Technical Field
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The utility model belongs to the technical field of quenching equipment, especially, relate to a high frequency quenches machine for ring gear quenches.
Background
The induction hardening refers to a heat treatment method in which a surface hardened layer is obtained by locally heating and cooling the surface of a workpiece by using an induction current (30K to 1000 KHZ). The method only strengthens the surface of the workpiece to a certain depth, and the core basically maintains the structure and the performance before treatment, so that the combination of high strength, high wear resistance and high toughness can be obtained. And because of local heating, quenching deformation can be obviously reduced, and energy consumption is reduced. It is because of these features that high-frequency quenching is widely used in the machining industry.
At present, Chinese patent with publication number CN109593932A proposes a high-frequency quenching device for valve and its process. The high-frequency quenching equipment for the valve comprises a power supply, an induction coil electrically connected with the power supply and a cooling pool, wherein a lifting platform is arranged in the cooling pool, a lifting mechanism used for controlling the lifting platform to lift is arranged on the cooling pool, the lifting mechanism is a hydraulic cylinder, and an output shaft of the hydraulic cylinder slidably extends into the cooling pool and is fixedly connected with the lifting platform. When the workpiece is quenched, the workpiece is placed on the lifting platform, then the workpiece is heated through the induction coil, the output shaft of the hydraulic cylinder is retracted after the workpiece is heated, and the workpiece falls into the cooling pool along with the lifting platform to be quenched.
Among the above-mentioned technical scheme, because the cooling bath need be for the work piece quenching cooling, can flow in the cooling bath has liquid coolant, and the output shaft of pneumatic cylinder need pass the cooling bath, and pneumatic cylinder and cooling bath are sliding connection moreover, therefore coolant reveals from the junction of output shaft and cooling bath easily.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a high frequency quenching machine that is used for ring gear quenching that prevents that coolant from revealing.
The utility model discloses a can realize through following technical scheme:
a high-frequency quenching machine for gear ring quenching comprises a rack and a material placing frame, wherein an induction coil, a lifting device and a quenching tank are arranged on the rack, the induction coil is circular, the axis of the induction coil is vertical, the induction coil is fixedly connected to the rack, the induction coil is sleeved outside the material placing frame, the material placing frame is connected with the rack in a sliding mode along the axial direction of the induction coil, and the quenching tank is arranged below the induction coil;
the lifting device comprises a driving motor, at least three first connecting rods and second connecting rods with the same number as the first connecting rods, the driving motor is fixedly arranged at the upper end of the rack or the quenching tank, the first connecting rods and the second connecting rods are uniformly distributed along the axis of the induction coil, one end of one of the first connecting rods is connected with the driving motor in a key mode, one ends of the other first connecting rods are hinged to the rack, the other end of the first connecting rod is hinged to one end of the second connecting rod, and the other end of the second connecting rod is hinged to the discharging rack.
According to the technical scheme, the driving motor rotates, the first connecting rod and the second connecting rod are in transmission, so that the discharging frame can slide along the axial direction of the induction coil, and the lifting of the discharging frame is completed; through holes do not need to be formed in the quenching tank, so that the quenching tank and the rack are shaped integrally, and the leakage of a cooling medium in the quenching tank is avoided.
Furthermore, still be provided with clamping device on the blowing frame, clamping device includes the center pin, first axle sleeve, a plurality of third connecting rods, locking mechanism and the tight piece of clamp the same with third connecting rod quantity, the center pin is coaxial with induction coil, first axle sleeve cover is established on the circumferential surface of center pin, press from both sides tight piece and blowing frame sliding connection, and press from both sides the axle center of the slip direction perpendicular to center pin of tight piece, the one end of third connecting rod is articulated with pressing from both sides tight piece, the other end of third connecting rod is articulated with first axle sleeve, locking mechanism sets up on first axle sleeve.
Through the technical scheme, after the gear ring is placed on the material placing frame, the plurality of clamping blocks can move simultaneously by sliding the first shaft sleeve, the moving distances of the plurality of clamping blocks are the same, the clamping blocks are abutted against the inner circumferential surface of the gear ring, then the gear ring can be clamped through the locking mechanism, and the operation is simple and the clamping is fast; and the clamped gear ring and the central shaft have the same axis, so that the gear ring is conveniently heated by the induction coil.
