Turning – Lathe – Carriage feed
Reexamination Certificate
1999-10-18
2001-05-29
Tsai, Henry (Department: 3722)
Turning
Lathe
Carriage feed
C082S154000, C082S158000, C082S161000, C082S110000
Reexamination Certificate
active
06237453
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to tool slides for use on screw machines, or the like, and more particularly to a novel tool slide which is suitable for use in either of two different operating positions on a multiple spindle screw machine. Even more particularly this invention is related to an improved dovetail tool slide and mounting means therefor including a dovetail expansion gib.
There are in use today a large number of machine tools which employ tool slides of the type in which a tool holder is mounted on a respective slide for reciprocation thereby toward and away from the work that is to be machined. Moreover, in many such machines the slide has thereon a dovetail shaped guide which is slidably mounted in a correspondingly shaped recess formed in the upper surface of a support bracket or base. Repeated reciprocation of the slide toward and away from the work tends to generate wear between the dovetail shaped guide and the walls of the recess in which the guide reciprocates. It is therefore customary to employ a longitudinally tapered brass gib between the guide and associated support properly to align the guide for reciprocation in the recess in the associated support, and also to compensate, when necessary, for excessive wear between the moving parts. Customarily the gib is secured to the support, so that the dovetail guide on the slide has one surface thereof sliding against a confronting surface on the associated gib thus causing wear on one or the other or both of the confronting, sliding surfaces. Consequently, to compensate for such wear it becomes necessary rather frequently to replace the worn gib, and to requalify both the guide surfaces and the walls of the recess to eliminate any undesirable running clearance and consequent lateral movement or play between the slide and the associated support.
Still another problem with certain screw machines of the type described is that each such machine utilizes two different slides, one such slide being mounted for operation in one area of the machine, say position A, and the other slide being mounted in another area of the machine, say at position B. While portions of these two slides are similar in configuration, each such slide is unique, and has provisions to accept tooling and operate in only one of two positions on the machine. Also, each slide is manipulated or reciprocated by a different mechanism, and therefore each such slide must have thereon a different mechanism for connecting the respective slide with the associated reciprocating mechanism. As a consequence, when one such slide wears out or must be replaced, care must be taken to make sure that the correct replacement part is ordered, since the slides are different, and a slide for position A cannot be employed in position B, and vice versa.
It is an object of this invention, therefore, to provide an improved tool slide of the type described which is designed for operation in either position A or position B of a machine of the type described, and therefore obviates the need for utilizing or maintaining two different slides for such a machine.
Another object of this invention is to provide an improved tool slide of the type described, which has mounted thereon two different coupling means, one of which is utilized to connect the slide to an operating mechanism of a screw machine when the slide is in one of two different positions on the machine, say position A, and the other of which coupling means is utilized for connecting the slide to another operating mechanism when the slide is located in position B on the machine.
Still another object of this invention is to provide an improved tool slide of the type described having a dovetail guide which is mounted in a correspondingly shaped recess in a slide support by means of a dovetail expansion gib, which can be readily adjusted to minimize running clearance between the dovetail guide of the slide and the associated support.
Other objects of the invention will be apparent hereinafter from the specification and from the recital of the appended claims, particularly when read in conjunction with the accompanying drawings.
SUMMARY OF THE INVENTION
An elongate, rigid slide support is disposed to be mounted in a screw machine in either of two different operating positions in each of which a plane upper surface of the support has therein, and, centrally thereof, an elongate, dovetail shaped recess. A tool slide which is reciprocable on the upper surface of the support longitudinally thereof has projecting centrally from a plane, bottom surface thereof, an elongate, dovetail shaped guide which is similar in configuration to and is slidably mounted in the dovetail shaped recess in the support. Secured in the dovetail recess of the support adjacent one side thereof, and slidably engaged with the confronting side of the dovetail guide of the slide, is an elongate dovetail expansion gib. An adjusting screw which extends through the center of the gib is rotatably adjustable to contract the length of the gib, causing the expansion of the sides of the gib, thereby adjusting the running clearance between the support and the reciprocable slide.
Mounted on the upper surface of the slide is a first coupling pin which is connected to a pivotal slide operating arm when the support is mounted in one of the two operating positions on the machine. Adjustably mounted in a bore formed in the side of the slide is a second coupling pin which is adjustable into and out of an operating position in which it projects from one side of the slide and into a reciprocable slide operating arm when the support is mounted in the other of two operating positions on the machine.
REFERENCES:
patent: 4114486 (1978-09-01), Hooker
patent: 4165661 (1979-08-01), Wasco, Jr. et al.
patent: 4947715 (1990-08-01), Council, Jr.
patent: 4995300 (1991-02-01), Kaplan et al.
patent: 5842395 (1998-12-01), Hall
Belpanno Sandro G.
Snow Jeffrey C.
C.J. Winter Machine Technologies, Inc.
Shlesinger Fitzsimmons & Shlesinger
Tsai Henry
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