An electrode arm structure with embedded ultrasonic sensor

Abstract

An electrode arm structure with an embedded ultrasonic sensor belongs to the field of intelligent electric welding technology, and its purpose is to solve the problem that sampling samples is not only inefficient but also has serious workpiece waste. The present invention includes: an electrode arm shell, the electrode arm shell includes an electrode rod, an electrode cap connected to one end of the electrode rod, an electrode arm connected to the other end of the electrode rod, and a signal line lead-out and sealing structure arranged on the side wall of the electrode rod; an ultrasonic measurement component arranged inside the electrode rod, the ultrasonic measurement component includes a probe fixing frame and an ultrasonic probe, the ultrasonic probe is coaxially fixed on the probe fixing frame, the probe fixing frame and the inner annular surface of the electrode rod are matched, the signal line of the ultrasonic probe passes through the electrode rod and is led out and sealed through the signal line lead-out and sealing structure; and a cooling water pipeline arranged inside the electrode arm shell to circulate water cooling on the electrode cap.

Description

Technical Field

[0001] The invention belongs to the technical field of intelligent electric welding, and in particular relates to an electrode arm structure with an embedded ultrasonic sensor. Background Art

[0002] Welding technology is widely used in automobile production, and resistance welding has become the most widely used process for body-in-white welding due to its advantages such as high degree of automation, low cost and fast welding speed. In order to obtain good body welding strength, it is necessary to ensure that there are no defects such as pores and burn-through in the weld. At present, most car companies use destructive tests on random samples to detect weld quality. This is not only inefficient but also has serious workpiece waste. It can no longer meet the automatic detection needs of intelligent production lines. The resistance welding ultrasonic in-situ detection system can realize welding quality monitoring and problem tracing of welds without affecting the resistance welding production rhythm. The traditional resistance welding electrode arm is not compatible with the ultrasonic probe 0302 and cannot meet the requirements of probe installation, cooling and signal line lead-out. Summary of the invention

[0003] The purpose of the present invention is to propose an electrode arm structure with an embedded ultrasonic sensor to solve the problem in the prior art that the sampling efficiency of samples is not only low but also there is serious waste of workpieces; the electrode arm structure with an embedded ultrasonic sensor is used to realize ultrasonic in-situ detection of resistance welding, thereby realizing welding quality monitoring and problem tracing of welds, and effectively improving the online guarantee of welding quality and production efficiency on intelligent manufacturing production lines.

[0004] To achieve the above object, an electrode arm structure of an embedded ultrasonic sensor of the present invention comprises:

[0005] The electrode arm housing 01 includes an electrode rod, an electrode cap 0101 connected to one end of the electrode rod, an electrode arm 0108 connected to the other end of the electrode rod, and a signal line lead-out and sealing structure arranged on the side wall of the electrode rod;

[0006] An ultrasonic measuring component 03 is arranged inside the electrode rod, the ultrasonic measuring component 03 comprises a probe fixing frame 0301 and an ultrasonic probe 0302, the ultrasonic probe 0302 is coaxially fixed on the probe fixing frame 0301, the probe fixing frame 0301 and the inner annular surface of the electrode rod are matched, and the signal line of the ultrasonic probe 0302 passes through the electrode rod and is led out and sealed through the signal line leading out and sealing structure;

[0007] And a cooling water pipeline 02 is arranged inside the electrode arm housing 01, and circulating water cooling is performed on the electrode cap 0101 through the cooling water pipeline 02.

[0008] The cooling water pipeline 02 includes:

[0009] A semicircular tube 0201 is arranged in the electrode rod, the arc surface of the semicircular tube 0201 contacts the inner surface of the electrode rod, one end of the semicircular tube 0201 contacts one side of the probe fixing frame 0301 and is connected to the inside of the electrode cap 0101;

[0010] The water inlet pipe 0202 is connected to the end of the semicircular tube 0201, and the water inlet pipe 0202 is located in the electrode arm 0108. The external size of the water inlet pipe 0202 is smaller than the inner diameter of the accommodating hole inside the electrode arm 0108 for accommodating the water inlet pipe 0202.

