Clamp and double-station special-shaped lead welding machine using same

Abstract

The invention discloses a clamp and a double-station special-shaped lead welding machine applying the clamp, a plurality of clamps are arranged in the circumferential direction of a rotating disc of the double-station special-shaped lead welding machine, and an upper die special-shaped lead bending mechanism and a lower die special-shaped lead bending mechanism are symmetrically arranged on the two sides of the rotating disc. Welding mechanisms are arranged in gaps between the upper die special-shaped lead bending mechanism and the clamp and between the lower die special-shaped lead bending mechanism and the clamp. Welding guns of the welding mechanisms directly face lead flattening and bending positions of the upper die special-shaped lead bending mechanism and the lower die special-shaped lead bending mechanism. According to the special-shaped lead welding device, special-shaped leads of different shapes can be welded according to needs, and welding of various special-shaped lead capacitors is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitor welding, and particularly relates to a fixture and a double-station special-shaped lead welding machine using the fixture. Background Art

[0002] With the continuous development of the capacitor industry, the capacitor structure has become more and more diversified. Special-shaped lead capacitors can exhibit performance in special environments, while traditional welded lead capacitors cannot meet specific requirements. At present, existing capacitor welding machines can only weld ordinary capacitors and cannot achieve the welding of special-shaped lead capacitors. Summary of the Invention

[0003] In view of this, the present invention provides a fixture and a double-station special-shaped lead welding machine using the fixture to solve the problems existing in the above background art.

[0004] A fixture includes:

[0005] A first fixture housing;

[0006] A fixture driving rack, a fixture driven rack and a fixture gear movably embedded on the first fixture housing;

[0007] An upper clamp hand horizontally fixed on the fixture driving rack;

[0008] A lower clamp hand horizontally fixed on the fixture driven rack;

[0009] A second fixture housing fixed to the first fixture housing through a connecting block;

[0010] And a core limiting plate fixed on the second fixture housing and having one end located between the lower clamp hand and the upper clamp hand to ensure the position accuracy when the core enters the fixture.

[0011] Wherein, the fixture driving rack and the fixture driven rack are both vertically arranged, the fixture gear is arranged between the fixture driving rack and the fixture driven rack and meshes with the fixture driving rack and the fixture driven rack respectively. When the fixture gear rotates, it drives the fixture driving rack and the fixture driven rack to move in opposite directions to open the clamp hands.

[0012] Preferably, a torsion spring seat is further arranged on the outer side of the first fixture housing. The torsion spring seat is fixed to the wheel shaft of the fixture gear, and its torsion spring is fixed to the outer side surface of the first fixture housing.

[0013] Preferably, a clamping tension spring is further arranged on the outer side of the first fixture housing. Both ends of the clamping tension spring are fixed to the fixture driving rack and the outer side surface of the first fixture housing respectively through a first connecting column.

[0014] Preferably, both the lower gripper and the upper gripper include gripper arms and gripper heads fixed to the front ends of the gripper arms.

[0015] Preferably, it further includes a rotary cylinder, a rotary rack disposed above the piston rod of the rotary cylinder, and a rotary gear meshing with the rotary rack. The axle of the rotary gear is fixed to the connecting block. A rotary return spring is also disposed on the outer side of the first fixture housing. Both ends of the rotary return spring are fixed to the rotary rack and the outer side surface of the first fixture housing respectively through second connecting columns.

[0016] A double-station special-shaped lead wire welding machine includes a loading mechanism, an unloading mechanism, a missing material removal mechanism, and a turntable. It also includes an upper die special-shaped lead wire bending mechanism, a lower die special-shaped lead wire bending mechanism, and a plurality of the fixtures. The upper die special-shaped lead wire bending mechanism and the lower die special-shaped lead wire bending mechanism are symmetrically arranged on both sides of the turntable. The plurality of fixtures are evenly arranged in the circumferential direction of the turntable. Welding mechanisms are provided in the gaps between the upper die special-shaped lead wire bending mechanism and the lower die special-shaped lead wire bending mechanism and the fixtures. The welding torches of the welding mechanisms are directed at the lead wire flattening and bending positions of the upper die special-shaped lead wire bending mechanism and the lower die special-shaped lead wire bending mechanism.

