JPS60118457A - Gang head exchange type machine tool - Google Patents

Abstract

PURPOSE:To enable to prevent rail-displacement due to relative advance of an unit to that of a rail by connecting a pressure fluid source to a cylinder and contracting a releasing arm when access of a processing unit to a movable rail is detected and releasing it for non-detection period. CONSTITUTION:When processing unit moves forward, a detector 19 once becomes inoperative in an intermediate position to discharge pressure fluid, and then operates at the advanced position to introduce pressure fluid. A movable rail 6 is again pressed by spring 12 and pressure fluid and retrained unmovable at the position together with the gang head 9, the head 9 moves forward in coupled condition by the subsequent advance of the processing unit and performs specified operations. Next, when the processing unit retracts together with the head 9, the detector 19 once becomes inoperative by the subsequent retraction of the processing unit, so that pressure fluid in a cylinder 13 is discharged, an expanding/contracting arm 15 can expand easily because only its spring 12, acts on the contraction side. Thus, the expanding/contracting arm connecting the unit to the movable rail can favorably tie together these components.

Description

[Detailed description of the invention] The present invention relates to a machine tool with an exchangeable gearing head.

Conventionally, as this type of machine tool, for example, Japanese Patent Application Laid-Open No. 55-115
As seen in Publication No. 992, a processing unit having a drive motor is provided on the base via a slide table that is driven in the front and back direction, and a movable rail at the front and a fixed rail at the rear are attached to the outer periphery of the processing unit. Furthermore, a plurality of gearing heads are disposed on the outer periphery of the rail and supported by the annular rail.
The one piece on the movable rail can be freely selected on the movable rail, so that when the processing unit moves forward from the backward end position, the one piece on the movable rail moves forward together with the movable rail as the processing unit moves forward from the backward end position. A system is known in which a predetermined process is performed on a workpiece, but in this case, when the movable rail moves slightly forward from the backward end position of the processing unit, the movable rail moves along with the one piece on the rail. It is necessary to stop and interconnect the unit with the one.

In order to satisfy the conventional requirements, there is a type in which the movable rail and the processing unit are connected to each other via a telescoping arm consisting of a cylinder and a piston rod that are repelled by a spring toward the contraction side. It has been proposed that upon relative advancement between the unit and the movable rail, the spring will have its elasticity reduced and the movable rail will move more or less forward. It comes with the inconvenience of winning.

In order to eliminate this inconvenience, it is conceivable to make the spring a relatively strong spring, but in this case, the spring will not be strong enough when the unit moves to the rearward end position behind the movable rail. , which is undesirable as it results in a relatively large load.

The object of the present invention is to provide a machine tool free of such inconveniences, and a machining unit having a drive motor is provided on a base via a slide table that is driven forward and backward. An annular rail consisting of a movable rail at the front and a fixed rail at the rear is provided on the outer periphery, and a plurality of gearing heads are disposed on the outer periphery of the rail to be supported, and these are connected to the rail by an index table above the annular rail. The movable rail and the machining unit are rotated along the movable rail so that any one can be selected on the movable rail, and the movable rail and the processing unit are reciprocated by a spring. In the type in which the cylinders are connected to each other via arms, a supply source for introducing pressure fluid is provided in the cylinder, and the processing units have a backward end position and a forward position close to the movable rail. A detector is provided, and when the detector is activated, the pressure fluid is guided into the cylinder and acts to retract the arm.

An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawing, (1) indicates a base, on which a processing unit has a drive motor (4) via a hydraulic cylinder (2) and a slide table (3) that is driven in the front and back direction by a hydraulic cylinder (2) and others. (5) and an annular rail (8) consisting of a movable rail (6) at the front and a fixed rail (7) at the rear.
A plurality of gearing heads (9) are disposed in a supporting manner on this, and these are rotated along the rail (8) by the index table on the upper side of the gearing head. ), so that when the machining unit (5) moves forward from its rearward end position, it advances together with the movable rail (6) and performs the treatment in front of it. A predetermined processing is applied to the workpiece on condition Qll.

In this case, this one is generally connected to the unit (5) via a clamp mechanism.

