JPH03270808A - Material supply method and its device for lathe - Google Patents

Abstract

PURPOSE:To arrange so that a material may be able to be supplied in continuation without being controlled by the inside diameter size of the main shaft of a lathe when the material which becomes a working object is supplied to a lathe, by supplying the material by means of a material supply device from a lathe bed side. CONSTITUTION:The front end of the slide holder 10 of a material supply device 6 is made to front on the front of a chuck 4 from the bed 5 side of a lathe S, and the center of the slide holder 10 is made to agree with the rotation center of a main shaft, and a connecting bed 24 is connected to the lathe S. A material 1 is delivered out to a length that is enough to cover necessity by means of a material delivery means 7. Next, the material delivery means 7 with the material 1 left held and a holding mechanism 8 are moved to the front by means of a holding mechanism moving means 9, and part of the material 1 is held by means of a chuck 4. And then the lathe is started to be operated, and the material 1 is cut off at a predetermined place. Afterwards, the material delivery means 7 and the holding mechanism 8 are moved back to the rear part once by means of the holding mechanism moving means 9, and mode to stand by. A preceding material portion which is held by means of the chuck 4, is worked on at a high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a material supply method for a lathe and its apparatus for supplying a material to be processed to a lathe.

<Conventional technology> In order to feed a material to be processed into a lathe, conventionally, the material is cut to a predetermined length and held in the chuck of the lathe, and then the main shaft of the lathe is rotated. Then, they were processed using the necessary tools. In addition, as shown in Figure 7, when processing is performed continuously from a long material ■,
A material l supplied by passing through the main shaft 3 of the lathe 2 is passed through a chuck 4 attached to the main shaft 3 and exposed to a bed 5 side for a predetermined length, and is gripped by the chuck 4 and processed. A commonly used method was to separate the processed product at the end.

<Problems to be Solved by the Invention> However, in the conventional technique of supplying the material 1 by passing it through the inside of the main shaft 3 of the lathe 2, the inner diameter of the main shaft 3 prevents the material 1 from passing through. The size range is limited. Further, during processing, the entire material 1 including the subsequent parts rotates, making it impossible to increase the rotational speed required for processing and thus making it impossible to increase efficiency. Furthermore, for a lathe, which is a turning machine, the range of rotational speed suitable for the processing is usually specified depending on the material and diameter of the material to be processed, the processing content, the tools used, etc. If there are restrictions, the processing content itself may be restricted. Furthermore, if the inner diameter of the main spindle of the lathe is increased so as to be able to process large-sized materials, the lathe itself also becomes larger and costs increase. The present invention has been made by focusing on such conventional technology,
It is an object of the present invention to provide a material supply method for a lathe and an apparatus therefor, which can continuously supply a material regardless of the inner diameter of the main shaft of the lathe and can perform processing efficiently.

<Means for Solving the Problems> In order to solve the above-mentioned problems, the material supply method for a lathe according to the present invention replaces the material that was conventionally supplied by passing through the inside of the main shaft of the lathe. The material to be processed is supplied to the chuck from the bed side, a part of this material is gripped by the chuck, the material is cut leaving the length necessary for one product processing, and then the subsequent cut material is The material part is once retracted, the necessary machining space is secured for the preceding material part held by the chuck, and the preceding material part is rotated and processed without being constrained by the succeeding material part. This is what I did.

The material feeding device for a lathe according to the present invention includes a material feeding means that guides the material to be processed from the bed side to the chuck of the lathe and feeds out the material by the length necessary for one product processing, and a material feeding device. The holding mechanism is equipped with a holding mechanism that holds the holding mechanism, and a holding mechanism moving means that moves the holding mechanism in the forward and reverse directions of material feeding while the holding mechanism is placed thereon.

The material feeding means includes a slide holder in which an inner cylinder for inserting and guiding the material is rotatably built into the outer cylinder via a bearing, and a clamp provided integrally with the slide holder for gripping and feeding the material. The holding mechanism has a holder housing with a holder clamp that grips the outer cylinder of the slide holder and holds the entire material feeding means in a replaceable manner, and the holding mechanism moving means includes: The present invention includes a slide base for mounting the holding mechanism, which is slidably placed on a connecting bed connected to a lathe, and a base drive device that moves the slide base in the forward and reverse directions of material feeding.

