A screw cold header cutting mechanism

Abstract

The application provides a screw cold header cutting mechanism and belongs to the technical field of cold headers. The device comprises a supporting seat, a fixed rail, a rotating ring, a cutting assembly, an extrusion assembly, a driving assembly and a stabilizing assembly. The fixed rail is fixedly connected with the supporting seat, and the inner wall of the fixed rail is in an irregular circular contour structure. The rotating ring is sleeved on the outside of the fixed rail. Two cutting assemblies are symmetrically arranged on the inside of the rotating ring, and the two cutting assemblies can rotate around the circumference of the rotating ring. Each cutting assembly comprises a cutting knife, and the two cutting knife edges are opposite to each other and form a spacing for accommodating the blank. Two extrusion assemblies are connected with each cutting assembly. Each extrusion assembly slides along the irregular inner wall of the fixed rail, and the spacing between the two cutting knives changes regularly. The device uniformly applies force to shear around the blank through circumferential rotation, reduces stress concentration, reduces the tearing zone of the blank cross section, eliminates radial burrs, and improves the flatness of the sheared end face.

Description

Technical Field

[0001] This application relates to the field of cold heading machine technology, and more specifically, to a cutting mechanism for a screw cold heading machine. Background Technology

[0002] Cold heading of screws is an important method for producing fasteners such as screws. It includes multiple processes such as straightening, shearing, cold heading, thread rolling, shaping, heat treatment, and surface cleaning. Among them, the shearing mechanism, as the pre-process of the cold heading equipment, is responsible for cutting the raw material into blanks of a fixed length, and then transferring them to the pressing part for pressing through the feeding mechanism.

[0003] Existing shearing mechanisms typically use electric or hydraulic power to drive a single cutter or two opposing cutters to radially compress the blank, causing the blank to fracture under unidirectional shear stress. On the one hand, the linear compression shearing method causes local tearing of the blank cross-section due to stress concentration, resulting in burrs or microcracks, or even local protrusions. On the other hand, during radial compression, the cutting edge of the fixed part of the cutter continuously compresses the blank, which can easily cause local wear of the cutter and reduce the service life of the cutter.

[0004] Therefore, there is an urgent need for a screw cold heading machine cutting mechanism that can achieve sliding cutting by radial extrusion and simultaneous blade rotation. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, this application provides a screw cold heading machine cutting mechanism that applies uniform force to shear the blank by rotating circumferentially, thereby reducing tear bands on the blank cross-section, eliminating radial burrs, and improving the flatness of the sheared end face.

[0007] This application provides a cutting mechanism for a screw cold heading machine, comprising a support base, a fixed rail, a rotating ring, a cutting assembly, an extrusion assembly, a drive assembly, and a stabilizing assembly. The fixed rail is fixedly connected to the support base, and its inner wall has an irregular circular profile. The rotating ring is sleeved on the outside of the fixed rail. Two cutting assemblies are symmetrically arranged inside the rotating ring and are capable of rotating around the circumference of the rotating ring. Each cutting assembly includes a cutter, and the two cutter blades face each other, forming a gap between them to accommodate the blank. Two extrusion assemblies are connected to each cutting assembly, and each extrusion assembly slides along the irregular inner wall of the fixed rail, driving the gap between the two cutters to change regularly. The drive assembly is disposed on the support base and is used to drive the rotating ring to rotate the two cutting assemblies around the fixed rail. The stabilizing assembly is disposed on the side of the fixed rail near the blank feed and is used to assist in clamping the blank.

[0008] In some embodiments, the device further includes: a connector connected between the fixed rail and the support base; a mounting plate disposed inside the rotating ring, with two cutting components fixedly connected to the mounting plate; and a plurality of balls evenly distributed between the rotating ring and the fixed rail.

[0009] In some embodiments, the inner wall of the fixed rail with an irregular circular profile includes: a maintaining section, the inner wall profile being arc-shaped with a constant radius; a shearing section, the inner wall profile being a gradually changing arc shape with a gradually decreasing radius; and a buffer section, the inner wall profile transitioning smoothly from the end of the shearing section to the beginning of the maintaining section with a gradually increasing radius.

[0010] In some embodiments, each of the cutting components includes: a fixed base, fixedly connected to the mounting plate; a guide post, telescopically disposed on the fixed base; a threaded sleeve, fixedly disposed on the outside of the guide post; a blade holder, fixedly disposed at the end of the guide post away from the fixed base, the cutter being fixed inside the blade holder; and two nuts, threadedly connected to the threaded sleeve.

