KR101782377B1 - Cutting tools correctly installed equipment and installation normal method of using the same - Google Patents

Abstract

Disclosed are a device to correctly install a cutting tool of a cutting unit and a correct installation method of the cutting tool using the same. According to the present invention, the device to correctly install the cutting tool of the cutting unit comprises: a first distance measuring means to measure an A constant value which is a distance from a front end thereof to a reference body; a second distance measuring means to measure a B constant value which is a distance from the front end of the first distance measuring means to a terminal end of a tool holder; a third distance measuring means to measure a C parameter value which is a distance from the terminal end of the tool holder to a front end of the cutting tool; and a control portion to determine whether or not the cutting tool is correctly installed in accordance with whether or not a result value of summation of the B constant value measured in the second distance measuring means and the C parameter value measured by the third distance measuring means is equal to the A constant value while being connected to the first, second, and third measuring means.

Description

Technical Field [0001] The present invention relates to a cutting tool normal setting apparatus and a cutting tool using the cutting tool,

The present invention relates to a cutting tool normal setting apparatus for a cutting unit and a normal setting method of the cutting tool using the same.

More specifically, it is possible to precisely derive a mounting position of a cutting tool of a cutting unit (for example, a micro-cutting device), and to accurately position the cutting tool according to the result of the derivation, And a normal installation method of the cutting tool using the same.

Ultra precision machining technology is very important in the field of semiconductor and optical communication as well as in the aerospace industry, and it is expanding into the global industry in conjunction with the generalization of energy saving technology and the production of ultra small parts. In line with this trend, along with the development of energy-technology and nano-technology, demand for reproduction of hydrophilic and hydrophobic surfaces based on natural simulation technology and processing of micro-optical products is also increasing have. In order to process a product having a hydrophilic or hydrophobic surface or a micro-optical product, it is required to maintain a pattern shape of several tens to several microns and to have a precision of nm-scale.

Recently, a so-called micro-machining system for ultra-precision machining has been actively developed, and a so-called Fast Tool Servo (FTS) capable of surface machining at a high machining speed is continuously being developed.

The micro-cutting device is a device for processing a material by micro-vibrating a cutting tool using a piezo actuator capable of precise feeding while having a fast frequency response characteristic. It is capable of correcting a motion error in real time during machining, It is applied to production.

Accurate measurement of the position of the initial tool in the case of a cutting apparatus seeking high precision as in the case of such a micro-cutting apparatus is the first work for improving the machining accuracy.

Since the shaft and the air cylinder for restoring the plate having the LVDT sensor attached with the conventional LVDT sensor (Linear Variable Differential Transformer Sensor) are confined to each other, depending on the degree of force applied from the air cylinder, There is a change in the stop position of the plate so that an error more than necessary is finally included in the position measurement of the tool.

In the case of super precision machining such as diamond turning, the tool and workpiece are machined at right angles due to the structural characteristics of the machining apparatus in which the X axis and the Z axis are separated. In this case, if the center of the tool and the workpiece do not coincide with each other, The unprocessed portion remains in the center portion.

Such a phenomenon is a serious problem that causes a defective machining of a workpiece when machining a plane and an aspherical surface. However, since the tool must be used differently depending on the shape and material of the workpiece and the machining conditions, tool replacement is frequent, Since the position must be re-measured, a measuring method which is convenient and simple and has high repeatability is required.

Patent Document 1: JP-A-10-2007-0068734 Patent Document 2: Registration No. 10-0950535 Patent Document 3: Published Patent Application No. 10-2010-0034177

It is an object of the present invention to provide a cutting tool normal installation device of a cutting unit capable of precisely deriving a mounting position of a cutting tool of a cutting unit (for example, a micro-cutting device) and accurately correcting the position of the cutting tool, .

Another object of the present invention is to provide a method for normally installing a cutting tool using the cutting tool normal setting apparatus of the above-mentioned cutting unit.

