A tubular workpiece welding positioning device

Abstract

The present application relates to the field of tubular workpiece positioning, in particular to a tubular workpiece welding positioning device, which comprises a machining positioning table, a supporting gantry fixedly installed on the top outer surface of the machining positioning table, two groups of tubular workpieces movably sleeved on the inner side wall surface of the machining positioning table and the bottom edge position of the supporting gantry, and a hydraulic rod one fixedly installed on the inner part of the machining positioning table and the inner side wall surface of the tubular workpiece, wherein a pair of supporting columns are arranged on the output end of the hydraulic rod one. The supporting columns are extended in cooperation with the supporting columns of the hydraulic rod one, and are located on the inner side wall surface of the two groups of tubular workpieces. At this time, the slide block is pushed in cooperation with the hydraulic rod two, the auxiliary positioning swing arm on one end of the slide block is rotated with the supporting columns as the supporting point, the other end of the auxiliary positioning swing arm is extended and expanded to the outside, and then the positioning anti-skid baffle on the outer side surface of the auxiliary positioning swing arm is attached to the inner side wall surface of the tubular workpiece for positioning.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of positioning of tubular workpieces, and in particular to a tubular workpiece welding positioning device. BACKGROUND

[0002] Tubular workpieces are widely used in industrial production, such as pipelines, thermal equipment, mechanical industry, oil and gas drilling, containers, chemical industry, and special purposes, all of which require tubular workpieces. In some specific production environments, tubular workpieces need to be welded to specified positions to complete the production of mechanical equipment.

[0003] A patent with publication number CN114633069A discloses a positioning device and method for tubular workpiece welding, belonging to the field of intelligent manufacturing technology. It includes a base and multiple rollers arranged at the bottom of the base, and also includes a lifting mechanism, a rotating mechanism, a displacement mechanism, and a positioning mechanism. The lifting mechanism is arranged on the base, the rotating mechanism is arranged on the lifting mechanism, the displacement mechanism is arranged on the rotating mechanism, and the positioning mechanism is connected to the displacement mechanism to fix the position of the workpiece. A lever assembly is also arranged on the positioning mechanism to balance the positioning of the workpiece. The positioning device for tubular workpiece welding can automatically and flexibly clamp the tubular workpiece. By adjusting the distance between the two first support seats, it can accommodate tubular workpieces of different diameters. At the same time, components such as lead screws and worm gears can be self-locked to achieve stable positioning of the tubular workpiece. Multiple degrees of freedom are also provided to make the tubular workpiece suitable for different positions, facilitating the completion of welding work.

[0004] Currently, in the prior art, the connected steel pipes not only require good sealing, but also the paired pipes should minimize the shaking and have good stability. However, due to the large diameter of the pressure steel pipe, there is a problem of large misalignment and irregular connection when two pressure steel pipes are connected. The existing method requires manual adjustment of the misalignment of the pipes using a jack before welding the joint of the pressure pipe, and a small amount of movement is required when connecting the other section of the pressure pipe, which is also manually operated, time-consuming and labor-intensive.

[0005] Therefore, the present application provides a tubular workpiece welding positioning device. SUMMARY

[0006] To make up for the shortcomings of the prior art and solve at least one technical problem raised in the background art.

[0007] The technical scheme adopted by the present application to solve its technical problems is: a tubular workpiece welding positioning device, comprising a machining positioning table, a support gantry fixedly installed on the top outer surface of the machining positioning table, two groups of tubular workpieces movably sleeved on the inner side wall surface of the machining positioning table and the bottom edge position of the support gantry, a hydraulic rod one fixedly installed on the inner side wall surface of the machining positioning table and the inner side wall surface of the tubular workpiece, a pair of support columns provided on the output end of the hydraulic rod one, a pair of support columns movably sleeved on the inner side wall surface of the two groups of tubular workpieces, an inner recessed groove opened on the outer side surface of the support column, a hydraulic rod two fixedly installed on the inner side wall surface of the inner recessed groove, a sliding block fixedly connected to the output end of the hydraulic rod two, an auxiliary swing arm movably sleeved on the both side surfaces of the sliding block, an auxiliary positioning swing arm swing-connected to the inner wall surface of the inner recessed groove, and the other end of the auxiliary swing arm movably sleeved on the outer side surface of the auxiliary positioning swing arm, and a positioning anti-skid baffle movably sleeved on the inner side wall surface of the tubular workpiece movably sleeved on the outer side surface of the auxiliary positioning swing arm.

