A device for expanding grinding wheels for small machine tools

Abstract

This utility model relates to the technical field of machine tool processing auxiliary equipment, and discloses a device for expanding the grinding wheel of a small machine tool. It includes a reducer and a fixed lug mounted on one side of the reducer's outer wall. A motor is connected and installed on the other side of the reducer's outer wall. A drive pulley is connected to one output end of the reducer, and an annular sandpaper is rotatably mounted on the drive pulley. In a preferred embodiment, an adjusting rod is connected to one side of the drive connecting shaft's outer wall. An adjusting groove is formed on the outer wall of the adjusting rod, and a connecting support shaft is slidably mounted on the inner wall of the adjusting groove. This utility model does not make any modifications to the original machine tool, but fully utilizes the original machine tool's transmission and adjustment devices. By replacing the cutting tool with grinding sandpaper, it achieves the goal of changing the lathe's grinding wheel, resulting in low cost, simple operation, low difficulty requirements, and the achievement of surface roughness requirements.

Description

Technical Field

[0001] This utility model belongs to the technical field of machine tool processing auxiliary equipment, specifically, it relates to a device for expanding grinding wheels for small machine tools. Background Technology

[0002] In the process of repairing various roller conveyors and shafts for steelmaking and rolling mills in the company's machine repair shop, the problem of achieving the required surface roughness is often encountered. Even with precision machining or machine-made inserts, the desired effect cannot be achieved. Using external cylindrical grinding machines has drawbacks such as high investment, high cost, and low processing efficiency.

[0003] To address the aforementioned issues, the workshop, based on the principle of abrasive cloth grinding, and after extensive research, developed a portable grinding tool using high-speed rotating belt grinding. This tool is characterized by low cost, simple structure, and easy operation. Practical verification has shown that this tool fully meets the surface roughness requirements of cylindrical grinding machines. In view of this, this utility model is proposed. Utility Model Content

[0004] To address the common problem encountered by our company's machine repair shop during the repair of various roller conveyors and shafts for steelmaking and rolling mills, where surface roughness often fails to meet standards, even with precision machining or machine-made inserts, the desired results cannot be achieved. Furthermore, using cylindrical grinding machines presents drawbacks such as high investment costs, high expenses, and low processing efficiency. The basic concept of this utility model is as follows: A device for expanding a grinding wheel for a small machine tool includes a speed reducer and a fixed nose mounted on one side of the outer wall of the speed reducer. A motor is connected and mounted on the other side of the outer wall of the speed reducer. A drive pulley is connected to one output end of the speed reducer, and an annular sandpaper is rotatably mounted on the drive pulley.

[0005] In a preferred embodiment of this utility model, an adjusting rod is connected to one side of the outer wall of the active connecting shaft, an adjusting groove is formed on the outer wall of the adjusting rod, a connecting support shaft is slidably arranged on the inner wall of the adjusting groove, a fastening bolt is threadedly connected to the outer wall of the connecting support shaft, a support belt pulley is connected to the end of the connecting support shaft away from the fastening bolt, and the end of the annular sandpaper away from the active belt pulley is rotatably arranged on the outer wall of the support belt pulley.

[0006] In a preferred embodiment of this utility model, the motor is a variable frequency motor, and the speed can be adjusted by the control system to adapt to the grinding requirements of different materials.

[0007] In a preferred embodiment of this utility model, the inner wall of the adjusting groove is fitted to the outer wall of the connecting support shaft.

[0008] In a preferred embodiment of the present invention, the output end of the reducer is connected to an active connecting shaft, and one side of the outer wall of the active pulley is connected to the outer wall of the active connecting shaft.

[0009] Compared with the prior art, the present invention has the following advantages: This invention does not make any modifications to the original machine tool. It fully utilizes the original machine tool's transmission and adjustment devices and achieves the goal of changing the lathe's grinding mechanism by replacing the cutting tool with sandpaper. It is low-cost, simple to operate, and requires low difficulty, yet still meets the surface roughness requirements.

[0010] This invention allows the connecting support shaft to move within the adjusting groove by adjusting the fastening bolts. This adjusts the distance between the support belt pulley and the drive belt pulley, enabling the disassembly and replacement of the ring-shaped sandpaper. It also allows for adjustment of the tension of the ring-shaped sandpaper, improving stability during the sanding process.

[0011] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0012] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the top side structure of this utility model; Figure 3 This is a schematic diagram of the adjusted structure of this utility model.

[0013] In the diagram: 1. Reducer; 2. Fixed nose; 3. Motor; 4. Drive connecting shaft; 5. Drive pulley; 6. Annular sandpaper; 7. Support belt pulley; 8. Adjusting rod; 9. Adjusting slide; 10. Fastening bolt; 11. Connecting support shaft. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0015] like Figures 1 to 3 As shown, a device for expanding a grinding wheel for a small machine tool includes a reducer 1 and a fixed nose 2 installed on one side of the outer wall of the reducer 1. A motor 3 is connected and installed on the other side of the outer wall of the reducer 1. A drive pulley 5 is connected to one side of the output end of the reducer 1. An annular sandpaper 6 is rotatably mounted on the drive pulley 5.

