Circular weld centering device and welding device

Abstract

The utility model provides a centering device for a circular weld joint, a workpiece is provided with a plurality of circular weld joints, the circle centers of the circular weld joints are located on the same straight line and are not concentrically arranged, the centering device comprises a rotating mechanism, a centering mechanism and a centering mechanism, and the rotating mechanism comprises a rotating driver and a rotating table which is driven by the rotating driver to rotate around a first axis; the linear translation mechanism comprises a translation driver and a translation piece which is driven by the translation driver to translate on the rotating table in the first direction, and the first direction is perpendicular to the first axis; the positioning assembly comprises a base and a positioning seat, the base is arranged on the translation piece, the positioning seat is located on the base and can be adjusted in position in the second direction, the second direction is perpendicular to the first axis, an angle is formed between the second direction and the first direction, and the positioning seat can be matched and positioned with a workpiece to be welded. The device can reduce the clamping times for determining the circle center during welding, reduce error accumulation, greatly reduce the welding difficulty of a small circular weld joint and ensure the welding quality.

Description

Technical Field

[0001] The present application belongs to the field of welding technology, and more specifically, relates to a centering device and a welding device for a circular weld. Background Art

[0002] In a certain product, during production, it is necessary to weld multiple circular interfaces on the workpiece. These circular interfaces are arranged in a straight line and are not concentric. The welds between these interfaces and the cover body are circular welds. The multiple circular welds are welded in sequence with the center of the circle, and the clamping and adjustment times are many, resulting in large error accumulation. In addition, the diameter of the circular weld is small, and when the welding head is used to follow a small circular welding trajectory, welding is difficult, welding deviation is easy to occur, and it is difficult to ensure welding quality. Utility Model Content

[0003] The embodiment of the present application provides a centering device for a circular weld, which can reduce the number of clamping times for determining the center of the circle during welding, reduce error accumulation, greatly reduce the welding difficulty of small circular welds, and ensure welding quality.

[0004] The technical solution adopted in the embodiment of the present application is: to provide a centering device for a circular weld, wherein the workpiece has a plurality of circular welds, the centers of the circular welds are located on the same straight line and are non-concentrically arranged, and the centering device for the circular welds comprises:

[0005] A rotating mechanism, comprising a rotating drive and a rotating table driven by the rotating drive to rotate about a first axis;

[0006] A linear translation mechanism, comprising a translation driver and a translation member driven by the translation driver to translate along a first direction on the rotating table, wherein the first direction is perpendicular to the first axis;

[0007] A positioning assembly, comprising a base and a positioning seat, wherein the base is disposed on the translation member, the positioning seat is located on the base and can adjust its position along a second direction, the second direction is perpendicular to the first axis and forms an angle with the first direction, the positioning seat can match and position the workpiece to be welded, when the workpiece to be welded is positioned on the positioning assembly, the straight line where the center of each circle is located is parallel to the first direction, and the translation driver can also drive the translation member to move a specified distance; and

[0008] The clamping mechanism is arranged on the base, and the clamping mechanism can clamp and fix the workpiece to be welded on the positioning seat.

[0009] Furthermore, the base is provided with a slide groove extending along the second direction, and the positioning seat is slidably arranged in the slide groove in a matching manner.

[0010] Furthermore, the positioning assembly also includes adjustment blocks arranged at both ends of the slide slot and an adjustment rod passing through the adjustment blocks, one end of the adjustment rod extends into the slide slot and abuts against the positioning seat, and the length of the adjustment rod extending into the slide slot is adjustable.

[0011] Furthermore, the positioning seat includes a pad block that slides in matching fashion with the slide groove, a positioning block that is detachably mounted on the pad block, and a positioning column that is detachably mounted on the positioning block. The pad block is provided with at least two positioning pins, the workpiece to be welded is provided with pin holes corresponding to the positioning pins, and the positioning column is adapted to an interface on the workpiece to be welded.

[0012] Furthermore, the positioning assembly also includes a support block, which is arranged on the base and located on both sides of the positioning seat. The support block has a flat support end surface, and the workpiece to be welded is supported on the support end surface after being positioned in cooperation with the positioning pin.

[0013] Furthermore, the clamping mechanism includes a pressing plate and a connecting rod assembly connected to the pressing plate, the connecting assembly is arranged on the base, the pressing plate can drive the pressing plate to descend above the positioning assembly to clamp the workpiece or rise to loosen the workpiece, the pressing plate is provided with an opening, and the circular weld of the workpiece to be welded is located in the opening.

