High-strength bolt tapping device

Abstract

The invention relates to the technical field of bolt production and machining, in particular to a high-strength bolt tapping device which comprises a rack, a turning tool and a sliding frame are arranged on the rack, a main shaft is arranged in the sliding frame and can clamp one end of a cylindrical bar, and a rotating guide sleeve is further arranged on the rack to position the other end of the cylindrical bar. An auxiliary positioning assembly is arranged in the rotating guide sleeve and can enable the positioned position of the periphery of the cylindrical bar to be close to the turning tool, and the positioned position does not change. Therefore, the problem that the thread turning precision is reduced due to the fact that the positioning position of the periphery of the cylindrical bar is too far away from a turning tool or the cylindrical bar is separated from the auxiliary positioning assembly is solved, positioning of different diameters of the cylindrical bar can be matched, and meanwhile segmented machining is not needed when long threads are machined on the cylindrical bar. And the required length is directly machined, so that the machining efficiency of the thread with the longer length is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of bolt production and processing, in particular to a high-strength bolt tapping device. Background Art

[0002] Bolts have a wide range of applications and there are many types of bolts. Bolt production and processing is aimed at producing bolts suitable for use in different occasions. Different bolts use different processing methods.

[0003] For example, a bolt tapping device grinds the surface of the bolt to produce threads. Specifically, a grinding tool is arranged on the frame, and the other end of the bolt is clamped by a Swiss machine. The Swiss machine drives the bolt to rotate at high speed as a whole and moves along the axial direction of the bolt to produce threads on the surface. However, when processing high-strength bolts and the bolts are long, the Swiss machine needs to process in sections to ensure the positioning effect of the guide sleeve on the bolt. That is, the grinding tool needs to be processed in sections, and the Swiss machine needs to clamp the bolt in sections. The Swiss machine needs to drive the bolt to move back and forth several times to complete the processing, which reduces efficiency. In addition, when positioning longer bolts, traditional guide sleeves will cause the bolts to be subjected to greater eccentric force, affecting the processing accuracy of the bolts. Summary of the invention

[0004] Based on this, it is necessary to provide a high-strength bolt tapping device to address the problems of low bolt processing efficiency and poor precision when processing longer bolts in the current bolt tapping device.

[0005] The above purpose is achieved through the following technical solutions: A high-strength bolt tapping device, comprising: A frame, wherein a main shaft and a rotating guide sleeve are arranged on the frame, wherein the main shaft can hold a cylindrical bar material and rotate around its own axis and move axially along the cylindrical bar material, wherein the rotating guide sleeve is rotatably arranged on the frame, wherein the cylindrical bar material is coaxial and penetrates the inner circumference of the rotating guide sleeve, wherein the main shaft is coaxial and telescopically connected to the rotating guide sleeve, wherein the main shaft drives the rotating guide sleeve to rotate synchronously; A driving assembly, wherein the driving assembly can drive the main shaft to rotate around its own axis and can drive the main shaft to move along its axial direction; A turning tool, the turning tool is arranged on the frame and close to one end of the rotating guide sleeve, and the turning tool can turn threads on the outer circumference of the cylindrical bar; The cam is an axially movable member connected to the guide rail, and the cam is adapted to move along the guide rail in an axial direction of the guide rail. A connecting rod, one end of which is hinged on the abutment block, and the other end of which is hinged on the inner circumference of the guide head, and the end of which is hinged on the inner circumference of the guide head can slide axially along the guide head, and during the axial movement of the cylindrical bar, different diameters of the outer circumference of the cylindrical bar abut against the connecting rod; When the abutment block is in a horizontal state, the abutment block abuts against the outer periphery of the cylindrical bar or the outer periphery of the processed thread; When the abutment block is in an inclined state, the abutment block abuts against the outer periphery of the cylindrical bar and the outer periphery of the processed thread simultaneously.

