Calibration device of dental engraving and milling machine and calibration method thereof

Abstract

The invention discloses a calibration device of a dental engraving and milling machine, and belongs to the technical field of medical instruments, the calibration device comprises a calibration jig and a photoelectric sensor, the calibration jig is detachably mounted on a clamp, the photoelectric sensor is detachably mounted on a main shaft, and the photoelectric sensor is detachably mounted on the main shaft. And the main shaft drives the photoelectric sensor to sense the structure of the calibration jig so as to carry out zero calibration on the motion shaft of the dental engraving and milling machine. The invention further discloses a calibration method of the dental engraving and milling machine. The calibration jig is matched with the photoelectric sensor to calibrate the zero point of the motion axis of the dental engraving and milling machine, so that the step of calibrating the zero point of the motion axis of the dental engraving and milling machine is simplified, meanwhile, the accuracy of calibrating the zero point of the motion axis of the dental engraving and milling machine is improved, and meanwhile, the waste of materials is also avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a calibration device and a calibration method for a dental engraving and milling machine. Background Art

[0002] In order to achieve zero calibration for existing five-axis dental engraving and milling machines and avoid using professional calibration tools and techniques in the numerical control field in the dental field, a calibration method using a standard block and a calculation formula is adopted. In this method, a specific material is clamped by a fixture at a specific position to cut the standard block. After cutting, the actual value of the standard block is measured, and then the zero offset of each axis is inversely calculated, and the zero value of the moving axis is calibrated manually or automatically to complete the zero calibration of the dental engraving and milling machine. This method not only wastes materials, but also is subject to differences in the measuring tools and measuring rigor of the operator, and it is difficult to ensure the accuracy of calibration.

[0003] Therefore, it is urgent to design a calibration device and a calibration method for a dental engraving and milling machine to solve the problems of waste of zero calibration materials and poor calibration accuracy mentioned above. Summary of the Invention

[0004] To solve the technical problems of waste of zero calibration materials and poor calibration accuracy mentioned in the background art, a calibration device and a calibration method for a dental engraving and milling machine are provided to solve the above problems.

[0005] To achieve the above object, the specific technical solutions of the calibration device and the calibration method for the dental engraving and milling machine of the present invention are as follows: A calibration device for a dental engraving and milling machine includes a calibration jig and a photoelectric sensor. The calibration jig is detachably installed on the fixture, and the photoelectric sensor is detachably installed on the spindle. The spindle drives the photoelectric sensor to sense the structure of the calibration jig, thereby performing zero calibration on the moving axis of the dental engraving and milling machine.

[0006] Further, the calibration jig includes a calibration ring. A measurement through hole is provided at the center position of the calibration ring, and a calibration surface is fixedly connected to the bottom of the measurement through hole, so that the photoelectric sensor performs zero calibration on the moving axis of the dental engraving and milling machine by detecting the calibration ring and the calibration surface.

[0007] Further, the calibration surface is a circular surface matching the measurement through hole or a semi-circular surface matching the measurement through hole.

[0008] Another object of the present invention is to provide a calibration method for a dental engraving and milling machine. The calibration method for the dental engraving and milling machine uses the above-mentioned calibration device for the dental engraving and milling machine, and includes the following steps: S1. Obtain the X-axis zero point of the X-axis moving horizontally on the first plane and the Y-axis zero point of the Y-axis moving longitudinally on the first plane; S2. Determine the zero point of the Z-axis moving in the direction perpendicular to the first plane, the zero point of the A-axis rotating around the X-axis, and the zero point of the B-axis rotating around the Y-axis based on the zero points of the X-axis and Y-axis; S3. Obtain the zero points of the motion axes of the dental carving and milling machine based on the zero points of the X-axis, Y-axis, Z-axis, A-axis, and B-axis, thereby completing the zero point calibration of the motion axes of the dental carving and milling machine.

[0009] Furthermore, in S1, the acquisition of the zero point of the X-axis includes: Control the main spindle to move the sensing end of the photoelectric sensor into the measurement through-hole and make the sensing end of the photoelectric sensor located above the calibration surface; Control the photoelectric sensor to move in the positive X-axis direction until the sensing end of the photoelectric sensor detects the edge of the measurement through-hole, stop the X-axis movement, and record the first X-axis measurement value of the photoelectric sensor moving in the positive X-axis direction ; Control the photoelectric sensor to move in the negative X-axis direction until the sensing end of the photoelectric sensor detects the edge of the measurement through-hole, stop the X-axis movement, and record the second X-axis measurement value of the photoelectric sensor moving in the negative X-axis direction ; According to the first X-axis measurement value and the second X-axis measurement value Obtain the position parameter of the zero point of the X-axis ; The position parameter of the zero point of the X-axis The calculation formula is: ; Thus, the zero point coordinates of the X-axis are ( , 0).

