A-axis positioning accuracy detection adjustment device and detection adjustment method

Abstract

The application belongs to the technical field of machining machine tools, and discloses an A-axis positioning precision detection adjusting device and a detection adjusting method. The A-axis positioning precision detection adjusting device comprises an L-shaped plate connected to an A-axis, a positioning base plate, an adjusting plate, a V-shaped seat, a positioning block, an adjusting bolt and a detection assembly arranged on the L-shaped plate in sequence. A detection core rod is arranged in a V-shaped opening of the V-shaped seat. The adjusting plate is used for adjusting the Z-direction position of the V-shaped seat. The positioning block is fixed to the L-shaped plate and located on one side of the positioning base plate along the Y-direction. The adjusting bolt passes through the positioning block and is threadedly connected to the side surface of the positioning base plate to adjust the Y-direction position of the V-shaped seat. The detection assembly is installed on a machine tool main shaft. The machine tool main shaft can drive the detection assembly to move along the X-direction to measure the deviation values of the upper generatrix and the side generatrix of the detection core rod. The positioning precision of the A-axis can be improved.

Description

Technical Field

[0001] This invention relates to the field of machine tool technology, and in particular to an A-axis positioning accuracy detection and adjustment device and method. Background Technology

[0002] In machining center applications, the positioning accuracy of the A-axis needs to be tested and adjusted. V-blocks are commonly used positioning elements in machine tool fixtures. A machining center includes two spaced-apart A-axises, with fixtures fixed on the A-axis for clamping and machining the shaft. The A-axis refers to the axis of rotation in the XYZ coordinate system of the machining center, which rotates around the horizontal X-axis. The Z-axis is vertical, and the Y-axis is horizontal and perpendicular to the X-axis. In existing technologies, when using V-blocks to test the positioning accuracy of the A-axis fixture, the positioning center line of the V-block is not aligned with the rotation center of the A-axis, making accuracy difficult to test. This results in low positioning accuracy of the A-axis fixture, difficulty in adjustment, and a high scrap rate. Summary of the Invention

[0003] The purpose of this invention is to provide an A-axis positioning accuracy detection and adjustment device and method to solve the problem of adjustment difficulties in A-axis positioning detection of V-type seats, so as to improve A-axis positioning accuracy.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] This invention first provides an A-axis positioning accuracy detection and adjustment device, comprising:

[0006] Two L-shaped plates are provided and are respectively installed on two A-axis. The vertical plate of the L-shaped plate is fixedly connected to the A-axis.

[0007] A positioning base plate, which is located on the horizontal plate of the L-shaped plate;

[0008] V-shaped seat, the V-shaped seat is disposed on the positioning base plate, and the detection mandrel is disposed in the V-shaped opening of the V-shaped seat;

[0009] An adjustment plate is disposed between the positioning base plate and the V-shaped seat, and the adjustment plate is used to adjust the Z-direction position of the V-shaped seat;

[0010] A positioning block, which is fixed to the L-shaped plate and located on one side of the positioning base plate along the Y direction;

[0011] An adjusting bolt passes through the positioning block and is threaded to the side of the adjusting plate. The adjusting bolt is used to adjust the Y-direction position of the V-shaped seat.

[0012] A detection component is mounted on a machine tool spindle, which can drive the detection component to move along the X-axis to measure the deviation between the upper generatrix and the side generatrix of the detection mandrel.

[0013] Optionally, two adjusting bolts are provided, and the two adjusting bolts are spaced apart along the X direction.

[0014] Optionally, the A-axis positioning accuracy detection and adjustment device further includes a shim, which is disposed in the V-shaped opening of the V-shaped seat and fits against the inner wall of the V-shaped opening, and the detection mandrel is located on the shim.

[0015] Optionally, the V-shaped seat and the positioning base plate are detachably connected, and the positioning base plate and the cross plate of the L-shaped plate are detachably connected.

