CN1359778A - Piezoelectric-type ultrasonic impacter for improving fatigue performance of welded joint - Google Patents
Piezoelectric-type ultrasonic impacter for improving fatigue performance of welded joint Download PDFInfo
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- CN1359778A CN1359778A CN 02100037 CN02100037A CN1359778A CN 1359778 A CN1359778 A CN 1359778A CN 02100037 CN02100037 CN 02100037 CN 02100037 A CN02100037 A CN 02100037A CN 1359778 A CN1359778 A CN 1359778A
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Abstract
A piezoelectric ultrasonic impactor for improving the fatigue performance of welded point is composed of ultrasonic power generator, piezoelectric vibrator, amplitude change rod linked to said vibrator, and casing with cover and handle. Said ultrasonic power generator is connected with single-phase power supply and a piezoelectric ultrasonic impacting gun which has an impacting head having more than 3 impacting holes and impacting needles in said holes. Its advantages are small size, light weight, high efficiency improved by 200-300%, and high effect on improving fatigue strength by 20-200% and fatigue life by 3-400 times.
Description
Technical field
The invention belongs to the welding equipment class, relate in particular to the device that fatigue properties of welded joints is handled.
Background technology
In the process of metal working, metal solder is a kind of processing technology commonly used in the process.Metal material is pressed shape, size after welding, because the stress of toe of weld is concentrated the effect that reaches factors such as residual-tensile stress, usually the fatigue behaviour of welding point is far below base metal, the normal crack initiation of solder joint fatigue crackle is in welding toe of joint, cause thus taking place often, bring some serious loss and influences for people's aspects such as personal safety, work, travelling, life, property as large welded structures spare accidents such as offshore oil production platform, bridge, rolling stock, boats and ships, aircrafts.Therefore, improve the difficult problem that the fatigue strength of welding point has become people will solve for a long time.Usually people usually adopt hammering method, moltenly amend the law, the shot-peening method waits the fatigue behaviour that improves welding point and structure, but aspects such as its efficient, effect and the scope of application all exist many shortcomings and problem.Recently people adopt magnetostriction type ultrasonic impact device to come toe of weld is handled, with the fatigue strength that improves welding point, prolong its service life.But because the loss of magnetostriction type ultrasonic impact device is bigger, efficient can only reach about 30%; Be easy to heating during operation, need water, wet goods liquid to cool off etc.; And the product cost is very high, and volume and weight is also bigger, inconvenient operation, thereby be unfavorable in various workplaces, promoting, use and operating.
Summary of the invention
The purpose of this invention is to provide a kind of piezoelectric-type ultrasonic impact device that improves fatigue properties of welded joints, to solve an above-mentioned difficult problem.
Purpose of the present invention realizes like this: a kind of piezoelectric-type ultrasonic impact device that improves fatigue properties of welded joints is made of ultrasonic power generator, piezoelectric vibrator, luffing bar, shell.The present invention is arranged on the ultrasonic power generator in the casing, and the one end is connected with the single phase poaer supply terminals, and the other end is connected to piezoelectric-type ultrasonic impact gun by cable.Piezoelectric vibrator is connected in the shell that is placed on piezoelectric-type ultrasonic impact gun by connector with the luffing bar.One end of shell and luffing bar is provided with lid.The other end of lid is equipped with the impact head, and the end of impact head is provided with the impact pin hole more than 3, impacts pin hole and is built-in with striker pin.
Because the present invention has adopted above technical scheme, in actual field work, directly uses product of the present invention that welding point is carried out ultrasonic impact, can significantly improve the fatigue behaviour of toe of weld; And has power consumption less, the characteristics that power output is big.Through practical operation and contrast, the present invention compares with similar magnetostriction type ultrasonic impact device, under identical operating frequency, the volume of ultrasonic impact gun reduces 300～600%, weight saving 40～100%, efficient improves 200～300%, and the fatigue strength of welding point and structure improves 20～200%, prolongs 3～400 times fatigue life.And have liquid cools such as not needing water in operation, make things convenient for characteristics such as hand-held, thereby fabulous practical value and economic benefit are arranged.
