JP6617025B2 - Vertical lathe work transfer device - Google Patents

Description

  The present invention relates to a workpiece transfer device provided for loading and unloading a workpiece into and from a machine body in a vertical lathe.

As disclosed in Patent Document 1, the vertical lathe is configured such that a spindle head that supports a tool spindle on which a tool is to be mounted is downwardly disposed above the machine body so as to be movable in the vertical direction. A work spindle that is rotated and provided with a chuck for gripping the work is disposed at the upper end, and turning is performed by moving the tool at the spindle head up and down while rotating the work by the work spindle.
FIG. 4 is an explanatory view of a conventional vertical lathe. In FIG. 4, reference numeral 1 denotes an airframe having a bed 2 and a column 3. A spindle head 4 is provided at the upper part of the column 3. A work spindle 5 having a chuck 6 at its upper end and a table 7 that moves up and down is provided. A workpiece transfer table 8 having a conveyor 9 at the upper end is provided outside the machine body 1, and a work W lifted by the table 7 after the chuck 6 is released from the column 3 is transferred to the column 3. 9 is provided with a workpiece dispensing device 40 for pushing upward. This workpiece dispensing apparatus 40 is provided with a stopper 43 at the tip of a piston rod 42 of a cylinder 41 arranged in the horizontal direction. Reference numeral 10 denotes a work guide provided between the work transfer table 8 and the table 7.
Therefore, in this vertical lathe, when an unprocessed workpiece W is carried into the machine body 1, the operator places the workpiece W placed on the conveyor 9 of the workpiece carrier 8 as indicated by an arrow. It is manually moved on the table 7 waiting at the same height as the upper surface of the. Then, the table 7 is lowered and the workpiece W is gripped by the chuck 6, and the workpiece spindle 5 is rotated and turned by the tool of the spindle head 4 that moves up and down.
When the processing is completed, the workpiece W released from the chuck 6 is pushed up by the table 7 and then the piston rod 42 of the workpiece dispensing device 40 is extended and the workpiece 43 is moved by the pad 43 as shown by an arrow in FIG. W is pushed out onto the conveyor 9.

JP 2014-223703 A

As described above, when the work is carried into the machine body, since the worker manually performs the work, the burden on the worker increases. Although it is conceivable to newly install an apparatus for carrying in, since the apparatus protrudes from the front of the machine body, there is a possibility that the work space for the operator is narrowed and obstructs the work.
In addition, since the stroke of the piston rod is constant in the conventional workpiece dispensing device, if the workpiece diameter to be machined is different, it is necessary to replace the pad to match the workpiece in order to push it out to a fixed position on the workpiece carrier. As a result, this work also takes time and effort.

  Accordingly, the present invention provides a workpiece transfer device for a vertical lathe that allows workpieces to be carried in and out without burden on the operator and can be carried out to a fixed position corresponding to the change of the workpiece diameter. It is for the purpose.

In order to achieve the above object, an invention according to claim 1 is a workpiece having a spindle head on which a tool is mounted and a chuck disposed at the upper end of the spindle head at the upper end. In a vertical lathe provided with a spindle, a workpiece transfer device for moving the workpiece back and forth in a predetermined horizontal direction in and out of the machine body,
A moving member movable back and forth in the predetermined direction;
A feed mechanism for moving the moving member to a predetermined position in the predetermined direction;
An engaging portion that is provided on the moving member and can project and retract between a downward projecting position that interferes with the workpiece in the predetermined direction and an accommodation position that does not interfere with the workpiece in the predetermined direction;
An operating mechanism for moving the engaging portion in and out, and the moving member is moved in the predetermined direction by the feeding mechanism in a state where the engaging portion at the protruding position is engaged with the workpiece. Thus, the workpiece can be taken in and out.
According to a second aspect of the present invention, in the configuration of the first aspect, the engaging portion is connected to a receiving plate provided at a tip of the moving member so that an intermediate portion is rotatably connected by a horizontal support shaft. The actuating mechanism is a cylinder that connects a piston rod to an upper end of the engaging member and rotates the engaging member by an expansion / contraction operation of the piston rod.
In order to achieve the above object, an invention according to claim 3 is a workpiece comprising: a spindle head on which a tool is mounted and a chuck disposed at the lower end of the spindle head and holding a workpiece at an upper end. In a vertical lathe provided with a spindle, a workpiece transfer device for moving the workpiece back and forth in a predetermined horizontal direction in and out of the machine body,
A moving member movable back and forth engaging portion provided at the distal end in the predetermined direction of said workpiece,
A feed mechanism for moving the moving member to a predetermined position in the predetermined direction;
An elevating mechanism is provided that moves the entire work conveying device up and down between a lower position where the engaging portion interferes with the work in the predetermined direction and an upper position where the engaging portion does not interfere with the work in the predetermined direction. The moving member is moved in the predetermined direction by the feeding mechanism in a state where the engaging portion is engaged with the work at the lower position, so that the work can be taken in and out. To do.

