A valve welding workbench

Abstract

The present invention discloses a valve welding workbench, including a base, a bracket, a locking mechanism, a clamping mechanism and a control unit. A first driving assembly is arranged between the base and the turntable, and the first driving assembly includes a first driving motor and a reducer; the locking mechanism includes a position sensor, a baffle and a positioning plate, and an electromagnet matched with the baffle is arranged at the positioning plate; the clamping mechanism includes a first support, a second support and a first rotating shaft, the first support is fixedly connected to the bracket, the second support is slidably connected to the bracket via a slideway, a second driving motor is arranged at the first support, an adjusting mechanism is arranged at the bracket, and a chuck adapted to the valve sleeve is arranged at each end of each first rotating shaft. The valve welding workbench has the beneficial effect of accurately positioning the position of the workpiece to be welded.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a valve welding workbench. Background Art

[0002] The structure of the ball valve includes a valve body, a sleeve, an adjusting ball, a shaft sleeve and a valve stem. A water passage is provided at the adjusting ball, and the spherical surface of the adjusting ball contacts the end surface of the sleeve. The pipeline can be opened and cut off by adjusting the angle of the adjusting ball. The application number is: CN108533782A, and the name is: The application document of the spherical static balancing valve describes the structure of the ball valve. By referring to the application document, those skilled in the art can understand the types of valve bodies and sleeves applicable to this application.

[0003] When producing ball valves, after the shaft sleeve, regulating ball valve stem and valve body are connected, sleeves are usually required to be pressed onto both ends of the valve body, and the sleeves and the valve body are seamlessly welded by a welding machine. Therefore, a valve welding workbench is required to be used in conjunction with an automatic welding machine, through which the workpiece to be welded is transferred to the welding gun of the automatic welding machine to complete accurate welding of the workpiece to be welded. Summary of the invention

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides a valve welding workbench which can accurately position the workpiece to be welded during welding operation.

[0005] The technical solution of the present invention is: a valve welding workbench, comprising a base, a bracket, a locking mechanism, a clamping mechanism and a control unit, wherein a turntable is rotatably connected to the base, a first driving assembly for driving the turntable to rotate is arranged between the base and the turntable, the first driving assembly comprises a first driving motor and a reducer, and the bracket is arranged on the upper part of the turntable;

[0006] The locking mechanism is used to lock the turntable, and the locking mechanism includes a position sensor, a baffle and a positioning plate. The position sensor is arranged at the front end of the positioning plate and is used to transmit the position signal of the turntable. The baffle is arranged at the bottom of the turntable. The positioning plate is movably arranged at the base, and an electromagnet cooperating with the baffle is arranged at the positioning plate.

[0007] The clamping mechanisms are respectively arranged on both sides of the bracket, and each of the clamping mechanisms comprises a first support, a second support, and a first rotating shaft respectively rotatably connected to the first support and the second support, the first support is fixedly connected to the bracket, the second support is slidably connected to the bracket via a slideway, a second driving motor driving the first rotating shaft to rotate is arranged at the first support, an adjusting mechanism for adjusting the position of the second support is arranged at the bracket, and a chuck adapted to the valve sleeve is respectively arranged at the end of each of the first rotating shafts;

[0008] The first drive motor, each of the second drive motors, the position sensor and the electromagnet are electrically connected to the control unit respectively.

[0009] Preferably, the first drive motor and the reducer are slidably connected to the base via a mounting seat, a fixing plate is fixedly connected to the base, and an adjusting bolt is threadedly connected to the fixing plate.

[0010] Preferably, any of the above schemes further includes an inflation device, a shock absorbing mechanism is arranged at the positioning plate, the shock absorbing mechanism includes a first shield, a guide rod is arranged concentrically with the first shield, a plunger is slidably connected to the guide rod, a second shield is threadedly connected to the plunger, a receiving seat is arranged at the end of the second shield, an airbag is arranged between the outer edge of the plunger and the mounting seat, an inflation port and an exhaust port are respectively arranged at the airbag, the inflation port is connected to the inflation device, an inflation solenoid valve is arranged at the inflation port, and an exhaust solenoid valve is arranged at the exhaust port.

