Arch wire reducing process method and device thereof

Abstract

The invention discloses an arch wire diameter reducing process method and an arch wire diameter reducing device using the process method. The arch wire diameter reducing process method comprises a finished arch wire taking step, a feeding step, a diameter reducing treatment step and a discharging step. The arch wire diameter reducing device comprises a stamping die, a pressure applying mechanism and a power part. Compared with a conventional local electrolysis process which can only perform uniform size reduction on four side surfaces of the arch wire, the method has the advantages that size change values on different surfaces of the arch wire can be different, meanwhile, the arch wire is plastically deformed through high pressure to obtain the diameter-reduced arch wire, and compared with an electrolysis process in which the size reduction value is difficult to accurately control, the size reduction value can be accurately controlled. The size control precision is higher. In addition, diameter reducing treatment can be carried out on batch arch wires at a time, operation is easy, the treatment efficiency is remarkably improved, meanwhile, the material cost is reduced, and the use cost is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field of orthodontics, and particularly to a wire diameter reduction process method and a wire diameter reduction device using such a wire diameter reduction process method. Background Art

[0002] Reduced-diameter arch wires (referring to the part of the arch wire in the posterior tooth segment having a smaller size than that in the anterior tooth segment) are widely used in the orthodontic process. Taking a stainless steel square arch wire as an example, in the stage of closing the space in extraction cases, stronger control force is required in the anterior tooth segment than in the posterior tooth segment. If the size of the anterior tooth segment of the arch wire is made larger, it is beneficial to reduce the clearance angle between the anterior tooth segment of the arch wire and the bracket slot. In this way, during the retraction stage, the stainless steel square wire can effectively control the anterior tooth torque and achieve the effect of root control and retraction. At the same time, during the retraction of the anterior teeth, the arch wire in the posterior tooth segment and the slot will be in a relatively sliding state. At this time, if the size of the arch wire in the posterior tooth segment is made smaller, the sliding friction between the posterior tooth segment of the arch wire and the bracket slot can be reduced, thereby improving the orthodontic efficiency and ensuring the orthodontic effect. Therefore, the reduced-diameter arch wire is beneficial to simultaneously meet the orthodontic requirements of both the anterior tooth segment and the posterior tooth segment.

[0003] In the preparation stage of the reduced-diameter arch wire, it is necessary to first obtain a finished arch wire and then perform a diameter reduction treatment on it. Taking the stainless steel square arch wire as an example again, since the finished square arch wire is usually obtained by the wire drawing process, the radial cross-sectional dimension of the finished arch wire is uniform and unchanged, that is, the cross-sectional dimension of a wire in the anterior tooth segment and the posterior tooth segment is the same. Currently, the existing diameter reduction process is realized by the electrolysis process. After obtaining the above-mentioned finished arch wire, the finished arch wire is immersed in the electrolyte solution to achieve the effect of thinning the thickness and reducing the size by ionizing the surface layer of the arch wire. However, this electrolysis process can only uniformly reduce the four sides of the square arch wire and cannot separately reduce the sizes of two of its sides. When the finished arch wire is a square cross-section arch wire, the electrolysis process cannot produce a reduced-diameter arch wire with a rectangular cross-section. In order to exert a more precise control effect on the dentition, it is often desired that the cross-section of the obtained reduced-diameter arch wire is rectangular. For example, in some specific extraction and retraction cases, the cross-sectional dimension of the anterior tooth segment is 0.017*0.025 inches, and the cross-sectional dimension of the posterior tooth segment is 0.017*0.024 or 0.017*0.022 inches. To overcome such defects, only local electrolysis can be performed on the finished product process. However, the processing efficiency of this process is low, the accuracy is difficult to control, and the diameter reduction effect is uneven, and it cannot be mass-produced. In addition, due to the preparation, storage, warehousing, etc. of chemical media such as electrolytes, the comprehensive cost of this electrolytic diameter reduction process is also relatively high. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, one of the purposes of the present invention is to provide a method for reducing the diameter of an arch wire, and the second purpose is to provide an arch wire reducing device using the method for reducing the diameter of an arch wire, which can solve the problems of low production efficiency, low control accuracy, uneven diameter reduction effect, inability to mass produce, and high cost in the current production of reduced diameter arch wires using the electrolytic process.

