JP2007098530A - Work placing device and spindle pickup lathe with the device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work placing device, accurately picking up a work by a work pickup device. <P>SOLUTION: This work placing device includes: a work placing table 25 for placing a work W; and a base member 30 supporting the work placing table 25 through a work placing table inclination permitting and support means 31 and an elastic member 37. The work placing table inclination permitting support means 31 permits the work placing surface of the work placing table 25 to incline to the horizontal when the work pickup device descends to pick up the work W on the work placing table 25. The elastic member 37 presses the work W to the work pickup device against descending of the work pickup device when the work pickup device descends to pick up the work W on the work placing table 25, and holds the work placing bed 25 horizontally when the work pickup device is elevated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a spindle pick-up lathe that carries a workpiece by moving a spindle, and more particularly, to a workpiece placement device of a workpiece loading device that loads the material.

2. Description of the Related Art Conventionally, there is a vertical spindle moving lathe in which a spindle chuck faces downward and conveys a workpiece (for example, Patent Document 1). This type of spindle movement type lathe is also called a spindle pick-up lathe, and there is an advantage that a loader for carrying a workpiece to the spindle position becomes unnecessary and the configuration can be simplified.
JP-A-11-320314

  In the example described in Patent Document 1, the spindle moves beyond the work necessary area (machining area) to the upper part of the work table. Therefore, it is necessary to widen the movement range of the spindle. The width dimension becomes larger. Further, since the position of the workpiece placing table is far from the machining position, the distance that the spindle that grips the workpiece returns from the upper side of the workpiece placing table to the machining position is long, and the cycle time of the workpiece machining becomes long depending on the movement time.

  Therefore, a workpiece loading device for loading a workpiece into the machining area and a workpiece unloading device for unloading the workpiece from the machining area are provided at different positions in the spindle movement range. These workpiece loading device and workpiece unloading device An attempt was made to shorten the cycle time of workpiece machining by comprising a workpiece placement table to be placed and a placement table position switching device that switches the position of the workpiece placement table to the inside and outside of the machining area. (Japanese Patent Application No. 2004-296066).

  In the case of this configuration, the work pickup device needs to accurately pick up the work placed on the work placement table. The requirements for accurate pick-up are as follows: (1) the work is pressed against the work pick-up device with an appropriate strength to bring the work pick-up device and the work into close contact, and (2) the work is against the work pick-up device. It can be inclined to some extent, and each part of the work can be pressed against the work pickup device with the same strength. If these requirements can be satisfied, even if there is an error in the cutting process in the previous process, the work pick-up device picks up the work in the form of correcting the error in the previous process and can be processed on a lathe without any problems. .

An object of the present invention is to provide a workpiece placement device that can satisfy the above requirements so that a workpiece can be accurately picked up by the workpiece pickup device.
Another object of the present invention is to make the spindle pick-up lathe most effective when the work placing apparatus is applied to the spindle pick-up lathe.

  A workpiece placement device according to the present invention is a workpiece placement device for placing a workpiece to be supplied to a workpiece pick-up device that can be moved up and down, and a workpiece placement table on which a workpiece is placed, a workpiece placement table tilting permissible support means, and elasticity And a base member that supports the workpiece mounting table via the member, and the workpiece mounting table tilt allowable support means is configured to move the workpiece mounting table on the workpiece mounting table when the workpiece pickup device descends to pick up the workpiece on the workpiece mounting table. The mounting surface is allowed to be inclined with respect to the horizontal, and the elastic member works against the lowering of the workpiece pickup device when the workpiece pickup device is lowered to pick up the workpiece on the workpiece mounting table. Is pressed against the work pick-up device, and when the work pick-up device is raised, the work placing table is held horizontally. It is.

According to this configuration, when the workpiece pickup device is lowered and picks up the workpiece on the workpiece mounting table, the workpiece mounting table tilt allowable support means allows the workpiece mounting surface of the workpiece mounting table to be inclined with respect to the horizontal. In addition, since the workpiece is pressed against the workpiece pickup device against the lowering of the workpiece pickup device by the elastic member, the workpiece is brought into close contact with the workpiece pickup device even if there is a slight processing error or mounting posture error. Thus, the workpiece pickup device can accurately pick up the workpiece. Therefore, even if there is an error in the cutting process in the previous process, the error can be corrected when the work is picked up by the work pick-up device, and the lathe can be processed without any problem.
In addition, when the workpiece pickup device picks up the workpiece and moves up, the workpiece mounting table is held horizontally by the elastic member, so that the workpiece can be placed on the workpiece mounting table next time and the next workpiece pickup is performed. The workpiece can be picked up favorably by the apparatus.