[0011] In any of the above schemes, preferably, a guide seat is provided at the inner wall of the second shield, and the guide seat is slidably connected to the guide rod.

[0012] In any of the above solutions, preferably, the second drive motor is a servo motor or a stepper motor.

[0013] In any of the above solutions, preferably, the adjusting mechanism is a cylinder or a screw.

[0014] In any of the above solutions, preferably, a non-slip pad is provided on the surface of each chuck.

[0015] In any of the above solutions, preferably, the anti-slip pad is made of silicone or rubber.

[0016] In any of the above schemes, it is preferred that the position sensor is any one of a reed switch, an infrared beam switch, and a contact switch.

[0017] In any of the above solutions, preferably, the chip of the control unit is a single-chip microcomputer.

[0018] The valve welding workbench of the present invention is used in conjunction with an automatic welding machine. The workpiece to be welded is transferred to the welding gun of the automatic welding machine through the welding workbench to complete accurate welding of the workpiece to be welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of an embodiment of a valve welding workbench of the present invention.

[0020] Figure 2 It is a schematic diagram of a preferred embodiment of the cooperation between the base and the turntable of the valve welding workbench of the present invention.

[0021] Figure 3 It is a schematic diagram of a preferred embodiment of the cooperation between the first drive motor and the mounting seat of the valve welding workbench of the present invention.

[0022] Figure 4 It is a schematic diagram of a preferred embodiment of the cooperation between the bracket and the clamping mechanism of the valve welding workbench of the present invention.

[0023] Figure 5 It is a schematic diagram of the cooperation among the second driving motor, the first rotating shaft and the chuck of the valve welding workbench of the present invention.

[0024] Figure 6 It is a schematic diagram of a preferred embodiment of the cooperation between the damping mechanism and the positioning plate of the valve welding workbench of the present invention.

[0025] Figure 7 for Figure 6 AA cross-sectional schematic diagram of the shock absorbing mechanism shown.

[0026] Figure 8 The figure is a circuit connection diagram of an embodiment of a valve welding workbench of the present invention.

[0027] Description of the numbers in the figure:

[0028] 101-first support; 102-chuck; 103-second support; 104-bracket; 105-base; 106-baffle; 107-turntable; 108-second rotating shaft; 109-bearing; 110-mounting seat; 111-adjusting bolt; 112-fixing plate; 113-shock absorbing mechanism; 114-axle seat; 115-first drive motor; 116-reducer; 117-adjusting mechanism; 118-slideway; 119-second drive motor; 120-first rotating shaft; 201-first shield; 202-inflating solenoid valve; 203-exhaust solenoid valve; 204-positioning plate; 205-electromagnet; 206-receiving seat; 207-second shield; 208-mounting flange; 209-airbag; 210-guide seat; 211-plunger. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] Embodiment 1:

[0032] The valve welding workbench in this embodiment is used in conjunction with an automatic welding machine, and the workpiece to be welded is transferred to the welding gun of the automatic welding machine through the welding workbench to complete accurate welding of the workpiece to be welded.

[0033] The base 105 serves to install the various mechanisms of the welding workbench. Specifically, a second rotating shaft 108 is provided at the center of the lower surface of the turntable 107 and perpendicular to the lower surface of the turntable 107. An axle seat 114 is provided inside the turntable 107. The second rotating shaft 108 of the turntable 107 is rotatably connected to the axle seat 114 via a bearing 109. In order to make the turntable 107 have a larger axial load, the bearing 109 is preferably a thrust bearing.

