Method for adjusting mounting precision of main shaft grinding head of numerical control tool grinding machine

Abstract

The invention discloses a numerical control tool grinding machine spindle grinding head mounting precision adjusting method, which is characterized in that when a spindle grinding head is mounted, the axis of the spindle grinding head often deviates from the axis of a rotary table and the perpendicularity of the axis of the spindle grinding head and the axis of the rotary table is out of tolerance due to the influence of part machining and assembly precision; at the moment, the deviation distance and perpendicularity can be adjusted by adjusting a jackscrew installed on the connecting disc. The method comprises an adjusting method for the deviation distance between the connecting disc connected between the rotating table and the main shaft grinding head and the axis of the rotating table and an adjusting method for the perpendicularity between the axis of the main shaft grinding head and the axis of the rotating table. According to the method, the mounting precision of the main shaft grinding head can be conveniently and quickly adjusted, the machining and assembling requirements of spare and accessory parts are greatly reduced, and the mounting precision problem of the main shaft grinding head is well solved.

Description

Technical Field

[0001] The invention relates to a method for adjusting the installation precision of a main shaft grinding head of a numerical control tool grinder, and belongs to the technical field of machining. Background Art

[0002] The spindle grinding head is one of the most important structures of the five-axis CNC tool grinder. Its common installation method is to directly install the spindle grinding head on the rotary table of the machine tool column slide. This method is not only simple in structure, but also easy to install, but has high requirements for installation accuracy. It is usually required that the distance between the spindle grinding head axis and the rotary table axis is not more than 0.03mm and the verticality between the spindle grinding head axis and the rotary table axis is within 0.005mm, otherwise it will have a great impact on the accuracy of the entire machine tool. However, it is difficult for the existing processing equipment and means to meet the installation accuracy requirements in one processing. Therefore, how to improve the reliability and accuracy of the spindle grinding head installation has become a technical problem to be solved urgently. The present invention designs an adjustable connecting plate and an adjustment method for connecting the rotary table and the spindle grinding head. The design and method can not only adjust the installation accuracy of the spindle grinding head conveniently and quickly, but also greatly reduce the requirements for spare parts processing and assembly, and well solve the accuracy problem of the spindle grinding head installation. Summary of the invention

[0003] The purpose of the present invention is to provide a method for adjusting the installation precision of a spindle grinding head of a CNC tool grinder. The method can not only adjust the installation precision of the spindle grinding head conveniently and quickly, but also greatly reduce the requirements for processing and assembling parts, and well solve the problem of the installation precision of the spindle grinding head.

[0004] The technical solution of the present invention is a method for adjusting the installation accuracy of a spindle grinding head of a CNC tool grinder, including a connecting plate connecting a rotary table and a spindle grinding head, a method for adjusting the deviation distance between the axis of the spindle grinding head and the axis of the rotary table, and a method for adjusting the perpendicularity between the axis of the spindle grinding head and the axis of the rotary table.

[0005] In the aforementioned method for adjusting the installation accuracy of the spindle grinding head of a CNC tool grinder, the connecting plate connected to one end of the spindle grinding head is evenly distributed with a first top screw mounting hole, a first top screw mounting hole and a third top screw mounting hole, a second top screw and a third top screw at an interval of 120°; the connecting plate connected to one end of the spindle grinding head is mirror-symmetrically provided with a fourth top screw mounting hole and a fifth top screw mounting hole, and these two top screw mounting holes are used to install the fourth top screw and the fifth top screw; the connecting plate connected to one end of the rotary table is provided with a countersunk hole for installing the rotary table connecting screws, and the connecting plate connected to the spindle grinding head is provided with a threaded hole for fixing the spindle grinding head mounting screws.

