A precise tool shank placement device

Abstract

The present invention discloses a precision tool bar placement device, comprising a base plate, a supporting plate, and a supporting rod. The base plate and the supporting plate are arranged parallel to each other, and a plurality of supporting rods are vertically fixed between the base plate and the supporting plate. The supporting plate is provided with a plurality of U-shaped openings, and the opening side of the U-shaped opening faces the side of the supporting plate, so that the placement device forms an opening for the tool bar to be placed sideways; the spacing between the base plate and the supporting plate forms a storage space for the tool bar to be vertically suspended. The tool bar is placed vertically in a static manner; the device is suitable for precision tool bars of various specifications, and is convenient for placement and use, which can avoid deformation of the tool bar and ensure high-quality production. The device solves the problem that various precision tool bars are placed horizontally and occupy space, which affects the 6S management of the production site and easily causes deformation of the tool bar. The device solves the problem that the precision tool bar is easily deformed when placed horizontally for a long time, and ensures high-quality production. The device is suitable for tool bars of various specifications, has strong versatility, is safe and reliable, and has low production cost.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical engineering, and specifically refers to a precise tool shank placement device. Background Art

[0002] The CNC hobbing machine is one of the most widely used machine tools in gear processing machine tools. It is used to machine spur gears, helical gears, herringbone gears, cylindrical gears, and worm gears by the generating method with a hob. In hobbing, the precision manufacturing and installation errors of the hob have a great influence on the gear processing accuracy. This requires us to reasonably use the hob in hobbing, control the gear processing errors caused by the hob during gear hobbing, and improve the gear processing quality. The hob is installed on the tool shank of the hobbing machine, so the daily storage and maintenance work of the tool shank itself is particularly important.

[0003] The tool shank is inserted into the hob. Usually, the tool shank and the hob fit tightly with a small clearance. This requires careful storage after the tool shank is removed. In the prior art, the guide rod is usually placed flat on the storage rack. Since one end of the tool shank has a large diameter, the rod part of the tool shank is in a suspended state when placed flat. Thus, under the action of gravity, the tool shank is prone to certain bending deformation. Secondly, since lubricating oil, butter, etc. for anti-wear, rust prevention, and protection are applied to the outer wall of the tool shank, when it is placed naked in the processing workshop, debris, dust, etc. flying in the workshop adhere to the surface of the tool shank, resulting in easy jamming when the tool shank is installed with the hob. Even if the installation is completed, abnormal wear of the interface will occur during subsequent use, resulting in a decrease in precision during hobbing.

[0004] In view of the above, it is necessary to propose a precise tool shank placement device to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the above technical problems and provide a precise tool shank placement device.

[0006] To achieve the above purpose, the present invention adopts the following technical scheme: A precise tool shank placement device includes a bottom plate, a supporting plate, and a support rod. The bottom plate and the supporting plate are arranged parallel to each other, and a plurality of support rods are vertically fixed between the bottom plate and the supporting plate. A plurality of U-shaped openings are provided on the supporting plate, and the opening side of the U-shaped opening faces the side of the supporting plate, so that the placement device forms an opening for the tool shank to be placed laterally. The distance between the bottom plate and the supporting plate forms a storage space for the tool shank to be vertically suspended.

[0007] Furthermore, it further includes a dust-proof device, and the dust-proof device includes a circumferential rotation mechanism, an axial movement mechanism, and a winding-out mechanism.

[0008] The circumferential rotation mechanism includes an open ring and a ring drive part. The open ring is provided with an inlet. The center of the open ring coincides with the center of the U-shaped opening. The ring drive part drives the open ring to rotate around the center. The axial movement mechanism is arranged on the open ring and is driven by the rotation of the open ring to rotate around the axis of the tool bar.

[0009] The axial movement mechanism includes a guide rod, a bidirectional cam groove rod, and a slider. The guide rod and the bidirectional cam groove rod are arranged parallel to the axis direction. The slider is simultaneously sleeved on the guide rod and the bidirectional cam groove rod and is driven by the rotation of the bidirectional cam groove rod to move axially.

[0010] The unwinding mechanism is arranged on the slider and is used for placing the packaging film and controlling the clamping force of the packaging film.

