Automatic bending device for steel wire of orthodontic appliance

Abstract

The present invention discloses an automatic bending device for steel wire for orthodontic appliances, which relates to the technical field of steel wire processing, and includes: a main body; a slide, which is symmetrically arranged on the same side of the main body; a clamping component, which is arranged inside the slide, and is used to clamp the steel wire; a bending component, which is arranged on one side of the main body, and is used to bend the steel wire; a die, which is installed on one side of the bending component, and is used to adjust the curvature of the bending. The present invention sets the bending mode to multiple bending, and the bending process ensures that the curvature gradually increases from small to large until the target curvature required for bending is reached. The first screw is rotated to make the pressing rod movable, so that the end of the pressing rod can fit the required curve, and the curvature of the fitted curve is gradually increased with the number of bending times, thereby achieving the effect of increasing the bending rate with the number of bending times, and greatly improving the bending effect.

Description

Technical Field

[0001] The invention relates to the technical field of steel wire processing, and in particular to an automatic steel wire bending device for an orthodontic appliance. Background Art

[0002] A dental brace is a medical device used to correct teeth and bite problems. It is mainly used to adjust the position and arrangement of teeth, so that the teeth are arranged more neatly in the mouth, the bite is more accurate, and the oral aesthetics and function are improved. Traditional fixed braces (also called braces) usually have steel wires, which are used to support and apply pressure to help move teeth. In traditional metal braces, steel wires play a key role. Steel wires can connect braces and adjust the position of teeth by applying appropriate force, thereby achieving the effect of correcting teeth.

[0003] Bending the wire is a very important part of the production process of dental braces. It connects and supports the metal bracket, creates the correct tooth spacing and applies force. The bent wire can initially fit the human tooth layout. In the subsequent customization process, the dentist will also make necessary adjustments based on the patient's oral condition and the progress of correction. In the process of bending the wire, external force is usually used to force the wire to bend and deform, and finally maintain the bent state.

[0004] After searching, the Chinese patent document with publication number CN202199698U discloses a steel wire bending device that can perform multiple bends in a single press to perform steel wire bending operations. Although this patented technology can use the upper half mold and the side pressure block to perform vertical bending operations and horizontal bending operations on the workpiece, and can suppress multiple bends in a single operation, in the process of bending the orthodontic appliance steel wire, due to the inherent toughness of the steel wire itself, when it is bent to a predetermined curvature, it often rebounds under the action of its inherent elastic force. This rebound not only makes it difficult for the steel wire to accurately maintain the desired curvature or shape, but also greatly increases the difficulty and complexity of the operation. The operator often needs to over-bend to compensate for the rebound. In addition, based on the above operation, when a larger curvature is directly bent at one time during the bending process, the steel wire is likely to suffer local fatigue damage due to excessive stress concentration, reducing the overall strength and durability of the steel wire, thereby adversely affecting the overall effect and service life of the orthodontic appliance. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic bending device for steel wires for orthodontic appliances, so as to solve the problem that during the bending process of the steel wire, the arc of a single bending of the steel wire is too large, causing stress concentration in the steel wire and then local fatigue damage.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A wire automatic bending device for an orthodontic appliance comprises: a main body; a slide, the slide is symmetrically arranged on the same side of the main body; a clamping component, the clamping component is arranged inside the slide, and the clamping component is used to clamp the wire; a bending component, the bending component is arranged on one side of the main body, and the bending component is used to bend the wire; a die, the die is installed on one side of the bending component, and the die is used to adjust the curvature of the bending; the die comprises a lifting plate and a mounting plate, the mounting plate is fixedly connected to one side of the main body, and the lifting plate and the side close to the mounting plate are symmetrically rotatably connected with a plurality of first screws, the outer sides of the first screws are threadedly connected with a first slider, the first slider is slidably connected to the side wall of the main body, a pressure rod is fixedly connected to one side of the first slider, the first screws in the same axial direction correspond to each other and are connected at one end close to each other by a spline, and every two symmetrically arranged first screws are connected by belt and pulley transmission, and a plurality of first motors are fixedly installed at the bottom of the mounting plate, and the output ends of the first motors extend to the other side of the mounting plate and are fixedly connected to the first screws.

[0008] A controller is arranged on one side of the main body to control the operation of each device.

[0009] By adopting the above technical solution, the bending mode is set to multiple bendings, and the bending process ensures that the curvature gradually increases from small to large until the target curvature required for bending is reached. The movement controlled by the first screw rod is used. Since the first screw rods on the upper and lower molds are connected by splines, the symmetrical first screw rods in the same mold are connected by belts and pulleys. Therefore, a single first motor can simultaneously drive the four first screw rods to rotate, so that the end of the pressure rod can fit the required curve. The curvature of the fitted curve is controlled to gradually increase with the number of bending times, thereby achieving the effect of increasing the bending rate with the number of bending times.

[0010] A further improvement of the technical solution of the present invention is that the bending component includes a hydraulic cylinder, which is fixedly installed on the top of the main body, and the top of the lifting plate is fixedly connected to a connecting frame, which is fixedly connected to the movable end of the hydraulic cylinder, and the end of the pressure rod away from the first slider is rotatably connected to a roller, and the roller is a pulley-like structure.

