SU1481410A1 - Cutting unit of machine for winning construction stone - Google Patents

Abstract

The invention relates to the mining industry. The purpose of the invention is to reduce the energy intensity of the process of extraction of building stone and reduce the loss of raw materials by reducing the width of the cut. For this, the hub 2 mounted on the drive shaft 1 is made with curved guide channels 4. The longitudinal axis of each channel 4 is located in a plane passing through the longitudinal axis of symmetry of the hub 2. The cutting element of the working member is made in the form of elastic metal rods 3 with an abrasive coating. Each rod 3 is located in the corresponding channel 4 of the hub 2. On the shaft 1 with the possibility of longitudinal movement along it through the slotted slots 5 made on the shaft 1, a sleeve 6 with slots is mounted. The rods 3 at one end rigidly mounted on the sleeve 6. The inlet of the channels 4 are located on the end of the hub 2, and the output on the side surface. The position of the sleeve 6 determines the outreach of the rods 3 from the channels 4 of the hub 2. For a sufficient speed of rotation of the shaft 1, the necessary centrifugal forces are created. As the hub 6 approaches the hub 2, the diameter of the elastic cutting disk formed by the set of rods 3 increases. 1 hp f-ly, 2 ill.

Description

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The invention relates to the mining industry and can be used in the working bodies of machines for the extraction of building stone.

The purpose of the invention is to reduce the energy intensity of the process of extraction of building stone and reduce the loss of raw materials by reducing the width of the cut.

Figure 1 shows a tool with a device for changing the overhang of the cutting tool; 2 shows a cutting tool with elastic metal rods, end view of a hub.

The working body of the mining machine, the building stone, includes a drive shaft 1 on which the hub 2 is fixed. The cutting tool is made in the form of elastic metal rods 3 located in the curved guide channels 4 of the hub 2. Elastic metal rods 3 are made with diamond chips or other abrasive coating. The drive shaft 1 has splined grooves 5 in which a device for changing the overhang of the cutting tool is moved, made in the form of a sleeve 6 with splines. On the sleeve 6 by means of bolts 7, the ends of two or four elastic metal rods 3 are rigidly fixed. The sleeve 6 is moved along the shaft axis by a hydraulic cylinder rod or mechanically (not shown). In order to achieve sufficient flexibility of metal rods, abrasive coating of them is carried out,

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imposing not a continuous layer, but only on separate sites. This allows the gaps between the coating to perform the functions of flexible links.

The working body works as follows.

For a sufficient rotational speed of the working shaft 1, the centrifugal forces, acting on the rods 3, tend to pull them out of the channels 4 and hold them in the radial direction. In this case, the entire set of abrasive rods 3 forms an elastic cutting disk (figure 2). The diameter of this disk depends on the position of the sleeve 6, since this position determines the departure of the cutting tool from the channels of the hub 2,

For the rear trimming of the stone with elastic discs, it is sufficient to make a technological niche with a diameter of only equal to the diameter of the hub 2. Then, by inserting the hub 2 into the niche, give the shaft 1 sufficient revolutions to create the necessary centrifugal forces. As the sleeve 6 approaches the hub 2, the diameter of the elastic disk increases.

The possible contact of the rods 3 with each other or the breakage of several of them does not disrupt the operation of the organ and does not create an emergency.

Claims (2)

1. The working body of the machine for the extraction of building stone, mainly of soft rocks, including a drive shaft on which a hub, a cutting tool and a device for changing the outreach of the cutting tool, characterized in that, in order to reduce the energy intensity of the process of extracting building stone and reducing raw material losses by reducing the width of the kerf, the hub is made with curvilinear guide channels, the longitudinal axis of symmetry of each of which is located in the plane passing through the longitudinal axis of symmetry of the hub, and the cutting tool is made j in the form of elastic metal rods, each which is located in the corresponding guide channel of the hub, while the device for Changes in the overhang of the cutting tool are made in the form of a sleeve with slots mounted on the drive shaft with the possibility of longitudinal movement along the latter by spline grooves made on the drive shaft, and elastic metal rods are rigidly fixed at one end to the spline sleeve, with the inlet holes of the curvilinear channels located at the end of the hub, and the outlets - on the side surface. 2. A working member according to claim 1, characterized in that the elastic metal rods are made with an abrasive coating.