A chamfering device for bolt production

Abstract

This invention relates to the field of bolt processing technology, specifically disclosing a chamfering device for bolt production. The device includes a feeding conveyor mechanism, a chamfering mechanism, and a discharging conveyor mechanism. The chamfering mechanism includes a tool assembly, a tool mounting base, a rotary drive, and a mounting frame. The tool assembly includes a tool holder, a shank chamfering cutter, a head chamfering cutter, and a tool changing drive. The shank chamfering cutter has a first chamfering position and a first idle position, while the head chamfering cutter has a second chamfering position and a second idle position. The tool changing drive can switch the shank chamfering cutter between the first chamfering position and the first idle position. When the shank chamfering cutter is in the first chamfering position, its rotation can chamfer the shank. When the head chamfering cutter is in the second chamfering position, its rotation can chamfer the head. In use, after chamfering the shank of the bolt, there is no need to remove the bolt for reloading; the chamfering mechanism can chamfer the head of the bolt, thereby improving the chamfering efficiency.

Description

Technical Field

[0001] This invention relates to the field of bolt processing technology, and specifically to a chamfering device for bolt production. Background Technology

[0002] A bolt is a common type of fastener, consisting of a head and a shank. Bolts are typically used in conjunction with nuts to fasten two parts with through holes.

[0003] Bolts require chamfering at both ends during production. Chinese patent application CN118544133A discloses a device for chamfering and punching bolt bars, including a feeding mechanism and a processing mechanism. The feeding mechanism can quickly and easily clamp and fix the bolt bars, and can automatically perform the feeding operation. The processing mechanism can quickly and easily adjust the position of the drill rod and the chamfering disc, thereby enabling rapid and convenient chamfering and punching of the bolt bars. The feeding mechanism includes a carrying box, an electric telescopic rod, a connecting plate, a fixing plate, and a buffer box. The inner wall of the carrying box is connected to the outer wall of the electric telescopic rod. The bottom of the electric telescopic rod is connected to the top of the connecting plate. One end of the connecting plate is connected to one side of the fixing plate. The inner wall of the fixing plate is connected to the outer wall of the buffer box. The inner wall of the buffer box is slidably connected to both ends of the buffer plate. The bottom of the buffer plate is connected to the top of the connecting rod. A clamping plate is installed at the bottom of the connecting rod. A piston rod is installed at the bottom of the connecting plate. A piston plate is installed at the bottom of the piston rod. A piston box is slidably connected to both ends of the piston plate. An air guide pipe is connected to one side of the piston box. A telescopic airbag is connected to one end of the air guide pipe. A moving plate is installed at one end of the telescopic airbag. A fixing box is slidably connected to the outer wall of the moving plate. A connecting rod is installed at the top of the moving plate. A pop-out plate is installed at the top of the connecting rod. Placement plates are installed at both ends of the pop-out plate. A support rod is installed at the bottom of the placement plate. A fixing rod is installed on one side of the bottom plate. A feeding plate is installed at one end of the fixing rod. A limit plate is slidably connected to the inner wall of the feeding plate. When it is necessary to chamfer and punch the bar stock, the operator places the bar stock on the loading plate and uses the loading mechanism to load and clamp the bar stock. After it is clamped and fixed, the processing mechanism is activated to perform the chamfering and punching operation on the bar stock.

[0004] The problem with the aforementioned bolt bar chamfering and punching device is that when chamfering both ends of the bar, the operator needs to first place the bar on the loading plate, then the loading mechanism loads and clamps the bar, and the processing mechanism chamfers one end of the bar; then the operator needs to remove the bar, turn it 180 degrees, and place it back on the loading plate, the loading mechanism loads and clamps the bar again, and the processing mechanism chamfers the other end of the bar. This device requires two loading processes to chamfer both ends of the bar, resulting in low chamfering efficiency. Summary of the Invention

[0005] This invention provides a chamfering device for bolt production, aiming to solve the problem of low chamfering efficiency of bolt bar chamfering and punching devices in the prior art.

[0006] The chamfering device for bolt production of the present invention includes a feeding conveying mechanism for conveying bolts into a chamfering mechanism, a chamfering mechanism, and a discharging conveying mechanism for conveying chamfered bolts out. The chamfering mechanism includes a tool assembly, a tool mounting base, a rotary drive, and a mounting frame. The tool mounting base is rotatably mounted on the mounting frame. The rotary drive is driven by the tool mounting base to drive the tool mounting base to rotate. The tool assembly includes a tool holder, a shank chamfering cutter, a head chamfering cutter, and a tool changing drive. The tool holder and the tool changing drive are mounted on the tool mounting base. The shank chamfering cutter and the head chamfering cutter are mounted on the tool holder. When the tool mounting base rotates, it can synchronously rotate the shank chamfering cutter and the head chamfering cutter. The shank chamfering cutter has a first chamfering position and... The first idle position and the head chamfering cutter have a second chamfering position and a second idle position. When the shank chamfering cutter is in the first chamfering position, the head chamfering cutter is in the second idle position. When the shank chamfering cutter is in the first idle position, the head chamfering cutter is in the second chamfering position. When the shank chamfering cutter is between the first chamfering position and the first idle position, the head chamfering cutter is between the second chamfering position and the second idle position. The tool changing drive can drive the shank chamfering cutter to switch between the first chamfering position and the first idle position. When the shank chamfering cutter is in the first chamfering position, the rotation of the shank chamfering cutter can chamfer the shank of the bolt it contacts. When the head chamfering cutter is in the second chamfering position, the rotation of the head chamfering cutter can chamfer the head of the bolt it contacts.

