JP2782323B2 - Lathe Z-axis sliding surface cover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saddle of a four-axis control lathe having two sets of upper and lower Z-axis sliding surfaces and a protective cover for the lower Z-axis sliding surface shared by a tailstock.

[0002]

2. Description of the Related Art Conventionally, it is difficult to attach a protective cover between a saddle and a tailstock on a lower Z-axis sliding surface shared by a saddle and a tailstock of a four-axis control NC lathe. For example, if a telescopic cover is attached to this part, a large space is required between the tailstock and the saddle, the quill of the tailstock will protrude longer to reach the cutting edge to the work end face, and sufficient cutting performance will be obtained. Can not do. In the case of a lathe having a long center distance, the number of telescopic covers increases, which is not practical. For this reason, there is no protective cover between the saddle and tailstock,
In many cases, the sliding surface is left unexposed, and there is a problem that scratches due to cutting chips, corrosion due to cutting fluid, and the like are likely to occur.

A known technique developed to solve this problem is disclosed in Japanese Patent Application Laid-Open No. Sho 62-255043. The tailstock 102 is movable along a groove 101a of the guide table 101 as shown in FIG.
A support 103 extending along the groove is fixed to the support, and a bendable plate 104 covering the groove is attached between the support 103 and the front end 103a of the support in the extending direction, and the space between the headstock 105 and the tailstock 102 extends along the groove. The movable saddle 106 is provided with a hole 106a through which the plate 104 penetrates so that the saddle can move relative to the plate.

[0004]

The prior art of Japanese Patent Application Laid-Open No. 62-255043 described in the prior art uses a bendable plate as a cover, so that the plate thickness cannot be increased. There is a problem that when a relatively heavy object such as a workpiece is dropped, it is easily deformed or broken, and when used for a tool post saddle that frequently moves in the Z-axis during machining, it is deformed due to fatigue caused by constant bending. Also, there is a problem that the cover is not easily provided with a satisfactory service life and maintenance cost is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the prior art, and has as its object to provide a four-axis control NC lathe which is inexpensive and does not require maintenance cost without limiting other functions. An object of the present invention is to provide a protective cover that covers a lower Z-axis sliding surface shared by a saddle and a tailstock.

[0006]

In order to achieve the above object, the Z-axis sliding surface cover of the lathe according to the first aspect of the present invention has two pairs of upper and lower pairs in a slant bed of a four-axis control lathe .
A rear guide surface and a front guide surface which are shared by the saddle and the tailstock among the Z-axis sliding surfaces, and are a pair of lower Z-axis sliding surface protective covers; A first fixed cover is provided between the moving surface and the upper Z-axis sliding surface, a second fixed cover is provided between the rear guide surface and the front guide surface, and the first fixed cover penetrates a first hole below the headstock. (2) a first moving cover for the rear guide surface, which partially overlaps the fixed cover, and a front guide surface, which partially passes under the second fixed cover through a second hole below the headstock. A third moving cover for a rear guide surface, which is provided at the left end of the saddle, passes through a third hole of the tailstock, and partially overlaps with a distance on the second fixed cover; A fourth moving cover for a front guide surface, which penetrates below the tailstock and partially overlaps under the second fixed cover, is provided at the right end of the saddle; Those formed by providing a fifth moving cover partially overlapping the first part underneath the fixed cover overlaps said first moving cover and the third onto a moving cover to the left end of the tailstock.

The Z-axis sliding surface of the lathe according to claim 2
The cover penetrates through the fourth hole of the saddle and the second hole below the headstock and partially overlaps below the fourth moving cover and has a tip portion overlapping below the second moving cover. It is provided at the left end.