[0010] Furthermore, in S1, the acquisition of the zero point of the Y-axis includes: Control the main spindle to move the sensing end of the photoelectric sensor into the measurement through-hole and make the sensing end of the photoelectric sensor located above the calibration surface; Control the photoelectric sensor to move in the positive Y-axis direction until the sensing end of the photoelectric sensor detects the edge of the measurement through-hole, stop the Y-axis movement, and record the first Y-axis measurement value of the photoelectric sensor moving in the positive Y-axis direction ; Control the photoelectric sensor to move in the negative Y-axis direction until the sensing end of the photoelectric sensor detects the edge of the measurement through-hole, stop the Y-axis movement, and record the second Y-axis measurement value of the photoelectric sensor moving in the negative Y-axis direction ; According to the first Y-axis measurement value and the second Y-axis measurement value Obtain the position parameter of the zero point of the Y-axis ; The position parameter of the Y-axis zero point The calculation formula is: ; Thus, the zero point coordinates of the y-axis are (0, ).

[0011] Furthermore, in S2, obtaining the Z-axis zero point includes: Determine the origin coordinates of the first plane based on the X-axis zero point and the Y-axis zero point ( , ); Control the photoelectric inductor to be located at the origin coordinates of the first plane. The photoelectric inductor moves along the Z-axis until the sensing end of the photoelectric inductor touches the calibration surface, and the Z-axis stops moving. The contact position is the position of the Z-axis zero point , thus, the zero point coordinates of the Z-axis are ( , , ).

[0012] Furthermore, in S2, obtaining the A-axis zero point includes: Determine the origin coordinates of the first plane based on the X-axis zero point and the Y-axis zero point ( , ); Control the sensing end of the photoelectric inductor to be located at the origin coordinates of the first plane; After controlling the sensing end of the photoelectric inductor to move along the Z-axis away from the calibration jig by a first distance, control the photoelectric inductor to move along the positive Y-axis by a second distance so that the sensing end of the photoelectric inductor is located on the upper surface of the calibration ring; Control the sensing end of the photoelectric inductor to move along the Z-axis towards the calibration jig so that the sensing end of the photoelectric inductor contacts the upper surface of the calibration ring, and the Z-axis stops moving. Record the first A-axis measurement value ; Control the sensing end of the photoelectric inductor to reset to the origin coordinates of the first plane; After controlling the sensing end of the photoelectric inductor to move along the Z-axis away from the calibration jig by a first distance, control the photoelectric inductor to move along the negative Y-axis by a second distance so that the sensing end of the photoelectric inductor is located on the upper surface of the calibration ring; Control the sensing end of the photoelectric inductor to move along the Z-axis towards the calibration jig so that the sensing end of the photoelectric inductor contacts the upper surface of the calibration ring, and the Z-axis stops moving. Record the second A-axis measurement value ; Obtain the position parameter of the A-axis zero point according to the first A-axis measurement value and the second A-axis measurement value ; ; Position parameter of the zero point of axis A The calculation formula is: .

[0013] Furthermore, it also includes the calibration of the zero point of axis A. The calibration of the zero point of axis A includes: When is positive, After controlling the sensing end of the photoelectric inductor to reset to the origin coordinate position of the first plane, control the sensing end of the photoelectric inductor to move along the Z-axis away from the calibration jig by a first distance, and then control the photoelectric inductor to move along the positive Y-axis by a second distance, so that the sensing end of the photoelectric inductor is located on the upper surface of the calibration ring. Control the sensing end of the photoelectric inductor to move along the Z-axis towards the calibration jig After a distance, the Z-axis stops moving, and control the calibration jig to rotate around the X-axis until the sensing end of the photoelectric inductor contacts the upper surface of the calibration ring, completing the calibration of the zero point of axis A; When is negative, After controlling the sensing end of the photoelectric inductor to reset to the origin coordinate position of the first plane, control the sensing end of the photoelectric inductor to move along the Z-axis away from the calibration jig by a first distance, and then control the photoelectric inductor to move along the negative Y-axis by a second distance, so that the sensing end of the photoelectric inductor is located on the upper surface of the calibration ring. Control the sensing end of the photoelectric inductor to move along the Z-axis towards the calibration jig After a distance, the Z-axis stops moving, and control the calibration jig to rotate around the X-axis until the sensing end of the photoelectric inductor contacts the upper surface of the calibration ring, completing the calibration of the zero point of axis A.