[0006] Furthermore, the auxiliary positioning assembly also includes a sliding rod and an elastic member, one end of the sliding rod is hinged in the middle of the abutment block, and the other end of the sliding rod slides and abuts against the inner circumference of the rotating guide sleeve, the inner circumference of the rotating guide sleeve has a first conical surface, and the end of the sliding rod abutting against the inner circumference of the rotating guide sleeve has a second conical surface, one end of the elastic member is connected to the guide head, and the other end of the elastic member is connected to the rotating guide sleeve, and the elastic member can push the guide head to move axially along the rotating guide sleeve.

[0007] Furthermore, a connecting plate is detachably provided between the elastic member and the guide head.

[0008] Furthermore, the elastic member is a compression spring.

[0009] Furthermore, a roller is rotatably provided on one end of the abutment block away from the connecting rod, and the axis of the roller is perpendicular to the axis of the cylindrical bar, and the roller is in rolling contact with the outer periphery of the cylindrical bar or the outer periphery of the processed thread.

[0010] Furthermore, a slide groove is opened on the inner wall of the guide head, and there are multiple slide grooves, which are arranged in a circular array on the inner periphery of the guide head, and extend along the axial direction of the guide head. A slider is hinged at one end of the connecting rod, and the slider is slidably arranged in the slide groove.

[0011] Furthermore, a telescopic sleeve is provided between the main shaft and the rotating guide sleeve, and the telescopic sleeve can be telescoped along the axial direction of the main shaft, one end of the telescopic sleeve is connected to the rotating guide sleeve, and the other end of the telescopic sleeve is connected to the main shaft.

[0012] Furthermore, the telescopic sleeve includes a first sleeve and a second sleeve, the first sleeve and the second sleeve are socketed with each other, a side wall of the first sleeve is provided with a limiting groove distributed along its axial direction, a protrusion is provided on the outer periphery of the second sleeve, the protrusion is located in the limiting groove, and the ends of the first sleeve and the second sleeve that are away from each other are respectively connected to the main shaft and the rotating guide sleeve.

[0013] Furthermore, the driving assembly includes a first driving motor and a second driving motor, the rotating shaft of the first driving motor is engaged with the main shaft, the rotation of the first driving motor drives the main shaft to rotate, a sliding frame is provided on the frame, the sliding frame can move on the frame along the axial direction of the main shaft, and the second driving motor can drive the sliding frame to move.

[0014] The beneficial effects of the present invention are: The present invention provides an auxiliary positioning component inside the rotating guide sleeve. The auxiliary positioning component can make the outer periphery of the cylindrical bar material be positioned close to the turning tool and the positioning position does not change, thereby preventing the problem of reduced turning thread accuracy caused by the outer periphery of the cylindrical bar material being positioned too far from the turning tool or being separated from the auxiliary positioning component. It can adapt to the positioning of cylindrical bars with different diameters, and at the same time, the cylindrical bar material does not need to be processed in sections when processing longer threads, but can be directly processed to the required length, thereby greatly improving the processing efficiency of longer threads.

[0015] The present invention provides a roller rotatably disposed on the abutment block, and the roller can convert sliding friction into rolling friction, thereby reducing the friction force of the abutment block on the outer periphery of the cylindrical bar when the abutment block is in a tilted state. At the same time, the setting of the roller can reduce the wear on the processed surface of the cylindrical bar, further improving the accuracy of thread processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a high-strength bolt tapping device provided by one embodiment of the present invention; Figure 2A schematic structural diagram of a spindle and a rotating guide sleeve of a high-strength bolt tapping device provided in one embodiment of the present invention; Figure 3 for Figure 2 A top view of a spindle and a rotating guide sleeve of a high-strength bolt tapping device provided in one embodiment; Figure 4 for Figure 3 A cross-sectional view of a main shaft and a rotating guide sleeve of a high-strength bolt tapping device provided in an embodiment of the present invention along AA; Figure 5 for Figure 4 A partial enlarged view of the X portion when the main shaft and the abutment block in the rotating guide sleeve of the high-strength bolt tapping device provided in one embodiment are in the first state; Figure 6 for Figure 4 A partial enlarged view of the X portion when the main shaft and the inner abutment block of the rotating guide sleeve of the high-strength bolt tapping device provided in one embodiment are in the second state; Figure 7 A cross-sectional view of a spindle and a rotating guide sleeve of a high-strength bolt tapping device provided in one embodiment of the present invention; Figure 8 for Figure 7 A partial enlarged view of the main shaft and the rotating guide sleeve Y portion of the high-strength bolt tapping device provided in one embodiment; Fig. 9 A schematic structural diagram of a guide head of a high-strength bolt tapping device provided in one embodiment of the present invention; Fig.10 for Fig. 9 A cross-sectional view of a guide head of a high-strength bolt tapping device provided in one embodiment.

