CN111421089A - Warm forging forming method for throttle valve rod - Google Patents
Warm forging forming method for throttle valve rod Download PDFInfo
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- CN111421089A CN111421089A CN202010245853.7A CN202010245853A CN111421089A CN 111421089 A CN111421089 A CN 111421089A CN 202010245853 A CN202010245853 A CN 202010245853A CN 111421089 A CN111421089 A CN 111421089A
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- throttle valve
- valve rod
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/20—Making machine elements valve parts
- B21K1/205—Making machine elements valve parts rocker arms
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- 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
- C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Forging (AREA)
Abstract
The invention relates to the technical field of warm forging forming, and discloses a warm forging forming method of a throttle valve rod, which comprises the following steps of manufacturing a blank rod, adding 30-50 parts of high-carbon steel into an intermediate frequency electric furnace for melting, adding 2 parts of nickel, 25 parts of stainless steel and 20 parts of iron when the temperature in the intermediate frequency electric furnace rises to 1000-1300 ℃, adding 2-4 parts of ferromanganese and 4-6 parts of nickel-based alloy after deslagging, discharging and adding into a foundry ladle, starting casting, cooling a cast bar blank to 100-200 ℃, heating to 670-780 ℃, preserving heat for 3-5 hours, and cooling to 150 ℃ to obtain the blank rod. According to the warm forging forming method of the throttle valve rod, coarse materials of the throttle valve rod are obtained, flaw detection is carried out, the throttle valve rod manufactured in the step 4 is sampled in batches, a magnetic particle flaw detector is used for carrying out flaw detection, unqualified batches are removed, the throttle valve rod is returned to a furnace for remanufacturing, the qualified batches are sampled and packaged, the throttle valve rod is the required throttle valve rod, the qualified products can flow out after the flaw detection process is carried out before the products leave a factory, and the valve rod with cracks inside.
Description
Technical Field
The invention relates to the technical field of warm forging forming, in particular to a warm forging forming method of a throttle valve rod.
Background
The warm forging is a die forging in which a die is heated to a metal forging temperature, and the plasticity of the metal is sufficiently utilized to reduce the deformation resistance. The forging process can be used for forging by equipment with smaller tonnage, can form workpieces with complex shapes, is mainly used for processing aluminum alloy, titanium alloy and other high-temperature alloy forgings which are difficult to deform and have narrow deformation temperature range during die forging, and is carried out by heating metal to the recovery temperature or the recrystallization temperature.
The traditional warm forging forming method for the throttle valve rod is simple in steps, the quality of the forged throttle valve rod is uneven, and users are very worried about the uneven quality, so that the warm forging forming method for the throttle valve rod is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the warm forging forming method of the throttle valve rod, which has the advantages of better quality of forged products and the like, and solves the problems that the steps of the traditional warm forging forming method of the throttle valve rod are simple, the quality of the forged throttle valve rod is uneven, and a user is very annoying.
(II) technical scheme
In order to realize the purpose of better quality of the forged product, the invention provides the following technical scheme: a warm forging forming method of a throttle valve rod comprises the following steps:
1) manufacturing a billet, adding 30-50 parts of high-carbon steel into an intermediate frequency electric furnace for melting, adding 2 parts of nickel, 25 parts of stainless steel and 20 parts of iron when the temperature in the intermediate frequency electric furnace rises to 1300 ℃ of 1000-;
2) blanking, namely shearing the bar stock into short bars with proper length through a bar stock shearing machine;
3) performing shot blasting, namely performing shot blasting on the short bars in a shot blasting machine to remove an oxide layer and clean the surfaces of the bars;
4) preheating and coating the blank by a peripheral intermediate frequency heating furnace, conveying the heated blank to 2000T equipment for five-station continuous forging, conveying the heated blank to a temperature control cooling furnace for treatment, and discharging the treated blank to obtain a throttle valve rod coarse material;
5) and (4) flaw detection, namely sampling the throttle valve rods prepared in the step (4) in batches, carrying out flaw detection by using a magnetic particle flaw detector, removing unqualified batches, returning to the furnace and remanufacturing, and packaging qualified batches after sampling to obtain the required throttle valve rods.
