RU70829U1 - DEVICE FOR CLAMPING THE LENGTH PIPES ON A LATHE MACHINE - Google Patents

Abstract

The utility model proposed for protection relates to devices for cold processing of pipe billets by pressure, namely to dies for crimping pipe ends, in particular, aircraft pipelines. The tool for crimping the ends of long pipes on a lathe is aimed at expanding technological capabilities by creating a device that allows crimping the ends of long pipes of small diameter on universal equipment, as well as reducing the cost of stamping equipment. In a fixture for crimping the ends of long pipes on a lathe containing a retaining device for a tube billet, a profiled matrix and an abutment, the latter is multistage, one of the steps is threaded, the retaining device consists of a housing fixed in the machine chuck, one end of which has a female thread the thread of the stop stage, and the other, the external thread and the inner conical surface, is equipped with a collet clamp, the outer conical surface of which interacts with the inner th conical surface of the housing, a nut screwed onto the external thread of the housing, restrictive bushings mounted and secured in holes made in the wall of the housing between the color clip and the multi-stage stop, the profiled matrix is mounted on the machine with the possibility of longitudinal movement, for example, on a support, and has grooves for its quick removal.

In addition, in the device for crimping the ends of long pipes on a lathe, the number of restrictive bushings is selected from the condition of preventing the loss of stability of the long pipes inside the housing. The utility model proposed for protection ensures the operation of crimping the end of long pipes on universal, widely used lathes, has a small weight and cost. In addition, the stamp allows you to perform several operations without reinstalling the workpiece, such as crimping, bore holes and trimming the end.

Description

The invention relates to devices for cold processing of pipe billets by pressure, namely to dies for crimping pipe ends, in particular, aircraft pipelines.

Known horizontal releasable stamp containing the upper and lower strikers, the working part of which is machined in a closed state and corresponds to the shape of the compressed part of the pipe. To obtain the exact inner diameter of the compressed part of the pipe, a calibrating mandrel is placed in its cavity. The crimping operation is performed on a special machine, for example, type ZT-1. The strikers make a reciprocating movement, squeezing the end of the workpiece while gradually feeding it into the stamp. (A.I. Groshikov, V. A. Malafeev. Blanking and stamping work in mechanical engineering. M., Mechanical Engineering, 1976, p. 363, Fig. 12.8).

The disadvantage of the stamp in small batch production is the need to use narrowly specialized equipment that is difficult to load

economically sound amount of parts. In addition, before welding the part to the crimped end, it is necessary to trim it on a lathe.

Known stamp with bilateral support parts. (A.I. Groshikov, V. A. Malafeev. Harvesting and stamping work in mechanical engineering. M. Mechanical Engineering, 1976, p. 361, Fig. 12.6). The workpiece worn on the mandrel is protected against buckling by a sliding clip. The sphere on the insert is used to calibrate the internal cavity of the part. At the end of the compression, the matrix and the cage are returned to their original upper position by the press buffer through the ejector. Compression is performed on hydraulic or crank presses.

The disadvantage of these designs of dies with a large length of the workpiece is the need to use presses with a large closed height. Stamps are bulky and expensive. In addition, before welding the part to the crimped end of the pipe, it is necessary to trim it on a lathe.

The closest to the proposed technical solution can be considered a method of crimping the ends of the tubular billets, including pushing with an external support tube billet in the matrix (RF patent No. 2122914, B21D 41/04). To implement this method, a die is proposed that contains a tubular billet, a movable crosshead, a specially profiled matrix and a support in the form of a grease supplied to the gap between the tubular billet, the matrix and the movable traverse.

The disadvantage of this analogue is that when crimping long tubular workpieces, a large amount of grease is necessary to create a stable position of the workpiece during crimping, and in addition, it is necessary to increase the size of the stamp.

The task to which the proposed utility model is aimed is to expand technological capabilities by creating a device that allows crimping the ends of long pipes of small diameter on universal equipment, as well as reducing the cost of stamping equipment.

The problem is solved in that in the device for crimping the ends of long pipes on a lathe containing a retaining device for a pipe billet, a profiled matrix and an emphasis, the latter is multistage, one of the steps is equipped with a thread, the retaining device consists of a housing fixed in the machine chuck, one the end of which has an internal thread, a mating thread of the stop stage, and the other, an external thread and an internal conical surface, equipped with a collet clamp, the external conical surface which interacts with the inner conical surface of the housing, the nut screwed onto the external thread of the housing, restrictive bushings installed and fixed in the holes made in the wall of the housing between the collet clamp and the multi-stage stop, the profiled matrix is mounted on the machine with the possibility of longitudinal movement, for example, on a support , and has grooves for its quick removal.

