Efficient welding equipment for metal egg beating bar production

Abstract

The invention relates to the technical field of electric arc welding, in particular to efficient welding equipment for metal egg beating bar production, which comprises a positioning clamp, the positioning clamp is mounted on a rotary driving assembly, and the positioning clamp comprises an upper fixing ring, a lower fixing ring and a plurality of supporting cylinders connected with the upper fixing ring and the lower fixing ring; telescopic rings are arranged in the upper fixing ring and the lower fixing ring, and a plurality of multi-stage telescopic sleeves are annularly distributed on the outer side of each telescopic ring. The positioning clamp adopts two telescopic rings which are coaxially arranged up and down, each telescopic ring is composed of a plurality of arc-shaped shells, and the lower surface of the inner wall of each arc-shaped shell is provided with a positioning notch matched with the outline of the U-shaped iron wire. When the air pump drives the multi-stage telescopic sleeve to enable the telescopic ring to synchronously contract, each U-shaped iron wire of the stirring head can be accurately guided and clamped into the corresponding notch, and direct and accurate radial positioning and clamping of the folded part of the stirring head are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric arc welding, and particularly relates to a high-efficiency welding device for metal whisk production. BACKGROUND

[0002] In the production and manufacturing process of metal whisk, a flower-bone-shaped stirring head composed of multiple metal wires is folded and interlaced, and needs to be folded and fixed through the annular cavity at the end of the rod. At present, the conventional welding device in this field mostly adopts electric arc welding process. Specifically, the assembled whisk rod part is clamped and positioned by a clamp, then a welding gun is aimed at the contact point between the annular cavity of the rod and the internal metal wire for welding, and the local metal is melted by arc heat to form a welding point, so that the stirring head and the rod are fixed as a whole. This clamping and positioning method based on the rod is a common solution in the prior art.

[0003] However, the above-mentioned existing welding method has a significant defect in actual production, especially when dealing with the flower-bone-shaped stirring head. Before welding, the stirring head is only preliminarily positioned by the insertion fit between its folded end and the annular cavity of the rod, and there is a lack of firm pre-fixing between the two. When only the rod is clamped and the stirring head is in a free state, the stirring head is prone to loosen, rotate or displace in the insertion depth in the rod cavity under the disturbance of the equipment transfer. The direct consequence of this problem is that the preset welding point position deviates seriously, which not only leads to unstable welding quality and low yield, but also causes irreversible pulling and deflection deformation of the precisely arranged flower-bone-shaped structure due to the combined action of thermal stress and inaccurate positioning during welding, thereby affecting the appearance and use performance of the product. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is that the prior art only clamps the rod for welding, which will cause the stirring head to displace and deform during welding.

[0005] The above technical problem is solved by the following technical scheme. The present application provides a high-efficiency welding device for metal whisk production, which comprises a rotary driving assembly; a positioning clamp installed on the rotary driving assembly, the positioning clamp comprising an upper fixed ring, a lower fixed ring, and multiple support cylinders connecting the upper fixed ring and the lower fixed ring, each of the upper fixed ring and the lower fixed ring being provided with an expansion ring inside, multiple multi-stage expansion sleeves being annularly distributed on the outer side of each expansion ring, one end of each multi-stage expansion sleeve being hinged to the outer wall of the fixed ring, and the other end being hinged to the outer wall of the expansion ring, the interiors of the upper fixed ring, the lower fixed ring and the support cylinders constituting a communicating cavity; a gas pump being in communication with the cavity; and a welding execution assembly comprising a welding gun and an adjusting mechanism for adjusting the position and angle of the welding gun.

[0006] In a preferred embodiment of the high-efficiency welding device for metal whisk production, the telescopic ring comprises a plurality of arc-shaped shells arranged at equal intervals in a ring shape, and the number of the arc-shaped shells is in a fixed proportional relationship with the number of the iron wires in the whisk stirrer to be welded.

[0007] In a preferred embodiment of the high-efficiency welding device for metal whisk production, a notch is formed at the midpoint of the lower surface of the inner wall of each arc-shaped shell, and the shape of the notch matches the profile of the single-sided iron wire after U-shaped bending.

[0008] In a preferred embodiment of the high-efficiency welding device for metal whisk production, the telescopic ring is composed of a plurality of arc-shaped shells, and a plurality of arc-shaped pieces are sequentially arranged in each arc-shaped shell from top to bottom. The arc-shaped pieces and the arc-shaped shells, and the upper and lower adjacent arc-shaped pieces are connected by sliding members, so that the arc-shaped pieces can be telescoped relative to the arc-shaped shells.

[0009] In a preferred embodiment of the high-efficiency welding device for metal whisk production, the sliding member comprises a first sliding block arranged on the lower surface of the rear end of the upper arc-shaped piece, a second sliding block arranged on the upper surface of the front end of the lower arc-shaped piece, and an arc-shaped sliding groove arranged on the upper and lower surfaces of the arc-shaped piece. A slidable horizontal plate and a spring for resetting the horizontal plate are arranged in the arc-shaped sliding groove. A limiting groove is formed on the horizontal plate. The first sliding block of the rear end of the upper arc-shaped piece is embedded in the arc-shaped sliding groove of the lower arc-shaped piece and slides in the limiting groove of the horizontal plate. The second sliding block of the front end of the lower arc-shaped piece is embedded in the arc-shaped sliding groove of the upper arc-shaped piece and slides in the limiting groove of the horizontal plate.

