SU1289667A1 - Vibration device for screwing and unscrewing threaded joints - Google Patents

Abstract

This invention relates to vibratory devices for screwing and unscrewing threaded connections. The aim of the invention is to reduce vibration, which is achieved by eliminating axial oscillations and, therefore, colliding the working head with threaded joints. The vibrating device for screwing and unscrewing the threaded connections includes a housing 1, a vibrator connected to it, executed in the form of a piezoelectric cylinder 2 and a working head 3. The piezoelectric cylinder 2 is filled in the form of sector elements 4 interacting with and electrically isolated from each other and the operating head 3 is made of an elastic material for interacting with the element 5 of the threaded joint. In various embodiments of the device, piezoelectric sector elements 4 can be connected with the end face of the housing I by one end, and with the working head 3 with the other end. In another version, the sector elements 4 are connected to the housing 1 by an external cylindrical surface, and internal or vice versa. 2 hp ff, 4 ill. with S (L th 00 so a O5 vi tjffus.f

Description

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- The invention relates to vibratory devices for screwing and unscrewing threaded connections and can be used during assembly and assembly work, especially in the absence of support for the worker.

The aim of the invention is to reduce vibration, which is achieved by eliminating axial oscillations and, therefore, colliding the working head with threaded joints, and the excitation of several traveling deformation waves along the device axis simultaneously on the surface of the working head leads to an almost complete elimination of radially directed forces and, hence the radial vibrations of the hull.

Fig. 1 shows a device, the vibrator of which is connected to one end of the housing with an end face, another end with a working head, option; 2, a device whose vibrator with an external cylindrical surface is connected with a housing, and an internal one with a working head, an option; on fig.Z - section aa in figure 2; Fig. 4 shows a device, the vibrator of which is connected by an inner cylindrical surface with a housing, and an outer one with a working head, an option.

The vibrating device for screwing and unscrewing the threaded connections includes a housing 1, a vibrator connected to it, made in the form of a piezoelectric cylinder 2 and a working head 3, the piezoelectric cylinder 2 is made in the form of sector elements 4 interacting with each other and electrically isolated from each other The working head 3 is made of an elastic material to interact with the element 5 of the threaded joint.

In the device (Fig. 1), piezoelectric sector elements 4 are connected to the butt end of housing 1 by one end,

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the other end has a working head 3. In Fig. 1, the arrow shows the direction of deformation of the sector elements 4. In the embodiment of the device (Fig. 2 and 3), case I is made with handles 6 and hollow; a piezoelectric cylinder 2 is made hollow inside; sector elements 4 with an outer cylindrical surface connected to the housing

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1, and the inner cylindrical surface with a working head 3, made into a thin cylindrical | a cushion ring, inside which a twisting element is installed. The element 5 of the threaded connection. In Fig. 2, the arrow shows the direction of deformation of the pie elements 4.

In another embodiment of the device (Fig. 4), the housing .1 is made with the handle 6, the piezoelectric cylinder 2 is hollow, inside which the housing 1 is installed, the pie elements 4 with the inner cylindrical surface are connected to the housing 1, and the outside with the working head 3 worn on cylinder 2. In Fig. 4, the arrow shows the direction of deformation of the pie elements 4.

The device works as follows.

In the device shown by rfa (Fig. 1), the piezoelectric cylinder 2 is seated with alternating voltage in the form of pulses, which leads to an alternate change (increase) in the height of the piezoelectronic elements 4. As the working head 3 is made of elastic material, the deformable sector elements 4 cause the deformation of its outer working surface in the form of a traveling wave. Being attached to the element 5 of the threaded joint, dineni, working head 3 due to the action of the traveling deformation wave ia element 5 causes the latter to rotate. The maximum torque is transmitted in the case where the axis of the cylinder 2 and the axis of screwing or unscrewing the element 5 of the threaded joint coincide. Fig. 1 shows a working head 3, the outer end surface of which is a plane, but it can have any shape to interact with the contacting surface of the threaded joint element 5.

The device shown in FIGS. 2 and 3 works similarly to the device in FIG. 1, only in the latter version the deformation wave of the surface of the working head 3 interacts with the lateral cylindrical surface of the element 5. For efficient screwing in or unscrewing the gap between the interacting surfaces and should not exceed amplitudes

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traveling wave deformation. With this variant of the device, the entire working surface of the head 3 is involved in the operation.

The operation of the device shown in FIG. A is similar to the operation of the devices in Figures 1 and 2. Its structural differences allow the device to be used for screwing or unscrewing threaded joints having an internal opening coaxially with the threaded surface, for example, of pipes. The operating head 3 is inserted into the hole of the screwed or unscrewed threaded connections, and the traveling wave of deformation of the head 3 causes them to rotate.

The invention makes it possible to reduce the vibration of the body of the vibration device by eliminating axial oscillations and, therefore, colliding the working head with threaded joints. The excitation of several traveling deformation waves on the surface of the working head at the same time symmetrically to the axis of the device leads to the almost complete elimination of radially directed forces and, therefore, of the diagonal vibrations.

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Claims (3)

Claim 1. Vibration device for screwing and unscrewing threaded connections, comprising a housing, a vibrator connected to it, as a piezoelectric cylinder and a working head, characterized in that, in order to reduce vibration, the piezoelectric cylinder is made in the form of sector elements interacting with each other and electrically isolated from each other, and the working head is made of an elastic material. 2. A device according to claim 1, characterized in that the sector elements are connected to one end of the body, and the other end to the working head. 3. A device according to Claim I., characterized in that the pie elements of the outer cylindrical surface are associated with the housing, and the inner one with the working head or vice versa. U / f (-A FIG. 2 : / fig.Z fie.4 Editor N. Gorvat Compiled by E, - Krg-ginger Tehred V Lsadar Proofreader A, Obruchar Order 7852/14 Circulation 976 Subscription VNIIPI USSR State Committee for inventions and discoveries T13035, „Moscow, Zh-35, Raushsk nab ,, d, 4/5 Production and printing company, city, st. Project, 4