A welding method with detection function

Abstract

The invention discloses a welding method with a detection function, and the welding method comprises: moving a positioning frame to a loading and unloading station, fixing a workpiece to be welded to a positioning base plate through a positioning mechanism; moving the positioning frame to an operation station, welding a part of the workpiece to be welded through a welding assembly; the welding time of the part of the workpiece to be welded accounts for half of the welding time of the total part to be welded; rotating the positioning frame 180°, detecting the welded part in step S2 through a detection assembly, and welding the remaining parts to be welded by the welding assembly; rotating the positioning frame 180° again, detecting the welded part in step S3 through a detection assembly; moving the positioning frame to a loading and unloading position, and disassembling the welded workpiece to be welded. By rotating the workpiece to be welded to the detection assembly after welding, and welding the remaining part through the welding assembly, welding and detection are performed synchronously, the production cycle is shortened, and production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, and in particular to a welding method with a detection function. Background Art

[0002] In the manufacturing industry, large-sized sheet metal parts are often used. However, due to the limitation of sheet metal manufacturing level, the manufacturing cost of large-sized sheet metal parts is high, and the input and output are not proportional. In order to solve this problem, technicians usually split large-sized sheet metal parts into multiple small-sized sheet metal parts and then weld them together. After welding, the welding quality of the welded parts is tested.

[0003] Most of the existing welding devices and testing devices are designed independently, which not only takes up plant space and increases production costs, but also requires the product to be moved from the welding station to the testing station after welding, which affects the production rhythm and reduces production efficiency.

[0004] Based on the above technical problems, the present application proposes a welding method with detection function. Summary of the invention

[0005] The object of the present invention is to provide a welding device with a detection function to solve the technical problems mentioned in the background technology. The object of the present invention is achieved through the following technical solutions:

[0006] A welding device with a detection function comprises a track, a positioning frame, a welding assembly and a detection assembly; loading and unloading stations and working stations are respectively arranged at both ends of the track, a mobile platform is arranged on the track, the positioning frame is installed on the mobile platform through a rotary indexing table, the rotary indexing table is a 180° rotary indexing table, a positioning base plate is installed on the positioning frame, a plurality of positioning mechanisms are installed on the positioning base plate, and the positioning mechanism fixes the workpiece to be welded on the positioning base plate; the welding assembly and the detection assembly are both installed at the working station, and the welding assembly and the detection assembly are respectively installed on both sides of the track; the welding method comprises:

[0007] Step S1, moving the positioning frame to the loading and unloading station, and fixing the workpiece to be welded to the positioning base plate through the positioning mechanism;

[0008] Step S2, moving the positioning frame to the working station, and welding part of the to-be-welded parts of the workpiece by means of the welding assembly; the welding time of the part of the to-be-welded parts accounts for half of the welding time of the total to-be-welded parts;

[0009] Step S3, rotating the positioning frame 180 degrees, inspecting the welded parts in step S2 through the inspection component, and welding the remaining parts to be welded by the welding component;

[0010] Step S4, rotating the positioning frame 180° again, and inspecting the welded part in step S3 through the inspection component;

[0011] Step S5, moving the positioning frame to the loading and unloading position, and removing the welded workpiece to be welded.

[0012] Furthermore, there are two positioning base plates, two welding assemblies and two detection assemblies, the two positioning base plates are symmetrically mounted on the positioning frame, and the two welding assemblies and the two detection assemblies are symmetrically arranged on both sides of the track.

[0013] Furthermore, the positioning frame is a frame with an isosceles trapezoidal structure, and the two positioning base plates are symmetrically installed on the sides of the positioning frame.

[0014] Furthermore, the welding assembly includes a welding manipulator and a welding gun, and the welding gun is connected to the welding manipulator.

[0015] Furthermore, the welding gun is a spot welding gun, a laser welding gun or a gas shielded welding gun.

[0016] Furthermore, the detection component includes a detection manipulator and a detection probe, and the detection probe is connected to the detection manipulator.

