Machining method for drum brake
A technology of mechanical processing and brake drums, which is applied in the direction of manufacturing tools, metal processing equipment, metal processing machinery parts, etc., can solve the problem of difficulty in guaranteeing the processing accuracy of cylindrical drums, easy jumping of brake drums, and inability to fix brake drums. To improve processing accuracy and product quality, prevent sinking or partial deviation, and fix firmly
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Embodiment 1
[0072] A method for manufacturing a brake drum, comprising the following steps:
[0073] S1: Turning, using the positioning anti-sinking device for rough turning and finishing turning;
[0074] S2: Drilling processing, using drilling fixtures, internally using tooling to match the chuck, externally using ejector rods to fix the brake drum, and CNC drilling processing.
[0075] Said step S1 car processing, as attached Figures 1 to 3 As shown, the positioning anti-sinking device adopted is installed on the workbench 2 of the ZL2-550 vertical lathe, and two sets of jaws 3 are arranged symmetrically on the workbench 2, including two sets of symmetrically arranged and The anti-sinking mechanism 4 interlaced with the positions of the two groups of claws, the anti-sinking mechanism includes a base 41, a height adjustment part 42, a length adjustment part 43 and a support part 44; the support part 44 is arranged on the length adjustment part 43 near one end of the center of the wor...
Embodiment 2
[0079] as attached Figure 4 As shown, the step S1 turning process is different from the embodiment 1 in that the present embodiment 2 is provided with three sets of the same anti-sinking mechanism 4, surrounding the space between two sets of jaws 3 on the workbench 2 The included angle is set at 120 degrees; since the three sets of anti-sinking mechanisms 4 are obliquely used on the side wall of the bottom of the brake drum 1, their force can be adjusted to point to a position closer to the product body center, and the triangular force It is more stable and uniform, which can further reduce the error generated during processing, and avoid the possibility of local sinking deviation of the brake drum 1 .
Embodiment 3
[0081] as attached Figure 5 As shown, on the basis of Embodiment 2, the included angle d between the inclined working surface 46 and the support portion 44 in Embodiment 3 is 10 degrees, and the convex portion of the arc surface is evenly arranged on the inclined working surface 46 , reduce the probability of not fitting with the contact surface, and reduce the error; the length adjustment part 43 is also provided with an inclination angle adjustment mechanism, which can be superimposed by connecting the length adjustment part 43 and the height adjustment part 42 with an existing damping Realized by means of a rotating shaft, the inclination angle of the length adjusting part 43 is controlled between 30 degrees and 80 degrees, which further improves the operation convenience and product adaptability of the anti-sinking mechanism.
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