[0014] Furthermore, in S2, the acquisition of the zero point of axis B includes: Determine the origin coordinates of the first plane according to the zero point of the X-axis and the zero point of the Y-axis; Control the sensing end of the photoelectric inductor to be located at the origin coordinate position of the first plane; After controlling the sensing end of the photoelectric inductor to move along the Z-axis away from the calibration jig by a first distance, control the photoelectric inductor to move along the positive X-axis by a second distance, so that the sensing end of the photoelectric inductor is located on the upper surface of the calibration ring; Control the sensing end of the photoelectric inductor to move along the Z-axis towards the calibration jig, so that the sensing end of the photoelectric inductor contacts the upper surface of the calibration ring, the Z-axis stops moving, and record the first measured value of axis B ; Control the sensing end of the photoelectric inductor to reset to the origin coordinate position of the first plane; After controlling the sensing end of the photoelectric sensor to move away from the calibration fixture along the Z-axis by a first distance, control the photoelectric sensor to move in the reverse X-axis direction by a second distance so that the sensing end of the photoelectric sensor is located on the upper surface of the calibration ring; Control the sensing end of the photoelectric sensor to move towards the calibration fixture along the Z-axis so that the sensing end of the photoelectric sensor contacts the upper surface of the calibration ring, stop the movement of the Z-axis, and record the second B-axis measurement value ; According to the first B-axis measurement value and the second B-axis measurement value obtain the position parameter of the B-axis zero point ; The position parameter of the B-axis zero point The calculation formula is: .

[0015] The calibration device and calibration method of the dental engraving and milling machine of the present invention have the following advantages: The present invention calibrates the zero point of the moving axis of the dental engraving and milling machine by means of a calibration fixture in cooperation with a photoelectric sensor, simplifies the steps of calibrating the zero point of the moving axis of the dental engraving and milling machine, improves the accuracy of calibrating the zero point of the moving axis of the dental engraving and milling machine, and also avoids waste of materials. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the calibration device of the dental engraving and milling machine of the present invention; Figure 2 is a schematic structural diagram of the first calibration fixture of the present invention; Figure 3 is a schematic structural diagram of the second calibration fixture of the present invention; Figure 4 is a flowchart of the calibration method of the dental engraving and milling machine of the present invention; Figure 5 is a schematic diagram of the principle of determining the X-axis zero point and Y-axis zero point in the calibration method of the dental engraving and milling machine of the present invention; Figure 6 is a schematic diagram of the A-axis zero point calibration principle in the calibration method of the dental engraving and milling machine of the present invention; Figure 7 is a schematic diagram of measuring the first A-axis measurement value by contacting the photoelectric sensor with the calibration ring in the present invention; Figure 8 is a schematic diagram of measuring the second A-axis measurement value by contacting the photoelectric sensor with the calibration ring in the present invention.

[0017] Explanation of the marks in the figure: 1. Calibration fixture; 101. Calibration ring; 102. Measurement through hole; 103. Calibration surface; 2. Photoelectric sensor; 201. Sensing end; 3. Fixture; 4. Spindle. Detailed implementation mode

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of the present invention and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0020] The following refers to the attached Figure 1 to the attached Figure 8 Describe the calibration device and calibration method of the dental engraving and milling machine of the present invention.

[0021] The calibration of the existing dental engraving and milling machine is to clamp a specific material cutting standard block with a fixture 3 at a specific position. After the cutting is completed, the actual value of the standard block is measured, and then the zero offset of each axis is calculated inversely, and then the zero value of the moving axis is calibrated manually or automatically to complete the zero calibration of the dental engraving and milling machine. This method not only wastes materials, but also is subject to differences in the measuring tools and measuring rigor of the operators, and it is difficult to guarantee the accuracy of calibration.

