Aligning tool structure for A-axis precision of cradle type double-pendulum turntable five-axis machine tool

Abstract

The utility model discloses an A-axis precision alignment tool structure of a cradle type double-pendulum turntable five-axis machine tool, and belongs to the technical field of machinery. Comprising two sets of adjusting support assemblies, an inspection rod, an indicator and a cradle type double-pendulum rotary table, the cradle type double-pendulum rotary table comprises an A1-axis box body, a workbench, a C-axis box body and an A2-axis box body, the C-axis box body is supported between the A1-axis box body and the A2-axis box body, the workbench is installed on the C-axis box body, the left end and the right end of the C-axis box body are each provided with a through hole with the diameter being 30 mm, and the left end and the right end of the C-axis box body are each provided with a through hole with the diameter being 30 mm. The inspection rod is composed of three sections of shaft diameters, the diameter of the middle part is 36 mm, and the diameters of the two end parts are 32 mm. According to the utility model, the inspection rod is utilized to simulate the A-axis axis of the double-pendulum turntable, so that the A-axis axis is aligned to be parallel to the X-axis of the machine tool, and the device has the characteristics of simple operation and small error.

Description

Technical Field

[0001] The utility model relates to an A-axis precision alignment tool structure for a cradle-type double-swing turntable five-axis machine tool, belonging to the technical field of machinery. Background Art

[0002] The cradle-type double-pendulum turntable is a key core component of the five-axis linkage impeller machining center. It consists of a worktable rotary axis (C-axis) and a cradle swing axis (A-axis). It has a complex structure and requires high processing and assembly precision. Especially during the assembly process of the machine tool, when installing the cradle-type double-pendulum turntable component to the machine tool, it is necessary to align the A-axis of the double-pendulum turntable component with the X-axis of the machine tool's linear axis so that the five CNC coordinate axes of the machine tool (i.e., the linear motion axes X, Y, and Z axes and the rotation axes A and C axes) strictly meet the geometric position relationship of the Cartesian coordinate system. The assembly accuracy will directly affect the linkage processing accuracy of the five-axis machine tool. Therefore, how to quickly and accurately simulate the A-axis axis of the double-pendulum turntable through the inspection rod is crucial to achieving the overall assembly accuracy of the five-axis machine tool.

[0003] During the development of the five-axis linkage impeller machining center, a work table was used instead of the A-axis axis. The work table was adjusted to the horizontal and vertical positions respectively, and then the X-axis of the machine tool was aligned parallel to the work table to achieve the installation and alignment of the double-swing turntable. Although this method is simple to operate and easy to adjust, there are measurement errors. The parallelism error between the work table and the A-axis axis is not included in the measurement results, which affects the assembly accuracy of the machine tool. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a cradle-type double-swing turntable five-axis machine tool A-axis precision alignment fixture structure.

[0005] A cradle-type double-pendulum turntable five-axis machine tool A-axis precision alignment fixture structure, including two sets of adjustment bracket assemblies, a test rod, an indicator and a cradle-type double-pendulum turntable, the cradle-type double-pendulum turntable includes an A1 axis box, a workbench, a C axis box and an A2 axis box, the C axis box is supported between the A1 axis box and the A2 axis box, the workbench is installed on the C axis box, the left and right ends of the C axis box are respectively processed with a through hole with a diameter of 30mm, the through hole is coaxial with the A axis axis of the double-pendulum turntable, the test rod consists of three sections of shaft diameter, the middle part has a diameter of 36mm, and the two end parts have a diameter of 32mm, the indicator includes a micrometer, a dial indicator, a dial rod and a magnetic base, the indicator is connected to the components of the alignment fixture structure through the magnetic base, the adjustment bracket assemblies are respectively installed at the left and right ends of the C axis box, the test rod is installed between the two sets of adjustment bracket assemblies, the adjustment bracket assembly includes a tightening block and a tightening screw , adjusting bracket, limit screw and adjusting screw, the adjusting bracket is connected with the limit screw and the inspection rod respectively, the axial hole of the adjusting bracket is connected with the tightening screw through a washer, the tightening screw is connected with the tightening block, the tightening block is connected with the tightening sleeve, the tightening sleeve is connected with the C-axis box, the outer cylindrical surface of the expansion sleeve, the screw countersunk hole of the adjusting bracket, the conical inner hole of the expansion sleeve and the radial slot of the expansion sleeve, the outer cylindrical surface and the conical inner hole are coaxially arranged, the expansion sleeve is divided into six equal parts by the radial slot, the axis of the limit screw hole and the mounting hole intersect perpendicularly and are connected to each other; there are four adjusting screw holes, which are evenly distributed at 90° intervals, intersect perpendicularly with the axis of the mounting hole, and are connected to each other, the expansion block has an outer conical surface and a threaded through hole, the expansion block is installed in the adjusting bracket, the outer conical surface of the expansion block matches the conical inner hole of the adjusting bracket, the expansion screw passes through the screw countersunk hole of the adjusting bracket and is screwed into the threaded through hole of the expansion block.

