Bent pipe laser welding machine

Abstract

The utility model discloses a bend laser welding machine which comprises a workbench and is characterized in that the workbench is provided with a welding station, a bend feeding mechanism, a laser welding mechanism, a connector feeding mechanism and a discharging mechanism, and the bend feeding mechanism, the laser welding mechanism, the connector feeding mechanism and the discharging mechanism are arranged on the periphery of the welding station in a surrounding mode. A tool clamp is arranged on the welding station, the tool clamp is arranged on a rotating seat, a positioning clamping jaw is arranged above the tool clamp in a lifting mode, and deviation rectifying clamping blocks are arranged on the two sides of the tool clamp in a relative moving mode; the connector feeding mechanism transmits a connector to the tool clamp, the bent pipe feeding mechanism transmits a bent pipe to be overlapped at the upper end of the connector, the correction clamping block conducts correction and the positioning clamping jaw conducts positioning, and the laser welding mechanism is arranged on the sliding seat and can move to be close to the welding position of the bent pipe and the connector. And the discharging mechanism is used for conveying out the welded bent pipe. The elbow welding device realizes automatic welding of the elbow, and is accurate in welding and reliable in quality.

Description

Technical Field

[0001] This utility model relates to an improved invention of a laser welding machine, and more particularly to an improved invention of a laser welding machine for bending pipes. Background Technology

[0002] Laser welding utilizes high-energy laser pulses to locally heat a small area of ​​material. The energy from the laser radiation diffuses into the material through heat conduction, melting it to form a specific molten pool. It is a novel welding method primarily used for welding thin-walled materials and precision parts. Therefore, laser welding has replaced argon arc welding for welding pipe fittings, enhancing the robustness of the welded structure and offering significant advantages.

[0003] In existing technologies, the welding of bends and joints is typically performed manually in conjunction with laser welding machines and tooling fixtures. The joint is positioned within the fixture, the bend is stacked on top of the joint and manually secured before welding. This process results in poor welding quality, low yield rates, low production efficiency, and increased labor costs, failing to meet the production demands of a rapidly developing industrial society. Furthermore, the joint and bend cannot be positioned simultaneously using a positioning mandrel (liner) because the curved structure of the bend restricts the insertion of the mandrel. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a stable and accurate laser welding machine for bending pipes.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: This type of pipe bending laser welding machine includes a worktable, characterized in that: the worktable is provided with a welding station and a pipe bending feeding mechanism, a laser welding mechanism, a joint feeding mechanism, and a discharging mechanism surrounding the welding station; the welding station is provided with a tooling fixture, which is mounted on a rotating seat; a positioning gripper is vertically movable above the tooling fixture; and correction clamps are movable relative to each other on both sides of the tooling fixture; the joint feeding mechanism transfers the joint to the tooling fixture; the pipe bending feeding mechanism transfers the pipe bending to overlap the upper end of the joint, and the correction clamps correct the deviation and the positioning gripper positions it; the laser welding mechanism is mounted on a sliding seat and can move close to the welding point between the pipe bending and the joint; and the discharging mechanism delivers the welded pipe bending externally.

[0006] The joint feeding mechanism includes a joint feeding channel and a joint feeding robot. The joint feeding channel includes a conveyor belt, guide plates on both sides of the conveyor belt, and a baffle plate at the front end of the conveyor belt. A discharge channel is formed between the guide plates and the baffle plate. A pusher block is movably provided on one side of the discharge channel, and the joint feeding robot is connected to the other side of the discharge channel. The joint feeding robot can lift, move and translate to transfer the joint to the tooling fixture.

[0007] The other side of the discharge channel is also provided with a joint correction structure, which includes a first correction push block and a second correction push block that are movably arranged. The first correction push block is arranged opposite to the push block, and the second correction push block is arranged opposite to the baffle plate.

[0008] The pipe bending feeding mechanism includes a pipe bending feeding channel and a pipe bending feeding robot. The pipe bending feeding channel includes a linear vibrating plate and a support plate for supporting the pipe bending to stand upright. The support plate is arranged in the linear vibrating plate along the conveying direction. The pipe bending feeding robot can lift, move and translate to transfer the pipe bending to the upper end of the joint.

