JPH0329086Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a device for checking the set state of a workpiece and reliably holding it. This invention relates to a workpiece holding device for properly holding the workpiece at a proper processing position when honing the inner circumferential surface of the workpiece.

(Prior art) Conventionally, a setting means for setting a workpiece from a standby position to a processing position, a means for electrically detecting the movement of this setting means to confirm the presence or absence of a workpiece, and a means for checking whether the workpiece is properly There is a device for confirming the set state of a workpiece, which is equipped with means for electrically confirming whether or not the workpiece is set according to the amount of movement of the setting means (see Utility Model Application No. 62,517/1983). According to such a device, it is possible to check not only whether the workpiece is at the processing position, but also whether the workpiece is properly set at the processing position, that is, in a correct posture. Therefore, it is possible to avoid problems such as, for example, honing being performed with the workpiece not properly set, resulting in a decrease in machining accuracy and damage to the honing tool or grindstone.

(Problems to be Solved by the Invention) However, with the conventional apparatus described above, if the workpiece set at the processing position is not properly set, it is not possible to immediately reset the workpiece. Therefore, in such a case, the workpiece is transported to the detachment position without being processed and is ejected by the detachment operation rod, which inevitably reduces work efficiency. It was hot.

Therefore, the purpose of the present invention is to provide a workpiece holding device that can confirm whether or not the workpiece is properly set at the processing position, and to immediately check if the workpiece is not properly set. The object of the present invention is to provide a workpiece holding device that can reset the workpiece to its normal position.

(Means and effects for solving the problem) In order to achieve the above purpose, in the present invention,
The reason why the workpiece cannot be set in the correct position with respect to the support is because most of the workpieces are caught in the middle, and if you lift it up a little and then set it again, it will return to the correct position. This was done with the focus on being able to set things up properly.
Specifically, it includes: a support that is moved between a processing position and a detachment position and supports the workpiece; a detachment operation rod that is fitted into the support and pushes out the workpiece from the support; a cylinder device that is aligned with and presses the detachment operation rod when the support is in the detachment position; and a cylinder device that moves the workpiece from the standby position to the processing position of the support. a setting means having a possible rod; a proper position confirmation means for confirming whether or not the workpiece is properly set at the processing position of the support; and cam means for pressing the detachment operation rod in response to the operation of the cylinder device when the cylinder device is in the position.

With this configuration, when the workpiece is not properly set, the correct position confirmation means issues a signal to that effect, and upon receiving this signal, the cylinder device is driven. As a result, the cam means provided in the cylinder device presses the detachment operation rod to float the workpiece at the processing position. Next, the rod of the setting means pushes down the workpiece again to set (reset) the workpiece. Then, the proper position confirmation means reconfirms the set state of the workpiece, and if the workpiece is not yet properly set, the above operation is repeated.

(Example) Hereinafter, an example of the present invention will be described based on the attached drawings.

The drawings show a holding device for a workpiece W according to an embodiment of the present invention, in which 1 is a support for supporting the workpiece W such as a gear in a processing position, 2 is a support to which the support 1 is attached,
This is a mounting frame member that rotates the support 1 by a predetermined angle between a processing position and a detachment position. The support 1 is
A bulging head 4 having a recess 3 into which the workpiece W is set, and a slender cylindrical mounting portion 6 protruding from the bottom of the bulging head 4 and having a hole 5 extending in the axial direction. Be prepared. A regulating piece 9 is provided on the side surface of the concave portion 3 of the protruding portion 4, and is biased toward the concave portion 3 by a coil spring 7 and has an engagement claw 8 protruding from its tip. Further, the recess 3 of the bulging head 4 and the hole 5 of the mounting part 6 are connected to each other, and a hole 5 is provided in the hole 5 for removing the workpiece W set in the recess 3 from the recess 3. A detachment operation rod 10 is inserted from the recess 3 side and is suspended and supported.

On the other hand, the mounting frame member 2 is adapted to rotate by a predetermined angle around its rotation axis by the rotation of the gear 11, and a pair of mounting holes 12 have a predetermined angle in the radial direction. It is installed through. The two supports 1 are arranged on the mounting frame member 2 by fitting the mounting portions 6 of the supports 1 into each of the mounting holes 12. In this state, the lower end of the detachment operation rod 10 inserted into the hole 5 of each of the supports 1, 1 is
It protrudes downward from the hole 5. Note that each of the attached supports 1, 1 is a workpiece W having a different shape and size.
The diameters of the recesses 3, 3 are set to be different so that they can be used depending on the size of the recesses 3, 3. When each of the supports 1 is rotated and positioned via the mounting frame member 2 to the detached position shown by the dashed line by the rotation of the gear 11, the support 1 is inserted into the hole 5 of one of the supports 1. The lower end of the inserted detachment operation rod 10 faces the tip of the piston rod 15 of the hydraulic cylinder device 14 provided on the base 13, and both rods 10 and 15 are aligned and positioned on the same axis. I'm starting to do that. When the fluid pressure cylinder device 14 is operated in this state, the detachment operation rod 10 is pushed upward.
The workpiece W set in the recess 3 of the support 1 is removed.

