A thermocouple processing production line

Abstract

The invention discloses a thermocouple processing production line, and relates to the technical field of thermocouple processing and assembly. The invention arranges four major parts, namely a first assembly platform, a second assembly platform, a third assembly platform and a fourth assembly platform, in a streamlined manner, drives a plurality of carriers to move cyclically by means of guide rails and belt conveyors, and cooperates with elastic clamps to clamp positive and negative electrode wires, so as to complete the processing and assembly of various metal parts during the movement, thereby effectively improving the processing and assembly production efficiency of thermocouple products. In addition, during the processing and assembly process, two types of temperature-sensitive metal thin rods are coiled, straightened and cut in the production line, and then welded to the negative electrode wire in turn. Compared with the method of first welding into components and then loading and welding with the negative electrode wire in the prior art, a large number of intermediate processes can be saved, which is beneficial to reducing the cost of manpower and equipment, and to a certain extent improves the stability and production efficiency of product production.

Description

Technical Field

[0001] The invention relates to the technical field of thermocouple processing and assembly, and in particular to a thermocouple processing production line. Background Art

[0002] A thermocouple is a measuring element that generates voltage and current through temperature difference, thereby measuring temperature or sending a signal.

[0003] During the processing and production, the thermocouples in the prior art are usually assembled manually by workers, or assembled, welded and tested by semi-automated equipment. The processing process has the disadvantages of low production efficiency, high product defect rate, high work intensity of workers and poor working environment. Especially when processing and assembling the temperature-sensitive metal rods, the prior art usually welds two temperature-sensitive metal rods into an assembly, and then loads the rods and transports them to the thermocouple processing production line for welding with the wires. The intermediate process is complicated, and the processing and assembly welding of the two temperature-sensitive metal rods and the wires cannot be directly completed during the assembly process on the production line, resulting in poor product production stability and easily causing serious impact on product production efficiency.

[0004] Therefore, a thermocouple processing production line is proposed to solve some problems existing in the above-mentioned prior art. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art that it is difficult to achieve fully automated assembly during the processing and production of thermocouple products, and that the production stability is poor and the production efficiency is low when assembling and welding two different temperature-sensitive metal thin rods, and to propose a thermocouple processing production line.

[0006] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] A thermocouple processing production line comprises a first assembly platform, a second assembly platform, a third assembly platform and a fourth assembly platform which are arranged in sequence, two first feeders are connected to the outside of the first assembly platform in sequence, a wire stripping mechanism corresponding to the first feeder is installed on the first assembly platform, two second feeders and a first vibrating feeding tray are connected to the outside of the second assembly platform in sequence, a third feeder and two fourth feeders are connected to the outside of the third assembly platform in sequence, a second vibrating feeding tray is connected to the outside of the fourth assembly platform, the first assembly platform, the second assembly platform, the third assembly platform and A guide rail is installed in the middle of the fourth assembly platform, a carrier is slidably installed in the guide rail, and an elastic clamp is installed on the top of the carrier, a servo transport mechanism is installed below the guide rail, belt conveyors are arranged side by side on the outside of the guide rail, and a motor drive mechanism is installed at the end of the belt conveyor, an output conveyor belt is installed at the end of the fourth assembly platform, and an electric grabbing mechanism arranged between the output conveyor belt and the guide rail is installed on the fourth assembly platform, a straightening mechanism corresponding to the wire stripping mechanism is installed between the first unloader and the first assembly platform, and a straightening mechanism is also installed between the fourth unloader and the third assembly platform;

[0008] The area corresponding to the first assembly platform is used to complete the automatic loading, fixed-length cutting and stripping of the positive and negative wires, the area corresponding to the second assembly platform is used to complete the automatic loading, assembly, welding and assembly position detection of the positive and negative wires and the corresponding terminals and terminal protective plastic caps, the area corresponding to the third assembly platform is used to complete the automatic loading, fixed-length cutting, assembly, welding and welding strength detection of the two temperature-sensitive metal rods of the insulating protection box, and the area corresponding to the fourth assembly platform is used to complete the automatic loading of the temperature-sensitive positioning tube and the assembly, positioning, welding and welding strength detection of the positive and negative wires.

[0009] Preferably, a pneumatic rotating table is rotatably mounted on the top of the carrier, and the elastic clamp is fixedly mounted on the pneumatic rotating table.

[0010] Preferably, the straightening mechanism includes a bracket, and a cylinder frame is fixedly mounted on the bracket, circular plates coaxially arranged therewith are fixedly mounted at the front and rear ends of the cylinder frame, and a circular hole is arranged at the center position of the circular plate, a plurality of surrounding clamping blocks are installed in the cylinder frame, and the clamping blocks are slidably mounted in the cylinder frame toward the central axis of the cylinder frame, and one end of the clamping block close to the central axis of the cylinder frame is arranged as a fan-shaped structure.

[0011] Preferably, a first gear rod corresponding to the multiple clamping blocks is slidably installed on the side of the circular plate away from the cylinder frame, and a sliding groove adapted to the sliding trajectories of the multiple first gear rods is opened on the circular plate. The first gear rod passes through the sliding groove and is fixedly connected to the corresponding clamping block. A first gear corresponding to the multiple first gear rods is rotatably installed on the circular plate, and the first gear is meshed with the corresponding first gear rod. The thickness of the first gear is set to twice the thickness of the first gear rod, and a gear ring meshing with the numerous first gears is rotatably installed on the outer side of the circular plate.

