CN101563186B - Spindle device and composite machine tool with it - Google Patents

Abstract

The present invention relates to a spindle device and a machining center in which spindle replacement can be carried out in an extremely short time, the downtime during maintenance is short, and the production efficiency is high. In the main shaft device (20), wiring (41, 42) extending from the main shaft (30) and wired to the support arm via the bracket (21), and a coupling part ( 74), each of which is provided at a position extending a predetermined length from the extending portion of the wiring (41, 42).

Description

Spindle device and machining center including the same

technical field

The present invention relates to a spindle device and a machining center including the same, and more particularly, to a spindle device connected to a spindle head of a portal type machining center and a machining center including the same.

Background technique

For example, a portal type machining center that linearly reciprocates a table to which a workpiece is attached is generally used as a machining center for performing machining such as cutting and/or drilling by three-dimensional relative motion between a large workpiece and a tool, And for controlling the spindle with tools in the X-axis, Y-axis and Z-axis directions.

In a portal machining center, a saddle is connected to a beam through two columns, a spindle head is connected to one end of a ram that moves in the Z-axis direction relative to the slide, and the spindle moves through a bracket. Two support arms pivotally connected to the spindle head.

In this type of spindle, an engine built-in type in which the motor is housed in the spindle is used, and a machine tool is known in which a power supply line for driving the motor and signal lines for sensors and the like are wired from the spindle head side, And a relay connector is provided to establish connection therebetween (for example, see Patent Document 1).

Patent Document 1: Unexamined Japanese Patent Publication No. JP-A-2006-129611 (FIG. 1)

Contents of the invention

The problem to be solved by the present invention

In fact, in the machine tool described in Patent Document 1, the attachment is connected to the indexing shaft of the spindle head, and a relay connector is provided at the connection between the attachment and the indexing shaft. Therefore, for example, when the main shaft is separated from the attachment for maintenance, the attachment and the index rotary shaft have to be disassembled in order to disconnect the power line and the signal line via the relay connector, thus consuming time for performing maintenance. time. During maintenance, the machine tool has to be stopped, thus causing problems of increased downtime and reduced productivity.

Furthermore, when the power line and the signal line are wired together as described in Patent Document 1, the signal line may be affected by noise from the power line.

The present invention has been made in consideration of the above-mentioned problems, and its first object is to provide a spindle device and a machining center in which spindle replacement can be performed in an extremely short time, the downtime during maintenance is short, and the productivity is high. Furthermore, a second object of the present invention is to provide a spindle device and a machining center capable of preventing wiring from being affected by disturbance.

solution to the problem

The first object of the present invention is achieved by the following (1) to (4) aspects.

(1) The spindle device includes:

a bracket pivotally connected to the support arm and having a tubular portion generally perpendicular to the pivot axis of the bracket;

a main shaft which fits into the tubular portion of the bracket in an attachable/detachable manner, and which enables the tool to be mounted on one end side of the main shaft; and

wiring, which extends from the main shaft and is wired via the bracket to the support arm,

A coupling member in which is provided at a position extending a predetermined length from the extending portion of the wiring is accommodated in the bracket.

(2) The spindle device according to (1),

The brackets include:

a stent body having a tubular portion, and a recessed portion receiving the coupling member; and

A cover attached to the stand body to cover the opening of the recessed section.

(3) The spindle device according to (1) and (2),

Wherein the bracket main body is provided with:

an opening penetrating into the groove portion from the rear end face of the bracket main body; and

an angled hole opening from the groove portion to the joint face to which the pivot of the support arm is connected, and

Wherein the wiring is wired to the support arm through the opening, the groove part and the oblique hole of the bracket main body.

(4) A machining center including the spindle device according to any one of (1) to (3).

Furthermore, the second object of the present invention is achieved by the following aspects (5) to (9).

(5) Spindle device, including:

a bracket pivotally connected to the support arm and having a tubular portion generally perpendicular to the pivot axis of the bracket; and

a main shaft, which is attachably/detachably fitted into the tubular portion of the bracket, wherein the cutter is mounted on one end side of the main shaft, and the first and second wires extend from the other end side of the main shaft,

The brackets include:

a space through which the first and second wires are individually wired; and

Two openings are used to respectively guide the first and second wires to the space.