[0017] Among them, two groups of flattening and cutting components are symmetrically arranged on the support frames of the upper die special-shaped lead wire bending mechanism and the lower die special-shaped lead wire bending mechanism. A lead wire bending component is provided between the two groups of flattening and cutting components. The lead wire bending component of the upper die special-shaped lead wire bending mechanism squeezes from top to bottom to bend the capacitor lead wire, and the lead wire bending component of the lower die special-shaped lead wire bending mechanism squeezes from bottom to top to bend the capacitor lead wire.

[0018] Preferably, the flattening and cutting component includes a flattening driving element, a connecting joint fixed to the movable end of the flattening driving element, a flattening slider connected to the connecting joint, a special-shaped bending edge die connected to the flattening slider, and a wire cutting knife fixed to one side surface of the special-shaped bending edge die. A sliding seat is also fixed to the top of the support frame, and the flattening slider passes through the sliding seat horizontally.

[0019] Preferably, the lead wire bending component of the upper die special-shaped lead wire bending mechanism includes a bending driving element, a special-shaped upper bending die fixed to the movable end of the bending driving element, a special-shaped middle bending die fixed to the top of the support frame, and special-shaped middle bending die inserts fixed to both end faces of the special-shaped middle bending die facing the special-shaped bending edge die. The movable end of the bending driving element faces downward. The special-shaped upper bending die straddles above the special-shaped middle bending die and can move up and down under the drive of the bending driving element. The lower end face of the special-shaped upper bending die and the upper end face of the special-shaped middle bending die insert are both provided with special-shaped bending surfaces matching the lead wire forming shape. The special-shaped bending edge die can slide towards the special-shaped middle bending die under the drive of the flattening driving element so that its end face contacts the corresponding end face of the special-shaped bending edge die to flatten the lead wire.

[0020] Preferably, the lead bending assembly of the lower die special-shaped lead bending mechanism includes a bending driving element, a special-shaped upper bending die fixed to the movable end of the bending driving element, a special-shaped middle bending die, and special-shaped bending middle die assemblies fixed to both end faces of the special-shaped middle bending die facing the special-shaped bending edge die. The movable end of the bending driving element faces upward. The special-shaped upper bending die is straddled below the special-shaped middle bending die and can move up and down under the drive of the bending driving element. The upper end face of the special-shaped upper bending die and the lower end face of the special-shaped bending middle die assembly are both provided with special-shaped bending surfaces matching the lead forming shape. The special-shaped bending edge die can slide toward the special-shaped middle bending die under the drive of the flattening driving element so that its end face contacts the corresponding end face of the special-shaped bending edge die to flatten the lead.

[0021] Preferably, a first notch is provided at the bottom of the special-shaped bending edge die so that it can slide on the special-shaped bending middle die assembly. A flattening protrusion extends from the end face of the special-shaped bending edge die facing the special-shaped middle bending die. A second notch for fixing a wire cutting knife is provided on the side of the special-shaped bending edge die facing the welding mechanism.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. By fixing a plurality of jigs on the turntable of the welding machine and symmetrically arranging the upper die special-shaped lead bending mechanism and the lower die special-shaped lead bending mechanism on both sides of the turntable, the present invention can weld special-shaped leads of different shapes as needed, realizing the welding of various special-shaped lead capacitors.

[0024] 2. By horizontally fixing the upper clamp on the active rack of the jig and horizontally fixing the lower clamp on the driven rack of the jig, and utilizing the meshing action between the jig gear and the active rack and the driven rack of the jig, when the jig gear rotates, it drives the active rack and the driven rack of the jig to move in opposite directions to open the jig, and the resilient tension of the torsion spring of the torsion spring seat and the clamping tension spring is used to adaptively clamp the capacitor core, realizing the automatic clamping of the capacitor core. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic diagram of a special-shaped lead capacitor.

[0027] Figure 2 It is a structural schematic diagram of a rotatable jig.

[0028] Figure 3 It is a rear view of the rotatable jig.

[0029] Figure 4 It is a schematic structural diagram of a rotatable fixture for removing the second fixture housing.

[0030] Figure 5 It is a schematic diagram of the fixture gripping a special-shaped lead capacitor.

[0031] Figure 6 It is a rear view of a non-rotatable fixture.

[0032] Figure 7 It is a schematic layout diagram of the special-shaped lead bending mechanism of the upper die, the special-shaped lead bending mechanism of the lower die, and the fixture in a double-station special-shaped lead welding machine.

