Automatic precious metal welding machine and welding method

Abstract

The invention relates to the technical field of precious metal welding, in particular to an automatic precious metal welding machine and welding method.The automatic precious metal welding machine comprises a rack, an X-axis transfer module, a Z-axis welding module, an X-axis detection camera, a jig platform and a Y-axis transfer module; the X-axis transfer module, the Z-axis welding module and the X-axis detection camera are all arranged on the rack; the pair of Y-axis transfer modules is arranged on the X-axis transfer module in parallel; the pair of jig platforms are arranged on the pair of Y-axis transfer modules in a one-to-one correspondence manner; an adsorption surface is arranged on the jig platform, and the jig platform can drive the adsorption surface to rotate around the X-axis direction; the adsorption surfaces of the pair of jig platforms are oppositely arranged in parallel; the pair of X-axis detection cameras are correspondingly arranged on the outer sides of the pair of Y-axis transfer modules; the Z-axis welding module comprises a Z-axis transfer module, a welding head and a Z-axis detection camera; the Z-axis transfer module is arranged on the rack; the welding head and the Z-axis detection camera are both installed on the Z-axis transfer module.

Description

Technical Field

[0001] The invention relates to the technical field of precious metal welding, and in particular to a precious metal automatic welding machine and a welding method. Background Art

[0002] Precious metals mainly refer to metal elements such as gold, silver and platinum group metals. Most of these metals have beautiful colors and strong chemical stability and are often used in the production of jewelry.

[0003] Precious metal welding machines are used to weld precious metals, including welding of the joint surfaces of rings and bracelets, and welding between precious metal products cast in parts, such as welding the joint surface contours of a pair of metal blocks.

[0004] At present, most of the precious metal welding machines on the market have low welding precision, and except for the welding part, they are basically manually operated, with long production hours and low automation. Taking the precious metal welding machine with laser welding as an example, the metal product is manually placed in the welding station, the detection camera scans the contour of the metal product, the laser head obtains the contour information and performs laser welding, and finally the welded metal product is manually picked up for cutting. This processing method has acceptable welding precision for bracelets, but it has poor adaptability to the welding precision between precious metal products cast in parts, resulting in low welding precision of the welding method of part casting, and problems such as loose welding and rough welds, which seriously affect the appearance quality of the product. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a precious metal automatic welding machine and a welding method, which solve the technical problem that the existing precious metal welding machine has low welding accuracy for precious metal products cast in parts.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned object, the precious metal automatic welding machine of the present invention comprises a frame, an X-axis transfer module, a Z-axis welding module, a pair of X-axis detection cameras, a pair of fixture platforms and a pair of Y-axis transfer modules;

[0009] The X-axis transfer module, the Z-axis welding module and the X-axis detection camera are all arranged on the frame; a pair of Y-axis transfer modules are arranged in parallel on the X-axis transfer module;

[0010] A pair of the jig platforms are arranged one by one on a pair of the Y-axis transfer modules; an adsorption surface is arranged on the jig platform, and the jig platform can drive the adsorption surface to rotate around the X-axis direction; the adsorption surfaces of the pair of jig platforms are arranged oppositely and parallel; a pair of the X-axis detection cameras are arranged correspondingly on the outside of the pair of the Y-axis transfer modules; the X-axis detection cameras can detect workpieces on the adsorption surface away from their installation positions;

[0011] The Z-axis welding module includes a Z-axis transfer module, a welding head and a Z-axis detection camera; the Z-axis transfer module is arranged on the frame; the welding head and the Z-axis detection camera are both installed on the Z-axis transfer module; the Z-axis detection camera can detect a pair of the workpieces after bonding and welding.

[0012] Optionally, the Z-axis welding module further includes a rotary reducer;

[0013] The rotary reducer is installed on the Z-axis transfer module;

[0014] The welding head and the Z-axis detection camera are both installed on the rotary reducer; the rotary reducer can synchronously drive the welding head and the Z-axis detection camera to rotate around the X-axis direction.

