A clamping tool for a profiled part

Abstract

The application discloses a clamping tool for special-shaped parts, and relates to the technical field of machining equipment. The clamping tool comprises a workbench, a clamping area provided on the workbench, a positioning seat fixed on the workbench, a plurality of sliding seats slidably arranged on the workbench and driven to move around the clamping area, a plurality of clamping mechanisms arranged on the sliding seats and the positioning seat respectively, a position acquisition unit for acquiring the position of a pipe to be welded, and a control unit electrically connected with the position acquisition unit, used for receiving the position information acquired by the position acquisition unit, adjusting the angle between the sliding seat and the positioning seat, and making the pipe to be welded on each clamping mechanism splice together according to a preset angle. The control unit controls the sliding seat to move according to the preset welding angle and the received position information, so that the angle between the sliding seat and the positioning seat is the same as the preset welding angle, and the welding ends of the pipe to be welded are spliced together.

Description

Technical Field

[0001] This application relates to the field of processing equipment technology, and in particular to a clamping fixture for irregularly shaped parts. Background Technology

[0002] Irregularly shaped parts refer to components whose shape and structure differ significantly from traditional standard parts. Among them, rod and tube fittings are particularly important in industrial equipment, especially stainless steel tube fittings. These irregularly shaped parts are specially processed or customized components with irregular shapes, such as multi-port fittings.

[0003] Multi-way pipe fittings are formed by processing multiple pipes and then welding them together according to requirements. During the welding process, multiple clamps are needed to hold the pipes together depending on the number of channels. Due to the inherent characteristics of the parts, the angles at the joints of different models of multi-way pipe fittings are different, resulting in welding trajectories that are not straight lines. Currently, the clamping devices used for welding cannot adjust the clamping direction according to the angles at the joints of multi-way pipe fittings, and cannot simultaneously clamp and fix multiple pipes at different angles. Therefore, the welding of multi-way pipe fittings can only be completed by welding one channel at a time, and it is not possible to weld multiple pipes simultaneously.

[0004] Therefore, there is a need for a clamping fixture for irregularly shaped parts that can clamp and fix multi-port pipes so that welding of multi-port pipes can be completed simultaneously. Summary of the Invention

[0005] The main purpose of this application is to provide a clamping fixture for irregularly shaped parts, which aims to solve the technical problem that existing welding clamping devices cannot simultaneously clamp and fix multiple pipes at different angles.

[0006] To achieve the above objectives, this application provides a clamping fixture for irregularly shaped parts, comprising: The workbench has openings and a clamping area. The positioning seat is fixedly mounted on the worktable; Multiple sliding seats are slidably disposed on the worktable and can be driven to move around the clamping area; Multiple clamping mechanisms are respectively disposed on the plurality of sliding seats and the positioning seats. The clamping mechanism on the positioning seat is used to clamp one of the pipe fittings to be welded, and the clamping mechanism on the sliding seat is used to clamp and fix the remaining pipe fittings to be welded. The position acquisition unit, set on the workbench, is used to acquire the position of the pipe fitting to be welded; The control unit is electrically connected to the position acquisition unit and is used to receive the position information acquired by the position acquisition unit and to adjust the angle between the sliding seat and the positioning seat so that the pipes to be welded on each set of clamping mechanisms are spliced ​​together at a preset angle.

[0007] Optionally, an annular guide rail is provided around the clamping area on the worktable, and the sliding seat is slidably disposed on the guide rail.

[0008] Optionally, the worktable is provided with multiple sets of drive mechanisms for driving the sliding seat to move, the drive mechanisms including: The driving component is mounted on the worktable; A drive gear is disposed at the drive end of the drive component; A rack is disposed on one side of the sliding seat. The rack is arc-shaped and meshes with the drive gear. The driving component drives the sliding seat to move along the guide rail via the rack and the driving gear.

[0009] Optionally, the arc length of the rack is greater than the length of the slide seat, and both ends of the rack extend beyond the slide seat.