[0033] Figure 8 It is a schematic layout diagram of the special-shaped lead bending mechanism of the upper die, the fixture, and the welding mechanism.

[0034] Figure 9 It is a bending schematic diagram of the lead bending component in the special-shaped lead bending mechanism of the upper die.

[0035] Figure 10 It is a schematic structural diagram of the special-shaped lead bending mechanism of the lower die.

[0036] Figure 11 It is a bending schematic diagram of the lead bending component in the special-shaped lead bending mechanism of the lower die.

[0037] Figure 12 It is a schematic structural diagram of the flattening and cutting component in the special-shaped lead bending mechanism of the upper die or the special-shaped lead bending mechanism of the lower die.

[0038] Figure 13 It is a bottom view schematic diagram of the special-shaped flanging die.

[0039] Figure 14 It is a top view schematic diagram of the special-shaped flanging die.

[0040] The meanings of the reference numerals in the figure are as follows:

[0041] 1 is a capacitor;

[0042] 2 is a fixture, 2-1 is the main fixture rack, 2-2 is the driven fixture rack, 2-3 is the lower gripper, 2-4 is the upper gripper, 2-5 is the core limit plate, 2-6 is the fixture gear, 2-7 is the connecting block, 2-8 is the first fixture housing, 2-9 is the second fixture housing, 2-10 is the torsion spring seat, 2-11 is the clamping tension spring, 2-12 is the first connecting column, 2-13 is the rotary cylinder, 2-14 is the rotary rack, 2-15 is the rotary gear, 2-16 is the rotary return spring, 2-17 is the second connecting column;

[0043] 3 is the upper die special-shaped lead bending mechanism, 3-1 is the flattening driving element, 3-2 is the connecting joint, 3-3 is the flattening slider, 3-4 is the special-shaped flanging die, 3-5 is the wire cutting knife, 3-6 is the sliding seat, 3-7 is the bending driving element, 3-8 is the special-shaped bending middle die, 3-9 is the special-shaped bending middle die assembly, 3-10 is the first notch, 3-11 is the flattening protrusion, 3-12 is the second notch, 3-13 is the special-shaped upper bending die;

[0044] 4 is the turntable;

[0045] 5 is the welding mechanism;

[0046] 6 is the lower die special-shaped lead bending mechanism;

[0047] 7 is the support frame. Specific embodiments

[0048] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be described below through specific embodiments shown in the drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0049] The terms used in this disclosure are only for the purpose of describing specific embodiments and are not intended to limit the disclosure. The singular forms "a", "the" and "that" used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0050] It should be understood that although the terms first, second, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms and cannot be understood as indicating or implying relative importance. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0051] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0052] For a better understanding of the technical solution of the present invention, the present invention will be described in detail below with reference to the drawings.

[0053] The present invention provides a fixture, which includes a first fixture housing 2-8, a fixture driving rack 2-1, a fixture driven rack 2-2, a fixture gear 2-6, a lower gripper 2-4, an upper gripper 2-3, a core limiting plate 2-5, and a second fixture housing 2-9. The second fixture housing 2-9 is fixed to the first fixture housing 2-8 through a connecting block 2-7, thereby enclosing the clamping arms of the fixture driving rack 2-1, the fixture driven rack 2-2, the fixture gear 2-6, the lower gripper 2-4, and the upper gripper 2-3 inside the housing. The clamping heads of the lower gripper 2-4 and the upper gripper 2-3 extend out of the gripper housing to clamp or release the capacitor core under the combined action of the fixture driving rack 2-1, the fixture driven rack 2-2, and the fixture gear 2-6.

[0054] Specifically, a notch is provided on one side surface of the first fixture housing 2-8. The fixture driving rack 2-1, the fixture driven rack 2-2, and the fixture gear 2-6 are respectively and correspondingly installed in the corresponding notches. The fixture driving rack 2-1 and the fixture driven rack 2-2 are both vertically arranged. The fixture gear 2-6 is arranged between the fixture driving rack 2-1 and the fixture driven rack 2-2 and meshes with the fixture driving rack 2-1 and the fixture driven rack 2-2 respectively.