[0016] The present invention also provides an A-axis positioning accuracy detection and adjustment method, which, according to the A-axis positioning accuracy detection and adjustment device, includes the following steps:

[0017] S1, fix the first detection mandrel on the two A axes respectively, perform positioning accuracy detection on the two first detection mandrels respectively through the detection component, adjust the Z-axis position of the V-shaped seat by adjusting the thickness of the adjustment plate, and adjust the Y-axis position of the V-shaped seat by adjusting the screw depth of the adjustment bolt.

[0018] S2, simultaneously fix the second detection mandrel on both A axes, perform positioning accuracy detection on the second detection mandrel through the detection component, adjust the Z-axis position of the V-shaped seat by adjusting the thickness of the adjustment plate, and adjust the Y-axis position of the V-shaped seat by adjusting the screw depth of the adjustment bolt.

[0019] Optionally, step S1 specifically includes:

[0020] S11, the rotation angle of the A-axis is 0°, the machine tool spindle drives the detection component to move along the X direction at the highest point of the outer circle upper surface of the first detection mandrel to measure, and obtain the maximum and minimum values ​​of the upper generatrix of the first detection mandrel;

[0021] S12, the rotation angle of the A-axis is 0°, the machine tool spindle drives the detection component to move along the X direction at the highest point of the outer circle side surface of the first detection mandrel to measure, and obtain the maximum and minimum values ​​of the side generatrix of the first detection mandrel;

[0022] S13, the rotation angle of the A-axis is 0°, the machine tool spindle drives the detection component to be located at one end of the first detection mandrel, the A-axis rotates one revolution, and the detection component measures the coaxiality value between the first detection mandrel and the A-axis.

[0023] Optionally, in step S11, if the difference between the maximum and minimum values ​​of the upper busbar of the first detection core is greater than 0.01 mm, the thickness of the adjustment plate is adjusted until the difference is less than or equal to 0.01 mm.

[0024] Optionally, in step S12, if the difference between the maximum and minimum values ​​of the side generatrix of the first detection mandrel is greater than 0.01 mm, the screwing depth of the adjusting bolt is adjusted until the difference is less than or equal to 0.01 mm.

[0025] Optionally, in step S13, when the A-axis rotates one revolution and the detection component measures the maximum and minimum values ​​of the highest point on the outer surface of the first detection mandrel when the rotation angle of the A-axis is 90°, 180°, 270° and 0°, the difference between the maximum and minimum values ​​of the highest point on the outer surface of the first detection mandrel is adjusted to be less than 0.03mm by adjusting the thickness of the adjustment plate and the screwing depth of the adjustment bolt.

[0026] Optionally, step S2 specifically includes:

[0027] The rotation angle of both A axes is 0°. The detection component is located at the highest point of the outer circle upper surface of the second detection mandrel. The machine tool spindle drives the detection component to move along the X direction to measure the maximum and minimum values ​​of the upper generatrix of the second detection mandrel.

[0028] The rotation angle of both A axes is 0°. The detection component is located at the highest point of the outer circular side surface of the second detection mandrel. The machine tool spindle drives the detection component to move along the X direction to measure the maximum and minimum values ​​of the side generatrix of the second detection mandrel.

[0029] The two A-axis are rotated simultaneously by 90°, 180°, 270° and 0° in sequence, and the deviation values ​​of the upper generatrix and the side generatrix of the second detection mandrel are measured in sequence.

[0030] The beneficial effects of this invention are:

[0031] The A-axis positioning accuracy detection and adjustment device provided by this invention, by installing a detection component on the machine tool spindle, can detect and measure the deviation values ​​of the upper generatrix and side generatrix of the detection mandrel through the machine tool spindle driving the detection component. Based on the detection and measurement results, by setting an adjustment plate at the bottom of the V-slot, the Z-axis position of the V-slot can be adjusted by adjusting the thickness of the adjustment plate to reduce the deviation value of the upper generatrix; by setting a positioning block and adjusting bolt, the Y-axis position of the V-slot can be adjusted to reduce the deviation value of the side generatrix. Thus, by adjusting the positioning of the V-slot and the detection mandrel, the positioning accuracy of the A-axis can be detected and adjusted, thereby improving the positioning accuracy of the A-axis.

