Expansion valve laser welding device

Abstract

The utility model provides an expansion valve laser welding device which comprises a machine base, a first containing base, a second containing base, a laser welding piece and a driving mechanism, the first containing base and the second containing base are horizontally arranged in the Y-axis direction and used for containing a valve body and a temperature sensing bulb respectively, and the laser welding piece is located above the machine base and connected with the driving mechanism. The driving mechanism can drive the laser welding piece to be fed in the X-axis direction, the Y-axis direction and the Z-axis direction, and two rotating mechanisms capable of driving the first containing base and the second containing base to rotate in the Z-axis direction are further arranged on the machine base. The valve body and the temperature sensing bulb can be rapidly positioned through the first placing seat and the second placing seat, rapid automatic welding is realized by adopting three-axis driving to be matched with the rotating mechanism, the welding efficiency can be greatly improved, and the labor cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning expansion valve processing equipment, in particular to a laser welding device for an expansion valve. Background Art

[0002] The expansion valve is a crucial component in refrigeration systems, typically installed between the reservoir and the evaporator. It throttles medium-temperature, high-pressure liquid refrigerant through its throttle valve, converting it into low-temperature, low-pressure wet vapor. The refrigerant then absorbs heat in the evaporator, achieving the desired cooling effect. The expansion valve controls the flow rate by adjusting the superheat at the end of the evaporator, preventing underutilization of the evaporator area and cylinder knocking.

[0003] When manufacturing an expansion valve, the temperature-sensing bulb needs to be welded to the diaphragm of the pump body through a capillary tube. The existing connection method usually uses manual welding to weld the capillary tube to the diaphragm and the temperature-sensing bulb respectively. This welding method is cumbersome and difficult to quickly position the valve body and the temperature-sensing bulb, resulting in poor welding efficiency. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an expansion valve laser welding device to solve the problems in the prior art of difficulty in quickly positioning the valve body and the temperature sensor and low welding efficiency.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the present invention provides an expansion valve laser welding device, including a machine base, a first placement seat, a second placement seat, a laser welding part, and a driving mechanism. The first placement seat and the second placement seat are horizontally arranged along the Y-axis direction, and are respectively used to place the valve body and the temperature sensing package. The laser welding part is located above the machine base and connected to the driving mechanism. The driving mechanism can drive the laser welding part to feed along the X-axis, Y-axis, and Z-axis directions respectively. The machine base is also provided with two rotating mechanisms that can respectively drive the first placement seat and the second placement seat to rotate around the Z-axis direction.

[0006] By adopting the above technical solution, the valve body and the temperature-sensitive bulb can be placed in the first placement seat and the second placement seat respectively, and then the laser welding part can be driven by the driving mechanism to move its welding end to the welding point of the valve body or the temperature-sensitive bulb, and then the capillary tube is welded to the temperature-sensitive bulb and the diaphragm on the valve body in conjunction with the rotating mechanism. The valve body and the temperature-sensitive bulb can be quickly positioned through the first placement seat and the second placement seat, and a three-axis drive is used in conjunction with the rotating mechanism to realize rapid and automated welding, which can greatly improve welding efficiency and reduce labor costs.

[0007] In one embodiment of the present invention, the first placement seat includes a sleeve inserted into the valve body from top to bottom, a through groove provided on the side wall of the sleeve and adapted to the valve body port, and a first connecting shaft provided on the lower side of the first sleeve and connected to the rotating mechanism.

[0008] By adopting the above technical solution, the valve body can be inserted into the sleeve from top to bottom, and the multiple ports of the valve body can be positioned through the through grooves on the side wall of the sleeve, which makes it easier for the staff to quickly place the valve body in the sleeve and quickly position it.

[0009] In one embodiment of the present invention, the second placement seat includes a base, a socket provided on the base for inserting the temperature sensor, and a second connecting shaft provided on the lower side of the base for connecting to the rotating mechanism.

[0010] By adopting the above technical solution, the temperature sensing package can be quickly inserted into the socket on the base, and the temperature sensing package can be quickly plugged in and positioned.