[0008] Preferably, the inner side wall surface of the inner recessed groove is fixedly connected with a limiting auxiliary strip, the outer side surface of the sliding block is movably sleeved on the outer side surface of the limiting auxiliary strip, the outer side surface of the auxiliary positioning swing arm is fixedly connected with an elastic wire, and the other end of the elastic wire is fixedly connected to the bottom surface of the positioning anti-skid baffle.

[0009] Preferably, a limiting groove is opened on the top outer side surface of the auxiliary positioning swing arm and located on the both side edge positions, the inner side wall surface of the limiting groove is movably sleeved on the both end outer side surfaces of the positioning anti-skid baffle, one end surface of the support column is fixedly connected with a gas backflow plate, and the gas backflow plate is arranged at the surface abutting position of the two groups of tubular workpieces.

[0010] Preferably, the other end of the support column is fixedly connected with a shielding plate, the output end of the hydraulic rod one is fixedly connected with a motor, and the output end of the motor is fixedly connected to the outer side surface of the shielding plate.

[0011] Preferably, a fixed column is fixedly installed on the outer side surface of the gas backflow plate and located on the four surrounding edge positions, an air suction sleeve is fixedly connected to one end of the fixed column, and a small fan is fixedly installed on the outer side surface of the air suction sleeve and located on the four surrounding edge positions of the fixed column.

[0012] Preferably, an air suction groove is opened on the inner side wall surface of the air suction sleeve and located on the four surrounding edge positions, a limiting strip is fixedly connected to the inner side wall surface of the air suction sleeve, a filter sponge layer is arranged on the outer side surface of the limiting strip, and a sealing cover is movably sleeved on the outer side surface of the air suction sleeve.

[0013] Preferably, arc-shaped overlapping grooves are arranged on the inner walls of the two sides of the processing positioning table, hydraulic retracting rods are fixedly installed on the inner walls of the processing positioning table, arc-shaped elevation plates are fixedly connected to the output ends of the hydraulic retracting rods, the outer surfaces of the arc-shaped elevation plates are movably overlapped with the inner walls of the arc-shaped overlapping grooves, and the top surfaces of the arc-shaped elevation plates are swing-connected with downward pressing counterweight plates, and the inner walls of the arc-shaped elevation plates and the downward pressing counterweight plates are movably overlapped with the outer surfaces of the tubular workpieces.

[0014] Preferably, a chute is arranged on the top outer surface of the support gantry and located at the middle position, limit sliding strips are arranged on the inner walls of the two sides of the chute, arc welding heads are arranged on the inner walls of the chute and the outer surfaces of the limit sliding strips, and the output ends of the arc welding heads are overlapped with the abutting butt joints of the two groups of tubular workpieces.

[0015] Preferably, a recessed groove is arranged on the bottom inner wall of the processing positioning table, an auxiliary hydraulic rod is arranged on the inner wall of the processing positioning table, an arc-shaped positioning pushing strip is fixedly connected to the output end of the auxiliary hydraulic rod, the bottom surface of the arc-shaped positioning pushing strip is movably overlapped with the inner wall of the recessed groove, and the outer surface of the arc-shaped positioning pushing strip is movably overlapped with the outer surface of the tubular workpiece.

