JP2006007408A - Machining apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machining apparatus which can supply electric power to a driving means for driving a workpiece without disturbing the rotation of a main spindle. <P>SOLUTION: The inside of the main spindle 31 is hollow. Cables 36 are arranged inside the main spindle 31 such that one end of the cable 36 is connected to a motor 341 of a driving means 34 or a measuring section 35, and the other end of the cable 36 is connected to a contact point 314A. The contact point 314A is wound around the outer peripheral surface of the small-diameter portion 311B of the main spindle 31, and is brought into contact with the end portion of a power source cable 40. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a processing apparatus.

2. Description of the Related Art Conventionally, a mold for manufacturing a workpiece having a plurality of recesses, for example, a lens array in which small lenses are arranged in a matrix is known.
When manufacturing such a workpiece, the workpiece is attached to a rotating main shaft, and the surface of the workpiece is ground and cut by a processing means disposed opposite to the main shaft.
The workpiece is fixed to a table (sliding part) that can move in two directions perpendicular to the rotation axis of the main shaft, and this table is driven by driving means to form a plurality of recesses sequentially. (For example, refer to Patent Document 1).
As the driving means for driving the table, for example, a motor is used, and the driving of the table is automated.

JP-A-11-179601 (pages 3 to 5, FIG. 1)

  When the table is driven by driving means including a motor or the like as in Patent Document 1, it is necessary to supply power to the driving means. However, Patent Document 1 does not disclose a power supply structure at all. Here, for example, a method of simply connecting a power supply cable or the like to the motor is conceivable. In this case, the cable may be entangled with the rotation of the main shaft, and the rotation of the main shaft is hindered. That's not realistic.

  An object of the present invention is to provide a machining apparatus capable of supplying electric power to a driving means for driving a workpiece without obstructing rotation of a main shaft.

The processing apparatus of the present invention includes a main shaft that rotates about a rotation axis, a sliding portion that holds a workpiece and slides on an end surface that intersects the rotation axis of the main shaft, and drives the sliding portion. And a driving means that rotates as the main shaft rotates, and a processing means that processes the workpiece, and a power supply means that supplies power to the driving means is disposed inside the main shaft. It is characterized by being.
Here, the power supply means may be, for example, a cable connected to a power source, or may be a power source itself such as a battery.
According to the present invention, since the power supply means for supplying power to the drive means is arranged inside the main shaft, the power supply means also rotates as the main shaft rotates. Therefore, since the power supply means does not hinder the rotation of the main shaft, the workpiece can be processed smoothly.

At this time, the power supply means is a cable having one end connected to the driving means, and the other end of the cable is exposed to the outer peripheral surface of the main shaft and has a conductive contact provided on the outer peripheral surface of the main shaft. It is preferable to be connected to a power cable connected to a power source.
In the present invention, the other end of the cable is connected to the power source via the contact and the power cable.
According to the present invention, the cable serving as the power supply means is arranged in the main shaft, so that the cable does not get tangled even if the main shaft rotates. Moreover, since a cable is not exposed by arrange | positioning a cable in a main axis | shaft, the external appearance of a processing apparatus can be made favorable.

Further, in the present invention, the conductive contact is wound in a circumferential shape along the outer peripheral surface of the main shaft, and the end portion of the power cable is rotated along with the rotation of the main shaft in a state where the main shaft is rotated. It is preferable that the contact point slides on the rotating contact point and always contacts the contact point.
In the present invention, since the contact is wound in a circumferential shape along the outer peripheral surface of the main shaft, the tip of the power cable slides on the contact while contacting the contact when the main shaft is rotated. Become. Thereby, in a state where the power cable rotates the main shaft, the contact always comes into contact with the contact point, and power is always supplied to the driving means. Therefore, it is not necessary to start and stop the supply of electric power, and the driving of the sliding portion holding the workpiece by the driving means can be performed smoothly.

In the present invention, the power cable may be in contact with the contact point only when the main shaft stops rotating.
In the present invention, since electric power is supplied to the drive unit only when the main shaft stops rotating, the drive unit is not erroneously driven during rotation of the main shaft. Further, energy saving can be achieved as compared with the case where electric power is constantly supplied.