[0017] in: 100, frame; 110, sliding frame; 120, spindle; 130, rotating guide sleeve; 140, first tapered surface; 150, turning tool; 200, guide head; 201, slide groove; 210, abutment block; 211, roller; 220, connecting rod; 230, sliding rod; 231, second conical surface; 240, elastic member; 250, connecting plate; 300, telescopic sleeve; 310, first sleeve; 311, limiting groove; 320, second sleeve; 321, protrusion; 400, Cylindrical bars. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0020] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] Refer to the following Figure 1-Figure 10 A high-strength bolt tapping device provided by the present invention is described.

[0022] A high-strength bolt tapping device, suitable for tapping bolts with a longer length, includes a frame 100, a central movement mechanism is arranged on the frame 100, the central movement mechanism includes a spindle 120 and a rotating guide sleeve 130, the spindle 120 can clamp one end of a cylindrical bar 400 for rotation, the spindle 120 drives the cylindrical bar 400 to rotate around its own axis, and a sliding frame 110 is also arranged on the frame 100, the spindle 120 is located inside the sliding frame 110, the sliding frame 110 can drive the spindle 120 to move along the axial direction of the spindle 120, so that the spindle 120 drives the cylindrical bar 400 to rotate around its own axis. The material 400 moves axially. Since the spindle 120 clamps one end of the cylindrical bar 400, it is necessary to rotate the guide sleeve 130 to limit the other end of the cylindrical bar 400. The cylindrical bar 400 is coaxial and penetrates the inner circumference of the rotating guide sleeve 130. The rotating guide sleeve 130 is rotatably set on the frame 100, and is specifically connected to the frame 100 through a bearing (not shown in the figure). The spindle 120 is coaxially connected with the rotating guide sleeve 130. The spindle 120 can drive the rotating guide sleeve 130 to rotate synchronously, but the spindle 120 cannot drive the rotating guide sleeve 130 to move axially.

[0023] A turning tool 150 is provided on the frame 100, and the turning tool 150 is provided at a position close to one end of the rotating guide sleeve 130. When the spindle 120 drives the cylindrical bar 400 to rotate and axially extends out of the rotating guide sleeve 130, the turning tool 150 abuts against the outer circumference of the cylindrical bar 400 to turn threads on the outer circumference of the cylindrical bar 400. The bolt tapping device in the prior art can generally only process bolts of shorter lengths. When processing longer bolts, since the portion of the outer circumference of the cylindrical bar 400 that needs to be turned into threads will be turned first, the diameter of this portion will be reduced, thereby causing a gap to be generated between the rotating guide sleeve 130 that can originally play a positioning role and the cylindrical bar 400 with the threaded portion, resulting in the rotating guide sleeve 130 being unable to continue to play a positioning role. Therefore, the prior art adopts a method of clamping the cylindrical bar 400 in sections to overcome this problem. Figure 5 As shown, in the prior art, the outer circumference of the rightmost cylindrical bar 400 is first turned into a thread, and then the spindle 120 extends the cylindrical bar 400 to the right so that the rotating guide sleeve 130 positions the unturned outer circumference of the cylindrical bar 400, and then repeats the above operation until the thread of the required length is turned and stops. As a result, when the prior art processes longer bolts, the efficiency is greatly reduced. When the positioning length of the rotating guide sleeve 130 is set too long, the distance between the turning position and the positioning position of the cylindrical bar 400 is too large, which easily causes the cylindrical bar 400 to be subjected to a large eccentric force during turning, thereby reducing the accuracy of the turned thread.

