CN103421934A - Induction quenching system and method for bearing cylindrical face of self-limiting seat of heavy truck plate spring - Google Patents
Induction quenching system and method for bearing cylindrical face of self-limiting seat of heavy truck plate spring Download PDFInfo
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- CN103421934A CN103421934A CN2013104039487A CN201310403948A CN103421934A CN 103421934 A CN103421934 A CN 103421934A CN 2013104039487 A CN2013104039487 A CN 2013104039487A CN 201310403948 A CN201310403948 A CN 201310403948A CN 103421934 A CN103421934 A CN 103421934A
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Abstract
The invention discloses an induction quenching system and method for a bearing cylindrical face of a self-limiting seat of a heavy truck plate spring. The induction quenching system comprises a quenching machine tool, an inductor, a quenching circulating cooling liquid tank, a medium-frequency power supply and a quenching transformer. A locating tool set is installed on the quenching machine tool, the locating tool set can move up and down along a support of the quenching machine tool, the locating tool set is used for locating a work piece, the inductor is connected to the medium-frequency power supply through a quenching transformer, the inductor is further matched with the locating tool set of the quenching machine tool to heat the work piece, the locating tool set is driven by a driving device, the driving device is controlled by a controller, and the quenching circulating cooling liquid tank is arranged on one side of the quenching machine tool. The induction quenching system combines a fixed-point heating method and a scanning heating method to heat repeatedly and circularly, so that the heating temperature of the whole heating face is relatively even, and quenched products can meet the requirements for the depth and the hardness of a hardened layer. Meanwhile, the induction quenching system can achieve the purpose of using small-power-output equipment to process large products and reduces fund investment.
Description
Technical field
The present invention relates to the induction quenching system and method for curved surface part, relate in particular to the induction quenching system and method for a kind of heavy steel-fastening laminated spring from limit base carrying cylindrical surface.
Background technology
Steel plate springs of heavy-duty is exactly a kind of cast blank part from limit base, the square tube that structural shape does not wait as a wall thickness, the plate spring head inserts in its square hole, be pressed on the loading end that wall thickness is the thickest, loading end is on-plane surface, be one along square hole axially, in the middle part in hole projection, place, the aperture, two in hole is low, is the cylindrical surface of arch; It plays the load of the car load distribution of bearing to be come by the transmission of plate spring head, and, when car load jolts vibrations, to bear and exceeding several times of shock loads under static load, three sides of other of square hole are plane, play the effect of restriction plate spring head displacement; Therefore, plate spring needs intensive treatment from the carrying cylindrical surface of limit base.The enhancement method of prior art has carburizing and quenching and two kinds of techniques of induction quenching.Wherein the carburizing quenching process cycle longer, energy consumption is larger; Induction quenching is processed, technique is simple and efficiency is high, but from limit base, be a kind of with the mo(u)lded piece of medium carbon steel manufacture and do not carry out machining due to the heavy truck plate spring, the sensitive surface of such part is quenched, the a solution more difficult problem of getting up is arranged, the tolerance of dimension that is exactly the cast blank part is large, and the tolerance of dimension between especially batch is larger, causes the poor accuracy of part clamping position.Based on this, the general method that adopts the fixed point heating quenching, this than the induction quenching of large curved surface from limit base carrying curved surface for the picture plate spring, not only exist the inhomogeneous of the inhomogeneous case depth caused of heating, the unhardened zone of part even appears.Quality and the work-ing life of this product will seriously be affected.
If this part processed curved surface is adopted to the technology mode of continuous sweep heating, be easy to because the part locating effect is poor, when the workpiece work is advanced to move, the gap that surface to be machined and inductor block occur changes, have influence on the homogeneity of heating and even quenching post-hardening layer depth, even occur that inductor block contacts the phenomenon of sparking electric discharge with surface to be machined, cause the scaling loss of inductor block and workpiece to be machined.