[0006] In the aforementioned method for adjusting the installation accuracy of the spindle grinding head of a CNC tool grinder, when the axis of the spindle grinding head often deviates from the axis of the rotary table and the perpendicularity between the axis of the spindle grinding head and the axis of the rotary table exceeds the tolerance, the deviation distance and the perpendicularity can be adjusted by adjusting the top screw installed on the connecting plate. The specific adjustment steps and methods are as follows:

[0007] First, assume that the X, Y, and Z axes of the machine tool are defined according to the coordinate system, the angle between the projection of the spindle grinding head axis on the XOY plane and the Y axis is β, and the angle between the projection of the spindle grinding head axis on the YOZ plane and the Y axis is γ;

[0008] (1) Adjust the spindle grinding head axis to be parallel to the YOZ plane:

[0009] ① Rotate the rotary table until the axis of the spindle grinding head is visually parallel to the YOZ plane;

[0010] ② Move the X-axis of the machine tool to point A of the spindle grinding head and record the X-axis coordinate of the machine tool as x1;

[0011] ③ Move the Y axis of the machine tool to the rotation center O position, and record the distance moved by the Y axis as d;

[0012] ④Continue to move the same distance d along the negative direction of the Y axis;

[0013] ⑤ Move the X-axis of the machine tool to the A′ position of the spindle grinding head and record the X-axis coordinate of the machine tool as x2;

[0014] ⑥ Calculate the projection of the spindle grinding head axis AA′ on the XOY plane and the Y-axis inclination If x1>x2, adjust the rotary table counterclockwise to rotate β angle, otherwise adjust it clockwise. At this time, the spindle grinding head axis is adjusted from AA′ to A1A1′, and A1A1′ is set as the origin position of the rotary table, that is, the 0° position;

[0015] (2) Adjust the verticality between the axis of the spindle grinding head and the axis of the rotary table:

[0016] ① Move the Z axis of the machine tool to the 0° spindle grinding head A1 point position, and record the Z axis coordinate of the machine tool as z1;

[0017] ②Rotate the rotary table 180° clockwise;

[0018] ③ Move the machine tool Z axis to the -180° spindle grinding head A1′ point position, and record the machine tool Z axis coordinate as z2;

[0019] ④ Move the Y axis of the machine tool to the rotation center O position, and record the distance moved by the Y axis as d;

[0020] ⑤ Calculate the inclination angle between the projection of the spindle grinding head axis AA′ on the YOZ plane and the Y axis If z2>z1, the spindle grinding head leans toward the negative side of the Z axis, then tighten the fourth top screw and loosen the fifth top screw. Otherwise, tighten the fifth top screw and loosen the fourth top screw.

[0021] ⑥ Repeat the above steps until the verticality between the spindle grinding head axis and the rotary table axis reaches the required accuracy range;

[0022] (3) Adjustment of the deviation distance between the spindle grinding head axis and the rotary table axis:

[0023] ① Move the X-axis of the machine tool to the 0° spindle grinding head A2 point position, and record the X-axis coordinate of the machine tool as x1;

[0024] ②Rotate the rotary table 180° clockwise;

[0025] ③ Move the X-axis of the machine tool to the same A2 position as the spindle grinding head at -180°, and record the X-axis coordinate of the machine tool as x2;

[0026] ④ Calculate the deviation distance between the spindle grinding head axis and the rotary table axis If x1>x2, the axis of the spindle grinding head deviates to the positive direction of the X-axis, then tighten the first top screw and loosen the second and third top screws. Otherwise, tighten the second and third top screws and loosen the first top screw.

[0027] ⑤ Repeat the above steps until the distance that the spindle grinding head axis deviates from the rotary table axis reaches the required accuracy range.

[0028] Beneficial effects of the invention: Compared with the prior art, the present invention adopts the above-mentioned technical scheme. The first step is to adjust the spindle grinding head axis to be parallel to the YOZ plane, the second step is to adjust the verticality of the spindle grinding head axis and the rotary table axis, and finally the deviation distance between the spindle grinding head axis and the rotary table axis is adjusted. This method can not only conveniently and quickly adjust the installation accuracy of the spindle grinding head, but also greatly reduce the requirements for spare parts processing and assembly, and well solve the problem of spindle grinding head installation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a view of the installation of the spindle grinding head of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of the connection disk of the present invention;

[0031] Figure 3 It is a schematic diagram of the parallel adjustment between the axis of the spindle grinding head and the YOZ plane of the present invention;

[0032] Figure 4 A schematic diagram of the vertical adjustment between the axis of the main spindle grinding head and the axis of the rotary table is provided;

[0033] Figure 5The invention is a schematic diagram of adjusting the deviation distance between the spindle grinding head axis and the rotary table axis.

