Vibration threading lathe for precision screw cutting
AssigneesPilot Man-Nen-Hitsu Kabushiki Kaisha, Yugen Kaisha Shindo Sessaku Kenkyusho
InventorsTatuo Sotome, Fumio Yokoi
Life of this patent
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Abstract
A vibration threading lathe has a cutting tool vibrated by an ultrasonic vibrator and supported by a tiltable frame which is so tiltable that the cutting tool can be inclined at the lead angle of the screw thread. As a result, screw cutting can be accomplished with remarkably low resistance to cutting, without burrs, and with a remarkably low rate of abrasive wear of the cutting tip. This lathe is highly suitable for threading articles of difficult-to-machine materials such as stainless steel, titanium, and beryllium copper, and particularly tubular articles of small diameters and having thin walls.
Claims8
A vibration threading lathe for precision screw cutting, comprising:
- a main spindle having a hollow interior and a chuck at one end thereof;
- a blank feeding device for feeding blanks one-by-one through said hollow spindle from the other end and to said chuck to be held thereby at said one end of said main spindle;
- means for rotatably driving said main spindle;
- a travelling carriage assembly on said lathe adjacent said one end of said main spindle and having a saddle mounted thereon for movement in the axial direction of said main spindle, means connected with said saddle for moving said saddle toward said main spindle at a speed corresponding with the pitch of the screw threads being cut, a cross slide mounted on said travelling carriage for movement perpendicular to the direction of movement of said saddle, and carriage control means for controlling the movement of said saddle and said cross slide;
- a tool rest mounted on said cross slide and having a tiltable frame;
- a cutting tool mounted in said tiltable frame, said tiltable frame being adjustably mounted on said tool rest for adjustment of the position thereof relative to said tool rest for varying the position of the cutting tip of the cutting tool relative to a blank held in said chuck;
- and
- a vibrator mounted on said cross slide and coupled to said cutting tool for causing said cutting tool to vibrate during the screw cutting operation thereof.
Dependencies are inferred from the claim text.