SU1291376A1 - Honing head for coarse and fine honing - Google Patents

Abstract

The invention relates to mechanical engineering and can be used for honing holes. The invention makes it possible to simplify the design by making the couplings two-jawed without grooves and with one lead finger having a fixed position. When moving up the rod 2 finger 3 interacts with the cam surface of the upper coupling half 6 and rotates the rod until the driver finger does not sink into the groove and locks the rod in the initial position. Then, when moving downward, the stem 2 with the finger 3, interacting with the cam surface of the lower coupling half, will rotate the stem by 90 °, thereby exposing the tapered sections of the rod against the pads involved in the work, with further movement of the leash finger down the surface of the groove of the lower coupling half , the rod with conical surfaces will release the pads and processing will be performed. 3 il. i (L 00 O5

Description

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The invention relates to mechanical engineering, to machining of parts and can be used for honing cylindrical holes.

The aim of the invention is to simplify the design of the honing head for preliminary and final honing due to easier adjustment of the head, having a fixed position of the brush relative to the coupling halves.

FIG. 1 shows a honing head, a longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 - mechanism for rotation of the expansion shaft, isometric

The honing head consists of a body 1, inside which there is an expanding rod 2 and a driving finger 3, a spring 4, two two-cam half couplings 5 and 6, a ring 7, a cover 8. In the grooves of the head housing there are alternating blocks of coarse grained bars 9 and fine grain blocks bars 10.

In the slots of the housing there are also expansion strips 11, the number of which is equal to the number of all the bars in the head. Two springs 12 are placed in the grooves of the bars. A guiding inlet cone of the head 13 is fixed on the body outside the housing, as well as a moving gauge 14 is mounted.

A two-hinged fork 15 is fastened to the head from the top by means of a bayonet lock, with which it is attached to the mechanism ,,. unclamp.

Inside the double-hinged plug is installed a rod 16, which transmits the force of the expanding rod. The expanding rod has alternating working conic sections and non-working sections, made in the form of axial bald spots. The driver pin is mounted on the expanding rod so that its axis lies in the plane passing through one of the slots of the longitudinal groove. The coupling halves are equipped with each two butt-end opposed-mounted cams with grooves diametrically located between them. The coupling halves are installed in the housing with fixed keys 17 and fastened with screws 18 in such a way that the groove of the lower coupling half is oriented with the groove under the block bar, while the cams are arranged with a gap and offset equal to the groove width.

The honing head works as follows.

In the initial position, the expanding rod 50 2 (Fig. 1) under the action of the spring 4 occupies the upper position, with the lead finger 3 rests against the depressions between the fists of the upper coupling half 6 and is rotated 90 ° relative to the grooves of the lower coupling half.

The honing head is inserted into the hole of the workpiece, including the rotational and reciprocating movements attached to it, and the unclamping mechanism is turned on. The force from the drive of the unclamping mechanism is transmitted through the rod 16 to the expanding rod 2. The rod 2 moves downwards, while the driver pin 3 comes into contact with the inclined surfaces a of the cams of the lower coupling half 5 and

10, upon further movement, rotates the expander rod by 90 °, the working sections of the cones are set against the set of expansion strips of the blocks with rough bars, and the second set of expansion strips is installed against the longitudinal grooves of the pin.

Upon further movement, the expanding rod 2 is guided by a driving pin m 3, which enters the grooves b of the lower coupling half, and the working sections are in contact with

20 extensible strips 11, and those with pads of rough bars, are made by unclamping pads that come into contact with the workpiece surface, a rough honing is performed. At this time, a set of expansion strips of blocks of fine bars is inserted into the longitudinal grooves in the expansion wiper and are not involved in the work. Roughing honing continues until the feed gauge 14 enters the hole to be machined. This moment is the end of the draft honing.