[0034] Figure markings: 1-rotating worktable; 2-connecting plate; 3-spindle grinding head; 2-1-first top screw, 2-2-second top screw, 2-3-third top screw, 2-4-fourth top screw, 2-5-fifth top screw, 201-1-first top screw mounting hole, 201-2-second top screw mounting hole, 201-3-third top screw mounting hole, 201-4-fourth top screw mounting hole, 201-5-fifth top screw mounting hole, 202-countersunk hole, 203-threaded hole. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0036] An embodiment of the present invention: A method for adjusting the installation accuracy of a spindle grinding head of a CNC tool grinder, including a method for adjusting a connecting plate 2 connected between a rotary table 1 and a spindle grinding head 3, a method for adjusting the deviation distance between the axis of the spindle grinding head and the axis of the rotary table, and a method for adjusting the perpendicularity between the axis of the spindle grinding head and the axis of the rotary table.

[0037] The structure of the connecting plate 2, the connecting rotary table 1 and the spindle grinding head 3 is as follows:

[0038] The connecting plate 2 is connected to one end of the spindle grinding head 3 and is evenly distributed with a first top screw mounting hole 201-1, a first top screw mounting hole 201-2 and a third top screw mounting hole 201-3 at an interval of 120°. The three top screw mounting holes are respectively corresponding to the installation of the first top screw 2-1, the second top screw 2-2 and the third top screw 2-3. The first top screw 2-1, the second top screw 2-2 and the third top screw 2-3 are used to adjust the deviation distance between the axis of the spindle grinding head and the axis of the rotary worktable.

[0039] The fourth top screw mounting hole 201-4 and the fifth top screw mounting hole 201-5 are mirror-symmetrically arranged at one end of the connecting plate 2 connected to the spindle grinding head 3. These two top screw mounting holes are used to install the fourth top screw 2-4 and the fifth top screw 2-5. The fourth top screw 2-4 and the fifth top screw 2-5 are used to adjust the verticality of the spindle grinding head axis and the rotary table axis.

[0040] A countersunk hole 202 is provided at one end of the connecting plate 2 connected to the rotary table 1, and the countersunk hole 202 is used to install the rotary table connecting screws. A threaded hole 203 is provided at one end of the connecting plate 2 connected to the spindle grinding head 3, and the threaded hole 203 is used to fix the spindle grinding head mounting screws.

[0041] When the spindle grinding head is installed, due to the influence of the machining and assembly accuracy of the parts, the axis of the spindle grinding head 3 often deviates from the axis of the rotary table 1 and the verticality of the axis of the spindle grinding head and the axis of the rotary table 1 is out of tolerance. At this time, the deviation distance and verticality can be adjusted by adjusting the top screw installed on the connecting plate 2. The specific adjustment steps and methods are as follows:

[0042] First, assume that the X, Y, and Z axes of the machine tool are defined according to the coordinate system of the schematic diagram, the angle between the projection of the spindle grinding head axis on the XOY plane and the Y axis is β, and the angle between the projection of the spindle grinding head axis on the YOZ plane and the Y axis is γ;

[0043] (1) Adjust the spindle grinding head axis to be parallel to the YOZ plane (such as Figure 3 shown):

[0044] ① Rotate the rotary table 1 until the axis of the spindle grinding head is visually parallel to the YOZ plane;

[0045] ② Move the X-axis of the machine tool to point A of the spindle grinding head 3, and record the X-axis coordinate of the machine tool as x1;

[0046] ③ Move the Y axis of the machine tool to the rotation center O position, and record the distance moved by the Y axis as d;

[0047] ④Continue to move the same distance d along the negative direction of the Y axis;

[0048] ⑤ Move the X-axis of the machine tool to the A′ position of the spindle grinding head 3, and record the X-axis coordinate of the machine tool as x2;

[0049] ⑥ Calculate the projection of the spindle grinding head axis AA′ on the XOY plane and the Y-axis inclination If x1>x2, adjust the rotary table 1 counterclockwise to rotate an angle of β, otherwise adjust it clockwise. At this time, the axis of the spindle grinding head is adjusted from AA′ to A1A1′. Let A1A1′ be the origin position of the rotary table 1, that is, the 0° position.

