CN211727997U - A sensor-made wire automatic welding device - Google Patents

Abstract

The utility model discloses an automatic welding device for making wires of sensors, which comprises a welding device and a three-axis sliding table device. The three-axis sliding table device is arranged on a frame, and a sensor carrier is further arranged on the frame below the welding device; The device includes a feeding switch device, a material storage box and a heating and heat preservation cavity. The bottom of the material storage box is provided with a blanking port, and a blanking pipe is arranged in the heating and heat preservation cavity just below the material storage box; Electromagnetic flow control valve; a wire conveying and clamping device is arranged below the welding device, which includes a wire conveying device and a wire positioning and clamping device; the system of the invention is compact in structure, easy to operate and use, and can quickly and high-quality sensors required for experimental testing. The welding of the wire is accurately completed, and the welding process is controllable. Enables automated operations designed to quickly connect sensor pins and sensor wires. Improve welding quality and attachment quality, improve work efficiency, and eliminate noise interference for data collection.

Description

A sensor-made wire automatic welding device

technical field

The utility model belongs to the field of sensor testing and application, in particular to an automatic welding device for making wires of a sensor.

Background technique

A sensor is a detection device similar to the senses, which senses the physical quantity of the measured object and converts it into current, voltage or other forms of information output for the tester to process, store and analyze. Some precision sensors will be equipped with special sensor wires and connection methods when they leave the factory, while most general-purpose sensors will have their own wire pins instead of sensor-specific wires when they leave the factory, which requires welding the sensor pins before data acquisition and testing. sensor wire. Sensors are widely used in signal detection in engineering mechanics, electroacoustics, sound wave detection, biomedicine, etc. There are many kinds of structural materials of the sensor, which are divided into flexible film, sheet, and block. Different forms of sensors are selected according to different application backgrounds and functional requirements. At present, most of the sensor welding processes used in the laboratory for scientific research use manual welding of wires and pins. The welding is rough, the smell is strong, and the operator's body is greatly affected. It takes a long time, and the welding is inaccurate and the welding quality is not high. In order to ensure the accuracy and sensitivity of the acquisition, the welding of the sensor pins and wires is particularly important for the normal use of the sensor in the later stage. Poor welding connection quality between pins and wires will cause greater noise interference, and poor welding quality will also cause sensor wires to fall off and fail.

In order to ensure the sensitivity of the sensor and the low noise of the signal during the test process, the welding of the sensor wire and the lead is a particularly important process, and the main factors affecting the welding quality are the curing quality of the welding adhesive and the positioning relationship between the lead and the lead. . The demand for sensors in scientific research and engineering applications continues to increase, and the diversity of test environments also puts forward higher and higher requirements for the welding of sensor wires. How to ensure efficient and accurate welding quality has become a technology worthy of study.

The invention patent publication number CN201820470430 discloses a manual soldering device, including a godet wheel, a pressing wheel, a wire storage part, a wire feeding assembly and other tensioning mechanisms. The soldering device is not suitable for accurate pins and wires. Welding, the lack of positioning tooling cannot guarantee the welding quality.

Utility model content

The purpose of the utility model is to solve the above problems, and aims to provide an automatic welding device for making wires of sensors. The system of the utility model has the advantages of compact structure, simple principle, convenient operation and use, and can quickly and accurately complete the welding of the wire with the sensor required for the experimental test, and the welding process is controllable. Enables automated operations designed to quickly connect sensor pins and sensor wires. Improve welding quality and attachment quality, improve work efficiency, and eliminate noise interference for data collection.

