Bicycle below tube arc mill

Abstract

The invention discloses a radian milling machine of the lower pipe for a bicycle. The machine comprises a machine frame, a clamping mechanism, a first knife milling seat, a second knife milling seat and a third knife milling seat; wherein, the first knife milling seat, the second knife milling seat and the third knife milling seat are respectively provided with a first mobile knife milling fixed seat, a second mobile knife milling fixed seat and a third mobile knife milling fixed seat, three of which are respectively arranged onto the machine frame corresponding to the position relation of a bicycle head pipe, a five way pipe and an upright pipe of the bicycle. The three mobile knife milling fixed seats are able to rotate around the axial line of the seats. In this way, the bicycle head pipe and the five way pipe as well as the upright pipe are respectively proceeded with radian milling operation at the front end and back end parts of the lower pipe to be processed, and also are drilled with holes at the lateral part of the lower pipe by the drill seat. Through simulating the assembling relationship of the bicycle frame, the invention complete the processing of the lower pipe under the first time and also has the advantages of convenient assembling and clamping operation, high efficiency of processing and accurate processing position.

Description

technical field [0001] The invention relates to a bicycle down tube arc milling machine, in particular to a device for milling arcs on the down tube of a bicycle. Background technique [0002] As shown in FIG. 6 , the bicycle frame usually includes an upper beam tube (91), a head tube (92), a bottom bracket tube (93), a seat tube (95) and a down tube (9). 9) To be able to be smoothly assembled with other parts of the frame, arc surfaces need to be machined at both ends of the down tube (9), and sometimes holes are required on the down tube (9) to install the bottle cage (94). Using the existing technology to process the lower tube needs to be completed in multiple steps, the processing efficiency is low and the processing accuracy is poor, and the processed lower tube often still has deviations during assembly, which affects the smooth welding of the frame, or after the welding is completed. It also needs to be adjusted separately, which is very inconvenient. SUMMARY OF T...

AI Technical Summary

Problems solved by technology

Using the existing technology to process the lower tube needs to be processed step by step through multiple processes, the processing efficiency is low and the processing accuracy is poor, and the processed lower tube often still has deviations during assembly, which affects the smooth welding of the frame, or after welding is completed Additional adjustments are required, which is very inconvenient

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