[0011] The semicircular tube 0201 comprises:

[0012] A tube body, one end of which contacts one side of the probe fixing frame 0301 and is connected to the inside of the electrode cap 0101;

[0013] A sealing fixing block 020103 fixedly and sealingly connected to the other end of the tube body;

[0014] A connecting pipe 020101, wherein a first outlet of the connecting pipe 020101 passes through the side wall of the pipe body and is connected to the interior of the pipe body, and a second outlet of the connecting pipe 020101 is connected to one end of the water inlet pipe 0202;

[0015] And a cover cap 020102, wherein the cover cap 020102 and the third outlet of the connecting pipe 020101 are fixedly sealed and connected.

[0016] The water inlet pipe 0202 is a copper hose.

[0017] The electrode arm structure also includes a probe position adjustment body 04, which includes a first spacer 0401, a second spacer 0402 and a third spacer 0403. The first spacer 0401 is arranged between the probe fixing frame 0301 and the inner boss at the end of the electrode rod or between the end of the semicircular tube 0201 of the cooling water pipe 02 and the inner protrusion at the end of the electrode rod; the second spacer 0402 is arranged between the probe fixing frame 0301 and the inner boss at the end of the electrode rod or between the end of the semicircular tube 0201 of the cooling water pipe 02 and the inner protrusion at the end of the electrode rod; the third spacer 0403 is arranged between the probe fixing frame 0301 and the inner boss at the end of the electrode rod or between the end of the semicircular tube 0201 of the cooling water pipe 02 and the inner protrusion at the end of the electrode rod.

[0018] The electrode rod includes a front half tube 0102 and a rear half tube 0107 which are threadedly connected. The rear half tube 0107 is provided with a radial through hole. The other end of the front half tube 0102 is connected to the electrode cap 0101, and the other end of the rear half tube 0107 is threadedly connected to the electrode arm 0108. The signal line lead-out and sealing structure are located on the rear half tube 0107.

[0019] The signal line lead-out and sealing structure comprises:

[0020] A sealing member 0106, one end of which is fixedly connected to a through hole on the rear half tube 0107 of the electrode rod, and the sealing member 0106 is provided with a stepped through hole inside, and one end of the stepped through hole with a smaller inner diameter is connected to the rear half tube 0107;

[0021] A rubber spring pad 0105 disposed at the bottom of the hole with a larger inner diameter of the stepped through hole;

[0022] A phenolic resin pad 0104 is disposed in a hole with a larger inner diameter of the stepped through hole, wherein one end of the phenolic resin pad 0104 is in contact with the rubber elastic pad 0105 and the other end extends out from the end of the stepped hole;

[0023] And a hexagonal bolt buckle 0103, the other end of the hexagonal bolt buckle 0103 and the sealing member 0106 are threadedly connected to extrude the phenolic resin pad 0104 and the rubber spring pad 0105, and the signal line of the ultrasonic probe 0302 passes through the stepped hole of the sealing member 0106, the rubber spring pad 0105, the phenolic resin pad 0104 and the hexagonal bolt buckle 0103 in sequence.

