Multi-point constant-force pressing and positioning device for circular turning of special-shaped pipe fitting

Abstract

A multi-point constant-force pressing and positioning device for circular turning of special-shaped pipe fittings comprises a connecting disc, a balancing weight, a positioning pin and an L-shaped clamp base plate are arranged at the right end of the connecting disc, and a linkage balance force clamping mechanism and a first positioning mechanism are arranged on the clamp base plate; the linkage balance force clamping mechanism comprises a first fixing base, a second fixing base, a rotating pull rod, a pressing nut, a rotating pressing plate, a transition base, a balance component force rod and a component force clamping block, the first fixing base and the second fixing base are detachably fixed to the inner side of the clamp base plate, one end of the rotating pull rod is hinged to the first fixing base, and the other end of the rotating pull rod is hinged to the second fixing base. The other end of the rotating pull rod is provided with a compression nut, one end of the rotating pressing plate is hinged to the second fixed base, the other end of the rotating pressing plate is provided with an installation groove corresponding to the rotating pull rod, the transition base is detachably fixed to the inner side of the rotating pressing plate, and the middle of the balance component force rod is hinged into the transition base. According to the utility model, the large-diameter special-shaped pipe fitting can be conveniently positioned, clamped, processed, assembled and disassembled.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mechanical manufacturing and processing, in particular to a special-shaped pipe fitting round turning multi-point constant force pressing positioning device. BACKGROUND

[0002] As Figure 1 and Figure 2 The special-shaped pipe fitting is mainly used as an exhaust pipe, the structure is irregular, the outer circle diameter is large, when machining the outer circle, large vertical numerical control round turning or large horizontal numerical control round turning can be used for turning machining, because the outer circle diameter of the special-shaped large diameter pipe fitting is large, the pressing force arm of the ordinary pressing plate is long, leading to the size of the clamp body being large, and the clamp body cannot be machined on the general numerical control round turning and vertical round turning.

[0003] If the large vertical numerical control round turning or large horizontal numerical control round turning is used for turning machining, special tools, special tool handles need to be designed, manufactured and purchased, and there are problems such as high product machining cost, low machining efficiency, high tool cost, high labor cost, poor tool versatility, large clamp size difficult to manufacture, and clamp precision difficult to guarantee. If the large vertical numerical control round turning or large horizontal numerical control round turning is used, the single-piece machining cost is very high, so the type of equipment is expensive, and the corresponding depreciation cost is very high.

[0004] Therefore, a special-shaped pipe fitting round turning multi-point constant force pressing positioning device needs to be designed to solve the problem of machining the outer circle of the special-shaped large diameter pipe fitting, effectively reduce the product machining cost, and improve the machining quality and efficiency. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a special-shaped pipe fitting round turning multi-point constant force pressing positioning device, which is convenient for positioning, clamping, machining and loading and unloading of the large diameter special-shaped pipe fitting, effectively improves the machining quality, efficiency and reduces the manufacturing cost of the corresponding product.

[0006] The utility model adopts the technical scheme that

[0007] A special-shaped pipe fitting round turning multi-point constant force pressing positioning device, including the connecting disc, the right end of the connecting disc is equipped with the counterweight block, the positioning pin and the L type clamp base plate, the clamp base plate is equipped with the linkage balance force clamping mechanism, the first positioning mechanism, the counterweight block and the clamp base plate are detachable fixed in the right end of the connecting disc, the left end of the connecting disc is detachable connected with the lathe main shaft flange, the positioning pin is fixed in the middle part of the connecting disc, the axis of the positioning pin is on the same straight line with the axis of the connecting disc, the clamp base plate is equipped with the positioning hole matched with the positioning pin.

[0008] According to the structure of the special-shaped large diameter pipe fitting, the counterweight blocks are arranged above and behind the clamp base plate, and the counterweight blocks are detachable fixed in the right end of the connecting disc, so that the balance effect is achieved.