[0011] Furthermore, the circumferential rotation mechanism further includes a housing and a support gear. The open ring is rotatably connected in the housing. The housing is provided with a notch corresponding to the shape of the U-shaped opening. The notch is internally hollow and provided with an installation cavity for supporting the rotation of the open ring. A plurality of support gears are rotatably connected in the installation cavity, and the plurality of support gears surround the outside of the open ring to keep the center of the open ring concentric with the center of the U-shaped opening for rotation.

[0012] It further includes a reduction motor and a synchronous chain. The reduction motor is fixed outside the housing. The output end of the reduction motor simultaneously drives two synchronous chains to respectively connect and drive the rotation of two support gears. The outer wall of the open ring is provided with an open gear, and the support gear meshes with the open gear.

[0013] Furthermore, the axial movement mechanism further includes a synchronous shaft, an internal open gear ring, and an external synchronous gear. The synchronous shaft is rotatably connected to the side wall of the open ring, making the synchronous shaft parallel to the bidirectional cam groove rod, and the distance between the synchronous shaft and the bidirectional cam groove rod is greater than the opening width of the U-shaped opening. The internal open gear ring is arranged on the outer wall of the housing and its center is concentric with the center of the open ring. External synchronous gears are provided at the ends of the synchronous shaft and the bidirectional cam groove rod, and both external synchronous gears are internally meshed with the internal open gear ring.

[0014] Furthermore, the inside of the open ring is hollow and provided with a synchronous cavity. The ends of the synchronous shaft and the bidirectional cam groove rod both extend into the synchronous cavity and are provided with internal synchronous gears, and a transmission chain is sleeved on the two internal synchronous gears.

[0015] Furthermore, the bidirectional cam groove rod is provided with a first cam groove and a second cam groove around it. The lengths and the number of turns of the two cam grooves are the same, the circumferential directions are opposite, and the ends of the two cam grooves are connected to form a closed loop.

[0016] Further, the axial movement mechanism further includes a guide block. The slider includes a first sliding hole and a second sliding hole. The first sliding hole is slidably sleeved on the bidirectional cam groove rod, and the second sliding hole is slidably sleeved on the guide rod. The guide block is rotatably arranged inside the first sliding hole, and the end of the guide block is placed in the cam groove of the bidirectional cam groove rod. The first sliding hole is divided into a base portion and a cover portion along the axial direction, and side flanges for connection and fixation are provided on the base portion and the cover portion.

[0017] Further, the unwinding mechanism includes a supporting shaft frame and a pressing portion. The supporting shaft frame includes a bottom support plate and a shaft rod. The bottom support plate is fixedly connected to the side portion of the lower bottom surface of the slider, and the shaft rod is vertically fixed to the distal end of the bottom support plate. The pressing portion includes a pressing plate and a torsion spring. One side of the pressing plate is hinged to the slider, a torsion spring is arranged at the hinge shaft, and the other side of the pressing plate extends to the side portion of the shaft rod.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The tool bar is placed vertically and statically. This device is suitable for precision tool bars of multiple specifications, and the operation of placing and taking is convenient. It can avoid the deformation of the tool bar and escort high-quality production. It solves the problems that multiple precision tool bars placed horizontally occupy space, affect the 6S management of the production site, and are prone to tool bar deformation. It solves the problem that precision tool bars are prone to deformation when placed horizontally for a long time and escorts high-quality production. It is suitable for tool bars of multiple specifications, has strong versatility, is safe and reliable, and has a low manufacturing cost.

[0020] 2. The present invention is respectively provided with circumferential rotation mechanisms on the top and bottom sides of the storage space, which can drive the axial movement mechanism to revolve around the tool bar. During the revolution, the packaging film is wound around the tool bar by using the unwinding mechanism, so that dust, particles and other impurities can be avoided from adhering to the tool bar, and the storage quality of the tool bar is effectively improved.