The processing unit (5) has a processing unit case (5) on the outer periphery.
In a), the annular rails (8) are fixed on the table (3), and the annular rails (8) are arranged in pairs above and below, and one pair of the movable rails (6) is connected via a continuous bracket (6a). In addition to being connected to each other, one pair of the fixed rails (7) were connected to each other via the machine frame (7a) and fixed to the core base (11 side) in the machine frame (7a). .

The movable rail (6) and the processing unit (5) are connected to each other via a telescoping arm consisting of a cylinder and a piston rod α4, which are repelled by a spring α2 toward the contraction side. Thus, the movable rail (6) is connected to the processing unit (5).
) and are slidably engaged with each other, and are elastically repelled by the spring a3 toward the unit (5), that is, toward the rear. In the illustrated example, the telescopic arms a$ are arranged in parallel on one pair of left and right upper sides and one pair of left and right lower sides, and each arm 〇 [exist] is attached to the cylinder a3 as shown in Fig. 4. is fixed to the processing unit (5) side and the piston rod (141 is fixed to the movable rail (6) side, and the spring a
3 is a front spacer αe and a spring seat α in the cylinder direction.
The piston rod α is provided through the piston rod α and acts to press the piston rod α rearward.

(-0 wa, D Ekawa body guide 3 doors poap etc. etc.

It is equipped with a supply source Oal and a detector a that detects the backward end position of the processing unit (5) and the forward position close to the movable rail (6), and according to the operation of the detector Ql, The pressure fluid was introduced into the cylinder (131) so that the arm 051 acted on the contracting side in cooperation with the spring α.

To explain this in detail, the cylinder (inside 131 is, for example, the seventh
As clearly shown in the figure, the detector QIU is switchably connected to the supply source 08 and the atmosphere open side ring via a switching valve, and the detector QIU is composed of, for example, a micro valve that controls switching of the switching valve. , which is configured to cooperate with a dog (2) that moves back and forth along with the processing unit (5). That is, the detector (1!J is, for example, a machine frame (7a) as shown in FIG.
side and the dog @ is on the lower side thereof, and in the above-mentioned backward end position and forward position of the processing unit (5), as shown in FIGS. (2
According to the associated operation of the switching valve (201), the supply source (1) is released in the cylinder J.
81 to guide the pressure fluid, but in the intermediate position, the detector αI is pressed by the dog (2) and becomes inoperable, and according to the accompanying operation of the switching valve (to), the detector The inside of the cylinder α was communicated with the atmosphere open side Cυ so that the pressure fluid could be discharged.

To explain further, the switching valve exists on the processing unit (5) as clearly shown in FIGS. 4 to 6, and has an inlet (20a) connected to the supply source side and a manifold (231). an outlet (20b) leading into each cylinder Q3) through the
It is provided with an exhaust port (20c) connected to the atmosphere open side, and an air pipe or other communication pipe (20d) between it and the microvalve Cl91 that controls the exhaust port (20c).

To explain its operation, the processing unit (5) is normally located at the rearward end position slightly separated from the movable rail (6), as shown in FIGS. 1, 4, and 5, for example. At this position, the detector Ql is activated and the pressure fluid is introduced into the cylinder (1, 31), and thus the telescoping arm α9 is only acted on the contraction side by the spring α. In other words, the movable rail (6) is also acted on by the pressure fluid to the contraction side.
2) and the pressure fluid push the fixed rail (
7) Tied to the side. Therefore, in this state, when any one of the gearing heads (9) rotates and is guided onto the rail (6), the gearing head (9) is more or less heavy and its centrifugal force is applied to the rail (6). ), the rail (6) will not move forward inadvertently. Next, considering the case where the processing unit (5) moves forward, the detector a9 becomes inactive once at the intermediate position and the pressure fluid is once discharged, and then moves to the forward position as shown in FIG. 6, for example. The movable rail (6) is again pressed by the spring and the pressure fluid, and the gearing head (6) selected on the rail (6) is actuated again to introduce the pressure fluid. 9), and in this state, the processing unit (5) becomes interconnected with the gigang head (9), and as the processing unit (5) continues to move forward, the gigang head (9) move forward together in their connected state, allowing them to obtain a predetermined action. At this time, if necessary, a mechanical clamp mechanism C2(1) as shown by the chain line in FIG. 4 is provided and operated at the same time.

