A composite tooth rolling plate and its tooth rolling process

Abstract

This invention discloses a composite tooth-rolling plate and its tooth-rolling process, relating to the field of tooth-rolling plate technology. It includes a fixed plate assembly and a movable plate assembly movably connected to one side of the fixed plate assembly. The fixed plate assembly includes a fixed light plate and a fixed tooth plate, and the movable plate assembly includes a movable light plate and a movable tooth plate. The light rod is rotated between the fixed light plate and the movable light plate, and then tooth-rolled between the fixed tooth plate and the movable tooth plate. It also includes a support assembly, each disposed on the opposite side of the fixed plate assembly and the movable plate assembly, comprising a detection element and a support element, both of which are in contact with the bottom chamfer of the light rod. When the detection element detects an increase in the downward pressure applied to the bottom chamfer of the light rod, the fixed light plate moves closer to the movable light plate, and the support element moves downward. Before tooth-rolling, the surface of the light rod is pre-rotated using the fixed light plate and the movable light plate, thereby ensuring that the light rod meets the standards before tooth-rolling and avoiding damage to the fixed tooth plate and the movable tooth plate due to surface roughness or protrusions.

Description

Technical Field

[0001] This invention relates to the field of tooth rolling plate technology, and in particular to a composite tooth rolling plate and its tooth rolling process. Background Technology

[0002] A thread rolling dies, also known as thread rolling plates, are core molds installed on thread rolling machines for cold extrusion forming of external threads. They are key tools in the production of standard fasteners, screws, and bolts. They are used in pairs, consisting of a fixed short plate and a movable long plate. Their surfaces are precisely machined with helical threads that match the target thread. The movable long plate reciprocates at high speed, clamping and rolling the billet with strong pressure to cause cold extrusion and plastic deformation. The metal billet undergoes plastic flow under pressure, and the threads are pressed out by the threads while the billet rotates. This method is suitable for high-strength, high-volume production.

[0003] Chinese patent application CN120532989A discloses a thread rolling plate for producing self-tapping and self-locking screws, including a main thread rolling plate and a secondary thread rolling plate. The main thread rolling plate and the secondary thread rolling plate are provided with working surfaces. The working surfaces are provided with a converging part and a shaping part. The shaping part is provided with high thread grooves, low thread grooves, upper square threads and lower square threads.

[0004] The above-mentioned technical solutions all have some problems in actual use. For example, the guide rod inevitably has surface defects or rough machining marks before thread rolling, which can cause the guide rod to scratch the fixed and movable die plates during thread rolling. When thread rolling is performed near the chamfer at the bottom of the guide rod, the inconsistent shape of the joint will lead to uneven force, and the threads near the chamfer at the bottom of the guide rod will have bulges and burrs. In addition, the guide rod will shrink in diameter and deform during thread rolling, which will affect the thread rolling quality. At the same time, some guide rods have significant defects, and even with turning, they cannot meet the thread rolling requirements. Forcing them to be thread rolled will reduce the service life of the movable and fixed die plates.

[0005] Therefore, it is necessary to invent a composite tooth-rolling board and its tooth-rolling process to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a composite tooth rolling plate and its tooth rolling process to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a composite tooth-rolling plate, comprising a fixed plate assembly and a movable plate assembly movably connected to one side of the fixed plate assembly; the fixed plate assembly includes a fixed smooth plate and a fixed tooth plate; the movable plate assembly includes a movable smooth plate and a movable tooth plate; a smooth rod performs tooth rolling between the fixed smooth plate and the movable smooth plate after being pressed between the fixed tooth plate and the movable tooth plate; and further comprising: The support components are all located on the opposite side of the fixed plate group and the movable plate group, including the detection component and the support component. They are all in contact with the bottom chamfer of the light rod. The fixed light plate moves from the initial position to the preset position closer to the end of the movable light plate. When the pressure value applied downward by the detection component to the bottom chamfer of the light rod increases, the detection component and the support component move downward.

[0008] Preferably, the fixing plate assembly further includes: The push rod, whose output end is fixedly installed on the outside of the fixed light plate, is used to drive the fixed light plate to move and adjust the distance between it and the movable light plate; The side of the fixed light plate is slidably connected to the side of the fixed tooth plate, and a recycling channel is provided between the fixed light plate and the fixed tooth plate.

[0009] Preferably, the movable light plate is fixedly connected to the movable tooth plate, and the tooth patterns of both the fixed tooth plate and the movable tooth plate gradually deepen from one side to the other.

[0010] Preferably, the support component further includes: The lifting device has its output end fixedly connected to the bottom of the detection component and the support component, and is used to control the up and down movement of the detection component and the support component.