Further, in the present invention, a measuring unit for measuring the sliding amount of the sliding unit, and one end connected to the measuring unit, the other end exposed to the outer peripheral surface of the main shaft, and the conductivity provided on the outer peripheral surface of the main shaft. And a power cable connected to the power source is connected to the contact, and the power cable stops the rotation of the main shaft. It is preferable that the measurement unit includes a storage unit having a non-volatile memory that stores the sliding amount of the sliding unit.
In the present invention, the other end of the cable connected to the measuring unit is connected to the power source via the contact and the power cable.
If the sliding amount of the sliding part stored in the storage unit is lost when the power supply is stopped, the spindle is rotated and processed (the power to the measuring unit and the driving means). After stopping the supply of), when processing again, the sliding part must be returned to the origin position, and the sliding part must be slid according to the distance from the origin position to the next machining point, Processing takes time.
On the other hand, in the present invention, the measurement unit includes a storage unit having a non-volatile memory that stores the sliding amount of the sliding unit. Therefore, even if the supply of power to the measurement unit is stopped, the measurement unit stores the storage unit. The sliding amount of the sliding portion is not lost. Therefore, after rotating the spindle and performing processing (after stopping the supply of power to the measurement unit and the driving means), when performing processing again, based on the sliding amount stored in the storage unit, Since the driving means can be driven, the processing time can be shortened.

In the present invention, a control unit that controls the driving of the driving unit is provided, and a control signal line having one end connected to the control unit and the other end connected to the driving unit is disposed inside the main shaft. It is preferable.
According to the present invention as described above, since the control signal line is arranged inside the main shaft, the control signal line is not exposed and the appearance of the processing apparatus can be improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a lens array 1. Specifically, FIG. 1A is a diagram of the lens array 1 viewed from the front, FIG. 1B is a diagram of the lens array 1 viewed from the side, and FIG. It is the figure which looked at from the side different from FIG. 1 (B).
The lens array 1 is mounted on an optical device such as a projector or a laser printer, and includes a base unit 11 and a lens unit 12.
The base portion 11 is formed as a rectangular plate-like body, and a lens portion 12 is formed on one surface. Moreover, the other surface of the base part 11 is substantially flat.
The lens unit 12 is formed so as to bulge out at a substantially central portion of one surface of the base unit 11, and includes a plurality of small lenses 121 that divide a light beam into a plurality of partial light beams.
The plurality of small lenses 121 are arranged in a matrix (for example, 6 rows × 4 columns, where rows are arranged in a row and columns are arranged in a row).
The small lens 121 may have a spherical shape or an aspherical shape.

Such a lens array 1 is manufactured by press-molding a molten glass lump 10 that is a molten optical material of the lens array 1 with a mold 2 as shown in FIG.
The mold 2 includes a fixed mold 21 and a movable mold 22 configured to be movable forward and backward with respect to the fixed mold 21.
The fixed mold 21 is a substantially rectangular plate, and includes a molding surface 211 that molds a substantially flat surface of the lens array 1.
The movable die 22 has a substantially rectangular shape, but a plurality of concave portions 222 corresponding to the small lenses 121 of the lens array 1 are arranged in a matrix on the molding surface 221.

The movable mold 22 of the mold 2 as described above is manufactured using the processing apparatus 3 as shown in FIGS.
The processing device 3 is attached to the main shaft 31 to which the master die 23 of the movable die 22 of the molding die 2 is attached, a processing portion 32 as a processing means for forming a recess 222 on the surface of the master die 23, and the main shaft 31. A jig 33 for holding the mother die 23 and positioning the mother die 23 on the main shaft 31, a driving means 34 for driving the sliding portion 330 of the jig 33, and a sliding portion 330 of the jig 33. And a power supply unit 36 (see FIG. 4) for supplying power to the drive unit 34 and the measurement unit 35.
Here, the mother die 23 refers to a state in which the concave portion 222 having a complete shape is not formed on the molding surface 221 of the movable die 22 and corresponds to the workpiece of the present invention.