[0022] Therefore, the present invention provides a calibration device for a dental engraving and milling machine, as Figure 1 shown, including a calibration jig 1 and a photoelectric inductor 2. The calibration jig 1 is detachably installed on the fixture 3, and the photoelectric inductor 2 is detachably installed on the spindle 4. The spindle 4 drives the photoelectric inductor 2 to sense the structure of the calibration jig 1 so as to perform zero calibration on the moving axis of the dental engraving and milling machine. Specifically, the spindle 4 is a processing axis for clamping a tool during processing. The calibration jig 1 is clamped by the fixture 3, and the photoelectric inductor 2 is clamped by the petal-shaped clamp of the spindle 4. By controlling the movement of the fixture 3 and the spindle 4, the movement of the calibration jig 1 and the photoelectric inductor 2 is driven, and the calibration jig 1 and the photoelectric inductor 2 cooperate to perform zero calibration on the moving axis of the dental engraving and milling machine.

[0023] Preferably, as Figure 2As shown in the figure, the calibration fixture 1 includes a calibration ring 101. A measurement through-hole 102 is provided at the center position of the calibration ring 101. A calibration surface 103 is fixedly connected to the bottom of the measurement through-hole 102, so that the photoelectric inductor 2 calibrates the zero point of the moving axis of the dental milling machine by identifying the structures of the calibration ring 101 and the calibration surface 103.

[0024] Preferably, as Figure 2 shown in the figure, the calibration surface 103 can be a circular surface matching the measurement through-hole 102. At the same time, in order to further save materials and facilitate observation during installation by personnel, as Figure 3 shown in the figure, it can also be a semi-circular surface matching the measurement through-hole 102.

[0025] Another object of the present invention is to provide a calibration method for a dental milling machine, using the above-mentioned calibration device for a dental milling machine, as Figure 4 shown in the figure, including the following steps: S1. Obtain the X-axis zero point of the X-axis moving horizontally on the first plane and the Y-axis zero point of the Y-axis moving longitudinally on the first plane; As Figure 5 shown in the figure, the obtaining of the X-axis zero point includes: Control the main shaft 4 to move the sensing end 201 of the photoelectric inductor 2 into the measurement through-hole 102, and make the sensing end 201 of the photoelectric inductor 2 located above the calibration surface 103 to avoid measurement errors caused by the contact between the sensing end 201 and the calibration surface 103; Control the photoelectric inductor 2 to move in the positive X-axis direction until the sensing end 201 of the photoelectric inductor 2 detects the edge of the measurement through-hole 102, the X-axis stops moving, and record the first X-axis measurement value of the photoelectric inductor 2 moving in the positive X-axis direction ; Control the photoelectric inductor 2 to move in the negative X-axis direction until the sensing end 201 of the photoelectric inductor 2 detects the edge of the measurement through-hole 102, the X-axis stops moving, and record the second X-axis measurement value of the photoelectric inductor 2 moving in the negative X-axis direction ; According to the first X-axis measurement value and the second X-axis measurement value obtain the position parameter of the X-axis zero point ; The position parameter of the X-axis zero point is calculated by the formula: ; Thus, the zero point coordinates of the X-axis are obtained as ( , 0).

[0026] As Figure 5 shown in the figure, the obtaining of the Y-axis zero point includes: Control the main shaft 4 to move the sensing end 201 of the photoelectric sensor 2 into the measurement through-hole 102, and make the sensing end 201 of the photoelectric sensor 2 above the calibration surface 103 to avoid measurement errors caused by the contact between the sensing end 201 and the calibration surface 103; Control the photoelectric sensor 2 to move in the positive Y-axis direction until the sensing end 201 of the photoelectric sensor 2 detects the edge of the measurement through-hole 102, the Y-axis stops moving, and record the first Y-axis measurement value of the photoelectric sensor 2 moving in the positive Y-axis direction ; Control the photoelectric sensor 2 to move in the negative Y-axis direction until the sensing end 201 of the photoelectric sensor 2 detects the edge of the measurement through-hole 102, the Y-axis stops moving, and record the second Y-axis measurement value of the photoelectric sensor 2 moving in the negative Y-axis direction ; According to the first Y-axis measurement value and the second Y-axis measurement value Obtain the position parameter of the Y-axis zero point ; The position parameter of the Y-axis zero point The calculation formula is: ; Thus, it can be obtained that the zero coordinate of the y-axis is (0, ).

[0027] S2. Determine the Z-axis zero point of the Z-axis moving in the direction perpendicular to the first plane, the A-axis zero point of the A-axis rotating around the X-axis, and the B-axis zero point of the B-axis rotating around the Y-axis according to the X-axis zero point and the Y-axis zero point; The acquisition of the Z-axis zero point includes: Determine the origin coordinates of the first plane according to the X-axis zero point and the Y-axis zero point ( , ); Control the photoelectric sensor 2 to be located at the origin coordinates of the first plane ( , ), the photoelectric sensor 2 moves along the Z-axis until the sensing end 201 of the photoelectric sensor 2 touches the calibration surface 103, the Z-axis stops moving, and the contact position is the position of the Z-axis zero point , thus obtaining that the zero coordinate of the Z-axis is ( , , ).