[0007] The beneficial effects are as follows: When using the chamfering device for bolt production of the present invention, the chamfering blade on the shank is first positioned in the first chamfering position. Then, the feeding conveyor transports the bolt to be chamfered into the chamfering mechanism. When the end face of the shank of the bolt contacts the chamfering blade, the rotating chamfering blade chamfers the shank. After the shank is chamfered, the chamfering blade is driven to the first idle position by the blade changing drive. At this time, the head chamfering blade is in the second chamfering position and contacts the end face of the bolt head away from the shank. The rotating head chamfering blade chamfers the head. After the head is chamfered, the unloading conveyor transports the bolt out of the chamfering mechanism. When using the chamfering device for bolt production of the present invention, after the bolt shank is chamfered, there is no need to remove the bolt and re-feed it; the chamfering mechanism can chamfer the bolt head, thereby improving the chamfering efficiency of the bolt.

[0008] Preferably, the tool mounting base is a cylindrical structure, with its axis of rotation collinear with the axis of rotation. A mounting groove is formed on the inner wall of the tool mounting base, and the tool changer is located within this groove. The tool holder is rotatably mounted within the mounting groove, with its axis of rotation perpendicular to the radial direction of the tool mounting base. A shank chamfering cutter and a head chamfering cutter are fixed at both ends of the tool holder, both located on the side of the tool holder closest to the axis of the tool mounting base. Bolts can be conveyed axially along the tool mounting base and pass through it. In the direction of bolt conveying, the shank chamfering cutter is located in front of the head chamfering cutter. When the shank chamfering cutter is in the first chamfering position, it extends beyond the mounting groove, and the distance from the shank chamfering cutter to the axis of the tool mounting base is less than the distance from the head chamfering cutter to the axis of the tool mounting base. When the head chamfering cutter is in the second chamfering position, it extends beyond the mounting groove, and the distance from the head chamfering cutter to the axis of the tool mounting base is less than the distance from the shank chamfering cutter to the axis of the tool mounting base.

[0009] Preferably, a sliding seat is slidably provided in the mounting groove along the axis of the tool mounting seat. The sliding seat is fixed to the groove wall of the mounting groove through a sliding elastic element, and the sliding seat is provided with a shaft hole. The tool holder is fixedly provided with a rotating connecting part, which is rotatably provided in the mounting groove through a rotating shaft. A limiting block is fixedly provided in the mounting groove. The limiting block has a stop surface and a limiting pressing surface. A telescopic insertion hole is provided on the rotating connecting part. A stop and a telescopic elastic element are provided in the telescopic insertion hole. The stop is connected in the telescopic insertion hole through the telescopic elastic element. One end of the stop extends out of the telescopic insertion hole to form an extended end. When the chamfering tool of the rod is in the first chamfer position, the stop surface abuts against the extended end to restrict the extended end from rotating backward. The tool holder is also provided with a pushing surface. After the rod is chamfered, the end face of the rod can push the pushing surface to drive the sliding seat away from the stop surface, so that the extended end can pass the limiting block and rotate backward. The limiting pressing surface is an arc-shaped surface. When the extended end rotates forward, the limiting pressing surface can press the extended end back into the telescopic insertion hole.

[0010] Preferably, the tool changing drive includes an axial rack, a sliding rod, a pressing block, a pressing elastic element, a pin, a plugging elastic element, and a connecting frame. The connecting frame is fixed to the wall of the mounting groove. The sliding rod is axially slidably mounted on the connecting frame. The axial rack is fixed to the sliding rod. One end of the rotating shaft is fixed with a gear that meshes with the axial rack. A return torsion spring is also provided on the rotating shaft. A radial groove is formed on the sliding rod. The pressing block is slidably mounted in the radial groove. The pressing elastic element connects the pressing block and the wall of the radial groove. The pressing block extends out of the radial groove to form an overhang. The overhang has a pressing inclined surface. An axially extending slot is formed on the sliding rod. The slot communicates with the radial groove. The pin is slidably mounted in the slot. The pin is connected to the sliding rod through the plugging elastic element. An ejector block is also fixed on the connecting frame. The axial rack moves toward the ejector block. The ejector block can eject the pin from the slot. At this time, the head chamfering tool is in the second chamfer position. The bolt continues to be fed. The bolt head can squeeze the overhang back into the radial groove.

[0011] The beneficial effect is that it can convert the power of the bolt conveyor forward into the power to drive the tool holder to rotate, and can drive the chamfering tool to switch between the chamfering position and the idle position without setting up an additional power source, thus reducing equipment costs.

[0012] Preferably, a roller is rotatably provided at the end of the tool holder away from the head chamfering tool, and the rotation axis of the roller is parallel to the rotation axis of the tool holder.

[0013] The beneficial effect is that the rollers can reduce the friction when the tool holder moves axially on the outer circumferential surface of the shank.

