Ultra-precise boring cartridge and adjustment device therefor

Patent metadata

Field	Value
Publication number	US-10076790-B2
Application number	US-201615219943-A
Country	US
Kind code	B2
Filing date	Jul 26, 2016
Priority date	Jul 26, 2016
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

An ultra-precise boring cartridge and an adjustment device is disclosed. The boring cartridge includes a cam, a cam follower contacting the cam by a sloped portion, and a spring arrangement exerting a biasing force against the cam follower. The adjustment device includes a graduated dial affixed to an annular sleeve having a hexagonal-shaped end engaged with the boring cartridge. In an embodiment, a dial of the boring cartridge is rotated in increments of about 3.6° by the adjustment device, which causes movement of about 0.005 mm of the cam in a X-direction and movement of about 0.001 mm of the cam follower in a Y-direction, thereby selectively adjusting a machining radius of a cutting insert mounted on the cam follower.

First claim

What is claimed is:

1. An ultra-precise boring cartridge, comprising:
a housing;
a dial rotationally mounted within the housing;
a cam having a threaded portion, wherein rotation of the dial causes linear movement of the cam;
a cam follower contacting the cam by a sloped portion that is inclined at an angle with respect to a plane parallel to an X-axis; and
a spring arrangement exerting a biasing force against the cam follower,
wherein rotation of the dial in a clockwise direction causes movement of the cam in a first X-direction and movement of the cam follower in a first Y-direction, and
wherein rotation of the dial in a counterclockwise direction causes movement of the cam in a second, opposite X-direction and movement of the cam follower in a second, opposite Y-direction due to the biasing force exerted by the spring arrangement against the cam follower, and
wherein movement of the cam follower in the first and second Y-directions selectively adjusts a machining radius of a cutting insert mounted on the cam follower.

2. The boring cartridge according to claim 1 , wherein the sloped portion has an angle of between about 5° and about 15° with respect to the plane parallel to the X-axis.

3. The boring cartridge according to claim 1 , wherein:
movement of the cam in the first and second X-directions over a first distance causes a movement of the cam follower in the first and second Y-directions, respectively, over a second distance which is smaller than the first distance.

4. The boring cartridge according to claim 3 , wherein movement of the cam of about 0.005 mm in the first and second X-directions causes a movement of the cam follower of about 0.001 mm in the first and second Y-directions, respectively.

5. The boring cartridge according to claim 1 , further comprising a biasing member for providing a biasing force against the cam to eliminate any clearance between the cam and the dial.

6. The boring cartridge according to claim 1 , wherein the spring arrangement comprises a pair of springs separated by a hold pin which prevents movement of the pair of springs in a direction other than the first and second Y-directions.

7. The boring cartridge according to claim 1 , wherein the dial includes a hexagonal-shaped recess accommodating a hexagonal-shaped end of an adjustment device.

8. The boring cartridge according to claim 1 , comprising:
at least one element which applies a preload to the spring arrangement;
wherein the at least one element is stationary with respect to the housing.

9. The boring cartridge according to claim 3 , wherein the second distance is one-fifth of the first distance.

10. The boring cartridge according to claim 6 , wherein the hold pin prevents movement of the pair of springs in either of the first and second X-directions.

Assignees

• Kennametal Inc

Inventors

• Marcelo Euripedes Silva

Classifications

• B23B29/0341 Primary

  Cartridges · CPC title

• B23B2260/02

  Cams · CPC title

• Y10T408/858

  Moving means including wedge, screw or cam · CPC title

• B25B13/48

  for special purposes · CPC title

• B23B2270/36

  Identification of tooling or other equipment · CPC title