Automatic adjusting tool and clamping mechanism of pipe welding machine

Abstract

The utility model discloses an automatic adjusting tool and clamping mechanism of a pipe welding machine, and belongs to the technical field of pipe welding machines, the automatic adjusting tool and clamping mechanism comprises a fixing block integrally of a semi-circular structure, a plurality of mounting notches are evenly distributed in the fixing block, the mounting notches are connected with a pressing block through elastic pieces, and the pressing block is provided with a clamping groove. The elastic piece applies force to the pressing block in the radial direction of the fixing block, an arc-shaped recess is formed in the side, close to a center shaft of the fixing block, of the pressing block, the elastic piece applies force to the pressing block close to the center shaft of the fixing block, and the pressing block acts on the outer surface of the steel pipe to be clamped. An elastic mechanism is additionally arranged to compensate for assembly errors caused by tool size errors and steel pipe size errors, self-adaption of the clamping process is completed through the compression stroke existing in the using process, and similar steel pipes of multiple specifications can share one set of tool.

Description

Technical Field

[0001] This application relates to the technical field of pipe welding machines, and particularly to an automatic adjustment tooling and a clamping mechanism for a pipe welding machine. Background Art

[0002] A pipe welding machine is a device specifically used for pipe welding. The pipe welding machine heats both ends of the pipe to a molten state through an electric arc, laser or other heat sources, and then connects them together through pressure. Modern pipe welding machines are usually equipped with an automatic control system, which can realize real-time monitoring and adjustment of the welding process, thereby improving the welding accuracy and consistency.

[0003] Related prior art such as the Chinese patent application "A Steel Pipe Butt Welding Machine", publication number: CN103624458A, discloses that it includes a frame, on which a main shaft that is intermittently rotated by a driving device and is vertically arranged is rotatably connected. A turntable is installed at the top of the main shaft. At least three rotating shafts are rotatably connected to the turntable and are arranged in a spaced-apart and circumferential manner. Driving motors for respectively driving the rotating shafts to rotate are also installed on the turntable. Lower steel pipe clamps are installed at the tops of the rotating shafts. Support frames respectively corresponding to each rotating shaft are also installed on the turntable. Upper positioning cylinders are installed on the support frames. Upper steel pipe clamps are installed on the downward extending piston rods of the upper positioning cylinders. A welding machine and a welding torch fixing seat are also installed on the frame. The welding torch of the welding machine is rotatably connected to the welding torch fixing seat and is driven to rotate by a driving handle. A positioning plate for positioning the angle of the positioning welding torch is also installed on the welding torch fixing seat. It can simplify the clamping process of the product, improve the welding efficiency and welding quality. The appearance quality of the welds of the products produced by the welding machine of the present invention is good, greatly reducing the labor intensity of workers and shortening the welding time of the products.

[0004] The above-mentioned steel pipe butt welding machine clamps the pipe to be welded through the action of the lower steel pipe clamp and the upper steel pipe clamp, and can realize automatic welding between two steel pipes in cooperation with the welding torch. Therefore, if a high-quality welding effect is required, the movement trajectory of the welding torch needs to completely coincide with the joint path of the steel pipe. Therefore, it is necessary to have a high precision in the clamping and fixing of the steel pipe to ensure the coaxial alignment of the steel pipe with the steel pipe.

[0005] Currently, corresponding welding toolings are custom-processed according to different pipe diameters for clamping. Conventional pipe welding toolings can only clamp and fix steel pipes of one specification. If the outer diameter of the steel pipe is a little smaller than the inner diameter of the tooling, tin foil needs to be used for error filling, which is complex and inefficient in operation. Moreover, due to processing errors, as well as the pipe diameter tolerance and out-of-roundness tolerance of the steel pipe itself, the steel pipe will tilt or cannot be clamped during the clamping and fixing process. Utility Model Content

[0006] The technical problem to be solved by this application is to provide an automatic adjustment tooling and a clamping mechanism for a pipe welding machine, adding an elastic mechanism to compensate for the assembly errors caused by the tooling size error and the steel pipe size error, and completing the self - adaptation of the clamping process during use with the compression stroke, so that a set of tooling can be commonly used for multiple similar specifications of steel pipes.

