CN102689144B - Chemical treatment and processing method of overrunning clutch wedge - Google Patents
Chemical treatment and processing method of overrunning clutch wedge Download PDFInfo
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- CN102689144B CN102689144B CN201210182382.5A CN201210182382A CN102689144B CN 102689144 B CN102689144 B CN 102689144B CN 201210182382 A CN201210182382 A CN 201210182382A CN 102689144 B CN102689144 B CN 102689144B
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Abstract
The invention relates to an overrunning clutch, and in particular relates to a chemical treatment and processing method of an overrunning clutch wedge... The wedge provided by the invention has high production precision so as to prolong the service life of the clutch. The method comprises the following steps of: carrying out cold drawing and cutting to produce a wedge with the margin being 0.02-0.04mm on the single side by using ball bearing steel; polishing after vacuum hardening and tempering, and removing the oil stain and edge on the surface; carrying out acid corrosion on the wedge; disacidifying the wedge after acid corrosion; carrying out rustproof treatment; and molding the wedge after rustproof treatment by using an extruder, thus finishing the chemical treatment and processing of the overrunning clutch wedge.
Description
Technical field
The present invention relates to a kind of freewheel clutch, especially relate to a kind of chemical treatment and processing method of freewheel clutch voussoir.
Background technology
Wedge type over running clutch is a kind of device of unidirectional delivery power, is widely used in the intermittent drive mechanism of aircraft, tank, military trucks, offroad vehicle, lathe, textile machine, automatic assembly line etc.Existing Wedge type over running clutch comprises interior ring, the outer shroud with slideway, is provided with special-shaped fixture block (being voussoir) and the retainer with spring between interior external slideway.
Wherein voussoir is extremely important parts in Wedge type over running clutch, in the transmission of clutch, plays an important role.Its accuracy of manufacture and intensity are on all producing important impact the service life of whole freewheel clutch.Traditional voussoir processes (see document: " Wedge type over running clutch is in the application of loading machine gearbox " periodical: building machinery, classification number: TH243) by cold-drawn, cut-out, heat treatment, polishing four procedures; Wherein cold-drawn, this two procedures of heat treatment can produce larger error to the accuracy of manufacture of voussoir owing to expanding with heat and contract with cold, and polishing is carried out on heat treated basis, has more caused error accumulation, makes the voussoir of producing be difficult to meet the requirement of product.
Summary of the invention
Technical problem to be solved by this invention is, the deficiency existing for existing method for processing wedge block, thus a kind of chemical treatment and processing method that makes voussoir have the higher accuracy of manufacture to improve the freewheel clutch voussoir in clutch service life is provided.
The present invention includes following steps:
1) use bearing steel (GCr15), produce and monolaterally leave the voussoir that surplus is 0.02～0.04mm through cold-drawn, after cutting off, then polishing after vacuum hardening, tempering, remove surface and oil contaminant and corner angle;
2) voussoir is carried out to acid corrosion processing;
3) voussoir after treatment acid corrosion is carried out to disacidify processing;
4) carry out again antirust processing;
5) adopt extruder to make it pass through mould antirust voussoir after treatment, complete chemical treatment and the processing of freewheel clutch voussoir.
In step 1), described polishing, can adopt light polishing machine polishing 20～40min, and the hardness after vacuum hardening, tempering reaches HRC60 ~ 64.
In step 2) in, described acid can adopt hydrochloric acid etc., and the method for described acid corrosion processing can be: select the acid that under normal temperature, concentration is 20%～40% to import in sour pond, voussoir is put into surface and have the cylinder of grid hollow out, cylinder is immersed in acid, and starter motor, rotates cylinder; The whole process time of described acid corrosion processing can be 1～3h.
In step 3), described in go acid-treated concrete grammar can be: sour pond is inserted in hot water, then semi-finished product are put into surface has the cylinder of grid hollow out, then cylinder is immersed in hot water; Starter motor, rotates cylinder; The temperature of described hot water can be 40 ~ 80 DEG C, describedly again semi-finished product is put into surface and have the cylinder of grid hollow out, preferably flood in cylinder all voussoirs with hot water and be as the criterion, described in go acid-treated whole process time to can be 30 ~ 60min.
