A machining center for machining helical non-circular gears

Abstract

The present application relates to a machining center for machining helical non-circular gears, which includes a frame, a clamping seat and a clamping assembly, wherein the clamping seat is provided with a through hole for the helical non-circular gear sleeve to pass through, and the clamping assembly includes a clamping block and a bolt, wherein the clamping block is in an inverted L shape, the clamping block passes through the mounting hole of the helical non-circular gear, the clamping block abuts against the upper end surface of the helical non-circular gear, and the bolt passes through the clamping block and is threadedly connected to the clamping seat. The present application has the effect of reducing the deformation of the tooth top of the helical non-circular gear during machining in the machining center.

Description

Technical Field

[0001] The present application relates to the field of machining centers, and in particular to a machining center for machining helical non-circular gears. Background Art

[0002] At present, a Chinese utility model patent with publication number CN218951649 discloses a sock toe sewing device with variable sock toe sewing length; it is known that a sock knitting machine is required in the current sock production process, and a helical non-circular gear (i.e., the sewing gear in this application) is used in the device, and a sewing gear disc is installed on the helical non-circular gear, and the sewing gear disc is used to sew the sock toes, so the helical non-circular gear is an extremely important component in the sock knitting machine.

[0003] refer to Figure 1 The side wall of the helical non-circular gear (5) is provided with a flared opening (51) for positioning with a hosiery machine, the end surface of the helical non-circular gear (5) is provided with a plurality of mounting holes (52) for mounting on the hosiery machine, and the helical non-circular gear (5) is also provided with a sleeve (53) for adapting to a driving shaft of the hosiery machine.

[0004] The end face of the pipe sleeve is milled by a machining center to fit the slotted toothed disc, while the conventional clamp of the machining center directly clamps the outer wall of the helical non-circular gear (5), which easily causes deformation of the tooth top of the helical non-circular gear (5), resulting in a significant decrease in the meshing smoothness of the helical non-circular gear (5). Summary of the invention

[0005] In order to reduce the tooth top deformation of the helical non-circular gear during machining in a machining center, the present application provides a machining center for machining the helical non-circular gear.

[0006] The present application provides a machining center for machining helical non-circular gears, which adopts the following technical solution:

[0007] A machining center for machining helical non-circular gears comprises a frame, a clamping seat and a clamping assembly, wherein the clamping seat is provided with a through hole for the helical non-circular gear sleeve to pass through, and the clamping assembly comprises a clamping block and a bolt, wherein the clamping block is in an inverted L-shape, the clamping block passes through the mounting hole of the helical non-circular gear, the clamping block abuts against the upper end surface of the helical non-circular gear, and the bolt passes through the clamping block and is threadedly connected to the clamping seat.

[0008] By adopting the above technical solution, the staff first passes the sleeve of the helical non-circular gear into the through hole of the clamping seat, and then passes the inverted L-shaped clamping block through the mounting hole of the helical non-circular gear. The clamping block is fixed to the clamping seat by bolts. The clamping block presses the helical non-circular gear against the clamping seat, which is convenient for the subsequent machining center to perform milling processing on the equipment.

[0009] Optionally, a positioning assembly for positioning the helical non-circular gear is provided on the clamping seat, and the positioning assembly includes a positioning plate, five positioning posts, an arc strip and a control member, the positioning plate is coaxially arranged with the through hole, the positioning plate is rotatably connected to the clamping seat, the positioning plate is provided with five arc grooves, the arc grooves gradually approach the center of the positioning plate along the length direction of the arc grooves, the clamping seat is provided with five adapting grooves, the length direction of the adapting grooves passes through the through hole, the five positioning posts correspond to the five arc grooves one by one, the positioning posts are located in the arc grooves, the five positioning posts correspond to the five adapting grooves one by one, the positioning posts are located in the adapting grooves, the arc strip forms an open circular arc, the positioning post is used to drive the adjustment of the diameter of the arc formed by the arc strip, the arc strip is used to abut against the outer side wall of the sleeve of the helical non-circular gear, and the control member is used to drive the positioning plate to rotate.

