A surveying and mapping tool for a numerically controlled angle milling head positioning block and a method of using the same

Abstract

The present invention belongs to the technical field of numerical control machining, and relates to a surveying and mapping tool and a method for using a positioning block of a numerical control angle milling head. The tool is suitable for accurately mapping the spindle structure of a numerical control machine tool before the angle milling head is installed on the numerical control machine tool, so as to obtain the relevant dimensions necessary for the design and manufacture of the positioning block of the angle milling head. The present invention is connected to the machine tool spindle by a taper handle matched with the machine tool spindle, so that the reference axis of the surveying and mapping tool coincides with the axis of the machine tool spindle. The surveying and mapping tool is marked with a dimension scale, and the design of the dimension scale is based on the reference axis of the surveying and mapping tool as the design and manufacturing reference. By adjusting the functional accessories such as rotation, sliding, and lifting on the surveying and mapping tool, the measuring head reaches the required measuring position, and according to the dimension scale on the surveying and mapping tool, the required spatial dimensions such as angle, height, and rotation radius can be quickly and accurately read.

Description

Technical Field

[0001] The present invention belongs to the technical field of numerical control machining, and relates to a surveying and mapping tool and a method for using a numerical control angle milling head positioning block. The present invention is suitable for accurately surveying and mapping the spindle structure of a numerical control machine tool before the angle milling head is installed on the numerical control machine tool, so as to obtain the relevant dimensions required for the design and manufacture of the angle milling head positioning block. Background Art

[0002] With the continuous development of CNC machining technology, and the increasingly complex design of parts structure and mold structure, conventional machining methods are difficult to achieve. At the same time, in order to improve machining efficiency and reduce machining costs, the machining process of a large number of products has gradually changed from multi-station to few-station; five-axis equipment machining has changed to three-axis equipment machining. As a result, CNC angle milling heads have begun to be widely used.

[0003] Before installing the CNC angle milling head, you need to install a positioning block at the required position on the CNC machine tool spindle end face to accurately define the installation position and direction of the angle milling head. However, when installing the positioning block, you need to use the threaded holes on the machine tool spindle end face and avoid factors such as the cooling pipes on the spindle end face, and it cannot affect the normal rotation of the spindle. The most important thing is that different equipment models and specifications, and different equipment manufacturers have different spindle designs, resulting in different spindle end face structural dimensions, which ultimately leads to the positioning block of the angle milling head cannot be used universally on different equipment. The relevant dimensions of the spindle end face of each device must be measured on-site and the positioning block must be customized.

[0004] In the past, when measuring the dimensions of the spindle end face of the equipment, ordinary general measuring tools such as calipers and tape measures were used. Because of the obstruction of machine tool accessories such as the cooling water pipe on the spindle end face of the equipment, and the influence of the spatial dimensions required for the design of the angle milling head positioning block, most of the dimensions are based on the spindle rotation center. Therefore, the relevant dimensional errors of the field survey are large, and it is impossible to achieve a qualified design and processing in one time. Repeated corrections are required, which seriously affects the efficiency and positioning accuracy of the angle milling head. Therefore, it is necessary to study a surveying tool and a method for using the CNC angle milling head positioning block. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a measuring instrument and a method of using the measuring instrument that can directly measure the required spatial dimensions. The measuring instrument is connected to the machine tool spindle through the taper handle matched with the machine tool spindle, so that the reference axis of the surveying tool coincides with the axis of the machine tool spindle. The surveying tool is marked with a size scale, and the design of the size scale is based on the reference axis of the surveying tool as the design and manufacturing basis. By adjusting the functional accessories such as rotation, sliding, and lifting on the surveying tool, the measuring head reaches the required measurement position, and according to the size scale on the surveying tool, the required spatial dimensions such as angle, height, and rotation radius can be quickly and accurately read.

[0006] The technical solution of the present invention is as follows:

[0007] A surveying and mapping tool for a numerically controlled angle milling head positioning block comprises: a machine tool spindle connecting handle 1, a core shaft 2, an angle dial 3, an angle dial locking screw 4, a measuring arm turntable 5, a measuring arm 7, a height gauge telescopic sleeve 8, a height gauge 9, a threaded rod 10, a measuring head 11, a spring 12, a height gauge adjusting nut 13, a transverse cursor 14, a fixing ring 16 and a fixing ring locking screw 17.

