Wire feeder and wire feeder device

Abstract

This invention provides a wire feeding head and a wire feeding device. The wire feeding head includes two sets of clamping arms, both rotatably mounted on the outer cylinder on the wire exit side of the wire threading hole, and each equipped with a biting part and a shearing blade. The wire feeding device further includes a wire feeding mechanism, which includes at least two fixed follower wheels and a storage wheel movable between the two follower wheels. The storage wheel changes the length of the metal wire between the two follower wheels as it moves. This wire feeding head and device simultaneously cut and clamp the metal wire, simplifying the wire collection process. This simplifies the equipment's structural design and control logic, ensures the equipment's maintainability and reliability, and improves the continuity and stability of the production process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pre-welding bundling equipment of brazing parts, and particularly relates to a wire feeding head and a wire feeding device. BACKGROUND

[0002] A vehicle or the like is generally equipped with a radiator (condenser) or the like to accelerate the heat dissipation of a key heat source such as an engine, so as to ensure normal operation of the equipment. The radiator is assembled by brazing process to realize batch welding and improve production efficiency. In order to ensure the quality of the finished product after welding, the radiator parts need to be fixed in shape by bundling first. In the prior art, there are completely manual bundling or semi-automatic equipment to complete the above bundling work.

[0003] Specifically, a utility model patent named "Radiator core bundling device" with the publication number CN205022953U discloses a bundling tool for manual bundling operation, which realizes the knot fixing of the end of the steel wire rope for bundling by rotating the hook head of the tool. This is only a schematic of a tool for manual operation. In addition, a utility model application named "Automobile radiator core bundling machine" with the publication number CN206143547U also discloses a semi-automatic tool for radiator bundling, which is used to limit the radiator core to a predetermined shape to facilitate the bundling of the radiator. In fact, in manual operation, the shape structure of the radiator, the fixed position of the steel wire rope on the radiator, and the tightness of the knot fixing of the steel wire rope cannot be accurately controlled, which makes it difficult to effectively guarantee the quality of the brazed radiator after welding. In addition, due to the multiple operation steps in the manual operation process, the manual operation is relatively cumbersome, which limits the improvement of the efficiency of manual operation.

[0004] A utility model patent named "Full-automatic core bundling robot" with the publication number CN209667434U discloses a core bundling device, which includes a pneumatic shear and a clamping jaw fingertip in the wire feeding and bundling part, respectively used for cutting and clamping the metal wire. Since the pneumatic shear and the clamping jaw fingertip are independently set and driven, the structure of the bundling head is more complex and inconvenient for daily maintenance. On the other hand, it also means that the sequence between the pneumatic shear and the clamping jaw fingertip needs to be determined and controlled in the control program, which makes the program design more complex. In addition, in the scheme, the winding of the metal wire around the core body is realized by winding the metal wire on the core body driven by the ring chain. This requires to set a driving part and a mechanical part for driving the clamping head of the ring chain, which makes the control logic and structure of the whole device more complex. SUMMARY

[0005] In view of the fact that the existing brazing piece bundling operation relies on manual operation, it is difficult to realize the standardization control of the bundling quality and limits the production efficiency improvement, and the existing brazing piece bundling equipment has the problems of complex structure composition and complex system overall control logic, the application provides a wire feeding head and a wire feeding device.

[0006] The technical scheme of the application provides a wire feeding head, which comprises an outer cylinder and an inner cylinder arranged along the same axis, the outer cylinder is arranged outside the inner cylinder, the inner cylinder is provided with a threading hole for the metal wire to pass through along the axis, and the outer cylinder and the inner cylinder can relatively displace along the axis and relatively rotate around the axis;

[0007] Further comprising two sets of clamping arms arranged oppositely, the two sets of clamping arms are rotationally arranged on the outer cylinder on the wire outlet side of the threading hole, and the opposite sides of the two sets of clamping arms are provided with a clamping part and a shearing blade;

[0008] The metal wire can pass through between the two sets of clamping arms, and the inner cylinder drives the two sets of clamping arms to open or close when moving along the axis.

[0009] Preferably, the shearing blade is arranged upstream of the clamping part of the clamping arm in the metal wire feeding direction.

[0010] Preferably, further comprising a connecting piece, the connecting piece is arranged on the wire outlet side of the inner cylinder and can freely rotate around the axis relative to the inner cylinder; the connecting piece is connected to the clamping arm through a connecting rod mechanism to drive the clamping arm to open or close when the inner cylinder moves.

[0011] Preferably, the clamping part is provided with an elastic part.

[0012] Preferably, the connection between the clamping part and the shearing blade is further provided with an elastic part.

