Auxiliary fixing clamp for tapping threads of U-shaped and E-shaped bolts

Abstract

The invention provides an auxiliary fixing clamp for tapping of U-shaped and E-shaped bolts, which comprises a base arranged on a workbench of horizontal machining equipment, a fixing plate and an auxiliary fixing frame, the fixing plate is transversely arranged on the base, two positioning holes and two auxiliary holes are parallelly formed in the fixing plate, studs of the U-shaped and E-shaped bolts penetrate through the positioning holes, and the auxiliary fixing frame is arranged on the auxiliary fixing frame. The auxiliary fixing frames are symmetrically arranged on the two sides of the positioning hole and are the same as the positioning hole in height, the auxiliary fixing frames are arranged on the outer sides, right facing the positioning hole and the auxiliary holes, of the fixing plate, and clamping channels are formed between the auxiliary fixing frames and the fixing plate. According to the auxiliary fixing clamp, the auxiliary hole plays a stopping role, the U-shaped bolt or the E-shaped bolt can be limited to rotate along with the tool, the U-shaped bolt or the E-shaped bolt can be rapidly clamped through the auxiliary fixing frame, the auxiliary fixing clamp is high in clamping speed, time and labor are saved, and the tapping efficiency of the U-shaped bolt and the E-shaped bolt is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tapping for U-shaped and E-shaped bolts, and particularly relates to an auxiliary fixing jig for tapping U-shaped and E-shaped bolts. Background Art

[0002] In a mining scraper conveyor, U-shaped bolts and E-shaped bolts are the main connecting fittings for connecting the scraper and the chain. Due to the large quantity used and high strength requirements, they are generally manufactured by forging process. After forging, the studs need to be clamped on a horizontal machining equipment for threading processing.

[0003] Currently, the commonly used clamping method in the prior art is a jaw-type tooling. For example, the authorized announcement number is CN203045365U, which discloses a positioning tooling fixture for mining E-shaped bolts. By setting a connecting seat and a fixing seat on the base, installing a positioning block between the connecting seat and the fixing seat, hinging a hook-shaped pressing plate on the connecting seat, installing a U-shaped positioning plate on the hook-shaped pressing plate, setting a rotating rod and a nut on the fixing seat, and locking the other end of the hinged hook-shaped pressing plate on the fixing seat through the rotating rod and the nut, so that the U-shaped positioning plate cooperates with the positioning block to clamp the workpiece.

[0004] This kind of positioning tooling fixture has a simple and practical structure and is widely applied, suitable for clamping and fixing most machining parts. However, when clamping and fixing U-shaped and E-shaped bolts, since it can only clamp one of the studs of the U-shaped and E-shaped bolts, during the threading process of the stud by the die cutter, a torsional force will be formed on the stud. If the clamping force of the stud is not tight enough, the U-shaped and E-shaped bolts will rotate following the die cutter. Therefore, each time of clamping requires tightening the nut or the rotating rod to increase its clamping force and lock the stud, and each time of clamping requires disassembling the nut or the rotating rod and then re-clamping, which has the technical problems of time-consuming, laborious, slow clamping speed and inconvenient operation, resulting in low processing efficiency. Summary of the Invention

[0005] In view of this, it is necessary to provide an auxiliary fixing jig for tapping U-shaped and E-shaped bolts to solve the technical problems of slow clamping speed, time-consuming and laborious in the prior art, resulting in low processing efficiency.

[0006] The technical solution adopted by the present invention to solve its technical problems is: An auxiliary fixing fixture for tapping U-shaped and E-shaped bolts comprises a base, a fixing plate and an auxiliary fixing frame arranged on a workbench of a horizontal processing equipment. The fixing plate is arranged horizontally on the base. Positioning holes and auxiliary holes for the studs of the U-shaped and E-shaped bolts to pass through are opened in parallel on the fixing plate. There are two auxiliary holes, which are symmetrically arranged on both sides of the positioning hole and have the same height as the positioning hole. The auxiliary fixing frame is arranged on the outer side of the fixing plate facing the positioning hole and the auxiliary hole. A channel for clamping the U-shaped and E-shaped bolts is formed between the auxiliary fixing frame and the fixing plate, and the auxiliary fixing frame can telescopically move toward the fixing frame to squeeze the U-shaped or E-shaped bolts onto the fixing plate.