[0008] The top end of the machine tool spindle connecting handle 1 cooperates with the machine tool spindle cone, and the top end is provided with a rivet connecting hole 18, which is connected with the rivet matched with the machine tool, and the other end is an integral structure with the core shaft 2.

[0009] The angle dial 3 is threaded on the core shaft 2 by means of an axial hole connection, and can freely rotate around the core shaft 2. The angle dial 3 is engraved with angle lines of ±180°; a threaded hole is provided on the angle dial 3. After the angle dial 3 is rotated to a desired angle, the angle dial locking screw 4 is screwed into the threaded hole and supported on the core shaft 2, thereby locking and fixing the angle dial 3.

[0010] The measuring arm turntable 5 and the measuring arm 7 are an integrated structure, which are mounted on the core shaft 2 through the center hole on the measuring arm turntable 5, so that it can rotate around the core shaft 2, thereby measuring the rotation angle; a measuring arm turntable 0 degree line 6 is provided on the measuring arm turntable 5, and the rotation angle is determined by comparing the scale lines on the angle dial 3, which serves as a reference line when reading the angle size; the bottom of the measuring arm turntable 5 is further limited on the core shaft 2 by a fixing ring 16 and a fixing ring locking screw 17 to prevent it from falling off.

[0011] The telescopic sleeve 8 of the height gauge and the transverse cursor 14 are an integrated structure, and the telescopic sleeve 8 of the height gauge is arranged vertically; a horizontal slide groove 15 is provided on the measuring arm 7, and the transverse cursor 14 is installed in the slide groove 15, and the transverse cursor 14 drives the telescopic sleeve 8 of the height gauge to slide left and right on the measuring arm 7; dimension lines are engraved on the side of the measuring arm 7, and the dimension lines are designed based on the central reference axis of the machine tool spindle, and are the main scale part for measuring the rotation radius; dimension lines are engraved on the side of the transverse cursor 14, which is the secondary scale part for measuring the rotation radius, and the 0 line of the secondary scale coincides with the axis of the telescopic sleeve 8 of the height gauge; the telescopic sleeve 8 of the sliding height gauge and the transverse cursor 14 are read by the scales on the measuring arm 7 and the transverse cursor 14 to measure the required dimensional data.

[0012] The height gauge 9, the threaded rod 10 and the measuring head 11 are an integrated structure, forming a height measuring component, which is installed in the telescopic sleeve 8 of the height gauge. A shoulder is provided at the connection position between the height gauge 9 and the threaded rod 10. The measuring head 11 is located above the top of the telescopic sleeve 8 of the height gauge. The bottom of the threaded rod 10 is located below the bottom end of the telescopic sleeve 8 of the height gauge and below the measuring arm 7. The bottom of the threaded rod 10 cooperates with the height gauge adjustment nut 13 for locking; the spring 12 is installed in the telescopic sleeve 8 of the height gauge, one end of which is supported on the shoulder below the height gauge 9, and the other end of which is supported on the upper surface of the transverse cursor 14. The height gauge 9 and the measuring head 11 are pushed upward by the action of the spring 12; when the telescopic sleeve 8 of the height gauge and the transverse cursor 14 are moved, the height measuring component moves together, and the measuring head 11 is delivered to the target position; the height gauge 9 is engraved with size scale lines, and when the 0 line coincides with the upper surface of the telescopic sleeve 8 of the height gauge, the upper end face of the measuring head 11 coincides with the height of the rotating end face of the machine tool spindle.

[0013] The beneficial effects of the present invention are as follows: the use of the above-mentioned CNC angle milling head positioning block surveying and mapping tool and the method of use can effectively and accurately measure the relevant dimensional parameters required for the customized positioning block, solving the problem that the conventional measuring tools cannot achieve accurate surveying and mapping of spatial dimensions. The design of this surveying and mapping tool is relatively intuitive, and the method of use is simple and easy to learn and use. It effectively solves the processing problem of repeated correction of the positioning block due to large surveying and mapping errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 (a) and Figure 1 (b) are schematic diagrams of the measurement dimensions required for the design of the positioning block of the CNC angle milling head;

[0015] Among them: A is the inner rotation radius of the positioning block; B is the outer rotation radius of the positioning block; C is the center rotation radius of the threaded hole; D is the angular spacing of the threaded holes; E is the height difference between the end face of the spindle rotating cone and the end face of the machine tool spindle; F is the spindle rotating cone; G is the end face of the machine tool spindle; H is the angle milling head positioning block.

