CN109396294B

CN109396294B - Arch wire bending method

Info

Publication number: CN109396294B
Application number: CN201811588014.4A
Authority: CN
Inventors: 李祖安; 王红卫; 陈启兴; 谢卓; 彭余旺
Original assignee: Guangzhou Riton Biomaterial Co Ltd
Current assignee: Guangzhou Riton Biomaterial Co Ltd
Priority date: 2018-12-24
Filing date: 2018-12-24
Publication date: 2020-12-04
Anticipated expiration: 2038-12-24
Also published as: CN109396294A

Abstract

The invention relates to the technical field of tooth orthodontics, and discloses an arch wire bending method, which comprises the following steps: step 1: leading a design shape chart or design curve data of an arch wire into a cutting machine, and cutting a groove on a thin plate by using the cutting machine according to the design shape chart or the design curve data, wherein the shape of the groove is consistent with the design shape of the arch wire; step 2: clamping the arch wire to be bent into the groove; and step 3: pressing at least one first pressing plate above the thin plate; and 4, step 4: placing the first pressing plate and the thin plate in heating equipment for heating and heat preservation, and taking the first pressing plate and the thin plate out of the heating equipment after the arch wire is shaped; and 5: and the first pressing plate is taken down from the thin plate, the arch wire is taken out from the groove, and the surface treatment is carried out on the arch wire. The arch wire bending method provided by the invention is simple to operate, high in bending precision and low in cost.

Description

Arch wire bending method

Technical Field

The invention relates to the technical field of tooth orthodontics, in particular to an arch wire bending method.

Background

Orthodontic correction is used for cosmetic and plastic purposes by more and more beauty-conscious people, no longer solely for the health needs. The orthotics are of various types, but no matter the orthotics are digital labial orthodontic appliances or lingual orthodontic appliances, because the optimal dental arch form and teeth of each patient are different, an individual arch wire needs to be bent according to the conditions of different patients in the process of correction, and the optimal orthodontic effect can be achieved. Various data expressed by the arch wire are important for the whole correcting effect, so that the bending precision of the individual arch wire is an important factor for the success of correcting.

The existing common arch wire bending method is formed by bending by a skilled technician or by adopting a manipulator. The manual bending has the defects of high difficulty, long time consumption and incapability of mass production. If the mechanical arm is used for bending, the mechanical arm equipment is expensive, the early investment is large, the technology is immature, the mechanical arm can only bend steel wires with small rebound quantity such as stainless steel at present, and the mechanical arm is difficult to accurately bend arch wires with high rebound resilience such as nickel-titanium wires and beta-titanium wires. In addition, in the process of bending the arch wire, the manipulator is easy to strain the arch wire to cause damage to the internal organization of the metal, so that the arch wire is easy to break in the process of correcting, and for the arch with higher requirement on smoothness, the manipulator is difficult to successfully bend at present.

Disclosure of Invention

The invention aims to provide an arch wire bending method which is high in bending precision, simple to operate and low in cost.

In order to achieve the above object, an embodiment of the present invention provides an arch wire bending method, including the following steps:

step 1: leading a design shape chart or design curve data of an arch wire into a cutting machine, and cutting a groove on a thin plate by using the cutting machine according to the design shape chart or the design curve data, wherein the shape of the groove is consistent with the design shape of the arch wire;

step 2: clamping the arch wire to be bent into the groove;

and step 3: pressing at least one first pressing plate above the thin plate;

and 4, step 4: placing the first pressing plate and the thin plate in heating equipment for heating and heat preservation, and taking the first pressing plate and the thin plate out of the heating equipment after the arch wire is shaped;

and 5: and the first pressing plate is taken down from the thin plate, the arch wire is taken out from the groove, and the surface treatment is carried out on the arch wire.

