Long-tooth-width gear shaping machine tool and machining method

Abstract

The long-tooth-width gear shaping machine tool comprises a machine tool body, a center hole is formed in a workbench of the machine tool body, a support is installed on the machine tool body, the support upwards penetrates through the center hole of the workbench, a sliding base is installed on one side of the support in an up-down sliding mode, and a telescopic plate is transversely installed on the sliding base in a sliding mode. The telescopic plate is rotationally connected with a cutter shaft of the machine tool body; a limiting device is installed on the sliding base and used for locking the telescopic plate. Under the condition that the diameter of the cutter shaft is not changed, the cutter shaft can be supported in an auxiliary mode in the gear shaping process, the cutting radial component force of the cutter shaft is counteracted, bending deformation of the far end of the cutter shaft is prevented, and the precision of gear shaping machining of ultra-long-tooth-width inner teeth is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of machine tools, and particularly relates to a long tooth-width gear shaping machine tool and a method thereof. Background Art

[0002] The long tooth-width generally refers to a tooth-width where the width of the tooth ring is above 800 mm. The machining of long tooth-width internal teeth has always been a difficult problem in the gear machining industry, and usually only a gear shaper can be used for machining. For example, Chinese document CN101125384A discloses a gear shaper. Since during gear shaping machining, the larger the tooth-width of the gear being machined, the larger the tool stroke range. And the tool for gear shaping machining is installed at the end of a slender tool shaft. When the tool moves to the lowest end, the tool shaft extends too long. Affected by the cutting force, it bends and deforms, reducing the tooth direction accuracy of the machined gear.

[0003] To solve the problem of tool shaft bending and deformation, the common method is to increase the diameter of the tool shaft, thereby enhancing the rigidity of the tool shaft. However, since the gear shaping tool is installed at the lower end of the tool shaft, and it is required that the root circle diameter of the tool must be larger than the diameter of the tool shaft to avoid cutting interference. Therefore, when the diameter of the tool shaft is larger, the applicable tool diameter is larger, which will cause problems such as increased tool cost and inconvenient installation and adjustment. Moreover, the ability to improve bending and deformation by increasing the diameter is limited, and bending cannot be completely avoided. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to solve the problems existing in the above background art, and provide a long tooth-width gear shaping machine tool and a machining method, which can assist in supporting the tool shaft during gear shaping without changing the diameter of the tool shaft, offset the radial component force of the tool shaft during cutting, prevent the distal end of the tool shaft from bending and deforming, and improve the accuracy of machining long tooth-width internal teeth.

[0005] To achieve the above technical features, the object of the present invention is achieved as follows: A long tooth-width gear shaping machine tool includes a machine tool body. A center hole is provided on the workbench of the machine tool body. A support is installed on the bed body. The support passes upward through the center hole of the workbench. A slide seat is slidably installed on one side of the support in the vertical direction. A telescopic plate is slidably installed on the slide seat in the horizontal direction. The telescopic plate is rotatably connected to the tool shaft of the machine tool body; A limiting device is installed on the slide seat, and the limiting device is used to lock the telescopic plate.

[0006] The support includes a fixed seat and a bracket. The fixed seat is fixedly installed on the bed body. The bracket is installed on the top of the fixed seat. The slide seat is slidably installed on the bracket; The top of the fixed seat is not higher than the top surface of the workbench.

[0007] A linear guide rail is longitudinally installed on one side of the bracket. A slider is installed on the slide seat, and the slider is slidably installed on the linear guide rail.

[0008] A transverse chute is provided at the top of the sliding seat, the telescopic plate is slidably installed in the chute, and the limiting device is installed at the top of the sliding seat; a longitudinal avoidance groove is provided on the support at a position corresponding to the telescopic plate.

[0009] The limiting device is a hydraulic cylinder. The cylinder body of the hydraulic cylinder is installed on the sliding seat, and the piston is located on the upper side of the telescopic plate. When the piston moves down to abut against the telescopic plate, the telescopic plate and the sliding seat are limited and fixed.

