CN109454409A - A kind of method of highly-efficient processing carburizing and quenching steel part seal groove - Google Patents
A kind of method of highly-efficient processing carburizing and quenching steel part seal groove Download PDFInfo
- Publication number
- CN109454409A CN109454409A CN201811525048.9A CN201811525048A CN109454409A CN 109454409 A CN109454409 A CN 109454409A CN 201811525048 A CN201811525048 A CN 201811525048A CN 109454409 A CN109454409 A CN 109454409A
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- seal groove
- carburizing
- quenching
- smart car
- groove
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Mechanical Engineering (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
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Abstract
The invention discloses a kind of methods of highly-efficient processing carburizing and quenching steel part seal groove, the specific steps are as follows: (1) before part heat treatment, first rough turn seal groove, reserves machining allowance, and machining allowance is less than the carburized (case) depth of the part technical requirements；(2) the rough turn part for having seal groove is subjected to carburizing and quenching, forms carburizing and quenching layer in piece surface, the hardness of carburizing and quenching layer is between HRC58~63, and centre hardness is in HRC 30~45；(3) select the cutter smart car seal groove of energy turning carburizing and quenching layer to the final size reached in the part technical requirements.The present invention changes conventional machining process, guarantees that cutter is cut in the hardness range of HRC58~63 always when smart car seal groove, selects reasonable cutting data to guarantee cutter life and improve processing efficiency, reduce cost, guarantee processing quality.
Description
Technical field
The invention belongs to carburizing and quenching steel seal groove production technical fields, and in particular to a kind of highly-efficient processing carburizing and quenching steel
The method of part seal groove.
Background technique
Seal groove is a kind of forming tank to sealing ring offer assembly space, is played in part radial direction or end face seal
Key effect.
Currently, there are mainly two types of the sealing groove processing methods of carburizing and quenching steel part: one is using grinding method,
That is: part is regrinded after being directly ground seal groove, or first rough turn to part, heat treatment after heat treatment and cuts seal groove；It is another
It is the continuous promotion with numerically controlled lathe performance, processing seal groove directly " is ground " with vehicle generation, such as Publication No. CN1846910A
" band clasp fluted shaft set with vehicle generation mill Special purpose turning device and new process " and be published within 2013 " Information " " from
Clutch sealing slot is promoted with vehicle for grinding process " process that is proposed.
But using the first grinding method processing seal groove production efficiency it is low, manufacturing cost is high, quality be not easy it is up to standard；
Although use second method can by using PCBN cutter, sintex or cutting tool coated with hard alloy etc. realize with
Vehicle generation mill, but be not directed to cutter in these methods and how to adapt to hardness range in turning process to change big problem.Due to
Carburizing and quenching layer hardness is higher (up to HRC58~63), and for layer depth generally between 1.1~1.7mm, inner layer hardness is again lower
(HRC30~45), and seal groove is used to install sealing ring, depth requirements are typically greater than 1.7mm, this results in turning to seal
The firmness change range of workpiece to be machined material is from outward appearance to inner essence up to HRC30~63 when slot, in terms of documents and materials, there is presently no
Cutter material can be well adapted for so big firmness change range during Continuous maching.
Summary of the invention
The purpose of the present invention is propose that a kind of highly-efficient processing is seeped for the excessive feature of nonhomogeneous hardness in carburizing and quenching steel table
The method that carbon quenches steel part seal groove, not only can be improved processing efficiency, can also reduce cost, guarantee processing quality.
Inventive concept: in view of carburizing and quenching layer layer depth generally between 1.1~1.7mm, and the depth of seal groove is often
Greater than the layer depth of carburizing and quenching layer, if directly got on the bus out seal groove in part, can not be taken into account well when selecting cutting data
Cutter life and stock-removing efficiency.The present invention breaks routine techniques, and first rough turn groove width and groove depth out are respectively less than in parts to be processed
It is heat-treated after the seal groove of actual parameter again, advance reservation is less than the machining allowance of carburizing and quenching thickness degree, then can be with
Effectively avoid the problem of cutter does not adapt to firmness change.
