A jib cylinder piston rod welding-through equipment and method

Abstract

The application discloses a kind of arm cylinder piston rod welding equipment and method in the field of piston rod processing equipment, comprising: workbench, installation has slide rail, core pipe feeding device, for moving the core pipe to the core pipe area, rod body feeding device, for moving the rod body to the rod body area, core pipe positioning tool, for positioning the ear ring of the tail end of the core pipe;Core pipe adjusting device is used for adjusting the position of core pipe and guiding into the rod body;Rod body positioning tool is used for positioning the head end of the rod body;Rod body adjusting device is used for adjusting the position of the rod body;Control unit, including controller.The application provides piston rod welding equipment, controls each tool on the equipment by control unit, realizes automatic feeding, core pipe guiding, improves core pipe guiding efficiency, improves operation efficiency and stability, reduces rework repair product, improves the pass rate.

Description

Technical Field

[0001] This invention relates to the field of piston rod processing equipment, and more particularly to a welding device and method for piston rods of extension cylinders. Background Technology

[0002] In the field of through-welding assembly of hydraulic cylinder piston rod core tubes and rod bodies, existing technologies still mainly rely on traditional manual operation. Key processes such as core tube insertion and weld fixation depend on manual operation, with a single piston rod through-welding production cycle of up to 45 minutes, and labor costs accounting for over 35%. This addresses the problems of low automation, insufficient assembly positioning accuracy, and unstable welding quality in existing technologies. Summary of the Invention

[0003] The purpose of this invention is to provide a welding device and method for piston rods of extension boom cylinders, which automates material feeding and core tube insertion, thereby improving assembly accuracy and work efficiency.

[0004] To solve the above technical problems, the following technical solution is adopted: In a first aspect, the present invention provides a welding device for the piston rod of an extension boom cylinder, comprising: The workbench is equipped with slide rails and includes a rod body area and a core tube area. The rod body is installed in the rod body area and the core tube is installed in the core tube area. A core tube feeding device for moving the core tube to the core tube area includes a first telescopic fork arm and a first elevator, wherein the first telescopic fork arm is installed at the output end of the first elevator. A rod feeding device for moving the rod to the rod area includes a second telescopic fork arm and a second elevator, wherein the second telescopic fork arm is installed at the output end of the second elevator. A core tube positioning fixture is slidably mounted on a slide rail at the tail end of the core tube area for positioning the earring at the tail end of the core tube; The core tube adjustment device is slidably mounted on the slide rail in the core tube area and is used to adjust the position of the core tube and guide the core tube into the rod body; A rod positioning fixture is installed at the head end of the rod area to position the head end of the rod. A rod adjustment device is slidably mounted on a slide rail in the rod area for adjusting the position of the rod; The control unit includes a controller, which is electrically connected to the core tube feeding device, the rod feeding device, the core tube positioning fixture, the core tube adjusting device, and the rod adjusting device.

[0005] Optionally, the core tube positioning fixture is slidably mounted on the slide rail via a first servo slide plate, and the ear loop of the core tube is mounted on the core tube positioning fixture; The core tube positioning fixture includes a support plate, a top-pressing cylinder, and a cylinder bracket. The support plate is mounted on the first servo slide plate, and the earring on the core tube is placed on the support plate. The top-pressing cylinder is mounted on the first servo slide plate through the cylinder bracket. The output end of the top-pressing cylinder faces the end face of the earring. After the core tube is introduced into the rod body, the output end of the top-pressing cylinder extends out and presses against the end face of the earring. The rod positioning fixture is equipped with a pressure sensor, which is used to detect the clamping force applied by the top pressure cylinder; The core tube adjustment device includes a core tube bracket and a core tube inlet fixture. The core tube bracket is mounted on the slide rail via a second servo slide plate, and the core tube inlet fixture is mounted on the slide rail via a third servo slide plate. The first servo slide and the second servo slide move synchronously on the slide rail to guide the core tube into the rod body; At least two core tube brackets are provided. The core tube brackets and the core tube inlet fixture are arranged at intervals in the core tube area. The core tube brackets are located between the core tube inlet fixture and the core tube positioning fixture.

[0006] Optionally, the core tube bracket includes a support plate, a partition positioning frame, a first lifting slide, and a second lifting slide; The first lifting slide is vertically mounted on the first servo slide plate, and the second lifting slide is mounted on the slider of the first lifting slide. The tray is installed on the fixed end of the second lifting slide, and the partition positioning frame is installed on the slider of the second lifting slide. The height of the first lifting slide is adjusted by adjusting the height of the second lifting slide, and the height of the partition positioning frame is adjusted by the second lifting slide. Both the partition positioning frame and the tray are equipped with proximity switches; During the process of introducing the core tube into the rod, when the proximity switch on the partition positioning frame detects the partition on the core tube, the first and second lifting slides drive the first support plate and the partition positioning frame to descend together. When the proximity switch on the first support plate detects that the partition on the core tube has passed the first support plate, the first lifting slide drives the first support plate to rise. The first support plate supports the core tube, and the first support plate swings up and down through the first lifting slide, with a swing stroke of 2-20mm.

[0007] Optionally, the core tube insertion fixture includes a second support plate, a connecting plate, and a third lifting slide. The third lifting slide is vertically mounted on a third servo slide plate. The second support plate is mounted on the slider of the third lifting slide via the connecting plate. The core tube is placed on the second support plate, and the height of the second support plate is adjusted via the third lifting slide. The second pallet is equipped with a proximity switch. When the proximity switch detects the partition on the core tube, the third lifting slide moves the second pallet downward.