[0010] In a preferred embodiment of the high-efficiency welding device for metal whisk production, the cross-sectional width of the cavity of the arc-shaped shell is greater than the cross-sectional width of the arc-shaped piece. The horizontal plate is arranged perpendicular to the arc-shaped sliding groove, and the limiting groove is arranged along the length direction of the horizontal plate.

[0011] In a preferred embodiment of the high-efficiency welding device for metal whisk production, the number of the multi-stage telescopic sleeves is four, which are divided into two groups corresponding to the upper fixed ring and the lower fixed ring, respectively, and each group is symmetrically distributed with the center of the telescopic ring as the center.

[0012] In a preferred embodiment of the high-efficiency welding device for metal whisk production, it further comprises a base, a box arranged on the base, a support frame arranged in the box above the base, a turntable rotatably arranged above the support frame through a bearing, and the positioning clamp is arranged on the turntable.

[0013] In a preferred embodiment of the high-efficiency welding device for metal beater production according to the present application: the rotary drive assembly comprises a motor, a driving wheel connected with the output shaft of the motor, a driven wheel connected with the input shaft of the rotary table, and a belt sleeved on the driving wheel and the driven wheel.

[0014] In a preferred embodiment of the high-efficiency welding device for metal beater production according to the present application: the adjusting mechanism comprises a telescopic rod and an angle adjusting seat arranged at the top end of the telescopic rod, the angle adjusting seat is fixedly connected with the welding gun, and the welding gun is an electric arc welding gun.

[0015] The positioning clamp of the present application adopts two telescopic rings arranged coaxially, the telescopic rings are composed of a plurality of arc shells, and the inner wall lower surface of each arc shell is provided with a positioning notch matched with the contour of the U-shaped wire. When the multi-stage telescopic sleeve driven by the air pump synchronously shrinks the telescopic rings, each U-shaped wire of the stirring head can be accurately guided and clamped into the corresponding notch, realizing direct and accurate radial positioning and clamping of the folded part of the stirring head. At the same time, the cooperation of the upper and lower telescopic rings, like the upper and lower clamps, firmly locks the relative position of the stirring head and the rod body insertion part, effectively inhibits the displacement of the stirring head due to its elastic deformation tendency, thereby providing an extremely stable basis for subsequent welding, ensuring the accuracy of the welding point and the integrity of the product shape.

[0016] Through the synergistic effect of the arc shell, the multi-layer arc-shaped piece and the sliding member (including the sliding block, the cross plate, the spring and the limiting groove) arranged therebetween, the telescopic ring can realize stable, smooth and orderly telescopic deformation within a relatively large diameter range controlled by the air pump. The sliding member not only provides the necessary degree of freedom for motion to adapt to the change of curvature, but also ensures that the telescopic ring can maintain a stable and approximately circular structure profile at any diameter, avoiding the risk of jamming, loosening or out-of-round. This self-adaptive capability enables the device to be compatible with different specifications of products within a certain size range, enhancing the versatility and practicality of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, but not limit the present application. Among them: Figure 1 It is an external structure schematic diagram of the present application; Figure 2 It is an internal three-dimensional structure schematic diagram of the present application; Figure 3 It is an internal side view structure schematic diagram of the present application; Figure 4 Fig. 1 is a perspective view of a positioning clamp according to the present application; Figure 5 Fig. 2 is a sectional view of the positioning clamp according to the present application; Figure 6 Fig. 3 is a perspective view of an extension ring according to the present application; Figure 7 Fig. 4 is a view of a connecting structure between two adjacent arc-shaped pieces according to the present application.

[0018] In the drawings: 1. rotation driving assembly; 11. turntable; 12. motor; 13. belt; 2. positioning clamp; 21. upper fixed ring; 22. lower fixed ring; 23. support cylinder; 24. extension ring; 241. arc-shaped shell; 2411. notch; 242. arc-shaped piece; 2421. arc-shaped sliding groove; 2422. transverse plate; 2423. spring; 2424. limiting groove; 243. first sliding block; 244. second sliding block; 25. multi-stage extension sleeve; 26. cavity; 3. welding execution assembly; 31. welding gun; 32. adjusting mechanism; 321. extension rod; 322. angle adjusting seat; 4. air pump; 5. base; 6. box; 7. support frame. DETAILED DESCRIPTION

[0019] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to specific embodiments and drawings.

[0020] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions about the present application, but these terms can be changed according to the intention of those skilled in the art, precedents, or new technology in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meaning of the terms and the overall description of the present application.

[0021] Reference Figures 1-7The embodiment provides a high-efficiency welding device for metal egg whisk production, which comprises a rotating driving assembly 1; a positioning clamp 2 installed on the rotating driving assembly 1, wherein the positioning clamp 2 comprises an upper fixed ring 21, a lower fixed ring 22 and a plurality of support cylinders 23 connecting the upper fixed ring 21 and the lower fixed ring 22, a telescopic ring 24 is arranged in each of the upper fixed ring 21 and the lower fixed ring 22, a plurality of multistage telescopic sleeves 25 are annularly arranged on the outer side of each telescopic ring 24, one end of the multistage telescopic sleeve 25 is hinged to the outer wall of the fixed ring, the other end is hinged to the outer wall of the telescopic ring 24, the interiors of the upper fixed ring 21, the lower fixed ring 22 and the support cylinders 23 form a cavity 26 in communication; a gas pump 4 is in communication with the cavity 26; a welding execution assembly 3 comprising a welding gun 31 and an adjusting mechanism 32 for adjusting the position and angle of the welding gun 31.

