A wire cutting machine for screw production

Abstract

The present invention discloses a wire cutting machine for screw production, comprising a base, a feeding and cutting device arranged at one end of the base, and a cold heading device arranged at the other end of the base; the feeding and cutting device comprises a cutting seat, which is provided with a straightening slot and a forming positioning hole; the cutting seat is provided with a pushing mechanism on one side of the straightening slot; the pushing mechanism is provided with a pushing shaft, which is slidably arranged in the forming positioning hole; the cutting seat is provided with a cutting assembly; the base is provided with a straightening device at a position corresponding to the straightening slot; the straightening device is provided with a straightening channel; the straightening device and the pushing mechanism are connected with a one-way transmission; the base is provided with a moving mechanism at a position corresponding to the straightening channel; continuous production of screws is realized, thereby improving production efficiency, effectively reducing the coordination time between cutting and cold heading, and making product consistency better.

Description

Technical Field

[0001] The present invention relates to the technical field of screw processing, in particular to a wire cutting machine for screw production. Background Art

[0002] In the traditional screw production process, wire cutting and cold heading are typically performed by two separate machines. This process involves multiple operations and relies on a feeding mechanism to transport the cut wire segments to the cold heading unit.

[0003] Although this decentralized production method realizes the mass production of screws, the production cost of the screws is high and the consistency of the products is poor, which increases the production efficiency of the screws. Summary of the Invention

[0004] The object of the present invention is to overcome the above-mentioned disadvantages and provide a wire cutting machine for screw production.

[0005] To achieve the above object, the specific solutions of the present invention are as follows:

[0006] A wire cutting machine for screw production comprises a base, a feeding and cutting device provided at one end of the base, and a cold heading device provided at the other end of the base;

[0007] The feeding and cutting device comprises a cutting seat, which is provided with a straightening slot and a forming positioning hole; the cutting seat is provided with a pushing mechanism on one side of the straightening slot; the pushing mechanism is provided with a pushing shaft, which is slidably arranged in the forming positioning hole; the cutting seat is provided with a cutting assembly;

[0008] The base is provided with a straightening device at a position corresponding to the straightening slot; the straightening device is provided with a straightening channel; the straightening device is connected to the pushing mechanism in a one-way transmission; the base is provided with a moving mechanism at a position corresponding to the straightening channel.

[0009] The present invention further comprises a pushing mechanism comprising a pushing seat slidably mounted on the cutting seat, a transmission rack mounted on the pushing seat, a first slider slidably mounted on the pushing seat, a first pin elastically mounted on the first slider, and a first spring mounted in the forming positioning hole; a second spring is mounted between the first slider and the pushing seat; a pushing shaft is mounted on one end of the pushing seat close to the straightening device; and the transmission rack is connected to the straightening device in a one-way transmission manner.

[0010] The cutting seat is provided with a first driving groove; the first pin shaft is movably embedded in the first driving groove, and the first pin shaft cooperates with the first driving groove to unlockably lock the thrust seat.

[0011] The present invention further comprises a first driving groove comprising a first bevel groove, a second bevel groove, a third bevel groove and a fourth bevel groove which are connected end to end in sequence; a blocking step is provided between the first bevel groove and the fourth bevel groove, and a transition inclined surface is provided in the first bevel groove; the first bevel groove and the fourth bevel groove, the second bevel groove and the third bevel groove are all connected in a V-shape, and a locking point is formed at the connection between the two.

[0012] The present invention further provides a guide groove on one side of the straightening groove of the cutting seat, and the push seat is slidably arranged in the guide groove; the first slider is arranged on the top surface of the push seat, and the first driving groove is arranged on the inner top wall of the guide groove.

[0013] The present invention further provides a receiving groove on one side of the straightening groove, in which a one-way transmission assembly is provided; the one-way transmission assembly includes a transmission gear, a one-way ratchet and a one-way pawl; the transmission gear is rotatably arranged in the receiving groove, and a mounting groove is provided on the disk surface of the transmission gear; the one-way ratchet is connected to the straightening device and is arranged in the mounting groove; the one-way pawl is slidably arranged on the groove wall of the mounting groove and a third spring is connected between the one-way pawl and the transmission gear; the one-way pawl is engaged with the one-way ratchet in one-way transmission under the elastic force of the third spring.

[0014] The present invention further provides a straightening device comprising a straightening seat, an active straightening wheel, a first driven straightening wheel, and a plurality of groups of second driven straightening wheels; the straightening seat is provided with a straightening channel extending therethrough; the active straightening wheel is rotatably arranged below the straightening channel, and the first driven straightening wheel is rotatably arranged above the straightening channel and directly above the active straightening wheel; each group of second driven straightening wheels comprises two second driven straightening wheels oppositely arranged on either side of the straightening channel; at least one group of second driven straightening wheels is vertically rotatably arranged on the left and right sides of the straightening channel, and at least one group of second driven straightening wheels is horizontally rotatably arranged on the upper and lower sides of the straightening channel;

[0015] The one-way ratchet is fixedly connected to the active straightening wheel.

