JPS6140440Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the body of a machining center.

Conventionally, the machine of a machining center has a housing-shaped machine stand on one side of a workpiece table A that can slide on the machine table a in the horizontal direction, that is, the X-axis direction, as shown in Fig. 1.
b', a machine column B' that can move in the Y-axis direction perpendicular to the X-axis direction in the horizontal direction is provided on the machine base b', and a spindle head C for holding a tool is provided on the machine column B'. There is a tool that can be moved up and down in the Z-axis direction, which is the vertical direction, but the tool shown in Figure 1 requires a complicated mechanism for the tool changer to be a tool changer type, and it also has to act on the spindle. Since the cutting thrust acts on the spindle head C that protrudes in a cantilevered manner, the reaction force acting on the root of the machine column B' near the workpiece table is large, causing the machine column B' and the casing-shaped machine table B' to move with force. High accuracy cannot be obtained unless the size is large, and the weight is also large.
As the machine column B' becomes larger, the device for moving the machine column B' in the Y-axis direction must also be sturdy, and since the sliding surface in the Y-axis direction is below the lower end of the spindle head, the sliding surface must be There were drawbacks such as the need to take measures against chips.

The purpose of this invention is to provide a machine for a machining center that can eliminate the above-mentioned drawbacks.

The structure of the machine body of the machining center according to this invention will be explained based on the conceptual diagram shown in FIG. It has an opening 1 on the side facing the worktable A, and has protrusions 2, 2 on both sides of the opening 1 extending over the workpiece A, and has a hollow space inside. A pair of sliding surfaces 4, 4 provided in the Y-axis direction orthogonal to the X-axis direction on the upper surface of the housing-type machine base b ₁ provided with the chamber 3 have a yoke-shaped notch 5 at the tip. A sliding table 6 is provided to be slidable in the Y-axis direction, and a spindle head C of a drill or the like is fitted and held in the notch 5 of the sliding table 6 so as to be able to move up and down.
The spindle head C can be raised and lowered by a motor c provided on the sliding table 6, and reinforcing bodies 7 are fixed to the end faces of the sleeves 6', 6' on both sides of the yoke-shaped notch 5. In the empty space 3 of the housing-type machine base _b1 , a replacement tool storage device is provided so that replacement tools can be taken in and out of the rotary plate in a radial direction.

To describe the configuration in more detail based on the embodiment shown in FIGS. 3 and 4, on one side of the machine platform a that supports the work platform A that can slide in the X-axis direction, A case that has an opening 1 on the facing side, has protrusions 2, 2 extending over the worktable A on both sides of the opening 1, and has a vacant chamber 3 inside. type machine stand b ₁
A sliding table 6 having a yoke-shaped notch 5 at the tip on the sliding surfaces 4, 4 provided on the upper surface in the Y-axis direction perpendicular to the X-axis direction in the horizontal direction is slid in the Y-axis direction. A spindle head C of a tool is fitted and held in the notch 5 of the sliding table 6 so as to be able to move up and down, and a motor c provided on the sliding table 6 moves the spindle head C into the notch 5 of the sliding table 6. It is made to be able to move up and down in the Z-axis direction, which is a vertical direction perpendicular to the axial direction and the Y-axis direction, and reinforcing bodies 7 are fixed to the end faces of the sleeve parts 6', 6' on both sides of the yoke-shaped cutout part 5.
A replacement tool storage device D is provided in the empty chamber 3 of the housing-type machine base b ₁ so that replacement tools 10 can be taken in and out in a radial direction through grooves 12 provided radially on the rotary plate 11.
It is designed so that it can be stored.

In addition, the configuration of the sliding surfaces 4, 4 on which the slide table 6 slides in the Y-axis direction on the housing-type machine base b ₁ , and the configuration of the slide surfaces 4, 4 on which the slide table 6 slides in the Y-axis direction, and the spindle head C in the notch 5 of the slide table 6 in the Z-axis direction. As shown in FIG. 5, the structure of the elevating and descending sliding surfaces is as follows: a pair of shaft bearing pieces 13, 13, 14, and 14 are provided on the slide table 6 side or on the spindle head C side, respectively. It is preferable to receive the rail (see 4' in Fig. 4). Furthermore, in the figure, 15 indicates a motor for driving the spindle e provided in the spindle head C, and 16 indicates a motor for moving the slide table 6 in the Y-axis direction.

