CN112872109A - Shaping device for special-shaped pipes - Google Patents
Shaping device for special-shaped pipes Download PDFInfo
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- CN112872109A CN112872109A CN202110154472.2A CN202110154472A CN112872109A CN 112872109 A CN112872109 A CN 112872109A CN 202110154472 A CN202110154472 A CN 202110154472A CN 112872109 A CN112872109 A CN 112872109A
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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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- 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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
The invention discloses a shaping device of a special-shaped pipe, which comprises a base, a sliding rail, a sliding block, a fixed bracket, a fixed die, a pressing die and a hydraulic jack. The straightness of the pipe shaped by the shaping device of the special-shaped pipe can reach less than or equal to 0.2mm/m, and the precision of the shaped straightness is higher than that of the pipe straightened by a high-precision straightening machine.
Description
Technical Field
The invention relates to the technical field of steel pipe straightening and shaping equipment, in particular to a shaping device for a special-shaped pipe.
Background
With the deep development of society, nuclear energy as clean energy occupies a greater and greater proportion in the future social development; the ITER project is used as an international large scientific project for solving future energy of human beings, and China participates actively. The armor part for the PF conductor armor is a special-shaped pipe with an inner square and an outer circle; in the field of ocean engineering, the special-shaped pipe is widely used for various structural members, tools and mechanical parts. Compared with a round pipe, the stainless steel special pipe generally has larger inertia moment and section modulus, has larger bending resistance and torsion resistance, can greatly reduce the structural weight and save steel. The special-shaped pipe has many advantages, the difficulty of production and manufacturing is high, the design of a mould in the production and manufacturing process is difficult, and the influence of the size of the special-shaped pipe needs to be considered; the strength of the material itself and the associated physical properties are also considered.
With the deep development of nuclear energy, the special-shaped pipes (square round pipes, hexagonal pipes, octagonal pipes and the like) are more and more widely used in the fields of energy, ocean engineering and the like, the advantages of the special-shaped pipes are more and more exerted, the use environment is more and more rigorous, the requirements on the dimensional accuracy (particularly the straightness (local straightness, full length straightness) and the torsion resistance) are more and more high, and higher requirements and greater challenges are provided for the production of the special-shaped pipes. In order to meet the special requirements of users, make better special-shaped pipes and improve the shaping efficiency of the special-shaped pipes, it is necessary to develop a shaping device suitable for the special-shaped pipes.
Chinese patent CN201510866786.X discloses a single-spiral heterotypic seamless steel tube straightening device and method for rocket cannons, in order to solve the problem that the production efficiency and the yield of the present single-spiral heterotypic seamless steel tube for rocket cannons are lower, the device comprises a steel tube protective sleeve and a spot pressing mechanical device, the steel tube protective sleeve is sleeved on the steel tube, and the spot pressing mechanical device comprises a fixed housing, a hydraulic jack, a steel tube support frame, a first pressing die, a second pressing die and a third pressing die. The technical scheme that this patent provided has now the alignment of single spiral abnormal shape seamless steel pipe for the rocket gun, has improved yield and production efficiency, can protect the steel pipe surface at the steel pipe point pressure straightening in-process moreover, avoids pressing the steel pipe surface indent and pressing the steel pipe spiral groove deformation. This patent is fixed the steel pipe through setting up two fixed first moulding-dies and second moulding-dies on the steel pipe support frame, then the alignment is exerted pressure to the deformation position on the steel pipe through the third moulding-die that is located between first moulding-die and the second moulding-die, because of the fixed unadjustable of distance between first moulding-die and the second moulding-die, to the steel pipe of different deformation degree, this kind of fixed mode to steel pipe deformation position both sides adoption fixed distance, can lead to the steel pipe aligning back precision not high, the secondary bending deformation's condition can take place even. On the other hand, the hydraulic jack of the straightening device is used for straightening the steel pipe by applying pressure to the deformed steel pipe in the vertical direction, so that the deformed steel pipe needs to be lifted to a fixed platform with a certain height, and the hydraulic jack is labor-consuming and inconvenient to operate when the weight of the steel pipe is heavy; on the other hand, because the steel pipe bears the straightening force in the vertical direction, the straightening device has certain gravity acting force, and the gravity acting force is applied to the steel pipe, so that the acting force actually applied to the steel pipe cannot be accurately controlled, and the precision of the straightened steel pipe is further influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a shaping device for a special-shaped pipe.
