SU1346404A1 - Apparatus for cutting pipes - Google Patents

Abstract

The invention relates to mechanical engineering, to the construction of installations for cutting pipes with an abrasive tool, in particular to cutting installations of a pendulum type, intended for cutting small-sized blanks such as threaded bushings for luminaires. The purpose of the invention is to increase productivity by providing a smooth, shock-free embedding of the cutting tool into the workpiece, an exact sequence of actuation of the working elements of the installation and the exact mode of their operation. The device contains a set of cams mounted on a common shaft 15. A device for compensating the wear of the cutting tool, including a ratchet gear, the gear wheel 23 of which is matched with an adjusting screw 6 of the stop 3, touching the head 2, a spring-loaded valve 25, carrying the ratchet pawl 24 of the ratchet mechanism and pin, interacting with the directions, J a 77 Y. /

Description

3 4b404

the control of the movement of the rear 1: 25 ki; a cutting cut, the displacing control is carried out from the cutting cam A. by the cutting wear compensation unit. The working contour of the cam is made from the tool, 6 Il.

one

The invention relates to mechanical engineering, to the construction of installations for cutting pipes with an abrasive tool, and in particular to cutting machines of a pendulum type, intended for cutting small-sized workpieces such as threaded bushings for luminaires.

The purpose of the invention is to increase productivity by ensuring a smooth, shock-free embedding of the cutting tool into the workpiece, the exact sequence of the working bodies of the installation and the exact mode of their operation.

FIG. 1 shows a kinematic diagram of the device; in fig. 2 - cutting cam; FIG. 3 shows a gripping and feeding unit; in fig. A — view A of FIG. 3; in fig. 5 is a kinematic diagram of the cutting tool wear compensation unit; in fig. 6- the same, when the workpiece is not completely cut.

The cutting tool in the form of an abrasive disk is mounted on the head 2, which is pivotally mounted on the mounting frame. The head 2 is provided with a hinged support 3, abutting the cutting cam 4, and a spring 5. The length of the support 3 is adjusted by the adjusting screw 6. The fixing body 7 with the cam 8 and the spring 9 fix the workpiece when cutting. The gripping and feeding unit 10, equipped with the gripping cam 11 and the spring 12 and the feeding cam 13 and the spring 14, captures and delivers the workpiece during installation operation. Cams 4, 8, 11 and 13 are mounted on a common shaft 15, driven in rotation from the electric motor 16 by means of a V-belt transmission 17 and a gearbox I 8.. The cutting movement of the cutting tool 1 is carried out from the electric motor 19 by means of a V-belt transmission 20. The stop is 3 ka

S

0

five

0

five

0

five

The tangential head 2 is connected by a lever actuator 21 connected to the stop 3 by a hinge to the slider 22 of the cutting tool wear compensation device 1. The cutting tool wear compensating device includes a ratchet mechanism, the gear wheel 23 of which interacts with the adjusting screw 6 of the stop of the rocking head 2 , and the ratchet pawl 24 is embedded in the latch 25, which is installed in the groove of the slider 22, the Latch 25 is provided with a pin 26, which cooperates with the direction of the jaw (they 27 and 28 control the movement of the latch 25, The guide 27 includes a spring-loaded arrow 29. The cutting cam 4 is provided with a notch 30 that controls the operation of the wear compensation device of the cutting tool 1.

The operation of the device is as follows.

By switching on an electric motor by means of a V-belt transmission 20, rotation-cutting needle 1 is activated. By switching on an electric motor 16 by means of a V-belt transmission 17 and gearbox 18, a set of cams 4, 8, 11 and 13 is rotated, which control the operation of the installation units: the cam 8, - the fixation body 7 when cutting, the cam 4 - the cutting process and the cams II and 13 - the gripping and subsequent feeding of the workpiece for the next work cycle. The elastic elements in the form of springs 5, 9, 12 and 14 carry out the working stroke of the bodies 1, 7 and 10 of the device.

The operation of the wear compensation unit of the cutting tool 1 of the abrasive disk is as follows: reciprocating movement of the crawler, 22 is carried out from the stop 3 of the swinging head 2 by means of a lever drive 21 of the device. When cutting the workpiece, the slider 22 moves down. After the cutting tool 1 passes the workpiece, the stop 3, with further cutting of the cutting cam 14, moves along the working contour of the cam, falls into the notch 30, and therefore the slider 22 reaches its lowest position. The valve 25 under the action of the springs will jump to the extreme left position. During the subsequent return movement of the slide 22. The pin 26 of the valve 25 slides along the guide 28, the arrow 29 moves away and the valve 25 along the inclined part of the guide 28 returns to its original position. The arrow 29 under the influence of a spring (not shown) returns also to

initial position. The pawl 24 in this two-fold mechanism containing a toothed case does not engage the toothed wheel 23 - the idling of the device.

As the cutting tool is worn, the time it cuts the workpiece with it will be delayed. A moment will come when the stop 3 will have time to skip the cutting 30 on the cutting cam 4 until the cutting tool I cuts the workpiece I and the slider 22 will not reach the lowest position. The latch 25 can not jump to the extreme left position, and when the return movement of the slide 22, the pawl 24 captures the gear wheel 23, thereby turning the adjusting

25

thirty

35

This wheel is installed with the possibility of interaction with the pawl placed on a spring-loaded gate valve installed in the groove of the cam slide mechanism containing a cutting cam with a slot, placed on the drive shaft inserted into the device and mounted with the possibility of engagement of a stop pivotally attached to the swing head of the tool with a screw for adjusting its length, which is pivotally connected to the ratchet slider, while the screw for adjusting is mounted so as to cooperate with the gear Olesen ratchet.

screw 6 of the stop 3, the connection with which the length of the stop 3 is reduced, and the extreme distance of the cutting tool 1 from the workpiece is reduced, and the amplitude of the working stroke of the cutting tool 1 is maintained.

Claims (1)

Invention Formula A device for cutting pipes with an abrasive tool mounted on a swinging head mounted hinged on the frame, containing a cutting tool wear compensation unit, a workpiece gripping and feeding unit, characterized in that, in order to increase productivity, the wear tool compensation node is in the form of temple This wheel is installed with the possibility of interaction with the pawl placed on a spring-loaded gate valve installed in the groove of the cam slide mechanism containing a cutting cam with a slot, placed on the drive shaft inserted into the device and mounted with the possibility of engagement of a stop pivotally attached to the swing head of the tool with a screw for adjusting its length, which is pivotally connected to the ratchet slider, while the screw for adjusting is mounted so as to cooperate with the gear Olesen ratchet. 3uf A YU Editor .V.Danko Compiled by N.Finn Tehred L.Oliynyk Order 5078/13 Circulation 714 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5 Production and printing company, Uzhgorod, st. Project, 4 Proofreader V. But ha