CN110000319A - A kind of band skirt non-hardened and tempered steel piston forging and forming technology - Google Patents
A kind of band skirt non-hardened and tempered steel piston forging and forming technology Download PDFInfo
- Publication number
- CN110000319A CN110000319A CN201910225583.0A CN201910225583A CN110000319A CN 110000319 A CN110000319 A CN 110000319A CN 201910225583 A CN201910225583 A CN 201910225583A CN 110000319 A CN110000319 A CN 110000319A
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- piston
- hardened
- forging
- temperature control
- tempered steel
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
Abstract
The step of the invention discloses a kind of band skirt non-hardened and tempered steel piston forging and forming technologies, are related to the manufacturing technology field of non-hardened and tempered steel piston, the forging and forming technology are as follows: (1) simultaneously blanking is examined in sorting；(2) it heats；(3) jumping-up；(4) blocking；(5) finish-forging；(6) temperature control is cooling；(7) ball blast；(8) visual examination and magnetic powder inspection；(9) then antirust treatment is packed and stored.The present invention uses completely new forging technology design, solves that existing piston forging process is long, and the low problem of production efficiency, technical process is shortened, and production efficiency improves；The cooling mechanical property for guaranteeing product of temperature control, while there is energy-saving and environment-friendly effect；Forging piston has high safety and reliability, improves power of IC engine and realizes the advantage of energy-saving and emission-reduction.
Description
Technical field
The present invention relates to the manufacturing technology fields of non-hardened and tempered steel piston, more particularly to a kind of band skirt non-hardened and tempered steel piston
Forging and forming technology.
Background technique
Piston is parts reciprocating in Motor Engine Cylinder body.The basic structure of piston can be divided into top, head
Portion and skirt section.Top land is the major part for forming combustion chamber, and shape is related with selected combustion-chamber shape.Gasoline engine
Flat-head piston is mostly used, its advantage is that endotherm area is small.Piston generally has two kinds of production methods of casting and forging.Due to internal combustion engine
The working condition of piston often deteriorate drastically in the raising of maximum outbreak pressure and power per liter, reduces the safe and reliable of piston
Property, and as state's intrinsic motivation policy constantly adjusts, the discharge standard of engine is adjusted, engine will increase reinforcing
Index, therefore, traditional cast aluminium alloy gold piston are no longer satisfied the requirement of present social development；Existing forging piston
Technical process it is longer, production efficiency is low；The utilization rate of raw materials for forging piston simultaneously is relatively low.
Summary of the invention
It is forged into the object of the invention is that providing a kind of band skirt non-hardened and tempered steel piston to solve the above-mentioned problems
Shape technique.
The present invention through the following technical solutions to achieve the above objectives:
A kind of band skirt non-hardened and tempered steel piston forging and forming technology, the forging and forming technology the following steps are included:
(1) it tests to non-hardened and tempered steel bar, chooses excellent non-hardened and tempered steel bar, it then according to predetermined size will be non-
Quenched and tempered steel bar is cut into fixed length section, referred to as non-hardened and tempered steel section；
(2) non-hardened and tempered steel section batch is put into heating furnace and is heated, then kept the temperature, so that non-hardened and tempered steel section center portion temperature
Degree is consistent with external stabilization degree；
(3) the non-hardened and tempered steel section that isothermal holding is crossed is taken out out of heating furnace and is placed on convex recessed swage block and carry out jumping-up
Processing；
(4) by jumping-up, treated that non-hardened and tempered steel section is put into Preform Die carries out closed die forging, obtains blocking blank；
(5) blocking blank is put into finish-forging die and carries out closed die forging, obtain piston semi-finished product；
(6) piston semi-finished product are put into progress temperature control cooling treatment in temperature control furnace, take piston semi-finished product after temperature control is cooling
Out, piston semi-finished product, are finally put into material frame by then air-cooled processing；
(7) piston semi-finished product being subjected to Shot Blasting, removal piston surface of semi-finished oxide skin impurity improves presentation quality,
Obtain piston finished product；
(8) appearance of piston finished product is checked, and carries out magnetic powder inspection, there are the pistons of mass defect for discovery in time
Finished product；
(9) antirust treatment is carried out to the second best in quality piston finished product, then piston finished product is packed and stored.
