CN109366052B - Telescopic internal stay frock - Google Patents
Telescopic internal stay frock Download PDFInfo
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- CN109366052B CN109366052B CN201811506357.1A CN201811506357A CN109366052B CN 109366052 B CN109366052 B CN 109366052B CN 201811506357 A CN201811506357 A CN 201811506357A CN 109366052 B CN109366052 B CN 109366052B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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Abstract
One end of a left-handed screw is arranged in a screw mounting hole at the geometric center of the plane of a support plate, and the left-handed screw is in running fit with the screw mounting hole; the left-hand thread at the other end of the left-hand screw is arranged in the threaded hole at the center of one end of the sleeve. One end of the right-handed screw is arranged in a screw mounting hole at the geometric center of the plane of the other supporting plate, and the right-handed screw is in running fit with the screw mounting hole; the right-hand thread at the other end of the right-hand screw is arranged in the threaded hole at the center of the other end of the sleeve. The device has a telescopic function, is placed in the shell in a shortened state, then extends to support the cylinder, realizes rigid constraint on the cylinder, reduces welding deformation, and eliminates deformation stress through stress relief annealing heat treatment with a tool, so that the roundness of the welded cylinder is ensured, and the roundness of the shell is reduced to 2.5mm from 10mm without the tool.
Description
Technical Field
The invention relates to the field of welding deformation control of a solid engine shell, in particular to a deformation control inner support tool in the process of welding an external part on the solid engine shell.
Background
The solid engine shell is mainly formed by assembling and welding a front flange, a rear flange and a cylinder, the inner diameters of the front flange and the rear flange are far smaller than the inner diameter of the cylinder, various external parts need to be welded on the outer molded surface of the cylinder after the shell is formed, and the cylinder is easy to deform in the process of welding the external parts due to the fact that the wall thickness of the cylinder is thin, and the roundness of a product is affected. The conventional solution is to adopt a tool to rigidly support the cylinder in the cylinder to reduce deformation, the currently common internal support mode is an integral internal support tool, but the diameter expansion range of the integral internal support tool is not large, and the problem that the integral internal support tool cannot be placed in a shell of a solid engine with the front flange and the rear flange having the inner diameter far smaller than the inner diameter of the cylinder exists.
The patent CN106271354A "an automatic centering inner support" proposes an integral inner support tool which adopts a sliding groove structure with different depths to realize tool extension and retraction; in patent CN104625136A, a split adjustable internal support tool proposes that a split support block is adopted, and an inclined plane T-shaped groove structure is utilized to realize the internal support effect of the support block on a workpiece; patent CN108608352A "an internal stay chuck" has mentioned that the adoption triangle-shaped screw thread or trapezoidal thread structure realize the frock and have risen the footpath function to carry out the frock of internal stay to the product, but these three kinds of modes are risen the footpath scope and all are less, and for above-mentioned solid engine shell, the condition that its both ends and middle internal diameter differ greatly, the frock can't get into the casing inside when undergauge to the minimum diameter, thereby realizes the internal stay to the casing middle part.
Patent CN108213829A "a staggered spoke type retractable tool for friction stir welding and its adjusting method" mentions that the tool shrinkage function is realized by using a layered staggered radial arc plate structure and a pneumatic device, but the pneumatic device structure has a certain limitation in the range of the expansion diameter of a small-diameter product, and cannot perform stress relief heat treatment along with the product, and the deformation control effect is relatively poor.
Disclosure of Invention
In order to overcome the defects that the whole internal support tool cannot be placed in a shell and the welding deformation cannot be effectively controlled in the prior art, the invention provides a telescopic internal support tool.
The invention comprises two support plates, a sleeve and a screw. The number of the screws is two, and the screws are respectively a left-handed screw and a right-handed screw. Wherein: one end of the left-handed screw is arranged in a screw mounting hole at the geometric center of the plane of the support plate, and the left-handed screw is in running fit with the screw mounting hole; the left-hand thread at the other end of the left-hand screw is arranged in the threaded hole at the center of one end of the sleeve. One end of the right-handed screw is arranged in a screw mounting hole at the geometric center of the plane of the other supporting plate, and the right-handed screw is in running fit with the screw mounting hole; the right-hand thread at the other end of the right-hand screw is arranged in the threaded hole at the center of the other end of the sleeve.
