Precision adjustment method and mechanism of five-axis linkage denture engraving and milling machine

Abstract

The present application relates to the technical field of five-axis linkage false tooth engraving, in particular to a precision adjustment method and mechanism of a five-axis linkage false tooth engraving and milling machine, comprising the following steps: preparation before debugging; measuring the geometric precision of X, Y and Z axes; measuring the geometric precision of the electric spindle; measuring the positioning precision of X, Y and Z axes; respectively leveling A and B axes, and preliminarily measuring and calculating external offset A and B; finding the intersection coordinates of A and B axes, and preliminarily measuring and calculating external offset X / Y / Z; cutting a standard correction block, measuring the correction block precision; and completing precision debugging. Through multiple precision adjustment steps, the precision of each axis position is measured, the whole is adjusted in precision according to the precision adjustment standard, so that the precision of the false tooth engraving and milling machine during operation can meet the standard, the false tooth is more precise during processing, and the five-axis linkage false tooth engraving and milling machine can also move stably, thereby ensuring the precision and smooth surface quality of the false tooth cutting part.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of five-axis linkage denture engraving, in particular to a precision adjustment method and mechanism of a five-axis linkage denture engraving and milling machine. BACKGROUND

[0002] Dentures are generally made of zirconia porcelain blocks on a special dental engraving and milling machine. When processing, the zirconia porcelain block is fixed in the tray, and the tray is fixed on the engraving and milling machine. The processing spindle of the engraving and milling machine performs engraving, milling and other processing on the zirconia porcelain block;

[0003] The five-axis linkage denture engraving and milling machine includes five coordinate axes (three linear coordinate axes: X, Y, and Z axes, and two rotary coordinate axes: A and B axes), relies on advanced numerical control systems, servo systems, and software support, and the A and B axes are linked with the three linear axes X, Y, and Z to process complex spatial surfaces. The advantage is that the rotary coordinate has sufficient stroke range, is good at complex shape, high precision, short delivery time, small batch and multi-variety processing, and is suitable for denture processing, mainly engraving ceramic teeth, beauty patches, inlays, abutments, crowns, bridges, etc.

[0004] The five-axis linkage denture engraving and milling machine is a high-tech, high-precision and special processing center for processing complex curved surfaces. The precision adjustment of the five-axis linkage denture engraving and milling machine is a necessary basis for ensuring the precision of denture processing, and can ensure the precision of denture processing. With the increase in the number of denture engraving and milling machines, the denture engraving and milling machines cannot meet the relevant index standards during installation. The precision of the five-axis linkage denture engraving and milling machine is not precise when processing dentures, resulting in that the final processed dentures cannot be favored by the public. SUMMARY

[0005] In view of the above problems, the present application provides a precision adjustment method and mechanism of a five-axis linkage denture engraving and milling machine.

[0006] The present application provides the following technical solutions:

[0007] A precision adjustment method of a five-axis linkage denture engraving and milling machine, comprising the following steps:

[0008] S1, preparation before debugging;

[0009] S2, measuring the geometric precision of X, Y, and Z axes, and debugging the geometric precision of the linear axis according to the three-axis ordinary machining center debugging specification, including straightness, flatness and perpendicularity;

[0010] S3, measuring the geometric precision of the electric spindle;

[0011] S4, measure the positioning accuracy of X, Y, Z axis, according to the three-axis general machining center debugging specification to debug the positioning accuracy of linear axis, including positioning accuracy and repeat positioning accuracy;

[0012] S5, A, B axis is respectively found flat, preliminary measure the external offset A, B;

[0013] S6, find the intersection coordinates of A axis and B axis rotation axis, preliminary measure the external offset X / Y / Z;

[0014] S7, cutting standard correction block, measure correction block precision;

[0015] S8, precision debugging is completed.

[0016] As a kind of preferred technical scheme of precision adjustment method of five-axis linkage denture engraving and milling machine, in step S2, the micrometer is installed on the Z axis slide plate (4), and the head is slid on the base (1) B face and base (1) C face respectively.

[0017] As a kind of preferred technical scheme of precision adjustment method of five-axis linkage denture engraving and milling machine, in step S3, the micrometer is installed at any position of the base (1), and the head is on the surface of the electric spindle (5) detection rod, and the electric spindle (5) rotates one circle.

[0018] As a kind of preferred technical scheme of precision adjustment method of five-axis linkage denture engraving and milling machine, in step S4, the micrometer is fixed on the base (1), and the head is pressed on the lower plane of the Z axis slide plate (4), and the Z axis slide plate (4) is driven by the servo motor of the Z axis slide plate (4).

