SU1310185A1 - Shot-peening apparatus - Google Patents

Abstract

The invention relates to machining, in particular to devices for shot blasting of surfaces. The aim of the invention is to expand technological capabilities by additionally providing blown with clean compressed air with automatic switching of operating modes. For this purpose, a spring-loaded slide valve 17 with a central hole is located in the shot-blasting apparatus inside the mixer 6. The mixer is connected by means of a pressure pneumatic line with a shut-off valve 23 of the blowing-exhaust of the lower chamber 5. The device is equipped with an electro-electric meter 25 connected with the pneumatic line with the mixer and the lower chamber. 1 il. P

Description

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The invention relates to machining, in particular to devices for blasting surfaces.

The purpose of the invention is the expansion of technological capabilities by additionally providing purging with clean compressed air with automatic switching of operating modes.

The drawing shows a shot blasting apparatus, a general view.

The device contains a storage device 1 with a loading device 2 and an electromagnetic shutter 3, the top 4 and bottom 5 chambers and the mixer 6. The drive 1, the top 4 and bottom 5 chambers are interconnected by bypass valves 7 and 8, driven by pneumatic cylinders 9 and 10 controlled electric air distributors 11 and 12.

Sensors 13 and 14 are mounted on the upper wall of the accumulator 1 and on the bottom wall of the lower chamber 5, controlling the shot level, made in the form of inductive sensitive elements and protected from direct shot hit by the flaps 15 and 16.

The mixer 6 is equipped with a spring-loaded gate valve 17, mating with the inner cylindrical cavity 18 and the cone-shaped saddle 19 of the mixer 6. The valve has a central hole 20 connected to a separate electric air distributor 21.

The lower 5 and upper 4 chambers are connected by pneumatic lines to shut-off valves 22 and 23 of blowing-exhaust and electromagnetic control and are equipped with electromanometers 24 and 25. In addition, the shut-off valve 23 is connected by pneumatic line to the internal cavity 18 of the mixer 6, which serves to create back pressure on the spring-loaded valve.

Electric air distributors 11, 12, and 21 are connected directly to the inlet of the pneumatic system and the shot blasting apparatus, and shut-off valves 22 and 23 of injection-exhaust - through the receiver 26. The device is equipped with a time relay (not shown) to control the duration of the fraction transfer.

The device works as follows.

The fraction from the lower chamber 5 enters the mixer 6 where it is picked up

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compressed air. The spool 17 is under the action of compressed air supplied to the cavity 18 of the mixer 6, retracted, opening the access of the fraction to the side of the cone-shaped seat 19, where it is picked up by the compressed air, then coming along the sleeve to the shot blasting head (not shown).

As the fraction from the lower chamber 5 is consumed, the sensor 14 controls the fraction level, which sends a command to the solenoid distributor 12, which in turn feeds air into the pneumatic cylinder 10,

bypass valve 8. The latter opens, and the shot from the upper chamber 4 is poured into the lower chamber 5. The duration of the overflow is monitored by a time relay, which sends a command to close the valve 8 and to the solenoid 22 of the blow-off exhaust valve.

After the air is released from the upper chamber 4, the electromagnet 24 sends a command to the electromagnet of the air distributor 11, which opens air to the pneumatic cylinder 9. The valve 7 is unlocked and the shot from accumulator 1 is transferred to the upper chamber 4 of the apparatus.

After the required pressure is created in the upper chamber 4, the electro-manometer 24 triggers, which gives the command to turn on the electromagnetic shutter 3. The fraction from the charging device 2 is transferred to the accumulator 1. After the accumulator is filled with 1 fraction, the level sensor 13 is triggered to the required level and the command to close the shutter 3 This completes the casting and ejection cycle.

Depending on the duration of the cleaning and the required quality of cleaning, a certain number of shot peremes cycles are carried out. If, after cleaning, a purge (blowing) of the product being cleaned with clean compressed air is required, then a signal is sent to the solenoid of the stop valve 23 for blowing through which air from the lower chamber 5 and cavity 18 of the mixer 6 is vented to the atmosphere. In this case, the valve 17 is pressed by the action of the spring to the cone-shaped saddle 19, interrupting the flow of fraction into the internal cavity of the mixer 6. When the pressure is restored, 313

In the cavity 18 and the lower chamber 5, the process of dispensing the shot is resumed.

The presence in the accumulator 1 and the lower chamber 5 of the protective flaps 15 and 16 contributes to the protection of the sensors 13 and 14 of the level from direct shot hit. The presence of the receiver 26 and high-speed shut-off valves 22 and 23 blowing-exhaust contributes to the rapid filling of the lower 5 and upper 4 chambers with compressed air, as well as its discharge into the atmosphere.

Compared with the known structures, in the proposed shot blasting apparatus, the installation of inductive sensitive sensors to control the fraction level contributes to its uniform output from the mixer, the optimal loading of the chambers and accumulator by shot, which increases the productivity of the device. The supply of the mixer with a spring-loaded gate valve with a supply of compressed air provides the possibility of blowing (blowing) products and elements of the apparatus with clean compressed air with automatic resumption of shot, i.e. The cleaning process is carried out.

Editor I. Casarda Order 1853/13

Compiled by N. Finn

Tehred L.Oleynik Proofreader M. Pojo

Circulation 716 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

01854

Claims (1)

Invention Formula Shot blasting machine containing a storage device with a boot device J and shutter, upper and lower chambers, interconnected pneumatically controlled by-pass valves - Lee, shut-off valves of the blowing-out of the upper and lower chambers, mixer with inlet O bore and nozzle associated with an air distributor control system including a device for controlling the fraction filling level, in order to expand technological capabilities by additionally ensuring the purging with pure compressed air with automatic switching of operating modes central hole located inside the mixer with the possibility of overlapping them with the inlet of the mixer connected by means of pneumatic injection yes with shut-off valve 5 blow-exhaust of the lower chambers b, as well as a control electromanometer connected by a pneumatic line with a mixer and a lower chamber.