RU2297306C1 - Tube end portions threading apparatus - Google Patents

Abstract

FIELD: working materials by cutting, threading operations at mounting pipelines for heating and water supplying, mainly in field condition.

SUBSTANCE: apparatus includes head with central opening for inlet of worked article and with clamps for securing cutters. Said head is mounted in attachment providing its basing and rotation around worked tube. Apparatus also includes handles and base-clamping mechanism. In order to simplify design of easily transportable apparatus, base-clamping mechanism includes tubular guide having shoulder and two grooves in its mean portion, threaded zone and open groove in one end of tube, sleeve with two outer and two inner turnings and radial openings in its ends, two springy slit rings mounted without axial shift in outer turnings of sleeve. One of said rings has annular recess in its central portion. Other ring has axial recesses coinciding with radial openings of sleeve. Said mechanism also includes balls; retainer races; two clamp rings movably mounted in guide and having axial slits, radial raceways for balls in their cone portion and internal thread on their rims; nut with outer thread for joining with one clamp ring and with central threaded opening. Said nut enters grooves of guiding key. The last has outer thread in its wings for joining with other clamp ring and left-hand thread in central opening. Screw with right-hand thread in its end and left-hand thread along its large diameter for joining with nut and with key respectively is also provided. Head includes body with central threaded opening and cylindrical turning in inner end of threaded opening; two bosses; rim in one cylindrical surface; flat and groove in other cylindrical surface. In order to form outer thread, apparatus is provided with detachable rotary support mounted on axles in openings of said bosses and having two shelves with openings. Cutter is mounted in opening of one shelf. Follower screw with ball is mounted in threaded opening of other shelf. Said shelves are placed at different sides relative to said axles in the same axial plane of threaded opening of head body. Shelf with follower screw enters grooves of body. Clamping mechanism is mounted on flat of body and it has cleat with openings. In one of cleat openings stop with washer, nut and pack of disc springs is arranged. Said springs acts upon stop engaging with support. In order to form internal thread, apparatus is provided with support sleeve mounted in cylindrical turning of head body. Apparatus includes set of parts for driving head. Said set is mounted in guide and it includes

thread follower for forming outer thread, angle follower for cutting outer thread and angle follower for cutting internal threading and it has for forming internal thread guiding sleeve and angle follower for cutting internal thread.

EFFECT: improved simplified design of transportable apparatus.

6 dwg

Description

The invention relates to the field of processing by cutting, threading during installation of pipelines of heat and water supply.

A device for cutting threads at the ends of pipes during installation of pipelines, mainly in the field, including a head with a central hole for the input of the workpiece with clamps for attaching the cutters, is installed in the device, providing its basing and rotation relative to the processed pipe, handle and base clamp a mechanism installed in the hole of the pipe being processed (see SU 1306661, B23G 1/24, 1987).

The problem to which this invention is directed, is to create a simple in design, safe, small, transportable, quick-assembly device for threading at the ends of pipes, especially necessary for field conditions.

