TWI568526B - Titanium alloy made of iron plate screw screw method and its dental plate structure - Google Patents

Description

Method for manufacturing iron die screw made of titanium alloy and tooth plate structure thereof

The invention relates to a method for manufacturing an iron die screw made of a titanium alloy and a tooth plate structure thereof, in particular to a method for forming a titanium alloy screw by means of tooth decay.

According to the fact, most of the conventional screws are made of iron-based materials for cold forging. Because the structure is made of iron-based materials, the strength is poor, the corrosion resistance is not good, and it is easy to oxidize and rust. After long-term driving with hand tools, Due to the torsion generated during the rotation, the end angles of the rotary holes may be deformed by wear. This phenomenon destroys the integrity of the rotary holes, which may cause slippage problems when the hand tool is driven, resulting in the screw being unable to be use.

Moreover, titanium alloy is a metal material with excellent mechanical properties, and has been widely used in various fields of industry in recent years. However, if a titanium alloy is applied to a creator of a screw, the titanium alloy is processed because of its unique material properties. The following difficulties are encountered; for example: 1. The poor thermal conductivity of the titanium alloy causes the high temperature generated during processing to be not easily transmitted to the outside of the tool, so that a large amount of heat is accumulated on the processing blade, and the sharp redness of the blade causes the red hardness of the blade to decrease. This causes the blade to soften and accelerate the wear of the tool. 2. The affinity of titanium alloy is large, it is easy to produce serious sticky knives during processing, and the friction between the blade and the workpiece increases the high temperature, which reduces the service life of the tool. 3. Titanium alloy The modulus of elasticity is small, and it is prone to large deformation, rebound, distortion and vibration during cutting, which causes the workpiece processing shape and precision error value to increase, and the surface roughness to increase; therefore, titanium alloy is classified as a machine that is difficult to process. material.

Check that the titanium alloy material has a tensile strength of 895 MPa or more and a lodging strength of 828 MPa or more before being processed. Due to the unique strength and properties of titanium alloys, if the titanium alloy is forcibly deformed by cavities, the material is liable to be broken and scrapped, and the tooth-shaped structure will produce a fracture surface or a fish scale when cavities. Titanium alloy materials, contrary to the general metal manufacturing process, are the first to have strength re-forming, which makes processing difficult, which is the main reason why mass production has not been possible. At present, the quality of the titanium alloy screws can only be made by CNC lathes, and the screws are produced by the car teeth. The output value is quite slow, the time cost is high, and the price of the screws is naturally high, so that the titanium alloy screws Manufacturing is still subject to greater restrictions. Therefore, the screws currently seen on the market cannot meet the high-order requirements, and it is a pity that the titanium alloy screws for mass production have not been seen in the market for consumers to choose.

In view of this, the inventor of the present case is aiming at the problem that the high-end screw mass production cannot be provided on the market at present, and actively seeks solutions through years of research and development and manufacturing experience in related industries, and continues to make efforts and research and trials. A method of forming a screw to solve the aforementioned deficiency.

How to improve the problems of the aforementioned conventional screws, and to provide a method for forming a titanium alloy in a tooth decay manner, thereby increasing the productivity is the object of the present invention.

The method for manufacturing the screw according to the present invention includes The dental plate step and the molding step. The preparation of the dental plate step is to prepare a second dental plate body, and the dental plate body is divided into a plurality of forming regions, and each forming region is provided with rough lines having different surface roughness values, and there are high and low levels between the forming regions. difference. The molding step is to erect the two corresponding corresponding tooth plate bodies in a screw forming machine, and the corresponding two teeth body are moved correspondingly, and the wire of a 6-4 titanium alloy is cut to a predetermined length. Cold forging to form a screw blank with a screw head, and then, using the relative movement of the two tooth plate bodies in the screw forming machine, the screw blank is subjected to the tooth decay operation, so that the screw blank is first loosened by the second tooth plate body The tight clamping relationship allows it to be formed in a progressive extrusion deformation.

The dental plate system is selected from a metal material having a Rockwell hardness (HRC) of 67 or more.

The height difference between the forming zones of the tooth plate body is a stepped relationship, so that the forming zone of the feeding end has the lowest height and the forming zone of the discharging end is the highest; but the height difference is a very small size. , the difference between each molding zone is between 0.01mm~0.05mm.

According to the preparation method and the dental plate structure provided by the invention, the titanium alloy is made into a screw with excellent performance, which not only increases the productivity, but also greatly improves the processing efficiency, and has great advantages for screw quality and cost reduction. Gain.