The processing unit 32 of the processing device 3 includes a disc-type grindstone 321 as a tool, a grindstone shaft 322 to which the disc-type grindstone 321 is attached at the tip, and a motor 323 that rotates the grindstone shaft 322.
In addition, although the process part 32 of this embodiment is equipped with the disk type grindstone 321 and grinds the surface of the mother die 23 and forms the recessed part 222, it is not restricted to this, A process part is a disk type grindstone 321. Instead, a cutting tool may be provided.
The grindstone shaft 322 is movable in two directions orthogonal to the advance / retreat direction of the main shaft 31, that is, the Y-axis direction and the X-axis direction. Further, the axial direction of the grindstone shaft 322 and the Y-axis direction are parallel.

The main shaft 31 is formed in a columnar shape extending toward the processing portion 32 side, and a jig 33 to which the mother die 23 is attached is fixed to the tip side located on the processing portion 32 side.
The main shaft 31 is hollow and has a large-diameter portion 311A located on the front end side, and a small-diameter portion 311B located on the rear end side and having a diameter smaller than that of the large-diameter portion 311A. Part of the small diameter portion 311B and the large diameter portion 311A is covered with a hollow support 37. A bearing (not shown) is disposed in the support body 37, and the small diameter portion 311B of the main shaft 31 is supported by this bearing. The main shaft 31 can advance and retract in the Z-axis direction, and the large diameter portion 311A advances and retracts toward the processing portion 32.

A main shaft motor 313 is connected to the rear end portion of the small diameter portion 311B of the main shaft 31 via a coupling 315. The main shaft 31 is rotated by driving the main shaft motor 313. That is, the main shaft 31 is configured to be rotatable in the direction of the arrow R1 or the counter arrow R1 with the central axis passing through the center of the circular surface of the large diameter portion 311A to which the jig 33 is fixed as the rotation axis 312. Yes. The rotation shaft 312 of the main shaft 31 is parallel to the Z axis. Further, a rotary encoder (not shown) is attached to the rear end portion of the main shaft 31 to detect the rotation angle of the main shaft 31.
A contact 314A is provided on the outer peripheral surface of the small diameter portion 311B in front of the coupling 315 of the main shaft 31. The contact 314A is for connecting a cable 36, which will be described later, and the power cable 40, and is made of a conductive material, for example, metal. The contact 314A has a cylindrical shape and is wound in a circumferential shape along the outer peripheral surface of the small diameter portion 311B of the main shaft 31.

The jig 33 is attached to an end surface orthogonal to the rotation shaft 312 of the small diameter portion 311B of the main shaft 31. The jig 33 is for moving the mother die 23 in a direction substantially orthogonal to the rotation shaft 312 of the main shaft 31 to position the mother die 23. The base 331, which is attached to the main shaft 31, and the base 331 And a sliding portion 330 provided on the surface.
The base 331 has a substantially rectangular shape when viewed from the Z-axis direction. A groove portion 331A extending along the Y-axis direction and recessed toward the main shaft 31 is formed on the surface of the base portion 331 on the sliding portion 330 side.
The sliding portion 330 holds the mother die 23 and slides on an end surface orthogonal to the rotation shaft 312 of the small diameter portion 311B of the main shaft 31. The sliding portion 330 includes a Y stage 332 that slides along the Y-axis direction on the base 331 fixed to the main shaft 31, an X stage 333 that slides along the X-axis direction on the Y stage 332, and And an attachment portion 334 fixed on the X stage 333.
The sliding part 330 of the present embodiment is configured such that the Y stage 332 and the X stage 333 slide on the main shaft 31 via the base 331.

Similarly to the base 331, the Y stage 332 has a substantially rectangular plane shape. A rail portion 332A that extends along the Y-axis direction and protrudes toward the base portion 331 is formed on the surface of the Y stage 332 on the base portion 331 side. The rail portion 332A is fitted into the groove portion 331A of the base portion 331 and slides in the groove portion 331A. Further, a groove portion 332B extending in the X-axis direction is formed on the surface of the Y stage 332 on the X stage 333 side.
Similarly to the Y stage 332 and the base portion 331, the X stage 333 has a planar rectangular shape. A rail portion 333A that extends along the X-axis direction and protrudes toward the Y stage 332 is formed on the surface of the X stage 333 on the Y stage 332 side. The rail portion 333A is fitted into the groove portion 332B of the Y stage and slides in the groove portion 332B.
The attachment portion 334 has a disk shape, and the mother die 23 is attached to a surface (attachment surface) opposite to the X stage 333 among a pair of opposing circular surfaces. A fixing member 335 for fixing the mother die 23 is installed on the mounting surface of the mounting portion 334.