[0024] The beneficial effects of the present invention are as follows: the electrode arm structure of the present invention with an embedded ultrasonic sensor can be compatible with the installation of an ultrasonic probe 0302 to achieve non-destructive testing of resistance welding. By designing a special semicircular tube 0201, while being compatible with the ultrasonic probe 0302, the original cooling water channel is not affected, and the normal circulation of cooling water is ensured; the rear end of the semicircular tube 0201 is connected to the water inlet pipe 0202, and the cooling water reaches the electrode cap 0101 through the semicircular tube 0201, so that the electrode cap 0101 is cooled and becomes a coupling agent for the ultrasonic probe 0302, ensuring that the ultrasonic signal is smoothly transmitted through the electrode cap 0101; the cooling water completes the reflux through the internal gap of the electrode rod via the electrode arm 0108. The semicircular tube 0201, the first spacer 0401, the second spacer 0402, the third spacer 0403, and the probe fixing frame 0301 are integrated inside the electrode arm, and the ultrasonic probe 0302 passes through the middle of the probe fixing frame 0301 and is fixed in position by the probe fixing frame 0301. At the same time, the positions of the components inside the electrode arm are adjusted by setting the first spacer 0401, the second spacer 0402, and the third spacer 0403 at different positions, so as to adjust the distance between the ultrasonic probe 0302 and the electrode cap 0101 to ensure the accuracy of the detection result. A sealing member 0106 is designed to ensure the sealing of the electrode arm, so that the signal line of the ultrasonic probe 0302 can pass through the electrode arm smoothly and output the detection signal, which can assist in realizing the welding quality monitoring and problem tracing of the welding point by the resistance welding ultrasonic in-situ detection system, and can effectively improve the online guarantee of welding quality and production efficiency on the intelligent manufacturing production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of an electrode arm of an embedded ultrasonic sensor of the present invention;

[0026] Figure 2 A schematic diagram of water return of an electrode arm structure of an embedded ultrasonic sensor according to the present invention;

[0027] Figure 3 It is a schematic diagram of an electrode arm housing 01 of an electrode arm structure of an embedded ultrasonic sensor of the present invention;

[0028] Figure 4 A schematic diagram of a cooling water pipeline 02 of an electrode arm structure of an embedded ultrasonic sensor of the present invention;

[0029] Figure 5 It is a schematic diagram of an ultrasonic measurement component 03 of an electrode arm structure of an embedded ultrasonic sensor of the present invention;

[0030] Among them: 01, electrode arm shell; 0101, electrode cap; 0102, front half of the tube; 0103, hexagonal bolt buckle; 0104, phenolic resin pad; 0105, rubber spring pad; 0106, seal; 0107, rear half of the tube; 0108, electrode arm; 02, cooling water pipeline; 0201, semicircular tube; 020101, connecting pipe; 020102, cap; 020103, sealing fixing block; 0202, water inlet pipe; 03, ultrasonic measurement component; 0301, probe fixing frame; 0302, ultrasonic probe; 04, probe position adjustment body, 0401, first spacer; 0402, second spacer; 0403, third spacer. DETAILED DESCRIPTION

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

[0032] Since the electrode cap 0101 generates a lot of heat during the operation of the electrode arm, the cooling water circulation needs to be maintained in the electrode arm, and the introduction of the ultrasonic probe should not affect the cooling of the electrode cap 0101. In addition, the signal of the ultrasonic probe 0302 needs to be transmitted through the signal line, and the signal line passing through the electrode arm should not cause cooling water leakage. In addition, the ultrasonic detection results are often affected by the distance between the probe and the electrode cap 0101, thereby interfering with the efficiency and quality of the detection. It is possible to adjust the position of the ultrasonic probe 0302 in the electrode arm in a targeted manner under different circumstances to ensure the detection efficiency and quality of the weld. Therefore, the electrode arm structure of the present invention that can embed an ultrasonic sensor is of great significance for assisting the realization of a resistance welding ultrasonic in-situ detection system, thereby realizing welding quality monitoring and problem tracing of welds, and effectively improving the online guarantee and production efficiency of welding quality on intelligent manufacturing production lines.

[0033] See attached Figure 1 and attached Figure 5 , an electrode arm structure of an embedded ultrasonic sensor of the present invention comprises:

[0034] The electrode arm housing 01 includes an electrode rod, an electrode cap 0101 connected to one end of the electrode rod, an electrode arm 0108 connected to the other end of the electrode rod, and a signal line lead-out and sealing structure arranged on the side wall of the electrode rod;

[0035] An ultrasonic measuring component 03 is arranged inside the electrode rod, the ultrasonic measuring component 03 comprises a probe fixing frame 0301 and an ultrasonic probe 0302, the ultrasonic probe 0302 is coaxially fixed on the probe fixing frame 0301, the probe fixing frame 0301 and the inner annular surface of the electrode rod are matched, and the signal line of the ultrasonic probe 0302 passes through the electrode rod and is led out and sealed through the signal line leading out and sealing structure;

[0036] And a cooling water pipeline 02 is arranged inside the electrode arm housing 01, and circulating water cooling is performed on the electrode cap 0101 through the cooling water pipeline 02.

