CN104525659A - Calculating method for feeding of thin-walled bent copper pipes - Google Patents
Calculating method for feeding of thin-walled bent copper pipes Download PDFInfo
- Publication number
- CN104525659A CN104525659A CN201410615902.6A CN201410615902A CN104525659A CN 104525659 A CN104525659 A CN 104525659A CN 201410615902 A CN201410615902 A CN 201410615902A CN 104525659 A CN104525659 A CN 104525659A
- Authority
- CN
- China
- Prior art keywords
- pipe
- length
- bend
- copper pipe
- bend pipe
- 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.)
- Granted
Links
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
- B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
- B21D11/07—Making serpentine-shaped articles by bending essentially in one plane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
- G16Z99/00—Subject matter not provided for in other main groups of this subclass
Abstract
The invention relates to a calculating method for feeding of thin-walled bent copper pipes. The method comprises the following steps: bending a plurality of copper pipes of different lengths and different specifications at a certain angle on a pipe bending machine, setting the initial lengths of the copper pipes as L0, setting a pipe bending radius as R, measuring the actual lengths L of the bent copper pipes along the center lines of the bent copper pipes, and calculating the average value LAverage of the actual lengths of the bent copper pipes of all specifications. Therefore, the pipe bending elongation Delta is equal to LAverage-L0; and when the pipe bending angle is Theta, the pipe bending elongation Delta Theta is equal to (180-Theta)Delta/90, and the lengths LN' of the bending points of the Nth segments of the bent copper pipes are equal to L1+(180-Theta1)PiR/180-(180-Theta1)Delta/90+L2 + ...... + (180-ThetaN-1)PiR/180-(180-ThetaN-1)Delta/90+LN. The axial lengths of the central lines of the bent copper pipes produced according to the method have little difference; the pipe bending is simple; and the accuracy is high.
Description
Technical field
The present invention relates to copper pipe processing field, particularly relate to a kind of computational methods of thin-wall copper pipe blanking bend tube.
Background technology
Thin wall type copper bend pipe is widely used in the equipment such as refrigeration system, air-conditioning, heat exchange.The batch production of copper bend pipe is generally cold roll forming on CNC tube bending machine, with reference to shown in Fig. 1-2, bending die 3 is placed on copper pipe 1, the center of bending die 3 and a curved position alignment of copper pipe 1, the side that copper pipe 1 need bend is clamped with clamp 4, do not needed by copper pipe 1 side bent to be placed on guide plate 5, by interior insertion multi-stage loose-core 2, utilize bending machine brake forming.In forming process, outboard tube wall produces stretcher strain inner side tube wall and then produces pressurized shortening distortion, the center line after forming elbow is so caused to have larger difference along the straight tube center line axial length before forming direction total length and bend pipe, caused by the plastic elongation of this difference namely in the forming process of each bend pipe position and compression, when in one section of bend pipe, clod wash position is more, this difference value is larger.Like this with regard to for determining to bring difficulty in the position of blank size before bend pipe and the curved inflection point of per pass, the compact dimensions after bend pipe cannot be ensured.
How to found the computational methods of the new thin-wall copper pipe blanking bend tube that a kind of bend pipe CB axial length difference is little, bend pipe is simple, the degree of accuracy is high, the current important research and development problem of real genus.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of computational methods of thin-wall copper pipe blanking bend tube, makes that its centerline axis is little to difference in length, bend pipe is simple, the degree of accuracy is high.
For solving the problems of the technologies described above, the invention provides a kind of computational methods of thin-wall copper pipe blanking bend tube, comprising the following steps: first, get equal length, the copper pipe of different size severally curvedly on bending machine gets certain angle, if the initial length of copper pipe is L
0, elbow radius is R, the length L of copper pipe after going out actual forming elbow along the central line measurement of bend pipe, calculate every in the copper pipe of specification bend after the mean value L of physical length
all, so, bend pipe elongation △=L
all-L
0, then when the angle between bend pipe angle and adjacent two straight lengths is θ, the bend pipe elongation △ of copper pipe
θ=(180-θ) △/90,
If the length L of inflection point during first paragraph copper pipe bend pipe
1'=L
1,
The length L of the inflection point then during second segment copper pipe bend pipe
2'=L
1+ (180-θ
1) π R/180-(180-θ
1) △/90+L
2,
The length L of inflection point during the 3rd section of copper pipe bend pipe
3'=L
1+ (180-θ
1) π R/180-(180-θ
1) △/90+L
2+ (180-θ
2) π R/180-(180-θ
2) △/90+L
3,
……
The length L of the inflection point then during N section copper pipe bend pipe
n'=L
1+ (180-θ
1) π R/180-(180-θ
1) △/90+L
2+ ... + (180-θ
n-1) π R/180-(180-θ
n-1) △/90+L
n,
Wherein, L
1for first paragraph length of straight pipe, L
2for second segment length of straight pipe, L
3be the 3rd section of length of straight pipe ..., L
nbe the length of N section straight tube, R is elbow radius, θ
1for first paragraph bend pipe angle, θ
2for second segment bend pipe angle, θ
3be the 3rd section of bend pipe angle ..., θ
n-1it is N-1 section bend pipe angle.