[0008] Optionally, the rod positioning fixture includes a mounting base and a sleeve. The mounting base is detachably mounted on the head end of the workbench. One end of the sleeve is mounted on the mounting base, and the other end is an open structure aligned with the rod. The head end of the rod extends into the sleeve. The rod adjustment device includes a rod bracket, a height adjustment fixture, and a clamping fixture, wherein there is at least one rod bracket; The rod bracket is mounted on the slide rail via the fourth servo slide plate, the height adjustment fixture is mounted on the slide rail via the fifth servo slide plate, and the clamping fixture is mounted on the slide rail via the sixth servo slide plate.

[0009] Optionally, the clamping and positioning fixture includes two clamping plates and a clamping plate slide. The clamping plate slide is mounted on the sixth servo slide, and the two clamping plates are respectively mounted on two sliders on the clamping plate slide. The two clamping plates clamp the rod body, and after the core tube is fully inserted into the rod body, the two clamping plates open and detach from the rod body.

[0010] Optionally, the rod bracket includes a horizontal slide, rollers, and a telescopic cylinder; A telescopic cylinder is vertically mounted on the fourth servo slide plate. The output end of the telescopic cylinder is connected to the bottom of the horizontal slide table. Two sliders are provided on the horizontal slide table, and two rollers are rotatably mounted on the two sliders respectively. The rod is positioned between two rollers. The distance between the two rollers is adjusted by a horizontal slide to accommodate rods of different specifications. The vertical height of the rollers is adjusted by a telescopic cylinder.

[0011] Optionally, the height adjustment fixture includes a rod support plate and a telescopic cylinder II. The telescopic cylinder II is vertically mounted on the fifth servo slide plate. The output end of the telescopic cylinder II is connected to the bottom of the rod support plate. The rod is placed on the rod support plate, and the height of the rod support plate in the vertical direction is adjusted by the telescopic cylinder II.

[0012] Optionally, at least two core tube feeding devices are provided, arranged at intervals on the side of the workbench. The core tube feeding device also includes a core tube rack, sliding wheels, and guide rails. The first elevator is installed on the lower layer of the core tube rack, and the output end of the first elevator is connected to the bottom of the first telescopic fork arm, driving the first telescopic fork arm to move vertically. Several sliding wheels are installed at the bottom of the core tube rack, and the sliding wheels cooperate with the guide rails on the ground. The core tube rack is used to place core tubes. At least two rod feeding devices are provided, spaced apart on the sides of the workbench. Each rod feeding device also includes a rod rack. A second lifting mechanism is installed on the lower layer of the rod rack, and its output end is connected to the bottom of a second telescopic fork arm, driving the second telescopic fork arm to move vertically. The rod rack is used to hold the rods. The core tube feeding device and the rod feeding device are respectively arranged on opposite sides of the workbench.

[0013] In a second aspect, the present invention provides a method for welding the piston rod of a boom extension cylinder, which is implemented using the welding equipment for the piston rod of a boom extension cylinder described in the first aspect, and includes the following steps: The core tube is hoisted onto the first telescopic fork arm of the core tube feeding device. The first telescopic fork arm moves the core tube above the core tube area. The height of the first telescopic fork arm is adjusted by the first elevator so that the core tube is positioned on the core tube adjustment device and the core tube positioning fixture. The first telescopic fork arm then returns to its original position. At the same time, the rod is hoisted onto the second telescopic fork arm of the rod feeding device. The second telescopic fork arm moves the rod to the top of the rod area. The height of the second telescopic fork arm is adjusted by the second elevator so that the rod is located on the rod adjustment device. The second telescopic fork arm then returns to its original position. Then, the rod head is moved to the rod positioning fixture by the rod adjustment device to determine the rod position; The position of the core tube is adjusted by the core tube adjustment device so that the axis of the core tube is at the same height as the axis of the rod. The core tube is introduced into the rod body through the core tube adjustment device, with the head and tail ends of the core tube extending out from both ends of the rod body, respectively. The core tube is pressed and positioned within the rod body using a core tube positioning fixture; Welding is performed at both ends of the core tube and the rod to fix the core tube and the rod in place.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. The piston rod welding equipment for extension boom cylinders provided by this invention uses a core tube feeding device and a rod feeding device to feed the core tube and rod body onto the worktable. A rod positioning fixture and a rod adjustment device are installed on the rod body area of ​​the worktable to adjust the rod body, ensuring its fixed position and preventing displacement during core tube insertion. The core tube positioning fixture and core tube adjustment device on the core tube area adjust the core tube, driving it to move towards the rod body area and inserting it into the rod body. This invention provides piston rod welding equipment that uses a control unit to control various fixtures on the equipment, achieving automated feeding and core tube insertion, improving core tube insertion efficiency, increasing operational efficiency and stability, reducing rework and repair products, and improving the pass rate.