[0014] Preferably, the extended end is provided with a top pressing slope. When the extended end rotates forward, the top pressing slope can press against the limiting pressing surface, pressing the extended end back into the telescopic insertion hole.

[0015] The beneficial effect is that the setting of the top pressure slope makes it easier for the limiting extrusion surface to squeeze the protruding end back into the telescopic insertion hole.

[0016] Preferably, the unloading conveying mechanism is located on the side of the chamfering mechanism away from the loading conveying mechanism. The unloading conveying mechanism includes a gripper cylinder and an electric push rod. The gripper cylinder's gripper can hold the shank of the bolt. The electric push rod is fixed on the mounting frame, and the gripper cylinder is fixed on the telescopic rod of the electric push rod. The electric push rod can drive the gripper cylinder to move along the axis of the tool mounting seat while holding the bolt.

[0017] Preferably, the feeding and conveying mechanism includes a belt conveyor, a bearing assembly, and a limiting assembly. The bearing assembly includes a head bearing seat and a rod bearing seat, which are fixedly spaced on the conveyor belt. In the bolt conveying direction, the rod bearing seat is located in front of the head bearing seat. The head bearing seat includes a base and a side baffle. The side baffle can abut against the end face of the bolt head away from the rod. A head bearing groove adapted to the lower half of the bolt head is formed on the base, and a rod bearing groove adapted to the lower half of the bolt rod is formed on the rod bearing seat. The limiting assembly includes a fixing frame and a limiting cover. The fixing frame is fixed on the mounting frame, and the limiting cover is fixed on the fixing frame. The limiting cover is located above the conveying end of the conveyor belt. A head limiting groove adapted to the upper half of the bolt head is opened on the limiting cover. The head bearing groove and the head limiting groove cooperate to prevent the bolt head from rotating. When the bolt head is disengaged from the head limiting groove, the gripper of the gripper cylinder clamps the rod of the bolt.

[0018] Preferably, multiple load-bearing components are spaced apart along the length of the conveyor belt.

[0019] Preferably, the mounting frame is also fixed with a material collection box, which is located below the movement path of the bolt. The upper end of the material collection box is provided with an opening for the bolt to fall. The gripper cylinder can hold the bolt, move it above the opening, and release the bolt.

[0020] The beneficial effect is that it makes it easier to collect the bolts after the chamfering is completed.

[0021] The beneficial effects of this invention are as follows: When using the chamfering device for bolt production, the chamfering blade on the shank is first positioned in the first chamfering position. Then, the feeding conveyor transports the bolt to be chamfered into the chamfering mechanism. When the end face of the shank of the bolt contacts the chamfering blade, the rotating chamfering blade chamfers the shank. After the shank is chamfered, the chamfering blade is moved to the first idle position by the blade changing drive. At this time, the head chamfering blade is in the second chamfering position and contacts the end face of the bolt head away from the shank. The rotating head chamfering blade chamfers the head. After the head is chamfered, the unloading conveyor transports the bolt out of the chamfering mechanism. In use, after the bolt shank is chamfered, there is no need to remove the bolt and re-feed it; the chamfering mechanism can chamfer the bolt head, thereby improving the chamfering efficiency. Furthermore, the power generated by the bolt feed can be converted into the power to drive the tool holder to rotate, eliminating the need for an additional power source to switch the chamfering tool between the chamfering and idle positions, thus reducing equipment costs. Moreover, the rollers reduce friction when the tool holder moves axially on the outer circumference of the shank. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the chamfering device for bolt production according to the present invention.

[0023] Figure 2 This is a three-dimensional structural diagram of the chamfering mechanism of the chamfering device for bolt production of the present invention, which is just fed into the bolt.

[0024] Figure 3 yes Figure 2 The front view of the structure.

[0025] Figure 4 This is a partial structural cross-sectional view of the chamfering device for bolt production according to the present invention.

[0026] Figure 5 This is a three-dimensional structural diagram of the tool assembly and rotary drive component of the chamfering device for bolt production of the present invention.

[0027] Figure 6 This is a schematic diagram of the rotating drive component of the chamfering device for bolt production according to the present invention.

[0028] Figure 7This is a cross-sectional view of the chamfering mechanism of the chamfering device for bolt production of the present invention.

[0029] Figure 8 This is a schematic diagram showing the state where the bolt shank is just in contact with the chamfering tool on the shank at the first chamfer position.

[0030] Figure 9 yes Figure 8 Enlarged view of the structure at point A in the middle.

[0031] Figure 10 This is a structural diagram showing the state after the chamfering of the rod is completed.

[0032] Figure 11 yes Figure 10 Enlarged view of the structure at point B.

[0033] Figure 12 This is a structural diagram showing the contact state between the bolt head and the head chamfering tool in the second chamfer position.

[0034] Figure 13 yes Figure 12 Enlarged view of the structure at point C.

[0035] Figure 14 This is a structural diagram showing the bolt emerging from the chamfering device.

[0036] Figure 15 yes Figure 14 Enlarged view of the structure at point D.

[0037] Figure 16 This is a schematic cross-sectional view of the axial rack and sliding rod of the chamfering device for bolt production of the present invention.

[0038] Figure 17 This is an exploded view of the mounting box and pin of the chamfering device for bolt production of the present invention.

[0039] Figure 18 This is a schematic diagram of the structure of the chamfering device for bolt production of the present invention when the head support seat moves to below the limiting cover.

