CN112496689A - Manufacturing process method of plate welding pipe die - Google Patents
Manufacturing process method of plate welding pipe die Download PDFInfo
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- CN112496689A CN112496689A CN202011138694.7A CN202011138694A CN112496689A CN 112496689 A CN112496689 A CN 112496689A CN 202011138694 A CN202011138694 A CN 202011138694A CN 112496689 A CN112496689 A CN 112496689A
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- welding
- pipe die
- shell ring
- flange
- plate
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- 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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
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- 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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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Abstract
The invention discloses a manufacturing process method of a plate-welded pipe die, which comprises a flange, a plurality of barrel sections, two raceways and a baffle ring, wherein the flange, the plurality of barrel sections, the two raceways and the baffle ring are assembled and welded to form a plate-welded pipe die blank, and appropriate machining allowances are reserved on each surface of the flange, the plurality of barrel sections, the two raceways and the baffle ring; the specific manufacturing process comprises the following steps: step one, selecting materials for the shell ring; step two, blanking and heating; step three, closing and welding; step four, processing a flange, a raceway and a baffle ring; and step five, manufacturing and processing the whole blank of the pipe die body. According to the manufacturing process method of the plate welding pipe die, the advantages of low cost can be realized through the steps of I, II, III, IV and V, the pipe die is machined by using an integral forging blank at the initial stage, the cost is high, and the cost is reduced by about 1/3 after the plate welding pipe die is changed; the advantage of short production period is realized; the advantages of convenient extraction and smooth surface are realized.
Description
Technical Field
The invention belongs to the technical field of manufacturing of plate-welded pipe dies, and particularly relates to a manufacturing process method of a plate-welded pipe die.
Background
The pipe die is a device for producing metal water-cooling type nodular cast iron pipes with different sizes, is also called as a metal water-cooling type nodular cast iron pipe die and is mainly used for producing nodular cast iron pipelines.
The pipe die is a die for producing a centrifugal cast pipe, the cost of the pipe die accounts for 1/5 of the production cost of the cast pipe according to the calculation, the cost of the hot die above DN1000 is higher, the existing manufacturing process method for the plate welding pipe die is processed by using a forging blank, the material taking by a user is not convenient, the production period of the forging is long, and the material cost of the forging is very high.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a manufacturing process method of a plate-welded pipe die, which has the advantages of low cost, short production period and convenience in material taking, and solves the problems that the existing manufacturing process method of the plate-welded pipe die is processed by using a forging blank, the material taking is inconvenient for a user, the production period of the forging is long, and the material cost of the forging is very high.
The invention is realized in this way, a manufacturing process method of the plate welding pipe die, including flange, several shell ring, two raceways and baffle ring, the flange, several shell ring, two raceways and baffle ring are assembled and welded to form the plate welding pipe die blank, and the flange, several shell ring, two raceways and baffle ring are all left with proper machining allowance;
the specific manufacturing process comprises the following steps:
step one, shell section material selection: determining the position of a welding girth according to the length sizes of pipe dies with different specifications, determining the number of sections of a cylinder section, determining the width and length size of a purchased steel plate according to the length of the cylinder section and the length of the middle diameter expansion of the cylinder section, wherein the length direction of the steel plate needs to be added with the amount of a pressure head of 200mm at each end, and the thickness of the steel plate is determined by the forming processing amount of more than 10mm left inside and outside the net wall thickness of a die body;
step two, blanking and heating: feeding the lower steel plate material into a furnace for heating, wherein the heating temperature is an important parameter;
step three, closing welding: winding the shell ring by using upper four-roller equipment, marking a gas cutting line after primary closing, processing a longitudinal weld seam groove line by using a single-arm planer, wherein a groove special for a U-shaped narrow gap welding machine is adopted for the groove, the groove processed by the gas cutter is heated by an annealing furnace, the upper four rollers are subjected to secondary closing, then the upper narrow gap welding equipment is welded, the groove processed by the gas cutter is subjected to circle correction heating again in the furnace after the welding is finished, and the shell ring is subjected to normalizing treatment again to ensure that the required hardness and various mechanical properties of a pipe die are achieved;
step four, processing a flange, a raceway and a baffle ring: because the walls of the flange, the roller path and the baffle ring are thicker, the flanges, the roller path and the baffle ring are all designed into forgings, and the inner circle, the outer circle, the circular seam grooves of two end surfaces and the circular seam grooves of two end surfaces of the shell ring are processed according to a single-piece one-step processing diagram;
step five, manufacturing and processing the whole blank of the pipe die body: and manufacturing blank patterns according to the pipe die body, welding circumferential welds together, wherein the circumferential welds are required to be identical to longitudinal welds of the shell ring, after welding, all the circumferential welds and the longitudinal welds are subjected to flaw detection, annealing treatment is performed in an annealing furnace after the circumferential welds and the longitudinal welds are qualified, and finally, the circumferential welds and the longitudinal welds are processed by a 3m horizontal lathe to be processed into finished products according to finished product patterns.