[0032] The A-axis positioning accuracy detection and adjustment method provided by the present invention can adjust and improve the positioning accuracy of the two A-axis by setting a first detection mandrel on each of the two A-axis for positioning detection; and can adjust and improve the coaxial positioning accuracy of the two A-axis by setting a second detection mandrel on both A-axis for positioning detection, thereby improving the A-axis positioning accuracy of the machining center worktable. Attached Figure Description

[0033] Figure 1 This is a first-view structural schematic diagram of the A-axis positioning accuracy detection and adjustment device provided in an embodiment of the present invention;

[0034] Figure 2 This is a second-view structural schematic diagram of the A-axis positioning accuracy detection and adjustment device provided in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of the first detection mandrel in the A-axis positioning accuracy detection and adjustment method provided in this embodiment of the invention, at the position where the A-axis rotation angle is 0°;

[0036] Figure 4 This is a schematic diagram of the structure of the first detection mandrel at a 90° rotation angle on the A-axis in the A-axis positioning accuracy detection and adjustment method provided in this embodiment of the invention;

[0037] Figure 5 This is a schematic diagram of the structure of the second detection mandrel in the A-axis positioning accuracy detection and adjustment method provided in this embodiment of the invention, at the position where the A-axis rotation angle is 0°;

[0038] Figure 6 This is a schematic diagram of the structure of the second detection mandrel at a 90° rotation angle on the A-axis in the A-axis positioning accuracy detection and adjustment method provided in this embodiment of the invention.

[0039] In the picture:

[0040] 100, A-axis; 200, machine tool spindle; 300, detection mandrel; 301, first detection mandrel; 302, second detection mandrel;

[0041] 1. L-shaped plate; 2. Positioning base plate; 3. V-shaped seat; 4. Adjusting plate; 5. Positioning block; 6. Adjusting bolt; 7. Detection assembly; 71. Dial indicator; 72. Detection probe; 8. Gasket. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0043] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0046] like Figure 1 and Figure 2 As shown, this embodiment of the invention provides an A-axis positioning accuracy detection and adjustment device. An A-axis 100 is mounted on the worktable of a machining center, positioned along the X-axis and capable of rotating around it. Two opposing A-axis 100s are mounted on each worktable, and the A-axis 100 is used to clamp workpieces for machining. A machine tool spindle 200 is also mounted on the worktable, positioned along the Z-axis and capable of moving along the X-axis. The A-axis positioning accuracy detection and adjustment device provided in this embodiment detects and adjusts the position of the detection mandrel 300 to detect and adjust the A-axis 100, thereby improving the positioning accuracy of the A-axis 100. Figure 1 and Figure 2As shown, the A-axis positioning accuracy detection and adjustment device includes an L-shaped plate 1, a positioning base plate 2, a V-shaped seat 3, an adjustment plate 4, a positioning block 5, an adjustment bolt 6, and a detection component 7. There are two L-shaped plates 1, which are respectively installed on two A-axis 100. The vertical plate of the L-shaped plate 1 is fixedly connected to the A-axis 100 and can rotate with the A-axis 100. The positioning base plate 2 is located on the horizontal plate of the L-shaped plate 1. The positioning base plate 2 and the horizontal plate of the L-shaped plate 1 can be connected by bolts to achieve a detachable connection, so as to facilitate positioning locking after adjustment. V-shaped seat 3 is mounted on positioning base plate 2, and detection mandrel 300 is positioned within the V-shaped opening of V-shaped seat 3, and is installed by self-centering positioning; adjustment plate 4 is located between positioning base plate 2 and V-shaped seat 3, and adjustment plate 4 is used to adjust the Z-direction position of V-shaped seat 3; positioning block 5 is fixed on L-shaped plate 1 and located on one side of positioning base plate 2 along the Y-direction; adjustment bolt 6 passes through positioning block 5 and is threaded to the side of adjustment plate 4, and adjustment bolt 6 is used to adjust the Y-direction position of V-shaped seat 3; detection assembly 7 is mounted on machine tool spindle 200, and machine tool spindle 200 can drive detection assembly 7 to move along the X-direction to measure the deviation value of the upper generatrix and side generatrix of detection mandrel 300. The specific detection method and steps will be explained in detail in the spindle positioning accuracy detection and adjustment method section below.

