CN102672432A - Production process for steel tubes special for shell of vortex type air-conditioning compressor - Google Patents
Production process for steel tubes special for shell of vortex type air-conditioning compressor Download PDFInfo
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- CN102672432A CN102672432A CN2012101561112A CN201210156111A CN102672432A CN 102672432 A CN102672432 A CN 102672432A CN 2012101561112 A CN2012101561112 A CN 2012101561112A CN 201210156111 A CN201210156111 A CN 201210156111A CN 102672432 A CN102672432 A CN 102672432A
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Abstract
The invention relates to a production process for steel tubes and particularly relates to a production process for steel tubes special for a shell of a vortex type air-conditioning compressor. According to the technical scheme provided by the invention, the production process for the steel tubes special for the shell of the vortex type air-conditioning compressor comprises several steps, i.e. selecting a steel coil and cutting the steel coil into steel strips, feeding and carrying out tube rolling molding, forming the steel tubes through high-frequency welding and extrusion, carrying out welding post-treatment, carrying out cooling treatment on weld seams, detecting the weld seams, carrying out accuracy correction, and carrying out hydraulic test. The production process has the advantages that the structure is simple, compact and reasonable, the production efficiency is effectively increased, the cost is reduced, the raw material and equipment investment is saved, and the operating process is simple and convenient.
Description
Technical field
The present invention relates to a kind of production technology of steel pipe, specifically the air conditioner compressed engine housing production process of special steel pipe of vortex.
Background technology
Central air-conditioning (4 ~ 10) compressor is a vortex, and its housing is high to quality requirement, and the housing specification is big, housing roundness requirement≤0.25mm, and inner walls welding slag burr requires tolerance to be+0.00/-0.15 after removing, and housing must bear high pressure simultaneously.At present, produce vortex compressor of air conditioner steel pipe shell both at home and abroad, all adopt U.S.'s plasma arc welding (PAW) connection technology to make production, guarantee that the vortex air-conditioner compressor outer housing reaches desired precision index and pressure-bearing index.
The weak point of this production technology is that feed consumption is big, complicated operation, and yield rate is low, and equipment investment is huge.Since be that single-piece is made, inefficiency, and the amount of labour used is big, has caused production cost very high.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point; Thereby provide a kind of vortex air conditioner compressed engine housing production process of special steel pipe; This production technology can effectively be enhanced productivity under the prerequisite of guaranteeing product precision index and pressure-bearing index, has reduced cost; Save raw material and equipment investment, operating procedure is easy.
According to technical scheme provided by the invention, the air conditioner compressed engine housing production process of special steel pipe of vortex comprises the steps:
1, the air conditioner compressed engine housing production process of special steel pipe of vortex is characterized in that comprising the steps:
(1), select coil of strip for use and be cut into steel band: the raw material selection coil of strip is cut into steel band, and said coil of strip material is SPHC, percentage elongation >=31%, tensile strength >=270mpa; Or SS400, percentage elongation >=21%, tensile strength >=400 ~ 510mpa;
(2), material loading and tube rolling moulding: the steel band that shears is steadily sent in the three roller ∕ four-roller type extrusion modling units, kept the steel band center consistent, do not make the distortion of band steel, to guarantee the weld seam welding steadily, closely with the shaping machine set center; Angular aperture before the extruding is controlled between 3o ~ 4o motor power (output): 315KW, profiled section and sizing section respectively join a motor;
(3), high-frequency welding is squeezed into steel pipe: adopt solid-state high-frequency welding equipment that volume is rolled good blank socket and weld, voltage is 250 ~ 320V during welding, and electric current is 350 ~ 550A, and mill speed is 20 ~ 35 meters/minute;
(4), weld seam post processing: adopt the circular arc cutter to strike off the outside welding slag in commissure, and strike off the inwall welding slag with the inside weld remover; Simultaneously, when weld seam is in 850 ° ~ 950 ° high-temperature regions, outside weld is carried out roll extrusion, to impel the soldered structure closely and make the soldered smooth surface;
(5), the cooling processing of weld seam: butt welded seam carries out air and cools off naturally, weld seam temperature is reduced to get into but zone cooling of water-cooled below 400 ° then, guarantees the mechanical performance of welded seam area;
(6), weld seam detection: cooled steel pipe gets into eddy current flaw detec, and butt welded seam carries out random groups eddy current inspection test, confirms that through detecting weld seam is intact; Simultaneously pipe cutting carries out the internal bore welding seam>the flattening test of 180o, confirm that through detecting crackle can not be arranged;
(7), accuracy correction: adopt the correction unit to detect the qualified steel pipe of weld seam welding and carry out accuracy correction, guarantee its roundness≤+/-0.25;
(8), hydraulic pressure test: the steel pipe to through weld seam detection and accuracy correction carries out hydraulic pressure test, guarantees that steel pipe bears the high pressure of 18mpa, duration >=1 minute, product reaches qualified index; The steel pipe of pass the test is packaging and warehousing after tack, chamfering and antirust processing.