[0009] The linkage balance force clamping mechanism comprises a first fixed base, a second fixed base, a rotating pull rod, a pressing nut, a rotating pressing plate, a transition base, a balance component force rod and component force clamping blocks. The first fixed base and the second fixed base are respectively detachably fixed on the inner side of the clamp base plate. Specifically, the first fixed base and the second fixed base are the same in structure and are respectively arranged at the front and rear symmetrical positions of the positioning block. One end of the rotating pull rod is hingedly connected with the first fixed base. Specifically, the top of the first fixed base is provided with a groove, and one end of the rotating pull rod is arranged in the groove and is hingedly connected with the first fixed base through a pin shaft. The other end of the rotating pull rod is provided with the pressing nut. One end of the rotating pressing plate is hingedly connected with the second fixed base. Specifically, the top of the second fixed base is provided with a groove, and one end of the rotating pressing plate is arranged in the groove and is hingedly connected with the second fixed base through a pin shaft. The other end of the rotating pressing plate is provided with a mounting groove corresponding to the rotating pull rod. The rotating pull rod can enter and exit the mounting groove in the rotating process. The transition base is detachably fixed on the inner side of the rotating pressing plate. The middle part of the balance component force rod is hingedly connected in the transition base. Two spaced component force clamping blocks are hingedly connected on the balance component force rod. The component force clamping blocks are provided with clamping grooves, the openings of the clamping grooves are downward, and the clamping grooves are substantially in the shape of a "V" for pressing on the outer side of the workpiece.

[0010] The first positioning mechanism comprises a positioning core shaft and a positioning block. The positioning core shaft is detachably fixed on the inner side of one end of the clamp base plate. The positioning core shaft is provided with a mounting hole, and the right end of the positioning pin extends into the mounting hole. The positioning block is detachably fixed on the inner side of the other end of the clamp base plate. The positioning block is provided with a positioning groove. The opening of the positioning groove is upward and substantially in the shape of a "V" to realize centering positioning, disperse inherent casting deviation of the casting and effectively ensure the machining quality of the product.

[0011] Specifically, the clamp base plate comprises a horizontal plate and a vertical plate. The vertical plate is detachably fixed on the right end of the connecting disc. The positioning core shaft is detachably fixed on the right side of the vertical plate. The positioning block, the first fixed base and the second fixed base are all detachably fixed on the top of the horizontal plate.

[0012] The positioning block is provided with symmetrical elliptical assembly holes, and assembly bolts are arranged in the assembly holes. The positioning block is detachably fixedly connected to the fixture base plate through the assembly bolts. The two sides of the positioning block are provided with adjusting mechanisms for adjusting the position of the positioning block, so that the V-shaped positioning center of the positioning block can be consistent with the center of the lathe main shaft. The adjusting mechanism comprises an adjusting base, an adjusting bolt and a first locking nut. The adjusting base is detachably fixed to the inner side of the fixture base plate. Specifically, the adjusting base is detachably fixed to the top of the horizontal plate of the fixture base plate. The adjusting bolt is horizontally arranged on the adjusting base. The first locking nut is arranged on the adjusting bolt. The inner end of the adjusting bolt is in contact with the two ends of the positioning block. When the positioning block is installed on the fixture base plate, the assembly bolts are not tightened. The adjusting bolt is rotated. Because the assembly hole is elliptical, the position of the positioning block can be adjusted. After the V-shaped center of the positioning block is consistent with the center of the lathe main shaft, the first locking nut is tightened to lock the position of the adjusting bolt. Finally, the assembly bolts of the positioning block are tightened to complete the assembly of the positioning block.

[0013] The fixture base plate is also provided with a second positioning assembly and a third positioning assembly. The second positioning assembly comprises a positioning rod and a second locking nut. The positioning rod is detachably fixed to the inner side of the fixture base plate near the first fixed base. Specifically, the positioning rod is arranged on the top of the horizontal plate and is used to lock the rotational displacement of the pipe. The second locking nut is threadedly connected to the positioning rod and is used to further lock the position of the positioning rod. The third positioning assembly comprises a positioning bracket, a positioning bolt and a third locking nut. The positioning bracket is detachably fixed to the inner side of the first fixed base. The positioning bolt is threadedly connected to the positioning bracket. The positioning bolt is used to contact one side of the inner wall of the side pipe of the special-shaped pipe. The third locking nut is arranged on the positioning bolt and is used to lock the positioning bolt.

[0014] The middle part of the balanced force bar is provided with a pin hole for hinging. The two ends are provided with an inner assembly groove and a pin hole for mounting the force clamping block. The force clamping block is hinged in the inner assembly groove. A gap is arranged between the force clamping block and the bottom of the inner assembly groove. The middle part of the balanced force bar can be self-adjusted and hinged in the transition base. Preferably, an outer assembly groove corresponding to the transition base is arranged on the outside of the middle part of the balanced force bar. There is a gap between the wall of the outer assembly groove and the transition base. The balanced force bar can also be designed as an arc-shaped structure protruding near the transition base. When the pipe deviates, the balanced force bar can automatically adjust and automatically balance the clamping force of the clamping point to prevent excessive concentration of the clamping force in a certain point, which can cause clamping deformation and affect the machining quality.