[0016] Fig. 2(a) and Fig. 2(b) are respectively a cross-sectional view and a top view of a surveying tool of a positioning block of a CNC angle milling head; Fig. 2(c) is a schematic diagram of a height measurement component;

[0017] Among them: 1 machine tool spindle connecting handle; 2 spindle; 3 angle dial; 4 angle dial locking screw; 5 measuring arm turntable; 6 measuring arm turntable 0 degree line; 7 measuring arm; 8 height gauge telescopic sleeve; 9 height gauge; 10 threaded rod; 11 measuring head; 12 spring; 13 height gauge adjustment nut; 14 horizontal cursor; 15 slide groove; 16 fixing ring; 17 fixing ring locking screw; 18 rivet connecting hole. DETAILED DESCRIPTION

[0018] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0019] like Figure 2(a) to Figure 2(c) As shown, a surveying and mapping tool for a CNC angle milling head positioning block includes: a machine tool spindle connecting handle 1, a core shaft 2, an angle dial 3, an angle dial locking screw 4, a measuring arm turntable 5, a measuring arm 7, a height gauge telescopic sleeve 8, a height gauge 9, a threaded rod 10, a measuring head 11, a spring 12, a height gauge adjustment nut 13, a transverse cursor 14, a fixing ring 16 and a fixing ring locking screw 17.

[0020] The machine tool spindle connecting handle 1 is the only interface for connecting this device with the machine tool spindle, and the taper handle specification must be consistent with the taper hole specification of the machine tool spindle. Its main function is to connect with the machine tool spindle and enable the central reference axis of this device to accurately coincide with the axis of the machine tool spindle.

[0021] The mandrel 2 is designed as an integral unit with the main shaft connecting handle 1 and has a high coaxial accuracy. It has three main functions: first, it provides a mounting carrier for other components; second, it supports the measuring arm turntable 5, the measuring arm 7 and the angle scale 3 to rotate along their axis; and third, it is convenient for the operator to take and install the device.

[0022] The angle dial 3 is connected to the core shaft 2 by means of an axial hole, and can rotate freely around the core shaft 2. In addition, angle scale lines of ±180° are engraved on the angle dial 3 to facilitate the operator to adjust the scale line position and to facilitate the reading and calculation of the angle size.

[0023] The angle dial locking screw 4 is screwed into the threaded hole on the angle dial 3 and supported on the core shaft 2. Its function is to lock and fix the angle dial 3 after it is rotated to a desired angle.

[0024] The measuring arm turntable 5 and the measuring arm 7 are designed and manufactured as one body, and are also mounted on the core shaft 2 through the center hole on the measuring arm turntable, so that it can rotate around the core shaft 2, thereby measuring the rotation angle.

[0025] The measuring arm rotating disk 0 degree line 6 is engraved on the measuring arm rotating disk 5, and its function is to determine the rotation angle by comparing the scale lines on the angle scale disk 3, that is, the reference line when reading the angle size.

[0026] The telescopic sleeve 8 and the transverse cursor 14 of the height gauge are designed and manufactured as one body, and can slide freely on the measuring arm 7. The measuring arm 7 has dimension lines engraved on its side. The dimension lines are designed and manufactured based on the central reference axis of the device, and are the main scale part for measuring the rotation radius. The side of the transverse cursor 14 also has dimension lines engraved on it, and is the secondary scale part for measuring the rotation radius. The 0 line of the secondary scale coincides with the axis of the telescopic sleeve 8 of the height gauge. The main function is to measure the required dimension data by sliding the telescopic sleeve 8 and the transverse cursor 14 and reading the scales on the measuring arm 7 and the transverse cursor 14.