As further improvement of the present invention, said correction unit comprises that four groups are slightly proofreaied and correct unit and three groups of fine correction units.
As further improvement of the present invention, the infrared ray arrangement for perspective is set up in post processing place of said weld seam, the removing situation of strict control inside weld welding slag.
Compared with present technology the present invention has the following advantages:
The present invention is simple, compact and reasonable for structure; Effectively improved production efficiency, reduced cost, saved raw material and equipment investment, operating procedure is easy.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Following the present invention will combine embodiment to further describe:
Embodiment one: product specification: external diameter Φ 166.7mm, wall thickness 4.0mm (Shanghai Hitachi air-conditioning)
(1), select for use coil of strip to be cut into steel band: raw material selection material SS400, percentage elongation >=21%, tensile strength 400-510mpa; Baosteel heat production roll bending can guarantee thickness of slab tolerance and interior material amount, utilizes band steel cutter that hot rolling plate itemize is cut into steel band; The blade of said band steel cutter need guarantee that cutting edge is sharp, and every shearing once need be carried out the cutting edge mill and repair; Thereby make that the side cut mouth is neat, eliminate burr, crimping and the broken limit of dividing band steel both sides, the feasible steel both sides of being with are smooth; Said conventional width of steel band is according to formula: (Φ-0.5S) calculates and obtains that (said formula is at periodical steel pipe by name B=π; Publication date is on March 29th, 2000, and ISSN number is 1001-2311, and title is open in the document of " ERW required strip width computing formula inquire into ".), wherein, B is a steel band, and Φ is the product external diameter, and S is a thickness of strips; Should be amplified to 520.91mm according to above computing formula width of steel band by the actual width of steel band of 517.41mm,
(2), material loading and tube rolling moulding: the steel band that shears is steadily sent in eight groups of three-roller type extrusion modling units, kept the steel band center consistent, do not make the distortion of band steel, to guarantee the weld seam welding steadily, closely with the shaping machine set center; The angular aperture that precisive shaped rolls between district and the compression roller keeps 3.0o ~ 3.5o, and center line is downward-sloping when rolling; Motor power (output) suitably amplifies, and by 185 ~ 200KW that general designing unit confirms, motor is amplified to 315KW, and profiled section and sizing section are respectively joined one.When making tube rolling, the unit transmission is smooth.
(3), high-frequency welding is squeezed into steel pipe: adopt solid-state high-frequency welding equipment that volume is rolled good blank socket and weld, voltage is 250 ~ 270V during welding, and electric current is 350 ~ 400A, and mill speed is 25 meters/minute.Adopt solid-state high-frequency welding equipment replacement electron tube high-frequency welding equipment in the past among the present invention, solid-state high-frequency welding equipment can be controlled automatically, makes current stabilization; Eliminate voltage pulsation, welding temperature is steady thereupon, makes strip edge edge temperature even; Guaranteed the quality of soldered; According to the size of thickness of slab and specification, electric current and voltage is controlled adjustment, and mill speed is conveniently adjusted simultaneously.
