CN118386190A

CN118386190A - Stud machining device

Info

Publication number: CN118386190A
Application number: CN202410541237.4A
Authority: CN
Inventors: 黄国柱; 静丰羽; 陈久甜; 李军涛; 苏黎明; 娄本启; 龚江斌; 陈辉
Original assignee: PowerChina Henan Electric Power Equipment Co Ltd
Current assignee: PowerChina Henan Electric Power Equipment Co Ltd
Priority date: 2024-04-30
Filing date: 2024-04-30
Publication date: 2024-07-26

Abstract

The stud bolt machining device comprises a workbench, wherein a supporting frame is arranged on the upper surface of the workbench through a sliding rail, a supporting cylinder with left and right opening ends is arranged at the upper end of the supporting frame, and a driving mechanism and a clamping mechanism are coaxially arranged in the supporting cylinder left and right; the clamping mechanism comprises an end face driving part and a hexagonal clamping part, wherein the end face driving part and the hexagonal clamping part are coaxially arranged; when the stud bolts are inserted into the clamping mechanism, the driving mechanism drives the hexagonal clamping parts to clamp the hexagonal structure in the middle of the stud bolts through extrusion force generated by the stud bolts; a stud machining device for realizing fixed spacing effect can realize the restriction of full degree of freedom in stud installation automatically.

Description

Stud machining device

Technical Field

The invention relates to a machine tool accessory of thread cutting equipment, in particular to a stud bolt machining device for realizing fixed limiting function during thread cutting.

Background

The stud, also called stud or stud, is mainly used for connecting two different equipment parts to achieve the functions of fixing and linking. The stud has a special structure, the two ends of the stud are provided with the same-direction threads or reverse threads, the nominal diameters of the stud are different, the length of the stud can reach 1 meter to two meters, and the stud is difficult to manually carry and fix. The screw rod part in the middle of the partial stud bolt is provided with a hexagonal structure, and is widely used for electric power fittings, special fasteners, rail transit, mining machinery, bridges, automobiles, motorcycles, boiler steel structures, hanging towers, large-span steel structures, large-scale buildings and the like.

The inventor knows a dibit quick change chuck screw mounting fixture (CN 202321638978.1), including supporting section bar, mechanism fixed plate and quick change chuck board, the push cylinder that is connected with electronic tightening axle is connected with to top one side of electronic tightening axle, equipment resets, electronic tightening axle is moved back to supreme spacing, quick change actuating cylinder pulls up first inclined plane round pin, the second tangent plane round pin withdraws under the spring effect, the first stopper of criticizing is installed to bottom one side of electronic tightening axle, the mechanism fixed plate is installed to bottom one side of supporting section bar, the inside mosaic of mechanism fixed plate is installed electric appliance connecting plug, make mechanism fixed plate in the anchor clamps and quick change chuck board laminating, electrical connection plug automatic connection gas circuit and signal this moment, the feed pipe is installed to the top one side of the left and right sides of mechanism fixed plate, the quick change chuck board is installed to bottom one side of mechanism fixed plate, and the left and right sides fixed mounting of quick change actuating mechanism has quick change actuating mechanism, the bottom one side of quick change chuck board is fixedly installed the dibit switching chuck, the top one side of quick change actuating mechanism is provided with quick change actuating cylinder, the output of quick change actuating cylinder is connected with the first inclined plane round pin through the bottom one side of supporting section bar, install the first inclined plane round pin, the first inclined plane is connected with the first inclined plane round pin of reset pin, the side of the first inclined plane is stretched out of the first inclined plane is connected with the first inclined plane round pin, the first end is inserted down.

However, in the process of implementing the technical solution in the embodiment of the application, the applicant finds that at least the following technical problems exist in the above technology:

1. when spacing stud carries out, need assemble drive arrangement on stop device, can't realize automatic assembly, and assembly process is loaded down with trivial details.

2. In the fixing process of the stud, the surface of the hexagonal structure in the middle of the stud is easy to damage, and the subsequent electroplating processing is not facilitated.

Disclosure of Invention

The invention aims to provide a stud bolt machining device which can automatically realize the limitation of full freedom degree in the stud bolt installation process.