[0011] Preferably, the detection components are all located on opposite sides of the fixed light plate and the movable light plate. One side of the detection component is in sliding contact with the inner side of the fixed light plate or the movable light plate, and the other side of both sets of detection components is in contact with the bottom chamfer of the light rod. A pressure sensor is provided above the detection component to detect the pressure value of the bottom chamfer of the light rod.

[0012] Preferably, the support members are all located on the opposite side of the fixed tooth plate and the movable tooth plate, one side of the support member is in sliding contact with the inner side of the fixed tooth plate or the movable tooth plate, and the other side of the two sets of support members is in contact with the bottom chamfer of the light rod.

[0013] A tooth-rolling process, wherein the tooth-rolling process utilizes a composite tooth-rolling plate, and the tooth-rolling process includes the following steps: S1. The light rod is fed to the fixed light plate and the movable light plate for pressing; S2. The guide rod reaches between the fixed tooth plate and the movable tooth plate to perform tooth cutting; S3. Screws formed by thread rolling or bare rods with defects are discharged and collected separately.

[0014] Preferably, S1 includes: S101, the movable light plate and the movable tooth plate move to the left, and the fixed light plate gradually moves from the initial position to the end closer to the movable light plate to the preset position. The detection component supports the bottom chamfer of the light rod and detects the pressure in real time. S102. When the fixed light plate has not reached the preset position, if the pressure value detected by the detection element increases, the detection element moves downward. S103. When the fixed light plate moves to the preset position, if the detection component detects that the pressure value has reached the preset pressure value, the fixed light plate stops moving forward. S104. When the fixed light plate has not moved to the preset position and the pressure value is detected to be increasing and moving downward to the set maximum distance value, the detection element at the bottom of the fixed light plate moves down and the detection element at the bottom of the movable light plate moves up. At the same time, the fixed light plate moves backward and opens the recycling channel, so that the light rod can be recycled through the recycling channel.

[0015] Preferably, S2 includes: S201, The movable toothed plate moves continuously, and the inner teeth of the movable toothed plate and the fixed toothed plate are pressed and shaped against the surface of the smooth rod. S202. Adjust the height of the support component to be the same as the height of the detection component, and make the support component fit against the chamfer at the bottom of the smooth rod to support the chamfer at the bottom of the smooth rod.

[0016] The technical effects and advantages of this invention are as follows: 1. In this invention, the surface of the tooth rod is pre-pressed using a fixed tooth plate and a movable tooth plate before tooth rolling, thereby ensuring that the tooth rod meets the standard before tooth rolling and avoiding damage to the fixed tooth plate and movable tooth plate caused by roughness or protrusion of the tooth rod surface.

[0017] 2. In this invention, the support member supports the chamfer at the bottom of the polished rod during the thread rolling process, so that the thread forming at the junction of the chamfer at the bottom of the polished rod and the thread is stable, effectively avoiding the generation of burrs and bulges, and improving the quality and processing consistency of the polished rod after the thread is formed.

[0018] 3. In this invention, the detection component detects and moves in real time, and the position of the support component is adaptively adjusted before the guide rod enters between the movable tooth plate and the fixed tooth plate, thereby ensuring that the force at the junction of the chamfer at the bottom of the guide rod and the thread is stable after thread rolling, resulting in a better thread effect.

[0019] 4. In this invention, when the detection component detects that the optical rod cannot reach the preset standard range, it is subjected to emergency recycling treatment to avoid damaging the threads of the movable and fixed tooth plates, thereby ensuring the accuracy of the formed screws and the service life of the movable and fixed tooth plates. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the tooth-rubbing machine body structure of the present invention; Figure 2 This is a schematic diagram of the fixed plate assembly and movable plate assembly structure of the present invention; Figure 3 This is a schematic diagram of the fixed plate assembly and movable plate assembly from another perspective of the present invention; Figure 4 This is a schematic diagram of the pressing process of the fixed plate assembly and the movable plate assembly of the present invention; Figure 5 This is a schematic diagram of the movable plate assembly structure of the present invention; Figure 6 This is a schematic diagram of the fixed plate assembly structure of the present invention; Figure 7 This is a top view schematic diagram of the support component of the present invention.