[0055] The upper gripper 2-4 is horizontally fixed on the fixture driving rack 2-1, and the lower gripper 2-3 is horizontally fixed on the fixture driven rack 2-2. When the fixture gear 2-6 rotates, it drives the fixture driving rack 2-1 and the fixture driven rack 2-2 to move in opposite directions, so as to drive the lower gripper 2-4 and the upper gripper 2-3 to move synchronously, enabling the gripper to open or close. For example, when the fixture gear 2-6 rotates clockwise, the fixture driving rack 2-1 moves downward, the fixture driving rack 2-1 drives the upper gripper 2-4 to move downward synchronously, while the fixture driven rack 2-2 moves upward, and the fixture driven rack 2-2 drives the lower gripper 2-4 to move upward synchronously, thereby closing the fixture to clamp the capacitor core.

[0056] The core limiting plate 2-5 is arranged on the outer side of the clamping hand housing. Specifically, the core limiting plate 2-5 is fixed on the second fixture housing 2-9 and one end thereof is located between the lower clamping hand 2-4 and the upper clamping hand 2-3 to ensure the position accuracy when the core enters the fixture. In this embodiment, the core limiting plate 2-5 is L-shaped.

[0057] Preferably, a torsion spring seat 2-10 is further arranged on the outer side of the first fixture housing 2-8. The torsion spring seat 2-10 is fixed to the axle of the fixture gear 2-6, and its torsion spring is fixed to the outer side surface of the first fixture housing 2-8. In the initial state (the clamping hand is closed and the capacitor core is not clamped), the torsion spring is in a free state. When the clamping hand is opened to clamp the capacitor core, the fixture driving rack 2-1 is pushed upward by a driving element such as a cylinder or a hydraulic cylinder (not shown in the figure), so that the clamping hand is opened. At this time, the torsion spring extends. Then, when the piston rod of the driving element such as a cylinder or a hydraulic cylinder contracts and the fixture driving rack 2-1 loses the lifting force of the driving element such as a cylinder or a hydraulic cylinder, the torsion force of the torsion spring is transmitted to the axle of the fixture gear 2-6, causing the fixture driving rack 2-1 to move downward, thereby clamping the capacitor core by the fixture.

[0058] Preferably, a clamping tension spring 2-11 is further arranged on the outer side of the first fixture housing 2-8. Both ends of the clamping tension spring 2-11 are fixed to the fixture driving rack 2-1 and the outer side surface of the first fixture housing 2-8 respectively through the first connecting column 2-12. In the initial state (the clamping hand is closed and the capacitor core is not clamped), the clamping tension spring 2-11 is in a free state. When the clamping hand is opened to clamp the capacitor core, the fixture driving rack 2-1 is pushed upward by a driving element such as a cylinder or a hydraulic cylinder (not shown in the figure), so that the clamping hand is opened. At this time, the clamping tension spring 2-11 extends. Then, when the piston rod of the driving element such as a cylinder or a hydraulic cylinder contracts and the fixture driving rack 2-1 loses the lifting force of the driving element such as a cylinder or a hydraulic cylinder, under the action of the pulling-back elastic force of the clamping tension spring 2-11, the fixture driving rack 2-1 moves downward, thereby clamping the capacitor core by the fixture.

[0059] The function of the above-mentioned clamping tension spring 2-11 is the same as that of the above-mentioned torsion spring seat 2-10, which is used to provide a clamping force to clamp the capacitor core by the fixture. In the actual production process, the torsion spring seat 2-10 or the clamping tension spring 2-11 can be installed on the fixture according to needs.

[0060] Preferably, the fixture further includes a rotary cylinder 2-13, a rotary rack 2-14 disposed above the piston rod of the rotary cylinder 2-13, and a rotary gear 2-15 meshing with the rotary rack 2-14. The axle of the rotary gear 2-15 is fixed to the connecting block 2-7. A rotary return spring 2-16 is further disposed on the outer side of the first fixture housing 2-8. The two ends of the rotary return spring 2-16 are respectively fixed to the rotary rack 2-14 and the outer side surface of the first fixture housing 2-8 through a second connecting column 2-17. When the piston rod of the rotary cylinder 2-13 moves upward to contact the rotary rack 2-14 and pushes the rotary rack 2-14 upward, since the rotary rack 2-14 meshes with the rotary gear 2-15, the rotary gear 2-15 can be rotated axially, and the axle of the rotary gear 2-15 drives the entire fixture to rotate. This rotatable fixture can be installed on different welding machines as required, for example, it can be installed on a single-station special-shaped lead wire welding machine.

