Fastener chamfering apparatus

Abstract

The present application relates to the technical field of fastener chamfering, and provides a fastener chamfering device, which comprises a chamfering device body, a multi-axis driving device is arranged on one side of the chamfering device body, a chamfering cutter is arranged on the multi-axis driving device, the multi-axis driving device moves laterally on the chamfering device body, and the device further comprises a fixed supporting cylinder, a rotating support and a clamping rotating cylinder, the fixed supporting cylinder is arranged on the other side of the chamfering device body, a conveying rack is arranged between the fixed supporting cylinder and the chamfering cutter, a transmission belt structure is arranged in the conveying rack, a plurality of rotating supports are arranged on the transmission belt structure along the transmission path of the transmission belt structure, the transmission belt structure drives the plurality of rotating supports to be sequentially corresponding to the center points of the fixed supporting cylinder, and the clamping rotating cylinder is rotatably connected in each rotating support. Through the above technical scheme, the problem that the fastener chamfering device in the prior art is difficult to uniformly and quickly clamp the continuously moving sheet-shaped or rod-shaped fastener raw materials is solved.

Description

Technical Field

[0001] This invention relates to the field of fastener chamfering technology, and more specifically, to a fastener chamfering device. Background Technology

[0002] Fasteners are general-purpose mechanical components widely used in various fields involving metal steel structures, such as mechanical equipment, automotive industry, construction and steel structure, and rail transportation. They mainly perform multiple functions such as connecting, fastening, positioning, and sealing the objects being used. Fasteners come in many types, including threaded fasteners, mainly represented by bolts, nuts, and screws, as well as non-threaded fasteners, such as washers, pins, and retaining rings for connection and positioning. There are also special fasteners, such as plate-shaped fasteners and bent fasteners that correspond to the shape of the product being installed, used for fixing the product. Therefore, the types of fasteners in the existing technology vary greatly depending on the actual usage requirements.

[0003] In existing technologies, it is common practice to chamfer the already formed fastener slots or outer curved surfaces. Chamfering the fastener slots with cutting tools facilitates assembly guidance, making it easier for the fastener to be inserted or screwed into the slots. Chamfering the outer curved surfaces removes sharp edges, preventing scratches to operators. Furthermore, a fine chamfering process makes the fastener more compatible with the assembly structure, ensuring a snug fit and seal. Therefore, chamfering is an essential step in the fastener production process.

[0004] In the existing technology, fasteners are generally classified into rod-shaped or plate-shaped parts. However, most cutting equipment used for chamfering rod-shaped or plate-shaped fasteners can only process single plate-shaped or rod-shaped fasteners. This is because the structure of the cutting equipment used to clamp and fix the fastener material is difficult to achieve uniform and rapid clamping of continuously moving plate-shaped or rod-shaped fastener materials. Summary of the Invention

[0005] This invention proposes a fastener chamfering device, which solves the problem that existing fastener chamfering devices have difficulty in uniformly and quickly clamping continuously moving sheet-like or rod-shaped fastener materials.

[0006] The technical solution of the present invention is as follows: A fastener chamfering device includes a chamfering device body, a multi-axis drive device on one side of the chamfering device body, a chamfering cutter disposed on the multi-axis drive device, the multi-axis drive device moving laterally on the chamfering device body, and further includes:

[0007] A fixed support cylinder is provided on the other side of the chamfering equipment body. A conveyor frame is provided between the fixed support cylinder and the chamfering cutter. A transmission belt structure is provided inside the conveyor frame.

[0008] Rotary supports are provided on the transmission belt structure along its own transmission path. The transmission belt structure drives the multiple rotating supports to correspond sequentially with the center point of the fixed support cylinder.

[0009] A clamping rotating cylinder is rotatably connected inside each of the rotating supports. A rod-shaped clamping structure is provided on the side of the clamping rotating cylinder near the fixed support for clamping rod-shaped fasteners.

[0010] A sheet-shaped clamping structure, wherein the rod-shaped clamping structure is further provided with a sheet-shaped clamping structure for clamping the sheet-shaped fastener;

[0011] The fixed support cylinder is provided with a drive engagement structure that cooperates with the rod-shaped clamping structure and drives the clamping rotating cylinder to rotate on the rotating support.

[0012] The rotating support includes a rotating ring sleeve, which is mounted on the transmission belt structure via a support plate, and one side of the clamping drum is rotatably mounted inside the rotating ring sleeve.

