Double-arrow bending equipment with horizontal fixing seat

Abstract

The utility model relates to double-arrow bending equipment with a horizontal fixing seat and a method. The double-arrow bending equipment structurally comprises a rotary conveying structure, an up-down sliding structure, a rotary power structure, a support structure, a calibration structure, a fixed bending structure, a bending rod and a cutter. Wherein a fixed seat in the fixed bending structure is horizontally mounted, and a double-arrow clamp on the Hough retainer can be bent under the matching of a bending head.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of orthodontics, in particular to a double arrow bending device with horizontal fixed seat. BACKGROUND

[0002] After the end of orthodontic treatment, it is necessary to prevent the teeth from returning to their original position after orthodontic treatment by customizing Hawley retainers, which are composed of self-curing resin and steel wire. The steel wire used is usually a circular stainless steel wire with a length of 125 meters and a diameter of 0.8mm or 0.7mm, which is manually straightened and then bent. A double arrow clasp (Adams clasp) is usually placed on the first molar, and a double curved labial arch is placed in the anterior tooth area. The width of the first molar buccal and lingual side is 8∽10mm, the length is 11∽13mm, and the height is 5∽8mm.

[0003] The existing manufacturing method is to manually bend the double arrow clasp and the double curved labial arch, but due to the complex structure of the double shear head clasp, it requires skilled and experienced personnel to complete, and the bending operation takes a long time, and long-term work is easy to fatigue, so automatic equipment is needed to bend the high-difficulty double shear head clasp and double curved labial arch.

[0004] Patent CN202121591655 introduces a traceless bending forming device, but for some extremely difficult wire bending structures, it still cannot meet the requirements and cannot bend the double arrow clasp (Adams clasp) on the Hawley retainer. Patent US20160114377A1 introduces a device for customizing the shape of the correction arch wire, which is only suitable for bending small sections of straight steel wire. Patent US11027323B2 introduces an automatic bending equipment for wire bending machine, but this equipment is an industrial large-scale equipment, which cannot bend the personalized double arrow. SUMMARY

[0005] The purpose of the present application is to realize automatic bending of high-difficulty double-arrow card, reduce the difficulty of manual operation, the inner included angle formed on both sides of the bent arrow is 20-25°, the minimum diameter of the inner arc of the arrow is 0.5-1mm, and no collision is realized. At the same time, the above-mentioned problems of high difficulty and low efficiency of manual bending of steel wire are solved, and the bending efficiency and accuracy are improved. The difficulty lies in that the inner included angle of the double-arrow card is very small, which is 20-25°, and the steel wire needs to be bent by 180° to rebound to about 25°, and the steel wire needs to be bent by 190° to rebound to 20°. The diameter of the inner arc of the arrow is 0.5-1mm, so the thickness of the steel wire around the bending is also only 0.5-1mm, which requires to reduce the resistance force generated during bending as much as possible, and the structure of the double-arrow card is complex, the space around the mesial and distal of the molar is small, and automatic bending is easy to collide. In addition, since the steel wire is bent and cut, wear is inevitable, and the wear part needs to be replaced, so the calibration structure needs to be accurately designed to ensure quick calibration after replacing the wear part, so that the equipment can start automatic bending work.

[0006] To achieve the above purpose, the present application provides a double-arrow bending equipment with a horizontal fixed seat, which comprises a support structure, a rotating conveying structure, a straightening structure, an up-down sliding structure, a rotating power structure, a calibration structure, a fixed bending structure, a bending rod and a cutter, and the fixed seat is horizontally installed on the upper plate.

[0007] Preferably, the support structure comprises an upper plate, a lower plate, a rear plate and left and right side plates, which are 90° to each other, and left and right pull rods are located on the left and right sides of the bending head structure, connecting the upper plate and the lower plate, and serving to protect and fix the rotating power structure.

[0008] Preferably, the first vertical height of the up-down sliding structure is that the center point of the side notch of the first bending table is flush with the center point of the steel wire, the second vertical height is that the center point of the side notch of the second bending table is flush with the center point of the steel wire, and the third vertical height is that the cutting edge of the cutter is higher than the highest point of the steel wire.

[0009] Preferably, the rotating power structure comprises a bending rod installed on a pair of ball screw fixed seats with angular contact bearings, a speed reducer connected to the bending rod through a shaft coupling, and a calibration block structure composed of a side slope, an upper side, a lower side, an inner arc surface, an upper notch and a lower notch, wherein the side slope of the calibration structure is engaged with the side slope of the fixed seat, the upper side of the calibration structure is engaged with the side surface of the bending head, and the inner arc surface of the calibration structure is engaged with the bending rod.

[0010] Preferably, the rotating conveying structure comprises a three-petal spring clamping device, a screw guide rail sliding table conveying device and a hollow rotating device.

