TW201416148A - Forming method for ball-shaped head of hand tool and device thereof - Google Patents

Abstract

The present invention provides a forming method for ball-shaped head of hand tool and device thereof. The forming method includes the following steps: (A) preparing a rod raw material in a predetermined length; (B) placing the raw material in a stretching mold to form a pre-forging piece, wherein the pre-forging piece includes a first segment, a second segment and a tapered segment connecting the second segment and the first segment in a tapered manner; and, (C) placing the pre-forging piece in a head forging mold to form the first segment with a connection portion connected with the tapered segment and a ball-shaped head connected with the end of the connection portion away from the tapered segment. The ball-shaped head of hand tool made by forging with the aforementioned steps may effectively reduce the costs of equipment and material, reduce the processing time, and enhance the overall strength.

Description

Method and device for forming ball head of hand tool

The present invention relates to a molding method and apparatus thereof, and more particularly to a method and apparatus for forming a ball head of a hand tool.

The existing hand tool with the ball-type wrench head 1 is mostly formed by the cutting method shown in FIG. 1. First, the cutting tool 100 cuts one side of the ball-type wrench head 1 at one end of the blank 101, and then cooperates with the precision. A rotary positioning device (not shown) drives the blank 101 to rotate at a set angle, so that the cutting tool 100 sequentially cuts out the other five faces of the ball wrench head 1 to form the hand tool.

Although the ball-type wrench head 1 can be formed by the cutting method, the following disadvantages still need to be improved:

1. High cost: Since the high-precision rotary positioning device is required to drive the blank 101 to rotate according to the set angle, the cutting tool 190 can be cut out of the ball-shaped wrench head 1 in sequence, so that the equipment cost is high. Moreover, the waste generated during the cutting process also makes the raw material cost higher.

Long processing time: Since the ball-shaped wrench head 1 is required to be formed by a plurality of reciprocating cuttings, the processing time is long.

Poor strength: Since the cutting will destroy the continuity of the blank 101, the overall strength of the hand tool having the ball-type wrench head 1 is reduced.

In order to improve the above-mentioned shortcomings of simply forming the ball-type wrench head 1 by cutting, the related industry has developed a patent for the invention of the method of manufacturing the ball-type wrench head of the Republic of China Bulletin No. I247648. The main improvement lies in: The ball-shaped wrench head is formed by cutting and rolling, which can reduce the equipment cost and reduce the processing time. However, since cutting is still required, it is still impossible to overcome the problems of poor strength and excessive raw material cost caused by cutting waste.

Accordingly, it is an object of the present invention to provide a method of forming a hand tool ball head which can reduce equipment and material costs, reduce processing time, and improve overall strength.

Therefore, the method for molding the ball head of the hand tool of the present invention comprises the following steps: (A) preparing a columnar blank of a set length, the billet having an opposite first end and a second end; (B) Forming the blank into an elongated die to form a pre-forging, the pre-forging comprising a first segment extending from the first end toward the second end, and a direction from the second end toward the first end a second segment extending, and a push-pull segment connecting the second segment and the first segment in a push-pull manner, the outer diameter of the first segment being smaller than the outer diameter of the second segment, and the pushing segment The outer diameter is tapered from the second section toward the first section; and (C) the pre-forging is placed in a forging die such that the first section forms a joint portion connected to the push-out section, and A ball-shaped head connected to one end of the connecting portion away from the push-out section.

Another object of the present invention is to provide a molding apparatus for a ball head of a hand tool which can reduce equipment and material costs, reduce processing time, and improve overall strength.

Therefore, the forming device of the ball head of the hand tool of the present invention is for processing a columnar blank, and the molding device comprises an elongated die and a space provided at intervals Forging die.

The elongated mold includes an elongated female mold and an elongated male mold reciprocally movable relative to the elongated female mold, the elongated female mold having an elongated hole for receiving the cylindrical blank, the elongated hole having a direction away from the a receiving portion extending in the direction of the elongated male mold to accommodate the cylindrical blank, a narrowing portion communicating with the receiving portion and extending away from the receiving portion, and being connected to the narrowing portion And an outward portion extending away from the accommodating portion, the outer diameter of the accommodating portion being larger than the outer diameter of the elongated portion.

The forging die includes a forging die disposed at an interval from the elongated die, and a forging die that is reciprocable relative to the forging die, the forging die having a positioning hole, the forging die a first forging head module and a second forging head module, and a pressing rod controlled to be interposed between the first forging head module and the second forging head module, the first forging The head module cooperates with the second forging head module to define a molding space opposite to the positioning hole, the positioning hole has a positioning portion having the same outer diameter as the receiving portion, and is connected to the positioning portion and facing a push-out portion extending away from the positioning portion, the molding space having a neck facing the push-out portion, and a substantially spherical head connected to the neck, the outer diameter of the head being larger than the The outer diameter of the neck.

