Friction welding temperature measuring welding head fixing structure and friction stir welding equipment

Abstract

The utility model discloses a friction welding temperature measuring welding head fixing structure and friction stir welding equipment, which comprises a female seat with two electric connecting wires, two electric connecting structures arranged on the bottom surface of the female seat, and two electric connecting structures respectively connected with the two electric connecting wires; the welding head is provided with a thermocouple metal wire and a conductive structure; the thermocouple metal wire and the conductive structure are electrically connected with the two electric connection structures respectively; wherein the thermocouple metal wires are electrically connected with the corresponding electric connection structures, and the conductive structures are electrically connected with the corresponding electric connection structures, so that the electric connection can be separated after the welding head is far away from the female seat for a certain distance. According to the utility model, the thermocouple metal wire, the conductive structure and the electric connection structure are all detachably connected, and when the welding head is detached, the thermocouple metal wire, the conductive structure and the electric connection structure can be separated at the same time, so that a wire harness does not need to be detached and arranged, the welding head is not interfered and influenced by the wire harness during detachment, and the welding head is more convenient to detach.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of friction welding, in particular to a friction welding temperature measurement welding head fixing structure and a friction stir welding equipment. BACKGROUND

[0002] Friction stir welding mainly generates a large amount of friction heat through the friction between the stirring head and the workpiece to be welded, so that the weld material softens to reach a thermoplastic state, and the material in the weld zone flows and mixes plastically to finally realize solid-phase connection of the material. Friction stir welding is a high-efficiency, high-weld-performance, and environmentally friendly welding technology that is widely used in the welding of aluminum, copper, and titanium alloys. The welding temperature change caused by friction is an important indicator of the friction stir welding process, which directly affects the welding quality. Real-time monitoring of the temperature of the welding core area helps to control the welding process, improve the welding stability, and reduce welding defects.

[0003] In order to measure the temperature of the welding core area, the temperature can be measured by the thermocouple wire built in the welding head. Since the welding head is a tool that needs to be frequently replaced, in the existing temperature measurement scheme, the connection between the thermoelectric potential signals of the welding head and the thermocouple and the signal processing module usually adopts a physical line connection, which is relatively complex to install, resulting in that when the welding head is replaced, the replacement operation is cumbersome due to the interference and influence of the wire harness. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving one of the technical problems existing in the prior art. To this end, the utility model provides a friction welding temperature measurement welding head fixing structure, which can facilitate the disassembly and replacement of the welding head.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A friction welding temperature measurement welding head fixing structure comprises a female seat having two electric connection lines, two electric connection structures are arranged on the bottom surface of the female seat, and the two electric connection structures are connected with the two electric connection lines, respectively; a welding head is installed with a thermocouple wire and a conductive structure, the material of the thermocouple wire is different from that of the welding head, the thermocouple wire extends to the temperature measurement area of the welding head, and the conductive structure extends to the non-temperature measurement area of the welding head; the thermocouple wire and the conductive structure are electrically connected with the two electric connection structures, respectively; wherein the thermocouple wire and the corresponding electric connection structure are electrically connected, and the conductive structure and the corresponding electric connection structure are electrically connected, which can be separated after the welding head moves away from the female seat to a certain distance.

[0007] Further, the female seat and the welding head are circumferentially positioned by a circumferential positioning structure.

[0008] Further, the circumferential positioning structure comprises a positioning protrusion arranged on the upper end of the welding head and a positioning gap arranged on the lower end of the female seat and matched with the positioning protrusion.

[0009] Further, the electric connection structure is a metal sleeve arranged on the bottom of the female seat, and the thermocouple metal wire and the upper end of the conductive structure are both protruded from the upper end of the welding head and inserted into the corresponding metal sleeve.

[0010] Further, the height of the protrusion of the thermocouple metal wire and the conductive structure from the upper end of the welding head is less than the height of the protrusion of the positioning protrusion from the upper end of the welding head.

[0011] Further, the outer circumferential wall of the welding head is provided with a vertical plane.