According to the present invention, since the moving member is moved by the feeding mechanism in a state where the engaging portion is engaged with the work, the work can be reciprocated so that the work can be taken in and out without burden on the operator. Unloading is possible. Further, by adopting a feed mechanism, it is possible to carry out to a fixed position if a stroke corresponding to the diameter of the workpiece is set. Therefore, it is possible to handle a wide variety of workpieces.

It is explanatory drawing of the vertical lathe of form 1. FIG. It is explanatory drawing which shows the carrying-in operation | movement of the workpiece | work by the workpiece conveyance apparatus of the form 1. It is explanatory drawing which shows the conveyance operation of the workpiece | work by the workpiece conveyance apparatus of the form 2, (A) shows carrying-in operation, (B) shows carrying-out operation, respectively. It is explanatory drawing of the conventional vertical lathe. It is explanatory drawing which shows the workpiece carrying-out operation | movement by the conventional workpiece | work discharge apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Form 1]
FIG. 1 is an explanatory view showing an example of a vertical lathe, and the basic configuration is the same as that of the conventional one described in FIG. 4. Therefore, the same components are denoted by the same reference numerals, and redundant description is omitted. To do.
The workpiece transfer device 20 employed here is a moving member in which a connecting block 22 is connected to the rear end of a device main body 21 held in the front-rear direction (the right side in FIG. 1 is the front) with respect to the column 3. The connecting block 22 is supported by a guide 24 so as to be movable in the front-rear direction, which is a predetermined direction. Further, in the apparatus main body 21, a feed screw 25 parallel to the moving rod 23 is rotatably provided and is screwed to the connecting block 22.

  A motor 26 is provided below the apparatus main body 21, and a rotation transmission mechanism 27 such as a pulley and a belt, a sprocket and a chain is interposed between the rear end of the feed screw 25 and the output shaft of the motor 26. ing. As a result, when the motor 26 is driven and the output shaft rotates, the feed screw 25 rotates via the rotation transmission mechanism 27, and the connecting rod 22 can be screwed to move the moving rod 23 back and forth. The feed screw 25, the motor 26, and the rotation transmission mechanism 27 are the feed mechanism of the present invention.

  A receiving plate 28 is fixed to the front end of the moving rod 23 protruding from the apparatus main body 21. A cylinder 29 serving as an operating mechanism is disposed on the receiving plate 28 with the piston rod 30 facing forward. In the front of the cylinder 29, the receiving plate 28 is provided with a dog-shaped engaging member 31 whose intermediate portion is rotatably connected by a support shaft 32 in the left-right direction, and the upper end of the engaging member 31 is a piston rod. 30 is connected to the front end.