[0015] Optionally, the Z-axis welding module further includes a displacement sensor;

[0016] The displacement sensor is installed on the rotary reducer; the displacement sensor can scan the contour positions of the pair of workpieces after bonding.

[0017] Optionally, the fixture platform includes a connecting plate, a first rotary drive and a fixture;

[0018] The connecting plate is connected to the Y-axis transfer module;

[0019] The first rotary drive is connected to the connecting plate;

[0020] The fixture is connected to the rotating shaft of the first rotary driver.

[0021] Optionally, the fixture platform further includes an electric slide and a slide plate;

[0022] The electric slide is mounted on the connecting plate;

[0023] The slide plate is slidably connected to the electric slide table along the Z axis;

[0024] The first rotary drive is mounted on the slide plate.

[0025] Optionally, a groove is provided on the adsorption surface; and an adsorption hole is provided in the groove;

[0026] The depth of the groove is less than the thickness of the workpiece.

[0027] Optionally, the X-axis detection camera includes a concave mounting frame, a camera body, a sub-plate and an aperture;

[0028] The bottom end of the concave mounting frame is connected to the frame, the camera body is mounted on the top surface of the top end, and the sub-board is connected to the bottom surface of the top end;

[0029] The aperture is connected to the sub-plate.

[0030] Furthermore, the present invention also provides a welding method of a precious metal automatic welding machine, the welding method of the precious metal automatic welding machine is implemented based on the precious metal automatic welding machine as described above, and the welding method comprises:

[0031] Loading semi-finished workpieces: adsorbing two semi-finished workpieces onto a pair of adsorption surfaces respectively;

[0032] Primary contour scanning: the Y-axis transfer module drives the fixture platform to move along the Y-axis to the workpiece inspection station, and the X-axis inspection camera performs a primary contour scan on the semi-finished workpiece far away from its installation position;

[0033] According to the information of the primary contour scanning, the Y-axis transfer module drives the fixture platform to move along the Y-axis, and the X-axis transfer module drives a pair of the Y-axis transfer modules to move along the X-axis, so that the opposite surfaces of the two semi-finished workpieces are fitted together to form a pre-assembled workpiece;

[0034] Secondary contour scanning: a pair of the Y-axis transfer modules synchronously drive a pair of the fixture platforms to move along the Y-axis to below the Z-axis detection camera, and the Z-axis detection camera performs a secondary contour scan on the pre-installed workpiece;

[0035] According to the information of the secondary profile scanning, the Y-axis transfer module drives the fixture platform to move along the Y-axis, and the X-axis transfer module drives a pair of the Y-axis transfer modules to move along the X-axis, so that the center of the pre-installed workpiece, the welding head and the displacement sensor are located in the same vertical plane;

[0036] Three-level contour scanning: the Y-axis transfer module drives the fixture platform to move along the Y-axis so that the rotation center of the pre-installed workpiece and the displacement sensor are located on the same vertical line; the Z-axis welding module drives the pre-installed workpiece to rotate around the X-axis direction and performs a three-level contour scan on the pre-installed workpiece;

[0037] Welding: Based on the information from the three-level profile scan, the Y-axis transfer module drives the pre-installed workpiece to move along the Y-axis to the bottom of the welding head; the welding head welds the pre-installed workpiece to form a finished workpiece;

[0038] Finished workpiece unloading: moving the finished workpiece to below the Z-axis inspection camera, and the Z-axis inspection camera performs defect inspection on the finished workpiece;

[0039] The finished workpiece is moved to the workpiece unloading station for unloading.

[0040] Optionally, based on the information from the three-level profile scan, the Y-axis transfer module and the X-axis transfer module jointly drive the pre-installed workpiece to move to the bottom of the welding head.

[0041] Optionally, during welding, the Z-axis transfer module, the X-axis transfer module, the fixture platform and the rotary reducer are linked to adjust the welding distance between the welding head and the pre-installed workpiece to within a preset range.