[0011] By adopting the above technical scheme, the connecting frame is pushed to move by controlling the operation of the hydraulic cylinder, thereby driving the lifting plate to move, and making the structure installed on the lifting plate (the upper mold as a whole) move, and cooperating with the lower mold (the mounting plate and the structure installed thereon) to achieve the bending of the steel wire. The bending shape is adapted to the shape fitted by the ends of each pressure rod (pulley position), and by setting a roller as the contact part with the steel wire, on the one hand, it can adapt to the axial creeping of the steel wire when bending down, and on the other hand, it can make the contact smoother.

[0012] A further improvement of the technical solution of the present invention is that the clamping component includes a positioning cylinder, the inner wall of the positioning cylinder is provided with four sliding grooves, a positioning block is slidably connected between the inner walls of the sliding grooves, a connecting groove is provided on one side of the positioning block, and transmission grooves connected to the inside of the connecting grooves are symmetrically provided on the opposite sides of the positioning block. An annular groove is provided inside the positioning cylinder, a gasket is slidably connected between the inner walls of the annular groove, a spring is also provided inside the annular groove, four sliding rods are slidably connected to one side of the positioning cylinder, one end of the sliding rod passes through the sliding groove and extends to the inside of the annular groove and is fixedly connected to the gasket, a transmission rod is fixedly connected to the outside of the sliding rod and located inside the sliding groove, the transmission rod is slidably connected to the transmission groove, and an operating ring is fixedly connected between the ends of the sliding rod away from the gasket.

[0013] By adopting the above technical solution, the operating circle is pressed to make the slide rod move, which drives the transmission rod to squeeze the transmission groove, so that each positioning block moves toward the side away from each other and leaves the center position of the positioning cylinder. After the steel wire passes through the positioning cylinder, the operating circle is released, so that the gasket is reset under the action of the spring, and the slide rod and the operating circle are reset. Furthermore, the transmission rod will squeeze the transmission groove in the opposite direction to the above direction, and then each positioning block will move to the side close to each other, pressing against the steel wire, and the fixation is completed.

[0014] A further improvement of the technical solution of the present invention is that: track grooves are provided on both sides of the inner wall of the slide, a slide is slidably connected between the inner walls of the track grooves, one side of the slide is hinged to the positioning cylinder, a flip groove is provided at the bottom of the slide, and operating grooves are symmetrically provided on both sides of the slide; a reset shell is fixedly connected to one side of the slide, a winding disk is rotatably connected to the central position between the inner walls of the reset shell, a pull rope is wrapped around the outer side of the winding disk, one end of the pull rope is fixedly connected to the winding disk and the other end is fixedly connected to the slide, a motor is fixedly connected to the outer side of the reset shell, and the output end of the motor extends to the interior of the reset shell and is fixedly connected to the central axis of the winding disk.

[0015] By adopting the above technical solution, the positioning cylinder is set to be hinged with the slide. When the slide is in a relatively distant position (before bending), the positioning cylinder will not flip over under the limit at the bottom of the slide, and is therefore in a horizontal state. During the bending process, the positioning cylinder moves to the position of the flip groove and flips downward, so that the angle is adjusted to adapt to the bending. After the steel wire is bent, the motor drives the winding drum to rotate to wind up the pull rope, and at the same time drives the positioning cylinder to move to the side away from it.

[0016] A further improvement of the technical solution of the present invention is that two adjustment grooves are symmetrically opened on one side of the main body, and second screws are rotatably connected between the inner walls of the adjustment grooves, and the two second screws have opposite thread directions and one end close to each other is fixedly connected to a rotating shaft, one end of one of the second screws extends to the outside of the main body and is fixedly connected to a rotating handle, and the outside of the second screw is threadedly connected to a second slider, the second slider is slidably connected to the adjustment groove, one side of the second slider is fixedly connected to a mounting block, and the slide is fixedly connected to the bottom of the mounting block; scales are provided on one side of the main body and at the positions where the two adjustment grooves are located.

[0017] By adopting the above technical solution, the handle is rotated according to the required length of the steel wire, so that the two second screws rotate synchronously, thereby driving the two second sliders to slide, and the slide and the mounting block move accordingly to adjust the spacing. There is a scale on one side of the main body, and the operator can judge the spacing according to the scale. The spacing at the farthest ends of the two positioning cylinders is the required length of the steel wire.

[0018] A further improvement of the technical solution of the present invention is that: a guide rod is fixedly connected between both sides of the inner wall of the slide, a push block is slidably connected to the outer side of the guide rod, one side of the push block extends to the outer side of the slide and is slidably connected to the slide, and the other side of the push block is fixedly connected to the cutting knife. An oblique groove is provided on the side wall of the push block, an electric push rod is fixedly connected to the top of the mounting block, the output end of the electric push rod extends to the bottom of the mounting block and is fixedly connected to a transmission frame, and the transmission frame is slidably connected to the oblique groove.

[0019] By adopting the above technical solution, after the steel wire is placed, the electric push rod is controlled to extend, driving the transmission frame to move downward, squeezing the inclined groove, so that the push block moves to the side close to the slide, and then drives the slide plate and the cutting knife to move, so that the cutting knife cuts off the protruding parts at both ends of the steel wire, and the remaining length of the steel wire is the required length of the steel wire.

[0020] A further improvement of the technical solution of the present invention is that: a mounting frame is fixedly connected to one side of the main body, a hollow rod is rotatably connected to the inner side of the mounting frame, both ends of the hollow rod extend to both sides of the mounting frame respectively, both ends of the hollow rod are rotatably connected to a rotating head, one end of the two rotating heads that is close to each other and located at the center of the central axis is fixedly connected with a linkage shaft, the rotating head and the outer side of the hollow rod are symmetrically fixedly connected with a support rod, the other end of the support rod is fixedly connected with a heating cylinder, and the convex surface of the heating cylinder is fixedly installed with a heating wire.

