JP4142899B2 - NC lathe chip accumulation prevention cover structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a slide cover structure that prevents chips from accumulating on a table of a machine tool.
[0002]
[Prior art]
A two-spindle-facing NC lathe with a slant-type structure in which the upper surface of the bed is tilted downward on the front side and the two main shafts facing each other on the same left and right axes rotates around the B axis at the upper rear of the main shaft. The one equipped with a controlled tool post is employed.
For NC lathes with a long stroke in the Z-axis direction (axial direction of the headstock) so that workpieces to be machined can be handled, the Z-axis of the tool post disposed at the upper rear part of the spindle The direction stroke is also longer.
In this case, for example, as shown in FIG. 5, the tool rest 102 that slides along the tool rest slide way 103 and the L-side headstock 101 </ b> L or the R-side headstock 101 </ b> R overlap in the Z-axis direction on the stroke. Therefore, space 105L, 105R for it is required behind the headstock.
Further, since the left side cover 104L and the right side cover 104R for preventing the scattering of chips exist, there is a problem that the chips accumulate in this space portion.
[0003]
Conventionally, in this type of Z-axis long stroke lathe, a fluid for forcing the chips to be ejected, for example, the right side cover itself has been abolished and chips can be discharged, etc. there were.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a cover structure capable of preventing chips from accumulating behind a Z-axis direction long-stroke NC lathe headstock in view of the technical problems of the above-described conventional technology.
[0005]
[Means for Solving the Problems]
The present invention relates to a slant type NC lathe in which two headstocks are arranged facing left and right, and a tool post is slidable in the Z-axis direction at the rear upper part thereof, and a multi-stage having a convex box shape behind the headstock By attaching the type slide cover, the space behind the headstock is eliminated, and the scattering of the chips is suppressed, and the accumulation of the chips on this portion is prevented.
[0006]
In addition, in order to move and drop the chips falling on the multistage slide cover onto the inclined table surface, wiper means are provided at each overlapping portion joint of the multistage cover.
[0007]
Furthermore, by providing a wiper means between the multi-stage slide cover and the headstock cover, scrapes of chips in the gap between the multistage slide cover and the headstock cover are prevented, and accumulation of chips on this portion is prevented. can do.
[0008]
In this way, a multistage slide cover is provided at the rear of the headstock, and the convex shape is obtained by extending and retracting the slide cover in accordance with the movement of the tool post disposed at the upper rear part of the headstock in the Z-axis direction. The box-shaped cover shape eliminates the recess behind the headstock, suppresses the scattering of chips, and wipes the chips that have fallen on this cover with a wiper provided at the joint of the overlapping parts of the multistage slide cover. It moves on the inclined table from the center by sequential feeding and discharges.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view of an NC lathe to which a chip accumulation preventing cover according to the present invention is applied.
The bed 3 has a slant structure that is inclined toward the front, front, and lower side.
The left spindle stock 1L and the right spindle stock 1R are disposed on the same left and right axis so as to face each other.
The headstocks L and R can be slid in either the Z-axis direction (left-right direction) or one another.
A tool post 2 is provided at the rear upper part of the headstock so that the position in the vertical Y-axis direction can be controlled and the turning control around the B-axis can be controlled. Although not shown, the Z-axis direction is provided along the slide way arranged on the bed. It is slidable in the left and right direction.
[0010]
Multistage slide covers (bellows covers) 4L and 4R are provided on the left and right sides of the tool rest 2 behind the headstock.
The structure of this multistage slide cover will be described below with a focus on the L side (4L), but the basic structure is the same on the R side (4R).
A front view of the left multi-stage slide cover 4L is shown in FIG. 2, and a longitudinal sectional view thereof is shown in FIG.
As shown in FIG. 2, in this example, six covers 41, 42, 43, 44, 45, and 46 are overlapped from the right side.
These covers are connected to each other by the pantograph 5, and the respective covers extend and contract.
These six covers have a convex box-shaped structure for the purpose of closing the space on the rear table of the headstock as shown in FIG. 3, and are slidably supported by the upper cover slide rail 6, The lower side is guided.
The right end cover is a shielding plate 41a that closes the space on the table.
[0011]
FIG. 4 shows an enlarged schematic view between the overlap joint of the cover and the headstock.
A wiper formed of a rubber material or the like is attached to each of the overlapping joints of the covers 41, 42,... And a wiper 8 is provided between the headstock fixing cover 1a and the cover.
[0012]
【The invention's effect】
In the present invention, it is possible to suppress the scattering of chips by using a convex box-shaped cover that is behind the headstock and closes the left and right spaces of the tool post at the upper rear of the headstock.
This cover has a multi-stage slide cover structure, so that it can be expanded and contracted in accordance with the mutual movement of the headstock and the tool rest, and the chips on the cover are wiped off by a wiper at the cover joint at the center inclined table. You can scrape it up.
Further, the wiper provided between the cover and the headstock cover can scrape off the chips that have entered the gap.
As described above, in the present invention, since the chips do not accumulate behind the headstock, the machine tool (lathe) can be designed more compactly.
[Brief description of the drawings]
FIG. 1 is an external view of an NC lathe to which a chip accumulation preventing cover structure according to the present invention is applied.
FIG. 2 is a front view of a multistage slide cover.
FIG. 3 is a longitudinal sectional view of a multistage slide cover.
FIG. 4 shows an enlarged view of the joint of the cover.
FIG. 5 is an external view of a conventional Z-axis direction long stroke lathe.
[Explanation of symbols]
1L, 1R Headstock 1a Headstock cover 2 Tool post 3 Bed 4L, 4R Multi-stage slide cover 41, 42, 43, 44, 45, 46 Cover 41a Shield plate 5 Pantograph 6 Cover slide rail 71, 72, 73, 74 Wiper 8 Wiper

Claims (3)

In a slant type NC lathe with two headstocks facing left and right, and a tool post slidable in the Z-axis direction at the upper rear, a convex box-shaped multistage slide cover is placed behind the headstock. NC lathe's chip accumulation prevention cover structure characterized by being installed. The NC lathe chip accumulation prevention cover structure according to claim 1, further comprising a wiper means at each overlapping portion joint of the multistage slide cover. 3. A chip accumulation preventing cover structure for an NC lathe according to claim 1, wherein wiper means are provided between the multistage slide cover and the headstock cover.

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