JP2003080401A - Automatic lathe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic lathe furnished with a spindle stock to move in the Z2 axial direction which is the axial direction of a spindle and in the X2 axial direction orthogonal with the Z2 axial direction and furnished with a product discharge device free to carry out desired product discharging motion without requiring a special driving mechanism and without increasing a necessary stroke in the Z2 direction. SOLUTION: This automatic lathe is devised to extrude and discharge a product stored in a tip part of a back spindle 43 by driving a lever 115 of a product extrusion shaft 101 by a support 125 by moving the back spindle 43 while moving and controlling it in the X2 axial direction and the Z2 axial direction toward a product discharge chute 53 set at a position separated from a working position by a specified distance along the axial direction at the time of discharging the product.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an automatic lathe,
In particular, the present invention relates to a product discharge device that does not require a dedicated drive source and that can perform a desired product discharge operation without increasing the size of the device.

[0002]

2. Description of the Related Art As a product discharging device for an automatic lathe,
For example, Japanese Utility Model Publication No. 3-67001, Japanese Utility Model Publication 7-23
There is one as shown in Japanese Patent No. 122. Each of these has a structure in which a shaft member for pushing out and discharging a product is inserted and arranged in the main shaft, and a dedicated cylinder mechanism for driving the shaft member is provided behind the shaft member. And
By driving the cylinder mechanism, the shaft member is slid toward the front, thereby pushing out and discharging the product accommodated in the tip portion of the main shaft.

However, in the case of this type of product discharge device, a dedicated drive source such as a cylinder mechanism is required to push out and discharge the product, which increases the size of the device and complicates the structure. There was a problem of being lost. Therefore, a product discharging device as shown in FIG. 11 was considered.

FIG. 11 is a diagram showing an extracted structure of a product discharging device in an automatic lathe. First, there is a headstock 501. The headstock 501 is configured to be movable in the Z-axis direction, and is rotatably equipped with a main spindle 503 that holds a workpiece. When the work held by the spindle 503 is discharged as a product, the spindle stock 501 is moved backward in the Z-axis direction (to the left in the case of FIG. 11). As a result, the knockout shaft member 507 and the knockout jig 509 inserted and arranged in the main shaft 503 act on the work to push it out.
In other words, the headstock 50 does not require any dedicated drive source.
A desired product is discharged by using the movement operation of 1 in the Z-axis direction.

A knockout pipe 511 and a quick joint 51 are provided at the rear end of the knockout shaft member 507 in FIG.
3, the air hose 515 is connected. Also, reference numeral 5
Reference numeral 05 is a support member, and reference numeral 517 is a joint plate.

[0006]

The above-mentioned conventional structure has the following problems. First, in the case of the product discharging apparatus shown in FIG. 11, the headstock 501 is merely an automatic lathe of a type in which the headstock 501 moves only in the Z-axis direction. For example, the headstock 501 has an X-axis orthogonal to the Z-axis direction. There is a problem that it cannot be applied as it is to an automatic lathe that can move in any direction. Another problem is that the stroke in the Z-axis direction becomes long, which leads to an increase in the size of the device. That is, also in the normal machining operation, the work is moved by moving the headstock 501 in the Z-axis direction. Such a work feeding operation in the Z-axis direction needs to be performed in a region where the knockout shaft member 507 and the knockout jig 509 do not act on the work, that is, in a Z-axis region different from the Z-axis region for knockout. is there. That is, in the Z-axis direction, a long area including a moving area for performing normal processing and an area for discharging a product is required.

The present invention has been made on the basis of such a point, and an object thereof is also in the Z ₂ axis direction which is the axial center direction of the main shaft and in the X ₂ axis direction orthogonal to the Z ₂ axis direction. A product discharge device that is equipped with a moving headstock and that can perform a desired product discharge operation without requiring a dedicated drive source and without increasing the required stroke in the Z ₂ axis direction. It is to provide an equipped automatic lathe.

[0008]

