CN111266436A - Pit shape correction device and method for variable-section special-shaped pipe - Google Patents
Pit shape correction device and method for variable-section special-shaped pipe Download PDFInfo
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- CN111266436A CN111266436A CN201911193601.8A CN201911193601A CN111266436A CN 111266436 A CN111266436 A CN 111266436A CN 201911193601 A CN201911193601 A CN 201911193601A CN 111266436 A CN111266436 A CN 111266436A
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- 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
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/10—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments
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Abstract
The invention provides a pit shape correcting device and method for a variable cross-section special-shaped pipe. During shape correction, according to the radian shape of an inner profile at the position of a pit of the special-shaped pipe, selecting matched conformal ejector blocks, mounting the two conformal ejector blocks at the tail end of the rotary ejector rod, and then fixing the rotary ejector rod on a piston rod through a threaded connecting piece of a through hole in the rotary ejector rod; the installed hollow jack is placed into the special-shaped pipe, the position of the random ejector block corresponds to the position of the pit, a manual pump placed outside the special-shaped pipe is used for exerting pressure, a piston rod of the hollow jack is enabled to slowly move upwards, the random ejector block is in contact with the pit, the pit is gradually jacked up, and the pit is changed into a smooth molded surface. The device and the method can simply and effectively eliminate the pits of the variable cross-section special-shaped pipe, so that the surface of the part is smooth, and the qualification rate of the part is improved.
Description
Technical Field
The invention relates to a precise shaping and correcting device and method for a pipe, in particular to a pit correcting device and method for a variable-section special-shaped pipe.
Background
With the rapid development of the aerospace craft, the complexity and the precision requirements of parts of the aerospace craft are remarkably improved. Particularly, the special-shaped pipe of the core part aluminum alloy air inlet channel of the aerospace craft has the advantages that the section is usually variable (as shown in figure 1), the diameter is small, the pipe is bent, the wall is thin, and the length of the pipe is long due to product requirements. Therefore, during the process of forming or transferring the air inlet channel, pits are easy to appear on the surface, and the profile of the part is not in accordance with the design requirement. At present, a hammer is used for knocking to eliminate pits, but the hammer cannot stretch into the pipe to be shaped when the pipe is long and has a variable cross section, a small diameter and a bending length.
Disclosure of Invention
In order to overcome the defects of the prior art, the inventor of the invention carries out intensive research, provides a variable cross-section special-shaped pipe pit shape correcting device and method, solves the problems that the prior art uses a pipe pit which has a variable cross section, a small diameter, a long pipe length and can not be shaped by a hammer, can simply and effectively eliminate the pit, enables the surface of a part to be smooth, and improves the qualification rate of the part, thereby completing the invention.
The invention aims to provide the following technical scheme:
in a first aspect, the invention provides a pit shape correcting device for a variable-section special-shaped pipe, which comprises a manual pump, a hydraulic hose, a hollow jack, a rotary ejector rod and a shape following ejector block, wherein the manual pump is connected with the hydraulic hose; wherein the content of the first and second substances,
the manual pump is provided with a joint, the hollow jack is provided with an oil valve structure, and the joint of the manual pump is connected with the oil valve of the hollow jack through a hydraulic hose;
the upper part of the side surface of the piston rod protruding out of the hollow jack is provided with a threaded hole;
the rotary ejector rod is provided with a through hole and is fixed on the piston rod through the matching of a threaded connecting piece penetrating through the through hole and the threaded hole;
the free-type ejector block is a detachable free-type ejector block and is provided with a connecting section and a functional section, the connecting section is cylindrical and is used for being connected and fixed with the tail end of the rotating ejector rod, and the functional section is a block body which is manufactured according to the radian shape of the inner molded surface of the special-shaped pipe and has the same radian shape;
when a wrench of the manual pump is pressed, the piston rod rises to drive the rotary ejector rod and the tail end of the rotary ejector rod to move along with the ejector block, and the functional section is contacted with the concave pit to gradually jack up the concave pit.
In a second aspect, the invention provides a method for correcting a pit of a variable cross-section special-shaped pipe, which is implemented by the pit correcting device for the variable cross-section special-shaped pipe in the first aspect, and the method comprises the following steps:
step 1, placing the special-shaped pipe with the pits in two random-shaped clamping rings of a fixed clamping seat, sliding the random-shaped clamping rings on a guide rail of a base, further moving the random-shaped clamping rings to a position matched with the special-shaped pipe, locking two ends of a supporting column with the guide rail and the random-shaped clamping rings respectively, fixing the positions of the random-shaped clamping rings, and then closing an opening of the random-shaped clamping ring 7 or closing two split half rings;
and 5, repeating the step 3 and the step 4, and taking out the special-shaped pipe from the random clamp ring after the pit is corrected.