[0034] The first driving assembly is used to drive the turntable 107 to rotate. Specifically, the first driving assembly includes a first driving motor 115 and a reducer 116. The first driving motor 115 provides power for the turntable 107 to rotate through the reducer 116. The circumference of the turntable 107 and the power output wheel of the reducer 116 are provided with teeth meshing with each other, and the reducer 116 and the turntable 107 are driven by gear meshing. To ensure the transmission efficiency between the reducer 116 and the turntable 107, the first driving motor 115 and the reducer 116 are fixedly connected to the mounting seat 110, and a slide groove for the mounting seat 110 to slide is provided at the base 105, and the mounting seat 110 is slidably connected to the slide groove. The mounting seat 110 also includes a fixing plate 112. When in use, the fixing plate 112 is fixedly connected to the base 105, and an adjusting bolt 111 is provided between the fixing plate 112 and the mounting seat 110, wherein the adjusting bolt 111 is threadedly connected to the fixing plate 112. When in use, by rotating the position of the adjusting bolt 111, the adjusting bolt 111 provides thrust to the mounting seat 110, so that the output teeth of the reducer 116 are effectively in contact with the turntable 107.

[0035] The bracket 104 is fixedly connected to the upper surface of the turntable 107 by bolts, and the bracket 104 serves to install the clamping mechanism. The clamping mechanisms are respectively arranged on both sides of the frame, and each clamping mechanism is used to clamp the workpiece to be welded. The double-sided arrangement of the clamping mechanism ensures that the workpiece at the clamping mechanism on one side can be disassembled and assembled on the other side after arriving at the welding station, so as to improve work efficiency. Specifically, each of the clamping mechanisms includes a first support 101, a second support 103, and a first rotating shaft 120 rotatably connected to the first support 101 and the second support 103, respectively, wherein the first rotating shaft 120 at the first support 101 and the second support 103 are collinear. The first support 101 is fixedly connected to the bracket 104, and the second support 103 is slidably connected to the bracket 104 via a slide 118. The bracket 104 is provided with an adjustment mechanism 117 for adjusting the position of the second support 103. The adjustment mechanism 117 can drive the second support 103 to slide left and right along the bracket 104, so as to realize the filling of the valve to be processed. The adjustment mechanism 117 can be in the form of a cylinder or a screw. The chuck 102 arranged at each of the first rotating shafts 120 is arranged in a truncated cone shape. When the clamping mechanism clamps the valve to be welded, the chuck 102 is clamped into the sleeve of the valve to be processed, so as to realize the clamping mechanism clamping the valve to be processed. When the clamping mechanism drives the workpiece to be welded to move to the automatic welding machine, the second drive motor 119 drives the first rotating shaft 120 at the first support 101 to rotate, so as to drive the valve to be welded to make a rotary motion, and the welding gun of the automatic welding machine completes the welding of the valve body and the sleeve of the valve to be welded.

[0036] Among them, when the valve size changes, in order to ensure the consistency of the weld movement speed between the valve body and the sleeve during welding operations, the second drive motor 119 can adopt a servo motor or a stepper motor. The welding effect can be guaranteed by precise control of the speed or number of revolutions of the second drive motor 119.

[0037] The locking mechanism is used to lock the turntable 107 to ensure that the valve to be welded at the holding mechanism is exactly at the specified position. The locking mechanism includes two, each of which is used to position each clamping mechanism under the automatic welding machine. Each of the locking mechanisms includes a position sensor, a baffle 106, and a positioning plate 204. The position sensor is arranged at the front end of the positioning plate 204, the baffle 106 is arranged at the bottom of the turntable 107, and the electromagnet 205 is arranged on the contact side of the positioning plate 204 and the baffle 106. The position sensor is used to transmit the position signal of the turntable 107, wherein the position sensor can be any one of a reed switch, an infrared beam switch, and a contact switch. When the clamping mechanism of the valve welding workbench involves the workstation conversion, the baffle 106 at the bottom of the turntable 107 contacts the position sensor in advance. After receiving the trigger signal of the position sensor, the control unit controls the first drive motor 115 to be powered off, and the turntable 107 loses power and stops rotating. At this time, the control unit controls the electromagnet 205 to be powered on, and the electromagnet 205 adjusts the turntable 107 to the specified position by sucking the baffle 106. The base 105 is provided with a waist-shaped hole for installing the positioning plate 204. When each locking mechanism is assembled with the base 105, the clamping mechanism is first manually adjusted to the bottom of the automatic welding machine accurately, and the position of the positioning plate 204 is adjusted so that the electromagnet 205 at the positioning plate 204 just contacts the baffle 106.