The above object of the present invention can be achieved by a first distance measuring means for measuring an A constant value that is a distance from a tip of the probe to a reference body; Second distance measuring means for measuring a B constant value which is a distance from a tip of the first distance measuring means to an end of the tool holder; A third distance measuring means for measuring a C variable value which is a distance from an end of the tool holder to a tip of the cutting tool; And a resultant value obtained by combining the B constant value measured by the second distance measuring means and the C variable measured by the third distance measuring means while being connected to the first, second and third distance measuring means, And a control unit for determining whether or not the cutting tool is normally installed according to whether the cutting tool is the same or not.

Preferably, the first distance measuring unit may be any one of an infrared sensor, an ultrasonic sensor, a laser sensor, and a vision camera.

Preferably, the second distance measuring unit may be an infrared sensor, an ultrasonic sensor, a laser sensor, or a vision camera.

Preferably, the third distance measuring means may be a vision camera.

Preferably, the control unit includes: an operation unit for summing up the B constant value and the C variable value; And a comparison unit comparing the result value calculated by the operation unit with an A constant value and determining whether the result value is equal to or different from the A value.

The display unit may further include a display unit for outputting a determination result of the comparison unit.

It is still another object of the present invention to provide a cutting tool normal installation method of a cutting unit using a cutting tool normal setting apparatus of a cutting unit, wherein a distance from a tip of the first distance measurement means to a reference body is defined as an A constant value, A distance from the tip of the distance measuring means to the end of the tool holder is represented by B constant value, and a distance from the end of the tool holder to the tip of the cutting tool is C variable value, the result of the B constant value + C variable value is A And determining whether the cutting tool is normally installed according to whether or not the constant value is equal to or different from the constant value.

It is also an object of the present invention to provide a distance measurement device for measuring a D constant value, which is a distance from a tip of a probe to a reference object; Tilt measuring means for measuring a tilt value applied to the reference body when the tip of the cutting tool contacts the reference body; And a tilt measuring unit that receives the tilt value measured by the tilt measuring unit while being connected to the distance measuring unit and the tilt measuring unit and determines whether the value is 0 or not. If the value is 0, the D constant value and the tip of the distance measuring unit The value of the E variable, which is the distance from the tip of the distance measuring means to the tip of the cutting tool, is determined to be equal to the E variable value, And a controller for determining that the cutting tool is abnormally installed because the tool is different from the first tool.

Preferably, when the tilt value of the tilt measuring means is not 0, the position of the cutting tool is corrected to the point where the tilt value of the tilt measuring means becomes zero, so that the cutting tool can be installed normally.

The display unit may further include a display unit connected to the controller to output the tilt value.

It is another object of the present invention to provide a cutting tool normal installation method of a cutting apparatus using a cutting tool normal installation device of a cutting apparatus, which is capable of measuring a tilt value sensed by the tilt measurement means while the cutting tool is in contact with the reference body A distance between the distal end of the distance measuring means and the reference tool, and a distance D from the distal end of the distance measuring tool to the distal end of the cutting tool by positioning the cutting tool at a point where the measured inclination value becomes zero. So that the values of the variables are equal to each other, so that the cutting tool can be normally installed.

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According to the present invention, the installation position of the cutting tool of the cutting unit can be precisely derived in advance, and the positional correction of the cutting tool can be precisely performed according to the result of the derivation. Thus, So that the cutting precision can be increased.

1 is a schematic diagram of a cutting unit according to a first embodiment of the present invention
FIG. 2 is a schematic view of a cutting tool normal setting device of a cutting unit according to a first embodiment of the present invention
3 is a schematic view of a cutting unit according to a second embodiment of the present invention
4 is a schematic view of a cutting tool normal setting apparatus for a cutting unit according to a second embodiment of the present invention
FIGS. 5 and 6 are schematic views of a cutting unit and a cutting tool normal setting apparatus according to a third embodiment of the present invention

The terms used in the present invention are defined in consideration of the functions of the present invention and may vary depending on the intention or custom of the user or the operator. Therefore, the definitions of these terms are meant to be in accordance with the technical aspects of the present invention As well as the other.

In addition, optional terms in the following embodiments are used to distinguish one element from another element, and the element is not limited by the terms. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts which may unnecessarily obscure the gist of the present invention will be omitted.

Hereinafter, specific examples of the present invention will be described.

The installation position of the cutting tool may differ depending on the configuration of the cutting unit or the installation structure of the cutting tool. The following embodiment is an embodiment reflecting such a case.