[0037] See attached Figure 4 , the cooling water pipeline 02 comprises:

[0038] A semicircular tube 0201 is arranged in the electrode rod, the arc surface of the semicircular tube 0201 contacts the inner surface of the electrode rod, one end of the semicircular tube 0201 contacts one side of the probe fixing frame 0301 and is connected to the inside of the electrode cap 0101;

[0039] The water inlet pipe 0202 is connected to the end of the semicircular tube 0201, and the water inlet pipe 0202 is located in the electrode arm 0108. The external size of the water inlet pipe 0202 is smaller than the inner diameter of the accommodating hole inside the electrode arm 0108 for accommodating the water inlet pipe 0202.

[0040] The semicircular tube 0201 comprises:

[0041] A tube body, one end of which contacts one side of the probe fixing frame 0301 and is connected to the inside of the electrode cap 0101;

[0042] A sealing fixing block 020103 fixedly and sealingly connected to the other end of the tube body, which is connected by welding in this embodiment;

[0043] A connecting pipe 020101, wherein a first outlet of the connecting pipe 020101 passes through the side wall of the pipe body and is connected to the interior of the pipe body, and a second outlet of the connecting pipe 020101 is connected to one end of the water inlet pipe 0202;

[0044] And a cover cap 020102, the cover cap 020102 and the third outlet of the connecting pipe 020101 are fixedly sealed and connected. In this embodiment, a welding connection is adopted to prevent the semicircular pipe 0201 from leaking.

[0045] The first outlet and the third outlet are coaxially arranged opposite to each other.

[0046] In this embodiment, the third outlet at the upper end of the semicircular tube 0201 and the two openings at the right bottom are provided due to the semicircular tube processing technology.

[0047] The water inlet pipe 0202 is a copper hose, extending from the rear end of the semicircular pipe 0201 to the tail end of the electrode arm 0108.

[0048] See attached Figure 2The cooling water pipeline 02 passes through a specially designed semicircular tube 0201, which can be compatible with the ultrasonic probe 0302 without affecting the original cooling water channel, thereby ensuring the normal circulation of the cooling water. The rear end of the semicircular tube 0201 is connected to the water inlet pipe 0202, and the cooling water enters through the water inlet pipe 0202, and reaches the electrode cap 0101 through the semicircular tube 0201, so that the electrode cap 0101 cools down. At the same time, the cooling water acts as a coupling agent for the ultrasonic probe 0302, ensuring that the ultrasonic signal is transmitted out. Finally, the cooling water flows into the empty cavity inside the electrode rod through the gap between the probe fixing frame 0301 and the semicircular tube 0201, and completes the reflux through the electrode arm 0108.

[0049] The electrode arm structure also includes a probe position adjustment body 04, which includes a first spacer 0401, a second spacer 0402 and a third spacer 0403. The first spacer 0401 is arranged between the probe fixing frame 0301 and the inner boss at the end of the electrode rod or between the end of the semicircular tube 0201 of the cooling water pipe 02 and the inner protrusion at the end of the electrode rod; the second spacer 0402 is arranged between the probe fixing frame 0301 and the inner boss at the end of the electrode rod or between the end of the semicircular tube 0201 of the cooling water pipe 02 and the inner protrusion at the end of the electrode rod; the third spacer 0403 is arranged between the probe fixing frame 0301 and the inner boss at the end of the electrode rod or between the end of the semicircular tube 0201 of the cooling water pipe 02 and the inner protrusion at the end of the electrode rod.

