JP2020069608A - Workpiece transport device - Google Patents

Abstract

To provide a workpiece transport device that can smoothly deliver and transport a workpiece from a first receiving part to a second receiving part.SOLUTION: A workpiece transport device 30 comprises a first receiving part 20 that receives a workpiece W held by a main spindle (a front face main spindle 115) and second receiving parts (a first case 31 and a second case 32) that receive the workpiece W from the first receiving part. The first receiving part comprises a stopper part 21a that prevents the workpiece W from dropping from an end face of the first receiving part. By rotation of the first receiving part, the workpiece W drops from an opening part on a circumferential surface of the first receiving part and then is delivered to the second receiving part, and by relative movement of the second receiving part in an axial direction of the main spindle to the first receiving part, the workpiece W is transported. The second receiving part has positioning parts (inner surfaces 31e and 32e) that perform positioning of the workpiece W, the positioning parts position the workpiece W at a position at which the stopper part 21a is not interfered during relative movement of the second receiving part to the first receiving part.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a work transfer device that transfers a work from a processing chamber to the outside.

  Conventionally, there is known a work transfer device that transfers a work processed in a processing chamber to the outside (see, for example, Patent Document 1).

Japanese Patent No. 4303810

  The first receiving unit includes a first receiving unit that receives the work held by the main shaft and a second receiving unit that receives the work from the first receiving unit. The first receiving unit prevents the work from falling from the end surface of the first receiving unit. The workpiece is dropped from the opening of the peripheral surface of the first receiving portion and transferred to the second receiving portion by the rotation of the first receiving portion, and the second receiving portion is moved in the axial direction of the main shaft. There is a work transfer device that transfers a work by moving relative to the first receiving portion.

  In such a work transfer device, when the second receiving section, which has received the work 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 it may occur.

  Therefore, an object of the present invention is to provide a work transfer device capable of smoothly transferring and transferring a work from the first receiving part to the second receiving part.

  In order to achieve the above-mentioned object, a work transfer device of the present invention comprises a first receiving part for receiving a work gripped by a spindle, and a second receiving part for receiving the work from the first receiving part. The portion includes a stopper portion that prevents the work from falling from the end surface of the first receiving portion, and the rotation of the first receiving portion causes the work to drop from the opening portion of the peripheral surface of the first receiving portion, and the second receiving portion. A work transfer device that transfers a work by transferring the work to the first receiving unit by moving the second receiving unit relative to the first receiving unit in the axial direction of the main shaft. It is characterized in that it has a positioning portion for performing positioning, and 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.

  In the work transfer device of the present invention thus configured, the work can be smoothly transferred and transferred from the first receiving part to the second receiving part.

1 is a perspective view showing the configuration of a machine tool of Example 1. FIG. 3 is a plan view showing the configuration of the apparatus main body of Example 1. FIG. FIG. 3 is a perspective view showing the configuration of a first receiving section of the first embodiment. FIG. 5 is a cross-sectional view showing the configuration of a first receiving section of the first embodiment. FIG. 3 is a side view showing the configuration of the work transfer device of the first embodiment. FIG. 3 is a perspective view showing the configuration of a second receiving section of the work transfer device according to the first embodiment. 5 is a cross-sectional view showing a configuration of a second receiving section of the work transfer device according to the first embodiment. FIG. 6 is an explanatory diagram illustrating the operation of the machine tool according to the first embodiment and illustrates a state in which the work transfer device is at the standby position. FIG. 6 is an explanatory diagram illustrating the operation of the machine tool according to the first embodiment and illustrates a state in which the work transfer device is at the standby position. FIG. 6 is an explanatory diagram illustrating the operation of the machine tool according to the first embodiment and illustrates a state in which the work transfer device is in the retracted position. FIG. 5 is an explanatory diagram illustrating the operation of the machine tool according to the first embodiment and illustrates a state in which the work transfer device is at the receiving position. FIG. 6 is an explanatory diagram illustrating an operation of a first receiving unit according to the first embodiment. FIG. 6 is an explanatory diagram illustrating an operation of a first receiving unit according to the first embodiment. FIG. 6 is an explanatory diagram illustrating the operation of the machine tool according to the first embodiment and illustrates a state in which the work transfer device is in the retracted position. FIG. 6 is an explanatory diagram illustrating the operation of the machine tool according to the first embodiment and illustrates a state in which the work transfer device is at the standby position. FIG. 6 is an explanatory diagram illustrating the operation of the machine tool according to the first embodiment and illustrates a state in which the work transfer device is in the recovery position. It is explanatory drawing explaining the operation | movement of the machine tool of Example 1, and is explanatory drawing explaining the operation | movement of the conveyance apparatus main body in a collection position.