[0047] The A-axis positioning accuracy detection and adjustment device provided by this invention, by installing a detection component 7 on the machine tool spindle 200, can detect and measure the deviation values ​​of the upper generatrix and side generatrix of the detection mandrel 300 by driving the detection component 7 through the machine tool spindle 200. Based on the detection and measurement results, by setting an adjustment plate 4 at the bottom end of the V-shaped seat 3, the Z-direction position of the V-shaped seat 3 can be adjusted by adjusting the thickness of the adjustment plate 4 to reduce the deviation value of the upper generatrix; by setting a positioning block 5 and an adjusting bolt 6, the Y-direction position of the V-shaped seat 3 can be adjusted to reduce the deviation value of the side generatrix. Thus, by adjusting the positioning of the V-shaped seat 3 and the detection mandrel 300, the positioning accuracy of the A-axis can be detected and adjusted, thereby improving the positioning accuracy of the A-axis. The upper generatrix refers to the generatrix where the highest point of the upper surface of the outer circle of the detection mandrel 300 is located when the A-axis rotates at 0°, and the side generatrix refers to the generatrix where the highest point of the side surface of the outer circle of the detection mandrel 300 is located. Specifically, the deviation value can be determined by moving and measuring the detection component 7 driven by the machine tool spindle 200.

[0048] In the above embodiments, the adjustment plate 4 and the positioning base plate 2, as well as the adjustment plate 4 and the V-shaped seat 3, are detachably connected, facilitating the replacement of the adjustment plate 4 with the required thickness to achieve Z-axis adjustment of the V-shaped seat 3, i.e., height adjustment, so that the deviation value of the upper generatrix of the detection mandrel 300 is reduced to meet the accuracy requirements. As an optional solution, the Z-axis height adjustment of the V-shaped seat 3 can also be achieved by adding a metal sheet of appropriate thickness between the adjustment plate 4 and the V-shaped seat 3. The detection component 7 includes a dial indicator 71, which is mounted on the machine tool spindle 200. The detection probe 72 of the dial indicator 71 can elastically abut against the outer circumferential surface of the detection mandrel 300. When there are height fluctuations at different positions on the detection mandrel 300, such as different height differences, the detection probe 72 can elastically change to obtain corresponding measurement data.

[0049] Optionally, there are two adjusting bolts 6, which are spaced apart along the X direction.

[0050] like Figure 1 and Figure 2 As shown, the positioning block 5 is located on the left side of the positioning base plate 2, and its bottom end is fixed to the horizontal plate of the L-shaped plate 1. The positioning block 5 has two through holes along the X-direction. The adjusting bolt 6 passes through these through holes and is threaded to the side of the adjusting plate 4. By changing the screw depth of the adjusting bolt 6, the adjusting plate 4 can be moved in the Y-direction, thereby adjusting the Y-direction position of the V-shaped seat 3. The two adjusting bolts 6 can be adjusted individually or simultaneously. Adjusting the screw depth individually allows for the rotational adjustment of the V-shaped seat 3. When there is a deviation in the side generatrix of the detection mandrel 300, one of the adjusting bolts 6 can be adjusted individually.

[0051] It should be noted that the positions of the positioning base plate 2 and the adjusting plate 4 are interchangeable, and they can be used respectively to adjust the initial X-axis and Y-axis positions of the V-shaped seat 3. The adjusting bolt 6 is connected to either the positioning base plate 2 or the adjusting plate 4, which can move in the Y-axis. Since the positioning base plate 2, the adjusting plate 4, and the V-shaped seat 3 are integrally connected, integrated Y-axis adjustment is possible. Detachable connection methods include, but are not limited to, bolt connections or bolt-nut connections.

[0052] Optionally, the A-axis positioning accuracy detection and adjustment device also includes a shim 8, which is disposed in the V-shaped opening of the V-shaped seat 3 and fits against the inner wall of the V-shaped opening, with the detection mandrel 300 located on the shim 8.