Preferably, in step 3, at least one second pressing plate is placed at the bottom of the thin plate, and the positions of the first pressing plate, the thin plate and the second pressing plate are fixed by using a locking device, so that the first pressing plate and the second pressing plate lock the thin plate;

and 4, placing the second pressing plate together with the first pressing plate and the thin plate in heating equipment for heating and heat preservation, and taking the first pressing plate, the second pressing plate and the thin plate out of the heating equipment after the arch wire is shaped.

According to a preferable scheme, at least two first through holes are uniformly distributed in the first pressing plate, at least two second through holes are uniformly distributed in the thin plate, at least two third through holes are uniformly distributed in the second pressing plate, the positions of the first through holes, the second through holes and the third through holes correspond to one another, the locking device comprises at least two positioning pieces and at least two limiting parts, and when an arch wire is bent, the positioning pieces penetrate through the first through holes, the second through holes and the third through holes and the limiting parts to be tightly matched, so that the first pressing plate and the second pressing plate are pressed on the thin plate.

Preferably, the positioning element is a bolt, the limiting part is a nut, when the arch wire is bent, the bolt sequentially penetrates through the third through hole, the second through hole and the first through hole to be in threaded connection with the nut, and a gasket is arranged between the nut and the first pressing plate.

Preferably, in step 1, the cutting machine cuts the grooves on the thin plate by using a laser cutting or milling or wire cutting process.

Preferably, in step 5, the surface treatment is electrophoresis or acid washing.

Preferably, the thickness of the sheet is no more than 30% of the diameter of the archwire.

Preferably, the material of the thin plate is a metal having a melting point of 1000 ℃ or higher.

Preferably, the grooves are rounded.

Preferably, the number of the grooves is more than one.

To sum up, the arch wire bending method provided by the embodiment of the invention utilizes the cutting machine to accurately cut the arch groove on the thin plate according to the designed shape graph or the designed curve data of the arch wire, the curvature shape of the groove has high similarity with the designed shape of the arch wire, the arch wire to be formed is put into the groove, and the arch wire is bent and formed by adopting a heat setting mode. And a plurality of grooves can be cut on the same thin plate, a plurality of arch wires can be bent at the same time, and the mass production of the arch wires is facilitated.

Drawings

Fig. 1 is an exploded view of a tool used in an archwire bending process provided by an embodiment of the present invention;

fig. 2 is a schematic view of arch wire bending provided by an embodiment of the present invention.

Reference numerals:

1. the device comprises a thin plate, 11, a second through hole, 2, a groove, 3, a first pressing plate, 31, a first through hole, 4, a second pressing plate, 41, a third through hole, 5, a locking device, 51, a positioning piece, 52, a limiting part, 53 and a gasket.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "lateral", "upper", "lower", "bottom", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

As shown in fig. 1 to 2, the present invention provides an arch wire bending method, which comprises the following steps:

step 1: guiding the designed shape diagram or the designed curve data of the arch wire into a cutting machine, and cutting a groove 2 on the thin plate 1 by using the cutting machine according to the designed shape diagram or the designed curve data, wherein the shape of the groove 2 is consistent with the designed shape of the arch wire;

step 2: the arch wire to be bent is clamped into the groove 2;

and step 3: pressing at least one first press plate 3 above the sheet 1;

and 4, step 4: placing the first pressing plate 3 and the thin plate 1 in heating equipment for heating and heat preservation, and taking the first pressing plate 3 and the thin plate 1 out of the heating equipment after the arch wire is shaped;

and 5: the first presser plate 3 is removed from the sheet 1, the arch wire is taken out of the groove 2, and the surface treatment is performed to the arch wire.

