Shape memory alloy arch wire positive distortion diameter changing device and arch wire diameter changing method

Abstract

The invention discloses a shape memory alloy arch wire positive distortion diameter-changing device which comprises a wire supply assembly, a heat treatment assembly, a diameter-changing assembly and a wire drawing assembly, the wire supply assembly is used for supplying an arch wire, the heat treatment assembly is used for heating the arch wire, the diameter-changing assembly is used for changing the diameter of the arch wire, and the wire drawing assembly is used for drawing the arch wire. The arch wire sequentially passes through the wire supply assembly, the heat treatment assembly, the reducing assembly and the wire drawing assembly. The invention also aims to provide an arch wire reducing method. The arch wire is mounted on the wire supply assembly; a corresponding arch wire grinding tool is selected, and the corresponding arch wire grinding tool is installed; one end of the arch wire is pulled, the arch wire penetrates through the heat treatment assembly, the arch wire grinding tool and the reducing assembly, and the other end of the arch wire is fixed to the wire drawing assembly; starting a heat treatment assembly for preheating; and the wire drawing assembly is started to draw the arch wire, and the wire drawing assembly rotates at a constant speed to complete diameter changing. According to the device and the method, the labor intensity is reduced, the working efficiency is improved, the machining precision is high, and the arch wire diameter change is uniform.

Description

Technical Field

[0001] The present invention relates to the technical field of archwire diameter reduction, and in particular to a shape memory alloy archwire diameter reduction device for orthodontic treatment and an archwire diameter reduction method. Background Art

[0002] Archwire materials include titanium-molybdenum alloy, stainless steel, etc., or shape memory alloys such as nickel-titanium memory alloy, copper-titanium-nickel memory alloy, etc. The existing archwire drawing and forming machinery has low working efficiency, requires manual auxiliary drawing, has many processes, low production efficiency, poor heat treatment effect during simultaneous operation, uneven archwire diameter change, and easy winding and damage to the archwire raw materials during the diameter change process. It is easy to be processed into deformities, especially shape memory alloy archwires have poor effect when changing diameters. Therefore, a new technical solution is urgently needed to solve at least one of the above technical problems. Summary of the invention

[0003] In view of the above shortcomings, one object of the present invention is to provide a shape memory alloy archwire orthodontic diameter reduction device to reduce labor intensity and improve work efficiency. Another object of the present invention is to provide an archwire diameter reduction method to improve the physical properties of the archwire after heat treatment, with high processing accuracy and uniform archwire diameter reduction.

[0004] In order to achieve the above technical objectives and meet the above technical requirements, the technical solution adopted by the present invention is: A shape memory alloy archwire orthodontic diameter reducing device, characterized in that it comprises: A wire supply assembly, used for providing arch wire; A heat treatment assembly for heating the archwire; A diameter reducing assembly having an archwire mold for changing the diameter of the archwire; The wire drawing assembly is used to draw the arch wire, and the arch wire passes through the wire supply assembly, the heat treatment assembly, the diameter reducing assembly and the wire drawing assembly in sequence.

[0005] As a preferred technical solution, the wire supply assembly includes a wire supply support frame, a first wire supply mounting plate arranged on the wire supply support frame, an upper wire supply wheel arranged on the first wire supply mounting plate for storing the arch wire, a second wire supply mounting plate arranged on the wire supply support frame, and a shaping roller rotatably arranged on the second wire supply mounting plate, wherein a plurality of shaping grooves are arranged on the outer peripheral side of the shaping roller.

[0006] As a preferred technical solution, the heat treatment assembly includes a heat treatment support frame, a temperature control box arranged on the heat treatment support frame, and a heating furnace arranged on the upper side of the heat treatment support frame, the heating furnace is provided with a furnace chamber for the arch wire to pass through, and the temperature control box is electrically connected to the heating furnace.

[0007] As a preferred technical solution, the variable diameter assembly includes a variable diameter support frame, a variable diameter mounting plate fixedly arranged on the variable diameter support frame, a first guide plate and a second guide plate fixedly arranged on the upper side of the variable diameter mounting plate in parallel and spaced apart, the first guide plate is penetrated by at least one first guide groove for the arch wire to pass through, the second guide plate is penetrated by at least one second guide groove for the arch wire to pass through, the arch wire grinder is fixedly arranged in the first guide groove, the arch wire grinder is provided with a grinding hole penetrating it along the axial direction, and the grinding hole is circular or square.

