A double-layer structure inclined bed of a turning center and its manufacturing method

A double-layer structure and turning center technology, which is applied in the field of machine tools, can solve the problems that the bed affects the machining accuracy and the bed is easy to deform, and achieves the effect of stable overall structure, strong rigidity, good bending and torsional rigidity

Active Publication Date: 2018-03-16
JIANGSU YUANLI AVIA PRECISION MACHINE TOOL
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the existing machine tool is easy to vibrate due to the over-rigidity of the bed during high-speed operation and affects the machining accuracy, and the bed is easily deformed under high-frequency vibration, the invention provides a double-layer structure inclined bed of the turning center The invention and its manufacturing method can effectively reduce the vibration of the machine tool, ensure the machining accuracy of the machine tool, improve the bending and torsion resistance, and prolong the service life of the machine tool

Method used

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  • A double-layer structure inclined bed of a turning center and its manufacturing method
  • A double-layer structure inclined bed of a turning center and its manufacturing method
  • A double-layer structure inclined bed of a turning center and its manufacturing method

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Effect test

Embodiment 1

[0045] Such as figure 1 and figure 2As shown, a double-layer structure inclined bed of a turning center includes an upper bed and a lower bed. The upper bed is an inclined bed, and the inclined bed includes an outer frame 1, a cylinder 2 and a transverse partition 3; The cross section of 1 is an isosceles right triangle; the cylinder 2 is arranged inside the outer frame 1; the central axis of the cylinder 2 passes through the center of gravity of the cross section triangle of the outer frame 1; the outer diameter of the cylinder 2 is D t ,D t The size satisfies the following relationship:

[0046]

[0047] Where: D t is the outer diameter of the cylinder, T is the torque generated by the cutting force, ρ is the ratio of the inner and outer diameters of the cylinder 2 section, [τ] is the allowable shear stress of the cylinder section; [τ]=(0.8~1.0 )〔σ〕;〔σ〕is the allowable tensile stress of the material; the material of the inclined bed (including the cylinder and the pa...

Embodiment 2

[0069] Same as Embodiment 1, the difference is: In order to further improve the overall rigidity of the bed and reduce the cutting force generated by the moving saddle to the inclined bed, in this embodiment the distance between the transverse partitions 3 is set to be the distance between the moving saddle 4, which ensures that there are always at least two transverse partition rib structures at the bottom of the mobile saddle, providing support for the mobile saddle bearing the cutting force, decomposing the cutting force, and further reducing the cutting force. Distortion of machine tool contours due to torsional deformation of large parts.

Embodiment 3

[0071] Same as Embodiment 2, except that the projected area of ​​the lower part of the bed is larger than and covers the projected area of ​​the upper spindle of the bed.

[0072] On the one hand, this setting considers that it is more convenient for the staff to load and unload the workpiece. On the other hand, when the machine tool spindle as the force point falls within the lower part of the bed as the support surface, no overturning force will be generated when the external force is applied. , the overall structure is more stable.

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Abstract

The invention discloses a double-layer slant lathe body of a turning center and a manufacturing method for the slant lathe body, belongs to the field of machine tools, and solves the problems that an existing machine tool easily vibrates due to excessive rigidity of a tool body in a high-speed running process to influence the machining precision, and the tool body easily deforms under high-frequency vibration. The double-layer slant lathe body comprises an upper lathe body part and a lower lathe body part, wherein the upper lathe body part is a slant lathe body; the slant lathe body comprises an outer frame, a cylinder and transverse partitions; the cross section of the outer frame is triangular; the cylinder is arranged in the outer frame; and the outer frame is fixedly connected with the cylinder through the transverse partitions arranged at intervals in the length direction of the cylinder. According to the double-layer slant lathe body, the machine tool vibration can be effectively reduced, so that the machining precision of the machine tool is improved, the bending resistance and the torsion resistance are enhanced, and the service life of the machine tool is prolonged.

Description

technical field [0001] The invention belongs to the field of machine tools, and in particular relates to a double-layer inclined bed of a turning center and a manufacturing method thereof. Background technique [0002] High-speed cutting is an urgently needed equipment in the fields of automobiles, aerospace, and precision molds. The positioning accuracy does not exceed 3 μm under high-speed and fast-moving speeds, which places extremely high requirements on the rigidity of machine tools. As the supporting body of the turret and cutting force, the bed is the fundamental guarantee to achieve high precision and high dynamic performance, and is the key to determine the accuracy of the whole machine. At present, the internal ribs of the inclined bed of the machine tool in the domestic turning center all adopt well-tac-toe ribs. With the development of turning centers towards high cutting speed, high feed speed and high machining accuracy, the dynamic performance of the bed as a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q1/01B23P15/00
CPCB23P15/00B23Q1/015
Inventor 王立民袁旎呼如亮朱云云袁景辉王涛
Owner JIANGSU YUANLI AVIA PRECISION MACHINE TOOL
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