[0015] 2. The extension arm cylinder piston rod welding equipment provided by this invention includes a core tube bracket to adjust the height of the core tube and a rod bracket to adjust the height of the rod, ensuring the coaxiality of the core tube and the rod. During core tube introduction, the servo slide plates on the core tube bracket and the core tube positioning fixture move synchronously to guide the core tube into the rod. The support plate on the core tube bracket swings up and down to guide the core tube in. The core tube bracket and the core tube introduction fixture are equipped with proximity switches to avoid the partitions on the core tube. The core tube positioning fixture is equipped with a top-pressing cylinder to press the core tube tightly into the rod, ensuring the stability of the weld point. The rod positioning fixture is equipped with a pressure sensor to ensure appropriate pressing force. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the device in an embodiment of the present invention; Figure 2 This is a top view of the device in an embodiment of the present invention; Figure 3 This is a schematic diagram of the core tube feeding device in an embodiment of the present invention; Figure 4 This is a schematic diagram of the rod feeding device in an embodiment of the present invention; Figure 5 This is a schematic diagram of the core tube positioning fixture structure in an embodiment of the present invention; Figure 6 This is one of the schematic diagrams of the core tube bracket structure in the embodiments of the present invention; Figure 7 This is the second schematic diagram of the core tube bracket structure in the embodiments of the present invention; Figure 8 This is a schematic diagram of the core tube introduction tooling structure in an embodiment of the present invention; Figure 9 This is a schematic diagram of the rod positioning fixture structure in an embodiment of the present invention; Figure 10 This is one of the schematic diagrams of the rod bracket structure in the embodiments of the present invention; Figure 11 This is the second schematic diagram of the rod bracket structure in the embodiment of the present invention; Figure 12 This is a schematic diagram of the height adjustment fixture structure in an embodiment of the present invention; Figure 13 This is a schematic diagram of the clamping fixture structure in an embodiment of the present invention; Figure 14 This is a schematic diagram of the piston rod structure in an embodiment of the present invention; Figure 15 This is a schematic diagram of the core tube structure in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Workbench; 101. Core tube area; 102. Rod body area; 103. Upper slide rail; 104. Lower slide rail; 105. Electrical control cabinet; 2. Core tube feeding device; 201. First telescopic fork arm; 202. First elevator; 203. Core tube rack; 204. Pulley; 205. Guide rail; 3. Pole feeding device; 301. Second telescopic fork arm; 302. Second elevator; 303. Pole material rack; 4. Core tube positioning fixture; 401. First servo slide plate; 402. Top pressure cylinder; 403. Cylinder bracket; 404. Support plate; 5. Core tube bracket; 501. Second servo slide plate; 502. Tray 1; 503. Partition positioning frame; 504. First lifting slide; 505. Second lifting slide; 6. Core tube insertion fixture; 601. Third servo slide plate; 602. Second support plate; 603. Third lifting slide; 604. Connecting plate; 7. Rod positioning fixture; 701. Mounting base; 702. Sleeve; 8. Rod bracket; 801. Fourth servo slide plate; 802. Horizontal slide table; 803. Roller; 804. Telescopic cylinder one; 9. Height adjustment fixture; 901. Fifth servo slide plate; 902. Rod support plate; 903. Telescopic cylinder II; 10. Clamping fixture; 1001. Sixth servo slide plate; 1002. Clamping plate; 1003. Clamping plate slide table; 11. Core tube; 1101. Earring; 12. Rod. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] Example 1

[0021] This embodiment provides a welding device for the piston rod of an extension boom cylinder, including a worktable 1, a core tube feeding device 2, a rod feeding device 3, a core tube positioning fixture 4, a core tube adjusting device, a rod positioning fixture 7, a rod adjusting device, and a control unit. The control unit includes a controller, which is electrically connected to the core tube feeding device 2, the rod feeding device 3, the core tube positioning fixture 4, the core tube adjusting device, and the rod adjusting device. The controller controls the core tube feeding device 2 to transport the core tube to the core tube positioning fixture 4 and the core tube adjusting device, controls the rod feeding device 3 to transport the rod 12 to the rod adjusting device, controls the core tube positioning fixture 4 and the core tube adjusting device to move on the worktable 1 to guide the core tube 11 into the rod 12, and controls the rod adjusting device to insert the head end of the rod 12 into the rod positioning fixture 7.

[0022] like Figure 1 , Figure 2 As shown, the workbench 1 has a long body structure and is equipped with slide rails. The workbench 1 is divided into a rod body area 102 and a core tube area 101. The core tube positioning fixture 4 and the core tube adjustment device are installed alternately on the core tube area 101, and the rod body positioning fixture 7 and the rod body adjustment device are installed alternately on the rod body area 102.

[0023] like Figure 14 , Figure 15As shown, the core tube 11 has a rod head at the head end and an earring 1101 at the tail end. Several partitions are provided in the middle. The rod body 12 is a hollow cylindrical structure with open ends. After the core tube 11 and the rod body 12 are installed together, the partitions in the middle support the core tube 11 at the center position inside the rod body 12. The rod head and the earring 1101 are located on the outer sides of the two ends of the rod body 12, respectively.

[0024] like Figure 3 , Figure 4 As shown, the core tube feeding device 2 is arranged on the side of the core tube area 101, and the rod body feeding device 3 is arranged on the side of the rod body area 102. The core tube feeding device 2 includes a first telescopic fork arm 201 and a first elevator 202. The first telescopic fork arm 201 is connected to the output end of the first elevator 202. The first elevator 202 drives the core tube to move up and down. The core tube is installed on the first telescopic fork arm 201. The first telescopic fork arm 201 transports the core tube to the top of the core tube area 101. Then, the first elevator 202 drives the first telescopic fork arm 201 to descend and place the core tube on the core tube positioning fixture 4 and the core tube adjusting device. The rod feeding device 3 includes a second telescopic fork arm 301 and a second elevator 302. The first telescopic fork arm 201 is connected to the output end of the second elevator 302 and is driven to move up and down by the second elevator 302. The rod 12 is installed on the second telescopic fork arm 301 and is transported to the top of the rod area 102 by the second telescopic fork arm 301. Then, the second elevator 302 drives the second telescopic fork arm 301 to descend and place the core tube on the rod adjustment device.

[0025] After the rod 12 is installed on the rod adjustment device, the height of the rod 12 is adjusted by the rod adjustment device so that the rod 12 is aligned with the rod positioning fixture 7. The rod adjustment device moves on the slide rail, driving the rod 12 to move towards the head end of the worktable 1, so that the head end of the rod 12 is installed into the rod positioning fixture 7.

[0026] The rod positioning fixture 7 is detachably installed at the head end of the worktable 1. The head end of the rod 12 is installed on the rod positioning fixture 7 to maintain the position of the rod 12 and ensure that the rod 12 does not move when the core tube 11 is introduced.

