CN108544183A - Steel pistons preheating device and method - Google Patents
Steel pistons preheating device and method Download PDFInfo
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- CN108544183A CN108544183A CN201810508873.1A CN201810508873A CN108544183A CN 108544183 A CN108544183 A CN 108544183A CN 201810508873 A CN201810508873 A CN 201810508873A CN 108544183 A CN108544183 A CN 108544183A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 60
- 239000010959 steel Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 243
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 140
- 238000003466 welding Methods 0.000 claims abstract description 24
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 abstract description 12
- 230000007613 environmental effect Effects 0.000 abstract description 9
- 238000004134 energy conservation Methods 0.000 abstract description 8
- 238000003860 storage Methods 0.000 description 9
- 238000004590 computer program Methods 0.000 description 8
- 238000005485 electric heating Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000012774 insulation material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004153 renaturation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
Classifications
-
- 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
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention provides a kind of steel pistons preheating devices and method, device to include：Assemble preheated zone and weld preheating region；First electromagnetic induction heating coil, when piston inner ring and piston outer ring are positioned over assembly preheated zone, the first electromagnetic induction heating coil covers piston outer ring；Second electromagnetic induction heating coil, when being moved to weld preheating region after piston inner ring and the assembly of piston outer ring, the second electromagnetic induction heating coil covers piston outer ring and piston inner ring；Automatic assembling apparatus；Automatic mobile device；Controller is connected with the first electromagnetic induction heating coil, the second electromagnetic induction heating coil, automatic assembling apparatus, automatic mobile device respectively.Technical solution through the invention, heat utilization rate is high, energy conservation and environmental protection, and heating speed is fast, influence smaller to welding, realizes Automated assembly, substantially increases safety, reduces the labor intensity of staff, it accurately controls simultaneously, good process repeatability, product with stable quality.
Description
Technical field
The present invention relates to technical field of heat treatment, in particular to a kind of steel pistons preheating device and a kind of steel pistons
Pre-heating mean.
Background technology
Continuous promotion with people to environmental problem attention degree, the requirement to engine performance are also being continuously improved.
Currently, truck, engineering machinery all develop to high-power, high load capacity direction, reinforcing degree is continuously improved, common aluminum alloy
Piston cannot increasingly meet the needs of development of engine, and steel pistons are due to intensity height, high temperature resistant, good toughness, thermal conductivity
The advantages that good and fatigue resistance is good has become the important directions of piston development.Laser welding steel pistons are more closed due to its structure
Reason, in the case of onesize shape, can arrange the combustion chamber of bigger, the interior oil cooling passage of bigger, piston mass smaller can
It is the development trend of the following steel pistons to provide the power of bigger.
Due to structural factor, piston outer ring (head) and inner ring (skirt section) must be assemblied in before the weldering of laser welding steel pistons
Together, and it is heated to certain temperature.In the related technology, piston outer ring is generally put into resistance heating stove heat；When piston outer ring
After being heated to certain temperature, takes out and carry out hand assembled, become an entirety；Piston after assembly is integrally put into resistance
Heating in heating furnace, prepares welding, there are following technological deficiencies：
(1) heat utilization rate is low, and the being heated evenly property of steel pistons is poor, under the efficiency of heating surface is relatively low.
(2) the degree of automation is low, and there are some potential safety problemss.
Invention content
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, it is an object of the present invention to provide a kind of steel pistons preheating devices.
It is another object of the present invention to provide a kind of steel pistons pre-heating means.
To achieve the goals above, the technical solution of the first aspect of the present invention provides a kind of steel pistons preheating device,
Including：Preheated zone and weld preheating region are assembled, preheated zone and weld preheating region is assembled and lives for placing corresponding steel
Plunger member, steel pistons component include piston inner ring and piston outer ring；First electromagnetic induction heating coil, in piston inner ring and piston
When outer ring is positioned over assembly preheated zone, the first electromagnetic induction heating coil covers piston outer ring, and electromagnetism is carried out to piston outer ring
Heating；Second electromagnetic induction heating coil, when being moved to weld preheating region after piston inner ring and the assembly of piston outer ring, second
Electromagnetic induction heating coil covers piston outer ring and piston inner ring, carries out electromagnetic heating；Automatic assembling apparatus, with assembly preheating zone
Domain is adjacent, for after the completion of assembling the piston outer ring preheating in preheated zone, assembling piston outer ring and piston inner ring being integrated；
Automatic mobile device, piston outer ring be used to to assemble after and piston inner ring adjacent with assembly preheated zone, weld preheating region
One is moved to weld preheating region from assembly preheated zone；Controller, respectively with the first electromagnetic induction heating coil, second electricity
Magnetic induction heating coil, automatic assembling apparatus, automatic mobile device are connected, for controlling the first electromagnetic induction heating coil, the
The start and stop of two electromagnetic induction heating coils, automatic assembling apparatus, automatic mobile device.