[0021] 3. When the axial movement mechanism revolves around the tool bar, by using the meshing of the open inner gear ring and the outer synchronous gear, the synchronous shaft and the bidirectional cam groove rod can be simultaneously driven to rotate. During the rotation, the slider can be driven to move axially through the cam cooperation between the cam groove and the guide block, so as to control the automatic lifting of the packaging film, and further cooperate with the revolution to realize the winding and wrapping operation of the tool bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a precision tool bar placement device and a guide rod suspension of the present application;

[0023] Figure 2 It is an axonometric view of a precision tool bar placement device of the present application Figure 1 ;

[0024] Figure 3 It is an axonometric view of a precision tool bar placement device of the present applicationFigure 2 ;

[0025] Figure 4 This is an exploded view of a precise tool bar placement device of the present application;

[0026] Figure 5 This is a schematic structural view of the cross-section of the ring drive part;

[0027] Figure 6 This is a schematic structural view of the bidirectional cam groove rod;

[0028] Figure 7 This is an axonometric view of the axial movement mechanism Figure 1 ;

[0029] Figure 8 This is an axonometric view of the axial movement mechanism Figure 2 ;

[0030] In the figure: 1, bottom plate; 2, supporting plate; 3, support rod; 4, U-shaped opening; 5, storage space; 6, opening ring; 7, ring drive part; 8, placement opening; 9, guide rod; 10, bidirectional cam groove rod; 11, slider; 12, housing; 13, support gear; 14, notch; 15, installation cavity; 16, reduction motor; 17, synchronous chain; 18, opening gear; 19, synchronous shaft; 20, opening internal gear ring; 21, external synchronous gear; 22, synchronous cavity; 23, internal synchronous gear; 24, drive chain; 25, first cam groove; 26, second cam groove; 27, guide block; 28, first sliding hole; 29, second sliding hole; 30, base part; 31, cover part; 32, side flange; 33, bottom support plate; 34, shaft rod; 35, pressing plate. Specific embodiments

[0031] Next, in combination with the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0032] Embodiment 1:

[0033] A precise tool bar placement device, as Figure 1 shown, the device is integrally welded. It includes a bottom plate 1, a supporting plate 2, and a support rod 3. The bottom plate 1 and the supporting plate 2 are arranged parallel to each other, and a plurality of support rods 3 are vertically fixed between the bottom plate 1 and the supporting plate 2. A plurality of U-shaped openings 4 are provided on the supporting plate 2. In actual use, a soft gasket can also be provided on the upper side of the supporting plate 2. The opening side of the U-shaped opening 4 faces the side of the supporting plate 2, so that the placement device forms an opening for the tool bar to be placed laterally; the distance between the bottom plate 1 and the supporting plate 2 forms a storage space 5 for the tool bar to be vertically suspended.

[0034] When working, first place the device on the ground and fix it to the ground with screws. Next, place the soft gasket on the top of the support plate 2, and align the two sides of the U-shaped opening 4 with the top of the support rod 3. Next, lift the precision tool rod vertically with the larger short side facing upwards. Next, lift the precision tool rod vertically into the U-shaped opening 4, slowly lower the tool rod, or place it horizontally into the U-shaped opening 4 from the side opening. The tool rod has a large head rod with a larger diameter and a hob rod connected to the lower side. After being placed in, Figure 1 As shown on the right, the tool bar is placed vertically. The tool bar is placed vertically at rest. The device is suitable for precision tool bars of various specifications. It is easy to place and use, and can avoid deformation of the tool bar, thus ensuring high-quality production. It solves the problem that various precision tool bars are placed horizontally and take up space, which affects the 6S management of the production site and easily causes deformation of the tool bar. The advantage of this embodiment is that it solves the problem that the precision tool bar is prone to deformation due to long-term horizontal placement, thus ensuring high-quality production. It is suitable for tool bars of various specifications, has strong versatility, is safe and reliable, and has low production cost.

