Chain cutting and head and tail welding ring machine

Abstract

The utility model discloses a chain cutting and head and tail ring welding machine which comprises a machine frame, the machine frame is provided with a bearing mechanism, a ring manufacturing mechanism, a cutting mechanism capable of cutting off jewelry chains and a welding mechanism capable of welding hanging rings to the ends of the cut jewelry chains. The rack is provided with a first transfer mechanism used for dragging the jewelry chain on the bearing mechanism to reach the cutting mechanism and conveying the cut jewelry chain towards the welding mechanism, and the rack is provided with a second transfer mechanism capable of conveying the hanging ring manufactured by the ring manufacturing mechanism towards the welding mechanism. The first transfer mechanism drags the jewelry chain from the bearing mechanism, after the jewelry chain passes through the cutting mechanism and is dragged in place by the first transfer mechanism, the cutting mechanism cuts off the jewelry chain to obtain the jewelry chain with the preset length, and the two ends, with the preset length, of the jewelry chain of the first transfer mechanism are sequentially aligned with the welding mechanism. The ring making mechanism makes hanging rings, the second transferring mechanism transfers the hanging rings to the position close to the welding mechanism, and the welding mechanism welds the hanging rings to the two ends of the jewelry chain.

Description

Technical Field

[0001] This utility model relates to the technical field of jewelry chain processing equipment, specifically to a chain cutting and welding head and tail ring machine. Background Technology

[0002] Jewelry chains, including bracelets worn on the wrist and necklaces worn around the neck, satisfy people's feelings and pursuit of beauty. The common structure of a jewelry chain includes a chain body and decorative elements strung on the chain body, with several decorative elements arranged at intervals. To meet consumers' aesthetic needs, a jewelry chain has been developed with hanging loops fixed at the head and tail ends along its length. In actual production, if the hanging loops are welded onto the cut jewelry chains manually, it is difficult to guarantee welding quality and is time-consuming and labor-intensive, as most jewelry chains are thin and the hanging loops are small. There is an urgent need for a chain cutting and welding machine that can automatically produce jewelry chains of preset lengths and weld hanging loops to both ends of the chains. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a chain cutting and welding machine that can automatically produce jewelry chains of a preset length and weld hanging rings to both ends of the jewelry chain.

[0004] To solve the above-mentioned technical problems, this utility model includes a frame, which is equipped with a carrying mechanism for carrying jewelry chains. Its structural features are: the frame is equipped with a ring-making mechanism for making hanging rings; the frame is equipped with a cutting mechanism for cutting the jewelry chain; the frame is equipped with a welding mechanism for welding hanging rings to the ends of the jewelry chain; the frame is equipped with a first transfer mechanism for pulling the jewelry chain on the carrying mechanism to the cutting mechanism and conveying the cut jewelry chain toward the welding mechanism; and the frame is equipped with a second transfer mechanism for conveying the hanging rings made by the ring-making mechanism toward the welding mechanism. The first transfer mechanism can sequentially align the two ends of the cut jewelry chain with the welding mechanism.

[0005] With the above structure, the first transfer mechanism pulls the jewelry chain from the carrying mechanism. After the jewelry chain passes the cutting mechanism and is pulled into place by the first transfer mechanism, the cutting mechanism cuts the jewelry chain to obtain a jewelry chain of a preset length. The first transfer mechanism aligns the two ends of the jewelry chain of the preset length with the welding mechanism. The ring-making mechanism produces hanging rings, and the second transfer mechanism transfers the hanging rings to a position close to the welding mechanism, where the welding mechanism welds the hanging rings to both ends of the jewelry chain. The ring-making mechanism, cutting mechanism, welding mechanism, first transfer mechanism, and second transfer mechanism operate in a cycle, thereby automatically producing jewelry chains of the preset length and welding hanging rings to both ends of the jewelry chains, improving the efficiency of chain cutting and ring welding operations, and achieving high-efficiency production of the product.

[0006] Furthermore, the ring-making mechanism includes a supporting section, a forming section, and a transfer section. The supporting section carries the metal wire used as the ring-making material. The forming section cuts the metal wire and extrudes the cut metal wire into shape. The transfer section transports the metal wire from the supporting section toward the forming section. By setting up the supporting section, forming section, and transfer section, the supporting section places and carries the metal wire used as the ring-making material. After the transfer section transports the metal wire of the required length for ring-making to the forming section, the forming section cuts and shapes the metal wire, thus realizing automated production of rings and highly efficient ring-making.

[0007] Furthermore, the forming part includes a forming support, which is hinged to two forming clamps. The upper part of the forming clamps is provided with forming grooves, and the forming grooves on the two forming clamps are symmetrically arranged. The upper part of the forming grooves can receive the metal wire from the transfer part. The upper parts of the two forming clamps can move closer to each other and further away. The forming support is provided with a forming sliding frame that can move up and down. The forming sliding frame is provided with a forming mandrel that can reciprocate linearly along its own axis. The forming mandrel is located between the upper parts of the two forming clamps. The forming support is provided with a first cutter that can move up and down to cut the metal wire from the transfer part. The forming support is provided with a forming pressure knife that can move up and down and whose bottom end is located above the forming mandrel. By setting up a forming section, when the transfer section feeds the metal wire to the upper part of the forming groove, the first cutter cuts the metal wire, and the forming sliding frame moves down to bring the forming mandrel down to contact the metal wire. The forming mandrel bends the metal wire downwards. Then, the upper parts of the two forming clamps move closer to each other, and the two sides of the downward-bent metal wire are bent inwards through the forming groove. Finally, the forming pressure knife moves downwards and presses down on the two ends of the bent metal wire to prevent the two ends of the bent metal wire from curling upwards, ensuring the circular shape of the hanging ring. The formed hanging ring is threaded onto the forming mandrel. The forming mandrel moves outwards along the axis, and the hanging ring on the forming mandrel also moves outwards, realizing the displacement of the hanging ring. This facilitates the second transfer mechanism to pick up the transfer hanging ring and prevents interference between the second transfer mechanism and the forming clamps or forming pressure knife when picking up the transfer hanging ring.