In order to achieve the above purpose, the technical solution adopted by the present invention is: an automatic welding device for making wires by sensors, comprising a welding device and a three-axis sliding table device for moving the welding device in the x, y, and z directions of the space coordinate system, the The three-axis sliding table device is arranged on the frame, and the frame is also provided with a sensor carrier below the welding device; the welding device includes a feed switch device, a material storage box and a heating and heat preservation cavity, and the material storage box A blanking port is arranged at the bottom, a blanking pipe is arranged in the heating and heat preservation cavity just below the storage box, and a top bead that controls the conduction and closing of the blanking port and the blanking pipe is arranged on the feed switch device; An electromagnetic flow control valve is arranged at the discharge end of the blanking tube, and a ring light source positioning device is also sleeved at the outlet of the electromagnetic flow control valve; a wire conveying and clamping device that moves synchronously with the welding device is arranged below the welding device The wire conveying and clamping device includes a wire conveying device and a wire positioning and clamping device; the wire conveying and clamping device makes the wire contact the to-be-welded pins of the to-be-welded sensor set on the sensor carrier.

Further, the feed switch device includes a servo motor, a sleeve, a screw, a first piston, a first spring, a pneumatic two-way valve, a second piston and a top ball; the servo motor is connected to the sleeve through a coupling, so The sleeve is provided with an internal threaded sleeve that cooperates with the screw, one end of the screw is freely arranged in the threaded sleeve, and the other end is in contact with one end face of the first piston; the first piston is arranged in the piston sleeve, and the piston sleeve One end is set in the sleeve, the piston sleeve is provided with a first piston chamber, a valve chamber and a second piston chamber, the first piston chamber is connected with the valve chamber, and the valve chamber is connected through a pneumatic two-way valve; The other end of the first piston is connected to one end of the first spring, and the other end of the first spring is arranged on the step between the first piston chamber and the valve chamber; the pneumatic two-way valve is connected to the second piston chamber in the second piston chamber. One end of the piston is in contact, the other end of the second piston is connected to the top ball, the top of the top ball is connected to the second spring, and the end of the second spring is fixed at the bottom of the second piston chamber; the upper part of the second piston chamber is provided with a blanking material The lower part of the blanking port is provided with a discharge port, the lower part of the discharge port is connected with a blanking pipe, and the top ball can block the blanking port during the moving process.

Further, the heating and heat preservation chamber includes an upper heating chamber and a lower heat preservation chamber surrounding the blanking pipe, a heating device is arranged in the upper heating chamber, and a heat preservation device is arranged in the lower heat preservation chamber; A temperature control switch is arranged between the upper heating cavity and the lower heat preservation cavity; and a temperature sensor is also arranged in the heat preservation cavity.

Further, the wire conveying and clamping device includes an annular positioning block, and a wire groove inclined toward the lower part of the central axis of the annular positioning block is provided through the outer circumferential surface of the annular positioning block, and a mounting seat is embedded in the inclined groove; A wire groove is arranged in the middle of the mounting seat, and a plurality of sets of wheel pairs are evenly distributed on the upper and lower sides along the direction of the wire groove. The driven wheel on one side, the wire is arranged between the driving wheel and the driven wheel through the wire groove and contacts with the wheel pair to form a wire conveying device; the wire positioning and clamping device includes symmetrically arranged on both sides of the wire outlet of the wire groove. A pair of photosensitive control modules and a pair of wire positioning and clamping devices are provided, the photosensitive control modules are electrically connected with the trigger clamping device.

Further, the servo motor, heating device and heat preservation device, temperature sensor, temperature control switch, ring light source positioning device, electromagnetic flow control valve, multiple sets of wheel sets and photosensitive control positioning modules and trigger clamping devices and three-axis sliding table The devices are all electrically connected to the console.