[0035] Embodiment 2:

[0036] In the first embodiment, the state of the hanging rod being suspended is realized, and the accuracy of the guide rod is effectively maintained. However, in the processing workshop, there are many metal debris or dust, and it is difficult to avoid debris or dust adhering to the surface of the tool rod, which is easy to wear the contact surface when it is used again. In this embodiment, further improvement is made, and a dust-proof device for automatically wrapping the packaging film around the guide rod is set in the storage space 5, and the dust-proof device includes a surrounding rotation mechanism, an axial movement mechanism, and a reeling mechanism;

[0037] Specifically, Figures 2-4 As shown, the surrounding rotation mechanism includes an open ring 6 and a ring driving part 7. The open ring 6 is provided with an insertion port 8. In actual use, the width of the insertion port 8 can be the same as the width of the opening, or slightly larger than the width of the opening, so that the guide rod does not collide with the inner wall of the open ring 6 when it is inserted. The center of the open ring 6 is arranged to coincide with the center of the U-shaped opening, and the ring driving part 7 drives the open ring 6 to rotate around the center. It can be understood that when the guide rod is moved transversely into the U-shaped opening 4, the insertion port 8 of the open ring 6 should be reset to the same direction as the opening of the U-shaped opening 4, such as Figure 2 As shown, this state can keep the opening of the side of the U-shaped opening open; if the method of hanging from the top is adopted, the direction of the insertion opening 8 of the open ring 6 does not need to be reset. In actual use, the ring driving part 7 can drive the open ring 6 to rotate, and the rotation makes the center of the open ring 6 and the center of the circle in the U-shaped opening 4 coincide with each other, so that the open ring 6 forms an effect of rotating around the knife rod.

[0038] like Figures 2-4As shown, in actual use, two sets of circumferential rotation mechanisms can be arranged in a mirror image on the upper and lower sides in the storage space 5. The axial movement mechanism is arranged on the opening ring 6 and is driven by the rotation of the opening ring 6 to rotate around the axis of the tool bar, forming the revolution effect of the axial movement mechanism around the tool bar; the axial movement mechanism includes a guide rod 9, a bidirectional cam groove rod 10, a synchronous shaft 19, and a slider 11. The guide rod 9, the bidirectional cam groove rod 10, and the synchronous shaft 19 are arranged parallel to the axis direction, and this axis is the axis of the tool bar after the tool bar is inserted. Moreover, both ends of the guide rod 9, the bidirectional cam groove rod 10, and the synchronous shaft 19 are connected to the opening rings 6 in the circumferential rotation mechanisms on the upper and lower sides. In actual rotation, the two opening rings 6 rotate synchronously, driving the axial movement mechanism to revolve around the tool bar.

[0039] Furthermore, the slider 11 is simultaneously sleeved on the guide rod 9 and the bidirectional cam groove rod 10, and the rotation of the bidirectional cam groove rod 10 drives the slider 11 to move in the axial direction. It can be understood that the bidirectional cam groove rod 10 and the synchronous shaft 19 are also rotatably connected to the side wall of the opening ring 6; thus, the bidirectional cam groove rod 10 and the synchronous shaft 19 can also rotate on their own axes. By using the self-rotation of the bidirectional cam groove rod 10 to drive the slider 11 to move axially, the packaging film moves up and down reciprocally and winds around the tool bar during the movement, isolating the tool bar from the outside world to achieve the purpose of protecting the tool bar. In this embodiment, the tool bar can be automatically wound up and down, and the use effect is good; specifically, the packaging film can be replaceably placed on the unwinding mechanism. The unwinding mechanism is arranged on the slider 11 and is used for placing the packaging film and controlling the clamping force of the packaging film. When the clamping force of the packaging film is large, the pulling force on the packaging film is large, and it winds tightly around the tool bar. On the contrary, when the clamping force is small, it winds loosely around the tool bar. Combined with the butter attached to the tool bar, the guide rod can also be well wrapped.

[0040] Furthermore, as Figure 4 , 5 shown, the circumferential rotation mechanism further includes a housing 12 and a support gear 13. The opening ring 6 is rotatably connected and arranged inside the housing 12. The housing 12 is provided with a notch 14 corresponding to the shape of the U-shaped opening 4. The notch 14 is internally hollow and provided with an installation cavity 15 for supporting the rotation of the opening ring 6. A plurality of support gears 13 are rotatably connected and arranged inside the installation cavity 15. The plurality of support gears 13 surround the outside of the opening ring 6 to keep the opening ring 6 rotating concentrically with the center of the U-shaped opening 4.