[0008] Furthermore, the first transfer mechanism includes a pressing device mounted on a frame for restricting the movement of the jewelry chain from the carrying mechanism. The frame is equipped with a first feeding device, a second feeding device, and a third feeding device capable of clamping and releasing the jewelry chain. The first or third feeding device clamps the end of the jewelry chain that has passed through the pressing device and pulls it toward the welding mechanism. The cutting mechanism can cut the jewelry chain that has been pulled into place by the first or third feeding device. The second feeding device can clamp the jewelry chain near the cut point before the cutting mechanism cuts the jewelry chain. The second feeding device can transport the cut end of the jewelry chain with a preset length near the cut point to the welding mechanism. The third or first feeding device can clamp the jewelry chain near the cut point that has passed through the pressing device before the cutting mechanism cuts the jewelry chain. The third or first feeding device can pull the cut end of the jewelry chain near the cut point that has passed through the pressing device toward the welding mechanism after the cutting mechanism cuts the jewelry chain. By setting up a first transfer mechanism, the jewelry chain to be cut, as material, passes through the pressing device. The pressing device ensures the accuracy of the jewelry chain's position when pulled by the first or third chain feeding device, preventing the jewelry chain from shifting. Before the cutting mechanism cuts the jewelry chain, the first or third chain feeding device clamps the end of the jewelry chain that has passed through the pressing device and pulls it into position. The third or first and second chain feeding devices then clamp the jewelry chain again. Then, the cutting mechanism cuts the jewelry chain to obtain a jewelry chain of a preset length. The first or third and second chain feeding devices clamp both ends of the jewelry chain with the preset length, ensuring the posture of the jewelry chain with the preset length before welding the hanging ring. After the jewelry chain, as material, is cut by the pressing device, the third or first chain feeding device clamps the newly formed end of the jewelry chain, ensuring the posture of the jewelry chain as material and facilitating subsequent pulling. The first and third chain feeding devices work in alternating pairs to continuously clamp and pull the jewelry chain. The first or third feeding device first pulls the end of the jewelry chain, and after cutting, it pulls the newly formed end. The first or third feeding device then returns to its original position, resulting in a fast production rhythm and high efficiency. The first, second, and third feeding devices clamp the jewelry chain at three points, ensuring the stability of the cut chain to a predetermined length, guaranteeing efficient production. After welding the hanging ring to the end of the jewelry chain held by the first or third feeding device, the second feeding device conveys the other end of the chain to the welding mechanism, thus completing the welding of hanging rings to both ends of the chain.

[0009] Furthermore, the pressing device includes a movable clamp slidably connected to the frame and a fixed clamp fixedly connected to the frame. The frame is provided with an elastic element that provides an elastic thrust to the movable clamp in the direction of the fixed clamp. The movable clamp and the fixed clamp can accommodate a jewelry chain from the supporting mechanism. The frame is rotatably connected to a pressing wheel. The pressing wheel has an inwardly recessed relief groove in its center to abut the jewelry chain. The pressing wheel is located between the movable clamp and the cutting mechanism in the direction of jewelry chain movement. The axis of the pressing wheel extends perpendicularly to the direction of movement of the jewelry chain when it is pulled by the first or third chain feeding device. By setting up the pressing device, the movable clamp and the fixed clamp can clamp the jewelry chain, preventing the jewelry chain from shifting, moving backward, or moving forward. The elastic element provides elastic pressure to the jewelry chain through the movable clamp, which can prevent the jewelry chain from being damaged due to excessive compression, and also prevent the jewelry chain from being broken due to excessive compression when the first or third chain feeding device pulls the jewelry chain. By setting a pressure wheel, the pressure wheel prevents the jewelry chain from tilting upwards. The rotatable pressure wheel reduces friction between the pressure wheel and the jewelry chain, thereby reducing wear on the jewelry chain.

[0010] Furthermore, the cutting mechanism includes two blade holders that can move closer to or further away from each other. Each blade holder is equipped with a second cutting blade, and the two second cutting blades are symmetrically arranged about the direction of movement of the blade holders. By setting up the cutting mechanism, the two blade holders move closer to each other, causing the two second cutting blades to move closer together, thereby completing the cutting of the jewelry chain.

[0011] Furthermore, the first chain feeding device includes a first sliding frame that can move closer to the wire pressing device and further away from the welding mechanism, and a first sliding frame that can move closer to the welding mechanism and further away from the wire pressing device. The first sliding frame is equipped with a second sliding frame that can move up and down, and the second sliding frame is equipped with a first clamp for holding the jewelry chain. By setting up the first chain feeding device, the movement of the first sliding frame causes the second sliding frame and the first clamp to move closer to and further away from the wire pressing device and the welding mechanism. The second sliding frame causes the first clamp to move closer to and further away from the cutting mechanism and the welding mechanism in the vertical direction, preventing the first clamp from interfering with the cutting mechanism and ensuring accurate clamping of the end of the jewelry chain.

[0012] Furthermore, the second chain feeding device includes a third sliding frame that can move closer to the cutting mechanism and further away from the welding mechanism, and also closer to the welding mechanism and further away from the cutting mechanism. The third sliding frame is equipped with a mounting frame, and the mounting frame is rotatably connected to a second clamp for holding the jewelry chain. The mounting frame is equipped with a first power component for driving the second clamp to rotate. By setting up the second chain feeding device, the movement of the third sliding frame causes the mounting frame, the second clamp, and the first power component to move closer to and further away from the cutting mechanism and the welding mechanism. By setting up the second chain feeding device, after the cutting mechanism cuts the jewelry chain, since the second clamp holds one end of the jewelry chain with a preset length, after the second clamp moves closer to the welding mechanism via the second sliding frame, the first power component drives the second clamp to rotate, so that the end of the jewelry chain with a preset length held by the second clamp can move closer to the welding mechanism.

[0013] Furthermore, the transfer unit includes a guide rail mounted on a frame, with a slide block slidably connected to the guide rail. The slide block can move closer to the support unit and further away from the forming unit, and vice versa, by sliding along the guide rail. The slide block has a mounting chamber, and a first clamping body is fixedly connected to the slide block within the mounting chamber. The top of the first clamping body has a downwardly recessed first groove for accommodating a jewelry chain, and the first clamping body has a vertically penetrating first insertion hole. A second clamping body is slidably connected to the slide block within the mounting chamber and above the first clamping body. The bottom of the second clamping body has an upwardly recessed second groove for accommodating a jewelry chain. The first insertion hole... A limiting rod is inserted into the hole. The second clamping body has a second through hole. The upper part of the limiting rod is clearance-fitted with the second through hole. The first groove and the second groove are vertically corresponding. The slide is equipped with a second power component. The second power component has an output end that can press down on the second clamping body. The frame is fixedly connected to a third clamping body and a fourth clamping body. The fourth clamping body is located above the third clamping body. The third clamping body is located between the slide and the forming part in the sliding direction. The fourth clamping body has an upwardly recessed third groove. After the third clamping body and the third groove clamp the metal wire, they can apply pressure towards the inside of the metal wire. By setting up a transfer part, the operator passes the metal wire, which is used as the hanging ring material, between the unloaded first clamping body and the second clamping body, and between the third clamping body and the fourth clamping body, so that the metal wire abuts against the first groove, the second groove, and the third groove. The first groove and the second groove limit the metal wire and prevent the metal wire from deviating in direction during transportation. The third clamping body and the third groove clamp the metal wire. The third groove further ensures the positional accuracy of the metal wire during transportation. When it is necessary to feed the metal wire to the forming section, the second power member presses down on the second clamp, which securely holds the metal wire. The first and second grooves also maintain the shape of the metal wire, preventing it from being flattened and providing a straightening effect. The slide moves from a position near the support section to a position near the forming section. The first and second clamps move while holding the metal wire, and the portion of the metal wire located within the third and fourth clamps also moves towards the forming section. The metal wire moves until one end protrudes from the third and fourth clamps by a predetermined length, thus completing the directional feeding of the metal wire required for forming the hanging ring. When feeding is complete, the second power member releases the pressure on the second clamp, and the slide moves in the opposite direction, causing the first and second clamps to return to their positions near the support section. When the first and second clamps return to their original positions, the second power component releases the pressure on the second clamp, preventing the metal wire from being clamped and returning to its original position. The metal wire is continuously clamped by the third and fourth clamps, and the metal wire remains basically stationary when the first and second clamps return to their original positions. The third and fourth clamps prevent the metal wire from slipping back when the first and second clamps return to their original positions.