In step 4), the concrete grammar of described antirust processing can be: semi-finished product after treatment disacidify are put into centrifuge and dry, first the semi-finished product after drying are put into mixer, then add antirust oil, stir.
In step 5), described mould can adopt taking wolfram steel as raw-material mould.
The dimensional accuracy of the voussoir obtaining and surface roughness are close to the precision of mould, and more than dimensional accuracy reaches IT6, surface roughness reaches
The present invention, on existing manufacturing process basis, has designed two procedures in addition, comprises acid corrosion processing and mould extrusion modling.Because reaching 60 to 64, voussoir hardness HRC after Overheating Treatment is difficult to directly by mould extrusion modling, therefore the present invention takes the voussoir after heat treatment to carry out acid corrosion processing, thereby makes formation a large amount of uniform small pits in voussoir surface reduce the net sectional area of voussoir.Because hcl corrosion voussoir net sectional area after treatment is slightly less than the sectional area of mould, so voussoir can pass through mould smoothly through extruding.The mould that the present invention uses is taking wolfram steel as raw material, forms through slow wire feeding cutting, and more than dimensional accuracy reaches IT5, surface roughness reaches
more than voussoir dimensional accuracy after its extrusion modling reaches IT6, surface roughness reaches
meet out and away the required precision of freewheel clutch, thereby improved the service life of freewheel clutch.
Brief description of the drawings
Fig. 1 is the structural representation of Wedge type over running clutch.
Fig. 2 is the voussoir schematic diagram of Wedge type over running clutch.
Fig. 3 is the hcl corrosion processing technology schematic diagram of the embodiment of the present invention.
Fig. 4 is extrusion molding dies intention of the present invention.
Detailed description of the invention
The present invention is further illustrated in connection with accompanying drawing for following examples.
Fig. 1 is the structural representation of Wedge type over running clutch.In Fig. 1, be respectively labeled as: 1 voussoir; 2 retainers; 3 external slideway; 4 inner slides; 5 interior rings; 6 outer shrouds; 7 spring bands.
Fig. 2 is the voussoir schematic diagram of Wedge type over running clutch.In Fig. 2, be labeled as: 1 voussoir.
Fig. 3 is the hcl corrosion processing technology schematic diagram of the embodiment of the present invention.In Fig. 3, be respectively labeled as: 31 cylinders (cylinder surface is that grid hollow out is so that hydrochloric acid infiltrates); 32 roller cage; 33 hydrochloric acid ponds; 34 roller shafts; 35 motors.
Fig. 4 is extrusion molding dies intention of the present invention.In Fig. 4, be respectively labeled as: 41 supporting walls; Gathering sill on 42; 43 forming tank; 44 times gathering sills.
The chemical treatment of freewheel clutch voussoir and processing method embodiment are as follows:
1, use bearing steel (GCr15), producing the monolateral surplus that leaves through cold-drawn, after cutting off is that the voussoir 1(of 0.02 ~ 0.04mm is shown in Fig. 2), reach HRC60 ~ 64 through vacuum hardening, temper number again, carry out polishing (20 ~ 40min) with light polishing machine afterwards, remove surface and oil contaminant and corner angle;
2, voussoir is carried out to hcl corrosion processing.Select the hydrochloric acid that under normal temperature, concentration is 20% ~ 40% to import in hydrochloric acid pond 33, voussoir 1 is put into surface the cylinder 31 of grid hollow out, cylinder 31 is immersed to 1/4～1/2(in hydrochloric acid and be as the criterion to flood whole voussoirs 1 in cylinder 31); Starter motor 35, rotates cylinder 31.Approximately 1～3h of whole process;
3, the voussoir after hcl corrosion is carried out to disacidify processing: hot water (40～80 DEG C) is inserted in hydrochloric acid pond 33, equally semi-finished product being put into surface has the cylinder 31 of grid hollow out, cylinder 31 is immersed to 1/4～1/2(in hot water and be as the criterion to flood whole voussoirs in cylinder); Starter motor 35, rotates cylinder 31.Whole process 30～60min;
4, carry out again antirust processing: semi-finished product after treatment disacidify are put into centrifuge and dry, first the semi-finished product after drying are put into mixer, then add antirust oil, stir;