[0011] In some embodiments, the extrusion mechanism includes: a connecting frame passing through the guide post, and two threaded sleeves disposed on both sides of the connecting frame; a connecting post fixedly connected to the connecting frame and passing through the fixed seat; a contact wheel assembly disposed at the end of the connecting post away from the connecting frame, and the fixed rail adapted to the contact wheel assembly; and a spring disposed on the connecting post and located between the fixed seat and the contact wheel assembly.

[0012] In some embodiments, the drive assembly includes: a gear ring fixedly disposed on the outer periphery of the rotating ring; a fixed frame disposed on the support base, the top of the fixed frame having a bearing seat; a gear rotatably connected to the bearing seat of the fixed frame and meshing with the gear ring; a motor disposed on the support base; and a gearbox disposed between the motor output shaft and the gear.

[0013] In some embodiments, the stabilizing component includes: a mounting bracket fixedly connected to the connector; and two clamping components symmetrically arranged on both sides of the mounting bracket.

[0014] In some embodiments, each of the clamping components includes: a rotating frame, which passes through the mounting frame and is rotatably connected to the mounting frame; a compression seat, which is fixedly connected to the rotating frame and has an arc-shaped structure; a rubber pad, which is disposed inside the compression seat; and an elastic element, which is disposed on the side of the rotating frame opposite to the compression seat and is made of an elastic rubber block.

[0015] In some embodiments, the stabilizing component further includes: a first magnet group fixedly disposed on the rotating frame; and a second magnet group fixedly disposed on the connecting frame, wherein both the first magnet group and the second magnet group include a positive magnet and a negative magnet.

[0016] In some embodiments, a protective component is further included, the protective component comprising: an upper protective cover disposed on top of the support base; and a lower protective cover disposed on bottom of the support base, wherein both the upper and lower protective covers cover the outer side of the gear ring.

[0017] Compared with the prior art, the technical solution provided in this application includes at least the following technical effects:

[0018] This application provides a screw cold heading machine cutting mechanism that uses circumferential rotation to uniformly apply force to shear the blank, reducing tear bands on the blank cross-section, eliminating radial burrs, and improving the flatness of the sheared end face. The blank is conveyed from the feed end to the inside of the fixed rail. At this time, the stabilizing component adheres to the surface of the blank, confining the blank at the center of the initial distance between the two cutters, preventing the blank from shifting due to the conveying force. The drive component is activated, driving the rotating ring to make uniform circumferential motion around the fixed rail. The two cutting components and two extrusion components connected to the rotating ring rotate synchronously around the fixed rail with the rotating ring. The end of the extrusion component always slides against the irregular inner wall of the fixed rail. Due to the inconsistent radius of the inner wall of the fixed rail, when sliding to the area where the radius decreases, the extrusion component is subjected to radial inward thrust, driving the corresponding cutting component to move towards the center. The distance between the two cutters gradually decreases. As the rotating ring continues to rotate, the cutting edge of the cutter gradually contacts the blank and applies extrusion force until the blank breaks under the combined action of the two cutters, completing the fixed-length cutting. After the cutting is completed, the rotating ring continues to rotate, and the distance between the two cutters returns to the initial state, waiting for the next cutting. The extrusion assembly slides along the irregular inner wall of the fixed rail, driving the cutter to close in a regular manner, realizing bidirectional extrusion and sliding cutting, reducing stress concentration, avoiding burrs, micro-cracks or local protrusions on the blank cross-section, and achieving a high degree of cross-sectional flatness.

[0019] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of the cutting mechanism of a screw cold heading machine according to some embodiments of this application;

[0022] Figure 2 This is a schematic diagram of the support base and fixed rail in some embodiments of this application;

[0023] Figure 3 This is a schematic diagram of the planar structure of the fixed rail according to some embodiments of this application;

[0024] Figure 4 This is a schematic diagram of the installation components according to some embodiments of this application;

[0025] Figure 5 Exploded views of the mounting components for some embodiments of this application;

[0026] Figure 6 This is a schematic diagram of the installation and cutting components according to some embodiments of this application;

[0027] Figure 7 These are schematic diagrams of the cutting and extrusion components according to some embodiments of this application;

