CN106825271A - The processing method that heavy caliber thick wall extrudes cast pipe mold enlarging - Google Patents
The processing method that heavy caliber thick wall extrudes cast pipe mold enlarging Download PDFInfo
- Publication number
- CN106825271A CN106825271A CN201611203895.4A CN201611203895A CN106825271A CN 106825271 A CN106825271 A CN 106825271A CN 201611203895 A CN201611203895 A CN 201611203895A CN 106825271 A CN106825271 A CN 106825271A
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- Prior art keywords
- enlarging
- pipe
- tube blank
- extrusion tube
- heavy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention discloses the processing method that a kind of heavy caliber thick wall extrudes cast pipe mold enlarging, including：Heavy wall extrusion tube blank is disposably extruded into using vertical extruder；Heavy wall extrusion tube blank is heated using Medium frequency induction device mode of heating；Toroidal is expanded into the end of heavy wall extrusion tube blank by heavy wall extrusion tube blank hydraulic pipe expander and flaring die device to heating, is made cast pipe mold pipe.The present invention both saved material, stock utilization is improve again, at the same can improve production efficiency, reduce production cost, and heat it is economic and environment-friendly, cast pipe mold service life can be improved again.
Description
Technical field
The present invention relates to a kind of material molding fabrication techniques, specifically, it is related to a kind of heavy caliber thick wall extruding cast pipe mold to expand
The processing method of mouth.
Background technology
Cast pipe mold full name is centrifugal ductile cast iron pipes pipe die, is the mould for ductile iron pipe of casting, and is in centrifugal casting
Large-scale thermal technology's frock of ductile iron pipe is produced on pipe machine, cast pipe mold is hollow pipe fitting, and head is in toroidal, and it was used
In journey all the time under the severe working condition, under rotating at a high speed, surfaces externally and internally bear for a long time alternating thermal stress, tensile stress,
Distorting stress etc. is acted on.With the continuous expansion of city size, infrastructure is renovated, therefore various heavy caliber thick walls are cast
The demand of pipe die increasingly increases severely.
Due to the design feature and severe applying working condition condition of heavy caliber cast pipe mold, therefore to the property of heavy caliber cast pipe mold
Can require also very strict.Producer is a kind of mostly at present uses hollow forging technology, and the technology need to many fire forgings, raw material loss
Greatly, high cost；It is another to be after cast tube die section and die body are forged into processing respectively frequently with method, then two bodies are welded into one
Body, but the uniformity of cast pipe mold overall performance is difficult to be guaranteed, and shortens the service life of cast pipe mold；Cast tube die section and mould
Body is generally processed using overall through-hole type forging mode, though existing forging technology technology maturation, disclosure satisfy that the skill of required body
Art requirement, product quality stabilization, but still have that blank allowance is big, stock utilization is low, low production efficiency, cost are high etc.
Drawback.
The content of the invention
Technical problem solved by the invention is to provide the processing method that a kind of heavy caliber thick wall extrudes cast pipe mold enlarging, both
Save material, stock utilization improve again, at the same can improve production efficiency, reduce production cost, and heat economic ring
Protect, cast pipe mold service life can be improved again.
Technical scheme is as follows：
The processing method that a kind of heavy caliber thick wall extrudes cast pipe mold enlarging, including：
Heavy wall extrusion tube blank is disposably extruded into using vertical extruder；
Heavy wall extrusion tube blank is heated using Medium frequency induction device mode of heating；
Heavy wall extrusion tube blank hydraulic pipe expander and flaring die device to heating expand the end of heavy wall extrusion tube blank
Into toroidal, cast pipe mold pipe is made.
Further：First to cast pipe mold pipe enlarging particular manufacturing craft and the end intermediate frequency induction heating device of heavy wall extrusion tube blank
Preheating；Then the end to heavy wall extrusion tube blank is heated with intermediate frequency induction heating device.
Further：Cast pipe mold pipe enlarging particular manufacturing craft with intermediate frequency induction heating device preheat, preheating temperature be 500 DEG C~
600 DEG C, soaking time 0.5h~1h.
Further：The end of heavy wall extrusion tube blank is preheated with intermediate frequency induction heating device, and preheating temperature is 150 DEG C~250
DEG C, 0.5h is incubated, the space of pipe and coil is between 30~50mm.