[0021] By adopting the above technical solution, the heating wire is controlled to work, and the heating tube is used to transfer heat to the steel wire until the steel wire turns red, so that the steel wire becomes softer, its plasticity is improved, and the rebound phenomenon during the bending process is reduced.

[0022] A further improvement of the technical solution of the present invention is that: a hollow rod and the outer side of the rotating head are fixedly connected with a gear ring, a fixed plate is fixedly connected to one side of the mounting frame, a sliding column is slidably connected to the top of the fixed plate, the bottom end of the sliding column extends to the bottom of the fixed plate, and both ends of the sliding column are fixedly connected with a linkage frame, one of the linkage frames is fixedly connected with two racks, the two racks correspond to the two gear rings one by one and are meshed, a second motor is fixedly connected to one side of the mounting frame, and the output end of the second motor is fixedly connected to the central axis of the rotating head.

[0023] By adopting the above technical solution, the second motor is controlled to rotate, so that the rotating head rotates, and at the same time, the heating tube located below is driven to flip over to fit the steel wire. During the rotation of the above rotating head, the rack and the linkage frame are driven upward through the gear ring transmission, and then the two gear rings are engaged to rotate in the opposite direction, and the two heating tubes are flipped over to fit the steel wire. When bending, the second motor is controlled to rotate in the opposite direction to flip over the heating tube.

[0024] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0025] 1. The present invention provides an automatic bending device for a wire for an orthodontic appliance. The bending mode is set to multiple bendings, and the bending process ensures that the curvature gradually increases from small to large until the target curvature required for bending is reached. The first screw is rotated to make the pressure rod movable, so that the end of the pressure rod can fit the required curve. The curvature of the fitted curve is controlled to gradually increase with the number of bendings, thereby achieving the effect of increasing the bending rate with the number of bendings, and greatly improving the bending effect.

[0026] 2. The present invention bends the steel wire by setting a pressing die with adjustable curvature, and the bending shape is adapted to the shape fitted into by the ends of each pressing rod, and by setting a roller as the contact part with the steel wire, on the one hand, it can adapt to the axial creeping of the steel wire when bending down, and on the other hand, it can make the contact smoother; in addition, the roller is set as a pulley-like structure with a groove in the central part, and the creeping and bending of the steel wire both occur in the groove part, and thus will not deviate to both sides.

[0027] 3. The present invention provides a positioning cylinder that can be flipped during the approach process. When the slide is in a relatively far position (before bending), the positioning cylinder will not flip due to the limit at the bottom of the slide, and is therefore in a horizontal state. During the bending process, the positioning cylinder moves to the position of the flip groove and flips downward, so that the angle is adjusted to adapt to the bending.

[0028] 4. The present invention sets a slide with adjustable spacing. In actual operation, the handle can be rotated according to the required length of the steel wire, so that the two second screws rotate synchronously, thereby driving the two second sliders to slide, and the slide and the mounting block move accordingly to adjust the spacing. One side of the main body is scaled, and the operator can judge the spacing according to the scale. The spacing at the farthest ends of the two positioning cylinders is the required steel wire length. After the steel wire is fixed and straightened, it can be trimmed to quickly obtain the required length of the steel wire.

[0029] 5. The present invention heats the steel wire by arranging a heating wire, and uses a heating tube to transfer heat to the steel wire until the steel wire turns red, so that the steel wire becomes softer, improves its plasticity, reduces the rebound phenomenon during the bending process, and thus improves the bending effect of the steel wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the steel wire of the present invention in an unbent state;

[0033] Figure 3 It is a structural schematic diagram of the steel wire bending process of the present invention;

[0034] Figure 4 This is a schematic diagram of the internal structure of the steel wire of the present invention when it is not bent;

[0035] Figure 5 It is a schematic diagram of the internal structure of the slide and the reset shell of the present invention;

[0036] Figure 6 It is a schematic diagram of the installation structure of the push block part of the present invention;

[0037] Figure 7 It is a schematic diagram of the installation structure of the installation frame of the present invention;

[0038] Figure 8 It is a schematic diagram of the installation structure of the gear ring and the rack of the present invention;

[0039] Fig. 9 It is a structural schematic diagram of the clamping component of the present invention;

[0040] Fig.10 For the present invention Figure 3 Enlarged view of point A in the middle;

[0041] Fig.11 For the present invention Figure 4 Enlarged view of point B in the middle.

[0042] In the figure: 1, main body; 2, hydraulic cylinder; 3, lifting plate; 4, connecting frame; 5, first screw rod; 6, first slider; 7, pressure rod; 8, roller; 9, adjustment groove; 10, second screw rod; 11, second slider; 12, mounting plate; 13, slide; 14, track groove; 15, slide; 16, positioning cylinder; 17, slide groove; 18, positioning block; 19, slide rod; 20, transmission groove; 21, transmission rod; 22, ring groove; 23, spring; 24, washer; 25. Mounting block; 26. First motor; 27. Motor; 28. Winding reel; 29. ​​Reset shell; 30. Operating slot; 31. Turning slot; 32. Electric push rod; 33. Transmission frame; 34. Guide rod; 35. Push block; 36. Inclined slot; 37. Operating ring; 38. Mounting frame; 39. Second motor; 40. Hollow rod; 41. Rotating head; 42. Gear ring; 43. Linkage shaft; 44. Support rod; 45. Heating tube; 46. Rack; 47. Linkage frame. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below in conjunction with embodiments:

[0044] Example 1

[0045] like Figure 1-Figure 3 As shown, the present invention provides an automatic bending device for steel wire for orthodontic appliances, comprising: a main body 1; a carriage 13, the carriage 13 is symmetrically arranged on the same side of the main body 1; a clamping component, the clamping component is arranged inside the carriage 13, and the clamping component is used to clamp the steel wire; a bending component, the bending component is arranged on one side of the main body 1, and the bending component is used to bend the steel wire; a die, the die is installed on one side of the bending component, and the die is used to adjust the curvature of the bending; the die comprises a lifting plate 3 and a mounting plate 12, the mounting plate 12 is fixedly connected to one side of the main body 1, and the lifting plate 3 and the mounting plate 12 are connected A plurality of first screw rods 5 are symmetrically rotatably connected to the adjacent side, a first slider 6 is threadedly connected to the outer side of the first screw rod 5, the first slider 6 is slidably connected to the side wall of the main body 1, a pressure rod 7 is fixedly connected to one side of the first slider 6, the first screw rods 5 in the same axial direction correspond to each other and the adjacent ends are connected by splines, every two symmetrically arranged first screw rods 5 are connected by belt and pulley transmission, a plurality of first motors 26 are fixedly installed on the bottom of the mounting plate 12, and the output ends of the first motors 26 extend to the other side of the mounting plate 12 and are fixedly connected to the first screw 5.

[0046] A controller is provided on one side of the main body 1 to facilitate the control of various devices to work.

[0047] In this embodiment, by setting the bending mode to multiple bending, and ensuring that the curvature gradually increases from small to large during the bending process until the target curvature required for bending is reached, the movement controlled by the first screw 5 is used. Since the pressure rods 7 on the upper and lower molds are connected by splines, the symmetrical first screws 5 in the same mold are connected by belts and pulleys. Therefore, the four first screws 5 can be driven to rotate at the same time by a single first motor 26, so that the end of the pressure rod 7 can fit the required curve. The curvature of the fitted curve is gradually increased with the number of bending times, thereby achieving the effect of increasing the bending rate with the number of bending times, which greatly improves the bending effect.

[0048] like Figure 3 and Figure 4 As shown, preferably, the bending component includes a hydraulic cylinder 2, which is fixedly installed on the top of the main body 1, and the top of the lifting plate 3 is fixedly connected to a connecting frame 4, which is fixedly connected to the movable end of the hydraulic cylinder 2, and the end of the pressure rod 7 away from the first slider 6 is rotatably connected to a roller 8, and the roller 8 is a pulley-like structure.

[0049] In this embodiment, the hydraulic cylinder 2 is controlled to work to push the connecting frame 4 to move, thereby driving the lifting plate 3 to move, and making the structure installed on the lifting plate 3 (the whole constituting the upper mold) move, and cooperating with the lower mold (the mounting plate 12 and the structure installed thereon) to achieve the bending of the steel wire. The bending shape is adapted to the shape fitted by the end of each pressure rod 7 (pulley position), and by setting the roller 8 as the contact part with the steel wire, on the one hand, it can adapt to the axial creep of the steel wire when bending down, and on the other hand, it can make the contact more smoothly; in addition, the roller 8 is set as a pulley-like structure with a groove in the central part, and the creep and bending of the steel wire both occur in the groove part, and thus it will not deviate to both sides.

[0050] like Figure 6 and Fig.11 As shown, preferably, the clamping component includes a positioning cylinder 16, the inner wall of the positioning cylinder 16 is provided with four sliding grooves 17, a positioning block 18 is slidably connected between the inner walls of the sliding grooves 17, a connecting groove is provided on one side of the positioning block 18, and transmission grooves 20 that communicate with the inside of the connecting groove are symmetrically provided on the opposite sides of the positioning block 18, an annular groove 22 is provided inside the positioning cylinder 16, a gasket 24 is slidably connected between the inner walls of the annular groove 22, a spring 23 is also provided inside the annular groove 22, four sliding rods 19 are slidably connected to one side of the positioning cylinder 16, one end of the sliding rod 19 passes through the sliding groove 17 and extends to the inside of the annular groove 22 and is fixedly connected to the gasket 24, a transmission rod 21 is fixedly connected to the outside of the sliding rod 19 and located inside the sliding groove 17, the transmission rod 21 is slidably connected to the transmission groove 20, and an operating ring 37 is fixedly connected between the ends of the sliding rod 19 away from the gasket 24.

[0051] In this embodiment, by pressing the operating ring 37, the slide bar 19 is moved, which on the one hand drives the transmission rod 21 to squeeze the transmission groove 20, so that each positioning block 18 moves toward the side away from each other and leaves the center position of the positioning tube 16, and on the other hand, the washer 24 squeezes the spring 23; after the above operation, the steel wire can pass through the positioning tube 16, and the operating ring 37 is released after the steel wire passes through the positioning tube 16, so that the washer 24 is reset under the action of the spring 23, and drives the slide bar 19 and the operating ring 37 to reset, and further, the transmission rod 21 will squeeze the transmission groove 20 in the opposite direction to the above, so that each positioning block 18 moves to the side close to each other, presses against the steel wire, and the steel wire is fixed after both ends of the steel wire are fixed by the positioning tube 16.