[0016] Furthermore, an adjusting rod 8 is connected to one side of the outer wall of the active connecting shaft 4. An adjusting groove 9 is provided on the outer wall of the adjusting rod 8. A connecting support shaft 11 is slidably provided on the inner wall of the adjusting groove 9. A fastening bolt 10 is threadedly connected to the outer wall of the connecting support shaft 11. A support belt pulley 7 is connected to the end of the connecting support shaft 11 away from the fastening bolt 10. The end of the annular sandpaper 6 away from the active belt pulley 5 is rotatably mounted on the outer wall of the support belt pulley 7.

[0017] Furthermore, motor 3 is a variable frequency motor, and its speed can be adjusted by the control system to adapt to the grinding requirements of different materials. The inner wall of the adjusting groove 9 is properly fitted with the outer wall of the connecting support shaft 11, thereby improving the tightness of the connecting support shaft 11 on the inner wall of the adjusting groove 9 and thus improving the stability during the installation and grinding process.

[0018] Furthermore, the output end of the reducer 1 is connected to an active connecting shaft 4, and one side of the outer wall of the active pulley 5 is connected to the outer wall of the active connecting shaft 4. The output end of the motor 3 drives the output end of the reducer 1 to rotate, thereby driving the active connecting shaft 4 to rotate, which in turn drives the active pulley 5 to rotate, and finally drives the annular sandpaper 6 to rotate for polishing.

[0019] The implementation principle of the device for expanding the grinding wheel of a small machine tool in this embodiment is as follows: First, the entire device is fixed to the machine tool fixture by the fixing lug 2 on one side of the outer wall, so that the entire device can be installed and fixed on the machine tool. Then, the workpiece to be ground is fixed, and then the main power of the lathe is turned on and adjusted to the appropriate gear. Turn on the separate power switch of the device, manually or automatically position the tool, find the starting point and the ending point, set the grinding process, and then run the fixture slide of the machine tool to drive the entire device to perform normal turning and grinding operations. Pay attention to the grinding wheel rotation direction and appropriate feed rate. This device does not require any modification to the original machine tool. It makes full use of the original machine tool transmission and adjustment device. By changing the cutting tool to grinding sandpaper, the idea of ​​turning the lathe into a grinding tool is realized. It is low in cost, simple to operate, has low difficulty requirements, and achieves the surface roughness requirements. When the annular sandpaper 6 needs to be replaced, first rotate the fastening bolt 10 in the opposite direction, so that the fastening bolt 10 moves outward along the outer wall of the connecting support shaft 11. At this time, one side of the outer wall of the fastening bolt 10 will move away from the outer wall of the adjusting rod 8, thereby releasing the compression limit between the fastening bolt 10 and the adjusting rod 8. After releasing the positioning of the connecting support shaft 11, the position limit of the support belt pulley 7 can be released. Then, by moving the support belt pulley 7, the connecting support shaft 11 is moved along the inner wall of the adjusting groove 9, thereby adjusting the distance between the support belt pulley 7 and the drive pulley 5. By reducing the distance between the two, the annular sandpaper 6 can be removed. Then, the new annular sandpaper 6 is placed between the two. By adjusting the position of the support belt pulley 7, the tension of the annular sandpaper 6 can be adjusted to complete the installation. This allows for quick disassembly and installation of annular sandpaper 6 of different specifications and lengths, while improving the tension stability of the annular sandpaper 6 during the grinding process.

Claims

1. A device for expanding a grinding wheel for a small machine tool, comprising a speed reducer (1) and a fixing nose (2) mounted on the outer wall of one side of the speed reducer (1), characterized in that, A motor (3) is connected and installed on the outer wall of the other side of the reducer (1). A drive pulley (5) is connected to the output end of the reducer (1). A ring-shaped sandpaper (6) is rotatably mounted on the drive pulley (5).

2. The device for expanding grinding wheels for small machine tools according to claim 1, characterized in that, An adjusting rod (8) is connected to one side of the outer wall of the active connecting shaft (4). An adjusting groove (9) is provided on the outer wall of the adjusting rod (8). A connecting support shaft (11) is slidably provided on the inner wall of the adjusting groove (9). A fastening bolt (10) is threadedly connected to the outer wall of the connecting support shaft (11). A support belt pulley (7) is connected to one end of the connecting support shaft (11) away from the fastening bolt (10). The end of the annular sandpaper (6) away from the active belt pulley (5) is rotatably provided on the outer wall of the support belt pulley (7).

3. The device for expanding grinding wheels for small machine tools according to claim 1, characterized in that, The motor (3) is a variable frequency motor, and its speed can be adjusted by the control system to adapt to the grinding needs of different materials.

4. The device for expanding grinding wheels for small machine tools according to claim 2, characterized in that, The inner wall of the adjusting groove (9) fits snugly against the outer wall of the connecting support shaft (11).

5. The device for expanding grinding wheels for small machine tools according to claim 1, characterized in that, The output end of the reducer (1) is connected to an active connecting shaft (4), and one side of the outer wall of the active pulley (5) is connected to the outer wall of the active connecting shaft (4).

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