[0015] The rotating pull rod comprises a clamping part and a hinged part arranged in sequence, the outer diameter of the clamping part is smaller than that of the hinged part, one end of the hinged part is hinged with the first fixed base, and one end of the clamping part extends to the outside of the mounting groove of the rotating pressing plate and is threadedly connected with the pressing nut; the inner side of the pressing nut is provided with a rotating gasket, the outer side of the rotating pressing plate is provided with a gasket groove, the gasket groove is communicated with the mounting groove, the rotating gasket is arranged in the gasket groove, and the pressing nut is tightly pressed on the outer side of the rotating pressing plate, so that the pressing effect is facilitated.

[0016] The utility model discloses the beneficial effects are:

[0017] (1) the utility model discloses be convenient for to the special-shaped large diameter pipe fitting and carry out clamping positioning, compact structure, clever mechanism, realize the processing of special-shaped large diameter pipe fitting round -lathe process under the premise of not using greater equipment, reduce the research and development investment of greater round -lathe equipment, effectively reduce the research and development manufacturing cost.

[0018] (2) the structure design of linkage balance force clamping mechanism is ingenious, greatly reduces the space size of the pressing part, in the clamping process to the workpiece, the balance component force rod can be self -adjusting, realizes the component force multi -point tightening, and the tightening point clamping force is balanced, eliminates the defect that the workpiece clamping deformation is caused by the serious stress of local workpiece, guarantees the product processing quality, simultaneously, reduces the product clamping clamping times, effectively saves the clamping time, improves the processing efficiency.

[0019] (3) the positioning core shaft and the positioning block of first positioning assembly cooperate and work, realize the centering positioning, disperse the inherent casting deviation of the casting, effectively guarantee the processing quality of the product. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is special-shaped large diameter pipe fitting structure schematic view (one);

[0021] Figure 2 It is special-shaped large diameter pipe fitting structure schematic view (two);

[0022] Figure 3 It is the three -dimensional structure schematic view of the utility model and special-shaped large diameter pipe fitting;

[0023] Figure 4 It is the main view structure schematic view of the utility model;

[0024] Figure 5 It is the right view structure schematic view of the utility model;

[0025] Figure 6 It is the structure schematic view of positioning block (one);

[0026] Figure 7 It is the structure schematic view of positioning block (one).

[0027] In the diagram: 1-pipe fitting, 2-side pipe, 3-center hole, 4-connecting disc, 5-counterweight, 6-linkage balancing force clamping mechanism, 7-second fixed base, 8-adjusting mechanism, 9-first positioning component, 10-positioning block, 11-adjusting bolt, 12-first locking nut, 13-adjusting base, 14-clamp base plate, 15-second locking nut, 16-positioning rod, 17-first fixed base, 18-third positioning component, 19-positioning support Frame, 20-Third locking nut, 21-Washer groove, 22-Positioning bolt, 23-Hinge, 24-Rotating pull rod, 25-Mounting groove, 26-Rotating washer, 27-Pressure nut, 28-Clamping part, 29-Rotating pressure plate, 30-Force clamping block, 31-Transition base, 32-Balance force rod, 33-Assembly hole, 34-Assembly bolt, 35-Positioning pin, 36-Positioning mandrel, 37-Inner assembly groove, 38-Outer assembly groove. Detailed Implementation

[0028] like Figures 1-7 As shown, a multi-point constant force clamping and positioning device for irregularly shaped pipe fittings on a round lathe includes a connecting plate 4. The right end of the connecting plate 4 is provided with a counterweight 5, a positioning pin 35, and an L-shaped clamping base plate 14. The clamping base plate 14 is provided with a linkage balancing force clamping mechanism 6 and a first positioning mechanism. The counterweight 5 and the clamping base plate 14 are detachably fixed to the right end of the connecting plate 4 in sequence. The left end of the connecting plate 4 is detachably connected to the lathe spindle flange. The positioning pin 35 is fixed in the middle of the connecting plate 4. The axis of the positioning pin 35 is on the same straight line as the axis of the connecting plate 4. The clamping base plate 14 is provided with a positioning hole that cooperates with the positioning pin 35.

[0029] According to the structure of the irregular large-diameter pipe fitting 1, counterweights 5 are provided above and behind the clamp base plate 14. The counterweights 5 can be detached and fixed to the right end of the connecting plate 4 to facilitate the balancing function.