[0011] Further, the three-limb spring chuck of the rotating conveying structure and the fixed seat have a multi-layer telescopic sleeve with an inner diameter of 1 mm and an outer diameter of 5 mm, which is made of stainless steel, high-hardness PC, and other high-hardness and wear-resistant materials. When the circular arc between the AB of the bent U-shaped structure is bent, the bending table generates a backward thrust on the steel wire, which causes the steel wire suspended between the three-limb spring chuck of the rotating conveying structure and the fixed seat to twist, damaging the straightness of the straightened steel wire. Therefore, the multi-layer telescopic sleeve placed between the three-limb spring chuck and the fixed seat can effectively prevent the steel wire from being twisted and deformed when it is pushed backward, improve accuracy, and can also be telescopic, without hindering the conveying of the steel wire. The straightener of the straightening structure is installed on the hollow rotating shaft. When the steel wire rotates, the straightening structure rotates in the same direction, preventing the steel wire between the three-limb spring chuck and the straightener from twisting, causing the steel wire to be easily broken due to the decline in performance. The hollow rotating shaft can be driven by a synchronous wheel or a hollow rotating platform to provide rotating power.

[0012] Further, the hollow rotating device is composed of a hollow rotating table, a driving wheel, a synchronous wheel, and a synchronous belt. The center shaft of the hollow rotating table corresponds to the center shaft of the three-limb spring chuck. The synchronous wheel is fixed on the hollow rotating table and drives the hollow rotating table to rotate synchronously. The motor drives the driving wheel to rotate. The synchronous wheel rotates synchronously with the driving wheel under the drive of the synchronous belt, and simultaneously drives the clamped steel wire to rotate.

[0013] Preferably, the fixed bending structure of the double-arrow bending device is composed of a fixed seat, a fixed seat support, and a bending head. The fixed seat is connected to the fixed seat support through four U-shaped mounting holes. The fixed seat bottom rectangular block is embedded in the fixed seat support. The fixed seat support is connected to the upper plate through two positioning pins and four screw holes. The bending head is connected to the bending rod through two positioning pins and two screw holes. The cutter blade part is attached to the edge of the fixed seat discharge port to cut off the steel wire. As the number of uses increases, the discharge port wears out. The screws in the four U-shaped mounting holes can be loosened. The fixed seat moves towards the cutter blade part. The fixed seat bottom rectangular block can prevent the fixed seat from shifting left and right and ensure that it can move linearly when adjusting.

[0014] Further, the bending head rotation center point is located on the center line of the fixed seat steel wire passage, and the front and back distance from the fixed seat discharge port center point is not more than 2 mm, the outer side surface of the bending head is 180-190° with the steel wire passage, the shortest distance between the inner wall of the steel wire passage and the outer side surface is 0.2-1.5 mm, the left and right second bending tables of the bending head are symmetrically distributed on the left and right sides of the first bending table, the upper end surface diameter of the first bending table and the second bending table is 1-3 mm, the distance between the upper end surface of the first bending table and the upper end surface of the second bending table is 1-8 mm, the distance between the upper end surface of the first bending table and the lower end surface of the bending head is 10-20 mm, the distance between the center point of the side notch of the first bending table and the center point of the fixed seat discharge port is 1-5 mm, and the distance between the center point of the side notch of the second bending table and the center point of the fixed seat discharge port is 2.5-6 mm.

[0015] Further, when the bending head has the first and second bending tables at the same time, the closer the distance between the center point of the side notch of the first bending table and the center point of the fixed seat discharge port, the smoother the arc that can be bent, and the farther the distance, the smaller the straight line segment of the bent arc is not smooth enough, and only an angle of 0-90° can be bent. The circular arc U type inside the double-curved lip bow, the circular arc diameter AB is about 4 mm, the distance between the side notch of the first bending table and the center point of the fixed seat discharge port is very close, so that the circular arc U type with a circular arc diameter AB of 4 mm can be bent. The farther the distance between the center point of the side notch of the second bending table and the center point of the fixed seat discharge port, the higher the double arrow that is bent, and 40°-190° is bent by the second bending table.

[0016] Further, when the fixed bending structure has only the first bending table, both angles within 90 degrees and angles of 180° need to be bent, and the distance between the center point of the side notch of the first bending table and the center point of the fixed seat discharge port needs to reach 3.5 mm or more to achieve bending of 180°. The longer the distance, the higher the height of the double arrow, but it cannot exceed the height of the tooth, otherwise it will affect the occlusion when the double arrow is worn in the patient's oral cavity, and the smoothness of the U-shaped arc bent out is worse. Since the height of the first molar is usually 5-8 mm, and the steel wire diameter is 0.8 mm, when the distance between the center point of the side notch of the first bending table and the center point of the fixed seat discharge port is set to 3.5 mm, the height of the bent arrow is 3.5 mm+0.8 mm=4.3 mm, which is less than the minimum height of the first molar of 5 mm.

