Automatic process for bending pipe

Abstract

The invention relates to an automatically tube bending process which comprises the following steps: a straight glass tube is automatically transported to a tube bending furnace by a feeding device; the straight glass tube is heated in the tube bending furnace, and the bending reflection of the straight glass tube is controlled by a photoelectric measuring device during heating; then the heated straight glass tube is transported to a tube bending device for tube winding operation, the glass tube is inflated at the end of tube winding, and the dimension of the inflated glass tube is controlled by means of photoelectric measurement; and the spiral bent power saving fluorescent lamp is taken off from the tube bending device. The automatically tube bending process has the advantages that the glass tube heating and softening degree and the glass tube recovery dimension are automatically controlled by the photoelectric measuring device, so that the defect of timing control existing in the prior process is overcome; the process has self-adaptive control capacity on the influences of great temperature variation of the tube bending furnace and an error between the diameter and the wall thickness of the glass tube, and the like; and the process is simple and reliable, and has high rate of finished products and stable quality.

Description

【Technical field】 [0001] The invention relates to a pipe bending process, in particular to an automatic pipe bending process in the manufacture of spiral energy-saving lamp tubes. 【Background technique】 [0002] At present, the exposed tubes of spiral energy-saving lamps are generally manufactured by hand. The workers use the method of visual inspection to control the degree of heating and softening of the glass tube and the restoration of the size of the wound glass tube. Due to the bending process, this method is not only labor-intensive for workers, but also not easy. Help safe production, and production efficiency is very low. Therefore, there are currently many researches and developments on automatic pipe bending machines that improve this processing method, but the current automatic pipe bending machines are not yet mature and cannot be used in large quantities in the market. The size of the glass tube is restored by a timed blowing process. Machine bending requires...

AI Technical Summary

Problems solved by technology

[0002] At present, the exposed tubes of spiral energy-saving lamps are generally manufactured by hand. The workers use the method of visual inspection to control the degree of heating and softening of the glass tube and the restoration of the size of the wound glass tube. Due to the bending process, this method is not only labor-intensive for workers, but also not easy. Conducive to safe production, and the production efficiency is very low

Therefore, there are currently many researches and developments on automatic pipe bending machines that improve this processing method, but the current automatic pipe bending machines are not yet mature and cannot be used in large quantities in the market. The size of the glass tube is restored by regular blowing process

Machine bending requires that each glass tube be heated and softened to the same degree. Since the glass tubes have to enter and exit the bending furnace frequently during the heating process, the temperature of the furnace changes greatly, and the constant temperature requirements are difficult to control, and the glass tube itself has diameter and wall thickness dimensions. Error, using the timing heating process, although the heating time of the glass tube in the bending furnace is the same, but affected by the above factors, the degree of softening of the glass tube is different. The influence of different degrees of heating and softening of glass tubes and the influence of ambient temperature during bending will result in different sizes of blown glass tubes. These reasons lead to a low pass rate during automatic bending and the machine cannot be used.

With the development of society, the manual operation of the spiral energy-saving lamp tube bending process can no longer meet the needs of production. Not only is the labor intensity of the workers high, it is not conducive to safe production, and the production efficiency is very low. Therefore, the solution to the automatic manufacturing of the spiral energy-saving lamp tube The automatic pipe bending process is of great significance

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