In the technical scheme, by assembling preheated zone and weld preheating region, corresponding steel pistons portion can be placed
Part is conducive to the area of space that realization is provided for electromagnetic induction heating, and assembly preheating is positioned in piston inner ring and piston outer ring
When region, piston outer ring is covered by the first electromagnetic induction heating coil, electromagnetic heating is carried out to piston outer ring, piston outer ring is swollen
It is swollen, to be advantageously implemented the automatic assembling of piston outer ring and piston inner ring, and use electromagnetic induction heating, the first electromagnetism sense
It answers heating coil to directly heat piston outer ring, first heats electric heating element compared to conventional, electric-resistance heating furnace, then pass through radiant heating piston
Outer ring, heat utilization rate improve 30% or so, and energy conservation and environmental protection, when in addition starting relative to conventional, electric-resistance heating furnace furnace body and
Thermal insulation material can absorb a large amount of thermal energy, be also required to that certain temperature, electromagnetic induction heating is maintained to start when starting slowly, and not working
Faster, and after starting steel pistons preheating can be directly carried out, it is more efficient, it is more energy efficient, it is filled in piston inner ring and piston outer ring
When being moved to weld preheating region after matching, piston outer ring and piston inner ring are covered by the second electromagnetic induction heating coil, carried out
Electromagnetic heating can obtain higher power density, and the diathermanous time of piston is greatly shortened, and heating speed is fast, in sky
Surface oxide layer can reduce 80% or more relative to conventional, electric-resistance heating stove heat in gas, and the influence smaller to welding passes through
The automatic mobile device adjacent with assembly preheated zone, weld preheating region, realizes Automated assembly, instead of original high temperature
Under the conditions of manual operation, substantially increase safety, reduce the labor intensity of staff, by with assembly preheating zone
The adjacent automatic mobile device in domain, weld preheating region, can by after assembly piston outer ring and piston inner ring one from assembly
Preheated zone is moved to weld preheating region, the degree of automation higher, instead of the manual operation under original hot conditions, significantly
Improve safety, reduce the labor intensity of staff, by with the first electromagnetic induction heating coil, the second electromagnetic induction
The connected controller of heating coil, automatic assembling apparatus, automatic mobile device, can accurately control preheating temperature, preset duration,
Automatic assembling automatically moves, and pre- thermal mass is more stablized, and improves the degree of automation, and have greatly compared to resistance heating
Calorimetric amount radiates, and seriously affects the working environment of operating personnel, steel pistons preheating device proposed by the present invention is substantially to building ring
Border not adversely affects, and the degree of automation is stronger, reduces the labor intensity of staff, accurately controls simultaneously, technique
It is reproducible, product with stable quality.
Specifically, piston inner ring, piston outer ring are placed in assembly preheated zone, piston outer ring is on piston inner ring, control
Device processed control mobile first electromagnetic induction heating coil covering piston outer ring, start the first electromagnetic induction heating coil to piston outside
Circle carries out electromagnetic induction heating, and the temperature of electromagnetic induction heating is 200 ± 40 DEG C, and according to electromagnetic induction heating heat and piston
Outer ring preheats institute's calorific requirement to determine the heating duration of electromagnetic induction heating, when reaching heating duration, starts automatic assembling dress
It sets, is assembled, piston outer ring is turned, with being integrated, to start automatic mobile device, be moved to weld preheating area with piston inner ring
Domain, the mobile second electromagnetic induction heating coil covering of controller control is whole, starts the second electromagnetic induction heating coil and carries out electricity
Magnetic induction is heated, and the temperature of electromagnetic induction heating is 300 ± 10 DEG C, and according to needed for electromagnetic induction heating heat and whole preheating
Heat determines the heating duration of electromagnetic induction heating, when reaching heating duration, removes heating region before weldering, prepares Laser Welding
It connects.
In any of the above-described technical solution, it is preferable that the height of the first electromagnetic induction heating coil is not less than outside piston
The height of circle, the first electromagnetic induction heating coil are removable；The height of second electromagnetic induction heating coil is not less than piston outer ring
With the height of the assembly one of piston inner ring, the second electromagnetic induction coil moves.
In the technical scheme, the height of piston outer ring is not less than by the height of the first electromagnetic induction heating coil, the
One electromagnetic induction heating coil is removable, is advantageously implemented mobile first electromagnetic induction heating coil, piston outer ring is carried out complete
Covering is conducive to promote heating uniformity, and to Improving The Quality of Products, the height by the second electromagnetic induction heating coil is not small
Height in piston outer ring and the assembly one of piston inner ring, the second electromagnetic induction coil is removable, is conducive to mobile second electricity
The assembly of piston outer ring and piston inner ring is integrally carried out all standing by magnetic induction heating coil, is conducive to promote being heated evenly property,
And heating speed is lost, and influences smaller to welding.
In any of the above-described technical solution, it is preferable that automatic assembling apparatus includes：Platen, platen are placed in piston outer ring
Top, platen is removable, and platen is moved from the top down of piston outer ring, piston outer ring is pressed to piston inner ring, assembly is lived
Circle is integrated with piston inner ring beyond the Great Wall.
In the technical scheme, automatic assembling apparatus includes platen, can be moved by platen piston outer ring pressing to work
Inner ring is filled in, assembly piston outer ring is integrated with piston inner ring, simple and convenient, it can be achieved that property is strong.
In any of the above-described technical solution, it is preferable that further include：Automatic flushing device is electrically connected with controller, is used for
Before piston inner ring, piston outer ring are positioned over assembly preheated zone, piston inner ring, piston outer ring are cleaned；First surveys
Warm device is set to assembly preheated zone, is electrically connected with controller；Second temperature measuring equipment is set to weld preheating region, with controller
It is electrically connected.
It in the technical scheme, can be outside piston inner ring, piston by the automatic flushing device being electrically connected with controller
Circle is positioned over before assembly preheated zone, is cleaned to piston inner ring, piston outer ring, is conducive to promote product quality, be reduced
Influence of the impurity to welding of piston inner ring, piston outer ring, by being set to assembly preheated zone, first to be electrically connected with controller
Temperature measuring equipment can promote the temperature control accuracy when heating piston outer ring of assembly preheated zone, by being set to weld preheating
Region, the second temperature measuring equipment being electrically connected with controller can promote weld preheating region heating piston outer ring and piston inner ring
Temperature control accuracy when assembly one, is advantageously implemented and accurately controls, good process repeatability, and product with stable quality.
In any of the above-described technical solution, it is preferable that further include：Supply frequency adjuster, respectively with the first electromagnetism sense
Heating coil, the second electromagnetic induction heating coil is answered to be connected, for adjusting supply frequency, to control the first electromagnetic induction heating line
The heating intensity of circle, the second electromagnetic induction heating coil promotes being heated evenly property of piston.
In the technical scheme, by respectively with the first electromagnetic induction heating coil, the second electromagnetic induction heating coil phase
Supply frequency adjuster even, can adjust supply frequency, to the first electromagnetic induction heating coil of control, the second electromagnetic induction
The heating intensity of heating coil, promoted being heated evenly property of piston, supply frequency be according to piston specification, material, preheating temperature into
Row is determining, can store in advance different piston specifications, unlike material, different preheating temperatures and supply frequency mapping table,
It can be selected, to which rational supply frequency be provided, be conducive to accurately control, lifting process repeatability and product product
Matter stability.
The technical solution of the second aspect of the present invention proposes a kind of steel pistons pre-heating mean, including：Placement piston inner ring,
Piston outer ring is in assembly preheated zone, and piston outer ring is on piston inner ring；Mobile first electromagnetic induction heating coil covering is lived
It encloses beyond the Great Wall, and executes the first warm-up operation；When the first warm-up operation, which executes duration, is greater than or equal to the first preset duration, terminate
First warm-up operation, and automatic assembling piston outer ring and piston inner ring are integrated；By after assembly piston outer ring and piston inner ring
One is moved to weld preheating region by assembling preheated zone automatically；Mobile second electromagnetic induction heating coil covering piston outer ring
It is integrated with piston inner ring, and execute the second warm-up operation；When the second warm-up operation execution duration is default more than or equal to second
When long, terminate the second warm-up operation, prepares laser welding.
In the technical scheme, by placing piston inner ring, piston outer ring in assembly preheated zone, piston outer ring is in piston
On inner ring, mobile first electromagnetic induction heating coil covering piston outer ring, and the first warm-up operation is executed, it realizes to piston
Outer ring carries out electromagnetic heating, and piston outer ring expands, to be advantageously implemented the automatic assembling of piston outer ring and piston inner ring, and
Using electromagnetic induction heating, the first electromagnetic induction heating coil directly heats piston outer ring, first adds compared to conventional, electric-resistance heating furnace
Electric heating body, then by radiant heating piston outer ring, heat utilization rate improves 30% or so, and energy conservation and environmental protection, in addition relatively
Furnace body and thermal insulation material can absorb a large amount of thermal energy when conventional, electric-resistance heating furnace starts, and be also required to when starting slowly, and not working
Certain temperature is maintained, electromagnetic induction heating starts faster, and can directly carry out steel pistons preheating after starting, more efficient,
It is more energy efficient, later when the first warm-up operation, which executes duration, is greater than or equal to the first preset duration, terminate the first warm-up operation, and
Automatic assembling piston outer ring and piston inner ring are integrated, and realize Automated assembly, instead of artificial under original hot conditions
Operation, substantially increase safety, reduce the labor intensity of staff, by after assembly piston outer ring and piston inner ring one
Body is moved to weld preheating region by assembling preheated zone automatically, mobile second electromagnetic induction heating coil covering piston outer ring and
Piston inner ring one, and the second warm-up operation is executed, it realizes to piston outer ring and piston inner ring one, carries out electromagnetic heating,
Higher power density can be obtained, the diathermanous time of piston is greatly shortened, heating speed is fast, thus Surface Oxygen in air
80% or more can be reduced relative to conventional, electric-resistance heating stove heat by changing layer, the influence smaller to welding, by when the second preheating
When operation executes duration more than or equal to the second preset duration, terminate the second warm-up operation, prepares laser welding, the degree of automation
Higher substantially increases safety instead of the manual operation under original hot conditions, and the labour for reducing staff is strong
Degree, accurately controls, good process repeatability, product with stable quality simultaneously.
In the above-mentioned technical solutions, it is preferable that the preheating temperature of the first warm-up operation is 160 DEG C~240 DEG C.
In the technical scheme, it is 160 DEG C~240 DEG C by the preheating temperature of the first warm-up operation, on the one hand, ensure
Enough heats are provided for the expansion of piston outer ring, are conducive to automatic assembling, on the other hand, also energy conservation and environmental protection.
In any of the above-described technical solution, it is preferable that the preheating temperature of the second warm-up operation is 290 DEG C~310 DEG C.
In the technical scheme, it is 290 DEG C~310 DEG C by the preheating temperature of the second warm-up operation, on the one hand, ensure
Enough heats are integrally provided for piston outer ring and piston inner ring, are conducive to weld, on the other hand, also energy conservation and environmental protection.
In any of the above-described technical solution, it is preferable that the first preset duration is according to heat needed for the assembly preheating of piston outer ring
Amount and the first electromagnetic induction heating coil sensing heating heat determine；Second preset duration according to after assembly piston outer ring and
One body heat content of piston inner ring and the second electromagnetic induction heating coil sensing heating heat determine.
In the technical scheme, the first preset duration assembles preheating institute's calorific requirement and the first electromagnetism sense according to piston outer ring
Answer heating coil sensing heating heat determining and the second preset duration according to after assembly piston outer ring and piston inner ring one
Heat and the second electromagnetic induction heating coil sensing heating heat determine, realize and accurately control, are conducive to lifting process weight
Renaturation and product with stable quality.