[0053] like Figure 1 As shown, the gasket 8 has a certain length along the X direction to support the detection core 300, allowing the detection core 300 to self-center within the V-shaped seat 3. The surface of the gasket 8 is designed according to the required friction or support force of the outer circumferential surface of the detection core 300, giving the detection core 300 a good self-centering effect.

[0054] This invention also provides an A-axis positioning accuracy detection and adjustment method. Based on the aforementioned A-axis positioning accuracy detection and adjustment device, the A-axis positioning accuracy detection and adjustment method includes the following steps:

[0055] S1, as Figure 3 First detection mandrels 301 are fixed on two A-axis 100 respectively. The positioning accuracy of the two first detection mandrels 301 is detected by the detection component 7. The Z-direction position of the V-slot 3 is adjusted by adjusting the thickness of the adjustment plate 4, and the Y-direction position of the V-slot 3 is adjusted by adjusting the screw depth of the adjustment bolt 6.

[0056] In this embodiment, the first detection mandrel 301 is a short rod, and the first detection mandrels 301 on the two A-axis 100 are independent of each other, and independently detect the positioning accuracy of the two A-axis 100. The detection component 7 is fixed on the machine tool spindle 200. After detecting the left A-axis 100, the detection component 7 continues to detect the right A-axis 100 through the machine tool spindle 200. Since the two A-axis 100 are detected independently, this embodiment also needs to perform step S2 to determine the coaxiality between the two A-axis 100.

[0057] S2, fix the second detection core rod 302 on both A-axis 100 at the same time, perform positioning accuracy detection on the second detection core rod 302 through the detection component 7, adjust the Z-direction position of the V-shaped seat 3 by adjusting the thickness of the adjustment plate 4, and adjust the Y-direction position of the V-shaped seat 3 by adjusting the screw depth of the adjustment bolt 6.

[0058] The second detection core 302 is a long rod, and the two are respectively supported and fixed on the two A-axis 100, so that the coaxiality between the two A-axis can be detected.

[0059] The A-axis positioning accuracy detection and adjustment method provided by the present invention can adjust and improve the positioning accuracy of the two A-axis 100 by setting two first detection mandrels 301 on the two A-axis 100 respectively for positioning detection; and can adjust and improve the coaxial positioning accuracy of the two A-axis 100 by setting a second detection mandrel 302 on the two A-axis 100 simultaneously for positioning detection, thereby improving the positioning accuracy of the A-axis 100 of the machining center worktable.

[0060] Optionally, step S1 specifically includes:

[0061] S11, A-axis rotation angle is 0°, such as Figure 3 In the state shown, the machine tool spindle 200 drives the detection component 7 to move along the X direction to the highest point of the outer circle upper surface of the first detection mandrel 301 to measure and obtain the maximum and minimum values ​​of the upper generatrix of the first detection mandrel 301.

[0062] It should be noted that the detection component 7 performs a full-stroke movement measurement along the X direction from the highest point of the outer circumference of the first detection mandrel 301, that is, a movement measurement from one end of the first detection mandrel 301 to the other end. During the movement measurement, the maximum and minimum values ​​of the upper generatrix of the first detection mandrel 301 can be obtained, and the difference between the maximum and minimum values ​​can be calculated. Based on this difference, if the difference between the maximum and minimum values ​​of the upper generatrix of the first detection mandrel 301 is greater than 0.01mm, the thickness of the adjustment plate 4 is adjusted until the difference is less than or equal to 0.01mm. The method of adjusting the thickness of the adjustment plate 4 can be either by directly replacing the adjustment plate 4 with one of the corresponding height, or by inserting a fixing metal sheet between the adjustment plate 4 and the positioning base plate 2, or between the adjustment plate 4 and the V-shaped seat 3. By adjusting the thickness of the adjustment plate 4, it can be understood that the adjustment plate 4 can be of uniform thickness or gradually varying thickness. After the adjustment plate 4 is set according to the magnitude of the difference, it is replaced between the positioning base plate 2 and the V-shaped seat 3.

