CN114535853B

CN114535853B - Straight curved pipe bears frock and two end caps pressure equipment welding set

Info

Publication number: CN114535853B
Application number: CN202210326644.4A
Authority: CN
Inventors: 吴剑斌; 覃晶晶; 郑亮
Original assignee: Jiangxi Avonflow Heating Ventilation Technology Co ltd
Current assignee: Jiangxi Avonflow Heating Ventilation Technology Co ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2023-09-05
Anticipated expiration: 2042-03-30
Also published as: CN114535853A

Abstract

A straight-bending circular tube bearing tool and a double-plug press-fitting welding device. The utility model provides a straight curved pipe bears frock, includes two sets of moving assembly that the structure is unanimous, and arbitrary a set of moving assembly includes the bottom plate, is connected with the riser on the bottom plate, riser constitute one and place the return bend station, be provided with the boss on the riser in the one side of placing the return bend, the boss of two sets of moving assembly between have the interval, be provided with on the boss and stretch to spaced lug, the lug is through first link connection straight tube platform. The invention can carry out double-head press fitting and continuous ring welding operation on two bent pipes of a single product at one time, has high efficiency, and is particularly suitable for bent pipe fittings; the invention is also suitable for straight and bent pipes with different specifications and sizes, and particularly can be adjusted and positioned at multiple points according to the bent pipe fittings, so that the condition that the bent pipe is scrapped due to press mounting deformation is avoided, the press mounting assembly is kept perpendicular to the end face and the barrel cover assembly is kept parallel to the end face according to the shape of the bent pipe, and the press mounting welding quality is ensured.

Description

Straight curved pipe bears frock and two end caps pressure equipment welding set

Technical Field

The invention relates to the field of heating ventilation, in particular to a straight-bending circular tube bearing tool which is used for bearing a straight tube or an elbow tube to be pressed and welded with plugs, and also relates to a double-plug press-fitting welding device with the straight-bending circular tube bearing tool, which is used for performing press-fitting and welding operations of plugs on two ends of the straight tube or the elbow tube which is placed on the straight-bending circular tube bearing tool, is suitable for a main straight circular tube and an abnormal-shaped circular tube, and is not suitable for other abnormal-shaped tubes with non-circular sections.

Background

The drying rack and the towel rack are used as an indispensable living article in life, are closely related to the life of people, are formed by overlapping a plurality of pipes, and are required to be welded and blocked at two ends of each pipe. In the current electric heating drying rack production process, a drying rack main body is formed by assembling a vertical pipe and a transverse pipe after a pipe expanding process, after entering a plugging process, plug assemblies are plugged into vertical pipe holes on two sides of the drying rack main body one by one manually, and the vertical pipe holes are knocked to a position flush with the end face of the vertical pipe by a hammer.

At present, an automatic device is used for pressing and installing plugs on pipe fittings, but is suitable for straight pipe fittings, the pipe fittings of the towel rack are mainly round pipes, the end parts of the pipe fittings are sealed by pressing and welding the plugs, but along with development, on one hand, the aesthetic design of the drying rack and the towel rack products occupies more and more important positions, the bent pipe fittings are gradually appeared, for example, a drying rack shown by the publication number CN306593152S is provided, the main rod of the drying rack is bent, the pressing and installing equipment suitable for the straight pipe fittings at present is not suitable for the welding equipment, the scheme adopted at present is still a traditional manual operation mode, but due to the continuous expansion of the yield, the required labor quantity and labor intensity are also increased increasingly, and automatic assembly equipment is urgently needed to replace manpower, reduce the labor intensity and improve the production efficiency.

Disclosure of Invention

According to the problems set forth in the background art, the invention provides a straight-bending circular tube bearing tool and a double-plug press-fitting welding device for solving the problems, and the invention is further described below.

The straight-bending circular tube bearing tool comprises two groups of moving assemblies with the same structure, wherein any group of moving assemblies comprises a bottom plate, a vertical plate is connected to the bottom plate, the bottom plate and the vertical plate form a station for placing bent tubes, a boss is arranged on one side, different from the side for placing the bent tubes, of the vertical plate, a space exists between the bosses of the two groups of moving assemblies, lugs extending to the space are arranged on the boss, and the lugs are connected with a straight tube platform through a first connecting rod; the straight pipe platform is connected with a first angle plate, two ends of the first connecting rod are respectively pivoted with the lug and the first angle plate, a matching seat is connected below the bottom plate, a screw rod is matched on the matching seat, two sections of thread sections with opposite rotation directions are arranged on the screw rod, two groups of matching seats are respectively matched on one section of thread section, and the end part of the screw rod is connected with a hand wheel; the bottom plate is provided with an L-shaped chute, the L-shaped chute consists of a transverse slot and a vertical slot which are communicated with each other, a horizontal sliding block is arranged in the transverse slot, a vertical sliding block is arranged in the vertical slot, and the horizontal sliding block and the vertical sliding block are connected in a pin joint manner through a second connecting rod; a bent pipe platform is further arranged above the bottom plate, a second angle plate is connected to the bent pipe platform, and the second angle plate is connected to the vertical sliding block; the two groups of moving components are connected through fixed-length fixed rods, and two ends of each fixed-length fixed rod are respectively connected to the horizontal sliding blocks of the two groups of moving components.

Further, the transverse groove of the L-shaped chute is positioned at one side of the vertical groove, which is close to the straight pipe; the effect that makes unidirectional rotation hand wheel reach is that control straight tube or return bend homonymy action, accords with the operation normal.

Further, the first connecting rod and the second connecting rod are identical in structural size and equal in inclination angle, and the first angle plate and the second angle plate are identical in structural size; the movable assembly is used for maintaining the straight pipe platform and the bent pipe platform to be always equal in height along with the movement of the movable assembly.

Further, the screw consists of two sections, and a connector is arranged at the end part of any section; the torque is transmitted through the connection of the connector, and the effect is to reduce the installation difficulty.

Further, the screw rod is connected with the hand wheel through a speed change gear box, the hand wheel is connected with the input end of the speed change gear box, the screw rod is connected with the output end of the speed change gear box, and a gear shaft system formed by a plurality of groups of gears is arranged in the speed change gear box; the object is to increase the output torque and to improve the control accuracy.

Further, a first pivot is arranged on the vertical plate, the cylindrical surface of the first pivot is jointed with the vertical plate, a second pivot is arranged on the plane of the first pivot, and the cylindrical surface of the second pivot is jointed with the first pivot; the first pivot and the second pivot have rotational freedom degrees; the bending pipe has the advantages that a plurality of contact points acting with the second pivot are formed on the bending pipe, single-point stress at the vertex of the bending pipe is avoided, and the bending pipe is maintained not to deform under press fitting.

Further, the first pivot is made of a magnet, and the vertical plate and the second pivot are made of magnetic materials; the function is to prevent the first pivot and the second pivot from dislocating.