[0012] Further, the welding head comprises a welding head body and a cover plate, the upper end surface of the welding head body is provided with a first insertion hole and a second insertion hole, the thermocouple metal wire and the conductive structure are respectively inserted into the first insertion hole and the second insertion hole, and the cover plate is detachably arranged on the upper end of the welding head to axially limit the thermocouple metal wire and the conductive structure.

[0013] Further, the outer circumferential wall of the thermocouple metal wire is wrapped with an insulating tube inserted into the first insertion hole, and the upper end of the thermocouple metal wire extends out of the insulating tube, and the lower end of the thermocouple metal wire is flush with the friction surface of the welding head body or / and in contact with the welding head body.

[0014] Further, the first insertion hole is a through hole, the lower end of the thermocouple metal wire is flush with the friction surface of the welding head body, and the lower end of the thermocouple metal wire is separated from the welding head body by the insulating tube.

[0015] Further, the first insertion hole is a through hole, the outer circumferential contour of the insulating tube is matched with the first insertion hole and inserted into the first insertion hole, the lower end of the thermocouple metal wire is provided with a radial protruding head, the outer circumferential wall of the radial protruding head is in contact with the inner wall of the first insertion hole, and the lower end of the insulating tube is in abutment with the upper end surface of the radial protruding head.

[0016] Further, the cover plate is provided with a first insulating sleeve, the first insulating sleeve is provided with a through hole in the center, the upper end of the thermocouple metal wire passes through the through hole and extends out of the cover plate, the first insulating sleeve is in the shape of a stepped shaft with a narrow upper end and a wide lower end, the cover plate is provided with a first stepped hole matched with the first insulating sleeve for installation, and the upper end of the insulating tube is in abutment with the bottom surface of the first insulating sleeve.

[0017] The utility model also provides a kind of friction stir welding equipment, comprising: welding sleeve;Friction welding temperature measuring welding head fixing structure, is installed in welding sleeve.

[0018] Further, the two electric connection structures are elastically deformed to be in elastic contact with the thermocouple wire and the conductive structure respectively, or the female seat is elastically movably mounted on the welding sleeve to apply elastic forces to the two electric connection structures towards the thermocouple wire and the conductive structure.

[0019] The utility model has the advantages of the following beneficial effects:

[0020] The thermocouple wire is in contact with the temperature measuring area of the welding head, and the conductive structure is in contact with the non-temperature measuring area of the welding head, and the material of the thermocouple wire is different from that of the welding head, so that when welding is performed, the temperature measuring area at the front end of the welding head rubs against the workpiece to form a welding heat source, and the temperature of the non-temperature measuring area of the welding head is different from that of the front end temperature measuring area, thereby generating a thermoelectric effect, generating a voltage in the loop formed by the thermocouple wire and the welding head, and the temperature value of the friction surface at the front end of the welding head can be obtained by analyzing the voltage, thereby achieving temperature measurement of the core area of the weld (the temperature measuring area).

[0021] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The utility model will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings that form a part of this application are intended to provide a further understanding of the utility model, and the schematic embodiments of the utility model and the description thereof are intended to explain the utility model and do not constitute an improper limitation on the utility model. In the drawings:

[0023] Figure 1 is a connection structure schematic view of the utility model embodiment;

[0024] Figure 2 is an exploded state structure schematic view of the female seat and the welding head;

[0025] Figure 3 is an exploded state structure schematic view of the welding head;

[0026] Figure 4 is a structure schematic view of the female seat;

[0027] Figure 5 is a structure schematic view of the welding head;

[0028] Figure 6 is a sectional view of the female seat and the welding head mounted on the welding sleeve;

[0029] Figure 7 is Figure 6 an enlarged view of A of

[0030] Figure 8 is a partial sectional view of one embodiment of a thermocouple wire installation;

[0031] Figure 9 is a partial sectional view of another embodiment of a thermocouple wire installation;

[0032] Figure 10 is a partial sectional view of another embodiment of a thermocouple wire installation;

[0033] Figure 11 is a partial sectional view of one embodiment of a friction stir welding apparatus;

[0034] Figure 12 is a partial sectional view of another embodiment of a friction stir welding apparatus

[0035] is a partial sectional view of one embodiment of a thermocouple wire installation;

