JPH07227745A - Circular piece tip grinding jig - Google Patents

Abstract

PURPOSE:To facilitate attaching/detaching of a tip, and precisely regrind the tip by providing a presser shaft for pressing the tip from above, and a sliding plate which can freely slide to right and left on a base provided with a supporting plate, and providing a pair of right and left ball bearings for contacting and backing up the outer peripheral surface of the circular piece tip. CONSTITUTION:A circular piece tip to be ground is nipped between a presser shaft 5 and a supporting plate 4, and energizing by a spring 8 to be pressed against the supporting plate 4. In this case, the abutting surfaces wherein the presser shaft 5 and the supporting plate 4 abut on the circular piece tip, are covered with rubber caps 6 to stably fix the tip without sliding. The presser shaft 5 is moved up and down by rotatively operating a handle 7, and by rotation of the handle 7, a shaft 12 is also rotated through engagement of gears 10, 11. The shaft 12 is fixed integrally with a knurled handle 13. In the bottom face of a sliding plate 14, a V-shaped notch is provided, and a pair of ball bearings 15 fitted thereto bear the outer peripheral surface of the circular piece tip.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for lapping a round piece chip for lathe processing.

[0002]

2. Description of the Related Art A round top chip is a cutting tool which is literally a round disk shape, and it is necessary to take care so that the shape of the disk does not collapse during re-polishing and the polishing surface is at a right angle. At present, no inexpensive and simple polishing tool dedicated to re-polishing has been put on the market, and it currently relies on human resources, but this is a task that requires considerable skill and cannot be done by anyone. . From the past, there has been a demand for a simple device that even an amateur can easily perform.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a jig for polishing a round-coma chip that can be easily attached and detached and has an extremely simple structure and can be precisely re-polished. is there.

[0004]

The above-mentioned problems are solved by the following structure. That is, 1. A rotatable receiving plate on which a round top chip for polishing is placed, a pressing shaft that integrally rotates by pressing the chip placed on the receiving plate from above, and slides left and right on the base on which the receiving plate is attached. A sliding plate that can move, an adjusting mechanism that can fix the sliding plate at an arbitrary position, a pair of left and right on the sliding plate, and an outer peripheral surface of a round top chip sandwiched between the receiving plate and the pressing shaft. A ball bearing arranged so as to be circumscribed and backed up is provided, and a brake mechanism for suppressing free rotation of the shaft is attached to a protruding portion of the shaft protruding outside of a base to which the pressing shaft is attached. This is a jig for polishing round top chips. 2. 2. The jig for polishing a round top chip according to 1 above, wherein the braking mechanism is such that the protruding portion of the pressing shaft is connected to a rotating shaft whose surface is knurled by a gear. 3. 3. The polishing jig as described in 1 or 2 above, wherein rubber is attached to the contact surface between the receiving plate and the round piece of the pressing shaft.

[0005]

The pressing shaft is pressed by the spring, and when the polishing round top chip is sandwiched between the pressing shaft and the pedestal, the bite is held by this pressing pressure.
If necessary, the portion of the press shaft that contacts the tip of the pedestal is covered with rubber, so the rubber deforms due to the pressing pressure, and the tip is held firmly and slippage is eliminated. The sandwiched tip is in a state of slightly protruding from the base to which the holding shaft and the receiving plate are attached, and this portion is pressed against the grindstone for polishing. When the tip is pressed against the grindstone, the protruding bite is naturally pushed in, but a pair of ball bearings attached to the sliding plate backs up this to prevent the tip from moving backward. The ball bearing is a kind of roller, and the outer periphery of the roller is in contact with the outer peripheral surface of the chip and rotates in conjunction with the rotation of the chip to back up the chip. The slide plate is pushed by a cap screw attached to the base so that the slide plate with the ball bearing does not move backward when the chip is pushed. Further, it is necessary to move the sliding plate to the left and right according to the size of the chip. At this time, the press screw is moved to adjust the position. When the chip is pressed against the grindstone during polishing, the chip simply rotates in accordance with the rotation of the grindstone and the chip is not polished. In order to polish, the peripheral speed of the tip must be slower than the peripheral speed of the grindstone. The brake mechanism of the present invention is for this purpose. As a brake mechanism for holding down the peripheral speed of the presser shaft, a brake material with a large friction is pressed against the shaft itself, or a process that increases the friction coefficient is performed on this shaft, for example, knurling etc. It may be pressed with a finger so that the rotation is appropriately lowered. Alternatively, a shaft dedicated to the brake may be separately provided, and this shaft may be connected to the holding shaft by a gear. In the present invention, a system in which a dedicated shaft for the brake is separately provided, the knuckle is knurled, and the rotation is reduced by pressing with a finger is the simplest and most effective mechanism. At this time, the brake shaft may be appropriately rotated in a direction opposite to the rotation direction of the grindstone for polishing.