[First Embodiment]: See FIGS. 1 and 2

The cutting tool normal setting device of the cutting unit of the first embodiment is, for example, for precisely setting the position of the cutting tool of the FTS (Fast Tool Servo) before the machining operation. Here, the cutting unit 10 includes a structure in which the cutting tool 30 is inserted into the tool holding groove 21 of the tool holder 20.

The cutting tool normal setting apparatus 100 of the first embodiment includes the first distance measuring means 110, the second distance measuring means 120, the third distance measuring means 130 and the control unit 140 .

That serve to the first distance measuring means 110 measures the A constant value (d ₁₎ of the distance to the basic body (1) from its front end, the A constant value (d ₁₎ is the first Can be measured by the sensing function of the distance measuring means 110, and thus is a known value.

Here, the first distance measuring unit 110 may be any one of an infrared sensor, an ultrasonic sensor, a laser sensor, and a vision camera.

The second distance measuring means 120 measures the B constant value d _{2 which} is the distance from the tip of the first distance measuring means 110 to the end of the tool holder 20, The B constant value (d ₂ ) is a value that can be measured by a separate measurement means or by making a certain fixed value when manufacturing the cutting unit.

Here, the second distance measuring unit 120 may be any one of an infrared sensor, an ultrasonic sensor, a laser sensor, and a vision camera.

The third distance measuring means 130 measures the C variable value d _{3 which} is the distance from the distal end of the tool holder 20 to the distal end of the cutting tool 30, ₃ corresponds to the variable value since the length value may vary depending on how much the cutting tool 30 is fitted in the tool holding groove 21.

Here, the third distance measuring means 130 may be a vision camera.

The control unit 140 determines the B constant value d ₂ measured by the second distance measuring unit 120 and the B constant value d ₂ measured by the third distance measuring unit 120 while being connected to the first, second, and third distance measuring units 110, 120, And determines whether the cutting tool 30 is normally installed according to whether the resultant value obtained by adding the C variable value d ₃ measured by the cutting tool 130 is equal to or different from the A constant value d ₁ .

The control unit 140 includes a calculation unit 141 for calculating a sum of the B constant value d ₂ and the C variable value d ₃ and a calculation unit 141 for calculating the A constant value d ₁ ), and a comparison unit 142 for determining whether the result value is equal to or different from the A constant value (d ₁ ).

In addition, the cutting tool normal setting apparatus 100 of the cutting unit of the first embodiment may further include a display unit 150 that outputs a determination result of the comparison unit 142. [ Accordingly, the user can finally check the installation state of the cutting tool 30 based on the resultant value output to the display unit 150. [

Hereinafter, a normal cutting tool installation method of the cutting unit using the cutting tool normal setting device of the cutting unit according to the first embodiment will be described.

A distance from the tip of the first distance measuring means 110 to the reference body 1 is defined as an A constant value d ₁ and a distance from the tip of the first distance measuring means 110 to the end of the tool holder 20 when the called B constant value (d _2), the cutting tool 30, the distance to the tip end C variable value (d ₃₎ from the end of the tool holder 20,

B constant value + C variable value = A constant value, the tip of the cutting tool 30 is in contact with the reference surface 1 a with respect to the reference body 1, so that good cutting is performed,

B constant value + C variable value > A constant value, the tip of the cutting tool 30 goes over the reference surface 1a of the reference body 1,

When the B constant value + the C variable value < A constant value, the tip of the cutting tool 30 does not reach the reference surface 1a of the reference body 1, .

Therefore, the position of the cutting tool 30 is corrected so that the relation of the B constant value + C variable value = A constant value can be satisfied, thereby preventing the problem of overcutting and unprocessed in advance.

[Second Embodiment] See FIGS. 3 and 4

The cutting tool normal setting device of the cutting unit of the second embodiment is the same as the first embodiment for precisely setting the position of the cutting tool of the FTS (Fast Tool Servo: FTS) before the machining operation. Here, the cutting unit 10 includes a state in which the cutting tool 30 is seated in the tool holder 20.

From this, the cutting tool normal setting apparatus 200 of the second embodiment can include the distance measuring means 210, the tilt measuring means 220 and the control portion 230.