In order to achieve the above object, an automatic lathe according to claim 1 of the present invention comprises a bed and a spindle for holding a workpiece, which is a product arranged on the bed, which is a product, which is rotatable. Z ₂ axis direction which is the axial center direction and the Z
And headstock movable in the X ₂ axis direction orthogonal to the _two directions,
It is inserted and arranged from the rear in the main shaft, and is normally biased rearward by an elastic member, and is driven forward against the biasing force of the elastic member at the time of product discharge, so that the tip of the main shaft is and product extrusion axis means for extruding a product contained, X ₂ axially towards the headstock when the product discharged from the processing position along the X ₂ axis direction set product discharge position at a position separated by a predetermined distance And driving means for acting on the product extruding shaft means to drive it forward by moving while controlling the movement in the Z ₂ axis direction, thereby extruding and ejecting the product accommodated in the tip portion of the main shaft. And is provided. The automatic lathe according to claim 2 is the automatic lathe according to claim 1, wherein a lever is attached to the headstock side.
The lever is always urged to rotate rearward by an elastic member together with the product pushing shaft means, while a support is fixed at a predetermined product discharging position on the bed side along the X ₂ axis direction. When the product is discharged, the headstock is moved along the X ₂ axis direction from the processing position to a predetermined product discharge position and is moved in the Z ₂ axis direction so that the strut acts on the lever. It is characterized in that the product is pushed forward and the product pushing shaft means is driven forward so that the product housed in the tip of the main shaft is pushed and discharged.
The automatic lathe according to claim 3 is the automatic lathe according to claim 1, wherein a lever is attached to the headstock side, and the lever is normally rotated backward together with the product extrusion shaft means by an elastic member. On the other hand, a pillar is fixed and arranged at a predetermined product discharge position along the X ₂ axis direction on the bed side, and the headstock is moved in the Z ₂ axis direction at the time of product discharge. After that, by moving along the X ₂ axis direction from the processing position to a predetermined product discharge position, the lever acts on the column to rotate the column, and at the same time, to drive the product extrusion shaft unit forward. Thereby, the product accommodated in the tip portion of the main shaft is pushed out and discharged. An automatic lathe according to a fourth aspect is the automatic lathe according to the first aspect, in which a column is attached to the headstock side and a lever is attached to the bed side, and the lever is always attached. Is urged to rotate rearward by an elastic member, and when the product is discharged, the headstock is moved along the X ₂ axis direction from the processing position to a predetermined product discharge position and Z
By moving in _two axial directions, this by the action of the strut to the lever to drive the product extruded shaft means with rotating forward forward, whereby the product contained in the distal portion of the main shaft It is characterized in that it is adapted to extrude and discharge. Further, the automatic lathe according to claim 5 is the automatic lathe according to any one of claims 1 to 4, wherein the product extruding shaft means is disposed in front, and a product discharge shaft is rotated with rotation of a main shaft, It is composed of an intermediate shaft which is arranged rearward and which does not rotate with the rotation of the main shaft, and is normally biased rearward by separate elastic members and a gap is set between the two. To do. Further, the automatic lathe according to claim 6,
The automatic lathe according to any one of claims 1 to 5, wherein the product extruding shaft means is detachably provided with a tip shaft member at the tip thereof, and can be selected and used according to the length and outer diameter of the product. It is characterized by being configured. or,
An automatic lathe according to claim 7 is the automatic lathe according to any one of claims 2 to 6, wherein the support column is provided with a tip sliding member elastically retained, and acts on a lever when a product is discharged. When a load above a certain level is applied, the load can be absorbed by sliding the tip sliding member against the elastic force. or,
An automatic lathe according to claim 8 is the automatic lathe according to any one of claims 1 to 7, characterized in that the headstock is a rear-side headstock that is opposed to and arranged on the front-side headstock. Is.