Further, the bent pipe platform meets the requirement that the gravity center of the bent pipe borne by the bent pipe platform is positioned on the bent pipe platform, and/or the top of the vertical plate is connected with a top plate; the top plate has the function of limiting the bent pipe together with the bent pipe platform, so that the space occupation of the bent pipe platform is small, and the purpose of avoiding overturning based on the characteristic that the center of gravity of the bent pipe is not located on the structure of the bent pipe is achieved.

Further, a space exists between the elbow platform and the riser; the arrangement of the interval is used for meeting the arrangement of the first pivot and the second pivot and the rotation requirement after the bent pipe is abutted, and the limit effect on the first pivot and the second pivot is also realized.

Further, connecting arms are arranged on two sides of the pipe bending platform, a chute is arranged on the vertical plate, a sliding block is arranged in the chute, and the connecting arms are connected to the sliding block; the bending platform is guided and limited, so that the stability of the bending platform is improved.

Further, scales are arranged on the side of the sliding groove and used for displaying the current height of the corresponding straight pipe or the corresponding bent pipe.

Further, a second chute is arranged on the straight pipe platform, a distance plate is arranged on the second chute, the bottom of the distance plate is internally arranged in the second chute, and the distance plate can slide on the second chute; a rack is arranged on one side of the vertical plate facing the distance plate, a connecting arm of the bent pipe platform extends to the upper side of the boss, a mounting plate is arranged on the connecting arm, two groups of mutually meshed input gears and double-speed gears are arranged on the mounting plate, an output gear coaxially rotating with the double-speed gears is also arranged on the mounting plate, the input gear is meshed with the rack, and the output gear is meshed with a rack push rod;

the upper end and the lower end of the rack push rod are provided with third sliding grooves, sliding rods are respectively arranged in the third sliding grooves, and the sliding rods can slide in the third sliding grooves; the boss is pivoted to the slide bar positioned below through a pivoted third connecting rod, and the rack side of the vertical plate is pivoted to the slide bar positioned above through a fourth connecting rod;

the top of the rack push rod is provided with a wedge block with a 45-degree inclined plane, the distance plate is provided with an extension part extending to the upper part of the wedge block, a matching groove with the 45-degree inclined plane is arranged in the extension part, and the wedge block is attached to the side wall of the matching groove.

The double-speed gear is linked with the output gear to rotate anticlockwise, the rack push rod meshed with the output gear is driven to move upwards by half of the fluctuation of the pipe diameter, and the rack push rod converts the displacement of the rack push rod in the vertical direction into the displacement of the distance plate in the horizontal direction through the action of the wedge block and the matching groove, so that the fluctuation of the pipe diameter is increased at last by the distance between the two distance plates.

Further, a avoidance groove is formed in the boss, and the rack push rod is opposite to the avoidance groove; the function of the avoidance groove is to increase the installation and activity space of the rack push rod, reduce the length of the third link rod and further reduce the requirement of the third link rod on the installation space.

The utility model provides an use and have the curved pipe of straight to bear pressure equipment welding set of frock, it bears frock to bear the frock except straight curved pipe still including:

the straight-bending circular tube bearing tool is arranged in the middle of the machine, a guide column is arranged on the machine, the guide column penetrates through a matching seat of the moving assembly, carrier plates are arranged at two ends of the machine, and a plurality of sections of sliding grooves are formed in the carrier plates;

the press-fitting assembly is cooperatively arranged on the multi-section chute and is used for press-fitting the plugs at two ends of the straight pipe or the bent pipe in a direction perpendicular to the end face of the pipe fitting; the device comprises a mounting table, wherein a die clamping device and a press-mounting cylinder are arranged on the mounting table, a pneumatic output port of the press-mounting cylinder is provided with a press shaft, and the other end of the press shaft is connected with the die clamping device; the device comprises a base, a first sliding rail, a first position avoiding cylinder, a second sliding rail, a first sliding rail and a second sliding rail, wherein the first sliding rail is connected with the first sliding rail;

The machine table is provided with a main guide post, the two carrier plates are matched with the main guide post and are connected through a main screw rod, one end of the main screw rod is connected to a driving motor, and the bottom of the sliding table is matched with the multi-section sliding groove; the distance between the two carrier plates and the position of the sliding table in the multi-section sliding groove are adjusted in a combined mode, and therefore the action output direction of the press-fit air cylinder is perpendicular to the end face of the bent pipe piece.

the press-fitting assembly is cooperatively arranged on the multi-section chute and is used for press-fitting the plugs at two ends of the straight pipe or the bent pipe in a direction perpendicular to the end face of the pipe fitting; the device comprises a mounting table, wherein a die clamping device and a press-mounting cylinder are arranged on the mounting table, a pneumatic output port of the press-mounting cylinder is provided with a press shaft, and the other end of the press shaft is connected with the die clamping device; the device comprises a base, a first sliding rail, a first position avoiding cylinder, a second sliding rail, a first sliding rail and a second sliding rail, wherein the first sliding rail is connected with the first sliding rail; the device comprises a sliding table, a first sliding rail, a second sliding rail, a lug seat and a base, wherein the sliding table is arranged on the first sliding rail;

The position of the adjusting screw and the bottom table in the multi-section chute is adjusted in a combined mode, so that the action output direction of the press-fit cylinder is perpendicular to the end face of the bent pipe piece.

The press-fit welding device also comprises a barrel cover assembly, wherein the barrel shape is shown, the position to be welded, namely the matching position of the plug and the end part of the pipe fitting, is positioned in the barrel cover assembly, the press-fit welding device comprises a base, a positioning barrel and a rotary barrel which are coaxially matched are borne on the base, the positioning barrel is borne on the base, and a positioning barrel sleeve is arranged outside the rotary barrel; the inner wall of the rotary drum is provided with teeth, and is meshed with a driving gear which is connected to the output of a motor fixed on the base; the rotary drum is fixedly provided with a welding gun through a support, and the welding gun is located at one side different from the motor. The automatic welding machine has the advantages that the welding gun is enabled to turn round along with rotation of the rotary drum in the welding process, and one-time automatic continuous welding of the round pipe fitting is achieved.

Further, the welding gun is provided with a plurality of groups related to the circumferential array of the rotating drum; the welding device has the effects of accelerating welding efficiency, realizing symmetrical welding and reducing the existence of welding stress.

Further, the machine table is provided with an intersecting sliding rail, the intersecting sliding rail is provided with a sliding block, and the bottom of the base is pivoted on the sliding block; the function is that the position of the cylinder cover component on the intersecting slide rail can be adjusted, and the cylinder cover component can be adjusted according to the end face inclination angles of different bent pipes until the cylinder cover component is parallel to the end face inclination angles.

Further, the machine table is also provided with a reciprocating cylinder, and an output piston rod of the reciprocating cylinder is connected to the base. The reciprocating cylinder is used for pre-acting when taking and placing the bent pipe, pushing the cylinder cover component to slide on the intersected sliding rail, and freeing up the taking and placing space of the bent pipe.