[0050] See attached Figure 3 The electrode rod includes a front half tube 0102 and a rear half tube 0107 which are threadedly connected. The rear half tube 0107 is provided with a radial through hole. The other end of the front half tube 0102 is connected to the electrode cap 0101, and the other end of the rear half tube 0107 is threadedly connected to the electrode arm 0108. The signal line lead-out and sealing structure are located on the rear half tube 0107.

[0051] The signal line lead-out and sealing structure comprises:

[0052] A sealing member 0106, one end of which is fixedly connected to a through hole on the rear half tube 0107 of the electrode rod. In this embodiment, a welding connection is adopted. The sealing member 0106 is provided with a stepped through hole inside. One end of the stepped through hole with a smaller inner diameter is connected to the rear half tube 0107;

[0053] A rubber spring pad 0105 disposed at the bottom of the hole with a larger inner diameter of the stepped through hole;

[0054] A phenolic resin pad 0104 is disposed in a hole with a larger inner diameter of the stepped through hole, wherein one end of the phenolic resin pad 0104 is in contact with the rubber elastic pad 0105 and the other end extends out from the end of the stepped hole;

[0055] And a hexagonal bolt buckle 0103, the other end of the hexagonal bolt buckle 0103 and the seal 0106 are threadedly connected to extrude the phenolic resin pad 0104 and the rubber spring pad 0105, and the signal line of the ultrasonic probe 0302 passes through the stepped hole of the seal 0106, the rubber spring pad 0105, the phenolic resin pad 0104 and the hexagonal bolt buckle 0103 in sequence. The hexagonal screw buckle extrude the phenolic resin pad 0104, so that the rubber spring pad 0105 undergoes elastic deformation and is in close contact with the seal 0106, plugging the gap and preventing the electrode rod from leaking. The ultrasonic probe 0302 is fixed in position by the probe fixing frame 0301, and the rubber spring pad 0105 is used to fix the position of the signal line and lead it out from the electrode arm.

[0056] The ultrasonic probe 0302 of the ultrasonic measurement assembly 03 of the present invention passes through the middle of the probe fixing frame 0301 and is fixed by the probe fixing frame 0301. The signal line of the ultrasonic probe 0302 passes through the electrode rod through the rubber spring pad 0105 to output the detection signal. The cooling water between the electrode cap 0101 and the ultrasonic probe 0302 also acts as a coupling agent for the ultrasonic probe 0302, ensuring that the ultrasonic signal is smoothly transmitted through the electrode cap 0101. The sum of the axial lengths of the probe fixing frame 0301, the semicircular tube 0201, the first spacer 0401, the second spacer 0402, and the third spacer 0403 is equal to the internal length of the electrode rod, so that each component is integrated inside the electrode rod, thereby fixing the position of each component. By setting the different positions of the first spacer 0401, the second spacer 0402, and the third spacer 0403, the positions of the components inside the electrode rod are adjusted, thereby adjusting the distance between the ultrasonic probe 0302 and the electrode cap 0101, and ensuring the accuracy of the detection results.