[0024] The present invention is provided with an auxiliary positioning component inside the rotating guide sleeve 130. The auxiliary positioning component can make the outer periphery of the cylindrical bar 400 be positioned close to the turning tool 150 and the positioning position does not change, thereby preventing the problem of reduced turning thread accuracy caused by the outer periphery of the cylindrical bar 400 being positioned too far from the turning tool 150 or being separated from the auxiliary positioning component. At the same time, when processing longer threads, the cylindrical bar 400 does not need to be processed in sections, but can be directly processed to the required length, thereby greatly improving the processing efficiency of longer threads.

[0025] Specifically, the auxiliary positioning assembly of the present invention includes a guide head 200 and a plurality of abutment blocks 210. The guide head 200 is slidably arranged on the inner circumference of the rotating guide sleeve 130 and can slide axially along the inner circumference of the rotating guide sleeve 130. The guide head 200 is hollow inside, and the cylindrical bar 400 passes through the guide head 200. The plurality of abutment blocks 210 are slidably arranged on the side wall of the guide head 200. The plurality of abutment blocks 210 can slide radially along the guide head 200 so that the abutment blocks 210 can abut against the outer circumference of the cylindrical bar 400. A connecting rod 220 is hinged on the abutment block 210, and the other end of the connecting rod 220 is slidably hinged on the inner circumferential wall of the guide head 200, as shown in FIG. Figure 5As shown, the hinge position of the connecting rod 220 and the abutment block 210 is on the left side of the abutment block 210. When the abutment block 210 passes through the positions of different diameters on the outer circumference of the cylindrical bar 400, that is, the transition zone between the unprocessed thread and the processed thread on the surface of the cylindrical bar 400, the transition zone of the cylindrical bar 400 will push the connecting rod 220, so that the connecting rod 220 moves radially outward along the guide head 200, and the connecting rod 220 drives the abutment block 210 to move. The state of the abutment block 210 has a first state and a second state.

[0026] When in the first state, the abutment block 210 abuts parallel to the unmachined surface or the surface of the machined thread of the cylindrical bar 400. When in the second state, the abutment block 210 abuts obliquely against the unmachined surface and the machined surface of the cylindrical bar 400, that is, abuts against the transition zone. Since the diameter of the machined surface is smaller than the diameter of the unmachined surface, the abutment block 210 is in an inclined state, but the abutment block 210 can still abut against the outer circumference of the cylindrical bar 400 to play a positioning role, which makes it possible to process longer threads without the need to segmentally position the outer circumference of the cylindrical bar 400, thereby improving the processing efficiency.

[0027] It should be noted that the diameter of the processed surface of the cylindrical bar 400 is smaller than the diameter of the unprocessed surface. This is because one end of the bolt has a hexagonal head, so the hexagonal head structure needs to be reserved when the bolt is processed, which makes the diameter of the processed surface smaller than the diameter of the unprocessed surface.

[0028] More specifically, the abutment block 210 can always abut against the outer periphery of the cylindrical bar 400 through the following structure, that is, the auxiliary positioning assembly further includes a sliding rod 230 and an elastic member 240, the sliding rod 230 is slidably arranged on the side wall of the guide head 200 and is radially distributed along the side wall of the guide head 200, in order to facilitate the arrangement of the sliding rod 230, as shown in FIG. Figure 8 As shown, a plurality of square holes extending in the radial direction are provided on the side wall of the guide head 200, and the cross section of the sliding rod 230 is also square. The sliding rod 230 is slidably arranged in the square hole. One end of the sliding rod 230 is located inside the guide head 200 and is hinged to the middle of the abutment block 210, and the other end of the sliding rod 230 is slidably abutted against the inner periphery of the rotating guide sleeve 130. The inner periphery of the rotating guide sleeve 130 has a first conical surface 140, as shown in FIG. Figure 5As shown, the small end of the first conical surface 140 faces outward and the large end faces inward, and the sliding rod 230 has a second conical surface 231 on one end that slides against the inner circumference of the guide head 200. The second conical surface 231 is adapted to the first conical surface 140. When the abutment block 210 is subjected to a radial force, it will push the connecting rod 220 to axially translate in the rotating guide sleeve 130. Since the connecting rod 220 is arranged on the side wall of the guide head 200, it can drive the guide head 200 to move along its own axial direction. The elastic member 240 is arranged between the guide head 200 and the rotating guide sleeve 130, as shown in FIG. Figure 4 and Figure 5 As shown, one end of the elastic member 240 is fixed on the rotating guide sleeve 130, and the other end of the elastic member 240 is connected to the guide head 200. The elastic member 240 is in a compressed state, so that the guide head 200 has a tendency to move to the right, which enables the sliding rod 230 to push the abutment block 210 to abut against the outer periphery of the cylindrical bar 400, thereby positioning the cylindrical bar 400.