The distance measuring unit 210 that serves to measure the D constant value (d _4), the distance to the reference body (1) from its front end, in which D a constant value (d ₄₎ is a distance measuring unit (210 ), It is a value that can be known.

The tilt measuring means 220 serves to measure a tilt value applied to the reference body 1 when the tip of the cutting tool 30 contacts the reference body 1. [

The tilt measuring means 220 includes a first load sensor 221 installed at one end of the reference body 1 to measure a load applied to one end of the reference body 1, And a second load sensor 222 installed at the other end of the reference body 1 and measuring the load applied to the other end of the reference body 1. [ Therefore, when a load concentrated on one of the load sensors 221 and 222 is generated when the cutting tool 30 contacts the reference body 1 The slope value of the reference body is not 0), and the cutting tool 30 is excessively in contact with the reference body 1. On the other hand, when the load values of the two load sensors are equal (the slope value of the reference body is 0) The cutting tool 30 is brought into a state of being in contact with the reference body 1 accurately.

The controller 230 receives the tilt value measured by the tilt measuring means while being connected to the distance measuring means 210 and the tilt measuring means 220 and judges whether the value is 0 or not As a result of the determination, if the value is 0, the D constant value d ₄ is equal to the E variable value d ₅ , which is the distance from the tip of the distance measuring means 210 to the tip of the cutting tool 30, If the final judgment, and conversely non-zero to 30 is installed properly, the distance of E variable value (d ₅₎ to the cutting tool tip from the front end of the D constant value (d ₄₎ and a distance measuring unit (210) It is determined that the cutting tool 30 is abnormally installed.

If the tilt value of the tilt measuring means 220 is not 0, the cutting tool 30 is moved to a position where the tilt value of the tilt measuring means 220 becomes zero, It can be calibrated to be a normal installation.

In addition, the cutting tool normal setting apparatus 200 of the cutting unit of the second embodiment may further include a display unit 240 that outputs the tilt value while being connected to the control unit 230. Accordingly, the user can finally confirm the installation state of the cutting tool 30 based on the tilt value output to the display unit 240, and the position of the cutting tool 30 can be corrected based on the tilt value.

Hereinafter, a normal cutting tool installation method of the cutting unit using the cutting tool normal installation device of the cutting unit according to the second embodiment will be described.

First and second load sensors 221 and 222, which are inclination measuring means 220, are installed at the upper and lower ends of the reference body 1, respectively.

Next, the cutting tool 30 is brought into contact with the reference body 1.

Next, it is determined whether the load values sensed by the first and second load sensors 221 and 222 are the same or different in a state where the cutting tool 30 is in contact with the above. If the identified values are not the same, move the cutting tool 30 to the point where the two sensor values are equal.

Therefore, the D constant value d ₄ , which is the distance from the tip of the distance measuring means 210 to the reference body 1, and the E constant, which is the distance from the tip of the distance measuring means 210 to the tip of the cutting tool 30, The distance d ₅ is set to be the same distance so that the cutting tool 30 can be set in the normal position.

[Third embodiment]: See FIGS. 4 and 5

In the cutting tool normal setting apparatus 300 of the cutting unit of the third embodiment, for precisely setting the position of the cutting tool of the FTS (Fast Tool Servo: FTS) in advance, for example, in the first and second embodiments same. Here, the cutting unit 10 includes a tool holder body 21, a variable tool holder 22 installed on the tool holder body 21 so as to be movable forward and backward by a piezo actuator 40, And a cutting tool 30 which is seated on the workpiece 22.

Accordingly, the cutting tool normal setting apparatus 300 of the cutting unit according to the third embodiment may include the advance / retreat sensing means 310 and the control unit 320.

The advance / retreat sensing means 310 senses the forward / backward displacement amount? D ₂ of the variable tool holder 22 caused by the piezoelectric actuator 40 while being installed on the tool holder body 21, 320 serves to derive forward and backward displacement (Δd ₁₎ of the cutting tool (30) to receive the back and forth displacement (Δd ₂₎ is detected by said advance and retreat detecting means (310).

Hereinafter, a normal cutting tool installation method of the cutting unit using the cutting tool normal setting apparatus of the cutting unit according to the third embodiment will be described.