  Hereinafter, an embodiment for realizing a work transfer device according to the present invention will be described based on Embodiment 1 shown in the drawings.

  The work transfer device in the first embodiment is applied to an automatic lathe device.

[Machine tool configuration]
Hereinafter, the configuration of the machine tool according to the first embodiment will be described with reference to FIG.

  The machine tool 1 includes an apparatus body 10 for machining a predetermined work, and a control unit (not shown) that controls the entire machine tool 1.

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

[Device configuration]
Hereinafter, the configuration of the apparatus body 10 according to the first embodiment will be described with reference to FIG. The apparatus main body 10 includes a front spindle 115 as a spindle, a back spindle 215, a tool rest 18, and a work transfer device 30 in the processing chamber K. A work recovery case 50 is provided outside the processing room K.

  The axial direction of the front main shaft 115 is the Z-axis direction, the direction orthogonal to the Z-axis direction in the horizontal direction is the X-axis direction, and the vertical direction orthogonal to the Z-axis and the X-axis is the Y-axis direction. Further, of the Z-axis directions, the rightward direction is the rightward direction R in FIG. 2 and the leftward direction is the leftward direction L in FIG.

  The front spindle 115 is supported by the spindle stock 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 when the ball screw 118 is rotated by the 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 spindle 115 coincides with the axis of the back spindle 215. The back spindle 215 is supported by the headstock 216. A ball screw 218 is attached to the headstock 216. The back main shaft 215 slides in the Z-axis direction along a guide rail 217 provided on the bed 15 when the ball screw 218 is rotated by the motor 219. Further, the back spindle 215 is attached with the first receiving portion 20 that constitutes a part of the work transfer device 30.

  The tool rest 18 holds a tool for processing the work W gripped by the front spindle 115, and is provided in the vicinity of the front spindle 115.

[Structure of the first receiving section]
Hereinafter, the configuration of the first receiving unit 20 according to the first embodiment will be described with reference to FIGS. 3 and 4.

  The first receiving section 20 has a first receiving section main body 21 and a first receiving section 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 21a is formed at the front end of the first receiving portion main body 21. The stopper portion 21a is formed in a half donut shape when viewed from the end face direction. The stopper portion 21a is formed so as to project radially inward of the first receiving portion main body 21.

  The first receiving part base 22 is fixed to the back main shaft 215 by bolts V. As a result, the first receiving portion 20 rotates integrally with the back main shaft 215, and the first receiving portion main body 21 has a peripheral surface having an opening facing upward, and the first receiving portion main body 21 has a peripheral surface. The downward posture in which the opening of the surface faces downward can be adopted.

[Configuration of work transfer device]
The configuration of the work transfer device 30 according to the first embodiment will be described below with reference to FIGS. 2 and 5 to 7.

  The work transfer device 30 includes a transfer device main body 30A, a ball screw 41, and a rail 42. The work transfer device 30 also includes a first receiving unit 20.

  The transport 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 a support body 38. The arm body 36 is connected to an arm body drive unit (not shown) and is rotatable about an arm body support shaft 37.

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

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

  The ball screw 41 and the rail 42 extend from the inside of the processing chamber K to the work recovery case 50 outside the processing chamber K. The transport device main body 30A receives the processed work W inside the processing chamber K, moves to the outside of the processing chamber K along the rail 42, and causes the work recovery case 50 to recover the processed work W. ing.

  The main body cover 11 is provided with an opening 11a through which the transport apparatus main body 30A passes.

