CN203487242U - Charging basket for thermal treatment of synchronizer gear hub - Google Patents
Charging basket for thermal treatment of synchronizer gear hub Download PDFInfo
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- CN203487242U CN203487242U CN201320478090.6U CN201320478090U CN203487242U CN 203487242 U CN203487242 U CN 203487242U CN 201320478090 U CN201320478090 U CN 201320478090U CN 203487242 U CN203487242 U CN 203487242U
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Abstract
The utility model provides a charging basket for thermal treatment of a synchronizer gear hub. The charging basket comprises a charging basket main soleplate and a work-piece gasket group arranged on the charging basket main soleplate, wherein the work-piece gasket group comprises an inner work-piece bearing gasket and an outer work-piece gasket, and the outer side of the inner work-piece bearing gasket is sleeved with the outer work-piece gasket; a gap is formed between the inner work-piece bearing gasket and the outer work-piece gasket. When the hub to be treated is put above the work-piece gasket group, the inner work-piece bearing gasket is in contact with the hub above the inner work-piece bearing gasket, and a gap is formed between the outer work-piece gasket and the male spline end surface of the hub. By adopting a thermal treatment process of the synchronizer gear hub, the deformation of a work-piece after being carburized and quenched is effectively reduced while the whole carburized layer is even and a metallographic structure is good, so that the precision of the finished product of the work-piece is increased and the effect of the charging basket after long term usage is good.
Description
Technical field
The utility model belongs to metal heat treatmet technical field, relates to a kind of material basket for heat treatment of synchromesh gear hub.
Background technology
For the carburizing and quenching of high to low gear toothholder in heavy type lorry transmission-gear box synchronizer product, process the basic case-hardening furnace that adopts at present and carry out, its charging mode can be selected the mode of mounting or paperback mode.But for the workpiece shown in Fig. 1, the distortion after its carburizing and quenching is all very serious for a long time.Be mainly reflected in and adopt the ovality of workpiece while mounting overproof serious, and while adopting flat granting, the planeness of workpiece is overproof serious, especially the male spline of workpiece can the very large tapering of bad student, and when serious, tapering surpasses more than 0.50.Not obvious by effect after adjusting heat treatment parameter for above situation.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of material basket for heat treatment of synchromesh gear hub, is especially suitable for the thermal treatment process of high and low shift tooth hub in counterweight card Synchromous device of gearbox.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of material basket for heat treatment of synchromesh gear hub, comprises charging basket main floor and be arranged on the workpiece washer sets on described charging basket main floor; Described workpiece washer sets comprises workpiece load-bearing inner washer and is sheathed on the workpiece outer washer in described workpiece load-bearing inner washer outside, between described workpiece load-bearing inner washer and described workpiece outer washer, has spacing.In the time of above pending tooth hub is placed in described workpiece washer sets, described workpiece load-bearing inner washer is contacted with the kickboard of the tooth hub of the side of being located thereon, between described workpiece outer washer and the male spline end face of described tooth hub, have gap.
The utility model can also adopt following technical measures:
Described material basket for heat treatment also comprises an above square position, and described charging basket main floor is spaced from down to up successively with square position described in each, and is connected by an above charging basket column, is respectively equipped with the above workpiece washer sets described in each on square position.
The lower end of described workpiece outer washer is provided with outer lug boss.
Described workpiece load-bearing inner washer and described workpiece outer washer are annular, and its center of circle coincides, and the described outer lug boss that is arranged at described workpiece outer washer lower end is annular outer round platform.
The quantity of described charging basket column is 4, on square position described in described charging basket main floor and each, between every two adjacent described charging basket columns, is equipped with charging basket coaming plate, described charging basket main floor and described in each each charging basket coaming plate on square position surround respectively rectangle.
The quantity that is arranged at the described workpiece washer sets on square position described in described charging basket main floor and each is respectively four.
Described square position quantity is five.
Advantage and the positively effect that the utlity model has are: the utility model adopts workpiece washer sets structure, in the heat treatment process of synchromesh gear hub, make workpiece guarantee that whole cementation zone is even, in the good situation of metallographic structure, effectively reduce the deflection after workpiece carbonization quenches, thereby improved the finished product accuracy of the type workpiece, and respond well after described charging basket life-time service.