The advancement / retraction detecting means 310 detects the amount of displacement of the variable tool holder 22 by using the fact that the displacement amount? D ₁ of the cutting tool 30 by the piezoelectric actuator 40 is equal to the displacement amount? D ₂ of the variable tool holder 22, The displacement amount of the cutting tool 30 can be derived by measuring the amount of forward and backward displacement between the advancement and retraction sensing means 310 and the variable tool holder 22 in a fixed state.

Therefore, the amount of the fine displacement can be applied as a reference value in actual fine cutting.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is evident that it can be modified or improved.

It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

10: cutting unit 20: tool holder
21: tool holding groove 30: cutting tool
100: The cutting tool normal installation device of the first embodiment
110: first distance measuring means 120: second distance measuring means
130: third distance measuring means 140:
150:
200: Cutting tool normal installation device of the second embodiment
210: distance measuring means 220: tilt measuring means
230: Control section 240:
300: cutting tool normal installation device of the third embodiment
310: forward / backward detection means 320:
330:

Claims (14)

A first distance measurement means for measuring an A constant value, which is a distance from the tip of the probe to the reference body;
Second distance measuring means for measuring a B constant value which is a distance from a tip of the first distance measuring means to an end of the tool holder;
A third distance measuring means for measuring a C variable value which is a distance from an end of the tool holder to a tip of the cutting tool; And
The result obtained by combining the B constant value measured by the second distance measuring means and the C variable measured by the third distance measuring means with the first, second and third distance measuring means is equal to the A constant value A controller for determining whether the cutting tool is normally installed according to whether the cutting tool is installed in a predetermined position or not;
Wherein the cutting tool is mounted on the cutting tool.
The method according to claim 1,
Wherein the first distance measuring means is any one of an infrared sensor, an ultrasonic sensor, a laser sensor, and a vision camera.
The method according to claim 1,
Wherein the second distance measuring means is any one of an infrared sensor, an ultrasonic sensor, a laser sensor, and a vision camera.
The method according to claim 1,
And the third distance measuring means is a vision camera.
The method according to claim 1,
The control unit
An operation unit for summing up the B constant value and the C variable value; And
And a comparison unit comparing the result calculated by the operation unit with an A constant value and determining whether the result is equal to or different from an A constant value.
The method of claim 5,
And a display unit for outputting a determination result of the comparison unit.
A cutting tool normal installation method of a cutting unit using a cutting tool normal installation apparatus of a cutting unit according to any one of claims 1 to 6,
A distance from the tip of the first distance measuring means to the reference body is defined as an A constant value, a distance from the tip of the first distance measuring means to the end of the tool holder is defined as a B constant value, When the distance is called the C variable value,
And determining whether the cutting tool is normally installed according to whether the result of the B constant value + C variable value is equal to or different from the A constant value.
A distance measuring means for measuring a D constant value which is a distance from the tip of the probe to the reference body;
Tilt measuring means for measuring a tilt value applied to the reference body when the tip of the cutting tool contacts the reference body; And
The distance measuring means and the tilt measuring means are connected to each other and the inclination measured by the tilt measuring means is received, and it is determined whether the value is 0 or not. If the value is 0, the D constant value and the distance from the tip of the distance measuring means It is determined that the cutting tool is normally installed because the distance from the tip of the distance measuring means to the tip of the cutting tool is equal to the distance from the D constant value to the tip of the cutting tool. And the controller determines that the cutting tool is abnormally installed because it is different.
The method of claim 8,
Wherein when the tilt value of the tilt measuring means is not 0, the position of the cutting tool is corrected to the point where the tilt value of the tilt measuring means becomes zero, so that the cutting tool is installed normally.
The method of claim 8,
And a display unit connected to the control unit and outputting the tilt value.
A cutting tool normal installation method of a cutting apparatus using a cutting tool normal installation apparatus of a cutting apparatus according to claim 8 or 9,
Measuring a tilt value sensed by the tilt measuring means while the cutting tool is in contact with the reference body and positioning the cutting tool at a position where the measured tilt value becomes 0, Wherein a distance between the D constant value and a distance from the tip of the distance measuring means to the tip of the cutting tool is equal to the distance between the D constant value and the reference tool.
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