[0017] Further, the fixed bending structure is characterized in that the fixed seat is composed of a wire channel, a discharge port, an outer side surface, an outer inclined surface, an upper concave surface, a rear concave surface, a lower concave surface, a lower concave surface body part, an upper end surface of the discharge port, a lower end surface of the discharge port, a side end surface of the discharge port, an upper end surface body part, and a lower end surface body part, wherein the outer side surface, the upper concave surface, the rear concave surface, and the lower concave surface form a side notch on the side surface of the fixed seat, and the bending head is composed of a first bending table, a second bending table, a lower notch of the bending head, a middle notch of the bending head, a rear inclined surface of the first bending table, an inclined surface of the bending head, a side inclined surface of the bending head, a side surface of the bending head, a positioning pin hole, a bending head fixing screw hole, a cutter mounting groove, and a cutter fixing screw hole.

[0018] Further, the fixed bending structure can be simplified in that the lower concave surface of the fixed seat has a lower concave surface body part gap, the bending head does not have a lower notch, and the fixed seat is composed of a wire channel, a discharge port, an outer side surface, an outer inclined surface, an upper concave surface, a lower concave surface, a lower concave surface body part gap, a rear concave surface, an upper end surface of the discharge port, a lower end surface of the discharge port, a side end surface of the discharge port, an upper end surface body part, and a lower end surface body part, wherein the outer side surface, the upper concave surface, the rear concave surface, and the lower concave surface form a side notch on the side surface of the fixed seat, and the bending head is composed of a first bending table, a second bending table, a middle notch of the bending head, a rear inclined surface of the first bending table, an inclined surface of the bending head, a side inclined surface of the bending head, a side surface of the bending head, a positioning pin hole, a bending head fixing screw hole, a cutter mounting groove, and a cutter fixing screw hole. This fixed bending structure is a double-bending-head structure, the lower concave surface of the fixed seat has a lower gap, and the bending head does not have a lower notch. The position of the original lower notch of the bending head is a smooth arc surface, which is just engaged with the lower concave surface body part gap of the fixed seat, thereby preventing collision during the bending of the wire and ensuring the strength of the bent wire.

[0019] Further, the fixed bending structure can be simplified in that the fixed seat does not have a lower concave surface and a lower concave surface body part, the bending head does not have a lower notch, and the fixed seat is composed of a wire channel, a discharge port, an outer side surface, an outer inclined surface, an upper concave surface, a rear concave surface, an upper end surface of the discharge port, a side end surface of the discharge port, an upper end surface body part, wherein the outer side surface, the upper concave surface, and the rear concave surface form a side notch on the side surface of the fixed seat, and the bending head is composed of a first bending table, a second bending table, a middle notch of the bending head, a rear inclined surface of the first bending table, an inclined surface of the bending head, a side inclined surface of the bending head, a side surface of the bending head, a positioning pin hole, a bending head fixing screw hole, a cutter mounting groove, and a cutter fixing screw hole. This fixed bending structure does not have a lower concave surface and a lower concave surface body part, and the bending head does not have a lower notch. The larger side concave surface area can better compress and adhere to the wire. The absence of a lower concave surface and a lower concave surface body part prevents collision during bending and ensures the strength of the bent wire.

[0020] Further, the fixed bending structure can be simplified, characterized in that the fixed seat has no lower concave surface and lower concave surface body, and the bending head has only the first bending table and has no second bending table, bending table lower notch and middle notch, the fixed seat is composed of steel wire channel, discharge port, outer side surface, outer inclined surface, upper concave surface, rear concave surface, discharge port upper end surface, discharge port lower end surface, discharge port side end surface, upper end surface body and lower end surface body, and the bending head is composed of first bending table, bending head middle notch, first bending table rear inclined surface, bending head slope, bending head side inclined surface, bending head side surface, positioning pin hole, bending head fixing screw hole, cutter installation slot and cutter fixing screw hole.

[0021] Further, the fixed bending structure can be simplified, characterized in that the fixed seat has no lower concave surface and lower concave surface body, and the bending head has only the first bending table and has no second bending table, bending table lower notch and middle notch, the fixed seat is composed of steel wire channel, discharge port, outer side surface, outer inclined surface, upper concave surface, rear concave surface, discharge port upper end surface, discharge port lower end surface, discharge port side end surface, upper end surface body and lower end surface body, and the bending head is composed of first bending table, bending head middle notch, first bending table rear inclined surface, bending head slope, bending head side inclined surface, positioning pin hole, bending head fixing screw hole, cutter installation slot and cutter fixing screw hole.

[0022] Further, the bending head and the cutter are detachable structures, and the old and worn bending head and cutter can be replaced at any time. When the bending head and the cutter are replaced, the screws in the bending head fixing screw hole and the cutter fixing screw hole are taken out, and the new bending head and cutter are replaced. The operation is simple, and timely replacement of the new bending head can reduce machine damage and improve service life.

[0023] Further, the left and right end side notches of the fixed bending structure are symmetrical, and the outer side surface, upper concave surface, rear concave surface and lower concave surface on the side notch are to ensure that the already bent arrow cannot collide, and at the same time, the strength of the already bent steel wire is ensured.

