Tailor welding device for movable arm oil pipe of excavator

Abstract

The utility model discloses an excavator movable arm oil pipe tailor-welding device which comprises a bottom plate, a positioning pin, a limiting block, a semicircular cushion block, a quick clamp and a square opening cushion block, the quick clamp, the limiting block, the semicircular cushion block and the square opening cushion block are arranged on the bottom plate, and the positioning pin is installed on the limiting block and used for fixing the end, provided with a connector, of a movable arm oil pipe. The quick clamp is arranged at the joint where the movable arm oil pipes are spliced and used in cooperation with the semicircular cushion block, and the semicircular cushion block and the square opening cushion block are both used for supporting the movable arm oil pipes. The device has the advantages of being accurate in positioning, reliable in supporting, convenient to use, high in tailor-welding efficiency and capable of inspecting the size of a pre-welding bent pipe and a post-welding oil pipe assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of welding assembly devices, and particularly relates to a welding assembly device for the boom oil pipe of an excavator. Background Art

[0002] As the "blood vessels" of construction machinery, hydraulic oil pipes are essential and important parts of construction machinery. The oil pipes are mainly composed of welded parts such as bent pipes, flanges, and joints. Due to the main engine structure, different usage positions, and different functions, the oil pipes are designed and processed into various shapes; among them, the assembly of the hydraulic system of construction machinery has the highest requirements for the spatial dimensions of the oil pipes, which directly affects the product quality of the main engine, and the oil pipes need to bear the pressure of the hydraulic system. The oil pipes need to connect two oil ports or be made into an intermediate hose support. There are spatial dimensions in the shape of the bent pipes, and there are also spatial dimensions when the flanges and joints are spliced with the oil pipes, which results in no reference for the part welding. After these oil pipes are welded, they need to be installed in various positions of the main engine hydraulic system, facing the test of harsh working conditions and high impact vibration. Due to dimensional problems, assembly interference occurs, and the oil pipes are skewed and the seals do not cooperate and leak oil, which will seriously affect the reliability of the main engine. Therefore, the concentricity between the joints and the bent pipes, the spatial dimensions, the accuracy of the dimensions, and the welding reliability during the welding of the oil pipes will be particularly important. Therefore, by designing this welding assembly device, it is ensured that the requirements of the drawing dimensions are met after welding, and the consistency, reliability, and uniformity of the installation of the oil pipes are ensured.

[0003] In the existing patent with the patent number 2018217446278 and the name of the F-type oil pipe welding assembly auxiliary device, the central axis of the groove is perpendicular to the upper surface of the support; a pressing device for pressing the F-type oil pipe is also fixedly connected to the upper surface of the support; the following are several deficiencies of this technology:

[0004] 1. For the F-type oil pipe welding assembly auxiliary device mentioned in the patent, the device is composed of a support, a bracket, a pressing device, a flange fixing plate, and a joint positioning block. The flange fixing plate in this device positions the flange, and the support and the column position the oil pipe. The support has columns on only one side, resulting in a low positioning accuracy for the oil pipe and being only applicable to the welding of some oil pipes with relatively low accuracy requirements;

[0005] 2. From the illustration of the F-type oil pipe welding assembly auxiliary device mentioned in the patent, when this tooling assembles the product, the contact area between the oil pipe and the support is small, resulting in poor guiding performance of the oil pipe;

[0006] In the patent with the patent number 2018219414483 and the name of a welding assembly auxiliary device for pump pipes, a placement groove is fixedly provided in the middle of the top of the placement block, and a first connector, a bent round pipe, and a second connector are sequentially placed on the top of the placement groove. Their flanges are respectively fixedly connected to the mounting holes of the first fixing plate and the mounting holes of the second fixing plate through fixing bolts; the following are several deficiencies of this technology:

[0007] 1. An auxiliary device for butt welding of pump pipes mentioned in the patent. This device is composed of a fixed plate, a cushion block, a hinge, a placement block, a cover plate, etc. The device positions the flange through the fixed plate of the flange, and positions the position of the oil pipe through the cushion block. The round opening of the cushion block is not a complete semi - circle, with poor guiding performance for the oil pipe and poor positioning accuracy for the oil pipe.

[0008] 2. From the illustration of an auxiliary device for butt welding of pump pipes mentioned in the patent, when this tooling is used to butt - weld products, the pressing device is composed of a pressing plate and a hinge, lacking a damping device, resulting in insufficient pressing force of the device to make the oil pipe fit tightly against the cushion block. Utility Model Content

[0009] In view of the problems existing in the above - mentioned prior art, the present utility model provides a boom oil pipe butt - welding device for an excavator, aiming to solve the problems of poor dimensional consistency after the oil pipe is bent, interference in the assembly with the boom after welding, improving the assembly consistency of the boom oil pipes, making the layout of the oil pipes beautiful, and solving the problem of interference in the assembly of some oil pipes; the bent pipe before welding can be repaired using this device, improving the tooling efficiency of spot - welding workers. At the same time, by changing the way of the cushion block size, the structure is simple, the operation is convenient, and the positioning is accurate. This butt - welding device mainly includes aspects of structural design. Structurally, (1) positioning accuracy; (2) support reliability; (3) ease of use; (4) efficiency of butt welding; (5) inspection of the dimensions of the oil pipe assembly before welding and after welding.