[0042] (III) Beneficial effects

[0043] The beneficial effects of the present invention are:

[0044] The adsorption surfaces of a pair of fixture platforms are arranged oppositely and in parallel. The X-axis detection camera can detect the workpiece on the adsorption surface far away from its installation position, so that the adsorption surface can realize contour scanning and fitting of pre-installed workpieces on the sliding path along the Y-axis. There is no need to frequently flip the adsorption surface, which simplifies the equipment structure and saves production time.

[0045] The X-axis inspection camera can perform a primary contour scan on the workpiece on the adsorption surface to obtain the contour position information of the workpiece on the adsorption surface to improve the docking accuracy of a pair of workpieces. The Z-axis inspection camera can perform a secondary contour scan on the pair of workpieces after bonding to obtain the position information of the contour to be welded of the pre-installed workpiece, that is, the contour of the bonding surface, so as to move the contour to be welded of the pre-installed workpiece to the vertical plane where the welding head is located, improve the relative position accuracy of the two, and thus improve the welding accuracy. The Z-axis inspection camera can also perform defect detection on the finished workpiece after welding to strictly control product quality.

[0046] The precious metal automatic welding machine can weld the joint surfaces of rings and bracelets, and can also weld the joint surface contours of precious metal products cast in parts. It only needs to replace the model of the corresponding fixture, and has strong adaptability to the welding needs of different precious metal jewelry. The fixture platform can drive the adsorption surface to rotate around the X-axis direction to form a closed-loop weld, which effectively improves the welding quality compared to the spot welding method.

[0047] The precious metal automatic welding machine transfers the workpiece through the cooperation of the X-axis transfer module, the Y-axis transfer module and the Z-axis transfer module, and obtains the position information and defect information of the workpiece through the Z-axis detection camera and the X-axis detection camera, thereby realizing the automatic welding and loading and unloading of precious metal products, with a high degree of automation and short production time. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a structural schematic diagram of the precious metal automatic welding machine of the present invention;

[0049] Figure 2 It is a structural schematic diagram of the Z-axis welding module of the present invention;

[0050] Figure 3 It is a structural schematic diagram of the fixture platform of the present invention;

[0051] Figure 4 It is a structural schematic diagram of the Y-axis transfer module of the present invention;

[0052] Figure 5 It is a structural schematic diagram of the X-axis detection camera of the present invention.

[0053] [Description of Reference Numerals]

[0054] 1: rack;

[0055] 2: X-axis transfer module;

[0056] 3: Z-axis welding module; 31: Z-axis transfer module; 32: welding head; 33: Z-axis detection camera; 34: rotary reducer; 35: displacement sensor;

[0057] 4: X-axis detection camera; 41: concave mounting bracket; 42: camera body; 43: sub-board; 44: aperture;

[0058] 5: fixture platform; 51: adsorption surface; 511: groove; 52: connecting plate; 53: first rotary drive; 54: fixture; 55: electric slide; 56: slide plate;

[0059] 6: Y-axis transfer module; 61: second rotary drive; 62: guide rail; 63: lead screw; 64: drag chain. DETAILED DESCRIPTION

[0060] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0061] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0062] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] See also Figures 1 to 3 The present invention provides a precious metal automatic welding machine, which includes a frame 1, an X-axis transfer module 2, a Z-axis welding module 3, a pair of X-axis detection cameras 4, a pair of fixture platforms 5 and a pair of Y-axis transfer modules 6; the X-axis transfer module 2, the Z-axis welding module 3 and the X-axis detection camera 4 are all arranged on the frame 1; the pair of Y-axis transfer modules 6 are arranged in parallel on the X-axis transfer module 2; the pair of fixture platforms 5 are arranged on the pair of Y-axis transfer modules 6 in a one-to-one correspondence; the fixture platform 5 is provided with an adsorption surface 51, and the fixture platform 5 can drive the adsorption surface 51 to rotate around the X-axis Rotate toward the right direction; a pair of adsorption surfaces 51 of the fixture platform 5 are arranged oppositely and parallel; a pair of X-axis detection cameras 4 are arranged correspondingly on the outside of a pair of Y-axis transfer modules 6; the X-axis detection camera 4 can detect the workpiece on the adsorption surface 51 away from its installation position; the Z-axis welding module 3 includes a Z-axis transfer module 31, a welding head 32 and a Z-axis detection camera 33; the Z-axis transfer module 31 is arranged on the frame 1; the welding head 32 and the Z-axis detection camera 33 are both installed on the Z-axis transfer module 31; the Z-axis detection camera 33 can detect a pair of workpieces after bonding and welding.