The utility model has the beneficial effects that the blank material is formed by the elongated mold and the forging die according to the above steps, and the ball-shaped head of the hand tool is formed without cutting process, thereby effectively reducing equipment and raw material costs, reducing processing time, and Improve overall strength.

The foregoing and other technical content, features and effects of the present invention are The detailed description of the two preferred embodiments with reference to the drawings will be clearly described below.

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

Referring to FIG. 2, a first preferred embodiment of the ball forming head forming device 2 of the hand tool of the present invention comprises a chamfering die 21, an elongated die 22 spaced apart from the chamfering die 21, and an elongated die 22 A printing die 23 is provided at intervals, and a forging die 24 is provided spaced apart from the printing die 23. In the preferred embodiment, the chamfering die 21, the elongated die 22, the printing die 23 and the forging die 24 are mounted on a forging machine.

Referring to FIG. 3, the chamfering die 21 includes a chamfering die 211 and a chamfering male die 215 that is reciprocable relative to the chamfering die 211. The chamfering mother die 211 has a hexagonal chamfered hole 212 having an opening 213 opening toward the chamfering male mold 215, and a opening portion 213 formed away from the opening The first chamfered portion 214 on one side of the chamfer male mold 215.

Referring to FIG. 4, and referring back to FIG. 2, the elongated mold 22 includes an elongated female mold 221 spaced apart from the chamfering female mold 211, and a pre-extending master mold 221 and reciprocally movable relative to the elongated female mold 221 The elongated elongate male mold 226 has an elongated hole 222 having a hexagonal cross section.

The extending hole 222 has a receiving portion 223 extending away from the extending male die 226, a narrowing portion 224 communicating with the receiving portion 223 and gradually extending away from the receiving portion 223, and a narrowing portion 224 An extending portion 225 that communicates with the narrowing portion 224 and extends away from the receiving portion 223, the receiving portion The outer diameter of the 223 is larger than the outer diameter of the elongated portion 225.

Referring to FIGS. 4 and 5, the print mold 23 includes a print master 231, and a print male mold 235 that is reciprocally movable relative to the print master 231 and has a set graphic 238. The print master 231 has a print hole. 232, the printing hole 232 has a guiding portion 233 having the same outer diameter as the narrowing portion 224, and a receiving portion 234 that communicates with the guiding portion 233 and has the same outer diameter as the elongated portion 225. The print male mold 235 has a first print module 236 and a second print module 237 that are oppositely disposed and formed with a set graphic 238.

Referring to FIG. 6, and referring back to FIG. 2, the forging die 24 includes a forging die 241 spaced apart from the printing die 231, and a forging die lower than the forging die 241. The die 241 reciprocates the forging die 245. The forging die 241 has a positioning hole 242 having a first forging die 246 and a second forging die 247, and a controlled insertion of the first forging A squeeze rod 248 between the head module 246 and the second forging head module 247.

The positioning hole 242 has a positioning portion 243 having the same outer diameter as the receiving portion 223, and a pushing portion 244 that communicates with the positioning portion 243 and that gradually tapers away from the positioning portion 243. The first forging head module 246 cooperates with the second forging head module 247 to define a molding space 25 opposite to the positioning hole 242, and the molding space 25 has a neck portion 251 facing the pushing portion 244, and A generally spherical head 252 that communicates with the neck 251, the outer diameter of the head 252 being greater than the outer diameter of the neck 251.

Referring to Figures 7 and 8, and referring back to Figure 3, a first preferred embodiment of the method for forming a ball-shaped head of the hand tool of the present invention is to use the ball of the above hand tool. The first preferred embodiment of the forming device 2 of the head is carried out. Therefore, the device structure described in the embodiment is a preferred embodiment of the forming device 2 of the ball head of the hand tool, so that it is not This is described in detail.

First, as shown in step 31, a columnar blank 41 of a set length is prepared by the cutting device, and the blank 41 has an opposite first end 411 and a second end 412. In the preferred embodiment, the blank 41 is a hexagonal cylinder having a length of 27 mm.