[0027] The head and middle parts of the core tube 11 are mounted on the core tube adjustment device, and the earring 1101 at the tail end is mounted on the core tube positioning fixture 4. The height of the core tube is adjusted by the core tube adjustment device so that the axis of the core tube 11 and the rod body 12 are at the same height. The core tube adjustment device and the core tube positioning fixture 4 move synchronously on the slide rail, driving the core tube 11 to move towards the rod body area 102.

[0028] The core tube positioning fixture 4 is also equipped with a pressing device. After the core tube 11 is introduced into the rod body 12, an axial force is applied to the ear ring 1101 at the tail end of the core tube 11 to press the core tube 11 into the rod body 12. Then, the rod body 12 and the core tube 11 are welded together at both ends to fix the rod body 12 and the core tube 11 together.

[0029] Example 2

[0030] This embodiment provides a welding device for the piston rod of an extension arm cylinder based on Embodiment 1. In this embodiment, as shown... Figure 1 , Figure 3 , Figure 4 As shown, three core tube feeding devices 2 are provided, arranged at intervals. Each core tube feeding device 2 also includes a core tube rack 203, as shown... Figure 3 The central structure is a core tube rack 203, which includes an upper and a lower layer. Several sliding wheels 204 are installed at the bottom of the core tube rack 203, and these wheels slide in contact with guide rails 205 on the ground. Two guide rails 205 are arranged parallel to the workbench 1 on the side of the ground. The upper layer of the core tube rack 203 has a sliding groove with a through hole at its front end. A first lifting mechanism 202 is installed on the lower layer, and its output end is connected to the bottom of a first telescopic fork arm 201. The first telescopic fork arm 201 is driven by the first lifting mechanism 202 to move up and down through the through hole. The first telescopic fork arm 201 includes a telescopic slide and a boom. The boom moves back and forth on the telescopic slide, and several V-shaped grooves are provided on the boom. Core tubes are placed in the V-shaped grooves of the boom. The upper rear end of the core tube rack 203 has a sloping structure. The core tube is first hoisted and placed on the upper layer of the core tube rack 203. The first elevator 202 drives the first telescopic fork arm 201 to descend. Then the upper core tube slides into the boom of the first telescopic fork arm 201. The first elevator 202 drives the first telescopic fork arm 201 to move upward, lifting the core tube and sending it to the core tube area 101 of the workbench 1 through the boom.

[0031] In this embodiment, two rod feeding devices 3 are provided, arranged at intervals on the side of the workbench 1. The rod feeding device 3 also includes a rod rack 303, such as... Figure 4 The middle line structure is a rod material rack 303. The rod material rack 303 is similar in structure to the core tube material rack 203. The difference is that the rod material rack 303 does not have a sliding wheel 204 at the bottom and there is no guide rail 205 on the installation ground. The rod material rack 303 is fixed to the ground.

[0032] The structure and installation method of the second telescopic fork arm 301 and the second elevator 302 on the rod material rack 303 are the same as those of the first telescopic fork arm 201 and the first elevator 202. When conveying the rod 12, the second telescopic fork arm 301 is driven to move up and down by the second elevator 302. The rod 12 on the rod material rack 303 slides into the arm of the second telescopic fork arm 301. Then the second telescopic fork arm 301 is lifted, and the arm on the second telescopic fork arm 301 conveys the rod 12 to the rod area 102 of the workbench 1.

[0033] In this embodiment, as Figure 1 As shown, a groove is provided on the worktable 1, and an upper slide rail 103 is provided at the end of the worktable 1, and a lower slide rail 104 is provided inside the groove.

[0034] like Figure 1 , Figure 5 As shown, the core tube positioning fixture 4 is mounted on the upper slide rail 103 of the worktable 1 via the first servo slide plate 401. The first servo slide plate 401 drives the core tube positioning fixture 4 to slide on the upper slide rail 103. The core tube positioning fixture 4 includes a top-pressing cylinder 402, a cylinder bracket 403, and a support plate 404. The support plate 404 is fixedly mounted on the first servo slide plate 401 and has a U-shaped structure. The ear ring 1101 on the core tube is placed on the support plate 404. The top-pressing cylinder 402 is mounted on the first servo slide plate 401 via the cylinder bracket 403. The output end of the top-pressing cylinder 402 acts on the end face of the ear ring 1101. After the core tube 11 is fully inserted into the rod body 12, the top-pressing cylinder 402 applies an axial pressing force to the core tube 11, pressing the core tube 11 into the rod body 12 for welding spot fixation.

[0035] like Figure 1 , Figure 2 , Figure 6 , Figure 7 , Figure 8As shown, the core tube adjustment device includes a core tube bracket 5 and a core tube inlet fixture 6. In this embodiment, two core tube brackets 5 are provided. The two core tube brackets 5 are respectively mounted on the lower slide rail 104 of the worktable 1 via two second servo slide plates 501. The second servo slide plates 501 drive the core tube brackets 5 to slide on the lower slide rail 104. The core tube bracket 5 includes a support plate 502, a partition positioning frame 503, a first lifting slide 504, and a second lifting slide 505. The first lifting slide is vertically mounted on the second servo slide plate 505. On plate 501, a second lifting slide 505 is mounted parallel to the first lifting slide 504 on the slider of the first lifting slide 504. A support plate 502 is mounted on the top of the fixed end of the second lifting slide 505, and a partition positioning frame 503 is mounted on the slider of the second lifting slide 505. The support plate 502 is driven to move up and down by the first lifting slide 504, and the partition positioning frame 503 is driven to move up and down by the second lifting slide 505. Both the support plate 502 and the partition positioning frame 503 are used to support the core tube. The support plate 502 is a vertically placed I-shaped structure, and the partition positioning frame 503 is a U-shaped structure. The support plate 502 is located to the left of the partition positioning frame 503 and moves from left to right when the core tube 11 is introduced into the rod 12. Proximity switches for detecting the partitions on the core tube are installed on both the support plate 502 and the partition positioning frame 503.