[0007] The technical solution adopted in this application is as follows: An automatic adjustment tooling for a pipe welding machine includes a fixed block with an overall semi - circular ring structure. A plurality of mounting slots are evenly distributed on the fixed block. The mounting slots are connected to a pressing block through elastic members. The elastic members apply a force to the pressing block along the radial direction of the fixed block. An arc - shaped depression is provided on the side of the pressing block close to the central axis of the fixed block. The elastic member applies a force to the pressing block close to the central axis of the fixed block, and the pressing block acts on the outer surface of the steel pipe to be clamped.

[0008] Compared with the prior art, the advantages of this application are as follows: In order to compensate for the assembly errors caused by the tooling size error and the steel pipe size error, this application adopts a fixed block with a semi - circular ring structure, which can well adapt to the steel pipe structure and wrap the outer circumference of the steel pipe. A plurality of mounting slots are evenly distributed on the fixed block, and each mounting slot is connected to a pressing block through an elastic member. The elastic member applies a force to the pressing block along the radial direction of the fixed block. In this application, by adding an elastic member and the pressing block connected to the elastic member, the pressing block acts on the outer surface of the steel pipe to be clamped. During the use of the tooling, there is a compression stroke, and a set of tooling can be commonly used for multiple similar specifications of steel pipes. The elastic member applies a force to the pressing block close to the central axis of the fixed block, and the self - adaptation of the clamping process is completed through the deformation of the elastic member. This application fully considers in the structural design that the tooling should be simple, reliable, long - lasting, and convenient to use, effectively improving the efficiency and reliability of the welding work.

[0009] In some embodiments of this application, the fixed block includes an inner side surface close to its central axis and an outer side surface far from its central axis. The mounting slots penetrate the inner side surface and the outer side surface of the mounting slots along the radial direction of the fixed block.

[0010] In some embodiments of this application, the pressing block is installed on the side where the inner side surface of the fixed block is located, and the arc - shaped depression of the mounting block is adapted to the outer surface of the steel pipe. In this application, the tooling has an optimal matching steel pipe outer diameter. When clamping a steel pipe with this outer diameter, the arc - shaped depression of the mounting block can fit the outer surface of the steel pipe. Of course, this application can also be used for clamping and limiting steel pipes with an outer diameter within a certain difference range.

[0011] In some embodiments of this application, the elastic member is a spring. One end of the spring is installed at the mounting slot, and the other end of the spring acts on the pressing block. The spring is arranged along the radial direction of the fixed block, and the spring is in a compressed state.

[0012] In the present application, the elastic member adopts a linear spring, which acts on the pressure block to drive the pressure block to approach the central axis of the fixed block along the axial direction of the fixed block. The present application uses an elastic structure to clamp the steel pipe, and the elastic structure will shrink due to pressure, thereby achieving self-adaptation to the size of the steel pipe and reducing the tolerance requirements on the size of the steel pipe parts and the size of the clamping tooling.

[0013] In some embodiments of the present application, the pressing block is connected to the mounting slot via a guide assembly, and the guide assembly includes a push rod and a bolt, and the push rod and the bolt are connected to form an I-shaped structure.

[0014] In some embodiments of the present application, the push rod is in a T-shaped structure, and the push rod includes an end and a rod portion. The end portion is located on the side where the outer surface of the fixed block is located, and the diameter of the end portion is larger than the diameter of the mounting slot. One end of the rod portion is connected to the end portion, and the other end of the rod portion passes through the mounting slot and is connected to the pressing block.