[0008] As a preferred technical solution, the wire drawing assembly includes a wire drawing support frame, a wire drawing motor with a rotating shaft detachably arranged on the wire drawing support frame, and a reducer arranged on the wire drawing support frame, the reducer having an input shaft and an output shaft, a small pulley is fixedly arranged at one end of the rotating shaft away from the wire drawing motor, a large pulley is arranged at one end of the output shaft away from the reducer, a transmission shaft is fixedly arranged at one end of the output shaft away from the reducer, a guide wire wheel for winding the arch wire is sleeved on one end of the transmission shaft away from the output shaft, and the small pulley and the large pulley are sleeved with belts.

[0009] As a preferred technical solution, a first upper mounting plate is provided on the upper side of the wire drawing support frame, a first bearing seat is detachably provided on the lower side of the first upper mounting plate, and the output shaft is rotatably inserted in the first bearing seat.

[0010] As a preferred technical solution, a second upper mounting plate is provided on the upper side of the wire drawing support frame, a second bearing seat is detachably provided on the lower side of the second upper mounting plate, and the transmission shaft is rotatably inserted in the second bearing seat.

[0011] As a preferred technical solution, the outer peripheral side of the guide wire wheel is provided with a first guide wire groove and a second guide wire groove, the number of the first guide groove and the second guide groove are 2 respectively, the first guide groove is arranged corresponding to the second guide wire groove, and the first guide wire groove and the second guide wire groove are arranged corresponding to the two second guide wire grooves respectively.

[0012] As a preferred technical solution, a first positioning hole and a second positioning hole for positioning the arch wire are radially arranged on the outer peripheral side of the guide wire wheel, and the first positioning hole and the second positioning hole are respectively located in the first guide wire groove and the second guide wire groove.

[0013] The present invention also provides a method for reducing the diameter of an archwire, which is characterized by comprising the following steps: Select the material and shape of the archwire and install the archwire into the wire supply assembly; Select the corresponding archwire mold according to the shape of the archwire and install the corresponding archwire mold; Pull one end of the arch wire to pass the arch wire through the heat treatment component, the arch wire mold, and the diameter reducing component, and fix one end of the arch wire to the wire drawing component; Turn on the heat treatment component to preheat to a suitable temperature; The wire drawing assembly is turned on to draw the arch wire, and the wire drawing assembly rotates at a constant speed to complete the diameter change.

[0014] Compared with the traditional technical solution, the beneficial effects of the present invention are: 1) Improve the degree of automation of wire supply components, heat treatment components, diameter reducing components and wire drawing components, reduce manual labor intensity and improve work efficiency; 2) The archwire is embedded in the shaped groove to fix the archwire posture and avoid the problem of reverse winding of the archwire during subsequent adjustment; 3) The heating furnace heats the arch wire to a suitable temperature to improve the physical properties after heat treatment, such as tensile strength and elasticity; 4) The first guide groove and the second guide groove can guide the archwire to prevent the archwire from being deformed. The archwire mold clamps the archwire to change the diameter of the archwire, which is suitable for square and round archwires; 5) The wire drawing motor rotates to drive the small pulley to rotate, and the large pulley rotates accordingly, driving the input shaft to rotate, the reducer drives the output shaft to rotate, and drives the wire guide wheel to rotate to wind the arch wire. The wire drawing motor rotates at a constant speed, thereby driving the arch wire to be evenly wound and improving the uniformity of the arch wire diameter change; 6) The first bearing seat and the second bearing seat improve rotation stability; 7) Two first guide grooves are each provided with an arch wire mold, so that a square arch wire mold and a round arch wire mold can be installed at the same time, so that the diameter reduction processing of two types of arch wires can be achieved at the same time; 8) The archwire diameter reduction method can improve the physical properties of the archwire after heat treatment, with high processing accuracy and uniform archwire diameter reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural diagram of a device provided for one embodiment of the present invention; Figure 2 A structural diagram of a wire supply assembly provided for one embodiment of the present invention; Figure 3 A structural diagram of a diameter reducing assembly provided in accordance with an embodiment of the present invention; Figure 4 A structural diagram of a wire drawing assembly provided for one embodiment of the present invention.

