An instrument positioning and welding device for instrument production

Abstract

The present invention relates to the technical field of instrument production, and particularly relates to an instrument positioning and welding device for instrument production. It includes a support base, a welding frame is fixedly connected to the support base, symmetrically distributed first electric push rods are fixedly connected to the support base, the telescopic ends of the symmetrically distributed first electric push rods are jointly fixedly connected to a lifting frame, the lifting frame is slidably connected to a second electric slide rail, the second electric slide rail is provided with symmetrically distributed sliders, both opposite sides of the symmetrically distributed sliders are slidably connected to connecting pipes, the symmetrically distributed connecting pipes are fixedly connected and communicated with hydraulic shells, and the hydraulic shells are fixedly connected and communicated with circumferentially distributed first telescopic rods. In the present invention, the sliders on the second electric slide rail drive the parts thereon to move, so that the telescopic ends of the first telescopic rods extend out and complete the fixation and positioning of the Bourdon tube, avoiding that when the Bourdon tube is placed, the Bourdon tube is easily misaligned with the groove of the joint, resulting in uneven distance between the edge of the Bourdon tube and the groove of the joint, and affecting the welding strength between the Bourdon tube and the joint.

Description

Technical Field

[0001] The present invention relates to the technical field of instrument production, and particularly relates to an instrument positioning and welding device for instrument production. Background Art

[0002] An instrument is a general term for instruments that display numerical values, including pressure gauges. A pressure gauge refers to an instrument that uses an elastic element as a sensitive element to measure and indicate a pressure higher than the ambient pressure. The elastic element refers to a hollow spring tube, also known as a Bourdon tube. When in use, the deformation of the Bourdon tube is converted into the rotational force of a pointer through a conversion mechanism, thereby driving the pointer to rotate to achieve the purpose of measurement. Existing pressure gauges usually place one end of the Bourdon tube in a groove of a joint, clamp and fix the Bourdon tube and the joint, and then melt solder by high-frequency induction heating to weld the Bourdon tube and the joint. However, when fixing the Bourdon tube, since the Bourdon tube is arc-shaped, the existing fully automatic welding device fixes the Bourdon tube by clamping it from both sides, and it is not easy to determine the center of the Bourdon tube. At the same time, since the area of the groove in the joint is larger than the cross-sectional area of the end of the Bourdon tube, during the process of placing the Bourdon tube into the groove of the joint, the position of the Bourdon tube shifts, not conforming to the standard welding position, and thus the outer side of the Bourdon tube fits against one side of the inner wall of the joint groove, making the gap between the Bourdon tube and the joint groove uneven. As a result, the subsequently melted solder cannot uniformly contact the Bourdon tube and the joint, leading to a reduction in the welding strength between the Bourdon tube and the joint and affecting the service life of the pressure gauge. Summary of the Invention

[0003] The present invention provides an instrument positioning and welding device for instrument production, aiming to solve the drawbacks of the existing device that when placing the Bourdon tube, it is not easy to determine the center of the Bourdon tube, resulting in easy deviation of the Bourdon tube in the joint groove, uneven gaps between the Bourdon tube and the joint groove, and affecting the welding strength between the Bourdon tube and the joint.

[0004] The technical solution of the present invention is as follows: An instrument positioning and welding device for instrument production, including a support base, on the upper side of the support base is fixedly connected with a first electric slide rail, inside the first electric slide rail is provided with a slider, which is fixedly connected with a fixed shell, on one side of the support base close to the fixed shell are fixedly connected with a welding frame and a feeding frame, on the side of the support base far from the first electric slide rail are fixedly connected with symmetrically distributed first electric push rods, the telescopic ends of the symmetrically distributed first electric push rods are jointly fixedly connected with a lifting frame, the lifting frame is slidably connected with the support base, on the upper side of the lifting frame is slidably connected with a second electric slide rail, the second electric slide rail is fixedly connected with a bidirectional elastic telescopic rod, the second electric slide rail is provided with symmetrically distributed sliders, and on the facing sides of the symmetrically distributed sliders are both slidably connected with connecting pipes, between the connecting pipe and the adjacent slider is provided with a tension spring, the connecting pipe is communicated with the fixed part of the bidirectional elastic telescopic rod through a hose, the facing ends of the symmetrically distributed connecting pipes are both fixedly connected and communicated with a hydraulic shell, the hydraulic shell is fixedly connected and communicated with circumferentially distributed first telescopic rods, on the connecting pipe is provided with an adjusting mechanism for driving the adjacent hydraulic shell to rotate, and on the feeding frame is provided with an aligning mechanism for aligning materials.

[0005] Further, the adjusting mechanism includes a first elastic telescopic rod, the first elastic telescopic rod is fixedly connected to the adjacent connecting pipe, the fixed part of the first elastic telescopic rod is communicated with the adjacent connecting pipe through a hose, the telescopic end of the first elastic telescopic rod is fixedly connected with a pressing ring, one end of the connecting pipe close to the adjacent hydraulic shell is fixedly connected with a connecting block, the connecting block is slidably connected with symmetrically distributed arc-shaped frames, the arc-shaped frames are in pressing fit with the adjacent pressing rings, between the arc-shaped frames and the adjacent connecting blocks is provided with a spring, on the side of the arc-shaped frame far from the adjacent connecting pipe is fixedly connected with a second elastic telescopic pipe, the fixed part of the second elastic telescopic pipe far from the bidirectional elastic telescopic rod is communicated with the fixed part of the adjacent first telescopic rod through a hose, all the circumferentially distributed first telescopic rods are provided with through holes, and in the through hole of the first telescopic rod communicated with the adjacent second elastic telescopic pipe is provided with a one-way valve, the fixed parts of the adjacent and symmetrically distributed second elastic telescopic pipes are jointly communicated through a hose, the telescopic end of the second elastic telescopic pipe is fixedly connected with a positioning plate, on the positioning plate far from the bidirectional elastic telescopic rod is provided with a reset assembly, and the reset assembly is used to reset the adjacent second elastic telescopic pipe.