In any of the above-described technical solution, it is preferable that place piston inner ring, piston outer ring in assembly preheated zone it
Before, further include：Cleaning piston inner ring and piston outer ring.
In the technical scheme, by placing piston inner ring, piston outer ring before assembling preheated zone, cleaning piston
Inner ring and piston outer ring are conducive to promote product quality, reduce influence of the impurity to welding of piston inner ring, piston outer ring, into
One step promotes product quality.
The technical solution of the third aspect of the present invention proposes a kind of computer equipment, and computer equipment includes processor,
Processor realizes the technical solution such as above-mentioned the second aspect of the present invention when being used to execute the computer program stored in memory
The step of steel pistons pre-heating mean of any one of proposition.
In the technical scheme, computer equipment includes processor, and processor is for executing the calculating stored in memory
The step of the steel pistons pre-heating mean for any one that the technical solution such as above-mentioned the second aspect of the present invention proposes is realized when machine program
Suddenly, therefore the whole of the steel pistons pre-heating mean of any one of the technical solution of the second aspect with aforementioned present invention proposition has
Beneficial effect, details are not described herein.
The technical solution of the fourth aspect of the present invention proposes a kind of computer readable storage medium, is stored thereon with calculating
Machine program realizes the steel for any one that the technical solution of the second aspect of the present invention proposes when computer program is executed by processor
The step of piston pre-heating mean.
In the technical scheme, computer readable storage medium, is stored thereon with computer program, and computer program is located
Reason device realizes the step of steel pistons pre-heating mean for any one that the technical solution of the second aspect of the present invention proposes when executing, because
The steel pistons pre-heating mean for any one that the technical solution of this second aspect with aforementioned present invention proposes all beneficial to imitating
Fruit, details are not described herein.
By above technical scheme, using electromagnetic induction heating, electromagnetic induction heating coil directly heats piston, compared to general
Logical resistance-heated furnace first heats electric heating element, then by radiant heating piston, and heat utilization rate improves 30% or so, and energy-saving ring
It protects, higher power density can be obtained, the diathermanous time of piston is greatly shortened, heating speed is fast, thus table in air
Face oxide layer can reduce 80% or more relative to conventional, electric-resistance heating stove heat, the influence smaller to welding, realize automatic
Makeup is matched, and instead of the manual operation under original hot conditions, substantially increases safety, and the labour for reducing staff is strong
Degree, accurately controls, good process repeatability, product with stable quality simultaneously.
The additional aspect and advantage of the present invention will provide in following description section, will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 shows the structural schematic diagram of steel pistons preheating device according to an embodiment of the invention；
Fig. 2 shows the structural schematic diagrams at A in Fig. 1；
Fig. 3 shows the structural schematic diagram at B in Fig. 1；
Fig. 4 shows the flow diagram of steel pistons pre-heating mean according to an embodiment of the invention；
Fig. 5 shows the flow diagram of steel pistons pre-heating mean according to an embodiment of the invention,
Wherein, the correspondence in Fig. 1 to Fig. 3 between reference numeral and component is：
102 assembly preheated zones, 104 weld preheating regions, 106 first electromagnetic induction heating coils, 108 second electromagnetism senses
Answer heating coil, 110 piston outer rings, 112 piston inner rings, 114 automatic assembling apparatus, 1142 platens, 116 automatic mobile devices,
118 controllers, 120 automatic flushing devices, 122 first temperature measuring equipments, 124 second temperature measuring equipments, 126 supply frequency adjusters.
Specific implementation mode
To better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real
Mode is applied the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be implemented different from other modes described here using other, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
As shown in Figure 1 to Figure 3, steel pistons preheating device according to an embodiment of the invention, including：Assemble preheated zone
102 and weld preheating region 104, preheated zone 102 and weld preheating region 104 are assembled for placing corresponding steel pistons portion
Part, steel pistons component include piston inner ring 112 and piston outer ring 110；First electromagnetic induction heating coil 106, in piston inner ring
112 and piston outer ring 110 when being positioned over assembly preheated zone 102, the first electromagnetic induction heating coil 106 covers piston outer ring
110, electromagnetic heating is carried out to piston outer ring 110；Second electromagnetic induction heating coil 108, in piston inner ring 112 and piston outer ring
When being moved to weld preheating region 104 after 110 assembly, the second electromagnetic induction heating coil 108 covers piston outer ring 110 and piston
Inner ring 112 carries out electromagnetic heating；Automatic assembling apparatus 114, it is adjacent with assembly preheated zone 102, in assembly preheated zone
After the completion of piston outer ring 110 in 102 preheats, assembly piston outer ring 110 and piston inner ring 112 are integrated；Automatic mobile device
116, piston outer ring 110 be used to to assemble after and piston inner ring adjacent with assembly preheated zone 102, weld preheating region 104
112 one are moved to weld preheating region 104 from assembly preheated zone 102；Controller 118 adds with the first electromagnetic induction respectively
Heat coil 106, the second electromagnetic induction heating coil 108, automatic assembling apparatus 114, automatic mobile device 116 are connected, for controlling
It makes the first electromagnetic induction heating coil 106, the second electromagnetic induction heating coil 108, automatic assembling apparatus 114, automatically move dress
Set 116 start and stop.