Next, as shown in step 32, the blank 41 is placed in the opening 213 of the chamfered hole 212 of the chamfering female mold 211, and the chamfering male mold 215 is engaged with the first end 411 and the first The two ends 412 form a chamfer 413 that cooperates with the first chamfered portion 214. In the preferred embodiment, the first end 411 of the blank 41 is first placed into the opening 213 toward the first chamfered portion 214, and the chamfer 413 is formed at the first end 411, and then The second end 412 of the blank 41 is placed into the opening 213 toward the first chamfered portion 214, and a chamfer 413 is formed at the second end 412.

Referring to Figures 7 and 8, and referring back to Figure 4, then, as shown in step 33, the first end 411 of the blank 41 from which the chamfer 413 has been formed is placed in the elongated female mold 221 toward the elongated female mold 221 The receiving portion 223 of the elongated hole 222 is forged with the elongated male mold 226 to shape the blank 41 into a pre-forging 42.

The pre-forging member 42 includes a first segment 421 corresponding to the extending portion 225, a second segment 422 conforming to the receiving portion 223, and a first and second connection with the narrowing portion 224. The second segment 422 and the push segment 423 of the first segment 421. In the preferred embodiment, the first segment 421 and the push segment The total length of the 423 is 12 mm, the length of the second section 422 is 20 mm, and the outer diameter of the first section 421 is smaller than the outer diameter of the second section 422.

Referring to Figures 7 and 8, and reviewing Figure 5 together, next, as shown in step 34, the first section 421 of the pre-forging 42 is placed in the print hole 232 of the print master 231 toward the print master 231. The guiding portion 233 and the receiving portion 234 of the printing hole 232 cooperate with the pushing portion 423 and the first portion 421 of the pre-forging 42 to position the pre-forging 42 in the printing hole 232. The first printing module 236 formed on the setting graphic 238 and the second printing module 237 sandwich the second segment 422, and the corresponding segment 238 is formed on the second segment 422. Thereafter, the first The printing module 236 and the second printing module 237 can be separated from each other to eject the pre-forging 42 from the printing hole 232 of the printing master 231.

Referring to Figures 7 and 8, and recalling Figure 6, together, finally, as shown in step 35, the pre-forging 42 is placed in the positioning hole 242 of the forging die 241, and the first of the pre-forging 42 is placed. The positioning hole 242 is protruded toward the forging die 245, and the positioning portion 243 and the pushing portion 244 of the positioning hole 242 are used to position the second segment 422 of the pre-forging 42 and the pushing portion 423. The first 421 is shortened to form a connecting portion 424 connected to the pushing portion 423, and a connecting portion 424 is disposed away from the pushing portion 423. A ball head 425 at one end. In the preferred embodiment, the length of the push-out section 423 and the connecting portion 424 and the ball-shaped head 425 is 10 mm, and the second section 422, the push-out section 423, the connecting portion 424, and the ball type The total length of the head 425 is 30 mm.

The blank 41 is matched with the chamfering mold 21 and the elongated mold according to the above steps. With the 22, the printing die 23, and the forging die 24, the length change of the blank 41 is used instead of the cutting process, which not only can effectively reduce the cost of equipment and raw materials, reduce the processing time, but also improve the overall strength.

Referring to Figures 9 and 10, the second preferred embodiment of the forming apparatus 2 for the ball-shaped head of the hand tool of the present invention is substantially the same as the first preferred embodiment. The difference is that the forming apparatus 2 further includes a a bending die 26 spaced apart from the forging die 24, and the chamfering male die 215 of the chamfering die 21 is formed with a shaft hole 216 opposite to the chamfered hole 212 and having a hexagonal cross section, the shaft hole The 216 has a shaft hole portion 217 having an outer diameter identical to the opening portion 213, and a second chamfer portion 218 formed on a side of the shaft hole portion 217 away from the opening portion 213. The bending die 26 includes a bending die 261 spaced apart from the forging die 24, and a bending male die 262 reciprocally movable relative to the bending die 261.

Referring to Figures 11 and 12, and referring back to Figure 9, a second preferred embodiment of the method for forming a ball-shaped head of the hand tool of the present invention is a second preferred embodiment of the forming device 2 for the ball-shaped head using the hand tool. The embodiment is carried out. Therefore, the device structure described in the embodiment is the second preferred embodiment of the ball-shaped head forming device of the hand tool, and therefore will not be further described herein.

The second preferred embodiment of the method for forming a ball-shaped head of the hand tool of the present invention is substantially similar to the first preferred embodiment, except that it further includes a step 36 following the step 35.