That is, in the case of the automatic lathe according to the present invention
X is the above headstock._TwoFrom the machining position along the axial direction
Direct to the product discharge position set at a position separated by a fixed distance
Once X_TwoAxial direction and Z_TwoMove while controlling movement in the axial direction
To move. As a result, the drive means becomes the product extrusion shaft means.
Act on it to drive it forward, which causes the tip of the spindle to
It pushes and ejects the product stored at the end.
It In other words, dedicated drive for cylinder mechanism etc. as in the past
Utilizing the movement of the headstock without the need for a separate source
It is intended to perform a desired product discharging operation. Also,
X for the machining position_TwoAxial distance apart
The product discharge position should be set to the
Z_TwoDevice that suppresses expansion of stroke in the axial direction
It is intended to prevent the increase in size. At that time, drive
There are various possible configurations of means, for example,
For example, attach a lever to the headstock side, and the lever is
With the product extruding shaft means, it can be rotated backward by elastic member
On the other hand, on the bed side, X
_TwoFix and place the column at the specified product discharge position along the axial direction.
Place the above-mentioned headstock on the X_TwoAdded along the axial direction
Move from the work position to the specified product discharge position and move to Z
_TwoBy moving the lever in the axial direction,
The product is acted on by rotating the pillar forward
Drive the extrusion shaft means forward, and thereby the tip of the main shaft
It is configured to push out and discharge the product contained in the section
It is possible to do it. Also, attach a lever to the headstock side
The lever always has an elastic part together with the product pushing shaft means.
Is urged to rotate by a member, while the bed is
Side and X_TwoAt the predetermined product discharge position along the axial direction
Fixing and arranging the columns, Z the above headstock at the time of product discharge_Twoaxis
X after moving in the direction_TwoFrom the machining position along the axial direction
By moving it to the specified product discharge position,
When the above-mentioned strut is acted on the
To drive the product extrusion shaft means forward, thereby
Extruding and discharging the product contained in the tip of the spindle
It is conceivable to configure it as follows. Also, a column on the headstock side
On the other hand, attach the lever to the bed side,
The bar is always urged to rotate by the elastic member.
However, when the product is discharged, X_TwoMachining along the axial direction
From the position to the specified product discharge position, and Z _Two
By moving the lever in the axial direction,
And rotate it forward and press the product
Drives the evacuation means forward, which causes the tip of the spindle to
The product contained in the
It is possible that Others, structure of driving means, driving hand
Various configurations are assumed for the relationship between the step and the product extrusion shaft means.
To be done. In addition, the product extruding shaft means is arranged in front of the main shaft.
The product discharge axis that rotates with the rotation and the main
Consisting of an intermediate shaft that does not rotate as the shaft rotates,
Are biased rearward by separate elastic members
Together with that there should be a gap between them
Conceivable. In this case, the intermediate shaft does not rotate, so an example
For example, the intermediate shaft and one end of the lever may come into contact with each other.
In the case of the configuration, due to friction between the intermediate shaft and one end of the lever
Wear can be avoided. Also, the tip of the product extrusion shaft means
If the tip shaft member is detachably attached to the end,
It is possible to select and use the most suitable one according to the sheath outer diameter,
In other words, if only the tip shaft member is replaced appropriately, various lengths can be obtained.
And products with outer diameters can be easily handled. Also, above
With a pillar provided with the tip sliding member elastically held
When the product is ejected, the
If the above load is applied, the tip sliding member will
The load can be absorbed by sliding against it,
Therefore, damage to each part can be prevented. Note that automatic
There are various possible lathe configurations, but
For example, the headstock is a rear-side headstock that is placed facing the front headstock.
It can be considered as a stand.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, referring to FIG. 1 to FIG.
A first embodiment of the invention will be described. First of all,
The overall schematic configuration will be described with reference to FIGS. Well
There is a bed 1 on which a headstock 3 is mounted.
It is listed. This headstock 3 is a work 4 (phantom line in FIG. 1).
(Shown in FIG. 3) is rotatably provided on the main shaft 5.
In the axial direction of the spindle 5 (Z₁Configured to be movable in the axial direction)
Has been done. Z of the above headstock 3 ₁Axial movement is
Z shown in 2₁Axis servo motor 7 and ball screw (not shown)
-A ball nut mechanism is used. That is, FIG.
As shown in FIG.₁Axis guide rail
6 and 6 are laid (only one side is shown in FIG. 2).
On the headstock 3 side, the above Z₁Move to the axis guide rails 6, 6
Z movably engaged₁When the shaft guide members 8 and 8 are attached
(Fig. 2 shows only two on one side, but the opposite
It is also provided on the side). Therefore, Z₁Axis servo motor
When the headstock 3 is driven by₁Axis guide
Member 8,8, Z₁Z through the shaft guide rails 6, 6₁axis
Will move in the direction.

A guide bush 9 is arranged in front of the headstock 3 in the Z ₁ axis direction. The work 4 is gripped by the main shaft 5 and its tip is supported by the guide bush 9.

A first comb tool post 11 and a second comb tool post 13 are arranged opposite to each other on both sides of the guide bush 9 in between. The first comb-type tool rest 11 is configured to be movable in the X ₁ axis direction and the Y ₁ axis direction which are orthogonal to the Z ₁ axis direction and mutually orthogonal. That, X ₁ by ball screw-ball nut mechanism first comb tool rest 11 is not shown as X ₁ axis servo motor 15 and the X ₁ axis guide mechanism
Moves in the axial direction, and is configured to move in Y ₁ axially by the ball screw-ball nut mechanism not shown as Y ₁ axis servo motor 17 and Y ₁ axis guide mechanism.

As shown in FIG. 3, four cutting tools 21 and three rotary tools 23 are attached to the first comb-shaped tool rest 11 in a comb-tooth shape. Set the first comb tool post 11 to Y _1.
By appropriately controlling the movement in the axial direction, an arbitrary tool is selected from the above-mentioned four cutting tools 21 to be positioned at a position corresponding to the axial center position of the main spindle 5, and three rotary tools 23 are machined. Is located at the designated position.
Incidentally, in the case shown in FIG. 3, none of the tools on the side of the first comb-shaped tool rest 11 is selected.

