JPH074755B2 - Polishing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing device, and more specifically, to a roller or the like (cylindrical shape, cylindrical shape, stepped shape with different diameters thereof) which is made of metal, resin, or ceramics and requires surface polishing. The shape of the polishing machine is not limited as long as it can be rotated and polished by means such as), and a rotating grindstone is brought into contact with the grinding wheel at a predetermined pressure to carry out polishing.

[0002]

2. Description of the Related Art In order to polish the surface of a roller or the like, the roller is rotated, and a grindstone is directly brought into contact with the surface of the roller with a predetermined pressure. If the roundness of the roller deteriorates due to the roundness error caused by the wear of the roller once used, it is impossible to fix the position of the grindstone abutting against the roundness and perform polishing. Therefore, in consideration of such a situation, the grindstone can follow the radial direction of the roller according to the different diameter of the roller.

As a method of following a grindstone to such a roller, for example, a technique disclosed in Japanese Patent Publication No. 51-46315 is known. This polishing apparatus is a so-called balance type polishing apparatus, and a traveling base is mounted on the apparatus main body so as to be movable in parallel to the axial direction of the object to be polished, and the traveling base is provided with the traveling base. A support column is movably mounted in the front-rear direction with respect to the object, and a swing arm is pivotally supported on the support column so as to be swingable about a horizontal axis parallel to the axial direction of the object to be polished. A grindstone is provided at one end of the swing arm, a heavy load such as a drive motor is placed at the other end, and a balance weight is movably and fixedly provided on the swing arm. The fixing of the pivotal support of the arm is released, the swinging arm is tilted, and the grindstone is brought into contact with the roller at a predetermined pressure (due to the restoring force of a spring described later).

The position adjustment of the balance weight and the pivotal fixing and releasing of the swing arm are performed by operating a lever. The grindstone is configured to follow a different diameter of the roller by the swinging arm in the balanced state and the contacting reaction force of the spring.

[0005]

According to the above-mentioned prior art, the contact pressure of the grindstone is adjusted according to the diameter of the roller, which is the object to be polished, or the degree of polishing (roughness, mirror surface, etc.). However, manual adjustment is very troublesome, and
In the case of a relatively large polishing device, the swing arm is heavy and is located at a high position, which makes it more difficult to handle and there is a problem that it cannot be adjusted by one person. Therefore, in order to solve such a problem, it has been considered to make it possible to perform remote control by using a driving means such as an electric motor. Most importantly, in order to tilt the swing arm at a predetermined angle,
The pivot shaft must be rotated, but the easiest way to do this is to connect drive means, such as an electric motor, directly to the pivot shaft (via a gear).
However, in this case, there are the following problems.

That is, when the pivot shaft is substantially directly connected to the electric motor, the spring for supporting the above-mentioned grindstone when the grindstone contacts the roller by tilting the swing arm to a predetermined position. It cannot detect the quantitatively compressed balance state. Even if it is possible to stop the electric motor by detecting that the whetstone has come into contact with the roller by visual inspection, as long as the electric motor is substantially directly connected to the pivot shaft of the swing arm, Since the tilted position of the arm is fixed, the follow-up is performed only within the range of expansion and contraction of the spring with reference to the roller position with which the grindstone is in contact.

Therefore, when the grindstone comes into contact with a portion having a diameter smaller or larger than the detection position of the roller, expansion and contraction of the spring occurs and the contact reaction force of the grindstone with respect to the roller changes strongly, resulting in the roller. Therefore, the degree of polishing cannot be maintained constant within a desired range, resulting in uneven polishing accuracy. The present invention solves the problems of the prior art and improves the polishing accuracy for an object to be polished, and at the same time, corresponds to the object to be polished (different diameter) or the grinding stone (finishing degree). The purpose is to enable automatic remote control of position adjustment.

[0008]

In order to solve the above-mentioned problems of the prior art, the polishing apparatus according to the present invention, as described in claim (1), rotationally drives an object to be polished around a substantially horizontal axis. The object-to-be-polished object driving means is provided in the apparatus main body, and the traveling base is mounted on the apparatus main body so as to be movable parallel to the axial direction of the object to be polished. A pillar is erected so as to move toward and away from the pillar, and a pivot shaft having an axis parallel to the axis of the object to be polished is provided in the vicinity of the upper end of the pillar so that the pivot shaft cannot rotate. A whetstone drive that pivotally supports a substantially central position of the rocking arm and movably and vertically fixes the pivot shaft, and a grindstone is rotatably provided at a tip of the rocking arm, and the grindstone is rotationally driven. Means for urging the grindstone toward the object to be polished at all times, and the swing arm has a bar. In a polishing apparatus in which a weight is movably fixed, and the grindstone is balanced with a predetermined contact pressure with respect to an object to be polished, the swing arm side is orthogonal to the pivot shaft. A screw shaft is rotatably provided above the pivot shaft, a balance adjusting electric motor is connected to the screw shaft, a rocking operation body is screwed onto the screw shaft, and the rocking shaft is attached to the rocking operation body. A pivot pin that is orthogonal to the axis is provided, and an abutment body that slidably contacts the rocking operation body is provided so as to be slidably contactable to the rocking operation body at one side of the pivot shaft. Is pivotally supported on a holding block that is relatively displaceably held by the abutment body, and at least after the abutment body of the pivot shaft and the rocking operation body are abutted by the rocking operation body. Provided with a detection switch for detecting a slight distance from the body, and by operating the detection switch The Nsu adjusting electric motor is obtained by configured to control drive.

