Angle head checking tool and checking method

Abstract

This invention relates to the field of CNC machining technology, and particularly to an angle head calibration tool and method. The calibration tool includes a base and a positioning adjustment mechanism. Inside the base, a bolt adapter hole is formed through its axis; at the bottom of the base, two wedge-shaped lugs are symmetrically arranged along its axis. The positioning adjustment mechanism includes a wedge nut and a bolt assembly; the wedge nut is positioned between the two wedge lugs and engages with them in a wedge-shaped fit; the bolt assembly passes through the bolt adapter hole from the top of the base and is threadedly connected to the wedge nut. This technical solution uses the aforementioned calibration tool to calibrate the angle head. By detecting the error value, it can predict in advance whether the angle head can be used normally and the degree of impact on subsequent manufacturing accuracy, thus identifying usage risks early, ensuring product manufacturing accuracy, and reducing product failures.

Description

Technical Field

[0001] This invention relates to the field of CNC machining technology, and in particular to an angle head calibration tool and calibration method. Background Technology

[0002] In CNC machining, narrow spaces and special positions often cannot be directly machined using ordinary tool holders, making angle heads an important supplementary tool. For example, Chinese patent document CN108098417A discloses a method for clamping and positioning an angle head using adjusting shims. This method mainly involves the coordinated control of the following components: machine tool spindle, adjusting shims, standard positioning block, positioning pin, angle head, adjusting shim screw, standard positioning block positioning pin, standard positioning block screw, and calibration strip. This method solves the problem of rapid positioning and clamping of the angle head with the machine tool, simplifies the adjusting shim structure, and facilitates standardized management of the angle head and standard positioning blocks.

[0003] However, angle heads are currently special tool holders. When the accuracy of the angle head does not meet machining requirements, current tool measuring instruments cannot detect the damage to the angle head's accuracy, posing a risk of tool failure during operation. When installing the angle head into the machine tool, a retaining ring is needed to secure it. Due to individual differences in the angle head's locating pins, interference between the locating pins and the retaining ring may occur after installation, causing tool position deviation on the angle head. Currently, there is no method to check for angle head position deviation, and no testing instruments are available on the market, posing a significant risk. Dimensional deviations are frequently caused by angle head problems or improper use; therefore, finding a method to verify angle heads has become an urgent issue. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this invention discloses an angle head verification tool and method. By detecting the error value, it can predict in advance whether the angle head can be used normally and the degree of impact on subsequent manufacturing accuracy, thus identifying usage risks in advance, ensuring product manufacturing accuracy, and reducing product failures.

[0005] This application achieves the above objectives through the following technical solution:

[0006] An angle head calibration tool, characterized in that it includes a base and a positioning adjustment mechanism;

[0007] The base has a quadrangular prism structure with a rectangular base; bolt adapter holes are provided through the interior of the base along its axis; two wedge-shaped lugs are symmetrically arranged at the bottom of the base along its axis.

[0008] The positioning adjustment mechanism includes a wedge nut and a bolt assembly; the wedge nut is located between two wedge lugs and engages with the two wedge lugs in a wedge shape; the bolt assembly passes through the bolt adapter hole from the top of the base and is threadedly connected to the wedge nut.

[0009] Preferably, it also includes a leveling unit, and the leveling unit includes a plurality of leveling components spaced apart on the side of the base; the leveling components include leveling lugs and leveling bolts, the leveling lugs are fixedly connected to the base, and the leveling bolts are provided with threaded holes parallel to the axis of the base, and the leveling bolts are movably connected to the leveling lugs through the threaded holes.

[0010] Preferably, the bottom surface of the leveling ear piece is on the same plane as the bottom surface of the substrate.

[0011] Preferably, the locking adjustment mechanism includes a bolt body and a washer; the bolt body includes an integrally formed nut and a screw, and the top of the nut has a multi-faceted groove.

[0012] Preferably, the bolt adapter hole includes a through hole for the screw to pass through, and the top of the through hole is provided with a cap groove for concealing the nut.