5, adopt extruder to make it pass through mould antirust voussoir after treatment.The dimensional accuracy of acquisition voussoir and surface roughness are close to the precision of mould, and more than dimensional accuracy reaches IT6, surface roughness reaches
Claims (6)
1. the chemical treatment of freewheel clutch voussoir and processing method, is characterized in that comprising the following steps:
1) use bearing steel, produce and monolaterally leave the voussoir that surplus is 0.02～0.04mm through cold-drawn, after cutting off, then polishing after vacuum hardening, tempering, remove surface and oil contaminant and corner angle;
2) voussoir is carried out to acid corrosion processing; The method of described acid corrosion processing is: select the acid that under normal temperature, concentration is 20%～40% to import in sour pond, voussoir is put into surface the cylinder of grid hollow out, and cylinder is immersed in acid, and starter motor, rotates cylinder;
3) voussoir after treatment acid corrosion is carried out to disacidify processing; Describedly go acid-treated concrete grammar to be: hot water to be inserted in sour pond, then semi-finished product are put into surface have the cylinder of grid hollow out, then cylinder is immersed in hot water; Starter motor, rotates cylinder; Describedly again semi-finished product being put into surface and have the cylinder of grid hollow out, is to flood in cylinder all voussoirs with hot water to be as the criterion, described in to remove acid-treated whole process time be 30～60min;
4) carry out again antirust processing; The concrete grammar of described antirust processing is: semi-finished product after treatment disacidify are put into centrifuge and dry, first the semi-finished product after drying are put into mixer, then add antirust oil, stir;
5) adopt extruder to make it pass through mould antirust voussoir after treatment, complete chemical treatment and the processing of freewheel clutch voussoir.
2. the chemical treatment of freewheel clutch voussoir as claimed in claim 1 and processing method, is characterized in that in step 1) in, described polishing, is to adopt light polishing machine polishing 20～40min.
3. the chemical treatment of freewheel clutch voussoir as claimed in claim 1 and processing method, is characterized in that in step 2) in, described acid adopts hydrochloric acid.
4. the chemical treatment of freewheel clutch voussoir as claimed in claim 1 and processing method, is characterized in that in step 2) in, the whole process time of described acid corrosion processing is 1～3h.
5. the chemical treatment of freewheel clutch voussoir as claimed in claim 1 and processing method, the temperature that it is characterized in that described hot water is 40～80 DEG C.
6. the chemical treatment of freewheel clutch voussoir as claimed in claim 1 and processing method, is characterized in that in step 5) in, described mould adopts taking wolfram steel as raw-material mould.
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| CN201210182382.5A CN102689144B (en) | 2012-06-05 | 2012-06-05 | Chemical treatment and processing method of overrunning clutch wedge |
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| CN201210182382.5A CN102689144B (en) | 2012-06-05 | 2012-06-05 | Chemical treatment and processing method of overrunning clutch wedge |
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| CN102689144A CN102689144A (en) | 2012-09-26 |
| CN102689144B true CN102689144B (en) | 2014-11-05 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103192238B (en) * | 2013-04-24 | 2016-01-27 | 厦门大学 | Freewheel clutch out star wheel groove processing method |
| CN104668906B (en) * | 2015-01-29 | 2017-04-26 | 中南大学 | Manufacturing process for inclined supporting block of overrunning clutch |
| CN108246802B (en) * | 2018-03-02 | 2019-10-25 | 武汉理工大学 | A kind of milling method of freewheel clutch voussoir |
| CN109667850B (en) * | 2018-12-29 | 2021-06-22 | 潍柴动力股份有限公司 | One-way clutch for hydraulic torque converter and hydraulic torque converter |
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| CZ283308B6 (en) * | 1988-12-09 | 1998-02-18 | Železárny S. P. | Process for producing continuously heat treated wire of chrome-silicon steels |
| JPH08132127A (en) * | 1994-11-04 | 1996-05-28 | Daido Steel Co Ltd | Manufacture of cold drawn low alloy steel wire for machine structural use for carburizing hardening |
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