[0038] The control unit is provided with a plurality of I / O interfaces. Specifically, the first drive motor 115 is connected in parallel with the power supply via a first relay, each of the second drive motors 119 is connected in parallel with the power supply via a second relay, each of the electromagnets 205 is connected in parallel with the power supply via a third relay, and the first relay, each of the second relays and each of the third relays are electrically connected to the corresponding I / O interfaces at the control unit, respectively. The control unit controls the opening and closing of the first drive motor 115, each of the second drive motors 119 and each of the electromagnets 205 by controlling each of the relays, and each of the position sensors is electrically connected to the I / O interfaces at the control unit, respectively.

[0039] When in use, the signal line of the automatic welding machine is electrically connected to the I / O interface at the control unit. A control switch is provided at the first support 101 of each clamping mechanism. After the pre-welding valve is installed at the clamping mechanism on one side, the control switch is pressed, and the control unit controls the first drive motor 115 to rotate clockwise through the first relay. When the control unit receives the feedback signal of the position sensor at the locking mechanism on one side, the control unit stops the first drive motor 115 through the first relay. At this time, the control unit controls the third relay at the locking mechanism on one side to turn on the electromagnet 205. Under the attraction of the electromagnet 205, the turntable 107 is pulled to the specified position. After a delay of S seconds, the control unit controls the second drive motor 119 to make a rotation through the second relay. The control unit delays S seconds to control the second relay to turn on to provide time for the welding gun of the automatic welding machine to adjust the position.

[0040] It can be understood that the functions of the control unit are realized by the control unit hardware itself and the program installed in the control unit, wherein the chip of the control unit can be a single-chip microcomputer or a PLC programmable controller.

[0041] Embodiment 2:

[0042] On the basis of Example 1, an inflatable device is added in this embodiment, and a shock absorbing mechanism 113 is provided at the positioning plate 204 of each locking mechanism. Specifically, the shock absorbing mechanism 113 includes a first shield 201, and a mounting flange 208 is provided at the outer edge of the first shield 201. The first shield 201 is fixedly connected to the positioning plate 204 through the mounting flange 208. A plunger 211 is slidably connected to the guide rod concentrically arranged with the first shield 201, and a second shield 207 is threadedly connected to the plunger 211. A receiving seat 206 is provided at the end of the second shield 207. An airbag 209 is provided between the outer edge of the plunger 211 and the mounting seat 110. An inflating port and an exhaust port are respectively provided at the airbag 209. The inflating port is connected to the inflatable device, and an inflating solenoid valve 202 is provided at the inflating port, and an exhaust solenoid valve 203 is provided at the exhaust port.

[0043] During use, before the baffle 106 at the bottom of the turntable 107 contacts the positioning plate 204, the control unit first inflates the airbag 209 by opening the inflation solenoid valve 202. During the contact between the baffle 106 and the positioning plate 204, the control unit deflates the airbag 209 by opening the exhaust solenoid valve 203. Under the suction action of the electromagnet 205, the turntable 107 is slowly pulled to the specified position, thereby reducing the vibration generated by the locking mechanism during positioning to ensure the accuracy of the valve welding workbench.

[0044] In this embodiment, a guide seat 210 is provided at the inner wall of the second shield 207, and the guide seat 210 is slidably connected to the guide rod. When in use, the plunger 211 cooperates with the guide seat 210 to prevent the plunger 211 from abnormally wearing when the force at the receiving seat 206 does not overlap with the guide rod.