[0013] The technical scheme of the application further provides a wire feeding device, which comprises the wire feeding head of any one of the above, and further comprises a wire feeding mechanism arranged upstream of the wire feeding head in the metal wire feeding direction, the wire feeding mechanism comprises a storage assembly, the storage assembly comprises at least two position-fixed follower wheels and a storage wheel movably arranged between the two follower wheels, and the length of the metal wire between the two follower wheels is changed when the storage wheel moves.

[0014] Preferably, the storage wheel is movably arranged in the normal direction of the line between the two follower wheels.

[0015] Preferably, the storage wheel is movably arranged on one or more vertical guide rails.

[0016] Preferably, the wire feeding mechanism further comprises a wire feeding assembly arranged between the storage assembly and the wire feeding head, the wire feeding assembly comprises a driving wheel in frictional contact with the metal wire, and the metal wire is fed by the driving wheel.

[0017] Preferably, the wire feeding mechanism is further provided with a straightening assembly between the storage assembly and the wire feeding head, the straightening assembly comprising a plurality of straightening wheels arranged on both sides of the wire along the feeding direction for straightening and feeding the wire.

[0018] The wire feeding head of the present application is provided with the shearing blade and the clamping arm simultaneously, and the simultaneous shearing and pressing operation of the wire is realized through single operation of the clamping arm, which obviously simplifies the structure of the wire feeding head, realizes the effect of performing two operations simultaneously by one drive, and solves the problem of instability of the clamping arm in the operation process, including the continuity and stability in the production process, due to the targeted design of the structure of the clamping arm.

[0019] On this basis, the wire feeding device comprises a wire feeding mechanism which can realize wire storage through the storage assembly, so that the wire will not be loose, separated from the equipment, or scattered in a loose manner on the feeding device to cause the problem of jamming in the subsequent feeding process. The wire can also rely on its own weight to realize the wire storage operation, which can simplify the structural design and control logic of the equipment and ensure the maintainability and reliability of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the bundling equipment of the present application;

[0021] Figure 2 It is a schematic diagram of the structure of the wire feeding device of the present application;

[0022] Figure 3 It is a working schematic diagram of the wire feeding mechanism 12 of the present application;

[0023] Figure 4 It is a schematic diagram of the structure of the wire feeding head 11 of the present application;

[0024] Figure 5 It is a schematic diagram of the A-A section of the wire feeding head 11 of the present application;

[0025] Figure 6 It is a schematic diagram of the Figure 5 It is a local enlarged schematic diagram of B in the present application;

[0026] Figure 7 It is a schematic diagram of another embodiment of the clamping arm 112 of the present application;

[0027] Figure 8 It is a schematic diagram of the wire guide device 4 of the present application;

[0028] Figure 9 It is a schematic diagram of the fixed U-shaped plate 431 and the movable U-shaped plate 432 of the wire guide device 4 of the present application;

[0029] Figure 10A schematic view of a specific structure of the material receiving mechanism 13 of the present application.

[0030] Figure 11 A schematic view of the structure of the servo platform 3 of the present application.

[0031] In the figure,

[0032] W: metal wire X: heat sink F: feeding direction O: axis 1: wire feeding device 2: feeding device 3: servo platform 4: wire guide device 11: wire feeding head 12: wire feeding mechanism 13: material receiving mechanism 21: material roll 22: guide mechanism 31: moving platform 4A: U-shaped opening 41: first guide arm 42: second guide arm 43: U-shaped arm 44: positioning assembly 4W: wire feeding groove 111: moving part 112: clamping arm 113: outer cylinder 114: inner cylinder 115: driving member 11W: threading hole 121: material storage assembly 122: wire feeding assembly 123: straightening assembly 131: clamping member 132: clamping seat 133: lifting slide rail 134: lifting cylinder 221: guide wheel 311: fixed support member 312: moving support member 313: clamping assembly 431: fixed U-shaped plate 432: moving U-shaped plate 1101: guide rail 1102: telescopic member 1103: power device 1104: synchronous belt 1121: driving link 112W: working surface 1122: engagement part 1123: shearing blade 1124: elastic part 1141: connecting member 1211: follower wheel 1212: material storage wheel 1213: vertical guide rail 1221: driving wheel 1222: compression wheel 1231: straightening wheel 3131: fixed clamping end 3132: moving clamping end 3133: limiting block. DETAILED DESCRIPTION

[0033] The present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments. In the present specification, the size proportions of the drawings do not represent actual size proportions, which are only used to reflect the relative positional relationship and connection relationship between the components. Components with the same name or the same reference numeral represent similar or identical structures, and are only for illustrative purposes.

