A multi-specification parts positioning device for welding machine tools

Abstract

The present invention relates to the field of welding processing technology, specifically to a multi-specification parts positioning device for welding machine tools, including a base, a rotating seat rotatably mounted on the base, and a support table fixedly mounted on the rotating seat, and a flange positioning device for positioning flanges of different specifications for forming a bent pipe workpiece is fixed on the support table. The device can adaptively position flanges of different specifications by using the flange positioning device, and adaptively position and clamp pipe bodies of different specifications by using a centering clamping device, an extrusion device, a rotating mounting frame and a station conversion device, and can also automatically change the welding direction of the pipe body, so that there is no need to manually change the clamp of the pipe body, so that there is no need to change the fixture when processing bent pipe workpieces of different specifications, which solves the problem that the existing positioning device cannot adaptively position and clamp bent pipe parts of different specifications, and can effectively reduce the operation steps to improve welding accuracy and welding efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of welding processing, in particular to a multi-specification parts positioning device for a welding machine tool. Background Art

[0002] Pipes are common parts mainly used to transport fluids or as structural supports. When two pipes at different angles need to be connected, elbows are needed for transition. For elbows that do not need to be disassembled again, they can generally be installed by direct welding, while for elbows that need to be disassembled and assembled repeatedly, special elbow parts are needed for connection.

[0003] In order to facilitate the rapid installation of the bent pipe parts, flanges need to be set at the joints at both ends of the bent pipe parts. And many of these flanges are welded to the ends of the bent pipe parts by machine tools. When the traditional welding machine tool welds the flanges at the ends of the bent pipes, it mainly adopts a simple clamp with manual hand-held fixation, which makes the processing accuracy unable to be guaranteed. If a precise special clamp is used, the existing clamps of this type are generally unable to adapt to the different sizes and specifications of the bent pipe parts. Each specification of the bent pipe parts requires a corresponding set of special clamps, which makes it necessary to replace the clamps according to the different specifications of the parts during production and processing, which seriously delays the production efficiency. For example, the patent with application number CN218800144U and patent name "Pipeline Flange Welding Positioning Device" discloses this type of positioning and clamping structure for welding flanges at the ends of pipes. This type of positioning and clamping structure is not only unable to adapt to different specifications of bent pipe parts, but also needs to change the clamps of the bent pipe parts when the flanges are welded at both ends of the bent pipe parts, which easily introduces the clamping error and causes the decrease of welding accuracy.

[0004] Therefore, we need a multi-specification parts positioning device for welding machine tools to solve the problem that the existing positioning device cannot adaptively position and clamp bent pipe parts of different specifications, which can effectively reduce the operation steps and improve welding accuracy and welding efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing positioning device cannot adaptively position and clamp bent pipe parts of different specifications. The present application provides a multi-specification part positioning device for a welding machine tool, which can effectively reduce the operating steps and improve welding accuracy and welding efficiency.

[0006] To achieve the above object, the present invention provides the following technical solution: a multi-specification parts positioning device for a welding machine tool, comprising:

[0007] A base, on which a rotating seat is rotatably mounted, and on which a supporting platform is fixedly mounted, and on which a flange positioning device for positioning flanges of different specifications for forming a bent pipe workpiece is fixed;

[0008] A rotating mounting frame, the rotating mounting frame comprises a main rotating shaft rotatably mounted with the top plate, a connecting frame is fixedly mounted on the bottom of the main rotating shaft, and a lifting and lowering adjustment push rod for driving the top plate to rise and fall is fixed on the base;

[0009] A workstation conversion device, wherein a workstation conversion device is disposed at each of the left and right ends of the rotating mounting frame, and the workstation conversion device comprises a fixed frame, the middle portion of the fixed frame is rotatably mounted with the connecting frame through an angle adjustment motor, and a pair of extrusion devices are symmetrically arranged on the fixed frame, a first screw motor for driving the extrusion device to move along the fixed frame through a screw is installed on the fixed frame, and a centering clamping device for clamping pipe bodies of different specifications constituting the pipe bending workpiece is installed at the extrusion output end of the extrusion device;

[0010] The controller is fixedly mounted on the base, and the controller is electrically connected to the lifting adjustment push rod, the angle adjustment motor and the first screw motor respectively.

[0011] Preferably, a bottom rotating motor is fixedly mounted on the base, and a second gear ring is fixedly mounted on the rotating seat, the output end of the bottom rotating motor drives a second driving wheel which is meshed with the second gear ring and is used to drive the rotating seat to rotate, and the bottom rotating motor is electrically connected to the controller.

[0012] Preferably, the flange positioning device includes a sliding rod slidably mounted with the support platform, a top support frame is fixedly mounted on the top of the sliding rod, and the top of the top support frame is provided with centering grooves with different diameters for correspondingly accommodating flanges of different sizes at different heights, and each of the centering grooves is provided with at least one pair of hole centering rods for inserting into the holes of the flange for positioning, and the top support frame is provided with a lifting push rod for lifting the hole centering rod corresponding to each hole centering rod, and the lifting push rod is electrically connected to the controller.