[0028] Figure 8 Exploded views of the cutting and extrusion components of some embodiments of this application;

[0029] Figure 9 This is one of the structural schematic diagrams of the driving component in some embodiments of this application;

[0030] Figure 10 This is a second schematic diagram of the structure of the driving component in some embodiments of this application;

[0031] Figure 11 This is a schematic diagram of the structure of the protective components according to some embodiments of this application;

[0032] Figure 12 A top view of a stable component according to some embodiments of this application;

[0033] Figure 13 This is a schematic diagram of the structure of a stable component according to some embodiments of this application;

[0034] Figure 14 This is an exploded view of a stable component for some embodiments of this application.

[0035] in, Figures 1 to 14 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0036] 100. Mounting component; 110. Support base; 120. Connector; 130. Fixed rail; 140. Rotating ring; 150. Mounting plate; 160. Ball bearing;

[0037] 200. Cutting assembly; 210. Mounting base; 220. Guide post; 230. Threaded sleeve; 240. Tool holder; 250. Cutting blade; 260. Nut;

[0038] 300. Extrusion assembly; 310. Connecting frame; 320. Connecting column; 330. Contact wheel assembly; 340. Spring;

[0039] 400. Drive assembly; 410. Gear ring; 420. Mounting bracket; 430. Gear; 440. Motor; 450. Gearbox;

[0040] 500. Protective components; 510. Upper protective cover; 520. Lower protective cover;

[0041] 600, Stabilizing component; 610, Mounting bracket; 620, Rotating bracket; 630, Pressing seat; 640, Rubber pad; 650, Elastic element; 660, First magnet group; 670, Second magnet group. Detailed Implementation

[0042] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0043] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0044] The following reference Figures 1 to 14 This application describes a screw cold heading machine cutting mechanism provided according to some embodiments.

[0045] like Figures 1 to 4 As shown, the screw cold heading machine cutting mechanism provided according to some embodiments of this application includes a support base 110, a fixed rail 130, a rotating ring 140, a cutting assembly 200, a pressing assembly 300, a driving assembly 400, and a stabilizing assembly 600. The system includes: a fixed rail 130 fixedly connected to a support base 110, with an irregular circular outline on its inner wall; a rotating ring 140 sleeved on the outside of the fixed rail 130; two cutting components 200 symmetrically arranged inside the rotating ring 140, capable of rotating around the circumference of the rotating ring 140, each including a cutter 250 with opposite blades forming a gap for accommodating the blank; two extrusion components 300 connected to each cutting component 200, each sliding along the irregular inner wall of the fixed rail 130 to drive the gap between the two cutters 250 to change regularly; a driving component 400 mounted on the support base 110 to drive the rotating ring 140 to rotate the two cutting components 200 around the fixed rail 130; and a stabilizing component 600 mounted on the side of the fixed rail 130 near the blank feed to assist in clamping the blank.

[0046] In this embodiment, the blank is conveyed from the feed end to the inner side of the fixed rail 130. At this time, the stabilizing component 600 is in contact with the surface of the blank, confining the blank at the center of the initial distance between the two cutters 250, preventing the blank from shifting due to the conveying force. The driving component 400 is activated, driving the rotating ring 140 to perform uniform circular motion around the fixed rail 130. The two cutting components 200 and the two extrusion components 300 connected to the rotating ring 140 rotate synchronously around the fixed rail 130 with the rotating ring 140. The end of the extrusion component 300 is always in contact with the irregular inner wall of the fixed rail 130. During sliding, due to the inconsistent inner radii of the fixed rail 130, when sliding to the area where the radius decreases, the extrusion assembly 300 is subjected to radial inward thrust, which drives the corresponding cutting assembly 200 to move towards the center. The distance between the two cutters 250 gradually decreases. As the rotating ring 140 continues to rotate, the cutting edge of the cutter 250 gradually contacts the blank and applies extrusion force until the blank breaks under the combined action of the two cutters 250, completing the fixed-length cutting. After the cutting is completed, the rotating ring 140 continues to rotate, and the distance between the two cutters 250 returns to the initial state, waiting for the next cutting.

[0047] In this design, the extrusion assembly 300 slides along the irregular inner wall of the fixed rail 130, driving the cutter 250 to close in a regular manner, achieving radial extrusion while the blade slides and cuts, reducing stress concentration, avoiding burrs, microcracks or local protrusions on the blank cross-section, and achieving a high degree of cross-sectional flatness.

