FR3058347A1 - MACHINE-TOOL MACHINING - Google Patents

Abstract

The invention relates to a machine tool (M) comprising a frame (100) with respect to which at least one horizontal tool-holder spindle (210) moves linearly along at least two perpendicular horizontal axes, one of which is parallel to the spindle axis, at least one workpiece carrier (310, 320) to be machined (P1, P2) moving vertically relative to the frame (100) on vertical guide rails (110), is remarkable in that said frame (100) is preformed to form a vertical front facade (120) perpendicular to the axis of the spindle, said vertical facade (120) accommodating said vertical guide rails (110) of the carriage (310, 320) machine (P1, P2). Applications: machine tool machining.

Description

Holder (s): COMAU FRANCE Simplified joint-stock company.

Extension request (s)

Agent (s): COLBERT INNOVATION TOULOUSE.

FR 3 058 347 - A1 (54j MACHINERY TOOLS.

(57) The invention relates to a machine tool (M) comprising a frame (100) relative to which linearly moves at least one horizontal tool-holder spindle (210) along at least two perpendicular horizontal axes, one of which is parallel at the axis of the spindle, at least one carriage (310, 320) workpiece carrier (P 1, P2) moving vertically relative to the frame (100) on vertical guide rails (110), is remarkable in that said frame (100) is preformed to form a vertical front face (120) perpendicular to the axis of the spindle, said vertical face (120) receiving said vertical guide rails (110) of the carriage (310, 320) workpiece carrier (P1, P2).

Applications: machine tool machining.

-1 MACHINE TOOL

FIELD OF APPLICATION OF THE INVENTION

The present invention relates to the field of machining machine tools and in particular to the adaptations of their architecture to enable machining, operation and maintenance operations to be carried out under the best conditions.

DESCRIPTION OF THE PRIOR ART

It is known in the prior art machine tool architectures comprising a vertical support on which a workpiece carrier trolley is positioned for vertical linear movement. The document DE2653928 describes such an architecture.

The machine tool proposed in this document comprises a frame equipped with a tool-holder spindle which is linearly displaceable along two perpendicular horizontal axes, one of the axes having a direction parallel to the axis of the spindle. The vertical movement of the workpiece is implemented by a vertical portion of the frame positioned in front of the spindle head and offering vertical guidance to the workpiece carrier carriage. Said vertical guide is produced along a vertical plane parallel to the axis of the spindle and perpendicular to the axis of horizontal transverse movement of the spindle. The guide rails are arranged on this vertical plane.

In such a configuration with vertical displacement under the workpiece, considering that the workpiece and the spindle are oriented horizontally, the chips and possibly the cutting liquid generated during machining fall freely without interfering with the workpiece carrier or its means for guiding and setting in motion.

Such an implementation of a vertical displacement for the workpiece carrier by the creation of an additional vertical portion in front of the spindle, nevertheless has drawbacks, among these:

this additional portion has a consequent;

clutter

- 2- the geometric (stiffness problem) and thermal (thermal difference problem in the constituent elements of the machine tool) stability is reduced;

the peripheral accessibility of the main organs of the machine tool is reduced;

- visibility is also reduced;

falling chips and that of the cutting liquid are facilitated but their evacuation is not because of the presence of a column on one side of the machining station.

DESCRIPTION OF THE INVENTION

What finding, the Applicant has conducted research aimed at solving the disadvantages of the prior art.

This research has led to the design and production of a new machine tool with an optimized architecture which overcomes these drawbacks.

This machining machine tool comprises a frame with respect to which linearly moves at least one horizontal tool-holder spindle along at least two perpendicular horizontal axes, one parallel to the axis of the spindle, at least one workpiece carrier machining moving vertically with respect to the frame on vertical guide rails. It is remarkable in that said frame is preformed to form a vertical front facade perpendicular to the axis of the spindle, said vertical facade receiving said vertical guide rails of the workpiece carrier carriage.

The workpiece carrier trolley therefore moves vertically directly on the front face of the machine tool. The vertical displacement plane is therefore perpendicular to the axis of the spindle.