[0011] In one embodiment of the present invention, the driving mechanism includes a Y-axis slide rail arranged on the machine base along the Y-axis direction, an X-axis slide rail slidably connected to the Y-axis slide rail and arranged along the X-axis direction, a Z-axis slide rail arranged along the Z-axis direction and slidably connected to the X-axis slide rail, and a connecting arm slidably connected to the Z-axis slide rail and connected to the laser welding part. It also includes a Y-axis linear motor arranged on the Y-axis slide rail to drive the X-axis slide rail to move along the Y-axis direction, an X-axis linear motor arranged on the X-axis slide rail to drive the Z-axis slide rail to move along the X-axis, and a Z-axis linear motor arranged on the Z-axis slide rail to drive the connecting arm to move along the Z-axis direction.

[0012] By adopting the above technical solution, the driving mechanism is connected to the laser welding part through the connecting arm, and the three driving parts of the X-axis linear motor, Y-axis linear motor and Z-axis linear motor can respectively enable the laser welding part to achieve feeding in the X, Y and Z directions, thereby meeting the positioning and movement of the valve body and the temperature sensing package welding point.

[0013] In one embodiment of the present invention, the rotating mechanism includes a driving motor arranged on a machine base, a reduction gearbox arranged at the output end of the driving motor, and a three-jaw chuck arranged at the output end of the reduction gearbox. The three-jaw chuck is arranged in a vertical direction, and the first connecting shaft or the second connecting shaft is plugged into the three-jaw chuck.

[0014] By adopting the above technical solution, the first connecting shaft or the second connecting shaft can be clamped by the three-jaw chuck, and then the three-jaw chuck is driven to rotate by the drive motor and the reduction gearbox, thereby driving the first placement seat or the second placement seat to rotate.

[0015] In one embodiment of the present invention, a first clamping assembly capable of clamping the valve body is further provided on the first placement seat, and the first clamping assembly includes a first support plate fixedly provided on the bottom plate of the sleeve, a pressure plate provided on the upper side of the sleeve and capable of clamping the valve body from top to bottom, and a quick clamp provided on the first support plate to drive the displacement of the pressure plate, the pressure plate has a positioning hole corresponding to the axis of the valve body, and a clearance groove connected to the positioning hole is provided on the pressure plate.

[0016] By adopting the above technical solution, after the valve body is placed in the sleeve, the valve body in the sleeve can be pressed and fixed by the first pressing component, and the quick clamp method can be used to quickly press the pressure plate to the upper side of the valve body, and the positioning hole on the upper side of the valve body is aligned with the valve body, and then by providing a clearance groove, the capillary can be placed in the clearance groove for welding.

[0017] In one embodiment of the present invention, a second pressing assembly capable of pressing the temperature-sensitive bag is further provided on the second placement seat, and the second pressing assembly includes a second support plate fixedly provided on the lower side of the base, a slide groove provided on the base and connected to the socket, a slider slidably connected to the slide groove and capable of pressing the side wall of the temperature-sensitive bag, and an elbow clamp provided on the second support plate to drive the displacement of the slider, and also includes a contact block fixedly provided on the upper end of the base and capable of pressing the temperature-sensitive bag, and the contact surface of the contact block is set to an arc surface adapted to the temperature-sensitive bag.

[0018] By adopting the above technical solution, the second pressing component can press the side wall of the temperature-sensing package, so that the temperature-sensing package is fixedly connected to the base, ensuring that the displacement of the temperature-sensing package will not be offset during rotational welding.

[0019] In one embodiment of the present invention, a positioning assembly capable of positioning the center of the upper end of the valve body is also provided next to the first placement seat. The positioning assembly includes a column provided next to the first placement seat, a flip plate rotatably connected to the upper end of the column, a positioning pin provided at the end of the flip plate to contact the center point of the positioning valve body, and a limit block provided on the column to limit the flip angle of the flip plate.

[0020] By adopting the above technical solution, the center point of the valve body can be positioned by the positioning pin to ensure the accuracy of welding.

[0021] As described above, the expansion valve laser welding device of the present invention has the following beneficial effects: the valve body and the temperature-sensitive bulb can be placed in the first placement seat and the second placement seat respectively, and then the laser welding part is driven by the driving mechanism to move its welding end to the welding point of the valve body or the temperature-sensitive bulb, and then the capillary tube is welded to the temperature-sensitive bulb and the diaphragm on the valve body in conjunction with the rotating mechanism. The valve body and the temperature-sensitive bulb are quickly positioned through the first placement seat and the second placement seat, and a three-axis drive is used in conjunction with the rotating mechanism to realize rapid and automated welding, which can greatly improve welding efficiency and reduce labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shown is a schematic diagram of the overall structure disclosed in the embodiment of the present utility model;

[0023] Figure 2 Shown is a schematic structural diagram of the driving mechanism disclosed in an embodiment of the present utility model;

[0024] Figure 3 Shown is a structural schematic diagram of the first clamping assembly disclosed in an embodiment of the present utility model.

