CN108581204A - A kind of test integrated device of the laser welding of condenser pipe - Google Patents

Abstract

The invention provides an integrated device for laser welding and testing of condensation pipes, which includes a laser processing head, a multi-degree-of-freedom manipulator, a robot positioning frame, a drying component, a lifting profiling fixture component, an air blowing component, a water tank component, a workpiece and a working platform; the laser processing head is installed on the multi-degree-of-freedom manipulator, and its movement is controlled by the multi-degree-of-freedom manipulator; the multi-degree-of-freedom manipulator is installed on the robot positioning frame; the lifting profiling fixture assembly is arranged in the through-through slot of the workbench; The lifting profiling fixture assembly includes a moving positioning block, a mold groove mounting plate, a profiling mold groove, a pressure plate, two ball lock shaft sets, a positioning sleeve mounting plate and two linear bearings; the profiling mold groove is fixedly arranged in the mold groove In the rectangular groove of the mounting plate, a profiling groove matching the outer contour of the U-shaped pipe is arranged on the profiling die groove. The invention solves the long-standing technical problems of automatic welding and online automatic testing of welding seam quality for such parts, and greatly improves production efficiency.

Description

An integrated device for laser welding and testing of condenser tubes

technical field

The invention belongs to the field of laser processing, and in particular relates to an integrated device for laser welding and testing of condenser tubes.

Background technique

At present, ice cubes are widely used in aquatic products, food, supermarkets, dairy products, medicine, chemistry, vegetable preservation and transportation, marine fishing and other industries. With the development of society and the continuous improvement of people's production levels, more and more industries use ice. The quality requirements for ice are getting higher and higher, and the requirements for high performance, low failure rate and hygiene of ice making equipment are becoming more and more urgent.

An ice maker is a mechanical device that passes water through an evaporator and is cooled by a refrigeration system to make ice. The refrigeration system of the ice machine consists of a compressor, a condenser, a filter drier, an expansion valve capillary and an evaporator. The working principle of the ice machine is that the compressor compresses the low-temperature and low-pressure refrigerant vapor into high-temperature and high-pressure steam, and then discharges it into the condenser. In the condenser, the refrigerant continuously releases heat to the surrounding space and gradually condenses into a low-temperature and high-pressure liquid. These high-pressure liquids flow into the evaporator after throttling and decompressing through the capillary tube of the expansion valve, and continuously vaporize in the evaporator, absorb heat and cool down, become a low-temperature and low-pressure gas, and then return to the compressor through the return pipe to form a refrigeration cycle. At the same time, the water pump sucks the water up from the water tank, the running water freezes on the ice plate, the thickness sensor senses the thickness of the ice and ends the ice making cycle, the condensing fan and water pump stop, and the ice removal cycle starts, the high temperature and high pressure refrigerant vapor discharged by the compressor After entering the evaporator through the solenoid valve, the ice on the surface of the ice plate is melted by heating the evaporator, and the ice slides down into the storage bin by its own gravity, forming a complete ice making and deicing process.

According to the principle and production method of the evaporator, the shape of the ice cubes made by the ice maker is also different. The condenser tube is one of the indispensable accessories in the application process of the evaporator. The condenser tube is mainly composed of a column tube, a U-shaped tube and a spacer, and the three need to be fixed together by welding. The traditional welding method is mainly flame spray welding. During the welding process, it is necessary to continuously swing and rotate the workpiece or move the flame around the workpiece to keep the temperature of the joint surface consistent and reach the welding temperature. Due to the low precision of the welding position of flame spray welding, the weld seam is wide, and defects such as pores and microcracks are prone to occur. The strength of the weld seam is not high, and it is difficult to ensure the sealing of the condenser tube under long-term pressure work, and the welding process is difficult to operate. It is difficult to automate the welding process, and the online automatic test of the subsequent weld quality has not yet been realized.

Contents of the invention

The present invention aims at the deficiencies of the above-mentioned prior art, and provides an integrated device for laser welding and testing of condenser tubes.

