CN103397147B - Surface processing method for washing machine tripod shaft - Google Patents
Surface processing method for washing machine tripod shaft Download PDFInfo
- Publication number
- CN103397147B CN103397147B CN201310372661.2A CN201310372661A CN103397147B CN 103397147 B CN103397147 B CN 103397147B CN 201310372661 A CN201310372661 A CN 201310372661A CN 103397147 B CN103397147 B CN 103397147B
- Authority
- CN
- China
- Prior art keywords
- washing machine
- quenching
- tripod shaft
- processing method
- surface processing
- 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.)
- Active
Links
Classifications
-
- 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
Landscapes
- Heat Treatment Of Articles (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a surface processing method for a washing machine tripod shaft, which is used for carrying out high-frequency heat treatment on a bearing guard on the washing machine tripod shaft. The surface processing method comprises the following steps of firstly, quenching by adopting a high frequency quenching machine, wherein the anode voltage of the high frequency quenching machine is 8000V and the anode current of the high frequency quenching machine is 3.2A-3.3A, the frequency conversion frequency is 1400-1420, the feeding amount is 300mm/min and the effective time is 6.0 seconds; and then, carrying out tempering treatment on the bearing guard which is quenched, wherein the tempering current is 25A, the temperature is 300+/-3 DEG C, the time is 2+/-0.5 hours and a cooling manner is an air cooling manner. The surface processing method disclosed by the invention is simple in process and convenient to process; the after-sale maintenance cost of washing machine factories is reduced and the surface processing method is convenient to use.
Description
Technical field
The present invention relates to the process of surface treatment of axle head bearing gear.
Background technology
Washing machine there will be larger abnormal sound after use in a few years, and even during cleaning and dewatering, shake is serious, has reason to be greatly after bearing and beam warp cross use, and tolerance clearance becomes large, causes friction to become large.
Summary of the invention
The technical problem to be solved in the present invention is that existing washing machine there will be larger abnormal sound after use in a few years, and even during cleaning and dewatering, shake is serious.
For solving the problems of the technologies described above, the technical solution used in the present invention is: washing machine tripod shaft surface treatment method, high frequency heat process is carried out to the bearing gear in washing machine tripod shaft, comprise the following steps: quenching: adopt high-frequency hardening machine to quench, the anode voltage of described high-frequency hardening machine is 8000V, and anodic current is 3.2A ~ 3.3A, and conversion frequencies is 1400 ~ 1420, the amount of feed is 300mm/min, and working lipe is 6.0S; Tempering: the bearing gear complete to quenching carries out temper, and the electric current of described tempering is 25A, and temperature is 300 DEG C ± 3, and the time is 2Hr ± 0.5, and the type of cooling is air-cooled type.
The present invention, by improving surface hardness and the wear resistance of bearing gear, avoids washing machine to use rear axle wearing and tearing through long-time, and the gap of bearing and axle is become cause greatly that washing machine is beated, noise etc.; The washing machine tripod shaft obtained after the present invention's processing, from washing machine tripod shaft surface inwardly degree of depth 0.1mm, adopt HV hardness measurement, hardness value can reach 400 ~ 520 (HRC40 ~ 50); Washing machine normal service life is 3000h, and the weight that the present invention processes the formal load criteria of rear final assembly is normally done washing running fatigue test 3000h, has no abnormal sound in whole process, tear machine testing bearing gear size open and wearing and tearing unchanged.The present invention can reduce the after-sales service cost of washing machine manufacturer, the use that human consumer also can be satisfactory, not because repairing the problem that can not repair once and worried, causes the inconvenience of use.
As a modification of the present invention scheme, before quenching, bearing gear need leave the fine grinding surplus of 0.15mm-0.25mm, after tempering, then bearing is kept off ground finish to requiring size.Because the process of quenching can cause washing machine tripod shaft that certain deformation occurs, therefore, before quenching, set certain fine grinding surplus, be machined to time in the end and require size, can ensure that the precision of part is higher.
For ensureing the abrasion resistant effect that bearing keeps off further, saving production cost simultaneously, implementing the heat treated processing layer thickness of high frequency 1 ~ 2mm.