[0028] As Figure 6 shown, the acquisition of the A-axis zero point includes: Determine the origin coordinates of the first plane according to the X-axis zero point and the Y-axis zero point ( , ); Control the sensing end 201 of the photoelectric sensor 2 to be located at the origin coordinates of the first plane ( , ); After controlling the sensing end 201 of the photoelectric sensor 2 to move away from the calibration jig 1 along the Z-axis to the first distance D1, control the photoelectric sensor 2 to move in the positive Y-axis direction by the second distance D2, so that the sensing end 201 of the photoelectric sensor 2 is located on the upper surface of the calibration ring 101; Control the sensing end 201 of the photoelectric sensor 2 to move towards the calibration jig 1 along the Z-axis, so that the sensing end 201 of the photoelectric sensor 2 contacts the upper surface of the calibration ring 101. As Figure 7 shown, stop the movement of the Z-axis and record the first A-axis measurement value ; Control the sensing end 201 of the photoelectric sensor 2 to reset to the origin coordinates of the first plane ( , ); After controlling the sensing end 201 of the photoelectric sensor 2 to move away from the calibration jig 1 along the Z-axis to the first distance D1, control the photoelectric sensor 2 to move in the reverse Y-axis direction by the second distance D2, so that the sensing end 201 of the photoelectric sensor 2 is located on the upper surface of the calibration ring 101; Control the sensing end 201 of the photoelectric sensor 2 to move towards the calibration jig 1 along the Z-axis, so that the sensing end 201 of the photoelectric sensor 2 contacts the upper surface of the calibration ring 101. As Figure 8 shown, stop the movement of the Z-axis and record the second A-axis measurement value ; Obtain the position parameter of the A-axis zero point according to the first A-axis measurement value and the second A-axis measurement value ; ; The calculation formula for the position parameter of the A-axis zero point is: .

[0029] Furthermore, the calibration of the A-axis zero point is also included in the acquisition of the A-axis zero point. The calibration of the A-axis zero point includes: When is negative, as Figure 6 shown, After controlling the sensing end 201 of the photoelectric sensor 2 to reset to the origin coordinates of the first plane, control the sensing end 201 of the photoelectric sensor 2 to move away from the calibration jig 1 along the Z-axis to the first distance D1, and then control the photoelectric sensor 2 to move in the reverse Y-axis direction by the second distance D2, so that the sensing end 201 of the photoelectric sensor 2 is located on the upper surface of the calibration ring 101, Control the sensing end 201 of the photoelectric sensor 2 to move along the Z-axis towards the calibration jig 1 After the distance, the Z-axis stops moving, and control the calibration jig 1 to rotate around the X-axis until the sensing end 201 of the photoelectric sensor 2 contacts the upper surface of the calibration ring 101 to complete the calibration of the zero point of the A-axis; Similarly, when is positive, After the sensing end 201 of the photoelectric sensor 2 is reset to the origin coordinate position of the first plane, control the sensing end 201 of the photoelectric sensor 2 to move along the Z-axis away from the calibration jig 1 to the first distance D1, and then control the photoelectric sensor 2 to move along the positive Y-axis by the second distance D2 so that the sensing end 201 of the photoelectric sensor 2 is located on the upper surface of the calibration ring 101, Control the sensing end 201 of the photoelectric sensor 2 to move along the Z-axis towards the calibration jig 1 After the distance, the Z-axis stops moving, and control the calibration jig 1 to rotate around the X-axis until the sensing end 201 of the photoelectric sensor 2 contacts the upper surface of the calibration ring 101 to complete the calibration of the zero point of the A-axis.

[0030] It should be noted that the first distance is only the schematic distance in the figure, which can be selected according to the actual situation, and only needs to keep the first distance consistent during the process of obtaining the zero point of the A-axis and keep the first distance consistent during the calibration of the zero point of the A-axis; at the same time, the principle of obtaining the zero point of the B-axis is the same as that of obtaining the zero point of the A-axis, and the first distance in the process of obtaining the zero point of the B-axis is the same as the first distance in the process of obtaining the zero point of the A-axis.

