KR20230139198A - Measuring method for machining origin of processing artificial tooth - Google Patents

Abstract

The method for measuring the processing origin of a 5-axis tooth processing machine according to the present invention is to measure the reference origin for the steps; And it may include measuring the processing origin with respect to the reference origin.
The method of measuring the processing origin of a 5-axis tooth processing machine according to the present invention can measure the processing origin by electrical contact through a measuring probe provided in the movable tool part and an energized wet die, so that the actual position of the processing tool or wet die is specified. By minimizing positioning errors, processing precision can be improved and product yield can be excellent.

Description

Processing origin measurement method for 5-axis tooth processing machine {MEASURING METHOD FOR MACHINING ORIGIN OF PROCESSING ARTIFICIAL TOOTH}

The present invention relates to a method of measuring the processing origin of a 5-axis tooth processing machine, and more specifically, to a method of measuring the processing origin of a 5-axis tooth processing machine that can easily measure the processing origin of a workpiece of a tooth processing machine using an electrical contact method. .

Among medical devices, dental medical devices are medical devices used for dental treatment and treatment, which is a field of medicine that prevents, diagnoses, and treats diseases or abnormal conditions in the maxillofacial area, including teeth, surrounding tissues, and oral cavity. Among the medical device fields, the dental materials field occupies such a large proportion that it is designated separately.

Dental CAD/CAM refers to 3D scanning of devices (e.g., prosthetics, restorations, orthodontics, stents, etc.) needed in the dental treatment process on a computer, designing dental prosthesis directly on the computer (CAD), and processing them into a processor. It can be manufactured through precise cutting (CAM).

Dental processing machines, especially tooth processing machines, are being developed in various types, such as turning, machining centers, and CNC lathes. The most important thing in dental processing machines is the mechanical properties such as the strength of artificial teeth, but also minimizing processing errors. Processing precision must be secured to reduce heterogeneity. In particular, before starting the first work, you must set the zero points for the X, Y, and Z axes.

However, during the tooth processing process, there is a high possibility that the actual position of the processing tool or wet die may differ from the designated position due to assembly tolerances, origin deviation due to vibration or impact, sensor error, and mechanical error of the gear, etc., resulting in lower processing precision. There is a problem that the product yield decreases.

The present invention was proposed to solve the above problems, and the machining origin can be measured by electrical contact through a measuring probe provided in the movable tool part and a wet die that can be energized, so that the actual position of the machining tool or wet die is specified. We provide a method of measuring the processing origin of a 5-axis tooth processing machine that can improve processing precision and improve product yield by minimizing position errors.

The method of measuring the processing origin of a 5-axis tooth processing machine according to the present invention to achieve the above purpose is to contact an energized wet die with an energized measuring probe coupled to the drive spindle to measure the X-axis, Y-axis, Z-axis, and α. , measuring the reference origin for β; And it may include measuring the processing origin with respect to the reference origin.

The step of measuring the reference origin includes: moving the measuring probe up/down in the Z-axis direction and setting the initial zero point of the X-axis when it contacts the workpiece of the wet die; And it may include the step of moving the measuring probe up/down in the Z-axis direction at least several times and capturing the remaining zero points of the Z-axis, α, and β when it contacts the workpiece of the wet die.

In the step of measuring the machining origin, the initial zero point and the remaining zero point may be modified by data sheet values including the width-to-height ratio and material of the tooth workpiece.

The method of measuring the processing origin of a 5-axis tooth processing machine according to the present invention can measure the processing origin by electrical contact through a measuring probe provided in the movable tool part and an energized wet die, so that the actual position of the processing tool or wet die is specified. By minimizing positioning errors, processing precision can be improved and product yield can be excellent.

Figure 1 is a flowchart of a method for measuring the processing origin of a 5-axis tooth processing machine according to an embodiment of the present invention.
Figure 2 is an enlarged view of the workbed portion of a 5-axis tooth processing machine according to an embodiment of the present invention.
Figure 3 is a diagram of a spindle monitoring unit coupled to the processing tool unit and linear motor unit of a 5-axis tooth processing machine according to an embodiment of the present invention.
Figure 4 is a flow chart for measuring the reference origin in the processing origin measurement method of the 5-axis tooth processing machine according to an embodiment of the present invention.
Figure 5 is a photograph of the workbed portion of a 5-axis tooth processing machine according to an embodiment of the present invention.
Figure 6 is a diagram schematically showing a method of measuring the processing origin of a 5-axis tooth processing machine according to an embodiment of the present invention.

Hereinafter, an embodiment of a method for measuring the processing origin of a 5-axis tooth processing machine according to the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a flowchart of a method for measuring the processing origin of a 5-axis tooth processing machine according to an embodiment of the present invention, Figure 2 is an enlarged view of the workbed portion of a 5-axis tooth processing machine according to an embodiment of the present invention, and Figure 3 is It is a diagram of the spindle monitoring unit combined with the processing tool unit and linear motor unit of the 5-axis tooth processing machine according to an embodiment of the present invention, and Figure 4 is a method of measuring the processing origin of the 5-axis tooth processing machine according to an embodiment of the present invention. is a flow chart for measuring the reference origin, Figure 5 is a photograph of the workbed portion of the 5-axis tooth processing machine according to an embodiment of the present invention, and Figure 6 is the processing origin of the 5-axis tooth processing machine according to an embodiment of the present invention. This is a diagram schematically showing the measurement method.

The configuration of the 5-axis tooth processing machine according to the present invention will be briefly described.