The drive means 34 is for driving the Y stage 332 and the X stage 333 of the jig 33, and has an X stage drive unit 34X and a Y stage drive unit 34Y.
The Y stage driving unit 34Y includes a motor 341, a fixing unit 342 that fixes the motor 341, a ball screw 343 that is rotationally driven by the motor 341, and a screwing unit 344 into which the ball screw 343 is screwed.
The motor 341 is fixed to a fixing part 342 attached to a side surface of the base 331 parallel to the sliding direction of the Y stage 332. The motor 341 is, for example, a DC (direct current) motor.

A through hole is formed in the fixed portion 342, and a ball screw 343 is inserted into the through hole.
The longitudinal direction of the ball screw 343 is arranged along the sliding direction of the Y stage 332, and the base end side is connected to the rotation shaft of the motor 341. Further, a screwing portion 344 fixed to a side surface along the sliding direction of the Y stage 332 is screwed onto the tip side of the ball screw 343.
When the ball screw 343 is driven by the motor 341, the ball screw 343 rotates and the Y stage 332 is driven in the Y-axis direction.

The X stage drive unit 34X has the same configuration as the Y stage drive unit 34Y. The motor 341 is fixed by a fixing unit 342 attached to a side surface orthogonal to the sliding direction of the Y stage 332, and is rotated by the motor 341. A ball screw 343 that is fixed to the X stage 333, and a screwing portion 344 into which the tip of the ball screw 343 is screwed.
The longitudinal direction of the ball screw 343 is arranged along the sliding direction of the X stage 333, and the screwing portion 344 is fixed to a side surface along the sliding direction of the X stage 333.

The measuring unit 35 is for measuring the sliding amount of the jig 33. The Y stage measuring unit 35Y that measures the sliding amount of the Y stage 332 and the X stage measuring unit 35X that measures the sliding amount of the X stage 333 are used. With.
The Y stage measurement unit 35Y is a rotary encoder that is attached to the rotation shaft of the motor 341 of the Y stage drive unit 34Y and detects angular displacement of the rotation shaft. A pulse signal is output from the Y stage measurement unit 35Y as the rotation shaft of the motor 341 rotates, and this pulse signal is transmitted to the control unit 38 of the machining apparatus 3.
The X stage measurement unit 35X has the same configuration as the Y stage measurement unit 35Y, and is a rotary encoder that detects the angular displacement of the rotation shaft of the motor 341.

The control unit 38 is for controlling the driving of the motor 341, and includes a control unit main body 381 and a storage unit 382.
The control unit main body 381 includes a counter 381A, a determination unit 381B, an origin position return unit 381C, and a drive control unit 381D.
The counter 381A receives the pulse signals from the Y stage measurement unit 35Y and the X stage measurement unit 35X, and sequentially adds and subtracts the number of pulses of the pulse signal.
The determination unit 381B calculates the amount of movement from the origin position of the stages 332 and 333 based on the number of pulses counted by the counter 381A, and the amount of movement and the respective stages 332 and 333 stored in the storage unit 382 in advance. Compare the design movement from the origin position. Then, a deviation of the movement amount is obtained, and it is determined whether or not the deviation is a predetermined value or more.

The drive control unit 381D generates a signal for driving the motor 341 when the deviation is equal to or greater than a predetermined value by the determination unit 381B. When the deviation is less than a predetermined value, a signal for stopping the motor 341 is generated. Further, even when a command for driving the motor 341 is input from the outside, a signal for starting the driving of the motor 341 is generated.
The origin position return unit 381C is for returning each stage 332, 333 to the origin position when an origin return command is input from the outside after the processing apparatus 3 is powered on. In other words, the origin position return unit 381C is configured to dispose the screwing part 344 fixed to the Y stage 332 and the X stage 333 at a predetermined point (origin position) on the ball screw 343.

The storage unit 382 includes a count value storage unit 382A and a set value storage unit 382B.
The count value storage unit 382A sequentially stores the count value of the number of pulses of the pulse signal counted by the counter 381A.
The set value storage unit 382B stores design movement amounts (set values) from the origins of the stages 332 and 333 when the recesses 222 are processed. When each stage 332, 333 is moved from the origin position based on this set value, a position serving as the processing center of the recess 222 (a position corresponding to the optical center of the small lens 121 of the lens array 1) and the rotation shaft 312 are obtained. Match.

