RU2119862C1 - Coiled and bar metal shotblasting apparatus - Google Patents

Abstract

FIELD: metallurgy. SUBSTANCE: shotblasting apparatus for surface treatment of coiled or bar metal has shot accumulating and consuming unit, working chambers with shotblasting devices, shot circulation system with screw conveyor shaft and elevator with drive and driven shafts which are connected in series, separator, mechanism for feeding material to be treated into chambers and device for controlling rotational speed of elevator driven shaft and screw conveyor shaft. Rotational speed controlling device has electronic unit and sensors mounted on mentioned shafts. Shot accumulating and consuming unit has hopper. Apparatus may be used in conjunction with drawing mill in lines for preparing metal for cold upset. EFFECT: enhanced reliability in operation, improved quality of treated coiled or bar metal and wider operational capabilities. 2 cl, 1 dwg

Description

 The invention relates to surface treatment with a fraction of rebellious and rod metal and can be used in mechanical engineering.

 A known installation for processing parts by shot containing a working chamber with a shot blasting apparatus, a shot blasting system, including a screw conveyor, an elevator, a separator, a storage and consumable unit, consisting of two bunkers - a consumable and storage, and the latter is connected to the separator and the elevator by channels, and connected to a screw conveyor, while the screw conveyor is connected to the elevator with the possibility of dispensing a stream of fractions (A.S. USSR N 663572, class B 24 C 9/00, 1977).

 A disadvantage of the known installation is its low reliability due to the lack of consistency in the movement of the shot over time and the possible breakage of the elevator belt from its blockage, which can occur at the beginning of the cycle when the shot stream is applied.

 Closest to the proposed one is a shot blasting machine containing work chambers with shot blasting machines, a shot blasting system, including a screw conveyor shaft, an elevator with drive and driven shafts connected in series, a separator and a storage-consumable unit. (A.S. USSR N 1556884, class B 24 C 9/00, 3/02, 1987).

 This installation has low reliability when it is used for continuous processing of rebellious or bar metal, since a stop or inconsistency in the operation of one of the transporting mechanisms will lead to the formation of blockages, the cessation of the supply of fractions and the exit of raw metal. In addition, it is difficult to use the installation complete with drawing mills.

 The invention solves the problem of creating a high-performance installation for processing rebellious or bar metal with shots, which has improved performance characteristics.

 The technical result from the use of the invention is expressed in increasing the reliability of the installation in operation, in ensuring good quality of the processed rebellious or bar metal, and the possibility of using it in conjunction with drawing mills in the metal preparation lines for cold heading.

 The specified technical result is achieved by the fact that the installation for surface treatment of metal with shots, containing working chambers with shot blasting machines, a shot blasting system, including a screw conveyor shaft connected in series, an elevator with drive and driven shafts, a separator and a storage-consumable unit according to the invention is equipped with a mechanism feeding the processed material into the chambers and the associated means of controlling the rotation speed of the driven shaft of the elevator and the shaft of the screw conveyor, consisting them from the electronic unit and mounted on the shafts of these sensors. In this case, the storage and consumable unit consists of only one hopper.

 During normal operation of the installation, the screw conveyor and elevator blockage does not occur, since their throughput is calculated depending on the maximum productivity of shot blasting machines.

 In the case of slowing down the rotation or stopping of the shafts caused by stretching of the belt, emergency engine failure and other malfunctions, the control means simultaneously shuts off the shot blasting system and the metal feed mechanism, which eliminates blockages of the shot and the exit of unprocessed metal sections.

 Due to the interconnection of the control means and the revolt metal supply mechanism, the installation can consistently work together with drawing mills.

 This design allows you to abandon the second hopper (cumulative) in the storage and expenditure unit, since the use of control in the shot blasting system provides significantly greater reliability than the use of the storage hopper of any design.

 The proposed installation for the processing of riot and bar metal is illustrated in the drawing.

 The installation contains one or more working chambers 1 with shot blasting machines 2, a shot blasting system, including a screw conveyor 3 connected in series, located under the working chambers, an elevator 4 with a drive shaft 5 and a driven shaft 6, a separator 7 with a tank for collecting large scale particles 8, a storage-consumable unit, which consists of one hopper 9 with a cutter-dispenser 10 and is connected to the shot blasting devices by nozzles 11. The installation is equipped with a feed mechanism of the processed material and means of control A rotation speed of the driven shaft 6 and the elevator shaft 12 of the screw conveyor, which consists of the electronic unit 13 and mounted on these shafts 14. The sensor means associated with the control mechanism for supplying the treated metal in the working chamber. The volume of the hopper 9 is the sum of the fraction that is constantly located during operation in the shot blast chutes, on the screw conveyor and elevator, and the fraction necessary for the continuous supply of shot blasters at their maximum capacity.

 Installation works as follows.

 The hopper 9 is preliminarily loaded with shots, then the processed bar is passed through the working chambers 1, shot blasting machines 2 are started, the screw conveyor 3 and the elevator 4 with the drive shaft 5 and driven shaft 6 are turned on. Cutter-batcher 10 opens the shot flow from the hopper through the shotgun nozzles 11 devices and include a riot metal feed mechanism. The fraction from the working chambers is poured into a screw conveyor, transported to the elevator, fed by the elevator to the separator 7, where it is cleaned of processing products (scale) that remain in the tank 8. Then the fraction falls back into the hopper and then the path is repeated. Fraction during installation operation circulates in a closed loop. When one of the transporting elements stops or is inconsistent, sensors 14 of the monitoring device installed on the driven shaft 6 of the elevator and the shaft 12 of the screw conveyor are triggered, and the shotgun system and the metal feed mechanism are turned off via the electronic unit 13.

 The proposed installation has high performance and successfully works complete with a drawing mill in the line for preparing metal for cold heading.

Claims (2)

 1. Installation for processing rebellious or rod metal with shots, containing working chambers with shot blasting machines, a shot blasting system, including a screw conveyor shaft connected in series, an elevator with drive and driven shafts, a separator and a storage-consumable unit, characterized in that the installation is equipped with the feed mechanism of the processed material into the chambers and the associated means of controlling the rotation speed of the driven shaft of the elevator and the shaft of the screw conveyor, consisting of an electronic unit and sensors mounted on said shafts.  2. Installation according to claim 1, characterized in that the storage-expendable unit is made in the form of a single hopper.