[0016] exist Figure 1-Figure 41. Wire supply assembly; 101. Wire supply support frame; 102. First wire supply mounting plate; 103. Upper wire supply wheel; 104. Second wire supply mounting plate; 105. Shaping roller; 1051. Shaping groove; 106. Lower wire supply wheel; 2. Heat treatment assembly; 201. Heat treatment support frame; 202. Temperature control box; 203. Heating furnace; 204. Furnace; 3. Variable diameter assembly; 301. Arch wire grinding tool; 3011. Grinding hole; 302. Variable diameter support frame; 3021. Variable diameter mounting plate; 303. First guide plate; 3031. First guide groove; 304. Second guide plate ; 3041, second guide groove; 4, wire drawing assembly; 401, wire drawing support frame; 402, wire drawing motor; 4021, rotating shaft; 403, reducer; 4031, input shaft; 4032, output shaft; 404, small pulley; 405, large pulley; 406, wire guide wheel; 4061, first wire guide groove; 4062, second wire guide groove; 4063, first positioning hole; 4064, second positioning hole; 407, transmission shaft; 408, belt; 409, first upper mounting plate; 410, first bearing seat; 411, second upper mounting plate; 412, second bearing seat. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings.

[0018] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "top", "bottom", "left", "right", "front", "back", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0019] Please refer to Figure 1-Figure 4 An embodiment of the present invention provides a shape memory alloy archwire orthodontic diameter reducing device, comprising a wire supply component 1, a heat treatment component 2, a diameter reducing component 3 having an archwire mold 301, and a wire drawing component 4, wherein the wire supply component 1 is used to provide the archwire, the heat treatment component 2 is used to heat the archwire, the diameter reducing component 3 is used to change the diameter of the archwire, and the wire drawing component 4 is used to draw the archwire, and the archwire passes through the wire supply component 1, the heat treatment component 2, the diameter reducing component 3, and the wire drawing component 4 in sequence.

[0020] The wire supply assembly 1, the heat treatment assembly 2, the diameter reducing assembly 3 and the wire drawing assembly 4 improve the degree of automation, reduce the intensity of manual labor and improve work efficiency.

[0021] like Figure 1 and Figure 2 As shown, the wire supply assembly 1 includes a wire supply support frame 101, a first wire supply mounting plate 102 arranged on the wire supply support frame 101, an upper wire supply wheel 103 arranged on the first wire supply mounting plate 102 for storing the arch wire, a second wire supply mounting plate 104 arranged on the wire supply support frame 101, and a shaping roller 105 rotatably arranged on the second wire supply mounting plate 104, a lower wire supply wheel 106 is arranged at the lower part of the arch wire support frame, and a plurality of shaping grooves 1051 are arranged on the outer peripheral side of the shaping roller 105, and the arch wire is embedded in the shaping groove 1051, which can fix the posture of the arch wire and avoid the problem of reverse winding of the arch wire during subsequent adjustment.

[0022] like Figure 1 As shown, the heat treatment component 2 includes a heat treatment support frame 201, a temperature control box 202 arranged on the heat treatment support frame 201, and a heating furnace 203 arranged on the upper side of the heat treatment support frame 201. The heating furnace 203 is provided with a furnace chamber 204 for the arch wire to pass through. The temperature control box 202 is electrically connected to the heating furnace 203. The temperature control box 202 can accurately control the heating temperature of the heating furnace 203. The appropriate heating temperature can improve the physical properties of the arch wire, such as tensile strength and elasticity.