[0022] The rotating driving assembly 1 of the application provides a circumferential feeding motion for the workpiece to be welded. The positioning clamp 2 installed thereon adopts a concentric fixed ring structure, is connected into a stable frame through the support cylinders 23, and is provided with a set of radially telescopic annular clamping mechanisms, i.e., the telescopic rings 24, in the frame. The telescopic ring 24 is not formed by a rigid whole, but is driven by being hinged to the outer walls of the upper and lower fixed rings through the multistage telescopic sleeves 25 annularly distributed on the outer side. The cavity 26 formed by penetrating the interiors of the upper and lower fixed rings and the connecting support cylinders 23 forms a unified gas supply network, the network is connected with an external gas pump 4, and finally extends to each multistage telescopic sleeve 25, which enables the device to synchronously and accurately control the coordinated action of all the multistage telescopic sleeves 25 by controlling a single gas source, and further realize flexible and stable control of the diameter of the telescopic ring 24, so as to adapt to workpieces of different specifications and complete firm clamping. In order to complete the final welding operation, the device is provided with the welding execution assembly 3, which integrates the welding gun 31 as a terminal executor and an adjusting mechanism 32 capable of adjusting the spatial position and angle of the welding gun 31 in multiple degrees of freedom, which enables the welding gun 31 to be accurately aimed at each preset welding point of the workpiece fixed by the positioning clamp 2.

[0023] In summary, the embodiment integrates the rotating driving, pneumatic self-adaptive clamping and adjustable welding three major functional modules, and constitutes a complete solution. The device can effectively overcome the welding quality defects caused by unstable clamping in the prior art, and realize efficient and high-quality automatic welding of the metal egg whisk, especially the complex stirring head part.

[0024] The base 5 is the installation base of the whole device, and the box 6 is arranged on the base 5, the core working components are contained in the box 6, and the box 6 plays a role of safety protection and structural support. The support frame 7 is fixedly installed above the base 5 in the box 6, and the support frame 7 provides a high-rigidity installation platform for the rotating part. The rotary table 11 is rotatably arranged above the support frame 7 through a bearing, the application of the bearing ensures that the rotary table 11 can realize stable and low-friction rotary motion relative to the support frame 7, and the positioning clamp 2 is directly fixedly installed on the upper surface of the rotary table 11, so that the positioning clamp 2 can rotate with the rotary table 11, and the change of the circumferential welding position of the workpiece is realized.

[0025] The base 5 is the installation base of the whole device, and the box 6 is arranged on the base 5, the core working components are contained in the box 6, and the box 6 plays a role of safety protection and structural support. The support frame 7 is fixedly installed above the base 5 in the box 6, and the support frame 7 provides a high-rigidity installation platform for the rotating part. The rotary table 11 is rotatably arranged above the support frame 7 through a bearing, the application of the bearing ensures that the rotary table 11 can realize stable and low-friction rotary motion relative to the support frame 7, and the positioning clamp 2 is directly fixedly installed on the upper surface of the rotary table 11, so that the positioning clamp 2 can rotate with the rotary table 11, and the change of the circumferential welding position of the workpiece is realized.

[0026] The rotary driving assembly 1 for driving the rotary table 11 to rotate specifically includes a motor 12, a driving wheel, a driven wheel and a belt 13, wherein the motor 12 is used as a power source and is preferably installed below the support frame 7 to optimize the space layout, the driving wheel is installed on the output shaft of the motor 12, the driven wheel is installed on the input shaft of the rotary table 11, and the closed belt 13 is tightly sleeved on the driving wheel and the driven wheel, so that the power of the motor 12 is reliably transmitted to the rotary table 11 to drive the rotary table 11 to perform accurate rotary motion. The belt 13 transmission mode has the characteristics of buffering, vibration absorption and stable transmission.

[0027] The welding execution assembly 3 for performing the welding operation is composed of a telescopic rod 321 and an angle adjusting seat 322, wherein the telescopic rod 321 is vertically installed on the base 5 in the box 6, and the angle adjusting seat 322 is arranged at the top end of the telescopic rod 321. The angle adjusting seat 322 is a mechanical structure capable of multi-angle adjustment, and the arc welding gun 31 is finally fixedly installed on the angle adjusting seat 322. The working height of the welding gun 31 can be macroscopically adjusted through the lifting of the telescopic rod 321, and the end of the welding gun 31 can be accurately aligned with the welding point through the fine adjustment of the angle adjusting seat 322, so as to adapt to different welding position requirements and ensure the welding quality.

[0028] Further, the telescopic ring 24 is composed of a plurality of arc-shaped shells 241, and a plurality of arc-shaped pieces 242 are sequentially arranged from top to bottom in each arc-shaped shell 241. The arc-shaped pieces 242 and the arc-shaped shells 241, and the upper and lower adjacent arc-shaped pieces 242 are connected by sliding members, so that the arc-shaped pieces 242 can be telescoped relative to the arc-shaped shells 241.