  Therefore, as the moving rod 23 moves back and forth as the motor 26 is driven, the backing plate 28 protrudes forward from the body 1 as shown by the retracted position located in the body 1 as indicated by the solid line and by the two-dot chain line. It will move back and forth between the forward positions. Further, the engaging member 31 rotates counterclockwise around the support shaft 32 in the contracted state of the piston rod 30 and protrudes forward from the receiving plate 28 and does not protrude downward from the receiving plate 28 as indicated by a two-dot chain line. It becomes. The engaging member 31 is positioned above the upper surface of the work W at the delivery position when the table 7 is lifted at this accommodation position, and therefore does not interfere with the work W even if the moving rod 23 moves back and forth. On the other hand, when the piston rod 30 is in the extended state, the engaging member 31 rotates clockwise about the support shaft 32 and becomes a protruding position that protrudes downward from the receiving plate 28 as indicated by a solid line. Since the engaging member 31 protrudes downward from the upper surface of the workpiece W at the transfer position at this protruding position, it interferes with the workpiece W when the moving rod 23 moves back and forth.

  In the workpiece transfer apparatus 20 configured as described above, when the workpiece W on the workpiece transfer table 8 is carried into the machine body 1, the engagement member 31 is set to the storage position as shown in FIG. Then, with the table 7 raised to the delivery position, the motor 26 is driven to rotate the feed screw 25, and the moving rod 23 is advanced to cause the receiving plate 28 to protrude above the workpiece W. The forward stroke at this time is a length at which the engaging member 31 is positioned above the inner diameter side of the ring-shaped workpiece W placed at a fixed position on the conveyor 9 of the workpiece conveyance table 8. This length can be arbitrarily changed by changing the number of rotations of the feed screw 25 by the motor 26 according to the size of the workpiece W.

Next, the piston rod 30 of the cylinder 29 is extended to rotate the engaging member 31 to the protruding position. Then, as shown in FIG. 2B, the engaging member 31 protruding downward is engaged with the inside of the workpiece W. Here, the motor 26 is driven to rotate the feed screw 25, and the moving rod 23 is retracted to retract the receiving plate 28 into the body 1. Then, the workpiece W with which the engaging member 31 is engaged inside also moves backward on the conveyor 9 together with the engaging member 31 and slides on the work guide 10 and is transferred onto the table 7 as indicated by a two-dot chain line.
Then, the piston rod 30 of the cylinder 29 is contracted to bring the engaging member 31 into the storage position to release the engagement with the workpiece W, and then the moving rod 23 is retracted to retract the receiving plate 28 from the machining area. Next, the table 7 is lowered, the workpiece W is gripped by the chuck 6, the workpiece spindle 5 is rotated, and the spindle head 4 is moved up and down to perform turning.

  When the workpiece W is unloaded from the machine body 1 after the machining is completed, the piston rod 30 of the cylinder 29 is extended in a state where the gripping of the chuck 6 is released and the table 7 is raised to the delivery position and the workpiece W is lifted. Then, the engaging member 31 is rotated to the protruding position. Then, the engaging member 31 protruding downward is positioned behind the workpiece W. Here, when the motor 26 is driven to rotate the feed screw 25 and the moving rod 23 is advanced, the receiving plate 28 is also advanced, the engaging member 31 comes into contact with the workpiece W, and the workpiece W is fed forward as it is. Then, the workpiece is transferred onto the conveyor 9 of the workpiece carrier 8 via the workpiece guide 10. Thereafter, when the moving rod 23 is retracted, the first standby position is restored.

  As described above, according to the workpiece transfer device 20 of the first aspect, the moving rod 23 that can move in the front-rear direction and the screw feed mechanism (feed screw 25, motor 26) that feeds the moving rod 23 in the front-rear direction by driving the motor. , A rotation transmission mechanism 27) and an engaging member which is provided on the moving rod 23 and can be projected and retracted between a downward projecting position where it interferes with the workpiece W in the front-rear direction and an accommodation position where it does not interfere with the workpiece W in the front-rear direction. 31 and a cylinder 29 for moving the engaging member 31 in and out, and the moving rod 23 is screwed forward and backward by the screw feeding mechanism in a state where the engaging member 31 at the protruding position is engaged with the workpiece W. The workpiece W can be taken in and out. Therefore, the work W can be carried in and out without burden on the operator. Further, by adopting a screw feed mechanism driven by a motor, if a stroke corresponding to the diameter of the workpiece W is set, it can be carried out to a fixed position. Therefore, it is possible to handle a wide variety of workpieces.