[0029] When the main shaft 120 drives the cylindrical bar 400 to move in the axial direction and causes the transition zone on the cylindrical bar 400 to pass through the abutment block 210, the abutment block 210 will switch from the parallel state to the inclined state through the connecting rod 220. Figure 6 The status changes to Figure 5 As shown in the state change, the guide head 200 will be pushed to move to the left. This is because after the abutment block 210 changes from the parallel state to the inclined state, the sliding rod 230 hinged in the middle of the abutment block 210 slides from right to left on the first conical surface 140 on the inner circumference of the rotating guide sleeve 130, thereby driving the guide head 200 to move to the left. At this time, the elastic member 240 is still compressed. The elastic force of the elastic member 240 enables the abutment block 210 in the inclined state to still play a positioning role, thereby preventing the cylindrical bar 400 from escaping from the positioning of the abutment block 210.

[0030] Specifically, to facilitate the installation of the guide head 200 and the elastic member 240 , a connecting plate 250 is detachably mounted on one end of the guide head 200 close to the elastic member 240 , which is detachably connected by screws, and the other end of the connecting plate 250 is abutted by the elastic member 240 .

[0031] It should be noted that the elastic member 240 in the embodiment of the present invention is a compression spring, and the elastic coefficient of the compression spring is related to the size of the processed thread. When the processing size of the thread is larger, the turning tool 150 needs to have a greater turning force on the cylindrical bar 400, that is, the abutment block 210 needs to have a larger abutment force, so as to avoid the positioning function of the abutment block 210 from failing. Therefore, an elastic member 240 with a larger elastic coefficient is required. Similarly, when the processing size of the thread is smaller, a larger abutment force is not required, so it can be replaced with an elastic member 240 with a smaller elastic coefficient.

[0032] In a further embodiment, a roller 211 is rotatably connected to one end of the abutment block 210 of the present invention that is away from the hinged connection with the connecting rod 220, and the axis of the roller 211 is perpendicular to the axis of the cylindrical bar 400. When the abutment block 210 abuts against the cylindrical bar 400, the roller 211 can roll and contact with the outer circumference of the cylindrical bar 400. Figure 6 As shown, when the abutment block 210 is in a tilted state, the roller 211 can tightly abut against the outer periphery of the cylindrical bar 400, and because the cylindrical bar 400 needs to move axially relative to the guide head 200, the setting of the roller 211 can convert the sliding friction into rolling friction, thereby reducing the friction force of the abutment block 210 on the outer periphery of the cylindrical bar 400 when the abutment block 210 is in a tilted state. At the same time, the setting of the roller 211 can reduce the wear on the processed surface of the cylindrical bar 400 and improve the accuracy of thread processing.

