CN112430715A

CN112430715A - Quenching machine and camshaft machining process using same

Info

Publication number: CN112430715A
Application number: CN202011363171.2A
Authority: CN
Inventors: 杨卫国; 朱海清
Original assignee: Jingjiang Guomao Auto Parts Manufacturing Co ltd
Current assignee: Jingjiang Guomao Auto Parts Manufacturing Co ltd
Priority date: 2020-11-28
Filing date: 2020-11-28
Publication date: 2021-03-02

Abstract

The application relates to a quenching machine and a camshaft machining process using the same, in particular to a camshaft quenching device, wherein the surface of a load chain is uneven, and when the load chain is wound on a rotating shaft fluted disc, the load chain has higher pressure on the rotating shaft fluted disc, so that the rotating shaft fluted disc is easy to break, operation accidents occur, and potential safety hazards are caused; in order to solve the technical problem, the technical scheme comprises a shell, a fixed base assembly and a movable pressing assembly, wherein the fixed base assembly is positioned at the bottom of the inner side of the shell, the movable pressing assembly is positioned at the top of the inner side of the shell, and the movable pressing assembly comprises an ejector pin, a moving device and a pressing device; the moving device comprises a motor and a screw rod, the pressing device is in threaded connection with the screw rod, the screw rod is driven by the motor to rotate, and the motor is arranged on the outer top wall; the thimble is arranged on the pressing device. The application has the effect of improving the safety of the heavy-load moving device during operation.

Description

Quenching machine and camshaft machining process using same

Technical Field

The application relates to the field of camshaft quenching devices, in particular to a quenching machine and a camshaft machining process using the same.

Background

The quenching is to convert the super-cooled austenite into martensite or bainite to obtain martensite or bainite structure, and then to improve the rigidity, hardness, wear resistance, fatigue strength, toughness and the like of the steel by tempering at different temperatures, thereby meeting different use requirements of various mechanical parts and tools.

The patent document of the prior application document CN105886721A provides a high-frequency quenching device, which comprises a rack, a motor, a quenching ring and a turntable, wherein the turntable is arranged at the bottom of the rack and is connected with the motor; when the quenching ring is positioned at the upper thimble position, the motor is started, the loading plate drives the upper thimble to move upwards, the quenching ring moves downwards at the moment, and when the quenching ring reaches the lower thimble position, the motor drives the loading plate and the upper thimble to move downwards at the moment.

To the above-mentioned correlation technique, the inventor thinks that pivot fluted disc and heavy burden chain mutually support and make the heavy burden board do the elevating movement in vertical direction, nevertheless because the heavy burden chain surface is uneven, when the heavy burden chain was around establishing on the pivot fluted disc, the pressure of heavy burden chain to the pivot fluted disc was great, leads to the pivot fluted disc fracture easily, the operation accident appears, causes the potential safety hazard.

Disclosure of Invention

In order to improve the safety of the load moving device during operation, the application provides a quenching machine and a camshaft machining process using the quenching machine.

In a first aspect, the present application provides a quenching machine, which adopts the following technical scheme:

a quenching machine comprises a shell, a fixed base assembly and a movable pressing assembly, wherein the fixed base assembly is positioned at the bottom of the inner side of the shell, the movable pressing assembly is positioned at the top of the inner side of the shell, and the movable pressing assembly comprises an ejector pin, a moving device and a pressing device; the moving device comprises a motor and a screw rod, the pressing device is in threaded connection with the screw rod, the screw rod is driven by the motor to rotate, and the motor is arranged on the top wall of the outer side; the thimble is arranged on the pressing device; the shell inside wall is provided with the guide rail, the guide rail symmetry sets up in the lead screw both sides, the setting of sliding of push down device is on the guide rail.

By adopting the technical scheme, when the camshaft needs to be quenched, the motor is started to drive the screw rod to rotate, the push-down device drives the thimble to move towards the direction close to the fixed base assembly along the guide rail, and when the thimble moves to the height matched with the length of the camshaft, the motor is turned off; at the moment, the camshaft is placed on the fixed base assembly, one end of the camshaft props against the fixed base assembly, and the other end of the camshaft props against a thimble on the pressing device; at the moment, the position of the cam shaft is stable, a switch on the power supply control cabinet is started, the cam shaft is quenched, and the moving pressing assembly is higher in operation safety due to the fact that the lead screw, the guide rail and the pressing device are matched.

