SU555998A1 - Cutting machine - Google Patents

Description

A horizontal carriage 2 is mounted on the horizontal guides of the bed 1, carrying in the housing 3 a two-cutting cutting head 4 driven by an electric motor 5. On the carriage 2 two bodies 6 are fixed, in which the movable chambers 7 are located (see Fig. 3), kinematically associated with the pneumatic cylinder 8, the central gear wheel 9 and the intermediate gear wheels 10. In one of the housings 6, a replaceable guide sleeve 11 is fixed, which serves to pre-center and guide the pipe. Cutting heads 12 are fixed on the cutting head 4, radially moving from the copier ruler 13 through the slider 14 with the roller 15, the pneumatic cylinder bar 16, the lever 17 and further the sleeve 18 connected by the levers 19 with the tool holders 20. The spring 21 serves for instant removal of the cutters after the end cutting

The measuring part of the automaton consists of two tubular rods 22 interconnected by crossmembers 23 to form a movable frame fastened to the body 3 of the cutting head 4. The guide rollers 24 bearing the frame are mounted on fixed brackets 25. The transverse frame is fixed on the longitudinal bars of the frame depending on the length of the cut-off workpiece, the housing 26 carrying the movable measuring stop 27. In the aggregate, the movable carriage with cutting and clamping devices and the movable frame rigidly connected with it with the measuring emphasis 27 constitute t total measuring and cutting machine node. Rollers 28 are located on measuring lug 27, which with the help of wedge bars 29 fixed on the body of self-propelled roller table 30, determine the vertical position of measuring lug 27 in the measuring process, cut n the transportation of the cut piece, and rollers 31 that keep the abutment in the upper position. The rollers of the roller table 30 are driven by electric motors 32.

The drive unit for supplying and synchronizing the speed of the measuring and cutting unit of the automaton with the speed of the moving tube consists of a power executive tracking drive and a master tracking drive.

The power follow-up drive consists of a movable hydraulic cylinder 33 of a stunner type, a follow-up spool 34 and a link 35 connecting the power drive with the driver.

The follower driving drive includes a torque torque hydraulic booster 36 with a rotatable sleeve 37 mounted on it with a contact roller 38 which is kinematically connected with the hydraulic booster input shaft. On the output shaft of the hydraulic booster 36, the crank 39 is connected, connected to the connecting rod 40 with an earring 41. The end part of the connecting rod 40 contacts the link 35 of the next spool 34. The initial position of the connecting rod 40 is controlled by a limit switch 42. The pneumatic cylinder 43 is connected to the sleeve 37. On the left

The hydraulic cylinder 44 of the plunger type is located on the side of the bed 1, which returns the measuring and cutting unit to its initial position.

Cutting machine works as follows.

The tube moving from the tube mill enters the guide point 45 and the guide sleeve 11 and passes freely through the hole of the spindle of the cutting head 4. When

At the end of the pipe, the pneumatic cylinder 43 is turned on by the photodiode, which, by turning the sleeve 37, introduces the contact roller 38 in contact with the surface of the moving pipe. A rotary motion of the moment amplifier slide is then communicated via a gear located in the sleeve 37. Crank 39 mounted on the output shaft

the amplifier of moments, by means of the earring 41, informs the pivotal movement of the connecting rod 40, tracked by the slide valve 34 of the movable hydrocyliidra 33, which gives the main increase to the measuring cutting unit of the machine gun

speeds from zero to pipe speed. Measurement of speed occurs according to the law of sine (see Fig. 4 and 5). The direction of speed coincides with the direction of movement of the pipe.

The maximum speed of the measuring-cutting unit UA and the speed of the UT pipe can be equal (see Fig. 4) or the maximum speed of the measuring-cutting node is taken slightly higher (see Fig. 5). Landing the end of the pipe to the measuring stop 27 occurs at point M, while the speed of the measuring and cutting unit is less than the speed of the pipe by the amount AV. When the drive roller comes into contact with the moving tube, the speed of the measuring-cutting unit is zero. This corresponds to the start of the operation of the feed drive and the synchronization of the speed of the measuring and cutting unit of the machine with the speed of the moving pipe. At this moment, the end of the pipe is at a distance / from the measuring

stop 27 (see Fig. 1).

After the end of the pipe is seated on the measuring stop 27, the measuring and cutting unit moves along the rolling guides 24 (see Fig. 2) directly by the pipe. At the same time, using a track finder, the clamping devices of the pipe, located on the carriage 2 on both sides of the cutting headstock, are turned on. The pipe is clamped by a pneumatic cylinder 8, cams 7 and

gears 9 and 10 (see Fig. 3). At the same time, with the help of a carbon copy of the ruler 13, after the accelerated radial supply of the cutters 12 to the surface of the pipe with parts 14, 15, 16, 17, 18, 19 and 20, it is cut off;

This piston of the pneumatic cylinder 16 is pressed to the upper position. In the process of cutting pipe rollers 28, mounted on the measuring stop 27, incident on the wedge bars 29, fixedly mounted on the housing

the roller table 30, as a result of which the measuring stop 27 rises along the guides to the upper position, ensuring the free transportation of the cut pipe through the roller table.

After the pipe sections are cut, the carriage 2 slides over the limit switch, as a result of which the pneumatic cylinder 16 is turned off, which allows the spring 21 to instantly retract the cutters, the pipe is pressed in the clamping devices, the spool 46 switches (see Fig. 1) to the position of free discharge of oil into the hydraulic tank and turn on the cylinder guide 44 of feeding the measuring and cutting unit to the right initial position.

The end a of the rod of the movable hydraulic cylinder 33, which has a conical shape, when the carriage 2 approaches to the right initial position, slows down the discharge of oil from the cylinder 33 and eliminates the impact when the carriage approaches the rigid stop.

The cut pipe is transported along a self-propelled roller table 30 at an accelerated speed, while the measuring stop 27 by the roller 31 touching the surface of the pipe being transported is maintained in the upper position. After the pipe leaves the measuring stop zone, the latter takes the lower initial position for measuring the next billet. The contact roller 38 is brought out of contact with the moving tube by the pneumatic cylinder 43 and the crank-rod mechanism is turned off in the initial position to ensure the subsequent cycle by the limit switch 42 after a full rotation of the crankshaft, at the moment of contact with the crank 40. At the same time The position shown in FIG. 1. Thus, the introduction of the synchronization unit provides a smooth, stepless acceleration of the measuring and cutting unit of the automaton from zero to the speed of the pipe, which greatly improves the reliability of cutting and, consequently, productivity. In addition, the installation of a double-cut rotary cutting head with a radial feed from the copier and a mechanism for instantly removing the incisors after cutting from the pipe also contributes to an increase in productivity.

Claims (2)

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