Accompanying drawing explanation
Fig. 1 is side-view and the front view thereof of synchromesh gear hub;
Fig. 2 is the structural representation of material basket for heat treatment described in the utility model embodiment;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is the part enlarged diagram of tooth hub in Fig. 2, workpiece outer washer and workpiece load-bearing inner washer.
In figure:
1, charging basket main floor 2, square position 3, charging basket coaming plate 4, charging basket column
5, workpiece load-bearing inner washer 6, workpiece outer washer 7, male spline
8, tooth hub 9, annular outer round platform 10, kickboard
Embodiment
As shown in Figure 2,3, the utility model provides a kind of material basket for heat treatment of synchromesh gear hub 8, comprise charging basket main floor 1 and five square positions 2, charging basket main floor 1 and each square position 2 are spaced from down to up successively, and be connected by 4 charging basket columns 4, on charging basket main floor 1 and each square position 2, be respectively equipped with four workpiece washer sets.On charging basket main floor 1 and each square position 2, between every two adjacent charging basket columns 4, be equipped with charging basket coaming plate 3, and surround rectangle.
Workpiece washer sets comprises a workpiece load-bearing inner washer 5 and a workpiece outer washer 6 that is sheathed on workpiece load-bearing inner washer 5 outsides, between workpiece load-bearing inner washer 5 and workpiece outer washer 6, there is spacing, and after making tooth hub 8 be placed on workpiece load-bearing inner washer 5, workpiece outer washer 6 is that gap is left at the seam plane of major diameter packing ring and the male spline of tooth hub 87 tooth positions, thereby in the middle of carburizing, quenching process, can effectively reduce the impact of gravity on this tooth position distortion.Workpiece load-bearing inner washer 5 and workpiece outer washer 6 are annular, and its center of circle coincides.The lower end of workpiece outer washer is provided with annular outer round platform 9.
The method of utilizing the charging of above-mentioned charging basket and the synchromesh gear hub 8 packing into being heat-treated is as follows: a charging basket that installs tooth hub 8 put into carburizing tinuous production in every 34 minutes and heat-treats, specifically comprise the following steps,
(1) tooth hub structure as shown in Figure 1, lies in tooth hub 8 in each workpiece washer sets, and tooth hub 8 is not directly contacted with charging basket main floor 1 and each square position 2;
(2) debinding furnace of charged charging basket in step (1) being put into carburizing tinuous production carries out preheating, degreasing, and preheating temperature is 360-380 ℃; In debinding furnace, have 4 basket positions, be 34 minutes * 4=136 minute warm up time;
(3) put into main stove and carry out carburizing, carburizing temperature is 880-890 ℃; In main stove, have 16 basket positions, carburizing time is 34 minutes * 16=544 minute, and carbon potential is 1.0-1.05;
(4) after carburizing, tooth hub 8 is quenched, quenching temperature is 800-810 ℃, and the cool time is 10-12 minute;
(5) utilize cleaning machine to clean;
(6) put into tempering stove tempering, tempering temperature is 170-180 ℃; In tempering stove, have 6 basket positions, tempering time is 34 * 6=204 minute;
(7) discharging.
Workpiece washer sets comprises a workpiece load-bearing inner washer 5 and a workpiece outer washer 6 that is sheathed on workpiece load-bearing inner washer 5 outsides, the lower end of workpiece outer washer 6 is provided with annular outer round platform 9, workpiece load-bearing inner washer 5 directly contacts with the kickboard 10 of tooth hub 8, between male spline 7 end faces of the tooth hub 8 of workpiece outer washer 6 and the side of being located thereon, has gap.Charging basket comprises six layers that a charging basket main floor 1 and five square positions 2, consist of, and wherein every layer is equipped with respectively four tooth hubs 8.
