US20040188268A1

US20040188268A1 - Manufacturing procedure of hand tool

Info

Publication number: US20040188268A1
Application number: US10/402,764
Authority: US
Inventors: Chih-Ching Hsien
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-03-28
Filing date: 2003-03-29
Publication date: 2004-09-30
Also published as: JP2004291203A

Abstract

A manufacturing procedure of a hand tool includes the steps of: forging the workpiece, annealing the workpiece, rolling the workpiece in a barrel, performing a first surface treatment, machining the surface of the workpiece, performing a heat treatment on the workpiece, performing a second surface treatment, performing a third surface treatment, vibrating the workpiece, and electroplating the workpiece. Thus, the whole surface of the hand tool has the same color and brightness, thereby enhancing the aesthetic quality of the hand tool.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a manufacturing procedure of a hand tool, and more particularly to a manufacturing procedure of a hand tool, wherein the whole surface of the hand tool has the same color and brightness, thereby enhancing the aesthetic quality of the hand tool.

2. Description of the Related Art

A conventional manufacturing procedure of a hand tool (such as a wrench) in accordance with the prior art shown in FIG. 4 comprises the following steps: forging the workpiece into a semi-product, sand-blasting the workpiece, machining the workpiece, including marking, typewriting, forming a concave portion in the shank of the workpiece, drilling and the like, rough polishing the workpiece, and electroplating the workpiece, thereby forming the product such as the wrench as shown in FIG. 5.

However, as shown in FIG. 5, the corner of the

concave portion

3 of the wrench produces a rough face 1, and the corner of the mark also produces a rough face 2, thereby decreasing the aesthetic quality of the wrench. In addition, the surface of the concave portion 3 of the wrench and the surface of the wrench do not have the same color and brightness, thereby decreasing the aesthetic quality of the wrench.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a manufacturing procedure of a hand tool, wherein the whole surface of the hand tool has the same color and brightness, thereby enhancing the aesthetic quality of the hand tool.

Another objective of the present invention is to provide a manufacturing procedure of a hand tool including three surface treatments, so that the surface of the concave portion of the workpiece and the surface of the workpiece have the same color and brightness, and so that the workpiece has the optimum smooth surface.

A further objective of the present invention is to provide a manufacturing procedure of a hand tool including a first surface treatment to treat the surface of the workpiece, a second surface treatment to remove the fur produced during the machining process and the carbon plate produced during the heat treatment, and a third surface treatment to treat the surface of the workpiece, so that the corners of the marks, the concave portion or the like of the workpiece have a smooth surface.

A further objective of the present invention is to provide a manufacturing procedure of a hand tool including an annealing process to decrease the structural hardness of the surface of the workpiece to facilitate the following working process.

In accordance with the present invention, there is provided a manufacturing procedure of a hand tool, comprising the steps of:

(A) preparing a metallic workpiece to be worked;

(B) forging the workpiece into a semi-product;

(C) annealing the workpiece to decrease the hardness of the workpiece;

(D) rolling the workpiece in a barrel, so as to remove the carbon plate produced during the annealing process;

(E) performing a first surface treatment to treat the surface of the workpiece;

(F) machining the surface of the workpiece;

(G) performing a heat treatment on the workpiece to enhance the hardness of the workpiece;

(H) performing a second surface treatment to treat the surface of the workpiece, so as to remove the fur produced during the machining process and the carbon plate produced during the heat treatment;

(I) performing a third surface treatment to treat and smooth the surface of the workpiece;

(J) vibrating the workpiece to remove the polishing lines produced during the above processes; and

(K) electroplating the workpiece to produce an electroplating layer on the workpiece, thereby preventing the workpiece from being rusted.

Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flow chart of a manufacturing procedure of a hand tool in accordance with the preferred embodiment of the present invention; [0023]
FIG. 2 is a perspective view of the hand tool in accordance with the preferred embodiment of the present invention; [0024]
FIG. 3 is a top plan view of the hand tool as shown in FIG. 2; [0025]
FIG. 4 is a flow chart of a conventional manufacturing procedure of a hand tool in accordance with the prior art; and [0026]
FIG. 5 is a perspective view of conventional the hand tool in accordance with the prior art.[0027]