[0048] In some possible embodiments, such as Figures 2 to 5 As shown, it also includes: a connector 120 connected between the fixed rail 130 and the support base 110; a mounting plate 150 disposed inside the rotating ring 140, with two cutting components 200 fixedly connected to the mounting plate 150; and multiple balls 160 evenly distributed between the rotating ring 140 and the fixed rail 130.

[0049] In this embodiment, the mounting plate 150 is nested inside the rotating ring 140, and the mounting plate 150 can rotate synchronously with the rotating ring 140. The fixed rail 130 is fixed to the support base 110 through the connector 120. The inner ring groove of the rotating ring 140 forms an annular gap with the outer wall of the fixed rail 130. The inner ring is provided with ball bearings 160, which can reduce the frictional resistance and wear between the fixed rail 130 and the rotating ring 140, and avoid scratches or wear dents on the outer wall of the fixed rail 130 or the inner wall of the rotating ring 140 after long-term operation.

[0050] It should be noted that the support base 110, connector 120, fixed rail 130, rotating ring 140, mounting plate 150 and ball bearing 160 together constitute the mounting assembly 100.

[0051] In some possible embodiments, such as Figure 3As shown, the irregular circular contour inner wall of the fixed rail 130 includes: a maintaining section, the inner wall contour is arc-shaped and the radius remains unchanged; a shearing section, the inner wall contour is a gradually changing arc shape and the radius gradually decreases; and a buffer section, the inner wall contour transitions smoothly from the end of the shearing section to the beginning of the maintaining section and the radius gradually increases.

[0052] In this embodiment, the inner wall contour of the holding section is a standard arc shape, and its radius is the maximum radius of the inner wall of the fixed rail 130. This radius is designed according to the blank diameter and the maximum opening requirement of the cutter 250 to ensure that the blank can smoothly enter the gap between the two cutters 250. The inner wall contour of the shearing section is a gradually decreasing arc shape, connecting to the end of the holding section. Its radius starts from the maximum radius of the holding section and gradually decreases along the circumferential direction. When the extrusion assembly 300 slides from the holding section into the shearing section, the gradual decrease in the inner wall radius will exert a force on the extrusion assembly 300 towards the central axis of the fixed rail 130. Radial thrust is transmitted to the cutting assembly 200 through the extrusion assembly 300, driving the two cutters 250 to approach the blank synchronously in the radial direction. As the radius decreases uniformly, the closing speed and extrusion force of the cutters 250 gradually increase, causing the blank to break under progressive extrusion, avoiding tearing or burr formation due to instantaneous stress concentration. The inner wall contour of the buffer section connects the end of the shearing section and the beginning of the holding section, forming a smooth transition arc, so that the radial thrust on the extrusion assembly 300 gradually disappears, preventing the cutters 250 from cracking due to instantaneous stress changes.

[0053] In some possible embodiments, such as Figures 6 to 8 As shown, each cutting assembly 200 includes: a fixed base 210, fixedly connected to the mounting plate 150; a guide post 220, telescopically mounted on the fixed base 210; a threaded sleeve 230, fixedly mounted on the outside of the guide post 220; a blade holder 240, fixedly mounted at the end of the guide post 220 away from the fixed base 210, with a cutter 250 fixed inside the blade holder 240; and two nuts 260, threadedly connected to the threaded sleeve 230. The extrusion mechanism includes: a connecting frame 310, passing through the guide post 220, with two threaded sleeves 230 disposed on both sides of the connecting frame 310; a connecting post 320, fixedly connected to the connecting frame 310 and passing through the fixed base 210; a contact wheel assembly 330, disposed at the end of the connecting post 320 away from the connecting frame 310, with a fixed rail 130 adapted to the contact wheel assembly 330; and a spring 340, disposed on the connecting post 320 and located between the fixed base 210 and the contact wheel assembly 330.