[0012] Preferably, an annular shell coaxially arranged therewith is fixedly mounted on the outer side of the circular plate, and an inner ring fixedly connected to the gear ring is rotatably mounted on the inner side of the annular shell, the annular shell and the inner ring are movably sealed and connected, an arc-shaped valve block slidably mounted in the annular shell is fixed on the inner ring, and the outer size of the arc-shaped valve block is matched with the inner size of the annular shell, one end of the annular shell passes through the outside, and the other end of the annular shell is fixedly connected to a hydraulic oil pipe, and the hydraulic oil pipe is externally connected to a hydraulic oil pump.

[0013] Preferably, an electromagnetic slide rail parallel to the cylinder frame is fixedly installed above the bracket, and a laser cutting head pointing vertically to the central axis of the cylinder frame is fixedly installed on the sliding end of the electromagnetic slide rail, and the clamping block between the laser cutting head and the central axis of the cylinder frame is made of high-transmittance glass.

[0014] Preferably, a laser rangefinder fixed on the first assembly platform is installed on the side of the straightening mechanism away from the first unloader, and the laser rangefinder is located on the central axis of the cylinder frame.

[0015] Preferably, a cylinder shell is fixedly sleeved on the outer side of the cylinder frame, and a through groove corresponding to the laser cutting head is opened on the top of the cylinder shell, an air pipe is fixedly connected to the outer end wall of the cylinder shell, and the air pipe is externally connected to a dust extraction device.

[0016] Preferably, a base is fixed on the side of the bracket close to the first discharger, and two symmetrically arranged clamping wheels are installed on the top of the base. A surrounding annular groove is provided on the cylindrical surface of the clamping wheel, and two up-and-down symmetrical annular inclined surfaces are provided in the annular groove. The angle between the two annular inclined surfaces is set to 120°, and the center point between the two annular grooves is on the central axis of the cylinder frame.

[0017] Preferably, grooves are provided on both sides of the top of the base, and sliders are slidably installed in the grooves, two clamping wheels are rotatably installed on the tops of the two sliders respectively, a second gear arranged between the two sliders is rotatably installed on the top of the base, and a second gear rod meshing with the second gear is fixedly installed on the two sliders, the two second gear rods are symmetrically arranged around the center axis of the second gear, and a spring for elastically supporting the slider is fixedly installed in the groove.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, the first assembly platform, the second assembly platform, the third assembly platform and the fourth assembly platform are arranged in a streamlined manner, and a plurality of carriers are driven to move cyclically by means of guide rails and belt conveyors, and the positive and negative electrode wires are clamped by elastic clamps, and the processing and assembly of each metal component are completed during the movement, which can effectively improve the efficiency of the processing and assembly production of thermocouple products. The four parts are interconnected and independent of each other, which is convenient for debugging and maintenance. In the processing and assembly process, the two types of temperature-sensitive metal thin rods are welded to the negative electrode wire in turn after coil loading, straightening and cutting in the production line. Compared with the method of welding into components first and then loading and welding with the negative electrode wire in the prior art, a large number of intermediate processes can be saved, which is conducive to reducing the manpower and equipment costs, and to a certain extent improves the stability and production efficiency of product production. In addition, the production line can process positive and negative electrode wires and temperature-sensitive metal thin rods of different lengths according to actual production needs, and can adapt to the assembly of different temperature-sensitive positioning tubes, different terminals and terminal protection plastic caps, and has the advantages of a wide range of production applications;

[0020] 2. In the present invention, the arc valve block can be driven to move in the ring shell through an external hydraulic oil pump, driving the ring shell to rotate, and then driving the gear ring to rotate, and then by means of the meshing of the gear ring with a plurality of first gears, and the meshing of a plurality of first gears with corresponding first gear rods, a plurality of surrounding clamping blocks are driven to move synchronously toward the central axis of the cylinder frame, and the wire is accurately clamped at the central axis position of the cylinder frame, and the entire portion of the wire to be cut is directly straightened by extrusion and clamping, with good straightening effect, which can effectively improve the accuracy of wire straightening;

[0021] 3. In the present invention, by setting the laser cutting head just above the straightening mechanism and controlling its movement with the help of an electromagnetic slide rail, a clamping block made of high-transmittance glass is arranged between the central axis of the cylinder frame and the laser cutting head, so that the laser beam emitted from the laser cutting head can act on the wire on the center axis of the cylinder frame during the clamping and correction process of the clamping block, so that the wire can be positioned and cut in a high-precision straight line state, which can effectively improve the length accuracy of the positive and negative conductors formed after the wire cutting, as well as the length accuracy of the temperature-sensitive metal thin rod formed after the metal coil cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 A perspective view of the present invention;

[0024] Figure 2A three-dimensional diagram of the structure on the first assembly platform of the present invention;

[0025] Figure 3 A three-dimensional diagram of the structure on the second assembly platform of the present invention;

[0026] Figure 4 For the present invention Figure 3 The enlarged view of point A in the middle;

[0027] Figure 5 A three-dimensional diagram of the structure on the third assembly platform of the present invention;

[0028] Figure 6 A three-dimensional diagram of the structure on the fourth assembly platform of the present invention;

[0029] Figure 7 It is a stereoscopic diagram of the straightening mechanism of the present invention from the front perspective;

[0030] Figure 8 It is a three-dimensional diagram of the straightening mechanism of the present invention from the back side perspective;

[0031] Fig. 9 The figure is a disassembled diagram of the cylinder frame, the clamping block, the ring shell and the inner ring of the present invention;

[0032] Fig.10 This is a disassembled diagram of the base, the slider and the clamping wheel of the present invention;

[0033] Fig.11 is a side cross-sectional view of the straightening mechanism of the present invention;

[0034] Fig.12 is a top view of the straightening mechanism of the present invention;

[0035] Fig.13 For the present invention Fig.12 Cross-section at the middle BB;

[0036] Fig.14 For the present invention Fig.12 Sectional view at CC;

[0037] Fig.15 For the present invention Fig.12 Sectional view at DD in the middle;

[0038] Fig.16 For the present invention Fig.12 Cross-sectional view at EE in the middle.