[0065] In this embodiment, the X-axis transfer module 2, the Y-axis transfer module 6 and the Z-axis transfer module 31 all use screw motor modules. Figure 4For example, the Y-axis transfer module 6 includes a second rotary drive 61, a guide rail 62, a screw 63 and a drag chain 64, which is a conventional screw motor module; the second rotary drive 61 is a motor; the guide rail 62 and the screw 63 are arranged along the Y axis, which are used to limit and guide the sliding of the fixture platform 5 along the Y axis; the drag chain 64 is used to improve the operation stability of the module. The welding head 32 uses a laser welding head. The X-axis transfer modules 2 are arranged in pairs, correspondingly arranged under a pair of Y-axis transfer modules 6, so as to drive the Y-axis transfer modules 6 to move respectively.

[0066] It should be noted that the X-axis, Y-axis and Z-axis form a spatial rectangular coordinate system, and the X-axis transfer module 2, the Y-axis transfer module 6 and the Z-axis transfer module 31 can slide along the X-axis, Y-axis and Z-axis respectively. The detection camera can detect the position and welding defects of the workpiece. The position detection includes scanning the contour position of the workpiece; welding defects include welds, cracks, pits, etc.

[0067] The adsorption surfaces 51 of a pair of jig platforms 5 are arranged oppositely and parallel, and the X-axis detection camera 4 can detect the workpiece on the adsorption surface 51 far away from its installation position, so that the adsorption surface 51 can realize contour scanning and fitting of pre-installed workpieces on the sliding path along the Y-axis, without frequently flipping the adsorption surface 51, that is, the adsorption surface 51 does not need to be frequently flipped between the side facing the X-axis detection camera 4 and the side away from the X-axis detection camera 4, which simplifies the equipment structure and saves production time.

[0068] The X-axis detection camera 4 can perform a primary contour scan on the workpiece on the adsorption surface 51 to obtain the contour position information of the workpiece on the adsorption surface 51 to improve the docking accuracy when a pair of workpieces are docked. The Z-axis detection camera 33 can perform a secondary contour scan on the pair of workpieces after bonding to obtain the position information of the contour to be welded of the pre-installed workpiece, that is, the contour of the bonding surface, so as to move the contour to be welded of the pre-installed workpiece to the vertical plane where the welding head 32 is located, thereby improving the relative position accuracy of the two and further improving the welding accuracy. The Z-axis detection camera 33 can also perform defect detection on the finished workpiece after welding to strictly control product quality.

[0069] The precious metal automatic welding machine can perform welding operations on the joint surfaces of rings and bracelets, and can also perform welding operations on the joint surface contours of precious metal products cast in parts. The model of the jig 54 can be replaced accordingly, and it has strong adaptability to the welding requirements of different precious metal jewelry. The jig platform 5 can drive the adsorption surface 51 to rotate around the X-axis direction to form a closed-loop weld, which effectively improves the welding quality compared to the spot welding method.

[0070] The precious metal automatic welding machine transfers the workpiece through the cooperation of the X-axis transfer module 2, the Y-axis transfer module 6 and the Z-axis transfer module 31, obtains the position information and defect information of the workpiece through the Z-axis detection camera 33 and the X-axis detection camera 4, and realizes automatic welding and loading and unloading of precious metal products, with a high degree of automation and short production time.