Further：The end of heavy wall extrusion tube blank is heated with intermediate frequency induction heating device, heating-up temperature is 800 DEG C~
850 DEG C, soaking time 0.5h, between pipe and the 30~50mm of space of coil.
Further：Heavy wall extrusion tube blank is extruded with 360MN vertical extruders, heavy wall extrusion tube blank is arranged on intermediate frequency is housed
On 1400 tons of hydraulic pipe expanders of induction heating apparatus and enlarging particular manufacturing craft；
Cast pipe mold pipe enlarging particular manufacturing craft is preheated with intermediate frequency induction heating device, preheating temperature is 500 DEG C~600 DEG C,
Soaking time 0.5h；The end of heavy wall extrusion tube blank is preheated with intermediate frequency induction heating device, pipe preheating temperature is 150 DEG C~
250 DEG C, it is incubated 0.5h；
To the end intermediate frequency sense heating devices heat of heavy wall extrusion tube blank, heating-up temperature is 800 DEG C~850 DEG C, intermediate frequency
Induction coil is diameter 1200mm × length 850mm using specification, between pipe and the 30~50mm of space of coil；
To the end of the heavy wall extrusion tube blank after heating on 1400 tons of hydraulic pipe expanders, with flaring die device enlarging,
It is made cast pipe mold pipe；During pushing, pushing power is 350~450 tons, and push system speed is 45~50mm/min.
Further：Flaring die device includes enlarging core print component, enlarging pull bar and adapter sleeve component, and adapter sleeve component will
Enlarging core print component links together with enlarging pull bar, and is fixed on pipe expander.
Compared with prior art, the technology of the present invention effect includes：
The present invention both saved material, and improved stock utilization, while improve production efficiency, reduces production cost, and add
Heat economy environmental protection；The defect produced by cast pipe mold split welding is avoided simultaneously, it is ensured that the uniformity of cast pipe mold overall performance,
Improve cast pipe mold service life.
The present invention can fill up domestic manufacture heavy caliber die blank manufacturing gap, lift product competitiveness in the market.If will
The technology is applied in actual production, with Development and Production DN800 pipe dies, according to 300 calculating are produced per year, is capable of achieving sales volume
64500000, get a profit 1,650,000 yuan or so.
Brief description of the drawings
Fig. 1 is the structure chart of DN800 cast pipe mold extrusion tube blanks in the present invention；
Fig. 2 is the structure chart of flaring die device in the present invention；
Fig. 3 is the structure chart of DN800 cast pipe mold pipes in the present invention.
Specific embodiment
Technical solution of the present invention is elaborated below with reference to example embodiment.However, example embodiment can
Implement in a variety of forms, and be not understood as limited to implementation method set forth herein；Conversely, thesing embodiments are provided so that
The design of example embodiment more comprehensively and completely, and is comprehensively conveyed to those skilled in the art by the present invention.
The processing method that heavy caliber thick wall extrudes cast pipe mold enlarging, comprises the following steps that：
Step 1：Heavy wall extrusion tube blank is disposably extruded into using vertical extruder；
Step 2：Heavy wall extrusion tube blank is heated using Medium frequency induction device mode of heating；
First the end to cast pipe mold pipe enlarging particular manufacturing craft and heavy wall extrusion tube blank is preheated with intermediate frequency induction heating device；So
The end to heavy wall extrusion tube blank is heated with intermediate frequency induction heating device afterwards.
Cast pipe mold pipe enlarging particular manufacturing craft is preheated with intermediate frequency induction heating device, preheating temperature is 500 DEG C~600 DEG C,
Soaking time 0.5h~1h.
The end of heavy wall extrusion tube blank is preheated with intermediate frequency induction heating device, and preheating temperature is 150 DEG C~250 DEG C, insulation
Between the 30~50mm of space of 0.5h, pipe and coil, to ensure the thermal efficiency of maximum.
End to heavy wall extrusion tube blank is heated with intermediate frequency induction heating device, and heating-up temperature is 800 DEG C~850 DEG C, is protected
With the thermal efficiency of guarantee maximum between the 30~50mm of space of warm time 0.5h, pipe and coil.
Step 3：Heavy wall extrusion tube blank hydraulic pipe expander and supporting flaring die device to heating extrude heavy wall
Toroidal is expanded into the end of pipe, completes the making of cast pipe mold pipe.
Hydraulic pipe expander carries out enlarging, intermediate frequency induction heating device and enlarging particular manufacturing craft using 1400 tons of hydraulic pipe expanders
On 1400 tons of hydraulic pipe expanders.
By taking DN800 cast pipe molds as an example, the material of DN800 cast pipe molds is 21CrMo10.Heavy caliber thick wall extruding cast pipe mold expands
The step of processing method of mouth, is as follows：
As shown in figure 1, being the structure chart of DN800 cast pipe mold extrusion tube blanks in the present invention.