The problem is solved in that in a device for threading at the ends of pipes during installation of pipelines, mainly in the field, including a head with a central hole for the input of the workpiece with clamps for attaching the cutters, installed in the device, providing its basing and rotation relative to the processed pipe , the handles and the base clamping mechanism installed in the hole of the processed pipe, according to the invention, the base clamping mechanism consists of a tubular guide frames with a shoulder and two grooves in its middle part, a thread and an open groove from one of its ends, bushings with two outer and two inner grooves and radial holes at its ends, two spring split rings installed without axial displacement in the outer grooves of the bush, moreover, one ring has an annular groove in its central part, and the second has axial grooves coinciding with the radial holes of the sleeve, balls, separator rings, two collet rings mounted movably on the guide and having axial slots and p radial tracks for balls on the conical part and internal threads on the crowns, nuts with an external thread for pairing it with one of the collet rings and a central threaded hole in the grooves of the guide pin with an external thread on its “wings” for pairing it with another collet a ring and a left-hand thread in the central hole, a screw with a right-hand thread at the end and a left-hand thread on its large diameter, with which it mates with a nut and a pin, respectively, the head consists of a housing with a central threaded hole and has a cylindrical a groove at the inner end of the threaded hole, two bosses, a nimbus on one cylindrical surface, a flange and a groove on the other, while for machining the external thread, the device is equipped with a removable rotary caliper mounted on the axes in the holes of the bosses of the housing and having two shelves with holes in the hole a cutter is installed on one shelf, and a copy screw with a ball located on different sides relative to the mentioned axes and lying in the axial plane of the threaded hole of the housing is installed in the threaded hole of the other, while the shelf a copy screw enters the groove of the housing, and a clamping mechanism mounted on the flat of the housing and containing a bar with holes, in one of which there is a stop with a washer, nut and a packet of Belleville springs, under the influence of which the stop acts on the support, and for processing internal thread - a caliper sleeve installed in a cylindrical groove of the head housing, a set of head drive parts mounted on a guide and consisting of an external thread made of a threaded copier, an angled copier for cutting bunks zhnoy thread and angular copier for tapping and for processing the internal thread - of the guide sleeve and angular copier for tapping.

The problem is also solved by the fact that the device is equipped with racks with prismatic clamps for fastening the pipe.

Figure 1 shows a device for threading at the ends of the pipes, a General view, figure 2 is a view K, figure 3 is a section aa, adjustment for cutting external threads, figure 4 is a section bB, 5 is a section aa, adjustment for cutting internal threads, footnote I - Fig.6.

The device comprises racks 1 equipped with prismatic clamps 2 and anchor corkscrews / not shown on the drawing /, the base-clamping mechanism 3, consisting of a guide 4 of a tubular shape with a shoulder and two grooves in its middle part, a thread and an open groove from one of its ends , bushings 5 with two outer and two inner grooves and radial holes at its ends, spring split rings 6 and 7 mounted without axial displacement in the outer grooves of sleeve 5, and ring 6 has an annular groove in its central part, and rings 7 axial grooves coinciding with the radial holes of the sleeve 5, balls 8, separate rings 9, two collet rings 10 mounted movably on a guide 4 having axial slots / in the drawings shown / and radius tracks for balls on their conical part and internal thread on the crown, nuts 11 with an external thread for pairing it with one collet ring and a central threaded hole, checks 12 with an external thread on its “wings” for pairing it with another collet ring and a left thread in the central hole, screw 13 with a right-hand thread at the end and left on its larger diameter, by which it mates with a nut 11 and a pin 12, a head 14 consisting of a housing 15 with a central threaded hole, a cylindrical recess at the inner end of the threaded hole, two bosses, a whisk on one cylindrical surface, flat and a groove on another, a rotary caliper 16 mounted on the axles 17 in the holes of the bosses of the housing 15, having two shelves, a cutter 18 is installed in the hole of one of them, and another copy screw 19 with a ball 20 is located in the threaded hole, located at different the sides of the axes 17 and lying in the axial plane of the threaded hole of the housing 15, while the shelf with a copy screw 19 enters the groove of the housing 15, the clamp mechanism 21 mounted on the flat side of the housing 15 and containing the strap 22, in one of the holes of which there is a stop 23 s a washer, a nut and a packet of Belleville springs 24, under the action of which it interacts with a support 16, handles 25, a set of parts for the drive of the head 14 mounted on a guide 4, which consists of a threaded copier 26, an angled copier 27 for cutting an external thread, angled th copier 28 for cutting internal threads, caliper sleeve 29 and guide sleeve 30.

The device operates as follows.