Such an arrangement makes it possible to propose a new structure of a machine tool for machining in which only the workpiece carrier carriage projects from the front face of the machine tool from which one end of the tool holder spindle projects. . Such a structure is more open than the already existing structures and overcomes the drawbacks of the prior art.

Indeed, the proposed structure avoids the presence of a vertical portion projecting from the facade for the purpose of guiding the carriage. Thus, the implementation proposed by the invention of vertical displacement under the part requires a reduced bulk.

-3 In addition, direct guidance on the front of the machine tool reduces distances and increases stiffness. Thus, both the geometric and thermal stability is optimized.

In addition, the absence of a column facilitates peripheral access, both lateral and frontal, ensuring easy maintenance and increased visibility.

Finally, the absence of sub-assemblies other than the workpiece carrier at the front of the machine allows the latter to receive any type of equipment (for the transverse evacuation of chips in the lower part for example) or integrate into any type of configuration (to bring and evacuate the parts to be machined for example).

According to another particularly advantageous characteristic of the invention, said workpiece carrier carriage comprises a workpiece carrier module movable in rotation relative to the carriage. This mobility increases the capacities of the machine tool for the machining operations to be carried out. According to a preferred but nonlimiting embodiment, the workpiece carrier module is movable in rotation about a horizontal axis perpendicular to the axis of the spindle. According to another preferred embodiment, whether or not in addition to the previous one, the workpiece carrier module is movable in rotation about a vertical axis perpendicular to the axis of the spindle.

The machine tool has just been described with at least one workpiece carrier. According to another particularly advantageous characteristic of the invention, the machine tool comprises two workpiece carriers which makes it possible to increase the efficiency of such a machine. Indeed, for example in a configuration with a single spindle and two supported parts, the spindle can machine a first part while the other is loaded / unloaded. Thus, in such a form of tilting work, the loading time and

unloading is hidden. According to a mode of favorite achievement, these carts are arranged on the facade of the hand machine tool and else of the brooch.

According to another particularly advantageous characteristic of the invention, the two workpiece carriers are synchronized in their movements.

According to another particularly advantageous characteristic of the invention, the two workpiece carriers are not synchronized in their movements.

According to another particularly advantageous characteristic of the invention, the two workpiece carriers are linked by a workpiece table movable in rotation about an axis perpendicular to the axis of the spindle. This workpiece table constitutes the workpiece module and allows to support heavier parts or a plurality of parts. Indeed, according to another particularly advantageous characteristic of the invention, several workpieces are supported by the workpiece carrier.

This multiplication of the number of parts or the number of axes of rotation for the part or parts comes in line with another particularly advantageous characteristic of the invention, namely that the machine tool comprises a second tool-holder spindle arranged parallel to the first one. The productivity of such a machine is thus optimized.

According to another particularly advantageous characteristic of the invention, the two spindles are synchronized in their movement on at least one axis of linear movement. Such a characteristic makes it possible to carry out machining operations simultaneously on the same part or on identical closely spaced parts.

According to another particularly advantageous characteristic of the invention, the two spindles are not synchronized and move independently of one another on their two linear axes of movement. Such a characteristic makes it possible to carry out simultaneous machining on different parts or on parts of distant parts.

According to another particularly advantageous characteristic of the invention, the two pins are movable relative to each other to allow the adjustment of their spacing during a synchronized configuration.

Still in order to optimize the productivity of such a machine tool, the drive of the linearly movable sub-assemblies is implemented by linear motors on at least one axis. According to another characteristic coming in addition or not from the previous one, the drive of the linearly movable sub-assemblies is implemented by ball screw motorizations on at least

-5 an axis. The machining proposed by the machine tool of the invention is therefore of the high speed type. In order to allow great acceleration on the vertical axis, according to another particularly advantageous characteristic of the invention, the workpiece carrier is set in motion by linear motors arranged back-to-back.

In order to guarantee great rigidity, according to another particularly advantageous characteristic, the frame of the machine tool is in one piece. This frame can be produced according to the following embodiments:

- cast iron casting,

- mechanical welding of steel,

- mineral cast.

