JPH048462A - Automatic infeed device in grinder - Google Patents

Abstract

PURPOSE:To grind an edge surface of a cutter for a plane iron or the like accurately in a short time by attaching a sliding base, supporting a grinding wheel, to a feed screw, connecting this feed screw to an automatic driving part, making it correspond to the reciprocating changeover of a tool rest and rotate automatically, then constituting the grinding wheel so as to infeed to the cutter successively. CONSTITUTION:A tool rest 3 is set on a table 4, making this tool rest 3 slide in the axial direction of a grinding wheel 7, thus an edge surface 6a of a cutter 6 is ground. When this tool rest 3 has come to a reference position, a sliding base 5 supporting the grinding wheel 7 is automatically rotated by a feed screw 12, infeeding a wheel face to the cutter 6 as far as the specified amount. After completion of grinding the edge surface 6a with the specified amount of infeed, the feed screw 12 is further rotated automatically as far as the specified value, through which the wheel face is further cut in the edge surface 6a of the cutter 6, grinding this edge surface 6a of the cutter 6 in addition.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an automatic cutting method of a grinding machine for grinding a cutter such as a planer blade, for making a grindstone cut a predetermined amount into the blade surface of the cutter. Regarding equipment.

[Conventional technology]

As a knife polisher for sharpening knives such as super-finish planer blades, automatic planer blades, and electric planer blades, the
8260 exists. In other words, as shown in Fig. 5, the conventional polishing machine:
It has a base 101, and a support frame 1 is mounted on this base 101.
02 and rails 107. A grindstone 103 is rotatably supported by the support frame 102 .

On the other hand, a table 106 is slidably supported on the rail 107, a tool rest 104 is supported on this table 106, and a cutter 105 is held obliquely on this tool rest 104.
Its blade surface faces the polishing surface of the grindstone 103.

A support frame 102 supporting the grindstone 103 is provided so as to be able to move toward and away from the cutter 105, and the movement of the support frame 102 in the direction relative to the cutter 105 is caused by the feed screw 1.
This is done by 08 rotations. 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 that supports the grindstone 103 is brought into and out of contact with the cutter 105.

[Problem to be solved by the invention]

When the grindstone 103 is brought into contact with the blade surface 105a of the knife 105 to polish the blade surface 105a, it is necessary to make the grindstone surface cut into the blade surface 105a of the knife 105 by a predetermined amount sequentially to perform accurate polishing. Therefore, the manual handle 109 of the feed screw 108 is rotated according to a scale (not shown) to advance the grindstone 103 by a predetermined amount relative to the blade surface 105a.

However, the amount of cut into the polishing surface 105a of the grindstone 105 is very small, and the amount of cut must be accurately controlled. There were problems such as chipping and the fact that the blade surface 105a of the cutter 105 could not be polished accurately.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide an automatic cutting device for a polishing machine that can accurately polish the blade surface of a cutter without bothering the operator.

[Means to solve the problem]

An automatic cutting device for a grinding machine that attaches a tool rest on the table, fixes the tool to be polished on the tool rest, attaches a grindstone to the tool so that it can move toward and away from it, and cuts and polishes the blade of the tool with this grindstone. In this step, the sliding base supporting the grinding wheel is screwed onto a feed screw, and this feed screw is connected to an automatic drive unit to automatically rotate in accordance with the movement of the tool rest, so that the grinding wheel sequentially cuts into the blade. I did it like that.

[Effect]

Set the turret on the table, slide the turret in the axial direction of the whetstone to polish the blade surface of the blade, and when the turret reaches the reference position, move the sliding base that supported the whetstone using the feed screw. It rotates automatically and causes the blade to cut into the grinding wheel surface by a certain amount.

After the grinding of the blade surface with a certain depth of cut is completed, the feed screw automatically rotates a predetermined amount further, thereby causing the grinding wheel surface to further cut into the blade surface of the cutter by a certain amount, thereby polishing the blade surface of the cutter. Polish.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, the polishing machine M according to the present invention is
It has a base 1 extending in the longitudinal direction, and on this base 1, rails 2, 2 and a table 4 that slides on the rails 2 in the longitudinal direction of the base 1 are provided. A sliding base 5 is provided on one side of the base 1, and a round grindstone 7 is supported on the sliding base 5. This round grindstone 7 is rotated by a grindstone 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 the lateral direction, and a grinding wheel rest 3 is provided at an appropriate position on the table 4, and a grindstone rest 3 is provided on the front surface of the tool rest 3. The blade 6 is fixed diagonally. A blade surface 6a is formed on the upper part of the cutter 6, and a polishing surface 7a of a grindstone 7 polishes this blade surface 6a. Note that the tool rest 3 is pivotally connected to a support frame 4a provided on the table 4 by a shaft 3a, and this shaft 3a
By rotating the tool post 3 around the center, the position of the blade surface 6a of the cutter 6 is accurately controlled.

