CN107586925A - A kind of induction coil for eliminating engine valve residual stress, device and method - Google Patents
A kind of induction coil for eliminating engine valve residual stress, device and method Download PDFInfo
- Publication number
- CN107586925A CN107586925A CN201711067996.8A CN201711067996A CN107586925A CN 107586925 A CN107586925 A CN 107586925A CN 201711067996 A CN201711067996 A CN 201711067996A CN 107586925 A CN107586925 A CN 107586925A
- Authority
- CN
- China
- Prior art keywords
- engine valve
- induction coil
- residual stress
- temperature
- induction
- 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.)
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Classifications
-
- 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
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- 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
-
- 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
- Y02P10/20—Recycling
-
- 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
Abstract
The invention discloses a kind of induction coil for being used to eliminate engine valve residual stress, the induction coil is in V-shape, U-shaped or undaform.Also disclose a kind of equipment for eliminating engine valve residual stress, including frame, workbench, heater and fixture, the workbench includes stationary work-table and movable table, the stationary work-table is fixedly installed in frame, the movable table is installed in frame by apparatus for feeding, it is characterized in that, the heater is installed on the stationary work-table, including induction heating power and above-mentioned induction coil, the induction coil is installed on the output end of the induction heating power and positioned at the front of the fixture setting tool；The fixture is used to clamp engine valve, and close to the position of induction coil on movable table.Homogeneous heating of the present invention, destressing temperature is low, the highly stable residual stress for eliminating valve heap postwelding of energy, and product qualification rate is high.
Description
Technical field
The present invention relates to valve manufacture field, and in particular to a kind of induction coil for eliminating engine valve residual stress,
Device and method.
Background technology
Technique for overlaying is a kind of maintenance technique for using welding method strengthen machinery part surface, utilizes this technology
The chemical composition and institutional framework of piece surface can be changed, improve its performance, extend the service life of part, had important
Economic value.In order to improve the life-span of engine valve sealing surface (i.e. the conical surface or discone antenna surface), then need in engine valve
Disk end pile-up welding hard alloy, but technique for overlaying can inevitably bring built-up welding residual stress, built-up welding residual stress and external applied load
Caused Stress superposition easily causes regional area stress excessive, so that structural-load-carrying capacity declines.Regional area stress
Cross conference and cause crackle and deformation, structural failure can be then caused when deformation is excessive.
Method on eliminating built-up welding residual stress is a lot, and electromagnetic induction tempering is exactly the method for eliminating built-up welding residual stress
One of.The ring plain coil of similar mosquito-repellent incense shape is often used to heat valve bottom surface as induction coil to disappear in the prior art
Except the built-up welding residual stress of valve, induction coil is located on same center line with engine valve, but can according to Lenz's law
Know, the line of magnetic induction of ring plain coil is annularly distributed, and the direction with the rotation of engine valve bottom surface is overlapping, so meeting
Cause, to head portion that bottom surface non-uniform temperature, so as to easily cause the phenomenon of hot-spot, and then to cause valve bottom surface to occur
Burning region, reduce the qualification rate of product.In addition, during using ring plain coil, ring plain coil hides during due to work
The bottom surface of valve has been kept off, therefore the thermometric to valve bottom surface can not be realized during infrared measurement of temperature, and valve bottom surface is temperature when heating
Highest position, thus easily result in infrared measurement of temperature inaccuracy, it is difficult to the accurate grasp to temperature is realized, is easily caused
Valve bottom surface metallographic is unqualified, causes product qualification rate low.
The content of the invention
To overcome existing technological deficiency, it is used to eliminate engine valve residual stress and electromagnetism the invention provides one kind
The induction coil that sensing heating is more uniformly distributed.
Present invention also offers the device and method of the elimination engine valve residual stress using above-mentioned induction coil.
To realize the purpose of the present invention, it is achieved using following technical scheme：
It is a kind of to be used to eliminating the induction coil of engine valve residual stress, the induction coil in V-shape, U-shaped or
Undaform.
