JPH047884Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a grinding machine.

[Summary of the idea]

The present invention uses a grinding machine in which a guide member with an inclined part formed on the lower side of the tip that moves up and down is provided so that the tip is placed near the tip of the shoe, and the workpiece is ground when pushed by the pusher. When the workpiece is fed to the position, the workpiece comes into contact with the inclined part and temporarily pushes up the tip of the guide member until it reaches the tip of the shoe, at which point the inclined part of the tip of the guide member is pushed downward. By moving the grinder, the workpieces are scraped off along the tip surface of the shoe, and the workpieces are fed to the grinding position, thereby making it possible to reliably feed the workpieces one by one.

[Conventional technology]

As shown in FIG. 13, a conventional grinding machine includes a lower roll 1 rotatably provided on a frame (not shown), and a lower roll 1 that is rotatable above the lower roll 1 and can approach and separate from the lower roll 1. The upper roll 2 is provided on the frame and its axial center is slightly shifted horizontally (to the left in the figure) from the axial center of the lower roll 1. A shoe 5 is disposed on the side (left side in the figure) and the opposite side (right side in the figure), and its tip surface contacts and directs the workpiece 4 supplied to the grinding position 3 between the upper and lower rolls 2 and 1. A workpiece 4 is placed at the grinding position 3 between these upper and lower rolls 2 and 1 and the shoe 5.
is instructed, and the inner circumferential surface of the workpiece 4 is ground using a rotating grindstone (not shown).

After the grinding process is completed, the pusher 7 supplies the unprocessed workpiece 4' to the grinding position 3 along the shoe 5, and at this time the processed workpiece 4'
is pushed by the unprocessed workpiece 4', pushes aside the elastic holding rod 8, and is discharged from the grinding position 3 to the outside of the machine (to the side of arrow A). At this time, the unprocessed workpiece 4' is held down by the elastic force of the holding rod 8 so that the unprocessed workpiece 4' is not discharged together with the processed workpiece 4.

[Problem that the invention attempts to solve]

However, since such conventional grinding machines are structured to feed the workpiece using the above-described workpiece feeding method, the workpiece may not be fed reliably. In other words, when the processed workpiece 4 is pushed by the unprocessed workpiece 4' and is ejected by pushing aside the elastic holding rod 8, it is fine if the diameter and width of the workpiece are sufficiently large, but if the diameter and width of the workpiece are small, When this happens, the holding rod 8 becomes very thin, making this adjustment difficult.

That is, as shown in FIG. 14, it is difficult to keep the angle θ at which the holding rod 8 contacts the workpiece 4' always in the same state, and if the angle θ at which the holding rod 8 contacts the workpiece 4' is incorrectly adjusted, the angle θ at which the holding rod 8 contacts the workpiece 4' may be incorrectly adjusted. In, Putsiya 7
Even when pushed, the unprocessed workpiece 4' does not fall to the grinding position 3 side along the tip surface of the pusher 5, and the unprocessed workpiece 4' is stuck to the tip surface of the pusher 7 with oil. There was a problem that the workpieces 4' could not be reliably fed one by one because they would not be fed to the grinding position 3 and would return together.

[Means for solving problems]

Therefore, in order to solve the above-mentioned problems, the present invention has a workpiece supply sliding surface formed, and a shoe that extends toward the grinding position between the workpiece rotation rolls and reciprocates along the supply sliding surface of the shoe. The pushers are provided opposite the pushers with the grinding position in between, and a concave two-step inclined surface facing the tip of the pushers is formed, and the inclined surfaces are installed so that they can move toward and away from one of the workpiece rotating rolls. and an actuating means for biasing the guide member elastically or forcibly in a direction in which the inclined surface approaches one of the workpiece rotation rolls.