The workpiece mounting table tilting permissible support means includes a hole of the base member and a lifting guide of the workpiece mounting table which is inserted with a gap with respect to the inner side surface of the hole and is movable up and down with respect to the base member. It is preferable to support the mounting table in a state in which it can move horizontally with respect to the base member.
In this case, the workpiece mounting table and the base member are brought into an engaged state in which the workpiece mounting table and the base member cannot be horizontally moved when the workpiece mounting table is raised, and the engagement state is canceled by the lowering of the workpiece mounting table due to the lowering of the workpiece pickup device. It is preferable to provide a positioning means that makes the mounting table tilt allowable support means effective.
When the workpiece mounting table tilt permissible support means is composed of a hole of the base member and a lifting guide of the workpiece mounting table which is inserted with a gap with respect to the inner surface of the hole and is movable up and down with respect to the base member, It is possible to smoothly perform an operation in which the workpiece mounting surface of the workpiece mounting table is inclined with respect to the horizontal. For this reason, for example, when the workpiece mounting surface is tilted by absorbing the tilt of the workpiece end surface during the previous workpiece transfer, the original tilt is maintained by friction, and there is no adverse effect during the current transfer.
When the workpiece mounting table is raised, the workpiece mounting table and the base member are brought into an engagement state incapable of horizontal movement, and the engagement state is canceled by the lowering of the workpiece mounting table due to the lowering of the workpiece pickup device, and the workpiece mounting table tilting allowable support is performed. If the positioning means that makes the means effective is provided, even if there is a gap between the inner surface of the hole of the base member and the lifting guide, the horizontal position of the work mounting table is regulated by the positioning means when the work mounting table is raised. Therefore, it is possible to prevent the workpiece from being placed in a misaligned state with respect to the workpiece mounting table.

When the workpiece mounting device of the present invention is applied to a spindle pick-up lathe, the workpiece pickup device is preferably a spindle device that can drive the lathe spindle to move up and down.
When the workpiece pick-up device is a lathe spindle device, the spindle device can pick up the workpiece and move to the operation for machining as it is, so that the work flow can be improved.

A workpiece placement device according to the present invention is a workpiece placement device for placing a workpiece to be supplied to a workpiece pick-up device that can be moved up and down. And a base member that supports the workpiece mounting table via the member, and the workpiece mounting table tilt allowable support means is configured to mount the workpiece mounting table on the workpiece mounting table when the workpiece pickup device descends and picks up the workpiece on the workpiece mounting table. The mounting surface is allowed to be inclined with respect to the horizontal, and the elastic member works against the lowering of the workpiece pickup device when the workpiece pickup device is lowered to pick up the workpiece on the workpiece mounting table. Is pressed against the workpiece pick-up device, and when the workpiece pick-up device is raised, the workpiece mounting table is held horizontally. Therefore, it is possible for the workpiece pickup device to accurately pick up the workpiece placed on the workpiece mounting table, and even when there is an error in the cutting process in the previous process, Errors can be corrected and lathe machining can be performed without problems.
In this invention, the workpiece mounting table tilting allowable support means includes a hole in the base member and a lifting guide for the workpiece mounting table that is inserted into the inner surface of the hole with a gap and is movable up and down with respect to the base member. In the case where the workpiece mounting table is supported in a state in which the workpiece mounting table can be horizontally moved with respect to the base member, it is possible to smoothly perform an operation in which the workpiece mounting surface of the workpiece mounting table is inclined with respect to the horizontal. Therefore, for example, when the workpiece mounting surface is tilted by absorbing the tilt of the workpiece end surface during the previous workpiece transfer, the original tilt is maintained by friction, and there is no adverse effect during the current transfer.
In addition, the workpiece mounting table and the base member are brought into an engaged state in which the workpiece mounting table and the base member cannot be moved horizontally when the workpiece mounting table is raised, and the engagement state is canceled by the lowering of the workpiece mounting table due to the lowering of the workpiece pickup device. In the case where the positioning means for enabling the support for tilting the mounting table is provided, even if there is a gap between the inner surface of the hole of the base member and the lifting guide, the workpiece mounting table is moved by the positioning means when the workpiece mounting table is raised. The horizontal position of the workpiece is regulated, and the workpiece is prevented from being placed out of alignment with respect to the workpiece mounting table.

  Further, the spindle pick-up lathe of the present invention is an apparatus in which the above-described workpiece placing device is applied to a spindle pick-up lathe, and the work pick-up device is a spindle device that can drive the spindle of the lathe up and down. The workpiece can be picked up, and the operation for machining can be performed as it is, so that the work flow can be improved. In addition, since it is not necessary to provide another device for delivering the workpiece between the workpiece placing device and the spindle device, the configuration of the entire lathe can be simplified.