In order to solve the problems, the invention adopts the following technical scheme:
a shaping device for special-shaped pipes comprises:
a base;
the sliding rail is fixedly arranged on the base;
two sliding blocks; the sliding block is arranged on the sliding rail in a straddling mode and can slide along the sliding rail;
the number of the fixed brackets is two; one end of one fixing bracket is fixedly connected with one slide
On the block;
two fixed moulds; a fixed mold cavity is formed in the fixed mold; each fixed mould is composed of a first fixed mould and a second fixed mould which can be mutually assembled; the first fixed die is connected to the other end of the fixed die;
a press die composed of two first press dies and a second press die which can be assembled with each other; a pressing die cavity is formed in the pressing die; the die cavity and the fixed die cavity have the same shape and size; and
the hydraulic jack comprises a hydraulic cylinder support, a hydraulic cylinder and a telescopic rod which are connected with each other; the hydraulic cylinder support is fixedly connected to the base; one end of the telescopic rod is connected with the first pressing die; the hydraulic jack is located between the two fixing supports.
Preferably, a first slot is formed in the lower end face of the fixed support; and a first plug matched and clamped with the first slot is arranged on the upper end faces of the first fixed die and the second fixed die.
Preferably, the fixing device further comprises a baffle, a second slot is formed in the lower end face of the fixing support, and a second plug matched and clamped with the second slot is formed in the upper end face of the baffle; the side surface of the baffle is abutted against the side surface of the fixed die.
Preferably, the baffle and the second slot are provided with a plurality of baffles, and the side surfaces of two adjacent baffles are abutted.
Preferably, the first slot and the second slot are dovetail slots.
Preferably, the baffle is a nylon baffle.
Preferably, the press mold is a nylon press mold or a stainless steel press mold.
Preferably, the die cavity and the stent cavity are hexagonal or octagonal or circular.
Preferably, the straightening device further comprises a straightening auxiliary rod, wherein a first side surface of the straightening auxiliary rod is a plane or an arc surface, a sliding groove is formed in a second side surface, opposite to the first side surface, of the straightening auxiliary rod, two nonmagnetic sliding blocks are arranged in the sliding groove, and a threaded sleeve and a screw rod in threaded connection with the threaded sleeve are arranged on the nonmagnetic sliding blocks.
Preferably, a magnetic sliding block is further arranged in the sliding groove and is located between the two nonmagnetic sliding blocks; and a magnetic strip is arranged on the inner wall of the first pressing die.
Compared with the prior art, the invention has the technical effects that:
the fixed support used for connecting the fixed supports of the shaping device of the special-shaped pipe can freely move along with the movement of the sliding block on the sliding rail, so that the distance between the two fixed supports, namely the two fixed supports, can be adjusted, the pressing die acting on the deformed part of the special-shaped pipe is positioned between the two fixed supports, the distance between the two fixed supports can be adjusted in a targeted manner according to the deformation degree of the special-shaped pipe, the precision of the straightened pipe can be improved, and the secondary bending deformation can be avoided.
In addition, the shaping device of the special-shaped pipe realizes the straightening operation of the pipe by applying horizontal acting force to the deformed part of the special-shaped pipe, and the special-shaped pipe only needs to be fixed in a fixing die on a base, so that the operation is more convenient; and the straightening force applied in the horizontal direction can avoid the influence of the self gravity of the shaping device on the special-shaped pipe, and further improve the precision of the pipe after being straightened.
The straightness of the pipe shaped by the shaping device of the special-shaped pipe can reach less than or equal to 0.2 mm/m; the straightness accuracy after shaping is higher than that after straightening by a high-accuracy straightener (GB/T13296 specifies that the straightness of a cold-rolled steel pipe (circular pipe) is less than or equal to 1.5mm/m, and GB/T14976 specifies that the wall thickness is less than or equal to 15mm, the straightness is less than or equal to 1.5mm/m, the wall thickness is more than 15mm, and the straightness is less than or equal to 2.0 mm/m).
