JP7139059B2 - Work transfer device - Google Patents

Description

The present invention relates to a work transfer device for transferring a work from a machining chamber to the outside.

2. Description of the Related Art Conventionally, there has been known a work conveying device that conveys a work machined in a machining chamber to the outside (see, for example, Patent Document 1).

Japanese Patent No. 4303810

A first receiving portion for receiving the workpiece gripped by the main shaft and a second receiving portion for receiving the workpiece from the first receiving portion are provided, and the first receiving portion prevents the workpiece from falling from the end surface of the first receiving portion. When the first receiving part rotates, the work drops from the opening in the peripheral surface of the first receiving part and is transferred to the second receiving part, and the second receiving part moves in the axial direction of the main shaft. In addition, there is a work conveying device that conveys a work by moving relative to the first receiving portion.

In such a work conveying device, when the second receiving section to which the work is transferred from the first receiving section moves relative to the first receiving section, the stopper section of the first receiving section interferes with the work. There is a problem that there is a risk of

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a work conveying apparatus capable of smoothly transferring and conveying a work from a first receiving section to a second receiving section.

In order to achieve the above object, the work conveying apparatus of the present invention comprises a first receiving section for receiving a work gripped by a spindle, and a second receiving section for receiving the work from the first receiving section. The part has a stopper part for preventing the work from falling from the end surface of the first receiving part, and the rotation of the first receiving part causes the work to fall from the opening in the peripheral surface of the first receiving part, and the second receiving part. A work conveying device that conveys a work by transferring the work to a part and moving the second receiving part relative to the first receiving part in the axial direction of the main shaft, wherein the second receiving part is the work conveying device A positioning part for positioning is provided, and the positioning part positions the workpiece at a position where it does not interfere with the stopper part when the second receiving part moves relative to the first receiving part.

In the work conveying apparatus of the present invention configured as described above, the work can be smoothly transferred from the first receiving section to the second receiving section and conveyed.

1 is a perspective view showing the configuration of a machine tool of Example 1. FIG. 2 is a plan view showing the configuration of the device main body of Example 1. FIG. 4 is a perspective view showing the configuration of the first receiving portion of Example 1. FIG. 4 is a cross-sectional view showing the configuration of the first receiving portion of Example 1. FIG. 2 is a side view showing the configuration of the work conveying device of Example 1. FIG. 4 is a perspective view showing the configuration of a second receiving section of the work conveying device of Example 1. FIG. 4 is a cross-sectional view showing the configuration of a second receiving portion of the work conveying device of Example 1. FIG. FIG. 4 is an explanatory diagram for explaining the operation of the machine tool of Example 1, and shows a state where the work conveying device is at the standby position; FIG. 4 is an explanatory diagram for explaining the operation of the machine tool of Example 1, and shows a state where the work conveying device is at the standby position; FIG. 4 is an explanatory diagram for explaining the operation of the machine tool of Example 1, showing a state in which the work conveying device is at the retracted position; FIG. 4 is an explanatory diagram for explaining the operation of the machine tool of Example 1, showing a state where the work conveying device is at the receiving position; FIG. 4 is an explanatory diagram for explaining the operation of the first receiving section of Example 1; FIG. 4 is an explanatory diagram for explaining the operation of the first receiving section of Example 1; FIG. 4 is an explanatory diagram for explaining the operation of the machine tool of Example 1, showing a state in which the work conveying device is at the retracted position; FIG. 4 is an explanatory diagram for explaining the operation of the machine tool of Example 1, and shows a state where the work conveying device is at the standby position; FIG. 4 is an explanatory diagram for explaining the operation of the machine tool of Example 1, showing a state where the work conveying device is at the recovery position; FIG. 4 is an explanatory diagram for explaining the operation of the machine tool according to the first embodiment, and is an explanatory diagram for explaining the operation of the conveying device main body at the recovery position;

An embodiment for realizing a work conveying device according to the present invention will be described below based on Example 1 shown in the drawings.

The work conveying device in Example 1 is applied to an automatic lathe device.

[Composition of the machine tool]
The configuration of the machine tool of Example 1 will be described below with reference to FIG.

The machine tool 1 includes an apparatus main body 10 for machining a predetermined workpiece, and a control section (not shown) for overall control of the machine tool 1 .