[0009] The front end of the linear vibratory feeder is also provided with a baffle, a positioning plate, an upper pressure plate, and a lower top plate. The baffle blocks and limits the transmission of the curved pipe. The upper pressure plate and the lower top plate can be raised and lowered respectively above and below the linear vibratory feeder. The linear vibratory feeder is provided with an opening for the lower top plate to pass through. The upper pressure plate and the lower top plate cooperate to clamp the curved pipe and move it upward. The positioning plate can be moved back and forth. The positioning plate and the baffle cooperate to position the upward-moving curved pipe.

[0010] The bending pipe feeding robot includes a foldable, split-off picking head that can be opened and closed. The picking head can extend into and tension the upper end of the bending pipe, and a positioning fork plate is movably provided on the back side of the bending pipe.

[0011] The discharge path of the discharge mechanism is also equipped with a bend pipe airtightness detection mechanism.

[0012] The bend airtightness testing mechanism includes an upper positioning seat, a lower positioning seat, and a positioning block. The upper end of the bend extends into the upper positioning seat, and an upper sealing block is provided inside the upper positioning seat. The upper sealing block can be moved to fit the upper end of the bend. The lower end of the bend extends into the lower positioning seat, and a lower sealing block is provided inside the lower positioning seat. The lower sealing block can be moved to fit the lower end of the bend. The positioning block is movably disposed on the back side of the bend. The positioning block is provided with a positioning groove that matches the bend. The lower end of the positioning block is limited to the upper end of the connector. An airtightness detector tube connector is inserted through the upper or lower sealing block.

[0013] The discharge mechanism includes a first discharge robot, a second discharge robot, and a discharge hopper. The first discharge robot can lift, move and translate to transfer the welded bent pipe to the bent pipe airtightness testing mechanism. The second discharge robot can lift, move and translate to transfer the airtight bent pipe to the discharge hopper or the airtight bent pipe to the waste inlet.

[0014] The discharge hopper is movable and moves above the waste inlet when it receives a qualified signal from the airtightness detector.

[0015] The beneficial effects of this utility model are that the improved tube bending laser welding machine transfers the joint to the tooling fixture by the joint feeding mechanism, and the bent tube is transferred and stacked on the upper end of the joint by the tube bending feeding mechanism. The correction clamping block corrects the deviation and the positioning claw positions it to ensure that the bent tube and the joint are accurately stacked and the bent tube is positioned. Then, the laser welding mechanism first performs spot welding and then full welding. After the welding is completed, the material is sent out by the unloading mechanism. The above realizes the automated welding of bent tubes, improves production efficiency, and ensures accurate welding and reliable quality. Attached Figure Description

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This utility model Figure 1 Enlarged view of part A.

[0019] Figure 3 This utility model Figure 1 Enlarged view of part B.

[0020] Figure 4 This is a front view of the structure of this utility model.

[0021] Figure 5 This utility model Figure 4 Enlarged view of part C.

[0022] Figure 6 This is a side view of the structure of this utility model.

[0023] Figure 7 This utility model Figure 6 Enlarged view of part D. Detailed Implementation

[0024] The accompanying drawings illustrate the structure of this utility model, and further details will be described below in conjunction with the drawings. In this embodiment, see the attached drawings. Figure 1-7The bending laser welding machine includes a worktable with a welding station 1 and a bending pipe feeding mechanism 2, a laser welding mechanism 3, a joint feeding mechanism 4, and a discharge mechanism 5 surrounding the welding station 1. The welding station 1 is equipped with a tooling fixture 11, which is mounted on a rotating base 12 and is preferably a rotary pneumatic chuck. A positioning gripper 13 is vertically movable above the tooling fixture 11, preferably a pneumatic gripper driven by a cylinder. Two correction blocks 14 are movable relative to each other on both sides of the tooling fixture 11. 14 is driven by a cylinder to move relative to each other. The clamping end of the correction clamp 14 is provided with an arc groove that matches the outer circle of the lower end of the bend. The joint feeding mechanism 4 transmits the joint to the tooling fixture 11. The bend feeding mechanism 2 transmits the bend to be stacked on the upper end of the joint. The correction clamp 14 corrects the deviation and the positioning claw 13 positions it. The laser welding mechanism 3 is set on the slide and can move close to the welding point of the bend and the joint. Preferably, the slide is driven by a cylinder and can be raised, lowered and moved laterally to adapt to welds of different heights. The discharge mechanism 5 delivers the welded bend to the outside.

