Bicycle rim and method for drilling the rim
A processing method, bicycle technology, applied to rims, vehicle parts, transportation and packaging, etc., can solve the problems of high manufacturing cost, complicated process, broken rim, etc., and achieve the effect of not destroying the structure, simplifying the process, and reducing material waste
Active Publication Date: 2021-11-16
FRAT IND
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Problems solved by technology
[0003] In order to cooperate with the installation of other components (such as air nozzles), in the prior art, the cutting drill is generally used to drill the rim, but the aforementioned processing method directly destroys the structure of the rim, so it is bound to affect the rim Even after being used with the aforementioned components for a period of time, it is easy to cause the rim to break along its own extrusion direction due to the stress concentration, and in order to remove the burrs on the edge of the hole, it may be necessary after the drilling step There will be one more step of milling, so it will lead to the problems of complicated process, expensive manufacturing cost and waste of materials
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[0040] The applicant first explains here that in the embodiments and drawings to be described below, the same reference numerals denote the same or similar components or structural features.
[0041] Please see first figure 1 and figure 2 The rim 10 of the first embodiment of the present invention includes two opposite side walls 20 , an inner ring wall 30 and an outer ring wall 40 . The inner ring wall 30 is integrally connected to the bottom ends of the two side walls 20, and the outer ring wall 40 is integrally connected between the two side walls 20 and is held between the top ends of the two side walls 20 and the inner ring wall 30 respectively. A predetermined distance, wherein the inner ring wall 30 has a plurality of first through holes 32 arranged at equal intervals, the first through holes 32 run through the top and bottom sides of the inner ring wall 30, and the bottom ends of the first through holes 32 are flush with the The bottom surface of the inner ring wall...
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The invention relates to a bicycle rim, which includes an inner ring wall and an outer ring wall, the outer ring wall surrounds the inner ring wall and is separated from the inner ring wall by a predetermined distance, wherein the inner ring wall A first perforation is processed by drilling, and a second perforation corresponding to the first perforation is processed on the outer ring wall by hot spinning. A support portion is extruded from the periphery of the bottom end. Thereby, the rim of the present invention provides a good supporting effect for the supporting parts (such as air nozzles) matched with it, and in addition, the processing method of the hot spinning method can eliminate the congenital weakness of the slit-extruded rim , and achieve the effects of simplifying the process, not destroying the structure and reducing material waste.
Description
technical field [0001] The invention relates to bicycles, in particular to a bicycle rim and a drilling method for the rim. Background technique [0002] As far as the traditional bicycle rim manufacturing method is concerned, the alloy material is mainly extruded by extrusion. During extrusion, the alloy material must first be heated to a semi-molten state, and then squeezed into the alloy with multiple holes under pressure. The front mold is divided into three or four pieces, and then they are put into the rear mold together for fusion and extrusion, and then the rear mold is extruded by pressure, fixed by welding, and finally bent into a ring-shaped frame. And the two ends of the annular frame are connected together, so that a seam-extruded rim is formed. [0003] In order to cooperate with the installation of other components (such as air nozzles), in the prior art, the cutting drill is generally used to drill the rim, but the aforementioned processing method directly d...
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IPC IPC(8): B60B21/00B21D22/14
CPCB21D22/14B60B21/00
Inventor 何凯文
Owner FRAT IND