[0016] Preferably, a ventilation cavity is arranged between the outer surface of the shielding plate and the tubular workpiece, and an air extraction cavity is arranged between the outer surfaces of the two groups of gas return plates and the two groups of tubular workpieces.

[0017] The beneficial effects of the present application are as follows:

[0018] 1. The tubular workpiece welding positioning device provided by the present application is used in cooperation with the extension of the hydraulic rod and the support column, and the support column is arranged on the inner walls of the two groups of tubular workpieces. At this time, the hydraulic rod is used in cooperation with the pushing of the sliding block, the auxiliary positioning swing arm on one end of the sliding block is rotated with the support column as the support point, the other end of the auxiliary positioning swing arm is extended outward, the positioning anti-skid baffle on the outer surface of the auxiliary positioning swing arm is positioned on the inner walls of the tubular workpieces, and the contact area and the contact range between the auxiliary positioning swing arm and the inner walls of the tubular workpieces can be greatly increased. When the tubular workpieces are rotated, different surfaces of the tubular workpieces can be subjected to the same extrusion and pushing, and the tubular workpieces will not be bent in a small range due to the change of the extrusion and pushing force.

[0019] 2. The tubular workpiece welding positioning device, the hydraulic rod is pushed to the two pairs of sliding blocks, when the sliding block moves, the position of the sliding block is limited by the limiting auxiliary strip, so that the sliding block moves horizontally, under the condition that the position of one end of the auxiliary positioning swing arm and the length of the auxiliary swing arm are unchanged, the auxiliary positioning swing arm is turned up with the support column as the support point, the positioning anti-skid baffle on the outer surface of the auxiliary positioning swing arm is attached to the inner side wall of the tubular workpiece, when the size of the tubular workpiece is larger, the positioning anti-skid baffle is elastically pushed by the elastic wire, so that the positioning anti-skid baffle is preferentially lapped on the inner side wall of the tubular workpiece, and the position of the positioning anti-skid baffle is limited, with the auxiliary positioning swing arm expanding continuously, the elastic wire is compressed, so that the positioning anti-skid baffle is clamped into the inner side wall of the limiting groove for position limiting, thereby increasing the expansion range and area of the auxiliary positioning swing arm.

[0020] 3. The tubular workpiece welding positioning device, the plurality of auxiliary positioning swing arms are expanded at the same time, so that the auxiliary positioning swing arm can be completely in the center position of the inner side of the tubular workpiece, so that the tubular workpiece can rotate around the support column when moving and rotating subsequently, the tubular workpiece will not produce too large swing amplitude, thereby the tubular workpiece is limited in position under the pushing of the auxiliary positioning swing arm. BRIEF DESCRIPTION OF DRAWINGS

[0021] The application will be further described below with reference to the drawings.

[0022] Figure 1 is a perspective view of the application;

[0023] Figure 2 is a cross-sectional perspective view of the processing positioning table in the application;

[0024] Figure 3 is a cross-sectional perspective view of the arc-shaped positioning pushing strip in the application;

[0025] Figure 4 is an auxiliary positioning swing arm expansion cross-sectional view in the application;

[0026] Figure 5 is an auxiliary positioning swing arm folding cross-sectional view in the application;

[0027] Figure 6 is an auxiliary positioning swing arm cross-sectional view in the application;

[0028] Figure 7 is an arc-shaped cushioning plate cross-sectional view in the application;

[0029] Figure 8 is a gas backflow plate cross-sectional view in the application;

[0030] Figure 9 This is a three-dimensional sectional view of the gas reflux plate in this invention.

