JPH0319765A - Method and device for rotating workpiece utilizing disk - Google Patents

Abstract

PURPOSE:To apply cylindrical grinding concentrically accurately to the internal and external diameters of an optical connector part by holding a workpiece in the vicinity of its diameter with disks and rotating the workpiece. CONSTITUTION:Since rotation of a spindle 20 is stopped, all the parts in a spindle surface plate 19 are placed in a stationary condition. Under this condition, because a main unit 6 is pulled by a tensile spring 16 toward a balancer 8, when disks 1-a, 1-b are sufficiently mounted to a spindle center 22 so that a workpiece 21 can be easily inserted, the workpiece is held by a tail center paired with both the centers. Then the spindle 20 is started to perform throwup- rotation in the counterclockwise direction. Next, when the rotation reaches a certain rotary speed, the main unit 6 is moved by its own centrifugal force toward the periphery against force of the tensile spring 16, and following this action, the disks 1-a, 1-b hold the workpiece 21 rotated in the counterclockwise direction. Next a grindstone approaches from the right to grind the workpiece 21 in the predetermined dimension.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method and a rotating device for rotating a workpiece to be ground in cylindrical grinding with support from both centers.

In recent years, in the field of cylindrical grinding, precision is required not only in the outer diameter ($fl1), as in optical connector parts, but also in the inner and outer diameters, such as in coaxial shafts.

What is this process in general? The fL grinding body is supported at both centers of the Enjo grinding machine, and the body to be ground is held and rotated by a manual or automatic kere [rotating device] for grinding.

The sensitivity of the grinding machine is the same as that of the Enka grinder, and the tuff of the machine is extremely important.

Particularly in the case of automatic kerning, the higher precision of kerning corresponds to the increased complexity, and in practical terms, maintenance has become increasingly troublesome.

Therefore, there is a need for an automatic rotation device that is highly accurate and purely horizontal.

・Conventional Techniques Until now, only a few technologies have been provided for the @ dynamic rotation device for the object to be cut. Typical examples include [1] those that transmit the rotation of the spindle to the object to be ground using a cam, link mtx, etc., and [2] those that grip the object to be ground by using the inertia of a rotating weight. It will be done.

For example, from the point of view of obtaining accuracy of the inner and outer diameters such as with coaxial leather, [1] is due to the eccentric load caused by forceful clamping, and the object to be ground lifts from both centers, and it is Inryu who obtains the above-mentioned accuracy.
Since the clamp part bites into the M grinding body, it is not necessarily possible to release the ground body after grinding is completed. In addition, [2] has a surisop-like grip that does not force the rotation of the imprinting body, so the rotational force of the spindle is not sufficiently transmitted, and there may be excessive slippage, making it impossible to obtain roundness.

Thus, i;I: The prior art had serious drawbacks.

・Issues to be solved In order to obtain Iil 1 degree of the inner and outer diameters such as coaxiality, it is necessary to securely clamp the object to be ground without lifting it from both centers and transmit the rotation of the main shaft. This is due to eccentricity. It is essential to minimize both the load and the rotational slip. Furthermore, the object to be ground can be opened without fail after grinding is completed.
This is an indispensable requirement for TM cutting.

・Means of Section Expense Determination Figure 4 [Principle Diagram] describes the phenomenon discovered by the applicant. 2
Conical-shaped roller 31 {Mawaki wall 34-a. It is in contact with b and Shitakabe 33.

Place the roller 32 parallel to the roller 31 and rotate the roller 32 without applying a slight load to the roller 32 with your fingertips.

If the diameter of the roller 32 is changed and the same operation is continued, the roller 32 will become extremely difficult to rotate due to a certain diameter.

At that time, the mutual angle θ was V-38 degrees.

In other words, if the tangent of the contact area between the rollers 3i and 32 is at an angle lj with the normal culm or less, the roller 32 will be almost unable to rotate.In addition, if the roller 32 is pulled upward in this state, the roller 32 will rotate without any resistance.
Move away from 31.

And the change in the angle θ is such that the armpit wall 34 is slightly tilted C3.
Even if the distance is 0.2 mm at 0 mm, it can be ignored.

These means are used to solve the problem.

・Example Figure 1 is a front view, Figure 2 is an A-A diagram, and Figure 3 is a front view.
The figure is an E-B diagram.

Yen fil-a. b is the pair ji L. Then, the grinding body 21 is clamped (1), 3, and 2, and the main body 6 is clamped with 8 degrees of backlash. Lower wall 3, Illll wall 4, upper holy 5 is disk 1
- It is processed into the main body 6 to control the movements of a and b.