Further, the barrel cover assembly further comprises an insulation barrel, the insulation barrel is coaxially arranged in the rotary barrel, and a heating rod is arranged on the circumference of the insulation barrel; the heating rod has the function of generating high temperature, realizing pre-welding preheating and post-welding heat treatment so as to reduce the generation probability of delayed cracks and reheat cracks, and the heat insulation cylinder has the function of avoiding deformation influence of the positioning cylinder and the rotating cylinder caused by the high temperature.

Further, the rotary drum comprises a long drum part and a short drum part which are connected through a fastener;

the positioning cylinder is matched with the long cylinder part, teeth are arranged on the inner wall of the short cylinder part, and the heat insulation cylinder is connected with the long cylinder part through a stay bar; the purpose is to facilitate assembly.

The beneficial effects are that: compared with the prior art, the straight-bending circular tube bearing tool can be suitable for synchronous press-fitting welding operation of plugs at two ends of a straight tube and an elbow, can perform double-head press-fitting and continuous ring welding operation on two elbows of a single product at one time, has high efficiency, and is particularly suitable for elbow fittings; the invention is also suitable for straight and bent pipes with different specifications and sizes, and particularly can be adjusted and positioned at multiple points according to the bent pipe fittings, so that the condition that the bent pipe is scrapped due to press mounting deformation is avoided, the press mounting assembly is kept perpendicular to the end face and the barrel cover assembly is kept parallel to the end face according to the shape of the bent pipe, and the press mounting welding quality is ensured.

Drawings

Fig. 1: the invention relates to a structural schematic diagram of a straight-bending circular tube bearing tool;

fig. 2: an enlarged schematic view of the structure at a in fig. 1;

fig. 3: an enlarged schematic view of the structure at B in fig. 1;

fig. 4: a schematic structural diagram at C in fig. 1;

fig. 5: a top view of the moving assembly;

fig. 6: a top view effect diagram of the movable assembly for placing the elbow fitting;

fig. 7: in the embodiment 1, a structure schematic diagram of a press-fitting device with a straight-bending round pipe bearing tool is applied;

fig. 8: a schematic structural diagram of the press-fit assembly in embodiment 1;

fig. 9: in the embodiment 2, a structure schematic diagram of a press-fitting device with a straight-bending round pipe bearing tool is applied;

fig. 10: a schematic structural diagram of the press-fit assembly in embodiment 2;

fig. 11: a matched schematic diagram of the press-fit assembly and the arc groove section;

fig. 12: a matching schematic diagram of the press-fitting assembly on the straight groove section;

fig. 13: a structural schematic of the cartridge housing assembly;

fig. 14: a structural cross-section of the drum;

fig. 15: a top view of the cartridge housing assembly on the intersecting slide rails;

in the figure:

the straight and curved circular tube bearing tool 100;

the bottom plate 1, the L-shaped sliding groove 101, the transverse groove 102, the vertical groove 103, the vertical plate 2, the sliding groove 201, the boss 3, the clearance groove 301, the lug 4, the first connecting rod 5, the straight pipe platform 6, the second sliding groove 601, the first corner plate 7, the matching seat 8, the screw 9, the hand wheel 10, the horizontal sliding block 11, the vertical sliding block 12, the second connecting rod 13, the bent pipe platform 14, the connecting arm 141, the second corner plate 15, the fixed length rod 16, the connector 17, the first pivot 18, the second pivot 19, the top plate 20, the distance plate 21, the extension 211, the matching groove 212, the rack 22, the mounting plate 23, the input gear 24, the output gear 25, the rack push rod 26, the third sliding groove 261, the sliding rod 27, the third lug 28, the third connecting rod 29, the fourth connecting rod 30 and the wedge 31;

A machine 200;

guide post 32, carrier plate 33, multi-section chute 34, arc chute section 341, straight chute section 342, main guide post 42, main screw 43;

the press-fit assembly 300;

mounting table 35, clamping device 36, press fitting cylinder 37, pressing shaft 38, sliding table 39, straight groove matching part 391, arc groove matching part 392, first sliding rail 40, avoiding cylinder 41, bottom table 44, second sliding rail 45, ear seat 46, adjusting screw 47, butterfly bolt 48;

a cartridge housing assembly 400;

base 49, positioning cylinder 50, rotary cylinder 51, long cylinder 511, short cylinder 512, drive gear 52, bracket 53, welding gun 54, intersecting slide rail 55, slider 56, reciprocating cylinder 57, heat insulating cylinder 58, stay 59, heating rod 60, and bolt 61.

Detailed Description

A specific embodiment of the present invention will be described in detail below with reference to fig. 1-15.

Referring to fig. 1-4, a straight bending round pipe bearing tool 100 is used for placing a bending round pipe (hereinafter referred to as a bent pipe) to be pressed and welded (hereinafter referred to as a pressure welding) plug, and comprises two groups of moving assemblies with identical structures, wherein any group of moving assemblies comprises a bottom plate 1, a vertical plate 2 is connected to the bottom plate 1, the bottom plate 1 and the vertical plate 2 form a bent pipe placing station, a bent pipe to be pressed is placed on the bent pipe station, two ends of the bent pipe are clamped by pressing assemblies 300, the pressing assemblies 300 press the plug at two ends of the bent pipe, two ends of the bent pipe are stressed against the vertical plate 2, and the bent pipe is balanced at the bent pipe station under the action of external force.

One side of riser 2, which is different from the side on which the bent pipe is placed, is provided with a boss 3, an interval exists between the bosses 3 of the two groups of moving assemblies, lugs 4 extending to the interval are arranged on the boss 3, the lugs 4 are connected with a straight pipe platform 6 through a first connecting rod 5, and the straight pipe platform 6 is used for bearing a straight pipe (hereinafter referred to as a straight pipe).

In practical production, based on the undetectable and diversified characteristics of consumer preference in the market, a product is often designed to produce a plurality of similar models to form a product series, and the differences in the series are not great, and the main differences are that patterns, colors and shapes are basically consistent, and only the sizes are different, namely, the pipe diameters of the bent pipe and the straight pipe are not unique. According to the conventional principle, the height of the driving part for clamping the plug is generally constant or the difficulty and cost for adaptively and follow-up adjusting the height of the driving device according to the pipe diameter are too high. Therefore, the straight-bending circular tube bearing tool can directly adjust the height of the straight bent tube according to the change of the pipe diameter, and maintains the straight bent tube to be coaxial with the press-fit plug: for the adjustment of the straight pipe, the distance between the two groups of moving components can be adjusted, and the two ends of the first connecting rod 5 are respectively pivoted with the lug 4 and the straight pipe platform 6, so that the straight pipe platform is lifted along with the change of the distance between the two groups of moving components, and the height of the straight pipe placed on the straight pipe platform is changed along with the change of the distance between the two groups of moving components; for the bent pipe, the part for bearing the bent pipe, such as the bottom plate, is arranged to be in an adjustable movable state, so that the part can be adjusted along with the change of the pipe diameter of the bent pipe to maintain the end part of the bent pipe coaxial with the plug.

