JPH1119802A - Workpiece mounting device in main spindle moving type vertical machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a workpiece mounting device whereby a material workpiece can be surely clamped by a chuck without applying a large load to a main spindle side, when the material workpiece on a workpiece loading base is received by a spindle side chuck. SOLUTION: A workpiece mounting device 3, provided in a main spindle moving type vertical lathe 1 moving a main spindle base 4 supporting a main spindle 5 having an axial line in a vertical direction able to rotate in at least a main spindle axial line direction and clamping a workpiece able to mount/remove it by a chuck provided in a tip end of the spindle, has a material workpiece mounting part 29 mounting a material workpiece 7 so as to be opposed to the chuck. Here, the material workpiece mounting part 29 has a material workpiece mounting base mounting the material workpiece 7, support part supporting the material workpiece mounting base able to move in the spindle axial line direction also energizing the base to a chuck side of main spindle axial line, and a swivel means 55 pressing a peripheral surface of the material workpiece 7 on the material workpiece loading base by a contact member swiveled to be associated with lowering action of the material workpiece mounting base to position the material workpiece 7 in almost the center position on the material workpiece loading base.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a headstock which rotatably supports a spindle having an axis in a vertical direction or a direction inclined at a predetermined angle with respect to a vertical plane, at least moves in the spindle axis direction to rotate the spindle. The present invention relates to a work placement device provided in a vertical machine tool such as a spindle moving type vertical lathe that detachably grips a work (workpiece) with a chuck provided at a front end.

[0002]

2. Description of the Related Art Among lathes of machine tools, a chuck is attached to the tip of a spindle, and a workpiece is gripped and rotated by the chuck. The lathe includes a type in which the spindle is oriented in a horizontal direction and an axis of the spindle. There is known a vertical lathe in which the vertical direction (vertical direction) is turned. For example, the vertical numerically controlled lathe (vertical NC lathe) with a work index table disclosed in Japanese Patent Application Laid-Open Nos. 62-166902 and 62-199301 is a fixed spindle type, so that the power is high. The structure was complicated because it was necessary to provide a material extruder (hydraulic cylinder, etc.) for raising and lowering the material to attach and detach the material to and from the chuck, and a hydraulic cylinder for reciprocating the index table. .

Further, an NC lathe disclosed in Japanese Patent Application Laid-Open No. 60-249501 and a Japanese Patent Application Publication No.
The machine tool disclosed in Japanese Patent No. 46321 discloses a machine tool in which a spindle is moved and a chuck at a spindle end directly grips a workpiece or a workpiece to perform machining. The structure is simplified.

[0004]

However, workpieces and the like processed by such a machine tool have variations particularly in the material dimensions (for example, diameter dimensions, axial dimensions). Despite this variation, Japanese Patent Application Laid-Open No. 60-24950
In the NC lathe described in JP-A No. 1 and the machine tool described in Japanese Patent Publication No. 2-46321, the workpiece can be securely gripped and released, and the chuck is pressed against the workpiece more than necessary so that the machine tool side can be used. (Especially, the spindle side) is required not to apply an excessive load. Further, the workpiece or the like must always be set within a range where the chuck can grip the chuck. However, Tokiko 2-463
The structure disclosed in Japanese Patent Publication No. 21 and the like is not configured in consideration of such variations and the like, and thus has a problem that a gripping operation cannot be performed when the material dimensions vary.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and when a workpiece on a workpiece mounting portion is received by a spindle-side chuck, the workpiece is chucked without applying a large load to the spindle side. Hold firmly,
When transferring the processed work from the spindle side chuck to the work mounting part, the spindle moving type vertical machine tool can smoothly place the processed work on the work mounting part without being damaged by collision, drop, etc. An object of the present invention is to provide a work placing device. Another object of the present invention is to provide a spindle-moving vertical machine tool capable of securely holding a workpiece with a chuck even when the workpiece is appropriately placed on the workpiece mounting portion without much care by an operator. To provide a work mounting device.

[0006]

In order to achieve the above-mentioned object, a work placement device for a vertical spindle type machine tool according to the present invention is provided with an axis extending in a vertical direction or a direction inclined at a predetermined angle with respect to a vertical plane. A headstock that rotatably supports a spindle having a spindle is provided on a spindle moving type vertical machine tool that moves at least in the spindle axis direction and detachably grips a workpiece with a chuck provided at a front end of the spindle. A work placement device having a material work placement portion on which a material work is placed so as to face a chuck, and a processed work placement portion on which a processed work is placed, wherein the material work placement portion At least one of the mounting portions of the processed work is mounted on a work table on which the material work or the processed work is mounted, and the work table is movably supported in the main shaft axis direction. And a support portion for biasing the chuck side of the spindle axis as well as.

A work mounting apparatus according to a preferred embodiment of the present invention is characterized in that a headstock that rotatably supports a spindle having an axis in a vertical direction or a direction inclined at a predetermined angle with respect to the vertical plane at least in the spindle axis direction. A material work mounting portion provided on a spindle moving type vertical machine tool that moves and grips a work detachably with a chuck provided at a front end of the main shaft, and on which a material work is mounted so as to face the chuck. Wherein the material work mounting portion has a material work mounting table on which the material work is mounted, and supports the material work mounting table so as to be movable in the main shaft axis direction. The material work on the material work table is supported by a support portion that urges the chuck axis side of the spindle axis and a contact member that swings in conjunction with the lowering operation of the material work table. By pressing the outer peripheral surface, and a rocking means for positioning said raw workpiece substantially centered position on placement platform the raw workpiece.

