CN101570812B - Steering arm shaft induction heating tempering technology - Google Patents
Steering arm shaft induction heating tempering technology Download PDFInfo
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- CN101570812B CN101570812B CN2009100667052A CN200910066705A CN101570812B CN 101570812 B CN101570812 B CN 101570812B CN 2009100667052 A CN2009100667052 A CN 2009100667052A CN 200910066705 A CN200910066705 A CN 200910066705A CN 101570812 B CN101570812 B CN 101570812B
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Abstract
The invention relates to steering arm shaft induction heating tempering technology. The technology is characterized in that a screw end to be tempered is upward placed between upper tip and lower tip of a quenching machine to be clamped tightly; a start button is pressed, and the work piece starts to rotate and to be heated; in the whole process of heating, an axial protective spray case constantly sprays water, and water spraying is stopped when delay time is up; rotation is stopped, a sensor rises to the original position; the component is fetched to complete tempering. The technology fulfils the induction heating tempering quality and application performance of the component; the sensor has simple structure, short process time, high production efficiency, energy conservation and low process cost; the tempering temperature on a C point round angle can achieve the process requirement with hardness being reduced below 45HRC and other positions being over 20HRC, by adopting an intermittent heating mode through the effect of heat conduction.
Description
Technical field:
The present invention relates to a kind of steering arm shaft induction heating tempering method.
Background technology:
Steering arm shaft is the strength member of commercial car steering, is used for transmitting steering moment, according to its applying working condition and service condition, requires to carry out carburizing treatment, solves rippling or broken teeth problem.Produce quenching crack and delayed cracking and can bring in the carburizing treatment process at screw thread place and fillet place, cause in use appearing at screw thread place fracture.In manufacturing processed, require in time to carry out temper at run-out(of thread), eliminate delayed cracking, guarantee part quality.
The induction tempering technical requirements
Material: 27NiCrMo
As-heat-treated condition in advance: carburizing treatment is greater than 58HRC
Refined zone scope: the excessive fillet of screw thread and run-out(of thread) and spline place
The screw thread root 20-40HRC of place that centre hardness: A, B are ordered
Fillet place hardness: the C point fillet 30-45HRC of place
The heat affected zone should not surpass apart from spline end face 18mm(0.7inch), the surface hardness of the regional cementation zone beyond this boundary is greater than 58HRC, spline root effective case depth DC=50HRC〉0.635(0.025 inch).
Can find out from above part sketch and induction tempering technical requirements, this part requires to carry out induction heating tempering at the M30 screw thread with fillet place that Φ 40 spline ends have a common boundary, and concrete technical requirements as mentioned above.
Summary of the invention:
The object of the present invention is to provide a kind of steering arm shaft induction heating tempering method, satisfied induction heating tempering quality and the use properties of part; Inductor block simple in structure, the process time is short, and production efficiency is high, and the save energy process costs is low; Adopt the intermittent type type of heating, by heat conducting effect, make the tempering temperature at C point fillet place reach processing requirement, lower hardness is below 45HRC, and other position of screw thread is more than 20HRC.