Due to the molding method of the ball-shaped head of the hand tool of the present invention and the second preferred embodiment of the molding apparatus 2, the molding method of the ball-shaped head of the hand tool is substantially similar to the first preferred embodiment of the molding apparatus 2, Therefore, in addition to In addition to the same effect as the first preferred embodiment, the second chamfered portion 218 of the chamfered male mold 215 can be forged once, that is, at the first end 411 and the second end 412 of the blank 41. At the same time, the chamfer 413 is formed, and the processing time is more effectively shortened.

Moreover, the second segment 422 of the pre-forging member 42 can be bent by the bending of the bending die 261 and the bending male die 262 of the bending die 26 by the step 36, so that the second segment 422 can be formed into a connection. The bending portion 427 of the pushing portion 423 and the bending portion 427 bent outward from the end of the pushing portion 423 are integrated with the bending mold 26 by the step 36. The bending process makes the overall applicability higher.

In summary, the method and apparatus for forming a ball-shaped head of the hand tool of the present invention causes the blank 41 to cooperate with the chamfering mold 21, the elongated mold 22, the printing mold 23, and the forging die 24 according to the above steps. By forging the ball head 425, the cost of the equipment and raw materials can be effectively reduced, the processing time can be reduced, and the overall strength can be improved, so that the object of the present invention can be achieved.

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

2‧‧‧Molding device

21‧‧‧Chamfering mould

211‧‧‧Chamfered master

212‧‧‧Chamfered holes

213‧‧‧ openings

214‧‧‧First chamfering

215‧‧‧Chamfered male model

216‧‧‧ shaft hole

217‧‧‧ shaft hole

218‧‧‧Second chamfering

22‧‧‧Elongation mould

221‧‧‧Extension master

222‧‧‧Elongation hole

223‧‧‧ 容部

224‧‧ ‧ reduction

225‧‧‧Extension

226‧‧‧Extended male model

23‧‧‧Printing mold

231‧‧‧Printing master

232‧‧‧Print hole

233‧‧‧Guidance

234‧‧‧容装部

235‧‧‧Printing male model

236‧‧‧First print module

237‧‧‧Second print module

238‧‧‧Set graphic

24‧‧‧Forging die

241‧‧‧Forging die

242‧‧‧Positioning holes

243‧‧‧ Positioning Department

244‧‧‧Pushing Department

245‧‧‧Forehead male model

246‧‧‧First Forging Head Module

247‧‧‧second forging head module

248‧‧‧Extrusion rod

25‧‧‧ molding space

251‧‧‧ neck

252‧‧‧ head

26‧‧‧Bending mould

261‧‧‧Bending master

262‧‧‧Bending public model

31‧‧‧Prepared to set a length of a columnar billet

32‧‧‧Chamfering at both ends of the billet

33‧‧‧Making the blank into a pre-forging

34‧‧‧ Forming the setting text in the second section of the pre-forging

35‧‧‧First paragraph of extruded pre-forgings

36‧‧‧Bending the second paragraph of the pre-forging

41‧‧‧Bulette

411‧‧‧ first end

412‧‧‧ second end

413‧‧‧Chamfering

42‧‧‧Pre-forgings

421‧‧‧ first paragraph

422‧‧‧ second paragraph

423‧‧‧Pick section

424‧‧‧Connecting Department

425‧‧‧Spherical head

426‧‧‧ Rod

427‧‧‧Bend

1 is a schematic view showing a molding method of a conventional ball-type wrench head; FIG. 2 is a schematic view showing a first preferred embodiment of a molding apparatus for a ball-shaped head of the hand tool of the present invention; FIG. 3 is an enlarged schematic view showing Chamfering in the first preferred embodiment FIG. 4 is an enlarged schematic view showing the aspect of the elongated mold in the first preferred embodiment; FIG. 5 is an enlarged schematic view showing the state of the printing mold in the first preferred embodiment; 6 is an enlarged schematic view showing the aspect of the forging die in the first preferred embodiment; FIG. 7 is a flow chart showing a first preferred embodiment of the forming method of the ball-shaped head of the hand tool of the present invention; 8 is a schematic view, which is a supplementary explanation of FIG. 7. FIG. 9 is a schematic view showing a second preferred embodiment of the molding apparatus for the ball-shaped head of the hand tool of the present invention; FIG. 10 is an enlarged schematic view showing the second preferred embodiment. FIG. 11 is a flow chart showing a second preferred embodiment of the method for forming a ball-shaped head of the hand tool of the present invention; and FIG. 12 is a schematic view for explaining FIG.