One surface of the two support plates is arc-shaped, and the curvature radius of the arc-shaped is the same as that of the inner surface of the workpiece. The other surface of each supporting plate is a plane, and a screw mounting hole is formed in the geometric center of the plane; the screw mounting hole is a blind hole.
The inner surface of the screw mounting hole is divided into two sections, a thread section is arranged at the position close to the hole opening, and a smooth section is arranged at the position close to the hole bottom; the length of the thread section is as follows: the length of the smooth segment is 2: 3.
The outer circumferential surface of the left-handed screw is divided into three sections, namely a connecting section positioned at one end of the left-handed screw, a left-handed thread section positioned at the other end of the left-handed screw and a hexagonal section positioned between the connecting section and the left-handed thread section. The end of the connecting section is provided with an external thread matched with the thread section of the screw mounting hole on the supporting plate. The end face of one end of the left-handed screw connecting section is a spherical surface, so that the central vertex of the end face is in point fit with the bottom surface of the screw mounting hole.
The structure of the right-handed screw is similar to that of the left-handed screw. The difference lies in that one end of the right-handed screw is a connecting section, and the other end is a right-handed thread section.
The centers of the end faces of the two ends of the sleeve are threaded blind holes, one end of the sleeve is a left-handed thread matched with the left-handed screw, and the other end of the sleeve is a right-handed thread matched with the right-handed screw.
The invention is used for controlling welding deformation and ensuring the roundness of the shell in the process of welding external parts on the outer profile of the cylindrical part of the shell. The invention has the telescopic function, is placed in the shell under the shortened state, then extends to support the cylinder, realizes the rigid constraint on the cylinder, reduces the welding deformation, and eliminates the deformation stress through the stress relief annealing heat treatment with a tool, thereby ensuring the roundness of the welded cylinder.
The invention can realize the deformation control of the cylinder part in the welding process of the external part of the solid engine shell. The principle of the invention for controlling welding deformation is as follows: at first, utilize a left right double thread structure in frock both ends, reach under the circumstances of only rotatory sleeve, just can realize that the frock both ends are flexible simultaneously, convenient operation on the one hand, on the other hand can increase the flexible range of frock by a wide margin, and to the work piece that certain diameter is 300mm, the flexible range of interior stay frock that uses can reach 90mm, and the frock of being convenient for gets into inside the casing. Secondly, through the spherical structure at the top ends of the left bolt and the right bolt, the middle supporting component and the supporting plates at two ends form point contact in the use process of the tool, the position of the supporting plates can be automatically adjusted in the process of jacking the cylinder by the point contact, the phenomenon that the supporting plates and the cylinder form point or line contact due to the installation inclination of the tool and the inner surface of the cylinder is damaged by jacking is avoided, meanwhile, the supporting plates and the cylinder can be tightly attached by the point contact, rigid constraint is formed on the cylinder, welding stress is eliminated through stress-relief annealing heat treatment, and therefore welding deformation is controlled.
Tests prove that after the welding deformation prevention inner support tool is used in a shell, when parts outside the shell are welded, deformation of a lower couch generated by welding is restrained, after stress relief annealing is carried out by the tool, most of welding stress is released, after the tool is disassembled, although a small part of stress is released, workpiece deformation is caused, compared with a tool-free state, the welding deformation is effectively controlled, and the roundness of the shell is reduced to 2.5mm from 10mm without the tool.
Drawings
FIG. 1 is a schematic diagram of a solid engine to be welded.
Fig. 2 is a structural schematic diagram of a deformation-preventing internal support tool of a solid engine.
FIG. 3 is a schematic view of a support plate; wherein fig. 3a is a front view and fig. 3b is a left side view of fig. 3 a.
FIG. 4 is a schematic structural view of a left-handed screw; fig. 4a is a front view, and fig. 4b is a view from direction a-a of fig. 4 a.
FIG. 5 is a schematic view of the sleeve structure; fig. 5a is a front view, and fig. 5B is a view from direction B-B of fig. 5 a.
FIG. 6 is a schematic view of the assembly of the present invention with a solid engine to be welded; fig. 6a is a front view, and fig. 6b is a view along direction C-C of fig. 6 a. In the figure:
1. a front flange; 2. a cylinder; 3. an external part; 4. a rear flange; 5. a support plate; 6. a left-handed screw; 7. a sleeve; 8. and (4) a right-handed screw.