[0007] The cam is an angular channel formed between a pair of camshafts and a pair of camshafts, each of which is adapted to move along a line extending along the length of the camshaft so as to allow the cam to move along the line of sight between the two members.

[0008] Preferably, a detachable and replaceable bushing matching the stud to be tapped is coaxially arranged in the positioning hole.

[0009] Preferably, the auxiliary holes are all strip holes opened laterally.

[0010] Preferably, a handle is provided at the end of the pull rod away from the pushing plate.

[0011] Preferably, two support seats are spaced apart at the upper end of the base, the support seats are aligned with each other, and through guide holes are respectively and parallelly opened on the support seats, the fixed plate is arranged on the side of the guide hole opened in the support seat, and a sliding shaft matching the guide hole is arranged on the inner side of the fixed plate facing the guide hole, the sliding shaft is parallel to the positioning hole and the auxiliary hole, the sliding shaft passes through the guide hole and can slide freely along the guide hole, a spring is sleeved on each of the sliding shafts, the spring clamp is arranged between the fixed plate and the support seat, and the two ends of the spring are respectively fixedly connected to the fixed plate and the support seat.

[0012] Preferably, a stop block is provided at the end of each sliding shaft extending out of the guide hole.

[0013] Preferably, a third secondary hole is further provided outside one of the secondary holes on the fixing plate. The third secondary hole is parallel to and at the same height as the positioning hole. A third support seat is further provided on the side of the base corresponding to the third secondary hole. The third support seat is also provided with a through guiding hole in parallel. The guiding hole on the third support seat is parallel to the guiding hole on the support seat. A third sliding shaft is further provided on the inner side of the fixing plate facing the third support seat. The third sliding shaft penetrates into the third support seat and can slide freely along the third support seat.

[0014] As can be seen from the above technical solutions, the U-shaped and E-shaped bolt tapping auxiliary fixing fixture provided by the present application includes a base, a fixing plate and an auxiliary fixing frame arranged on the workbench of a horizontal machining device. The fixing plate is horizontally arranged on the base. Positioning holes and secondary holes for the studs of U-shaped and E-shaped bolts to pass through are provided in parallel on the fixing plate. There are two secondary holes, which are symmetrically arranged on both sides of the positioning hole and at the same height as the positioning hole. The auxiliary fixing frame is arranged outside the fixing plate opposite to the positioning hole and the secondary holes. A channel for clamping U-shaped and E-shaped bolts is formed between the auxiliary fixing frame and the fixing plate, and can perform telescopic movement towards the fixing frame direction. When tapping U-shaped bolts or E-shaped bolts, after inserting the corresponding studs of U-shaped bolts or E-shaped bolts into the positioning holes and secondary holes, the positioning holes can be used to quickly position the studs to be tapped, and the secondary holes play a role of stopping, which can limit the rotation of U-shaped bolts or E-shaped bolts following the threading tool on the main shaft of the horizontal machining device. And the U-shaped bolts or E-shaped bolts can be quickly clamped through the auxiliary fixing frame. This auxiliary fixing fixture is convenient to operate, has a fast clamping speed, saves time and effort, and improves the tapping processing efficiency of U-shaped bolts and E-shaped bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic diagram of the invention.

[0016] Figure 2 It is a three-dimensional structure schematic diagram of another angle of the invention.

[0017] Figure 3 It is an exploded structure schematic diagram of the invention.

[0018] Figure 4 It is a schematic diagram of one clamping state of the U-shaped bolt of the invention.

[0019] Figure 5 It is a schematic diagram of one clamping state of the E-shaped bolt of the invention.

[0020] Figure 6 It is a schematic diagram of the structure of another preferred embodiment of the invention.

[0021] Figure 7Schematic diagram of the clamping state of the E-shaped bolt in another preferred embodiment of the invention.

[0022] Figure 8 Schematic diagram of the structure of the U-shaped bolt.

[0023] Figure 9 Schematic diagram of the structure of the E-shaped bolt.

