CN112404209B - Drawing type pipe fitting connecting process - Google Patents

Drawing type pipe fitting connecting process Download PDF

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Publication number
CN112404209B
CN112404209B CN202011182270.0A CN202011182270A CN112404209B CN 112404209 B CN112404209 B CN 112404209B CN 202011182270 A CN202011182270 A CN 202011182270A CN 112404209 B CN112404209 B CN 112404209B
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Prior art keywords
pipeline
groove
hole
flanging
block
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CN202011182270.0A
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CN112404209A (en
Inventor
王强
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Chongqing Huaao Electromechanical Co ltd
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Chongqing Huaao Electromechanical Co ltd
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Priority to CN202011182270.0A priority Critical patent/CN112404209B/en
Publication of CN112404209A publication Critical patent/CN112404209A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/02—Welded joints
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426—Fixtures for other work
    • B23K37/0435—Clamps
    • B23K37/0443—Jigs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/06—Tubes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Metal Extraction Processes (AREA)

Abstract

The invention belongs to the technical field of pipe fitting processing, and particularly relates to a drawing type pipe fitting connecting process, which comprises the following processing steps: (1) Preparing a main pipeline and a pipeline to be spliced, and forming a pre-hole in the main pipeline, wherein the aperture of the pre-hole is 2-4mm smaller than that of the pipeline to be spliced; (2) A cylindrical flanging is outwards turned out in the pipe of the main pipeline through the pre-hole by using a drawing die; (3) Extending the pipeline to be spliced into the pre-hole to enable the pipeline to be spliced to be in contact with the inner wall of the flanging; and welding the pipeline to be spliced and the flanging in a welding mode. In the scheme, the flanges are processed at the pre-holes, and the main pipeline and the pipeline to be spliced are welded by the flanges, so that the welding positions of the main pipeline and the pipeline to be spliced are positioned on the same horizontal plane, the probability of welding missing is reduced, and the welding strength is improved; and the contact area of the main pipeline and the pipeline to be spliced can be enhanced by the arrangement of the flanging, the welding position with concentrated stress is avoided, and the overall strength of the welded pipeline is ensured.

Description

Drawing type pipe fitting connecting process
Technical Field
The invention belongs to the technical field of pipe fitting machining, and particularly relates to a drawing type pipe fitting connecting process.
Background
In some devices, metal pipes are often required to be cross-connected with each other for use, for example, some pipe fittings in automobile water tanks and radiators, namely, a plurality of holes are processed on the walls of tubular upper and lower water chambers, and one end of a water pipe is connected to each hole; a plurality of holes are processed on the side wall of the novel water delivery device and are used for mutually cross-connecting a sewage pipe or a condensate pipe. The existing process for cross-linking metal pipes comprises the following steps: the pipe wall is provided with a through hole, the water pipes to be spliced are inserted into the through hole and then welded, the contact surface between the metal pipes which are spliced mutually is basically the wall thickness of the metal pipes, the welding surface is narrow, the through hole is a curved surface, the shape to be welded is irregular, welding leakage is easy to generate, and the firmness after welding is still to be improved; in order to avoid the situations of missing soldering, weak soldering and the like, a large amount of solder is generally used for soldering, and the production cost is increased.
Disclosure of Invention
The invention aims to provide a drawing type pipe fitting connecting process to solve the problems that welding is easy to leak and the welding firmness is not high enough by using the existing processing method.
In order to achieve the purpose, the scheme of the invention is as follows: a drawing type pipe fitting connecting process comprises the following processing steps:
(1) Preparing a main pipeline and a pipeline to be spliced, and forming a pre-hole in the main pipeline, wherein the aperture of the pre-hole is 2-4mm smaller than that of the pipeline to be spliced;
(2) A cylindrical flanging is turned outwards through the pre-hole in the pipe of the main pipeline by using a drawing die;
(3) Extending the pipeline to be spliced into the pre-hole to enable the pipeline to be spliced to be in contact with the inner wall of the flanging; and welding the pipeline to be spliced and the flanging in a welding mode.