The drive control of the balance adjusting electric motor may be such that the drive is stopped by giving a predetermined time lag based on the operation of the detection switch, or the swing operation body is slightly moved from the contact body. If the distance to be separated is a sufficient distance to secure the balance required by the present invention (the grindstone can follow an object to be polished having a different diameter with a predetermined contact pressure), the time lag is not given. The drive may be stopped immediately, and the same effect can be obtained as a result. The whetstone driving means for rotationally driving the whetstone may be arranged such that an electric motor is arranged at the front end of the swing arm and directly connected to the drive shaft of the whetstone, or an electric motor is arranged at the birth of the swing arm. Then, it may be configured to be driven by a belt drive.

Further, as described in claim (2) of the present invention, the balance weight is screwed to a rotary shaft rotatably mounted in the longitudinal direction of the swing arm, and the balance weight is attached to the rotary shaft. It is the one that is connected with an electric motor.

Further, as set forth in claim (3) of the present invention, in order to movably and vertically fix the pivot shaft, foolish holes penetrating both ends of the pivot shaft in the vertical direction are provided. Provided, a threaded portion is provided on the inner periphery of the fool hole, and a rotating shaft having a threaded portion screwed into the threaded portion at the upper end is erected on the column,
The lower end of the rotating shaft was interlocked with an electric motor for vertical movement via a gear transmission mechanism.

[0012]

According to the polishing apparatus of the present invention described above, the screw shaft is driven in one direction by the electric motor for balance adjustment, and the rocking operation body screwed onto the screw shaft is relatively moved to cause the rocking motion. Swing arm (also electric motor for balance adjustment) by pushing an abutment body that is slidably in contact with the operating body, and the abutment body being integrally provided on a pivot shaft that is non-rotatably provided on the column. The side pivots relative to the pivot shaft and swings forward and downward. As a result, when the grindstone comes into contact with the object to be polished (the position of the balance weight is adjusted before this to obtain the required contact pressure of the grindstone), the biasing means of the grindstone displaces pressure. , When the predetermined reaction force increases until it acts to lift the swing arm upward, just
The swing arm is prevented from swinging to the lower front and is in the same state as being fixed. Therefore, the swing operating body cannot perform the action of relatively pushing the contact body, and as a result, , Away from the abutment body that has become the fixed side. The drive of the balance adjusting electric motor is controlled (immediate stop or stop by giving a time lag) by detecting the separation of the swinging operation body from the contact body.

Therefore, when the balance adjusting electric motor is stopped, the swing operation body is located away from the contact body. This means that the wobbling arm moves around the predetermined balance state in which the grindstone is in contact with the object to be polished with a predetermined contact pressure based on the restoring force of the balance weight and the biasing means. It means having a swingable range in the vertical direction. Therefore, when the grindstone is positioned at a large diameter portion or a small diameter portion having different diameters, the swing arm itself can swing and follow without changing the pressure of the biasing means. Thus, the balance of the grindstone under a predetermined contact pressure with respect to the object to be polished, despite the remote control by the electric motor for balance adjustment, the predetermined contact pressure is substantially constant to enhance the polishing accuracy,
The unevenness can be almost eliminated.

Further, as described in claim (2), the balance weight is screwed onto a rotary shaft rotatably mounted in the longitudinal direction of the swing arm, and the balance shaft is driven by an electric motor for balance weight. If the balance weight is connected, the position adjustment of the balance weight (adjustment of the contact pressure of the grindstone) can be performed remotely and the balance weight itself can be directly driven without using a gear or the like, so that the swing can be simplified. . Further, according to the structure as described in claim (3),
The vertical movement of the entire swing arm can also be remotely controlled by the vertical movement transmission motor, and the tilt angle of the swing arm caused by the size of the object to be polished can be easily adjusted to a required angle.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the polishing apparatus according to the present invention will be described in detail below with reference to FIGS.

Here, a metal roll R is used as the object to be polished.
Was used. The basic configuration of this polishing apparatus is that the apparatus main body (not shown) is provided with an object-to-be-polished driving means that is rotationally driven about a substantially horizontal axis. This polishing object driving means belongs to the prior art, and although detailed description is omitted, both ends of the metal roll R are rotatably supported and one end thereof is driven by an electric motor built in the apparatus main body. The metal roll R is configured to rotate.