[0010] Optionally, the racks on two adjacent sliding seats are located at different heights, forming a misaligned structure.

[0011] Optionally, the clamping mechanism includes: A telescopic drive component is disposed on the positioning seat and the sliding seat, and the telescopic end of the telescopic drive component extends into the clamping area; A fixing component is provided at the telescopic end of the telescopic drive component and is used to clamp and fix the pipe fitting to be welded.

[0012] Optionally, the fixing component includes: Two clamping plates are slidably disposed at the ends of the telescopic drive component, and the opposite sides of the two clamping plates are used to clamp the pipe fitting to be welded. A bidirectional lead screw is rotatably mounted at the end of the telescopic drive component, and the two threads of the bidirectional lead screw respectively engage with the threads of the two clamping plates.

[0013] Optionally, the clamping mechanism further includes a positioning post, which is disposed at the end of the telescopic drive member and located between the two clamping plates. The positioning post is tapered to be inserted into pipes of different diameters.

[0014] Optionally, the clamping surface of the positioning plate is provided with an arc-shaped limiting groove.

[0015] Optionally, the location acquisition unit includes: A mounting bracket is provided on the workbench; An industrial camera is mounted on the workbench and is used to capture the position of the pipe to be welded within the clamping area. The industrial camera is electrically connected to the control unit.

[0016] The beneficial effects achieved by this application are as follows: During welding, the pre-processed pipe fittings that need to be welded together are clamped and fixed by the clamping mechanism. The position acquisition unit collects the position information of the pipe fittings in the clamping area and transmits the collected information to the control unit. According to the received position information, the control unit controls the sliding seat to move according to the preset welding angle, so that the angle between the sliding seat and the positioning seat is the same as the preset welding angle, splicing the welding ends of the pipe fittings to be welded together, which facilitates subsequent welding and fixing. It can clamp multiple pipe fittings that need to be welded at the same time and complete the welding in one go. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of a clamping fixture for irregularly shaped parts, according to an embodiment of this application. Figure 2 for Figure 1 Enlarged view of section A; Figure 3 This is a schematic diagram of the installation of the clamping plate in an embodiment of this application; Figure 4 This is a schematic diagram showing the positional relationship between two adjacent racks in an embodiment of this application.

[0019] Figure label: 1-Workbench, 2-Positioning seat, 3-Sliding seat, 4-Guide rail, 5-Drive component, 6-Drive gear, 7-Rack, 8-Telescopic drive component, 9-Clamping plate, 10-Double lead screw, 11-Limit groove, 12-Mounting bracket, 13-Industrial camera, 14-Positioning column.

[0020] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0023] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0025] Example 1 See attached document Figures 1-4 This embodiment provides a clamping fixture for irregularly shaped parts, including: Workbench 1, with openings on workbench 1 providing a clamping area; Positioning seat 2 is fixedly mounted on workbench 1; Multiple sliding seats 3 are slidably disposed on the worktable 1 and can be driven to move around the clamping area; Multiple clamping mechanisms are respectively set on multiple sliding seats 3 and positioning seats 2. The clamping mechanism on the positioning seat 2 is used to clamp one of the pipe fittings to be welded, and the clamping mechanism on the sliding seat 3 is used to clamp and fix the remaining pipe fittings to be welded. The position acquisition unit is set on the workbench 1 and is used to acquire the position of the pipe fitting to be welded; The control unit is electrically connected to the position acquisition unit and is used to receive the position information acquired by the position acquisition unit. It is also used to adjust the angle between the sliding seat 3 and the positioning seat 2 so that the pipes to be welded on each set of clamping mechanisms are spliced ​​together at a preset angle.

[0026] In this embodiment, the clamping area is a specially defined or perforated area on the workbench 1, used to place irregular parts to be welded, especially pipes. The clamping area is a circular hole. The positioning seat 2 is fixedly set on the workbench 1. Its main function is to provide a fixed clamping point or reference point for one of the pipes to be welded. Through the positioning seat 2, it can be ensured that the position of at least one pipe is preset and unchanged.