[0014] Furthermore, the slide and the frame are each equipped with a tie rod, and two tie rods are fitted with tension springs. The frame is hinged with a swing arm that can reciprocate and abut against the slide. The swing arm drives the slide away from the support part and towards the forming part by swinging. The slide is then driven by the tension spring to return to its original position and move away from the support part and away from the forming part. By setting the tie rod, tension spring, and swing arm, the swing arm drives the slide away from the support part and towards the forming part, thereby causing the first clamp and the second clamp to move away from the support part and towards the forming part, and the tension spring is stretched. When the swing arm swings back, the return action of the tension spring causes the slide to move away from the forming part and towards the support part, thereby causing the first clamp and the second clamp to move away from the forming part and towards the support part, thus achieving the return to the original position.

[0015] In summary, this utility model has the advantages of reasonable structure and convenient use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a top view of the structure of this utility model;

[0018] Figure 3 It is a three-dimensional structural diagram of the frame, bearing section, forming section, and transfer section;

[0019] Figure 4 yes Figure 3 Enlarged view of a portion of area A in the middle;

[0020] Figure 5 This is a three-dimensional structural diagram of the forming clamp;

[0021] Figure 6 yes Figure 5 Enlarged view of a section in area B;

[0022] Figure 7 This is a structural diagram of the frame, transfer unit, and tie rod;

[0023] Figure 8 yes Figure 7 A magnified view of a section in area C;

[0024] Figure 9 This is a schematic diagram of the slide block structure;

[0025] Figure 10 This is a structural diagram illustrating the explosion effects of the first and second clamping bodies.

[0026] Figure 11 yes Figure 10 A structural diagram from another angle;

[0027] Figure 12This is a structural diagram illustrating the explosion effects of the third and fourth clamping bodies;

[0028] Figure 13 It is a structural diagram of the frame, the load-bearing mechanism, the cutting mechanism, and the wire pressing device;

[0029] Figure 14 yes Figure 13 Enlarged view of a section in area D;

[0030] Figure 15 This is a schematic diagram of the sprocket mechanism;

[0031] Figure 16 This is a structural diagram of the frame and tool holder;

[0032] Figure 17 yes Figure 16 A magnified view of a section in area E;

[0033] Figure 18 This is a structural diagram of the frame, cutting mechanism, first chain feeding device, second chain feeding device and third chain feeding device;

[0034] Figure 19 yes Figure 18 Enlarged view of a section in the F region;

[0035] Figure 20 This is a structural diagram of the frame and the second chain feeding device;

[0036] Figure 21 This is a simplified flowchart of the workflow of the forming clamp, forming mandrel, first cutter, and forming pressure knife;

[0037] Figure 22 This is a schematic diagram showing the state of the jewelry chain being held by part of the first clamp, part of the second clamp, and part of the third chain feeding device.

[0038] Figure 23 yes Figure 22 A magnified view of a section in the G region;

[0039] In the diagram: 1. Frame; 2. Bearing mechanism; 3. Coil-making mechanism; 31. Bearing section; 311. Pay-off reel; 312. Straightener; 32. Forming section; 321. Forming bracket; 322. Forming clamp; 3221. Forming groove; 323. Forming sliding frame; 324. Forming mandrel; 325. First cutter; 326. Forming pressure knife; 33. Transfer section; 331. Guide rail; 332. Slide; 3321. Mounting chamber; 333. First clamping body; 3331. First groove; 3332. First insertion hole; 334. Second clamping body; 3341. Second groove; 3342. Second insertion hole; 335. Second power component; 336. Third clamping body; 337. Fourth clamping body; 3371. Third groove; 4. Cutting mechanism; 41. Knife holder; 42. Second cutter; 5. Welding mechanism; 6. First transfer mechanism; 61. Wire pressing device; 611. Movable clamp; 612. Fixed clamp; 613. Elastic element; 614. Sprocket; 6141. Clearance groove; 62. First chain feeding device; 621. First sliding frame; 622. Second sliding frame; 623. First clamp; 63. Second chain feeding device; 631. Third sliding frame; 632. Mounting frame; 633. Second clamp; 634. First power element; 64. Third chain feeding device; 7. Second transfer mechanism; 71. First rotary transfer device; 72. Second rotary transfer device; 8. Pull rod; 9. Swing rod. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention. For ease of understanding, Figure 2 The top is the front side of this utility model. Figure 2 The bottom is the rear side of this utility model. Figure 2 The left side is the left side of this utility model. Figure 2 The right side is the right side of this utility model. Figure 3 The upper side is the upper side of this utility model. Figure 3 The lower side is the lower side of this utility model.

[0041] Reference Figure 1 , Figure 2 and Figure 18This utility model includes a frame 1. The frame 1 is equipped with a carrying mechanism 2 for carrying jewelry chains. The carrying mechanism 2 includes a carrying shaft rotatably connected to the frame 1 for carrying the jewelry chain stored in a disc shape. The carrying shaft is inserted into the middle of the disc-shaped jewelry chain. The frame 1 drives the carrying shaft to rotate via a synchronous pulley and belt mechanism driven by a motor. When the jewelry chain is being transported, the rotation of the carrying shaft causes the disc-shaped jewelry chain to rotate, preventing thinner jewelry chains from being broken due to the weight of the disc-shaped chain during transport. The frame 1 is equipped with a ring-making mechanism 3 for making hanging rings. The frame 1 is equipped with a cutting mechanism 4 for cutting the jewelry chain. The frame 1 is equipped with a welding mechanism 5 for welding hanging rings to the ends of the jewelry chain. The frame 1 is equipped with a first transfer mechanism 6 for pulling the jewelry chain on the carrying mechanism 2 to the cutting mechanism 4 and transporting the cut jewelry chain toward the welding mechanism 5. The frame 1 is equipped with a second transfer mechanism 7 for transporting the hanging rings made by the ring-making mechanism 3 toward the welding mechanism 5. The first transfer mechanism 6 can align the two ends of the cut jewelry chain sequentially with the welding mechanism 5.