The device body 10 is covered with a body cover 11 . A body cover 11 is provided with an openable door body 12 . A space surrounded by the body cover 11 and the door 12 is configured as a processing chamber K. As shown in FIG.

[Configuration of device body]
The configuration of the apparatus main body 10 of the first embodiment will be described below with reference to FIG. The apparatus main body 10 includes a front spindle 115 as a main spindle, a back spindle 215, a tool post 18, and a work transfer device 30 in a machining chamber K. As shown in FIG. A work collection case 50 is provided outside the processing chamber K. As shown in FIG.

Note that the axial direction of the front main shaft 115 is the Z-axis direction, the direction perpendicular to the Z-axis direction in the horizontal direction is the X-axis direction, and the vertical direction perpendicular to the Z-axis and the X-axis is the Y-axis direction. 2 is defined as the right direction R, and the left direction is defined as the left direction L in FIG.

The front spindle 115 is supported by a headstock 116 . A ball screw 118 is attached to the headstock 116 . The front main shaft 115 slides in the Z-axis direction along a guide rail 117 provided on the bed 15 by rotating a ball screw 118 by a motor 119 .

The back main shaft 215 is provided on the left side of the front main shaft 115 so as to face the front main shaft 115 . That is, the axis A of the front main shaft 115 coincides with the axis of the back main shaft 215 . The back spindle 215 is supported by a headstock 216 . A ball screw 218 is attached to the headstock 216 . A motor 219 rotates a ball screw 218 to slide the back main shaft 215 along a guide rail 217 provided on the bed 15 in the Z-axis direction. Also, the first receiving section 20 that constitutes a part of the work conveying device 30 is attached to the back spindle 215 .

The tool post 18 holds a tool for processing the workpiece W gripped by the front spindle 115 and is provided near the front spindle 115 .

[Configuration of First Receiving Unit]
The configuration of the first receiving unit 20 according to the first embodiment will be described below with reference to FIGS. 3 and 4. FIG.

The first receiving part 20 has a first receiving part body 21 and a first receiving part base 22 . The first receiving portion main body 21 includes a wall-shaped stopper portion 21a.

The first receiving portion main body 21 is formed in a semi-cylindrical shape. The stopper portion 21 a is formed at the front end of the first receiving portion main body 21 . The stopper portion 21a is formed in a semi-doughnut shape when viewed from the end surface direction. The stopper portion 21 a is formed so as to protrude radially inward from the first receiving portion main body 21 .

The first receiver base 22 is fixed to the rear main shaft 215 with bolts V. As shown in FIG. As a result, the first receiving portion 20 rotates integrally with the back surface main shaft 215, and the first receiving portion main body 21 rotates in an upward posture in which the opening of the peripheral surface of the first receiving portion main body 21 faces upward. A downward posture in which the opening of the face faces downward can be taken.

[Construction of Work Transfer Device]
The configuration of the work transfer device 30 of the first embodiment will be described below with reference to FIGS. 2 and 5 to 7. FIG.

The work transfer device 30 includes a transfer device main body 30A, a ball screw 41, and a rail 42. As shown in FIG. The work conveying device 30 also includes a first receiving section 20 .

The conveying device main body 30A includes a first case 31 and a second case 32 as a second receiving portion, a first arm 33 and a second arm 34 as an opening/closing mechanism, an arm body 36, and a support body 38. .

The arm body 36 is pivotally supported by an arm body support shaft 37 fixed to the support body 38 . The arm body 36 is connected to an arm body driving section (not shown) and is rotatable around an arm body support shaft 37 .

A ball screw nut 38 a and a guide portion 38 b are attached to the support 38 .

A ball screw 41 is attached to the ball screw nut 38a. The guide portion 38 b is supported by rails 42 provided on the bed 15 . The conveying device main body 30A slides in the Z-axis direction along the rails 42 as the ball screw 41 is rotated by the motor 70 .

The ball screw 41 and the rail 42 extend from the inside of the machining chamber K to the work collection case 50 outside the machining chamber K. As shown in FIG. The conveying device main body 30A receives the processed work W inside the processing chamber K, moves along the rail 42 to the outside of the processing chamber K, and collects the processed work W in the work collection case 50. ing.

The body cover 11 is provided with an opening 11a through which the conveying device body 30A passes.