The pit shape correcting device and method for the variable cross-section special-shaped pipe provided by the invention have the beneficial technical effects that:
(1) the method is widely applicable to both round pipes and special-shaped pipes;
(2) the device has simple structure, no expensive apparatus and convenient popularization and use.
Drawings
FIG. 1 shows an example of a cross-sectional shape of a variable cross-section profiled tubing;
FIG. 2 is a schematic diagram showing the connection of a hand pump to a hydraulic hose in the present invention;
FIG. 3 is a schematic view showing the connection of the rotary jack rod of the present invention to a hollow jack;
FIG. 4 is a schematic view showing the connection of the two split-type push rods to the hollow jack according to the present invention;
FIG. 5 is a schematic diagram of a random top block structure according to the present invention;
FIG. 6 is a schematic diagram of a random top block structure according to the present invention;
fig. 7 is a schematic structural diagram of a fixed cassette according to a preferred embodiment of the present invention.
The reference numbers illustrate:
1-manual pump, 2-hydraulic hose, 3-hollow jack, 31-oil valve, 32-piston rod, 321-threaded hole, 4-rotary ejector rod, 51-connecting section, 52-functional section, 6-base, 61-guide rail, 62-auxiliary rail, 7-free snap ring, 8-support column
Detailed Description
The invention is explained in more detail below with reference to the figures and examples. The features and advantages of the present invention will become more apparent from the description.
According to a first aspect of the invention, as shown in fig. 2 to 7, a pit shape correcting device for a variable cross-section special-shaped pipe is provided, and the device comprises a manual pump 1, a hydraulic hose 2, a hollow jack 3, a rotary ejector rod 4 and a shape following ejector block;
the manual pump 1 is provided with a joint, the hollow jack 3 is provided with an oil valve 31 structure, and the joint of the manual pump 1 is connected with the oil valve 31 of the hollow jack 3 through the hydraulic hose 2; as shown in fig. 2;
the upper part of the side surface of the piston rod 32 protruded from the hollow jack 3 is provided with a threaded hole 321,
the rotary ejector rod 4 is provided with a through hole and is fixed on the piston rod 32 through the matching of a threaded connecting piece penetrating through the through hole and the threaded hole 321; as shown in fig. 3 and 4;
the shape following ejector block is a detachable shape following ejector block and is provided with a connecting section 51 and a functional section 52, the connecting section 51 is cylindrical and is used for being connected and fixed with the tail end of the rotating ejector rod 4, and the functional section 52 is a block body which is manufactured according to the radian shape of the inner molded surface of the special-shaped pipe and has the same radian shape, as shown in fig. 5 and 6;
when the wrench of the manual pump 1 is pressed, the piston rod 32 rises to drive the rotary ejector rod 4 and the following ejector block at the tail end of the rotary ejector rod to move, and the functional section 52 is in contact with the pit to gradually jack up the pit.
In a preferred embodiment of the present invention, as shown in fig. 3, the rotating mandril 4 may be a single cylindrical rod, the outer circumference of the end of the rotating mandril 4 is threaded, the center of the cylinder of the connecting section 51 of the free-form jacking block is provided with a threaded hole, and the free-form jacking block is fixed at both ends or any one end of the rotating mandril 4 through threaded fit.
Or, only the center of the column body of the connecting section 51 of the free-form ejector block is provided with a groove body without threads, which is matched with the tail end of the rotating ejector rod 4, and the tail end of the rotating ejector rod 4 extends into the groove body to sleeve the free-form ejector block on the rotating ejector rod 4.
In a preferred embodiment of the present invention, as shown in fig. 4, the rotating push rod 4 is two split push rods, one end of the rotating push rod 4 is cylindrical for fixing the follower-type push block, the other end is flat with a through hole for fixing on the piston rod 32, and the angle between the two split push rods is adjustable for pushing the pits in different directions.
The periphery of the tail end of the rotary ejector rod 4 connected with the following ejector block is provided with threads, the center of a cylinder of the connecting section 51 of the following ejector block is provided with a threaded hole, and the following ejector block is fixed at the tail end of the rotary ejector rod 4 through threaded fit. Or, only the center of the column body of the connecting section 51 of the free-form ejector block is provided with a groove body without threads, which is matched with the tail end of the rotating ejector rod 4, and the tail end of the rotating ejector rod 4 extends into the groove body to sleeve the free-form ejector block on the rotating ejector rod 4.