[0063] S12, the rotation angle of the A-axis 100 is 0°. The machine tool spindle 200 drives the detection component 7 to move along the X direction to the highest point of the outer circle side surface of the first detection mandrel 301 to measure and obtain the maximum and minimum values ​​of the side generatrix of the first detection mandrel 301. If the difference between the maximum and minimum values ​​of the side generatrix of the first detection mandrel 301 is greater than 0.01mm, the screwing depth of the adjusting bolt 6 is adjusted until the difference is less than or equal to 0.01mm.

[0064] It is understandable that the adjusting bolt 6 can adjust the position of the V-shaped seat 3 in the Y direction, and the threaded adjustment method makes it easy to control the adjustment accuracy. Moreover, the adjusting bolt 6 can be adjusted in both forward and reverse directions, that is, it can achieve push-pull adjustment of the V-shaped seat 3 in the forward and reverse Y direction.

[0065] S13, the rotation angle of the A-axis 100 is 0°, the machine tool spindle 200 drives the detection component 7 to be located at one end of the first detection mandrel 301, the A-axis 100 rotates one revolution, and the detection component 7 measures the coaxiality value between the first detection mandrel 301 and the A-axis 100.

[0066] like Figure 4As shown, when axis A100 rotates 90°, the detection component 7 is located at the starting point of the right end of the first detection mandrel 301. At this time, the side generatrix is ​​the current upper generatrix position. The generatrix position is detected sequentially when the rotation angle is 180°, 270°, and 0° to obtain the maximum and minimum values ​​of the highest point of the outer circle upper surface of the first detection mandrel 301. If the maximum value is equal to the minimum value, the coaxiality of the first detection mandrel 301 is considered to be qualified, and axis A100 does not need to be adjusted. If the difference between the maximum and minimum values ​​is greater than or equal to 0.03mm, the difference between the maximum and minimum values ​​of the upper generatrix of the highest point of the outer circle upper surface of the first detection mandrel 301 is adjusted to be less than 0.03mm by adjusting the thickness of the adjusting plate 4 and the screw depth of the adjusting bolt 6.

[0067] The above detection method detects the side generatrix and upper generatrix on the outer circle of the same diameter by rotating the A-axis 100 one revolution and calculates the difference, which reflects the coaxiality of the A-axis 100 with respect to the first detection mandrel 301. The coaxiality can be improved by adjusting the thickness of the adjustment plate 4 and the adjustment bolt 6.

[0068] After the A-axis 100 on one side is detected, the same steps S11-S13 are performed on the A-axis 100 on the other side to achieve individual positioning accuracy detection and adjustment of the two A-axis 100.

[0069] Optionally, step S2 specifically includes:

[0070] S21, as Figure 5 The rotation angle of both A-axis 100 is 0°. The detection component 7 is located at the highest point of the outer circle upper surface of the second detection mandrel 302. The machine tool spindle 200 drives the detection component 7 to move along the X direction to measure the maximum and minimum values ​​of the upper generatrix of the second detection mandrel 302.

[0071] The second detection mandrel 302 is fixed at both ends to the two A-axis 100s, and the two A-axis 100s are detected simultaneously. The machine tool spindle 200 drives the detection assembly 7 to move along the X-axis from one end to the other at the highest point of the outer circle of the second detection mandrel 302. If the detected maximum and minimum values ​​are equal, it means that the heights of the two A-axis 100s are consistent and no adjustment is needed. If the difference between the maximum and minimum values ​​is greater than or equal to 0.01 mm, the difference is reduced to below 0.01 mm by adjusting the plate 4 to achieve the required positioning accuracy.

[0072] S22, the rotation angle of both A-axis 100 is 0°, the detection component 7 is located at the highest point of the outer circle side surface of the second detection core 302, the machine tool spindle 200 drives the detection component 7 to move along the X direction to measure the maximum and minimum values ​​of the side generatrix of the second detection core 302;

[0073] This step involves detecting the front-to-back centering position, i.e., the Y-axis position accuracy, of the second detection mandrel 302. The machine tool spindle 200 contacts the detection probe 71 of the detection component 7 with the highest point of the outer circular side surface of the second detection mandrel 302, and performs a full-stroke detection from one end of the second detection mandrel 302 to the other end, detecting the maximum and minimum values ​​of the side generatrix. If the maximum and minimum values ​​are equal, no adjustment is needed, and the current positioning accuracy meets the requirements. If the difference between the maximum and minimum values ​​is greater than or equal to 0.01mm, the Y-axis position of the V-shaped seat 3 is adjusted by adjusting the adjusting bolt 6 until the difference is less than 0.01mm.