Summary of the invention
Purpose of the present invention is exactly inhomogeneous and the unhardened zone of part occurs from the inhomogeneous case depth caused of limit base carrying cylindrical surface heating in order to solve plate spring that prior art exists, affects product problem in work-ing life; A kind of processing method and relevant equipment, tooling fixture and inductor block, quench cooled system are provided, and realize that the heavy truck plate spring is from its carrying cylindrical surface induction hardened technique of limit base, the case depth that reaches machined surface is even, hardness is qualified.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
Heavily the steel-fastening laminated spring is from the induction quenching system on limit base carrying cylindrical surface, comprise quenching machine, inductor block and quenching circulating cooling liquid pool, on described quenching machine, be equipped with can move up and down along its support and the positioning tool group for workpiece is positioned, described inductor block is connected to intermediate frequency power supply by induction hardening transformer, close with the positioning tool assembly of quenching machine, realize the heating to workpiece; Described positioning tool group is driven by drive unit, and described drive unit has controller to control, and described quenching circulating cooling liquid pool is arranged at a side of quenching machine.
Described positioning tool group comprises self-align frock, pallet and lower positioning pedestal, described self-align frock comprises a horizonal base plate I, described horizonal base plate I is provided with a side plate I perpendicular with it, described side plate I be provided with one parallel with base plate and be fixed on location on side plate and visit arm.
The cross section of described pallet is " U " type, comprises a horizonal base plate II and two perpendicular side plate II; The bolt that is respectively equipped with threaded hole and cooperatively interacts with threaded hole on described two side plate II, described bolt is used for clamping and being positioned at the interior plate spring of its " U " type vallecular cavity from limit base.
Described is a rectangle frame from limit base, and the inboard at described rectangle frame top is the carrying cylindrical surface, and its profile is consistent with the plate spring profile.
Described lower positioning pedestal, comprise three locating surfaces that are perpendicular to one another, will be for Work pallet is positioned; Its underpart is arranged on platen by the method for bolted, and it can be done and move up and down with lathe with platen.
Described inductor block is loop inductor, and described inductor block is equidistant imitated structure with plate spring from limit base carrying cylindrical surface for the coil part of heating, and adds magnetizer in the outside of this part; Simultaneously, it is cooling that the inside of described inductor block is connected with pure water, and described pure water is provided by the circulating cooling system of quenching machine.
The pressure of the pure water in described inductor block is 0.4-0.5Mp, and inflow temperature is not higher than 35 ℃.
The heating power supply of described inductor block is intermediate frequency induction heating power supply ZP100/30, output rating 100kw, specified output frequency 30KHz.
Described quenching circulating cooling liquid pool is on the quenching machine side, and it is for heating the quenching apparatus of rear workpiece, and it is connected with the cooling tower of outside, large liquid bath by circulation line; The coolant temperature that is guaranteeing the former is controlled in 10-40 ℃ of scope of processing requirement.
Described drive unit comprises drive-motor, and described drive-motor drives a belt pulley, and described belt pulley is by leading screw rotation of belt drives, and described leading screw drives platen to move up and down, and described motor is controlled by controller.
Described numerical control quenching machine tool is carrying workpiece and fixture; possess that work is advanced, upper limit position pause timing, return work are advanced, lower position pause timing; repeatedly circular flow; realize that inductor block is to from limit base carrying cylindrical surface fixed point, reciprocating scanning and circulating-heating function repeatedly; simultaneously with work program establishment and memory function; plate spring can be stored after the work program establishment on limit base carrying cylindrical surface; by calling of this program number, press circulating-heating start operation that button can carry out this program, after auto stop prompting.
Described plate spring is middle carbon cast steel or perlite, half pearlitic ductile iron from limit base.
A kind of heavy steel-fastening laminated spring, from the induction hardening method on limit base carrying cylindrical surface, comprises the following steps:
1) at first, the location that plate spring is inserted in to self-align frock from limit base is visited on arm, the carrying cylindrical surface is that machined surface relies on deadweight bonded to each other with the upper locating surface of self-align tool locating spy arm down, and the perimeter alignment of two faces, realized the location in self-align frock from the limit base machined surface.