Furthermore, the locking mechanism comprises a second shaft sleeve, the second shaft sleeve and the first shaft sleeve are coaxial, an internal thread is arranged at one end, close to the first shaft sleeve, of the second shaft sleeve, a reducing external thread is arranged at one end, close to the second shaft sleeve, of the first shaft sleeve, and the first shaft sleeve is in threaded connection with the second shaft sleeve.
Through the technical scheme, the second shaft sleeve is screwed after the clamping block is tightly abutted to the gear ring, the first shaft sleeve is deformed due to the arrangement of the reducing external threads on the first shaft sleeve, and the deformed first shaft sleeve tightly holds the central shaft, so that the clamping device can be locked.
Furthermore, one end of the first shaft sleeve, which is close to the second shaft sleeve, is provided with a plurality of shrinkage grooves along the axial direction of the first shaft sleeve.
Through above-mentioned technical scheme, when first axle sleeve takes place to warp, the deformation that first axle sleeve produced can be absorbed to the shrink groove, makes first axle sleeve laminate with the center pin more easily, makes first axle sleeve and center pin connection inseparabler simultaneously.
Furthermore, the surface of the clamping block, which is far away from the central shaft, is provided with anti-skid corrugations.
Through the technical scheme, when the clamping block clamps the inner circumferential surface of the gear ring, the clamping block and the gear ring are not easy to slide relatively.
Further, the blowing frame includes a plurality of bracing pieces, and the quantity of bracing piece is the same with the quantity of second connecting rod, and the bracing piece level is placed, and every bracing piece all is perpendicular with the center pin, the one end fixed connection each other of a plurality of bracing pieces, and the second connecting rod articulates and holds on the bracing piece keeps away from the center pin.
By the technical scheme, the volume of the material placing frame is reduced, and after the gear ring is heated, heat on the gear ring is not easy to conduct heat and dissipate from the material placing frame; and the principle of induction coil heating is the electromagnetic induction principle, also can give the blowing frame heating when giving the ring gear heating, reduces the volume of blowing frame and can reduce the energy that induction coil given the blowing frame heating, has reduced the energy consumption.
Furthermore, one end of the support rod, which is far away from the central shaft, is provided with a limiting block for limiting the rotation angle of the second connecting rod.
Through above-mentioned technical scheme, avoid second connecting rod turned angle too big, make the second connecting rod perpendicular with the slip direction of blowing frame, the dead point appears.
Furthermore, the number of the clamping blocks is the same as that of the supporting rods, the clamping blocks are sleeved on the supporting rods, and the clamping blocks are connected with the supporting rods in a sliding mode.
Through above-mentioned technical scheme, make and press from both sides tight piece and slide along the bracing piece, and bracing piece upper portion need not set up the spout again, because in the blowing frame need whole dipping cooling medium, can produce impurity because of quenching in the cooling medium, so set up and can avoid the slip that the tight piece is pressed from both sides in the influence of impurity.
To sum up, with current technical contrast, the beneficial effects of the utility model are as follows:
1. through the arrangement of the lifting device, a through hole does not need to be formed in the quenching tank, the quenching tank and the rack are shaped integrally, and leakage of cooling media in the quenching tank is avoided.
2. Through the arrangement of the clamping device, the plurality of clamping blocks can move simultaneously by sliding the first shaft sleeve, the moving distances of the plurality of clamping blocks are the same, and the operation is simple and the clamping is quick; and the clamped gear ring and the central shaft have the same axis, so that the gear ring is conveniently heated by the induction coil.
3. Through the setting of bracing piece for the blowing frame receives induction coil's influence less, and the energy that the blowing frame absorbed is less, has reduced the energy consumption.
4. Through will press from both sides tight piece cover and establish on the bracing piece, need not set up the spout from the blowing frame again, the slip of tight piece is pressed from both sides to impurity in the coolant medium is difficult for influencing.
Drawings
FIG. 1 is a schematic view of the overall structure of the present embodiment;
FIG. 2 is an enlarged view of A in FIG. 1;
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fig. 3 is a schematic structural diagram of the material placing frame and the clamping device according to the embodiment;
fig. 4 is an enlarged schematic view of B in fig. 1.