A push rod protruding from the chuck is provided in a state where the push rod is urged toward the material work placing table side of the spindle axis, and the chuck is used to grip the material work on the material work placing table. By the operation of the main shaft being lowered and the push rod pressing the material work toward the material work pedestal, the material work pedestal is lowered against the spring force of the spring member of the support portion, and In conjunction with the lowering operation of the work table, the plurality of contact members disposed around the material work table swing, thereby being positioned at substantially the center position on the work table. It is preferable that the material work is held by the chuck.

According to another aspect of the present invention, there is provided a workpiece mounting apparatus, wherein a headstock rotatably supporting a spindle having an axis in a vertical direction or a direction inclined at a predetermined angle with respect to a vertical plane has at least the spindle axis direction. The workpiece is placed on a spindle-moving vertical machine tool that moves and moves the workpiece with a chuck provided at the front end of the spindle, and the workpiece is placed so as to face the chuck. A workpiece placement device having a portion, wherein the workpiece workpiece placement section, a workpiece workpiece mounting table on which the workpiece is placed,
A support portion for movably supporting the material work table in the spindle axis direction and biasing the material work table to the chuck side of the spindle axis; and an outer diameter of the material work on an upper surface of the material work table. One or a plurality of steps having an inner diameter corresponding to the above-mentioned step are formed, and the steps are used to position and hold the material work at a substantially central position of the material work placing table to perform centering.

[0010] The material work placing table includes a support plate supported by being urged toward the chuck side of the spindle axis by a spring member of the support portion, and a support plate mounted on the support plate. A centering jig which is detachably attached and has a plurality of the steps each having a different inner diameter dimension corresponding to the outer diameter dimension of the material work on at least one of a front surface and a rear surface; The centering is preferably performed by detachably mounting the workpiece.

The position of the work table can be adjusted in the radial direction in accordance with the outer diameter of the material work or the processed work, and a plurality of the material work or the processed work are stacked. It is preferable that a plurality of support rods that can be supported are arranged in at least one of the material work mounting portion and the processed work mounting portion in the axial direction of the spindle.

According to a preferred embodiment of the present invention, there is provided a work placing apparatus in which a headstock rotatably supporting a spindle having an axis in a vertical direction or a direction inclined at a predetermined angle with respect to the vertical plane moves at least in the spindle axis direction. A material work placement provided on a spindle moving type vertical machine tool that detachably grips a work with a chuck provided at a front end of the spindle, wherein a plurality of material works are stacked and placed so as to face the chuck. A workpiece placement device having a portion, wherein the workpiece support is configured to support the workpiece support on which the workpiece is placed, and the workpiece support to be movable in the spindle axis direction. A support portion that urges the chuck shaft side of the spindle axis, and a position adjustable in a radial direction of the material work placing table corresponding to an outer diameter of the material work; Wherein and the raw workpiece and a said material workpiece table of a plurality of possible support in a state of stacked support rod.

The support bar is provided so as to be movable in the main shaft axis direction with respect to the work table, and when the work is gripped by the chuck, it is moved to a predetermined position in conjunction with a gripping operation. preferable.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In the following embodiment, a vertical lathe is shown as a spindle moving type vertical machine tool, but a headstock that rotatably supports a spindle provided vertically is moved at least in a spindle axis direction. Therefore, if the machine tool is of the type that directly grips the work detachably with the chuck provided at the front end of the spindle,
Other types of machine tools such as turning centers and grinders may be used. Further, the axis of the main shaft of the vertical machine tool may be perpendicular to the floor surface or may be inclined at a predetermined angle with respect to the vertical surface.

(First Embodiment) FIGS. 1 to 4 show a first embodiment of the present invention. FIGS. 1 and 2 are a plan view and a front view, respectively, of a main spindle moving type lathe, and FIGS. FIG. 4 is a plan view of the work placing device, and FIG. 4 is a sectional view taken along line IV-IV in FIG. As shown in FIGS. 1 and 2, a main spindle moving type lathe (hereinafter referred to as a lathe) 1 includes a machine body 2 and a machine body 2.
And the spindle 5 moves together with the headstock 4 from the processing position to the work mounting device 3, and directly grips the workpiece 7 with the chuck 6 in a detachable manner. After the processing, the grip of the processed work 8 is released. The work mounting device 3 has a material work mounting portion 29 on which the material work 7 is mounted so as to face the chuck 6, and a processed work mounting portion 30 on which the processed work 8 is mounted. ing.

On the upper surface of the bed 10 of the lathe 1, two guide rails 11 are attached in parallel in the X-axis direction which is a direction orthogonal to the axis of the main shaft 5. A saddle 12 is disposed on the two guide rails 11 via a slide body (not shown) so as to be movable in the X-axis direction. The guide rail 11 and a slide main body (not shown) constitute a linear rolling guide. A bracket 10a is fixed to the work placement device 3 side of the bed 10 with bolts (not shown), and the guide rails 11, 11 are supported by the bed 10 and the bracket 10a.

The bracket 10a may be formed integrally with the bed 10. Also, the guide rail 11 may be divided into a rail on the bed 10 side and a rail on the bracket 10a side, and may be one guide rail at the time of assembly adjustment. If the guide rail and the bracket are divided in such a manner so that they can be attached later, it is possible to change a normal vertical lathe to a spindle moving vertical lathe.