2) pallet is put on self-align frock, meanwhile its by plate spring in limit base is enclosed within its U-shaped inner chamber, three locating surfaces that are perpendicular to one another on it, three locating surfaces corresponding to self-align frock are close to location, turn fishbolt, turn in process and will keep plate spring motionless from the position of limit base; The program of tightening is that the every relative a pair of screw in fixture both sides is screwed to plate spring simultaneously to be tightened after limit base contacts simultaneously again.One and the location of its machined surface on pallet from limit base and pallet have been realized.
3) will be put on the lower positioning pedestal of vertical quenching machine tool by the pallet from limit base with plate spring, make three locating surfaces of pallet be close to and fit with three limits corresponding on pedestal, realized from the limit base machined surface the accurate location on quenching machine.
4) adjust inductor block, the coil and the plate spring that make it the profiling making carry from limit base the following section that cylindrical surface is equidistant coupling and is positioned at whole carrying cylindrical surface, keep the gap of setting with the carrying cylindrical surface, keep the distance of setting apart from the lower rim that carries cylindrical surface.This position is the zero position of plate spring from limit base carrying cylindrical surface induction heating.
5) press the lathe heating cycle and start button, induction heating starts, carrying cylindrical surface zero position starts to be fixed a point to heat, duration is process set value, then workpiece by lathe with moving down with work speed, the carrying cylindrical surface is scanned heating from the bottom to top, while walking to the end position of carrying cylindrical surface upper limb technique initialization, workpiece stops mobile, transfer the fixed point heating to, duration is identical with zero position, then lathe upwards oppositely moves with workpiece with work speed, workpiece is scanned heating from top to bottom simultaneously, completed a heating cycle while walking to the basifacial starting position of carrying cylinder, through 3-4 circulation, make to carry the surface, cylindrical surface and reach induction heating temperature.
6) workpiece and retinue jig are together inserted rapidly to the hardening liquid weight concentration and be controlled at than the NaCl, the temperature that are 10% in the aqueous solution of 10 ℃ of-40 ℃ of scopes and quench, the time of quenching is 3-5 minute; Carry out self-tempering after quenching.The concentration periodic measurement of hardening liquid, and constantly revise.
Principle of work of the present invention: be no longer machining of mo(u)lded piece from limit base for heavy steel-fastening laminated spring, the induction quenching that it is carried to cylindrical surface is without accurate positioning datum, the method that realization is accurately located from limit base carrying cylindrical surface its spring is, heavily the steel-fastening laminated spring is from the induction hardened machined surface of limit base-its carrying cylindrical surface and the laminating of self-align tool positioning surface, the surrounding alignment, realized having set up fixing position relationship between the positioning datum of limit base machined surface and self-align frock, given from the limit base cylindrical surface positioning datum accurately; Be installed at the retinue jig on self-align frock, mutual can being positioned in the mode that locating surface is close to mutually separately, on the retinue jig, bolt is arranged, be used for clamping and fix from limit base, the two composition molectron that is connected, and by the positioning relation of self-align tool equipment transmission, formed definite positioning relation between limit base machined surface and pallet, its positioning reference plane has accurately been arranged on pallet; This is that a kind of to take self machined surface be positioning datum, and link into an integrated entity with the frock be located, to the location of its machined surface be transformed into as the method on the frock of its location, thereby realize the purpose of location grafting on its retinue jig to the workpiece machined surface.Next step, workpiece with pallet, locating surface with it on pallet and lower positioning pedestal locating surface are installed on lower positioning pedestal with the locator means mutually be close to, and the latter is fixed on quenching machine, has so established the positioning relation between limit base machined surface and lathe.So far completed from the limit base machined surface the accurate location on quenching machine.
The mode that induction heating takes fixed point and scanning heating and reciprocation cycle heating to combine, the scanning heating is for heating middle part, carrying cylindrical surface, and heat the limit section of carrying cylindrical surface with the fixed point type of heating, this is because plate spring is the square pore structure from limit base, the position of fixed point heating is positioned at carrying limit, cylindrical surface section and approaches square hole inside corner place, heat not only heats carrying limit, cylindrical surface section, inside edges and corners also simultaneously, and even adjacent the other side conduction, the heat demand amount will be higher than middle part, for whole carrying heat that cylindrical surface is obtained is approached, Heating temperature approaches, therefore, the limit section on carrying cylindrical surface adopts the fixed point heating, fixed point by the fixed point heating to carrying one side, cylindrical surface, middle part scanning heating, the other side heats, the middle part reverse scan is heated, got back to initial line completes heating cycle one time, so circulating-heating several times, makes whole carrying cylindrical surface reach the processing requirement Heating temperature, part and retinue jig are together inserted in cooling fluid and quenched rapidly, carry out self-tempering after quenching.