[0013] An angle head verification method, employing the aforementioned angle head verification tool, includes the following steps:

[0014] S1, Install the angle head calibration tool, including inserting the two wedge-shaped lugs of the angle head calibration tool into the wedge-shaped grooves of the machine tool worktable, and adjusting the positioning mechanism in conjunction with the two wedge-shaped lugs to fix the substrate to the machine tool worktable;

[0015] S2, Establish the datum, including selecting two intersecting sides of the base as datum plane K1 and datum plane K2 respectively, and establishing the workpiece coordinate system with the center point of the top surface of the base as the origin (x0, y0, z0);

[0016] S3, Install the angle head, including installing the angle head with the tool on the machine tool spindle and recording the tool installation parameters, including the tool radius R and the distance between the tool tip and the machine tool spindle L2;

[0017] S4, measuring the angle head error, includes controlling the machine tool spindle to move the tool closer to the base, and then, in the workpiece coordinate system, using the top surface of the base, datum surface K1, and datum surface K2 as measurement datums, combined with the tool installation parameters to obtain the angle head error.

[0018] Preferably, in step S2, establishing the benchmark also includes calibrating the flatness of the top surface of the substrate. That is, a leveling unit is set on the angle head calibration tool, and after the substrate is attached and fixed to the machine tool worktable, the leveling unit is used to level the substrate, and the flatness of the top surface of the substrate is calibrated with a dial indicator.

[0019] Preferably, in step S2, establishing the reference also includes using a dial indicator to align the reference plane K1, reference plane K2 and the origin (x0, y0, z0) before establishing the workpiece coordinate system.

[0020] Preferably, in step S3, the installation of the angle head further includes a positioning mechanism that, after installing the angle head on the machine tool spindle, straightens the angle head based on a dial indicator, and locks the angle head after straightening is completed.

[0021] Preferably, in step S4, measuring the angle head error includes the following steps:

[0022] S41, set the allowable distance range N between the tool and the base, and record the length of the line intersecting the reference plane K2 and the top surface of the base as b, and the length of the line intersecting the reference plane K1 and the top surface of the base as a;

[0023] S42, control the machine tool spindle to move, so that the tool arc surface gradually approaches the top surface of the base, until the vertical distance between the tool arc surface and the top surface of the base is within the allowable distance range N, then control the machine tool spindle to stop moving;

[0024] S43, record the coordinate values ​​(x1, y1, z1) of the tool tip in the workpiece coordinate system, and use a feeler gauge to measure the gap H1 between the tool arc surface and the top surface of the base;

[0025] S44, control the machine tool spindle to move, so that the tool arc surface gradually approaches the reference surface K1, until the perpendicular distance between the tool arc surface and the reference surface K1 is within the allowable distance range N, then control the machine tool spindle to stop moving;

[0026] S45, record the coordinate values ​​(x2, y2, z2) of the tool tip in the workpiece coordinate system, and use a feeler gauge to measure the gap H2 between the tool arc surface and the reference surface K1;

[0027] S46, control the machine tool spindle to move, so that the tool tip gradually approaches the reference surface K2, until the vertical distance between the tool tip and the reference surface K2 is within the allowable distance range N, then control the machine tool spindle to stop moving;

[0028] S47, record the coordinate values ​​(x3, y3, z3) of the tool tip in the workpiece coordinate system, and use a feeler gauge to measure the gap H3 between the tool tip and the reference surface K2;

[0029] S48, calculate the errors of the angle head along the X, Y, and Z axes of the workpiece coordinate system; that is, the X-axis error. Y-axis error Z-axis error D z = z0-(z1+R+H1).

[0030] Preferably, in step S41, the distance range N is 0.2 to 1.0 mm.

[0031] The beneficial technical effects of this invention are as follows:

[0032] This invention discloses an angle head calibration tool and calibration method. In practical use, before the angle head is installed, the calibration tool is used to check the machine tool position; after the angle head is installed, the calibration tool, combined with the calibration method, is used to check the position of the angle head after installation and debugging. Thus, when the angle head itself malfunctions or there are installation problems, this technical solution can detect the accuracy of the angle head before it is officially used in part processing, achieving the detection of errors in the angle head itself and installation errors, thereby reducing product failures. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the front structure of the angle head calibration tool;

[0034] Figure 2 This is a schematic diagram of the angle head calibration tool from below.

[0035] Figure 3 This is a side sectional view of the angle head calibration tool.

