阅读说明：本技术 螺栓加工系统 (Bolt processing system ) 是由 单银荣 平华 补声河 于 2020-05-27 设计创作，主要内容包括：本发明涉及一种螺栓加工系统,应用在螺栓加工的技术领域,其包括冷镦机、淬火炉和回火炉,还包括提升机、储料箱、托架和基架,提升机的输送带上设有若干料板,提升机的输入端位于冷镦机的出料口处,输出端位于储料箱的进料口上方,储料箱底部设有用于支撑的支撑架和用于输送螺栓的料管,料管远离储料箱的一端设有用于控制料管启闭的闸门组件,托架位于料管的出料端下方且托架上滑动连接有滑板,滑板上设有用于存放螺栓的托盘,托架上设有顶推气缸,顶推气缸的活塞杆与滑板连接。本发明具有减少操作者工作量的效果。(The invention relates to a bolt processing system which is applied to the technical field of bolt processing and comprises a cold header, a quenching furnace, a tempering furnace, a lifting machine, a storage box, a bracket and a base frame, wherein a plurality of material plates are arranged on a conveying belt of the lifting machine, the input end of the lifting machine is positioned at the discharge port of the cold header, the output end of the lifting machine is positioned above the feed inlet of the storage box, the bottom of the storage box is provided with a support frame for supporting and a material pipe for conveying bolts, one end, away from the storage box, of the material pipe is provided with a gate assembly for controlling the material pipe to be opened and closed, the bracket is positioned below the discharge end of the material pipe, the bracket is connected with a sliding plate in a sliding manner, the sliding plate is provided with. The invention has the effect of reducing the workload of the operator.)

1. The utility model provides a bolt system of processing, includes cold heading machine (1), quenching furnace (11) and tempering furnace (12), its characterized in that: also comprises a lifter (13), a storage box (14), a bracket (15) and a base frame (16), a plurality of material plates (131) are arranged on a conveying belt of the hoister (13), the input end of the hoister (13) is positioned at the discharge port of the cold header (1), the output end of the hoister is positioned above the feed port of the material storage box (14), the bottom of the material storage box (14) is provided with a support frame (141) for supporting and a material pipe (142) for conveying bolts, one end of the material pipe (142) far away from the material storage box (14) is provided with a gate component (3) for controlling the material pipe (142) to open and close, the bracket (15) is positioned below the discharge end of the material pipe (142), the bracket (15) is connected with a sliding plate (151) in a sliding way, a tray (17) for storing bolts is arranged on the sliding plate (151), a pushing cylinder (152) is arranged on the bracket (15), and a piston rod of the pushing cylinder (152) is connected with the sliding plate (151);

the base frame (16) is provided with a sliding seat (18) and a driving part (4) for driving the sliding seat (18) to move along the length direction of the base frame (16), the sliding seat (18) is provided with a driving hydraulic cylinder (181), a piston rod of the driving hydraulic cylinder (181) is connected with a base plate (19), the bottom surface of the base plate (19) is provided with a lifting hook (191), and the tray (17) is provided with a lifting ring (171) matched with the lifting hook (191);

the mouth of a stove up of quenching furnace (11) and tempering furnace (12), quenching furnace (11) and tempering furnace (12) lateral wall all articulate has angle seat (2) and top push hydraulic cylinder (21), the hinge point of angle seat (2) is higher than the pin joint of top push hydraulic cylinder (21), the one end of angle seat (2) is connected with furnace gate (22) that are used for sealing the mouth of a stove, and the other end is articulated with the piston rod in the top push hydraulic cylinder (21).

2. The bolt machining system according to claim 1, wherein: the gate assembly (3) comprises a gate plate (31) hinged to the discharge end of the material pipe (142) and a support rod (32) arranged on the material pipe (142), a servo cylinder (33) is hinged to the support rod (32), and a piston rod of the servo cylinder (33) is hinged to the gate plate (31).

3. The bolt machining system according to claim 1, wherein: the driving piece (4) comprises two winches (41) arranged at two ends of the base frame (16), two pulling ropes (42) are connected to rollers of the winches (41), and the two pulling ropes (42) are connected with the sliding base (18).

4. The bolt machining system according to claim 1, wherein: the bottom surface of the tray (17) is provided with a supporting leg (172), the height of the supporting leg (172) is larger than that of the hanging ring (171), and the tray (17) is provided with a plurality of through holes (173).