[Effect]

According to the grinding machine having such a configuration, the tip of the guide member having the concave two-step inclined portion formed on the lower side of the tip that moves up and down is provided near the tip of the shoe;
When the workpiece is fed to the grinding position by being pushed by the pusher, the workpiece comes into contact with the inclined portion and temporarily pushes up the tip of the guide member, reaching the tip of the shoe, where the guide member By moving the inclined portion of the tip of the shoe downward, the workpiece is scraped downward along the tip surface of the shoe and is supplied to the grinding position. This effectively prevents unprocessed workpieces from being fed to the grinding position as in the past, getting soaked with oil at the tip of the pusher and being returned together, and making it possible to reliably feed the workpieces one by one. .

〔Example〕

Embodiments of the present invention will be described below based on the drawings. 1 to 4 are diagrams showing a first embodiment of a grinding machine according to the present invention.

First, the structure will be described. In FIG. 1, 10 is a lower roll rotatably provided on a frame 11 of an internal grinder. Above the lower roll 10, an upper roll 12 is rotatable and the lower roll 1
provided in the frame 11' so as to be able to approach and separate from 0;
The upper roll 12 is arranged so that its axial center is slightly shifted (h) to the left in the horizontal direction in the figure from the axial center of the lower roll 10.

In the vertical direction, an upper roll 12 and a lower roll 10
In the horizontal direction, the tip surface 16a is on the side where the upper roll 12 is shifted from the lower roll 10 (the left side in the figure) and the opposite side (the right side in the figure) A shoe 16 that abuts and supports a workpiece 15 supplied to a grinding position 17 between the two is fixedly arranged on the frame 11.

A pusher 18 is provided above the shoe 16 so as to be able to slide horizontally in the figure, and this pusher 18 pushes the unprocessed workpiece 15' along the shoe 16 and supplies it to the grinding position 17. It's summery.

As shown in FIG. 2, on the side of the upper roll 12,
That is, on the near side in FIG.
1 (guide member) is provided, and a two-stage inclined portion 21 is provided at the bottom of the tip of this work guide plate 21.
a, 21a' are formed. A stopper 23 is in contact with the lower side between the inclined portion 21a of the work guide plate 21 and the pin 20, and a tension spring 24 is further provided on the lower side between the stopper 23 and the pin 20. .

As shown in FIG. 2, upper and lower rolls 12, 10
The workpiece 15 whose outer peripheral surface is supported between the front plate 26 and the pressure rotor 28 has both end surfaces supported between the front plate 26 and the pressure rotor 28 . A grindstone 30 that rotates and grinds the inner peripheral surface 15a of the work 15 is arranged on the front plate 26 side of the work 15 so as to be movable in the horizontal direction in the figure.

Next, the effect will be explained. As shown in FIG. 3, the work 15 consists of two upper and lower rolls 12 and 10.
Grinding position 1 between and the tip surface 16a of the shoe 16
With the outer circumferential surface supported at three points by the rotating grindstone 30, the inner circumferential surface 15a is ground. At this time, the stopper 23 contacts the workpiece guide plate 21 so that the inclined portion 21a of the workpiece guide plate 21 is slightly separated from the workpiece 15 to restrict its swinging.

After that, as shown in FIG. 4, the upper roll 12 rises and separates from the workpiece 15, and the pusher 18 slides horizontally to the left in the figure.
The unprocessed workpiece 15' is pushed along the inclined portion 21a' and supplied to the grinding position 17 side.

At this time, the unprocessed workpiece 15' is pushed by the pusher 18 and moves along the shoe 16 and the sloped part 21a', and then comes into contact with the sloped part 21a of the workpiece guide plate 21, and the workpiece 15' moves along the sloped part 21a' of the workpiece guide plate 21. After the tip is temporarily pushed up (the state shown by the two-dot chain line), the tension spring 24 moves further and when the tip of the pusher 18 passes a position where it almost coincides with the tip surface 16a of the shoe 16.
As a result, the tip of the work guide plate 21 descends in an attempt to return to its original position, and at this time, the inclined portion 21
The workpiece 15' is pushed downward toward the grinding position 17 and scraped off from the tip surface of the pusher 18 along the tip surface 16a of the shovel 16. For this reason, the unprocessed workpiece 15' is guided downward by the two-stage inclined surface, so that the unprocessed workpiece 15' gets soaked with oil on the tip surface of the pusher 18 and returns together without being fed. The workpieces 15' can be reliably fed to the grinding position 17 one by one regardless of the diameter.