(4), weld seam post processing: adopt the circular arc cutter to strike off the outside welding slag in commissure, and strike off the inwall welding slag with the inside weld remover.Simultaneously, when weld seam is in 850 ° ~ 950 ° high-temperature regions, outside weld is carried out roll extrusion, to impel the soldered structure closely and make the soldered smooth surface.
(5), the cooling processing of weld seam: through 50 meters air nature cooling sections, butt welded seam carries out air and cools off naturally, weld seam temperature is reduced to get into the but zone cooling of 5 meters water-cooleds below 400 ° then, guarantees the mechanical performance of welded seam area.
(6), weld seam detection: cooled steel pipe gets into eddy current flaw detec, and butt welded seam carries out random groups eddy current inspection test, confirms that through detecting weld seam is intact; Simultaneously pipe cutting carries out the internal bore welding seam>the flattening test of 180o, confirm that through detecting crackle can not be arranged; Simultaneously internal bore welding slag sampling (burr) is measured, is guaranteed precision in+0.00/-0.15, when interior burr is scraped after, weld seam must not have tangible wave phenomenon, steel pipe meets each item quality testing requirement.
(7), accuracy correction: detect the qualified steel pipe of weld seam welding and carry out accuracy correction, said correction unit slightly proofreaies and correct unit by four groups and three groups of fine correction units are formed, and the roundness after steel pipe is calibrated≤+/-0.15 meets the requirements.
(8), hydraulic pressure test: the steel pipe to through weld seam detection and accuracy correction carries out hydraulic pressure test, guarantees that steel pipe bears the high pressure of 18mpa, and duration >=1 minute guarantees that weld seam can bear 178 kilograms high pressure, and product reaches qualified index; The steel pipe of pass the test is packaging and warehousing after tack, chamfering and immersion oil are handled.
Embodiment two: product specification: external diameter Φ 168.00 thicknesss of slab: 6.0mm (Dalian Sanyo air-conditioning)
(1), select for use coil of strip to be cut into steel band: raw material selection material SPHC, percentage elongation >=31%, tensile strength >=270mpa; Baosteel heat production roll bending can guarantee thickness of slab tolerance and interior material amount, utilizes band steel cutter that hot rolling plate itemize is cut into steel band; The blade of said band steel cutter need guarantee that cutting edge is sharp, and every shearing once need be carried out the cutting edge mill and repair; Thereby make that the side cut mouth is neat, eliminate burr, crimping and the broken limit of dividing band steel both sides, the feasible steel both sides of being with are smooth; Said conventional width of steel band is according to formula: (Φ-0.5S) calculates and obtains that (said formula is at periodical steel pipe by name B=π; Publication date is on March 29th, 2000, and ISSN number is 1001-2311, and title is open in the document of " ERW required strip width computing formula inquire into ".), wherein, B is a steel band, and Φ is the product external diameter, and S is a thickness of strips; The actual width of steel band that shears is amplified to 521.35mm by 518.35mm.
(2), material loading and tube rolling moulding: the steel band that shears is steadily sent in eight groups of three-roller type extrusion modling units, and maintenance steel band center is consistent with the shaping machine set center, does not make the distortion of band steel, and is closely to guarantee weld seam; The angular aperture that precisive shaped rolls between district and the compression roller keeps 3.0o ~ 4.0o, and center line is downward-sloping when rolling; Motor power (output) suitably amplifies, and by 185 ~ 200KW that general designing unit confirms, motor is amplified to 315KW, and profiled section and sizing section are respectively joined one.
(3), high-frequency welding is squeezed into steel pipe: adopt solid-state high-frequency welding equipment that volume is rolled good blank socket and weld, voltage is 290 ~ 310V during welding, and electric current is 500 ~ 550A, and mill speed is 20 meters/minute.Adopt solid-state high-frequency welding equipment replacement electron tube high-frequency welding equipment in the past among the present invention, solid-state high-frequency welding equipment can be controlled automatically, makes current stabilization; Eliminate voltage pulsation, welding temperature is steady thereupon, makes strip edge edge temperature even; Guaranteed the quality of soldered; According to the size of thickness of slab and specification, electric current and voltage is controlled adjustment, and mill speed is conveniently adjusted simultaneously.
