CN102181611B - Induction quenching method for crawler belt plate of crawler crane and device - Google Patents
Induction quenching method for crawler belt plate of crawler crane and device Download PDFInfo
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- CN102181611B CN102181611B CN201110095556XA CN201110095556A CN102181611B CN 102181611 B CN102181611 B CN 102181611B CN 201110095556X A CN201110095556X A CN 201110095556XA CN 201110095556 A CN201110095556 A CN 201110095556A CN 102181611 B CN102181611 B CN 102181611B
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Abstract
The invention provides an induction quenching method for a crawler belt plate of a crawler crane. The method comprises the following steps of: performing surface quenching treatment on a gearing face of the crawler belt plate by using a first induction heating device; and performing surface quenching treatment on bearing faces and guide faces of the crawler belt plate by using a second induction heating device, wherein the crawler belt plate comprises a bottom plate, the gearing face, and two bearing faces and two guide faces which are contacted with a supporting wheel and a guide wheel respectively, the first induction heating device comprises a first induction heating coil for heating the gearing face, and the second induction heating device comprises a second induction heating coil for heating the two guide faces and the two bearing faces. Compared with the prior art, the method has the advantages of performing surface quenching treatment on the gearing face, the guide faces and the bearing faces which are high abrasion parts of the crawler belt plate. By the method, effective quenching treatment can be performed on the gearing face, the bearing faces and the guide faces, and hardening layers which meet the requirements are formed on the gearing face, the bearing faces and the guide faces.
Description
Technical field
The present invention relates to the metal heat treatmet field, be specifically related to a kind of induction hardening method and device of track board of crawling crane.
Background technology
Crawler mounted crane is modern project and one of indispensable main equipment of construction construction.Creeper undercarriage is the important process unit of crawler mounted crane, is made up of driving wheel, guide deflection sheave, thrust wheel, upper track wheel, grip-pad and track frame.The principle of work of creeper undercarriage is that rating of engine passes to driving wheel through retarding mechanism, through engagement grip-pad on it tractive force is passed to the bottom surface again, drives car load by the bottom surface reactive force and advances.
Grip-pad is one of main load bearing component of crawler mounted crane, and during lifting machine work, grip-pad also will bear the reactive force and because the additional stress that Uneven road causes etc. on ground except that the weight of weight of bearing car load self and lifting material.In addition, in the process of lifting machine walking, all will cause the gross distortion and the wearing and tearing of grip-pad when being in contact with one another between the component of creeper undercarriage, even early fracture will take place with relative movement.
The structure of grip-pad comprises base plate, is respectively arranged with the side gusset in the both sides of said base plate, is useful on the coupling sleeve that is connected with other base plate in the arranged outside of said side gusset; Be provided with the gear block with the driving wheel engagement of lifting machine at the middle part of said base plate, be respectively arranged with guide deflection sheave and contacted two spigot surfaces of thrust wheel and the supporting surface that is used for lifting machine in the outside at the two ends of said gear block.For little tonnage and large-tonnage crawler mounted crane, the shape of spigot surface and mating surface is slightly different, but principle of work is basic identical.Result of study shows that in the above-mentioned parts of grip-pad, gear block, spigot surface and supporting surface are the most serious parts of taking up wear on the grip-pad, and the degree of wear of above-mentioned parts is determining the work-ing life of grip-pad.
In the prior art,, make it have good obdurability, wear resistance and enough bearing capacities, generally adopt flame-hardened heat treatment mode to be quenched in the surface of grip-pad in order to improve the use properties of grip-pad.Compare with other heat treatment mode, the flame quenching production cost is lower, is convenient to operation, implements easily, still but is not easy to guarantee the homogeneity of quenching hardness and quench-hardened case thickness.And; Flame quenching generally is to be quenched in the whole surface of grip-pad; But because the degree of wear that the different parts of grip-pad bear when work and inconsistent; Especially mating surface, spigot surface and supporting surface are high abrading sections, and adopt flame-hardened mode can not make the surface of mating surface, spigot surface and supporting surface form satisfactory quench-hardened case.
