A screw stamping and forming device and method

Abstract

The present invention relates to the technical field of screw stamping devices, and specifically, to a screw stamping and forming device and method thereof, including a stamping head and a material conveyor arranged on one side of the stamping head. The material conveyor includes a fixed table, a driving device arranged outside the fixed table, and a pair of clamping mechanisms that are parallel to each other left and right and are used for clamping iron wires. For this screw stamping and forming device and method, by controlling the change of the position of the pulling plate through a cylinder, the iron wire can be sent to the outside of the mold after the iron wire is cut by the cutting knife, thereby integrating the cutting and feeding of the iron wire, reducing the floor area of the device, and ensuring the continuity of the screw stamping operation.

Description

Technical Field

[0001] The present invention relates to the technical field of screw stamping devices, and more specifically, to a screw stamping and forming device and method thereof. Background Art

[0002] A screw stamping and forming device is an efficient and precise metal processing device, mainly used for processing metal sheets into various specifications of screws through a stamping process. This device adopts an advanced hydraulic system and die design, which can ensure the dimensional accuracy and surface quality of the screws.

[0003] The patent with application number 202020906020.6 discloses a conveniently used screw stamping machine, including: a stamping machine body; an operating table located on the stamping machine body; a cavity opened on the operating table; two sliding columns, both of which are fixedly installed in the cavity; a push plate slidably sleeved on the two sliding columns; two connecting rods, both of which are fixedly installed on the top of the push plate, and the top ends of the two connecting rods both extend outside the cavity; a push bar fixedly installed at the top ends of the two connecting rods.

[0004] However, traditional stamping and forming devices usually adopt a separate operation process, that is, wire feeding, cutting, and stamping and forming are completed step by step by different devices. This decentralized design results in poor continuity of the production line, large floor area of the equipment, and time delay in the connection between each process, significantly reducing the production efficiency. For example, after a traditional cold heading machine completes one stamping, it needs to wait for the wire feeding machine to re - feed and cut the wire, forcing the stamping head to make an ineffective reciprocating motion, causing energy waste and extended production cycle.

[0005] In view of this, we propose a screw stamping and forming device and method thereof. Summary of the Invention

[0006] The purpose of the present invention is to provide a screw stamping and forming device and method thereof to solve the problems raised in the above - mentioned background art.

[0007] To achieve the above purpose, on the one hand, the present invention provides the following technical solutions:

[0008] A screw stamping and forming device includes a stamping head and a material transporter arranged on one side of the stamping head;

[0009] The material transporter includes a fixed table, a driving device arranged outside the fixed table, and a pair of clamping mechanisms arranged parallel to each other left and right and used for clamping wires;

[0010] The fixed table includes a bent plate, an outer convex plate arranged on the outer side wall of the bent plate, and a die arranged at the center position of the outer side wall of the outer convex plate. Feed holes for the wire to pass through are opened on both sides of the outer wall of the outer convex plate with respect to the die.

[0011] The driving device includes a moving plate capable of moving outside the outer convex plate, a pulling plate arranged outside the moving plate, abutting blocks arranged on both sides of the convex plate at the bottom of the pulling plate, a pair of parallel cutting knives, and a limiting block that displaces as the position of the pulling plate changes. A convex rod is integrally formed on the top surface of the cutting knife;

[0012] Two plate surface grooves for the movement of the convex plate at the bottom of the pulling plate are formed on the top surface of the moving plate. A pair of parallel guiding grooves are formed on the top surface of the pulling plate. When the pulling plate displaces, the cutting knife is driven to cut the iron wire fed through the feeding hole into the length matching the screw by the change of the contact position between the guiding groove and the convex rod. When the pulling plate moves to the other end of the plate surface groove, the position of the limiting block is changed by the abutting block, and then the moving plate can be driven to displace by the pulling plate, and the iron wire is sent to the outside of the mold.

[0013] In the technical solution of the present invention, a vertically penetrating sliding groove is formed on the top horizontal plate of the bending plate. A number of regularly distributed limiting holes are formed on the top horizontal plate of the bending plate outside the sliding groove. The outer convex plate is welded and fixed on the outer side wall of the bending plate, and a pair of symmetrically arranged limiting grooves are formed on the outer side wall of the outer convex plate.