An X-axis ball screw 13 is disposed substantially at an intermediate position between the two guide rails 11 in parallel with the guide rail 11, and a nut 14 fixed to the saddle 12 is attached to the X-axis ball screw 13. Screwed. Both ends of the X-axis ball screw 13 are provided with bearing devices 15 and 1 having a built-in bearing.
The X-axis ball screw 13 is rotatably supported by an X-axis servomotor 20 via toothed pulleys 17 and 18 and a toothed belt 19. Since the X-axis ball screw 13 is screwed into the nut 14 fixed to the saddle 12, when the X-axis ball screw 13 rotates, the saddle 12
, And reciprocate in the X-axis direction, and this moving operation is feed of the turret 21 to the tool 22 in the X-axis direction.

Since the X-axis guide rail 11 and the X-axis ball screw 13 are provided so as to extend to the position on the work placement device 3 side, the moving distance of the saddle 12 in the X-axis direction is limited. It is longer in the direction. Therefore, the spindle 5 can be moved between the processing position and the work placement device 3, and supply of the workpiece 7 to the spindle 5 and discharge of the processed workpiece 8 are performed at the lower end of the spindle 5 (ie, the spindle 5). 5 (front end of 5).

A tool rest 23 is attached to the bed 10.
A turret 21 is provided on the tool rest 23 so as to be able to rotate and index around an axis parallel to the X axis. A plurality of tools 22 are radially mounted on the turret 21. On the front surface of the saddle 12, two Z-axis guide rails 24 are provided in parallel in the Z-axis direction, which is a direction parallel to the axis of the spindle 5, and the headstock 4
Are movably engaged with the Z-axis guide rail 24 via the slide bodies 25, 25 in the Z-axis direction. The Z-axis guide rail 24 and the slide main body 25 constitute a linear rolling guide.

A Z-axis servo motor 26 is mounted on the upper portion of the saddle 12, and a Z-axis ball screw (not shown) is directly connected to the Z-axis servo motor 26 and is rotationally driven. It has become. Since a nut (not shown) fixed to the headstock 4 is screwed into the Z-axis ball screw, if the Z-axis ball screw is rotated by the Z-axis servo motor 26, the Z-axis ball screw is rotated. The headstock 4 is guided by the Z-axis guide rail 24 via the nut screwed into the screw, and moves up and down in the Z-axis direction.

A spindle 5 is rotatably supported by the headstock 4, and the spindle 5 rotates while a workpiece is gripped by a chuck 6 provided at the tip thereof. The spindle 5 is a headstock 4
It is rotationally driven by a built-in motor (not shown) built in the inside of the. The chuck 6 is provided with a plurality of (for example, three) claws 27 for gripping the works 7 and 8. A chuck cylinder 28 is provided above the main shaft 5, and the chuck cylinder 28 is driven to
Are moved, the workpieces 7, 8 are gripped or released.

Next, the operation of the lathe 1 will be described. When cutting the workpiece 7 in accordance with a command from the NC device of the lathe 1, the X-axis servomotor 20 is driven to move the saddle 12 toward the workpiece mounting device 3 in the X-axis direction. By the movement of the saddle 12, the main shaft 5 moves to the material work mounting portion 29 of the work mounting device 3. By driving the Z-axis servo motor 26, the spindle 5 is moved downward together with the headstock 4 and the chuck cylinder 28 is driven to move the chuck 6
Grips the workpiece 7. After this gripping operation, the headstock 4 moves up to a predetermined position.

Next, the saddle 12 is rotated by driving the X-axis servo motor 20 to rotate the X-axis guide rail 11.
By moving the upper side to the machining position side in the X-axis direction and driving the Z-axis servo motor 26, the headstock 4 is guided by the Z-axis guide rail 24 and moves in the Z-axis direction. Thus,
The spindle 5 is moved to the machining position, the turret 21 is turned and the desired tool 22 attached to the turret 21 is rotated.
Find out. Then, while controlling the X-axis servomotor 20 and the Z-axis servomotor 26, the number of revolutions of the main shaft 5 is controlled, and the work is cut by the tool 22.

After the work is completed, the X-axis servomotor 20 and the Z-axis servomotor 26 are driven to move the headstock 4 from the processing position to the processed work mounting portion 30 in the same manner as described above. Then, the processed work 8 is detached from the chuck 6 and mounted on the processed work mounting portion 30. Next, the headstock 4 moves to the material work mounting portion 29 and performs an operation of gripping the material work 7 in the same manner as described above.

Next, the work placement device 3 will be described. As shown in FIG. 1, the base 41 of the work placing device 3
Are fixed to the bracket 10a of the lathe 1 by fastening members such as a plurality of bolts 40. The base 41 has a plate shape disposed in a direction (for example, a horizontal direction) orthogonal to the Z-axis direction. The work placement device 3 is mounted on the bracket 1
Although the case where it is attached to 0a is shown, it may be attached to the bed side surface 10b, or it may be installed on the floor surface to be self-standing. On the base 41, a material work mounting part 29 and a processed work mounting part 30 are provided.
Center O ₂ of the center position O ₁ and the machined work mounting portion 30 of the 9
Are arranged side by side on the X-axis.