(4), weld seam post processing: adopt the circular arc cutter to strike off the outside welding slag in commissure, and strike off the inwall welding slag with the inside weld remover.Simultaneously, when weld seam is in 850 ° ~ 950 ° high-temperature regions, outside weld is carried out roll extrusion, to impel the soldered structure closely and make the soldered smooth surface.
(5), the cooling processing of weld seam: through 50 meters air nature cooling sections, butt welded seam carries out air and cools off naturally, weld seam temperature is reduced to get into the but zone cooling of 5 meters water-cooleds below 400 ° then, guarantees the mechanical performance of welded seam area.
(6), weld seam detection: cooled steel pipe gets into eddy current flaw detec, and butt welded seam carries out random groups eddy current inspection test, confirms that through detecting weld seam is intact; Simultaneously pipe cutting carries out the internal bore welding seam>the flattening test of 180o, confirm that through detecting crackle can not be arranged; Simultaneously internal bore welding slag sampling (burr) is measured, is guaranteed precision in+0.00/-0.15, when interior burr is scraped after, weld seam must not have tangible wave phenomenon, steel pipe meets each item quality testing requirement.
(7), accuracy correction: detect the qualified steel pipe of weld seam welding and carry out accuracy correction, said correction unit slightly proofreaies and correct unit by four groups and three groups of fine correction units are formed, the roundness after steel pipe is calibrated≤+/-0.25MM, meet the requirements.
(8), hydraulic pressure test: the steel pipe to through weld seam detection and accuracy correction carries out hydraulic pressure test, guarantees that steel pipe bears the high pressure of 18mpa, and duration >=1 minute guarantees that weld seam can bear 178 kilograms high pressure, and product reaches qualified index; The steel pipe of pass the test is packaging and warehousing after tack, chamfering and antirust immersion oil are handled.
Embodiment three: product specification: external diameter Φ 231mm thickness of slab: 3.2mm (U.S. Ai Mosheng)
(1), select for use coil of strip to be cut into steel band: raw material selection material SPHC, percentage elongation >=31%, tensile strength >=270mpa; Baosteel heat production roll bending can guarantee thickness of slab tolerance and interior material amount, utilizes band steel cutter that hot rolling plate itemize is cut into steel band; The blade of said band steel cutter need guarantee that cutting edge is sharp, and every shearing once need be carried out the cutting edge mill and repair; Thereby make that the side cut mouth is neat, eliminate burr, crimping and the broken limit of dividing band steel both sides, the feasible steel both sides of being with are smooth; Said conventional width of steel band is according to formula: (Φ-0.5S) calculates and obtains that (said formula is at periodical steel pipe by name B=π; Publication date is on March 29th, 2000, and ISSN number is 1001-2311, and title is open in the document of " ERW required strip width computing formula inquire into ".), wherein, B is a steel band, and Φ is the product external diameter, and S is a thickness of strips; The actual width of steel band that shears is amplified to 723.66mm by 720.66mm.
(2), material loading and tube rolling moulding: the steel band that shears is steadily sent in eight groups of three-roller type extrusion modling units, and maintenance steel band center is consistent with the shaping machine set center, does not make the distortion of band steel, and is closely to guarantee weld seam; The angular aperture that precisive shaped rolls between district and the compression roller keeps 3.5o ~ 4.5o, and center line is downward-sloping when rolling; Motor power (output) suitably amplifies, and by 185 ~ 200KW that general designing unit confirms, motor is amplified to 315KW, and profiled section and sizing section are respectively joined one.