[0019] As a kind of preferred technical scheme of precision adjustment method of five-axis linkage denture engraving and milling machine, in step S5, preliminary measure the external offset A, B, the micrometer is fixed on the Z axis slide plate (4), and the head is pressed on the upper surface of the disc (7).

[0020] As a kind of preferred technical scheme of precision adjustment method of five-axis linkage denture engraving and milling machine, in step S6, preliminary measure the external offset X / Y / Z, after A, B axis is respectively found flat, the center of disc (7) and the intersection coordinates of A axis and B axis rotation axis coincide, find the leftmost coordinate value X1 and the rightmost coordinate value X2 of disc (7) with edge finder, find the frontmost coordinate value Y1 and the last coordinate value Y2 of disc (7), the electric spindle (5) drives the tool tip to touch the tool setting instrument, and records the coordinate value Z1, the electric spindle (5) touches the upper surface of disc (7) with tool tip, and records the coordinate value Z2.

[0021] As a kind of preferred technical scheme of the precision adjustment method of five-axis linkage denture engraving milling machine, in step S7, the precision of correction block is measured, the program is cut two correction blocks and is marked, the wall thickness t1 of No.1 face, the wall thickness t2 of No.2 face and the left correction block height h1, the right correction block height h2 are measured respectively using vernier caliper.

[0022] As a kind of preferred technical scheme of the precision adjustment method of five-axis linkage denture engraving milling machine, in step S7, enter the tool setting interface of equipment control screen, input the calculated each accurate outer offset coordinate value into corresponding axis coordinate, the absolute coordinate of control system and the coordinate of equipment coincide, the program is cut correction block again, and the length, width, height and wall thickness are measured.

[0023] A kind of precision adjustment mechanism of five-axis linkage denture engraving milling machine, including: 3 mobile axes and 2 rotating axes, 3 mobile axes are X-axis slide (2), Y-axis slide (3) and Z-axis slide (4) respectively, 2 rotating axes are A-axis frame (8) and B-axis disc (6) respectively, A-axis frame (8) is the selection axis of disc (7), B-axis disc (6) is the swing axis of disc (7), base (1) is the installation reference of whole machine, base (1) is marble material, its precision grade is 00 level, can be used as testing tool, motorized spindle (5) is cutting unit, disc (7) is blank.

[0024] The beneficial effects of the present application are: through multiple precision adjustment steps, the precision of each axis position is measured, the whole is adjusted in precision according to the precision adjustment standard, so that the precision of the denture engraving milling machine during operation can meet the standard, so that the denture is more precise during processing, and the five-axis linkage denture engraving milling machine can also be stable, so as to ensure the precision and smooth surface quality of the denture cutting piece. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0026] Figure 1 It is the overall movement schematic diagram of precision adjustment method and mechanism;

[0027] Figure 2 It is the flow schematic diagram of precision adjustment method;

[0028] Figure 3 It is the correction block schematic diagram of precision adjustment method;

[0029] Figure 4 It is the device control screen tool setting interface schematic diagram of precision adjustment method.

[0030] Marked in the figure: 1, base; 2, X axis; 3, Y axis; 4, Z axis; 5, electric spindle; 6, B axis; 7, disc; 8, A axis. DETAILED DESCRIPTION

[0031] The concept, specific structure and generated technical effects of the present application are clearly and completely described below in combination with the embodiments and drawings, so as to fully understand the purposes, schemes and effects of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. It should be noted that when a certain feature is referred to as being “fixed” or “connected” to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right and the like used in the present application are only relative to the relative position relationship of the components of the present application in the drawings.

[0032] Referring to Figure 1 The precision adjustment mechanism of a five-axis linkage denture engraving and milling machine shown in the figure includes: three moving shafts and two rotating shafts, the three moving shafts are X-axis slide plate (2), Y-axis slide plate (3) and Z-axis slide plate (4), the two rotating shafts are A-axis frame (8) and B-axis disc (6), the A-axis frame (8) is the selection shaft of the disc (7), the B-axis disc (6) is the swing shaft of the disc (7), the base (1) is the installation reference of the whole machine, the base (1) is made of marble material, the precision grade is 00 level, and can be used as a gauge, the electric spindle (5) is a cutting unit, and the disc (7) is a blank;