[0036] Figure legend:

[0037] female seat 100, electrical connecting wire 110, positioning accommodation 120, metal sleeve 130;

[0038] welding head 200, vertical plane 201, friction surface 202, thermocouple wire 210, insulating tube 211, conductive structure 220, circumferential protrusion 221, positioning protrusion 230, welding head body 240, first insertion hole 241, second insertion hole 242, threaded hole 243, cover plate 250, insulating sleeve 251, through hole 252, first stepped hole 253, second stepped hole 254, connecting hole 255, second insulating sleeve 260;

[0039] welding sleeve 300, set screw 310. DETAILED DESCRIPTION

[0040] It should be understood that the specific embodiments described herein are merely exemplary and do not limit the present application.

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0042] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications will also change accordingly.

[0043] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0044] Please refer to Figure 1 and Figure 2 , the present application provides a preferred embodiment of a friction welding temperature measuring welding head fixing structure, which comprises a female seat 100 and a welding head 200.

[0045] The female seat 100 has two electric connection lines 110, and the bottom surface of the female seat 100 is provided with two electric connection structures, which are respectively connected with the two electric connection lines 110. One end of the connection line 110 is connected with the corresponding electric connection structure, and the other end extends out of the female seat 100, so as to be connected with the circuit board, thereby transmitting the electric potential signal to the signal processing module on the circuit board.

[0046] The welding head 200 is provided with a thermocouple wire 210 and a conductive structure 220, the material of the thermocouple wire 210 is different from that of the welding head 200; the thermocouple wire 210 extends to a temperature measuring area of the welding head 200, and the conductive structure 220 extends to a non-temperature measuring area of the welding head 200. Specifically, the temperature measuring area is an area where the bottom friction surface 202 of the welding head 200 contacts the workpiece 101, and the non-temperature measuring area is an area away from the temperature measuring area, which is usually arranged in the upper half of the welding head 200. In order to be far away from the temperature measuring area, the non-temperature measuring area is preferably arranged at the upper end of the welding head 200, and the conductive structure 220 is arranged at the upper end of the welding head 200, and the lower end of the thermocouple wire 210 extends to be flush with the friction surface 202, so as to directly measure the temperature measuring area. The thermocouple wire 210 and the conductive structure 220 are electrically connected to two electrical connection structures respectively; wherein the electrical connection between the thermocouple wire 210 and the corresponding electrical connection structure, and the electrical connection between the conductive structure 220 and the corresponding electrical connection structure can be separated when the welding head 200 is away from the base 100 to a certain distance, so that the separation of the thermocouple wire 210, the conductive structure 220 and the corresponding electrical connection structure can be realized when the welding head 200 is disassembled.

[0047] The welding head fixing structure for friction welding and temperature measurement provided by the utility model utilizes the contact between the thermocouple wire 210 and the welding head of the temperature measuring area, and the contact between the conductive structure 220 and the non-temperature measuring area, and because the material of the thermocouple wire is different from that of the welding head, when the temperature of the non-temperature measuring area contacted by the conductive structure 220 is different from the temperature of the temperature measuring area sensed by the thermocouple wire 210, a thermoelectric effect will be generated, and a voltage will be generated in the loop formed by the thermocouple wire 210 and the welding head 200, and the temperature value of the temperature measuring area of the welding head can be obtained by analyzing the voltage, so that the temperature measurement of the core area (temperature measuring area) of the welding seam can be realized; and the thermocouple wire 210, the conductive structure 220 and the electrical connection structure are detachably connected, so that the separation of the thermocouple wire 210, the conductive structure 220 and the electrical connection structure can be realized when the welding head 200 is disassembled, and the wiring harness (electrical connection line 110) does not need to be disassembled and arranged, and the disassembly of the welding head 200 is not affected by the wiring harness, so that the disassembly of the welding head 200 is more convenient.

[0048] As shown in Figure 1 In some embodiments of the utility model, the base 100 and the welding head 200 are circumferentially positioned by the circumferential positioning structure, so that the thermocouple wire 210, the conductive structure 220 and the electrical connection structure will not be misaligned during installation, and the thermocouple wire 210, the conductive structure 220 and the electrical connection structure can be accurately connected.