(3), high-frequency welding is squeezed into steel pipe: adopt solid-state high-frequency welding equipment that volume is rolled good blank socket and weld, voltage is 280 ~ 300V during welding, and electric current is 350 ~ 380A, and mill speed is 20 meters/minute.Adopt solid-state high-frequency welding equipment replacement electron tube high-frequency welding equipment in the past among the present invention, solid-state high-frequency welding equipment can be controlled automatically, makes current stabilization; Eliminate voltage pulsation, welding temperature is steady thereupon, makes strip edge edge temperature even; Guaranteed the quality of soldered; According to the size of thickness of slab and specification, electric current and voltage is controlled adjustment, and mill speed is conveniently adjusted simultaneously.
(4), weld seam post processing: adopt the circular arc cutter to strike off the outside welding slag in commissure, and strike off the inwall welding slag with the inside weld remover.Simultaneously, when weld seam is in 850 ° ~ 950 ° high-temperature regions, outside weld is carried out roll extrusion, to impel the soldered structure closely and make the soldered smooth surface.
(5), the cooling processing of weld seam: through 50 meters air nature cooling sections, butt welded seam carries out air and cools off naturally, weld seam temperature is reduced to get into the but zone cooling of 5 meters water-cooleds below 400 ° then, guarantees the mechanical performance of welded seam area.
(6), weld seam detection: cooled steel pipe gets into eddy current flaw detec, and butt welded seam carries out random groups eddy current inspection test, confirms that through detecting weld seam is intact; Simultaneously pipe cutting carries out the internal bore welding seam>the flattening test of 180o, confirm that through detecting crackle can not be arranged; Simultaneously internal bore welding slag sampling (burr) is measured, is guaranteed precision in+0.00/-0.15, when interior burr is scraped after, weld seam must not have tangible wave phenomenon, steel pipe meets each item quality testing requirement.
(7), accuracy correction: detect the qualified steel pipe of weld seam welding and carry out accuracy correction, said correction unit slightly proofreaies and correct unit by four groups and three groups of fine correction units are formed, the roundness after steel pipe is calibrated≤+/-0.25MM, meet the requirements.
(8), hydraulic pressure test: the steel pipe to through weld seam detection and accuracy correction carries out hydraulic pressure test, guarantees that steel pipe bears the high pressure of 18mpa, and duration >=1 minute guarantees that weld seam can bear 178 kilograms high pressure, and product reaches qualified index; The steel pipe of pass the test is packaging and warehousing after tack, chamfering and antirust immersion oil are handled.Antirust oil specifications and models: HR1050B steel pipe antirust oil, manufacturer: the precious lubricating oil in China Resources, Wuxi Co., Ltd.
Claims (4)
1. the air conditioner compressed engine housing production process of special steel pipe of vortex is characterized in that comprising the steps:
(1), select coil of strip for use and be cut into steel band: the raw material selection coil of strip is cut into steel band, and said coil of strip material is SSPHC, percentage elongation >=31%, tensile strength >=270mpa; Or the coil of strip material is SS400, percentage elongation >=21%, tensile strength >=400 ~ 510mpa;
(2), material loading and tube rolling moulding: the steel band that shears is steadily sent in the three roller ∕ four-roller type extrusion modling units, kept the steel band center consistent, do not make the distortion of band steel with the shaping machine set center; Angular aperture before the extruding is controlled between 3o ~ 4o motor power (output): 315KW, profiled section and sizing section respectively join a motor;
(3), high-frequency welding is squeezed into steel pipe: adopt solid-state high-frequency welding equipment that volume is rolled good blank socket and weld, voltage is 250 ~ 320V during welding, and electric current is 350 ~ 550A, and mill speed is 20 ~ 35 meters/minute;
(4), weld seam post processing: adopt the circular arc cutter to strike off the outside welding slag in commissure, and strike off the inwall welding slag with the inside weld remover; Simultaneously, when weld seam is in 850 ° ~ 950 ° high-temperature regions, outside weld is carried out roll extrusion, to impel the soldered structure closely and make the soldered smooth surface;
(5), the cooling processing of weld seam: butt welded seam carries out air and cools off naturally, weld seam temperature is reduced to get into but zone cooling of water-cooled below 400 ° then, guarantees the mechanical performance of welded seam area;
(6), weld seam detection: cooled steel pipe gets into eddy current flaw detec, and butt welded seam carries out random groups eddy current inspection test, confirms that through detecting weld seam is intact; Simultaneously pipe cutting carries out the internal bore welding seam>the flattening test of 180o, confirm that through detecting crackle can not be arranged; Simultaneously to internal bore welding slag sampling and measuring, guarantee that precision is in+0.00/-0.15;
(7), accuracy correction: adopt the correction unit to detect the qualified steel pipe of weld seam welding and carry out accuracy correction, guarantee its roundness≤+/-0.25;
(8), hydraulic pressure test: the steel pipe to through weld seam detection and accuracy correction carries out hydraulic pressure test, guarantees that steel pipe bears the high pressure of 18mpa, duration >=1 minute, product reaches qualified index; The steel pipe of pass the test is packaging and warehousing after tack, chamfering and antirust processing.