The first case 31 includes a first case main body 31a, a first left wall 31b as a wall portion, and a first right wall 31c.

The first case main body 31a is formed in a semi-cylindrical shape. That is, the first case main body 31a forms a recess along the Z-axis direction.

The first left wall 31 b is formed at the left end of the first case 31 . The first left wall 31b is formed in a semi-doughnut shape when viewed from the Z-axis direction. The first left wall 31b is formed to protrude radially inward from the first case main body 31a.

The first right wall 31 c is formed at the right end of the first case 31 . The first right wall 31c is formed in a semicircular shape when viewed from the Z-axis direction.

The second case 32 has a substantially symmetrical shape with the first case 31, and includes a second case main body 32a, a second left wall 32b as a wall portion, and a second right wall 32c.

The second case main body 32a is formed in a semi-cylindrical shape. That is, the second case main body 32a forms a recess along the Z-axis direction.

A second left wall 32 b is formed at the left end of the second case 32 . The second left wall 32b is formed in a semi-doughnut shape when viewed from the Z-axis direction. The second left wall 32b is formed to protrude radially inward from the second case main body 32a.

The second right wall 32 c is formed at the right end of the second case 32 . The second right wall 32c is formed in a semicircular shape when viewed from the Z-axis direction.

A first arm 33 is attached to the first case 31 . A second arm 34 is attached to the second case 32 . The first arm 33 and the second arm 34 are supported by an arm shaft 35 attached to an arm body 36 .

The first arm 33 and the second arm 34 are connected to an arm drive section (not shown) and are rotatable around an arm shaft 35 . By rotating the first arm 33 and the second arm 34 around the arm shaft 35, the closed state in which the first case 31 and the second case 32 are combined, and the first case 31 and the second case 32 are closed. can be switched to an open state and an open state.

In the closed state of the first case 31 and the second case 32, they form a cylindrical case having an accommodation space S therein.

In the closed state of the first case 31 and the second case 32, the semi-doughnut-shaped first left wall 31b and the second left wall 32b are put together to form an opening 40. As shown in FIG. The opening 40 is formed in a circular shape when viewed from the Z-axis direction.

[Machine Tool Operation]
The operation of the machine tool of Example 1 will be described below with reference to FIGS. 8 to 17. FIG.

The work transfer device 30 of the machine tool 1 can move between a standby position P0, a retracted position P1, a receiving position P2, and a collecting position P3.

The retracted position P1 is a position where the cylindrical case formed by the first case 31 and the second case 32 is separated from the first receiving portion 20 in the Z-axis direction. This position coincides with the axis A.

The receiving position P2 is a position where the first receiving part 20 is inserted into the housing space S, and the central axis of the cylindrical case formed by the first case 31 and the second case 32 coincides with the axis A. position.

The standby position P0 is a position where the first case 31 and the second case 32 have turned and moved on a plane perpendicular to the axis A from the retracted position P1. not in position.

A collection position P3 is a position where the conveying device main body 30A has moved from the standby position P0 to the work collection case 50 in the Z-axis direction.

As shown in FIG. 8, the workpiece W gripped by the front main spindle 115 is machined into a predetermined shape by a predetermined tool of the tool rest 18 . At this time, the transport device main body 30A is at the standby position P0.

Next, as shown in FIG. 9, the headstock 216 moves in the right direction R along the guide rails 217 . At this time, the first receiving portion 20 is in an upward posture in which the opening of the peripheral surface of the first receiving portion main body 21 faces upward.

When the first receiving section 20 moves below the workpiece W, the headstock 216 stops. When the headstock 216 stops, the machined workpiece W is separated from the front main spindle 115 by parting off. The separated work W is dropped and placed on the inner peripheral surface of the first receiving portion main body 21 of the first receiving portion 20 in the upward posture. That is, the first receiving section 20 receives the machined workpiece W from the front spindle 115 .

Next, as shown in FIG. 10, the headstock 216 moves leftward L along the guide rail 217 . At this time, the stopper portion 21 a prevents the work W from dropping from the end face of the first receiving portion 20 .

Next, the arm body 36 rotates around the arm body support shaft 37, and the conveying device main body 30A moves to the retracted position P1.

