RU192909U1 - Tool for fixing cylindrical parts - Google Patents

Abstract

The utility model relates to the field of mechanical engineering and is used in the processing of cylinder liners, and can also be used for processing other products of a cylindrical shape. The use of devices for securing cylinder liners on a lathe will allow deformation-free processing of several standard sizes of cylinder liners in turn and can be used in agriculture during their restoration. 1 ill.

Description

The utility model relates to devices used in the metalworking process, and can be used in various branches of mechanical engineering, for example, during restoration work in the repair industry for fixing cylindrical hollow and solid parts of various diameters for their subsequent processing.

A device is known for performing finish processing of the cylinder liner of an internal combustion engine cylinder [RU 2482951 C1, B24B 1/00 (2006.01), B24B 33/02 (2006.01), B24B 33/08 (2006.01), 05.27.2013]. The device consists of a removable part of the device for the sleeve, which is processed by mechanical and non-mechanical operations. When using mechanical operations, the sleeve is installed in the stationary part. At the removable part of the device, the axles are effortlessly inserted into asymmetric grooves that limit the rotation of the sleeve from the cutting force of the tool. When honing and boring, the liner cavity and tool are centered on asymmetric grooves, which give an additional degree of freedom. The surface of the cutting tool penetrates into the cavity to a certain depth when cutting the oil-conducting mesh. The predetermined depth, roughness of the oil-conducting mesh is provided by the surface of the frame, which is in contact with the plane, thereby smoothing it and reducing the vibration of the tool. When leaving the cavity of the cutting element, the surface, being a guide, continues to contact it. With the resumption of contact of the cavity with the working surface of the cutting element, the depth of the oil-conducting mesh at the ends of the liner does not increase.

The disadvantage of this device is a narrow range of applications, due to the specifics of the operation of honing parts.

Known expandable mandrel [RU 2519708 C1, B23B 31/40 (2006.01), 06/20/2014] containing a spindle with an outer conical surface, a removable elastic element in the form of a sleeve with slots designed to move relative to the conical surface in the axial direction and fixed by fixing elements , which is equipped with a washer rigidly mounted on the spindle. In this case, the sleeve is made of friction material and has longitudinal slots extending to different ends and alternately alternating with each other, the external profile of the sleeve is identical to the internal profile of the bore hole, and the sleeve can be moved axially when installing the part.

The disadvantage of this device is the possibility of its use exclusively for fixing conical parts, as well as the need for strict observance of the friction moment, which depends on the safety factor and the total moment of resistance of the cutting forces.

Closest to the claimed device for securing cylinder liners is a device for securing a hollow cylindrical part [RU 2320458 C2, B23B 31/40 (2006.01), 03/27/2008], comprising a housing with a central hole for accommodating a set of additional nodes and hollow cylindrical parts (prototype of the claimed utility model). A thrust is installed in the central hole, on which a quick-release clip is installed. The thrust is made in the form of annular grooves of a certain diameter, mating with the diameter of the thrust with conical sections. The ends of the plungers are made in the form of a spherical shape and this provides point contact with the thrust surface and the inner surface of the centered part.

The disadvantage of this device is the complicated design, consisting of small components, as well as the implementation of the clamp by means of springs and spherical plungers. In addition, a significant drawback is the requirement for high precision manufacturing of spare plungers and the diameter of the rod, since the sum of the two lengths of the plunger and the diameter of the rod is equal to the internal diameter of the part and the accuracy of centering the part in the device depends on this.

The objective of the utility model is to expand the scope of application of the device for fixing cylinder liners and to ensure strain-free centering and fastening of a hollow or solid cylindrical part for processing, improving the quality of processing the diameter of the part.

A device for securing cylinder liners consists of a housing 1 formed by joining two symmetrical detachable segments, in which two coaxial connecting bolt holes are made 2. Each segment has a working part, a gripper 3, made in a three-stage shape in longitudinal section and made in the form of an ellipse in a cross section perpendicular to the axis of the central hole of the housing providing for deformation-free fastening of cylindrical parts of various diameters. Semi-cylindrical shanks 4 at the ends of each segment and two square grooves 5 in the middle of each segment designed to connect the segments by tightening the hinged bolts.

The proposed solution provides an extension of the scope due to the possibility of its quick and easy readjustment during use.

The essence of the proposed utility model is illustrated in the drawing:

FIG. 1 is a general view of a utility model.

The device for securing cylinder liners consists of two main symmetrical parts 1, in which one shank 4 is made, two coaxial through bolt connections 2, with rectangular platforms 5, and also have the ability to select diameters of a certain range, by means of the working part of the device, two grippers 3 made in the form of an ellipse in a closed state.

A device for securing cylinder liners works as follows.

Two folding bolts are screwed into a rectangular platform 5 of one of the segments, thus connecting without contact both segments of the device. The grips 3 place the part to be processed further, after which the folding bolts are symmetrically held up until the workpiece is securely fixed. Due to the semi-ellipsoidal shape of the grippers, the part is self-centering relative to the axis of rotation. Then, the shanks 4 of both segments 1 are fixed in the cam mechanism of the machine.

The use of devices for fixing cylinder liners on a lathe will allow deformation-free processing of several standard sizes of cylinder liners in turn and can be used in agriculture during their restoration.

This technical solution will expand the scope of application of devices for fixing cylinder liners and provide strain-free centering and fastening of a hollow or solid cylindrical part for processing, improving the quality of processing the diameter of the part.

Information sources

1. RU 2482951 C1, V24V 1/00 (2006.01), V24V 33/02 (2006.01), V24V 33/08 (2006.01), 05.27.2013. Device for finishing the cavity of the cylinder liner of an internal combustion engine. Dronov Evgeny Anatolievich, Batazov Viktor Nikolaevich, Kobyashev Nikolay Vasilievich, Krasnov Yuri Alekseevich, Filipov Evgeny Sergeevich.

2. RU 2519708 C1, B23B 31/40 (2006.01), 06/20/2014. Expandable mandrel. Zobnin Victor Ivanovich, Kiselev Andrey Vasilievich.

3. RU 2320458 C2, B23B 31/40 (2006.01), 03/27/2008. A device for fixing a hollow cylindrical part. Mitin Anatoly Semenovich, Piskunova Olga Konstantinovna.

Claims (1)

A device for fixing cylindrical parts, comprising a housing with a central hole for accommodating a fixed part in it, characterized in that the housing is made in the form of two symmetrical detachable segments, each of which has a three-stage shape, presented in the form of a half-cylindrical shank, the middle part having platforms with two through coaxial holes in them for a bolted connection of both segments, and the working area in which the said central hole is located, limited to the grips and made on the segments with the possibility of formation in the connected state of the segments of the shape of an ellipse in a section perpendicular to the axis of the housing.

Images