Tubular thin-wall part limiting mechanism

Abstract

The invention relates to the technical field of machining, and discloses a tubular thin-wall part limiting mechanism which comprises multiple sections of supporting pieces, the multiple sections of supporting pieces are arranged in a mutually connected mode and extend into a straight line, and each supporting piece comprises a supporting shaft, a rotating shaft and a rotating shaft, the rotating rod is located on the outer side of the supporting shaft and can be unfolded and folded; the outer supporting rod is connected to the outer end of the rotating rod and used for supporting the inner wall of the thin-wall pipe fitting; and the unfolding assembly is connected with the outer supporting rod and is in an arc-shaped outward expanding shape, the unfolding assembly can be attached to different thin-wall pipe fittings in the unfolding state, and the outer side of the unfolding assembly supports the inner walls of the thin-wall pipe fittings. According to the supporting device, the unfolding shaft is pushed, the two half unfolding pieces and the triangular frame plate move outwards, the two half unfolding pieces are attached to the inner wall of the thin-wall pipe fitting, the attaching degree of the two half unfolding pieces and the inner wall of the thin-wall pipe fitting is high, and the supporting effect is high.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a tubular thin-wall part limiting mechanism. Background Art

[0002] Thin-walled pipes have many advantages such as light weight, especially when used in transmission. They can transmit high-temperature fluids, and their light weight also makes them easy to transport.

[0003] Thin-walled pipes need to be clamped before processing. However, due to the relatively low rigidity and large processing allowance of thin-walled pipes, the balance and strength of the clamping force at different clamping points on the surface of thin-walled pipes are particularly important. Therefore, a large clamping force will cause a certain degree of deformation of the thin-walled pipes, while if the clamping force is too small, the pipes cannot be clamped, and a certain degree of vibration will be generated during the processing, affecting the shape and processing degree of the thin-walled pipes.

[0004] For this reason, during the processing of thin-walled pipes, the inside needs to be supported so that the outer wall of the thin-walled pipes can be clamped, the thin-walled pipes can be squeezed, and deformation can be avoided. At the same time, the temperature of the thin-walled pipes will increase during the grinding process, which will release the internal stress and cause certain deformation of the thin-walled pipes. Summary of the invention

[0005] The object of the present invention is to provide a tubular thin-walled part limiting mechanism to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a tubular thin-walled part limiting mechanism, comprising a plurality of support members, wherein the plurality of support members are connected to each other and extend into a straight line, wherein the support members include:

[0007] Support shaft;

[0008] A rotating rod, which is located outside the supporting shaft and can be expanded and retracted;

[0009] An outer support rod, which is connected to the outer end of the rotating rod and is used to support the inner wall of the thin-walled pipe;

[0010] The unfolding component is connected to the outer support rod and is in an arc-shaped outward expansion shape. The unfolding component can fit different thin-walled pipes in the unfolded state, and the outer side of the unfolding component supports the inner wall of the thin-walled pipe.

[0011] Preferably, two ends of the support shaft are respectively provided with a first threaded end and a second threaded end, and the first threaded end and the second threaded end are matched with each other.

[0012] Preferably, a polygonal block is fixed to the middle section of the support shaft, and the outer side of the polygonal block is hinged to the rotating rod;

[0013] The two ends of the polygonal block are respectively provided with a circular butt end and a rotating fastening end, the circular butt end is fixedly arranged with the support shaft, and the axis of the circular butt end coincides with the axis of the support shaft, and when the rotating rod is perpendicular to the support shaft, one side of the circular butt end butts against the rotating rod;

[0014] The rotating fastening end is sleeved on the supporting shaft and is threadedly connected to the supporting shaft. The rotation of the rotating fastening end controls the tilting degree of the rotating rod.

[0015] Preferably, the middle section of the outer support rod is hinged to the outer end of the rotating rod, the outer side of the outer support rod is smoothly arranged, and its outer side supports the inner wall of the thin-walled tube, and the outer side of the outer support rod is always parallel to and fits the inner wall of the thin-walled tube.