[0045] Embodiment 3:

[0046] On the basis of Embodiment 1 or 2, an anti-skid pad is provided on the surface of each chuck 102. The anti-skid pad can increase the friction between the valve to be welded and the chuck 102, wherein the anti-skid pad is made of silicone or rubber.

[0047] The embodiments described above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered within the protection scope of the present invention.

Claims

1. A valve welding workbench, comprising a base (105), a bracket (104), a locking mechanism, a clamping mechanism and a control unit, characterized in that: The base (105) is rotatably connected to a turntable (107); a first driving assembly for driving the turntable (107) to rotate is arranged between the base (105) and the turntable (107); the first driving assembly comprises a first driving motor (115) and a reducer (116); and the bracket (104) is arranged on the upper part of the turntable (107); The locking mechanism is used to lock the turntable (107), and the locking mechanism comprises a position sensor, a baffle (106) and a positioning plate (204); the position sensor is arranged at the front end of the positioning plate (204) and is used to transmit a position signal of the turntable (107); the baffle (106) is arranged at the bottom of the turntable (107); the positioning plate (204) is movably arranged at the base (105); and an electromagnet (205) cooperating with the baffle (106) is arranged at the positioning plate (204); The clamping mechanisms are respectively arranged on both sides of the bracket (104), and each of the clamping mechanisms comprises a first support (101), a second support (103), and a first rotating shaft (120) respectively rotatably connected to the first support (101) and the second support (103); the first support (101) is fixedly connected to the bracket (104), and the second support (103) is slidably connected to the bracket (104) via a slideway (118); a second driving motor (119) for driving the first rotating shaft (120) to rotate is arranged at the first support (101), and an adjusting mechanism (117) for adjusting the position of the second support (103) is arranged at the bracket (104); and a chuck (102) adapted to the valve sleeve is respectively arranged at the end of each first rotating shaft (120); The first drive motor (115), each of the second drive motors (119), the position sensor and the electromagnet (205) are electrically connected to the control unit respectively; the first drive motor (115) and the reducer (116) are slidably connected to the base (105) via a mounting seat (110); a fixing plate (112) is fixedly connected to the base (105); and an adjusting bolt (111) is threadedly connected to the fixing plate (112); It also includes an inflation device, wherein a shock absorbing mechanism (113) is arranged at the positioning plate (204), and the shock absorbing mechanism (113) includes a first shield (201), and a guide rod is arranged concentrically with the first shield (201), a plunger (211) is slidably connected to the guide rod, and a second shield (207) is threadedly connected to the plunger (211), and a receiving seat (206) is arranged at the end of the second shield (207), and an air bag (209) is arranged between the outer edge of the plunger (211) and the first shield (201), and an inflation port and an exhaust port are respectively arranged at the air bag (209), and the inflation port is connected to the inflation device, and an inflation solenoid valve (202) is arranged at the inflation port, and an exhaust solenoid valve (203) is arranged at the exhaust port.

2. The valve welding workbench according to claim 1, characterized in that: A guide seat (210) is provided on the inner wall of the second protective cover (207), and the guide seat (210) is slidably connected to the guide rod.

3. The valve welding workbench according to claim 1, characterized in that: The second driving motor (119) is a servo motor or a stepping motor.

4. The valve welding workbench according to claim 1, characterized in that: The adjusting mechanism (117) is a cylinder or a lead screw.

5. The valve welding workbench according to claim 1, characterized in that: The surface of each chuck (102) is provided with an anti-slip pad.

6. The valve welding workbench according to claim 5, characterized in that: The material of the anti-slip pad is silica gel or rubber.

7. The valve welding workbench according to claim 1, characterized in that: The position sensor is any one of a reed switch, an infrared beam switch and a contact switch.

8. The valve welding workbench according to claim 1, characterized in that: The chip of the control unit is a single chip microcomputer.

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