[0010] By adopting the above technical scheme, in order to facilitate the sleeve of the helical non-circular gear to enter the through hole, the diameter of the through hole will be larger than the diameter of the sleeve of the helical non-circular gear. The staff can control the positioning assembly through the control part, and the positioning assembly accurately positions the helical non-circular gear to reduce the need for tool alignment in the machining center; when the sleeve of the helical non-circular gear penetrates into the through hole, the control part drives the positioning plate to rotate, and the arc groove on the positioning plate and the arc groove on the clamping seat are staggered to form a space for accommodating the positioning column, and the positioning column is gradually approached to the sleeve of the helical non-circular gear through the rotation of the positioning plate, and the five positioning columns drive the arc bars to approach, and the diameter of the arc formed by the arc bars gradually decreases until the inner side wall of the arc bar abuts against the inner side wall of the helical non-circular gear, and the positioning assembly makes the helical non-circular gear and the through hole of the clamping seat coaxially arranged, thereby realizing the precise positioning of the helical non-circular gear.

[0011] Optionally, the positioning assembly also includes a mounting wheel, three mating wheels and an adjusting wheel, and the mounting wheel, three mating wheels and the adjusting wheel correspond one-to-one to the five positioning columns respectively, one end of the arc strip is arranged on the mounting wheel, the mating wheel abuts against the arc strip, and the arc strip is slidably connected to the adjusting wheel.

[0012] By adopting the above technical solution, one end of the arc bar is arranged on the mounting wheel, and the matching wheel is used to guide the arc bar. Since the diameter of the arc formed by the arc bar will change, the staff can slide the arc bar to change the position of the adjusting wheel on the arc bar, so that the arc bar is tightened, and the arc bar abuts against the outer wall of the sleeve of the helical non-circular gear. The contact area between the arc bar and the sleeve of the helical non-circular gear is increased, thereby improving the surface quality of the sleeve of the helical non-circular gear.

[0013] Optionally, a flexible rack is provided on the side of the arc-shaped bar facing the mating wheel, and the adjusting wheel is provided with a plurality of tooth grooves, and the tooth grooves are used to engage with the flexible rack.

[0014] By adopting the above technical solution, the flexible rack on the arc bar can be adjusted along the arc formed by the arc bar. The staff can rotate the adjusting wheel so that the tooth groove on the adjusting wheel engages with the flexible rack, and the flexible rack drives the arc bar to move, so that the arc bar is tightened and abuts against the sleeve of the helical non-circular gear.

[0015] Optionally, the positioning assembly also includes a driving gear and a driving rack, the driving gear is coaxially arranged with the adjusting wheel, the driving gear is arranged on a positioning column corresponding to the adjusting wheel, the driving gear can drive the adjusting wheel to rotate via the positioning column, the length direction of the driving rack is parallel to the length direction of the adapter groove corresponding to the positioning column, the driving rack is arranged on the clamping seat, and the driving gear is meshed with the driving rack.

[0016] By adopting the above technical solution, when the staff drives the positioning plate to rotate through the control part, the rotation of the positioning plate drives the positioning column to slide along the length direction of the adapter groove, and the positioning column causes the driving gear to slide relative to the adapter groove, driving the meshing of the rack and the driving gear to cause the driving gear to rotate, and the rotation of the driving gear drives the corresponding positioning column to rotate, and the positioning column drives the adjusting wheel to rotate, and the tooth groove on the adjusting wheel meshes with the flexible rack on the arc bar, so that the arc bar is tightened, and the arc bar better abuts against the outer wall of the sleeve of the helical non-circular gear, and the diameter of the arc formed by the arc bar can be controlled without the need for additional operation by the staff.

[0017] Optionally, the control component includes a control rack and a control gear ring, the control gear ring is arranged on the outer wall of the positioning plate, the control rack is slidably connected to the clamping seat, and the control gear ring is meshed with the control rack.

[0018] By adopting the above technical solution, when the staff needs to drive the positioning plate to rotate, the staff can control the rack by sliding, and the control rack drives the control gear ring to rotate, and the control gear ring drives the positioning plate to rotate. The control component has a simple structure, and the sliding of the control rack is converted into the rotation of the control gear ring, which improves the staff's controllability.

[0019] Optionally, the control component further includes a locking block and a locking spring. A slot is provided on the control rack. The locking block is slidably connected to the clamping seat. The locking spring is used to keep the locking block engaged in the slot.

[0020] By adopting the above technical solution, when it is necessary to make the positioning column approach the axial direction of the helical non-circular gear, the staff drives the control gear ring to rotate by controlling the rack, and the control gear ring drives the positioning plate to rotate, and the arc groove on the positioning plate and the adapter groove on the clamping seat drive the positioning column to move until the arc piece abuts against the sleeve of the helical non-circular gear. At this time, the locking block is clamped into the slot by the elastic force of the locking spring, the control rack cannot move, and the positioning plate cannot rotate, which ensures that the position of the arc piece remains unchanged, the positioning effect is better, and the displacement during the processing of the helical non-circular gear is reduced.