[0039] Serial number in the picture:

[0040] 1. First assembly platform; 101. First unloading machine; 102. Wire stripping mechanism;

[0041] 2. Second assembly platform; 201. Second unloading machine; 202. First vibration loading tray;

[0042] 3. The third assembly platform; 301. The third unloading machine; 302. The fourth unloading machine;

[0043] 4. Fourth assembly platform; 401. Second vibration loading tray; 402. Output conveyor belt; 403. Electric grabbing mechanism;

[0044] 5. Guide rail; 501. Carrier; 502. Elastic clamp; 503. Belt conveyor; 504. Pneumatic rotary table;

[0045] 6. Straightening mechanism; 601. Bracket; 602. Cylinder frame; 603. Circular plate; 604. Clamping block; 605. First gear rod; 606. First gear; 607. Gear ring; 608. Ring shell; 609. Inner ring; 610. Arc valve block; 611. Hydraulic oil pipe;

[0046] 7. Electromagnetic slide rail; 701. Laser cutting head; 702. Laser rangefinder; 703. Cylinder shell; 704. Air pipe;

[0047] 8. Base; 801. Groove; 802. Sliding block; 803. Clamping wheel; 804. Ring groove; 805. Second gear; 806. Second gear rod; 807. Spring. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0049] Embodiment: This embodiment provides a thermocouple processing production line, see Figure 1 - Fig.16Specifically, it includes a first assembly platform 1, a second assembly platform 2, a third assembly platform 3 and a fourth assembly platform 4 which are arranged in sequence, two first unloading machines 101 are connected to the outer side of the first assembly platform 1 in sequence, and a wire stripping mechanism 102 corresponding to the first unloading machine 101 is installed on the first assembly platform 1, two second unloading machines 201 and a first vibrating loading tray 202 are connected to the outer side of the second assembly platform 2 in sequence, a third unloading machine 301 and two fourth unloading machines 302 are connected to the outer side of the third assembly platform 3 in sequence, and a second vibrating loading tray 401 is connected to the outer side of the fourth assembly platform 4, and a guide rail 5 is installed in the middle of the first assembly platform 1, the second assembly platform 2, the third assembly platform 3 and the fourth assembly platform 4, and a load carrier is slidably installed in the guide rail 5. A carrier 501 is provided with an elastic clamp 502 on the top of the carrier 501, a servo transport mechanism is provided under the guide rail 5, belt conveyors 503 are arranged side by side on the outside of the guide rail 5, and a motor drive mechanism is provided at the end of the belt conveyor 503, a pneumatic rotary table 504 is rotatably installed on the top of the carrier 501, the elastic clamp 502 is fixedly installed on the pneumatic rotary table 504, an output conveyor belt 402 is installed at the end of the fourth assembly platform 4, an electric grabbing mechanism 403 arranged between the output conveyor belt 402 and the guide rail 5 is installed on the fourth assembly platform 4, a straightening mechanism 6 corresponding to the wire stripping mechanism 102 is installed between the first unloader 101 and the first assembly platform 1, and a straightening mechanism 6 is also installed between the fourth unloader 302 and the third assembly platform 3.

[0050] When the device is in operation, the staff can use the device to carry out fully automated processing and assembly production of thermocouple products. Under normal circumstances, thermocouple products are usually composed of positive wire, negative wire, positive terminal, negative terminal, terminal protection plastic cap, insulating protective cover, two temperature-sensitive metal thin rods, and temperature-sensitive positioning tube. In the device, the area corresponding to the first assembly platform 1 is used to complete the automatic loading, fixed-length cutting and stripping of the positive and negative wires, and the area corresponding to the second assembly platform 2 is used to complete the automatic loading, assembly, welding and assembly position detection of the positive and negative wires and the corresponding terminals and terminal protection plastic caps, the area corresponding to the third assembly platform 3 is used to complete the automatic loading, fixed-length cutting, assembly, welding and welding strength detection of the insulating protection cover and two temperature-sensitive metal thin rods, and the area corresponding to the fourth assembly platform 4 is used to complete the automatic loading of the temperature-sensitive positioning tube and the assembly, positioning, welding and welding strength detection of the positive and negative wires.

[0051] The guide rail 5 is inserted between the first assembly platform 1, the second assembly platform 2, the third assembly platform 3 and the fourth assembly platform 4, and is driven by a servo conveying mechanism to transport the numerous carriers 501 loaded thereon from right to left. A servo conveying mechanism is also connected between the guide rail 5 and the end of the belt conveyor 503, which can transport the carrier 501 between the guide rail 5 and the end of the belt conveyor 503. When the carrier 501 moves to the end position of the guide rail 5, under the operation of the servo conveying mechanism, the carrier 501 can be transferred from the guide rail 5 to the belt conveyor 503, and the empty carrier 501 is transported from left to right by the belt conveyor 503, so that the numerous carriers 501 can move back and forth between the first assembly platform 1, the second assembly platform 2, the third assembly platform 3 and the fourth assembly platform 4 with the cooperation of the guide rail 5 and the belt conveyor 503.

