TWI527640B - A method for manufacturing a screw - Google Patents

Description

Screw manufacturing method

The present invention relates to a method of manufacturing a screw, and more particularly to a method of manufacturing a screw that prevents incompletely missing a screw.

Referring to FIG. 1 and FIG. 2, the manufacturing method 1 of the conventional screw includes a preparation step 11, a molding step 12 and a cavities step 13; wherein the preparation step 11 is provided with a metal material a; The molding step 12 is provided with a molding die 121 and a die 122 corresponding to the molding die 121. The molding die 121 defines an accommodating space 1211 for the blanking material a. a tapered head forming region 123 connected to the space 1211 and communicating with the outside, and a plurality of forming holes 124 provided at the wall surface 1231 of the head forming region 123, and the wall surface 1231 of the head forming region 123 is a smooth surface; that is, when the blank a is subjected to a punching operation, one end of the blank a can be formed into a rod 21, and the other end of the blank a is formed into a tapered head 22 At the same time, the tapered portion of the head 22 is convexly projected with the protrusion 221; finally, the tooth decay step 13 is provided with a dent device (not shown) for threading the rod 21 The molding operation, thus completing the manufacture of the screw 2.

However, in the conventional screw manufacturing method 1, the material required for each screw 2 is used by the actuarial to avoid unnecessary material waste, and As a result of the increase in the cost of the cost, when the blank a is subjected to the press forming operation, the blank a cannot be accurately grasped by the extent and direction of the blank, so that the blank a is not only stamped in the head forming region 123 but also When the head 22 of the screw 2 is completed, the protrusions 221 are formed into an incomplete state, and the screw 2 is formed into an incomplete state. Defective products, so as to reduce the production yield of the product, and cause waste of materials, there is room for improvement.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method of manufacturing a screw which is provided with a embossing design on a forming die during the manufacturing process of the screw head so that the molding die can be accurately placed in the screw head during the stamping process. A plurality of studs are formed on the portion to greatly reduce the poor shape of the studs.

Therefore, the present invention discloses a method for manufacturing a screw, which includes a preparation step, a molding step, and a tooth decay step; wherein, in the molding step, a molding die is provided, and a die corresponding to the molding die is disposed. At the same time, the design of the plurality of ridges is convex on the wall surface of the forming section of the forming die; therefore, when the punching operation is performed, the blanking material of the metal material is prepared by the preparing step, and the forming die and the die are Forming a rod body and a head portion by stamping, and forming a plurality of concave grooves and a plurality of protruding protrusions at the taper portion of the head portion, so that the blank material is stamped and protruded from the forming mold The blocking of the plurality of ridges is expanded toward a plurality of molding holes formed on the molding die, thereby avoiding the fact that the billet cannot be effectively protruded toward the molding holes, thereby causing the protrusions to be formed. In addition to the complete situation, it can achieve the effects of reducing material waste and reducing product defect rate.

(known)

1‧‧‧screw manufacturing method

11‧‧‧Material preparation steps

12‧‧‧Molding steps

13‧‧‧ tooth decay steps

121‧‧‧Molding mould

122‧‧‧ die

123‧‧‧Head forming area

124‧‧‧Formation

1211‧‧‧ accommodating space

1231‧‧‧ wall of the head forming area

A‧‧‧bump

2‧‧‧ screws

21‧‧‧ rod body

22‧‧‧ screw head

23‧‧‧ threaded teeth

221‧‧‧Bump

(this creation)

3‧‧‧screw manufacturing method

31‧‧‧Material preparation steps

32‧‧‧Molding steps

33‧‧‧ tooth decay steps

321‧‧‧Forming mould

322‧‧‧ die

323‧‧‧Head forming area

324‧‧‧Formation

325‧‧‧ embossing

3211‧‧‧ accommodating space

3231‧‧‧ wall of the head forming area

A‧‧‧Bullen

4‧‧‧ screws

41‧‧‧ rod body

42‧‧‧ head

43‧‧‧ threaded teeth

421‧‧ ‧ Groove

422‧‧‧Bump

1 is a flow chart of a conventional method of manufacturing a screw.

Fig. 2 is a schematic view showing the molding of the conventional screw manufacturing method.

Figure 3 is a flow chart of the first embodiment of the present invention.

Fig. 4 is a schematic view showing the molding of the first embodiment of the present invention.

Figure 5 is a perspective view of a forming screw of the first embodiment of the present invention.

Figure 6 is a perspective view of a forming screw of a second embodiment of the present invention.

The above and other technical contents, features, and advantages of the present invention will become apparent from the Detailed Description of the <RTIgt;

Before the present invention is described in detail, it is noted that in the following description, like elements are denoted by the same reference numerals.