[0054] In this embodiment, based on the blank diameter, the two nuts 260 are loosened, pushing the threaded sleeve 230 to move along the connecting frame 310, adjusting the initial gap between the two cutters 250 to ensure the blank can enter smoothly. After adjustment, the nuts 260 are tightened to lock the connecting frame 310. At the same time, the spring 340 is in a compressed state, pushing the rollers of the contact wheel assembly 330 to fit against the inner wall of the fixed rail 130. The drive assembly 400 drives the rotating ring 140 to rotate, and the mounting plate 150 rotates synchronously with the rotating ring 140, thereby driving the cutting assembly 200 and the extrusion assembly 300 to rotate around the fixed rail 130. At this time, the contact wheel assembly 330 is located in the holding section of the fixed rail 130, and the two cutters 250 maintain the initial opening gap. The external feeding mechanism conveys the blank along the stabilizing assembly 600 to the gap between the cutters 250. When the rotating ring 140 drives the contact wheel assembly 330 to rotate past the holding section and enter the shearing section, the inner wall of the fixed rail 130 generates a radial force on the rollers. The thrust is transmitted to the connecting column 320, which pushes the connecting frame 310 to move along the guide column 220. The connecting frame 310 drives the guide column 220 to extend and retract towards the blank, thereby pushing the blade holder 240 and the cutter 250 closer to the blank. As the rotating ring 140 continues to rotate, the radius of the inner wall of the shearing section gradually decreases, the radial thrust gradually increases, and the extrusion force of the cutter 250 on the blank gradually increases until the blank breaks under progressive extrusion, completing the cutting action. After the cutting is completed, the contact wheel assembly 330 enters the buffer section along the rotating ring 140. The radial thrust of the inner wall of the fixed rail 130 on the roller gradually weakens. The preload of the spring 340 pushes the connecting column 320 and the contact wheel assembly 330 to move outward along the inner wall contour. The cutter 250 slowly opens. When the contact wheel assembly 330 returns to the holding section, the cutter 250 restores the initial opening gap, and the stabilizing component 600 releases the cut blank and enters the next cutting cycle.

[0055] In some possible embodiments, such as Figure 9 , Figure 10 As shown, the drive assembly 400 includes: a gear ring 410, fixedly disposed on the outer periphery of the rotating ring 140; a fixed frame 420, disposed on the support base 110, with a bearing seat on the top of the fixed frame 420; a gear 430, rotatably connected to the bearing seat of the fixed frame 420 and meshing with the gear ring 410; a motor 440, disposed on the support base 110; and a gearbox 450, disposed between the output shaft of the motor 440 and the gear 430.

[0056] In this embodiment, the motor 440 is started, and the gear 430 is driven to rotate through the gearbox 450. When the gear 430 rotates, its tooth surface precisely meshes with the tooth surface of the gear ring 410 on the outer periphery of the rotating ring 140. The rotational power is transmitted to the gear ring 410 through the squeezing force between the tooth surfaces, and the gear ring 410 drives the rotating ring 140 to rotate synchronously.

[0057] In some possible embodiments, such as Figure 13 , Figure 14 As shown, the stabilizing component 600 includes: a mounting frame 610, fixedly connected to the connector 120; two clamping components, symmetrically arranged on both sides of the mounting frame 610; each clamping component includes: a rotating frame 620, which passes through the mounting frame 610 and is rotatably connected to the mounting frame 610; a pressing seat 630, fixedly connected to the rotating frame 620, and having an arc-shaped structure; a rubber pad 640, disposed inside the pressing seat 630; an elastic element 650, disposed on the side of the rotating frame 620 away from the pressing seat 630, and made of elastic rubber block; a first magnet group 660, fixedly disposed on the rotating frame 620; and a second magnet group 670, fixedly disposed on the connector 310. Both the first magnet group 660 and the second magnet group 670 include a positive magnet and a negative magnet.

