CN102102143A - Heat treatment process of limited deep hardening of groove end of shifting fork and special device thereof - Google Patents
Heat treatment process of limited deep hardening of groove end of shifting fork and special device thereof Download PDFInfo
- Publication number
- CN102102143A CN102102143A CN 201010146808 CN201010146808A CN102102143A CN 102102143 A CN102102143 A CN 102102143A CN 201010146808 CN201010146808 CN 201010146808 CN 201010146808 A CN201010146808 A CN 201010146808A CN 102102143 A CN102102143 A CN 102102143A
- Authority
- CN
- China
- Prior art keywords
- groove end
- treatment process
- curved surface
- thermal treatment
- fork slot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a heat treatment process of the limited deep hardening of the groove end of a shifting fork and a special parallel sheet-shaped double-circuit curved surface notched inside induction coil thereof, belongs to the processing field of heat treatment. The heat treatment process comprises the following steps: (1) high-frequency induction quenching is performed to local groove end of the shifting fork which is forged preliminarily, normalized and machined; (2) cooling water is injected by an injection pipe to cool the groove end; and (3) tempering local groove end; in addition, when high-frequency induction quenching treatment is performed to local groove end, a CYP-40 super-audio frequency induction heating device is used and the parallel sheet-shaped double-circuit curved surface notched inside induction coil is added aiming at the characteristic of the groove end that the both sides are thin and the middle is thick; and in order to prevent that the hardness of the front edge is not enough, a silicon steel plate is added on the front part of the groove end, thus the loss of magnetic lines can be lowered and the induction efficiency can be increased.
Description
Technical field
The present invention relates to a kind of thermal treatment process and equipment used field, especially a kind of thermal treatment process and specific equipment thereof that fork slot end finite depth is hardened of being used for.
Background technology
At present the great majority corporate bosses that produce shift forks will be faced with following two problems, one, some inside and outside hardness require to have big gap shift fork when producing, big difficulty is arranged on technology; Two, the fork slot end of being produced can not meet the processing requirement that finite depth is hardened mostly, is difficult to reach a millimeter rank requirement; The present invention efficiently solves above two problems by technology and the special-purpose improvement that sets.
Summary of the invention
Technical assignment of the present invention is at the deficiency in the above-mentioned technology, and a kind of thermal treatment process and special-purpose sheet in parallel double loop curved surface recess medial surface ruhmkorff coil thereof that fork slot end finite depth is hardened is provided.
Technical solution technical scheme that problem adopts of the present invention is: this invention designed to technology may further comprise the steps, (1) is carried out high-frequency induction hardening to the portion of groove end office (EO) of the shift fork after preliminary forging and molding, normalizing and machining and is handled; (2) by spray tube shower cooling water the groove end is cooled off; (3) portion of groove end office (EO) tempering.
35 ℃ ± 5 ℃ of described temperature of cooling water, and described spray tube adopts the flat injection pipe.
Described fork slot end outer upper ends and lower end all are provided with compressed air pipe.
Low temperature salt made from earth containing a comparatively high percentage of sodium chloride liquid pool is used in the tempering of portion of described groove end office (EO), and is provided with oil groove in described low temperature salt made from earth containing a comparatively high percentage of sodium chloride liquid pool.
Portion of described groove end office (EO) tempering heat-up time is 45 ± 5 minutes, and Heating temperature is 190 ℃ ± 5 ℃.
Described groove end front portion is provided with magnetizer, and described magnetizer is a siliconized plate.
The specific equipment of realizing the described thermal treatment process that fork slot end finite depth is hardened of claim 1 is a sheet in parallel double loop curved surface recess medial surface ruhmkorff coil, it is formed in parallel by two groups of sheet curved surface recess medial surface ruhmkorff coils, be that every group of sheet curved surface recess medial surface ruhmkorff coil respectively constitutes a loop with power supply, a loop is provided with slide rheostat therein.
Described every group of sheet curved surface recess medial surface ruhmkorff coil and groove termination synapsis all are provided with two recesses up and down.
The beneficial effect that the present invention can bring is:
1, the present invention can effectively solve surfaces externally and internally hardness require to have big gap the difficulty of shift fork when producing;
2, the present invention can satisfy the requirement that mm rank finite depth is hardened by technologic improvement and peculiar equipment.
Description of drawings
Fig. 1, the related shift fork structural representation of structure of the present invention.
Fig. 2, shift fork add equipment used use in man-hour figure.
Fig. 3, sheet in parallel double loop curved surface recess medial surface ruhmkorff coil be the structural representation in a loop wherein.