[0027] The height gauge 9, threaded rod 10 and measuring head 11 are designed as an integrated unit to form a height measuring component, which is installed in the telescopic sleeve 8 of the height gauge. The main purpose is to move the height gauge 9, threaded rod 10 and measuring head 11 together when the telescopic sleeve 8 and the horizontal cursor 14 of the height gauge are moved, so that the measuring head 11 can be delivered to the target position. In addition, the height gauge 9 is also engraved with dimension lines. When the 0 line coincides with the upper surface of the telescopic sleeve 8 of the height gauge, the upper end face of the measuring head 11 coincides with the rotating end face of the machine tool spindle. The main purpose of this design is to meet the E dimension measurement in Figure 1 (b).

[0028] The spring 12 is installed in the telescopic sleeve 8 of the height gauge, with one end supported below the height gauge 9 and the other end supported above the transverse cursor 14. The main function is to push the height gauge 9 and the measuring head 11 upward through the force of the spring.

[0029] The height gauge adjustment nut 13 is installed under the measuring arm 7, and is threadedly matched with the threaded rod 10 that passes through the transverse cursor 14 and the slide slot 15 on the measuring arm 7. The main function is to screw the height gauge adjustment nut 13, and at the same time, under the supporting force of the spring 12, the height gauge 9 and the measuring head 11 move up and down.

[0030] The fixing ring 16 is a fixing part for all parts. The fixing ring locking screw 17 is fastened to the mandrel 2 through the threaded hole on the fixing ring 16. Its main function is to prevent all parts on the mandrel 2 from falling off and play a fixing role.

[0031] The rivet connection hole 18 is an internal threaded hole, and its main function is to connect with the rivet matched with the machine tool.

[0032] A method for using a surveying and mapping tool for a CNC angle milling head positioning block, the specific steps are as follows:

[0033] 1) Check the reliability of the device and use a wrench to tighten the fixing ring locking screw 17 on the fixing ring 16 to prevent it from loosening and causing the parts to fall off.

[0034] 2) Screw the rivet matched with the machine tool into the rivet connection hole 18 and tighten it.

[0035] 3) Install the surveying and mapping tool as a whole onto the machine tool spindle: install the spindle connecting handle 1 into the machine tool spindle cone.

[0036] 4) Measurement of the dimensional radius of rotation A of the inner side of the positioning block in Figure 1(a):

[0037] 4.1) Move the lateral cursor 14 laterally, and at this time, move the height gauge 9, the threaded rod 10, the measuring head 11 and the height gauge adjustment nut 13 together on the measuring arm 7; send the measuring head 11 to the outside of the rotating cone F of the machine tool spindle.

[0038] 4.2) Rotate the height gauge adjustment nut 13 to adjust the height position of the measuring head 11 to ensure that the outer edge of the measuring head 11 is in contact with the outer side wall of the rotating cone F of the machine tool spindle.

[0039] 4.3) Move the lateral cursor 14 laterally to make the outer edge of the measuring head 11 contact the outer side wall of the rotating cone of the machine tool spindle; combine the main scale scale on the measuring arm 7 and the secondary scale scale on the lateral cursor 14 to read the size value, which is the size of the inner side rotation radius A of the positioning block.

[0040] 5) Measurement of the dimensional radius B of the outer side of the positioning block in Figure 1(a):

[0041] 5.1) Move the lateral cursor 14 laterally, and at this time, move the height gauge 9, the threaded rod 10, the measuring head 11 and the height gauge adjustment nut 13 together on the measuring arm 7; send the measuring head 11 to the outside of the pre-selected screw hole on the end face of the machine tool spindle.

[0042] 5.2) Rotate the height gauge adjustment nut 13 to adjust the height position of the measuring head 11 to ensure that the top surface of the measuring head 11 is close to the end surface G of the machine tool spindle.

[0043] 5.3) Move the transverse cursor 14 laterally and move the measuring head 11 to a position about 15 mm outside the pre-selected screw hole on the end face G of the machine tool spindle; read the dimension value based on the main scale scale on the measuring arm 7 and the secondary scale scale on the transverse cursor 14, which is the dimension of the outer rotation radius B of the positioning block.