The present invention is achieved through the following technical solutions:

An integrated device for laser welding and testing of condensation tubes, including a laser processing head, a multi-degree-of-freedom manipulator, a robot positioning frame, a drying component, a lifting profiling fixture component, an air blowing component, a water tank component, a workpiece, and a workbench;

The laser processing head is installed on a multi-degree-of-freedom manipulator, and its movement is controlled by the multi-degree-of-freedom manipulator; the multi-degree-of-freedom manipulator is installed on a robot positioning frame;

The central position of the workbench is provided with a through-through groove, and the lifting profiling fixture assembly is arranged in the through-through groove, and can move up and down in the vertical direction;

There are two drying components, and the two drying components are symmetrically installed on the workbench; the drying components include a dryer, a positioning sleeve, a double-ear positioning frame, a locking bolt handle, a stepping motor and an electric motor. Turntable; the dryer and the positioning sleeve are coaxially fastened and assembled, the upper end of the positioning sleeve is cylindrical, the lower end is U-shaped and has a through hole for coaxial cooperation with the double-ear positioning frame, the The locking bolt handle is used to lock the positioning sleeve on the double-ear positioning frame; the stepping motor is used to drive the electric turntable, and the double-ear positioning frame is set on the electric turntable, which is driven by the electric turntable to rotate;

The lifting profiling fixture assembly includes a moving positioning block, a mold groove mounting plate, a profiling mold groove, a pressure plate, two ball lock shaft sets, a positioning sleeve mounting plate and two linear bearings;

The mold groove mounting plate is convex, with a rectangular groove in the middle, and positioning grooves and mounting holes symmetrically distributed on the left and right sides; two linear bearings are respectively installed in the left and right mounting holes;

There are grooves and stepped grooves on the front end of the mold groove mounting plate, and the mobile positioning block is mounted on the mold groove mounting plate through the cooperation with the groove and the stepped groove;

The profiling die groove is fixedly arranged in the rectangular groove of the die groove mounting plate, and the profiling die groove is provided with a profiling groove matching the outer contour of the U-shaped pipe;

The pressing plate is used to press and fix the condensation pipe workpiece and the profiling groove; the two sides of the pressing plate are provided with through holes, which are used to coaxially cooperate with the two ball lock shaft sets respectively;

The ball lock shaft kit includes a ball lock shaft, a positioning sleeve and a front receiving sleeve. The positioning sleeve is installed on the positioning sleeve mounting plate, and the front receiving sleeve is installed in the positioning groove. The ball locking shaft passes through the pressing plate, the positioning sleeve and the setting The front directly below it accepts the fixed assembly of the sleeve, and then fixes the U-shaped tube in the profiling groove in the profiling die groove through the pressing plate;

The water tank assembly is arranged under the lifting profiling fixture assembly; the water tank assembly includes a water tank, a guide rod, a sealing guide sleeve and a lifting cylinder; The table tops of the table are fixed together; the open end of the water tank should be able to surround the outer contour of the lifting profiling fixture assembly, so that the lifting profiling fixture assembly can just immerse in the water tank when it moves downward;

The guide rods are a pair, which are coaxially installed with the two linear bearings in the lifting profiling fixture assembly respectively; the lifting cylinder is arranged outside the bottom of the water tank, and the piston rod of the lifting cylinder passes through the bottom surface of the water tank upwards to contact with the lifting cylinder. The mold groove mounting plate of the profiling fixture assembly is fixed; the sealing guide sleeve is installed on the upper surface of the bottom of the water tank, and is coaxially assembled with the piston rod of the lifting cylinder;

The air path guide assembly includes a guide cylinder, a guide cylinder mounting plate, quick insertion, an air path adapter block and an air nozzle. The guide cylinder is positioned on the workbench through the guide cylinder mounting plate, and the piston rod of the guide cylinder and the air path adapter block The assembly is realized through threads. There is an arc-shaped through-hole inside the gas circuit adapter block, and the two sides of the arc-shaped through-hole are respectively equipped with a quick plug and an air nozzle.

The present invention has following beneficial effect:

1. According to the special structural principle of the U-shaped condenser tube, the core component of the evaporator, the present invention designs the precision component assembly of the U-shaped tube, column tube, and separator, the clamping of the profiling welding station, and the air tightness and limit of the online weld seam. The integrated method and device for laser welding and testing of pressure testing and online welding defect repair have realized the integration of U-shaped condenser tubes, automatic laser welding and testing, and online welding defect repair. It is easy to operate and solves the problem of such parts For a long time, the technical problems of automatic welding and online automatic testing of weld quality have greatly improved production efficiency and have excellent economic benefits.

