Tubular workpiece welding positioning device

Abstract

The invention relates to the field of tubular part positioning, in particular to a tubular workpiece welding positioning device which comprises a machining positioning table, a supporting portal frame fixedly installed on the outer side surface of the top of the machining positioning table, and two sets of tubular workpieces movably connected to the inner side wall face of the machining positioning table and the edge position of the bottom of the supporting portal frame in a sleeving mode. The first hydraulic rod is fixedly installed in the machining positioning table and on the inner side wall face of the tubular workpiece, and a pair of supporting columns is arranged at the output end of the first hydraulic rod. Supporting columns extend in cooperation with first hydraulic rods, the supporting columns are located on the inner side wall faces of the two sets of tubular workpieces, at the moment, sliding blocks are pushed in cooperation with second hydraulic rods, auxiliary positioning swing arms at one ends of the sliding blocks rotate with the supporting columns as supporting points, and the other ends of the auxiliary positioning swing arms extend and expand outwards; and then a positioning anti-skid baffle on the outer side surface of the auxiliary positioning swing arm is attached to the inner side wall face of the tubular workpiece for positioning.

Description

Technical Field

[0001] The invention belongs to the technical field of tubular piece positioning, in particular to a tubular workpiece welding positioning device. Background Art

[0002] Tubular workpieces are widely used in industrial production, such as pipelines, thermal equipment, mechanical industry, petroleum geological drilling, containers, chemical industry and special purposes. 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 the publication number CN114633069A discloses a positioning device and positioning method for tubular workpiece welding, which belongs to the field of intelligent manufacturing technology. It includes a base and a plurality of rollers arranged at the bottom of the base, and also includes a lifting mechanism, a rotating mechanism, a displacement mechanism and a positioning mechanism, wherein 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 for fixing 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 of the present invention automatically and flexibly clamps the tubular workpiece, and can be compatible with tubular workpieces of multiple diameters by adjusting the distance between the two first support seats. At the same time, components such as the screw, worm gear and worm gear can be self-locking to achieve stable positioning of the tubular workpiece; at the same time, multiple degrees of freedom are set so that the tubular workpiece can be applied to different positions, which is convenient for the completion of welding work.

[0004] In the current existing technology, the butted steel pipes not only require good sealing, but also the paired pipes must reduce shaking as much as possible and have good stability. However, due to the large diameter of the pressure steel pipe, there are problems such as large misalignment and uneven docking when the two pressure steel pipes are butted. The existing method requires manual use of a jack to adjust the misalignment of the pipe before welding the joints of the pressure pipe, and a small amount of movement is required when docking another section of the pressure pipe, which is also a manual operation and time-consuming and labor-intensive.

[0005] To this end, the present invention provides a tubular workpiece welding positioning device. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A welding positioning device for tubular workpieces according to the present invention includes a processing positioning table and a supporting gantry fixedly installed on the outer surface of the top of the processing positioning table. Two sets of tubular workpieces are movably sleeved on the inner wall surface of the processing positioning table and the bottom edge position of the supporting gantry. A first hydraulic rod is fixedly installed inside the processing positioning table and on the inner wall surface of the tubular workpieces. A pair of supporting columns are provided at the output end of the first hydraulic rod. The pair of supporting columns are respectively movably sleeved on the inner wall surfaces of the two sets of tubular workpieces. An indented empty groove is provided on the outer surface of the supporting column. A second hydraulic rod is fixedly installed on the inner wall surface of the indented empty groove. A slider is fixedly connected to the output end of the second hydraulic rod. Auxiliary swing arms are movably sleeved on both side surfaces of the slider. An auxiliary positioning swing arm is swingably connected to one inner wall surface of the indented empty groove. And the other end of the auxiliary swing arm is movably sleeved on the outer surface of the auxiliary positioning swing arm. A positioning anti-slip baffle is movably sleeved on the outer surface of the auxiliary positioning swing arm and is in contact with the inner wall surface of the tubular workpiece.

[0008] Preferably, limiting auxiliary strips are fixedly connected to the inner wall surfaces on both sides of the indented empty groove. The outer surface of the slider is movably in contact with the outer surface of the limiting auxiliary strips. An elastic wire is fixedly connected to the outer surface of the auxiliary positioning swing arm. The other end of the elastic wire is fixedly connected to the bottom surface of the positioning anti-slip baffle.