[0040] Figure label:

[0041] 11. Tool holder; 111. Rotating connection; 112. Rotating shaft; 113. Pushing surface; 114. Gear; 12. Chamfering cutter on the rod; 13. Chamfering cutter on the head; 14. Roller; 15. Sliding seat; 151. T-slider; 152. Connecting plate; 16. Sliding elastic element; 21. Tool mounting seat; 211. Mounting groove; 22. Rotary drive element; 23. Mounting bracket; 24. Material collection box; 31. Axial rack; 32. Sliding rod; 321. Radial groove; 322. Slot; 33. Extrusion block; 331. Overhanging end; 3311. Extrusion slope; 34. Extrusion elastic element; 35. Pin; 36. Insertion elastic element; 37. Connecting bracket 371. Radial support; 372. Axial support; 373. Ejector block; 38. Mounting box; 381. Mounting hole; 4. Limiting block; 41. Stopping surface; 42. Limiting extrusion surface; 5. Telescopic stop assembly; 51. Stopping component; 511. Outward extension end; 5111. Top pressure inclined surface; 52. Telescopic elastic component; 6. Grip cylinder; 61. Grip; 7. Conveyor belt; 81. Head bearing seat; 811. Base; 812. Side baffle; 813. Head bearing groove; 82. Rod bearing seat; 821. Rod bearing groove; 91. Fixing frame; 92. Limiting cover; 921. Head limiting groove; 10. Bolt; 101. Head; 102. Rod. Detailed Implementation

[0042] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0043] like Figures 1 to 18 As shown, the chamfering device for bolt production of the present invention includes a feeding conveying mechanism for conveying bolts 10 into a chamfering mechanism, a chamfering mechanism, and a discharging conveying mechanism for conveying the chamfered bolts 10 out. The chamfering mechanism can chamfer the shank 102 and the head 101 of the bolt 10 respectively. In this embodiment, the bolt 10 is a hexagonal bolt.

[0044] like Figures 1 to 3 As shown, the chamfering mechanism includes a tool assembly, a tool mounting base 21, a rotary drive component 22, and a mounting frame 23. The tool mounting base 21 is rotatably mounted on the mounting frame 23. The tool mounting base 21 is a cylindrical structure with an axial through hole, and its axis of rotation is collinear with its axis of rotation. The rotary drive component 22 is connected to the tool mounting base 21 to drive the tool mounting base 21 to rotate. The rotary drive component 22 is fixedly mounted on the mounting frame 23 and is a motor.

[0045] like Figures 2 to 5As shown, the tool assembly includes a tool holder 11, a shank chamfering cutter 12, a head chamfering cutter 13, and a tool changer drive. The tool holder 11 and the tool changer drive are mounted on a tool mounting base 21. Specifically, a mounting groove 211 is formed on the inner wall of the tool mounting base 21. The tool changer drive is located in the mounting groove 211, and the tool holder 11 is rotatably mounted in the mounting groove 211. The rotation axis of the tool holder 11 is perpendicular to the radial direction of the tool mounting base 21. The shank chamfering cutter 12 and the head chamfering cutter 13 are respectively fixed at both ends of the tool holder 11, and both the shank chamfering cutter 12 and the head chamfering cutter 13 are located on the side of the tool holder 11 closest to the axis of the tool mounting base 21. A roller 14 is also rotatably mounted at the end of the tool holder 11 away from the head chamfering cutter 13. The rotation axis of the roller 14 is parallel to the rotation axis of the tool holder 11. A sliding seat 15 is slidably disposed within the mounting groove 211 along the axis of the tool mounting base 21. The sliding seat 15 is connected to the groove wall of the mounting groove 211 via a sliding elastic element 16. Specifically, a T-shaped slider 151 is fixedly disposed on the sliding seat 15, and a T-shaped groove is formed on the groove wall of the mounting groove 211 to slide in cooperation with the T-shaped slider 151. The T-shaped groove extends axially along the tool mounting base 21. A connecting plate 152 is fixedly disposed on the sliding seat 15. The sliding elastic element 16 is a spring, with one end fixed to the connecting plate 152 and the other end fixed to the groove wall of the mounting groove 211. The sliding seat 15 has a shaft hole, and a rotating connecting part 111 is fixedly disposed on the side of the tool holder 11 away from the head chamfering tool 13. A rotating shaft 112 for rotatably inserting into the shaft hole is fixedly disposed on the rotating connecting part 111, and the rotating connecting part 111 is rotatably disposed within the mounting groove 211 via the rotating shaft 112.