In the prismatic clamps 2 of the racks 1 installed on a relatively flat platform and fixed on it with anchor corkscrews, a pipe is placed on which it is supposed to cut the threads and clamped in them with the screws provided for this / not shown in the drawings /. The hole of the pipe from its ends at a length of about 0.7 m is cleaned of dirt, burrs and other gross defects, then the base clamping mechanism 3 is inserted into the hole of the pipe, to a special mark, where it is fixed by turning the screw 13 to the right with a special key / in the drawing not shown /, while the nut 11 and the pin 12 move the collet rings 10 to approach them, expanding the spring rings 6 and 7 by means of the balls 8, while the ring 6, thanks to the annular groove, secures the guide 4 in the axial direction, and the ring 7 thanks to axial grooves from growth. Depending on the thread being cut, the head 14 is assembled, for cutting the external thread according to the drawings of Fig. 3 and Fig. 4, for the internal thread according to the drawing of Fig. 5.

1. Thread pipe groove

A special cutter is installed in the caliper 16 or caliper sleeve 29 of the head 14, the depth of cut is adjusted with the help of the counter screw 19, we rotate the head 14 by the handles 25, and the head moves along the guide 4, screwing onto the threaded copier 26, and the cutter, following the rotation of the head and copying the angle of inclination of the surface under the thread by copy 27 or copy 28, processes the end of the pipe.

2. Threading

A special threaded cutter is installed in the caliper 16 or caliper sleeve 29 of the head 14, the depth of cut is adjusted and the cutting is performed similarly to turning, and both turning and threading can be performed in one or several passes, changing the cutting depth during external processing with using a copy screw, and with an internal change of incisors due to their different lengths. The parts of the drive for moving the head 14 are fastened by pressing them with the nut 31 to the shoulder of the guide 4, and the threaded copier with an additional pin 32, which enters the open groove of the guide 4.

Claims (2)

1. Device for threading at the ends of pipes during installation of pipelines, mainly in the field, including a head with a central hole for the input of the workpiece with clamps for attaching the cutters, installed in the device, providing its basing and rotation relative to the processed pipe, handle and base-clamp mechanism installed in the hole of the processed pipe, characterized in that the base-clamping mechanism consists of a tubular guide with a shoulder and two grooves in its middle parts, with a thread and an open groove from one of its ends, bushings with two outer and two inner grooves and radial holes at its ends, two spring split rings mounted without axial displacement in the outer grooves of the bush, one ring having an annular groove in its central parts, and the second - axial grooves coinciding with the radial holes of the sleeve, balls, separator rings, two collet rings mounted movably on the guide and having axial slots and radial tracks for the balls on the conically parts and internal threads on the crowns, nuts with an external thread for pairing it with one of the collet rings and a central threaded hole included in the grooves of the guide pin with an external thread on its “wings” for pairing it with another collet ring and a left-hand thread in the central the hole, a screw with a right-hand thread at the end and a left-hand thread on its large diameter, with which it mates with a nut and a pin, respectively, the head consists of a housing with a central threaded hole and has a cylindrical groove on the inner end about holes, two bosses, a whisk on one cylindrical surface, a flange and a groove on the other, while for machining the external thread the device is equipped with a removable rotary caliper mounted on the axes in the holes of the bosses of the case and having two shelves with holes, a cutter is installed in the hole of one shelf and into the threaded hole another is a copy screw with a ball located on different sides relative to the mentioned axes and lying in the axial plane of the threaded hole of the case, while the shelf with the copy screw enters the groove of the case, a clamping mechanism mounted on the flat of the body and containing a bar with holes, in one of which there is an abutment with a washer, a nut and a bag of Belleville springs, under the influence of which the abutment acts on the caliper, and for processing internal thread - a caliper sleeve mounted in a cylindrical undercut of the housing the head, a set of parts for the drive head mounted on the guide and consisting for machining the external thread of a threaded copier, an angular copier for cutting an external thread and an angled copier for a bench anija internal thread and internal thread to processing - of the guide sleeve and angular copier for tapping. 2. The device according to claim 1, characterized in that it is equipped with racks with prismatic clamps for fastening the pipe.

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