[0006]

The present invention will be described with reference to the drawings. 1 to 4 are explanatory views of the structure of the present invention. 1 is a sectional view, and FIG. 2 is FIG.
3 is a top view of FIG. 1, and FIG. 4 is A of FIG.
FIG. In FIGS. 1, 2 and 3, the round piece to be ground is sandwiched between the holding shaft 5 and the pedestal 4, and the spring 8
Press down through. Since the rubber cap 6 is covered on the contact surface between the pressing shaft 5 and the round top chip of the pedestal 4, the rubber is deformed by the pressure of the spring and the chip is strongly pressed to prevent the chip from slipping. Cradle 4 is base (bottom) 1
It has a structure in which the outer ring of the rotating bearing is covered with a rubber cap by inserting the thrust bearing into the pin inserted into. This allows the rubber cap to rotate freely with the tip on top. A gear 10 and a handle 7 are fixed to the holding shaft 5, and the handle is pushed downward by a spring 8. At this time, the spring is fixed to the spring retainer 9, and the edges of the spring and the handle are cut, so that the spring does not move even when the shaft rotates, and the sliding contact surface between the spring and the handle simply slides. The shaft can be moved slightly up and down as shown in the figure.When sandwiching the tip, lift the shaft to widen the gap and insert the tip here, and when the shaft is lowered, the rubber cap at the tip of the shaft presses the tip and deforms And press strongly. The spring retainer 9 has a shape as shown in FIG. 2, and is fixed to the base (upper) 2. The holding shaft has a gear 10 and an adjacent shaft 12
Gears 11 are fixed to the respective shafts, and the two shafts are connected by this gear. A knurled handle 13 is fixed to the shaft 12, and when the pressing shaft rotates and the shaft 12 rotates in conjunction with this, the rotation of the shaft can be suppressed by pressing the knurled portion with a finger. FIG. 4 is an AA arrow view of FIG. 1, and is an explanatory view of the structure of the sliding plate. A V-shaped notch is provided on the bottom surface of the sliding plate 14, and a ball bearing 15 is attached at a position where the rotating portion of the bearing is slightly outward (shaded portion) outside the V-shaped notch. The sliding plate is moved by moving the adjusting screw 16. In the case of this figure, the ball bearing and the tip are not in contact with each other.
6 is moved to bring the ball bearing and the chip into contact with each other so that they can be backed up and polishing is started. For polishing, hold the base itself by hand and bring it close to the grindstone, and apply the chip to the grindstone. Alternatively, the base is attached to the base, and the base is moved to bring it close to the grindstone so that the tip is applied to the grindstone. When the tip hits the grindstone, the tip begins to rotate. At this time, if the knurled handle 13 is pressed with a finger to prevent rotation of the tip portion, a difference in peripheral speed occurs between the grindstone and the tip, and polishing is performed. If necessary, the knurled shaft can be rotated in the reverse direction for polishing. After polishing, lift the pressing shaft again and take out the chip. It is a matter of course that the brake mechanism of the present invention is not limited to only the knurling of this example, and all the usual means used for this type of application can be used.

[0007]

The jig of the present invention has the following features. 1. Operability is good and no skill is required. 2. It can be easily polished by anyone. 3. The polishing material can be fixed with one touch. 4. Manual polishing allows local polishing. 5. Compact and lightweight with an extremely simple structure. 6. Can be highly accurately polished. 7. Can be polished at low cost.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of the structure of the present invention.

FIG. 2 is a view taken along the line BB of FIG.

FIG. 3 is a top view of FIG.

FIG. 4 is a view on arrow AA of FIG. 1.

[Explanation of symbols]

 1 ... Base (bottom) 2 ... Base (top) 3 ... Base (side) 4 ... Receiving plate 5 ... Presser shaft 6 ... Rubber cap 7 ... Handle 8 ... Spring 9 ... Spring presser 10 ... Gear 11 ... Gear 12 … Shaft 13… Knurled handle 14… Sliding plate 15… Ball bearing 16… Screw

Claims (3)

[Claims] 1. A rotatable receiving plate on which a round piece for polishing is placed, a holding shaft for integrally turning the chip placed on the receiving plate from above, and a base to which the receiving plate is attached. A sliding plate that can slide on the left and right, an adjusting mechanism that can fix the sliding plate at any position, a pair of left and right on the sliding plate, and a circle sandwiched between the receiving plate and the pressing shaft. A brake which comprises a ball bearing arranged so as to be circumscribed and backed up on the outer peripheral surface of the top chip, and which restrains the free rotation of the shaft at the protruding portion of the shaft protruding outside the base to which the pressing shaft is attached. A jig for polishing round top chips, which is equipped with a mechanism. 2. The jig for polishing a round-coma chip according to claim 1, wherein the brake mechanism is one in which a protruding portion of the pressing shaft is connected to a rotary shaft whose surface is knurled by a gear. 3. The polishing jig according to claim 1, wherein a rubber is adhered to the contact surface between the receiving plate and the round top chip of the pressing shaft.