5. The bolt machining system according to claim 4, wherein: still include vibration platform (5), be equipped with spacing frame (51) on vibration platform (5), stabilizer blade (172) support on vibration platform (5) and are located spacing frame (51).

6. The bolt machining system according to claim 1, wherein: quenching furnace (11) are equipped with heat recovery and utilize device (6) outward, heat recovery and utilize device (6) including connecting ventilation pipe (61) and the end cover (62) of threaded connection in ventilation pipe (61) on quenching furnace (11) outer wall, the one end that quenching furnace (11) were kept away from in ventilation pipe (61) articulates there is conveyer pipe (63), conveyer pipe (63) all are equipped with ring flange (64), two in the one end of contradicting each other with ventilation pipe (61) ring flange (64) are fixed through mounting (7), install exhaust fan (631) in conveyer pipe (63), the one end that ventilation pipe (61) were kept away from in conveyer pipe (63) is connected with hose (632).

7. The bolt machining system according to claim 6, wherein: the fixing piece (7) comprises a limiting seat (71) and a stud (72) in threaded connection with the limiting seat (71), the stud (72) penetrates into the limiting seat (71), and a backing plate (73) is arranged at one penetrating end.

8. The bolt machining system according to claim 7, wherein: a sealing gasket (65) is arranged between the two flange plates (64).

9. The bolt machining system according to claim 1, wherein: the sliding seat (18) and the base plate (19) are respectively provided with a guide cylinder (182) and a guide column (1821), and one end of the guide column (1821) is inserted into the guide cylinder (182).

10. The bolt machining system according to claim 1, wherein: the cooling jacket (8) is connected to the outside of the cylinder body of the pushing hydraulic cylinder (21) through screws, an annular housing (81) is arranged on the outer wall of the cooling jacket (8), and a water inlet nozzle (82) and a water outlet nozzle (83) are arranged on the housing (81).

Technical Field

The invention relates to the technical field of bolt machining, in particular to a bolt machining system.

Background

The bolt is widely applied, generally comprises a head part and a screw rod, can be matched with a nut for use, and is used for fastening and connecting two parts with through holes. The processing technology of the current bolt is also quite mature, the processing technology generally comprises the forming processing and the heat treatment of a multi-station cold header, the multi-station cold header can process raw materials into the formed bolt, the heat treatment can enhance the yield strength of the bolt, and the service life of the bolt is prolonged.

Most of the existing bolt processes are that bolts processed on a cold header are collected firstly, then are centrally piled into a quenching furnace for quenching treatment, and are taken out after quenching is finished and are put into a tempering furnace for tempering treatment, and the bolts are transferred between the processes mainly manually, so that the workload of operators is large.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a bolt machining system which has the effect of reducing the workload of operators.

The above object of the present invention is achieved by the following technical solutions: a bolt processing system comprises a cold header, a quenching furnace and a tempering furnace, and further comprises a lifter, a storage box, a bracket and a base frame, wherein a plurality of material plates are arranged on a conveying belt of the lifter, the input end of the lifter is positioned at the discharge outlet of the cold header, the output end of the lifter is positioned above the feed inlet of the storage box, a support frame for supporting and a material pipe for conveying bolts are arranged at the bottom of the storage box, a gate assembly for controlling the material pipe to be opened and closed is arranged at one end of the material pipe, which is far away from the storage box, a sliding plate is arranged below the discharge end of the material pipe, the bracket is connected with the bracket in a sliding manner, a tray for storing bolts is arranged on the sliding plate, a pushing cylinder is;

the base frame is provided with a sliding seat and a driving piece for driving the sliding seat to move along the length direction of the base frame, the sliding seat is provided with a driving hydraulic cylinder, a piston rod of the driving hydraulic cylinder is connected with a base plate, the bottom surface of the base plate is provided with a lifting hook, and the tray is provided with a lifting ring matched with the lifting hook;

the quenching furnace comprises a quenching furnace body, a tempering furnace body, a top pushing hydraulic cylinder, a corner seat, a furnace door, a piston rod, a top pushing hydraulic cylinder, a furnace door, a piston rod, a connecting rod and a connecting rod, wherein the furnace door is arranged in.