On the other hand, on the side of the second comb-type tool rest 13,
₁Z parallel to the axial direction_ThreeIt can move in the axial direction,
This Z_ThreeX orthogonal to the axial direction and orthogonal to each other_Threeaxis
Direction and Y_ThreeIt is configured to be movable in the axial direction. Sanawa
The second comb tool post 11 is Z _ThreeAxis servo motor 25 and figure
Ball screw / ball nut mechanism and Z not shown_ThreeAxis guy
Z by the mechanism_ThreeMove in the axial direction. Z above_ThreeAxis guy
Although it is a drive mechanism, as shown in FIG. 3, first, the bed 1 side
A pair of Z_ThreeThe shaft guide rails 26, 26 are laid
It On the other hand, Z is on the side of the second comb type tool post 11._ThreeAxis guide member
28, 28 are provided, and the pair of Z_ThreeAxis guide
It is movably engaged with the rails 26, 26. And
Z_ThreeBy driving the axis servo motor 25, the second comb
The tool post 13 is the above Z_ThreeShaft guide members 28, 28 and
The pair of Z_ThreeZ through the shaft guide rails 26, 26_Three
It moves in the axial direction. Also, X_ThreeAxis servo motor
27 and a ball screw / ball nut mechanism (not shown) and X
_ThreeX by the axis guide mechanism _ThreeMoves in the axial direction, and Y_Three
Axis servomotor 29 and ball screw / ballener not shown
Mechanism and Y_ThreeY by the axis guide mechanism_ThreeMove axially
Configured to move.

As shown in FIG. 3, the second comb-type tool rest 13 has two cutting tools 31, three rotary tools 33, and
Four boring tools 35 are attached in a comb shape. By appropriately controlling the movement of the second comb-type tool rest 13 in the Y ₃ axis direction, an arbitrary tool is selected from the two cutting tools 31, the three rotary tools 33, and the four boring tools 35. The main shaft 5 is positioned at a position corresponding to the axial center position of the main shaft 5. Incidentally, in the case shown in FIG. 3, the cutting tool 31 at the lowermost position is selected and is positioned at the axial center position of the spindle 5.

On the bed 1 and with the headstock 3
A rear headstock 41 is arranged on the opposite side. This spine
The surface headstock 41 includes a rear surface spindle 43 rotatably.
Further, the rear headstock 41 is Z in the axial direction of the main spindle 5.₁Axial direction
Z parallel to the direction_TwoIt is movable in the axial direction, and the Z_Two
X orthogonal to the axial direction_TwoIt is configured to be movable in the axial direction
It That is, the back headstock 41 is Z_TwoAxis servo motor 4
5 and a ball screw / ball nut mechanism (not shown) and Z_Two
Z by axis guide mechanism_TwoMove in the axial direction. Also, X_Two
Axis servo motor 47 and ball screw / ballener not shown
Mechanism and X _TwoX by the axis guide mechanism_TwoMove axially
It moves.

X above_TwoA little explanation about the movement in the axial direction
To replenish X, as shown in FIG._TwoAxis table 48
There is this X_TwoX on the lower surface of the shaft table 48_TwoAxis moth
The id members 50, 50 are attached. On the other hand,
A pair of X on the side of_TwoAxial guide rails 52, 52 are laid
Has been done. And, as mentioned above, X_TwoAxis servo mode
By driving the motor 47,
Through the X _TwoAxis table 48 is X_TwoAxis guy
Member 50, 50, X_TwoVia shaft guide rails 52, 52
And then X_TwoIt will move in the axial direction. The headstock 3
Between the rear headstock 41 and the rear headstock 41, four rear surface processing tools 5
1 is attached and the back surface processing tool 51
A product discharge chute 53 is installed in the vicinity of.
The product discharge chute 53 is X_TwoAdded along the axial direction
At a predetermined product discharge position, which is separated from the work position by a predetermined distance
It is located at the corresponding position.

The above is the schematic configuration of the entire automatic lathe. In such an automatic lathe, for example, the following series of processing is performed. First, the work 4 is attached to the spindle 5 of the headstock 3.
The guide bush 9
Support by. In this state, so-called "front side processing" is performed by the various tools of the first comb tool post 11 and / or the various tools of the second comb tool post 13.

The work 4 which has been machined on the front side is transferred from the spindle 5 side of the spindle stock 3 to the rear spindle 43 side of the rear spindle stock 41. That is, the front end of the work 4 that has been processed on the front side is gripped by the back spindle 43, and the cut-off process is performed in that state.
As a result, the predetermined part of the work 4 is moved to the rear spindle 43 side. Next, the so-called "back surface side processing" using the back surface processing tool 51 or the like is performed on the work 4 that has been transferred to the rear surface spindle 43 side and gripped. Work 4 that has undergone the prescribed "back surface processing" is product 4
Is discharged onto the product discharging chute 53 at a predetermined product discharging position. For convenience of description, the product will be described with the same reference numeral 4 as the work.

Next, the structure of the product discharging device for discharging the product 4 which has been subjected to the predetermined back surface processing on the rear spindle headstock 41 side will be described. Before that, first, the rear spindle 4 will be described.
The configuration of No. 3 will be briefly described. As shown in FIG. 5, first, there is a housing 61, and a spindle 63 is rotatably mounted inside the housing 61 via a bearing member 65. Chuck pawl means 67 is installed on the right side of the spindle 63 in FIG. The chuck claw means 67 is composed of a claw holder 69 and a chuck claw 71 attached to the claw holder 69. The chuck claw 71 is attached rotatably around the shaft member 73. The spindle 63 and the chuck claw means 67 are integrally rotatable by a rotation drive unit (not shown).

