SU413716A1 - Machine for making crimps on tube blanks - Google Patents

Description

The invention relates to equipment used in the manufacture of metal hoses and ring and screw corrugations from tubular blanks.

A known machine for the formation of corrugations on tubular blanks, comprising two heads rotating around the axis of the blank and forming bodies evenly spaced around the circumference, some of which are located in the cavity of the blank and installed in one head, and the other part is located on the outside of the blank. brackets with protrusions located in another head.

However, in a known machine, the workpiece must be clamped before the formation of corrugations, in addition, there is no mechanism for adjusting the forming bodies to the required diameter. increases the processing cycle of the workpiece and shines machine productivity.

For P (production of the machine, the proposed machine is a sabzhen adjustment mechanism for forming bodies located on the outside (I | of the side of the workpiece to the required diameter, and each forming body is made temporarily and, at the point of contact with the workpiece, has a linear velocity equal to but opposite to the corresponding forming body located in the cavity of the workpiece. The adjustment mechanism is made in the form of swivel nuts mounted in the head and mated, respectively, with a protrusion of one of the brackets eynov having threads and schtift mounted radially incoming protrusion and the free end in a groove formed in the head at an angle to the projection axis.

FIG. 1 shows the kinematic scheme.

the proposed machine; in fig. 2 - liner. The machine includes an inner 1 and an outer 2 head, rotating around the core of the workpiece, a gearbox 3 with interchangeable shchestren mn, a differential drive 4, a gearbox 5 n electric motor 6.

The inner head contains a rod 7 with a shaft 8 placed inside it, on which three axes 9 are mounted, which are turned at the calculated angles to the axis of the head. At the ends of the axles 9 mounted gears 10, coupled

with a gear wheel 11 fixedly attached to the end of the rod 7. Axes 9 also have forming bodies 12 for forming screw and ring corrugations made in the form of rollers or screws. The rotational drive of the shaft 8 is driven by the electric motor 6 through the gearbox 5. The sequence is hinged on the machine bed 13 in the bearings 14 and has the ability to rotate in a plane perpendicular to the axis of the internal head. To fix the angular and younger gear 5, use latch 15.

In the case 16 of the outer head, three brackets 17 are mounted with forming bodies 18, also made in the form of rollers or screws.

The drive units 18 are driven by satellites 19 coupled to the gear wheel 20.

Gearbox 3 with interchangeable gears 21-24 is kinematically connected with gears 25 and 26 to gear wheels 20 and 27 of differential drive 4.

A wheel 20, provided with internal and external teeth, is mounted on slide bearings in spindle 28 of actuator 4. And performs the function of a correction link.

The wheel 27 is rigidly mounted on the spindle; lene 28, connected with the housing 16 of the outer head, and performs the function of the carrier; In the housing 16 of the outer head there is a mechanism for adjusting the forming bodies to the required diameter of the workpiece 29. The mechanism includes cylindrical scabies 30, cylindrical -conical wheel 31 and three conical pin-nuts 32, fixed in the housing 16 and having a trapezoidal thread. Each bracket 17 is provided with a protrusion 33, on which a trapezoidal thread is also made. The brackets 17 with the protrusions 33 are screwed into the pin-nuts 32. In the case 16, holes with keyways are made. In the holes, the ends of the protrusions 33 are placed, and in each keyway it is fixed along the insert 34. In the inserts 34, which are angled to the axis of the protrusion 33, is perfectly aligned along the groove 35. In each groove there is a protruding part of the pin 36 installed in the projection 33 along the the radius and holding the bracket 17 from rotation around the axis of the protrusion during the rotation of the gear-nuts 32.

The motor 6, through the gearbox 5, drives the shaft 8 with the gears 10, which, being engaged with the wheel P, is driven by the forming bodies 12 of the internal head. In this case, the condition must be met

d

UFO

 and

10a p

where Zio is the number of gear teeth;

Zi - the number of teeth of the wheel;

 the outer diameter of the molds of the organs of the inner head;

d-rp is the billet diameter.

This condition is met by changing the molding bodies 12 of the inner head. From the gearbox 5, the rotation is transmitted to the gearbox 3 with interchangeable gears, and through it to the gear wheels 20 and 27. The wheel 27 transmits rotation to the outer head housing 16, and the wheel 20 to the satellite 19 mounted on the spindle bearings 28. The satellite 19 is in turn driven t in rotation forming bodies 18 of the outer head. In this case, the following equality must be observed.

24-22:

14 ./

° NfO 20

provided that the gear ratio of the gearbox 5 is equal to unity (15 1), where Zi, Z20, Z2I, Z22, Z23, Z24 is the number of teeth of the corresponding gear gears;

nfo-outer diameter of the forming organs of the external head.

Equality is maintained by the selection of replacement gears 21-24.

Under these conditions, at the point of contact of the forming bodies of the outer and inner heads with the billet, there is no slippage, which allows us to refuse the mechanism to prevent the tubular billet from rotating when the corrugations are formed. The forming bodies of the heads roll over the workpiece, the shape of the corrugations and at the same time move the workpiece along the axis.

If the molding is performed by rollers, then screw corrugations are produced on the billet, but if they are worms, then annular corrugations are obtained. The resulting product is removed from the machine when the lock that connects rod 7 and gearbox 5 is opened. Since the design of flexible metal hoses in a certain size range has the same profile and different elevation helix of the corrugation, you can use the same forming tool, adjusting it to another diameter meter and change the angle of rotation of the axis 0 of the tool relative to the axis of the workpiece.

During rotation of the hinge 30, simultaneous convergence or dilution of the forming bodies 18 fixed to the brackets 17 occurs due to the axial movement of the protrusions 33 relative to the rotating gear-nuts 32. At the same time, the pins 36 mix along the slots 35 of the liners 34. If the notches of the liners run parallel to m vysturov (y 0), the brackets 17 will move without rotation. Since B proposes the grooves at an angle to the axes of the protrusions of the machine, the movement of the brackets is accompanied by their automatic rotation around the axis.

Claims (1)

1. A machine for the formation of corrugations on tube blanks containing two heads rotating around the axis of the blank and carrying uniformly arranged bodies around the circumference of the blank, some of which are located in the cavity of the blank and mounted in one head, and the other part is located on the outer side of the blank on brackets with protrusions, and in another head, characterized in that, in order to increase productivity, the machine is equipped with a setting mechanism for forming bodies located on the outer side of the workpiece, to the required diameter, and each forming body is made driving and at the point of contact with the workpiece has a linear velocity, equal to