Next, if we consider the case where the unit (5) retires together with the head (9), the state shown in Figure 6 will be obtained again.
When the machining unit (5) continues to retreat, the detector←l becomes inactive and the pressure fluid is discharged from the cylinder (131), so that the telescoping arm (151 is blown away). Only the arm (15) acts on the contraction side, and can be extended relatively easily.That is, when the unit 5) is subsequently moved backward, the telescopic arm (15) will not be subjected to a large load. Next, the unit (5) returns to the above-mentioned backward movement end position, and the arm Q5) is again guided by the pressure fluid, ready for the next operation.

In this way, according to the present invention, the telescopic arm that interconnects the movable rail and the processing unit is always acted on only by the spring in the contracting side, but at the backward end position and the forward position of the core processing unit. Furthermore, a pressure fluid is applied to the contraction side, and the movable rail can be fixed in a fixed position on the rail by cooperation of the spring and the pressure fluid. While the machining unit returns from the forward movement position to the backward movement end position, the pressure fluid temporarily becomes inactive, and when the unit moves backward, the pressure fluid does not become a load, and the pressure fluid can be easily retreated. It has the effect of being able to get more work.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an example of the machine tool of the present invention, Fig. 2 is a perspective view of its machining unit in an advanced state, Fig. 3 is a partially cut away perspective view, and Fig. 4 is its main part. Fig. 5 is an enlarged partially cutaway plan view, Fig. 5 is a sectional view taken along the ■-v line, Fig. 6 is a cross-sectional view of the machining unit slightly advanced, and Fig. 7 is a fluid pressure circuit diagram. It is. +11...Base (3)...Feeding table (4)
... Drive motor (5) ... Processing unit (6)
...Movable rail (7)...Fixed rail (8)...
Annular rail (9)... Guyang head (11...
Index table (121... spring α...
・Cylinder o4)...Piston rod a death...Extendable arm o8I...Supply Genkan...Kenkawa 2 masters - Continuation 11i-iT=Book 1. Indication of matter 1 In 1981, fj'l Application No. 223131 2, Name of the invention: Exchangeable head 1 machine tool 3, Amendment to the old case Related to patent applicant: 532 Honda Motor Co., Ltd. 4. Substitute person 5. Date of amendment order (voluntary) 6. Number of inventions increased by amendment... 17. Subject of amendment 1. Full text of specification 2. Attached drawings 8. Contents of amendment 1 , the entire specification is amended as shown in the attached sheet. 2. Amend the attached drawing, Figure 7, as shown in the attached sheet, and add attached sheet No. 8.
Add Figure and Figure 9. Also, the symbols in Figure 4 of the attached drawings have been corrected as indicated in red on the attached sheet. Description 1, Name of the invention: Exchangeable gearing head 1 Machine tool 2, Claim 1: A processing unit having a drive motor is provided on a base via a slide table that is driven and fed in the front and back direction, An annular rail consisting of a movable rail at the front and a fixed rail at the rear is provided on the outer periphery of the rail, and a plurality of gearing heads are also provided on the outer periphery of the rail to be supported, and these are indexed on the -F side. J on the table:
In the type that rotates along the rail so that any one piece can be selected on the movable rail, and further connects the movable rail and the processing unit, the pressure fluid a gearing head comprising a supply source, connected to the cylinder of the arm via a passage, and guided into the cylinder to press the pressure to the side; 1 interchangeable machine. - 1 - 3. Detailed Description of the Invention The present invention relates to a machine tool with an exchangeable gigang head. Conventionally, as this type of machine tool, for example, Japanese Patent Application Laid-Open No. 53-115
As seen in Publication No. 992, a processing unit having a drive motor is provided on a base via a slide table that is driven in the front and back direction, and a movable rail at the front and a fixed rail at the rear are installed on the outer periphery of the unit. Furthermore, a plurality of gearing heads are disposed on the outer periphery of the rail and supported by the annular rail, and these are rotated along the rail by an index table above the rail to select any one. [Thus, when the one piece on the movable rail moves forward from the rearward end position of the machining eco-knit, it moves forward together with the movable rail and picks up the workpiece in front of it. A type in which a predetermined process is applied to the movable rail