[0014] Furthermore, the connecting rod assembly comprises:

[0015] A fixed hinge frame, comprising a fixed portion arranged on the base and a hinge support portion vertically connected to one end of the fixed portion;

[0016] The pressure rod comprises a pressing part and an upper folding part bent and connected to one end of the pressing part, the pressing plate is arranged on the pressing part, and one end of the upper folding part close to the pressing part is hinged to one end of the hinge part away from the fixing part;

[0017] A support rod, one end of which is hinged to an end of the fixing portion away from the hinged branch;

[0018] A handle, comprising a handle, a connecting portion and an upturned portion connected in sequence, wherein an angle is formed between the upturned portion and the connecting portion, the upturned portion is hinged to an end of the upturned portion away from the pressing portion, and the connecting portion is hinged to the middle portion of the support rod;

[0019] Wherein, the connecting rod assembly has an open state and a clamped state. In the open state, the pressure rod and the handle move upward toward each other, and in the clamped state, the pressure rod and the handle move away from each other, and one end of the support rod away from the fixed part is supported on the upper folding part.

[0020] Furthermore, it also includes a winding frame, and the winding frame includes:

[0021] An inner frame, comprising an inner ring surrounding the rotating table and inner legs supporting the inner ring;

[0022] An outer frame, comprising an outer ring surrounding the inner ring and outer legs supporting the outer ring, with a gap between the outer ring and the inner ring;

[0023] The cable of the linear translation mechanism is in the interval and coiled on the inner frame, so that the linear translation mechanism can rotate forward and reverse by at least 180° along with the rotating table.

[0024] An embodiment of the present application further provides a welding device including the circular weld centering device described above, and also including a welding mechanism, wherein the welding mechanism includes a welding head that can weld the workpiece on the positioning assembly.

[0025] The beneficial effect of the centering device of the circular weld provided by the embodiment of the present application is that: the centering device of the circular weld provided by the embodiment of the present application, the clamping mechanism clamps and fixes the workpiece to be welded on the positioning seat, the positioning seat can be translated along the second direction on the base, and can be translated along the first direction with the translation member, that is, the center of a circular weld of the workpiece to be welded can be translated on the plane formed by the first direction and the second direction. Since the first direction and the second direction are both perpendicular to the first axis, the center of the circle can be moved to the first axis of the rotating table. In this way, when welding, it is only necessary to rotate the rotating table to cooperate with the welding head for welding, and the welding head does not need to follow a circular trajectory, which greatly reduces the difficulty of welding, reduces welding deviation, and ensures welding quality. In addition, after determining the center of a circular weld, the translation member is driven by the translation driver to move a specified distance along the first direction, and the distance is equal to the distance between the two centers of the circle, so that the center of another circular weld can be moved to the first axis, which greatly speeds up the positioning switching speed of the center of the circle of different circular welds, reduces the number of clamping adjustments, reduces the difficulty of determining multiple centers of the circle, and is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 A schematic diagram of the three-dimensional structure of a centering device for a circular weld provided in an embodiment of the present application;

[0028] Figure 2 A side view of a centering device for a circular weld provided in an embodiment of the present application;

[0029] Figure 3 A top view of a centering device for a circular weld provided in an embodiment of the present application;

[0030] Figure 4 A schematic diagram of the three-dimensional structure of the positioning assembly and the clamping mechanism provided in the embodiment of the present application;

[0031] Figure 5 A schematic diagram of positioning a workpiece on a positioning assembly provided in an embodiment of the present application;

[0032] Figure 6 A partial schematic diagram of the forward assembly of a workpiece and a first positioning pin provided in an embodiment of the present application;

[0033] Figure 7 A partial schematic diagram of reverse assembly of a workpiece and a second positioning pin provided in an embodiment of the present application;

[0034] Figure 8 A schematic diagram of the three-dimensional structure of a positioning assembly provided in an embodiment of the present application;

[0035] Fig. 9 An exploded view of a positioning assembly provided in an embodiment of the present application;

[0036] Fig.10 A schematic diagram of the three-dimensional structure of the connecting rod assembly in the open state provided by an embodiment of the present application;

[0037] Fig.11 A side view of the connecting rod assembly in a compressed state provided in an embodiment of the present application.

