CN203487198U - Gasket group for thermal treatment on gear hub - Google Patents
Gasket group for thermal treatment on gear hub Download PDFInfo
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- CN203487198U CN203487198U CN201320478089.3U CN201320478089U CN203487198U CN 203487198 U CN203487198 U CN 203487198U CN 201320478089 U CN201320478089 U CN 201320478089U CN 203487198 U CN203487198 U CN 203487198U
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- washer
- thermal treatment
- gasket
- tooth hub
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Abstract
The utility model provides a gasket group for thermal treatment on a gear hub. The gasket group comprises an inner workpiece bearing gasket and an outer workpiece gasket sleeved on the outer side of the inner workpiece bearing gasket, wherein a gap is formed between the inner workpiece bearing gasket and the outer workpiece gasket; the inner workpiece bearing gasket is contacted with the gear hub above; a gap is formed between the outer workpiece gasket and the end surface of an external spline. The gasket group is applied to a thermal treatment process of the gear hub, under the conditions of uniform overall carburized layer and good metallographic structure, the deformation of the workpiece after carburizing and quenching is effectively reduced, and through curing thermal treatment parameters, the precision of a finished product of the workpiece is improved.
Description
Technical field
The utility model belongs to metal heat treatmet technical field, relates to a kind of thermal treatment washer sets of tooth 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 thermal treatment washer sets of tooth 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 thermal treatment washer sets of tooth hub, comprise workpiece load-bearing inner washer and the workpiece outer washer that is sheathed on described workpiece load-bearing inner washer outside, between described workpiece load-bearing inner washer and described workpiece outer washer, have spacing;
Described workpiece load-bearing inner washer contacts with the tooth hub of the side of being located thereon, and between described workpiece outer washer and the male spline end face of described tooth hub, has gap.
The utility model can also adopt following technical measures:
Described workpiece load-bearing inner washer contacts with the kickboard of described tooth hub.Described kickboard is the position of described tooth hub thickness and weight maximum.
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.
Advantage and the positively effect that the utlity model has are: the utility model is for the thermal treatment process of tooth hub, make workpiece guarantee that whole cementation zone is even, in the good situation of metallographic structure, by using after inside and outside two kinds of packing rings balanced work-piece cools speed effectively to reduce heat treatment deformation with this, solidify some heat treatment parameters (as shove charge number of packages, temperature etc.) thus can improve, stablize the precision of workpiece.
Accompanying drawing explanation
Fig. 1 is side-view and the front view thereof of high and low shift tooth hub;
Fig. 2 is provided with the structural representation of the charging basket of washer sets for thermal 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 Fig. 2, shown in 3, the utility model provides a kind of thermal treatment washer sets of tooth hub 8, comprise workpiece load-bearing inner washer 5 and the 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 load-bearing inner washer 5 contacts with the kickboard 10 of tooth hub 8, 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 carburizing, in the middle of 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, and workpiece outer washer 6 lower ends are provided with annular outer round platform 9.
Above-mentioned thermal treatment is arranged on charging basket by washer sets.Charging basket comprises charging basket main floor 1 and five square positions 2, and charging basket main floor 1 and each square position 2 are spaced from down to up successively, and is connected by four charging basket columns 4, on charging basket main floor 1 and each square position 2, is respectively equipped with four thermal treatment 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.
The method of utilizing above-mentioned thermal treatment to feed and the tooth hub 8 packing into is heat-treated by washer sets: tooth hub 8 is placed in to each washer sets top, workpiece load-bearing inner washer 5 is contacted with the kickboard 10 of tooth hub 8, between male spline 7 end faces of workpiece outer washer 6 and tooth hub 8, have gap.A charging basket that installs tooth hub 8 was 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 each thermal treatment with in washer sets by tooth hub 8, 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.
Above-mentioned heat treating method 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 with thickness of workpiece maximum, i.e. tooth hub kickboard 10 contacts to reduce the workpiece deformation that the influence of gravity of tooth hub 8 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 is by the thermal treatment process for tooth hub by two packing rings, effectively reduced the distortion at workpiece male spline 7 positions, 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 (4)
1. a thermal treatment washer sets for tooth hub, is characterized in that: comprise workpiece load-bearing inner washer and the workpiece outer washer that is sheathed on described workpiece load-bearing inner washer outside, between described workpiece load-bearing inner washer and described workpiece outer washer, have spacing;
Described workpiece load-bearing inner washer contacts with the tooth hub of the side of being located thereon, and between described workpiece outer washer and the male spline end face of described tooth hub, has gap.
2. thermal treatment washer sets according to claim 1, is characterized in that: described workpiece load-bearing inner washer contacts with the kickboard of described tooth hub.
3. thermal treatment washer sets according to claim 1, is characterized in that: the lower end of described workpiece outer washer is provided with outer lug boss.
4. thermal treatment washer sets according to claim 3, it is characterized in that: described workpiece load-bearing inner washer and described workpiece outer washer are annular, and its center of circle coincides, the described outer lug boss that is arranged at described workpiece outer washer lower end is annular outer round platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320478089.3U CN203487198U (en) | 2013-08-05 | 2013-08-05 | Gasket group for thermal treatment on gear hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320478089.3U CN203487198U (en) | 2013-08-05 | 2013-08-05 | Gasket group for thermal treatment on gear hub |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203487198U true CN203487198U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320478089.3U Expired - Fee Related CN203487198U (en) | 2013-08-05 | 2013-08-05 | Gasket group for thermal treatment on gear hub |
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| CN (1) | CN203487198U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397161A (en) * | 2013-08-05 | 2013-11-20 | 天津天海同步科技股份有限公司 | Gasket assembly and method for heat treatment on gear hub |
| CN108994306A (en) * | 2018-07-27 | 2018-12-14 | 广东东睦新材料有限公司 | A kind of sinter-hardened technique of powder metallurgy synchronizer tooth hub |
-
2013
- 2013-08-05 CN CN201320478089.3U patent/CN203487198U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397161A (en) * | 2013-08-05 | 2013-11-20 | 天津天海同步科技股份有限公司 | Gasket assembly and method for heat treatment on gear hub |
| CN108994306A (en) * | 2018-07-27 | 2018-12-14 | 广东东睦新材料有限公司 | A kind of sinter-hardened technique of powder metallurgy synchronizer tooth hub |
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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: 20180805 |