[0006] Further, the diameter of the fixed part of the second elastic telescopic pipe is smaller than the diameter of the fixed part of the first telescopic rod.

[0007] Further, the reset component includes a third elastic telescopic rod, the third elastic telescopic rod is fixedly connected to the side of the adjacent positioning plate close to the bidirectional elastic telescopic rod, the telescopic end of the third elastic telescopic rod is in pressing fit with the fixed shell, a second telescopic tube is fixedly connected to the fixed part of the second elastic telescopic tube communicated with the adjacent first telescopic rod, the fixed part of the second telescopic tube is communicated with the fixed part of the adjacent third elastic telescopic rod through a hose, and a sealing ring is fixedly connected to the telescopic end of the second telescopic tube.

[0008] Further, a through hole is provided in the fixed part of the second elastic telescopic tube away from the bidirectional elastic telescopic rod, the through hole is in sealing fit with the through hole of the adjacent sealing ring, and the height of the sealing ring is greater than the diameter of the through hole.

[0009] Further, the slider of the second electric slide rail is threadedly connected with an adjusting rod, and the two telescopic ends of the bidirectional elastic telescopic rod are respectively in pressing fit with the adjacent adjusting rod.

[0010] Further, the alignment mechanism includes symmetrically distributed fixing plates, the symmetrically distributed fixing plates are all slidably connected to the inside of the feeding frame, a tension spring is arranged between the fixing plates and the feeding frame, symmetrically distributed adjusting plates are slidably connected to the lower side surface of the feeding frame, a spring is arranged between the adjusting plates and the feeding frame, the second electric slide rail is fixedly connected with a U-shaped frame, and the symmetrically distributed adjusting plates are respectively in pressing fit with the U-shaped frame. The lifting frame is fixedly connected with a second electric push rod, and the telescopic end of the second electric push rod is fixedly connected with the second electric slide rail.

[0011] Further, an exhaust mechanism is further included, the exhaust mechanism is used for exhausting the gas inside the material, the exhaust mechanism is arranged on the first electric slide rail, the exhaust mechanism includes a pressing block, the pressing block is fixedly connected to the side of the first electric slide rail away from the lifting frame, a transmission plate is slidably connected to the side of the fixed shell close to the pressing block, a spring is arranged between the transmission plate and the fixed shell, the transmission plate is in pressing fit with the pressing block, and a ventilation pipe is fixedly connected to the upper part of the transmission plate.

[0012] Further, a sealing plug is slidably connected to the middle of the ventilation pipe, a spring is arranged between the sealing plug and the transmission plate, and the sealing plug is in sealing fit with the fixed shell.

[0013] Further, the diameter of the side of the sealing plug close to the fixed shell is smaller than the diameter of the other side.

[0014] The present invention has at least the following beneficial effects compared with the prior art: 1. When fixing the Bourdon tube, the slider on the second electric slide rail drives the parts thereon to move, so that the hydraulic housing moves below the Bourdon tube. Then, by squeezing the telescopic end of the double-acting elastic telescopic rod, the hydraulic oil in it enters the fixed part of the first telescopic rod, so that the telescopic end of the first telescopic rod extends and completes the fixation and positioning of the Bourdon tube, avoiding that when placing the Bourdon tube, the Bourdon tube is easily misaligned with the groove of the joint, resulting in uneven distance between the edge of the Bourdon tube and the groove of the joint, and affecting the welding strength between the Bourdon tube and the joint.

[0015] 2. When calibrating the Bourdon tube, the extrusion ring squeezes two adjacent arc-shaped frames, so that the arc-shaped frames drive the positioning plate to rotate and squeeze the adjacent ends of the Bourdon tube, thereby adjusting the angle of the Bourdon tube, avoiding that when placing the Bourdon tube into the groove of the joint, there is a deviation in the angle of the end of the Bourdon tube, affecting the accuracy of the Bourdon tube placement.

[0016] 3. When welding the Bourdon tube, the ventilation pipe is inserted into the hole of the joint, and the air in the joint is extracted during welding, so that the air in the joint has a downward flow tendency, thereby reducing the amount of gas flowing upward from the groove of the joint, avoiding that when the melted solder enters the gap between the joint and the Bourdon tube, the gas in the joint hole moves upward and enters the solder to form bubbles, affecting the strength after welding between the joint and the Bourdon tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 is a three-dimensional structural schematic diagram of the connecting pipe, fixing plate and extrusion block of the present invention;

[0019] Figure 3 is a three-dimensional structural schematic diagram of the welding frame, first electric push rod and lifting frame of the present invention;

[0020] Figure 4 is a three-dimensional structural schematic diagram of the positioning plate, third elastic telescopic rod and adjusting rod of the present invention;

[0021] Figure 5 is a three-dimensional structural schematic diagram of the second elastic telescopic tube, second telescopic tube and sealing ring of the present invention;

[0022] Figure 6 is a three-dimensional structural schematic diagram of the extrusion ring, connecting block and arc-shaped frame of the present invention;

[0023] Figure 7 is a three-dimensional structural schematic diagram of the hydraulic housing, first elastic telescopic rod and connecting block of the present invention;

[0024] Figure 8Schematic three-dimensional structure diagram of the second elastic telescopic tube, positioning plate and sealing ring of the present invention;

[0025] Figure 9 Schematic three-dimensional structure diagram of the adjusting rod, fixed plate and U-shaped frame of the present invention;

[0026] Figure 10 Schematic three-dimensional structure diagram of the first electric slide rail, extrusion block and transmission plate of the present invention;

[0027] Figure 11 Schematic three-dimensional structure diagram of the fixed shell, transmission plate and ventilation pipe of the present invention;

[0028] Figure 12 Schematic three-dimensional structure diagram of the fixed shell, ventilation pipe and sealing plug of the present invention;

[0029] Figure 13 Schematic diagram of the state of the fixed shell, positioning plate and third elastic telescopic rod of the present invention.