[0010] One end of the telescopic plate connected to the cutter shaft is provided with a through hole, and a bearing is installed in the through hole; a connecting cutter shaft is installed at the lower end of the cutter shaft, a cutter mounting position is provided on the connecting cutter shaft for installing a cutter, a flange is provided on the upper side of the cutter mounting position, the upper end of the connecting cutter shaft is inserted into the cutter shaft, the flange is connected to the lower end face of the cutter shaft by a connecting screw, a protruding shaft is provided at the lower end of the cutter mounting position, the protruding shaft penetrates into the inner hole of the bearing, and an end cover is installed at the end of the lower end of the protruding shaft by a positioning screw, and the end cover abuts against the inner ring of the bearing.

[0011] The connecting cutter shaft is further provided with a screw rod section between the cutter mounting position and the protruding shaft. The diameter of the screw rod section is larger than the diameter of the protruding shaft, and a tightening cutter nut is installed on the screw rod section. The tightening cutter nut abuts against the cutter to lock the cutter on the connecting cutter shaft.

[0012] The workbench of the machine tool body can reciprocate along the X2 direction on the bed, and the top of the workbench can rotate; the column of the machine tool body can reciprocate along the X1 direction on the bed; the cutter shaft can reciprocate along the Z direction, and the cutter shaft can also rotate.

[0013] The workbench includes a support seat and a rotating seat. An annular cavity is provided on the upper side of the support seat, a rotating ring body is provided on the lower side of the rotating seat, the rotating ring body is rotatably installed in the annular cavity, a worm gear is installed inside the annular cavity of the rotating ring body, and a worm is rotatably installed in the annular cavity. The worm is in meshing transmission with the worm gear.

[0014] A processing method for long-tooth-width gear shaping uses the described long-tooth-width gear shaping machine tool for processing an internal gear ring with a long tooth width. The processing method includes the following steps: Fix the workpiece to be processed with internal teeth to the workbench through a fixture. When the column moves away from the workbench, a feed movement is performed. When the workbench moves closer to the column, a relief movement is performed. When the cutter shaft moves downward, the tooth grooves of the workpiece are processed. When the workbench carries the workpiece and rotates, an indexing operation for gear shaping of the workpiece is performed. During the feed movement, the limiting device releases the telescopic plate, and after the feed movement ends, the limiting device locks the telescopic plate. When the tool spindle reciprocates along the Z direction, the slide base moves up and down following the tool spindle.

[0015] The present invention adopting the above technical solution, compared with the prior art, has the prominent features as follows: 1. The workbench of the machine tool body of the present invention is provided with a central hole, and a support is installed on the bed body. The support passes upward through the central hole of the workbench. A slide base is installed on one side of the support to slide up and down. A telescopic plate is installed on the slide base to slide horizontally. The telescopic plate is rotatably connected to the tool spindle of the machine tool body; a limiting device is installed on the slide base. The telescopic plate can automatically adjust the distance from the tool spindle and lock it. The telescopic plate is rotatably connected to the end of the tool spindle. During gear shaping cutting, the slide base reciprocates up and down following the tool spindle. When the tool spindle bends due to the cutting reaction force at the lowest end of the gear during cutting, the follower rest plays a supporting role for the tool spindle to prevent the tool spindle from bending and deforming, and can effectively improve the gear shaping accuracy of large tooth width gears.

[0016] 2. The workbench of the machine tool body of the present invention can reciprocate along the X direction on the bed body. The workbench carries the workpiece to perform a relief motion, and the top of the workbench can rotate. The column of the machine tool body can reciprocate along the X direction on the bed body. The tool spindle drives the tool to pass through the inner hole of the workpiece to perform up and down cutting motion and rotational motion. The tool and the workpiece rotate according to a specific hobbing ratio to realize the generation motion to cut out the tooth profile. The workbench drives the workpiece to perform a relief motion when the tool rises, while the slide base reciprocates up and down following the tool spindle. When the tool spindle bends due to the cutting reaction force at the lowest end of the gear during cutting, the support plays a supporting role for the tool spindle to prevent the tool spindle from bending and deforming, and can effectively improve the gear shaping accuracy and efficiency of large tooth width gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0018] Figure 1 It is a schematic diagram of the state of the machine tool of the present invention during machining.

[0019] Figure 2 It is a state diagram of the tool spindle extending during machining of the machine tool of the present invention.

[0020] Figure 3 It is a partial view of the connection between the support and the tool spindle of the present invention.

[0021] Figure 4 It is a state diagram of the tool spindle retracting during machining of the machine tool of the present invention.