Summary of the invention
The problem that the present invention will solve is to provide a kind of induction hardening method of grip-pad of crawler mounted crane; Compared with prior art; Said induction hardening method can carry out quench treatment to the high abrading section of grip-pad, forms satisfactory quench-hardened case in the high abrading section of grip-pad.
In order to solve above technical problem, the present invention provides a kind of induction hardening method of grip-pad of crawler mounted crane, comprising:
Use first induction heating device that the mating surface of grip-pad is carried out the hard surfacing processing, use second induction heating device that the spigot surface and the supporting surface of grip-pad are carried out the hard surfacing processing;
Said grip-pad comprises base plate, be arranged on the said base plate mating surface middle part, that be meshed with driving wheel, be arranged on the said base plate, respectively with guide deflection sheave and contacted two spigot surfaces of supporting-point roller and supporting surface;
Said first induction heating device comprises first load coil that said mating surface is heated, and said second induction heating device comprises second load coil that said two spigot surfaces and supporting surface are heated.
Preferably, said use first induction heating device carries out hard surfacing to the mating surface of grip-pad and handles and be specially:
Moving said first ruhmkorff coil along the direction that axially parallels with said driving wheel heats the surface of said mating surface;
The gap of said mating surface and said first ruhmkorff coil is 2～6mm;
The surface of the said mating surface of spray cooling.
The spray direction of the heat-eliminating medium when preferably, said spray cools off said mating surface be 30 °～60 ° by the spray face angulation.
Preferably, said first ruhmkorff coil comprises and corresponding to first active coil of the cross section profile shape of said mating surface that said first active coil is processed for the orthogonal copper pipe by cross-sectional shape.
Preferably, on said first active coil, be processed with a plurality of spiracles, said heat-eliminating medium sprays from said spiracle.
Preferably, said second induction heating device carries out hard surfacing to the spigot surface of said grip-pad and supporting surface and handles and be specially:
Heat to said two spigot surfaces and with the surface of bearing surface along moving said second ruhmkorff coil to perpendicular direction perpendicular to said live axle;
The gap of said spigot surface and supporting surface and said second ruhmkorff coil is 2～6mm;
The surface of spray said two spigot surfaces of cooling and supporting surface.
The spray direction of the heat-eliminating medium when preferably, said spray cools off said spigot surface and supporting surface be 30 °～60 ° by the spray face angulation.
Preferably, said second ruhmkorff coil comprises and corresponding to second active coil of cross section profile shape of said two spigot surfaces and supporting surface that said second active coil is processed for the orthogonal copper pipe by cross-sectional shape.
Preferably, on said second active coil, be processed with a plurality of spiracles, said heat-eliminating medium is from the spiracle ejection of said second active coil.
Preferably, the power frequency of the ruhmkorff coil when said mating surface is heated is 1000Hz～2000Hz, and specific power is 2.0KW/cm
2～4.0KW/cm
2
Preferably, the power frequency of the ruhmkorff coil during to said spigot surface and supporting surface heating is 1000Hz～2000Hz, and specific power is 1.0KW/cm
2～3.0KW/cm
2
The present invention also provides a kind of induction heating device that in above-mentioned induction hardening method, uses, and comprising:
First induction heating device, first load coil that the mating surface of said grip-pad is heated;
Second induction heating device, second load coil that two spigot surfaces and the supporting surface of said grip-pad heated.
Preferably, said first load coil comprises and corresponding to first active coil of the cross section profile shape of said mating surface that said first active coil is processed for the orthogonal copper pipe by cross-sectional shape, on said first active coil, is processed with a plurality of spiracles.
Preferably, the position of said spiracle is on the sensitive surface and lateral seamed edge of the said copper pipe of processing said first active coil.
Preferably; Said second load coil comprises corresponding to second active coil of cross section profile shape with said two spigot surfaces and supporting surface; Said second active coil is processed for the orthogonal copper pipe by cross-sectional shape, on said second active coil, is processed with a plurality of spiracles.
Preferably, the position of said spiracle is on the sensitive surface and lateral seamed edge of the said copper pipe of processing said second active coil.