[0013] Preferably, a second screw motor is fixedly mounted on the support platform, and the end of the second screw motor is driven by a screw to have a flange clamping arm that slides along the support platform, the flange clamping arm is used to clamp the side and top surfaces of the flange plate, and a clamping fitting groove corresponding to the flange clamping arm is provided on the top support frame, and the second screw motor is electrically connected to the controller.

[0014] Preferably, a pressure sensor for detecting whether the flange is installed is provided at the edge of each centering groove, and the pressure sensor is electrically connected to the controller.

[0015] Preferably, the flange positioning device includes a height adjustment push rod fixedly mounted on the rotating seat, and the output end of the height adjustment push rod is used to drive the sliding rod to rise and fall, the cross-section of the sliding rod is a regular hexagon, and the height adjustment push rod is electrically connected to the controller.

[0016] Preferably, a top rotating motor is fixedly mounted on the top plate, and a first gear ring is fixedly mounted on the main rotating shaft, the output end of the top rotating motor drives a first driving wheel which is meshed with the first gear ring and is used to drive the main rotating shaft to rotate, and the top rotating motor is electrically connected to the controller.

[0017] Preferably, the extrusion device includes a moving seat, and the output end of the first screw motor drives the moving seat to move along the fixed frame through the screw, an extrusion push rod is fixedly mounted on the moving seat, and the output end of the extrusion push rod drives a direction fine-tuning motor, the output end of the direction fine-tuning motor is used to drive the mounting plate to rotate, and the mounting plate is used to install the centering clamping device, and the extrusion push rod and the direction fine-tuning motor are both electrically connected to the controller.

[0018] Preferably, the centering clamping device includes a connecting seat fixedly mounted on the mounting plate, and a first sliding guide rod is slidably mounted in the connecting seat, a first V-shaped block for clamping the tube body is fixedly mounted on the first sliding guide rod, and the first V-shaped block and the connecting seat are connected by a first return spring.

[0019] Preferably, a pre-clamping device for pre-clamping the tube body is fixedly installed on the mounting plate, and the pre-clamping device includes a second sliding guide rod slidably installed with the mounting plate, a second V-shaped block for clamping the tube body is fixedly installed at the end of the second sliding guide rod, and the second V-shaped block is connected to the mounting plate by a second return spring, and a pull handle is fixed on the second V-shaped block for facilitating the movement of the second V-shaped block.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention proposes a multi-specification parts positioning device for a welding machine tool, which can adaptively position flanges of different specifications by utilizing a flange positioning device, and adaptively position and clamp pipes of different specifications by utilizing a centering clamping device, an extrusion device, a rotating mounting frame and a station conversion device. The device can also automatically change the welding direction of the pipe body, thereby eliminating the need to manually change the clamps of the pipe body, and making it unnecessary to replace the fixture when processing bent pipe workpieces of different specifications, thereby reducing the operating steps during processing, solving the problem that the existing positioning device cannot adaptively position and clamp bent pipe parts of different specifications, and can effectively reduce the operating steps and improve welding accuracy and welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a side view of the structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the installation of the base and the rotating mounting frame of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the flange positioning device of the present invention;

[0026] Figure 5 It is a schematic diagram of the installation of the rotating mounting frame and the station conversion device of the present invention;

[0027] Figure 6 It is a schematic diagram of the installation of the centering clamping device and the extrusion device of the present invention;

[0028] Figure 7 It is a schematic diagram of the installation of the rotating seat and the flange positioning device of the present invention;

[0029] Figure 8 It is a schematic diagram of the installation of the rotating seat and the flange clamping arm of the present invention;

[0030] Fig. 9 The figure is a schematic diagram of the clamping of the flange clamping arm to the bent pipe workpiece according to the present invention.

[0031] In the figure: 1, base; 2, centering clamping device; 201, first V-shaped block; 202, first return spring; 203, first sliding guide rod; 204, connecting seat; 3, extrusion device; 301, mounting plate; 302, moving seat; 303, extrusion push rod; 304, direction fine-tuning motor; 4, pre-clamping device; 401, second V-shaped block; 402, second sliding guide rod; 403, second return spring; 404, pull handle; 5, rotating mounting frame; 501, main shaft; 502, first gear ring; 503, connecting frame; 6, flange positioning device; 601, hole centering rod; 602, clamping matching slide groove; 603 , pressure sensor; 604, top support frame; 605, centering groove; 606, lifting push rod; 607, sliding rod; 608, height adjustment push rod; 7, work station conversion device; 701, angle adjustment motor; 702, fixed frame; 703, first screw motor; 8, pipe bending workpiece; 801, pipe body; 802, flange; 9, rotating seat; 10, lifting and lowering adjustment push rod; 11, top plate; 12, top rotating motor; 13, first driving wheel; 14, controller; 15, bottom rotating motor; 16, second driving wheel; 17, flange clamping arm; 18, second screw motor; 19, second gear ring; 20, support table. DETAILED DESCRIPTION