[0029] The telescopic ring 24 is not a complete rigid ring body, but is composed of a plurality of independent arc-shaped shells 241 arranged in a ring shape. Each arc-shaped shell 241 itself serves as a basic support unit, and a set of telescopic arc-shaped pieces 242 are arranged in the internal cavity 26 of each arc-shaped shell 241. A plurality of arc-shaped pieces 242 are sequentially arranged from top to bottom in the internal cavity 26 of each arc-shaped shell 241. The arc-shaped pieces 242 have the same radius of curvature, so that they can be arranged together in parallel. The uppermost arc-shaped piece 242 is connected to the inner wall of the arc-shaped shell 241 by a sliding member. Similarly, the upper and lower adjacent arc-shaped pieces 242 are connected to each other by the same sliding members. The cooperation of the series of sliding members enables the plurality of arc-shaped pieces 242 to perform radial telescopic movement relative to the arc-shaped shells 241. When subjected to an external driving force, the uppermost arc-shaped piece 242 first slides out of the arc-shaped shell 241, and then sequentially drives the next layer of arc-shaped pieces 242 to extend, like a step, to ensure that the telescopic ring 24 can smoothly and synchronously expand from a compact, small-diameter closed ring body to a large-diameter support ring body, thereby realizing the function of self-adaptive clamping of workpieces of different specifications. The telescopic process is smooth and stable, and there is no interference between the components, ensuring the reliability and service life of the equipment.

[0030] The telescopic ring 24 includes a plurality of arc-shaped shells 241 arranged in a ring shape at equal intervals. The number of arc-shaped shells 241 is in a fixed proportional relationship with the number of iron wires in the egg whisk stirrer to be welded. A notch 2411 is formed at the midpoint of the lower surface of the inner wall of each arc-shaped shell 241. The shape of the notch 2411 matches the profile of the single-sided iron wire after U-shaped bending.

[0031] The telescopic ring 24 is specially designed to achieve precise positioning and stable clamping of the flower bud-shaped stirrer. The telescopic ring 24 is composed of a plurality of arc-shaped shells 241 arranged in a ring shape at equal intervals, forming a ring structure with a dynamically adjustable diameter. The number of arc-shaped shells 241 is in a fixed proportional relationship with the number of iron wires in the egg whisk stirrer to be welded. This proportional relationship always needs to ensure that each U-shaped iron wire can be received and guided by an independent arc-shaped shell 241 during the telescopic ring 24 contraction process, thereby ensuring uniform distribution of clamping force and positioning accuracy from a structural point of view.

[0032] Further, a notch 2411 is machined at the midpoint of the inner wall lower surface of each arc shell 241. The profile of the notch 2411 is not simply a groove, but strictly matches the outer profile of the single-sided wire after U-shaped bending. When the multiple wires of the stirring head are gathered inward as the contraction of the telescopic ring 24, each wire will naturally slide into the corresponding notch 2411 guided by the inner wall of the arc shell 241. The notch 2411 plays a key role in radial positioning, effectively preventing the wire from slipping circumferentially or axially during clamping and subsequent welding rotation, thereby firmly constraining the entire flower-shaped stirring head in the pre-set ideal position, laying a solid foundation for subsequent high-quality welding.

[0033] The number of multi-stage telescopic sleeves 25 is four, which are divided into two groups corresponding to the upper fixed ring 21 and the lower fixed ring 22, and each group is symmetrically distributed with the center of the telescopic ring 24 as the center.

[0034] The total number of multi-stage telescopic sleeves 25 is four, which are arranged in two groups. Two multi-stage telescopic sleeves 25 in each group act on the telescopic ring 24 in the upper fixed ring 21, and the other two multi-stage telescopic sleeves 25 in the other group act on the telescopic ring 24 in the lower fixed ring 22. The two multi-stage telescopic sleeves 25 in each group are symmetrically distributed at 180 degrees with the theoretical center of the telescopic ring 24 as the center point. This strict symmetrical layout means that the driving force for the contraction of the telescopic ring 24 always comes from two completely opposite directions. When the air pump 4 supplies compressed gas, the gas enters the symmetrically distributed multi-stage telescopic sleeves 25 through the cavity 26 in the fixed ring, pushing them to extend step by step synchronously and equally. This symmetrical driving mechanism fundamentally avoids the telescopic ring 24 from being stuck or skewed during contraction due to unbalanced driving force, and it ensures that the multiple arc shells 241 around the whisk stirring head can uniformly contract towards the center symmetrically and stably, thereby forming a stable and precise centripetal clamping force on the workpiece, providing crucial positioning protection for subsequent high-quality welding.

[0035] The working process of the multi-stage telescopic sleeve 25 of the present application is as follows: when the air pump 4 starts and supplies gas to the cavity 26 inside the fixed ring, the compressed gas is simultaneously and equally delivered to the bottom cavities of the four symmetrically arranged multi-stage telescopic sleeves 25 through the cavity 26 and its connecting pipeline. The gas pressure first acts on the bottom surface of the piston of the largest stage (outermost layer) cylinder, pushing it to extend first; when the stroke of this stage cylinder reaches the end point, the internal pressure acts on the next stage cylinder, making it extend next, and so on, until all the sleeves reach the maximum stroke. The extension movement of the sleeve is converted into the driving force for the inward contraction of the telescopic ring 24 through the hinge point of its end with the outer wall of the telescopic ring 24.