A shifter 7 is provided on the outer circumference of the spindle 63.
5, the shifter 75 has a spindle 6
It is attached so as to be rotatable with respect to 3 and movable in the axial direction. The shifter 75 is rotatably attached to the lever 77. The lever 77 is connected to a hydraulic cylinder mechanism (not shown). The hydraulic cylinder mechanism is configured to move the shifter 75 in the axial direction via the lever 77.

A push sleeve 81 is internally provided on the inner peripheral side of the spindle 63, and the right end of the push sleeve 81 in FIG. 5 is brought into contact with and disposed on the acting portion 71a of the chuck claw 71. A chuck sleeve 83 is provided on the inner peripheral side of the spindle 63 and on the left side of the pressing sleeve 81 in FIG. This chuck sleeve 83
5 is in contact with and arranged on the pushing sleeve 81.

A collet chuck 85 is provided inside the chuck sleeve 83. The tip of the collet chuck 85 has a 30% shape, and the work 4 is selectively gripped by opening and closing the tip. A coil spring 87 is arranged between the base end of the collet chuck 85 and the stepped portion on the base side of the chuck sleeve 83. The chuck sleeve 83 is normally urged to the right side in FIG. 5 by the spring force of the coil spring 87. Further, a cap 89 is capped on the tip of the collet chuck 85.

Then, when the shifter 75 is moved to the right side in FIG. 5 via the lever 77 by the hydraulic cylinder mechanism, the chuck claw 71 is opened. This chuck claw 71
5 causes the action portion 71a of the chuck claw 71 to move to the left side in FIG. 5, whereby the pushing sleeve 81 and the chuck sleeve 83 move to the left side in FIG. 5 against the spring force of the coil spring 87. When the chuck sleeve 83 moves, the collet chuck 85 is closed by the action of the tapered surface 83a of the chuck sleeve 83 and the tapered surface 85a of the collet chuck 85, whereby the work 4 is gripped.

On the other hand, when the hydraulic cylinder mechanism moves the shifter 75 to the left side in FIG. 5 via the lever 77, the chuck claw 71 is closed. By closing the chuck claw 71, the action portion 71a of the chuck claw 71 moves to the right side in FIG.
1. The chuck sleeve 83 moves to the right in FIG. 5 by the spring force of the coil spring 87. The movement of the chuck sleeve 83 cancels the action of the tapered surface 83a and the tapered surface 85a of the collet chuck 85, and the collet chuck 85 is released by its own spring force. As a result, the grip of the work 4 is released.

A product discharging device for discharging the product 4 is provided on the back main shaft 43 having the above-mentioned structure.
First, the product discharge shaft 101 is internally mounted in the rear main shaft 43 so as to be movable in the axial direction. A tip shaft member 103 is detachably attached to the tip of the product discharge shaft 101. The tip shaft member 103 is appropriately selected and used according to the length and diameter of the product 4. In the case of this embodiment, the tip end shaft member 103 is screwed and joined to the tip inner diameter portion of the product discharge shaft 101.

An intermediate shaft 105 is arranged on the right side of the product discharge shaft 101 in FIG. These product discharge axis 101
The intermediate shaft 105 and the intermediate shaft 105 constitute product extrusion shaft means. The product discharge shaft 101 is always urged to the right side in FIG. 5 by the coil spring 107, and the intermediate shaft 105 is also urged by the coil spring 109 in FIG.
It is always energized to the middle right. Further, in this state, a predetermined gap 111 is formed between the product discharge shaft 101 and the intermediate shaft 105. Therefore, when the back surface main shaft 43 rotates, the product discharge shaft 101 rotates together with the back surface main shaft 43 (the product discharge shaft 101 does not rotate in synchronization with the back surface main shaft 43 but rotates through the inner diameter portion). However, the intermediate shaft 105 does not rotate.

An arm 113 is attached to the Z ₂ -axis table 48 on which the back spindle 43 is mounted. A lever 115 is attached to the arm 113 so as to be rotatable around a shaft member 117. The lever 115
5, a roller 119 is rotatably attached via a shaft member 121. And this roller 1
19 is abutted and arranged on the rear end of the intermediate shaft 105.
A stopper member 123 is attached to the arm 113. The lever 115 is normally rotated and biased by the spring force of the coil spring 109 to a position where it abuts the stopper member 123 via the intermediate shaft 105. FIG. 5 shows the state.

On the other hand, a support 125 is installed at a predetermined position on the bed 1 side. The support 125 and the lever 115 already described constitute a drive means. As shown in FIG. 4, the above-mentioned predetermined position is a predetermined position that is largely separated from the processing position along the X ₂ axis direction and corresponds to the product discharge chute 53 already described.
The column 125 is the shaft member 12 attached to the bed 1.
7, a tip sliding member 129 axially slidably attached to the tip of the shaft member 127, and a coil spring 13 for urging the tip sliding member 129 rightward in FIG.
1 and 1. In addition, the tip sliding member 129
It is assumed that the pop-out position of is restricted by a stopper (not shown).