Thus the technical solution of the present invention is as follows: a kind of method of highly-efficient processing carburizing and quenching steel part seal groove, feature
It is, the specific steps are as follows:
(1) before part heat treatment, first rough turn seal groove out reserves machining allowance, and machining allowance is less than the part technical requirements
Carburizing and quenching layer depth；
(2) the rough turn part for having seal groove is subjected to carburizing and quenching, forms carburizing and quenching layer in piece surface, carburizing is quenched
The hardness of fire bed is between HRC58~63, and centre hardness is in HRC 30~45；
(3) select the cutter smart car seal groove of energy turning carburized layer to the final size reached in the part technical requirements.
Preferably, the cutter uses the CBN cutter material of SUMITOMO CHEMICAL model BN250.
The utility model has the advantages that processing efficiency can be improved in the present invention, cost can also be reduced, guarantees processing quality.
1, using rough turn and smart car seal groove two procedures instead of be directly ground after existing heat treatment seal groove or
The technique for cutting seal groove is regrinded after first rough turn, heat treatment.
2, it directly is cut to inner layer from surface layer for grinding process for vehicle, part to be processed material hardness range is excessive (can
Up to 30~60HRC), cutter life and stock-removing efficiency can not be taken into account well when selecting cutting data.The invention can ensure that smart car
Cutter is cut in the hardness range of HRC58~63 always when seal groove, therefore can select reasonable cutting data to guarantee knife
The tool service life simultaneously improves processing efficiency.
3, the cutter uses the CBN cutter material of SUMITOMO CHEMICAL model BN250, has high rigidity, high intensity, good
The features such as fracture toughness and excellent chemical stability and low-friction coefficient, guarantees the machining accuracy of product and realizes efficiently to add
Work.
4, compared with traditional grinding: by taking the processing of certain power steering stgear rack piston seal groove as an example, comparison grinding and
The test result of turning is obtained to draw a conclusion.1) improved efficiency: grinding process averagely processes 5.5 minutes/part of beat, and turning is flat
Process 1.5 minutes/part of beat, improved efficiency 267%；2) increased quality: turning process eliminates the oil that grinding process is also easy to produce
Sealing groove phenomenon wide at the top and narrow at the bottom, better meets product requirement；3) process equipment investment reduces: ten thousand yuan of numerical control ring groove grinder 60-80/
Platform, numerically controlled lathe 30-40 ten thousand yuan/every, single device investment amount reduces by 50%；4) processing cost reduces: the process is ground work
4.28 yuan/part of skill overall cost, 2.45 yuan/part of turning process overall cost reduce comprehensive process cost 1.83 yuan/every, press
150000/year calculate, can 27.45 ten thousand yuan/year of cost declining.This highly-efficient processing carburizing and quenching steel part seal groove technology not only makes
With it is convenient, processing quality and production efficiency can also be improved, reduce cost, go back environmental protection and economy, also for the similar of other parts plus
Work provides a new processing selection.
Detailed description of the invention
Fig. 1 is seal groove schematic diagram rough turn in the present invention.
Fig. 2 is in Fig. 1 I enlarged drawing.
Fig. 3 is the seal groove schematic diagram of smart car in the present invention.
Fig. 4 is in Fig. 3 II enlarged drawing.
It is as shown in the figure: 1, seal groove.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, but the embodiment should not manage
Solution is limitation of the present invention.
The present invention is as shown in Figures 1 to 4:
A kind of method of highly-efficient processing carburizing and quenching steel part seal groove is specific to walk by taking certain power steering stgear rack piston as an example
It is rapid as follows:
(1) illustrated in rough turn seal groove 1(Fig. 1 and Fig. 2 it is rough turn after the groove width of seal groove, groove depth, slot bottom fillet, slot side extremely
The distance of end face and concentricity to benchmark): the machining allowance of 0.2mm is reserved to subsequent smart car seal groove process.With work
Part both ends centre bore is driven workpiece rotation with driving lever, is done the main fortune of turning as positioning datum with two top positioning and clampings
It is dynamic.Guarantee 2 ± 0.05mm of groove width, 4.2 ± 0.05mm of slot pitch face size, 2.8 ± 0.05mm of groove depth, slot bottom after rough turn seal groove
It is not more than 0.06 mm relative to both ends location hole concentricity, to prevent heat treatment from stress concentration occur, slot bottom leaves fillet.