[0074] S23, the two A-axis 100 rotate simultaneously by 90°, 180°, 270° and 0° in sequence, and measure the deviation value of the upper generatrix of the second detection core 302 and the deviation value of the side generatrix of the second detection core 302 in sequence.

[0075] like Figure 6 The diagram shows the position of A-axis 100 at a rotation angle of 90°. At this point, the detection component 7 is placed at one end of the second detection mandrel 302, and the current upper generatrix position data is measured. A-axis 100 continues to rotate to rotation angles of 180°, 270°, and 0°, and the current upper generatrix position data is measured again. The difference between the maximum and minimum values ​​of the four upper generatrix position data for one full rotation of A-axis 100 is calculated. If the difference between the maximum and minimum values ​​is greater than or equal to 0.03 mm, the difference between the maximum and minimum values ​​of the highest point on the outer surface of the second detection mandrel 302 is adjusted to be less than 0.03 mm by adjusting the thickness of the adjusting plate 4 and the screw depth of the adjusting bolt 6. It can be understood that, under the requirement of positioning detection accuracy, multiple detections can be performed on A-axis 100 at multiple rotation angles and detection positions as needed.

[0076] By applying the above-mentioned A-axis positioning accuracy detection and adjustment device and detection and adjustment method provided by the present invention, the problems of insufficient accuracy and low processing efficiency of the A-axis 100 in the positioning process of existing machining center machine tools can be solved, thereby improving the positioning accuracy of the A-axis 100 and reducing the machining scrap rate caused by low workpiece positioning.

[0077] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An A-axis positioning accuracy detection and adjustment device, characterized in that, include: L-shaped plate (1), two L-shaped plates (1) are provided and are respectively installed on two A-axis (100), and the vertical plate of the L-shaped plate (1) is fixedly connected to the A-axis (100); Positioning base plate (2), the positioning base plate (2) is located on the horizontal plate of the L-shaped plate (1); V-shaped seat (3), the V-shaped seat (3) is disposed on the positioning base plate (2), and the detection core rod (300) is disposed in the V-shaped opening of the V-shaped seat (3); Adjustment plate (4), the adjustment plate (4) is disposed between the positioning base plate (2) and the V-shaped seat (3) and is detachably connected to the positioning base plate (2) and the V-shaped seat (3), the adjustment plate (4) is used to adjust the Z-direction position of the V-shaped seat (3); Positioning block (5), the positioning block (5) is fixed on the L-shaped plate (1) and located on one side of the positioning base plate (2) along the Y direction; Adjusting bolt (6), the adjusting bolt (6) passes through the positioning block (5) and is threaded to the side of the adjusting plate (4), the adjusting bolt (6) is used to adjust the Y position of the V-shaped seat (3); The detection component (7) is mounted on the machine tool spindle (200). The machine tool spindle (200) can drive the detection component (7) to move along the X direction to measure the deviation value of the upper generatrix and the side generatrix of the detection mandrel (300). The adjustment plate (4) of different thicknesses can be replaced, and a metal sheet is provided between the adjustment plate (4) and the V-shaped seat (3); There are two adjusting bolts (6), and the two adjusting bolts (6) are spaced apart along the X direction.

2. The A-axis positioning accuracy detection and adjustment device according to claim 1, characterized in that, It also includes a gasket (8), which is disposed in the V-shaped opening of the V-shaped seat (3) and fits against the inner wall of the V-shaped opening. The detection core (300) is located on the gasket (8).

3. The A-axis positioning accuracy detection and adjustment device according to claim 1, characterized in that, The V-shaped seat (3) and the positioning base plate (2) are detachably connected, and the positioning base plate (2) and the horizontal plate of the L-shaped plate (1) are detachably connected.