According to the invention, the special-shaped pipe is an aluminum alloy air inlet channel for the aerospace craft, the diameter of the special-shaped pipe is 200-300 mm, the shape is bent, the wall is thin (3-4 mm), the length of the pipe is longer (500-1500 mm), and particularly the shape is bent, which means that pit correction of the special-shaped pipe cannot be performed on the ground/plane.
In the invention, as shown in fig. 7, the fixing clamping seat comprises a base 6 and at least two conformal clamping rings 7, wherein the base 6 is used for providing a supporting and fixing position point for the special-shaped pipe and comprises two parallel guide rails 61; the random-type snap ring 7 is sleeved on the periphery of the special-shaped pipe, and two ends of the random-type snap ring are fixed on the guide rail 61 through the support columns 8 respectively, so that the special-shaped pipe is fixed.
The free-form snap ring 7 is obtained by processing an alloy section such as an aluminum alloy section, and the shape of the free-form snap ring 7 is the same as the cross section of the set position of the special-shaped pipe. And after the random clamping ring 7 moves to the position matched with the special-shaped pipe, the random clamping ring is positioned on the base 6.
Preferably, the free-form snap ring 7 is an open-type structure and has an opening, and the free-form snap ring structures at two ends of the opening are provided with connecting parts for a bolt and a nut to close and fix the opening, for example, the connecting parts are connecting plates with through holes.
Preferably, the conformal snap ring 7 is in a structure of two split half rings, and the two split half rings have connecting parts at two ends for bolts and nuts to close and fix the two split half rings, for example, the connecting parts are connecting plates with through holes.
In the invention, the two parallel guide rails 61 of the base 6 are sliding guide rails, the supporting column 8 is fixed on a sliding block of the sliding guide rails, and the follower-type snap ring 7 slides on the sliding guide rails along with the supporting column 8.
Preferably, the base 6 further includes two parallel sub-rails 62 connecting the two parallel guide rails 61 and intersecting perpendicularly to the guide rails 61, and the sub-rails 62 fix the two guide rails 61 so that the guide rails 61 are not easily deformed.
More preferably, the secondary rail 62 is provided with a scale, and the position of the two guide rails 61 is recorded through the scale, so that the parallel installation of the two guide rails is facilitated.
More preferably, the secondary rail 62 is a movable slide rail, the guide rail 61 is fixed on a slide block of the secondary rail 62, and the distance between the two guide rails 61 is adjusted by the slide of the slide block.
According to a second aspect of the invention, a method for correcting the pit shape of the variable cross-section special-shaped pipe is provided, and the method is implemented by the pit shape correcting device for the variable cross-section special-shaped pipe, and comprises the following steps:
step 1, placing the special-shaped pipe with the pits in two conformal clamping rings 7 of a fixed clamping seat, enabling the conformal clamping rings 7 to slide on a guide rail 61 of a base 6 and further move to positions matched with the special-shaped pipe, locking two ends of a supporting column 8 with the guide rail 61 and the conformal clamping rings 7 respectively, fixing the positions of the conformal clamping rings 7, and then closing openings of the conformal clamping rings 7 or closing two split half rings;
and 5, repeating the step 3 and the step 4, and taking out the special-shaped pipe from the conformal snap ring 7 after the pit is corrected.
In the invention, the hollow jack 2 can be horizontally placed in the special-shaped pipe or inversely placed in the special-shaped pipe according to the position of the pit.
In the invention, when the rotating ejector rod 4 is a single cylindrical rod, the correction of a single pit can be implemented by pressing each time; when the rotary ejector rod 4 is two split ejector rods, the split ejector rods are not perpendicular to the piston rod 32 of the hollow jack 2, and the correction of the two pits can be implemented by adjusting the angle of the split ejector rods and pressing at each time.
In the invention, the height of the hollow jack is smaller than the diameter (or width) of the minimum section of the special-shaped pipe, and the section of the special-shaped pipe can be in any polygon shape.
In the invention, the special-shaped pipe can be an aluminum alloy air inlet channel for an aerospace vehicle, and is also applicable to circular pipelines or pipelines made of non-aluminum alloy materials, such as steel pipes, titanium alloy pipes and the like.