Use the ring plain coils of similar mosquito-repellent incense shape to be used as induction coil heated engine valve in the prior art more
When bottom surface is tempered, easily cause engine valve hot-spot, and then cause valve bottom surface burning, product qualification rate occur
It is low；And the line of magnetic induction of induction coil provided by the present invention is almost the motion of valve bottom surface during valve rotation in line row's shape
The continuous line of cut row's shape line of magnetic induction distributed area in direction, so that valve bottom surface is uniformly heated, largely avoided gas
There is hot-spot phenomenon in door.In addition, relative to the ring plain coil of existing used similar mosquito-repellent incense shape, the present invention saves
Coil manufacture material, reduce cost.
Preferably, above-mentioned induction coil is in W fonts.Relative to V-shape and U-shaped induction coil, the induction coil of W fonts
The efficiency of heating surface it is higher；And, control often higher relative to the wavy induction coil more than a W font, its efficiency of heating surface
Difficulty is relatively large.
A kind of equipment for eliminating engine valve residual stress, including frame, workbench, heater and fixture, it is described
Workbench includes stationary work-table and movable table, and the stationary work-table is fixedly installed in frame, the active operation
Platform is installed in frame by apparatus for feeding, and the heater is installed on the stationary work-table, including sensing heating electricity
Source and above-mentioned induction coil, the induction coil are installed on the output end of the induction heating power and consolidated positioned at the fixture
Determine the front of instrument；The fixture is used to clamp engine valve, and close to the position of induction coil on movable table.
Further, during heating, the sunk part (i.e. pit) of the induction coil face engine valve bottom surface.Heating
When, coil answers the pit of face engine valve, can so make the heating to valve bottom surface pit more efficient, avoid because of pit
Underheat and cause non-uniform temperature and then cause to be tempered ineffective situation.
Further, the said equipment also includes the temperature measuring equipment on stationary work-table, and temperature measuring equipment is close to engine
The bottom surface of valve and the conical surface, for measuring the bottom surface of engine valve and the temperature of the conical surface.
Relative to ring plain coil, masked area of the induction coil of the present invention to engine valve bottom surface
Small, measuring valve bottom surface temperature for temperature measuring equipment does not influence, and therefore, the present invention measures temperature simultaneously in the conical surface of valve and bottom surface
Degree, the maximum temperature of valve tempering so can be preferably monitored, in order to adjust heating parameters, effectively eliminating valve remnants should
Power, and valve bottom surface metallographic will not be caused unqualified, the control difficulty of tempering is reduced, improves product qualification rate.
A kind of method that engine valve residual stress is eliminated using above-mentioned induction coil, is comprised the following steps：
S1：After induction heating power steady operation, with induction coil heated engine valve, quickly heat up to valve
Stress temperature；
S2：When engine valve is heated to destressing temperature, induction coil is stopped immediately；
S3：Allow engine valve natural cooling.
Further, during heating induction coil 10~100KHz of frequency range, power bracket is 5~20KW.
Further, the scope of the destressing temperature is 900~1000 DEG C.(use ring-shaped flat upper thread in the prior art
Circle is used as induction coil), when destressing temperature is less than 1020 DEG C, stress elimination is unstable.But when destressing temperature is
It is uneven due to heating although residual tension can be eliminated at 1020 DEG C, cause valve bottom surface " thumbnail " shape occur
The high-temperature area of shape, causes product quality problems occur.The present invention significantly reduces destressing temperature, and residual stress eliminates
It is stable.Preferably, the scope of the destressing temperature is 920~980 DEG C.Be not in " thumb due to bottom surface homogeneous heating
Abnormal Precipitation be present in first " burning region and valve R positions surface.
Further, the distance between thermoinduction coil and engine valve bottom surface are 1~5mm.
Compared with the prior art, the invention has the advantages that：
(1) present invention devises a kind of for eliminating engine valve residual stress according to valve characteristics and Lenz's law
Induction coil, loop construction is simple, homogeneous heating, and the manufacture craft of coil is simple, saves substantial amounts of manufacture material, reduces
Manufacturing cost.
(2) present invention also offers it is a kind of using above-mentioned induction coil elimination engine valve residual stress device and
Method, the residual stress for eliminating valve heap postwelding can be stablized, realize the optimization to metallographic structure；The present invention adds to valve bottom
Heat is more uniformly distributed, and is not in burn-off phenomenon, while reduces destressing temperature, and R positions surface does not have Precipitation.