[0071] Furthermore, the Z-axis welding module 3 also includes a rotary reducer 34; the rotary reducer 34 is installed on the Z-axis transfer module 31; the welding head 32 and the Z-axis detection camera 33 are both installed on the rotary reducer 34; the rotary reducer 34 can synchronously drive the welding head 32 and the Z-axis detection camera 33 to rotate around the X-axis direction. In this embodiment, the rotary reducer 34 includes a motor, a reducer and a turntable; the rotating shaft of the motor is connected to the reducer; the turntable is arranged on the reducer, and the reducer has a built-in gear set, and the gear set is connected to the turntable, so that the motor can drive the turntable to rotate around the X-axis, thereby driving the welding head 32 and the Z-axis detection camera 33 installed on the turntable to rotate, and realize the adjustment of the welding angle of the welding head 32 relative to the pre-installed workpiece, so that the welding head 32 can weld the welding dead corner of the pre-installed workpiece, thereby improving the welding quality of the product.

[0072] Secondly, the Z-axis welding module 3 also includes a displacement sensor 35; the displacement sensor 35 is installed on the rotary reducer 34; the displacement sensor 35 can scan the contour position of a pair of workpieces after bonding. Specifically, the position of the pre-installed workpiece is first obtained through the Z-axis detection camera 33, and the jig platform 5 is moved to the vertical plane where the welding head 32 and the displacement sensor 35 are located, so as to facilitate the subsequent displacement sensor 35 to scan the contour to be welded and weld the welding head 32. By arranging the welding head 32 and the displacement sensor 35 in the same vertical plane, and the vertical plane is parallel to the Y axis, the jig platform 5 does not need to frequently move along the X axis between the welding head 32 and the displacement sensor 35 during the operation, which simplifies the transportation steps of the jig platform 5 and shortens the product processing time.

[0073] In addition, the fixture platform 5 includes a connecting plate 52, a first rotary driver 53 and a fixture 54; the connecting plate 52 is connected to the Y-axis transfer module 6; the first rotary driver 53 is connected to the connecting plate 52; and the fixture 54 is connected to the rotating shaft of the first rotary driver 53. The first rotary driver 53 can drive the fixture 54 to rotate around the X-axis to adjust the docking accuracy of a pair of workpieces, and realize the rotation welding of pre-assembled workpieces to form a closed-loop weld, which meets the welding processing of precious metals of multiple varieties and multiple working conditions.

[0074] Furthermore, the fixture platform 5 also includes an electric slide 55 and a slide plate 56; the electric slide 55 is mounted on the connecting plate 52; the slide plate 56 is slidably connected to the electric slide 55 along the Z axis; and the first rotary driver 53 is mounted on the slide plate 56. In this embodiment, the electric slide 55 is a screw motor module, which can drive the fixture 54 to move along the Z axis to achieve compensation adjustment of the height difference. For example, after a pair of X-axis detection cameras 4 scan the corresponding workpieces, the electric slide 55 can compensate for the height difference of the pair of workpieces to improve the docking accuracy of the pre-installed workpieces.

[0075] Secondly, a groove 511 is provided on the adsorption surface 51; an adsorption hole is provided in the groove 511; and the depth of the groove 511 is less than the thickness of the workpiece. The groove 511 is provided in accordance with the shape of the workpiece, and the groove 511 cooperates with the adsorption hole to enhance the connection strength with the workpiece and improve the stability of the workpiece transportation. The depth of the groove 511 is less than the thickness of the workpiece, so that the groove 511 can engage the workpiece without interfering with the operation of the welding head 32.