[0058] In this embodiment, initially, the connecting frame 310 is in the holding section of the fixed rail 130. The second magnet group 670 on the connecting frame 310 corresponds to the first magnet group 660 on one side of the rotating frame 620. The positive pole of the second magnet group 670 corresponds to the negative pole of the first magnet group 660, and the negative pole corresponds to the positive pole of the first magnet group 660. Opposite poles attract each other, generating a stable adsorption force. The adsorption force pulls the rotating frame 620 to rotate around the mounting frame 610, causing one end of the extrusion seat 630 to move away from the blank. Simultaneously, the elastic element 650 on the other side of the rotating frame 620 is stretched, and the rubber pad 640 is not in contact with the surface of the blank. The rotating ring 140 is driven to rotate by the driving component 400, and the connecting frame 310 rotates synchronously with the cutting component 200. At this time, the distance between the first magnet group 660 and the second magnet group 670 gradually increases until they are completely separated. At this time, the tensile force of the elastic element 650 is released, driving the rotating frame 620 to rotate around the mounting frame 610, so that the rubber pad 640 on the inner wall of the extrusion seat 630 gradually adheres to the blank. On the outer circumference, a clamping force is applied to the blank. The connecting frame 310 continues to rotate into the shearing section of the fixed rail 130. At this time, the second magnet group 670 on the connecting frame 310 moves closer to the first magnet group 660 on the other side. Due to the irregularity of the inner wall of the fixed rail 130, the positive pole of the second magnet group 670 corresponds to the positive pole of the first magnet group 660 on the other side, and the negative pole corresponds to the negative pole. Like poles repel each other, generating a repulsive force. The repulsive force prevents the second magnet group 670 from attracting the first magnet group 660 on the other side. The elastic element 650 holds... Continue to release the elastic force to keep the rotating frame 620 rotating. The clamping force of the extrusion seat 630 and the rubber pad 640 on the blank remains unchanged, ensuring that the blank has no radial offset or axial slippage when it is extruded and cut by the cutter 250. After the connecting frame 310 rotates to 360°, the blank is cut. The connecting frame 310 returns to the initial position, and the second magnet group 670 is aligned with the first magnet group 660 on the initial side again. The magnetic attraction force is restored. The rotating frame 620 rotates to move the extrusion seat 630 away from the blank and contact the clamping of the blank.

[0059] In some possible embodiments, such as Figure 11, Figure 12 As shown, it also includes a protective component 500, which includes: an upper protective cover 510 disposed on the top of the support base 110; and a lower protective cover 520 disposed on the bottom of the support base 110, and both the upper protective cover 510 and the lower protective cover 520 cover the outer side of the toothed ring 410.

[0060] In this embodiment, the toothed ring 410 is driven to rotate, and its tooth surface has sharp teeth. The upper protective cover 510 and the lower protective cover 520 are spliced ​​together and cover the outside of the toothed ring 410, which can isolate the human body or foreign objects from contact with the rotating toothed ring 410 and prevent danger.

[0061] When the cutting mechanism of the screw cold heading machine is in operation, the external feeding mechanism feeds the blank from one side of the stabilizing component 600, through the center of the mounting frame 610, until the front end reaches the preset cutting length position. By starting the motor 440, the power is transmitted to the gear 430 through the gearbox 450. The gear 430 meshes with the gear ring 410 to drive the rotating ring 140 to rotate uniformly around the fixed rail 130. The cutter 250 and the contact wheel assembly 330 rotate accordingly. When the contact wheel assembly 330 maintains a sliding section within the fixed rail 130, there is no additional radial thrust, and the cutter 250 maintains the initial gap. As the rotation progresses, the contact wheel assembly 330 enters the shearing section. The inner wall generates a radially inward thrust on the rollers. This thrust is transmitted through the connecting column 320 and the connecting frame 310 to the guide column 220, driving the two cutters 250 to approach the blank synchronously in a radial direction. Due to the uniform reduction in radius, the closure degree and extrusion pressure of the cutters 250 gradually increase, and the cutting edge gradually contacts the blank and applies pressure. At the same time, the connecting frame 310 rotates with the rotating ring 140, the second magnet group 670 separates from the initial side first magnet group 660, the magnetic attraction disappears, and the elastic element 650 releases the elastic force to drive the rotation. The moving frame 620 rotates, and the rubber pad 640 of the extrusion seat 630 adheres to the outer circumference of the blank. The clamping assemblies on both sides form a bidirectional centered clamping. When the connecting frame 310 enters the shearing section, the second magnet group 670 and the first magnet group 660 on the other side repel each other due to their similar poles, avoiding attraction and ensuring continuous clamping force to prevent the blank from shifting during cutting. As the rotating ring 140 continues to rotate, the extrusion pressure of the cutter 250 reaches the blank fracture threshold. The blank breaks smoothly under the bidirectional extrusion, completing the fixed-length cutting. After cutting, the contact wheel group 330 enters the buffer section of the fixed rail 130, radially... As the thrust gradually disappears, the spring 340 pushes the contact wheel group 330 to move outward, causing the cutter 250 to slowly open and restore the initial gap. When the rotating ring 140 rotates to 360°, the connecting frame 310 returns to the initial position. The second magnet group 670 is attracted to the first magnet group 660 on the initial side again, pulling the rotating frame 620 to rotate. The extrusion seat 630 moves away from the blank, the elastic element 650 is stretched again, the rubber pad 640 is released from clamping, and the cut blank is transported by the subsequent conveying mechanism to the next section of blank, entering the next cutting cycle, realizing continuous batch production.