(6) The spindle device according to (5),

Wherein the first wiring is a power supply line for the motor contained in the main shaft, and the second wiring is a signal line for the sensor.

(7) The spindle device according to (5) or (6),

Wherein the space has first and second spaces formed at substantially symmetrical positions with respect to the central axis of the tubular portion.

(8) The spindle device according to any one of (5) to (7),

wherein the bracket has sides forming a pair of joint surfaces to which the pivots of a pair of support arms are connected, and

Wherein the space is open to the pair of bonding surfaces so as to lead out the first and second wirings, respectively.

(9) A machining center including the spindle device according to any one of (5) to (8).

Beneficial effect

According to the present invention, there is provided a wiring extending from the main shaft and wired to the support arm via the bracket, and a coupling member provided at a position extending a predetermined length from the extending portion of the wiring is accommodated in the bracket. Therefore, when detaching the main shaft from the bracket, the wiring can be separated via the coupling member while keeping the bracket connected to the support arm. Furthermore, when the main shaft is connected to the bracket, the wiring can be connected via the coupling member while keeping said bracket connected to the support arm. As a result, the spindle can be replaced in a very short time, resulting in short downtime and high productivity during repairs.

In addition, the coupling member is accommodated in a groove portion of the bracket main body, which is covered by the cover. Therefore, when the main shaft is detached from the support, the coupling part can be easily pulled out from the support together with the main shaft, and the coupling part can be prevented from interfering with other parts in the support.

In addition, the bracket body is provided with an opening penetrating from a rear end surface of the bracket body into a groove portion, and an oblique hole opening from the groove portion toward an engagement surface to which the pivot of the support arm is connected. And wiring is wired to the support arm via the opening hole of the bracket main body, the groove portion and the oblique hole. Therefore, the wiring extending from the main shaft can be smoothly wired to the support arm.

Furthermore, according to the present invention, the bracket to which the main shaft is connected is provided with a space through which the first and second wirings are individually wired and two openings for respectively wiring the first and second wires. The second wiring is led to the space, and therefore, the first and second wiring can be prevented from being affected by noise. In particular, when the first wiring is a power supply line for a motor included in the main shaft and the second wiring is a signal line for a sensor, the signal line can be prevented from being affected by noise caused by the power supply line. Therefore, the operation of the main shaft can be accurately detected by the sensor.

In addition, since the space has the first and second spaces formed at positions substantially symmetrical with respect to the central axis of the tubular portion of the stent, the first and second wirings can be wired separately from each other, and it is possible to more surely prevent Every wiring is affected by noise.

In addition, the space is opened toward a pair of joint surfaces to which the pivots of a pair of support arms are connected for the purpose of drawing out the first and second wirings, respectively, and therefore, the first and second wirings can be Wiring to the pivot without being affected by noise.

Description of drawings

FIG. 1 is a schematic view of a portal type machining center to which a spindle device of the present invention is applied.

FIG. 2 is a perspective view showing a main part of the spindle head shown in FIG. 1 .

Fig. 3 is a front view showing the spindle head.

Fig. 4 is an exploded perspective view showing the spindle device.

Figure 5A is a top view of the stent body.

Figure 5B is a rear view of the stent body.

FIG. 5C is a cross-sectional view taken along line V-V of FIG. 5B.

Explanation of reference signs

1 door machining center (machining center)

20 spindle device

21 brackets

22 tubular sections

23 bracket body

24 flat cover

25 back cover

30 spindle

41 Power cord (first wiring)

42 signal lines (second wiring)

70, 71' grooved section

71, 71' opening

72, 72' inclined hole

S ₁ first space

S ₂ Second Space

Detailed ways

Hereinafter, a spindle device according to the present invention and a portal type machining center as a machining center according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1 , in a portal type machining center 1 , a table 3 is supported on a bed 2 so as to move in an X-axis direction, and a pair of columns 4 are vertically provided on opposite sides of the bed 2 . A beam 5 runs across the upper end of the column 4, and a slide 6 is provided at the beam 5 so as to be movable in the Y-axis direction. In addition, a ram 7 that can be raised and lowered in the Z-axis direction is supported by the slider 6, and serves to hold the spindle device 20 of the present invention while enabling index rotation around the Y-axis and the Z-axis. The spindle head 8 for driving the spindle device 20 is fitted to the lower end of the ram 7 in a manner.