As shown in FIGS. 3 and 4, one or both of the material work mounting portion 29 and the processed work mounting portion 30 have the material work 7 or the processed work 8 mounted thereon. And a support portion for supporting the work table. This support portion supports the work table so as to be movable in the direction of the axis C of the main shaft 5 (FIG. 2) with respect to the base 41 of the work mounting device 3 and at the same time, in the upward direction of the main shaft axis C (ie, the chuck 6). Side direction). In the present embodiment, the support portions 42 and 43 are provided on the material work mounting portion 29 and the processed work mounting portion 30, respectively. However, even when the support portion is provided only on one of the mounting portions. Good.

The material work placing section 29 includes a material work placing table 44 on which the material work 7 is placed on the upper surface, and a support section 42 for supporting the material work placing table 44. The support part 42 supports the material work table 44 in the direction of the spindle axis C so as to be movable with respect to the base 41, and the material work table 44 is moved upward in the direction of the spindle axis C by a compression spring 45 as a spring member. It is energizing. A plurality of (for example, three) compression springs 45 are formed by the base 41 and the workpiece support 4.
4 and a material work table 44
Are arranged evenly in the circumferential direction. The compression spring 45
May be arranged at the center of the material work table 44 as shown in FIG.

A bar-shaped regulating member 48 protruding downward is fixed to the workpiece support 44. Regulating member 48
Is fitted in a through hole 49 formed in the base 41 so as to be movable in the axial direction, and regulates the material work table 44 in a non-rotating state. A guide member 50, which is screwed and fixed to the base 41 and faces upward, supports the workpiece support 44 so as to be movable in the main axis C direction. 4 shows a state in which the material workpiece 7 and the material workpiece holder 44 have been moved downward by the push rod 63. In a state where the headstock 4 is not receiving the workpiece 7, the contact portion 53 of the workpiece holder 44 contacts the stopper 52 of the guide member 50.
It is waiting for the headstock 4 to receive the workpiece 7.

On the other hand, the processed work mounting section 30 is provided with a processed work table 46 on which the processed work 8 is mounted.
And a support portion 43 for supporting the processed work table 46. The support part 43 supports the processed work placing table 46 movably in the direction of the main axis C with respect to the base 41, and also holds the processed work table 46 above the main axis axis C by a compression spring 47 as a spring member. Biased in the direction.

A plurality (for example, three) of compression springs 47
It is disposed between the base 41 and the processed work placing table 46, and is evenly arranged in the circumferential direction of the processed work placing table 46 to support the processed work placing table 46. Note that one compression spring 47 may be arranged at the center of the processed work table 46 as shown in FIG. The processed work table 46 is also supported by the regulating member 48 and the guide member 50 having the same functions as described above in a non-rotating state and movably in the main axis C direction. The processed work table 46 is provided with the stopper 5 of the guide member 50.
In a state where the contact portion 54 is in contact with the workpiece 2, it is waiting for the processed work 8 to be delivered from the chuck 7 (indicated by a solid line in FIG. 4).

The material work table 44 and the machined work table 46 move the compression spring 4
5, 47 can be moved in the direction of the spindle axis C against the spring force. When the chuck 6 grips the workpiece 7 in the workpiece mounting section 29, the stroke of the headstock 4 in the Z-axis direction of the NC program is programmed to be slightly larger, and the push rod 63 of the chuck 6 is moved to the workpiece 6. 7 is pressed downward to compress the compression spring 45. That is, when the spindle 5 moves in the downward direction of the spindle axis C and the workpiece 7 comes into contact with the claws 27 of the chuck 6, the workpiece support 44 together with the workpiece 7 is compressed by the movement of the spindle 5. It descends against the spring force of the spring 45 (the state of FIG. 4). In this state, the claws 27 of the chuck 6 are closed to hold the workpiece 7.

Thus, even if the dimension h of the workpiece 7 in the direction of the spindle axis C is slightly varied, the workpiece 7
Is always in contact with the end surface 51 of the chuck pawl 27, so that positioning in the direction of the spindle axis C can be performed. Can be done with precision. That is, the error of the dimension h of the material work 7 and the like are absorbed by the compression spring 45. Further, since the chuck pawl 27 and the workpiece 7 abut against each other against the spring force of the compression spring 45, the end face 51 and the workpiece 7 can be gripped in an abutting state, and the spindle 5 side Does not overload the vehicle.

On the other hand, when the machined work 8 is detached from the chuck 6 and is mounted on the machined work table 46 by the machined work mounting section 30, the NC program of the headstock 4 in the Z-axis direction is used. The moving stroke is set to be slightly larger so that the processed work 8 is placed in a state where the compression spring 47 is compressed (the state shown by the two-dot chain line in FIG. 4). That is, in a state where the compression spring 47 is compressed, the chuck jaws 27 are opened to release the gripping of the processed work 8, and then the main shaft 5 is raised. As described above, at the time of the gripping release operation of the processed work 8, the processed work 8 and the processed work table 46 abut against the spring force of the compression spring 47, and the processed work 8
Are released from the chuck 6 while being pressed against the processed work table 46 against the spring force, and are smoothly placed on the processed work table 46. Therefore,
Since the gripped work can be reliably released by preventing the processed work 8 from dropping or excessively pushing during the gripping release operation, the processed work 8 can be prevented from being damaged, and the spindle 5 can be prevented from being damaged.
There is no excessive load on the side.