[0050] (2) Adjust the verticality between the spindle grinding head axis and the rotary table axis (such as Figure 4 shown):

[0051] ① Move the machine tool Z axis to the A1 point position of the 0° spindle grinding head 3, and record the machine tool Z axis coordinate as z1;

[0052] ②Rotate the rotary table 1 180° clockwise;

[0053] ③ Move the machine tool Z axis to the A1′ point position of the -180° spindle grinding head 3, and record the machine tool Z axis coordinate as z2;

[0054] ④ Move the Y axis of the machine tool to the rotation center O position, and record the distance moved by the Y axis as d;

[0055] ⑤ Calculate the inclination angle between the projection of the spindle grinding head axis AA′ on the YOZ plane and the Y axis If z2>z1, the spindle grinding head 3 is inclined to the negative side of the Z axis, then tighten the fourth top screw 2-4 and loosen the fifth top screw 2-5; otherwise, tighten the fifth top screw 2-5 and loosen the fourth top screw 2-4;

[0056] ⑥ Repeat the above steps until the perpendicularity between the spindle grinding head axis and the rotary table axis reaches the required accuracy range.

[0057] (3) Adjustment of the deviation between the spindle grinding head axis and the rotary table axis (such as Figure 5 shown):

[0058] ① Move the machine tool X-axis to the A2 point position of the 0° spindle grinding head 3, and record the machine tool X-axis coordinate as x1;

[0059] ②Rotate the rotary table 1 180° clockwise;

[0060] ③ Move the machine tool X-axis to the same A2 position as the spindle grinding head 3 at -180°, and record the machine tool X-axis coordinate as x2;

[0061] ④ Calculate the deviation distance between the spindle grinding head axis and the rotary table axis If x1>x2, the axis of the spindle grinding head deviates to the positive direction of the X axis, tighten the first top screw 2-1, loosen the second top screw 2-2 and the third top screw 2-3, otherwise tighten the second top screw 2-2 and the third top screw 2-3, and loosen the first top screw 2-1;

[0062] ⑤ Repeat the above steps until the distance that the spindle grinding head axis deviates from the rotary table axis reaches the required accuracy range.

[0063] During the whole process, the installation accuracy of the spindle grinding head of the CNC tool grinder can be adjusted by only adjusting the rotation angle of the rotary table 1 and then tightening or loosening the top screw at the corresponding position. This method can not only adjust the installation accuracy of the spindle grinding head conveniently and quickly, but also greatly reduce the requirements for spare parts processing and assembly, and well solve the problem of spindle grinding head installation accuracy.

Claims

1. A method for adjusting the installation precision of a spindle grinding head of a CNC tool grinder, characterized in that: It comprises a connection plate (2) connecting a rotary table (1) and a spindle grinding head (3), a method for adjusting the deviation distance between the spindle grinding head axis and the rotary table axis, and a method for adjusting the perpendicularity between the spindle grinding head axis and the rotary table axis.

2. The method for adjusting the installation precision of the spindle grinding head of a CNC tool grinder according to claim 1, characterized in that: One end of the connecting plate (2) connected to the spindle grinding head (3) is evenly distributed with a first top screw mounting hole (201-1), a first top screw mounting hole (201-2) and a third top screw mounting hole (201-3) at intervals of 120°, and the three top screw mounting holes are respectively corresponding to the mounting of the first top screw (2-1), the second top screw (2-2) and the third top screw (2-3); one end of the connecting plate (2) connected to the spindle grinding head (3) is mirror-symmetrically provided with a fourth top screw mounting hole (201-4) and a fifth top screw mounting hole (201-5), and the two top screw mounting holes are used to mount the fourth top screw (2-4) and the fifth top screw (2-5); one end of the connecting plate (2) connected to the rotary table (1) is provided with a countersunk hole (202) for mounting the rotary table connecting screws, and one end of the connecting plate (2) connected to the spindle grinding head (3) is provided with a threaded hole (203) for fixing the spindle grinding head mounting screws.