[0021] In the diagram: 1. Fixed plate assembly; 101. Fixed smooth plate; 102. Fixed tooth plate; 103. Push rod; 104. Recycling channel; 2. Movable plate assembly; 201. Movable smooth plate; 202. Movable tooth plate; 3. Support assembly; 301. Detection component; 302. Support component; 303. Lifting device; 4. Tooth rolling machine body; 401. Mounting base; 402. Drive device; 403. Guide rail; 404. Push plate; 405. Mounting block. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1 In the use of a composite thread rolling slab, the polished rod to be rolled inevitably has surface defects or rough machining marks before rolling, which can easily cause the polished rod to scratch the fixed thread rolling plate 102 and the movable thread rolling plate 202 during the rolling process. The damage is irreversible. The fixed thread rolling plate 102 and the movable thread rolling plate 202 have extremely high requirements for thread texture and are difficult to replace frequently, ultimately affecting production efficiency. Furthermore, the threads formed by rolling a defective polished rod are prone to cracks or chipping, affecting thread quality. Additionally, the polished rod is usually chamfered before rolling, but both the fixed thread rolling plate 102 and the movable thread rolling plate 202 have thread textures. Therefore, rolling is performed near the chamfer at the bottom of the polished rod. During thread rolling, errors or misalignments exist at the connection between the chamfer at the bottom of the guide rod and the threaded area, resulting in bulges and burrs on the threads near the chamfer. This makes it difficult to obtain high-quality screws, affecting product precision and surface quality. Furthermore, the guide rod will shrink and deform during the thread rolling process, further affecting the thread rolling quality. At the same time, the thread depth of the traditional fixed thread plate 102 and movable thread plate 202 is constant. This causes the guide rod to slip when it first contacts the fixed thread plate 102 and movable thread plate 202 due to the excessively wide thread. The fixed thread plate 102 and movable thread plate 202 cannot roll the thread of the guide rod effectively, resulting in poor thread quality.

[0024] This invention provides, for example Figures 1 to 7 The composite tooth rolling plate shown includes a fixed plate assembly 1 and a movable plate assembly 2 movably connected to one side of the fixed plate assembly 1. The fixed plate assembly 1 includes a fixed smooth plate 101 and a fixed tooth plate 102, and the side of the fixed smooth plate 101 is slidably connected to the side of the fixed tooth plate 102.

[0025] A recycling channel 104 is provided between the fixed light plate 101 and the fixed tooth plate 102. The initial position of the fixed light plate 101 is located behind the fixed tooth plate 102 on one side. That is, at the initial position, the distance between the fixed light plate 101 and the movable light plate 201 is greater than the distance between the fixed tooth plate 102 and the movable light plate 201. When the light rod rotates, it moves closer to the movable light plate 201 and applies pressure to the light rod. This can smooth out the roughness or protrusions on the surface of the light rod, thereby ensuring that the light rod meets the standard before tooth rolling.

[0026] The push rod 103, whose output end is fixedly installed on the outside of the fixed light plate 101, is used to drive the fixed light plate 101 to move and adjust the distance between it and the movable light plate 201. The push rod 103 pushes the fixed light plate 101 from the initial position to the preset position. At the same time, the movable light plate 201 moves to the left to rotate and press the light rod between the fixed light plate 101 and the movable light plate 201. The push rod 103 drives the fixed light plate 101 to move from the initial position to the preset position, so that the fixed light plate 101 gradually contacts and rotates with the light rod.

[0027] The movable plate assembly 2 includes a movable smooth plate 201 and a movable toothed plate 202. After the smooth rod is pressed between the fixed smooth plate 101 and the movable smooth plate 201, it is threaded between the fixed toothed plate 102 and the movable toothed plate 202. The movable smooth plate 201 and the movable toothed plate 202 are fixedly connected. The threads of the fixed toothed plate 102 and the movable toothed plate 202 gradually deepen from one side to the other. By continuously moving the movable toothed plate 202 to the left, the smooth rod between the movable toothed plate 202 and the fixed toothed plate 102 is threaded. The threads of the movable toothed plate 202 and the fixed toothed plate 102 forcefully compress the metal smooth rod. The smooth rod is clamped on one side and rotates on its own, so that the smooth rod is cold-pressed to form threads one circle at a time.

[0028] Support components 3, each located on the opposite side of the fixed plate group 1 and the movable plate group 2, include a detection component 301 and a support component 302. Both components are in contact with the bottom chamfer of the guide rod. The support components 302 are located at the bottom of the fixed tooth plate 102 and the movable tooth plate 202. One side of the support component 302 is in sliding contact with the inner side of the fixed tooth plate 102 or the movable tooth plate 202, and the other side of the two sets of support components 302 is in contact with the bottom chamfer of the guide rod. The support components 302 provide constant support to the chamfer at the bottom of the guide rod during the turning and thread rolling process, thereby improving the quality and processing consistency of the guide rod after forming the thread.

[0029] It also includes a tooth-rolling machine body 4, which includes a mounting base 401. The mounting base 401 is movably connected to the side wall of the fixed plate group 1. That is, one end of the push rod 103 is fixedly connected to the side wall of the mounting base 401. The top of the mounting base 401 is fixedly mounted with a drive device 402 and a guide rail 403. The output end of the drive device 402 is connected to a push plate 404 and a mounting block 405 respectively. The other end of the mounting block 405 is fixedly connected to the movable plate group 2. The drive device 402 drives the push plate 404 to move back and forth to push the light rod to feed. At the same time, the drive device 402 drives the mounting block 405 and the movable plate group 2 fixedly mounted on it to move. The guide rail 403 is inclined to facilitate the light rod to feed along the inside of the guide rail 403.