Next, the swinging means 55 will be described. The material work mounting portion 29 has a swinging means 55 attached to the base 41. A plurality (for example, three) of the oscillating means 55 are arranged radially around the workpiece support 44 and at equal positions in the circumferential direction. The swing means 55
The outer peripheral surface 57 of the material work 7 on the material work table 44 is pressed by the contact member 56 that swings in conjunction with the downward movement of the material work table 44, and the material work 7 is placed on the material work table 44. positioning substantially at the center position O ₁ of the.

The support member 58 is fixed to the upper surface of the base 41, the swing member 59 is swingably supported around the swing center O ₃ on the supporting member 58 via a support shaft 59a . The contact member 56 is provided at the upper protruding portion 5 of the swinging member 59.
9b and is attached by screwing, and swings with the swing member 59. The contact member 56 can be advanced and retracted by adjusting the screw according to the outer diameter of the workpiece 7 so that the position of the distal end portion 60 can be adjusted.

The one side (i.e., the center position O ₁ direction) 59c of the swing member 59 with respect to the swing center O ₃ is by a compression spring 61 as a spring member, upward (i.e., the lower surface of the material workpiece table 44 Material work table 4
4 can be contacted. The other side of the swing member 59 with respect to the swing center O ₃ (i.e., radially outward side of the center position O ₁₎ 59d is made possible contact with the stopper 62 attached to the base 41, the watch of FIG. 4 The swing position in the circumferential direction is regulated. When the workpiece support 44 is in the upper position, the swing member 59 and the abutment member 56 are positioned outside the workpiece support 44 in the radial direction with the other side 59d of the swing member 59 abutting against the stopper 62. It is located diagonally toward.

A push rod 63 is provided at the center of the chuck 6 for abutting on the workpiece 7 when the spindle 5 is lowered and pressing it downward. The push bar 63 projects from the chuck 6 in a state where it is urged downward (that is, toward the workpiece work table 44 side) by a compression spring 63a as a spring member, and is provided so as to be movable in the main shaft axis C direction. When the workpiece 6 on the workpiece support 44 is gripped by the chuck 6, the spindle 5 descends in the direction of the spindle axis C, and the push rod 63 moves the workpiece 7 downward (ie, toward the workpiece support 44 side). By the pressing operation, the workpiece support 44 is lowered from the upper position against the spring force of the compression spring 45 of the support portion 42.

In conjunction with this lowering operation of the workpiece holder 44, the one side 59c of the swing member 59 is pushed downward against the spring force of the compression spring 61. 56 swings counterclockwise. As a result, the distal end portion 60 of the contact member 56 presses the material work outer peripheral surface 57 of the misaligned portion in the direction of the center position O ₁ , and the material work 7 is moved substantially to the center position of the material work placing table 44. Positioned at O ₁ . After the material work 7 is positioned in this manner, the material work 7 is gripped by the claws 27 of the chuck 6, and then the headstock 4 rises and moves to the processing position.

Since the workpiece 7 has not been machined yet, its outer diameter dimension and axial dimension h are quite rough and vary, and the workpiece 7 placed on the workpiece holder 44 by the operator is positioned at the center position O _1. When the chuck 6 grips the workpiece 7, the workpiece 7 on the workpiece holder 44 is automatically moved by the swinging means 55 which swings in conjunction with the downward movement of the spindle. Centering is done. As a result, even if the operator appropriately places the workpiece 7 on the workpiece holder 44 without paying much attention, the automatically centered workpiece 7 is chucked by the chuck 6.
Thus, the workability when supplying the workpiece 7 onto the workpiece support 44 is improved.

(Second Embodiment) FIG. 5 is a front sectional view showing a part of a work mounting device 3a according to a second embodiment of the present invention, and receives a workpiece 7 by a chuck (not shown). Therefore, the material work mounting portion 29a is in a state of being lowered by being pressed by the chuck or a member provided on the chuck. The work mounting device 3
The description of the same or corresponding parts is omitted, and only different parts will be described.

As shown in FIG. 5, the work placing device 3a
Are the workpiece mounting portion 29a and the processed workpiece mounting portion 30
(FIGS. 3 and 4), and the material workpiece mounting portion 29a
A material work table 44a on which the material work 7 is placed;
And a supporting portion 42a for supporting the material work placing table 44a. The support part 42a supports the workpiece support 44a movably in the direction of the spindle axis C with respect to the base 41 of the workpiece placement device 3a and urges the workpiece workpiece stand 44a in the upward direction of the spindle axis C.

One or more steps having an inner diameter corresponding to the outer diameter of the workpiece 7 are formed on at least the upper surface of the workpiece holder 44a. centering and positioning held substantially center position O ₁ of 44a. The material work table 44a of the present embodiment includes a support plate 64 supported by being urged upward (that is, toward the chuck side) by the compression spring 45a, which is a spring member of the support portion 42a, in the upward direction of the spindle axis C. And a centering jig 69 detachably mounted on the plate 64.

At the center of the support plate 64, a positioning member 73 for positioning the center position is fixed by a screw member (not shown) or the like. A center hole 74 is formed at the center position of the centering jig 69, and the center hole 74 can be engaged with and disengaged from the positioning member 73. By engaging the positioning member 73 with the center hole 74 of the centering jig 69, the centering jig 69 is positioned concentrically with the guide member 50a via the positioning member 73 and the support plate 64. Note that the positioning member 73 may be formed integrally with the guide member 50a.

On one or both (preferably both) of the front surface 65 and the back surface 66 of the centering jig 69, a plurality of steps 67, 68 having different inner diameters corresponding to the outer diameter of the workpiece 7 are provided. Is formed. Step 6 of centering jig 69
The material work 7 is centered by removably mounting the material work 7 on 7 or 68.