[0038] Among them, the reference numerals in the figure are:

[0039] 10. Rotation mechanism; 11. Rotation driver; 12. Rotation table; Z, first axis;

[0040] 20. linear translation mechanism; 21. translation driver; 22. translation member; X, first direction;

[0041] 30. Positioning assembly; 31. Base; 311. Slide; 32. Positioning seat; 321. Cushion block; 322. Positioning block; 323. Positioning column; 324. Positioning pin; 3241. First positioning pin; 3242. Second positioning pin; 33. Adjustment block; 34. Adjustment rod; 36. Support block; 361. Support end surface; Y second direction;

[0042] 40. Clamping mechanism; 41. Pressing plate; 411. Opening; 42. Connecting rod assembly; 421. Fixed hinge frame; 4211. Fixed portion; 4212. Hinge portion; 422. Pressing rod; 4221. Clamping portion; 4222. Upper folding portion; 423. Support rod; 424. Handle; 4241. Handle; 4242. Connecting portion; 4243. Upturned portion;

[0043] 50, winding frame; 51, inner frame; 511, inner ring; 512, inner support leg; 52, outer frame; 521, outer ring; 522, outer support leg;

[0044] 60. Workpiece; 61. Pin hole; 62. Interface; 63. Circular weld. DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0047] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] See also Figure 1 , the centering device for the circular weld provided in the embodiment of the present application is now described.

[0050] Reference Figure 1 and Figure 3, the workpiece 60 to be welded has a plurality of circular welds 63, the centers of the circles of the circular welds 63 are located on the same straight line and are not arranged in concentric circles. The workpiece 60 may include a workpiece body and an interface 62, and the interface 62 needs to be welded and fixed to the workpiece body. In the embodiment of the present application, the workpiece 60 is a coffee machine heating tank, the workpiece body may be an upper cover or a lower cover, and the interface 62 needs to be welded to the upper cover or the lower cover. Correspondingly, the upper cover or the lower cover is provided with a circular hole for the interface 62 to be inserted, and the circular weld 63 is formed at the circular hole and the interface 62. There are a plurality of interfaces 62 on the workpiece 60, and correspondingly, there are also a plurality of circular welds 63, and the centers of the plurality of circular welds 63 are arranged in a straight line and the circular welds 63 are not arranged in concentric circles. These circular welds 63 may be on the same plane or not on the same plane, as long as the centers of the projections of these circular welds on the same plane are in the same straight line. It can be understood that the spacing data between the centers of these circular welds can be obtained based on design data, which is predictable, and the workpiece can be subsequently translated accordingly based on these spacing data.

[0051] The circular weld centering device provided in the embodiment of the present application includes a rotating mechanism 10, a linear translation mechanism 20, a positioning assembly 30 and a clamping mechanism 40.

[0052] Reference Figure 1 The rotating mechanism 10 may include a rotating driver 11 and a rotating table 12 driven by the rotating driver 11 to rotate around a first axis Z. The rotating table 12 can be driven to rotate by the rotating driver 11, and the structure mounted on the rotating table 12 will also rotate together. The rotating driver 11 can be fixed to the floor, and the rotating table 12 is connected to the rotating driver 11 and driven by the rotating driver 11 to rotate relative to the floor. The first axis Z can be vertical or inclined. In some embodiments of the present application, the first axis Z is vertical.

[0053] The rotary driver 11 may be a motor, and an output shaft thereof is connected to the rotary table 12 to drive the rotary table 12 to rotate.

[0054] Reference Figure 1 The linear translation mechanism 20 may include a translation driver 21 and a translation member 22 driven by the translation driver 21 to translate along a first direction X on the rotating table 12 , where the first direction X is perpendicular to the first axis Z.

[0055] Reference Figure 1, there is a plane on the rotating table 12, and the plane can be formed by installing a plate on the rotating table 12. The linear translation mechanism 20 is fixedly installed on the plane. The translation member 22 can be driven by the translation driver 21 to translate along the first direction X on the rotating table 12. It should be noted that the first direction X is relative to the rotating table 12, that is, the translation member 22 translates relative to the rotating table 12. When the rotating table 12 rotates, the translation member 22 also rotates, and still translates along the first direction X during the rotation process. The relative movement of the translation member 22 and the rotating table 12 is a linear translation. The linear translation mechanism 20 can be set horizontally or tilted. In the embodiment of the present application, the linear translation mechanism 20 is set horizontally, and the first direction X is also a straight line direction along the horizontal plane.

[0056] Reference Figure 1 The linear translation mechanism 20 may use a guide rail and a cylinder, the translation member 22 may be a slider on the guide rail, which may move linearly along the guide rail, and the cylinder is used to drive the slider to move on the guide rail. Preferably, the linear translation mechanism 20 may directly purchase a linear module on the market.