[0017] Furthermore, the detection probe includes a probe holder and an ultrasonic sensor. One end of the probe holder is connected to the detection manipulator, and the other end of the probe holder is provided with a connecting cavity. The ultrasonic sensor is slidably installed in the connecting cavity. A spring is installed between the ultrasonic sensor and the top of the connecting cavity. The detection end of the ultrasonic sensor extends out of the connecting cavity, and a solid coupling agent is installed at the detection end of the ultrasonic sensor.

[0018] Furthermore, the welding manipulator and the inspection manipulator are both six-axis robots.

[0019] Furthermore, the positioning mechanism includes a lower positioning frame, an upper positioning frame and a telescopic driving member, the lower positioning frame is fixed on the positioning base plate, the upper positioning frame is hinged to the upper end surface of the lower positioning frame through a hinge, one end of the telescopic driving member is connected to the positioning base plate, and the other end of the telescopic driving member is connected to the upper positioning frame, which is used to drive the upper positioning frame to flip around the hinge.

[0020] The technical solution provided in the embodiments of the present application has at least the following technical effects or advantages:

[0021] 1. By setting welding components and testing components on one station, it is possible to weld and test products on one station, saving equipment space, improving plant utilization, and saving costs;

[0022] 2. After the workpiece to be welded is welded, it is rotated to the detection component for detection, and the welding component welds the remaining part at the same time, so that welding and detection can be carried out simultaneously, shortening the production cycle and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of the positioning frame structure of an embodiment of the present application;

[0026] Figure 3 This is a schematic diagram of the positioning base plate and the positioning mechanism structure of the embodiment of the present application;

[0027] Figure 4 This is a schematic diagram of the positioning mechanism structure of an embodiment of the present application;

[0028] Figure 5 This is a schematic diagram of the structure of a welding gun assembly according to an embodiment of the present application;

[0029] Figure 6 This is a schematic diagram of the structure of the detection component of the embodiment of the present application;

[0030] Figure 7 This is a schematic diagram of the detection probe structure of an embodiment of the present application;

[0031] Figure 8 This is a schematic diagram of the connection between the probe bracket and the ultrasonic sensor of the embodiment of the present application;

[0032] Fig. 9 This is a schematic diagram of the clamping state of the workpiece to be welded according to an embodiment of the present application;

[0033] Fig.10 for Fig. 9 A partial enlarged view of .

[0034] Markings in the attached drawing: 1. Track; 11. Mobile platform; 2. Positioning frame; 21. Steel plate; 22. Rotary indexing table; 3. Welding assembly; 31. Welding manipulator; 32. Welding gun; 33. Welding heightening platform; 4. Detection assembly; 41. Detection manipulator; 42. Detection probe; 43. Detection heightening seat; 421. Probe bracket; 4211. Connecting cavity; 4212. Channel; 422. Ultrasonic sensor; 4221. Solid coupling agent; 423. Connecting flange; 424. Spring; 5. Positioning base plate; 51. Connecting piece; 6. Positioning mechanism; 61. Lower positioning frame; 62. Upper positioning frame; 63. Telescopic drive member; 64. Positioning block; 7. Workpiece to be welded. DETAILED DESCRIPTION

[0035] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the drawings and specific implementation methods of the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0036] like Figure 1 A welding device with a detection function is shown, comprising a track 1, the right end of the track 1 being arranged as a loading and unloading station, and the left end of the track 1 being arranged as an operation station. The track 1 is fixed on the floor of the workshop, and a mobile platform 11 is movably mounted on the track 1, and a running wheel is mounted at the bottom of the mobile platform 11, so that the mobile platform 11 can reciprocate along the track 1. Anti-collision blocks (not shown) are respectively mounted at both ends of the track 1 to prevent the mobile platform from sliding out of the track 1.

