JP3924951B2 - Opposing 2-axis lathe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an opposed two-axis lathe, and more particularly to an improvement in the partition structure of the space between the spindles.
[0002]
[Prior art]
In the opposed two-axis lathe, a movable partition cover may be provided so that chips and the like do not interfere with lathe components and workpieces on both sides when a workpiece gripped by each spindle is processed. Conventionally, this movable partition cover is a sliding door that slides linearly backward to open the space between the main shafts.
[0003]
[Problems to be solved by the invention]
However, if the movable partition cover between the main shafts is slid rearward as described above, the movable partition cover protrudes rearward from the lathe bed during the backward movement, and the depth dimension required for installing the lathe becomes longer. In addition, it is preferable to use a cylinder device as the opening / closing drive means of the movable partition cover, but the cylinder device protrudes rearward and the depth dimension is further increased.
Opening the movable partition cover upward prevents the lathe from increasing in depth, but in automatic lathes, loaders are often installed in the upper space outside the machine. Opening the door will hinder the installation of loaders.
[0004]
The purpose of this invention, while the movable partition cover provided between the main shaft, the depth can be shortened, and to provide outside of opposing 2 axis lathe which does not require extra space in the upper, the knives stand maintenance However, it is to be able to easily perform without being obstructed by the movable partition cover.
Another object of the present invention is to make it possible to store the movable partition cover in a space-efficient manner in a lathe having a bottom cover that prevents chips and the like from dropping off.
[0005]
[Means for Solving the Problems]
The opposed two-axis lathe according to the present invention has two main spindles opposed to each other, and a movable partition cover that partitions the space between the spindles is divided into a partition position that partitions the space and a non-partition position that is not partitioned. A turning drive means is provided that is turnable around a substantially parallel turning center and that drives the movable partition cover to turn forward and backward.
According to this configuration, the movable partition cover is pivoted about the pivot center substantially parallel to the spindle axis and is opened and closed between the partition position and the non-partition position. The depth required for opening and closing the partition cover is small. Further, the turning drive means can be installed without projecting backward from the bed. For these reasons, the depth dimension required for installing the lathe can be shortened while providing the movable partition cover. Further, since the movable partition cover is pivoted to open and close, no space for retracting the movable partition cover is required above the lathe.
[0006]
In the present invention, a tool post arranged in parallel with each of the spindles is provided, and the movable partition cover is provided with an opening corresponding to the tool post in the non-partition position, and a partial cover for closing the opening is provided as the movable partition. The cover may be provided detachably.
In the case of this configuration, by removing the partial cover of the opening while the movable partition cover is opened to the non-partition position, the tool can be attached to and detached from the tool rest and other maintenance can be performed from the opening. In addition, since the movable partition cover is provided with a partial cover so that it can be attached and detached, unlike the case where the movable partition cover is made as small as necessary for maintenance of the tool post, for example, the tool post can be partitioned while securely partitioning the space between the opposing spindles. The movable partition cover can be kept out of the way during maintenance.
[0007]
Further, in the present invention, a lower part provided with a tool post aligned in parallel with each of the main spindles, provided with a bottom cover inclined below the space between the tool post, and having the movable partition cover as a substantially fan shape and near the center of the fan shape. The movable partition cover may be inserted into a slit provided in the bottom cover so as to freely enter and exit, and the swivel driving means may be a cylinder device disposed below the bottom cover.
In the case of this configuration, the bottom cover prevents the chips scattered during the processing and the chips attached to the tool of the tool post from dropping to the bottom of the machine. Since the movable partition cover enters and exits the bottom cover, the space under the bottom cover is effectively used as a storage space for the movable partition cover, and the movable partition cover can be stored efficiently in space. Further, since the turning drive means of the movable partition cover is a cylinder device, the turning drive means can be of a simple configuration, and since the turning drive means is located under the bottom cover, the turning drive is performed while using the cylinder device. The installation place of the means can be secured freely.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 2, this opposed biaxial lathe has a pair of opposed spindles 3 and 3 installed on a bed 1 via a spindle stock 2, and is arranged in parallel with each spindle 3 with a tool post. Some turrets 4 and 4 are installed. Each turret 4 is installed on the bed 1 via a turret carriage 5 so as to advance and retreat in the cutting direction with respect to the main shaft 3. Each turret 4 is installed on the turret carriage 5 so as to be able to advance and retreat in the axial direction, or the turret carriage 5 can be moved in the axial direction by configuring the turret carriage 5 in a plurality of stages. Of the left and right headstocks 2 and 2, either one (right side in the illustrated example) of the headstock 2 is installed on the bed 1 via a guide 23 so as to be able to advance and retract in the direction of the main axis. By this forward / backward drive, the workpiece W can be directly delivered between the spindles 3 and 3 and the workpiece W is fed relative to the turret 4 tool. Therefore, the turret 4 that has moved the headstock 2 is configured not to move in the direction of the main shaft. Further, the main spindle 3 of the movable spindle stock 2 is configured to be able to insert a long rod-shaped workpiece.