[0027] The sliding seat 3 can be slidably mounted on the worktable 1 and can be driven to move around the clamping area. The mobility of the sliding seat 3 allows the clamping mechanism mounted on it to adjust its position to adapt to the clamping requirements of irregular parts with different shapes and angles. The number of sliding seats 3 can be set according to actual needs.

[0028] Specifically, the worktable 1 can be a flat metal plate with a through hole formed by machining as a clamping area. The positioning seat 2 can be a bracket fixed to the worktable 1 by bolts or welding, and has an interface for installing the clamping mechanism. In another implementation, the positioning seat 2 can be integrally formed with the worktable 1 to improve the overall rigidity and stability.

[0029] A position acquisition unit is set on the workbench 1 to acquire the position information of the pipe to be welded. This unit is the basis for realizing automated adjustment. In one implementation, the position acquisition unit can be an industrial camera 13, which acquires the position data of the pipe by taking pictures of it. In another implementation, the position acquisition unit can be composed of multiple contact sensors, which acquire its spatial coordinates by contacting the surface of the pipe.

[0030] The control unit is electrically connected to the position acquisition unit. The control unit receives the position information acquired by the position acquisition unit and adjusts the angle between the sliding seat 3 and the positioning seat 2 according to this information so that the pipe fittings to be welded on each clamping mechanism are spliced ​​together at a preset angle. For example, the control unit can be a programmable logic controller (PLC) with preset splicing angle data for different irregular parts. When the position information is received, the PLC calculates the distance and direction that the sliding seat 3 needs to move according to the algorithm and outputs control signals to the drive device. In another implementation, the control unit can be a microprocessor-based embedded system that processes the position information and precisely controls the movement of the sliding seat 3 through software algorithms.

[0031] The following is an example illustrating the process of welding a "T"-shaped multi-port pipe consisting of three pipes. The clamping mechanism on the positioning seat 2 is operated to clamp the first pipe to be welded, fixing it in a preset reference position. Subsequently, the clamping mechanisms on the two sliding seats 3 clamp the remaining two pipes to be welded respectively.

[0032] At this time, the position acquisition unit starts to work. For example, the position acquisition unit can be an industrial camera 13 installed above or to the side of the workbench 1, which acquires images of the three pipes to be welded in the clamping area, and the acquired image data is transmitted to the control unit.

[0033] After receiving the image data, the control unit uses a built-in image processing algorithm to accurately identify the actual spatial position and relative angle of the three pipe fittings to be welded. For example, the control unit can calculate the actual angle between the pipe fittings on the two sliding seats 3 and the pipe fittings on the positioning seat 2, and compare this actual angle with the preset splicing angle of the "T" shaped pipe fittings.

[0034] Based on the comparison results, the control unit calculates the precise distance and direction that each sliding seat 3 needs to move so that the pipes on the two sliding seats 3 can form a preset "T" shaped splicing angle with the pipes on the positioning seat 2. For example, if the angle of a pipe on a certain sliding seat 3 is found to be deviated, the control unit will issue a command to drive the sliding seat 3 to move around the clamping area along the worktable 1 until the pipes on it reach the correct splicing angle.

[0035] Once all the sliding seats 3 have moved to the designated position, the control unit verifies again through the position acquisition unit to ensure that all the pipe fittings to be welded are precisely spliced ​​together at the preset angle. Once the angle is confirmed to be correct, all the pipe fittings are firmly clamped and fixed, waiting for the subsequent welding operation. In this way, the three pipe fittings can be fixed in the correct welding position at the same time, thus creating conditions for completing the welding of multiple pipe fittings at one time.

[0036] As an optional implementation, a ring-shaped guide rail 4 is provided around the clamping area on the worktable 1, and the sliding seat 3 is slidably disposed on the guide rail 4.

