CN116497309A - Passenger car torsion beam heat treatment device and heat treatment process - Google Patents

Abstract

The invention discloses a torsion beam heat treatment device and a heat treatment process of a passenger car, wherein the heat treatment device comprises a carburizing furnace, a cleaning device for cleaning the inner wall is arranged in the carburizing furnace, a post-treatment device for collecting carbon powder is arranged at the rear end of the carburizing furnace, the cleaning device comprises a scraping and sweeping frame and a power device, a sliding groove is arranged on the carburizing furnace, a hanging and sweeping frame is arranged in the sliding groove in a guiding and sliding manner, and a roller and a fan blade are rotatably arranged in the hanging and sweeping frame. The invention provides a torsion beam heat treatment device and a heat treatment process for a passenger car, which can automatically clean carbon deposition in a carburizing furnace before carburization, save energy, simultaneously avoid the problem of heat treatment quality caused by carbon deposition, automatically collect the carbon deposition, screen out metal oxides mixed in the interior, obtain high-purity carbon powder, be used for manufacturing other substances or selling, and increase other economic incomes.

Description

Passenger car torsion beam heat treatment device and heat treatment process

Technical Field

The invention relates to the technical field of heat treatment, in particular to a heat treatment device and a heat treatment process for torsion beams of passenger cars.

Background

The carburization treatment is a chemical heat treatment process mainly comprising the steps of increasing the carbon content of the surface layer of a steel part and forming a certain carbon concentration gradient, heating the steel part in a carburization medium and preserving heat to enable carbon atoms to permeate into the surface layer, wherein the carburization treatment is generally carried out in a carburizing furnace, the carburization medium can attach the carbon atoms on the inner wall of the carburizing furnace at high temperature, and meanwhile, oxides on the surface of a heat treatment material can fall into the carburizing furnace.

The existing treatment mode is that the carbon burning treatment is carried out by heating before the heat treatment, so that only the attached carbon can be burnt out, but the oxide cannot be treated, and meanwhile, the duration of the carbon burning process is long, and at least half an hour is needed, so that the energy waste is caused.

Disclosure of Invention

The invention provides a torsion beam heat treatment device and a heat treatment process for a passenger car, aiming at the defects in the prior art. In order to solve the technical problems, the invention is solved by the following technical scheme: the utility model provides a passenger car torsion beam heat treatment device, including the carburizing furnace, be provided with the cleaning device who is used for cleaning the inner wall in the carburizing furnace, and be provided with the aftertreatment device who is used for collecting the carbon dust at the rear end, cleaning device is including scraping and sweeping frame and power device, be provided with the sliding tray on the carburizing furnace, hang and sweep frame direction slip setting in the sliding tray, hang and sweep the frame internal rotation and be provided with gyro wheel and fan blade, the gyro wheel presses and touches on the sliding tray, and be connected through the belt with the fan blade, the fan blade rotates and can inhale the carbon dust of scraping to hanging and sweep the inside carbon chamber that gathers of frame, be provided with the spool on the power device, be connected with the one end of stay cord on the spool, the other end is connected on scraping and sweeping the frame, and the cover is equipped with first elastic component on the stay cord, its both ends are respectively the top touch on scraping the rear end wall of sweeping frame and sliding tray, the spool rotates and can twine the stay cord on the spool, thereby the pulling is scraped and is swept the frame and remove, hang and sweep frame can collect the carbon dust on the carbon chamber after scraping on the inner wall, the carbon chamber, the back treatment device includes teeter room and filtrate chamber, be provided with on the baffle chamber, and the filter chamber, be connected with the end, the hydrochloric acid pump is connected to the hydrochloric acid pump in the inside through the slip chamber, the slip pipe is connected to the inside through the roll, the hydrochloric acid pump is moved to the inside, and is connected to the hydrochloric acid pump through the slip pipe, and the pump is moved to the inside and the pump, and the inside.

The automatic cleaning device has the beneficial effects that when the carburizing furnace is started, the inner wall of the carburizing furnace can be automatically scraped, the incineration process is omitted, the energy waste is reduced, meanwhile, the cleaning time is shortened, the effective service time of the carburizing furnace is prolonged, meanwhile, the automatic cleaning can be realized when the carburizing furnace is started each time, and the problem of heat treatment quality caused by stirring change of the carbon content in the furnace due to forgetting to clean is avoided.