In addition, in the device for crimping the ends of long pipes on a lathe, the number of restrictive bushings is selected from the condition of preventing the loss of stability of the long pipes inside the housing.

The figure shows a general view of the device for crimping the ends of long pipes on a lathe.

The device for crimping the ends of long pipes 1 on a lathe (not shown in the figure) contains a retaining device 2 for the pipe billet 1, a profiled matrix 3 and a stop 4.

The emphasis 4 has a multi-stage shape. One of the steps is equipped with thread 5.

The retaining device 2 consists of a housing fixed in the machine chuck, one end of which has an internal thread 6, a mating thread 5 of the stop level 4, and the other an external thread 7 and an internal conical surface 8.

The housing of the retaining device 2 is equipped with a collet clamp 9, the outer conical surface of which interacts with the inner conical surface 8 of the housing of the retaining device 2.

The nut 10 is screwed onto the external thread 7 of the housing of the retaining device 2.

The restriction bushings 11 are installed and secured, for example, by screws 12, in the holes 13 made in the wall of the housing of the retaining device 2 between the collet clamp 9 and the multi-stage stop 4. The number of restriction bushings 11 is selected from the condition of preventing the loss of stability of the long pipe inside the housing.

The profiled matrix 3 is mounted on the machine with the possibility of longitudinal movement, for example, on a support (not shown in the figure) and has grooves 14 for its quick removal, for example, using a fork puller 15.

The device for crimping the ends of long pipes 1 on a lathe works as follows:

In the collet clamp 9 and in the restriction sleeve 11 before interacting with a multi-stage emphasis 4, a workpiece is installed - a long pipe 1.

By screwing the multi-stage stop 4 along the thread 6 into the housing of the retaining device 2, the overhang of the long pipe 1 is regulated.

Then, a nut 10 is screwed onto the thread 7 of the housing of the retaining device 2, which acts on the end face of the collet clamp 9, the outer conical

the surface of which interacts with the inner conical surface 8 of the housing of the retaining device 2. There is a clamp long pipe 1.

The housing of the retaining device 2 is installed and secured in a three-jaw chuck of a lathe.

A profiled matrix 5, mounted, for example, on a machine support, is mounted on the free end of the pipe 1 and moved in the longitudinal direction, thereby compressing the end of the pipe.

Crimping is carried out without rotation of the workpiece, which ensures uniform distribution and a large degree of deformation, which is especially important for thin-walled pipes made of materials with low ductility. In this case, the restrictive bushings 11 make it possible to increase the stability of the long pipe inside the housing of the retaining device 2.

To remove the matrix 3 from the pipe 1 in the grooves 14 enter the fork of the puller 15, mounted in the tool holder of the machine (not shown). When the machine support moves, the puller 15 removes the matrix 3 from the crimped end of the pipe 1. Replacing the puller 6 with a cutter, you can cut the crimped end of the pipe 1, and, if necessary, grind its inner diameter.

Thus, the utility model proposed for protection ensures the operation of crimping the end of long pipes on universal, widely used lathes, has a small weight and cost. In addition, the stamp allows you to perform several operations without reinstalling the workpiece, such as crimping, bore holes and trimming the end.

Claims (2)

1. A fixture for crimping the ends of long pipes on a lathe, comprising a retaining device for a tube billet, a profiled matrix and a stop, characterized in that the latter is multi-stage, one of the steps is threaded, the retaining device consists of a housing secured in the machine chuck, one end which has an internal thread corresponding to the thread of the stop stage, and the other has an external thread and an internal conical surface, equipped with a collet clamp, the external conical surface of which is inter acts with the inner conical surface of the housing, a nut screwed onto the external thread of the housing, restrictive bushings installed and secured in the holes made in the wall of the housing between the collet clamp and the multi-stage stop, the profiled matrix is mounted on the machine with the possibility of longitudinal movement, for example, on a support, and has grooves for its quick removal. 2. The device according to claim 1, characterized in that the number of restriction sleeves is selected from the condition of preventing the loss of stability of a long pipe inside the housing.