[0015] By setting a push rod, the rod portion of the push rod limits the radial motion trajectory of the pressing block, ensuring that the pressing block moves along the radial direction of the fixed block. The end of the push rod limits the movement limit of the pressing block, and the pressing block will not fall out of the mounting notch of the fixed block, but will be reliably mounted on the fixed block.

[0016] In some embodiments of the present application, a threaded hole is provided at the other end of the rod, a bolt is embedded in the pressing block, and the screw of the bolt passes through the pressing block and is threadedly connected to the threaded hole. Thus, the guide assembly in the present application realizes the movable installation of the pressing block and the installation slot.

[0017] In some embodiments of the present application, the spring sleeve is arranged outside the rod portion of the push rod, that is, the spring is also limited by the push rod, ensuring that the force applied by the spring to the pressure block is along the radial motion trajectory.

[0018] In some embodiments of the present application, a guide sleeve is installed on the inner wall surface of the installation slot, the push rod passes through the guide sleeve, and the inner diameter of the guide sleeve is adapted to the rod diameter of the push rod.

[0019] Specifically, the guide sleeve of the present application is tightly fitted with the installation slot, and the design of the guide sleeve can effectively reduce the friction component when the guide component moves relative to the installation slot, and also effectively prolong the service life of each component. The guide sleeve also serves to limit the moving trajectory of the ejector rod.

[0020] A clamping mechanism of a pipe welding machine includes two left and right clamping assemblies. The clamping assemblies include two symmetrically arranged automatic adjustment tools. The two automatic adjustment tools clamp one steel pipe respectively. In the clamping state, the two automatic adjustment tools form a circular ring structure to wrap the steel pipe.

[0021] On the basis of conforming to the common knowledge in the art, the above embodiments can be combined arbitrarily. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Hereinafter, the present application will be further described in detail with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be used to limit the scope of the present application. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0023] Figure 1 is a schematic structural diagram of the automatic adjustment tooling in the present application;

[0024] Figure 2 is an exploded structural diagram of the automatic adjustment tooling in the present application;

[0025] Figure 3 is a schematic structural diagram of the clamping mechanism in the working state in the present application;

[0026] Figure 4 A cross-sectional view of the clamping mechanism in the present application.

[0027] Among them, the specific descriptions of the reference numerals are as follows: 1, steel pipe; 3, fixed block; 4, installation notch; 5, elastic member; 6, pressing block; 7, arc-shaped depression; 8, threaded hole; 9, guide sleeve; 10, guiding assembly; 11, ejector rod; 11a, rod part; 11b, end part; 12, bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will describe the present application in detail with reference to the accompanying drawings.

[0029] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] An automatic adjustment tooling for a pipe welding machine, as in Embodiment 1 Figures 1 to 2As shown in the figure: It includes a fixing block 3 with an overall semi-circular ring structure. In this application, the fixing block 3 with a semi-circular ring structure is adopted, which can well adapt to the structure of the steel pipe 1 and wrap the outer peripheral surface of the steel pipe 1. A plurality of mounting notches 4 are evenly distributed on the fixing block 3. The mounting notches 4 are connected to a pressing block 6 through an elastic member 5. During the use of the tooling, the elastic member 5 with a compression stroke applies a force along the radial direction of the fixing block 3 to the pressing block 6. In this application, by adding an elastic member 5 and a pressing block 6 connected to the elastic member 5, the pressing block 6 acts on the outer surface of the steel pipe 1 to be clamped. In this way, a set of tooling can be commonly used for multiple steel pipes 1 with similar specifications. An arc-shaped depression 7 is provided on one side of the pressing block 6 close to the central axis of the fixing block 3. The elastic member 5 applies a force to the pressing block 6 close to the central axis of the fixing block 3, and the pressing block 6 acts on the outer surface of the steel pipe 1 to be clamped. The self-adaptation of the clamping process is completed through the deformation of the elastic member 5. In the structural design of this application, full consideration is given to the simplicity, reliability, long service life, and convenient use of the tooling, effectively improving the efficiency and reliability of the welding work.