[0049] As shown in Figure 2As shown, in some embodiments of the utility model, the circumferential positioning structure includes the positioning protrusion 230 arranged on the upper end of the welding head 200 and the positioning gap 120 arranged on the lower end of the female seat 100 and matched with the positioning protrusion 230. Figure 7 As shown, since during installation, the welding head 200 and the female seat 100 are inserted into the round hole of the welding sleeve 300, the coaxial centering of the welding head 200 and the female seat 100 is realized, and through the cooperation of the positioning protrusion 230 and the positioning gap 120, when the female seat 100 is docked, the situation of rotational misplacement does not occur, thereby realizing circumferential positioning; through the embedding of the positioning protrusion 230 into the positioning gap 120, the positioning and docking of the upper end of the welding head 200 and the lower end of the female seat 100 are realized. Specifically, the positioning protrusion 230 is arranged on the edge of the female seat 100, the positioning gap 120 is arranged on the edge of the welding head 200, and the positioning protrusion 230 and the positioning gap 120 both have vertical planes that are mutually attached, thereby realizing circumferential positioning. Of course, in other embodiments, the cross-sectional profile of the positioning protrusion 230 and the positioning gap 120 can also be other shapes, such as polygons.

[0050] Of course, in some other embodiments, a positioning gap can also be arranged on the upper end of the welding head 200, and a positioning protrusion can also be arranged on the female seat 100, which can also achieve the same effect.

[0051] Referring to Figure 2 and Figure 4 In some embodiments of the utility model, the electrical connection structure is a metal sleeve 130 installed on the bottom of the female seat 100, and the upper end of the thermocouple metal wire 210 and the conductive structure 220 protrudes from the upper end of the welding head 200 and is inserted into the corresponding metal sleeve 130. The metal sleeve 130 is embedded in the bottom surface of the female seat 100, the upper end of the thermocouple metal wire 210 and the conductive structure 220 protrudes from the upper end of the welding head 200 and is inserted into the metal sleeve 130, thereby realizing the connection with the electrical connection line 110, so that the electric potential signal can be transmitted, and the insertion and separation of the thermocouple metal wire 210, the conductive structure 220 and the metal sleeve 130 can be realized with the attachment and separation of the welding head 200 and the female seat 100, so that the insertion and separation of the thermocouple metal wire 210, the conductive structure 220 and the metal sleeve 130 do not need to be realized by additional actions, and in addition, the positioning and matching of the positioning protrusion 230 and the positioning gap 120 enable the thermocouple metal wire 210 and the conductive structure 220 to be accurately positioned with the metal sleeve 130 during installation, which is simple and convenient to operate and install.

[0052] In a further embodiment of this utility model, the heights of the thermocouple wire 210 and the conductive structure 220 protruding from the upper end of the welding head 200 are both less than the heights of the positioning protrusion 230 protruding from the upper end of the welding head 200. This allows the positioning protrusion 230 to first engage with the positioning relief 120 to achieve circumferential positioning when the welding head 200 is installed. At this time, the thermocouple wire 210 and the conductive structure 220 are aligned with the metal sleeve 130. Subsequently, the thermocouple wire 210 and the conductive structure 220 are inserted into the metal sleeve 130. This avoids the thermocouple wire 210 and the conductive structure 220 from moving upwards without being aligned with the metal sleeve 130, which could lead to collision and damage with the bottom surface of the female base 100. Therefore, during assembly, the positioning protrusion 230 always engages with the positioning relief 120 first, and then the thermocouple wire 210 and the conductive structure 220 are inserted into the metal sleeve 130.

[0053] Reference Figure 2 and Figure 6 In some embodiments of this utility model, the outer peripheral wall of the welding head 200 is provided with a vertical plane 201. After the welding head 200 is inserted into the round hole of the welding sleeve 300, the welding head 200 can be fixed by the set screw 310 on the peripheral wall of the welding sleeve 300 abutting against the vertical plane 201. The contact between the plane and the set screw 310 is more stable, and it has a certain circumferential fixing effect.