[0033] Referring to Figure 1 and 2 The precision adjustment method of a five-axis linkage denture engraving and milling machine shown in the figure, first, prepare before debugging, then measure the geometric precision of X, Y and Z axes, and debug the geometric precision of the straight line shaft according to the debugging specification of the three-axis ordinary machining center, including straightness, flatness and perpendicularity. Taking the Z-axis slide plate (4) as an example, the Z-axis slide plate (4) takes the Y-axis slide plate (3) as the installation reference, takes the C surface of the base (1) and the B surface of the base (1) as the dial reference surface, the dial gauge is installed on the Z-axis slide plate (4), the dial head slides on the B surface of the base (1) and the C surface of the base (1) respectively, and the dial value of the dial gauge jumps within 0.02mm, so the sliding straightness of the Z-axis slide plate (4) is 0.02mm, the perpendicularity of the Z-axis slide plate (4) and the X-axis slide plate (2) is 0.02mm, and the perpendicularity of the Z-axis slide plate (4) and the Y-axis slide plate (3) is 0.02mm, which can be determined to be qualified

[0034] Referring to Figure 1 and 2As shown in the figure, a five-axis linkage denture engraving mill precision adjustment method, the geometric accuracy of the electric spindle is measured, the geometric accuracy of the electric spindle (5) is mainly the shaft runout, the dial gauge is installed at any position on the base (1), the dial head is on the surface of the electric spindle (5) detection rod, the electric spindle (5) rotates one revolution, the dial gauge value runout range is within 0.002mm, which can be determined as qualified;

[0035] Referring to Figure 1 and 2 As shown in the figure, a five-axis linkage denture engraving mill precision adjustment method, the positioning accuracy of X, Y, Z axes is measured, the positioning accuracy and repeat positioning accuracy are adjusted according to the three-axis general machining center debugging specification. Taking Z axis as an example, the dial gauge is fixed on the base (1), the dial head is pressed on the lower plane of the Z axis slide plate (4), the Z axis slide plate (4) is driven by the servo motor of the Z axis slide plate (4), and the fixed displacement is 0.1mm after multiple translations, the dial gauge value runout range is within 0.01mm of the theoretical value 0.1mm, which can be determined as qualified;

[0036] Referring to Figure 1 and 2 As shown in the figure, a five-axis linkage denture engraving mill precision adjustment method, A and B axes are respectively leveled, and the external offsets A and B are preliminarily measured. The dial gauge is fixed on the Z axis slide plate (4), the dial head is pressed on the upper surface of the disc (7), the Z axis slide plate (4) is moved in the direction of the Y axis slide plate (3), the dial gauge value runout range of the whole stroke is within 0.02mm, and the external offset A at this time is recorded as A0; the Z axis slide plate (4) is moved in the direction of the X axis slide plate (2), the dial gauge value runout range of the whole stroke is within 0.02mm, and the external offset B at this time is recorded as B0;

[0037] Referring to Figure 1 and 2 As shown in the figure, a five-axis linkage denture engraving mill precision adjustment method, the intersection coordinates of A and B axes are found, and the external offsets X / Y / Z are preliminarily measured. After A and B axes are respectively leveled, it is defaulted that the center of the disc (7) and the intersection coordinates of A and B axes coincide, the edge finder is used to find the leftmost coordinate value X1 and the rightmost coordinate value X2 of the disc (7), then the external offset X0=(X1+X2) / 2, the frontmost coordinate value Y1 and the last coordinate value Y2 of the disc (7) are found, the external offset Y0=(Y1+Y2) / 2, the electric spindle (5) drives the tool tip to touch the tool setting instrument, and the coordinate value Z1 is recorded, the electric spindle (5) drives the tool tip to touch the upper surface of the disc (7), and the coordinate value Z2 is recorded. Given that the thickness of the disc (7) is Z3, the external offset Z0=Z1-Z2-Z1-Z3 / 2;

[0038] Referring to Figure 1 , 2The precision adjustment method of the five-axis linkage denture engraving milling machine shown in the drawings 1, 2, 3 and 4, a cutting standard correction block, measuring the correction block precision, running the program to cut two correction blocks and marking, using a vernier caliper to measure the wall thickness t1 of No. 1 face, the wall thickness t2 of No. 2 face and the left correction block height h1, the right correction block height h2. Apply the formula: outer offset Y=(t2-t1) / 2+Y0, calculate the accurate outer offset Y; apply the formula: outer offset Z=8-(Z1+Z2) / 2, where 8 is the standard height of the correction block, calculate the accurate outer offset Z; apply the formula: outer offset B=B0-(Z1-Z2) / 3, calculate the accurate outer offset B, enter the tool setting interface of the equipment control screen, input the calculated accurate outer offset coordinate values into the corresponding axis coordinates, the absolute coordinates of the control system coincide with the coordinates of the equipment, run the program to cut the correction block again, measure its length, width, height and wall thickness, if the deviation between the measured value and the theoretical value is within 0.02mm, the precision adjustment is completed.

