JP2851123B2 - Polishing machine automatic cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a polishing machine for polishing a knife such as a planer blade, which is used to automatically cut a predetermined amount of a grindstone into the blade surface of the knife. Related to the device.

[Conventional technology]

Conventionally, a super-finished planer blade, an automatic planer blade, an electric planer blade, etc., have been used as conventional blade grinders.
There are types as disclosed in US Pat.
That is, as shown in FIG.
The base 101 includes a support frame 102 and a rail 107. The support frame 102 has a whetstone 103
Are rotatably supported. On the other hand, a table 106 is slidably supported on the rail 107, and a tool post 104 is supported on the table 106.
Is held, and its blade surface is opposed to the polished surface of the grindstone 103.

The support frame 102 supporting the grindstone 103 is
The support frame 102 is provided so as to be able to be attached to and detached from the blade 5, and the movement of the support frame 102 in the direction of the blade 105 is performed by the rotation of the feed screw 108. A manual handle 109 is provided at the right end of the feed screw 108 in the drawing, and by rotating the manual handle 109 by a predetermined amount, the support frame 102 supporting the grindstone 103 is separated from the cutter 105.

[Problems to be solved by the invention]

The grinding wheel 103 is brought into contact with the blade surface 105a of the blade 105 to
When polishing to 105a, the grindstone surface is
In order to perform accurate grinding by sequentially cutting a predetermined amount into a, the manual handle 109 of the feed screw 108 is rotated according to a scale (not shown), and the grindstone 103 is rotated by a predetermined amount.
To make progress.

However, the amount of cut in the grinding surface 105a of the grindstone 105 is very small, and the amount of cut must be accurately controlled.However, the rotation lacks the accuracy while looking at the scale of the manual handle 109. , The blade surface 105a of the blade 105
However, there was a problem that it could not be polished accurately.

In view of the foregoing, an object of the present invention is to provide an automatic cutting device for a polishing machine that can accurately polish a blade surface of a blade without bothering an operator.

[Means for solving the problem]

A tool post is mounted on a table, a tool to be polished is fixed to the tool post, a grindstone is provided on this tool so that it can be separated and approached, and the cutting edge of the tool is cut by the grindstone to perform an automatic cutting device of a grinding machine. , A sliding base supporting the grinding stone is screwed into a feed screw, and the feed screw is connected to an automatic driving unit, and is automatically rotated in accordance with the movement of the tool post, so that the grinding stone is sequentially cut into the blade. I did it.

[Action]

Set the turret on the table, slide the turret in the axial direction of the grindstone to polish the blade surface of the knives, and when the turret comes to the reference position, slide the base supporting the grindstone with the feed screw. It rotates automatically and cuts a certain amount of grindstone surface into the blade. After the polishing of the blade surface at a certain amount of cut has been completed,
The feed screw is further automatically rotated by a predetermined amount, whereby the grindstone surface is further cut into the blade surface of the blade by a predetermined amount to polish the blade surface of the blade.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 and 2, a polishing machine M according to the present invention is shown.
Has a base 1 extending in the longitudinal direction, on which rails 2, 2 and a table 4 which slides on the rail 2 in the longitudinal direction of the base 1 are provided. A sliding base 5 is provided on one side of the base 1.
A round whetstone 7 is supported on the top. This round whetstone 7
Is rotated by a grinding wheel motor 8. The sliding base 5
Is provided so as to be slidable in a direction perpendicular to the longitudinal direction of the base 1, that is, in a lateral direction. A grindstone base 3 is provided at an appropriate position on the table 4. Is fixed. A blade surface 6a is formed on the upper part of the blade 6, and the blade surface 6a is polished by a polishing surface 7a of a grindstone 7.
The tool rest 3 is pivotally attached to a support frame 4a provided on the table 4 by a shaft 3a. By rotating the tool rest 3 about the shaft 3a, the position of the blade surface 6a of the tool 6 can be accurately determined. Control.

The table 4 supporting the tool rest 3 is provided so as to be reciprocable in the longitudinal direction of the base 1, and the reciprocating movement is performed by rotating the table drive motor 10 on the lower surface of the table 4 (not shown) via a gear mechanism 11. This is performed by transmission by a provided pinion rack mechanism. The pinion rack mechanism (not shown) is also driven by the table manual handle 9.