[0016] The present invention further provides a cutting auxiliary assembly for the cutting seat; the cutting assembly includes a cutting cylinder and a cutting tool; the cutting cylinder is mounted on the cutting seat, the cutting tool is slidably mounted on the cutting seat and a return spring is provided between the cutting seat and the cutting tool;

[0017] The cutting auxiliary assembly includes a push rod vertically slidingly arranged in the cutting seat and an auxiliary rod rotatably arranged on the top of the cutting seat. The upper end of the push rod is movably inserted into the auxiliary rod, and a fourth spring is provided between the push rod and the auxiliary rod; a second pin shaft is provided at the upper end of the push rod, and a second drive groove is provided on the inner wall of the auxiliary rod, and the second pin shaft is movably embedded in the second drive groove; a swing arm is provided at the upper end of the auxiliary rod, and a drive inclined surface for cooperating with the push seat is provided at the lower end of the push rod; the swing arm can swing between the cutting cylinder and the cutting tool.

[0018] Furthermore, in the present invention, the second driving groove includes a spiral section and a first vertical section, and the upper end of the spiral section is connected to the lower end of the first vertical section.

[0019] The present invention further comprises a material moving mechanism comprising a material moving cylinder and a second slider; a base is provided with a limiting platform, the material moving cylinder is provided on the base, and the second slider is slidably provided on the output end of the material moving cylinder; a third pin is provided on the side wall of the second slider, the limiting platform is provided with a limiting groove, and the third pin is movably embedded in the limiting groove; the limiting groove comprises an inclined section and a second vertical section; the high end of the inclined section is connected to the lower end of the second vertical section, and the high end of the inclined section is arranged close to the forming positioning hole;

[0020] The top of the second sliding block is arranged on the material moving bearing platform. Both ends of the material moving bearing platform are provided with arc baffles, and the height of one end of the material moving bearing platform close to the forming positioning hole is lower than the height of the other end.

[0021] The present invention further provides a cold heading device comprising a cold heading cylinder, a die mounting base, a first die, and a second die; the die mounting base has a central shaft; an output end of the cold heading cylinder is provided with a central hole; the central shaft is slidably inserted into the central hole and a fifth spring is provided between the central shaft and the die mounting base; a third driving groove is provided on the outer wall of the central shaft, and a fourth pin is elastically provided on the inner wall of the central hole; the fourth pin is movably embedded in the third driving groove;

[0022] The third driving groove includes a plurality of linear grooves and spiral grooves which are alternately connected end to end; thrust steps are provided at both ends of the linear grooves.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention integrates the two major processes of wire cutting and cold heading into one, optimizes the overall process flow, and enables the cut wire segment to be directly transferred to the coaxial position with the forming positioning hole through the material transfer mechanism, so that the wire segment is pushed into the forming positioning hole through cold heading for cold heading. At the same time, the one-way transmission of the pushing mechanism and the straightening device is utilized, so that after cold heading, the pushing mechanism is used for unloading and the straightening device is used for automatic feeding and straightening operations, thereby realizing continuous production of screws, thereby improving production efficiency, effectively reducing the coordination time of cutting and cold heading, and making the product consistency better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 This is a schematic structural diagram of the present invention when the wire segment and the formed positioning hole are coaxial;

[0027] Figure 3 This is a schematic diagram of the structure of the wire segment being pushed into the formed positioning hole of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the present invention after the cutting seat is hidden;

[0029] Figure 5 It is a structural schematic diagram of the material pushing mechanism of the present invention;

[0030] Figure 6 yes Figure 5 A local enlarged schematic diagram of point I in the middle;

[0031] Figure 7 This is a structural schematic diagram of the material pushing mechanism of the present invention from another perspective;

[0032] Figure 8 It is a schematic structural diagram of the cutting seat of the present invention;

[0033] Figure 9 This is a schematic structural diagram of the cutting seat of the present invention from another perspective;

[0034] Figure 10 yes Figure 9 A partial enlarged schematic diagram of point II in the middle;

[0035] Figure 11 It is a structural schematic diagram of the straightening device of the present invention;

[0036] Figure 12 This is a schematic structural diagram of the straightening device of the present invention after the straightening seat is hidden;

[0037] Figure 13 is an exploded schematic diagram of the one-way transmission assembly of the present invention;

[0038] Figure 14 1 is an exploded schematic diagram of the cold heading device of the present invention;

[0039] Figure 15 It is a structural schematic diagram of the mold mounting base of the present invention;

[0040] Figure 16 It is a structural schematic diagram of the material moving mechanism of the present invention;

[0041] Figure 17 is an exploded schematic diagram of the cutting auxiliary assembly of the present invention;

[0042] Figure 18 is a cross-sectional schematic diagram of a cutting auxiliary assembly of the present invention;