A welding process for making a wire automatic welding device for a sensor comprises the following steps:

S1: Place the sensor of the sensor wire to be welded into the sensor carrier;

S2: Turn on the console, make the servo motor of the feed switch device start to rotate forward, drive the screw to push the first piston, the compressed air of the first piston controls the gas two-way valve to push the second piston, and the second piston pushes the top bead to move, when the top bead moves When leaving the blanking port, the welding material starts to be transported into the blanking tube. After a certain amount is conveyed, the servo motor starts to reverse and the screw returns, so that the top ball blocks the blanking port and stops the material conveying;

S3: Start the heating device and the heat preservation device, the heating device heats the material in the blanking pipe, when the temperature reaches the set value, the temperature control switch is automatically turned on, and the material enters the lower heat preservation cavity for heat preservation;

S4: Start the three-axis slide device so that the discharge end at the bottom of the welding device passes through the annular positioning block;

S5: Turn on the switch of the light source positioning device, and through the light source positioning, the discharge end of the welding device is set directly above the sensor pins;

S6: Turn on the wire conveying device, the wheel sets make the wire pass through the wire slot and transport it to the right under the discharge end of the welding device, and the photosensitive control module delays start to trigger the clamping device to clamp the wire, so that the wire and the to-be-welded wire are clamped. Contact at the pin of the sensor;

S7: The switch of the electromagnetic flow control valve is turned on, and the welding material melt flows out from the discharge end and drips on the connection between the end of the wire and the sensor pin;

S8: Turn off the console, stop the operation of the entire device, take out the welded sensor from the sensor carrier, and complete the entire welding process.

Further, in the step S3, the heating temperature of the heating device is 400°C-600°C, and the heating time is 0-5 min.

Further, in the step S2, the rotation speed of the servo motor is 600r/min, and the delay time is 0.5s.

Further, the flow control speed of the electromagnetic flow control valve in the step S7 is 1 ml/s.

The beneficial effects of the present utility model:

1. The utility model adopts an automatic welding device to weld the sensor pins, and the welding effect is good and the efficiency is high.

2. The utility model adopts the automatic welding method, which improves the welding precision, reduces the human influence, improves the welding quality, and makes the attachment effect of the sensor on the sensor to be welded better.

3. The utility model adopts an automatic welding device for welding, and the welding device can automatically realize the blanking and can be precisely positioned to the position to be welded by the three-axis sliding table device.

4. The utility model controls the temperature of the soldering material through automatic heating and automatic heat preservation device, and adopts different heating temperatures according to different soldering materials.

5. The utility model positions and clamps the sensor wire, the sensor wire can be automatically transported, and can be automatically clamped and positioned when it is in contact with the pin to be welded.

6. The utility model controls the discharge of the welding material, ensures the discharge quantity and welding quality of the welding material, and avoids the waste of the welding material at the same time.

7. The device of the utility model is convenient and easy to disassemble and assemble, which is convenient for cleaning and daily maintenance.

8. The utility model can realize heat preservation treatment after heating the welding material, and avoid the performance change and energy consumption of the welding material caused by repeated heating.

Description of drawings

1 is a schematic diagram of a sensor wire welding device of the present invention

FIG. 2 is a schematic structural diagram of a welding device module of the present invention.

Fig. 3 is the structural schematic diagram of the feed switch device of the present invention

4 is a schematic structural diagram of the wire clamping device of the present invention

Figure 5 is a schematic structural diagram of the digital instrument console of the present invention

In the figure: 1. Welding device; 2. Wire conveying and clamping device; 3. Three-axis sliding table device; 4. Frame; 10. Feed switch device; 11. Heating and heat preservation chamber; Blanking tube; 14, shell; 101, servo motor; 102, coupling; 103, sleeve; 104, internal thread sleeve; 105, screw; 106, first piston; 107, first spring; 108, pneumatic Two-way valve; 109, second piston; 110, heating device; 111, temperature control switch; 112, heat preservation device; 113, temperature sensor; 114, electromagnetic flow control valve; 115, ring light source positioning device; 116, top bead; 117, Second spring; 118, valve chamber; 119, first piston chamber; 120, piston sleeve; 121, blanking port; 122, second piston chamber; 123, discharge port; 124, upper heating chamber; 125, lower heat preservation Cavity; 201, wire groove; 202, wheel set; 203, photosensitive control module; 204, trigger clamping device; 205, wire; 206, mounting seat; 207, wire positioning and clamping device; 208, annular positioning block; 41, Sensor carrier; 42, fixture table base; 43, console; 431, display screen; 432, control panel; 433, emergency stop button.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention. .

