Bar material supporting device for automatic lathe

Abstract

A bar material supporting device for automatic lathe. The bar material supporting device comprise a cylindrical body (11), fixed members (15) fixed to the outer surface of the cylindrical body (11), and supporting devices (13) which are fixed to the fixed members (15) and support the bar material (17) inside the cylindrical body (11), wherein a through hole (12) into which the supporting devices (13) are inserted is formed in the side surface of the cylindrical body (11), and the fixed members (15) fixing the supporting devices (13) are fixed to the outer surface of the cylindrical body (11) in the state that the supporting devices (13) are inserted from the through hole (12) to the cylindrical body (11). so a bar material (17) which is installed backward continuously on a spindle (50) of an automatic lathe and supported so that the bar (17) can be rotated smoothly by suppressing the bar held rotatably by a chuck (51) of the spindle (50) of the automatic lathe from being swung.

Description

technical field [0001] The present invention relates to a bar support for an automatic lathe that supports a long circular workpiece (collectively referred to as a "bar" in this specification) such as a bar and pipe processed by the lathe on the extension line of the main shaft of the automatic lathe device (hereinafter referred to as "bar supporting device"). Background technique [0002] This bar support device is installed near the automatic lathe, and rotatably supports the part of the long bar protruding from the headstock, so that the bar does not generate rotational vibration. As a conventional rod supporting device 100, such as Figure 28 As shown, there is a cylinder 111 with a predetermined length, a conduit 113 with a diameter slightly larger than the outer diameter of the rod 117 supported in the cylinder 111, and an oil pressure supply for supplying a large amount of oil for supporting the rod 117 into the conduit 113. Component 114. Along with the rotation of...

AI Technical Summary

Problems solved by technology

[0007] However, due to the adoption of the structure in which the bearings are split and supported by the upper and lower support members 119A, 119B, etc., the shape of the components will be complicated, and it will be difficult to process. It is extremely difficult to center the bearings on 119A and 119B with high precision

[0008] Also, if the distance between the bar 117 and the split bearings 123 is reduced to about 1mm or less, although the bar 117 can be rotated more noiselessly, since the upper and lower support members 119A, 119B are installed separately, therefore, In any case, it is impossible to install the same axis with high precision and straightness, resulting in a slight deviation of each axis after installation

For this reason, it is extremely difficult to further reduce the distance between the bar 117 and each of the upper and lower support members 119A, 119B in consideration of the axial center deviation of each of the upper and lower support members 119A, 119B.

Also, sometimes it is not possible to achieve noise-free

[0009] In addition, in the rod support device that supplies a large amount of oil and floats the rod by the supplied oil, even if the rotating rod vibrates, it can rotate in a noiseless state due to a large amount of oil, but the When a large amount of oil is supplied to each support member from an oil supply device installed on a large hydraulic unit, the problem of oil scattering may occur

Therefore, it is necessary to create a device that covers the whole body with a cover, collects the scattered oil, and returns it to the hydraulic unit for circulation, which increases the cost of the bar support device.

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