In the above scheme, preferably, the appearance of the hanging and sweeping frame is the same as the size of the inner cavity of the carburizing furnace, the hanging and sweeping frame is provided with a hanging and sweeping plate, the hanging and sweeping plate can be pressed and contacted on the inner wall of the carburizing furnace, thereby carbon powder is scraped off, a plurality of air suction holes are formed in the circumferential direction of the hanging and sweeping frame, the air suction holes are communicated with a carbon collecting cavity, the carbon collecting cavity is communicated with a rotating chamber of a fan blade, a filter screen is arranged at the joint of the carbon collecting cavity and the rotating chamber of the fan blade, and therefore the carbon powder can be collected in the carbon collecting cavity.

In the above scheme, preferably, the stirring chamber is further provided with a stirring rod, the stirring rod is provided with a pneumatic motor, the lower end of the stirring chamber is provided with a discharging pipe, the discharging pipe is provided with a switching device, the power device is further connected with an air pump, the air pump can press air into the air storage barrel after rotating, and the pneumatic motor is connected with the air storage barrel.

In the above scheme, preferably, the switch device comprises a sliding tube, the sliding tube vertically penetrates through the discharging tube, a sliding block is arranged in the sliding tube, a through hole is formed in the sliding block, the end A of the sliding tube is communicated with the air storage barrel, the end B of the sliding block is provided with a magnetic pole identical to the sliding tube, when compressed air does not exist in the air storage barrel, the sliding block is propped against the end A under the action of the magnetic pole, at the moment, the through hole is aligned with the discharging tube, the air pressure in the air storage barrel rises, the sliding block is propped against the end B under the action of the air pressure, and the through hole is misplaced with the discharging tube.

In the above scheme, preferably, the post-treatment device further comprises a filtering device and a collecting chamber, the filtering device comprises a first roller, a second roller and a filter screen, the second roller is arranged on the filtrate chamber, the first roller is arranged on the collecting chamber and is a cavity, the inner wall of the first roller is provided with the outer end of the spiral spring, the inner end of the spiral spring is arranged on the collecting chamber, one end of the filter screen is arranged on the second roller, the other end of the filter screen is wound on the first roller, and the lower end of the discharging pipe is aligned with the filter screen.

In the above scheme, preferably, the second roller is provided with a first bevel gear in a sliding manner on the rotating shaft, a second bevel gear is arranged on the winding shaft, a ring groove is formed in the first bevel gear, a poking rod is arranged at the end of the sliding block B, the front end of the poking rod is located in the ring groove, and the sliding block moves left and right to control the first bevel gear to be meshed with or separated from the second bevel gear.

The heat treatment process of the torsion beam of the passenger car comprises the following steps:

s1, pretreatment: and vertically placing the pipe fitting, putting the pipe fitting into equipment for pretreatment, treating and eliminating stress generated by forming, reducing heat treatment deformation, preparing for the next working procedure, and setting the temperature to be 500-600 ℃ and the treatment time to be 60-150 min.

S2, carburizing: and (3) transferring the product treated in the step (S1) into equipment with a specific protective atmosphere for heating carburization treatment, eliminating decarburization generated in the forming process of the product, wherein the temperature is set to 850-950 ℃ and the treatment time is 30-60 min.

S3, quenching treatment: and (3) pre-cooling the product in the S2, putting the product into an oil tank for quenching, and adjusting the oil temperature and the stirring speed in the quenching process.

S4, cleaning: and (3) carrying out surface cleaning and decontamination on the product after the treatment of the step (S3), and drying.

S5, tempering: and (3) putting the product dried in the step S4 into equipment for tempering treatment, wherein the tempering temperature is 200-350 ℃, and the tempering time is 120-180 min.