[0042] Reference Figures 1 to 12 and Figure 21 The ring-making mechanism 3 includes a carrying section 31, a forming section 32, and a transfer section 33. The carrying section 31 carries the metal wire used as the ring-making material. The forming section 32 cuts the metal wire and extrudes the cut metal wire into shape. The transfer section 33 transports the metal wire from the carrying section 31 toward the forming section 32. The carrying section 31 holds and carries the metal wire used as the ring-making material. After the transfer section 33 transports the metal wire of the required length to the forming section 32, the forming section 32 cuts and shapes the metal wire, realizing automated production of the rings and high-efficiency ring-making. The carrying section 31 includes a feed wheel 311 rotatably connected to the frame 1. The metal wire used as the ring-making material is wound around the feed wheel 311. The frame 1 is equipped with a straightener 312 for straightening the metal wire from the feed wheel 311. The carrying section 31, the transfer section 33, and the forming section 32 are arranged sequentially on the frame 1 in a left-right direction.

[0043] Reference Figures 1 to 12 and Figure 21The forming section 32 includes a forming support 321 mounted on the frame 1. Two forming clamps 322 are hinged to the forming support 321. Each forming clamp 322 has a forming groove 3221 on its upper part. The forming grooves 3221 on the two forming clamps 322 are symmetrically arranged. In this embodiment, the two forming grooves 3221 are left-right symmetrical. The upper part of the forming groove 3221 can receive the metal wire from the transfer section 33, and the lower part of the forming groove 3221 is used to press and bend the metal wire inwards on both sides. The upper part of the forming groove 3221 is an arc-shaped groove protruding outwards from the forming clamp 322, and the lower part of the forming groove 3221 is an arc-shaped groove recessed inwards from the forming clamp 322. The upper parts of the two forming clamps 322 can move closer to or further away from each other. The forming support 321 is equipped with a forming slide frame 323 that can move up and down. The forming slide frame 323 is equipped with a forming mandrel 324 that can reciprocate linearly along its own axis. The forming mandrel 324 is located between the upper parts of two forming clamps 322. The forming support 321 is equipped with a first cutter 325 that can move up and down and cuts the metal wire from the transfer unit 33. The forming support 321 is equipped with a forming pressure knife 326 that can move up and down and whose bottom end is located above the forming mandrel 324.

[0044] When the transfer unit 33 feeds the metal wire to the upper part of the forming groove 3221, the first cutter 325 cuts the metal wire, as shown in the figure. Figure 21 Parts a1 and a2. The forming slide frame 323 moves downwards, causing the forming mandrel 324 to move downwards until it contacts the metal wire. The forming mandrel 324 then bends the metal wire downwards. (Refer to...) Figure 21 Parts a2 and a3. Then, the upper parts of the two forming clamps 322 are brought close together, and the two sides of the downward-bent metal wire are bent inward through the forming groove 3221, as shown in the reference. Figure 21 Part a4. Finally, the forming pressure knife 326 moves downward, pressing down on both ends of the bent metal wire to prevent the ends of the bent metal wire from curling upward, ensuring the circular shape of the hanging ring. (Refer to...) Figure 21 Part A5. The formed hanging ring is threaded onto the forming mandrel 324. As the forming mandrel 324 moves outward along its axis, the hanging ring on it also moves outward, thus shifting the hanging ring. This facilitates the second transfer mechanism 7 in picking up the transfer hanging ring and prevents interference between the second transfer mechanism 7 and the forming clamp 322 or forming pressure knife 326 when picking up the transfer hanging ring. (Refer to...) Figure 21 Part A6.

[0045] Reference Figures 1 to 12 and Figure 21The transfer unit 33 includes a guide rail 331 mounted on the frame 1, and a slide block 332 slidably connected to the guide rail 331. The guide rail 331 is arranged horizontally in the left-right direction. The slide block 332 can move closer to the support unit 31 and away from the forming unit 32, and vice versa, by sliding on the guide rail 331. The slide block 332 is provided with a mounting chamber 3321, and a first clamping body 333 located in the mounting chamber 3321 is fixedly connected to the slide block 332. The top of the first clamping body 333 is provided with a downwardly recessed first groove 3331 for accommodating the jewelry chain. The first groove 3331 is a downwardly recessed arc-shaped groove. The first clamping body 333 is provided with a first insertion hole 3332 that extends vertically. A slide block 332 slidably connects to a second clamping body 334 located within the mounting chamber 3321 and above the first clamping body 333. The bottom end of the second clamping body 334 has an upwardly recessed second groove 3341 for accommodating a jewelry chain; the second groove 3341 is an upwardly recessed arc-shaped groove. The second clamping body 334 can move up and down within the mounting chamber 3321. A limiting rod (not shown in the figure) is inserted into the first insertion hole 3332. The second clamping body 334 has a vertically penetrating second insertion hole 3342, with the upper part of the limiting rod fitting loosely into the second insertion hole 3342. The first groove 3331 and the second groove 3341 correspond vertically. The slide block 332 is equipped with a second power component 335, which has an output end capable of pressing the second clamping body 334 downwards. The second power component 335 can be a cylinder. The frame 1 is fixedly connected with a third clamping body 336 and a fourth clamping body 337. The fourth clamping body 337 is located above the third clamping body 336. The third clamping body 336 is located between the slide 332 and the forming part 32 in the moving direction of the slide 332. The fourth clamping body 337 is provided with an upwardly recessed third groove 3371. After the third clamping body 336 and the third groove 3371 clamp the metal wire, they can apply pressure toward the inside of the metal wire.

[0046] When the transfer unit 33 is in use, the operator inserts the metal wire, which is used as the hanging ring material, between the unloaded first clamp 333 and the second clamp 334, the third clamp 336 and the fourth clamp 337, so that the metal wire abuts against the first groove 3331, the second groove 3341 and the third groove 3371. The first groove 3331 and the second groove 3341 limit the metal wire to prevent it from deviating in direction during the conveying process. The third clamp 336 and the third groove 3371 clamp the metal wire, and the third groove 3371 further ensures the positional accuracy of the metal wire during the conveying process. When it is necessary to feed the metal wire to the forming section 32, the second power member 335 presses down on the second clamping body 334, which securely abuts against the metal wire. The first groove 3331 and the second groove 3341 also maintain the shape of the metal wire, preventing it from being flattened and providing a straightening effect. The slide 332 slides from a position near the bearing section 31 to a position near the forming section 32. The first clamping body 333 and the second clamping body 334 move while clamping the metal wire. The portion of the metal wire located within the third clamping body 336 and the fourth clamping body 337 also moves towards the forming section 32. The metal wire moves until one end protrudes from the third clamping body 336 and the fourth clamping body 337 by a predetermined length, thereby completing the directional feeding of the metal wire required for forming the hanging ring. When feeding is complete, the second power member 335 releases the pressure on the second clamping body 334, and the slide 332 moves in the opposite direction. The first clamping body 333 and the second clamping body 334 return to their positions near the bearing section 31. When the first clamp 333 and the second clamp 334 return to their original positions, the second power component 335 releases pressure on the second clamp 334, preventing the metal wire from being clamped during the return of the first clamp 333 and the second clamp 334. The metal wire is continuously clamped by the third clamp 336 and the fourth clamp 337, and the metal wire remains essentially stationary when the first clamp 333 and the second clamp 334 return to their original positions. The third clamp 336 and the fourth clamp 337 prevent the metal wire from slipping back during the return of the first clamp 333 and the second clamp 334. The third clamp 336 and the fourth clamp 337 provide slight clamping to the metal wire, ensuring both smooth wire feeding and reliable clamping of the metal wire.