[0025] The working principle of this utility model is as follows: First, the joint feeding mechanism 4 transmits the joint to the tooling fixture 11, and the tooling fixture 11 positions it. Second, the bend feeding mechanism 2 transmits the bend to overlap the upper end of the joint, and the two side correction clamps 14 move closer to each other to correct the position of the bend on the joint. Then, the positioning claw 13 descends to clamp the bend for positioning. Third, the laser welding mechanism 3 moves close to the welding point between the bend and the joint to perform spot welding for positioning. Then, the positioning claw 13 releases the bend and rises, and the rotating seat 12 drives the tooling fixture 11 to rotate. The laser welding mechanism 3 performs a full circle of welding on the bend and the joint. Fourth, the correction clamps 14 separate and reset, and the discharge mechanism 5 sends the welded bend out.

[0026] For a further improved implementation method, see Appendix Figure 2The joint feeding mechanism 4 includes a joint feeding channel and a joint feeding robot 41. The joint feeding channel includes a conveyor belt 42, guide plates 43 located on both sides of the conveyor belt 42, and a baffle plate 44 located at the front end of the conveyor belt 42. A discharge channel 45 is formed between the guide plates 43 and the baffle plate 44. A pusher block 46 is movably provided on one side of the discharge channel 45. Preferably, the pusher block 46 is driven by a cylinder. The joint feeding robot 41 is connected to the other side of the discharge channel 45. The joint feeding robot 41 can lift, move and translate to transfer the joint to the tooling fixture 11. Preferably, the joint feeding robot 41 is a pneumatic gripper and is equipped with transverse and longitudinal guide rails, as well as transverse and longitudinal drive cylinders. During operation, the joints are arranged on the conveyor belt 42 and move forward under the action of the conveyor belt 42 and the guide plate 43. The foremost joint is delivered to the baffle plate 44 and is detected by the sensor head. The conveyor belt 42 stops conveying, and the pusher block 46 extends into the discharge channel 45, pushing the joint to the joint loading robot 41 for gripping. The joint loading robot 41 descends to grip the joint, and then rises, moves horizontally, and descends to transfer the joint to the tooling fixture 11. The baffle plate 44 and the pusher block 46 are designed to correct the position of the joint discharge and facilitate the gripping of the joint loading robot 41.

[0027] For a further improved implementation method, see Appendix Figure 2 On the other side of the discharge channel 45, a joint correction structure is also provided. The joint correction structure includes a first correction push block 47 and a second correction push block 48 that are movably arranged. The first correction push block 47 is arranged opposite to the push block 46, and the second correction push block 48 is arranged opposite to the baffle plate 44. Both the first correction push block 47 and the second correction push block 48 are driven by cylinders to push the joint and further correct the position of the joint so that it can be grasped by the joint feeding robot 41.

[0028] For a further improved implementation method, see Appendix Figure 4-5 The bending pipe feeding mechanism 2 includes a bending pipe feeding channel and a bending pipe feeding robot 21. The bending pipe feeding channel includes a linear vibrating plate 22 and a support plate 23 for supporting the bending pipe to stand upright. That is, the support plate 23 is supported below the suspended bending part of the bending pipe, and the support plate 23 is arranged in the linear vibrating plate 22 along the conveying direction. The bending pipe feeding robot 21 can lift, move and translate to transfer the bending pipe to the upper end of the joint.

[0029] For a further improved implementation method, see Appendix Figure 5The front end of the linear vibrating plate 22 is also provided with a baffle 24, a positioning plate 25, an upper pressure plate 26, and a lower top plate 27. The baffle 24 blocks and limits the transmission of the bent pipe. The upper pressure plate 26 and the lower top plate 27 can be raised and lowered respectively above and below the linear vibrating plate. The linear vibrating plate 22 is provided with an opening for the lower top plate 27 to pass through. The upper pressure plate 26 and the lower top plate 27 cooperate to clamp the bent pipe and move it upward. Preferably, the upper pressure plate 26 and the lower top plate 27 are driven by cylinders, and the cylinder pressure of the upper pressure plate 26 is less than the cylinder pressure of the lower top plate 27. The positioning plate 25 is driven by a cylinder and can be moved back and forth. The positioning plate 25 and the baffle 24 cooperate to position the upward-moving bent pipe. During operation, the lower top plate 27 rises through the opening of the linear vibrating plate 22 and presses against the lower side of the bent section of the pipe. The upper pressure plate 26 descends and presses against the upper side of the bent section of the pipe. Then, the lower top plate 27 overcomes the pressure of the upper pressure plate 26 and cooperates with it to clamp the bent pipe and move it upward. Then, the positioning plate 25 moves forward to cooperate with the baffle 24 to position the upward-moving bent pipe.