On the other hand, the grindstone 7 provided on the sliding base 5 is slidably provided in a direction orthogonal to the longitudinal axis of the base 1, that is, in a lateral direction (XY direction). A manual handle 14 is provided at the left end of the feed screw 12 in FIG. 2, and a drive for automatically rotating the feed screw is provided at the other end of the feed screw 12. A part 15 is formed. As shown in FIG. 3, the drive section 15 has a circular ratchet 16 attached to one end of a feed screw, a reciprocating member 17 for rotating the ratchet 16 by a predetermined angle, and the like. A pawl 18 is provided at an intermediate portion of the reciprocating member 17 to engage with the teeth of the ratchet. The ratchet 16 rotates by a predetermined angle due to the reciprocating motion of the pawl 18. The reciprocating member 17 reciprocates in the DE direction by a solenoid 19, and the iron piece 20 attached to the right end in the drawing of the reciprocating member 17 is attracted by the solenoid 19, so that the reciprocating member 17 moves in the E direction. Moving. The left end of the reciprocating member 17 in the drawing is slidably supported by a support member 22 fixed to the frame of the drive unit 15 and attached to the left end of the support member 22 and the reciprocating member 17 in the drawing. A coil spring 23 is interposed between the retaining rings 24. The reciprocating member 17 is
Are urged in the left direction on the drawing, that is, in the D direction. The ratchet pawl 18 is pivotally connected to a pin 50,
The pin 18 is urged in the counterclockwise direction about the pin 50 by a coil spring 51, and the lower surface of the claw 18 contacts the stopper 52, whereby the counterclockwise rotation is restricted.

According to such a configuration of the drive unit 15, when the solenoid 19 is excited, the reciprocating member 17 moves in the direction E in the drawing,
This causes the pawl 18 to slightly rotate the ratchet 16 counterclockwise in the figure. When the solenoid 19 is not excited, the reciprocating member is actuated by the action of the coil spring 23.
17 returns in the direction D in the figure. At this time, the claw 18 is
While pressing 51, it slightly rotates clockwise in the figure to pass through the teeth of the ratchet 16 and engage with the next tooth. In this manner, the ratchet 16 is sequentially rotated at a slight angle by the excitation and non-excitation of the solenoid 19, whereby the feed screw 12 is rotated, and the grindstone 7 is fixed to the tool rest 3. It is cut into 6a one by one.

The operation panel 25 is located on the left side of the base 1 in FIG.
The operation panel 25 includes, for example, the XY
A start button 40 for performing automatic feed in the direction or a stop button 39 for stopping the automatic feed operation is provided.

FIG. 4 shows an automatic feeder for automatically feeding the grinding wheel 7.
This automatic feed control unit 30 has an automatic feed selection circuit 38 composed of a flip-flop circuit.The automatic feed selection circuit 38 is connected to a start button 40 and is connected to a stop button 39. They are connected via an OR circuit 37. The signal from the automatic feed selection circuit 38 is input to a one-shot pulse generation circuit 36 comprising a short-stable multivibrator.
The ON / OFF of the solenoid 19 as an operating member is controlled by 36. The one-shot pulse generation circuit 36 outputs a pulse signal having a pulse width determined by an external CR time constant circuit from its output terminal. The one-shot pulse generating circuit 36 is supplied with a pulse by a differentiating circuit 33, and the differentiating circuit 33 comprises a limit switch which is activated when the table 4 comes to a position where the tool post 3 starts polishing, ie a reference position. The signal of the detection unit 32 is input. The signal from the detector 32 is also supplied to a left-right reciprocating controller 31 for reciprocating the table 4 left and right, and the table motor 10 is controlled by the left-right reciprocating controller 31. Note that the output signal from the detection unit 32 is
The number setting circuit 35 is connected to the counting unit 34, and the output signal from the number setting circuit 35 is ORed.
The signal is supplied to an automatic feed selection circuit 38 via a circuit 37. The output signal from this automatic feed selection circuit 38 is
This enables or disables the counting unit 34.

Next, the operation of the automatic cutting device of the polishing machine of the present invention will be described.