As shown in Figures 1-5, the specific structure of this embodiment is an automatic welding device for making wires by sensors, including a welding device 1 and a three-axis slide table device that moves the welding device 1 in the x, y, and z directions of the space coordinate system 3. The welding device 1 is arranged on the slide rail in the X direction, which can achieve precise positioning in space, which is convenient for more accurate positioning of the welding material to the welding point; the three-axis sliding table device 3 is arranged on the frame 4, so The frame 4 is also provided with a sensor carrier 41 below the welding device 1, and the sensor carrier 41 is arranged on the fixture table base 42; the welding device 1 includes a feed switch device 10, a material storage box 12 and a heating and heat preservation device. Cavity 11, in which a blanking port 121 is provided at the bottom of the storage box 12, a blanking pipe 13 is provided in the heating and heat preservation cavity 11 directly below the storage box 12, and a control blanking port 121 is provided on the feeding switch device 10. The top ball 116 is connected and closed with the blanking pipe 13; an electromagnetic flow control valve 114 is arranged at the discharge end of the blanking pipe 13, and the material flow is controlled by the electromagnetic flow control valve 114; the outlet of the electromagnetic flow control valve 114 is also sleeved with The ring light source positioning device 115, the ring light source positioning device 115 can emit the ring light source to the place to be welded, and can quickly locate the welding point through the ring light source, so as to avoid the welding deviation of the welding device 1; 1. The wire conveying and clamping device 2 that moves synchronously. The end of the wire 205 positioned by the wire conveying and clamping device 2 is arranged just below the discharge end at the bottom of the welding device 1. The wire conveying and clamping device 2 includes a wire conveying device and a The wire positioning and clamping device 207; the wire conveying and clamping device 2 makes the wire 205 contact the to-be-welded pins of the to-be-welded sensor set on the sensor carrier 41, and the welding device 1 is also set directly above the contact. , dripping solder material to achieve welding.

Preferably, as shown in FIG. 3 , the feed switch device 10 is arranged in the housing 14 , and the feed switch device 10 includes a servo motor 101 , a sleeve 103 , a screw 105 , a first piston 106 , a first spring 107 , a pneumatic bidirectional The valve 108, the second piston 109 and the top ball 116; the servo motor 101 is connected with the sleeve 103 through the coupling 102, and the sleeve 103 is provided with an internal thread sleeve 104 matched with the screw 105, and one end of the screw 105 is free It is arranged in the inner threaded sleeve 104, and the other end is in contact with one end surface of the first piston 106 to push the first piston 106 to move; the first piston 106 is arranged in the piston sleeve 120, and one end of the piston sleeve 120 is arranged in the sleeve 103 Inside, the piston sleeve 120 is provided with a first piston chamber 119 , a valve chamber 118 and a second piston chamber 122 , the first piston chamber 119 communicates with the valve chamber 118 , and the valve chamber 118 passes through the pneumatic two-way valve 108 Conduction; the other end of the first piston 106 is connected to one end of the first spring 107, the other end of the first spring 107 is arranged on the step between the first piston chamber 119 and the valve chamber 118, and the first spring 107 is The return spring plays the role of reset after the action is completed; the pneumatic two-way valve 108 is in contact with one end of the second piston 109 in the second piston chamber 122, and the other end of the second piston 109 is connected to the top ball 116; the top of the top ball 116 Connected with the second spring 117, the end of the second spring 117 is fixed at the bottom of the second piston chamber 122, wherein the second spring 117 is a reset spring, which plays a reset role after the action is completed; the upper part of the second piston chamber 122 A blanking port 121 is provided, and a discharging port 123 is arranged at the lower part of the discharging port 121, and the lower part of the discharging port 123 is connected with the blanking pipe 13, and the top ball 116 can block the blanking port 121 during the moving process; When the servo motor 101 starts, it drives the sleeve 103 to rotate, the rotation of the sleeve 103 causes the screw 105 to extend or retract from the inner threaded sleeve 104, and the movement of the screw 105 drives the reciprocating motion of the first piston 106, the first The change of the air pressure in the piston chamber 119 makes the pneumatic two-way valve 108 open or close, and the pneumatic two-way valve 108 drives the second piston 109 to reciprocate.