Optionally, the pressing device includes a pressing base, a fixing sleeve, a pressing sleeve rod and an elastic member, the pressing base and the screw rod are in threaded connection, the pressing base is provided with a preformed hole, and the fixing sleeve is arranged on the top wall of the pressing base; the downward pressing loop bar is slidably inserted into the fixed sleeve, the elastic piece is located between the downward pressing loop bar and the inner top wall of the fixed sleeve, and the thimble is fixed at one end of the downward pressing loop bar.

By adopting the technical scheme, when the lower pressing seat moves to the height matched with the length of the camshaft, the motor is turned off, the lower pressing sleeve rod is manually moved into the fixed sleeve at the moment, the elastic part is compressed at the moment, the camshaft is smoothly blocked between the fixed base seat component and the lower pressing seat, the pressure on the lower pressing sleeve rod is released at the moment, the lower pressing sleeve rod moves towards the camshaft under the elastic action of the elastic part, and finally the two ends of the camshaft are all pushed by the ejector pins; the fixed sleeve, the lower pressing sleeve rod and the elastic piece are matched, so that the safety of the operation of the movable lower pressing assembly is higher, and the occurrence of the condition of abrasion and fracture of the movable lower pressing assembly is further reduced.

Optionally, limiting long holes are symmetrically formed in the outer edge side wall of the fixing sleeve, limiting rods are symmetrically arranged on the outer edge side wall of the downward pressing sleeve rod, and one ends, far away from the direction of the downward pressing sleeve rod, of the limiting rods penetrate through the limiting long holes.

The common limiting mode is that a limiting ring sheet is generally arranged in a downward pressing sleeve rod, a limiting ring groove is formed in a fixed sleeve, and the limiting ring sheet is limited by the limiting ring groove to limit the movement of the downward pressing sleeve rod, but the limiting mode is difficult to observe the position of the downward pressing sleeve rod visually; through adopting above-mentioned technical scheme, the limiting displacement's of spacing slot hole pair gag lever post restriction mode as pushing down loop bar displacement in fixed sleeve, can be according to the position of gag lever post, the position of audio-visual understanding pushing down the loop bar.

Optionally, a protection cushion is arranged on the inner side wall of the limiting long hole and is located in the direction of the limiting long hole close to the ejector pin.

Through adopting above-mentioned technical scheme, under the elastic force effect of elastic component, the gag lever post supports on spacing slot hole inside wall for a long time, and the compliance of protection cushion can play the guard action to gag lever post and spacing slot hole simultaneously.

Optionally, the limiting rod is symmetrically provided with auxiliary plates in a rotating manner, the auxiliary plates are provided with lower pressing rods, and gaps exist between the auxiliary plates and the fixing sleeve; the connecting rod is arranged on the fixed sleeve, one end of the connecting rod, which is far away from the direction of the fixed sleeve, is symmetrically and rotatably connected with connecting plates, the lower pressing rod is positioned between the symmetrically arranged connecting plates, and the lower pressing rod is rotatably connected on the symmetrical connecting plates.

By adopting the technical scheme, the lower pressing rod is pressed, the lower pressing sleeve rod moves towards the deep direction of the fixed sleeve, the camshaft is placed on the thimble of the fixed seat, and one end of the camshaft props against the thimble of the fixed seat; slowly removing the pressure of the pressing rod to enable the pressing sleeve rod to move towards the direction close to the fixed seat under the elastic action of the elastic piece; the cooperation of depression bar and supplementary plate down has made things convenient for and has pushed down the removal of loop bar in fixed sleeve.

Optionally, a position-limiting cushion is arranged at the rotary connection position of the connecting rod and the connecting plate.

Through adopting above-mentioned technical scheme, when pressing the depression bar, spacing cushion plays the guard action to the depression bar, alleviates to press the depression bar and results in the connecting rod to collide with the condition emergence of damaging with too hard.