For ensureing quenching effect, quenching scope is more than or equal to bearing gear areal extent, and cooling range is more than or equal to quenching scope.
Advantage of the present invention is: technique is simple, be convenient to process operation, by high-frequency quenching is referred in tripod shaft, improve surface hardness and wear resistance, decrease the after-sales service cost of washing machine manufacturer, human consumer also can be satisfactory use, not because the problem that can not repair can be repaiied once and worried, cause the inconvenience of use.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
The present invention is by carrying out high frequency heat process to the bearing gear in washing machine tripod shaft, solve because the tolerance clearance of bearing and axle becomes large through using friction, there is larger abnormal sound in the washing machine caused, even shake serious problem during cleaning and dewatering, present method comprises the following steps: quenching: adopt high-frequency hardening machine to quench, the anode voltage of described high-frequency hardening machine is 8000V, anodic current is 3.2A ~ 3.3A, conversion frequencies is 1400 ~ 1420, the amount of feed is 300mm/min, working lipe is 6.0S, implementing the heat treated processing layer thickness of high frequency is 1 ~ 2mm, tempering: the bearing gear complete to quenching carries out temper, and the electric current of described tempering is 25A, and temperature is 300 DEG C ± 3, and the time is 2Hr ± 0.5, and the type of cooling is air-cooled type.
Because quenching has certain deflection, bearing gear need leave about 0.2mm and refine surplus, then carries out high-frequency quenching, and the ground finish of last bearing gear is to requiring size.
Product of the present invention adopts the situation of HV hardness measurement to be that the degree of depth 0.1mm place from outward appearance is measured, and reaches 400 ~ 520 (HRC40 ~ 50) and namely meets the requirements.
For ensureing the effect of quenching, quenching scope is more than or equal to bearing gear areal extent, and cooling range is more than or equal to quenching scope.When the scope of quenching is less than bearing gear areal extent, when cooling range is less than quenching scope, bearing blocks the place that will exist and not be heat-treated or the place be not cooled to, this can cause when using wearing and tearing, there are otherness wearing and tearing, between quenching and not quenching, that line of delimitation is exactly stress point, and distortion or fracture may appear in axle.
Existing washing machine normal service life 3000h, the weight of the formal load criteria of the complete rear final assembly of this Product processing is normally done washing and is operated fatigue test 3000h, has no abnormal sound in whole process, tears machine testing bearing gear size open and weares and teares unchanged.
As shown in Figure 1, quenching process is as shown in the table:
| Project | The right bearing gear | Left side bearing gear | Remarks |
| Heating starting position | A | C | |
| Heating dwell times | 0.5 second | 0.5 second | |
| Cooling trigger | 1.5 second | 1.5 second | Heating starts rear time delay |
| Heating closed position | B | D | |
| Cooling closed position | B+5mm | D+5mm | |
| Cooling stops time delay | 1.5 second | 1.5 second | |
| Heating output intensity | 67％ | 65％ | Adjustable in reference value 5% |
| Translational speed during heating | 80 mm/second | 80 mm/second |
| Translational speed after cooling | 500 mm/second | 500 mm/second |
The high-frequency hardening machine heating power of different model is different, the per-cent of aforementioned heating output intensity gets the per-cent of quenching press rated output, this percent value need be drawn by manual testing, namely whether reaches requirement by detection axis bearing surface hardness and adjusts per-cent parameter.
Claims (4)
1. washing machine tripod shaft surface treatment method, is characterized in that, carries out high frequency heat process, comprise the following steps the bearing gear in washing machine tripod shaft:
Quenching: adopt high-frequency hardening machine to quench, the anode voltage of described high-frequency hardening machine is 8000V, and anodic current is 3.2A ~ 3.3A, and conversion frequencies is 1400 ~ 1420, and the amount of feed is 300mm/min, and working lipe is 6.0S;
Tempering: the bearing gear complete to quenching carries out temper, and the electric current of described tempering is 25A, and temperature is 300 DEG C ± 3, and the time is 2Hr ± 0.5, and the type of cooling is air-cooled type.