[0057] Reference Figure 1 , Figure 4 and Figure 6 The positioning assembly 30 is a component used to position the workpiece 60 to be welded on the centering device of the circular weld. The positioning assembly 30 may include a base 31 and a positioning seat 32. The base 31 is disposed on the translation member 22. The positioning seat 32 is located on the base 31 and can adjust its position along the second direction Y. The second direction Y is perpendicular to the first axis Z and is at an angle to the first direction X. The positioning seat 32 can match and position the workpiece 60 to be welded. When the workpiece 60 to be welded is positioned on the positioning assembly 30, the straight line where the centers of each circle are located is parallel to the first direction X. The translation driver 21 can drive the translation member 22 to move a distance equal to the distance between the two centers of the circle.

[0058] The positioning seat 32 may be provided with a groove matching the shape of one end of the workpiece 60 to position the workpiece 60, or a positioning pin 324 may be provided on the positioning seat 32 and a pin hole 61 matching the positioning pin 324 may be provided on the workpiece 60 to position the workpiece 60.

[0059] Reference Figure 1 and Figure 2The base 31 is fixed on the translation member 22 and can be translated along the first direction X with the translation member 22. The positioning seat 32 can cooperate with the workpiece 60 for positioning, and the workpiece 60 is installed on the positioning seat 32. After positioning, since the positioning seat 32 can adjust the position along the second direction Y on the base 31, the translation member 22 can be translated along the first direction X, that is, the positioning seat 32 and the workpiece 60 to be welded can be translated along two directions on a plane and moved to any point on the plane (within the movable range). The angle formed by the second direction Y and the first direction X can be less than or equal to 90°.

[0060] In the embodiment of the present application, the first direction X is horizontal, the second direction Y is also horizontal, and the second direction Y is perpendicular to the first direction X. By adjusting and cooperating these two directions, the center of the circular weld 63 on the workpiece 60 to be welded can be moved to the axis of the rotating table 12. The first direction X and the second direction Y are both perpendicular to the first axis Z. When the rotating table 12 rotates, the circular weld 63 will not deflect due to the rotation. The rotating circular weld 63 can be welded with a welding head, and the welding head does not need to move a small diameter circular trajectory, avoiding the deviation caused by walking a smaller circle, so that the welding difficulty is lower, the precision is higher, and the welding quality is better.

[0061] In addition, since the positioning assembly 30 is designed to position the workpiece 60 so that the straight line formed by the centers of the circles is parallel to the first direction X, it is only necessary to determine the center of any circular weld 63 and then control the linear translation mechanism 20 to move the centers of the other circles according to the specific center spacing. The moving distance is equal to the corresponding center spacing, and the center of another circular weld 63 can be moved to the first axis Z of the rotating table 12, and then the circular weld 63 can be rotated and welded. In other words, for a workpiece 60 provided with multiple circular welds 63, the centers of each circular weld 63 are located on the same straight line. By using the circular weld centering device of the embodiment of the present application, it is only necessary to locate the center of the circular weld 63 once, which greatly reduces the difficulty of determining multiple centers and is more convenient.

[0062] Reference Figure 1 The clamping mechanism 40 is disposed on the base 31 , and the clamping mechanism 40 can clamp and fix the workpiece 60 to be welded on the positioning seat 32 to prevent the workpiece to be welded from being offset during the rotation of the rotating table 12 and affecting the welding quality.

[0063] Based on the above structure, when welding a workpiece 60 to be welded having a circular weld 63, the workpiece 60 to be welded can be installed and positioned on the positioning seat 32, and then the center of the circular weld 63 can be moved to the first axis Z of the rotating table 12 by moving the positioning seat 32 on the base 31 and the translation seat 32 along the first direction X and the second direction Y, and then the workpiece 60 to be welded can be clamped and fixed by the clamping mechanism 40. Then, by starting the rotating mechanism 10, the rotating table 12 is rotated, so that the workpiece 60 rotates synchronously, and the circular weld 63 of the workpiece 60 is welded by the welding head. Since the rotation is to rotate around the axis of the center of the circular weld 63, the circular weld 63 will not be offset during the rotation, and the welding head does not need to follow a smaller circular trajectory, which greatly reduces the difficulty of welding and ensures the welding quality.

[0064] Reference Figure 4 The base 31 is provided with a slide groove 311 extending along the second direction Y, and the positioning seat 32 is slidably arranged in the slide groove 311. That is, the movement of the positioning seat 32 on the base 31 is limited by the slide groove 311, so that the positioning seat 32 can only move in a direction perpendicular to the first direction X. Specifically, the slide groove 311 can be rectangular, and after the positioning seat 32 moves to a desired position in the slide groove 311, the positioning seat 32 can be fixed by screws, jackscrews, or clamping.

[0065] Reference Figure 4 , Figure 5 and Figure 8 The positioning assembly 30 may also include an adjustment block 33 disposed at both ends of the slide slot 311 and an adjustment rod 34 passing through the adjustment block 33. One end of the adjustment rod 34 extends into the slide slot 311 and abuts against the positioning seat 32. The length of the adjustment rod 34 extending into the slide slot 311 is adjustable. The adjustment rod 34 is provided at both ends of the slide slot 311 and abuts against the positioning seat 32. When the position of the positioning seat 32 needs to be adjusted, the length of the adjustment rod 34 at one end of the slide slot 311 extending into the slide slot 311 is shortened, and the length of the other adjustment rod 34 extending into the slide slot 311 is extended. Then, the adjustment block 33 can be moved in the slide slot 311 under the push of the two adjustment rods 34, thereby playing the role of adjusting the center of the circular weld 63.

[0066] The length of the adjusting rod 34 extending into the slide slot 311 can be adjusted by the adjusting rod 34 itself being able to be telescopic (i.e., the adjusting rod 34 is a telescopic rod), or by changing the position of the adjusting rod 34 on the adjusting block 33. For example, a screw hole is provided on the adjusting block 33, and the adjusting rod 34 is provided with an external thread matching the screw hole. Through the threaded fit, the position of the positioning seat 32 can be adjusted by rotating the adjusting rod 34. Specifically, the adjusting rod 34 is a jackscrew or a screw.

[0067] Reference Figure 4 , Figure 5, Figure 8 and Fig. 9 , the positioning seat 32 may include a pad 321 that slides in match with the slide groove 311, a positioning block 322 that is detachably arranged on the pad 321, and a positioning column 323 that is detachably arranged on the positioning block 322. The pad 321 is provided with at least two positioning pins 324, and the workpiece 60 to be welded is provided with a pin hole 61 corresponding to the positioning pin 324, and the positioning column 323 is adapted to the interface 62 on the workpiece 60 to be welded. That is, in the embodiment of the present application, the positioning seat 32 is detachable, and the matching positioning block 322 and positioning column 323 can be selected according to the workpiece 60 to be welded of different specifications. Since the pad 321 is directly matched with the slide groove 311 of the base 31, the pad 321 does not need to be replaced, and only the positioning block 322 and positioning column 323 on the pad 321 need to be replaced. Specifically, the pad 321 and the positioning block 322 can be connected and fixed with screws or bolts. The pin hole 61 on the workpiece 60 is not a functional structure required by the workpiece 60 itself, and is only provided on the workpiece 60 to cooperate with the positioning pin 324. Therefore, even if a different workpiece 60 is replaced, since the pad 321 is not replaced, the pin holes 61 of the same specifications need to be provided on the workpieces 60 of different specifications. Since the specifications of the interfaces 62 on the workpieces 60 of different specifications may be different, different positioning columns 323 need to be provided according to different workpieces 60, and therefore, the positioning blocks 322 and positioning columns 323 need to be disassembled and replaced.

[0068] In some embodiments, reference Figure 6 and Figure 7 There are two types of positioning pins 324, namely the first positioning pin 3241 and the second positioning pin 3242, which correspond to the forward assembly of the workpiece on the positioning block and the reverse assembly on the positioning block respectively. Taking the workpiece as the lower cover of the coffee machine heating tank as an example, the water inlet and outlet interfaces need to be welded on the lower cover, and welding needs to be performed on both the inside and outside. 61 is set on the bottom surface of the lower cover. It is defined that the bottom surface of the lower cover is assembled at the bottom as the forward direction, and the bottom surface of the lower cover is assembled at the top as the reverse direction. The first positioning pin 3241 is used in the forward assembly (the second positioning pin 3242 needs to be removed), and the second positioning pin 3242 is used in the reverse assembly (the first positioning pin 3241 needs to be removed).