[0016] Preferably, two outer grooves are formed on the outer side of the outer support rod, and the two outer grooves extend through the two sides respectively, and the multiple edges of the outer grooves are rounded, and threaded holes are formed on the inner walls of the two outer grooves, and the threaded holes are through-set;

[0017] The unfolding assembly includes unfolding pieces respectively clamped in the outer grooves on both sides, the unfolding pieces are fixed in the outer grooves by bolts, the unfolding pieces are made of metal, and are in a specific elastic arc shape, and the unfolding pieces are supported by the inner wall of the thin-walled pipe.

[0018] Preferably, the outer side of the unfolded piece is flush with the outer side of the outer support rod, and the edge of the unfolded piece is also rounded.

[0019] Preferably, the unfolding sheet is divided into two halves, and the two halves of the unfolding sheet are not in contact with each other. A tripod plate is fixed to the inner sides of the two halves of the unfolding sheet that are close to each other. The cross section of the tripod plate is in an inverted triangle shape and has no deformation effect.

[0020] A mating end is fixed on the inner side of the tripod plate, and an expansion shaft is provided at the lower end of the mating end. The outer end of the expansion shaft is a spherical end, and the spherical end is matched with the mating end. The spherical end can rotate in the mating end. A long cavity is opened on the outer wall of the support shaft, and the inner side of the long cavity is set as a bevel tooth surface. The inner end of the expansion shaft extends into the long cavity, and its inner end is matched with the bevel tooth surface.

[0021] Preferably, the beveled tooth surface is arranged parallel to the axis of the support shaft, and the inner end of the expansion shaft is also arranged with beveled teeth, so that the expansion shaft can only be pushed to one side.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The present invention pushes the expansion axis to move the two half expansion sheets and the tripod plate outward, so that the two half expansion sheets fit the inner wall of the thin-walled pipe. The degree of fit between the two half expansion sheets and the inner wall of the thin-walled pipe is high, and the supporting effect is strong.

[0024] (2) The present invention provides a movable expansion axis to affect the degree of squeezing between the two half expansion sheets and the inner wall of the outer thin-walled pipe in real time. The degree of expansion of the outer support rod is also controlled, so that the support member can be supported in a fitting manner in different thin-walled pipes, thereby achieving multi-adaptability.

[0025] (3) The present invention supports the inner wall of the thin-walled pipe by arranging the outer support rod and the expansion sheet, so that the contact area is large and the deformation of the thin-walled pipe is reduced. Even under the action of stress, the shape of the thin-walled pipe remains relatively unchanged and remains in its original state.

[0026] (4) The present invention extends the support area of ​​the thin-walled pipe to a certain extent through the action of the external support rod. Different external support rods and rotating rods are controlled by a rotating fastening end. The expansion angles of multiple rotating rods are the same, the supporting state of the external support rods is the same, and the extrusion state is also the same, so that the thin-walled pipe can be in a stable state and avoid deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of a support member of the present invention;

[0029] Figure 3 It is a schematic diagram of the support shaft and its external structure of the present invention;

[0030] Figure 4 It is a schematic diagram of the local structure of the outer support rod of the present invention;

[0031] Figure 5 It is a schematic diagram of a partial cross-sectional structure of the support shaft of the present invention;

[0032] Figure 6 This is a schematic diagram of the component structure of the present invention.

[0033] In the figure: 1. support member; 11. support shaft; 12. first threaded end; 13. second threaded end; 2. rotating rod; 21. polygonal block; 22. circular abutment end; 23. rotating fastening end; 3. outer support rod; 31. outer groove; 32. threaded hole; 4. unfolding component; 41. long cavity; 42. oblique tooth surface; 43. unfolding shaft; 44. spherical end; 45. matching end; 46. tripod plate; 47. unfolding sheet. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-6 The present invention provides a technical solution: a tubular thin-walled part limiting mechanism, comprising a multi-section support member 1, the multi-section support member 1 is connected to each other and extends into a straight line, the support member 1 comprises:

[0036] Support shaft 11;

[0037] The rotating rod 2 is located outside the supporting shaft 11 and can be expanded and retracted;

[0038] An outer support rod 3, which is connected to the outer end of the rotating rod 2 and is used to support the inner wall of the thin-walled pipe;

[0039] The unfolding assembly 4 is connected to the outer support rod 3 and is in an arc-shaped outward expansion shape. The unfolding assembly 4 can fit different thin-walled pipes in the unfolded state, and the outer side of the unfolding assembly 4 supports the inner wall of the thin-walled pipe.