[0009]
In the entire lathe, the entire on-machine space on the bed 1 is covered with a machine body cover 6, and a pair of front doors 7 are opened by sliding to both sides on the front surface of the machine body cover 6, that is, the surface on the main shaft 3 side. Is provided. A space S1 between the pair of main shafts 3 and 3 in the machine body cover 6 is partitioned by a movable partition cover 8, and an upper portion of the space S2 between the opposed turrets 4 and 4 in the machine body is partitioned by a fixed cover 9. A bottom cover 10 is provided below the interturret space S2. The bottom cover 10 is installed on the bed 1 via a support member 18 (FIG. 1). Further, a chip receiver 11 is provided below the inter-spindle space S1.
[0010]
As shown in FIG. 1, the turret 4 is installed at a position higher than the main shaft 3, and the movement of the turret 4 in the cutting direction is an inclination direction. The bottom cover 10 is provided so as to be inclined so that the front side is lowered, and a slit 11 (FIG. 3) into which the movable partition cover 8 is freely inserted and removed is formed in the middle in the width direction. A sealing member 14 (FIG. 4) made of an elastic body such as rubber is attached to both sides along the slit 11, and the sealing member 14 is in close contact with both side surfaces of the movable partition cover 8.
[0011]
The movable partition cover 8 is formed in a substantially sector shape, and is supported on the mounting base 12 by a support shaft 13 so as to be pivotable about the pivot center P at the lower end of the sector shape. The turning center P is a horizontal axis parallel to the axial direction of the main shaft 2. The movable partition cover 8 has a small sector portion 8a in the vicinity of the sector center, and the main body portion of the movable partition cover 8 extends from the outer diameter side of the small sector portion 8a. A portion of the movable partition cover 8 on the front side of the small fan-shaped portion 8 a does not enter the slit 11 of the bottom cover 10 and is positioned above the bottom cover 10. The outer diameter edge of the movable partition cover 8 includes an arcuate front outer diameter edge 8b having a large diameter and an arcuate rear outer diameter edge 8c having a small diameter via a stepped portion 8d in the radial direction. It is the following shape. The rear outer diameter edge 8c and the stepped portion 8d are fitted to the double plate portion 9a of the fixed partition cover 9 so as to cover the opening edge in a state where the movable partition cover 8 is in a position for partitioning the inter-spindle space S1. waiting. The fixed partition cover 9 is formed by closing the arc-shaped notch provided in the fixed cover main body plate 9b from both sides with two plates to form a double plate portion 9a. In the double plate portion 9a, The front part of the movable partition cover 8 can be accommodated in a non-partition turning state toward the rear.
[0012]
The movable partition cover 8 is pivotally driven to a partition position and a non-partition position that partition the inter-spindle space S <b> 1 by driving of the swing driving means 16. The turning drive means 16 is disposed at the rear part below the bottom cover 10. The turning drive means 16 is composed of a cylinder device such as a hydraulic cylinder or a pneumatic cylinder, and is supported on the bed 1 via an installation table 17 so as to be swingable about a horizontal axis. The tip Q of the piston rod of the turning drive means 16 is rotatably connected to the radial edge at the rear of the fan-shaped movable partition cover 8.
[0013]
An opening 19 is formed in a notch shape at the front radial edge of the movable partition cover 8, and a partial cover 20 that closes the opening 19 is attached to the movable partition cover 8 so as to be freely attached and detached. The opening 19 is formed at a position corresponding to the turret 4 in a state where the movable partition cover 8 is in the rear non-partition position. Specifically, the opening 8 is provided so that the outer peripheral edge of the turret 4, for example, the vicinity of the outer peripheral edge facing the main shaft 3 of the turret 4 corresponds to the opening 8. The partial cover 20 is attached to the movable partition cover 8 by inserting the peripheral edge of the partial cover 20 into the insertion holding portions 21 provided on both sides along the edge of the opening 19, and screws, pins, and other appropriate stoppers ( (Not shown) is used to prevent it from coming off.
Further, in a state where the movable partition cover 8 is in the partition position, the front edge is sandwiched between the flange portions 7a of the abutting edges provided on the pair of front doors 7 of the body cover 6 (FIG. 2). The two flange portions 7a are open at the ends, and the movable partition cover 8 can be advanced from the non-partition position to the partition position with the front doors 7 closed, and can be interposed between the flange portions 7a.
[0014]
The operation of the movable partition cover 8 having the above configuration will be described. During the processing, as shown in FIGS. 1 and 5A, the movable partition cover 8 is set to a partition position where the space S1 between the main shafts 3 and 3 is closed.
When the long spindle-shaped workpiece W is cut off, the movable partition cover 8 is used when the spindle head 2 on one side is moved to grip the workpiece W between the spindles 3 and 3 on both sides. As shown in Fig. 2, the inter-spindle position S1 is a non-partitioning position. At this time, the outer diameter portion of the front portion of the movable partition cover 8 is accommodated in the double plate portion 9 a (FIG. 1) of the fixed partition cover 9. The opening / closing drive of the movable partition cover 8 is performed by expansion and contraction of the turning drive means 16 comprising a cylinder device.