  In the first aspect, the engaging member is rotated and protruded downward. However, the engaging member may be linearly protruded and protruded downward using a cam mechanism or the like. Further, the cylinder can be arranged downward without using a cam mechanism or the like, and the engaging member attached to the piston rod can be directly projected and retracted.

[Form 2]
In the first aspect, the engaging member protrudes and retracts downward and is engaged with and disengaged from the workpiece. However, the entire workpiece transfer device can be moved up and down to engage and disengage from the workpiece without engaging and disengaging the engaging member. . Hereinafter, the structure will be described. Since the configuration of the vertical lathe is the same as that of the first embodiment, the configuration of the work transfer device will be mainly described.
In the vertical lathe shown in FIG. 3, the apparatus main body 21 of the workpiece transfer apparatus 20 is supported by vertical guides 33, 33 provided on the column 3 so as to be movable in the vertical direction, and includes an actuator such as a cylinder or a ball screw. The elevating mechanism 34 can be moved up and down to an arbitrary position in the vertical direction. Also, a stopper 35 having an engaging portion 36 protruding downward is fixed to the front end of the moving rod 23.

  Therefore, in this work transfer device 20, when the work W on the work transfer table 8 is carried into the machine body 1, as shown by a two-dot chain line in FIG. In the state where it is raised to the position, the motor 26 is driven to rotate the feed screw 25, and the moving rod 23 is moved forward so that the contact metal 35 protrudes above the workpiece W. The forward stroke at this time is a length at which the engaging portion 36 is positioned above the inner diameter side of the workpiece W placed at a fixed position on the conveyor 9.

Next, as shown by the solid line, the entire device is lowered to the lower position by the elevating mechanism 34 and the engaging portion 36 protruding downward is engaged with the inside of the workpiece W, and then the motor 26 is driven to feed the screw. 25 is rotated to move the moving rod 23 backward. Then, the work W with which the engaging portion 36 is engaged inside moves backward on the conveyor 9 together with the engaging portion 36, slides on the work guide 10, and is transferred onto the table 7.
Thereafter, the entire apparatus is raised to the upper position by the elevating mechanism 34, the engaging portion 36 is detached from the workpiece W, the moving rod 23 is retracted, and the stopper 35 is retracted from the machining area. Next, the table 7 is lowered, the workpiece W is gripped by the chuck 6, the workpiece spindle 5 is rotated, and the spindle head 4 is moved up and down to perform turning.

  When the workpiece W is unloaded from the machine body 1 after the machining is finished, the gripping of the chuck 6 is released, the table 7 is raised to the delivery position, and the workpiece W is lifted, as shown in FIG. Then, the entire apparatus is lowered to the lower position by the lifting mechanism 34, and the engaging portion 36 is positioned behind the workpiece W. Here, when the motor 26 is driven to rotate the feed screw 25 and the moving rod 23 is moved forward, the stopper 36 is also moved forward, the engaging portion 36 comes into contact with the workpiece W, and the workpiece W is fed forward as it is. Then, the workpiece is transferred onto the conveyor 9 of the workpiece carrier 8 via the workpiece guide 10. Thereafter, when the moving rod 23 is moved backward, the first standby position is restored.