The guide member 50a is attached to the base 41 by the main shaft axis C.
It is screwed and fixed in the direction. A hollow cylindrical portion 70 provided on the lower surface side of the support plate 64 is fitted to the guide member 50a movably in the axial direction. A regulating member 71 for regulating the hollow cylindrical portion 70 in a non-rotating state is attached to a lower portion of the hollow cylindrical portion 70, and the regulating member 71 is movably in an axial direction in a through hole 72 formed in the base 41. Mated. The support plate 64 and the hollow cylindrical portion 70 are supported by the base 41 while being urged upward via a compression spring 45a disposed outside the hollow cylindrical portion 70. Since the support portion 42a is configured as described above, the same operational effects as those of the support portion 42 of the first embodiment can be obtained.

FIG. 5 shows a state in which the material work table 44a is lowered by a predetermined amount due to the pressing of the claw 27 in order to transfer the material work 7 and the like. The workpiece support 44a is provided with a contact portion 64a of the support plate 64 on the stopper portion 50b of the guide member 50a.
Has risen to the position where it abuts.

As described above, the front surface 65 and the back surface 66 of the centering jig 69 have inner diameters different from each other (for example, 10
Since the step portions 67 and 68 (for each mm) are formed, the material work 7 can be placed by selecting the placement portion of the step portions 67 and 68 according to the diameter of the material work 7. If there is no mounting portion having an appropriate inner diameter corresponding to the workpiece 7 on one surface, the centering jig 69 is turned over, and a mounting portion having an appropriate inner diameter of the step portion on the other surface is placed. You just have to select

In the present embodiment, the surface 6 of the centering jig 69
By properly using the back surface 5 and the back surface 66, the application range in which the workpiece 7 can be centered and placed with one centering jig 69 without increasing the thickness of the workpiece support 44a in the central axis direction is increased. Can be enlarged. As a result, the operator can easily and quickly center the material work 7 without paying much attention, can reduce the work time for centering, and the configuration of the work mounting device 3a is extremely simple.

(Third Embodiment) FIGS. 6 to 9 show a third embodiment of the present invention. FIG. 6 is a schematic front view of a work placing device, and FIG. 7 is a concrete work placing device. Plan view of the device,
8 is a sectional view taken along line VIII-VIII in FIG. 7, and FIG.
It is a line expanded sectional view. In the first and second embodiments,
It is preferable that the workpieces are placed one by one on the material workpiece mounting part and the processed workpiece mounting part, respectively. However, in the workpiece mounting apparatus of the third embodiment, a plurality of material workpieces are opposed to the chuck. Alternatively, a stacked work in which the processed workpieces are stacked and placed on the material workpiece mounting portion or the processed workpiece mounting portion is possible.

For example, as shown in FIG. 6, the work placement device 3b can adjust the position of the work placement tables 44 and 46 in the radial direction according to the outer diameter of the material work 7 or the processed work 8. A plurality of support rods 80 are provided. The support rod 80 is disposed in the direction of the spindle axis C, and is provided on one or both (preferably both) of the material workpiece mounting portion and the processed workpiece mounting portion. The support rod 80
It is provided so as to be movable in the direction of the spindle axis C with respect to the work placing tables 44 and 46, and when the chucks 6 grip the workpieces 7 and 8, they move to a predetermined position in conjunction with the gripping operation. By providing the support rod 80, the plurality of material workpieces 7 or the processed workpieces 8 can be placed on the workpiece table 44.
Or, it can be supported in a stacked state stacked on 46.

In order to prevent the support rod 80 from interfering with the chuck 6 and the claw 27 when the main shaft 5 is brought close to the work mounting device 3b, a plurality of pressing members 81 are provided so as to correspond to each support rod 80. 6. The support rod 80 can be moved downward by the pressing member 81 against the spring force of the spring member 82. In this way, the workpiece 6 or the processed workpiece 8 can be transferred to the workpiece mounting device 3b by the chuck 6 without being disturbed by the support rod 80.

Next, a specific work placement device 3c having a work placement portion will be described with reference to FIGS. Note that the same or corresponding parts as in the above embodiments are denoted by the same reference numerals, and description thereof will be omitted. Work placement device 3c
The workpiece 7 or the processed workpiece 8 is placed on a workpiece holder 83 (for example, a workpiece workpiece mounting table or a processed workpiece mounting table) 83. As shown in FIGS. 7 to 9, the work table 83 is supported by the work mounting device 3 by the support portion 42a.
c is supported so as to be movable in the direction of the spindle axis C with respect to the base 41, and is urged in the upward direction of the spindle axis C (ie, toward the chuck).

The support plate 64 of the work table 83 is provided with the hollow cylindrical portion 70 of the support portion 42a. Support plate 6
4 is supported in a state of being urged upward by a compression spring 45a. That is, FIG. 8 illustrates a state in which the work table 83 is lowered by a predetermined amount due to the pressing of the claw 27 in order to transfer the material work 7 and the like. The table 83 is provided with a guide member 50a.
Has risen to a position where the contact portion 64a of the support plate 64 contacts the stopper portion 50b. A circular guide plate 84 is fixed to an upper surface of the support plate 64 by a plurality of screw members 93. A plurality of (for example, three) guide grooves 85 are radially formed in the guide plate 84, and the three guide grooves 85 are uniformly arranged at the same angular pitch. A positioning member 86 is fixed to the center of the guide plate 84, and the positioning member 86
Accordingly, the guide plate 84 and the support plate 64 are positioned concentrically.