First, the tool 6 to be polished is fixed to the tool rest 3, and the table 4 is moved to the polishing start position, that is, its reference position. When the table 4 is at the reference position, that is, when the tool rest 3 is at the polishing start position, the slide handle 14 of the feed screw 12 is rotated to bring the slide base 5 toward the tool rest 3 and grind the grindstone 7. The surface 7 a is brought into contact with the blade surface 62 of the blade 6. Thus, the preparation of the first predetermined amount of cutting is completed. In this state, the automatic feed selection circuit 38
Accordingly, the one-shot multivibrator is reset, and the counting section 34 is in a state where counting is impossible. When the start button 40 is pressed in this state, the table 4 moves, the limit switch of the detection unit 32 changes from the ON state to the OFF state, a voltage change occurs, and the differentiating circuit 33 generates a pulse signal. The pulse causes the one-shot multivibrator to output a pulse signal of a predetermined width to the solenoid 19. That is, the detection unit
When the table 4 is separated from the limit switch 32, the change in the output voltage is sent to the left and right reciprocating control unit 31 to control the rotation of the table drive motor 10, and the differentiating circuit 33 generates a negative pulse due to the change in the output voltage of the limit switch. Thus, the solenoid 19 is excited for a predetermined time.
When one pulse is generated from the one-shot multivibrator, the feed screw 12 rotates by an angle corresponding to one tooth of the ratchet 16, whereby the grinding wheel surface 7 a of the grinding wheel 7 is rotated.
Advances by a predetermined cutting amount. When the table 4, that is, the tool rest 3 makes one reciprocation on the base 1 and is polished by a predetermined amount, that is, a cutting amount corresponding to one pulse, and then returns to the original reference position again, the limit switch of the limit switch detecting unit 32 is turned on. Turns on and changes the output voltage. Similarly, the differentiating circuit 33 generates a pulse by the change of the output voltage,
This pulse excites the solenoid 19 via a one-shot pulse generation circuit 36 composed of a one-shot multivibrator. The ON / OFF operation of the limit switch of the detecting unit 32 is counted by the counting unit 34, and when the count reaches the set number set by the number setting circuit 35, the output signal of the OR circuit 37 is output. After that, it is given to the automatic feed selection circuit 378. In the embodiment, the number setting is 1
When the value is set to 0 and the solenoid 19 is turned ON and OFF ten times, the automatic feed selection circuit 38 resets the one-shot pulse generation circuit and sets the count section 34 to a count disabled state.

In the embodiment, the grindstone 7 has ten stages of the blade surface 6a of the blade 6.
In this manner, the cutting surface 6a of the cutting tool 6 is accurately polished by the polishing surface 7a of the grindstone 7 by a predetermined cutting amount. The sliding base 5 is separated from the blade surface of the blade 6 by rotating a manual handle 14 attached to a feed screw 12. When the feed screw 12 is rotated in the reverse direction, the ratchet 16 of the drive unit 15 is rotated in the reverse direction, that is, clockwise in the figure, but the shape of the ratchet teeth is formed so that the pawl 18 does not hinder the movement. Have been.
If it is desired to stop the cutting operation during the grinding of the blade 6, if the stop button 39 is pressed, a change in the output voltage activates the automatic feed selection circuit 38, and the one-shot pulse generation circuit and the counting section 34 Stop the operation.

In this manner, if the cutting operation of the blade surface 6a of the blade 6 is automatically performed, the polishing of the blade 6 is completed in a short time, and the polishing can be performed with an accurate cutting amount.

〔The invention's effect〕

Since the present invention is configured as described above, there is an effect that the blade surface of a knife such as a planer blade can be accurately ground in a short time and accurately.

[Brief description of the drawings]

1 is a plan view of a polishing machine according to the present invention, FIG. 2 is a front view of the same, FIG. 3 is a front view of a drive unit, FIG. 4 is a block diagram of an automatic feed control unit, and FIG. It is a front view of a polishing machine. 1 ... base, 3 ... turret, 4 ... table, 5 ... sliding base, 7 ... grindstone, 9 ... table manual handle, 12 ... feed screw, 15 ... drive unit, 16 ... ... ratchet, 18 ... nail, 25 ... operation panel.

Claims (1)

(57) [Claims] A polishing machine for mounting a tool post on a table, fixing a tool to be polished to the tool post, providing a grindstone to the tool so as to be detachable from the tool, and cutting the blade of the tool with the grindstone for polishing. In the automatic cutting device, the sliding base supporting the grindstone is screwed into a feed screw, and the feed screw is connected to an automatic driving unit to automatically rotate in accordance with the reciprocating switching of the tool post, and the grindstone is rotated. The automatic driving unit detects (1) a reference position of the tool post,
A detection unit that outputs a signal for operating a reciprocation control unit for reciprocating the table; and (2) when the tool post reaches the reference position, generates a pulse according to a signal from the detection unit. A pulse generating circuit; (3) a ratchet attached to the feed screw; (4) a reciprocating member reciprocated by a solenoid in response to a pulse from the pulse generating circuit; and engagement with a blade of the ratchet. An actuating member comprising a claw supported by the reciprocating member, operated by a pulse from the pulse generating circuit to rotate the ratchet by a predetermined angle, and (5) an output signal output from the detection unit A counting unit having a number setting circuit for sequentially setting the number of cuts of the whetstone into the blade, and (6) automatically feeding the whetstone, An output section, a start button, a stop button, an automatic feed selection circuit including a flip-flop circuit for operating the pulse generation circuit and the count section in accordance with signals from the count section and the number-of-times setting circuit. An automatic cutting device for a grinding machine.