[0054] Reference Figure 3 In some embodiments of this utility model, the welding head 200 includes a welding head body 240 and a cover plate 250. The material of the thermocouple wire is different from that of the welding head body 240. Specifically, the thermocouple wire can be made of nickel-chromium alloy, and the welding head body 240 and the cover plate 250 can be made of H13 mold steel. The positioning protrusion 230 is specifically provided on the cover plate 250, and the vertical plane 201 is provided on the welding head body 240. The upper end face of the welding head body 240 is provided with a first insertion hole 241 and a second insertion hole 242. The thermocouple wire 210 and the conductive structure 220 are respectively inserted into the first insertion hole 241 and the second insertion hole 242, such as... Figure 5 As shown, the first insertion hole 241 extends from the upper end face of the welding head body 240 to the friction surface 202 at the bottom of the welding head 200. The second insertion hole 242 is a blind hole located in the upper end region of the welding head body 240. The cover plate 250 is detachably installed on the upper end of the welding head body 240 to axially limit the thermocouple wire 210 and the conductive structure 220. The cover plate 250 presses down on the thermocouple wire 210 and the conductive structure 220 to axially limit their axial movement and ensure stable installation. Specifically, the cover plate 250 has a connecting hole 255, and the upper end face of the welding head body 240 has a threaded hole 243. The connecting hole 255 is aligned with the threaded hole 243 and a screw is inserted to achieve the connection and fixation between the cover plate 250 and the welding head body 240.

[0055] In further embodiments of the utility model, the thermocouple wire 210 is wrapped with an insulating tube 211 inserted into the first insertion hole 241, and the upper end of the thermocouple wire 210 extends out of the insulating tube 211, and the lower end of the thermocouple wire 210 is flush with the friction surface 202 of the welding head body 240 or / and in contact with the welding head body 240. Thus, only the lower end of the thermocouple wire 210 is in contact with the temperature measuring area of the welding head body 240, avoiding the thermocouple wire 210 contacting the welding head body 240 except the temperature measuring area.

[0056] In specific embodiments of the utility model, as shown in Figure 8 The lower end of the thermocouple wire 210 is flush with the friction surface 202 of the welding head body 240, and the lower end of the thermocouple wire 210 is separated from the welding head body 240 by the insulating tube 211. When the lower end of the thermocouple wire 210 is not in direct contact with the welding head body 240, the friction surface 202 will be in contact with the surface of the workpiece 101 during processing, and the lower end of the thermocouple wire 210 will also be in contact with the workpiece 101, thereby realizing the electrical connection between the lower end of the thermocouple wire 210 and the lower end of the welding head body 240 through the workpiece 101, and realizing the temperature measurement of the temperature measuring area at the lower end of the welding head body 240. Of course, the lower end of the thermocouple wire 210 can also be in direct contact with the welding head body 240. It can be understood that the first insertion hole 241 is a circular hole matched with the insulating tube 211, thereby achieving the positioning effect of the insulating tube 211 and the thermocouple wire 210.

[0057] Referring to Figure 9 In other specific embodiments of the utility model, the first insertion hole 241 is a through hole, the outer contour of the insulating tube 211 is matched with the first insertion hole 241 and inserted into the first insertion hole 241, the lower end of the thermocouple wire 210 is provided with a radial protruding head 212, the outer periphery of the radial protruding head 212 is in contact with the inner wall of the first insertion hole 241, specifically, the radial protruding head 212 is in interference fit with the first insertion hole 241, the lower end of the insulating tube 211 is in abutment with the upper end surface of the radial protruding head 212, thereby achieving the axial positioning effect of the insulating tube 211, and the lower end surface of the radial protruding head 212 is flush with the friction surface 202 of the welding head body 240, thereby facilitating installation. Specifically, the first insertion hole 241 can be a circular hole for easy processing.