[0031] It should be noted that the second distance is determined according to the size specification of the calibration jig 1, and it is necessary to ensure that when the sensing end 201 moves towards the calibration jig, the sensing end 201 can contact the upper surface of the calibration ring 101.

[0032] The principle of obtaining the zero point of the B-axis is the same as that of obtaining the zero point of the A-axis. Thus, it can be known that the obtaining of the zero point of the B-axis includes: Determine the origin coordinates of the first plane according to the zero points of the X-axis and the Y-axis; Control the sensing end 201 of the photoelectric sensor 2 to be located at the origin coordinates of the first plane; After controlling the sensing end 201 of the photoelectric sensor 2 to move along the Z-axis away from the calibration jig 1 to the first distance, control the photoelectric sensor 2 to move along the positive X-axis by the second distance so that the sensing end 201 of the photoelectric sensor 2 is located on the upper surface of the calibration ring 101; Control the sensing end 201 of the photoelectric sensor 2 to move along the Z-axis towards the calibration jig 1 so that the sensing end 201 of the photoelectric sensor 2 contacts the upper surface of the calibration ring 101, the Z-axis stops moving, and record the first B-axis measurement value ; Control the sensing end 201 of the photoelectric sensor 2 to reset to the origin coordinate position of the first plane; After controlling the sensing end 201 of the photoelectric sensor 2 to move away from the calibration jig 1 along the Z-axis by a first distance, control the photoelectric sensor 2 to move in the reverse X-axis direction by a second distance, so that the sensing end 201 of the photoelectric sensor 2 is located on the upper surface of the calibration ring 101; Control the sensing end 201 of the photoelectric sensor 2 to move towards the calibration jig 1 along the Z-axis, so that the sensing end 201 of the photoelectric sensor 2 contacts the upper surface of the calibration ring 101, stop the Z-axis movement, and record the second B-axis measurement value ; According to the first B-axis measurement value and the second B-axis measurement value Obtain the position parameter of the B-axis zero point ; The position parameter of the B-axis zero point The calculation formula is: .

[0033] At the same time, further, the calibration of the B-axis zero point is also included in the acquisition of the B-axis zero point. The calibration principle of the B-axis zero point is the same as that of the A-axis zero point. Therefore, it can be obtained that the calibration of the B-axis zero point includes: When is positive, After controlling the sensing end 201 of the photoelectric sensor 2 to reset to the origin coordinate position of the first plane, control the sensing end 201 of the photoelectric sensor 2 to move away from the calibration jig 1 along the Z-axis by a first distance, and then control the photoelectric sensor 2 to move in the positive X-axis direction by a second distance, so that the sensing end 201 of the photoelectric sensor 2 is located on the upper surface of the calibration ring 101, Control the sensing end 201 of the photoelectric sensor 2 to move towards the calibration jig 1 along the Z-axis After a distance, stop the Z-axis movement, and control the calibration jig 1 to rotate around the Y-axis until the sensing end 201 of the photoelectric sensor 2 contacts the upper surface of the calibration ring 101 to complete the calibration of the B-axis zero point; When is negative, After controlling the sensing end 201 of the photoelectric sensor 2 to reset to the origin coordinate position of the first plane, control the sensing end 201 of the photoelectric sensor 2 to move away from the calibration jig 1 along the Z-axis by a first distance, and then control the photoelectric sensor 2 to move in the reverse X-axis direction by a second distance, so that the sensing end 201 of the photoelectric sensor 2 is located on the upper surface of the calibration ring 101, Control the sensing end 201 of the photoelectric sensor 2 to move towards the calibration jig 1 along the Z-axis After the distance, the movement of the Z-axis stops, and the calibration fixture 1 is controlled to rotate around the Y-axis until the sensing end 201 of the control photoinductor 2 contacts the upper surface of the calibration ring 101, completing the calibration of the zero point of the B-axis.

[0034] S3. Based on the zero points of the X-axis, Y-axis, Z-axis, A-axis, and B-axis, the zero points of the movement axes of the dental carving and milling machine are obtained, thus completing the zero point calibration of the movement axes of the dental carving and milling machine.

[0035] The present invention calibrates the zero points of the movement axes of the dental carving and milling machine through the cooperation of the calibration fixture 1 and the photoinductor 2, simplifies the zero point calibration of the movement axes of the dental carving and milling machine, improves the accuracy of the zero point calibration of the movement axes of the dental carving and milling machine, and also avoids the waste of materials.

