Rotary table band-type brake offset detection device and detection method

Abstract

The invention relates to the technical field of machine tool detection, and provides a rotary table band-type brake deviation detection device and method. The rotary table band-type brake offset detection device comprises a base, a top seat, a connecting rod and a standard ball. A first end of the top seat is connected with the base, and a second end of the top seat is provided with a first mounting surface. One end of the connecting rod is connected with the standard ball, and the other end of the connecting rod is connected with the first mounting surface and is perpendicular to the first mounting surface. The rotary table band-type brake deviation detection device is easy and convenient to operate, high in detection efficiency and accurate in detection result.

Description

Technical Field

[0001] The present invention relates to the technical field of machine tool detection, and in particular to a turntable brake deviation detection device and a detection method. Background Art

[0002] The turntable is an important machine tool accessory that provides rotation coordinates for the machine tool. The fourth and fifth axes drive the turntable to complete equal, non-equal or continuous rotation processing, and can process complex curved surfaces. In a four-axis or five-axis turntable, the turntable is often braked and released by a brake assembly. Turntable brake offset detection is an important indicator to measure the positioning accuracy of the turntable brake. Only machines with small turntable brake offset can improve processing accuracy and stability when the turntable brake is required at the machine end for high-precision positioning. Therefore, multi-axis CNC machine tools with turntable brake function need to be strictly tested after assembly to ensure the accuracy of the test results.

[0003] At present, the turntable brake offset detection method mainly uses a mechanical micrometer to install a test rod on the turntable for manual measurement, and records the readings. The detection process requires repeated manual adjustments and records, which not only requires a high level of skill for the operator, but also makes the detection process complicated, inefficient, and the detection results are not accurate enough. Summary of the invention

[0004] The invention provides a turntable brake deviation detection device and a detection method, which are used to solve the problems of complex operation, low efficiency and inaccurate results in the prior art when detecting the turntable brake deviation.

[0005] In order to solve the above-mentioned technical problems, the present invention is achieved as follows: In a first aspect, the present invention provides a turntable brake deviation detection device, comprising: a base, a top seat, a connecting rod and a standard ball; The base is used to be mounted on the turntable, the first end of the top seat is connected to the base, and the second end of the top seat has a first mounting surface; One end of the connecting rod is connected to the standard ball, and the other end of the connecting rod is connected to the first mounting surface and is arranged perpendicular to the first mounting surface.

[0006] According to a turntable brake deviation detection device provided by the present invention, the second end of the top seat further has a second mounting surface; The first mounting surface and the second mounting surface are connected obliquely; The other end of the connecting rod can be selectively connected to the first mounting surface or the second mounting surface.

[0007] According to a turntable brake deviation detection device provided by the present invention, the angle between the first mounting surface and the second mounting surface is 135 degrees.

[0008] According to a turntable brake deviation detection device provided by the present invention, the base and the top seat are connected via an adapter seat; There are multiple adapters, and the multiple adapters have different height specifications.

[0009] According to a turntable brake deviation detection device provided by the present invention, U-shaped holes are provided at both ends of the base; The U-shaped hole extends along the length direction of the base, and a step groove is provided in the hole wall of the U-shaped hole.

[0010] In a second aspect, the present invention provides a detection method based on the turntable brake offset detection device as described above, comprising: Obtain the first spherical center coordinates of the standard sphere when the turntable brake is in the first state; Obtain the second spherical center coordinates of the standard sphere when the turntable brake is in the second state; The spherical center offset of the standard sphere is calculated based on the first spherical center coordinates and the second spherical center coordinates.

[0011] According to a detection method provided by the present invention, when performing brake offset detection on a single fourth-axis turntable, the method further includes: Adjust the angle of the connecting rod to ensure that the maximum diameter of the standard ball does not interfere with the projection of the connecting rod in the horizontal plane.

[0012] According to a detection method provided by the present invention, when performing brake offset detection on a cantilever combined turntable, obtaining the second spherical center coordinates of a standard sphere when the turntable brake is in a second state includes: Obtain different values ​​of the second spherical center coordinates of the standard sphere when the fourth axis B-axis turntable brake and the fifth axis C-axis turntable brake are in the clamped or released state respectively; The fourth axis B axis turntable is respectively at 0 degree, +90 degrees and -90 degrees for detection, and when the fourth axis B axis turntable is at 0 degree, the fifth axis C axis turntable is detected every 90 degrees.