In this embodiment, by assembling preheated zone 102 and weld preheating region 104, corresponding steel can be placed and lived
Plunger member is conducive to the area of space that realization is provided for electromagnetic induction heating, is placed in piston inner ring 112 and piston outer ring 110
When assembling preheated zone 102, piston outer ring 110 is covered by the first electromagnetic induction heating coil 106, to piston outer ring 110
Electromagnetic heating is carried out, piston outer ring 110 expands, to be advantageously implemented the automatic dress of piston outer ring 110 and piston inner ring 112
Match, and use electromagnetic induction heating, the first electromagnetic induction heating coil 106 directly heats piston outer ring 110, compared to common electricity
Resistance heating furnace first heats electric heating element, then by radiant heating piston outer ring 110, and heat utilization rate improves 30% or so, Er Qiejie
Can be environmentally friendly, furnace body and thermal insulation material can absorb a large amount of thermal energy when in addition starting relative to conventional, electric-resistance heating furnace, start slowly, and
It is also required to maintain certain temperature when not working, electromagnetic induction heating starts faster, and can directly carry out steel pistons after starting
Preheating, it is more efficient, it is more energy efficient, when being moved to weld preheating region 104 after piston inner ring 112 and piston outer ring 110 assemble,
Piston outer ring 110 and piston inner ring 112 are covered by the second electromagnetic induction heating coil 108, electromagnetic heating is carried out, can obtain
The diathermanous time of piston is greatly shortened in higher power density, and heating speed is fast, to which surface oxide layer is opposite in air
In conventional, electric-resistance heating stove heat can reduce 80% or more, the influence smaller to welding, by with assembly preheated zone 102,
The adjacent automatic mobile device 116 in weld preheating region 104, realizes Automated assembly, instead of under original hot conditions
Manual operation substantially increases safety, reduces the labor intensity of staff, by with assembly preheated zone 102, weldering before
The adjacent automatic mobile device 116 in preheated zone 104, can by after assembly piston outer ring 110 and the one of piston inner ring 112 from
Assembly preheated zone 102 is moved to weld preheating region 104, the degree of automation higher, instead of the people under original hot conditions
Work operate, substantially increase safety, reduce the labor intensity of staff, by with the first electromagnetic induction heating coil
106, the connected controller 118 of the second electromagnetic induction heating coil 108, automatic assembling apparatus 114, automatic mobile device 116, can
To accurately control preheating temperature, preset duration, automatic assembling, automatically move, pre- thermal mass is more stablized, and automation journey is improved
Degree, and amount of heat radiation is had compared to resistance heating, the working environment of operating personnel is seriously affected, it is proposed by the present invention
Steel pistons preheating device substantially not adversely affects working environment, and the degree of automation is stronger, reduces staff's
Labor intensity accurately controls simultaneously, good process repeatability, product with stable quality.
Specifically, piston inner ring 112, piston outer ring 110 are placed in assembly preheated zone 102, piston outer ring 110 is in piston
On inner ring 112, the control of controller 118 mobile first electromagnetic induction heating coil 106 covering piston outer ring 110 starts first
Electromagnetic induction heating coil 106 carries out electromagnetic induction heating to piston outer ring 110, and the temperature of electromagnetic induction heating is 200 ± 40
DEG C, and when preheating heating of institute's calorific requirement to determine electromagnetic induction heating according to electromagnetic induction heating heat and piston outer ring 110
It is long, when reaching heating duration, start automatic assembling apparatus 114, assembled, by 112 turns of piston outer ring 110 and piston inner ring
With being integrated, start automatic mobile device 116, is moved to weld preheating region 104, mobile second electromagnetism of the control of controller 118
Load coil 108 covers entirety, starts the second electromagnetic induction heating coil 108 and carries out electromagnetic induction heating, electromagnetic induction
The temperature of heating is 300 ± 10 DEG C, and determines electromagnetic induction according to electromagnetic induction heating heat and whole preheating institute's calorific requirement
The heating duration of heating removes heating region before weldering when reaching heating duration, prepares laser welding.
The height of first electromagnetic induction heating coil 106 is not less than the height of piston outer ring 110, the first electromagnetic induction heating
Coil 106 is removable；The height of second electromagnetic induction heating coil 108 is not less than the dress of piston outer ring 110 and piston inner ring 112
Height with one, the second electromagnetic induction coil are removable.
In this embodiment, the height of piston outer ring 110 is not less than by the height of the first electromagnetic induction heating coil 106
Degree, the first electromagnetic induction heating coil 106 is removable, mobile first electromagnetic induction heating coil 106 is advantageously implemented, by piston
Outer ring 110 carries out all standing, is conducive to promote heating uniformity, to Improving The Quality of Products, passes through the second electromagnetic induction heating
The height of coil 108 is not less than the height of piston outer ring 110 and the assembly one of piston inner ring 112, the second electromagnetic induction coil
It is removable, be conducive to assembly one of mobile second electromagnetic induction heating coil 108 by piston outer ring 110 and piston inner ring 112
All standing is carried out, is conducive to promote being heated evenly property, and heating speed is lost, smaller is influenced on welding.
As depicted in figs. 1 and 2, automatic assembling apparatus 114 includes：Platen 1142, platen 1142 are placed in piston outer ring 110
Top, platen 1142 is removable, and platen 1142 is moved from the top down of piston outer ring 110, and piston outer ring 110 is pressed to piston
Inner ring 112, assembly piston outer ring 110 are integrated with piston inner ring 112.
In this embodiment, automatic assembling apparatus 114 includes platen 1142, and can be moved by platen 1142 will be outside piston
Circle 110 presses to piston inner ring 112, and assembly piston outer ring 110 is integrated with piston inner ring 112, simple and convenient, it can be achieved that property is strong.
As shown in Figure 1, steel pistons preheating device further includes：Automatic flushing device 120 is electrically connected with controller 118, is used for
Before piston inner ring 112, piston outer ring 110 are positioned over assembly preheated zone 102, to piston inner ring 112, piston outer ring 110
It is cleaned；First temperature measuring equipment 122 is set to assembly preheated zone 102, is electrically connected with controller 118；Second temperature measuring equipment
124, it is set to weld preheating region 104, is electrically connected with controller 118.