[0008]

According to the first aspect of the present invention, when the saddle moves in the Z-axis, the first and second movable covers fixed to the left end of the saddle overlap with the second fixed cover and the fifth movable cover.
The tip moves through the hole below the headstock, and the third and fourth moving covers fixed to the right end of the saddle overlap the second fixed cover and the fifth moving cover, and the tip moves below the tailstock. Move through the side. In claim 2, the fifth moving cover of fixing the tailstock to headstock left end as you move Z-axis, the first
With the fixed cover and the first and third movable covers overlapping each other, the distal end moves through the hole below the headstock, and the tailstock is moved.
Sixth moving cover secured to the left end moves in a state where the top portion passing through the hole of the saddle overlaps the fourth moving cover is overlapped below the second cover.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In a 4-axis NC lathe, two pairs of upper and lower Z-axis sliding surfaces are provided in parallel on a slant type bed 1 installed on the floor, and the upper Z-axis sliding surface is a pair of front and rear rear guide surfaces 1a.
And a front guide surface 1b, and a lower Z-axis sliding surface is constituted by a pair of front and rear guide surfaces 1c and 1d.

An upper saddle 2 having a guide in the X-axis direction is mounted on the upper Z-axis sliding surface (1a, 1b) so as to be movable and positionable, and is mounted on the lower Z-axis sliding surface (1c, 1d). A lower saddle 3 having a guide in the X-axis direction is mounted so as to be movable and positionable. An upper tool rest (not shown) is mounted on the X-axis guide of the upper saddle 2 and a lower tool rest (not shown) is mounted on the X-axis guide of the lower saddle 3 so as to be movable and positionable. On the surfaces (1c, 1d), a tailstock 4 is fixed to the right side of the saddle 3 so that the mounting position can be moved.
A headstock 5 is attached to the left end of the bed 1.

The bed 1 has an upper Z-axis sliding surface (1a, 1
b) and the lower Z-axis sliding surface (1c, 1d), the first fixed cover 6 is fixed in parallel to the Z-axis sliding surface, and the upper guide of the lower Z-axis sliding surface. The second fixed cover 7 is fixed between the surface 1c and the lower guide surface 1d in parallel with the Z-axis sliding surface.

A first movable cover 8 and a second movable cover 9 for covering the upper guide surface 1c and the lower guide surface 1d are fixed to the left end of the saddle 3, and the first movable cover 8 is a first fixed cover 6
The upper end is movably overlapped with the lower side, and the left end is the headstock 5
The second moving cover 9 penetrates the lower hole 5a, the upper end of the second moving cover 9 is movably overlapped with the lower side of the second fixed cover 7, and the left end of the second moving cover 9 can protrude to the left through the hole 5b below the headstock 5. It has become.

Further, a third movable cover 11 covering the upper guide surface 1c and a fourth movable cover 12 covering the lower guide surface 1d are fixed to the right end of the saddle 3, and the third movable cover 11 is a first fixed cover. 6 is movably overlapped with the lower end of the fourth moving cover 12, and the right end thereof passes through the hole 4 a of the tailstock 4.
Is adapted to be projected on the right side a second upper end to the lower side of the fixed cover 7 is overlapped on the movable, right end passes through the bottom of the tailstock 4.

Further, a fifth moving cover 13 is fixed to the left end face of the tailstock 4. The fifth moving cover 13 has an upper end movably overlapping below the first fixed cover 6 and a lower end. The first movable cover 8 and the third movable cover 11 are movably overlapped with each other, and the leading end of the first movable cover 8 and the third movable cover 11 can protrude leftward through the hole 5a below the headstock 5. Further, a second fixed cover 7 and a third movable cover 1 are provided on the right end face of the tailstock 4.
A seventh moving cover 14 that covers the upper part of the fourth moving cover 12 and whose upper end is movably overlapped with the lower end of the first fixed cover 6 is fixed.

Wipers (not shown) are attached to the holes 5a and 5b below the headstock and the holes 4a and side surfaces of the tailstock 4, so that chips or cutting fluid on the cover penetrating through the holes can be removed. ing. In the above cover configuration, only the headstock side is the entire cover, and a part of the lower guide surface 1d is exposed between the headstock 5 and the tailstock 4.