Examples
Example 1
Taking a certain aluminum alloy variable cross-section special-shaped pipe as an example, the cross-section change is shown in figure 1. The special-shaped pipe is made of 5A06 aluminum alloy, the length of the pipe in the axial direction is 1000mm, the wall thickness is 4.0mm, and the cross section of the pipe has various shapes including a circle and a closed figure consisting of curves and straight lines.
The pit shape correcting device for the aluminum alloy variable-section special-shaped pipe comprises a manual pump 1, a hydraulic hose 2, a hollow jack 3, a rotary ejector rod 4, a shape following ejector block, a base 6, two shape following snap rings 7 and a support column 8;
the joint of the manual pump 1 is connected with an oil valve 31 of the hollow jack 3 through a hydraulic hose 2; the upper part of the side surface of the piston rod 32 protruded from the hollow jack 3 is provided with a threaded hole 321; the rotary ejector rod 4 is a single cylindrical rod, a through hole is formed in the rotary ejector rod 4, and the rotary ejector rod 4 is fixed on the piston rod 32 through the matching of a threaded connecting piece penetrating through the through hole and the threaded hole 321; the free-type ejector block is a detachable free-type ejector block (shown in fig. 5 and 6) and is provided with a connecting section 51 and a functional section 52, the connecting section 51 is cylindrical and is used for being connected and fixed with the tail end of the rotating ejector rod 4, and the functional section 52 is a block body which is manufactured according to the radian shape of the inner molded surface of the special-shaped pipe and has the same radian shape; the periphery of the tail end of the rotary ejector rod 4 is provided with threads, the center of a cylinder body of the connecting section 51 of the conformal ejector block is provided with a threaded hole, and the threaded hole is fixed at two ends of the rotary ejector rod 4 in a threaded fit mode;
the base 6 comprises two parallel guide rails 61, and the following-type clamping ring 7 is fixed on the guide rails 61 through supporting columns 8. The free-form snap ring 7 is obtained by processing an aluminum alloy section, and the shape of the free-form snap ring 7 is the same as the cross section of the special-shaped pipe at different positions. The random-type snap ring 7 is of an open-type structure and is provided with an opening, and the random-type snap ring structures at two ends of the opening are provided with connecting plates for bolts and nuts to close and fix the opening.
The shape correcting method comprises the following steps:
step 1, placing the special-shaped pipe with the pits in two conformal clamping rings 7 of a fixed clamping seat, enabling the conformal clamping rings 7 to slide on a guide rail 61 of a base 6 and further move to positions matched with the special-shaped pipe, locking two ends of a supporting column 8 with the guide rail 61 and the conformal clamping rings 7 respectively, fixing the positions of the conformal clamping rings 7, and then closing openings of the conformal clamping rings 7;
and 5, repeating the step 3 and the step 4, and taking out the special-shaped pipe from the conformal snap ring 7 after the pit is corrected.
Example 2
Taking a certain circular steel pipe as an example, the circular steel pipe is No. 45 steel, the pipe has the axial length of 1000mm, the inner diameter of 300mm, the wall thickness of 3mm, and the cross section of the pipe is circular.
The round steel pipe pit shape correcting device comprises a manual pump 1, a hydraulic hose 2, a hollow jack 3, a rotary ejector rod 4, a free-form ejector block, a base 6, two free-form clamping rings 7 and a support column 8;
the joint of the manual pump 1 is connected with an oil valve 31 of the hollow jack 3 through a hydraulic hose 2; the upper part of the side surface of the piston rod 32 protruded from the hollow jack 3 is provided with a threaded hole 321; the rotary ejector rods 4 are two split ejector rods, one end of each rotary ejector rod 4 is cylindrical and used for fixing a random ejector block, the other end of each rotary ejector rod is flat with a through hole, the rotary ejector rods are fixed on the piston rod 32 through the matching of threaded connecting pieces penetrating through the through holes and the threaded holes 321, and the angle between the two split ejector rods can be adjusted through elastic threaded connecting pieces. The free-type ejector block is a detachable free-type ejector block (shown in fig. 5) and is provided with a connecting section 51 and a functional section 52, the connecting section 51 is cylindrical and is used for being connected and fixed with the tail end of the rotary ejector rod 4, and the functional section 52 is a block body which is manufactured according to the radian shape of the inner profile of the round steel pipe and has the same radian shape; the periphery of the tail end of the rotary ejector rod 4 is provided with threads, the center of a cylinder body of the connecting section 51 of the conformal ejector block is provided with a threaded hole, and the threaded hole is fixed at two ends of the rotary ejector rod 4 in a threaded fit mode;
the base 6 comprises two parallel guide rails 61, and the following-type clamping ring 7 is fixed on the guide rails 61 through supporting columns 8. The free-form snap ring 7 is obtained by processing an aluminum alloy section, and the shape of the free-form snap ring 7 is the same as the cross section of the special-shaped pipe at different positions. The random-type snap ring 7 is of an open-type structure and is provided with an opening, and the random-type snap ring structures at two ends of the opening are provided with connecting plates for bolts and nuts to close and fix the opening.