2. According to the particularity of the evaporator structure and the requirements of the welding process, the present invention optimizes the design of the gas path guide assembly, introduces gas such as N ₂ or Ar ₂ from the outside, and introduces the gas into the U-shaped tube through the gas path adapter block and the gas nozzle Among them, the protection gas blowing from the inside can prevent the oxidation of the welding process and ensure the good metallurgical effect of the welding pool; the design of the U-shaped tube pressurization can effectively control the weld formation of such thin-walled parts, avoiding the welding seam Collapse; the U-shaped tube flow airflow design accelerates the cooling of the welding part during the welding process, and the other parts are well preheated, which greatly reduces the temperature inhomogeneity and reduces the welding thermal stress deformation.

3. The present invention adopts the same air inlet and outlet settings, which not only realizes the excellent welding process effect described in the second point above, but also realizes online testing of welding quality after welding, online welding defect repair and ultimate pressure bearing capacity Test, one setting for multiple purposes, reduces production cost and improves production efficiency.

4. The present invention uses laser as a welding heat source tool, utilizes the high controllability of laser, and aims at the particularity of the evaporator structure and welding process requirements, adopts a variable parameter welding method in the welding process, when the optical path is close to the spacer, column tube, At the junction of the three U-shaped tubes, the laser power increases; at other positions, the laser power becomes normal. Through such variable parameter welding, the three bodies are welded at the same time; the laser welding has high precision, narrow weld seam, and high strength, which solves the problem. The shortcomings of traditional welding methods in this regard are overcome. The bonding strength of the separator and the column tube can also be greatly enhanced by supplementary laser welding of the assembly contact surface of the separator and the column tube.

5. The present invention designs a lifting profiling fixture assembly with the same profile as the bottom of the U-shaped tube. The contact surface between the profiling die groove and the U-shaped tube is a wear-resistant smooth ceramic surface. On the one hand, it is set in this way to prevent the lifting profiling fixture The contact surface of the component is worn and durable. On the other hand, the bonding and thermal deformation of the contact surface between the U-shaped tube and the groove will not occur due to heat conduction in the welding area, which solves the problem of difficult disassembly of the welding fixture of the traditional condensation tube workpiece.

Description of drawings

Fig. 1 is the structural diagram of condensation tube;

Fig. 2 is the structural diagram of column tube and spacer;

Fig. 3 is the overall structural diagram of the integrated device for laser welding and testing;

Fig. 4 is a structural diagram of the laser processing head;

Fig. 5 is a structural diagram of the lifting profiling fixture assembly;

Fig. 6 is the structural diagram of moving positioning block;

Fig. 7 is the structural diagram of die groove mounting plate;

Fig. 8 is the structural diagram of profiling die groove;

Figure 9 is a structural diagram of the ball lock shaft kit after installation;

Figure 10 is a structural diagram of the drying assembly;

Figure 11 is a structural diagram of a positioning sleeve;

Fig. 12 is a structural diagram of an air blowing assembly;

Figure 13 Structural diagram of the sink assembly.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1-13, the condensation tube 8 of the present invention is composed of a U-shaped tube 802 and a plurality of column tubes 801; the column tube 801 is a cylindrical structure with a hollow interior, a closed end and an open end. The wall thickness is 0.2mm-2mm, and a separator 803 is arranged in the middle of the column tube 801, thereby dividing the internal space of the column tube 801 into two parts; The inner diameter of the spacer is 0.005mm to 0.05mm larger, that is, when the length direction of the separator 803 is assembled along the axial direction of the column tube 801 (that is, the width direction of the separator 803 is parallel to the radial direction of the column tube 801), the two sides of the length direction It is a tight interference fit with the tube wall of the column tube 801; there is a gap for gas or liquid to flow between the top of the spacer 803 and the top (closed end) of the column tube 801, and the bottom of the spacer 803 The end is arc-shaped and consistent with the internal radial profile of the U-shaped tube 802, that is, when the bottom end (open end) of the column tube 801 that has been equipped with the spacer 803 is assembled with the U-shaped tube 802, the spacer of the column tube 801 803 just closes the pipeline of U-shaped pipe 802, forcing the air flow or liquid flow flowing in U-shaped pipe 802 to flow through the gap between the top of separator 803 and the top (closed end) of column pipe 801 to reach separator 803 In the U-shaped pipe 802 pipeline on the other side;

The U-shaped tube 802 is hollow inside, and the tube wall thickness is 0.2 mm to 2 mm. The two ends of the U-shaped tube are respectively provided with an air inlet 804 and an exhaust port 805; the upper surface of the U-shaped tube 802 is provided with a plurality of column tube mounting holes. , the number of holes is consistent with the number of column tubes 801, and the diameter of the column tube installation holes is 0.005 mm to 0.05 mm smaller than the outer diameter of the column tube 801, so that each column tube installation hole is inserted into a column equipped with a separator 803 Tube 801 (open end inserted), both interference fit. The purpose of the method and device of the present invention is to connect and fix the U-shaped tube 802 and a plurality of column tubes 801 , and the column tube 801 and the separator 803 together by laser welding.

