CN106984671A - A kind of device and method for measuring bend pipe processing extension and resilience - Google Patents
A kind of device and method for measuring bend pipe processing extension and resilience Download PDFInfo
- Publication number
- CN106984671A CN106984671A CN201710340641.5A CN201710340641A CN106984671A CN 106984671 A CN106984671 A CN 106984671A CN 201710340641 A CN201710340641 A CN 201710340641A CN 106984671 A CN106984671 A CN 106984671A
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- straight pipe
- resilience
- pipe
- extension
- drawstring
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a kind of device and method for measuring bend pipe processing extension and resilience, belong to machining and field of measuring technique.Described measurement bend pipe processing extension and the device of resilience include core bar, air bag, end cap, locating piece, fastener, trip bolt, drawstring, displacement transducer and sensor mount.Locating piece and fastener, for fixed pulling rope and are adjusted to horizontal level to detect straight pipe curved shape；In straight pipe process, airbag aeration makes drawstring laminating straight pipe inwall, detects bend pipe shape；Data Detection processing system includes displacement transducer, reads straight pipe processing, unloads the length change of drawstring inside and outside front and rear, springback angle and extension value are calculated using geometrical principle.The device of measurement bend pipe processing extension and resilience can apply the pipe fitting bending machining with the industrial circle such as shipbuilding, automobile, aviation, this have easy to carry, operation simply, the characteristics of measuring speed is fast, cost is low.
Description
Technical field
The present invention relates to a kind of device and method for measuring bend pipe processing extension and resilience, belong to machining and measurement skill
Art field.
Background technology
Bending pipe fitting is widely used in the industrial circles such as shipbuilding, automobile, aviation, and this kind of pipe fitting must use bend pipe
Machine or CNC tube bending machine carry out bending machining to be molded to straight tube material.Become because tubing can produce elastoplasticity in bending machining
Shape, the length of bending section can produce extension naturally in BENDING PROCESS, and inevitably occur resilience after bending unloading
Phenomenon.Tubular length produce elongation by cause bend pipe process after material removal when waste, and influence subsequently with bend pipe phase
The working process parameter of pass；And the resilience of angle then causes the angle of pipe fitting actual flexion to be less than predetermined angle of bend.Therefore
Extension and rebound phenomenon presence had a strong impact on bend pipe production precision and efficiency, directly influence the performance of bend pipe with
And the connection effect with miscellaneous part.
The factor of influence pipe fitting bending machining resilience extension also includes except the material of itself and dimensional parameters of straight pipe
The working process parameter of bending machine, resilience extension phase not to the utmost when causing the pipe fitting of different batches to be processed on different bending machines
Together.It is general during processing particular batch pipe fitting at present that springback angle and extension value are obtained using trial-and-error method, then correct angle of bend and straight
Length of pipe section, and then realize without surplus blanking, pipe fitting is approximately equal to the design load of processing.Obtain the general biography of resilience extension value
System method is hand dipping, that is, the pipe fitting after shaping is marked on bending machine and unloaded after inflection point and the curved point of tail from bending machine,
The chord length for being placed on measurement bend pipe on platform is calculated, and this method efficiency is low, and error is larger；Another method then uses three
Coordinate measuring apparatus is detected, by the profile scanning collection data to bend pipe and then the threedimensional model of reduction pipe fitting, is detected
Relevant parameter, but this method cost is high, and time-consuming.Therefore, a kind of simple and efficient, accurately and effectively measurement apparatus is developed, is
Realize the efficient key issue of bend pipe precision machining.
The content of the invention
The invention provides a kind of easy to carry, operation is simple, the Mechanical measurement bend pipe that measuring speed is fast, cost is low
Device and method.
Technical scheme：
A kind of device for measuring bend pipe processing extension and resilience, including core bar 1, air bag 2, end cap 3, locating piece 4, fastener
5th, trip bolt 6, drawstring 7, displacement transducer 8 and sensor mount 9；
The main body for measuring the device of bend pipe processing extension and resilience is a straight pipe, and straight pipe two ends coordinate fixed by end cap
Position block is fixed；Adherent be provided with after two drawstrings, airbag aeration of the inwall of straight pipe makes drawstring be close to straight pipe inwall, the one of drawstring
End is fixed on one end of straight pipe, the displacement transducer of the other end of other end connection straight pipe by locating piece；
Two displacement transducers are located at balloon side, are fixed on sensor mount, it is ensured that two displacement transducers are located at a water
On horizontal line；Sensor mount is coordinated by fastener, fixed block and trip bolt, is fixed on straight pipe end；
In core bar insertion straight pipe, core bar is club structure, and spheroid end is located in straight pipe, spheroid end and straight pipe inwall
Leave gap；The end of straight pipe is fixed at body of rod end by end cap；
Air bag is stretched into from the other end of straight pipe, during measurement, with the spheroid end in contact of core bar after airbag aeration, after inflation
Air bag is full of the crooked position of straight pipe.