[0009] Preferably, limiting grooves are provided on the outer surface of the top of the auxiliary positioning swing arm and at the positions of the two side edges. The inner wall surfaces of the limiting grooves are movably in contact with the outer surfaces of both ends of the positioning anti-slip baffle. A gas return plate is fixedly connected to one end surface of the supporting column. The position of the gas return plate is at the joint surface of the two sets of tubular workpieces.

[0010] Preferably, a shielding plate is fixedly connected to the other end of the supporting column. A motor is fixedly connected to the output end of the first hydraulic rod. The output end of the motor is fixedly connected to the outer surface of the shielding plate.

[0011] Preferably, fixing columns are fixedly installed on the outer surface of the gas return plate and at the positions of the four peripheral edges. One end of the fixing column is fixedly connected to an air extraction housing. Small fans are fixedly installed on the outer surface of the air extraction housing and at the positions of the four peripheral edges of the fixing column.

[0012] Preferably, air extraction grooves are provided on the inner wall surface of the air extraction housing and at the positions of the four peripheral edges. Limiting strips are fixedly connected to the inner wall surface of the air extraction housing. A filter sponge layer is provided on the outer surface of the limiting strip. A closed cover is movably sleeved on the outer surface of the air extraction housing.

[0013] Preferably, arc-shaped lapping grooves are formed on the inner wall surfaces on both sides of the processing positioning table. A hydraulic retractable rod is fixedly installed on the inner wall surface of the processing positioning table. An arc-shaped heightening plate is fixedly connected to the output end of the hydraulic retractable rod. The outer surface of the arc-shaped heightening plate is movably lapped on the inner wall surface of the arc-shaped lapping groove. A downward pressure counterweight plate is swingably connected to the top surface of the arc-shaped heightening plate. The inner wall surfaces of the arc-shaped heightening plate and the downward pressure counterweight plate are movably lapped on the outer surface of the tubular workpiece.

[0014] Preferably, a chute is formed on the outer surface at the middle position on the top of the support gantry. Limit sliding strips are provided on the inner wall surfaces on both sides of the chute. Arc welding heads are provided on the inner wall surface of the chute and the outer surface of the limit sliding strips. The output end of the arc welding head is lapped at the fitting and butting position of the two groups of tubular workpieces.

[0015] Preferably, an inlaid groove is formed on the inner wall surface at the bottom of the processing positioning table. An auxiliary hydraulic rod is provided on the inner wall surface of the processing positioning table. An arc-shaped positioning push bar is fixedly connected to the output end of the auxiliary hydraulic rod. The bottom surface of the arc-shaped positioning push bar is movably lapped on the inner wall surface of the inlaid groove, and the outer surface of the arc-shaped positioning push bar is movably lapped on the outer surface of the tubular workpiece.

[0016] Preferably, a ventilation cavity is provided between the outer surface of the shielding plate and the tubular workpiece. An air extraction cavity is provided 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 invention are as follows: 1. For a tubular workpiece welding positioning device of the present invention, a pair of support columns are extended in cooperation with the hydraulic rod one, and the support columns are located on the inner wall surfaces of the two groups of tubular workpieces. At this time, the slider is pushed in cooperation with the hydraulic rod two, and the auxiliary positioning swing arm at one end of the slider rotates with the support column as the support point, and the other end of the auxiliary positioning swing arm extends and expands outwards, so that the positioning anti-slip baffle on the outer surface of the auxiliary positioning swing arm is attached to the inner wall surface of the tubular workpiece for positioning. Since multiple auxiliary positioning swing arms expand simultaneously, the contact area and contact range with the inner wall surface of the tubular workpiece can be greatly increased. When the tubular workpiece rotates, different surfaces of the tubular workpiece can be subjected to the same extrusion and pushing force, and the tubular workpiece will not be slightly bent due to the change of the extrusion driving force when rotating. 2. A tubular workpiece welding positioning device described in the present invention cooperates with two pairs of hydraulic rods to push the slider. When the slider is moving, the position of the slider is limited by the limit auxiliary strip, so that the slider moves horizontally. Since the position of one end of the auxiliary positioning swing arm and the length of the auxiliary swing arm remain unchanged, the auxiliary positioning swing arm is flipped and tilted with the support column as the support point, and the positioning anti-skid baffle on the outer surface of the auxiliary positioning swing arm is attached to the inner wall surface of the tubular workpiece. When the size of the tubular workpiece is large, the positioning anti-skid baffle is elastically pushed by the elastic wire, so that the positioning anti-skid baffle is preferentially overlapped on the inner wall surface of the tubular workpiece, and the position of the positioning anti-skid baffle is limited. As the auxiliary positioning swing arm continues to expand and the elastic wire is compressed, the positioning anti-skid baffle is clamped into the inner wall surface of the limiting groove to limit the position, thereby increasing the expansion range and area of ​​the auxiliary positioning swing arm. 3. In the tubular workpiece welding positioning device described in the present invention, multiple auxiliary positioning swing arms are expanded at the same time, so that the auxiliary positioning swing arms can be completely located at the center position of the inner side of the tubular workpiece, so that when the tubular workpiece is subsequently moved and rotated, the tubular workpiece can rotate with the support column as the center point, and the tubular workpiece will not produce an excessive swing amplitude, thereby achieving the effect of limiting the position of the tubular workpiece under the push of the auxiliary positioning swing arms. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 is a stereogram of the present invention; Figure 2 It is a cutaway stereogram of the processing positioning table in the present invention; Figure 3 It is a cross-sectional stereoscopic diagram of the arc-shaped positioning push strip in the present invention; Figure 4 It is an expanded sectional stereoscopic view of the auxiliary positioning swing arm in the present invention; Figure 5 It is a sectional stereoscopic view of the auxiliary positioning swing arm in the present invention when closed; Figure 6 is a sectional stereoscopic view of the auxiliary positioning swing arm in the present invention; Figure 7 It is a sectional stereoscopic diagram of the arc-shaped elevation plate in the present invention; Figure 8 is a sectional stereoscopic view of the gas return plate of the present invention; Figure 9 It is a perspective view of a gas reflux plate in the present invention when it is expanded and cut away.

[0020] In the figure: 11, processing positioning table; a1, arc-shaped overlapping groove; a2, hydraulic contraction rod; a3, arc-shaped elevation plate; a4, downward pressure counterweight plate; 111, sunken groove; 112, auxiliary hydraulic rod; 113, arc-shaped positioning push bar; 12, support gantry; 121, chute; 122, limit slide bar; 123, arc welding head; 13, tubular workpiece; 14, hydraulic rod 1; 141, motor; 142, baffle; 143, support column; 144, sunken empty groove; 145, limit auxiliary bar; 146, hydraulic rod 2; 147, slider; 148, auxiliary swing arm; 149, auxiliary positioning swing arm; 1410, elastic wire; 1411, positioning anti-slip baffle; 1412, gas return plate; 1413, limit groove; c1, fixed column; c2, air extraction housing; c3, small fan; c4, air extraction groove; c5, limit bar; c6, filter sponge layer; c7, closed cover. Detailed implementation manner

[0021] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0022] As Figures 1 to 7 shown, a welding positioning device for a tubular workpiece according to an embodiment of the present invention includes a processing positioning table 11 and a support gantry 12 fixedly installed on the outer surface of the top of the processing positioning table 11, two groups of tubular workpieces 13 movably sleeved on the inner wall surface of the processing positioning table 11 and the bottom edge position of the support gantry 12, a hydraulic rod 1 14 fixedly installed inside the processing positioning table 11 and on the inner wall surface of the tubular workpiece 13, a pair of support columns 143 are arranged at the output end of the hydraulic rod 1 14, the pair of support columns 143 are respectively movably sleeved on the outer surface of the support columns on the inner wall surface of the two groups of tubular workpieces 13, a sunken empty groove 144 is provided on the outer surface of the support column 143, a hydraulic rod 2 146 is fixedly installed on the inner wall surface of the sunken empty groove 144, a slider 147 is fixedly connected to the output end of the hydraulic rod 2 146, auxiliary swing arms 148 are movably sleeved on both side surfaces of the slider 147, an auxiliary positioning swing arm 149 is swingably connected to one inner wall surface of the sunken empty groove 144, and the other end of the auxiliary swing arm 148 is movably sleeved on the outer surface of the auxiliary positioning swing arm 149, and a positioning anti-slip baffle 1411 movably lapped on the inner wall surface of the tubular workpiece 13 is movably sleeved on the outer surface of the auxiliary positioning swing arm 149.

[0023] The hydraulic rod 14 is used to extend the support column 143, and the support column 143 is positioned on the inner side wall surfaces of the two sets of tubular workpieces 13. At this time, the hydraulic rod 146 is used to push the slider 147, and the auxiliary positioning swing arm 149 at one end of the slider 147 rotates with the support column 143 as the support point, and the other end of the auxiliary positioning swing arm 149 extends and expands outwards. Then, the positioning anti-slip baffle 1411 on the outer surface of the auxiliary positioning swing arm 149 is attached to the inner side wall surface of the tubular workpiece 13 for positioning. Since multiple auxiliary positioning swing arms 149 expand simultaneously, the contact area and contact range with the inner side wall surface of the tubular workpiece 13 can be greatly increased. When the tubular workpiece 13 rotates, different surfaces of the tubular workpiece 13 can receive the same extrusion and pushing force, and the tubular workpiece 13 will not show a small bending effect due to the change of the extrusion driving force during rotation; Multiple auxiliary positioning swing arms 149 expand simultaneously, so that the auxiliary positioning swing arms 149 can be completely located at the central position inside the tubular workpiece 13. As a result, when the tubular workpiece 13 moves and rotates subsequently, the tubular workpiece 13 can rotate around the support column 143 as the center point, and the tubular workpiece 13 will not generate an excessive swing amplitude. Furthermore, the tubular workpiece 13 is subjected to a position-limiting treatment under the push of the auxiliary positioning swing arm 149.

[0024] As Figure 1 、 Figures 3 to 6 and Figure 8 shown, limiting auxiliary strips 145 are fixedly connected to the inner wall surfaces on both sides of the recessed hollow groove 144. The outer surface of the slider 147 is movably lapped on the outer surface of the limiting auxiliary strip 145. An elastic wire 1410 is fixedly connected to the outer surface of the auxiliary positioning swing arm 149, and the other end of the elastic wire 1410 is fixedly connected to the bottom surface of the positioning anti-slip baffle 1411. Limiting grooves 1413 are formed on the outer surface of the top of the auxiliary positioning swing arm 149 and are located at both edge positions. The inner wall surface of the limiting groove 1413 is movably lapped on the outer surfaces of both ends of the positioning anti-slip baffle 1411. A gas return plate 1412 is fixedly connected to one end surface of the support column 143, and the position of the gas return plate 1412 is set at the joint surface of the two sets of tubular workpieces 13. A shielding plate 142 is fixedly connected to the other end of the support column 143. A motor 141 is fixedly connected to the output end of the hydraulic rod 14, and the output end of the motor 141 is fixedly connected to the outer surface of the shielding plate 142.

[0025] The slider 147 is pushed by the hydraulic rod two 146. When the slider 147 moves, the position of the slider 147 is limited by the limiting auxiliary strip 145, enabling the slider 147 to move horizontally. Since one end position of the auxiliary positioning swing arm 149 and the length of the auxiliary swing arm 148 remain unchanged, the auxiliary positioning swing arm 149 is flipped and lifted with the support column 143 as the support point, and the positioning anti-slip baffle 1411 on the outer surface of the auxiliary positioning swing arm 149 is attached to the inner wall surface of the tubular workpiece 13. When the size of the tubular workpiece 13 is large, the elastic wire 1410 is used to elastically push the positioning anti-slip baffle 1411, enabling the positioning anti-slip baffle 1411 to be preferentially lapped on the inner wall surface of the tubular workpiece 13 and limiting the position of the positioning anti-slip baffle 1411. As the auxiliary positioning swing arm 149 continuously expands and compresses the elastic wire 1410, the positioning anti-slip baffle 1411 is clamped into the inner wall surface of the limiting groove 1413 for position limitation, thereby increasing the expansion range and area of the auxiliary positioning swing arm 149; When the size of the tubular workpiece 13 is small, the positioning anti-slip baffle 1411 on the outer surface of the auxiliary positioning swing arm 149 will be preferentially attached to the inner wall surface of the tubular workpiece 13. As the auxiliary positioning swing arm 149 continuously expands, the elastic wire 1410 is compressed, and through the reverse driving force of the elastic wire 1410, the friction and extrusion force between the positioning anti-slip baffle 1411 and the inner wall surface of the tubular workpiece 13 are increased.

