摘要:
A cutting device and method for its operation are utilized to apply variably canted threads to a screw blank. A conventional cutting lathe is provided with a conventional hydraulically operated adjustable cutting support attached thereto. A guide plate is generally mounted upon the lathe adjacent the armature, which is guided therealong to produce a particular pattern in the workpiece. The armature is pivotable to permit cutting at particular angles into the surface of a workpiece. A secondary guide is utilized in producing a controlled variable pivot of the cutting armature during its progression along the body of the workpiece. The secondary guide is rigidly mounted to the adjustable cutting armature and precisely controls its movement during the cutting operation, producing a cutting operation having dual movement characteristics. The cutting armature is moved longitudinally along the axis of the workpiece which simultaneously rotating about its pivot point to create a change in cutting angle over the length of this screw blank body. In order to produce the variably canted threads on a screw body having a tapered core, a preliminary cutting operation is first performed on the screw blank according to the traditional operation of the adjustable cutting support in which the cutting depth of the armature is changed over the course of the cutting operation. This preliminary cutting step permits the combination of the tapered core of the screw body and the variably canted threads.
摘要:
A new and distinct variety of Hybrid Tea rose plant is provided which forms in abundance attractive fully double blossoms which exhibit a long vase life. The blossoms are currant red on the upper surface and light cardinal red on the lower surface. The plant exhibits an erect growth habit, vigorous vegetation, and is well adapted for cut flower production in a greenhouse. Good resistance to fungal diseases also in manifest.
摘要:
A variable follower rest for a lathe for supporting tapered shafts and similar shafts of varying diameter as they are being turned. The follower rest includes a bearing arm above and another bearing diametrically opposite to the cutting tool to resist the lift and thrust of the cutting tool against the shaft. Through master-slave actuators the bearing arms move towards and away from the center of the shaft in unison with corresponding movements of the cutting tool to always engage the shaft as the diameter of the shaft varies.
摘要:
A cross slide turning tool holder has a body with a mounting post passing from top to bottom therethrough, the body having first and second members pivotally attached by the mounting post, the first member having "L" shape with a leg of the "L" horizontal below the second member and another leg of the "L" upright at an end of the second member and threadedly carrying a pair of screws bearing on the second member as angle adjusters, and adjustment block is carried in a dovetail in the second member with a portion extending into a groove where a spring laterally biases it, a roller has attachment for urging the adjustment block, which adjustment block has an upright dovetail structure slidably carrying a tool holding block which has a vertical adjustment setting provision. Embodiments provide for respective direct and reverse motion.