[0069] Reference Figure 6 During forward assembly, since 61 is located at the bottom of the lower cover, the first positioning pin 3241 can be set shorter to cooperate with 61 for positioning, and the inner side of the circular weld of the workpiece can be welded. Figure 7During reverse assembly, since 61 is located on the bottom surface of the lower cover and is at the top, the second positioning pin 3242 can be set longer than the first positioning pin 3241 to cooperate with 61 for positioning. At this time, the outer side of the circular weld of the workpiece can be welded. During forward and reverse assembly, the workpiece is flipped 180°, and the position of 61 is also changed. Therefore, the positions of the first positioning pin 3241 and the second positioning pin 3242 are not the same, but are symmetrical about the center of the positioning seat.

[0070] The sizes of the pad 321 and the positioning block 322 can be set according to the situation. However, since the shape of the workpiece 60 to be welded can be cylindrical, and the pad 321 is set to be rectangular in order to match the slide groove 311, a part of the cylinder exceeds the support range of the pad 321. After the clamping mechanism 40 is pressed down, the workpiece 60 to be welded may be damaged because the exceeding part has no support.

[0071] To this end, in the embodiment of the present application, the positioning assembly 30 may further include a support block 36, which is disposed on the base 31 and located on both sides of the positioning seat 32. The support block 36 has a flat support end face 361, and the workpiece 60 to be welded is supported on the support end face 361 after being positioned in cooperation with the positioning pin 324. That is, in the embodiment of the present application, the support block 36 is disposed outside the two sides of the slide groove 311 to cooperate with the positioning seat 32 to support the workpiece 60, so as to better fix the workpiece 60 on the positioning assembly 30. The support end face on the support block 36 is flat, so as to better support the workpiece 60 when the clamping mechanism 40 is pressed down.

[0072] Reference Figure 1 , Figure 5 , Fig.10 and Fig.11 The clamping mechanism 40 may include a clamping plate 41 and a connecting rod assembly 42 connected to the clamping plate 41. The connecting assembly 42 is arranged on the base 31. The connecting assembly 42 can drive the clamping plate 41 to descend above the positioning assembly 30 to clamp the workpiece 60 or to rise to loosen the workpiece 60. The clamping plate 41 is provided with an opening 411, and the circular weld 63 of the workpiece 60 to be welded is located in the opening 411. The clamping plate 41 can be driven by the connecting assembly to clamp the workpiece 60, and the workpiece 60 is clamped and fixed on the positioning assembly 30. In order not to block the welding of the circular weld 63 by the welding head, an opening 411 is provided on the clamping plate 41, and the circular weld 63 can be welded through the opening 411. Specifically, the opening 411 can be rectangular, circular, etc., and the number of the openings 411 can also be set to one or more. There are multiple circular welds 63 on the workpiece 60, and these circular welds 63 are all located in the opening 411.

[0073] Reference Fig.10 and Fig.11The connecting rod assembly 42 may include a fixed hinge 421, a pressure rod 422, a support rod 423 and a handle 424.

[0074] According to Fig.10 and Fig.11 The fixed hinge 421 may include a fixed portion 4211 disposed on the base 31 and a hinged portion 4212 vertically connected to one end of the fixed portion 4211. The fixed hinge is fixed to the base 31, and is generally L-shaped, with the lower horizontal portion of the L-shape being the fixed portion 4211, and the vertical portion of the L-shape being the hinged portion 4212. The hinged portion 4212 and the fixed portion 4211 are both provided with through holes to be hinged with other structures. Specifically, a through hole is provided at the outer end of the fixed portion 4211, and a through hole is provided at the upper end of the hinged portion 4212.

[0075] According to Fig.10 and Fig.11 The pressure rod 422 may include a pressing portion 4221 and an upper folding portion 4222 bent and connected to one end of the pressing portion 4221. The pressing plate 41 is provided at the pressing portion 4221. One end of the upper folding portion 4222 close to the pressing portion 4221 is hinged to one end of the hinged portion 4212 away from the fixed portion 4211. The pressure rod 422 is a structure connected to the pressing plate 41. The pressing plate 41 is subjected to a downward force by the pressure rod 422 so that the pressure rod 422 is pressed against the workpiece 60. The pressing portion 4221 of the pressure rod 422 may have a certain length, one end of which is connected to the pressing plate 41, and the other end is connected to the upper folding portion 4222. An obtuse angle is formed between the pressing portion 4221 and the upper folding portion 4222. Two through holes are also provided on the upper folding portion 4222 to be hinged with other structures. Specifically, a through hole is provided on the upper folding portion 4222 near the pressing portion 4221 , and a through hole is provided at the upper end of the upper folding portion 4222 .