[0006] The magnetic base of the indicator is fixed on the A1 shaft box or the A2 shaft box.

[0007] The advantage of this utility model is that during the final assembly of a cradle-type double-swing turntable five-axis machine tool, the A-axis axis of the double-swing turntable is simulated using a test rod, thereby aligning the A-axis axis with the machine tool's X-axis. This simple operation and low error rate improve machine tool assembly accuracy compared to existing technologies, avoiding indirect measurement errors. Furthermore, the inspection fixture of this utility model can also be used to inspect the perpendicularity of the A-axis and C-axis of the double-swing turntable components, as well as the parallelism of the A-axis and the work surface.

[0008] The utility model can quickly and accurately simulate the A-axis axis of the double-swing turntable to ensure the assembly accuracy of the machine tool. The A-axis alignment fixture in the utility model can also be used to detect the verticality of the A-axis and the C-axis and the parallelism of the A-axis and the work table during the assembly process of the double-swing turntable components.

[0009] This utility model utilizes a test rod to simulate the A-axis of the double-swing turntable. During the machine tool assembly process, by aligning the test rod parallel to the machine tool's X-axis, the double-swing turntable components can be accurately installed and aligned on the machine tool. This method is simple to operate and minimizes errors. Compared to existing technologies, it can improve machine tool assembly accuracy and avoid indirect measurement errors. Furthermore, during the assembly of the double-swing turntable components, the aforementioned method can accurately align the perpendicularity of the A-axis and the C-axis, as well as the parallelism of the A-axis and the work surface, thereby improving the assembly accuracy of key functional components. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] When considered in conjunction with the accompanying drawings, the present invention can be more completely and better understood and its many attendant advantages can be easily known by referring to the detailed description below. However, the drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention, as shown in the figure:

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] Figure 2 This is a schematic structural diagram of the adjustment bracket assembly of the present utility model.

[0013] Figure 3 This is a schematic diagram of the structure of the adjustment bracket parts of the utility model.

[0014] Figure 4 This is a side schematic diagram of the adjustment bracket component structure of the utility model.

[0015] Figure 5 This is a schematic diagram of the structure of the expansion block parts of the utility model.

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0017] Obviously, many modifications and changes made by those skilled in the art based on the purpose of the present invention fall within the protection scope of the present invention.

[0018] Those skilled in the art will understand that unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by those skilled in the art.

[0019] Example 1: Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, a cradle-type double-pendulum turntable five-axis machine tool A-axis accuracy alignment fixture structure includes two sets of adjustment bracket assemblies 1, a test rod 2, an indicator 3 and a cradle-type double-pendulum turntable.

[0020] The cradle-style double-swing turntable comprises an A1-axis housing 4, a worktable 5, a C-axis housing 6, and an A2-axis housing 7. The C-axis housing 6 is supported between the A1-axis housing 4 and the A2-axis housing 7 and, driven by a transmission mechanism, oscillates about the A-axis axis. The worktable 5 is mounted on the C-axis housing 6 and, driven by the transmission mechanism, rotates continuously about the C-axis axis.

