CUTOFF INSERT APPARATUS

• US 3,846,882 A
• Filed: 09/24/1973
• Issued: 11/12/1974
• Est. Priority Date: 11/29/1972
• Status: Expired due to Term

• Current Assignee: Manchester Tool Co. (Kennametal Incorporated)
• Original Assignee: William B. Stein
• Inventors: Stein, William B.
• Primary Examiner(s): Vlachos, Leonidas
• Application Number:
  US05/400,156
• Time in Patent Office: 414 Days
• Field of Search: 29/96,95R
• US Class Current: 407/87
• CPC Class Codes: B23B 2210/027 Means for adjusting the grooving inserts
• CPC Class Codes: B23B 2210/08 Tools comprising intermediary toolholders
• CPC Class Codes: B23B 27/045 with chip-breaking arrangements
• CPC Class Codes: B23B 27/1685 Adjustable position of the cutting inserts B23B27/1655 and B23B27/1681 take precedence
• CPC Class Codes: Y10T 407/2242 Screw
• CPC Class Codes: Y10T 407/227 with separate means to fasten tool seat to holder
• CPC Class Codes: Y10T 407/2282 including tool holding clamp and clamp actuator
• CPC Class Codes: Y10T 407/25 including cut off tool

Abstract

An improved metal cutoff apparatus that is characterized by the provision of an improved insert having added stability against lateral shifting and toppling and an improved support blade adapted to receive the same in supported relationship for cutoff purposes. The insert is characterized by being of generally relatively blade-like configuration throughout a substantial portion of its length from its cutting edge rearwardly, with the rear portion thereof being transversely widened and with the entire insert having a V-shaped bottom support surface. The top surface of the support blade is appropriately contoured in width to receive the same.

Claims

1. A cutoff tool comprising, A. an elongate tool holder having 1. a base portion and 2. a coextensive forward portion having a pocket formed therein;

B. a support blade 1. releasably secured in said pocket and 2. having a V-shaped support groove in its upper surface and 3. having a central portion and an end portion, with said central portion being approximately double the thickness of said end portion;

C. a cutting insert having 1. a base portion with a. a length and width dimension and b. a V-shaped bottom surface and 2. a cutting portion projecting coextensively from said base portion of said insert and having a. a length and width dimension and b. a V-shaped bottom surface that is coplanar with the bottom surface of said base portion of said insert;

D. the width dimension of said cutting portion being substantially less than the width dimension of said base portion whereby said cutting portion of said insert can be supported on said end portion of said blade while said base portion of said insert is supported on said central portion of said blade;

E. the length dimension of said cutting portion being a substantial multiple of the length dimension of said base portion;

F. said insert being releasably and adjustably receivable on the V-shaped support groove of said support blade; and

G. a clamp member releasably receivable on said forward portion of said tool holder in overlying relationship to said insert 1. whereby said insert may be held on said support blade.

2. a cutting portion projecting coextensively from said base portion of said insert and having a. a length and width dimension and b. a V-shaped bottom surface that is coplanar with the bottom surface of said base portion of said insert;

D. the width dimension of said cutting portion being substantially less than the width dimension of said base portion whereby said cutting portion of said insert can be supported on said end portion of said blade while said base portion of said insert is supported on said central portion of said blade;

E. the length dimension of said cutting portion being a substantial multiple of the length dimension of said base portion;

F. said insert being releasably and adjustably receivable on the V-shaped support groove of said support blade; and

G. a clamp member releasably receivable on said forward portion of said tool holder in overlying relationship to said insert

3. The tool of claim 1 wherein said clamp member includes at least one localized bearing area that bears on the top surface of the base portion of said insert.