Wire cutting machine for screw production

Abstract

The invention discloses a wire cutting machine for screw production. The wire cutting machine comprises a base, a feeding 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 base, and the cutting base is provided with a straightening groove position and a forming positioning hole. The cutting seat is provided with a material pushing mechanism on one side of the straightening slot position; the pushing mechanism is provided with a pushing shaft which is arranged in the forming positioning hole in a sliding mode. The cutting base is provided with a cutting assembly. A straightening device is arranged at the position, corresponding to the straightening groove position, of the base; the straightening device is provided with a straightening channel; the straightening device is in one-way transmission connection with the pushing mechanism; a material moving mechanism is arranged at the position, corresponding to the straightening channel, of the base; continuous production of screws is achieved, so that the production efficiency is improved, the coordination time of cutting and cold heading is effectively shortened, and the consistency of products is better.

Description

Technical Field

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

[0002] In the field of screw production, in the traditional process, wire cutting and cold heading are usually completed by two independent mechanical devices. This process involves multiple operation links and relies on a feeding mechanism to transport the cut wire segments to the cold heading device.

[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, so the production efficiency of the screws is improved. 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 scheme of the present invention is as follows: A wire cutting machine for screw production comprises 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 material pushing mechanism in a one-way transmission; the base is provided with a material moving mechanism at a position corresponding to the straightening channel.

[0006] The present invention further comprises a pusher seat slidably arranged on the cutting seat, a transmission rack arranged on the pusher seat, a first slider slidably arranged on the pusher 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 pusher seat; the pusher shaft is arranged at one end of the pusher 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 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.

[0007] 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 bevel is provided in the first bevel groove; the first bevel groove and the fourth bevel groove, and 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.

[0008] The present invention further comprises 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 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.

[0009] The present invention further comprises a receiving groove on one side of the straightening groove, and a one-way transmission assembly is arranged in the receiving groove; the one-way transmission assembly comprises 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 arranged on the disk surface of the transmission gear; the one-way ratchet is connected to the straightening device and 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 meshed with the one-way ratchet in one-way transmission under the elastic force of the third spring.

[0010] The present invention further comprises 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 through it; the active straightening wheel is rotatably arranged below the straightening channel, 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 comprises two second driven straightening wheels relatively 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.

[0011] 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 arranged between the cutting seat and the cutting tool; The cutting auxiliary component includes a push rod vertically slidably 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 arranged between the push rod and the auxiliary rod; a second pin shaft is arranged at the upper end of the push rod, and a second driving groove is arranged on the inner wall of the auxiliary rod, and the second pin shaft is movably embedded in the second driving groove; a swing arm is arranged at the upper end of the auxiliary rod, and a driving inclined surface for cooperating with the push seat is arranged at the lower end of the push rod; the swing arm can swing between the cutting cylinder and the cutting tool.

[0012] 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.

[0013] The present invention further comprises a material shifting mechanism comprising a material shifting cylinder and a second slider; a base is provided with a limiting platform, the material shifting cylinder is provided on the base, and the second slider is slidably provided at the output end of the material shifting 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 provided close to the forming positioning hole; The top of the second sliding block is arranged on the material transfer bearing platform. Arc baffles are arranged at both ends of the material transfer bearing platform. The height of one end of the material transfer bearing platform close to the forming positioning hole is lower than the height of the other end.

[0014] The present invention further comprises a cold heading device comprising a cold heading oil cylinder, a die mounting seat, a first die and a second die; the die mounting seat has a central axis; a central hole is provided at the output end of the cold heading oil cylinder; the central axis is slidably inserted into the central hole and a fifth spring is provided between the central axis and the die mounting seat; a third driving groove is provided on the outer wall of the central axis, 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 comprises a plurality of linear grooves and spiral grooves which are alternately connected end to end; thrust steps are arranged at both ends of the linear grooves.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 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 to unload the material and the straightening device is used to automatically feed and straighten the material, so as to realize the continuous production of screws, thereby improving the production efficiency, effectively reducing the coordination time of cutting and cold heading, and making the product consistency better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the structure of the present invention when the wire section and the forming positioning hole are coaxial; Figure 3 It is a schematic diagram of the structure of the wire section of the present invention being pushed into the forming positioning hole; Figure 4 This is a schematic diagram of the structure of the present invention after the cutting seat is hidden; Figure 5 It is a structural schematic diagram of the material pushing mechanism of the present invention; Figure 6 yes Figure 5 A local enlarged schematic diagram of point I in the middle; Figure 7 It is a structural schematic diagram of the material pushing mechanism of the present invention from another perspective; Figure 8 It is a schematic structural diagram of the cutting seat of the present invention; Fig. 9 is a schematic structural diagram of the cutting seat of the present invention from another viewing angle; Fig.10 yes Fig. 9 A partial enlarged schematic diagram of position II in the middle; Fig.11 It is a structural schematic diagram of the straightening device of the present invention; Fig.12 It is a schematic diagram of the structure of the straightening device of the present invention after the straightening seat is hidden; Fig.13 is an exploded schematic diagram of a one-way transmission assembly of the present invention; Fig.14 It is an exploded schematic diagram of the cold heading device of the present invention; Fig.15 It is a structural schematic diagram of the mold mounting seat of the present invention; Fig.16 It is a structural schematic diagram of the material transfer mechanism of the present invention; Fig.17 is an exploded schematic diagram of the cutting auxiliary assembly of the present invention; Fig.18 is a cross-sectional schematic diagram of a cutting auxiliary assembly of the present invention; Description 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 shaft; 225, first spring; 226, second spring; 231, cutting cylinder; 232, cutting tool; 233, reset spring; 31, cold heading 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. Unloading plate. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation scope of the present invention is not limited thereto.