[0076] One end of the support rod 423 is hinged to one end of the fixing portion 4211 away from the hinged portion 4212. The support rod 423 is generally strip-shaped and is hinged to the outer end of the fixing portion 4211. The support rod 423 is used to support the pressing rod 422 after compression to lock the compressed state and prevent loosening.

[0077] According to Fig.10 and Fig.11The handle 424 may include a handle 4241, a connecting portion 4242 and an upturned portion 4243 connected in sequence, wherein an angle is formed between the upturned portion 4243 and the connecting portion 4242, the upturned portion 4243 is hinged to one end of the upper folding portion 4222 away from the pressing portion 4221, and the connecting portion 4242 is hinged to the middle portion of the support rod 423. The connecting portion 4242 connects the handle 4241 and the upturned portion 4243, so that a person can apply force through the upturned portion 4243 after holding the handle 4241. A through hole is provided at the upper end of the upturned portion 4243, and a through hole is provided at one end of the connecting portion 4242 close to the upturned portion 4243, through these two through holes, the upturned portion 4243 can be hinged to the upper folding portion 4222, and the connecting portion 4242 is connected to the support rod 423.

[0078] The connecting rod assembly 42 has an open state and a clamping state. In the open state, the pressing rod 422 and the handle 4241 move upwards toward each other. In the clamping state, the pressing rod 422 and the handle 4241 move away from each other. One end of the support rod 423 away from the fixed portion 4211 is supported on the upper folding portion 4222. The state of the connecting rod assembly 42 can be changed by rotating the handle 424. When the handle 424 rotates upward, the connecting rod assembly 42 switches to the open state, the pressing rod 422 and the handle 4241 both rotate upwards toward each other, and the pressing plate 41 is lifted. When the handle 424 rotates downwards, the connecting rod assembly 42 switches to the clamping state, the pressing rod 422 and the handle 4241 both rotate downwards toward each other, and the pressing plate 41 is pressed downwards and turned into a horizontal state. At the same time, the support rod 423 supports the upper folding portion 4222, prohibiting the pressing rod 422 from continuing to press downwards, so as to avoid excessive downward force causing the workpiece 60 to be crushed.

[0079] The linear translation mechanism 20 needs to rotate with the rotation of the rotating table 12, but when the translation driver 21 is driven, cables need to be connected to power and control the translation driver 21. When the rotating table 12 rotates, these cables are easily entangled on the rotating table 12 or even broken, causing malfunctions or even short circuits and accidents.

[0080] For this purpose, refer to Figure 1 In the embodiment of the present application, the centering device of the circular weld may further include a winding frame 50 , and the winding frame 50 may include an inner frame 51 and an outer frame 52 .

[0081] The inner frame 51 may include an inner ring 511 surrounding the rotating table 12 and inner legs 512 supporting the inner ring 511. The inner frame supports the inner ring 511. It can be understood that there may be multiple inner legs 512 to jointly support the inner ring 511. The inner diameter of the inner ring 511 is larger than the maximum outer contour of the rotating table 12 after rotation, so as to prevent the rotating table 12 from colliding with the inner ring 511 when rotating.

[0082] Reference Figure 1The outer frame 52 may include an outer ring 521 surrounding the inner ring 511 and outer legs 522 supporting the outer ring 521, with a gap between the outer ring 521 and the inner ring 511. The inner diameter of the outer ring 521 is greater than the outer diameter of the inner ring 511, so that a gap is formed between the two. There may also be multiple outer legs 522, which jointly support the outer ring 521.

[0083] Among them, the cable of the linear translation mechanism 20 is in the interval and coiled on the inner frame 51, so that the linear translation mechanism 20 can rotate at least 180° with the rotating table 12. The cable is spirally wound, and the rotating table 12 has an initial point. When welding, the rotating table 12 can first rotate 180° in one direction (for example, clockwise), and weld the circular weld 63 while rotating. Then, the rotating table 12 can rotate in the opposite direction (counterclockwise) back to the initial point, and then continue to rotate 180°, and weld during the rotation. In other words, the forward and reverse rotation here is the forward and reverse rotation starting from the initial point. By setting the winding frame 50, the linear translation mechanism 20 can work normally without causing the cable to be completely wound in one direction and become tight or even broken.

[0084] The embodiment of the present application also provides a welding device, which may include a centering device for a circular weld as described above, and may also include a welding mechanism, which may include a welding head that can weld a workpiece 60 on the positioning assembly 30.

[0085] The welding device of the embodiment of the present application includes the circular weld centering device in any of the above embodiments, and thus has the beneficial effects brought by the circular weld centering device in any of the above embodiments, which will not be elaborated here.