[0021] A through hole with a diameter of 30 mm is processed at the left and right ends of the C-axis box 6. The through hole is coaxial with the A-axis axis of the double-swing turntable and is used to install the adjustment bracket assembly 1. After the machine tool is assembled and inspected, the through hole is sealed with a special plug.

[0022] The inspection rod 2 consists of three sections of shaft diameter. The diameter of the middle section is 36mm, which is the working shaft diameter of the inspection rod; the diameter of the two end sections is 32mm, which is used for the installation and alignment of the inspection rod.

[0023] The indicator 3 includes a micrometer, a dial indicator, a dial rod and a magnetic base. The indicator 3 is connected to the components of the alignment fixture structure through the magnetic base and is used to detect and align the inspection rod 2 to be coaxial with the A-axis of the double pendulum turntable.

[0024] like Figure 1 As shown, there are two sets of adjustment bracket assemblies 1, which are respectively installed at the left and right ends of the C-axis box 6. The inspection rod 2 is installed between the two sets of adjustment bracket assemblies 1. The adjustment bracket assembly 1 is used to support and align the inspection rod 2 to be coaxial with the A-axis axis.

[0025] like Figure 2 、 Figure 3 and Figure 4 As shown, the adjustment bracket assembly 1 includes a tightening block 11, a tightening screw 12, an adjustment bracket 13, a limit screw 14 and an adjusting screw 15. The adjustment bracket 13 is respectively connected to the adjustment bracket 13, the limit screw 14 and the inspection rod 2. The axial hole of the adjustment bracket 13 is connected to the tightening screw 12 through a washer. The tightening screw 12 is connected to the tightening block 11, the tightening block 11 is connected to the tightening sleeve, and the tightening sleeve is connected to the C-axis box 6. The other end of the inspection rod 2 has the same connection structure with the C-axis box 6, wherein there are 4 adjusting screws 15 at both ends, which are evenly distributed on the adjustment bracket 13 at 90° intervals along the circumferential direction.

[0026] The adjustment bracket 13 is divided into a mounting portion and an adjustment portion, both of which are integrally formed. The mounting portion includes the outer cylindrical surface 21 of the expansion sleeve, the screw countersunk hole 25 of the adjustment bracket 13, the conical inner hole 26 of the expansion sleeve, and the radial slot 27 of the expansion sleeve. The outer cylindrical surface 21 and the conical inner hole 26 are coaxially arranged, and the expansion sleeve is divided into six equal parts by the radial slot 27. Under the extrusion force of the internal conical surface, the outer cylindrical surface 21 can expand outward. The adjustment portion includes the limit screw hole 22 of the adjustment bracket 13, the adjustment screw hole 23, and the mounting hole 24. The axes of the limit screw hole 22 and the mounting hole 24 intersect perpendicularly and are interconnected. There are four adjustment screw holes 23, evenly spaced at 90° intervals, intersecting perpendicularly with the axis of the mounting hole 24 and interconnected.

[0027] like Figure 5 As shown, the expansion piece 11 has an outer conical surface 31 and a threaded through hole 32.