Preferably, as shown in FIG. 4 , the wire conveying and clamping device 2 includes an annular positioning block 208 , and a wire groove 201 inclined toward the lower part of the central axis of the annular positioning block 208 is provided through the outer circumference of the annular positioning block 208 , A mounting seat 206 is embedded in the chute; a wire slot 201 is arranged in the middle of the mounting seat 206 , and a plurality of sets of wheel pairs 202 are evenly distributed along the upper and lower sides of the wire slot 201 , and the wheel pairs 202 include setting wires The driving pulley on one side of the slot 201 and the driven pulley on the other side of the wire groove 201 are paired with it. The wire positioning and clamping device 207 includes a pair of photosensitive control modules 203 and a pair of trigger clamping devices 204 symmetrically arranged on both sides of the wire outlet of the wire groove 201. The photosensitive control modules 203 are electrically connected to the trigger clamping device 204. even. The speed of the driving wheel is set through the console 43 to control the conveying speed of the wire 205; the wire 205 is clamped by triggering the clamping device 204. The control module 203 triggers startup. The specific principle of triggering is that when the wire 205 passes through the photosensitive control module 203, the light source is blocked, and the speed of the driving wheel is set through the console 43, and the position of the sensor end is considered at the same time. , calculates the distance from the end to the specified position, combined with the speed of the driving wheel, the photosensitive control module 203 delays the activation of the trigger clamping device 204 , so that the trigger clamping device 204 clamps the wire 205 .

Preferably, as shown in FIG. 4 , the trigger clamping device 204 is a spring tightening device, which is composed of a spring and a tightening plate. When the wire 205 passes through the photosensitive control module 203, the light source is blocked, and the photosensitive control module 203 delays Activate the trigger clamping device 204, and the tightening device extends the spring to push the clamping plate to clamp the wire 205; the trigger switch controlled by the photosensitive control module 203 can be controlled by an electromagnet, that is, an electromagnet is set at the bottom end of the center of the spring, and the tightening plate is set as Metal material, the photosensitive control module 203 triggers the electromagnet to lose power, and the spring automatically pushes the clamping plate to compress the wire 205.

As shown in Figures 1 and 5, the servo motor 101, the heating device 110 and the heat preservation device 112, the temperature sensor 113, the temperature control switch 111, the ring light source positioning device 115, the electromagnetic flow control valve 114, the multiple sets of wheel pairs 202 and the photosensitive control module 203 and the trigger clamping device 204 and the three-axis slide device 3 are all electrically connected to the console 43 . Control the forward and reverse rotation and delayed start of the servo motor 101 through the console 43, control the startup of the heating device 110 and the heat preservation device 112, control the automatic opening and closing of the temperature control switch 111, control the opening of the ring light source positioning device 115, control many The synchronous rotation of the wheel pair 202 controls the activation of the photosensitive control module 203 and the clamping of the trigger clamping device 204, and controls the movement of the three-axis slide device 3; the console 43 is also provided with a display screen 431 and a control panel 432 and emergency stop button 433.

Preferably, the heat preservation device 112 is composed of a temperature-controlled electric heating wire and centrifugal glass wool. The temperature-controlled electric heating wire is arranged around the ring of the blanking tube 13, and the centrifugal glass wool is arranged on the outer ring for heat preservation and flame retardancy. The heat preservation device 112 makes The welding material is kept at the set temperature.

Preferably, the heating device 110 is a temperature-controlled electric heating wire. When the heating temperature is set, the temperature-controlled electric heating wire starts to heat. When the temperature reaches the required heating temperature, the heating is stopped, and the temperature control switch 111 is turned on to enter the heat preservation device 112.