is known, but in this case, the movable rail is moved slightly forward from the backward end position to the rear end position. It is necessary to be able to stop with the one and interconnect the unit with the one. In order to meet the requirements of the conventional art, the movable rail and the additional T unit are connected to a cylinder and a piston that extends from a piston that fits into the cylinder and is elastically repelled by a spring toward the contraction side. A system has been proposed in which the units are connected to each other via telescopic arms, but in that case, the springs lose their elasticity due to the relative advancement between the unit and the movable rail. This causes the disadvantage that the movable rail moves forward more or less. The purpose of the present invention is to obtain a machine tool that does not have such inconveniences, and a processing unit 1~ having a drive motor is installed on a base via a slide table that is fed and driven in the front and back direction. At the same time, an annular rail consisting of a movable rail at the front and a fixed rail at the rear is provided on the outer periphery of the rail, and a plurality of gearing heads are disposed on the outer periphery of the rail and supported by the rail, and these are connected to an index table above the annular rail. Any one of the movable rails can be selected as the movable rail by rotating along the rail, and the movable rail is made up of a processing unit consisting of a cylinder and a piston rod extending from a piston fitted to the cylinder. In this type, a pressure fluid supply source is provided, and this is connected to the cylinder via a communication path to connect the arm to the cylinder. The pressure fluid introduced into the chamber presses the tube toward the contraction side. The pressurized fluid in the cylinder is likely to be subjected to some degree of load when the machining unit is moved to the reverse end position. The second invention eliminates the inconvenience of
- a detector for detecting the backward end position of the processing unit and the forward position close to the movable rail;
The arm can be freely switched between a state in which the pressure fluid is introduced into the cylinder when the detector is in operation, and a state in which the pressure fluid in the cylinder is discharged when the detector is inactive. An example of implementing the present invention will be explained with reference to the attached drawings. In the drawing, (1) indicates a base, and the base (1) is connected to a hydraulic cylinder (2) and a drive motor (4) via a slide table (3) that is driven in the front and back direction by other means. A unit (5) is provided, and an annular rail (8) consisting of a front movable rail (6) and a rear fixed rail (7) is provided on the outer periphery of the unit (5), and further, on the outer periphery of the rail (8),
A plurality of gearing heads (9) are disposed supported by this, and these are rotated along the rail (8) by the index table GO on the upper side thereof, and any one is attached to the movable rail (6). Then, when the processing unit (5) moves forward from its rearward end position, the movable rail (6) moves forward together with the processing unit (5), and moves forward with the movable rail (6). The jig table (11) allows the specified machining to be performed on the workpiece of t. The processing unit (5) has a processing unit case (5) on the outer periphery.
In a), the annular rails (8) are fixed on the table (3), and the annular rails (8) are arranged in pairs above and below, and one pair of the movable rails (6) The fixed rails (7>) are connected to each other, and the pair of fixed rails (7>) are connected to each other via the machine frame (7a) and fixed to the base (1) side in the machine frame (7a). The movable rail (6) and the machining knit (5) refer to the fourth
As clearly shown in the figure, it consists of a cylinder 0e and a piston rod 0@ extending from a piston (14a) that fits into the cylinder 0e.
9, and the movable rail (6) is engaged with the processing unit L-(5) so as to be able to move around each other, and the spring Q'Z) engages the movable rail (6) with the processing unit (5). ) side, that is, backwards. In the illustrated example, the telescopic arm is 0! il are arranged in parallel on one pair of left and right on the upper side and one pair on left and right on the lower side, and each arm (for I9, as shown in Fig. 4, the east of cylinder 1 is connected to the side of added eco-knit (5) ,
The piston rod aΦ is fixed to the movable rail (6) side, and the spring 0b is provided in the cylinder body e via the front space (le) and the spring seat (17+) and the piston rod The above is not particularly different from the conventional one, but according to the present invention, for example, as shown in FIG. aa and a communication path (1
