SU1687381A2 - Device for cutting thin-walled tubes - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used for cutting thin-walled pipes into dimensional workpieces with the simultaneous processing of their end sides. The purpose of the invention is to increase productivity and expand technological capabilities. The device comprises a base 1. on which the cutting unit 2 is mounted, a clamping mechanism 3, a feed mechanism of the pipe 106 with a gripping member 5. The device is equipped with a means for processing the end surfaces of the blanks 107, made in the form of four spindle heads 6 equipped with rotational drives and axial feeding of the tool 89 mounted in pairs coaxially on both sides relative to the axis of the pipe feed, parallel to this axis. The transfer mechanism of the cut parts is made in the form of a rotary arm 7 provided with two grippers, the symmetry axes of the clamping jaws in their working position are arranged to coincide in the extreme positions of the rocker arm 7 with the feed axis of the pipe 106 and the axes of rotation of the tool 89 of spindle heads 6. 15 silt (Ls

Description

The invention relates to the processing of metals by pressure, can be used in mechanical engineering for the production of pipe parts and is an improvement of the device for cutting thin-walled pipes according to the authors. St. Ns 1263447.

The aim of the invention is to increase productivity and expand the technological capabilities of the device for cutting pipes.

FIG. 1 shows a device for cutting thin-walled pipes, a general view; FIG. 2 is a view along arrow A in FIG. one; in fig. 3, 4 — section BB in FIG. 1, extreme positions of the rocker; FIG. 5 shows a cutting assembly and an additional clamping mechanism in axial section; in fig. 6 shows a section B-B in FIG. five;

in fig. 7 - section GG in FIG. 5; in fig. 8 is a section DD in FIG. five; in fig. 9 is a section of the EE of FIG. eight; in fig. 10 - gripping organ of the pipe feed mechanism; in fig. 11 is a section of the LF in FIG. ten; in fig. 12 - spindle head in axial section; in fig. 13 - rotary beam in cross section along the axes of the drive cylinders; in fig. 14 is a view 3 in FIG. 13; in fig. 15-16 - processing scheme of the end of the workpiece.

The device comprises a base 1 on which an assembly 2 and an additional clamping mechanism 3 are mounted, a pipe feed mechanism 4 with a gripping body 5, spindle heads 6 and 7, a swivel arm 8 mounted on the shaft 9 and fixed against lateral displacement

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fork 10. The shaft 9 is provided with a gear wheel 11, which engages with a gear rack 12 connected to a movement drive in the form of, for example, a power cylinder (not shown in the drawings).

The cutting unit 2 includes a support plate 13 with a stand 14 on which a power cylinder 15 with a hub 16 and an end cap 17 is mounted. On the hub 16, a sleeve 19 is mounted on bearings 18 with a sleeve 20 and an asterisk 21 fixed from axial displacement by a cover 22, In cylinder 15 a piston 23 with a hollow rod 24 is installed and working cavities 25, 26 are formed. A collet clamp 27 fixed by a nut 28 is mounted in the hole of the stem 24, fixed by a nut 28, the conical surface of the clamp 27 in working position fits into the conical bore of the hub 16. In parallel grooves 29, 30 20 sliders 31, 32 with knives 33, 34 attached to them with saw-tooth cutting edges, entering from the side of cutting edges into recesses 35, formed in the walls of grooves 29. 30. Sliders 31. 32 from the outside are provided with fingers 36 mounted on them rollers 37. An additional clamping mechanism 3 includes a support plate 38 on which a copier plate 39 with cylinder 40 and cover 41 is fixed. In cylinder 40 a piston 42 with hollow rod 43 is installed and working cavities 44, 45 are formed. A collet clamp is mounted in the hole 43 of the rod 43 46, fixed nut 47, which simultaneously is a guide member for the pipe. In the copier plate 39 there are end-face helical grooves 48, 49 arranged to interact with the rollers 37 of the fingers 36.

The conical surface of the clamp in the working position enters the conical opening of the plate 39. The collet clamps 27 and 46 are aligned. On base 1, a housing 50 is fixed in which a shaft 51 is mounted with a gear wheel 52 and an asterisk 53. A wheel 52 engages with a rack 54 installed in the opening of the housing 50 and connected to a displacement drive in the form of, for example, a power cylinder (actuator in drawings not shown). The sprocket 53 is connected by a plate chain 55 with an asterisk 21 cutting nodes.

The pipe feed mechanism 4 is a power cylinder 56 with a piston 57, a rod 58 and working cavities 59, 60. A gripping member 5 is mounted on the rod 58, including a housing 61 with a cover 62, in which radial grooves clamp claws 63, 64 are mounted, 65 supplied with

lateral sides with gear racks 66 and interconnected gears 67 mounted on axles 68. Cam 63 is connected by a rod 69 to piston 70 of a power cylinder 71 in which working cavity 72 is formed.

The piston 70 is pressed by the spring 73 to its original position and holds the cams 63, 64, 65 in the retracted position.

The spindle heads 6 include a housing 74 with covers 75, 76 in the bore of which a piston 77 is installed with a hollow rod 78 and a working cavity 79 is formed. The piston 77 is pressed to its initial position by a spring 80. In the rod hole 78 on bearings 81 a spindle 82 is mounted with a splined shank 83 fixed through bearing 81 against axial movement by covers 84. Rod 78 is fixed

from turning relative to the housing 74 key 85.