In such a control unit 38, pulse signals from the Y stage measurement unit 35Y and the X stage measurement unit 35X are received, and the number of pulses of the pulse signal is sequentially added and subtracted by the counter 381A and stored in the count value storage unit 382A.
Then, the determination unit 381B reads the count value from the count value storage unit 382A, and calculates the movement amount of each stage 332, 333 based on the count value. Further, the movement amount of each stage 332, 333 set in advance from the setting value storage unit 382B is read and compared with the movement amount of each stage 332, 333 based on the count value. Then, the deviation of the movement amount is obtained, and it is determined whether or not it is a predetermined value or more.
When the value is equal to or greater than the predetermined value, the drive control unit 381D generates a signal for driving the motor 341 and outputs the signal to the motor 341. The motor 341 is driven based on this signal and rotates the ball screw 343 to move the Y stage 332 and the X stage 333 to the target position.

Electric power is supplied to the measurement unit 35 and the driving unit 34 as described above by the electric power supply unit 36. The power supply unit 36 is a cable 36 having one end connected to the motor 341 or the measuring unit 35 of the drive unit 34 and the other end connected to the power source 39 via the contact 314 </ b> A and the power cable 40. The cable 36 is disposed inside the main shaft 31, and an end connected to the motor 341 or the measuring unit 35 of the driving unit 34 is exposed from the large-diameter portion 311 </ b> A on the distal end side of the main shaft 31.
The power supply 39 also supplies power to the control unit 38.
The other end of the cable 36 is exposed to the outer peripheral surface of the main shaft 31 through a hole (not shown) formed in the small diameter portion 311B of the main shaft 31, and is a contact 314A attached to the outer peripheral surface of the small diameter portion 311B of the main shaft 31. It is connected to the. The end of the power cable 40 connected to the power source 39 is in contact with the contact 314A.

  In addition, not only the cable 36 but also a control signal line 41 for issuing a drive command to the motor 341 of the drive means 34 and a control signal for transmitting a signal from the measurement unit 35 to the control unit 38 inside the spindle 31. A line 41 is also arranged. These control signal lines 41 are also exposed from the outer peripheral surface of the small-diameter portion 311B of the main shaft 31, and are connected to a contact point 314B attached to the outer peripheral surface of the small-diameter portion 311B of the main shaft 31. The contact 314B is made of a conductive material, and is made of metal, for example. A control signal line 380 from the control unit 38 is connected to the contact 314B. The contact point 314B may be wound around the outer peripheral surface of the main shaft 31 like the contact point 314A, and a control signal line 380 from the control unit 38 may be provided like a jack. The structure which fits may be sufficient. In the case where the control signal line 380 from the control unit 38 is fitted, such as a jack, the rotation of the main shaft 31 is stopped, and communication between the control unit 38 and the drive unit 34 and / or the measurement unit 35 is performed. The control signal line 380 may be fitted into a jack or the like only when performing the above.

Next, the processing method of the recessed part 222 using such a processing apparatus 3 is demonstrated.
When a power switch (not shown) of the processing apparatus 3 is turned on, power is supplied from the power source 39 via the power cable 40. The power cable 40 is connected to the contact point 314A. Since the cable 36 is connected to the contact point 314A, electric power is supplied to the motor 341 and the measurement unit 35 of the driving unit 34 via the cable 36.
When the operator operates a predetermined switch, an origin return command is input to the control unit 38, and driving is performed from the origin position return unit 381C of the control unit 38 via the control signal line 380, the contact 314B, and the control signal line 41. A signal is sent to the motor 341 of the means 34. Based on this signal, the motor 341 rotates, the Y stage 332 and the X stage 333 slide, and the stages 332 and 333 are arranged at the origin positions.
Here, when the stages 332 and 333 are installed at the origin positions, the outer shape center of the portion of the lens array 1 on the surface of the matrix 23 on the stages 332 and 333 that forms the small lens 121 and the rotation axis of the main shaft 31. 312 matches.