[0005] The present invention is achieved by adopting the following technical solutions:

[0006] A method for reducing the diameter of an archwire comprises: S1, a step of obtaining a finished archwire: obtaining a finished square archwire to be reduced in diameter; S2, a loading step: placing the to-be-reduced section of the finished square archwire in the center of a stamping die cavity, wherein the height of the stamping die cavity is less than the height of the finished square archwire; the width of the stamping die cavity is greater than the width of the finished square archwire and is not less than the width of the archwire after the diameter is reduced; S3, a step of reducing the diameter: controlling a pressure mechanism to move toward the stamping die cavity, and continuously applying pressure to the finished square archwire in the stamping die cavity, so that the finished square archwire is plastically deformed in the stamping die cavity, so that the width of the archwire increases and the height decreases, until the height of the archwire is consistent with the height of the stamping die cavity; S4, a step of unloading: controlling the pressure mechanism to move away from the stamping die cavity, so that the reduced-diameter archwire is exposed, and the reduced-diameter archwire is obtained.

[0007] A device for reducing the diameter of an archwire adopts the method for reducing the diameter of an archwire, comprising: a stamping die, wherein a stamping die cavity in the shape of a groove is provided in the stamping die, an opening is provided at the top of the stamping die cavity, and the height of the stamping die cavity is less than the height of the finished square archwire; the width of the stamping die cavity is greater than the width of the finished square archwire and is not less than the width of the archwire after the diameter is reduced; a pressing mechanism, movably arranged above the stamping die cavity, having a stamping surface at the bottom thereof, the stamping surface being used to tightly cover the top opening of the stamping die cavity; and a power part, which is transmission-connected to the pressing mechanism and is used to control the pressing mechanism to move toward or away from the stamping die cavity.

[0008] Furthermore, a concave hollow groove is provided at the bottom of the pressure-applying mechanism, and the stamping surface is formed on both radial sides of the hollow groove; when the pressure-applying mechanism is pressed against the stamping die, the hollow groove is located directly above the anterior segment of the arch wire, and there is no contact between the hollow groove and the anterior segment of the arch wire and a gap exists; at the same time, the stamping surface is pressed against the posterior segment of the arch wire and pressurizes the posterior segment of the arch wire into the stamping die cavity.

[0009] Furthermore, a plurality of stamping cavities with different cross-sectional dimensions are formed on the stamping die, and the plurality of stamping cavities are arranged at intervals; correspondingly, a plurality of hollow grooves are formed at the bottom of the pressing mechanism to correspond to the front tooth segments of different stamping cavities, and the different hollow grooves are in through connection or arranged at intervals.

[0010] Furthermore, the wire diameter reducing device for arch wire further includes two guiding columns. The stamping die is fixedly connected to the lower ends of the guiding columns, and the pressing mechanism is slidably connected to the guiding columns to approach or move away from the stamping die.

[0011] Furthermore, the wire diameter reducing device for arch wire further includes a linear transmission mechanism; the linear transmission mechanism includes a lead screw and a nut rotatably connected to the lead screw; the pressing mechanism is fixed to the nut; the power part is a rotating handle, and the rotating handle is fixed to the top end of the lead screw.

[0012] Furthermore, the wire diameter reducing device for arch wire further includes a fixed seat, and the fixed seat is fixedly connected to the top ends of the two guiding columns; a through hole for the lead screw to pass through is formed on the fixed seat.

[0013] Furthermore, corresponding size scale values are respectively engraved on the side parts of each stamping cavity.