[0040] The two ends of the support shaft 11 are respectively provided with a first threaded end 12 and a second threaded end 13, and the first threaded end 12 and the second threaded end 13 are matched with each other, so that the first threaded end 12 can be matched with the adjacent second threaded end 13, extending the length of the support shaft 11 to a certain extent, which is suitable for longer thin-walled pipes. At the same time, it can be easily stored after being disassembled, and the volume is minimized.

[0041] A polygonal block 21 is fixed to the middle section of the support shaft 11. The outer side of the polygonal block 21 is hinged to the rotating rod 2. Multiple planes are arranged on the outer side of the polygonal block 21, which is convenient for the hinge of the rotating rod 2 and for multiple rotating rods 2 to move synchronously at the same time.

[0042] The two ends of the polygonal block 21 are respectively provided with a circular abutment end 22 and a rotation fastening end 23. The circular abutment end 22 is fixedly arranged with the support shaft 11, and the axis of the circular abutment end 22 coincides with the axis of the support shaft 11. When the rotating rod 2 is perpendicular to the support shaft 11, one side of the circular abutment end 22 abuts against the rotating rod 2. The circular abutment end 22 is used to abut against the rotating rod 2, so that the rotating rod 2 can be rotated to the maximum extent to be perpendicular to the support shaft 11, so that the rotating rod 2 can expand outward to the maximum extent. In the absence of maximum expansion, it does not contact the circular abutment end 22, so that the rotating rod 2 is squeezed with the rotation fastening end 23, and at the same time, the outer support rod 3 on the outside is squeezed with the inner wall of the thin-walled pipe fitting;

[0043] The rotating fastening end 23 is sleeved on the support shaft 11 and is threadedly connected to the support shaft 11. The rotation of the rotating fastening end 23 controls the inclination of the rotating rod 2. At the same time, the rotating rod 2 is used for fastening, which is easy to operate and is suitable for thin-walled pipes with different diameters.

[0044] The middle section of the outer support rod 3 is hinged at the outer end of the rotating rod 2. The outer side of the outer support rod 3 is smoothly arranged, and its outer side supports the inner wall of the thin-walled pipe fitting. The outer side of the outer support rod 3 is always parallel to and fits with the inner wall of the thin-walled pipe fitting. The outer support rod 3 fits with the inner wall of the thin-walled pipe fitting, so that the supporting area is increased and the force is relatively uniform, thereby avoiding unnecessary deformation of the thin-walled pipe fitting and maintaining relative balance.

[0045] Two outer grooves 31 are formed on the outer side of the outer support rod 3, and the two outer grooves 31 extend through the two sides respectively, and the multiple edges of the outer grooves 31 are rounded. The inner walls of the two outer grooves 31 are formed with threaded holes 32, and the threaded holes 32 are through-set, and the threaded holes 32 are used for fixing;

[0046] The expansion assembly 4 includes expansion pieces 47 respectively clamped in the outer grooves 31 on both sides. The expansion pieces 47 are fixed in the outer grooves 31 by bolts. The expansion pieces 47 are made of metal and have a specific elastic arc shape. The expansion pieces 47 are supported by the inner wall of the thin-walled pipe.

[0047] The outer side of the expansion piece 47 is flush with the outer side of the outer support rod 3 to avoid a concave-convex setting and to avoid producing unnecessary marks. The edge of the expansion piece 47 is also rounded to facilitate transition and to avoid producing marks on the thin-walled pipe fitting.

[0048] The expansion piece 47 is divided into two parts, and the two halves of the expansion piece 47 do not touch each other. A tripod plate 46 is fixed on the inner side of the two halves of the expansion piece 47 that are close to each other. The cross section of the tripod plate 46 is in the shape of an inverted triangle, and it does not have a deformation effect. It pushes outward to squeeze the two halves of the expansion piece 47 on both sides, so that the two halves of the expansion piece 47 on both sides fit the inner wall of the thin-walled pipe fitting.