[0036] In the design of the telescopic ring 24, its core function is to achieve smooth switching between the large and small diameters of the ring body. If only relying on multiple independent arc-shaped shells 241 connected end to end, the spacing between adjacent arc-shaped shells 241 will change significantly when the diameter changes, and simply relying on rigid connection cannot achieve a continuous and stable ring profile. To overcome this problem, a series of arc-shaped pieces 242 arranged in an upper and lower row and connected end to end are provided between each adjacent arc-shaped shell 241 to dynamically connect the arc-shaped shells 241. However, this design faces a key geometric contradiction: the telescopic ring 24 has different curvatures at different diameters, which means that the curvature of the connecting unit also needs to change accordingly. If the arc-shaped shells 241 are designed too long, when contracted to a small diameter, adjacent shells will interfere due to the mismatch between their own curvature and the target curvature, and cannot be tightly contracted. Conversely, if the arc-shaped shells 241 are too short, when expanded to a large diameter, the spacing between adjacent shells will be too large, causing the arc-shaped pieces 242 connecting them to stretch excessively, losing effective support and guidance, and causing the ring body structure to become loose. Therefore, all arc-shaped pieces 242 are designed to be storable inside the arc-shaped shells 241, with their curvature consistent with that of the arc-shaped shells 241 to ensure structural uniformity in the contracted state. However, during diameter conversion, the ring body structure has the risk of "splitting" at the connection due to sudden curvature changes, i.e., mechanical jamming or uncontrolled deformation.

[0037] To solve this problem and accurately control the motion trajectory of each movable component, specific sliding members are provided between the arc-shaped pieces 242 and the arc-shaped shells 241, as well as between adjacent arc-shaped pieces 242. The role of these sliding members is to provide limited and constrained degrees of freedom for each arc-shaped piece 242 during diameter switching, allowing for fine adjustment of the connection angle, thereby effectively absorbing and resolving internal stress caused by changes in curvature and avoiding structural splitting. Crucially, this allowed angle adjustment is strictly constrained, with the degrees of freedom designed to only compensate for necessary deformation. If the degrees of freedom are too large, the ring body will not be able to maintain an approximately circular stable profile when expanded to a large diameter, resulting in ring body out-of-roundness, uneven clamping force, and thus inability to ensure the smoothness and reliability of the telescopic ring 24 during the entire working cycle of expansion and contraction.

[0038] The arrangement of the sliding member is the key point to achieve smooth deformation and structural rigidity of the telescopic ring 24 under a large range of diameter changes. Specifically, the sliding member includes a first sliding block 243 arranged on the lower surface of the rear end of the upper arc-shaped sheet 242, a second sliding block 244 arranged on the upper surface of the front end of the lower arc-shaped sheet 242, and an arc-shaped sliding groove 2421 arranged on the upper and lower surfaces of the arc-shaped sheet 242, wherein the arc-shaped sliding groove 2421 is internally provided with a slidable horizontal plate 2422 and a spring 2423 for resetting the horizontal plate 2422, and the horizontal plate 2422 is provided with a limiting groove 2424, the first sliding block 243 of the rear end of the upper arc-shaped sheet 242 is embedded in the arc-shaped sliding groove 2421 of the lower arc-shaped sheet 242 and slides in the limiting groove 2424 of the horizontal plate 2422, and the second sliding block 244 of the front end of the lower arc-shaped sheet 242 is embedded in the arc-shaped sliding groove 2421 of the upper arc-shaped sheet 242 and slides in the limiting groove 2424 of the horizontal plate 2422.

[0039] The sliding member is mainly composed of the following parts: an arc-shaped sliding groove is machined on the upper and lower surfaces of each arc-shaped sheet 242. A first sliding block 243 is fixedly arranged on the lower surface of the rear end of the upper arc-shaped sheet 242, and a second sliding block 244 is correspondingly fixedly arranged on the upper surface of the front end of the lower arc-shaped sheet 242. A horizontal plate 2422 that can slide along the groove is installed in each arc-shaped sliding groove 2421, the horizontal plate 2422 is maintained at one end of the arc-shaped sliding groove 2421 under the action of the pre-tightening force of the resetting spring 2423, and the horizontal plate 2422 is provided with a limiting groove 2424 specially used for guiding and limiting.

[0040] The connection relationship is as follows: the first sliding block 243 of the rear end of the upper arc-shaped sheet 242 is downwardly embedded and limited in the arc-shaped sliding groove 2421 of the upper surface of the adjacent lower arc-shaped sheet 242 and slides in the limiting groove 2424 of the horizontal plate 2422 of the arc-shaped sliding groove 2421. Similarly, the second sliding block 244 of the front end of the lower arc-shaped sheet 242 is upwardly embedded and limited in the arc-shaped sliding groove 2421 of the lower surface of the adjacent upper arc-shaped sheet 242 and slides in the limiting groove 2424 of the horizontal plate 2422. This cross-locked “you have me, and I have you” design constitutes a firm and flexible mechanism, avoiding excessive freedom degree formed by single-point embedding.

[0041] The following takes the complete working cycle of the telescopic ring 24 as an example to illustrate the movement process in detail. 1. Expansion process (change from a small-diameter ring body to a large-diameter ring body): when the external driving force (such as the contraction of the multi-stage telescopic sleeve 25) pulls the adjacent two arc-shaped shells 241 away from each other, the entire set of arc-shaped sheets 242 connected between the two arc-shaped shells 241 begins to be pulled out.