  An embodiment of the present invention will be described with reference to the drawings. The machine tool of this embodiment is a machine tool with a control panel and an operation panel, and is a vertical spindle moving lathe that serves as a spindle pick-up lathe. In FIG. 1, a lathe 1 as a machine tool includes a machine tool body 2 having a substantially rectangular parallelepiped machine body cover 3 whose front portion is a vertically long rectangle, and a control installed on the back surface of the machine tool body 2. The panel 4 and the operation panel 5 installed in the front part are provided.

As shown in FIG. 2, the machine tool body 2 includes a spindle chuck 6 that supports the workpiece W downward, and a tool support that performs cutting on the workpiece W that is provided in the machining region R and supported by the spindle chuck 6. Means 7, spindle moving means 8 for moving the spindle chuck 6 up and down, left and right, workpiece loading device 11 and workpiece unloading device 12 provided at different positions in the laterally movable region of the spindle chuck 6; Is provided. The main spindle chuck 6 and the main spindle moving means 8 constitute a main spindle apparatus, and this main spindle apparatus is a work pick-up apparatus that picks up a work on a work mounting table 25 described later.
This machine tool main body 2 performs cutting such as turning by moving the spindle chuck 6 vertically and horizontally with respect to the tool of the fixed tool support means 7. For this reason, the spindle moving means 8 and its wiring, piping system, etc. constitute the processing equipment 10 arranged in the processing equipment installation area S partitioned from the processing area R.

  The main shaft moving means 8 is a main shaft that can be moved up and down via a left and right moving table 14 that can move left and right on a guide 13 that extends in the left and right directions on the bed 9 and a guide 15 that extends in the vertical direction on the left and right moving table 14. A stand 16 is provided. The spindle chuck 6 is provided at the tip of the spindle 17 supported by the spindle stock 16. The spindle chuck 6 is configured to grip the workpiece W with a plurality of chuck claws 6a.

  Specifically, the headstock 16 is mounted on a lifting platform 18 that is installed on the left and right moving platform 14 through the guide 15 so as to be movable up and down. The spindle motor 19 installed on the lifting platform 18 rotates the spindle 17. Driving is performed. The headstock 16 is moved up and down by a drive source 20 for raising and lowering such as a motor installed on the left and right movable table 14, and a rotation / straight-forward conversion mechanism such as a ball screw for converting the rotation of the drive source 20 for raising and lowering into a vertical motion (see FIG. Not shown). The left / right movement of the left / right moving table 14 is performed by a left / right moving drive source 21 installed on the bed 9 and a rotation / straight-forward conversion mechanism (not shown) such as a screw for converting the rotation of the left / right moving drive source 21 into a left / right operation. ) And done.

  The tool support means 7 is a means for supporting a tool 22 such as a cutting tool or a rotary tool for cutting, and is provided with two types: a turret tool post 7A and a comb-type fixed tool post 7B. . The turret tool post 7A is installed on the side wall portion in the processing region R in front of the bed 9 so as to be turnable about a horizontal axis extending in the left-right direction. The turret tool post 7A is capable of turning operation for indexing a tool attached to the peripheral surface, but has no moving function. The fixed tool post 7B is fixedly installed on the front surface of the bed 9 in the processing region R.

  The processing area R in the machine body cover 3 is partitioned from the processing equipment installation area S by a slide cover 70 (FIG. 1). The machining area R is a space in which the spindle chuck 6 and the tool support means 7 are located and performs machining of the workpiece W. The machining equipment installation area S is a space in which the machining equipment 10 such as the spindle moving means 8 is installed. It is.

  In FIG. 1, the machine body cover 3 has a back surface opening 71 on the back surface that allows an operator to enter the machine body cover 3 for maintenance of the processing equipment 10, and the control panel 4 covers the back surface opening 71. is doing. The control panel 4 is supported by upper and lower support members 72 and 73 extending rearward from the machine body cover 3 so as to be capable of opening and closing about the vertical axis O1. The control panel 4 is provided in the upper part of the machine body cover 3, and a chip conveyor 74 is disposed below the control panel 4 so as to be retractable rearward.

  An opening / closing cover portion 75 for allowing an operator to enter the machine is provided at the center in the width direction of the front portion of the machine body cover 3, and the operation panel 5 is located above and below the opening / closing cover portion 75. The operator can switch the position between the retracted position and the retracted position. The operator puts the upper body into the machine via the opening / closing cover 75 and performs maintenance work (setup of the chuck and tools) in the machine. . The operation panel 5 is divided into left and right divided operation panel parts 5A and 5B, and each of the divided operation panel parts 5A and 5B rotates around the vertical turning axis O2 around the bracket 76 of the machine body cover 3 at its outer end. It is supported freely.