A table 4 supporting the tool rest 3 is provided so as to be able to reciprocate in the longitudinal direction of the base 1, and the reciprocating movement is caused by the rotational force of the table drive motor 10 or the gear mechanism 11 being applied to the lower surface of the table 4 (not shown). This is done by being transmitted by a pinion rack mechanism provided. In addition,
This pinion rack mechanism (not shown) is also driven by a table manual handle 9.

On the other hand, the grinding wheel 7 provided on the sliding base 5 is slidably provided in a direction perpendicular to the longitudinal axis of the base 1, that is, in the lateral direction (XY force direction), and the movement of the sliding base 5 is This is done by the rotation of the screw 12, and this feed screw 1
A manual handle 14 is provided at the left end of the feed screw 12 in FIG. 2, and a drive portion 15 for automatically rotating the feed screw 12 is formed at the other end of the feed screw 12. As shown in FIG. 3, the drive unit 15 has a circular ratchet 16 attached to one end of the feed screw, and a reciprocating member 17 for rotating the ratchet 16 by a predetermined angle. A pawl 18 that engages with the teeth of the ratchet is provided at the intermediate portion of the reciprocating member 17, and the reciprocating movement of the pawl 18 rotates the ratchet 16 by a predetermined angle. The reciprocating member 17 is reciprocated in the DE force direction by the solenoid 19, and the iron piece 20 attached to the right end of the reciprocating member 17 in the figure is attracted by the solenoid 19, so that the reciprocating member 17 moves in the E direction. do. The left end of the reciprocating member 17 in the figure is slidably supported by a support member 22 fixed to the frame of the drive unit 15, and the support member 22 and the left end of the reciprocating member 17 in the figure are attached to each other. A coil spring 23 is interposed between the retaining rings 24. The reciprocating member 1 is
7 is biased toward the left side in the figure, that is, in the D direction. Further, the pawl 18 of the ratchet is pivotally connected to a pin 50, and the pawl 18 is attached to a coil spring 51 with the pin 50 as the center.
The lower surface of the claw 18 contacts the stopper 52, thereby restricting its rotation in the counterclockwise direction.

According to such a configuration of the drive unit 15, the solenoid 19
When the reciprocating member 17 is excited, the reciprocating member 17 moves in the E direction in the drawing, and the pawl 18 thereby causes the ratchet 16 to rotate slightly counterclockwise in the drawing.

When the solenoid 19 is de-energized, the reciprocating member 17 returns in the upward direction in the figure by the action of the coil spring 23. At this time, the pawl 18 rotates slightly clockwise in the figure while pressing the spring 51, passes through the teeth of the ratchet 16, and engages with the next tooth. In this way, by energizing and de-energizing the solenoid 19, the ratchet 16 sequentially rotates at an image angle, which causes the feed screw 12 to rotate and the grinding wheel 7 to rotate on the blade surface of the blade 6 fixed to the tool post 3. 6a are cut one after another.

In addition, in FIG. 1, there is an operation panel 25 on the left side of the base 1.
The operation panel 25 is provided with, for example, a start button 40 for automatically feeding the grindstone 7 in the XY force directions or a stop button 39 for stopping the automatic feeding operation.

FIG. 4 shows an automatic feeding section 3 for automatically feeding the grindstone 7.
0 shows the configuration of automatic feed control section 30.
is an automatic feed selection circuit 38 consisting of a flip-flop circuit.
This automatic feed selection circuit 38 has a start button 4.
0 and stop button 391m OR
They are connected via a circuit 37. The signal from the automatic feed selection circuit 38 is input to a one-shot pulse generation circuit 36 consisting of a short stable multivibrator, and this one-shot pulse generation circuit 36 controls ON/OFF of a solenoid 19 as an operating member. 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. A pulse is given to the one-shot pulse generation circuit 36 by a differentiating circuit 33, and this differentiating circuit 3
3 receives a signal from a detection section 32, which is a limit switch that is activated when the table 4 or the turret 3 reaches a position where polishing is to be started, that is, a reference position.

The signal from the detection section 32 is also given to a left-right reciprocating control section 31 that causes the table 4 to reciprocate left and right, and the table motor 10 is controlled by this left-right reciprocating control section 31. Note that the output signal from the detection section 32 is also given to a counting section 34, and a number setting circuit 35 is connected to this counting section 34, and the output signal from this number setting circuit 35 is passed through the OR circuit 37. The signal is applied to the automatic feed selection circuit 38. The output signal from the automatic feed selection circuit 38 is also applied to the counting section 34, thereby enabling or disabling the counting section 34.

Next, the operation of the automatic cutting device for a polishing machine according to the present invention will be explained.