The working principle and the beneficial effects of the scheme are that:
in the scheme, the flanging is processed at the pre-hole position, and the main pipeline and the pipeline to be spliced are welded by using the flanging, so that the welding position of the main pipeline and the pipeline to be spliced can be ensured to be positioned on the same horizontal plane, the probability of the occurrence of the welding missing condition is reduced, and the welding strength is improved; and turn-ups set up can strengthen the main pipe and treat the area of contact of concatenation pipeline, avoids stress concentration at the welding department, guarantees the bulk strength of welding back pipeline.
Optionally, in the step (2), the flanging height of the flanging is controlled by cutting and grinding, and burrs on the flanging are removed, so that the flanging is kept smooth. The height of the flanging and the surface cleanliness are controlled, the quality of the flanging is ensured to meet the requirements, the main pipeline and the pipeline to be spliced can be better welded together, and the welding quality is ensured.
Optionally, the drawing die comprises a drawing rod and a drawing die head detachably connected to the drawing rod, the drawing die head comprises a large-diameter ball head and a small-diameter end connected to the large-diameter ball head, the small-diameter end can penetrate through the pre-hole, and the large-diameter ball head can be used for flanging the inside of the pipe of the main pipeline outwards through the pre-hole. When the flanging is needed, the drawing die head enters the pipe of the main pipeline, the small-diameter end of the drawing die head penetrates out through the pre-hole, and the large-diameter ball head of the drawing die head is clamped in the main pipeline. The drawing die head is fixed on the drawing rod, and the flange can be outwards turned out at the periphery of the pre-hole of the main pipeline through the large-diameter ball head by applying acting force to the drawing rod.
Optionally, the drawing rod is provided with a threaded hole, and the small-diameter end of the drawing die head is in threaded connection with the threaded hole. The pulling rod and the pulling probe are connected in a threaded connection mode, and the installation and the disassembly are simple and convenient to operate.
Optionally, a magnet is arranged in a threaded hole of the drawing rod, and an attraction block capable of attracting the magnet mutually is arranged on one side, away from the large-diameter ball head, of the small-diameter end of the drawing die head. During flanging, the small-diameter end of the drawing die head needs to extend out of the main pipeline from the inside to the outside through the pre-hole, the size of the space inside the main pipeline is limited, and the drawing die head is difficult to be matched with the pre-hole and the small-diameter end extends out through manual operation. In this scheme, when needing to utilize drawing die utensil turn-ups on the trunk line, back in the trunk line will be put into to the drawing die head, the attraction that utilizes magnet on the pull rod makes the drawing die head move to pre-hole department, owing to be provided with on the small diameter end of drawing die head and inhale the piece, there is magnetic attraction between magnet and the attraction piece, the small diameter end stretches out the pre-hole and stretches into the screw hole under the effect of magnetic attraction, twist the small diameter end, make small diameter end threaded connection can make the pull rod fixed with the interior drawing die head of trunk line on the screw hole, the effort can be pulled out the turn-ups on the trunk line to the pull rod this moment. In this scheme, make drawing die head can be accurate remove to hole in advance department through ingenious design to make the path end stretch out the hole in advance, easy operation is convenient.
Optionally, in the step (2), an acting force is applied to the drawing die through a drawing device in the flanging process, so that the drawing die can process a flanging on the main pipeline; the drawing device comprises a positioning block, a fixing part and a tension mechanism for applying acting force to the drawing rod; the fixing part comprises a positioning seat and a clamping block which is connected to the positioning seat in a sliding manner, and the positioning seat is fixed on the tension mechanism; the clamping block is provided with a clamping groove penetrating through one side of the clamping block, and one side of the pull rod is provided with a connecting block which can extend into the clamping groove from one side of the clamping block and is clamped in the clamping groove; the positioning block is provided with a through hole for the drawing rod to pass through, one side of the positioning block, which is far away from the fixing part, is provided with a supporting block for limiting the position of the main pipeline, and the supporting block is provided with a through hole communicated with the through hole. When carrying out the turn-ups to the trunk line, install drawing die utensil on the trunk line earlier, make the through-hole of locating piece passed to the one end of pull rod, adjust the position of fixture block, make the draw-in groove and the connecting block of fixture block. The pulling mechanism is operated, an acting force far away from the main pipeline is applied to the drawing rod through the positioning seat and the clamping block, and the large-diameter ball head on the drawing rod outwards turns out a flanging at the periphery of the pre-hole of the main pipeline.