[0041] It further includes a reduction motor 16 and a synchronous chain 17. The reduction motor 16 is fixed outside the housing 12. The output end of the reduction motor 16 simultaneously drives two synchronous chains 17 to respectively connect and drive the rotation of the two support gears 13. The outer wall of the opening ring 6 is provided with an opening gear 18. The support gear 13 meshes with the opening gear 18. As Figure 5As shown in the figure, there are four support gears 13 in the figure, which are respectively engaged in four directions on the outer side of the opening ring 6. The two support gears 13 close to the side of the reduction motor 16 are driving wheels, and the other two are driven wheels. On the one hand, the four support gears 13 can maintain the coaxial and stable rotation of the opening ring 6. On the other hand, when the opening of the opening ring 6 passes through the driving wheels, the two driving wheels can also keep the opening ring 6 rotating continuously.

[0042] As Figure 3 , 7 As shown in the figure, the unwinding mechanism includes a supporting shaft frame and a pressing part; the supporting shaft frame includes a bottom supporting plate 33 and a shaft rod 34; the bottom supporting plate 33 is fixedly connected to the side part of the lower bottom surface of the slider 11, and the shaft rod 34 is vertically fixed at the end of the bottom supporting plate 33 away from the slider 11; the pressing part includes a pressing plate 35 and a torsion spring. One side of the pressing plate 35 is hinged to the slider 11, and a torsion spring is arranged at the hinge shaft. The other side of the pressing plate 35 extends to the side of the shaft rod 34. In actual use, the shaft roll of the packaging film can be placed into the shaft rod 34 from top to bottom, and then the pressing plate 35 is pressed on the outer side of the packaging film. The pressing force is provided to the pressing plate 35 by the torsion spring. In actual use, the torsion spring can be designed as an elastically adjustable structure, so that the pressure applied by the pressing plate 35 on the packaging film can be changed, and thus the tightness of the packaging film wrapped around the cutter bar can be changed.

[0043] Embodiment Three:

[0044] As a further improvement of Embodiment Two, specifically, the axial movement mechanism further includes an opening internal gear ring 20 and an external synchronous gear 21. As Figure 3 shown in the figure, the synchronous shaft 19 is rotatably connected to the side wall of the opening ring 6, making the synchronous shaft 19 parallel to the bidirectional cam groove rod 10, and the distance between the synchronous shaft 19 and the bidirectional cam groove rod 10 is greater than the opening width of the U-shaped opening. The opening internal gear ring 20 is arranged on the outer wall of the housing 12 and its center is concentric with the center of the opening ring 6. External synchronous gears 21 are provided at the ends of the synchronous shaft 19 and the bidirectional cam groove rod 10, and both of the two external synchronous gears 21 are internally meshed with the opening internal gear ring 20. It can be understood that when the opening ring 6 drives the bidirectional cam groove rod 10 to revolve, the bidirectional cam groove rod 10 will pass through the opening position of the opening internal gear ring 20. At this time, the external synchronous gear 21 at its end loses the meshing state with the opening internal gear ring 20, and then the bidirectional cam groove rod 10 cannot rotate self-rotatingly. In order to keep the bidirectional cam groove rod 10 rotating self-rotatingly continuously during the revolution process, a synchronous shaft 19 is provided, making the distance between the synchronous shaft 19 and the bidirectional cam groove rod 10 greater than the opening distance of the opening internal gear ring 20, so that one external synchronous gear 21 can be kept in the meshing state, and by linking the bidirectional cam groove rod 10 and the synchronous shaft 19 together, the continuous self-rotation of the bidirectional cam groove rod 10 can be maintained.

[0045] Specifically, as Figure 5As shown, the inside of the split ring 6 is hollow and provided with a synchronization chamber 22. The ends of the synchronization shaft 19 and the bidirectional cam groove rod 10 both extend into the synchronization chamber 22 and are provided with inner synchronization gears 23. A transmission chain 24 is sleeved on the two inner synchronization gears 23. Through the transmission chain 24, the synchronization shaft 19 and the bidirectional cam groove rod 10 can be kept rotating synchronously all the time. In actual use, since the split ring 6 is arc-shaped, in order to facilitate the arrangement of the transmission chain 24 in the arc-shaped synchronization chamber 22, an arc-shaped chain guide plate is arranged in the synchronization chamber 22. The chain guide plate has the function of turning the chain. In addition, a tension spring can be arranged on the chain guide plate, so as to realize the function of tensioning the transmission chain 24, thereby improving the transmission accuracy.