[0043] Explanation of the reference numerals: 1. base; 11. limit table; 12. inclined section; 13. second vertical section; 21. cutting seat; 211. straightening slot; 212. forming positioning hole; 213. first inclined slot; 214. second inclined slot; 215. third inclined slot; 216. fourth inclined slot; 217. guide slot; 218. receiving slot; 221. push seat; 2211. push shaft; 222. transmission rack; 223. first slider; 224. first pin; 225. first spring; 226. second spring; 231. cutting cylinder; 232. cutting tool; 233. return spring; 31. cold heading oil cylinder; 311. center hole; 32. mold mounting seat; 321. center axis; 322. linear slot; 32 3. Spiral groove; 33. First mold; 34. Second mold; 35. Fifth spring; 36. Fourth pin; 37. Eighth spring; 41. Straightening seat; 411. Straightening channel; 42. Active straightening wheel; 43. First driven straightening wheel; 44. Second driven straightening wheel; 451. Transmission gear; 452. One-way ratchet; 453. One-way pawl; 454. Third spring; 51. Material transfer cylinder; 52. Second slider; 521. Third pin; 522. Material transfer platform; 523. Arc baffle; 61. Push rod; 611. Second pin; 612. Driving ramp; 62. Auxiliary rod; 621. Swing arm; 622. Spiral section; 623. First vertical section; 63. Fourth spring; 71. Blanking plate. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

[0045] like Figures 1 to 18 As shown, the wire cutting machine for screw production described in this embodiment includes a base 1, a feeding and cutting device provided at one end of the base 1, and a cold heading device provided at the other end of the base 1;

[0046] The feeding and cutting device includes a cutting seat 21, which is provided with a straightening groove 211 and a forming positioning hole 212; the cutting seat 21 is provided with a pushing mechanism on one side of the straightening groove 211; the pushing mechanism is provided with a pushing shaft 2211, and the pushing shaft 2211 is slidably provided in the forming positioning hole 212; the cutting seat 21 is provided with a cutting assembly;

[0047] The base 1 is provided with a straightening device at a position corresponding to the straightening slot 211 ; the straightening device is provided with a straightening channel 411 ; the straightening device is connected to the pushing mechanism in a one-way transmission manner; the base 1 is provided with a material moving mechanism at a position corresponding to the straightening channel 411 .

[0048] In actual application, the wire to be cut is passed through the straightening channel 411 until the wire passes through the straightening channel 411 to reach a preset length. The cutting assembly cuts the wire that passes through, and the cut wire segment is inserted into the material moving mechanism. The material moving mechanism moves the wire segment to make the wire segment coaxial with the forming positioning hole 212, such as Figure 2 As shown, the cold heading device then pushes the wire section into the forming positioning hole 212, as shown in FIG. Figure 3 As shown, the wire segment squeezes the push shaft 2211 and slides until the wire segment is pushed into place. The cold heading device cold heads the wire segment into a screw. After cold heading, the cold heading device resets, and the pushing mechanism drives the push shaft 2211 to reset, and the screw formed by cold heading is removed from the forming positioning hole 212. In this way, the production of a screw is completed.

[0049] During the resetting process of the pushing mechanism, the pushing mechanism drives the straightening device to work, the straightening device conveys the wire and straightens the wire, allowing the wire to pass through again, and then the cutting assembly cuts the wire. The above process is repeated to continuously cut and cold-head the wire.

[0050] This embodiment integrates the two major processes of wire cutting and cold heading into one, optimizes the overall process flow, and enables the cut wire segment to be directly transferred to the coaxial forming positioning hole 212 through the material transfer mechanism, so that the wire segment is pushed into the forming positioning hole 212 through cold heading for cold heading. At the same time, the one-way transmission of the pushing mechanism and the straightening device is utilized, so that after cold heading, the pushing mechanism is used for unloading and the straightening device is used for automatic feeding and straightening operations, thereby realizing continuous production of screws, thereby improving production efficiency, effectively reducing the coordination time of cutting and cold heading, and making product consistency better.

[0051] like Figures 1 to 7 As shown, based on the above embodiment, the pushing mechanism further includes a pushing seat 221 slidably arranged on the cutting seat 21, a transmission rack 222 arranged on the pushing seat 221, a first slider 223 slidably arranged on the pushing seat 221, a first pin 224 elastically arranged on the first slider 223 and a first spring 225 arranged in the forming positioning hole 212; a second spring 226 is provided between the first slider 223 and the pushing seat 221; a pushing shaft 2211 is provided at one end of the pushing seat 221 close to the straightening device; the transmission rack 222 is connected to the straightening device in a one-way transmission manner; as shown Figures 8 to 10 As shown, the cutting seat 21 is provided with a first driving groove; the first pin 224 is movably embedded in the first driving groove, and the first pin 224 cooperates with the first driving groove to unlockably lock the thrust seat 221. Figure 10As shown, in this embodiment, the first driving groove includes a first bevel groove 213, a second bevel groove 214, a third bevel groove 215 and a fourth bevel groove 216 which are connected end to end in sequence; a blocking step is provided between the first bevel groove 213 and the fourth bevel groove 216 to prevent the first pin shaft 224 from entering the fourth bevel groove 216 from the first bevel groove 213; a transition inclined surface is provided in the first bevel groove 213; the first bevel groove 213 and the fourth bevel groove 216, the second bevel groove 214 and the third bevel groove 215 are all connected in a V shape, and the connection between the two forms a locking point.