[0013] According to a detection method provided by the present invention, when a combined brake offset detection is performed on a cradle-type combined turntable, obtaining the second spherical center coordinates of a standard sphere when the turntable brake is in a second state includes: Obtain different values ​​of the second sphere center coordinate when the fourth axis A-axis turntable brake is in a clamped or released state, and when the fifth axis is in a clamped or released state; The fourth axis A-axis turntable is respectively at 0 degrees, +90 degrees and -90 degrees for detection, and when the fourth axis A-axis turntable is at 0 degrees, the fifth axis C-axis turntable is detected every 90 degrees.

[0014] According to a detection method provided by the present invention, the step of obtaining the first spherical center coordinates of a standard sphere when the turntable brake is in a first state includes: Get the Z coordinate of the center of the sphere; Based on the Z coordinate of the sphere center, obtain the maximum diameter cross-section circle of the standard sphere; A plurality of evenly distributed measuring points are obtained based on the maximum diameter cross-sectional circle, and the XY coordinates of the plurality of measuring points are obtained, and the XY coordinates of the center of the sphere are calculated.

[0015] The turntable brake offset detection device and detection method provided by the present invention are configured with a base, a top seat, a connecting rod and a standard ball, and one end of the connecting rod is connected to the standard ball, and the other end is vertically installed on the first mounting surface of the top seat, so that the center coordinates of the standard ball can be detected respectively in different states of the turntable brake being clamped and released, and the offset after the turntable brake state is switched is calculated by comparing the center coordinates of the ball in different states, thereby judging the positioning accuracy of the turntable brake. Compared with manual measurement and reading and recording, the turntable brake offset detection device of this embodiment is easy to operate, has high detection efficiency, and produces accurate detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is one of the three-dimensional structural schematic diagrams of the turntable brake deviation detection device provided by the present invention.

[0018] Figure 2 This is the second three-dimensional structural schematic diagram of the turntable brake deviation detection device provided by the present invention.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the base provided by the present invention.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the top seat provided by the present invention.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the connecting rod and the standard ball provided by the present invention.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the adapter provided by the present invention.

[0023] Figure 7It is a schematic diagram of the turntable brake deviation detection device provided by the present invention being installed on a separate fourth-axis A-axis turntable.

[0024] Figure 8 It is a schematic diagram of the turntable brake deviation detection device provided by the present invention being installed on a separate fourth-axis B-axis turntable.

[0025] Fig. 9 It is one of the schematic diagrams of the turntable brake deviation detection device provided by the present invention being installed on the fifth axis C-axis turntable of the cantilever combined turntable.

[0026] Fig.10 This is the second schematic diagram of the turntable brake deviation detection device provided by the present invention being installed on the fifth axis C-axis turntable of the cantilever combined turntable.

[0027] Fig.11 This is one of the schematic diagrams of the turntable brake deviation detection device provided by the present invention being installed on the fifth axis C-axis turntable of the cradle-type combined turntable.

[0028] Fig.12 This is the second schematic diagram of the turntable brake deviation detection device provided by the present invention being installed on the fifth axis C-axis turntable of the cradle-type combined turntable.

[0029] Fig.13 It is a schematic projection diagram of the turntable brake deviation detection device provided by the present invention on the XOZ plane.

[0030] Fig.14 It is a schematic projection diagram of the turntable brake deviation detection device provided by the present invention on the XOY plane.

[0031] Fig.15 It is a flow chart of a detection method based on a turntable brake deviation detection device provided by the present invention.

[0032] Fig.16 It is a schematic diagram of a process of performing brake offset detection on a single fourth-axis turntable provided by the present invention.

[0033] Fig.17 The present invention is a schematic diagram of a flow chart of brake offset detection for a cantilever combination turntable.

[0034] Fig.18 It is a schematic diagram of a flow chart of combined brake offset detection for a cradle-type combined turntable provided by the present invention.

[0035] Fig.19 It is a schematic diagram of a process for obtaining the first spherical center coordinates of a standard sphere when the turntable brake is in a first state provided by the present invention.