[0032] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0036] Example 1: Please refer to Figures 1 to 9 The present invention provides a multi-specification parts positioning device for a welding machine tool, including a base 1, a rotating mounting frame 5, a station conversion device 7 and a controller 14. A rotating seat 9 is rotatably mounted on the base 1, and a support platform 20 is fixedly mounted on the rotating seat 9. A flange positioning device 6 for positioning flanges 802 of different specifications for forming a bent pipe workpiece 8 is fixed on the support platform 20.

[0037] See also Figure 1 , Figure 2 , Figure 3 and Figure 5 The rotating mounting frame 5 includes a main rotating shaft 501 rotatably mounted with the top plate 11, and a connecting frame 503 is fixedly mounted at the bottom of the main rotating shaft 501, a lifting and lowering adjustment push rod 10 for driving the top plate 11 to rise and fall is fixed on the base 1, a top rotating motor 12 is fixedly mounted on the top plate 11, and a first gear ring 502 is fixedly mounted on the main rotating shaft 501, the output end of the top rotating motor 12 drives a first driving wheel 13 which is meshed with the first gear ring 502 and is used to drive the main rotating shaft 501 to rotate, and the top rotating motor 12 is electrically connected to the controller 14, and the main rotating shaft 501 can drive the connecting frame 503 to rotate through the drive of the top rotating motor 12.

[0038] See also Figure 1 , Figure 2 , Figure 3 and Figure 5 A workstation conversion device 7 is respectively arranged at the left and right ends of the rotating mounting frame 5, and the workstation conversion device 7 includes a fixed frame 702, the middle part of the fixed frame 702 is rotatably mounted with the connecting frame 503 through an angle adjustment motor 701, and a pair of extrusion devices 3 are symmetrically arranged on the fixed frame 702, and a first screw motor 703 for driving the extrusion device 3 to move along the fixed frame 702 is installed on the fixed frame 702, and a centering clamping device 2 for clamping pipe bodies 801 of different specifications constituting the bent pipe workpiece 8 is installed at the extrusion output end of the extrusion device 3, and a controller 14 is fixedly installed on the base 1, and the controller 14 is electrically connected to the lifting and adjusting push rod 10, the angle adjustment motor 701 and the first screw motor 703 respectively. By rotating the angle adjustment motor 701, different directions of the pipe body 801 can be aligned with the flange 802, and the height of the bent pipe workpiece 8 can be adjusted by the lifting and adjusting push rod 10.

[0039] See also Figure 1 , Figure 2 , Figure 4 and Fig. 9The flange positioning device 6 includes a sliding rod 607 slidably mounted on the support platform 20, a top support frame 604 is fixedly mounted on the top of the sliding rod 607, and centering grooves 605 with different diameters for correspondingly accommodating flanges 802 of different sizes are arranged at different heights on the top of the top support frame 604, and each centering groove 605 is provided with at least one pair of hole position centering rods 601 for inserting into the holes of the flange 802 for positioning, and the top support frame 604 is provided with a lifting push rod 606 for lifting the hole position centering rod 601 at each hole position centering rod 601, and the lifting push rod 606 is electrically connected to the controller 14, and a pressure sensor 603 for detecting whether the flange 802 is installed is arranged at the edge of each centering groove 605, and the pressure sensor 603 is electrically connected to the controller 14, and the flange positioning device 6 includes a height adjustment push rod 60 fixedly mounted on the rotating seat 9 8, and the output end of the height adjustment push rod 608 is used to drive the sliding rod 607 to rise and fall. The cross-section of the sliding rod 607 is a regular hexagon, and the height adjustment push rod 608 is electrically connected to the controller 14. When the flange positioning device 6 is in use, the operator first inputs the model of the corresponding flange 802 into the controller 14, and then the controller 14 will push out the corresponding hole centering rod 601 through the corresponding lifting push rod 606. At this time, the operator only needs to correctly connect the flange 802 with the hole centering rod 601 to make the flange 802 fall into the corresponding centering groove 605 to be carried. Then the pressure sensor 603 located in the centering groove 605 detects that the flange 802 is installed and subsequent operations can be performed. If the pressure sensor 603 does not detect pressure, it indicates that the flange 802 is not installed or is not installed correctly. At this time, the equipment will continue to wait for the operator's operation.