[0052] In actual operation, the positive and negative conductors are stored in the form of continuous coils on two first unwinding machines 101 arranged in sequence. Under the transportation of the first unwinding machine 101, the wires constituting the positive and negative conductors pass through two corresponding straightening mechanisms 6 and are transported to the first assembly platform 1. In the process of the wires passing through the straightening mechanisms 6, the originally bent wires will be straightened by the straightening mechanisms 6, and after being cut to a fixed length according to actual use requirements, they are transported to the first assembly platform 1 and clamped by the elastic clamping claws 502 installed on the carrier 501. During this process, the insulation layer of the wire ends is stripped by the wire stripping mechanism 102 installed on the first assembly platform 1. After the wire is straightened and the insulation layer of the end is stripped, a positive conductor and a negative conductor are formed. The two mutually cooperating positive and negative conductors are grasped by the same elastic clamp 502 and moved to the second assembly platform 2 driven by the carrier 501. Two columns are arranged on the elastic clamp 502, which are respectively used to control the clamping jaws of the positive conductor and the negative conductor. A pressing mechanism is installed on the assembly platform. When the clamp needs to be opened, the pressing mechanism presses down the corresponding column, and drives the corresponding clamp to open through the lever principle. When the pressing effect disappears, the corresponding clamp is closed under the reset upper push of the elastic element under the column, completing the clamping operation of the positive and negative conductors.

[0053] The positive and negative terminals are stored in the form of terminal chains on the material trays in two second unloading machines 201 arranged in sequence. Under the conveyance of the second unloading machine 201, the positive and negative terminal chains are conveyed to the second assembly platform 2. The second assembly platform 2 is integrated with a mechanism for cutting the terminal chains. After the positive and negative wires are moved to the second assembly platform 2 and aligned with the corresponding terminal chains, the positive and negative terminals are cut off from the corresponding terminal chains by the cutting mechanism and assembled to the ends of the corresponding positive and negative wires. A welding mechanism is provided, through which the positive and negative terminals are resistance-welded to the corresponding positive and negative wires. Subsequently, the positive and negative wires, driven by the carrier 501, continue to move along the guide rail 5 to the position corresponding to the first vibrating loading tray 202, and the terminal protection plastic cap is automatically loaded through the first vibrating loading tray 202. Under the assembly of the second assembly platform 2, the negative terminal and the terminal protection plastic cap are assembled together with the positive terminal, and then, driven by the carrier 501, they are transferred to the third assembly platform 3 for subsequent processing and assembly.

[0054] During the movement of the carrier 501 from the second assembly platform 2 to the third assembly platform 3, the pneumatic rotating table 504 rotatably installed on the carrier 501 will start and rotate 180°, so that the two ends of the wire clamped by the elastic clamp 502 are replaced, and one end of the positive and negative wires on which the positive and negative terminals and terminal protection plastic caps are assembled is replaced with the other end, which is convenient for assembling and producing the other vacant ends of the positive and negative wires. The insulating protective cover is in the form of a continuous coil on the third unloading machine 301, and the insulating coil is pulled out by the third unloading machine 301. A cutting mechanism for cutting the insulating coil is installed on the third assembly platform 3. The insulating coil of the required length is cut by the cutting mechanism to form an insulating protective cover, and is put into the vacant end of the negative wire. The raw materials of the two temperature-sensitive metal thin rods are also in the form of coils on the fourth On the unloading machine 302, under the conveyance of the fourth unloading machine 302, the temperature-sensitive metal coil is conveyed to the third assembly platform 3. During this process, the temperature-sensitive metal coil will pass through the straightening mechanism 6 installed between the fourth unloading machine 302 and the third assembly platform 3. The originally bent temperature-sensitive metal coil will be straightened by the straightening mechanism 6 here, and then the required length will be cut according to the demand. After the two temperature-sensitive metal coils are processed, two temperature-sensitive metal thin rods are generated. The third assembly platform 3 is integrated with an argon arc welding mechanism. With the help of the assembly of the third assembly platform 3 and the argon arc welding mechanism, the first temperature-sensitive metal thin rod is first welded to the end of the negative electrode wire, and then the second temperature-sensitive metal thin rod is welded to the first temperature-sensitive metal thin rod. Then, under the movement of the carrier 501 and the clamping of the elastic clamp 502, the positive and negative electrode wires are conveyed to the fourth assembly platform 4 for subsequent processing and assembly.

[0055] The temperature-sensitive positioning tube is automatically loaded from the second vibrating loading tray 401 to the fourth assembly platform 4. When the positive and negative wires clamped by the elastic clamp 502 are aligned with the second vibrating loading tray 401, the temperature-sensitive positioning tube is inserted into the second temperature-sensitive metal thin rod through the fourth assembly platform 4. A positioning detection mechanism is installed on the fourth assembly platform 4. The position of the top of the temperature-sensitive positioning tube relative to the second temperature-sensitive metal thin rod is precisely positioned and detected by the positioning detection mechanism. An argon arc welding mechanism is provided on the fourth assembly platform 4. When the temperature-sensitive positioning tube is aligned with the second temperature-sensitive metal thin rod, the temperature-sensitive positioning tube is inserted into the second temperature-sensitive metal thin rod through the fourth assembly platform 4. After the second temperature-sensitive metal rod is accurately positioned, the temperature-sensitive positioning tube and the second temperature-sensitive metal rod are welded and fixed by an argon arc welding mechanism, and then the positive wire is placed at the tail of the temperature-sensitive positioning tube, and the position of the positive wire relative to the temperature-sensitive positioning tube is precisely positioned and detected, and then argon arc welding is performed. A tension detection mechanism is installed on the fourth assembly platform 4, which can detect the welding strength of the temperature-sensitive positioning tube and the second temperature-sensitive metal rod. After passing the test, it is grabbed by the electric grabbing mechanism 403 and output to the output conveyor belt 402 and output outward.