[0014] The wire diameter reducing device for arch wire according to claim 4, wherein the lengths of the hollow grooves are different and are used to correspond to arch wires with different front tooth segment lengths.

[0015] Compared with the prior art, the beneficial effects that the present invention can achieve are as follows:

[0016] According to the cross-sectional dimension of the arch wire after wire diameter reduction, the cross-sectional dimension of the stamping cavity is designed. The finished square arch wire to be subjected to wire diameter reduction treatment is placed into the stamping cavity. The pressing mechanism is controlled by the power part to move towards the side close to the stamping cavity. The pressing mechanism continuously applies pressure to the finished square arch wire, causing the arch wire to be squeezed and undergo plastic deformation, so that the width of the arch wire increases and the height decreases until the height of the arch wire is consistent with the height of the stamping cavity. By designing the stamping cavity with a specific cross-sectional dimension, a reduced-diameter arch wire with a specific rectangular cross-section can be manufactured.

[0017] This wire diameter reduction process for arch wire has the following advantages:

[0018] (1) By pre-designing the shape and dimension of the stamping cavity, reduced-diameter arch wires with any cross-sectional shape and dimension can be obtained. Compared with the prior electrolysis process that can only uniformly reduce the dimensions of the four surfaces of the arch wire, the present invention can make the dimension change values on different surfaces of the arch wire different, thus having a more flexible preparation effect.

[0019] (2) Plastic deformation of the arch wire is achieved through high pressure, and the reduction amount of the arch wire can be controlled by controlling the stamping stroke. Compared with the electrolysis process in which it is difficult to accurately control the size reduction value, the size control accuracy of the present invention is higher.

[0020] (3) By opening a plurality of stamping die cavities, the reduction process of a batch of arch wires can be carried out at one time, and the operation is simple, significantly improving the processing efficiency.

[0021] (4) The surface layer of the arch wire is not cut, and the overall volume of the arch wire remains unchanged. Therefore, the material itself is not wasted, reducing the material cost of the arch wire.

[0022] (5) There is no need to equip, store, and process the electrolyte, and the device can be reused, greatly reducing the usage cost. Description of the Drawings

[0023] Figure 1 The figure shows a three-dimensional view of the arch wire reduction device;

[0024] Figure 2 The figure shows a front view of the arch wire reduction device;

[0025] Figure 3 The figure shows a side view of the arch wire reduction device;

[0026] Figure 4 The figure shows a three-dimensional view of the arch wire reduction device from another perspective;

[0027] Figure 5 The figure shows a schematic structural diagram of the stamping die;

[0028] Figure 6 The figure shows a schematic structural diagram of the pressure application mechanism;

[0029] Figure 7 The figure shows a schematic diagram of the state where the finished square arch wire is placed in the stamping die cavity;

[0030] Figure 8 The figure shows a flow chart of the arch wire reduction process method.

[0031] In the figure: 100, finished square arch wire; 10, stamping die; 11, stamping die cavity; 20, pressure application mechanism; 21, stamping surface; 22, hollow groove; 30, guiding column; 40, lead screw; 50, nut; 60, turning handle; 70, fixed seat. Detailed Embodiments

[0032] Next, in combination with the drawings and specific embodiments, the present invention will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0035] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The present invention discloses a method for reducing the diameter of an arch wire and an arch wire diameter reduction device using this process method. To facilitate the understanding of the present invention, the meaning of arch wire diameter reduction is briefly described first: During orthodontic treatment, for some specific cases, such as in the stage of closing extraction spaces, the anterior tooth segment requires stronger control force and the posterior tooth segment requires smaller sliding friction. Therefore, the anterior tooth segment of the arch wire needs to be made thicker than the posterior tooth segment. This requires obtaining a thicker arch wire first and reducing the diameter of the posterior tooth segment of the arch wire so that the anterior tooth segment of the arch wire maintains its original larger size while the posterior tooth segment has a smaller size. For example, in some specific cases, the cross-sectional size of the anterior tooth segment of the arch wire is 0.017*0.025 inches, and the cross-sectional size of the posterior tooth segment is 0.017*0.024 or 0.017*0.022 inches. The anterior tooth segment of the arch wire refers to the part of the arch wire in the anterior tooth area, and the posterior tooth segment refers to the part of the arch wire in the posterior tooth area. The anterior tooth segment and the posterior tooth segment belong to different areas on the same arch wire.