[0030] Reference numerals in the figure are: 1 - support base, 2 - first electric slide rail, 3 - fixed shell, 4 - welding frame, 5 - feeding frame, 6 - first electric push rod, 7 - lifting frame, 8 - second electric slide rail, 9 - bidirectional elastic telescopic rod, 10 - connecting pipe, 11 - hydraulic shell, 12 - first telescopic rod, 21 - first elastic telescopic rod, 22 - extrusion ring, 23 - connecting block, 24 - arc-shaped frame, 25 - second elastic telescopic tube, 26 - positioning plate, 31 - third elastic telescopic rod, 32 - second telescopic tube, 33 - sealing ring, 41 - adjusting rod, 51 - fixed plate, 52 - adjusting plate, 53 - U-shaped frame, 54 - second electric push rod, 61 - extrusion block, 62 - transmission plate, 63 - ventilation pipe, 71 - sealing plug. Detailed implementation manners

[0031] The present invention will be further described below in conjunction with the embodiments shown in the drawings.

[0032] When welding the joint and the Bourdon tube, usually one end of the Bourdon tube is placed in the groove of the joint, and then the Bourdon tube and the joint are clamped and fixed by the staff through the existing clamping device, and the connection between the two is welded. However, when fixing the Bourdon tube, since the Bourdon tube is arc-shaped, most of the existing devices fix it by clamping both ends of the Bourdon tube. It is not easy to determine the center of the Bourdon tube. At the same time, since the area of the groove at the joint is larger than the cross-sectional area of the end of the Bourdon tube, during the process of placing the Bourdon tube into the groove of the joint, the position of the Bourdon tube is likely to shift, not conforming to the standard welding position, causing the Bourdon tube to fit against one side of the inner wall of the joint groove, making the gap between the Bourdon tube and the joint groove uneven, resulting in the subsequent molten solder being unable to contact the Bourdon tube and the joint evenly, and further reducing the welding strength of the Bourdon tube and the joint, affecting the service life of the pressure gauge.

[0033] Embodiment 1: An instrument positioning and welding device for instrument production, in combination with Figures 1-7 and Figure 13 As shown, it includes a support base 1. At the front part of the upper side of the support base 1, a first electric slide rail 2 is fixedly connected. A slider is arranged inside the first electric slide rail 2. The upper side surface of the slider is fixedly connected with a fixed shell 3, and the fixed shell 3 is used to fix the joint. On the left part of the upper side surface of the support base 1, a welding frame 4 and a feeding frame 5 are fixedly connected. The welding frame 4 is composed of an induction coil and a soldering gun. The induction coil is used to heat the connection between the joint and the Bourdon tube, and the soldering gun is used to convey solder to the connection between the joint and the Bourdon tube. At the rear part of the upper side surface of the support base 1, two first electric push rods 6 symmetrically distributed left and right are fixedly connected. The telescopic ends of the two first electric push rods 6 are jointly fixedly connected with a lifting frame 7. The rear side of the lifting frame 7 is slidably connected with the support base 1, which is used to increase the strength of the lifting frame 7 here. At the front part of the upper side surface of the lifting frame 7, a second electric slide rail 8 is slidably connected. On the front side surface of the second electric slide rail 8, two chutes symmetrically distributed left and right are arranged. In the middle of the front side surface of the second electric slide rail 8, a bidirectional elastic telescopic rod 9 is fixedly connected. Sliders are arranged in both chutes of the second electric slide rail 8, and the front ends of both sliders are slidably connected with a connecting pipe 10. A tension spring is arranged between the connecting pipe 10 and the adjacent slider, and the tension spring is used to drive the adjacent connecting pipe 10 to move back to its original position. Both connecting pipes 10 are communicated with the fixed part of the bidirectional elastic telescopic rod 9 through hoses. When the telescopic end of the bidirectional elastic telescopic rod 9 is squeezed, the hydraulic oil in the fixed part of the bidirectional elastic telescopic rod 9 enters the two connecting pipes 10 through the hoses. The opposite ends of both connecting pipes 10 are fixedly connected with hydraulic shells 11, and the hydraulic shells 11 are communicated with the adjacent connecting pipes 10. The hydraulic shell 11 is fixedly connected with three first telescopic rods 12 distributed circumferentially. The fixed part of the first telescopic rod 12 is communicated with the adjacent hydraulic shell 11. The telescopic end of the first telescopic rod 12 is provided with a fixed block, and the fixed block is used to fix the Bourdon tube and determine the center of the Bourdon tube. The fixed parts of the first telescopic rod 12, the connecting pipe 10, the hydraulic shell 11 and the fixed part of the bidirectional elastic telescopic rod 9 are all filled with hydraulic oil. An adjusting mechanism for driving the adjacent hydraulic shell 11 to rotate is arranged on the connecting pipe 10, and an aligning mechanism for aligning materials is arranged on the feeding frame 5.