[0023] like Figure 1 and Figure 3 As shown, the variable diameter assembly 3 includes a variable diameter support frame 302, a variable diameter mounting plate 3021 fixedly arranged on the variable diameter support frame 302, and a first guide plate 303 and a second guide plate 304 fixedly arranged on the upper side of the variable diameter mounting plate 3021 in parallel and at intervals. The first guide plate 303 is penetrated by at least one first guide groove 3031 for the arch wire to pass through, and the second guide plate 304 is penetrated by at least one second guide groove 3041 for the arch wire to pass through. The arch wire grinder 301 is fixedly arranged on the first guide groove 3031, and the arch wire grinder 301 is provided with a grinding hole 3011 that penetrates it along the axial direction. The grinding hole 3011 is circular or square and is arranged according to the shape of the arch wire. The first guide groove 3031 and the second guide groove 3041 can guide the arch wire. The arch wire grinder 301 clamps the arch wire to change the diameter of the arch wire, and is suitable for square and round arch wires. The arch wire material is nickel-titanium memory alloy, copper-nickel-titanium memory alloy, titanium-molybdenum alloy, and stainless steel.

[0024] The archwire grinder 301 can change an archwire with a diameter of 1 mm to a diameter of 0.9 mm. The diameter of the grinding hole 3011 is 0.9 mm, with an upper and lower deviation of 0.05 mm. The diameter of the archwire before the diameter change is 1 mm, and the diameter of the archwire after processing is 0.9 mm, with high processing accuracy.

[0025] like Figure 1 and Figure 4 As shown, the wire drawing assembly 4 includes a wire drawing support frame 401, a wire drawing motor 402 with a rotating shaft 4021 detachably arranged on the wire drawing support frame 401, and a reducer 403 arranged on the wire drawing support frame 401, wherein the reducer 403 has an input shaft 4031 and an output shaft 4032, a small pulley 404 is fixedly arranged at one end of the rotating shaft 4021 away from the wire drawing motor 402, a large pulley 405 is arranged at one end of the output shaft 4032 away from the reducer 403, and a large pulley 406 is arranged at one end of the output shaft 4032 away from the reducer 403. A transmission shaft 407 is fixedly set at the end, and the end of the transmission shaft 407 facing away from the output shaft 4032 is sleeved with a wire guide wheel 406 for winding the arch wire, and the small pulley 404 and the large pulley 405 are sleeved with a belt 408. The wire drawing motor 402 rotates to drive the small pulley 404 to rotate, and the large pulley 405 rotates accordingly, driving the input shaft 4031 to rotate, and the reducer 403 drives the output shaft 4032 to rotate, and drives the wire guide wheel 406 to rotate to wind the arch wire. The wire drawing motor 402 rotates at a constant speed, thereby driving the arch wire to be evenly wound, thereby improving the uniformity of the arch wire diameter change.

[0026] Both the wire drawing motor 402 and the temperature control box 202 can be controlled by the PLC integrated system, and the parameters can be adjusted accurately to improve the uniformity of the arch wire and the physical properties of the arch wire.

[0027] like Figure 1 and Figure 4 As shown, a first upper mounting plate 409 is provided on the upper side of the wire drawing support frame 401, a first bearing seat 410 is detachably provided on the lower side of the first upper mounting plate 409, the output shaft 4032 is rotatably inserted in the first bearing seat 410, a second upper mounting plate 411 is provided on the upper side of the wire drawing support frame 401, a second bearing seat 412 is detachably provided on the lower side of the second upper mounting plate 411, the transmission shaft 407 is rotatably inserted in the second bearing seat 412, the first upper mounting plate 409 and the second upper mounting plate 411 are arranged in parallel and spaced apart, the first bearing seat 410 improves the rotation stability of the output shaft 4032, and the second bearing seat 412 improves the rotation stability of the transmission shaft 407.

[0028] like Figure 4 As shown, the outer peripheral side of the guide wire wheel 406 is provided with a first guide wire groove 4061 and a second guide wire groove 4062, the number of the first guide groove 3031 and the second guide groove 3041 are respectively 2, the first guide groove 3031 is arranged corresponding to the second guide wire groove 4062, the first guide wire groove 4061 and the second guide wire groove 4062 are arranged corresponding to the two second guide wire grooves 4062 respectively, the first guide wire groove 4061 and the second guide wire groove 4062 are used for arranging the arch wire and separating the two reels of arch wire for subsequent loading and unloading.

