EP3107688A1 - Method for shot peening a pipe inner wall of a curved workpiece having a workpiece bore, and blasting nozzle unit and blasting chamber system therefor - Google Patents
Method for shot peening a pipe inner wall of a curved workpiece having a workpiece bore, and blasting nozzle unit and blasting chamber system thereforInfo
- Publication number
- EP3107688A1 EP3107688A1 EP15715140.8A EP15715140A EP3107688A1 EP 3107688 A1 EP3107688 A1 EP 3107688A1 EP 15715140 A EP15715140 A EP 15715140A EP 3107688 A1 EP3107688 A1 EP 3107688A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- workpiece
- blasting
- jet nozzle
- nozzle unit
- working chamber
- 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
- 238000005422 blasting Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005480 shot peening Methods 0.000 title abstract description 8
- 239000003795 chemical substances by application Substances 0.000 description 19
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
- B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
Definitions
- the invention relates to a method for solidifying blasting a pipe inner wall of a curved workpiece with a workpiece bore having the features of the preamble of claim 1 and a blasting nozzle unit having the features of the preamble of claim 7.
- a method for shot peening of tubes and a jet nozzle unit thereto are known from DE 35 27 923 A1.
- This treatment method has proven itself in principle.
- the problem here is, however, that the jet nozzle head emits the blasting agent in one direction only. It must therefore be constantly rotated in order to achieve a uniform solidification of the surface over the inner circumference. In coordination with the rotation, the feed must be made to really radiate the entire surface.
- From DE 199 22 265 B4 a further jet nozzle rotatable about its longitudinal axis is known. This is guided by a cover, which covers the clear annular gap between the jet nozzle and a pipe with a correspondingly larger diameter.
- Certain workpieces have bends, such as stabilizer tubes for chassis of road and rail vehicles, or even aircraft. Often, a three-dimensional course of the pipe is required to handle neighboring components and to be able to order the pipe in tight spaces.
- JP 2012-179 696 A discloses a jet nozzle with a flexible
- Hose which is seen in the conveying direction of the blasting agent in front of the jet nozzle with the nozzle openings.
- a blast cabin with two doors which alternately serve to close the chamber.
- On the inner door each devices for receiving workpieces are provided.
- the object of the present invention is thus to improve a method and a jet nozzle unit of the type mentioned in each case so that curved portions of a tube with a small diameter can be uniformly blasted from the inside with jet particles.
- a jet nozzle unit with the features of claim 7 represents a device suitable for carrying out the method.
- the blasting medium supply hose By guiding the blasting medium supply hose in a support element, the blasting medium supply hose can be made so small in diameter, and the associated jet nozzle head can be reduced in diameter so far that the jet nozzle head can be easily pushed through the curved portion of the workpiece bore, without jamming and without Advance to bend within the workpiece bore.
- This makes it possible to use a jet nozzle head which has distributed over its circumference a plurality of jet nozzle openings. It can be treated either larger sectors at the same time, or there are even so many nozzle openings available that the entire inner circumference is treated simultaneously.
- the jet nozzle head then only has to be pushed back or forth by means of its blasting agent supply hose and the possibly subsequent blasting agent supply pipe.
- the jet nozzle head is passed through a bore or through an otherwise shaped, internal channel in the workpiece. This does not have to be circular.
- the incircle diameter is relatively small, so that it can not be processed by shot peening with conventional methods and devices. can be.
- it is big enough to accommodate a small blasting head.
- a certain air gap width between the jet head and the inner wall must be against, so that the abrasive can escape and be directed at a sufficiently high speed on the wall in order to achieve the desired solidification effect can.
- the shot Peening treatment at an in-diameter of the workpiece bore of one inch (about 25 mm) and less.
- the smallest incircle diameter to be machined by the method according to the invention is about 12 mm to 16 mm
- a jet nozzle head with a length of only about 12 mm is provided.
- a hydraulic, pneumatic or motor drive for the support element is indeed possible.
- a feed unit between the support element and the bearing element which is formed simply by a spring, in particular a compression spring.
- the workpiece is then guided to the end of the support member and moves this back slightly relative to the bearing element.
- the spring is tensioned and generates a constant pressure force. After removing the workpiece, the spring pushes the support tube back to the starting position.
- Figure 1 is a jet nozzle unit in working position in section.
- Fig. 2 is a jet nozzle unit in loading position in section
- Fig. 3 is a jet nozzle unit in working position in enlarged
- Fig. 4 is a working chamber in loading position in perspective view
- Fig. 5 is a working chamber in working position in a perspective view.
- FIG. 1 shows on the right a workpiece 200, such as a stabilizer element of a motor vehicle chassis in the region of a bend 202. It has at least one inner bore 201.