[0037] In this embodiment, the annular guide rail 4 can guide the component to move in a circular or arc shape. The guide rail 4 can be implemented in various forms. For example, it can be designed as a V-shaped guide rail 4 or a U-shaped guide rail 4, which provides stable support and guidance by cooperating with the rollers or sliders at the bottom of the sliding seat 3. Alternatively, it can be formed into an annular shape by bending or segmenting the linear guide rail 4. It can even be formed by combining a ball screw with a guide groove. Its main function is to ensure that the sliding seat 3 maintains a stable movement trajectory during movement, reduce lateral sway, and improve positioning accuracy.

[0038] As an optional implementation, the worktable 1 is provided with multiple sets of drive mechanisms for moving the sliding block 3, the drive mechanisms including: Drive component 5 is mounted on worktable 1; The drive gear 6 is located at the drive end of the drive component 5; Rack 7 is located on one side of sliding seat 3. Rack 7 is arc-shaped and meshes with drive gear 6. The driving component 5 drives the sliding seat 3 to move along the guide rail 4 via the rack 7 and the driving gear 6.

[0039] In this embodiment, the driving component 5 can be a servo motor, a stepper motor, or a DC motor, and the driving gear 6 can be of various types such as spur gear, helical gear, or bevel gear. Its selection depends on factors such as transmission efficiency, load-bearing capacity, and spatial layout. The driving gear 6 is coaxially mounted on the driving end of the motor.

[0040] The function of rack 7 is to convert the rotational motion of drive gear 6 into the linear motion of sliding seat 3, allowing it to move along guide rail 4. The arc-shaped design allows rack 7 to match the curvature of the annular guide rail 4, ensuring that the gear and rack 7 maintain a stable meshing relationship as sliding seat 3 moves around the clamping area.

[0041] In one specific implementation, the driving component 5 can be a servo motor connected to the driving gear 6 via a reducer. The driving gear 6 can be a high-precision spur gear with optimized tooth profile to ensure smooth meshing with the rack 7. The rack 7 can be a precision-machined arc-shaped rack made of wear-resistant alloy steel and fixed to one side of the sliding seat 3. The curvature of the rack 7 matches the curvature of the annular guide rail 4 on the worktable 1, ensuring that the driving gear 6 maintains a stable meshing state with the rack 7 as the sliding seat 3 moves along the guide rail 4. When the servo motor receives a command from the control unit, it precisely drives the driving gear 6 to rotate, thereby causing the rack 7 and the sliding seat 3 to move along the annular guide rail 4 to a preset displacement, thus achieving precise angle adjustment of the pipe to be welded.

[0042] As an alternative implementation, the arc length of the rack 7 is greater than the length of the slide seat 3, and both ends of the rack 7 extend beyond the slide seat 3.

[0043] In this embodiment, the arc length of the rack 7 is greater than the length of the sliding seat 3. This is to ensure that the drive gear 6 can provide a greater stroke for the sliding seat 3 during the entire stroke of the sliding seat 3 moving along the guide rail 4, so that the sliding seat 3 can move a greater distance to accommodate more multi-port pipe fittings with different angles. At the same time, it also ensures that the drive gear 6 can always maintain stable and full engagement with the rack 7.

[0044] The two ends of the rack 7 extend into the sliding seat 3, which can provide the sliding seat 3 with a larger travel distance in two directions. At the same time, it can also ensure that the drive gear 6 can still maintain full engagement with the rack 7 when the sliding seat 3 moves to the limit of its travel. This reduces the possibility that the drive gear 6 will disengage due to the rack 7 being too short when the sliding seat 3 is about to reach or leave a certain position, thereby ensuring the continuity and stability of the drive.

[0045] Specifically, the rack 7 is located on the side of the slide seat 3 away from the clamping area. The installation position of the rack 7 is appropriately extended to both sides of the slide seat 3 so that it exceeds the physical boundary of the slide seat 3. Alternatively, the rack 7 can be designed as a single piece, with its physical length exceeding the length of the slide seat 3, and directly installed on the slide seat 3 so that its two ends extend naturally.