[0040] See also Figure 7 , Figure 8 and Fig. 9A second screw motor 18 is fixedly mounted on the support platform 20, and the end of the second screw motor 18 is driven by a screw to have a flange clamping arm 17 sliding along the support platform 20, the flange clamping arm 17 is used to clamp the side and top surfaces of the flange 802, and a clamping matching slide groove 602 corresponding to the flange clamping arm 17 is provided on the top support frame 604, the second screw motor 18 is electrically connected to the controller 14, and when the pressure sensor 603 detects pressure, it indicates that the flange 802 has been correctly installed, and at this time, the second screw motor 18 will be based on the operator's pre-input The flange clamping arm 17 processed according to the input model is sent to the corresponding position, and then the flange 802 is lifted up to the specified height by the height adjusting push rod 608 according to the preset flange 802 model, so that the flange clamping arm 17 can correctly clamp the top and side of the flange. When it is necessary to remove the bent pipe workpiece 8, the height adjusting push rod 608 moves downward to lower the bent pipe workpiece 8 to the specified position. At the same time, the flange clamping arm 17 moves outward under the drive of the second screw motor 18, so that the flange clamping arm 17 no longer clamps the flange 802.

[0041] See also Figure 1 , Figure 2 , Figure 5 and Figure 6 The extrusion device 3 includes a moving seat 302, and the output end of the first screw motor 703 drives the moving seat 302 to move along the fixed frame 702 through the screw, and an extrusion push rod 303 is fixedly installed on the moving seat 302, and the output end of the extrusion push rod 303 drives a direction fine-tuning motor 304, and the output end of the direction fine-tuning motor 304 is used to drive the mounting plate 301 to rotate, and the mounting plate 301 is used to install the centering clamping device 2, the extrusion push rod 303 and the direction fine-tuning motor 304 are both electrically connected to the controller 14, and the first screw motor 703 can drive the moving seat 302 to move, so that the two moving seats 302 can be appropriately adjusted in position according to the bent pipe workpiece 8 that does not provide a size model. When the bending angle of the tube body 801 also changes, the direction fine-tuning motor 304 can also be used to adjust the clamping direction of the centering clamping device 2, so that it can be effectively clamped on the tube body 801.

[0042] See also Figure 1 , Figure 2 , Figure 5 and Figure 6The centering clamping device 2 includes a connecting seat 204 fixedly mounted on the mounting plate 301, and a first sliding guide rod 203 is slidably mounted in the connecting seat 204, a first V-shaped block 201 for clamping the tube body 801 is fixedly mounted on the first sliding guide rod 203, and the first V-shaped block 201 and the connecting seat 204 are connected by a first return spring 202, and the inner side of the first V-shaped block 201 is used to clamp the tube body 801, so that tube bodies 801 of different diameters can be clamped by the first V-shaped block 201, and the first V-shaped block 201 itself is a symmetrical structure, so that when the first V-shaped blocks 201 located at symmetrical positions at both ends of the connecting frame 503 clamp the tube body 801 at the same time, the two sides of the first V-shaped block 201 will be automatically clamped at the symmetrical positions on both sides of the tube body 801, so that the centering clamping of the tube body 801 can be achieved, ensuring that the central axis of the tube body 801 and the central axis of the flange 802 can be consistent.