[0021] Optionally, the slot is provided with a guiding bevel, and when the positioning plate is driven to rotate by the control member to make the positioning column approach the helical non-circular gear sleeve, the guiding bevel guides the locking block to disengage from the slot.

[0022] By adopting the above technical solution, when the staff makes the control rack drive the control ring gear, the control ring gear drives the positioning plate to rotate, and the arc groove and the adapter groove on the positioning plate drive the positioning column to move toward the axis direction of the helical non-circular gear. The guiding inclined surface on the control rack slot enables the locking block to overcome the elastic force of the locking spring and move in the direction away from the slot, and then enter the adjacent slot under the action of the elastic force of the locking spring. When the staff moves the control rack, there is no need to keep the locking block away from the slot for a long time.

[0023] Optionally, the control member further comprises a return spring, and when the locking block remains disengaged from the slot, the return spring is used to drive the control rack to move.

[0024] By adopting the above technical scheme, when the helical non-circular gear is processed, the staff can hold the locking block so that the locking block overcomes the elastic force of the locking spring and stays away from the control rack. The control rack moves under the action of the reset spring, and the control rack drives the control gear ring to rotate. The electric positioning plate of the control gear ring rotates, and the positioning column moves in the direction away from the axis of the helical non-circular gear. The arc piece is separated from the outer wall of the helical non-circular gear sleeve. The control component structure is more reasonable, easy to operate, and improves work efficiency.

[0025] Optionally, the clamping seat is provided with a cavity, and the positioning plate and the control component are both located in the cavity.

[0026] By adopting the above technical solution, when the machining center performs milling operations on helical non-circular gears, a large amount of metal chips will fly. The positioning plate and the control part are located in the cavity, which reduces the impact of the metal chips and increases the service life of the clamping seat.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The clamping block is installed on the clamping seat through the mounting hole of the helical non-circular gear. It has a simple structure and does not need to contact the tooth top of the helical non-circular gear, thereby improving the production quality of the helical non-circular gear.

[0029] 2. The positioning assembly is used to keep the helical non-circular gear coaxial with the through hole, thereby improving the positioning accuracy of the helical non-circular gear;

[0030] 3. The control part is used by the staff to control the rotation of the positioning plate, so as to realize the clamping of the helical non-circular gear sleeve by the arc bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a helical non-circular gear.

[0032] Figure 2 It is a machining center used for machining helical non-circular gears.

[0033] Figure 3 yes Figure 2 Schematic diagram of the structure of the middle clamping seat.

[0034] Figure 4 yes Figure 3 Cross-sectional view of the middle clamping seat.

[0035] Figure 5 yes Figure 3 The schematic diagram on the other side of the middle clamping seat is used to show the matching relationship between the positioning column and the clamping seat.

[0036] Figure 6 It is a cross-sectional view of the clamping seat, which is used to show the matching relationship between the driving gear and the driving rack placed in the cavity.

[0037] Figure 7 It is a schematic diagram used to show the structure of the control components.

[0038] Reference numerals: 1, frame; 2, clamping seat; 21, through hole; 22, cavity; 23, adapter groove; 24, placement cavity; 3, clamping assembly; 31, clamping block; 32, bolt; 33, top block; 4, positioning assembly; 41, positioning plate; 411, arc groove; 42, positioning column; 43, arc strip; 431, flexible rack; 44, control member; 441, control rack; 442, control gear ring; 443. Locking block; 444. Locking spring; 445. Reset spring; 446. Push rod; 447. Slot; 448. Guide ramp; 449. Pull rod; 45. Mounting wheel; 46. Matching wheel; 461. Avoidance groove; 47. Adjusting wheel; 471. Slot; 48. Driving gear; 49. Driving rack; 5. Helical non-circular gear; 51. Flaring; 52. Mounting hole; 53. Sleeve. DETAILED DESCRIPTION

[0039] The following is combined with Figure 2-5 This application is described in further detail.