[0033] Specifically, in order to enable the connecting rod 220 to slide in the guide head 200, a plurality of slide grooves 201 are provided on the side wall of the guide head 200. The plurality of slide grooves 201 are arranged in a circular array on the inner circumference of the guide head 200, and the slide grooves 201 extend along the axial direction of the guide head 200. Figure 5 , Fig. 9 and Fig.10 As shown, one end of the connecting rod 220 is hinged with a slider, and the slider is slidably set in the slide groove 201, so that one end of the connecting rod 220 is slidably hinged in the guide head 200. When the transition zone of the outer circumference of the cylindrical bar 400 passes through the connecting rod 220, the transition zone position of the cylindrical bar 400 abuts against the inner side of the connecting rod 220, and because one end of the connecting rod 220 is slidably hinged in the guide head 200, the connecting rod 220 can drive the abutment block 210 to move radially outward along the guide head 200, that is, drive the sliding rod 230 to move outward, as shown in FIG. Figure 6 As shown, the cylindrical bar 400 is set to move from left to right, and different diameter positions on the cylindrical bar 400, that is, the transition zone, will abut against the connecting rod 220. Since the connecting rod 220 is in an inclined state, as the cylindrical bar 400 moves from left to right, the connecting rod 220 will be pushed by the cylindrical bar 400 and drive the abutment block 210 to be in an inclined state. When the abutment block 210 is in an inclined state, it can still tightly abut against the outer periphery of the cylindrical bar 400 to play a positioning role.

[0034] More specifically, in order to realize the function that the main shaft 120 can rotate synchronously with the rotating guide sleeve 130 but the main shaft 120 and the rotating guide sleeve 130 can move axially relative to each other, a telescopic sleeve 300 is arranged between the main shaft 120 and the rotating guide sleeve 130, and the telescopic sleeve 300 includes a first sleeve 310 and a second sleeve 320, and the first sleeve 310 and the second sleeve 320 are connected to each other. A limiting groove 311 distributed along its axial direction is opened on the side wall of the first sleeve 310, and a protrusion 321 is fixedly arranged on the outer periphery of the second sleeve 320, and the protrusion 321 is located in the limiting groove 311, and the protrusion 321 can slide along the limiting groove 311 in the limiting groove 311. Through the arrangement of the protrusion 321 and the limiting groove 311, the first sleeve 310 and the second sleeve 320 can move axially relative to each other but the two cannot rotate relative to each other, and the first sleeve 310 is away from One end connected to the second sleeve 320 is slidably connected to the main shaft 120, and the connection method is the same as the connection method between the first sleeve 310 and the second sleeve 320, so that the main shaft 120 can slide axially relative to the first sleeve 310, which can increase the axial movement distance of the cylindrical bar 400 driven by the main shaft 120, and the second sleeve 320 is fixed on the rotating guide sleeve 130 away from the end connected to the first sleeve 310. When the main shaft 120 rotates, it can drive the rotating guide sleeve 130 to rotate synchronously through the first sleeve 310 and the second sleeve 320. When the main shaft 120 moves axially, since the rotating guide sleeve 130 is rotatably connected to the frame 100, the rotating guide sleeve 130 cannot move. Therefore, when the main shaft 120 moves axially, the first sleeve 310 and the second sleeve 320 can extend and retract, thereby adapting to the processing steps of the cylindrical bar 400.

[0035] It should be noted that the structure that can realize the telescopic connection between the main shaft 120 and the rotating guide sleeve 130 is not limited to the structure of the telescopic sleeve 300 described above. For example, multiple telescopic rods are used to connect the main shaft 120 and the rotating guide sleeve 130. One end of the multiple telescopic rods is evenly distributed on the main shaft 120 in the circumferential direction and is fixedly connected. The axes of the multiple telescopic rods are parallel to the axis of the main shaft 120. The other ends of the multiple telescopic rods are fixedly connected to the rotating guide sleeve 130 and are also evenly distributed in the circumferential direction and are also fixedly connected, so that the main shaft 120 and the rotating guide sleeve 130 can realize the function of synchronous rotation and telescopic. Of course, other telescopic structures are also possible, which are not specifically limited here.

[0036] In a further embodiment, a driving assembly is disposed on the frame 100 , and the driving assembly can drive the main shaft 120 to rotate around its own axis and move along the axial direction of the main shaft 120 at the same time.