[0044] 6) Measurement of the size of the center turning radius C of the threaded hole and the size of the angular spacing D of the threaded holes in Figure 1(a):

[0045] 6.1) Move the lateral cursor 14 laterally, and at this time, move the height gauge 9, the threaded rod 10, the measuring head 11 and the height gauge adjustment nut 13 together on the measuring arm 7; send the measuring head 11 to the center position of a pre-selected screw hole on the end face G of the machine tool spindle.

[0046] 6.2) Rotate the height gauge adjustment nut 13 to adjust the height position of the measuring head 11 to ensure that the measuring head 11 enters the pre-selected screw hole on the end face G of the machine tool spindle.

[0047] 6.3) Move the transverse cursor 14 laterally to make the outer edge of the measuring head 11 contact the inner wall of the pre-selected screw hole on the end face G of the machine tool spindle; read the dimension value in combination with the main scale scale on the measuring arm 7 and the secondary scale scale on the transverse cursor 14.

[0048] 6.4) Subtract the difference between the radius of the pre-selected screw hole on the machine tool spindle end face G and the radius of the measuring head 11 from this value to obtain the center turning radius C of the threaded hole.

[0049] 6.5) Use a wrench to loosen the angle dial locking screw 4.

[0050] 6.6) Manually rotate the angle dial 3 and align the 0 scale line with the measuring arm turntable 0 degree line 6 on the measuring arm turntable 5.

[0051] 6.7) Use a wrench to tighten the angle dial locking screw 4.

[0052] 6.8) Rotate the height gauge adjustment nut 13 to lower the height of the measuring head 11 and ensure that the measuring head 11 is withdrawn from the pre-selected screw hole on the end face G of the machine tool spindle.

[0053] 6.9) Push the measuring arm 7, together with the measuring arm turntable 5, the height gauge 9, the threaded rod 10, the measuring head 11 and the height gauge adjustment nut 13, to rotate around the core shaft 2, and deliver the measuring head 11 to another pre-selected screw hole position on the end face G of the machine tool spindle.

[0054] 6.10) Rotate the height gauge adjustment nut 13 to place the measuring head 11 against the end face G of the machine tool spindle.

[0055] 6.11) Push the measuring arm 7 until the measuring head 11 automatically springs into the screw hole under the action of the spring 12.

[0056] 6.12) At this time, the scale value on the angle scale 3 that is aligned with the measuring arm turntable 0 degree line 6 on the measuring arm turntable 5 is the required threaded hole angle spacing D size.

[0057] 7) Dimensional measurement of the height difference E between the end face of the spindle rotating cone and the end face of the machine tool spindle in Figure 1(b):

[0058] 7.1) Rotate the height gauge adjustment nut 13 to lower the height of the measuring head 11 and ensure that the measuring head 11 is withdrawn from the pre-selected screw hole on the end face G of the machine tool spindle.

[0059] 7.2) Move the lateral cursor 14 laterally to move the measuring head 11 to a position without interference with the end face G of the machine tool spindle.

[0060] 7.3) Rotate the height gauge adjustment nut 13 to place the measuring head 11 against the end face G of the machine tool spindle.

[0061] 7.4) Read the scale on the height gauge 9, which is the required height difference E from the end face of the spindle rotating cone to the end face of the machine tool spindle.