Description of drawings
Fig. 1 is a kind of piezoelectric-type ultrasonic impact schematic representation of apparatus that improves fatigue properties of welded joints of the present invention.
Fig. 2 is the structural representation of the piezoelectric-type ultrasonic impact gun in a kind of piezoelectric-type ultrasonic impact device that improves fatigue properties of welded joints of the present invention.
Among the figure; 1, casing 1-1, single-phase end of incoming cables 1-2, output 2, supersonic generator 3, cable 4, piezoelectric supersonic impact gun 4-1, screw 4-2, connector 4-3, shell 5, piezoelectric vibrator 5-1 piezoelectric ceramic piece 5-2, connector 6, luffing bar 6-1, protrude step 7, back-up ring 8, elastic component 9, lid 10, impact a 10-1, screw 11, striker pin 12, end of incoming cables 13, handle 13-1, adjustable handle 14, strip end face 15, arc-shaped curved surface
Embodiment is explained as follows enforcement of the present invention below in conjunction with accompanying drawing:
In Fig. 1, casing 1 can be set to horizontal or vertical, general small-sized place or mobile building site with the former for well.Can be shaped on handle and wheel disc on the casing 1.An end is provided with the single-phase end of incoming cables 1-1 of 220V on the casing 1, adopts the single phase poaer supply inlet wire, and it compares the field of employment with three-phase power line more, more flexible, is more convenient in small-sized indoor place or the use of field work building site.Be provided with several layers of screen work in the casing 1, be equipped with controlled rectifier in the supersonic generator 2, inverter, control circuit, coupling output circuit etc. respectively and be linked in sequence by lead.Also be provided with output 1-2 on the casing 1.Cable 3 is connected with the end of incoming cables 12 of output 1-2 and piezoelectric supersonic impulsion rifle 4 respectively.It can adopt normal power cord, also can adopt coaxial cable, generally with the latter for well.
In Fig. 2, the shell 4-3 of piezoelectric supersonic impulsion rifle 4 can be made into cylindrical shell shape or other shape.Be shaped on handle 13 on the shell 4-3.Convenient for bimanualness, can be provided with the adjustable handle 13-1 that regulates direction at the front end of shell 4-3.The lower end of handle 13 is provided with power inleting terminal 12, and power inleting terminal 12 places have lead to be connected to piezoelectric vibrator 5.Handle 13 places can be provided with gauge tap, directly control when being convenient to operate.
Piezoelectric vibrator 5 is provided with screwed hole with luffing bar 6 faces of combining, and is connected by screw-type connector 5-2 in the shell 4-3 that is placed on piezoelectric supersonic impulsion rifle 4; Shell 4-3 goes up and the fastening piezoelectric vibrator 5 of screw 5-1 is arranged.Piezoelectric vibrator 5 can adopt the higher multi-disc piezoelectric ceramics 5-1 of efficient, constitutes the ceramic-type piezoelectric vibrator after fastening combination.
The rearward end of luffing bar 6 is set to cylindrical, and its diameter can be 40～80 millimeters.The other end of luffing bar 6 is set to strip end face 14, the length of strip end face 14 on joining striker pin 11 quantity, diameter decide, when being 4～6 pins, be about about 5～8 millimeters of 20～30 millimeters, thickness.Structure between the cylindrical and strip end face 14 of luffing bar 6 can be set to identical mutually shaped form, so that reduce the vibration impedance of luffing bar 6 and improve stability of vibration.The leading section strip two sides of luffing bar 6 are set to bent arc 15, are beneficial on the one hand with the cylindrical straight diametal curve to coincide, and prevent that the shaft of luffing bar 6 from rupturing herein; On the other hand, be easy to acoustic vibration, and amplitude is more stable, impact capacity can significantly increase, and the ultrasonic impact treatment effect is better.Be economy, the easy needs of aspect such as manufacturing, luffing bar 6 can adopt general tool steel or titanium alloy steel to make, and after heat treatment, hardness reaches HRC50～65 for well.