[0022] Figure 5 It is Figure 3 The enlarged structural schematic diagram at position Q in

[0023] Figure 6 It isFigure 5 Schematic diagram of the A-A cross-sectional structure

[0024] Figure 7 is Figure 5 Schematic diagram of the B-B cross-sectional structure

[0025] Reference numerals: Bed body 1, workbench 2, support seat 210, annular cavity 211, worm 212, rotating seat 220, rotating ring body 221, worm gear 222; Column 3, tool rest 4, tool shaft 5, tool 6, fixture 7, workpiece 8; Support 10, fixed seat 11, bracket 12, avoidance groove 13. Linear guide 14, slider 15; Slide base 20, central hole 201, chute 21; Telescopic plate 30, through hole 31, bearing 32, retaining ring 33, end cover 34, positioning screw 35; Limit device 40, cylinder block 41, piston 42; Tool connecting shaft 50, tool mounting position 51, flange 52, connecting screw 53, protruding shaft 54, screw rod section 55, tool tightening nut 56. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] It should be noted that in the specification, references to "one embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. Additionally, when combining embodiments to describe specific features, structures, or characteristics, implementing such features, structures, or characteristics in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0028] See Figure 1 , a gear shaper generally includes a bed body 1, a workbench 2, a column 3, a tool rest 4, and a tool shaft 5. The workbench 2 and the column 3 are both installed on the bed body 1, the tool rest 4 is installed on the column 3, the tool shaft 5 is installed on the tool rest 4 with up and down telescoping, and the tool 6 is installed at the lower end of the tool shaft 5.

[0029] Embodiment 1: See Figure 1-7, A long-tooth-width gear shaping machine tool, including a machine tool body. The workbench 2 of the machine tool body is provided with a central hole 201. A support 10 is installed on the bed 1. The support 10 passes upward through the central hole 201 of the workbench 2. A slide block 20 is slidably installed on one side of the support 10 in the up and down direction. A telescopic plate 30 is slidably installed on the slide block 20 in the transverse direction. The telescopic plate 30 is rotatably connected to the cutter shaft 5 of the machine tool body; a limiting device 40 is installed on the slide block 20, and the limiting device 40 is used to lock the telescopic plate 30.

[0030] During the feed motion, the limiting device 40 releases the telescopic plate 30. After the feed motion ends, the limiting device 40 locks the telescopic plate 30; when the cutter shaft 5 reciprocates along the Z direction, the slide block 20 moves up and down following the cutter shaft 5. Through the above structure, without changing the diameter of the cutter shaft 6, it is possible to achieve auxiliary support for the cutter shaft 6 during gear shaping, offset the radial cutting component force of the cutter shaft, prevent the distal end of the cutter shaft from bending and deforming, and improve the accuracy of gear shaping for processing ultra-long tooth-width internal teeth.

[0031] This embodiment can be used to process ultra-long keyways.

[0032] Further, referring to Figure 2 、 3 , the support 10 includes a fixed seat 11 and a bracket 12. The fixed seat 11 is fixedly installed on the bed 1 by bolts. The bracket 12 is fixedly installed on the top of the fixed seat 11 by bolts. The slide block 20 is slidably installed on the bracket 12. The top surface of the fixed seat 11 is not higher than the top surface of the workbench 2. When auxiliary support for the cutter shaft 6 is not required, the bracket 12 can be removed, and the fixed seat 11 will not affect subsequent processing.

[0033] Referring to Figure 6 、 7 , a linear guide rail 14 is longitudinally installed on one side of the bracket 12. A slider 15 is installed on the slide block 20. The slider 15 is slidably installed on the linear guide rail 14. The longitudinal sliding of the slider 15 is achieved through the linear guide rail 14 and the slider 15, and the fitting accuracy is high. In this embodiment, two linear guide rails 14 are arranged at intervals and in parallel.

[0034] Referring to Figure 6 , a transverse chute 21 is provided on the top of the slide block 20. The telescopic plate 30 is slidably installed in the chute 21. The limiting device 40 is installed on the top of the slide block 20; a longitudinal avoidance groove 13 is provided on the support 10 at the position corresponding to the telescopic plate 30. Through the above structure, the telescopic plate 30 can be telescoped and locked. The avoidance groove 13 is used to provide a larger retraction space for the telescopic plate 30.

