High-speed hobbing tool for thin-walled workpiece

Abstract

The utility model discloses a high-speed hobbing tool for thin-walled workpieces, which relates to the field of hobbing and comprises a workbench, a chuck for clamping a workpiece body is rotatably arranged on the workbench, a fixed column is fixedly arranged on the workbench in the direction facing the chuck, a telescopic column is slidably connected in the fixed column, and the telescopic column is movably connected with the chuck. The telescopic column is rotationally connected into the fixed column at the same time, the end of the telescopic column is coaxially connected with a screw rod, the end of the screw rod is rotationally connected with a plurality of rotating frames, the screw rod is in threaded connection with a knob ring, and the end, facing the rotating frames, of the knob ring is rotationally connected with a moving ring; a sliding groove is formed in the face, facing the screw rod, of the rotating frame in the length direction, and the movable ring is rotationally connected with a supporting rod. The supporting structure capable of being unfolded at the tail end of the ejector rod structure is used for supporting the inner wall of the workpiece, the phenomenon that the workpiece is pressed and deformed when the hobbing cutter conducts hobbing machining on the outer wall of the thin-wall workpiece is avoided, and the stability of hobbing machining of the thin-wall workpiece is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of gear hobbing, in particular to a tooling for high-speed gear hobbing of thin-walled parts. Background Art

[0002] Gear hobbing is a continuous indexing process in which the tool and workpiece rotate in a constant relationship while the hob is fed into the workpiece, cutting the outer wall of the workpiece to achieve gear hobbing of the workpiece.

[0003] Existing gear hobbing tooling generally includes a chuck for clamping a workpiece and a hob for cutting the workpiece. The hob and the chuck rotate at a constant speed, and the hob is fed toward the workpiece to perform gear hobbing on the workpiece.

[0004] With respect to the above-mentioned related technologies, the existing gear hobbing tooling is generally suitable for gear hobbing of cylindrical solid workpieces. When gear hobbing is performed on thin-walled hollow cylindrical workpieces, the radial force of the hob on the workpiece is likely to cause the workpiece to deform. The eccentric vibration generated by the deformed workpiece during rotation is likely to cause the hob and the teeth cut on the workpiece to be misaligned, thereby affecting the quality of the gear hobbing. In summary, the existing gear hobbing tooling is not easy to perform stable gear hobbing on thin-walled hollow workpieces. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a high-speed gear hobbing tool for thin-walled parts, so as to solve the technical problem that the existing gear hobbing tool is not easy to perform stable gear hobbing on thin-walled hollow workpieces.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a thin-walled high-speed gear hobbing processing tool, comprising a workbench, the workbench is rotatably provided with a chuck for clamping a workpiece body, the workbench is fixedly provided with a fixed column in the direction of the chuck, the fixed column is slidably connected with a telescopic column, the telescopic column is rotatably connected in the fixed column at the same time, the end of the telescopic column is coaxially connected with a screw, the end of the screw is rotatably connected with multiple rotating frames, the screw is threadedly connected with a knob ring, the knob ring is rotatably connected with a movable ring towards one end of the rotating frame, the rotating frame is provided with a slide groove along the length direction, the movable ring is rotatably connected with a support rod, the support rod rotates at one end away from the moving ring and is slidably connected in the slide groove at the same time, and the side of the rotating frame away from the screw can contact the inner wall of the workpiece body.

[0007] By adopting the above technical solution, the inner wall of the workpiece is supported by the support structure that can be deployed at the end of the push rod structure, providing radial support force for the workpiece, thereby preventing the hob from pressing the workpiece and causing it to deform when performing gear hobbing on the outer wall of the thin-walled workpiece, thereby effectively improving the stability of the gear hobbing of the thin-walled workpiece.

[0008] The utility model is further configured that a telescopic block is slidably connected to one side of the rotating frame away from the screw rod along the length direction, and a positioning knob for fixing the telescopic block is connected to one end of the rotating frame away from the screw rod.

[0009] By adopting the above technical solution, the workpiece body can be stably supported even when the inner diameter of the workpiece body is large.

[0010] The utility model is further configured such that a side of the telescopic block away from the screw rod and a side of the rotating frame away from the screw rod are flush with each other.

[0011] By adopting the above technical solution, it is avoided that a step occurs on the side where the telescopic block and the rotating frame contact the workpiece body, which affects the stability of the contact between the inner wall of the workpiece body and the telescopic block and the rotating frame.

[0012] The utility model is further configured that one end of the telescopic block is fixedly connected to a first stop block.

[0013] By adopting the above technical solution, the workpiece body can be further clamped.

[0014] The utility model is further configured that a second stopper is connected to one end of the rotating frame close to the screw rod, the first stopper and the second stopper are both arranged on the same plane, and a rope with a conical structure is wound between the first stopper and the second stopper.