[0030] For a further improved implementation method, see Appendix Figure 5 The bending pipe loading robot 21 includes a closable, split-part picking head that can extend into and tension the upper end of the bending pipe. A positioning fork plate 28 is movably mounted on the back side of the bending pipe. During operation, the positioning fork plate 28 moves toward the bending pipe, matching and positioning the bent part of the pipe. Then, the picking head extends into the upper end of the bending pipe, which is positioned by the positioning plate and the baffle 24. The two split parts of the picking head open and tension the bending pipe. Afterward, the positioning plate 25 and the positioning fork plate 28 move back to their original positions, and the bending pipe is transferred by the picking head.

[0031] As a further improved implementation, the discharge mechanism 5 is also provided with a bend airtightness detection mechanism 6 on the discharge path, which is used to detect the sealing of the weld between the bend and the joint.

[0032] For a further improved implementation method, see Appendix Figure 3The bend airtightness testing mechanism 6 includes an upper positioning seat 61, a lower positioning seat 62, and a positioning block 63. The upper end of the bend extends into the upper positioning seat 61, and an upper sealing block 64 is provided in the upper positioning seat 61. The upper sealing block 64 can be moved to fit the upper end of the bend. Preferably, the upper sealing block 64 is driven by a cylinder. The lower end of the bend extends into the lower positioning seat 62, and a lower sealing block is provided in the lower positioning seat 62. The lower sealing block can be moved to fit the lower end of the bend. Preferably, the lower sealing block is driven by a cylinder. The positioning block 63 is movably disposed on the back side of the bend. The positioning block 63 is provided with a positioning groove that matches the bend. The lower end of the positioning block 63 is limited to the upper end of the connector. An air pipe connector for the airtightness detector is inserted through the upper sealing block 64 or the lower sealing block. A corresponding connection hole is provided on the upper sealing block 64 or the lower sealing block. During operation, the bent pipe is inserted from above into the airtightness testing mechanism while standing upright. Specifically, the upper end of the bent pipe extends into the upper positioning seat 61, and the lower end extends into the lower positioning seat 62. Then, the positioning block 63 moves closer to the bent pipe, and the positioning groove of the positioning block 63 clamps the lower part of the bent pipe, restricting its backward and upward movement. Next, the upper sealing block 64 moves to press and seal the upper end of the bent pipe, and the lower sealing block moves to press and seal the lower end of the bent pipe. Finally, the airtightness detector injects gas into the bent pipe through the air pipe and obtains airtightness data by detecting the air pressure to determine whether the bent pipe is qualified.

[0033] For a further improved implementation method, see Appendix Figure 1 The discharge mechanism 5 includes a first discharge robot 51, a second discharge robot 52, and a discharge hopper 53. The first discharge robot 51 can lift, move, and transfer the welded bent pipe to the pipe airtightness testing mechanism. The second discharge robot can lift, move, and transfer the airtight bent pipe to the discharge hopper 53 or the airtight bent pipe to the waste inlet 54. The first discharge robot 51 and the second discharge robot 52 are preferably pneumatic grippers and equipped with lifting and translation transmission structures, such as a combination of a cylinder and a guide rail.

[0034] For a further improved implementation method, see Appendix Figure 1 The discharge hopper 53 is movable. When the discharge hopper 53 receives a qualified signal from the airtightness detector, it moves above the waste inlet 54 to intercept qualified products and send them out through the discharge hopper 53.