[0058] Referring to Figure 10In another specific embodiment of the utility model, the thermocouple wire 210 is wrapped with an insulating tube 211, and the upper and lower ends of the thermocouple wire 210 extend out of the insulating tube 211, the first jack 241 is a first stepped hole with the upper part wide and the lower part narrow, so as to adapt to the lower end of the thermocouple wire 210 extending out of the insulating tube 211 to contact and conduct with the welding head body 240, and the lower end of the thermocouple wire 210 is flush with the friction surface 202 of the welding head body 240.

[0059] With reference to Figure 3 And Figure 7 In a further embodiment of the utility model, a first insulating sleeve 251 is installed on the cover plate 250, the first insulating sleeve 251 is provided with a through hole 252 in the center, and the upper end of the thermocouple wire 210 extends out of the cover plate 250 by passing through the through hole 252, so as to be connected with the electrical connection structure (metal sleeve 130) at the upper end. The first insulating sleeve 251 is in the shape of a stepped shaft with the upper part narrow and the lower part wide, the cover plate 250 is provided with a first stepped hole 253 for fitting and installing the first insulating sleeve 251, so that the cover plate 250 axially limits the first insulating sleeve 251 and makes it unable to move upward, realizing the pressing effect on the first insulating sleeve 251, and the upper end of the insulating tube 211 is attached to the bottom surface of the first insulating sleeve 251, so as to realize the axial limiting and the pressing effect on the first insulating sleeve 251. The insulating tube 211 can be made of ceramic material and is fixedly connected with the thermocouple wire 210.

[0060] With reference to Figure 3 The conductive structure 220 is a metal column, the peripheral wall of the metal column is provided with a circumferential protrusion 221, a second insulating sleeve 260 is sleeved on the metal column, the upper end of the metal column protrudes out of the second insulating sleeve 260 and the cover plate 250, the second insulating sleeve 260 is located above the circumferential protrusion 221, the central hole diameter of the second insulating sleeve 260 is smaller than the circumferential protrusion 221, the second insulating sleeve 260 is in the shape of a stepped shaft with the upper part narrow and the lower part wide, and the cover plate 250 is provided with a second stepped hole 254 for fitting the second insulating sleeve 260, so that the cover plate 250 realizes the axial fixation of the metal column. The first insulating sleeve 251 and the second insulating sleeve 260 can be made of insulating materials such as rubber, plastic or ceramic.

[0061] The utility model also provides a kind of friction welding equipment for stirring, including the above-mentioned friction welding temperature measuring welding head fixed structure, welding main shaft, welding sleeve, welding main shaft drives welding sleeve 300 and welding head rotation, to realize friction welding. The friction welding temperature measuring welding head fixed structure is installed in welding sleeve 300, specifically, welding head 200 and female seat 100 are inserted into the round hole of welding sleeve 300.

[0062] With reference to Figure 11In some embodiments of the utility model, two electric connection structures can be elastically deformed to be in elastic contact with the thermocouple wire 210 and the conductive structure 220 respectively, specifically, the electric connection structure is a metal spring 270 which can be elastically deformed, and the metal spring 270 can be elastically deformed to be in close contact with the thermocouple wire 210 and the conductive structure 220, and when it is necessary to separate, the resistance is smaller.

[0063] Of course, in order to realize the elastic contact of the electric connection structure with the thermocouple wire 210 and the conductive structure 220, other ways can also be adopted, such as Figure 12 As shown in the drawings, in other embodiments of the utility model, the female seat 100 is elastically movably mounted on the welding sleeve 300 to apply elastic force to the two electric connection structures towards the thermocouple wire 210 and the conductive structure 220, specifically, the female seat 100 is provided with an elastic member 280 on the side away from the welding head 200, the elastic member 280 can be a compression spring, the elastic member 280 applies elastic force to the conductive structure 220 to make it in elastic contact with the thermocouple wire 210 and the conductive structure 220, and the conductive structure 220 can be a metal sheet 290, the metal sheet 290 is provided with a contact groove for embedding the thermocouple wire 210 and the conductive structure 220 to achieve the effect of stable positioning and contact.

