SU441138A1 - The method for determining the active torch zone of a shot-blasting unit - Google Patents

Description

one

The invention relates to the cleaning of products from scale, rust, foundry earth, etc.

There is a known method of aiming the fraction torch but not on the surface of the product, in which the active fraction torch zone is determined rather tentatively by the sequential nodgling method, by repeated development of the torch contour, since the shot blasting units do not have devices indicating the actual active fraction torch zone.

The proposed method differs from the known one in order to improve the accuracy of determining the active torch zone in the direction perpendicular to the plane of the plume contour, create an electric field with a constant high potential gradient, the value of which is chosen corresponding to the potential gradient of the penetrating discharge in the active fraction stream but the occurrence of piercing bits fixed by the device is judged on the active flame zone of the fraction.

Pa figs. 1 schematically shows a shot-blasting apparatus; in fig. 2 is an electrical circuit of a high-voltage rectifying device.

After installation in the shot-blasting apparatus 1 of new blades 2, which often change in operation, turn on the shot-blasting annarat and supply the nominal fraction to

a unit of time to the shot blast machine. When the shot-blasters reach the reference flow rate of the shot using the high-voltage rectifying device 3 in the direction perpendicular to the plane of the shot fraction 4 of the shot-blasting apparatus, an electric field is created with a constant high gradient of the notation, the value of which is chosen such that

Punching sparks appear, recorded by the device in the active note of flying doses of electrically conductive fractions deployed in the LPNPP (parallel to the ends of the shot-blast blades), and slowly do not interfere with the electric field with a high potential gradient relative to the flame contour along arrow L (see Fig. 2).

At the time of the electric zero crossing of the active zone of the torch 5,

the spark circuit of the high voltage circuit, and

The device indicates current flow.

Fix the location where it started

microammeter arrow deflection 6.

Further movement of the electric

the floor in the zone of the active fraction torch is accompanied by a deviation of the arrow until the electric field leaves the active torch. This is the location of the electric field and the end of the active torch zone.

also fixed.

P r with d. M e t II :: about b r with t and and

The method of determining the active torch zone of a shot-blasting unit by hovering it along the spot on the product surface, characterized in that, in order to increase} and the accuracy of determining the active torch zone in the direction opposite to

planes of the plume contour, create an e.heggric field with a constant high potential gradient, the value of which is chosen corresponding to the gradient of the potential of the penetrating discharge in the active fraction flow, and the occurrence of the penetrating discharge fixed by the device is judged on the zone of the active fraction of the fraction.

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