[0034] In combination with Figures 5-8 and Figure 13As shown in the figure, the adjusting mechanism includes a first elastic telescopic rod 21. The first elastic telescopic rod 21 is fixedly connected to the middle of the lower side of the adjacent connecting pipe 10. The fixed part of the first elastic telescopic rod 21 is communicated with the adjacent connecting pipe 10 through a hose. The fixed part of the first elastic telescopic rod 21 is filled with hydraulic oil. The telescopic end of the first elastic telescopic rod 21 is fixedly connected with a pressing ring 22. A connecting block 23 is fixedly connected to the upper part of the connecting pipe 10 close to the adjacent hydraulic shell 11. Two arc-shaped frames 24 symmetrically distributed front and back are slidably connected to the connecting block 23. Springs are arranged between the arc-shaped frames 24 and the adjacent connecting block 23. Two inclined surfaces symmetrically distributed front and back are arranged on one side of the pressing ring 22 close to the adjacent connecting block 23. The two inclined surfaces on the pressing ring 22 are respectively in pressing cooperation with the adjacent arc-shaped frames 24. When the pressing ring 22 approaches the arc-shaped frame 24, the inclined surfaces on the pressing ring 22 press the adjacent arc-shaped frames 24, causing the arc-shaped frames 24 to rotate and compress the adjacent springs. Second elastic telescopic tubes 25 are fixedly connected to the lower parts of the two arc-shaped frames 24. The elastic coefficient of the elastic member in the fixed part of the second elastic telescopic tube 25 is smaller than the elastic coefficient of the elastic member in the fixed part of the first elastic telescopic rod 21, so that the telescopic end of the second elastic telescopic tube 25 extends first. The fixed part of the second elastic telescopic tube 25 is filled with gas. The fixed part of the front second elastic telescopic tube 25 is communicated with the fixed part of the adjacent front first telescopic rod 12 through a hose. The diameter of the fixed part of the second elastic telescopic tube 25 is smaller than the diameter of the fixed part of the first telescopic rod 12, and the diameter of the fixed part of the second elastic telescopic tube 25 is one-half of the diameter of the fixed part of the first telescopic rod 12, so that the telescopic end of the second elastic telescopic tube 25 extends synchronously with the telescopic end of the first telescopic rod 12. The area in the fixed part of the first telescopic rod 12 communicated with the second elastic telescopic tube 25 is filled with gas. The fixed part of the first telescopic rod 12 is provided with a through hole, and a one-way valve is arranged in the through hole of the first telescopic rod 12 communicated with the fixed part of the adjacent second elastic telescopic tube 25. The one-way valve closes when the telescopic end of the adjacent first telescopic rod 12 extends, so that gas enters the fixed part of the adjacent second elastic telescopic tube 25, and opens when the telescopic end of the adjacent first telescopic rod 12 retracts, so that gas enters the fixed part of the first telescopic rod 12. The fixed parts of the adjacent two second elastic telescopic tubes 25 on the same connecting pipe 10 are jointly communicated through a hose. The telescopic end of the second elastic telescopic tube 25 is fixedly connected with a positioning plate 26. The positioning plate 26 is used to push the Bourdon tube to rotate. A reset assembly is arranged on the front positioning plate 26. The reset assembly is used to reset the adjacent second elastic telescopic tube 25.

[0035] Combined with Figures 4-6 、 Figure 8 and Figure 13As shown, the reset assembly includes a third elastic telescopic rod 31. The third elastic telescopic rod 31 is fixedly connected to the rear side of the adjacent positioning plate 26. The telescopic end of the third elastic telescopic rod 31 is in extrusion fit with the fixed shell 3. After the telescopic end of the third elastic telescopic rod 31 contacts the fixed shell 3, the telescopic end of the third elastic telescopic rod 31 is pushed to retract. A second telescopic tube 32 is fixedly connected to the fixed part of the second elastic telescopic tube 25 on the front side. The fixed part of the second telescopic tube 32 is communicated with the fixed part of the adjacent third elastic telescopic rod 31 through a hose. When the telescopic end of the third elastic telescopic rod 31 is compressed, the hydraulic oil in the fixed part of the third elastic telescopic rod 31 enters the fixed part of the adjacent second telescopic tube 32 through the hose, causing the telescopic end of the second telescopic tube 32 to extend. A sealing ring 33 is fixedly connected to the telescopic end of the second telescopic tube 32. The sealing ring 33 is in sealing fit with the adjacent second elastic telescopic tube 25. A through hole is provided in the upper part of the fixed part of the second elastic telescopic tube 25 on the front side. The through hole is used to discharge the gas in the fixed part of the adjacent second elastic telescopic tube 25. The through hole is in sealing fit with the adjacent sealing ring 33. Initially, the sealing ring 33 seals the through hole on the fixed part of the adjacent second elastic telescopic tube 25, and the height of the sealing ring 33 is greater than the diameter of the through hole, so as to release the seal of the adjacent second elastic telescopic tube 25 after the sealing ring 33 moves upward by a certain distance, and discharge the gas in the fixed part of the second elastic telescopic tube 25.

[0036] Combined with Figure 4 and Figure 9 As shown, an adjusting rod 41 is threadedly connected to the slider of the second electric slide rail 8. The adjusting rod 41 is used to adjust the compressed distance of the telescopic end of the bi-directional elastic telescopic rod 9, so as to adjust the extended distance of the telescopic end of the first telescopic rod 12 according to the size of the Bourdon tube, enabling the device to fix Bourdon tubes of different sizes and improving the applicability of the device. The two telescopic ends of the bi-directional elastic telescopic rod 9 are respectively in extrusion fit with the adjacent adjusting rod 41. When the two sliders on the second electric slide rail 8 approach each other, the adjusting rod 41 squeezes the adjacent telescopic end of the bi-directional elastic telescopic rod 9.

[0037] Combined with Figures 2-4 and Figure 9As shown in the figure, the alignment mechanism includes two fixed plates 51 symmetrically distributed before and after. Both fixed plates 51 are slidably connected to the inside of the feeding frame 5. A tension spring is provided between the fixed plate 51 and the feeding frame 5. The fixed plate 51 is used to fix Bourdon tubes of different sizes. Two adjusting plates 52 symmetrically distributed left and right are slidably connected to the lower side of the feeding frame 5. Springs are provided between both adjusting plates 52 and the feeding frame 5. The upper part of the second electric slide rail 8 is fixedly connected with a U-shaped frame 53. The opening of the U-shaped frame 53 faces forward. Inclined surfaces are provided on the opposite sides of the front end of the U-shaped frame 53. The two adjusting plates 52 are respectively in extrusion fit with the adjacent inclined surfaces on the U-shaped frame 53. When the U-shaped frame 53 moves forward, the inclined surfaces on the U-shaped frame 53 extrude the adjacent adjusting plates 52, causing the two adjusting plates 52 to approach each other and adjust the position of the Bourdon tube. The lifting frame 7 is fixedly connected with a second electric push rod 54. The telescopic end of the second electric push rod 54 is fixedly connected with the second electric slide rail 8. The second electric push rod 54 is used to push the second electric slide rail 8 to move, so that the end of the Bourdon tube is aligned with the groove of the joint.