- a jet nozzle unit 100 is shown in section in FIG. 1, which comprises the following essential components:
- a moving unit 50 for displacing the blasting medium supply hose 10 and the blasting nozzle head 20 with respect to the workpiece 200 to be machined.
- the blast media feed hose 10 is connected rearwardly to a rigid blast media feed tube 12. This in turn ends in a restraint in the movement unit 50 and ends there with a suitable connection piece 13, to which a conventional blasting medium supply hose can be connected.
- the unit of blasting agent supply hose 10 and blasting medium supply pipe 12 is slidably mounted within the tubular support member 30.
- the position in FIG. 1 corresponds to the working position in which the shot peening is carried out on the inner wall of the tube bore 201 of the workpiece 200 by accelerating a suitable blasting medium, in particular small steel balls, via compressed air and exiting the jet nozzle head 20 laterally.
- the support element 30 together with the flexible blasting medium supply hose 10 mounted therein has been pushed up to the mouth of the workpiece 200 via the feed unit.
- a funnel-shaped centering element 31 is provided in order to achieve a firm and precise contact of the support element 30 to the workpiece end and to hold it during the blasting.
- the support member 30 is in turn mounted in a bearing member 40, which is also tubular in the illustrated embodiment.
- the bearing member 40 in turn may be mounted in a working chamber wall 300 so that the workpiece 200 can be shielded treated within a working chamber and escaping abrasive can be collected.
- the projecting into the working chamber end of the bearing member 40 has a bellows 43 for sealing the gap between the support member 30 and the bearing member 40th
- the slidably guided one another assemblies 20, 30, 40 have different fixed stops 34, 35, 45, over which the relative to each other possible displacement paths are limited.
- the fixed stop 35 at the end of the support member 30 is formed as a projecting shoulder on the support member 30, so that the support member 30 can be moved only relative to the bearing member 40 until the fixed stop 35 abuts the bearing member 40.
- FIG. 3 shows the blasting nozzle unit 100 according to the invention and the workpiece 200 in the same position as in FIG. 1 in an enlarged view.
- the bearing element 40 surrounds the other elements and has on its the workpiece 200 side facing the bellows 43 for shielding.
- the support member 30 is slidably mounted.
- a sliding bearing and as a seal sliding bearing elements 46, 47 are provided in the annular gap between the bearing member 40 and the support member 30.
- the left sliding bearing element 46 in FIG. 2 is fixed in the bearing element 40 by an annular disk screwed on at the end.
- the other bearing element 36 is fixed by a retaining ring on the outer circumference of the support member 30.
- the bearing element 36 also forms a fixed stop for a spring element 44, which in turn is fixed to a fixed stop 45 on the inner circumference of the bearing element 40.
- the compressed spring element 44 and the fixed stop 45 prevents the support member 30 to pull left out of the bearing element 40 out.
- the jet nozzle unit 100 thus no driven actuator is provided to make the relative movement between the bearing member 40 and the support member 30. Rather, the workpiece is moved over the spring element 44 on the support member 30 as soon as the track unit 50 no return force exerts more.
- the support element 30 is centered automatically by means of the centering element 31 at its end.
- the path of the workpiece end before the beginning of the blasting treatment can be chosen so that the workpiece 200 pushes the support member 30 slightly under compression of the spring member 44 slightly opposite the bearing member 40.
- the spring force can be maintained during the following blasting process without additional drive a largely constant pressure force.
- the spring element 44 springs back completely and brings the support member 40 in its initial position.
- the outer periphery of the jet nozzle head 12 is positioned at a distance from the workpiece inner wall. The outer circumference is thus smaller than the inner diameter of the workpiece bore 201 in the workpiece 200 to be machined, and so much smaller that an air gap remains between them, which allows the support member 15 to move back and forth without this within the workpiece bore 201 jammed.
- the blasting agent supply hose 10 with the blasting head 20 has a small diameter, so that it can be guided in the workpiece bore 201 without jamming and that it is guided by the support member 30 at the beginning of the blasting and then increasingly by the workpiece itself.
- the length of the blasting medium supply hose 10 is also chosen only so that it can be advanced to the end of the workpiece bore 201, as shown in Figures 1 and 3. This buckling of the blasting agent supply tube 10 is effectively prevented.
- the rigid blasting agent supply pipe 12 which is also guided in the support member 30 and freely emerges from behind.
- the support tube 12 has at least one annular centering element 13, which can also form a fixed stop element at the same time, which rests against a fixed stop element 34 on the inside of the support element 30 at the end of the intended return path.
- the centering element 31 on the support element 30 it can be seen in FIG. 3 that it is formed such that the workpiece end 203 lies at the end of the funnel-shaped section in a recess whose shape and size coincide exactly with the outer circumference of the workpiece end 203.
- the workpiece bore merges flush into the bore in the centering element 30, wherein flush in the sense of the invention not only the seamless transition at the same inner diameters but also a continuous, offset-free transition with conical transitions referred to.