[0015] By adopting the above technical solution, the ability to support the inner wall of the workpiece body is further improved.

[0016] The utility model is further configured that a moving mechanism is arranged on the workbench, and a hob for processing the workpiece body is installed on the moving mechanism.

[0017] By adopting the above technical solution, when the chuck rotates, the gear hobbing process of the workpiece body is realized by utilizing the hobbing cutter moving on the worktable.

[0018] The utility model is further configured that the ends of the screw rods are rotatably connected to four rotating racks in a ring-shaped manner and at even intervals.

[0019] By adopting the above technical solution, a good supporting effect is achieved on the workpiece body.

[0020] To sum up, the utility model mainly has the following beneficial effects: the utility model arranges a retractable push rod structure at the position of the workbench corresponding to the chuck, and uses the support structure that can be unfolded at the end of the push rod structure to support the inner wall of the workpiece, thereby providing radial support force for the workpiece, avoiding the hob from compressing the workpiece and deforming it when performing gear hobbing on the outer wall of the thin-walled workpiece, thereby effectively improving the stability of gear hobbing of thin-walled workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of the utility model;

[0022] Figure 2 For the utility model Figure 1 A magnified view of middle;

[0023] Figure 3 This is a three-dimensional diagram of a support assembly according to Embodiment 1 of the present utility model;

[0024] Figure 4 This is a three-dimensional diagram of the supporting assembly of the second embodiment of the present utility model in a state where the rope is not wound;

[0025] Figure 5 This is a three-dimensional diagram of the rope-wound state of the support assembly of the second embodiment of the utility model.

[0026] In the figure: 1. workbench; 2. chuck; 3. moving mechanism; 4. hob; 5. fixed column; 6. telescopic column; 7. screw; 8. rotating frame; 9. moving ring; 10. knob ring; 11. support rod; 12. slide; 13. telescopic block; 14. first stopper; 15. second stopper; 16. positioning knob; 17. rope; 18. workpiece body. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0028] The following describes an embodiment of the utility model based on its overall structure.

[0029] Embodiment 1

[0030] A high-speed gear hobbing tool for thin-walled parts, such as Figure 1-3As shown, it includes a workbench 1, which is rotatably provided with a chuck 2 for clamping a workpiece body 18, a fixed column 5 is fixedly provided on the workbench 1 in the direction of the chuck 2, and a telescopic column 6 is slidably connected inside the fixed column 5. Specifically, the sliding connection between the telescopic column 6 and the fixed column 5 is a common hydraulic push rod structure, and the telescopic column 6 is rotatably connected to the fixed column 5 at the same time. Specifically, a bearing is provided at the end of the telescopic column 6, and a screw 7 is coaxially connected to the end of the telescopic column 6. A plurality of rotating frames 8 are rotatably connected to the end of the screw 7, and a knob ring 10 is threadedly connected to the screw 7. A moving ring 9 is rotatably connected to the knob ring 10 at one end of the rotating frame 8. Specifically, the moving ring 9 does not contact the screw 7, and a slide groove 12 is provided on a side of the rotating frame 8 facing the screw 7 along the length direction. The moving ring 9 is rotatably connected to a support rod 11, and the end of the support rod 11 away from the moving ring 9 rotates and is slidably connected in the slide groove 12 at the same time, and the side of the rotating frame 8 away from the screw 7 can contact the inner wall of the workpiece body 18.

[0031] See also Figure 1-3 A moving mechanism 3 is provided on the workbench 1. Specifically, the moving mechanism 3 specifically includes two sets of moving rails and a moving platform that are orthogonal to each other in the horizontal direction, and a lifting structure in the vertical direction. A hob 4 for processing the workpiece body 18 is installed on the moving mechanism 3. When the workpiece body 18 is subjected to gear hobbing, the hob 4 is driven by a driving motor installed on the moving mechanism 3 to rotate. When the chuck 2 rotates, the gear hobbing of the workpiece body 18 is realized by using the hob 4 moving on the workbench 1. The end of the screw 7 is rotatably connected to four rotating frames 8 at evenly spaced intervals in a ring shape. The four rotating frames 8 are distributed in an evenly spaced ring structure, which can effectively disperse the radial force of the workpiece body 18 and provide a good supporting effect on the workpiece body 18.

[0032] See also Figure 1-3 The side of the rotating frame 8 away from the screw rod 7 is slidably connected with a telescopic block 13 along the length direction, and the end of the rotating frame 8 away from the screw rod 7 is connected with a positioning knob 16 for fixing the telescopic block 13. The telescopic block 13 that can be extended is used to expand the support range of the support structure. When the inner diameter of the workpiece body 18 is large, the workpiece body 18 can be stably supported. The side of the telescopic block 13 away from the screw rod 7 and the side of the rotating frame 8 away from the screw rod 7 are flush with each other, avoiding the formation of steps on the side where the telescopic block 13 and the rotating frame 8 contact the workpiece body 18, affecting the stability of the contact between the inner wall of the workpiece body 18 and the telescopic block 13 and the rotating frame 8.