Optionally, one side of the supporting block, which is far away from the positioning block, is provided with an arc-shaped groove which can be attached to the side wall of the main pipeline. When needing the turn-ups, will laminate on the arc wall with the trunk line after the drawing die cooperation, the arc wall has certain positioning action to the trunk line, can avoid turn-ups in-process trunk line to rock at will.
Optionally, a groove capable of accommodating the main pipeline is formed in one side, away from the positioning block, of the supporting block, clamping parts are symmetrically arranged in the supporting block, each clamping part comprises an accommodating groove communicated with the groove and a clamping plate located in the accommodating groove, and one end, away from the positioning block, of each clamping plate is hinged in the accommodating groove; a sliding groove is formed in one side, away from the groove, of the clamping plate, and a sliding block is connected to the sliding groove in a sliding mode; a moving groove communicated with the accommodating groove is formed in the supporting block, a push rod is connected in the moving groove in a sliding mode, and one end of the push rod is hinged to the sliding block; the channel is connected between the two moving grooves, the adjusting groove communicated with the channel is formed in the supporting block, hydraulic oil is filled in the adjusting groove, and the piston and the adjusting portion used for adjusting the position of the piston are connected in the adjusting groove in a sliding mode.
When the main pipeline is flanged, the position of the main pipeline needs to be limited to a certain extent, the main pipeline is prevented from moving randomly, the central position of the large-diameter ball head keeps consistent with the central position of the pre-hole when the flanging is ensured, and the flanging quality is ensured. To the trunk line of single size, can effectively avoid the random removal of trunk line through setting up the fixed slot, then can't be suitable for during nevertheless the different size of a dimension trunk line of processing. In this scheme, set up the recess that can hold multiple not unidimensional, when carrying out the turn-ups to the trunk line of certain size, will draw the pole and pass opening, through-hole, make the trunk line hug closely on the inner wall of recess to ensure that the central point of major diameter bulb puts and keeps unanimous with the central point of hole in advance puts. The operation regulation portion for the piston is to the inside removal of adjustment tank, and the hydraulic oil of adjustment tank orders about the ejector pin and stretches out to recess one side, and the ejector pin makes the grip block take place to swing, and when two grip blocks all in the trunk line contact, stop the operation regulation portion, at this moment under recess inner wall, two grip block three's combined action, the trunk line is by better location, and turn-ups in-process can not swing at will, guarantees turn-ups quality. When still carrying out the turn-ups next time to the trunk line that the size is the same, directly stretch into the recess with the trunk line, ensure that the trunk line all can be better with recess inner wall, two grip blocks contact and fix a position the trunk line, do not need the operation regulating part once more, adjust the position of grip block. When the main pipes with other sizes are flanged, the position of the clamping plate is changed by operating the adjusting part.
Optionally, the adjusting portion includes a screw rod having one side screwed into the adjusting groove and an elastic member for restoring the piston, and an end of the screw rod can be kept in contact with the piston by the elastic member. When the position of the piston needs to be adjusted, the screw rod is screwed in the fixed direction to move the screw rod, and when the screw rod moves to one side far away from the piston, the piston moves to one side of the screw rod under the action of the elastic piece; when the screw rod moves to one side close to the piston, the piston moves to the inner part of the adjusting groove under the action of the screw rod.
Optionally, the resilient member is a compression spring.
Drawings
FIG. 1 is a schematic structural diagram of a drawing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a drawing die according to a first embodiment of the present invention;
FIG. 3 is a sectional view of the support block in a front view (with the clamping plate in a retracted state) according to a second embodiment of the present invention;
fig. 4 is a front sectional view of the support block according to the second embodiment of the present invention (the clamping plate is in a clamped state).