5 and 6 show a second embodiment of the present invention. In this second embodiment, an actuator 34 such as a hydraulic cylinder or a pneumatic cylinder is used instead of the tension spring 24 in the first embodiment, and a V-shaped protrusion 21b is provided on the lower side of the tip of the work guide plate 21. It is being As shown in FIG. 6, a forward inclined portion 21c is formed on the unprocessed workpiece 15' side of the V-shaped protrusion 21b of this work guide plate 21;
A rear inclined portion 21d is formed on the back side of c.

In this second embodiment, the unprocessed workpiece 1
5' is pushed by the pusher 18 to the grinding position 17.
When supplying to the first
It functions in the same way as the inclined portion 21a in the embodiment and reliably brings the unprocessed workpieces 15' one by one to the grinding position 1.
7. When the processed work 15 is pushed by the newly supplied unprocessed work 15' and discharged from the grinding position 17, as shown in FIG. is ejected after temporarily pushing up the V-shaped protrusion 21b (the state shown by the two-dot chain line),
Immediately after the processed workpiece 15 passes directly under the tip of the V-shaped protrusion 21b, the tip of the work guide plate 21 is lowered by the actuator 34 to return to its original position, and the V-shaped protrusion 21b connects with the processed workpiece 15. It cuts between it and the unprocessed workpiece 15' (the state shown by the solid line).

For this reason, the machined workpiece 15 is reliably separated from the unprocessed workpiece 15', and as shown in FIG. It is possible to prevent two pieces from being held down at the same time and to reliably discharge the pieces 15 one by one regardless of the diameter.

Note that although the supply and discharge have been described separately for convenience in the above, these operations are actually performed simultaneously.

7 to 9 show a third embodiment of the present invention. In the first embodiment, the tip of the work guide plate 21 was only moved up and down by the actuator 34, but in the third embodiment, as shown in FIG. In addition to moving up and down, the work guide plate 21 can also be moved horizontally by another actuator 35.

Therefore, according to the third embodiment, by moving the work guide plate 21 up and down, as shown in FIG. Not only is it possible to reliably separate the workpieces, but also as shown in FIG. 9, the workpiece guide plate 21 is moved in the direction of the horizontal arrow by the actuator 35, so that the processed workpieces 15 are forcibly moved to the discharge side. Regardless of the diameter, the workpiece 15 is
It is possible to discharge one by one more reliably than in the embodiment.

10 to 12 show a fourth embodiment of the present invention. In the previous embodiment, the pusher 18 simply pushed the unprocessed workpiece 15' with its tip, whereas in this fourth embodiment, as shown in FIG. A workpiece holding groove 18a is formed slightly inside, and an unprocessed workpiece 1 is placed inside this workpiece holding groove 18a.
5' is inserted one by one, and as shown in FIG. 11, the unprocessed workpiece 15' is pushed along the shoe 16 and transported to the grinding position 17. As shown in FIG. 12, the workpiece holding groove 18a is designed to hold the unprocessed workpiece 15' with a slight protrusion. Therefore, as shown in FIG. When 15' is moved to the vicinity directly above the grinding position 17,
The protruding portion of the unprocessed workpiece 15' comes into contact with the front inclined part 21c of the V-shaped protrusion 21b of the workpiece guide plate 21, and then the unprocessed workpiece 15' is moved in the same way as in the first and second embodiments. are reliably supplied one by one to the grinding position 17, and the processed workpiece 1
5 can be reliably discharged one by one.

According to this fourth embodiment, the unprocessed workpiece 1
5' into the workpiece holding groove 18a to ensure that the workpieces 15' are transported one by one to the grinding position 17 side. It is possible to prevent multiple pieces from collapsing and being fed at the same time.