Detailed Description
The embodiment is a welding deformation control inner support tool for a certain solid rocket engine. The length of the front flange is 300mm, the inner diameter is 230mm, the length of the cylinder is 800mm, the inner diameter is 300mm, the length of the rear flange is 200mm, the inner diameter is 220mm, the length of the external part is 30mm, the width is 18mm, and the height is 30 mm. After the external parts are assembled and welded, the roundness requirement of the cylinder is not more than 3mm, and the material of the parts is 30CrMnSiA high-strength steel.
The tooling of the embodiment comprises two supporting plates 5, a sleeve 7 and a screw rod. The number of the screws is two, namely a left-handed screw 6 and a right-handed screw 8. Wherein: one end of a left-handed screw 6 is arranged in a screw mounting hole at the geometric center of the plane of a supporting plate, and the left-handed screw is in running fit with the screw mounting hole; the left-hand thread at the other end of the left-hand screw 6 is arranged in a threaded hole at the center of one end of the sleeve 7. One end of a right-handed screw 8 is arranged in a screw mounting hole at the geometric center of the plane of the other supporting plate, and the right-handed screw is in running fit with the screw mounting hole; the right-hand thread at the other end of the right-hand screw 8 is arranged in the threaded hole at the center of the other end of the sleeve 7.
The two support plates 5 are rectangular plates. One surface of each support plate is arcuate with a radius of curvature that is the same as the radius of curvature of the inner surface of the workpiece. The other surface of each supporting plate is a plane, and a screw mounting hole is formed in the geometric center of the plane; the screw mounting hole is a blind hole. The inner surface of the screw mounting hole is divided into two sections, a thread section is arranged at the position close to the hole opening, and a smooth section is arranged at the position close to the hole bottom; the length of the thread section is as follows: the length of the smooth segment is 2: 3. And a weight reduction groove is machined in the plane.
The outer circumferential surface of the left-hand screw 6 is divided into three sections, namely a connecting section positioned at one end of the left-hand screw, a left-hand thread section positioned at the other end of the left-hand screw and a hexagonal section positioned between the connecting section and the left-hand thread section. The end of the connecting section is provided with an external thread matched with the thread surface at the orifice of the screw mounting hole on the supporting plate 5, the joint of the connecting section and the hexagonal section is provided with a polished rod, and the diameter of the polished rod is slightly smaller than the inner diameter of the screw mounting hole.
During assembly, after the external thread of the end of the connecting section enters the screw mounting hole through the thread surface at the orifice of the screw mounting hole, the external thread surface is matched with the smooth surface in the screw mounting hole, so that the polished rod is matched with the internal thread surface at the orifice of the screw mounting hole. And the axial position of the left-handed screw is limited by the internal thread surface at the orifice of the screw mounting hole. The end face of one end of the left-handed screw connecting section is a spherical surface, so that the central vertex of the end face is in point fit with the bottom surface of the screw mounting hole.
The structure of the right-handed screw 8 is similar to that of the left-handed screw 6. The difference lies in that one end of the right-handed screw is a connecting section, and the other end is a right-handed thread section.
The centers of the end faces of the two ends of the sleeve 7 are threaded blind holes, one end of the sleeve is a left-handed thread matched with the left-handed screw 6, and the other end of the sleeve is a right-handed thread matched with the right-handed screw 8. The middle part of the sleeve 7 in the length direction is hexagonal so as to be convenient for operation.
In this embodiment, the support plate 5 has two pieces, each piece is formed by processing a steel plate with the size of 200mm × 190mm × 40mm, one surface of the support plate is processed with an arc surface with the same radius as the inner profile of the cylinder along the size direction of 190mm, the other surface of the support plate is a plane, an M30 screw rod installation hole with the depth of 20mm is arranged at the geometric center of the plane, and a thread surface with the length of 8mm is arranged at the opening of the screw rod installation hole. A weight reduction groove is machined along the 200mm direction of the supporting plate.
The left-handed screw 6 is formed by processing a carbon steel bar with the diameter of phi 30mm and the length of 92mm, one end of the left-handed screw is an M30 screw thread with a spherical surface with the radius of 38mm, the total length of the left-handed screw is 9mm, a reducing area with the length of 13mm and the diameter of phi 26mm is close to the screw thread, the other end of the left-handed screw is an M30 left-handed screw thread with the length of 50mm, the middle area of the left-handed screw is a hexahedron structure with the length of 20mm and.
The right-handed screw 8 and the left-handed screw 6 have basically the same structure, and the only difference is that the 50mm long M30 thread on the right-handed screw 8 is a right-handed thread.