10‧‧‧ Preparation of dental plate steps

11‧‧‧ Dental board body

12‧‧‧ tooth surface

13‧‧‧ tooth groove

14‧‧‧First molding area

141‧‧‧ first rough surface

15‧‧‧Second molding zone

151‧‧‧second rough surface

16‧‧‧ Third molding zone

161‧‧‧ Third rough surface

17‧‧‧ Finishing area

20‧‧‧Molding steps

21‧‧‧Screw forming machine

The first figure shows a flow chart of the method of the present invention; the second figure shows the structure of the body of the tooth plate of the present invention; The third figure shows a schematic view of the molding area drop of the tooth plate body of the present invention; and the fourth figure shows the molding schematic of the present invention.

The detailed description of the present invention is set forth in the accompanying drawings. In addition, the present invention is intended to be illustrative of the basic structure of the present invention, and thus only the structures or elements related to the present invention are shown in the drawings. The shape, size, proportion, or number of components displayed is an optional design; all words about front, back, left and right, up and down, and horizontal or vertical are used for convenience only, and are not intended to limit the creation. Nor does it limit its components to any position or space;

In order to make the description of the present invention more detailed, the method of the present invention and its slab structure are described below in conjunction with the drawings.

Please refer to the flow chart of the manufacturing method of the present invention shown in the first figure. The present invention is a method for manufacturing a titanium alloy screw, which comprises a preparation step 10 and a molding step 20; wherein: The preparation of the dental plate step 10 is to prepare the second plate body 11. The dental plate body 11 is made of a metal material having a Rockwell hardness (HRC) of 67 or more, and one end surface thereof is a tooth surface 12, and the tooth surface 12 is provided with a plurality of rib grooves 13 arranged at an oblique interval. And each corner end of the rib groove 13 is formed in a circular arc shape; the dent surface 12 is further divided into A molding zone 14, a second molding zone 15, a third molding zone 16, and a finishing zone 17. The surface of the first molding zone 14 constitutes a first rough surface 141, the surface of the second molding zone 15 constitutes a second rough surface 151, and the surface of the third molding zone 16 constitutes a third rough surface 161, and the finishing zone The surface of the surface 17 is a flat surface except for the rib groove 13; the surface roughness value of the first rough surface 141 is the largest, and the surface roughness value of the second rough surface 151 is second, and the surface of the third rough surface 161 is the second. The thickness value is small. There is a height difference between the first molding zone 14, the second molding zone 15, the third molding zone 16 and the finishing zone 17 of the tooth surface 12, for example, a stepped relationship or a slope relationship. Wherein, the first forming zone 14 is the lowest, the second forming zone is 15 times, the third forming zone 16 is higher, and the finishing zone 17 is the highest; but the height difference is a very small size, between each forming zone The drop is between 0.01mm and 0.05mm, but not limited to this (as shown in the third figure). The above-mentioned dental plate body 10 can be subjected to surface treatment (for example, heat treatment) so that the Rockwell hardness (HRC) of the surface of the dental plate body 10 reaches 70 or more.

Referring to the fourth figure, the molding step 20 is to erect two corresponding dental plate bodies 11 in a screw forming machine 21, wherein one of the dental plate bodies 11 is fixed, and the other dental plate body 11 is Driven to cause the second plate body 11 to move correspondingly. Cutting a wire of a 6-4 titanium alloy to a predetermined length, and continuously forging a screw blank having a screw head, and then using the relative movement of the second plate body 11 in the screw forming machine 21, and the screw embryo The material is subjected to a caulking operation, and the screw blank enters from the first molding zone 14 of the dental plate body 11 and sequentially passes through the second molding zone 15, the third molding zone 16 and the finishing zone 17, due to the dental plate body 11 Advance on the tooth surface 12 The direction is set to a height difference from low to high, and the tooth surface 12 is densely covered with a deep to shallow rough design, so that the 6-4 titanium alloy screw blank is formed during the process of caulking, the second tooth plate body 11 pairs of screw blanks are given a loose and tight clamping relationship, and the cutting fluid is appropriately cooled during the process of cavities, so that the screw blanks are formed by progressive extrusion deformation, and the coarse lines of the rough surfaces can be The flow rate of the billet is reduced, and the titanium alloy has a sufficient shaping time and is shaped into a predetermined thread shape.