[0029] like Figure 4As shown, the outer peripheral side of the guide wire wheel 406 is radially provided with a first positioning hole 4063 and a second positioning hole 4064 for positioning the arch wire, the first positioning hole 4063 is located in the first guide wire groove 4061, and the second positioning hole 4064 is located in the second guide wire groove 4062. One end of the arch wire is fixedly inserted into the positioning hole, so that one end of the arch wire can be fixed, and the guide wire wheel 406 is rotated to wind the arch wire around the first guide wire groove 4061 and the second guide wire groove 4062.

[0030] See also Figure 1-Figure 4 The present invention also provides a method for reducing the diameter of an archwire, which is characterized by comprising the following steps: Select the material and shape of the arch wire, and install the arch wire into the wire supply assembly. Specifically, install one reel of arch wire on the upper wire supply wheel 103, and install one reel of arch wire on the lower wire supply wheel 106; Select the corresponding archwire grinder 301 according to the shape of the archwire, and install the corresponding archwire grinder 301. Specifically, the archwire grinder 301 is selected to have 2 squares or 2 circles, or 1 circle and 1 square. The diameter of the archwire is 1 mm, and the diameter of the grinding hole 3011 is 0.9 mm. Pull one end of the arch wire to pass through the heat treatment component 2, the arch wire grinder 301, and the diameter reducing component 3, and fix one end of the arch wire to the wire drawing component 4. Specifically, the arch wire is passed through the furnace 204, the arch wire grinder 301, the first guide groove 3031, and the second guide groove 3041, and then one end of one of the arch wires is inserted into the first positioning hole 4063 for fixation, and one end of the other arch wire is inserted into the second positioning hole 4064 for fixation. Before threading, one section of the arch wire needs to be waxed and burned until it turns red. At this time, it becomes soft. Use tools to tighten and break the two ends of this section of the arch wire. At this time, the diameter of the end face of the arch wire is smaller than the diameter of the grinding hole 3011. In this way, the arch wire can be passed through the furnace 204 and then through the grinding hole 3011; The heat treatment component 2 is turned on for preheating to a suitable temperature. Specifically, the temperature control box 202 adjusts the temperature of the heating furnace 203 to 590-610° C., specifically, the heating temperature is 600° C., and the heating is performed until the diameter reduction is completed; The wire drawing assembly 4 is turned on to draw the arch wire, and the wire drawing assembly 4 rotates at a uniform speed to complete the diameter change. Specifically, the wire drawing motor 402 is turned on, and the wire drawing motor 402 rotates at a uniform speed, and drives the wire guide wheel 406 to rotate at a uniform speed through the reduction box. The speed of the wire drawing motor 402 is 920-980r / min, and the speed of the wire guide wheel 406 is 1-3r / min. Specifically, the speed of the wire drawing motor 402 is 960r / min, and the speed of the wire guide wheel 406 is 2r / min. In this way, the diameter change of the arch wire is uniform. If the speed of the wire guide wheel 406 is greater than 2r / min, it will cause uneven diameter change of the arch wire. If the speed of the wire guide wheel 406 is less than 1 r / min, it will lead to poor processing efficiency.

[0031] The archwire diameter reduction method can improve the physical properties of the archwire after heat treatment, with high processing accuracy and uniform archwire diameter reduction.

[0032] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. In the description of this specification, the description of the reference term "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this specification. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0033] The above description is only an example of one or more embodiments of the present specification and is not intended to limit one or more embodiments of the present specification. For those skilled in the art, one or more embodiments of the present specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present specification shall be included in the scope of the claims.

Claims

1. A shape memory alloy archwire orthodontic diameter reducing device, characterized in that: include: A wire supply assembly, used for providing arch wire; A heat treatment assembly for heating the archwire; A diameter reducing assembly having an archwire mold for changing the diameter of the archwire; The wire drawing assembly is used to draw the arch wire, and the arch wire passes through the wire supply assembly, the heat treatment assembly, the diameter reducing assembly and the wire drawing assembly in sequence.

