JPH0739043B2 - Material support - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a material support tool for supplying a long material to a working area every cycle from the rear of a spindle of a machine tool. The material support tool can prevent not only vibration of the material but also noise and material scratches by selecting an appropriate form of the support tool depending on the material diameter, shape, material, etc.
Various innovations have been made since ancient times. Due to the remarkable progress of machine tools in recent years, there has been a demand for a material support tool that is compatible with a new technology that accompanies an unmanned operation as well as an increase in the accuracy and speed of a spindle. Specifically, the use of a support made of a new material that can withstand higher spindle speeds, a support structure that suppresses vibration of the material, and a flexible design that pursues ease of setup according to the diameter and shape of the material. Support equipment and compatible components for common use. Conventionally, there are various types of support structures for material support tools, each of which has its own characteristics. Among them, there are a support tool formed of a synthetic resin of a general plastic substance and a support tool in which a fluid is enclosed or circulated in a support tube of a material, each of which has advantages and disadvantages. In the former case, as the spindle speed increases, proportionally to this, it is not easy to select and obtain a synthetic resin with excellent heat resistance and wear resistance that can withstand the high heat and wear caused by friction between the material and the support, and the elastic cushioning. Since the action is fixed, in the latter case, since a large amount of fluid is enclosed or constantly circulated in the pipe that is the feed guide orbit of the material, the material is piped in the feed orbit section of the material that communicates with the main shaft. If the seal is exposed to the outside of the body or if the seal is incomplete, the fluid adhering to the material drips onto the floor surface and pollutes the floor surface, or the floor surface becomes fluid and slips, causing unexpected injury. May be invited. In addition to such a deterioration of the working environment, it is necessary to pay attention to the clogging of the filter by regularly polluting the fluid by contaminating it with fine metal pieces attached to the material, dirt, microorganisms, etc. I won't. In addition to this fluid recovery work, a device with a large circulation function is installed, which leads to high cost.In addition, there is a large gap between the material diameter of the fluid filled in the tube and the tube inner diameter, causing the material to bend. In some cases, turbulent flow occurs, which causes noise due to vibration inside the pipe. In addition, when the clean work of the fluid is incomplete simultaneously with the above, cavitation may be caused on the side of the discharge pump to further promote noise. In the present invention, both functions are used in combination, but it is an object of the present invention to provide a novel material support tool from which these drawbacks have been eliminated.

Hereinafter, the present invention will be described with reference to the drawings.

Reference numeral 1 is a rear part of the main shaft of the machine tool, and serves as a guide for supporting and supplying the material, which is used in a device that supports the material and supplies the material to the processing area for each cycle from the rear part of the main spindle through the material feeding means. The material support takes the form of a double tube over the entire length corresponding to the length of the long material. An outer tube 3 which is a jacket tube having an inner diameter somewhat larger than the outer diameter of the inner tube 2 is provided outside the inner tube 2 which is a material feeding tube serving as a material feeding track.
The space 4 around the inner pipe 2 and the outer pipe 3 that encloses the material feed path is filled with a fluid that is sealed or circulates through the discharge pump in communication with the outside. Reference numeral 5 denotes a main body of a support tool which is arranged in the inner tube 2 at equal intervals with a spacer 6 interposed in the material feeding orbital direction, and communicates with a flow path 7 communicating from the outer circumference of the inner tube 2 to the inner circumference. A cylinder chamber 8 is formed inside the peripheral wall side of the support main body 5 that encloses the material feed path. Reference numeral 9 denotes a material support portion that is formed in the cylinder chamber 8 and is exposed to the outside from the inner peripheral side of the support body 5, and receives the fluid pressure filled in the cylinder chamber 8 to feed the material in the radial direction. The concentric position of the tube is held floating to support the material. Although various forms of the material support 1 are possible, the present invention shows two embodiments. In FIG. 1, a piston ring having a T-shaped material support portion 9 having a side wall of a radial cross section is loosely mounted in the cylinder chamber 8. When assembling the material support portion 9 to the support body 5,
A pair of bilaterally symmetric divided support body 5 sandwiches the cylinder spacer 8a and receives the pressure of the spacers 6 arranged on both sides to sandwich the material support portion 9. The material supporting portion 9 shown in FIG. 3 is divided into two parts from the radius and forms the same cross section as above. The material supporting portion 9 is formed in the cylinder wall 8 of the T-shaped groove formed on the peripheral wall side of the support body 5 as a peripheral wall. This is a structure in which a pair of material supporting portions 9 are fitted into the inner pipe 2 from the side direction and are fitted together. This structure can also be applied to the openable / closable material support shown in FIG. In this case, both ends of the cut side surface of the cylinder chamber 8 are hermetically sealed, and a shielding plate 10 is fixed to the outside on the outer tube 3 so that the material support portion 9 does not drop from the cylinder chamber 8. Although the fluid filled in the cylinder chamber 8 slightly flows out into the inner tube 2 from the cylinder chamber 8, a complete sealing mechanism is not applied, and a friction effect between the material supporting portion and the material is found to prevent wear.

As described above, according to the present invention, since the cushioning effect of the fluid is large and a large amount of the fluid is not filled in the pipe body, it is possible to provide the material support tool which is inexpensive in addition to the fluid exchange and recovery work.

[Brief description of drawings]

1 is a longitudinal sectional view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a longitudinal sectional view showing a second embodiment of the present invention. FIG. 4 is a sectional view taken along the line BB of FIG. 3, and FIG. 2 ... Inner tube, 3 ... Outer tube, 5 ... Support body 8 ... Cylinder chamber, 9 ... Material support

Claims (1)

[Claims] 1. An inner side of a peripheral wall of a support main body, which is arranged at equal intervals in the material feed trajectory direction so as to enclose a material feed trajectory communicating with a fluid flow path communicating from the outer circumference to the inner circumference of the material feed pipe body. A material support tool, wherein a fluid filled in a cylinder chamber formed in the above is held in a material support portion formed by being idled in the cylinder chamber and exposed to the outside from the inner peripheral side of the support tool body.