In the present invention, it is preferable that the steel plate is too thick (the steel plate used in the DN1400 specification is δ 80 and the steel plate used in the DN2200 specification is δ 130) in the barrel section processing, so that it is necessary to purchase a steel plate of a predetermined size to reduce the stub waste.
Preferably, when the shell ring is rolled, the temperature of the shell ring rolled by the upper four-roller device is controlled to be 700-750 ℃, if the temperature is higher than the temperature, the steel plate is easy to be rolled thin, and if the temperature is lower than the temperature, the shell ring is not formed to the required size, and the shell ring cannot be rolled.
Preferably, the shell ring is welded and heated at the same time, and is preheated before welding, wherein the preheating temperature is as follows: 300-400 ℃, the heat after hydrogen elimination after welding is 300-400 ℃, the heating temperature for cylinder section circle correction is controlled at 600-650 ℃, the heating temperature for cylinder section is 850-950 ℃, and the air is blown with cold air for cooling.
Preferably, the processing equipment of the flange, the raceway and the baffle ring is a large vertical lathe.
Compared with the prior art, the invention has the following beneficial effects:
according to the manufacturing process method of the plate welding pipe die, the advantages of low cost can be realized through the steps of I, II, III, IV and V, the pipe die is machined by using an integral forging blank at the initial stage, the cost is high, and the cost is reduced by about 1/3 after the plate welding pipe die is changed; the advantage of short production period is realized, the production period of a forging blank manufacturer is very long, so the total production period of the forging pipe die is also very long, the normal production of a cast pipe company is often influenced, after the pipe die is welded by using the plate, the production period of the steel plate is far shorter than that of the forging, the production period of the plate welding pipe die is also greatly shortened, and the development of the company is greatly promoted; the advantages of convenient extraction and smooth surface are realized, the forging pipe die is an integral pipe die formed by a plurality of sections, the middle part of the integral pipe die is provided with a connecting seam, the first produced cast pipe cannot be conveniently extracted, the outer surface of the second cast pipe is provided with a mark, and the surface is rough; the plate welding pipe die is integrated, so that the surface of the produced cast pipe has no mark and is smooth, and the produced cast pipe is easy to pull.
Drawings
FIG. 1 is a schematic illustration of a blank plate weld tube die provided in the present invention;
FIG. 2 is a schematic cross-sectional view of a blank for a plate welded pipe die according to the present invention.
In the figure: 1. a flange; 2. a shell ring; 3. a raceway; 4. a baffle ring; 5. a circumferential weld; 6. a longitudinal weld.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.