[0036] Figure 4 A schematic diagram showing the installation and use of the angle head calibration tool;

[0037] Figure 5 This is a schematic diagram showing the relative positional relationship between the cutting tool and the substrate when the tool is close to the top surface of the substrate.

[0038] Figure 6 This is a schematic diagram showing the relative positional relationship between the cutting tool and the substrate when the tool is close to the reference surface K1.

[0039] In the picture:

[0040] 1. Base; 1.1 Top surface; 1.2 Reference surface K1; 1.3 Reference surface K2; 1.4 Bottom surface; 2. Wedge lug; 3. Wedge nut; 4. Bolt assembly; 4.1 Screw; 4.2 Nut; 4.3 Multi-faceted groove; 4.4 Washer; 5. Bolt adapter hole; 5.1 Through-rod hole; 5.2 Nut groove; 6. Leveling assembly; 6.1 Leveling bolt; 6.2 Leveling lug; 7. Machine tool work platform; 7.1 Wedge groove; 8. Cutting tool; 9. Angle head. Detailed Implementation

[0041] To make the purpose, technical solution and advantages of the invention clearer, the technical solution of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the invention, but not all embodiments.

[0042] Therefore, the following detailed description of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0043] Example 1

[0044] This embodiment discloses an angle head 9 verification tool and verification method, as a preferred implementation of the present invention, such as... Figure 1 As shown, the calibration tool includes a base 1 and a positioning adjustment mechanism. The base 1 has a quadrangular prism structure with a rectangular base 1.4. Inside the base 1, a bolt adapter hole 5 is provided through its axis; at the bottom of the base 1, two wedge-shaped lugs 2 are symmetrically arranged along its axis. The positioning adjustment mechanism includes a wedge nut 3 and a bolt assembly 4; the wedge nut 3 is positioned between the two wedge-shaped lugs 2 and engages with them in a wedge-shaped fit; the bolt assembly 4 passes through the bolt adapter hole 5 from the top of the base 1 and is threadedly connected to the wedge nut 3.

[0045] Based on the structure of the above-mentioned verification tool, the verification method for angle head 9 includes the following steps:

[0046] S1, Install the angle head 9 calibration tool, including inserting the two wedge-shaped lugs 2 of the angle head 9 calibration tool into the wedge-shaped grooves 7.1 of the machine tool worktable, and adjusting the positioning mechanism in cooperation with the two wedge-shaped lugs 2 to fix the base 1 to the machine tool worktable, such as... Figure 4 As shown. The principle is as follows: by rotating the bolt assembly 4, the wedge nut 3 moves upward along the bolt assembly 4, gradually squeezing and tightening the two wedge lugs 2 outward. The two wedge lugs 2, which are squeezed and tightened, clamp the wedge groove 7.1 of the machine tool worktable, thus achieving the bonding and fixing of the base body 1 to the machine tool worktable.

[0047] S2, establish a datum, including selecting two intersecting side surfaces of the base 1 as datum surfaces K11.2 and K21.3 respectively, and establishing a workpiece coordinate system with the center point of the top surface 1.1 of the base 1 as the origin (x0, y0, z0).

[0048] S3, Install the angle head 9, including installing the angle head 9 with the tool 8 onto the machine tool spindle, and recording the tool 8 installation parameters, including the tool 8 radius R, and the distance L2 between the tool tip and the machine tool spindle (central axis), such as... Figure 5 As shown.

[0049] S4, measuring the angle head 9 error, including controlling the machine tool spindle to move the tool 8 close to the base 1, and then, in the workpiece coordinate system, using the top surface 1.1 of the base 1, the reference surface K11.2 and the reference surface K21.3 as the measurement reference, and combining the tool 8 installation parameters to obtain the angle head 9 error.

[0050] Therefore, if the measured error of the angle head 9 exceeds the allowable range, the use of the angle head 9 should be stopped immediately to avoid affecting the manufacturing accuracy of the product in subsequent processing.

[0051] Example 2

[0052] This embodiment discloses an angle head 9 calibration tool and calibration method. As a preferred embodiment of the present invention, based on embodiment 1, it further includes a leveling unit, and the leveling unit includes a plurality of leveling components 6 spaced apart on the side of the base 1. The leveling component 6 includes a leveling lug 6.2 and a leveling bolt 6.1. The leveling lug 6.2 is fixedly connected to the base 1, and the leveling bolt 6.1 has a threaded hole parallel to the axis of the base 1. The leveling bolt 6.1 is movably connected to the leveling lug 6.2 through the threaded hole.