[0025] Component number description

[0026] 1. Machine base; 2. First placement seat; 3. Second placement seat; 4. Valve body; 5. Temperature sensor; 6. Laser welding part; 7. Driving mechanism; 8. Rotating mechanism; 9. First clamping assembly; 10. Second clamping assembly; 11. Positioning assembly;

[0027] 20. Sleeve; 21. Through slot;

[0028] 30. Base;

[0029] 40. Y-axis slide rail; 41. X-axis slide rail; 42. Z-axis slide rail; 43. Connecting arm; 44. Y-axis linear motor; 45. X-axis linear motor; 46. Z-axis linear motor;

[0030] 50. Drive motor; 51. Reducer; 52. Three-jaw chuck;

[0031] 60. First support plate; 61. Press plate; 62. Quick clamp; 63. Positioning hole; 64. Clearance groove;

[0032] 70. Second support plate; 71. Slide; 72. Slider; 73. Toggle clamp; 74. Contact block;

[0033] 80. Column; 81. Flip plate; 82. Positioning pin; 83. Limit block. DETAILED DESCRIPTION

[0034] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0035] See also Figures 1 to 3. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of this utility model. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by this utility model without affecting the efficacy and purpose that can be achieved by this utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this utility model without substantially changing the technical content.

[0036] like Figure 1 As shown, the utility model provides an expansion valve laser welding device, including a machine base 1, a first placement seat 2, a second placement seat 3, a laser welding part 6, and a driving mechanism 7. The first placement seat 2 and the second placement seat 3 are horizontally arranged along the Y-axis direction, and are respectively used to place the valve body 4 and the temperature sensing package 5. The laser welding part 6 is located above the machine base 1 and is connected to the driving mechanism 7. The driving mechanism 7 can drive the laser welding part 6 to feed along the X-axis, Y-axis, and Z-axis directions respectively. The machine base 1 is also provided with two rotating mechanisms 8 that can respectively drive the first placement seat 2 and the second placement seat 3 to rotate around the Z-axis direction. The laser welding part 6 is a laser welding gun.

[0037] The valve body 4 and the temperature-sensing bulb 5 can be placed vertically in the first placement seat 2 and the second placement seat 3 respectively, so that the diaphragm of the valve body 4 is located at the upper end of the device and the welding point of the temperature-sensing bulb 5 is located on the upper side. Then, the driving mechanism 7 drives the laser welding part 6 to cooperate with the rotating mechanism 8 to weld the two ends of the capillary to the diaphragm of the valve body 4 and the upper end of the temperature-sensing bulb 5 respectively.

[0038] like Figure 2 As shown, the first placement seat 2 includes a sleeve 20 that is inserted from top to bottom by the valve body 4, a through groove 21 arranged on the side wall of the sleeve 20 and adapted to the port of the valve body 4, and a first connecting shaft arranged on the lower side of the first sleeve 20 and connected to the rotating mechanism 8. The through groove 21 is connected to the upper end of the sleeve 20, and there are multiple ports corresponding to the valve body 4. The through groove 21 can correspond to the multiple ports on the valve body 4, and the first connecting shaft is arranged on the central axis of the sleeve 20.

[0039] The second placement seat 3 includes a base 30, a socket arranged on the base 30 for plugging in the temperature sensing package 5, and a second connecting shaft arranged on the lower side of the base 30 for connecting to the rotating mechanism 8. The base 30 is set to be cylindrical, and the socket is located at the axis of the base 30. The temperature sensing package 5 can be plugged into the socket from top to bottom, and the second connecting shaft is set on the axis of the base 30.

[0040] The driving mechanism 7 includes a Y-axis slide rail 40 arranged on the machine base 1 along the Y-axis direction, an X-axis slide rail 41 slidably connected to the Y-axis slide rail 40 and arranged along the X-axis direction, a Z-axis slide rail 42 arranged along the Z-axis direction and slidably connected to the X-axis slide rail 41, and a connecting arm 43 slidably connected to the Z-axis slide rail 42 and connected to the laser welding part 6. It also includes a Y-axis linear motor 44 arranged on the Y-axis slide rail 40 to drive the X-axis slide rail 41 to move along the Y-axis direction, an X-axis linear motor 45 arranged on the X-axis slide rail 41 to drive the Z-axis slide rail 42 to move along the X-axis, and a Z-axis linear motor 46 arranged on the Z-axis slide rail 42 to drive the connecting arm 43 to move along the Z-axis direction.