Technical scheme of the present invention is achieved in that a kind of steering arm shaft induction heating tempering method, it is characterized in that: its technological process is as follows: (A) contact plate of the inductor block induction hardening transformer with quenching machine is tightened together; Guaranteeing under the unobstructed condition in water coolant and quenching water route, the threaded end regions of need tempering is placed between quenching machine top is up and down up clamping; (B) press start button, workpiece begins rotation, inductor block is dropped rapidly to the position that part need heat and begins heating, two pole plate and inductor block formation circulation of exchange current this moment by induction hardening transformer, the frequency of induction heating power is 8-35kHz, and near coil generation magnetic field, under the effect of this alternating magnetic field, make and produce induced current near the metal parts that is placed on the active wires and make the part heating, the coil of the coaxial series inductor of two circle reducings is made by the 6X6X0.8 copper tube, Φ 36 internal diameters and excessive part coil are used for heating screw thread place, and Φ 48 internal diameters and excessive part coil are used for heating spline end and run-out(of thread); Wherein Φ 36 internal diameter coils are higher than screw thread end face 2.5-3mm; Spline end is higher than Φ 48 internal diameter coil 2.5-3mm; An axially protection water spray box is set below Φ 48 internal diameter coils, is used for the bottom of cooling spline in drawing process, protection is 5-6mm with the end play between water spray box and the Φ 48 internal diameter coils; To ensure 50-80 ℃ superheating temperature at part spline end and screw tip; (C) whole process of heating axially protects the water spray box to continue water spray; Heat-processed is as follows: begin heating, water spray, and time-delay 2s → delay time is to stopped heating, and time-delay 2s → delay time is to beginning heating, and time-delay 1s → delay time is to stopped heating, and time-delay 2s → delay time is to beginning heating, and time-delay 2s → delay time is to stopped heating, and time-delay 2s → delay time is to beginning heating, and time-delay 1s → delay time is to stopped heating, and time-delay 2s → delay time is to beginning heating, and time-delay 2s → delay time is to stopped heating, and the 2s that delays time; Delay time is to stopping water spray; Stop the rotation, inductor block rises to original position; Unclamp toply, part taken off finish tempering.
One end of the coil of quenching inducer and two converging wires is welded together, and two water inlet pipes are welded on the contact plate of two symmetries after being welded in respectively the other end of converging wires; Axially protection water spray box is welded on the converging wires by web plate respectively; Tighten together with two brass bolts, four round brass washers, four insulating washers, two insulation thimble, two brass nuts.
Positively effect of the present invention is induction heating tempering quality and the use properties that has satisfied part; Inductor block simple in structure, the process time is short, and production efficiency is high, and the save energy process costs is low; Adopt the intermittent type type of heating, by heat conducting effect, make the tempering temperature at C point fillet place reach processing requirement, lower hardness is below 45HRC, and other position is more than 20HRC.
Description of drawings:
Fig. 1 is the structural representation of quench part of the present invention;
Fig. 2 is sensor structure schematic diagram of the present invention;
Embodiment:
The present invention will be further described below in conjunction with accompanying drawing: a kind of steering arm shaft induction heating tempering method is characterized in that: its technological process is as follows: (A) contact plate 1 of the inductor block induction hardening transformer with quenching machine is tightened together; Guaranteeing under the unobstructed condition in water coolant and quenching water route, the threaded end regions of need tempering is placed between quenching machine top is up and down up clamping; (B) press start button, workpiece begins rotation, inductor block is dropped rapidly to the position that part need heat and begins heating, two pole plate and inductor block formation circulation of exchange current this moment by induction hardening transformer, the frequency of induction heating power is 8-35kHz, and near coil 9 generation magnetic field, under the effect of this alternating magnetic field, make and produce induced current (eddy current) near the metal parts that is placed on the active wires and make the part heating, the coil 9 of the coaxial series inductor of two circle reducings is made by the 6X6X0.8 copper tube, Φ 36 internal diameters and excessive part coil are used for heating screw thread place, and Φ 48 internal diameters and excessive part coil are used for heating spline end and run-out(of thread); Wherein Φ 36 internal diameter coils are higher than screw thread end face 2.5-3mm; Spline end is higher than Φ 48 internal diameter coil 2.5-3mm; An axially protection water spray box is set below Φ 48 internal diameter coils, is used for the bottom of cooling spline in drawing process, protection is 5-6mm with the end play between water spray box and the Φ 48 internal diameter coils; In heat-processed, adopt repeatedly the intermittent heating, by heat conducting effect, heat is passed to C point fillet place, make it reach the temperature of tempering process requirement.In order to shorten the process time that reaches tempering temperature at C point fillet place, under the prerequisite that does not affect temper number, to ensure 50-80 ℃ superheating temperature at part spline end and screw tip; (C) whole process of heating axially protects the water spray box to continue water spray; Heat-processed is as follows: begin heating, water spray, and time-delay 2s → delay time is to stopped heating, and time-delay 2s → delay time is to beginning heating, and time-delay 1s → delay time is to stopped heating, and time-delay 2s → delay time is to beginning heating, and time-delay 2s → delay time is to stopped heating, and time-delay 2s → delay time is to beginning heating, and time-delay 1s → delay time is to stopped heating, and time-delay 2s → delay time is to beginning heating, and time-delay 2s → delay time is to stopped heating, and the 2s that delays time; Delay time is to stopping water spray; Stop the rotation, inductor block rises to original position; Unclamp toply, part taken off finish tempering.
