JPS6137472Y2 - - Google Patents

Description

Detailed Description of the Invention This invention relates to a combination bed for a machine tool.

The bed of machine tools such as lathes and milling machines is
The oil tank and pump are formed as a single unit with a horizontal top surface and are used for cooling cutlery and hydraulically feeding.
It is installed separately on the side or rear of the bed to prevent heat from the tank from being conducted to the bed. Therefore, a large space was required to install the machine tools. In machines such as centering machines that have a milling head at the front of the bed and a drilling head at the rear, the operator can reach the milling head at the front, but the drill at the other side cannot reach the milling head at the front. Since the machining head is inaccessible, for example, when exchanging tools in the drilling head, the operator must go to the rear of the bed, which is troublesome and impedes work efficiency. In addition, since the bed is horizontal, the flow of chips is poor and the chips pile up on the bed, requiring repeated work to remove them. In addition, if the above-mentioned oil tank is formed integrally at the bottom of the bed in order to reduce the installation area and smooth the flow of chips, and the top surface of the bed is formed in a downward-sloping shape, the above-mentioned bed is heated by heat transfer from the oil tank, causing distortion in the bed due to thermal expansion, resulting in a problem in that machining accuracy decreases.

This design reduces the installation area, allows access to the drilling head on the opposite side, especially in the case of centering machines, allows smooth flow of chips, and prevents bed distortion. .

Examples of this invention will be described below with reference to the drawings. Note that this embodiment is for a centering machine.

In FIGS. 1 to 4, 1 is a box-shaped base formed of a steel plate in the shape of a rectangular parallelepiped box,
Inside, a hydraulic tank 2 is formed by an L-shaped partition plate 2a on the rear left side, and a cutting oil tank 3 is formed by an L-shaped partition plate 3a on the rear right side. A cover plate 4 (see FIGS. 2 and 4) having a window 4a on the upper surface thereof is fixed. Note that the front space 1a formed by the partition plates 2a and 3a is used as a chip receiver. A trapezoidal shape consisting of a bottom plate of the box-shaped base 1, a pair of left and right side plates 5, 5, a back plate 6 connecting the backs and upper ends of the side plates 5, 5, respectively, and a rear base plate 7 whose upper surface is horizontal. An inclined support stand 8 is erected. The above-mentioned side plate 5 has a lower half located within the box-shaped base 1, which is formed in a rectangular shape that crosses the box-shaped base 1 back and forth, and communicates with the portion located within the hydraulic tank 2 and the cutting oil tank 3. A hole 5a (see FIGS. 3 and 4) is drilled, and the partition plate 2
The upper half portions projecting upward from the portions rearward of the front edges of a and 3a are formed into a substantially right triangular shape (see FIG. 3), with the oblique sides thereof facing forward. Note that the back plate 6 is provided with a window hole 6a. The front upper edges of the left and right side plates 5, 5 are connected by a stay 9 in the width direction, and this stay 9 and the front plate of the box-shaped base 1 are connected to a pair of left and right auxiliary stays 9.
a, 9a, and a front base plate 10 having an L-shaped cross section is attached to the upper surface of these connecting portions, and its rising portion 10a
(See Figure 3) is fixed facing forward.

The upper bed 11 mounted on the above-mentioned inclined support stand 8 is cast from cast iron or cast steel, and has an upper surface 11a that is inclined forwardly downward at approximately 45 degrees.
The upper surface 11a has a large number of bolt holes 11b for attaching various parts such as a milling unit and a drilling unit (none of which are shown), and the lower surface has a large number of ribs. 11c and 11d (see FIG. 3) are provided in a protruding manner. And legs 11 protruding from the front left and right
e, 11e and a leg 11f protruding from the rear center
are placed on each horizontal portion of the base plates 10, 10, and 7 of the inclined support base 8, and are connected lightly to the extent that sliding in all directions within a predetermined range is permitted. That is, the front left and right legs 11e are placed on the base plate 10 via jack bolts 12 (see FIG. 5) fixed to the legs 11e, and are horizontally planted on the rising portion 10a of the base plate 10. The tip of the holding bolt 13 is the leg 11
By contacting the front surface of e, the jack bolt 1
2 forward sliding is inhibited. On the other hand, the rear center leg 11f is placed at the center of the base plate 7 at the rear upper part of the inclined support base 8 via a jack bolt 14 (see FIG. 6) fixed to the center thereof, and the left and right ends of the leg 11f are The downwardly protruding ends of the pair of left and right connecting bolts 15, 15 are inserted into holes with large play drilled in the base plate 7, and within this play, the tips of the jack bolts 14 are inserted in all directions. Sliding is now allowed.