Preferably, the blank rod is manufactured in the step 1, 30-50 parts of high-carbon steel is added into an intermediate frequency electric furnace to be melted, when the temperature in the intermediate frequency electric furnace rises to 1000-1300 ℃, 2 parts of nickel, 25 parts of stainless steel and 20 parts of iron are added, 2-4 parts of ferromanganese and 4-6 parts of nickel-based alloy are added after slag is removed, the material is discharged and put into a foundry ladle to start casting, the blank of the cast and molded bar is cooled to 100-200 ℃, then heated to 670-780 ℃, insulated for 3-5 hours, cooled to 150 ℃ to obtain the blank rod, and the blank rod is cooled to 150 ℃ to 30 ℃ per hour.
Preferably, the blank in the step 4 is preheated and coated by a peripheral intermediate frequency heating furnace, the heated blank is conveyed to 2000T equipment for five-station continuous forging, then the blank is conveyed to a temperature control cooling furnace for treatment and then discharged from the furnace to obtain a throttle valve rod rough material, and the blank is gradually deformed in a die through a processing step.
Preferably, in the step 2, blanking, the bar stock is cut into short bars with proper length by a bar stock shearing machine, and after the bar stock is cut into the short bars, the two ends of the short bars are polished to be flat, so as to remove burrs.
Preferably, the throttle valve rods in the step 5 are sampled in batches, a magnetic particle flaw detector is used for flaw detection, unqualified batches are removed, the throttle valve rods are returned to the furnace for remanufacturing, qualified batches are sampled, and the batch sampling method is that each hundred throttle valve rods are divided into one batch, and five samples are sampled in each batch.
(III) advantageous effects
Compared with the prior art, the invention provides a warm forging forming method of a throttle valve rod, which has the following beneficial effects:
1. the warm forging forming method of the throttle valve rod comprises the steps of blanking, cutting a bar into short rods with proper length through a bar shearing machine, carrying out shot blasting on the short rods through a shot blasting machine, removing an oxide layer, cleaning the surface of the bar, preheating and coating the blank through a peripheral intermediate frequency heating furnace, heating, then conveying the blank to 2000T equipment for five-station continuous forging, then conveying the blank to a temperature-controlled cooling furnace for treatment, discharging the blank out of the furnace to obtain coarse materials of the throttle valve rod, carrying out flaw detection, carrying out batch sampling on the throttle valve rod prepared in the step 4, carrying out flaw detection by using a magnetic particle flaw detector, removing unqualified batch re-melting and remanufacturing, and packaging qualified batches after sampling to obtain the required throttle valve rod.
2. The warm forging forming method of the throttle valve rod comprises the steps of manufacturing a blank rod, adding 30-50 parts of high-carbon steel into an intermediate frequency electric furnace for melting, adding 2 parts of nickel, 25 parts of stainless steel and 20 parts of iron when the temperature in the intermediate frequency electric furnace rises to 1000-1300 ℃, adding 2-4 parts of ferromanganese and 4-6 parts of nickel-based alloy after deslagging, discharging, adding into a ladle, starting pouring, cooling a cast bar blank to 100-200 ℃, heating to 670-780 ℃, preserving heat for 3-5 hours, cooling to 150 ℃ to obtain the blank rod, and obtaining the blank rod which is high in strength and suitable for a warm forging process.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: a warm forging forming method of a throttle valve rod comprises the following steps:
1) manufacturing a billet, adding 30 parts of high-carbon steel into an intermediate frequency electric furnace for melting, adding 2 parts of nickel, 25 parts of stainless steel and 20 parts of iron when the temperature in the intermediate frequency electric furnace rises to 1000 ℃, adding 2 parts of ferromanganese and 4 parts of nickel-based alloy after deslagging, discharging, adding into a ladle, starting casting, cooling a cast bar blank to 100 ℃, heating to 670 ℃, preserving heat for 3-5 hours, and cooling to 150 ℃ to obtain the billet;
2) blanking, namely shearing the bar stock into short bars with proper length through a bar stock shearing machine;
3) performing shot blasting, namely performing shot blasting on the short bars in a shot blasting machine to remove an oxide layer and clean the surfaces of the bars;
4) preheating and coating the blank by a peripheral intermediate frequency heating furnace, conveying the heated blank to 2000T equipment for five-station continuous forging, conveying the heated blank to a temperature control cooling furnace for treatment, and discharging the treated blank to obtain a throttle valve rod coarse material;
5) and (4) flaw detection, namely sampling the throttle valve rods prepared in the step (4) in batches, carrying out flaw detection by using a magnetic particle flaw detector, removing unqualified batches, returning to the furnace and remanufacturing, and packaging qualified batches after sampling to obtain the required throttle valve rods.