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially to FIG. 1, a manufacturing procedure of a hand tool (such as a wrench) in accordance with the preferred embodiment of the present invention comprises the following steps: [0028]
(A) preparing a metallic workpiece to be worked; [0029]
(B) forging [0030] 10: forging the workpiece into a semi-product;
(C) annealing [0031] 11: annealing the workpiece to decrease the hardness of the workpiece;
(D) rolling the barrel [0032] 12: placing sands into a barrel to grind the workpiece in a rotational manner, so as to remove the carbon plate produced during the annealing process;
(E) first surface treatment: performing a first surface treatment to treat the surface of the workpiece by [0033] rough polishing 13 and rough vibrating 14;
(F) machining [0034] 15: machining the surface of the workpiece, including extruding and forming, marking, typewriting, forming a concave portion in the shank of the workpiece (such as the wrench), drilling and the like;
(G) heat treatment [0035] 16: performing a heat treatment on the workpiece to enhance the hardness of the workpiece;
(H) second surface treatment: performing a second surface treatment to treat the surface of the workpiece by [0036] fine polishing 17, so as to remove the fur produced during the machining process and the carbon plate produced during the heat treatment, wherein the second surface treatment is a larger area treatment;
(I) third surface treatment: performing a third surface treatment to treat the surface of the workpiece by manual work or secondary mechanical sand-[0037] blast 18, wherein the third surface treatment is a smaller area treatment to treat the corner or the like of the workpiece;
(J) vibrating [0038] 19: vibrating the workpiece by the chemical material or vibration stones, to remove the polishing lines and treat the small pores at the surface, so as to enhance the integrity of the surface; and
(K) electroplating [0039] 20: electroplating the workpiece to produce an electroplating layer on the workpiece, thereby preventing the workpiece (such as the wrench) from being rusted.
In the step (D), the process of rolling the [0040] barrel 12 can be replaced by a sand-blasting process. However, the workpiece will produces small pits during the sand-blasting process. Thus, the manufacturing procedure in accordance with the preferred embodiment of the present invention employs the process of rolling the barrel 12.
In the step (E), the process of the first surface treatment can treat the small pits produced during the sand-blasting process. [0041]
Accordingly, the manufacturing procedure of the present invention uses an annealing process to decrease the structural hardness of the surface of the workpiece to facilitate the following working process. In addition, the manufacturing procedure of the present invention uses a first surface treatment to treat the surface of the workpiece, a second surface treatment to remove the fur produced during the machining process and the carbon plate produced during the heat treatment, and a third surface treatment to treat the surface of the workpiece, so that the corners of the marks, the concave portion or the like of the workpiece have a smooth surface. Further, by the three surface treatments, the surface of the concave portion of the workpiece and the surface of the workpiece have the same color and brightness, so that the workpiece has the optimum smooth surface. [0042]
Thus, the [0043] wrench 30 made by the manufacturing procedure of the present invention shown in FIGS. 2 and 3.
Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention. [0044]

Claims

What is claimed is:

1. A manufacturing procedure of a hand tool, comprising the steps of:

(A) preparing a metallic workpiece to be worked;

(B) forging the workpiece into a semi-product;

(C) annealing the workpiece to decrease the hardness of the workpiece;

(E) performing a first surface treatment to treat the surface of the workpiece;

(F) machining the surface of the workpiece;

2. The manufacturing procedure of a hand tool in accordance with claim 1, wherein the step (D) includes placing sands into the barrel to grind the workpiece in a rotational manner.

3. The manufacturing procedure of a hand tool in accordance with claim 1, wherein in the step (E), the first surface treatment is performed by rough polishing and rough vibrating.

4. The manufacturing procedure of a hand tool in accordance with claim 1, wherein the step (F) includes extruding and forming, marking, typewriting, forming a concave portion in the shank of the workpiece, and drilling.

5. The manufacturing procedure of a hand tool in accordance with claim 1, wherein in the step (H), the second surface treatment is performed by fine polishing.

6. The manufacturing procedure of a hand tool in accordance with claim 5, wherein the second surface treatment is a larger area treatment.

7. The manufacturing procedure of a hand tool in accordance with claim 1, wherein in the step (I), the third surface treatment is performed by manual work or secondary mechanical sand-blast.

8. The manufacturing procedure of a hand tool in accordance with claim 7, wherein the third surface treatment is a smaller area treatment.

9. The manufacturing procedure of a hand tool in accordance with claim 1, wherein the step (J) includes vibrating and grinding the workpiece by chemical material or vibration stones.

10. The manufacturing procedure of a hand tool in accordance with claim 1, wherein in the step (D), the process of rolling the workpiece in a barrel can be replaced by a sand-blasting process.

11. The manufacturing procedure of a hand tool in accordance with claim 10, wherein in the step (E), the process of the first surface treatment can treat small pits produced during the sand-blasting process.