Beneficial effect of the present invention:
1) by self-align frock, positioning pedestal under pallet and lathe, realize that plate spring carries the accurate location of cylindrical surface at quenching machine from limit base, ensured relative position between inductor block and machined surface accurately, avoided adopting the poor accuracy of position degree between inductor block that the non-machined surface of cast blank part location brings and machined surface, affect the homogeneity of machined surface induction heating, cause occurring the problem in the unhardened zone of part, eliminate the inductor block coil and contacted the sparking electric discharge with surface to be machined, cause inductor block that the phenomenon with the workpiece to be machined scaling loss is arranged, accurate location and the homogeneous heating of machined surface have been realized.
2) workpiece is in conjunction with fixed point with scan two kinds of type of heating, and repeatedly comes and goes circulating-heating, and the Heating temperature of whole hot face is relatively even, reaches case depth, the hardness of product requirement after quenching; Also realized the larger product of employing smaller power output equipment processing, reduced the fund input of equipment simultaneously.
The accompanying drawing explanation
Fig. 1 is the structural front view of cast steel slab spring of the present invention from limit base;
The right view that Fig. 2 is Fig. 1;
Fig. 3 is the structure diagram of cast steel slab spring of the present invention from its self locating device of limit base;
The right view that Fig. 4 is Fig. 3;
Be fixed by bolts to the lower positioning pedestal on platen in Fig. 5 the present invention;
Fig. 6 is part-structure vertical view of the present invention;
Fig. 7 one-piece construction figure of the present invention;
In figure: 1 plate spring is from limit base, 2 carrying Cylinder Surfaces, 3 bolts, 4 retinue jigs, 5 retinue jig and the mutual locating surfaces of self-align frock, 6 self-align tool locating are visited arm, " L " type body of 7 self-align frock side direction, 8 retinue jig and the mutual locating surface I of self-align frock, 9 retinue jig and the mutual locating surface II of self-align frock, 10 times positioning pedestals, 11 inductor block cylinder manifolds, 12 inductor block heating collars, 13 magnetizers, the mutual locating surface I of horizontal direction between 20 pallets and lower positioning pedestal, the mutual locating surface II of horizontal direction between 21 pallets and lower positioning pedestal, 30 self-powered platforms, 31 bodies, 32 axis of guides, 33 drive leading screw, 34 belts, pulley drive system, 35 stepper motors.
Embodiment
Below in conjunction with accompanying drawing, invention is elaborated:
Be the structure iron of plate spring from limit base 1 as shown in Figure 1 and Figure 2, wherein plate spring, from its carrying Cylinder Surface 2 of limit base, is the induction quenching machined surface.Described is a rectangle frame from limit base, and the inboard at described rectangle frame top is the carrying cylindrical surface, and its profile is consistent with the plate spring profile.
As shown in Figure 3, Figure 4, the cast steel slab spring is from the structure diagram of its self locating device of limit base, comprise a horizonal base plate I, described horizonal base plate I is provided with a side plate I perpendicular with it, described side plate I be provided with one parallel with base plate and be fixed on location on side plate and visit arm.Retinue each a pair of clamping of jig 4 both sides, fishbolt 3, it is for the fixation steel plate spring from limit base, and retinue jig 4 is " U " type; And retinue jig and the mutual locating surface 5 of self-align frock are as shown in the figure; Self-align tool locating is visited arm 6, above it with plate spring from its carrying Cylinder Surface phase profiling of limit base, and location bonded to each other with it, " L " type body 7 of self-align frock side direction.Retinue jig and the mutual locating surface I8 of self-align frock and retinue jig and the mutual locating surface II9 of self-align frock, realized that plate spring is from its carrying Cylinder Surface accurate location on retinue jig 4 of limit base.
