Manufacturing and processing technology of a piston cylinder

Abstract

The invention discloses a manufacturing and processing technology of a piston barrel. The technology comprises steps as follows: S1, shearing; S2, blanking; S3, stretching; S4, lug stamping; S5, punching; S6, cutting and step turning, that is, the barrel bottom is cut off to form a communicated tubular structure, and a step is turned on the outer side surface of the lower part of the barrel; S7, polishing of the inner side wall of the barrel; S8, notch punching: a notch is punched in the end port of the top of the barrel in the radial direction; S9, welding of a terminal: the terminal is welded on the outer side surface of the upper part of the barrel; and S10, welding of a flange; the flange is welded on the step and is tightly attached to the end surface of the step. According to the manufacturing and processing technology, a stretching technology is firstly used for manufacturing the piston barrel of a coffee machine, and the problem of leakage caused by non-uniform thickness and insufficient sealing by a conventional rolling welding technology can be solved; and besides, by means of the stretching technology, bulges during welding cannot be caused, so that the bulge part is not required to be polished, the technological steps are omitted, and the production and processing efficiency is improved.

Description

technical field [0001] The invention relates to a piston cylinder, in particular to a piston cylinder manufacturing and processing technology. Background technique [0002] The piston barrels of traditional household appliances such as coffee machines are mainly made by two processes; one is polished metal tubes, the polishing process is difficult to control, and it is easy to cause excessive polishing degree, resulting in insufficient cylinder strength and large roundness tolerance. If the tolerance is large, there will be a gap between the piston barrel and the piston, and there will be a problem of leakage due to insufficient sealing; another process is made by rolling, welding and polishing of metal sheets. This method requires complicated welding. Seam elimination process, at the same time, there will be the problem of leakage caused by the uneven thickness of the piston cylinder and insufficient sealing in the first process; the existence of the above problems, especia...

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Problems solved by technology

[0002] The piston barrels of traditional household appliances such as coffee machines are mainly made by two processes; one is polished metal tubes, the polishing process is difficult to control, and it is easy to cause excessive polishing degree, resulting in insufficient cylinder strength and large roundness tolerance. If the tolerance is large, there will be a gap between the piston barrel and the piston, and there will be a problem of leakage due to insufficient sealing; another process is made by rolling, welding and polishing of metal sheets. This method requires complicated welding. Seam elimination process, at the same time, there will be the problem of leakage caused by the uneven thickness of the piston cylinder and insufficient sealing in the first process; the existence of the above problems, especially for export manufacturing, the inspection standard is extremely strict, may Leads to serious quality problems and makes the coffee machine have a short service life, so it is necessary to improve this

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