[0046] However, when multiple sliding seats 3 are closely arranged or need to move close to each other, the racks 7 extending from adjacent sliding seats 3 may interfere at the same height, thus hindering the smooth movement of the sliding seats 3 and even causing the mechanism to jam.

[0047] As an optional implementation, the racks 7 on two adjacent sliding seats 3 are located at different heights, forming a misaligned structure.

[0048] In this embodiment, the rack 7 being at different heights means that the rack 7 used to mesh with the drive gear 6 on two adjacent sliding seats 3 have different installation positions in the vertical direction. For example, the rack 7 on one sliding seat 3 can be installed at a relatively low position, while the rack 7 on its adjacent sliding seat 3 is installed at a relatively high position. This difference in height ensures that even when the sliding seats 3 are closely arranged or close to each other, the extended rack 7 will not physically collide or interfere with each other on the same horizontal plane.

[0049] Different mounting slots or bosses can be designed on the sliding seat 3 to create a natural height difference in the rack 7 during assembly; or the vertical position of the rack 7 can be adjusted by adding shims or brackets of different thicknesses between the rack 7 and the sliding seat 3.

[0050] For example, the rack 7 on the first sliding seat 3 is installed at a height of millimeters from the surface of the guide rail 4, while the rack 7 on the second sliding seat 3 is installed at a height of millimeters from the surface of the guide rail 4. The rack 7 on the third sliding seat 3 is again installed at a height of millimeters, and so on. To achieve this height difference, mounting grooves of different depths can be machined on the side of the sliding seat 3, or pads of different thicknesses can be welded to the back of the rack 7, so that a preset height difference is naturally formed when it is installed on the sliding seat 3. The drive gear 6 can be designed to have sufficient axial width, or through the vertical adjustment capability of the drive component 5, it can reliably mesh with the racks 7 of different heights. When the sliding seat 3 moves on the guide rail 4, even if the extended racks 7 of adjacent sliding seats 3 overlap in the horizontal direction, they will not collide due to their misalignment in the vertical direction, thus ensuring the free movement of the sliding seat 3.

[0051] As an optional implementation, the clamping mechanism includes: Telescopic drive component 85 is disposed on positioning seat 2 and sliding seat 3, and the telescopic end of telescopic drive component 85 extends into the clamping area; The fixing component is located at the telescopic end of the telescopic drive component 85 and is used to clamp and fix the pipe fitting to be welded.

[0052] In this embodiment, the telescopic drive 85 is a drive device capable of adjusting length or position. Its core function is to provide controllable telescopic movement, thereby changing the position of its end component. For example, a cylinder or hydraulic cylinder can be used as the telescopic drive 85. By controlling the air pressure or hydraulic pressure, the piston rod extends or retracts, thereby driving the connected component to perform linear movement. Alternatively, an electric push rod can be used as the telescopic drive 85. The electric push rod drives the lead screw and nut mechanism through a motor to convert rotational motion into linear motion, thereby realizing the telescopic function. The role of the telescopic drive 85 here is to enable the clamping mechanism to actively extend into or retract into the clamping area to adapt to pipes of different sizes or shapes to be welded, and to provide an adjustable support position for the subsequent fixing components.

[0053] The fixing component is a device used to physically clamp and fix the pipe fitting to be welded. Its purpose is to provide a stable and reliable clamping force after the telescopic drive 85 has roughly positioned the pipe fitting, ensuring that the position of the pipe fitting remains unchanged during processing. For example, the fixing component can be composed of a pair of jaws that move relative to each other under the action of driving force through a mechanical linkage mechanism, thereby clamping the pipe fitting. Alternatively, the fixing component can also be a clamp with elastic deformation capability, such as a spring clamp, which clamps the pipe fitting through preload or externally applied force. The fixing component ensures that the pipe fitting to be welded can be firmly fixed after being sent into the clamping area by the telescopic drive 85, preventing displacement or shaking during subsequent welding or adjustment, thereby ensuring welding accuracy.