[0086] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A centering device for a circular weld, wherein a workpiece has a plurality of circular welds, the centers of the circular welds are located on the same straight line and are non-concentrically arranged, characterized in that: The centering device of the circular weld comprises: A rotating mechanism, comprising a rotating drive and a rotating table driven by the rotating drive to rotate about a first axis; A linear translation mechanism, comprising a translation driver and a translation member driven by the translation driver to translate along a first direction on the rotating table, wherein the first direction is perpendicular to the first axis; A positioning assembly, comprising a base and a positioning seat, wherein the base is disposed on the translation member, the positioning seat is located on the base and can adjust its position along a second direction, the second direction is perpendicular to the first axis and forms an angle with the first direction, the positioning seat can match and position the workpiece to be welded, when the workpiece to be welded is positioned on the positioning assembly, the straight line where the center of each circle is located is parallel to the first direction, and the translation driver can also drive the translation member to move a specified distance; and The clamping mechanism is arranged on the base, and the clamping mechanism can clamp and fix the workpiece to be welded on the positioning seat.

2. The centering device for a circular weld according to claim 1, characterized in that: The base is provided with a slide groove extending along the second direction, and the positioning seat is slidably arranged in the slide groove in a matching manner.

3. The centering device for a circular weld according to claim 2, characterized in that: The positioning assembly also includes adjustment blocks arranged at both ends of the slide slot and an adjustment rod passing through the adjustment block. One end of the adjustment rod extends into the slide slot and abuts against the positioning seat. The length of the adjustment rod extending into the slide slot is adjustable.

4. The centering device for a circular weld according to claim 2, characterized in that: The positioning seat includes a pad block that slides in matching fashion with the slide groove, a positioning block detachably mounted on the pad block, and a positioning column detachably mounted on the positioning block. The pad block is provided with at least two positioning pins, the workpiece to be welded is provided with pin holes corresponding to the positioning pins, and the positioning column is adapted to an interface on the workpiece to be welded.

5. The centering device for a circular weld according to claim 4, characterized in that: The positioning assembly also includes a support block, which is arranged on the base and located on both sides of the positioning seat. The support block has a flat support end surface, and the workpiece to be welded is supported on the support end surface after being positioned in cooperation with the positioning pin.

6. The centering device for a circular weld according to claim 1, characterized in that: The clamping mechanism includes a pressing plate and a connecting rod assembly connected to the pressing plate, the connecting assembly is arranged on the base, the pressing plate can drive the pressing plate to descend above the positioning assembly to clamp the workpiece or to rise to loosen the workpiece, the pressing plate is provided with an opening, and the circular weld of the workpiece to be welded is located in the opening.

7. The centering device for a circular weld according to claim 6, characterized in that: The connecting rod assembly comprises: A fixed hinge frame, comprising a fixed portion arranged on the base and a hinge support portion vertically connected to one end of the fixed portion; The pressure rod comprises a pressing part and an upper folding part bent and connected to one end of the pressing part, the pressing plate is arranged on the pressing part, and one end of the upper folding part close to the pressing part is hinged to one end of the hinge part away from the fixing part; A support rod, one end of which is hinged to an end of the fixing portion away from the hinged branch; A handle, comprising a handle, a connecting portion and an upturned portion connected in sequence, wherein an angle is formed between the upturned portion and the connecting portion, the upturned portion is hinged to an end of the upturned portion away from the pressing portion, and the connecting portion is hinged to the middle portion of the support rod; Wherein, the connecting rod assembly has an open state and a clamped state. In the open state, the pressure rod and the handle move upward toward each other, and in the clamped state, the pressure rod and the handle move away from each other, and one end of the support rod away from the fixed part is supported on the upper folding part.

8. The centering device for a circular weld according to claim 1, characterized in that: Also included is a winding rack, the winding rack comprising: An inner frame, comprising an inner ring surrounding the rotating table and inner legs supporting the inner ring; An outer frame, comprising an outer ring surrounding the inner ring and outer legs supporting the outer ring, with a gap between the outer ring and the inner ring; The cable of the linear translation mechanism is in the interval and coiled on the inner frame, so that the linear translation mechanism can rotate forward and reverse by at least 180° along with the rotating table.

9. A welding device, characterized in that: A centering device for a circular weld according to any one of claims 1 to 8, further comprising a welding mechanism, wherein the welding mechanism comprises a welding head capable of welding the workpiece on the positioning assembly.

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