SU944802A1 - Cutting tool holder with mechanism for removing tool - Google Patents

Description

(54) CUTTING HOLDER WITH MECHANISM OF A BRANCH

CUTTER

one

This invention relates to metalworking and can be used on multi-spindle and other lathes.

A known tool holder with a tool removal mechanism, comprising a housing, a spring-loaded tool holder rotatably mounted thereon, and a spring-loaded support element mounted on the housing so that it can be moved and cooperated with the rotating tool holder and the support 1 placed on the stationary part of the machine.

A disadvantage of the known tool holder is that in the position and during the cutting process the tool (cutter) is held only by the cutting force, and since the latter can be inconstant due to uneven allowance, as well as due to intermittent machined surface (e.g. the end face of the clutch, splined roller or sleeve, etc.), then the cutter vibrates, which adversely affects the quality of the work surface.

The aim of the invention is to improve the quality of the treated surfaces.

This goal is achieved by the fact that the swivel holder is provided with two screw stops mounted on opposite sides of its axis of rotation, with one stop designed to interact with the body and the other with a bevel formed on a spring-loaded support element.

FIG. 1 shows the holder in the machining position, general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 - holder

10 at the time of removal of the tool from the treated surface, general view; in fig. 4 - the holder with the removal of the caliper with the holder to its original position, general view.

Tool holder with retraction mechanism

15-cutter from the machined surface consists of a fixed (relative to the caliper) body 1, a rotary tool holder 2 and the axis of rotation 3, fixed with the help of nuts 4, screw stops: front 5 and

Claims (1)

2Q rear 6, support element 7, spring 8 for supplying the support element, two-arm lever 9, pivot axis 10, driver 11, stop 12 mounted on the stationary part of the machine, spring 13 for retracting the tool and fasteners bolts 14 and crackers 15. A cutter 16 is installed in the rotary tool holder. 16 for machining the part 17. The rotary tool holder 2 has the ability to rotate around axis 3. It has screw stops 5 and 6 for limiting the rotation, which determines the amount of retraction of the tool from the machined surface. The support element 7 has the ability to make a plane-parallel movement relative to the housing 1. The lever 9 is mounted on the axis 10 fixed in the housing 1. The stop 12 is adjustable in length and mounted on the fixed part of the machine 18. The retractable spring 13 constantly tends to turn the tool holder clockwise and keep p, zts in the allotted position. The tool holder works as follows. Mounted on a machine caliper and fastened with bolts 14 and breadcrumbs 15 of the tool holder and tool 16 are fed in the direction of arrow P. As the tool approaches the surface to be machined, the tool hits the metal. At the initial moment of incision of the tool, a cutting force P appears, which, compressing the spring 13, turns the tool holder 2 around the axis 3 counterclockwise until the screw 5 stops in the plane 19 of the fixed body 1. In this case, the rear stop 6 moves away from the plane 19, as a result a gap is formed between the abutment and the plane. The gap formed between the abutment 6 and the plane 19 instantly enters the supporting element 7 with a bevel under the action of the spring 8 and locks this abutment, thus forming a rigid system: the housing 1, the supporting element 7, the tool holder 2 with the fixed nym it cutter 16. In this locked position the tool holder moves the cutter all the way to its cutting (stroke). At the end of the working stroke, the double-arm lever 9, with one shoulder, reaches the stationary support 12, rests on it, rotates around the axis 10 and the second shoulder cooperating with the support element 7, removes the latter from under the support 6. After the support element has been withdrawn from under the support the feed of the toolholder with the caliper stops, and therefore, the cutting stops. With the termination, the force P disappears, and the spring 13 turns the tool holder 2 clockwise until the stop 6 touches the plane 19, while withdrawing the tip of the tool 16 from the machined surface. When the caliper with the tool holder is retracted (idle), the lever 9 moves away from the stop 12, and the element 7 remains in the retracted (initial) position due to the fact that it rests on the forming of the stop 6 at the point 20. In this position the tool holder remains until the cutter is supplied to the surface to be machined and to start cutting, after which the described cycle is repeated. The use of the proposed tool holder will improve the quality of products. Claims of the invention: A tool holder with a tool retraction mechanism, comprising a housing, a spring-loaded tool holder rotatably mounted thereon, and a spring-loaded support element mounted on the housing so that it can be moved and cooperated with the rotating tool holder and a support located on the fixed part of the machine, characterized in that , in order to improve the quality of processing, the swiveling tool holder is equipped with two screw stops installed on opposite sides of its axis of rotation, with one stop designed for engagement with the body of the holder, and the other with a bevel formed on a spring-loaded support member. Sources of information taken into account in the examination 1. US patent No. 1963023, cl. 82-25, 1931. f e 1