[0024] Further, the bending head has single bending head structure and double bending head structure, the bending table of the bending head is designed with bending head lower notch and bending head middle notch, the bending head lower notch is to avoid collision between the bending head and the left and right side end surfaces of the discharge port of the fixed seat or the already bent steel wire in the bending process, the lower end of the first bending table is the bending head middle notch, the bending head middle notch is also to avoid collision between the bending head and the upper and lower end surfaces of the discharge port of the fixed seat or the already bent steel wire in the bending process, and at the same time, the design of the two notches also leaves enough space for the cutter.

[0025] Further, the calibration structure is used to calibrate the position of the bending head and the fixed seat head, so that the center lines of the two coincide. The calibration structure is slowly pushed along the horizontal direction from the bending head to the fixed seat head. When the calibration structure is completely fitted with the bending head and the fixed seat head, the original position sensor of the bending rod is adjusted from the unlit position to the lit position, and is screwed, so that the hardware original position of the bending rod is set, and the calibration is completed.

[0026] The double-arrow bending device bends the double-arrow clamp from both ends, and the specific bending sequence is as follows:

[0027] First, the distolingual vertical foot segment is bent, followed by the distolingual vertical segment, the distolingual horizontal segment, the distobuccal horizontal segment, the distobuccal vertical segment, the distal arrow distal segment, the distal arrow proximal segment, the horizontal segment, the proximal arrow distal segment, the proximal arrow proximal segment, the proximal buccal vertical segment, the proximal buccal horizontal segment, the proximal lingual horizontal segment, the proximal lingual vertical segment, and finally the proximal lingual vertical foot segment.

[0028] The fixed bending structure bending process includes bending operations on the above-mentioned several components of the double-arrow clamp, and the bending of the arrow is particularly important. After the fixed bending structure is bent by a large angle of 180°-190°, the bent wire will form an internal angle of 20°-25° in the arrow according to the different materials.

[0029] According to the double-arrow bending device with a horizontal fixed seat, the steel wire is progressively conveyed by the steel wire conveying structure, the steel wire is bent according to the bending parameters in the preset program by the steel wire bending structure cooperating with the steel wire fixing structure, the bending device in the bending structure adopts a new bending design, and the bending device has the advantages of high precision and high efficiency, effectively solves the problems of large bending difficulty and low efficiency of the existing steel wire bending by manual bending, and greatly improves and upgrades the existing bending machine. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0031] Figure 1 It is a three-dimensional front view of the structure of the bending device;

[0032] Figure 2 It is a three-dimensional view of the rotating power structure of the bending device.

[0033] Figure 3 A three-dimensional view of a fixed bending structure of a bending device;

[0034] Figure 4 A three-dimensional view of a fixed bending structure of a double bending head of a bending device;

[0035] Figure 5 A three-dimensional view of a fixed bending structure of a double bending head of a bending device;

[0036] Figure 6 A three-dimensional view of a fixed bending structure of a double bending head of a bending device;

[0037] Figure 7 A three-dimensional view of a fixed bending structure of a single bending head of a bending device;

[0038] Figure 8 A three-dimensional view of a fixed bending structure of a single bending head of a bending device;

[0039] Figure 9 A schematic view of a circular arc U-shaped fixed bending structure of a bending device;

[0040] Figure 10 、 Figure 10-1 A horizontal cross-sectional view of a steel wire center point;

[0041] Figure 11 A three-dimensional view of a calibration structure;

[0042] Figure 11-1 A three-dimensional view of a calibration structure of a fixed bending structure;

[0043] Figure 12 A schematic view of each part of a fixed bending structure of a double arrow head;

