Simple auxiliary tool for precision machining of surface grinder

Abstract

This utility model discloses a simple auxiliary tooling for precision machining on a surface grinder, including a main body and a base. The main body is slidably mounted on the base, and a lead screw is mounted on the base, connecting the main body to the lead screw. A spindle is mounted in the main body, with a chuck mounted at the front end and a drive mechanism connected to the rear end. A drive gear is mounted on the spindle, and a driven gear is mounted on the lead screw via a nut. A transmission gear is provided between the drive gear and the driven gear, meshing with both the driven gear and the drive gear. The drive mechanism drives the spindle to rotate, causing the drive gear to drive the driven gear to rotate, thus moving the main body along the lead screw. This achieves a situation where for every revolution of the hand crank, the driven gear rotates a specific number of revolutions, driving the workpiece on the chuck to perform high-precision feeding. This allows for precision machining such as thread cutting when used with a conventional surface grinder, thereby reducing machining costs and saving machining time.

Description

Technical Field

[0001] This utility model relates to the field of industrial production equipment technology, and in particular to a simple auxiliary tooling for precision thread processing on a surface grinder. Background Technology

[0002] For high-precision quenched threaded parts, if all machining is completed before quenching, it is difficult to guarantee the dimensional and geometric tolerances after quenching. Therefore, roughing is usually done before quenching, followed by precision grinding using a thread grinding machine. However, thread grinding machines are complex and expensive. For example, Chinese utility model patent CN202222144116.5 discloses a combined turning and grinding machine for external threads, which can perform external thread grinding and significantly improve the machining accuracy of the workpiece. However, purchasing such a thread grinding machine is clearly not economical for processing small batches of high-precision quenched threaded parts. Outsourcing the workpieces to specialized processing companies will also increase the cost of thread grinding, while adding time for transportation and scheduling, resulting in a long processing cycle. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a simple auxiliary tooling for precision machining on surface grinders that is simple in structure, easy to use, low in cost, and saves processing time.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a simple auxiliary tooling for precision machining of a surface grinder, comprising a main body and a base, the main body being slidably mounted on the base, a lead screw being mounted on the base, and the main body and the lead screw being connected to form a movable structure; a spindle being mounted in the main body, a chuck for fixing the workpiece being mounted at the front end of the spindle, and a drive mechanism being connected to the tail end of the spindle; a drive gear being mounted on the spindle, and a driven gear being mounted on the lead screw via a nut; a detachable and adjustable transmission gear being provided between the drive gear and the driven gear, the driven gear meshing with the transmission gear, and the transmission gear meshing with the drive gear; the drive mechanism drives the spindle to rotate, causing the drive gear to drive the driven gear to rotate, thereby realizing the movement of the main body along the lead screw.

[0005] Furthermore, the transmission gear includes a first transmission gear and a second transmission gear, which are detachably mounted on the side of the main unit via gear mounting handles; the first transmission gear meshes with the driving gear, the second transmission gear meshes with the first transmission gear, and the driven gear meshes with the second transmission gear.

[0006] Furthermore, two arc-shaped adjustment holes are provided along the side of the main unit, with each of the two transmission gears corresponding to one adjustment hole; the tail parts of the two gear mounting handles are respectively mounted next to the corresponding adjustment holes via mounting posts, and the two transmission gears are respectively mounted on the front of the corresponding gear mounting handles. A positioning screw is fixed in the middle of the gear mounting handle, and the position of the corresponding transmission gear is fixed by locking the positioning screw in the corresponding adjustment hole.

[0007] Furthermore, the drive mechanism employs a hand crank, which is mounted at the tail end of the main shaft and located behind the drive gear.

[0008] Furthermore, a guide rail is installed on the base, and the guide rail is parallel to the direction of the main shaft and the lead screw; the main body is mounted on a slide, and the slide is mounted on the guide rail via a slider bracket; the slide is connected to the lead screw via a nut.

[0009] Furthermore, a lead screw fixing seat is installed at the tail end of the base. The lead screw is fixedly installed on the lead screw fixing seat and suspended above the base, and the driven gear is located in front of the lead screw fixing seat.

[0010] Furthermore, a telescopic cover for covering the lead screw is installed on the base. The front end of the telescopic cover is connected and fixed to the base, and the rear end is connected and fixed to the slide.