[0031] In the diagram: 11. Machining positioning table; a1. Arc-shaped overlap groove; a2. Hydraulic retraction rod; a3. Arc-shaped raised plate; a4. Downward counterweight plate; 111. Recessed groove; 112. Auxiliary hydraulic rod; 113. Arc-shaped positioning push bar; 12. Support gantry frame; 121. Slide groove; 122. Limiting slide bar; 123. Arc welding head; 13. Tubular workpiece; 14. Hydraulic rod one; 141. Motor; 142. Baffle plate; 143. Support Column; 144. Recessed groove; 145. Limiting auxiliary strip; 146. Hydraulic rod II; 147. Slider; 148. Auxiliary swing arm; 149. Auxiliary positioning swing arm; 1410. Elastic wire; 1411. Positioning anti-slip baffle; 1412. Gas return plate; 1413. Limiting groove; c1. Fixed column; c2. Air extraction sleeve; c3. Small fan; c4. Air extraction groove; c5. Limiting strip; c6. Filter sponge layer; c7. Sealing cover. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] like Figures 1 to 7 As shown, an embodiment of the present invention provides a tubular workpiece welding positioning device, comprising a processing positioning table 11 and a supporting gantry 12 fixedly installed on the top outer surface of the processing positioning table 11, two sets of tubular workpieces 13 movably sleeved on the inner wall of the processing positioning table 11 and the bottom edge of the supporting gantry 12, a hydraulic rod 14 fixedly installed inside the processing positioning table 11 and on the inner wall of the tubular workpieces 13, a pair of support columns 143 provided on the output end of the hydraulic rod 14, the pair of support columns 143 being movably sleeved on the inner wall of the two sets of tubular workpieces 13 respectively, and the outer side of the support columns 143... An indented groove 144 is formed on the side surface. A hydraulic rod 146 is fixedly installed on the inner wall of the indented groove 144. A slider 147 is fixedly connected to the output end of the hydraulic rod 146. An auxiliary swing arm 148 is movably sleeved on both sides of the slider 147. An auxiliary positioning swing arm 149 is oscillatingly connected to one side of the inner wall of the indented groove 144. The other end of the auxiliary swing arm 148 is movably sleeved on the outer surface of the auxiliary positioning swing arm 149. A positioning anti-slip baffle 1411 is movably sleeved on the outer surface of the auxiliary positioning swing arm 149 and movably overlaps the inner wall of the tubular workpiece 13.

[0034] The hydraulic rod one 14 is matched to extend the support column 143, and the support column 143 is on the inner side wall surface of the two groups of tubular workpieces 13. At this time, the hydraulic rod two 146 is matched to push the sliding block 147, and the auxiliary positioning swing arm 149 on one end of the sliding block 147 is rotated with the support column 143 as the support point, and the other end of the auxiliary positioning swing arm 149 is extended and expanded to the outside, and then the positioning anti-skid baffle 1411 on the outer side surface of the auxiliary positioning swing arm 149 is matched and positioned on the inner side wall surface of the tubular workpiece 13. Since the plurality of auxiliary positioning swing arms 149 are simultaneously expanded, the contact area and contact range between the plurality of auxiliary positioning swing arms 149 and the inner side wall surface of the tubular workpiece 13 can be greatly increased, so that the tubular workpiece 13 can be subjected to the same extrusion and pushing during rotation, and the tubular workpiece 13 will not be bent slightly due to the change of the extrusion and pushing force during rotation.

[0035] The plurality of auxiliary positioning swing arms 149 are simultaneously expanded, so that the auxiliary positioning swing arm 149 can be completely positioned at the center of the inner side of the tubular workpiece 13, so that the tubular workpiece 13 can be rotated with the support column 143 as the center point during subsequent movement and rotation, and the tubular workpiece 13 will not produce a large swing amplitude, thereby achieving the effect of limiting the position of the tubular workpiece 13 under the pushing of the auxiliary positioning swing arm 149.