[0037] like Figure 1-Figure 3 As shown, a positioning frame 2 is installed on the mobile platform 11. The positioning frame 2 is a frame formed by welding square tubes, and the upper half of the frame is an isosceles trapezoidal structure. Figure 2 As shown, a steel plate 21 is welded and fixed to the bottom of the positioning frame 2, and a 180° rotating indexing table 22 is fixed to the center of the lower end surface of the steel plate 21. The 180° rotating indexing table 22 drives the positioning frame 2 to rotate 180°. Two positioning bottom plates 5 are symmetrically installed on both sides of the positioning frame 2. The positioning bottom plates 5 are installed on the plane where the waist of the isosceles trapezoid of the positioning frame 2 is located through multiple connecting pieces 51, so that the positioning bottom plates 5 are in an inclined state, which is convenient for welding and detection of the workpiece to be welded.

[0038] like Figure 3 , Figure 4 , Fig. 9 , Fig.10As shown, the upper end surface of the positioning base plate 5 is equipped with a plurality of positioning mechanisms 6, and the plurality of positioning mechanisms 6 fix the workpiece 7 to be welded on the positioning base plate 5. The positioning mechanism 6 includes a lower positioning frame 61, an upper positioning frame 62 and a telescopic driving member 63. The lower positioning frame 61 is fixed to the positioning base plate 5 by bolts. The height of the lower positioning frame 61 is twice the thickness of the workpiece to be welded, so as to facilitate the welding assembly 3 and the detection assembly 4 to extend into the workpiece to be welded. The left end of the upper positioning frame 62 is hinged to the left end of the upper end surface of the lower positioning frame 61 by a hinge, so that the upper positioning frame 62 can be flipped around the hinge, and a positioning space is formed between the lower end surface of the upper positioning frame 62 and the upper end surface of the lower positioning frame 61. The upper end of the telescopic driving member 63 is hinged to the end of the upper positioning frame 62 away from the positioning space, and the lower end of the telescopic driving member 63 is hinged to the lower positioning frame 61. When the telescopic driving member 63 is extended, it pushes the upper positioning frame 62 to flip clockwise, pressing the workpiece to be welded in the positioning space; when the telescopic driving member 63 is contracted, it pulls the upper positioning frame 62 to flip counterclockwise, making it convenient to remove the workpiece to be welded from the lower positioning frame 61.

[0039] The telescopic drive member 63 may be a cylinder, a hydraulic cylinder or an electric push rod. A rubber positioning block 64 is installed at the contact surface between the lower positioning frame 61, the upper positioning frame 62 and the workpiece 7 to be welded. On the one hand, it can avoid causing pressure damage to the surface of the workpiece to be welded, and on the other hand, it can also reduce the contact area between the positioning mechanism 6 and the workpiece to be welded, which is convenient for welding and testing. Fig. 9 As shown, when in use, the upper positioning frame 62 is turned over to form a positioning space with the lower positioning frame 61, and the workpiece 7 to be welded is clamped and fixed from all sides. Fig.10 As shown, when positioning the bar-shaped component in the workpiece 7 to be welded, the workpiece to be welded can be clamped from both sides of the long side of the bar-shaped workpiece 7 to be welded by four positioning blocks 64 .

[0040] like Figure 1 , Figure 5 As shown, two welding assemblies 3 are symmetrically installed on both sides of the track 1. The welding assembly 3 includes a welding manipulator 31 and a welding gun 32. The welding manipulator 31 is fixed on a welding heightening platform 33. The welding manipulator 31 is a six-axis robot, and the welding gun 32 is fixed on the sixth axis of the six-axis robot. Among them, the welding gun 32 can be a spot welding gun, a laser welding gun or a gas shielded welding gun. The six-axis robot controls the welding gun 32 to weld the workpiece to be welded. The structure and working principle of the six-axis robot and the welding gun are both existing technologies and will not be repeated here.