[0014] In the technical solution of the present invention, the mold is fixedly connected to the outer side wall of the outer convex plate by bolts, and reinforcing plates are welded and fixed on both side walls at both ends of the outer convex plate.

[0015] In the technical solution of the present invention, a cutting groove communicating with the plate surface groove and the outer side wall is formed inside the moving plate. A number of placing grooves with the same number and size as the limiting holes are formed inside the moving plate. A through hole is formed between the plate surface groove and the placing groove. A bending convex strip adapted to the size of the limiting groove is integrally formed on the outer side wall of the moving plate.

[0016] In the technical solution of the present invention, the driving device further includes a cylinder fixedly connected to the top surface of the bending plate by bolts. The end of the telescopic rod of the cylinder is clamped and fixed on the bending plate at the top of the pulling plate. The bottom convex plates on both sides of the pulling plate are respectively rotatably connected inside the two plate surface grooves. The abutting block is welded and fixed to the pulling plate. The cutting knife is slidably connected inside the cutting groove, and the end of the convex rod extends into the guiding groove.

[0017] In the technical solution of the present invention, the limiting block is slidably connected inside the placing groove. A docking groove corresponding to the position of the through hole is formed on the outer side wall of the limiting block. A number of first springs are welded at the end of the limiting block, and the other ends of the first springs are welded and fixed on the inner groove wall of the placing groove. When the abutting block is inserted into the through hole on one side of the pulling plate, the abutting block abuts against the groove wall of the docking groove, and the limiting block is driven to contract into the placing groove.

[0018] In the technical solution of the present invention, the clamping mechanism includes a placement frame fixedly connected to the outer side wall of the moving plate by bolts, a movable plate arranged inside the placement frame, connecting plates rotatably connected to both ends of the movable plate, a telescopic rod arranged below the movable plate, an extension rod moving together with the movable plate, a second spring arranged outside the connecting plate, and a pair of symmetrically arranged material clamping parts.

[0019] In the technical solution of the present invention, the upper and lower ends of the telescopic rod are respectively clamped and fixed to the outer side wall of the movable plate and the inner side wall of the placement frame, and the extension rod is welded and fixed to the outer side wall of the movable plate.

[0020] In the technical solution of the present invention, the material clamping part includes a clamping rod, a limiting rod welded and fixed to a convex rod at one end of the clamping rod, a rubber pad adhered to a semi-circular notch at the other end of the clamping rod, and an outer jacket frame welded and fixed to a convex rod at one end of the clamping rod. The limiting rod is slidably connected to the outer side wall of the placement frame. One end of the second spring is welded and fixed to the inner side wall of the placement frame, and the other end is welded and fixed to the convex rod at one end of the clamping rod.

[0021] On the other hand, the present invention also provides a screw stamping and forming method, using the above-mentioned screw stamping and forming equipment, including the following steps:

[0022] S1. First, respectively dock two rolls of processed iron wires with two feeding holes on the outer convex plate through a wire feeder, and first start one of the wire feeders to feed the iron wire into the inner part of the feeding hole on the right side;

[0023] S2. When the feeding length of the iron wire meets the requirements for preparing the screw, stop the running wire feeder. At this time, the iron wire is located inside a pair of rubber pads, and the elastic force generated by the second spring will be converted into a force acting on the iron wire through the clamping rod to ensure the overall stability of the iron wire;

[0024] S3. Then, start the air cylinder to drive the pull plate to move to the left side of the plate surface groove. During this process, the contact position between the convex rod and the groove wall of the guiding groove changes, and the cutting knife is driven to cut the iron wire and then retract it back into the inside of the cutting groove;

[0025] S4. At this time, the abutting blocks on the left side of the convex plate at the bottom end of the pull plate are inserted into the inside of the docking grooves on the limit blocks through the through holes. Due to the design of the right-angled trapezoid of the abutting blocks, the position of the limit blocks is driven to contract into the inside of the placement groove, and then the pull plate can drive the moving plate to displace to the left side together;

[0026] S5. Subsequently, when the moving plate moves to the leftmost side of the outer convex plate, the material clamping part on the right side sends the cut iron wire to the outside of the mold, and the stamping head is started to stamp the cut iron wire into the inside of the mold;

[0027] S6. During this process, the stamping end of the stamping head will contact the telescopic rod first, driving the telescopic rod to contract, thereby changing the inclination angle of the connecting plate, squeezing the second spring, separating a pair of clamping parts from each other, and ensuring full contact between the stamping end and the mold.