[0076] like Figure 5 As shown, the X-axis detection camera 4 includes a concave mounting frame 41, a camera body 42, a sub-board 43 and an aperture 44; the bottom end of the concave mounting frame 41 is connected to the frame 1, the top surface of the top end is mounted with the camera body 42, and the bottom surface of the top end is connected with the sub-board 43; the aperture 44 is connected to the sub-board 43. The concave mounting frame 4 is a concave structure, so that components can be installed on the top and bottom surfaces of the top plate of the concave mounting frame 4, thereby realizing the suspended installation of the aperture 44, and the aperture 44 is installed with a certain height difference from the camera body 42, optimizing the installation structure of the aperture 44 and reducing the space occupied by the equipment.

[0077] In addition, the present invention also provides a welding method of a precious metal automatic welding machine. The welding method of the precious metal automatic welding machine is implemented based on the precious metal automatic welding machine as described above, and the welding method includes:

[0078] Loading of semi-finished workpieces: adsorbing two semi-finished workpieces on a pair of adsorption surfaces 51 respectively; the loading can be done manually or by an external robot;

[0079] First-level contour scanning: the Y-axis transfer module 6 drives the fixture platform 5 to move along the Y-axis to the workpiece inspection station, and the X-axis inspection camera 4 performs a first-level contour scanning on the semi-finished workpiece far away from its installation position; the first-level contour scanning includes defect detection and position acquisition of the workpiece. Defect detection can remove defective workpieces to prevent defective products from flowing into the equipment for processing, saving processing costs; position acquisition is to obtain the spatial position of the workpiece, perform angle compensation through the first rotary driver 53, align the workpiece, and compensate the height difference between a pair of workpieces through the electric slide 55 to achieve high-precision docking of a pair of workpieces;

[0080] According to the information of the primary contour scanning, the Y-axis transfer module 6 drives the fixture platform 5 to move along the Y-axis, and the X-axis transfer module 2 drives a pair of Y-axis transfer modules 6 to move along the X-axis, so that the opposite surfaces of the two semi-finished workpieces are fitted together to form a pre-assembled workpiece; it should be noted that when the models and categories of the two semi-finished workpieces are different, the opposite surfaces of the two semi-finished workpieces do not completely overlap, and they can be flexibly fitted according to the actual shapes of the two semi-finished workpieces;

[0081] Secondary profile scanning: A pair of Y-axis transfer modules 6 synchronously drive a pair of fixture platforms 5 to move along the Y-axis to the bottom of the Z-axis detection camera 33, and the Z-axis detection camera 33 performs a secondary profile scan on the pre-installed workpiece; similarly, the secondary profile scan performs defect detection and position acquisition on the pre-installed workpiece;

[0082] According to the information of the secondary profile scanning, the Y-axis transfer module 6 drives the fixture platform 5 to move along the Y-axis, and the X-axis transfer module 2 drives a pair of Y-axis transfer modules 6 to move along the X-axis, so that the center of the pre-installed workpiece, the welding head 32 and the displacement sensor 35 are located in the same vertical plane, which facilitates the pre-installed workpiece to move between the welding head 32 and the displacement sensor 35;

[0083] According to the information of the secondary profile scanning, the Y-axis transfer module 6 and the X-axis transfer module 2 jointly drive a pair of fixture platforms 5 to perform compensation movement to improve the docking accuracy of the pre-installed workpiece; then move the pair of fixture platforms 5 to the center of the pre-installed workpiece, the welding head 32 and the displacement sensor 35 in the same vertical plane;

[0084] Three-level contour scanning: the Y-axis transfer module 6 drives the fixture platform 5 to move along the Y-axis so that the rotation center of the pre-installed workpiece and the displacement sensor 35 are located on the same vertical line; the Z-axis welding module 3 drives the pre-installed workpiece to rotate around the X-axis direction and performs a three-level contour scan on the pre-installed workpiece; the three-level contour scanning is used to obtain the spatial position of the contour to be welded;

[0085] Welding: Based on the information from the three-level profile scan, the Y-axis transfer module 6 drives the pre-installed workpiece to move along the Y-axis to the bottom of the welding head 32; the welding head 32 welds the pre-installed workpiece to form a finished workpiece;

[0086] Finished workpiece unloading: the finished workpiece is moved to the bottom of the Z-axis inspection camera 33, and the Z-axis inspection camera 33 performs defect inspection on the finished workpiece to inspect the finished workpiece defects and welding quality;

[0087] The finished workpiece is moved to the workpiece unloading station for unloading, realizing automatic welding of precious metals with high welding precision.