[0010] To achieve the above purpose, the technical solution adopted by the present utility model is: a boom oil pipe butt - welding device for an excavator, including: a bottom plate, a positioning pin, a limit block, a semi - circular cushion block, a quick - clamp, and a square - opening cushion block. The quick - clamp, limit block, semi - circular cushion block, and square - opening cushion block are arranged on the bottom plate. The positioning pin is installed on the limit block and is used to fix the end of the boom oil pipe with a joint. The quick - clamp is arranged at the connection of the boom oil pipe splicing and is used in cooperation with the semi - circular cushion block. Both the semi - circular cushion block and the square - opening cushion block are used to support the boom oil pipe.

[0011] Further, there are two limit blocks, which are respectively arranged at both ends of the boom oil pipe. The two ends of the boom oil pipe are fixed on the limit blocks through the positioning pins. There are two square - opening cushion blocks, which are respectively arranged near the limit blocks and are used to support the boom oil pipe near the limit blocks.

[0012] Further, there are three semi - circular cushion blocks.

[0013] Further, the boom oil pipe is divided into three sections. Two of the semi - circular cushion blocks are arranged at the connection of the three - section boom oil pipe, and the other one is arranged at the bending position of the boom oil pipe.

[0014] Further, there are two quick - clamps, and the two quick - clamps are respectively arranged on the sides of the semi - circular cushion blocks at the connection of the boom oil pipe and are used to clamp and press one end of the oil pipe at the connection of the boom oil pipe.

[0015] Furthermore, a semi-circular notch that fits the shape of the boom oil pipe is provided on the semi-circular cushion block for placing the boom oil pipe.

[0016] Furthermore, a square notch is provided on the square orifice cushion block for placing the boom oil pipe to limit it.

[0017] Furthermore, a through hole for installing a positioning pin is provided in the limit block.

[0018] The beneficial effects of the present utility model are as follows:

[0019] (1) The concentricity of the pipe end of the positioning joint is positioned by cooperating the positioning pin and the limit plate, which is convenient for disassembly;

[0020] (2) Semi-circular positioning is adopted, which is convenient for automatic centering and has strong guiding properties;

[0021] (3) After the quick clamp and the semi-circular cushion block cooperate to fit the tooling at one end of the connection of the boom oil pipe, the oil pipe is pressed at one end, and the bending type of the bent pipe is adjusted according to the tooling to ensure the consistency of the size of the bent pipe before welding;

[0022] (4) Using this tooling for butt welding has high efficiency and a high first-pass rate;

[0023] (5) The tooling has a simple structure and is easy to operate, improving efficiency;

[0024] (6) After the oil pipe welding is completed, it can be used as a gage to inspect the size of the oil pipe after welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural view of the present utility model Figure 1 ;

[0026] Figure 2 is a schematic structural view of the present utility model Figure 2 ;

[0027] Figure 3 is a schematic structural view of the semi-circular cushion block;

[0028] Figure 4 is a schematic structural view of the square orifice cushion block;

[0029] In the figure: 1, bottom plate; 2, positioning pin; 3, limit block; 4, semi-circular cushion block; 5, quick clamp; 6, square orifice cushion block; 7, boom oil pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are only for the purpose of describing specific embodiments and are not intended to limit this utility model.

[0032] As Figures 1-4 shown, a welding and splicing device for the boom oil pipe of an excavator includes: a bottom plate 1, a positioning pin 2, a limiting block 3, a semi-circular cushion block 4, a quick clamp 5, and a square-opening cushion block 6. The quick clamp 5, the limiting block 3, the semi-circular cushion block 4, and the square-opening cushion block 6 are arranged on the bottom plate 1. The positioning pin 2 is installed on the limiting block 3 and is used to fix the end of the boom oil pipe 7 with a joint. The quick clamp 5 is arranged at the splicing connection of the boom oil pipe 7 and is used in cooperation with the semi-circular cushion block 4. Both the semi-circular cushion block 4 and the square-opening cushion block 6 are used to support the boom oil pipe 7.

[0033] The shape of the bottom plate 1 is set according to the shape of the boom oil pipe 7.

[0034] Further in this embodiment, there are two limiting blocks 3, which are respectively arranged at both ends of the boom oil pipe 7. The two ends of the boom oil pipe 7 are fixed on the limiting blocks 3 through the positioning pins 2. There are two square-opening cushion blocks 6, which are respectively arranged near the limiting blocks 3 and are used to support the boom oil pipe 7 near the limiting blocks 3.