Further, described elbow radius R=2D, wherein, D is copper pipe external diameter.
After adopting such design, the present invention at least has the following advantages:
1, the die debugging before thoroughly eliminating the processing of traditional bend pipe, exemplar try curved produced material and manually waste, and the copper pipe bend pipe CB axial length difference adopting this method to obtain is little, bend pipe is simple, the degree of accuracy is high.
2, for medium-sized and small enterprises high-end devices limited investment, when, rely on existing Normal hydraulic angle pipe equipment, can reach shaping accurately and reliably, reduce operating personnel skill set requirements, realize the object produced in enormous quantities
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solution of the present invention, and in order to better understand technological means of the present invention, below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail.
Fig. 1 is the structural representation of existing copper pipe bend pipe mode.
Fig. 2 is the schematic diagram after the bend pipe of existing copper pipe bend pipe mode.
Fig. 3 is the schematic diagram of copper pipe bend pipe.
Wherein, 1 is copper pipe, and 2 is multi-stage loose-core, and 3 is bending die, and 4 is clamp, and 5 is guide plate.
In figure, A to B section is first paragraph straight tube, and B to C section is first paragraph bend pipe, and C to D section is second segment straight tube, D to E section is second segment bend pipe, and E to F section is the 3rd section of straight tube, and F to G section is the 3rd section of bend pipe, G to H section is S tetra-sections of straight tubes, and H to I section is the 4th section of bend pipe, and I to J section is the 5th section of straight tube.
Detailed description of the invention
Elbow radius is determined by equipment die, it is known quantity, namely equipment manufacturer designs and produces mould by this value, the value principle of this value generally proposes according to the designing requirement of system pipeline the copper pipe road clod wash ability that also bonding apparatus producer Mold Making technology can meet by user and determines, for ensureing standardization and design specification degree, elbow radius is generally adopted to design and produce mould by 2 times, 2.5 times, 3 times of copper pipe external diameter in current industry, get elbow radius R=2D in the present embodiment, wherein D is copper pipe external diameter.
With reference to shown in Fig. 3, the invention provides a kind of computational methods of thin-wall copper pipe blanking bend tube, comprise the following steps: first, choose each three of the copper pipe that length is 1000mm different tube diameters specification, bending machine plays curved 90 degree from pipe end 500mm place, elbow radius is 2D, the length L of copper pipe after going out actual forming elbow along the central line measurement of bend pipe, the mean value L of the physical length after the copper pipe calculating each specification bends
all, so, bend pipe elongation △=L
all-1000mm.
Measurement data is as shown in the table:
Table 1
Then when bend pipe angle is θ, the bend pipe elongation △ of copper pipe
θ=(180-θ) △/90,
With reference to shown in Fig. 3, in the present embodiment, be provided with four bend pipes, from figure A end as starting point.
The length L of the inflection point B point then during first paragraph copper pipe bend pipe
1'=L
1,
The length L of inflection point D point during second segment copper pipe bend pipe
2'=L
1+ (180-θ
1) π D/90-(180-θ
1) △/90+L
2,
The length L of inflection point F point during the 3rd section of copper pipe bend pipe
3'=L
1+ (180-θ
1) π D/90-(180-θ
1) △/90+L
2+ (180-θ
2) π D/90-(180-θ
2) △/90+L
3,
The length L of inflection point during the 4th section of copper pipe bend pipe
4'=L
1+ (180-θ
1) π D/90-(180-θ
1) △/90+L
2+ (180-θ
2) π D/90-(180-θ
2) △/90+L
3+ (180-θ
3) π D/90-(180-θ
3) △/90+L
4,
The length L of the total blanking of J point
5'=L
1+ (180-θ
1) π D/90-(180-θ
1) △/90+L
2+ (180-θ
2) π D/90-(180-θ
2) △/90+L
3+ (180-θ
3) π D/90-(180-θ
3) △/90+L
4+ (180-θ
4) π D/90-(180-θ
4) △/90+L
5,
Wherein, L
1for first paragraph length of straight pipe, L
2for second segment length of straight pipe, L
3be the 3rd section of length of straight pipe, L
4be the 4th section of length of straight pipe, L
5be the length of the 5th section of straight tube, D is copper pipe external diameter, θ
1for first paragraph bend pipe angle, θ
2for second segment bend pipe angle, θ
3be the 3rd section of bend pipe angle, θ
4be the 4th section of bend pipe angle.