Next, when the operator operates a predetermined switch, a command for driving the motor 341 is input, and the motor 341 of the driving unit 34 is supplied from the drive control unit 381D via the control signal line 380, the contact 314B, and the control signal line 41. The drive start signal is output at Based on this signal, the motor 341 rotates and the Y stage 332 and the X stage 333 slide.
Then, a pulse signal based on the rotation of the motor 341 is output from the measuring unit 35, and this pulse signal is sent to the control unit 38 of the processing apparatus 3 via the control signal line 41, the contact 314 </ b> B, and the control signal line 380. The counter 381A of the control unit 38 counts the number of pulses of the pulse signal, sequentially adds and subtracts it, and stores it in the count value storage unit 382A.

The determination unit 381B reads the count value from the count value storage unit 382A, and calculates the movement amounts of the stages 332 and 333 based on the count value. Further, the preset movement amounts of the stages 332 and 333 are read from the setting value storage unit 382B and compared with the movement amounts of the stages 332 and 333 based on the count value. Then, the deviation of the movement amount is obtained, and it is determined whether or not it is a predetermined value or more.
When the value is equal to or greater than the predetermined value, the drive control unit 381D generates a signal for driving the motor 341 and outputs the signal to the motor 341. The motor 341 is driven based on this signal, rotates the ball screw 343, and the Y stage 332 and the X stage 333 slide. The Y stage 332 and the X stage 333 slide until the deviation becomes less than a predetermined value.
When the deviation is less than the predetermined value, a signal for stopping the driving of the motor 341 is generated by the drive control unit 381D, and the driving of the motor 341 is stopped. As a result, the position serving as the processing center of the recess 222 (the position corresponding to the optical center of the small lens 121 of the lens array 1) coincides with the rotation shaft 312.

  Next, when the Y stage 332 and the X stage 333 are arranged at predetermined positions, the main shaft 31 is driven to rotate by the motor 313, and the grindstone shaft 322 of the processing unit 32 is driven to rotate, while the first recess is formed in the master block 23. 222 is processed. At this time, the cable 36 and the control signal line 41 arranged in the main shaft 31 rotate together with the main shaft 31. Further, the contacts 314A and 314B attached to the outer peripheral surface of the main shaft 31 also rotate. The power cable 40 and the control signal line 380 connected to the contacts 314A and 314B slide on the rotating contacts 314A and 314B, and the main shaft 31 is rotated in the power cable 40 and the control signal line 380. In the meantime, the contacts 314A and 314B are always contacted.

When the processing of the recess 222 is completed, the operator operates a predetermined switch. Then, an instruction to drive the motor 341 again is input, a drive start signal is generated by the drive control unit 381D, and is output to the motor 341 of the drive unit 34 via the control signal line 380, the contact 314B, and the control signal line 41. The Based on this signal, the motor 341 rotates again, and the Y stage 332 and the X stage 333 slide. As in the case of processing the first recess 222, a pulse signal based on the rotation of the motor 341 is output from the measurement unit 35, and the number of pulses is counted by the counter 381A. At this time, since the count value when the first recess 222 is processed is stored in the count value storage unit 382A of the storage unit 382, the counter 381A includes the newly acquired number of pulses as the count value. Add and subtract.
Then, in the same manner as when the first concave portion 222 is processed, a position serving as the processing center of the second concave portion 222 (a position corresponding to the optical center of the small lens 121 of the lens array 1), and the rotation shaft 312. To match.
By repeating the above operation, all the concave portions 222 are formed in the mother die 23.

Therefore, according to this embodiment, the following effects can be produced.
(1) Since the cable 36 for supplying power to the motor 341 and the measuring unit 35 and the control signal line 41 are arranged inside the main shaft 31, the cable 36 and the control signal line 41 also rotate as the main shaft 31 rotates. Will be. Therefore, even if the main shaft 31 rotates, the cable 36 and the control signal line 41 are not entangled. Therefore, the cable 36 and the control signal line 41 can smoothly process the concave portion 222 of the mother die 23 without preventing the rotation of the main shaft 31.

(2) Further, since the cable 36 and the control signal line 41 are arranged in the main shaft 31, the cable 36 and the control signal line 41 are not exposed, so that the appearance of the processing apparatus 3 can be improved.