The invention provides a method for integrating laser welding and testing of condenser tubes, which specifically includes the following steps:

1) According to the component structure and assembly principle of the condenser tube 8 as described above, the U-shaped tube 802 with N column tube mounting holes, N column tubes 801, and N spacers 803 are assembled to form a condensation tube to be welded. Tube workpiece; N is an even number greater than 2;

The assembly requires that the separator 803 be self-sustaining and able to withstand the airflow during subsequent work without changing the assembly orientation; it is required that the plane where the separator 803 in the column tube assembly is located is perpendicular to the axis of the U-shaped tube 802;

2) placing the condensing tube workpiece to be welded on the lifting profiling fixture assembly 5 for clamping and fixing;

The lifting profiling fixture assembly 5 is provided with a profiling groove 5031 matching the outer contour of the U-shaped pipe 802, and is provided with a pressing plate 504 for pressing and fixing the condensation tube workpiece and the profiling groove 5031; The contact surface between the U-shaped groove 5031 and the U-shaped pipe 802 is a wear-resistant smooth ceramic surface. On the one hand, this setting can prevent the contact surface of the lifting profiling fixture assembly from being worn and durable, and on the other hand, U The bonding and thermal deformation of the contact surface between the shaped tube 802 and the groove make it easier to assemble and disassemble the workpiece of the condenser tube.

3) Pass protective gas (such as _N2 , etc.) into the U-shaped tube 802 from one open end (air inlet) of the U-shaped tube 802 of the clamped and fixed condensing tube workpiece, and the other open end (exhaust gas) port) is open; the flow and pressure requirements of the shielding gas will not cause the separator 803 to be displaced.

4) Move the laser processing head to the joint between any column tube 801 and U-shaped tube 802 (that is, the profile of the column tube installation hole);

5) Adjust the spatial orientation and posture of the laser processing head so that the laser beam output by the laser processing head is incident and focused on the surface of the seam at a certain angle (the angle between the beam and the axis of the column tube 801 is between 1 and 60 degrees); The welding laser beam is output, and the movement of the laser processing head is controlled by a multi-degree-of-freedom manipulator, so that the focused laser beam scans a circle along the joint position of the U-shaped tube 802 and the column tube 801, that is, a complete circular weld is formed along the contour of the column tube installation hole. During the scanning process, adjust the laser power in real time. When scanning to the position of the separator 803, increase the laser power (increase by 10% to 50%); after scanning, the U-shaped tube 802, the separator 803 and the column tube 801 three to achieve fusion welding, so as to obtain laser ring welding seam;

Preferably, the movement of the laser processing head can be controlled by a multi-degree-of-freedom manipulator, so that the laser beam output by the laser processing head is at a certain angle (the angle between the beam and the axis of the column tube 801 is between 1 and 60 degrees), along the separator 803 and The assembly contact line of the column tube 801 (that is, the two length sides of the spacer 803) is scanned (the laser beam is focused on the outer wall of the column tube 801 during the scanning process), so that the spacer 803 and the column tube 801 are closely fused Welding; because the working principle of the condensation pipe 8 does not require the assembly contact surface of the separator 803 and the column pipe 801, and the assembly contact surface of the separator 803 and the U-shaped pipe 802 to maintain an absolute seal, so this operation is only as preferred, and can be Greatly enhance the bonding strength of the separator and the column tube.

6) Move the laser processing head to the seam between the next unwelded column tube 801 and the U-shaped tube 802;

7) Repeat step 5) to step 6) until the welding of all column tubes 801 and U-shaped tubes 802 is completed;

8) Through the automatic lifting device, immerse the welded condenser pipe workpiece in water, cool it rapidly, and close its exhaust port, apply standard test air pressure to the air inlet, and test its airtightness under the standard test air pressure. When missing solder joints (with air bubbles) are found, record the position of the missing solder joints and enter step 9); otherwise, proceed to step 10);

Preferably, if no solder leaks are found in this step, it is also possible to continuously increase the input gas pressure of the air inlet until the condensation pipe is deformed or a new bubble escape point appears, and the ultimate pressure bearing capacity of the condensation pipe after welding can be detected sequentially .