[0037] Refer to Figure 8 , this method for reducing the diameter of an arch wire includes the following steps:

[0038] S1. Steps of obtaining the finished arch wire: Obtain the finished square arch wire to be reduced in diameter. It should be noted that the finished arch wire refers to the arch wire before the diameter reduction process, which is obtained through processes such as wire drawing. The outer diameter of the finished arch wire is uniform, that is, the cross-sectional dimensions in the radial direction are fixed and unchanged.

[0039] S2. Feeding step: Place the section to be reduced in diameter (usually the posterior tooth section) of the above-mentioned finished square arch wire in the stamping die cavity of the diameter reduction processing device, and center it at the central position in the stamping die cavity to make the subsequent stress uniform. The height (i.e., depth) of the stamping die cavity is less than the height of the finished square arch wire, that is, the upper end of the finished square arch wire protrudes outside the stamping die cavity; the width of the stamping die cavity is greater than the width of the finished square arch wire and is not less than the width of the arch wire after diameter reduction. For example, in the arch wire design stage, the cross-sectional dimensions (height * width) of the posterior tooth section after diameter reduction are 0.017 * 0.024 inches, then the height dimension of the stamping die cavity is also 0.017 inches, and the width is not less than 0.024 inches. Generally speaking, the width of the stamping die cavity should be significantly greater than the width of the arch wire after diameter reduction, so that the opening is relatively large, so that the arch wire is not easily tightly attached to the inner wall of the stamping die cavity after diameter reduction, and it is easy to take out the arch wire from the stamping die cavity during blanking; and it is also easy to put the arch wire into the stamping die cavity during the feeding stage.

[0040] S3. Diameter reduction processing step: Control the pressing mechanism of the diameter reduction processing device to move towards the stamping die cavity, and continuously apply an extrusion force to the finished square arch wire in the stamping die cavity, so that the finished square arch wire undergoes plastic deformation and is simultaneously limited by the stamping die cavity, causing the width of the arch wire to increase and the height to decrease until the height of the arch wire is the same as the height of the stamping die cavity.

[0041] S4. Blanking step: Control the pressing mechanism of the diameter reduction processing device to move away from the stamping die cavity, so that the arch wire after diameter reduction is exposed, and obtain the diameter-reduced arch wire.

[0042] Correspondingly, the present invention also provides an arch wire diameter reduction device that can adopt the above-mentioned diameter reduction processing process method. Refer to Figures 1 - 7 , which includes: a stamping die 10, a pressing mechanism 20, and a power part. Among them, a stamping die cavity 11 in the shape of a groove is opened on the stamping die 10. An opening is provided at the top of the stamping die cavity 11 for the finished square arch wire 100 to be placed. The height of the stamping die cavity 11 is less than the height of the finished square arch wire 100; the width of the stamping die cavity 11 is greater than the width of the finished square arch wire 100 and is not less than the width of the arch wire after diameter reduction. The pressing mechanism 20 is movably arranged above the stamping die cavity 11, and its bottom has a pressing surface 21. The pressing surface 21 is used to tightly cover the opening at the top of the stamping die cavity 11. Therefore, when the finished square arch wire 100 is placed in the stamping die cavity 11 and the top of the arch wire protrudes outside the stamping die cavity 11, the pressing surface 21 can completely squeeze the finished square arch wire 100 into the stamping die cavity 11, as shown inFigure 7 The power part is connected to the pressure mechanism 20 for controlling the pressure mechanism 20 to move toward or away from the stamping cavity 11; the power part can be realized by manpower or by a driving source such as a motor or a cylinder.