This utility model is by utilizing workpiece load-bearing inner washer 5 and workpiece outer washer 6 to feed, during high temperature carburizing, workpiece load-bearing inner washer 5 is by the position the strongest with thickness of workpiece, i.e. tooth hub kickboard 10 contacts to reduce the workpiece deformation that the influence of gravity of tooth hub causes.Meanwhile, under the effect of workpiece load-bearing inner washer 5, tooth hub is not directly contacted with workpiece outer washer 6.During quenching, quenching oil is from charging basket below to cocycle, the liquidity of quenching oil when workpiece outer washer 6 can reduce workpiece quenching, annular outer round platform 9 can further reduce with it approaching workpiece position, be the speed of cooling of tooth hub male spline, thus the cooling equilibrium degree of balanced workpiece male spline 7.
The utility model has reduced the distortion at workpiece male spline 7 positions effectively by the effect of two packing rings, utilize the atmosphere good fluidity of carburizing tinuous production, the feature that quenching tank oil reserve is large, speed of cooling is stable simultaneously, can select the key process parameters such as lower carburizing temperature and quenching temperature.Make workpiece guarantee that whole cementation zone is even, in the good situation of metallographic structure, by reducing the processing parameters such as the carburizing temperature of workpiece and quenching temperature, effectively weaken the deflection after workpiece carbonization quenches, thereby improved the finished product accuracy of the type workpiece.
Above-mentioned tooth hub 8 is 16MnCr5H workpiece, 8 grades of accuracy requirements.Adopt the metallographic result of the tooth hub 8 after the method processing: workpiece surface hardness HRA80-83, effectively hardened layer is controlled between 0.65-0.8.Martensite and paralympic 1-4 level, carbide 1-4 level, the ferrite 1-4 of heart portion level.After thermal treatment, workpiece external tooth precision meets 8 class precisions.
Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variations of doing according to the utility model application range and improvement etc., within all should still belonging to patent covering scope of the present utility model.
Claims (7)
1. a material basket for heat treatment for synchromesh gear hub, is characterized in that: comprise charging basket main floor and be arranged on the workpiece washer sets on described charging basket main floor;
Described workpiece washer sets comprises workpiece load-bearing inner washer and is sheathed on the workpiece outer washer in described workpiece load-bearing inner washer outside, between described workpiece load-bearing inner washer and described workpiece outer washer, has spacing.
2. material basket for heat treatment according to claim 1, it is characterized in that: described material basket for heat treatment also comprises an above square position, described charging basket main floor is spaced from down to up successively with square position described in each, and be connected by an above charging basket column, described in each, on square position, be respectively equipped with the above workpiece washer sets.
3. material basket for heat treatment according to claim 1 and 2, is characterized in that: the lower end of described workpiece outer washer is provided with outer lug boss.
4. material basket for heat treatment according to claim 3, is characterized in that: described workpiece load-bearing inner washer and described workpiece outer washer are annular, and its center of circle coincides, and the described outer lug boss that is arranged at described workpiece outer washer lower end is annular outer round platform.
5. material basket for heat treatment according to claim 2, is characterized in that: the quantity of described charging basket column is 4, on square position described in described charging basket main floor and each, between every two adjacent described charging basket columns, is equipped with charging basket coaming plate.
6. according to the material basket for heat treatment described in claim 2 or 5, it is characterized in that: the quantity that is arranged at the described workpiece washer sets on square position described in described charging basket main floor and each is respectively four.
7. according to the material basket for heat treatment described in claim 2 or 5, it is characterized in that: described square position quantity is five.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320478090.6U CN203487242U (en) | 2013-08-05 | 2013-08-05 | Charging basket for thermal treatment of synchronizer gear hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320478090.6U CN203487242U (en) | 2013-08-05 | 2013-08-05 | Charging basket for thermal treatment of synchronizer gear hub |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203487242U true CN203487242U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320478090.6U Expired - Fee Related CN203487242U (en) | 2013-08-05 | 2013-08-05 | Charging basket for thermal treatment of synchronizer gear hub |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203487242U (en) |
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2013
- 2013-08-05 CN CN201320478090.6U patent/CN203487242U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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: 20140319 Termination date: 20160805 |