9) Through the automatic lifting device, the condensation pipe is automatically raised from the water and exposed. After drying with hot air, the laser processing head is controlled by the manipulator to move to the position of the missing solder joint, and the welding laser beam is output to weld the missing solder joint. After the welding is completed, Go to step 8);

10) Use the automatic lifting device to lift the condensation pipe out of the water, dry it with hot air, loosen the pressure plate of the lifting profiling fixture assembly, remove the condensation pipe workpiece, and complete the welding and testing process of the condensation pipe.

The present invention provides an integrated device for laser welding and testing of condensation tubes, which includes a laser processing head 1, a multi-degree-of-freedom manipulator 2, a robot positioning frame 3, a drying component 4, a lifting profiling fixture component 5, an air blowing component 6, Sink assembly 7, workpiece 8 and workbench 9.

The laser processing head 1 is installed on a multi-degree-of-freedom manipulator 2, and its movement is controlled by the multi-degree-of-freedom manipulator 2. The multi-degree-of-freedom manipulator 2 is installed on a robot positioning frame 3 .

A through-through slot is provided at the center of the workbench 9, and the lifting profiling fixture assembly 5 is disposed in the through-through slot, and can move vertically up and down.

There are two drying assemblies 4, and the two drying assemblies 4 are symmetrically installed on the workbench 9; the drying assemblies 4 include a dryer 401, a positioning sleeve 402, a double-ear positioning frame 403, and locking bolts Handle 404, stepper motor 405 and electric turntable 406. The dryer 401 is coaxially fastened and assembled with the positioning sleeve 402, the upper end of the positioning sleeve 402 is cylindrical, the lower end is U-shaped and has a through hole for coaxial cooperation with the binaural positioning frame 403, Then the positioning sleeve 402 is locked on the binaural positioning frame 403 with a certain angle by the locking bolt handle 404; The turntable 406 drives it to rotate.

The lifting profiling fixture assembly 5 includes a moving positioning block 501 , a mold groove mounting plate 502 , a profiling mold groove 503 , a pressing plate 504 , two ball lock shaft sets 505 , a positioning sleeve mounting plate 506 and two linear bearings 507 .

The mold cavity mounting plate 502 is in a convex shape, with a rectangular groove 5021 in the middle, and positioning grooves 5022 and mounting holes 5023 symmetrically distributed on the left and right sides. The two linear bearings 507 are respectively installed in the left and right installation holes 5023 .

A groove 5024 and a stepped groove 5025 are formed on the front end of the mold cavity mounting plate 502 , and the mobile positioning block 501 is snapped onto the mold cavity mounting plate 502 through cooperation with the groove 5024 and the stepped groove 5025 .

The profiling die groove 503 is fixedly arranged in the rectangular groove 5021 of the die cavity mounting plate 502 , and the profiling die groove 503 is provided with a profiling groove 5031 matching the outer contour of the U-shaped pipe 802 .

The pressing plate 504 is used to press and fix the condenser tube workpiece and the profiling groove. Two sides of the pressing plate 504 are provided with through holes, which are used for coaxial cooperation with two ball lock shaft sets 505 respectively.

The ball lock shaft kit 505 includes a ball lock shaft 5051, a positioning sleeve 5052 and a front receiving sleeve 5053, the positioning sleeve 5052 is installed on the positioning sleeve mounting plate 506, the front receiving sleeve 5053 is installed in the positioning groove 5022, and the ball lock shaft 5051 is in turn After passing through the pressing plate 504 and the positioning sleeve 5052, it is fixedly assembled with the front receiving sleeve 5053 directly below it, and then the U-shaped pipe 802 is fixed in the profiling groove in the profiling die groove 503 through the pressing plate 504 .

The water tank assembly 7 is arranged below the lifting profiling fixture assembly 5 . The water tank assembly 7 includes a water tank 701 , a guide rod 702 , a sealing guide sleeve 703 and a lift cylinder 704 . The open end of described water tank 701 is arranged on the through groove below of workbench 9, and is fixed together with the table top of workbench 9; The shape clamp assembly 5 just can be immersed in the water tank 701 when moving downward.