[0030] In summary, with Figure 1 Taking the direction as an example, when using this composite tooth-rolling plate, it is necessary to roll the teeth of the large-diameter and chamfered optical rod. The fixed plate group 1 and the movable plate group 2 are pre-installed on the mounting base 401 of the tooth-rolling machine body 4. The distance between the fixed plate group 1 and the movable plate group 2 is adjusted according to the diameter of the optical rod to be processed. Then, the drive device 402 in the tooth-rolling machine body 4 is started. The output end of the drive device 402 drives the movable plate group 2 to move back and forth in the left and right direction on the side of the fixed plate group 1 through the mounting block 405. The movable plate group 2 and the fixed plate group 1 are always parallel. At the same time, the drive device 402 drives the push plate 404 to move back and forth in the front and back direction, which is consistent with the activity cycle of the movable plate group 2. The optical rod reaches the position of the push plate 404 in the guide rail 403 and moves between the movable plate group 2 and the fixed plate group 1 under the push of the push plate 404. The push plate 404 pushes one optical rod at a time to move and feed.

[0031] Then the movable light plate 201 moves to the left, causing the fixed light plate 101 and the movable light plate 201 to move parallel to each other and gradually face each other. At this time, the fixed light plate 101 is in the initial position, that is, the front-to-back distance between the fixed light plate 101 and the movable light plate 201 is the largest. The detection element 301 slidably connected to the bottom of the fixed light plate 101 is in the preset position. The distance between the two detection elements 301 and the support element 302 is matched with the diameter of the chamfer at the bottom of the light rod. Therefore, the detection elements 301 and the support element 302 only move up and down and do not move back and forth with the fixed light plate 101. At the same time, the chamfer at the bottom of the light rod is in contact with the detection elements 301 at the bottom of the fixed light plate 101 and the movable light plate 201. The detection elements 301 support the chamfer at the bottom of the light rod and provide certain support to ensure uniform deformation when the chamfer at the bottom of the light rod is compressed.

[0032] Simultaneously, push rod 103 drives fixed light plate 101 to gradually move from its initial position toward the end closer to movable light plate 201, causing fixed light plate 101 to gradually contact light rod. If fixed light plate 101 contacts light rod before moving to the preset position, it indicates that light rod has surface roughness or protrusions. At this time, under the relative leftward movement of movable light plate 201 and fixed light plate 101, light rod rotates between fixed light plate 101 and movable light plate 201. The pressure of fixed light plate 101 and movable light plate 201 on light rod and smooths out the surface roughness or protrusions of light rod, thereby ensuring that light rod meets the standard before thread rolling, avoiding damage to fixed thread plate 102 and movable thread plate 202 caused by surface roughness or protrusions of light rod, and ensuring that light rod can form precise thread marks later, resulting in higher precision screws.

[0033] Afterwards, the movable tooth plate 201 and the movable tooth plate 202 continue to move to the left, so that the smoothed tooth rod reaches between the movable tooth plate 202 and the fixed tooth plate 102 for tooth rolling operation. That is, the movable tooth plate 202 continues to move to the left and rolls the tooth of the tooth rod. The tooth patterns of the movable tooth plate 202 and the fixed tooth plate 102 strongly compress the metal tooth rod. The tooth rod is clamped and rotates on one side. The compressed metal in the tooth rod flows to the tooth valley, so that the tooth marks gradually become full and form a thread.

[0034] The entire process involves no cutting or iron filings, relying solely on plastic deformation to form threads with higher strength. Since the threads of the fixed tooth plate 102 and the movable tooth plate 202 gradually deepen from one side of the fixed smooth plate 101 to the other, the smooth rod gradually rotates from the shallower thread area to the deeper thread area. Thus, after the smooth rod meshes with the shallow thread, it is gradually pressed into a qualified thread. The process of going from shallow to deep allows the smooth rod to better match the thread in the initial position, reducing slippage caused by excessively wide threads. At the same time, the gradual deepening results in higher thread precision, fewer burrs and damage, and a higher yield.

[0035] During the thread rolling process of the polished rod, the support member 302 at the bottom of the fixed polished plate 101 and the movable polished plate 201 is in contact with the chamfer at the bottom of the polished rod and supports the chamfer at the bottom of the polished rod at all times. This avoids defects at the junction of the chamfer at the bottom of the polished rod and the thread after thread rolling, effectively preventing the generation of burrs and bulges, improving the quality and processing consistency of the polished rod after forming the thread. In addition, the support member 302 supports and limits the bottom of the polished rod, preventing some of the compressed metal in the polished rod from deforming axially downward due to the diameter reduction when thread rolling between the fixed tooth plate 102 and the movable tooth plate 202, thus reducing the amount of flow to the tooth valley. This effectively ensures that the metal flows to the tooth valley to form the thread, improving the thread forming accuracy.