The structure of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 2, a manufacturing process method of a plate-welded pipe die provided in an embodiment of the present invention includes a flange 1, a plurality of barrel sections 2, two raceways 3, and a retainer ring 4, wherein the flange 1, the plurality of barrel sections 2, the two raceways 3, and the retainer ring 4 are assembled and welded to form a blank of the plate-welded pipe die, and appropriate machining allowances are left on each surface of the flange 1, the plurality of barrel sections 2, the two raceways 3, and the retainer ring 4;
the specific manufacturing process comprises the following steps:
step one, selecting materials for the shell section 2: the method comprises the steps of determining the position of a welding girth weld 5 according to the length of pipe dies with different specifications, determining the number of sections of a shell ring 2, determining the width and the length of a purchased steel plate according to the length of the shell ring 2 and the length of the middle diameter of the shell ring 2, wherein the length direction of the steel plate needs to be added with the amount of a pressure head of 200mm at each end, the thickness of the steel plate is determined by the forming processing amount of more than 10mm respectively left inside and outside the net wall thickness of a die body, and the steel plate is too thick in the processing of the shell ring 2, the thickness of the steel plate used in the minimum specification DN1400 is delta 80, and the thickness of the steel plate used in the specification DN2200 is delta 130, so that;
step two, blanking and heating: the lower steel plate material is fed into a furnace and heated, the heating temperature is an important parameter, when the cylinder section 2 is rolled, the temperature is controlled to be 700-750 ℃ when the cylinder section 2 is rolled by the upper four-roller device, if the temperature is higher than the temperature, the steel plate is easy to be thinned, and if the temperature is lower than the temperature, the cylinder section 2 cannot be rolled until the required size is formed;
step three, closing welding: go up four roller equipment and roll up and make 2 sections of a barrel and draw the gas secant after closing a mouthful once, single armed planer processing longitudinal weld 6 groove lines, the special groove of U type narrow gap welding machine will be adopted to the groove, gas cutting machine processing groove back annealing stove heating, go up four rollers and carry out the secondary and close a mouthful again, later go up narrow gap welding equipment welding, the welding finishes the back stove and carries out school circle heating once more, 2 sections of a barrel carry out normalizing treatment again, make it reach the required hardness of pipe die and each item mechanical properties, 2 sections of a barrel will weld the limit heating during welding, and weld and preheat before, preheating temperature is: 300-400 ℃, heat is removed after hydrogen is removed after welding, the temperature is 300-400 ℃, the heating temperature of the cylinder section 2 for circle correction is controlled to be 600-650 ℃, the heating temperature of the cylinder section 2 is 850-950 ℃, and cooling air is blown in the air for cooling;
step four, processing the flange 1, the raceway 3 and the baffle ring: the flange 1, the raceway 3 and the baffle ring 4 are designed into forgings because of thicker walls, the inner circle and the outer circle are processed according to a single piece one-time processing drawing, the circular seam grooves of the two end surfaces and the circular seam grooves of the two end surfaces of the shell ring 2 are processed, and the processing equipment of the flange 1, the raceway 3 and the baffle ring 4 is a large vertical lathe;
step five, manufacturing and processing the whole blank of the pipe die body: and manufacturing blank patterns according to a pipe die body, welding the circumferential welds 5 together, wherein the requirement is the same as that of the longitudinal welds 6 of the shell ring 2, after welding, all the circumferential welds 5 and the longitudinal welds 6 are subjected to flaw detection, after the flaw detection is finished, annealing treatment is performed by an annealing furnace for stress relief after the flaw detection is qualified, and finally, the blank patterns are processed on a 3m horizontal lathe and processed into finished products according to finished product patterns.