[0013] Multiple through slots are provided on both sides of the clamping cylinder, and a receiving support cylinder is provided in the through slot, and a spring is provided in the receiving support cylinder.

[0014] The rod-shaped clamping structure includes multiple clamping rods, each corresponding to one of the through slots. A fixing ring is fitted on the outer side of each clamping rod. The fixing ring is slidably disposed inside the receiving support cylinder. The spring is disposed between the fixing ring and the receiving support cylinder. An arc-shaped clamping groove is provided on one side of each clamping rod.

[0015] A damping ring is provided on the side of the clamping support rod away from the clamping cylinder.

[0016] The sheet-shaped clamping structure includes an arc-shaped offset plate and a curved clamping frame. Each of the damping rings is rotatably fitted with the arc-shaped offset plate, and multiple arc-shaped offset plates are arranged in pairs. The curved clamping frame is provided on the arc-shaped offset plate, and the corresponding two curved clamping frames cooperate to clamp the side of the sheet-shaped fastener.

[0017] A compression rod is provided between multiple clamping rods located on the same side, and two of the compression rods are located inside the clamping cylinder to clamp nut-type fasteners.

[0018] The drive engagement structure includes a drive drum, a contact rod, and a rod moving assembly. The drive drum is rotatably connected inside the fixed support cylinder. The fixed support cylinder is equipped with a motor drive device that drives the drive drum to rotate. The drive drum is equipped with two relatively movable contact rods. The contact rods cooperate with multiple clamping rods on the corresponding side. The fixed support cylinder is equipped with the rod moving assembly that drives the two contact rods to move.

[0019] The drive drum has a rectangular sliding groove, and the abutting support rod is slidably connected in the rectangular sliding groove. The abutting support rod has multiple abutting grooves on the side near the clamping support rod.

[0020] The support rod moving assembly includes a double-headed drive cylinder, which is disposed on the outer wall of the fixed support cylinder. Each of the two output ends of the double-headed drive cylinder is provided with an L-shaped push rod, which passes through the fixed support cylinder and is connected to the abutting support rod.

[0021] The working principle and beneficial effects of this invention are as follows:

[0022] When performing chamfering on fasteners, this invention allows for the selection of different clamping methods based on the shape of the fastener. For rod-shaped fasteners, the fastener is inserted into the clamping cylinder. After the cylinder is moved to a position corresponding to the fixed support cylinder, two relatively movable abutment rods drive multiple clamping rods on both sides to clamp and fix the fastener. For sheet-shaped fasteners, they are placed on one side of the clamping cylinder, and the sides are clamped and fixed using arc-shaped offset plates. For nut-type fasteners, they are moved inside the clamping cylinder, and then abutment rods are used... When the clamping support rod moves inward to the inside of the clamping drum, the clamping support rod drives the extrusion support rod to clamp the nut-type fastener. After clamping the rod-shaped fastener, plate-shaped fastener, or nut-type fastener, the clamping drum rotates on the rotating support to adjust the circumferential position of the rod-shaped fastener, plate-shaped fastener, or nut-type fastener. This allows the chamfering tool to perform chamfering processing on different end faces of the rod-shaped fastener, plate-shaped fastener, or nut-type fastener under the drive of the multi-axis drive device. Furthermore, during use, this invention can stably clamp fasteners of various shapes, such as rod-shaped fasteners, plate-shaped fasteners, or nut-type fasteners, improving the ease of use for chamfering processing of various fasteners. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1This is a schematic diagram of the structure of a fastener chamfering device disclosed in this invention;

[0025] Figure 2 For the present invention Figure 1 A schematic diagram of the structure of the conveyor frame, transmission belt, and clamping drum;

[0026] Figure 3 For the present invention Figure 1 A schematic diagram of the structure of the clamping rotary drum, clamping support rod, arc-shaped offset plate and extrusion support rod in combination;

[0027] Figure 4 For the present invention Figure 1 A partial cross-sectional structural diagram showing the fit between the central clamping cylinder, clamping support rod, receiving support cylinder, and fixing ring;

[0028] Figure 5 For the present invention Figure 4 A magnified structural diagram of point A in the middle;

[0029] Figure 6 For the present invention Figure 1 A schematic diagram of the fixed support cylinder and the drive engagement structure;

[0030] Figure 7 For the present invention Figure 6 A partial cross-sectional view of the fixed support cylinder.