[0026] As Figures 1 to 3 and Figure 7 As shown, arc-shaped lapping grooves a1 are formed on the inner wall surfaces on both sides of the processing positioning table 11. A hydraulic contraction rod a2 is fixedly installed on the inner wall surface of the processing positioning table 11. An arc-shaped heightening plate a3 is fixedly connected to the output end of the hydraulic contraction rod a2. The outer surface of the arc-shaped heightening plate a3 is movably lapped on the inner wall surface of the arc-shaped lapping groove a1. A downward pressure counterweight plate a4 is swingably connected to the top surface of the arc-shaped heightening plate a3. The inner wall surfaces of the arc-shaped heightening plate a3 and the downward pressure counterweight plate a4 are movably lapped on the outer surface of the tubular workpiece 13.

[0027] When the two groups of tubular workpieces 13 move to the middle position of the processing positioning table 11, the hydraulic contraction rod a2 is used to extend and push the arc-shaped heightening plate a3. The arc-shaped heightening plate a3 is used to clamp and close the outer surfaces of the two groups of tubular workpieces 13, and the downward pressure counterweight plate a4 is lapped on the top surface of the tubular workpiece 13 to prevent the tubular workpiece 13 from tilting in position when being closed and lifted. At this time, the hydraulic rod one 14 is used to extend the shielding plate 142, and the two groups of auxiliary positioning swing arms 149 are used to position the tubular workpiece 13.

[0028] As Figures 1 to 2 andFigure 7 As shown, a chute 121 is provided on the outer surface of the top of the supporting gantry 12 and is located in the middle position. Limiting sliding strips 122 are provided on the inner wall surfaces on both sides of the chute 121. Arc welding heads 123 are provided on the inner wall surface of the chute 121 and the outer surface of the limiting sliding strips 122. The output end of the arc welding head 123 is lapped on the fitting butt joint of the two sets of tubular workpieces 13.

[0029] After the two sets of tubular workpieces 13 are defined and the gap between the two sets of tubular workpieces 13 is fitted with the output end of the arc welding head 123, the surface of the tubular workpiece 13 is welded by the arc welding head 123. At the same time, the motor 141 is used to rotate the tubular workpiece 13, so that the arc welding head 123 slides and welds uniformly on the surface of the tubular workpiece 13.

[0030] As Figures 1 to 5 and Figures 8 - 9 shown, an inward recessed groove 111 is provided on the inner wall surface of the bottom of the processing positioning table 11. An auxiliary hydraulic rod 112 is provided on the inner wall surface of the processing positioning table 11. An arc-shaped positioning push bar 113 is fixedly connected to the output end of the auxiliary hydraulic rod 112. The bottom surface of the arc-shaped positioning push bar 113 is movably lapped on the inner wall surface of the inward recessed groove 111, and the outer surface of the arc-shaped positioning push bar 113 is movably lapped on the outer surface of the tubular workpiece 13. A ventilation cavity is provided between the outer surface of the shielding plate 142 and the tubular workpiece 13. An air extraction cavity is provided between the outer surfaces of the two sets of gas return plates 1412 and the two sets of tubular workpieces 13. Fixed columns c1 are fixedly installed on the outer surface of the gas return plate 1412 and at the four peripheral positions. One end of the fixed column c1 is fixedly connected to an air extraction housing c2. A small fan c3 is fixedly installed on the outer surface of the air extraction housing c2 and at the four peripheral positions of the fixed column c1. Air extraction grooves c4 are provided on the inner wall surface of the air extraction housing c2 and at the four peripheral positions. A limiting strip c5 is fixedly connected to the inner wall surface of the air extraction housing c2. A filter sponge layer c6 is provided on the outer surface of the limiting strip c5. A closed cover c7 is movably sleeved on the outer surface of the air extraction housing c2.

[0031] According to different lengths of the tubular workpiece 13, the auxiliary hydraulic rod 112 is used to extend and push the arc-shaped positioning push bar 113. At this time, the hydraulic rod 14 is used to stretch the support column 143, and the auxiliary positioning swing arm 149 is used to limit the positions of the two sets of tubular workpieces 13. The suspended tubular workpiece 13 will be lapped on the output end surface of the arc welding head 123. At this time, the motor 141 is used to rotate the support column 143 and the tubular workpiece 13, so that the two sets of tubular workpieces 13 are uniformly welded while rotating; While the arc welding joint 123 is welding the tubular workpiece 13, some of the waste gas generated during welding will enter the interior of the tubular workpiece 13 through the gap between the two tubular workpieces 13. The small blower c3 is used to extract the air inside the air extraction housing c2, thereby circulating and extracting the gas inside the tubular workpiece 13. At this time, the gas is filtered through the filter sponge layer c6 inside the air extraction housing c2, and the fine metal particles inside the waste gas are filtered out, avoiding the harm caused by the waste gas inside the tubular workpiece 13 during later storage.