31‧‧‧Prepared to set a length of a columnar billet

32‧‧‧Chamfering at both ends of the billet

33‧‧‧Making the blank into a pre-forging

34‧‧‧ Forming the setting text in the second section of the pre-forging

35‧‧‧First paragraph of extruded pre-forgings

Claims (10)

A method for forming a ball-shaped head of a hand tool, comprising the steps of: (A) preparing a columnar blank of a set length, the billet having an opposite first end and a second end; (B) the embryo The material is placed in an elongated mold to form a pre-forging member, the pre-forging member including a first segment extending from the first end toward the second end, and a portion extending from the second end toward the first end a second segment, and a push-pull connection of the second segment and the first segment, the outer diameter of the first segment is smaller than the outer diameter of the second segment, and the outer diameter of the push segment is And the (C) the pre-forging member is placed in a forging die, so that the first segment forms a connecting portion connected to the pushing portion, and is connected to The connecting portion is away from the ball-shaped head at one end of the push-out section. The method for molding a ball-shaped head of a hand tool according to claim 1, further comprising a step (D) subsequent to the step (C), wherein the step (D) is to bend the first portion by using a bending die In the second stage, the second section forms a rod portion connected to the pushing section, and a bending portion bent outward from the end of the rod portion away from the pushing section. The method for forming a ball-shaped head of a hand tool according to claim 1, further comprising a step (E) between the step (A) and the step (B), wherein the step (E) is the billet Placed in a chamfering mold and chamfered at the first end and the second end. The method for molding a ball-shaped head of a hand tool according to any one of claims 1 to 3, further comprising a step (B) and a step (C) Between step (F), the step (F) is to place the pre-forging in a printing mold to form a setting graphic on the second segment. A forming device for a ball-shaped head of a hand tool for processing a columnar blank, the molding device comprising: an elongated mold comprising an elongated female mold, and an elongated male mold reciprocally movable relative to the elongated female mold, The elongated female mold has an elongated hole for accommodating the columnar blank, and the elongated hole has a receiving portion extending away from the elongated male mold to receive the cylindrical blank, and the receiving portion a converging portion that communicates in a direction away from the accommodating portion, and an elongated portion that communicates with the constricted portion and extends away from the accommodating portion, the outer diameter of the accommodating portion being greater than the elongation An outer diameter of the portion; and a forging die comprising: a forging die disposed at an interval from the elongated die, and a forging die that is reciprocable relative to the forging die, the forging die having a positioning a hole, the forging head male mold having a first forging head module and a second forging head module, and a controlled insertion between the first forging head module and the second forging head module a pressing rod, the first forging head module cooperates with the second forging head module to define a a positioning space opposite to the positioning hole, the positioning hole has a positioning portion having the same outer diameter as the receiving portion, and a pushing portion communicating with the positioning portion and extending away from the positioning portion, the molding space There is a neck facing the push-out portion, and a substantially spherical head connected to the neck, the outer diameter of the head being larger than the outer diameter of the neck. A molding apparatus for a ball-shaped head of a hand tool according to claim 5, further comprising a bending die spaced apart from the forging die, the bending The folding mold includes a bending master mold spaced apart from the forging head master mold, and a bending male mold reciprocally movable relative to the bending master mold. A molding apparatus for a ball-shaped head of a hand tool according to claim 5, further comprising a chamfering mold spaced apart from the elongated mold, the chamfering mold comprising a chamfering mother spaced apart from the elongated female mold a chamfering male mold capable of reciprocating relative to the chamfering female mold, the chamfering female mold having a chamfered hole for receiving the cylindrical blank, the chamfered hole having a a columnar blank having an opening facing the chamfering mandrel and a first chamfered portion formed on one side of the opening away from the chamfering mandrel. The ball-shaped head forming device of the hand tool according to claim 5, further comprising a printing die interposed between the forging die and the elongated die, the printing die comprising a printing master, and a relative The printing master reciprocates and is formed with a printing male mold having a setting graphic, the printing mother mold has a printing hole having a guiding portion having the same outer diameter as the contracting portion, and a communicating portion of the guiding portion a receiving portion having the same outer diameter as the elongated portion, the printing male mold having a first printing module and a second printing module disposed opposite to each other and having a setting graphic. The ball-shaped head forming device of the hand tool according to the seventh aspect of the invention, wherein the chamfering male die is formed with a shaft hole opposite to the chamfered hole, the shaft hole having an outer diameter equal to the opening portion a shaft hole portion and a second chamfered portion formed on a side of the shaft hole portion away from the opening portion. A molding apparatus for a ball-shaped head of a hand tool according to claim 5, wherein the elongated male mold of the elongated mold is located on the elongated female mold The forging die of the forging die is located below the forging die.