[0036] Fig. 20It is a schematic diagram of obtaining eight measurement points on the maximum diameter cross-section circle of the standard sphere in the vertical position provided by the present invention.

[0037] Fig.21 It is a schematic diagram of obtaining eight measurement points on the maximum diameter cross-sectional circle of the standard sphere when in the tilted position provided by the present invention.

[0038] Reference numerals: 1. Turntable brake deviation detection device; 11. base; 12. top seat; 13. connecting rod; 14. standard ball; 15. adapter seat; 111. U-shaped hole; 121. first mounting surface; 122. second mounting surface; 2. Fourth axis A-axis turntable; 3. Fourth axis B-axis turntable; 4. Cantilever fifth axis C-axis turntable; 5. Cradle fifth axis C-axis turntable. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Combine the following Figures 1 to 21 , the turntable brake offset detection device and detection method provided by the embodiment of the present invention are described in detail through specific embodiments and application scenarios.

[0041] First, as Figure 1 and Figure 2 As shown, this embodiment provides a turntable brake deviation detection device 1, including: a base 11, a top seat 12, a connecting rod 13 and a standard ball 14.

[0042] like Figure 3 and Figure 4 As shown, the base 11 is used to be installed on a turntable, a first end of the top seat 12 is connected to the base 11 , and a second end of the top seat 12 has a first installation surface 121 .

[0043] like Figure 5 As shown, one end of the connecting rod 13 is connected to the standard ball 14 , and the other end of the connecting rod 13 is connected to the first mounting surface 121 and is vertically arranged to the first mounting surface 121 .

[0044] The turntable brake offset detection device 1 of this example can be used for machine tools equipped with a single fourth axis, and can also be used for machine tools equipped with a cradle-type combined turntable or a cantilever-type combined turntable. The detection device can measure the spherical center coordinates of the standard ball 14 in the two states of the turntable brake clamping and releasing, and compare the different spherical center coordinates in the clamping state and the release state to determine the offset of the turntable brake after clamping, so as to determine the positioning error of the turntable brake in different states of clamping and releasing.

[0045] The base 11 of this embodiment is used to be installed on a turntable and serve as a mounting support. Specifically, the base 11 of this embodiment can be fixed on the fourth axis turntable or the fifth axis turntable. The fourth axis turntable includes an A axis turntable and a B axis turntable, and the fifth axis turntable is a C axis turntable.

[0046] The top seat 12 of this embodiment provides a first mounting surface 121 for the connecting rod 13 and the standard ball 14, and the connecting rod 13 is perpendicular to the top seat 12. A detector is installed on the upper side of the turntable to detect the standard ball 14 and calculate the spherical center coordinates of the standard ball 14. The detector collects and obtains the spherical center coordinates of the standard ball 14 in different states of the turntable's brake clamping and loosening, so as to calculate the offset of the spherical center coordinates of the standard ball 14 when the clamping state of the turntable's brake is switched.

[0047] Specifically, in this embodiment, mounting holes are provided on the base 11 and the top base 12, and the base 11 and the top base 12 are connected by pins or bolts. A mounting hole is also provided on the first mounting surface 121 of the top base 12, and one end of the connecting rod 13 can be inserted into the mounting hole of the top base 12 to be stably connected with the top base 12.

[0048] The turntable brake offset detection device 1 provided by the present invention is provided with a base 11, a top seat 12, a connecting rod 13 and a standard ball 14. One end of the connecting rod 13 is connected to the standard ball 14, and the other end is vertically installed on the first mounting surface 121 of the top seat 12, so that the center coordinates of the standard ball 14 can be detected respectively in different states of the turntable brake being clamped and released, and the offset after the turntable brake state is switched is calculated by comparing the center coordinates of the ball in different states, thereby judging the positioning accuracy of the turntable brake. Compared with manual measurement and reading and recording, the turntable brake offset detection device 1 of this embodiment is easy to operate, has high detection efficiency, and produces accurate detection results.

[0049] In some embodiments, Figure 4 As shown, the second end of the top seat 12 of this embodiment also has a second mounting surface 122 .

[0050] The first mounting surface 121 and the second mounting surface 122 are connected obliquely.