Based on the technical scheme, the shape of the arch wire which is finally required to be bent is directly converted into a design shape graph or design curve data, the design shape graph or design curve data is led into a cutting machine, and the cutting machine is used for accurately cutting the thin plate 1, so that the bending precision of the arch wire is high. The arch wire to be bent is clamped into the groove 2, the first pressing plate 3 is pressed on the thin plate 1, the arch wire is ensured to be completely clamped in the groove 2, and meanwhile, the flatness of the arch wire in the pressing process is ensured. The first pressing plate 3 and the thin plate 1 are placed in a heating device to be heated, so that the arch wire to be bent is gradually shaped. Wherein, the heating equipment is a high-temperature furnace, and the high-temperature furnace is preferably a vacuum high-temperature furnace for preventing the excessive oxidation of the arch wire. The heating time of the heating device is determined by different arch wire materials: heating the stainless steel arch wire in a furnace for about 30min to 600 ℃, preserving heat for 60min, and naturally cooling; the heating time of the nickel-titanium arch wire is about 20min, the heating is carried out to 400 ℃, the heat preservation is carried out for 30min, and then the natural cooling is carried out. In this embodiment, the cutting machine is introduced with a designed shape of the archwire. In order to facilitate the placement and removal of the archwire, the width of the slot 2 should be greater than about 10% of the diameter of the archwire. After the arch wire is taken out of the groove 2, the surface of the arch wire needs to be treated, and an oxide layer outside the arch wire is removed, so that the corrosion resistance of the arch wire is higher. The arch wire bending method provided by the invention has the advantages of simple operation steps, less required equipment and lower manufacturing cost.

In step 3, at least one second pressing plate 4 is placed at the bottom of the thin plate 1, and the positions of the first pressing plate 3, the thin plate 1 and the second pressing plate 4 are fixed by using a locking device 5, so that the first pressing plate 3 and the second pressing plate 4 press the thin plate 1; and step 4, placing the second pressing plate 4 together with the first pressing plate 3 and the thin plate 1 in a heating device for heating and heat preservation, and taking the first pressing plate 3, the second pressing plate 4 and the thin plate 1 out of the heating device after the arch wire is shaped. The locking device 5 is adopted to firmly fix the first pressing plate 3 and the second pressing plate 4 on the upper surface and the lower surface of the thin plate 1, so that the thin plate 1 is favorably compressed, the flatness of the arch wire in the groove 2 is ensured, and the situation that the arch wire is tilted does not occur. In the embodiment, the thicknesses of the first pressing plate 3 and the second pressing plate 4 are both 5mm to 10mm, and the number of the first pressing plate 3 and the second pressing plate 4 is one.

Specifically, at least two first through holes 31 are uniformly distributed on the first pressing plate 3, at least two second through holes 11 are uniformly distributed on the thin plate 1, at least two third through holes 41 are uniformly distributed on the second pressing plate 4, the positions of each first through hole 31, each second through hole 11 and each third through hole 41 correspond to one another, the locking device 5 comprises at least two positioning pieces 51 and at least two limiting parts 52, and when an arch wire is bent, the positioning pieces 51 penetrate through the first through holes 31, the second through holes 11 and the third through holes 41 to be tightly matched with the limiting parts 52, so that the first pressing plate 3 and the second pressing plate 4 lock the thin plate 1. The number of the first through holes 31, the second through holes 11, the third through holes 41, the positioning members 51 and the limiting parts 52 is the same, the thin plate 1, the first pressing plate 3 and the second pressing plate 4 are all rectangular solids, and the cross sections of the three are the same, in other embodiments, the cross sections of the first pressing plate 3, the second pressing plate 4 and the thin plate 1 may also be circular or other shapes. When the number of the first through holes 31, the second through holes 11 and the third through holes 41 is two, the two first through holes 31 are symmetrically distributed on the first pressing plate 3, and the positions of the second through holes 11 and the third through holes 41 correspond to the positions of the first through holes 31 and are symmetrically distributed on the thin plate 1 and the second pressing plate 4 respectively. In this embodiment, the number of the first through holes 31, the second through holes 11, the third through holes 41, the positioning members 51 and the limiting parts 52 is four, the four first through holes 31 are distributed at four corners of the first pressing plate 3, similarly, the second through holes 11 and the third through holes 41 are also correspondingly distributed at four corners of the thin plate 1 and the second pressing plate 4, and the pressing plate is locked to the thin plate 1 in all directions through the fastening and matching of the positioning members 51 and the limiting parts 52. The positioning piece 51 is a bolt, the limiting part 52 is a nut, when the arch wire is bent, the bolt sequentially passes through the third through hole 41, the second through hole 11 and the first through hole 31 to be in threaded connection with the nut, and a gasket 53 is arranged between the nut and the first pressing plate 3. The positioning piece 51 is connected with the limiting part 52 through threads, so that the assembly and disassembly are convenient. The washer 53 may distribute the pressure of the nut against the platen, protecting the platen surface from scratching by the nut.