[0049] A mating end 45 is fixed to the inner side of the tripod plate 46, and an expansion shaft 43 is provided at the lower end of the mating end 45. The outer end of the expansion shaft 43 is provided with a spherical end 44, and the spherical end 44 is provided with the mating end 45 so that the expansion shaft 43 can be tilted and changed at will for easy adjustment. The spherical end 44 can rotate in the mating end 45. A long cavity 41 is provided on the outer wall of the support shaft 11, and the inner side of the long cavity 41 is provided with a beveled tooth surface 42. The inner end of the expansion shaft 43 extends into the long cavity 41, and its inner end is provided with the beveled tooth surface 42.

[0050] The beveled tooth surface 42 is arranged parallel to the axis of the support shaft 11, and the inner end of the expansion shaft 43 is also arranged with beveled teeth, so that the expansion shaft 43 can only be pushed to one side to achieve a fixing effect.

[0051] In the reset state, the inner end of the expansion shaft 43 is separated from the bevel tooth surface 42, and the expansion shaft 43 is parallel to the support shaft 11. The same rotating rod 2 is also parallel to the support shaft 11. At the same time, different support shafts 11 are separated from adjacent support shafts 11, which is convenient for storing the support member 1 and also convenient for expanding it to cooperate with each other, so that the length of the support shaft 11 is extended.

[0052] When in use, different support shafts 11 are connected to their adjacent support shafts 11 through threads, and then the rotating fastening end 23 is rotated so that the rotating fastening end 23 is arranged perpendicularly to the support shaft 11 for the rotating rod 2 which is parallel to the support shaft 11. The rotating fastening end 23 supports the rotating rod 2, and at the same time, the outer support rod 3 is squeezed against the inner wall of the thin-walled pipe fitting, so that the thin-walled pipe fitting is supported, which is convenient for clamping and processing of the thin-walled pipe fitting. Secondly, the expansion sheet 47 moves outward to squeeze against the thin-walled pipe fitting, and then the expansion shaft 43 is pushed to support the expansion shaft 43. The expansion shaft 43 moves along the oblique tooth surface 42, so that the expansion shaft 43 is relatively supported and opened, and the tripod plate 46 and the expansion sheet 47 are pushed outward to squeeze the two halves of the expansion sheet 47 against the inner wall of the thin-walled pipe fitting.

[0053] When the expansion shaft 43 pushes, the two half expansion pieces 47 and the tripod plate 46 move outward, and the two half expansion pieces 47 arranged in an arc shape squeeze the inner wall of the thin-walled tube, so that the two half expansion pieces 47 fit the inner wall of the thin-walled tube. At the same time, when the tripod plate 46 applies pressure and the outer sides of the two half expansion pieces 47 are limited, the two half expansion pieces 47 fit the inner wall of the thin-walled tube to a high degree, and the supporting effect is strong.

[0054] Secondly, the movable expansion shaft 43, whose inner end is pressed against the bevel tooth surface 42, can be controlled at any time to affect the degree of pressing between the two half expansion pieces 47 and the inner wall of the outer thin-walled pipe in real time, and the fastening end 23 can be rotated continuously to realize control, so that the degree of expansion of the outer support rod 3 is also controlled, so that the support member 1 can be supported in a fitting manner in different thin-walled pipes, and multiple adaptability is realized;

[0055] In addition, the outer support rod 3 and the expansion sheet 47 support the inner wall of the thin-walled pipe, so that the contact area is large, the deformation of the thin-walled pipe is reduced, and the temperature rises during the support process. Even under the action of stress, the shape of the thin-walled pipe remains relatively unchanged and remains in its original state;

[0056] Finally, the outer support rod 3 in the supporting state fits with the inner wall of the thin-walled pipe. Under the action of the outer support rod 3, the thin-walled pipe extends the supporting area to a certain extent, making the support stable. The thin-walled pipes at different positions all support the temperature, and the different outer support rods 3 and rotating rods 2 are all controlled by a rotating fastening end 23. The expansion angles of multiple rotating rods 2 are the same, the supporting state of the outer support rod 3 is the same, and the extrusion state is also the same, so that the thin-walled pipe can be in a stable state and avoid deformation.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tubular thin-walled part limiting mechanism, characterized in that: The invention comprises a plurality of support members (1), wherein the plurality of support members (1) are connected to each other and extend into a straight line. The support member (1) comprises: Support shaft (11); A rotating rod (2), the rotating rod (2) being located outside the supporting shaft (11) and capable of being expanded and retracted; An outer support rod (3), the outer support rod (3) being connected to the outer end of the rotating rod (2) and being used to support the inner wall of the thin-walled pipe; The unfolding component (4) is connected to the outer support rod (3) and is in an arc-shaped outward expansion shape. The unfolding component (4) can fit different thin-walled pipes in the unfolded state, and the outer side of the unfolding component (4) supports the inner wall of the thin-walled pipe.