[0041] like Figure 1 , Figure 6-Figure 8As shown, two detection assemblies 4 are symmetrically installed on both sides of the track 1. The detection assembly 4 includes a detection manipulator 41 and a detection probe 42. The detection manipulator 41 is installed on a detection heightened seat 43. The detection manipulator 41 is also a six-axis robot, and the detection probe 42 is fixed on the sixth axis of the six-axis robot. The six-axis robot controls the detection probe 42 to detect the workpiece to be welded.

[0042] like Figure 7 , Figure 8 As shown, the detection probe 42 includes a probe bracket 421, an ultrasonic sensor 422 and a connecting flange 423. The probe bracket 421 is a cylindrical structure. The upper end of the probe bracket 421 is connected to the detection manipulator 41 through the connecting flange 423. The lower end of the probe bracket 421 is provided with a connecting cavity 4211. The top of the connecting cavity 4211 is provided with a channel 4212 that is connected to the top of the probe bracket 421. The ultrasonic sensor 422 is slidably installed in the connecting cavity 4211. The connecting wire of the ultrasonic sensor 422 extends out of the probe bracket 421 through the channel 4212, and the detection end of the ultrasonic sensor 422 extends out of the connecting cavity 4211. A spring 424 is installed between the ultrasonic sensor 422 and the top of the connecting cavity 4211, so as to press the ultrasonic sensor 422 outward, which not only ensures the tightness of the ultrasonic sensor 422 in contact with the workpiece to be welded, but also realizes the buffering of the ultrasonic sensor 422, reduces the impact of the ultrasonic sensor 422, and prolongs the service life of the ultrasonic sensor 422.

[0043] Preferably, a solid coupling agent 4221 is attached to the detection end of the ultrasonic sensor 422. The solid coupling agent 4221 is a silicone rubber layer. The silicone rubber layer protrudes from the top of the ultrasonic sensor 422 and is used to evacuate the air between the ultrasonic sensor 422 and the workpiece to be welded, while avoiding the residue of liquid coupling agent that causes rust on the workpiece. Example

[0044] The technical solution of Example 2 is the same as that of Example 1, except that:

[0045] The positioning frame 2 of Example 2 is a rectangular frame, and the positioning base plate 5 is horizontally placed on the top of the positioning frame 2. A welding assembly 3 and a detection assembly 4 are respectively installed on both sides of the track 1, which are used to weld and detect a single large-sized product, or weld and detect multiple small-sized products. Example

[0046] like Figure 1-Figure 8 As shown, a welding method using the welding device with detection function comprises the following steps:

[0047] Step S1, move the positioning frame 2 to the loading and unloading station, the telescopic drive member 63 is in a retracted state, the upper positioning frame 62 is in an open state, and after the workpiece to be welded is placed on the lower positioning frame 61, the telescopic drive member 63 is controlled to extend and press the workpiece to be welded to achieve the positioning of the workpiece to be welded.

[0048] Step S2, move the positioning frame 2 to the working station, and weld the part of the part to be welded on the left side of the workpiece through the welding assembly 3. The welding time of the part of the part to be welded accounts for half of the welding time of the total part to be welded, so as to maximize the overlap time of welding and detection and save processing time.

[0049] Step S3, rotating the positioning frame 180°, at this time, the welded part is rotated to the opposite left side, the detection component 4 detects the welded half, and the welding component 3 welds the remaining part;

[0050] Step S4, when the welding and inspection operations are completed in step S3, the positioning frame is rotated 180° again. At this time, the welded and inspected part is rotated to the left, and the welded but uninspected part is rotated to the right. The inspection component 4 inspects the welded but uninspected part.

[0051] The welding assembly 3 and the detection assembly 4 are symmetrically arranged on both sides of the track 1. The positioning frame 2 is driven to rotate by the 180° rotary indexing table, which can reduce the working radius of the six-axis robot and improve the welding accuracy and welding efficiency. Testing after partial welding can also dissipate heat in time to avoid deformation of the workpiece caused by welding.