[0061] The present invention also provides a double-station special-shaped lead wire welding machine, which includes a loading mechanism, an unloading mechanism, a missing material removal mechanism, and a turntable 4. It further includes an upper die special-shaped lead wire bending mechanism 3, a lower die special-shaped lead wire bending mechanism 6, and a plurality of the fixtures 2 described above.

[0062] The loading mechanism is used to convey and supply capacitor cores.

[0063] The unloading mechanism is used to convey the processed capacitors to subsequent process equipment.

[0064] The missing material removal mechanism is used to remove the capacitors that have not been successfully unloaded on the fixture.

[0065] The turntable 4 is used to fix the fixture and convey the fixture to each station to realize processes such as loading of capacitor cores, welding of cores and lead wires, unloading of capacitors, and removal of capacitors. A plurality of fixtures 2 are evenly arranged in the circumferential direction of the turntable 4.

[0066] The upper die special-shaped lead wire bending mechanism 3 and the lower die special-shaped lead wire bending mechanism 6 are symmetrically arranged on both sides of the turntable 4. Both the upper die special-shaped lead wire bending mechanism 3 and the lower die special-shaped lead wire bending mechanism 6 are used to realize flattening and bending of lead wires. As Figure 1 shown in the figure, the capacitor has upper and lower groups of lead wires. The upper die special-shaped lead wire bending mechanism 3 is used to realize flattening and bending of the upper lead wire, and the lower die special-shaped lead wire bending mechanism 6 is used to realize flattening and bending of the lower lead wire.

[0067] Welding mechanisms 5 are provided in the gaps between the upper die special-shaped lead wire bending mechanism 3 and the lower die special-shaped lead wire bending mechanism 6 and the fixture 2. The welding torches of the welding mechanisms 5 are directed at the flattened and bent parts of the lead wires of the upper die special-shaped lead wire bending mechanism 3 and the lower die special-shaped lead wire bending mechanism 6.

[0068] On the support frames 7 of the upper die special-shaped lead bending mechanism 3 and the lower die special-shaped lead bending mechanism 6, two groups of flattening and cutting components are symmetrically arranged, and a lead bending component is arranged between the two groups of flattening and cutting components. The structures of the flattening and cutting components of the upper die special-shaped lead bending mechanism 3 and the lower die special-shaped lead bending mechanism 6 are the same, but the structures of the lead bending components are slightly different. The lead bending component of the upper die special-shaped lead bending mechanism 3 squeezes from top to bottom to bend the capacitor lead, and the lead bending component of the lower die special-shaped lead bending mechanism 6 squeezes from bottom to top to bend the capacitor lead.

[0069] Specifically, the flattening and cutting component includes a flattening driving element 3-1, a connecting joint 3-2 fixed to the end of the movable end of the flattening driving element 3-1, a flattening slider 3-3 connected to the connecting joint 3-2, a special-shaped bending edge die 3-4 connected to the flattening slider 3-3, and a wire cutting knife 3-5 fixed to one side surface of the special-shaped bending edge die 3-4. A sliding seat 3-6 is also fixed to the top of the support frame 7, and the flattening slider 3-3 horizontally passes through the sliding seat 3-6.

[0070] The lead bending component of the upper die special-shaped lead bending mechanism 3 includes a bending driving element 3-7, a special-shaped upper bending die 3-13 fixed to the movable end of the bending driving element 3-7, a special-shaped middle bending die 3-8 fixed to the top of the support frame 7, and special-shaped bending middle die inserts 3-9 fixed to both end faces of the special-shaped middle bending die 3-8 facing the special-shaped bending edge die 3-4. The movable end of the bending driving element 3-7 faces downward, the special-shaped upper bending die 3-13 straddles above the special-shaped middle bending die 3-8 and can move up and down under the drive of the bending driving element 3-7. The lower end surface of the special-shaped upper bending die 3-13 and the upper end surface of the special-shaped bending middle die inserts 3-9 are both provided with special-shaped bending surfaces matching the lead forming shape. The special-shaped bending edge die 3-4 can slide towards the direction of the special-shaped middle bending die 3-8 under the drive of the flattening driving element 3-1 so that its end surface contacts the corresponding end surface of the special-shaped bending edge die 3-4 to flatten the lead 1-1.