[0036] At the same time, the guide rod rolls over the entire effective thread area, and the threads on the surface of the guide rod are completely finished. Since the length of the movable tooth plate 202 is greater than that of the fixed tooth plate 102, after the guide rod moves to the leftmost end of the movable tooth plate 202, the fixed tooth plate 102 and the movable tooth plate 202 are misaligned, causing the rolled screw to be pushed out in the same direction. The formed screw slides down from the discharge position of the tooth rolling machine body 4 and is collected.

[0037] Example 2 Based on the above embodiments, the movable light plate 201 and the fixed light plate 101 cooperate to flatten the light rod. However, during the flattening process, the light rod itself deforms, causing the bottom chamfer of the light rod to deform to a certain extent. If the fixed detection piece 301 and support piece 302 are still used to support and limit the bottom chamfer of the light rod, it is difficult to achieve stable support and limit, resulting in bulging and burr problems in the threads near the bottom chamfer of the light rod. The original support piece 302 cannot achieve the required auxiliary thread rolling effect. At the same time, during the thread rolling process of the light rod, some light rods themselves have large defects. If the thread rolling operation is still performed according to the standard, not only will it be impossible to form qualified screws, but it may even damage the threads of the movable thread plate 202 and the fixed thread plate 102, affecting the thread accuracy of the screw formed by the light rod in the future.

[0038] To solve the above problems, a composite tooth-rolling slab further includes a lifting device 303, the output end of which is fixedly connected to the bottom of the detection element 301 and the support element 302. The lifting device 303 is used to control the up and down movement of the detection element 301 and the support element 302. The lifting device 303 drives the detection element 301 to move up and down, so that the pressure value detected by the detection element 301 is maintained within a certain range. Meanwhile, the inner side of the detection element 301 is always in contact with the bottom chamfer of the smooth rod. At the same time, the support element 302 moves to the same height as the current detection element 301 under the action of the lifting device 303 and remains stable. Thus, during the tooth-rolling process of the smooth rod, the support element 302 provides stable support for the bottom chamfer of the smooth rod.

[0039] The bottom of the lifting device 303 is fixedly installed on the bottom of the mounting block 405. The lifting device 303 drives the support 302 and the detection component 301 to move up and down. The lifting device 303 at the bottom of the movable light plate 201 drives the detection component 301 to move up and down but does not move with the left and right movement of the movable light plate 201.

[0040] The detection elements 301 are all located on the opposite side of the fixed light plate 101 and the movable light plate 201. One side of the detection element 301 slides in contact with the inner side of the fixed light plate 101 or the movable light plate 201, and the other side of both sets of detection elements 301 is in contact with the bottom chamfer of the light rod. When the light rod rotates between the fixed light plate 101 and the movable light plate 201, the detection element 301 detects the change in the bottom chamfer of the light rod, controls the distance the fixed light plate 101 moves and adjusts the height of the support 302. A pressure sensor is provided above the detection element 301 to detect the pressure value of the bottom chamfer of the light rod. The fixed light plate 101 moves from the initial position to the end closer to the movable light plate 201 to the preset position. When the detection element 301 detects that the downward pressure value applied to the bottom chamfer of the light rod has increased, the detection element 301 and the support 302 move downward.

[0041] In summary, during use, the guide rod is fed between the movable guide plate 201 and the fixed guide plate 101. At this time, the detection element 301 supports the bottom chamfer of the guide rod, and the pressure sensor above the detection element 301 detects the pressure in real time. When the fixed guide plate 101 moves closer to the movable guide plate 201 but has not reached the preset position, the fixed guide plate 101 applies pressure to the rough and protruding surfaces of the guide rod to make the surface of the guide rod flat. Under the pressure of the fixed guide plate 101, the guide rod itself deforms and undergoes uniform deformation under the support of the detection element 301. This deformation is within the preset standard range and does not affect the subsequent screw forming.

[0042] Meanwhile, the deformation of the guide rod inevitably causes the bottom chamfer of the guide rod to deform to a certain extent. As a result, the pressure sensor above the detection component 301 detects a change in pressure value, and then controls the lifting device 303 at the bottom of the detection component 301 to drive the detection component 301 to move up and down, so that the pressure value detected by the detection component 301 is maintained within a certain range. The inner side of the detection component 301 is always in contact with the bottom chamfer of the guide rod to ensure that the detection component 301 supports the bottom chamfer of the guide rod, so that the size of the screw formed later is within the preset standard range.

