CN103421934B - 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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- CN103421934B CN103421934B CN201310403948.7A CN201310403948A CN103421934B CN 103421934 B CN103421934 B CN 103421934B CN 201310403948 A CN201310403948 A CN 201310403948A CN 103421934 B CN103421934 B CN 103421934B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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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, 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, aperture, two place 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, in the time that 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 processing, technique is simple and efficiency is high, but because heavy truck plate spring is a kind of with the mo(u)lded piece of medium carbon steel manufacture and do not carry out machining from limit base, the sensitive surface of such part is quenched, there is a solution more difficult problem of getting up, the tolerance of dimension that is exactly 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 fixed point heating quenching, this compared with the induction quenching of large curved surface from limit base carrying curved surface for picture plate spring, not only exist the inhomogeneous of the inhomogeneous case depth causing of heating, even there is the unhardened region of part.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 part locating effect is poor, in the time that workpiece work is entered to move, the gap that occurs surface to be machined and inductor block 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
Object of the present invention is exactly inhomogeneous and occur the unhardened region of part from the limit base carrying cylindrical surface inhomogeneous case depth causing of 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 heavy truck plate spring 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 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, positioning tool group that can move up and down along its support and for workpiece is positioned is installed on described quenching machine, 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 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, and described side plate I is provided with a location parallel with base plate and that be fixed on side plate and visits 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 two described side plate II, described bolt is used for clamping and be positioned at plate spring in its " U " type vallecular cavity from limit base.
Described is a rectangle frame from limit base, and the inner side at described rectangle frame top is carrying cylindrical surface, and its profile is consistent with plate spring profile.
Described lower positioning pedestal, comprises three locating surfaces that are perpendicular to one another, and will be used for Work pallet to position; Its underpart is arranged on platen by the method for bolted, and it can move up and down with lathe with platen.
Described inductor block is loop inductor, and described inductor block is equidistant imitated structure for the coil part and the plate spring that heat from limit base carrying cylindrical surface, and adds magnetizer in the outside of this part; Meanwhile, 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 DEG C.
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 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 ensureing the former is controlled within the scope of 10-40 DEG C 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 by controller control.
Described numerical control quenching machine tool is carrying workpiece and fixture; possess that work is entered, upper limit position pause timing, return work are entered, lower position pause timing; repeatedly circular flow; realize inductor block 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.
Heavy steel-fastening laminated spring, from the induction hardening method on limit base carrying cylindrical surface, comprises the following steps:
1) first, the location that plate spring is inserted in to self-align frock from limit base is visited on arm, 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, has realized the location in self-align frock from limit base machined surface.
2) pallet is put in self-align frock, meanwhile its by plate spring in limit base is enclosed within its U-shaped inner chamber, three locating surfaces, three locating surfaces corresponding to self-align frock that are perpendicular to one another on it 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 are realized.
3) will be put into from the pallet of limit base on the lower positioning pedestal of vertical quenching machine tool with plate spring, make three locating surfaces of pallet be close to and fit with three limits corresponding on pedestal, realized the accurate location on quenching machine from limit base machined surface.
4) adjust inductor block, the coil and the plate spring that make it profiling making carry from limit base the following portion that cylindrical surface is equidistant coupling and is positioned at whole carrying cylindrical surface, keep the gap of setting, keep apart from the lower rim that carries cylindrical surface the distance of setting with carrying cylindrical surface.This position is the zero position of plate spring from limit base carrying cylindrical surface induction heating.
5) press 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, 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 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, while walking to the basifacial starting position of carrying cylinder, complete a heating cycle, through 3-4 circulation, make to carry surface, cylindrical surface and reach induction heating temperature.
6) workpiece and retinue jig are together inserted rapidly to hardening liquid weight concentration and be controlled at than the NaCl, the temperature that are 10% in the aqueous solution of 10 DEG C of-40 DEG C of scopes and quench, the time of quenching is 3-5 minute; After quenching, carry out self-tempering.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, realizing the method that its spring is accurately located from limit base carrying cylindrical surface is, heavily 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, surrounding alignment, realize and between the positioning datum of limit base machined surface and self-align frock, set up fixing position relationship, given from limit base cylindrical surface positioning datum accurately; Be installed at the retinue jig in self-align frock, mutual can being positioned in the mode that locating surface is close to mutually separately, on retinue jig, there is bolt, 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, from between limit base machined surface and pallet, form definite positioning relation, on pallet, had its positioning reference plane accurately; This is a kind of taking self machined surface as positioning datum, and link into an integrated entity with the frock being located, by the location to its machined surface, be transformed into as the method on the frock of its location, thereby realized the object on its retinue jig to the location grafting of workpiece machined surface.Next step, with the workpiece of pallet, locating surface with it on pallet and lower positioning pedestal locating surface are installed on lower positioning pedestal with the locator means being mutually 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 the accurate location on quenching machine from limit base machined surface.