[0043] The working process of the multi-specification parts positioning device for welding machines designed in this embodiment will be described in detail below: First, the multi-specification parts positioning device for welding machines is a special fixture equipment specially used for processing bent pipe workpieces 8. For the sake of convenience, the multi-specification parts positioning device for welding machines will be referred to as the positioning device below. Specifically, when it is necessary to weld two flanges 802 to the two ends of the tube body 801 of the bent pipe workpiece 8 through a welding machine, the tube body 801 and the flange 802 need to be positioned and fixed through the positioning device. Since the bent pipe workpiece 8 has various specifications, the sizes and specifications of the pipe body 801 and the flange 802 will have various changes. Specifically, the pipe body 801 may have changes in the diameter of the pipe body 801, changes in the length of the pipe body 801, and different bending angles at both ends of the pipe body 801, while the flange 802 may have changes in the diameter of the flange 802, different hole positions on the flange 802, and different thicknesses of the flange 802. Therefore, the role of the positioning device is to automatically adapt to the above-mentioned possible specification changes of the pipe body 801 and the flange 802, so as to ensure that the pipe body 801 and the flange 802 of the corresponding specifications can be directly clamped correctly to facilitate the normal welding of the welding machine. Before positioning and clamping, the device is first correctly fixed on the welding machine, and then the operator inputs the model of the bent pipe workpiece 8 to be formed by welding, so that the controller 14 can find the size information of the pipe body 801 and the size information of the flange 802 to be clamped from the model information of the bent pipe workpiece 8, and then the controller 14 initializes the positioning device, so that the top plate 11 rises to the highest point under the adjustment of the lifting adjustment push rod 10, and the top support frame 604 is driven by the height adjustment push rod 608 to descend to the lowest point, and at least one pair of required hole centering rods 601 located on the top support frame 604 will be driven by the corresponding lifting push rod 606. At the same time, according to the size, angle and diameter of the pipe body 801, the controller 14 will also use the first screw motor 703 to adjust the position of the extrusion device 3, use the direction fine-tuning motor 304 to adjust the direction of the first V-shaped block 201, and use the extrusion push rod 303 to adjust the spacing between the first V-shaped blocks 201 in the two relatively arranged centering clamping devices 2.Then the operator can put the flange 802 on the hole centering rod 601, and the flange 802 will gradually drop into the corresponding centering groove 605 under the positioning of the hole centering rod 601, and then the weight of the flange 802 itself will be detected by the pressure sensor 603. The pressure sensor 603 can also be replaced with other sensors that can detect whether the flange 802 is installed in place. When the pressure sensor 603 detects the flange 802, the controller 14 will drive the flange clamping arm 17 to move to the corresponding position, and then lift the flange 802 upward to the specified height through the height adjustment push rod 608 so that the flange clamping arm 17 can effectively clamp the top and side of the flange 802. If the model of the flange 802 placed by the operator does not correspond, there will be three consequences after the flange 802 is placed. First, the hole position of the flange 802 is incorrect and it will not be able to be correctly connected with the hole centering rod 601, so it cannot be put in. Secondly, the flange 802 If the disk diameter is incorrect, the flange 802 cannot fall correctly into the corresponding centering groove 605, and thus cannot be detected by the corresponding pressure sensor 603. Finally, if the thickness of the flange 802 is incorrect, after the height adjustment push rod 608 is lifted upward to the specified height, when the disk thickness is smaller, the upper end of the disk cannot properly contact the flange clamping arm 17, so that the flange clamping arm 17 cannot apply a clamping force to the disk. At this time, the pressure value detected by the pressure sensor 603 will not meet expectations. When the disk thickness is larger, before the height adjustment push rod 608 lifts the flange 802 to the specified height, the flange clamping arm 17 will contact the flange 802, so that the pressure sensor 603 detects an excessively high clamping force in advance, thereby triggering the fault handling procedure set in the controller 14. Therefore, the above method can effectively prevent flanges 802 of different specifications from being placed incorrectly on the flange positioning device 6, thereby ensuring the correct installation of the flange 802.When the flange 802 is installed, the operator can install the pipe body 801. During installation, since the two ends of the pipe body 801 need to be clamped by two pairs of symmetrically arranged centering clamping devices 2 located at corresponding positions, the user only needs to correctly place the pipe body 801 in the two centering clamping devices 2 located on the same side of the pipe body 801 and then drive the extrusion push rod 303 through the controller 14 so that the centering clamping devices 2 can clamp the pipe body 801. During clamping, the two pairs of symmetrically arranged centering clamping devices 2 will clamp the pipe body 801 at the same time, so that when the pipe body 801 is tilted, it will be corrected under the drive of the centering clamping devices 2 at the relative position, and since the first V-shaped block 201 can move along the connecting seat 204, the first V-shaped block 201 can move along the connecting seat 204. It slides in the same direction along the axis of the tube body 801, so that the two teams of centering and clamping devices 2 have the ability to automatically center the tube body 801, thereby effectively ensuring the clamping accuracy of the tube body 801. Corresponding detection sensors, such as preload force sensors, can also be installed on the first V-shaped block 201 to detect whether the tube body 801 is clamped correctly. If the tube body 801 is not detected by the detection sensor when the extrusion push rod 303 moves to the specified stroke, it can be judged that the diameter of the tube body 801 is too small. If the tube body 801 is detected before the extrusion push rod 303 moves to the specified stroke, it indicates that the diameter of the tube body 801 is too large, and the controller 14 will remind the operator to replace it through the corresponding alarm device. When the tube body 801 and the flange 802 are positioned and clamped, the controller 14 can start to control the tube body 801 to start docking with the flange 802. First, the intersection of the central axis of the straight tube sections at both ends of the tube body 801 intersects with the axis of the rotating shaft of the angle adjustment motor 701. This ensures that the rotation of the angle adjustment motor 701 can make any end of the tube body 801 aligned with the flange 802. The intersection of the central axis of the straight tube sections at both ends of the tube body 801 intersects with the angle adjustment motor 701. This feature is determined by two factors. First, the two centering clamping devices 2 located on the same fixed frame 702 are symmetrically arranged relative to the angle adjustment motor 701. Second, When encountering a tube body 801 with different bending angles, the positions of the two centering clamping devices 2 can also be symmetrically adjusted through the first screw motor 703, thereby offsetting the intersection of the central axes of the straight tube sections at both ends of the tube body 801, so that the intersection intersects with the axis of the rotating shaft of the angle adjustment motor 701, thereby ensuring that the adjustment of the angle adjustment motor 701 can make both ends of the tube body 801 able to be aligned with the flange 802, and then the controller 14 first aligns one end of the tube body 801 with the flange 802 and performs welding operations, and then rotates the fixing frame 702 to the non-working position and replaces the new flange 802, so that the other end of the tube body 801 can also be aligned with the flange 802 and perform welding operations.When the end of the tube body 801 enters the welding process with the flange 802, the controller 14 first drives the tube body 801 to descend to a specified height using the lifting and adjusting push rod 10 according to the model of the tube body 801, so that the tube body 801 can be just aligned and pressed with the flange 802 at the bottom of the end, and then the welding machine can perform welding operations on the connection between the tube body 801 and the flange 802. During the welding process, the main rotating shaft 501 can also be driven to rotate by the top rotating motor 12, thereby driving the tube body 801 to rotate along the central axis of the disk surface of the flange 802. Since the end of the tube body 801 is squeezed by the flange 802, the flange 802 will rotate synchronously with the tube body 801 under the action of friction. At this time, the welding machine can perform annular welding along the joint between the flange 802 and the tube body 801. The main rotating shaft 501 can rotate concentrically with the flange 802 because the central axis of the main rotating shaft 501 coincides with the central axis of the flange 802. After the flanges 802 are welded to both ends of the tube body 801, the flange clamping arm 17 can loosen the flanges 802 by manually issuing instructions to the controller 14, and the centering clamping device 2 can loosen the tube body 801 at the same time, and then the processed bent pipe workpiece 8 can be removed manually or by a manipulator. Therefore, the positioning device of the equipment can quickly position and clamp bent pipe workpieces 8 of different specifications, so there is no need to replace different clamps for bent pipe workpieces 8 of different specifications, and there is no need to change clamps when welding the two ends of the same bent pipe workpiece 8, which can effectively reduce the steps of manual operation, thereby improving the efficiency and welding accuracy of the welding process. Thereby solving the problem that the existing positioning device cannot perform adaptive positioning and clamping for bent pipe parts of different specifications, and can effectively reduce the operation steps and improve the welding accuracy and welding efficiency.