  As shown in FIG. 3, a recessed portion 23 and a recessed portion 24 that are recessed from the left and right ends of the body cover 3 toward the center are provided on the left and right sides of the front portion of the body cover 3. A workpiece carry-in device 11 is provided in the recess 23 and a workpiece carry-out device 12 is provided in the recess 24. Therefore, the workpiece carry-in device 11 and the workpiece carry-out device 12 are arranged in the left-right width of the machine body cover 3 with the processing region R interposed therebetween. The recesses 23 and 24 are respectively formed with opening portions 60 described later serving as a workpiece carry-in port to the machining region R and a workpiece carry-out port from the machining region R.

  The workpiece carry-in device 11 and the workpiece transfer device 12 include a workpiece mounting table 25 that can enter and exit the processing region R, and the workpiece chuck 25 and the workpiece W are transferred by the workpiece mounting table 25. The outline of delivery of the workpiece W is as follows. The workpiece W is supplied to the workpiece placement table 25 of the workpiece carry-in device 11 located outside the machining region R, and the workpiece placement table 25 moves into the machining region R. The spindle chuck 6 picks up the workpiece W from the workpiece mounting table 25 of the workpiece carry-in device 11 by moving up and down, left and right, undergoes turning by the tool support means 7, and loads the workpiece on the workpiece carry-out device 12 located in the machining region R. The work W is transferred to the mounting table 25. Upon receiving the workpiece W, the workpiece mounting table 25 of the workpiece carry-out device 12 moves out of the processing region R, and the workpiece W is discharged there.

  Hereinafter, although the detail of the workpiece carrying-in apparatus 11 and the workpiece conveyance apparatus 12 is demonstrated, since both the apparatuses 11 and 12 are the symmetrical structures mutually, the workpiece carrying-in apparatus 11 is demonstrated as a representative here. 4 to 6 are general perspective views showing different states of the work loading device, FIG. 7 is a side view of the work loading device, and FIGS. 8 to 10 are diagrams showing respective parts of the work loading device.

  The workpiece carry-in device 11 (or the workpiece carry-out device 12) includes a workpiece placement device 26 including the workpiece placement table 25, an inside / outside placement table position switching mechanism 27 that switches the position of the workpiece placement table 25 into and out of the processing region R, It comprises a front / rear mounting table position switching mechanism 28 that switches the position of the workpiece mounting table 25 located outside the processing region R back and forth.

  As shown in FIG. 8, in the workpiece mounting device 26, the workpiece mounting table 25 is supported above the distal end portion of the base member 30 via a workpiece mounting table tilting allowable support means 31 and a compression spring 37. The workpiece mounting table 25 is a plate material having a substantially triangular planar shape, and a total of three workpiece holding pins 25a are provided so as to protrude upward on a line connecting the center O3 and each corner. The workpiece W is placed between the workpiece holding pins 25a and placed on the upper surface of the workpiece placing table 25, which is a workpiece placing surface. The screw holes 25b for attaching the work holding pins 25a are provided at a plurality of locations having different distances from the center O3, so that the screw holes 25b for attaching the work holding pins 25a can be changed according to the dimensions of the work W. It has become.

The workpiece mounting table tilting allowable support means 31 has the following structure. That is, the elevating guide 34 is loosely fitted in the guide hole 33 formed in the base member 30 so as to freely move up and down, and the upper end of the elevating guide 34 is fixed to the upper plate 35 fixed to the lower surface of the workpiece mounting table 25. The lower end of the lifting guide 34 is fixed to a lower plate 36 located below the base member 30. The elevating guide 34 is inserted with a gap 34 a into the inner surface of the guide hole 33. The guide hole 33 and the elevating guide 34 are arranged at equal intervals at a plurality of locations (six locations in this embodiment) concentrically with the center O3. The plurality of sets of guide holes 33 and lifting guides 34 constitute a workpiece mounting table tilt allowable support means 31. The workpiece mounting table tilt allowable support means 31 is a spindle device (spindle chuck 6, spindle moving means) which is a work pickup device. When 8) descends and picks up the workpiece on the workpiece mounting table 25, the workpiece mounting surface of the workpiece mounting table 25 is allowed to tilt with respect to the horizontal.
The guide hole 33 is a stepped hole having a large diameter on the upper side, and the compression spring loosely fitted on the outer periphery of the elevating guide 34 between the step surface of the large diameter portion 33a and the lower surface of the upper plate 35. 37 is provided. The compression spring 37 presses the workpiece against the spindle device against the lowering of the spindle device when the spindle device is lowered and picks up the workpiece on the workpiece mounting table 25, and when the spindle device is raised, the workpiece is loaded. This is an elastic means for holding the mounting table 25 horizontally.
In addition, positioning recesses 38 are formed on the lower surface of the base member 30 at a plurality of locations (three locations in this embodiment) concentrically with the center O3. A positioning pin 39 is provided so as to protrude upward on the upper surface of the lower plate 36 so as to face the recess 38. The positioning recesses 38 and the positioning pins 39 bring the workpiece mounting table 25 and the base member 30 into an engaged state in which the workpiece mounting table 25 and the base member 30 cannot be moved horizontally when the workpiece mounting table 25 is raised (FIG. 8B). It is a positioning means that acts so that the engagement state is canceled by lowering (FIG. 8C).