2. the air conditioner compressed engine housing production process of special steel pipe of vortex as claimed in claim 1 is characterized in that: said correction unit comprises that four groups are slightly proofreaied and correct unit and three groups of fine correction units.
3. the air conditioner compressed engine housing production process of special steel pipe of vortex as claimed in claim 1, it is characterized in that: the infrared ray arrangement for perspective is set up in post processing place of said weld seam, the removing of strict control inside weld welding slag.
4. the air conditioner compressed engine housing production process of special steel pipe of vortex as claimed in claim 1; It is characterized in that: said width of steel band is according to formula: (Φ-0.5S) calculates and obtains B=π; Wherein, B is a width of steel band, and Φ is the product external diameter; S is a thickness of strips, need relax 2-3.5mm at the width of steel band of above computing formula gained.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103307367A (en) * | 2013-06-05 | 2013-09-18 | 南通耀龙金属制造有限公司 | Stainless steel drinking water pipeline and manufacturing method thereof |
| CN103470873A (en) * | 2013-09-18 | 2013-12-25 | 无锡天龙钢管有限公司 | Special steel pipe for CO2 (carbon dioxide) air conditioner compressor casing and processing process of special steel pipe |
| CN104353973A (en) * | 2014-11-13 | 2015-02-18 | 江苏省常熟环通实业有限公司 | Preparation method of austenitic stainless steel pipe |
| CN104439949A (en) * | 2014-11-13 | 2015-03-25 | 江苏省常熟环通实业有限公司 | Lengthened welded steel tube manufacturing method |
| CN106271432A (en) * | 2016-08-30 | 2017-01-04 | 天津鑫凯建业科技有限公司 | A kind of steel pipes with straight manufacturing process and the reel hold down gag for this technique |
| CN113084459A (en) * | 2021-04-13 | 2021-07-09 | 中钢不锈钢管业科技山西有限公司 | Continuous intelligent forming process for stainless steel straight welded pipe |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307367A (en) * | 2013-06-05 | 2013-09-18 | 南通耀龙金属制造有限公司 | Stainless steel drinking water pipeline and manufacturing method thereof |
| CN103470873A (en) * | 2013-09-18 | 2013-12-25 | 无锡天龙钢管有限公司 | Special steel pipe for CO2 (carbon dioxide) air conditioner compressor casing and processing process of special steel pipe |
| CN104353973A (en) * | 2014-11-13 | 2015-02-18 | 江苏省常熟环通实业有限公司 | Preparation method of austenitic stainless steel pipe |
| CN104439949A (en) * | 2014-11-13 | 2015-03-25 | 江苏省常熟环通实业有限公司 | Lengthened welded steel tube manufacturing method |
| CN106271432A (en) * | 2016-08-30 | 2017-01-04 | 天津鑫凯建业科技有限公司 | A kind of steel pipes with straight manufacturing process and the reel hold down gag for this technique |
| CN113084459A (en) * | 2021-04-13 | 2021-07-09 | 中钢不锈钢管业科技山西有限公司 | Continuous intelligent forming process for stainless steel straight welded pipe |
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Application publication date: 20120919 |