TWI415696B - Hand tools - Google Patents

Abstract

This invention provides a manufacturing method of hand tool, comprising the following step: (A) preparing a metallic material; (B) punching the metallic material to form a blank body in such a way that the blank body has a flat matching surface and form a half tool head, a half arm, and a half pivot part sequentially along an axial direction of the matching surface; (C) mutually fixing the matching surfaces of two blank bodies to each by welding, so as to constitute a complete hand tool. Accordingly, this invention can achieve the design object of lowering the production cost of the hand tool and enables the hand tool to show extremely high precision and reliability.

Description

Hand tool making

The invention especially relates to a high-quality hand tool made by semi-stamping and welding, so that the existing hand tool set can be provided, and the diameter has the economic principle, the processing precision is improved, and the high quality is maintained. ‧‧‧ and so on.

The folding tool set that is common to us has a frame, a bolt shaft bridged to the frame, and a plurality of hand tools pivoted to the bolt shaft, thereby allowing the hand tools to be folded and hidden in the frame. To provide us with access at any time.

Specifically, as shown in FIG. 1 , it is an electric chain tool set, which mainly integrates the electric chain tool with a hand tool that may be used by other bicycles, and includes a chain drive (10) and a connection a frame (20) on one side of the chain driver (10), at least one bolt shaft (30) bridging the frame (20), and a hand tool set (40) pivotally connected to the bolt shaft (30), the hand tool set (40) is composed of a plurality of hand tools (41) (42) (43) of different sizes or types, such that the hand tools (41) (42) (43) are concealed in the frame (20). It is provided for carrying, or is used outside the framework (20) as shown in Figure 1.

However, such hand tools (41) (42) (43) are manufactured for this purpose, and at least four are known at present:

(1) Mechanical cutting processing: As shown in FIG. 2, the hand tool (41) basically has a tool head (411), a pivoting portion (412), a connecting tool head (411), and a pivoting portion (412). An arm portion (413) for manufacturing the tool head (411) and the arm portion (413) of the hand tool (41) by milling, and then drilling the pivot portion (412) thereof, the process of which is Complex, poorly produced, and will generate a lot of waste, so there are disadvantages of high cost.

(2) Die-casting method: it injects a metal with good condensability into a high-heat-resistant steel mold at a high pressure, and uses a casting method in which a steel mold is rapidly solidified at a lower temperature, and then mechanically processes the final size of the chainer. However, in the casting process, the hand tool (41) generates sand holes more or less, so there is a problem that the defective product rate is high.

(3) Dewaxing casting: after it is first made into a wax mold, it is repeatedly coated with the slurry, and then the wax is dissolved by heat to form a casting method of the mold cavity. The advantages are high dimensional precision, smooth casting surface, no parting mode limitation, and disadvantages. In order to produce extremely high costs, the unit price is extremely expensive.

(4) Plastic injection: The forming hand tool (41) has the disadvantages of low stress and easy damage.

Therefore, it is an important issue to provide a product that can greatly increase productivity and reliability while maintaining hand tool accuracy.

The main content of the present invention is to provide a method for manufacturing a hand tool, which includes:

(A) preparing a metal raw material;

(B) stamping and forming the metal material into an embryo body, so that the embryo body has a flat facing surface, and a pair of tool heads and a pair of half arms are sequentially formed along the axial direction of the mating surface. a pair of half pivots;

(C) Fixing the mating faces of the two embryo bodies to each other by welding, thus forming a complete hand tool.

It is to be understood from the above description that the present invention produces a high-quality, high-precision embryo body by a stamping process, and combines the two embryo bodies in a welding process, and the technical features of such integrated stamping and welding are compared with the prior art. In addition to greatly saving man-hours and improving efficiency, and meeting the economic principles and novel functions in the mass production of embryo bodies, in order to remove the bad problems of the conventional method, effectively improve the quality and improve the production efficiency, it is indeed a folding hand tool. The group hand tool proposes a novel technology that is effectively solved.