The invention adopts the following technical scheme:

the stud bolt machining device comprises a workbench, wherein a supporting frame is arranged on the upper surface of the workbench through a sliding rail, a supporting cylinder with left and right opening ends is arranged at the upper end of the supporting frame, and a driving mechanism and a clamping mechanism are coaxially arranged in the supporting cylinder left and right; the clamping mechanism comprises an end face driving part and a hexagonal clamping part, wherein the end face driving part and the hexagonal clamping part are coaxially arranged; when the stud is inserted into the clamping mechanism, the driving mechanism drives the hexagonal clamping portion to clamp the hexagonal structure in the middle of the stud through extrusion force generated by the stud.

When the limit of the stud is realized, automatic clamping is realized.

Further, the hexagonal clamping part comprises a chuck and a driving block, wherein the chuck is of a hollow cylindrical structure with a cylindrical left part outside and a truncated cone-shaped right part outside; the hexagonal clamping part is divided into three groups of clearance blocks through three groups of clearance grooves which are axially arranged, and the inner wall of the right part of each group of clearance blocks is provided with a limit groove which is matched with the opposite angle of the hexagonal structure; the outer side of each group of gap blocks is correspondingly provided with a group of driving blocks, and the driving blocks are in sliding connection with sliding grooves axially arranged on the inner wall of the supporting cylinder through sliding blocks; when the driving block moves rightwards under the driving of the driving mechanism, the inner side of the driving block presses the round table-shaped outer surface of the right part of the clearance block, and the three groups of clearance blocks are driven to clamp the hexagonal structure of the stud.

The hexagonal structure stress surface of the stud is not damaged as far as possible while the freedom degree of the hexagonal structure of the stud is limited through clamping and fixing of the hexagonal clamping part.

Further, the driving mechanism comprises an extrusion disc coaxially arranged with the chuck, three groups of circular arc push plates are uniformly arranged on the right side surface of the extrusion disc along the circumferential direction, and the right end surface of the push plate is contacted with the left end surface of the driving block; the left end of the chuck is connected with an extrusion disc through a support bearing, a round hole is further formed in the center of the extrusion disc, and a driving rod is inserted into the round hole; the surface of the driving rod is provided with an extrusion disc driving structure, and the driving rod drives the extrusion disc to rotate through the extrusion disc driving structure when moving to the left end.

Further, the extrusion disc driving structure comprises a spiral driving groove formed in the surface of the driving rod, and a spherical key matched with the spiral driving groove is arranged on the side wall of the round hole; the driving rod moves leftwards under the driving of the stud bolt, and drives the extrusion disc to rotate through the spiral driving groove and the spherical key.

Further, the right end of the push plate is arranged in an inclined end face, and the left end of the driving block is correspondingly provided with an inclined end face with the same curvature.

The limit of the freedom degree of the hexagonal structure of the stud bolt is easily realized through the driving rod, and the self-locking is also realized.

Further, the end face driving part comprises a driving cylinder and an end face driving disc arranged at the right end of the driving cylinder, the driving cylinder is sleeved outside the driving block and positioned in the supporting cylinder, the driving cylinder is rotationally connected with the supporting cylinder through a bearing, and the positions of the circumference of the driving cylinder, corresponding to the positions of the sliding blocks, are provided with abdicating holes 36 correspondingly; and a hexagonal hole matched with the hexagonal structure is formed in the center of the end face driving part.

Further, the left end of the driving cylinder is also provided with an energy storage part, the energy storage part comprises an energy storage torsion spring and a rotating disc, the left end and the right end of the energy storage torsion spring are respectively and fixedly connected with the rotating disc and the extruding disc, and the circumferential surface of the rotating disc is radially provided with a torsion connecting rod; the two ends of the torsion connecting rod are respectively fixed with the rotating disc and the inner wall of the driving cylinder.

Further, three groups of through grooves are formed in the end face driving disc in the radial direction, the end face driving disc is divided into three groups of fan face structures which are connected with each other, the left side surface of each fan face structure is provided with a collision part which increases in thickness according to a set slope, and the thickness of the collision part increases along the rotation direction of the energy storage torsion spring driving end face driving disc.

The limit of the full freedom degree of the stud is realized by the combination of the end face driving disc and the hexagonal clamping part.

Further, the left end of the rotating disc is also coaxially sleeved with a spring accommodating cylinder, and the shell of the spring accommodating cylinder is fixed with the supporting cylinder; a reset spring is arranged in the spring accommodating cylinder, and two ends of the reset spring are respectively connected with the bottom surface of the spring accommodating cylinder and the left end surface of the driving rod.

Furthermore, the reset spring is internally provided with a guide rod in a penetrating way, the left end of the guide rod is coaxially fixed with the inner wall of the spring accommodating cylinder, and the right end of the guide rod is inserted into a guide rod jack axially arranged at the left end of the driving rod.

In the invention, a driving mechanism and a clamping mechanism are specially designed, and the driving mechanism is utilized to trigger the driving mechanism to drive the hexagonal clamping part to continuously clamp the hexagonal structure in the middle of the stud by converting the extrusion force provided by the left end face of the stud; the effect of automatic clamping is realized. Meanwhile, the invention can uniformly apply force to two planes of the hexagonal structure in the middle of the stud, can not damage the surface of the hexagonal structure in the middle of the stud, is beneficial to subsequent electroplating processing, and improves the precision of the processed workpiece.

The invention also improves the disassembly efficiency by arranging the reset spring, reduces the disassembly difficulty and shortens the machining time.

Drawings

FIG. 1 is a schematic view of a stud machining apparatus according to the present invention;

FIG. 2 is a schematic view of a clamping mechanism according to the present invention;

FIG. 3 is a schematic view of the structure of the stud bolt of the present invention;

FIG. 4 is a schematic diagram of an end face driving portion according to the present invention;

FIG. 5 is a schematic view of a chuck according to the present invention;

FIG. 6 is a schematic diagram of a driving block according to the present invention;

FIG. 7 is a schematic view of a chute according to the present invention;

FIG. 8 is a schematic view of a driving rod according to the present invention;

FIG. 9 is a schematic view of the structure of an extrusion plate in the present invention;

Fig. 10 is a schematic view of the structure of the end face driving disk in the present invention.

In the figure, 1, a workbench; 2. a support frame; 3. a support cylinder; 4. a clamping mechanism; 5. an end face driving section; 6. a hexagonal clamping part; 7. a stud bolt; 8. a sliding rail; 9. a driving mechanism; 10. a chuck; 11. a hexagonal structure; 12. a guide rod 13 and a limit groove; 14. a driving block; 15. a gap block; 16. an extrusion plate; 17. a chute; 18. a push plate; 19. a support bearing; 20. a driving rod; 21. a driving groove; 22. an end face driving plate; 23. an energy storage unit; 24. a drive cylinder; 25. an energy storage torsion spring; 26. a rotating disc; 27. a torsion connecting rod; 28. hexagonal holes; 29. a slide block; 30. a spring receiving cylinder; 31. a return spring; 32. a clearance groove; 33. a round hole; 34. a bearing; 35. a collision part; 36. and giving way holes.

Detailed Description

The invention is described in detail below with reference to the attached drawings and examples:

As shown in fig. 1 to 10, the stud bolt machining conversion device of the invention comprises a workbench 1, wherein a support frame 2 is arranged on the upper surface of the workbench 1 through a sliding track 8; the upper end of the supporting frame 2 is provided with a supporting cylinder 3 with left and right ends open, and a clamping mechanism 4 is coaxially arranged in the supporting cylinder 3; the clamping mechanism 4 comprises an end face driving part 5 and a hexagonal clamping part 6 which are coaxially arranged; the end face driving part 5 is sleeved outside the hexagonal clamping part 6.

In the working process, as the stud 7 to be processed is easy to generate moment along the axial direction of the stud 7 under the influence of thread cutting equipment (such as an external thread rolling machine), the stud 7 is displaced along the axial direction, and the processing precision is influenced. In order to limit the freedom degree of the stud bolt 7, in the invention, the hexagonal clamping part 6 in the clamping mechanism 4 radially abuts against the outer surface of the hexagonal structure 11 in the middle of the stud bolt 7, so that the stud bolt 7 loses the freedom degree of rotation along the axial direction, and meanwhile, the end face driving part 5 in the clamping mechanism 4 limits the right end face of the hexagonal structure 11, so that the stud bolt 7 loses the freedom degree of movement along the axial direction to the right.

Because the length of the stud bolt 7 to be processed is about 1m-2m, the specification and the weight are large, and a worker cannot conveniently use a tool to adjust the clamping mechanism 4 to clamp the stud bolt 7; in order to improve the machining efficiency, the left end of the clamping mechanism 4 is provided with a driving mechanism 9, and the right end of the driving mechanism 9 is axially inserted into the hexagonal clamping part 6 for clamping; during the working process, the stud bolt 7 is axially inserted into the clamping mechanism 4 from the right side of the clamping mechanism 4, so that the left end face of the stud bolt 7 is abutted against and presses the right end of the driving mechanism 9, and during the continuous insertion process of the left end of the stud bolt 7, the driving mechanism 9 triggers the driving mechanism 9 to drive the hexagonal clamping part 6 to continuously clamp the hexagonal structure 11 in the middle of the stud bolt 7 by converting the extrusion force provided by the left end face of the stud bolt 7; the effect of automatic clamping is realized.

The hexagonal clamping part 6 comprises a clamping head 10 and a driving block 14, wherein the clamping head 10 is of a hollow cylindrical structure, the outer side of the left part of the clamping head 10 is cylindrical, and the outer side of the right part of the clamping head 10 is in a circular truncated cone shape; the chuck 10 is divided into three groups of clearance blocks 15 by three groups of clearance grooves 32 arranged along the axial direction, and the three groups of clearance grooves 32 are uniformly distributed along the circumferential direction of the chuck 10; the three groups of gap blocks 15 are elastic pieces, and the inner wall of the right part of each group of gap blocks 15 is provided with a limit groove 13 which is matched with one diagonal angle in the hexagonal structure 11; the three groups of clearance blocks 15 are symmetrically clamped outside the hexagonal structure 11 of the stud 7, and the three groups of limiting grooves 13 are correspondingly clamped on six planes of the hexagonal structure 11.

In order to be able to drive the right part of the three sets of gap blocks 15 of the collet 10 synchronously towards the centre of the circle, to grip the hexagonal structure 11 in the middle of the stud 7. In the invention, the hexagonal clamping part 6 further comprises three groups of driving blocks 14 sleeved outside the chuck 10, each group of driving blocks 14 is correspondingly arranged outside one group of gap blocks 15, the outer surfaces of the driving blocks 14 are also fixedly connected with sliding blocks 29 in the radial direction, one end of each sliding block 29 is fixed on the outer surface of each driving block 14, and the other end of each sliding block 29 is slidably arranged in a sliding groove 17 axially arranged on the inner wall of the supporting cylinder 3.

During operation, under the action of the sliding groove 17 and the sliding block 29, the driving block 14 axially moves along the sliding groove 17, when the driving block 14 moves rightward along the sliding groove 17, the inner side of the driving block 14 clings to the outer side of the chuck 10, and during the process that the inner side of the driving block 14 extrudes the round table-shaped outer surface of the right part of the chuck 10, the inner diameter of the chuck 10 contracts to clamp the hexagonal structure 11 of the stud 7.

In order to enable the driving block 14 to move rightward along the chute 17, the left end of the clamping mechanism 4 is provided with the driving mechanism 9, the driving mechanism 9 comprises an extrusion disc 16 coaxially arranged with the clamping head 10, three groups of circular arc push plates 18 are uniformly arranged on the right side surface of the extrusion disc 16 along the circumferential direction, and the extrusion disc 16 and the three groups of push plates 18 are integrally arranged; the right end surface of the push plate 18 is in contact with the left end surface of the drive block 14; the left end of the driving block 14 is pressed rightward by the pressing plate 16 in the working process, so that the driving block 14 is pushed to move rightward.

In order to enable the pushing plate 18 in the circumferential direction of the extruding plate 16 to generate pushing force to the driving block 14 in the rotating process of the extruding plate 16, in the invention, the right end of the pushing plate 18 is arranged in an inclined end face, and the left end of the driving block 14 is correspondingly arranged in an inclined end face with the same curvature as the right end of the pushing plate 18; in the process of driving the push plate 18 to rotate by the extrusion plate 16, the driving block 14 can move to the right side along the chute 17 through the inclined end surfaces of the push plate 18 and the driving block 14 which are correspondingly arranged on the premise that the extrusion plate 16 does not need to move axially.

The left end of the chuck 10 is connected with the extrusion disc 16 through a support bearing 19, so that the extrusion disc 16 is rotationally connected with the chuck 10; by providing the support bearing 19, the collet 10 can be rotated without being affected by torsion in the case where the pressing plate 16 is free to rotate by torsion.

To drive the squeeze plate 16 in rotation; in the invention, a round hole 33 is also arranged at the center of the extrusion disc 16, and a driving rod 20 is inserted into the round hole 33; the surface of the driving rod 20 is provided with a squeeze disk driving structure, and the driving rod 20 drives the squeeze disk 16 to rotate through the squeeze disk driving structure when moving leftwards.

In this embodiment, the squeeze disk driving structure includes a spiral driving groove 21 formed along the surface of the driving rod 20, and a spherical key 30 is further provided on the side wall of the circular hole 33; the driving rod 20 moves linearly along the axial direction, and the spiral driving groove 21 formed on the surface of the driving rod 20 guides the spherical key 30 arranged on the side wall of the round hole 33 to move along the circular direction, so that the rotation of the extrusion disc 16 is realized;

In order to enable the stud bolts 7 to drive the squeeze plate 16 to rotate synchronously during the process of inserting the left end into the chuck 10; in the present embodiment, when the left end face of the stud bolt 7 contacts the right end face of the driving rod 20 and moves to the left, the driving rod 20 is caused to receive the thrust force of the stud bolt 7 to the left, and the pressing plate 16 is rotated by the spiral driving groove 21 and the ball key 30 while the driving rod 20 moves to the left; by providing the pitch of the spiral driving groove 21, the pressing plate 16 can be driven to rotate more lightly;

In order to further limit the freedom of movement of the stud bolt 7 in the axial direction, in the present invention, the stud bolt 7 is externally provided with an end face driving portion 5;

The end face driving part 5 comprises a driving cylinder 24 and an end face driving disc 22 arranged at the right end of the driving cylinder 24, the driving cylinder 24 is sleeved outside the driving block 14 and positioned in the supporting cylinder 3, and the driving cylinder 24 is rotationally connected with the supporting cylinder 3 through a bearing 34; a hexagonal hole 28 is formed in the center of the end face driving disc 22; during operation, the hexagonal structure 11 arranged in the middle of the stud bolt 7 is inserted into the hexagonal clamping part 6 through the hexagonal hole 28;

in order to be able to limit the hexagonal structure 11 in the middle of the stud 7 inside the hexagonal clamping portion 6, in the present invention, the stud 7 can be inserted into or removed from the inside of the collet 10 through the hexagonal hole 28 only when the hexagonal structure 11 in the middle of the stud 7 corresponds to the angle of the hexagonal hole 28; when the hexagonal structure 11 in the middle of the stud 7 is completely located at the left end of the end face driving disc 22, the end face driving disc 22 rotates to the angle dislocation between the hexagonal hole 28 and the hexagonal structure 11 in the middle of the stud 7, so that the hexagonal structure 11 in the middle of the stud 7 is limited inside the chuck 10, and the freedom of the stud 7 in axial movement is limited.

In the embodiment, the left end of the driving cylinder 24 is also provided with an energy storage part 23, and the energy storage part 23 is connected with the end face driving disc 22 through the driving cylinder 24; the end face driving disc 22 is arranged in the opening at the right end of the driving cylinder 24 and is fixedly connected with the driving cylinder 24; in order to prevent the slider 29 from interfering with the drive cylinder 24 to prevent the drive cylinder 24 from rotating, the present invention provides a relief hole 36 corresponding to the slider 29 in the circumferential direction of the drive cylinder 24.

In this embodiment, the energy storage portion 23 includes an energy storage torsion spring 25 fixedly disposed at the left end of the extrusion plate 16, the left end of the energy storage torsion spring 25 is fixedly connected with a rotating plate 26, and a torsion connecting rod 27 is radially disposed on the circumferential surface of the rotating plate 26; one end of the torsion connecting rod 27 is fixed with the rotating disc 26 along the radial direction, and the other end is fixed on the inner wall of the driving cylinder 24;

When the stud bolt 7 is inserted, when the hexagon 11 in the middle of the stud bolt 7 is positioned in the hexagon hole 28 in the center of the end face driving disc 22, and the end face on the left side of the stud bolt 7 presses the end face on the right side of the driving rod 20, the pressing disc 16 connected with the driving rod 20 rotates through the spiral driving groove 21 formed on the surface of the driving rod 20 and the spherical key 30 arranged in the pressing disc 16; since the energy-storage torsion spring 25 is coaxially connected with the pressing disc 16, and the rotating disc 26 has a tendency to rotate simultaneously under the action of the pressing disc 16 and the energy-storage torsion spring 25, the rotational freedom of the stud 7 is limited by the collet 10 at this time; the energy storage torsion spring 25 stores energy through rotation, and at the moment, the energy storage torsion spring 25 is in an energy storage state and the end face driving disc 22 cannot rotate; the stud 7 is continuously inserted leftwards, when the hexagon 11 in the middle of the stud 7 continuously moves leftwards in the hexagon hole 28 to the left side of the end face driving disc 22 (namely, the right end face of the hexagon 11 is positioned at the left side of the left end face of the end face driving disc 22), the hexagon 11 releases the limit on the end face driving disc 22, the energy storage torsion spring 25 releases torsion, and the end face driving disc 22 is driven to rotate sequentially through the rotating disc 26, the torsion connecting rod 27 and the driving cylinder 24, so that the end face driving disc 22 rotates to a dislocation state of the hexagon hole 28 and the hexagon 11 in the middle of the stud 7, and the stud 7 is limited to move rightwards along the axial direction. Simultaneously, the extrusion plate 16 rotates, and the driving block 14 moves to the right side along the chute 17 through the inclined end surfaces of the push plate 18 and the driving block 14 which are correspondingly arranged; the driving block 14 presses the round table-shaped outer surface of the right part of the chuck 10 in the rightward moving process, so that the inner diameter of the chuck 10 is contracted to clamp the hexagonal structure 11 of the stud 7.

In order to enable the left side surface of the end surface driving disc 22 to be better attached to the right side end surface of the hexagonal structure 11 in the middle of the stud 7, a limiting effect is achieved; in this embodiment, three groups of through grooves are further formed in the end face driving disc 22 along the radial direction, the end face driving disc 22 is divided into three groups of fan-shaped structures connected with each other, an abutting portion 35 for increasing the thickness according to a set slope is arranged on the left side surface of each fan-shaped structure, and the thickness of the abutting portion 35 increases along the rotation direction (i.e. the rotation direction when the hexagonal hole 28 and the hexagonal structure 11 are formed in a dislocation state) of the end face driving disc 22 driven by the energy storage torsion spring 25; thereby, the thicker end of the abutting part 35 is always abutted against the hexagon 11 in the middle of the stud bolt 7 during the rotation of the end face driving disc 22.

In order to make the stud 7 more labor-saving in the process of disassembly in the working process, in the embodiment, a spring accommodating cylinder 30 is coaxially sleeved at the left end of the rotating disc 26, and the outer shell of the spring accommodating cylinder 30 is fixed with the supporting cylinder 3; a return spring 31 is arranged in the spring accommodating cylinder 30, one end of the return spring 31 is connected with the bottom surface of the spring accommodating cylinder 30, and the other end is fixedly connected with the left end surface of the driving rod 20; the reset spring 31 is internally provided with a guide rod 12 in a penetrating way, the left end of the guide rod 12 is coaxially fixed with the inner wall of the spring accommodating cylinder 30, and the right end of the guide rod 12 is inserted into a guide rod jack axially arranged at the left end of the driving rod 20 and is in sliding connection with the guide rod jack; the guide rod 12 can prevent the driving rod 20 from rotating circumferentially.