The present invention provides a kind of induction hardening method of grip-pad of crawler mounted crane; In said induction hardening method; The present invention uses first induction heating device that the mating surface of said grip-pad is quenched, and uses second induction heating device that the spigot surface and the supporting surface of grip-pad are quenched.Compared with prior art; The present invention uses induction heating device respectively mating surface, spigot surface and supporting surface to be carried out quench treatment; These three positions are high abrading sections of grip-pad; Adopt method of the present invention to carry out effective quench treatment, form satisfactory quench-hardened case on above-mentioned trizonal surface to above-mentioned three zones.
Description of drawings
Fig. 1 is the synoptic diagram that need carry out the grip-pad of induction quenching processing among the present invention;
Fig. 2 is the diagrammatic cross-section of the mating surface of the grip-pad shown in Fig. 1;
Fig. 3 is the side-view of the grip-pad shown in Fig. 1;
Fig. 4 is the synoptic diagram of first induction heating device provided by the invention;
Fig. 5 is a synoptic diagram of processing the siliconized plate of magnetizer;
Fig. 6 is the schematic cross-section that is inlaid with first active coil of magnetizer;
Fig. 7 is the synoptic diagram of second induction heating device provided by the invention.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, describe just to further specifying feature and advantage of the present invention but should be appreciated that these, rather than to the restriction of claim of the present invention.
Shown in Fig. 1-3, Fig. 1 is the synoptic diagram of a kind of embodiment of the grip-pad that need carry out quench treatment among the present invention, and Fig. 2 is the diagrammatic cross-section of the mating surface of grip-pad, and Fig. 3 is the side-view of grip-pad.Said grip-pad comprises base plate 11, and there are two gusset 12a, 12b in the middle part of said base plate, and a plurality of coupling sleeve 12c that are connected with other base plate are arranged respectively in the both sides of said two gussets; The middle part of said base plate is provided with the mating surface 13 with the engagement of the driving wheel of crawler mounted crane, is respectively arranged with in the outside at the two ends of said mating surface to be used for the guide deflection sheave of lifting machine contacted two spigot surface 14a, 14b and to be used for and contacted two the supporting surface 15a of the thrust wheel of lifting machine, 15b.
Said mating surface 13 comprises tooth 103a, two 103b of tooth root portion, 103c, connects tooth 103a and said two 103b of tooth root portion, two flank 103d of 103c, 103e respectively.Said two spigot surfaces and supporting surface are symmetricly set on the both sides of said mating surface, have identical structure, connect for fillet between said spigot surface and the supporting surface.
As shown in Figure 4; Fig. 4 is the synoptic diagram of first induction heating device provided by the invention, and said first induction heating device is used for mating surface is quenched, and comprises first ruhmkorff coil 201; Said first ruhmkorff coil comprises two electrode 21a, 21b; Two the collecting pipe 22a, the 22b that are connected with said two electrodes respectively are connected first active coil 23 between said two collecting pipes, and said first active coil 23 has the corresponding to shape of cross section profile shape with said mating surface; Promptly first active coil is processed the shape with the cross section profile shape profiling of said mating surface, can effectively heat mating surface like this; Be connected with coolant guide pipe 24 on the collecting pipe, be used in collecting pipe and active coil, infeeding water coolant; The insulcrete made from mica between said two electrodes separates.In this embodiment; Said first active coil and said collecting pipe all use cross-sectional shape to process as the orthogonal copper pipe; The cross section is that the advantage of orthogonal copper pipe is can prevent to form soft spots in the dead angle part that face and hand-deliver connect, and for example can prevent that the joint face place of mating surface and spigot surface from forming the dead angle.Wherein, the specification of collecting pipe is 30mm * 20mm, and the specification of active coil is 10mm * 10mm, and the thickness of electrode is 5mm, and the specification of above-mentioned collecting pipe, active coil and electrode can be adjusted according to actual needs.In this embodiment, the material of whole first ruhmkorff coil is the T2 fine copper and processes.
On first active coil 23 of said first induction heating device with on two flank 103d of said mating surface 103a, the corresponding part of 103e magnetizer is being set, magnetizer uses siliconized plate and the formation of magnetic bonding, is bonded on the active coil then.As shown in Figure 5, be siliconized plate 41 synoptic diagram, the shape of siliconized plate and the shape of active coil are complementary, and have an opening.