In order to enable the reviewing committee to further understand the structure, features and other objects of the present invention, the drawings of the preferred embodiments are described in detail as follows: Please refer to FIG. 3, the steps of the present invention include:

(A) preparing a metal material having a set weight and shape;

(B) The metal material is subjected to continuous die-forming to form an embryo body (41A) (41B) having excellent precision, structural strength, and mechanical properties, so that the embryo body (41A) (41B) has a flat fit. a face (410), and a pair of tool heads (411), a pair of half arms (413), and a pair of half pivots (412) are sequentially formed along the axial direction of the mating face (410). The mating surface (410), the tool head (411), the arm portion (413), and the pivoting portion (412) of the embryo body (41A) (41B) are successively stamped, so that the metal grains therein are formed. The tissue is locally, progressively and gently generating flow and distortion, which can effectively maintain the continuity, uniformity and flow linearity of the structural structure, and make it more compact, fine-grained and homogenized, so the shaped embryo Body (41A) (41B) can obtain good structural strength and mechanical properties, thereby avoiding the damage caused by casting or hot forging, such as structural damage and work hardening;

(C) The opposing faces (410) of the two body bodies (41A) (41B) are fixed to each other by welding, so that a complete hand tool (41) can be constructed.

In particular, welding can be done in two convenient ways:

(1) The positioning surface (410) of the two embryo bodies (41A) (41B) is attached and positioned by a jig, and then automatically welded by a spot welding machine.

(2) A flux (FLUX) is applied to the facing surface (410) of the second body (41A) (41B), and then they are bonded to each other, and then dried and sent to a brazing furnace for processing. .

Therefore, in the above description, it can be understood that the second embryo body (41A) (41B) of the present invention adopts the same pair of continuous molds, and can be formed by stamping and forming without waste, and its productivity is far more than mechanical cutting and die casting. Or the dewaxing casting is faster, and the quality and precision can be controlled in an optimal state. In addition, the process of welding the two embryo bodies (41A) (41B) can also be automated, so that the invention can be revolutionized as a whole. Highly creative and economical, making production more efficient for industrial use;

In summary, the production process of the present invention completely breaks through the problem of low production efficiency and deterioration of the quality defect rate by the reforming and adopting method, and is a high-level creation of a technical concept, which should meet the requirements of the patent application, and apply in accordance with the law.

(10). . . Chainer

(20). . . frame

(30). . . Bolt axis

(40). . . Hand tool set

(41)(42)(43). . . Hand tool

(41A) (41B). . . Embryo

(410). . . Matching face

(411). . . Tool head

(412). . . Pivot

(413). . . Arm

Figure 1 is a schematic view of the appearance of a conventional chainer tool set.

Figure 2 is a schematic view of the appearance of a conventional hand tool.

Figure 3 is an exploded perspective view of the hand tool of the present invention.

(41). . . Hand tool

(41A) (41B). . . Embryo

(410). . . Matching face

(411). . . Tool head

(412). . . Pivot

(413). . . Arm

Claims (3)

A hand tool manufacturing method comprising the steps of: (A) preparing a metal material; (B) cold forging the metal material into a body by a continuous die, so that the body has a flat facing surface and is aligned a pair of tool heads, a pair of half arms, and a pair of half pivot portions are formed in the axial direction; and (C) the opposing faces of the two embryo bodies are positioned by a jig, and then The mating faces of the two embryo bodies are fixed to each other by welding, thereby forming a complete hand tool. For example, in the hand tool manufacturing method described in claim 1, the metal material has a set weight and shape to facilitate subsequent cold forging. The hand tool manufacturing method according to claim 1 or 2, wherein the (C) process is to apply a flux to the mating surfaces of the two embryo bodies, and then, to adhere to each other, and then to be hardened after being dried. The furnace is processed and completed.