By adopting the technical scheme, during processing, bolts from a discharge port of the cold header fall on a conveyor belt of a lifter, are transmitted by the lifter to be stored in a storage box, a gate assembly is opened, the bolts fall onto a tray from a material pipe, a driving piece controls a sliding seat to move, so that a lifting hook is buckled with a lifting ring, then a hydraulic cylinder is driven to drive the lifting hook to ascend to lift the whole tray, when the tray moves above a quenching furnace, the hydraulic cylinder is driven to drive the lifting hook to descend, the tray is placed into the quenching furnace, the lifting hook is separated from the lifting ring and moves out of the quenching furnace, and a pushing hydraulic cylinder is started to push a furnace door to overturn to seal a furnace mouth of the quenching; after quenching is finished, a piston rod of the pushing hydraulic cylinder retracts to drive the furnace door to be opened, the lifting hook penetrates into the quenching furnace again to hook the lifting ring, and the tray is lifted and placed into the tempering furnace, so that the workload required by workers is reduced, operators are separated from heated bolts, and the safety of production and processing is improved; the storage box plays a role in storing the bolts during quenching, and continuous processing and discharging of the cold header are guaranteed.

The present invention in a preferred example may be further configured to: the gate assembly comprises a gate plate hinged to the discharge end of the material pipe and a supporting rod arranged on the material pipe, a servo cylinder is hinged to the supporting rod, and a piston rod of the servo cylinder is hinged to the gate plate.

Through adopting above-mentioned technical scheme, when servo cylinder's piston rod moves telescopically, the flashboard rotates to being close to or keeping away from the material pipe mouth of pipe direction under the drive of piston rod, has realized closing or opening simple and convenient to the material pipe.

The present invention in a preferred example may be further configured to: the driving piece comprises two winches arranged at two ends of the base frame, the two winches are connected to rollers of the winches, and the two hauling ropes are connected with the sliding seat.

Through adopting above-mentioned technical scheme, two hoists start simultaneously, and a hoist rolling haulage rope, another hoist release haulage rope to the pulling slide removes, and the bearing capacity is big.

The present invention in a preferred example may be further configured to: the bottom surface of the tray is provided with support legs, the height of each support leg is larger than that of each hanging ring, and the tray is provided with a plurality of through holes.

By adopting the technical scheme, during quenching or tempering, an operator can lift a plurality of brackets into the furnace to stack the brackets, so that the heat treatment efficiency is improved.

The present invention in a preferred example may be further configured to: still include vibration platform, the last spacing frame that is equipped with of vibration platform, the stabilizer blade supports on vibration platform and is located spacing frame.

Through adopting above-mentioned technical scheme, when the bolt whereabouts to the tray on, vibration platform makes the bracket vibration for the bolt dispersion in the tray is come, guarantees the area of contact of every bolt, does benefit to and improves thermal treatment effect.

The present invention in a preferred example may be further configured to: the heat recycling device is arranged outside the quenching furnace and comprises a ventilation pipe connected to the outer wall of the quenching furnace and a sealing end cover in threaded connection with the ventilation pipe, a conveying pipe is hinged to one end, far away from the quenching furnace, of the ventilation pipe, flange plates are arranged at the end, mutually abutted, of the conveying pipe and the ventilation pipe, the two flange plates are fixed through fixing pieces, an exhaust fan is installed in the conveying pipe, and one end, far away from the ventilation pipe, of the conveying pipe is connected with a hose.

By adopting the technical scheme, the sealing end cover blocks the ventilation pipe during quenching, so that heat loss is reduced; after the heat treatment is finished, an operator unscrews the sealing end cover, rotates the conveying pipe to be opposite to the ventilating pipe and is fixed by the fixing piece, the exhaust fan is opened, hot air in the furnace is pumped out and is blown out from the hose, the operator can use hot air to blow dry the bolt after the cleaning process, the process time is shortened, and the resource utilization rate is improved.

The present invention in a preferred example may be further configured to: the fixing piece comprises a limiting seat and a stud which is in threaded connection with the limiting seat, the stud penetrates into the limiting seat, and a base plate is arranged at one penetrating end of the stud.

By adopting the technical scheme, an operator can insert the limiting seat into the flange plate, and then the stud is screwed to tightly abut the base plate against one flange plate, so that the ventilation pipe and the conveying pipe can be fixed, and the ventilation pipe is simple and convenient.

The present invention in a preferred example may be further configured to: and a sealing gasket is arranged between the two flange plates.

By adopting the technical scheme, the sealing gasket increases the sealing property between the ventilating pipe and the conveying pipe, and reduces the possibility of air leakage.

The present invention in a preferred example may be further configured to: and the sliding seat and the substrate are respectively provided with a guide cylinder and a guide post, and one end of the guide post is inserted in the guide cylinder.