The beneficial effects of the invention are as follows: the invention provides a torsion beam heat treatment device and a heat treatment process for a passenger car, which can automatically clean carbon deposition in a carburizing furnace before carburization, save energy, simultaneously avoid the problem of heat treatment quality caused by carbon deposition, automatically collect the carbon deposition, screen out metal oxides mixed in the interior, obtain high-purity carbon powder, be used for manufacturing other substances or selling, and increase other economic incomes.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

FIG. 3 is a schematic view of a portion of the present invention.

Fig. 4 is a plan sectional view of the present invention.

Fig. 5 is an enlarged partial cross-sectional view of the sweep frame of the present invention.

Fig. 6 is an enlarged view of a portion of the filter device of the present invention.

FIG. 7 is a schematic view of a portion of a carburizing furnace according to the present invention.

Detailed Description

The invention is described in further detail below with reference to the attached drawings and detailed description: referring to fig. 1-7, the torsion beam heat treatment process of the passenger car is used for pretreatment, the product after being loaded with the furnace is placed into a pretreatment furnace, the temperature is raised to 520 ℃ at the speed of 10 ℃/min, nitrogen is introduced at the speed of 1 m/h, and the temperature is kept for 120min.

Carburizing, namely transferring the product subjected to the pretreatment process into a carburizing furnace, heating to 890 ℃ at the speed of 10 ℃/min, introducing N2 at the speed of 4 m/H, dripping CH3OH at the speed of 3.5L/H, introducing C3H8 gas at the speed of 0.6 m/H to ensure that c% is about 0.9, preserving heat for 30min, regulating the flow to ensure that c% is about 0.7, and preserving heat for 20min.

Quenching, namely pre-cooling the product subjected to the carburizing treatment to 850 ℃, homogenizing the temperature for 30min, and keeping the vertical state of the product to be immersed in quenching liquid for quenching for 30min.

And (3) cleaning, namely soaking and cleaning a product subjected to the quenching treatment step in warm water, and drying.

And (3) placing the product subjected to the step of cleaning into tempering equipment, heating to 230 ℃ at the speed of 10 ℃/min, and preserving heat for 180min.

The utility model provides a passenger car torsion beam heat treatment device, includes carburizing furnace 1, cleaning device 2 and aftertreatment device 3, the carburizing furnace 1 is the setting of opening the door back and forth, and has seted up sliding tray 11 on the inner chamber bottom surface, transversely elastic sliding is provided with shutoff board 12 on the sliding tray 11, and both ends all are provided with the inclined plane around the shutoff board 12, and the front and back two doors are closed during normal carburization, and shutoff board 12 seals up sliding tray 11, cleaning device 2 includes scrapes and sweeps frame 21 and power device 23, scrapes and sweeps frame 21 direction slip and set up on sliding tray 11, and power device 23 includes double-end motor, decelerator and spool 221, and double-end motor one end is connected with decelerator's input, and decelerator's output passes through bevel gear and spool 221 to be connected, is provided with reel and second helical gear 2211 on the reel, is provided with one section of stay cord 23 on the reel, and the other end of stay cord 23 is provided with on scraping frame 21 along sliding tray 11, and the cover is equipped with first elastic component on the stay cord 23, and both ends are propped up respectively on scraping and sweeping frame 21 and the back of sliding tray 11.

The scraping frame 21 is propped against the inclined surface of the plugging plate 12 when the scraping frame 21 starts to move, so that the plugging plate 12 automatically retracts into the carburizing furnace 1, and when the scraping frame 21 moves to the two ends of the sliding groove 11, the contact with the plugging plate 12 disappears, so that the sliding groove 11 in the carburizing furnace 1 is covered again under the action of the elastic piece at the rear end of the plugging plate 12.

The scraping frame 21 is internally provided with an air draft cavity and a carbon collecting cavity 213, the air draft cavity and the carbon collecting cavity are communicated, a filter screen is arranged at the joint, the air draft cavity is rotationally provided with a fan blade 212, the fan blade 212 is connected with a roller 211 rotationally arranged at the bottom end of the scraping frame 21 through a belt, the roller 211 is propped against the bottom surface of the sliding groove 11, therefore, when the scraping frame 21 slides on the sliding groove 11, the roller 211 and the bottom surface of the sliding groove 11 are rubbed to rotate, the fan blade 212 is driven to rotate, air suction is carried out from the carbon collecting cavity 213, a hanging and sweeping plate 215 is arranged on the periphery of the scraping frame 21, an air suction hole 216 is arranged below the hanging and sweeping plate 215, and the air suction hole 216 is communicated with the carbon collecting cavity 213 through an inner pipeline.