[0036] During the process of introducing the core tube 11 into the rod 12, when the proximity switch on the partition positioning frame 503 detects the partition on the core tube, the first lifting slide 504 and the second lifting slide 505 drive the support plate 502 and the partition positioning frame 503 to move downwards to avoid collision between the partition and the support plate 502 and the partition positioning frame 503. The detection distance of the proximity switch on the partition positioning frame 503 is greater than the distance from the proximity switch to the leftmost side of the support plate 502, and the proximity switch on the partition positioning frame 503 is located on the left side, allowing for detection first. When the proximity switch detects the partition, there is still a distance between the partition and the support plate 502. The support plate 502 and the partition positioning frame 503 descend, and the core tube continues to be introduced. When the proximity switch on the support plate 502 detects that the partition has passed the support plate 502, the first lifting slide 504 drives the support plate 502 to rise and support the core tube. The proximity switch on the support plate 502 is located on the upper end surface. The proximity switch only detects the partition when the partition passes the support plate 502, and then the support plate 502 rises in time to support the core tube. When the proximity switch on the partition positioning frame 503 no longer detects the partition, the second lifting slide 505 drives the partition positioning frame 503 to rise and support the core tube. During this process, it can be set that after a period of time, the second slide will be driven to raise the partition positioning frame 503 after the proximity switch no longer detects the partition. The position of the proximity switch can be adjusted according to the actual situation. During the core tube introduction process, the core tube bracket 5 performs the above process once every time it passes a partition. Moreover, during the core tube introduction process, the first lifting slide 504 drives the support plate 502 to swing up and down with a swing stroke of 2-20mm and a frequency of 20 times / minute. The swing guides the upper partition of the core tube 11 to pass through the inner hole of the rod body 12.

[0037] like Figure 8 As shown, the core tube inlet fixture 6 is mounted on the lower slide rail 104 of the worktable 1 via the third servo slide plate 601. The core tube inlet fixture 6 includes a second support plate 602, a third lifting slide 603, and a connecting plate 604. The third lifting slide 603 is vertically mounted on the third servo slide plate 601, and the second support plate 602 is mounted on the slider of the third lifting slide 603 via the connecting plate 604. The second support plate 602 has a V-shaped structure, and the head end of the core tube is placed on the second support plate 602. The core tube inlet fixture 6 is mounted on the head end of the core tube area 101. When the head end of the core tube moves to the position of the core tube inlet fixture 6, the third lifting slide 603 drives the second support plate 602 to rise. The second support plate 602 supports the head end of the core tube, adjusts the height of the head end of the core tube, and ensures the coaxiality of the core tube 11 and the rod 12. A proximity switch is provided on the second tray 602. When the proximity switch detects the partition on the core tube, the third lifting slide 603 drives the second tray 602 to descend. When the proximity switch does not detect the partition, the second tray 602 rises.

[0038] like Figure 9As shown, the rod positioning fixture 7 is detachably mounted on the head end of the upper surface of the workbench 1 by bolts. The rod positioning fixture 7 includes a mounting base 701 and a sleeve 702. The mounting base 701 is mounted on the workbench 1 by bolts, and the sleeve 702 is horizontally mounted on the mounting base 701. One end of the sleeve 702 is connected to the mounting base 701, and the other end is an open structure aligned with the rod 12. The position is adjusted by the rod adjustment device to insert the head end of the rod 12 into the sleeve 702, thus determining the position of the rod 12. A pressure sensor is installed on the rod positioning fixture 7. After the core tube 11 is fully inserted into the rod 12, the top-pressing cylinder 402 on the core tube positioning fixture 4 applies a pressing force to the core tube. The pressing force also acts on the rod 12, pressing the rod 12 and the core tube 11 together. The pressure sensor detects the pressing force applied by the top-pressing cylinder 402 and adjusts the output of the top-pressing cylinder 402 to ensure that the pressing force is appropriate.

[0039] like Figure 1 , Figure 10 , Figure 11 , Figure 12 , Figure 13 As shown, the rod adjustment device includes a rod bracket 8, a height adjustment fixture 9, and a clamping fixture 10. In this embodiment, there are two rod brackets 8. Each rod bracket 8 is mounted on the lower slide rail 104 of the worktable 1 via a fourth servo slide plate 801. The rod bracket 8 includes a horizontal slide 802, rollers 803, and a telescopic cylinder 804. The telescopic cylinder 804 is mounted on the fourth servo slide plate 801, and its output end is connected to the bottom of the horizontal slide 802 to drive the horizontal slide 802 to move up and down. The horizontal slide 802 is provided with two sliders, and each slider is rotatably mounted with a roller 803. The two rollers 803 are spaced apart, and the rod 12 is positioned between the two rollers 803. The distance between the two rollers 803 is adjusted by the horizontal slide 802 to accommodate rods 12 of different diameters. The rollers 803 are driven to move up and down by the telescopic cylinder 804.

[0040] The height adjustment fixture is mounted on the lower slide rail 104 of the worktable 1 via the fifth servo slide plate 901. The height adjustment fixture includes a rod support plate 902 and a telescopic cylinder 903. The telescopic cylinder 903 is mounted on the fifth servo slide plate 901, and its output end is connected to the bottom of the rod support plate 902. The telescopic cylinder 903 drives the rod support plate 902 to move up and down. The rod support plate 902 has a V-shaped structure, and the rod 12 is placed on the rod support plate 902.

[0041] like Figure 13As shown, the clamping fixture 10 is mounted on the upper slide rail 103 of the worktable 1 via the sixth servo slide plate 1001. The clamping fixture 10 includes a clamping plate slide 1003 and clamping plates. The two clamping plates are mounted on the slider of the clamping plate slide 1003. The clamping plate slide 1003 drives the opening and closing of the two clamping plates. During the process of the core tube 11 being introduced into the rod body 12, the clamping plates hold the rod body 12 to prevent the rod body 12 from rotating. After the core tube 11 is completely introduced into the rod body 12, the two clamping plates open and disengage from the rod body 12.