On the other hand, the piston rod 15 of the fluid pressure cylinder device 14 is provided with a cam 15a.
is formed at a position where it can engage with the lower end of the release operation rod 10 when the support 1 is in the processing position shown by the solid line in the figure. That is, the cam 15a functions as a cam means for floating the workpiece W by pressing the release operation rod 10 in conjunction with the fluid pressure cylinder device 14 when the workpiece W is not properly set at the processing position. Function.

16 is the support tool 1 for moving the workpiece W from the standby position.
The rod 16 is a movable rod that is set at a machining position, and the rod 16 is fitted into a support portion 18 provided at the tip of a bracket 17 that is rotatable around a support shaft 35 so as to be movable in the axial direction. It is inserted and supported, and is biased downward by a coil spring 19 fitted around the lower end thereof. The bracket 17 is pivotally connected to the tip of a piston rod 21 of a swing cylinder 20 whose base end is swingably supported by the base 13, and changes from the dashed line to the solid line by the operation of the swing cylinder 20. The rod 16 inserted into the tip sets the workpiece W from the standby position to the processing position (recess 3) of the support 1, and the rod 16 and The bracket 17 and the swing cylinder 20 constitute a setting means 22.

The bracket 17 rotates as shown by the solid line, and the tip of the rod 16 fitted into the tip of the bracket 17 is positioned above one of the supports 1, as shown in the figure. On one side (the left side in the figure), a holding means 23 for holding the workpiece W on standby above the support 1 is provided. The holding means 23 includes a main body 24, a holding piece 25 pivotably attached to the main body 24, and a coil spring 26 that biases the holding piece 25. Also,
On the other side corresponding to the tip of the rod 16 (on the right side in the figure), a shooter 27 for transporting the workpiece W to the upper standby position of the support 1 is disposed, and the tip of the shooter 27 and The holding means 23
By the holding piece 25, the carried-in workpiece W is held at a standby position as shown by the dashed line. The workpiece W held at the standby position is pushed down by the rod 16 as the bracket 17 further rotates due to the operation of the swing cylinder 20, and the holding means 23
The holding pieces 25 resist the biasing force of the coil spring 26 and face each other as shown by the dashed line, thereby being set from the standby position to the processing position (recess 3) of the support 1.

Furthermore, an insulating plate 28 is pivotally attached to the top end side of the bracket 17, and the upper end of the rod 16 can come into contact with the insulating plate 28.
is urged upward by a coil spring 29, and its swing range is restricted by a stopper 30 so that it is horizontal when the rod 16 is not in contact with it. When the workpiece W is not waiting at the standby position, the rod 16 that has moved above the support 1 is pushed down by the biasing force of the coil spring 19, and the rod 16
The lower end of is separated from the insulating plate 28. The rod 16 of the setting means 22 is always energized, and the movement of the rod 16, that is, the presence or absence of contact between the lower end of the rod 16 and the workpiece W is electrically detected. In other words,
A set state checking means 31 is configured to check whether or not the workpiece W is set.

Furthermore, two metal pieces 32 are provided at the rear end of the insulating plate 28 to protrude rearward, while electrodes 33 are attached to the upper part of the bracket 17 so as to correspond to the tips of the metal pieces 32, respectively. It is being The electrode 33, the metal piece 32, the insulating plate 28, and the coil spring 29 electrically move the workpiece W to the processing position of the support 1 in accordance with the amount of movement of the rod 16 of the setting means 22. A proper position confirmation means 34 is configured to confirm whether or not it is properly set. That is, when the workpiece W is properly set at the processing position of the support 1, the metal piece 32 is close to the electrode 33 as shown by the solid line, confirming that the set state is normal. On the other hand, when the workpiece W is not properly set at the processing position of the support 1, the insulating plate 2 is moved by the rod 16 of the setting means 22.
8 is pressed and swings as shown by the dashed line against the biasing force of the coil spring 29. As a result, the metal piece 3
2 moves away from the electrode 33, and a signal indicating that the set state of the workpiece W is not normal is emitted. It should be noted that the reason why there are two metal pieces 32 and two electrodes 33 is that they are provided corresponding to each of the supports 1, which are used depending on the size of the workpiece.

Next, the operation of the above configuration will be explained.

(1) First, the workpiece W is carried into the standby position by the shooter 27. At this time, one of the supports 1 is placed below the standby position. Furthermore, the rod 16 of the setting means 22 is retracted via the bracket 17 as shown by the dashed line by the retracting operation of the swing cylinder 20. Therefore, the workpiece W is held above one of the supports 1 by the holding piece 25 of the holding means 23 and the tip of the shutter 27 without being disturbed by the rod 16. There is.

(2) Next, by extending the swing cylinder 20, the rod 16 of the setting means 226 is moved as shown by the solid line via the bracket 17, and the workpiece W is pressed by the rod 16. At this time, the holding piece 25 of the holding means 23 swings as shown by the dashed line against the biasing force of the coil spring 26 as the workpiece W moves downward. It is housed in the recess 3. Then, the engaging claw 8 of the regulating piece 9 provided on the side surface of the recess 3 engages with the groove of the workpiece W (gear), and the movement of the workpiece W is regulated and the workpiece W is properly positioned at the processing position. is set. In this state, the lower end of the rod 16 of the setting means 22 is attached to the workpiece W.
This is electrically detected by the set state confirmation means 31, and the workpiece W is in contact with the workpiece W.
is confirmed to be in the set state. Also,
The upper end of the rod 16 of the setting means 22 is in contact with or close to the lower surface of the insulating plate 28, and the metal piece 32 is close to the electrode 33, so that the workpiece W is properly positioned at the processing position (recess 3) of the support 1. A signal is issued indicating that the setting is set to .

(3) After that, the gear 11 is rotated by a predetermined angle to move the support 1 on which the workpiece W is set to the position of the honing tool (not shown), and
honing process.

(4) When the honing process is completed, the gear 11 is rotated again and the support 1 is rotated so that the axes of the detachment operation rod 10 fitted into the support 1 and the piston rod 15 of the fluid pressure cylinder device 14 are aligned.
Move it to the release position shown by the dashed line and position it. And the fluid pressure cylinder device 14
As a result of the operation, the piston rod 15 is extended, the detachment operation rod 10 is projected, and the workpiece W in the set state is detached from the support tool 1.

(5) Furthermore, when the workpiece W is not carried into the standby position, the rod 1 of the setting means 22 is
6 moves downward as shown by the dashed line, and its lower end enters the recess 3 of the support 1,
The set state confirmation means 31 confirms that the workpiece W is not set on the support tool 1.

(6) Even if the workpiece W is carried into the standby position and set at the processing position of the support 1 by the setting means 22, if it is not set properly, the rod of the setting means 22 1
The downward movement of rod 16 is restricted midway and the rod 16
The upper end presses the insulating plate 28, and the insulating plate 28 swings as shown by the dashed line against the biasing force of the coil spring 29. As a result, the metal piece 3
2 moves away from the electrode 33, and the workpiece W is moved away from the support 1 by the correct position confirmation means 34.
A signal is issued indicating that the machine is not properly set at the processing position. Then, in response to this signal, the fluid pressure cylinder device 14 operates, and the cam 15a moves forward together with the piston rod 15. Due to this forward movement, the cam 15a engages with the lower end of the detachment operation rod 10 and pushes the detachment operation rod 10 upward. As a result, the workpiece W is lifted up, but after the piston rod 15 retreats, the swing cylinder 20 is operated, and the workpiece W is pushed down again by the rod 16. When the pressed down workpiece W is set in the correct position, the normal position confirmation means confirms this and the honing process is started. However, if it is not set at the normal position, the above operation will be repeated again.

Note that the above reset must be repeated a predetermined number of times (for example, twice).
If you cannot set it to the correct position even after repeated attempts,
For example, there is a high possibility that the workpiece W itself has some kind of abnormality, so in this case, the workpiece W should be ejected unprocessed at the release position without performing any further reset. You can.

(Effects of the invention) As is clear from the above, the invention has the following effects:
When the workpiece is not properly set at the processing position, the workpiece can be immediately reset to the normal position and subsequent processing can be continued. As a result, processing efficiency can be greatly improved compared to the case where a workpiece that is not set at the normal position is ejected from the detached position without being processed.

Of course, in the present invention, since the cylinder device for extruding the workpiece is effectively utilized as it is to constitute the cam means used when resetting the workpiece to the normal position, structurally, This is extremely advantageous from the viewpoint of cost.

[Brief explanation of the drawing]

The drawing is a side sectional view showing one embodiment of the present invention. 1: Support tool, 14: Cylinder device, 15: Rod, 15a: Cam portion, 22: Setting means, 34:
Regular position confirmation means, W: Workpiece.

Claims (1)

[Claims for Utility Model Registration] A support that is moved between a processing position and a detachment position to support a workpiece, and a detachment operation that is inserted into the support and pushes out the workpiece from the support. a cylinder device that aligns with the detachment operation rod and presses the detachment operation rod when the support is in the detachment position; and a cylinder device that presses the detachment operation rod from the standby position to the processing position of the support. a setting means having a movable rod for setting the workpiece; a proper position confirmation means for checking whether the workpiece is properly set at the processing position of the support; A workpiece holding device comprising: cam means for pressing the detachment operation rod in accordance with the operation of the cylinder device when the workpiece is in the processing position.