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to the specific details set forth above, and that these and other objects that can be achieved with the present invention will be more clearly understood from the detailed description that follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. Many aspects of the invention will be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present invention. In the drawings:
fig. 1 is a schematic top view of a shaping device for a special-shaped pipe provided in embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of section A-A of FIG. 1;
FIG. 3 is a schematic structural view of section B-B of FIG. 1;
FIG. 4 is a schematic structural view of a straightening auxiliary bar provided in embodiment 2 of the present invention;
FIG. 5 is a schematic structural view of a straightening auxiliary rod installed inside a special-shaped pipe according to embodiment 2 of the present invention.
In the figure, 1, a base, 2, a sliding rail, 3, a sliding block, 4, a fixed support, 5, a fixed mold, 6, a pressing mold, 7, a hydraulic jack, 8, a baffle, 9, a pipe, 10, a straightening auxiliary rod, 401, a first slot, 402, a second slot, 501, a first fixed mold, 502, a second fixed mold, 503, a fixed mold cavity, 504, a first plug, 601, a first pressing mold, 602, a second pressing mold, 603, a pressing mold cavity, 701, a hydraulic cylinder support, 702, a hydraulic cylinder, 703, a telescopic rod, 801, a second plug, 1001, a first side, 1002, a second side, 1003, a sliding block, a sliding chute, 1004, a nonmagnetic material, 1005, a threaded sleeve, 1006, a threaded rod, 1007, a magnetic sliding block, 6011 and a magnetic strip.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that, in order to avoid obscuring the present invention with unnecessary detail, only the structures and/or process steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so related to the present invention are omitted.
In addition, it should be noted that, in the embodiments of the present invention, the term "connected" may be a straight connection or an indirect connection with an additional connecting member in between, unless otherwise specified. In addition, the terms "upper", "lower", "left" and "right" are only based on the positions shown in the drawings, and do not limit the present invention in order to more clearly describe the connection relationship of the components in the drawings.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts, or the same or similar steps.
Example 1
The embodiment 1 of the invention provides a shaping device for a special-shaped pipe, which is structurally shown in fig. 1, 2 and 3. A shaping device for special-shaped pipes comprises a base 1, a slide rail 2, a slide block 3, a fixed support 4, a fixed mold 5, a pressing mold 6 and a hydraulic jack 7. The slide rail 2 is fixedly arranged on the base 1; the number of the sliding blocks 3 is two, the two sliding blocks 3 are arranged on the left end and the right end of the sliding rail 2 in a straddling mode, and the sliding blocks 3 can slide left and right along the sliding rail 2; the number of the fixed supports 4 is two, and one end of one fixed support 4 is fixedly connected to one sliding block 3; the number of the fixed moulds 5 is two, and fixed mould cavities 503 are arranged in the fixed moulds 5; each fixed mould 5 is composed of a first fixed mould 501 and a second fixed mould 502 which can be assembled with each other, and the first fixed mould 501 and the second fixed mould 502 can be two half moulds with symmetrical structures; a first fixed die 501 is attached to the other end of the fixed die 4; the press die 6 is composed of a first press die 601 and a second press die 602 which can be assembled with each other, and the first press die 601 and the second press die 602 can be two structurally symmetrical half dies; a die cavity 603 is formed in the die 6; the shape and the size of the die cavity 603 are the same as those of the fixed die cavity 503, and the shape and the size of the die cavity 603 and the fixed die cavity 503 are matched with the shape and the size of the special-shaped pipe 9 to be straightened; the hydraulic jack 7 comprises a hydraulic cylinder support 701, a hydraulic cylinder 702 and an expansion rod 703 which are connected with each other; the hydraulic cylinder support 701 is fixedly connected to the base 1; one end of the telescopic rod 703 is connected with a first pressing die 601; the hydraulic jack 7 is located between the two fixed brackets 4 so that the pressing die 6 is located between the two fixed brackets 5.
The shapes of the die cavity 603 and the fixed die cavity 503 of the embodiment of the invention can be designed according to the shape of the special-shaped pipe 9 to be straightened, and can be designed into a hexagon, an octagon, a circle and the like, and the hexagon cavity is taken as an example in the drawing of the embodiment.