[0031] In the diagram: 1. Chamfering equipment body; 2. Multi-axis drive equipment; 3. Chamfering cutter; 4. Fixed support cylinder; 5. Conveyor frame; 6. Transmission belt structure; 7. Clamping drum; 8. Slide ram structure; 9. Cutter drive equipment;

[0032] 101. Rotate the ring sleeve;

[0033] 201. Support cylinder; 202. Spring;

[0034] 301. Clamping rod; 302. Fixing ring; 303. Arc-shaped clamping groove; 304. Damping ring sleeve;

[0035] 401. Arc-shaped offset piece; 402. Curved clamping frame;

[0036] 501. Extrusion strut;

[0037] 601. Drive drum; 602. Motor drive device; 603. Abutment support rod; 611. Rectangular slide groove; 612. Abutment groove; 621. Double-headed drive cylinder; 622. L-shaped push rod. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] This embodiment proposes a fastener chamfering device, including a chamfering device body 1. Please refer to [link / reference]. Figure 1 The chamfering equipment body 1 has a multi-axis drive device 2 on one side, and a chamfering cutter 3 is provided on the multi-axis drive device 2. The multi-axis drive device 2 moves laterally on the chamfering equipment body 1. The multi-axis drive device 2 is a ram structure 8 with multiple processing drive axes in the prior art. A cutter drive device 9 is slidably arranged on the ram structure 8. The chamfering cutter 3 is arranged on the cutter drive device 9. The cutter drive device 9 drives the chamfering cutter 3 to rotate and move along the chamfering area of ​​the fastener to complete the chamfering cutting process on the surface of the fastener. The cutter drive device 9 can move along the sliding path on the ram structure 8, and the ram structure 8 is offset under the drive of the multiple processing drive axes of the multi-axis drive device 2 to realize the multi-directional movement of the chamfering cutter 3, so that the chamfering cutter 3 can perform chamfering processes on fasteners of various shapes.

[0040] It also includes fixed support cylinder 4, please refer to Figure 1 , Figure 6 and Figure 7 The fixed support cylinder 4 is located on the other side of the chamfering equipment body 1. The fixed support cylinder 4 is used to fix and install the drive engagement structure that cooperates with the clamping rotating cylinder 7. A conveyor frame 5 is provided between the fixed support cylinder 4 and the chamfering cutter 3. Please refer to [link / reference]. Figure 1 and Figure 2 The conveyor frame 5 is equipped with a transmission belt structure 6. The transmission belt structure 6 drives multiple rotating supports and multiple clamping drums 7 to move cyclically along its own transmission path. This enables the unprocessed fasteners to be loaded, chamfered, and unloaded sequentially. After the fastener is placed in the clamping drum 7, the transmission belt structure 6 moves the corresponding clamping drum 7 and the fastener to a position corresponding to the center point of the fixed support 4. Then, the drive engagement structure engages with the corresponding clamping drum 7, causing the clamping drum 7 and the fastener to rotate and flip, adjusting the chamfer position of the fastener. After the fastener is chamfered, the transmission belt structure 6 continues to move the clamping drum 7 and the fastener to the unloading area, where the operator removes the chamfered fastener.

[0041] The transmission belt structure 6 has multiple rotating supports along its own transmission path. Please refer to [link / reference]. Figure 2The transmission belt structure 6 drives multiple rotating supports to correspond sequentially with the center point of the fixed support cylinder 4. The rotating support includes a rotating ring 101, which is mounted on the transmission belt structure 6 via a support plate. One side of the clamping cylinder 7 is rotatably mounted inside the rotating ring 101. The transmission belt structure 6 drives multiple support plates and multiple rotating rings 101 to circulate, so that multiple clamping cylinders 7 and the fasteners placed thereon also circulate along the transmission belt structure 6. The clamping cylinders 7 can rotate within the rotating ring 101, thereby adjusting the processing position of the fasteners.