FIG. 4 shows a sixth movable cover 15 attached to the left side of the tailstock 4 to cover the exposed portion and form a complete cover. The upper end of the sixth movable cover 15 is movably overlapped with the lower side of the fourth movable cover 12, and the left end of the sixth movable cover 15 is movably overlapped under the second movable cover 9 through the hole 3 a of the lower saddle 3. In this state, it penetrates through the hole 5b below the headstock 5.

According to the Z-axis sliding surface cover configured as described above, the upper guide surface 1c and the lower guide surface 1d can always be covered without hindering the Z-axis movement of the saddle 3 and the tailstock 4. All chips and cutting fluid that fall during the cutting process flow down on the cover, and can completely protect the lower sliding surfaces 1c and 1d. Further, since the wiper is provided in each hole penetrating through each cover, chips and cutting fluid do not flow out of the machine, and chips are not clogged in the holes.

[0018]

Since the present invention is configured as described above, the following effects can be obtained. A lower Z-axis sliding surface cover for a four-axis control lathe is fixed to a bed, first and second fixed covers, first to fourth movable covers fixed to the left and right sides of a saddle, and a tailstock. Constructed by a fifth moving cover fixed on the left side, each of them overlaps each other to cover most of the lower Z-axis sliding surface, and is protected from cutting chips and cutting fluid, so maintenance is required at low cost. Thus, a Z-axis sliding surface protection cover that is shared by the saddle and tailstock without limiting other functions can be achieved.

According to a second aspect of the present invention, the sixth movable cover is provided on the tailstock so as to cover only a part of the lower guide surface which is only exposed. A sliding surface protection cover becomes possible.

[Brief description of the drawings]

FIG. 1 is a top view of a lower Z-axis sliding surface cover of a 4-axis NC lathe according to the present embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a view showing a case in which a sixth movable cover is provided on a tailstock to provide a complete cover.

FIG. 5 is a front view of a chip-preventing cover using a bendable plate according to the related art.

[Explanation of symbols]

Reference Signs List 1 Bed 1c Upper guide surface of lower Z-axis sliding surface 1d Lower guide surface of lower Z-axis sliding surface 3 Lower saddle 3a Saddle hole (fourth hole) 4 Tailstock 4a Tailstock hole (Third hole) 5 Headstock 5a Hole under headstock (first hole) 5b Hole under headstock (second hole) 6 First fixed cover 7 Second fixed cover 8 First moving cover 9 Second moving cover 11 Third moving cover 12 Fourth moving cover 13 Fifth moving cover 15 Sixth moving cover

Claims (2)

(57) [Claims] 1. In a slant bed of a four-axis control lathe
Of the two pairs of upper and lower Z-axis sliding surfaces, the saddle and the tailstock are used in common . <br/> A pair of lower and upper Z-axis sliding surfaces are protective covers for the rear guiding surface and the front guiding surface. The lower Z-axis sliding surface and the upper Z
A first fixed cover is provided between the shaft sliding surfaces, a second fixed cover is provided between the rear guide surface and the front guide surface, and the first fixed cover penetrates a first hole below the headstock and is provided on the second fixed cover. A first movable cover for the rear guide surface, which partially overlaps with the second guide cover; and a second movable cover for the front guide surface, which partially passes through the second hole below the headstock and under the second fixed cover. A third moving cover for a rear guide surface, which is provided at a left end of the saddle, penetrates a third hole of the tailstock and partially overlaps with a distance on the second fixed cover, and the tailstock. At the right end of the saddle, a fourth moving cover for the front guide surface that partially passes under the second fixed cover and penetrates below the second fixed cover, and partially overlaps under the first fixed cover. A Z-axis of a lathe having a fifth moving cover partially overlapping on the moving cover and the third moving cover at the left end of the tailstock; Sliding surface cover. 2. A sixth moving cover, which penetrates the fourth hole of the saddle and the second hole below the headstock, partially overlaps under the fourth moving cover, and has a tip portion overlapping under the second moving cover. Z Jikusuridomen cover lathe according to claim 1 formed by providing the left end of the tail stock.