[0043] The cross-sectional dimensions of the stamping die cavity 11 are designed according to the cross-sectional dimensions of the arch wire after the diameter reduction, and the finished square arch wire 100 to be reduced is placed in the stamping die cavity 11. The pressure mechanism 20 is controlled by the power part to move toward the side close to the stamping die cavity 11. The pressure mechanism 20 continuously applies pressure to the finished square arch wire 100, so that the finished square arch wire 100 is squeezed and plastically deformed, so that the width of the arch wire increases and the height decreases, until the height of the arch wire is consistent with the height of the stamping die cavity, and finally a reduced diameter arch wire is obtained. In the extrusion process, by designing a stamping die cavity 11 with a specific cross-sectional dimension, a reduced diameter arch wire with a rectangular cross section of a specific dimension can be obtained.

[0044] This wire reduction process has the following advantages:

[0045] (1) By pre-designing the shape and size of the stamping die cavity 11, a reduced-diameter archwire with any cross-sectional shape and size can be obtained. Compared with the previous electrolytic process that can only uniformly reduce the size of the four sides of the archwire, the present invention can make the size change values on different sides of the archwire different, thereby having a more flexible preparation effect.

[0046] (2) The archwire is plastically deformed by high pressure, and the amount of diameter reduction of the archwire can be controlled by controlling the punching stroke. Compared with the electrolytic process in which it is difficult to accurately control the size reduction value, the size control accuracy of the present invention is higher.

[0047] (3) By providing a plurality of stamping die cavities 11, a batch of arch wires can be reduced in diameter at one time, and the operation is simple, which significantly improves the processing efficiency.

[0048] (4) The surface of the archwire is not cut, and the overall volume of the archwire remains unchanged, so there is no waste of material itself, reducing the cost of the archwire material.

[0049] (5) There is no need to prepare, store or process electrolyte; the device can be reused, greatly reducing the cost of use.

[0050] Since the cross-sectional dimensions of the finished square arch wire 100 along the radial direction are consistent, the front tooth segment often does not need to be reduced in diameter, but only the posterior tooth segments on both sides need to be reduced in diameter. Therefore, the conventional and easy-to-think-of method is to perform a diameter reduction treatment on the posterior tooth segments on the left and right sides of the arch wire respectively, that is, the same arch wire needs to be reduced twice, so that the posterior tooth segments on both sides can be reduced in diameter respectively; the processing efficiency of this process method is relatively low. Preferably, refer toFigure 6 and Figure 4 In the present invention, a hollow groove 22 is formed at the bottom of the pressing mechanism 20, which is correspondingly located above the anterior tooth segment of the arch wire. Since the hollow groove 22 is concave, two sides in the radial direction of the hollow groove 22 form the above-mentioned pressing surfaces 21. Specifically, when the pressing mechanism 20 is pressed onto the stamping die 10, the hollow groove 22 is located directly above the anterior tooth segment of the arch wire, and there is a certain gap (or just surface contact without mutual force) between the hollow groove 22 and the anterior tooth segment of the arch wire. At the same time, the pressing surface 21 presses on the posterior tooth segment of the arch wire and applies a force to the posterior tooth segment of the arch wire, so that the posterior tooth segment of the arch wire is extruded into the stamping die cavity 11. Through the specific structural cooperation among the hollow groove 22, the pressing surface 21 and the stamping die cavity 11, the pressing mechanism 20 only needs to make one downward movement to reduce the diameter of the posterior tooth segments on both sides of the same arch wire, while the anterior tooth segment will not be squeezed or affected and maintains the original outer diameter size. This processing method greatly improves the processing efficiency. Moreover, since the length and position of the hollow groove 22 are determined, the compressed lengths of the posterior tooth segments on both sides of the arch wire are also determined, which is equivalent to playing an accurate positioning role and making the diameter reduction effect stable.