Here, the relationship between the outer diameters of l[llI 1 4 and the diameter of circle 1] a and b and the diameter of the object to be ground 21, as well as the ltl width of disks 1-a and b and its limitations will be described.

First of all, regarding the former, the machining tolerance width of the chuck portion of the object to be ground 21 is usually within 0.1 mm. The diameter at the maximum tolerance and the tangent line of the tlM part of the disks 1-a, b are within 8 degrees from the normal line, and the diameter at the minimum tolerance is such that the metal plate is not removed from the disks 1-a, b. with the width of ffill4 and disk 1~a,
Calculate the size of b. Of course, it goes without saying that the processability should be taken into consideration at this time. Next, the latter disk 1-a, b
There is a restriction on the movement of the captured object 2l is disk 1.
-a. When it is parallel to the outer periphery of b (perpendicular to the plane of the paper), the disks 1a and b sandwich the object to be ground 21 between the lower wall 3 and the side wall 4, and the object to be ground 2t does not rotate. When the object 21 to be ground is not parallel to the disks 1 and b (not perpendicular to the plane of the paper), the object 21 to be ground rotates clockwise, for example, and the disk 1
- Only a rotates counterclockwise and the auction starts. Therefore, when the play in the inner diameter of the disk 1-a is small, the object to be ground 21 is held between the outer diameter of the screw 2 and the side wall 4, and when the play is large, the object to be ground 21 is held between the IIll wall 4 and the upper wall 5.

At this time, the distance between the disks 3-a and the circle M]-1) increases by several μm, but this does not affect the gripping of the object to be ground 2l.

Adjustment J11 is about ±0.2 with push screw 12 and pull screw 13.
Maximum size of the chuck part of the object to be ground 21 when opening/closing mm,
In order to prevent 1 grinding body 2t from rotating when leaving, circle L9 1-B,
Adjust the distance between b.

The guide full 24.25 is 4.8 from the guide 14.15. m
Guide the main body 6 to the bottom root 7 for about m length i4. When attached with i5, the main body 6 can slide over its entire length, and the movement of the main body 6 from side to side is restricted to some extent.

The balancer 8 has a built-in square piece 17 and an adjustment screw i8 for balancing the weight with the main body 6 and adjusting the tension force i6, and is fixed to [i7] with a screw 9.

Therefore, the tension spring 16 pulls the main body 6 into the parallelism 8 lul1
Far JC when rotating the main body 6 with Niyuki Tomi ■t
It plays the role of adjusting the force.

, circle il-a. so that the wave cutting body 21 can be inserted into the spindle center 22 in the second state. i) has sufficient clearance and the through hole 26 is machined into the main body 6 to be sufficiently large.

The center relief hole 27 is inserted into the main shaft 7 contact 22 when the bottom root 7 is taken into the main shaft 4 groove 23 through the screw 10 and the main shaft 4 groove 23.
This is to prevent 11M. [One main shaft surface root is a protective cover for the main shaft 20 and is normally attached with a rotating rod for manual cutting: a "cutting"] Next, the actual movement will be described.

Now, since the rotation of the spindle 20 has stopped, all the parts on one spindle surface root are stationary.

In this state, the main body 6 is pulled toward the puller 8 by the tension panel 16, so the discs 1-a and b are held close to the object 21 to be ground.
is sufficiently far away from the center of the spindle center 22 so that it can be inserted through a certain hole. When the Km cutting body 21 is loaded into the spindle center 22, it is removed from the tail center located opposite to both centers.

Then Lord! IIl20 starts rotating counterclockwise to perform slow amplification. When you reach a certain rotation speed * {4;
6 +. r The force from the far side pulls the circle i1-a. b grips the object to be ground 4:2t, and the object to be ground 21 rotates counterclockwise.

A grindstone (not shown) is closer to the right side of FIG. 1 and grinds the object 2l to be ground to a predetermined size. After the grinding is completed, the grindstone 20 stops and all the parts return to their initial states. That is, the main body 6 is drawn toward the balancer 8, and the discs 1-a and b are separated from the workpiece 2l.The tenor center is bowed and the workpiece 2i is separated from the main shaft 7-tor 22, and the workpiece 2i is cut in a row. The cycle ends.

As described above, the principle of making ΦIJ according to the present invention is simple, so it is possible to use fX in many ways, and not just as a self-inflicted mistake.

FIG. 5 shows the case of manual tearing.