When the shaping device for the special-shaped pipe is used, the part, needing to be straightened, of the hexagonal pipe 9, which is locally bent is exposed in the action range of the pressing die 6, the distance between the two fixed dies 5 on the left side and the right side is adjusted according to the bending deformation degree of the hexagonal pipe 9, namely, the positions of the two fixed dies 4 on the left side and the right side relative to the bent part of the hexagonal pipe 9 are adjusted by utilizing the left-right sliding of the sliding block 3 on the sliding rail 2. After the distance between the two fixed dies 5 is determined, the hexagonal tube material 9 to be straightened is passed through and fixed along the openings of the two fixed dies 5, namely the fixed die cavities 503, at this time, the first fixed die 501 is fixedly connected on the fixed die 4, and the second fixed die 502 and the first fixed die 501 can be fixed on the base 1 by screws after being assembled. After the hexagonal pipe is firmly fixed, the second pressing die 602 is fixed on one side of the hexagonal pipe, the second pressing die 602 can be fixed on the base 1 through screws, then a starting button of the hydraulic cylinder 702 is pressed, the hydraulic cylinder 702 drives the telescopic rod 703 to stretch forward and retract, and then the first pressing die 601 is driven to apply pressure to the bent part of the hexagonal pipe until the bent part of the hexagonal pipe 9 is straightened.
The fixed support 4 used for connecting the fixed support 5 of the shaping device of a heterotypic tubular product of the invention can move freely along with the movement on the slide rail 2 of the slide block 3, and then can adjust two fixed supports 4, namely the distance between two fixed supports 5, the die-pressing 6 acting on the deformed position of the heterotypic tubular product 9 is located between two fixed supports 5, can adjust the distance between two fixed supports 5 pertinently according to the deformation degree of the heterotypic tubular product 9, can improve the precision after the straightening of the tubular product 9, avoid the emergence of the secondary bending deformation situation.
In addition, the shaping device of the special-shaped pipe realizes the straightening operation of the pipe 9 by applying horizontal acting force to the deformed part of the special-shaped pipe 9, the special-shaped pipe 9 only needs to be fixed in the fixed die 5 positioned on the base 1, the special-shaped pipe 9 does not need to be lifted to a higher height position for fixing, and the operation is more convenient; and the straightening force applied in the horizontal direction can avoid the influence of the self gravity of the shaping device on the special-shaped pipe 9, and further improve the precision of the pipe after being straightened. On the other hand, after the special-shaped pipe 9 is straightened, the special-shaped pipe 9 can be conveniently transferred to the platform of the base 1 from the shaping device only by opening the fixed die 5, and the subsequent straightness measurement is completed on the platform of the base 1, so that the operation is time-saving and labor-saving.
The straightness of the pipe shaped by the shaping device of the special-shaped pipe can reach less than or equal to 0.2 mm/m; the straightness accuracy after shaping is higher than that after straightening by a high-accuracy straightener (GB/T13296 specifies that the straightness of a cold-rolled steel pipe (circular pipe) is less than or equal to 1.5mm/m, and GB/T14976 specifies that the wall thickness is less than or equal to 15mm, the straightness is less than or equal to 1.5mm/m, the wall thickness is more than 15mm, and the straightness is less than or equal to 2.0 mm/m).
The shaping device of the special-shaped pipe mainly utilizes the principle of combination of pressing (pulling) and bending in material mechanics: the two fixed dies 5 (i.e., the supporting points) are under tensile stress, and play a role of support; the tubes 9 at the position of the fixed die 5 are together under tensile stress; the pressing die 6 is under the action of the hydraulic jack 7 and is under compressive stress; according to the principle of two points and one straight line, when the bending part of the pipe 9 is not in the range of one straight line, the bending part of the pipe 9 is straightened under the action of the pressure stress of the hydraulic jack 7 and is kept in the range of one straight line with the pipe 9 at the position of the two fixed dies 5.