[0028] S7. After that, when the stamping end of the stamping head leaves the mold, the processed iron wire will be ejected by the ejector pin in the mold. At this time, another wire feeder is started, and the iron wire is fed into the clamping mechanism on the left through the feeding hole on the left.

[0029] S8. Then, control the telescopic rod of the cylinder to contract. After restoring the positions of the pulling plate and the moving plate to the initial state, use the stamping head to stamp the iron wire inside the clamping mechanism on the left again. Subsequently, send the stamped iron wire into the thread rolling machine to complete the preparation of the screw.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] 1. For this screw stamping and forming equipment and method, by controlling the change of the position of the pulling plate through the cylinder, the iron wire can be sent to the outside of the mold after being cut by the cutter, integrating the cutting and feeding of the iron wire, reducing the floor area of the equipment while ensuring the continuity of the screw stamping operation.

[0032] 2. For this screw stamping and forming equipment and method, through the cooperation of the feeding holes symmetrically arranged on both sides of the convex plate and the double wire feeders, the alternate feeding of the left and right stations is realized. When the iron wire on one side is completed with stamping, the feeding on the other side has been completed in advance, and then the cutting and feeding are synchronized, ensuring that each stroke of the stamping head effectively forms one screw and eliminating the idle stroke waiting problem of the traditional equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0034] Figure 2 It is a schematic diagram of the structure of the material transporter in the present invention.

[0035] Figure 3 It is a schematic diagram of the structure of the fixed table in the present invention.

[0036] Figure 4 It is a partial schematic diagram of the structure of the fixed table in the present invention.

[0037] Figure 5 It is a schematic diagram of the structure of the driving device in the present invention.

[0038] Figure 6 It is one of the sectional views of the structure of the moving plate in the present invention.

[0039] Figure 7 This is the second structural sectional view of the moving plate in the present invention.

[0040] Figure 8 This is a partial structural schematic diagram of the driving device in the present invention.

[0041] Figure 9 This is a partial top view of the structure of the driving device in the present invention.

[0042] Figure 10 This is a structural schematic diagram of the cutting knife in the present invention.

[0043] Figure 11 This is a partial structural schematic diagram of the driving device in the present invention.

[0044] Figure 12 This is a structural schematic diagram of the clamping mechanism in the present invention.

[0045] Figure 13 This is a structural schematic diagram of the material clamping part in the present invention.

[0046] Explanation of reference numerals:

[0047] 100, stamping head;

[0048] 200, material transporter; 210, fixed table; 211, bending plate; 2110, sliding groove; 2111, limiting hole; 212, convex plate; 2120, limiting groove; 2121, feeding hole; 213, mold; 214, reinforcing plate; 220, driving device; 221, moving plate; 2210, plate surface groove; 2211, cutting groove; 2212, placing groove; 2213, through hole; 2214, bending rib; 222, pulling plate; 2220, guiding groove; 223, abutting block; 224, cutting knife; 2240, convex rod; 225, limiting block; 2250, docking groove; 226, first spring; 227, cylinder; 230, clamping mechanism; 231, placing frame; 232, movable plate; 233, connecting plate; 234, telescopic rod; 235, extending rod; 236, second spring; 237, material clamping part; 2370, clamping rod; 2371, limiting rod; 2372, rubber pad; 2373, outer jacket. Detailed implementation manners

[0049] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0050] Please refer to Figures 1 - 13As shown in the figure, this embodiment provides a technical solution:

[0051] A screw stamping and forming device, including a stamping head 100 and a feeder 200 arranged on one side of the stamping head 100;

[0052] In this embodiment, as Figures 2 - 4 shown, the feeder 200 includes a fixed platform 210, a driving device 220 arranged outside the fixed platform 210, and a pair of clamping mechanisms 230 that are parallel to each other left and right and used for clamping iron wires.