[0088] Further, according to the information of the three-level profile scanning, the Y-axis transfer module 6 and the X-axis transfer module 2 jointly drive the pre-installed workpiece to move to the bottom of the welding head 32. The position of the pre-installed workpiece is obtained by the displacement sensor 35, and the Y-axis transfer module 6 and the X-axis transfer module 2 jointly drive a pair of fixture platforms 5 to move, and further compensate and adjust the docking accuracy of the pre-installed workpiece, thereby further improving the welding accuracy.

[0089] Secondly, during welding, the four axes of the Z-axis transfer module 31, the X-axis transfer module 2, the first rotary drive 53 and the rotary reducer 34 are linked to adjust the welding distance between the welding head 32 and the pre-installed workpiece to a preset range, which can not only enable the welding head 32 to weld the welding dead corners, but also enable the welding head 32 to always be at a distance position with a pair of workpieces to be welded during the welding process for a better welding effect, thereby improving the welding quality.

[0090] It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, but the present invention is not limited to the above specific implementation methods. Any changes or modifications made within the scope of the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. A precious metal automatic welding machine, characterized in that: The noble metal automatic welding machine comprises a frame (1), an X-axis transfer module (2), a Z-axis welding module (3), a pair of X-axis detection cameras (4), a pair of fixture platforms (5) and a pair of Y-axis transfer modules (6); The X-axis transfer module (2), the Z-axis welding module (3) and the X-axis detection camera (4) are all arranged on the frame (1); a pair of Y-axis transfer modules (6) are arranged in parallel on the X-axis transfer module (2); A pair of the jig platforms (5) are arranged on a pair of the Y-axis transfer modules (6) in a one-to-one correspondence; an adsorption surface (51) is arranged on the jig platform (5), and the jig platform (5) can drive the adsorption surface (51) to rotate around the X-axis direction; A pair of adsorption surfaces (51) of the jig platform (5) are arranged oppositely and in parallel; a pair of X-axis detection cameras (4) are arranged correspondingly on the outside of a pair of Y-axis transfer modules (6); the X-axis detection cameras (4) are capable of detecting workpieces on the adsorption surfaces (51) away from their installation positions; The Z-axis welding module (3) comprises a Z-axis transfer module (31), a welding head (32) and a Z-axis detection camera (33); the Z-axis transfer module (31) is arranged on the frame (1); the welding head (32) and the Z-axis detection camera (33) are both installed on the Z-axis transfer module (31); the Z-axis detection camera (33) can detect a pair of the workpieces after bonding and welding.

2. The precious metal automatic welding machine according to claim 1, characterized in that: The Z-axis welding module (3) further comprises a rotary reducer (34); The rotary reducer (34) is installed on the Z-axis transfer module (31); The welding head (32) and the Z-axis detection camera (33) are both mounted on the rotary reducer (34); the rotary reducer (34) can synchronously drive the welding head (32) and the Z-axis detection camera (33) to rotate around the X-axis direction.

3. The precious metal automatic welding machine according to claim 2, characterized in that: The Z-axis welding module (3) further comprises a displacement sensor (35); The displacement sensor (35) is mounted on the rotary reducer (34); the displacement sensor (35) is capable of scanning the contour positions of the pair of workpieces after bonding.

4. The precious metal automatic welding machine according to claim 3, characterized in that: The fixture platform (5) comprises a connecting plate (52), a first rotary drive (53) and a fixture (54); The connecting plate (52) is connected to the Y-axis transfer module (6); The first rotary driver (53) is connected to the connecting plate (52); The fixture (54) is connected to the rotating shaft of the first rotary driver (53).