A kind of method for measuring bend pipe processing extension and resilience, step is as follows：
(1) device for measuring bend pipe processing extension and resilience is installed on CNC tube bending machine, makes both sides drawstring coplanar simultaneously
Level；Under pretension effect, the reading of two displacement transducers is designated as S1And S2；
(2) CNC tube bending machine bends to straight pipe after predetermined angular, keeps stress state, reads now two displacement sensing
Device reading is designated as S respectively11And S21；
(3) the fetal membrane radius R of CNC tube bending machine, the external diameter of straight pipe is D, and wall thickness is the angle of bend of straight pipe before h, resilience
Degree is calculated as
(4) after CNC tube bending machine unloading, two displacement transducer readings are designated as S respectively12And S22, then the angle of bend after resilience
Spend and be
(5) springback angle is calculated asExtension value is Δ L=0.5* (S22-
S2+S12-S1)。
Beneficial effects of the present invention：Measurement apparatus is simple, simple to operate, cost is low, can accurately detect bend pipe shape, calculates
Time is short, with measurement accuracy it is high the characteristics of.
Brief description of the drawings
Fig. 1 is the structure chart of measurement apparatus of the present invention.
In figure：1 core bar；2 air bags；3 end caps；4 locating pieces；5 fasteners；6 trip bolts；7 drawstrings；8 displacement transducers；9
Sensor mount.
Embodiment
Below in conjunction with accompanying drawing and technical scheme, the embodiment of the present invention is further illustrated.
Before numerical controlled bending of pipe machining pipe fitting, outer diameter D, the wall thickness h of record bending machine fetal membrane radius R and pipe fitting.
As shown in figure 1, displacement transducer 8 is fixed on sensor mount 9, and it is arranged on tight by trip bolt 6
Admittedly on card 5, then one end that will be integrally fixed to straight pipe, other side carries out installation fixation according to same way, finally by
The adjustment position of locating piece 4, makes the co-planar horizontal of two displacement transducer 8.
By the drawstring 7 being connected with displacement transducer 8 through straight pipe inner side, and it is fixed on retainer plate, using as described above
Retainer plate is fixed on the other end of straight pipe by identical mode, and is adjusted by locating piece 4, makes the drawstring 7 of straight pipe inwall
Co-planar horizontal, drawstring 7 applies certain pretightning force, is allowed to be adjacent to straight pipe inwall.
The straight pipe for installing measurement apparatus is arranged on CNC tube bending machine through core bar 1, the steering of straight pipe is adjusted,
Make the co-planar horizontal of displacement transducer 8, while air bag 2 is stretched into arranged at inner side of pipe fitting, be inflated, the inserting end of air bag 2 is adjacent to core
Bar 1.
Before CNC tube bending machine bending machining straight pipe, the reading of displacement transducer is designated as S inside and outside record1And S2；Directly
During pipe fitting bending machining, the inflated condition of air bag 2 is kept, so that drawstring 7 is adjacent to straight pipe madial wall all the time.
Numerical controlled bending of pipe machining straight pipe is bent to after predetermined angular, is kept stress state, is read now interior lateral displacement
Sensor reading is designated as S respectively11And S21；The angle of bend of straight pipe is calculated as before resilience
After CNC tube bending machine unloading, interior outside displacement transducer reading is designated as S respectively12And S22, then the angle of bend after resilience
Degree is calculated as
Using measured value, calculating springback angle isExtension value is Δ L
=0.5* (S22-S2+S12-S1)。
Claims (2)
1. a kind of device for measuring bend pipe processing extension and resilience, it is characterised in that described measurement bend pipe is processed extension and returned
The device of bullet includes core bar, air bag, end cap, locating piece, fastener, trip bolt, drawstring, displacement transducer and sensor and installed
Frame；
The main body for measuring the device of bend pipe processing extension and resilience is a straight pipe, and straight pipe two ends coordinate locating piece by end cap
It is fixed；Adherent be provided with after two drawstrings, airbag aeration of the inwall of straight pipe makes drawstring be close to straight pipe inwall, and one end of drawstring leads to
Cross one end that locating piece is fixed on straight pipe, the displacement transducer of the other end of other end connection straight pipe；
Two displacement transducers are located at balloon side, are fixed on sensor mount, it is ensured that two displacement transducers are located at a horizontal line
On；Sensor mount is coordinated by fastener, fixed block and trip bolt, is fixed on straight pipe end；
In core bar insertion straight pipe, core bar is club structure, and spheroid end is located in straight pipe, and spheroid end is left with straight pipe inwall
Gap；The end of straight pipe is fixed at body of rod end by end cap；
Air bag is stretched into from the other end of straight pipe, during measurement, with the spheroid end in contact of core bar after airbag aeration, the air bag after inflation
Crooked position full of straight pipe.