According to another particularly advantageous characteristic of the invention, the geometry of the linear axes is obtained either by adjusting the guide rails or by precise machining of the frame.

The fundamental concepts of the invention having just been exposed above in their most elementary form, other details and characteristics will emerge more clearly on reading the description which follows and with reference to the appended drawings, giving by way of 'nonlimiting example, an embodiment of a machine tool in accordance with the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic drawing of a perspective view of an embodiment of a machine tool in accordance with the invention,

FIG. 2 is a schematic drawing of a perspective view of an embodiment of the frame alone,

FIG. 3 is a schematic drawing of a side view in section at the level of the axis of a spindle of the machine tool,

Figure 4 is a schematic drawing of a top view in section.

DESCRIPTION OF A PREFERRED EMBODIMENT

As illustrated in the drawings of Figures 1, 3 and 4, the machine tool referenced M as a whole comprises a frame 100 relative to which move linearly two spindles 210 and 220 tool holder with horizontal axis. These two pins 210 and 220 rotate a tool (not illustrated) and move in

- 6translation along two perpendicular horizontal axes X and Z only.

The machine tool M further comprises two synchronized workpiece carriers 310 and 320 connected by a workpiece support table 330 (cf. FIG. 4). This table 330 supports two parts Pi and P2 to be machined.

This workpiece carrier module formed by the two carriages 310 and 320 and the table 330 moves vertically (axis Y) relative to the frame 100 on vertical guide rails 110 (cf. FIGS. 3 and 4).

According to the invention, said frame 100 is preformed to form a vertical front face 120 perpendicular to the axis of pins 210 and 220, that is to say that the front face of the machine tool M has portions parallel to the vertical plane defined by the X and Y axes.

As illustrated in the drawings of FIGS. 1 and 2, this vertical facade 120 is hollowed out in its center by a window 121 where the two pins 210 and 220 evolve. This window 121 is framed laterally and in the lower part by portions of the facade 120 More precisely, it is bordered on these sides by two vertical portions 122 and 123 of the facade and on its lower part by a horizontal portion 124 of the facade.

The portions 122, 123 and 124 are coplanar. In accordance with the invention, the vertical portions 122 and 123 of the facade 120 receive said rails 110 for the vertical guide of the work carriages 310 and 320. More particularly, each vertical portion 122 and 123 receives a pair of vertical rails 110.

According to the preferred but nonlimiting embodiment illustrated, the obviously formed by the window 121 in the facade 120 extends rearward to define in the frame surfaces surrounding the machining station, namely:

- two lateral vertical flanges 125 and 126,

- an inclined lower surface 127,

- and a rear vertical surface 128.

In addition, it is itself provided with a window 130 in which said pins 210 and 220 evolve and opening onto a rear facade 131. The rear facade 131 linked to this window 130 supports a rail 132 for horizontal transverse guide of the movement in translation of the spindles along the X axis.

The frame 100 comprises a rear part 140 formed with a horizontal surface 141 on which is installed another rail 142 for transverse horizontal guiding of the movement in translation of the pins along the axis X.

On each pair of rails moves a workpiece carrier 310 and 320. According to the illustrated embodiment, these carriages 310 and 320 are synchronized and ensure rotation along a horizontal axis A perpendicular to the axis of pins 210 and 220 ( and therefore parallel to the axis X) of a workpiece support table 330 which connects them. These carriages 310 and 320 form a projection relative to the front of the machine tool M and frame the machining station itself but leave free the volumes arranged below and above. In addition, the lateral accesses are also facilitated. It is understood that such a machine tool structure M is capable of being integrated into all possible configurations as regards the workshop in which it operates:

- closed machining cabin,

- cooperation with a front / top part loader,

- cooperation with a lateral part transfer means,

- etc ...

According to the illustrated embodiment, the lower part disposed under the carriages 310 and 320 is advantageously used to accommodate a means for evacuating the chips 400.

The illustrated embodiment also includes, in the upper part of the frame, two rotary tool magazines 510 and 520 arranged horizontally. These stores are advantageously arranged at an ergonomic height, being able to be loaded without a complex assistance system.