[0034] The present application aims to provide a bundling device to realize automatic bundling operation of brazing pieces, thereby improving the quality stability and production efficiency of the bundling operation. The overall structure of the bundling device of the present application is shown in Figure 1 The bundling device includes a feeding device 2, a wire feeding device 1 and a servo platform 3 arranged in sequence along the feeding direction F of the metal wire W, and further includes a wire guide device 4. The heat sink X is fixed on the servo platform 3; the metal wire W emitted by the feeding device 2 first passes through the wire feeding device 1 into the wire guide device 4 and is folded back to the wire feeding device 1, realizing one round around the heat sink X; the wire feeding device 1 cuts off the metal wire W and knots the end of the metal wire W, realizing the bundling operation of the metal wire W on the heat sink X.

[0035] The feeding device 2 includes a roll 21 on which a wire roll is mounted, and a guide mechanism 22 that guides the wire W, on which a plurality of guide wheels 221 are arranged to smoothly guide the wire W fed by the roll 21 into the wire feeding device 1.

[0036] The wire feeding device 1 includes a wire feeding mechanism 12 and a wire feeding head 11 arranged in sequence along the wire feeding direction F. The wire feeding mechanism 12 drives the wire W to feed, and the wire feeding head 11 is used to feed the wire W to the wire guide device 4 and perform corresponding other operations.

[0037] The servo platform 3 is arranged in front of the wire feeding head 11 along the wire feeding direction F, and is used to support and fix the heat sink X. When the heat sink X is temporarily fixed on the servo platform 3, it is usually deviated to one side in the wire feeding direction F, so that the wire W can pass through the side surface of the heat sink X after being fed from the wire feeding head 11.

[0038] The wire guide device 4 is arranged above the servo platform 3, and has a U-shaped opening 4A facing the wire feeding head 11. When the heat sink X on the wire feeding head 11 is placed on the servo platform 3, it is also located inside the U-shaped opening 4A of the wire guide device 4. The two sides of the U-shaped opening 4A are respectively a first guide arm 41 and a second guide arm 42, and a wire feeding groove 4W penetrates through the first guide arm 41 and the second guide arm 42 and communicates with the root of the U-shaped opening 4A. The wire feeding groove 4W arranged on one of the first guide arm 41 and the second guide arm 42 is aligned with the wire feeding head 11 to receive the wire W from the wire feeding head 11. The wire W winds around the heat sink X almost one round from the first guide arm, and then extends from the wire feeding groove 4W on the other of the first guide arm 41 and the second guide arm 42, and is captured again by the wire feeding head 11 to form a ring that completes the winding around the heat sink X, and realizes the bundling and fixing of the heat sink X through the tightening and winding between the ends of the wire W on both sides of the heat sink X.

[0039] Figure 2 The structure of the wire feeding device 1 is shown in the figure. In addition to the wire feeding mechanism 12 and the wire feeding head 11, it can also include a material collecting mechanism 13.

[0040] The wire feeding mechanism 12 is arranged downstream of the feeding device 2 along the feeding direction F, receives the wire W sent out from the feeding device 2, and includes a storage assembly 121, a wire feeding assembly 122, and a straightening assembly 123 arranged on the moving path of the wire W. The storage assembly 121 includes at least two fixed-position follow-up wheels 1211 and a storage wheel 1212 movable in a direction deviating from the feeding direction F. After passing through one of the follow-up wheels 1211, the wire W passes around the storage wheel 1212 and then passes out from the other follow-up wheel 1211. Thus, when the position of the storage wheel 1212 changes, the length of the portion of the wire W between the two follow-up wheels 1211 changes, i.e., the storage function of the wire feeding mechanism 12 is realized. The storage wheel 1212 is arranged to move in the normal direction of the line connecting the follow-up wheels 1211 so that the bending angles of the wire W on both sides are not too large, thereby reducing the feeding resistance. The storage wheel 1212 is arranged to freely slide on one or more vertical guide rails 1213, and preferably, the sliding direction of the vertical guide rail 1213 is perpendicular to the feeding direction F of the wire W. The wire feeding assembly 122 is arranged downstream of the storage assembly 121 along the feeding direction F, and includes a driving wheel 1221 in frictional contact with the wire W. The driving wheel 1221 drives the wire W to move downstream along the feeding direction F. A pressing wheel 1222 is arranged on the side opposite to the driving wheel 1221 relative to the wire W. The driving wheel 1221 and the pressing wheel 1222 press the wire W therebetween so as to provide sufficient side pressure to the wire W, thereby ensuring that the wire W does not slide on the driving wheel 1221 as much as possible during driving. One or more follow-up guide wheels can be arranged upstream of the wire feeding assembly 122 to guide the wire W from the storage assembly 121 to the wire feeding assembly 122. The straightening assembly 123 is arranged downstream of the wire feeding assembly 122, and includes a plurality of straightening wheels 1231 arranged on both sides of the straight line along the feeding direction F, thereby straightening the wire W and sending it out. In fact, although it is preferred to arrange the straightening assembly 123 downstream of the wire feeding assembly 122 to ensure that the wire feeding mechanism 12 sends out the wire W straight, thereby providing more stable operation space for subsequent operations. Alternatively, the straightening assembly 123 can be arranged upstream of the wire feeding assembly 122. In this case, the straightening assembly 123 can be arranged between the storage assembly 121 and the wire feeding assembly 122, and the straightening axis of the straightening assembly 123 and the discharge axis of the wire feeding assembly 122 are preferably just collinear to ensure that the wire W does not bend again after straightening.