[0044] In the figure: 00-wire, 006-distal arrowhead distal segment, 009-proximal arrowhead proximal segment, 021-distal lingual vertical foot segment, 022-distal lingual vertical segment, 023-distal lingual horizontal segment, 024-distal buccal horizontal segment, 025-distal buccal vertical segment, 026-distal arrowhead distal segment, 027-distal arrowhead proximal segment, 028-horizontal segment, 029-proximal arrowhead distal segment, 030-proximal arrowhead proximal segment, 031-proximal buccal vertical segment, 032-proximal buccal horizontal segment, 033-proximal lingual horizontal segment, 034-proximal lingual vertical segment, 035-proximal lingual vertical foot segment, 100-rotary conveying structure, 110-three-petal spring, 120-wire screw guide sliding table, 130-hollow rotary device, 200-up and down sliding structure, 300-rotary power structure, 301-angular contact bearing, 302-ball screw fixing seat, 303-reduction motor, 304-coupling, 400-support structure, 401-upper plate, 402-lower plate, 403-rear plate, 404-left and right side plates, 405-left and right pull rods, 500-calibration structure, 501-side bevel, 502-upper side surface, 503-lower side surface, 504-inner arc surface, 505-upper notch, 506-lower notch, 600-fixed bending structure, 601-fixing seat, 602-fixing seat support, 603-bending head, 604-U-shaped mounting hole, 605-fixing seat bottom rectangular block, 606-positioning pin, 607-screw hole, 611-wire channel, 612-discharge port, 613-outer side surface, 614-upper concave surface, 615-rear concave surface, 616-lower concave surface, 617-lower concave surface body part, 618-discharge port upper end surface, 619-discharge port lower end surface, 620-discharge port side end surface, 621-upper end surface body part, 622-lower end surface body part, 623-side notch, 624-wire channel inner wall, 625-lower concave surface body part gap, 626-outer bevel, 631-first bending table, 632-second bending table, 633-bending head lower notch, 634-bending head middle notch, 635-bending head side bevel, 636-bending head slope, 637-positioning pin hole, 638-bending head fixing screw hole, 639-cutter mounting groove, 640-cutter fixing screw hole, 641-first bending table rear bevel, 642-first bending table side notch center point, 643-second bending table side notch center point, 644-bending head side surface, 700-bending rod, 800-cutter, 801-cutter cutting edge, 900-straightening structure, 901-hollow rotary disc, 902-straightener, 903-material storage disc, 904-hollow rotary shaft, 905-multilayer telescopic sleeve. DETAILED DESCRIPTION

[0045] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters throughout the figures denote the same or like elements or elements having the same or similar functions. The embodiments described below are exemplary and are intended to be illustrative of the present application and are not to be construed as limiting the present application. All other embodiments, which would occur to persons of ordinary skill in the art, based on the embodiments shown in the present application, are within the scope of the present application.

[0046] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0047] Referring to Figure 1 A double-arrow bending device with a horizontal fixed seat comprises a rotating conveying structure 100, an up-down sliding structure 200, a rotating power structure 300, a support structure 400, a calibration structure 500, a fixed bending structure 600, a bending rod 700, a cutter 800, 900, a straightening structure, and the fixed seat 601 is horizontally installed on the upper plate.

[0048] Referring to Figure 1 The rotating conveying structure is composed of a three-petal spring clamping device 110, a lead screw guide rail sliding table conveying device 120, and a hollow rotating device 130.

[0049] Referring to Figure 1 The straightening structure comprises a hollow rotating disc 901, a straightener 902, a storage disc 903, a hollow rotating shaft 904, and a multi-layer telescopic sleeve 905. The straightener of the straightening structure is installed on the hollow rotating shaft. When the steel wire rotates, the straightening structure rotates in the same direction to prevent the steel wire from being twisted between the three-petal spring chuck and the straightener, which causes the performance of the steel wire to decrease and leads to easy breakage. The hollow rotating shaft can be driven by a synchronous wheel or a hollow rotating platform to provide rotating power. The multi-layer telescopic sleeve placed between the three-petal spring chuck and the fixed seat can effectively prevent the steel wire from being twisted and deformed when it is pushed backward, improve accuracy, and can be telescopic without hindering the conveying of the steel wire.

[0050] Referring to Figure 2, the rotating power structure is characterized in that the bending rod is installed on a pair of ball screw fixing seats 302 with angular contact bearings 301, and a speed reducer motor 303 is connected to the bending rod through a shaft coupling 304; the support structure beside the rotating power structure comprises an upper plate 401, a lower plate 402, a rear plate 403, left and right side plates 404, which are 90 degrees to each other, and left and right pull rods 405, which are located on the left and right sides of the bending head structure, connect the upper plate and the lower plate, and the support structure plays a role of protecting and fixing the rotating power structure.

[0051] Please refer to Figure 3 The fixed bending structure 600 of the double-arrow bending device comprises a fixing seat 601, a fixing seat support 602, and a bending head 603, the fixing seat 601 is connected to the fixing seat support through four U-shaped mounting holes 604, a rectangular block 605 at the bottom of the fixing seat is embedded into the fixing seat support, the fixing seat support is connected to the upper plate through two positioning pins 606 and four screw holes 607, the bending head is connected to the bending rod through two positioning pins and two screw holes, the rotating center point of the bending head is located on the center line of the steel wire passage of the fixing seat, and the front-to-back distance between the rotating center point and the center point of the discharge port of the fixing seat is not more than 2 mm, the outer side surface of the bending head forms an angle of 180-190 degrees with the steel wire passage, the shortest distance between the inner wall of the steel wire passage and the outer side surface is 0.2-1.5 mm, the left and right second bending tables of the bending head are symmetrically distributed on the left and right sides of the first bending table, the diameters of the upper end surfaces of the first and second bending tables are 1-3 mm, the distance between the upper end surface of the first bending table and the upper end surface of the second bending table is 1-8 mm, the distance between the upper end surface of the first bending table and the lower end surface of the bending head is 10-20 mm, the distance between the center point of the side notch of the first bending table and the center point of the discharge port of the fixing seat is 1-5 mm, and the distance between the center point of the side notch of the second bending table and the center point of the discharge port of the fixing seat is 2.5-6 mm.