[0053] Specifically, the fixed platform 210 includes a bent plate 211, an outer convex plate 212 arranged on the outer side wall of the bent plate 211, and a mold 213 arranged at the center position of the outer side wall of the outer convex plate 212. Feeding holes 2121 for the iron wire to pass through are provided on both sides of the mold 213 on the outer wall of the outer convex plate 212.

[0054] Furthermore, a vertically penetrating sliding groove 2110 is provided on the top horizontal plate of the bent plate 211. A number of regularly distributed limiting holes 2111 are provided on the top horizontal plate of the bent plate 211 outside the sliding groove 2110. The outer convex plate 212 is welded and fixed to the outer side wall of the bent plate 211, and a pair of symmetrically arranged limiting grooves 2120 are provided on the outer side wall of the outer convex plate 212.

[0055] Furthermore, the mold 213 is fixedly connected to the outer side wall of the outer convex plate 212 by bolts, and reinforcing plates 214 are welded and fixed to both side walls at both ends of the outer convex plate 212.

[0056] Furthermore, the bent plate 211 is used to ensure the strength of the overall structure of the fixed platform 210. The sliding groove 2110 and the limiting grooves 2120 on the outer convex plate 212 are both used to limit the moving range of the internal structure of the driving device 220. The feeding holes 2121 are used to provide an interval for the iron wire to pass through. After the iron wire passes through the stamping of the stamping head 100, the mold 213 forms a preliminary shape of the screw.

[0057] In this embodiment, as Figures 5 - 7 shown, the driving device 220 includes a moving plate 221 that can move outside the outer convex plate 212, a pulling plate 222 arranged outside the moving plate 221, abutting blocks 223 arranged on both sides of the bottom convex plate of the pulling plate 222, a pair of parallel cutting knives 224, and a limiting block 225 that moves as the position of the pulling plate 222 changes. A convex rod 2240 is integrally formed on the top surface of the cutting knife 224.

[0058] Specifically, a cutting groove 2211 communicating with the plate surface groove 2210 and the outer side wall is formed inside the moving plate 221. A number of placing grooves 2212 with the same number and size as the limiting holes 2111 are formed inside the moving plate 221. A through hole 2213 is formed between the plate surface groove 2210 and the placing groove 2212. A bending rib 2214 adapted to the size of the limiting groove 2120 is integrally formed on the outer side wall of the moving plate 221.

[0059] Further, two plate surface grooves 2210 for the movement of the bottom convex plate of the pulling plate 222 are formed on the top surface of the moving plate 221. A pair of parallel guiding grooves 2220 are formed on the top surface of the pulling plate 222. The cutting groove 2211 is used to provide a movement range for the cutter 224. The placing groove 2212 is used to provide a movement range for the limiting block 225. The through hole 2213 allows the abutting block 223 to enter the inside of the placing groove 2212. The bending rib 2214 is used to ensure the stable movement of the moving plate 221.

[0060] In this embodiment, as Figures 5 - 11 shown, the driving device 220 further includes a cylinder 227 fixedly connected to the top surface of the bending plate 211 by bolts. The end of the telescopic rod of the cylinder 227 is clamped and fixed to the bending plate at the top of the pulling plate 222. The bottom convex plates on both sides of the pulling plate 222 are respectively rotatably connected to the inside of the two plate surface grooves 2210. The abutting block 223 is fixedly welded to the pulling plate 222. The cutter 224 is slidably connected to the inside of the cutting groove 2211. The end of the convex rod 2240 extends into the inside of the guiding groove 2220.

[0061] Specifically, the limiting block 225 is slidably connected to the inside of the placing groove 2212. A docking groove 2250 corresponding to the position of the through hole 2213 is formed on the outer side wall of the limiting block 225. A number of first springs 226 are welded to the end of the limiting block 225. The other ends of the first springs 226 are fixedly welded to the inner groove wall of the placing groove 2212. When the abutting block 223 is inserted into the inside of the through hole 2213 on one side along with the pulling plate 222, the abutting block 223 abuts against the groove wall of the docking groove 2250, driving the limiting block 225 to contract into the inside of the placing groove 2212.

