Shot blasting machine refers to the casting equipment that uses high-speed shot blasting machine to clean or strengthen the surface of castings. The shot blasting machine can perform sand blasting, core removal and cleaning on castings at the same time. Some places are also called sanding machines and sandblasting machines.

The shot blasting machine is mainly composed of shot blasting machine, shot blasting room, purging room, shot blasting circulation system, dust removal system, guide roller, support roller, protection roller, sealing curtain, sealing roller, etc.

Shot blasting machine, also known as shot blasting machine, can be divided into shot blasting machine, hook shot blasting machine Crawler type shot blasting machine Etc.

Maintenance points of shot blasting machine:

(1) Directional sleeve Angle adjustment of directional opening: after feeding, the prepared casting shall be shot blasted, and the direction of directional sleeve shall be slightly adjusted to each surface of the casting according to the surface condition of the casting. After the best Z direction is determined through trial production, mark it with a marking pen.

(2) Adjustment of particle separator: first check whether the adjustable ram moves flexibly, then carry out load commissioning to make particles flow continuously in the separator, and check whether particles fall as a flow curtain, otherwise repeatedly adjust the ram until particles fall as a flow curtain.

(3) The wear-resisting lining plate and blade of the interior wall of the shot blasting chamber are easy to wear, so they should be checked and replaced regularly.

(4) Shot distributing wheel If the wear is more than 15mm, it should be replaced in time. If it is used continuously, the radial scattering angle of the projectile will increase, which will accelerate the wear of the shield and reduce the cleaning effect.

(5) There is a deep groove inside the directional sleeve or the directional opening of the directional sleeve is worn about 10mm, which should be replaced.

Shot blasting machine is a kind of equipment that uses shot blasting machine to cast high-speed shot to clean the surface of castings. Its process is very complicated. Next, the shot blasting machine manufacturer will introduce the overall process:

1、 Upper pendant.

The rear height of each pendant is ≤ 1400mm, the width direction of the pendant of the shot blasting machine manufacturer is round, and the rear diameter of the pendant is controlled at φ Within 800mm, no more than φ 900mm。 The specific requirements are as follows.

(1) The spreader is designed to be installed in the width direction as an odd number to ensure that the ball particles are thrown into the opposite workpiece through the gap between the two workpieces; The height of the spreader can be designed in multiple layers according to the specifications of the parts. We use 2-3 layers of spreaders; The number of hooks in each layer is not too wide, and 5.7 layer hooks 2 are used according to our company's part specifications; A secondary hook can be added at the main hook side to install small parts.

(2) During installation, try to use sleeve hanging, that is, try to hang as many as possible without exceeding the larger passing size, and the workpiece spacing is greater than 30mm. If large pieces are hung in the upper row, medium pieces or small pieces can be hung in the lower row.

(3) Hanger maintenance. As the pendant is a vulnerable part, its wear will become greater and greater with the progress of shot blasting, so the pendant should be checked before installation, and it should be replaced in time if deformation or serious wear is found. The maintenance personnel shall carry out weekly inspection and timely repair in case of serious deformation or wear to ensure no falling off.

2、 Degrease.

The purpose of degreasing is to remove the oil stain on the surface of the workpiece. After shot blasting, the workpieces attached to the shot blasting will form sludge, which will affect the coating quality. At the same time, the oil stain will block the dust removal and filtration, leading to the shortening of the service life of the filtration. In serious cases, the dedusting equipment will be blocked, resulting in scrapping of dedusting equipment. The heating and spraying treatment system is used for the degreasing of the shot blasting line in the truck factory. The process requirement is: the temperature is 40~70 ℃; The concentration of bath solution is 1-5 points. In the production process, it should be adjusted in time to ensure that the range of process requirements is met. The beam shot blasting line should also control the spraying pressure within the range of 0.2~0.4 MPa. If it is too low, it is easy to clean, and if it is too high, it is easy to knock down the workpiece from the hanging.

Cleaning and maintenance: change the water in the degreasing tank once a week to thoroughly clean the sediment; Clean the filter screen every 2 hours; The nozzle is adjusted once a day, with accurate direction and no blockage; The pipeline shall be cleaned twice a month.

3、 Water washing.

The washing equipment is similar to degreasing, and also adopts the heating and spraying treatment system, but only the temperature (40~70 ℃) is controlled, and the concentration does not need to be controlled. Other management is the same as degreasing.

4、 Drain.

The longitudinal beam shot blasting line uses compressed air to blow water for forced drainage, and the beam shot blasting line uses rotating centrifugal automatic drainage control. The floating water on the workpiece surface is required to be drained basically to reduce the drying pressure and save energy.

5、 Dry.

The drying temperature should be 70~120 ℃ to ensure that the residual water on the surface of the workpiece is clean. The management of draining and drying is to remove moisture from the surface of the workpiece. The consequence of the workpiece with water entering the shot blasting machine is more serious than that of the workpiece with oil. First, the workpiece with water is easy to rust after shot blasting, which affects the quality of coating; Secondly, water entering the shot blasting machine will lead to rust and agglomeration of steel shot and dust produced by shot blasting, resulting in blockage of the conveying system and dust removal system of the shot blasting machine, and will be scrapped in serious cases. Therefore, during the production process, it should be ensured that the moisture on the surface of the workpiece is removed.