When the double-headed motor rotates to drive the winding shaft 221 to rotate, the winding shaft 221 winds the pull rope 23 on the winding disc, so that the pull rope 23 is drawn in, the other end of the pull rope 23 is pulled to move along the rear end of the sliding groove 11, the hanging and sweeping plate 215 is propped against the inner wall of the carburizing furnace 1 in the moving process, carbon powder or oxide of heat treatment materials accumulated on the inner wall is scraped, and at the moment, the fan blade 212 rotates, so that the scraped matters are all concentrated into the carbon collecting cavity 213 through the air suction hole 216.

The collected carbon powder contains metal oxide, if the carbon powder is directly ignited, harmful gases such as carbon monoxide are easily generated, and the carbon powder with high purity can be used for manufacturing carbon rods and the like after being collected, but the metal oxide mixed in the carbon powder needs to be screened out.

The post-treatment device 3 comprises a stirring chamber 31, a filtering device 32, a collecting chamber 33 and a filtrate chamber 34, wherein the stirring chamber 31 is positioned above the filtrate chamber 34 and below the rear end of the sliding groove 11, a feeding pipe 311 is arranged on the upper end surface of the stirring chamber 31, a discharging pipe 312 is arranged at the lower end of the sliding plate, a sliding plate 214 is elastically arranged at the lower end of the carbon collecting cavity 213, hydrochloric acid solution is arranged in the filtrate chamber 34, a conveying pipe 341 is connected between the bottom of the filtrate chamber 34 and the stirring chamber 31, a rotary pump 342 is arranged on the conveying pipe 341, the rotary pump 342 is connected with a double-headed motor on the power device 23, the rotary pump 342 is driven to rotate when the double-headed motor rotates, so that the hydrochloric acid solution in the filtrate chamber 34 is lifted upwards into the stirring chamber 31, the sliding plate 214 is propped against the feeding pipe 311 after the scraping frame 21 moves from the front end to the rear end of the carburizing furnace 1, the sliding plate 214 is kept motionless, the scraping frame 21 is continuously moved backwards at the moment, the bottom of the carbon collecting cavity 213 is opened, the opening area of the carbon collecting cavity 213 is aligned with the feeding pipe 311, and therefore all materials in the carbon collecting cavity 213 and the stirring chamber 31 are all stirred.

The double-headed motor of the power device 22 is also connected with an air pump 222, the air pump 222 is connected with an air storage barrel 223, air can be pressed into the air storage barrel 223 when the double-headed motor rotates, a stirring rod 313 is further arranged on the stirring chamber 31, a pneumatic motor 314 is arranged on the stirring rod 313, the air storage barrel 223 is communicated with the pneumatic motor 314 through a pipeline, a discharging pipe 312 is provided with a switching device 315, the switching device 315 comprises a sliding pipe 3151, the sliding pipe 3151 vertically penetrates through the discharging pipe 312, a sliding block 3152 is arranged in the sliding pipe 3151, a through hole 3153 is formed in the sliding block 3152, the end 3151A of the sliding pipe is communicated with the air storage barrel 223, a magnetic pole is arranged at the end B, and the end B of the sliding block 3152 is provided with the same magnetic pole as the end 3151B of the sliding pipe.

In the initial state, no compressed air is in the air storage barrel 223, so that the end A of the sliding block 3152 is propped against the end A of the sliding tube 3151 under the action of the magnetic pole, and at the moment, the through hole 3153 on the sliding block 3152 is aligned with the discharging tube 312, and the substances in the stirring chamber 31 can flow downwards from the through hole 3153.