In addition, the holder housing of the holding mechanism placed on the slide base of the holding mechanism moving means is rotatable with respect to the slide base, and the holder housing of the holding mechanism is provided with a rotation drive device for rotating the material. . Furthermore, a tailstock device is integrally attached to the slide holder of the material feeding means, so that when the holder housing of the holding mechanism is rotated to a predetermined angle and the slide holder changes position, the tailstock device is attached to the slide holder of the material feeding means. The device is positioned at the center of rotation of the main shaft of the lathe.

In the above and below descriptions, "forward direction" means the direction in which the material is sent out, that is, the direction from the bed of the lathe to the chuck, and "reverse direction" means the opposite direction. This term is used to refer to Furthermore, in the following description, "front" means "forward direction" and "rear" is used as a term meaning "reverse direction".

By the method described above, it is possible to feed the material to the lathe without being limited by the inner diameter of its main spindle, and during machining, it is possible to apply rotation to the material that is not restricted to the subsequent material part, and, Space for processing can be secured.

Place the front end of the slide holder of the material supply device configured as above in front of the chuck from the bed side of the lathe, align the center of the slide holder with the rotation center of the chuck, that is, the rotation center of the main shaft, and place the connected bed on the lathe. Link.

The material inserted into the inner cylinder of the slide holder is sent forward by the material feeding means by a length necessary for one processing. Next, the material feeding means and the holding mechanism, which are still gripping the material, are moved in the forward direction by the holding mechanism moving means, so that a part of the material exposed from the front end of the slide holder is gripped by the chuck of the lathe. Turning then begins and the material is first cut at a predetermined location. The composite material feeding means and the holding mechanism are once retracted in the opposite direction, that is, backward, by the holding mechanism moving means, and the slide holder and the subsequent cut material part are retracted to a position where they will not interfere with the next turning process. Have it on standby in preparation for the process. The preceding material gripped by the chuck has the length necessary for one processing, that is, the length necessary for processing one product.
Suitable for various types of machining, or high-speed rotation is applied to subsequent material parts without restriction. In the material feeding means during standby, the extrusion drive mechanism is retracted to a predetermined position at the rear in an open state in which it does not grip the material.

Further, various material feeding means are replaced as appropriate depending on the dimensions of the material to be processed, and the material is held and used by the holding mechanism.

In other inventions, the holder housing is rotated after the material is cut, and the position is changed to a position where the slide holder and the subsequent cut material do not interfere with the next turning process, in preparation for the next process. Make it standby.

In addition, the rotation drive device installed in the holder housing applies rotation to the material in synchronization with the rotation of the lathe when cutting the material, and the rotation of the entire material including the subsequent parts is stable, uniform rotation, or high-speed rotation. Let it be.

Further, when the holder housing rotates to a predetermined angle and the slide holder changes its position, the tailstock attached to the slide holder is positioned at the center of rotation of the main shaft of the lathe as the position changes. Then, by moving the holding mechanism forward by the holding mechanism moving means, the tailstock device is brought into contact with the rotation center of the preceding material portion held by the chuck, thereby supporting the rotation of the preceding material portion.

<Embodiment> Hereinafter, a preferred embodiment of the material supply device for a lathe according to the present invention will be explained based on FIGS. 1 to 6, and the method will be explained each time as necessary.

FIG. 1 is a diagram showing a state in which a material supply device 6 is connected to a lathe S. The material supply device 6 includes a material feeding means 7, a holding mechanism 8, and a holding mechanism moving means 9, each of which will be explained below.

The material feeding means 7, as shown in FIGS. 2 and 3, has an extrusion drive mechanism 11 integrally provided with a slide holder IO. The slide holder 10 has an inner cylinder 12 for inserting and guiding the material 1 therein, and is rotatably housed inside an outer cylinder 13 via a bearing 14. The extrusion drive mechanism 11 includes a guide ring 16 equipped with a hydraulic clamp 15, which is a clamp for gripping the material 1, slidably attached to the outer circumference of the outer cylinder 13, and a hydraulic cylinder 17.
is attached between the guide ring 16 and the outer cylinder 13. As shown in FIG. 3, three hydraulic clamps 15 are provided on the guide ring 16, and are arranged at equal radial angles perpendicular to the central axis of the guide ring 16. Each part of the inner cylinder 12 and outer cylinder 13 corresponding to each hydraulic clamp 15 has a guide elongated hole 1 through which the hydraulic clamp 15 is inserted and which allows the hydraulic clamp 15 to be moved back and forth.
8.19 is provided. The respective hydraulic clamps 15 simultaneously expand and contract to grip and release the material, and the hydraulic cylinders 17 also hold the guide ring 1.
6 and hydraulic clamp 15 back and forth. That is, directly, the hydraulic clamp 15 grips the material 1 and moves forward, then releases the material 1 and moves backward, thereby repeatedly processing the material 1 for the length necessary for one processing. It is sent forward continuously.