[0032] Working principle: The hydraulic rod one 14 is used to extend the support column 143, and the support column 143 is located on the inner side wall surfaces of the two groups of tubular workpieces 13. At this time, the hydraulic rod two 146 is used to push the slider 147, and the auxiliary positioning swing arm 149 at one end of the slider 147 rotates with the support column 143 as the support point, and the other end of the auxiliary positioning swing arm 149 extends and expands towards the outside. Then, the positioning anti-slip baffle 1411 on the outer surface of the auxiliary positioning swing arm 149 is attached to the inner side wall surface of the tubular workpiece 13 for positioning. Since multiple auxiliary positioning swing arms 149 expand simultaneously, the contact area and contact range with the inner side wall surface of the tubular workpiece 13 can be greatly increased. When the tubular workpiece 13 rotates, different surfaces of the tubular workpiece 13 can receive the same extrusion and push, and the tubular workpiece 13 will not be slightly bent due to the change of the extrusion driving force during rotation. Multiple auxiliary positioning swing arms 149 expand simultaneously, so that the auxiliary positioning swing arm 149 can be completely located at the central position inside the tubular workpiece 13. As a result, when the tubular workpiece 13 moves and rotates later, the tubular workpiece 13 can rotate around the support column 143 as the center point, and the tubular workpiece 13 will not have too large a swing amplitude. Then, the tubular workpiece 13 is limited in position under the push of the auxiliary positioning swing arm 149. The slider 147 is pushed by the hydraulic rod two 146. When the slider 147 moves, the position of the slider 147 is limited by the limit auxiliary strip 145, so that the slider 147 moves horizontally. Since one end position of the auxiliary positioning swing arm 149 and the length of the auxiliary swing arm 148 remain unchanged, the auxiliary positioning swing arm 149 takes the support column 143 as the support point and turns up. The positioning anti-slip baffle 1411 on the outer surface of the auxiliary positioning swing arm 149 is attached to the inner wall surface of the tubular workpiece 13. When the size of the tubular workpiece 13 is large, the positioning anti-slip baffle 1411 is elastically pushed by the elastic wire 1410, so that the positioning anti-slip baffle 1411 is preferentially lapped on the inner wall surface of the tubular workpiece 13, and the position of the positioning anti-slip baffle 1411 is limited. As the auxiliary positioning swing arm 149 continuously expands and compresses the elastic wire 1410, the positioning anti-slip baffle 1411 is clamped into the inner wall surface of the limit groove 1413 for position limitation, thereby increasing the expansion range and area of the auxiliary positioning swing arm 149.

[0033] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding positioning device for tubular workpieces, 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 groups of tubular workpieces (13) movably sleeved on the inner wall surface of the processing positioning table (11) and the bottom edge position of the supporting gantry (12), and a first hydraulic rod (14) fixedly installed inside the processing positioning table (11) and on the inner wall surface of the tubular workpiece (13), characterized in that: A pair of support columns (143) are provided on the output end of the hydraulic rod 1 (14). The pair of support columns (143) are respectively movably sleeved on the inner side wall surfaces of two groups of tubular workpieces (13). An indented empty groove (144) is formed on the outer surface of the support column (143). A hydraulic rod 2 (146) is fixedly installed on the inner side wall surface of the indented empty groove (144). A slider (147) is fixedly connected to the output end of the hydraulic rod 2 (146). An auxiliary swing arm (148) is movably sleeved on the two side surfaces of the slider (147). An auxiliary positioning swing arm (149) is swingably connected to one side inner wall surface of the indented empty groove (144). And 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) that is movably lapped on the inner side wall surface of the tubular workpiece (13) is movably sleeved on the outer surface of the auxiliary positioning swing arm (149).

