A coaxiality checking fixture for a five-axis rotary table

Abstract

The utility model provides a kind of coaxiality verification fixture of five-axis rotary table, including left and right swing arm, work rotary table and the verification fixture installed on work rotary table, the verification fixture is constituted by base with coaxial double clamping hole and calibration mandrel;When verifying, the base of verification fixture is fixedly installed on work rotary table, positioning is carried out using its coaxial double clamping hole, and the radial runout of calibration mandrel is detected to realize coaxiality verification;The equipment is simple and compact in structure, convenient to operate, and the radial runout of calibration mandrel is directly detected, so that the coaxiality of left and right swing arm and work rotary table of five-axis rotary table can be efficiently, intuitively and accurately verified.

Description

Technical Field

[0001] This utility model relates to the field of five-axis rotary table technology, and more specifically, to a five-axis rotary table coaxiality verification fixture. Background Technology

[0002] As the manufacturing industry develops towards high speed, high precision, and multi-functionality, the five-axis rotary table, as a core component of CNC machine tools, determines the positioning accuracy, motion stability, and final product quality of the machining equipment through its coaxiality accuracy.

[0003] Existing technologies, such as patent CN119879692A, propose a method for detecting the radial runout of the large gear ring of a gear-ring rotary table. This method involves selecting a fixture with acceptable precision and testing the coaxiality of the fixture and bearing, the worktable and fixture, the large gear ring and the worktable, and the worktable and rotary table base step by step. This gradually controls the assembly precision and ensures the radial runout accuracy of the large gear ring after installation. However, this method lacks clear radial and axial positioning references, and the fixture is prone to offset due to assembly clearance. Furthermore, the fixture design is mostly for a single specification of worktable or large gear ring shaft and cannot be universally applied.

[0004] Therefore, there is an urgent need for a five-axis rotary table coaxiality calibration fixture with dual locating holes. The dual locating holes can be used to position rotating shafts of different specifications to achieve precise radial and axial positioning. The fixture also has a waist-shaped hole to flexibly adjust the installation position, thus meeting the requirements for more efficient and accurate coaxiality calibration. Utility Model Content

[0005] The purpose of this invention is to provide a five-axis turntable coaxiality verification fixture, which achieves coaxiality verification by detecting and calibrating the radial runout of the spindle 32, and efficiently, intuitively and accurately completes the coaxiality verification of the left and right swing arms 1 and the worktable 2 of the five-axis turntable.

[0006] A five-axis rotary table coaxiality calibration fixture includes left and right swing arms 1, a worktable 2, and a calibration fixture 3 mounted thereon during calibration. The calibration fixture 3 includes a base 31 with coaxial double clasp holes and a calibration mandrel 32. Coaxiality calibration is achieved by detecting the radial runout of the calibration mandrel 32.

[0007] Furthermore, the base 31 is provided with a first locking hole 71 and a second locking hole 72, which are arranged at the same center and the diameter of the first locking hole 71 is smaller than that of the second locking hole 72. When the calibration fixture calibrates the left and right swing arms 1, the first locking hole 71 is used to lock the swing arm rotating shaft 81. When the calibration fixture calibrates the worktable 2, the second locking hole 72 is used to lock the worktable rotating shaft 82.

[0008] Furthermore, both the first locking hole 71 and the second locking hole 72 are hollow annular structures, which are respectively matched with the annular locking block shapes of the swing arm rotating shaft 81 and the worktable rotating shaft 82 to achieve radial positioning.

[0009] Furthermore, the top of the snap-fit ​​block of the worktable pivot 82 and the swing arm pivot 81 abuts against the bottom of the base 31 to form an axial positioning surface.

[0010] Furthermore, the base 31 is provided with a plurality of waist-shaped mounting holes 33 surrounding the calibration mandrel 32 for adjusting the mounting position of the fixture on the rotating shaft.

[0011] Furthermore, the waist-shaped mounting hole 33 corresponds to the screw hole on the rotating shaft body, and the fixture and the rotating shaft are rotated synchronously by fasteners.

[0012] Furthermore, when calibrating the left and right swing arms 1, radial runout is detected on the calibration mandrel 32 of the calibration fixture 3, and the runout value is measured by a magnetic dial indicator until the difference is at the micrometer level to control the coaxiality.

[0013] Furthermore, the height of the swing arm pivot 81 of the left and right swing arms 1 is adjusted by the bottom pad 10, and the worktable pivot 82 of the worktable 2 is adjusted for precision by fine-tuning the installation position.