[0042] In this embodiment, the core tube area 101 of the workbench 1 is equipped with a core tube positioning fixture 4, two core tube brackets 5, and a core tube guide fixture 6. The number of core tube brackets 5 is adjusted according to the length of the core tube. The core tube positioning fixture 4 is mounted on the upper slide rail 103. The core tube brackets 5 and the core tube guide fixture 6 are equipped with lifting mechanisms and are mounted on the lower slide rail 104. The ear loop 1101 at the tail end of the core tube is mounted on the core tube positioning fixture 4. The height of the remaining part of the core tube is adjusted by the core tube brackets 5 and the core tube guide fixture 6 so that the axis of the core tube 11 is horizontal and at the same height as the axis of the rod 12. The rod area 102 of the workbench 1 is equipped with a rod positioning fixture 7, two rod brackets 8, a height adjustment fixture 9, and a clamping fixture 10. The number of rod brackets 8 is adjusted according to the length of the rod 12. Two rod brackets 8 are arranged in the middle of the rod area 102. The rod positioning fixture 7 is installed at the head of the workbench 1, and the clamping fixture 10 is installed on the upper slide rail 103. The rod brackets 8 and the height adjustment fixture 9 are equipped with lifting mechanisms and are installed on the lower slide rail 104. After the rod 12 is installed on the height adjustment fixture 9 and the rod bracket 8 by the rod feeding device 3, the clamping fixture 10 is driven to move to the right by the sixth servo slide plate 1001 to clamp the rod 12. Then the clamping fixture 10, the rod bracket 8, and the height adjustment fixture 9 move to the right so that the head end of the rod 12 extends into the sleeve 702 on the rod positioning fixture 7 and is fixed. The sleeve 702 has a slot, and the welding device extends into the sleeve 702 from the slot to perform spot welding.

[0043] In this embodiment, the controller is an editable PLC controller. The control unit also includes a human-machine interface device. Edited instructions are input through the human-machine interface device, and the controller executes the instructions to drive the various devices. The first servo slide plate 401 to the sixth servo slide plate 1001 are connected to the controller, which precisely controls the movement of the slide plates on the slide rail. The first lifting slide plate 504 to the third lifting slide plate 603 are connected to the controller, which controls the output stroke. Telescopic cylinders 804 and 903 are also connected to the controller. The first telescopic fork arm 201, the second telescopic fork arm 301, the first elevator 202, and the second elevator 302 on the core tube feeding device 2 and the rod feeding device 3 are connected to the controller, which precisely controls the movement stroke. The aforementioned servo slide plates, telescopic cylinders, telescopic fork arms, slide plates, elevators, etc., are all existing technologies, designed to adjust the positions of the rod 12 and the core tube 11. Under normal circumstances, these devices can also be replaced with other devices with equivalent adjustment functions.

[0044] When the core tube 11 is introduced into the rod 12, the first servo slide plate 401 and the two second servo slide plates 501 on the two core tube brackets 5 move synchronously, causing the core tube 11 to move to the right. After one of the core tube brackets 5 moves to the right and into position, the other two servo slide plates move synchronously to drive the core tube to move to the right. During the movement of the core tube bracket 5 to the right, the first lifting slide 504 and the second lifting slide 505 on it also perform the lifting and lowering movement to avoid the partition on the core tube as described above, and the first lifting slide 504 also performs up and down swinging.

[0045] On both sides of the workbench 1, the upper right side is a rod stacking area. Rods 12 are first stacked in the rod stacking area, and then a crane is used to lift the rods 12 onto the rod rack 303. Two parallel slide rails are arranged on the ground at the lower right side, and the core tube feeding device 2 is arranged on the slide rails. Two rod feeding devices 3 are arranged at the upper left side of the workbench 1, and the lower right side is a core tube stacking area. Core tubes 11 are first stacked in the core tube stacking area, and then a crane is used to lift the core tubes 11 onto the core tube rack 203. An electrical control cabinet 105 is set in the middle of the right side, and a human-machine interface device is installed on the electrical control cabinet 105 to facilitate monitoring of the working status of various devices and tooling on the workbench 1.

[0046] The equipment provided in this embodiment adopts automated feeding, automated core tube insertion, and a large number of electric and pneumatic tooling designs, effectively improving the efficiency and stability of the welding operation. It achieves a 40% increase in core tube insertion efficiency and a production capacity of 25 pieces per shift. It ensures the coaxiality and perpendicularity between the rod body, core tube, and lugs, improving the quality of the welding operation and reducing the cost waste caused by rework and repair. The welding qualification rate reaches 99.5%, reducing the labor intensity of manual welding operations and meeting the development needs of high-end and intelligent engineering machinery.

[0047] Example 3

[0048] This embodiment provides a welding method for the piston rod of an extension arm cylinder based on Embodiment 2, specifically including the following steps: A crane is used to lift the rod 12 onto the rod rack 303, which can hold multiple rods 12. The second lift 302 lowers the second telescopic fork arm 301, and the rod 12 slides into the boom of the second telescopic fork arm 301. Then, the second lift 302 raises the second telescopic fork arm 301 above the worktable 1. The boom of the second telescopic fork arm 301 then transports the rod 12 towards the worktable 1. After the boom reaches its position, the rod on the worktable 1... The roller 803 on the body bracket 8 rises, and the rod bracket 8 rises to catch the rod 12. Then, the rod 12 is driven to fall, so that the rod 12 is aligned with the sleeve 702 on the rod positioning fixture 7. The clamping fixture 10 moves to the right to the end of the rod 12. The two clamping plates clamp the rod 12. Then, the fifth servo slide plate 901 and the fourth servo slide plate 801 move to the right simultaneously, inserting the end of the rod into the sleeve 702. After the head end of the rod 12 is fixed in the sleeve 702, its position remains unchanged.