[0028] like Figure 2 As shown, the expansion block 11 is installed in the adjustment bracket 13. The outer conical surface 31 of the expansion block 11 cooperates with the conical inner hole 26 of the adjustment bracket 13. The expansion screw 12 passes through the screw countersunk hole 25 of the adjustment bracket 13 and is screwed into the threaded through hole 32 of the expansion block 11. By tightening the expansion screw 12, the expansion block 11 moves to the right, squeezing the conical inner hole 26 of the adjustment bracket 13, causing the outer diameter of the outer cylindrical surface 21 to expand and tighten in the mounting hole of the C-axis box 6, so that the adjustment bracket 13 is fixed to the C-axis box 6. Insert the mounting shaft diameters at both ends of the test rod 2 into the mounting holes 24 of the adjustment bracket 13, and tighten the four adjustment screws 15 to make contact with the mounting shaft diameter of the test rod 2. Screw the limit screw 14 into the limit screw hole 22 of the adjustment bracket 13 so that the test rod 2 cannot move freely along the axial direction, preventing the test rod 2 from slipping out of the mounting hole 24 of the adjustment bracket 13. The magnetic base of the indicator 3 is fixed on the A1 axis box 4 or the A2 axis box 7, and the measuring needle is respectively hit on the two ends of the working axis diameter of the inspection rod 2. The A axis is swung to make the inspection rod 2 rotate with the C axis box 6. By tightening the adjustment screw 15, the radial runout of the two ends of the inspection rod 2 is respectively aligned to 0.002mm, so that the inspection rod 2 is coaxial with the A axis axis of the double pendulum turntable.

[0029] Example 2: Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, a cradle-type double-pendulum turntable five-axis machine tool A-axis accuracy alignment fixture structure includes a double-pendulum turntable, a test rod and an indicator.

[0030] The A-axis precision alignment fixture structure of the cradle-type double-pendulum turntable five-axis machine tool also includes two sets of adjustment bracket assemblies. The adjustment bracket assemblies are installed in the through holes on the left and right ends of the C-axis box through an expansion mechanism. The adjustment brackets are fixed to the C-axis box by tightening the expansion screws. The inspection rod is installed between the two sets of adjustment brackets. The two ends of the inspection rod are respectively inserted into the mounting holes of the two sets of adjustment brackets. The four adjustment screws are tightened and pressed against the mounting shaft diameters at both ends of the inspection rod. The axial movement of the inspection rod is limited by the limit screws on the adjustment bracket to prevent it from slipping out of the adjustment bracket. The indicator is used to measure the radial runout value at both ends of the inspection rod. By adjusting the four adjustment screws on the bracket, the two ends of the inspection rod are aligned with the A-axis axis. The inspection rod can then be used to simulate the spatial position of the A-axis axis of the double-pendulum turntable. By aligning the inspection rod parallel to the X-axis of the machine tool, the assembly accuracy of the double-pendulum turntable on the machine tool is guaranteed.

[0031] The C-axis housing of the cradle-type double-pendulum turntable has a through-hole on each end, which is coaxial with the A-axis axis of the double-pendulum turntable. Two sets of adjustment bracket assemblies are installed in the through-holes on the left and right ends of the C-axis housing through an expansion mechanism. Tighten the expansion screws to secure the adjustment bracket to the C-axis housing. Insert the two ends of the inspection rod into the mounting holes of the two sets of adjustment brackets and screw in the limit screws to prevent the inspection rod from moving freely along the axis, thereby preventing it from slipping out of the adjustment bracket during the inspection process. Then tighten the four adjustment screws on the adjustment bracket to press against the mounting shaft diameter at both ends of the inspection rod to secure the inspection rod. Fix the magnetic base of the indicator to the stationary A-axis housing on both sides, and hit the measuring needle on both ends of the inspection rod. Swing the A-axis to make the inspection rod rotate with the C-axis housing. Use the four adjustment screws to align the inspection rod with the A-axis axis of the double-pendulum turntable. The inspection rod can then be used to simulate the A-axis axis. During machine tool assembly, the double-swing turntable can be precisely assembled and aligned on the machine tool by ensuring the alignment of the test rod with the machine's X-axis. This method is simple to operate and minimizes errors. Furthermore, during the assembly of the double-swing turntable's components, the aforementioned method can be used to test the perpendicularity of the A- and C-axes, as well as the parallelism of the A-axis and the worktable, ensuring the assembly accuracy of key functional components.