[0051] The other end of the connecting rod 13 can be selectively connected to the first mounting surface 121 or the second mounting surface 122 .

[0052] In this embodiment, the first mounting surface 121 is arranged parallel to the bottom wall of the top seat 12 , and the second mounting surface 122 is arranged obliquely to the bottom wall of the top seat 12 .

[0053] The acquisition of the turntable brake offset is mainly achieved by comparing the offset of the center coordinates of the standard sphere 14. When acquiring the center coordinates of the standard sphere 14, the detector is first used to acquire the coordinates of the points on the wall of the standard sphere 14, and the center coordinates are acquired by numerical fitting. Since the detector is usually installed on the upper side of the turntable, when the maximum diameter cross-sectional circle is acquired by projecting the detector onto the horizontal plane, the maximum diameter circumference of the standard sphere 14 cannot interfere with the standard rod within a range of 360 degrees, so as to avoid the geometric features of the acquired standard sphere 14 containing the characteristic information of the standard rod, thereby affecting the accuracy of the center coordinates of the standard sphere 14.

[0054] Therefore, in this embodiment, a second mounting surface 122 is further provided on the top seat 12. When the connecting rod 13 is installed on the first mounting surface 121 or the second mounting surface 122, the connecting rod 13 is vertically arranged with the first mounting surface 121 or the second mounting surface 122. When the connecting rod 13 is installed on the first mounting surface 121, in the case where the projection on the horizontal plane interferes with the connecting rod 13, the connecting rod 13 can be adjusted to the second mounting surface 122. Based on the inclined setting of the first mounting surface 121 and the second mounting surface 122, when the connecting rod 13 and the standard ball 14 are located on the second mounting surface 122, the projection of the standard ball 14 on the horizontal plane does not interfere with the connecting rod 13, thereby ensuring the correct acquisition of the spherical center coordinates of the standard ball 14.

[0055] In some embodiments, Figure 4 As shown, the included angle between the first mounting surface 121 and the second mounting surface 122 of this embodiment is 135 degrees.

[0056] When the included angle between the first mounting surface 121 and the second mounting surface 122 is 135 degrees, since the first mounting surface 121 is parallel to the bottom wall of the top seat 12 , the included angle between the second mounting surface 122 and the bottom wall of the top seat 12 is 45 degrees.

[0057] Since the turntable needs to be calibrated for the axis, the second mounting surface 122 can also be used to install the axis calibration tool. The top seat 12 can serve as a tool for the turntable brake detection device and can also be used for the axis detection tool, which expands the use scenarios of the top seat 12 and simplifies the types of tooling.

[0058] like Figure 6 As shown, the base 11 and the top seat 12 of this embodiment are connected via a transfer seat 15 .

[0059] There are multiple adapters 15 , and the multiple adapters 15 have different height specifications.

[0060] As a transition portion between the top seat 12 and the base 11, the length of the detection device can be adjusted by increasing or decreasing the number of multiple adapters 15 to adapt to the detection of turntable brakes of machine tools of different models.

[0061] Specifically, the adapter seat 15 is cylindrical and has a plurality of mounting holes, which can ensure quick installation and removal of the adapter seat 15 and the base 11 , the top seat 12 , and a plurality of adapter seats 15 .

[0062] In some embodiments, Figure 3 As shown, U-shaped holes 111 are provided at both ends of the base 11 of this embodiment.

[0063] The U-shaped hole 111 extends along the length direction of the base 11 , and a step groove is provided in the hole wall of the U-shaped hole 111 .

[0064] The U-shaped hole 111 of the base 11 is used to connect with the turntable, and the U-shaped hole 111 is fixed to the turntable by a pin or a bolt. Since the U-shaped hole 111 extends along the length direction of the base 11, the slight displacement of the base 11 and the turntable can be adjusted by adjusting the position of the pin or the bolt in the U-shaped hole 111. The step groove of the hole wall of the U-shaped hole 111 is used for the shaft of the pin or the screw of the bolt to pass through, and to limit the pin of the pin or the screw head of the bolt to be located in the U-shaped hole 111, so as to fix the pin or the bolt.

[0065] Second, as Fig.15 As shown, this embodiment provides a detection method of the turntable brake deviation detection device 1 as above, comprising the following steps: Step 1511, obtaining the first sphere center coordinates of the standard sphere 14 when the turntable brake is in the first state.