The operation will be described based on the above configuration. First, the back spindle 43 holds the product 4 to perform a predetermined back side processing. In this case, as shown in FIG. 4, the back attachment 41 located in a position closer to the center along the X ₂ axis direction, largely apart in the X ₂ axis direction with respect to the column 125. Further, in this state, the product 4 is held by the collet chuck 85 of the back spindle 43.

Next, in order to discharge the product 4, the rear headstock 41 moves by a predetermined amount in the X ₂ axis direction. That is, it is a predetermined position where the axis of the back main shaft 43 and the axis of the column 125 overlap in the Y ₁ axis direction. This is shown in FIG. Next, as shown in FIG. 6, the rear headstock 41 is moved to the headstock 3 side along the Z ₂ axis direction. Thereby, the lever 11 is attached to the tip of the moving member 129 of the column 125.
The roller 122 attached to the No. 5 abuts.

From there, the rear headstock 41 is further moved in the Z ₂ -axis direction, and as shown in FIG.
15 is rotated and biased counterclockwise in the figure. Lever 11
By rotating and urging 5, the intermediate shaft 105 and the product discharge shaft 10
1 moves to the left side in the figure. As a result, as shown in FIG. 8, the product 4 is pushed out from the tip of the back spindle 43 and discharged onto the product discharge chute 53.
At this time, the grip of the product 4 by the collet chuck 85 on the back spindle 43 side is released at a predetermined timing. Also, at that time, the fact that the product 4 has been discharged means that the lever 1
It is detected by the contact of 15 with the sensor 143.

To supplement the explanation of the movement control of the rear headstock 41 in the Z ₂ -axis direction, first, a relatively high speed (for example, 18 m / m) is reached up to a predetermined position before the roller 122 of the lever 115 contacts the support 125. min) to move. Next, the speed is switched to a low speed (for example, 3 m / min) and the movement is further performed in the Z ₂ axis direction. When the product 4 is moved by a predetermined amount, the grip of the product 4 by the collet chuck 85 on the rear spindle 43 side is released. Then, the product 4 is discharged by moving in the Z ₂ axis direction at a predetermined speed (for example, 3 m / min).

When the discharge of the product 4 is completed, the rear headstock 41 retreats in the direction away from the headstock 3 side along the Z ₂ axis direction. As a result, the urging by the column 125 is also released, so that the lever 115 and the intermediate shaft 105
Is returned to its original position by the coil spring 109, and the product discharge shaft 101 is
It returns to the original position by 07. Product discharge axis 10
The return of 1 to the original position is detected by the sensor 141.

As described above, according to this embodiment, the following effects can be obtained. First, not only the Z ₂ axis direction but also X
_With the rear headstock 41 that also moves in the _two- axis directions, desired products can be discharged without requiring a separate drive source and without increasing the stroke in the Z2-axis direction. This sets the product discharge position at a position separated from the machining position by a predetermined amount along the X ₂ axis direction,
This is because at the product discharge position, the product discharge operation is performed using the movement of the back spindle stock 41 in the Z ₂ axis direction. Product discharge shaft 101 and intermediate shaft 10 at all times
Since the gap 111 is provided between the rear surface main shaft 43 and the rear surface main shaft 43, even if the rear surface main shaft 43 rotates and the product discharge shaft 101 rotates (the product discharge shaft 101 does not rotate in synchronization with the rear surface main shaft 43, The intermediate shaft 105 does not rotate, and therefore the intermediate shaft 105 and the roller 119 on the lever 115 side are not worn by friction. . Further, since the tip end shaft member 103 is detachably provided at the tip end of the product discharge shaft 101, even if the length or outer diameter of the product 4 is changed, it is sufficient to replace only the tip end shaft member 103. is there. Further, in the pillar 125, when a large load is applied, the tip sliding member 129 causes the coil spring 1 to move.
Since it is configured to slide against the spring force of 31, the respective parts will not be damaged by the action of a large load.

Next, a second embodiment of the present invention will be described with reference to FIG. In the case of this second embodiment,
The arm 203 attached to the X ₂ axis table 48 is arranged with the lever 201 extended along the X ₂ axis direction.
The shaft member 205 is attached so as to be rotatable around the shaft member 205. A roller 207 is rotatably attached to one end of the lever 201 via a shaft member 209. A roller 213 is rotatably attached to the other end of the lever 201 about the shaft member 211.

