JPH0757441B2 - Mounting structure of guide tube in bar feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION -Industrial field- The present invention inserts a rod-shaped material into a hollow guide tube, rotatably supports it by a fluid cushion in the guide tube, and transfers it in the axial direction for machining. The present invention relates to a device for supplying a machine, and more particularly to a structure for mounting or positioning a guide tube on a support frame.

This kind of rod material feeding device feeds a rod-shaped material through a central hole provided in the main shaft of an automatic lathe, and successively processes the tip of the material,
It has been conventionally used when continuously manufacturing short cylindrical workpieces by cutting.

-Prior art-The guide tube for supporting the material is detachably mounted on the support frame because it needs to be replaced when the diameter of the supplied material changes, but the central axis of the guide tube So that they are accurately located on the spindle axis of the lathe, and that the through holes for fluid supply provided in the guide tube and the slits through which the arm of the material transfer device passes are always in the prescribed position. The tube must be accurately positioned and mounted on the support frame.

In the conventional device, the guide tube is composed of one long tube body, and a knock pin is used as a positioning means for the guide tube. That is, by positioning one end of the guide tube on the support frame with a knock pin, the through hole for fluid supply of the guide tube, the slit, and the like are positioned at predetermined positions.

-Problems to be Solved by the Invention- However, in the conventional device, since the guide tube is composed of a single long tube, a great deal of labor is required for replacing the guide tube, and a large number of guides with different diameters are required. There is a problem that a large space for storing the pipe is required. As one of means for solving this problem, it is conceivable that one guide tube is composed of a plurality of divided pipe bodies. In this case, it is necessary to provide a positioning means for each of the divided pipe bodies. Since there are many knock pins in the conventional means,
The support structure for the guide tube becomes complicated.

The present invention has been made for the purpose of solving the above problems and obtaining a more rational guide tube positioning means. It is not necessary to provide an independent positioning means, and a plurality of tube bodies are used. It is an object of the present invention to provide a rod material supply device having a structure capable of surely positioning each pipe body even when the guide pipe is constructed.

-Means for Solving the Problems-In the bar feeding device of the present invention, attention is paid to the fact that a large number of through holes for fluid supply are provided in the guide tube, and the through holes are used to position the guide tube. In the bar material supply device in which the guide tube 6 is detachably supported by the support frame 1, the support frame 1 has a predetermined shape. The pedestals 4 having a seating surface 29 are arranged and the guide tube 6 is provided with the seating surface 29.
28 is provided on the seating surface 29, and the fluid supply nozzle 30 is fitted to the support portion 28 of the guide tube 6 and is provided in the guide tube 6. Through hole 31 communicating
And the fluid supply nozzle 30 is communicated with the cushion fluid supply source 20 to the guide tube 6.

-Operation- The guide tube 6 includes a fluid supply nozzle 30 ... 30 and a through hole 31 of the guide tube.
The guide tube 6 can be mounted at an accurate position on the support frame 1 without providing any special positioning means. Further, as shown in the illustrated embodiment, even when a plurality of independent tube bodies 12 ... 12 are arranged in the axial direction to form one guide tube 6, each tube body 12
Since the through hole 31 for supplying the cushion fluid is provided in each of the tube bodies 12, 12 can be positioned at this through hole 31, and the guide tube 6 can be mounted by dividing the guide tube 6. No hindrance will occur.

-Embodiment- FIG. 3 shows an embodiment of the present invention. FIG. 3 is a side view showing the internal structure of the entire apparatus, FIG. 4 is the same plan view, and FIG. It is a figure.

In FIGS. 3 to 5, 1 is a support frame horizontally supported by support legs 2 and 3, 4 ... 4 is a base fixed on the support frame 1, and 5 is a guide tube 6 on the base 4. Is a fixed clamp, 7, 8 are pulleys mounted on the front and rear ends of the frame 1, 9 is a chain wound between the pulleys 7 and 8, and 10 is a chain driving motor.

The frame 1 is mounted on a support leg 2 at the rear end so as to be rotatable about a vertical axis and slidable on the upper surface of the leg 3 at the front. The material is inserted into the guide tube 6 by shaking the guide tube 6 and inserting it from the machine tool side (right side in FIGS. 3 and 4).

The guide pipe 6 is arranged on the rotation axis of the rotating workpiece gripping device of the machine tool, and is provided with four pipe bodies 12 ... 12 and one pipe body 13.
It is configured by connecting and. The length of the material is equivalent to four tubes 12, and the tube 13 is a portion in which a push rod of a transfer device described later is installed. The plurality of pipes 12 are supported in a straight line by the pedestal 4 on the support frame, and the ends 12a and 12b of the adjacent pipes are connected to each other with a gap 14 therebetween. A cylindrical flange 15 having a large diameter is provided on one side 12a of the portion so as to surround the outer periphery of the other end 12b with a gap 14 (see FIG. 5).

A through hole 31 communicating with the fluid supply pump 20 is opened in each tube body 12, and the rod-shaped material 33 inserted into the guide tube 6 through the cushion of the liquid supplied from the through hole 31 rotates and rotates. It is supported so as to be movable in the axial direction. The cushion fluid supplied to the pipes 12 ... 12 flows out from the gap 14 between the ends 12a and 12b of the pipes. The cylindrical brim 15 provided at the end 12a of the tubular body has a gap 1
It serves to prevent the fluid flowing out of 4 from being scattered by the centrifugal force acting by the rotation of the material 33.

The frame 1 is provided with a receiving tray 17 for the fluid flowing out from the gap 14 of the pipe body 12, and the fluid in the receiving tray 17 returns to the fluid tank 19 arranged in the lower portion of the frame 1 via the discharge pipe 18.

An arm 26 shown in FIGS. 1 and 4 is attached to the chain 9 stretched along the guide tube 6, and the arm 26 is connected to a push rod (not shown) inserted in the guide tube 6. ing. When the chain 9 is driven by the electric motor 10, the push rod connected thereto moves in the pipe, and the material 33 is pushed by the push rod and is fed to the machine tool side (right side in FIGS. 3 and 4). To be done. Tubes 12 ... 12 and 13 have a first,
An axial slit 27 shown in Fig. 2 is provided, and the arm 26 connecting the push rod and the chain 9 has this slit.
Pass 27. In addition, 23 and 24 in FIG. 1 are chains 9.
It is a bracket connected to.

As shown in FIG. 5, the tube body 12 is provided with three support portions 28, and the support portions 28 are fixedly mounted on the pedestal 4. The pedestal 4 has a seating surface 29 (FIG. 1) that conforms to the outer peripheral shape of the support portion 28 (cylindrical in the illustrated embodiment), and the outer periphery of the support portion 28 and the seating surface 29 are in surface contact with each other. The tube body 12 is supported by.

As shown in FIGS. 1 and 2, a pin-shaped fluid supply nozzle 30 is projectingly provided on the seating surface 29 of the pedestal 4, and the fluid supply nozzle 30 supplies fluid through a branch pipe 34 and a distribution pipe 35. The pipe 16 communicates with the fluid supply pump 20. The fluid from the fluid supply pipe 16 is split into two distribution pipes 35, 35 at the fluid inlet port 36 to the distribution pipe 35, and every other two pipes alternate.
It is supplied to the fluid supply nozzle 30 through a branch pipe 34 branched from the distribution pipe of the book.

A through hole 31 having a diameter just fitted to the tip of the fluid supply nozzle 30 is bored in the supporting portion 28 of the pipe body 12.
By fitting and fixing the fluid supply nozzle 30 to
A fluid supply path to the guide pipe 6 is formed, and each pipe body 12
..The position of 12 in the axial and circumferential directions is accurately regulated. That is, if the through hole 31 is fitted and set in the fluid supply nozzle 30, the dimension of the gap 14 between the pipes 12 ... 12 is accurately regulated and the slit 27 of the pipes 12 ... 12 is accurately adjusted. Are arranged on a straight line. Therefore, the guide tube 6 can be mounted at the correct position on the support frame 1 without providing any special positioning means.

-Effect-Since the guide tube is positioned by fitting the fluid supply nozzle and the through hole of the guide tube, it is not necessary to provide an independent positioning means, and a simple support structure can be obtained. Also,
Even when a single guide tube is formed by a plurality of tube bodies, each tube body can be reliably positioned, and therefore there is no problem in mounting the guide tube due to the division of the guide tube. Therefore, it is possible to realize a bar material supply device that employs a split type guide tube in which the guide tube can be easily replaced and the space for storing the guide tube can be reduced.

[Brief description of drawings]

FIG. 3 shows an embodiment of the present invention. FIG. 3 is a side view of the entire apparatus, FIG. 4 is a plan view of the same, FIG. 5 is an enlarged view of a guide tube, and FIG. FIG. 2 is a sectional view taken along line BB in FIG. 1 and is an enlarged sectional view taken along line AA. In the figure, 1: support frame, 4: pedestal 6: guide tube, 12: tubular body 14: gap, 15: cylindrical collar 16: fluid supply pipe, 20: fluid supply pump 28: support part, 29: seating surface 30: Fluid supply nozzle, 31: Through hole 34: Branch pipe, 35: Distribution pipe

Claims (2)

[Claims] 1. A guide tube disposed on a rotation axis of a rotating workpiece gripping device of a machine tool, wherein a rod-shaped material inserted into the guide tube is rotatably supported by a fluid cushion in the guide tube. Further, in a rod-shaped material of a machine tool having a transfer device for feeding the rod-shaped material toward the workpiece gripping device, a tube body forming a guide tube is detachably attached to its support frame, and the support frame has a predetermined size. A pedestal having a seating surface having a shape is disposed, a support portion that is in surface contact with the seating surface is formed on the tube body, and a fluid supply nozzle is projectingly provided on the seating surface, and the support portion of the tube body is provided. A machine tool characterized in that a through hole that fits into the fluid supply nozzle and communicates with the inside of the pipe is bored, and the fluid supply nozzle is communicated with a supply source of cushion fluid to the guide pipe. Bar material supply device. 2. A plurality of independent pipes are arranged in a line in the longitudinal direction to form a substantially single guide pipe, and a cushion is provided between the ends of the pipes adjacent to each other. Claim 1 wherein the narrow gap through which the fluid flows is formed.
The bar material feeder described in the item.