It communicates with the cylinder (131) through the cylinder (131) so that the arm a9 is always pressed in the direction of contraction by the pressure fluid introduced into the cylinder (13). The pressure fluid is converted into pressure air, and the passageway (18a) for guiding the air is provided with a regulator,
The pressure fluid was always kept at a constant pressure. Thus, the processing unit (5) moves from the backward end position shown in the fourth figure to the movable rail (6) as shown in the sixth figure, for example.
If we move to a slightly forward position close to
The arm a9 can be obtained from the state shown in FIG. 8 to the state shown in FIG. 9, for example. That is, the cylinder (13) moves forward on the piston rod (+41) accompanied by the conit (5), and as a result, the spring (+21) stretches a little and its elasticity is reduced; As the internal volume of the cylinder is increased, a corresponding amount of the pressure fluid is introduced from the supply source C frame, and the cylinder (1:+) is always filled with the pressure fluid. In other words, the movable rail (6) is always subjected to the pressing force of the pressure fluid, and the arm (I9) is in a state of being pushed toward the contraction side by the pressure fluid. It is preferable that the pressurized fluid is discharged from the cylinder 3 as necessary so as not to cause an unnecessary load.That is, for example, when the pressure fluid is discharged from the cylinder 3 as necessary, there is no unnecessary load. When the unit (5) is moved to the reverse end position, the internal volume of the cylinder (13) is reduced by -8- as shown in Figure 8, and a corresponding amount of the pressure fluid is passed through the regulator 121tl. This resistance at the time of ejection tends to become a load to some extent, and it is preferable to eliminate this.The second invention meets the above requirements, and the processing unit (5) A detector (I9) is provided to detect the backward end position and the forward position close to the movable rail (6).
19 to the detector (1! When 11 is activated, connect the cylinder (1
The pressure fluid in the cylinder (13) is switched between a state in which the pressure fluid is introduced into the cylinder (13) and a state in which the pressure fluid in the cylinder (13) is discharged to the outside when the cylinder is not in operation. As clearly shown in Fig. 7, a switching valve (2) is interposed in the communication passage (18a) to connect the inside of the cylinder 0 to the supply source (2) and the atmosphere open side (5), and to connect the inside of the cylinder 0 to the supply source (2) and the atmosphere open side (2). A9 consists of, for example, a micro-valve that switches and controls the switching valve (2), and is configured to cooperate with the dog that moves back and forth along with the processing unit (5). 19 is the machine frame (for example, as shown in Figure 5).
7a) The side of the dock is located on the lower side of the dock, and the detector 09) is located at the backward end position and the forward position of the processing unit (5) as shown in FIGS. 5 and 6, for example. is released from the pressure of the dock and operates, and the switching valve [phase]
According to the accompanying operation of the supply source a in the cylinder 0
e is connected to guide the pressure fluid, but at the intermediate position, the detector a9 is pushed by the dock (-C) and becomes inoperable, and according to the associated operation of the switching valve (2), the cylinder (
The inside of 13 was communicated with the atmosphere open side (2) so that the pressure fluid could be discharged. To explain further, the switching valve (2) exists on the additional eco-unit (5) as shown in FIGS. 4 to 6, and connects the inlet (20a) connected to the supply source (1 & an outlet (20b) connected to each cylinder 3 through the
It is provided with an exhaust port (20c) connected to the atmosphere open side, and an air vibrator or other communication pipe (20d) between the micro valve a9 and the micro valve a9 for controlling this. As mentioned above, the communication path (
18a) is equipped with a regicolator Q4) to keep the fluid at a constant pressure, and in substantially the same way, a pressure fluid,
For example, a relief valve is provided in the circuit leading pressure oil to the above-mentioned working cylinder (2) to maintain the fluid at a constant pressure. To explain its operation, the processing 1 (5) is always t, 1, for example, as shown in FIGS. Since B is in the backward movement end position, the detector (+9+) is activated and the pressure fluid is introduced into the cylinder (131, for example, as shown in FIG. 8), and thus the telescoping arm Not only is the pressure exerted on the contraction side by the spring 0z, but also the pressure