[0046] like Figures 6 to 14As shown, when the bolt 10 is fed into the chamfering mechanism, the axis of the bolt 10 is collinear with the rotation axis of the tool mounting base 21, and the bolt 10 can be fed along the axial direction of the tool mounting base 21 and pass through the through hole. In the feeding direction of the bolt 10, the shank chamfering cutter 12 is located in front of the head chamfering cutter 13. The shank chamfering cutter 12 has a first chamfering position and a first idle position, and the head chamfering cutter 13 has a second chamfering position and a second idle position. When the shank chamfering cutter 12 is in the first chamfering position, the shank chamfering cutter 12 can rotate to chamfer the shank 102 of the bolt 10 it contacts. When the shank chamfering cutter 12 leaves the first chamfering position, the shank chamfering cutter 12 no longer contacts the shank 102 of the bolt 10 and cannot chamfer the shank 102. When the head chamfering cutter 13 is in the second chamfering position, the head chamfering cutter 13 can rotate to chamfer the head 101 of the bolt 10 it contacts. When the head chamfering cutter 13 leaves the second chamfering position, it no longer contacts the head 101 of the bolt 10 and cannot chamfer the head 101. When the shank chamfering cutter 12 is in the first chamfering position, the head chamfering cutter 13 is in the second free-spinning position; when the head chamfering cutter 13 is in the second chamfering position, the shank chamfering cutter 12 is in the free-spinning position. When the shank chamfering cutter 12 is between the first chamfering position and the first free-spinning position, the head chamfering cutter 13 is between the second chamfering position and the second free-spinning position. Specifically, when the chamfering cutter 12 is in the first chamfering position, the chamfering cutter 12 extends out of the mounting groove 211, and the distance from the chamfering cutter 12 to the axis of the tool mounting seat 21 is less than the distance from the head chamfering cutter 13 to the axis of the tool mounting seat 21; when the head chamfering cutter 13 is in the second chamfering position, the head chamfering cutter 13 extends out of the mounting groove 211, and the distance from the head chamfering cutter 13 to the axis of the tool mounting seat 21 is less than the distance from the chamfering cutter 12 to the axis of the tool mounting seat 21.

[0047] like Figures 6 to 14As shown, a limiting block 4 is fixedly installed in the mounting groove 211. The limiting block 4 has a stop surface 41 and a limiting pressing surface 42, and the limiting pressing surface 42 is an arc-shaped surface. A telescopic insertion hole is provided on the rotating connection part 111, and a telescopic stop assembly 5 is provided in the telescopic insertion hole. The telescopic stop assembly 5 includes a stop member 51 and a telescopic elastic member 52. Specifically, the telescopic elastic member 52 is a spring, one end of the telescopic elastic member 52 is fixedly connected to the stop member 51, and the other end is fixedly connected to the bottom wall of the telescopic insertion hole. When the telescopic elastic member 52 is in its natural state, one end of the stop member 51 extends out of the telescopic insertion hole to form an extended end 511, and a pressing inclined surface 5111 is provided on the extended end 511. When the chamfering cutter 12 of the rod is in the first chamfer position, in the conveying direction of the bolt 10, the extended end 511 is located in front of the stop surface 41, and the stop surface 41 abuts against the extended end 511 to restrict the extended end 511 from rotating backward. The tool holder 11 is also provided with a pushing surface 113, which is located in front of the chamfering tool 12 of the rod. After the rod 102 is chamfered, the bolt 10 continues to be conveyed forward. The end face of the rod 102 can push the pushing surface 113 to drive the sliding seat 15 away from the stop surface 41, so that the extended end 511 can pass the limit block 4 and rotate backward. After the extended end 511 rotates backward and passes the limit block 4, when the extended end 511 is driven to rotate forward, the pressing inclined surface 5111 can press against the limiting pressing surface 42, pressing the extended end 511 back into the telescopic insertion hole, so that the extended end 511 can pass the limit block 4 and rotate forward.

[0048] like Figures 4 to 6 As shown, the tool changer drive unit can drive the chamfering tool 12 on the lever to switch between the first chamfering position and the first idle position. The tool changer drive unit includes an axial rack 31, a sliding rod 32, a pressing block 33, a pressing elastic element 34, a pin 35, a connecting elastic element 36, and a connecting frame 37. The connecting frame 37 includes a radial support 371 and an axial support 372. The radial support 371 is fixedly mounted on the wall of the mounting groove 211, and the axial support 372 is fixedly connected to the radial support 371. The length direction of the axial support 372 is parallel to the axis of the tool mounting seat 21. The sliding rod 32 is slidably mounted on the axial support 372 along the axis of the tool mounting seat 21, and the axial rack 31 is fixedly mounted on the sliding rod 32. The length direction of the axial rack 31 is parallel to the axis of the tool mounting seat 21. A gear 114 is coaxially fixed at one end of the rotating shaft 112, and the axial rack 31 meshes with the gear 114. The rotating shaft 112 is also equipped with a reset torsion spring (not shown in the figure). When the reset torsion spring is in its natural state, the chamfering blade 12 on the rod is in the first chamfer position.