[0043] For example, when the pressure values ​​detected by the pressure sensor above the detection element 301 all increase, it indicates that the light rod has a protrusion and has deformed. The squeezing force exerted by the chamfer at the bottom of the light rod on the detection element 301 increases. Then, the lifting device 303 drives the detection element 301 to move downward. The supporting force exerted by the detection element 301 on the chamfer at the bottom of the light rod remains stable, further ensuring the supporting and pressure-reducing effect of the chamfer.

[0044] If the pressure value detected by one side of the detection element 301 increases to a certain value while the pressure value detected by the other side of the detection element 301 does not increase to that value, it indicates that the light rod deforms preferentially towards that side during the pressing process. In order to ensure the uniformity of the chamfer at the bottom of the light rod, neither of the two detection elements 301 moves. At this time, under the limiting action of the detection element 301, the light rod flows and deforms towards the detection element 301 on the side where the pressure value has not increased to that value, thereby cooperating with the continuous pressing of the light rod to achieve uniform deformation and ensure its pressing effect. Afterwards, when the pressure values ​​detected by both detection elements 301 increase to the same value, both detection elements 301 move downward to make way, and the light rod continues to deform downward during the pressing process.

[0045] When the fixed light plate 101 moves to the preset position, and the light rod has not yet reached the ends of the fixed tooth plate 102 and the movable tooth plate 202, an adjustment gap is left to prevent the light rod from directly performing thread rolling after the pressure is turned, which would reduce the subsequent thread rolling effect. When the detection component 301 detects that the pressure value has reached the preset pressure value, it means that the light rod has reached the appropriate diameter and can be thread rolled. The light rod continues to move to the end of the fixed light plate 101 and the movable light plate 201. At the same time, the support component 302 moves to the same height as the current detection component 301 under the action of the lifting device 303 and remains stable. Thus, during the subsequent thread rolling process of the light rod, the support component 302 provides stable support for the bottom chamfer of the light rod, ensuring that the force at the junction of the bottom chamfer and the thread is stable after thread rolling, resulting in a better thread effect, thereby avoiding the generation of burrs and bulges at the bottom chamfer of the light rod.

[0046] When the fixed light plate 101 and the movable light plate 201 apply pressure to the light rod, and the fixed light plate 101 has not reached the preset position, the detection element 301 detects that the pressure value is continuously increasing and moves downward to the preset maximum distance value. This indicates that the light rod itself is deformed under the pressure of the fixed light plate 101, that is, the diameter or protrusion of the light rod itself exceeds the preset value. As a result, the light rod after subsequent pressure flattening still cannot reach the preset standard range, and may even damage the teeth of the movable tooth plate 202 and the fixed tooth plate 102. At this time, the detection element 301 at the bottom of the fixed light plate 101 moves down quickly back to the minimum height value under the action of the lifting device 303, while the detection element 301 at the bottom of the movable light plate 201 moves up quickly to the maximum height value under the action of the lifting device 303. At the same time, the push rod 103 drives the fixed light plate 101 to move backward quickly to the maximum distance, and this maximum distance is greater than the initial position, thus opening the recycling channel 104.

[0047] The light rod is pushed upward by the detection element 301 at the bottom of the movable light plate 201, while the light rod is not subjected to the force of the detection element 301 at the bottom of the fixed light plate 101. Under the upward impact force of the detection element 301 at the bottom of the movable light plate 201, the light rod moves towards the fixed light plate 101. The fixed light plate 101 moves backward to make room for the light rod to enter the recycling channel 104. The light rod moves out behind the fixed tooth plate 102 along the recycling channel 104 and is collected and processed. Then the push rod 103 drives the fixed light plate 101 to reset. The detection element 301 is reset under the drive of the lifting device 303. If the diameter or protrusion of the light rod exceeds the preset value multiple times in a row, the tooth rolling machine 4 stops working and the staff performs maintenance and adjustment.

[0048] Example 3 A tooth-rolling process, which utilizes a composite tooth-rolling board, includes the following steps: S1. The guide rod is fed into the fixed guide plate 101 and the movable guide plate 201 for pressing. The guide rod is fed in the guide rail 403 of the thread rolling machine body 4. The guide rod reaches the position of the push plate 404 and is pushed laterally by the push plate 404 to reach the space between the movable plate group 2 and the fixed plate group 1. The fixed guide plate 101 and the movable guide plate 201 press and flatten the surface roughness or protrusion of the guide rod to ensure that the guide rod can form a precise thread in the future.

[0049] S101, the movable light plate 201 and the movable tooth plate 202 move to the left, and the fixed light plate 101 gradually moves from the initial position to the end close to the movable light plate 201 to the preset position. The detection element 301 supports the bottom chamfer of the light rod and detects the pressure in real time. The movable light plate 201 moves to the left under the drive mechanism. During this process, the detection element 301 located at the bottom of the light rod precisely fits into the chamfer part at the bottom of the light rod, forming a stable support for the light rod. At the same time, the pressure sensor above the detection element 301 collects the pressure data in real time.