As shown in FIGS. 2 and 3 , the spindle head 8 has a pair of support arms 9 so that a bracket 21 of the spindle device 20 is sandwiched between them, and a pair of pivot shafts 10 fixed at the sides of the bracket 21 via a plurality of bearings 11 It is accommodated rotatably in the support arm 9 . Furthermore, a motor 12 is provided on one of the pivots 10; therefore, a main shaft device 20 is connected to a pair of support arms 9 so as to be pivotable about a Y axis (pivot A). It should be noted that the pivotal drive of the spindle arrangement 20 may be provided by the gear drive of the pivot shaft 10 rather than by the motor 12 arranged around the pivot shaft 10 .

As shown in Figure 4, the bracket 21 of the spindle device 20 includes:

A bracket body 23 to which the pivot shaft 10 is fixed at its side in the Y-axis direction and which has a tubular portion passing through the bracket body 23 in the X-axis direction (approximately perpendicular to the pivot axis A) twenty two;

A pair of flat plate covers 24, which are fixed at the sides of the bracket main body 23 in the Z-axis direction; and

The rear cover 25 is fixed on the rear end surface of the bracket main body 23 .

Further, a main shaft 30 having a tool W mounted on its tip side (one end side) is attachable/detachable into the tubular portion 22 of the holder main body 23 . It should be noted that, in FIG. 4 , reference numeral 23 a denotes a bolt hole for fixing the pivot shaft 10 .

Further, in the main shaft 30 , a rotating portion 31 equipped with a tool W is supported so as to be rotatable with respect to a housing 32 via an unillustrated bearing. The rotating part 31 is driven by an internal motor not shown. It should be noted that, as the main shaft 30 , a known built-in-engine main shaft can be applied. The main shaft 30 is fixed to the bracket 21 by fastening a bolt between a flange portion 32 a provided at the housing 32 and the front end face of the bracket main body 23 . Therefore, the spindle 30 can be pulled out from the bracket 21 toward the tip side by removing the plurality of bolts 33 .

As the other end side of the main shaft 30, the rear end of the housing 32 is formed to have a small diameter. Therefore, the power supply line 41 (first wiring) serving as wiring through which power is supplied to the stator of the engine, and the signal line 42 (second wiring) serving as wiring for sensors provided at the main shaft 30 to the Extends rearward so as not to interfere with the tubular portion 22 of the stent body 23 . It should be noted that, in the present invention, as sensors, an encoder for detecting the rotational speed of the rotating portion 31, a position detection sensor for detecting the position of the clamping piston, and/or a sensor for detecting the presence or absence of a tool is provided. The presence of a tool detection sensor.

The power cord 41 drawn out from the housing 32 to the rear cover 25 is wired through the first space _S1 formed in the bracket main body 23 . On the other hand, each signal line 42 inside the rear cover ₂₅ is wired through the second space _S2 formed between the first space and the central axis B of the tubular portion 22 with respect to the bracket main body 23. S ₁ approximately symmetrical position.

The first space _S1 and the second space _S2 are formed in substantially the same shape. As shown in Figures 4 and 5, the bracket body 23 is provided with:

Groove portions 70, 70' formed at the sides of the bracket body 23 perpendicular to the pivot axis A of the bracket body 23 and the central axis B of the tubular portion 22 (in the Z-axis direction);

Holes 71, 71' that penetrate the recessed portions 70, 70' from the rear end surface of the bracket main body 23; and

Slanted holes 72, 72' are opened from the bottom surface of the recessed portion 70, 70' toward each joint surface to which the pivot shaft 10 is connected, and said slanted holes 72, 72' partly face toward the inner periphery of the tubular portion 22 open face.

Also, a ring groove 73 to which an unillustrated O-ring fits is formed around the groove portions 70, 70', and a pair of flat plate covers 24 are fixed to the holder main body 23, respectively, thereby sealing the groove portions 70, 70'. Side opening.