Through adopting above-mentioned technical scheme, when drive hydraulic cylinder drive base plate removed, the guide post removed along the guide cylinder under the drive of base plate, had played the guide effect, did benefit to the stability that improves the base plate and removed.

The present invention in a preferred example may be further configured to: the outer cylinder body of the pushing hydraulic cylinder is connected with a cooling jacket through a screw, the outer wall of the cooling jacket is provided with an annular housing, and the housing is provided with a water inlet nozzle and a water outlet nozzle.

By adopting the technical scheme, when the temperature in the pushing hydraulic cylinder is too high, an operator connects the water inlet nozzle with a water source, so that cold water enters the housing and flows out of the water outlet nozzle to form a water circulation, the temperature of hydraulic oil in the pushing hydraulic cylinder is reduced, and the protection effect on the pushing hydraulic cylinder is achieved.

In summary, the invention includes at least one of the following beneficial technical effects:

1. the automatic lifting, storage, discharging and lifting of quenching and tempering of the bolts are realized, the workload required by manpower is reduced, and the processing efficiency is improved;

2. the hot air drying of the bolts in the subsequent cleaning procedure is realized through the heat recycling device, so that the resource utilization rate is increased; the water circulation of the pushing hydraulic cylinder enables the working temperature of the pushing hydraulic cylinder to be maintained within a certain range, and the protection effect on the pushing hydraulic cylinder is achieved.

Drawings

Fig. 1 is a schematic structural diagram of the present embodiment.

Fig. 2 is a schematic structural diagram of a flitch embodying the embodiment.

Fig. 3 is a schematic structural diagram of a storage tank and a material pipe according to the embodiment.

Fig. 4 is an enlarged view of a in fig. 3.

Fig. 5 is a schematic structural diagram for embodying the tray in this embodiment.

Fig. 6 is a schematic structural diagram for embodying the corner seat and the oven door in the present embodiment.

Fig. 7 is an enlarged view at B in fig. 6.

Fig. 8 is a schematic structural view of the cooling jacket and the housing according to the present embodiment.

In the figure, 1, a cold header; 11. a quenching furnace; 12. tempering furnace; 13. a hoist; 131. a material plate; 14. a material storage box; 141. a support frame; 142. a material pipe; 15. a bracket; 151. a slide plate; 152. a pushing cylinder; 16. a base frame; 17. a tray; 171. a hoisting ring; 172. a support leg; 173. a through hole; 18. a slide base; 181. driving the hydraulic cylinder; 182. a guide cylinder; 1821. a guide post; 19. a substrate; 191. a hook; 2. a corner seat; 21. a pushing hydraulic cylinder; 22. a furnace door; 3. a gate assembly; 31. a shutter plate; 32. a strut; 33. a servo cylinder; 4. a drive member; 41. a winch; 42. a hauling rope; 5. a vibration platform; 51. a limiting frame; 6. a heat recovery and utilization device; 61. a vent pipe; 62. sealing the end cap; 63. a delivery pipe; 631. an exhaust fan; 632. a hose; 64. a flange plate; 65. a gasket; 7. a fixing member; 71. a limiting seat; 72. a stud; 73. a base plate; 8. a cooling jacket; 81. a housing; 82. a water inlet nozzle; 83. a water outlet nozzle.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the bolt processing system disclosed by the present invention comprises a cold header 1, a quenching furnace 11, a tempering furnace 12, a hoist 13, a storage box 14, a bracket 15 and a base frame 16, wherein an input end of the hoist 13 is located at a discharge port of the cold forging machine, bolts falling on a belt of the hoist 13 are conveyed upwards, an output end of the hoist 13 is located above a feed port of the storage box 14, and a plurality of material plates 131 are arranged on the belt of the hoist 13 and are equidistantly distributed along the outer contour of the belt, so as to reduce the falling of the bolts in the conveying process.

As shown in fig. 3 and 4, the material storage tank 14 is erected off the ground through a support frame 141, the bottom of the material storage tank 14 is hopper-shaped and is provided with a material pipe 142 for conveying a bolt, and the material pipe 142 extends downwards along an incline and is provided with a gate assembly 3 at one end away from the material storage tank 14 for controlling the opening and closing of the material pipe 142; the gate assembly 3 comprises a gate plate 31 hinged to one end of the material pipe 142, which is far away from the material storage tank 14, a hinged point of the gate plate 31 is located at the circumferential top end of the end part of the material pipe 142, a supporting rod 32 is arranged on the material pipe 142, a servo cylinder 33 is hinged to the supporting rod 32, a piston rod of the servo cylinder 33 is hinged to the gate plate 31, when the gate plate 31 is located at an initial position, an orifice of the material pipe 142 is closed, and when the piston rod of the servo cylinder 33 retracts, the gate plate 31 is pulled to rotate.