According to an embodiment not shown, the tool magazine or magazines are arranged vertically.

As illustrated in the drawing of FIG. 2, the frame 100 has a one-piece structure providing great rigidity to the machine tool M and accommodating the movement rails of the various mobile sub-assemblies.

As illustrated in the drawing in FIG. 4, the drive of the linearly movable sub-assemblies is implemented by linear motors. In addition, the workpiece carriers 310 and 320 are set in motion by linear motors arranged back-to-back.

- 8On understand that the machine tool, which has just been described and shown above, was for disclosure rather than limitation. Of course, various arrangements, modifications and improvements could be made to the example above, without however departing from the scope of the invention.

Thus, for example, the expression “workpiece” must be understood as being able to designate the single piece, the piece associated with an adapter, the piece associated with a pallet, etc.

Claims (14)

1. Machining machine tool (M) comprising a frame (100) relative to which linearly moves at least one horizontal tool-holder spindle (210) along at least two perpendicular horizontal axes, one parallel to the axis of the spindle, at least one carriage (310, 320) workpiece carrier (Pl, P2) moving vertically relative to the frame (100) on vertical guide rails (110), CHARACTERIZED BY THE FACT THAT said frame (100) is preformed to form a vertical front face (120) perpendicular to the axis of the spindle, said vertical face (120) receiving said vertical guide rails (110) of the carriage (310, 320) work piece holder (Pl, P2). 2. Machine tool (M) according to claim 1, CHARACTERIZED BY THE FACT THAT it comprises a second tool-holder spindle (220) arranged parallel to the first (210). 3. Machine tool (M) according to claim 2, CHARACTERIZED BY THE FACT THAT the two spindles (210, 220) are synchronized in their movement on at least one axis of linear movement. 4. Machine tool (M) according to claim 2, CHARACTERIZED BY THE FACT THAT the two spindles (210, 220) move independently of one another on their two linear axes of movement. 5. Machine tool (M) according to claim 2, CHARACTERIZED BY THE FACT THAT the two spindles (210, 220) are movable relative to each other to allow the adjustment of their spacing during a synchronized configuration . 6. Machine tool (M) according to claim 1, CHARACTERIZED BY THE FACT THAT the frame (100) is in one piece. 7. Machine tool (M) according to claim 1, CHARACTERIZED BY THE FACT THAT said carriage (310, 320) workpiece carrier to be machined (Pl, P2) comprises a workpiece carrier module movable in rotation relative to the carriage (310 , 320). 8. Machine tool (M) according to claim 7, CHARACTERIZED BY THE FACT THAT the workpiece module is movable in rotation about a horizontal axis perpendicular to the axis of the spindle. -109. Machine tool (M) according to claim 7 or 8, CHARACTERIZED BY THE FACT THAT the workpiece module is movable in rotation about a vertical axis perpendicular to the axis of the spindle. 10. Machine tool (M) according to claim 1, CHARACTERIZED BY THE FACT THAT it comprises two workpiece carriers (310, 320). 11. Machine tool (M) according to claims 10, CHARACTERIZED BY THE FACT THAT the two workpiece carriers (310, 320) are linked by a workpiece table (330) movable in rotation about a horizontal axis perpendicular to the spindle axis. 12. Machine tool (M) according to claim 1, CHARACTERIZED BY THE FACT THAT the drive of the linearly movable subassemblies is implemented by linear motors on at least one axis. 13. Machine tool (M) according to claim 1, CHARACTERIZED BY THE FACT THAT the drive of the linearly movable subassemblies is implemented by ball screw drives on at least one axis. 14. Machine tool (M) according to claim 1, CHARACTERIZED BY THE FACT THAT several workpieces (Pi, P2) are supported by the workpiece carrier (310, 320). 15. Machine tool (M) according to claim 1, CHARACTERIZED BY THE FACT THAT the workpiece carrier (310, 320) is set in motion by linear motors arranged back-to-back. ο CM ΙΛ 1/4 Fig. 1 510 Ο ο ο CM m 3/4 σ r ·) m Ο PI 220 P2 '330 Fig * 4 ο tN