[0056] The production line is composed of a first assembly platform 1, a second assembly platform 2, a third assembly platform 3 and a fourth assembly platform 4, which are arranged in a streamlined manner. The first assembly platform 1, the second assembly platform 2, the third assembly platform 3 and the fourth assembly platform 4 are driven by guide rails 5 and belt conveyors 503 to drive a plurality of carriers 501 to move cyclically, and the elastic clamps 502 clamp the positive and negative wires to complete the processing and assembly of various metal parts during the movement, which can effectively improve the efficiency of the processing and assembly production of thermocouple products. The four major parts are interconnected and independent of each other, which is convenient for debugging and maintenance, and in the processing group During the assembly process, the two types of temperature-sensitive metal rods are directly welded to the negative electrode wire after being coiled, straightened and cut in the production line. Compared with the prior art method of first welding into components and then loading and welding with the negative electrode wire, a large number of intermediate processes can be saved, which is beneficial to reducing manpower and equipment costs, and to a certain extent improves the stability and production efficiency of product production. This production line can process positive and negative electrode wires and temperature-sensitive metal rods of different lengths according to actual production needs, and can adapt to the assembly of different temperature-sensitive positioning tubes, different terminals and terminal protective plastic caps, and has the advantage of a wide range of production applications.

[0057] In the specific implementation process, Figure 7 - Fig.16As shown, the straightening mechanism 6 includes a bracket 601, and a cylinder frame 602 is fixedly installed on the bracket 601, and a circular plate 603 coaxially arranged therewith is fixedly installed at the front and rear ends of the cylinder frame 602, and a circular hole is arranged at the center position of the circular plate 603, and a plurality of surrounding clamping blocks 604 are installed in the cylinder frame 602, and the clamping blocks 604 are slidably installed in the cylinder frame 602 toward the central axis direction of the cylinder frame 602, and the end of the clamping block 604 close to the central axis of the cylinder frame 602 is arranged as a fan-shaped structure, and a first gear rod 605 corresponding to the plurality of clamping blocks 604 is slidably installed on the side of the circular plate 603 away from the cylinder frame 602, and a sliding groove adapted to the sliding trajectory of the plurality of first gear rods 605 is opened on the circular plate 603, and the first gear rod 605 passes through the sliding groove and is fixedly connected to the corresponding clamping block 604, and a plurality of first gear rods 605 corresponding to the plurality of first gear rods 605 are rotatably installed on the circular plate 603 The rods 605 correspond to the first gears 606 one by one, and the first gears 606 are meshed with the corresponding first gear rods 605. The thickness of the first gears 606 is set to be twice the thickness of the first gear rods 605. A gear ring 607 meshing with a plurality of first gears 606 is rotatably installed on the outer side of the circular plate 603. A ring shell 608 coaxially arranged therewith is fixedly installed on the outer side of the circular plate 603, and an inner ring 609 fixedly connected to the gear ring 607 is rotatably installed on the inner side of the ring shell 608. The ring shell 608 and the inner ring 609 are movably sealed and connected. An arc valve block 610 slidably installed in the ring shell 608 is fixed on the inner ring 609, and the outer size of the arc valve block 610 is adapted to the inner size of the ring shell 608. One end of the ring shell 608 passes through the outside, and the other end of the ring shell 608 is fixedly connected with a hydraulic oil pipe 611, and the hydraulic oil pipe 611 is externally connected to a hydraulic oil pump.

[0058] When the device is running, in the process of using the straightening mechanism 6 to straighten the wire or the temperature-sensitive metal coil, the wire passes through the cylinder frame 602 along the central axis of the cylinder frame 602 from one end of the straightening mechanism 6. When the wire passes through a certain length, the further conveying of the wire is stopped. At this time, the external hydraulic oil pump is started, and the hydraulic oil is filled into the annular shell 608 through the hydraulic oil pipe 611. Under the push of the hydraulic oil filling, the arc valve block 610 is driven to move to the other side in the annular shell 608. During the movement of the annular shell 608, it will drive The inner ring 609 rotates, thereby driving the gear ring 607 fixedly installed on the inner side of the inner ring 609 to rotate. During the rotation of the gear ring 607, the first gears 606 meshing with it are driven to rotate, and then the first gears 606 and the corresponding first gear rods 605 are meshed to drive the first gear rods 605 to move synchronously toward the central axis of the cylinder frame 602, thereby driving the correspondingly connected clamping blocks 604 to move synchronously toward the central axis of the cylinder frame 602. After the synchronous movement of the clamping blocks 604 arranged around the cylinder frame The wire is clamped together on the outside of the wire on the center line of the cylinder frame 602, and the wire is straightened by clamping and squeezing from all directions by a plurality of surrounding clamping blocks 604. After the wire is straightened, the hydraulic oil pump is started in the reverse direction to extract the hydraulic oil filled in the ring shell 608, so that the arc valve block 610 moves in the reverse direction and resets in the ring shell 608. With the meshing transmission between the gear ring 607 and the plurality of first gears 606 and the first gear rod 605, the plurality of clamping blocks 604 are driven synchronously to move away from the center axis of the cylinder frame 602 The wire moves in the direction of the wire, loosens the firm clamping of the wire, and then the straightened wire is pushed out through the other end of the straightening mechanism 6. The device uses the straightening mechanism 6 to set a uniform and straight extrusion force around the wire or the temperature-sensitive metal coil to perform a straightening operation. Compared with the solution of using multiple rollers to straighten the wire in the prior art, the accuracy of wire straightening can be effectively improved, which is conducive to more accurate control of the cutting length of the wire or the temperature-sensitive metal coil, and is convenient for ensuring the accuracy of the processing and assembly production of thermocouples through the device.

