TWI862894B - Wrench body manufacturing process - Google Patents

Abstract

The present invention is a process for manufacturing a wrench body, including the following steps: material preparation, preparing metal coils; preliminary processing, using a processing machine to straighten the metal coils and cut the obtained metal cylindrical rods; shaping, placing the metal cylindrical rods on the processing machine fixture, with a section of the aforementioned metal cylindrical rods exposed outside the fixture, starting the processing machine to perform extrusion processing on the exposed part of the aforementioned metal cylindrical rods, and obtaining a rough blank of the wrench body with a wide head and a narrow body; finished product processing, using a processing machine to cut the rough blank of the wrench body to complete the wrench body, so that there is no need to cut a large amount of material in order to process the shape of a wide head and a narrow body as in the known process. It can be seen that the present invention has indeed reduced the waste of raw materials after improving the process of the wrench body.

Description

Wrench body manufacturing process

The present invention relates to a wrench body manufacturing process, in particular a manufacturing process technology that can reduce the amount of raw materials used.

A wrench is a very common hand tool, generally used to loosen and tighten screws, nuts, etc. Even with the rapid development of technology today, wrenches are still irreplaceable hand tools, and there is even a greater demand for them. That is why so many people have invested in the wrench manufacturing industry, and the competition is fierce. It is not easy for relevant companies to maintain both product quality and price competitiveness.

The cost and quality of the wrench are determined by the choice of manufacturing process. The common manufacturing process of the wrench body is to use a long cylindrical raw material with hot forging, cutting and other technologies to make the wrench body. However, this common wrench body and its manufacturing process have a big disadvantage, that is, the waste of raw materials is quite large. The reason is that the appearance of the wrench body must be wide head and narrow body (wide wrench head, narrow handle). Therefore, when choosing a long cylindrical raw material, the overall outer diameter of the raw material must be selected according to the maximum width of the wrench body after forming. When cutting the narrower handle part and cutting off the edge material around the wrench head (the part of the surrounding bulge deformation and overflow caused by hot forging), a lot of raw materials will be cut off, which is quite wasteful.

In view of the above content, it can be known that the known wrench body and its manufacturing process have the problem of excessive material waste. Now with the development of technology, the total consumption of metal raw materials in the world is increasing day by day, resulting in the continuous increase in the cost of raw materials. Therefore, it is quite necessary to improve the manufacturing process of the wrench body or develop a wrench body structure that can save the material used in the manufacturing process to reduce the waste of raw materials.

The present invention is an improved process for manufacturing the wrench body. The metal cylindrical rod is manufactured based on the size of the handle, and the rough blank with a wide head and narrow body is obtained by extrusion processing. In this way, there is no need to cut a large amount of material in order to process the shape of the wide head and narrow body as in the conventional process. Moreover, due to the use of extrusion processing, the rough blank with a wide head and narrow body has a smooth and neat appearance after being formed, and there is no need to cut the edge material as in the conventional process. It can be seen that the present invention has indeed reduced the waste of raw materials after improving the process of the wrench body, and the wrench body structure produced can indeed save the process materials.

In order to achieve the above-mentioned purpose and effect, the present invention provides a wrench body manufacturing process, which includes the following steps: material preparation, preparing metal coils; preliminary processing, using a processing machine to straighten the metal coils and cut the obtained metal cylindrical rods; shaping, placing the metal cylindrical rods on the processing machine fixture, a section of the aforementioned metal cylindrical rods is exposed outside the fixture, and starting the processing machine to perform extrusion processing on the exposed part of the aforementioned metal cylindrical rods, and a rough blank of the wrench body with a wide head and a narrow body is obtained; finished product processing, using a processing machine to cut the rough blank of the wrench body to complete the wrench body.

A wrench body is also provided, wherein: the wrench body includes a handle and a wrench head connected to each other, the width of the wrench head is greater than that of the handle, one side of the wrench head has a pivot hole, the other side of the wrench head has a slot connected to the pivot hole, and the width of part of the wrench head is gradually reduced toward the handle; wherein the handle is formed by straightening and cutting a metal coil, and the wrench head is formed by extruding a part of the straightened and cut metal coil by a processing machine, and the slot and the pivot hole are formed by cutting the wrench head by the processing machine.

100:Metal coils

200:Metal cylindrical rod

300: Fixture

400: Pressure head

500: Rough blank of wrench body

600: Wrench body

601: Wrench head

602: Grip

603: hinge

604: Container

S1: Preparation

S2: Preliminary processing

S3: Shaping

S4: Finished product processing

S10: Preparation

S20: Preliminary processing

S30: Shaping

S40: Annealing

S50: Finished product processing

The first figure is a schematic diagram of the manufacturing process steps of the present invention.

The second picture is a schematic diagram of metal coils.

The third picture is a schematic diagram of cutting out metal cylindrical bars after straightening the metal coil.

The fourth picture is a schematic diagram of the metal cylindrical rod in the fixture.

The fifth picture is a schematic diagram of the processing machine performing extrusion processing on a metal cylindrical rod.

The sixth picture is a schematic diagram of the rough blank of the wrench body.

The seventh figure is a schematic diagram of the wrench body.

Figure 8 is a schematic diagram of the process of the present invention including the annealing step.