Conventionally, a ring-shaped manual burr was fixed to the object to be ground 2l by screwing, and when releasing the M, it was necessary to loosen the burr, which was troublesome. The manual chipping can be done by simply inserting the object to be ground 21 and inserting the hook part 38 into the rotary rod on the root of the main axis.

7 When the object to be cut 21 is supported between the main shaft center and the tail center and the main shaft is rotated, the manual chipping also rotates and the i-part 35
moves in the outer circumferential direction with the force of A7 from itself, and the disk 1 is ground to be ground 2
Hold and rotate t. When the rotation of the spindle stops after grinding is completed, the Bk body 35 is simply pushed toward the center and the object to be ground 2 is removed.
Bring l to MTi.

The push screw 36 and the pull screw 37 are used to adjust the gap between the disks 1 when they are held.

FIG. 6 shows the case of rotation in only one direction, in which a small angled taper portion 42 is provided on the 1I body 41 in place of one of the disks. [In the case shown, clockwise rotation] Fig. 7 shows a cylindrical rotary tool.

Conventional round-shaped rotary tools include pipe wrenches, but they are not suitable for decorated round cocoons because they cause damage when rotated. Since this tool holds the circular concise body 49 between the disc 1 and the tool, the occurrence of deviation is extremely small.

'A' of the clamping interval of the disc 1 to match the diameter of the round body 49.
There is a nursery room next to it. Taper the movable piece 46 on which the disc 1 is mounted, and push in the finger press portion 48 of the adjustment piece 47 to make the adjustment.

Figure 8 shows the jl of the workpiece when the workpiece is relatively soft.
IV radiation is shown.

If the hardness of the object to be ground is small, the discs that hold it will dig into it, and the M release at the end of the grinding process will lose its effectiveness.

There is a solution using rotational inertia and a cam.

This diagram is based on Figures 1 and 2.3.

A circular cam 58 is formed on the back of the main body 6. The bottom root 7 has a guide that guides the cam follower 57, 5 yen and a guide 5.
The guide J56 for 5 is processed.

Cam follower 57, guide 55 is 8 guide J59.5
f1 is inserted into the inertia ring 60 through the inertia ring 60. The inertia ring 60 is regulated by the guide 6t of the craftsman 7 while the guide j
It can rotate by a length of %56.59.

Next, regarding the operation, when the main shaft rotates, the bottom lever 7 also rotates, and the inertia ring 60 is defeated by the force L flow 4 lower 57.
(It separates from the main body 6. The main body 6 faces the outer periphery, clamps the object to be ground, and grinds it. After the turning turn is completed, the rotation of the earth shaft stops and the inertia ring 60 attempts to return to the initial state.

That is, the cam follower 57 pushes the circular cam 58 of the main body 6, and the main body 6 is forcibly moved toward the center, releasing the Fi grinding body VI.

Figures 10 and 11 are based on Figures 1, 2 and 3 of the embodiment and show an example of the main body 6 next to the clamping interval adjustment machine for the disc 1.

In FIG. 10, a guide portion 69 is machined on the main body 6, and the position W of the moving Φh table 65 on which the disc 1 is mounted is determined by the adjustment screw 7Q and fixed by the set screw 66.

In FIG. 1l, the guides are tapered, and a guide bar 72 prevents mutual displacement.

[Brief explanation of the drawing]

Figure 1 is a front view of a practical example of the invention, and Figure 2 is its A-A.
The sectional view, FIG. 3, is a BB cross-sectional view. FIG. 4 is a diagram of the operating principle, and FIG. 5 is a front view of another embodiment. FIG. 6 is a partial view of an embodiment developed from FIG. 5, and FIG. 7 is a front view of yet another embodiment. 8 to 11 are developed versions of the embodiments shown in FIGS. 1 to 3. FIG. 8 is a front view, and FIG. 9 is a cross-sectional view taken along line A-A. The figure is a partial view.・More than the effects of the invention As stated above, the rotating device of the present invention has a simple principle of horizontal forming operation, so it is low cost and requires no special maintenance, and can be used for manual and automatic circular grinding processing. Achieved high-quality processing 11 1 2 Procedural amendments

Claims (1)

[Scope of Claims] 1) A method of rotating an object to be ground by sandwiching the vicinity of the diameter of the object between disks 2] A method of rotating an object to be ground by holding the object near its diameter between disks 2] A method that includes a function of adjusting the gap between a disk and a wall that restricts the movement of the disk and the disk. A rotation device for a ground object characterized by having