Optionally, the fixing sleeve is sleeved with a reinforcing pipe, the reinforcing pipe is located at the reserved hole, and reinforcing ring plates are arranged on two sides of the reinforcing pipe in the length direction.

Through adopting above-mentioned technical scheme, the reinforced pipe has increased the connection area between fixed sleeve and the seat that pushes down to the stability that fixed sleeve and the seat that pushes down are connected has been improved.

Optionally, the top wall of the fixed sleeve is provided with a replacement hole, and the fixed sleeve is located in the replacement hole and provided with a replacement cover.

Through adopting above-mentioned technical scheme, the elasticity effect of elastic component reduces easily along with the lapse of time, needs in time to change the elastic component to make the push down subassembly play the push down effect to the camshaft at any time, thereby stability when improving the quenching of camshaft.

In a second aspect, the application provides a camshaft machining process using the quenching machine, which adopts the following technical scheme:

a camshaft machining process using the quenching machine comprises the following steps:

s1, controlling a switch on a power supply control cabinet, and preheating the quenching machine;

s2, placing one end of the camshaft on the fixed base assembly and keeping the camshaft in a vertical state;

s3, starting a motor, enabling the screw rod to rotate, driving the pressing device to move towards the direction close to the fixed base assembly, and closing the motor when a thimble on the pressing device is abutted against the camshaft;

s4, closing the movable door of the shell; starting a switch on the power supply control cabinet, and simultaneously quenching the joints at the two ends of the cam shaft;

and S5, removing the quenched camshaft and naturally cooling the camshaft.

Through adopting above-mentioned technical scheme, the both ends of camshaft are quenched simultaneously, have improved the machining efficiency of camshaft, and lead screw and motor complex mobile device make the security of camshaft in the quenching process higher simultaneously.

Optionally, in step S4, after the camshaft is quenched, the camshaft is kept warm.

By adopting the technical scheme, the heat preservation treatment is adopted in the quenching process for the camshafts, so that the temperatures of the camshafts tend to be consistent, and the deformation condition of the camshafts is reduced.

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

1. the safety of the operation of the movable pressing component is higher by the matching of the screw rod, the guide rail and the pressing device;

2. the fixed sleeve, the pressing sleeve rod and the elastic piece are matched, so that the operation safety of the movable pressing assembly is higher, and the occurrence of abrasion and fracture of the movable pressing assembly is reduced;

3. the cooperation of depression bar and supplementary plate down has made things convenient for and has pushed down the removal of loop bar in fixed sleeve.

Drawings

Fig. 1 is a schematic structural view of a high-frequency quenching machine in an embodiment of the present application.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a schematic structural diagram of a pressing device in the embodiment of the present application.

Fig. 4 is an exploded schematic view for showing the connection relationship between the reinforced pipe and the lower pressure seat in the embodiment of the present application.

Description of reference numerals: 1. a housing; 2. fixing the base assembly; 21. a fixed seat; 3. moving the hold-down assembly; 31. a thimble; 32. a mobile device; 321. a screw rod; 33. a pressing device; 331. pressing down the base; 3311. reserving a hole; 3312. a reinforcement tube; 3313. a reinforcing ring plate; 332. fixing the sleeve; 3321. limiting long holes; 3322. a connecting rod; 3323. a connecting plate; 3324. a limit cushion; 3325. protecting the soft cushion; 3326. replacing the hole; 3327. replacing the cover; 333. pressing down the loop bar; 3331. a limiting rod; 334. an elastic member; 335. an auxiliary plate; 3351. a lower pressure lever; 4. a guide rail.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The high-frequency quenching machine comprises a high-frequency quenching heating device, cooling liquid and a cooling oil tank which collects the cooling liquid and circulates the cooling liquid, wherein the high-frequency quenching heating device comprises a high-frequency power supply control cabinet and an induction coil connected with a high-frequency power supply circuit.