Preferably, the heating temperature in the step (2) is 1245~1255 DEG C, and holding temperature is 1230~1240 DEG C.
Preferably, the temperature control that jumping-up is handled in the step (3) is 1173~1193 DEG C.
Preferably, the temperature control of blocking is 1130~1150 DEG C in the step (4).
Preferably, the temperature control of finish-forging is 1120~1140 DEG C in the step (5).
Preferably, temperature control when being put into temperature control furnace in the step (6) is 830~850 DEG C, when taking out temperature control furnace
Temperature control is 410~430 DEG C, and temperature control is 241~261 DEG C when piston semi-finished product are put into material frame.
The beneficial effects of the present invention are: the present invention uses completely new forging technology design, solves existing piston forging
Process is long, and the low problem of production efficiency, technical process is shortened, and production efficiency improves；The cooling mechanics for guaranteeing product of temperature control
Performance, while there is energy-saving and environment-friendly effect；Forging piston has high safety and reliability, improves power of IC engine and realizes energy conservation
The advantage of emission reduction；UTILIZATION OF VESIDUAL HEAT IN, energy conservation and environmental protection reduce production cost；Using closed-die forging, overlap is not generated, improves raw material
Utilization rate.
Detailed description of the invention
Fig. 1 is the stress-strain curve diagram of converted products of the present invention.
Specific embodiment
Embodiment 1
A kind of band skirt non-hardened and tempered steel piston forging and forming technology, comprising the following steps: (1) non-hardened and tempered steel bar is carried out
It examines, chooses excellent non-hardened and tempered steel bar, non-hardened and tempered steel bar is then cut into fixed length section according to predetermined size, referred to as non-tune
Matter steel section；(2) non-hardened and tempered steel section batch is put into heating furnace and is heated, heating temperature is 1245 DEG C, is then kept the temperature, and is kept the temperature
Temperature is 1230 DEG C, so that non-hardened and tempered steel section center portion temperature is consistent with external stabilization degree；(3) the non-tune for crossing isothermal holding
Progress jumping-up processing on convex recessed swage block is taken out out of heating furnace and be placed on to matter steel section, and the temperature control of jumping-up processing is 1173
℃；(4) by jumping-up, treated that non-hardened and tempered steel section is put into Preform Die carries out closed die forging, and the temperature control of blocking is 1130
DEG C, obtain blocking blank；(5) blocking blank is put into finish-forging die and carries out closed die forging, the temperature control of finish-forging is 1120
DEG C, obtain piston semi-finished product；(6) piston semi-finished product are put into temperature control furnace progress temperature control cooling treatment, when being put into temperature control furnace
Temperature control is 830 DEG C, takes out piston semi-finished product after temperature control is cooling, and temperature control when taking out temperature control furnace is 410 DEG C, then
Piston semi-finished product are finally put into material frame by air-cooled processing, and temperature control is 241 DEG C when piston semi-finished product are put into material frame；(7)
By piston semi-finished product carry out Shot Blasting, removal piston surface of semi-finished oxide skin impurity improve presentation quality, obtain piston at
Product；(8) appearance of piston finished product is checked, and carries out magnetic powder inspection, there are the piston finished products of mass defect for discovery in time；
(9) antirust treatment is carried out to the second best in quality piston finished product, then piston finished product is packed and stored.