Reference numerals: 1. a frame; 11. an induction coil; 12. a lifting device; 121. a drive motor; 122. a first link; 123. a second link; 13. a quenching tank; 14. a mounting frame; 15. a connecting plate; 16. a height compensation base; 2. a material placing frame; 21. a support bar; 22. a limiting block; 3. a clamping device; 31. a central shaft; 32. a first bushing; 321. a contraction groove; 33. a third link; 34. a clamping block; 35. a locking mechanism; 351. a second shaft sleeve; 352. reducing external thread.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a high-frequency quenching machine for gear ring quenching comprises a frame 1, wherein a quenching tank 13 is arranged on the frame 1, a material feeding frame 2, a lifting device 12 for lifting the material feeding frame 2 and an induction coil 11 for heating the gear ring are arranged above the quenching tank 13. The gear ring is placed on the material placing frame 2, then the gear ring is moved to the position on the same horizontal plane with the induction coil 11 through the lifting device 12, the circumferential surface of the gear ring is heated through the induction coil 11, after heating is finished, the material placing frame 2 and the gear ring are moved to the quenching tank 13 through the lifting device 12, and the material placing frame 2 and the gear ring are immersed into a cooling medium in the quenching tank 13 for cooling.
The induction coil 11 is mostly a circular hollow copper pipe, the induction coil 11 is fixed by inserting or clipping, in this embodiment, an installation frame 14 for installing the induction coil 11 is welded at the bottom of the quenching tank 13, and the induction coil 11 is inserted on the installation frame 14; when the induction coil 11 is inserted into the mounting rack 14, the axis thereof is vertical, and the induction coil 11 is sleeved outside the material placing rack 2 but is not in direct contact with the material placing rack 2.
Referring to fig. 1 and 2, the lifting device 12 includes a driving motor 121, at least three first connecting rods 122, and a number of second connecting rods 123 equal to the number of the first connecting rods 122, in this embodiment, three first connecting rods 122 and three second connecting rods 123 are used.
Three connecting plates 15 are welded to the upper end of the quenching tank 13, and the connecting plates 15 face the inside of the quenching tank 13. The driving motor 121 is screwed on one of the connecting plates 15 through a bolt, the height compensation seats 16 are welded on the surfaces, far away from the quenching tank 13, of the other two connecting plates 15, one end of one of the first connecting rods 122 is in key connection with the output shaft of the driving motor 121, one ends of the other two first connecting rods 122 are hinged to the two height compensation seats 16 respectively, the other ends of the three first connecting rods 122 are hinged to one end of the second connecting rod 123 respectively, and the other end of the second connecting rod 123 is hinged to the discharging rack 2. The first connecting rod 122 and the second connecting rod 123 are uniformly arranged along the axis of the induction coil 11.
Referring to fig. 2 and 3, the material loading frame 2 includes a plurality of support rods 21, and in the present embodiment, the number of the support rods 21 is the same as that of the second connecting rods 123, so that the number of the support rods 121 is three. The support rods 21 are horizontally arranged, each support rod 21 is perpendicular to the axis of the inductive coil 11 and points to the axis of the inductive coil 11, and one ends of the support rods 21 close to the inductive coil 11 are welded together. The end of the second connecting rod 123 far away from the first connecting rod 122 is hinged to the end of the supporting rod 21 far away from the axle center of the induction coil 11.
Referring to fig. 3, the material rack 2 is provided with a clamping device 3 for clamping the gear ring. The clamping device 3 comprises a central shaft 31, a first shaft sleeve 32, three third connecting rods 33, three clamping blocks 34 and a locking mechanism 35.
The central shaft 31 is coaxial with the induction coil 11, and one end of the central shaft 31 near the quenching tank 13 may be welded to the three support rods 21. The first shaft sleeve 32 is sleeved on the circumferential surface of the central shaft 31, and the first shaft sleeve 32 is in clearance fit with the central shaft 31, so that the first shaft sleeve 32 can slide along the central shaft 31. The clamping block 34 is sleeved on the support rod 21, the clamping block 34 is connected with the support rod 21 in a sliding mode along the length direction of the support rod 21, and anti-skid corrugations are further arranged on one surface, far away from the central shaft 31, of the clamping block 34. The third connecting rod 33 is hinged to the clamping block 34 and the first shaft sleeve 32 at two ends.