The shape correcting method comprises the following steps:
step 1, placing the round steel pipe with the pits in two conformal clamping rings 7 of a fixed clamping seat, enabling the conformal clamping rings 7 to slide on a guide rail 61 of a base 6, locking two ends of a supporting column 8 with the guide rail 61 and the conformal clamping rings 7 respectively, fixing the positions of the conformal clamping rings 7, and then closing openings of the conformal clamping rings 7;
and 4, after the pit is completely corrected, moving the position of the hollow jack 3, and repeating the step 3 to correct other pits until all pits are completely corrected.
The present invention has been described above in connection with preferred embodiments, but these embodiments are merely exemplary and merely illustrative. On the basis of the above, the invention can be subjected to various substitutions and modifications, and the substitutions and the modifications are all within the protection scope of the invention.
Claims (10)
1. A pit shape correcting device for a variable-section special-shaped pipe is characterized by comprising a manual pump (1), a hydraulic hose (2), a hollow jack (3), a rotary ejector rod (4) and a shape following ejector block; wherein the content of the first and second substances,
the manual pump (1) is provided with a joint, the hollow jack (3) is provided with an oil valve (31) structure, and the joint of the manual pump (1) is connected with the oil valve (31) of the hollow jack (3) through a hydraulic hose (2);
the upper part of the side surface of a piston rod (32) which protrudes from the hollow jack (3) is provided with a threaded hole (32) 1;
the rotary ejector rod (4) is provided with a through hole and is fixed on the piston rod (32) through the matching of a threaded connecting piece penetrating through the through hole and the threaded hole (32) 1;
the free-type ejector block is a detachable free-type ejector block and is provided with a connecting section (51) and a functional section (52), the connecting section (51) is cylindrical and is used for being connected and fixed with the tail end of the rotating ejector rod (4), and the functional section (52) is a block body which is manufactured according to the radian shape of the inner molded surface of the special-shaped pipe and has the same radian shape;
when a wrench of the manual pump (1) is pressed, the piston rod (32) rises to drive the rotary ejector rod (4) and the following ejector block at the tail end of the rotary ejector rod to move, and the functional section (52) is in contact with the concave pit to gradually jack up the concave pit.
2. The pit shape correcting device for the variable cross-section special-shaped pipe according to claim 1, wherein the rotary ejector rod (4) can be a single cylindrical rod, threads are machined on the periphery of the tail end of the rotary ejector rod (4), a threaded hole is formed in the center of a cylinder of a connecting section (51) of the free-form ejector block, and the free-form ejector block is fixed at two ends or any end of the rotary ejector rod (4) in a threaded fit mode;
or only arranging a groove body without threads matched with the tail end of the rotary ejector rod (4) in the center of the cylinder body of the connecting section (51) of the free-type ejector block, extending the tail end of the rotary ejector rod (4) into the groove body, and sleeving the free-type ejector block on the rotary ejector rod (4).
3. The pit reshaping device for the variable cross-section special-shaped pipe according to claim 1, wherein the rotary ejector rod (4) is two split ejector rods, one end of the rotary ejector rod (4) is cylindrical and used for fixing a conformal ejector block, the other end of the rotary ejector rod is flat with a through hole and used for fixing on a piston rod (32), and the angle between the two split ejector rods is adjustable to perform jacking on pits in different directions.
4. The pit shape correcting device for the variable cross-section special-shaped pipe according to claim 3, wherein the periphery of the tail end of the rotary ejector rod (4) connected with the random ejector block is provided with a thread, the center of a cylinder of a connecting section (51) of the random ejector block is provided with a threaded hole, and the random ejector block is fixed at the tail end of the rotary ejector rod (4) in a thread fit manner;
or only arranging a groove body without threads matched with the tail end of the rotary ejector rod (4) in the center of the cylinder body of the connecting section (51) of the free-type ejector block, extending the tail end of the rotary ejector rod (4) into the groove body, and sleeving the free-type ejector block on the rotary ejector rod (4).