[0039] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for adjusting the precision of a five-axis linkage dental prosthesis milling machine, characterized in that, Includes the following steps: S1. Preparations before debugging; S2. Measure the geometric accuracy of the X, Y, and Z axes, and adjust the geometric accuracy of the linear axes according to the adjustment specifications of a three-axis general machining center, including straightness, flatness, and perpendicularity. S3. Measure the geometric accuracy of the electric spindle; S4. Measure the positioning accuracy of the X, Y, and Z axes, and adjust the positioning accuracy of the linear axes according to the adjustment specifications of a three-axis general machining center, including positioning accuracy and repeatability. Level the S5, A, and B axes respectively, and make preliminary calculations of the external offsets A and B; S6. Find the coordinates of the intersection of the rotation axes A and B, and make a preliminary calculation of the external offset X / Y / Z; S7. Cut the standard calibration block and measure its accuracy; S8. Precision adjustment completed.

2. The precision adjustment method for the five-axis linkage dental prosthesis milling machine according to claim 1, characterized in that, In step S2, the dial indicator is mounted on the Z-axis slide plate (4), and the indicator head slides on the B surface of the base (1) and the C surface of the base (1) respectively.

3. The precision adjustment method for the five-axis linkage dental prosthesis milling machine according to claim 1, characterized in that, In step S3, the dial indicator is installed at any position on the base (1), the head of the indicator is on the surface of the probe of the electric spindle (5), and the electric spindle (5) rotates one revolution.

4. The precision adjustment method for the five-axis linkage dental prosthesis milling machine according to claim 1, characterized in that, In step S4, the dial indicator is fixed on the base (1), and the indicator head is pressed on the lower plane of the Z-axis slide plate (4). The Z-axis slide plate (4) is driven by the servo motor.

5. The precision adjustment method for the five-axis linkage dental prosthesis milling machine according to claim 1, characterized in that, In step S5, the external offsets A and B are initially measured, and the dial indicator is fixed on the Z-axis slide plate (4) with the dial indicator head pressing on the upper surface of the disk (7).

6. The precision adjustment method for the five-axis linkage dental prosthesis milling machine according to claim 1, characterized in that, In step S6, the external offset X / Y / Z is initially calculated. After the A and B axes are leveled, the center of the disk (7) coincides with the coordinates of the intersection of the rotation axes of the A and B axes. The leftmost coordinate value X1 and the rightmost coordinate value X2 of the disk (7) are found using the edge finder. The frontmost coordinate value Y1 and the backmost coordinate value Y2 of the disk (7) are found. The electric spindle (5) drives the tool tip to touch the tool setter and records the coordinate value Z1. The electric spindle (5) with the tool tip touches the upper surface of the disk (7) and records the coordinate value Z2.

7. The precision adjustment method for the five-axis linkage dental engraving and milling machine according to claim 1, characterized in that, In step S7, the accuracy of the calibration blocks is measured, the program is run to cut two calibration blocks and mark them, and the wall thickness t1 of surface 1, the wall thickness t2 of surface 2, the height h1 of the left calibration block, and the height h2 of the right calibration block are measured using vernier calipers.

8. The precision adjustment method for the five-axis linkage dental prosthesis milling machine according to claim 7, characterized in that, In step S7, the tool setting interface of the equipment control screen is entered, and the calculated precise external offset coordinate values ​​are input into the corresponding axis coordinates. The absolute coordinates of the control system coincide with the coordinates of the equipment. The program is run again to cut the correction block and measure its length, width, height and wall thickness.

9. A precision adjustment mechanism for a five-axis linkage dental engraving and milling machine according to claim 1, characterized in that, include: There are 3 moving axes and 2 rotating axes. The 3 moving axes are X-axis slide (2), Y-axis slide (3) and Z-axis slide (4). The 2 rotating axes are A-axis frame (8) and B-axis disk (6). A-axis frame (8) is the selection axis of disk (7). B-axis disk (6) is the swing axis of disk (7). The base (1) is the installation reference of the whole machine. The base (1) is made of marble with a precision grade of 00 and can be used as a gauge. The electric spindle (5) is the cutting unit and the disk (7) is the blank.

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