Embodiment 2
A kind of band skirt non-hardened and tempered steel piston forging and forming technology, comprising the following steps: (1) non-hardened and tempered steel bar is carried out
It examines, chooses excellent non-hardened and tempered steel bar, non-hardened and tempered steel bar is then cut into fixed length section according to predetermined size, referred to as non-tune
Matter steel section；(2) non-hardened and tempered steel section batch is put into heating furnace and is heated, heating temperature is 1247 DEG C, is then kept the temperature, and is kept the temperature
Temperature is 1232 DEG C, so that non-hardened and tempered steel section center portion temperature is consistent with external stabilization degree；(3) the non-tune for crossing isothermal holding
Progress jumping-up processing on convex recessed swage block is taken out out of heating furnace and be placed on to matter steel section, and the temperature control of jumping-up processing is 1178
℃；(4) by jumping-up, treated that non-hardened and tempered steel section is put into Preform Die carries out closed die forging, and the temperature control of blocking is 1135
DEG C, obtain blocking blank；(5) blocking blank is put into finish-forging die and carries out closed die forging, the temperature control of finish-forging is 1125
DEG C, obtain piston semi-finished product；(6) piston semi-finished product are put into temperature control furnace progress temperature control cooling treatment, when being put into temperature control furnace
Temperature control is 835 DEG C, takes out piston semi-finished product after temperature control is cooling, and temperature control when taking out temperature control furnace is 415 DEG C, then
Piston semi-finished product are finally put into material frame by air-cooled processing, and temperature control is 246 DEG C when piston semi-finished product are put into material frame；(7)
By piston semi-finished product carry out Shot Blasting, removal piston surface of semi-finished oxide skin impurity improve presentation quality, obtain piston at
Product；(8) appearance of piston finished product is checked, and carries out magnetic powder inspection, there are the piston finished products of mass defect for discovery in time；
(9) antirust treatment is carried out to the second best in quality piston finished product, then piston finished product is packed and stored.
Embodiment 3
A kind of band skirt non-hardened and tempered steel piston forging and forming technology, comprising the following steps: (1) non-hardened and tempered steel bar is carried out
It examines, chooses excellent non-hardened and tempered steel bar, non-hardened and tempered steel bar is then cut into fixed length section according to predetermined size, referred to as non-tune
Matter steel section；(2) non-hardened and tempered steel section batch is put into heating furnace and is heated, heating temperature is 1250 DEG C, is then kept the temperature, and is kept the temperature
Temperature is 1235 DEG C, so that non-hardened and tempered steel section center portion temperature is consistent with external stabilization degree；(3) the non-tune for crossing isothermal holding
Progress jumping-up processing on convex recessed swage block is taken out out of heating furnace and be placed on to matter steel section, and the temperature control of jumping-up processing is 1183
℃；(4) by jumping-up, treated that non-hardened and tempered steel section is put into Preform Die carries out closed die forging, and the temperature control of blocking is 1140
DEG C, obtain blocking blank；(5) blocking blank is put into finish-forging die and carries out closed die forging, the temperature control of finish-forging is 1130
DEG C, obtain piston semi-finished product；(6) piston semi-finished product are put into temperature control furnace progress temperature control cooling treatment, when being put into temperature control furnace
Temperature control is 840 DEG C, takes out piston semi-finished product after temperature control is cooling, and temperature control when taking out temperature control furnace is 420 DEG C, then
Piston semi-finished product are finally put into material frame by air-cooled processing, and temperature control is 251 DEG C when piston semi-finished product are put into material frame；(7)
By piston semi-finished product carry out Shot Blasting, removal piston surface of semi-finished oxide skin impurity improve presentation quality, obtain piston at
Product；(8) appearance of piston finished product is checked, and carries out magnetic powder inspection, there are the piston finished products of mass defect for discovery in time；
(9) antirust treatment is carried out to the second best in quality piston finished product, then piston finished product is packed and stored.