Preferably, a first slot 401 is formed on the lower end surface of the fixing bracket 4; the first fixed mold 501 and the second fixed mold 502 are provided with a first plug 504 on the upper end surface thereof for fitting and engaging with the first socket 401. Therefore, the first fixed die 501 and the fixed bracket 4 are movably connected in a plugging way, the connection way is simple, the quick connection is convenient, and the type of the first fixed die 501 connected on the fixed bracket 4 is convenient to change according to the appearance of the special-shaped pipe 9 to be straightened; the second fixed mold 502 is movably connected with the fixed support 4 in a plugging manner, and the first fixed mold 501 and the second fixed mold 502 are simultaneously connected with the fixed support 4, so that the integral integrity and stability of the first fixed mold 501 and the second fixed mold 502 after the molds are closed can be kept, and the pipe 9 can be fixed more firmly. After the upper end surfaces of the first fixed die 501 and the second fixed die 502 are engaged with the lower end surface of the fixed die 4, the lower end surface of the integral fixed die 5 formed after assembly is abutted against the base 1.
Preferably, the first pressing die 601 is movably connected with the telescopic rod 703, so that the type of the first pressing die 601 connected with the telescopic rod 703 can be changed conveniently according to the appearance of the special-shaped pipe 9 to be straightened.
Preferably, the shaping device for the special-shaped pipe in the embodiment of the invention further comprises a baffle 8, and the baffle 8 can be a nylon baffle. A second slot 402 is formed in the lower end face of the fixed support 4, and a second plug 801 matched and clamped with the second slot 402 is formed in the upper end face of the baffle plate 8; after the baffle 8 is inserted into the fixed bracket 4, the lower end face of the baffle 8 abuts against the base 1, and the side face of the baffle 8 abuts against the side face of the fixed bracket 5, so that when the pipe 9 in the fixed bracket 5 is subjected to the compressive stress of the hydraulic jack 7, the baffle 8 can play a role in reinforcing and supporting the fixed bracket 5.
Preferably, a plurality of baffle plates 8 and a plurality of second slots 402 are provided, the side surfaces of two adjacent baffle plates 8 are abutted, and as shown in fig. 3, three baffle plates 8 are additionally arranged on the left and right sides of the fixed die 5 in fig. 3. In particular, the number of baffles 8 is mainly determined by the bending degree of the tube 9, for example, four baffles 8 are generally used for the tube 9 with the S-shaped bending, so as to achieve better supporting and fixing effects; if there is only one bend in the tube 9, it is generally reinforced with two baffles 8. In addition, the pipe 9 is made of different materials, so that the strength of the pipe 9 is different, and the number of the baffle plates 8 can be increased according to actual conditions for better supporting and fixing effects.
Preferably, the first slot 401 and the second slot 402 are dovetail slots. The inserting structure designed by the dovetail groove is high in matching precision, and the structure is stable and firm after inserting.
Preferably, the pressing die 6 can be designed and manufactured according to the shape, specification and size of the pipe 9 to be shaped and the pipe material, and the pressing die 6 can be manufactured by selecting common materials in the markets such as nylon, stainless steel and the like according to the material characteristics of the shaping pipe 9. The contact part of the surface of the pipe 9 shaped by the nylon pressing die and the pressing die has no phenomena of indentation and scratch. The size of the pressing die 6, mainly the unit length covered on the pipe 9, can be reasonably selected, so that secondary bending is avoided.
The shaping device for the special-shaped pipe is simple, convenient and flexible, can adjust the shapes of the fixed die 5 and the pressing die 6 according to requirements, and is convenient for shaping various special-shaped pipes (such as square round pipes, hexagonal pipes, octagonal pipes and the like). In addition, the device can adjust the width of the pressing die 6, the number of the supporting baffles 8 and the strength of the hydraulic jack 7 according to actual conditions, and can perform local shaping and full-length shaping on the pipe. Especially for the local bending part of the pipe, the shaping effect is obvious, the phenomenon of straightening blind areas in the production process of the pipe is solved, and the production yield of the pipe can be improved.
The device is simple and convenient to operate, and the hydraulic jack 7 applies the shaping force to the pipe 9 at the required shaping part, so that the consumption of manual force is saved; the device can be operated by one person, is convenient, and saves labor cost.
According to the device, the width (unit length) of the pressing die 6, the stress position of the hydraulic jack 7 and the number and positions of the supporting baffles 8 are adjusted, so that the pipe 9 can be shaped in straightness, the external dimension and the internal dimension of the pipe are unchanged, the straightness of the pipe 9 is guaranteed to reach the standard, and the phenomenon that the pipe 9 is unqualified for two times (other indexes such as external diameter and internal diameter) is avoided.