2. The welding positioning device for a tubular workpiece according to claim 1, wherein: Limit auxiliary strips (145) are fixedly connected to the two side inner wall surfaces of the indented empty groove (144). The outer surface of the slider (147) is movably lapped on the outer surface of the limit auxiliary strip (145). An elastic wire (1410) is fixedly connected to the outer surface of the auxiliary positioning swing arm (149). The other end of the elastic wire (1410) is fixedly connected to the bottom surface of the positioning anti-slip baffle (1411).

3. A welding positioning device for tubular workpieces according to claim 2, characterized in that: Limit grooves (1413) are formed on the outer surface of the top of the auxiliary positioning swing arm (149) and are located at the two side edge positions. The inner side wall surfaces of the limit grooves (1413) are movably lapped on the outer side surfaces of the two ends of the positioning anti-slip baffle (1411). A gas return plate (1412) is fixedly connected to one end surface of the support column (143). The position of the gas return plate (1412) is at the joint of the surfaces of the two groups of tubular workpieces (13).

4. A welding positioning device for tubular workpieces according to claim 3, characterized in that: A shielding plate (142) is fixedly connected to the other end of the support column (143). A motor (141) is fixedly connected to the output end of the hydraulic rod 1 (14). The output end of the motor (141) is fixedly connected to the outer surface of the shielding plate (142).

5. The tubular workpiece welding positioning device according to claim 4, characterized in that: Fixed columns (c1) are fixedly installed on the outer surface of the gas return plate (1412) and are located at the four peripheral edge positions. An air extraction housing (c2) is fixedly connected to one end of the fixed column (c1). Small fans (c3) are fixedly installed on the outer surface of the air extraction housing (c2) and are located at the four peripheral edge positions of the fixed column (c1).

6. The tubular workpiece welding positioning device according to claim 5, wherein: Air extraction grooves (c4) are formed on the inner side wall surface of the air extraction housing (c2) and are located at the four peripheral edge positions. Limit strips (c5) are fixedly connected to the inner side wall surface of the air extraction housing (c2). A filter sponge layer (c6) is arranged on the outer surface of the limit strip (c5). A closed cover (c7) is movably sleeved on the outer surface of the air extraction housing (c2).

7. A welding positioning device for tubular workpieces according to claim 6, characterized in that: On both inner wall surfaces of the processing positioning table (11), arc-shaped lapping grooves (a1) are provided. On the inner wall surface of the processing positioning table (11), a hydraulic retractable rod (a2) is fixedly installed. The output end of the hydraulic retractable rod (a2) is fixedly connected with an arc-shaped elevation plate (a3). The outer surface of the arc-shaped elevation plate (a3) is movably lapped on the inner wall surface of the arc-shaped lapping groove (a1). On the top surface of the arc-shaped elevation plate (a3), a downward pressure counterweight plate (a4) is swingably connected. The inner wall surfaces of the arc-shaped elevation plate (a3) and the downward pressure counterweight plate (a4) are movably lapped on the outer surface of the tubular workpiece (13).

8. A welding positioning device for tubular workpieces according to claim 7, characterized in that: On the outer surface of the top of the support gantry (12) and at the middle position, a chute (121) is provided. On both inner wall surfaces of the chute (121), limit sliding strips (122) are provided. On the inner wall surface of the chute (121) and the outer surface of the limit sliding strips (122), an arc welding head (123) is provided. The output end of the arc welding head (123) is lapped at the butting joint of two groups of tubular workpieces (13).

9. The welding positioning device for a tubular workpiece according to claim 8, characterized in that: On the bottom inner wall surface of the processing positioning table (11), an inlaid groove (111) is provided. On the inner wall surface of the processing positioning table (11), an auxiliary hydraulic rod (112) is provided. The output end of the auxiliary hydraulic rod (112) is fixedly connected with an arc-shaped positioning push bar (113). The bottom surface of the arc-shaped positioning push bar (113) is movably lapped on the inner wall surface of the inlaid groove (111), and the outer surface of the arc-shaped positioning push bar (113) is movably lapped on the outer surface of the tubular workpiece (13).

10. A welding positioning device for tubular workpieces according to claim 9, characterized in that: A ventilation cavity is provided between the outer surface of the shielding plate (142) and the tubular workpiece (13). An air extraction cavity is provided between the outer surfaces of the two groups of gas return plates (1412) and the two groups of tubular workpieces (13).

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