[0042] The first stage: in the initial state, all the arc-shaped pieces 242 are completely nested in the arc-shaped shells 241, and as the arc-shaped shells 241 are separated, the uppermost arc-shaped piece 242 directly hinged to the arc-shaped shell 241 is first pulled, because it is fixed at the front end in the expansion direction to the side of the adjacent arc-shaped shell 241, so it starts to slide out of the arc-shaped shell 241 in which it is nested, its movement pulls the cross plate 2422 in the next layer of arc-shaped piece 242 in the arc-shaped sliding groove 2421 through the first slider 243 on its lower surface, and the bending degree of freedom is realized by sliding the first slider 243 in the limiting groove 2424, at this time the cross plate 2422 is compressed against the spring 2423, and also stably slides along the arc-shaped sliding groove 2421 under the action of the spring 2423. At the same time, the next layer of arc-shaped piece 242 pulls the cross plate 2422 in the upper layer of arc-shaped piece 242 in the arc-shaped sliding groove 2421 through the second slider 244 on its upper surface, and the bending degree of freedom is realized by sliding the second slider 244 in the limiting groove 2424, at this time the cross plate 2422 is compressed against the spring 2423, and also stably slides along the arc-shaped sliding groove 2421 under the action of the spring 2423. The extension of an arc-shaped piece 242 requires the cooperation of the first slider 243 and the second slider 244.

[0043] The second stage: when the uppermost arc-shaped piece 242 is completely pulled out to the end of its stroke, that is, the first slider 243 moves the cross plate 2422 to the end of the arc-shaped sliding groove 2421 of the lower layer of arc-shaped piece 242, and the second slider 244 moves the cross plate 2422 to the end of the arc-shaped sliding groove 2421 of the upper layer of arc-shaped piece 242, at this time the first slider 243 of the upper layer of arc-shaped piece 242 is close to the second slider 244 of the lower layer of arc-shaped piece 242, because the upper layer of arc-shaped piece 242 is completely unfolded and cannot be extended, it starts to drive the adjacent arc-shaped piece 242 below through the first slider 243 on its lower surface and the second slider 244 of the lower layer of arc-shaped piece 242, the first slider 243 of the lower layer of arc-shaped piece 242 pulls the cross plate 2422 in the arc-shaped sliding groove 2421 of the lower layer of arc-shaped piece 242, and this force overcomes the pre-tightening force of the return spring 2423, so that the cross plate 2422 slides in the arc-shaped sliding groove 2421, thereby transmitting the movement and starting to pull the second layer of arc-shaped piece 242 out of the arc-shaped shell 241 in which it is located.

[0044] Step-by-step transmission: this process is transmitted downward in turn. Each layer of arc-shaped piece 242 must start its own extension movement after the upper layer of arc-shaped piece 242 reaches the maximum stroke, and this "relay" type linkage mechanism ensures the continuity and synchronization of the ring structure during the entire expansion process, all connection parts are always in a controlled state, smoothly forming a complete ring surface with a larger diameter and uniform curvature, effectively avoiding loose or jamming structure caused by disordered unfolding.

[0045] 2. Contraction process (transition from large diameter ring to small diameter ring): Contraction is the reverse process of expansion, which occurs when the adjacent arc shells 241 are pushed closer to each other by external driving force (such as the elongation of the multi-stage telescopic sleeve 25).

[0046] First stage: The contraction force first acts on the outermost arc shell 241, and the uppermost arc piece 242 hinged to the arc shell 241 is first pushed back into the arc shell 241 it belongs to.

[0047] Second stage: As the uppermost arc piece 242 retracts, its restraining force on the next layer of arc pieces 242 gradually releases, and under the action of the reset spring 2423, the horizontal plate 2422 in the upper arc sliding groove 2421 of each layer of arc pieces 242 begins to reset. This reset action also self-adapts the positions of the first slider 243 and the second slider 244 in the horizontal plate 2422 limiting groove 2424, achieving self-adaptive adjustment of degrees of freedom and orderly guiding the second layer, third layer, and finally the bottom layer of arc pieces 242 to slide back into their respective accommodation spaces.

[0048] Sequential nesting: The entire contraction process also follows strict sequentiality, and the lower arc piece 242 must begin to retract only after the upper arc piece 242 has completely or partially retracted and vacated the space. This design ensures that all arc pieces 242 can be smoothly and interference-free fully accommodated inside the arc shell 241, ultimately forming a compact and smallest-diameter rigid ring.

[0049] In summary, the slider, through its unique cross-interlocking with the horizontal plate 2422 and spring 2423 limiting mechanism, cleverly decomposes a large diameter change into multiple orderly and controllable small stroke movements, thereby achieving smooth, reliable, and synchronous movement of the telescopic ring 24 during a dramatic change in diameter, and fundamentally solving the problem of structural instability caused by sudden curvature changes.

[0050] In some embodiments, the cavity cross-sectional width of the arc shell 241 is greater than the cross-sectional width of the arc piece 242, the horizontal plate 2422 is arranged perpendicular to the arc sliding groove 2421, and the limiting groove 2424 is arranged along the length direction of the horizontal plate 2422.

[0051] First, the cross-sectional width of the cavity inside the arc shell 241 is intentionally designed to be larger than the cross-sectional width of the arc piece 242 it contains. This size difference provides the necessary radial movement allowance for the telescopic movement of the arc piece 242 in the shell, which can effectively absorb and accommodate the small lateral deformation or assembly stress caused by changes in curvature during the expansion or contraction of the ring, avoiding hard contact or jamming between the arc piece 242 and the inner wall of the arc shell 241, and ensuring smooth movement.

[0052] Secondly, the horizontal plate 2422 is arranged perpendicular to the groove direction of the arc-shaped sliding groove 2421 in which it is located. This perpendicular arrangement allows the two ends of the horizontal plate 2422 to stably sit in the track of the arc-shaped sliding groove 2421, enabling smooth sliding of the horizontal plate 2422 along the track of the arc-shaped sliding groove 2421. This sliding of the horizontal plate 2422 is the basic mechanical action that enables the relative displacement between adjacent arc-shaped pieces 242, directly driving the extension and contraction of the arc-shaped piece 242 group.