Luffing bar 6 is provided with and protrudes step 6-1, and a side of protrusion step 6 one 1 or two side faces are provided with elastic component 8 and back-up ring 7 and place in the shell 4-3, can play significant damping and sound insulation effect.Elastic component 8 can adopt rubber ring, and back-up ring 7 can adopt ordinary metallic material such as aluminium alloy to make.
The shell 4-3 of piezoelectric supersonic impact gun 4 and an end of luffing bar 6 are provided with lid 9.Lid 9 can be set to circle, also can be made as lower-circle-square-shape; When for the former and the latter, lid 9 can adopt the screw-type of connector 4-2 to be connected with the shell 4-3 of piezoelectric supersonic impact gun 16.The other end of lid 9 is provided with impacts 10.Impact 10 can be set to circular or square; When for the former, impact 10 and can directly adopt the screw-type connector to be fastenedly connected with lid 9; When being the latter, impacting 10 and can on square rim, be shaped on connecting hole with lid 9 and adopt screw 10-1 to be fastenedly connected.Impact an other end of 10 and can be set to strip end face 14, be shaped on it more than 3 (as 4,5,6,8 ...) the impact pin hole; Arrange but impact the pin hole in-line, also can double arranged side by side or other arrangement shape.Impact pin hole and be built-in with striker pin 11.Striker pin 11 is to implement welding point is carried out the workpiece of shock treatment, and its outer face should be made as circular-arc for well; It places sides in the lid 9 should be set to tapering end greater than the bar footpath, to guarantee that striker pin is packed into and not drop out when impacting work.
Impact its inner end of impact pin hole that is provided with on 10 and be provided with tapering or the chamfering that the tapering end with striker pin 11 matches, with guarantee that striker pin is packed into and the shock treatment process in come and go unobstructed not interlock.
The present invention is in real work, after feeding single phase poaer supply by supply terminals 1-1, piezoelectric vibrator produces ultrasonic vibration, through luffing bar 6 Oscillation Amplitude is amplified, obtaining a frequency is that 16～30KHZ, output amplitude are the supersonic shock wave about 15～50 microns, and the toe of weld that promotes 11 pairs of metal works welding positions of striker pin carries out shock treatment.Practice shows, after the present invention imposes ultrasonic impact, the fatigue strength that can significantly improve welding point reaches 20～200%, and electromechanical conversion efficiency is stretched formula ultrasonic impact device than mangneto and improved 200～300%, thereby can obtain excellent economic and social benefit in real work.
Claims (6)
1. piezoelectric-type ultrasonic impact device that improves fatigue properties of welded joints, constitute by ultrasonic power generator, piezoelectric vibrator, luffing bar, shell, it is characterized in that, the ultrasonic power generator is arranged in the casing, the one end is connected with the single phase poaer supply terminals, and the other end is connected to piezoelectric-type ultrasonic impact gun by cable; Piezoelectric vibrator is connected in the shell that is placed on piezoelectric-type ultrasonic impact gun with the luffing bar by connector; One end of shell and luffing bar is provided with lid, and the other end of lid is equipped with the impact head; The end of impact head is provided with the impact pin hole more than 3, impacts pin hole and is built-in with striker pin.
2. a kind of piezoelectric-type ultrasonic impact device that improves fatigue properties of welded joints according to claim 1 is characterized in that, the piezoelectric vibrator that is provided with in the shell is constituted by the multi-disc piezoelectric ceramics.
3. according to the described a kind of piezoelectric-type ultrasonic impact device that improves fatigue properties of welded joints of claim 1, it is characterized in that the luffing bar is provided with the protrusion step.
4. a kind of piezoelectric-type ultrasonic impact device that improves fatigue properties of welded joints according to claim 1 is characterized in that, the side that luffing bar epirelief goes out step is provided with elastic component and back-up ring and places in the shell.
5. a kind of piezoelectric-type ultrasonic impact device that improves fatigue properties of welded joints according to claim 1 is characterized in that, the outer end of impacting head is set to strip, and the strip end face is provided with 4～8 and impacts pin hole.