Since this embodiment has the configuration as described above,
As shown in Figure 6, the conventional machine column type B (shown in Figure 1) and the one related to this invention are:
Part B shows that the spindle head C is cantilevered from the machine pillar B', and part A shows that the spindle head C is cantilevered from the housing-type machine stand _B1 through the sliding table 6. The points appearing in are the same, but now when the spindle e performs cutting with the length l ₁ of the cantilever beam being the same, the reaction force W ₁ generated at the lower front end of the machine column B'
Reaction force generated at the tip of the protruding part 2 of the housing type machine base b ₁ of the instep
W ₂ and the machine pillar from each spindle e for both A and B.
Considering the distances to the rear wall of B' and the housing type machine stand b ₁ to be equal L, the reaction force W ₁ at B is as follows: When the cutting thrust at spindle e is W, W ₁ = WL/l ₂ In contrast, the reaction force of the end face of the protrusion 2 on the instep
W ₂ is W ₂ = WL/l ₄ Therefore, the reaction force W ₂ at A is the reaction force W ₁ at B
Finding the ratio to Then, the reaction force at the instep is increased by the protrusion amount l of the protrusion 2.
W ₂ is smaller than the reaction force W ₁ at B, making it possible to reduce the weight of the aircraft, making it possible to create a highly rigid and high-precision aircraft, and making the sliding table 6 in the Y-axis direction lighter compared to B. Therefore, the Y-axis direction movement mechanism can be easily created, and since the sliding surface 4 of the housing type machine base _b1 is located above the position where the tool attached to the spindle performs cutting work, the sliding surface 4 can be easily created. There is no need to take measures against chips, and since there is a vacant chamber 3 inside the housing-type machine stand b ₁ , as shown in Fig. 3,
As shown in FIG. 4, a rotating disk 11 is provided, and grooves 12 are provided radially on the rotating disk, and a replacement tool storage device D can be easily assembled into the groove 12 in which a replacement tool 10 can be taken in and out in the radial direction. _The spindle head C
The spindle e can easily enter the space 3 through the opening 1, and the spindle e can directly pick up a replacement tool, thus simplifying the entire tool replacement device. Since it is housed in the yoke-shaped notch 5 of the moving table 6 and the yoke-shaped portion is fixed with the reinforcing body 7, the sliding table 6 can be made lightweight.

Since this device has the above-mentioned configuration and function, it is lighter, more rigid, and has higher precision than the conventional machines of machine tools such as drills, and it is effective against chips on sliding surfaces other than work table A. To eliminate the need for a tool changer, to have a tool changer with a simple configuration, to be easily stored, to reduce the reaction force generated by the cutting thrust of the spindle, and to have a structure that is strong against vertical loads. We can provide machines for machining centers that can do this.

[Brief explanation of the drawing]

Figure 1 is a conceptual diagram showing the configuration of the machine of a conventional column-type machining center, Figure 2 is a conceptual diagram showing the configuration of the machine of a machining center according to this invention, and Figure 3 is an implementation of this invention. Example perspective view, 4th
The figure is a partially vertical front view, FIG. 5 is an exploded perspective view showing the structure of the sliding surface between the housing type machine base b ₁ and the sliding table 6, and FIG. 6 is an explanatory diagram of the effect of the protrusion in this invention. are shown respectively, A is the work table, C is the spindle head, and D
is a replacement tool storage device, a is a machine base, b ₁ is a housing type machine base, 1 is an opening, 2 is a protrusion, 3 is a vacant space, 4 is a sliding surface, 5 is a notch, 6 is a sliding stand, 7 is reinforcement body, 1
0 indicates a replacement rotary tool, and 11 indicates a rotating disc.

Claims (1)

[Scope of utility model registration request] Worktable A is installed so that it can slide in the horizontal X-axis direction.
A protrusion that has an opening 1 on one side of the machine platform A supporting the work platform A, and has an opening 1 on the side facing the work platform A, and both sides of the opening 1 protrude over the work platform A. 1 provided in the horizontal Y-axis direction orthogonal to the X-axis direction on the upper surface of the housing-type machine base b ₁ , which has portions 2 and 2 and is provided with a vacant chamber 3 that communicates with the opening 1; A sliding table 6 having a yoke-shaped notch 5 at the tip of the worktable A side is provided on the pair of sliding surfaces 4, 4 so as to be slidable in the Y-axis direction. The spindle head C of the tool is placed in the notch 5 so that it can be moved up and down in the Z-axis direction perpendicular to the X and Y axes, and the end surfaces of the sleeves 6', 6' on both sides of the yoke-shaped notch 5 are provided. A reinforcing body 7 is fixed thereto, and a replacement tool 10 is provided in the empty chamber 3 of the housing-type machine base _b1 so that it can be moved in and out of the rotation plate 11 that rotates in the horizontal direction in a radial direction. A machine body of a machining center characterized by being able to store a tool storage device D.