In summary, the following steps: according to the manufacturing process method of the plate welding pipe die, the advantages of low cost can be realized through the steps of I, II, III, IV and V, the pipe die is machined by using an integral forging blank at the initial stage, the cost is high, and the cost is reduced by about 1/3 after the plate welding pipe die is changed; the advantage of short production period is realized, the production period of a forging blank manufacturer is very long, so the total production period of the forging pipe die is also very long, the normal production of a cast pipe company is often influenced, after the pipe die is welded by using the plate, the production period of the steel plate is far shorter than that of the forging, the production period of the plate welding pipe die is also greatly shortened, and the development of the company is greatly promoted; the advantages of convenient extraction and smooth surface are realized, the forging pipe die is an integral pipe die formed by a plurality of sections, the middle part of the integral pipe die is provided with a connecting seam, the first produced cast pipe cannot be conveniently extracted, the outer surface of the second cast pipe is provided with a mark, and the surface is rough; the plate welding pipe die is integrated, so that the surface of the produced cast pipe has no mark and is smooth, and the produced cast pipe is easy to pull.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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. A manufacturing process method of a plate welding pipe die is characterized by comprising the following steps: the plate welding pipe die blank comprises a flange (1), a plurality of barrel sections (2), two rolling ways (3) and a baffle ring (4), wherein the flange (1), the plurality of barrel sections (2), the two rolling ways (3) and the baffle ring (4) are assembled and welded to form the plate welding pipe die blank, and appropriate machining allowance is reserved on each surface of the flange (1), the plurality of barrel sections (2), the two rolling ways (3) and the baffle ring (4);
the specific manufacturing process comprises the following steps:
step one, selecting materials for the shell ring (2): determining the position of a welding girth weld (5) according to the length sizes of pipe dies with different specifications, determining the number of sections of a cylinder section (2), determining the width and length size of a purchased steel plate according to the length of the cylinder section (2) and the length of the middle diameter expansion of the cylinder section (2), wherein the length direction of the steel plate needs to be added with the amount of a pressure head of 200mm at each end, and the thickness of the steel plate is determined by the forming processing amount of more than 10mm left inside and outside the net wall thickness of a die body;
step two, blanking and heating: feeding the lower steel plate material into a furnace for heating, wherein the heating temperature is an important parameter;
step three, closing welding: winding the shell ring (2) by using upper four-roller equipment, marking a gas cutting line after primary closing, machining a groove line of a longitudinal welding line (6) by using a single-arm planer, wherein the groove is a special groove for a U-shaped narrow gap welding machine, heating by using an annealing furnace after the groove is machined by using the gas cutter, performing secondary closing on the upper four rollers, welding by using upper narrow gap welding equipment, performing circle correction heating again in a furnace after welding is finished, and performing normalizing treatment on the shell ring (2) to enable the shell ring to reach the hardness and various mechanical properties required by a pipe die;
step four, processing the flange (1), the raceway (3) and the baffle ring (4): because the walls of the flange (1), the roller path (3) and the baffle ring (4) are thicker, the flanges are designed into forgings, and the inner circle, the outer circle, the circular seam grooves of two end surfaces and the circular seam grooves of two end surfaces of the shell ring (2) are processed according to a single-piece one-step processing diagram;
step five, manufacturing and processing the whole blank of the pipe die body: and (3) welding the circumferential welds (5) together according to the blank pattern group manufactured by the pipe die body, wherein the requirement is the same as that of the longitudinal welds (6) of the shell ring (2), after welding, all the circumferential welds (5) and the longitudinal welds (6) are subjected to flaw detection inspection, after the circumferential welds and the longitudinal welds are qualified, annealing treatment is performed by an annealing furnace for stress relief, and finally, the circumferential welds and the longitudinal welds are processed by a 3m horizontal lathe to form a finished product according to a finished product pattern.
2. The process for manufacturing a plate-welded pipe die according to claim 1, wherein: when the shell ring (2) is processed, because the steel plate is too thick, the thickness of the steel plate used in the minimum specification DN1400 is delta 80, and the thickness of the steel plate used in the specification DN2200 is delta 130, the fixed-length steel plate needs to be purchased for reducing the waste of stub bars.
3. The process for manufacturing a plate-welded pipe die according to claim 1, wherein: when the shell ring (2) is rolled, the temperature of the shell ring (2) rolled by four-roller equipment is controlled to be 700-750 ℃, if the temperature is higher than the temperature, the steel plate is easy to be rolled to be thin, and if the temperature is lower than the temperature, the shell ring (2) is not formed to the required size and cannot be rolled.