6. a kind of piezoelectric-type ultrasonic impact device that improves fatigue properties of welded joints according to claim 1 is characterized in that shell is provided with the hand held handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02100037 CN1359778A (en) | 2002-01-09 | 2002-01-09 | Piezoelectric-type ultrasonic impacter for improving fatigue performance of welded joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02100037 CN1359778A (en) | 2002-01-09 | 2002-01-09 | Piezoelectric-type ultrasonic impacter for improving fatigue performance of welded joint |
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| CN1359778A true CN1359778A (en) | 2002-07-24 |
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| CN 02100037 Pending CN1359778A (en) | 2002-01-09 | 2002-01-09 | Piezoelectric-type ultrasonic impacter for improving fatigue performance of welded joint |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101340985B (en) * | 2005-12-23 | 2011-01-12 | 海尔曼超声波技术有限公司 | Device for the ultrasonic processing of a workpiece |
| CN103264356A (en) * | 2013-05-27 | 2013-08-28 | 天津天东恒科技发展有限公司 | Multi-needle type impacting head for ultrasonic impacting gun and design method of impacting head |
| CN102112268B (en) * | 2008-07-28 | 2014-06-25 | 新日铁住金株式会社 | Peening method for improving fatigue characteristics of welded joint, peening apparatus for improving fatigue characteristics, and welded structure having excellent anti-fatigue characteristics |
| CN107009019A (en) * | 2017-03-31 | 2017-08-04 | 安徽鹭江电子工业制造有限公司 | A kind of hand-hold ultrasonic welds rifle |
| CN109420988A (en) * | 2017-09-05 | 2019-03-05 | 天津大学 | Full angle flexibility pin type ultrasonic shot peening device |
| CN109706308A (en) * | 2017-12-26 | 2019-05-03 | 南通大学 | Intelligent after welding treatment equipment |
| CN114107632A (en) * | 2021-12-11 | 2022-03-01 | 李军 | Welding bead residual stress relieving device and method |
-
2002
- 2002-01-09 CN CN 02100037 patent/CN1359778A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101340985B (en) * | 2005-12-23 | 2011-01-12 | 海尔曼超声波技术有限公司 | Device for the ultrasonic processing of a workpiece |
| CN102112268B (en) * | 2008-07-28 | 2014-06-25 | 新日铁住金株式会社 | Peening method for improving fatigue characteristics of welded joint, peening apparatus for improving fatigue characteristics, and welded structure having excellent anti-fatigue characteristics |
| CN103264356A (en) * | 2013-05-27 | 2013-08-28 | 天津天东恒科技发展有限公司 | Multi-needle type impacting head for ultrasonic impacting gun and design method of impacting head |
| CN104802096A (en) * | 2013-05-27 | 2015-07-29 | 天津天东恒科技发展有限公司 | Method for designing multi-pin peening head for ultrasonic peening gun |
| CN103264356B (en) * | 2013-05-27 | 2015-12-02 | 天津天东恒科技发展有限公司 | A kind of multi-needle impact head for ultrasonic impact gun and method for designing thereof |
| CN104802096B (en) * | 2013-05-27 | 2017-04-05 | 天津天东恒科技发展有限公司 | A kind of method for designing of multi-needle impact head for ultrasonic impact gun |
| CN107009019A (en) * | 2017-03-31 | 2017-08-04 | 安徽鹭江电子工业制造有限公司 | A kind of hand-hold ultrasonic welds rifle |
| CN109420988A (en) * | 2017-09-05 | 2019-03-05 | 天津大学 | Full angle flexibility pin type ultrasonic shot peening device |
| CN109706308A (en) * | 2017-12-26 | 2019-05-03 | 南通大学 | Intelligent after welding treatment equipment |
| CN109797276A (en) * | 2017-12-26 | 2019-05-24 | 南通大学 | Postwelding weld impingement method based on image procossing |
| CN109797276B (en) * | 2017-12-26 | 2020-09-01 | 南通大学 | Postweld seam impact method based on image processing |
| CN114107632A (en) * | 2021-12-11 | 2022-03-01 | 李军 | Welding bead residual stress relieving device and method |
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