CN105710180B - A kind of elongated barrel part with Inner Spiral Surface reverses forming process - Google Patents
A kind of elongated barrel part with Inner Spiral Surface reverses forming process Download PDFInfo
- Publication number
- CN105710180B CN105710180B CN201610255091.2A CN201610255091A CN105710180B CN 105710180 B CN105710180 B CN 105710180B CN 201610255091 A CN201610255091 A CN 201610255091A CN 105710180 B CN105710180 B CN 105710180B
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- CN
- China
- Prior art keywords
- section
- blank
- inner spiral
- spiral surface
- heated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 210000002435 tendon Anatomy 0.000 claims abstract description 12
- 238000001125 extrusion Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 238000007493 shaping process Methods 0.000 claims abstract description 5
- 229920000426 Microplastic Polymers 0.000 claims abstract description 3
- 238000003856 thermoforming Methods 0.000 claims abstract description 3
- 241000024411 Echinocereus adustus Species 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000001154 acute effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000000047 product Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 5
- 238000003672 processing method Methods 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013066 combination product Substances 0.000 description 1
- 229940127555 combination product Drugs 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
Classifications
-
- 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
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/14—Twisting
-
- 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
Abstract
A kind of elongated barrel part with inner helical surface reverses forming process, (1) base：Heavy wall circular section tubing is made up to the straight cylindrical blank of odd-shaped cross section of extrusion process；(2) heat：The blank that step (1) is made, using the method for sensing heating, the warm working temperature or thermoforming temperatures of heat stepwise to material therefor；(3) reverse：Heated section to the straight long cylindrical blank of odd-shaped cross section on special torsion forming machine carries out twist operation, and the convex tendon being heated on section blank, which is reversed, turns into Inner Spiral Surface；(4) step (2) and step (3) are repeated in, until the shaping of whole blanks is finished；(5) finishing：After extruding base and torsion work step, processed using micro plastic working or micro cutting so that the Inner Spiral Surface of processing meets design requirement, with reference to the required precision of finished product, it is determined whether need this finishing procedure.The present invention substantially reduces cost, improves its production efficiency.
Description
Technical field：
The present invention relates to material processing field, particularly a kind of Plastic Forming side with Inner Spiral Surface cylindrical part
Method.
Background technology：
In equipment manufacturing field, the elongate cylindrical part with Inner Spiral Surface as shown in Figure 1 has special processing
Difficulty.For technical principle, this process technology with Inner Spiral Surface part can substantially be divided into two major classes.
One is mechanical processing method, mainly including numerical control cutting, numerical control boring, numerical control planing, wire pulling method etc..Machinery
The common drawback of processing method is that processing efficiency is very low, and is only applicable to that processing diameter of bore is big, length is smaller and cutting
Measure also small workpiece.And for the big inside spin cylindrical part of the slender types such as screw pump stator, cutting output, no matter using what
Machining process is planted, special elongated knife bar is required for, this arbor stiffness is poor, and stability is bad, and process is also easy to produce
Vibration, machining accuracy can not ensure, even more so that processing technology can not be realized.
The second is electrochemical machining method.Electrolyzed Processing scheme manufactures the processing of firearms rifling from military enterprise.Electrolysis
Processing can obtain higher machining accuracy and preferable surface quality." cutter " and workpiece are not contacted in electrochemical machining process,
In the absence of machine cut power, residual stress and deformation will not be produced, the type of complexity can be gone out with simple feed motion time processing
Chamber, type face and type hole.But electrolysis belongs to that power consumption is high and the low process technology of efficiency, processes spiral shell in the screw pump of a usual specification
Stator sleeve is revolved, even with up to ten thousand amperes of Electrolyzed Processing equipment, it is also desirable to many hours of time-consuming 30-40, therefore this technology is not
It is easy to get to marketing.
The content of the invention
Production cost is reduced it is an object of the invention to provide one kind, the elongated with inner helical surface of production efficiency is improved
Barrel part reverses forming process.