Embodiment
Below in conjunction with accompanying drawing, the present invention is done following detailed description:
As shown in drawings, a kind of thermal treatment process that fork slot end finite depth is hardened of the present invention, it may further comprise the steps, and (1) carries out the high-frequency induction hardening processing to the portion of groove end office (EO) of the shift fork after preliminary forging and molding, normalizing and machining; (2) by spray tube shower cooling water the groove end is cooled off; (3) portion of groove end office (EO) tempering.
Not enough for fear of groove end forward position hardness, be equipped with magnetizer in groove end front portion, described magnetizer is a siliconized plate, to reduce the loss of magnetic line of force, improves induction efficiency.
Used temperature of cooling water is 35 ℃ ± 5 ℃, and described spray tube adopts the flat injection pipe, it is higher simultaneously may hardness to occur for fear of fork slot end outside, has compressed air pipe on fork slot end outside, controls the water coolant that spray tube ejects well and splashes fork slot end outside.
Low temperature salt made from earth containing a comparatively high percentage of sodium chloride liquid pool is used in the partial tempering of fork slot end, and is provided with oil groove in described low temperature salt made from earth containing a comparatively high percentage of sodium chloride liquid pool, and portion of described groove end office (EO) tempering heat-up time be 45 ± 5 minutes, Heating temperature is 190 ℃ ± 5 ℃.
Simultaneously carry out high-frequency induction hardening when handling in portion of groove end office (EO), except that adopting CYP-40 ultrasonic frequency induction heating equipment, the characteristics of also thin at groove end both sides, thick middle have added sheet in parallel double loop curved surface recess medial surface ruhmkorff coil; This ruhmkorff coil is formed in parallel by two groups of sheet curved surface recess medial surface ruhmkorff coils, be that every group of sheet curved surface recess medial surface ruhmkorff coil respectively constitutes a loop with power supply, a loop is provided with slide rheostat therein, can adjust electric current as required, described every group of sheet curved surface recess medial surface ruhmkorff coil and groove termination synapsis all are provided with two recesses up and down.
The present invention can solve surfaces externally and internally hardness require to have big gap the difficulty of shift fork when producing; Can also satisfy the requirement that other finite depth of mm level is hardened, the induction heating of the fork slot end of especially thin, thick middle at both sides.
Claims (8)
1. thermal treatment process that fork slot end finite depth is hardened is characterized in that: may further comprise the steps, (1) is carried out high-frequency induction hardening to the portion of groove end office (EO) of the shift fork after preliminary forging and molding, normalizing and machining and is handled; (2) by spray tube shower cooling water the groove end is cooled off; (3) portion of groove end office (EO) tempering.
2. the thermal treatment process that fork slot end finite depth according to claim 1 hardens is characterized in that: 35 ℃ ± 5 ℃ of described temperature of cooling water, described spray tube adopts the flat injection pipe.
3. the thermal treatment process that fork slot end finite depth according to claim 1 hardens is characterized in that: described fork slot end outer upper ends and lower end all are provided with compressed air pipe.
4. the thermal treatment process that fork slot end finite depth according to claim 1 hardens is characterized in that: low temperature salt made from earth containing a comparatively high percentage of sodium chloride liquid pool is used in the tempering of portion of described groove end office (EO), and is provided with oil groove in the pond.
5. the thermal treatment process that fork slot end finite depth according to claim 1 hardens is characterized in that: portion of described groove end office (EO) tempering heat-up time is 45 ± 5 minutes, and Heating temperature is 190 ℃ ± 5 ℃.
6. the thermal treatment process that fork slot end finite depth according to claim 1 hardens is characterized in that: described groove end front portion is provided with magnetizer, and described magnetizer is a siliconized plate.
7. the specific equipment of realizing the described thermal treatment process that fork slot end finite depth is hardened of claim 1 is a sheet in parallel double loop curved surface recess medial surface ruhmkorff coil, it is characterized in that: this special induction coil is to be formed in parallel by two groups of sheet curved surface recess medial surface ruhmkorff coils, be that every group of sheet curved surface recess medial surface ruhmkorff coil respectively constitutes a loop with power supply, a loop is provided with slide rheostat therein.