[0052] Specifically, for ease of explanation, Figure 10 As shown, the endpoint position of the first inclined slot 213 away from the second inclined slot 214 is defined as point A, the other endpoint position of the first inclined slot 213 is defined as point B, the locking point is defined as point C, and one end of the fourth inclined slot 216 away from the first inclined slot 213 is defined as point D; initially, under the elastic force of the first spring 225, the push seat 221 drives the push shaft 2211 to move until the end face of the push shaft 2211 is flush with the end of the formed positioning hole 212, the first pin shaft 224 is located at point A, and the second spring 226 is in a compressed state.

[0053] After the wire segment is moved to align with the positioning forming hole, Figure 2 As shown, the cold heading device pushes the wire segment to squeeze the push shaft 2211, and the push seat 221 slides away from the cold heading device. The first spring 225 is compressed, that is, the push shaft 2211 retracts and slides. At this time, the first pin 224 moves from the first inclined slot 213 at point A until the first pin 224 moves to point B. At this time, the wire segment is pushed into place, and then the cold heading device performs the first cold heading forming on the wire segment. Then the cold heading device releases the extrusion of the wire segment. At this time, the first spring 225 pushes the push shaft 2211 to slide toward the cold heading device. The first slider 223 drives the first pin 224 to move under the elastic force of the second spring 226, so that the first pin 224 moves from point B along the second inclined slot 214 to point C. At this time, the first pin 224 cooperates with the locking point to lock the push seat 221.

[0054] Then the cold heading device squeezes the wire segment again, and the first slider 223 drives the first pin 224 to move under the elastic force of the second spring 226, so that the first pin 224 moves from point C along the third inclined slot 215 to point D, thereby unlocking the push seat 221. At this time, the wire segment is pushed into place again, and then the cold heading device performs a second cold heading forming on the wire segment. The wire segment formed by the second cold heading is formed into a screw, and then the cold heading device is reset to release the squeeze on the screw. At this time, the first spring 225 is reset, pushing the push seat 221 toward the cold heading device, and the push seat 221 drives the push shaft 2211 to slide in the forming positioning hole 212, thereby removing the screw from the forming positioning hole 212. 12 is pushed out to complete the unloading. Under the elastic force of the second spring 226, the first pin shaft 224 moves from point D along the fourth inclined slot 216 until the first pin shaft 224 is reset to point A. At this time, the screw is completely withdrawn from the forming positioning hole 212, and the second spring 226 is compressed. During this process, the push seat 221 drives the transmission rack 222 to move, and the transmission rack 222 drives the straightening device to work, protruding the preset length of wire from the straightening channel 411 and straightening the wire; then the cutting component cuts the preset length of wire, and repeats the above process, continuously performing the wire cutting and cold heading forming process, thereby improving production efficiency and improving product consistency.

[0055] like Figure 4 、 Figure 8 and Figure 9 As shown, based on the above embodiment, the cutting seat 21 is further provided with a guide groove 217 on one side of the straightening groove 211, and the push seat 221 is slidably arranged in the guide groove 217; the first slider 223 is provided on the top surface of the push seat 221, and the first driving groove is provided on the inner top wall of the guide groove 217. In this embodiment, the guide groove 217 is provided to provide guidance and limit for the push seat 221, making the movement of the push seat 221 more stable.

[0056] like Figure 4 、 Figure 7 、 Figures 11 to 13 As shown, based on the above embodiment, further, a receiving groove 218 is provided on one side of the straightening slot 211, and a one-way transmission assembly is provided in the receiving groove 218; the one-way transmission assembly includes a transmission gear 451, a one-way ratchet 452 and a one-way pawl 453; the transmission gear 451 is rotatably arranged in the receiving groove 218, and a mounting groove is provided on the disk surface of the transmission gear 451; the one-way ratchet 452 is connected to the straightening device and is arranged in the mounting groove; the one-way pawl 453 is slidably arranged on the groove wall of the mounting groove and is connected to the transmission gear 451 with a third spring 454; the one-way pawl 453 is engaged with the one-way ratchet 452 in one-way transmission under the elastic force of the third spring 454.