Brief description of the drawings
Fig. 1 is the schematic diagram of W font coils；
Fig. 2 is the structural representation for the equipment for eliminating engine valve residual stress.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawings to embodiment of the present invention
It is described in more detail.
Embodiment
A kind of induction coil for being used to eliminate engine valve residual stress is present embodiments provided, induction coil is in V words
Type, U-shaped or undaform.Preferably W fonts, as shown in Figure 1.
As shown in Fig. 2 the present embodiment additionally provides a kind of device using above-mentioned induction coil, including frame, workbench,
Heater, fixture and control device, the workbench include stationary work-table 1 and movable table 2, and stationary work-table 1 is solid
Dingan County is loaded in frame, and movable table 2 is installed in frame by apparatus for feeding, and the heater is installed on the fixation
On workbench 1, including induction heating power 4 and induction coil 6, the induction coil 6 are installed on the induction heating power 4
Output end and the front for being located at the fixture setting tool；The fixture is used to clamp engine valve, and is located at active operation
Close to the position of induction coil on platform 2.Control device is control cabinet 17.
Wherein, induction coil is in V-shape, U-shaped or undaform.Preferably W fonts.
Static workbench l is provided with water-cooling circulating system 3 and infrared thermometry device 7, and water-cooling circulating system 3 passes through circulation
Water pipe 15, which is stretched into inside induction heating power 4, to carry out water cooling to induction heating power 4；Infrared thermometry device 7 is fixedly mounted
It is connected in static workbench 1 and with control cabinet 17, thermal sensor is at coil 6, for measuring engine valve bottom surface and cone
The temperature in face.
Movable table 2 with static workbench 1 positioned at being arranged side by side, below provided with cooperating therewith and have dovetail groove
Guide rail 22.Movable table 2 is connected with apparatus for feeding, and the apparatus for feeding with movable table 2 including being connected to inlet casing
21 and be connected with to inlet casing 21 and for control to inlet casing feed and retreat electric control reversing valve 20, control cabinet 17 with electricity
Reversal valve 20 is controlled to be connected.
Clamping the fixture on engine air doorway includes bearing fixture 12, contact roller 8, bow 18, pneumatic linear actuator 9, transmission
Mechanism and power source.Wherein, bearing fixture 12 is arranged at the proximity induction coil 6 of movable table 2 and face induction coil 6,
To place the gap slot of valve axis, lower end is mounting seat for its upper end；Pass through a central shaft between " prong " of bow 18
It is connected with contact roller 8, " fork handle " of bow 18 is connected with cylinder 9；The breach of gap slot is relative with contact roller 8, contact roller 8
Axis and the axis parallel of valve that is placed in gap slot.Transmission mechanism is by 14 groups of Hooks coupling universal coupling 13 and reduction box
Into, its power source is motor 10, and motor 10 is connected with the input of reduction box 14, the output end of reduction box 14 with it is universal
One end of axle device 13 is connected, the other end and center axis connection.
A kind of method that engine valve residual stress is eliminated using above-mentioned induction coil, is comprised the following steps：
S1：After induction heating power steady operation, with induction coil heated engine valve, quickly heat up to valve
Stress temperature；
S2：When engine valve is heated to destressing temperature, induction coil is stopped immediately；
S3：Allow engine valve natural cooling.
Wherein, during heating induction coil 10~100KHz of frequency range, power bracket is 5~20KW.Destressing temperature
Scope be 900~1000 DEG C.Preferably, the scope of the destressing temperature is 920~980 DEG C.