[0053] Based on the above structure, the leveling principle of the calibration tool is as follows: by rotating the leveling bolt 6.1, the bottom of the leveling bolt 6.1 contacts the surface of the machine tool table, providing support, thereby adjusting the gap between the corresponding leveling lug 6.2 and the surface of the machine tool table. Furthermore, since the leveling lug 6.2 is integrated with the base 1, changing the gap between the leveling lug 6.2 and the surface of the machine tool table changes the local height of the base 1. Thus, multiple leveling components 6 work together to achieve multi-directional local height adjustment of the base 1, ensuring the flatness of the top surface 1.1 of the base 1.

[0054] Furthermore, the bottom surface 1.4 of the leveling lug 6.2 is on the same plane as the bottom surface 1.4 of the base 1, which facilitates observation of the gap change between the leveling lug 6.2 and the surface of the machine tool table, and is of great significance for high-precision adjustment of the flatness of the top surface 1.1 of the base 1.

[0055] Example 3

[0056] This embodiment discloses an angle head 9 calibration tool and calibration method. As a preferred embodiment of the present invention, based on embodiment 1 or 2, its locking adjustment mechanism includes a bolt body and a washer 4.4; the bolt body includes an integrally formed nut 4.2 and a screw 4.1, and the top of the nut 4.2 has a polygonal groove 4.3. The polygonal groove 4.3 is provided to facilitate the rotation of the bolt body with the help of external auxiliary tools.

[0057] Accordingly, the bolt adapter hole 5 includes a through hole 5.1 for the screw 4.1 to pass through, and a cap groove 5.2 is provided at the top of the through hole 5.1 to hide the nut 4.2. In this technical solution, based on the setting of the cap groove 5.2, the nut 4.2 is embedded into the base 1, which facilitates the origin positioning before establishing the workpiece coordinate system and also facilitates the determination of various references.

[0058] Example 4

[0059] This embodiment discloses an angle head 9 verification tool and verification method. As a preferred embodiment of the present invention, based on the verification tool in Embodiments 1, 2 or 3, to reduce subsequent errors, the angle head 9 verification method includes basic alignment and straightening operations, that is, the angle head 9 verification method includes the following steps:

[0060] S1, Install the angle head 9 calibration tool, including inserting the two wedge-shaped lugs 2 of the angle head 9 calibration tool into the wedge grooves 7.1 of the machine tool worktable, and adjusting the positioning mechanism in cooperation with the two wedge-shaped lugs 2 to fix the base body 1 to the machine tool worktable.

[0061] S2, establish a datum, including selecting two intersecting side surfaces of the base 1 as datum surfaces K11.2 and K21.3 respectively, and establishing a workpiece coordinate system with the center point of the top surface 1.1 of the base 1 as the origin (x0, y0, z0).

[0062] Furthermore, establishing the datum also includes calibrating the flatness of the top surface 1.1 of the base 1. That is, setting a leveling unit on the angle head 9 calibration tool, after the base 1 is attached and fixed to the machine tool worktable, the leveling unit is used to perform a leveling operation on the base 1, and the flatness of the top surface 1.1 of the base 1 is calibrated with a dial indicator, thereby ensuring that the subsequent Z-axis datum line / surface is within the controllable tolerance range.

[0063] Further steps in establishing a datum include using a dial indicator to align datum planes K11.2 and K21.3 and the origin (x0, y0, z0) before establishing the workpiece coordinate system, thereby ensuring that subsequent X / Y datum lines / planes are within controllable tolerances.

[0064] S3, Install the angle head 9, including installing the angle head 9 with the tool 8 on the machine tool spindle and recording the tool 8 installation parameters, including the tool 8 radius R and the distance between the tool tip and the machine tool spindle L2.

[0065] Furthermore, the installation of the angle head 9 also includes a positioning mechanism that, after installing the angle head 9 on the machine tool spindle, straightens the angle head 9 based on a dial indicator, and locks the angle head 9 after straightening is completed.

