Z-axis machining device

Abstract

A Z-axis machining apparatus includes: a base; a linear motor connected to the base; and a machining spindle adapted to be driven by the linear motor to generate Z-axis displacement relative to the base; wherein a flexible coupling assembly is provided between the machining spindle and the linear motor, the flexible coupling assembly having elastic deformation in both the radial and axial directions of the machining spindle.

Claims

1. A Z-axis machining apparatus, comprising: a base; a linear motor connected to the base; a machining spindle adapted to be driven by the linear motor to generate Z-axis displacement relative to the base; and a flexible coupling assembly located between the machining spindle and the linear motor, the flexible coupling assembly having elastic deformation in both the radial and axial directions of the machining spindle.

2. The Z-axis machining apparatus as described in claim 1, wherein, The linear motor includes a stator and a mover. The stator has two magnetic surfaces arranged opposite each other in a horizontal direction, and the mover is located between the two magnetic surfaces.

3. The Z-axis machining apparatus as described in claim 2, wherein, The two sides of the mover extend out of the stator and are respectively connected to a slide rail assembly. The two slide rail assemblies are connected to a back plate of the base. An extension plate is provided between the mover and the two slide rail assemblies. Each extension plate extends along the Z-axis and is used for the upper end of the flexible connection assembly to be assembled and connected. The lower end of the flexible connection assembly is used for the machining spindle to be assembled and connected.

4. The Z-axis machining apparatus as described in claim 3, wherein, The flexible connection assembly includes an upper connector, a lower connector, and a flexible rod. The upper connector is connected to the two extension plates, the lower connector is connected to the machining spindle, and the flexible rod is connected to the upper connector and the lower connector at both ends.

5. The Z-axis machining apparatus as described in claim 4, wherein, The flexible rod is made of A7075 aluminum alloy.

6. The Z-axis machining apparatus as described in claim 4, wherein, The flexible rod has two end blocks that are respectively connected to the two ends of a core rod, and the two end blocks are respectively connected to the upper connector and the lower connector.

7. The Z-axis machining apparatus as described in claim 6, wherein, The central axis of the flexible rod coincides with the line of action of the thrust of the linear motor and the axis of the machining spindle.

8. The Z-axis machining apparatus as described in claim 7, wherein, The core rod extends axially along the Z-axis, and the cross-sectional area of ​​the core rod is smaller than the cross-sectional area of ​​each end block.

9. The Z-axis machining apparatus as described in claim 7, wherein, The flexible rod has an elastic modulus of 60–80 GPa, a core rod diameter of 2–3 mm, and a length of 25–35 mm.

10. The Z-axis machining apparatus as described in claim 7, wherein, The upper connector and the lower connector each include an assembly block and a fixing block. The assembly block of the upper connector is connected to the two extension plates, and the assembly block of the lower connector is connected to the machining spindle. At least one of the corresponding assembly block and the fixing block is provided with a transverse elongated hole extending along the X-axis and a rod hole extending along the Z-axis. The two end blocks are respectively inserted into the transverse elongated holes of the upper connector and the lower connector. The core rod is partially located in the rod hole of the upper connector and the lower connector. The assembly block of the upper connector is connected to the fixing block, and the assembly block of the lower connector is connected to the fixing block.

11. The Z-axis machining apparatus as described in claim 10, wherein, The length of the transverse holes of the upper connector and the lower connector in the X-axis direction is greater than the length of the end block in the X-axis direction.

12. The Z-axis machining apparatus as described in claim 10, wherein, The two end blocks respectively form an interference fit with the transverse elongated holes of the upper connector and the lower connector in the Y-axis direction.

13. The Z-axis machining apparatus as described in claim 10, wherein, At least one of the front and rear surfaces of the two-end block in the Y-axis direction forms a plane.

14. The Z-axis machining apparatus as described in claim 2, wherein, The two magnetic surfaces are opposite each other along the Y-axis. The mover extends out of the stator on both sides along the X-axis and is connected to a slide rail assembly. The two slide rail assemblies are connected to a back plate of the base.

15. The Z-axis machining apparatus as described in claim 1, wherein, The line of action of the linear motor and the axis of the machining spindle both extend along the Z-axis and coincide with each other.

16. The Z-axis machining apparatus as described in claim 1, further comprising a bushing through which the machining spindle passes.

17. The Z-axis machining apparatus as described in claim 16, wherein, The bushing is an air-float type bushing.

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