Do not stop the rotation and reciprocating motion, turn off the unclamp mechanism. The expansion rod under the action of the spring 4 moves upwards, its driver finger moves along the slit grooves b of the lower coupling half 5, comes out of them, comes into contact with the inclined surfaces of the cam and upper coupling half 6 and with further movement turns the expansion rod 2. The movement and the rotation of the expanding rod stops when the driver finger falls into the depression between the cams of the upper coupling half. At this time, blocks with rough bars under the action of springs 12 will come out of contact with the treated surface and will occupy the initial position.

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The unclamping mechanism is activated. The expanding rod moves down and the driver finger comes into contact with the cam inclined surfaces of the lower coupling half, the expanding rod rotates 90 ° and this time the working sections of the cones will be in position against the set of expansion strips of blocks with finishing bars, and the second set of blocks with rough and using the finishing bars of the 55 clamp bars - in the position against the springs 12 (Fig. 1) are pressed against the split grooves of the rod. In the future, finishing bars are working, which produce a finishing honing. At the end of the clean strips 11, and those to the cylindrical sections of the expanding rod 2.

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The honing head is inserted into the hole of the workpiece, turning on the rotational and reciprocating movements attached to it, the unclamping mechanism is activated. The force from the drive of the unclamping mechanism is transmitted through the rod 16 to the expanding rod 2. The rod 2 moves downwards, while the driver pin 3 comes into contact with the inclined surfaces a of the cams of the lower coupling half 5 and

upon further movement, the expansion rod rotates by 90 °, the working sections of the cones are set against the set of expansion strips of the blocks with rough bars, and the second set of expansion strips is installed against the longitudinal grooves of the rod.

Upon further movement, the expanding rod 2 is guided by a driving pin m 3, which enters the grooves b of the lower coupling half, and the working sections are in contact with

0 expansion strips 11, and those with pads of rough bars, is made by unclamping pads that come into contact with the workpiece surface, a rough honing is performed. At this time, a set of expansion strips of blocks of fine bars is inserted into the longitudinal grooves in the expansion wiper and are not involved in the work. Roughing honing continues until the feed gauge 14 enters the hole to be machined. This moment is the end of the draft honing.

Do not stop the rotation and reciprocating motion, turn off the unclamp mechanism. The expansion rod under the action of the spring 4 moves upwards, its driver finger moves along the slit grooves b of the lower coupling half 5, comes out of them, comes into contact with the inclined surfaces of the cam and upper coupling half 6 and with further movement turns the expansion rod 2. The movement and the rotation of the expanding rod stops when the driver finger falls into the depression between the cams of the upper coupling half. At this time, blocks with rough bars under the action of springs 12 will come out of contact with the treated surface and will occupy the initial position.

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The unclamping mechanism is activated. The expanding rod moves down and the driver pin contacts the inclined cam surfaces of the lower coupling half, the expanding rod rotates 90 ° and this time the working sections of the cones are in position against the set of expansion strips of blocks with finishing bars, and the second set of honing turns off the mechanism unclamp.

The expanding rod rises upwards, turning from the engagement of the pivot pin with the cam inclined surfaces of the upper coupling half until it reaches the initial position, the pads with the finishing bars under the action of the springs are compressed, occupying the initial, initial position. Turning off and stopping the rotation and reciprocating movement, the head is removed from the treatment area. The machined part is removed from the machine.

Claims (1)

Invention Formula A honing head for preliminary and final honing, containing two sets of pads with bars of different characteristics installed in the housing grooves with the ability to interact with longitudinal grooves, evenly spaced around the circumference, expanding rod with a fixed perpendicular to its axis with a finger, designed to interact with the cams of the mechanism of rotation of the expanding rod, made on the ends fixed in the housing coaxially to the rod and located with a gap half couplings with grooves that differ so that, in order to simplify the head design, each of the coupling halves is provided with an additional cam located at the end opposite the main cam on the other side of the groove diametrically formed at the end, while the coupling halves are installed with their cams rotated 90 ° relative to each other, and the finger placed in the gap between the half couplings and oriented with one of the longitudinal grooves of the rod. | l .f Compiled by A. Drozdetsky Editor S. PatrushevTehred I. VeresKorrektor M. Pojo Order 86/18 Circulation 716 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4