[0041] Referring to Figure 3The working principle of the storage device is as follows. The feeding resistance of the roll 21 is greater than that of the storage wheel 1212. During the feeding process, the wire feeding assembly 122 drives the metal wire W to advance, regardless of the position of the storage wheel 1212. When the metal wire W advances, the part of the metal wire W in the storage assembly 121 is shortened due to the continuous advancement of the metal wire W, the storage wheel 1212 is lifted to the upper dead point (at A), and then the subsequent metal wire W is discharged by the rotation of the roll 21. At the same time, during the bundling process, the metal wire W that is pre-fed needs to be almost one turn around the radiator X through the wire feeding groove 4W, and then needs to be tightly knotted against the surface of the radiator X during knotting. Therefore, it is necessary to return the metal wire W that is excessively fed back before knotting. During the return process, the wire feeding assembly 122 reversely drives the metal wire W to return in the feeding direction F, at this time, the metal wire W in the storage assembly 121 is lengthened, and the storage wheel 1212 falls along the vertical guide rail 1213 to keep tension (at B), and the part of the metal wire W that is returned during the return process is stored in the storage assembly 121. Based on the above process, the roll 21 of the feeding device 2 can be set as a non-powered drive. Even in this case, it can still be ensured that the metal wire W is always in a pre-tensioned state in the system during the return process, and the problem of system failure caused by the metal wire W being loosened and coming out of other wheel systems does not occur. At the same time, in the above scheme of the storage assembly 121, the movement of the storage wheel 1212 is realized by the driving of the wire feeding assembly 122 and the self-weight of the storage wheel 1212, and an additional power source does not need to be additionally arranged in the storage assembly 121, which simplifies the structure of the system.

[0042] Figure 4 The structure of the wire feeding head 11 is shown in the figure. The wire feeding head 11 is movably arranged on the base of the wire feeding device 1 along the feeding direction F, and the wire feeding head 11 comprises a moving part 111 arranged along the feeding direction F of the metal wire W, the metal wire W passes through the moving part 111, and the outgoing end of the metal wire W is provided with clamping arms 112 arranged on both sides of the metal wire W on the moving part 111. The relative opening and closing of the two clamping arms 112 realize the clamping and cutting of the metal wire W. In the embodiment, the wire feeding head 11 is movably arranged on two parallel guide rails 1101 arranged on the base of the wire feeding device 1, and is driven by a telescopic member 1102 arranged between the base and the wire feeding head 11 in parallel with the guide rails 1101. The telescopic member 1102 is commonly a gas cylinder, an electric cylinder or a screw rod rotating pair. The wire feeding head 11 is additionally provided with a power device for driving the moving part 111, and the two are synchronously driven by a synchronous belt.