[0046] Embodiment 4:

[0047] The axial movement mechanism further includes a guide block 27. As Figure 7 shown, the slider 11 includes a first sliding hole 28 and a second sliding hole 29. The first sliding hole 28 is slidably sleeved on the bidirectional cam groove rod 10, and the second sliding hole 29 is slidably sleeved on the guide rod 9. The bidirectional cam groove rod 10 and the guide rod 9 both pass through the slider 11, so that the slider 11 can slide stably along the axis, and the driving force for its sliding comes from the self-rotation of the bidirectional cam groove rod 10. During self-rotation, the effect of axial movement of the slider 11 is achieved through the formed cam cooperation.

[0048] Specifically, as Figure 6 shown, the bidirectional cam groove rod 10 is provided with a first cam groove 25 and a second cam groove 26 around it. The lengths and the number of turns of the two cam grooves are the same, and the circumferential directions are opposite, and the ends of the two cam grooves are connected to form a closed loop. As Figure 8 shown, the guide block 27 is rotatably arranged inside the first sliding hole 28, and the end of the guide block 27 is placed in the cam groove of the bidirectional cam groove rod 10, so that the guide block 27 forms a cam cooperation with the first cam groove 25 and the second cam groove 26. In actual use, the first cam groove 25 can be designed as the groove for controlling the downward movement of the slider 11. On the contrary, the second cam groove 26 is the groove for controlling the upward movement of the slider 11. The two grooves are staggered and connected end to end, so that the guide block 27 can move cyclically in the two grooves; the first sliding hole 28 is divided into a base part 30 and a cover part 31 along the axial direction, and side flange 32 for connection and fixation is provided on the base part 30 and the cover part 31. The combined form of dividing the first sliding hole 28 into the base part 30 and the cover part 31 can facilitate the disassembly operation of the slider 11.

[0049] It can be understood that in some embodiments, the inner toothed ring 20 of the opening is fixedly arranged on the housing 12. Due to the different lengths of the tool shanks, when the axial movement mechanism moves, the slider 11 will only move upward after moving downward to the bottom end. When encountering a shorter tool shank, the axial movement mechanism winds and moves to the lower end of the tool shank to complete the wrapping. The opening ring 6 can be manually controlled to rotate in the reverse direction, so that the slider 11 can directly move upward to continue winding.

[0050] In some other embodiments, the inner toothed ring 20 of the opening is arranged to be controllable to rotate around the axis; when encountering a shorter tool shank, the opening ring 6 can be controlled to pause rotation, and instead, the inner toothed ring 20 of the opening is controlled to rotate. At this time, the axial movement mechanism stops revolving, and only the inner toothed ring 20 drives the synchronous shaft 19 and the bidirectional cam groove rod 10 to rotate. At this time, the slider 11 can be independently controlled to move up and down, so that the position of the slider 11 can be conveniently controlled.

[0051] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes an equivalent substitution or change, and should be covered by the protection scope of the present invention.