Among the present invention, when using first induction heating device that mating surface is carried out heating quenching,, on the copper pipe of processing first active coil, be processed with a plurality of spiracles for mating surface is cooled off.In order to reach the ideal cooling performance; In this embodiment, spiracle is arranged on the seamed edge that sensitive surface and the side of the copper pipe of active coil intersects, the direction of spiracle becomes to be preferably 30 °～60 ° angles with sensitive surface; It in this embodiment 45; Spray water when cooling off like this and the direction of water spray and the zone formation 45 that is cooled, can reach better cooling performance, help obtaining uniform quench-hardened case.The bore dia of said spiracle is preferably 1.0mm～2mm, and more preferably 1.2mm～1.8mm is 1.5mm in this embodiment.Distance between the adjacent spiracle of said a plurality of spiracles is preferably 1mm～5mm, and more preferably 3～4mm is 3.5mm in this embodiment.See also Fig. 6; Schematic cross-section for the active coil that is bonded with magnetizer; Spiracle 51 is arranged on the sensitive surface and lateral seamed edge of copper pipe of first active coil, like this can be during with 45 ° angle ejection cooling to the face of being cooled, reach better cooling performance.
See also Fig. 7; Fig. 7 is the synoptic diagram of second induction heating device provided by the invention; Said second induction heating device is used for spigot surface and supporting surface are quenched; Comprise second ruhmkorff coil 301 that matches with the cross-sectional shape of the spigot surface of grip-pad and supporting surface, said second ruhmkorff coil comprises two electrode 31a, 31b, two the collecting pipe 32a, the 32b that are connected with said two electrodes respectively; Be connected second active coil 33 between said two collecting pipes; The cross section profile shape of second active coil and said two spigot surfaces and supporting surface is consistent, and promptly second active coil is processed the shape with the cross section profile shape profiling of said spigot surface and supporting surface, can effectively heat spigot surface and supporting surface like this; The insulcrete made from mica between said two electrodes separates; Be connected with coolant guide pipe 35 on the collecting pipe, be used in collecting pipe and active coil, infeeding water coolant.In this embodiment, said second active coil and said collecting pipe all use cross-sectional shape to process as the orthogonal copper pipe, and the cross section is that the advantage of orthogonal copper pipe is can prevent at face and the dead angle part soft spots of delivering personally and connecing.Wherein, the specification of collecting pipe is 30mm * 20mm, and the specification of active coil is 17mm * 15mm, and the thickness of electrode is 5mm, and the specification of above-mentioned collecting pipe, second active coil and electrode can be adjusted according to actual needs.In this embodiment, the material of whole second ruhmkorff coil is the T2 fine copper and processes.
Be provided with magnetizer with said spigot surface and the corresponding part of supporting surface on the active coil 33 of said second induction heating device, said magnetizer uses siliconized plate and magnetic bonding to form, and is embedded in then on second active coil.Magnetizer on the magnetizer of second induction heating device and the shape of siliconized plate and first induction heating device is identical with the shape of siliconized plate, repeats no more at this.
Among the present invention, when using second induction heating device that spigot surface and supporting surface are carried out heating quenching,, on the copper pipe of processing second active coil, be processed with a plurality of spiracles for spigot surface and supporting surface are cooled off.In order to reach the ideal cooling performance; In this embodiment, spiracle is arranged on the seamed edge that sensitive surface and the side of the copper pipe of active coil intersects, the direction of spiracle becomes to be preferably 30 °～60 ° angles with sensitive surface; It in this embodiment 45; Spray water when cooling off like this and the direction of water spray and the zone formation 45 that is cooled, can reach better cooling performance, help obtaining uniform quench-hardened case.The bore dia of said spiracle is preferably 1.0mm～2mm, and more preferably 1.2mm～1.8mm is 1.5mm in this embodiment.Distance between the adjacent spiracle of said a plurality of spiracles is preferably 1mm～5mm, and more preferably 3～4mm is 3.5mm in this embodiment.