[0057] Specifically, the third spring 454 causes the one-way pawl 453 to maintain a tendency to engage with the one-way ratchet 452; when the first spring 225 pushes the push seat 221 to slide toward the cold heading device, the push seat 221 drives the transmission rack 222 to slide, and the transmission rack 222 drives the transmission gear 451 to rotate, and the transmission gear 451 drives the one-way ratchet 452 to rotate through the one-way pawl 453, and the one-way ratchet 452 drives the straightening device to work, thereby realizing the conveying and straightening processing of the wire;

[0058] When the push seat 221 compresses the first spring 225 and slides away from the cold heading device, the push seat 221 drives the transmission rack 222 to slide in the opposite direction, and the transmission rack 222 drives the transmission gear 451 to rotate in the opposite direction. Since the one-way pawl 453 and the one-way ratchet 452 are one-way transmission, the transmission gear 451 will not drive the one-way ratchet 452 to rotate through the one-way pawl 453 at this time, that is, the transmission gear 451 rotates idly to ensure the consistency of the wire cutting length.

[0059] like Figures 1 to 4 、 Figure 11 and Figure 12 As shown, based on the above embodiment, the straightening device further includes a straightening seat 41, an active straightening wheel 42, a first driven straightening wheel 43 and multiple groups of second driven straightening wheels 44; the straightening seat 41 is penetrated by a straightening channel 411; the active straightening wheel 42 is rotatably arranged below the straightening channel 411, and the first driven straightening wheel 43 is rotatably arranged above the straightening channel 411 and is located directly above the active straightening wheel 42; each group of second driven straightening wheels 44 includes two second driven straightening wheels 44 relatively arranged on both sides of the straightening channel 411; at least one group of second driven straightening wheels 44 is vertically rotatable and arranged on the left and right sides of the straightening channel 411, and at least one group of second driven straightening wheels 44 is horizontally rotatable and arranged on the upper and lower sides of the straightening channel 411; the one-way ratchet 452 is fixedly connected to the active straightening wheel 42.

[0060] Specifically, if Figure 12 As shown, two groups of second driven straightening wheels 44 are arranged on the left and right sides of the straightening channel 411 in a vertically rotating manner. The two groups of second driven straightening wheels 44 are distributed on both sides of the active straightening wheel 42 and the first driven straightening wheel 43. One group of second driven straightening wheels 44 is arranged on the upper and lower sides of the straightening channel 411 in a horizontally rotating manner.

[0061] When the first spring 225 pushes the push seat 221 to slide toward the cold heading device, the push seat 221 drives the transmission rack 222 to slide, and the transmission rack 222 drives the transmission gear 451 to rotate. The transmission gear 451 drives the one-way ratchet 452 to rotate through the one-way pawl 453, and the one-way ratchet 452 drives the active straightening wheel 42 to rotate, so as to convey the wire. When the wire moves in the straightening channel 411, the first driven straightening wheel 43 and the active straightening wheel 42, and each group of second driven wheel groups straighten the wire passing through the straightening channel 411 so that the wire segments after cutting are straight.

[0062] When the push seat 221 compresses the first spring 225 to slide away from the cold heading device, the push seat 221 drives the transmission rack 222 to slide in the opposite direction, and the transmission rack 222 drives the transmission gear 451 to rotate in the opposite direction. Since the one-way pawl 453 and the one-way ratchet 452 are one-way transmission, the transmission gear 451 will not drive the one-way ratchet 452 to rotate through the one-way pawl 453 at this time, that is, the transmission gear 451 rotates idly, that is, the first driven straightening wheel 43 and the active straightening wheel 42, and each group of second driven wheel groups will not rotate, so that the wire will not be transported.

[0063] like Figures 1 to 4 、 Figure 8 、 Figure 17 and Figure 18 As shown, based on the above embodiment, the cutting seat 21 is further provided with a cutting auxiliary component; the cutting component includes a cutting cylinder 231 and a cutting tool 232; the cutting cylinder 231 is installed on the cutting seat 21, and the cutting tool 232 is slidably arranged in the cutting seat 21 and a return spring 233 is provided between the cutting seat 21; the cutting auxiliary component includes a push rod 61 vertically slidingly arranged in the cutting seat 21 and an auxiliary rod 62 rotatably arranged at the top of the cutting seat 21, the upper end of the push rod 61 is movably inserted into the auxiliary rod 62, and a fourth spring 63 is provided between the push rod 61 and the auxiliary rod 62; the upper end of the push rod 61 is provided with a second pin shaft 611, and the inner wall of the auxiliary rod 62 is provided with a second driving groove, and the second pin shaft 611 is movably embedded in the second driving groove; the upper end of the auxiliary rod 62 is provided with a swing arm 621, and the lower end of the push rod 61 is provided with a driving inclined surface 612 for cooperating with the push seat 221; the swing arm 621 can swing between the cutting cylinder 231 and the cutting tool 232. In this embodiment, the second driving groove includes a spiral section 622 and a first vertical section 623 , and the upper end of the spiral section 622 is connected to the lower end of the first vertical section 623 .