When the workpiece W is not placed or when the workpiece W is placed stationary, the workpiece placing table 25 is lifted by the compression spring 37 as shown in FIG. Is engaged with the positioning recess 38, the horizontal position of the workpiece mounting table 25 is accurately determined. Specifically, the horizontal position of the workpiece mounting table 25 is always accurately positioned by the engagement between the tapered bottom surface of the positioning recess 38 and the tapered tip surface of the positioning pin 39. Further, since a horizontal restoring force is applied to the workpiece mounting table 25 by the compression springs 37 which are elastic members provided at a plurality of locations concentrically with the center O3, the workpiece mounting table 25 is kept horizontal at this time. .
If the workpiece placing table 25 is not horizontal, the workpiece W placed thereon is inclined. Although depending on the shape of the workpiece W, if the workpiece W is inclined, the outer portion of the workpiece W is positioned on the outer side in the horizontal direction with respect to the position of the chuck claw 6a of the spindle chuck 6. There is a possibility that the spindle chuck 6 that has been lowered interferes with the workpiece W and cannot pick up the workpiece W. For this reason, it is necessary to keep the workpiece mounting table 25 horizontal.

  When picking up the workpiece W from the workpiece mounting table 25 by the spindle chuck 6 which is a workpiece pickup device, the spindle chuck 6 holds the workpiece W while pushing it down. As a result, as shown in FIG. 8C, the workpiece mounting table 25 is pushed down via the workpiece W, the engagement between the positioning pin 39 and the positioning recess 38 is released, and the workpiece mounting table 25 is freely tilted. Will be able to. At the same time, because the workpiece W is pressed against the spindle chuck 6 by the tension of the compression spring 37, the spindle chuck 6 can accurately grip the workpiece W. Even if there is an error in the cutting process in the previous process, the spindle chuck 6 picks up the workpiece W in the form of correcting the error in the previous process, and the machining on the lathe can be performed without any problem. After the spindle chuck 6 picks up the workpiece W, the workpiece mounting table 25 is lifted by the compression spring 37 and returns to the state of FIG.

FIG. 11 shows a workpiece mounting device having different workpiece mounting table tilting support means. The workpiece placement table tilting allowable support means of this workpiece placement device is a pivot mechanism 81 provided below the center O3 of the workpiece placement table 25, and this pivot mechanism 81 is a bush receiving on the workpiece placement table 25 side. 81a and the spherical bush 81b on the base member 30 side are in contact with each other on a spherical surface. On the circumference centered on the pivot mechanism 81, compression springs 82 for pressing the workpiece mounting table 25 and the base member 30 are arranged at a plurality of locations (for example, 6 locations). Also in the case of the workpiece mounting table tilt allowable support means 81, the workpiece mounting surface of the workpiece mounting table 25 is tilted with respect to the horizontal when the spindle device is lowered and picks up the workpiece of the workpiece mounting table 25, as described above. Act to allow you to do.
In a state where the workpiece W is not placed or a state where the workpiece W is placed stationary, the force for pressing the workpiece placement table 25 of the plurality of compression springs 82 is balanced. Is kept level. When the workpiece W is picked up from the workpiece mounting table 25 by the spindle chuck 6, the workpiece W is pressed against the spindle chuck 6 by the compression spring 82, so that the spindle chuck 6 can accurately grip the workpiece W.