The guide rods 702 are a pair, which are coaxially installed with the two linear bearings 507 in the lifting profiling fixture assembly 5 respectively. The lifting cylinder 704 is arranged outside the bottom of the water tank 701 , and the piston rod of the lifting cylinder 704 passes through the bottom surface of the water tank 701 and is fixed upwardly with the cavity mounting plate 502 of the lifting profiling fixture assembly 5 . The sealing guide sleeve 703 is installed on the upper surface of the bottom of the water tank 701 and coaxially assembled with the piston rod of the lifting cylinder 704 to prevent water from entering the cylinder.

The air path guide assembly 6 includes a guide cylinder 601, a guide cylinder mounting plate 602, a quick plug 603, an air path adapter block 604, and an air nozzle 605. The guide cylinder 601 is positioned on the workbench 9 through the guide cylinder mounting plate 602, and the guide cylinder The piston rod of 601 is assembled with the air passage adapter block 604 through threads. The air passage adapter block 604 is provided with an arc-shaped through hole inside, and the two sides of the arc-shaped through hole are respectively provided with a quick plug 603 and an air nozzle 605.

The specific working process of the laser welding and testing integrated device of the condensation tube of the present invention is as follows:

Place the condensing tube 8 to be welded in the profiling groove 5031 in the profiling die groove 503, pass through the pressure plate 504 and the positioning sleeve 5052 through the ball lock shaft 5051 and fix it with the front receiving sleeve 5053 directly below, so that the U The shaped pipe 802 is fixedly clamped in the profiling die groove 503 .

Start the gas path guide assembly 6, pass into the U-shaped pipe 802 from an open end (air inlet 804) of the U-shaped pipe 802 of the clamped and fixed condensing tube workpiece (such as N2 etc.), and the other The open end (exhaust port 805) is open; the flow and pressure requirements of the shielding gas will not cause the separator 803 to be displaced.

Start the multi-degree-of-freedom manipulator 2, and move the laser processing head 1 to the joint between any column tube 801 and U-shaped tube 802 (that is, the profile of the column tube installation hole); adjust the spatial orientation and posture of the laser processing head so that the laser processing The laser beam output by the head is incident and focused on the surface of the seam at a certain angle (the angle between the beam and the axis of the column tube 801 is between 1 and 60 degrees); the welding laser beam is output, and the laser processing head is controlled by the multi-degree-of-freedom manipulator 2 Move so that the focused laser beam scans a circle along the joint position of the U-shaped tube 802 and the column tube 801, that is, a complete annular weld is formed along the contour of the column tube installation hole; during the scanning process, the laser power is adjusted in real time. When the separator 803 is at the position, increase the laser power (increase by 10% to 50%); after the scanning is completed, the U-shaped tube 802, the separator 803 and the column tube 801 are melted and welded to obtain a laser ring weld ;

Move the laser processing head to the seam of the next unwelded column tube 801 and U-shaped tube 802; repeat step 5) to step 6), until the welding of all column tubes 801 and U-shaped tubes 802 is completed;

Control the action of the lifting cylinder 704 to make the lifting profiling fixture assembly 5 move downward, automatically immerse the welded condensation tube workpiece in the water tank 701, cool it rapidly, and close the exhaust port 805, and apply standard tests to the air inlet 804 Air pressure, test its airtightness under the standard test air pressure, when leaking solder joints (where there are bubbles) are found, record the position of the solder joint leaks; otherwise, control the lifting cylinder 704 to move the lifting profiling fixture assembly 5 upwards , so that the condensation pipe is automatically raised from the water, start the drying assembly 4 to blow out hot air, and after the condensation pipe workpiece is dried, loosen the pressure plate in the lifting profiling fixture assembly 5, remove the condensation pipe workpiece, and complete the welding of the condensation pipe and testing process.

It will be obvious to those skilled in the art that the present invention may be modified in various ways and such modifications are not to be regarded as departing from the scope of the present invention. All such modifications obvious to those skilled in the art are intended to be included within the scope of this claim.