[0066] S4, measuring the angle head 9 error, including controlling the machine tool spindle to move the tool 8 close to the base 1, and then, in the workpiece coordinate system, using the top surface 1.1 of the base 1, the reference surface K11.2 and the reference surface K21.3 as the measurement reference, and combining the tool 8 installation parameters to obtain the angle head 9 error.

[0067] Example 5

[0068] This embodiment discloses an angle head 9 calibration tool and calibration method. As a preferred embodiment of the present invention, based on embodiments 1, 2, 3 or 4, step S4, measuring the angle head 9 error includes the following steps:

[0069] S41, set the allowable distance range N between the tool 8 and the base 1, and denote the length of the intersection line between the reference plane K21.3 and the top surface 1.1 of the base 1 as b, and the length of the intersection line between the reference plane K11.2 and the top surface 1.1 of the base 1 as a. Further, the distance range N is 0.2 to 1.0 mm.

[0070] S42, control the machine tool spindle to move, so that the arc surface of the tool 8 gradually approaches the top surface 1.1 of the base 1, until the vertical distance between the arc surface of the tool 8 and the top surface 1.1 of the base 1 is within the allowable distance range N, then control the machine tool spindle to stop moving.

[0071] S43, record the coordinate values ​​(x1, y1, z1) of the tool tip in the workpiece coordinate system, and use a feeler gauge to measure the gap H1 between the arc surface of the tool 8 and the top surface 1.1 of the base 1.

[0072] S44, control the machine tool spindle to move, so that the arc surface of the tool 8 gradually approaches the reference surface K11.2, until the vertical distance between the arc surface of the tool 8 and the reference surface K11.2 is within the allowable distance range N, then control the machine tool spindle to stop moving.

[0073] S45, record the coordinate values ​​(x2, y2, z2) of the tool tip in the workpiece coordinate system, and use a feeler gauge to measure the gap H2 between the arc surface of the tool 8 and the reference surface K11.2.

[0074] S46, control the machine tool spindle to move, so that the tip of the tool 8 gradually approaches the reference surface K21.3, until the vertical distance between the tip of the tool 8 and the reference surface K21.3 is within the allowable distance range N, then control the machine tool spindle to stop moving.

[0075] S47, record the coordinate values ​​(x3, y3, z3) of the tool tip in the workpiece coordinate system, and use a feeler gauge to measure the gap H3 between the tool tip and the reference surface K21.3.

[0076] S48, calculate the errors of the angle head 9 along the X, Y, and Z axes of the workpiece coordinate system; that is, the X-axis error. Y-axis error Z-axis error D z = z0-(z1+R+H1).

[0077] Therefore, the X-axis error D x Y-axis error D y and Z-axis error D z If the error in any direction exceeds the allowable range, the use of the angle head 9 should be stopped immediately to avoid affecting the manufacturing accuracy of the product in subsequent processing.