[0035] In this embodiment, referring to Figure 6 , the chute 21 is a rectangular groove, and the cross-section of one end of the telescopic plate 30 connected to the chute 21 is a rectangle adapted to the chute 21.

[0036] Continue to refer to Figure 6 In this embodiment, the limiting device 40 is a hydraulic cylinder. The cylinder body 41 of the hydraulic cylinder is installed on the sliding seat 20, and the piston 42 is located on the upper side of the telescopic plate 30. When the piston 42 moves downward to abut against the telescopic plate 30, the telescopic plate 30 and the sliding seat 20 are limited and fixed.

[0037] Specifically, the hydraulic cylinder in this embodiment is a single-acting cylinder. The top of the cylinder body 41 of the hydraulic cylinder is connected to a hydraulic pipeline. As Figure 5 shown, when the hydraulic system inputs pressure to the hydraulic cylinder, the piston 42 moves downward to tightly squeeze the telescopic plate 30, thereby limiting and fixing the telescopic plate 30 and the sliding seat 20. When the hydraulic cylinder is depressurized, the telescopic plate 30 can slide in the chute 21 again.

[0038] Refer to Figure 5 One end of the telescopic plate 30 connected to the tool shaft 5 is provided with a through hole 31, and a bearing 32 is installed in the through hole 31; a tool receiving shaft 50 is installed at the lower end of the tool shaft 5. A tool mounting position 51 is provided on the tool receiving shaft 50 for mounting a tool 6. A flange 52 is provided above the tool mounting position 51. The upper end of the tool receiving shaft 50 is inserted into the tool shaft 5, and the flange 52 is connected to the lower end face of the tool shaft 5 by a connecting screw 53. A protruding shaft 54 is provided at the lower end of the tool mounting position 51. The protruding shaft 54 passes through the inner hole of the bearing 32. An end cover 34 is installed at the lower end of the protruding shaft 54 through a positioning screw 35, and the end cover 34 abuts against the inner ring of the bearing 32. Through the above structure, the rotational connection between the telescopic plate 30 and the tool shaft 5 is realized.

[0039] When feeding is required, the positioning screw 35 is removed, and the protruding shaft 54 at the lower end of the tool receiving shaft 50 can be taken out from the inner ring of the bearing 32. At this time, the column 3 moves away from one side of the workbench 2, and the workpiece 8 to be processed can be clamped and fixed to the workbench 2 through the fixture 7. After the feeding is completed, the column 3 is reset, and then the protruding shaft 54 and the bearing 32 are reinstalled.

[0040] To prevent the bearing 32 from falling off, the telescopic plate 30 is provided with a convex ring above the through hole 31, and the outer ring above the bearing 32 abuts against the convex ring. A retaining ring 33 is installed below the through hole 31 of the telescopic plate 30, and the retaining ring 33 is installed on the telescopic plate 30 by screws.

[0041] Furthermore, to facilitate tool installation, a screw rod section 55 is also provided on the tool receiving shaft 50 between the tool mounting position 51 and the protruding shaft 54. The diameter of the screw rod section 55 is larger than the diameter of the protruding shaft 54. A tool tightening nut 56 is installed on the screw rod section 55, and the tool tightening nut 56 abuts against the tool 6 to lock the tool 6 on the tool receiving shaft 50.

[0042] Specifically, between the cutting tool 6 and the cutting tool mounting position 51, or between the cutting tool 6 and the flange 52, a parallel key pair can be used for position limitation to prevent the cutting tool 6 from rotating.

[0043] Embodiment 2: Based on Embodiment 1, the workbench 2 of the machine tool body can reciprocate along the X2 direction on the bed 1, and the top of the workbench 2 can rotate; the column 3 of the machine tool body can reciprocate along the X1 direction on the bed 1; the tool spindle 5 can reciprocate along the Z direction and can also rotate. With the above structure, it is convenient to improve the efficiency and accuracy of the machining of the long-tooth-width gear ring.