[0040] The present application embodiment discloses a machining center for machining helical non-circular gears. Figure 2 and Figure 3 A machining center for machining helical non-circular gears includes a frame 1, a clamping seat 2, two clamping assemblies 3 and two positioning assemblies 4. The clamping seat 2 is horizontally arranged and fixedly arranged in a machining bin of the frame 1. The clamping seat 2 is provided with two through holes 21, and the two through holes 21 are distributed along the length direction of the clamping seat 2. The two clamping assemblies 3 correspond to the two through holes 21 one by one. The clamping assemblies 3 are used to clamp the helical non-circular gears 5. The two positioning assemblies 4 correspond to the two through holes 21 one by one. The positioning assemblies 4 are used to keep the axis of the helical non-circular gears 5 coaxial with the through holes 21.

[0041] refer to Figure 4 and Figure 5 A cavity 22 is provided in the clamping seat 2, and the cavity 22 is communicated with the two through holes 21. The positioning assembly 4 includes a positioning plate 41, five positioning columns 42, an arc strip 43, a control member 44, a mounting wheel 45, three matching wheels 46, an adjusting wheel 47, a driving gear 48 and a driving rack 49. The positioning plate 41 is coaxially arranged with the through hole 21, the positioning plate 41 is located in the cavity 22, and the positioning plate 41 is rotatably connected to the inner side wall of the cavity 22. Five arc grooves 411 are provided on the positioning plate 41, and the five arc grooves 411 are evenly distributed along the circumferential direction of the axis of the positioning plate 41. The arc grooves 411 are arranged along the arc grooves 411. The length direction gradually approaches the axial direction of the positioning disk 41, the arc groove 411 penetrates the positioning disk 41, and the lower end surface of the clamping seat 2 is provided with five adapter grooves 23, and the five adapter grooves 23 are evenly distributed along the circumference of the axis of the through hole 21. The five adapter grooves 23 correspond to the five arc grooves 411 one by one, and the length direction of the adapter groove 23 is parallel to the radial direction of the through hole 21. The adapter groove 23 is connected with the cavity 22, and the five positioning columns 42 correspond to the five arc grooves 411 one by one. The positioning column 42 is vertically arranged, and the upper end surface of the positioning column 42 is located in the arc groove 411, and the positioning column 42 is slidably connected in the adapter groove 23.

[0042] refer to Figure 4 and Figure 5The mounting wheel 45 is coaxially arranged with one of the positioning posts 42, the mounting wheel 45 is fixedly arranged on the positioning post 42, the adjusting wheel 47 corresponds to the positioning post 42 adjacent to the mounting wheel 45, the adjusting wheel 47 is coaxially arranged with the corresponding positioning post 42, the remaining three matching wheels 46 correspond to the remaining three positioning posts 42, the matching wheels 46 are coaxially arranged with the corresponding positioning posts 42, the matching wheels 46 are rotatably connected to the positioning posts 42, the arc strip 43 is horizontally arranged, the arc strip 43 is in an arc shape, one end of the arc strip 43 is fixedly arranged on the side wall of the mounting wheel 45, the matching wheels 46 and the adjusting wheels are coaxially arranged with the corresponding positioning posts 42, and the matching wheels 46 are rotatably connected to the positioning posts 42. The segment wheel 47 abuts against the outer side wall of the arc-shaped bar 43, a flexible rack 431 is fixedly provided on the arc-shaped bar 43, the flexible rack 431 is located on the outer side wall of the arc-shaped bar 43, the length direction of the flexible rack 431 is parallel to the length direction of the arc-shaped bar 43, the three mating wheels 46 are provided with avoidance grooves 461, the avoidance grooves 461 are for the flexible rack 431 to pass through, a plurality of latching grooves 471 are provided on the adjusting wheel 47, the plurality of latching grooves 471 are evenly distributed circumferentially along the axis of the adjusting wheel 47, and the latching grooves 471 are meshed with the flexible rack 431.

[0043] refer to Figure 4 and Figure 6 The inner top wall of the cavity 22 is provided with a placement cavity 24, and the driving gear 48 and the driving rack 49 are both located in the placement cavity 24. The driving gear 48 is coaxially arranged with the positioning column 42 corresponding to the adjusting wheel 47, and the driving gear 48 is fixedly arranged on the upper end surface of the corresponding positioning column 42. The length direction of the driving rack 49 is parallel to the length direction of the adapting groove 23, and the driving rack 49 is meshed with the driving gear 48. The meshing of the driving rack 49 and the driving gear 48 causes the driving gear 48 to rotate, and the rotation of the driving gear 48 drives the corresponding positioning column 42 to rotate, and the positioning column 42 drives the adjusting wheel 47 to rotate.