[0014] The beneficial effects of this utility model are as follows: A five-axis rotary table coaxiality calibration fixture includes left and right swing arms 1, a worktable 2, and a calibration fixture 3 installed on them during calibration; its first locking hole 71 and second locking hole 72, combined with the waist-shaped mounting hole 33, enable the fixture to efficiently and compatiblely calibrate the left and right swing arms 1 and the worktable 2; at the same time, the hollow annular structure of the double locking holes matches the shape of the annular locking block of the rotating shaft, and combined with the axial positioning surface formed by the top of the locking block and the bottom of the base 31, it achieves gapless radial and axial dual positioning, ensuring the stability of the detection benchmark of the calibration mandrel 32; and combined with the height adjustment of the bottom pad block 10 of the swing arm rotating shaft 81 and the installation position adjustment function of the worktable rotating shaft 82, it can quickly locate the source of deviation and guide the machine adjustment, shortening maintenance time; further, it can efficiently, intuitively, and accurately complete the coaxiality calibration of the left and right swing arms 1 and the worktable 2 of the five-axis rotary table. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a five-axis rotary table coaxiality calibration fixture according to the present invention.

[0016] Figure 2 This is a schematic cross-sectional view of a five-axis rotary table coaxiality verification fixture according to the present invention.

[0017] Figure 3 This is a schematic cross-sectional view of the left and right swing arms of a five-axis rotary table coaxiality verification fixture according to this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of a five-axis rotary table coaxiality calibration fixture according to the present invention.

[0019] Explanation of main component symbols

[0020] Left and right swing arms 1, worktable 2, calibration fixture 3, base 31, calibration spindle 32, waist-shaped mounting hole 33, first clasp hole 71, second clasp hole 72, swing arm pivot 81, worktable pivot 82, bottom pad 10.

[0021] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0022] The following embodiments are described to aid in understanding this application. These embodiments are not, and should not be construed as, limiting the scope of protection of this application.

[0023] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as individual functional units (which may include subunits), but those skilled in the art will recognize that various components or portions thereof may be divided into individual components or may be integrated together (including integrated within a single system or component).

[0024] Furthermore, the connection between components or systems is not intended to be limited to a direct connection; on the contrary, data between these components may be modified, reformatted, or otherwise altered by intermediate components. Additionally, other or fewer connections may be used. It should also be noted that the terms "connection," "link," or "input" should be understood to include direct connections, indirect connections via one or more intermediate devices, and wireless connections. Example 1:

[0025] like Figure 1 The diagram shown is a schematic representation of the overall structure of a five-axis rotary table coaxiality calibration fixture according to this utility model; Figure 2 The image shown is a schematic cross-sectional view of a five-axis rotary table coaxiality calibration fixture according to this utility model; Figure 3 The image shown is a schematic cross-sectional view of the left and right swing arms of a five-axis rotary table coaxiality calibration fixture according to this utility model; Figure 4 The diagram shown is a schematic diagram of the structure of a five-axis rotary table coaxiality verification fixture according to this utility model.

[0026] A five-axis rotary table coaxiality calibration fixture includes left and right swing arms 1, a worktable 2, and a calibration fixture 3 mounted thereon during calibration. The calibration fixture 3 includes a base 31 with coaxial double locating holes and a calibration mandrel 32. Coaxiality calibration is achieved by detecting the radial runout of the calibration mandrel 32. By integrating the base 31 with coaxial double locating holes and the calibration mandrel 32, a single fixture can simultaneously adapt to the coaxiality calibration of the left and right swing arms and the worktable of the five-axis rotary table, simplifying the operation process and reducing fixture costs. Furthermore, the radial runout detection of the calibration mandrel 32 provides a direct quantitative indicator, ensuring calibration accuracy.

[0027] The base 31 is provided with a first locking hole 71 and a second locking hole 72, both concentrically arranged, with the diameter of the first locking hole 71 being smaller than that of the second locking hole 72. When the calibration fixture calibrates the left and right swing arms 1, the first locking hole 71 is used to engage the swing arm pivot 81; when the calibration fixture calibrates the worktable 2, the second locking hole 72 is used to engage the worktable pivot 82. The dual locking hole design provides functional compatibility and improves calibration efficiency. Both the first locking hole 71 and the second locking hole 72 are hollow annular structures, respectively matching the shape of the annular locking blocks of the swing arm pivot 81 and the worktable pivot 82 to achieve radial positioning. The shape matching design of the locking holes and the annular locking blocks of the pivots ensures that the fixture and the pivots achieve precise radial positioning during calibration, eliminating the interference of installation gaps on runout detection. The top of the locking blocks of the worktable pivot 82 and the swing arm pivot 81 abuts against the bottom of the base 31, forming an axial positioning surface; this restricts the axial displacement of the fixture and avoids distortion of radial runout data caused by axial movement during calibration.