[0050] S102. When the fixed light plate 101 moves but does not reach the preset position, if the pressure value detected by the detection element 301 increases, the detection element 301 moves downward. By adjusting the height of the detection element 301 and making real-time fine adjustments, the pressure value detected by the detection element 301 is maintained within the preset reasonable range, ensuring that the light rod is subjected to uniform force in the subsequent process. However, if the pressure value detected by the pressure sensor above one detection element 301 increases to a certain value while the pressure value detected by the pressure sensor above the other detection element 301 does not increase to that value, it indicates that the light rod has undergone uneven deformation on that side. If neither of the two detection elements 301 moves, the light rod will preferentially deform towards the side of the detection element 301 that has not increased to that value. When the pressure values ​​detected by the pressure sensors above the two detection elements 301 increase to the same value, the two detection elements 301 move downward synchronously to make way, thereby improving the uniformity and efficiency of the light rod deformation.

[0051] S103. When the fixed light plate 101 moves to the preset position, if the detection element 301 detects that the pressure value has reached the preset pressure value, the fixed light plate 101 stops moving forward, thereby completing the required pressure transfer process.

[0052] S104. When the fixed light plate 101 fails to move to the preset position and the pressure value is detected to continuously increase and move downward to the set maximum distance value, the detection element 301 at the bottom of the fixed light plate 101 moves downward and the detection element 301 at the bottom of the movable light plate 201 moves upward. At the same time, the fixed light plate 101 moves backward and opens the recycling channel 104, so that the light rod is recycled through the recycling channel 104. The pressure value detected by the detection element 301 determines that the light rod is seriously unqualified, triggering the abnormal handling procedure to recycle the unqualified light rod through the recycling channel 104 to prevent it from entering the subsequent process and damaging the equipment or affecting other workpieces.

[0053] S2. The guide rod reaches between the fixed tooth plate 102 and the movable tooth plate 202 for thread rolling. The guide rod is clamped and rotates on one side, so that the guide rod is cold-extruded and formed in circles. The compressed metal in the guide rod flows to the tooth valley, so that the tooth marks gradually become full and form threads.

[0054] S201, the movable toothed plate 202 continuously moves to rotate the guide rod. The inner threads of the movable toothed plate 202 and the fixed toothed plate 102 press against the surface of the guide rod. After multiple rotations, a thread is formed on the surface of the guide rod. The movable toothed plate 202 moves continuously to the left under the drive of the drive device 402, while the fixed toothed plate 102 remains stationary. When the fixed toothed plate 102 and the movable toothed plate 202 come into contact with the surface of the guide rod, the threads exert a uniform compressive force on the surface of the guide rod, causing plastic deformation of the metal on the surface of the guide rod. With multiple rotations and continuous compression of the guide rod, the metal gradually fills into the grooves of the threads, gradually forming a continuous and complete thread structure on the surface of the guide rod. The surface of the guide rod first contacts the fixed toothed plate 102. The shallow threads of the fixed tooth plate 102 and the movable tooth plate 202 engage, and then gradually rotate from the shallower thread area to the deeper thread area, gradually forming the predetermined thread. The threads of the fixed tooth plate 102 and the movable tooth plate 202 adopt a gradient design. During the thread rolling process, the guide rod first engages with the shallow thread. At this time, the extrusion pressure is small and the surface of the guide rod forms preliminary shallow thread marks. As the guide rod continues to rotate and the movable tooth plate 202 advances, the guide rod gradually moves from the shallower thread area to the deeper thread area. The extrusion pressure gradually increases, and the thread depth also gradually increases until the guide rod moves to the end of the fixed tooth plate 102, and the thread depth reaches the preset standard, forming the predetermined thread that meets the requirements.

[0055] S202. Adjust the height of the support 302 to be the same as the height of the detection part 301. The support 302 is in contact with the chamfer at the bottom of the guide rod and supports the chamfer at the bottom of the guide rod. At this time, the control system issues a command to adjust the height of the support 302 so that it rises quickly to the same height as the detection part 301, forming a stable support for the chamfer at the bottom of the guide rod, providing reliable support for the subsequent thread rolling process.

[0056] S3. Screws formed by thread rolling or defective smooth rods are discharged and collected. When the smooth rod surface forms a thread that meets the preset standard, the thread rolling is completed and it becomes a qualified finished screw. At this time, the movable thread plate 202 stops moving and returns to the initial position, while the fixed thread plate 102 remains stationary. The formed screws are discharged and transported to the finished product collection box. When the smooth rod does not meet the requirements, the smooth rod between the fixed smooth plate 101 and the movable smooth plate 201 is recycled along the recycling channel 104 to wait for subsequent processing. The thread rolling machine body 4 repeats the above process and continuously performs thread rolling operations on the smooth rods.