[0044] refer to Figure 4 and Figure 7 The control member 44 includes a control rack 441, two control gear rings 442, a locking block 443, a locking spring 444 and a return spring 445. The two control gear rings 442 correspond to the two positioning components 4. The control gear rings 442 are coaxially arranged with the positioning disk 41. The control gear rings 442 are fixedly arranged on the outer wall of the positioning disk 41. The length direction of the control rack 441 is parallel to the length direction of the clamping seat 2. The control rack 441 is slidably connected to the inner wall of the cavity 22 along the length direction of the clamping seat 2. The control rack 441 is meshed with the control gear ring 442. The return spring 445 is located in the cavity 22. The length direction of the return spring 445 is parallel to the length direction of the control rack 441. One end of the return spring 445 is fixedly arranged on one end of the control rack 441, and the other end of the return spring 445 is fixedly arranged on the inner wall of the cavity 22. A lever 446 is arranged on the control rack 441, and the lever 446 passes through the cavity 22.

[0045] refer to Figure 4 and Figure 7 A plurality of slots 447 are provided at one end of the control rack 441 away from the control gear ring 442, and the plurality of slots 447 are evenly distributed along the length direction of the control rack 441; a guide slope 448 is provided between the end of the control rack 441 away from the control gear ring 442 and the inner side wall of the slot 447 away from the reset spring 445; the locking block 443 is slidably connected to the clamping seat 2 along the width direction of the clamping seat 2, and the locking block 443 is used to be clamped in the slot 447; a pulling rod 449 is fixedly provided at one end of the locking block 443 away from the slot 447, and the length direction of the pulling rod 449 is parallel to the width direction of the clamping seat 2; the locking spring 444 is located in the cavity 22, and the length direction of the locking spring 444 is parallel to the length direction of the pulling rod 449; one end of the locking spring 444 is fixedly provided on the locking block 443, and the other end of the locking spring 444 is fixedly provided on the inner side wall of the cavity 22.

[0046] refer to Figure 3 and Figure 7 The clamping assembly 3 includes three clamping blocks 31, three bolts 32 and a top block 33. The top block 33 is fixedly arranged on the upper end surface of the clamping seat 2. The top block 33 is used to engage with the flared opening 51 of the helical non-circular gear 5. The three clamping blocks 31 are evenly distributed along the circumferential direction of the axis of the through hole 21. The clamping blocks 31 are in an inverted L shape. The clamping blocks 31 pass through the mounting holes 52 of the helical non-circular gear 5. The clamping blocks 31 abut against the upper end surface of the helical non-circular gear 5. The three bolts 32 correspond to the three clamping blocks 31 one by one. The bolts 32 are vertically arranged. The bolts 32 pass through the clamping blocks 31 and are threadedly connected to the upper end surface of the clamping seat 2.

[0047] The implementation principle of a machining center for machining helical non-circular gears in an embodiment of the present application is as follows: the staff first inserts the sleeve 53 of the helical non-circular gear 5 into the through hole 21, and then drives the control rack 441 to move through the lever 446, and the control rack 441 overcomes the elastic force of the reset spring 445, drives the control gear ring 442 to rotate, and the positioning of the control rack 441 is achieved through the cooperation between the locking block 443 and the slot 447, and the control gear ring 442 drives the positioning plate 41 to rotate, and the arc groove on the positioning plate 41 cooperates with the adapter groove 23 on the clamping seat 2 to realize that the five positioning columns 42 gradually approach the sleeve 53 of the helical non-circular gear 5.