The method comprises the following steps of 1, manufacturing a billet, adding 30 parts of high-carbon steel into a medium-frequency electric furnace for melting, adding 2 parts of nickel, 25 parts of stainless steel and 20 parts of iron when the temperature in the medium-frequency electric furnace rises to 1000 ℃, adding 2 parts of ferromanganese and 4 parts of nickel-based alloy after deslagging, discharging, adding the mixture into a ladle, starting pouring, cooling a cast bar blank to 100 ℃, heating to 670 ℃, preserving heat for 3-5 hours, cooling to 150 ℃ to obtain the billet, and cooling to 150 ℃ at 30 ℃ per hour.
And 4, preheating and coating the blank by a peripheral intermediate frequency heating furnace, conveying the heated blank to 2000T equipment for five-station continuous forging, conveying the heated blank to a temperature-controlled cooling furnace for treatment, and discharging to obtain a throttle valve rod coarse material, wherein the blank is gradually deformed in a die through a processing step.
And 2, blanking, namely shearing the bar stock into a short bar with proper length through a bar stock shearing machine, and polishing and flattening the two ends of the short bar after the bar stock is sheared into the short bar to remove burrs.
And 5, sampling the throttle valve rods in batches, detecting the defects by using a magnetic particle flaw detector, removing unqualified batches, returning to the furnace, remanufacturing, and sampling qualified batches to package, wherein the specific method for sampling in batches is to divide each hundred throttle valve rods into one batch and five samples in each batch.
And (4) performing shot blasting on the short bars by using a shot blasting machine, removing an oxide layer, cleaning the surfaces of the bars, and facilitating the adsorption of subsequent coatings.
Example two: a warm forging forming method of a throttle valve rod comprises the following steps:
1) manufacturing a billet, adding 40 parts of high-carbon steel into an intermediate frequency electric furnace for melting, adding 2 parts of nickel, 25 parts of stainless steel and 20 parts of iron when the temperature in the intermediate frequency electric furnace rises to 1150 ℃, adding 3 parts of ferromanganese and 5 parts of nickel-based alloy after deslagging, discharging, adding into a ladle, starting casting, cooling a cast bar blank to 150 ℃, heating to 730 ℃, preserving heat for 3-5 hours, and cooling to 150 ℃ to obtain the billet;
2) blanking, namely shearing the bar stock into short bars with proper length through a bar stock shearing machine;
3) performing shot blasting, namely performing shot blasting on the short bars in a shot blasting machine to remove an oxide layer and clean the surfaces of the bars;
4) preheating and coating the blank by a peripheral intermediate frequency heating furnace, conveying the heated blank to 2000T equipment for five-station continuous forging, conveying the heated blank to a temperature control cooling furnace for treatment, and discharging the treated blank to obtain a throttle valve rod coarse material;
5) and (4) flaw detection, namely sampling the throttle valve rods prepared in the step (4) in batches, carrying out flaw detection by using a magnetic particle flaw detector, removing unqualified batches, returning to the furnace and remanufacturing, and packaging qualified batches after sampling to obtain the required throttle valve rods.