[0054] When it is necessary to clamp the pipe fitting to be welded, the telescopic drive component 85 will accurately deliver the fixing component to the appropriate position in the clamping area according to the size and shape of the pipe fitting. Subsequently, the fixing component set at the telescopic end of the telescopic drive component 85 will clamp and fix the pipe fitting to be welded, so that the clamping mechanism can actively adapt to pipe fittings of different sizes and shapes. Through the precise delivery of the telescopic drive component 85, it is ensured that the fixing component can clamp the pipe fitting to be welded in the best posture and position. Through the synergistic effect of the telescopic drive component 85 and the fixing component, not only is the flexibility and adaptability of clamping improved, but also after the pipe fitting is delivered into the clamping area, the fixing component can provide a stable and reliable clamping force, thereby effectively avoiding errors caused by inaccurate positioning or unstable fixing of the pipe fitting in subsequent processing, and significantly improving the accuracy and stability of clamping.

[0055] As an optional implementation, the fixing component includes: Two clamping plates 9 are slidably disposed at the end of the telescopic drive 85. The opposite side of the two clamping plates 9 is used to clamp the pipe fitting to be welded. The bidirectional lead screw 10 is rotatably mounted at the end of the telescopic drive component 85. The two threads of the bidirectional lead screw 10 are respectively threaded into the two clamping plates 9.

[0056] In this embodiment, the clamping plate 9 can be made of a variety of materials, such as high-strength steel, aluminum alloy or engineering plastic. Its surface can be customized according to the material and shape of the pipe to be clamped, such as a flat surface, a surface with anti-slip texture, or a contact surface with a specific geometry, in order to improve the clamping effect and protect the surface of the pipe.

[0057] The clamping plate 9 can move relative to the specific guide structure at the telescopic end of the telescopic drive member 85, which can ensure that the clamping plate 9 can smoothly and accurately approach or move away from the center of the pipe when clamping or releasing the pipe. The sliding setting can be implemented in various forms, such as by cooperating with the slider on the clamping plate 9 through the linear guide rail 4 set at the telescopic end of the telescopic drive member 85, or through the dovetail groove structure, T-groove structure, etc., to ensure the stability and positioning accuracy of the movement of the clamping plate 9.

[0058] The bidirectional lead screw 10 is used to synchronously drive the two clamping plates 9 to move symmetrically, thereby achieving centered clamping of the pipe fitting. The bidirectional lead screw 10 can be made of high-strength alloy steel, and its thread accuracy is crucial to the synchronicity and positioning accuracy of clamping. The rotatable setting of the bidirectional lead screw 10 means that it is rotatably mounted at the end of the telescopic drive component 85 through bearings or bushings. This mounting method allows the bidirectional lead screw 10 to rotate freely under the action of the drive mechanism, thereby driving the clamping plates 9 to move.

[0059] The two threads of the double-acting screw 10 engage with the corresponding internal threads or nuts on the two clamping plates 9. When the double-acting screw 10 rotates, because its two threads rotate in opposite directions, the two clamping plates 9 move toward the center or open outward at the same speed, thereby achieving precise centering clamping and release of the pipe fitting.

[0060] Specifically, when the bidirectional lead screw 10 rotates in one direction, the two clamping plates 9 move toward the center at the same speed, thereby applying clamping force to the opposite side of the pipe fitting to be welded, thus fixing the pipe fitting; when the bidirectional lead screw 10 rotates in the other direction, the two clamping plates 9 open outwards simultaneously, releasing the pipe fitting. This design ensures that the pipe fitting to be welded can be automatically centered when clamped, and the clamping force is evenly distributed, effectively avoiding splicing errors caused by pipe fitting eccentricity or unstable clamping, thus providing a stable foundation for subsequent precise welding splicing.