1) the heavy wall extrusion tube blank (DN800 cast pipe molds) being extruded into 360MN vertical extruders is arranged on equipped with intermediate frequency
On 1400 tons of hydraulic pipe expanders of induction heating apparatus and enlarging particular manufacturing craft；
2) heavy wall extrusion tube blank flaring die is preheated with intermediate frequency induction heating device, preheating temperature is 500 DEG C~600
DEG C, soaking time 0.5h；
3) end to heavy wall extrusion tube blank is preheated with intermediate frequency induction heating device, and pipe preheating temperature is 150 DEG C~250
DEG C, it is incubated 0.5h；
4) to the end intermediate frequency sense heating devices heat of heavy wall extrusion tube blank, heating-up temperature is 800 DEG C~850 DEG C, in
Frequency induction coil is 1200mm (diameter) × 850mm (length) using specification, between pipe and the 30~50mm of space of coil, with
Ensure the maximum thermal efficiency；
As shown in Fig. 2 being the structure chart of flaring die device in the present invention.
Flaring die device includes：Enlarging core print component 1, enlarging pull bar 2 and adapter sleeve component 3, adapter sleeve component 3 will expand
Mouth core print component 1 links together with enlarging pull bar 3, and is fixed on pipe expander.
5) end of the heavy wall extrusion tube blank after heating is entered on 1400 tons of hydraulic pipe expanders using flaring die device
Row enlarging, is made cast pipe mold pipe；During pushing, pushing power：350~450 tons, push system speed：45~50mm/min.
As shown in figure 3, being the structure chart of cast pipe mold pipe in the present invention.
Heavy wall extrusion tube blank head is expanded into toroidal, the making of cast pipe mold is completed.
By taking DN800 cast pipe molds as an example, compared with forging method, stock utilization improves about 10%, section to compression flare method
About raw material about 4t, saves about 10,000 yuan of production cost；The supply problem of domestic heavy caliber pipe die, riser molding are solved simultaneously
Strength is made, rising to for domestic large-diameter pipe mould manufacturing technology is promoted.
Term used herein is explanation and exemplary and nonrestrictive term.Because the present invention can be with various
Form specific implementation without deviating from invention it is spiritual or substantive, it should therefore be appreciated that above-described embodiment be not limited to it is any foregoing
Details, and widely being explained in the spirit and scope that should be limited in appended claims, thus fall into claim or its etc.
Whole changes and remodeling in the range of effect all should be appended claims and covered.
Claims (7)
1. the processing method that a kind of heavy caliber thick wall extrudes cast pipe mold enlarging, including：
Heavy wall extrusion tube blank is disposably extruded into using vertical extruder；
Heavy wall extrusion tube blank is heated using Medium frequency induction device mode of heating；
Loudspeaker is expanded into the end of heavy wall extrusion tube blank by heavy wall extrusion tube blank hydraulic pipe expander and flaring die device to heating
The degree of lip-rounding, is made cast pipe mold pipe.
2. the processing method that heavy caliber thick wall as claimed in claim 1 extrudes cast pipe mold enlarging, it is characterised in that：First to cast pipe mold
The end of pipe enlarging particular manufacturing craft and heavy wall extrusion tube blank is preheated with intermediate frequency induction heating device；Then to heavy wall extrusion tube blank
Heated with intermediate frequency induction heating device end.
3. the processing method that heavy caliber thick wall as claimed in claim 2 extrudes cast pipe mold enlarging, it is characterised in that：Cast pipe mold pipe expands
Mouth particular manufacturing craft is preheated with intermediate frequency induction heating device, and preheating temperature is 500 DEG C~600 DEG C, soaking time 0.5h~1h.
4. the processing method that heavy caliber thick wall as claimed in claim 2 extrudes cast pipe mold enlarging, it is characterised in that：Heavy wall extruded tube
The end of base is preheated with intermediate frequency induction heating device, and preheating temperature is 150 DEG C~250 DEG C, is incubated the sky of 0.5h, pipe and coil
Gap is between 30~50mm.
5. the processing method that heavy caliber thick wall as claimed in claim 2 extrudes cast pipe mold enlarging, it is characterised in that：Heavy wall is extruded
The end of pipe is heated with intermediate frequency induction heating device, and heating-up temperature is 800 DEG C~850 DEG C, soaking time 0.5h, pipe and line
Between the 30~50mm of space of circle.