[0066] Step 1512, obtaining the second sphere center coordinates of the standard sphere 14 when the turntable brake is in the second state.

[0067] Step 1513, calculating the sphere center offset of the standard sphere 14 based on the first sphere center coordinates and the second sphere center coordinates.

[0068] When the turntable brake is detected for offset in this embodiment, the detection device is first installed on the turntable, and then the turntable is driven to rotate, and a position convenient for collecting the coordinates of the spherical wall of the standard sphere 14 is selected, and the first spherical center coordinates of the turntable brake in the first state and the second spherical center coordinates in the second state are obtained, and the offset of the second spherical center coordinates of the first spherical center coordinates is calculated to complete the detection of the turntable brake offset.

[0069] The turntable brake is in the first state, which means that the turntable brake being measured is in the released state. If the detection is a combined turntable brake, all turntable brakes are in the released state, that is, the first spherical center coordinate is the spherical center coordinate of the turntable brake in the initial state.

[0070] When the turntable brake is in the second state, it means that the turntable brake being measured is in the clamped state. If it is a combined turntable brake test, it can be in the state where some turntable brakes are clamped, some turntable brakes are released, or all turntable brakes are clamped.

[0071] At the same time, if it is necessary to detect the offset of the turntable brake at different rotation angles, the turntable must be rotated to the target angle first. At this time, the first spherical center coordinate refers to the spherical center coordinate in the disposal state where the turntable brakes are all released, and the second spherical center coordinate includes the spherical center coordinate after the state of the turntable brake is adjusted.

[0072] Specifically, this embodiment uses a detector to detect and acquire multiple coordinates of the sphere wall of the standard sphere 14, and calculates the coordinates of the center of the standard sphere 14 by numerical fitting, thereby realizing the conversion of the sphere wall coordinates of the standard sphere 14 to the sphere center coordinates.

[0073] After obtaining the first sphere center coordinate and the second sphere center coordinate, the difference between the first sphere center coordinate and the second sphere center coordinate in the XYZ direction is calculated to obtain the offset of the turntable brake in the three directions of XYZ.

[0074] The detection method of this embodiment only needs to install the detection device on the turntable, obtain the first sphere center coordinates in the first state of the turntable brake, and obtain the second sphere center coordinates in the second state of the turntable brake. By collecting the first sphere center coordinates and the second sphere center coordinates and calculating the offset, the offset of the turntable brake can be obtained. The entire detection only requires the installation of the detection device once, avoiding the tedious workload caused by manually and repeatedly adjusting the inspection fixture to find a suitable position. The acquisition of the sphere center coordinates is automatically calculated after being acquired by the detector, which also avoids a lot of manual calculation work, thereby improving the efficiency and accuracy of the detection.

[0075] like Figure 7 , Figure 8 and Fig.16 As shown, in the case of performing brake offset detection on a single fourth-axis turntable in this embodiment, the following steps are also included: Step 1611 , adjusting the angle of the connecting rod 13 to ensure that the maximum diameter of the standard ball 14 does not interfere with the projection of the connecting rod 13 in the horizontal plane.

[0076] like Fig.13 and Fig.14As shown, after the detection device is installed on the turntable, for the fourth axis A-axis turntable 2, the turntable is rotated so that the connecting rod 13 and the standard ball 14 are parallel to the XOZ plane, and the offset direction of the connecting rod 13 is tilted upward. At this time, the maximum diameter of the standard ball 14 has no interference with the projection of the connecting rod 13 in the horizontal plane, which is more conducive to obtaining the spherical wall coordinates of the standard ball 14.

[0077] For the fourth axis B-axis turntable 3, rotate the turntable so that the connecting rod 13 and the standard ball 14 are parallel to the YOZ plane, and the offset direction of the connecting rod 13 is tilted upward. At this time, the maximum diameter of the standard ball 14 has no interference with the projection of the connecting rod 13 in the horizontal plane, which is more conducive to obtaining the spherical wall coordinates of the standard ball 14.