[0036] As shown in Figure 1 , Figures 3 to 6 and Figure 8 , the inner wall surface of the two sides of the recessed groove 144 is fixedly connected with a limiting auxiliary strip 145, the outer side surface of the sliding block 147 is movably connected with the outer side surface of the limiting auxiliary strip 145, the outer side surface of the auxiliary positioning swing arm 149 is fixedly connected with an elastic wire 1410, the other end of the elastic wire 1410 is fixedly connected with the bottom surface of the positioning anti-skid baffle 1411, the top outer side surface of the auxiliary positioning swing arm 149 and located at the two side edge positions is provided with a limiting groove 1413, the inner side wall surface of the limiting groove 1413 is movably connected with the outer side surface of the two ends of the positioning anti-skid baffle 1411, one end surface of the support column 143 is fixedly connected with a gas return plate 1412, the position of the gas return plate 1412 is arranged at the surface matching position of the two groups of tubular workpieces 13, the other end of the support column 143 is fixedly connected with a shielding plate 142, the output end of the hydraulic rod one 14 is fixedly connected with a motor 141, and the output end of the motor 141 is fixedly connected with the outer side surface of the shielding plate 142.

[0037] The hydraulic rod two 146 pushes the sliding block 147, and when the sliding block 147 moves, the limiting auxiliary strip 145 limits the position of the sliding block 147, so that the sliding block 147 moves horizontally. Since the position of one end of the auxiliary positioning swing arm 149 and the length of the auxiliary swing arm 148 are unchanged, the auxiliary positioning swing arm 149 is turned up with the support column 143 as the support point, and the positioning anti-skid baffle 1411 on the outer surface of the auxiliary positioning swing arm 149 is attached to the inner side wall of the tubular workpiece 13. When the size of the tubular workpiece 13 is large, the elastic wire 1410 elastically pushes the positioning anti-skid baffle 1411, so that the positioning anti-skid baffle 1411 is preferentially overlapped on the inner side wall of the tubular workpiece 13, and the position of the positioning anti-skid baffle 1411 is limited. With the continuous expansion of the auxiliary positioning swing arm 149, the elastic wire 1410 is compressed, so that the positioning anti-skid baffle 1411 is clamped into the inner side wall of the limiting groove 1413 for position limiting, thereby increasing the expansion range and area of the auxiliary positioning swing arm 149.

[0038] When the size of the tubular workpiece 13 is small, the positioning anti-skid baffle 1411 on the outer surface of the auxiliary positioning swing arm 149 will preferentially attach to the inner side wall of the tubular workpiece 13, and with the continuous expansion of the auxiliary positioning swing arm 149, the elastic wire 1410 is compressed, and through the reverse pushing force of the elastic wire 1410, the friction and extrusion force between the positioning anti-skid baffle 1411 and the inner side wall of the tubular workpiece 13 is increased.

[0039] As shown in Figures 1 to 3 and Figure 7 , the inner wall of the machining positioning table 11 is provided with an arc-shaped overlapping groove a1, and the inner wall of the machining positioning table 11 is fixedly installed with a hydraulic contraction rod a2, and the output end of the hydraulic contraction rod a2 is fixedly connected with an arc-shaped lifting plate a3, and the outer surface of the arc-shaped lifting plate a3 is movably connected with the inner wall of the arc-shaped overlapping groove a1. The top surface of the arc-shaped lifting plate a3 is swing-connected with a downward counterweight plate a4, and the inner walls of the arc-shaped lifting plate a3 and the downward counterweight plate a4 are movably connected with the outer surface of the tubular workpiece 13.

[0040] When the two groups of tubular workpieces 13 move to the middle position of the machining positioning table 11, the arc-shaped lifting plate a3 is extended and pushed by the hydraulic contraction rod a2, the outer surfaces of the two groups of tubular workpieces 13 are clamped and closed by the arc-shaped lifting plate a3, and the top surface of the tubular workpiece 13 is overlapped by the downward counterweight plate a4 to avoid the inclination of the tubular workpiece 13 when it is closed and raised. At this time, the shielding plate 142 is extended by the hydraulic rod one 14, and the position of the tubular workpiece 13 is positioned by the two auxiliary positioning swing arms 149.