  As described above, also in the second embodiment shown in FIG. 3, the moving rod 23 having the engagement portion 36 with the workpiece W at the tip and moving in the front-rear direction, and the screw for screw-feeding the moving rod 23 in the front-rear direction by driving the motor. The feed mechanism (feed screw 25, motor 26, rotation transmission mechanism 27) and the entire workpiece transfer device 20 are arranged in a lower position where the engaging portion 36 interferes with the workpiece W in the front-rear direction and an upper portion where the workpiece W does not interfere with the workpiece W in the front-rear direction. An elevating mechanism 34 that moves up and down between the positions, and screwing the moving rod 23 back and forth by the screw feeding mechanism in a state where the engaging portion 36 is engaged with the work W at the lower position, Work W can be taken in and out. Therefore, the work W can be carried in and out without burden on the operator. Further, by adopting a screw feed mechanism, it is possible to carry out to a fixed position by setting a stroke according to the diameter of the workpiece W. Therefore, it is possible to handle a wide variety of workpieces.

In the first and second embodiments, the engaging member and the engaging portion are engaged with the inside of the ring-shaped workpiece. However, in the case of a solid workpiece instead of the ring-shaped workpiece, the outer side (front side) of the workpiece What is necessary is just to carry in into an aircraft body by engaging an engaging member or an engaging part.
Further, the forward / backward feed mechanism of the moving rod only needs to be stopped at a plurality of positions by a control device (not shown), such as a combination of a rack and pinion and a motor, or a combination of a piston, a cylinder and a solenoid valve. It does not matter.
Furthermore, the number of engaging members and engaging portions is not one, but a pair of them may be provided on the left and right sides, for example, and simultaneously engaged with the workpiece.
A gear can also be used as the rotation transmission mechanism.

  1 .... Airframe, 2 .... Bed, 3 .... Column, 4 .... Spindle head, 5 .... Work spindle, 6 .... Chuck, 7 .... Table, 8 .... Work transfer table, 9 .... Conveyor, 20 ..Work transfer device, 21 ..Device body, 23 ..Moving rod, 25 ..Feed screw, 26 ..Motor, 27 ..Rotation transmission mechanism, 28 ..Back plate, 29 ..Cylinder, 30. Piston rod, 31 .. engaging member, 33 .. vertical guide, 34 .. lifting mechanism, 35.

Claims (3)

In a vertical lathe comprising a spindle head on which a tool is mounted and a work spindle that is disposed below the spindle head and has a chuck for gripping a workpiece at an upper end. A workpiece transfer device for moving a workpiece back and forth in a predetermined horizontal direction,
A moving member movable back and forth in the predetermined direction;
A feed mechanism for moving the moving member to a predetermined position in the predetermined direction;
An engaging portion that is provided on the moving member and can project and retract between a downward projecting position that interferes with the workpiece in the predetermined direction and an accommodation position that does not interfere with the workpiece in the predetermined direction;
An actuating mechanism for moving the engaging portion in and out;
The moving member is moved in the predetermined direction by the feeding mechanism in a state where the engaging portion at the protruding position is engaged with the work, so that the work can be taken in and out. Vertical lathe work transfer device characterized by   The engaging portion is an engaging member whose intermediate portion is rotatably connected to a receiving plate provided at the tip of the moving member by a horizontal support shaft, and the operating mechanism engages the piston rod with the engaging portion. 2. The work conveying apparatus for a vertical lathe according to claim 1, wherein the work conveying device is a cylinder that is connected to an upper end of the member and rotates the engaging member by an expansion / contraction operation of the piston rod. In a vertical lathe comprising a spindle head on which a tool is mounted and a work spindle that is disposed below the spindle head and has a chuck for gripping a workpiece at an upper end. A workpiece transfer device for moving a workpiece back and forth in a predetermined horizontal direction,
A moving member movable back and forth engaging portion provided at the distal end in the predetermined direction of said workpiece,
A feed mechanism for moving the moving member to a predetermined position in the predetermined direction;
An elevating mechanism that moves the entire work conveying device up and down between a lower position where the engaging portion interferes with the work in the predetermined direction and an upper position where the engaging portion does not interfere with the work in the predetermined direction;
The moving member is moved in the predetermined direction by the feeding mechanism in a state where the engaging portion is engaged with the work at the lower position, so that the work can be taken in and out. Vertical lathe work transfer device characterized by

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