[0048] When the positioning column 42 approaches, it drives the installation wheel 45, the matching wheel 46 and the adjusting wheel 47 to move, thereby driving the arc bar 43 to move. The adjusting wheel 47 rotates by driving the gear 48 and the driving rack 49. The flexible rack 431 on the arc bar 43 cooperates with the tooth groove 471 of the adjusting wheel 47, and the arc rack abuts against the outer wall of the sleeve 53 of the helical non-circular gear 5, realizing the coaxiality of the sleeve of the helical non-circular gear 5 and the through hole 21. After that, the staff fixes the clamping block 31 to the upper end face of the clamping seat 2 by bolts 32 to complete the fixation of the helical non-circular gear 5.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A machining center for machining helical non-circular gears, characterized in that: The invention comprises a frame (1), a clamping seat (2) and a clamping assembly (3); the clamping seat (2) is provided with a through hole (21) for a sleeve (53) of a helical non-circular gear (5) to pass through; the clamping assembly (3) comprises a clamping block (31) and a bolt (32); the clamping block (31) is in an inverted L-shape; the clamping block (31) passes through the mounting hole (52) of the helical non-circular gear (5); the clamping block (31) abuts against the upper end surface of the helical non-circular gear (5); the bolt (32) passes through the clamping block (31) and is threadedly connected to the clamping seat (2); a positioning member for positioning the helical non-circular gear (5) is provided on the clamping seat (2); The positioning assembly (4) comprises a positioning plate (41), five positioning columns (42), an arc strip (43) and a control member (44); the positioning plate (41) is coaxially arranged with the through hole (21); the positioning plate (41) is rotatably connected to the clamping seat (2); the positioning plate (41) is provided with five arc grooves (411); the arc grooves (411) gradually approach the center of the positioning plate (41) along the length direction of the arc grooves (411); the clamping seat (2) is provided with five adapter grooves (23); the length direction of the adapter grooves (23) passes through the through hole (21); the five positioning columns The positioning column (42) corresponds to the five arc grooves (411) one by one, the positioning column (42) is located in the arc groove (411), the five positioning columns (42) correspond to the five matching grooves (23) one by one, the positioning column (42) is located in the matching groove (23), the arc strip (43) forms an open arc shape, the positioning column (42) is used to drive the arc diameter adjustment formed by the arc strip (43), the arc strip (43) is used to abut against the outer wall of the sleeve (53) of the helical non-circular gear (5), and the control member (44) is used to drive the positioning plate (41) to rotate; the positioning assembly (4) also includes a mounting wheel (45), three matching a matching wheel (46) and an adjusting wheel (47), wherein the mounting wheel (45), the three matching wheels (46) and the adjusting wheel (47) correspond to the five positioning posts (42) respectively, one end of the arc strip (43) is arranged on the mounting wheel (45), the matching wheel (46) abuts against the arc strip (43), and the arc strip (43) is slidably connected to the adjusting wheel (47); a flexible rack (431) is arranged on a side of the arc strip (43) facing the matching wheel (46), and the adjusting wheel (47) is provided with a plurality of latching tooth grooves (471), and the latching tooth grooves (471) are used to mesh with the flexible rack (431);The positioning assembly (4) further comprises a driving gear (48) and a driving rack (49), wherein the driving gear (48) is coaxially arranged with the adjusting wheel (47), the driving gear (48) is arranged on a positioning column (42) corresponding to the adjusting wheel (47), the driving gear (48) can drive the adjusting wheel (47) to rotate via the positioning column (42), the length direction of the driving rack (49) is parallel to the length direction of the adapting groove (23) corresponding to the positioning column (42), the driving rack (49) is arranged on the clamping seat (2), and the driving gear (48) meshes with the driving rack (49). ; 2. A machining center for machining helical non-circular gears according to claim 1, characterized in that: The control member (44) comprises a control rack (441) and a control gear ring (442); the control gear ring (442) is arranged on the outer wall of the positioning plate (41); the control rack (441) is slidably connected to the clamping seat (2); and the control gear ring (442) is meshed with the control rack (441).

3. A machining center for machining helical non-circular gears according to claim 2, characterized in that: The control member (44) further comprises a locking block (443) and a locking spring (444); a slot (447) is provided on the control rack (441); the locking block (443) is slidably connected to the clamping seat (2); and the locking spring (444) is used to keep the locking block (443) engaged in the slot (447).

4. A machining center for machining helical non-circular gears according to claim 3, characterized in that: The slot (447) is provided with a guiding inclined surface (448), and when the positioning plate (41) is driven to rotate by the control member (44) so ​​that the positioning column (42) approaches the sleeve of the helical non-circular gear (5), the guiding inclined surface (448) guides the locking block (443) to disengage from the slot (447).

5. A machining center for machining helical non-circular gears according to claim 4, characterized in that: The control member (44) further comprises a return spring (445), and when the locking block (443) remains disengaged from the locking slot (447), the return spring (445) is used to drive the control rack (441) to move.

6. A machining center for machining helical non-circular gears according to claim 1, characterized in that: The clamping seat (2) is provided with a cavity (22), and the positioning plate (41) and the control component (44) are both located in the cavity (22).

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