[0035] Further in this embodiment, there are three semi-circular cushion blocks 4.

[0036] Further in this embodiment, the boom oil pipe 7 is divided into three sections. Two of the semi-circular cushion blocks 4 are arranged at the splicing connection of the three sections of the boom oil pipe 7, and the other one is arranged at the bending position of the boom oil pipe 7.

[0037] Further in this embodiment, there are two quick clamps 5. The two quick clamps 5 are respectively arranged on the sides of the semi-circular cushion blocks 4 at the splicing connection of the boom oil pipe 7 and are used to clamp and press one end of the oil pipe at the splicing connection of the boom oil pipe 7.

[0038] Further in this embodiment, the semi-circular cushion block 4 is provided with a semi-circular notch that fits the shape of the boom oil pipe 7 for placing the boom oil pipe 7.

[0039] Further in this embodiment, the square-opening cushion block 6 is provided with a square notch for placing the boom oil pipe 7 to position it.

[0040] Further in this embodiment, the limiting block 3 is provided with a through hole for installing the positioning pin 2.

[0041] The bottom plate 1 is made of U-shaped 14A channel steel. The bottom plate 1 serves as the reference plane for various positioning blocks and limit blocks 3. After the quick clamp 5 fits the tooling at one end, it presses one end of the oil pipe. According to the tooling, the bending type of the bent pipe is adjusted to ensure the consistency of the dimensions of the bent pipe before welding. The distance between the square opening pad 6 and the limit block 3 mainly ensures the space dimensions of the bent pipe, flange, or joint. The positioning pin 2 and the limit block 3 mainly ensure the concentricity when the joint and the oil pipe are spot-welded, preventing the joint from being skewed during spot welding; ensuring the rapidity and reliability of positioning. At the same time, the limit block 3 and the positioning pin 2 cooperate to ensure that the angular error of the oil pipe is within a reasonable range, having high versatility and reliability.

[0042] The semi-circular pad 4 and the square opening pad 6 are used to limit the space dimensions within a reasonable range; the limit block 3 and the positioning pin 2 are used for positioning and cooperation, and the quick clamp 5 and the semi-circular pad 4 are used to fix the end of the oil pipe. The bending type of the bent pipe can be adjusted according to the tooling, and the loading and unloading are convenient; the semi-circular support has strong guiding performance; the operation is simple, the positioning is accurate, the alignment effect is good, the clamping is rapid, the device structure is simple, and it is not necessary to adjust the positions and dimensions of each device before each use, which has the advantages of convenient use, etc., and solves the problems such as difficult inspection of the dimensions of the welded oil pipe assembly, improves the fitting efficiency and the reliability of the oil pipe product, and improves the inspection efficiency.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, or improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An excavator boom oil pipe welding device, characterized in that: include: A base plate, a positioning pin, a limit block, a semicircular pad, a quick clamp, and a square-mouth pad. The quick clamp, limit block, semicircular pad, and square-mouth pad are arranged on the base plate. The positioning pin is installed on the limit block to fix the end of the boom oil pipe with a joint. The quick clamp is arranged at the joint where the boom oil pipe is spliced ​​and is used in conjunction with the semicircular pad. The semicircular pad and the square-mouth pad are both used to support the boom oil pipe.

2. The excavator boom oil pipe welding device according to claim 1, characterized in that: There are two limit blocks, which are respectively arranged at both ends of the boom oil pipe. The two ends of the boom oil pipe are fixed to the limit blocks by positioning pins. There are two square-mouth pads, which are respectively arranged near the limit blocks and are used to support the boom oil pipe near the limit blocks.

3. The excavator boom oil pipe welding device according to claim 1, characterized in that: There are three semicircular pads.

4. The excavator boom oil pipe welding device according to claim 3 is characterized in that: The boom oil pipe is divided into three sections, two of which are arranged at the connection of the three sections of the boom oil pipe, and the other is arranged at the bending part of the boom oil pipe.

5. The excavator boom oil pipe welding device according to claim 4, characterized in that: The two quick clamps are respectively arranged on the sides of the semicircular pad at the connection of the boom oil pipe and are used to clamp one end of the oil pipe at the connection of the boom oil pipe.

6. The excavator boom oil pipe welding device according to claim 1, characterized in that: The semicircular pad is provided with a semicircular notch which matches the shape of the boom oil pipe and is used for placing the boom oil pipe.

7. The excavator boom oil pipe welding device according to claim 1, characterized in that: The square-mouth pad is provided with a square notch for placing the boom oil pipe and limiting its position.

8. The excavator boom oil pipe welding device according to claim 1, characterized in that: The limit block is provided with a through hole for installing a positioning pin.

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