[0053] Furthermore, the limiting groove 2424 is formed on the horizontal plate 2422 and is arranged along the length direction of the horizontal plate 2422. The first sliding block 243 and the second sliding block 244 are constrained in this limiting groove 2424 for sliding. This design allows the sliding blocks to be not completely locked, but provides a clear and strictly constrained linear path for the movement of the sliding blocks, allowing the sliding blocks (i.e., the connected arc-shaped pieces 242) to make necessary and small linear adaptive adjustments along this path when the diameter of the ring body changes, to compensate for the geometric interference caused by the change in curvature. At the same time, the length of the limiting groove 2424 itself strictly defines the maximum stroke of the relative movement between adjacent arc-shaped pieces 242 in a single action, preventing excessive extension or contraction.

[0054] Referring to Figures 1-7 The working process of the high-efficiency welding device of the present application starts from device initialization, and the specific steps are as follows: Device preparation and placement of the egg beater: First, ensure that the device is in the initial state, i.e., the upper and lower telescopic rings 24 of the positioning clamp 2 are kept in the maximum diameter state (all arc-shaped pieces 242 are fully expanded, forming the largest ring body) by air pumping 4 to facilitate the placement of the egg beater. The operator vertically places the initially inserted egg beater with the stirring head at the bottom and the rod body at the top into the positioning clamp 2, where the flower petal-shaped stirring head composed of multiple U-shaped bent wires is inserted into the annular cavity of the rod body. At this time, since the stirring head and the rod body are only initially inserted and not firmly combined, the stirring head has a tendency to extrude from the cavity of the rod body due to its own elasticity. Therefore, the operator needs to manually hold the rod body, apply downward pressure to overcome this tendency, and maintain the vertical posture of the egg beater, while adjusting the position of the egg beater so that each U-shaped wire of the stirring head is aligned with the arc-shaped shell 241 of the upper and lower telescopic rings 24, ensuring that the bent parts of each U-shaped wire correspond to the notches 2411 on the lower surface of the inner wall of the arc-shaped shell 241.

[0055] Clamping positioning process: the operator starts the air pump 4, switches to the gas supply mode, and the gas enters the cavity 26 of the lower fixed ring 22 through the pipeline, and then enters the cavity 26 of the upper fixed ring 21 through the support cylinder 23. After the gas is filled, it first pushes the symmetrical multi-stage telescopic sleeve 25 connected with the lower fixed ring 22 to gradually extend (the inside of the multi-stage telescopic sleeve 25 is hollow and communicates with the cavity 26 of the fixed ring), and the extension of these telescopic sleeves drives the symmetrical arc-shaped shells 241 at the fixed position to also shrink inward. At the same time, the gas also pushes the symmetrical multi-stage telescopic sleeve 25 connected with the upper fixed ring 21 to gradually extend, driving the symmetrical arc-shaped shells 241 above to also shrink inward. In the shrinking process, the arc-shaped pieces 242 of each arc-shaped shell 241 gradually retract through the sliding connection mechanism (as described above, through the cooperation of the sliding block and the arc-shaped sliding groove 2421, and under the action of the horizontal plate 2422 and the spring 2423, it realizes smooth expansion and contraction), so that the telescopic ring 24 transitions from the maximum diameter state to the smaller diameter state. When the inner wall of the arc-shaped shell 241 contacts the U-shaped iron wire, the iron wire will slide along the arc of the inner wall of the arc-shaped shell 241 and finally be clamped into the notch 2411, achieving precise positioning. The notches 2411 of the upper and lower telescopic rings 24 are located on the same straight line, thereby ensuring that all U-shaped iron wires are vertically clamped to avoid deviation during welding. After clamping is completed, the operator stops manually holding, because the upper and lower telescopic rings 24 have firmly fixed the folded part of the stirring head, effectively inhibiting the tendency of the stirring head to extrude from the rod body cavity, ensuring the stability of the relative position between the rod body and the stirring head, the air pump 4 stops supplying gas, and the clamping state is maintained through internal pressure.

[0056] Welding execution process: after stable clamping and positioning, the operator starts the telescopic rod 321 and the angle adjusting seat 322 to adjust the position and angle of the welding gun 31, so that it is aligned with the pre-set welding point of the rod body annular cavity and the stirring head iron wire. Start the electric arc welding gun 31 to perform preliminary spot welding. Subsequently, start the motor 12, the motor 12 drives the turntable 11 input shaft through the belt 13, and drives the turntable 11 and the egg beater on the positioning clamp 2 to rotate at a constant speed. During the welding process, the welding gun 31 continuously works to continuously or intermittently weld multiple contact points on the circumference of the egg beater. One revolution of the turntable 11 can complete the welding of all points. Because the positioning clamp 2 ensures the stability and perpendicularity of the egg beater during rotation, the welding points are accurate, and the deformation or deviation of the flower bud-shaped structure is avoided.

[0057] Welding completion and release: after welding is completed, the welding gun 31 and the motor 12 are turned off, the operator switches the air pump 4 to the air extraction mode, extracts the gas from the cavity 26, and makes the multi-stage telescopic sleeve 25 gradually retract under the resetting action of the internal spring 2423 (the multi-stage telescopic sleeve 25 is provided with a resetting spring 2423, which automatically retracts after the gas pressure is removed) to drive the arc-shaped shell 241 and the arc-shaped piece 242 to expand, thereby restoring to the maximum diameter state. At this time, the egg beater is easily taken out, and the entire welding process is completed.