As shown in fig. 4 and 5, the bracket 15 is supported on the ground and located below the discharge end of the material pipe 142, the bracket 15 is provided with a pushing cylinder 152, a piston rod of the pushing cylinder 152 is connected with a sliding plate 151, the sliding plate 151 is slidably connected to the bracket 15, the sliding plate 151 is provided with a vibration platform 5, the vibration platform 5 is provided with a limiting frame 51 and a tray 17 for storing bolts, the tray 17 is located in the limiting frame 51, the bottom surface of the tray 17 is provided with an annular supporting leg 172, the outer diameter of the supporting leg 172 is the same as the outer diameter of the tray 17 and is supported on the vibration platform 5, the tray 17 is provided with lifting hooks 191 coaxially distributed, the height of the lifting hook 191 is smaller than the height of the supporting leg 172.

As shown in fig. 6, the quenching furnace 11 and the tempering furnace 12 are sequentially arranged in the moving direction of the sliding plate 151, and the furnace mouths of the quenching furnace 11 and the tempering furnace 12 are both arranged upward, the side walls of the quenching furnace 11 and the tempering furnace 12 are both hinged with an angle base 2 and a pushing hydraulic cylinder 21, the angle base 2 is L-shaped, the hinge point of the angle base 2 is located at the furnace mouth and higher than the hinge point of the pushing hydraulic cylinder 21, one end of the angle base 2 is connected with a furnace door 22, the other end is hinged with a piston rod of the pushing hydraulic cylinder 21, and when the pushing hydraulic cylinder 21 is at the initial position.

As shown in fig. 8, a cooling jacket 8 is sleeved outside a cylinder body of the pushing hydraulic cylinder 21, the cooling jacket 8 is fixed with the pushing hydraulic cylinder 21 by a screw, an annular housing 81 is arranged on an outer wall of the cooling jacket 8, so that an annular cavity is formed between the cooling jacket 8 and the housing 81, and a water inlet nozzle 82 and a water outlet nozzle 83 are arranged on the housing 81.

As shown in fig. 4, the base frame 16 is erected outside the quenching furnace 11 and the tempering furnace 12, the base frame 16 is slidably connected with a sliding base 18 moving along the length direction thereof, the moving direction of the sliding base 18 is parallel to the moving direction of the sliding plate 151, the bottom surface of the sliding base 18 is provided with a driving hydraulic cylinder 181 and two guide cylinders 182 symmetrically distributed about the driving hydraulic cylinder 181, guide posts 1821 are respectively inserted into the two guide cylinders 182, the piston rod of the driving hydraulic cylinder 181 is vertically downward and is connected with a base plate 19 together with the two guide posts 1821, and the bottom surface of the base plate 19 is provided with a hook 191 engaged with the hanging ring 171.

As shown in fig. 3, a driving member 4 for driving the sliding base 18 to move is arranged on the base frame 16, the driving member 4 includes winches 41 installed at two ends of the base frame 16, pulling ropes 42 are wound on rollers of the two winches 41, and the two pulling ropes 42 are connected with the sliding base 18; in operation, the two winches 41 are simultaneously started, one winch 41 winds the front hauling rope 42, and the other winch 41 releases the hauling rope 42, so that the sliding base 18 is pulled to move.

