JP2524194Y2 - Tool protection mechanism in automatic polishing machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade protection mechanism for an automatic polishing machine having a self-loading water tank.

[0002]

BACKGROUND OF THE INVENTION Conventional polishing machines, power and tool rest moving reversible electric motor and the grinding wheel drive motor is a separate, start and stop by operating each of the power switch independent
Do. In the blade polishing work, the blade is fixed to the tool post,
Power switch for motor for operation and reversible motor for tool post movement
And reciprocate the tool post and rotate the grindstone.
Pour the cutting fluid from the water tank into the contact area between the blade and the grindstone.
Had water.

[0003]

[Problem to be solved by the invention] Usually, polishing of one blade
It takes about 10 minutes to rotate the grindstone and move the tool post.
After the blade polishing operation is started by returning, the operator separates from the polishing machine.
In many cases, driverless driving is used. In that case, during the work
The cutting fluid in the water injection tank runs out, and the contact area between the blade and the grindstone
When the cutting fluid is no longer supplied, the cutting edge
There is a problem that the accuracy and strength of
Was.

[0004] An object of the present invention is to eliminate the above-mentioned disadvantages of the prior art and to prevent burning of the cutting edge of the blade during polishing of the blade.

[0005]

According to the present invention, a detector for detecting a predetermined remaining amount of cutting fluid in a water injection tank is provided, and a reversible motor and a power supply for the motor are connected in series by the operation of the detector. This can be achieved by shutting off the power of the grinding wheel and the tool rest by deenergizing the opened / closed contact.

[0006]

When the amount of cutting fluid in the water injection tank reaches a predetermined level, the grinding machine configured as described above activates the detector to open the contacts of the electromagnetic switch, and the reversible motor for moving the tool post and the grindstone. The power of the driving motor is cut off, and the reciprocating motion of the tool rest and the rotation of the grindstone stop.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 is a side view of the automatic polishing machine, and FIG. 2 is a front view of FIG.
is there.

In the figure, a rail formed on a base 1
A tool post 3 is provided slidably to the left and right with the guide 2.
A rack 4 is provided on the lower surface of the tool post 3, and the rack 4 is
On the shaft of the reversible motor 5 for moving the tool post
With the pinion 6. The tool post 3 is a shaft
7 is configured to be freely tiltable. The tool post 3
The tool 9 is clamped and fixed on the tool post 3 by the tool holder 8.
You. A rough whetstone facing the tool post 3 at the upper rear of the base 1
9, cup-shaped finishing whetstone 10, and respective whetstones 9, 1
It is composed of a whetstone driving motor 11 that rotationally drives 0
A head section 12 is provided.

The power of the reversible motor 5 is transmitted to the pinion 6 and the rack.
The tool rest 3 to which the tool 27 is fixed by the tool holder 8 via the tool holder 4
Is moved to guide the rail 2, and a pair of
The reversing position detected by the reversing position detecting pieces 13 and 13 on the base 1
By turning the detection switch 14 “ON / OFF”,
The connection of the capacitor 15 is switched. This allows reversible motor
5, the tool post 3 is reciprocated right and left.

[0010] A water injection tap containing cutting fluid 16 on head 12
Is provided, and each of the
Hose 19 for sending cutting fluid 16 to rough whetstone 9 and finish whetstone 10
And a hose 20 are provided.

FIGS. 3 and 4 show the components of the present invention.
It will be described using FIG. Fig. 3 is a partially enlarged section of the water injection tank
FIG. 4 is a circuit diagram. In the water injection tank 17, cutting
A water level detector 21 for detecting the water level of the liquid 16 is provided.
When the water level of 16 becomes higher than ho, the contact of the water level detector 21
21a is closed, and this area becomes an ON area h. Cutting fluid 1
When the water level of No. 6 falls below ho, the contact 21a opens and this
The area becomes an OFF area ho. Press the power switch 22
Then, the coil 23 of the electromagnetic switch is excited, and the contact 23a is
Closed and self-holding, the contact 23b is closed. Ma
When the stop switch 24 is pressed, the coil 2 of the electromagnetic switch is pressed.
3 stops excitation and releases self-holding.

In the above configuration, the blade 27 is polished.
First, the knife 27 is fixed to the tool rest 3 and
The gantry 3 is set at a set angle that matches the included angle of the blade 27. Next
In the self-holding state, the reversible electric motor for moving the tool post is
Switches 25, 2 for the grinding machine 5 and the grindstone driving motor 11
6 and drive the electric motors 5 and 11, reversing the tool post 3
While reciprocating left and right by forward and reverse rotation of the motor 5, rough grinding
The knife 27 is polished by rotating the stone 9 and the tool rest 3 is moved left and right several times.
After reciprocating, the blade 27 is polished with the finishing whetstone 10.
During the polishing, the cock 18 prevents the stones 9 and 10 from burning.
Is opened and the grinding fluid 16 in the water injection tank 17 is
Water is injected into the contact portion between the grindstones 9 and 10 and the cutting tool 27 through 20
doing.

While the blade 27 is being polished,
When the water level of the cutting fluid 16 falls below ho, the water level detector 21
Contact 21a opens, and the coil 23 of the electromagnetic switch excites
Stop, contacts 23a and 23b open, reversible motor 5
The state of the start switches 25 and 26 of both the stone driving motor 11
Regardless of the state, shut off the power to each motor 5, 11
Then, the rotation of the grindstones 9 and 10 and the reciprocation of the tool post 3 are stopped.
Let

[0014]

According to the present invention, the power is automatically cut off when the amount of the cutting fluid in the water injection tank reaches a predetermined amount or less, so that the blade can be prevented from burning.

[Brief description of the drawings]

FIG. 1 is a side view of an automatic polishing machine showing an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is an enlarged sectional view of a water injection tank section.

FIG. 4 is a circuit diagram.

[Description of Signs] 5: Reversible motor for moving tool post, 9: Rough whetstone, 10: Finish
Whetstone, 11 ... Electric motor for driving whetstone, 16 ... Cutting fluid, 17 ...
Injection tank, 21 ... Water level detector, 21a ... Contact point, 22 ...
Power switch, 23 ... coil, 23a, 23b ... contact,
27 ... knife.

Claims (1)

(57) [Scope of request for utility model registration] 1. A tool rest for holding a tool on a base is reciprocally mounted on the base via the power of a reversible motor, and the tool and a grindstone driven by the motor are configured to be able to freely contact and separate from each other. A self-weight water injection type tank is provided in the machine, and the cutting fluid is injected into the contact area between the blade and the grindstone. Providing a detector to detect, between the reversible motor and the motor and the power supply by the operation of the detector,
A blade protection mechanism in an automatic polishing machine, wherein a switching contact connected in series is deenergized.