On the other hand, a support 215 is installed on the bed 1 side in a state of being extended in the X ₂ axis direction. The column 21
Reference numeral 5 designates a shaft member 217 attached to the base 1, a tip sliding member 219 attached to the tip of the shaft member 217 so as to be slidable in the axial direction, and the tip sliding member 219 in the upward direction in the drawing. It is composed of a coil spring 221 for urging. Further, the protrusion amount of the tip end sliding member 219 is regulated by a stopper (not shown). The other structure is the same as that of the first embodiment, and the same parts are designated by the same reference numerals and the description thereof is omitted.

According to the above configuration, when the product 4 is discharged, first, the back spindle stock 41 is positioned at a predetermined position in the Z ₂ axis direction. Next, in this state, the back headstock 41 is moved in the X ₂ axis direction. As a result, the lever 201 is biased from the column 215 side via the roller 211, and thereby the lever 201 is rotated and biased counterclockwise in the drawing. Thereby, the intermediate shaft 105 and the product discharge shaft 10 are operated by the same operation as in the case of the first embodiment.
The product 4 is discharged onto the product discharge chute 53 via 1. After discharging the product 4, the rear headstock 41 is returned to the base along the X ₂ axis direction, whereby the lever 201, the intermediate shaft 105, and the like are returned to their original positions.

Therefore, the same effect as in the case of the first embodiment can be obtained.

Next, a third embodiment of the present invention will be described with reference to FIG. In the case of the first embodiment and the second embodiment, the lever is rotatably attached to the Z ₂ -axis table 48 side, but in the case of the third embodiment, this is attached. It shows an example of attachment to the bed 1 side.

First, an arm 301 is attached to the bed 1, and a lever 30 is attached to the tip of this arm 301.
3 is attached so as to be rotatable around the shaft member 305. The lever 303 is rotated and urged in the clockwise direction in FIG. 10 by the coil spring 306 and is in contact with the stopper 308. A roller 307 is rotatably attached to the tip of the lever 305 via a shaft member 309. Further, a roller 311 is rotatably attached via a shaft member 313 to the attachment base side of the lever 303. On the other hand, another arm 315 is attached to the Z ₂ axis table 48 side, and a column 317 is attached to this arm 315. Since other configurations are similar to those of the first embodiment, the same parts are designated by the same reference numerals and the description thereof will be omitted.

In this case, as in the case of the first embodiment, the rear headstock 41 is positioned at a predetermined position along the X ₂ axis direction. Next, the back spindle stock 41 is moved along the Z ₂ axis direction. As a result, the support 317 moves the lever 303 to the coil spring 3 via the roller 311.
It is urged against the spring force of 06 to rotate and urge counterclockwise in the figure. As a result, the product 4 is discharged via the roller 307, the intermediate shaft 105, and the product discharge shaft 101. Further, the back head stock 41 is returned by returning along the Z ₂ axis direction. In addition, even in the present embodiment, a lost motion mechanism may be provided as in the case of the first and second embodiments. In that case, the pillar 3
It may be provided on either the arm 17 or the arm 301.

Therefore, also in the case of the third embodiment, the same effect as in the case of the first and second embodiments can be obtained.

The present invention is not limited to the first to third embodiments. For example, various configurations are conceivable with respect to the configuration of the drive unit and the relationship between the drive unit and the product extrusion shaft unit, and are not necessarily limited to those illustrated. Also, various configurations of the automatic lathe can be considered.

[0045]

As described in detail above, according to the automatic lathe according to the present invention, a desired product discharging operation can be performed by utilizing the movement of the headstock without separately requiring a drive source such as a cylinder mechanism as in the conventional case. Since the product discharge position is set to a position that can be performed and is separated from the processing position in the X ₂ axis direction, it is possible to prevent the stroke from expanding in the Z ₂ axis direction and prevent the apparatus from becoming large. You can Further, the product extruding shaft means is composed of a product discharging shaft arranged at the front and rotating with the rotation of the main shaft, and an intermediate shaft arranged at the rear, which does not rotate with the rotation of the main shaft, and is always provided with separate elastic members. When the member is urged rearward and the gap is set between the two, the intermediate shaft does not rotate, so that, for example, the intermediate shaft and one end of the lever come into contact with each other and are arranged. In the case of the configuration, it is possible to avoid wear due to friction with one end of the lever. Further, when the tip shaft member is detachably provided at the tip of the product extruding shaft means, it can be selected and used according to the length and the outer diameter of the product, that is, if only the tip shaft member is appropriately replaced, It can be applied to products with various lengths and outer diameters. Further, in the case where the above-mentioned strut is provided with the tip sliding member elastically held, the tip sliding member is slid when a certain load or more is exerted when acting on the lever during product discharge. By moving it, the load can be absorbed, whereby damage to each part can be prevented.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention, and is a plan view showing an overall configuration of an automatic lathe.

FIG. 2 is a view showing a first embodiment of the present invention and is a side view showing an overall configuration of an automatic lathe.

FIG. 3 is a view showing the first embodiment of the present invention and is a front view showing the overall configuration of the automatic lathe.