[0061] As an optional implementation, the clamping mechanism also includes a positioning post 14, which is disposed at the end of the telescopic drive member 85 and located between the two clamping plates 9. The positioning post 14 is tapered to be inserted into pipes of different diameters.

[0062] In this embodiment, the positioning column 14 is a component used to assist in the internal centering and support of the pipe fitting. Its main function is to support and guide the pipe fitting from the inside while it is being clamped by the external clamping mechanism, so as to ensure that the axis of the pipe fitting is aligned and to prevent the pipe fitting from deforming during clamping or welding.

[0063] The positioning post 14 can be made of high-strength, wear-resistant metal materials, such as stainless steel, alloy steel or surface-hardened carbon steel, to ensure its stability and durability during use. In addition, the positioning post 14 can also be made of engineering plastics or composite materials to meet the material performance requirements of specific application scenarios, such as reducing weight or avoiding damage to the surface of the pipe fitting.

[0064] The conical positioning post 14 has good guiding properties, allowing it to be easily inserted into the pipe fitting. The conical design also enables the positioning post 14 to adapt to changes in the inner diameter of the pipe fitting within a certain range. That is, by having different diameter portions of the conical surface contact the inner wall of the pipe fitting with different diameters, effective positioning of pipe fittings of different diameters can be achieved. For example, the conical shape can be designed as a single smooth conical surface, or as a structure with multiple stepped conical surfaces, to further improve the adaptability to pipe fittings of different diameters. The purpose of the conical positioning post 14 is to be able to be inserted into the pipe fitting to be welded with different diameters. Through the self-adaptive characteristics of the conical surface, the positioning post 14 can provide internal support and centering for pipe fittings with different inner diameters within a certain range, without the need for frequent replacement of positioning components, thereby improving the versatility and operational efficiency of the tooling.

[0065] As an optional implementation, the clamping surface of the positioning plate is provided with an arc-shaped limiting groove 11.

[0066] In this embodiment, the arc-shaped limiting groove 11 refers to a groove structure formed on the surface of the clamping plate 9, which is a curved arc rather than a straight line or an acute angle. This arc-shaped design can match the shape of a circular or curved pipe fitting, thereby increasing the contact area and providing more stable support and positioning. The limiting groove 11 can be implemented by directly milling, casting, or molding on the clamping surface of the clamping plate 9, or by installing a pad with an arc-shaped groove on the clamping surface. For example, a V-shaped groove or a U-shaped groove can be used, or an arc-shaped groove customized according to the curvature of the pipe fitting to be clamped.

[0067] This ensures that the pipe fittings to be welded can maintain precise position and angle during clamping and subsequent welding processes, and are not prone to displacement even when subjected to external vibration or welding stress, thereby guaranteeing the assembly accuracy and welding quality of irregular parts.

[0068] As an optional implementation, the location acquisition unit includes: Mounting bracket 12 is set on workbench 1; An industrial camera 13 is mounted on the workbench 1. The industrial camera 13 is used to capture the position of the pipe to be welded within the clamping area. The industrial camera 13 is electrically connected to the control unit.

[0069] In this embodiment, the mounting bracket 12 is used to stably support the industrial camera 13, ensuring its stable position on the worktable 1, thereby ensuring the accuracy of the position information collected by the industrial camera 13. The mounting bracket 12 can be designed as an L-shaped bracket, which is fixed to the side or top of the worktable 1 by bolts. Its height and angle are adjustable so that the industrial camera 13 can look down or sideways at the clamping area. In addition, the mounting bracket 12 can also be a gantry structure that spans over the clamping area. The industrial camera 13 is mounted on the gantry by slide rails or fixed seats to achieve full coverage of the clamping area.