The control end for controlling the movement of the two moving assemblies and the control end for controlling the bearing bent pipe component can be two independent groups or can be a preferable group, and as the preferable embodiment, only one group for common control is arranged:

the straight pipe platform 6 is connected with the first angle plate 7, two ends of the first connecting rod 5 are respectively pivoted with the lugs 4 and the first angle plate 7, the lower part of the bottom plate 1 is connected with a matching seat 8, a screw rod 9 is matched on the matching seat 8, two sections of threaded sections with opposite rotation directions are arranged on the screw rod 9, two groups of matching seats 8 are respectively matched on one section of threaded section, the end part of the screw rod 9 is connected with a hand wheel 10, the hand wheel 10 is controlled to rotate so as to drive the screw rod 9 to rotate, and the unidirectional rotation of the threaded section with opposite rotation directions is used for controlling the two groups of moving assemblies to approach or separate from each other, so that the purpose of adjusting the placing height of the straight pipe according to the pipe fitting of the straight pipe is achieved through the first connecting rod 5;

an L-shaped chute 101 is arranged on the bottom plate 1 and consists of a horizontal groove 102 and a vertical groove 103 which are communicated, a horizontal sliding block 11 is arranged in the horizontal groove 102, a vertical sliding block 12 is arranged in the vertical groove 103, and the horizontal sliding block 11 and the vertical sliding block 12 are connected in a pivoted mode through a second connecting rod 13; a bent pipe platform 14 is further arranged above the bottom plate 1, a bent pipe to be pressed and welded is placed on the bent pipe platform 14, a second angle plate 15 is connected to the bent pipe platform 14, and the second angle plate 15 is connected to the vertical sliding block 12; the two groups of moving components are connected through a fixed-length fixed rod 16, and two ends of the fixed-length fixed rod 16 are respectively connected to the horizontal sliding blocks 11 of the two groups of moving components.

According to the geometric relationship, the horizontal groove 102 and the vertical groove 103 are vertically intersected, the length of the second connecting rod 13 is constant, so that the sliding displacement of the horizontal sliding block 11 in the horizontal groove 102 is converted into the sliding displacement of the vertical sliding block 12 in the vertical groove 103, namely, the L-shaped sliding groove 101 and the second connecting rod 13 have the functions of converting the horizontal movement of the horizontal sliding block 11 into the vertical movement of the vertical sliding block 12, when the screw 9 drives two groups of moving components to approach or separate, the horizontal sliding block 11 is stationary in an absolute space position based on the constant length of the fixed length rod 16, and after the moving components move, the position of the horizontal sliding block 11 in the horizontal groove 102 is found to be changed, and then the height of the vertical sliding block 12 in the vertical groove 103 is changed, and finally the height of the bent pipe platform 14 is adjusted.

In this embodiment, the transverse slot 102 of the L-shaped chute 101 is located at one side of the vertical slot 103 near the straight pipe, which is used to control the straight pipe or the bent pipe to move in the same direction by the effect of unidirectional rotation of the hand wheel 10, and the situation that the straight pipe is moved up in height and the bent pipe is moved down in height or the bent pipe is moved up in height and the straight pipe is moved down in height will not occur, taking the case that the hand wheel 10 controls the two moving components to move away from each other in opposite directions as an example: at this time, the included angle of the first connecting rod 5 is increased so as to link the height of the straight pipe platform 6 to descend, and the height of the straight pipe placed on the straight pipe platform is lowered along with the height; and based on the fact that the position of the horizontal sliding block 11 is unchanged and the length of the second connecting rod 13 is constant, the linkage vertical sliding block 12 moves downwards when the moving assembly moves, and then the bent pipe platform 14 is driven to descend, so that the same-direction action characteristics that the straight pipe and the bent pipe are both high-descending are met, and the operation is normal.

The first connecting rod 5 and the second connecting rod 13 have the same structural size and the same inclination angle, and the first angle plate 7 and the second angle plate 15 have the same structural size and are used for keeping the straight pipe platform 6 and the bent pipe platform 14 at the same height all the time along with the movement of the moving assembly.

In this embodiment, the screw 9 is composed of two sections, and the end of any section is provided with a connector 17, and torque is transmitted through connection of the connector 17, so as to reduce the installation difficulty.

The screw rod 9 is connected with the hand wheel 10 through a speed change gear box, the hand wheel 10 is connected with the input end of the speed change gear box, the screw rod 9 is connected with the output end of the speed change gear box, the speed change gear box is internally provided with a gear shaft system formed by a plurality of groups of gears, the aim of increasing output torque is achieved, meanwhile, the control precision is improved, the pipe diameter range is small, the adjusting range is also small according to common knowledge, the input and output rotation speed ratio needs to be increased to ensure the adjusting precision, and a means for achieving the technical aim through the gear shaft system is a conventional technology, and the embodiment is not further explained.

Referring to fig. 5-6, when the elbow is pressed, the middle of the elbow is abutted against the riser 2, the pressure at two ends of the elbow is balanced with the thrust of the riser 2 on the elbow, the pressing force is large, and the elbow has a deformation risk, so in this embodiment, the riser 2 is provided with a first pivot 18, the cylindrical surface of the first pivot 18 is attached to the riser 2, the plane of the first pivot is attached with a second pivot 19, the cylindrical surface of the second pivot 19 is attached to the first pivot 18, the first pivot 18 and the second pivot 19 have rotational degrees of freedom, and the elbow acts on the second pivot 19 under the pushing of the pressing force to push the first pivot 18 and the second pivot 19 to rotate. The first pivot 18 and the second pivot 19 are arranged, so that a plurality of contact points which are acted with the second pivot 19 exist on the bent pipe, the condition that single-point stress is generated at the vertex of the bent pipe piece is avoided, and the bent pipe piece is kept not to deform under press fitting.

Further, the first pivot 18 uses a magnet, and the riser 2 and the second pivot 19 are made of a magnetic material, such as iron, so as to prevent the first pivot 18 and the second pivot 19 from dislocating.

After the elbow is placed on the elbow platform 14, based on the shape characteristics, the gravity center point of the elbow is not located on the actual structure, in order to maintain the static state, the area or width of the elbow platform 14 meets the gravity center of the elbow carried by the elbow platform 14 and/or, preferably, the top of the riser 2 is connected with the top plate 20, and the top plate 20 plays a role of limiting the elbow together with the elbow platform 14, so that the space occupation of the elbow platform 14 can be small.

The space exists between the pipe bending platform 14 and the vertical plate 2, the space is used for meeting the arrangement of the first pivot 18 and the second pivot 19 and the rotation requirement after the pipe bending is abutted, and the pipe bending platform 14 also has the limiting effect on the first pivot 18 and the second pivot 19 to avoid dislocation.