Using cutting speed 165m/min, feed speed 16.5mm/min, back engagement of the cutting edge 2mm.
(2) carburizing and quenching processing is carried out to workpiece: effective carburizing and quenching 1.3~1.7mm of layer depth, surface hardness HRC58
~63, centre hardness is HRC30~45.
(3) size that should reach after smart car seal groove requirement is illustrated in smart car seal groove 1(Fig. 3 and Fig. 4): with workpiece two
Centre bore is held to drive workpiece rotation to carry out turning with driving lever with two top positioning and clampings as positioning datum.Smart car seal groove
After guarantee groove width, 4 ± 0.03mm of slot pitch face size, 3 ± 0.025mm of groove depth, slot bottom is fixed relative to both ends
Position hole concentricity is not more than 0.05 mm, groove top chamfering, slot bottom rounded corner.Using cutting speed 90m/min, feed speed 9mm/
Min, back engagement of the cutting edge 0.2mm.
Slightly, when smart car seal groove 1, because material hardness is stablized in process, different cut is respectively adopted in two procedures
Dosage is cut to guarantee cutter life and part processing quality.
According to test result, smart car seal groove process selects the CBN cutter that SUMITOMO CHEMICAL material model is BN250 can be very well
Ground is suitable for the processing for the seal groove that hardness is the range of HRC58~63.
Do not elaborate place in this specification, is technology well known in the art.
By the description of above-mentioned processing method, it should be understood by those skilled in the art that, the present invention is not limited to
Above-mentioned specific embodiment is all fallen within using the improvement of techniques well known and substitution of the invention on the basis of the present invention
Protection scope should be limited by each claim.
Claims (3)
1. a kind of method of highly-efficient processing carburizing and quenching steel part seal groove, which is characterized in that specific step is as follows:
(1) before part heat treatment, first rough turn seal groove out reserves machining allowance, and machining allowance is less than the part technical requirements
Carburizing and quenching layer depth；
(2) the rough turn part for having seal groove is subjected to carburizing and quenching, forms carburizing and quenching layer in piece surface, carburizing is quenched
The hardness of fire bed is between HRC58~63, and centre hardness is in HRC 30~45；
(3) select the cutter smart car seal groove of energy turning carburizing and quenching layer to the final size reached in the part technical requirements.
2. a kind of method of highly-efficient processing carburizing and quenching steel part seal groove according to claim 1, it is characterised in that: described
Cutter uses the CBN cutter material of SUMITOMO CHEMICAL model BN250.
3. a kind of method of highly-efficient processing carburizing and quenching steel part seal groove according to claim 1, it is characterised in that: with certain
For power steering stgear rack piston, the specific steps are as follows:
(1) machining allowance of 0.2mm rough turn seal groove: is reserved to subsequent smart car seal groove process；With workpiece both ends centre bore
Workpiece rotation is driven with driving lever, is done the main motion of turning with two top positioning and clampings as positioning datum；Rough turn seal groove
Guarantee that 2 ± 0.05mm of groove width, 4.2 ± 0.05mm of slot pitch face size, 2.8 ± 0.05mm of groove depth, slot bottom are fixed relative to both ends afterwards
Position hole concentricity is not more than 0.06 mm, and to prevent heat treatment from stress concentration occur, slot bottom leaves fillet；Using cutting speed
165m/min, feed speed 16.5mm/min, back engagement of the cutting edge 2mm；
(2) carry out carburizing and quenching processing to workpiece: effective carburizing and quenching 1.3~1.7mm of layer depth, surface hardness are HRC58~63,
Centre hardness is HRC30~45；
(3) it smart car seal groove: using workpiece both ends centre bore as positioning datum, with two top positioning and clampings, is driven with driving lever
Workpiece rotation carries out turning；Guarantee groove width after smart car seal groove, 4 ± 0.03mm of slot pitch face size, groove depth 3
± 0.025mm, slot bottom are not more than 0.05 mm, groove top chamfering, slot bottom rounded corner relative to both ends location hole concentricity；Using cutting
Cut speed 90m/min, feed speed 9mm/min, back engagement of the cutting edge 0.2mm；
Wherein: when thick, smart car seals, different cutting datas has been respectively adopted in two procedures, and rough turn cutter material uses hard
Alloy, and smart car carburizing and quenching steel seal groove process selects the CBN cutter material of SUMITOMO CHEMICAL model BN250 after being heat-treated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811525048.9A CN109454409A (en) | 2018-12-13 | 2018-12-13 | A kind of method of highly-efficient processing carburizing and quenching steel part seal groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811525048.9A CN109454409A (en) | 2018-12-13 | 2018-12-13 | A kind of method of highly-efficient processing carburizing and quenching steel part seal groove |
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| Publication Number | Publication Date |
|---|---|
| CN109454409A true CN109454409A (en) | 2019-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811525048.9A Pending CN109454409A (en) | 2018-12-13 | 2018-12-13 | A kind of method of highly-efficient processing carburizing and quenching steel part seal groove |
Country Status (1)
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| CN (1) | CN109454409A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112008340A (en) * | 2020-08-25 | 2020-12-01 | 湖北中油科昊机械制造有限公司 | Method and device for processing valve seat |
| CN115283945A (en) * | 2022-07-19 | 2022-11-04 | 陕西法士特齿轮有限责任公司 | High-hardness synchronizer riveting locking pin and machining method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1846910A (en) * | 2005-04-13 | 2006-10-18 | 万向钱潮股份有限公司 | Grinding-replacing turning device and technological process for machining shaft sleeve with clasp slot |
| EP2006413A1 (en) * | 2007-06-01 | 2008-12-24 | Sandvik Intellectual Property AB | Coated cemented carbide for die and mould applications |
| CN103273277A (en) * | 2013-06-14 | 2013-09-04 | 沈阳飞机工业（集团）有限公司 | Method for machining regulating ring part |
| CN103341743A (en) * | 2013-07-08 | 2013-10-09 | 河北华北柴油机有限责任公司 | Anti-cracking machining method of small axial surface carburizing and hardening stepped shaft with end face provided with groove |
| CN103878544A (en) * | 2014-02-28 | 2014-06-25 | 济南中森机械制造有限公司 | High-precision spindle machining process |
-
2018
- 2018-12-13 CN CN201811525048.9A patent/CN109454409A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1846910A (en) * | 2005-04-13 | 2006-10-18 | 万向钱潮股份有限公司 | Grinding-replacing turning device and technological process for machining shaft sleeve with clasp slot |
| EP2006413A1 (en) * | 2007-06-01 | 2008-12-24 | Sandvik Intellectual Property AB | Coated cemented carbide for die and mould applications |
| CN103273277A (en) * | 2013-06-14 | 2013-09-04 | 沈阳飞机工业（集团）有限公司 | Method for machining regulating ring part |
| CN103341743A (en) * | 2013-07-08 | 2013-10-09 | 河北华北柴油机有限责任公司 | Anti-cracking machining method of small axial surface carburizing and hardening stepped shaft with end face provided with groove |
| CN103878544A (en) * | 2014-02-28 | 2014-06-25 | 济南中森机械制造有限公司 | High-precision spindle machining process |
Non-Patent Citations (1)
| Title |
|---|
| 傅玉灿: "《难加工材料高效加工技术》", 31 March 2016, 西北工业大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112008340A (en) * | 2020-08-25 | 2020-12-01 | 湖北中油科昊机械制造有限公司 | Method and device for processing valve seat |
| CN115283945A (en) * | 2022-07-19 | 2022-11-04 | 陕西法士特齿轮有限责任公司 | High-hardness synchronizer riveting locking pin and machining method thereof |
| CN115283945B (en) * | 2022-07-19 | 2024-04-09 | 陕西法士特齿轮有限责任公司 | High-hardness synchronizer riveting locking pin and processing method thereof |
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Application publication date: 20190312 |