8. sheet in parallel according to claim 7 double loop curved surface recess medial surface ruhmkorff coil is characterized in that: described every group of sheet curved surface recess medial surface ruhmkorff coil and groove termination synapsis all are provided with two recesses up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010146808 CN102102143A (en) | 2010-04-11 | 2010-04-11 | Heat treatment process of limited deep hardening of groove end of shifting fork and special device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010146808 CN102102143A (en) | 2010-04-11 | 2010-04-11 | Heat treatment process of limited deep hardening of groove end of shifting fork and special device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102102143A true CN102102143A (en) | 2011-06-22 |
Family
ID=44155210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010146808 Pending CN102102143A (en) | 2010-04-11 | 2010-04-11 | Heat treatment process of limited deep hardening of groove end of shifting fork and special device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102102143A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787219A (en) * | 2012-08-01 | 2012-11-21 | 山东科技大学 | Induction quenching method for controlling magnetic flux leakage of workpiece groove by coating magnetizer |
| CN106148662A (en) * | 2015-03-31 | 2016-11-23 | 上海纳铁福传动系统有限公司 | Annealing device and heat treatment method for heating quenching three pin shaft fork shank |
| CN107653369A (en) * | 2017-10-10 | 2018-02-02 | 北京北方车辆集团有限公司 | A kind of high-frequency induction heating case heat treating method |
| CN113528788A (en) * | 2021-07-27 | 2021-10-22 | 温州天和汽车部件有限公司 | Shifting fork surface high-frequency quenching process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5667603A (en) * | 1994-09-05 | 1997-09-16 | Ntn Corporation | Hardening process and apparatus for holed flat parts |
-
2010
- 2010-04-11 CN CN 201010146808 patent/CN102102143A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5667603A (en) * | 1994-09-05 | 1997-09-16 | Ntn Corporation | Hardening process and apparatus for holed flat parts |
Non-Patent Citations (2)
| Title |
|---|
| 《2002年中国机械工程学会年会》 20021231 林德成等 异形拨叉件浇铸锻造工艺应用 , 2 * |
| 《机械工程师》 20051231 罗俊 拨叉淬火工艺改进 , 第9期 2 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787219A (en) * | 2012-08-01 | 2012-11-21 | 山东科技大学 | Induction quenching method for controlling magnetic flux leakage of workpiece groove by coating magnetizer |
| CN102787219B (en) * | 2012-08-01 | 2015-07-15 | 山东科技大学 | Induction quenching method for controlling magnetic flux leakage of workpiece groove by coating magnetizer |
| CN106148662A (en) * | 2015-03-31 | 2016-11-23 | 上海纳铁福传动系统有限公司 | Annealing device and heat treatment method for heating quenching three pin shaft fork shank |
| CN106148662B (en) * | 2015-03-31 | 2017-11-03 | 上海纳铁福传动系统有限公司 | Annealing device and heat treatment method for the pin shaft fork shank of heating quenching three |
| CN107653369A (en) * | 2017-10-10 | 2018-02-02 | 北京北方车辆集团有限公司 | A kind of high-frequency induction heating case heat treating method |
| CN113528788A (en) * | 2021-07-27 | 2021-10-22 | 温州天和汽车部件有限公司 | Shifting fork surface high-frequency quenching process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102102143A (en) | Heat treatment process of limited deep hardening of groove end of shifting fork and special device thereof | |
| CN202030786U (en) | Sensor for simultaneous quenching of multiple positions of crankshaft | |
| CN110607426A (en) | Half shaft part quenching inductor and quenching method | |
| CN105986092A (en) | Subzero treatment process | |
| CN210104013U (en) | Double-coil single-tooth induction quenching device | |
| CN102560016B (en) | Surface induction hardening inductor for V-shaped roller cross linear guide rail | |
| CN104975148B (en) | A kind of method of steel ball or the double quenching of steel forging | |
| CN101555544B (en) | Heat treatment facility for soft magnetic winding core in transverse magnetic field and method thereof | |
| CN110607421A (en) | High-frequency quenching inductor and quenching method for sheet workpieces | |
| CN102409142B (en) | Commercial vehicle gear box three-speed gear induction quenching process | |
| CN216337795U (en) | Inductor for quenching raceway of inner gear ring of slewing bearing | |
| CN106356187B (en) | Ooze dysprosium technique in a kind of neodymium iron boron surface | |
| CN104561471A (en) | Heat treatment production line | |
| CN201634718U (en) | High-frequency induction coils for cam hardening | |
| CN207845695U (en) | A kind of whole inductor of processing sleeve fork | |
| CN104878292A (en) | Cold-rolled magnetic pole steel with yield strength not less than 400 MPa and production method of cold-rolled magnetic pole steel | |
| CN105603165A (en) | 42CrMo steel heat treatment process | |
| CN103343280B (en) | Low-temperature quenching method for medium-carbon steel workpiece | |
| CN201420089Y (en) | Heat treatment equipment of soft magnetic winding iron core under transverse magnetic field | |
| CN113481352A (en) | Quenching heat treatment process for wear-resisting plate | |
| CN207276672U (en) | A kind of sensing device for self-aligning roller bearing inner ring sensing heating | |
| CN204224656U (en) | Workpiece multiaspect quenching inducer | |
| CN205874501U (en) | Excavator thrust wheel support roll way induction heating of portion frock | |
| CN210394430U (en) | Device for locally quenching push rod | |
| CN101368227A (en) | Thermal treatment method for nuclear in-pile component |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110622 |