Referring to fig. 4, the locking mechanism 35 is disposed on the first sleeve 32, and the locking mechanism 35 includes a second sleeve 351 and a variable-diameter external thread 352 opened on the first sleeve 32. The second sleeve 351 is also sleeved outside the central shaft 31, and the second sleeve 351 and the central shaft 31 are connected in a sliding manner along the axial direction of the central shaft 31. An internal thread is formed at one end, close to the first shaft sleeve 32, of the second shaft sleeve 351, a reducing external thread is formed at one end, close to the second shaft sleeve 351, of the first shaft sleeve 32, and the internal thread is in threaded connection with the reducing external thread 352.
Preferably, the first sleeve 32 has a plurality of shrink grooves 321 along the axial direction of the first sleeve 32 at the position having the reducing external thread 352.
Referring to fig. 2 and 3, a stopper 22 is welded to an end of the support rod 21 away from the central shaft 31 to prevent the second connecting rod 123 from being parallel to the support rod 21 and forming a dead point.
The implementation principle of the embodiment is as follows:
in the initial position, the material placing frame 2 is higher than the induction coil 11, and the first shaft sleeve 32 and the second shaft sleeve 351 are separated; at the moment, the gear ring is placed on the material placing frame 2, then the first shaft sleeve 32 slides towards the supporting frame 21, and the clamping block 34 is clamped on the inner circumferential surface of the gear ring through the transmission of the third connecting rod 33; then, the second shaft sleeve 351 is screwed on the first shaft sleeve 32, and the clamping of the gear ring is completed; then, the gear ring is driven by the driving motor 121 and is driven by the first connecting rod 122 and the second connecting rod 123, and the gear ring is dropped to the position with the same height as the induction coil 11; the induction coil 11 then heats the outer circumferential surface of the ring gear.
After heating, the driving motor 121 continues to rotate in the same direction, so that the gear ring continues to move downwards until the second connecting rod 123 abuts against the limiting block 22, and at the moment, the gear ring is completely immersed in the cooling medium in the quenching tank 13 to start quenching;
after quenching is finished, the driving motor 121 rotates reversely to lift the material placing frame 2 to the initial position; and then loosening the first shaft sleeve 32 and the second shaft sleeve 351, sliding the first shaft sleeve 32 and the second shaft sleeve 351 along the direction far away from the support rod 21, further loosening the clamping block 34, and taking down the gear ring after quenching to finish a cycle.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
What is induction quenching?
Induction hardening is a type of surface hardening in which a metal part is heated by induction and then hardened. The quenched metal undergoes a martensitic transformation, which increases the hardness and brittleness of the parts. Induction hardening is used to selectively harden areas of a part or assembly without affecting the overall properties of the part
Whtat is induciton temering?
Induction tempering is a form of subcritical heat treatment, mainly used to improve the ductility, toughness, and dimensional stability of the workpiece, eliminate residual stress, and obtain specific mechanical property values.
Induction tempering can be performed on all hardened components such as rods, joints, and shafts. Induction tempering solutions exist in the automotive and automotive supply industries.
What is the difference between tempering and annealing?
Tempering treatment is generally carried out after quenching. The heat treatment combined with high-temperature tempering after quenching is called quenching & tempering treatment.
Its purpose is to increase the hardness and toughness of the workpiece and stabilize the size of the workpiece to ensure that it will not be deformed during use. Widely used in important structural parts of automobiles, tractors, machine tools, etc., such as connecting rods, bolts, gears, and shafts. The hardness after tempering is generally HB200-330.
Annealing is generally carried out before quenching, the main purpose is to eliminate the residual stress caused by plastic deformation processing, welding, etc., and existing in the casting, and prevent it from affecting the accuracy of the workpiece. For iron and steel products heated to 100-200°C below the temperature at which austenite begins to form, cooling in the air after heat preservation can eliminate internal stress.
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