Embodiment 4
A kind of band skirt non-hardened and tempered steel piston forging and forming technology, comprising the following steps: (1) non-hardened and tempered steel bar is carried out
It examines, chooses excellent non-hardened and tempered steel bar, non-hardened and tempered steel bar is then cut into fixed length section according to predetermined size, referred to as non-tune
Matter steel section；(2) non-hardened and tempered steel section batch is put into heating furnace and is heated, heating temperature is 1253 DEG C, is then kept the temperature, and is kept the temperature
Temperature is 1238 DEG C, so that non-hardened and tempered steel section center portion temperature is consistent with external stabilization degree；(3) the non-tune for crossing isothermal holding
Progress jumping-up processing on convex recessed swage block is taken out out of heating furnace and be placed on to matter steel section, and the temperature control of jumping-up processing is 1188
℃；(4) by jumping-up, treated that non-hardened and tempered steel section is put into Preform Die carries out closed die forging, and the temperature control of blocking is 1145
DEG C, obtain blocking blank；(5) blocking blank is put into finish-forging die and carries out closed die forging, the temperature control of finish-forging is 1135
DEG C, obtain piston semi-finished product；(6) piston semi-finished product are put into temperature control furnace progress temperature control cooling treatment, when being put into temperature control furnace
Temperature control is 845 DEG C, takes out piston semi-finished product after temperature control is cooling, and temperature control when taking out temperature control furnace is 425 DEG C, then
Piston semi-finished product are finally put into material frame by air-cooled processing, and temperature control is 256 DEG C when piston semi-finished product are put into material frame；(7)
By piston semi-finished product carry out Shot Blasting, removal piston surface of semi-finished oxide skin impurity improve presentation quality, obtain piston at
Product；(8) appearance of piston finished product is checked, and carries out magnetic powder inspection, there are the piston finished products of mass defect for discovery in time；
(9) antirust treatment is carried out to the second best in quality piston finished product, then piston finished product is packed and stored.
Embodiment 5
A kind of band skirt non-hardened and tempered steel piston forging and forming technology, comprising the following steps: (1) non-hardened and tempered steel bar is carried out
It examines, chooses excellent non-hardened and tempered steel bar, non-hardened and tempered steel bar is then cut into fixed length section according to predetermined size, referred to as non-tune
Matter steel section；(2) non-hardened and tempered steel section batch is put into heating furnace and is heated, heating temperature is 1255 DEG C, is then kept the temperature, and is kept the temperature
Temperature is 1240 DEG C, so that non-hardened and tempered steel section center portion temperature is consistent with external stabilization degree；(3) the non-tune for crossing isothermal holding
Progress jumping-up processing on convex recessed swage block is taken out out of heating furnace and be placed on to matter steel section, and the temperature control of jumping-up processing is 1193
℃；(4) by jumping-up, treated that non-hardened and tempered steel section is put into Preform Die carries out closed die forging, and the temperature control of blocking is 1150
DEG C, obtain blocking blank；(5) blocking blank is put into finish-forging die and carries out closed die forging, the temperature control of finish-forging is 1140
DEG C, obtain piston semi-finished product；(6) piston semi-finished product are put into temperature control furnace progress temperature control cooling treatment, when being put into temperature control furnace
Temperature control is 850 DEG C, takes out piston semi-finished product after temperature control is cooling, and temperature control when taking out temperature control furnace is 430 DEG C, then
Piston semi-finished product are finally put into material frame by air-cooled processing, and temperature control is 261 DEG C when piston semi-finished product are put into material frame；(7)
By piston semi-finished product carry out Shot Blasting, removal piston surface of semi-finished oxide skin impurity improve presentation quality, obtain piston at
Product；(8) appearance of piston finished product is checked, and carries out magnetic powder inspection, there are the piston finished products of mass defect for discovery in time；
(9) antirust treatment is carried out to the second best in quality piston finished product, then piston finished product is packed and stored.
The product that the present invention is obtained is by every experimental test and detection:
A, product is tested by tension test, obtains test result:
| Specimen shape | Round steel | Specimen size | 10 |
| Area of Sample (mm2) | 78.54 | Original gauge length (the mm0 of sample | 50.1 |
| Have no progeny gauge length/mm | 58 | Extensometer gage length (mm) | 50 |
| Elongation after fracture/% | 15.77 | The contraction percentage of area (%) | 55.91 |
| Tensile strength/MPa | 958.7 | Have no progeny area (mm2) | 34.63 |
| Surrender strong/MPa | 707.9 |
B, product is detected by metallographic, obtains testing result:
Hardness: 265HBW5/750~278HBW5/750；
Grain size: 6~6.5 grades；
Metallographic structure: ferrite+pearlite；
Particle size distribution is uniform, it is basic in etc. shaft-like, do not find other tissues.