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the drawing die comprises a hydraulic cylinder 10, a positioning seat 20, a strip-shaped dovetail groove 21, a fixture block 30, a clamping groove 31, a drawing rod 40, a connecting block 41, a magnet 42, a drawing die head 50, a large-diameter ball head 51, a small-diameter end 52, an attraction block 53, a positioning block 60, a main pipeline 70, a supporting block 80, a channel 81, an adjusting groove 82, an elastic piece 83, a piston 84, a screw 85, a moving groove 86, an accommodating groove 87, a groove 88, a clamping plate 90, a sliding groove 91, a sliding block 92 and a push rod 93.
Example one
A drawing type pipe fitting connecting process comprises the following processing steps:
(1) Preparing a main pipeline and a pipeline to be spliced, and arranging a pre-hole on the main pipeline, wherein the aperture of the pre-hole is 2-4mm smaller than that of the pipeline to be spliced.
(2) A drawing die is used in the pipe of the main pipeline to outwards turn out a cylindrical flanging through the pre-hole, and acting force is applied to the drawing die through the drawing device in the flanging process. The flanging height of the flanging is controlled by cutting and polishing, and burrs on the flanging are removed, so that the flanging is kept smooth. The height of the flanging is controlled to be 2-4mm, and in the embodiment, the height of the flanging is controlled to be 3mm.
(3) Extending the pipeline to be spliced into the pre-hole to enable the pipeline to be spliced to be in contact with the inner wall of the flanging; and welding the pipeline to be spliced and the flanging in a welding mode.
As shown in fig. 2, the drawing die used in step (2) includes a drawing rod 40 and a drawing die head 50 detachably connected to the drawing rod 40, the drawing die head 50 includes a large-diameter ball 51 and a small-diameter end 52 welded to the large-diameter ball 51, the small-diameter end 52 can pass through the pre-hole, and the large-diameter ball 51 can be used to turn up the inside of the main pipe 70. The drawing rod 40 is provided with a threaded hole, and the small-diameter end 52 of the drawing die head 50 is in threaded connection in the threaded hole. A magnet 42 is fixedly arranged in a threaded hole of the drawing rod 40, an attraction block 53 capable of attracting the magnet 42 is fixedly arranged in one side of the small-diameter end 52 of the drawing die head 50 away from the large-diameter ball head 51, and in the embodiment, the attraction block 53 is an iron block; in this embodiment, the small diameter end 52 can also be made of iron blocks directly, so that the iron blocks do not need to be fixed on the small diameter end 52.
As shown in fig. 1, the drawing apparatus of the present embodiment includes a frame, a positioning block 60, a fixing portion, and a pulling mechanism for applying a force to the drawing bar 40, which in this embodiment is a hydraulic cylinder 10 fixedly mounted on the frame. The fixing part comprises a positioning seat 20 and a fixture block 30 connected to the positioning seat 20 in a sliding manner, specifically, a strip-shaped dovetail groove 21 is formed on the positioning seat 20, and a projection which is clamped in the strip-shaped dovetail groove 21 and can slide along the strip-shaped dovetail groove 21 is fixed on the fixture block 30; the positioning seat 20 is fixed on the piston rod of the hydraulic cylinder 10. The clamping block 30 is provided with a clamping groove 31 penetrating through one side of the clamping block 30, and the cross section of the clamping groove 31 is T-shaped; the left end of the pull rod 40 is fixed with a connecting block 41 capable of being matched with the clamping groove 31, the connecting block 41 can extend into the clamping groove 31 from one side of the clamping block 30 and be clamped in the clamping groove 31, and when the connecting block 41 is clamped in the clamping groove 31, acting force pointing to one side of the pull rod 40 is applied to the connecting block 41, so that the connecting block 41 cannot be separated from the clamping groove 31. The positioning block 60 is fixedly arranged on the rack, a through hole for the drawing rod 40 to pass through is formed in the positioning block 60, a supporting block 80 used for limiting the position of the main pipeline 70 is fixed on one side, away from the fixing portion, of the positioning block 60, and a through hole communicated with the through hole is formed in the supporting block 80. One side of the supporting block 80 far away from the positioning block 60 is provided with an arc-shaped groove capable of being attached to the side wall of the main pipeline 70, the arc-shaped groove has a certain positioning effect on the main pipeline 70, and the main pipeline 70 can be prevented from shaking randomly in the flanging process.