[0059] In the specific implementation process, Figure 7 and Fig.11 - Fig.13As shown, an electromagnetic slide rail 7 parallel to the cylinder frame 602 is fixedly installed above the bracket 601, and a laser cutting head 701 pointing vertically to the central axis of the cylinder frame 602 is fixedly installed on the sliding end of the electromagnetic slide rail 7, and the clamping block 604 between the laser cutting head 701 and the central axis of the cylinder frame 602 is made of high-transmittance glass, and a laser rangefinder 702 fixed on the first assembly platform 1 is installed on the side of the straightening mechanism 6 away from the first unloader 101, and the laser rangefinder 702 is on the central axis of the cylinder frame 602, a cylinder shell 703 is fixedly sleeved on the outer side of the cylinder frame 602, and a through groove corresponding to the laser cutting head 701 is opened on the top of the cylinder shell 703, and an air pipe 704 is fixedly connected to the outer end wall of the cylinder shell 703, and the air pipe 704 is externally connected to a dust extraction device.

[0060] When the device is in operation, when the wire or metal pipe is clamped and corrected by the numerous clamping blocks 604 arranged around it in the straightening mechanism 6, the wire is in a highly precise straight line state due to the surrounding all-round clamping restrictions. At this time, the laser rangefinder 702 located outside the end of the straightening mechanism 6 and on the central axis of the cylinder frame 602 is started, and cooperates with the electromagnetic slide rail 7 to drive the laser cutting head 701 to move, so that the wire can be accurately cut. The light beam emitted from the laser rangefinder 702 is straight to the end of the wire, and the distance between the laser rangefinder 702 and the end of the wire can be measured. When the distance between the laser rangefinder 702 and the electromagnetic slide rail 7 is constant, the distance between the laser cutting head 701 and the laser rangefinder 702 can be calculated, minus the distance between the end of the wire and the laser rangefinder 702. The distance between the laser cutting head 701 and the end of the wire can be accurately calculated. According to the needs, the laser cutting head 701 is controlled to move to a suitable position through the electromagnetic slide rail 7 to cut the wire in a high-precision straight line state. Since the clamping block 604 arranged between the central axis of the cylindrical frame 602 and the laser cutting head 701 is made of high-transmittance glass, the laser beam emitted from the laser cutting head 701 can easily pass through the clamping block 604 made of high-transmittance glass and act on the wire on the central axis of the cylindrical frame 602. Since the wire is positioned and cut in a high-precision straight line state, the length accuracy of the positive and negative electrode conductors formed after the wire cutting can be effectively improved. At the same time, the length accuracy of the temperature-sensitive metal thin rod formed after the metal coil is cut can also be effectively improved.

[0061] When using the laser cutting head 701 to cut wires or temperature-sensitive metal coils to a fixed length, the external dust extraction device is started, and through the connection of the air pipe 704, the cylinder shell 703 is evacuated. With the help of the air flow, the dust and waste gas generated by the laser cutting can be quickly extracted to prevent the waste gas and dust from polluting the surrounding environment.

[0062] In the specific implementation process, Figure 8 , Fig.10 and Fig.16 As shown, a base 8 is fixed to one side of the bracket 601 close to the first unloader 101, and two symmetrically arranged clamping wheels 803 are installed on the top of the base 8, a surrounding annular groove 804 is provided on the cylindrical surface of the clamping wheel 803, and two up-and-down symmetrical annular inclined surfaces are provided in the annular groove 804, the angle between the two annular inclined surfaces is set to 120°, the center point between the two annular grooves 804 is on the central axis of the cylindrical frame 602, grooves 801 are provided on both sides of the top of the base 8, and sliders 802 are slidably installed in the grooves 801, the two clamping wheels 803 are rotatably installed on the tops of the two sliders 802, and a second gear 805 arranged between the two sliders 802 is rotatably installed on the top of the base 8, and a second gear 805 arranged between the two sliders 802 is fixedly installed on the two sliders 802, and a second gear rod 806 meshing with the second gear 805 is fixedly installed on the two sliders 802, the two second gear rods 806 are symmetrically arranged around the central axis of the second gear 805, and a spring 807 for elastically supporting the slider 802 is fixedly installed in the groove 801.

[0063] When the device is running, the wire or temperature-sensitive metal coil will first pass through two symmetrically arranged clamping wheels 803 before entering the straightening mechanism 6 for straightening. The wire is stably clamped and confined in the annular groove 804 opened on the two clamping wheels 803. The existence of the annular groove 804 allows the wire to be stably clamped between the two clamping wheels 803. Since the center point between the annular grooves 804 on the two clamping wheels 803 is on the central axis of the cylinder frame 602, the precise stability of the wire introduction onto the central axis of the cylinder frame 602 can be effectively improved. When the two clamping wheels 803 are used to clamp and guide the wire, the wire can be stably clamped in the two clamping wheels 803. Under the elastic support of the spring 807 in the side groove 801, the sliders 802 on both sides drive the clamping wheels 803 rotatably mounted thereon to maintain a tendency to approach each other. In this process, with the help of the engagement of the second gear rod 806 symmetrically fixed on the central axis on the sliders 802 on both sides and the second gear 805 in the center position, the moving distances of the clamping wheels 803 on both sides can be kept synchronized and in relative directions, so that wires of different sizes can be stably and accurately clamped on the central axis of the cylindrical frame 602, making the device suitable for accurately and stably introducing wires of different sizes or temperature-sensitive metal coils into the straightening mechanism 6 for mechanical straightening processing.