2. The shape memory alloy archwire orthodontic diameter reducing device according to claim 1, characterized in that: The wire supply assembly includes a wire supply support frame, a first wire supply mounting plate arranged on the wire supply support frame, an upper wire supply wheel arranged on the first wire supply mounting plate for storing the arch wire, a second wire supply mounting plate arranged on the wire supply support frame, and a shaping roller rotatably arranged on the second wire supply mounting plate, wherein a plurality of shaping grooves are arranged on the outer peripheral side of the shaping roller.

3. The shape memory alloy archwire orthodontic diameter reducing device according to claim 1, characterized in that: The heat treatment assembly includes a heat treatment support frame, a temperature control box arranged on the heat treatment support frame, and a heating furnace arranged on the upper side of the heat treatment support frame. The heating furnace is provided with a furnace chamber for the arch wire to pass through, and the temperature control box is electrically connected to the heating furnace.

4. The shape memory alloy archwire orthodontic diameter reducing device according to claim 1, characterized in that: The variable diameter assembly includes a variable diameter support frame, a variable diameter mounting plate fixedly arranged on the variable diameter support frame, a first guide plate and a second guide plate fixedly arranged on the upper side of the variable diameter mounting plate in parallel and at intervals, the first guide plate is penetrated by at least one first guide groove for the arch wire to pass through, the second guide plate is penetrated by at least one second guide groove for the arch wire to pass through, the arch wire grinder is fixedly arranged in the first guide groove, the arch wire grinder is provided with a grinding hole penetrating the arch wire along the axial direction, and the grinding hole is circular or square.

5. The shape memory alloy archwire orthodontic diameter reducing device according to claim 4, characterized in that: The wire drawing assembly includes a wire drawing support frame, a wire drawing motor with a rotating shaft detachably arranged on the wire drawing support frame, and a reducer arranged on the wire drawing support frame, the reducer having an input shaft and an output shaft, a small pulley is fixedly arranged at one end of the rotating shaft away from the wire drawing motor, a large pulley is arranged at one end of the output shaft away from the reducer, a transmission shaft is fixedly arranged at one end of the output shaft away from the reducer, a guide wire wheel for winding the arch wire is sleeved on one end of the transmission shaft away from the output shaft, and belts are sleeved on the small pulley and the large pulley.

6. The shape memory alloy archwire orthodontic diameter reducing device according to claim 5, characterized in that: A first upper mounting plate is disposed on the upper side of the wire drawing support frame, a first bearing seat is detachably disposed on the lower side of the first upper mounting plate, and the output shaft is rotatably inserted in the first bearing seat.

7. The shape memory alloy archwire orthodontic diameter reducing device according to claim 5, characterized in that: A second upper mounting plate is disposed on the upper side of the wire drawing support frame, a second bearing seat is detachably disposed on the lower side of the second upper mounting plate, and the transmission shaft is rotatably inserted in the second bearing seat.

8. The shape memory alloy archwire orthodontic diameter reducing device according to claim 5, characterized in that: The outer peripheral side of the guide wire wheel is provided with a first guide wire groove and a second guide wire groove, the number of the first guide groove and the second guide groove are 2 respectively, the first guide groove is arranged corresponding to the second guide wire groove, and the first guide wire groove and the second guide wire groove are arranged corresponding to the two second guide wire grooves respectively.

9. The shape memory alloy archwire orthodontic diameter reducing device according to claim 8, characterized in that: The outer peripheral side of the guide wire wheel is radially provided with a first positioning hole and a second positioning hole for positioning the arch wire, and the first positioning hole and the second positioning hole are respectively located in the first guide wire groove and the second guide wire groove.

10. A method for reducing the diameter of an archwire, characterized in that: The following steps are involved: Select the material and shape of the archwire and install the archwire into the wire supply assembly; Select the corresponding archwire mold according to the shape of the archwire and install the corresponding archwire mold; Pull one end of the arch wire to pass the arch wire through the heat treatment component, the arch wire mold, and the diameter reducing component, and fix one end of the arch wire to the wire drawing component; Turn on the heat treatment component to preheat to a suitable temperature; The wire drawing assembly is turned on to draw the arch wire, and the wire drawing assembly rotates at a constant speed to complete the diameter change.

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