] The fluid also acts on the contraction side. In other words, the movable rail (6) is strongly pushed backward by the spring (121) and the pressure fluid, and is tied to the fixed rail (7). Therefore, in this state, when any one of the gearing heads (9) rotates and is guided onto the rail (6), the gearing head (9) is somewhat heavy and its centrifugal force is applied to the rail. (6), the rail (6) will not move forward inadvertently.
) moves forward, the detector Ogl becomes inactive at its intermediate position and the pressure fluid is once discharged, and then reaches the forward position as shown in Figure 6, for example, and is activated again. The introduction of a pressure fluid takes place, so that the movable rail (6) is again pressed by the spring (12+) and the pressure fluid and the gearing head (9) selected on the rail (6), as shown in FIG. 9, for example. ) and is immovably restrained in that position,
In this state, the added eco-knit (5) is attached to the gigang head (
9), and the processing unit (5) is connected to the processing unit (5).
), the gearing head (9), in its connected state, moves forward together to obtain a predetermined operation. At this time, if necessary, a mechanical clamp mechanism (2) as shown by the chain line in FIG. 4 is provided and operated at the same time. Next, if we consider the case where the unit (5) retires together with the head (9), the state shown in Figure 6 will be obtained again.
According to the subsequent retreat of the processing unit (5), the detector (+411) becomes inactive once and the pressure fluid is discharged from the cylinder 43, and thus the telescoping arm a9 is released from the spring. Only the QZI is in a state where it is acting on the contraction side, and it can be extended relatively easily.That is, when the connit (5) is subsequently moved back, the telescopic arm a9 will not be subjected to a large load.Next and the unit (
5) returns to the above-mentioned backward movement end position, and the arm a9 is again guided by the pressure fluid, for example, as shown in FIG. 8, and is ready for the next operation. In this way, according to the present invention, the telescoping arm that interconnects the movable rail and the processing unit is one in which pressure fluid is introduced into the cylinder and is acted on the contraction side by the pressure fluid and the spring. This eliminates the above-mentioned disadvantages of the type using only springs, and has the effect of obtaining good adhesion between the movable rail and the processing unit. Furthermore, according to the second invention, when the processing unit is moved to the backward end position, the pressure fluid is discharged from the cylinder to the outside, and the pressure fluid -13- does not become a load and can be moved easily. It has the effect of allowing you to retire from work. 4. Brief description of the drawings FIG. 1 is a perspective view of an example of the machine tool of the present invention, FIG. 2 is a perspective view of the processing unit in the forward state, and FIG. 3 is a partially cut away perspective view. Fig. 4 is an enlarged partially cutaway plan view of the main part, Fig. 5 is a v-vm cross-sectional view, Fig. 6 is a cross-sectional view of the processing unit in a state where the processing unit is moved forward, and Fig. 7 is a circuit diagram of its pressure fluid, and FIGS. 8 and 9 are diagrams explaining its operation. (1) Base (3) Feed table (4) Drive motor (5) Processing unit (6) Movable rail (7) Fixed rail (8 )...Annular rail (9)...Guyang head 00...Index table (IZ...Spring a31...Cylinder (+41...Piston rod a9...Extendable arm (le...Supply source (18a)...Communication path (19...Detector 16-

Claims (1)

[Claims] 1. A processing unit having a drive motor is provided on the base via a slide table that is fed and driven in the front-rear direction, and an annular rail consisting of a movable rail in the front and a fixed rail in the rear is provided on the outer periphery of the processing unit. Furthermore, a plurality of gearing heads are disposed on the outer periphery of the rail and supported thereon, and by rotating the gearing heads along the rail using an index table above the gearing heads, any one can be freely selected on the drive rail. Further, in a type in which the movable rail and the processing unit are connected to each other via a telescoping arm consisting of a cylinder and a piston rod that are elastically repelled to the contraction side by a spring, a cylinder is installed in the cylinder. A supply source for introducing pressure fluid with a key is provided, and a detector is provided for detecting the backward end position of the processing unit and the forward position close to the movable rail, and according to the operation of the detector, the pressure fluid is is guided into the cylinder and acts on the side that contracts the arm.