[0036] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A calibration device for a dental carving and milling machine, characterized in that, It includes a calibration jig and a photoelectric inductor. The calibration jig is detachably installed on the fixture, and the photoelectric inductor is detachably installed on the spindle. The spindle drives the photoelectric inductor to sense the structure of the calibration jig, thereby performing zero calibration on the moving axes of the dental engraving and milling machine.

2. The calibration device of the dental milling machine according to claim 1, characterized in that, The calibration jig includes a calibration ring. A measurement through-hole is provided at the center position of the calibration ring, and a calibration surface is fixedly connected to the bottom of the measurement through-hole, so that the photoelectric inductor performs zero calibration on the moving axes of the dental engraving and milling machine by detecting the calibration ring and the calibration surface.

3. The calibration device of the dental milling machine according to claim 2, characterized in that, The calibration surface is a circular surface matching the measurement through-hole or a semi-circular surface matching the measurement through-hole.

4. A calibration method for a dental milling machine, using the calibration device of the dental milling machine as described in any one of claims 1-3, characterized in that, It includes the following steps: S1. Obtain the X-axis zero point of the X-axis moving horizontally on the first plane and the Y-axis zero point of the Y-axis moving longitudinally on the first plane; S2. Determine the Z-axis zero point of the Z-axis moving in the direction perpendicular to the first plane, the A-axis zero point of the A-axis rotating around the X-axis, and the B-axis zero point of the B-axis rotating around the Y-axis according to the X-axis zero point and the Y-axis zero point; S3. Obtain the zero points of the moving axes of the dental engraving and milling machine according to the X-axis zero point, the Y-axis zero point, the Z-axis zero point, the A-axis zero point, and the B-axis zero point, thereby completing the zero calibration of the moving axes of the dental engraving and milling machine.

5. The calibration method of the dental milling machine according to claim 4, characterized in that, In S1, the obtaining of the X-axis zero point includes: Controlling the spindle to move the sensing end of the photoelectric inductor into the measurement through-hole and making the sensing end of the photoelectric inductor located above the calibration surface; Control the photoelectric sensor to move in the positive X-axis direction until the sensing end of the photoelectric sensor detects the edge of the measurement through-hole, stop the X-axis movement, and record the first X-axis measurement value of the photoelectric sensor moving in the positive X-axis direction ; Control the photoelectric inductor to move in the reverse direction along the X-axis until the sensing end of the photoelectric inductor detects the edge of the measurement through-hole, stop the movement of the X-axis, and record the second X-axis measurement value of the photoelectric inductor moving in the reverse direction along the X-axis ; According to the first X-axis measurement value and the second X-axis measurement value obtain the position parameter of the X-axis zero point ; Position parameter of the X-axis zero point The calculation formula is: ； Thus, the zero coordinate of the X-axis is ( , 0).

6. The calibration method of the dental milling machine according to claim 4, characterized in that In S1, the obtaining of the Y-axis zero point includes: Controlling the spindle to move the sensing end of the photoelectric inductor into the measurement through-hole and making the sensing end of the photoelectric inductor located above the calibration surface; Control the photoelectric sensor to move in the positive Y-axis direction until the sensing end of the photoelectric sensor detects the edge of the measurement through-hole, stop the Y-axis movement, and record the first Y-axis measurement value of the photoelectric sensor moving in the positive Y-axis direction ; Control the photoelectric sensor to move in the reverse direction along the Y-axis until the sensing end of the photoelectric sensor detects the edge of the measurement through-hole, stop the movement of the Y-axis, and record the second Y-axis measurement value of the reverse movement of the photoelectric sensor along the Y-axis ; According to the first Y-axis measurement value and the second Y-axis measurement value obtain the position parameter of the Y-axis zero point ; The position parameter of the Y-axis zero point The calculation formula is: ； Thus, it can be obtained that the zero coordinate of the y-axis is (0, ).

7. The calibration method of the dental milling machine according to claim 4, characterized in that, In S2, the obtaining of the Z-axis zero point includes: Determine the origin coordinates of the first plane based on the X-axis zero point and the Y-axis zero point ( , ); Control the origin coordinate position of the photoelectric sensor on the first plane. The photoelectric sensor moves along the Z-axis until the sensing end of the photoelectric sensor touches the calibration surface. The movement of the Z-axis stops, and the contact position is the position of the Z-axis zero point. , thus it can be obtained that the zero coordinate of the Z-axis is ( , , ).