Due in copper pipe BENDING PROCESS, outer rim tension and inner circle compression make a concerted effort all to middle part effect, cause tube bending position diameter in the horizontal plane to reduce, the diameter on vertical plane increases, occur oval, there will be angle when end face does not thoroughly depart from crooked position simultaneously.Therefore, for the length L of the straight-tube portion between final stage straight length and continuous each bend pipe
nl should be met
n>=clamp effective length, this effective length is determined according to mold cramping block, generally answers according to the form below to perform.
Table 2
The above; it is only preferred embodiment of the present invention; not do any pro forma restriction to the present invention, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection scope of the present invention.
Claims (2)
1. computational methods for thin-wall copper pipe blanking bend tube, is characterized in that, comprise the following steps:
First, get equal length, the copper pipe of different size severally curvedly on bending machine gets certain angle, if the initial length of copper pipe is L
0, elbow radius is R, the length L of copper pipe after going out actual forming elbow along the central line measurement of bend pipe, calculate every in the copper pipe of specification bend after the mean value L of physical length
all, so, bend pipe elongation △=L
all-L
0, then when bend pipe angle is θ, the bend pipe elongation △ of copper pipe
θ=(180-θ) △/90,
The length L of the inflection point then during first paragraph copper pipe bend pipe
1'=L
1,
The length L of inflection point during second segment copper pipe bend pipe
2'=L
1+ (180-θ
1) π R/180-(180-θ
1) △/90+L
2,
The length L of inflection point during the 3rd section of copper pipe bend pipe
3'=L
1+ (180-θ
1) π R/180-(180-θ
1) △/90+L
2+ (180-θ
2) π R/180-(180-θ
2) △/90+L
3,
······
The length L of the inflection point then during N section copper pipe bend pipe
n'=L
1+ (180-θ
1) π R/180-(180-θ
1) △/90+L
2++ (180-θ
n-1) π R/180-(180-θ
n-1) △/90+L
n,
Wherein, L
1for first paragraph length of straight pipe, L
2for second segment length of straight pipe, L
3be the 3rd section of length of straight pipe, L
nbe the length of N section straight tube, R is elbow radius, θ
1for first paragraph bend pipe angle, θ
2for second segment bend pipe angle, θ
3be the 3rd section of bend pipe angle, θ
n-1it is N-1 section bend pipe angle.
2. computational methods for thin-wall copper pipe blanking bend tube according to claim 1, is characterized in that, described elbow radius R=2D, and wherein, D is copper pipe external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410615902.6A CN104525659B (en) | 2014-11-05 | A kind of computational methods of thin-wall copper pipe blanking bend tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410615902.6A CN104525659B (en) | 2014-11-05 | A kind of computational methods of thin-wall copper pipe blanking bend tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104525659A true CN104525659A (en) | 2015-04-22 |
| CN104525659B CN104525659B (en) | 2017-01-04 |
Family
ID=
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004313A (en) * | 2015-07-02 | 2015-10-28 | 广船国际有限公司 | Measuring method for pipe bending extension quantities |
| CN105528331A (en) * | 2015-12-17 | 2016-04-27 | 东方电气集团东方汽轮机有限公司 | Method for determining blanking size of elbow based on excel system |
| CN106270059A (en) * | 2016-11-08 | 2017-01-04 | 南京航空航天大学 | A kind of metal complex component 3D free bend forming technology optimization method |
| CN107008787A (en) * | 2017-04-14 | 2017-08-04 | 南京航空航天大学 | A kind of free bend manufacturing process of spiral 3 D complex bool |
| CN109201934A (en) * | 2018-11-12 | 2019-01-15 | 广州小出钢管有限公司 | A kind of processing method of automotive seat numerical controlled bending of pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04237520A (en) * | 1991-01-14 | 1992-08-26 | Daido Steel Co Ltd | Manufacture of ring plate and device therefor |
| CN101879542A (en) * | 2009-05-06 | 2010-11-10 | Cml国际有限公司 | A kind of machine with predetermined radii continuous bend farm labourer part |
| CN102941267A (en) * | 2012-10-17 | 2013-02-27 | 青岛宏奥铜管有限公司 | Process for manufacturing spring-type copper tube |