[0071] Since the special-shaped bending middle die inserts 3-9 are fixed to both end faces of the special-shaped middle bending die 3-8, and the special-shaped upper bending die 3-13 is U-shaped, the special-shaped upper bending die 3-13 straddles above the special-shaped middle bending die 3-8, and the thickness of the U-shaped arm of the special-shaped upper bending die 3-13 is less than the thickness of the special-shaped bending middle die inserts 3-9. Therefore, a rectangular lead flattening and bending area is formed among the special-shaped bending middle die inserts 3-9, the special-shaped middle bending die 3-8 and the special-shaped upper bending die 3-13, as Figure 9As shown, when the lead is placed in the lead flattening and bending area, that is, on the upper surface of the special-shaped bending middle die assembly 3-9, the piston rod of the flattening driving element 3-1 extends, thereby driving the flattening slider 3-3 to slide towards the direction of the special-shaped bending middle die 3-8. The flattening slider 3-3 drives the special-shaped bending edge die 3-4 to move synchronously to contact the end face of the special-shaped bending middle die 3-8, squeezing and flattening the lead. At the same time, the cutting knife 3-5 cuts off the lead; then, the bending driving element 3-7 drives the special-shaped upper bending die 3-13 to move downward, and the lower end face of the special-shaped upper bending die 3-13 contacts the upper end face of the special-shaped bending middle die assembly 3-9. Using the shapes of their special-shaped bending surfaces, the flattened lead is squeezed and bent into shape.

[0072] The lead bending assembly of the lower die special-shaped lead bending mechanism 6 includes a bending driving element 3-7, a special-shaped lower bending die 3-13 fixed to the movable end of the bending driving element 3-7, a special-shaped bending middle die 3-8, and a special-shaped bending middle die assembly 3-9 fixed to both end faces of the special-shaped bending middle die 3-8 facing the special-shaped bending edge die 3-4. The movable end of the bending driving element 3-7 faces upward. The special-shaped upper bending die 3-13 is straddled below the special-shaped bending middle die 3-8 and can move up and down under the drive of the bending driving element 3-7. The upper end face of the special-shaped upper bending die 3-13 and the lower end face of the special-shaped bending middle die assembly 3-9 are both set to special-shaped bending surfaces matching the lead forming shape. The special-shaped bending edge die 3-4 can slide towards the special-shaped bending middle die 3-8 under the drive of the flattening driving element 3-1 so that its end face contacts the corresponding end face of the special-shaped bending edge die 3-4 to flatten the lead. Similarly, the flattening driving element 3-1 of the lower die special-shaped lead bending mechanism 6 moves the special-shaped bending edge die 3-4 towards the special-shaped bending middle die 3-8 and contacts the end face of the special-shaped bending middle die 3-8, squeezing and flattening the lead. At the same time, the cutting knife 3-5 cuts off the lead; then, the bending driving element 3-7 drives the special-shaped upper bending die 3-13 to move upward, and the upper end face of the special-shaped upper bending die 3-13 contacts the lower end face of the special-shaped bending middle die assembly 3-9. Using the shapes of their special-shaped bending surfaces, the flattened lead is squeezed and bent into shape.

[0073] In this embodiment, a first notch 3-10 is provided at the bottom of the special-shaped bending edge die 3-4 so that it can slide on the special-shaped bending middle die assembly 3-9. A flattening protrusion 3-11 extends from the end face of the special-shaped bending edge die 3-4 facing the special-shaped bending middle die 3-8. During the flattening operation, the end face of the flattening protrusion 3-11 contacts the end face of the special-shaped bending middle die 3-8. A second notch 3-12 for fixing the wire cutting knife 3-5 is provided on the side of the special-shaped bending edge die 3-4 facing the welding mechanism.

[0074] The welding process steps for welding a capacitor using the double-station special-shaped lead welding machine of the present invention are as follows:

[0075] Step 1: The feeding mechanism conveys and supplies the capacitor cores, and the fixture on the turntable at the feeding station clamps the capacitor cores from the end of the feeding mechanism.

[0076] Step 2: The turntable rotates to transfer the fixture clamping the capacitor core to the welding station where the upper die special-shaped lead bending mechanism 3 is located, aligning the first lead fixing position on the capacitor core with the left and right lead flattening and bending areas on the upper die special-shaped lead bending mechanism 3. When the fixture clamping the capacitor core is transferred to the welding station where the upper die special-shaped lead bending mechanism 3 is located, another fixture on the turntable also just turns to the feeding station to perform the fixture action for the material.