[0062] Further, the starting cylinder 227 is activated to drive the sliding plate 222 to move. When the sliding plate 222 is displaced, due to the change in the contact position between the guiding groove 2220 and the convex rod 2240, the cutting knife 224 is driven to cut the iron wire fed through the feeding hole 2121 into the length suitable for the screws. When the sliding plate 222 moves to the other end of the plate surface groove 2210, the position of the limiting block 225 is changed by driving of the abutting block 223. Then, the moving plate 221 can be displaced by driving of the sliding plate 222, and the iron wire is sent to the outside of the mold 213. The first spring 226 applies an outward acting force on the limiting block 225 through its own elastic force, so that the end of the limiting block 225 can extend into the limiting hole 2111 to limit the movement of the position of the moving plate 221.

[0063] In this embodiment, as Figures 12 - 13 shown, the clamping mechanism 230 includes a placement frame 231 fixedly connected to the outer side wall of the moving plate 221 by bolts, a movable plate 232 arranged inside the placement frame 231, connecting plates 233 rotatably connected to both ends of the movable plate 232, a telescopic rod 234 arranged below the movable plate 232, an extension rod 235 moving together with the movable plate 232, a second spring 236 arranged outside the connecting plate 233, and a pair of symmetrically arranged material clamping parts 237.

[0064] Specifically, the upper and lower ends of the telescopic rod 234 are respectively clamped and fixed to the outer side wall of the movable plate 232 and the inner side wall of the placement frame 231, and the extension rod 235 is welded and fixed to the outer side wall of the movable plate 232.

[0065] Further, the material clamping part 237 includes a clamping rod 2370, a limiting rod 2371 welded and fixed to the convex rod at one end of the clamping rod 2370, a rubber pad 2372 adhered to the semi-circular notch at the other end of the clamping rod 2370, and an outer jacket 2373 welded and fixed to the convex rod at one end of the clamping rod 2370. The limiting rod 2371 is slidably connected to the outer side wall of the placement frame 231. One end of the second spring 236 is welded and fixed to the inner side wall of the placement frame 231, and the other end is welded and fixed to the convex rod at one end of the clamping rod 2370.

[0066] Further, when the length of the iron wire fed through the feed hole 2121 meets the requirement for manufacturing the screw, stop the operating wire feeder. At this time, the iron wire is located inside a pair of rubber pads 2372, and the elastic force generated by the second spring 236 is converted into a force acting on the iron wire through the clamping rod 2370, ensuring the overall stability of the iron wire. When the stamping head 100 works, the stamping end of the stamping head 100 first contacts the outer extension rod 235, driving the telescopic rod 234 to contract, and then changing the inclination angle of the connecting plate 233, thereby squeezing the second spring 236 and separating a pair of material clamping parts 237 from each other, ensuring complete contact between the stamping end and the die 213. At this time, the limit rod 2371 slides on the side wall of the placement frame 231, restricting the overall moving direction of the material clamping part 237.

[0067] The present invention also provides a screw stamping and forming method, using the above screw stamping and forming equipment, including the following steps:

[0068] S1. First, dock two processed coils of iron wire with two feed holes 2121 on the outer convex plate 212 through the wire feeder respectively, and start one of the wire feeders first, feeding the iron wire into the right-side feed hole 2121.

[0069] S2. When the fed length of the iron wire meets the requirement for manufacturing the screw, stop the operating wire feeder. At this time, the iron wire is located inside a pair of rubber pads 2372, and the elastic force generated by the second spring 236 is converted into a force acting on the iron wire through the clamping rod 2370, ensuring the overall stability of the iron wire.

[0070] S3. Then, start the cylinder 227 to drive the pull plate 222 to move to the left side of the plate surface groove 2210. During this process, the contact position between the convex rod 2240 and the groove wall of the guide groove 2220 changes, driving the cutter 224 to cut the iron wire and then retract it back into the cutting groove 2211.

[0071] S4. At this time, the blocks 223 on the left side of the convex plate at the bottom end of the pull plate 222 are inserted into the docking grooves 2250 on the limit blocks 225 through the through holes 2213. Due to the right-angled trapezoid design of the blocks 223, the position of the limit blocks 225 is contracted into the placement groove 2212, and then the pull plate 222 can drive the moving plate 221 to displace to the left together.