Next, as shown in FIG. 11, the conveying device main body 30A moves leftward L along the rail 42 to the receiving position P2. At this time, the first case 31 and the second case 32 are closed to form a cylindrical case in which the workpiece W can be placed. Then, as shown in FIG. 12 , the first receiver body 21 is inserted into the accommodation space S through the opening 40 .

Here, the diameter of the opening 40 is formed slightly larger than the outer diameter of the first receiver body 21 . Therefore, the first receiving section main body 21 can be inserted along the axis A from the opening 40 and accommodated in the accommodation space S. As shown in FIG.

Next, as shown in FIG. 13, the rear main shaft 215 of the first receiving section 20 rotates, and the opening of the peripheral surface of the first receiving section main body 21 faces downward. When the first receiving portion 20 is in the downward posture, the work W drops from the first receiving portion main body 21 and is placed on the inner surface 31 e of the first case 31 and the inner surface 32 e of the second case 32 . That is, the first case 31 and the second case 32 as the second receiving portion receive the work W from the first receiving portion 20 .

Next, as shown in FIG. 14, the conveying device main body 30A moves in the right direction R along the rail 42 and returns to the retracted position P1.

Here, the inner surface 31e of the first case 31 and the inner surface 32e of the second case 32 form a recess along the Z-axis direction. Therefore, the workpieces W placed on the inner surface 31e of the first case 31 and the inner surface 32e of the second case 32 are positioned so as not to move left and right in the Z-axis direction. That is, the inner surfaces 31e and 32e of the cylindrical case form positioning portions. Therefore, the workpiece W is arranged at a position that does not interfere with the stopper portion 21a.

Next, as shown in FIG. 15, the transfer device main body 30A returns to the standby position P0 as the arm body 36 of the work transfer device 30 rotates around the arm support shaft 37. As shown in FIG.

Next, as shown in FIG. 16, the conveying device main body 30A moves along the rail 42 through the opening 11a to the recovery position P3 of the work recovery case 50 outside the main body cover 11. As shown in FIG.

Next, as shown in FIG. 17, the first case 31 and the second case 32 are moved from the closed state of the first case 31 and the second case 32 to the first opening by the first arm 33 and the second arm 34 as the opening/closing mechanism. The state transitions to the open state of the case 31 and the second case 32 .

When the first case 31 and the second case 32 are opened, the work W drops and is collected in the work collection case 50 .

[Operation of work conveying device]
The operation of the work conveying device 30 of the first embodiment will be described below. The work conveying device 30 of the first embodiment includes a first receiving portion 20 that receives the work W gripped by the main shaft (front main shaft 115) and a second receiving portion (first case 31) that receives the work W from the first receiving portion 20. , a second case 32), and the first receiving portion 20 includes a stopper portion 21a for preventing the work W from falling from the end surface of the first receiving portion 20, and the rotation of the first receiving portion 20 causes the work W to move. W falls from the opening of the peripheral surface of the first receiving portion 20, is transferred to the second receiving portion (first case 31, second case 32), and is transferred to the second receiving portion (first case 31, second case 32). The case 32) conveys the work W by moving relative to the first receiving portion 20 in the axial direction of the main shaft (front main shaft 115). In this work conveying device 30, the second receiving portion (first case 31, second case 32) has positioning portions (inner surfaces 31e, 32e) for positioning the work W, and the positioning portions (inner surfaces 31e, 32e) positions the workpiece W at a position where it does not interfere with the stopper portion 21a when the second receiving portion (first case 31, second case 32) moves relative to the first receiving portion 20 (FIG. 13).

As a result, when the second receiving portion (the first case 31 and the second case 32) to which the work W is transferred from the first receiving portion 20 moves relative to the first receiving portion 20, the stopper portion 21a The workpiece W can be positioned at a position that does not interfere with the Therefore, the work W can be smoothly transferred from the first receiving section 20 to the second receiving section (the first case 31 and the second case 32) and conveyed.

In the work transfer device 30 of Example 1, the positioning portions (inner surfaces 31e, 32e) are recesses extending along the axial direction of the main shaft (front main shaft 115) (FIG. 7).

As a result, the workpiece W placed on the positioning portions (inner surfaces 31e and 32e) can be prevented from moving left and right in the axial direction of the main spindle (front main spindle 115). Therefore, when the work conveying device 30 moves from the receiving position P2 to the retracted position P1, the work W placed on the positioning portions (inner surfaces 31e and 32e) can be prevented from interfering with the stopper portion 21a. .