5. The precious metal automatic welding machine according to claim 4, characterized in that: The fixture platform (5) further comprises an electric slide (55) and a slide plate (56); The electric slide (55) is mounted on the connecting plate (52); The slide plate (56) is slidably connected to the electric slide table (55) along the Z axis; The first rotary drive (53) is mounted on the slide plate (56).

6. The precious metal automatic welding machine according to claim 4, characterized in that: The adsorption surface (51) is provided with a groove (511); and the groove (511) is provided with an adsorption hole; The depth of the groove (511) is less than the thickness of the workpiece.

7. The precious metal automatic welding machine according to claim 3, characterized in that: The X-axis detection camera (4) comprises a concave mounting frame (41), a camera body (42), a sub-plate (43) and an aperture (44); The bottom end of the concave mounting frame (41) is connected to the frame (1), the top surface of the top end is mounted with the camera body (42), and the bottom surface of the top end is connected with the sub-board (43); The aperture (44) is connected to the sub-plate (43).

8. A welding method for a precious metal automatic welding machine, characterized in that: The welding method of the precious metal automatic welding machine is implemented based on the precious metal automatic welding machine according to any one of claims 3 to 7, and the welding method comprises: Loading the semi-finished workpieces: adsorbing two semi-finished workpieces correspondingly on a pair of adsorption surfaces (51); First-level contour scanning: the Y-axis transfer module (6) drives the fixture platform (5) to move along the Y-axis to the workpiece detection station, and the X-axis detection camera (4) performs a first-level contour scanning on the semi-finished workpiece far away from its installation position; According to the information of the primary contour scanning, the Y-axis transfer module (6) drives the fixture platform (5) to move along the Y-axis, and the X-axis transfer module (2) drives a pair of the Y-axis transfer modules (6) to move along the X-axis, so that the opposite surfaces of the two semi-finished workpieces are fitted together to form a pre-assembled workpiece; Secondary contour scanning: a pair of the Y-axis transfer modules (6) synchronously drive a pair of the fixture platforms (5) to move along the Y-axis to below the Z-axis detection camera (33), and the Z-axis detection camera (33) performs a secondary contour scanning on the pre-installed workpiece; According to the information of the secondary profile scanning, the Y-axis transfer module (6) drives the fixture platform (5) to move along the Y-axis, and the X-axis transfer module (2) drives a pair of the Y-axis transfer modules (6) to move along the X-axis, so that the center of the pre-installed workpiece, the welding head (32) and the displacement sensor (35) are located in the same vertical plane; Three-level contour scanning: the Y-axis transfer module (6) drives the fixture platform (5) to move along the Y-axis so that the rotation center of the pre-installed workpiece and the displacement sensor (35) are located on the same vertical line; the Z-axis welding module (3) drives the pre-installed workpiece to rotate around the X-axis direction and performs a three-level contour scanning on the pre-installed workpiece; Welding: Based on the information from the three-level contour scanning, the Y-axis transfer module (6) drives the pre-installed workpiece to move along the Y-axis to below the welding head (32); the welding head (32) welds the pre-installed workpiece to form a finished workpiece; Finished workpiece unloading: moving the finished workpiece to below the Z-axis detection camera (33), and the Z-axis detection camera (33) performs defect detection on the finished workpiece; The finished workpiece is moved to the workpiece unloading station for unloading.

9. The welding method of the noble metal automatic welding machine according to claim 8, characterized in that: Based on the information from the three-level profile scan, the Y-axis transfer module (6) and the X-axis transfer module (2) jointly drive the pre-installed workpiece to move below the welding head (32).

10. The welding method of the noble metal automatic welding machine according to claim 8, characterized in that: During welding, the Z-axis transfer module (31), the X-axis transfer module (2), the fixture platform (5) and the rotary reducer (34) are linked to adjust the welding distance between the welding head (32) and the pre-installed workpiece to within a preset range.

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