[0015]
Since the movable partition cover 8 is pivoted in this way and moved to open and close between the partition position and the non-partition position, the depth dimension required to open and close the movable partition cover 8 is smaller than when the movable partition cover 8 is moved back and forth linearly. That's it. Further, the turning drive means 16 comprising a cylinder device can be arranged on the machine side, that is, without projecting greatly from the bed 1. For these reasons, the depth dimension of the machine can be shortened. In addition, since the movable partition cover 8 pivots around the pivot center P below the movable partition cover 8 and is opened and closed, no space for retracting the movable partition cover is required above the lathe.
The movable partition cover 8 is protruded from the slit 11 of the bottom cover 10, but since the sealing members 14 attached to both side edges of the slit 11 are in close contact with both side surfaces of the movable partition cover 8, the slit 11 covers the bottom cover 10. Chips do not enter the interior of Moreover, since the front part of the movable partition cover 8 is located above the bottom cover 10 and is fitted into the slit 11 by the small fan-shaped part 8a, the movable partition cover 8 is fitted into the slit 11 as it rotates. The insertion length does not fluctuate, and this also provides a reliable intrusion prevention effect such as chips from the slit 11.
[0016]
Moreover, since the opening 19 corresponding to the turret 4 is provided in the movable partition cover 8 in the non-partition position, the attachment and detachment of tools and other maintenance can be easily performed on the turret 4. Since the partial cover 20 is detachably attached to the opening 19, the space S1 can be reliably partitioned when the movable partition cover 8 partitions the inter-spindle space S1.
[0017]
【The invention's effect】
The opposed two-axis lathe according to the present invention is provided with a movable partition cover for partitioning a space between the main shafts at a partition position and a non-partition position for partitioning the space so as to be rotatable around a rotation center substantially parallel to the main shaft axis, Since the turning drive means for turning the movable partition cover forward and backward is provided, the depth dimension can be shortened while providing the movable partition cover between the main shafts, and an extra space is also required above the outside of the machine. The effect of not doing is obtained.
In addition, when the movable partition cover is provided with an opening corresponding to the tool post in the non-partition position, and a partial cover that closes this opening is provided detachably on the movable partition cover, the maintenance of the tool post is performed by the movable partition cover. It can be done easily without being blocked by the cover.
A tool cover arranged parallel to the main spindles, a bottom cover inclined downward in the space between the tool rests, a bottom cover that is substantially fan-shaped and having a lower portion near the center of the fan shape as a center of rotation, When the movable partition cover is inserted into a slit provided in the bottom cover so as to freely enter and exit, and the swivel driving means is a cylinder device disposed below the bottom cover, dropping of chips, etc. In the lathe having the bottom cover for preventing the movable partition cover, the movable partition cover can be stored in a space efficient manner.
[Brief description of the drawings]
FIG. 1 is a cutaway side view mainly showing a machine body cover of an opposed two-axis lathe according to an embodiment of the present invention.
FIG. 2 is a cutaway plan view of the lathe.
FIG. 3 is a partial perspective view of the bottom cover.
FIG. 4 is a cross-sectional view showing a fitting portion between the slit of the bottom cover and the movable partition cover.
FIG. 5 is an operation explanatory view of a movable partition cover.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Bed 2 ... Spindle head 3 ... Spindle 4 ... Turret (turret)
6 ... Airframe cover 7 ... Front door 8 ... Movable partition cover 9 ... Fixed partition cover 10 ... Bottom cover 11 ... Slit 16 ... Swivel drive means 19 ... Opening 20 ... Partial cover P ... Swivel center S1 ... Space between spindles

Claims (3)

A movable partition cover having two opposing main shafts and partitioning the space between the main shafts can be swung around a swivel center substantially parallel to the main shaft axis between a partition position for partitioning the space and a non-partition position for partitioning the space. Provided with a turning drive means for turning the movable partition cover in a forward and reverse direction, and provided with a tool post arranged in parallel with each of the main shafts, and the movable partition cover being attached to the tool post in the non-partition position. A facing two-axis lathe provided with a corresponding opening, and a partial cover for closing the opening is provided detachably on the movable partition cover . A tool cover arranged parallel to the main spindles, a bottom cover inclined downward in the space between the tool rests, a bottom cover that is substantially fan-shaped and having a lower portion near the center of the fan shape as a center of rotation, 2. The opposed twin-screw lathe according to claim 1 , wherein the movable partition cover is inserted into a slit provided in the bottom cover so as to freely enter and exit, and the turning drive means is a cylinder device disposed below the bottom cover. . A movable partition cover having two opposing main shafts and partitioning the space between the main shafts can be swung around a swivel center substantially parallel to the main shaft axis between a partition position for partitioning the space and a non-partition position for partitioning the space. Provided with a turning drive means for turning the movable partition cover in a forward and reverse direction, provided with a tool post aligned in parallel with each of the spindles, and provided with a bottom cover inclined downward in the space between the tool posts, The partition cover is substantially fan-shaped, and the lower part near the center of the fan-shaped center is the swivel center, the movable partition cover is inserted into a slit provided in the bottom cover, and the swivel driving means is connected to the bottom part. Opposing two-axis lathe as a cylinder device arranged below the cover.

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