Preferably, the ring light source positioning device 115 is a ring light tube, which can be positioned to the welding pin when it is lit, so as to realize the positioning function between the welding pin and the wire 205. The ring light source positioning device 115 emits the ring light source to the welding pin to be welded. At the welding point, the ring light source can be quickly positioned to the welding point, and the position of the wire 205 can be adjusted so that the welding pin and the wire 205 can be accurately positioned and contacted, so as to avoid welding deviation of the welding device 1 .

A welding process for making a wire automatic welding device for a sensor comprises the following steps:

S1: Place the sensor of the sensor wire to be welded into the sensor carrier 41;

S2: Turn on the console 43, make the servo motor 101 of the feed switch device 10 start to rotate forward, drive the screw 105 to push the first piston 106 to move, and the compressed air of the first piston 106 controls the pneumatic two-way valve 108 to push the second piston 109 to move. The second piston 109 pushes the top ball 116 to move. When the top ball 116 leaves the blanking port 121 , the welding material begins to be transported into the blanking pipe 13 . After a certain amount is transported, the servo motor 101 starts to reverse, and the screw 105 returns, so that the top ball 116 Block the blanking port 121 and stop the material conveying; the speed of the servo motor 101 is 600r/min, and the delay time is 0.5s.

S3: Start the heating device 110 and the heat preservation device 112, the heating device 110 heats the material in the blanking pipe 13, when the temperature reaches the set value, the temperature control switch 111 is automatically turned on, and the material enters the lower heat preservation chamber 125 for heat preservation; the heating device The heating temperature of 110 is 400℃-600℃, and the heating time is 0-5min;

S4: Start the three-axis slide device 3, so that the bottom discharge end of the welding device 1 passes through the annular positioning block 208;

S5: The ring light source positioning device 115 is turned on, and the light source is positioned so that the discharge end of the welding device 1 is set directly above the sensor pins;

S6: Turn on the wire conveying device, the wheel set 202 makes the wire 205 pass through the wire slot 201 and transport it to the right below the discharge end of the welding device 1, and the photosensitive control module 203 delays activation to trigger the clamping device 204 to clamp the wire 205 Tighten so that the wires 205 are in contact with the pins of the sensor to be soldered.

S7: The switch of the electromagnetic flow control valve 114 is turned on, the welding material melt flows out from the discharge end and drips on the connection between the end of the wire 205 and the sensor pin; the flow control speed of the electromagnetic flow control valve 114 is 1ml/s.

S8: Turn off the console 43, stop the operation of the entire device, take out the welded sensor from the sensor carrier 41, and complete the entire welding process.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus.

The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above examples are only used to help understand the method and the core idea of the present invention. The above are only the preferred embodiments of the present invention. It should be pointed out that due to the limited expression of words, there are objectively unlimited specific structures. For those of ordinary skill in the art, without departing from the principles of the present invention However, some improvements, modifications or changes can also be made, and the above-mentioned technical features can also be combined in an appropriate manner; these improvements, modifications, or combinations, or the concept and technical solutions of the invention are directly applied to other occasions without improvement. should be regarded as the protection scope of the present invention.

Claims (4)

