A special alignment tool for worm gear hobbing machining

Abstract

The utility model provides a kind of special alignment tool for worm wheel hobbing machine processing, including pressing plate, pressing plate is used to install in the T slot of hobbing machine table top, and pressing plate is machined with pressing plate threaded hole;Still include roof, and the bottom end surface of roof is machined with the positioning boss for and T slot cooperation, and one side of roof is provided with ear plate, and ear plate is machined with adjusting threaded hole in the position, adjusting threaded hole is installed with adjusting bolt by thread cooperation in the position, and through hole is machined on roof;Pressing plate and roof are fixedly connected by the locking bolt passing through through hole and pressing plate threaded hole. By using special tool, improve traditional alignment method, accurately align worm benchmark and workbench axial line coaxial in 0.005mm, improve artificial alignment efficiency, control processing accuracy.

Description

Technical Field

[0001] This utility model relates to the field of gear processing equipment technology, specifically to a special alignment fixture for worm gear hobbing. Background Technology

[0002] Current Situation and Problem Description: The Y546 worm gear hobbing machine is our company's largest and most critical piece of equipment, a machine tool for processing indexing worm gears. When processing large indexing worm gears, the total tonnage of the machining fixture and the workpiece can reach nearly 10 tons. Previously, the traditional method of aligning the workpiece with the rotation center of the worktable was used: directly striking the outer circumference of the workpiece with a large copper rod based on experience and perceived force, forcing the fixture and workpiece to move until they were nearly coaxial with the worktable axis. This method has the following problems: ① It is difficult to control the magnitude of the impact force and the desired direction of workpiece movement; too much or too little force will not work, and the impact point must be correct; ② The vibration during impact can cause errors or damage to the dial indicator or micrometer used to detect displacement, prolonging the alignment time; ③ Alignment requires two people to assist, one to hold the copper rod steady and the other to strike it, consuming manpower; ④ It is extremely unfriendly to the precision machining and standardized operation of core components. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a special alignment fixture for worm gear hobbing. By using this special fixture, the traditional alignment method is improved, and the worm gear reference is accurately aligned to be coaxial with the worktable axis by 0.005mm, thereby improving the efficiency of manual alignment and controlling the machining accuracy.

[0004] To achieve the above-mentioned technical features, the purpose of this utility model is as follows: a special alignment fixture for worm gear hobbing machine processing, including a pressure plate, the pressure plate being installed in a T-slot on the table of the hobbing machine, and the pressure plate having a pressure plate threaded hole. It also includes a top plate, the bottom end face of which is machined with a positioning boss for cooperating with a T-slot, one side of which is provided with an ear plate, and an adjustment threaded hole is machined at the location of the ear plate. An adjustment bolt is installed at the location of the adjustment threaded hole through the thread. A through hole is machined on the top plate. The pressure plate and the top plate are fixedly connected by locking bolts that pass through the through hole and the threaded hole of the pressure plate.

[0005] Preferably, the size of the pressure plate is smaller than the size of the bottom groove of the T-slot.

[0006] Preferably, the pressure plate and top plate are arranged in four groups and are evenly distributed in a circular pattern on the T-slot of the gear hobbing machine table.

[0007] Preferably, a washer is provided at the part where the locking bolt mates with the top plate.

[0008] Preferably, the adjusting bolt is machined with standard fine thread.

[0009] Preferably, the head end face of the adjusting bolt is used to press against the outer wall of the fixture.

[0010] Preferably, a steel ball is movably mounted on the end of the adjusting bolt.

[0011] The present invention has the following beneficial effects: 1. The purpose of this utility model is to replace the traditional method of aligning workpieces by hammering with a special alignment fixture, so as to avoid damage to the workpieces and testing instruments caused by hammering vibration. The fine thread screw adjustment can easily control the movement distance and direction of the workpiece, standardize the precision machining and operation of core parts, reduce the difficulty of alignment, and improve the alignment efficiency.