[0049] During the above process, the core tube 11 is loaded simultaneously. Specifically, a crane is used to lift the core tube 11 onto the core tube rack 203. Multiple core tubes 11 can also be placed on the core tube rack 203. The first elevator 202 drives the first telescopic fork arm 201 to descend, and the core tube 11 slides into the boom of the first telescopic fork arm 201. Then, the first elevator 202 drives the first telescopic fork arm 201 to rise above the worktable 1. Then, the boom of the first telescopic fork arm 201 transports the core tube 11 towards the worktable 1. After the boom moves into position, the pallet 502 and the partition positioning frame 503 on the core tube bracket 5 on the worktable 1 rise and drag the core tube. At this time, the ear loop 1101 at the tail end of the core tube 11 is placed on the support plate 404 of the core tube positioning fixture 4, thus completing the loading of the core tube 11.

[0050] The first servo slide plate 401 and the two second servo slide plates 501 on the core tube area 101 move synchronously to the right, driving the core tube on them to move to the right. When the proximity switch on the second support plate 602 detects the head end of the core tube, the third lifting slide 603 drives the second support plate 602 to rise, and the rising support plate 602 supports the head end of the core tube. Then, the first servo slide plate 401 and the two second servo slide plates 501 continue to move synchronously to the right, and the core tube begins to be inserted into the rod body. During the process of guiding the core tube 11 into the rod 12, the core tube bracket 5 stops moving after moving to its right limit position, while the core tube positioning fixture 4 and the other core tube bracket 5 continue to move. When the partition on the core tube passes the bracket, the proximity switch on the partition positioning frame 503 first detects the position of the partition, and the first lifting slide 504 and the second lifting slide 505 drive the first support plate 502 and the partition positioning frame 503 to descend. When the proximity switch on the first support plate 502 detects that the partition has passed the first support plate 502, the first lifting slide 504 drives the first support plate 502 to rise. When the proximity switch on the partition positioning frame 503 detects that the partition has passed the partition positioning frame 503, the second lifting slide 505 drives the partition positioning frame 503 to rise. The above actions are repeated when each partition passes the core tube bracket 5. When the proximity switch on tray 2 602 detects the partition, the third lifting slide 603 drives tray 2 602 to descend. After detecting that the partition has passed tray 2 602, tray 2 602 rises.

[0051] After the core tube 11 is fully inserted into the rod body 12, the clamping plate on the clamping fixture 10 opens and detaches from the rod body 12. The head end of the core tube 11 extends out from the head end of the rod body 12, and the end face of the ear ring 1101 at the tail end of the core tube 11 contacts and engages with the end face of the rod body 12. Then, the top-pressing cylinder 402 is activated, and the output end of the top-pressing cylinder 402 presses against the other end face of the ear ring 1101, applying an axial pressing force to the core tube 11 and the rod body 12. The applied pressing force is detected by the pressure sensor on the rod positioning fixture 7.

[0052] After the core tube and rod are pressed together by the top pressure cylinder 402, the end faces of the rod 12 that mate with the core tube 11 are welded and fixed to form a piston rod. The fourth servo slide plate 801 and the fifth servo slide plate 901 move to the left together to pull the head end of the piston rod out of the sleeve 702. The piston rod is then unloaded to the side without the rod feeding device 3 by a crane.

[0053] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A welding device for the piston rod of a boom cylinder, characterized in that, include: The workbench is equipped with slide rails and includes a rod body area and a core tube area. The rod body is installed in the rod body area and the core tube is installed in the core tube area. A core tube feeding device for moving the core tube to the core tube area includes a first telescopic fork arm and a first elevator, wherein the first telescopic fork arm is installed at the output end of the first elevator. A rod feeding device for moving the rod to the rod area includes a second telescopic fork arm and a second elevator, wherein the second telescopic fork arm is installed at the output end of the second elevator. A core tube positioning fixture is slidably mounted on a slide rail at the tail end of the core tube area for positioning the earring at the tail end of the core tube; The core tube adjustment device is slidably mounted on the slide rail in the core tube area and is used to adjust the position of the core tube and guide the core tube into the rod body; A rod positioning fixture is installed at the head end of the rod area to position the head end of the rod. A rod adjustment device is slidably mounted on a slide rail in the rod area for adjusting the position of the rod; The control unit includes a controller, which is electrically connected to the core tube feeding device, the rod feeding device, the core tube positioning fixture, the core tube adjusting device, and the rod adjusting device. The core tube positioning fixture is slidably mounted on the slide rail via the first servo slide plate, and the ear loop of the core tube is mounted on the core tube positioning fixture; The core tube positioning fixture includes a support plate, a top-pressing cylinder, and a cylinder bracket. The support plate is mounted on the first servo slide plate, and the earring on the core tube is placed on the support plate. The top-pressing cylinder is mounted on the first servo slide plate through the cylinder bracket. The output end of the top-pressing cylinder faces the end face of the earring. After the core tube is introduced into the rod body, the output end of the top-pressing cylinder extends out and presses against the end face of the earring. The rod positioning fixture is equipped with a pressure sensor, which is used to detect the clamping force applied by the top pressure cylinder; The core tube adjustment device includes a core tube bracket and a core tube inlet fixture. The core tube bracket is mounted on the slide rail via a second servo slide plate, and the core tube inlet fixture is mounted on the slide rail via a third servo slide plate. The first servo slide and the second servo slide move synchronously on the slide rail to guide the core tube into the rod body; At least two core tube brackets are provided. The core tube brackets and the core tube inlet fixture are arranged at intervals in the core tube area. The core tube brackets are located between the core tube inlet fixture and the core tube positioning fixture. The rod positioning fixture includes a mounting base and a sleeve. The mounting base is detachably mounted on the head end of the workbench. One end of the sleeve is mounted on the mounting base, and the other end is an open structure aligned with the rod. The head end of the rod extends into the sleeve. The rod adjustment device includes a rod bracket, a height adjustment fixture, and a clamping fixture, wherein there is at least one rod bracket; The rod bracket is mounted on the slide rail via the fourth servo slide plate, the height adjustment fixture is mounted on the slide rail via the fifth servo slide plate, and the clamping fixture is mounted on the slide rail via the sixth servo slide plate.