[0047] Reference Figures 1 to 12The slide 332 and the frame 1 are each provided with a pull rod 8. Two pull rods 8 are fitted with tension springs (not shown in the figure). The frame 1 is hinged with a swing rod 9 that can reciprocate and rest against the slide 332. The swing rod 9 drives the slide 332 away from the support part 31 and closer to the forming part 32 by swinging. The slide 332 is then driven back towards the support part 31 and away from the forming part 32 by the tension spring. When the swing rod 9 swings, it drives the slide 332 away from the support part 31 and closer to the forming part 32, thereby causing the first clamping body 333 and the second clamping body 334 to move away from the support part 31 and closer to the forming part 32, stretching the tension spring. When the swing rod 9 swings back, the tension spring's return action causes the slide 332 to move away from the forming part 32 and closer to the support part 31, thereby causing the first clamping body 333 and the second clamping body 334 to move away from the forming part 32 and closer to the support part 31, achieving a return to its original position.

[0048] In this embodiment, a camshaft is rotatably connected to the frame 1. The camshaft has several cams, and the frame 1 is equipped with a motor for driving the camshaft to rotate. The rocker arm 9 reciprocates through a cam and a rocker arm assembly that cooperates with the cam. The frame 1 is equipped with a pin that can move up and down. The tip of the pin is a pointed tip, which is used to extend into and contact the lower part of two forming clamps 322. The middle parts of the two forming clamps 322 are elastically connected by a tension spring. When the pin moves upward, the distance between the lower parts of the two forming clamps 322 increases, the distance between the upper parts decreases, and the tension spring is stretched, allowing the upper parts of the two forming clamps 322 to move closer to each other. When the pin moves downward, the distance between the lower parts of the two forming clamps 322 decreases, the tension spring rebounds, and the distance between the upper parts of the forming clamps 322 increases, allowing the upper parts of the two forming clamps 322 to move away from each other. The up and down movement of the pin is achieved through a cam and a rocker arm assembly that cooperates with the cam, thereby realizing the movement of the upper parts of the two forming clamps 322 closer to each other and further away. The forming slide frame 323 is elastically connected to the frame 1 via a compression spring. The forming slide frame 323 moves up and down via a cam, a rocker arm assembly that cooperates with the cam, and the compression spring. When the cam and rocker arm assembly drive the forming slide frame 323 downwards, the compression spring is compressed. The spring's return action causes the forming slide frame 323 to move upwards. The forming mandrel 324 reciprocates linearly along its own axis via a cam and a rocker arm assembly that cooperates with the cam. The forming mandrel 324 can be equipped with a fixture that maintains continuous contact with the rocker arm assembly to prevent it from disengaging from the rocker arm assembly when the forming slide frame 323 moves up and down. In this embodiment, the forming mandrel 324 can move back and forth. A cutting blade holder is slidably connected to the forming bracket 321. The cutting blade holder is elastically connected to the frame 1 via a compression spring. A first cutting blade 325 is fixedly connected to the cutting blade holder. The cutting blade holder moves up and down via a cam, a rocker arm assembly that cooperates with the cam, and a compression spring, allowing the first cutting blade 325 to move up and down and cut the metal wire from the transfer unit 33. A pressure blade holder is slidably connected to the forming bracket 321. The pressure blade holder is elastically connected to the frame 1 via a compression spring. A forming pressure blade 326 is fixedly connected to the pressure blade holder. The pressure blade holder moves up and down via a cam, a rocker arm assembly that cooperates with the cam, and a compression spring, allowing the forming pressure blade 326 to move up and down. The bottom end of the forming pressure blade 326 has a downwardly convex arc shape. This cam-rocker arm drive structure saves the overall footprint of the working parts, resulting in a compact structure; it has low error after long-term continuous operation, achieving precise drive; it has low production cost and is easy to maintain later. Of course, several linear cylinders can be used to drive the linear movement of the above-mentioned working parts, and several rotary cylinders can be used to drive the rotary movement of the above-mentioned working parts. However, using cylinders would be more expensive and more complicated to maintain later.

[0049] Reference Figure 1 , Figure 2 , Figure 18 , Figure 22 , Figure 23The cutting mechanism 4 includes two blade holders 41 that can move closer to or further away from each other. Each blade holder 41 is equipped with a second cutting blade 42, and the two second cutting blades 42 are symmetrically arranged about the moving direction of the blade holders 41. In this embodiment, the sliding direction of the blade holders 41 is horizontal, and the two second cutting blades 42 are symmetrically arranged about the left and right directions. The frame 1 is equipped with a slide cylinder whose output end can slide up and down. A drive plate is fixedly mounted on the output end of the slide cylinder. The drive plate is generally Y-shaped, but can also be other shapes. The drive plate has two drive elongated holes, and the length extension direction of the drive elongated holes forms an acute angle with the vertical direction. The frame 1 is equipped with two slider guide rail mechanisms. The guide rails in the slider guide rail mechanisms are arranged horizontally about the left and right directions on the frame 1. The blade holders 41 are connected to the sliders in the slider guide rail mechanisms, and the blade holders 41 are rotatably connected to rollers that can abut against the drive elongated holes. When the drive plate moves up and down, it drives the rollers to roll through the drive elongated hole, causing the two second cutters 42 to move closer and further apart via the two slider guide mechanisms. The two cutter holders 41 move closer together, causing the two second cutters 42 to move closer together, thus completing the cutting of the jewelry chain. The frame 1 may be equipped with a sensor, which is controlled and connected to the slide cylinder. The sensor is used to detect that the cut point of the jewelry chain by the second cutter 42 is located on the chain between two decorative pieces. The welding mechanism 5 is a common component in the field of jewelry welding equipment, and its structural principle is well known to those skilled in the art and will not be described further here.