An end of the coil 9 of quenching inducer and two converging wires 11 is welded together as shown in drawings, is welded on the contact plate 1 of two symmetries after two water inlet pipes 7 being welded in respectively the other end of converging wires, forms the current circuit of inductor block; Axially protection water spray box is welded on the converging wires 11 by web plate 8,10 respectively; After the insulation of two contact plates, 1 usefulness insulating pad, tighten together with two brass bolts 2, four round brass washers 3, four insulating washers 4, two insulation thimble 5, two brass nuts 6.
The present invention is placed on metallic conductor in the coil that is connected with exchange current, according to electromagnetic induction principle under the effect of alternating magnetic field, can in conductor, produce the induced current (eddy current) identical with opposite direction, equal and opposite in direction, the frequency of coil midstream overcurrent, utilize the induced current that in this conductor, produces to make the method for its heating be referred to as " induction heating ".
Its material: 27NiCrMo
As-heat-treated condition in advance: carburizing treatment is greater than 58HRC
Refined zone scope: the excessive fillet of screw thread and run-out(of thread) and spline place
The screw thread root 20-40HRC of place that centre hardness: A, B are ordered
Fillet place hardness: the C point fillet 30-45HRC of place
The heat affected zone should not surpass apart from spline end face 18mm(0.7inch), the surface hardness of the regional cementation zone beyond this boundary is greater than 58HRC, spline root effective case depth DC=50HRC〉0.635(0.025 inch).
Can find out from above part sketch and induction tempering technical requirements, this part requires to carry out induction heating tempering at the M30 screw thread with fillet place that Φ 40 spline ends have a common boundary.
Table 1 flange-output shaft neck and end face be quenching process parameters simultaneously
| Galvanic current | Volts DS | The power assignment | Real power | The turn ratio | Electric capacity | Frequency | Heat-up time | Cooling time |
| 140A | 180V | 25kW | 20-25kW | 9：1 | 32.4μF | 8.5-9kHz | See technological process | See technological process |
Hardness results
Claims (1)
1. steering arm shaft induction heating tempering method, it is characterized in that: its technological process is as follows: (A) contact plate of the inductor block induction hardening transformer with quenching machine is tightened together; Guaranteeing under the unobstructed condition in water coolant and quenching water route, the thread end of need tempering is placed between quenching machine top is up and down up clamping; (B) press start button, workpiece begins rotation,
Inductor block is dropped rapidly to the position that part need heat and begins heating, two pole plate and inductor block formation circulation of exchange current this moment by induction hardening transformer, the frequency of induction heating power is 8-35kHz, and near coil generation magnetic field, under the effect of this alternating magnetic field, make and produce induced current near the metal parts that is placed on the active wires and make the part heating, the coil of the coaxial series inductor of two circle reducings is made by 6X6X0. 8 copper tubes, Φ 36 internal diameters and transition portion coil are used for heating screw thread place, and Φ 48 internal diameters and transition portion coil are used for heating spline end and run-out(of thread); Wherein Φ 36 internal diameter coils are higher than screw thread end face 2.5-3mm; Spline end is higher than Φ 48 internal diameter coil 2.5-3mm; An axially protection water spray box is set below Φ 48 internal diameter coils, is used for the bottom of cooling spline in drawing process, protection is 5-6mm with the end play between water spray box and the Φ 48 internal diameter coils; Part spline end and screw tip will have 50 ℃-80 ℃ superheating temperature; (C) whole process of heating axially protects the water spray box to continue water spray; Heat-processed is as follows: begin heating, water spray, and 2 s that delay time → delay time is to stopped heating, and time-delay 2s → delay time is to beginning heating, and time-delay 1s → delay time is to stopped heating, and 2 s that delay time → delay time is to beginning heating, and time-delay 2s → delay time is to stopped heating, and time-delay 2s → delay time is to beginning heating, and time-delay 1s → delay time is to stopped heating, and 2 s that delay time → delay time is to beginning heating, and time-delay 2s → delay time is to stopped heating, and 2 s that delay time; Delay time is to stopping water spray; Stop the rotation, inductor block rises to original position; Unclamp toply, part taken off finish tempering.