[0038] When the staff uses this device to weld the joint and the Bourdon tube in the pressure gauge, the staff sequentially place the Bourdon tubes to be welded into the feeding frame 5 and make their openings face downward (as Figure 1 shown). During this process, the staff push the Bourdon tube downward to squeeze the two fixed plates 51. The fixed plates 51 move and stretch the adjacent tension springs. After the Bourdon tube contacts the feeding frame 5, the staff complete the placement of the Bourdon tube. After the Bourdon tube is fixed, the staff place the joint to be welded into the fixed shell 3 and make the groove of the joint located at the rear side (as Figure 1 shown). After the joint is placed, the staff start the first electric slide rail 2. The first electric slide rail 2 drives the fixed shell 3 to move leftward through the slider on it. When the slider moves to the left end of the first electric slide rail 2, the staff turn off the first electric slide rail 2, thus completing the fixation of the joint. At this time, the groove of the joint is located below the induction coil on the welding frame 4.

[0039] After the above-mentioned fixing of the joint is completed, the staff rotates the two adjusting rods 41 according to the diameter of the Bourdon tube, so that the adjusting rods 41 move a certain distance in the direction of the double-direction elastic telescopic rod 9 (this distance is related to the diameter of the Bourdon tube. The larger the diameter of the Bourdon tube, the greater the distance the adjusting rod 41 moves). After the adjustment of the adjusting rod 41 is completed, the staff starts the second electric slide rail 8. The two sliders on the second electric slide rail 8 drive the parts on them to move and approach each other. When the opposite sides of the two hydraulic shells 11 come into contact, at this time, the adjusting rod 41 has not yet contacted the adjacent telescopic ends on the double-direction elastic telescopic rod 9. The staff closes the second electric slide rail 8 and starts the two first electric push rods 6. The telescopic ends of the two first electric push rods 6 jointly drive the lifting frame 7 to move upward. When the telescopic end of the first telescopic rod 12 on the upper side of the hydraulic shell 11 is located between the two adjusting plates 52, the staff closes the first electric push rod 6, and the lifting frame 7 and the parts on it no longer move, preventing the Bourdon tube from descending too far and causing the Bourdon tube to shift during the descent and fail to fall onto the first telescopic rod 12, affecting subsequent processing.

[0040] After the above-mentioned lifting frame 7 stops moving, the staff pushes the Bourdon tube on the feeding frame 5 to move to the right. When the rightmost Bourdon tube is above the through groove on the feeding frame 5, the staff stops pushing the Bourdon tube. At this time, the rightmost Bourdon tube loses support and moves downward. When the Bourdon tube contacts the telescopic ends of the two first telescopic rods 12 on the upper side, the Bourdon tube stops moving. At this time, the staff starts the second electric slide rail 8 again to make the two sliders on it approach each other. Since the two hydraulic shells 11 are in contact, the connecting pipe 10 and the parts on it no longer move. The two sliders on the second electric slide rail 8 drive the adjacent adjusting rods 41 to move and stretch the tension springs between the adjacent connecting pipes 10. When the adjusting rod 41 contacts the adjacent telescopic end of the double-direction elastic telescopic rod 9, the adjusting rod 41 squeezes it, causing the hydraulic oil in the fixed part of the double-direction elastic telescopic rod 9 to enter the two connecting pipes 10. The hydraulic oil in the connecting pipes 10 enters the fixed parts of the three first telescopic rods 12 on it through the adjacent hydraulic shells 11, causing the telescopic ends of the first telescopic rods 12 to extend and push the Bourdon tube upward. When the telescopic ends of the three first telescopic rods 12 on the same side all contact the inner side of the Bourdon tube, the telescopic ends of the first telescopic rods 12 no longer move and complete the preliminary fixing of the Bourdon tube, thereby determining the center of the Bourdon tube and preventing the center of the Bourdon tube from being unable to be determined when moving the Bourdon tube, resulting in an offset when the Bourdon tube is placed in the groove of the joint, causing the distance between the Bourdon tube and the edge of the joint groove to be uneven, and further affecting the welding strength between the subsequent Bourdon tube and the joint.

[0041] During the process of the telescopic end of the first telescopic rod 12 extending above, the gas in the fixed part of the front first telescopic rod 12 enters the fixed part of the adjacent second elastic telescopic tube 25 through the hose, causing the telescopic end of the second elastic telescopic tube 25 to extend and drive the adjacent positioning plate 26 to move synchronously, so as to adapt to the diameter change of the Bourdon tube and avoid the misalignment between the positioning plate 26 and the end of the Bourdon tube, resulting in the positioning plate 26 being unable to calibrate the Bourdon tube. When the telescopic end of the first telescopic rod 12 stops extending, the positioning plate 26 stops moving.