In the work conveying device 30 of Example 1, the positioning portions (inner surfaces 31e, 32e) are the inner surfaces (inner surfaces 31e, 32e) of the cylindrical case (FIG. 7).

As a result, when the positioning portions (inner surfaces 31e and 32e) are rotated in a plane perpendicular to the axial direction of the main shaft (front main shaft 115), the work W can be prevented from dropping from the cylindrical case. In addition, it is possible to prevent chips and cutting water from entering the positioning portions (inner surfaces 31e and 32e) while the workpiece W is being processed.

In the work transfer device 30 of the first embodiment, the second receiving portion (first case 31, second case 32) has wall portions (first left wall 31b, second left wall 32b) (FIG. 6).

This prevents the workpiece W from falling from the positioning portions (inner surfaces 31e, 32e) when the second receiving portion (first case 31, second case 32) moves from the receiving position P2 to the retracted position P1. To prevent.

The work conveying apparatus of the present invention has been described above based on the first embodiment. However, the specific configuration and operation are not limited to this embodiment, and design changes and additions are permitted without departing from the gist of the invention according to each claim of the claims.

In Example 1, the first case main body 31a and the second case main body 32a are formed in a semi-cylindrical shape as recesses formed along the axial direction of the back main shaft 215. As shown in FIG. However, in the first case main body 31a and the second case main body 32a, the concave portion formed along the axial direction of the back main shaft 215 may be V-shaped in cross section perpendicular to the Z-axis direction.

Embodiment 1 shows an example in which the present invention is applied to a machine tool having a front spindle 115 and a back spindle 215 . However, the present invention can be applied to machine tools with multiple spindles.

In Example 1, an example in which one work collection case 50 is provided is shown. However, a plurality of work recovery cases may be provided.

In the first embodiment, an example is shown in which the first receiving portion main body 21, the first case main body 31a, and the second case main body 32a are not provided with through-holes for releasing the cutting oil. However, the first receiving portion main body, the first case main body, or the second case main body may be provided with through-holes for letting the cutting oil escape.

In Example 1, an example in which the first receiving portion base 22 is fixed to the back main shaft 215 with the bolt V is shown. However, the first receiving part may be fixed by a chuck provided on the back spindle.

Embodiment 1 shows an example in which the present invention is applied to an automatic lathe. However, the present invention can be applied to machine tools such as other cutting machines, polishing machines, and special machining machines such as electrical discharge machines.

REFERENCE SIGNS LIST 1 machine tool 20 first receiving portion 21a stopper portion 30 work conveying device 31 first case (an example of a second receiving portion)
31b 1st left wall (an example of a wall)
31e inner surface (an example of positioning part)
32 Second case (an example of the second receiving part)
32b Second left wall (an example of a wall)
32e inner surface (an example of a positioning part)
115 front spindle (an example of a spindle)
P1 Retreat position P2 Receiving position W Work

Claims (4)

a semi-cylindrical first receiving portion for receiving the workpiece gripped by the spindle;
a second receiving section that receives the workpiece from the first receiving section;
The first receiving portion includes a stopper portion that prevents the workpiece from falling from the end surface of the first receiving portion,
By the rotation of the first receiving portion, the work falls from the opening of the peripheral surface of the first receiving portion and is transferred to the second receiving portion;
A work conveying device that conveys the work by moving the second receiving portion relative to the first receiving portion in the axial direction of the main shaft,
The second receiving part has a semi-cylindrical first case and a second case which are configured to be openable and closable,
The first case and the second case are combined to form a cylindrical case having an accommodating space therein into which the first receiving portion is inserted in a closed state, and the workpiece is positioned on the inner surface of the cylindrical case. has a positioning unit that performs
The work conveying device, wherein the positioning portion positions the work at a position that does not interfere with the stopper portion when the second receiving portion moves relative to the first receiving portion. The diameter of the opening of the cylindrical case is larger than the outer diameter of the semi-cylindrical first receiving part.
2. The work transfer device according to claim 1, characterized in that: The work conveying device according to claim 1 or 2 , wherein the positioning portion is a concave portion extending along the axial direction of the main shaft. The work transfer device according to any one of claims 1 to 3, wherein the second receiving portion has a wall portion at an end portion of the positioning portion.

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