furthermore, since the heat generated by friction during the polishing process will be transferred to the cutter head 2, in order to maintain the structural stability of the cutter head 2, a reinforcing steel pad 6 is provided between the wool felt 3 and the cutter head 2, and the screw section of the fixing nut 41 passes through the reinforcing steel pad 6 and is threadedly connected to the cutter head 2.

[0047] The implementation principle of a polishing tool for narrow inner bosses according to an embodiment of this application is as follows: First, the sleeve-type workpiece is fixed by a three-jaw chuck. Then, the tool holder 1 is fixed on the lathe tool post. The position of the tool holder 1 is changed by adjusting the position of the lathe tool post. While the tool holder 1 moves, the felt 3 moves through the tool head 2 until the felt 3 contacts the inner boss surface of the sleeve-type workpiece to be polished. Then, the sleeve-type workpiece is rotated by the lathe to perform rough polishing. Then, the tool head 2 is retracted by adjusting the lathe tool post. Then, the corresponding grit polishing paste is applied to the felt 3 for fine polishing. The tool holder 1 can be used to install the tool head 2 and facilitates the insertion of the tool head 2 into the inner hole of the sleeve-type workpiece. The tool head 2 facilitates the installation and support of the felt 3. The fixing part 4 can fix the felt 3, reducing the possibility of the felt 3 moving during the polishing process, improving the uniformity of the workpiece surface polishing and reducing the possibility of worker injury.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A polishing tool for narrow inner bosses, characterized in that: include A knife handle (1) having a clamping area, wherein a knife head (2) is connected to one end of the knife handle (1) away from the clamping area; Wool felt (3), the wool felt (3) being connected to the blade head (2); A fixing member (4) is provided near the handle (1) and is connected to the wool felt (3) and the blade head (2) for fixing the wool felt (3).

2. The polishing tool for narrow inner bosses according to claim 1, characterized in that: Two reinforcing ribs (5) are connected to the blade head (2). The reinforcing ribs (5) are connected to the blade handle (1). A receiving cavity is formed between the two reinforcing ribs (5). The wool felt (3) is located in the receiving cavity and abuts against the reinforcing ribs (5). The wool felt (3) extends out of the receiving cavity.

3. The polishing tool for narrow inner bosses according to claim 2, characterized in that: The distance between the top wall of the reinforcing rib (5) and the cutter head (2) gradually decreases from the end away from the cutter handle (1).

4. The polishing tool for narrow inner bosses according to any one of claims 1-3, characterized in that: The fastener (4) includes a fixing nut (41), the screw section of which passes through the wool felt (3) and is threadedly connected to the cutter head (2).

5. The polishing tool for narrow inner bosses according to claim 4, characterized in that: When the screw section of the fixing nut (41) is set horizontally, the cutter head (2) is offset upward relative to the cutter handle (1).

6. The polishing tool for narrow inner bosses according to claim 5, characterized in that: The upward offset of the cutter head (2) relative to the handle (1) is set to 3 mm.

7. The polishing tool for narrow inner bosses according to any one of claims 1-3, characterized in that: The material of the cutter head (2) is polytetrafluoroethylene.

8. The polishing tool for narrow inner bosses according to claim 7, characterized in that: A reinforcing steel pad (6) is provided between the wool felt (3) and the blade (2).

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