It in this embodiment, can be in piston inner ring by the automatic flushing device 120 being electrically connected with controller 118
112, piston outer ring 110 is positioned over before assembly preheated zone 102, cleans, has to piston inner ring 112, piston outer ring 110
Conducive to product quality is promoted, influence of the impurity to welding of piston inner ring 112, piston outer ring 110 is reduced, it is pre- by being set to assembly
Thermal region 102, the first temperature measuring equipment 122 being electrically connected with controller 118 can promote assembly preheated zone 102 and heat piston
Temperature control accuracy when outer ring 110, by being set to weld preheating region 104, the second thermometric for being electrically connected with controller 118
Device 124 can promote the temperature control when heating piston outer ring of weld preheating region 104 110 assembles one with piston inner ring 112
Accuracy processed, is advantageously implemented and accurately controls, good process repeatability, and product with stable quality.
As shown in Figure 1, steel pistons preheating device further includes：Supply frequency adjuster 126 adds with the first electromagnetic induction respectively
Heat coil 106, the second electromagnetic induction heating coil 108 are connected, for adjusting supply frequency, to control the first electromagnetic induction heating
The heating intensity of coil 106, the second electromagnetic induction heating coil 108 promotes being heated evenly property of piston.
In this embodiment, by respectively with the first electromagnetic induction heating coil 106, the second electromagnetic induction heating coil
108 connected supply frequency adjusters 126, can adjust supply frequency, thus the first electromagnetic induction heating coil 106 of control,
The heating intensity of second electromagnetic induction heating coil 108, promoted being heated evenly property of piston, supply frequency be according to piston specification,
Material, preheating temperature are determined, and can store different piston specifications, unlike material, different preheating temperatures and power supply frequency in advance
The mapping table of rate can be selected, and to which rational supply frequency be provided, be conducive to accurately control, lifting process
Repeatability and product with stable quality.
As shown in figure 4, steel pistons pre-heating mean according to an embodiment of the invention, including：
S402 places piston inner ring, piston outer ring in assembly preheated zone, and piston outer ring is on piston inner ring；
S404, mobile first electromagnetic induction heating coil covering piston outer ring, and execute the first warm-up operation；
S406 terminates the first warm-up operation when the first warm-up operation, which executes duration, is greater than or equal to the first preset duration,
And automatic assembling piston outer ring and piston inner ring are integrated；
S408, by after assembly piston outer ring and piston inner ring one be moved to weld preheating by assembling preheated zone automatically
Region；
S410, mobile second electromagnetic induction heating coil covering piston outer ring and piston inner ring one, and it is pre- to execute second
Heat operation；
S412 terminates the second warm-up operation when the second warm-up operation, which executes duration, is greater than or equal to the second preset duration,
Prepare laser welding.
In this embodiment, by placing piston inner ring, piston outer ring in assembly preheated zone, piston outer ring is in piston
On circle, mobile first electromagnetic induction heating coil covering piston outer ring, and the first warm-up operation is executed, it realizes outside to piston
Circle carries out electromagnetic heating, and the expansion of piston outer ring to be advantageously implemented the automatic assembling of piston outer ring and piston inner ring, and is adopted
With electromagnetic induction heating, the first electromagnetic induction heating coil directly heats piston outer ring, is first heated compared to conventional, electric-resistance heating furnace
Electric heating element, then by radiant heating piston outer ring, heat utilization rate improves 30% or so, and energy conservation and environmental protection, in addition relative to
Furnace body and thermal insulation material can absorb a large amount of thermal energy when conventional, electric-resistance heating furnace starts, and be also required to tie up when starting slowly, and not working
Certain temperature is held, electromagnetic induction heating starts faster, and can directly carry out steel pistons preheating after starting, more efficient, more
It is energy saving, later when the first warm-up operation, which executes duration, is greater than or equal to the first preset duration, terminate the first warm-up operation, and certainly
Dynamic assembly piston outer ring and piston inner ring are integrated, and Automated assembly are realized, instead of the artificial behaviour under original hot conditions
Make, substantially increase safety, reduce the labor intensity of staff, by after assembly piston outer ring and piston inner ring one
Automatically weld preheating region, mobile second electromagnetic induction heating coil covering piston outer ring and work are moved to by assembling preheated zone
Inner ring one is filled in, and executes the second warm-up operation, realizes to piston outer ring and piston inner ring one, carries out electromagnetic heating, it can
To obtain higher power density, the diathermanous time of piston is greatly shortened, heating speed is fast, thus surface oxidation in air
Layer can reduce 80% or more relative to conventional, electric-resistance heating stove heat, the influence smaller to welding, by being grasped when the second preheating
When making to execute duration more than or equal to the second preset duration, terminate the second warm-up operation, prepares laser welding, the degree of automation is more
Height substantially increases safety instead of the manual operation under original hot conditions, reduces the labor intensity of staff,
It accurately controls simultaneously, good process repeatability, product with stable quality.
In the above embodiment, it is preferable that the preheating temperature of the first warm-up operation is 160 DEG C~240 DEG C.
In this embodiment, it is 160 DEG C~240 DEG C by the preheating temperature of the first warm-up operation, on the one hand, ensured and be
The expansion of piston outer ring provides enough heats, is conducive to automatic assembling, another aspect, also energy conservation and environmental protection.
In any of the above-described embodiment, it is preferable that the preheating temperature of the second warm-up operation is 290 DEG C~310 DEG C.