In addition, in the second to fourth embodiments, the V-shaped protrusion 2
Although the lower tip of 1b is pointed, the tip may be rounded as long as the function of the V-shaped protrusion 21b is not impaired.

Further, in the above embodiment, the plate-shaped work guide plate 21 is used as the guide member, but other shapes, such as materials such as wire, may be used as long as the work guide plate 21 can function as a guide member as described above. It may be formed by bending.

Further, although the above embodiment has been described with respect to an internal grinding machine, the present invention is not limited to an internal grinding machine, and can be applied to other grinding machines, such as a grinding machine that grinds the outer peripheral surface of a cylindrical or cylindrical workpiece. You can.

Furthermore, although the above embodiment describes a grinding machine equipped with two rolls and one shoe, other types, such as a grinding machine with two shoes and one magnetic chuck, or a rotary support using static pressure (hydraulic pressure), may also be used. Any type of grinding machine may be used as long as it can obtain the effects of the present invention, such as a type having a part and one roll.

[Effect of idea]

As explained above, according to the present invention, workpieces can be reliably fed one by one regardless of the diameter.

Further, according to the second embodiment, in addition to the same effect as the first embodiment, it is possible to reliably discharge the workpieces one by one regardless of the diameter.

Furthermore, according to the third embodiment, the workpieces can be discharged one by one more reliably than in the second embodiment.

Furthermore, according to the fourth embodiment, it is possible to reliably prevent a plurality of workpieces from being fed at once from the unprocessed workpiece supply section to the front end surface of the pusher.

[Brief explanation of the drawing]

1 to 4 are views showing a first embodiment of the grinding machine according to the present invention, in which FIG. 1 is a front view of the main parts thereof, FIG. 2 is a side sectional view of the main parts shown in FIG. 1, and FIG. Figure 3,
Figure 4 is an enlarged view of the workpiece periphery of the grinding machine shown in Figure 1, and Figures 5 and 6 are the second view of the grinding machine according to the present invention.
FIG. 5 is a front view of the main parts, FIG. 6 is an enlarged view of the workpiece periphery showing its operation, and FIGS. 7 to 9 show a third embodiment of the grinding machine according to the present invention. FIGS. 10 to 12 are front views of the main parts shown, and are views showing a fourth embodiment of the grinding machine according to the present invention,
Figures 10 and 11 are front views of the main parts, Figure 12
The figure is a plan view of the main parts, Figs. 13 to 16 are diagrams showing a conventional grinding machine, Fig. 13 is a front view of the main parts, and Figs. 14 to 16 are enlarged views of the workpiece periphery showing its operation. It is a diagram. 10... lower roll, 11, 11'... frame,
12...Top roll, 15...Work, 15a...
Inner peripheral surface, 15'...Unprocessed workpiece, 16...Show, 16a...Tip surface, 17...Grinding position, 1
8... Pusher, 18a... Work holding groove, 2
0... Pin, 21... Work guide plate, 2
1a... Inclined portion, 21b... V-shaped protrusion, 21c...
...Front inclined part, 21d... Backward inclined part, 23...
Stopper, 24...Tension spring, 26...Front plate, 28...Pressure rotor, 3
0... Grindstone, 34, 35... Actuator.

Claims (1)

[Scope of utility model registration request] A workpiece supply sliding surface is formed, and a shoe that extends toward the grinding position between the workpiece rotation rolls;
A pusher reciprocates along the supply sliding surface of the shoe, and a concave two-step inclined surface is formed, which is provided opposite the pusher across the grinding position and faces the tip of the pusher, and the inclined surface is attached to one workpiece. a guide member attached to the rotating roll so as to be able to move toward and away from the rotating roll; and an actuating means for elastically or forcibly biasing the guide member in a direction in which the inclined surface approaches the one workpiece rotating roll. A grinding machine characterized by: