JP3203400B2 - Seesaw type work transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for transferring a work between two processing stations for processing a work in a state where the work is supported at its center by a work support.

[0002]

2. Description of the Related Art For example, in finishing a gear, a side surface of the gear is chamfered in a chamfering station, and then shaving is performed in a shaving station machine.
Since these processes are often performed continuously, depending on the finishing machine for the gears, these processing stations may be provided on both front and rear sides of one column of one machine. In this case, although the advantage of space saving can be obtained, there is no space for providing a transfer device for the work (gear) between the two processing stations, and it is difficult to automate the transfer.

A problem associated with transferring a work between processing stations in such a limited space exists between the various processing stations in addition to the above.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems and to provide a compact transfer apparatus capable of performing automatic transfer between processing stations in a limited space. Aim.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is as follows.
A device for transferring a work between two processing stations for processing a work in a state where the work is supported at its center by a work supporting portion, and extends between the two processing stations and is swingable by an intermediate horizontal axis. A supported guide rail, a carrier that moves on the guide rail,
A support having at least two recesses for placing a workpiece mounted on the carrier; and a drive unit for swinging the guide rail around the horizontal axis, wherein the drive unit includes When the carrier located at each end is moved to a) a raised position where the work can be transferred to the support by disengagement of the work support, and b) a position immediately below the work supported by the work support. This is achieved by a seesaw-type work transfer device characterized by swinging the guide rail so as to take a lowered position lower than the work so as not to contact the work.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an apparatus for transferring a workpiece between a chamfering station A and a shaving station B of a gear. This transfer device 1
Has an oscillating body 10 extending between two processing stations, and a guide rail 11 is provided on the upper surface of the oscillating body. The oscillating body 10 is supported at its center by a horizontal shaft 12 mounted on a machine base 20, and is oscillated about the horizontal axis by a driving unit 30. The driving device 30 includes two hydraulic cylinder piston devices 31 and 32 mounted on one side of the machine base 20 and the rocking body 10. The small-diameter reciprocating piston device 31 has a stroke corresponding to the vertical movement of the rocking body 10, and has a larger diameter piston device 3.
Reference numeral 2 denotes a single-acting type, which has a stroke corresponding to the horizontal position and the lowered position of the oscillating body 10. The raised position of the oscillating body 10 is obtained by driving the piston device 31 to project. The horizontal position of the oscillating body 10 is obtained by driving the piston device 32 to protrude and driving the piston device 31 backward so that the piston device 32 overcomes the retreating force of the piston device 31 and assumes the maximum projecting position. The lowered position of the rocking body 10 is such that the piston device 32
Is driven backward.

[0007] A carrier 40 is slidably mounted on the guide rail 11. The rocking body 10 further includes sprockets 13 and 14 at both ends, and a chain 15 is wound around these sprockets. A motor 16 and a transmission are coupled to the sprocket 14 to rotate the sprocket 14 forward and backward. The carrier 40 is fixed to one part of the chain 15 and the sprocket 14
Slides on the guide rail with the forward and reverse rotation of.

As shown in detail in FIG. 3, the carrier 40 has a support 41 mounted on an upper portion of a lower portion 44 guided by the guide rail 11, and the support 41 is spaced apart in the longitudinal direction of the guide rail. Recesses for receiving two workpieces 42, 4
3 is provided. These recesses 42, 43 are formed with an inner diameter slightly larger than the outer diameter of the gear so as to receive the gear. The support 41 is rotatably supported by the horizontal shaft 45 at a position below the recess 43 with respect to the lower portion 44, and is elastically supported by a coil spring 46 at a position below the recess 42.

On the side of the chamfering station A (left side in FIG. 1), the workpiece to be machined is
There is provided a supply device 110 for sending to the feeder. The supply device 110 includes an elevating body 112 supported by the machine base 20 and vertically moved by a cylinder piston device 111.
A sliding body 114 that reciprocates right and left in the figure by a cylinder piston device 113 is mounted on the elevating body 112.
The sliding body 114 has a concave receiving portion along the peripheral surface of the work, and the turning device 120 supported by the machine base 20 supplies the work to the sliding body at the position shown in the figure. The turning device 120 includes an arm 1 that turns around a turning shaft 121.
The work W is supported by the support portion 123 at the tip of the arm. The support portion 123 has a support shaft that moves forward and backward with respect to the central hole of the gear that is a work, and a receiving portion that supports the support shaft that has moved forward. The support portion 123 supports the work W by locking the support shaft to the center hole of the work when the arm is at the left side of the drawing, and rotates the arm to the right to place the work W on the slide 114. After placing, the lock is released from the work W and separated. The sliding body 114 is moved rightward from the illustrated position by the piston device 113 to a processing position indicated by a broken line. At that position, the workpiece W is supported by the workpiece holding unit 102 of the chamfering station A. Work holding part 1
Numeral 02 has a support shaft (work arbor) which advances and retreats with respect to a central hole of a gear which is a work, and a receiving portion which supports the support shaft which has advanced. The holding unit 102 supports the work W by locking a support shaft in a center hole of the work on the sliding body 114. The elevating body 112 is lowered by the operation of the piston device 111, and the work W supported by the work holding portion 102 is moved.
, And is moved leftward in the figure by the piston device 113, and is further raised by the piston device 111 to return to the position shown in the figure.

The positional relationship between the chamfering station and the carrier 40 is such that when the carrier 40 reaches the left end of the guide rail 11 and the swinging body 10 raises the left end, the concave portion 42 reaches a lower position where the concave portion 42 is almost in contact with the workpiece W. It has been like that. The work W is released by the work holding unit 102 when the carrier 40 is at this position.
It rests on the recess 42.

The shaving station B is located at the right end of the oscillating body 10 in FIG.
2 holds the work and the cutter 201 for shaving processing.
Performs shaving of the teeth of the work W. Holder 20
Reference numeral 2 has a support shaft (work arbor) which advances and retreats with respect to a central hole of a gear which is a work, and a receiving portion which supports the support shaft which has advanced. The holding unit 202 supports the work W by engaging with a center hole of the work supported by the carrier 40 on the guide rail 11. A cutter 201 to be described later is provided at a position below the holding portion 202 on the guide rail 11.
Limit switch 2 for adjusting the engagement between the workpiece and workpiece
03 is provided.

A discharge device 210 is provided on the right side of the shaving station in FIG. Discharge device 21
Reference numeral 0 denotes an upper end of an elevating body 211 supported by the machine base 20 for elevating and lowering, to which an arm 213 that rotates in a range of about 180 ° around an axis 212 along the plane of FIG. is there. The distal end of the arm 213 is provided with a support portion 214 having a support shaft that advances and retreats with respect to the center hole of the gear as a work, and a receiving portion that supports the support shaft that has advanced. The elevating body 211 is in the lowered position and the arm 213 is in the position shown in FIG.
Is the pick-up position of the workpiece W. The elevating body 212 rises from this position, and the arm 213
Is rotated clockwise by approximately 180 °, and at the position where the elevating body 211 is lowered again, the work W is received and carried out by a carrying-out device (not shown). The work is supported and released by the discharge device 210 by the work support shaft of the support part 214 moving forward and entering the center hole of the work W, and the support shaft retreating and coming out of the shaft hole of the work W. Done.

The positioning of the carrier 40 is performed by NC control of an AC servomotor that drives the sprocket 14, and stops at the following stop positions.

Stop position A: left end of guide rail 11 (here, concave portion 42 of support 41 takes a position below work W in the chamfering station) Stop position B: near right end of guide rail 11 (here, ,
The recess 43 of the support assumes a position below the cutter of the shaving station B. Stop position C: right end of the guide rail 11 (here, the concave portions 42 and 43 of the support take the positions below the cutter of the shaving processing station B and the support portion 214 turned to the left, respectively). Further, a control unit for controlling operations described below is provided (not shown).

Hereinafter, the operation of the transfer device will be described with reference to FIG. 2 in steps a1 to a9.

[0016] Step a1) by shaving station cutter 201 B, shaving of the workpiece W ₁ is performed, chamfering of the work W ₂ is performed by chamfering station cutter 101 in A. The work is held at the holding unit 20 at each processing station
2, 102 are supported by being locked in the shaft holes. A work W ₃ to is then processed and is supported by the sliding body 114 of the feeder in the chamfering station A. The rocking body 10 is in a horizontal state, and the carrier 40 is the guide rail 1
1, it is located slightly to the right of the horizontal axis 10 of the oscillator, and the recesses 42 and 43 are empty.

Step a2) When machining at the chamfering machining station A is completed, a machining end signal is issued to the control device, and based on this, the AC servomotor for driving the sprocket 14 is driven, and the chain 15 (shown in FIG. 2). ), The carrier 40 moves to the left. When a position sensor (not shown) detects that the carrier 40 has passed the center of the guide rail 11 (near the horizontal axis 12), the control device issues a drive signal for a drive motor of the rocking body 10, and Rotates to lower its left end. Carrier 40 is stopped reaches the left end of the guide rail 11, this time, the recess 42 takes the position directly below the workpiece W _2.

[0018] Step a3) then the controller issues a drive signal so as to clockwise the oscillator 10, rotation of the oscillator 10 when the recess 42 of the carrier 40 has reached substantially in contact nearest position to the workpiece W ₂ is Stop. This stop is performed based on a signal from a position sensor such as a limit switch that is activated by contact with the oscillator. Workpiece W ₂ of chamfering station A in this state is released from the support by the holding portion 102, rests on the recess 42.

Step a4) When the holding unit 102 releases the work, the control unit issues a drive signal to the drive motor of the sprocket 14 based on a signal that the work is released, and the carrier 4
0 moves rightward along with the chain 15. Work W
The engagement between the cutter ₂ and the cutter 101 is released by the work freely rotating in the concave portion 42 as the carrier 40 moves.

Step a5) When it is detected that the carrier 40 has passed through the center of the guide rail 11, the control device issues a drive signal to rotate the rocking body 10 clockwise. Thus, the right end of the guide rail 11 downward to the carrier 40 recess 43 to stop reaches the position directly below the workpiece W _1. Machining of the workpiece W ₁ is completed in the meantime, the cutter 20
1 stops.

Step a6) When the carrier 40 stops,
The control device issues a drive signal to rotate the rocking body 10 counterclockwise.
Thus, the carrier 40 is increased, the rotation of the oscillator 10 is stopped when the recess 43 has reached substantially in contact nearest position to the workpiece W _1. Then holding unit 202 releases the workpiece W _1, the workpiece W ₁ rests on the recess 43. During this time, Te is at the chamfering station A, the workpiece W ₃ which has been supported in the sliding body 114 is transferred to the holding portion 102 for processing.

Step a7) When it is detected that the holding section 202 of the shaving station B has released the work, the control device issues a drive signal to the drive motor of the sprocket 14, and the carrier 40 is further moved along with the chain 15. Move to the right. At this time, the engagement between the work W ₂ and the cutter 201 is released by the work freely rotating in the concave portion 42 as the carrier 40 moves. Movement of the carrier 40, the workpiece W ₂ on the recesses 42 is stopped at the position meshed with cutter 201. If this engagement is not performed properly, the workpiece is pushed down by the cutter 201, and the support 41 of the carrier 40 moves downward against the spring 46 accordingly. As a result, it is detected that the limit switch 203 (see FIG. 3) is operated and the meshing is not properly performed. Based on this detection signal, the motor 16 rotates, the carrier 40 is slightly retracted, and the cutter 201 is rotated slowly and then advanced again. The operation for this meshing adjustment is
Repeat until proper engagement is obtained. Processing of chamfering station A, the work W ₃ is started during this period.

[0023] Step a8) carrier 40 is stopped at the proper position, the controller issues a drive signal, the workpiece W ₂ is supported by the holding portion 202, the workpiece W ₁ is supported on the recess 43 by the support portion 214 of the discharge device Is done. New workpiece W ₄ is mounted to the sliding body 114 in chamfering station A during this time.

Step a9) When it is detected at the shaving station B that the support section 202 has supported the work, the control device issues a drive signal to rotate the rocking body 10 clockwise, and stops at the position where the right end thereof is lowered. Let it. Based on the detection of the stop, the control device drives the sprocket 14, and the carrier 40 moves to the left along with the chain 15.

Step a10) When it is detected that the carrier 40 has reached the vicinity of the center of the guide rail 11, the control device issues a drive signal and rotates the rocking body 10 counterclockwise so as to be horizontal. Supporting portion 214 of the discharge device discharges the workpiece W ₁ rotates to the right. This reaches the state of step a1, and the above-described steps are repeated.

In the above example, the two types of machining on the workpiece are a combination of chamfering and shaving. However, the present invention also provides other types of rotation such as a combination of gear cutting and chamfering. The present invention is advantageously applied to the processing of the accompanying workpiece, and can be applied to various other types of processing. Also,
The work may be of various forms such as a work having a central hole (axial hole), a work having a central axis, a flat work, and the like. The holding unit in the processing station has an appropriate form, such as one that grips the central axis according to the object to be processed, one that supports the center by pushing the center part from both sides with a tailstock, or the like.

[0027]

According to the present invention, a carrier having a work mounting concave portion is moved on a guide rail which swings between two working stations, and the work is received at a position immediately below the work in the working station. When reaching the receiving position, the carrier takes a lowered position by swinging of the guide rail so that the peripheral edge of the concave portion of the carrier does not contact the work. As described above, since the transfer of the work is performed by combining the swing of the guide rail and the sliding of the carrier, the automatic transfer can be performed by a compact mechanism without complicating the processing machine. In addition, this allows the work to be mounted and processed at the two processing stations to be simultaneously performed in parallel, thereby improving work efficiency. Further, when the work is a gear, the carrier is repeatedly moved forward and backward until the engagement with the machining tool is obtained, and during this time, if the machining tool is slightly rotated, the gear meshes with the teeth of the machining tool. Can be easily performed, and automation is also easy.

[Brief description of the drawings]

FIG. 1 is a front view showing a transfer device according to an embodiment of the present invention together with a chamfering station and a shaving station.

FIG. 2 is an explanatory diagram for explaining an operation of the transfer device shown in FIG. 1;

FIG. 3 is a front view showing a carrier in the device shown in FIG.

[Explanation of symbols]

 Reference Signs List A chamfering processing station B shaving processing station W work 1 transfer device 10 oscillating body 11 guide rail 12 horizontal axis 13, 14 sprocket 15 chain 20 machine base 30 drive unit 40 carrier 41 support body 42, 43 recessed part 101 chamfering cutter 120 feeder 201 Shaving cutter 210 Ejector

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65G 25/00-25/12 B23F 23/04 B23Q 7/08 B23Q 39/04

Claims (1)

(57) [Claims] An apparatus for transferring a work between two processing stations for processing a work in a state where the work is supported at a center portion thereof by a work support portion, wherein the apparatus extends between the two processing stations and has an intermediate horizontal shaft. A guide rail that is swingably supported by a carrier, a carrier that moves on the guide rail, a support body having two or more recesses for placing a work mounted on the carrier, and the guide rail. A drive unit that swings around the horizontal axis,
The drive unit includes: a carrier positioned at each end of the guide rail; a) an ascending position at which the work can be transferred to the support by engaging and disengaging the work support, and b) the carrier is supported by the work support. A seesaw-type work transfer device, wherein the guide rail is swung so as to take a lower position lower than the work so as not to come into contact with the work when advancing to a position directly below the work.