The holding mechanism 8 includes a holder housing 22 provided with a through hole 21 through which the material feeding means 7 is inserted, as shown in FIG.
It is equipped with a hydraulic holder clamp 23 that grips the outer cylinder 13 of the slide holder IO and holds the entire material feeding means 7. Three holder clamps 23 are provided on the inner surface of the through hole 21 of the holder housing 22, and are arranged at equal radial angles perpendicular to the central axis of the through hole 21. This holding mechanism 8 can hold various material feeding means corresponding to the dimensions of various materials, and can appropriately select and replace the material feeding means 7 according to the dimensions of the material. .

The holding mechanism moving means 9 is a connecting bed 2 connected to a lathe S.
4, a slide base 25 on which a holding mechanism 8 is mounted is slidably mounted, and a hydraulic cylinder 2 serving as a base driving device
6 to move it back and forth. The slide base 25 is a plate having a substantially U-shaped planar shape, and a slide groove 28 corresponding to the guide protrusion 27 provided on the upper surface of the connecting bed 24 is provided on the lower surface of the slide base 25 . A hydraulic cylinder 26 is provided between the slide base 25 and the connecting bed 24, and the slide base 25, on which the holder housing 22 is placed, can be moved back and forth on the upper surface of the connecting bed 24. It is meant to be moved. In this way, the material 1 fed by the material feeding means 7 to a length necessary for one product processing is further advanced and gripped by the chuck 4 of the lathe S. After cutting the material to the length required for one product processing, that is, leaving the preceding material part, the following material part and the material feeding means are temporarily retracted to secure a machining space and not be restricted by the following material part. The process is performed by applying rotation to the preceding material in this state. Connecting bed 24
is equipped with legs 29 whose height can be adjusted,
In addition, the above-mentioned hydraulic clamp 15 and hydraulic cylinder 17.2
6 and the like.

FIG. 5 shows a slide base 25 in which the holder housing 22 placed on the slide base 25 is rotatable with respect to the slide base 25. The slide base 25 is provided with a rotation shaft 33 and a pair of guide pawls 34 that respectively correspond to a shaft hole 31 provided on the bottom surface of the holder housing 22 and a pair of arcuate guide holes 32 centered on the shaft hole 31. There is. The holder housing 2 is then rotated by a rotational drive device such as a hydraulic cylinder (not shown).
2 is rotatable with respect to the slide base 25. In this way, instead of securing the machining space by retracting as described above, the machining space is secured by rotation. In addition, 20 shown in FIG. 1 is the slide holder 10.
It is a rest that supports the slide holder IO, and its upper surface is provided with a sliding surface that supports not only the back and forth movement of the slide holder IO but also the position change during rotation.

Furthermore, in the embodiment shown in FIG.
, which gives the material 1 inserted therein rotation synchronized with the rotation of the main shaft of the lathe S, and is attached to the rear of the holder housing 22 with its center of rotation being the same as the main shaft of the lathe S. There is.

In the embodiment shown in FIG. 6, the outer cylinder 13 of the slide holder lO
A tailstock device 36 is attached to the top. When the holder housing 22 is rotated to a predetermined angle by the aforementioned rotary drive device and the slide holder 10 is in a state where the position has changed, the tailstock device 36 is moved to the center of rotation of the main shaft of the lathe S due to the position change. It is arranged in advance so as to be positioned. This tailstock device 36 corresponds to a "tailstock" used in a normal lathe, and a center 38 is attached to the front end of a main body 37 fixed to the outer cylinder 13 of the slide holder 10.