[0050] Reference Figures 1 to 3 , Figures 13 to 20 , Figure 22 , Figure 23 The first transfer mechanism 6 includes a wire pressing device 61 mounted on the frame 1 for limiting the movement of the jewelry chain from the carrying mechanism 2. The frame 1 is equipped with a first chain feeding device 62, a second chain feeding device 63, and a third chain feeding device 64 capable of clamping and releasing the jewelry chain. The first chain feeding device 62 or the third chain feeding device 64 clamps the end of the jewelry chain passing through the wire pressing device 61 and pulls it toward the welding mechanism 5. The cutting mechanism 4 can cut the jewelry chain pulled into place by the first chain feeding device 62 or the third chain feeding device 64. The second chain feeding device 63 can clamp the jewelry chain near the cutting point before the cutting mechanism 4 cuts the jewelry chain, and the second chain feeding device 63 can transport the cut end of the jewelry chain with a preset length near the cutting point to the welding mechanism 5. The third chain feeding device 64 or the first chain feeding device 62 can clamp the jewelry chain near the cut point after passing through the pressing device 61 before the cutting mechanism 4 cuts the jewelry chain. After the cutting mechanism 4 cuts the jewelry chain, the third chain feeding device 64 or the first chain feeding device 62 can pull the end of the jewelry chain near the cut point after passing through the pressing device 61 to the welding mechanism 5.

[0051] As material, the jewelry chain to be cut passes through the pressing device 61. The pressing device 61 ensures the accuracy of the jewelry chain's position when it is pulled by the first feeding device 62 or the third feeding device 64, preventing the jewelry chain from shifting. Before the cutting mechanism 4 cuts the jewelry chain, the first feeding device 62 or the third feeding device 64 clamps the end of the jewelry chain that has passed through the pressing device 61 and pulls it into position. The third feeding device 64 or the first feeding device 62 and the second feeding device 63 then clamps the jewelry chain. Then the cutting mechanism 4 cuts the jewelry chain to obtain a jewelry chain of the preset length. The first feeding device 62 or the third feeding device 64 and the second feeding device 63 clamp both ends of the jewelry chain with the preset length, ensuring the posture of the jewelry chain with the preset length before welding the hanging ring. After the jewelry chain as material, which has passed through the pressing device 61, is cut, the third feeding device 64 or the first feeding device 62 clamps the newly formed end of the jewelry chain as material, ensuring the posture of the jewelry chain as material and facilitating subsequent pulling. The first chain feeding device 62 and the third chain feeding device 64 can work alternately to continuously clamp and pull the jewelry chain as material. The first chain feeding device 62 or the third chain feeding device 64 first pulls the end of the jewelry chain as material. After cutting, the third chain feeding device 64 or the first chain feeding device 62 pulls the newly formed end of the material, and the first chain feeding device 62 or the third chain feeding device 64 returns to its original position. This fast production rhythm results in high production efficiency. The first chain feeding device 62, the second chain feeding device 63, and the third chain feeding device 64 clamp the jewelry chain as material at three points. After the jewelry chain as material is cut and has a preset length, its posture is stable, ensuring the normal operation of efficient production. After the jewelry chain end with a preset length, clamped by the first chain feeding device 62 or the third chain feeding device 64, is welded with a hanging ring, the second chain feeding device 63 conveys the other end of the jewelry chain with a preset length to the welding mechanism 5, thereby completing the welding of hanging rings to both ends of the jewelry chain with a preset length. After the first chain feeding device 62 or the third chain feeding device 64 and the second chain feeding device 63 jointly clamp the jewelry chain of the preset length, the jewelry chain of the preset length can be moved to the welding mechanism 5. After the welding mechanism 5 welds the hanging ring to the end of the jewelry chain of the preset length that is clamped by the first chain feeding device 62 or the third chain feeding device 64, the second chain feeding device 63 then moves the other end of the jewelry chain toward the welding mechanism 5.

[0052] Reference Figures 1 to 3 , Figures 13 to 20 , Figure 22 , Figure 23The pressing device 61 includes a movable clamp 611 slidably connected to the frame 1 and a fixed clamp 612 fixedly connected to the frame 1. The frame 1 is provided with an elastic element 613, which can provide the movable clamp 611 with an elastic thrust toward the fixed clamp 612. The elastic element 613 can be a compression spring. The movable clamp 611 and the fixed clamp 612 can accommodate the jewelry chain from the carrying mechanism 2, providing elastic clamping for the jewelry chain. The frame 1 is rotatably connected to a pressing wheel 614. The pressing wheel 614 has an inwardly recessed relief groove 6141 in the middle for abutting the jewelry chain. The pressing wheel 614 is located between the movable clamp 611 and the cutting mechanism 4 in the direction of jewelry chain movement. The axis of the pressing wheel 614 extends perpendicularly to the direction of movement of the jewelry chain when it is pulled by the first chain feeding device 62 or the third chain feeding device 64. The movable clamp 611 and the fixed clamp 612 can hold the jewelry chain, preventing it from shifting, moving backward, or moving forward. The elastic element 613 provides elastic pressure to the jewelry chain through the movable clamp 611, preventing damage from excessive compression and also preventing the chain from breaking due to excessive compression when pulled by the first or third chain feeding device 62 or 64. The pressure wheel 614 prevents the jewelry chain from tilting upward, and its rotatable design reduces friction between the pressure wheel 614 and the jewelry chain, thus reducing wear on the chain.