[0044] Example 2: Please refer to Figure 1 , Figure 2 and Figure 3 On the basis of the first embodiment, a bottom rotating motor 15 is fixedly mounted on the base 1, and a second gear ring 19 is fixedly mounted on the rotating seat 9. The output end of the bottom rotating motor 15 drives a second driving wheel 16 which is meshed with the second gear ring 19 and is used to drive the rotating seat 9 to rotate. The bottom rotating motor 15 is electrically connected to the controller 14. The bottom rotating motor 15 can be used to drive the rotating seat 9 to rotate, thereby driving the flange 802 mounted on the rotating seat 9 to rotate, ensuring that the flange 802 can rotate synchronously with the pipe body 801 during the welding process, facilitating the welding machine to correctly weld the flange 802 and the pipe body 801 together, further solving the problem that the existing positioning device cannot perform adaptive positioning and clamping for bent pipe parts of different specifications, and can effectively reduce the operation steps and improve welding accuracy and welding efficiency.

[0045] Example 3: Please refer to Figure 2, Figure 3 , Figure 5 and Figure 6 On the basis of the second embodiment, a pre-clamping device 4 for pre-clamping the tube body 801 is fixedly installed on the mounting plate 301, and the pre-clamping device 4 includes a second sliding guide rod 402 slidably installed with the mounting plate 301, and a second V-shaped block 401 for clamping the tube body 801 is fixedly installed at the end of the second sliding guide rod 402, and the second V-shaped block 401 is connected to the mounting plate 301 through a second reset spring 403, and a pull handle 404 for conveniently moving the second V-shaped block 401 is fixed on the second V-shaped block 401. The tube body 801 needs to be clamped by the centering clamping device 2. If the centering clamping device 2 is clamped during the clamping process, If the tube body 801 still needs to be manually held and fixed during the process, the movement of the centering clamping device 2 may injure the operator. Therefore, after the pre-clamping device 4 is set, the operator only needs to pull the handle 404 and then pre-clamp the two ends of the tube body 801 with two pairs of pre-clamping devices 4. Then, the centering clamping device 2 can center and clamp the tube body 801 on the basis of the clamping of the pre-clamping device 4, thereby ensuring the safety and convenience of clamping, and further solving the problem that the existing positioning device cannot perform adaptive positioning and clamping for bent pipe parts of different specifications, which can effectively reduce the operating steps and improve welding accuracy and welding efficiency.