Claims

1. A surveying and mapping tool for a CNC angle milling head positioning block, characterized in that: The surveying and mapping tool comprises: a machine tool spindle connecting handle (1), a spindle (2), an angle dial (3), an angle dial locking screw (4), a measuring arm turntable (5), a measuring arm (7), a height gauge telescopic sleeve (8), a height gauge (9), a threaded rod (10), a measuring head (11), a spring (12), a height gauge adjusting nut (13), a transverse cursor (14), a fixing ring (16) and a fixing ring locking screw (17); The machine tool spindle connecting handle (1) has a top end that matches with the machine tool spindle cone and is provided with a rivet connecting hole (18) that is connected with the rivet matched with the machine tool, and the other end is an integral structure with the core shaft (2); The angle scale (3) is connected to the core shaft (2) by means of an axial hole, and can freely rotate around the core shaft (2). The angle scale (3) is engraved with angle lines of ±180°. The angle scale (3) is provided with a threaded hole. After the angle scale (3) is rotated to a desired angle, the angle scale locking screw (4) is screwed into the threaded hole and supported on the core shaft (2), thereby locking and fixing the angle scale (3). The measuring arm turntable (5) and the measuring arm (7) are an integrated structure, and are mounted on the core shaft (2) through a central hole on the measuring arm turntable (5), so that the measuring arm turntable (5) can rotate around the core shaft (2), thereby measuring the rotation angle; a measuring arm turntable 0 degree line (6) is provided on the measuring arm turntable (5), and the rotation angle is determined by comparing the scale lines on the angle scale (3), which serves as a reference line when reading the angle size; The telescopic sleeve (8) of the height gauge and the transverse cursor (14) are an integrated structure, and the telescopic sleeve (8) of the height gauge is arranged vertically; a horizontal slide groove (15) is provided on the measuring arm (7), and the transverse cursor (14) is installed in the slide groove (15), and the transverse cursor (14) drives the telescopic sleeve (8) of the height gauge to slide left and right on the measuring arm (7); the side of the measuring arm (7) is engraved with dimension lines, and the dimension lines are designed based on the central reference axis of the machine tool spindle, and are the main scale part for measuring the rotation radius; the side of the transverse cursor (14) is engraved with dimension lines, and is the secondary scale part for measuring the rotation radius, and the 0 line of the secondary scale coincides with the axis of the telescopic sleeve (8) of the height gauge; the telescopic sleeve (8) of the height gauge and the transverse cursor (14) are slid, and the required dimension data is measured by reading the scales on the measuring arm (7) and the transverse cursor (14); The height gauge (9), the threaded rod (10) and the measuring head (11) are an integrated structure, forming a height measuring component, which is installed in the telescopic sleeve (8) of the height gauge. A shaft shoulder is provided at the connection position between the height gauge (9) and the threaded rod (10). The measuring head (11) is located above the top of the telescopic sleeve (8) of the height gauge. The bottom of the threaded rod (10) is located below the bottom of the telescopic sleeve (8) of the height gauge and below the measuring arm (7). The bottom of the threaded rod (10) cooperates with the height gauge adjustment nut (13) to be locked. The spring (12) is installed in the telescopic sleeve (8) of the height gauge. 8), one end of the height gauge (9) is supported on the lower shoulder of the height gauge (9), and the other end of the height gauge (9) is supported on the upper surface of the transverse cursor (14), and the height gauge (9) and the measuring head (11) are pushed upward by the action of the spring (12); when the height gauge telescopic sleeve (8) and the transverse cursor (14) are moved, the height measuring components move together to deliver the measuring head (11) to the target position; the height gauge (9) is engraved with dimension lines, and when the 0 line coincides with the upper surface of the height gauge telescopic sleeve (8), the upper end face of the measuring head (11) coincides with the rotating end face of the machine tool spindle.

2. A surveying and mapping tool for a CNC angle milling head positioning block according to claim 1, characterized in that: The bottom of the measuring arm turntable (5) is further positioned on the core shaft (2) by means of a fixing ring (16) and a fixing ring locking screw (17) to prevent the measuring arm turntable (5) from falling off.