[0043] Figure 5 The structure of the wire feeding head 11 is shown in the figure. The wire feeding head 11 is movably arranged on the base of the wire feeding device 1 along the feeding direction F, and the wire feeding head 11 comprises a moving part 111 arranged along the feeding direction F of the metal wire W, the metal wire W passes through the moving part 111, and the outgoing end of the metal wire W is provided with clamping arms 112 arranged on both sides of the metal wire W on the moving part 111. The relative opening and closing of the two clamping arms 112 realize the clamping and cutting of the metal wire W. In the embodiment, the wire feeding head 11 is movably arranged on two parallel guide rails 1101 arranged on the base of the wire feeding device 1, and is driven by a telescopic member 1102 arranged between the base and the wire feeding head 11 in parallel with the guide rails 1101. The telescopic member 1102 is commonly a gas cylinder, an electric cylinder or a screw rod rotating pair. The wire feeding head 11 is additionally provided with a power device for driving the moving part 111, and the two are synchronously driven by a synchronous belt. Figure 4Figure 2 is a schematic view of the cross section along A-A. The action part 111 comprises an outer cylinder 113 and an inner cylinder 114 arranged along the same axis O, and the two are nested and can rotate and move along the axis relative to each other. The inner cylinder 114 is driven to rotate around the axis O by the power device 1103 through the synchronous belt 1104. The inner cylinder 114 has a wire hole 11W coaxially arranged on it, and the wire W is threaded through the wire hole 11W. The inner cylinder 114 is driven to move along the axis O by a driving element 115 arranged at the wire-in end of the inner cylinder 114. Two sets of clamping arms 112 are arranged at the wire-out side of the outer cylinder 113. The clamping arms 112 are arranged on both sides of the wire W, and one end of the clamping arms 112 is rotatably arranged on the outer cylinder 113, which allows the clamping arms 112 to rotate relative to each other, and the other end is provided with a working surface 112W for clamping and cutting the wire W. The clamping arms 112 are further rotatably arranged through a driving link 1121 and a connecting element 1141, and the connecting element 1141 is rotatably arranged at the wire-out end of the inner cylinder 114 and can rotate relative to the inner cylinder 114 around the axis O. In this way, when the inner cylinder 114 is controlled to move along the axis O, the clamping arms 112 are driven to open and close through the connecting element 1141 and the driving link 1121, thereby achieving the operation of the wire W. At the same time, the clamping arms 112 can rotate around the axis O together with the outer cylinder 113, and the connecting element 1141 can ensure that the inner cylinder 114 controls the opening and closing of the clamping arms 112 when the clamping arms 112 rotate around the axis O.

[0044] Figure 6 For Figure 5 Figure 3 is a schematic view of the enlarged detail at B. The working surface 112W comprises a clamping part 1122 and a cutting blade 1123 arranged at the end of the clamping arm 112, and the wire W is threaded through the clamping part 1122 and the cutting blade 1123 between the two clamping arms 112 in sequence after being threaded through the wire hole 11W. Generally, in order to ensure that the clamping part 1122 can clamp the wire W when cutting the wire W, the cutting blade 1123 is generally arranged upstream of the clamping part 1122 along the feeding direction F, i.e., the wire W passes through the cutting blade 1123 first and then passes through the clamping part 1122 when feeding. After completing one round around the radiator X, the head of the wire W returns to the clamping part 1122, and the inner cylinder 114 moves along the axis O to make the two clamping arms 112 relatively close to each other, so that the cutting blade 1123 cuts the wire W, and at the same time, the clamping part 1122 clamps the wire W, and then the outer cylinder 113 drives the clamping arms 112 to rotate to make the end of the wire W clamped in the clamping arms 112 to be twisted and complete the knot.

[0045] However, in actual use, the timing of the two actions of the shearing blade 1123 and the clamping portion 1122 is difficult to match and adjust, resulting in the problem that when the clamping portion 1122 can compress the wire W, the shearing blade 1123 cannot stably cut the wire W, or another situation occurs, that is, after the shearing blade 1123 cuts the wire W in advance, the clamping portion 1122 cannot compress it, resulting in the problem that the wire W is pulled out of the clamping portion 1122, which will stop the working process of the invention, thereby affecting the stability of production. For this purpose, see Figure 6 and Figure 7 The schematic diagram of the embodiment of the clamping portion 1122 or the connection between the clamping portion 1122 and the shearing blade 1123 is also provided with an elastic portion 1124, which makes the effective action period between the clamping portion 1122 and the shearing blade 1123 have greater coincidence, that is, under the action of the elastic portion 1124, the clamping portion 1122 can have sufficient compression force to compress the wire W and still retain a certain compressible amount, providing space for the shearing blade 1123 to continue to move, so that the shearing blade 1123 cuts later after the clamping portion 1122 is compressed, thereby ensuring the working reliability of the wire feeding head 11.

[0046] Figure 8 The structure of the wire guide device 4 is shown in the schematic diagram. The wire guide device 4 includes a U-shaped arm 43 arranged around three sides of the heat sink X, and the U-shaped opening 4A formed by the U-shaped arm 43 faces the wire feeding device 1, and forms a first guide arm 41 and a second guide arm 42 on both sides of the heat sink X, respectively. Referring to the schematic diagram of the fixed U-shaped plate 431 and the movable U-shaped plate 432 of Figure 9 The U-shaped arm 43 includes a fixed U-shaped plate 431 and a movable U-shaped plate 432 arranged on one side of the fixed U-shaped plate 431 and controlled to move along the surface normal, and a wire feeding groove 4W extending from the end of the first guide arm 41 to the end of the second guide arm 42 is arranged on the surface of the opposite side or both sides of the fixed U-shaped plate 431 and the movable U-shaped plate 432. When the movable U-shaped plate 432 moves to abut against the fixed U-shaped plate 431, the wire feeding groove 4W is closed to only two openings on the first guide arm 41 and the second guide arm 42, the wire W enters from one side of the opening, almost one turn around the U-shaped arm 43 along the wire feeding groove 4W to the other side of the opening, and is received by the wire feeding device 1. When the movable U-shaped plate 432 moves away from the fixed U-shaped plate 431, the wire feeding groove 4W is opened, and the wire W is pulled out from the gap between the fixed U-shaped plate 431 and the movable U-shaped plate 432 and wound on the heat sink X.

[0047] The wire guide device 4 also includes at least one positioning component 44. The positioning component 44 comprises at least two opposing components extending into the U-shaped opening 4A, forming a through connection between them. These components are typically set to be equal to or slightly larger than the diameter of the metal wire W. When approaching the heat sink X, the metal wire W moves from the surface of the heat sink X. Besides guiding the metal wire W during its exit from the wire feeding groove 4W, this also restricts the positional movement of the metal wire W on the surface of the heat sink X during subsequent bundling, thus ensuring that the metal wire W is precisely bundled and fixed at a specific position on the heat sink X. Multiple metal wires W can be arranged in the U-shaped opening 4A to precisely control the position of the metal wire W along the surface of the heat sink X. Furthermore, considering the adaptation to different heat sinks X and the convenience of loading the heat sink X onto the servo platform 3, a movable configuration is preferred; for example, it can be... Figure 7 As shown, the arm is configured to move outward along the normal direction of three sides of the U-shaped arm 43. During loading, it exits the working position to provide more space for the heat sink X to move. During the wire W detachment and bundling, it advances to contact the surface of the heat sink X for guidance and limiting. Figure 7 The embodiment shown illustrates a scheme using a rack and pinion structure to drive displacement. Here, the metal wire W is driven forward in the wire feeding groove 4W solely by the wire feeding mechanism 12 in the original wire feeding head 11. Therefore, the wire guiding device 4 only needs to periodically release the metal wire W by controlling the translation of the movable U-shaped plate 432, instead of setting up an additional mechanism to pull the metal wire W. This undoubtedly simplifies the overall structure of the wire guiding device 4. At the same time, since the speed of the metal wire W is determined by the clamping arm 112, no traction mechanism is needed, and the inertia of the entire traction mechanism does not need to be considered. The speed at which the metal wire W passes through the wire W can be greatly increased, thereby improving the threading efficiency of the metal wire W bundling operation. Actual measurements show that the threading efficiency can be improved by more than double.

[0048] Back Figure 2 The wire feeding device 1 also includes a receiving mechanism 13, which is used to grab the end of the metal wire W that has passed through the wire feeding groove 4W and feed the end of the metal wire W into the biting part 1122 for temporary fixation. Figure 10 This is a schematic diagram of the specific structure of the receiving mechanism 13. Specifically, the receiving mechanism 13 includes a clamping member 131 for holding the end of the metal wire W. The clamping member 131 can be a pneumatic finger as shown in the figure. The clamping member 131 also has at least one degree of freedom of movement between the end of the first guide arm 41 and the end of the second guide arm 42. Figure 10 In one embodiment, the clamping member 131 is disposed on the clamping seat 132, which moves in a direction parallel to the line connecting the end of the first guide arm 41 and the end of the second guide arm 42. The movement freedom of the clamping member 131 is realized by the lifting slide rail 133 and the lifting cylinder 134.

[0049] Figure 11Fig. 2 is a schematic diagram of the mechanism of the servo platform 3. The servo platform 3 is provided with a moving platform 31 which moves along the normal direction of the feeding direction F of the wire W, and when the heat sink X is arranged on the moving platform 31, the position of the heat sink X in the normal direction of the feeding direction F can be adjusted by the movement of the moving platform 31. The moving platform 31 is provided with a fixed support 311 on one side and a moving support 312 on the other side in the normal direction of the feeding direction F, respectively. The fixed support 311 is relatively fixed on the moving platform 31, and the moving support 312 is arranged to move along the normal direction of the feeding direction F on the moving platform 31, which means that the distance between the fixed support 311 and the moving support 312 can be adjusted according to the size of the heat sink X, and at the same time, the clamping assembly 313 with adjustable distance in the feeding direction F is arranged on both the fixed support 311 and the moving support 312, respectively, to adapt and clamp the two ends of the fixed heat sink X. The clamping assembly 313 is generally provided with a fixed clamping end 3131 and a moving clamping end 3132 arranged in the direction parallel to the feeding direction F, and the position of the moving clamping end 3132 in the feeding direction F is adjustable to adjust the distance between the fixed clamping end 3131 and the moving clamping end 3132, so as to realize the clamping and fixing of the heat sink X. Optionally, at least one set of the clamping assembly 313 is provided with a limiting block 3133 which limits the position of the heat sink X in the normal direction of the feeding direction F on the clamping assembly 313.