[0041] AsFigures 1 to 2 And Figure 7 As shown in the figure, the top outer side surface of the support gantry 12 is provided with a sliding groove 121 at the middle position, the inner walls of the two sides of the sliding groove 121 are provided with limiting sliding strips 122, the inner side wall of the sliding groove 121 and the outer side surface of the limiting sliding strip 122 are provided with an arc welding head 123, and the output end of the arc welding head 123 is overlapped at the abutting joint of the two groups of tubular workpieces 13.

[0042] When the two groups of tubular workpieces 13 are defined, the gap between the two groups of tubular workpieces 13 is abutted with the output end of the arc welding head 123, and the surface of the tubular workpiece 13 is welded by the arc welding head 123, and the tubular workpiece 13 is rotated by the motor 141, so that the arc welding head 123 uniformly slides and welds on the surface of the tubular workpiece 13.

[0043] As Figures 1 to 5 And Figures 8-9 As shown in the figure, the bottom inner side wall of the machining positioning table 11 is provided with a recessed groove 111, the inner side wall of the machining positioning table 11 is provided with an auxiliary hydraulic rod 112, the output end of the auxiliary hydraulic rod 112 is fixedly connected with an arc-shaped positioning pushing strip 113, the bottom surface of the arc-shaped positioning pushing strip 113 is movably overlapped with the inner side wall of the recessed groove 111, and the outer side surface of the arc-shaped positioning pushing strip 113 is movably overlapped with the outer side surface of the tubular workpiece 13. The outer side surface of the baffle 142 and the tubular workpiece 13 are provided with a ventilation cavity, the outer side surface of the two groups of gas return plates 1412 and the two groups of tubular workpieces 13 are provided with an air exhaust cavity, the outer side surface of the gas return plate 1412 and the four peripheral edge positions are fixedly installed with a fixed column c1, one end of the fixed column c1 is fixedly connected with an air exhaust sleeve c2, the outer side surface of the air exhaust sleeve c2 and the four peripheral edge positions of the fixed column c1 are fixedly installed with a small fan c3, the inner side wall of the air exhaust sleeve c2 and the four peripheral edge positions are provided with an air exhaust groove c4, the inner side wall of the air exhaust sleeve c2 is fixedly connected with a limiting strip c5, the outer side surface of the limiting strip c5 is provided with a filter sponge layer c6, and the outer side surface of the air exhaust sleeve c2 is movably sleeved with a closed cover c7.

[0044] According to different lengths of tubular workpieces 13, the arc-shaped positioning pushing strip 113 is extended and pushed by the auxiliary hydraulic rod 112, at this time the support column 143 is stretched by the hydraulic rod 14, and the position of the two groups of tubular workpieces 13 is limited by the auxiliary positioning swing arm 149, the suspended tubular workpiece 13 is overlapped on the surface of the output end of the arc welding head 123, at this time the support column 143 and the tubular workpiece 13 are rotated by the motor 141, so that the two groups of tubular workpieces 13 are uniformly welded while rotating;

[0045] When the electric arc welding joint 123 welds the tubular workpiece 13, some waste gas generated during welding enters the inside of the tubular workpiece 13 through the gap between the two tubular workpieces 13. The small fan c3 is matched with the inside of the air suction shell c2 to suck the inside of the air suction shell c2, and then the gas in the tubular workpiece 13 is circulated and extracted. At this time, the filter sponge layer c6 in the air suction shell c2 is used to filter the gas, and the fine metal particles in the waste gas are filtered out to avoid the harmful effect of the waste gas in the tubular workpiece 13.