Specifically, during work, machine control reversal valve 19 controls cylinder 9 to be fed, and is compressed when controlling cylinder 9 and contact roller 8 to promote
Engine valve 11, engine valve 11 is unclamped when withdrawing：Electric control reversing valve 20 is controlled to inlet casing 21, i.e., according to control cabinet 17
The signal sent promotes or withdraws movable table 2, even if movable table 2 moves along guide rail 16；Specific work process is as follows：
(1) start water-cooling circulating system 3, cold water is transported in induction heating power 4；
(2) start feeling should make induction coil 6 produce magnetic induction such as thermoelectric generator 4 by power output device 5；Cold water passes through
Sensing heat as caused by when the pipeline inside thermoelectric generator 4 takes away power module and induction coil 6 works；
(3) motor 10 is started by control cabinet 17, motor 10 drives Hooks coupling universal coupling 13 by reduction box 14, by ten thousand
Contact roller 8 is driven to rotate to shaft coupling 13：Engine valve 11 is put on bearing fixture 12, starts the longitudinal jacking pressure of cylinder 9
Bearing up pulley 8, contact roller 8 is compressed the bar portion of engine valve 11 with bearing fixture 12 and drive engine valve 11 to rotate；
(4) after the completion of above step, the laterally feed of 17 automatic control activity workbench of control cabinet 2, the engine of rotation
Valve 11 promotes to induction coil 6, and face carries out sensing heating close to induction coil 6, and engine valve retainer part starts heating and become
Red, rotation is to ensure such as the uniformity of heat：When engine valve 11 is heated to defined temperature, infrared thermometry dress
7 are put when detecting set temperature and issues instructions to control cabinet 17, control cabinet 17 sends active operation after receiving signal
The instruction that platform 2 is stepped back, then movable table 2 exit, cylinder 9 retract drive contact roller 8 unclamp；Engine valve 11 is put into
Natural cooling in basket is cooled down, a working cycles are completed.
Wherein, in step (4), during sensing heating, the distance between thermoinduction coil and engine valve bottom surface are preferably 1
~5mm.
Preferably, it is guarantee homogeneous heating degree, the pit of the copper pipe face valve bottom surface of induction coil 6.
Above-described embodiment is only intended to clearly illustrate example of the present invention, and is not the embodiment party to the present invention
The restriction of formula.For those of ordinary skill in the field, other differences can also be made on the basis of the above description
The change or variation of form.There is no necessity and possibility to exhaust all the enbodiments.It is all the present invention it is spiritual and former
All any modification, equivalent and improvement made within then etc., should be included within the protection domain of the claims in the present invention.
Claims (10)
1. a kind of induction coil for being used to eliminate engine valve residual stress, it is characterised in that the induction coil is in V words
Type, U-shaped or undaform.
2. the induction coil according to claim 1 for being used to eliminate engine valve residual stress, it is characterised in that described
Induction coil is in W fonts.
3. a kind of equipment for eliminating engine valve residual stress, including frame, workbench, heater and fixture, the work
Making platform includes stationary work-table and movable table, and the stationary work-table is fixedly installed in frame, the movable table
It is installed on by apparatus for feeding in frame, it is characterised in that the heater is installed on the stationary work-table, including sense
Heating power supply and the induction coil according to any one of claim 1~2 are answered, the induction coil is installed on the sensing and added
The output end of thermoelectric generator and the front for being located at the fixture setting tool；The fixture is used to clamp engine valve, and is located at
Close to the position of induction coil on movable table.
4. the equipment according to claim 3 for eliminating engine valve residual stress, it is characterised in that described during heating
The sunk part of induction coil face engine valve bottom surface.
5. the equipment of the elimination engine valve residual stress according to claim 3 or 4, it is characterised in that also include setting
In the temperature measuring equipment on stationary work-table, temperature measuring equipment is close to the bottom surface of engine valve and the conical surface, for measuring engine air
The bottom surface of door and the temperature of the conical surface.
6. a kind of induction coil using described in any one of claim 1~2 eliminates the method for engine valve residual stress,
It is characterised in that it includes following steps：
S1：After induction heating power steady operation, with induction coil heated engine valve, being heated to engine valve should
Power temperature；
S2：When engine valve is heated to destressing temperature, induction coil is stopped immediately；
S3：Allow engine valve natural cooling.
7. the method according to claim 6 for eliminating engine valve residual stress, it is characterised in that line of induction during heating
10~100KHz of frequency range of circle, power bracket are 5~20KW.
8. the method for the elimination engine valve residual stress according to claim 6 or 7, it is characterised in that described to go to answer
The scope of power temperature is 900~1000 DEG C.
