KR200398216Y1 - Tool feed stop point recognition device for tool compensation work in CNC machine tools - Google Patents

Abstract

In the tool calibration operation of a CNC machine tool, the operator visually confirms that the tool is in contact with the object under test, and stops the tool transfer. When the sensor 22 detects that the tool and the object under test come into contact with each other by indirect means, the buzzer 21 generates a warning sound and the operator stops the tool movement.

[Index]

* Bite: An object bitten by a chuck or vise.

* Fixture: A piece to be fastened to the eye bolt (3.19) by fixing the sensor stand (6) to prevent movement in the X, Z axis direction.

* Eye bolt: A hole is formed in the center so that the holders (2, 18) can be fastened with bolts, etc. and attached to the main body (4).

* Body: An object for mounting the signal generator 21 and the sensor stage (6). If necessary, an amplifier and a power converter (rectifier) for amplifying the signal of the sensor 22 are installed.

* Sensor stand: A unit equipped with the sensor 22 at the tip as shown in FIG.

* Bracket hanger hole: Hole for inserting the "a" part of the bracket (2,18).

* Contact plate: The plate that the tool tip contacts.

 * Compression Spring: A spring that keeps the specimen axis (15) in position when not measuring.

* Sample Shaft Protection Tube: A tube made of a material that blocks the detection of the sensor 22 to prevent separation of the specimen shaft 15.

    Sample axis: The axis to which the specimens (23, 24) are attached and integrated with the contact plate (9.17).

    Specimen: made of a material that actuates the sensor 22.

    * Detection hole: The hole in which the sensor 22 detects the specimens 23 and 24.

Description

Tool feed stop point recognition device for tool compensation work in CNC machine tools

In the tool calibration process of CNC machine tools, the sensor detects the contact between the tool and the object under test and makes it easy for the operator to know the tool transfer stop point.

Tool shape compensation for various types of CNC machine tools is performed by the operator visually checking the contact between the tool and the object under test.

Reduces errors caused by visual checks and prevents safety accidents due to chip scattering.

ㅇ. Parts assembly and processing for each element

1. The bite 1 is in the form of a circular column, and one end is machined so that the main body 4 can be firmly integrated.

2. The main body 4 is grooved so that the sensor stand 6 can be rotated 90 degrees, and drills a hole into which the sensor stand rotating shaft 5 is inserted. Attach the eye bolts (3, 19) to the upper and side surfaces as shown in Figure 1, and fasten the end (2, 18) bent the end of the "b" shape. And the buzzer 21 is attached.

3. The sensor stand 6 drills a hole into which the sensor stand rotating shaft 5 is inserted so as to be fastened to the main body 4 at one end. On the other side, the groove is inserted into the sensor 22 in the center, and then the sensor 22 is inserted and fixed so as not to move. The contact 12 to be connected with the wire 20 is exposed, and the holder hanger holes 7 and 17 are drilled.

4. The specimen shaft protection tube (11) forms a spring release prevention jaw (10, 13) at both ends, and the detection hole (25) is drilled in the part connected integrally with the sensor stand (6).

5. The specimen shaft 14 attaches the specimens 23 and 24 symmetrically with respect to the bilateral point in the longitudinal direction and is inserted into the specimen shaft protection tube 11. When the compression springs 10 and 16 are inserted into both sides, and the contact plates 9 and 15 are attached to prevent the compression springs 10 and 16 from being separated, the compression springs 10 and 16 are integrated with the specimen shaft protection tube 11.

ㅇ. Recognition device complete assembly

When the sample shaft protective tube 11 assembled in No. 5 is integrated with the No. 3 sensor stand 6, the detection hole 25 made in No. 4 faces the sensor 22. The center line of the sensor stand 6 and the center line of the specimen shaft 14 are integrated so as to be orthogonal to each other, inserted into the groove formed in the main body 4, and the sensor stand rotating shaft 5 is inserted into the hole and assembled. And when the longitudinal center axis of the clamping body 1 and the center axis line of the sensor stand 6 is located in a straight line and firmly integrated, the recognition device of the present invention is completed.