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

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

  The first left wall 31b is formed at the left end of the first case 31. The first left wall 31b is formed in a half donut shape when viewed in the Z-axis direction. The first left wall 31b is formed so as to project radially inward of the first case body 31a.

  The first right wall 31c 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 body 32a, a second left wall 32b as a wall portion, and a second right wall 32c.

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

  The second left wall 32b is formed at the left end of the second case 32. The second left wall 32b is formed in a half donut shape when viewed in the Z-axis direction. The second left wall 32b is formed so as to project radially inward of the second case body 32a.

  The second right wall 32c 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.

  The first arm 33 is attached to the first case 31. The second arm 34 is attached to the second case 32. The first arm 33 and the second arm 34 are pivotally 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 driving unit (not shown) and are rotatable about an arm shaft 35. When the first arm 33 and the second arm 34 rotate about the arm shaft 35, the first case 31 and the second case 32 are in a closed state, and the first case 31 and the second case 32 are in a closed state. Can be switched to open and open.

  In the closed state of the first case 31 and the second case 32, a cylindrical case that forms the accommodation space S inside is formed.

  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 combined to form the opening 40. The opening 40 is formed in a circular shape when viewed from the Z-axis direction.

[Machine tool operation]
Hereinafter, the operation of the machine tool according to the first embodiment will be described with reference to FIGS.

  The work transfer device 30 of the machine tool 1 is movable between a standby position P0, a retracted position P1, a receiving position P2, and a recovery position P3.

  The retracted position P1 is a position where the tubular 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, and the central axis of the tubular case is It is a position that coincides with the axis A.

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

  The standby position P0 is a position where the first case 31 and the second case 32 are moved from the retracted position P1 by turning on a plane perpendicular to the axis A, and influences the operation of the front spindle 115 and the back spindle 215. There is no position.

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

  As shown in FIG. 8, the work W gripped by the front main shaft 115 is processed into a predetermined shape by a predetermined tool of the tool rest 18. At this time, the carrier body 30A is in the standby position P0.

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

  When the first receiving section 20 moves to below the work W, the headstock 216 stops. When the headstock 216 stops, the machined workpiece W is separated from the front main spindle 115 by the cut-off processing. 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 unit 20 receives the processed work W from the front main shaft 115.

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

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

  Next, as shown in FIG. 11, the transfer device main body 30A moves in the left direction 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, and the work W can be placed inside. Then, as shown in FIG. 12, the first receiving portion main body 21 is inserted into the accommodation space S through the opening 40.

  Here, the diameter of the opening 40 is formed to be slightly larger than the outer diameter of the first receiving portion main body 21. Therefore, the first receiving portion main body 21 can be inserted into the accommodation space S from the opening 40 along the axis A.

  Next, as shown in FIG. 13, the back surface main shaft 215 of the first receiving portion 20 rotates, and the opening of the peripheral surface of the first receiving portion 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 31e of the first case 31 and the inner surface 32e of the second case 32. That is, the first case 31 and the second case 32 as the second receiving unit receive the work W from the first receiving unit 20.

  Next, as shown in FIG. 14, the transfer 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 work W placed on the inner surface 31e of the first case 31 and the inner surface 32e of the second case 32 is 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 a positioning portion. Therefore, the work W is arranged at a position where it does not interfere with the stopper portion 21a.

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

  Next, as shown in FIG. 16, the transport 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.

  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 case by the first arm 33 and the second arm 34 as an opening / closing mechanism. The case 31 and the second case 32 transit to the open state.

  When the first case 31 and the second case 32 are in the open state, the work W falls and is collected in the work collection case 50.

[Operation of work transfer device]
Hereinafter, the operation of the work transfer device 30 of the first embodiment will be described. The work transfer device 30 according to the first exemplary embodiment includes a first receiving unit 20 that receives a work W gripped by a main shaft (front main shaft 115) and a second receiving unit (first case 31) that receives the work W from the first receiving unit 20. , The 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. W drops from the opening of the peripheral surface of the first receiving section 20 and is delivered to the second receiving section (first case 31, second case 32), and the second receiving section (first case 31, second case). The case 32) moves the workpiece W by moving relative to the first receiving portion 20 in the axial direction of the main shaft (front main shaft 115). In the work transfer device 30, the second receiving part (first case 31, second case 32) has positioning parts (inner surfaces 31e, 32e) for positioning the work W, and positioning parts (inner surfaces 31e, 32e). Positions the work 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).

