JP3014248U - Distance measurement tool - Google Patents

Abstract

(57) [Summary] [Purpose] A jig that can reliably and easily measure the distance between the tool tip and the surface of a work piece in a numerically controlled machine tool without damaging the tool or the work piece. I will provide a. [Arrangement] A tool for measuring a gap between a tool tip and a surface of a workpiece in a numerically controlled machine tool. In this tool, an insulator is provided on a conductive plate, and at least a part of the conductor that can move up and down in or on the insulator is exposed on the insulator. And a detection circuit provided between the conductor and the conductive plate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a jig used for reliably and easily measuring a gap between a tool tip and a surface of a workpiece in a numerically controlled machine tool.

[0002]

[Prior art]

 In order to perform machining using a numerically controlled machine tool such as an NC lathe, NC milling machine, or machining center, the work origin must be found before the machining work. For that purpose, the surface of the workpiece placed on the table of the machine tool. It is necessary to measure the distance between the tool and the tool tip. In this case, conventionally, the tool was slowly lowered from the non-operating steady state to bring the tool tip into contact with the work piece, and the distance from the tool tip in the non-working steady state to the surface of the work piece was calculated from the numerical value on the display panel. I was asking.

[0003]

[Problems to be solved by the device]

 However, it is difficult to confirm whether or not the tip of the tool has come into contact with the work piece by the conventional method of obtaining the distance from the tip of the tool to the surface of the work piece. In many cases, the tool itself and the work piece were damaged.

The present invention is a jig capable of reliably and easily measuring a gap between a tool tip and a surface of a workpiece in a numerically controlled machine tool without damaging the tool or the workpiece. The purpose is to provide.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides an insulator on a conductive plate, and at least a part of the conductor that can move up and down in or on the insulator is interposed on the insulator. Between the tool tip and the surface of the workpiece in the numerically controlled machine tool, characterized in that a detection circuit is provided between the conductor and the conductive plate. It is an interval measuring tool.

Further, the present invention is the gap measuring tool, wherein the detection circuit is a detection circuit further provided on the conductive plate side thereof with a terminal for connecting to a table surface of the numerically controlled machine tool. .

In the present invention, the numerically controlled machine tool is an NC lathe, an NC milling machine, an NC boring machine, an NC boring machine, an NC grinding machine, a machining center, etc., and the present invention is most preferably used for a machining center. It is valid.

[0008]

[Action]

 Since the circuit for detecting the contact between the tool tip and the conductor is provided between the conductor and the conductor plate in the distance measuring tool of the present invention, the tool is lowered to bring the tool tip into contact with the conductor. Then, the detection circuit is activated immediately. When the pressing of the tool is stopped by detecting the contact of the tool tip with the conductor, the moving distance of the tool is displayed on the display. From this movement distance and the height of the distance measuring tool of the present invention, the distance between the tool tip (in the non-actuated state) and the surface of the workpiece can be determined. Since a buffer is provided between the insulator and the conductor, damage to the tool tip and the conductor is prevented.

When the pressing of the tool is released, the tip of the tool is separated from the conductor and the operation of the detection circuit is also released.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial sectional view including a circuit diagram of a distance measuring tool according to an embodiment of the present invention. FIG. 2 is a partially cutaway side view showing a usage state of the distance measuring tool according to the embodiment of the present invention.

The distance measuring tool of the present invention shown in FIG. 1 basically comprises a metal conductive plate 1, a resin insulator 2, a metal conductor 3, a spring 4 and a detection circuit 5.

The resin insulator 2 is a desk with legs and is provided on the metal conductive plate 1. A through hole is vertically provided in the center of the desk surface of the desk-shaped resin insulator 2 with legs, and a bearing 6 is formed on the inner circumference of the through hole.

The metal conductor 3 is nail-shaped, and the rod-shaped portion 8 is vertically inserted into the bearing 6 of the resin insulator 2. A stopper 7 is provided below the metal conductor 3 so that the metal conductor 3 is not separated from the bearing 6. Numerical control work is performed on the (upper) outer periphery of the rod-shaped portion 8 of the metal conductor 3 exposed on the resin insulator 2 (that is, between the crown 9 of the metal conductor 3 and the resin insulator 2). A spring 4 is inserted as a buffer so that the impact of the tool of the machine is mitigated when the tool descends and comes into contact with the tool. Besides, the buffer may be rubber, sponge or the like. Tools are processing tool blades such as drills, end mills, and reamers.

Between the tip of the rod-shaped portion 8 of the metal conductor 3 and the metal conductor plate 1, when the tool tip 10 contacts the crown 9 of the metal conductor 3, the tool passes through the main body of the numerically controlled machine tool. A detection circuit 5 is provided which energizes from the tool tip 10 to the table 11 to emit light and / or sound. A power source such as a battery 12, a lamp 13 and a buzzer 14 are connected to the detection circuit 5. A terminal for connecting to the table 11 of the numerically controlled machine tool is provided on the conductive plate 1 side of the detection circuit 5 in case the work piece 15 is not conductive. The travel distance of the tool tip is displayed on the display of the numerically controlled machine tool.

[0015]

[Effect of device]

 As explained above, for the first time in the present invention, between the tool tip and the surface of the work piece in a numerically controlled machine tool such as an NC lathe or machining center without damaging the tool or the work piece. It became possible to measure the distance.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view including a circuit diagram of a distance measuring tool according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view showing a usage state of a distance measuring tool according to an embodiment of the present invention.

[Explanation of symbols]

 1 conductive plate 2 insulator 3 conductor

Claims (3)

[Scope of utility model registration request] 1. An insulator is provided on a conductive plate, and a conductor movable up and down in or on the insulator is provided so that at least a part of the conductor is exposed on the insulator. A tool for measuring a gap between a tool tip and a surface of a workpiece in a numerically controlled machine tool, wherein a detection circuit is provided between the conductor and the conductive plate. 2. The distance measuring tool according to claim 1, wherein the detection circuit further includes a terminal on the conductive plate side thereof for connecting to a table surface of the numerically controlled machine tool. 3. The distance measuring tool according to claim 1, wherein the numerically controlled machine tool is a machining center.