[0078] It should be noted that the projection of the standard ball 14 is in the vertical downward direction, and only when the standard ball 14 is located in the vertical upward direction of the connecting rod 13, the connecting rod 13 will not interfere with the projection of the standard ball 14. Therefore, when performing brake offset detection on a single fourth-axis turntable, the connecting rod 13 and the standard ball 14 are usually installed on the second mounting surface 122 of the top seat 12, so that the standard rod and the axial direction of the top seat 12 are tilted, and the standard ball 14 is arranged obliquely upward toward the connecting rod 13. The connecting rod 13 has no interference with the projection of the maximum diameter of the standard ball 14 on the horizontal plane, ensuring the accuracy of obtaining the coordinates of the center of the standard ball 14.

[0079] like Fig. 9 , Fig.10 and Fig.17 As shown, in the case of brake offset detection for the cantilever combined turntable in this embodiment, obtaining the second spherical center coordinates of the standard sphere 14 when the turntable brake is in the second state includes the following steps: Step 1711, obtaining different values ​​of the second spherical center coordinates of the standard sphere 14 when the fourth-axis B-axis turntable 3 brake and the fifth-axis C-axis turntable brake are in the clamped or released state respectively.

[0080] The fourth axis B axis turntable 3 is respectively at 0 degree, +90 degrees and -90 degrees for detection, and when the fourth axis B axis turntable 3 is at 0 degree, the fifth axis C axis turntable is detected every 90 degrees.

[0081] The cantilever combined turntable has two turntables, the fourth-axis B-axis turntable 3 and the cantilever fifth-axis C-axis turntable 4. It is necessary to detect the offset of the turntable brake respectively when the fourth-axis B-axis turntable is 0 degrees, +90 degrees and -90 degrees. Therefore, the fourth-axis turntable controls the clamping and release of the fourth-axis B-axis turntable brake and the fifth-axis C-axis turntable brake at three angles, measures the first spherical center coordinates and the second spherical center coordinates at each angle, and calculates the offset at each angle.

[0082] For the cantilever combination turntable, the first spherical center coordinate refers to the spherical center coordinate of the standard sphere 14 when the fourth axis B axis and the fifth axis C axis turntable brakes are both in the released state.

[0083] The second sphere center coordinates include multiple values: the fourth axis B axis turntable brake is released, the fifth axis C axis turntable brake is clamped; the fourth axis B axis turntable brake is clamped, the fifth axis C axis turntable brake is released; the fourth axis B axis turntable brake is clamped, the fifth axis C axis turntable brake is clamped. For each situation, the second sphere center coordinates are collected and the offset is calculated with the first sphere center coordinates.

[0084] It should be noted that when performing brake offset detection on the cantilevered fourth-axis turntable, the base 11 is usually installed on the fifth-axis C-axis turntable, and the connecting rod 13 and the standard ball 14 are installed on the first mounting surface 121 of the top seat 12, so that the standard rod is installed perpendicular to the axial direction of the top seat 12, and the connecting rod 13 has no interference with the projection of the maximum diameter of the standard ball 14 on the horizontal plane, ensuring the accuracy of obtaining the center coordinates of the standard ball 14.

[0085] Furthermore, when the fourth-axis B-axis turntable 3 is at 0 degrees, the clamping and releasing of the fourth-axis B-axis turntable brake and the fifth-axis C-axis turntable brake are controlled at every 90 degrees, the first sphere center coordinate and the second sphere center coordinate of each angle are measured, and the offset is calculated at each angle.

[0086] like Fig.11 , Fig.12 and Fig.18 As shown, in the case of performing combined brake offset detection on the cradle-type combined turntable in this embodiment, obtaining the second spherical center coordinates of the standard sphere 14 when the turntable brake is in the second state includes the following steps: Step 1811, obtaining different values ​​of the second sphere center coordinates when the brake of the fourth axis A-axis turntable 2 is in a clamped or released state, and when the brake of the fifth axis C-axis turntable is in a clamped or released state.

[0087] The fourth axis A-axis turntable 2 is respectively at 0 degrees, +90 degrees and -90 degrees for detection, and when the fourth axis A-axis turntable is at 0 degrees, the fifth axis C-axis turntable is detected every 90 degrees.