After the stud 7 is installed and clamped, the reset spring 31 is in a compressed state, after one end of the stud 7 is machined, the end face driving disc 22 is rotated through the driving cylinder 24 until the hexagonal hole 28 in the center of the end face driving disc 22 corresponds to the angle of the hexagonal structure 11 in the middle of the stud 7, in the process, the reset spring 31 releases elastic potential energy to push the driving rod 20 to rotate, the clamping head 10 made of elastic materials loses pressure from the driving block 14 in the radial direction at the moment, the hexagonal structure 11 in the middle of the stud 7 loses limit, and meanwhile the driving rod 20 pushes the stud 7 to pop out.

When the invention is used, the stud bolt 7 is axially inserted from the right side of the clamping mechanism 4, and when the left end face of the stud bolt 7 contacts the right end face of the driving rod 20 and moves leftwards, the driving rod 20 is subjected to the leftward thrust of the stud bolt 7 and moves leftwards along the axial direction, and the extrusion disc 16 realizes rotation through the spiral driving groove 21 and the spherical key 30 while the driving rod 20 moves leftwards;

at this time, the energy storage torsion spring 25 starts energy storage due to the occurrence of rotation; namely, the extrusion plate 16 rotates, but the rotational freedom of the stud 7 is limited by the elastic hexagonal clamping part 6, and at the moment, the right end of the energy storage torsion spring 25 is fixed and the left end rotates along with the extrusion plate 16;

The energy storage principle is as follows: (since the three groups of gap blocks 15 are in sliding connection with the driving block 14 and can only move axially, the driving block 14 is in sliding connection with the fixed supporting cylinder 3 through the sliding blocks 29 and the sliding grooves 17 and can only move axially, so that the stud bolts 7 cannot rotate due to the fact that the three groups of gap blocks 15 are limited, and the hexagonal structures 11 in the middle of the stud bolts 7 limit the hexagonal holes 28 matched with the end face driving disc 22, because the end face driving disc 22 and the driving cylinder 24 cannot rotate, and the rotating disc 26 fixedly connected with the driving cylinder 24 through the torsion connecting rod 27 cannot rotate, so that the left end of the energy storage torsion spring 25 fixedly connected with the rotating disc 26 cannot rotate).

When the extrusion disc 16 rotates, the rotation of the extrusion disc 16 pushes the driving block 14 to move rightwards through the pushing plate 18 and the inclined end face of the driving block 14, the driving block 14 moves axially along the sliding groove 17 through the sliding block 29, and in the process that the driving block 14 moves rightwards, the inner side of the driving block 14 extrudes the round table-shaped outer surface of the right part of the hexagonal clamping part 6, and the inner diameter of the chuck 10 contracts to clamp and limit the hexagonal structure 11 of the stud 7;

As the stud 7 continues to be inserted to the left, after the hexagonal structure 11 in the middle of the stud 7 continues to move to the left side of the end face driving disc 22 in the hexagonal hole 28, the hexagonal structure 11 releases the restriction on the end face driving disc 22, and the energy storage torsion spring 25 releases torsion force to drive the end face driving disc 22 to rotate sequentially through the rotating disc 26, the torsion connecting rod 27 and the driving cylinder 24, so that the end face driving disc 22 rotates to a state that the hexagonal hole 28 is dislocated with the hexagonal structure 11 in the middle of the stud 7, and the right surface of the hexagonal structure 11 is abutted through the abutting portion 35, so that the stud 7 is restricted to move to the right along the axial direction, and the full freedom degree restriction on the stud 7 is realized.

Subsequently, the stud bolts 7 located outside the holding mechanism 4 are thread-cut using a thread cutting apparatus (e.g., an external thread rolling machine).

The device can be directly arranged on a machine tool of the thread cutting equipment and used as an accessory of the machine tool of the thread cutting equipment.

Claims

1. The utility model provides a stud machining device, includes the workstation, and the workstation upper surface is provided with the support frame through the slip track, its characterized in that: the upper end of the supporting frame is provided with a supporting cylinder with openings at the left end and the right end, and a driving mechanism and a clamping mechanism are coaxially arranged in the supporting cylinder left and right; the clamping mechanism comprises an end face driving part and a hexagonal clamping part, wherein the end face driving part and the hexagonal clamping part are coaxially arranged; when the stud is inserted into the clamping mechanism, the driving mechanism drives the hexagonal clamping portion to clamp the hexagonal structure in the middle of the stud through extrusion force generated by the stud.