[0042] Each rotating support is rotatably connected to a clamping cylinder 7. Please refer to [link / reference]. Figures 3 to 5 The clamping cylinder 7 has a rod-shaped clamping structure on the side near the fixed support cylinder 4 for clamping rod-shaped fasteners. Multiple through slots are provided on both sides of the clamping cylinder 7, and a receiving support cylinder 201 is provided in the through slot. A spring 202 is provided in the receiving support cylinder 201. After the rod-shaped fastener is inserted into the clamping cylinder 7, the rod-shaped fastener moves with the clamping cylinder 7. After the clamping cylinder 7 moves to the position corresponding to the fixed support cylinder 4, it drives the clamping support rod 301 to move towards the rod-shaped fastener. At this time, the spring 202 is driven to contract in the receiving support cylinder 201, providing elastic force for the clamping support rod 301 to reset.

[0043] The rod-shaped clamping structure includes a clamping support rod 301. Please refer to [link / reference]. Figure 4 The number of clamping rods 301 is set to multiple and corresponds one-to-one with the through slots. Each clamping rod 301 is fitted with a fixing ring 302 on its outer side. The fixing ring 302 is slidably set inside the receiving support cylinder 201. The spring 202 is set between the fixing ring 302 and the receiving support cylinder 201. An arc-shaped clamping groove 303 is opened on one side of the clamping rod 301. When the clamping rod 301 is driven to move inward to the clamping rotating cylinder 7, the multiple arc-shaped clamping grooves 303 on the upper and lower sides clamp the two sides of the rod-shaped fastener, thereby clamping the rod-shaped fastener.

[0044] A damping ring 304 is provided on the side of the clamping support rod 301 away from the clamping rotating cylinder 7. Please refer to [link / reference]. Figure 5 When clamping the plate-shaped fastener, after the arc-shaped offset plate 401 is moved to the designated position, it is necessary to prevent the arc-shaped offset plate 401 from moving and resetting. The damping ring sleeve 304 used in this invention generates a large friction force between the arc-shaped offset plate 401 and the damping ring sleeve 304 when adjusting the movement of the arc-shaped offset plate 401, which effectively prevents the arc-shaped offset plate 401 from flipping and resetting during the movement of the clamping rotating cylinder 7.

[0045] The rod-shaped clamping structure is also equipped with a plate-shaped clamping structure for clamping plate-shaped fasteners. Please refer to [link / reference]. Figure 3The sheet-shaped clamping structure includes an arc-shaped offset plate 401 and a curved clamping frame 402. An arc-shaped offset plate 401 is rotatably fitted onto each damping ring sleeve 304, and multiple arc-shaped offset plates 401 are arranged in pairs. A curved clamping frame 402 is provided on the arc-shaped offset plate 401, and two corresponding curved clamping frames 402 cooperate to clamp the side of the sheet-shaped fastener. When it is necessary to fix and clamp the sheet-shaped fastener, the present invention first moves the sheet-shaped fastener to the side of the clamping drum 7 near the chamfering tool 3. Then, the arc-shaped offset pieces 401 on both sides move towards the upper and lower sides of the sheet fastener, causing the curved clamping frame 402 to deform and clamp the upper and lower sides of the sheet fastener. When the clamping rotating cylinder 7 that clamps the sheet fastener is moved to the side of the fixed support cylinder 4, the multiple clamping support rods 301 on both sides are driven to descend, causing the arc-shaped offset pieces 401 and the curved clamping frame 402 to be further squeezed towards the sheet fastener, causing the curved clamping frame 402 to deform and clamp and fix the sheet fastener.

[0046] A compression support rod 501 is provided between multiple clamping support rods 301 located on the same side. Please refer to [link / reference]. Figure 3 Both extrusion rods 501 are located inside the clamping cylinder 7 to clamp nut-type fasteners. When chamfering is required on the nut-type fasteners, the side of the nut to be chamfered is moved into the clamping cylinder 7. Then, multiple clamping rods 301 located on both sides move inward into the clamping cylinder 7, so that the two extrusion rods 501 clamp both sides of the nut-type fasteners. Tension grooves are opened at the adjacent ends of the two extrusion rods 501, so that the extrusion rods 501 can be slightly deformed to adapt to nut-type fasteners of different sizes.