9. the method according to claim 8 for eliminating engine valve residual stress, it is characterised in that the destressing temperature
The scope of degree is 920~980 DEG C.
10. the method for the elimination engine valve residual stress according to claim 6 or 7 or 9, it is characterised in that thermal sensation
It is 1~5mm to answer the distance between coil and engine valve bottom surface.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711067996.8A CN107586925A (en) | 2017-11-03 | 2017-11-03 | A kind of induction coil for eliminating engine valve residual stress, device and method |
| PCT/CN2017/109474 WO2019084941A1 (en) | 2017-11-03 | 2017-11-06 | Induction coil, apparatus and method for eliminating engine valve residual stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711067996.8A CN107586925A (en) | 2017-11-03 | 2017-11-03 | A kind of induction coil for eliminating engine valve residual stress, device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107586925A true CN107586925A (en) | 2018-01-16 |
Family
ID=61044024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711067996.8A Pending CN107586925A (en) | 2017-11-03 | 2017-11-03 | A kind of induction coil for eliminating engine valve residual stress, device and method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107586925A (en) |
| WO (1) | WO2019084941A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108707860A (en) * | 2018-07-24 | 2018-10-26 | 西安建筑科技大学 | A kind of roll surface cyclic hardening prosthetic device and restorative procedure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112795858B (en) * | 2020-12-28 | 2022-04-15 | 内蒙古千山重工有限公司 | Device for treating stress of automobile aluminum alloy hub by adopting electromagnetic energy aging method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1718772A (en) * | 2005-08-02 | 2006-01-11 | 怀集县汽车配件制造有限责任公司 | Technological method for eliminating engine valve disk terminal conical face fensile stress and its equipment |
| US20100319642A1 (en) * | 2008-02-19 | 2010-12-23 | Ntn Corporation | Roller follower, valve train, induction hardening apparatus, method of heat treatment of shaft member, method of manufacturing shaft, and shaft |
| CN102735561A (en) * | 2012-06-19 | 2012-10-17 | 浙江大学 | Cylinder head thermal shock test bench based on pre-tightening force, and method thereof |
| CN104195306A (en) * | 2014-07-29 | 2014-12-10 | 中国重汽集团济南动力有限公司 | Thermal treatment intensifying equipment for brake disc of disc brake of heavy truck |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2811314Y (en) * | 2005-08-02 | 2006-08-30 | 怀集县汽车配件制造有限责任公司 | Device for relieving tensile stress of valve retainer end tapered surface of engine |
| CN102517502B (en) * | 2012-01-16 | 2014-01-15 | 株洲钻石钻掘工具有限公司 | Disk-shaped roller cutter ring and manufacture method thereof |
| CN202755028U (en) * | 2012-08-09 | 2013-02-27 | 刘剑 | Novel valve cap shape quenching sensor |
-
2017
- 2017-11-03 CN CN201711067996.8A patent/CN107586925A/en active Pending
- 2017-11-06 WO PCT/CN2017/109474 patent/WO2019084941A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1718772A (en) * | 2005-08-02 | 2006-01-11 | 怀集县汽车配件制造有限责任公司 | Technological method for eliminating engine valve disk terminal conical face fensile stress and its equipment |
| US20100319642A1 (en) * | 2008-02-19 | 2010-12-23 | Ntn Corporation | Roller follower, valve train, induction hardening apparatus, method of heat treatment of shaft member, method of manufacturing shaft, and shaft |
| CN102735561A (en) * | 2012-06-19 | 2012-10-17 | 浙江大学 | Cylinder head thermal shock test bench based on pre-tightening force, and method thereof |
| CN104195306A (en) * | 2014-07-29 | 2014-12-10 | 中国重汽集团济南动力有限公司 | Thermal treatment intensifying equipment for brake disc of disc brake of heavy truck |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108707860A (en) * | 2018-07-24 | 2018-10-26 | 西安建筑科技大学 | A kind of roll surface cyclic hardening prosthetic device and restorative procedure |
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| Publication number | Publication date |
|---|---|
| WO2019084941A1 (en) | 2019-05-09 |
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Application publication date: 20180116 |
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