[0053] Reference Figures 1 to 3 , Figures 13 to 20 , Figure 22 , Figure 23The first chain feeding device 62 includes a first sliding frame 621 that is close to the wire pressing device 61 and away from the welding mechanism 5, and a second sliding frame 622 that is close to the welding mechanism 5 and away from the wire pressing device 61. The first sliding frame 621 is provided with a second sliding frame 622 that can move up and down. The second sliding frame 622 is provided with a first clamp 623 for holding the jewelry chain. The frame 1 is provided with a linear drive module for driving the first sliding frame 621 to slide. The linear drive module can be a lead screw and nut type driven by a motor. The first sliding frame 621 is provided with a cylinder for driving the second sliding frame 622 to move up and down. The first clamp 623 includes two jaws hinged to the second sliding frame 622. Both jaws have claw heads for gripping the jewelry chain. The two jaws are elastically connected at the middle by a tension spring. The second sliding frame 622 is equipped with a cylinder, and a push rod is fixed to the output end of the cylinder. The push rod can extend between the ends of the two jaws furthest from the claw heads. The push rod brings the claw heads closer together and stretches the tension spring, thereby gripping the jewelry chain. When the push rod retracts, the two jaws rotate under the restoring action of the tension spring, and the claw heads move away from each other, releasing the jewelry chain. The movement of the first sliding frame 621 moves the second sliding frame 622 and the first clamp 623 closer to and further away from the wire pressing device 61 and the welding mechanism 5. The second sliding frame 622 drives the first clamp 623 to move closer to and further away from the cutting mechanism 4 and the welding mechanism 5 in the vertical direction, preventing interference between the first clamp 623 and the cutting mechanism 4 and ensuring accurate gripping of the jewelry chain end. In this embodiment, the third chain feeding device 64 has the same structure as the first chain feeding device 62. The third chain feeding device 64 includes a fourth sliding frame that can be close to the wire pressing device 61 and away from the welding mechanism 5, and a fourth sliding frame that is close to the welding mechanism 5 and away from the wire pressing device 61. The fourth sliding frame is provided with a fifth sliding frame that can move up and down, and the fifth sliding frame is provided with a fifth clamp for holding the jewelry chain. The frame 1 is provided with a linear drive module for driving the fourth sliding frame to slide. The linear drive module can be a lead screw and nut type driven by a motor. The fourth sliding frame is provided with a cylinder for driving the fifth sliding frame to move up and down. The fifth clamp includes two jaws hinged to the fifth sliding frame. Each jaw has a claw head for gripping the jewelry chain. The two jaws are elastically connected at the middle by a tension spring. The fifth sliding frame is equipped with a cylinder, and a push rod is fixed to the output end of the cylinder. The push rod can extend between the ends of the two jaws furthest from the claw heads. The push rod brings the claw heads closer together and stretches the tension spring, thereby gripping the jewelry chain. When the push rod retracts, the two jaws rotate under the restoring action of the tension spring, and the claw heads move away from each other, releasing the jewelry chain. The jewelry chain moves from back to front when pulled by the first chain-feeding device 62 and the third chain-feeding device 64.

[0054] Reference Figures 1 to 3 , Figures 13 to 20 , Figure 22 , Figure 23The second chain feeding device 63 includes a third sliding frame 631 that can be positioned close to the cutting mechanism 4 and away from the welding mechanism 5, and also close to the welding mechanism 5 and away from the cutting mechanism 4. The third sliding frame 631 is equipped with a mounting frame 632, which is rotatably connected to a second clamp 633 for holding the jewelry chain via a bearing seat. The mounting frame 632 is equipped with a first power component 634 for driving the second clamp 633 to rotate. The movement of the third sliding frame 631 causes the mounting frame 632, the second clamp 633, and the first power component 634 to move closer to and away from the cutting mechanism 4 and the welding mechanism 5. The frame 1 is equipped with a linear drive module for driving the third sliding frame 631, which can be a screw-nut type driven by a motor. The second clamp 633 can adopt the same structure as the first clamp 623, or it can be a pneumatic finger. The first power component 634 can be made of a synchronous pulley and synchronous belt structure driven by a motor. After the cutting mechanism 4 cuts the jewelry chain, the second clamp 633 holds one end of the jewelry chain with a preset length. After the second clamp 633 approaches the welding mechanism 5 via the third sliding frame 631, the first power component 634 drives the second clamp 633 to rotate, allowing the end of the jewelry chain with the preset length held by the second clamp 633 to approach the welding mechanism 5. After the hanging ring is welded to the end of the jewelry chain held by the first chain feeding device 62 or the third chain feeding device 64, the first chain feeding device 62 or the third chain feeding device 64 releases the end of the jewelry chain with the hanging ring welded. Because the jewelry chain with the preset length has been cut, and the end without the hanging ring is held by the second clamp 633, the jewelry chain with the preset length and the hanging ring welded at one end is in a downward-hanging posture, making it easier for the second clamp 633 to rotate and move the jewelry chain without pulling or breaking the jewelry chain with the preset length and the hanging ring welded at one end.

[0055] Reference Figures 1 to 3 The second transfer mechanism 7 includes a first rotary transfer device 71 and a second rotary transfer device 72 mounted on the frame 1. The first rotary transfer device 71 includes a rotary cylinder mounted on the frame 1, whose output end can rotate vertically. The output end of the rotary cylinder is provided with a transition frame, and the transition frame is provided with a third clamp. The third clamp can adopt a structure similar to the first clamp 623. The third clamp can hold the right side of the completed hanging ring, which is inserted into the molded mandrel 324 after it has been moved into place. The second rotary transfer device 72 includes a rotary cylinder mounted on the frame 1, whose output end can rotate horizontally. The output end of the rotary cylinder is provided with a transition frame, and the transition frame is provided with a fourth clamp. The fourth clamp can adopt a structure similar to the first clamp 623. The fourth clamp can hold the lower part of the hanging ring held by the third clamp. After the fourth clamp completes its gripping, the third clamp releases the hanging ring, and under the action of the rotary cylinder in the second rotary transfer device 72, the fourth clamp rotates until the hanging ring is close to the welding mechanism 5.

[0056] In use, the first transfer mechanism 6 pulls the jewelry chain from the carrying mechanism 2. After the jewelry chain passes the cutting mechanism 4 and is pulled into place by the first transfer mechanism 6, the cutting mechanism 4 cuts the jewelry chain to obtain a jewelry chain of a preset length. The first transfer mechanism 6 aligns the two ends of the jewelry chain of the preset length with the welding mechanism 5. The ring-making mechanism 3 produces hanging rings, and the second transfer mechanism 7 transfers the hanging rings to a position close to the welding mechanism 5. The welding mechanism 5 welds the hanging rings to the two ends of the jewelry chain. The ring-making mechanism 3, the cutting mechanism 4, the welding mechanism 5, the first transfer mechanism 6, and the second transfer mechanism 7 operate in a cycle, thereby automatically producing jewelry chains of the preset length and welding hanging rings to the two ends of the jewelry chains, improving the efficiency of chain cutting and ring welding operations, and achieving high-efficiency production of the product.

[0057] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims of this patent, they should all fall within the protection scope of this utility model.

Claims

1. A chain cutting and welding head and tail ring machine, comprising a frame (1), wherein the frame (1) is provided with a support mechanism (2) for supporting jewelry chains, characterized in that: The frame (1) is provided with a ring-making mechanism (3) for making a hanging ring. The frame (1) is provided with a cutting mechanism (4) for cutting the jewelry chain. The frame (1) is provided with a welding mechanism (5) for welding the hanging ring to the end of the jewelry chain. The frame (1) is provided with a first transfer mechanism (6) for pulling the jewelry chain on the carrying mechanism (2) to the cutting mechanism (4) and conveying the cut jewelry chain toward the welding mechanism (5). The frame (1) is provided with a second transfer mechanism (7) for conveying the hanging ring made by the ring-making mechanism (3) toward the welding mechanism (5). The first transfer mechanism (6) can align the two ends of the cut jewelry chain with the welding mechanism (5) in sequence.