[0052] like Figure 5 and Fig.11 As shown, preferably, track grooves 14 are provided on both sides of the inner wall of the slide 13, a slide 15 is slidably connected between the inner walls of the track groove 14, one side of the slide 15 is hinged to the positioning cylinder 16, a flip groove 31 is provided at the bottom of the slide 13, and operation grooves 30 are symmetrically provided on both sides of the slide 13; a reset shell 29 is fixedly connected to one side of the slide 13, a winding disk 28 is rotatably connected to the central position between the inner walls of the reset shell 29, a pull rope is wound around the outer side of the winding disk 28, one end of the pull rope is fixedly connected to the winding disk 28 and the other end is fixedly connected to the slide 15, a motor 27 is fixedly connected to the outer side of the reset shell 29, and the output end of the motor 27 extends to the interior of the reset shell 29 and is fixedly connected to the central axis of the winding disk 28.

[0053] In the initial stage of bending, since the steel wire needs to be placed horizontally, the fixing direction of the steel wire needs to be kept horizontal. During bending, the fixing point needs to adapt to the changing angle of the bending. In addition, after each bending, the two positioning cylinders 16 move toward the side close to each other, which is not convenient for the next placement of the steel wire.

[0054] In this embodiment, by setting the positioning cylinder 16 to be hinged with the slide 15, when the slide 15 is in a relatively far position (before bending), the positioning cylinder 16 will not flip under the limit of the bottom of the slide 13, and is therefore in a horizontal state. During the bending process, the positioning cylinder 16 moves to the position of the flip groove 31 and flips downward, so that the angle is adapted to the bending for adjustment;

[0055] By providing the motor 27, after the steel wire is bent, the motor 27 drives the winding drum 28 to rotate, so as to wind up the draw rope, and at the same time drives the positioning cylinder 16 to move away from the side (until it contacts the push block 35).

[0056] Example 2

[0057] like Figure 3 and Figure 4As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, two adjusting grooves 9 are symmetrically opened on one side of the main body 1, and second screws 10 are rotatably connected between the inner walls of the adjusting grooves 9, and the two second screws 10 have opposite thread directions and one end close to each other is fixedly connected to a rotating shaft, one end of one of the second screws 10 extends to the outside of the main body 1 and is fixedly connected to a rotating handle, and the outside of the second screw 10 is threadedly connected to a second slider 11, the second slider 11 is slidably connected to the adjusting groove 9, one side of the second slider 11 is fixedly connected to a mounting block 25, and the slide 13 is fixedly connected to the bottom of the mounting block 25; scales are provided on one side of the main body 1 and at the positions where the two adjusting grooves 9 are located.

[0058] In this embodiment, the handle is rotated according to the required length of the steel wire, so that the two second screws 10 rotate synchronously, thereby driving the two second sliders 11 to slide, and the slide 13 and the mounting block 25 move accordingly to adjust the spacing. One side of the main body 1 is scaled, and the operator can judge the spacing based on the scale. The spacing at the farthest ends of the two positioning cylinders 16 is the required steel wire length.

[0059] Example 3

[0060] like Figure 5 and Figure 6 As shown, on the basis of Example 2, the present invention provides a technical solution: preferably, a guide rod 34 is fixedly connected between both sides of the inner wall of the slide 13, a push block 35 is slidably connected to the outer side of the guide rod 34, one side of the push block 35 extends to the outer side of the slide 13 and is slidably connected to the slide 13, and a cutting knife is fixedly connected to the other side of the push block 35. An inclined groove 36 is provided on the side wall of the push block 35, an electric push rod 32 is fixedly connected to the top of the mounting block 25, and the output end of the electric push rod 32 extends to the bottom of the mounting block 25 and is fixedly connected to a transmission frame 33, and the transmission frame 33 is slidably connected to the inclined groove 36.

[0061] In this embodiment, after the steel wire is placed, the electric push rod 32 is controlled to extend, driving the transmission frame 33 to move downward, squeezing the inclined groove 36, so that the push block 35 moves toward the side close to the slide 13, thereby driving the slide plate and the cutting knife to move. When the positioning cylinder 16 is at the farthest distance (at this time, the positioning cylinder 16 contacts the slide plate, and the slide plate limits the position of the positioning cylinder 16), at this time, one side of the cutting knife contacts one side of the positioning cylinder 16, so that during the movement of the above-mentioned cutting knife, the protruding parts at both ends of the steel wire will be cut off, so that the remaining length of the steel wire is the required steel wire length (the distance between the positioning cylinders 16 and one side). Through the above operation, the length of the steel wire is unified. At the same time, because the two positioning cylinders 16 are symmetrically arranged, the steel wire reaches the target length and is in a centered placement state.

[0062] Example 4

[0063] like Figure 7 and Figure 8 As shown, on the basis of Example 3, the present invention provides a technical solution: preferably, a mounting bracket 38 is fixedly connected to one side of the main body 1, a hollow rod 40 is rotatably connected between the inner sides of the mounting bracket 38, both ends of the hollow rod 40 extend to both sides of the mounting bracket 38 respectively, both ends of the hollow rod 40 are rotatably connected to a rotating head 41, a linkage shaft 43 is fixedly connected to one end of the two rotating heads 41 that is close to each other and located at the central position of the central axis, the rotating heads 41 and the outer sides of the hollow rod 40 are symmetrically fixedly connected with support rods 44, the other ends of the support rods 44 are fixedly connected with a heating tube 45, and the convex surface of the heating tube 45 is fixedly installed with a heating wire.

[0064] In this embodiment, the heating wire is controlled to heat, and the heating tube 45 is used to transfer heat to the steel wire until the steel wire turns red, so that the steel wire becomes softer, improves its plasticity, and reduces the rebound phenomenon during the bending process.