[0070] Industrial camera 13 is a digital camera specifically designed for industrial automation and machine vision applications. It features high resolution, high frame rate, and high stability. Industrial camera 13 is used to non-contactly acquire image data of the pipe to be welded within the clamping area and obtain the precise position and orientation information of the pipe through image processing technology. Industrial camera 13 can use a CCD or CMOS sensor, equipped with a suitable lens, and be electrically connected to the control unit through interfaces such as USB, GigE, or CameraLink. It uses machine vision algorithms (such as edge detection, feature matching, etc.) to identify the geometric features of the pipe and calculate its spatial position. Alternatively, industrial camera 13 can also be a 3D vision camera, such as a structured light camera or a binocular stereo camera, which directly acquires the 3D point cloud data of the pipe to be welded by projecting a specific pattern or using the principle of parallax, thereby more accurately determining its spatial position and orientation.

[0071] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A clamping fixture for irregularly shaped parts, comprising: The workbench has openings and a clamping area. The positioning seat is fixedly mounted on the worktable; Multiple sliding seats are slidably disposed on the worktable and can be driven to move around the clamping area; Multiple clamping mechanisms are respectively disposed on the plurality of sliding seats and the positioning seats. The clamping mechanism on the positioning seat is used to clamp one of the pipe fittings to be welded, and the clamping mechanism on the sliding seat is used to clamp and fix the remaining pipe fittings to be welded. The position acquisition unit, set on the workbench, is used to acquire the position of the pipe fitting to be welded; The control unit is electrically connected to the position acquisition unit and is used to receive the position information acquired by the position acquisition unit and to adjust the angle between the sliding seat and the positioning seat so that the pipes to be welded on each set of clamping mechanisms are spliced ​​together at a preset angle.

2. The clamping fixture for irregularly shaped parts as described in claim 1, characterized in that, A ring-shaped guide rail is provided around the clamping area on the worktable, and the sliding seat is slidably disposed on the guide rail.

3. The clamping fixture for irregularly shaped parts as described in claim 2, characterized in that, The workbench is equipped with multiple sets of drive mechanisms for moving the sliding seat, the drive mechanisms including: The driving component is mounted on the worktable; A drive gear is disposed at the drive end of the drive component; A rack is disposed on one side of the sliding seat. The rack is arc-shaped and meshes with the drive gear. The driving component drives the sliding seat to move along the guide rail via the rack and the driving gear.

4. The clamping fixture for irregularly shaped parts as described in claim 3, characterized in that, The arc length of the rack is greater than the length of the slide seat, and both ends of the rack extend beyond the slide seat.

5. A clamping fixture for irregularly shaped parts as described in claim 4, characterized in that, The racks on two adjacent sliding seats are located at different heights, forming a misaligned structure.

6. The clamping fixture for irregularly shaped parts as described in claim 1, characterized in that, The clamping mechanism includes: A telescopic drive component is disposed on the positioning seat and the sliding seat, and the telescopic end of the telescopic drive component extends into the clamping area; A fixing component is provided at the telescopic end of the telescopic drive component and is used to clamp and fix the pipe fitting to be welded.

7. A clamping fixture for irregularly shaped parts as described in claim 6, characterized in that, The fixing component includes: Two clamping plates are slidably disposed at the ends of the telescopic drive component, and the opposite sides of the two clamping plates are used to clamp the pipe fitting to be welded. A bidirectional lead screw is rotatably mounted at the end of the telescopic drive component, and the two threads of the bidirectional lead screw respectively engage with the threads of the two clamping plates.

8. A clamping fixture for irregularly shaped parts as described in claim 7, characterized in that, The clamping mechanism further includes a positioning post, which is disposed at the end of the telescopic drive member and located between the two clamping plates. The positioning post is tapered to be inserted into pipes of different diameters.

9. A clamping fixture for irregularly shaped parts as described in claim 7, characterized in that, The positioning plate has an arc-shaped limiting groove on its clamping surface.

10. A clamping fixture for irregularly shaped parts as described in claim 1, characterized in that, The location acquisition unit includes: A mounting bracket is provided on the workbench; An industrial camera is mounted on the workbench and is used to capture the position of the pipe to be welded within the clamping area. The industrial camera is electrically connected to the control unit.

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