[0047] The fixed support cylinder 4 is equipped with a rod-shaped clamping structure; please refer to [link / reference]. Figures 6 to 7 The drive engagement structure, which drives the clamping rotating cylinder 7 to rotate on the rotating support, includes a drive rotating cylinder 601, an abutting support rod 603, and a support rod moving assembly. The drive rotating cylinder 601 is rotatably connected inside the fixed support cylinder 4. The fixed support cylinder 4 is provided with a motor drive device 602 that drives the drive rotating cylinder 601 to rotate. After the drive rotating cylinder 601 is engaged with one of the clamping rotating cylinders 7, the motor drive device 602 drives the drive rotating cylinder 601 to rotate, so that the clamping rotating cylinder 7 rotates together with the drive rotating cylinder 601, thereby adjusting the position of the chamfered end face of the clamped fastener, so that the chamfered end face of the fastener corresponds to the position of the chamfering tool 3. The motor drive device 602 used in this invention includes a drive motor and a gearbox. The drive motor is set on the fixed support cylinder 4, and the gearbox is installed between the output end of the drive motor and the drive rotating cylinder 601. When the drive motor is started, the drive rotating cylinder 601 is driven to rotate through the gearbox.

[0048] The drive drum 601 is provided with two relatively movable abutment rods 603. The abutment rods 603 cooperate with multiple clamping rods 301 on the corresponding side. The drive drum 601 is provided with a rectangular slide groove 611. The abutment rods 603 are slidably connected in the rectangular slide groove 611. Multiple abutment grooves 612 are provided on the side of the abutment rods 603 near the clamping rods 301. When it is necessary to drive the clamping rods 301 to move inward to the clamping drum 7 and to keep the drive drum 601 and the clamping drum 7 engaged, the two abutment rods 603 are driven to move inward to the clamping drum 7 in the rectangular slide groove 611, so that the abutment grooves 612 on the abutment rods 603 abut against the side of the corresponding clamping rods 301. Then, the clamping rods 301 are driven to move inward to the clamping drum 7 to fix the fastener.

[0049] The fixed support cylinder 4 is equipped with a support rod moving assembly that drives two abutment support rods 603 to move. The support rod moving assembly includes a double-headed drive cylinder 621, which is located on the outer wall of the fixed support cylinder 4. Each of the two output ends of the double-headed drive cylinder 621 is equipped with an L-shaped push rod 622. The L-shaped push rod 622 passes through the fixed support cylinder 4 and is connected to the abutment support rods 603. When it is necessary to drive the two abutment support rods 603 to move relative to each other, the double-headed electric cylinder is activated to drive the two L-shaped push rods 622 to move in opposite directions, thereby moving the position of the abutment support rods 603.

[0050] When the fastener chamfering device needs to clamp fasteners of different shapes to facilitate subsequent chamfering processing, when clamping rod-shaped fasteners, the rod-shaped fastener is inserted into the clamping cylinder 7, and the rod-shaped fastener is temporarily restricted by the clamping support rods 301 on both sides. After the clamping cylinder 7 is moved to the position corresponding to the fixed support cylinder 4, two relatively movable abutment support rods 603 are used to drive the multiple clamping support rods 301 on both sides to clamp and fix the rod-shaped fastener.

[0051] When it is necessary to clamp the sheet fastener, the sheet fastener is placed on one side of the clamping cylinder 7, and the sides of the sheet fastener are clamped and fixed using the arc-shaped offset pieces 401 on both sides. Then, the clamping cylinder is moved to the position corresponding to the fixed support cylinder 4, and the multiple clamping support rods 301 on both sides are driven to descend, so that the arc-shaped offset pieces 401 and the curved clamping frame 402 are further squeezed towards the sheet fastener, causing the curved clamping frame 402 to deform and clamp and fix the sheet fastener.

[0052] When clamping and fixing fasteners such as nuts, the fasteners are moved to the inside of the clamping cylinder 7, and then the clamping support rod 301 is moved to the inside of the clamping cylinder 7 by the abutment support rod 603. The clamping support rod 301 drives the extrusion support rod 501 to clamp the fasteners.

[0053] After clamping the rod-shaped fastener, plate-shaped fastener, or nut-type fastener, the drive drum 601 and the clamping drum 7 are kept engaged. By driving the drive drum 601 to rotate, the clamping drum 7 is driven to rotate on the rotating support, adjusting the circumferential position of the rod-shaped fastener, plate-shaped fastener, or nut-type fastener. This allows the chamfering tool 3 to perform chamfering on different end faces of the rod-shaped fastener, plate-shaped fastener, or nut-type fastener under the drive of the multi-axis drive device 2.