(3) Since the contact 314A between the cable 36 and the power cable 40 and the contact 314B between the control signal lines 380 and 41 are wound around the outer peripheral surface of the main shaft 31, the main shaft 31 is rotated. Then, the tip ends of the power cable 40 and the control signal line 380 slide on the contacts 314A and 314B while contacting the contacts 314A and 314B. Since the power cable 40 and the control signal line 380 are always in contact with the contacts 314A and 314B in a state where the main shaft 31 is rotated, the power supply start and stop operations, the connection between the control signal lines 380 and 41, and the non-connection No operation is required, and the recess 222 can be processed quickly.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the embodiment, the control signal line 41 is disposed inside the main shaft 31, but the control signal line 41 may not be disposed inside the main shaft 31.

In the embodiment, the power cable 40 is connected to the cable 36 via the contact point 314A while the main shaft 31 is rotating. However, the present invention is not limited to this, and the main shaft 31 is stopped. Only the power cable 40 and the cable 36 may be connected. For example, the power cable 40 and the cable 36 may be connected by a jack as a contact, and the connection between the jack and the power cable 40 may be released while the main shaft 31 rotates. By doing in this way, in the state where the main shaft 31 rotates, the power cable 40 is not connected to a jack attached to the main shaft 31, so that the power cable 40 is not entangled.
In addition, since electric power is supplied to the motor 314 and the measuring unit 35 only when the main shaft 31 stops rotating, the motor 314 and the like are not erroneously driven while the main shaft 31 is rotating. Furthermore, since electric power is supplied to the motor 314 and the measuring unit 35 only when the main shaft 31 stops rotating, energy saving can be achieved as compared with the case where the main shaft 31 is always supplied.

  Further, in the above embodiment, the count value storage unit 382A of the storage unit 382 of the control unit 38 stores the count value of the number of pulses of the pulse signal counted by the counter 381A. After processing, when processing the second recess 222, the counter 381A is configured to add or subtract the number of pulses based on the count value stored in the count value storage unit 382A. It is good also as a structure which does not memorize | store the count value of the pulse number at the time of processing the 1st recessed part 222. FIG. In such a case, when the second recess 222 is formed, the origins of the stages 332 and 333 may be returned again. However, in such a case, it is necessary to return to the origin every time each recess 222 is processed, so that it takes time to process the recess 222. On the other hand, in the above-described embodiment, the return to origin only needs to be performed once after the power is turned on, so that no trouble is required for processing the recess 222.

Furthermore, in the embodiment, power is supplied to the motor 341 and the measuring unit 35 from the power source 39 via the power cable 40 and the cable 36. However, the present invention is not limited to this. As an alternative, a battery or the like may be arranged and power may be supplied from the battery or the like.
In the above embodiment, the contacts 314A and 314B are attached to the small diameter portion 311B of the main shaft 31, but may be attached to the tip portion exposed from the support 37 of the large diameter portion 311A as shown in FIG. By doing in this way, the length dimension of the cable 36 arrange | positioned inside the main axis | shaft 31 and the control signal wire | line 41 can be shortened.

Furthermore, in the above-described embodiment, the driving unit 34 includes the motor 341 such as a direct current (DC) motor, and the rotation of the motor 341 is detected by the measurement unit 35 with the rotary encoder. The position of each of the stages 332 and 333 may be detected by a linear encoder or the like.
In the above embodiment, the control unit 38 includes the counter 381A and the count value storage unit 382A. However, the present invention is not limited to this, and as shown in FIG. The function may be installed. In this case, the configuration of the control unit 38 ′ is a configuration in which the counter 381A and the count value storage unit 382A are excluded from the configuration of the control unit 38.
As described above, when the measurement unit 35 ′ is provided with the count value storage unit 382A, and when the power is not always supplied to the measurement unit 35 ′, the count value storage unit 382A is provided. It is preferable to use a nonvolatile memory or the like. Even if the supply of power to the measurement unit 35 ′ is stopped, the count value stored in the count value storage unit 382 A is not lost. For example, by rotating the spindle 31, After processing (after stopping the supply of power to the measuring unit 35 ′ and the motor 341), when performing processing again, the motor 341 is turned on based on the count value stored in the count value storage unit 382A. Since it can be driven, the processing time can be shortened.