Pass through the realizations of following steps：
(1) base：Heavy wall circular section tubing is made up to the straight cylindrical blank of odd-shaped cross section of extrusion process, in product
The corresponding blank position of spiral camber, the convex tendon with blank diameter parallel is made with extrusion process, as shown in Figure 2.The base made
The cross sectional shape of material and the section of product are adapted, and the section with convex tendon is profiled-cross-section；
(2) heat：The blank that step (1) is made, using the method for sensing heating, the temperature of heat stepwise to material therefor
Forming temperature or thermoforming temperatures, the outer wall and internal temperature for being heated section should be consistent, and each blank heating length is outside blank
2-3 times of footpath；
(3) reverse：Heated section to the straight cylindrical blank of odd-shaped cross section on special torsion forming machine carries out twist operation,
The convex tendon being heated on section blank, which is reversed, turns into Inner Spiral Surface, in twist process, need to make each geometry on same cross section
The angular displacement of element has identical numerical value, the size of accurate control torsion angle, you can the Inner Spiral Surface of size needed for obtaining
Helical angle, helical angle refers on the face of cylinder folded sharp between the tangent line of helix and the face of cylinder straight edge line for passing through point of contact
Angle, the relation between helical angle and asynchronous region length and torsion angle meets following formula：
In formula, the lead angle of β --- Inner Spiral Surface；
H --- it is each on blank to reverse the asynchronous region length of work step vertically；
θ --- each torsion angle reversed required for work step, i.e. radian；
D --- it is spiral shell Inner Spiral Surface central diameter, unit mm；
(4) step (2) and step (3) are repeated in, until the shaping of whole blanks is finished；
(5) finishing：After extruding base and torsion work step, processed using micro plastic working or micro cutting so that
The Inner Spiral Surface of processing meets design requirement, the required precision of combination product, it is determined whether need this finishing procedure.
The beneficial effects of the present invention are：The elongate cylindrical part Electrolyzed Processing method with Inner Spiral Surface can be substantially reduced
And the production cost of mechanical processing method, its production efficiency is improved, one is provided more for the product manufacturing with said structure feature
Economic, more effective production method.
Brief description of the drawings
Fig. 1 is the elongate cylindrical part profile with Inner Spiral Surface；
Fig. 2 is the blank profile with convex tendon after extrusion process；
Fig. 3 is the sectional dimension schematic diagram in the embodiment of the present invention 1；
Fig. 4 is the sectional dimension schematic diagram in the embodiment of the present invention 2.
Embodiment
Embodiment 1
6, certain oil field screw pump stator effective length is 3150mm, and helical angle is 38 °, and sectional dimension is as shown in figure 3, material
Expect for 42CrMo steel alloys, present case through the following steps that realizing：
(1) base：Effective length is made by the straight of odd-shaped cross section for 3150mm 6 screw pump stators by extrusion process
Cylindrical blank, blank position corresponding with product Inner Spiral Surface, makes the convex tendon with blank diameter parallel, the blank made
The section of cross sectional shape and product is adapted；
(2) heat：The blank that step (1) is made, using the method for sensing heating, the heat of heat stepwise to material therefor
1000 ° -1200 ° of forming temperature, the outer wall and internal temperature for being heated section should be consistent, and each blank heating length is no less than
350mm；
(3) reverse：Heated section to the straight long cylindrical blank of odd-shaped cross section on special torsion forming machine carries out torsion behaviour
Make, the convex tendon being heated on section blank, which is reversed, turns into inside spin song, windup-degree is calculated according to the following formula：
In formula, β is the helical angle of Inner Spiral Surface, and β is 46 °, and H is the deformed area of each torsion work step vertically on blank
Length, H is 350mm, and d is spiral shell Inner Spiral Surface central diameter, and d is 142mm, and the torsion angle required for obtaining each torsion work step is
3.88 radians (222.24 °)；
(4) 9 steps (2) and step (3) are repeated in, the shaping of the screw pump stator Inner Spiral Surface is completed.
Embodiment 2
Oil field is 3840mm with 4 screw pump stator effective lengths of certain model, and helical angle is 46 °, sectional dimension such as Fig. 4 institutes
Show, material is 42CrMo steel alloys.Present case through the following steps that realization：
(1) base：By extrusion process by effective length be the straight cylindrical blanks of 3840mm, with product Inner Spiral Surface pair
The blank position answered, makes the convex tendon with blank diameter parallel, and the cross sectional shape for the blank made and the section of product are adapted；
(2) heat：The blank that step (1) is made, using the method for sensing heating, heat stepwise to 1000 ° -1200 °,
The outer wall and internal temperature for being heated section should be consistent, and each blank heating length is the 320mm of blank external diameter；
(3) reverse：Heated section to the straight long cylindrical blank of odd-shaped cross section on forming machine is reversed carries out twist operation, quilt
Convex tendon on bringing-up section blank, which is reversed, turns into Inner Spiral Surface, and torsion angle is calculated according to the following formula：
In formula, β is the helical angle of Inner Spiral Surface, and β is 46 °, and H is the deformed area of each torsion work step vertically on blank
Length, H is 320mm, and d is spiral shell Inner Spiral Surface central diameter, and d is 122mm, and the torsion angle required for obtaining each torsion work step is
5.43 radians (311.24 °)；
(4) 12 steps (2) are repeated in and step (3) completes the shaping of the screw pump stator Inner Spiral Surface.
