SU1750798A1 - Machine tool for rolling out tubular blanks - Google Patents

Abstract

Use: metal forming. SUMMARY OF THE INVENTION 1 The machine comprises a frame, a spindle mounted thereon, a caliper with a forming tool and a supporting device. The supporting device was completed in the form of a sleeve mounted coaxially with the spindle in a bearing assembly on racks which are rigidly fixed on the guide frames. 2 yl

Description

The invention relates to the processing of metals by pressure, in particular to devices for running.

Known obkatnaya machine containing the frame drive spindle, which houses the chuck, and the drive unit of the clamping cartridge in the form of a power cylinder with a distributor, as well as the forming tool,

The disadvantage of the known machine is the impossibility of processing on it tubular blanks of any length.

The closest in technical essence is a machine containing main and additional spindles mounted on a bed, a support with a forming tool. This machine makes it possible to manufacture parts from pipes of almost unlimited length.

The disadvantage of the known machine is the complexity of its manufacture due to the presence of two drive spindles, one of them is equipped with an axial displacement drive.

The purpose of the invention is to simplify the design of the machine by eliminating the additional spindle.

This goal is achieved by that in the machine for rolling in tubular blanks containing the main spindle and supporting device mounted on the frame, the caliper with the forming tool instead of the supporting device coaxially with the main spindle on the racks is installed a sleeve in the bearing unit, with the base on which rigidly fixed rack.

The free-rotating sleeves are fixed on the guide beds And are designed to hold the workpiece from deflection and, at the end of the run-in, after separating the finished part from the fall. At the same time, free-rotating sleeves should provide another technological purpose: it should not prevent the axial sliding of the part during its processing, as otherwise it will cause thinning of the processed blanks.

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parts and parts in a pinch. In the prototype machine this problem is solved by using an additional spindle with a rigid clamp of the workpiece in the chuck jaws, but with the drive of axial movement.

In the art, it is known to use freely rotating sleeves that serve to provide support for parts or to provide axial movement.

The use of well-known sleeves allows for the implementation of a new function, i.e. to prevent thinning of the wall of the workpiece in the place of pinching during running, which leads to simplification of the machine design. The presence of sleeves does not completely solve the problem if the condition for the presence of a gap between the workpiece and the inner diameter of the sleeve was not fulfilled.

FIG. 1 shows a machine for running tubular blanks; in fig. 2 is a section A-A in FIG. one.

The machine contains a frame 1 with a hollow spindle 2, drive 3 spindles. The support 4 is mounted on the frame 1 with the possibility of movement, a block of tools 5 is fixed on it. In addition, heating devices installed in the form of inductor TB4 6 and 7 are installed on the Base. The workpiece is fixed in the cartridge 8. The feed mechanism 9 serves to feed the workpiece along the roller table to the machine and install it as far as it will go 10. Frame 11 has been installed. on rigidly mounted racks 12, the sleeves 14 freely rotating in the bearing unit 13 and located coaxially with the main spindle 2. The inner diameter of the sleeves 14 is within

d + 2A,

where d is the diameter of the workpiece;

2 A 4 A - permissible gaps between the workpiece 15 and the inner diameter of the sleeve 14. t

The work of the machine. The original billet-pipe 15 is fed through the roller table to the machine through the feed mechanism 9 and then pushed through step t, through the inductor 6, a hollow spindle 2, freely rotating sleeves 14 up to the stop 10. Next, the pipe 15 is fixed in the cartridge 8, the stop 10 is removed , include the drive 3 spindle rotation, inductor TB4 b and drive transverse caliper 4.

At the same time, the following operations are carried out at the same time: run-on of the clamp on the pipe-blank 15 by moving the cross slide 4 with the tool block 5 fixed on it; cut the finished part 16 from the workpiece 15; at a distance of feed increment t from the deformation zone heating

the annular section of the workpiece to the forging temperature (for steel - 1100-1200 ° C). After completing the above operations, the caliper 4 with the tool block 5 returns to its original position. Drive unit

the spindle 3 and the inductor 6 are turned off, the cams of the chuck 8 are expanded, the finished part 16 is removed from the sleeves 14, for example, by means of an electromagnetic gripping device mounted on the pneumatic cylinder stem mounted along the spindle axis (not shown), the stop is set again. 9, the pipe is fed through the spindle 3 in step ti until it stops 10 and the cycle repeats

For cases of running in parts whose length is less than the feed step c, and therefore less than the distance between the inductor 6 and the deformation zone (axis of the tool block 4), it is possible to feed the workpiece 15 from the side of the cartridge 8 (dotted arrows) Then to heat the workpiece 15 instead of the inductor 6 between the sleeves 14, the inductor 7 (shown as a dotted line) is placed at a distance of

feed step ta corresponding to the required length of the parts to be produced. Finished parts are pushed through the spindle during the next pipe feed.

The proposed machine allows

a significant simplification of the design to combine running in at the same time of the two ends of the workpiece, to divide (cut off) the run-in workpiece with the separation of the finished one. the details.

To distinguish the modifications of the machines, the special name OS-9 is adopted, which means: O - break-in C - machine. 9 - modification number.

Claims (1)

Invention Formula A machine for rolling in tubular blanks containing a spindle mounted on the frame, a support with a shaping tool and a supporting device, characterized in that, in order to simplify the design, the supporting device is designed as a sleeve mounted coaxially with the spindle in the bearing assembly on the uprights. made with guides on which the stands are rigidly fixed. 7 12 ten eleven 12 eleven AiA