[0062] In this application, it should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. The term "multiple" refers to two or more, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0065] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0066] In this application, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cutting mechanism for a screw cold heading machine, characterized in that, include: Support base; A fixed rail is fixedly connected to the support base, and the inner wall of the fixed rail has an irregular circular outline structure. A rotating ring is fitted onto the outside of the fixed rail; Two cutting components are symmetrically arranged inside the rotating ring, and the two cutting components are capable of rotating around the circumference of the rotating ring. Each cutting component includes a cutter, and the two cutter blades face each other, forming a gap between them to accommodate the blank. A connector is used to connect the fixed rail and the support base; An installation plate is disposed inside the rotating ring, and the two cutting components are fixedly connected to the installation plate; Multiple balls are evenly distributed between the rotating ring and the fixed rail; Two extrusion components are connected to each of the cutting components. Each extrusion component slides along the irregular inner wall of the fixed rail, driving the distance between the two cutters to change in a regular manner. A drive assembly, disposed on the support base, is used to drive the rotating ring to rotate the two cutting assemblies around the fixed rail. The drive assembly includes: The gear ring is fixedly disposed on the outer circumference of the rotating ring; A fixing frame is mounted on the support base, and a bearing seat is provided on the top of the fixing frame; The gear is rotatably connected to the bearing seat of the fixed frame and meshes with the gear ring; The motor is mounted on the support base; A gearbox is disposed between the motor output shaft and the gear; A stabilizing component is disposed on the fixed rail near the feed side of the blank, for assisting in clamping the blank; The stabilizing component includes: The mounting bracket is fixedly connected to the connector. Two clamping assemblies are symmetrically arranged on both sides of the mounting bracket, each clamping assembly comprising: A rotating frame is mounted on the mounting frame and is rotatably connected to the mounting frame; The extrusion seat, fixedly connected to the rotating frame, has an arc-shaped structure; A rubber pad is disposed inside the compression seat; The elastic element is located on the side of the rotating frame away from the compression seat and is made of elastic rubber block.

2. The screw cold heading machine cutting mechanism according to claim 1, characterized in that, The irregular circular contour inner wall of the fixed rail includes: The inner wall of the maintenance section has an arc-shaped outline with a constant radius; The sheared section has a gradually changing arc-shaped inner wall profile with a gradually decreasing radius; The buffer section has an inner wall profile that smoothly transitions from the end of the shearing section to the beginning of the maintaining section, with the radius gradually increasing.

3. The cutting mechanism of the screw cold heading machine according to claim 1, characterized in that, Each of the cutting components includes: The mounting base is fixedly connected to the mounting plate; The guide post is telescopically mounted on the fixed base; A threaded sleeve is fixedly installed on the outside of the guide post; A blade holder is fixedly mounted at one end of the guide post away from the fixed base, and the cutter is fixed inside the blade holder; Two nuts are threadedly connected to the threaded sleeve.

4. The screw cold heading machine cutting mechanism according to claim 3, characterized in that, The extrusion assembly includes: A connecting frame is mounted on the guide post, and two threaded sleeves are disposed on both sides of the connecting frame; A connecting column is fixedly connected to the connecting frame and passes through the fixing base; A contact wheel assembly is disposed at the end of the connecting column away from the connecting frame, and the fixed rail is adapted to the contact wheel assembly; A spring is mounted on the connecting post and located between the fixed base and the contact wheel assembly.

5. The screw cold heading machine cutting mechanism according to claim 4, characterized in that, The stabilizing component also includes: The first magnet assembly is fixedly mounted on the rotating frame; The second magnet group is fixedly mounted on the connecting frame. Both the first magnet group and the second magnet group include positive magnets and negative magnets.

6. The cutting mechanism of the screw cold heading machine according to claim 1, characterized in that, It also includes a protective component, which includes: An upper protective cover is installed on top of the support base; The lower protective cover is located at the bottom of the support base, and both the upper and lower protective covers cover the outer side of the gear ring.

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