Claims (1)
1. a kind of elongated barrel part with Inner Spiral Surface reverses forming process, it is characterised in that：Through the following steps that reality
It is existing：(1) base：Heavy wall circular section tubing is made up to the straight cylindrical blank of odd-shaped cross section of extrusion process, with product inside spin
The corresponding blank position of curved surface, the convex tendon with blank diameter parallel is made with extrusion process, the cross sectional shape for the blank made with
The section of product is adapted, and the section with convex tendon is odd-shaped cross section；(2) heat：The blank that step (1) is made, using sense
The method that should be heated, the warm working temperature or thermoforming temperatures of heat stepwise to material therefor are heated outer wall and the inside of section
Temperature should be consistent, and each blank heating length is 2-3 times of blank external diameter；(3) reverse：To abnormity on special torsion forming machine
The heated section of the straight cylindrical blank in section carries out twist operation, and the convex tendon being heated on section blank, which is reversed, turns into Inner Spiral Surface,
In twist process, need to make the angular displacement of each geometric element on same cross section has identical numerical value, and accurate control is reversed
The size at angle, you can the helical angle of the Inner Spiral Surface of size needed for obtaining, helical angle refers to the tangent line of helix on the face of cylinder
The folded acute angle between the face of cylinder straight edge line by point of contact, the relation between helical angle and asynchronous region length and torsion angle expires
Foot formula：
In formula, the lead angle of β --- Inner Spiral Surface；
H --- it is each on blank to reverse the asynchronous region length of work step vertically；
θ --- each torsion angle reversed required for work step, i.e. radian；
D --- it is spiral shell Inner Spiral Surface central diameter, unit mm；
(4) step (2) and step (3) are repeated in, until the shaping of whole blanks is finished；(5) finishing：In extruding base and torsion
After work step, processed using micro plastic working or micro cutting so that the Inner Spiral Surface of processing meets design requirement, with reference to
The required precision of product, it is determined whether need this finishing procedure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610255091.2A CN105710180B (en) | 2016-04-22 | 2016-04-22 | A kind of elongated barrel part with Inner Spiral Surface reverses forming process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610255091.2A CN105710180B (en) | 2016-04-22 | 2016-04-22 | A kind of elongated barrel part with Inner Spiral Surface reverses forming process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105710180A CN105710180A (en) | 2016-06-29 |
| CN105710180B true CN105710180B (en) | 2017-08-11 |
Family
ID=56161477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610255091.2A Expired - Fee Related CN105710180B (en) | 2016-04-22 | 2016-04-22 | A kind of elongated barrel part with Inner Spiral Surface reverses forming process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105710180B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038484C (en) * | 1991-07-19 | 1998-05-27 | 胜利石油管理局油建一公司 | Method and apparatus for shaping spiral steel tube and bend by hot push foreward |
| US5927125A (en) * | 1994-11-04 | 1999-07-27 | The Morgan Crucible Company Plc | Methods and apparatus for manufacturing helical products |
| CN100557370C (en) * | 2007-12-12 | 2009-11-04 | 无锡锡州机械有限公司 | Spiral radiating collar heat radiating pip and production method thereof |
| JP5437944B2 (en) * | 2010-07-28 | 2014-03-12 | 常郎 後藤 | Spiral steel, its application products and spiral steel manufacturing method |
| CN202527561U (en) * | 2012-03-06 | 2012-11-14 | 抚顺化工机械设备制造有限公司 | Device for machining spiral twisted tube |
| JP5871269B2 (en) * | 2012-03-29 | 2016-03-01 | 株式会社Ｌｉｘｉｌ | Spiral tube extrusion molding method and spiral tube extrusion molding machine |
-
2016
- 2016-04-22 CN CN201610255091.2A patent/CN105710180B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN105710180A (en) | 2016-06-29 |
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Granted publication date: 20170811 |