[0088] The cradle-type combined turntable has two turntables, the fourth-axis A-axis turntable 2 and the cradle-type fifth-axis C-axis turntable 5. When performing combined brake detection on the fourth-axis A-axis turntable 2 and the fifth-axis C-axis turntable, it is necessary to detect the offset of the turntable brake respectively under three conditions: the fourth-axis A-axis turntable is 0 degrees, +90 degrees and -90 degrees. Therefore, the fourth-axis A-axis turntable controls the clamping and release of the fourth-axis A-axis turntable 2 brake and the fifth-axis C-axis turntable brake at three angles, measures the first spherical center coordinates and the second spherical center coordinates at each angle, and calculates the offset at each angle.

[0089] For the combined brake detection of the fourth axis turntable and the fifth axis turntable, the first spherical center coordinate refers to the spherical center coordinate of the standard sphere 14 when both the fourth axis A axis turntable 2 and the fifth axis C axis turntable are in the released state.

[0090] The second sphere center coordinates include multiple values: the fourth axis A axis turntable 2 brake is clamped, the fifth axis C axis turntable brake is released; the fourth axis A axis turntable 2 brake is released, the fifth axis C axis turntable brake is clamped; the fourth axis A axis turntable 2 brake is clamped, the fifth axis C axis turntable brake is clamped. For each situation, the second sphere center coordinates are collected and the offset is calculated with the first sphere center coordinates.

[0091] When the fourth-axis A-axis turntable 2 is at 0 degrees, the rotation of the fifth-axis C-axis turntable can also be adjusted. The brake status of the fourth-axis A-axis turntable 2 and the fifth-axis C-axis turntable can be adjusted every 90 degrees, and the first sphere center coordinates and the second sphere center coordinates are collected to obtain the offset of the fifth-axis C-axis turntable at different rotation angles.

[0092] It should be noted that when performing combined brake offset detection on the fourth-axis A-axis turntable 2 and the fifth-axis C-axis turntable, the base 11 is usually installed on the fifth-axis C-axis turntable, and the connecting rod 13 and the standard ball 14 are installed on the first mounting surface 121 of the top seat 12, so that the standard rod is installed perpendicular to the axial direction of the top seat 12, and the connecting rod 13 has no interference with the projection of the maximum diameter of the standard ball 14 on the horizontal plane, ensuring the accuracy of obtaining the center coordinates of the standard ball 14.

[0093] Furthermore, when the fourth-axis A-axis turntable 3 is at 0 degrees, the clamping and releasing of the fourth-axis A-axis turntable brake and the fifth-axis C-axis turntable brake are controlled at every 90 degrees, the first sphere center coordinate and the second sphere center coordinate of each angle are measured, and the offset is calculated at each angle.

[0094] like Fig.19 , Fig. 20 and Fig.21 As shown, the step of obtaining the first spherical center coordinates of the standard sphere 14 when the turntable brake is in the first state in this embodiment includes: Step 1911, obtain the Z coordinate of the center of the sphere.

[0095] Step 1912, based on the Z coordinate of the center of the sphere, obtain the maximum diameter cross-sectional circle of the standard sphere 14.

[0096] Step 1913, obtaining multiple uniformly distributed measurement points based on the maximum diameter cross-sectional circle, obtaining the XY coordinates of the multiple measurement points, and calculating the XY coordinates of the center of the sphere.

[0097] This embodiment uses a detector to detect the spherical wall coordinates of the standard sphere 14. First, the detector detects the vertices within a large range of the standard sphere 14, obtains a rough Z coordinate, subtracts the radius of the standard sphere 14, and obtains a Z-direction height close to the center of the sphere. At this Z-direction height, the detector is used to detect the coordinates (X1, Y1) and (X2, Y2) of the four equally divided points. The X coordinate of the center of the current cross-sectional circle is (X1+X2) / 2, and the Y coordinate of the center is (Y1+Y2) / 2. In the normal direction of the current cross-sectional circle, the vertex Z of the standard sphere 14 is found through the center coordinates, and the vertex Z is subtracted from the radius to obtain the Z coordinate of the center of the sphere. The circle intercepted in the horizontal direction at the Z height of the center of the sphere is the maximum diameter cross-sectional circle of the standard sphere 14.