[0064] Specifically, the push rod 61 can be extended into the guide groove 217 under the elastic force of the fourth spring 63. Initially, the return spring 233 makes the cutting tool 232 located at the top dead center position. The push seat 221 contacts the driving inclined surface 612 under the elastic force of the first spring 225 and squeezes the push rod 61 to move upward, so that the fourth spring 63 is continuously compressed. During the upward movement of the push rod 61, the second pin 611 moves along the spiral section 622, thereby driving the auxiliary rod 62 to drive the swing arm 621 to rotate, so that the swing arm 621 rotates between the cutting cylinder 231 and the cutting tool 232. Figure 1 and Figure 2 As shown; when the output end of the cutting cylinder 231 extends to contact the top surface of the swing arm 621, the cutting cylinder 231 pushes the auxiliary rod 62 downward through the swing arm 621, so that the second pin 611 moves along the first vertical section 623. At the same time, the swing arm 621 squeezes the cutting tool 232 to overcome the elastic force of the return spring 233 and slide downward, thereby cutting the wire until the second pin 611 moves to the top dead center position of the first vertical section 623, thereby completely cutting the wire.

[0065] Then the cutting cylinder 231 resets, releasing the squeeze on the swing arm 621, the fourth spring 63 pushes the auxiliary rod 62 to move upward, the second pin shaft 611 moves downward along the first vertical section 623 to enter the spiral section 622, and the cutting tool 232 is reset to the top dead center position under the action of the reset spring 233. At this time, even if the cutting cylinder 231 is extended to the maximum stroke, it will not push the cutting tool 232 to move downward, so as to avoid the cutting of the wire due to misoperation.

[0066] That is to say, when cutting is required, only when the swing arm 621 rotates to between the cutting cylinder 231 and the cutting tool 232, the cutting cylinder 231 can push the cutting tool 232 to slide downward through the swing arm 621 to cut the wire.

[0067] When the cold heading device pushes the wire segment into the forming positioning hole 212, the wire segment squeezes the push shaft 2211, and the push seat 221 slides away from the cold heading device. The first spring 225 is compressed, that is, the push shaft 2211 retracts and slides. At this time, the push seat 221 gradually releases the squeeze on the driving inclined surface 612, that is, the squeeze on the push rod 61 is released. At this time, the fourth spring 63 pushes the push rod 61 to move downward, and the driving inclined surface 612 of the push rod 61 extends into the guide groove 217. At the same time, during the downward movement of the push rod 61, the second pin shaft 611 moves along the spiral section 622, driving the auxiliary rod 62 to rotate, so that the swing arm 621 moves out between the cutting cylinder 231 and the cutting tool 232, thereby cutting off the power transmission between the cutting cylinder 231 and the cutting tool 232, so that the cutting cylinder 231 cannot drive the cutting tool 232 to perform cutting operations, so as to avoid erroneous cutting operations.

[0068] like Figures 1 to 3 、 Figure 16 As shown, based on the above embodiment, further, the material moving mechanism includes a material moving cylinder 51 and a second slider 52; the base 1 is provided with a limiting platform 11, the material moving cylinder 51 is provided on the base 1, and the second slider 52 is slidably provided at the output end of the material moving cylinder 51; the side wall of the second slider 52 is provided with a third pin 521, the limiting platform 11 is provided with a limiting groove, and the third pin 521 is movably embedded in the limiting groove; the limiting groove includes an inclined section 12 and a second vertical section 13; the high end of the inclined section 12 is connected to the lower end of the second vertical section 13, and the high end of the inclined section 12 is arranged close to the forming positioning hole 212;

[0069] The top of the second slider 52 is set on the material moving support platform 522. Arc baffles 523 are provided at both ends of the material moving support platform 522. The height of one end of the material moving support platform 522 close to the forming positioning hole 212 is lower than the height of the other end.

[0070] Specifically, initially, the material moving cylinder 51 drives the second slider 52 to move to the bottom dead center position, and the third pin 521 is located at the lower end of the inclined section 12. Figure 1 As shown; after the cutting tool 232 cuts the wire of the preset length, the cut wire segment falls onto the material transfer bearing platform 522, and then the material transfer cylinder 51 pushes the second slider 52 to move upward. At this time, the third pin 521 moves along the inclined section 12, so that the second slider 52 slides horizontally toward the positioning forming hole while moving upward. At the same time, due to the inclined setting of the material transfer bearing platform 522, the wire segment abuts against the arc baffle 523 at the lower end, and the arc baffle 523 limits and centers the wire segment.

[0071] The third pin 521 enters the second vertical section 13 from the inclined section 12, and then the second slider 52 drives the material transfer platform 522 and the wire section to move upward until the wire section is coaxial with the forming positioning hole 212, thereby realizing the material transfer of the wire section. Figure 2 As shown;

[0072] After the cold heading device pushes the wire segment into the forming positioning hole 212 , the material moving cylinder 51 drives the second slide block 52 to move downward until the material moving support platform 522 returns to its initial position.