[0052] Please refer to Figure 4 The first vertical height of the up-and-down sliding structure is that the center point of the side notch of the first bending table is flush with the center point of the steel wire 00, the second vertical height is that the center point of the side notch of the second bending table is flush with the center point of the steel wire, and the third vertical height is that the cutting blade edge 801 is higher than the highest point of the steel wire.

[0053] Please refer to Figure 4A fixed bending structure, the fixed seat is composed of a steel wire channel 611, a discharge port 612, an outer side surface 613, an outer inclined surface 626, an upper concave surface 614, a rear concave surface 615, a lower concave surface 616, a lower concave surface body part 617, an upper end surface of the discharge port 618, a lower end surface of the discharge port 619, a side end surface of the discharge port 620, an upper end surface body part 621, and a lower end surface body part 622. The outer side surface, the upper concave surface, the rear concave surface, and the lower concave surface form a side notch 623 on the side surface of the fixed seat. The outer side surface is parallel to the steel wire channel. The bending head is composed of a first bending table 631, a second bending table 632, a lower notch of the bending head 633, a middle notch of the bending head 634, a side surface of the bending head 635, an inclined surface of the bending head 636, a positioning pin hole 637, a bending head fixing screw hole 638, a cutter mounting groove 639, a cutter fixing screw hole 640, and a rear inclined surface of the first bending table 641.

[0054] Please refer to Figure 5 A fixed bending structure, the lower concave surface of the fixed seat has a lower concave surface body part gap, and the bending head does not have a lower notch. The fixed bending structure does not have a lower notch of the bending head. The original position of the lower notch is a smooth arc surface, which is matched with the lower concave surface body part gap of the fixed seat. This can prevent collision during bending and ensure the strength of the bent steel wire.

[0055] Please refer to Figure 6 A fixed bending structure, the fixed bending structure does not have a lower concave surface and a lower concave surface body part, and the bending head does not have a lower notch. The larger area of the side concave surface can better compress and adhere to the steel wire. The absence of a lower concave surface and a lower concave surface body part prevents collision during bending and ensures the strength of the bent steel wire.

[0056] Please refer to Figure 7 A fixed bending structure, the fixed seat does not have a lower concave surface and a lower concave surface body part, and the bending head only has a first bending table. It does not have a second bending table, a lower notch of the bending table, and a middle notch of the bending head. The single-bending-head structure determines that the steel wire bending is completed by the first bending table. The 180° bending is done in two steps. The absence of a second bending table, a lower notch of the fixed seat, and a lower notch body part, as well as a lower notch of the bending head and a middle notch, avoids collision during steel wire bending.

[0057] Please refer to Figure 8 A fixed bending structure, the fixed seat does not have a lower concave surface and a lower concave surface body part, and the bending head only has a first bending table. It does not have a second bending table, a lower notch of the bending table, and a middle notch of the bending head.

[0058] Please refer to Figure 9, when the bending head has both the first and second bending tables, the closer the center point of the side notch of the first bending table is to the center point of the discharge port of the fixed seat, the smoother the arc that can be bent is, and the farther the center point of the side notch of the first bending table is to the center point of the discharge port of the fixed seat, the smaller the straight line segment of the bent arc is, and the angle that can be bent is only 0°-90°. The circular arc U-shaped inside the double-curved lip arch has a circular arc diameter AB of about 4 mm, and the distance between the center point of the side notch of the first bending table and the center point of the discharge port of the fixed seat is very close, so that the circular arc U-shaped with a circular arc diameter AB of 4 mm can be bent. The farther the center point of the side notch of the second bending table is to the center point of the discharge port of the fixed seat, the higher the double arrow that is bent is, and the angle that is bent by the second bending table is 40°-190°. The bending head with a single table structure (only having the first bending table) needs to bend 190°, so the distance between the center point of the side notch of the first bending table and the center point of the discharge port of the fixed seat is not less than the distance between the center point of the side notch of the second bending table and the center point of the discharge port of the fixed seat.

[0059] For example, when the fixed bending structure only has the first bending table, both angles within 90 degrees and angles of 180° need to be bent, and the distance between the center point of the side notch of the first bending table and the center point of the discharge port of the fixed seat needs to be greater than or equal to 3.5 mm to realize bending of 180°, and the longer the distance is, the higher the height of the double arrow is, but cannot exceed the height of the tooth, otherwise the double arrow will affect the occlusion when worn in the oral cavity of the patient, and the smoothness of the U-shaped arc that is bent is worse. Since the height of the first molar is usually 5-8 mm, and the diameter of the steel wire is 0.8 mm, when the distance between the center point of the side notch of the first bending table and the center point of the discharge port of the fixed seat is set to 3.5 mm, the height of the bent arrow is 3.5 mm+0.8 mm=4.3 mm, which is less than the lowest 5 mm of the first molar.