[0033] Embodiment 2

[0034] A high-speed gear hobbing tool for thin-walled parts, such as Figure 1-5As shown, on the basis of Example 1, the difference from Example 1 is that one end of the telescopic block 13 is fixedly connected to the first stop block 14, and when the telescopic block 13 contacts the inner wall of the workpiece body 18, the telescopic block 13 is slid to move the first stop block 14 toward the workpiece body 18, and the telescopic block 13 is fixed when the first stop block 14 contacts the end face of the workpiece body 18, which can further clamp the workpiece body 18, and the second stop block 15 is connected to the end of the rotating frame 8 close to the screw 7, and the first stop block 14 and the second stop block 15 are both arranged on the same plane, and a rope 17 with a conical structure is wound between the first stop block 14 and the second stop block 15, and the rotating frame 8 and the telescopic block 13 structure wrapped with the rope 17 can expand the contact area with the workpiece body 18, and further enhance the ability to support the inner wall of the workpiece body 18.

[0035] The working principle of the utility model is as follows: after the workpiece body 18 is clamped on the chuck 2, the telescopic column 6 is extended, and the adjusting knob ring 10 is rotated to make the moving ring 9 slide along the axial direction on the screw rod 7. When the moving ring 9 moves toward the axis of rotation of the rotating frame 8, the support rod 11 connected to the moving ring 9 is rotated to open the rotating frame 8 until the outer wall of the rotating frame 8 contacts the inner wall of the workpiece body 18. When the inner diameter of the workpiece body 18 is large and the length of the rotating frame 8 is insufficient, the sliding telescopic block 13 is extended from the rotating frame 8, and the telescopic block 13 is fixed by tightening the positioning knob 16. When the outer wall of the rotating frame 8 or the telescopic block 13 contacts the inner wall of the workpiece body 18, the telescopic column 6 is extended to tighten the workpiece body 18, and then the hob 4 moving on the moving mechanism 3 can perform gear hobbing on the workpiece body 18.

[0036] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A tool for high-speed gear hobbing of thin-walled parts, comprising a workbench (1), wherein the workbench (1) is rotatably provided with a chuck (2) for clamping a workpiece body (18), characterized in that: The workbench (1) is fixedly provided with a fixed column (5) in the direction of the chuck (2), and a telescopic column (6) is slidably connected inside the fixed column (5). The telescopic column (6) is rotatably connected to the fixed column (5). The end of the telescopic column (6) is coaxially connected to a screw rod (7). The end of the screw rod (7) is rotatably connected to a plurality of rotating frames (8). A knob ring (10) is threadedly connected to the screw rod (7). The knob ring (10) is rotatably connected to one end of the rotating frame (8). A sliding groove (12) is provided on a side of the rotating frame (8) facing the screw rod (7) along the length direction. The movable ring (9) is rotatably connected to a support rod (11). The end of the support rod (11) away from the movable ring (9) rotates and is slidably connected in the sliding groove (12) at the same time. The side of the rotating frame (8) away from the screw rod (7) can contact the inner wall of the workpiece body (18).

2. The high-speed gear hobbing tool for thin-walled parts according to claim 1 is characterized in that: A telescopic block (13) is slidably connected to a side of the rotating frame (8) away from the screw rod (7) along the length direction, and a positioning knob (16) for fixing the telescopic block (13) is connected to an end of the rotating frame (8) away from the screw rod (7).

3. The high-speed gear hobbing tool for thin-walled parts according to claim 2, characterized in that: The side of the telescopic block (13) away from the screw rod (7) and the side of the rotating frame (8) away from the screw rod (7) are flush with each other.

4. The high-speed gear hobbing tool for thin-walled parts according to claim 2, characterized in that: One end of the telescopic block (13) is fixedly connected to a first stopper (14).

5. The high-speed gear hobbing tool for thin-walled parts according to claim 4, characterized in that: A second stopper (15) is connected to one end of the rotating frame (8) close to the screw rod (7); the first stopper (14) and the second stopper (15) are both arranged on the same plane; and a rope (17) with a conical structure is wound between the first stopper (14) and the second stopper (15).

6. The high-speed gear hobbing tool for thin-walled parts according to claim 1, characterized in that: The workbench (1) is provided with a moving mechanism (3), and a hob (4) for machining a workpiece body (18) is installed on the moving mechanism (3).

7. The high-speed gear hobbing tool for thin-walled parts according to claim 1, characterized in that: The ends of the screw rod (7) are rotatably connected to four rotating racks (8) in a ring-shaped manner and at even intervals.

Images