[0031] Embodiment 2, as Figures 1 to 2 shown, the fixing block 3 includes an inner side surface close to its central axis and an outer side surface far from its central axis. The mounting notch 4 runs through the inner side surface and the outer side surface of the mounting notch 4 along the radial direction of the fixing block 3.

[0032] The pressing block 6 is installed on the side where the inner side surface of the fixing block 3 is located. The arc-shaped depression 7 of the mounting block is adapted to the outer surface of the steel pipe 1. In this application, the tooling has an optimal matching outer diameter of the steel pipe 1. When clamping the steel pipe 1 with this outer diameter, the arc-shaped depression 7 of the mounting block can fit the outer surface of the steel pipe 1. Of course, this application can also be used to clamp and limit the steel pipe 1 with an outer diameter within a certain difference range.

[0033] The elastic member 5 is a spring. One end of the spring is installed at the mounting notch 4, and the other end of the spring acts on the pressing block 6. The spring is arranged along the radial direction of the fixing block 3 and is in a compressed state. In this application, the elastic member 5 adopts a linear spring, and the spring acts on the pressing block 6 to drive the pressing block 6 to approach the central axis of the fixing block 3 along the axial direction of the fixing block 3. In this application, the clamping of the steel pipe 1 is realized through an elastic structure. The elastic structure will shrink due to compression, thereby realizing the self-adaptation to the size of the steel pipe 1 and reducing the tolerance requirements for the part size of the steel pipe 1 and the size of the clamping tooling.

[0034] The pressing block 6 is connected to the mounting notch 4 through a guiding component 10. The guiding component 10 includes a top rod 11 and a bolt 12, and the top rod 11 and the bolt 12 are connected into an I-shaped structure.

[0035] The push rod 11 is a T-shaped structure, and includes an end 11b and a rod 11a. The end 11b is located on the side where the outer side of the fixed block 3 is located. The diameter of the end 11b is larger than the diameter of the installation slot 4. One end of the rod 11a is connected to the end 11b, and the other end of the rod 11a passes through the installation slot 4 and is connected to the pressure block 6. By setting the push rod 11, the rod 11a of the push rod 11 is used to limit the radial movement trajectory of the pressure block 6, ensuring that the pressure block 6 moves along the radial direction of the fixed block 3. The end 11b of the push rod 11 is used to limit the movement limit of the pressure block 6, and the pressure block 6 will not be separated from the installation slot 4 of the fixed block 3, but is reliably installed on the fixed block 3.

[0036] The other end of the rod 11a is provided with a threaded hole 8, a bolt 12 is embedded in the pressing block 6, and the screw of the bolt 12 passes through the pressing block 6 and is threadedly connected to the threaded hole 8. Thus, the guide assembly 10 in the present application realizes the movable installation of the pressing block 6 and the installation slot 4.

[0037] The spring sleeve is arranged outside the rod portion 11a of the push rod 11. That is, the spring is also limited by the push rod 11, ensuring that the force applied by the spring to the pressing block 6 is along the radial motion trajectory.

[0038] A guide sleeve 9 is installed on the inner wall surface of the installation slot 4, and the guide sleeve 9 passes through the push rod 11. The inner diameter of the guide sleeve 9 is adapted to the diameter of the rod portion 11a of the push rod 11. Specifically, the guide sleeve 9 of the present application is tightly fitted with the installation slot 4. The design of the guide sleeve 9 can effectively reduce the friction component when the guide component 10 moves relative to the installation slot 4, and also effectively prolongs the service life of each component. The guide sleeve 9 also serves to limit the moving trajectory of the push rod 11.

[0039] The rest of the content of the second embodiment is the same as that of the first embodiment.