[0060] Please refer to Figure 10 and Figure 10-1 , which are horizontal cross-sectional top views of the center point of the steel wire, the steel wire 00 passes through the steel wire channel of the fixed seat, and the shortest distance between the inner wall of the steel wire channel and the outer side of the fixed seat can be 0.2 mm. If a slope is dug on the outer side of the side notch to form a new outer side 613, so that the shortest distance between the inner wall of the steel wire channel and the side notch surface is 0.2 mm, 0.2 mm is the limit distance of the thickness of the inner wall of the steel wire channel to the outer side, at this time the steel wire can be bent to 191°, and the formula is as follows:

[0061] tanA=0.8 / 4=0.2 A=arctan0.2≈11 180°+11°=191°

[0062] Therefore, the maximum bending angle of the fixed bending structure in the present application is 190°.

[0063] Please refer to Figure 11 and Figure 11-1The calibration structure comprises a side inclined surface 501, an upper side surface 502, a lower side surface 503, an inner arc surface 504, an upper notch 505 and a lower notch 506, and is used for calibrating the position of the bending head and the head of the fixing seat, so that the center lines of the two coincide; the calibration structure is slowly pushed along the horizontal direction from the bending head to the head of the fixing seat, the outer inclined surface of the head of the fixing seat is attached to the side inclined surface of the calibration structure, when the inner part of the calibration structure is completely fitted with the bending head and the head of the fixing seat, the position of the origin sensor of the bending rod is adjusted from non-light to light, and is fixed by a screw, so that the hardware origin position of the bending rod is set, and the calibration is completed.

[0064] Referring to Figure 12 The double-arrow bending device bends the double-arrow clamp from both ends, and the specific bending sequence is as follows:

[0065] First, the distolingual vertical foot segment 021 is bent, followed by a distolingual vertical segment 022, a distolingual horizontal segment 023, a distobuccal horizontal segment 024, a distobuccal vertical segment 025, a distal arrow distal segment 026, a distal arrow proximal segment 027, a horizontal segment 028, a proximal arrow distal segment 029, a proximal arrow proximal segment 030, a proximal buccal vertical segment 031, a proximal buccal horizontal segment 032, a proximal lingual horizontal segment 033, a proximal lingual vertical segment 034, and finally a proximal lingual vertical foot segment 035.

[0066] In summary, the double-arrow bending device with a horizontal fixing seat is an improvement and upgrade of the existing bending machine on the market, which automatically transports the steel wire through the steel wire conveying structure, and sets the steel wire fixing structure to cooperate with the steel wire bending mechanism to bend the steel wire according to the bending parameters contained in the preset program, effectively solving the problem of high bending difficulty and low efficiency of existing steel wire bending by manual bending. In addition, it also has high processing precision and processing stability, avoiding the problems of operation error or unsatisfactory bending effect that are prone to occur in manual bending.

[0067] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment are appropriately combined to form other embodiments understood by those skilled in the art.

Claims

1. A double-arrow bending device with a horizontal fixed base, characterized in that, include: Support structure, rotary conveying structure, straightening structure, up-and-down sliding structure, rotary power structure, calibration structure, fixed bending structure, bending rod, cutter; The support structure consists of an upper plate, a lower plate, a rear plate, and left and right side plates, which are at 90° to each other. The left and right tie rods are located on the left and right sides of the bending head structure, connecting the upper plate and the lower plate, and playing the role of protecting and fixing the rotating power structure. The fixed bending structure includes a fixed seat, a fixed seat bracket, and a bending head. The fixed seat is horizontally mounted on the upper plate and connected to the fixed seat bracket through a U-shaped mounting hole. A rectangular block at the bottom of the fixed seat is embedded in the fixed seat bracket. The fixed seat bracket is fixed to the upper plate through positioning pins and screw holes. The bending head is connected to the bending rod through positioning pins and screw holes. The rotation center point of the bending head is located on the center line of the wire channel of the fixed seat. The front-to-back distance between the rotation center point of the bending head and the center point of the discharge port of the fixed seat does not exceed 2mm. The outer side of the bending head forms an angle of 180° to 190° with the wire channel. The shortest distance between the inner wall of the wire channel and the outer side is 0.2 to 1.5mm. The rotary power structure includes a geared motor connected to a bending rod via a coupling. The bending rod is mounted on a pair of ball screw mounting seats with angular contact bearings. The calibration structure consists of a side inclined surface, an upper side surface, a lower side surface, an inner arc surface, an upper recess, and a lower recess. The side inclined surface of the calibration structure engages with the side inclined surface of the mounting seat, the upper side surface engages with the side of the bending head, and the inner arc surface engages with the bending rod. The rotary conveying structure has a multi-layer telescopic sleeve between the three-lobed spring chuck and the mounting seat. The multi-layer telescopic sleeve has an inner diameter of 1 mm and an outer diameter of 5 mm. The straightening structure includes a straightener mounted on a hollow rotary shaft. The sliding structure is used to adjust three vertical heights. The first vertical height is when the center point of the notch on the side of the first bending table is aligned with the center point of the steel wire; the second vertical height is when the center point of the notch on the side of the second bending table is aligned with the center point of the steel wire; and the third vertical height is when the cutting edge is higher than the highest point of the steel wire. The second bending tables on the left and right sides of the bending head are symmetrically distributed on the left and right sides of the first bending table. The upper surface diameter of the first and second bending tables is 1-3mm. The distance between the upper surface of the first and second bending tables is 1-8mm. The distance between the upper surface of the first bending table and the lower surface of the bending head is 10-20mm. The distance between the center point of the notch on the side of the first bending table and the center point of the discharge port of the fixed seat is 1-5mm. The distance between the center point of the notch on the side of the second bending table and the center point of the discharge port of the fixed seat is 2.5-6mm.