2. a kind of steering arm shaft induction heating tempering method according to claim 1, the coil (9) that it is characterized in that described quenching inducer is welded together with an end of two converging wires (11), and two water inlet pipes (7) are welded on the contact plate (1) of two symmetries after being welded in respectively the other end of converging wires (1); Axially protection water spray box is welded on the converging wires (11) by web plate respectively; Two contact plates (1) are tightened together with two brass bolts (2), four round brass washers (3), four insulating washers (4), two (5) two brass nuts of insulation thimble (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100667052A CN101570812B (en) | 2009-03-27 | 2009-03-27 | Steering arm shaft induction heating tempering technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100667052A CN101570812B (en) | 2009-03-27 | 2009-03-27 | Steering arm shaft induction heating tempering technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101570812A CN101570812A (en) | 2009-11-04 |
| CN101570812B true CN101570812B (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100667052A Expired - Fee Related CN101570812B (en) | 2009-03-27 | 2009-03-27 | Steering arm shaft induction heating tempering technology |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921902B (en) * | 2010-08-13 | 2013-09-25 | 中国第一汽车集团公司 | Induction quenching method of shifting guide shaft of automatic transmission |
| CN101921899B (en) * | 2010-08-13 | 2013-08-14 | 中国第一汽车集团公司 | Induction quenching method of gearshift shaft of change gear case |
| CN102115810A (en) * | 2010-12-22 | 2011-07-06 | 中国第一汽车集团公司 | Induction-heating normalizing inductor and induction-heating normalizing process for drive bevel gear |
| CN102808076A (en) * | 2012-08-21 | 2012-12-05 | 青岛德盛机械制造有限公司 | Annealing device |
| CN103160653B (en) * | 2013-03-22 | 2015-02-18 | 扬州大学 | Sensor for read arm in electronic multi-arm opening device of high speed loom |
| CN104419815A (en) * | 2013-08-22 | 2015-03-18 | 上海纳铁福传动系统有限公司 | Induction tempering technology for shaft parts and inductor |
| CN107858496B (en) * | 2017-12-18 | 2023-09-08 | 常熟市龙腾滚动体制造有限公司 | Steel bar heat treatment production line |
| CN110551875A (en) * | 2019-09-18 | 2019-12-10 | 中国第一汽车股份有限公司 | Quenching device and quenching method for inner surface of automobile steering ball seat |
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- 2009-03-27 CN CN2009100667052A patent/CN101570812B/en not_active Expired - Fee Related
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| C06 | Publication | ||
| PB01 | Publication | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA FAW CO., LTD. Free format text: FORMER OWNER: CHINESE AUTO GROUP CO NO.1 Effective date: 20111205 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20111205 Address after: 130011 Changchun Province, West New Economic and Technological Development Zone, Dongfeng Street, No. 2259, No. Applicant after: China FAW Group Corporation Address before: 130011 Dongfeng Street, Jilin, Changchun, No. 2259 Applicant before: China FAW Group Corporation |
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| SE01 | Entry into force of request for substantive examination | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20200327 |