8. The calibration method of the dental milling machine according to claim 4, characterized in that, In S2, the obtaining of the A-axis zero point includes: Determine the origin coordinates of the first plane based on the X-axis zero point and the Y-axis zero point ( , ); Controlling the sensing end of the photoelectric inductor to be located at the origin coordinate position of the first plane; After controlling the sensing end of the photoelectric inductor to move along the Z-axis away from the calibration jig by a first distance, controlling the photoelectric inductor to move along the positive Y-axis by a second distance, so that the sensing end of the photoelectric inductor is located on the upper surface of the calibration ring; Control the sensing end of the photoelectric sensor to move along the Z-axis towards the calibration jig, so that the sensing end of the photoelectric sensor contacts the upper surface of the calibration ring, stop the movement of the Z-axis, and record the first A-axis measurement value ; Controlling the sensing end of the photoelectric inductor to reset to the origin coordinate position of the first plane; After controlling the sensing end of the photoelectric inductor to move along the Z-axis away from the calibration jig by a first distance, controlling the photoelectric inductor to move along the negative Y-axis by a second distance, so that the sensing end of the photoelectric inductor is located on the upper surface of the calibration ring; Control the sensing end of the photoelectric inductor to move along the Z-axis towards the calibration jig, so that the sensing end of the photoelectric inductor contacts the upper surface of the calibration ring. Stop the movement of the Z-axis and record the second A-axis measurement value ; According to the first A-axis measurement value and the second A-axis measurement value obtain the position parameter of the A-axis zero point ; Position parameter of the zero point of axis A The calculation formula is: 。 9. The calibration method of the dental engraving and milling machine according to claim 8, characterized in that, It also includes the calibration of the A-axis zero point. The calibration of the A-axis zero point includes: When is positive, After controlling the sensing end of the photoelectric inductor to reset to the origin coordinate position of the first plane, controlling the sensing end of the photoelectric inductor to move along the Z-axis away from the calibration jig by a first distance, and then controlling the photoelectric inductor to move along the positive Y-axis by a second distance, so that the sensing end of the photoelectric inductor is located on the upper surface of the calibration ring, Control the sensing end of the photoelectric inductor to move along the Z-axis towards the calibration jig After a certain distance, the Z-axis stops moving. Control the calibration jig to rotate around the X-axis until the sensing end of the photoelectric inductor contacts the upper surface of the calibration ring, completing the calibration of the zero point of the A-axis; When is negative, After controlling the sensing end of the photoelectric inductor to reset to the origin coordinate position of the first plane, controlling the sensing end of the photoelectric inductor to move along the Z-axis away from the calibration jig by a first distance, and then controlling the photoelectric inductor to move along the negative Y-axis by a second distance, so that the sensing end of the photoelectric inductor is located on the upper surface of the calibration ring, Control the sensing end of the photoelectric sensor to move along the Z-axis towards the calibration jig After a certain distance, the Z-axis stops moving. Control the calibration jig to rotate around the X-axis until the sensing end of the photoelectric sensor contacts the upper surface of the calibration ring, completing the calibration of the zero point of the A-axis.

10. The calibration method of the dental milling machine according to claim 4, characterized in that, In S2, the obtaining of the B-axis zero point includes: Determine the origin coordinate of the first plane according to the X-axis zero point and the Y-axis zero point; Controlling the sensing end of the photoelectric inductor to be located at the origin coordinate position of the first plane; After controlling the sensing end of the photoelectric sensor to move along the Z-axis away from the calibration fixture by a first distance, control the photoelectric sensor to move along the positive X-axis by a second distance so that the sensing end of the photoelectric sensor is located on the upper surface of the calibration ring; Control the sensing end of the photoelectric inductor to move along the Z-axis towards the calibration jig, so that the sensing end of the photoelectric inductor contacts the upper surface of the calibration ring, stop the Z-axis movement, and record the first B-axis measurement value ; Control the sensing end of the photoelectric sensor to reset to the origin coordinate position of the first plane; After controlling the sensing end of the photoelectric sensor to move along the Z-axis away from the calibration fixture by a first distance, control the photoelectric sensor to move along the negative X-axis by a second distance so that the sensing end of the photoelectric sensor is located on the upper surface of the calibration ring; Control the sensing end of the photoelectric sensor to move along the Z-axis towards the calibration jig, so that the sensing end of the photoelectric sensor contacts the upper surface of the calibration ring, stop the Z-axis movement, and record the second B-axis measurement value ; Based on the first B-axis measurement value and the second B-axis measurement value obtain the position parameter of the B-axis zero point ; Position parameter of the zero point of the B axis The calculation formula is: 。

Images