On the upper surface of the guide plate 84, a circular rotary plate 87 is provided.
Are rotatably arranged in a state where they are concentrically positioned by the positioning member 86. On the outer periphery of the rotating plate 87,
An operation member 88 for an operator to manually operate is attached. A plurality of (for example, three) arc-shaped long holes 89 are formed through the rotating plate 87 at the same angular pitch, and the three long holes 89 extend from near the center of the rotating plate 87 to near the outer periphery. So that it extends.

The guide groove 85 has a shape in which an upper guide surface 90a, a lower guide surface 90b, and side guide surfaces 90c, 90c are formed. In the guide groove 85, a moving member 91 is guided by each of the guide surfaces 90a, 90b, 90c.
The moving member 91 is reciprocally movable in the radial direction of the guide plate 84 in a state where the moving member 91 is regulated so as not to get out of the guide groove 85. The upper part 92 of the moving member 91 is
9 are fitted relatively movably. The elevating member 80a to which the support rod 80 is attached is urged upward by a spring member 82 disposed in a lower portion 92a of the moving member 91 so that the elevating member 80a can move vertically with respect to the moving member 91. Has become.

A spring receiving member 91a is fixed to a lower portion of the lower portion 92a of the moving member 91, and presses the spring member 82. That is, when the support rod 80 is not pressed by the pressing member 81 or the like, the collar portion 80c of the elevating member 80a
Abuts on the moving member 91 and stops. Lifting member 80
a has a small diameter portion 80b extending downward from the collar portion 80c, and the small diameter portion 80b is located in the lower portion 92a and penetrates the spring receiving member 91a. The support plate 64, the guide plate 84, the rotating plate 87, the positioning member 86, and the moving member 91 form a work table 83.

Therefore, when the rotating plate 87 is rotated with respect to the guide plate 84 by holding the operation member 88, all the support rods 80 are moved together with the moving member 91 engaged with both the elongated hole 89 and the guide groove portion 85. Move radially and simultaneously in the radial direction of the work placing table 83. As a result, the support diameter of the support rod 80 can be enlarged or reduced according to the size of the outer diameter of the material work 7 or the processed work 8 supported by the three support rods 80, and the work in a stacked state can be realized. 7 or 8 can be supported.

When the material work 7 and the processed work 8 are sequentially transferred, the pressing member 8 is set in accordance with the stacked state.
1 pushes down the support bar 80 and the elevating member 80a to predetermined positions, so that the claw 27 can grip the workpiece 7 and release the processed work 8 without interference between the claw 27 and the like and the support bar 80. it can. Since the works 7 and 8 can be stacked in this manner, the worker does not need to always be near the lathe, thus improving workability.

In this embodiment, the description has been made with reference to the work placement device in which the workpiece placement portion and the processed work placement portion are arranged. However, the present invention is not limited to this. For example, a known work feeder may be provided with a work table and a support portion for urging the work table. Although the main shaft is driven to rotate by a built-in motor, it may be driven to rotate by a main shaft motor driven via a gear mechanism and a belt / pulley mechanism. The chuck has also been described as a fluid pressure chuck that performs gripping / releasing operation with a chuck cylinder, but other chucks such as an electric chuck that grips and releases gripping claws by driving a scroll chuck or the like with a drive motor. There may be.

As described above, according to the present invention, the operator places the workpiece 7 on the work placement device and removes the processed work 8 from the work placement device, thereby enabling the robot and the loader to be mounted. The lathe 1 can continuously process a work without providing a work transfer device or the like. In addition,
The same reference numerals in the drawings indicate the same or corresponding parts.

[0062]

According to the present invention, since the support portion for urging the work table to the chuck side of the spindle axis is provided, when the work piece on the work table is received by the spindle chuck, a large load is applied to the spindle side. The workpiece can be securely gripped by the spindle chuck without hanging, and when the machined workpiece is transferred from the spindle side chuck to the workpiece mounting part, the workpiece is loaded without being damaged by dropping etc. It can be placed smoothly on the part. Also,
According to another aspect of the present invention, the swinging means is provided or a step is formed on the upper surface of the material work placing table so that the material work can be centered. Even if the workpiece is placed on the workpiece mounting section, the workpiece can be reliably gripped by the chuck.

[Brief description of the drawings]

FIG. 1 to FIG. 4 are views showing a first embodiment of the present invention, and FIG. 1 is a plan view of a main spindle moving type lathe.

FIG. 2 is a front view of the spindle moving type vertical lathe.

FIG. 3 is a plan view of the work placement device.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a front sectional view showing a part of a work placing device according to a second embodiment of the present invention.

6 to 9 are views showing a third embodiment of the present invention, and FIG. 6 is a schematic front view of a work mounting device.

FIG. 7 is a plan view of a specific work placing device.