1. An automatic welding device for sensor-made wires, characterized in that it comprises a welding device (1) and a three-axis slide device (3) for moving the welding device (1) in the x, y, and z directions of the space coordinate system, so The three-axis slide device (3) is arranged on a frame (4), and a sensor carrier (41) is further arranged on the frame (4) below the welding device (1); the welding device (1) It includes a feeding switch device (10), a material storage box (12) and a heating and heat preservation cavity (11). A blanking pipe (13) is arranged in the heating and heat preservation chamber (11) below, and the feeding switch device (10) is provided with a top bead that controls the conduction and closing of the blanking port (121) and the blanking pipe (13). (116); an electromagnetic flow control valve (114) is provided at the discharge end of the blanking pipe (13), and an annular light source positioning device (115) is also sleeved at the outlet of the electromagnetic flow control valve (114); A wire conveying and clamping device (2) that moves synchronously with the welding device (1) is arranged below the welding device (1), and the wire conveying and clamping device (2) includes a wire conveying device and a wire positioning clamping device (207) ; The wire conveying and clamping device (2) makes the wire (205) contact the to-be-welded pins of the to-be-welded sensor provided on the sensor carrier (41). 2 . The automatic welding device for sensor production wire according to claim 1 , wherein the feed switch device ( 10 ) comprises a servo motor ( 101 ), a sleeve ( 103 ), a screw ( 105 ), a first A piston (106), a first spring (107), a pneumatic two-way valve (108), a second piston (109) and a top ball (116); the servo motor (101) is connected to the sleeve (102) through the coupling (102). 103), the sleeve (103) is provided with an internal thread sleeve (104) that cooperates with the screw (105), one end of the screw (105) is freely set in the internal thread sleeve (104), and the other end is One end of a piston (106) is in contact with one end; the first piston (106) is arranged in the piston sleeve (120), and one end of the piston sleeve (120) is arranged in the sleeve (103), and the piston sleeve (120) A first piston chamber (119), a valve chamber (118) and a second piston chamber (122) are arranged inside, the first piston chamber (119) communicates with the valve chamber (118), and the valve chamber (118) Conduction through the pneumatic two-way valve (108); the other end of the first piston (106) is connected to one end of the first spring (107), and the other end of the first spring (107) is arranged between the first piston chamber (119) and the first spring (107). on the step provided between the valve chambers (118); the pneumatic two-way valve (108) is in contact with one end of the second piston (109) in the second piston chamber (122), and the other end of the second piston (109) is connected A top ball (116), the top of the top ball (116) is connected with a second spring (117), and the end of the second spring (117) is fixed at the bottom of the second piston chamber (122); the second piston chamber (122) ) is provided with a blanking port (121) at the upper part, and a discharge port (123) is set at the lower part of the blanking port (121), and the lower part of the discharge port (123) is connected with a blanking pipe (13), and the top bead ( 116) The blanking port (121) can be blocked during the movement. 3 . The automatic welding device for making wires of sensors according to claim 1 , wherein the heating and heat preservation cavity ( 11 ) comprises an upper heating cavity ( 124 ) and a lower heat preservation cavity ( 124 ) surrounding the blanking tube ( 13 ). 4 . 125), a heating device (110) is arranged in the upper heating chamber (124), a heating device (112) is arranged in the lower heating chamber (125); the blanking pipe (13) is arranged in the upper heating chamber (125). A temperature control switch (111) is arranged between 124) and the lower insulation chamber (125); a temperature sensor (113) is also arranged in the lower insulation chamber (125). 4 . The automatic welding device for sensor production wire according to claim 1 , wherein the wire conveying and clamping device ( 2 ) comprises an annular positioning block ( 208 ), the annular positioning block ( 208 ) is outside the annular positioning block ( 208 ). A wire groove (201) inclined toward the lower part of the central axis of the annular positioning block (208) is arranged through the circular surface, and a mounting seat (206) is embedded in the wire groove; a wire groove is provided through the middle of the mounting seat (206). (201), a plurality of sets of wheel pairs (202) are evenly distributed along the upper and lower sides of the wire groove (201), and the wheel pairs (202) include a driving wheel on one side of the wire groove (201) and a driving wheel formed therewith. For the driven wheel arranged on the other side of the wire groove (201), the wire (205) is arranged between the driving wheel and the driven wheel through the wire groove (201) and is in contact with the wheel pair (202) to form a wire conveying device; The wire positioning and clamping device (207) includes a pair of photosensitive control modules (203) and a pair of trigger clamping devices (204) symmetrically arranged on both sides of the wire outlet of the wire groove (201), the photosensitive control module (203) Electrically connected to the trigger clamp (204).

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