[0041] The Y-axis linear motor 44 can drive the X-axis slide 41 to move in the Y-axis direction, thereby realizing the feeding of the laser welding part 6 in the Y-axis direction. Then, the X-axis linear motor 45 can drive the Z-axis slide to move in the X-axis direction, thereby realizing the feeding of the laser welding part 6 in the X-axis direction. Then, the Z-axis linear motor 46 can drive the connecting arm 43 to move in the Z-axis direction, thereby realizing the feeding of the laser welding part 6 in the Z-axis direction.

[0042] The rotating mechanism 8 includes a driving motor 50 arranged on the machine base 1, a reduction gear 51 arranged at the output end of the driving motor 50, and a three-jaw chuck 52 arranged at the output end of the reduction gear 51. The reduction gear output end is arranged vertically upward, and the three-jaw chuck 52 is arranged in a vertical direction and fixedly installed on the output end of the reduction gear 51. The three-jaw chuck 52 can be driven to rotate by the output end of the reduction gear 51. The first connecting shaft or the second connecting shaft is plugged into the three-jaw chuck 52, and the first connecting shaft or the second connecting shaft is clamped and fixed by the three-jaw chuck 52.

[0043] like Figure 3 As shown, the first placement seat 2 is also provided with a first clamping assembly 9 capable of clamping the valve body 4. The first clamping assembly 9 includes a first support plate 60 fixedly arranged on the bottom plate of the sleeve 20, a pressure plate 61 arranged on the upper side of the sleeve 20 and capable of clamping the valve body 4 from top to bottom, and a quick clamp 62 arranged on the first support plate 60 to drive the pressure plate 61 to move. The pressure plate 61 has a positioning hole 63 corresponding to the axis of the valve body 4, and the pressure plate 61 is provided with a makeshift groove 64 connected to the positioning hole 63, and the capillary can be placed in the makeshift groove 64 accordingly.

[0044] After the valve body 4 is placed in the sleeve 20, the quick clamp 62 can be operated to drive the pressure plate 61 to flip from top to bottom, so that the pressure plate 61 presses the upper side of the valve body 4 from top to bottom, and the positioning hole 63 cooperates with the clearance groove 64 to connect the diaphragm welding part on the valve body 4 with the outside world for laser welding of the part 6.

[0045] The second placement seat 3 is also provided with a second clamping assembly 10 capable of clamping the temperature-sensing package 5. The second clamping assembly 10 includes a second support plate 70 fixedly provided on the lower side of the base 30, a slide groove 71 provided on the base 30 and connected to the socket, a slider 72 slidably connected to the slide groove 71 and capable of contacting and compressing the side wall of the temperature-sensing package 5, and an elbow clamp 73 provided on the second support plate 70 for driving the slider 72 to move. It also includes a contact block 74 fixedly provided on the upper end of the base 30 and capable of contacting the temperature-sensing package 5. The contact surface of the contact block 74 is set to an arc surface adapted to the temperature-sensing package 5.

[0046] After the temperature-sensing package 5 is plugged into the socket on the base 30 , the slider 72 is moved by operating the elbow clamp 73 so that the slider 72 contacts and presses the side wall of the temperature-sensing package 5 , thereby fixing the temperature-sensing package 5 .

[0047] A positioning assembly 11 capable of positioning the center of the upper end of the valve body 4 is also provided next to the first placement seat 2. The positioning assembly 11 includes a column 80 provided next to the first placement seat 2, a flip plate 81 rotatably connected to the upper end of the column 80, a positioning pin 82 provided at the end of the flip plate 81 to abut against the center point of the positioning valve body 4, and a limit block 83 provided on the column 80 to limit the flip angle of the flip plate 81. The limit block 83 can horizontally abut the lower side of the flip rod, so that the flip rod is in a horizontal state when it abuts the limit block 83.