[0042] After the preliminary fixing of the Bourdon tube is completed above, as the two sliders of the second electric slide rail 8 continue to move, the hydraulic oil in the fixed part of the bidirectional elastic telescopic rod 9 enters the two first elastic telescopic rods 21 at this time. The telescopic ends of the first elastic telescopic rods 21 drive the adjacent pressing rings 22 to move, making the pressing rings 22 approach the adjacent two arc-shaped frames 24. When the two inclined surfaces on the pressing rings 22 respectively contact the arc-shaped frames 24, the inclined surfaces on the pressing rings 22 press the adjacent arc-shaped frames 24 (taking the arc-shaped frame 24 on the front side of the left part as an example). The arc-shaped frame 24 drives the parts on it to rotate clockwise and compress the adjacent spring ( Figure 1 viewpoint, looking from right to left). During the rotation of the arc-shaped frame 24, when the positioning plate 26 contacts the adjacent end of the Bourdon tube, the positioning plate 26 presses the adjacent end of the Bourdon tube, causing the Bourdon tube to move synchronously for calibration. The Bourdon tube rotates and there is relative movement with the telescopic end of the first telescopic rod 12. When the arc-shaped frame 24 contacts the adjacent connecting block 23, the arc-shaped frame 24 and the parts on it stop moving. At this time, both positioning plates 26 on the same connecting pipe 10 contact the Bourdon tube, thus completing the preliminary calibration of the Bourdon tube, making the angles of the ends of the Bourdon tube unified, and avoiding the deviation of the angles of the ends of the Bourdon tube when placing the Bourdon tube in the joint groove, which affects the accuracy of the placement of the Bourdon tube. At this time, when the two sliders of the second electric slide rail 8 both move to the limit positions of their upper chutes, the staff turns off the second electric slide rail 8, and the adjusting rod 41 no longer presses the adjacent telescopic ends of the bidirectional elastic telescopic rod 9, and the telescopic ends of the first elastic telescopic rods 21 stop moving.

[0043] After the preliminary calibration of the Bourdon tube is completed as described above, the staff activates the second electric push rod 54. The telescopic end of the second electric push rod 54 pushes the second electric slide rail 8 forward. The second electric slide rail 8 drives the parts thereon forward, bringing the Bourdon tube closer to the groove of the joint. When the two inclined surfaces on the U-shaped frame 53 respectively contact the adjacent adjusting plates 52, the inclined surfaces on the U-shaped frame 53 squeeze the adjacent adjusting plates 52, causing the two adjusting plates 52 to approach each other and compress the adjacent springs. During the movement of the adjusting plates 52, if the Bourdon tube is offset (taking the example of skewing to the right), when the right adjusting plate 52 contacts the Bourdon tube, the adjusting plate 52 pushes the Bourdon tube to move left until both adjusting plates 52 contact the Bourdon tube. At this time, the inclined surfaces on the U-shaped frame 53 separate from the adjacent adjusting plates 52, and the two adjusting plates 52 stop moving, and the Bourdon tube stops moving, thus completing the calibration of the Bourdon tube, avoiding the Bourdon tube from skewing to one side, resulting in the front end of the Bourdon tube being unable to enter the groove of the joint, and causing the front end of the Bourdon tube to be unable to be welded to the joint. At this time, both adjusting plates 52 separate from the adjacent inclined surfaces on the U-shaped frame 53.

[0044] During the process of pushing the Bourdon tube forward as described above, when the front end of the Bourdon tube aligns with the groove of the joint, the staff turns off the second electric push rod 54 to stop the Bourdon tube from moving forward. Then the staff activates the first electric push rod 6, causing the lifting frame 7 to drive the parts thereon to reset downward. During this process, when the telescopic end of the third elastic telescopic rod 31 contacts the fixed shell 3, as the telescopic end of the third elastic telescopic rod 31 is squeezed, the hydraulic oil in the fixed part of the third elastic telescopic rod 31 enters the fixed part of the adjacent second telescopic tube 32, causing the telescopic end of the second telescopic tube 32 to push the adjacent sealing ring 33 to move, thereby causing the sealing ring 33 to release the seal of the fixed part of the adjacent second elastic telescopic tube 25, reducing the air pressure in the fixed part of the second elastic telescopic tube 25. The telescopic end of the second elastic telescopic tube 25 drives the parts thereon to retract and release the fixation of the Bourdon tube, avoiding the positioning plate 26 from blocking the front end of the Bourdon tube, resulting in the front end of the Bourdon tube being unable to enter the groove of the joint.

[0045] As the Bourdon tube continues to move downward, when the end on the front side of the Bourdon tube enters the groove of the joint, the operator closes the lifting frame 7 to stop driving the Bourdon tube to move. Then, the electric induction coil on the welding frame 4 is started to heat the connection between the Bourdon tube and the joint and simultaneously convey solder to this place. When the welding is completed, the operator closes the electric induction coil and cools down the welded part through the existing cooling device. After the cooling is completed, the operator starts the second electric slide rail 8, and the slider on the second electric slide rail 8 drives the movement thereon to reset. The telescopic end of the bidirectional elastic telescopic rod 9 moves to reset, so as to pump out the hydraulic oil in the first telescopic rod 12 and the first elastic telescopic rod 21, and make the telescopic end of the first telescopic rod 12 and the extrusion ring 22 move to reset. During this process, the pressing force of the U-shaped frame 53 on the two adjusting plates 52 gradually decreases, and the adjusting plates 52 are gradually reset under the push of the adjacent springs until the slider on the second electric slide rail 8 is reset, and the device is reset. The operator starts the first electric slide rail 2 to drive the fixed shell 3 with the welded joint to move to the right to reset. Then, the operator replaces other joints to be welded and repeats the above process for welding.

[0046] When the existing device welds the connection between the joint and the Bourdon tube, most of the time, the solder is directly added to the weld seam, and then the solder is heated and melted, so that the melted solder flows along the gap between the Bourdon tube and the joint groove, thereby filling the weld seam between the joint and the Bourdon tube. However, during this process, due to the presence of air in the groove of the joint, when the solder fills the gap, the gas in the groove will be discharged from the weld seam, and at the same time, the gas moves upward through the solder, resulting in bubbles in the solder, which affects the welding strength of the weld seam.