In particular, in step 1, the cutting machine cuts the grooves 2 on the thin plate 1 by using a laser cutting or milling or linear cutting process, and the three machining processes are relatively mature. In the present embodiment, the cutting machine employs a laser cutting technology, and correspondingly, the cutting machine may be a laser cutting machine.

Preferably, in step 5, the surface treatment is electrophoresis or acid washing. The electrophoresis homogeneity is good, and the oxide skin cleaning capability of acid washing is strong.

In addition, in order to further ensure the flatness of the arch wire, the thickness of the thin plate 1 is not more than 30% of the diameter of the arch wire. The material of the thin plate 1 is a metal with a melting point of 1000 ℃ or higher, and prevents the thin plate 1 from being deformed or melted during heating.

Furthermore, in order to conveniently place the arch wire and avoid the damage to the arch wire in the process of putting in or taking out, the groove 2 is subjected to rounding treatment. The number of the grooves 2 is more than one. A plurality of grooves 2 can be cut on one metal sheet 1, and a plurality of arch wires are processed and shaped at one time, so that the manufacturing cost is effectively reduced, and the batch production of the arch wires can be realized.

It should be understood that the terms "first", "second", "third", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An arch wire bending method is characterized in that: the method comprises the following steps:

step 2: clamping the arch wire to be bent into the groove;

and step 3: pressing at least one first pressing plate above the thin plate;

and 5: removing the first pressing plate from the thin plate, taking the arch wire out of the groove, and performing surface treatment on the arch wire;

wherein the thickness of the sheet is no more than 30% of the diameter of the archwire.

2. The archwire bending method of claim 1, wherein: in step 3, at least one second pressing plate is arranged at the bottom of the thin plate, and the positions of the first pressing plate, the thin plate and the second pressing plate are fixed by using a locking device, so that the first pressing plate and the second pressing plate press the thin plate;

3. The archwire bending method of claim 2, wherein: the utility model discloses a locking device, including first clamp plate, second clamp plate, locking device, first clamp plate, second clamp plate, first through-hole, second through-hole, locking device, first clamp plate, second clamp plate, the equipartition has two at least first through-holes, the equipartition has two at least second through-holes on the thin plate, the equipartition has two at least third through-holes on the second clamp plate, each the position one-to-one of first through-hole, second through-hole and third through-hole, locking device includes two at least setting elements and two at least spacing portions, when the curved system arch wire, the setting element passes first through-hole the second through-hole with the third through.

4. The archwire bending method of claim 3, wherein: the positioning piece is a bolt, the limiting part is a nut, when the arch wire is bent, the bolt sequentially penetrates through the third through hole, the second through hole and the first through hole to be in threaded connection with the nut, and a gasket is arranged between the nut and the first pressing plate.

5. The archwire bending method of claim 1, wherein: in step 1, the cutting machine cuts the grooves in the sheet by a process of laser cutting or milling or wire cutting.

6. The archwire bending method of claim 1, wherein: in step 5, the surface treatment is electrophoresis or acid washing.

7. The archwire bending method of claim 1, wherein: the thin plate is made of metal with a melting point of more than 1000 ℃.

8. The archwire bending method of claim 1, wherein: the grooves are rounded.

9. The archwire bending method of claim 8, wherein: the number of the grooves is more than one.