2. a kind of method for measuring bend pipe processing extension and resilience, it is characterised in that step is as follows：
(1) device for measuring bend pipe processing extension and resilience is installed on CNC tube bending machine, makes both sides drawstring coplanar and level；
Under pretension effect, the reading of two displacement transducers is designated as S1And S2；
(2) CNC tube bending machine bends to straight pipe after predetermined angular, keeps stress state, reads now two displacement transducers and reads
Number is designated as S respectively11And S21；
(3) the fetal membrane radius R of CNC tube bending machine, the external diameter of straight pipe is D, and wall thickness is the angle of bend meter of straight pipe before h, resilience
It is
(4) after CNC tube bending machine unloading, two displacement transducer readings are designated as S respectively12And S22, then the angle of bend after resilience be
(5) springback angle is calculated asExtension value is Δ L=0.5* (S22-S2+
S12-S1)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710340641.5A CN106984671B (en) | 2017-05-16 | 2017-05-16 | A kind of device and method for measuring bend pipe processing and extending and springing back |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710340641.5A CN106984671B (en) | 2017-05-16 | 2017-05-16 | A kind of device and method for measuring bend pipe processing and extending and springing back |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106984671A true CN106984671A (en) | 2017-07-28 |
| CN106984671B CN106984671B (en) | 2018-09-04 |
Family
ID=59419470
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710340641.5A Expired - Fee Related CN106984671B (en) | 2017-05-16 | 2017-05-16 | A kind of device and method for measuring bend pipe processing and extending and springing back |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106984671B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109079000A (en) * | 2018-10-11 | 2018-12-25 | 浙江工业大学之江学院 | A kind of quick testing agency of Spring-back of Pipe Bending |
| CN109141788A (en) * | 2018-10-11 | 2019-01-04 | 浙江工业大学之江学院 | A kind of space bent pipe rebound device for fast detecting |
| CN111922117A (en) * | 2020-07-29 | 2020-11-13 | 许益波 | Metal punch forming forging method |
| CN116020921A (en) * | 2023-03-29 | 2023-04-28 | 山东津晨佳金属制品有限公司 | Real-time angle detection device and control method for seamless steel pipe bending machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2093540A1 (en) * | 1992-05-15 | 1993-11-16 | James R. Sabine | Device to measure and compensate for springback in tube bending operation |
| CN101480674A (en) * | 2008-01-10 | 2009-07-15 | 通用汽车环球科技运作公司 | Bending apparatus and method of bending a metal object |
| CN106055822A (en) * | 2016-06-14 | 2016-10-26 | 大连船舶重工集团有限公司 | Method for confirming accurate zero-allowance blanking length of straight pipe to obtain bent pipes |
| CN206676949U (en) * | 2017-05-16 | 2017-11-28 | 大连理工大学 | A kind of device for measuring bend pipe processing extension and resilience |
-
2017
- 2017-05-16 CN CN201710340641.5A patent/CN106984671B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2093540A1 (en) * | 1992-05-15 | 1993-11-16 | James R. Sabine | Device to measure and compensate for springback in tube bending operation |
| CN101480674A (en) * | 2008-01-10 | 2009-07-15 | 通用汽车环球科技运作公司 | Bending apparatus and method of bending a metal object |
| CN106055822A (en) * | 2016-06-14 | 2016-10-26 | 大连船舶重工集团有限公司 | Method for confirming accurate zero-allowance blanking length of straight pipe to obtain bent pipes |
| CN206676949U (en) * | 2017-05-16 | 2017-11-28 | 大连理工大学 | A kind of device for measuring bend pipe processing extension and resilience |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109079000A (en) * | 2018-10-11 | 2018-12-25 | 浙江工业大学之江学院 | A kind of quick testing agency of Spring-back of Pipe Bending |
| CN109141788A (en) * | 2018-10-11 | 2019-01-04 | 浙江工业大学之江学院 | A kind of space bent pipe rebound device for fast detecting |
| CN109079000B (en) * | 2018-10-11 | 2024-03-08 | 浙江工业大学之江学院 | Quick return bend resilience detection mechanism |
| CN109141788B (en) * | 2018-10-11 | 2024-05-07 | 浙江工业大学之江学院 | Quick detection device of space return bend resilience |
| CN111922117A (en) * | 2020-07-29 | 2020-11-13 | 许益波 | Metal punch forming forging method |
| CN111922117B (en) * | 2020-07-29 | 2024-01-30 | 浙江立濠锻压有限公司 | Metal stamping forming forging method |
| CN116020921A (en) * | 2023-03-29 | 2023-04-28 | 山东津晨佳金属制品有限公司 | Real-time angle detection device and control method for seamless steel pipe bending machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106984671B (en) | 2018-09-04 |
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