SU380404A1 - CONTINUOUS PROFESSIONAL MACHINE - Google Patents

Description

I

The invention relates to a machine tool industry, in particular for the continuous machining of parts, for example spanners, in which cutting tools mounted on sliders continuously move in guides or workpieces that are moved relative to fixed tools.

A continuous-stretching machine is known that includes successively located along a closed path made in the form of rigid guides, carrying tools of a slider, which move in the cutting zone by means of a subsequent slider with a rail on a non-working surface interacting with a driving rack gear.

In the known machines, due to the selection of the play in the guides with spring-loaded plungers at high speeds and cutting forces, the wear resistance of the rollers of the plungers becomes insufficient. In order to fully or partially compensate for the pressing force of the slider, in the zone of its engagement with the rack bristles, additional frost pressure is set to narrow the technological capabilities of the machine.

The purpose of the invention is to reduce the overturning moment acting on the crawler in the treatment area.

For this, in the proposed machine, the pushes on the front and receptive protrusions on the rear ends of the sliders are made with bevels that are in contact with each other, and the pressure device can be made in the form of a rolling roller bearing with elastic rollers, the permissible deformation of which is several times greater than the tolerance for distance cross transverse

the cross section between the runners,

FIG. 1 shows the proposed machine, the cross section; in fig. 2 is a section along A-A in FIG. one.

The continuous-continuous machine consists of

slider / continuously moving along an oval path. In the working rectilinear area, the crawlers have rigid guides in the form of roller bearings. Three roller bearings 2 are basic.

The roller bearing 3 has elastic rollers 4. The runners. The crawlers have the shape of a dovetail. On the back side of the sliders, the teeth of the slats are cut. Using the slider, the slider alternately meshes with the pinion gear 5. When the slider in the working area engages, the slider moves the previous slider through the front pushing protrusion. On ho .-: the rest of the area is moved by a chain of 6.

The links of this chain connect the sliders to each other.

with a friend. Located near the ends of the machine bed 7 of the machine, two pulleys serve as a direction for the movement of the chain and slide along the oval path.

The base roller supports 2 are mounted and fixed directly on the base 7, and the support 3 with elastic rollers is mounted in the bracket 8, which is fixed and fixed to the base H1-pins 9 and screws 10. On the front side, the sliders have a depression 1 and slots for positioning, fixing and fastening quick-release holders // with tool 12 or vice with workpieces 13.

In addition to the overturning of its moment caused by the SF cutting forces, the squeezing force P, / from the pinion gear 5 acts on the slider, the reduction of the overturning moment is achieved due to the shape of the pushing 14 and perceiving / 5 cusps of the sliders.

The contact between the master and the driven slider is transmitted through the inclined planes of the protrusions at an angle a, as a result of which the force generated during the cutting process is transmitted to the slider which is engaged, at an inclination that passes through the reference plane OP of the slider on the roller bearings 2 and partially balances the moment, out of the position of the pressing force P in the process of gearing.

A significant reduction in the tilting moment at the engaging slider allows you to remove the pushing spade from the contact bridge of the pinion gear teeth with the slider, and thus significantly lower the shoulder from the specified protrusion to the line of the cutting force X / ii; is n1, eG | s -in the cutting zone. The reduction in overturning moments on the sliders significantly reduces the amount of clamp required to provide a backlash-free chain between roller bearings 2 and 3. The possibility of loosening the preload in the base 2 and elastic 3 roller bearings has a favorable effect on the increased wear resistance of the roller bearings and the creepers.

The value of the allowable deformation of the elastic rollers 4 of the roller bearing 3 should be several times greater than the tolerance for the distance in the cross section between the runners of different sliders in the same set, due to which, with the preload of the roller 3, the bearing 3 with the rollers 4 provides almost uniform pressing all the sliders on

working straight line conveyor. The flaps 16 on the sliders protect the runner of the sliders and the roller bearings from getting chips on them.

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Subject invention

Claims (2)

1. A continuous-stretching machine with a pressing device for backlash-free linear movement along a roller rolling guide of sliders carrying tools whose movement in the cutting zone is carried out by means of end protrusions that are mounted on the slits that have a non-working rail surface that interacts with Rack and pinion gear, characterized in that, in order to relieve the overturning MOMeirra acting on a skid in the cutting zone, the pods are pushed on the front and). the ends of the sliders are made with bevels in contact with each other. 2. The machine according to p. 1, oggpcha: 1Ts1 / 11C so that the gimbal ycrpoficTii;) sh.shone c and v.che roller kacheni with elastic po.iHkami, magnitude1P donusimo || dofop aiu and which are several times larger than the tolerance for the distance in the cross section between) and the frost of the sliders. it iii: nxjril. /) i GM