[0065] like Figure 7 and Figure 8 As shown, preferably, the hollow rod 40 and the outer side of the rotating head 41 are fixedly connected with a gear ring 42, one side of the mounting frame 38 is fixedly connected with a fixed plate, the top of the fixed plate is slidably connected with a sliding column, the bottom end of the sliding column extends to the bottom of the fixed plate, and both ends of the sliding column are fixedly connected with a linkage frame 47, one of the linkage frames 47 is fixedly connected with two racks 46, the two racks 46 correspond to the two gear rings 42 one by one and are meshed with each other, and one side of the mounting frame 38 is fixedly connected with a second motor 39, and the output end of the second motor 39 is fixedly connected to the central axis of the rotating head 41.

[0066] In this embodiment, the second motor 39 is controlled to operate so that the rotary head 41 rotates, and at the same time, the heating tube 45 located below is driven to flip over to fit the steel wire. During the rotation of the rotary head 41, the rack 46 and the linkage frame 47 are driven to move upward through the gear ring 42, and then the two gear rings 42 are engaged to rotate in the opposite direction, and the two heating tubes 45 are flipped over to fit the steel wire; by controlling the second motor 39 to operate (a temperature sensor is provided on the heating tube 45 to facilitate real-time monitoring of the heating temperature, and at the same time, the time required for heating to change can be determined through debugging before processing, and timing control can be performed), the two heating tubes 45 are flipped open to provide bending space.

[0067] The working principle of the automatic bending device and method for orthodontic wire will be described in detail below.

[0068] like Figure 1-Figure 11As shown, before operation, the required wire length is determined according to the size of the appliance, and the handle is rotated according to the required wire length, so that the two second screws 10 rotate synchronously, thereby driving the two second sliders 11 to slide, and the slide 13 and the mounting block 25 move accordingly to adjust the spacing (one side of the main body 1 is scaled, and the operator can judge the spacing according to the scale, and the spacing at the farthest ends of the two positioning cylinders 16 is the required wire length);

[0069] The motor 27 is controlled to provide torque to tighten the two positioning cylinders 16, which is convenient for operation on the one hand, and can be straightened after the steel wire is fixed on the other hand. The operating circle 37 is pressed to make the slide bar 19 move, which drives the transmission rod 21 to squeeze the transmission groove 20 on the one hand, so that each positioning block 18 moves toward the side away from each other and leaves the center position of the positioning cylinder 16, and the washer 24 squeezes the spring 23 on the other hand; after the above operation, the steel wire can pass through the positioning cylinder 16, and the operating circle 37 is released after the steel wire passes through the positioning cylinder 16, so that the washer 24 is reset under the action of the spring 23, and the slide bar 19 and the operating circle 37 are reset, and further, the transmission rod 21 will squeeze the transmission groove 20 in the opposite direction to the above, so that each positioning block 18 moves to the side close to each other, pressing the steel wire, and the steel wire is fixed by the positioning cylinder 16 at both ends.

[0070] The electric push rod 32 is controlled to extend, driving the transmission frame 33 to move downward, squeezing the inclined slot 36, so that the push block 35 moves toward the side close to the slide 13, thereby driving the slide plate and the cutting knife to move. When the positioning cylinder 16 is at the farthest distance (at this time, the positioning cylinder 16 contacts the slide plate, and the slide plate limits the position of the positioning cylinder 16), at this time, one side of the cutting knife contacts one side of the positioning cylinder 16, so that during the movement of the above-mentioned cutting knife, the protruding parts at both ends of the steel wire will be cut off, so that the remaining length of the steel wire is the required steel wire length (the distance between the positioning cylinders 16 and one side). Through the above operation, the uniformity of the steel wire length is completed. At the same time, because the two positioning cylinders 16 are symmetrically arranged, the steel wire reaches the target length and is placed in the center at the same time;

[0071] After the steel wire is positioned and centered, the second motor 39 is controlled to work, so that the rotating head 41 rotates, and at the same time, the heating cylinder 45 located below is turned over to fit with the steel wire. During the rotation of the rotating head 41, the gear ring 42 drives the rack 46 and the linkage frame 47 to move upward, and then the two gear rings 42 rotate in the opposite direction through meshing, and the two heating cylinders 45 are turned over to fit with the steel wire. Then the heating wire is controlled to heat, and the heating cylinder 45 is used to transfer heat to the steel wire until the steel wire turns red, and then the second motor 39 is controlled to work (a temperature sensor is provided on the heating cylinder 45 to facilitate real-time monitoring of the heating temperature. At the same time, before processing, the time required for heating to change can be determined through debugging, and timing control can be performed), so that the two heating cylinders 45 are turned over to provide bending space;

[0072] After completing the above operations, the bending operation can be started. During the bending process, the motor 27 is in an idle state and does not provide torque. The bending is implemented in multiple times, and the position of each pressure rod 7 is adjusted after each bending, so that the curvature of the curve fitted by the end of the pressure rod 7 gradually increases with the number of bending times. The specific operations are:

[0073] Control each first motor 26 to work, the first motor 26 closer to the center position rotates more times. Figure 4 In the case shown, the rotation numbers of the first motor 26 on the far left, the first motor 26 in the middle, and the first motor 26 on the far right in this view increase in sequence, and they stop working after rotating for several circles. Since the upper and lower groups of first screw rods 5 are connected by splines, the above operation will drive the first screw rods 5 to rotate a corresponding number of circles, so that each first slider 6 and pressure rod 7 moves downward by different distances. Among them, since the symmetrically arranged first screw rods 5 are connected by belt and pulley transmission, the moving distance of the pressure rod 7 is symmetrical on both sides. After the movement, the end of the pressure rod 7 is fitted into a curve. In actual application, the smoothness of the curve can be improved by appropriately increasing the logarithm of the pressure rod 7 and related structures.