According to the present invention, when using said first induction heating device and second induction heating device that grip-pad is quenched,, require to adjust to get final product according to depth of hardening zone for the parameter of induction heating.
Below with specific embodiment effect of the present invention is described, but protection scope of the present invention is not limited by the following examples.
Embodiment 1
Needing the specification of the grip-pad of processing is the SCC type, and material is ZG30CrMnNiMo, and the equipment that uses in the present embodiment is GCK12200 medium frequency quenching lathe.
Grip-pad surface hardening layer depth confirms that according to its service condition in the present embodiment, mating surface requires depth of hardening zone 3～5mm, and spigot surface and supporting surface require depth of hardening zone 5～8mm.
Adopt the penetration type heating in the present embodiment, even the hot penetration depth Δ of depth of hardening zone D and electric current satisfies: D＜Δ is preferably D=Δ/2.
With spigot surface and supporting surface is example, when 8mm >=D >=5mm, and the hot penetration depth 16mm of electric current >=Δ >=10mm.
Hot penetration depth Δ of electric current and power frequency satisfy formula (I):
In the formula (I): the resistivity of ρ-conductor (Ω cm)
: the magnetic permeability of μ-conductor (H/m)
: f-power frequency (Hz)
One timing of workpiece quenching design temperature, magnetic permeability and specific conductivity are definite value, formula (I) is reduced to formula (II)
Because 16mm>=Δ>=10mm, (II) can calculate according to formula: 975Hz≤f≤2500Hz, power frequency used in the present invention is preferably 1000Hz～2000Hz, in the present embodiment power frequency f is set at 1500Hz.
According to depth of hardening zone and power frequency, the specific power of the ruhmkorff coil when among the present invention mating surface being heated is preferably 2.0KW/cm
2～4.0KW/cm
2, 2.5KW/cm more preferably
2～3.5KW/cm
2, the specific power when in the present embodiment mating surface being heated is decided to be 3.0KW/cm
2According to the present invention, the specific power of the ruhmkorff coil during to spigot surface and supporting surface heating is preferably 1.0KW/cm
2～3.0KW/cm
2, 1.5KW/cm more preferably
2～2.0KW/cm
2, the specific power of the ruhmkorff coil in the present embodiment during to the heating of spigot surface and supporting surface is decided to be 1.6KW/cm
2
After specific power is confirmed, can calculate induction heating power according to formula (III):
P
L＝Fρ(KW) (III)
In the formula (III): the area (cm of a heating quenching of F-
2)
ρ-specific power (KW/cm
2)
After induction heating power was confirmed, by formula (IV) calculated the output rating of equipment:
P
E＝P
L/η
tη
i
In the formula in (III): η
t-induction hardening transformer efficient, general η
t=0.7～0.8 (intermediate frequency capping)
η
i-induction coil efficient, general η
t=0.7～0.85 (intermediate frequency capping)
The inductor block translational speed is the hot face of unit time, and in the medium frequency quenching lathe of our company, 1% translational speed is equivalent to the speed of 0.23mm/s.
In the present embodiment, temperature of cooling water is 30 ℃, and pressure is 0.2MPa.
In the present embodiment, the gap of workpiece and induction coil, mating surface direction 5mm, spigot surface and supporting surface direction 3mm.
In the present embodiment; To the workpiece model is that the workpiece of Q50, Q80, Q100, Q150, Q250, Q320, Q400, Q630 quenches; Processing parameter sees also table 1; Wherein the direction of mating surface uses first induction heating device to quench, and uses second induction heating device to quench in the direction of spigot surface and supporting surface.
Table 1 grip-pad quenching process parameters
Above-mentioned grip-pad all uses same tempering process, is specially: 150 ℃ * 3h.
Experimental result:
1, surface crack:
After the induction heat treatment, to the processing of detecting a flaw of above-mentioned workpiece, the flaw detection agent detects surperficial flawless, macroscopical visual inspection surface do not have burn, defective that influence such as pit is used.