[0046] Embodiment 4: Based on Embodiment 3, the present invention further provides a method for using a multi-specification parts positioning device for a welding machine tool, comprising the following steps:

[0047] Step 1: Before positioning and clamping, the operator first inputs the model of the bent pipe workpiece 8 to be formed by welding, so that the controller 14 can find the size information of the tube body 801 and the size information of the flange 802 to be clamped from the model information of the bent pipe workpiece 8, and then the controller 14 initializes the positioning device, so that the top plate 11 rises to the highest point under the adjustment of the lifting adjustment push rod 10, and the top support frame 604 descends to the lowest point driven by the height adjustment push rod 608. At the same time, at least one pair of required hole centering rods 601 located on the top support frame 604 will be ejected under the drive of the corresponding lifting push rod 606. At the same time, according to the size of the tube body 801, the angle between the two ends and the diameter, the controller 14 will also use the first screw motor 703 to adjust the position of the extrusion device 3, and use the direction fine-tuning motor 304 to adjust the first V-shaped block 201 The direction is adjusted, and the distance between the first V-shaped blocks 201 in the two relatively arranged centering clamping devices 2 is adjusted by using the extrusion push rod 303. Then the operator can sleeve the flange 802 on the hole centering rod 601. The flange 802 will gradually drop into the corresponding centering groove 605 under the positioning of the hole centering rod 601. Then the weight of the flange 802 itself will be detected by the pressure sensor 603. The pressure sensor 603 can also be replaced by other sensors that can detect whether the flange 802 is installed in place. When the pressure sensor 603 detects the flange 802, the controller 14 will drive the flange clamping arm 17 to move to the corresponding position, and then lift the flange 802 upward to the specified height through the height adjustment push rod 608 so that the flange clamping arm 17 can effectively clamp the top and side of the flange 802.

[0048] Step 2: After the flange 802 is installed, the operator can install the pipe body 801. During installation, since the two ends of the pipe body 801 need to be clamped by two pairs of symmetrically arranged centering clamping devices 2 located at corresponding positions, the user only needs to correctly place the pipe body 801 in the two centering clamping devices 2 located on the same side of the pipe body 801, and use the pre-clamping device 4 to pre-clamp it, and then drive the extrusion push rod 303 through the controller 14 so that the centering clamping device 2 can clamp the pipe body 801. The tube body 801 is clamped, and during clamping, the two pairs of symmetrically arranged centering clamping devices 2 will clamp the tube body 801 with force at the same time, so that when the tube body 801 is tilted, it will be corrected under the drive of the centering clamping devices 2 at the relative position, and because the first V-shaped block 201 can slide along the connecting seat 204 in the same direction along the axis of the tube body 801, the two pairs of centering clamping devices 2 have the ability to automatically center the tube body 801, thereby effectively ensuring the clamping accuracy of the tube body 801;

[0049] Step 3: After the tube body 801 and the flange 802 are positioned and clamped, the controller 14 can start to control the tube body 801 to start docking with the flange 802. First, the intersection of the central axis of the straight tube sections at both ends of the tube body 801 intersects with the axis of the rotating shaft of the angle adjustment motor 701, which ensures that the rotation of the angle adjustment motor 701 can make any end of the tube body 801 aligned with the flange 802. Then the controller 14 first aligns one end of the tube body 801 with the flange 802 and performs welding operations, and then rotates the fixing frame 702 to the non-working position and replaces the new flange 802, so that the other end of the tube body 801 can also be aligned with the flange 802 and perform welding operations. When the end of the tube body 801 enters the welding process with the flange 802, the controller 14 first uses the lifting adjustment push rod 10 to drive the tube body 801 to descend to a specified height according to the model of the tube body 801. , so that the tube body 801 can be just aligned and pressed with the flange 802 at the bottom of the end, and then the welding machine can perform welding operation on the connection between the tube body 801 and the flange 802. During the welding process, the main rotating shaft 501 can be driven to rotate by the top rotating motor 12, thereby driving the tube body 801 to rotate along the central axis of the disk surface of the flange 802. Since the end of the tube body 801 is squeezed by the flange 802, the flange 802 will rotate synchronously with the tube body 801 under the action of friction. At this time, the welding machine can perform annular welding along the joint between the flange 802 and the tube body 801. After the flanges 802 are welded to both ends of the tube body 801, the flange clamping arm 17 can loosen the flange 802 by manually issuing instructions to the controller 14, and at the same time, the centering clamping device 2 loosens the tube body 801, and then the processed bent pipe workpiece 8 can be removed manually or by a robot.