The shank 83 of the spindle 82 is inserted into the slotted hole of the coupling 86 fixed to the rotational drive shaft 87, for example, an electric motor. The housing 74 and the actuator 87 are mounted on a base plate 88. On the front part of the spindle 82, a cutting tool 89 is fixed, for example, a countersink drill or an abrasive stone. The spindle heads 6 are mounted in pairs coaxially on both sides relative to the axis of the feed pipe, parallel to this axis. Between the coaxial spindle heads 6 are installed trays 90 for receiving treated

blanks.

Swivel arm 8 includes a housing 91 with a cover 92 and support jaws 93, on which using axles 94 are mounted swivel arms 95, 96 with clamping

jaws 97. In parallel cylindrical bores of the housing 91, pistons 98, 99 with rods 100 are installed and working cavities 101, 102 are formed. Rods 100 are engaged with pins 103, 96 by means of pins 103. Pistons 98, 99 are pressed to their initial position by springs 104 and hold the levers 95, 96 in the open state. The housing 91 is fixed against rotation with respect to the shaft 9 with a key 105 secured in the opening of the housing and entering with the possibility of longitudinal movement along the key groove of the shaft 9.

The axes of symmetry of the gripping jaws 93.97 in their working position are arranged to coincide in the extreme positions of the rocker arm 7 with the feed axis of the pipe and the axes of rotation of the tool of spindle heads 6. Position 106 - cut the pipe, 107 - cut the workpiece, chamfer removed at the end of the workpiece 107 using tool 89.

The heads 6 and the yoke 7 are mounted to move in the direction of the axis of the pipe 106 in order to readjust to workpieces 107 of different lengths I. The collet clamps 27 and 46, the jaws 93 and the swivel arms 95, 96 of the swivel beam 8 are interchangeable to change the device for cutting pipes of different diameters.

The device works as follows.

The compressed air is fed into the cavity 72 of the cylinder 71 and the pipe 106 is clamped with the help of cams 63-65 of the gripping body 5 and supplied with compressed air into the cavity 59 of the cylinder 56 in the axial direction along arrow K for the length I of the workpiece, and then with compressed air into the cavity 25 , 45 cylinders 15, 40 are clamped by collet clamps 27, 46, while the slide blocks 31, 32 with the blades 33, 34 are in the extended position.

In the process of feeding the pipe 106 previously, the cut billet 107 is moved by the pipe from the collet chuck 46 to the support sponge 93 of the swivel link 7. The swing arms 95, 96, which form the grippers, are in the open position. By supplying compressed air, for example, to the cavity 102 of the rocker arm 8, the piston 99 rotates the lever 96 and presses the workpiece 107 with the sponge 97, after which the rocker arm 8 rotates through the working angle (for example, 90 °) by means of the elements 11, 12 and the shaft 9 is set coaxially with the axis of rotation of the tool 89 heads. 6, while the tool 89 is rotating.

By supplying compressed air in the cavity 79 of the spindle heads, the tool 89 is brought to the ends of the workpiece 107 and cuts sharp (Fig. 16), chamfering 108 (Fig. 17). After clamping the pipe 106 with the collet clamps 27, 46, the rotation of the shaft 51 is activated and the rotation 20 is connected through the chain drive 21, 53, 55, while the rollers 37 move in the spiral grooves 48.49 of the copier plate 39 and move the sliders 31.32 with knives 33.34 in the opposite direction in the direction of rotation. This is the cut of the pipe 106.

After moving the sliders 31, 32 to the initial position, the compressed air is supplied to the cavity 26, 44 of the cylinders 15, 40, and the cavities 25, 46 are connected with the external medium and

the petals of the collet clamps 27.46 are unfolded. At the same time, the tool 89 of the spindle heads is retracted from the machined workpiece 107; for this, the cavity 79 is connected to the external medium and

springs 80 retracted rods with spindles mi 82 to their original position. The cavity 102 is connected to the external environment, the piston 99 under the action of the spring 104 rotates the gripping lever 96 to the open position and

the finished workpiece falls out on tray 90. The next workpiece 107 is clamped with a sponge 97 of the lever 95 and is fed to the machining of the ends using adjacent spindle heads. After filing the pipe 106 cavity 72

the cylinder 71 and the cavity 59 of the cylinder 56 are connected to the external environment, and the cavity 69 is supplied with compressed air and the gripping body 5 is retracted to the initial position for clamping the pipe and its next supply.

The next cycle of feeding and cutting the pipe and processing the ends of the workpiece is carried out in a similar sequence.

thirty

Claims (1)

Invention Formula A device for cutting thin-walled pipes according to ed. St. N; 1263447, characterized in that, in order to increase productivity and expand technological capabilities, it is equipped with a machining mechanism for end surfaces obtained by cutting parts, made in the form of four driving with the possibility of rotation of spindle heads with tools for axial feeding of tools mounted in pairs coaxially on both sides relative to the axis of the yoke, symmetrically and parallel to it, and the transfer mechanism of the cut parts to the processing position made in the form mounted on the drive shaft parallel to the axis of the yoke, rocker with two drive clamps, the axis of symmetry of the clamping jaws in the extreme working positions of the rocker arms located on the cage axis and the axis of rotation of the tools of the corresponding pair of spindle heads. ,, 50 Ю658 5 rl   R 5J 51 52 50 54 7 Yu Figb V 5 Ю6 FIG. 2 107 69 12 11 89 1010789 6 / / / / / / / / / / & 06 9-9 C & D sh 6Ј 9Ј / 901 S gpf M 9Z ЈZ 18e /. I if 33 20 III / /  fJ F 32 m. FIG. 7 th BUT 37 Ј - Ј FIG. at FIG. 9 T     xhh L J5 /; 2PF igCS 99 LQ 29 SQ W-W OL snC -92 li 18E / L891 gz g-ss - 4V diz