In the above structure, the upper surface 1 of the upper bed 11
A centering machine is formed by fixing a milling unit, a drilling unit, a slideway, etc. to 1a, and fixing a hydraulic pump and motor, and a cutting oil pump and motor to the top surface of the box-shaped base 1, respectively. . At this time, the upper surface 11a of the upper bed 11 is lowered forward approximately.
Since it is slanted at 45 degrees, the depth is shortened, and the operator can easily reach the drilling unit located at the rear, without having to go to the rear to change tools. Further, the upper bed 11 is tilted forward and downward, the front part of the box-shaped base 1 protrudes forward from the front edge of the upper bed 11, and the chip receiver 1a is formed in the front part of the box-shaped base 1. Therefore, chips generated during machining fall into the chip receiver 1a due to their own weight. By inserting a chip conveyor (not shown) into the chip receiver 1a through the window hole 6a of the back plate 6 of the inclined support base 8, the chips can be automatically discharged. Further, since the upper bed 11 is inclined forward and downward, and the hydraulic tank 2 and the cutting oil tank 3 are formed in the box-shaped base 1 below the upper bed 11, the installation area can be saved. Furthermore, the upper bed 11 is attached to the leg 11 on the inclined support base 8.
Since it is mounted at three points e, 11e, and 11f, if thermal expansion of the box-shaped base 1 occurs, the forward movement of the front left and right legs 11e and 11e will cause the holding bolts of the rising portion 10a of the base plate 10 to move forward. 13, the tips of the three jack bolts 12, 12, and 14 slide against the base plates 10, 10, and 7 by a distance corresponding to the magnitude of the thermal expansion, so that the upper bed 11 No distortion occurs, and machining accuracy does not deteriorate.

In the above embodiment, the upper surface 11a of the upper bed 11 is not limited to a smooth surface, but may be provided with grooves or protrusions so that a machining head of a lathe, a milling machine, etc. can be attached thereto according to the purpose of machining.
Further, the positions of the hydraulic tank 2 and the cutting oil tank 3 can be exchanged on the left and right. Further, the means for fixing the upper bed 11 on the inclined support table 8 is to support the upper bed 11 at three points, and the joint surface thereof slides due to thermal expansion or thermal contraction of the inclined support table 8 or the upper bed 11. You can choose any method you like.

As explained above, this idea is based on the front of the top surface of the box-shaped base, which is formed in the shape of a rectangular parallelepiped and whose interior is divided into a cutting oil tank and a hydraulic tank on the rear left and right sides, and a chip receiver at the front. The front base plate is placed on the left and right sides of the unit.
In addition, rear baseplates are installed at the center of the rear via inclined support bases that protrude upwards, and on the horizontal parts of the three baseplates on the left and right of the front and the center of the rear, the upper surfaces are used to hold various components such as processing units and slide bases. The upper bed formed on the mounting surface for attaching the upper bed is slidable in all directions via the three legs provided on the lower surface corresponding to the three base plates mentioned above, and the upper bed is formed on the mounting surface. Since it is mounted so that the front part is lower and the sliding movement is limited to a predetermined range, the installation area is small, and a worker standing in front of the box-shaped base can easily reach the rear part of the upper bed. This makes the work easier, the chips flow smoothly and can be easily collected, and there is a temperature difference between the upper bed and the box-shaped base or inclined support. In this case, thermal expansion and contraction are absorbed by the sliding motion between the legs of the upper bed and the base plate, preventing distortion of the upper bed. Machining accuracy does not decrease at all.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of this invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 1, Fig. 4 is a sectional view taken along the - line in Fig. 3, FIG. 5 is a side view of the front base plate, and FIG. 6 is a rear view of the rear base plate. 1: Box base, 1a: Chip receiver, 2: Hydraulic tank, 3: Cutting oil tank, 7: Rear base plate, 8:
Inclined support base, 10: Front base plate, 11: Upper bed, 11a: Upper surface (mounting surface) 11e, 11f:
leg.

Claims (1)

[Scope of utility model registration request] The box-shaped base is shaped like a rectangular parallelepiped, and the interior is divided into a cutting oil tank and a hydraulic tank on the rear left and right sides, and a chip receiver on the front. Rear bed plates are provided at the center of the rear via inclined support stands that protrude upward, and on the horizontal parts of the three base plates on the left and right of the front and the center of the rear,
The upper bed, whose upper surface is formed as a mounting surface for attaching various components such as the processing unit and slide base, is attached to the lower surface of the upper bed from all sides through three legs provided corresponding to the three base plates mentioned above. 1. A combination bed for a machine tool, characterized in that the bed is placed so as to be able to freely slide on the mounting surface, with the front portion of the mounting surface being lowered, and the sliding movement is limited to a predetermined range.