[0072] S5. Subsequently, when the moving plate 221 moves to the leftmost side of the outer convex plate 212, the right-side material clamping part 237 sends the cut iron wire to the outside of the die 213, and start the stamping head 100 to stamp the cut iron wire into the die 213.

[0073] S6. During this process, the stamping end of the stamping head 100 will come into contact with the outer extension rod 235 first, driving the telescopic rod 234 to contract, and then changing the inclination angle of the connecting plate 233, thereby squeezing the second spring 236 and separating the pair of clamping parts 237 from each other, so as to ensure full contact between the stamping end and the mold 213;

[0074] S7. After that, when the stamping end of the stamping head 100 leaves the mold 213, the processed wire will also be ejected by the ejector pin in the mold 213. At this time, another wire feeder is started, and the wire is fed into the left clamping mechanism 230 through the left feed hole 2121;

[0075] S8. Then, control the telescopic rod of the cylinder 227 to contract. After restoring the positions of the drawing plate 222 and the moving plate 221 to the initial state, use the stamping head 100 to stamp the wire located inside the left clamping mechanism 230 again. Subsequently, send the stamped wire into a thread rolling machine to complete the preparation of the screw.

[0076] The foregoing description of specific exemplary embodiments of the present invention is for purposes of illustration and exemplification. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many modifications and variations are possible in light of the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the invention and its practical applications, so that those skilled in the art can implement and utilize various different exemplary embodiments of the invention, as well as various different selections and modifications. The scope of the invention is intended to be defined by the specification and its equivalents.

Claims

1. A screw stamping and forming device, comprising a stamping head and a material transporter arranged on one side of the stamping head; Features: The material conveyor comprises a fixed platform, a driving device arranged outside the fixed platform, and a pair of left and right parallel clamping mechanisms for clamping the iron wire; The fixing platform includes a bending plate, an outer convex plate arranged on the outer side wall of the bending plate, and a mold arranged at the center of the outer side wall of the outer convex plate, and the outer wall of the outer convex plate is provided with feed holes for the iron wire to pass through on both sides of the mold; The driving device comprises a movable plate capable of moving outside the outer convex plate, a draw plate arranged outside the movable plate, abutment blocks arranged on both sides of the convex plate at the bottom of the draw plate, a pair of parallel cutters and a limit block that moves as the position of the draw plate changes, and a convex rod is integrally formed on the top surface of the cutter; The top surface of the movable plate is provided with two plate surface grooves for moving the convex plate at the bottom of the pull-out plate, and the top surface of the pull-out plate is provided with a pair of parallel guide grooves. When the pull-out plate is displaced, the contact position between the guide groove and the convex rod is changed, thereby driving the cutter to cut the iron wire fed from the feed hole into a length that matches the screw, and when the pull-out plate moves to the other end of the plate surface groove, the position of the limit block is changed through the stop block, and then the movable plate can be driven to move through the pull-out plate, and the iron wire can be sent to the outside of the mold; The clamping mechanism includes a placement frame fixedly connected to the outer side wall of the movable plate by bolts, a movable plate arranged inside the placement frame, a connecting plate rotatably connected to both ends of the movable plate, a telescopic rod arranged below the movable plate, an outward extension rod moving with the movable plate, a second spring arranged outside the connecting plate, and a pair of symmetrically arranged clamping parts.

2. The screw stamping and forming equipment according to claim 1, characterized in that: The top horizontal plate of the bending plate is provided with a sliding groove which passes through from top to bottom, and the top horizontal plate of the bending plate is provided with a plurality of regularly distributed limiting holes on the outside of the sliding groove. The outer convex plate is welded and fixed to the outer side wall of the bending plate, and a pair of symmetrically arranged limiting grooves are provided on the outer side wall of the outer convex plate.

3. The screw stamping and forming equipment according to claim 2, characterized in that: The mold is fixedly connected to the outer side wall of the outer convex plate by bolts, and reinforcing plates are welded and fixed to the side walls at both ends of the outer convex plate.

4. The screw stamping and forming equipment according to claim 3, characterized in that: The movable plate has a cutting groove inside that is connected to the plate surface groove and the outer side wall, a plurality of placement grooves whose number is the same as the limiting holes and whose sizes are matched, a through hole is provided between the plate surface groove and the placement groove, and a bent convex strip matched to the size of the limiting groove is integrally formed on the outer side wall of the movable plate.