[0064] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A friction welding temperature measuring welding head fixing structure, characterized in that, The utility model relates to a welding head and a base, and belongs to the field of welding equipment. The base (100) has two electric connection lines (110), and the bottom surface of the base (100) is provided with two electric connection structures, which are connected with the two electric connection lines (110) respectively. The welding head (200) is provided with a thermocouple wire (210) and a conductive structure (220), the material of the thermocouple wire (210) is different from that of the welding head (200), the thermocouple wire (210) extends to the temperature measuring area of the welding head (200), the conductive structure (220) extends to the non-temperature measuring area of the welding head (200), the thermocouple wire (210) and the conductive structure (220) are electrically connected with the two electric connection structures respectively, and the thermocouple wire (210) and the corresponding electric connection structure and the conductive structure (220) and the corresponding electric connection structure can be separated when the welding head (200) is separated from the base (100) to a certain distance.

2. The friction welding temperature measuring tool holder fixing structure according to claim 1, characterized by The base (100) and the welding head (200) are circumferentially positioned through a circumferential positioning structure, the circumferential positioning structure comprises a positioning protrusion (230) arranged on the upper end of the welding head (200) and a positioning gap (120) arranged on the lower end of the base (100) and matched with the positioning protrusion (230).

3. The friction welding temperature measuring tool holder fixation structure according to claim 2, characterized by The electric connection structure is a metal sleeve (130) arranged on the bottom of the base (100), and the upper ends of the thermocouple wire (210) and the conductive structure (220) protrude from the upper end of the welding head (200) and are inserted into the corresponding metal sleeve (130).

4. The friction welding temperature measuring tool holder fixation structure according to any one of claims 1 to 3, characterized by The welding head (200) comprises a welding head body (240) and a cover plate (250), the upper end surface of the welding head body (240) is provided with a first insertion hole (241) and a second insertion hole (242), the thermocouple wire (210) and the conductive structure (220) are inserted into the first insertion hole (241) and the second insertion hole (242) respectively, and the cover plate (250) is detachably arranged on the upper end of the welding head body (240) to axially position the thermocouple wire (210) and the conductive structure (220).

5. The friction welding temperature measuring tool holder fixation structure according to claim 4, characterized by The outer periphery of the thermocouple wire (210) is wrapped with an insulating tube (211) inserted into the first insertion hole (241), the upper end of the thermocouple wire (210) extends out of the insulating tube (211), and the lower end of the thermocouple wire (210) is flush with the friction surface (202) of the welding head body (240) or / and in contact with the welding head body (240).

6. The friction welding temperature measuring tool holder fixation structure according to claim 5, characterized by The first insertion hole (241) is a through hole, the lower end of the thermocouple wire (210) is flush with the friction surface (202) of the welding head body (240), and the lower end of the thermocouple wire (210) is separated from the welding head body (240) by the insulating tube (211).

7. The temperature measuring friction welding head fixing structure according to claim 5, wherein The first insertion hole (241) is a through hole, the lower end of the thermocouple wire (210) is provided with a radial protruding head (212), the outer periphery of the radial protruding head (212) is in contact with the inner wall of the first insertion hole (241), and the lower end of the insulating tube (211) is in abutment with the upper end surface of the radial protruding head (212).

8. The temperature measuring friction welding head fixing structure according to claim 5, wherein The cover plate (250) is provided with a first insulating sleeve (251) having a through hole (252) in the center, and the upper end of the thermocouple wire (210) extends out of the cover plate (250) through the through hole (252); the first insulating sleeve (251) is in the shape of a stepped shaft with a narrow upper end and a wide lower end, the cover plate (250) is provided with a first stepped hole (253) for fitting the first insulating sleeve (251), and the upper end of the insulating tube (211) is attached to the bottom surface of the first insulating sleeve (251).

9. A friction stir welding apparatus characterized by comprising: Comprise: a welding sleeve (300); The friction welding temperature measuring head fixing structure according to any one of claims 1 to 8 is mounted on the welding sleeve (300).

10. The friction stir welding apparatus of claim 9, wherein, The two electric connection structures are elastically deformed to be in elastic contact with the thermocouple wire (210) and the conductive structure (220) respectively, or the female seat (100) is elastically movably mounted on the welding sleeve (300) to apply elastic forces to the two electric connection structures towards the thermocouple wire (210) and the conductive structure (220).

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