[0052] Step S5, move the positioning frame 2 to the loading and unloading position, control the telescopic driving member 63 to retract, make the upper positioning frame 62 flip counterclockwise, and remove the welded workpiece to be welded.

[0053] The technical solution provided in the embodiments of the present application has at least the following technical effects or advantages:

[0054] 1. By setting welding components and testing components on one station, it is possible to weld and test products on one station, saving equipment space, improving plant utilization, and saving costs;

[0055] 2. After the workpiece to be welded is welded, it is rotated to the detection component for detection, and the welding component welds the remaining part at the same time, so that welding and detection can be carried out simultaneously, shortening the production cycle and improving production efficiency.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0057] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A welding method with detection function, characterized in that: The welding device involved includes a track, a positioning frame, a welding assembly and a detection assembly; loading and unloading stations and working stations are respectively arranged at both ends of the track, a mobile platform is arranged on the track, the positioning frame is installed on the mobile platform through a rotary indexing table, the rotary indexing table is a 180° rotary indexing table, a positioning base plate is installed on the positioning frame, a plurality of positioning mechanisms are installed on the positioning base plate, and the positioning mechanism fixes the workpiece to be welded on the positioning base plate; the welding assembly and the detection assembly are both installed at the working station, and there are two of the positioning base plates, the welding assembly and the detection assembly, and the two positioning base plates are symmetrically installed on the positioning frame, and the two welding assemblies and the two detection assemblies are symmetrically arranged on both sides of the track; The welding method is: Step S1, moving the positioning frame to the loading and unloading station, and fixing the workpiece to be welded to the positioning base plate through the positioning mechanism; Step S2, moving the positioning frame to the working station, and welding part of the to-be-welded parts of the workpiece by means of the welding assembly; the welding time of the part of the to-be-welded parts accounts for half of the welding time of the total to-be-welded parts; Step S3, rotating the positioning frame 180 degrees, inspecting the welded parts in step S2 through the inspection component, and welding the remaining parts to be welded by the welding component; Step S4, rotating the positioning frame 180° again, and inspecting the welded part in step S3 through the inspection component; Step S5, moving the positioning frame to the loading and unloading position, and removing the welded workpiece to be welded.

2. A welding method with detection function according to claim 1, characterized in that: The positioning frame is a frame with an isosceles trapezoidal structure, and the two positioning base plates are symmetrically installed on the sides of the positioning frame.

3. A welding method with detection function according to claim 1, characterized in that: The welding assembly comprises a welding manipulator and a welding gun, and the welding gun is connected to the welding manipulator.

4. A welding method with detection function according to claim 3, characterized in that: The welding gun is a spot welding gun, a laser welding gun or a gas shielded welding gun.

5. A welding method with detection function according to claim 3, characterized in that: The detection component comprises a detection manipulator and a detection probe, and the detection probe is connected to the detection manipulator.

6. A welding method with detection function according to claim 5, characterized in that: The detection probe includes a probe holder and an ultrasonic sensor. One end of the probe holder is connected to the detection manipulator. The other end of the probe holder is provided with a connecting cavity. The ultrasonic sensor is slidably installed in the connecting cavity. A spring is installed between the ultrasonic sensor and the top of the connecting cavity. The detection end of the ultrasonic sensor extends out of the connecting cavity. A solid coupling agent is installed at the detection end of the ultrasonic sensor.

7. A welding method with detection function according to claim 5, characterized in that: The welding manipulator and the detection manipulator are both six-axis robots.

8. A welding method with detection function according to claim 1, characterized in that: The positioning mechanism includes a lower positioning frame, an upper positioning frame and a telescopic driving member, the lower positioning frame is fixed to the positioning base plate, the upper positioning frame is hinged to the upper end surface of the lower positioning frame through a hinge, one end of the telescopic driving member is connected to the positioning base plate, and the other end of the telescopic driving member is connected to the upper positioning frame, and is used to drive the upper positioning frame to flip around the hinge.

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