5. The screw stamping and forming equipment according to claim 4, characterized in that: The driving device also includes a cylinder fixedly connected to the top surface of the bending plate by bolts, the end of the telescopic rod of the cylinder is clamped and fixed to the bending plate on the top of the pull-out plate, the bottom end convex plates on both sides of the pull-out plate are respectively rotatably connected to the inside of the two plate surface grooves, the stop block is welded and fixed to the pull-out plate, the cutter is slidably connected to the inside of the cutting groove, and the end of the convex rod extends to the inside of the guide groove.

6. The screw stamping and forming equipment according to claim 5, characterized in that: The limit block is slidably connected to the inside of the placement groove, and a docking groove corresponding to the position of the through hole is opened on the outer wall of the limit block. A plurality of first springs are welded at the end of the limit block, and the other end of the first spring is welded and fixed to the inner groove wall of the placement groove. When the pull-out plate is inserted into the through hole on one side, the block contacts the groove wall of the docking groove, thereby driving the limit block to retract into the inside of the placement groove.

7. The screw stamping and forming equipment according to claim 6, characterized in that: The upper and lower ends of the telescopic rod are respectively clamped and fixed on the outer side wall of the movable plate and the inner side wall of the placement frame, and the outrigger rod is welded and fixed on the outer side wall of the movable plate.

8. The screw stamping and forming equipment according to claim 7, characterized in that: The clamping part includes a clamping rod, a limiting rod welded and fixed to a convex rod at one end of the clamping rod, a rubber pad adhered to a semicircular notch at the other end of the clamping rod, and an outer frame welded and fixed to a convex rod at one end of the clamping rod. The limiting rod is slidably connected to the outer wall of the placement frame, one end of the second spring is welded and fixed to the inner wall of the placement frame, and the other end is welded and fixed to the convex rod at one end of the clamping rod.

9. A screw stamping method, using the screw stamping equipment according to claim 8, characterized in that: The following steps are involved: S1. First, the two processed rolls of iron wire are connected to the two feed holes on the outer convex plate through the wire feeders, and one of the wire feeders is started to feed the iron wire into the feed hole on the right side; S2. When the length of the iron wire fed meets the requirements for preparing the screw, the running wire feeder is stopped. At this time, the iron wire is located inside the pair of rubber pads, and the elastic force generated by the second spring is converted into a force acting on the iron wire through the clamping rod, thereby ensuring the overall stability of the iron wire; S3, then, the cylinder is started to drive the pull-out plate to move to the left side of the plate surface groove. During this process, the contact position between the protruding rod and the guide groove wall changes, and the cutter is driven to cut the wire and then retract it into the cutting groove; S4. At this time, the abutment blocks on the left side of the convex plate at the bottom end of the pull-out plate are inserted into the interior of the docking groove on the limit block through the through hole, and the right-angle trapezoidal design of the abutment blocks drives the position of the limit blocks to shrink into the interior of the placement groove, so that the pull-out plate can drive the movable plate to move to the left together; S5. Subsequently, when the movable plate moves to the leftmost side of the outer convex plate, the clamping part on the right side delivers the cut iron wire to the outside of the mold, and starts the punching head to punch the cut iron wire into the inside of the mold; S6. During this process, the punching end of the punch head will contact the extension rod first, which will drive the telescopic rod to contract, thereby changing the inclination angle of the connecting plate, thereby squeezing the second spring and separating the pair of clamping parts from each other, thereby ensuring full contact between the punching end and the mold; S7. Afterwards, when the punching end of the punch head leaves the die, the processed iron wire will also be ejected by the ejector in the die. At this time, another wire feeder is started to feed the iron wire from the feed hole on the left into the inside of the clamping mechanism on the left; S8. Then, the telescopic rod of the cylinder is controlled to retract, and after the positions of the pull-out plate and the movable plate are restored to the initial state, the iron wire located inside the left clamping mechanism is punched again by the punch head. Subsequently, the punched iron wire is sent to the thread rolling machine to complete the preparation of the screw.

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