[0057] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite tooth-rolling slab, comprising a fixed plate assembly (1) and a movable plate assembly (2) movably connected to one side of the fixed plate assembly (1), wherein the fixed plate assembly (1) comprises a fixed smooth plate (101) and a fixed tooth plate (102), and the movable plate assembly (2) comprises a movable smooth plate (201) and a movable tooth plate (202), wherein the smooth rod is pressed between the fixed smooth plate (101) and the movable smooth plate (201) and then performs tooth rolling between the fixed tooth plate (102) and the movable tooth plate (202), characterized in that, Also includes: The support components (3) are all located on the opposite side of the fixed plate group (1) and the movable plate group (2), including the detection component (301) and the support component (302), which are both in contact with the bottom chamfer of the light rod. The fixed light plate (101) moves from the initial position to the end closer to the movable light plate (201) to the preset position. When the pressure value applied downward by the detection component (301) to the bottom chamfer of the light rod increases, the detection component (301) and the support component (302) move downward.

2. The composite tooth-rolling board according to claim 1, characterized in that, The fixed plate assembly (1) also includes: The push rod (103) has its output end fixedly installed on the outside of the fixed light plate (101) and is used to drive the fixed light plate (101) to move and adjust the distance between it and the movable light plate (201). The side of the fixed light plate (101) is slidably connected to the side of the fixed tooth plate (102), and a recycling channel (104) is provided between the fixed light plate (101) and the fixed tooth plate (102).

3. A composite tooth-rolling slab according to claim 1, characterized in that, The movable light plate (201) is fixedly connected to the movable tooth plate (202), and the tooth patterns of the fixed tooth plate (102) and the movable tooth plate (202) gradually deepen from one side to the other side.

4. A composite tooth-rolling board according to claim 1, characterized in that, The support component (3) also includes: The lifting device (303) has its output end fixedly connected to the bottom of the detection component (301) and the support component (302) to control the up and down movement of the detection component (301) and the support component (302).

5. A composite tooth-rolling slab according to claim 4, characterized in that, The detection components (301) are all located on the opposite side of the fixed light plate (101) and the movable light plate (201). One side of the detection component (301) slides in contact with the inner side of the fixed light plate (101) or the movable light plate (201), and the other side of both sets of detection components (301) is in contact with the bottom chamfer of the light rod. A pressure sensor is provided above the detection component (301) to detect the pressure value of the bottom chamfer of the light rod.

6. A composite tooth-rolling slab according to claim 5, characterized in that, The support members (302) are all located on the opposite side of the fixed tooth plate (102) and the movable tooth plate (202). One side of the support member (302) is in sliding contact with the inner side of the fixed tooth plate (102) or the movable tooth plate (202), and the other side of the two sets of support members (302) is in contact with the bottom chamfer of the light rod.

7. A tooth-rolling process, wherein the tooth-rolling process utilizes a composite tooth-rolling board as described in claim 2, characterized in that, The tooth-rubbing process includes the following steps: S1. The light rod is fed to the fixed light plate (101) and the movable light plate (201) for pressing; S2, the guide rod reaches between the fixed tooth plate (102) and the movable tooth plate (202) to perform tooth rolling; S3. Screws formed by thread rolling or bare rods with defects are discharged and collected separately.

8. The tooth-rolling process according to claim 7, characterized in that, S1 includes: S101, the movable light plate (201) and the movable tooth plate (202) move to the left, the fixed light plate (101) gradually moves from the initial position to the end close to the movable light plate (201) to the preset position, and the detection component (301) supports the bottom chamfer of the light rod and detects the pressure in real time; S102. When the fixed light plate (101) moves but does not reach the preset position, if the detection element (301) detects that the pressure value increases, the detection element (301) moves downward. S103. When the fixed light plate (101) moves to the preset position, if the detection element (301) detects that the pressure value reaches the preset pressure value, the fixed light plate (101) stops moving forward. S104 When the fixed light plate (101) has not moved to the preset position and the pressure value is detected to be increasing and moving downward to the set maximum distance value, the detection element (301) at the bottom of the fixed light plate (101) moves down and the detection element (301) at the bottom of the movable light plate (201) moves up. At the same time, the fixed light plate (101) moves backward and opens the recycling channel (104), so that the light rod is recycled through the recycling channel (104).

9. The tooth-rolling process according to claim 7, characterized in that, S2 includes: S201, the movable tooth plate (202) moves continuously, and the inner teeth of the movable tooth plate (202) and the fixed tooth plate (102) are extruded and formed on the surface of the smooth rod; S202. Adjust the height of the support (302) to be the same as the height of the detection part (301). The support (302) is attached to the chamfer at the bottom of the light rod and supports the chamfer at the bottom of the light rod.

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