[0030] The linkage balance force clamping mechanism 6 comprises a first fixed base 17, a second fixed base 7, a rotating pull rod 24, a compression nut 27, a rotating pressure plate 29, a transition base 31, a balance component force rod 32 and a component force clamping block 30. The first fixed base 17 and the second fixed base 7 are respectively detachably fixed on the inner side of the clamp base plate 14. Specifically, the first fixed base 17 and the second fixed base 7 are the same in structure and are respectively arranged at the front and rear symmetrical positions of the positioning block 10. One end of the rotating pull rod 24 is hinged to the first fixed base 17. Specifically, the top of the first fixed base 17 is provided with a groove, and one end of the rotating pull rod 24 is arranged in the groove and is hinged to the first fixed base 17 through a pin shaft. The other end of the rotating pull rod 24 is provided with the compression nut 27. One end of the rotating pressure plate 29 is hinged to the second fixed base 7. Specifically, the top of the second fixed base 7 is provided with a groove, and one end of the rotating pressure plate 29 is arranged in the groove and is hinged to the second fixed base 7 through a pin shaft. The other end of the rotating pressure plate 29 is provided with a mounting groove 25 corresponding to the rotating pull rod 24. The rotating pull rod 24 can enter and exit the mounting groove 25 in the rotating process. The transition base 31 is detachably fixed on the inner side of the rotating pressure plate 29. The middle part of the balance component force rod 32 is hinged in the transition base 31. Two spaced component force clamping blocks 30 are hinged on the balance component force rod 32. The component force clamping blocks 30 are provided with clamping grooves, the openings of the clamping grooves are downward, and the clamping grooves are substantially in the shape of a "V" for compressing on the outer side of the workpiece.

[0031] The first positioning mechanism comprises a positioning core shaft 36 and a positioning block 10. The positioning core shaft 36 is detachably fixed on the inner side of one end of the clamp base plate 14. The positioning core shaft 36 is provided with a mounting hole, and the right end of the positioning pin 35 extends into the mounting hole. The positioning block 10 is detachably fixed on the inner side of the other end of the clamp base plate 14. The positioning block 10 is provided with a positioning groove, the opening of the positioning groove is upward and substantially in the shape of a "V", realizing centering positioning, dispersing the inherent casting deviation of the casting, and effectively ensuring the machining quality of the product.

[0032] Specifically, the clamp base plate 14 comprises a horizontal plate and a vertical plate. The vertical plate is detachably fixed on the right end of the connecting disc 4. The positioning core shaft 36 is detachably fixed on the right side of the vertical plate. The positioning block 10, the first fixed base 17 and the second fixed base 7 are all detachably fixed on the top of the horizontal plate.

[0033] The positioning block 10 is provided with symmetrical oval assembly holes 33, and assembly bolts 34 are arranged in the assembly holes 33. The positioning block 10 is detachably fixedly connected with the clamp base plate 14 through the assembly bolts 34. The two sides of the positioning block 10 are provided with adjusting mechanisms 8 for adjusting the position of the positioning block 10, so that the V-shaped positioning center of the positioning block 10 can be consistent with the center of the lathe main shaft. The adjusting mechanism 8 comprises an adjusting base 13, an adjusting bolt 11 and a first locking nut 12. The adjusting base 13 is detachably fixed to the inner side of the clamp base plate 14. Specifically, the adjusting base 13 is detachably fixed to the top of the horizontal plate of the clamp base plate 14. The adjusting bolt 11 is horizontally arranged on the adjusting base 13. The first locking nut 12 is arranged on the adjusting bolt 11. The inner end of the adjusting bolt 11 is in abutting contact with the two ends of the positioning block 10. When the positioning block 10 is installed on the clamp base plate 14, the assembly bolts 34 are not tightened. The adjusting bolt 11 is rotated. Because the assembly holes 33 are oval, the position of the positioning block 10 can be adjusted. After the V-shaped center of the positioning block 10 is consistent with the center of the lathe main shaft, the first locking nut 12 is tightened to lock the position of the adjusting bolt 11. Finally, the assembly bolts 34 of the positioning block 10 are tightened to complete the assembly of the positioning block 10.