[0058] The workflow realizes fast clamping and releasing through pneumatic control, combines with rotary welding, significantly improves the welding efficiency and precision, and avoids the displacement and deformation problems caused by unstable clamping in traditional methods.

[0059] It should finally be pointed out that the methods and devices described in detail above are only embodiments, which a person skilled in the art can modify in different ways, without departing from the scope of the invention.

Claims

1. A high efficiency welding apparatus for metal whisk production, characterized by: The utility model relates to a kind of welding machine, including rotating drive assembly (1); Positioning fixture (2) is installed on the rotating drive assembly (1), and the positioning fixture (2) includes upper fixed ring (21), lower fixed ring (22) and multiple support cylinders (23) connecting the upper fixed ring (21) and the lower fixed ring (22), and the upper fixed ring (21) and the lower fixed ring (22) are provided with telescopic ring (24) in, and the outer side of each telescopic ring (24) annularly distributes multiple multistage telescopic sleeves (25), one end of the multistage telescopic sleeve (25) is hinged with the outer wall of fixed ring, the other end is hinged with the outer wall of telescopic ring (24), and the inside of the upper fixed ring (21), lower fixed ring (22) and support cylinder (23) constitutes the cavity (26) of intercommunication;Air pump (4) is connected with the cavity (26); Welding execution assembly (3) includes welding torch (31) and adjusting mechanism (32) for adjusting the position and angle of welding torch (31).

2. The high efficiency welding apparatus for metal whisk production of claim 1, wherein: The telescopic ring (24) includes a plurality of arc-shaped shells (241) arranged at equal intervals in a ring shape, and the number of the arc-shaped shells (241) is in a fixed proportional relationship with the number of iron wires in the egg-beating rod stirring head to be welded.

3. The high efficiency welding apparatus for metal whisk production of claim 2, wherein: A notch (2411) is formed at the midpoint of the inner wall lower surface of each arc-shaped shell (241), and the shape of the notch (2411) matches the profile of the single-sided iron wire after U-shaped bending.

4. The high efficiency welding apparatus for metal whisk production of claim 1, wherein: The telescopic ring (24) is composed of a plurality of arc-shaped shells (241), and a plurality of arc-shaped pieces (242) are sequentially arranged in each arc-shaped shell (241) from top to bottom. The arc-shaped piece (242) and the arc-shaped shell (241) are connected by a sliding member, and the arc-shaped piece (242) can be telescoped relative to the arc-shaped shell (241).

5. The high efficiency welding apparatus for metal whisk production of claim 4, wherein: The sliding member includes a first sliding block (243) arranged on the lower surface of the rear end of the upper arc-shaped piece (242), a second sliding block (244) arranged on the upper surface of the front end of the lower arc-shaped piece (242), and an arc-shaped sliding groove (2421) arranged on the upper and lower surfaces of the arc-shaped piece (242). The arc-shaped sliding groove (2421) is provided with a slidable horizontal plate (2422) and a spring (2423) for resetting the horizontal plate (2422). A limiting groove (2424) is formed on the horizontal plate (2422). The first sliding block (243) of the rear end of the upper arc-shaped piece (242) is embedded in the arc-shaped sliding groove (2421) of the lower arc-shaped piece (242) and slides in the limiting groove (2424) of the horizontal plate (2422). The second sliding block (244) of the front end of the lower arc-shaped piece (242) is embedded in the arc-shaped sliding groove (2421) of the upper arc-shaped piece (242) and slides in the limiting groove (2424) of the horizontal plate (2422).

6. The high efficiency welding apparatus for metal whisk production of claim 1, wherein: The width of the cavity cross section of the arc-shaped shell (241) is greater than the cross-sectional width of the arc-shaped piece (242), the horizontal plate (2422) is perpendicular to the arc-shaped sliding groove (2421), and the limiting groove (2424) is arranged along the length direction of the horizontal plate (2422).

7. The high efficiency welding apparatus for metal whisk production of claim 1, wherein: The number of the multi-stage telescopic sleeves (25) is four, which are divided into two groups corresponding to the upper fixed ring (21) and the lower fixed ring (22) respectively, and each group is symmetrically distributed with the center of the telescopic ring (24) as the center.

8. The high efficiency welding apparatus for metal whisk production of claim 1, wherein: Further comprising a base (5), a box (6) arranged on the base (5), a support frame (7) arranged in the box (6) and above the base (5), a rotating table (11) rotatably arranged above the support frame (7) through a bearing, and the positioning clamp (2) is arranged on the rotating table (11).

9. The high efficiency welding apparatus for metal whisk production of claim 8, wherein: The rotating drive assembly (1) comprises the rotating table (11), a motor (12), a driving wheel connected with an output shaft of the motor (12), a driven wheel connected with an input shaft of the rotating table (11), and a belt (13) sleeved on the driving wheel and the driven wheel.

10. The high efficiency welding apparatus for metal whisk production of claim 1, wherein: The adjusting mechanism (32) comprises a telescopic rod (321) and an angle adjusting seat (322) arranged at the top end of the telescopic rod (321), the angle adjusting seat (322) is fixedly connected with the welding gun (31), and the welding gun (31) is an electric arc welding gun (31).

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