When the double-headed motor is started, the air pump 222 is driven to rotate, air is pressed into the air storage barrel 223, so that compressed air is arranged at the end A of the sliding pipe 3151, the sliding block 3152 is pushed to move towards the end B, the end B of the sliding block 3152 is finally propped against the end B of the sliding pipe 3151 along with the air pressure increase in the air storage barrel 223, at the moment, the through hole on the sliding block 3152 is misplaced with the discharging pipe 312, the discharging pipe 312 is blocked, the rotary pump 342 is also rotated in the process of blocking the discharging pipe 312, the hydrochloric acid solution in the filtrate chamber 34 is lifted upwards into the stirring chamber 31, after the discharging pipe 312 is blocked, the stirring chamber 31 starts to gather the hydrochloric acid solution, and in the process of adding the hydrochloric acid solution, the scraping and sweeping frame 21 moves towards the stirring chamber 31, carbon powder and oxide on the inner wall of the carburizing furnace 1 are collected in the carbon collecting chamber 213, the sliding plate 214 is fully opened, the pressing contact switch is used for controlling the double-headed motor to stop working, the brake state is kept, and the bottom of the carbon collecting chamber 213 is opened, and the material in the stirring chamber 213 falls into the stirring chamber 31.

The pressure contact switch controls the double-headed motor to stop and simultaneously controls the air storage barrel 223 to supply air to the air motor 314, so that the air motor 314 drives the stirring rod 312 to rotate, metal oxides in the materials react with hydrochloric acid to obtain high-purity carbon powder, the air motor 314 stops working after the compressed air in the air storage barrel 223 is used up, meanwhile, the Huadong block 3152 automatically opens the discharging pipe 312 towards the A end Huadong under the action of the magnetic pole, and the mixed solution flows downwards from the through hole 3153.

The filtering device 32 comprises a first roller 321, a second roller 322 and a filter screen 323, the second roller 322 is rotatably arranged on the filtrate chamber 34, the first roller 321 is rotatably arranged on a fixed shaft on the collecting chamber 33, the first roller 321 is arranged in a cavity, the inner wall of the first roller is provided with the outer end of a scroll spring 324, the inner end of the scroll spring 324 is arranged on the fixed shaft of the collecting chamber 33, one end of the filter screen 323 is arranged on the second roller 322, the other end of the filter screen 323 is wound on the first roller 321, the lower end of the discharging pipe 312 is aligned to the filter screen 323, the filtrate chamber 34 is arranged below the filter screen 323, so that the discharging pipe 312 is opened, the solution passes through the filter screen 323, the carbon powder is completely remained on the filter screen 323, the reacted solution reenters the filtrate chamber 34, and metal oxides in the solution in the filtrate chamber 34 are less, and the solution in the filtrate chamber 34 can be reused.

The rotating shaft of the second roller 322 is slidably provided with a first bevel gear 3221, the first bevel gear 3221 is provided with a ring groove, the end of the sliding block 3152B is provided with a toggle rod 3154, the front end of the toggle rod 3154 is located in the ring groove, and the sliding block 3152 moves left and right to control the first bevel gear 3221 to be engaged with or disengaged from the second bevel gear 2211 on the spool 221.

When the end B of the sliding block 3152 is abutted against the end B of the sliding tube 3151, the first bevel gear 3221 is meshed with the second bevel gear 2211, so that in the process of moving the scraping frame 21 backwards, the winding shaft 221 drives the second roller 322 to rotate, the filter screen 323 which is rolled on the first roller 321 in the initial state is rolled on the second roller 322, meanwhile, the spiral spring 324 is wound tightly, the second roller 322 is still when the double-headed motor brakes, when the sliding block 3152 moves towards the end B of the sliding tube 3151, namely, when the discharging tube 312 is opened, the sliding block 3152 drives the first bevel gear 3221 to move out of meshing with the second bevel gear 2211 through the toggle rod 3154, after the meshing out, the spiral spring 324 starts to reset, so as to drive the first roller 321 to rotate, the filter screen 323 is rolled on the first roller 321 again, in the process of rolling, the filter screen 323 falls on the upper plane of the filter screen 323 to the collecting chamber 33 automatically, thus high-purity filter screen is obtained, the second roller 322 is arranged on the filter chamber 34 in a damping rotation mode, when the sliding block 3152 moves towards the end of the sliding tube 3151, namely, when the discharging tube 312 is opened, the first roller 321 rotates slowly, and the filter screen can completely rotates in the chamber 33, and after the whole stirring process of the stirring drum is completely rotates, and the filter screen is completely in the chamber 31, and can rotate slowly.