2. The stud bolt machining apparatus according to claim 1, wherein: the hexagonal clamping part comprises a chuck and a driving block, wherein the chuck is of a hollow cylindrical structure with a cylindrical left part outside and a round table shape right part outside; the hexagonal clamping part is divided into three groups of clearance blocks through three groups of clearance grooves which are axially arranged, and the inner wall of the right part of each group of clearance blocks is provided with a limit groove which is matched with the opposite angle of the hexagonal structure; the outer side of each group of gap blocks is correspondingly provided with a group of driving blocks, and the driving blocks are in sliding connection with sliding grooves axially arranged on the inner wall of the supporting cylinder through sliding blocks; when the driving block moves rightwards under the driving of the driving mechanism, the inner side of the driving block presses the round table-shaped outer surface of the right part of the clearance block, and the three groups of clearance blocks are driven to clamp the hexagonal structure of the stud.

3. The stud bolt machining apparatus according to claim 2, wherein: the driving mechanism comprises an extrusion disc coaxially arranged with the chuck, three groups of circular arc push plates are uniformly arranged on the right side surface of the extrusion disc along the circumferential direction, and the right end surface of the push plate is contacted with the left end surface of the driving block; the left end of the chuck is connected with an extrusion disc through a support bearing, a round hole is further formed in the center of the extrusion disc, and a driving rod is inserted into the round hole; the surface of the driving rod is provided with an extrusion disc driving structure, and the driving rod drives the extrusion disc to rotate through the extrusion disc driving structure when moving to the left end.

4. A stud bolt machining apparatus according to claim 3, wherein: the extrusion disc driving structure comprises a spiral driving groove formed in the surface of the driving rod, and a spherical key matched with the spiral driving groove is arranged on the side wall of the round hole; the driving rod moves leftwards under the driving of the stud bolt, and drives the extrusion disc to rotate through the spiral driving groove and the spherical key.

5. A stud bolt machining apparatus according to claim 3, wherein: the right end of the push plate is provided with an inclined end face, and the left end of the driving block is correspondingly provided with an inclined end face with the same curvature.

6. The stud bolt machining apparatus according to claim 2, wherein: the end face driving part comprises a driving cylinder and an end face driving disk arranged at the right end of the driving cylinder, the driving cylinder is sleeved outside the driving block and positioned in the supporting cylinder, the driving cylinder is rotationally connected with the supporting cylinder through a bearing, and the positions of the circumference of the driving cylinder, corresponding to the positions of the sliding blocks, are provided with abdicating holes 36 correspondingly; and a hexagonal hole matched with the hexagonal structure is formed in the center of the end face driving part.

7. The stud bolt machining apparatus according to claim 4, wherein: the left end of the driving cylinder is also provided with an energy storage part, the energy storage part comprises an energy storage torsion spring and a rotating disc, the left end and the right end of the energy storage torsion spring are respectively and fixedly connected with the rotating disc and the extrusion disc, and the circumferential surface of the rotating disc is radially provided with a torsion connecting rod; the two ends of the torsion connecting rod are respectively fixed with the rotating disc and the inner wall of the driving cylinder.

8. The stud bolt machining apparatus according to claim 5, wherein: the end face driving disc is provided with three groups of through grooves along the radial direction, the end face driving disc is divided into three groups of fan face structures which are connected with each other, the left side surface of each fan face structure is provided with a collision part which increases in thickness according to a set slope, and the thickness of the collision part increases along the rotation direction of the energy storage torsion spring driving end face driving disc.

9. A stud bolt machining apparatus according to claim 3, wherein: the left end of the rotating disc is also coaxially sleeved with a spring accommodating cylinder, and the shell of the spring accommodating cylinder is fixed with the supporting cylinder; a reset spring is arranged in the spring accommodating cylinder, and two ends of the reset spring are respectively connected with the bottom surface of the spring accommodating cylinder and the left end surface of the driving rod.

10. The stud bolt machining apparatus according to claim 7, wherein: the reset spring is internally provided with a guide rod in a penetrating way, the left end of the guide rod is coaxially fixed with the inner wall of the spring accommodating cylinder, and the right end of the guide rod is inserted into a guide rod jack axially arranged at the left end of the driving rod.