First, the blade 6 to be polished is fixed on the tool rest 3, and the table 4 is moved to the polishing start position, that is, its reference position. When the table 4 reaches the reference position, that is, the tool rest 3 reaches its grinding start position, the manual handle 14 of the feed screw 12 is rotated to bring the sliding base 5 toward the tool rest 3, and the grinding surface of the grindstone 7 is rotated. 7a is brought into contact with the blade surface 6a of the cutter 6. In this way, the preparation for starting the first cut of a predetermined amount is completed. In this state, the one-shot multivibrator has been reset by the automatic feed selection circuit 38, and the counting section 34 is in a state in which counting is disabled. When the start button 40 is pressed in this state, the table 4 moves, the IJ Mitswitch of the detection section 32 changes from the ON state to the OFF state, a voltage change occurs, and the differentiation circuit 33 generates a pulse signal, In response to this pulse signal, the one-shot multivibrator outputs a pulse signal of a predetermined width to the solenoid 19. That is, when the table 4 moves away from the limit switch of the detection section 32, the change in the output voltage is sent to the left/right reciprocating control section 31 to control the rotation of the table drive motor 10, and the differential circuit 33 becomes negative due to the change in the output voltage of the limit switch. The solenoid 19 is energized for a predetermined period of 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, thereby causing the grindstone surface 7a of the grindstone 7 to advance by a predetermined depth of cut. When the table 4, that is, the turret 3 reciprocates over the base 1 and is polished by a predetermined amount, that is, the amount of cutting equivalent to one pulse, it returns to the original reference position, and the limit switch of the IJ Mitswitch detection unit 32 is turned on and a change in output voltage occurs. Due to this change in output voltage, the differentiating circuit 33 generates a pulse in the same way, and this pulse passes through the one-shot pulse generation circuit 36 consisting of a one-shot multivibrator, and then passes through the solenoid 1.
9 is excited. O of the limit switch of the detection section 32
The N and OFF operations are counted by the counting unit 34, and when this count reaches the set number set by the number setting circuit 35, the 8-power signal is passed through the OR circuit 37 to the automatic feed selection circuit 38. Given.

In the embodiment, the number of times is set to 10, and when the solenoid 19 performs 0NXOFF operation 10 times, the automatic feed selection circuit 38 resets the one-shot pulse generation circuit and disables the counting section 34.

In the embodiment, the grindstone 7 adjusts the blade surface 6 of the cutter 6 in 10 steps.
In this way, the blade surface 6a of the blade 6 is accurately ground by a predetermined depth of cut by the grinding surface 7a of the grindstone 7. Note that in order to separate the sliding base 5 from the blade surface of the cutter 6, a manual handle 1 attached to the feed screw 12 is used.
This is done by rotating 4. When the feed screw 12 is rotated in the opposite direction, the ratchet 16 of the drive unit 15 is rotated in the opposite direction, that is, in the counterclockwise direction in the drawing. At this time, the teeth of the ratchet are shaped so that the pawl 18 does not interfere with the movement. is formed. If you wish to stop the cutting operation during the polishing of the blade 6, press the stop button 39, and the change in output voltage will operate the automatic feed selection circuit 38, which will cause the one-shot pulse generation circuit and counting section 34 to operate. Stop the operation.

If the cutting operation of the blade surface 6a of the blade 6 is performed automatically in this way, the blade 6 can be polished in a short time and can be polished with an accurate depth of cut.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the effect of accurately polishing the blade surface of a cutter such as a planer blade in a short time and accurately.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the polishing machine according to the present invention, Fig. 2 is a front view thereof, Fig. 3 is a front view of the drive section, Fig. 4 is a block diagram of the automatic feed control section, and Fig. 5 is a conventional polishing machine. It is a front view of a polishing machine. DESCRIPTION OF SYMBOLS 1... Base, 3... Turret post, 4... Table, 5... Sliding base, 7... Grindstone, 9... Table manual handle, 12... Feed screw, 15 ... Drive unit, 16... Ratchet, 18... Pawl, 25... Operation panel.

Claims (1)

[Claims] 1. A tool rest is mounted on the table, a knife to be polished is fixed to this tool rest, and a whetstone is provided on the tool so that it can be brought into and out of contact with the tool,
In an automatic cutting device for a grinding machine that cuts and polishes the blade of a cutter using this grindstone, a sliding base that supports the grindstone is screwed onto a feed screw, and this feed screw is connected to an automatic drive part to form a tool rest. An automatic cutting device for a grinding machine, characterized in that the grinding wheel is automatically rotated in response to reciprocating switching, and the grinding wheel is made to sequentially cut into the cutter. 2. The automatic drive unit includes a detection unit that detects the position of the tool post, a pulse generation circuit that generates pulses in response to a signal from this detection unit, and operates by the pulses from this pulse generation circuit, and operates by the pulses from the pulse generation circuit. 2. The automatic cutting device for a polishing machine according to claim 1, comprising an operating member such as a solenoid that rotates the screw by a predetermined amount, and a counting section that counts the number of output signals output from the detection section.