The method comprises the following steps of 1, manufacturing a billet, adding 40 parts of high-carbon steel into a medium-frequency electric furnace for melting, adding 2 parts of nickel, 25 parts of stainless steel and 20 parts of iron when the temperature in the medium-frequency electric furnace rises to 1150 ℃, adding 3 parts of ferromanganese and 5 parts of nickel-based alloy after deslagging, discharging, adding the materials into a ladle, starting pouring, cooling a cast bar blank to 150 ℃, heating to 730 ℃, preserving heat for 3-5 hours, cooling to 150 ℃ to obtain the billet, and cooling to 150 ℃ at 30 ℃ per hour.
And 4, preheating and coating the blank by a peripheral intermediate frequency heating furnace, conveying the heated blank to 2000T equipment for five-station continuous forging, conveying the heated blank to a temperature-controlled cooling furnace for treatment, and discharging to obtain a throttle valve rod coarse material, wherein the blank is gradually deformed in a die through a processing step.
And 2, blanking, namely shearing the bar stock into a short bar with proper length through a bar stock shearing machine, and polishing and flattening the two ends of the short bar after the bar stock is sheared into the short bar to remove burrs.
And 5, sampling the throttle valve rods in batches, detecting the defects by using a magnetic particle flaw detector, removing unqualified batches, returning to the furnace, remanufacturing, and sampling qualified batches to package, wherein the specific method for sampling in batches is to divide each hundred throttle valve rods into one batch and five samples in each batch.
The method comprises the steps of preheating and coating a blank by a peripheral intermediate frequency heating furnace, conveying the heated blank to 2000T equipment for five-station continuous forging, conveying the heated blank to a temperature control cooling furnace for treatment, discharging the heated blank to obtain a throttle valve rod coarse material, wherein the heating purpose is to improve the plasticity of the material and reduce the deformation resistance, so that the purposes of prolonging the service life of a die and reducing the tonnage of the equipment can be achieved, and the advantage of warm forging is also achieved
Example three: a warm forging forming method of a throttle valve rod comprises the following steps:
1) manufacturing a billet, adding 50 parts of high-carbon steel into an intermediate frequency electric furnace for melting, adding 2 parts of nickel, 25 parts of stainless steel and 20 parts of iron when the temperature in the intermediate frequency electric furnace rises to 1300 ℃, adding 4 parts of ferromanganese and 6 parts of nickel-based alloy after deslagging, discharging, adding into a ladle, starting casting, cooling a cast bar blank to 200 ℃, heating to 780 ℃, preserving heat for 3-5 hours, and cooling to 150 ℃ to obtain the billet;
2) blanking, namely shearing the bar stock into short bars with proper length through a bar stock shearing machine;
3) performing shot blasting, namely performing shot blasting on the short bars in a shot blasting machine to remove an oxide layer and clean the surfaces of the bars;
4) preheating and coating the blank by a peripheral intermediate frequency heating furnace, conveying the heated blank to 2000T equipment for five-station continuous forging, conveying the heated blank to a temperature control cooling furnace for treatment, and discharging the treated blank to obtain a throttle valve rod coarse material;
5) and (4) flaw detection, namely sampling the throttle valve rods prepared in the step (4) in batches, carrying out flaw detection by using a magnetic particle flaw detector, removing unqualified batches, returning to the furnace and remanufacturing, and packaging qualified batches after sampling to obtain the required throttle valve rods.
The method comprises the following steps of 1, manufacturing a billet, adding 50 parts of high-carbon steel into a medium-frequency electric furnace for melting, adding 2 parts of nickel, 25 parts of stainless steel and 20 parts of iron when the temperature in the medium-frequency electric furnace rises to 1300 ℃, adding 4 parts of ferromanganese and 6 parts of nickel-based alloy after deslagging, discharging, adding the mixture into a ladle, starting pouring, cooling a cast bar blank to 200 ℃, heating to 780 ℃, preserving heat for 3-5 hours, cooling to 150 ℃ to obtain the billet, and cooling to 150 ℃ at 30 ℃ per hour.