Claims

1. An electrode arm structure with an embedded ultrasonic sensor, characterized in that: include: An electrode arm housing (01), the electrode arm housing (01) comprising an electrode rod, an electrode cap (0101) connected to one end of the electrode rod, an electrode arm (0108) connected to the other end of the electrode rod, and a signal line lead-out and sealing structure arranged on a side wall of the electrode rod; An ultrasonic measurement component (03) is arranged inside the electrode rod, the ultrasonic measurement component (03) comprising a probe fixing frame (0301) and an ultrasonic probe (0302), the ultrasonic probe (0302) is coaxially fixed on the probe fixing frame (0301), the probe fixing frame (0301) and the inner annular surface of the electrode rod are matched, and a signal line of the ultrasonic probe (0302) passes through the electrode rod and is led out and sealed through a signal line lead-out and sealing structure; and a cooling water pipeline (02) disposed inside the electrode arm housing (01), through which the electrode cap (0101) is subjected to circulating water cooling; The cooling water pipeline (02) comprises: A semicircular tube (0201) is arranged inside the electrode rod, the arc surface of the semicircular tube (0201) contacts the inner surface of the electrode rod, one end of the semicircular tube (0201) contacts one side of the probe fixing frame (0301) and is connected to the inside of the electrode cap (0101); a water inlet pipe (0202) connected to the end of the semicircular tube (0201), the water inlet pipe (0202) being located inside the electrode arm (0108), and the outer dimension of the water inlet pipe (0202) being smaller than the inner diameter of the accommodating hole inside the electrode arm (0108) for accommodating the water inlet pipe (0202); The semicircular tube (0201) comprises: A tube body, one end of which is in contact with one side of the probe fixing frame (0301) and is in communication with the interior of the electrode cap (0101); A sealing fixing block (020103) fixedly and sealingly connected to the other end of the tube body; A connecting pipe (020101), wherein a first outlet of the connecting pipe (020101) passes through the side wall of the pipe body and is connected to the interior of the pipe body, and a second outlet of the connecting pipe (020101) is connected to one end of the water inlet pipe (0202); And a cover cap (020102), wherein the cover cap (020102) and the third outlet of the connecting pipe (020101) are fixedly sealed and connected.

2. The electrode arm structure of an embedded ultrasonic sensor according to claim 1, characterized in that: The water inlet pipe (0202) is a copper hose.

3. An electrode arm structure with an embedded ultrasonic sensor according to claim 1 or 2, characterized in that: The electrode arm structure also includes a probe position adjustment body (04), which includes a first spacer (0401), a second spacer (0402) and a third spacer (0403). The first spacer (0401) is arranged between the probe fixing frame (0301) and the inner boss at the end of the electrode rod, or between the end of the semicircular tube (0201) of the cooling water pipe (02) and the inner boss at the end of the electrode rod; the second spacer (0402) is arranged between the probe fixing frame (0301) and the inner boss at the end of the electrode rod, or between the end of the semicircular tube (0201) of the cooling water pipe (02) and the inner boss at the end of the electrode rod; and the third spacer (0403) is arranged between the probe fixing frame (0301) and the inner boss at the end of the electrode rod, or between the end of the semicircular tube (0201) of the cooling water pipe (02) and the inner boss at the end of the electrode rod.

4. The electrode arm structure of an embedded ultrasonic sensor according to claim 3, characterized in that: The electrode rod comprises a front half tube (0102) and a rear half tube (0107) which are threadedly connected, the rear half tube (0107) is provided with a radial through hole, the other end of the front half tube (0102) is connected to the electrode cap (0101), the other end of the rear half tube (0107) is threadedly connected to the electrode arm (0108), and the signal line lead-out and sealing structure are located on the rear half tube (0107).

5. The electrode arm structure of an embedded ultrasonic sensor according to claim 4, characterized in that: The signal line lead-out and sealing structure comprises: A sealing member (0106), one end of the sealing member (0106) being fixedly connected to a through hole on the rear half tube (0107) of the electrode rod, the sealing member (0106) being provided with a stepped through hole inside, one end of the stepped through hole having a smaller inner diameter being connected to the rear half tube (0107); A rubber spring pad (0105) disposed at the bottom of the hole with a larger inner diameter of the stepped through hole; A phenolic resin pad (0104) is disposed in a hole having a larger inner diameter than the stepped through hole, wherein one end of the phenolic resin pad (0104) is in contact with the rubber elastic pad (0105) and the other end extends out from the end of the stepped hole; and a hexagonal bolt buckle (0103), wherein the other end of the hexagonal bolt buckle (0103) and the sealing member (0106) are threadedly connected to an extruded phenolic resin pad (0104) and a rubber spring pad (0105), and a signal line of the ultrasonic probe (0302) passes through the stepped hole of the sealing member (0106), the rubber spring pad (0105), the phenolic resin pad (0104) and the hexagonal bolt buckle (0103) in sequence.

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