The working principle or the using method is as follows:

in the initial state, the scraping frame 21 is located at the front end of the sliding groove 11 under the action of the first elastic piece, namely, the front end face of the carburizing furnace 1, when the carburizing furnace is started, the front door and the rear door of the carburizing furnace are automatically opened, at the moment, the double-headed motor is electrified to start rotating, so that when the winding shaft 221 is driven to rotate, the winding shaft 221 winds the pull rope 23 on the winding disc, the pull rope 23 is furled, the other end of the pull rope 23 is pulled to move along the rear end of the sliding groove 11, the hanging and sweeping plate 215 is propped against the inner wall of the carburizing furnace 1 in the moving process, carbon powder or oxide of a heat treatment material accumulated on the inner wall is scraped, at the moment, the fan blade 212 rotates, and the scraped object is completely concentrated into the carbon collecting cavity 213 through the air suction hole 216.

The collected carbon powder contains metal oxide, if the carbon powder is directly ignited, harmful gases such as carbon monoxide are easily generated, and the carbon powder with high purity can be used for manufacturing carbon rods and the like after being collected, but the metal oxide mixed in the carbon powder needs to be screened out.

In the initial state, no compressed air is in the air storage barrel 223, so that the end A of the sliding block 3152 is propped against the end A of the sliding tube 3151 under the action of the magnetic pole, and at the moment, the through hole 3153 on the sliding block 3152 is aligned with the discharging tube 312, and the substances in the stirring chamber 31 can flow downwards from the through hole 3153.

When the double-headed motor is started, the air pump 222 is driven to rotate, air is pressed into the air storage barrel 223, so that compressed air is arranged at the end A of the sliding pipe 3151, the sliding block 3152 is pushed to move towards the end B, the end B of the sliding block 3152 is finally propped against the end B of the sliding pipe 3151 along with the air pressure increase in the air storage barrel 223, at the moment, the through hole on the sliding block 3152 is misplaced with the discharging pipe 312, the discharging pipe 312 is blocked, the rotary pump 342 is also rotated in the process of blocking the discharging pipe 312, the hydrochloric acid solution in the filtrate chamber 34 is lifted upwards into the stirring chamber 31, after the discharging pipe 312 is blocked, the stirring chamber 31 starts to gather the hydrochloric acid solution, and in the process of adding the hydrochloric acid solution, the scraping and sweeping frame 21 moves towards the stirring chamber 31, carbon powder and oxide on the inner wall of the carburizing furnace 1 are collected in the carbon collecting chamber 213, the sliding plate 214 is fully opened, the pressing contact switch is used for controlling the double-headed motor to stop working, the brake state is kept, and the bottom of the carbon collecting chamber 213 is opened, and the material in the stirring chamber 213 falls into the stirring chamber 31.

The pressure contact switch controls the double-headed motor to stop and simultaneously controls the air storage barrel 223 to supply air to the air motor 314, so that the air motor 314 drives the stirring rod 312 to rotate, metal oxides in the materials react with hydrochloric acid to obtain high-purity carbon powder, the air motor 314 stops working after the compressed air in the air storage barrel 223 is used up, meanwhile, the Huadong block 3152 automatically opens the discharging pipe 312 towards the A end Huadong under the action of the magnetic pole, and the mixed solution flows downwards from the through hole 3153.