[0035] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A tube laser welding machine comprising a worktable, characterized in that: The workbench is provided with a welding station, a bent pipe feeding mechanism, a laser welding mechanism, a joint feeding mechanism and a discharging mechanism which are arranged around the welding station; the welding station is provided with a tool clamp which is arranged on a rotating seat, a positioning clamp jaw is arranged above the tool clamp, and a deviation rectifying clamp block is movably arranged on both sides of the tool clamp; the joint feeding mechanism feeds a joint to the tool clamp, the bent pipe feeding mechanism feeds a bent pipe to the upper end of the joint, and the bent pipe is rectified by the deviation rectifying clamp block and positioned by the positioning clamp jaw, the laser welding mechanism is arranged on a sliding seat and can be moved to be close to the welding position of the bent pipe and the joint, and the discharging mechanism discharges the bent pipe after welding.

2. The tube laser welding machine of claim 1, wherein: The joint feeding mechanism comprises a joint feeding channel and a joint feeding manipulator, the joint feeding channel comprises a conveying belt, guide plates arranged on both sides of the conveying belt and a blocking plate arranged at the front end of the conveying belt, a discharging channel is formed between the guide plates and the blocking plate, a pushing block is movably arranged on one side of the discharging channel, and the joint feeding manipulator is connected to the other side of the discharging channel, the joint feeding manipulator can lift and translate to feed a joint to the tool clamp.

3. The tube laser welding machine of claim 2, wherein: The other side of the discharging channel is further provided with a joint deviation rectifying structure, the joint deviation rectifying structure comprises first and second deviation rectifying pushing blocks which are movably arranged, the first deviation rectifying pushing block is arranged opposite to the pushing block, and the second deviation rectifying pushing block is arranged opposite to the blocking plate.

4. The tube laser welding machine of claim 1, wherein: The bent pipe feeding mechanism comprises a bent pipe feeding channel and a bent pipe feeding manipulator, the bent pipe feeding channel comprises a linear vibration disc and a back plate which supports the standing of the bent pipe, and the back plate is arranged in the linear vibration disc along the conveying direction; The bent pipe feeding manipulator can lift and translate to feed a bent pipe to the upper end of the joint.

5. The tube laser welding machine of claim 4, wherein: The front end of the linear vibration disc is further provided with a baffle, a positioning plate, an upper pressing plate and a lower top plate, the baffle blocks the bent pipe conveyed in a limited manner, the upper pressing plate and the lower top plate are respectively arranged above and below the linear vibration disc in a liftable manner, an opening is arranged on the linear vibration disc for the lower top plate to pass through, the upper pressing plate and the lower top plate cooperate with each other to clamp and lift the bent pipe, and the positioning plate is movably arranged.

6. The tube laser welding machine of claim 4 or 5, wherein: The bent pipe feeding manipulator comprises a material taking head which is arranged in a half-opened and half-closed manner, the material taking head can be inserted into and tensioned to the upper end of the bent pipe, and a positioning fork plate is movably arranged on the back side of the corresponding bent pipe.

7. The tube laser welding machine of claim 1, wherein: The discharging mechanism is further provided with a bent pipe air tightness detection mechanism on the discharging path.

8. The tube laser welding machine of claim 7, wherein: The bent pipe air tightness detection mechanism comprises upper and lower positioning seats and a positioning block, the upper end of the bent pipe is inserted into the upper positioning seat, an upper sealing block is arranged in the upper positioning seat, the upper sealing block can be movably attached to the upper end of the bent pipe, the lower end of the bent pipe is inserted into the lower positioning seat, a lower sealing block is arranged in the lower positioning seat, the lower sealing block can be movably attached to the lower end of the bent pipe, the positioning block is movably arranged on the back side of the bent pipe, a positioning groove is arranged on the positioning block, the positioning groove is matched with the bent pipe, and the lower end of the positioning block is limitedly matched with the upper end of the joint; a gas pipe joint of an air tightness detector is arranged on the upper sealing block or the lower sealing block.

9. The tube laser welding machine of claim 7, wherein: The discharging mechanism comprises a first discharging manipulator, a second discharging manipulator and a discharging hopper, the first discharging manipulator can lift and translate to transfer the completed elbow pipe to the elbow pipe air tightness detection mechanism, the second discharging manipulator can lift and translate to transfer the air tightness qualified elbow pipe to the discharging hopper or the air tightness unqualified elbow pipe to the waste material inlet.

10. The tube laser welding machine of claim 9, wherein: The discharging hopper is movably arranged, and when the discharging hopper receives the qualified signal of the air tightness detector, the discharging hopper is moved to above the waste material inlet.

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