[0050] The position of the moving platform 31 in the normal direction of the feeding direction F is generally determined according to the need, so as to determine the position of the wire W on the heat sink X. Then, the distance between the fixed support 311 and the moving support 312 is set according to the size of the heat sink X, so that the heat sink X can be supported at both ends on the fixed support 311 and the moving support 312, and will not interfere with the bundling process too much. When the heat sink X is arranged on the moving platform 31 and supported at both ends on the fixed support 311 and the moving support 312, respectively, the moving clamping end 3132 is moved to the appropriate position, and the fixed clamping end 3131 clamps and fixes the heat sink X. In the automatic production process, after the wire feeding device 1 completes a bundling operation, the moving platform 31 can move a suitable distance in the normal direction of the feeding direction F to automatically realize the bundling operation of multiple wires W on the heat sink X. The controlled movement of the moving platform 31, the moving support 312 and the moving clamping end 3132 includes but is not limited to the guide rail and motor-driven screw transmission pair shown in the following. Figure 11

[0051] For the feeding direction F described in the present application, it should not be mechanically understood. It should be understood according to the local movement direction of the wire W. Specifically, it is obvious that the wire W does not need to ensure that the feeding direction is unchanged in the whole path, which means that at different positions on the wire W feeding path, it can correspond to different feeding directions F.

[0052] ​The working steps of the present application are as follows.

[0053] Servo platform 3 positioning step. After the temporary fixing of the heat sink X on the moving platform 31 is completed, the moving platform 31 is moved to a predetermined position in the normal direction of the feeding direction F, so that the heat sink X enters the U-shaped opening 4A in the normal direction of the feeding direction F, and stays in its position to be bundled in alignment with the U-shaped opening 4A. Usually, the moving platform 31 will be located at the loading position before the cycle and the distance between the fixed support 311 and the moving support 312 will be preset so that the heat sink X is straddled on the fixed support 311 and the moving support 312. The heat sink X is clamped by the fixed clamping end 3131 and the moving clamping end 3132, and during the clamping process, the heat sink X is optionally abutted against the limiting block 3133 to ensure the positioning in the normal direction of the feeding direction F. Then, according to the predetermined depth, the heat sink X enters the U-shaped opening 4A.

[0054] Wire feeding device 1 wire feeding step. The wire feeding head 11 moves and aligns the wire W to the wire feeding slot 4W on one of the first guide arm 41 and the second guide arm 42, the wire feeding mechanism 12 rotates forward to feed the wire W forward, the straightened wire W enters the wire feeding slot 4W after passing through the threading hole 11W, and then advances in the wire feeding slot 4W and passes out from the other end of the wire feeding slot 4W after almost one round around the heat sink X. During this process, the clamping arm 112 is in an open state to avoid blocking the wire W from advancing. The fixed U-shaped plate 431 and the movable U-shaped plate 432 are relatively close or almost close to each other, so that the wire W can be guided to advance in the wire feeding slot 4W.

[0055] Wire collecting mechanism 13 wire collecting step. The clamping piece 131 of the wire collecting mechanism 13 captures the end of the wire W at the other end of the wire feeding slot 4W, the clamping piece 131 is relatively closed to clamp the end of the wire W, and then moves to the end of the wire feeding slot 4W where the wire feeding head 11 is located, and feeds the end of the wire W into the clamping arm 112. In order to achieve this, the two clamping arms 112 are usually rotated to a gap therebetween which is generally parallel to the moving direction of the wire W, so as to facilitate the end of the wire W to enter the gap.

[0056] Movable U-shaped plate 432 opening step. The movable U-shaped plate 432 is opened to release the wire W.

[0057] Wire feeding mechanism 12 receives the wire. When the dynamic U-shaped plate 432 is opened or after it is opened, the wire W is in a relaxed state. The wire W released after the dynamic U-shaped plate 432 is opened is received by the wire storage assembly 121 and stored in the curved path formed by the wire storage assembly 121 due to the sinking. At this time, the wire W is received and will pass more closely around or against the surface of the heat sink X, which does not require additional power support. Of course, in order to accurately control the wire receiving process, the wire feeding assembly 122 can be reversed to accurately control the amount of wire W received.