Claims (1)

1. A laser welding and testing integrated device for condensation tubes, characterized in that it comprises a laser processing head (1), a multi-degree-of-freedom manipulator (2), a robot positioning frame (3), a drying assembly (4), a lifting imitation Shaped fixture assembly (5), blowing assembly (6), sink assembly (7), workpiece (8) and workbench (9); The laser processing head (1) is installed on the multi-degree-of-freedom manipulator (2), and its motion is controlled by the multi-degree-of-freedom manipulator (2); the multi-degree-of-freedom manipulator (2) is installed on the robot positioning frame (3); The central position of the workbench (9) is provided with a through-through groove, and the lifting profiling fixture assembly (5) is arranged in the through-through groove, and can move up and down in the vertical direction; There are two drying assemblies (4), and the two drying assemblies (4) are symmetrically installed on the workbench (9); the drying assemblies (4) include a dryer (401), a positioning sleeve ( 402), double-ear positioning frame (403), locking bolt handle (404), stepping motor (405) and electric turntable (406); fixed assembly, the upper end of the positioning sleeve (402) is cylindrical, the lower end is U-shaped and has a through hole for coaxial cooperation with the double-ear positioning frame (403), and the locking bolt handle (404) is used To lock the positioning sleeve (402) on the binaural positioning frame (403); the stepper motor (405) is used to drive the electric turntable (406), and the binaural positioning frame (403) is arranged on the electric turntable (406) , driven by the electric turntable (406) to rotate; The lifting profiling fixture assembly (5) includes a mobile positioning block (501), a mold groove mounting plate (502), a profiling mold groove (503), a pressing plate (504), two ball lock shaft sets (505), a positioning Set the mounting plate (506) and two linear bearings (507); The mold cavity mounting plate (502) is convex, with a rectangular groove (5021) in the middle, positioning grooves (5022) and mounting holes (5023) symmetrically distributed on the left and right sides; two linear bearings (507) are respectively installed In the left and right mounting holes (5023); Groove (5024) and stepped groove (5025) are opened on the front end of the mold groove mounting plate (502), and the mobile positioning block (501) is mounted on the mold groove through cooperation with the groove (5024) and the stepped groove (5025). on the board (502); The profiling die groove (503) is fixedly arranged in the rectangular groove (5021) of the die groove mounting plate (502), and the profiling die groove (503) is provided with a The profiling groove (5031); The pressing plate (504) is used to press and fix the condensation tube workpiece and the profiling groove (5031); the two sides of the pressing plate (504) are provided with through holes for respectively connecting with two ball lock shaft sets (505) coaxial fit; The ball lock shaft kit (505) includes a ball lock shaft (5051), a positioning sleeve (5052) and a front receiving sleeve (5053), the positioning sleeve (5052) is installed on the positioning sleeve mounting plate (506), and the front receiving sleeve ( 5053) is installed in the positioning groove (5022), the ball lock shaft (5051) passes through the pressure plate (504) and the positioning sleeve (5052) in sequence, and then is fixedly assembled with the front receiving sleeve (5053) arranged directly below it, and then passes through the pressure plate (504) fixing the U-shaped pipe (802) in the profiling groove in the profiling die groove (503); The water tank assembly (7) is arranged below the lifting profiling fixture assembly (5); the water tank assembly (7) includes a water tank (701), a guide rod (702), a sealing guide sleeve (703) and a lifting cylinder (704 ); the open end of the water tank (701) is arranged below the through groove of the workbench (9), and is fixed together with the table top of the workbench (9); The external contour of the fixture assembly (5) makes the lifting profiling fixture assembly (5) just able to immerse in the water tank (701) when it moves downward; The guide rods (702) are a pair, which are installed coaxially with the two linear bearings (507) in the lifting profiling fixture assembly (5) respectively; the lifting cylinder (704) is arranged at the bottom of the water tank (701) On the outside, the piston rod of the lifting cylinder (704) passes through the bottom surface of the water tank (701) and is fixed upwards with the die groove mounting plate (502) of the lifting profiling fixture assembly (5); the sealing guide sleeve (703) is installed in the water tank (701) bottom upper surface, and coaxial assembly with the piston rod of lift cylinder (704); The air path guide assembly (6) includes a guide cylinder (601), a guide cylinder mounting plate (602), a quick plug (603), an air path adapter block (604) and an air nozzle (605), and the guide cylinder (601) passes through The guide cylinder mounting plate (602) is positioned on the workbench (9), and the piston rod of the guide cylinder (601) is assembled with the air passage adapter block (604) through threads, and the air passage adapter block (604) is provided with an arc The two sides of the arc-shaped through-hole are respectively equipped with a quick plug (603) and an air nozzle (605).