Induction heating takes fixed point and scanning heating and reciprocation cycle to heat the mode combining, scanning heating is used for heating middle part, carrying cylindrical surface, and with the limit portion on fixed point type of heating heating carrying cylindrical surface, this is because plate spring is square pore structure from limit base, the position of fixed point heating is positioned at carrying limit, cylindrical surface portion and approaches square hole inside corner place, heat not only heats carrying limit, cylindrical surface portion, inside edges and corners also simultaneously, and even adjacent the other side conduction, 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 portion on carrying cylindrical surface adopts fixed point heating, fixed point by the fixed point heating to carrying one side, cylindrical surface, middle part scanning heating, the other side heats, 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 processing requirement Heating temperature, part and retinue jig are together inserted in cooling fluid and quenched rapidly, after quenching, carry out self-tempering.
Beneficial effect of the present invention:
1) by self-align frock, positioning pedestal under pallet and lathe, realize plate spring and carry the accurate location of cylindrical surface at quenching machine from limit base, ensured relative position between inductor block and machined surface accurately, the poor accuracy of position degree between the inductor block of having avoided adopting the non-machined surface of cast blank part to locate and bringing and machined surface, affect the homogeneity of machined surface induction heating, cause occurring the problem in the unhardened region of part, eliminate inductor block coil and contacted sparking electric discharge with surface to be machined, cause inductor block to have and the phenomenon of workpiece to be machined scaling loss, accurate location and the homogeneous heating of machined surface are realized.
2) workpiece in conjunction with fixed point and scanning two kinds of type of heating, and repeatedly come and go circulating-heating, 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.
Brief description of the drawings
Fig. 1 is the structural front view of cast steel slab spring of the present invention from limit base;
Fig. 2 is the right view of 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;
Fig. 4 is the right view of Fig. 3;
In Fig. 5 the present invention, be fixed by bolts to the lower positioning pedestal on platen;
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 induction quenching machined surface.Described is a rectangle frame from limit base, and the inner side at described rectangle frame top is carrying cylindrical surface, and its profile is consistent with plate spring profile.
As shown in Figure 3, Figure 4, 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, and described side plate I is provided with a location parallel with base plate and that be fixed on side plate and visits arm.Retinue jig 4 each a pair of clampings in both sides, fishbolt 3, it is for 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 plate spring 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 used for Work pallet to position; Its underpart is arranged on platen by the method for bolted, and it can 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 that heat from limit base carrying cylindrical surface, and adds magnetizer 13 in the outside of this part; Meanwhile, 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 DEG C.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 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 to do up and down and move along arrow direction, belt, pulley drive system 34, stepper motor 35; Described stepper motor 35 drives a belt, pulley drive system 34, described belt pulley rotates by driving leading screw 33 of belt drives, described driving leading screw 33 drives platen to move up and down, and described stepper motor 35 is by controller control.
Heavily steel-fastening laminated spring, from the induction hardening method on limit base carrying cylindrical surface, comprises the following steps.
First heavily 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, surrounding alignment, has realized and between the positioning datum of limit base machined surface and self-align frock, has set up definite position relationship;
Second step installs retinue jig additional in 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 location of retinue jig in 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 ensure that rundown process light plate spring is motionless from the position of limit base.Realize the accurate location that laminated spring is being accompanied on jig 3 from limit base Cylinder Surface;
The 4th step is according to the position relationship in Fig. 4, with the workpiece 2 of 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 being mutually close to, the latter is fixed on quenching machine worktable by bolt, so establish between limit base machined surface and lathe and determined and unified spatial relation, so far completed the accurate location on quenching machine from limit base machined surface;
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 inductor block coil be positioned at the bottom on whole carrying cylindrical surface and become couple state with carrying cylindrical surface, keep the gap of 2mm, the side adjacent with carrying bottom, cylindrical surface keeps the distance of 1mm.
The 6th step is to press lathe heating cycle to start button, now, induction heating starts, 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 entering with the downward work of 5-6mm/s speed, carrying cylindrical surface is heated by scanning from the bottom to top, walk to carrying cylindrical surface topmost, during with the distance of the carrying adjacent side 1mm in top, cylindrical surface, work is entered to stop, the fixed point heating 3s time, then lathe upwards carries out opposite direction work with 5-6mm/s speed again with workpiece and enters, be scanned heated parts simultaneously, while walking to the basifacial starting position of carrying cylinder, complete a heating cycle, 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 DEG C.In numerically-controlled machine, with work program establishment and memory function, plate spring can be stored after the circular process establishment of limit base, 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 be rapidly controlled at the 3min that quenches in the aqueous solution of 10 DEG C of-40 DEG C of scopes than the NaCl, the temperature that are 10%, carries out self-tempering after quenching.Be that 3-7 level, case depth are 1-4mm and surface hardness >=HRC47 through checking its metallographic martensitic stucture rank.Reach product drawing requirement.
By reference to the accompanying drawings the embodiment of invention is described although above-mentioned; but 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 amendments that creative work can make or distortion still in protection scope of the present invention.