[0098] Eight measurement points are evenly distributed on the maximum diameter cross-section circle of the obtained standard sphere 14, and the XY coordinates of the eight points are obtained. The XY coordinates of the center of the sphere are calculated by the least square method. The Z coordinate of the center of the sphere is the Z coordinate of the apex of the sphere minus the radius of the standard sphere 14.

[0099] It should be noted that, for obtaining the second spherical center coordinates of the standard ball 14 when the turntable brake is in the second state, since the difference between the first spherical center coordinates and the second spherical center coordinates is only the clamping and releasing of the turntable brake, the method for obtaining the spherical center coordinates is the same. The method for obtaining the second spherical center coordinates is exactly the same as the method for obtaining the first spherical center coordinates, and will not be repeated here.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A turntable brake deviation detection device, characterized in that: include: Base, top seat, connecting rod and standard ball; The base is used to be mounted on the turntable, the first end of the top seat is connected to the base, and the second end of the top seat has a first mounting surface; One end of the connecting rod is connected to the standard ball, and the other end of the connecting rod is connected to the first mounting surface and is arranged perpendicular to the first mounting surface.

2. The turntable brake deviation detection device according to claim 1, characterized in that: The second end of the top seat also has a second mounting surface; The first mounting surface and the second mounting surface are connected obliquely; The other end of the connecting rod can be selectively connected to the first mounting surface or the second mounting surface.

3. The turntable brake deviation detection device according to claim 2, characterized in that: The included angle between the first mounting surface and the second mounting surface is 135 degrees.

4. The turntable brake deviation detection device according to claim 1, characterized in that: The base and the top seat are connected via an adapter seat; There are multiple adapters, and the multiple adapters have different height specifications.

5. The turntable brake deviation detection device according to claim 1, characterized in that: Both ends of the base are provided with U-shaped holes; The U-shaped hole extends along the length direction of the base, and a step groove is provided in the hole wall of the U-shaped hole.

6. A detection method based on the turntable brake deviation detection device according to any one of claims 1 to 5, characterized in that: include: Obtain the first spherical center coordinates of the standard sphere when the turntable brake is in the first state; Obtain the second spherical center coordinates of the standard sphere when the turntable brake is in the second state; The spherical center offset of the standard sphere is calculated based on the first spherical center coordinates and the second spherical center coordinates.

7. The detection method according to claim 6, characterized in that: When the brake offset detection is performed on a single fourth-axis rotary table, it also includes: Adjust the angle of the connecting rod to ensure that the maximum diameter of the standard ball does not interfere with the projection of the connecting rod in the horizontal plane.

8. The detection method according to claim 6, characterized in that: When the brake offset detection is performed on the cantilever combined turntable, the obtaining of the second spherical center coordinates of the standard sphere when the turntable brake is in the second state includes: Obtain different values ​​of the second spherical center coordinates of the standard sphere when the fourth axis B-axis turntable brake and the fifth axis C-axis turntable brake are in the clamped or released state respectively; The fourth axis B axis turntable is respectively at 0 degree, +90 degrees and -90 degrees for detection, and when the fourth axis B axis turntable is at 0 degree, the fifth axis C axis turntable is detected every 90 degrees.

9. The detection method according to claim 6, characterized in that: When the brake offset detection is performed on the cradle-type combined turntable, the second spherical center coordinates of the standard sphere when the turntable brake is in the second state are obtained, including: Obtain different values ​​of the second sphere center coordinate when the fourth axis A-axis turntable brake is in a clamped or released state, and when the fifth axis is in a clamped or released state; The fourth axis A-axis turntable is respectively at 0 degrees, +90 degrees and -90 degrees for detection, and when the fourth axis A-axis turntable is at 0 degrees, the fifth axis C-axis turntable is detected every 90 degrees.

10. The detection method according to claim 6, characterized in that: The step of obtaining the first spherical center coordinates of a standard sphere when the turntable brake is in the first state comprises: Get the Z coordinate of the center of the sphere; Based on the Z coordinate of the sphere center, obtain the maximum diameter cross-section circle of the standard sphere; A plurality of evenly distributed measuring points are obtained based on the maximum diameter cross-sectional circle, and the XY coordinates of the plurality of measuring points are obtained, and the XY coordinates of the center of the sphere are calculated.

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