C, the stress-strain diagram of product is as shown in Figure 1.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention.This field it is common
Technical staff is appreciated that without departing from the principle and spirit of the present invention can be a variety of to the progress of these embodiments
Variation, modification, replacement and deformation.The scope of the present invention is defined by the claims and their equivalents.
Claims (6)
1. a kind of band skirt non-hardened and tempered steel piston forging and forming technology, it is characterised in that: the forging and forming technology includes following step
It is rapid:
(1) it tests to non-hardened and tempered steel bar, excellent non-hardened and tempered steel bar is chosen, then according to predetermined size by Micro Alloying
Rod iron material is cut into fixed length section, referred to as non-hardened and tempered steel section；
(2) non-hardened and tempered steel section batch is put into heating furnace and is heated, then kept the temperature so that non-hardened and tempered steel section center portion temperature with
External stabilization degree is consistent；
(3) the non-hardened and tempered steel section that isothermal holding is crossed is taken out out of heating furnace and is placed on convex recessed swage block and carry out from jumping-up
Reason；
(4) by jumping-up, treated that non-hardened and tempered steel section is put into Preform Die carries out closed die forging, obtains blocking blank；
(5) blocking blank is put into finish-forging die and carries out closed die forging, obtain piston semi-finished product；
(6) piston semi-finished product are put into progress temperature control cooling treatment in temperature control furnace, taken out piston semi-finished product after temperature control is cooling, so
Piston semi-finished product are finally put into material frame by air-cooled processing afterwards；
(7) piston semi-finished product are subjected to Shot Blasting, removal piston surface of semi-finished oxide skin impurity improves presentation quality, obtains
Piston finished product；
(8) appearance of piston finished product is checked, and carries out magnetic powder inspection, in time discovery there are the piston of mass defect at
Product；
(9) antirust treatment is carried out to the second best in quality piston finished product, then piston finished product is packed and stored.
2. a kind of band skirt non-hardened and tempered steel piston forging and forming technology according to claim 1, it is characterised in that: the step
Suddenly the heating temperature in (2) is 1245~1255 DEG C, and holding temperature is 1230~1240 DEG C.
3. a kind of band skirt non-hardened and tempered steel piston forging and forming technology according to claim 1, it is characterised in that: the step
Suddenly the temperature control that jumping-up is handled in (3) is 1173~1193 DEG C.
4. a kind of band skirt non-hardened and tempered steel piston forging and forming technology according to claim 1, it is characterised in that: the step
Suddenly the temperature control of blocking is 1130~1150 DEG C in (4).
5. a kind of band skirt non-hardened and tempered steel piston forging and forming technology according to claim 1, it is characterised in that: the step
Suddenly the temperature control of finish-forging is 1120~1140 DEG C in (5).
6. a kind of band skirt non-hardened and tempered steel piston forging and forming technology according to claim 1, it is characterised in that: the step
Temperature control when being put into temperature control furnace in (6) suddenly is 830~850 DEG C, and temperature control when taking out temperature control furnace is 410~430 DEG C,
Temperature control is 241~261 DEG C when piston semi-finished product are put into material frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910225583.0A CN110000319A (en) | 2019-03-25 | 2019-03-25 | A kind of band skirt non-hardened and tempered steel piston forging and forming technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910225583.0A CN110000319A (en) | 2019-03-25 | 2019-03-25 | A kind of band skirt non-hardened and tempered steel piston forging and forming technology |
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| CN110560616A (en) * | 2019-08-29 | 2019-12-13 | 济宁市兖州区鑫旺机械有限公司 | Flat pressing plate forging process |
| CN114749597A (en) * | 2022-04-29 | 2022-07-15 | 力野精密工业（深圳）有限公司 | Precision forging process for novel compressor piston body of automobile |
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| CN114749597A (en) * | 2022-04-29 | 2022-07-15 | 力野精密工业（深圳）有限公司 | Precision forging process for novel compressor piston body of automobile |
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Application publication date: 20190712 |