When the end B of the sliding block 3152 is abutted against the end B of the sliding tube 3151, the first bevel gear 3221 is meshed with the second bevel gear 2211, so that in the process of backward movement of the scraping frame 21, the winding shaft 221 drives the second roller 322 to rotate, the filter screen 323 which is rolled on the first roller 321 in the initial state is rolled on the second roller 322, the spiral spring 324 is wound tightly, the second roller 322 is still when the double-headed motor brakes, when the sliding block 3152 moves towards the end B of the sliding tube 3151, namely, when the discharging tube 312 is opened, the sliding block 3152 drives the first bevel gear 3221 to move and is out of meshing with the second bevel gear 2211 through the toggle rod 3154, after the meshing is out of meshing, the spiral spring 324 starts to reset, so as to drive the first roller 321 to rotate, the filter screen 323 is rolled on the first roller 321 again, in the process of rolling, the filter screen 323 falls on the upper plane of the filter screen 323 to the collecting chamber 33, thus high-purity filter screen filtrate is obtained, the second roller 322 is arranged on the filter chamber 34 in a damping rotation mode, when the sliding block 3152 moves towards the end of the sliding tube 3151, namely, when the carbon powder is completely rolled on the first roller 321, and the filter screen 31 falls on the filter screen 33 in the constant speed chamber, and the whole stirring chamber can rotate slowly after the stirring process is completely.

When the sliding plate 214 is fully opened and the pressing contact is performed on the pressing contact switch, the pressing contact switch controls the front and rear doors of the carburizing furnace 1 to be closed, the scraping frame 21 is located at the rear end of the sliding groove 11 and located at the outer side of the inner cavity of the carburizing furnace 1, after the carburizing operation is completed in the whole day, an operator presses the closing switch, the power supply is cut off, the front and rear doors of the carburizing furnace 1 are automatically opened, the scraping frame 21 is restored to the initial state forward, and when the next carburizing furnace is started again, the cleaning operation is automatically performed, and after the initial state is restored, the front and rear doors of the carburizing furnace 1 are automatically closed.

The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. Passenger car torsion beam heat treatment device, its characterized in that: comprises a carburizing furnace (1), wherein a cleaning device (2) for cleaning the inner wall is arranged in the carburizing furnace (1), and a post-treatment device (3) for collecting carbon powder is arranged at the rear end;

the cleaning device (2) comprises a scraping frame (21) and a power device (22), wherein a sliding groove (11) is formed in the carburizing furnace (1), the hanging and sweeping frame (21) is arranged in the sliding groove (11) in a guiding sliding manner, a roller (211) and a wind blade (212) are arranged in the hanging and sweeping frame (21) in a rotating manner, the roller (211) is pressed on the sliding groove (11) and connected with the wind blade (212) through a belt, the wind blade (212) rotates to suck scraped carbon powder into a carbon collecting cavity (213) in the hanging and sweeping frame (21), a winding shaft (221) is arranged on the power device (22), one end of a pull rope (23) is connected to the winding shaft (221), the other end of the pull rope (23) is connected to the scraping and sleeved with a first elastic piece, two ends of the pull rope (23) are respectively pressed on the scraping frame (21) and the rear end wall of the sliding groove (11), the winding shaft (221) can wind the pull rope (23) on the winding shaft (221), so that the scraping frame (21) can be pulled to move, and carbon powder can be collected in the carbon collecting cavity (213) after the scraping frame (21) is scraped;

the post-treatment device (3) comprises a stirring chamber (31) and a filtrate chamber (34), wherein a feed pipe (311) is arranged on the stirring chamber (31), a sliding plate (214) is elastically arranged at the lower end of a carbon collecting cavity (213) in a sliding manner, a hydrochloric acid solution is arranged in the filtrate chamber (34), a conveying pipe (341) is connected between the bottom of the filtrate chamber (34) and the stirring chamber (31), a rotary pump (342) is arranged on the conveying pipe (341), the rotary pump (342) is connected with a power device (22), so that the hydrochloric acid solution is injected into the stirring chamber (31) in the process of pulling and sweeping the frame (21) to move, and the sliding plate (214) can be propped against the feed pipe (311) after the sweeping frame (21) moves from the front end to the rear end of the carburizing furnace (1), so that all carbon powder collected inside is aligned with the feed pipe (311) and enters the stirring chamber (31).

2. The torsion beam heat treatment device for a passenger car according to claim 1, wherein: the appearance of the hanging and sweeping frame (21) is the same as the size of the inner cavity of the carburizing furnace (1), the hanging and sweeping frame (21) is provided with a hanging and sweeping plate (215), the hanging and sweeping plate (215) can be pressed and contacted with the inner wall of the carburizing furnace (1), thereby carbon powder is scraped off, a plurality of air suction holes (216) are formed in the circumferential direction of the hanging and sweeping frame (21), the air suction holes (216) are communicated with a carbon collecting cavity (213), the carbon collecting cavity (213) is communicated with a rotating chamber of a fan blade (212), and a filter screen is arranged at the joint of the carbon collecting cavity (213) and the rotating chamber of the fan blade (212), so that the carbon powder can be collected in the carbon collecting cavity (213).