[0046] Working principle: cooperate with hydraulic rod one 14 to extend the supporting column 143, and make the supporting column 143 on the inner side wall of the two groups of tubular workpieces 13. At this time, cooperate with hydraulic rod two 146 to push the sliding block 147, and make the auxiliary positioning swing arm 149 on one end of the sliding block 147 rotate around the supporting column 143 as the supporting point, and make the other end of the auxiliary positioning swing arm 149 extend outward, and then make the positioning anti-skid baffle 1411 on the outer side surface of the auxiliary positioning swing arm 149 adhere to the inner side wall of the tubular workpiece 13 for positioning. Because multiple auxiliary positioning swing arms 149 are expanded at the same time, the contact area and contact range between the auxiliary positioning swing arms 149 and the inner side wall of the tubular workpiece 13 can be greatly increased, so that the tubular workpiece 13 can be pushed and extruded on different surfaces during rotation, and the tubular workpiece 13 will not be bent slightly due to the change of extrusion and pushing force during rotation;

[0047] Multiple auxiliary positioning swing arms 149 are expanded at the same time, so that the auxiliary positioning swing arm 149 can be completely in the center position of the inside of the tubular workpiece 13, so that the tubular workpiece 13 can rotate around the supporting column 143 during subsequent movement and rotation, and the tubular workpiece 13 will not produce too large swing amplitude, and then the tubular workpiece 13 is pushed by the auxiliary positioning swing arm 149 to limit the position of the tubular workpiece 13;

[0048] The hydraulic rod 146 pushes the sliding block 147, and the limiting auxiliary strip 145 limits the position of the sliding block 147 when the sliding block 147 moves, so that the sliding block 147 moves horizontally. Since the position of one end of the auxiliary positioning swing arm 149 and the length of the auxiliary swing arm 148 are unchanged, the auxiliary positioning swing arm 149 is flipped up with the support column 143 as the support point, and the positioning anti-skid baffle 1411 on the outer surface of the auxiliary positioning swing arm 149 is attached to the inner side wall of the tubular workpiece 13. When the size of the tubular workpiece 13 is large, the elastic wire 1410 elastically pushes the positioning anti-skid baffle 1411, so that the positioning anti-skid baffle 1411 is preferentially lapped on the inner side wall of the tubular workpiece 13, and the position of the positioning anti-skid baffle 1411 is limited. With the continuous expansion of the auxiliary positioning swing arm 149, the elastic wire 1410 is compressed, so that the positioning anti-skid baffle 1411 is clamped into the inner side wall of the limiting groove 1413 for position limitation, thereby increasing the expansion range and area of the auxiliary positioning swing arm 149.

[0049] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A tubular workpiece welding positioning device, comprising a processing positioning table (11) and a supporting gantry (12) fixedly installed on the outer surface of the top of the processing positioning table (11), two sets of tubular workpieces (13) movably sleeved on the inner wall of the processing positioning table (11) and the bottom edge of the supporting gantry (12), and a hydraulic rod (14) fixedly installed inside the processing positioning table (11) and on the inner wall of the tubular workpieces (13), characterized in that: The output end of the hydraulic rod one (14) is provided with a pair of support columns (143), a pair of the support columns (143) are movably sleeved on the inner side walls of the two groups of tubular workpieces (13), the outer side surface of the support column (143) is provided with a recessed groove (144), the inner side wall of the recessed groove (144) is fixedly installed with a hydraulic rod two (146), the output end of the hydraulic rod two (146) is fixedly connected with a sliding block (147), the two side surfaces of the sliding block (147) are movably sleeved with auxiliary swing arms (148), one side of the recessed groove (144) is swingly connected with an auxiliary positioning swing arm (149), and the other end of the auxiliary swing arm (148) is movably sleeved on the outer side surface of the auxiliary positioning swing arm (149), and the outer side surface of the auxiliary positioning swing arm (149) is movably sleeved with a positioning anti-skid baffle (1411) movably sleeved on the inner side wall of the tubular workpiece (13). The two side walls of the recessed groove (144) are fixedly connected with limiting auxiliary strips (145), the outer side surface of the sliding block (147) is movably sleeved on the outer side surface of the limiting auxiliary strip (145), the outer side surface of the auxiliary positioning swing arm (149) is fixedly connected with an elastic wire (1410), and the other end of the elastic wire (1410) is fixedly connected to the bottom surface of the positioning anti-skid baffle (1411). The top outer side surface of the auxiliary positioning swing arm (149) and located on both side edges is provided with a limiting groove (1413), the inner side wall of the limiting groove (1413) is movably sleeved on the outer side surface of the two ends of the positioning anti-skid baffle (1411), and one end surface of the support column (143) is fixedly connected with a gas backflow plate (1412).