When the shaping device for the special-shaped pipe is used for straightening the pipe, the method can be specifically carried out according to the following steps:
the first step is as follows: the inspection preparation of the incoming pipe is to measure the outer diameter of the incoming pipe on a measuring platform (to facilitate the selection of the sizing dies 6 and the fixed dies 5 with proper sizes), measure the bending (to facilitate the determination of the position between the two fixed dies 5 and the use of the number of the baffle plates 8), verify whether the local straightness or the full-length straightness needs to be processed, confirm the material mark thereof, and the like.
The second step is that: from the data measured in the first step, the number of baffles 8 to be used is determined (typically double by a factor of 2, 4 …) and the distance between the two fixed dies 5 is adjusted.
The third step: according to the requirements of the first step and the second step, a reasonable shaping die 6 is selected, and the unit length covered on the pipe by the shaping die 6 (namely the width of the die 6) and the material of the die 6 are mainly considered.
The fourth step: according to the previous preparation, the pipe to be shaped is placed on the shaping device and fixed, and the hydraulic jacks 7 are activated to apply a force to the pipe to be shaped. According to the magnitude of the applied force, the deformation condition of the pipe after stress and shaping can be observed, the over-correction condition can be properly caused, and the size of the deformed part of the pipe 9 is still in a reasonable range after the deformed part rebounds.
The fifth step: taking the orthopedic pipe off the shaping device, placing the orthopedic pipe into a measuring platform on the edge, and measuring the straightness, wherein if the straightness meets the requirement, the rectification implementation process is completed; if not, the steps are repeated to carry out reshaping again.
Example 2
When the pipe wall of the special-shaped pipe 9 to be straightened is thin, the deformed part of the special-shaped pipe 9 is easy to generate unreasonable over-straightening under the pressure action of the hydraulic jack 7, the special-shaped pipe 9 is subjected to secondary deformation due to the over-straightening, and the straightness of the pipe 9 can be straightened to be within the qualified range only through repeated straightening operations. Based on the fact that the special-shaped pipes 9 are all made of nonmagnetic austenitic stainless steel materials, on the basis of the special-shaped pipe shaping device provided by the embodiment 1 of the invention, the special-shaped pipe shaping device further comprises a straightening auxiliary rod 10, and the structure is shown in fig. 4 and 5. A first side surface 1001 of the straightening auxiliary rod 10 is a plane or an arc surface, a second side surface 1002 of the straightening auxiliary rod 10 opposite to the first side surface 1001 is provided with a sliding groove 1003, two nonmagnetic sliding blocks 1004 are arranged in the sliding groove 1003, and each nonmagnetic sliding block 1004 is provided with a threaded sleeve 1005 and a screw 1006 in threaded connection with the threaded sleeve 1005.
The special-shaped pipe 9 is generally a hollow pipe, and the cross section of the hollow structure formed in the special-shaped pipe is generally polygonal or circular. In the embodiment of the present invention, a hexagonal pipe is taken as an example, and the cross-sectional shape of the hollow structure formed therein is still hexagonal, as shown in fig. 5. After the hexagonal pipe is placed and fixed in the shaping device of embodiment 1 of the present invention, the straightening auxiliary rod 10 is inserted into the hexagonal pipe from the hexagonal cavity at the end of the hexagonal pipe, the length of the straightening auxiliary rod 10 is not less than the length of the hexagonal pipe, and the first side surface 1001 of the straightening auxiliary rod 10 (in this case, the first side surface 1001 is a planar structure) is made to closely adhere to the inner wall of the deformed surface of the hexagonal pipe, and then the straightening auxiliary rod 10 is fixed in the hexagonal cavity of the hexagonal pipe by the nonmagnetic sliding blocks 1004 at the left and right ends of the straightening auxiliary rod. Specifically, the two nonmagnetic sliding blocks 1004 are slid in the sliding grooves 1003 to enable the two nonmagnetic sliding blocks 1004 to be located at two end portions of the hexagonal tube, and then the protruding length of the screw 1006 is changed by adjusting the depth of the screw 1006 screwed into the screw sleeve 1005, so that the other end of the screw 1006 is just abutted to the inner wall of the cavity in the hexagonal tube opposite to the first side surface 1001, and the straightening auxiliary rod 10 can be fixed in the hexagonal tube. When the hydraulic jack 7 is used for applying extrusion force to the deformation surface of the hexagonal pipe, the first side surface 1001 of the straightening auxiliary rod 10 is tightly attached to the inner side of the deformation surface to support the inner wall of the hexagonal pipe, so that the unreasonable excessive straightening condition can be avoided, and the shaping efficiency of the special-shaped pipe 9 is improved.