[0047] Embodiment 2: On the basis of Embodiment 1, in combination with Figures 10-12 As shown, it further includes an exhaust mechanism. The exhaust mechanism is used to discharge the gas inside the material. The exhaust mechanism is arranged on the first electric slide rail 2. The exhaust mechanism includes an extrusion block 61. The extrusion block 61 is fixedly connected to the right part of the front side of the first electric slide rail 2. A slope is arranged on the left side of the extrusion block 61. A transmission plate 62 is slidably connected to the front side of the fixed shell 3. A spring is arranged between the transmission plate 62 and the fixed shell 3. The spring is in a compressed state initially. The transmission plate 62 is in extrusion fit with the slope on the extrusion block 61. Initially, the slope on the extrusion block 61 extrudes the transmission plate 62. The upper part of the transmission plate 62 is fixedly connected with a ventilation pipe 63. The front end of the ventilation pipe 63 is externally connected with an air pump. The ventilation pipe 63 is used to extract the gas inside the joint. A through hole is arranged on the front side of the fixed shell 3. When placing the joint, the slope on the extrusion block 61 pushes the transmission plate 62 forward, so that the rear end of the ventilation pipe 63 is located in the through hole of the fixed shell 3, which is convenient for the operator to place the joint.

[0048] In combination with Figure 11 and Figure 12As shown, a sealing plug 71 is slidably connected to the middle of the vent pipe 63. A spring is provided between the sealing plug 71 and the transmission plate 62. The sealing plug 71 is in sealing fit with the fixed shell 3. The diameter of the side of the sealing plug 71 close to the fixed shell 3 is smaller than that of the other side, which is used to facilitate the sealing plug 71 to enter the through hole of the fixed shell 3, so that the sealing plug 71 seals the through hole of the fixed shell 3, so that the vent pipe 63 can extract air from the joint as much as possible.

[0049] After the joint is placed in the fixed shell 3 as described above, the staff connects the front end of the vent pipe 63 to the air pump, and then starts the first electric slide rail 2 to make the fixed shell 3 drive the parts on it to move leftward repeatedly. During this process, as the fixed shell 3 drives the transmission plate 62 and the parts on it to move leftward, when the transmission plate 62 contacts the inclined surface on the left side of the extrusion block 61, the extrusion force of the extrusion block 61 on the transmission plate 62 decreases. The transmission plate 62 drives the parts on it to move backward under the push of the adjacent spring, so that the rear end of the vent pipe 63 passes through the through hole on the fixed shell 3 and enters the hole of the joint. When the transmission plate 62 separates from the inclined surface on the extrusion block 61, the transmission plate 62 and the parts on it stop moving. At this time, the sealing plug 71 fits with the edge of the through hole on the fixed shell 3.

[0050] During the above welding process, the staff starts the air pump to extract the gas in the vent pipe 63. At this time, the pressure in the joint hole decreases, causing the sealing plug 71 to move backward and stretch the adjacent spring. The inclined surface of the sealing plug 71 is squeezed against the edge of the through hole on the fixed shell 3 and deforms, thus sealing the through hole on the fixed shell 3, enabling the vent pipe 63 to extract air from the hole of the joint, creating a downward flow trend of the air in the joint, and further reducing the amount of gas flowing upward through the joint groove. As a result, the melted solder can directly enter the gap between the joint groove and the Bourdon tube, reducing the formation of bubbles when the gas moves upward through the solder, which affects the welding strength between the groove and the Bourdon tube. Until the welding is completed, the staff turns off the air pump, and the sealing plug 71 moves forward and resets under the pull of the adjacent spring, preventing the gas in the joint hole from being unable to be discharged when the melted solder enters the gap, resulting in the air in the joint being discharged from the weld when the solder enters the weld, causing bubbles to appear near the weld and affecting the quality after welding.

[0051] When cooling the welding position as described above, the staff member restarts the air pump to introduce gas into the joint hole through the air pipe 63, so that the gas contacts through the welding position inside the joint, enabling better heat dissipation at the welding point inside the joint. During this process, since the other end of the Bourdon tube is sealed, the gas in the joint hole cannot be discharged, increasing the pressure in the joint hole. The gas pushes the sealing plug 71 forward to compress the adjacent spring, causing the gas to be discharged from the gap between the through hole on the fixed housing 3 and the sealing plug 71. After the cooling is completed, the staff member turns off the air pump, and the sealing plug 71 moves backward and resets under the push of the adjacent spring. Then, the staff member starts the first electric slide rail 2 to move the fixed housing 3 and the parts thereon to the right to reset. When the transmission plate 62 contacts the inclined surface on the extrusion block 61, the inclined surface on the extrusion block 61 pushes the transmission plate 62 and the parts thereon forward until the transmission plate 62 contacts the flat surface on the front side of the extrusion block 61 and the transmission plate 62 stops moving. The air pipe 63 is removed from the hole of the joint. The staff member takes out the welded joint and replaces it with other joints to be welded.