2. A tubular workpiece welding positioning device according to claim 1, wherein: The other end of the support column (143) is fixedly connected with a shielding plate (142), and the output end of the hydraulic rod one (14) is fixedly connected with a motor (141).

3. A tubular workpiece welding positioning apparatus as defined in claim 2 wherein: The outer side surface of the gas backflow plate (1412) and located on the four peripheral edge positions is fixedly installed with a fixed column (c1), one end of the fixed column (c1) is fixedly connected with an air suction shell (c2), and the outer side surface of the air suction shell (c2) and located on the four peripheral edge positions of the fixed column (c1) is fixedly installed with a small fan (c3).

4. A tubular workpiece welding positioning apparatus as defined in claim 3, wherein: The inner side wall of the air suction shell (c2) and located on the four peripheral edge positions is provided with an air suction groove (c4), and the inner side wall of the air suction shell (c2) is fixedly connected with a limiting strip (c5). The outer side surface of the limiting strip (c5) is provided with a filter sponge layer (c6), and the outer side surface of the air suction shell (c2) is movably sleeved with a closed cover (c7).

5. A tubular workpiece welding positioning apparatus as defined in claim 4, wherein: The arc-shaped lap joint groove (a1) is arranged on the inner wall surface of the two sides of the machining positioning table (11), the hydraulic retracting rod (a2) is fixedly installed on the inner side wall surface of the machining positioning table (11), the arc-shaped elevating plate (a3) is fixedly connected to the output end of the hydraulic retracting rod (a2), the outer side surface of the arc-shaped elevating plate (a3) is movably lapped on the inner side wall surface of the arc-shaped lap joint groove (a1), the bottom surface of the arc-shaped elevating plate (a3) is swingingly connected with the downward pressing counterweight plate (a4), and the inner side wall surfaces of the arc-shaped elevating plate (a3) and the downward pressing counterweight plate (a4) are movably lapped on the outer side surface of the tubular workpiece (13).

6. A tubular workpiece welding positioning apparatus as defined in claim 1, wherein: The chute (121) is arranged on the top outer side surface of the supporting gantry (12) and located at the middle position, the limiting sliding strip (122) is arranged on the inner wall surface of the two sides of the chute (121), the arc-shaped welding head (123) is arranged on the inner side wall surface of the chute (121) and the outer side surface of the limiting sliding strip (122), and the output end of the arc-shaped welding head (123) is lapped at the abutting joint of the two groups of tubular workpieces (13).

7. A tubular workpiece welding positioning apparatus as defined in claim 6, wherein: The inner recess groove (111) is arranged on the bottom inner side wall surface of the machining positioning table (11), the auxiliary hydraulic rod (112) is arranged on the inner side wall surface of the machining positioning table (11), the arc-shaped positioning pushing strip (113) is fixedly connected to the output end of the auxiliary hydraulic rod (112), the bottom surface of the arc-shaped positioning pushing strip (113) is movably lapped on the inner side wall surface of the inner recess groove (111), and the outer side surface of the arc-shaped positioning pushing strip (113) is movably lapped on the outer side surface of the tubular workpiece (13).

8. A tubular workpiece welding positioning apparatus as defined in claim 2 wherein: The ventilation cavity is arranged between the outer side surface of the shielding plate (142) and the tubular workpiece (13), and the air extraction cavity is arranged between the outer side surfaces of the two groups of gas return plates (1412) and the two groups of tubular workpieces (13).

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