| CN203124508U (en) * | 2013-02-26 | 2013-08-14 | 中山市奥翔机械有限公司 | Restraining part, restraining mechanism and S-shaped pipe bender |
| CN103934335A (en) * | 2014-04-14 | 2014-07-23 | 陈坷忠 | Linear type heating furnace tube bending technology |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04237520A (en) * | 1991-01-14 | 1992-08-26 | Daido Steel Co Ltd | Manufacture of ring plate and device therefor |
| CN101879542A (en) * | 2009-05-06 | 2010-11-10 | Cml国际有限公司 | A kind of machine with predetermined radii continuous bend farm labourer part |
| CN102941267A (en) * | 2012-10-17 | 2013-02-27 | 青岛宏奥铜管有限公司 | Process for manufacturing spring-type copper tube |
| CN203124508U (en) * | 2013-02-26 | 2013-08-14 | 中山市奥翔机械有限公司 | Restraining part, restraining mechanism and S-shaped pipe bender |
| CN103934335A (en) * | 2014-04-14 | 2014-07-23 | 陈坷忠 | Linear type heating furnace tube bending technology |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004313A (en) * | 2015-07-02 | 2015-10-28 | 广船国际有限公司 | Measuring method for pipe bending extension quantities |
| CN105528331A (en) * | 2015-12-17 | 2016-04-27 | 东方电气集团东方汽轮机有限公司 | Method for determining blanking size of elbow based on excel system |
| CN105528331B (en) * | 2015-12-17 | 2018-05-22 | 东方电气集团东方汽轮机有限公司 | The method that blanking bend tube size is determined based on excel systems |
| CN106270059A (en) * | 2016-11-08 | 2017-01-04 | 南京航空航天大学 | A kind of metal complex component 3D free bend forming technology optimization method |
| CN107008787A (en) * | 2017-04-14 | 2017-08-04 | 南京航空航天大学 | A kind of free bend manufacturing process of spiral 3 D complex bool |
| CN107008787B (en) * | 2017-04-14 | 2018-10-30 | 南京航空航天大学 | A kind of free bend manufacturing process of spiral 3 D complex bool |
| CN109201934A (en) * | 2018-11-12 | 2019-01-15 | 广州小出钢管有限公司 | A kind of processing method of automotive seat numerical controlled bending of pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103752666A (en) | Bending method of pipes with flexible chained-ball mandrel | |
| CN105855344A (en) | Forming method for small-radius bent pipes | |
| CN101791645B (en) | Stepwise arch rib forming process of large-span spacing steel pipe arch | |
| CN104889182B (en) | A kind of external mold of rectangle steel tubes inequilateral lining core mould | |
| CN104525659A (en) | Calculating method for feeding of thin-walled bent copper pipes | |
| CN207205010U (en) | A kind of sliceable bending die | |
| CN106040809A (en) | Metal plate arc bending forming method | |
| CN103484642B (en) | Method for researching influence of tubulation deformation on hydrogen induced cracking (HIC) performances of pipeline steel | |
| CN109940059A (en) | A kind of preparation method of precise thin-wall large-diameter aluminium alloy pipe | |
| CN205183360U (en) | Arc channels into tube drawing mould | |
| CN105290129A (en) | Tapered lead-in tube drawing mold | |
| CN104525659B (en) | A kind of computational methods of thin-wall copper pipe blanking bend tube | |
| CN105312344A (en) | Regular hexagon drawing die | |
| CN101428310B (en) | Flexible core of flexible tube terminal mould | |
| CN206104619U (en) | Can debug multicell mould that directly bends of colding pressing | |
| CN111069445A (en) | Wall thickness control method for expanding and drawing copper pipe | |
| CN107718509A (en) | A kind of cooler-shaper for pipeline | |
| CN105312343A (en) | Calendering die for square special pipe | |
| CN202910162U (en) | Bent pipe forming die | |
| CN209476972U (en) | A kind of Double metal composite heat exchanging pipe forming apparatus | |
| CN110883153A (en) | Composite flexible bending forming method for pipe | |
| CN207872797U (en) | A kind of pipe bender die | |
| CN107931550A (en) | A kind of copper and copper alloy tube stretching graphite jig | |
| CN211161504U (en) | Bent pipe forming die | |
| CN207138659U (en) | A kind of mould of the seamless double bend one pipe fitting processing of high-temperature and pressure pipeline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 264000 Shandong city of Yantai province Laishan dunham-bush Road Economic Development Zone No. 1 Patentee after: Don Han Bush (China) Industrial Co., Ltd. Address before: 264000 Shandong city of Yantai province Laishan dunham-bush Road Economic Development Zone No. 1 Patentee before: DUNHAM-BUSH YANTAI CO., LTD. |