Referring to fig. 1 again, the connecting arms 141 are disposed on two sides of the elbow platform 14, the vertical plate 2 is provided with a sliding groove 201, the sliding groove 201 is internally provided with a sliding block, the connecting arms 141 are connected to the sliding block, the sliding groove 201 can be a T-shaped sliding groove, the sliding block slides in the sliding groove 201, and the sliding groove 201 is used for guiding and limiting the elbow platform 14 and improving the stability of the elbow platform 14.

The chute 201 side is provided with scales for displaying the current height of the corresponding straight pipe or bent pipe, specifically, in this embodiment, the height of the bottom surface of the top plate 20 is used as a zero-degree scale value, the straight pipe platform 6 and the bent pipe platform 14 are always equal in height, according to the pipe diameter adjusting hand wheel 10 of the straight bent pipe, after the hand wheel 10 rotates for the same number of cycles, the change of the straight pipe and the bent pipe in height is the same, the scale straight pipe on the chute 201 side displays the height for representing the current straight pipe and the bent pipe, and when the scale value is exposed as a target pipe diameter value, the process is stopped, and the straight bent pipe is placed on a station.

Referring to fig. 1 and 3, the straight pipe platform 6 is provided with a second chute 601, the second chute 601 is provided with a distance plate 21, the bottom of the distance plate 21 is internally provided with the second chute 601, and the distance plate 21 can slide on the second chute 601; a rack 22 is arranged on one side of the vertical plate 2 facing the distance plate 21, a connecting arm 141 of the pipe bending platform 14 extends to the position above the boss 3, a mounting plate 23 is arranged on the connecting arm 141, two groups of mutually meshed input gears 24 and double-speed gears (not shown) are arranged on the mounting plate 23, an output gear 25 coaxially rotating with the double-speed gears is also arranged on the mounting plate 23, the input gear 24 is meshed with the rack 22, the output gear 25 is meshed with a rack push rod 26, and the input gear 24, the double-speed gears and the output gear 25 have the function of halving and outputting the displacement of an input end; the upper end and the lower end of the rack push rod 26 are provided with third slide grooves 261, the third slide grooves 261 are respectively provided with a slide bar 27, and the slide bars 27 can slide in the third slide grooves 261; the boss 3 is respectively pivoted with a third connecting rod 29 through two third lugs 28, the third connecting rod 29 is pivoted to a slide rod 27 positioned below, the rack side of the vertical plate 2 is pivoted to the slide rod 27 positioned above through a fourth connecting rod 30, the third connecting rod 29 and the fourth connecting rod 30 have the function of maintaining the rack push rod 26 in a vertical state, and the meshing action of the gear 24 and the rack push rod 26 changes the height of the rack push rod 26; the top of the rack push rod 26 is provided with a wedge 31 with a 45-degree inclined surface, the distance plate 21 is provided with an extension part 211 extending to the upper side of the wedge 31, the extension part 211 is internally provided with a matching groove 212 with the 45-degree inclined surface, and the wedge 31 is attached to the side wall of the matching groove 212 and is used for converting the displacement of the rack push rod 26 in the vertical direction into the displacement of the distance plate 21 in the horizontal direction.

Principle of: according to the foregoing, the height of the straight pipe platform 6 and the bent pipe platform 14 is adjusted according to the pipe diameter, that is, the displacement of the straight pipe platform 6 and the bent pipe platform 14 in the vertical direction, that is, the fluctuation of the pipe diameter, while the straight pipe and the bent pipe are round pipes, so that the distance between the distance plates 21 is also changed by equal distances, based on this thought, taking the replacement of a larger pipe diameter as an example, the bent pipe platform 14 moves down by a pipe diameter difference value, the linkage input gear 24 is meshed with the rack 22, the input gear 24 rolls on the rack 22, and rotates clockwise as shown in the drawing, and the meshing speed-doubling gear rotates counterclockwise, the speed-doubling gear synchronously rotates counterclockwise, so as to drive the rack push rod 26 meshed with the output gear 25 to move upward by half the fluctuation of the pipe diameter, while the straight pipe platform 6 and the bent pipe platform 14 are always equal in height, the rack push rod 26 converts the displacement of the rack push rod 26 in the vertical direction into the displacement of the distance plates 21 in the horizontal direction through the effect of the wedge 31 and the matching groove 212, that finally, that the distance between the two distance plates 21 increases the fluctuation of the pipe diameter.

The two sides of the straight pipe platform 6 are respectively and indirectly acted by the distance plate 21 and the rack push rod 26, the acting force of the rack push rod 26 on the distance plate 21 also has the function of maintaining the straight pipe platform 6 to be horizontal, and at the moment, the connection mode of the first corner plate 7 and the first connecting rod 5 can adopt a pivot mode which is easy to install and has lower implementation cost.

The boss 3 is provided with a clearance groove 301, the rack push rod 26 is opposite to the clearance groove 301, and the clearance groove 301 is used for increasing the installation and activity space of the rack push rod 26 and reducing the length of the third connecting rod 29 so as to reduce the requirement of the third connecting rod on the installation space.

Referring to fig. 6-7, the present embodiment further provides a double-plug press-fitting welding device using a straight-bending round pipe bearing tool, which includes a machine table 200 as a bearing main body in addition to the straight-bending round pipe bearing tool, the straight-bending round pipe bearing tool 100 is disposed in a middle position of the machine table 200, and a guide post 32 is disposed on the machine table 200, and penetrates through a matching seat 8 of the moving component, so as to bear the weight of the moving component, reduce the load of the screw 9 to avoid thread damage, and guide the movement of the moving component; the two ends of the machine table 200 are provided with carrier plates 33, the carrier plates 33 are provided with a plurality of sections of sliding grooves 34 and press-fitting components 300, the press-fitting components 300 are matched with the sections of sliding grooves 34, and the press-fitting components 300 are used for press-fitting plugs at two ends of a straight pipe or a bent pipe in a direction perpendicular to the end face of the pipe.

The press-fitting assembly 300 comprises a mounting table 35, wherein a die clamper 36 for clamping a plug is arranged on the mounting table 35, the plug to be press-fitted is clamped by the die clamper, the die clamper 36 releases the plug and resets after press-fitting, the die clamper 36 is in the prior art, and the embodiment is not excessively described; the mounting table 35 is also fixedly provided with a press-fit cylinder 37, a pneumatic output port of the press-fit cylinder 37 is provided with a press shaft 38, the press shaft 38 is sealed with the inner wall of the pneumatic output port of the press-fit cylinder 37 through a sealing ring, the sealing ring has the function of avoiding the leakage of compressed gas in the press-fit cylinder 37, the other end of the press shaft 38 is connected with a die clamping device 36, the press shaft 38 stretches under the pneumatic pressure of the press-fit cylinder 37, and the die clamping device 36 is driven to stretch forwards to realize the purposes of press-fitting a plug and returning the die clamping device 36 to reset the die clamping device.