FIG. 4 is a diagram showing the first embodiment of the present invention and is a plan view showing a partial configuration of an automatic lathe.

FIG. 5 is a view showing the first embodiment of the present invention and is a side view showing a partial configuration of an automatic lathe.

FIG. 6 is a view showing a first embodiment of the present invention, and is a partial side view of an automatic lathe for explaining the operation.

FIG. 7 is a diagram showing the first embodiment of the present invention, and is a partial side view of the automatic lathe for explaining the operation.

FIG. 8 is a diagram showing the first embodiment of the present invention and is a partial side view of an automatic lathe for explaining the operation.

FIG. 9 is a view showing a second embodiment of the present invention, and is a side view showing a partial configuration of an automatic lathe.

FIG. 10 is a view showing a second embodiment of the present invention and is a side view showing a configuration of a part of an automatic lathe.

FIG. 11 is a view showing a conventional example, which is a cross-sectional view showing a configuration of a product discharging device.

[Explanation of symbols]

1 bed 4 products 41 rear headstock 43 rear main spindle 48 X _2- axis table 101 product discharge shaft 105 intermediate shaft 115 lever 125 prop

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[Submission date] September 21, 2001 (2001.9.2)
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Claims (8)

[Claims] 1. A bed and a spindle for holding a workpiece, which is a product arranged on the bed, to be rotatably provided, and a Z ₂ axis direction which is an axial center direction of the spindle and an X ₂ axis orthogonal to the Z ₂ axis direction. And a headstock that can move in any direction, and is inserted and arranged in the spindle from the rear, and is normally biased rearward by an elastic member, and is driven forward against the biasing force of the elastic member during product discharge. By this, the product push-out shaft means for pushing out the product housed in the tip end of the main shaft and the product head set at the position apart from the machining position by a predetermined distance along the X ₂ axis direction when the product is discharged. It moves toward the discharge position in the X ₂ axis direction and the Z ₂ axis direction while controlling the movement thereof, and acts on the product pushing shaft means to drive it forward, whereby it is accommodated in the tip portion of the main shaft. Extruded products An automatic lathe, comprising: a drive unit for discharging. 2. The automatic lathe according to claim 1, wherein a lever is attached to the headstock side, and the lever is normally urged rearward together with the product pushing shaft means by an elastic member. On the other hand, a supporting column is fixed and arranged at a predetermined product discharging position along the X ₂ axis direction on the bed side, and at the time of discharging the product, the headstock is predetermined from the processing position along the X ₂ axis direction. By moving to the product discharge position and moving in the Z ₂ -axis direction, the lever acts on the strut to rotate it forward and drive the product pushing shaft means forward, thereby causing the spindle to move. The automatic lathe is characterized in that the product stored at the tip of is pushed and discharged. 3. The automatic lathe according to claim 1, wherein a lever is attached to the headstock side, and the lever is normally urged rearward together with the product pushing shaft means by an elastic member. On the other hand, a support is fixed and arranged at a predetermined product discharge position along the X ₂ axis direction on the bed side, and after moving the headstock in the Z ₂ axis direction at the time of product discharge, X
By moving along the _two axial directions from the processing position to a predetermined product discharge position, the lever acts on the support column to rotate the support column, and at the same time, to drive the product push-out shaft means forward, whereby the main shaft is rotated. The automatic lathe is characterized in that the product stored at the tip of is pushed and discharged. 4. The automatic lathe according to claim 1, wherein a column is attached to the headstock side, and a lever is attached to the bed side.
The lever is normally urged to rotate rearward by an elastic member, and when the product is discharged, the headstock is moved along the X ₂ axis direction from the processing position to a predetermined product discharge position and is moved in the Z ₂ axis direction. By doing so, the column is acted on the lever to rotate the column forward, and the product pushing shaft means is driven forward, thereby pushing out and discharging the product accommodated in the tip portion of the main shaft. An automatic lathe characterized by the above. 5. The automatic lathe according to any one of claims 1 to 4, wherein the product extruding shaft means is arranged at the front and rotates along with the rotation of the main shaft, and a product discharging shaft is arranged at the rear. The automatic lathe is characterized in that it is composed of an intermediate shaft that does not rotate with the rotation of, and is normally biased rearward by separate elastic members and that a gap is set between the two. 6. The automatic lathe according to any one of claims 1 to 5, wherein the product extruding shaft means is detachably provided with a tip shaft member at the tip thereof, depending on the length and outer diameter of the product. An automatic lathe that is configured to be selectable and usable. 7. The automatic lathe according to any one of claims 2 to 6, wherein the support column is provided with a tip sliding member elastically held, and when the support acts on the lever at the time of discharging the product, a certain amount or more. When the above load is applied, the load can be absorbed by sliding the tip sliding member against the elastic force. 8. The automatic lathe according to any one of claims 1 to 7, wherein the headstock is a rear-side headstock that faces and is arranged on the front-side headstock.