[0073] like Figures 1 to 4 、 Figure 14 and Figure 15As shown, based on the above embodiment, further, the cold heading device includes a cold heading cylinder 31, a mold mounting base 32, a first mold 33 and a second mold 34; the mold mounting base 32 has a center shaft 321; the output end of the cold heading cylinder 31 is provided with a center hole 311; the center shaft 321 is slidably inserted into the center hole 311 and a fifth spring 35 is provided between the center shaft 321 and the mold mounting base 32; a third drive groove is provided on the outer wall of the center shaft 321, and a fourth pin 36 is elastically provided on the inner wall of the center hole 311; the fourth pin 36 is movably embedded in the third drive groove; the third drive groove includes a plurality of straight grooves 322 and spiral grooves 323 that are alternately connected end to end; thrust steps are provided at both ends of the straight groove 322.

[0074] Specifically, initially, the fourth pin 36 is located in the linear groove 322, and the position of the first die 33 corresponds to the position of the positioning forming hole; the cold heading cylinder 31 drives the die mounting seat 32 to extend toward the wire segment through the fifth spring 35 until the first die 33 contacts the wire segment. As the die mounting seat 32 continues to extend, relative movement occurs between the die mounting seat 32 and the cold heading cylinder 31, the fifth spring 35 is compressed, and the fourth pin 36 moves along the linear groove 322 until the fourth pin 36 enters the spiral groove 323. At this time, the fourth pin 36 is blocked by the thrust step and cannot return to the linear groove 322. At this time, the die mounting seat 32 and the cold heading cylinder 31 are relatively stationary and continue to push the wire segment into the forming positioning hole 212. After the wire segment is inserted into place, the first die 33 performs the first cold heading forming on the wire segment;

[0075] After completing the first cold heading, the cold heading cylinder 31 drives the die mounting seat 32 to move away from the wire segment until the fifth spring 35 gradually resets, until the first die 33 is completely separated from the wire segment. During the reset process of the fifth spring 35, the fourth pin 36 moves along the spiral groove 323, thereby driving the die rotating seat to rotate relative to the cold heading cylinder 31 until the fourth pin 36 enters the next linear groove 322 from the spiral groove 323. The thrust step blocks the fourth pin 36 from returning to the spiral groove 323. At this time, the die rotating seat drives the first die 33 and the second die 34 to rotate 180 degrees, so that the second die 34 corresponds to the position of the forming positioning hole 212, and then the cold heading cylinder 31 drives the die mounting seat 32 to move toward the wire segment again, so that the second die 34 performs a second cold heading on the wire segment.

[0076] like Figures 1 to 4 As shown, based on the above embodiment, the base 1 is further provided with a blanking assembly between the cold heading device and the positioning forming hole; the screws formed by cold heading are transferred out of the working area by providing the blanking assembly.

[0077] Specifically, the blanking assembly includes a blanking plate 71 and a sixth spring (not shown). Blanking plate 71 is mounted on base 1 and is tilted. Its top surface is inclined, with the upper end of the inclined surface positioned adjacent to the material-moving mechanism. The sixth spring is connected between the bottom surface of blanking plate 71 and base 1. During cold heading, the cold heading device applies downward pressure to blanking plate 71, compressing the sixth spring. After cold heading, the cold heading device releases pressure on blanking plate 71, causing the sixth spring to return to its original position and push blanking plate 71 upward, allowing the screw to move out of the work area along the inclined surface of blanking plate 71.

[0078] In this embodiment, a seventh spring (not shown in the figure) is connected between the first pin shaft 224 and the first slider 223. By providing the seventh spring, the first pin shaft 224 is kept in engagement with the first driving groove. Figure 14 As shown, an eighth spring 37 is connected between the fourth pin shaft 36 and the mold mounting seat 32; by providing the eighth spring 37, the fourth pin shaft 36 maintains the cooperation with the third driving groove.

[0079] The above is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the protection scope of the patent application of the present invention.