2. The chain cutting and welding head and tail ring machine according to claim 1, characterized in that: The ring-making mechanism (3) includes a bearing part (31), a forming part (32) and a transfer part (33). The bearing part (31) is used to carry the metal wire as the hanging material. The forming part (32) can cut the metal wire and extrude the cut metal wire into shape. The transfer part (33) can transport the metal wire of the bearing part (31) toward the forming part (32).

3. The chain cutting and welding head and tail ring machine according to claim 2, characterized in that: The forming part (32) includes a forming bracket (321), which is hinged to two forming clamps (322). The forming clamps (322) have forming grooves (3221) on their upper parts. The forming grooves (3221) on the two forming clamps (322) are symmetrically arranged. The upper part of the forming grooves (3221) can receive the metal wire from the transfer part (33). The upper parts of the two forming clamps (322) can move closer and further away from each other. The forming bracket (321) is equipped with a vertically movable part. The forming slide frame (323) is provided with a forming mandrel (324) that can reciprocate linearly along its own axis. The forming mandrel (324) is located between the upper parts of two forming clamps (322). The forming support (321) is provided with a first cutter (325) that can move up and down to cut the metal wire from the transfer part (33). The forming support (321) is provided with a forming pressure knife (326) that can move up and down and whose bottom end is located above the forming mandrel (324).

4. The chain cutting and welding head and tail ring machine according to claim 1, characterized in that: The first transfer mechanism (6) includes a pressing device (61) mounted on a frame (1) for limiting the movement of the jewelry chain from the carrying mechanism (2). The frame (1) is provided with a first chain feeding device (62), a second chain feeding device (63), and a third chain feeding device (64) for clamping and releasing the jewelry chain. The first chain feeding device (62) or the third chain feeding device (64) clamps the end of the jewelry chain passing through the pressing device (61) and pulls it toward the welding mechanism (5). The cutting mechanism (4) can cut the jewelry chain pulled into place by the first chain feeding device (62) or the third chain feeding device (64). The second chain feeding device (63) The second chain feeding device (63) can clamp the jewelry chain near the cut point before the cutting mechanism (4) cuts the jewelry chain. The second chain feeding device (63) can transport the cut end of the jewelry chain with a preset length near the cut point to the welding mechanism (5). The third chain feeding device (64) or the first chain feeding device (62) can clamp the jewelry chain near the cut point after passing through the pressing device (61) before the cutting mechanism (4) cuts the jewelry chain. The third chain feeding device (64) or the first chain feeding device (62) can pull the cut end of the jewelry chain near the cut point after passing through the pressing device (61) to the welding mechanism (5) after the cutting mechanism (4) cuts the jewelry chain.

5. The chain cutting and welding head and tail ring machine according to claim 4, characterized in that: The pressing device (61) includes a movable clamp (611) slidably connected to the frame (1) and a fixed clamp (612) fixedly connected to the frame (1). The frame (1) is provided with an elastic element (613). The elastic element (613) can provide the movable clamp (611) with an elastic thrust in the direction of the fixed clamp (612). The movable clamp (611) and the fixed clamp (612) can accommodate the jewelry chain from the bearing mechanism (2). The frame (1) is rotatably connected with a pressing wheel (614). The pressing wheel (614) has an inwardly recessed relief groove (6141) in the middle for resisting the jewelry chain. The pressing wheel (614) is located between the movable clamp (611) and the cutting mechanism (4) in the direction of movement of the jewelry chain. The axis of the pressing wheel (614) extends perpendicularly to the direction of movement of the jewelry chain when it is pulled by the first chain feeding device (62) or the third chain feeding device (64).

6. The chain cutting and welding head and tail ring machine according to claim 1, characterized in that: The cutting mechanism (4) includes two blade holders (41) that can move closer to or further away from each other. The two blade holders (41) are each provided with a second cutter (42). The two second cutters (42) are symmetrically arranged about the moving direction of the blade holders (41).

7. The chain cutting and welding head and tail ring machine according to claim 4, characterized in that: The first chain feeding device (62) includes a first sliding frame (621) that can be close to the pressing device (61) and away from the welding mechanism (5) and close to the welding mechanism (5) and away from the pressing device (61). The first sliding frame (621) is provided with a second sliding frame (622) that can move up and down. The second sliding frame (622) is provided with a first clamp (623) for clamping the jewelry chain.

8. The chain cutting and welding head and tail ring machine according to claim 4, characterized in that: The second chain feeding device (63) includes a third sliding frame (631) that is close to the cutting mechanism (4) and away from the welding mechanism (5) and close to the welding mechanism (5) and away from the cutting mechanism (4). The third sliding frame (631) is provided with a mounting frame (632). The mounting frame (632) is rotatably connected to a second clamp (633) for clamping the jewelry chain. The mounting frame (632) is provided with a first power member (634) for driving the second clamp (633) to rotate.

9. The chain cutting and welding head and tail ring machine according to claim 2, characterized in that: The transfer unit (33) includes a guide rail (331) mounted on the frame (1). The guide rail (331) is slidably connected to a slide block (332). The slide block (332) can move closer to the bearing part (31) and further away from the forming part (32) and closer to the forming part (32) and further away from the bearing part (31) by sliding on the guide rail (331). The slide block (332) is provided with an installation chamber (3321). The slide block (332) is fixedly connected to a first clamping body (33) located in the installation chamber (3321). 3) The top of the first clamping body (333) is provided with a downwardly recessed first groove (3331) for accommodating a jewelry chain. The first clamping body (333) is provided with a vertically penetrating first insertion hole (3332). The slide (332) is slidably connected to a second clamping body (334) located in the mounting chamber (3321) and above the first clamping body (333). The bottom of the second clamping body (334) is provided with an upwardly recessed second groove (3341) for accommodating a jewelry chain. A limiting rod is inserted into a socket (3332). The second clamping body (334) is provided with a second socket (3342) that runs vertically through it. The upper part of the limiting rod is in clearance fit with the second socket (3342). The first groove (3331) and the second groove (3341) are vertically corresponding. The slide (332) is provided with a second power component (335). The second power component (335) has an output end that can press down on the second clamping body (334). The frame (1) is fixedly connected to a third clamping device. The third clamp (336) and the fourth clamp (337) are located above the third clamp (336). The third clamp (336) is located between the slide (332) and the forming part (32) in the moving direction of the slide (332). The fourth clamp (337) is provided with an upwardly recessed third groove (3371). After the third clamp (336) and the third groove (3371) clamp the metal wire, they can apply pressure toward the inside of the metal wire.

10. The chain cutting and welding head and tail ring machine according to claim 9, characterized in that: The slide (332) and the frame (1) are provided with tie rods (8), and tension springs are hung on the two tie rods (8). The frame (1) is hinged with a swing rod (9) that can swing back and forth and abut against the slide (332). The swing rod (9) drives the slide (332) away from the support part (31) and closer to the forming part (32) by swinging. The slide (332) is driven to move closer to the support part (31) and away from the forming part (32) by the return spring.

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