2. washing machine tripod shaft surface treatment method according to claim 1, is characterized in that, before quenching, bearing gear need leave the fine grinding surplus of 0.15mm-0.25mm, after tempering, then bearing is kept off ground finish to requiring size.
3. washing machine tripod shaft surface treatment method according to claim 1 and 2, is characterized in that, implements the heat treated processing layer thickness of high frequency 1 ~ 2mm.
4. washing machine tripod shaft surface treatment method according to claim 1 and 2, is characterized in that, quenching scope is more than or equal to bearing gear areal extent, and cooling range is more than or equal to quenching scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310372661.2A CN103397147B (en) | 2013-08-23 | 2013-08-23 | Surface processing method for washing machine tripod shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310372661.2A CN103397147B (en) | 2013-08-23 | 2013-08-23 | Surface processing method for washing machine tripod shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103397147A CN103397147A (en) | 2013-11-20 |
| CN103397147B true CN103397147B (en) | 2015-07-22 |
Family
ID=49560845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310372661.2A Active CN103397147B (en) | 2013-08-23 | 2013-08-23 | Surface processing method for washing machine tripod shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103397147B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01222020A (en) * | 1988-03-02 | 1989-09-05 | Kioritz Corp | Method for adjusting hardness of metal material |
| JP2000002251A (en) * | 1998-06-12 | 2000-01-07 | Nippon Seiko Kk | Conical roller bearing |
| CN1203256C (en) * | 2002-12-19 | 2005-05-25 | 牛君 | Method for making environment protection type stainless steel oil pump |
| CN1940095A (en) * | 2005-10-01 | 2007-04-04 | 扬动股份有限公司 | Heat treatment of cam shaft for diesel engine |
| CN101633249A (en) * | 2009-06-03 | 2010-01-27 | 敦化市亚联机械制造有限公司 | Hollow optical axis in double-steel belt pressing machine and processing technique thereof |
-
2013
- 2013-08-23 CN CN201310372661.2A patent/CN103397147B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103397147A (en) | 2013-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103131834B (en) | Spring steel wire processing process for increasing fatigue performance of high strength spring steel wire | |
| CN104057002B (en) | A kind of compression spring processing process | |
| CN101642868B (en) | Technique for processing suspension spring | |
| CN105643219A (en) | Machining technology for gear shaft | |
| CN105364433A (en) | Hot-working die production technology | |
| CN104195450A (en) | Heat treatment method of cold-rolled working roll with high wear resistance and roll mark resistance | |
| CN105671252A (en) | One-time forging and pressing molding waste heat hardening and tempering technology for automobile front axle | |
| CN103397147B (en) | Surface processing method for washing machine tripod shaft | |
| CN105666071A (en) | Machining technique for transmission shaft | |
| CN101787427B (en) | Crankshaft fillet quenching method | |
| CN105689967A (en) | Machining method for machine tool spindle part | |
| CN203023311U (en) | Loom shaft head bushing of air-jet loom | |
| CN104439976A (en) | Machining process for disc spring used for forging press | |
| JP5682161B2 (en) | Manufacturing method of rolling sliding member | |
| CN104388660A (en) | Rolling bearing heat treatment technique | |
| CN103316918A (en) | Novel composite hot roller and manufacturing method thereof | |
| CN109128708A (en) | A kind of thrust wheel wheel shaft processing method | |
| CN110216421A (en) | A kind of processing method of gland | |
| CN104328265A (en) | Quenching process for bearing ring raceway | |
| CN103710516A (en) | Large-diameter small-modulus gear quenching process | |
| CN105755262A (en) | Lathe main shaft heat treatment process | |
| CN101885135B (en) | Method for manufacturing hammer shaft of single-stage hammer crusher | |
| CN105666046A (en) | Machining method for steering knuckle | |
| CN106868279A (en) | A kind of elimination 20CrMnTiH residual forging heats isothermal normalizing produces the Technology for Heating Processing of acicular ferrite | |
| CN109262203B (en) | Preparation method of impact-resistant alloy tool steel ball |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |