CN104128760A - Machining technology of GCr15 ring gauges convenient to use - Google Patents
Machining technology of GCr15 ring gauges convenient to use Download PDFInfo
- Publication number
- CN104128760A CN104128760A CN201410355062.4A CN201410355062A CN104128760A CN 104128760 A CN104128760 A CN 104128760A CN 201410355062 A CN201410355062 A CN 201410355062A CN 104128760 A CN104128760 A CN 104128760A
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- China
- Prior art keywords
- machining
- blank
- gcr15
- ring gauge
- phosphating
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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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses a machining technology of GCr15 ring gauges convenient to use. The machining technology of the GCr15 ring gauges convenient to use comprises the steps of blank blanking, machining, heat treatment, end face machining and inner circle and outer circle precision grinding in sequence. Blanks are made of GCr15. The machining step comprises the processes of conducting turning of ring-shaped grooves of the side faces of the blanks, brass filling of the annular grooves, brass steel letter punching, and inner circle and outer circle machining of the blanks in sequence. The heat treatment step involves high-temperature quenching and low-temperature tempering which are conducted in sequence, the temperature of low-temperature tempering is any value in the range from 155 DEG C to 175 DEG C, the time for low-temperature tempering is not shorter than 3h, and a forging step is further executed between the blank blanking step and the machining step. By means of the technology, the ring gauges longer in service life, better in quality and more convenient to use can be obtained conveniently, and the technology is beneficial to the detection cost of piston rings and is further beneficial to the detection precision and reliability of the piston rings.
Description
Technical field
The present invention relates to the manufacturing process for the measurer of size detection, particularly relate to a kind of GCr15 ring gauge processing technology easy to use.
Background technology
Piston ring is as one of vital part in engine, and the quality of performance and quality directly affects the every technical-economic index of engine, and wherein the end-gaps of piston ring is one of important technological parameters affecting engine sealing property.Because dissimilar and engine structure are about 0.3% to 1.8% of air inflow by the air leakage of piston ring end gap clearance, in order to reduce air leakage, just must reduce the end-gaps of piston ring, in existing standard, general provision end-gaps greatest limit tolerance is 0.3mm as far as possible.Along with improving constantly of engine performance, as at constantly ripe supercharger h type engine h of technology in recent years, requirement to piston ring is more and more higher, if the end-gaps tolerance of some high-power Piston Ring for Auto Diesel Engine is only 0.1mm, this just makes piston ring in production and use procedure, and it is particularly important that the quality to piston ring and size Control seem.In prior art, be ring gauge for the critical piece of piston ring size detection, start to the whole process of product inspection from piston ring copying, the kind of the operation that ring gauge uses and the specification of required ring gauge, do not have his measurer can be by comparison, good ring gauge quality be the solid foundation that piston ring end gap clearance deviation ensures.
Summary of the invention
For above-mentioned, for ensureing piston ring end gap clearance deviation, the problem that good ring gauge quality is its solid foundation, the invention provides a kind of GCr15 ring gauge processing technology easy to use.
For the problems referred to above, a kind of GCr15 ring gauge processing technology easy to use provided by the invention reaches goal of the invention by following technical essential: a kind of GCr15 ring gauge processing technology easy to use, comprise blank blanking in sequence, machining, heat treatment, end face processing and inside and outside circle fine grinding, the material of described blank is GCr15, described machining comprises blank side annular groove turning in sequence, annular groove brass is filled, brass steel letters are developed and printed, blank inner circle and Excircle machining, described heat treatment comprises quench hot and lonneal in sequence, the temperature of described quench hot is any number in 845 DEG C to 865 DEG C, the cooling procedure of quench hot comprises quenching and two processes of Slow cooling, described quench step is to adopt saline solution that blank is cooled to any number in 190 DEG C to 400 DEG C, described Slow cooling is that the blank that quenching is obtained adopts air cooling or oil cooling, the temperature of described lonneal is any number in 155 DEG C to 175 DEG C, the lonneal time is not less than 3h, between described blank blanking and machining operation, also comprise and forge step.
Further technical scheme is:
Described inside and outside circle fine grinding step subsequent also comprises phosphatization treatment step.
Described phosphatization treatment step is to be 1:(9-10 by the inside and outside circle ratio that the product that obtains in step is placed in solution free acidity and total acidity of polishing) Phosphating Solution, the temperature of described Phosphating Solution is at 60 DEG C within the scope of 70 DEG C, phosphating time is 13 to 20min.
Described phosphatization treatment step is to be 1:(10-12 by the inside and outside circle ratio that the product that obtains in step is placed in solution free acidity and total acidity of polishing) Phosphating Solution, the temperature of described Phosphating Solution is at 50 DEG C within the scope of 60 DEG C, phosphating time is 8 to 15min.
In described Phosphating Solution, go back Phosphating Accelerant.
Described Phosphating Accelerant is azanol.
The present invention has following beneficial effect:
1, ring gauge manufacturing approach craft provided by the invention is simple, by choosing specific quench hot, low tempering temperatures and time, and arranged and forge step before heat treatment, first loosen by the as cast condition forging in step elimination blank, even slag inclusion, the defects such as pore, be convenient to make form in blank complete metal streamline simultaneously, by follow-up heat treatment, can make the case hardness of product higher than 65HRC, be at least 4 times of ring gauge life-span that existing employing 45# steel or 40Gr obtain as base material the service life that makes to manufacture by GCr15 the ring gauge forming, and material and manufacturing cost are only 2.5 times of prior art, more than be arranged so that the present invention is not only beneficial to the testing cost of piston ring, also help accuracy of detection and the reliability of piston ring.
2, quenching and two processes of Slow cooling that the quench hot arranging adopts, quenching is conducive to the quenching degree of high temperature blank, when Slow cooling is conducive to prevent the metallographic of blank to be transformed to martensite by austenite, larger structural stress causes in blank and forms crackle, is conducive to the product quality of ring gauge.
3, during the annular groove turning of blank side, the filling of annular groove brass, the brass steel letters that mechanical processing steps comprises are developed and printed, the annular groove turning of blank side is intended to obtain annular groove in ring gauge side, reach the object that alleviates ring gauge weight, be convenient to ring gauge in use operating personnel be easier to promptly, be conducive to the use of ring gauge; The brass steel letters that arrange are developed and printed for mark ring gauge size on ring gauge, the outside diameter that is set to brass in actual production is less than ring gauge diameter, ring gauge is after long-time use like this, the impact of developing and printing font and be subject to corrosion on brass be can avoid, the service life of ring gauge and the convenience of use are conducive to.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but structure of the present invention is not limited only to following examples.
Embodiment 1:
A kind of GCr15 ring gauge processing technology easy to use, comprise blank blanking in sequence, machining, heat treatment, end face processing and inside and outside circle fine grinding, the material of described blank is GCr15, described machining comprises blank side annular groove turning in sequence, annular groove brass is filled, brass steel letters are developed and printed, blank inner circle and Excircle machining, described heat treatment comprises quench hot and lonneal in sequence, the temperature of described quench hot is any number in 845 DEG C to 865 DEG C, the cooling procedure of quench hot comprises quenching and two processes of Slow cooling, described quench step is to adopt saline solution that blank is cooled to any number in 190 DEG C to 400 DEG C, described Slow cooling is that the blank that quenching is obtained adopts air cooling or oil cooling, the temperature of described lonneal is any number in 155 DEG C to 175 DEG C, the lonneal time is not less than 3h, between described blank blanking and machining operation, also comprise and forge step.
Ring gauge manufacturing approach craft provided by the invention is simple, by choosing specific quench hot, low tempering temperatures and time, and arranged and forge step before heat treatment, first loosen by the as cast condition forging in step elimination blank, even slag inclusion, the defects such as pore, be convenient to make form in blank complete metal streamline simultaneously, by follow-up heat treatment, be at least 4 times of ring gauge life-span that existing employing 45# steel or 40Gr obtain as base material the service life that makes to manufacture by GCr15 the ring gauge forming, and material and manufacturing cost are only 2.5 times of prior art, more than be arranged so that the present invention is not only beneficial to the testing cost of piston ring, also help accuracy of detection and the reliability of piston ring.
Quenching and two processes of Slow cooling that the quench hot arranging adopts, quenching is conducive to the quenching degree of high temperature blank, when Slow cooling is conducive to prevent the metallographic of blank to be transformed to martensite by austenite, larger structural stress causes and in blank, forms crackle, be conducive to the product quality of ring gauge, in the present embodiment, saline solution adopts 10% saline solution.
During the annular groove turning of blank side, the filling of annular groove brass, the brass steel letters that mechanical processing steps comprises are developed and printed, the annular groove turning of blank side is intended to obtain annular groove in ring gauge side, reach the object that alleviates ring gauge weight, be convenient to ring gauge in use operating personnel be easier to promptly, be conducive to the use of ring gauge; The brass steel letters that arrange are developed and printed for mark ring gauge size on ring gauge, the outside diameter that is set to brass in actual production is less than ring gauge diameter, ring gauge is after long-time use like this, the impact of developing and printing font and be subject to corrosion on brass be can avoid, the service life of ring gauge and the convenience of use are conducive to.
Embodiment 2:
The present embodiment is further qualified on the basis of embodiment 1, for making to form anti-attrition layer and the anticorrosive coat with self-lubricating property in the outside of ring gauge, further to ensure the service life of the ring gauge that the present invention obtains, described inside and outside circle fine grinding step subsequent also comprises phosphatization treatment step.
Described phosphatization treatment step is to be 1:(9-10 by the inside and outside circle ratio that the product that obtains in step is placed in solution free acidity and total acidity of polishing) Phosphating Solution, the temperature of described Phosphating Solution is at 60 DEG C within the scope of 70 DEG C, phosphating time is 13 to 20min.
Described phosphatization treatment step is to be 1:(10-12 by the inside and outside circle ratio that the product that obtains in step is placed in solution free acidity and total acidity of polishing) Phosphating Solution, the temperature of described Phosphating Solution is at 50 DEG C within the scope of 60 DEG C, phosphating time is 8 to 15min.
For strengthening the effect of phosphatization step, be convenient to obtain darker phosphate coating, in described Phosphating Solution, go back Phosphating Accelerant.
For simplifying the technology controlling and process of phosphatization step and avoiding promoter to environment, described Phosphating Accelerant is azanol.
Above content is the further description of the present invention being done in conjunction with concrete preferred embodiment, can not assert that the specific embodiment of the present invention is confined to these explanations.For general technical staff of the technical field of the invention, not departing from other embodiments that draw under technical scheme of the present invention, all should be included in protection scope of the present invention.
Claims (6)
1. a GCr15 ring gauge processing technology easy to use, comprise blank blanking in sequence, machining, heat treatment, end face processing and inside and outside circle fine grinding, it is characterized in that, the material of described blank is GCr15, described machining comprises blank side annular groove turning in sequence, annular groove brass is filled, brass steel letters are developed and printed, blank inner circle and Excircle machining, described heat treatment comprises quench hot and lonneal in sequence, the temperature of described quench hot is any number in 845 DEG C to 865 DEG C, the cooling procedure of quench hot comprises quenching and two processes of Slow cooling, described quench step is to adopt saline solution that blank is cooled to any number in 190 DEG C to 400 DEG C, described Slow cooling is that the blank that quenching is obtained adopts air cooling or oil cooling, the temperature of described lonneal is any number in 155 DEG C to 175 DEG C, the lonneal time is not less than 3h, between described blank blanking and machining operation, also comprise and forge step.
2. a kind of GCr15 ring gauge processing technology easy to use according to claim 1, is characterized in that, described inside and outside circle fine grinding step subsequent also comprises phosphatization treatment step.
3. a kind of GCr15 ring gauge processing technology easy to use according to claim 2, it is characterized in that, described phosphatization treatment step is to be 1:(9-10 by the inside and outside circle ratio that the product that obtains in step is placed in solution free acidity and total acidity of polishing) Phosphating Solution, the temperature of described Phosphating Solution is at 60 DEG C within the scope of 70 DEG C, and phosphating time is 13 to 20min.
4. a kind of GCr15 ring gauge processing technology easy to use according to claim 2, it is characterized in that, described phosphatization treatment step is to be 1:(10-12 by the inside and outside circle ratio that the product that obtains in step is placed in solution free acidity and total acidity of polishing) Phosphating Solution, the temperature of described Phosphating Solution is at 50 DEG C within the scope of 60 DEG C, and phosphating time is 8 to 15min.
5. according to the GCr15 ring gauge processing technology a kind of easy to use described in any one in claim 3 or 4, it is characterized in that Phosphating Accelerant also in described Phosphating Solution.
6. a kind of GCr15 ring gauge processing technology easy to use according to claim 5, is characterized in that, described Phosphating Accelerant is azanol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355062.4A CN104128760A (en) | 2014-07-24 | 2014-07-24 | Machining technology of GCr15 ring gauges convenient to use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355062.4A CN104128760A (en) | 2014-07-24 | 2014-07-24 | Machining technology of GCr15 ring gauges convenient to use |
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| CN104128760A true CN104128760A (en) | 2014-11-05 |
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| CN201410355062.4A Pending CN104128760A (en) | 2014-07-24 | 2014-07-24 | Machining technology of GCr15 ring gauges convenient to use |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4077812A (en) * | 1975-03-25 | 1978-03-07 | Ntn Toyo Bearing Co. Ltd. | Method of working steel machine parts including machining during quench cooling |
| CN101597682A (en) * | 2009-07-09 | 2009-12-09 | 贵州大学 | Process for ultrafining heat-treatment on crystal grains of axle steel |
| CN102328187A (en) * | 2011-08-31 | 2012-01-25 | 慈溪市汇丽机电有限公司 | Machining method of inner ring gauge |
| CN102443744A (en) * | 2011-12-05 | 2012-05-09 | 无锡市东方抗磨工程有限公司 | Interrupted quenching heat treatment process for high-medium carbon alloy steel |
| CN102886916A (en) * | 2012-09-17 | 2013-01-23 | 北京奥科瑞丰新能源股份有限公司 | Pressure roller for biomass briquetting machine and machining method for pressure roller |
| CN103350204A (en) * | 2013-06-07 | 2013-10-16 | 马鞍山市恒毅机械制造有限公司 | Composite centrifugal casting method of sealing ring |
-
2014
- 2014-07-24 CN CN201410355062.4A patent/CN104128760A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4077812A (en) * | 1975-03-25 | 1978-03-07 | Ntn Toyo Bearing Co. Ltd. | Method of working steel machine parts including machining during quench cooling |
| CN101597682A (en) * | 2009-07-09 | 2009-12-09 | 贵州大学 | Process for ultrafining heat-treatment on crystal grains of axle steel |
| CN102328187A (en) * | 2011-08-31 | 2012-01-25 | 慈溪市汇丽机电有限公司 | Machining method of inner ring gauge |
| CN102443744A (en) * | 2011-12-05 | 2012-05-09 | 无锡市东方抗磨工程有限公司 | Interrupted quenching heat treatment process for high-medium carbon alloy steel |
| CN102886916A (en) * | 2012-09-17 | 2013-01-23 | 北京奥科瑞丰新能源股份有限公司 | Pressure roller for biomass briquetting machine and machining method for pressure roller |
| CN103350204A (en) * | 2013-06-07 | 2013-10-16 | 马鞍山市恒毅机械制造有限公司 | Composite centrifugal casting method of sealing ring |
Non-Patent Citations (1)
| Title |
|---|
| 南晖: "特殊螺纹环规的设计与制造", 《高压电器》 * |
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Application publication date: 20141105 |
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