Claims (8)
- Heavily steel-fastening laminated spring from the induction quenching system on limit base carrying cylindrical surface, it is characterized in that: comprise quenching machine, inductor block and quenching circulating cooling liquid pool, positioning tool group that can move up and down along its support and for workpiece is positioned is installed on described quenching machine, 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 control, and described quenching circulating cooling liquid pool is arranged at a side of quenching machine;Described positioning tool group comprises the self-align frock, pallet and the lower positioning pedestal that cooperatively interact;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, and described side plate I is provided with a location parallel with base plate I and that be fixed on side plate I and visits 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 two described side plate II, described bolt is used for clamping and be positioned at plate spring in its " U " type vallecular cavity from limit base;Described is a rectangle frame from limit base, and the inner side at described rectangle frame top is carrying cylindrical surface, and its profile is consistent with 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, comprises three locating surfaces that are perpendicular to one another, and will be used for Work pallet to position; Its underpart is arranged on platen by the method for bolted, and itself and platen move up and down with lathe.
- 2. 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 for the coil part and the plate spring that heat from limit base carrying cylindrical surface, and adds magnetizer in the outside of this part; Meanwhile, 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 0.4-0.5MPa, and inflow temperature is not higher than 35 DEG C.
- 3. quench systems as claimed in claim 1, 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.
- 4. quench systems as claimed in claim 1, is characterized in that: described quenching circulating cooling liquid pool is on quenching machine side, and it is connected with the cooling tower of outside, large liquid bath by circulation line; The coolant temperature that is ensureing the former is controlled within the scope of 10-40 DEG C of processing requirement.
- 5. 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 by controller control.
- 6. heavily steel-fastening laminated spring, from the induction hardening method on limit base carrying cylindrical surface, is characterized in that, comprises the following steps:1) first, the location that plate spring is inserted in to self-align frock from limit base is visited on arm, 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, the perimeter alignment of two faces, has realized the location in self-align frock from limit base machined surface;2) pallet is put in 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 into from the pallet of limit base on the lower positioning pedestal of vertical quenching machine tool with plate spring, make three locating surfaces of pallet be close to and fit with three limits corresponding on pedestal, realized the accurate location on quenching machine from limit base machined surface;4) adjust inductor block, the coil and the plate spring that make it profiling making carry from limit base the following portion that cylindrical surface is equidistant coupling and is positioned at whole carrying cylindrical surface, keep the gap of setting, keep apart from the lower rim that carries cylindrical surface the distance of setting with carrying 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 pallet are together inserted to hardening liquid weight concentration rapidly and be controlled at than the NaCl, the temperature that are 10% in the aqueous solution of 10 DEG C of-40 DEG C of scopes and quench, after quenching, carry out self-tempering; And the concentration periodic measurement of hardening liquid, and constantly revise.
- 7. quenching method as claimed in claim 6, is characterized in that, described step 2) the process that turns fishbolt be: 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 are realized.
- 8. quenching method as claimed in claim 6, it is characterized in that, described step 5) heating detailed process as follows: the heating that starts to be fixed a point of carrying cylindrical surface zero position, duration is process set value, then workpiece by lathe with moving down with work speed, 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 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, while walking to the basifacial starting position of carrying cylinder, complete a heating cycle, through 3-4 circulation, make to carry 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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| CN105420463B (en) * | 2015-12-23 | 2017-05-31 | 重庆大江工业有限责任公司 | A kind of heavy-duty car spring end saddle inner chamber medium frequency induction hardening process and positioning fixture |
| CN108759539A (en) * | 2016-06-01 | 2018-11-06 | 罗金山 | A kind of industrial production heat sink |
| CN106367564B (en) * | 2016-09-22 | 2017-12-22 | 中车大连机车车辆有限公司 | Spring leaf one side medium frequency induction hardening process and its inductor |
| CN108893577B (en) * | 2018-08-16 | 2023-06-30 | 江苏万达特种轴承股份有限公司 | Intermediate frequency induction quenching tool and processing method |
| 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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| GB864048A (en) * | 1956-06-21 | 1961-03-29 | Delapena & Son Ltd | A method and means for hardening a surface of an article by electrical induction heating and quenching |
| US5702667A (en) * | 1996-08-16 | 1997-12-30 | Caterpillar Inc. | Method and apparatus for heat treating a bushing |
| CN201501909U (en) * | 2009-06-10 | 2010-06-09 | 十堰天舒机电科技有限公司 | Vertical quenching machine tool |
| CN101948943A (en) * | 2010-11-02 | 2011-01-19 | 湘电集团有限公司 | Mold surface quenching device and method |
| CN102366898B (en) * | 2011-09-22 | 2013-08-21 | 哈尔滨汽轮机厂有限责任公司 | Eccentric positioning tooling device for expansion groove |
| CN102366901B (en) * | 2011-11-02 | 2013-03-27 | 山东常林机械集团股份有限公司 | Semi-circular arc turning tool for swash plate bracket |
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2013
- 2013-09-06 CN CN201310403948.7A patent/CN103421934B/en not_active Expired - Fee Related
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