[0018] like Figures 1 to 18 As shown, a wire cutting machine for screw production described in this embodiment includes a base 1, a feeding and cutting device arranged at one end of the base 1, and a cold heading device arranged at the other end of the base 1; The feeding and cutting device comprises a cutting seat 21, which is provided with a straightening slot 211 and a forming positioning hole 212; the cutting seat 21 is provided with a pushing mechanism on one side of the straightening slot 211; the pushing mechanism is provided with a pushing shaft 2211, and the pushing shaft 2211 is slidably arranged in the forming positioning hole 212; the cutting seat 21 is provided with a cutting assembly; 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 material 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 .

[0019] 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 a preset length, and the cutting assembly cuts the wire that passes through. The cut wire segment is inserted into the material moving mechanism, and 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 to slide until the wire segment is pushed into place, and the cold heading device cold heads the wire segment to form a screw; after cold heading, the cold heading device is reset, and the push mechanism drives the push shaft 2211 to reset, and the screw formed by cold heading is removed from the forming positioning hole 212, thus completing the production of a screw; 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.

[0020] 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 for cold heading through 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 to unload the material and the straightening device is used to automatically feed and straighten the material, so as to realize the continuous production of screws, thereby improving production efficiency, effectively reducing the coordination time of cutting and cold heading, and making the product consistency better.

[0021] like Figures 1 to 7 As shown, based on the above embodiment, further, the pushing mechanism 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 arranged between the first slider 223 and the pushing seat 221; a pushing shaft 2211 is arranged 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 in FIG. Figures 8 to 10 As shown, the cutting seat 21 is provided with a first driving groove; the first pin shaft 224 is movably embedded in the first driving groove, and the first pin shaft 224 cooperates with the first driving groove to unlockably lock the thrust seat 221. Fig.10As shown, in this embodiment, the first driving groove includes a first inclined groove 213, a second inclined groove 214, a third inclined groove 215 and a fourth inclined groove 216 which are connected end to end in sequence; a blocking step is provided between the first inclined groove 213 and the fourth inclined groove 216 to prevent the first pin shaft 224 from entering the fourth inclined groove 216 from the first inclined groove 213; a transition inclined surface is provided in the first inclined groove 213; the first inclined groove 213 and the fourth inclined groove 216, the second inclined groove 214 and the third inclined groove 215 are all connected in a V-shape, and a locking point is formed at the connection between the two.

[0022] Specifically, for ease of explanation, Fig.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 molded positioning hole 212, the first pin shaft 224 is located at point A, and the second spring 226 is in a compressed state.

[0023] 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 extrude the push shaft 2211, and the push seat 221 slides away from the cold heading device, and the first spring 225 is compressed, that is, the push shaft 2211 retracts and slides, and at this time, the first pin shaft 224 moves from the first inclined groove 213 of the eye at point A until the first pin shaft 224 moves to point B, at which time the wire segment is pushed into place, and then the cold heading device performs the first cold heading forming on the wire segment, and then the cold heading device releases the extrusion of the wire segment, and at this time, the first spring 225 pushes the push shaft 2211 to slide toward the cold heading device, and the first slider 223 drives the first pin shaft 224 to move under the elastic force of the second spring 226, so that the first pin shaft 224 moves from point B along the second inclined groove 214 to point C, and at this time, the first pin shaft 224 cooperates with the locking point to lock the push seat 221; Then the cold heading device squeezes the wire section again, and the first slider 223 drives the first pin shaft 224 to move under the elastic force of the second spring 226, so that the first pin shaft 224 moves from point C along the third inclined groove 215 to point D, thereby unlocking the push seat 221. At this time, the wire section is pushed into place again, and then the cold heading device performs a second cold heading forming on the wire section. The wire section formed by the second cold heading is formed into a screw, and then the cold heading device is reset to release the squeezing of the screw. At this time, the first spring 225 is reset to push the push seat 221 to move 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, so that the wire of the preset length protrudes out of the straightening channel 411 and the wire is straightened; then the cutting component cuts the wire of the preset length, and the above process is repeated, and the wire cutting and cold heading forming process are continuously performed to improve production efficiency and improve product consistency.