Note that this material supply device 6 can be used in combination with not only the lathe S but also various machine tools such as various press machines, welding machines, and assembly machines, and can be widely applied. Moreover, it can be used more widely by combining it with automatic machines such as numerically controlled lathes and performing synchronized operation.

<Effects of the Invention> The method and device for supplying material for a lathe according to the present invention have the content as described above, and by supplying the material from the bed side of the lathe, the inner diameter dimension of the main shaft of the lathe can be adjusted. Materials can be supplied continuously without being affected by Further, by making it possible to replace various material feeding means corresponding to materials of various sizes as appropriate, the dimensions of materials to be processed can be within a wider range.

After supplying the material, by cutting off only the required length, the preceding material held in the chuck of the lathe can be rotated at a speed suitable for machining or at high speed, increasing the efficiency of machining. be able to. In addition, when cutting only the required length, the rotary drive device applies rotation to the entire material, including the following parts, in synchronization with the rotation of the lathe, resulting in stable, uniform rotation or high-speed rotation. be able to. By retracting or rotating the slide holder and holding mechanism so as not to interfere with machining after the material is separated, machining space can be secured and machining freedom can be increased, further improving the efficiency of turning machining. It is something that makes you

Furthermore, a tailstock device provided on the slide holder supports the center of rotation of the preceding material portion gripped by the chuck, thereby enabling precise turning processing.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a state in which a material supply device for a lathe according to the present invention is connected to a lathe, Fig. 2 is a cross-sectional view of the material feeding means shown in Fig. 1, and Fig. 3 is a direction indicated by the arrow in Fig. 2. 4 is a side view of the holding mechanism seen from the direction indicated by the arrow ■ in FIG. 1. FIG. 5 is a sectional view taken along the line V--■ in FIG. 7 is an external view showing a state in which a tailstock device is attached to the material feeding means, and FIG. 7 is a side view showing a conventional method of feeding material by passing it through the inside of the main shaft of a lathe and its state. ■ -・-・-Material 2, S-・・・・Lathe bed material supply device Material feeding means Holding mechanism Holding mechanism Moving means Slide holder Extrusion drive mechanism Inner cylinder Outer cylinder bearing Hydraulic clamp (clamp) Guide ring Hydraulic cylinder penetration Hole holder housing holder clamp connection bed slide base hydraulic cylinder (base drive device) rotation drive device 6 tailstock device Fig. 4 Fig. 5

Claims (6)

[Claims] (1) The material to be processed is supplied from the bed side to the chuck of the lathe, a part of the material is gripped by the chuck, the material is cut leaving the length necessary for one product processing, and then , the cut subsequent material part is once retracted, the necessary machining space is secured for the preceding material part gripped by the chuck, and rotation is given to the preceding material part in a state where it is not constrained by the succeeding material part. A method for supplying material for a lathe, characterized in that the material is processed. (2) A material feeding means that guides the material to be processed from the bed side to the chuck of the lathe and feeds out the material by the length necessary for one product processing, a holding mechanism that holds the material feeding means, and a holding mechanism. A material supply device for a lathe, which is equipped with a holding mechanism moving means for moving the material in the forward and reverse directions while it is placed thereon. (3) The material feeding means includes a slide holder in which an inner cylinder through which the material is inserted and guided is rotatably built into the outer cylinder via a bearing, and a slide holder that is integrally provided with the slide holder and grips the material. the holding mechanism has a holder housing with a holder clamp that grips the outer cylinder of the slide holder and holds the entire material feeding means in a replaceable manner; The means of transportation are
Claim comprising: a slide base for mounting the holding mechanism that is slidably placed on a connecting bed connected to a lathe; and a base drive device that moves the slide base in the forward and reverse directions of material feeding. 2. The material supply device for a lathe according to 2. (4) The material supply device for a lathe according to claim 2 or 3, wherein the holder housing of the holding mechanism placed on the slide base of the holding mechanism moving means is rotatable with respect to the slide base. . (5) The material supply device for a lathe according to any one of claims 2 to 4, wherein the holder housing of the holding mechanism is provided with a rotation drive device for rotating the material. (6) A tailstock device is attached to the slide holder of the material feeding means, and when the holder housing of the holding mechanism rotates at a predetermined angle and the slide holder changes position, the tailstock device The material supply device for a lathe according to claim 4 or 5, wherein the material feeding device is positioned at the center of rotation of the main shaft of the lathe.