[0049] like Figures 4 to 6 , Figure 16 , Figure 17As shown, a radial groove 321 extending radially along the tool mounting seat 21 is provided on the sliding rod 32, and the pressing block 33 is slidably disposed in the radial groove 321. The pressing elastic element 34 is a spring, located in the radial groove 321. One end of the pressing elastic element 34 is fixedly connected to the pressing block 33, and the other end of the pressing elastic element 34 is fixedly connected to the bottom wall of the radial groove 321. When the pressing elastic element 34 is in its natural state, the pressing block 33 partially extends out of the radial groove 321 to form an overhang end 331, and the overhang end 331 is provided with a pressing inclined surface 3311. In the conveying direction of the bolt 10, the pressing inclined surface 3311 is inclined from back to front toward the axis of the tool mounting seat 21. When the bolt 10 is conveyed through the pressing inclined surface 3311, the end face of the head 101 of the bolt 10 near the rod portion 102 can abut against the pressing inclined surface 3311. The sliding rod 32 also has a slot 322 extending along the axis of the tool mounting seat 21, which communicates with the radial groove 321. A portion of the pin 35 is slidably disposed within the slot 322, and the pin 35 is connected to the sliding rod 32 via a spring-loaded elastic element 36. Specifically, a mounting box 38 is fixedly disposed on the sliding rod 32, and a mounting hole 381 is formed on the side of the mounting box 38 facing the sliding rod 32. The mounting hole 381 extends axially along the tool mounting seat 21, and the pin 35 is axially slidably mounted within the mounting hole 381. The spring-loaded elastic element 36 is located within the mounting hole 381, with one end fixedly connected to the bottom wall of the mounting hole 381 and the other end fixedly connected to the pin 35. When the insertion elastic element 36 is in its natural state, the pin 35 extends out of the mounting hole 381, and a portion of the pin 35 is located in the slot 322. The portion of the pin 35 located in the slot 322 can abut against the pressing block 33 to prevent the overhanging end 331 from retracting into the radial groove 321. An ejector block 373 is also fixed on the radial support 371. The axial rack 31 moves toward the ejector block 373, and the ejector block 373 can eject the pin 35 from the slot 322. The pin 35 no longer abuts against the pressing block 33. At this time, the head chamfering cutter 13 is in the second chamfer position, the bolt 10 continues to be fed, and the head 101 of the bolt 10 can squeeze the overhanging end 331 back into the radial groove 321.

[0050] like Figure 1 and Figure 4 As shown, the unloading conveying mechanism is located on the side of the chamfering mechanism away from the loading conveying mechanism. The unloading conveying mechanism includes a gripper cylinder 6 and an electric push rod (not shown in the figure). The gripper 61 of the gripper cylinder 6 can grip the rod portion 102 of the bolt 10. The electric push rod is fixed on the mounting bracket 23. The gripper cylinder 6 is fixed on the telescopic rod of the electric push rod. The electric push rod can drive the gripper cylinder 6 to move along the axis of the tool mounting seat 21 while gripping the bolt 10.

[0051] like Figure 1As shown, the feeding and conveying mechanism includes a robotic arm (not shown in the figure), a belt conveyor, a load-bearing component, and a limiting component. Multiple load-bearing components are spaced apart along the length of the conveyor belt 7 of the belt conveyor. The robotic arm and belt conveyor are existing technologies, therefore their structure and working principle will not be described in detail.

[0052] like Figure 1 and Figure 18 As shown, the support assembly includes a head support 81 and a rod support 82. The head support 81 and rod support 82 are fixedly spaced on the conveyor belt 7, with the rod support 82 located in front of the head support 81 in the conveying direction of the bolt 10. The head support 81 includes a base 811 and a side baffle 812. The side baffle 812 abuts against the end face of the bolt head 101 away from the rod 102. The base 811 has a head support groove 813 adapted to the lower half of the bolt head 101. The rod support 82 has a rod support groove 821 adapted to the lower half of the bolt rod 102. During operation, the robotic arm grips the bolt 10 and places the bolt head 101 into the head support groove 813, while the end of the bolt rod 102 is placed into the rod support groove 821. Then, the conveyor belt 7 conveys the bolt 10.

[0053] like Figure 1 and Figure 18 As shown, the limiting assembly includes a fixing frame 91 and a limiting cover 92. The fixing frame 91 is fixed on the mounting frame 23, and the limiting cover 92 is fixed on the fixing frame 91. The limiting cover 92 is located above the conveying end of the conveyor belt 7, and the limiting cover 92 has a head limiting groove 921 that is adapted to the upper half of the head 101 of the bolt 10. When the head 101 of the bolt 10 is conveyed to the lower part of the limiting cover 92, the upper part of the head 101 enters the head limiting groove 921. At this time, the head 101 of the bolt 10 cannot rotate under the restriction of the limiting cover 92 and the base 811. At this time, the end of the shank 102 of the bolt 10 abuts against the shank chamfering cutter 12 in the first chamfering position. As the bolt 10 continues to be conveyed forward, the shank chamfering cutter 12 rotates with the tool mounting seat 21 to chamfer the shank 102 it contacts. After the shank 102 of the bolt 10 is chamfered, the gripper 61 of the control gripper cylinder 6 clamps the shank 102 of the bolt 10 and then drives the bolt 10 to continue to move along the axis of the tool mounting seat 21. At this time, the head 101 of the bolt 10 disengages from the head limiting groove 921.

[0054] like Figure 1 and Figure 4 As shown, a material collection box 24 is also fixed on the mounting frame 23. The material collection box 24 is located below the moving path of the bolt 10. The upper end of the material collection box 24 is provided with an opening for the bolt 10 to fall. The gripper cylinder 6 can hold the bolt 10, move it above the opening, and release the bolt 10.