[0044] Refer to Figure 2 , the workbench 2 includes a support base 210 and a rotating base 220. An annular cavity 211 is provided on the upper side of the support base 210, and a rotating ring body 221 is provided on the lower side of the rotating base 220. The rotating ring body 221 is rotatably installed in the annular cavity 211. A worm gear 222 is installed inside the rotating ring body 221 located inside the annular cavity 211, and a worm 212 is rotatably installed in the annular cavity 211. The worm 212 is in meshing transmission with the worm gear 222, and the worm 212 can be driven by a servo motor.

[0045] It should be noted that both the workbench 2 and the column 3 can respectively achieve reciprocating motion along the X2 direction and reciprocating motion along the X1 direction by adopting the combination of linear guide rails and ball screw drives in the prior art.

[0046] Embodiment 3: Based on Embodiment 2, the present invention also discloses a machining method for long-tooth-width gear shaping, which adopts the above-mentioned long-tooth-width gear shaping machine tool for machining the internal gear ring with long tooth width. The machining method includes the following steps: Fix the workpiece 8 to be machined with internal teeth to the workbench 2 through the fixture 7.

[0047] Specifically, during loading, remove the positioning screw 35, lift the guide shaft 5, and take out the protruding shaft 54 at the lower end of the tool-connecting shaft 50 from the inner ring of the bearing 32. At this time, the column 3 moves away from the side of the workbench 2, and then the workpiece 8 to be machined can be fixed to the workbench 2 through the fixture 7. After loading, the column 3 is reset, and then the protruding shaft 54 and the bearing 32 are reinstalled.

[0048] During the machining process, when the column 3 moves away from the side of the workbench 2, a feed motion is performed; When the workbench 2 moves towards the column 3, a relief motion is performed to protect the cutting tool; When the tool spindle 5 moves downward, the tooth grooves of the workpiece 8 are machined; When the workbench 2 carries the workpiece 8 and rotates, an indexing cycle machining of the workpiece is performed; During the feed movement, the limiting device 40 releases the telescopic plate 30, and after the feed movement ends, the limiting device 40 locks the telescopic plate 30; When the tool spindle 5 reciprocates along the Z direction, the slide base 20 moves up and down following the tool spindle 5.

[0049] The workbench 2 reciprocates along the X2 direction on the bed 1, and the top of the workbench 2 can rotate. Also, the column 3 of the machine tool body can reciprocate along the X1 direction on the bed 1. The telescopic plate 30 can automatically adjust the distance from the tool spindle 5 and lock. The telescopic plate 30 is rotationally connected to the end of the tool spindle 5. During gear shaping cutting, the tool spindle 5 drives the tool 6 to pass through the inner hole of the workpiece 8 for up-and-down cutting movement and rotational movement. The tool 6 and the workpiece 8 rotate according to a specific hobbing ratio to achieve the generating movement to cut out the tooth profile. The workbench drives the workpiece to perform a relief movement when the tool ascends, and the slide base 20 reciprocates up and down following the tool spindle 5. When the tool spindle 5 bends due to the cutting reaction force at the lowest end of the gear during cutting, the support 10 supports the tool spindle 5 to prevent the tool spindle 5 from bending and deforming, which can effectively improve the gear shaping precision and efficiency of large tooth width gears.

[0050] Although the specific embodiments of the present invention have been described above, those skilled in the art of this technology should understand that the specific embodiments we described are illustrative rather than used to limit the scope of the present invention. Effective modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be covered by the scope protected by the claims of the present invention.

Claims

1. A long-tooth wide gear shaping machine tool, comprising a machine tool body, characterized in that: The workbench (2) of the machine tool body is provided with a central hole (201). A support (10) is installed on the bed body (1). The support (10) passes upward through the central hole (201) of the workbench (2). A sliding seat (20) is installed on one side of the support (10) to slide up and down. A telescopic plate (30) is installed on the sliding seat (20) to slide horizontally. The telescopic plate (30) is rotatably connected to the tool shaft (5) of the machine tool body; A limiting device (40) is installed on the sliding seat (20), and the limiting device (40) is used to lock the telescopic plate (30).

2. The long-tooth wide gear shaping machine tool according to claim 1, wherein: The support (10) includes a fixed seat (11) and a bracket (12). The fixed seat (11) is fixedly installed on the bed body (1). The bracket (12) is installed on the top of the fixed seat (11). The sliding seat (20) is installed on the bracket (12) in a sliding fit manner; The top of the fixed seat (11) is not higher than the top surface of the workbench (2).