[0032] Example 3: Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, a cradle-type double-pendulum turntable five-axis machine tool A-axis precision alignment fixture structure includes an inspection rod, an adjustment bracket assembly and an indicator. The diameter of the middle part of the inspection rod is 36mm, which is the working axis diameter of the inspection rod, and the diameter of both ends is 32mm, which is the installation adjustment axis diameter of the inspection rod. There are two sets of adjustment bracket assemblies, including adjustment brackets, expansion blocks, expansion screws, limit screws and adjustment screws. The indicator includes a micrometer, a dial indicator, a gauge rod and a magnetic base. The left and right ends of the C-axis box of the cradle-type double-pendulum turntable are each machined with a through hole with a diameter of 30mm, which is coaxial with the A-axis axis of the double-pendulum turntable. The two sets of adjustment bracket assemblies are respectively installed in the through holes with a diameter of 30mm at the left and right ends of the C-axis box through an expansion mechanism. By tightening the expansion screws, the adjustment brackets are fixed to the two ends of the C-axis box. The test rod is installed between two sets of adjustment brackets. The limit screws prevent the test rod from moving freely along the axis. Tighten the four adjustment screws on the adjustment bracket and press them against the mounting shaft diameters at both ends of the test rod to fix the test rod. Install the indicator and hit the needle on both ends of the working shaft diameter of the test rod. Swing the A-axis to make the test rod rotate with the C-axis box. Check the radial runout at both ends of the test rod. Align the test rod with the A-axis axis of the double pendulum turntable. The coaxiality requirement is 0.002mm. The A-axis axis can be simulated using the test rod.

[0033] As described above, the embodiments of the present invention have been described in detail. However, it is obvious to those skilled in the art that many variations are possible without departing from the inventive concept and effects of the present invention. Therefore, all such variations are included within the scope of protection of the present invention.

Claims

1. A cradle-type double-swing turntable five-axis machine tool A-axis precision alignment fixture structure, characterized in that: Includes two sets of adjustment bracket assemblies, inspection rods, indicators and a cradle-type double-pendulum turntable. The cradle-type double-swing turntable includes an A1-axis box, a workbench, a C-axis box, and an A2-axis box. The C-axis box is supported between the A1-axis box and the A2-axis box, and the workbench is installed on the C-axis box. There is a through hole with a diameter of 30mm on each end of the C-axis box. The through hole is coaxial with the A-axis axis of the double pendulum turntable. The test rod consists of three sections of shaft diameter, the middle section has a diameter of 36mm, and the two end sections have a diameter of 32mm. The indicator includes a dial indicator, a vernier indicator, a dial rod and a magnetic base. The indicator is connected to the components of the alignment fixture structure through the magnetic base. The adjustment bracket assemblies are installed on the left and right ends of the C-axis box respectively, and the inspection rod is installed between the two sets of adjustment bracket assemblies. The adjustment bracket assembly includes a tightening block, an expansion screw, an adjustment bracket, a limit screw and an adjustment screw. The adjustment bracket is connected to the limit screw and the inspection rod respectively. The axial hole of the adjustment bracket is connected to the tightening screw through a washer. The tightening screw is connected to the tightening block, the tightening block is connected to the expansion sleeve, and the expansion sleeve is connected to the C-axis box. The outer cylindrical surface of the expansion sleeve, the screw countersunk hole of the adjustment bracket, the conical inner hole of the expansion sleeve and the radial slot of the expansion sleeve are coaxially arranged. The expansion sleeve is divided into six equal parts by the radial slot. The axis of the limit screw hole and the mounting hole intersect perpendicularly and are interconnected. There are four adjusting screw holes, evenly distributed at 90° intervals, intersecting perpendicularly with the axis of the mounting hole and interconnected. The expansion block has an outer conical surface and a threaded through hole. The expansion block is installed in the adjustment bracket. The outer conical surface of the expansion block matches the conical inner hole of the adjustment bracket. The expansion screw passes through the screw countersunk hole of the adjustment bracket and is screwed into the threaded through hole of the expansion block.

2. The cradle-type double-swing turntable five-axis machine tool A-axis precision alignment fixture structure according to claim 1 is characterized in that: The magnetic base of the indicator is fixed on the A1 shaft box or the A2 shaft box.

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