In the embodiment, the sliding portion 330 that holds the master block 23 and slides on the main shaft 31 includes the X stage 333 and the Y stage 332, and the stages 332 and 333 are arranged on the rotation shaft of the main shaft 31. On the other hand, although it slides in the substantially orthogonal direction, the sliding direction of the sliding portion is not limited to this. For example, as shown in FIG. 7, the sliding part 330 ′ may slide in the direction of the arrow R3. 7 includes a base portion 331 ′ and a sliding portion 330 ′ that slides on the base portion 331 ′. The sliding portion 330 ′ includes a sliding portion main body 330A ′ and an attachment portion 334.
The surface of the base portion 331 ′ on the sliding portion 330 ′ side is recessed in an arc shape, and the surface of the sliding portion main body 330A ′ of the sliding portion 330 ′ on the base portion 331 ′ side protrudes in an arc shape. The sliding portion 330 ′ slides in the direction of the arrow R3 by sliding the arc-shaped protruding portion of the sliding portion main body 330A ′ of the sliding portion 330 ′ against the arc-shaped depression of the base portion 331 ′. It becomes.
Furthermore, the sliding portion may be a rotary stage that is driven to rotate on the main shaft 31 with an axis parallel to the rotation axis of the main shaft 31 as a rotation axis.
Moreover, in the said embodiment, although contact 314A, 314B was made into metal, it is not restricted to this. The material of the contact is arbitrary as long as it has conductivity.

  The present invention can be used in a processing apparatus for manufacturing a lens array mold.

The figure which shows the lens array concerning embodiment of this invention. Sectional drawing which shows the shaping | molding die of the said lens array. The perspective view which shows the processing machine for manufacturing a shaping | molding die Sectional drawing which shows the principal part of the said processing apparatus. Sectional drawing which shows the modification of the principal part of the said processing apparatus. The block diagram which shows the modification of the measurement part of the said processing apparatus. The perspective view which shows the modification of the jig | tool of the said processing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 23 ... Master shape (workpiece), 31 ... Main shaft, 32 ... Processing part (processing means), 330 ... Sliding part, 34 ... Driving means, 34X ... Stage drive part, 34Y ... Stage drive part, 35 ... Measuring part , 35 '... measurement unit, 39 ... power supply, 40 ... power cable, 41 ... control signal line, 312 ... rotating shaft, 314A ... contact, 314B ... contact, 380 ... control signal line, 382A ... count value storage unit (storage unit) )

Claims (6)

A main shaft that rotates about a rotation axis;
A sliding portion that holds the workpiece and slides on an end surface that intersects the rotation axis of the main shaft,
Driving means for driving the sliding portion and rotating with the rotation of the main shaft;
Processing means for processing the workpiece,
A machining apparatus, wherein power supply means for supplying power to the drive means is arranged inside the spindle. The processing apparatus according to claim 1,
The power supply means is a cable having one end connected to the drive means,
The other end of the cable is exposed to the outer peripheral surface of the main shaft, and is connected to a power cable connected to a power source through a conductive contact provided on the outer peripheral surface of the main shaft. The processing apparatus according to claim 2, wherein
The conductive contact is wound circumferentially along the outer peripheral surface of the main shaft,
An end portion of the power cable slides on the contact rotating with the rotation of the main shaft in a state where the main shaft is rotated, and is always in contact with the contact. The processing apparatus according to claim 2, wherein
The processing apparatus according to claim 1, wherein the power cable contacts the contact point only in a state where the main shaft stops rotating. The processing apparatus according to claim 4, wherein
A measuring unit for measuring the sliding amount of the sliding unit;
One end is connected to the measuring unit, the other end is exposed to the outer peripheral surface of the main shaft, and is connected to a conductive contact provided on the outer peripheral surface of the main shaft, and includes a cable disposed inside the main shaft,
A power cable connected to the power source is connected to the contact,
The power cable is in contact with the contact point only when the spindle stops rotating,
The processing unit includes a storage unit having a nonvolatile memory that stores a sliding amount of the sliding unit. In the processing apparatus in any one of Claim 1 to 5,
A control unit for controlling the driving of the driving means;
A processing apparatus in which a control signal line having one end connected to the control unit and the other end connected to the driving means is disposed inside the main shaft.

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