2. The double-arrow bending device as described in claim 1, characterized in that, The fixed base consists of a wire channel, a discharge port, an outer side surface, an outer inclined surface, an upper concave surface, a rear concave surface, a lower concave surface, a lower concave surface body, an upper end face of the discharge port, a lower end face of the discharge port, a side end face of the discharge port, an upper end face body, and a lower end face body. The outer side surface, the upper concave surface, the rear concave surface, and the lower concave surface form a side recess located on the side of the fixed base. The bending head consists of a first bending platform, a second bending platform, a lower recess of the bending head, a middle recess of the bending head, a rear inclined surface of the first bending platform, a slope of the bending head, a side inclined surface of the bending head, a side surface of the bending head, a positioning pin hole, a fixing screw hole of the bending head, a cutter mounting groove, and a fixing screw hole of the cutter.

3. The double-arrow bending device as described in claim 1, characterized in that, The fixed seat has a concave surface with a notch in the concave body, while the bending head does not have a concave opening. The fixed seat is composed of a wire channel, a discharge port, an outer side surface, an outer inclined surface, an upper concave surface, a lower concave surface, a notch in the lower concave body, a rear concave surface, an upper end surface of the discharge port, a lower end surface of the discharge port, a side end surface of the discharge port, an upper end surface, and a lower end surface. The outer side surface, the upper concave surface, the rear concave surface, and the lower concave surface form a side concave opening located on the side of the fixed seat. The bending head is composed of a first bending platform, a second bending platform, a central concave opening in the bending head, a rear inclined surface of the first bending platform, a slope of the bending head, a side inclined surface of the bending head, a side surface of the bending head, a positioning pin hole, a fixing screw hole of the bending head, a cutter mounting groove, and a fixing screw hole of the cutter.

4. The double-arrow bending device as described in claim 1, characterized in that, The fixed seat does not have a concave surface or a concave surface body, and the bending head does not have a concave opening. The fixed seat is composed of a wire channel, a discharge port, an outer side surface, an outer inclined surface, an upper concave surface, a rear concave surface, an upper end face of the discharge port, a side end face of the discharge port, and an upper end face body. The outer side surface, the upper concave surface, and the rear concave surface form a side concave opening located on the side of the fixed seat. The bending head is composed of a first bending platform, a second bending platform, a central concave opening of the bending head, a rear inclined surface of the first bending platform, a slope of the bending head, a side inclined surface of the bending head, a side surface of the bending head, a positioning pin hole, a fixing screw hole of the bending head, a cutter mounting groove, and a fixing screw hole of the cutter.

5. The double-arrow bending device as described in claim 1, characterized in that, The fixed seat does not have a concave surface or a concave surface body. The bending head only has a first bending platform and does not have a second bending platform, a concave opening of the bending platform, or a concave opening in the middle of the bending head. The fixed seat is composed of a wire channel, a discharge port, an outer side surface, an outer inclined surface, an upper concave surface, a rear concave surface, an upper end face of the discharge port, a lower end face of the discharge port, a side end face of the discharge port, an upper end face body, and a lower end face body. The bending head is composed of a first bending platform, a rear inclined surface of the first bending platform, a bending head ramp, a side inclined surface of the bending head, a side surface of the bending head, a positioning pin hole, a bending head fixing screw hole, a cutter mounting groove, and a cutter fixing screw hole.

6. The double-arrow bending device as described in claim 1, characterized in that, The fixed base does not have a lower end face of the discharge port and a lower end face body. The bending head only has a first bending platform and does not have a second bending platform, a middle recess of the bending head, or a lower recess of the bending platform. The fixed base is composed of a wire channel, a discharge port, an outer side surface, an outer inclined surface, an upper concave surface, a rear concave surface, an upper end face of the discharge port, a side end face of the discharge port, and an upper end face body. The bending head is composed of a first bending platform, a rear inclined surface of the first bending platform, a side surface of the bending head, a slope of the bending head, a side inclined surface of the bending head, a positioning pin hole, a fixing screw hole of the bending head, a cutter mounting groove, and a fixing screw hole of the cutter.

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