6. the processing method that heavy caliber thick wall as claimed in claim 1 extrudes cast pipe mold enlarging, it is characterised in that：
Heavy wall extrusion tube blank is extruded with 360MN vertical extruders, heavy wall extrusion tube blank is arranged on equipped with Frequency Induction Heating dress
Put on 1400 tons of hydraulic pipe expanders with enlarging particular manufacturing craft；
Cast pipe mold pipe enlarging particular manufacturing craft is preheated with intermediate frequency induction heating device, preheating temperature is 500 DEG C~600 DEG C, insulation
Time 0.5h；End to heavy wall extrusion tube blank is preheated with intermediate frequency induction heating device, and pipe preheating temperature is 150 DEG C~250
DEG C, it is incubated 0.5h；
To the end intermediate frequency sense heating devices heat of heavy wall extrusion tube blank, heating-up temperature is 800 DEG C~850 DEG C, Medium frequency induction
Coil is diameter 1200mm × length 850mm using specification, between pipe and the 30~50mm of space of coil；
To the end of the heavy wall extrusion tube blank after heating on 1400 tons of hydraulic pipe expanders, with flaring die device enlarging, it is made
Cast pipe mold pipe；During pushing, pushing power is 350~450 tons, and push system speed is 45~50mm/min.
7. the processing method that the heavy caliber thick wall as described in any one of claim 1 to 6 extrudes cast pipe mold enlarging, it is characterised in that：
Flaring die device include enlarging core print component, enlarging pull bar and adapter sleeve component, adapter sleeve component by enlarging core print component with
Enlarging pull bar links together, and is fixed on pipe expander.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611203895.4A CN106825271B (en) | 2016-12-23 | 2016-12-23 | The processing method that heavy caliber thick wall squeezes cast pipe mold flaring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611203895.4A CN106825271B (en) | 2016-12-23 | 2016-12-23 | The processing method that heavy caliber thick wall squeezes cast pipe mold flaring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106825271A true CN106825271A (en) | 2017-06-13 |
| CN106825271B CN106825271B (en) | 2019-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611203895.4A Active CN106825271B (en) | 2016-12-23 | 2016-12-23 | The processing method that heavy caliber thick wall squeezes cast pipe mold flaring |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110480258A (en) * | 2019-07-18 | 2019-11-22 | 安徽润盈建材有限公司 | A kind of metal bamboo continuous mould molding expanding and shaping technique |
| CN111069492A (en) * | 2019-12-31 | 2020-04-28 | 中钢集团邢台机械轧辊有限公司 | Cold-type blank forging method for centrifugal machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4352387A (en) * | 1979-05-24 | 1982-10-05 | Sankyo Oilless Industry, Inc. | Process for producing a hollow cast product |
| CN1248501A (en) * | 1999-07-23 | 2000-03-29 | 广州南方管道有限公司 | Process for expanding end of large diameter thick wall steel pipe |
| CN101704084A (en) * | 2009-11-09 | 2010-05-12 | 新兴铸管股份有限公司 | Centrifugal cast tube die and manufacturing technique thereof |
| CN101745557A (en) * | 2010-02-04 | 2010-06-23 | 北京机电研究所 | Extrusion manufacturing technology of large-caliber reducing joint high-pressure pipe fitting with high steel grade |
| CN203343309U (en) * | 2013-07-04 | 2013-12-18 | 新兴铸管股份有限公司 | Thermal expansion device for metallurgical bonding bimetal tube |
-
2016
- 2016-12-23 CN CN201611203895.4A patent/CN106825271B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4352387A (en) * | 1979-05-24 | 1982-10-05 | Sankyo Oilless Industry, Inc. | Process for producing a hollow cast product |
| CN1248501A (en) * | 1999-07-23 | 2000-03-29 | 广州南方管道有限公司 | Process for expanding end of large diameter thick wall steel pipe |
| CN101704084A (en) * | 2009-11-09 | 2010-05-12 | 新兴铸管股份有限公司 | Centrifugal cast tube die and manufacturing technique thereof |
| CN101745557A (en) * | 2010-02-04 | 2010-06-23 | 北京机电研究所 | Extrusion manufacturing technology of large-caliber reducing joint high-pressure pipe fitting with high steel grade |
| CN203343309U (en) * | 2013-07-04 | 2013-12-18 | 新兴铸管股份有限公司 | Thermal expansion device for metallurgical bonding bimetal tube |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110480258A (en) * | 2019-07-18 | 2019-11-22 | 安徽润盈建材有限公司 | A kind of metal bamboo continuous mould molding expanding and shaping technique |
| CN111069492A (en) * | 2019-12-31 | 2020-04-28 | 中钢集团邢台机械轧辊有限公司 | Cold-type blank forging method for centrifugal machine |
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| Publication number | Publication date |
|---|---|
| CN106825271B (en) | 2019-01-29 |
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