Be illustrated in figure 5 the structure iron of lower positioning pedestal 10, comprise three locating surfaces that are perpendicular to one another, will be for Work pallet be positioned; Its underpart is arranged on platen by the method for bolted, and it can be done and move up and down with lathe with platen.
Fig. 6 is that in the present invention, inductor block comprises magnetizer 13 on inductor block, inductor block cylinder manifold 11, inductor block heating collar 12 and inductor block heating collar, inductor block is loop inductor, described inductor block is equidistant imitated structure for effective heating collar 12 parts and the plate spring of heating from limit base carrying cylindrical surface, and adds magnetizer 13 in the outside of this part; Simultaneously, it is cooling that the inside of described inductor block is connected with pure water, and described pure water is provided by the circulating cooling system of quenching machine.The pressure of the pure water in inductor block is 0.4-0.5Mp, and inflow temperature is not higher than 35 ℃.The heating power supply of inductor block is intermediate frequency induction heating power supply ZP100/30, output rating 100kw, specified output frequency 30KHz.With vertical numerical control quenching machine GCT-10120, maximum processing work length is 1200mm, and the maximum rotating diameter of processing work is 600mm.And between pallet and lower positioning pedestal, between the mutual locating surface I20 of horizontal direction, pallet and lower positioning pedestal, the mutual locating surface II21 of horizontal direction is as shown in Figure 6.
The quenching machine of Fig. 7 comprises self-powered platform 30, and lower positioning pedestal adopts the screw-clamped mode to be mounted thereon; Quenching machine bed body 31; Worktable moves up and down along the axis of guide 32; Drive leading screw 33, its rotation can drive self-powered platform and workpiece is done up and down and moved along the arrow direction, belt, pulley drive system 34, stepper motor 35; Described stepper motor 35 drives a belt, pulley drive system 34, described belt pulley is by 33 rotations of driving leading screw of belt drives, described driving leading screw 33 drives platen to move up and down, and described stepper motor 35 is controlled by controller.
Heavily the steel-fastening laminated spring, from the induction hardening method on limit base carrying cylindrical surface, comprises the following steps.
At first heavily the steel-fastening laminated spring is fitted according to the position relationship in Fig. 2 and self-align tool positioning surface from the induction hardened machined surface of limit base-its carrying Cylinder Surface, the surrounding alignment, realized having set up definite position relationship between the positioning datum of limit base machined surface and self-align frock;
Second step installs the retinue jig additional on self-align frock, according to the position relationship in Fig. 2, retinue jig 3 and self-align frock 1 are all had to three orthogonal planes as mutual locating surface laminating on three-dimensional space, realized the retinue location of jig on self-align frock;
The 3rd step is tightened four standing bolts 2, notices that the program of tightening is, the every relative pair of bolts in fixture both sides is screwed to plate spring simultaneously tightens after limit base 2 contacts simultaneously again, must guarantee that rundown process light plate spring is motionless from the position of limit base.Realized the accurate location of laminated spring on the limit base Cylinder Surface is being accompanied jig 3;
The 4th step is according to the position relationship in Fig. 4, workpiece 2 with pallet, the locating surface of the locating surface with it on pallet 3 and the lower positioning pedestal first half 4 is installed on lower positioning pedestal with the locator means mutually be close to, the latter is fixed on the quenching machine worktable by bolt, so established between limit base machined surface and lathe and determined and unified spatial relation, so far completed from the limit base machined surface the accurate location on quenching machine;
The 5th step is according to the position relationship in Fig. 4, adjust inductor block 5 and be positioned at plate spring from the bent relative initial processing position of limit base 2 its carrying, make the inductor block coil be positioned at the bottom on whole carrying cylindrical surface and become couple state with the carrying cylindrical surface, the gap that keeps 2mm, the side adjacent with carrying bottom, cylindrical surface keeps the distance of 1mm.