And 4, preheating and coating the blank by a peripheral intermediate frequency heating furnace, conveying the heated blank to 2000T equipment for five-station continuous forging, conveying the heated blank to a temperature-controlled cooling furnace for treatment, and discharging to obtain a throttle valve rod coarse material, wherein the blank is gradually deformed in a die through a processing step.
And 2, blanking, namely shearing the bar stock into a short bar with proper length through a bar stock shearing machine, and polishing and flattening the two ends of the short bar after the bar stock is sheared into the short bar to remove burrs.
And 5, sampling the throttle valve rods in batches, detecting the defects by using a magnetic particle flaw detector, removing unqualified batches, returning to the furnace, remanufacturing, and sampling qualified batches to package, wherein the specific method for sampling in batches is to divide each hundred throttle valve rods into one batch and five samples in each batch.
The invention has the beneficial effects that: the warm forging forming method of the throttle valve rod comprises the steps of blanking, cutting a bar into short rods with proper length through a bar shearing machine, carrying out shot blasting on the short rods, removing an oxide layer, cleaning the surface of the bar, preheating and coating the blank through a peripheral intermediate frequency heating furnace, heating, then conveying the blank to 2000T equipment for five-station continuous forging, then conveying the blank to a temperature-controlled cooling furnace for treatment, discharging to obtain coarse throttle valve rods, carrying out flaw detection, sampling the throttle valve rods prepared in the step 4 in batches, carrying out flaw detection by using a magnetic particle flaw detector, removing unqualified batches for re-manufacturing, packaging in batches qualified by sampling to obtain the required throttle valve rods, enabling qualified products to flow out after the flaw detection process is carried out before the products leave a factory, manufacturing the valve rods with cracks inside, adding 30-50 parts of high-carbon steel into the intermediate frequency electric furnace for melting through manufacturing of billet rods, and when the temperature in the electric furnace rises to 1300 ℃, and then 2 parts of nickel, 25 parts of stainless steel and 20 parts of iron are added, 2-4 parts of ferromanganese and 4-6 parts of nickel-based alloy are added after slag discharge, the materials are discharged and put into a foundry ladle, casting is started, the blank of the cast and molded bar is cooled to 200 ℃, then heated to 670 and 780 ℃, insulated for 3-5 hours and cooled to 150 ℃ to obtain a blank rod, and the manufactured blank rod has higher strength and is suitable for a warm forging process, so that the problems that the traditional warm forging molding method of the throttle valve rod has simple steps, the quality of the forged throttle valve rod is uneven and the user is very annoying are solved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The warm forging forming method of the throttle valve rod is characterized by comprising the following steps of:
1) manufacturing a billet, adding 30-50 parts of high-carbon steel into an intermediate frequency electric furnace for melting, adding 2 parts of nickel, 25 parts of stainless steel and 20 parts of iron when the temperature in the intermediate frequency electric furnace rises to 1300 ℃ of 1000-;
2) blanking, namely shearing the bar stock into short bars with proper length through a bar stock shearing machine;
3) performing shot blasting, namely performing shot blasting on the short bars in a shot blasting machine to remove an oxide layer and clean the surfaces of the bars;
4) preheating and coating the blank by a peripheral intermediate frequency heating furnace, conveying the heated blank to 2000T equipment for five-station continuous forging, conveying the heated blank to a temperature control cooling furnace for treatment, and discharging the treated blank to obtain a throttle valve rod coarse material;
5) and (4) flaw detection, namely sampling the throttle valve rods prepared in the step (4) in batches, carrying out flaw detection by using a magnetic particle flaw detector, removing unqualified batches, returning to the furnace and remanufacturing, and packaging qualified batches after sampling to obtain the required throttle valve rods.