2. The welding equipment for the piston rod of the extension boom cylinder according to claim 1, characterized in that, The core tube bracket includes a support plate, a partition positioning frame, a first lifting slide, and a second lifting slide. The first lifting slide is vertically mounted on the first servo slide plate, and the second lifting slide is mounted on the slider of the first lifting slide. The tray is installed on the fixed end of the second lifting slide, and the partition positioning frame is installed on the slider of the second lifting slide. The height of the first lifting slide is adjusted by adjusting the height of the second lifting slide, and the height of the partition positioning frame is adjusted by the second lifting slide. Both the partition positioning frame and the tray are equipped with proximity switches; During the process of the core tube being introduced into the rod, when the proximity switch on the partition positioning frame detects the partition on the core tube, the first lifting slide and the second lifting slide drive the first support plate and the partition positioning frame to descend together. When the proximity switch on the first support plate detects that the partition on the core tube has passed the first support plate, the first lifting slide drives the first support plate to rise, and the first support plate holds the core tube.

3. The boom cylinder piston rod welding equipment according to claim 1, characterized in that, The core tube insertion fixture includes a second support plate, a connecting plate, and a third lifting slide. The third lifting slide is vertically mounted on a third servo slide plate. The second support plate is mounted on the slider of the third lifting slide via the connecting plate. The core tube is placed on the second support plate, and the height of the second support plate is adjusted via the third lifting slide. The second pallet is equipped with a proximity switch. When the proximity switch detects the partition on the core tube, the third lifting slide moves the second pallet downward.

4. The boom cylinder piston rod welding equipment according to claim 1, characterized in that, The clamping fixture includes two clamping plates and a clamping plate slide. The clamping plate slide is mounted on the sixth servo slide. The two clamping plates are respectively mounted on two sliders on the clamping plate slide. The two clamping plates clamp the rod body. After the core tube is fully inserted into the rod body, the two clamping plates open and detach from the rod body.

5. The boom cylinder piston rod welding equipment according to claim 1, characterized in that, The rod support includes a horizontal slide, rollers, and a telescopic cylinder. A telescopic cylinder is vertically mounted on the fourth servo slide plate. The output end of the telescopic cylinder is connected to the bottom of the horizontal slide table. Two sliders are provided on the horizontal slide table, and two rollers are rotatably mounted on the two sliders respectively. The rod is positioned between two rollers. The distance between the two rollers is adjusted by a horizontal slide to accommodate rods of different specifications. The vertical height of the rollers is adjusted by a telescopic cylinder.

6. The boom cylinder piston rod welding equipment according to claim 1, characterized in that, The height adjustment fixture includes a rod support plate and a telescopic cylinder 2. The telescopic cylinder 2 is vertically mounted on the fifth servo slide plate. The output end of the telescopic cylinder 2 is connected to the bottom of the rod support plate. The rod is placed on the rod support plate, and the height of the rod support plate in the vertical direction is adjusted by the telescopic cylinder 2.

7. The boom cylinder piston rod welding equipment according to claim 1, characterized in that, At least two core tube feeding devices are provided, arranged at intervals on the side of the workbench. Each core tube feeding device also includes a core tube rack, sliding wheels, and guide rails. The first elevator is installed on the lower layer of the core tube rack, and the output end of the first elevator is connected to the bottom of the first telescopic fork arm, driving the first telescopic fork arm to move vertically. Several sliding wheels are installed at the bottom of the core tube rack, and the sliding wheels cooperate with the guide rails on the ground. The core tube rack is used to place core tubes. At least two rod feeding devices are provided, arranged at intervals on the side of the workbench. The rod feeding device also includes a rod rack. A second lift is installed on the lower layer of the rod rack. The output end of the second lift is connected to the bottom of the second telescopic fork arm, driving the second telescopic fork arm to move in the vertical direction. The rod rack is used to place rods. The core tube feeding device and the rod feeding device are respectively arranged on opposite sides of the workbench.

8. A method for through-welding the piston rod of an extension boom cylinder, characterized in that, The method employs the welding equipment for the piston rod of the extension boom cylinder as described in any one of claims 1-7, and includes the following steps: The core tube is hoisted onto the first telescopic fork arm of the core tube feeding device. The first telescopic fork arm moves the core tube above the core tube area. The height of the first telescopic fork arm is adjusted by the first elevator so that the core tube is positioned on the core tube adjustment device and the core tube positioning fixture. The first telescopic fork arm then returns to its original position. At the same time, the rod is hoisted onto the second telescopic fork arm of the rod feeding device. The second telescopic fork arm moves the rod to the top of the rod area. The height of the second telescopic fork arm is adjusted by the second elevator so that the rod is located on the rod adjustment device. The second telescopic fork arm then returns to its original position. Then, the rod head is moved to the rod positioning fixture by the rod adjustment device to determine the rod position; The position of the core tube is adjusted by the core tube adjustment device so that the axis of the core tube is at the same height as the axis of the rod. The core tube is introduced into the rod body through the core tube adjustment device, with the head and tail ends of the core tube extending out from both ends of the rod body, respectively. The core tube is pressed and positioned within the rod body using a core tube positioning fixture; Welding is performed at both ends of the core tube and the rod to fix the core tube and the rod in place.

Images