As shown in Figures 2 and 3, the 5-axis tooth processing machine according to the present invention is fixedly installed with a tooth base material selected from titanium or zirconia, and has a wet die 120 for processing the titanium material and a zirconia material. a workbed portion 100 in which dry dies 110 are mutually partitioned; A driving spindle 220 to which the processing tool 210 is coupled is provided at one end and may include a processing tool unit 200 that processes the tooth base material while approaching or spaced apart from the tooth base material.

As shown in FIGS. 2 and 3, the workbed unit 100 may be divided into a wet die 120 on the left and a dry die 110 on the right. A central partition 130 is disposed between the wet die 120 and the dry die 110, and a through hole (not shown) that allows the processing tool unit 200 to be transferred without interference may be provided in the central partition 130. .

The wet die 120 is provided with a wet jig 121, a driving unit 150, and a pickup station 122, and the wet die 120 is accompanied with cutting oil so that titanium materials that need to be cut can be processed. Here, the titanium material can be processed into the tooth base material of the abutment that is coupled to the lower part of the artificial tooth.

In addition, a dry die 110 is provided on the right side of FIG. 2, and the dry die 110 includes a first dry jig 111 that can be rotated about the β axis (with the y axis as the rotation axis), a drive unit 151, and A second dry jig 112 and a drive unit 152 that can be rotated along the vertically arranged α-axis (with the x-axis as the center of rotation) may be provided. The first dry jig 111 and the second dry jig 112 can interact to produce artificial teeth, and a separate fixing assembly (not shown) that fixes the tooth base material is coupled to the first dry jig 111. It can be. Mainly, zirconia, a material for artificial teeth, can be processed in the dry die 110.

A dust collection unit 140 is provided at the bottom of the dry die 110, so that dust and chips can be sucked in from the bottom.

Here, the dry die 110 may be made of an electric current-conducting material. For example, the measuring probe 10 sends (-) current, and when (+) electricity flows to the dry die 110, the red LED provided in the measuring device lights up as soon as the tip of the measuring probe 10 touches the surface of the dry die. The operator can recognize when the end of the measuring rod accurately contacts the surface of the material.

As shown in FIGS. 1 and 2, the processing tool unit 200 is mainly equipped with a processing tool 210 at its front end, and the processing tool 210 may be coupled to the driving spindle 220. The drive spindle 220 may be rotatably coupled to the drive motor 240 supported on the spindle bracket 230.

This processing tool unit 200 can be coupled to the linear motor unit 300 to enable transport on an axis. Referring mainly to FIG. 2, the linear motor unit 300 may include an X-axis transfer unit 310 and a Z-axis transfer unit 320.

The X-axis transfer unit 310 includes an X-axis linear motor 311 and an It may include a motor drive 500.

Here, referring mainly to FIG. 5, the X-axis and Y-axis linear motors 311 and 321 may be configured as movable magnet-type linear motors.

Referring to FIGS. 1 and 4, the method of measuring the processing origin by a 5-axis tooth processing machine of this configuration involves contacting an energized wet die with an energized measuring probe 10 coupled to the drive spindle to measure the X-axis, Y-axis, and Z Measuring the reference origin for the axes, α, and β (S100); And it may include measuring the processing origin with respect to the reference origin (S200).

The step of measuring the reference origin (S100) includes setting the initial zero point of the And it may include a step (S120) of moving the measuring probe 10 up and down in the Z-axis direction at least several times and capturing the remaining zero points of the Z-axis, α, and β when it contacts the workpiece of the wet die.

In the step of setting the initial zero point of the In the above touching process, the measurement probe 10 is lowered only in the Z-axis direction, so the initial zero point in the X-direction is determined.

Next, in the step (S120) of capturing the remaining zero points, the remaining zero points are captured by moving the driving spindle slightly up/down in the Z-axis direction in 0.001 mm increments.

In the step of measuring the machining origin (S200), the initial zero point and the remaining zero point may be modified by data sheet values including the width-to-height ratio and material of the tooth workpiece.

Here, the data sheet value may include the specifications of the workpiece being input in advance and data such as whether it is made of zirconia.

By going through these steps, (0,0,0,0,0) of the By minimizing positioning errors, processing precision can be improved and product yield can be excellent.

Above, the present invention has been described in detail using preferred embodiments, but the scope of the present invention is not limited to the specific embodiments and should be interpreted in accordance with the appended claims. Additionally, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

10: Measuring probe
100: Workbed part 110: Dry die
111: 1st dry jig 112: 2nd dry jig
120: wet die 121: wet jig
122: Pick-up station 130: Central bulkhead
140: Dust collection unit
200: processing tool unit 210: processing tool
220: Drive spindle 230: Spindle bracket
240: Drive motor 300: Linear motor unit
310: X-axis transfer unit 320: Z-axis transfer unit

Claims (3)

Measuring the reference origin for the and
A method of measuring the machining origin of a 5-axis tooth processing machine, comprising the step of measuring the machining origin with respect to the reference origin. According to paragraph 1,
The step of measuring the reference origin is,
Moving the measuring probe up/down in the Z-axis direction and setting the initial zero point of the X-axis when it contacts the workpiece of the wet die; and
Measuring the processing origin of the 5-axis tooth processing machine, comprising the step of moving the measuring probe up and down in the Z-axis direction at least several times and capturing the residual zero points of the Z-axis, α, and β when it contacts the workpiece of the wet die. method. According to paragraph 2,
In the step of measuring the machining origin, the initial zero point and the remaining zero point are modified by data sheet values including the width-to-height ratio and material of the tooth workpiece.

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