When flanging is needed, the drawing die head 50 enters the pipe of the main pipe 70, the small-diameter end 52 of the drawing die head 50 penetrates out of the pre-hole, and the large-diameter ball 51 of the drawing die head 50 is clamped in the main pipe 70. The drawing rod 40 and the drawing head are connected in a threaded connection mode, one end of the drawing rod 40 penetrates through the through hole of the positioning block 60, the position of the fixture block 30 is adjusted, and the clamping groove 31 of the fixture block 30 is clamped with the connecting block 41. The hydraulic cylinder 10 is operated, an acting force far away from the main pipe 70 is applied to the pull rod 40 through the positioning seat 20 and the fixture block 30, and the large-diameter ball head 51 on the pull rod 40 is turned outwards at the periphery of the pre-hole of the main pipe 70.
Example two
The difference between the present embodiment and the first embodiment is: as shown in fig. 3 and 4, the supporting block 80 is not provided with an arc-shaped groove, but is provided with a groove 88 capable of accommodating the main pipe 70 on one side away from the positioning block 60, clamping portions symmetrically arranged in the upper and lower sides of the supporting block 80 are provided, each clamping portion comprises an accommodating groove 87 communicated with the groove 88 and a clamping plate 90 located in the accommodating groove 87, the right end (the end away from the positioning block 60) of the clamping plate 90 is hinged in the accommodating groove 87, and the clamping plate 90 can swing and extend into the groove 88. The side of the clamping plate 90 away from the groove 88 is provided with a sliding groove 91 with a dovetail-shaped cross section, the sliding groove 91 is distributed along the swinging direction of the clamping plate 90, and the sliding groove 91 is connected with a sliding block 92 in a sliding way. The supporting block 80 is provided with a moving groove 86 communicated with the accommodating groove 87, the moving groove 86 slides and is hermetically connected with a push rod 93, and one end of the push rod 93 is hinged on the sliding block 92. A channel 81 is connected between the two moving grooves 86, an adjusting groove 82 communicated with the channel 81 is formed in the supporting block 80, hydraulic oil is filled in the adjusting groove 82, and a piston 84 and an adjusting part used for adjusting the position of the piston 84 are connected in the adjusting groove 82 in a sliding and sealing mode.
The adjusting part comprises a screw rod 85 and an elastic piece 83 positioned in the adjusting groove 82, one side of the screw rod 85 is in threaded connection in the adjusting groove 82, the elastic piece 83 is a compression spring, and under the action of the compression spring, the end part of the screw rod 85 can be kept in contact with the piston 84. When the position of the piston 84 needs to be adjusted, the screw rod 85 is screwed in the fixed direction to move the screw rod 85, and when the screw rod 85 moves away from the piston 84, the piston 84 moves towards the screw rod 85 under the action of the elastic element 83; when the screw 85 moves toward the side close to the piston 84, the piston 84 moves toward the inside of the adjustment groove 82 by the screw 85.
In this scheme, set up the recess 88 that can hold multiple not unidimensional, when carrying out the turn-ups to the trunk line 70 of certain size, pass through opening, through-hole with pull rod 40, make trunk line 70 hug closely on the inner wall of recess 88 to the central point who ensures big footpath bulb 51 puts and keeps unanimous with the central point who advances the hole. Operation regulating part for piston 84 is to the inside removal of adjustment tank 82, and hydraulic oil in the adjustment tank 82 orders about ejector pin 93 and stretches out to recess 88 one side, and ejector pin 93 makes grip block 90 take place the swing, when two grip block 90 all with trunk line 70 contact, stop operation regulating part, at this moment under recess 88 inner wall, two grip block 90 three's combined action, trunk line 70 is by better location, and the turn-ups in-process can not swing at will, guarantees turn-ups quality. When still carrying out the turn-ups next time to the trunk line 70 that the size is the same, directly stretch into recess 88 with trunk line 70 in, ensure that trunk line 70 all can be better with recess 88 inner wall, two grip blocks 90 contact and fix a position trunk line 70, need not operate the regulation part once more, adjust grip block 90's position. When the main pipe 70 with other sizes is flanged, the position of the clamping plate 90 can be changed by operating the adjusting part.