4. The process for manufacturing a plate-welded pipe die according to claim 1, wherein: the shell ring (2) will weld the while heating during welding, and will preheat before welding, and preheating temperature is: 300-400 ℃, the heat is removed after welding at the temperature of 300-400 ℃, the heating temperature for circle calibration of the shell ring (2) is controlled at 600-650 ℃, the heating temperature of the shell ring (2) is 850-950 ℃, and the shell ring is cooled by blowing cold air in the air.
5. The process for manufacturing a plate-welded pipe die according to claim 1, wherein: and the processing equipment of the flange (1), the raceway (3) and the baffle ring (4) is a large vertical lathe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011138694.7A CN112496689A (en) | 2020-10-22 | 2020-10-22 | Manufacturing process method of plate welding pipe die |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011138694.7A CN112496689A (en) | 2020-10-22 | 2020-10-22 | Manufacturing process method of plate welding pipe die |
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| CN112496689A true CN112496689A (en) | 2021-03-16 |
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| CN202011138694.7A Pending CN112496689A (en) | 2020-10-22 | 2020-10-22 | Manufacturing process method of plate welding pipe die |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2194228Y (en) * | 1994-04-29 | 1995-04-12 | 丁建东 | Cast iron pipe die blank |
| WO2004037507A1 (en) * | 2002-10-18 | 2004-05-06 | Hobas Engineering Gmbh | Matrix for producing plastic pipes by centrifugal casting |
| CN201055905Y (en) * | 2007-07-11 | 2008-05-07 | 王炳强 | Large-scale anticentripetal spheroidal graphite cast iron pipe mold |
| CN101284348A (en) * | 2008-05-30 | 2008-10-15 | 邯郸新兴重型机械有限公司 | Preparation technique of sheet welding water cooling tube die |
| CN201596753U (en) * | 2010-01-22 | 2010-10-06 | 邯郸新兴重型机械有限公司 | Pipe die of large-caliber plate welding centrifugal cast pipe |
| CN102240897A (en) * | 2011-05-09 | 2011-11-16 | 新兴铸管股份有限公司 | Method for manufacturing water-cooling type double-metal pipe die |
| KR20140147899A (en) * | 2013-06-18 | 2014-12-31 | 현대하이스코 주식회사 | Hot forming steel pipe including a region having more than 1500 MPa strength and a region having more than 12% elongation and method of fabricating the same |
-
2020
- 2020-10-22 CN CN202011138694.7A patent/CN112496689A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2194228Y (en) * | 1994-04-29 | 1995-04-12 | 丁建东 | Cast iron pipe die blank |
| WO2004037507A1 (en) * | 2002-10-18 | 2004-05-06 | Hobas Engineering Gmbh | Matrix for producing plastic pipes by centrifugal casting |
| CN201055905Y (en) * | 2007-07-11 | 2008-05-07 | 王炳强 | Large-scale anticentripetal spheroidal graphite cast iron pipe mold |
| CN101284348A (en) * | 2008-05-30 | 2008-10-15 | 邯郸新兴重型机械有限公司 | Preparation technique of sheet welding water cooling tube die |
| CN201596753U (en) * | 2010-01-22 | 2010-10-06 | 邯郸新兴重型机械有限公司 | Pipe die of large-caliber plate welding centrifugal cast pipe |
| CN102240897A (en) * | 2011-05-09 | 2011-11-16 | 新兴铸管股份有限公司 | Method for manufacturing water-cooling type double-metal pipe die |
| KR20140147899A (en) * | 2013-06-18 | 2014-12-31 | 현대하이스코 주식회사 | Hot forming steel pipe including a region having more than 1500 MPa strength and a region having more than 12% elongation and method of fabricating the same |
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Application publication date: 20210316 |