ㅇ. How to use

end. Z axis correction method

-Put the clamping body (1) on the chuck (CHUCK), and rotate the sensor stand (6) by 90 degrees so that the holder (2) is inserted into the holder hook hole (7) so that it does not move in the Z-axis direction. The centerline of the specimen axis 14 and the centerline of the object 1 are parallel.

-Move the reference tool near the contact plate 15 and adjust the direction so that the tip of the reference tool contacts the center of the contact plate 15.

If the tip of the reference tool is brought into contact with the contact plate 15 and the reference tool continues to be transferred, the sample 24 attached to the specimen shaft 14 contacts the detection hole 25 and the sensor 22 is operated. Electricity flows, and a buzzer 21 is generated.

-The operator who stops the tool immediately stops moving the tool. Then, select the relative coordinates among the function buttons of the CNC operator, and input the W value as "0".

-Select tool compensation function and input "0" in Z axis compensation value of tool No.1 (normal reference tool number) of compensation screen.

-After moving the tool bar to the proper position, select the next measuring tool and transfer it in the same way as the reference tool.

-Enter the relative coordinates on the screen as Z-axis correction value into the measurement tool number.

-Then calibrate the tool to be used as above.

ㅇ. Tool for backside machining (line number 1, 4, 5)

-Select the tool for backside processing and contact the tool tip to the contact plate (9) while paying attention to the collision with the device.

      * The correction value is calculated by adding (+) the distance value "A, B" shown in Fig. 2 to the maximum width value of the detection hole 25 and adding it to the relative coordinate value displayed on the screen (+).

      That is, correction value = C + (A + B + L)

C: Relative coordinate value for tool stop

      A: the contact plate 9 at the end of the specimen 23, B: the distance of the contact plate 15 at the end of the specimen 24 (measured and provided by the manufacturer)

L: Maximum width of the detection hole 25 in the axial length direction (measured by the manufacturer)

I. X-axis correction method

      -Rotate the sensor stand (6) in the 3 o'clock direction, and fix the sensor stand (6) so that it does not move with the holder (18).

-Select the reference tool and measure it in the same way as the Z axis correction method.

-Tool for internal diameter machining should be done in the same way as tool compensation for Z axis backside machining.

* Correction value = C + (A + B + L)

C: Relative coordinate value of tool stop

      A: the contact plate 9 at the end of the specimen 23, B: the distance of the contact plate 15 at the end of the specimen 24 (measured and provided by the manufacturer)

L: Maximum width of the detection hole 25 in the axial length direction (measured by the manufacturer)

ㅇ. CNC milling

-Same as CNC lathe tool calibration method.

ㅇ. Tool correction is the key to observing exactly when the tool is in contact with the object to be measured. The cognitive device of the present invention is an indirect method. Can be reduced.

ㅇ. Since there is no need to check the contact visually, safety accidents are prevented.

ㅇ. Figure 1: Full perspective view.

ㅇ. 2 is a partial cross-sectional view showing the sensor 22 and the samples 23 and 24.

ㅇ. Drawing

            1: lump. 2,18: fixed base. 3, 19: eye bolt. 4: body. 5: Sensor shaft rotation axis. 6: Sensor stand. 7,17: stand hook hole. 8,16: Compression spring. 9,15: contact plate. 10,13: spring break prevention jaw. 11: Specimen Protection. 12: Sensor contact. 14: Sample axis. 20: Wire. 21: BUZZER. 22: sensor. 23, 24: specimen. 25: Detection hole.

Claims (2)

      According to the present invention, the specimen shaft 14 having the specimens 23 and 24 attached to both sides of the center part is inserted into the specimen shaft protection tube 11, and the compression springs 8 and 16 and the contact plate 9, 15 is attached so that the sensor stand 6 and the detection hole 25 incorporating the sensor 22 are integrated so as to face the sensor 22, and a buzzer 21 generating a warning sound when the sensor 22 is operated. A tool feed stop point recognition device in the tool calibration work of the CNC machine tool assembled with the main body (4) and the chuck (1). The tool transfer stop point recognition device according to claim 1, wherein the sensor stand (6) rotates 90 degrees about the sensor stand rotation axis (5).