[0034] The clamp base plate 14 is further provided with a second positioning assembly and a third positioning assembly 18. The second positioning assembly comprises a positioning rod 16 and a second locking nut 15. The positioning rod 16 is detachably fixed to the inner side of the clamp base plate 14 near the first fixed base 17. Specifically, the positioning rod 16 is arranged on the top of the horizontal plate and is used for locking the rotational displacement of the pipe fitting 1. The second locking nut 15 is threadedly connected to the positioning rod 16 and is used for further locking the position of the positioning rod 16. The third positioning assembly 18 comprises a positioning bracket 19, a positioning bolt 22 and a third locking nut 20 and is used for positioning the left and right displacement of the special-shaped pipe fitting 1. The positioning bracket 19 is detachably fixed to the inner side of the first fixed base 17. The positioning bolt 22 is threadedly connected to the positioning bracket 19. The positioning bolt 22 is used for contacting one side of the inner wall of the side pipe 2 of the special-shaped pipe fitting 1. The third locking nut 20 is arranged on the positioning bolt 22 and is used for locking the positioning bolt 22.

[0035] The middle part of the balanced force bar 32 is provided with a pin hole for hinging, and the two ends are provided with an inner assembly groove 37 and a pin hole for mounting the force clamping block 30, the force clamping block 30 is hinged in the inner assembly groove 37, a space is arranged between the force clamping block 30 and the bottom of the inner assembly groove 37, the middle part of the balanced force bar 32 is self-adjustably hinged in the transition base 31, preferably, an outer assembly groove 38 corresponding to the transition base 31 is arranged on the outer side of the middle part of the balanced force bar 32, and a space is arranged between the wall of the outer assembly groove 38 and the transition base 31, or the balanced force bar 32 can be designed as an arc-shaped structure protruding near the transition base 31, when the pipe fitting 1 deviates, the balanced force bar 32 can automatically adjust, automatically balance the clamping force of the clamping point, prevent the clamping deformation due to the excessive concentration of the clamping force on a certain point, and cause the machining quality deviation.

[0036] The rotating pull rod 24 comprises the clamping part 28 and the hinge part 23 arranged in sequence, the outer diameter of the clamping part 28 is smaller than that of the hinge part 23, one end of the hinge part 23 is hinged with the first fixed base 17, one end of the clamping part 28 extends to the outside of the mounting groove 25 of the rotating pressure plate 29 and is threadedly connected with the pressure nut 27; the inner side of the pressure nut 27 is provided with a rotating gasket 26, the outer side of the rotating pressure plate 29 is provided with a gasket groove 21, the gasket groove 21 is communicated with the mounting groove 25, the rotating gasket 26 is arranged in the gasket groove 21, and the pressure nut 27 is tightly arranged on the outer side of the rotating pressure plate 29, so that the pressure tightening effect is achieved.

[0037] The use method of the utility model is:

[0038] The first step is that the assembled linkage balanced force clamping mechanism 6 is detachably fixed on the lathe, that is, the left end of the connecting disc 4 is detachably connected with the lathe spindle flange, and the first positioning assembly 9 and the third positioning assembly 18 are adjusted in place.

[0039] The second step is that the workpiece is placed on the first positioning assembly 9, the positioning mandrel 36 corresponds to the center hole 3 in the middle part of the workpiece, in the placing process, the workpiece is slightly inclined, the positioning bolt 22 of the third positioning assembly 18 is conveniently arranged in the side pipe 2 of the workpiece, when the positioning bolt 22 is arranged in the side pipe 2 of the workpiece, the workpiece is placed downwards to the end of the positioning bolt 22 and the inner wall of the side pipe 2 of the workpiece, the top end of the positioning rod 16 is attached to the outer wall of the side pipe 2 of the workpiece, the positioning groove on the positioning block 10 is attached to the outer wall of the workpiece, and the position of the workpiece is adjusted.

[0040] The third step is that the rotating pressure plate 29 is rotated, the two force clamping blocks 30 tightly hold the workpiece, the rotating pull rod 24 is rotated, the rotating pull rod 24 is arranged in the mounting groove 25 of the rotating pressure plate 29, and the pressure nut 27 and the rotating gasket 26 are tightened by using a wrench.

[0041] The fourth step is that after the workpiece is tightly pressed, the outer circle of the workpiece is machined until the outer circle process is completed.

[0042] Fifth step: loosen the compression nut 27 and the rotary gasket 26 with a wrench, rotate the rotary pull rod 24, the rotary pull rod 24 is removed from the mounting groove 25, rotate the rotary pressing plate 29, make two component force clamping blocks 30 separate from the workpiece, remove the workpiece.

[0043] The workpiece is a special-shaped large-diameter pipe 1, which is convenient for description and understanding.

