Patent application number | Description | Published |
20100158626 | Drill and drilling method for workpiece - A drill includes a cutting edge. The cutting edge has a point angle which is continuously decreased from a center-position point angle A (herein, 0° | 06-24-2010 |
20100166517 | Drill - A drill includes a cutting edge having a ridgeline. The ridgeline has a part of an ellipse and a straight line. It is assumed that the coordinates of a separation point of an ellipse portion from a straight line portion are (x | 07-01-2010 |
20100232899 | Drill - A drill includes a pair of main cutting edges extending from a distal portion of the drill to a position close to a proximal end of the drill to entirely define a two-edge configuration, and a pair of auxiliary cutting edges extending between positions at the distal and proximal sides of a maximum diameter position to partly define a four-edge configuration. A ridgeline of each auxiliary cutting edge is located within an angle smaller than 90° from a ridgeline of the corresponding main cutting edge toward the rear in a rotation direction of the drill. The point angle of the auxiliary cutting edges increases at a higher rate than the point angle of the main cutting edges in a predetermined range from the maximum diameter position toward a distal end of the drill. | 09-16-2010 |
20110070042 | ROTARY CUTTER - The object of the invention is to stably spray cutting fluid in a good mist form, when cutting fluid and air are supplied from the surrounding area and cutting fluid is sprayed in a mist form from the tip end section of a rotary cutting tool. The rotary cutter of the present invention sequentially feeds a mixture of cutting fluid and air through a supply pipe | 03-24-2011 |
20110265610 | FASTENING TOOL - This fastening tool supports a key wrench such that it cannot rotate at a location where a hexagonal hole on the tip end part comes in contact with a nut, so that even though the key wrench is pressed backward as a pin is screwed into the nut, a key wrench holder remains in a state of contact with the nut. After the pin has been screwed into the nut, the nut is twisted off at a weak section. The further the pin is screwed into the nut, the key wrench holder supports the key wrench at a location closer to the pin, which keeps the amount of torsional deformation of the tip end part of the wrench small, and thus makes it possible to securely engage with the pin, and in the final state of the fastening work, it is possible to completely twist off the twist-off type nut, which requires a large torque. | 11-03-2011 |
20120141218 | HAND DRILL - The object of the invention is to provide a hand drill that capable of suppressing delamination that occurs when drilling holes in an object, as well as being more compact. The hand drill has a base member, a damper, a drill and drill blade. The base member has a contact surface that comes in contact with an object being drilled, and a drill bushing. The damper comprises a piston rod and a cylinder, and extends or contracts in its own axial direction. The tip end section of the piston rod is fastened to the base member. The drill is fastened to the cylinder and displaces together with the cylinder. The drill blade is installed in the drill so that it is parallel to the axial direction of the damper. When the damper is in the extended state, the tip end of the drill blade is located at the tip end of the drill bushing. | 06-07-2012 |
20120144643 | Sleeve Removal Tool and Sleeve Removal Method - The object of the invention is to provide a sleeve removal tool that is able to easily remove a sleeve from a tap without damaging the sleeve. The sleeve removal tool has a first fastening member and a second fastening member. The first fastening member has a first contact surface and inner screw section, and is formed in a cylindrical shape. The first contact surface comes in contact with the flange of the sleeve all around one ring shaped surface. An inner screw section is provided such that it protrudes in the axial direction from the first contact surface. The second fastening member has a second contact surface and outer screw section, and is formed in a cylindrical shape. The first contact surface comes in contact all around the other ring shaped surface of the flange. | 06-14-2012 |
20120251253 | CUTTING TOOL - Disclosed is a cutting tool, including: a cutting edge including a coating from a rake face to a flank face, and has a relief angle of not less than 15 degrees, a material of the coating having a higher wear resistance than a base material of the cutting edge, and during cutting of a work, an edge of the coating on the rake face at a top of the cutting edge is worn by friction with the work; with a progress of a wear inward in a radial direction, an edge of the coating on the flank face at the top of the cutting edge is removed by friction with the work to expose the base material thereunder; and the exposed base material is worn by friction with the work to retract the flank face inward in the radial direction. | 10-04-2012 |
20120321403 | DRILL BIT - Provided is a step-shaped drill bit including at least two stepped cutting edges that are axially provided. A cutting edge of a first step from a tip is formed so as to satisfy at least one of the following conditions. That is, a number of blades is smaller, a point angle of the cutting edge is larger, or a clearance angle of the cutting edge is larger than that of cutting edges of a second and subsequent step(s). As a result, a thrust resistance during a perforation can be reduced compared with a case in which the first step cutting edge is formed such that the number of blades, the point angle of the cutting edge and the clearance angle of the cutting edge are the same as those of the second and subsequent step(s). | 12-20-2012 |
20130223942 | Milling Insert and Milling Tip-Replacement-Type Rotary Cutting Tool - Disclosed is a milling insert, in which cutting resistance is reduced, wear advance of cutting edges is suppressed, and elongation of a lifetime is achieved, and is an indexable face milling cutter. | 08-29-2013 |
20140003875 | DRILL DRIVING APPARATUS AND DRILL DRIVING METHOD | 01-02-2014 |
20140054053 | TOOL DRIVING DEVICE, TOOL DRIVING METHOD, AND TOOL FEEDING MECHANISM FOR TOOL DRIVING DEVICE - A tool feeding mechanism for a tool driving device includes a cylinder mechanism, a positioning mechanism, and a holding mechanism. The cylinder mechanism moves a tool rotation driving device to hold and rotate a tool, in a tool axis direction on an exterior of a cylinder tube using power of a piston. The positioning mechanism is connected to the cylinder tube side of the cylinder mechanism either directly or indirectly in order to position the cylinder mechanism relative to a workpiece. The holding mechanism holds the tool rotation driving device such that the power of the piston in the cylinder mechanism is transmitted to the tool rotation driving device. | 02-27-2014 |
20140069677 | AIR CONTROL DEVICE AND AIR CONTROL METHOD - An air control device includes an air suction port, air discharge ports, and an air control system. The air suction port takes in air. The air discharge ports discharge the taken-in air. The air control system discharges the air through the air discharge ports alternately for respective preset times. An air control method includes: taking in air; and discharging the air alternately through air discharge ports for respective preset times. | 03-13-2014 |
20150044946 | BLAST PROCESSING DEVICE AND BLAST PROCESSING METHOD - A blast processing device includes a first nozzle, a second nozzle, and a moving mechanism. The first nozzle blasts a blasting material toward a workpiece, using first compressed air. The second nozzle blasts second compressed air for adjusting a diffusion range of the blasting material. The moving mechanism moves the first nozzle and the second nozzle over the workpiece. | 02-12-2015 |