- the purpose is to avoid diameter jumps, which could get stuck in particular during the retraction movement of the jet nozzle head.
- FIG. 4 shows parts of a working chamber system 300 with a working chamber 310 with a working chamber opening 313. Also visible is a user console. Not shown are the sake of clarity known assemblies for the supply of the abrasive to the jet nozzle unit and for the extraction of the blasting agent and the dust from the working chamber and for the preparation of the blasting agent for the purpose of reintroduction of the blasting agent in a closed circuit
- a workpiece 200 is used in a loading position.
- a jet nozzle unit 100 is arranged, which provides a common bearing element 40 for four support elements 30 with blasting medium supply hose 10 and jet nozzle head 20.
- the ends of the support elements 30 point in the direction of the working chamber opening 313.
- the blasting medium supply hoses 10 have been pulled back as far as the support element 30, as shown in FIG.
- the jet nozzle head 20 is completely within the support member 30. This is achieved by a movement of the track 50.
- the centering funnel 31 is now completely free.
- the workpiece end 203 is now moved toward the centering funnel 31. This happens in the final phase of the closure of one of the doors 31 1, 312 on the working chamber 310.
- the moving unit 50 is moved toward the bearing element 40 and the support element 30.
- the associated abrasive supply tube 12 advances the abrasive supply tube 10 and the jet nozzle head 20.
- we introduce the blasting medium and the treatment begins.
- the blasting is initiated by conveying a blasting medium through the blasting agent supply hose 10 to the blasting nozzle head 12 by means of compressed air. Large quantities of the blasting medium are accelerated and impinge on the tube inner wall. For example, an air pressure of 5 to 6 bar is used in order to achieve a flow of abrasive of about 1 kg / min.
- blasting agent supply tube 12 and the blasting agent supply hose 10 are then advanced at a constant speed over the movement unit 50 until the blasting nozzle head 20 has reached the positions shown in FIGS. 1 and 3. because shown end position at the other end of the workpiece 200 has reached. Thereafter, the withdrawal of the jet nozzle head 20 begins. In this case, blasting agent can continue to be emitted in order to improve the treatment effect.
- the blasting agent supply is interrupted and the jet nozzle head 20 is withdrawn as far as shown in FIG.
- the workpiece 20 moves away from the support tube 30, which is moved back by the spring 44 to its original position.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Coating Apparatus (AREA)
- Spray Control Apparatus (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Automatic Assembly (AREA)
- Nozzles (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL15715140T PL3107688T3 (en) | 2014-02-19 | 2015-02-19 | Method for shot peening a pipe inner wall of a curved workpiece having a workpiece bore, and blasting nozzle unit and blasting chamber system therefor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014102147.9A DE102014102147B4 (en) | 2014-02-19 | 2014-02-19 | A method of solidifying blasting a pipe inner wall of a curved workpiece with a workpiece bore and jet nozzle unit and working chamber system therefor |
PCT/DE2015/100068 WO2015124147A1 (en) | 2014-02-19 | 2015-02-19 | Method for shot peening a pipe inner wall of a curved workpiece having a workpiece bore, and blasting nozzle unit and blasting chamber system therefor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3107688A1 true EP3107688A1 (en) | 2016-12-28 |
EP3107688B1 EP3107688B1 (en) | 2020-05-06 |
Family
ID=52823408
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15715140.8A Active EP3107688B1 (en) | 2014-02-19 | 2015-02-19 | Method for shot peening a pipe inner wall of a curved workpiece having a workpiece bore, and blasting nozzle unit and blasting chamber system therefor |
Country Status (10)
Country | Link |
---|---|
US (1) | US11059146B2 (en) |
EP (1) | EP3107688B1 (en) |
CN (1) | CN106102999B (en) |
DE (1) | DE102014102147B4 (en) |
ES (1) | ES2809492T3 (en) |
HU (1) | HUE050262T2 (en) |
MX (1) | MX369918B (en) |
PL (1) | PL3107688T3 (en) |
RU (1) | RU2690555C2 (en) |