[0011] Preferably, the chuck is a three-jaw chuck, which can be conveniently used to fix workpieces such as screws.

[0012] This invention utilizes a hand crank to drive the spindle and drive gear to rotate, which in turn drives an adjustable transmission gear, which in turn drives a driven gear. This ensures that for every revolution of the hand crank, the driven gear rotates a specific number of times, thus enabling high-precision feeding of the workpiece on the chuck. It can be used in conjunction with a conventional surface grinder for precision machining such as thread cutting. The entire fixture structure is relatively simple and can be used with a company's own surface grinder to reduce processing costs and save processing time. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a side view of the present invention.

[0015] Figure 3 This is a schematic plan view of the present invention along its longitudinal direction;

[0016] Figure 4 This is a schematic diagram of the installation structure of the first and second transmission gears.

[0017] In the diagram, 1 is the main base, 11 is the main spindle, 12 is the chuck, 13 is the adjustment hole, 21 is the driving gear, 22 is the first transmission gear, 23 is the second transmission gear, 24 is the driven gear, 31 is the gear mounting handle, 32 is the mounting post, 33 is the positioning screw, 4 is the lead screw, 41 is the nut, 42 is the lead screw fixing seat, 5 is the base, 51 is the guide rail, 6 is the slide, 61 is the slider, 7 is the hand crank, and 8 is the telescopic cover. Detailed Implementation

[0018] In this embodiment, refer to Figures 1-4 The simple auxiliary tooling for precision machining of the surface grinder includes a main body base 1 and a base 5. The main body base 1 is slidably mounted on the base 5, and a lead screw 4 is mounted on the base 5. The main body base 1 and the lead screw 4 are connected to form a movable structure. A spindle 11 is mounted in the main body base 1. A chuck 12 for fixing the workpiece is mounted at the front end of the spindle 11, and a drive mechanism is connected to the tail end of the spindle 11. A drive gear 21 is mounted on the spindle 11, and a driven gear 24 is mounted on the lead screw 4 through a nut 41. A detachable and adjustable transmission gear is provided between the drive gear 21 and the driven gear 24. The driven gear 24 meshes with the transmission gear, and the transmission gear meshes with the drive gear 21. The drive mechanism drives the spindle 11 to rotate, causing the drive gear 21 to drive the driven gear 24 to rotate, thereby moving the main body base 1 along the lead screw 4.

[0019] The transmission gears include a first transmission gear 22 and a second transmission gear 23. The two transmission gears are detachably mounted on the side of the main unit 1 via a gear mounting handle 31, so that transmission gears with different numbers of teeth can be replaced by removing the gear mounting handle 31. The first transmission gear 22 meshes with the driving gear 21, the second transmission gear 23 meshes with the first transmission gear 22, and the driven gear 24 meshes with the second transmission gear 23.

[0020] Two arc-shaped adjustment holes 13 are provided on the side of the main unit 1, with each of the two transmission gears corresponding to one adjustment hole 13. The tails of the two gear mounting handles 31 are respectively mounted next to the corresponding adjustment holes 13 via mounting posts 32. The two transmission gears are respectively mounted on the front of the corresponding gear mounting handles 31. A positioning screw 33 is fixed in the middle of the gear mounting handle 31. By locking the positioning screw 33 in the corresponding adjustment hole 13, the position of the corresponding transmission gear is fixed. In this way, the position of the transmission gear can be adjusted to accommodate gears of different diameters.

[0021] The drive mechanism adopts a hand crank 7, which is installed at the tail end of the main shaft 11 and located behind the drive gear 21. The workpiece processing feed can be controlled by manually cranking the hand crank 7.

[0022] A guide rail 51 is installed on the base 5, and the guide rail 51 is parallel to the direction of the main shaft 11 and the lead screw 4; the main body 1 is installed on a slide 6, and the slide 6 is mounted on the guide rail 51 by a slider 61; the slide 6 is connected to the lead screw 4 by a nut 41.

[0023] A lead screw fixing seat 42 is installed at the tail end of the base 5. The lead screw 4 is fixedly installed on the lead screw fixing seat 42 and suspended above the base 5. The driven gear 24 is located in front of the lead screw fixing seat 42.