  The inside / outside mounting table position switching mechanism 27 and the front / rear mounting table position switching mechanism 28 are shown in FIG. The internal / external mounting table position switching mechanism 27 includes an internal / external mounting table position switching drive motor 40 and a cam case 41 integrated with the motor 40, and an output shaft 42 projecting downward from the cam case 41 to the output shaft 42. The rear end portion of the base member 30 is fixedly supported. A cam mechanism (not shown) in the cam case 41 outputs rotation of the motor 40 as forward and reverse repetitive rotation within a predetermined angle range of the output shaft 42. The range of repeated rotation of the output shaft 42 is, for example, 90 °. As the output shaft 42 rotates, the workpiece mounting table 25 rotates horizontally, and the workpiece mounting table 25 is positioned at the neutral position N located outside the processing region R and the workpiece transfer position P1 (located inside the processing region R). In the case of the work carry-out device 12, the work receiving position P2) is switched. The front-rear direction positions of the workpiece transfer position P1 and the workpiece receiving position P2 are the same positions as the axis O4 of the spindle chuck 6.

  The front / rear mounting table position switching mechanism 28 includes two upper and lower guide bars 50, 51 for guiding the work mounting table 25 so as to be movable in the front / rear direction, and before / after moving the work mounting table 25 along the guide bars 50, 51. And a cylinder 52 for driving the mounting table position. The upper and lower guide bars 50 and 51 are provided with both ends fixed to the body cover 3, and a slide member 54 provided at the upper end of the upper vertical plate 53 fixed to the cam case 41 is slidable on the upper guide bar 50. Similarly, a slide member 56 provided at the lower end of the lower vertical plate 55 fixed to the cam case 41 is slidably fitted to the lower guide bar 51. The cylinder 52 is provided with its base fixed to the body cover 3, and the tip of the piston rod 52 a of the cylinder 52 is connected to the upper vertical plate 53. As a result, when the cylinder 52 is expanded and contracted, the workpiece mounting table 25 moves back and forth along the guide bars 50 and 51 together with the motor 40 and the cam case 41. The rear end of the back-and-forth movement stroke is the neutral position N, and the front end is the work supply position Q1 (in the case of the work unloading device 12, the work discharge position Q2).

  As shown in FIGS. 9 and 10, an opening 60 for entering and exiting the workpiece mounting table 25 is formed at each boundary between the recesses 23 and 24 and the processing region R, and the opening 60 can be opened and closed. A cover 61 is provided. The opening / closing cover 61 is rotatable up and down around a rotation axis 63 along the front-rear direction by rotation support portions 62 provided at two positions in the front and rear of the lower end portion of the opening / closing cover 61. When the opening / closing cover 61 is at the standing position A (FIG. 9) at the upper end of the rotation range, the opening 60 is closed, and when the opening / closing cover 61 is at the fall position B (FIG. 10) at the lower end of the rotation range. The opening 60 is opened. FIG. 10C shows a state in the middle of opening and closing.

  The opening / closing operation of the opening / closing cover 61 is interlocked with the position switching operation inside and outside the processing region R of the workpiece mounting table 25. The mounting table / opening / closing cover interlocking mechanism 65 engages a guide pin 68 provided on the workpiece mounting table 25 with a cam groove 67 formed in a left / right moving plate 66 that is movable in the left / right direction. The horizontal rotation is converted into the left / right movement of the left / right moving plate 66, and the left / right moving plate 66 and the opening / closing cover 61 are connected to each other through two links 69 at the front and rear, and interlocked with the left / right movement of the left / right moving plate 66. The opening / closing cover 61 is rotated up and down around the rotation axis 63.

  The cam groove 67 is a curved groove that is located on the left and right inner sides and is convex on the left and right inner sides as it goes rearward. By adopting this shape, the lateral displacement of the guide pin 68 due to the rotation of the work mounting table 25 can be smoothly transmitted to the left / right moving plate 66, and the left / right moving plate 66 when the work mounting table 25 rotates. Thus, the opening / closing operation of the opening / closing cover 61 is made smooth. In addition, the linear guide groove 69 formed in the front-rear direction following the front end portion of the curved cam groove 67 is a front-rear guide groove 69 between the neutral position N and the work supply position Q1. The guide pin 68 is guided when moving.

  The workpiece carry-in device 11 configured as described above operates as follows. In the initial state, the workpiece mounting table 25 stands by at the neutral position N, and the opening / closing cover 61 closes the opening 60 (FIG. 4). When the work is started, the work mounting table 25 moves forward to the work supply position Q1 (FIG. 5). Then, the workpiece W is placed on the workpiece placing table 25 by hand or the like at the workpiece supply position Q1. The workpiece mounting table 25 on which the workpiece W is placed moves backward to the neutral position N and further rotates to the workpiece transfer position P1 (FIG. 6). At that time, the opening / closing cover 61 is opened in conjunction with the rotation of the workpiece mounting table 25. The workpiece W is picked up from the workpiece mounting table 25 by the spindle chuck 6 at the workpiece transfer position P1. The workpiece mounting table 25 that has passed the workpiece W rotates to the neutral position N. At that time, the opening / closing cover 61 is closed in conjunction with the rotation of the workpiece mounting table 25. Thereafter, the same operation as before is repeated.