[0077] Then, the flattening driving element 3-1 and the bending driving element 3-7 of the upper die special-shaped lead bending mechanism 3 act in sequence to perform lead flattening and bending.

[0078] Then, the welding mechanism on the side of the upper die special-shaped lead bending mechanism 3 welds and fixes the formed special-shaped lead on the first lead fixing position (i.e., the position below) on the capacitor core.

[0079] Step 3: The turntable continues to rotate to transfer the fixture clamping the unformed capacitor to the welding station where the lower die special-shaped lead bending mechanism 6 is located. Then, the motor or cylinder on the turntable drives the fixture to descend to align the second lead fixing position on the capacitor core with the left and right lead flattening and bending areas on the lower die special-shaped lead bending mechanism 6.

[0080] Then, the flattening driving element 3-1 and the bending driving element 3-7 of the lower die special-shaped lead bending mechanism 6 act in sequence to perform lead flattening and bending.

[0081] Then, the welding mechanism on the side of the lower die special-shaped lead bending mechanism 6 welds and fixes the formed special-shaped lead on the second lead fixing position (i.e., the position above) on the capacitor core, and the capacitor welding is completed.

[0082] Step 4: The turntable continues to rotate to convey the formed capacitor to the discharging station and send it to the discharging mechanism.

[0083] Step 5: The turntable continues to rotate to transfer the fixture to the rejection station to utilize the missing rejection mechanism at this station to reject the capacitors that have not been successfully discharged.

[0084] It should be clear that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

Claims

1. A fixture, characterized in that, Including: The first fixture housing (2-8); The fixture driving rack (2-1), fixture driven rack (2-2) and fixture gear (2-6) movably and embeddedly mounted on the first fixture housing (2-8); The upper gripper (2-4) horizontally fixed on the fixture driving rack (2-1); The lower gripper (2-3) horizontally fixed on the fixture driven rack (2-2); The second fixture housing (2-9) fixed to the first fixture housing (2-8) through a connecting block (2-7); And a core limiting plate (2-5) fixed on the second fixture housing (2-9) and with one end located between the lower gripper (2-4) and the upper gripper (2-3) to ensure the position accuracy when the core enters the fixture; Wherein, the fixture driving rack (2-1) and the fixture driven rack (2-2) are both vertically arranged, the fixture gear (2-6) is arranged between the fixture driving rack (2-1) and the fixture driven rack (2-2) and meshes with the fixture driving rack (2-1) and the fixture driven rack (2-2) respectively. When the fixture gear (2-6) rotates, it drives the fixture driving rack (2-1) and the fixture driven rack (2-2) to move in opposite directions to open the grippers.

2. The fixture according to claim 1, wherein A torsion spring seat (2-10) is further arranged on the outer side of the first fixture housing (2-8). The torsion spring seat (2-10) is fixed to the axle of the fixture gear (2-6), and its torsion spring is fixed to the outer side surface of the first fixture housing (2-8).

3. The fixture according to claim 1, characterized in that, A clamping tension spring (2-11) is further arranged on the outer side of the first fixture housing (2-8). The two ends of the clamping tension spring (2-11) are fixed to the fixture driving rack (2-1) and the outer side surface of the first fixture housing (2-8) respectively through a first connecting column (2-12).

4. The fixture according to claim 1, characterized in that, The lower gripper (2-4) and the upper gripper (2-3) both include a gripper arm and a gripper head fixed at the front end of the gripper arm.

5. The jig according to claim 1, wherein, It further includes a rotary cylinder (2-13), a rotary rack (2-14) arranged above the piston rod of the rotary cylinder (2-13), and a rotary gear (2-15) meshing with the rotary rack (2-14). The axle of the rotary gear (2-15) is fixed to the connecting block (2-7). A rotary return spring (2-16) is further arranged on the outer side of the first fixture housing (2-8). The two ends of the rotary return spring (2-16) are fixed to the rotary rack (2-14) and the outer side surface of the first fixture housing (2-8) respectively through a second connecting column (2-17).

