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Spade drill insert having helical margins

A plug-in, edge technology, applied in the field of flat drill plug-ins with helical edges, can solve the problems of shortening the life of the plug-in and reducing the cutting speed, etc.

Active Publication Date: 2006-12-06
ALLIED MASCH & ENG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another problem with some prior art spade drill inserts with large rims is that the edge surface area rubs against the sides of the hole as the spade drill rotates, causing additional heat to build up on the insert, which requires reduced cutting speeds and can shorten the plugin lifespan

Method used

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  • Spade drill insert having helical margins
  • Spade drill insert having helical margins
  • Spade drill insert having helical margins

Examples

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Embodiment Construction

[0016] Now introducing the first embodiment of the present invention, figure 1 A drilling tool assembly 10 is shown. The drilling tool assembly 10 includes a holder 12 having a body 14 and a head 16 . In the first embodiment, the retainer 12 has a generally cylindrical shape with a first end 20 and a second end 22 . Such as figure 2 As shown, the first end 20 of the retainer 12 has a catch or retaining groove 30 extending the entire diameter of the head 16 , or at least a central portion where the axis of rotation 18 of the retainer 12 lies. The retaining groove 30 has a bottom wall 32 , which is positioned substantially normal to the axis of rotation 18 of the retainer 12 . In the illustrated embodiment, the assembly 10 also includes a locating tab or engagement pin 24 precisely positioned relative to the axis 18 and extending from the bottom wall 32 of the retaining slot 30 . The pin 24 may be secured within a bore 26 extending downwardly from the bottom wall 32 of the ...

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PUM

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Abstract

A spade drill insert and drilling tool assembly is provided wherein the lands of the spade drill insert have helical margins which provide increased stability during cutting operations. The margin may have a helical trailing side or leading side, a parallel helical margin, or may also include a gullet or flute adjacent the helical margin.

Description

technical field [0001] The present invention generally relates to a spade drill insert placeable in a tool holder for drilling holes in metal. In particular, the present invention relates to a spade drill insert having a helical edge that improves stability during cutting operations. Background technique [0002] Drill systems are commonly used to provide cylindrical holes in metal workpieces. The cutting or drilling action of the drill system is accomplished by an elongated, generally cylindrical drilling tool, such as a drill holder and a spade insert assembly, the spade insert being selectively attached to the holder. Such a mechanism is then applied in which one end of the holder is fixedly fixed to a drive means, which enables rotation of the holder about its longitudinal axis. At the opposite end of the elongated bit holder, the cutting insert contacts the material being cut. Alternatively, the workpiece may be rotated relative to the holder and cutting insert, such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B51/00B23D77/00B27G15/00
Inventor T·G·斯托基G·费格尔J·P·努兹W·E·马斯特
Owner ALLIED MASCH & ENG CORP