2. The warm forging forming method for the throttle valve rod as claimed in claim 1, wherein the step 1 is to manufacture a blank rod, 30-50 parts of high-carbon steel is added into an intermediate frequency electric furnace to be melted, when the temperature in the intermediate frequency electric furnace rises to 1300 ℃ of 1000-.
3. The warm forging forming method for the throttle valve rod according to claim 1, wherein the blank in the step 4 is preheated and coated by a peripheral intermediate frequency heating furnace, the blank is conveyed to a 2000T device for five-station continuous forging after being heated, and then the blank is conveyed to a temperature-controlled cooling furnace for treatment and then discharged from the furnace to obtain a throttle valve rod rough material, and the blank is gradually deformed in a die through a plurality of processing steps.
4. The warm forging forming method for the throttle valve rod according to claim 1, wherein in the step 2, blanking is performed, a bar stock is cut into short bars with proper length by a bar stock shearing machine, and after the bar stock is cut into the short bars, two ends of each short bar are ground and flattened to remove burrs.
5. The warm forging forming method of the throttle valve rod according to claim 1, wherein the throttle valve rod in step 5 is sampled in batches, flaw detection is performed by using a magnetic particle flaw detector, unqualified batches are removed, remanufactured in a furnace, and qualified batches are sampled, and the batch sampling method is that each hundred throttle valve rods are divided into one batch, and five batches are sampled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245853.7A CN111421089A (en) | 2020-03-31 | 2020-03-31 | Warm forging forming method for throttle valve rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245853.7A CN111421089A (en) | 2020-03-31 | 2020-03-31 | Warm forging forming method for throttle valve rod |
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| CN111421089A true CN111421089A (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010245853.7A Pending CN111421089A (en) | 2020-03-31 | 2020-03-31 | Warm forging forming method for throttle valve rod |
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|---|---|---|---|---|
| JPS6092034A (en) * | 1983-10-24 | 1985-05-23 | Toyota Motor Corp | Cold-warm forging of slug of engine valve |
| KR20070001864A (en) * | 2006-12-14 | 2007-01-04 | 주식회사 케이,에스,피 | Manufacturing method of valve spindle for internal combustion engine |
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| CN103071753A (en) * | 2012-08-22 | 2013-05-01 | 昌利锻造有限公司 | Forging method of ball valve stem |
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2020
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|---|---|---|---|---|
| JPS6092034A (en) * | 1983-10-24 | 1985-05-23 | Toyota Motor Corp | Cold-warm forging of slug of engine valve |
| KR20070001864A (en) * | 2006-12-14 | 2007-01-04 | 주식회사 케이,에스,피 | Manufacturing method of valve spindle for internal combustion engine |
| US20150300506A1 (en) * | 2012-06-14 | 2015-10-22 | Nittan Valve Co., Ltd. | Poppet valve with a formed seat, and method of making |
| CN103071753A (en) * | 2012-08-22 | 2013-05-01 | 昌利锻造有限公司 | Forging method of ball valve stem |
| CN102979956A (en) * | 2012-11-13 | 2013-03-20 | 安徽春辉仪表线缆集团有限公司 | Warm forging forming method of throttle valve stem |
| CN103060665A (en) * | 2012-11-13 | 2013-04-24 | 安徽春辉仪表线缆集团有限公司 | Method for casting valve rod for manufacturing plug valve |
| CN106925716A (en) * | 2015-12-30 | 2017-07-07 | 慈溪市华盛低压电器厂 | A kind of manufacture method of valve body |
| CN110318004A (en) * | 2019-07-03 | 2019-10-11 | 衡阳市金则利特种合金股份有限公司 | The production technology of solenoid valve alloy material and static iron core |
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| Title |
|---|
| JANNYXIAOXIA: ""2000T设备情况说明"", 《百度文库》 * |
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Application publication date: 20200717 |