The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics in the schemes is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.

Claims (7)

1. A drawing type pipe fitting connecting process is characterized in that: the method comprises the following processing steps:
(1) Preparing a main pipeline and a pipeline to be spliced, and forming a pre-hole in the main pipeline, wherein the aperture of the pre-hole is 2-4mm smaller than that of the pipeline to be spliced;
(2) A cylindrical flanging is outwards turned out in the pipe of the main pipeline through the pre-hole by using a drawing die, and the drawing die comprises a drawing rod and a drawing die head detachably connected to the drawing rod; in the flanging process, acting force is applied to the drawing die through drawing equipment, so that the drawing die can process a flanging on the main pipeline; the drawing device comprises a positioning block, a fixing part and a tension mechanism for applying acting force to the drawing rod; the fixing part comprises a positioning seat and a clamping block connected to the positioning seat in a sliding manner, and the positioning seat is fixed on the tension mechanism; a through hole for the drawing rod to pass through is formed in the positioning block, a supporting block used for limiting the position of the main pipeline is arranged on one side, away from the fixing part, of the positioning block, and a through hole communicated with the through hole is formed in the supporting block; a groove capable of accommodating the main pipeline is formed in one side, away from the positioning block, of the supporting block, clamping parts are symmetrically arranged in the supporting block, each clamping part comprises an accommodating groove communicated with the groove and a clamping plate located in the accommodating groove, and one end, away from the positioning block, of each clamping plate is hinged in the accommodating groove; a sliding groove is formed in one side, away from the groove, of each clamping plate, a sliding block is connected onto the sliding groove in a sliding mode, and the two clamping plates are not parallel when clamped; a moving groove communicated with the accommodating groove is formed in the supporting block, a push rod is connected in the moving groove in a sliding mode, and one end of the push rod is hinged to the sliding block; a channel is connected between the two moving grooves, an adjusting groove communicated with the channel is formed in the supporting block, hydraulic oil is filled in the adjusting groove, and a piston and an adjusting part used for adjusting the position of the piston are connected in the adjusting groove in a sliding mode; the adjusting part comprises a screw rod with one side in threaded connection with the adjusting groove and an elastic piece for resetting the piston, and the end part of the screw rod can keep contact with the piston under the action of the elastic piece;
(3) Extending the pipeline to be spliced into the pre-hole to enable the pipeline to be spliced to be in contact with the inner wall of the flanging; and welding the pipeline to be spliced and the flanging in a welding mode.
2. The drawn pipe connection process of claim 1, wherein: in the step (2), the flanging height of the flanging is controlled in a cutting and polishing mode, and burrs on the flanging are removed, so that the flanging is kept smooth.
3. The drawn pipe connection process according to claim 2, wherein: the drawing die head comprises a large-diameter ball head and a small-diameter end connected to the large-diameter ball head, the small-diameter end can penetrate through the pre-hole, and the large-diameter ball head can be used for turning out a flanging in the pipe of the main pipeline through the pre-hole.
4. The drawn pipe connection process of claim 3, wherein: the drawing rod is provided with a threaded hole, and the small-diameter end of the drawing die head is in threaded connection with the threaded hole.
5. The drawn pipe connection process according to claim 4, wherein: the threaded hole of the drawing rod is internally provided with a magnet, and one side of the small-diameter end of the drawing die head, which is far away from the large-diameter ball head, is provided with an attraction block which can attract the magnet.
6. The drawn pipe connection process of claim 1, wherein: the clamping block is provided with a clamping groove penetrating through one side of the clamping block, and one side of the pull rod is provided with a connecting block which can extend into the clamping groove from one side of the clamping block and is clamped in the clamping groove.
7. The drawn pipe connection process according to claim 1, wherein: the elastic member is a compression spring.
CN202011182270.0A 2020-10-29 2020-10-29 Drawing type pipe fitting connecting process Active CN112404209B (en)

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CN112404209B true CN112404209B (en) 2023-01-24

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