[0051] In order to make the device have higher compatibility and batch processing ability, preferably, referring to Figure 5 and Figure 1 multiple stamping die cavities 11 with different cross-sectional dimensions are formed on the stamping die 10 to match different diameter reduction size specifications. The arch wire can be placed into the stamping die cavity 11 with the corresponding size according to the specific diameter reduction size required by the arch wire, and multiple pairs of arch wires can be processed at one time.

[0052] In addition, during a complete orthodontic treatment cycle, the patient needs to use multiple pairs of arch wires successively. In the present invention, the multiple stamping die cavities 11 are arranged at intervals. Correspondingly, referring to Figure 4 multiple hollow grooves 22 are formed at the bottom of the pressing mechanism 20 to correspond to the respective stamping die cavities 11, and the different hollow grooves 22 are in through connection or spaced arrangement. The lengths of the respective hollow grooves 22 are different to correspond to different lengths of the anterior tooth segments. In this way, the lengths of the anterior tooth segments of multiple pairs of arch wires pressed in batches are different. Thus, arch wires with reduced diameter can be mass-produced in advance, and arch wires with different lengths of anterior tooth segments can be pre-set. During actual use, the arch wires can be selected according to the requirements of the case for the length of the anterior tooth segment.

[0053] Preferably, the device further includes two guiding columns 30 to guide the movement of the pressing mechanism 20. The stamping die 10 is fixedly connected to the lower ends of the guiding columns 30, and the pressing mechanism 20 is slidably inserted through the guiding columns 30 and thus moves in a direction close to or away from the stamping die 10.

[0054] Preferably, the device further includes a linear drive mechanism for converting the power input of the power part into the linear motion of the pressing mechanism 20. In one embodiment, the linear drive mechanism includes a lead screw 40 and a nut 50 rotatably connected to the lead screw 40, and the pressing mechanism 20 is fixed to the nut 50; the power part is a rotating handle 60, and the rotating handle 60 is fixed to the top of the lead screw 40. By manually rotating the rotating handle 60 by an operator, the pressing mechanism 20 on the nut 50 can be driven to move linearly up and down along the lead screw 40, so that the pressing mechanism 20 approaches or moves away from the stamping die 10. Of course, the linear drive mechanism can also use other known linear mechanisms such as a slide rail-slider mechanism, a crank-link mechanism, a gear-rack mechanism, a worm-worm gear mechanism, etc.

[0055] Furthermore, the device further includes a fixed seat 70, and the fixed seat 70 is fixedly connected to the tops of the two guiding columns 30. A through hole for the lead screw 40 to pass through is also provided on the fixed seat 70.

[0056] To facilitate the operator to identify the specifications and dimensions of different stamping cavities 11, preferably, refer to Figure 5 , corresponding dimensional scale values are engraved on the sides of each stamping cavity 11. Correspondingly, refer to Figure 6 , for each hollow groove 22, corresponding scale values can also be engraved respectively.

[0057] The working principle of the device is as follows: When batch processing arch wires, obtain multiple finished square arch wires 100, and place the finished square arch wires 100 into different specifications of stamping cavities 11 according to specific reduction requirements; rotate the operating handle, so that the nut 50 drives the pressing mechanism 20 to move along the lead screw 40, and the pressing mechanism 20 fits onto the stamping die 10, and the pressing surface 21 extrudes the posterior tooth segment of the arch wire into the stamping cavity 11, so that the posterior tooth segment is reduced in diameter, while the anterior tooth segment is not affected. After pressing is completed, rotate the operating handle in the reverse direction to raise the pressing device and separate it from the stamping die 10, so that each reduced-diameter arch wire can be taken out.

[0058] It should be noted that this device is only one form of device for implementing this process method and is not the only hardware that can implement this process method; in fact, this process can also be implemented using other motion mechanisms or power sources, as long as it can achieve extruding the arch wire into a mold cavity of suitable specifications. Those using other pressing devices or pressing sources to achieve the reduction of the diameter of the arch wire should also be within the protection scope of this process method.