[0052] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. An instrument positioning and welding device for instrument production, comprising a support base (1), a first electric slide rail (2) is fixedly connected to the upper side of the support base (1), a slider is arranged in the first electric slide rail (2), and a fixed shell (3) is fixedly connected to the slider. A welding frame (4) and a feeding frame (5) are fixedly connected to one side of the support base (1) close to the fixed shell (3). Symmetrically distributed first electric push rods (6) are fixedly connected to one side of the support base (1) far from the first electric slide rail (2), and the telescopic ends of the symmetrically distributed first electric push rods (6) are jointly fixedly connected to a lifting frame (7), and the lifting frame (7) is slidably connected to the support base (1). It is characterized in that: It further includes a second electric slide rail (8), the second electric slide rail (8) is slidably connected to the upper side of the lifting frame (7), the second electric slide rail (8) is fixedly connected with a bidirectional elastic telescopic rod (9), the second electric slide rail (8) is provided with symmetrically distributed sliders, and the facing sides of the symmetrically distributed sliders are both slidably connected with a connecting pipe (10). A tension spring is arranged between the connecting pipe (10) and the adjacent slider. The connecting pipe (10) is communicated with the fixed part of the bidirectional elastic telescopic rod (9) through a hose. The facing ends of the symmetrically distributed connecting pipes (10) are both fixedly connected and communicated with a hydraulic shell (11). The hydraulic shell (11) is fixedly connected and communicated with circumferentially distributed first telescopic rods (12). An adjusting mechanism for driving the adjacent hydraulic shell (11) to rotate is arranged on the connecting pipe (10), and an aligning mechanism for aligning materials is arranged on the feeding frame (5); The adjusting mechanism includes a first elastic telescopic rod (21), the first elastic telescopic rod (21) is fixedly connected to the adjacent connecting pipe (10), the fixed part of the first elastic telescopic rod (21) is communicated with the adjacent connecting pipe (10) through a hose, the telescopic end of the first elastic telescopic rod (21) is fixedly connected with a pressing ring (22), one end of the connecting pipe (10) close to the adjacent hydraulic shell (11) is fixedly connected with a connecting block (23), the connecting block (23) is slidably connected with symmetrically distributed arc-shaped frames (24), the arc-shaped frames (24) are in pressing fit with the adjacent pressing rings (22), a spring is arranged between the arc-shaped frames (24) and the adjacent connecting blocks (23), the side of the arc-shaped frame (24) far from the adjacent connecting pipe (10) is fixedly connected with a second elastic telescopic pipe (25), the fixed part of the second elastic telescopic pipe (25) far from the bidirectional elastic telescopic rod (9) is communicated with the fixed part of the adjacent first telescopic rod (12) through a hose. The circumferentially distributed first telescopic rods (12) are all provided with through holes, and one-way valves are arranged in the through holes of the first telescopic rods (12) communicated with the adjacent second elastic telescopic pipes (25). The fixed parts of the adjacent and symmetrically distributed second elastic telescopic pipes (25) are jointly communicated through a hose. The telescopic end of the second elastic telescopic pipe (25) is fixedly connected with a positioning plate (26), and a reset assembly is arranged on the positioning plate (26) far from the bidirectional elastic telescopic rod (9). The reset assembly is used for resetting the adjacent second elastic telescopic pipes (25); The alignment mechanism includes symmetrically distributed fixing plates (51). The symmetrically distributed fixing plates (51) are all slidably connected to the inside of the feeding rack (5). A tension spring is provided between the fixing plate (51) and the feeding rack (5). Symmetrically distributed adjusting plates (52) are slidably connected to the lower side of the feeding rack (5). A spring is provided between the adjusting plate (52) and the feeding rack (5). The second electric slide rail (8) is fixedly connected with a U-shaped frame (53). The symmetrically distributed adjusting plates (52) are all in extrusion fit with the U-shaped frame (53). The lifting rack (7) is fixedly connected with a second electric push rod (54). The telescopic end of the second electric push rod (54) is fixedly connected with the second electric slide rail (8).

2. The instrument positioning and welding device for instrument production according to claim 1, wherein: The diameter of the fixed part of the second elastic telescopic tube (25) is smaller than the diameter of the fixed part of the first telescopic rod (12).

3. The instrument positioning and welding device for instrument production according to claim 2, wherein: The reset assembly includes a third elastic telescopic rod (31). The third elastic telescopic rod (31) is fixedly connected to the side of the adjacent positioning plate (26) close to the bi-directional elastic telescopic rod (9). The telescopic end of the third elastic telescopic rod (31) is in extrusion fit with the fixed shell (3). A second telescopic tube (32) is fixedly connected to the fixed part of the second elastic telescopic tube (25) communicated with the adjacent first telescopic rod (12). The fixed part of the second telescopic tube (32) is communicated with the fixed part of the adjacent third elastic telescopic rod (31) through a hose. The telescopic end of the second telescopic tube (32) is fixedly connected with a sealing ring (33).

4. The instrument positioning and welding device for instrument production according to claim 3, characterized in that: A through hole is provided in the fixed part of the second elastic telescopic tube (25) far from the bi-directional elastic telescopic rod (9). The through hole is in sealing fit with the through hole of the adjacent sealing ring (33), and the height of the sealing ring (33) is greater than the diameter of the through hole.

5. The instrument positioning and welding device for instrument production according to claim 4, wherein: The slider of the second electric slide rail (8) is threadedly connected with an adjusting rod (41). The two telescopic ends of the bi-directional elastic telescopic rod (9) are respectively in extrusion fit with the adjacent adjusting rod (41).

6. The instrument positioning and welding device for instrument production according to claim 1, characterized in that: It further includes an exhaust mechanism for exhausting the gas inside the material. The exhaust mechanism is arranged on the first electric slide rail (2). The exhaust mechanism includes a pressing block (61). The pressing block (61) is fixedly connected to the side of the first electric slide rail (2) far from the lifting rack (7). A transmission plate (62) is slidably connected to the side of the fixed shell (3) close to the pressing block (61). A spring is provided between the transmission plate (62) and the fixed shell (3). The transmission plate (62) is in extrusion fit with the pressing block (61). A ventilation pipe (63) is fixedly connected to the upper part of the transmission plate (62).

7. An instrument positioning and welding device for instrument production according to claim 6, characterized in that: A sealing plug (71) is slidably connected to the middle of the ventilation pipe (63). A spring is provided between the sealing plug (71) and the transmission plate (62). The sealing plug (71) is in sealing fit with the fixed shell (3).

8. The instrument positioning and welding device for instrument production according to claim 7, wherein: The diameter of the side of the sealing plug (71) close to the fixed shell (3) is smaller than the diameter of the other side.

Images