[0048] To sum up, the utility model can place the valve body 4 and the temperature-sensitive bulb 5 in the first placement seat 2 and the second placement seat 3 respectively, and then drive the laser welding part 6 to move through the driving mechanism 7 so that its welding end can be moved to the welding point of the valve body 4 or the temperature-sensitive bulb 5, and then cooperate with the rotating mechanism 8 to realize the welding of the capillary with the temperature-sensitive bulb 5 and the diaphragm on the valve body 4, and realize the rapid positioning of the valve body 4 and the temperature-sensitive bulb 5 through the first placement seat 2 and the second placement seat 3, and adopt three-axis drive in conjunction with the rotating mechanism 8 to realize rapid and automatic welding, which can greatly improve welding efficiency and reduce labor costs.

[0049] Therefore, the utility model effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0050] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A laser welding device for an expansion valve, characterized in that: It includes a machine base, a first placement seat, a second placement seat, a laser welding part, and a driving mechanism. The first placement seat and the second placement seat are horizontally arranged along the Y-axis direction and are used to place the valve body and the temperature sensing package respectively. The laser welding part is located above the machine base and is connected to the driving mechanism. The driving mechanism can drive the laser welding part to feed along the X-axis, Y-axis, and Z-axis directions respectively. The machine base is also provided with two rotating mechanisms that can respectively drive the first placement seat and the second placement seat to rotate around the Z-axis direction.

2. The expansion valve laser welding device according to claim 1, characterized in that: The first placement seat includes a sleeve inserted into the valve body from top to bottom, a through groove provided on the side wall of the sleeve and adapted to the valve body port, and a first connecting shaft provided on the lower side of the first sleeve and connected to the rotating mechanism.

3. The expansion valve laser welding device according to claim 2, characterized in that: The second placement seat includes a base, a socket provided on the base for inserting the temperature sensing package, and a second connecting shaft provided on the lower side of the base for connecting to the rotating mechanism.

4. The expansion valve laser welding device according to claim 1, characterized in that: The driving mechanism includes a Y-axis slide rail arranged on the machine base along the Y-axis direction, an X-axis slide rail slidably connected to the Y-axis slide rail and arranged along the X-axis direction, a Z-axis slide rail arranged along the Z-axis direction and slidably connected to the X-axis slide rail, and a connecting arm slidably connected to the Z-axis slide rail and connected to the laser welding part. It also includes a Y-axis linear motor arranged on the Y-axis slide rail to drive the X-axis slide rail to move along the Y-axis direction, an X-axis linear motor arranged on the X-axis slide rail to drive the Z-axis slide rail to move along the X-axis, and a Z-axis linear motor arranged on the Z-axis slide rail to drive the connecting arm to move along the Z-axis direction.

5. The expansion valve laser welding device according to claim 3, characterized in that: The rotating mechanism includes a driving motor arranged on the machine base, a reduction gear box arranged at the output end of the driving motor and a three-jaw chuck arranged at the output end of the reduction gear box. The three-jaw chuck is arranged in a vertical direction, and the first connecting shaft or the second connecting shaft is plugged into the three-jaw chuck.

6. The expansion valve laser welding device according to claim 2, characterized in that: The first placement seat is also provided with a first clamping assembly capable of clamping the valve body. The first clamping assembly includes a first support plate fixedly arranged on the bottom plate of the sleeve, a pressure plate arranged on the upper side of the sleeve and capable of clamping the valve body from top to bottom, and a quick clamp arranged on the first support plate to drive the pressure plate to move. The pressure plate has a positioning hole corresponding to the axis of the valve body, and a clearance groove connected to the positioning hole is provided on the pressure plate.

7. The expansion valve laser welding device according to claim 3, characterized in that: The second placement seat is also provided with a second clamping assembly capable of clamping the temperature-sensitive package. The second clamping assembly includes a second support plate fixedly provided on the lower side of the base, a slide groove provided on the base and connected to the socket, a slider slidably connected to the slide groove and capable of contacting and compressing the side wall of the temperature-sensitive package, and an elbow clamp provided on the second support plate to drive the displacement of the slider. It also includes a contact block fixedly provided on the upper end of the base and capable of contacting the temperature-sensitive package, and the contact surface of the contact block is set to an arc surface adapted to the temperature-sensitive package.

8. The expansion valve laser welding device according to claim 1, characterized in that: A positioning assembly capable of positioning the center of the upper end of the valve body is also provided next to the first placement seat. The positioning assembly includes a column provided next to the first placement seat, a flip plate rotatably connected to the upper end of the column, a positioning pin provided at the end of the flip plate to contact the center point of the positioning valve body, and a limit block provided on the column to limit the flip angle of the flip plate.

Images