[0059] The above embodiments are only preferred embodiments of the present invention, and the scope of protection of the present invention cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. A process method for reducing the diameter of archwires, characterized in that, include: S1. Step of obtaining finished arch wire: obtain the finished square arch wire to be reduced in diameter. S2, a loading step: placing the section of the finished square arch wire to be reduced in diameter into the center of the stamping die cavity, wherein the height of the stamping die cavity is less than the height of the finished square arch wire; the width of the stamping die cavity is greater than the width of the finished square arch wire and is not less than the width of the arch wire after the diameter is reduced; S3, diameter reduction processing step: controlling the pressure mechanism to move toward the stamping die cavity, and continuously applying pressure to the finished square arch wire in the stamping die cavity, so that the finished square arch wire is plastically deformed in the stamping die cavity, so that the width of the arch wire increases and the height decreases, until the height of the arch wire is consistent with the height of the stamping die cavity; S4, blanking step: controlling the pressure mechanism to move away from the stamping die cavity to expose the reduced-diameter arch wire, and obtaining the reduced-diameter arch wire.

2. An arch wire diameter reduction device, adopting the arch wire diameter reduction process method as described in claim 1, characterized in that, include: A stamping die, wherein a stamping die cavity in the shape of a groove is provided in the stamping die, an opening is provided at the top of the stamping die cavity, a height of the stamping die cavity is less than a height of the finished square arch wire; a width of the stamping die cavity is greater than a width of the finished square arch wire, and is not less than a width of the arch wire after the diameter is reduced; A pressure mechanism, movably disposed above the stamping die cavity, having a stamping surface at its bottom, the stamping surface being used to tightly cover the top opening of the stamping die cavity; The power part is connected to the pressure mechanism in a transmission manner and is used to control the pressure mechanism to move toward or away from the stamping die cavity.

3. The wire diameter reducing device according to claim 2, wherein, The bottom of the pressure mechanism is provided with a concave hollow groove, and radial sides of the hollow groove form the stamping surface; When the pressure mechanism is pressed against the stamping die, the hollow groove is located directly above the anterior segment of the arch wire, and there is no contact and a gap between the hollow groove and the anterior segment of the arch wire; at the same time, the stamping surface is pressed against the posterior segment of the arch wire and pressurizes the posterior segment of the arch wire into the stamping die cavity.

4. The wire diameter reducing device according to claim 3, wherein The stamping die is provided with a plurality of stamping cavities with different cross-sectional sizes, and the plurality of stamping cavities are arranged in an intermittent manner; correspondingly, the bottom of the pressure-applying mechanism is provided with a plurality of hollow grooves corresponding to the front tooth sections of different stamping cavities, and the different hollow grooves are connected in a through manner or arranged in an intermittent manner.

5. The wire diameter reducing device according to claim 2, characterized in that, The archwire diameter reducing device also includes two guide columns, the stamping die is fixedly connected to the lower ends of the guide columns, and the pressure mechanism is slidably connected to the guide columns to approach or move away from the stamping die.

6. The wire diameter reducing device according to claim 5, characterized in that, The archwire diameter reducing device also includes a linear transmission mechanism; the linear transmission mechanism includes a lead screw and a nut rollingly connected to the lead screw; the pressure mechanism is fixed on the nut; the power part is a rotating handle, and the rotating handle is fixed to the top of the lead screw.

7. The wire diameter reducing device according to claim 6, wherein, The archwire diameter reducing device also includes a fixing seat, which is fixedly connected to the top ends of the two guide columns; a through hole is formed on the fixing seat for the lead screw to pass through.

8. The wire diameter reducing device according to claim 4, wherein, The side of each of the stamping cavities is respectively engraved with corresponding size scale values.

9. The wire diameter reducing device according to claim 4, characterized in that, The lengths of the hollow grooves are different and are used to correspond to archwires with different lengths of front tooth segments.

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