To understand the implementation of the present invention in more detail, please refer to the accompanying drawings. As shown in the first to seventh figures, a wrench body manufacturing process includes the following steps: material preparation S1, preparing metal coil 100; preliminary processing S2, using a processing machine to straighten and cut the metal coil 100 to obtain a metal cylindrical rod 200; shaping S3, placing the metal cylindrical rod 200 on a processing machine fixture 300, with a section of the aforementioned metal cylindrical rod 200 exposed outside the fixture 300, starting the processing machine to perform extrusion processing on the exposed portion of the aforementioned metal cylindrical rod 200, and obtaining a wrench body rough blank 500 with a wide head and a narrow body; finished product processing S4, using a processing machine to cut the wrench body rough blank 500 to complete the wrench body 600.

Continuing from the above content, the implementation method of the present invention is further described in detail. First, prepare the material S1. Since the goal is to first produce a metal cylindrical rod 200 of the size of the wrench handle 602, a metal coil 100 with a diameter similar to the diameter of the wrench handle 602 is selected as the initial material (refer to the second figure).

In the subsequent preliminary processing step S2, one end of the metal coil 100 is straightened by a processing machine (such as a screwdriver), and the straightened portion is then cut into a metal cylindrical rod 200 of appropriate length (see the third figure).

In the subsequent shaping step S3, the processing machine positions the metal cylindrical rod 200 on the fixture 300. At this time, the metal cylindrical rod 200 will be as shown in the fourth figure. Most of it will be immersed in the fixture 300, and only a small part will be exposed outside the fixture 300. The shape design of the pressing head 400 of the processing machine is similar to the prototype of the wrench head. Therefore, after the pressing head 400 of the processing machine performs a head extrusion process on the part of the metal cylindrical rod 200 exposed outside the fixture 300, it will be as shown in the fifth figure. The part of the metal cylindrical rod 200 exposed outside the fixture 300 is squeezed and shaped into a shape wider than before squeezing. After it is taken out of the fixture 300, it will be as shown in the sixth figure. The rough blank 500 of the wrench body.

The subsequent finished product processing step S4 is to perform the post-processing on the wrench body rough blank 500. For example, the invention takes the ratchet-type wrench body 600 as an example. The post-processing is to cut out the wider part (wrench head 601) of the wrench body rough blank 500 to form a groove 604 and a pivot hole 603 for mounting the ratchet and accommodating internal parts. In this way, the wrench body 600 is manufactured as shown in Figure 7, and the structure of the manufactured wrench body 600 can indeed save materials in the manufacturing process.

It can be clearly known from the above steps that the metal cylindrical rod 200 of the present invention is manufactured based on the size of the handle 602, and the rough blank with a wide head and a narrow body is obtained by extrusion processing. In this way, there is no need to cut a large amount of material in order to process the shape of the wide head and a narrow body as in the known process. Moreover, due to the use of extrusion processing, the rough blank with a wide head and a narrow body has a smooth and neat appearance after being formed, and there is no need to cut the edge material as in the known process. It can be seen that after the present invention improves the process of the wrench body 600, it has indeed reduced the waste of raw materials and is truly novel and progressive.

In addition, the process of the present invention may also include an annealing step, as shown in the eighth figure, which is material preparation S10, preliminary processing S20, shaping S30, annealing S40, and finished product processing S50. The straightening in the preliminary processing S20 step and the extrusion processing in the shaping S30 step will leave residual stress in the rough blank 500 of the wrench body, and annealing can change the machinability, hardness, and internal stress of the metal raw material. However, not all metal raw materials need annealing S40 before subsequent processing. For example, for steel, the amount of carbon content and the amount of alloy will affect whether the steel needs annealing S40 before subsequent processing. Therefore, the annealing S40 step is a step that users can choose whether to perform according to the purpose and the type of raw materials used.

The above is only used to explain the preferred embodiment of the present invention, and is not intended to limit the present invention in any form. Therefore, any modification or change made to the present invention under the same spirit of the invention, which is another form that can be implemented and has the same effect, should still be included in the scope of protection intended by the present invention.

In summary, the "wrench body manufacturing process" of the present invention is indeed fully in line with the development needs of the industry in terms of practicality and cost-effectiveness, and the disclosed invention is also an unprecedented innovative process, so there is no doubt that it is "novel". In addition, the present invention can achieve cost reduction improvements over the conventional process, so it is also "progressive". It fully complies with the provisions of the Patent Law of the Republic of my country on the application requirements for invention patents. Therefore, a patent application is filed in accordance with the law, and we sincerely request the Jun Bureau to review and affirm it as soon as possible.

S1: Preparation

S2: Preliminary processing

S3: Shaping

S4: Finished product processing

Claims (2)

A wrench body manufacturing process includes the following steps: material preparation, preparing metal coils; preliminary processing, using a processing machine to straighten the metal coils and cut the obtained metal cylindrical rods; shaping, placing the metal cylindrical rods on the processing machine fixture, with a section of the metal cylindrical rods exposed outside the fixture, starting the processing machine to perform extrusion processing on the exposed part of the metal cylindrical rods, and obtaining a wrench body blank with a wide head and a narrow body; finished product processing, using a processing machine to cut a slot and a hinge on the wider part of the wrench body blank to complete the wrench body. The wrench body manufacturing process as described in claim 1 further includes an annealing step between the shaping step and the finished product processing step, which is to anneal the rough blank of the wrench body to release the internal residual stress.

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