[0064] Specifically, the working principle and operation method of the present invention are as follows:

[0065] The thermocouple processing production line of the present invention is composed of four parts: a first assembly platform 1, a second assembly platform 2, a third assembly platform 3 and a fourth assembly platform 4. In the corresponding area of ​​the first assembly platform 1, the two types of wire materials are continuous coils. The wires are led out through the cooperation of the first unwinding machine 101 and the straightening mechanism 6, and the required length is straightened and cut, and the insulation skin at the end of the negative electrode wire is peeled off, and then the elastic clamping claw 502 is used to clamp the matched positive electrode wire and the negative electrode wire. With the guidance of the guide rail 5 and the drive of the belt conveyor 503, the carrier 501 can drive the elastic clamping claw 502 to move in an orderly manner, so that the thermocouple product is processed and assembled in the process of orderly moving between the first assembly platform 1, the second assembly platform 2, the third assembly platform 3 and the fourth assembly platform 4;

[0066] In the area corresponding to the second assembly platform 2, the positive and negative terminals are cut from the terminal chains derived from the two second unloading machines 201, assembled to one end of the corresponding positive and negative wires, and resistance welding is performed, and then the terminal protection plastic cap is loaded through the first vibrating loading tray 202 and installed on the negative terminal, and the negative terminal and the plastic cap are assembled together with the positive terminal;

[0067] In the area corresponding to the third assembly platform 3, the insulating protective cover is made of continuous coils. The insulating coils are led out through the conveyance of the third unwinding machine 301, cut to the required length, and form the insulating protective cover, and then put into the other end of the negative conductor. The metal coils corresponding to the two temperature-sensitive metal thin rods are guided to the third assembly platform 3 through the fourth unwinding machine 302. In this process, the metal coils are straightened by the straightening mechanism 6 and cut to the required length. The two temperature-sensitive metal coils are made into two different temperature-sensitive metal thin rods. According to the processing requirements, the first temperature-sensitive metal thin rod is first welded to one end of the negative conductor through the third assembly platform 3, and then the second temperature-sensitive metal thin rod is welded to the first temperature-sensitive metal thin rod, and the welding method is argon arc welding;

[0068] In the area corresponding to the fourth assembly platform 4, the temperature-sensitive positioning tube is automatically loaded by the second vibrating loading plate 401, and the temperature-sensitive positioning tube is inserted into the second temperature-sensitive metal thin rod through the fourth assembly platform 4. The position of the top of the temperature-sensitive positioning tube relative to the second temperature-sensitive metal thin rod is precisely positioned and detected, and then welding is performed. The welding method is argon arc welding. The positive electrode wire is placed at the tail of the temperature-sensitive positioning tube. The position of the positive electrode wire relative to the temperature-sensitive positioning tube is precisely positioned and detected, and then welding is performed. The welding is argon arc welding, and the strength after welding will be tested by tension.

[0069] When the straightening mechanism 6 is used to straighten the wire or the temperature-sensitive metal coil, the wire is guided by two symmetrically arranged clamping wheels 803 and accurately enters the central axis position inside the cylinder frame 602. Then, driven by the external hydraulic oil pump, the arc valve block 610 drives the inner ring 609 to rotate, and then drives the gear ring 607 to rotate. With the meshing of the gear ring 607 with the plurality of first gears 606, and the meshing of the plurality of first gears 606 with the corresponding first gear rods 605, the plurality of surrounding clamping blocks 604 are driven to move synchronously toward the central axis direction of the cylinder frame 602, and the wire is accurately clamped at the central axis position of the cylinder frame 602. The wire is straightened by extrusion and clamping, and the straightening effect is good. In the straightening and clamping process, the wire is cut by the laser cutting head 701, so that the cutting accuracy of the wire or the temperature-sensitive metal coil is high, and high-precision processing, assembly and production of thermocouple products are achieved.

[0070] The 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 by the protection scope of the present invention.

Claims

1. A thermocouple processing production line, characterized in that: The invention comprises a first assembly platform (1), a second assembly platform (2), a third assembly platform (3) and a fourth assembly platform (4) which are arranged in sequence, wherein two first unloading machines (101) are connected in sequence to the outer side of the first assembly platform (1), and a wire stripping mechanism (102) corresponding to the first unloading machine (101) is installed on the first assembly platform (1), two second unloading machines (201) and a first vibrating loading tray (202) are connected in sequence to the outer side of the second assembly platform (2), a third unloading machine (301) and two fourth unloading machines (302) are connected in sequence to the outer side of the third assembly platform (3), a second vibrating loading tray (401) is connected to the outer side of the fourth assembly platform (4), and the middle position of the first assembly platform (1), the second assembly platform (2), the third assembly platform (3) and the fourth assembly platform (4) A guide rail (5) is installed, a carrier (501) is slidably installed in the guide rail (5), and an elastic clamp (502) is installed on the top of the carrier (501), a servo transport mechanism is installed below the guide rail (5), belt conveyors (503) are arranged side by side on the outer side of the guide rail (5), and a motor drive mechanism is installed at the end of the belt conveyor (503), an output conveyor belt (402) is installed at the end of the fourth assembly platform (4), and an electric grabbing mechanism (403) arranged between the output conveyor belt (402) and the guide rail (5) is installed on the fourth assembly platform (4), a straightening mechanism (6) corresponding to the wire stripping mechanism (102) is installed between the first unloader (101) and the first assembly platform (1), and a straightening mechanism (6) is also installed between the fourth unloader (302) and the third assembly platform (3); The area corresponding to the first assembly platform (1) is used to complete the automatic feeding, fixed-length cutting and stripping of the insulation layer of the positive and negative wires; the area corresponding to the second assembly platform (2) is used to complete the automatic feeding, assembly, welding and assembly position detection of the positive and negative wires and the corresponding terminals and terminal protective plastic caps; the area corresponding to the third assembly platform (3) is used to complete the automatic feeding, fixed-length cutting, assembly, welding and welding strength detection of the insulating protective sleeve and two temperature-sensitive metal thin rods; the area corresponding to the fourth assembly platform (4) is used to complete the automatic feeding of the temperature-sensitive positioning tube and the assembly, positioning, welding and welding strength detection of the positive and negative wires.