The sleeve 7 is formed by processing a carbon steel bar with the diameter of 50mm and the length of 115mm, an M30 left-handed threaded hole with the length of 40mm is processed at one end of the sleeve, a phi 30.5mm tool withdrawal groove with the length of 5mm is processed at the position close to the threaded hole, an M30 threaded hole with the length of 40mm is processed at the other end of the sleeve, a phi 30.5mm tool withdrawal groove with the length of 5mm is processed at the position close to the threaded hole, the middle area of the sleeve is of a hexahedral structure with the length of 20mm and the inscribed circle of 50 mm;
during the use, at first connect 2 backup pads 5 and left-handed screw 6, sleeve 7, dextrorotation screw 8 in proper order through the screw thread, form the internal stay frock. Then through rotatory sleeve 7, make interior frock both ends of propping shorten simultaneously, get into the drum until can erectting, wait after the frock reachs the region that needs to support, rethread reverse rotation sleeve 7 makes interior frock both ends of propping extend simultaneously, until the arcwall face of two backup pads and the internal surface of drum laminate completely to the realization is to the support of drum. After the external part is welded, the internal support tool is driven to carry out stress relief annealing heat treatment, and after annealing, the internal support tool is shortened and taken out.
In the embodiment, two supporting plates 5 are respectively processed by a steel plate with the size of 200mm multiplied by 190mm multiplied by 40mm, an arc surface with the same radius as the radius of the inner profile of the cylinder is processed on the plane of 200mm multiplied by 190mm on one side of the steel plate, a lightening groove with the length of 200mm, the width of 100mm and the depth of 15mm and positioned at the center of the steel plate is formed on the plane of 200mm multiplied by 190mm on the other side of the steel plate, a non-lightening area with the diameter of phi 54mm is reserved at the center of the lightening groove, an M30 threaded hole with the length of 8mm is processed at the center of the non-lightening area, and a tool withdrawal groove with the diameter of phi 32mm and the length of 12mm is processed at the position adjacent to the threaded hole. The left-handed screw 6 is formed by processing a carbon steel bar with the diameter of phi 30mm and the length of 92mm, one end of the left-handed screw is an M30 thread with a spherical surface with the radius of 38mm, the total length of the left-handed screw is 9mm, a reducing area with the length of 13mm and the diameter of phi 26mm is close to the thread, the other end of the left-handed screw is an M30 left-handed thread with the length of 50mm, the middle area of the left-handed screw is a hexahedron structure with the length of 20mm and the inscribed circle; the sleeve 7 is formed by processing a carbon steel bar with the diameter of 50mm and the length of 115mm, an M30 left-handed threaded hole with the length of 40mm is processed at one end of the bar, a phi 30.5mm tool withdrawal groove with the length of 5mm is processed at the position close to the threaded hole, an M30 threaded hole with the length of 40mm is processed at the other end of the bar, a phi 30.5mm tool withdrawal groove with the length of 5mm is processed at the position close to the threaded hole, the middle area of the bar is a hexahedral structure with the length of 20mm and the inscribed circle of 50 mm; the right-hand screw 8 is of substantially the same construction as the left-hand screw 6, the only difference being that the 50mm long M30 flight on the left-hand screw 6 is a left-hand flight, while the 50mm long M30 flight on the right-hand screw 8 is a right-hand flight.
During the use, at first connect 2 backup pads 5 and left-handed screw 6, sleeve 7, dextrorotation screw 8 in proper order through the screw thread, form the internal stay frock. Then through rotatory sleeve 7, make interior frock both ends shorten simultaneously, until can erect and get into the drum, wait after the frock reachs the region that needs to support, rethread reverse rotation sleeve 7 makes interior frock both ends extend simultaneously, until its 2 backup pads 5 and drum laminate completely to the realization is to the supporting role of drum, takes interior frock to carry out destressing annealing heat treatment after the outside part welding is accomplished, shortens the interior frock after the annealing and takes out.