4. A method for detecting and adjusting the positioning accuracy of the A-axis, characterized in that, According to any one of claims 1-3, the A-axis positioning accuracy detection and adjustment method comprises the following steps: S1, fix the first detection mandrel (301) on the two A axes (100) respectively, and perform positioning accuracy detection on the two first detection mandrels (301) respectively by the detection assembly (7). Adjust the thickness of the adjustment plate (4) to adjust the Z-direction position of the V-shaped seat (3), and adjust the Y-direction position of the V-shaped seat (3) by adjusting the screw depth of the adjustment bolt (6). S2, fix the second detection mandrel (302) on both A axes (100) at the same time, perform positioning accuracy detection on the second detection mandrel (302) through the detection component (7), adjust the Z-direction position of the V-shaped seat (3) by adjusting the thickness of the adjustment plate (4), and adjust the Y-direction position of the V-shaped seat (3) by adjusting the screw depth of the adjustment bolt (6).

5. The A-axis positioning accuracy detection and adjustment method according to claim 4, characterized in that, Step S1 is as follows: S11, the rotation angle of the A-axis (100) is 0°, and the machine tool spindle (200) drives the detection component (7) to move and measure along the X direction at the highest point of the outer circle upper surface of the first detection mandrel (301) to obtain the maximum and minimum values ​​of the upper generatrix of the first detection mandrel (301); S12, the rotation angle of the A-axis (100) is 0°, the machine tool spindle (200) drives the detection component (7) to move and measure along the X direction at the highest point of the outer circle side surface of the first detection mandrel (301), so as to obtain the maximum and minimum values ​​of the side generatrix of the first detection mandrel (301); S13, the rotation angle of the A-axis (100) is 0°, the machine tool spindle (200) drives the detection component (7) to be located at one end of the first detection mandrel (301), the A-axis (100) rotates one revolution, and the detection component (7) measures the coaxiality value between the first detection mandrel (301) and the A-axis (100).

6. The A-axis positioning accuracy detection and adjustment method according to claim 5, characterized in that, In step S11, if the difference between the maximum and minimum values ​​of the upper busbar of the first detection core rod (301) is greater than 0.01 mm, the thickness of the adjustment plate (4) is adjusted until the difference is less than or equal to 0.01 mm.

7. The A-axis positioning accuracy detection and adjustment method according to claim 5, characterized in that, In step S12, if the difference between the maximum and minimum values ​​of the side busbar of the first detection core rod (301) is greater than 0.01 mm, the screwing depth of the adjusting bolt (6) is adjusted until the difference is less than or equal to 0.01 mm.

8. The A-axis positioning accuracy detection and adjustment method according to claim 5, characterized in that, In step S13, when the A-axis (100) rotates one revolution, the detection component (7) measures the maximum and minimum values ​​of the highest point on the outer surface of the first detection mandrel (301) when the rotation angle of the A-axis (100) is 90°, 180°, 270° and 0°. The difference between the maximum and minimum values ​​of the highest point on the outer surface of the first detection mandrel (301) is adjusted to be less than 0.03 mm by adjusting the thickness of the adjustment plate (4) and the screwing depth of the adjustment bolt (6).

9. The A-axis positioning accuracy detection and adjustment method according to claim 4, characterized in that, Step S2 is as follows: The rotation angle of both A-axis (100) is 0°. The detection component (7) is located at the highest point of the outer circle upper surface of the second detection mandrel (302). The machine tool spindle (200) drives the detection component (7) to move along the X direction to measure the maximum and minimum values ​​of the upper generatrix of the second detection mandrel (302). The rotation angle of both A-axis (100) is 0°. The detection component (7) is located at the highest point of the outer circular side surface of the second detection mandrel (302). The machine tool spindle (200) drives the detection component (7) to move along the X direction to measure the maximum and minimum values ​​of the side generatrix of the second detection mandrel (302). The two A-axis (100) rotate simultaneously by 90°, 180°, 270° and 0° in sequence, and the deviation values ​​of the upper generatrix and the side generatrix of the second detection mandrel (302) are measured in sequence.

Images