Therefore, by using the method of the present invention and the structure of the dental plate body 11, the titanium alloy (especially 6-4 titanium alloy) can be formed into a screw by means of tooth decay, and the screw especially refers to an iron plate tooth pattern. Screw; it is worth mentioning that the high-quality titanium alloy screw cannot be formed by the conventional squeegee method, and the structure of the dental plate body 11 of the present invention is combined with the squeezing speed and pressure of the second plate body 11. Accurate control of clearance and clamping force, and selective cooling of the cutting fluid during the tooth decay process to reduce the adhesion of the titanium alloy and the sipe 13 so that the screw blank is progressively loose and tight. The extrusion deformation method is formed, and the rough grain design of each rough surface is used in the forming process to reduce the flow rate of the billet, so that the titanium alloy has sufficient shaping time and is shaped into a predetermined thread shape.

Therefore, the current titanium alloy screws are mainly produced by turning, which has high production cost and poor production performance, and the present invention can overcome this problem in the form of tooth decay, except that the production cost and production time are greatly reduced. The screw quality has achieved breakthrough results by the structural technology of the dental plate body 10, thereby greatly improving the competitiveness.

By the detailed description of the above preferred embodiments, it is desirable The features of the present invention can be clearly described, and the present invention is not limited by the embodiments disclosed above. On the contrary, its purpose is to cover all kinds of equal changes; therefore, the creative department has many advantages and has significant practical characteristics, and its technical means and structural features are indeed developed by the creators of this case. The structure is more unseen, and the case has been in line with the requirements of the patent, and the application is filed according to law, and the patent right is prayed.

11‧‧‧ Dental board body

12‧‧‧ tooth surface

13‧‧‧ tooth groove

14‧‧‧First molding area

141‧‧‧ first rough surface

15‧‧‧Second molding zone

151‧‧‧second rough surface

16‧‧‧ Third molding zone

161‧‧‧ Third rough surface

17‧‧‧ Finishing area

Claims (5)

A dental plate structure made of a titanium alloy made of an iron die screw, comprising a second tooth plate body, wherein one end surface of the dental plate body is a tooth surface, and a plurality of rib grooves arranged obliquely spaced are arranged on the tooth surface Further divided into a first forming zone, a second forming zone, a third forming zone and a finishing zone, the surface of the first forming zone constitutes a first rough surface, and the surface of the second forming zone constitutes a second rough surface, the third forming The surface of the zone constitutes a third rough surface, and the surface of the finishing zone has a flat surface except for the rib groove; the first molding zone, the second molding zone, the third molding zone and the finishing zone are There is a difference in height, wherein the first forming zone is the lowest, the second forming zone is second, the third forming zone is higher, and the finishing zone is the highest. A dental plate structure made of a titanium alloy made of an iron die screw according to the first aspect of the patent application; wherein the dental plate system is selected from a metal material having a Rockwell hardness (HRC) of 67 or more. The tooth plate structure of the iron die screw made of titanium alloy according to claim 1, wherein the first rough surface of the tooth plate body has the largest surface roughness value, and the surface roughness value of the second rough surface is obtained. Secondly, the surface roughness value of the third rough surface is small. The dental plate structure of the iron die screw made of titanium alloy according to the first aspect of the patent application; wherein the first molding zone, the second molding zone, the third molding zone and the finishing zone of the dental plate body are There is a height difference, which is a step-like relationship, such that the height of the first forming zone is the lowest, the second forming zone is second, the third forming zone is higher, and the finishing zone is the highest; The difference is a very small size, and the difference between each molding zone is between 0.01 mm and 0.05 mm. The invention relates to a method for manufacturing an iron die screw made of titanium alloy, which comprises a step of preparing a dental plate and a molding step; the step of preparing a dental plate is prepared for preparing a second tooth plate body, wherein an end surface of the dental plate body is a tooth surface, on which The rib groove is arranged in an obliquely spaced manner, and the tooth surface is divided into a first forming zone, a second forming zone, a third forming zone and a finishing zone; and the forming step is to erect the corresponding corresponding tooth plate body In a screw forming machine, one of the dental plate bodies is fixed, and the other dental plate body can be driven to move the two dental plate bodies correspondingly, and a 6-4 titanium alloy wire is cut to a predetermined length. After the cold forging is formed to form the screw blank with the screw head, and then the relative movement of the two tooth plate body in the screw forming machine is used, and the screw blank is subjected to the tooth decay operation, and the screw blank is made up of the tooth plate body A forming zone enters, and then passes through the second forming zone, the third forming zone and the finishing zone in sequence, so that the 6-4 titanium alloy screw blank is subjected to tooth forming, and the second tooth plate body is given to the screw blank First loose and tight clamping relationship, so that the screw blank is progressive Molding and compression deformation mode.