Claims

1. A method for verifying an angle head, characterized in that, An angle head calibration tool was adopted, which includes a base (1) and a positioning adjustment mechanism; The base (1) has a quadrangular prism structure and its bottom surface (1.4) is rectangular; the interior of the base (1) has a bolt adapter hole (5) through its axis; the bottom of the base (1) has two wedge-shaped lugs (2) symmetrically arranged along its axis. The positioning adjustment mechanism includes a wedge nut (3) and a bolt assembly (4); the wedge nut (3) is located between two wedge lugs (2) and wedges with the two wedge lugs (2); the bolt assembly (4) passes through the bolt adapter hole (5) from the top of the base (1) and is threaded to the wedge nut (3); The process includes the following steps: S1, Install the angle head (9) calibration tool, including inserting the two wedge-shaped lugs (2) of the angle head (9) calibration tool into the wedge groove (7.1) of the machine tool worktable, and adjusting the positioning mechanism in conjunction with the two wedge-shaped lugs (2) to fix the base (1) to the machine tool worktable; S2, Establishing a baseline, including: Two intersecting side surfaces of the base (1) are selected as reference planes. (1.2) and reference surface (1.3) Use a dial indicator to calibrate the reference surface. (1.2) Reference Surface (1.3) and the origin Perform the alignment; The flatness of the top surface (1.1) of the substrate (1) is checked by setting a leveling unit on the angle head (9) calibration tool, attaching and fixing the substrate (1) to the machine tool workbench, and then using the leveling unit to level the substrate (1) and using a dial indicator to check the flatness of the top surface (1.1) of the substrate (1); Taking the center point of the top surface (1.1) of the substrate (1) as the origin Establish the workpiece coordinate system; S3, Install the angle head (9), including installing the angle head (9) with the tool (8) on the machine tool spindle and recording the tool (8) installation parameters, including the tool (8) radius. Distance between the tool tip and the machine tool spindle ; S4, measure the angle head (9) error, including controlling the machine tool spindle to move the tool (8) closer to the base (1), and then in the workpiece coordinate system, with the top surface (1.1) of the base (1) and the reference surface... (1.2) and reference surface (1.3) is used as the measurement reference, and the angle head (9) error is obtained by combining the tool (8) installation parameters; wherein, the measurement of the angle head (9) error includes the following steps: S41, Set the allowable distance range between the tool (8) and the base (1). Record the reference plane (1.3) The length of the line intersecting the top surface (1.1) of the substrate (1) is datum plane (1.2) The length of the line intersecting the top surface (1.1) of the substrate (1) is ; S42, control the machine tool spindle to move, so that the arc surface of the tool (8) gradually approaches the top surface (1.1) of the base (1) until the vertical distance between the arc surface of the tool (8) and the top surface (1.1) of the base (1) is within the allowable distance range. Inside, the machine tool spindle is stopped from moving; S43, record the coordinates of the tool tip (8) in the workpiece coordinate system. The gap between the arc surface of the cutting tool (8) and the top surface (1.1) of the base (1) was measured with a feeler gauge. ; S44, control the movement of the machine tool spindle so that the arc surface of the tool (8) gradually approaches the reference surface. (1.2), until the arc surface of the tool (8) is aligned with the reference surface. The vertical distance of (1.2) is within the allowable distance range. Inside, the machine tool spindle is stopped from moving; S45, record the coordinates of the tool tip (8) in the workpiece coordinate system. And use a feeler gauge to measure the arc surface of the cutting tool (8) and the reference surface. The gap between (1.2) ; S46, control the machine tool spindle to move, so that the tip of the tool (8) gradually approaches the reference surface. (1.3), until the tip of the tool (8) is aligned with the reference surface. The vertical distance of (1.3) is within the allowable distance range. Inside, the machine tool spindle is stopped from moving; S47, record the coordinates of the tool tip (8) in the workpiece coordinate system. And use a feeler gauge to measure the distance between the tip of the cutting tool (8) and the reference surface. The gap between (1.3) ; S48, calculate the errors of the angle head (9) along the X-axis, Y-axis, and Z-axis of the workpiece coordinate system; that is, the X-axis error. Y-axis error Z-axis error .

2. The angle head verification method as described in claim 1, characterized in that, In step S2, the leveling unit includes several leveling components (6) spaced apart on the side of the base (1); the leveling component (6) includes leveling lugs (6.2) and leveling bolts (6.1). The leveling lugs (6.2) are fixedly connected to the base (1), and the leveling bolts (6.1) have threaded holes parallel to the axis of the base (1). The leveling bolts (6.1) are movably connected to the leveling lugs (6.2) through the threaded holes.

3. The angle head verification method as described in claim 2, characterized in that: The bottom surface (1.4) of the leveling ear piece (6.2) of the calibration tool is on the same plane as the bottom surface (1.4) of the substrate (1).

4. The angle head verification method as described in claim 1, characterized in that: The positioning adjustment mechanism of the calibration tool includes a bolt body and a washer (4.4); the bolt body includes an integrally formed nut (4.2) and a screw (4.1), and the top of the nut (4.2) has a multi-faceted groove (4.3).

5. The angle head verification method as described in claim 1, characterized in that: The bolt adapter hole (5) of the calibration tool includes a through hole (5.1) for the screw (4.1) to pass through, and a cap groove (5.2) for hiding the nut (4.2) is provided at the top of the through hole (5.1).

6. The angle head verification method as described in claim 1, characterized in that, In step S3, the installation of the angle head (9) also includes a positioning mechanism that, after installing the angle head (9) on the machine tool spindle, straightens the angle head (9) based on a dial indicator and locks the angle head (9) after straightening is completed.

7. The angle head verification method as described in claim 1, characterized in that, In step S41, the distance range The value ranges from 0.2 to 1.0 mm.

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