In this embodiment, it is 290 DEG C~310 DEG C by the preheating temperature of the second warm-up operation, on the one hand, ensured and be
Piston outer ring and piston inner ring integrally provide enough heats, are conducive to weld, another aspect, also energy conservation and environmental protection.
In any of the above-described embodiment, it is preferable that the first preset duration assembles preheating institute calorific requirement according to piston outer ring
And first electromagnetic induction heating coil sensing heating heat determine；Second preset duration according to after assembly piston outer ring and work
It fills in one body heat content of inner ring and the second electromagnetic induction heating coil sensing heating heat determines.
In this embodiment, the first preset duration assembles preheating institute's calorific requirement and the first electromagnetic induction according to piston outer ring
Heating coil sensing heating heat is determining and the second preset duration is according to one body heat of piston outer ring and piston inner ring after assembly
Amount and the second electromagnetic induction heating coil sensing heating heat determine, realize and accurately control, and are conducive to lifting process repetition
Property and product with stable quality.
In any of the above-described embodiment, it is preferable that place piston inner ring, piston outer ring in assembly preheated zone it
Before, further include：Cleaning piston inner ring and piston outer ring.
In this embodiment, by placing piston inner ring, piston outer ring before assembling preheated zone, in cleaning piston
Circle and piston outer ring are conducive to promote product quality, influence of the impurity to welding of piston inner ring, piston outer ring are reduced, into one
Step promotes product quality.
As shown in figure 5, steel pistons pre-heating mean according to an embodiment of the invention, including：
S502, according to drawing requirement machining piston outer ring and piston inner ring, the welding surface on piston outer ring and piston inner ring
Within 0.1mm, roughness controls between Ra3.2~Ra10 dimension control；
S504, cleaning piston inner ring and piston outer ring；
S506 places piston inner ring, piston outer ring in assembly preheated zone, and piston outer ring is on piston inner ring；
S508, mobile first electromagnetic induction heating coil covering piston outer ring, and execute the first warm-up operation, preheating temperature
200±40℃；
S510 terminates the first warm-up operation when the first warm-up operation, which executes duration, is greater than or equal to the first preset duration,
And automatic assembling piston outer ring and piston inner ring are integrated；
S512, by after assembly piston outer ring and piston inner ring one be moved to weld preheating by assembling preheated zone automatically
Region；
S514, mobile second electromagnetic induction heating coil covering piston outer ring and piston inner ring one, and it is pre- to execute second
Heat operation, 300 ± 10 DEG C of preheating temperature；
S516 terminates the second warm-up operation when the second warm-up operation, which executes duration, is greater than or equal to the second preset duration,
Prepare laser welding.
Computer equipment according to an embodiment of the invention, computer equipment include processor, and processor is deposited for executing
The steel pistons pre-heating mean of any one proposed such as embodiments of the invention described above is realized when the computer program stored in reservoir
The step of.
In this embodiment, computer equipment includes processor, and processor is for executing the computer stored in memory
The step of steel pistons pre-heating mean of any one proposed such as embodiments of the invention described above is realized when program, therefore with above-mentioned
Whole advantageous effects of the steel pistons pre-heating mean for any one that the embodiment of the present invention proposes, details are not described herein.
Computer readable storage medium according to an embodiment of the invention is stored thereon with computer program, computer journey
The step of steel pistons pre-heating mean for any one that embodiments of the invention described above propose is realized when sequence is executed by processor.
In this embodiment, computer readable storage medium, is stored thereon with computer program, and computer program is handled
The step of steel pistons pre-heating mean for any one that embodiments of the invention described above propose is realized when device executes, therefore with above-mentioned
Whole advantageous effects of the steel pistons pre-heating mean for any one that the embodiment of the present invention proposes, details are not described herein.
Technical scheme of the present invention is described in detail above in association with attached drawing, the present invention proposes a kind of steel pistons preheating device
With a kind of steel pistons pre-heating mean, by using electromagnetic induction heating, electromagnetic induction heating coil directly heats piston, compared to general
Logical resistance-heated furnace first heats electric heating element, then by radiant heating piston, and heat utilization rate improves 30% or so, and energy-saving ring
It protects, higher power density can be obtained, the diathermanous time of piston is greatly shortened, heating speed is fast, thus table in air
Face oxide layer can reduce 80% or more relative to conventional, electric-resistance heating stove heat, the influence smaller to welding, realize automatic
Makeup is matched, and instead of the manual operation under original hot conditions, substantially increases safety, and the labour for reducing staff is strong
Degree, accurately controls, good process repeatability, product with stable quality simultaneously.
Step in the method for the present invention can be sequentially adjusted, combined, and deleted according to actual needs.
Unit in apparatus of the present invention can be combined, divided, and deleted according to actual needs.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium include read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory,
RAM), programmable read only memory (Programmable Read-only Memory, PROM), erasable programmable is read-only deposits
Reservoir (Erasable Programmable Read Only Memory, EPROM), disposable programmable read-only memory (One-
Time Programmable Read-Only Memory, OTPROM), the electronics formula of erasing can make carbon copies read-only memory
(Electrically-Erasable Programmable Read-Only Memory, EEPROM), CD-ROM (Compact
Disc Read-Only Memory, CD-ROM) or other disk storages, magnetic disk storage, magnetic tape storage or can
Any other computer-readable medium for carrying or storing data.