[0028] The base 31 is provided with multiple waist-shaped mounting holes 33 surrounding the calibration mandrel 32 for adjusting the installation position of the fixture on the rotating shaft. The waist-shaped mounting holes 33 correspond to the screw holes on the rotating shaft body, and the fixture and the rotating shaft are rotated synchronously by fasteners. The waist-shaped mounting holes 33 are fastened in conjunction with the screw holes to achieve rigid synchronous rotation of the fixture and the rotating shaft, preventing the fixture from slipping or shifting during the calibration process, and ensuring that the runout test data truly reflects the motion state of the rotating shaft.

[0029] When calibrating the left and right swing arms 1, radial runout is detected on the calibration mandrel 32 of the calibration fixture 3. The runout value is measured with a magnetic dial indicator until the difference is at the micrometer level to control coaxiality. The height of the swing arm pivot 81 of the left and right swing arms 1 is adjusted by the bottom pad 10, and the worktable pivot 82 of the worktable 2 is adjusted for precision by fine-tuning the installation position, thereby achieving dynamic matching of the pivot spatial position.

[0030] The beneficial effects of this utility model are as follows: A five-axis rotary table coaxiality calibration fixture includes left and right swing arms 1, a worktable 2, and a calibration fixture 3 installed on them during calibration; its first locking hole 71 and second locking hole 72, combined with the waist-shaped mounting hole 33, enable the fixture to efficiently and compatiblely calibrate the left and right swing arms 1 and the worktable 2; at the same time, the hollow annular structure of the double locking holes matches the shape of the annular locking block of the rotating shaft, and combined with the axial positioning surface formed by the top of the locking block and the bottom of the base 31, it achieves gapless radial and axial dual positioning, ensuring the stability of the detection benchmark of the calibration mandrel 32; and combined with the height adjustment of the bottom pad block 10 of the swing arm rotating shaft 81 and the installation position adjustment function of the worktable rotating shaft 82, it can quickly locate the source of deviation and guide the machine adjustment, shortening maintenance time; further, it can efficiently, intuitively, and accurately complete the coaxiality calibration of the left and right swing arms 1 and the worktable 2 of the five-axis rotary table.

[0031] Although this application discloses several aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art. Various modifications and improvements can be made without departing from the concept of this application, and these all fall within the scope of protection of this application. The various aspects and embodiments disclosed in this application are for illustrative purposes only and are not intended to limit this application. The actual scope of protection of this application is determined by the claims.

Claims

1. A coaxiality checking fixture for a five-axis rotary table, characterized by: It includes left and right swing arms (1), worktable (2) and calibration fixture (3) installed on it during calibration. The calibration fixture (3) includes a base (31) with coaxial double clasp holes and a calibration mandrel (32). Coaxiality calibration is achieved by detecting the radial runout of the calibration mandrel (32).

2. The five-axis rotary table coaxiality verification fixture as described in claim 1, characterized in that: The base (31) is provided with a first locking hole (71) and a second locking hole (72), which are arranged at the same center and the diameter of the first locking hole (71) is smaller than that of the second locking hole (72). When the calibration fixture (3) calibrates the left and right swing arms (1), the first locking hole (71) is used to lock the swing arm shaft (81). When the calibration fixture (3) calibrates the worktable (2), the second locking hole (72) is used to lock the worktable shaft (82).

3. The five-axis rotary table coaxiality verification fixture as described in claim 2, characterized in that: The first locking hole (71) and the second locking hole (72) are both hollow annular structures, which are matched with the annular locking block shapes of the swing arm pivot (81) and the worktable pivot (82) respectively to achieve radial positioning.

4. The five-axis rotary table coaxiality verification fixture as described in claim 3, characterized in that: The top of the snap-fit ​​block of the worktable pivot (82) and the swing arm pivot (81) abuts against the bottom of the base (31) to form an axial positioning surface.

5. The five-axis rotary table coaxiality verification fixture as described in claim 2, characterized in that: The base (31) is provided with a plurality of waist-shaped mounting holes (33) surrounding the calibration mandrel (32) for adjusting the mounting position of the fixture on the rotating shaft.

6. The five-axis rotary table coaxiality verification fixture as described in claim 5, characterized in that: The waist-shaped mounting hole (33) corresponds to the screw hole on the rotating shaft body, and the fixture and the rotating shaft are rotated synchronously by fasteners.

7. The five-axis rotary table coaxiality calibration fixture as described in claim 1, characterized in that: When calibrating the left and right swing arms (1), radial runout is detected on the calibration mandrel (32) of the calibration fixture (3), and the runout value is measured by a magnetic dial indicator until the difference is at the micrometer level to control the coaxiality.

8. The five-axis rotary table coaxiality verification fixture as described in claim 1, characterized in that: The height of the swing arm pivot (81) of the left and right swing arms (1) is adjusted by the bottom pad (10), and the worktable pivot (82) of the worktable (2) is adjusted for precision by fine-tuning the installation position.

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