Hub pressing mold
A technology for stamping dies and hubs, used in forming tools, manufacturing tools, bicycle accessories, etc., can solve problems such as poor quality assembly, reduced economic benefits, and defective breakage rates at turning points.
Inactive Publication Date: 2010-09-29
谢德源
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Problems solved by technology
[0004] However, since the existing hubs are mainly made of aluminum extruded seamed or seamless pipes, which are affected by the lack of hardness, strength and ductility, if the blades are formed by stamping, the walls on both sides of the blades must be opposite to each other. It is close to each other, so it is prone to breakage at the turning point (the defect rate is as high as 2-30%), so no matter what the shape of the blade is still achieved by extrusion, this is not only the problem of poor quality and subsequent assembly At the same time, the processing speed cannot be accelerated, so it not only increases the processing time, but also increases the manufacturing cost of the hub and reduces its economic benefits.
[0005] Aiming at the problems faced by the above-mentioned patents in the manufacture of hubs, and through years of experience in R&D and manufacturing in related industries, the inventor has finally successfully developed a hub manufacturing method and its stamping die through continuous efforts and research. To overcome the aforementioned problems of slow speed and poor quality, and at the same time improve the hardness and strength of the hub
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[0057] The present invention is a flower hub manufacturing method and stamping die thereof, wherein the manufacturing method is as figure 2 As shown, it includes a step of forming a straight pipe S201, a formation of an arc portion S202, an annealing S203 and a die stamping blade S204, and can be as follows Figure 3 to Figure 5 As shown, the two ends of the pre-formed straight tube 1 form arc-shaped convex wheel arcs 2A, and a straight port 2B protrudes from the different outer sides of the two wheel arcs 2A to form a hub semi-finished product 2, and finally Then use stamping technology to respectively form the two wheel arcs 2A into blades 3A, and then form the finished product of the hub 3; wherein:
[0058] The step of forming the straight pipe S201, which is as image 3 As shown, the aluminum hollow seamless pipe is cut into a straight pipe 1 of predetermined length;
[0059] The step of forming the arc portion S202 is to use the technical means of rolling or mold pressi...
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The invention relates to a hub manufacturing method and a stamping die, in particular to a hub manufacturing method which has fast processing speed and can improve quality and a stamping die thereof; in the invention, the hub is formed by the following steps: forming a straight tub, forming wheel arch parts, annealing, stamping blades by the die, heat treatment, and the like; the stamping die forcausing the hub to form blades includes a lower die, a stretching die and an upper die; the wheel arch parts can be formed at two ends, and an annealed semi-finished product can be placed in the stretching die, and the upper die and the lower die are driven to form the blades on two wheel arch parts by means of stamping, so as to form the finished hub product; with the design, the manufacturing speed of the hub can be effectively raised, the hardness and strength of the hub can be further enhanced and the quality of the hub can be improved.
Description
technical field [0001] The invention relates to a flower hub stamping die. Background technique [0002] The bicycle hub is an important component used to pivot the wheel on the frame. The hub is roughly formed as a tubular body for the hub shaft fixed on the frame to pass through, and the two ends of the hub are formed with large The diameter of the blade, the blade has several perforations, for the spokes to be erected between the wheel rim, and the manufacture of the general flower hub is to form a pre-formed straight tube of a specific length through rolling to form a semi-finished product with wheel arcs at both ends. Finally, the extrusion dies are used to extrude the arcs of the two wheels into blades to form finished hubs. Due to the shortcomings of this traditional manufacturing method, such as slow speed and difficult control of precision, the industry has developed many different types of hub manufacturing. Method, such as China Taiwan Announcement No. 154540 and...
Claims
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IPC IPC(8): B23P15/00B21D53/86B21D37/10B21D37/12
Inventor 谢德源
Owner 谢德源