[0024] In the figure: base 10, fixed plate 20, auxiliary fixing frame 30, positioning hole 21, secondary hole 22, third secondary hole 23, sliding shaft 24, stop block 25, spring 26, bottom plate 301, push plate 302, push rod 303, push spring 304, handle 305, boss 306, bushing 40, support seat 11, guide hole 12, third support seat 13. Detailed implementation manners

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Please refer to Figure 1 and Figure 2 , the embodiments of the present invention provide an auxiliary fixing jig applicable to tapping U-shaped and E-shaped bolts, including a base 10, a fixed plate 20 and an auxiliary fixing frame 30 arranged on the workbench of a horizontal machining device. The fixed plate 20 is horizontally arranged on the base 10. On the fixed plate 20, a positioning hole 21 and a secondary hole 22 for the stud of the U-shaped and E-shaped bolts to pass through are arranged in parallel. The positioning hole 21 is directly opposite to the threading tool installed on the spindle of the horizontal machining device. The diameter of the positioning hole 21 matches the diameter of the stud to be threaded. The two secondary holes 22 are symmetrically arranged on both sides of the positioning hole 21, are parallel to the positioning hole 21 and have the same height. The auxiliary fixing frame 30 is arranged outside the fixed plate 20 opposite to the positioning hole 21 and the secondary hole 22. A channel for clamping the U-shaped and E-shaped bolts is formed between the auxiliary fixing frame 30 and the fixed plate 20, and can move telescopically towards the direction of the fixing frame to squeeze the U-shaped or E-shaped bolt against the fixed plate 20.

[0027] Specifically, the auxiliary fixing bracket 30 includes a bottom plate 301, a pushing plate 302, a push rod 303, a push spring 304 and a handle 305. The bottom plate 301 is arranged in parallel at the lower end of the fixing plate 20 and extends outward along the opening direction of the positioning hole 21 towards the outside of the fixing plate 20. The end extending towards the outside of the fixing plate 20 is bent upwards to form a convex platform 306. Through holes are respectively formed at both ends of the side wall of the convex platform 306 facing the fixing plate 20. There are two push rods 303, which respectively pass through the two through holes and can freely slide towards the fixing plate 20 along the through holes. The pushing plate 302 is horizontally arranged between the convex platform 306 and the fixing plate 20. Both ends of the pushing plate 302 are fixedly arranged at the ends of the two push rods 303 facing the fixing plate 20. The pushing plate 302 is parallel to the fixing plate 20, and a channel for clamping the U-shaped screw and the E-shaped bolt is formed between the pushing plate 302 and the fixing plate 20. There are two push springs 304, which are respectively sleeved on the two push rods 303. The push spring 304 is a compression spring. One end of the push spring 304 abuts against the inner side of the convex platform 306, and the other end abuts against the pushing plate 302 to push the pushing plate 302 towards the fixing plate 20. The two push rods 303 are distributed at both ends of the pushing plate 302, which can play a balancing role to make the forces at both ends of the pushing plate 302 evenly distributed. Both ends of the handle 305 are respectively fixed to the other ends of the two push rods 303 away from the pushing plate 302. By pulling the handle 305, the two push rods 303 can be simultaneously driven to slide along the through holes, so that the pushing plate 302 moves away from the fixing plate 20, opening the channel. The push spring 304 contracts and deforms under the extrusion force of the pushing plate 302. After the stud of the U-shaped or E-shaped bolt is correspondingly inserted into the positioning hole 21 and the secondary hole 22, the handle 305 is released. The pushing plate 302 is pushed towards the fixing plate 20 by the rebounding force of the push spring 304. The U-shaped screw or the E-shaped bolt is squeezed against the fixing plate 20 by the pushing plate 302 for auxiliary fixing. And when tapping threads, the push spring 304 can buffer the impact force when the threading tool feeds, enabling the threading tool to perform flexible tapping, which has the effect of protecting the threading tool and reducing the damage of the threading tool during feeding.

[0028] Please refer to Figure 1 , Figure 4 and Figure 8, when threading the U-bolt, pull the handle 305 outward toward the outside of the boss 306, so that the push plate 302 moves toward the boss 306. During the movement of the push plate 302 toward the boss 306, the push spring 304 will be squeezed by the push plate 302 and shrink and deform itself. After pulling the push plate 302 to one side of the boss 306, insert one stud of the U-bolt into the positioning hole 21, and after inserting the other stud of the U-bolt into the secondary hole 22 on either side of the positioning hole 21, release the handle 305. Under the action of the deformation force of the push spring 304, the push plate 302 presses against the back of the U-bolt and pushes the U-bolt toward the fixed plate 20. The push plate 302 and the fixed plate 20 clamp the U-bolt. After the threading process of the stud inserted into the positioning hole 21 is completed, pull the handle 305 again to move the push plate 302 away from the fixed plate 20. After swapping the positions of the two studs of the U-bolt, clamp the U-bolt again.