  On the other hand, the workpiece carry-out device 12 operates as follows. Before the turning process is completed, the workpiece mounting table 25 has moved to the workpiece receiving position P2, and the processed workpiece W is received from the spindle chuck 6 at the workpiece receiving position P2. The workpiece mounting table 25 that has received the workpiece W rotates to the neutral position N and further advances to the workpiece discharge position Q2. Then, the workpiece W is discharged from the workpiece mounting table 25 by hand or the like at the workpiece discharge position Q2. The workpiece mounting table 25 from which the workpiece W has been discharged moves backward to the neutral position N and further rotates to the workpiece receiving position P2. Thereafter, the same operation as before is repeated. Also in the case of the workpiece carry-out device 12, the opening / closing cover 61 opens and closes in conjunction with the rotation of the workpiece mounting table 25.

  In the operation of the workpiece carry-in device 11 and the workpiece carry-out device 12, the workpiece mounting table 25 of the workpiece carry-in device 11 reciprocates between the workpiece transfer position P1 and the workpiece supply position Q1 and supplies the workpiece W, and the workpiece carry-out device 12 The workpiece mounting table 25 reciprocates between the workpiece receiving position P2 and the workpiece discharge position Q2 to discharge the workpiece W. The spindle chuck 6 that grips the workpiece W moves up and down and to the left and right to turn the workpiece W. Performed in parallel with the operation to be performed.

  According to the spindle pick-up lathe 1 having this configuration, the workpiece loading device 11 and the workpiece unloading device 12 are provided as described above, and the workpiece mounting table 25 is moved inside and outside the machining region R by the internal / external mounting table position switching mechanism 27, respectively. It is possible to go in and out. For this reason, the range of movement of the spindle chuck 6 is within the machining region R, and the entire lathe can be narrowed. In addition, since the work W is carried in and out by the movement of the work mounting table 25 and the movement of the main spindle chuck 6, the movement distance of the main spindle chuck 6 when the work W is carried in and out can be reduced. Since the movement of the mounting table 25 and the movement of the spindle chuck 6 can be performed in parallel, the time required for loading and unloading the workpiece W is shortened.

  Since the workpiece carry-in device 11 and the workpiece carry-out device 12 are provided at different locations, it is not necessary to wait for the workpiece W to be carried into the workpiece placement table 25 of the workpiece carry-in device 11 without waiting for the finished workpiece W to be carried out. When it is outside the region R, it is possible to load and unload the workpiece on the workpiece mounting table 25 at any time. Therefore, the work supply and discharge time can be shortened.

  Furthermore, the movement of the workpiece mounting table 25 is a combination of the movement in and out of the processing region R by the inner / outer mounting table position switching mechanism 27 and the forward / backward movement outside the processing region R by the front / rear mounting table position switching mechanism 28. The workpiece mounting table 25 can be moved forward to a position away from the lathe body outside the machining region R, and workpiece setting and removal can be performed at that position. At this position, the lathe body does not get in the way, so the above setting and removing operations are easy to perform. In addition, when an operator standing in front of a lathe performs workpiece setting and removal, the operator can perform these operations only by facing sideways, so that work efficiency is improved.

Since the workpiece carry-in device 11 and the workpiece carry-out device 12 are arranged so as to be divided to the left and right across the machining region R, it is easy to construct a machining line in which the workpiece flow is in one direction.
Moreover, since the workpiece carry-in device 11 and the workpiece carry-out device 12 are housed within the left and right widths of the machine body cover 3, the entire structure can be made clean and compact. Since the machine body cover 3 is provided with the recesses 23 and 24 and the workpiece mounting table 25 is moved in and out between the machining region R and the recesses 23 and 24, the machine body cover 3 is provided even when the workpiece mounting table 25 is outside the machining region R. The workpiece loading table 25 does not jump out on both sides of the workpiece, and the workpiece carry-in device 11 and the workpiece carry-out device 12 are always accommodated within the width of the body cover 3. In addition, since the workpiece mounting table 25 can be moved forward from the recesses 23 and 24, the workpiece W can be set to or removed from the workpiece mounting table 25 at the position where the workpiece mounting table 25 is moved forward. Workability can be improved.

  The opening / closing cover 61 is opened and closed in the vertical direction around the rotation axis 63 provided along the front-rear direction provided at the lower end thereof, and is switched between a standing position A that closes the opening 60 and a fall position B that is located in the processing region R. Therefore, the position of the opening / closing cover 61 when it is in the fall position B is located below the workpiece mounting table 25 and the spindle chuck 6, and there are few restrictions on transfer of workpieces between the workpiece mounting table 25 and the spindle chuck 6, Further, the opening / closing cover 61 does not interfere with the spindle chuck 6. For this reason, after the delivery of the workpiece is completed, the spindle chuck 6 can quickly start an operation for machining, the cycle time required for machining per workpiece is shortened, and the machining efficiency is improved.