Claims

1. A wire cutting machine for screw production, characterized in that: It includes a base, a feeding and cutting device arranged at one end of the base, and a cold heading device arranged at the other end of the base; The feeding and cutting device comprises a cutting seat, which is provided with a straightening slot and a forming positioning hole; the cutting seat is provided with a pushing mechanism on one side of the straightening slot; the pushing mechanism is provided with a pushing shaft, which is slidably arranged in the forming positioning hole; the cutting seat is provided with a cutting assembly; The base is provided with a straightening device at a position corresponding to the straightening slot; the straightening device is provided with a straightening channel; the straightening device is connected to the pushing mechanism in a one-way transmission manner; the base is provided with a material moving mechanism at a position corresponding to the straightening channel; The pushing mechanism includes a pushing seat slidably arranged on the cutting seat, a transmission rack arranged on the pushing seat, a first slider slidably arranged on the pushing seat, a first pin elastically arranged on the first slider, and a first spring arranged in the forming positioning hole; a second spring is arranged between the first slider and the pushing seat; the pushing shaft is arranged at one end of the pushing seat close to the straightening device; the transmission rack is connected to the straightening device in a one-way transmission manner; The cutting seat is provided with a first driving groove; the first pin is movably embedded in the first driving groove, and the first pin cooperates with the first driving groove to unlockably lock the thrust seat; The first driving groove includes a first inclined groove, a second inclined groove, a third inclined groove, and a fourth inclined groove connected end to end in sequence; a blocking step is provided between the first inclined groove and the fourth inclined groove, and a transition inclined surface is provided in the first inclined groove; the first inclined groove and the fourth inclined groove, and the second inclined groove and the third inclined groove are all connected in a V-shape, and the connection between the two forms a locking point; A receiving groove is provided on one side of the straightening groove, and a one-way transmission assembly is provided in the receiving groove; the one-way transmission assembly includes a transmission gear, a one-way ratchet and a one-way pawl; the transmission gear is rotatably arranged in the receiving groove, and a mounting groove is provided on the disk surface of the transmission gear; the one-way ratchet is connected to the straightening device and is arranged in the mounting groove; the one-way pawl is slidably arranged on the groove wall of the mounting groove and is connected to the transmission gear by a third spring; the one-way pawl is engaged with the one-way ratchet in one-way transmission under the elastic force of the third spring; The straightening device includes a straightening seat, an active straightening wheel, a first driven straightening wheel and multiple groups of second driven straightening wheels; the straightening seat is penetrated by a straightening channel; the active straightening wheel is rotatably arranged below the straightening channel, and the first driven straightening wheel is rotatably arranged above the straightening channel and is located directly above the active straightening wheel; each group of second driven straightening wheels includes two second driven straightening wheels oppositely arranged on both sides of the straightening channel; at least one group of second driven straightening wheels is vertically rotatably arranged on the left and right sides of the straightening channel, and at least one group of second driven straightening wheels is horizontally rotatably arranged on the upper and lower sides of the straightening channel; The one-way ratchet is fixedly connected to the active straightening wheel.

2. A wire cutting machine for screw production according to claim 1, characterized in that: The cutting seat is provided with a guide groove on one side of the straightening groove, and the push seat is slidably arranged in the guide groove; the first sliding block is arranged on the top surface of the push seat, and the first driving groove is arranged on the inner top wall of the guide groove.

3. The wire cutting machine for screw production according to claim 1, characterized in that: The cutting seat is provided with a cutting auxiliary assembly; the cutting assembly includes a cutting cylinder and a cutting tool; the cutting cylinder is mounted on the cutting seat, the cutting tool is slidably arranged on the cutting seat and a reset spring is provided between the cutting seat; The cutting auxiliary assembly includes a push rod vertically slidingly arranged in the cutting seat and an auxiliary rod rotatably arranged on the top of the cutting seat. The upper end of the push rod is movably inserted into the auxiliary rod, and a fourth spring is provided between the push rod and the auxiliary rod; a second pin shaft is provided at the upper end of the push rod, and a second drive groove is provided on the inner wall of the auxiliary rod, and the second pin shaft is movably embedded in the second drive groove; a swing arm is provided at the upper end of the auxiliary rod, and a drive inclined surface for cooperating with the push seat is provided at the lower end of the push rod; the swing arm can swing between the cutting cylinder and the cutting tool.

4. A wire cutting machine for screw production according to claim 3, characterized in that: The second driving groove includes a spiral section and a first vertical section, and the upper end of the spiral section is connected to the lower end of the first vertical section.

5. The wire cutting machine for screw production according to claim 1, characterized in that: The material moving mechanism includes a material moving cylinder and a second slider; the base is provided with a limit platform, the material moving cylinder is provided on the base, and the second slider is slidably provided on the output end of the material moving cylinder; the side wall of the second slider is provided with a third pin shaft, the limit platform is provided with a limit groove, and the third pin shaft is movably embedded in the limit groove; the limit groove includes an inclined section and a second vertical section; the high end of the inclined section is connected to the lower end of the second vertical section, and the high end of the inclined section is arranged close to the forming positioning hole; The top of the second sliding block is arranged on the material moving bearing platform. Both ends of the material moving bearing platform are provided with arc baffles, and the height of one end of the material moving bearing platform close to the forming positioning hole is lower than the height of the other end.

6. A wire cutting machine for screw production according to claim 1, characterized in that: The cold heading device includes a cold heading cylinder, a die mounting base, a first die, and a second die; the die mounting base has a central shaft; an output end of the cold heading cylinder is provided with a central hole; the central shaft is slidably inserted into the central hole and a fifth spring is provided between the central shaft and the die mounting base; a third driving groove is provided on the outer wall of the central shaft, and a fourth pin is elastically provided on the inner wall of the central hole; the fourth pin is movably embedded in the third driving groove; The third driving groove includes a plurality of linear grooves and spiral grooves which are alternately connected end to end; thrust steps are provided at both ends of the linear grooves.

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