The embodiment of the application discloses a quenching machine. Referring to fig. 1, the high-frequency quenching machine further comprises a housing 1, a fixed susceptor assembly 2 and a movable pressing assembly 3, wherein the fixed susceptor assembly 2 is positioned at the bottom of the inner side of the housing 1, and the movable pressing assembly 3 is positioned at the top of the inner side of the housing 1.

Referring to fig. 1 and 2, the fixed base assembly 2 includes a fixed base 21 and a thimble 31, the fixed base 21 includes a turntable driven by a motor, and the thimble 31 is rotatably connected to the turntable by a bearing; the bottom of the camshaft abuts against the thimble 31 at the fixed seat 21.

Referring to fig. 1 and 3, the moving and pressing assembly 3 includes a thimble 31, a moving device 32, and a pressing device 33; the moving device 32 comprises a motor and a screw rod 321, the motor is fixed on the housing 1 through a bolt, a driving shaft of the motor penetrates through the housing 1, one end of the screw rod 321 is fixedly connected with the driving shaft of the motor, the other end of the screw rod 321 is rotatably connected on the bottom wall of the housing 1 through a bearing, and the screw rod 321 is driven to rotate by the motor.

Referring to fig. 1 and 3, the pressing device 33 includes a pressing base 331, a screw rod 321 penetrates through the pressing base 331, and the screw rod 321 is in threaded connection with the pressing base 331 and is driven to rotate by the screw rod 321 so as to control the pressing base 331 to reciprocate in a vertical direction.

Referring to fig. 1 and 3, the inner side wall of the housing 1 is fixedly provided with guide rails 4 through bolts, the guide rails 4 are symmetrically arranged on two sides of the screw rod 321, the lower pressing base 331 is slidably arranged on the guide rails 4, the lower pressing base 331 slides along the length direction of the guide rails 4, and the cross section of the guide rails 4 can be circular so as to limit the movement of the lower pressing base 331 in the horizontal direction.

Referring to fig. 3, the pressing device 33 further includes a fixing sleeve 332, a pressing sleeve rod 333 and an elastic member 334, the pressing sleeve rod 333 is inserted into the fixing sleeve 332, the thimble 31 is welded and fixed to one end of the pressing sleeve rod 333 away from the fixing sleeve 332, the elastic member 334 is located in the fixing sleeve 332, the elastic member 334 is located between the top wall of the fixing sleeve 332 and the pressing sleeve rod 333, and the elastic member 334 may be a spring; the sliding movement of the push-down stem 333 within the fixed sleeve 332 is achieved by the elastic deformation of the elastic member 334.

Referring to fig. 3 and 4, a preformed hole 3311 is formed in the lower pressing base 331, a reinforcing tube 3312 is disposed on the inner sidewall of the preformed hole 3311, two reinforcing ring plates 3313 are integrally formed on the reinforcing tube 3312, the two reinforcing ring plates 3313 are respectively located on two sides of the reinforcing tube 3312 in the length direction, the two reinforcing ring plates 3313 are respectively attached to the top wall of the lower pressing base 331 and the bottom wall of the lower pressing base 331, one end of the opening of the fixing sleeve 332 is inserted into the reinforcing tube 3312, and the fixing sleeve 332 is welded and fixed to the reinforcing tube 3312.

Referring to fig. 4, the fixing sleeve 332 is symmetrically provided with a limiting long hole 3321, the lower pressing sleeve rod 333 is symmetrically provided with a limiting rod 3331, the limiting rod 3331 is welded on the lower pressing sleeve rod 333, and one end of the limiting rod 3331 far away from the lower pressing sleeve rod 333 penetrates through the limiting long hole 3321; the sliding distance of the stopper rod 3331 is limited by the inner wall of the long stopper hole 3321, and the moving distance of the lower pressure sleeve rod 333 relative to the fixed sleeve 332 is limited.

Referring to fig. 4, the inner side wall of the limit long hole 3321 is provided with a protection cushion 3325, the protection cushion 3325 may be made of rubber, the protection cushion 3325 is fixed on the inner side wall of the limit long hole 3321 by gluing, and the protection cushion 3325 is located in the direction of the limit long hole 3321 close to the thimble 31.