2, hardness detects
Adopt portable Leeb Hardness Tester to detect surface hardness; Measuring result to mating surface and spigot surface and supporting surface shows; All within HRC50～55 scopes, fluctuation range meets JB/T9201-1999 " inducing quenching and tempering of steel part is handled " regulation less than 5HRC to surface hardness.
3, depth of hardening zone detects
The effective depth of hardening of metallographic method measuring workpieces is specially: obtain sample along the upper thread cut workpiece of vertically hardening, after the polishing, after the nital corrosion, measure depth of hardening zone then, detected result is like table 2-table 17
Table 2 Q50 grip-pad mating surface depth of hardening zone (mm)
Table 3 Q50 grip-pad spigot surface and supporting surface depth of hardening zone (mm)
Table 4 Q80 grip-pad mating surface depth of hardening zone (mm)
Table 5 Q80 grip-pad spigot surface and supporting surface depth of hardening zone (mm)
Table 6 Q100 grip-pad mating surface depth of hardening zone (mm)
Table 7 Q100 grip-pad spigot surface and supporting surface depth of hardening zone (mm)
Table 8 Q150 grip-pad mating surface depth of hardening zone (mm)
Table 9 Q150 grip-pad spigot surface and supporting surface depth of hardening zone (mm)
Table 10 Q250 grip-pad mating surface depth of hardening zone (mm)
Table 11 Q250 grip-pad spigot surface and supporting surface depth of hardening zone (mm)
Table 12 Q320 grip-pad mating surface depth of hardening zone (mm)
Table 13 Q320 grip-pad spigot surface and supporting surface depth of hardening zone (mm)
Table 14 Q400 grip-pad mating surface depth of hardening zone (mm)
Table 15 Q400 grip-pad spigot surface and supporting surface depth of hardening zone (mm)
Table 16 Q630 grip-pad mating surface depth of hardening zone (mm)
Table 17 Q630 grip-pad spigot surface and supporting surface depth of hardening zone (mm)
The test result of table 2-table 17 shows, adopt method of the present invention that grip-pad is carried out induction quenching after, the surface hardening layer depth of mating surface, spigot surface and supporting surface all can meet the demands.
More than the induction hardening method and the device of the grip-pad of crawler mounted crane provided by the present invention carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (14)
1. the induction hardening method of the grip-pad of a crawler mounted crane is characterized in that, comprising:
Use first induction heating device that the mating surface of grip-pad is carried out the hard surfacing processing, use second induction heating device that the spigot surface and the supporting surface of grip-pad are carried out the hard surfacing processing;
Said grip-pad comprises base plate, is arranged on the said base plate mating surface middle part, that be meshed with driving wheel; Be arranged on the said base plate, with contacted two supporting surfaces of supporting-point roller, be arranged on the said base plate, with contacted two spigot surfaces of guide deflection sheave;
Said first induction heating device comprises first load coil that said mating surface is heated, and said second induction heating device comprises second load coil that said two spigot surfaces and supporting surface are heated;
Said use first induction heating device carries out hard surfacing to the mating surface of grip-pad and is treated to: move said first load coil along the direction that axially parallels with said driving wheel the surface of said mating surface is heated; The gap of said mating surface and said first load coil is 2～6mm; The surface of the said mating surface of spray cooling;
Said second induction heating device carries out hard surfacing to the spigot surface of said grip-pad and supporting surface and is treated to: along moving said second load coil perpendicular to said live axle to perpendicular direction the surface of said two spigot surfaces and supporting surface is heated; The gap of said spigot surface and supporting surface and said second load coil is 2～6mm; The surface of spray said two spigot surfaces of cooling and supporting surface.
2. induction hardening method according to claim 1 is characterized in that, the spray direction of the heat-eliminating medium when said spray cools off said mating surface be 30 °～60 ° by the spray face angulation.
3. induction hardening method according to claim 2; It is characterized in that; Said first load coil comprises and corresponding to first active coil of the cross section profile shape of said mating surface that said first active coil is processed for the orthogonal copper pipe by cross-sectional shape.
4. induction hardening method according to claim 3 is characterized in that, on said first active coil, is processed with a plurality of spiracles, and said heat-eliminating medium sprays from said spiracle.