[0074] After the curve fitting is completed, the hydraulic cylinder 2 is controlled to work, and the connecting frame 4 and the lifting plate 3 are pushed downward, thereby driving the first screw rod 5 and the pressure rod 7 located above to move downward as a whole. During the process, the splines between the first screw rods 5 slide against each other to provide activity space until the pressure rod 7 located above bends the steel wire into a fitted shape; a roller 8 is provided at the end of the pressure rod 7. During the above process, the roller 8 can match the curvature change of the steel wire during the bending process, and can also adapt to the creep of the steel wire in the axial direction;

[0075] During the bending process of the steel wire, the two ends of the steel wire will move toward the central position, thereby driving the positioning cylinder 16 to move toward the adjacent side. At this time, the motor 27 does not work, and its output shaft is in an idle state. The movement of the positioning cylinder 16 will drive the wire drum to unwind, releasing the suspension rope to provide space for movement.

[0076] After the above bending, the hydraulic cylinder 2 is controlled to be quickly retracted, so that the lifting plate 3 and the pressure rod 7 are reset as a whole. At this time, since the upper roller 8 is out of contact with the steel wire, the steel wire will partially rebound;

[0077] Then, through the same operation as above, the first motor 26 is controlled to work, so that the first two rotate, and the corresponding first slider 6 and the pressure rod 7 are driven downward, so that the ends of each pressure rod 7 can fit a curve with a larger curvature, and after the fitting is completed, the hydraulic cylinder 2 is repeatedly controlled to work and press down, so that the steel wire is bent twice and multiple times, and after each subsequent bending, the curvature that can be fitted to the end of the pressure rod 7 is increased until it is equal to the curvature of the arc that needs to be bent;

[0078] After reaching the curvature, the steel wire is cooled by an external cooling device, and then the pressure rod 7 is further moved by the screw control. The movement mode is the same as the above curvature adjustment process, but the movement amplitude is smaller, and only a small amount of overbending is provided. Since the bending is performed after cooling, the bending amplitude can rebound under the toughness of the steel wire, aiming to compensate for the small amount of rebound caused by the cooling process of the steel wire and the release after forming;

[0079] The fixation of the two ends of the steel wire is released by controlling the operating ring 37, and the upper pressing rod 7 is controlled to be separated from the lower pressing rod 7, and the bent steel wire is taken out.

[0080] Among them, the pressure rod 7 can be divided into two groups, the upper and lower groups, corresponding to the upper mold (lifting plate 3, the first screw rod 5 located at the top, the first slider 6, the mounting block 25, the pressure rod 7 and the roller 8) and the lower mold (mounting plate 12, the first screw rod 5 located at the bottom, the first slider 6, the mounting block 25, the pressure rod 7 and the roller 8), and there are two types of activities of each pressure rod 7: one is the activity controlled by the first screw rod 5. Since the pressure rods 7 on the upper and lower molds are connected by splines, the symmetrical first screw rods 5 in the same mold are connected by belt and pulley transmission, so the operation of a single first motor 26 will simultaneously drive four first motors 26 to move. A screw rod 5 rotates. This type of activity is intended to control the end of the pressure rod 7 to fit the required curve. The curvature is designed by performing a curvature simulation operation in advance and inputting it into the control program, that is, taking the target curvature to be completed as the target, and gradually approaching the target curvature from a straight line. This process is a synchronous adjustment of the upper and lower dies, and the curvature adjustment occurs after the die is reset upward; the second is to use the hydraulic cylinder 2 to push the connecting frame 4 to move, which will make the upper die move as a whole. This process is intended to press the adjusted upper die onto the lower die. During the process, only the upper die moves, and the lower die remains unchanged.

[0081] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An automatic bending device for steel wire for orthodontic appliances, characterized in that: include: A main body (1); a slide (13), wherein the slide (13) is symmetrically arranged on the same side of the main body (1); a clamping component, the clamping component being arranged inside the slide (13) and being used to clamp the steel wire; a bending component, the bending component being arranged on one side of the main body (1) and being used to bend the steel wire; A die, the die is mounted on one side of a bending component, and the die is used to adjust the curvature of the bending; the die comprises a lifting plate (3) and a mounting plate (12), the mounting plate (12) is fixedly connected to one side of a main body (1), a side of the lifting plate (3) close to the mounting plate (12) is symmetrically rotatably connected with a plurality of first screw rods (5), the outer sides of the first screw rods (5) are threadedly connected with a first slider (6), the first slider (6) is slidably connected to the side wall of the main body (1), a pressing rod (7) is fixedly connected to one side of the first slider (6), the first screw rods (5) in the same axial direction correspond to each other and are connected at one end by a spline, and every two symmetrically arranged first screw rods (5) are connected by belt and pulley transmission, and a plurality of first motors (26) are fixedly mounted on the bottom of the mounting plate (12), and the output ends of the first motors (26) extend to the other side of the mounting plate (12) and are fixedly connected to the first screw rods (5).