3. The torsion beam heat treatment device for a passenger car according to claim 1, wherein: the stirring chamber (31) is further provided with a stirring rod (313), the stirring rod (312) is provided with a pneumatic motor (314), the lower end of the stirring chamber (31) is provided with a discharging pipe (312), the discharging pipe (312) is provided with a switching device (315), the power device (22) is further connected with an air pump (222), the air pump (222) can rotate to press air into the air storage barrel (223), and the pneumatic motor (314) is connected with the air storage barrel (223).

4. A torsion beam heat treatment apparatus for a passenger vehicle according to claim 3, wherein: the switch device (315) comprises a sliding tube (3151), the sliding tube (3151) vertically penetrates through the discharging tube (312), a sliding block (3152) is arranged in the sliding tube (3151), a through hole (3153) is formed in the sliding block (3152), the A end of the sliding tube (3151) is communicated with the air storage barrel (223), a magnetic pole is arranged at the B end of the sliding block (3152), the same magnetic pole as the sliding tube (3151) is arranged at the B end of the sliding block (3152), when compressed air does not exist in the air storage barrel (223), the sliding block (3152) is propped against the A end under the action of the magnetic pole, at the moment, the through hole (3153) is aligned with the discharging tube (312), air pressure in the air storage barrel (223) rises, the sliding block (3152) is propped against the B end under the action of the air pressure, and the through hole (3153) is dislocated with the discharging tube (312).

5. The torsion beam heat treatment device for a passenger car according to claim 1, wherein: the aftertreatment device (3) further comprises a filtering device (32) and a collecting chamber (33), the filtering device (32) comprises a first roller (321), a second roller (322) and a filter screen (323), the second roller (322) is rotationally arranged on the filtrate chamber (34), the first roller (321) is rotationally arranged on the collecting chamber (33), the first roller (321) is arranged in a cavity, the inner wall is provided with the outer end of a scroll spring (324), the inner end of the scroll spring (324) is arranged on the collecting chamber (33), one end of the filter screen (323) is arranged on the second roller (322), the other end of the filter screen (323) is wound on the first roller (321), and the lower end of a discharging pipe (312) is aligned with the filter screen (323).

6. The torsion beam heat treatment device for a passenger car according to claim 5, wherein: the rotary shaft of the second roller (322) is provided with a first bevel gear (3221) in a sliding manner, the winding shaft (221) is provided with a second bevel gear (2211), the first bevel gear (3221) is provided with a ring groove, the end B of the sliding block (3152) is provided with a poking rod (3154), the front end of the poking rod (3154) is located in the ring groove, the sliding block (3152) moves left and right, and the first bevel gear (3221) is controlled to be meshed with or separated from the second bevel gear (2211).

7. The heat treatment process of the torsion beam of the passenger car is characterized by comprising the following steps of:

s1, pretreatment: the pipe fitting is vertically placed, is placed into equipment for pretreatment, eliminates stress generated by forming, reduces heat treatment deformation, prepares for the next working procedure, and has the temperature of 500-600 ℃ and the treatment time of 60-150 min;

s2, carburizing: transferring the product treated in the step S1 into equipment with a specific protective atmosphere for heating carburization treatment, eliminating decarburization generated in the forming process of the product, setting the temperature to 850-950 ℃ and the treatment time to 30-60 min;

s3, quenching treatment: pre-cooling the product in the S2, putting the product into an oil tank for quenching, and adjusting the temperature of the oil and the stirring speed in the quenching process;

s4, cleaning: carrying out surface cleaning and decontamination on the product after the treatment of the step S3, and drying;

s5, tempering: and (3) putting the product dried in the step S4 into equipment for tempering treatment, wherein the tempering temperature is 200-350 ℃, and the tempering time is 120-180 min.