3. A long-tooth wide gear shaping machine tool according to claim 2, characterized in that: A linear guide rail (14) is longitudinally installed on one side of the bracket (12). A slider (15) is installed on the sliding seat (20). The slider (15) is slidably installed on the linear guide rail (14).

4. A long-tooth wide gear shaping machine tool according to claim 1, characterized in that: A transverse chute (21) is provided at the top of the sliding seat (20). The telescopic plate (30) is slidably installed in the chute (21). The limiting device (40) is installed at the top of the sliding seat (20); A longitudinal avoidance groove (13) is provided on the support (10) at the position corresponding to the telescopic plate (30).

5. The long-tooth wide gear shaper machining tool according to claim 4, characterized in that: The limiting device (40) is a hydraulic cylinder. The cylinder body (41) of the hydraulic cylinder is installed on the sliding seat (20). The piston (42) is located on the upper side of the telescopic plate (30). When the piston (42) moves down to abut against the telescopic plate (30), the telescopic plate (30) and the sliding seat (20) are limited and fixed.

6. A long-tooth wide gear shaping machine tool according to claim 1, characterized in that: One end of the telescopic plate (30) connected to the tool shaft (5) is provided with a through hole (31), and a bearing (32) is installed in the through hole (31); A connecting tool shaft (50) is installed at the lower end of the tool shaft (5). A tool mounting position (51) is provided on the connecting tool shaft (50). The tool mounting position (51) is used to mount a tool (6). A flange (52) is provided on the upper side of the tool mounting position (51). The upper end of the connecting tool shaft (50) is inserted into the tool shaft (5). The flange (52) and the lower end surface of the tool shaft (5) are connected by a connecting screw (53). An extension shaft (54) is provided at the lower end of the tool mounting position (51). The extension shaft (54) penetrates into the inner hole of the bearing (32). An end cover (34) is installed at the lower end of the extension shaft (54) through a positioning screw (35). The end cover (34) abuts against the inner ring of the bearing (32).

7. The long-tooth wide gear shaper according to claim 6, characterized in that: The connecting tool shaft (50) is also provided with a screw rod section (55) between the tool mounting position (51) and the extension shaft (54). The diameter of the screw rod section (55) is larger than the diameter of the extension shaft (54). A tool tightening nut (56) is installed on the screw rod section (55). The tool tightening nut (56) abuts against the tool (6) to lock the tool (6) on the connecting tool shaft (50).

8. A long-tooth wide gear shaping machine tool according to any one of claims 1-7, characterized in that: The workbench (2) of the machine tool body can reciprocate along the X2 direction on the bed (1), and the top of the workbench (2) can rotate; the column (3) of the machine tool body can reciprocate along the X1 direction on the bed (1); the tool spindle (5) can reciprocate along the Z direction, and the tool spindle (5) can also rotate.

9. The long-tooth wide gear shaper machining tool according to claim 8, wherein: The workbench (2) includes a support base (210) and a rotating base (220). An annular cavity (211) is provided on the upper side of the support base (210), and a rotating ring body (221) is provided on the lower side of the rotating base (220). The rotating ring body (221) is rotatably installed in the annular cavity (211). A worm gear (222) is installed inside the rotating ring body (221) located in the annular cavity (211), and a worm (212) is rotatably installed in the annular cavity (211). The worm (212) is in meshing transmission with the worm gear (222).

10. A processing method for long-tooth-width gear shaping, which adopts a long-tooth-width gear shaping machine tool as described in claim 8, is characterized in that: For machining an internal gear ring with a long tooth width, the machining method includes the following steps: Fix the workpiece (8) with the internal teeth to be machined to the workbench (2) through a fixture (7); When the column (3) moves away from the workbench (2), a feed motion is performed; When the workbench (2) moves towards the column (3), a tool withdrawal motion is performed; When the tool spindle (5) moves downward, the tooth grooves of the workpiece (8) are machined; When the workbench (2) rotates while carrying the workpiece (8), an intermittent gear cutting operation is performed on the workpiece; During the feed motion, the limiting device (40) releases the telescopic plate (30), and after the feed motion ends, the limiting device (40) locks the telescopic plate (30); When the tool spindle (5) reciprocates along the Z direction, the sliding seat (20) moves up and down following the tool spindle (5).

Images