[0037] Specifically, the driving assembly includes a first driving motor (not shown in the figure) and a second driving motor (not shown in the figure). The first driving motor is fixedly arranged in the sliding frame 110, and the rotating shaft of the first driving motor is meshed with the main shaft 120. When the first driving motor rotates, it can drive the main shaft 120 to rotate around its own axis, and the second driving motor is fixedly arranged on the frame 100. A slide rail (not shown in the figure) is provided at the sliding connection between the frame 100 and the sliding frame 110. The slide rail extends along the axial direction of the main shaft 120. A rack (not shown in the figure) is provided in the slide rail. The rotating shaft of the second driving motor is meshed with the rack. Therefore, when the second driving motor rotates, the sliding frame 110 can be driven to move through the meshing of the rotating shaft and the rack, and the main shaft 120 on the sliding frame 110 moves along its axial direction.

[0038] It should be noted that the driving component is not limited to the above structure, but can also be other driving elements, which are not specifically limited here.

[0039] The specific working process of a high-strength bolt tapping device provided by the present invention is described in combination with the above embodiments: The cylindrical bar stock 400 to be threaded is clamped on the spindle 120, as shown in FIG. Figure 4 and Figure 5 As shown, the cylindrical bar 400 passes through the first sleeve 310, the second sleeve 320, the guide head 200 and the rotating guide sleeve 130, thereby extending a distance and approaching the turning tool 150. At this time, the elastic member 240 is in a compressed state, and the elastic member 240 pushes the guide head 200 to have a tendency to move to the right. The guide head 200 pushes the sliding rod 230 to move on the first conical surface 140 on the inner periphery of the rotating guide sleeve 130. Under the action of the first conical surface 140, the sliding rod 230 moves toward the direction close to the cylindrical bar 400 and then pushes the abutment block 210 to abut against the outer periphery of the cylindrical bar 400. There are multiple abutment blocks 210 and the abutment blocks 210 are arranged in a circular array on the outer periphery of the cylindrical bar 400, thereby being able to position the cylindrical bar 400 and prevent the cylindrical bar 400 from shifting.

[0040] After adjusting the angle of the turning tool 150 and the rotation speed of the first drive motor and the second drive motor, the surface of the cylindrical bar 400 is processed with threads. First, the area on the cylindrical bar 400 that needs to be processed with threads is turned as a whole, and the diameter of the area is turned to be smaller than the area where the threaded part does not need to be processed, so as to reserve an area for processing the hexagonal head of the bolt.

[0041] After turning, the area with a smaller diameter is threaded. As the cylindrical bar 400 rotates and moves axially, threads are gradually machined on the surface of the cylindrical bar 400. Since the required threads cannot be machined at one time during the machining process but need to be machined layer by layer, it is similar to grinding and turning shaft parts. The bar needs to be turned layer by layer to achieve the required size. Therefore, after the spindle 120 moves the cylindrical bar 400 from the left end to the right end, it needs to return from the right end to the left end to perform multiple turning operations. The required threads are gradually formed by cutting. During the reciprocating movement of the cylindrical bar 400, different diameter areas of the outer circumference of the cylindrical bar 400 will pass through the inclined connecting rod 220, that is, the transition zone between the processed threads and the unprocessed threads on the outer circumference of the cylindrical bar 400 will pass through the connecting rod 220. Under the action of the connecting rod 220, the abutment block 210 can smoothly pass through the transition zone of the outer circumference of the cylindrical bar 400, and the abutment block 210 can still tightly abut against the outer circumference of the cylindrical bar 400 when passing through.

[0042] In the process of the transition zone moving from the position of the connecting rod 220 to the position of the abutment block 210, the connecting rod 220 will be squeezed by the transition zone to move in the direction away from the transition zone, and the connecting rod 220 drives one end of the abutment block 210 to move synchronously. Since the middle position of the abutment block 210 is hinged to the sliding rod 230, the abutment block 210 deflects around the middle hinge position, so that the abutment block 210 is in an inclined state. The abutment block 210 will press the sliding rod 230, so that the sliding rod 230 slides on the first conical surface 140. The sliding rod 230 drives the guide head 200 to move to the left, thereby compressing the elastic member 240. The reaction of the elastic member 240 makes the abutment block 210 tightly abut against the outer periphery of the cylindrical bar 400. At the same time, the roller 211 rotatably connected on the other end of the abutment block 210 rolls in contact with the surface of the threaded cylindrical bar 400, thereby reducing the friction force on the axial movement of the cylindrical bar 400. Then, the abutment block 210 gradually returns to the state as shown in FIG. Figure 5 In the state shown, when the transition zone of the cylindrical bar 400 passes through the abutment block 210, the cylindrical bar 400 can be positioned throughout the entire process, thereby improving the positioning accuracy of the cylindrical bar 400, and further improving the accuracy of thread processing.