  In addition, since the support structure of the opening / closing cover 61 is as described above, the mounting table / opening / closing cover interlocking mechanism 65 that opens and closes the opening / closing cover 61 in conjunction with the operation of the workpiece mounting table 25 does not interfere with the workpiece mounting table 25. It is possible to provide a lathe with a simple configuration that does not require a drive source for driving the opening / closing operation of the opening / closing cover.

1 is a perspective view of a spindle pick-up lathe according to an embodiment of the present invention. (A) is the fracture | rupture front view which shows the internal structure of the same lathe, (B) is a fracture | rupture side view of the same lathe. It is a fracture | rupture top view which shows the relationship between the workpiece carrying-in apparatus of the same lathe, a workpiece carrying-out apparatus, and a spindle chuck. It is a perspective view which shows one state of a workpiece | work carrying-in apparatus. It is a perspective view which shows the different state of a workpiece | work carrying-in apparatus. It is a perspective view which shows the further different state of a workpiece | work carrying-in apparatus. It is a side view of a workpiece carrying-in apparatus. (A) is a plan view of the workpiece placement device, (B) is a partially sectional side view of the workpiece placement device enlarged and displayed partially, (C) shows a different state of the workpiece placement device. It is a cross-sectional side view of the principal part. (A) is a front view which mainly shows one state of an opening / closing cover and a mounting base / opening / closing cover interlocking mechanism, and (B) is a plan view thereof. (A) is a front view mainly showing different states of the opening / closing cover and the mounting table / opening / closing cover interlocking mechanism, (B) is a plan view thereof, and (C) is a plan view showing a state in the middle of opening / closing of the opening / closing cover. It is a cross-sectional side view of the principal part of a different workpiece | work mounting apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lathe 2 ... Machine tool main body 3 ... Machine body cover 4 ... Control panel 5 ... Operation panel 6 ... Spindle chuck (work pick-up device)
7 ... Tool support means 8 ... Spindle moving means (work pickup device)
DESCRIPTION OF SYMBOLS 9 ... Bed 11 ... Work carrying-in apparatus 12 ... Work carrying-out apparatus 25 ... Work mounting base 27 ... Inside / outside mounting base position switching mechanism 28 ... Front-and-rear mounting base position switching mechanism 31 ... Work mounting base inclination permissible support means 33 ... Guide hole 34 ... Elevation Guide 37 ... Compression spring (elastic means)
38 ... Positioning recess (positioning means)
39 ... Positioning pin (positioning means)
61 ... Opening / closing cover 65 ... Mounting base / opening / closing cover interlocking mechanism R ... Processing area W ... Workpiece

Claims (4)

A workpiece placement device for placing a workpiece to be supplied to a freely movable workpiece pickup device,
A workpiece mounting table for mounting the workpiece, and a base member for supporting the workpiece mounting table via the workpiece mounting table tilting allowable support means and the elastic member;
The workpiece mounting table tilting permissible support means allows the workpiece mounting surface of the workpiece mounting table to be tilted with respect to the horizontal when the workpiece pickup device is lowered and picks up the workpiece on the workpiece mounting table. ,
When the workpiece pickup device is lowered and picks up the workpiece on the workpiece mounting table, the elastic member presses the workpiece against the workpiece pickup device against the lowering of the workpiece pickup device, and when the workpiece pickup device is raised. A workpiece placement device for holding a workpiece placement table horizontally.   The workpiece mounting table tilting permissible support means includes a hole of the base member and a lifting guide of the workpiece mounting table which is inserted with a gap with respect to the inner surface of the hole and is movable up and down with respect to the base member. The workpiece mounting apparatus according to claim 1, wherein the mounting table is supported so as to be horizontally movable with respect to the base member.   The workpiece mounting table and the base member are brought into an engaged state in which the workpiece mounting table and the base member cannot be horizontally moved when the workpiece mounting table is raised, and the engagement state is canceled by the lowering of the workpiece mounting table due to the lowering of the workpiece pickup device, and the workpiece mounting table is inclined. The workpiece mounting apparatus according to claim 2, further comprising a positioning unit that makes the allowable support unit effective.   4. A spindle pick-up lathe provided with the workpiece mounting device according to claim 1, wherein the workpiece pickup device is a spindle device capable of driving the spindle of the lathe up and down.

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