[0055] The implementation principle of the chamfering device for bolt production in this embodiment of the invention is as follows: During use, a robotic arm grips a bolt 10, placing the head 101 of the bolt 10 in the head bearing groove 813 and the end of the shank 102 of the bolt 10 in the shank bearing groove 821. Then, the conveyor belt 7 transports the bolt 10. When the head 101 of the bolt 10 is transported below the limiting cover 92, the upper half of the head 101 enters the head limiting groove 921, and the end of the shank 102 of the bolt 10 abuts against the shank chamfering cutter 12 in the first chamfering position. The shank chamfering cutter 12 chamfers the contacting shank 102. When the end face of the shank 102 contacts the pushing surface 113 of the cutter holder 11, the chamfering of the shank 102 is completed. Then, the end face of the rod 102 pushes against the push surface 113, driving the sliding seat 15 away from the stop surface 41, so that the extended end 511 can pass over the limit block 4 and rotate backward. At this time, the sliding elastic element 16 is stretched. After the extended end 511 passes over the limit block 4, the sliding elastic element 16 drives the sliding seat 15 to reset. Then the bolt 10 continues to be conveyed forward. The rod 102 pushes against the push surface 113, causing the tool holder 11 to rotate. Then the tool holder 11 will abut against the outer peripheral surface of the rod 102. After the rod 102 of the bolt 10 passes through the tool mounting seat 21, the jaws 61 of the control jaw cylinder 6 clamp the rod 102 of the bolt 10, and then drive the bolt 10 to continue to move along the axis of the tool mounting seat 21. When the end face of the head 101 near the rod 102 abuts against the pressing slope 3311 of the overhanging end 331, the head 101 moves forward along with the sliding rod 32 and the axial rack 31. The axial rack 31 drives the gear 114, the rotating shaft 112, and the tool holder 11 to rotate. When the tool holder 11 rotates so that the head chamfering cutter 13 is in the second chamfering position, the head chamfering cutter 13 contacts the end of the head 101 away from the rod 102, and the head chamfering cutter 13 chamfers the head 101. After the chamfering is completed, the bolt 10 continues to be conveyed forward, the head 101 leaves the head chamfering cutter 13, the ejector block 373 pushes the pin 35 out of the slot 322, and the head 101 pushes the overhanging end 331 back into the radial groove 321, where the overhanging end 331 abuts against the outer circumferential surface of the head 101. The head 101 continues to be conveyed forward. When the cantilever end 331 no longer abuts against the outer circumferential surface of the head 101, the cutter holder 11 rotates to reset under the action of the reset torsion spring. During the rotation and reset process of the cutter holder 11, the limiting pressing surface 42 presses the extended end 511 back into the telescopic insertion hole, and the extended end 511 rotates forward past the limiting block 4. Then, the gripper cylinder 6 holds the chamfered bolt 10 and moves it above the opening of the unloading collection box 24. Then, the gripper cylinder 6 releases the bolt 10, and the bolt 10 falls into the unloading collection box 24.

[0056] When the chamfering device for bolt production of the present invention is used, after the shank 102 of the bolt 10 is chamfered, there is no need to remove the bolt 10 and reload it. The chamfering mechanism can chamfer the head 101 of the bolt 10, thereby improving the chamfering efficiency of the bolt 10.

[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A chamfering device for bolt production, comprising a feeding conveying mechanism for conveying bolts into a chamfering mechanism, a chamfering mechanism, and a discharging conveying mechanism for conveying the chamfered bolts out, characterized in that, The chamfering mechanism includes a tool assembly, a tool mounting base, a rotary drive, and a mounting frame. The tool mounting base is rotatably mounted on the mounting frame. The rotary drive is connected to the tool mounting base to drive the tool mounting base to rotate. The tool assembly includes a tool holder, a shank chamfering cutter, a head chamfering cutter, and a tool changing drive. The tool holder and tool changing drive are mounted on the tool mounting base. The shank chamfering cutter and the head chamfering cutter are mounted on the tool holder. When the tool mounting base rotates, it can synchronously rotate the shank chamfering cutter and the head chamfering cutter. The shank chamfering cutter has a first chamfering position and a first idle position, and the head chamfering cutter has a second chamfering position and a second idle position. When the shank chamfering... When the chamfering tool is in the first chamfering position, the head chamfering tool is in the second idle position. When the shank chamfering tool is in the first idle position, the head chamfering tool is in the second chamfering position. When the shank chamfering tool is between the first chamfering position and the first idle position, the head chamfering tool is between the second chamfering position and the second idle position. The tool changing drive can drive the shank chamfering tool to switch between the first chamfering position and the first idle position. When the shank chamfering tool is in the first chamfering position, the rotation of the shank chamfering tool can chamfer the shank of the bolt it contacts. When the head chamfering tool is in the second chamfering position, the rotation of the head chamfering tool can chamfer the head of the bolt it contacts.

2. The chamfering device for bolt production according to claim 1, characterized in that, The tool mount is a cylindrical structure with its axis of rotation collinear with its axis of rotation. A mounting groove is formed on the inner wall of the tool mount, and the tool changer drive is located within this groove. The tool holder rotates within the mounting groove, and its axis of rotation is perpendicular to the radial direction of the tool mount. A shank chamfering cutter and a head chamfering cutter are fixed at both ends of the tool holder, both located on the side of the tool holder closest to the tool mount's axis. Bolts can be conveyed axially along the tool mount and pass through it. In the bolt conveying direction, the shank chamfering cutter is located in front of the head chamfering cutter. When the shank chamfering cutter is in the first chamfering position, it extends beyond the mounting groove, and the distance from the shank chamfering cutter to the axis of the tool mount is less than the distance from the head chamfering cutter to the axis of the tool mount. When the head chamfering cutter is in the second chamfering position, it extends beyond the mounting groove, and the distance from the head chamfering cutter to the axis of the tool mount is less than the distance from the shank chamfering cutter to the axis of the tool mount.