Also, the power supply line 41 and the signal line 42 that are wired through the first space S1 and the second space S2 formed as described above and drawn out from the joint surfaces are drawn from each of the pair of pivot shafts 10 formed at each of the joint surfaces. The cylinders are removed and guided respectively towards the spindle head (see Figure 3). In addition, as shown in FIG. 4, the power supply line 41 and the signal line 42 are detachably/connectable along the connecting parts 74 such as solderless terminals and/or connectors including a pair of connecting parts for connecting the terminals, respectively. program connection. The coupling members 74 are respectively provided at positions extending a predetermined length from the extension portions for the wires 41, 42 extending from the outer surface of the housing 32, and the coupling members 74 are accommodated in the groove portions 70, 70' middle. Here, the "predetermined length" in this embodiment means at least the length required to set the wiring from the extended portion for the wiring 41, 42 to the coupling member 74 provided at the wiring 41, 42 at the spindle head side. In addition, the openings 71, 71' of the bracket main body 23 are formed to have a size through which the wires 41, 42 and the coupling member 74 can sufficiently pass. It should be noted that the coupling part 74 in FIG. 4 shows that: the male connector 74a is provided at the wiring extending from the main shaft 30; and the female connector 74b is provided at the wiring at the head side of the main shaft.

Therefore, when the main shaft 30 is detached from the bracket 21, the plate cover 24 is removed to release the coupling member 74 accommodated in the groove portions 70, 70', thereby separating the wires 41, 42. Then, since the main shaft 30 is pulled out from the bracket 21, the separated wires 41, 42 and the coupling member 74 at the side of the main shaft pass through the openings 71, 71', and are taken out from the bracket 21. Therefore, these wires 41 , 42 are separated by releasing the coupling member 74 , and the separation of these wires 41 , 42 is ensured while keeping the bracket main body 23 connected to the support arm 9 .

Moreover, when the main shaft 30 is connected to the bracket 21, the wiring 41, 42 exposed from the rear end surface of the bracket main body 23 is wired to the recess via the holes 71, 71' when the flat cover 24 and the rear cover 25 are removed. groove portions 70 , 70 ′, and is connected to the wires 41 , 42 wired into the groove portions 70 , 70 ′ from the spindle head side via coupling members 74 . Therefore, the connection of these wires 41 , 42 is ensured while maintaining the connection of the bracket main body 23 to the support arm 9 .

It should be noted that, as shown in FIG. 5B, in the case where the main shaft 30 is connected to the bracket 21, the phase from which the power line 41 is taken out and the phase of the opening 71 of the first space _S1 are located close to each other. In addition, the signal line 42 and the phase of the opening 71' of the second space _S2 are also as close as possible to each other. Therefore, these wirings 41, 42 are prevented from causing interference inside the rear cover 25, and wiring arrangement can be more facilitated.

Therefore, in the main shaft device 20 of the present embodiment, the wirings 41, 42 extending from the main shaft 30 and wired to the support arm 9 via the bracket 21 are provided, and are respectively provided at predetermined positions extending from the extension parts for the wirings 41, 42. The coupling member 74 at the position of the length is accommodated in the bracket 21 . Therefore, when detaching the main shaft 3 from the bracket 21, it is possible to separate the wires 41, 42 via the coupling member 74 while keeping the bracket main body 23 connected to the support arm 9. Besides, when the main shaft 30 is connected to the bracket 21, it is also possible to connect the wires 41, 42 via the link member 74 while keeping the bracket main body 23 connected to the support arm 9, thus enabling The main shaft 30 is replaced without detaching the bracket main body 23 from the support arm 9 .

In addition, coupling members 74 are accommodated in groove portions 70, 70' of the bracket main body 23 covered by the flat cover 24. As shown in FIG. Therefore, when the main shaft 30 is detached from the support 21, the coupling part 74 can be easily pulled out of the support 21 together with the main shaft 30, and further, the coupling part 74 can be prevented from interfering with other parts in the support 21.

In addition, the bracket body 23 is provided with: openings 71, 71' penetrating into the groove parts 70, 70' from the rear end surface of the bracket body 23; 72', to which the pivot 10 of the support arm 9 is connected. And the wires 41, 42 are wired to the support arm via the openings 71, 71' of the bracket main body 23, the groove portions 70, 70' and the oblique holes 72, 72'. Therefore, the wires 41, 42 extending from the main shaft 30 can be smoothly wired to the support arm. Furthermore, since the rear end surface of the bracket main body 23 is covered by the rear cover 25, these wirings 41, 42 can be wired without being exposed to the outside.