[0029] Please refer to Figure 2 、 Figure 5 and Figure 9 , when threading the stud at the middle position of the E-bolt, the same clamping operation method is used, and the threading process is carried out on each stud in turn. For example, when threading the stud at the middle position of the E-bolt, insert the stud at the middle position of the E-bolt into the positioning hole 21, and the studs at the two end positions of the E-bolt can be respectively inserted into the two secondary holes 22 correspondingly. When threading the stud at the end position of the E-bolt, the stud at the end position of the E-bolt can be inserted into the positioning hole 21, and the stud at the middle position of the E-bolt is inserted into any one of the secondary holes 22 correspondingly, while the stud at the other end position of the E-bolt does not need to be fixed and can be placed outside the fixed plate 20.

[0030] When threading the U-bolt or the E-bolt, at least one stud of the U-bolt or the E-bolt is always inserted into one of the secondary holes 22. The secondary hole 22 plays a role of stopping and can restrict the U-bolt or the E-bolt from rotating with the threading tool of the horizontal processing equipment.

[0031] Please refer to Figure 1 and Figure 3 , further, in order to improve the application range of the auxiliary fixing fixture, a detachable and replaceable bushing 40 is coaxially arranged in the positioning hole 21. The bushing 40 is connected to the positioning hole 21 by a thread. The bushing 40 is matched with the diameter of the stud to be threaded. During the threading process, the bushing 40 with a suitable specification can be replaced according to the diameter of the stud of the U-shaped or E-shaped bolt to be processed.

[0032] Please refer to Figure 1 or Figure 2, Further, the auxiliary holes 22 are all strip-shaped holes opened horizontally, which can facilitate the insertion of the studs of U-shaped or E-shaped bolts, and can be adapted to the studs with different stud spacings within a certain range for tapping processing.

[0033] Please refer to Figures 1 to 3 , Further, in a preferred embodiment, two support seats 11 are arranged at intervals on the upper end of the base 10. The support seats 11 are aligned with each other. Through guide holes 12 are respectively and parallelly opened on the support seats 11. The guide holes 12 are parallel to the spindle of the horizontal machining equipment. The fixing plate 20 is arranged on one side of the support seat 11 where the guide hole 12 is opened. On the inner side of the fixing plate 20 facing the guide hole 12, two sliding shafts 24 matching the guide hole 12 are arranged. The sliding shafts 24 are parallel to the positioning holes 21 and the auxiliary holes 22, and are symmetrically arranged on both sides of the positioning hole 21. The sliding shafts 24 pass through the guide holes 12 and can slide freely along the guide holes 12. A stop block 25 is arranged at the end of each sliding shaft 24 extending out of the guide hole 12, which can limit the sliding shaft 24 from disengaging from the guide hole 12. A spring 26 is sleeved on each sliding shaft 24. The spring 26 is clamped between the fixing plate 20 and the support seat 11. The two ends of the spring 26 are respectively fixedly connected to the fixing plate 20 and the support seat 11. During the tapping process, when the die cutter installed on the spindle of the horizontal machining equipment rotates forward, the stud being tapped is subjected to the shearing force and spiral force of the die cutter, driving the fixing plate 20 to move towards the die cutter direction, causing the spring 26 to be squeezed and deformed. The deformation of the spring 26 generates a reverse force on the stud, making the movement of the stud more stable during the tapping process. When the tapping is completed and the die cutter rotates in the reverse direction to retract the tool, the deformation force of the spring 26 can form an outward traction on the stud, facilitating the retraction of the tool.

[0034] Please refer to Figure 6 and Figure 7, Further, in another preferred embodiment, a third secondary hole 23 is provided outside one of the secondary holes 22 on the fixing plate 20. The third secondary hole 23 is parallel to and at the same height as the positioning hole 21. A third support seat 13 is also provided on the side of the base 10 corresponding to the third secondary hole 23. The third support seat 13 is also provided with a through guiding hole 12 in parallel. The guiding hole 12 on the third support seat 13 is parallel to the guiding hole 12 on the support seat 11. A third sliding shaft 24 is also provided on the inner side of the fixing plate facing the third support seat 13. The third sliding shaft 24 penetrates into the third support seat 13 and can slide freely along the third support seat 13. When threading the stud at one end position of the E-shaped bolt, the middle position of the E-shaped bolt and the studs at the other end position can be correspondingly inserted into the secondary hole 22 and the third secondary hole 23. With the assistance of the third secondary hole 23 and the third support seat 13 matching the third sliding shaft 24, the supporting force for the E-shaped bolt and the stability of the fixing plate 20 can be improved.