The press-fitting assembly 300 further comprises a sliding table 39, the sliding table 39 is provided with a first sliding rail 40 and a avoidance cylinder 41, the installation table 35 is connected to the first sliding rail 40, an output rod of the avoidance cylinder 41 is connected to the installation table 35, and the avoidance cylinder 41 controls the installation table 35 and components installed on the installation table. The purpose of setting the avoidance cylinder 41 is: the mounting table 35 is driven to act so as to break through the limitation of small action amplitude of the press-fit air cylinder 37, the distance between the two press-fit assemblies 300 is increased, for the bent pipe, the straight-bent circular pipe bearing tool is a lateral opening, the bent pipe is pushed into the straight-bent circular pipe bearing tool in the lateral direction, the distance between the two press-fit assemblies 300 can be controlled by the pre-pushing position-avoiding air cylinder 41 to be larger than the length of a bent pipe piece, the bent pipe can be pushed into the tool by a mechanical arm, automatic feeding and material taking are achieved, the post-placement position-avoiding air cylinder 41 acts firstly to push the base and the mounting table 35, and after the end part of the bent pipe piece is close to the end part of the straight pipe or the bent pipe, the press-fit air cylinder 37 acts to achieve press-fitting of the plug.

According to common sense or the baking rack products provided by the background technology, two bent pipes positioned on two sides exist in a single baking rack product, and the two groups of moving assemblies in the embodiment can just press-fit the plugs on two ends of the two bent pipes at one time. As described above, the drying rack is various in model size with the development day and month, based on this actual situation, the embodiment can also be adjusted according to the size of the bent pipe fitting, and the bent pipe fitting with influence on the invention is characterized by length, end face inclination angle and pipe diameter, the adjustment of pipe diameter can be achieved through the straight bent pipe bearing tool, and the plug corresponding to pipe diameter can be adjusted through the die clamper, and is more mainly characterized by the adaptive adjustment of length and end face inclination angle.

Referring to fig. 7-8, in one embodiment 1,

for the adaptive adjustment of the length, the carrier plates 33 provided at two ends of the machine 200 are set to be in a movable adjustable state, the press-mounting assembly 300 is disposed on the carrier plates 33, the machine 200 is further provided with a main guide post 42, the two carrier plates 33 are matched with the main guide post 42, the carrier plates 33 can move on the main guide post 42 to change the interval therebetween, as mentioned above, the press-mounting assembly 300 bears a great reverse thrust during press-mounting, so that the position of the press-mounting assembly 300 needs to be fixed during press-mounting, the two carrier plates 33 are connected through a main screw 43, one end of the main screw 43 is connected to a driving motor, the driving motor drives the main screw 43 to rotate, and the main screw 43 drives the two carrier plates 33 connected with the main screw to move closer to or away from each other synchronously, the main screw 43 has the function of adjusting the two carrier plates 33 by a single input, and simultaneously has the self-locking effect, and maintains the fixed position of the press-mounting assembly 300 during press-mounting;

for the adaptive adjustment of the inclination angle of the end surface, the carrier plate 33 is provided with a plurality of sections of sliding grooves 34, the bottom of the press-fitting assembly 300 is provided with a part matched with the sections of sliding grooves 34, and the position of the press-fitting assembly 300 in the arc groove can be changed;

By jointly adjusting the distance between the two carrier plates 33 and the position of the press-fitting assembly 300 in the multi-section chute 34, the action output direction of the press-fitting cylinder 37 is vertical to the end face of the bent pipe fitting, and the adjustment range is large in the embodiment, so that the device can adapt to straight pipes with various lengths and bent pipes with various radians.

Referring to fig. 9-10, in another embodiment 2,

for the adaptive adjustment of the length, the press-fit assembly 300 further comprises a bottom table 44, a second sliding rail 45 and an ear seat 46 are arranged on the bottom table 44, the sliding table 39 is arranged on the second sliding rail 45, an adjusting screw 47 is matched on the ear seat 46, and one end of the adjusting screw 47 is connected to the sliding table 39; the adjusting screw 47 is used for pushing the sliding table 39 to slide on the second sliding rail 45 after rotating, so as to change the length of the mounting table 35 extending out of the carrier plate, namely, change the distance between the mounting table and the end part of the bent pipe;

for the adaptive adjustment of the inclination angle of the end face, the position of the press-fitting assembly 300 in the arc groove can be changed, the bottom of the press-fitting assembly 300 is provided with a part matched with the multi-section sliding groove 34, and the press-fitting direction of the output of the press-fitting assembly can be changed by changing the position of the press-fitting assembly in the multi-section sliding groove 34 arranged on the carrier plate 33;

by adjusting the positions of the adjusting screw 47 and the press-fitting assembly 300 in the multi-stage chute 34 in a combined manner, the action output direction of the press-fitting cylinder 37 is perpendicular to the end face of the bent pipe fitting, and the adjustment range is smaller in the embodiment, so that the device can adapt to straight pipes with various lengths and bent pipes with various radians.

Referring to fig. 11-12, the multi-segment chute 34 includes symmetrical arc chute sections 341 and straight chute sections 342 connecting the two arc chute sections 341, wherein the press-fitting assembly 300 is positioned in the arc chute sections 341 when the bent pipe is press-fitted, and the press-fitting assembly 300 is positioned in the straight chute sections 342 when the straight pipe is press-fitted.

In embodiment 1, the bottom of the sliding table 39 is provided with a straight groove matching portion 391, an arc groove matching portion 392 is connected under the straight groove matching portion 391, the surface of the straight groove matching portion 391 facing the groove wall of the arc groove section 341 is a plane, the surface of the arc groove matching portion 392 facing the groove wall of the arc groove section 341 is an arc surface, and the carrier plate 33 is provided with a avoidance sink 393 on two sides of the arc groove section 341, so as to avoid the straight groove matching portion 391 when the press-fitting assembly is transited from the straight groove section to the arc groove section, so that the press-fitting assembly 300 can slide smoothly in the multi-section sliding groove 34 without side movement, that is, no matter where the press-fitting assembly is positioned in the multi-section sliding groove 34, two sides of the press-fitting assembly are attached to the side walls of the multi-section sliding groove 34. Specifically:

referring to fig. 11, when the press-fitting assembly 300 presses the bent pipe, that is, when the press-fitting assembly 300 is located at the arc groove section 341, two cambered surfaces of the arc groove matching portion 392 are attached to the groove wall of the arc groove section 341, and the straight groove matching portion 391 is in non-contact with the groove wall based on the existence of the clearance groove; referring to fig. 12, when the press-fitting assembly 300 is used for press-fitting a straight pipe, that is, when the press-fitting assembly 300 is located at the straight groove section 342, two planes of the straight groove engaging portion 391 are engaged with the groove wall of the straight groove section 342, and the arc groove engaging portion 392 is in no contact or line contact with the groove wall.

