RU182069U1 - TOOL FOR GRINDING CYLINDER PARTS - Google Patents

Abstract

A device for external grinding is proposed, consisting of a mandrel, a clamping unit, a workpiece, which, according to the claimed technical solution, contains a wings. The link is mounted in a mandrel to which a guide is mounted on which the clamping unit is mounted. On the wings, a groove A _{1 is made} , intended for fixing on it a movable centering device consisting of a housing, in the opening of which a sleeve is placed. A movable center located in the movable centering device is installed in the sleeve. On the end surfaces of the workpiece, center holes are made, along which the movable center, which is part of the movable centering device located on the wings and fixed with a screw in the groove A ₁ , and the clamping unit, respectively, are based. The clamping center and the moving center are located on the same O-O axis with a deviation of not more than 1 μm. 3 ill.

Description

The proposed utility model relates to mechanical engineering, in particular to the processing of various surfaces of products by means of a grinding tool.

A device for external grinding of products is known [RU No. 148856 dated 12/20/2014], which has a mandrel on which a link is fixed with a movable block, with a holder located on it, on which the workpiece is fixed, and the link is made with through grooves , one of which is designed for attaching the wings to the mandrel, and the other for attaching the movable unit. The utility model relates to mechanical engineering, in particular to the processing of various surfaces of products by means of a grinding tool. The inventive design provides: the possibility of fixing the workpiece for grinding radius surfaces, including carbide, with the ability to quickly replace the workpiece after grinding

Closest to the claimed utility model is a device for external grinding [RU No. 147616 of 11/10/2014] products. A tool for external grinding of the radiused surfaces of parts containing a mandrel with a disk mounted on it, on which a clamping block with a workpiece is fixed, the disk being made with upper and lower slots for fastening the clamping block while providing a reference grinding radius for the workpiece, and the clamping block represents a rectangular case, one end of which is made with a radius R ₁ with a center located on the opposite side of the clamping block, and on the clamping block at an angle of 45 ° to the surface is formed with a 90 ° angle to accommodate the workpiece, and at least two through holes are made on the formed surface at an angle of 45 ° to the base for fastening the workpiece to the clamping unit by pressing, while the clamping block with the workpiece is fixed to the disk in the aforementioned grooves with a reference radius for grinding the workpiece, and the distance R ₂ from the end face of the clamping unit, made with a radius R ₁ to the center of the disk, is determined by the formula:

R ₂ ≤Rl ₃ ,

where R is the grinding radius of the workpiece;

l ₃ - the distance between the machined surface of the part and the end face of the clamping unit, made radius R ₁ .

The disadvantages of the described devices for external grinding is the inability to grind cylindrical parts and to ensure quick replacement of the product after processing.

The objective of the proposed technical solution is to remedy these shortcomings, namely the development of devices that can grind cylindrical parts using a grinding tool and ensure quick replacement of the product after processing.

The specified technical result is achieved in that the device for external grinding, consisting of a mandrel, a clamping unit and a workpiece contains a link, which is installed in the mandrel, to which a guide is fixed, on which the clamping unit is mounted, and a groove A ₁ , designed for fixing on it a movable centering device, consisting of a housing in the hole of which a sleeve is placed in which a movable center located in the movable centering device is mounted on the end surfaces of the workpiece formed pivot hole which are based movable center part of the movable centering device disposed on the rocker and the fixed screw in the slot A _1, and the clamping unit, respectively, the pressing center and a movable center located on the same axis O-O, a tolerance of not more than 1 μm is allowed.

In FIG. 1 shows a General view of the device.

In FIG. 2 shows a clamping unit.

In FIG. 3 shows a movable centering device on the wings.

The device for external grinding consists of a mandrel 1, a workpiece 2, a clamping unit 3, a backstage 4, which is installed in the mandrel 1, in the upper part of which a guide is mounted on which the clamping unit 3. The clamping block 3 (Fig. 2) contains a clamping the center 11, made in the form of a shaft installed in the guide 5 and fixed by the sleeve 7, a handle 10 is installed in the upper part of the clamping center 11, designed to transmit rotation to the clamping center, and in the lower part of the clamping center 11, on the axis of rotation, a cone at an angle of 60 °, designed to fix the workpiece 2. A thrust metal ring 13 is mounted above the cone, against which a spring 12 rests, designed to fix the workpiece 2. The spring 12 is selected according to GOST 18793-80, and the metal thrust ring 13 is selected according to GOST 13942-86.

The workpiece 2, on the end surfaces of which centering holes are made, is fixed between the clamping center 11 and the movable centering device 6 (Fig. 3), which consists of a housing 8 and installed in the housing of the moving center 9 fixed in the sleeve 7, acting as a sliding bearing when rotation of the movable center 9. The clamping center 11 and the movable center 9 are located on the same O-O axis, with a deviation from the axis of not more than 1 μm to ensure the cylindrical shape of the processed plate.

The housing 8 is a rectangular block with a through hole in the form of a square, designed to fix the position of the movable centering device 6 on the wings 4, on which a groove A _{1 is made} , designed to be fixed on it with the screw of the movable centering device 6.

A device for grinding cylindrical plates works as follows.

Initially, the length of the workpiece is determined - to adjust the position of the movable centering device 6 on the wings 4.

In accordance with the dimensions of the workpiece by the centers of the workpiece, the part is fixed by the cones of the clamping center 11 and the movable center 9 of the movable centering device 6 (Fig. 1) of the clamping unit 3, then raised by the handle 10, the workpiece 2 is mounted on the movable center 9, previously having installed the clamping unit 3 on the wings in the centering hole and gently release the handle so that in the opposite centering hole of the workpiece 2, the clamping center 11 with a deviation from the axis O-O between the pressing center 11 and the moving center 9 is not more than 1 μm.

Turn on the machine. Grind the workpiece to a predetermined length by evenly rotating the part manually using the handle 10. After the grinding process is carried out using the handle 10, the clamping unit 3 is lifted and the machined part 2 is removed from the moving center 9. The device is ready for further grinding of the next workpiece.

             The inventive design allows you to grind cylindrical parts using a grinding tool and provides quick replacement of the product after processing.

Claims (1)

A tool for external grinding of parts comprising a mandrel and a clamping unit for a workpiece, characterized in that it is equipped with a link mounted on the mandrel with a guide fixed to it, in which a clamping unit having a clamping center is mounted, and a movable centering device located on the link with the possibility of fixing it by screws in the slot a ₁ scenes and configured as a housing with an opening, which accommodates a sleeve mounted therein a movable center, wherein said presser and a movable centers positioned on the same axis O-O ensuring tolerance not greater than 1 micron and with the possibility of deployment of pivot holes on the end surfaces of the workpiece.

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