In the present invention, term " first ", " second ", " third " are only used for the purpose of description, and should not be understood as indicating
Or imply relative importance；Term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " installation ",
The terms such as " connected ", " connection ", " fixation " shall be understood in a broad sense, for example, " connection " may be a fixed connection, can also be can
Dismantling connection, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.For this
For the those of ordinary skill in field, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In description of the invention, it is to be understood that the instructions such as term "upper", "lower", "left", "right", "front", "rear"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched
It states, specific direction must be had, with specific azimuth configuration and operation by not indicating or implying the indicated device or unit,
It is thus impossible to be interpreted as limitation of the present invention.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the present invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of steel pistons preheating device, which is characterized in that including：
Preheated zone and weld preheating region are assembled, the assembly preheated zone and the weld preheating region are corresponding for placing
Steel pistons component, the steel pistons component includes piston inner ring and piston outer ring；
First electromagnetic induction heating coil is positioned over the assembly preheated zone in the piston inner ring and the piston outer ring
When, first electromagnetic induction heating coil covers the piston outer ring, and electromagnetic heating is carried out to the piston outer ring；
Second electromagnetic induction heating coil is moved to the weld preheating after the piston inner ring and piston outer ring assembly
When region, second electromagnetic induction heating coil covers the piston outer ring and the piston inner ring, carries out electromagnetic heating；
Automatic assembling apparatus, it is adjacent with the assembly preheated zone, for outside the piston assembled in preheated zone
After the completion of circle preheating, assembles the piston outer ring and the piston inner ring is integrated；
Automatic mobile device, it is adjacent with the assembly preheated zone, the weld preheating region, for the work after assembling
Circle and piston inner ring one are moved to the weld preheating region from the assembly preheated zone beyond the Great Wall；
Controller, respectively with first electromagnetic induction heating coil, second electromagnetic induction heating coil, the automatic dress
It is connected with device, the automatic mobile device, for controlling first electromagnetic induction heating coil, second electromagnetic induction
The start and stop of heating coil, the automatic assembling apparatus, the automatic mobile device.
2. steel pistons preheating device according to claim 1, which is characterized in that
The height of first electromagnetic induction heating coil is not less than the height of the piston outer ring, and first electromagnetic induction adds
Heat coil is removable；
Height of the height of second electromagnetic induction heating coil not less than the piston outer ring and the assembly one of the piston inner ring
Degree, second electromagnetic induction coil are removable.
3. steel pistons preheating device according to claim 2, which is characterized in that the automatic assembling apparatus includes：
Platen, the platen are placed in the top of the piston outer ring, and the platen is removable, and the platen is from the piston outer ring
Top down movement, the piston outer ring is pressed into the piston inner ring, assembles the piston outer ring and the piston inner ring
It is integrated.
4. steel pistons preheating device according to claim 3, which is characterized in that further include：
Automatic flushing device is electrically connected with the controller, described for being positioned in the piston inner ring, the piston outer ring
Before assembling preheated zone, the piston inner ring, the piston outer ring are cleaned；
First temperature measuring equipment is set to the assembly preheated zone, is electrically connected with the controller；
Second temperature measuring equipment is set to the weld preheating region, is electrically connected with the controller.
5. steel pistons preheating device according to claim 4, which is characterized in that further include：
Supply frequency adjuster, respectively with first electromagnetic induction heating coil, the second electromagnetic induction heating coil phase
Even, for adjusting supply frequency, to control first electromagnetic induction heating coil, second electromagnetic induction heating coil
Heating intensity promotes being heated evenly property of piston.
6. a kind of steel pistons pre-heating mean, which is characterized in that including：
Piston inner ring, piston outer ring are placed in assembly preheated zone, the piston outer ring is on the piston inner ring；
Mobile first electromagnetic induction heating coil covers the piston outer ring, and executes the first warm-up operation；
When first warm-up operation, which executes duration, is greater than or equal to the first preset duration, terminate first warm-up operation,
And piston outer ring described in automatic assembling and the piston inner ring are integrated；
By after assembly the piston outer ring and the piston inner ring integrally weldering is moved to by the assembly preheated zone automatically before
Preheated zone；
Mobile second electromagnetic induction heating coil covers the piston outer ring and piston inner ring one, and executes the second preheating
Operation；
When second warm-up operation, which executes duration, is greater than or equal to the second preset duration, terminate second warm-up operation,
Prepare laser welding.
7. steel pistons pre-heating mean according to claim 6, which is characterized in that
The preheating temperature of first warm-up operation is 160 DEG C~240 DEG C.
8. steel pistons pre-heating mean according to claim 7, which is characterized in that
The preheating temperature of second warm-up operation is 290 DEG C~310 DEG C.
9. the steel pistons pre-heating mean according to any one of claim 6 to 8, which is characterized in that
First preset duration assembles preheating institute's calorific requirement and first electromagnetic induction heating according to the piston outer ring
Coil-induced heating heat determines；
Second preset duration according to after assembly the piston outer ring and the piston the inner ring integrally heat and institute
State the determination of the second electromagnetic induction heating coil sensing heating heat.
10. steel pistons pre-heating mean according to claim 9, which is characterized in that outside the placement piston inner ring, piston
It encloses before assembling preheated zone, further includes：
Clean the piston inner ring and the piston outer ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810508873.1A CN108544183B (en) | 2018-05-24 | Steel piston preheating device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810508873.1A CN108544183B (en) | 2018-05-24 | Steel piston preheating device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108544183A true CN108544183A (en) | 2018-09-18 |
| CN108544183B CN108544183B (en) | 2024-08-13 |
Family
ID=
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| CN108927618A (en) * | 2018-10-09 | 2018-12-04 | 湖北天图桥梁技术研究有限公司 | A kind of silent floor element solder preheating device and the method for control welding thermal deformation |
| CN112475683A (en) * | 2020-11-24 | 2021-03-12 | 中车大连机车车辆有限公司 | Device and method for preheating circumferential weld joint and heating and slow cooling |
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