WO (1) | WO2015124147A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014102147B4 (en) * | 2014-02-19 | 2017-03-09 | Wheelabrator Group Gmbh | A method of solidifying blasting a pipe inner wall of a curved workpiece with a workpiece bore and jet nozzle unit and working chamber system therefor |
JP6798145B2 (en) * | 2016-05-23 | 2020-12-09 | 中国電力株式会社 | Cleaning tool for vertical mill |
CN107617981B (en) * | 2017-10-11 | 2019-03-01 | 中国航发北京航空材料研究院 | A kind of spray gun and intensifying method of shot peening strengthening big L/D ratio blind hole |
JP7211093B2 (en) * | 2019-01-17 | 2023-01-24 | 新東工業株式会社 | Casting sand removal method and device |
CN110666702B (en) * | 2019-11-14 | 2021-06-22 | 佛山市泓天金属制品有限公司 | Shot peening treatment device for metal surface |
CN110802523B (en) * | 2019-11-14 | 2021-08-31 | 常州优越喷丸加工有限公司 | Shot peening method for metal surface |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IN166218B (en) * | 1984-11-09 | 1990-03-31 | Framatome & Cie | |
DE3527923A1 (en) * | 1985-08-03 | 1987-02-12 | Baiker Ag | Process and device for stabilizing the wall of a bore by shot blasting |
FR2612291B1 (en) * | 1987-03-13 | 1992-05-07 | Framatome Sa | DEVICE AND METHOD FOR CONTROLLING THE EFFICIENCY OF PARTICLE HAMMING OF THE INTERIOR SURFACE OF A STEAM GENERATOR TUBE |
EP0561573B1 (en) * | 1992-03-13 | 1996-07-10 | Westinghouse Electric Corporation | A continuous shot peening system and method for shot peening a plurality of tubes |
FR2698576B1 (en) * | 1992-11-30 | 1995-02-17 | Framatome Sa | Method and device for repairing a defective area of the wall of a metal part and in particular of a tubular part. |
US5307661A (en) * | 1993-04-27 | 1994-05-03 | Westinghouse Electric Corp. | System and method for shot peening reactor vessel penetrations |
JP3674306B2 (en) * | 1998-05-08 | 2005-07-20 | スズキ株式会社 | Cylinder inner surface blasting method |
DE10132451A1 (en) * | 2001-07-04 | 2003-01-30 | Bosch Gmbh Robert | Device for removing material arranged inside a workpiece |
CN1986161A (en) * | 2005-12-23 | 2007-06-27 | 上海汽车股份有限公司中国弹簧厂 | Inner wall shot blasting process for hollow stabilizing rod |
CN201082519Y (en) * | 2007-04-13 | 2008-07-09 | 大庆石油管理局 | Middle and small diameter long-distance pipeline inner sand spraying device |
US8448880B2 (en) * | 2007-09-18 | 2013-05-28 | Flow International Corporation | Apparatus and process for formation of laterally directed fluid jets |
EP2283971A4 (en) * | 2008-03-26 | 2014-03-19 | Nippon Steel & Sumitomo Metal Corp | Scale removing method and scale removing device |
JP2012179696A (en) * | 2011-03-02 | 2012-09-20 | Tokyo Electric Power Co Inc:The | Nozzle for blasting device, and surface treatment method |
DE102011005762A1 (en) * | 2011-03-18 | 2012-09-20 | AGTOS Gesellschaft für technische Oberflächensysteme mbH | Blasting machine with a blast cabin |
DE102014102147B4 (en) * | 2014-02-19 | 2017-03-09 | Wheelabrator Group Gmbh | A method of solidifying blasting a pipe inner wall of a curved workpiece with a workpiece bore and jet nozzle unit and working chamber system therefor |
-
2014
- 2014-02-19 DE DE102014102147.9A patent/DE102014102147B4/en active Active
-
2015
- 2015-02-19 PL PL15715140T patent/PL3107688T3/en unknown
- 2015-02-19 HU HUE15715140A patent/HUE050262T2/en unknown
- 2015-02-19 US US15/119,237 patent/US11059146B2/en active Active
- 2015-02-19 RU RU2016136983A patent/RU2690555C2/en active
- 2015-02-19 ES ES15715140T patent/ES2809492T3/en active Active
- 2015-02-19 CN CN201580012905.3A patent/CN106102999B/en active Active
- 2015-02-19 MX MX2016010686A patent/MX369918B/en active IP Right Grant
- 2015-02-19 WO PCT/DE2015/100068 patent/WO2015124147A1/en active Application Filing
- 2015-02-19 EP EP15715140.8A patent/EP3107688B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
HUE050262T2 (en) | 2020-11-30 |
DE102014102147A1 (en) | 2015-08-20 |
EP3107688B1 (en) | 2020-05-06 |
MX369918B (en) | 2019-11-26 |
RU2016136983A3 (en) | 2018-10-01 |
CN106102999A (en) | 2016-11-09 |
US11059146B2 (en) | 2021-07-13 |
RU2016136983A (en) | 2018-03-22 |
WO2015124147A1 (en) | 2015-08-27 |
ES2809492T3 (en) | 2021-03-04 |
CN106102999B (en) | 2018-05-08 |
MX2016010686A (en) | 2016-11-23 |
RU2690555C2 (en) | 2019-06-04 |
US20170008151A1 (en) | 2017-01-12 |
PL3107688T3 (en) | 2020-11-16 |
DE102014102147B4 (en) | 2017-03-09 |
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