SU1222465A1 - Spindle headstock for friction welding machine - Google Patents

Description

one

The invention relates to the field of welding and can be used to create equipment for friction welding.

The purpose of the invention is to increase the reliability and expand the technological capabilities of the structure by increasing the axial load.

The drawing shows a spindle head, tires for friction welding, a section.

The spindle head of the friction welding machine contains spindle 1 mounted in housing 2 on radial bearing supports 3, and axial force bearing unloading unit, made in the form of a set of thrust bearings 4-6, the rings of which are connected to gears 7-9, interacting with gears 10-12, mounted on a common shaft 13, housed in the housing 2.

The device works as follows.

During the welding cycle, radial loads from spindle 1 on housing 2 are transmitted through radial bearing blocks 3, and axial loads through a set of thrust bearings 4-6.

Rotation from spindle 1 is transmitted to the first bearing ring 4 and through gears 7 and 10 to shaft 13. Gears 11 and 12 are also mounted on shaft 13, which through gears 8 and 9 transmit rotation to the rings of the entire set of bearings. If the axial force bearing unloading assembly contains more thrust bearings than is shown in the drawing, then similar transmissions of rotations occur from the subtype ring. Nick 4, connected to the spike 1, through the corresponding gears and shaft 13 to the thrust bearing rings of the whole set except the last ring connected to the housing 2.

1222465r

to a non-rotating ring associated with body 2. This reduces the relative peripheral velocities of the thrust bearing rings. The optimal gear ratios of the interacting gear pairs are chosen such that the relative circumferences of the speeds of the rings of all bearings are the same and are where uj is the spindle rotational speed, N is the number of thrust bearings in the set.

When designing gear 1X pairs of the unloading unit, the problem arises of determining the optimal speed of rotation of each gear connected to the bearing rings. To do this, type: speed

ten

15

20

25

gear rotation, 7 uj - “J, gear rotation speed 8 aj tj-uJ / i; gear speed 9 uJ -oj- - N

Then the optimal rotation speed of the calculated gear is

where h is the sequence number of the calculated gear when counting from the gear,

30 in contact with the spindle (from right to left on the drawing).

The proposed design of the headstock can significantly reduce the relative circumferential

35 speeds of thrust bearing rings, which increases their durability and reliability in operation ..

In addition, the spindle head allows welding to be performed at high spindle revolutions with the simultaneous perception of considerable axial force due to the simultaneous perception of it by all rolling elements of the unloading unit,

45 which expands the technological capabilities of the welding machine.

The proposed pa3rpy3 kn bearing assembly from axial force eliminates contact slippage. The transmission ensures rotation of all bearing rings in one direction, and the gear ratio of gear pairs is chosen so that the absolute speeds of bearing rings gradually decrease: from the frequency of rotation of the ring connected to the spindle one,

VNIIPI Order 1649/13 Branch P1I1 1prtcht, g

gear rotation, 7 uj - “J, gear rotation speed 8 aj tj-uJ / i; gear speed 9 uJ -oj- - N

Then the optimal rotation speed of the calculated gear is

where h is the sequence number of the calculated gear when counting from the gear,

in contact with the spindle (from right to left on the drawing).

The proposed design of the headstock can significantly reduce the relative circumferential

speeds of thrust bearing rings, which increases their durability and reliability in operation ..

In addition, the spindle head allows friction welding at high spindle speeds with simultaneous perception of significant axial force due to the simultaneous perception of it by all rolling elements of the unloading unit,

which expands the technological capabilities of the welding machine.

The proposed pa3rpy3 kn unit of bearing supports from axial force eliminates slippage of contact surfaces associated with wear and heat, which increases the reliability of the welding machine.

The design of the proposed bearing unloading unit allows an increase in the perceived force by 40%.

Claims (2)

SPINDLE BOTTOM OF A FRICTION WELDING MACHINE, comprising a spindle mounted in a housing on radial bearings and a bearing support unloading unit from the axial force, distinguishing ·· that in order to increase the reliability and expand the technological capabilities of the structure by increasing the axial load, the bearing unloading unit the bearings from the axial force are made in the form of thrust bearings coaxially mounted on the spindle, rigidly mounted on their gear rings and fixed in the housing parallel to the axis of the shaft spindle with JCOMM attached to it gears interact with gears mounted on the spindle. 2 13 1Z IU