[0040] A clamping mechanism for a pipe welding machine, embodiment 3, as Figures 3 to 4 As shown, it includes two groups of left and right clamping components, and the clamping components include two symmetrically arranged automatic adjusting tools as shown in Example 1 or Example 2. The two automatic adjusting tools correspondingly clamp a steel pipe 1. In the clamping state, the two automatic adjusting tools form a circular structure to wrap the steel pipe 1 inside.

[0041] The present application is described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. An automatic adjustment tooling for a pipe welding machine, characterized in that It includes a fixed block (3) with an overall semi-circular ring structure. A plurality of mounting notches (4) are evenly distributed on the fixed block (3). The mounting notches (4) are connected to a pressing block (6) through elastic members (5). The elastic members (5) apply a force to the pressing block (6) along the radial direction of the fixed block (3). An arc-shaped recess (7) is provided on one side of the pressing block (6) close to the central axis of the fixed block (3). The elastic members (5) apply a force to the pressing block (6) close to the central axis of the fixed block (3), and the pressing block (6) acts on the outer surface of the steel pipe (1) to be clamped.

2. The automatic adjustment tooling for a pipe welding machine according to claim 1, wherein, The fixed block (3) includes an inner side surface close to its central axis and an outer side surface far from its central axis. The mounting notches (4) penetrate through the inner side surface and the outer side surface of the mounting notches (4) along the radial direction of the fixed block (3).

3. The automatic adjustment tooling of a pipe welding machine according to claim 1, characterized in that, The pressing block (6) is installed on the side where the inner side surface of the fixed block (3) is located. The arc-shaped recess (7) of the mounting block is adapted to the outer surface of the steel pipe (1).

4. The automatic adjustment tooling of a pipe welding machine according to claim 1, characterized in that, The elastic member (5) is a spring. One end of the spring is installed at the mounting notch (4), and the other end of the spring acts on the pressing block (6). The spring is arranged along the radial direction of the fixed block (3) and is in a compressed state.

5. The automatic adjustment tooling for a pipe welding machine according to claim 1, characterized in that, The pressing block (6) is connected to the mounting notch (4) through a guiding assembly (10). The guiding assembly (10) includes a top rod (11) and a bolt (12), and the top rod (11) and the bolt (12) are connected into an I-shaped structure.

6. The automatic adjustment tooling of a pipe welding machine according to claim 5, characterized in that, The top rod (11) has a T-shaped structure. The top rod (11) includes an end portion (11b) and a rod portion (11a). The end portion (11b) is located on the side where the outer side surface of the fixed block (3) is located, and the diameter of the end portion (11b) is larger than the diameter of the mounting notch (4). One end of the rod portion (11a) is connected to the end portion (11b), and the other end of the rod portion (11a) passes through the mounting notch (4) and is connected to the pressing block (6).

7. The automatic adjustment tooling of a pipe welding machine according to claim 6, characterized in that, A threaded hole (8) is provided at the other end of the rod portion (11a). The bolt (12) is embedded in the pressing block (6), and the screw rod of the bolt (12) passes through the pressing block (6) and is threadedly connected to the threaded hole (8).

8. An automatic adjustment tooling for a pipe welding machine according to claim 4, characterized in that, The spring is sleeved outside the rod portion (11a) of the top rod (11).

9. The automatic adjustment tooling of a pipe welding machine according to claim 5, characterized in that A guide sleeve (9) is installed at the inner wall surface of the mounting notch (4). The top rod (11) passes through the guide sleeve (9), and the inner diameter of the guide sleeve (9) is adapted to the diameter of the rod portion (11a) of the top rod (11).

10. A clamping mechanism of a pipe welding machine, characterized in that, It includes two sets of clamping assemblies on the left and right. Each clamping assembly includes two symmetrically arranged automatic adjustment tools as described in any one of claims 1-9. The two automatic adjustment tools correspondingly clamp a steel pipe (1). In the clamped state, the two automatic adjustment tools form a circular ring structure to wrap the steel pipe (1) inside.

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