Method of forming a recess in a work

• US 20080295561A1
• Filed: 05/27/2008
• Published: 12/04/2008
• Est. Priority Date: 05/26/2007
• Status: Active Grant

• Current Assignee: Nakamura Seisakusho Kabushikigaisha
• Original Assignee: Nakamura Seisakusho Kabushikigaisha
• Inventors: Miyahara, Hideyuki
• Granted Patent: US 8,702,359 B2
• Time in Patent Office: Days
• US Class Current: 72/332
• CPC Class Codes: B21J 5/068 Shaving, skiving or scarifying for forming lifted portions, e.g. slices or barbs, on the surface of the material
• CPC Class Codes: B23D 5/00 Planing or slotting machines cutting otherwise than by relative movement of the tool and workpiece in a straight line
• CPC Class Codes: B23D 79/00 Methods, machines, or devices not covered elsewhere, for working metal by removal of material by combined operations B23D81/00; cutting by electron-beam B23K15/00, by laser beam B23K26/00; by electro-erosion B23H; tool holders for machine tools B23Q3/00; handles for hand implements B25G
• CPC Class Codes: B26D 3/08 Making a superficial cut in the surface of the work without removal of material, e.g. scoring, incising
• CPC Class Codes: B26D 3/28 Splitting layers from work; Mutually separating layers by cutting B26D3/30 takes precedence; Recovery of plastics or other constituents of waste material containing plastics B29B17/00
• CPC Class Codes: Y10T 409/50082 Process
• CPC Class Codes: Y10T 409/501148 with product handling means
• CPC Class Codes: Y10T 409/502624 Means for cutting groove
• CPC Class Codes: Y10T 409/506396 Reciprocating cutter horizontally
• CPC Class Codes: Y10T 83/0304 Grooving

Abstract

In a method of forming a recess in a work, a work (1) in which the recess is to be formed is a material that can be cut. A cutting tool (10) for forming the recess is held by a moving apparatus at a prescribed angle relative to the work (1). In a fin-forming step, the cutting tool (10) is moved in a carving direction for carving the work (1) at the prescribed angle, and a thin cutting fin (3) is vertically formed. In a cutting step, the cutting tool (10) is moved in the horizontal direction, and the cutting fin 3 is cut and separated from the work 1. The fin-forming step and the cutting step are repeatedly performed in sequence, whereby a recess (2) having a prescribed depth d and area is formed in the work (1). A recess having the prescribed depth can be readily formed in the surface of the work while applying little stress, even when the area is large.

Claims

1. A method of forming a recess in a work, wherein a cutting tool having a blade part formed on a distal end is held at a prescribed angle relative to the work composed of a cuttable material, the cutting tool is moved in a relative manner in a carving direction in which the work is carved by the cutting tool at a prescribed angle and is moved in a horizontal direction, and a recess is formed in the work, the method being characterized in:

forming a recess having a prescribed depth in the work using a fin-forming step for moving the cutting tool in the carving direction, carving the work using the blade part, and vertically forming a thin cutting fin, and a cutting step for subsequently moving the cutting tool in the horizontal direction, and cutting a proximal end of the cutting fin, thereby separating a scrap; and

forming another recess using the cutting step and the fin-forming step for causing the cutting tool to move in a relative manner from an upstream side in an amount of a forming pitch in the carving direction and in the horizontal direction relative to a worked surface formed by vertically forming the cutting fin, after which the fin-forming step and the cutting step are repeatedly performed in sequence, and the recess having a prescribed depth and area is formed in the work.

2. The method of forming a recess in a work according to claim 1, wherein

a width of the cutting tool is formed to be equal to a width of the recess formed in a prescribed location in the work;

the fin-forming step and the cutting step are repeatedly performed in sequence using the cutting tool on the work; and

the recess, which has the prescribed depth and width, is formed in the work.

3. The method of forming a recess in a work according to claim 2, wherein, in the fin-forming step, when the cutting tool is used to carve the work and vertically form the cutting fin, a thickness of the proximal end of the cutting fin is formed so as to become successively thinner towards a tip thereof, at least both sides of the proximal end of the cutting fin are made to protrude, and the scrap cut in the cutting step is held by being sandwiched between internal walls of the recess.

4. The method of forming a recess in a work according to claim 1, wherein, after a channel having a prescribed depth and width is formed in advance in at least one end of a planned location for forming the recess in the work, the blade part of the cutting tool is moved and made to cut in the carving direction a plurality of times until reaching a bottom surface or the vicinity of the bottom surface of the channel, whereby a worked surface is formed slanting from the bottom surface of the recess to a surface of the work, and the recess is formed using the cutting step and the fin-forming step for causing relative movement of the cutting tool from the upstream side in the amount of the forming pitch in the carving direction and in the horizontal direction relative to the worked surface, after which the fin-forming step and the cutting step are repeatedly performed in sequence, and the recess having a prescribed depth and area is formed in the work.

5. The method of forming a recess in a work according to claim 1, wherein a step is performed one or a plurality of times for moving the cutting tool in the carving direction and forming a fin whose proximal end is linked to the work on an end of a planned location for forming the recess in the work, until the blade part reaches a prescribed depth, whereby the worked surface is formed slanting from the prescribed depth to a surface of the work.

6. The method of forming a recess in a work according to claim 5, wherein a step is performed one or a plurality of times for moving the cutting tool in the carving direction and forming a fin whose proximal end is linked to the work on an end of the planned location for forming the recess in the work, until the blade part reaches the prescribed depth, after which the cutting tool is made to face the opposite direction and is moved in the carving direction, and a plurality of the fins are cut and thereby separated, whereby the worked surface is formed.

7. The method of forming a recess in a work according to claim 1, wherein a narrow recess that is narrower than the recess that has a prescribed width and that is to be formed in a planned location in the work is formed by the cutting tool, which has a smaller width than the recess;

this narrow recess is formed in a plurality of rows; and

the recess having a wide prescribed width is formed.

8. The method of forming a recess in a work according to claim 7, wherein, after a channel having a prescribed depth and width is formed in advance in at least one end of the planned location for forming the recess in the work, the blade part of the cutting tool is moved and made to cut in the carving direction a plurality of times until reaching a bottom surface or the vicinity of the bottom surface of the channel, whereby a worked surface is formed slanting from the bottom surface of the recess to a surface of the work, and the recess is formed using the cutting step and the fin-forming step for causing relative movement of the cutting tool from the upstream side in the amount of the forming pitch in the carving direction and in the horizontal direction relative to the worked surface, after which the fin-forming step and the cutting step are repeatedly performed in sequence, and the recess having a prescribed depth and area is formed in the work.

9. The method of forming a recess in a work according to claim 7, wherein a step is performed one or a plurality of times for moving the cutting tool in the carving direction and forming a fin whose proximal end is linked to the work on an end of the planned location for forming the recess in the work, until the blade part reaches a prescribed depth, whereby the worked surface is formed slanting from the prescribed depth to a surface of the work.

10. The method of forming a recess in a work according to claim 9, wherein the step is performed one or a plurality of times for moving the cutting tool in the carving direction and forming the fin whose proximal end is linked to the work on an end of the planned location for forming the recess in the work, until the blade part reaches the prescribed depth, after which the cutting tool is made to face the opposite direction and is moved in the carving direction, and a plurality of the fins are cut and thereby separated, whereby the worked surface is formed.