[0012] 2. By using a dedicated alignment fixture, this utility model can precisely control the distance and direction of the radial movement of the workpiece, significantly improving the workpiece alignment efficiency and greatly reducing labor intensity.

[0013] 3. By adopting the above-mentioned dimensional matching, it is ensured that the pressure plate can be smoothly installed into the bottom slide of the T-slot.

[0014] 4. By adopting a four-group structure, the fixture can be adjusted in four directions.

[0015] 5. The use of shims ensures the reliability and stability of the connection between the locking bolts and the pressure plate.

[0016] 6. By using standard fine-pitch threads to adjust the displacement of the fixture and the workpiece, it transforms the radial rotational motion around the screw's central axis into axial linear motion, directly pushing the workpiece to move radially or achieving positioning.

[0017] 7. Its small helix angle allows for easy and effortless jacking of the positioning fixture and workpiece to achieve controllable radial displacement in a preset direction. This is beneficial for achieving the minute, controllable movements required for fine alignment.

[0018] 8. The use of steel balls ensures that the subsequent adjusting bolts can rotate smoothly, thereby providing radial thrust and enabling the movement of the jig. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a three-dimensional structural diagram of the top plate of this utility model.

[0021] Figure 2 This is a three-dimensional structural diagram of the pressure plate of this utility model.

[0022] Figure 3 This is a three-dimensional view of the overall structure of the device of this utility model.

[0023] Figure 4 This is a partial three-dimensional diagram showing the specific working process of this utility model.

[0024] Figure 5 This is a top view showing the specific working process of this utility model.

[0025] In the diagram: Ear plate 1, Adjusting bolt 2, Adjusting threaded hole 3, Standard fine thread 4, Positioning boss 5, Top plate 6, Through hole 7, Pressure plate 8, Pressure plate threaded hole 9, T-slot 10, Gear hobbing machine table 11, Shim 12, Locking bolt 13, Fixture 14, Steel ball 15. Detailed Implementation

[0026] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0027] Example 1: See Figure 1-5 A specialized alignment fixture for worm gear hobbing machines includes a pressure plate 8, which is installed in a T-slot 10 on the hobbing machine table 11. The pressure plate 8 has threaded holes 9 machined into it. It also includes a top plate 6, with a positioning boss 5 machined on its bottom surface to mate with the T-slot 10. An ear plate 1 is provided on one side of the top plate 6, with an adjusting threaded hole 3 machined at its location. An adjusting bolt 2 is threadedly installed at the location of the adjusting threaded hole 3. A through hole 7 is machined on the top plate 6. The pressure plate 8 and the top plate 6 are fixedly connected by a locking bolt 13 passing through the through hole 7 and the threaded hole 9. This alignment fixture allows for precise control of the radial movement distance and direction of the workpiece, avoiding safety hazards caused by the operator standing on a high platform and forcefully impacting the workpiece. Although the T-slot width varies among worm gear hobbing machines, this design concept is applicable to other indexing worm gear hobbing machines using disc-type fixtures. This solution significantly improves workpiece alignment efficiency, greatly reduces labor intensity, simplifies processing, ensures stable and precise assembly positioning, and enhances production efficiency.

[0028] Furthermore, the size of the pressure plate 8 is smaller than the size of the bottom groove of the T-slot 10. By adopting the above-mentioned dimensional matching, it is ensured that the pressure plate 8 can be smoothly installed into the bottom groove of the T-slot 10.

[0029] Furthermore, the pressure plate 8 and the top plate 6 are arranged in four sets, evenly distributed in a circular pattern on the T-slot 10 of the gear hobbing machine table 11. By adopting a four-set structure, it is ensured that the fixture 14 can be adjusted in four directions.

[0030] Furthermore, a washer 12 is provided at the part where the locking bolt 13 mates with the top plate 6. The washer 12 ensures the reliability and stability of the connection between the locking bolt 13 and the pressure plate 8.