3. The method for adjusting the installation precision of the spindle grinding head of a CNC tool grinder according to claim 2, characterized in that: When the axis of the spindle grinding head (3) tends to deviate from the axis of the rotary table (1) and the perpendicularity between the axis of the spindle grinding head and the axis of the rotary table (1) is out of tolerance, the deviation distance and the perpendicularity can be adjusted by adjusting the top screw installed on the connecting plate (2). The specific adjustment steps and methods are as follows: First, assume that the X, Y, and Z axes of the machine tool are defined according to the coordinate system, the angle between the projection of the spindle grinding head axis on the XOY plane and the Y axis is β, and the angle between the projection of the spindle grinding head axis on the YOZ plane and the Y axis is γ; (1) Adjust the spindle grinding head axis to be parallel to the YOZ plane: ① Rotate the rotary table (1) until the axis of the spindle grinding head is visually parallel to the YOZ plane; ② Move the X-axis of the machine tool to point A of the spindle grinding head (3), and record the X-axis coordinate of the machine tool as x1; ③ Move the Y axis of the machine tool to the rotation center O position, and record the distance moved by the Y axis as d; ④Continue to move the same distance d along the negative direction of the Y axis; ⑤ Move the X-axis of the machine tool to the A′ position of the spindle grinding head (3), and record the X-axis coordinate of the machine tool as x2; ⑥ Calculate the projection of the spindle grinding head axis AA′ on the XOY plane and the Y-axis inclination If x1>x2, then adjust the rotary table (1) counterclockwise to rotate by an angle of β, otherwise adjust it clockwise. At this time, the axis of the spindle grinding head is adjusted from AA′ to A1A1′, and A1A1′ is assumed to be the origin position of the rotary table (1), that is, the 0° position; (2) Adjust the verticality between the axis of the spindle grinding head and the axis of the rotary table: ① Move the machine tool Z axis to the 0° spindle grinding head (3) point A1 position and record the machine tool Z axis coordinate as z1; ②Rotate the rotary table (1) 180° clockwise; ③ Move the Z axis of the machine tool to the position of the spindle grinding head (3) A1′ at -180°, and record the Z axis coordinate of the machine tool as z2; ④ Move the Y axis of the machine tool to the rotation center O position, and record the distance moved by the Y axis as d; ⑤ Calculate the inclination angle between the projection of the spindle grinding head axis AA′ on the YOZ plane and the Y axis If z2>z1, the spindle grinding head (3) is inclined toward the negative side of the Z axis, then the fourth top screw (2-4) is tightened and the fifth top screw (2-5) is loosened; otherwise, the fifth top screw (2-5) is tightened and the fourth top screw (2-4) is loosened; ⑥ Repeat the above steps until the verticality between the spindle grinding head axis and the rotary table axis reaches the required accuracy range; (3) Adjustment of the deviation distance between the spindle grinding head axis and the rotary table axis: ① Move the X-axis of the machine tool to the position of point A2 of the spindle grinding head (3) at 0°, and record the X-axis coordinate of the machine tool as x1; ②Rotate the rotary table (1) 180° clockwise; ③ Move the X-axis of the machine tool to the same position of point A2 at -180° of the spindle grinding head (3), and record the X-axis coordinate of the machine tool as x2; ④ Calculate the deviation distance between the spindle grinding head axis and the rotary table axis If x1>x2, the axis of the spindle grinding head deviates toward the positive direction of the X-axis, then tighten the first top screw (2-1), loosen the second top screw (2-2) and the third top screw (2-3); otherwise, tighten the second top screw (2-2) and the third top screw (2-3), and loosen the first top screw (2-1); ⑤ Repeat the above steps until the distance that the spindle grinding head axis deviates from the rotary table axis reaches the required accuracy range.

Images