3. The chamfering device for bolt production according to claim 2, characterized in that, A sliding seat is slidably provided along the axis of the tool mounting base within the mounting groove. The sliding seat is fixed to the groove wall via a sliding elastic element and has a shaft hole. A rotating connecting part is fixedly provided on the tool holder and is rotatably positioned within the mounting groove via a rotating shaft. A limiting block is fixedly provided within the mounting groove, and the limiting block has a stop surface and a limiting pressing surface. A telescopic insertion hole is provided on the rotating connecting part, and a stop and a telescopic elastic element are provided within the telescopic insertion hole. The stop is connected to the telescopic insertion hole via the telescopic elastic element, and one end of the stop extends out of the telescopic insertion hole to form an extended end. When the chamfering tool of the rod is in the first chamfer position, the stop surface abuts against the extended end to restrict the extended end from rotating backward. The tool holder also has a pushing surface. After the rod is chamfered, the end face of the rod can push against the pushing surface to drive the sliding seat away from the stop surface, so that the extended end can pass over the limiting block and rotate backward. The limiting pressing surface is an arc-shaped surface. When the extended end rotates forward, the limiting pressing surface can press the extended end back into the telescopic insertion hole.

4. The chamfering device for bolt production according to claim 3, characterized in that, The tool changer drive includes an axial rack, a sliding rod, a pressing block, a pressing elastic element, a pin, a plug-in elastic element, and a connecting frame. The connecting frame is fixed to the wall of the mounting slot. The sliding rod is axially slidably mounted on the connecting frame. The axial rack is fixed to the sliding rod. One end of the rotating shaft is fixed with a gear that meshes with the axial rack. A return torsion spring is also mounted on the rotating shaft. A radial groove is formed on the sliding rod. The pressing block is slidably mounted in the radial groove. The pressing elastic element connects the pressing block to the wall of the radial groove. The pressing block extends out of the radial groove to form an overhang. The overhang has a pressing inclined surface. An axially extending slot is formed on the sliding rod. The slot communicates with the radial groove. The pin is slidably mounted in the slot. The pin is connected to the sliding rod through the plug-in elastic element. An ejector block is also fixed on the connecting frame. The axial rack moves toward the ejector block. The ejector block can eject the pin from the slot. At this time, the head chamfering tool is in the second chamfer position. The bolt continues to be fed. The bolt head can squeeze the overhang back into the radial groove.

5. The chamfering device for bolt production according to claim 4, characterized in that, The end of the tool holder away from the head chamfering tool is also rotatably equipped with a roller, and the rotation axis of the roller is parallel to the rotation axis of the tool holder.

6. The chamfering device for bolt production according to any one of claims 3-5, characterized in that, The extended end is provided with a top pressing slope. When the extended end rotates forward, the top pressing slope can press against the limiting pressing surface, pressing the extended end back into the telescopic insertion hole.

7. The chamfering device for bolt production according to any one of claims 2-5, characterized in that, The unloading conveying mechanism is located on the side of the chamfering mechanism away from the loading conveying mechanism. The unloading conveying mechanism includes a gripper cylinder and an electric push rod. The gripper cylinder's gripper can hold the shank of the bolt. The electric push rod is fixed on the mounting frame, and the gripper cylinder is fixed on the telescopic rod of the electric push rod. The electric push rod can drive the gripper cylinder to move along the axis of the tool mounting seat while holding the bolt.

8. The chamfering device for bolt production according to claim 7, characterized in that, The feeding and conveying mechanism includes a belt conveyor, a bearing assembly, and a limiting assembly. The bearing assembly includes a head bearing seat and a rod bearing seat, which are fixedly spaced on the conveyor belt. In the bolt conveying direction, the rod bearing seat is located in front of the head bearing seat. The head bearing seat includes a base and a side baffle. The side baffle can abut against the end face of the bolt head away from the rod. A head bearing groove adapted to the lower half of the bolt head is formed on the base, and a rod bearing groove adapted to the lower half of the bolt rod is formed on the rod bearing seat. The limiting assembly includes a fixing frame and a limiting cover. The fixing frame is fixed on the mounting frame, and the limiting cover is fixed on the fixing frame. The limiting cover is located above the conveying end of the conveyor belt. A head limiting groove adapted to the upper half of the bolt head is opened on the limiting cover. The head bearing groove and the head limiting groove cooperate to prevent the bolt head from rotating. When the bolt head is disengaged from the head limiting groove, the jaws of the gripper cylinder clamp the rod of the bolt.

9. The chamfering device for bolt production according to claim 8, characterized in that, The load-bearing components are arranged at intervals along the length of the conveyor belt.

10. The chamfering device for bolt production according to claim 7, characterized in that, The mounting frame is also equipped with a material collection box, which is located below the movement path of the bolt. The upper end of the material collection box is provided with an opening for the bolt to fall. The gripper cylinder can hold the bolt, move it above the opening, and release the bolt.

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