2. A thermocouple processing production line according to claim 1, characterized in that: A pneumatic rotating table (504) is rotatably mounted on the top of the carrier (501), and the elastic clamping claw (502) is fixedly mounted on the pneumatic rotating table (504).

3. A thermocouple processing production line according to claim 1, characterized in that: The straightening mechanism (6) comprises a bracket (601), and a cylindrical frame (602) is fixedly mounted on the bracket (601), and circular plates (603) coaxially arranged therewith are fixedly mounted at the front and rear ends of the cylindrical frame (602), and a circular hole is arranged at the center of the circular plate (603), and a plurality of surrounding clamping blocks (604) are installed in the cylindrical frame (602), and the clamping blocks (604) are slidably mounted in the cylindrical frame (602) in the direction of the central axis of the cylindrical frame (602), and one end of the clamping blocks (604) close to the central axis of the cylindrical frame (602) is arranged in a fan-shaped structure.

4. A thermocouple processing production line according to claim 3, characterized in that: A first gear rod (605) corresponding to a plurality of clamping blocks (604) is slidably mounted on one side of the circular plate (603) away from the cylinder frame (602); a slide groove adapted to the sliding tracks of the plurality of first gear rods (605) is provided on the circular plate (603); the first gear rod (605) passes through the slide groove and is fixedly connected to the corresponding clamping block (604); a first gear (606) corresponding to a plurality of first gear rods (605) is rotatably mounted on the circular plate (603); the first gear (606) is meshed with the corresponding first gear rod (605); the thickness of the first gear (606) is set to be twice the thickness of the first gear rod (605); a gear ring (607) meshed with the plurality of first gears (606) is rotatably mounted on the outer side of the circular plate (603).

5. A thermocouple processing production line according to claim 4, characterized in that: An annular shell (608) coaxially arranged therewith is fixedly mounted on the outer side of the circular plate (603), and an inner ring (609) fixedly connected to the gear ring (607) is rotatably mounted on the inner side of the annular shell (608). The annular shell (608) and the inner ring (609) are movably sealed and connected to each other. An arc-shaped valve block (610) slidably mounted in the annular shell (608) is fixedly mounted on the inner ring (609), and the outer size of the arc-shaped valve block (610) matches the inner size of the annular shell (608). One end of the annular shell (608) is connected to the outside, and the other end of the annular shell (608) is fixedly connected to a hydraulic oil pipe (611), and the hydraulic oil pipe (611) is externally connected to a hydraulic oil pump.

6. A thermocouple processing production line according to claim 3, characterized in that: An electromagnetic slide rail (7) arranged parallel to the cylindrical frame (602) is fixedly mounted above the bracket (601), and a laser cutting head (701) pointing vertically to the central axis of the cylindrical frame (602) is fixedly mounted on the sliding end of the electromagnetic slide rail (7), and a clamping block (604) located between the laser cutting head (701) and the central axis of the cylindrical frame (602) is made of high-transmittance glass.

7. A thermocouple processing production line according to claim 6, characterized in that: A laser distance meter (702) fixed on the first assembly platform (1) is installed on the side of the straightening mechanism (6) away from the first unloading machine (101), and the laser distance meter (702) is located on the central axis of the cylinder frame (602).

8. A thermocouple processing production line according to claim 6, characterized in that: A cylindrical shell (703) is fixedly sleeved on the outer side of the cylindrical frame (602), and a through slot corresponding to the laser cutting head (701) is opened on the top of the cylindrical shell (703). An air pipe (704) is fixedly connected to the outer end wall of the cylindrical shell (703), and the air pipe (704) is externally connected to a dust extraction device.

9. A thermocouple processing production line according to claim 3, characterized in that: A base (8) is fixed to one side of the bracket (601) close to the first unloader (101), and two symmetrically arranged clamping wheels (803) are installed on the top of the base (8), a surrounding annular groove (804) is opened on the cylindrical surface of the clamping wheel (803), and two vertically symmetrical annular inclined surfaces are arranged in the annular groove (804), the included angle of the two annular inclined surfaces is set to 120 degrees, and the center point between the two annular grooves (804) is located on the central axis of the cylindrical frame (602).

10. A thermocouple processing production line according to claim 9, characterized in that: Grooves (801) are provided on both sides of the top of the base (8), and a slider (802) is slidably mounted in the groove (801); the two clamping wheels (803) are rotatably mounted on the tops of the two sliders (802), respectively; a second gear (805) arranged between the two sliders (802) is rotatably mounted on the top of the base (8); a second gear rod (806) meshing with the second gear (805) is fixedly mounted on the two sliders (802); the two second gear rods (806) are symmetrically arranged around the central axis of the second gear (805); and a spring (807) for elastically supporting the slider (802) is fixedly mounted in the groove (801).

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