Referring to fig. 4, the fixed sleeve 332 has a replacement hole 3326 formed in a top wall thereof, the fixed sleeve 332 is disposed in the replacement hole 3326 and has a replacement cap 3327 disposed therein, and the replacement cap 3327 is threadedly coupled to an inner wall of the replacement hole 3326.

Referring to fig. 4, the symmetrical limiting rod 3331 is rotatably provided with an auxiliary plate 335, the auxiliary plate 335 is U-shaped, a gap exists between the auxiliary plate 335 and the fixing sleeve 332, the auxiliary plate 335 is provided with a lower pressing rod 3351, and the lower pressing rod 3351 is welded on the auxiliary plate 335.

Referring to fig. 4, a connecting rod 3322 is disposed on the fixed sleeve 332, the connecting rod 3322 is welded on the outer side wall of the fixed sleeve 332, connecting plates 3323 are symmetrically disposed at one end of the connecting rod 3322, the connecting plates 3323 are rotatably connected to the connecting rod 3322 through a pin, and the connecting plates 3323 are located at one end of the connecting rod 3322 away from the fixed sleeve 332; the lower pressing rods 3351 are positioned between the symmetrically arranged connecting plates 3323, and the lower pressing rods 3351 are rotationally connected to the symmetrically arranged connecting plates 3323 through pin shafts; the push-down rod 3351 is pressed to drive the movement of the push-down rod 333 within the fixed sleeve 332.

Referring to fig. 4, a position-limiting cushion 3324 is arranged at the rotary connection position of the connecting rod 3322 and the connecting plate 3323, the position-limiting cushion 3324 may be silica gel, and the position-limiting cushion 3324 is fixed on the connecting rod 3322 by gluing.

The embodiment of the application also discloses a camshaft machining process using the quenching machine, which comprises the following steps:

s2, placing one end of the camshaft on the fixed base assembly 2 and keeping the camshaft in a vertical state;

s3, starting a motor, enabling the screw rod 321 to rotate, enabling the screw rod 321 to drive the pressing device 33 to move towards the direction close to the fixed base assembly 2 along the guide rail, enabling the ejector pin 31 on the pressing device 33 to slowly approach the top end of the camshaft, and when the ejector pin 31 on the pressing device 33 abuts against the camshaft, closing the motor, and enabling the camshaft to be fixed in position by the fixed base assembly 2 and the ejector pin 31 on the pressing device 33;

s4, closing the movable door of the shell 1; starting a switch on the power supply control cabinet, and simultaneously quenching the joints at the two ends of the cam shaft; after quenching treatment of the camshaft, closing a switch on a power supply control cabinet, and carrying out heat preservation on the camshaft for 2 hours;

and S5, when the temperature in the shell 1 is lower than 500 ℃, opening the sliding door of the shell 1, taking down the quenched camshaft, and naturally cooling the camshaft by using a fan.

The implementation principle of the quenching machine in the embodiment of the application is as follows: when the camshaft needs to be quenched, the motor is started to drive the screw rod 321 to rotate, the lower pressing seat 331 is made to move towards the direction close to the fixed seat 21, and when the lower pressing seat is moved to the height matched with the length of the camshaft, the motor is turned off; at this time, the push rod 3351 is pressed to move the push rod 333 to the depth of the fixed sleeve 332, and at this time, the cam shaft is placed on the thimble 31 of the fixed seat, and one end of the cam shaft is pressed against the thimble 31 of the fixed seat 21; the pressure of the pressing down rod 3351 is slowly removed, so that the pressing down sleeve rod 333 moves towards the direction close to the fixed seat 21 under the elastic action of the elastic piece 334, and finally the thimble 31 on the pressing down sleeve rod 333 is propped against the other end of the camshaft; at the moment, the position of the cam shaft is stable, a switch on the power supply control cabinet is started, the cam shaft is quenched, and the moving pressing component 3 is high in operation safety due to the fact that the lead screw 321, the guide rail 4 and the pressing base 331 are matched.