2. The tubular thin-walled part limiting mechanism according to claim 1, characterized in that: The two ends of the support shaft (11) are respectively provided with a first threaded end (12) and a second threaded end (13), and the first threaded end (12) and the second threaded end (13) are mutually matched.

3. The tubular thin-walled part limiting mechanism according to claim 1, characterized in that: A polygonal block (21) is fixed to the middle section of the support shaft (11), and the outer side of the polygonal block (21) is hingedly connected to the rotating rod (2); The two ends of the polygonal block (21) are respectively provided with a circular abutment end (22) and a rotation fastening end (23); the circular abutment end (22) is fixedly arranged with the support shaft (11), and the axis of the circular abutment end (22) coincides with the axis of the support shaft (11); when the rotating rod (2) and the support shaft (11) are perpendicular, one side of the circular abutment end (22) abuts against the rotating rod (2); The rotating fastening end (23) is sleeved on the support shaft (11) and is threadedly connected to the support shaft (11); the rotation of the rotating fastening end (23) controls the degree of inclination of the rotating rod (2).

4. The tubular thin-walled part limiting mechanism according to claim 1, characterized in that: The middle section of the outer support rod (3) is hinged to the outer end of the rotating rod (2); the outer side of the outer support rod (3) is smoothly arranged, and the outer side supports the inner wall of the thin-walled tube; the outer side of the outer support rod (3) is always parallel to and in contact with the inner wall of the thin-walled tube.

5. The tubular thin-walled part limiting mechanism according to claim 1, characterized in that: Two outer grooves (31) are formed on the outward side of the outer support rod (3), and the two outer grooves (31) extend through the two sides respectively, and the multiple edges of the outer grooves (31) are rounded, and threaded holes (32) are formed on the inner walls of the two outer grooves (31), and the threaded holes (32) are through-set; The expansion assembly (4) comprises expansion pieces (47) respectively clamped in the outer grooves (31) on both sides, the expansion pieces (47) being fixed in the outer grooves (31) by bolts, the expansion pieces (47) being made of metal and being in a specific elastic arc shape, and the expansion pieces (47) being supported by the inner wall of the thin-walled pipe.

6. The tubular thin-walled part limiting mechanism according to claim 5, characterized in that: The outer side of the expansion piece (47) is arranged flush with the outer side of the outer support rod (3), and the edge of the expansion piece (47) is also arranged in a rounded shape.

7. The tubular thin-walled part limiting mechanism according to claim 5, characterized in that: The unfolding sheet (47) is divided into two halves, and the two halves of the unfolding sheet (47) are not in contact with each other. A tripod plate (46) is fixed to the inner sides of the two halves of the unfolding sheet (47) that are close to each other. The cross section of the tripod plate (46) is in the shape of an inverted triangle and has no deformation effect. A mating end (45) is fixed on the inner side of the tripod plate (46), and an expansion shaft (43) is provided at the lower end of the mating end (45). The outer end of the expansion shaft (43) is provided in the form of a spherical end (44), and the spherical end (44) is provided in cooperation with the mating end (45). The spherical end (44) can rotate in the mating end (45). A long cavity (41) is provided on the outer wall of the support shaft (11), and the inner side of the long cavity (41) is provided in the form of an oblique tooth surface (42). The inner end of the expansion shaft (43) extends into the long cavity (41), and the inner end thereof is provided in cooperation with the oblique tooth surface (42).

8. The tubular thin-walled component limiting mechanism according to claim 7, characterized in that: The beveled tooth surface (42) is arranged parallel to the axis of the support shaft (11), and the inner end of the expansion shaft (43) is also arranged in the form of beveled teeth, so that the expansion shaft (43) can only be pushed to one side.

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