[0043] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A high-strength bolt tapping device, characterized in that: include: A frame, wherein a main shaft and a rotating guide sleeve are arranged on the frame, wherein the main shaft can hold a cylindrical bar material and rotate around its own axis and move axially along the cylindrical bar material, wherein the rotating guide sleeve is rotatably arranged on the frame, wherein the cylindrical bar material is coaxial and penetrates the inner circumference of the rotating guide sleeve, wherein the main shaft is coaxial and telescopically connected to the rotating guide sleeve, wherein the main shaft drives the rotating guide sleeve to rotate synchronously; A driving assembly, wherein the driving assembly can drive the main shaft to rotate around its own axis and can drive the main shaft to move along its axial direction; A turning tool, the turning tool is arranged on the frame and close to one end of the rotating guide sleeve, and the turning tool can turn threads on the outer circumference of the cylindrical bar; The cam is an axially movable member connected to the guide rail, and the cam is adapted to move along the guide rail in an axial direction of the guide rail. A connecting rod, one end of which is hinged on the abutment block, and the other end of which is hinged on the inner circumference of the guide head, and the end of which is hinged on the inner circumference of the guide head can slide axially along the guide head, and during the axial movement of the cylindrical bar, different diameters of the outer circumference of the cylindrical bar abut against the connecting rod; When the abutment block is in a horizontal state, the abutment block abuts against the outer periphery of the cylindrical bar or the outer periphery of the processed thread; When the abutment block is in an inclined state, the abutment block abuts against the outer periphery of the cylindrical bar and the outer periphery of the processed thread simultaneously.

2. The high-strength bolt tapping device according to claim 1, characterized in that: A connecting plate is detachably provided between the elastic member and the guide head.

3. The high-strength bolt tapping device according to claim 1, characterized in that: The elastic member is a compression spring.

4. The high-strength bolt tapping device according to claim 1, characterized in that: A roller is rotatably arranged on one end of the abutment block away from the connecting rod, and the axis of the roller is perpendicular to the axis of the cylindrical bar stock. The roller is in rolling contact with the outer periphery of the cylindrical bar stock or the outer periphery of the processed thread.

5. The high-strength bolt tapping device according to claim 1, characterized in that: A slide groove is provided on the inner wall of the guide head, and there are multiple slide grooves. The multiple slide grooves are arranged in a circular array on the inner periphery of the guide head, and the multiple slide grooves extend along the axial direction of the guide head. A slider is hinged at one end of the connecting rod, and the slider is slidably arranged in the slide groove.

6. The high-strength bolt tapping device according to claim 1, characterized in that: A telescopic sleeve is arranged between the main shaft and the rotating guide sleeve. The telescopic sleeve can be telescoped along the axial direction of the main shaft. One end of the telescopic sleeve is connected to the rotating guide sleeve, and the other end of the telescopic sleeve is connected to the main shaft.

7. The high-strength bolt tapping device according to claim 6, characterized in that: The telescopic sleeve includes a first sleeve and a second sleeve, the first sleeve and the second sleeve are sleeved with each other, a side wall of the first sleeve is provided with a limiting groove distributed along its axial direction, a protrusion is provided on the outer periphery of the second sleeve, and the protrusion is located in the limiting groove, and the ends of the first sleeve and the second sleeve that are away from each other are respectively connected to the main shaft and the rotating guide sleeve.

8. The high-strength bolt tapping device according to claim 1, characterized in that: The driving assembly includes a first driving motor and a second driving motor, the rotating shaft of the first driving motor is engaged with the main shaft, the rotation of the first driving motor drives the main shaft to rotate, a sliding frame is provided on the frame, the sliding frame can move on the frame along the axial direction of the main shaft, and the second driving motor can drive the sliding frame to move.

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