The 6th step is to press the lathe heating cycle to start button, now, induction heating starts, the intermediate frequency power supply output rating is 50-80kwh, carrying bottom, the cylindrical surface zero position relative with inductor block fixed a point to heat the 3s time, then workpiece by lathe with advancing with the downward work of 5-6mm/s speed, the carrying cylindrical surface is heated by scanning from the bottom to top, walk to the carrying cylindrical surface topmost, with the carrying adjacent side 1mm in top, cylindrical surface apart from the time work advance to stop, the fixed point heating 3s time, then lathe upwards carries out the opposite direction work with 5-6mm/s speed again with workpiece and advances, be scanned heated parts simultaneously, completed a heating cycle while walking to the basifacial starting position of carrying cylinder, so 3-4 circulation, when lathe and workpiece are got back to zero position, heating stops, and now cylindrical surface reaches induction heating temperature 860-900 ℃.With work program establishment and memory function, plate spring can be stored after the circular process establishment of limit base in numerically-controlled machine, call by program number, press heating cycle and start button and can carry out the operation of this program number.Plate spring of the present invention from limit base 2 for in carbon cast steel ZG270-500(GB/11352-2009) the cast sheet spring manufactured is from limit base.
The 7th step is part and retinue jig together to be inserted to weight concentration rapidly be controlled in the aqueous solution of 10 ℃ of-40 ℃ of scopes the 3min that quenches than the NaCl, the temperature that are 10%, carries out self-tempering after quenching.Through checking its metallographic martensitic stucture rank, be that 3-7 level, case depth are 1-4mm and surface hardness >=HRC47.Reach the product drawing requirement.
Although above-mentioned, by reference to the accompanying drawings the embodiment of inventing is described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (9)
1. heavily the steel-fastening laminated spring carries the induction quenching system on cylindrical surface from limit base, it is characterized in that: comprise quenching machine, inductor block and quenching circulating cooling liquid pool, on described quenching machine, be equipped with can move up and down along its support and the positioning tool group for workpiece is positioned, described inductor block is connected to intermediate frequency power supply by induction hardening transformer, close with the positioning tool assembly of quenching machine, realize the heating to workpiece; Described positioning tool group is driven by drive unit, and described drive unit has controller to control, and described quenching circulating cooling liquid pool is arranged at a side of quenching machine.
2. quench systems as claimed in claim 1, it is characterized in that: described positioning tool group comprises self-align frock, pallet and the lower positioning pedestal cooperatively interacted;
Described self-align frock comprises a horizonal base plate I, and described horizonal base plate is provided with a side plate I perpendicular with it, described side plate I be provided with one parallel with base plate I and be fixed on location on side plate I and visit arm;
The cross section of described pallet is " U " type, comprises a horizonal base plate II and two perpendicular side plate II; The bolt that is respectively equipped with threaded hole and cooperatively interacts with threaded hole on described two side plate II, described bolt is used for clamping and being positioned at the interior plate spring of its " U " type vallecular cavity from limit base;
Described is a rectangle frame from limit base, and the inboard at described rectangle frame top is the carrying cylindrical surface, and its profile is consistent with the plate spring profile; And be middle carbon cast steel or perlite, half pearlitic ductile iron from the material of limit base;
Described lower positioning pedestal, comprise three locating surfaces that are perpendicular to one another, will be for Work pallet is positioned; Its underpart is arranged on platen by the method for bolted, and itself and platen are done and moved up and down with lathe.
3. quench systems as claimed in claim 1, it is characterized in that: described inductor block is loop inductor, described inductor block is equidistant imitated structure with plate spring from limit base carrying cylindrical surface for the coil part of heating, and adds magnetizer in the outside of this part; Simultaneously, it is cooling that the inside of described inductor block is connected with pure water, and described pure water is provided by the circulating cooling system of quenching machine; The pressure of the pure water in described inductor block is 0.4-0.5Mp, and inflow temperature is not higher than 35 ℃.
4. quench systems as claimed in claim 1, it is characterized in that: the heating power supply of described inductor block is intermediate frequency induction heating power supply ZP100/30, output rating 100kw, specified output frequency 30KHz.