Referring to FIG. 3 and FIG. 4, a screw manufacturing method 3 according to a first preferred embodiment of the present invention includes a preparation step 31, a molding step 32 and a cavities step 33; wherein the preparation step 31 has a metal material blank A; the molding step 32 is provided with a molding die 321 and a die 322 corresponding to the molding die 321 , wherein the molding die 321 has a built-in blank for the blank A The accommodating space 3211, a tapered head forming area 323 connected to the accommodating space 3211 and communicating with the outside, and a plurality of forming holes 324 disposed at the wall surface 3231 of the head forming area 323 are Embodiments of the forming pockets 324 are a plurality of ridges 325 are protruded from the wall surface 3231 of the head forming area 323, and the ridges 325 are presented in a concentric arrangement of spaced-apart arrangements; finally, the fangs are The step 34 is provided with a dent device (not shown) for performing the dentition forming operation on the rod 41 formed by the forming step 32 by the forming step 32, thus completing the manufacture of the screw 4.

Referring to FIG. 3 and FIG. 4, when the manufacturing of the screw forming is performed, the blank A provided in the preparation step 31 is first placed in the molding die 321 so that the blank A is placed in the accommodating space 3211. The billet A is stamped by the die 322 corresponding to the molding die 321 , and the head forming region 323 of the molding die 321 is tapered, so that the stamping operation is performed. At the end, one end of the blank A is formed by the top of the molding die 321 to form a rod 41, and the other end is formed with a tapered head 42 in the head forming region 323, in particular In the stamping process, since the protrusions 325 and the forming holes 324 are provided on the head forming area 323, the blank A can be deformed when the head forming area 323 is pressed. The expansion and the like are not only blocked by the ridges 325, but also the blank A is expanded in the stamping direction to the forming pockets 324, and then filled in the forming pockets 324, so that the blanks The material A has a complex shape on the head 42 formed by the head forming area 323. a groove 421 corresponding to the shape of the ridges 325, and at the same time projecting a plurality of protrusions 422 corresponding to the shapes of the forming holes 324 (ie, forming step 32); finally, in the tooth decay step 33, The dentition device (not shown) performs a gingival molding operation on the rod body 41, whereby a plurality of screw teeth 43 are formed on the rod body 41, such as This completes the manufacture of the screw 4 as shown in FIG.

Referring to FIG. 4 and FIG. 6 , in the second preferred embodiment of the present invention, the foregoing steps and the required components are the same as those in the first embodiment, and will not be described in detail; in particular, the protrusion is formed on the head. The ridges 325 on the area 323 are presented in an irregularly staggered manner in this embodiment, so that when the blank A is intended to be formed by the head forming area 323, the head 42 is stamped out. Also, it can be blocked by the irregular ribs 325, and further, the concave portion 421 having a plurality of irregularities is formed on the head 42 so that the design of the ridges 325 is irregular. The same effect as the previous embodiment can still be achieved, so that the studs 422 are indeed stamped.

In summary, the screw of the present invention and the manufacturing method thereof are subjected to subsequent steps of molding and cavities after the feed of the blank, and the design of the plurality of ridges on the head forming region of the molding die is formed during the molding process. The billet is subjected to the stop of the embossing during the pressing process, so that the billet does not expand outward, and is pressed toward the inside of the molding cavity, so that the studs are formed. Therefore, the production yield of the product can be greatly improved, and the waste of materials and the like are not caused, so that the object of the present invention is achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the description of the invention. All should remain within the scope of the invention patent.

3‧‧‧screw manufacturing method

31‧‧‧Material preparation steps

32‧‧‧Molding steps

33‧‧‧ tooth decay steps

Claims (4)

A method for manufacturing a screw, comprising: a preparation step comprising: a metal material blank; a molding step comprising: a molding die; and a die corresponding to the molding die, wherein The molding die has an accommodating space for the blank to be placed therein, a tapered head forming region connected to the accommodating space and communicating with the outside, and a plurality of wall portions disposed at the head forming region a molding hole, wherein the wall surface of the head forming region is convexly provided with a plurality of ridges, so that when the molding die and the die are pressed for the blank, the molding die is formed so that one end of the blank is molded into a rod body, and The other end of the blank is formed with a tapered head, and a plurality of concave grooves are formed at the tapered surface of the head and a convex column is protruded; and a tooth decay step is provided. The dental device can perform a screw forming operation on the rod body, that is, complete the manufacture of the screw. The method of manufacturing a screw according to the first aspect of the invention, wherein the grooves are arranged in a concentric manner. The method of manufacturing a screw according to the first aspect of the invention, wherein the grooves are present in an irregularly staggered manner. The method of manufacturing a screw according to the first aspect of the invention, wherein the studs are tapered.