[0024] A telescopic cover 8 is installed on the base 5 to cover the lead screw 4. The front end of the telescopic cover 8 is connected and fixed to the base 5, and the rear end is connected and fixed to the slide 6. When the main body base 1 and the slide 6 move along the guide rail 51, the telescopic cover 8 will extend and retract accordingly to prevent the debris generated during processing from falling onto the guide rail 51 and the lead screw 4, thus providing protection.

[0025] The chuck 12 is a three-jaw chuck, which can be conveniently used to fix workpieces such as screws.

[0026] During processing, this invention is used in conjunction with a common surface grinder. For every rotation of the hand crank 7, the driven gear 24 rotates a corresponding number of times. For example, if the lead screw 4 and nut 41 have a pitch of 2mm, then for every rotation of nut 41, the main unit moves 2mm. If processing a 1mm thread, as long as the final gear ratio of the four gears is 1:2, a 1mm thread can be ground in one rotation. If the pitch is 2mm, only the two middle transmission gears need to be replaced (changing the number of teeth) to achieve a 1:1 gear ratio, thus processing a 2mm thread in one rotation. Therefore, by simply changing the transmission gears with different numbers of teeth, threads with different pitches can be processed.

[0027] For threaded workpieces with a pitch of 1mm and a length of 50mm, the processing cost is approximately 35 yuan per piece, and the processing time is less than 2 hours per piece. In contrast, the cost of outsourcing the processing to a company with precision thread grinding machines is approximately 150 yuan per piece, and the processing cycle, including transportation and other factors, requires at least 24 hours.

[0028] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A simple auxiliary tooling for precision machining on a surface grinder, characterized in that: The device includes a main body and a base. The main body is slidably mounted on the base, and a lead screw is mounted on the base. The main body and the lead screw are connected to form a movable structure. A spindle is mounted in the main body. A chuck for fixing the workpiece is mounted at the front end of the spindle, and a drive mechanism is connected to the tail end of the spindle. A drive gear is mounted on the spindle, and a driven gear is mounted on the lead screw via a nut. A detachable and adjustable transmission gear is provided between the drive gear and the driven gear. The driven gear meshes with the transmission gear, and the transmission gear meshes with the drive gear. The drive mechanism drives the spindle to rotate, which in turn drives the driven gear to rotate, thus moving the main body along the lead screw. The transmission gears include a first transmission gear and a second transmission gear, which are detachably mounted on the side of the main unit via gear mounting handles; the first transmission gear meshes with the driving gear, the second transmission gear meshes with the first transmission gear, and the driven gear meshes with the second transmission gear. Two arc-shaped adjustment holes are provided on the side of the main unit, with each of the two transmission gears corresponding to one adjustment hole. The tail of the two gear mounting handles is mounted next to the corresponding adjustment hole via mounting posts. The two transmission gears are mounted on the front of the corresponding gear mounting handles. A positioning screw is fixed in the middle of the gear mounting handle. The position of the corresponding transmission gear is fixed by locking the positioning screw in the corresponding adjustment hole.

2. The simple auxiliary tooling for precision machining of a surface grinder according to claim 1, characterized in that: The drive mechanism uses a hand crank, which is installed at the tail end of the main shaft and located behind the drive gear.

3. The simple auxiliary tooling for precision machining of a surface grinder according to claim 1, characterized in that: A guide rail is installed on the base, and the guide rail is parallel to the direction of the spindle and the lead screw; the main body is mounted on a slide, and the slide is mounted on the guide rail by a slider bracket; the slide is connected to the lead screw by a nut.

4. The simple auxiliary tooling for precision machining of a surface grinder according to claim 1, characterized in that: A lead screw fixing seat is installed at the tail end of the base. The lead screw is fixedly installed on the lead screw fixing seat and suspended above the base. The driven gear is located in front of the lead screw fixing seat.

5. The simple auxiliary tooling for precision machining of a surface grinder according to claim 3, characterized in that: A telescopic cover is installed on the base to cover the lead screw. The front end of the telescopic cover is connected and fixed to the base, and the rear end is connected and fixed to the slide.

6. The simple auxiliary tooling for precision machining of a surface grinder according to claim 1, characterized in that: The chuck is a three-jaw chuck.

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