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is an enlarged sectional view taken along line IX-IX of FIG. 8;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Spindle moving type vertical lathe (spindle moving type vertical machine tool) 3, 3a, 3b, 3c Work mounting device 4 Spindlehead 5 Spindle 6 Chuck 7 Material work (work) 8 Processed work (work) 29, 29a Material Work placement part (placement part) 30 Processed work placement part (placement part) 42, 42a, 43 Support part 44, 44a Material work placement base (work placement base) 45, 45a Compression spring (spring member) 46 Processed work placing table (work placing table) 55 Swing means 56 Contact member 57 Outer peripheral surface of material work 63 Push rod 64 Support plate 65 Surface 66 Back surface 67, 68 Step 69 69 Centering jig 80 Support rod 83 Material work Placement table (work table) C spindle axis O ₁ The center position of the material work table

Claims (8)

[Claims] 1. A chuck provided at a front end of the spindle by moving at least a spindle head rotatably supporting a spindle having an axis in a vertical direction or a direction inclined at a predetermined angle with respect to the vertical plane in the spindle axis direction. A workpiece-mounting section on which a workpiece is placed so as to face the chuck and a workpiece that is placed on a spindle-moving vertical machine tool that detachably grips the workpiece with the workpiece. A work placement device having a placement part, wherein at least one of the material work placement part and the processed work placement part is placed with the material work or the processed work. A spindle moving type vertical work comprising: a work placing table; and a support portion that supports the work placing table so as to be movable in the spindle axis direction and urges the workpiece axis toward the chuck side of the spindle axis. Work placement device in working machine. 2. A chuck provided at the front end of the spindle, wherein a headstock rotatably supporting a spindle having an axis in a vertical direction or a direction inclined at a predetermined angle with respect to the vertical plane is moved at least in the spindle axis direction. A workpiece placement device provided on a spindle moving type vertical machine tool that detachably grips the workpiece with the workpiece, wherein the workpiece is placed so as to face the chuck; A workpiece mounting portion, comprising: a workpiece support on which the workpiece is placed; and a support portion for supporting the workpiece support so as to be movable in the spindle axis direction and for urging the workpiece support on the chuck side of the spindle axis. And pressing the outer peripheral surface of the material work on the material work placing table with a contact member that swings in conjunction with the lowering operation of the material work placing table, thereby moving the material work into the material. Movable main spindle Vertical tool workpiece supporting means in the machine, characterized in that a rocking means for positioning a substantially central position on the placing over click board. 3. A push rod protruding from the chuck is provided in a state where the push rod is biased toward the material work table side of the spindle axis, and the chuck is used to grip the material work on the material work table. By the operation of the main shaft being lowered and the push rod pressing the material work toward the material work pedestal, the material work pedestal is lowered against the spring force of the spring member of the support portion, and In conjunction with the lowering operation of the work table, the plurality of contact members disposed around the material work table swing, thereby being positioned at substantially the center position on the work table. The workpiece placing apparatus according to claim 2, wherein the material workpiece is gripped by the chuck. 4. A chuck provided at a front end of the spindle by moving at least a spindle head rotatably supporting a spindle having an axis in a vertical direction or a direction inclined at a predetermined angle with respect to the vertical plane in the spindle axis direction. A workpiece placement device provided on a spindle moving type vertical machine tool that detachably grips the workpiece with the workpiece, wherein the workpiece is placed so as to face the chuck; A workpiece mounting unit configured to support the workpiece holder on which the workpiece is placed, and a support unit configured to support the workpiece holder so as to be movable in the spindle axis direction and to urge the workpiece axis toward the chuck side of the spindle axis; And forming one or more steps having an inner diameter corresponding to an outer diameter of the material work on the upper surface of the material work placing table, and using the steps to move the material work to the material. Over click stand workpiece supporting means in movable main spindle vertical machine tool, characterized in that the centering and positioning held substantially central position of the. 5. A support plate supported by being urged toward the chuck side of the spindle axis by a spring member of the support portion, the workpiece support being detachably mounted on the support plate, and having a surface mounted thereon. And a centering jig on which at least one of the back surfaces is formed with a plurality of the steps having different inner diameters corresponding to the outer diameters of the material work, wherein the material work is detachably attached to the steps. The work placement device in a spindle moving vertical machine tool according to claim 4, wherein the centering is performed by mounting. 6. A state in which a position of the work placing table can be adjusted in a radial direction corresponding to an outer diameter of the material work or the processed work, and a plurality of the material work or the processed work are stacked. 2. The spindle movable type upright according to claim 1, wherein a plurality of support rods that can be supported are arranged on at least one of the material workpiece mounting portion and the processed workpiece mounting portion in the axial direction of the spindle. 3. A work placement device for machine tools. 7. A chuck provided at a front end of the spindle by moving at least a spindle head rotatably supporting a spindle having an axis in a vertical direction or a direction inclined at a predetermined angle with respect to the vertical plane in the spindle axis direction. A work placement device provided on a spindle moving type vertical machine tool for detachably gripping a work, and having a material work placement portion on which a plurality of material works are stacked and placed so as to face the chuck. The material work mounting portion includes: a material work table on which the material work is mounted; and a material work table that movably supports the material work table in the spindle axis direction and is attached to the chuck side of the spindle axis. And a support portion for energizing, the position of the material work placing table can be adjusted in the radial direction in accordance with the outer diameter of the material work, and a plurality of the material works can be placed on the material work placing table. Movable main spindle Vertical tool work mounting apparatus in a machine for a plurality of support rods that can be supported in a stacked, comprising the in. 8. The support bar is provided so as to be movable in the main shaft axis direction with respect to the work table, and moves to a predetermined position in conjunction with a gripping operation when gripping the work with the chuck. The workpiece mounting device according to claim 6 or 7, wherein the workpiece is mounted on a vertical spindle type machine tool.