In the embodiment 2, the press-fit assembly is different from the carrier plate 33 in that only the straight groove engaging portion 391 is provided on the bottom table 44.

As mentioned above, a large press-fitting force is required during press-fitting, the press-fitting force will act on the press-fitting assembly 300, the slide table 39 in embodiment 1 or the base table 44 in embodiment 2 is provided with the butterfly bolt 48, the butterfly bolt 48 is used for positioning the press-fitting assembly 300, and after the press-fitting assembly 300 is adjusted to the correct position before press-fitting, the butterfly bolt 48 is screwed, and the butterfly bolt 48 is pressed down against the carrier plate 33 to position the press-fitting assembly 300 at the current position.

After press fitting, the plug and the pipe fitting also need to be welded and connected, at present, the main welding modes include electric welding, brazing and laser welding, the electric welding is suitable for the condition of larger wall thickness, the laser welding is suitable for thin wall welding with small bevel, and no matter what welding mode is the conventional technical means, but the invention is not embodied by the inventive point, and the embodiment is not further explained.

Referring to fig. 13, the press-fit welding device further includes a barrel cover assembly 400, the barrel cover assembly 400 presents a barrel shape, the position to be welded, i.e. the matching position of the plug and the end of the pipe fitting, is located in the barrel cover assembly 400, and the barrel cover assembly 400 can play a role in protecting from welding slag, spark spatter and strong light leakage. The cylinder cover assembly 400 comprises a base 49, wherein a positioning cylinder 50 and a rotary cylinder 51 which are coaxially matched are carried on the base 49, the positioning cylinder 50 is carried on the base 49, and the positioning cylinder 50 is sleeved outside the rotary cylinder 51; the inner wall of the rotary drum 51 is provided with teeth and meshed with a driving gear 52, the driving gear 52 is connected to the output of a motor fixed on the base 49, the motor rotates to drive the rotary drum 51 to rotate through the driving gear 52, and the positioning drum 50 is fixed on the base 49 in a static manner; the rotary drum 51 is fixedly provided with a welding gun 54 through a support 53, the welding gun 54 is positioned at one side different from the motor, and a welding gun port of the welding gun is contacted with a welding groove, so that welding operation is realized, turnover is realized along with rotation of the rotary drum 51 in the welding process, and disposable automatic continuous welding of round pipe fittings is realized.

Referring to fig. 15, the welding gun 54 is provided with a plurality of groups, preferably two or three groups, in a circumferential array with respect to the drum 51, which serves to accelerate the welding efficiency and, more importantly, to achieve a symmetrical welding and to reduce the presence of welding stresses.

The machine 200 is provided with an intersecting slide rail 55, the intersecting slide rail 55 is provided with a sliding block 56, the bottom of the base 49 is pivoted on the sliding block 56, the position of the barrel cover assembly 400 on the intersecting slide rail 55 can be adjusted, the barrel cover assembly 400 can be adjusted according to the inclination angles of the end surfaces of different bent pipes until the barrel cover assembly 400 is parallel to the end surfaces of the different bent pipes,

the machine 200 is also provided with a reciprocating cylinder 57, an output piston rod of the reciprocating cylinder 57 is connected to the base 49, and the reciprocating cylinder 57 acts in advance when taking and placing the bent pipe, so that the cylinder cover assembly 400 is pushed to slide on the intersecting sliding rail 55, and a taking and placing space of the bent pipe is reserved. It should be noted that, based on the avoidance movement of the barrel cover assembly 400, the purpose of the avoidance cylinder 41 is to drive the mounting table 35 to retract enough space, so as to avoid collision with the barrel cover assembly 400, that is, before the avoidance movement of the barrel cover assembly 400, the avoidance cylinder 41 is pre-operated to drive the mounting table 35 to retract.

For electric welding and brazing, the barrel cover assembly 400 further comprises an insulation barrel 58, the insulation barrel 58 is coaxially arranged in the rotary barrel 51, a heating rod 60 is arranged on the circumference of the insulation barrel 58, the heating rod 60 is used for generating high temperature, preheating before welding and heat treatment after welding are realized, the generation probability of delayed cracks and reheat cracks is reduced, and the insulation barrel 58 is used for avoiding deformation influence of the positioning barrel 50 and the rotary barrel 51 caused by the high temperature, namely, reducing the matching quality.

Referring to fig. 14, the heat-insulating cylinder 58 may be connected to the drum 51 by a stay 59, and as the drum 51 rotates synchronously, the drum 51 includes two parts, namely a long cylinder part 511 and a short cylinder part 512, which are fastened by bolts 61, the positioning cylinder 50 is fitted on the long cylinder part 511, the inner wall of the short cylinder part 512 is provided with teeth, and the heat-insulating cylinder 58 is connected to the long cylinder part 511, for the purpose of easy assembly.

The straight-bending circular tube bearing tool can be suitable for synchronous press-fitting welding operation of plugs at two ends of a straight tube and an elbow, can perform double-head press-fitting and continuous ring-welding operation on two elbows of a single product at one time, has high efficiency, and is particularly suitable for elbow fittings; the invention is also suitable for straight and bent pipes with different specifications and sizes, and particularly can be adjusted and positioned at multiple points according to the bent pipe fittings, so that the condition that the bent pipe is scrapped due to press mounting deformation is avoided, the press mounting assembly is kept perpendicular to the end face and the barrel cover assembly is kept parallel to the end face according to the shape of the bent pipe, and the press mounting welding quality is ensured.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Straight curved pipe bears frock, its characterized in that: comprises two groups of moving components with consistent structures;

any group of moving components comprises a bottom plate (1), a vertical plate (2) is connected to the bottom plate (1), the bottom plate (1) and the vertical plate (2) form a station for placing bent pipes, a boss (3) is arranged on one side, different from the side for placing the bent pipes, of the vertical plate (2), a space exists between the bosses (3) of the two groups of moving components, lugs (4) extending to the space are arranged on the bosses (3), and the lugs (4) are connected with a straight pipe platform (6) through a first connecting rod (5);

the straight pipe platform (6) is connected with a first corner plate (7), two ends of the first connecting rod (5) are respectively pivoted with the lug (4) and the first corner plate (7), a matching seat (8) is connected below the bottom plate (1), a screw rod (9) is matched on the matching seat (8), two sections of thread sections with opposite rotation directions are arranged on the screw rod (9), two groups of matching seats (8) are respectively matched on one section of thread section, and the end part of the screw rod (9) is connected with a hand wheel (10);

an L-shaped sliding groove (101) is formed in the bottom plate (1), the L-shaped sliding groove is formed by a horizontal groove (102) and a vertical groove (103) which are communicated, a horizontal sliding block (11) is arranged in the horizontal groove (102), a vertical sliding block (12) is arranged in the vertical groove (103), and the horizontal sliding block (11) and the vertical sliding block (12) are connected in a pivoted mode through a second connecting rod (13); a bent pipe platform (14) is further arranged above the bottom plate (1), a second angle plate (15) is connected to the bent pipe platform (14), and the second angle plate (15) is connected to the vertical sliding block (12);

The two groups of moving components are connected through a fixed-length rod (16), and two ends of the fixed-length rod (16) are respectively connected to horizontal sliding blocks (11) of the two groups of moving components.