If the cross section of the hollow structure formed in the special-shaped pipe 9 is circular, such as a square round pipe, only the first side surface 1001 of the straightening auxiliary rod 10 needs to be designed into an arc-shaped surface, so that the first side surface 1001 of the straightening auxiliary rod 10 can be tightly attached to the inner wall of the special-shaped pipe 9.
As a further improvement of the embodiment of the present invention, a magnetic sliding block 1007 is further disposed in the sliding slot 1003 of the straightening auxiliary rod 10, and the magnetic sliding block 1007 is located between the two non-magnetic sliding blocks 1004; and accordingly, a magnetic stripe 6011 is provided on an inner wall of the first stamper 601. Thus, after the straightening auxiliary rod 10 is fixed to the inner wall of the special-shaped pipe 9 through the non-magnetic sliding blocks 1004 at the two ends of the straightening auxiliary rod, the magnetic sliding block 1007 can be dragged to the deformation part of the special-shaped pipe 9 along the sliding groove 1003 through an external magnetic body, then extrusion force is applied to the deformation part of the special-shaped pipe 9 through the hydraulic jack 7, at the moment, the magnetic strip 6011 is also arranged on the inner wall of the first pressing die 601 connected with the hydraulic jack 7, the deformation part of the special-shaped pipe 9 is not only subjected to the extrusion force of the hydraulic jack, but also subjected to the magnetic extrusion force between the magnetic strip 6011 and the magnetic sliding block 1007, stronger reverse supporting force can be provided for the deformation part of the special-shaped pipe 9, unreasonable over-straightening conditions are further avoided, and the shaping efficiency of the special-shaped pipe 9.
The straightening auxiliary rod 10 provided by the embodiment of the invention has universality, is suitable for straightening operation of special-shaped pipes 9 with different lengths, and can adjust the positions of the nonmagnetic sliding blocks 1004 at two ends of the sliding groove 1003 according to the length of the special-shaped pipe 9 during use, so that the distance between the two nonmagnetic sliding blocks 1004 is matched with the length of the special-shaped pipe 9. The straightening auxiliary rod 10 provided by the embodiment of the invention is also suitable for special-shaped pipes 9 with different pipe diameters, and the depth of the screw 1006 screwed into the screw sleeve 1005 can be adjusted according to the pipe diameter of the special-shaped pipe 9 so as to change the protruding length of the screw 1006, so that the protruding length of the screw 1006 is matched with the pipe diameter of the special-shaped pipe 9.
The present invention is not limited to the above-described specific embodiments, and various modifications and variations are possible. Any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. A shaping device for special-shaped pipes is characterized by comprising:
a base;
the sliding rail is fixedly arranged on the base;
two sliding blocks; the sliding block is arranged on the sliding rail in a straddling mode and can slide along the sliding rail;
the number of the fixed brackets is two; one end of one fixing bracket is fixedly connected with one slide
On the block;
two fixed moulds; a fixed mold cavity is formed in the fixed mold; each fixed mould is composed of a first fixed mould and a second fixed mould which can be mutually assembled; the first fixed die is connected to the other end of the fixed die;
a press die composed of two first press dies and a second press die which can be assembled with each other; a pressing die cavity is formed in the pressing die; the die cavity and the fixed die cavity have the same shape and size; and
the hydraulic jack comprises a hydraulic cylinder support, a hydraulic cylinder and a telescopic rod which are connected with each other; the hydraulic cylinder support is fixedly connected to the base; one end of the telescopic rod is connected with the first pressing die; the hydraulic jack is located between the two fixing supports.
2. The shaping device of a special-shaped pipe according to claim 1, wherein a first slot is formed on the lower end surface of the fixing support; and a first plug matched and clamped with the first slot is arranged on the upper end faces of the first fixed die and the second fixed die.