5. The pit correction device for the variable cross-section special-shaped pipe according to claim 1, further comprising a fixed clamping seat, wherein the fixed clamping seat comprises a base (6) and at least two conformal clamping rings (7),
the base (6) is used for providing a supporting and fixing position for the special-shaped pipe and comprises two parallel guide rails (61);
the shape of the conformal snap ring (7) is the same as the cross section of the set position of the special-shaped pipe, the conformal snap ring is sleeved on the periphery of the special-shaped pipe, and two ends of the conformal snap ring are respectively fixed on the guide rail (61) through the support column (8), so that the special-shaped pipe is fixed.
6. The pit correction device for the variable cross-section special-shaped pipe according to claim 5, wherein the conformal snap ring (7) is of an open structure and is provided with an opening, and the conformal snap ring structures at two ends of the opening are provided with connecting parts for a bolt and a nut to close and fix the opening.
7. The pit correction device for the variable cross-section special-shaped pipes as claimed in claim 5, wherein the conformal snap ring (7) is in a structure of two split half rings, and the two split half rings are provided with connecting parts at two ends thereof for bolts and nuts to close and fix the two split half rings.
8. The pit correction device for the variable cross-section special-shaped pipes as claimed in claim 5, wherein the base (6) further comprises two parallel sub-rails (62) which connect the two parallel guide rails (61) and vertically intersect with the guide rails (61), and the sub-rails (62) fix the two guide rails (61).
9. The device for correcting the pits of the variable cross-section special-shaped pipes according to claim 8, wherein the auxiliary rail (62) is provided with scales, and the positions of the two guide rails (61) are recorded through the scales.
10. A method for correcting a pit of a variable cross-section special-shaped pipe, which is implemented by the pit correction device for the variable cross-section special-shaped pipe claimed in one of the claims 1 to 9, and which comprises the following steps:
step 1, placing the special-shaped pipe with the pits in two conformal clamping rings (7) of a fixed clamping seat, enabling the conformal clamping rings (7) to slide on a guide rail (61) of a base (6) and further move to positions matched with the special-shaped pipe, locking two ends of a supporting column (8) with the guide rail (61) and the conformal clamping rings (7) respectively, fixing the positions of the conformal clamping rings (7), and then closing openings of the conformal clamping rings (7) or closing two split half rings;
step 2, selecting matched random ejector blocks according to the radian shape of the inner profile at the pit position of the special-shaped pipe, mounting the two random ejector blocks at the tail end of the rotary ejector rod (4), and then fixing the rotary ejector rod (4) on a piston rod (32) through a threaded connecting piece of a through hole in the rotary ejector rod (4);
step 3, putting the installed hollow jack (3) into a special-shaped pipe, enabling the position of a random ejector block to correspond to the position of a pit, exerting pressure through a manual pump (1) placed outside the special-shaped pipe, enabling a piston rod (32) of the hollow jack (3) to slowly move upwards, enabling the random ejector block to be in contact with the pit, gradually jacking the pit and changing the pit into a smooth molded surface;
step 4, after the pit at one position is corrected, taking out the hollow jack (3), replacing a random jacking block matched with the pit at the other position, then putting the hollow jack (3) into the special-shaped pipe again, and repeating the step 3;
and 5, repeating the step 3 and the step 4, and taking out the special-shaped pipe from the conformal snap ring (7) after the pit is corrected.
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| CN201911193601.8A CN111266436B (en) | 2019-11-28 | 2019-11-28 | Pit shape correction device and method for variable-section special-shaped pipe |
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| CN201911193601.8A CN111266436B (en) | 2019-11-28 | 2019-11-28 | Pit shape correction device and method for variable-section special-shaped pipe |
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| CN111266436B CN111266436B (en) | 2022-03-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114472602A (en) * | 2022-01-27 | 2022-05-13 | 东北林业大学 | Hydraulic shape correction device and method for multi-cavity special-shaped thin-wall section pipe |
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| CN206779194U (en) * | 2017-05-18 | 2017-12-22 | 山西宇彤不锈钢科技有限公司 | A kind of pipeline trimmer |
| CN207839673U (en) * | 2017-09-04 | 2018-09-11 | 淮安市振达钢管制造有限公司 | A kind of device repaired for seamless steel pipe concave surface |
| CN208944876U (en) * | 2018-09-28 | 2019-06-07 | 天津市联通钢管有限公司 | A kind of novel steel pipe surface recess correction obturator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114472602A (en) * | 2022-01-27 | 2022-05-13 | 东北林业大学 | Hydraulic shape correction device and method for multi-cavity special-shaped thin-wall section pipe |
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