[0058] Wire feeding head 11 knotting step. After the wire feeding mechanism 12 receives the wire W, the clamping arm 112 is turned from open to closed, cutting and clamping the wire W between the wire hole 11W outlet and the wire slot 4W inlet while pressing the wire W, and the wire W end part from the clamping piece 131 is also clamped. The clamping arm 112 is turned a predetermined number of turns, and the two ends of the wire W are spirally wound together at the knot. Thus, the wire W fixes the heat sink X. Preferably, the wire feeding head 11 is arranged to move on the base, which can gradually move closer to the heat sink X according to the number of turns, thereby preventing the wire W from breaking due to excessive force during spiral winding, and also ensuring that the wire W can be tightly attached to the heat sink X after spiral winding without loosening.

[0059] Generally, multiple wires W need to be bundled at intervals on the same heat sink X to ensure that the heat sink X is well joined during brazing. Therefore, in the next cycle, the moving platform 31 drives the heat sink X to move a predetermined distance along the normal direction of the feeding direction F, and turns to the wire feeding step to continue the following steps to complete the next bundling process.

[0060] The above only describes the preferred embodiments of the present application, and does not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A wire feeding head, characterized in that, It includes an outer cylinder (113) and an inner cylinder (114) arranged along the same axis (O). The outer cylinder (113) is located outside the inner cylinder (114). The inner cylinder (114) has a wire hole (11W) along the axis (O) for a metal wire (W) to pass through. The outer cylinder (113) and the inner cylinder (114) can be relative to each other along the axis and can rotate relative to each other around the axis. It also includes two sets of clamping arms (112) arranged opposite to each other. The two sets of clamping arms (112) are rotatably arranged on the outer cylinder (113) on the wire outlet side of the wire hole (11W). The two sets of clamping arms (112) are provided with a biting part (1122) and a shearing blade (1123) on opposite sides. Furthermore, an elastic portion (1124) is provided on the biting portion (1122); Under the action of the elastic part (1124), the biting part (1122) presses the metal wire (W) and retains a certain amount of compressibility, providing space for the shearing blade (1123) to continue to move, so that the shearing blade (1123) cuts shortly after being pressed by the biting part (1122), thereby ensuring the working reliability of the wire feeding head (11). The wire (W) can pass between the two sets of clamping arms (112), and the inner cylinder (114) drives the two sets of clamping arms (112) to open or close relative to each other when it moves along the axis.

2. The wire feeding head as described in claim 1, characterized in that, The shearing blade (1123) is located upstream of the biting part (1122) of the clamping arm (112) along the feeding direction of the wire (W).

3. The wire feeding head as described in claim 2, characterized in that, It also includes a connector (1141), which is located on the outlet side of the inner cylinder (114) and can rotate freely relative to the inner cylinder (114) around the axis (O); the connector (1141) is connected to the clamping arm (112) via a linkage mechanism to drive the clamping arm (112) to open and close when the inner cylinder (114) moves.

4. A wire feeding device, characterized in that, The device includes the wire feeding head as described in any one of claims 1-3, and further includes a wire feeding mechanism (12) disposed upstream of the wire feeding head along the wire (W) feeding direction. The wire feeding mechanism (12) includes a storage assembly (121), which includes at least two fixed follower wheels (1211) and a storage wheel (1212) movable between the two follower wheels (1211). When the storage wheel (1212) moves, it changes the length of the wire (W) between the two follower wheels (1211).

5. The wire feeding device as described in claim 4, characterized in that, The storage wheel (1212) is positioned to move normally along the line connecting the two follower wheels (1211).

6. The wire feeding device as described in claim 5, characterized in that, The storage wheel (1212) is slidably mounted on one or more sets of vertical guide rails (1213).

7. The wire feeding device as described in claim 5, characterized in that, The wire feeding mechanism (12) further includes a wire feeding assembly (122) disposed between the material storage assembly (121) and the wire feeding head. The wire feeding assembly (122) includes a drive wheel (1221) that is in frictional contact with the metal wire (W). The metal wire (W) is fed by the drive wheel (1221).

8. The wire feeding device as described in claim 7, characterized in that, The wire feeding mechanism (12) also has a straightening component (123) between the storage component (121) and the wire feeding head. The straightening component (123) includes a plurality of straightening wheels (1231) arranged on both sides of the metal wire (W) along the feeding direction (F) for straightening the metal wire (W) and feeding it out.

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