CN101993992A - Surface heat treatment method for wheel hub unit - Google Patents
Surface heat treatment method for wheel hub unit Download PDFInfo
- Publication number
- CN101993992A CN101993992A CN2009100131026A CN200910013102A CN101993992A CN 101993992 A CN101993992 A CN 101993992A CN 2009100131026 A CN2009100131026 A CN 2009100131026A CN 200910013102 A CN200910013102 A CN 200910013102A CN 101993992 A CN101993992 A CN 101993992A
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- CN
- China
- Prior art keywords
- heat treatment
- wheel hub
- heat treating
- surface heat
- hub
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- 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.)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention relates to a surface heat treatment method for a wheel hub unit of an automobile, and discloses a surface heat treatment process method which is the key process for manufacturing the wheel hub unit. The surface heat treatment method for the wheel hub unit is characterized by comprising the following steps of: putting a workpiece to be quenched into an intermediate frequency quenching induction heating furnace; heating by using an intermediate frequency induction heater; and quenching by a high-power, short-time and internal water spraying method.
Description
Technical field:
The present invention relates to a kind of wheel load cell surface heat treating method that is used on the automobile.
Background technology:
Hub is the high technology content of developing in recent years, the auto-parts of high added value.It is automotive field new growth engines and developing direction, succeeding in developing of the third generation hub that particularly global at present maximum auto parts machinery supplier DELPffi produces, the hub production domesticization has become the task of top priority, and the surface heat processing is the critical process that hub is made; Complex-shaped because of its piece surface, so the thermal treatment process difficulty is big, it is high to require, and becomes the critical process that this project is developed.
The key position performance requriements of hub: flange root quench-hardened case diameter reaches the requirement of Φ 64～74; Penetration of hardness DS=2.25～2.40; Hardened layer hardness is HRC58～64; Ditch is directly located depth of hardening zone DS=2.45～3.60, and hardened layer hardness is HRC60～64; Diameter place: depth of hardening zone DS=1.0～2.0, hardened layer hardness is greater than HRC45; The minimum 6mm of being of the distance of not hardening.The part head is very thin, easily heat penetration; Two step wedge angles and head seamed edge are overheated easily; The flange root filtrating area (raceway groove) different with diameter is to be difficult for heating region, and requires darker quench-hardened case; Whole surface requirements once heats quenches simultaneously and obtains the successive hardened layer; By above critical technological point analysis as can be known: adopting traditional quenching technology for surfaces and heating principle commonly used is to be difficult to reach requirement.
Summary of the invention:
The objective of the invention is to overcome the prior art above shortcomings, the heat treating method on a kind of hub surface is provided, its main points are that workpiece to be quenched is put into the medium frequency quenching induction heater for the firm unit of wheel critical surfaces heat treating method, by medium frequency induction heater heating, adopts high-power, short period of time, the quenching of interior water spray means.
Beneficial effect of the present invention:
1, utilizes the thermal treatment process characteristics of medium frequency quenching induction heating, reached the course of processing that workpiece dimension is done corresponding change, convenient being suitable for;
2, the thermal treatment process of medium frequency quenching induction heating all can obtain the ideal quench-hardened case to the step transition district and the ring flange root of the different diameters of axle of workpiece;
3, the thermal treatment process of medium frequency quenching induction heating is not high to quenching machine and part clamp accuracy requirement.
Description of drawings:
Fig. 1 is the graph of a relation of quench-hardened case and heat-up time.
Embodiment:
Taking turns firm unit critical surfaces heat treating method is that workpiece to be quenched is put into the medium frequency quenching induction heater, by medium frequency induction heater heating, adopts high-power, short period of time, interior water spray means quenching technology.
Technological process:
According to the graph of a relation (see figure 1) of quench-hardened case and heat-up time, find: during DS=23mm, be 3.3 seconds (GB requires not too wide zone of transition of quench-hardened case core metal, and will lack selected heat-up time) corresponding heat-up time, part heating total power consumption the best.Hard surfacing adopts intermediate frequency power supply more suitable.Therefore plant capacity is selected to be greater than 130kw, and promptly equipment choosing power 130kw or 180hiv all can.
For ensureing that each position of heated parts comprises ring flange root, raceway groove (step axle zone of transition), excircle of workpiece surface homogeneous heating, interior water spray means is to adopt from the head of hub and the endoporus refrigerative technological measure of taking to spray water.
Reach the drawing requirement fully and meet GB standard HTS004 through the quality inspection result.(, and there is not the induction quenching metallographic examination standard of 1070 steel correspondences at present because GB standard HTS004 metallographic structure does not have classification; Applicability of standard: the mechanical component that medium carbon structure iron and medium carbon structural alloy steel are made, the check of metallographic structure and effective case depth behind height, mid-frequency induction hardening.)
Claims (3)
1. the heat treating method on hub surface, this method comprises the mid-frequency induction hardening stove, it is characterized in that taking turns firm cell surface heat treating method, be that workpiece to be quenched is put into the medium frequency quenching induction heater, by medium frequency induction heater heating, adopts high-power, short period of time, the quenching of interior water spray means.
2. the heat treating method on hub according to claim 1 surface is characterized in that, described plant capacity is selected to be greater than 130kw, and promptly equipment choosing power 130kw or 180hiv all can.
3. the heat treating method on hub according to claim 1 surface is characterized in that, interior water spray means is to adopt from the head of hub and the endoporus refrigerative technological measure of taking to spray water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100131026A CN101993992A (en) | 2009-08-13 | 2009-08-13 | Surface heat treatment method for wheel hub unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100131026A CN101993992A (en) | 2009-08-13 | 2009-08-13 | Surface heat treatment method for wheel hub unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101993992A true CN101993992A (en) | 2011-03-30 |
Family
ID=43784741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100131026A Pending CN101993992A (en) | 2009-08-13 | 2009-08-13 | Surface heat treatment method for wheel hub unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101993992A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105296736A (en) * | 2014-05-27 | 2016-02-03 | Skf公司 | Induction heating device |
| CN105567930A (en) * | 2014-10-11 | 2016-05-11 | 广东富华重工制造有限公司 | Trailer axle high-strength spindle head quenching technology |
| JP2021519587A (en) * | 2018-03-30 | 2021-08-12 | ユニバーシティ オブ ジュネーブ | MicroRNA expression constructs and their use |
-
2009
- 2009-08-13 CN CN2009100131026A patent/CN101993992A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105296736A (en) * | 2014-05-27 | 2016-02-03 | Skf公司 | Induction heating device |
| US10383180B2 (en) | 2014-05-27 | 2019-08-13 | Aktiebolaget Skf | Inductor device, in particular for hardening rolling tracks of an outer ring of a vehicle hub bearing unit |
| CN105296736B (en) * | 2014-05-27 | 2020-12-01 | Skf公司 | Induction heating apparatus |
| CN105567930A (en) * | 2014-10-11 | 2016-05-11 | 广东富华重工制造有限公司 | Trailer axle high-strength spindle head quenching technology |
| JP2021519587A (en) * | 2018-03-30 | 2021-08-12 | ユニバーシティ オブ ジュネーブ | MicroRNA expression constructs and their use |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110330 |