[0044] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0045] The above examples are illustrative of the utility model and are not limiting of the utility model, and any simple transformation of the utility model falls within the protection scope of the utility model.

Claims

1. A multi-point constant force pressing positioning device for round turning of a profiled pipe, comprising a connecting disc, characterized in that The right end of the connecting disc is provided with a counterweight, a positioning pin and an L-shaped clamp base plate, the clamp base plate is provided with a linkage balance force clamping mechanism and a first positioning mechanism, the counterweight and the clamp base plate are detachably fixed to the right end of the connecting disc in sequence, the positioning pin is fixed to the middle part of the connecting disc, and the clamp base plate is provided with a positioning hole matched with the positioning pin; The linkage balance force clamping mechanism comprises a first fixed base, a second fixed base, a rotating pull rod, a pressing nut, a rotating pressing plate, a transition base, a balance component force rod and a component force clamping block, the first fixed base and the second fixed base are detachably fixed to the inner side of the clamp base plate respectively, one end of the rotating pull rod is hinged to the first fixed base, the other end of the rotating pull rod is provided with the pressing nut, one end of the rotating pressing plate is hinged to the second fixed base, the other end of the rotating pressing plate is provided with a mounting groove corresponding to the rotating pull rod, the transition base is detachably fixed to the inner side of the rotating pressing plate, the middle part of the balance component force rod is hinged in the transition base, two spaced component force clamping blocks are hinged to the balance component force rod, and the component force clamping blocks are provided with clamping grooves.

2. The round bar multi-point constant force pressing positioning device for special-shaped pipe according to claim 1, characterized in that: The first positioning mechanism comprises a positioning core shaft and a positioning block, the positioning core shaft is detachably fixed to the inner side of one end of the clamp base plate, the positioning core shaft is provided with a mounting hole, and the right end of the positioning pin extends into the mounting hole; the positioning block is detachably fixed to the inner side of the other end of the clamp base plate, and the positioning block is provided with a positioning groove.

3. The round bar multi-point constant force pressing positioning device for special-shaped pipe according to claim 2, characterized in that: The positioning block is provided with symmetrically-arranged elliptical assembly holes, assembly bolts are arranged in the assembly holes, and the positioning block is detachably fixedly connected with the clamp base plate through the assembly bolts; both sides of the positioning block are provided with adjusting mechanisms, the adjusting mechanisms comprise an adjusting base, an adjusting bolt and a first locking nut, the adjusting base is detachably fixed to the inner side of the clamp base plate, the adjusting bolt is horizontally arranged on the adjusting base, the first locking nut is arranged on the adjusting bolt, and the inner end of the adjusting bolt is in abutting contact with both ends of the positioning block.

4. The round bar multi-point constant force pressing positioning device for special-shaped pipe according to claim 1, characterized in that: The clamp base plate is also provided with a second positioning assembly and a third positioning assembly, the second positioning assembly comprises a positioning rod and a second locking nut, the positioning rod is detachably fixed to the inner side of the clamp base plate close to the first fixed base, and the second locking nut is threadedly connected to the positioning rod; the third positioning assembly comprises a positioning support, a positioning bolt and a third locking nut, the positioning support is detachably fixed to the inner side of the first fixed base, the positioning bolt is threadedly connected to the positioning support, and the third locking nut is arranged on the positioning bolt.

5. The profiled pipe round rolling multi-point constant force pressing positioning device according to claim 1, characterized in that: The middle part of the balance component force rod is provided with a pin shaft hole for hinging, both ends are provided with an inner assembly groove and a pin shaft hole for mounting the component force clamping block, the component force clamping block is hinged in the inner assembly groove, a space is arranged between the component force clamping block and the bottom of the inner assembly groove, and the middle part of the balance component force rod can be self-adjustably hinged in the transition base.

6. The profiled pipe round rolling multi-point constant force pressing positioning device according to claim 1, characterized in that: The rotating pull rod comprises a clamping portion and a hinge portion arranged in sequence, the outer diameter of the clamping portion is smaller than that of the hinge portion, one end of the hinge portion is hinged to the first fixed base, one end of the clamping portion extends to the outside of the mounting groove of the rotating pressing plate and is threadedly connected with the pressing nut, the inner side of the pressing nut is provided with a rotating gasket, the outer side of the rotating pressing plate is provided with a gasket groove, the gasket groove is communicated with the mounting groove, the rotating gasket is arranged in the gasket groove, and the pressing nut is in abutting contact with the outer side of the rotating pressing plate.

Images