[0035] Install a bearing sliding seat in the guiding hole 12. The sliding shaft 24 and the third sliding shaft 24 are arranged in the bearing sliding seat and slide therein. The bearing sliding seat can be replaced after wear.

[0036] This auxiliary fixing fixture is easy to operate, has a fast clamping speed, saves time and effort, is suitable for clamping and fixing U-shaped bolts and E-shaped bolts of different specifications, and improves the threading processing efficiency of U-shaped bolts and E-shaped bolts.

[0037] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. An auxiliary fixing fixture for tapping U-shaped and E-shaped bolts, characterized in that: The invention comprises a base, a fixing plate and an auxiliary fixing frame arranged on a workbench of a horizontal processing equipment. The fixing plate is arranged horizontally on the base. Positioning holes and auxiliary holes for studs of U-shaped and E-shaped bolts to pass through are opened in parallel on the fixing plate. There are two auxiliary holes which are symmetrically arranged on both sides of the positioning hole and have the same height as the positioning hole. The auxiliary fixing frame is arranged on the outer side of the fixing plate facing the positioning hole and the auxiliary hole. A channel for clamping the U-shaped and E-shaped bolts is formed between the auxiliary fixing frame and the fixing plate, and the auxiliary fixing frame can telescopically move toward the fixing frame to squeeze the U-shaped or E-shaped bolts onto the fixing plate.

2. The auxiliary fixing fixture for tapping U-shaped and E-shaped bolts according to claim 1, characterized in that: The two ends of the push rod are respectively fixed on the two ends of the push rod towards the end of the fixing plate, the push rod and the fixing plate are parallel to each other, and a channel for clamping U-shaped and E-shaped bolts is formed between the two push rods and the fixing plate. The two push springs are correspondingly sleeved on the two push rods, one end of the push spring is against the inner side of the boss, and the other end of the push spring is against the push plate to push the push plate towards the direction of the fixing plate. The handle is arranged on the other end of the push plate away from the two push rods, and the push rod is pulled away from the fixing plate by the handle.

3. The auxiliary fixing fixture for tapping U-shaped and E-shaped bolts according to claim 1, characterized in that: A detachable and replaceable bushing matching the stud to be threaded is coaxially arranged in the positioning hole.

4. The auxiliary fixing fixture for tapping U-shaped and E-shaped bolts according to claim 1, characterized in that: The auxiliary holes are all strip holes opened transversely.

5. The auxiliary fixing fixture for tapping U-shaped and E-shaped bolts as claimed in claim 2, characterized in that: The end of the pull rod away from the pushing plate is provided with a handle.

6. The auxiliary fixing fixture for tapping U-shaped and E-shaped bolts according to any one of claims 1 to 5, characterized in that: Two support seats are arranged at intervals on the upper end of the base, the support seats are aligned with each other, and through guide holes are opened in parallel on the support seats, the fixed plate is arranged on one side of the guide hole of the support seat, and a sliding shaft matching the guide hole is arranged on the inner side of the fixed plate facing the guide hole, the sliding shaft is parallel to the positioning hole and the auxiliary hole, the sliding shaft passes through the guide hole and can slide freely along the guide hole, a spring is sleeved on each of the sliding shafts, the spring clamp is arranged between the fixed plate and the support seat, and the two ends of the spring are fixedly connected to the fixed plate and the support seat respectively.

7. The auxiliary fixing fixture for tapping U-shaped and E-shaped bolts as claimed in claim 6, characterized in that: A stop block is arranged at the end of each sliding shaft extending out of the guide hole.

8. The auxiliary fixing fixture for tapping U-shaped and E-shaped bolts as claimed in claim 7, characterized in that: A third secondary hole is also provided on the outer side of one of the secondary holes on the fixed plate, and the third secondary hole is parallel to the positioning hole and has the same height as the positioning hole. A third support seat is also provided on the side of the base corresponding to the third secondary hole, and the third support seat is also provided with a through guide hole in parallel. The guide hole on the third support seat is parallel to the guide hole on the support seat. A third sliding shaft is also provided on the inner side of the fixed plate facing the third support seat, and the third sliding shaft penetrates into the third support seat and can slide freely along the third support seat.

Images