[0024] like Figure 4 , Figure 8 and Fig. 9 As shown, based on the above embodiment, further, the cutting seat 21 is provided with a guide groove 217 on one side of the straightening slot 211, and the push seat 221 is slidably arranged in the guide groove 217; the first slider 223 is arranged on the top surface of the push seat 221, and the first driving groove is arranged on the inner top wall of the guide groove 217. In this embodiment, the guide groove 217 is arranged to provide guidance and limit for the push seat 221, so that the movement of the push seat 221 is more stable.

[0025] 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 groove 211, and a one-way transmission component is provided in the receiving groove 218; the one-way transmission component 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 with the transmission gear 451 by 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.

[0026] Specifically, the third spring 454 makes the one-way pawl 453 maintain a tendency to mesh 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, 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 straightening device to work, thereby realizing the conveying and straightening processing of the wire; 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 there is a one-way transmission between the one-way pawl 453 and the one-way ratchet 452, the transmission gear 451 will not drive the one-way ratchet 452 to rotate through the one-way pawl 453, that is, the transmission gear 451 rotates idly to ensure the consistency of the wire cutting length.

[0027] like Figures 1 to 4 , Fig.11 and Fig.12 As shown, based on the above embodiment, further, the straightening device 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 rotatably 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 rotatably 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.

[0028] Specifically, Fig.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 rotatable 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, and one group of second driven straightening wheels 44 is arranged on the upper and lower sides of the straightening channel 411 in a horizontally rotatable manner.

[0029] 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, 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 ratchet 453, and the one-way ratchet 452 drives the active straightening wheel 42 to rotate to transport the wire. During the movement of the wire 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 segment after cutting is straight. 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 transmission is between the one-way pawl 453 and the one-way ratchet 452, 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 idles, that is to say, 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.

[0030] like Figures 1 to 4 , Figure 8 , Fig.17 and Fig.18 As shown, based on the above embodiment, further, the cutting seat 21 is 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, the cutting tool 232 is slidably arranged on the cutting seat 21 and a reset spring 233 is arranged between the cutting seat 21; the cutting auxiliary component includes a push rod 61 vertically slidably arranged in the cutting seat 21 and an auxiliary rod 62 rotatably arranged on 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 arranged between the push rod 61 and the auxiliary rod 62; a second pin shaft 611 is arranged at the upper end of the push rod 61, and a second driving groove is arranged on the inner wall of the auxiliary rod 62, and the second pin shaft 611 is movably embedded in the second driving groove; a swing arm 621 is arranged at the upper end of the auxiliary rod 62, and a driving inclined surface 612 for cooperating with the push seat 221 is arranged at the lower end of the push rod 61; 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 segment 622 and a first vertical segment 623 , and the upper end of the spiral segment 622 is connected to the lower end of the first vertical segment 623 .

[0031] Specifically, the push rod 61 can extend into the guide groove 217 under the elastic force of the fourth spring 63. Initially, the reset 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 continues to be 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 to between the cutting cylinder 231 and the cutting tool 232, as shown in FIG. 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 shaft 611 moves along the first vertical section 623, and 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 shaft 611 moves to the top dead center position of the first vertical section 623, thereby completely cutting the wire; Then the cutting cylinder 231 resets and releases the squeeze on the swing arm 621. The fourth spring 63 pushes the auxiliary rod 62 to move upward, and the second pin shaft 611 moves downward along the first vertical section 623 to enter the spiral section 622. 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 cutting of the wire due to misoperation.

[0032] 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.

[0033] 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 shrinks and slides. At this time, the push seat 221 gradually releases the squeezing of the driving inclined surface 612, that is, releases the squeezing of the push rod 61. 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 a cutting operation, so as to avoid an erroneous cutting operation.

[0034] like Figures 1 to 3 , Fig.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 arranged on the base 1, and the second slider 52 is slidably arranged at the output end of the material moving cylinder 51; the side wall of the second slider 52 is provided with a third pin shaft 521, the limiting platform 11 is provided with a limiting groove, and the third pin shaft 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; The top of the second sliding block 52 is disposed on a material transfer platform 522 . Arc baffles 523 are disposed at both ends of the material transfer platform 522 . The height of one end of the material transfer platform 522 close to the molding positioning hole 212 is lower than the height of the other end.

[0035] Specifically, initially, the material transfer cylinder 51 drives the second slide block 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 off 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, and 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; 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; After the cold heading device pushes the wire section into the forming positioning hole 212 , the material moving cylinder 51 drives the second slide block 52 to move downward until the material moving bearing platform 522 is reset to the initial position.