In addition, in the spindle device 20 of this embodiment, the bracket 21 connected to the spindle 30 is provided with: a first space S ₁ and a second space S ₂ , and the power line 41 and the signal line 42 pass through the first and second spaces. The two spaces are wired separately; and two openings 71, 71' are used to respectively lead the power line 41 and the signal line 42 to the groove parts of the first space _S1 and the second space _S2 70, 70' in. Therefore, the signal line 42 can be prevented from being affected by noise caused by the power supply line 41, and the operation of the spindle 30 can be accurately detected by the sensor.

In addition, since the first space _S1 and the second space _S2 are formed at substantially symmetrical positions with respect to the central axis B of the tubular portion 22 of the holder main body 23, the power line 41 and the signal line 42 can be wired separately from each other. , and the signal line 42 can be more surely prevented from being affected by noise caused by the power supply line 41 .

In addition, for the purpose of drawing out the power line 41 and the signal line 42 respectively, the first space _S1 opens toward one of the joint surfaces of the support body 23 connected to the pivot 10 of one of the support arms 9, and the second space _S2 The other joint surface of the support body 23 to which the pivot 10 of the other support arm 9 is connected is open. Therefore, the signal line 42 can be wired to the pivot without being affected by noise caused by the power supply line 41 .

It should be noted that the present invention is not limited to the foregoing embodiments, and variations, modifications, etc., may be made to the present invention as deemed appropriate.

In this embodiment, the coupling part 74 is accommodated in the groove parts 70, 70', and after the plate cover 24 is removed and the coupling part 74 is released, the main shaft 30 is disengaged from the bracket 21. However, the coupling member 74 may be accommodated at a position (for example, in the rear cover 25 ) by which the main shaft 30 is pulled out from the bracket 21 , by which the coupling member 74 is pulled out from the tubular portion 22 .

Furthermore, in the present embodiment, the spindle device 20 is pivotally supported by the pair of support arms 9 of the spindle head 8 . However, the spindle arrangement 20 may alternatively be supported in a cantilevered manner by a single support arm.

In addition, the shapes of the first space _S1 and the second space _S2 formed in the bracket main body 23 may be changed to any shape as long as the object of the present invention can be achieved. For example, the first space _S1 and the second space _S2 may be single-pass spaces, and in this case, only two openings 71 for respectively introducing the power line 41 and the signal line 42 into the space need to be formed. , 71'. In addition, if the first space S ₁ and the second space S ₂ divided into two parts are provided, as in this embodiment, the first space S ₁ and the second space S ₂ can be located relative to the tubular The central axis B of the portion 22 is substantially symmetrical, but it is not necessary to place these spaces _S1 and _S2 at symmetrical positions.

It should be noted that this application is based on Japanese Patent Application No. 2006-351015 filed on December 27, 2006, and Japanese Patent Application No. 2006-351016 filed on December 27, 2006, the entire contents of which are incorporated herein as for reference.

Claims (3)

1. main shaft device comprises:

Support, this support is pivotally connected on the support arm, and this support comprises:

Rack body with groove part, this rack body also have roughly vertical with the pivotal line of this support tubular portion; With

Be connected to the lid of described rack body, so that the opening of the described groove part of capping;

Main shaft, this main shaft with can connect/dismountable mode is coupled in the described tubular portion of described support, and its make cutter can be installed in this main shaft one distolateral on; And

Wiring, it is wired to described support arm from described main shaft extension and via described support,

Wherein be arranged on be contained in described groove part from the coupling components of the position of the extension definite length extended of described wiring among.

2. main shaft device according to claim 1,

Wherein said rack body has:

Penetrate perforate the described groove part from the rear end face of described rack body; And

From the inclined hole of described groove part to the composition surface opening, described support arm be pivotally connected to this composition surface, and

Wherein said wiring is wired to described support arm via the described perforate of described rack body, described groove part and described inclined hole.

3. machining center, it comprises main shaft device according to claim 1 and 2.

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