5. induction hardening method according to claim 1 is characterized in that, the spray direction of the heat-eliminating medium when said spray cools off said spigot surface and supporting surface be 30 °～60 ° by the spray face angulation.
6. induction hardening method according to claim 5; It is characterized in that; Second load coil comprises and corresponding to second active coil of cross section profile shape of said two spigot surfaces and supporting surface that said second active coil is processed for the orthogonal copper pipe by cross-sectional shape.
7. induction hardening method according to claim 6 is characterized in that, on said second active coil, is processed with a plurality of spiracles, and said heat-eliminating medium is from the spiracle ejection of said second active coil.
8. according to each described induction hardening method of claim 1 to 7, it is characterized in that the power frequency of the ruhmkorff coil when said mating surface is heated is 1000Hz～2000Hz, specific power is 2.0KW/cm
2～4.0KW/cm
2
9. according to each described induction hardening method of claim 1 to 7, it is characterized in that the power frequency of the ruhmkorff coil during to said spigot surface and supporting surface heating is 1000Hz～2000Hz, specific power is 1.0KW/cm
2～3.0KW/cm
2
10. the induction heating device that uses in each described induction hardening method of claim 1 to 9 is characterized in that, comprising:
First induction heating device, first load coil that the mating surface of said grip-pad is heated;
Second induction heating device, second load coil that two spigot surfaces and the supporting surface of said grip-pad heated.
11. induction heating device according to claim 10; It is characterized in that; Said first load coil comprises and corresponding to first active coil of the cross section profile shape of said mating surface; Said first active coil is processed for the orthogonal copper pipe by cross-sectional shape, on said first active coil, is processed with a plurality of spiracles.
12. induction heating device according to claim 11 is characterized in that, the position of said spiracle is on the sensitive surface and lateral seamed edge of the said copper pipe of processing said first active coil.
13. induction heating device according to claim 10; It is characterized in that; Said second load coil comprises corresponding to second active coil of cross section profile shape with said two spigot surfaces and supporting surface; Said second active coil is processed for the orthogonal copper pipe by cross-sectional shape, on said second active coil, is processed with a plurality of spiracles.
14. induction heating device according to claim 13 is characterized in that, the position of said spiracle is on the sensitive surface and lateral seamed edge of the said copper pipe of processing said second active coil.
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| CN201110095556XA CN102181611B (en) | 2011-04-15 | 2011-04-15 | Induction quenching method for crawler belt plate of crawler crane and device |
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| CN102719648A (en) * | 2012-07-12 | 2012-10-10 | 中南大学 | Thermal treatment method and device for metal sheets |
| CN103882207A (en) * | 2013-12-13 | 2014-06-25 | 柳州市柳港激光科技有限公司 | Medium-frequency quenching process of smoothing roll and quenching equipment thereof |
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| CN112080611A (en) * | 2020-09-21 | 2020-12-15 | 山西中设华晋铸造有限公司 | Surface quenching process of high-strength alloy steel track shoe |
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| US4188243A (en) * | 1977-02-08 | 1980-02-12 | Nippon Kokan Kabushiki Kaisha | Method and apparatus for heat-treating metallic material |
| EP1052295A2 (en) * | 1999-05-12 | 2000-11-15 | Benteler Ag | Method for manufacturing of construction parts in automobile construction |
| CN2905816Y (en) * | 2006-05-12 | 2007-05-30 | 山推工程机械股份有限公司 | Creeper tread quenching device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06346152A (en) * | 1993-06-07 | 1994-12-20 | Sumitomo Metal Ind Ltd | Lead patenting apparatus for high carbon steel wire |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4188243A (en) * | 1977-02-08 | 1980-02-12 | Nippon Kokan Kabushiki Kaisha | Method and apparatus for heat-treating metallic material |
| EP1052295A2 (en) * | 1999-05-12 | 2000-11-15 | Benteler Ag | Method for manufacturing of construction parts in automobile construction |
| CN2905816Y (en) * | 2006-05-12 | 2007-05-30 | 山推工程机械股份有限公司 | Creeper tread quenching device |
Non-Patent Citations (1)
| Title |
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| JP特开平6-346152A 1994.12.20 |
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