Claims (3)
1. A telescopic internal support tool is characterized by comprising two support plates, a sleeve and a screw rod; the number of the screws is two, namely a left-handed screw and a right-handed screw; wherein: one end of the left-handed screw is arranged in a screw mounting hole at the geometric center of the plane of the support plate, and the left-handed screw is in running fit with the screw mounting hole; the axial position of the left-handed screw is limited by an internal thread surface at the orifice of the screw mounting hole; the left-handed thread at the other end of the left-handed screw is arranged in the threaded hole in the center of one end of the sleeve; one end of the right-handed screw is arranged in a screw mounting hole at the geometric center of the plane of the other supporting plate, and the right-handed screw is in running fit with the screw mounting hole; the right-hand thread at the other end of the right-hand screw is arranged in the threaded hole in the center of the other end of the sleeve;
the outer circumferential surface of the left-handed screw is divided into three sections, namely a connecting section positioned at one end of the left-handed screw, a left-handed thread section positioned at the other end of the left-handed screw and a hexagonal section positioned between the connecting section and the left-handed thread section; the end of the connecting section is provided with an external thread matched with a thread surface at the orifice of the screw mounting hole on the supporting plate, the joint of the connecting section and the hexagonal section is provided with a polished rod, and the diameter of the polished rod is slightly smaller than the inner diameter of the screw mounting hole; the end surface of one end of the left-handed screw connecting section is a spherical surface, so that the central vertex of the end surface is in point fit with the bottom surface of the screw mounting hole;
one surface of each of the two support plates is arc-shaped, and the curvature radius of the arc-shaped support plates is the same as that of the inner surface of the workpiece; the other surface of each supporting plate is a plane, and a screw mounting hole is formed in the geometric center of the plane; the screw mounting hole is a blind hole;
the inner surface of the screw mounting hole is divided into two sections, a thread section is arranged at the position close to the hole opening, and a smooth section is arranged at the position close to the hole bottom; the length of the thread section is as follows: the length of the smooth section is 2: 3;
when the external thread of the end of the connecting section enters the screw mounting hole through the thread surface at the orifice of the screw mounting hole, the external thread surface is matched with the smooth surface in the screw mounting hole, so that the polished rod is matched with the internal thread surface at the orifice of the screw mounting hole.
2. The telescopic internal stay tool set forth in claim 1, wherein the structure of the right-handed screw is similar to the structure of the left-handed screw; the difference lies in that one end of the right-handed screw is a connecting section, and the other end is a right-handed thread section.
3. The telescopic internal stay tool as claimed in claim 1, wherein the centers of the end faces of the two ends of the sleeve are threaded blind holes, one end of the blind holes is a left-handed thread matched with a left-handed screw, and the other end of the blind holes is a right-handed thread matched with a right-handed screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811506357.1A CN109366052B (en) | 2018-12-10 | 2018-12-10 | Telescopic internal stay frock |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811506357.1A CN109366052B (en) | 2018-12-10 | 2018-12-10 | Telescopic internal stay frock |
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| CN109366052A CN109366052A (en) | 2019-02-22 |
| CN109366052B true CN109366052B (en) | 2021-03-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ES2291752T3 (en) * | 2003-01-09 | 2008-03-01 | Nego 2000, S.C.L. | MACHINE FOR THE PREPARATION OF CREAMS. |
| CN201157955Y (en) * | 2008-03-05 | 2008-12-03 | 湖南湘东化工机械有限公司 | Internal-support round fixture for preventing welding deformation |
| CN201731211U (en) * | 2010-07-28 | 2011-02-02 | 华创天元实业发展有限责任公司 | Internal supporting tool used for welding composited pipe |
| CN202527895U (en) * | 2012-03-21 | 2012-11-14 | 上虞市鹏翔暖通设备有限公司 | Expansion rounding disc for machining |
| CN103631011B (en) * | 2013-12-17 | 2015-09-09 | 吉林大学 | A kind of microscope is focused objective table device fast |
| CN205290741U (en) * | 2015-12-29 | 2016-06-08 | 江苏勇龙电气有限公司 | Interior support frock of a shielding section of thick bamboo |
| CN206662627U (en) * | 2017-04-26 | 2017-11-24 | 山西阳煤化工机械（集团）有限公司 | Large diameter thin wall tower equipment Cylinder assembly adjusts supporting tool |
| CN206952911U (en) * | 2017-07-20 | 2018-02-02 | 北京市燃气集团有限责任公司 | Flange opener |
| CN107649542A (en) * | 2017-09-27 | 2018-02-02 | 洛阳乾中新材料科技有限公司 | Inner bearing type school shape frock |
| CN207514959U (en) * | 2017-11-08 | 2018-06-19 | 南京海亿自动化技术有限公司 | A kind of air hose with inner supporting structure |
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