2. The automatic bending device for a steel wire for an orthodontic appliance according to claim 1, characterized in that: The bending component comprises a hydraulic cylinder (2), wherein the hydraulic cylinder (2) is fixedly mounted on the top of the main body (1), the top of the lifting plate (3) is fixedly connected to a connecting frame (4), the connecting frame (4) is fixedly connected to the movable end of the hydraulic cylinder (2), and the end of the pressure rod (7) away from the first sliding block (6) is rotatably connected to a roller (8), and the roller (8) is a pulley-like structure.

3. The automatic bending device for a steel wire for an orthodontic appliance according to claim 2, characterized in that: The clamping component comprises a positioning cylinder (16), the inner wall of the positioning cylinder (16) is provided with four slide grooves (17), the inner walls of the slide grooves (17) are slidably connected with a positioning block (18), one side of the positioning block (18) is provided with a connecting groove, and the two sides of the positioning block (18) are symmetrically provided with transmission grooves (20) which are connected with the inside of the connecting groove, the inside of the positioning cylinder (16) is provided with an annular groove (22), the inner walls of the annular groove (22) are slidably connected with a gasket (24), and the annular groove (22) is provided with a gasket (24) A spring (23) is also provided inside. Four slide bars (19) are slidably connected to one side of the positioning cylinder (16). One end of the slide bar (19) passes through the slide groove (17) and extends to the inside of the annular groove (22) and is fixedly connected to the washer (24). A transmission rod (21) is fixedly connected to the portion of the slide bar (19) located in the slide groove (17). The transmission rod (21) is slidably connected to the transmission groove (20). An operating ring (37) is fixedly connected between one end of the slide bar (19) away from the washer (24).

4. The automatic bending device for a steel wire for an orthodontic appliance according to claim 3, characterized in that: Track grooves (14) are provided on both sides of the inner wall of the slide (13); a slide (15) is slidably connected between the inner walls of the track groove (14); one side of the slide (15) is hinged to the positioning cylinder (16); a turning groove (31) is provided at the bottom of the slide (13); and operating grooves (30) are symmetrically provided on both sides of the slide (13); a reset shell (29) is fixedly connected to one side of the slide (13); a winding disk (28) is rotatably connected to the central position between the inner walls of the reset shell (29); a pull rope is wound around the outer side of the winding disk (28); one end of the pull rope is fixedly connected to the winding disk (28) and the other end is fixedly connected to the slide (15); a motor (27) is fixedly connected to the outer side of the reset shell (29); an output end of the motor (27) extends to the inside of the reset shell (29) and is fixedly connected to the central axis of the winding disk (28).

5. The automatic bending device for a steel wire for an orthodontic appliance according to claim 1, characterized in that: Two adjustment slots (9) are symmetrically provided on one side of the main body (1), and second screw rods (10) are rotatably connected between the inner walls of the adjustment slots (9). The two second screw rods (10) have opposite thread directions and are connected at one end thereof by a rotating shaft. One end of one of the second screw rods (10) extends to the outside of the main body (1) and is fixedly connected to a rotating handle. A second slider (11) is threadedly connected to the outside of the second screw rod (10), and the second slider (11) is slidably connected to the adjustment slots (9). A mounting block (25) is fixedly connected to one side of the second slider (11), and the slide frame (13) is fixedly connected to the bottom of the mounting block (25). A scale is provided on one side of the main body (1) and at the location of the two adjustment slots (9).

6. The automatic bending device for a steel wire for an orthodontic appliance according to claim 5, characterized in that: A guide rod (34) is fixedly connected between both sides of the inner wall of the slide (13); a push block (35) is slidably connected to the outer side of the guide rod (34); one side of the push block (35) extends to the outer side of the slide (13) and is slidably connected to the slide (13); a cutting knife is fixedly connected to the other side of the push block (35); an inclined groove (36) is provided on the side wall of the push block (35); an electric push rod (32) is fixedly connected to the top of the mounting block (25); an output end of the electric push rod (32) extends to the bottom of the mounting block (25) and is fixedly connected to a transmission frame (33); and the transmission frame (33) is slidably connected to the inclined groove (36).

7. The automatic bending device for a steel wire for an orthodontic appliance according to claim 1, characterized in that: A mounting frame (38) is fixedly connected to one side of the main body (1), a hollow rod (40) is rotatably connected to the inner side of the mounting frame (38), two ends of the hollow rod (40) respectively extend to two sides of the mounting frame (38), both ends of the hollow rod (40) are rotatably connected to a rotating head (41), a linkage shaft (43) is fixedly connected to one end of the two rotating heads (41) that is close to each other and located at the center of the central axis, the rotating heads (41) and the outer sides of the hollow rod (40) are symmetrically fixedly connected to support rods (44), the other ends of the support rods (44) are fixedly connected to a heating tube (45), and a heating wire is fixedly installed on the convex surface of the heating tube (45).

8. The automatic bending device for a steel wire for an orthodontic appliance according to claim 7, characterized in that: The hollow rod (40) and the outer sides of the rotating head (41) are both fixedly connected with a gear ring (42); one side of the mounting frame (38) is fixedly connected with a fixed plate; the top of the fixed plate is slidably connected with a sliding column; the bottom end of the sliding column extends to the bottom of the fixed plate; and both ends of the sliding column are fixedly connected with a linkage frame (47); one of the linkage frames (47) is fixedly connected with two racks (46); the two racks (46) correspond to the two gear rings (42) one by one and are meshingly connected; one side of the mounting frame (38) is fixedly connected with a second motor (39); the output end of the second motor (39) is fixedly connected with the central axis of the rotating head (41).

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