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

Claims

1. The utility model provides a quenching machine, includes shell (1), fixed base subassembly (2) and removes and pushes down subassembly (3), fixed base subassembly (2) are located shell (1) inboard bottom, it pushes down subassembly (3) and is located shell (1) inboard top to remove, its characterized in that: the movable pressing component (3) comprises an ejector pin (31), a moving device (32) and a pressing device (33); the moving device (32) comprises a motor and a screw rod (321), the pressing device (33) is in threaded connection with the screw rod (321), the screw rod (321) is driven to rotate by the motor, and the motor is arranged on the top wall of the shell (1); the ejector pin (31) is arranged on the pressing device (33); the inner side wall of the shell (1) is provided with guide rails (4), the guide rails (4) are symmetrically arranged on two sides of the screw rod (321), and the pressing device (33) is arranged on the guide rails (4) in a sliding mode.

2. The quenching machine of claim 1, wherein: the pressing device (33) comprises a pressing seat (331), a fixed sleeve (332), a pressing sleeve rod (333) and an elastic piece (334), the pressing seat (331) is in threaded connection with the screw rod (321), a preformed hole (3311) is formed in the pressing seat (331), and the fixed sleeve (332) is arranged on the top wall of the pressing seat (331); the downward pressing sleeve rod (333) is inserted in the fixing sleeve (332) in a sliding mode, the elastic piece (334) is located between the downward pressing sleeve rod (333) and the inner top wall of the fixing sleeve (332), and the ejector pin (31) is fixed to one end of the downward pressing sleeve rod (333).

3. The quenching machine of claim 2, wherein: spacing slot hole (3321) have been seted up to the symmetry on the outer fringe lateral wall of fixed sleeve (332), the symmetry is provided with gag lever post (3331) on the outer fringe lateral wall of pushing down loop bar (333), spacing slot hole (3321) is run through to the one end that pushing down loop bar (333) direction was kept away from in gag lever post (3331).

4. The quenching machine of claim 3, wherein: be provided with protection cushion (3325) on spacing slot hole (3321) inside wall, protection cushion (3325) are located the direction that spacing slot hole (3321) are close to thimble (31).

5. The quenching machine of claim 3, wherein: the limiting rod (3331) is symmetrically provided with an auxiliary plate (335) in a rotating manner, the auxiliary plate (335) is provided with a lower pressing rod (3351), and a gap is formed between the auxiliary plate (335) and the fixing sleeve (332); be provided with connecting rod (3322) on fixed sleeve (332), the one end symmetry rotation that fixed sleeve (332) direction was kept away from in connecting rod (3322) is connected with connecting plate (3323), depression bar (3351) are located between connecting plate (3323) that the symmetry set up down, depression bar (3351) swivelling joint is on symmetrical connecting plate (3323) down.

6. The quenching machine of claim 5, wherein: and a limiting cushion (3324) is arranged at the rotary joint of the connecting rod (3322) and the connecting plate (3323).

7. The quenching machine of claim 2, wherein: the fixed sleeve (332) is sleeved with a reinforcing pipe (3312), the reinforcing pipe (3312) is located at the preformed hole (3311), and reinforcing ring plates (3313) are arranged on two sides of the length direction of the reinforcing pipe (3312).

8. The quenching machine of claim 2, wherein: the fixed sleeve (332) top wall is seted up and is changed hole (3326), fixed sleeve (332) are located to change and are provided with in hole (3326) and change and cover (3327).

9. A camshaft machining process using the quenching machine of any one of claims 1 to 8, comprising the steps of:

s2, placing one end of the camshaft on the fixed base assembly (2) and keeping the camshaft in a vertical state;

s3, starting a motor, enabling the screw rod (321) to rotate, driving the pressing device (33) to move towards the direction close to the fixed base assembly (2), and closing the motor when the ejector pin (31) on the pressing device (33) is abutted against the cam shaft;

s4, closing the movable door of the shell (1); starting a switch on the power supply control cabinet, and simultaneously quenching the joints at the two ends of the cam shaft;

and S5, removing the quenched camshaft and naturally cooling the camshaft.

10. A camshaft machining process using a quenching machine is characterized in that: in step S4, after the camshaft is quenched, the camshaft is kept warm.