5. quench systems as claimed in claim 1 is characterized in that: described quenching circulating cooling liquid pool is on the quenching machine side, and it is connected with the cooling tower of outside, large liquid bath by circulation line; The coolant temperature that is guaranteeing the former is controlled in 10-40 ℃ of scope of processing requirement.
6. quench systems as claimed in claim 1, it is characterized in that: described drive unit comprises drive-motor, described drive-motor drives a belt pulley, described belt pulley is by leading screw rotation of belt drives, described leading screw drives platen to move up and down, and described motor is controlled by controller.
One kind heavily the steel-fastening laminated spring from the induction hardening method on limit base carrying cylindrical surface, it is characterized in that, comprise the following steps:
1) at first, the location that plate spring is inserted in to self-align frock from limit base is visited on arm, the carrying cylindrical surface is that machined surface relies on deadweight bonded to each other with the upper locating surface of self-align tool locating spy arm down, and the perimeter alignment of two faces, realized the location in self-align frock from the limit base machined surface;
2) pallet is put on self-align frock, three locating surfaces and the plate spring that on it, are perpendicular to one another are close to location from corresponding three locating surfaces of limit base, turn fishbolt, turn in process and will keep plate spring motionless from the position of limit base;
3) will be put on the lower positioning pedestal of vertical quenching machine tool by the pallet from limit base with plate spring, make three locating surfaces of pallet be close to and fit with three limits corresponding on pedestal, realized from the limit base machined surface the accurate location on quenching machine;
4) adjust inductor block, the coil and the plate spring that make it the profiling making carry from limit base the following section that cylindrical surface is equidistant coupling and is positioned at whole carrying cylindrical surface, keep the gap of setting with the carrying cylindrical surface, keep the distance of setting apart from the lower rim that carries cylindrical surface; This position is the zero position of plate spring from limit base carrying cylindrical surface induction heating;
5) heating cycle of pressing quenching machine starts button, and induction heating starts;
6) after having heated, workpiece and retinue jig are together inserted to the hardening liquid weight concentration rapidly and be controlled at than the NaCl, the temperature that are 10% in the aqueous solution of 10 ℃ of-40 ℃ of scopes and quench, carry out self-tempering after quenching; And the concentration periodic measurement of hardening liquid, and constantly revise.
8. quenching method as claimed in claim 7, is characterized in that, described step 2) the program of tightening be that the every relative a pair of screw in fixture both sides is screwed to plate spring simultaneously and tightens after limit base contacts simultaneously again; One and the location of its machined surface on pallet from limit base and pallet have been realized.
9. quenching method as claimed in claim 7, is characterized in that, the heating detailed process of described step 5) is as follows:
Carrying cylindrical surface zero position starts to be fixed a point to heat, duration is process set value, then workpiece by lathe with moving down with work speed, the carrying cylindrical surface is scanned heating from the bottom to top, while walking to the end position of carrying cylindrical surface upper limb technique initialization, workpiece stops mobile, transfer the fixed point heating to, duration is identical with zero position, then lathe upwards oppositely moves with workpiece with work speed, workpiece is scanned heating from top to bottom simultaneously, has completed a heating cycle while walking to the basifacial starting position of carrying cylinder; Through 3-4 circulation, make to carry the surface, cylindrical surface and reach induction heating temperature.
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| CN201310403948.7A CN103421934B (en) | 2013-09-06 | 2013-09-06 | Induction quenching system and method for bearing cylindrical face of self-limiting seat of heavy truck plate spring |
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| CN106811582A (en) * | 2015-11-30 | 2017-06-09 | 池州学院 | A kind of thrust wheel quenching support meanss |
| CN108613574A (en) * | 2016-06-01 | 2018-10-02 | 罗金山 | A kind of industrial production heat sink |
| CN108893577A (en) * | 2018-08-16 | 2018-11-27 | 江苏万达特种轴承有限公司 | The tooling and processing method of mid-frequency induction hardening |
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| CN111778383A (en) * | 2020-07-30 | 2020-10-16 | 国营山西锻造厂 | Surface quenching method for end of scraper |
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