6. A double-station special-shaped lead welding machine, comprising a feeding mechanism, a discharging mechanism, a missing material rejection mechanism and a turntable (4), characterized in that, It further includes an upper die special-shaped lead bending mechanism (3) and a lower die special-shaped lead bending mechanism (6), and a plurality of fixtures (2) as described in any one of claims 1-4. The upper die special-shaped lead bending mechanism (3) and the lower die special-shaped lead bending mechanism (6) are symmetrically arranged on both sides of the turntable (4). A plurality of fixtures (2) are evenly arranged in the circumferential direction of the turntable (4). Welding mechanisms are provided in the gaps between the upper die special-shaped lead bending mechanism (3) and the lower die special-shaped lead bending mechanism (6) and the fixtures (2). The welding torches of the welding mechanisms are facing the lead flattening and bending places of the upper die special-shaped lead bending mechanism (3) and the lower die special-shaped lead bending mechanism (6); Among them, two sets of flattening and cutting components are symmetrically arranged on the support frames (7) of the upper die special-shaped lead bending mechanism (3) and the lower die special-shaped lead bending mechanism (6). A lead bending component is arranged between the two sets of flattening and cutting components. The lead bending component of the upper die special-shaped lead bending mechanism (3) squeezes from top to bottom to bend the capacitor lead, and the lead bending component of the lower die special-shaped lead bending mechanism (6) squeezes from bottom to top to bend the capacitor lead.

7. The double-station special-shaped lead wire welding machine according to claim 6, characterized in that, The flattening and cutting component includes a flattening driving element (3-1), a connecting joint (3-2) fixed at the end of the movable end of the flattening driving element (3-1), a flattening slider (3-3) connected to the connecting joint (3-2), a special-shaped bending edge die (3-4) connected to the flattening slider (3-3), and a wire cutting knife (3-5) fixed on one side surface of the special-shaped bending edge die (3-4). A sliding seat (3-6) is also fixed on the top of the support frame (7), and the flattening slider (3-3) transversely passes through the sliding seat (3-6).

8. The double-station special-shaped lead wire welding machine according to claim 6, wherein, The lead bending component of the upper die special-shaped lead bending mechanism (3) includes a bending driving element (3-7), a special-shaped upper bending die (3-13) fixed at the movable end of the bending driving element (3-7), a special-shaped middle bending die (3-8) fixed on the top of the support frame (7), and special-shaped bending middle die inserts (3-9) fixed on both end faces of the special-shaped middle bending die (3-8) facing the special-shaped bending edge die (3-4). The movable end of the bending driving element (3-7) faces downward. The special-shaped upper bending die (3-13) straddles above the special-shaped middle bending die (3-8) and can move up and down under the drive of the bending driving element (3-7). The lower end face of the special-shaped upper bending die (3-13) and the upper end face of the special-shaped bending middle die inserts (3-9) are both set as special-shaped bending surfaces matching the lead forming shape. The special-shaped bending edge die (3-4) can slide towards the special-shaped middle bending die (3-8) under the drive of the flattening driving element (3-1) so that its end face contacts the corresponding end face of the special-shaped bending edge die (3-4) to flatten the lead.

9. The double-station special-shaped lead wire welding machine according to claim 6, wherein, The lead bending component of the lower die special-shaped lead bending mechanism (6) includes a bending driving element (3-7), a special-shaped upper bending die (3-13) fixed at the movable end of the bending driving element (3-7), a special-shaped middle bending die (3-8), and special-shaped bending middle die inserts (3-9) fixed on both end faces of the special-shaped middle bending die (3-8) facing the special-shaped bending edge die (3-4). The movable end of the bending driving element (3-7) faces upward. The special-shaped upper bending die (3-13) straddles below the special-shaped middle bending die (3-8) and can move up and down under the drive of the bending driving element (3-7). The upper end face of the special-shaped upper bending die (3-13) and the lower end face of the special-shaped bending middle die inserts (3-9) are both set as special-shaped bending surfaces matching the lead forming shape. The special-shaped bending edge die (3-4) can slide towards the special-shaped middle bending die (3-8) under the drive of the flattening driving element (3-1) so that its end face contacts the corresponding end face of the special-shaped bending edge die (3-4) to flatten the lead.

10. The double-station special-shaped lead wire welding machine according to claim 7 or 8 or 9, characterized in that, The bottom of the special-shaped bending edge die (3-4) is provided with a first notch (3-10) so that it can slide on the special-shaped bending middle die assembly (3-9). A flattening protrusion (3-11) extends on the end face of the special-shaped bending edge die (3-4) facing the special-shaped bending middle die (3-8). A second notch (3-12) for fixing the wire cutting knife (3-5) is provided on the side surface of the special-shaped bending edge die (3-4) facing the welding mechanism.

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