Claims

1. A precise tool shank placement device, characterized in that, It includes a bottom plate (1), a supporting plate (2), and a supporting rod (3). The bottom plate (1) and the supporting plate (2) are arranged parallel to each other. A plurality of supporting rods (3) are vertically fixed between the bottom plate (1) and the supporting plate (2). A plurality of U-shaped openings (4) are provided on the supporting plate (2). The opening side of the U-shaped opening (4) faces the side of the supporting plate (2), so that the placing device forms an opening for the tool bar to be laterally inserted. The distance between the bottom plate (1) and the supporting plate (2) forms a storage space (5) for the tool bar to be vertically suspended. It further includes a dust-proof device. The dust-proof device includes a circumferential rotation mechanism, an axial movement mechanism, and a film unwinding mechanism. The circumferential rotation mechanism includes an open ring (6) and a ring driving part (7). The open ring (6) is provided with a placement opening (8). The center of the open ring (6) coincides with the center of the U-shaped opening. The ring driving part (7) drives the open ring (6) to rotate around the center. The axial movement mechanism is arranged on the open ring (6) and is driven by the rotation of the open ring (6) to rotate around the axis of the tool bar. The axial movement mechanism includes a guide rod (9), a bidirectional cam groove rod (10), and a slider (11). The guide rod (9) and the bidirectional cam groove rod (10) are arranged parallel to the axis direction. The slider (11) is simultaneously sleeved on the guide rod (9) and the bidirectional cam groove rod (10), and the rotation of the bidirectional cam groove rod (10) drives the slider (11) to move in the axial direction. The film unwinding mechanism is arranged on the slider (11) and is used for placing the packaging film and controlling the clamping force of the packaging film. The circumferential rotation mechanism further includes a housing (12) and a support gear (13). The open ring (6) is rotatably connected in the housing (12). The housing (12) is provided with a notch (14) corresponding to the shape of the U-shaped opening (4). The notch (14) is internally hollow and provided with an installation cavity (15) for supporting the rotation of the open ring (6). A plurality of support gears (13) are rotatably connected in the installation cavity (15). The plurality of support gears (13) surround the outside of the open ring (6) to keep the center of the open ring (6) and the center of the U-shaped opening (4) concentric during rotation. It further includes a reduction motor (16) and a synchronous chain (17). The reduction motor (16) is fixed outside the housing (12). The output end of the reduction motor (16) simultaneously drives two synchronous chains (17) to respectively connect and drive the rotation of two support gears (13). An open gear (18) is provided on the outer wall of the open ring (6), and the support gear (13) meshes with the open gear (18). The axial movement mechanism further includes a synchronous shaft (19), an open internal gear ring (20), and an external synchronous gear (21). The synchronous shaft (19) is rotatably connected to the side wall of the open ring (6), making the synchronous shaft (19) parallel to the bidirectional cam groove rod (10), and the distance between the synchronous shaft (19) and the bidirectional cam groove rod (10) is greater than the opening width of the U-shaped opening. The open internal gear ring (20) is arranged on the outer wall of the housing (12) and its center is concentric with the center of the open ring (6). External synchronous gears (21) are provided at the ends of both the synchronous shaft (19) and the bidirectional cam groove rod (10), and both external synchronous gears (21) are internally meshed with the open internal gear ring (20). The interior of the open ring (6) is hollow and provided with a synchronous cavity (22). Internal synchronous gears (23) are provided at the ends of both the synchronous shaft (19) and the bidirectional cam groove rod (10) extending into the synchronous cavity (22). A transmission chain (24) is sleeved on the two internal synchronous gears (23).

2. The precision tool shank placement device according to claim 1, characterized in that The bidirectional cam groove rod (10) is circumferentially provided with a first cam groove (25) and a second cam groove (26). The lengths and the number of circumferential turns of the two cam grooves are the same, and the circumferential directions are opposite. The ends of the two cam grooves are connected to form a closed loop.

3. A precision tool shank placement device according to claim 1 or 2, characterized in that, The axial movement mechanism further includes a guide block (27). The slider (11) includes a first sliding hole (28) and a second sliding hole (29). The first sliding hole (28) is slidably sleeved on the bidirectional cam groove rod (10), and the second sliding hole (29) is slidably sleeved on the guide rod (9). The guide block (27) is rotatably arranged inside the first sliding hole (28), and the end of the guide block (27) is placed in the cam groove of the bidirectional cam groove rod (10). The first sliding hole (28) is axially divided into a base part (30) and a cover part (31), and side flanges (32) for connection and fixation are provided on the base part (30) and the cover part (31).

4. The precision tool shank placement device according to claim 1, characterized in that, The unwinding mechanism includes a supporting shaft frame and a pressing part. The supporting shaft frame includes a bottom support plate (33) and a shaft rod (34). The bottom support plate (33) is fixedly connected to the lower bottom side part of the slider (11), and the shaft rod (34) is vertically fixed at the distal end of the bottom support plate (33). The pressing part includes a pressing plate (35) and a torsion spring. One side of the pressing plate (35) is hinged to the slider (11), and a torsion spring is arranged at the hinge shaft. The other side of the pressing plate (35) extends to the side part of the shaft rod (34).

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