[0050] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A multi-specification parts positioning device for a welding machine tool, characterized in that: include: A base (1), a rotating seat (9) being rotatably mounted on the base (1), a supporting platform (20) being fixedly mounted on the rotating seat (9), and a flange positioning device (6) being fixedly mounted on the supporting platform (20) for positioning flanges (802) of different specifications for forming a bent pipe workpiece (8); A rotatable mounting frame (5), the rotatable mounting frame (5) comprising a main rotating shaft (501) rotatably mounted with the top plate (11), a connecting frame (503) being fixedly mounted at the bottom of the main rotating shaft (501), and a lifting and lowering adjustment push rod (10) for driving the top plate (11) to rise and fall being fixed on the base (1); A workstation conversion device (7), wherein a workstation conversion device (7) is disposed at each of the left and right ends of the rotating mounting frame (5), and the workstation conversion device (7) comprises a fixed frame (702), the middle portion of the fixed frame (702) being rotatably mounted with a connecting frame (503) via an angle adjustment motor (701), and a pair of extrusion devices (3) being symmetrically disposed on the fixed frame (702), a first screw motor (703) being mounted on the fixed frame (702) for driving the extrusion device (3) to move along the fixed frame (702) via a screw, and a centering clamping device (2) for clamping pipe bodies (801) of different specifications constituting a pipe bending workpiece (8) being mounted at an extrusion output end of the extrusion device (3); The controller (14) is fixedly mounted on the base (1), and the controller (14) is electrically connected to the lifting adjustment push rod (10), the angle adjustment motor (701) and the first screw motor (703) respectively. The flange positioning device (6) comprises a sliding rod (607) slidably mounted on the support platform (20), a top support frame (604) is fixedly mounted on the top of the sliding rod (607), and the top of the top support frame (604) is provided with different diameters at different heights for A centering groove (605) is provided corresponding to the flanges (802) of different sizes, and each of the centering grooves (605) is provided with at least one pair of hole centering rods (601) for inserting into the holes of the flanges (802) for positioning, and a top support frame (604) is provided with a lifting push rod (606) for lifting the hole centering rod (601) at the position corresponding to each hole centering rod (601), and the lifting push rod (606) is electrically connected to the controller (14). The extrusion device (3) includes The movable seat (302) is provided with a first screw motor (703), and the output end of the first screw motor (703) drives the movable seat (302) to move along the fixed frame (702) through the screw, an extrusion push rod (303) is fixedly mounted on the movable seat (302), and the output end of the extrusion push rod (303) drives a direction fine-tuning motor (304), the output end of the direction fine-tuning motor (304) is used to drive the mounting plate (301) to rotate, and the mounting plate (301) is used to install the centering clamping device (2), and the extrusion push rod (303) is fixedly mounted on the movable seat (302). ) and a direction fine-tuning motor (304) are both electrically connected to a controller (14), the centering clamping device (2) comprising a connecting seat (204) fixedly mounted on a mounting plate (301), and a first sliding guide rod (203) slidably mounted in the connecting seat (204), a first V-shaped block (201) for clamping the tube body (801) being fixedly mounted on the first sliding guide rod (203), and the first V-shaped block (201) and the connecting seat (204) are connected via a first return spring (202).

2. A multi-specification parts positioning device for welding machine tools according to claim 1, characterized in that: A bottom rotating motor (15) is fixedly mounted on the base (1), and a second gear ring (19) is fixedly mounted on the rotating seat (9); an output end of the bottom rotating motor (15) drives a second driving wheel (16) meshing with the second gear ring (19) and used to drive the rotating seat (9) to rotate; and the bottom rotating motor (15) is electrically connected to a controller (14).

3. The multi-specification parts positioning device for welding machine tools according to claim 1, characterized in that: A second screw motor (18) is fixedly mounted on the support platform (20), and the end of the second screw motor (18) is driven by a screw to have a flange clamping arm (17) that slides along the support platform (20), the flange clamping arm (17) being used to clamp the side and top surfaces of the flange plate (802), and a clamping matching groove (602) corresponding to the flange clamping arm (17) is provided on the top support frame (604), and the second screw motor (18) is electrically connected to the controller (14).

4. The multi-specification parts positioning device for welding machine tools according to claim 1, characterized in that: A pressure sensor (603) for detecting whether the flange (802) is installed is provided at the edge of each centering groove (605), and the pressure sensor (603) is electrically connected to the controller (14).

5. The multi-specification parts positioning device for welding machine tools according to claim 1, characterized in that: The flange positioning device (6) comprises a height adjustment push rod (608) fixedly mounted on the rotating seat (9), and the output end of the height adjustment push rod (608) is used to drive the sliding rod (607) to move up and down, the cross section of the sliding rod (607) is a regular hexagon, and the height adjustment push rod (608) is electrically connected to the controller (14).

6. The multi-specification parts positioning device for welding machine tools according to claim 1, characterized in that: A top rotating motor (12) is fixedly mounted on the top plate (11), and a first gear ring (502) is fixedly mounted on the main rotating shaft (501); an output end of the top rotating motor (12) drives a first driving wheel (13) meshing with the first gear ring (502) and used to drive the main rotating shaft (501) to rotate, and the top rotating motor (12) is electrically connected to a controller (14).

7. The multi-specification parts positioning device for welding machine tools according to claim 1, characterized in that: A pre-clamping device (4) for pre-clamping the tube body (801) is fixedly mounted on the mounting plate (301), and the pre-clamping device (4) comprises a second sliding guide rod (402) slidably mounted on the mounting plate (301), a second V-shaped block (401) for clamping the tube body (801) is fixedly mounted at the end of the second sliding guide rod (402), and the second V-shaped block (401) is connected to the mounting plate (301) via a second return spring (403), and a pull handle (404) for facilitating the movement of the second V-shaped block (401) is fixed on the second V-shaped block (401).

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