3. The shaping device of the special-shaped pipe according to claim 2, further comprising a baffle, wherein a second slot is formed in the lower end face of the fixing support, and a second plug which is matched and clamped with the second slot is formed in the upper end face of the baffle; the side surface of the baffle is abutted against the side surface of the fixed die.
4. The shaping device of claim 3, wherein the baffles and the second slots are provided in plurality, and the side surfaces of two adjacent baffles abut against each other.
5. The shaping device of claim 4, wherein the first slot and the second slot are dovetail slots.
6. The shaping device of claim 5, wherein the baffle is a nylon baffle.
7. The shaping device of claim 6, wherein the die is a nylon die or a stainless steel die.
8. The shaping device of a special-shaped pipe according to any one of claims 1 to 7, wherein the die cavity and the fixed die cavity are hexagonal, octagonal or circular.
9. The shaping device of the special-shaped pipe according to any one of claims 1 to 7, further comprising a straightening auxiliary rod, wherein a first side surface of the straightening auxiliary rod is a plane or an arc surface, a second side surface of the straightening auxiliary rod opposite to the first side surface is provided with a sliding groove, two nonmagnetic sliding blocks are arranged in the sliding groove, and each nonmagnetic sliding block is provided with a threaded sleeve and a screw rod in threaded connection with the threaded sleeve.
10. The shaping device of a special-shaped pipe according to claim 9, wherein a magnetic sliding block is further arranged in the sliding groove, and the magnetic sliding block is positioned between the two non-magnetic sliding blocks; and a magnetic strip is arranged on the inner wall of the first pressing die.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110154472.2A CN112872109B (en) | 2021-02-04 | 2021-02-04 | Shaping device for special-shaped pipe |
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|---|---|---|---|
| CN202110154472.2A CN112872109B (en) | 2021-02-04 | 2021-02-04 | Shaping device for special-shaped pipe |
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| CN112872109B CN112872109B (en) | 2023-05-16 |
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| EP1214990A2 (en) * | 2000-12-15 | 2002-06-19 | Cesare Galdabini S.p.A. | Machine and process for straightening pieces of small cross section and great length |
| CN204018435U (en) * | 2014-09-01 | 2014-12-17 | 中国石油集团渤海石油装备制造有限公司 | A kind of steel pipe aligning internal support device |
| CN109226362A (en) * | 2018-09-28 | 2019-01-18 | 天津市联通钢管有限公司 | A kind of novel steel pipe surface recess correction obturator |
| CN110842505A (en) * | 2019-11-19 | 2020-02-28 | 燕山大学 | Dismounting device for micro-casting rolling additive manufacturing of large special-shaped pipe |
| CN210701788U (en) * | 2019-09-24 | 2020-06-09 | 福建聚光精密件制造有限公司 | Novel horizontal straightening machine for special-shaped copper materials |
| CN212019005U (en) * | 2020-03-12 | 2020-11-27 | 中国电建市政建设集团有限公司 | Convenient bending steel pipe straightening tool |
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2021
- 2021-02-04 CN CN202110154472.2A patent/CN112872109B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1214990A2 (en) * | 2000-12-15 | 2002-06-19 | Cesare Galdabini S.p.A. | Machine and process for straightening pieces of small cross section and great length |
| CN204018435U (en) * | 2014-09-01 | 2014-12-17 | 中国石油集团渤海石油装备制造有限公司 | A kind of steel pipe aligning internal support device |
| CN109226362A (en) * | 2018-09-28 | 2019-01-18 | 天津市联通钢管有限公司 | A kind of novel steel pipe surface recess correction obturator |
| CN210701788U (en) * | 2019-09-24 | 2020-06-09 | 福建聚光精密件制造有限公司 | Novel horizontal straightening machine for special-shaped copper materials |
| CN110842505A (en) * | 2019-11-19 | 2020-02-28 | 燕山大学 | Dismounting device for micro-casting rolling additive manufacturing of large special-shaped pipe |
| CN212019005U (en) * | 2020-03-12 | 2020-11-27 | 中国电建市政建设集团有限公司 | Convenient bending steel pipe straightening tool |
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| CN112872109B (en) | 2023-05-16 |
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