3. The method for using the surveying and mapping tool of the CNC angle milling head positioning block according to claim 1 or 2, characterized in that: The specific steps are as follows: 1) Check the reliability of the device and use a wrench to tighten the fixing ring locking screw (17) on the fixing ring (16) to prevent it from loosening and causing the parts to fall off; 2) Screw the pull nail matched with the machine tool into the pull nail connection hole (18) and tighten it; 3) Install the surveying and mapping tool as a whole onto the machine tool spindle: install the machine tool spindle connecting handle (1) into the machine tool spindle cone; 4) Measurement of the inner rotation radius A of the positioning block: 4.1) Move the lateral cursor (14) laterally, and move the height gauge (9), the threaded rod (10), the measuring head (11) and the height gauge adjustment nut (13) together on the measuring arm (7); and deliver the measuring head (11) to the outside of the rotating cone (F) of the machine tool spindle; 4.2) Rotate the height gauge adjustment nut (13) to adjust the height position of the measuring head (11) to ensure that the outer edge of the measuring head (11) contacts the outer side wall of the machine tool spindle rotating cone (F); 4.3) Move the lateral cursor (14) laterally to make the outer edge of the measuring head (11) contact the outer wall of the rotating cone of the machine tool spindle; read the dimension value by combining the main scale scale on the measuring arm (7) and the secondary scale scale on the lateral cursor (14), which is the dimension of the inner side rotation radius A of the positioning block; 5) Measurement of the dimensional size of the outer rotation radius B of the positioning block: 5.1) Move the lateral cursor (14) laterally, and move the height gauge (9), the threaded rod (10), the measuring head (11) and the height gauge adjustment nut (13) together on the measuring arm (7); and deliver the measuring head (11) to the outside of the pre-selected screw hole on the end face of the machine tool spindle; 5.2) Rotate the height gauge adjustment nut (13) to adjust the height position of the measuring head (11) to ensure that the top surface of the measuring head (11) is close to the end surface (G) of the machine tool spindle; 5.3) Move the transverse cursor (14) laterally and move the measuring head (11) to the outside of the pre-selected screw hole on the end face (G) of the machine tool spindle; read the dimension value by combining the main scale scale on the measuring arm (7) and the secondary scale scale on the transverse cursor (14), which is the dimension of the outer rotation radius B of the positioning block; 6) Measurement of the size of the threaded hole center turning radius C and the threaded hole angle spacing D: 6.1) Move the lateral cursor (14) laterally, and move the height gauge (9), the threaded rod (10), the measuring head (11) and the height gauge adjustment nut (13) together on the measuring arm (7); and deliver the measuring head (11) to the center position of a pre-selected screw hole on the end face (G) of the machine tool spindle; 6.2) Rotate the height gauge adjustment nut (13) to adjust the height position of the measuring head (11) to ensure that the measuring head (11) enters the pre-selected screw hole on the end face (G) of the machine tool spindle; 6.3) Move the transverse cursor (14) laterally to bring the outer edge of the measuring head (11) into contact with the inner wall of the preselected screw hole on the end face (G) of the machine tool spindle; read the dimension value by combining the main scale scale on the measuring arm (7) and the secondary scale scale on the transverse cursor (14); 6.4) Subtract the difference between the radius of the pre-selected screw hole on the end face of the machine tool spindle (G) and the radius of the measuring head (11) from this value to obtain the center turning radius C of the threaded hole; 6.5) Use a wrench to loosen the angle dial locking screw (4); 6.6) Manually rotate the angle dial (3) to align the 0-degree line with the 0-degree line (6) on the measuring arm turntable (5); 6.7) Use a wrench to tighten the angle dial locking screw (4); 6.8) Rotate the height gauge adjustment nut (13) to lower the height of the measuring head (11) and ensure that the measuring head (11) is withdrawn from the pre-selected screw hole on the end face (G) of the machine tool spindle; 6.9), push the measuring arm (7), together with the measuring arm turntable (5), the height gauge (9), the threaded rod (10), the measuring head (11) and the height gauge adjustment nut (13), to rotate around the core shaft (2), and deliver the measuring head (11) to the preselected screw hole position of another machine tool spindle end face (G); 6.10) Rotate the height gauge adjustment nut (13) to place the measuring head (11) against the end face (G) of the machine tool spindle; 6.11) Push the measuring arm (7) until the measuring head (11) automatically springs into the screw hole under the action of the spring (12); 6.12) At this time, the scale value on the angle scale (3) aligned with the measuring arm turntable 0 degree line (6) on the measuring arm turntable (5) is the required threaded hole angle spacing D; 7) Dimensional measurement of the height difference E between the end face of the spindle rotating cone and the end face of the machine tool spindle: 7.1) Rotate the height gauge adjustment nut (13) to lower the height of the measuring head (11) and ensure that the measuring head (11) is withdrawn from the pre-selected screw hole on the end face (G) of the machine tool spindle; 7.2) Move the lateral cursor (14) laterally to move the measuring head (11) to a position without interference with the end face (G) of the machine tool spindle; 7.3) Rotate the height gauge adjustment nut (13) to place the measuring head (11) against the end face (G) of the machine tool spindle; 7.4) Read the scale on the height gauge (9), which is the required height difference E between the end face of the spindle rotating cone and the end face of the machine tool spindle.

Images