[0036] like Figures 1 to 4 , Fig.14 and Fig.15As shown, based on the above embodiment, further, the cold heading device includes a cold heading cylinder 31, a mold mounting seat 32, a first mold 33 and a second mold 34; the mold mounting seat 32 has a center axis 321; a center hole 311 is provided at the output end of the cold heading cylinder 31; the center axis 321 is slidably inserted into the center hole 311 and a fifth spring 35 is provided between the center axis 321 and the mold mounting seat 32; a third driving groove is provided on the outer wall of the center axis 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 driving groove; the third driving groove includes a plurality of straight grooves 322 and spiral grooves 323 which are alternately connected end to end in sequence; thrust steps are provided at both ends of the straight groove 322.

[0037] 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 which time the fourth pin 36 is blocked by the thrust step and cannot return to the linear groove 322, at which 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, until the wire segment is inserted into place, and the first die 33 performs the first cold heading forming on the wire segment; 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 is gradually reset, 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, and 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.

[0038] like Figures 1 to 4 As shown, based on the above embodiment, further, the base 1 is 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.

[0039] Specifically, the blanking assembly includes a blanking plate 71 and a sixth spring (not shown in the figure); the blanking plate 71 is arranged on the base 1 for lifting, and the top surface of the blanking plate 71 is an inclined surface, and the high end of the inclined surface is arranged close to the material moving mechanism; the sixth spring is connected between the bottom surface of the blanking plate 71 and the base 1. When cold heading is performed, the cold heading device applies downward pressure to the blanking plate 71, so that the sixth spring is compressed. After cold heading, the cold heading device releases the pressure on the blanking plate 71, and the sixth spring is reset, pushing the blanking plate 71 upward, so that the screw moves out of the working area along the inclined surface of the blanking plate 71.

[0040] 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 cooperation with the first driving groove. Fig.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.

[0041] 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 material pushing mechanism in a one-way transmission; the base is provided with a material moving mechanism at a position corresponding to the straightening channel.

2. A wire cutting machine for screw production according to claim 1, characterized in that: The pushing mechanism comprises 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 shaft 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 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.

3. A wire cutting machine for screw production according to claim 2, characterized in that: The first driving groove includes a first inclined groove, a second inclined groove, a third inclined groove and a fourth inclined groove which are 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, the second inclined groove and the third inclined groove are all connected in a V shape, and a locking point is formed at the connection between the two.

4. A wire cutting machine for screw production according to claim 2, 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.

5. A wire cutting machine for screw production according to claim 2, characterized in that: 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 a third spring is connected between the one-way pawl and the transmission gear; the one-way pawl is meshed with the one-way ratchet in one-way transmission under the elastic force of the third spring.

6. A wire cutting machine for screw production according to claim 5, characterized in that: The straightening device comprises 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 through it; 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 comprises two second driven straightening wheels which are relatively 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.

7. A wire cutting machine for screw production according to claim 2, 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 installed on the cutting seat, the cutting tool is slidably arranged on the cutting seat and a reset spring is arranged between the cutting seat; The cutting auxiliary component includes a push rod vertically slidably 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 arranged between the push rod and the auxiliary rod; a second pin shaft is arranged at the upper end of the push rod, and a second driving groove is arranged on the inner wall of the auxiliary rod, and the second pin shaft is movably embedded in the second driving groove; a swing arm is arranged at the upper end of the auxiliary rod, and a driving inclined surface for cooperating with the push seat is arranged at the lower end of the push rod; the swing arm can swing between the cutting cylinder and the cutting tool.

8. A wire cutting machine for screw production according to claim 7, 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.

9. A wire cutting machine for screw production according to claim 1, characterized in that: The material shifting mechanism comprises a material shifting cylinder and a second slider; a base is provided with a limiting platform, the material shifting cylinder is provided on the base, and the second slider is slidably provided at the output end of the material shifting 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 provided close to the forming positioning hole; The top of the second sliding block is arranged on the material transfer bearing platform. Arc baffles are arranged at both ends of the material transfer bearing platform. The height of one end of the material transfer bearing platform close to the forming positioning hole is lower than the height of the other end.

10. A wire cutting machine for screw production according to claim 1, characterized in that: The cold heading device comprises a cold heading oil cylinder, a die mounting seat, a first die and a second die; the die mounting seat has a central axis; a central hole is provided at the output end of the cold heading oil cylinder; the central axis is slidably inserted into the central hole and a fifth spring is provided between the central axis and the die mounting seat; a third driving groove is provided on the outer wall of the central axis, 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 comprises a plurality of linear grooves and spiral grooves which are alternately connected end to end; thrust steps are arranged at both ends of the linear grooves.

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