The working process is as follows: bolts machined and formed by the cold header 1 fall on a belt of the hoister 13 and are conveyed upwards, and then fall into the storage box 14 for temporary storage; the servo cylinder 33 is started, the gate plate 31 is driven to rotate to open the material pipe 142, the bolts in the material storage box 14 slide into the tray 17 through the material pipe 142, then the servo cylinder 33 pushes the gate plate 31 to rotate, the pipe orifice of the material pipe 142 is closed, the vibration platform 5 is started, the bolts in the tray 17 are spread under the vibration of the vibration platform 5, the vibration platform 5 is closed, the pushing cylinder 152 is started and pushes the sliding seat 18 to advance, and the tray 17 is far away from the material pipe 142; the hoisting machine 41 is started, the sliding base 18 is driven to drive the lifting hook 191 to move above the lifting ring 171, the hoisting machine 41 is suspended, the hydraulic cylinder 181 is driven to start, the lifting hook 191 is driven to move downwards and is opposite to the lifting ring 171, the hoisting machine 41 is started, after the lifting hook 191 moves forwards and is buckled with the lifting ring 171, the hydraulic cylinder 181 is driven to pull the lifting hook 191 to move upwards, the tray 17 is lifted to be separated from the vibration platform 5, and meanwhile, the hoisting machine 41 rotates reversely; when the tray 17 moves to the position right above the quenching furnace 11, the driving hydraulic cylinder 181 drives the lifting hook 191 to descend, the tray 17 is lifted into the quenching furnace 11, the lifting hook 191 horizontally moves and is separated from the lifting ring 171, then the lifting hook ascends and moves out of the quenching furnace 11, in the moving process of the first tray 17, an operator places the second tray 17 on the vibration platform 5 to continue feeding, after the feeding is finished, the lifting hook 191 moves back to lift the second tray into the quenching furnace 11 and to stack the first tray 17, the operation is repeated in a circulating mode, the pushing hydraulic cylinder 21 corresponding to the quenching furnace 11 is started, and the furnace door 22 is pushed to rotate to close the furnace mouth.

After quenching is finished, the pushing hydraulic cylinder 21 pulls the furnace door 22 of the quenching furnace 11 to be opened, the lifting hook 191 descends to stretch into the quenching furnace 11 to lift the trays 17 out one by one and then lift the trays into the tempering furnace 12 for tempering heat treatment, the pushing hydraulic cylinder 21 corresponding to the tempering furnace 12 is started to push the furnace door 22 to seal the intersection, after tempering is finished, the furnace door 22 is opened, the lifting hook 191 lifts the trays 17 out of the tempering furnace 12 for discharging, automatic lifting, storage, discharging and lifting of quenching and tempering of bolts are achieved, workload required by manpower is reduced, the amount of single heat treatment of one furnace is increased, and processing efficiency is improved.

When the working temperature of the pushing hydraulic cylinder 21 is too high, an operator connects a water source to the water cooler, and the water cooler cools water and then is connected with the water inlet nozzle 82 through a pipeline, so that cold water flows into the housing 81 and flows out of the water outlet nozzle 83 to form a water circulation, and the pushing hydraulic cylinder 21 is cooled, so that the working temperature of the pushing hydraulic cylinder 21 is maintained within a stable range.

As shown in fig. 7, a heat recycling device 6 is arranged outside the quenching furnace 11, the heat recycling device 6 comprises a vent pipe 61 connected to the outer wall of the quenching furnace 11, the vent pipe 61 is communicated with the inside of the quenching furnace 11, the vent pipe 61 is connected with a sealing end cover 62 through threads in the vent pipe 61, one end, away from the quenching furnace 11, of the vent pipe 61 is hinged to a delivery pipe 63, the vent pipe 61 and the delivery pipe 63 have the same inner diameter, and the two flanges are respectively provided with a flange plate 64 at the opposite end, the side wall of one flange plate 64 is provided with a high-temperature-resistant sealing gasket 65, meanwhile, the two flange plates 64 are fixed through a fixing part 7.

As shown in fig. 7, the fixing member 7 includes a limiting seat 71, the limiting seat 71 is U-shaped and is inserted outside the two flanges 64, a stud 72 is connected to one end of the limiting seat 71 through a thread, an end of the stud 72 penetrates into the limiting seat 71, and a backing plate 73 is disposed at the penetrating end, so that an operator can screw the stud 72 to drive the backing plate 73 to abut against the flanges 64, thereby clamping the two flanges 64 by the backing plate 73 and the limiting seat 71, which is simple and convenient.

As shown in fig. 7, in the quenching furnace 11, during the heat treatment, an operator unscrews the stud 72, separates the pad plate 73 from the flange 64, removes the stopper seat 71, rotates the conveying pipe 63 to separate from the ventilating pipe 61, and after the heat treatment of the quenching furnace 11 is finished, since the temperature in the quenching furnace 11 is still kept in a high range, the bolt needs to be cleaned after the heat treatment is finished, and impurities such as an oxide layer on the surface are removed. An operator rotates the sealing end cover 62 to detach the sealing end cover, then rotates the conveying pipe 63 to be in butt joint with the ventilating pipe 61 and is fixed by the fixing piece 7, the exhaust fan 631 is started, hot air in the quenching furnace 11 is pumped out and conveyed to the cleaned bolt through the hose 632 to blow the bolt, and the bolt processing speed is accelerated.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.