[0054] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fastener chamfering device, comprising a chamfering device body (1), wherein a multi-axis drive device (2) is provided on one side of the chamfering device body (1), and a chamfering cutter (3) is provided on the multi-axis drive device (2), wherein the multi-axis drive device (2) moves laterally on the chamfering device body (1), characterized in that, Also includes: A fixed support cylinder (4) is provided on the other side of the chamfering equipment body (1). A conveyor frame (5) is provided between the fixed support cylinder (4) and the chamfering cutter (3). A transmission belt structure (6) is provided inside the conveyor frame (5). Rotating supports, the transmission belt structure (6) is provided with multiple rotating supports along its own transmission path, the transmission belt structure (6) drives multiple rotating supports to correspond to the center point of the fixed support cylinder (4) in sequence; The clamping rotating cylinder (7) is rotatably connected in each of the rotating supports. The clamping rotating cylinder (7) is provided with a rod-shaped clamping structure on the side near the fixed support cylinder (4) for clamping rod-shaped fasteners. A sheet-shaped clamping structure, wherein the rod-shaped clamping structure is further provided with a sheet-shaped clamping structure for clamping the sheet-shaped fastener; The fixed support cylinder (4) is provided with a drive engagement structure that cooperates with the rod-shaped clamping structure and drives the clamping rotating cylinder (7) to rotate on the rotating support.

2. The fastener chamfering device according to claim 1, characterized in that, The rotating support includes: A rotating ring sleeve (101) is mounted on the transmission belt structure (6) via a support plate, and one side of the clamping drum (7) is rotatably mounted inside the rotating ring sleeve (101).

3. The fastener chamfering device according to claim 2, characterized in that, Multiple through slots are provided on both sides of the clamping rotating cylinder (7), and a receiving support cylinder (201) is provided in the through slot, and a spring (202) is provided in the receiving support cylinder (201).

4. A fastener chamfering device according to claim 3, characterized in that, The rod-shaped clamping structure includes: The clamping support rods (301) are multiple and correspond one-to-one with the through grooves. Each clamping support rod (301) is fitted with a fixing ring (302) on its outer side. The fixing ring (302) is slidably disposed in the receiving support cylinder (201). The spring (202) is disposed between the fixing ring (302) and the receiving support cylinder (201). An arc-shaped clamping groove (303) is opened on one side of the clamping support rod (301).

5. A fastener chamfering device according to claim 4, characterized in that, A damping ring (304) is provided on the side of the clamping support rod (301) away from the clamping rotary cylinder (7).

6. A fastener chamfering device according to claim 5, characterized in that, The sheet-shaped clamping structure includes: Arc-shaped offset plate (401), each of the damping ring sleeves (304) is rotatably fitted with the arc-shaped offset plate (401), and multiple arc-shaped offset plates (401) are grouped in pairs; A curved clamping frame (402) is provided on the arc-shaped offset piece (401), and two corresponding curved clamping frames (402) cooperate to clamp the side of the piece fastener.

7. A fastener chamfering device according to claim 5, characterized in that, A compression rod (501) is provided between multiple clamping rods (301) located on the same side. Both compression rods (501) are located inside the clamping cylinder (7) to clamp nut-type fasteners.

8. A fastener chamfering device according to claim 7, characterized in that, The driving engagement structure includes: A drive drum (601) is rotatably connected inside the fixed support cylinder (4), and a motor drive device (602) is provided on the fixed support cylinder (4) to drive the drive drum (601) to rotate. Abutting support rod (603) is provided on the drive drum (601) with two relatively movable abutting support rods (603), and the abutting support rod (603) cooperates with a plurality of clamping support rods (301) on the corresponding side; The support rod moving assembly is provided on the fixed support cylinder (4) to drive the two abutting support rods (603) to move.

9. A fastener chamfering device according to claim 8, characterized in that, The drive drum (601) is provided with a rectangular slide groove (611), and the abutting support rod (603) is slidably connected in the rectangular slide groove (611). The abutting support rod (603) is provided with a plurality of abutting grooves (612) on the side near the clamping support rod (301).

10. A fastener chamfering device according to claim 9, characterized in that, The support rod moving assembly includes: A double-headed drive cylinder (621) is provided on the outer wall of the fixed support cylinder (4). Both output ends of the double-headed drive cylinder (621) are provided with L-shaped push rods (622). The L-shaped push rods (622) pass through the fixed support cylinder (4) and are connected to the abutting support rod (603).

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