  Accordingly, when the second receiving section (the first case 31 and the second case 32) delivered with the work W from the first receiving section 20 moves relatively to the first receiving section 20, the stopper section 21a. The work W can be positioned at a position where it does not interfere with. Therefore, the work W can be smoothly transferred and conveyed from the first receiving unit 20 to the second receiving unit (the first case 31, the second case 32).

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

  In the work transfer device 30 of the first embodiment, the positioning portions (inner surfaces 31e, 32e) are the inner surfaces (inner surfaces 31e, 32e) of the cylindrical case (FIG. 7).

  This makes it possible to prevent the work W from dropping from the cylindrical case when the positioning portions (inner surfaces 31e, 32e) are swung on a plane perpendicular to the axial direction of the spindle (front spindle 115). Further, it is possible to prevent cutting chips and cutting water from entering the positioning portions (inner surfaces 31e, 32e) during processing of the work W.

  In the work transfer device 30 of the first embodiment, the second receiving portion (the first case 31 and the second case 32) has the wall portion (first left wall 31b, second wall) at the end of the positioning portion (inner surface 31e, 32e). It has a left wall 32b) (Fig. 6).

  Thereby, when the second receiving portion (first case 31, second case 32) moves from the receiving position P2 to the retracted position P1, the work W is prevented from dropping from the positioning portion (inner surfaces 31e, 32e). To prevent.

  The work transfer 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 allowed without departing from the gist of the invention according to each claim of the claims.

  In the first embodiment, the first case main body 31a and the second case main body 32a are formed as semi-cylindrical shapes as the recesses formed along the axial direction of the back main shaft 215. However, in the first case main body 31a and the second case main body 32a, the recess formed along the axial direction of the back main shaft 215 may have a V-shaped groove shape in a cross section perpendicular to the Z-axis direction.

  In the first embodiment, an example in which the present invention is applied to a machine tool including the front spindle 115 and the back spindle 215 is shown. However, the present invention can be applied to a machine tool having a plurality of spindles.

  In the first embodiment, an example in which one work recovery 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 through which cutting oil escapes. However, you may provide the 1st receiving part main body, the 1st case main body, and the 2nd case main body with the through-hole which escapes cutting oil.

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

  In the first embodiment, an example in which the present invention is applied to an automatic lathe device has been shown. However, the present invention can be applied to other cutting machines and machine tools such as polishing machines and special processing machines such as electric discharge machines.

DESCRIPTION OF SYMBOLS 1 Machine tool 20 1st receiving part 21a Stopper part 30 Work transfer device 31 1st case (an example of 2nd receiving part)
31b First left wall (an example of a wall portion)
31e Inner surface (an example of a positioning portion)
32 2nd case (an example of 2nd receiving part)
32b 2nd left wall (an example of a wall part)
32e inner surface (an example of a positioning portion)
115 Front spindle (an example of spindle)
P1 Evacuation position P2 Receiving position W Work

Claims (4)

A first receiving portion for receiving the work held by the spindle,
A second receiving unit for receiving the work from the first receiving unit,
The first receiving portion includes a stopper portion that prevents the work from dropping from the end surface of the first receiving portion,
By the rotation of the first receiving portion, the work drops from the opening of the peripheral surface of the first receiving portion and is delivered to the second receiving portion.
A work transfer device that transfers the work by moving the second receiving part relative to the first receiving part in the axial direction of the main shaft,
The second receiving unit has a positioning unit that positions the work,
The work transfer device, wherein the positioning part positions the work at a position where it does not interfere with the stopper part when the second receiving part moves relative to the first receiving part. The work transfer device according to claim 1, wherein the positioning portion is a recess extending along an axial direction of the main shaft. The work transfer device according to claim 1 or 2, wherein the positioning portion is an inner surface of a cylindrical case. 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.