2. The straight and curved circular tube bearing tool according to claim 1, wherein:

the transverse groove (102) of the L-shaped chute (101) is positioned at one side of the vertical groove (103) close to the straight pipe;

the first connecting rod (5) and the second connecting rod (13) are identical in structural size and equal in inclination angle, and the first corner plate (7) and the second corner plate (15) are identical in structural size.

3. The straight and curved circular tube bearing tool according to claim 2, wherein:

the vertical plate (2) is provided with a first pivot (18), the cylindrical surface of the first pivot (18) is jointed with the vertical plate (2), the plane of the vertical plate is provided with a second pivot (19), and the cylindrical surface of the second pivot (19) is jointed with the first pivot (18); the first pivot (18) and the second pivot (19) have rotational degrees of freedom.

4. The straight and curved circular tube bearing tool according to claim 2, wherein:

the bent pipe platform (14) can ensure that the gravity center of the bent pipe borne by the bent pipe platform is positioned on the bent pipe platform (14), and/or,

The top of the vertical plate (2) is connected with a top plate (20).

5. The straight and curved circular tube bearing tool of claim 4, wherein:

a space exists between the bent pipe platform (14) and the vertical plate (2).

6. The straight and curved circular tube bearing tool according to claim 5, wherein:

connecting arms (141) are arranged on two sides of the pipe bending platform (14), a chute (201) is arranged on the vertical plate (2), a sliding block is arranged in the chute (201), and the connecting arms (141) are connected to the sliding block.

7. The straight and curved circular tube bearing tool of claim 6, wherein:

scales are arranged on the side of the sliding groove (201) and used for displaying the current height of the corresponding straight pipe or bent pipe.

8. The straight and curved circular tube bearing tool of claim 6, wherein:

a second chute (601) is arranged on the straight pipe platform (6), a distance plate (21) is arranged on the second chute (601), the bottom of the distance plate (21) is internally arranged in the second chute (601), and the distance plate (21) can slide on the second chute (601); a rack (22) is arranged on one side of the vertical plate (2) facing the distance plate (21), a connecting arm (141) of the bent pipe platform (14) extends to the upper part of the boss (3), a mounting plate (23) is arranged on the connecting arm (141), two groups of mutually meshed input gears (24) and double-speed gears are arranged on the mounting plate (23), an output gear (25) coaxially rotating with the double-speed gears is also arranged on the mounting plate (23), the input gear (24) is meshed with the rack (22), and the output gear (25) is meshed with a rack push rod (26);

The upper end and the lower end of the rack push rod (26) are provided with third sliding grooves (261), sliding rods (27) are respectively arranged in the third sliding grooves (261), and the sliding rods (27) can slide in the third sliding grooves (261); the boss (3) is pivoted to a slide bar (27) positioned below through a pivoted third connecting rod (29), and the rack side of the vertical plate (2) is pivoted to the slide bar (27) positioned above through a fourth connecting rod (30);

the top of the rack push rod (26) is provided with a wedge block (31) with a 45-degree inclined plane, the distance plate (21) is provided with an extension part (211) extending to the upper side of the wedge block (31), the extension part (211) is internally provided with a matching groove (212) with the 45-degree inclined plane, and the wedge block (31) is attached to the side wall of the matching groove (212).

9. A double-plug press-fit welding device applying the straight-bent circular tube bearing tool of any one of claims 1-8, further comprising:

the straight-bending circular tube bearing tool (100) is arranged in the middle of the machine table (200), a guide column (32) is arranged on the machine table (200), the guide column penetrates through a matching seat (8) of the moving assembly, carrier plates (33) are arranged at two ends of the machine table (200), and a plurality of sections of sliding grooves (34) are formed in the carrier plates (33);

The press-fit assembly (300) is cooperatively arranged on the multi-section chute (34) and is used for press-fitting the plugs at two ends of the straight pipe or the bent pipe in a direction perpendicular to the end face of the pipe fitting; the device comprises a mounting table (35), wherein a die clamping device (36) and a press-mounting air cylinder (37) are arranged on the mounting table, a pressing shaft (38) is arranged at a pneumatic output port of the press-mounting air cylinder (37), and the other end of the pressing shaft (38) is connected with the die clamping device (36); the automatic control device is characterized by further comprising a sliding table (39), wherein a first sliding rail (40) and a avoidance cylinder (41) are arranged on the sliding table (39), the mounting table (35) is connected to the first sliding rail (40), and an output rod of the avoidance cylinder (41) is connected to the mounting table (35);

the machine table (200) is provided with a main guide post (42), the two carrier plates (33) are matched with the main guide post (42), the two carrier plates (33) are connected through a main screw rod (43), one end of the main screw rod (43) is connected to a driving motor, and the bottom of the sliding table (39) is matched with the multi-section sliding groove (34); the distance between the two carrier plates (33) and the position of the sliding table (39) in the multi-section sliding groove (34) are jointly regulated, so that the action output direction of the press-fitting air cylinder (37) is perpendicular to the end face of the bent pipe fitting.

10. A double-plug press-fit welding device applying the straight-bent circular tube bearing tool as claimed in any one of claims 1 to 8, characterized in that: the method also comprises the following steps:

the press-fit assembly (300) is cooperatively arranged on the multi-section chute (34) and is used for press-fitting the plugs at two ends of the straight pipe or the bent pipe in a direction perpendicular to the end face of the pipe fitting; the device comprises a mounting table (35), wherein a die clamping device (36) and a press-mounting air cylinder (37) are arranged on the mounting table, a pressing shaft (38) is arranged at a pneumatic output port of the press-mounting air cylinder (37), and the other end of the pressing shaft (38) is connected with the die clamping device (36); the automatic control device is characterized by further comprising a sliding table (39), wherein a first sliding rail (40) and a avoidance cylinder (41) are arranged on the sliding table (39), the mounting table (35) is connected to the first sliding rail (40), and an output rod of the avoidance cylinder (41) is connected to the mounting table (35); the novel portable electronic device is characterized by further comprising a base table (44), wherein a second sliding rail (45) and an ear seat (46) are arranged on the base table (44), the sliding table (39) is arranged on the second sliding rail (45), an adjusting screw (47) is matched on the ear seat (46), and one end of the adjusting screw (47) is connected to the sliding table (39);

The positions of the adjusting screw rod (47) and the bottom table (44) in the multi-section chute (34) are jointly adjusted, so that the action output direction of the press-fitting cylinder (37) is perpendicular to the end face of the bent pipe fitting.