[0031] Furthermore, the adjusting bolt 2 is machined with a standard fine thread 4. By using the standard fine thread 4 to adjust the displacement of the fixture and the workpiece, it transforms the radial rotational motion around the central axis of the screw into axial linear motion, directly pushing the workpiece to move radially or achieving positioning.

[0032] Furthermore, the head end face of the adjusting bolt 2 is used to press against the outer wall of the fixture 14. This engagement ensures that the position of the fixture 14 can be adjusted subsequently using the adjusting bolt 2. Its small helix angle allows for easy and effortless movement of the positioning fixture and workpiece towards a predetermined direction, achieving controllable radial displacement. This facilitates the precise, controllable movement required for fine alignment.

[0033] Furthermore, a steel ball 15 is movably installed at the end of the adjusting bolt 2. The use of the steel ball 15 ensures that the adjusting bolt 2 can rotate smoothly, thereby providing radial thrust and realizing the movement of the fixture.

[0034] The specific working process and principle of this utility model are as follows: 1. Install the pressure plate 8 into the T-slot 10 of the gear hobbing machine table 11; 2. Place the top plate 6 in the T-slot 10, align the through hole 7 in the middle of the top plate 6 with the threaded hole 9 of the pressure plate 8, insert the locking bolt 13 into the through hole 7 and the threaded hole 9 of the pressure plate 8 and connect them by thread, without locking. 3. Move the top plate 6 and the pressure plate 8 until they are close to the jig 14 and then lock the pressure plate. At the same time, screw the adjusting bolt 2 into the adjusting threaded hole 3 on the side of the top plate 6. 4. The gear hobbing machine's worktable rotates, and the worm gear's inner hole is aligned using a dial indicator. Based on the dial indicator results, the adjusting bolt 2 is finely adjusted until the worm gear reference and the worktable's axis of rotation runout is within 0.005mm, thus meeting the alignment requirements. The fixture is then locked to prepare for the precision hobbing of the worm gear teeth.

Claims

1. A special alignment fixture for worm gear hobbing, characterized in that, Includes a pressure plate (8), which is used to install in the T-slot (10) of the gear hobbing machine table (11), and the pressure plate (8) has a pressure plate thread hole (9). It also includes a top plate (6), the bottom end face of the top plate (6) is machined with a positioning boss (5) for cooperating with the T-slot (10), one side of the top plate (6) is provided with an ear plate (1), an adjustment thread hole (3) is machined at the location of the ear plate (1), an adjustment bolt (2) is installed at the location of the adjustment thread hole (3) by thread engagement, and a through hole (7) is machined on the top plate (6); The pressure plate (8) and the top plate (6) are fixedly connected by locking bolts (13) passing through the through hole (7) and the threaded hole (9) of the pressure plate.

2. The special alignment fixture for worm gear hobbing as described in claim 1, characterized in that: The size of the pressure plate (8) is smaller than the size of the bottom groove of the T-slot (10).

3. The special alignment fixture for worm gear hobbing as described in claim 1, characterized in that: The pressure plate (8) and the top plate (6) are arranged in four groups and are evenly distributed in a circle on the T-slot (10) of the gear hobbing machine table (11).

4. The special alignment fixture for worm gear hobbing as described in claim 1, characterized in that: A washer (12) is provided at the part where the locking bolt (13) mates with the top plate (6).

5. The special alignment fixture for worm gear hobbing as described in claim 1, characterized in that: The adjusting bolt (2) is machined with a standard fine thread (4).

6. The special alignment fixture for worm gear hobbing as described in claim 1, characterized in that: The head end face of the adjusting bolt (2) is used to tighten the outer wall of the fixture (14).

7. The special alignment fixture for worm gear hobbing as described in claim 1, characterized in that: A steel ball (15) is movably installed at the end of the adjusting bolt (2).

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