As shown in FIGS. 2 to 4, a traveling rail is provided in the apparatus body, and a traveling base 3 is provided on the traveling rail so as to be movable in parallel to the axial direction of the metal roll R. There is. The movement of the traveling base 3 is performed by screwing a screw shaft 4 that is driven to rotate on the apparatus body side and a female screw 5 provided on the side of the traveling base 3. The traveling base 3
A pair of support columns 6 and 6 are erected on the. Further, the pillars 6 are provided so as to be able to approach and separate from the metal roll R. As a structure for this, a guide rail 7 is provided on the traveling base 3, and the support columns 6 and 6 are provided on the guide rail 7.
Is provided, and the screw members 7 of the columns 6 are screwed onto the drive shaft 8, and the drive shaft 8 is driven by the electric motor 9. In the vicinity of the upper ends of the stanchions 6 and 6, a pivot shaft 1 that pivotally supports a substantially central position of the swing arm 10.
1 is non-rotatably provided. The pivot shaft 11 has a horizontal axis parallel to the axis of the metal roll R.

Further, the pivot shaft 11 is provided so as to be movable and fixed in the vertical direction. As a structure for this purpose, a fool hole 11a is provided which penetrates both ends of the pivot shaft 11 in the vertical direction, and a screw portion 11b is provided on the inner circumference of the fool hole 11a.
And screw parts 12a and 12 which are screwed into the screw part 11b.
A rotating shaft 12 having an upper end a is provided upright on the support column 6 and the lower end of the rotating shaft 12 has a gear transmission mechanism 13.
There is provided a configuration in which the electric motor 13 'for vertical movement is interlocked and connected via the.

As shown in FIG. 7, a grindstone 14 is rotatably provided at the tip of the swing arm 10. The grindstone 14 is fitted to a rotary shaft 15 and bolted, and the rotary shaft 15 is rotatably provided on a grindstone head 16. Further, the grindstone 14 is always a metal roll R.
A spring 17 is provided as a biasing means for biasing the side. This spring 17 is
However, the grindstone head 1 can be displaced in the axial direction thereof.
6 is provided. A grindstone driving means 18 is provided to drive the grindstone 14 to rotate. The grindstone driving means 18 is composed of an electric motor 18a provided at the rear end of the swing arm 10 and a belt transmission mechanism 18b for driving the rotary shaft 15 by the electric motor 18a.

A balance weight 19 for adjusting the polishing pressure is movably fixed on the upper surface of the swing arm 10. As a structure for this purpose, a rotary shaft 20 which is rotatably mounted in the longitudinal direction of the swing arm 10 is provided, and the rotary shaft 20 is attached to the balance weight 1.
9, a balance weight electric motor 21 is connected to the rotary shaft 20 by screwing the female screw 19a provided on the rotary shaft 20. Thus, the balance weight 19 is moved by the rotation of the rotary shaft 20.

As shown in FIGS. 3 and 4, a screw shaft 22 orthogonal to the pivot shaft 11 is rotatably provided above the pivot shaft 11 on the swing arm 10 side. A balance swing arm up-and-down electric motor 23 is connected to 22, and a swing operation body 24 is screwed onto the screw shaft 22. The swing operation body 24 is provided with pivot pins 25, 25 orthogonal to the axis of the screw shaft 22, and an abutment body 26 slidably contacting the swing operation body 24 is provided on one side of the pivot shaft 11. It is provided so as to be capable of sliding contact with the rocking operation body 24. The pivot pin 25
25 is pivotally supported on a holding block 27 which is held on the abutment body 26 so as to be relatively displaceable. A blocking body 28 for blocking the backward movement of the rocking operation body 24 is provided on the rear side of the screw shaft 22 on the opposite side of the rocking body 26, and the rocking operation body 24 is blocked by the contact body 26 and the blocking body. It is configured so that it can be moved only to and from 28.

Further, as shown in FIG.
A detection switch 29 is provided to detect that 4 is positioned substantially in the middle of the contact body 26 and the blocking body 28 (the distance between them is approximately 5 mm to 10 mm). The operation of the detection switch 29 is configured to stop driving of the electric motor for balance adjustment.

As shown in FIGS. 3 and 4, limit switches 30 and 31 for specifying the upper limit and the lower limit of the swing of the swing arm 10 are provided, and these are operated by the vertical movement of the swing arm 10. It

Next, referring to FIGS. 1 to 6, the grindstone 14
The operation for balancing the will be described. In order to lower the required set grindstone 14, first, the swing arm up / down electric motor 23 is rotated counterclockwise,
The swing arm 10 fixed to the pivot 11 starts descending due to the weight of the balance weight 19. The abutment body 26 is fixed to the pivot shaft 11 by a key so as not to rotate, the balance adjusting electric motor 23 and the screw shaft 22 are connected by a key, and the other end of the screw shaft 22 is connected. The side is held by the swing operation body 24 and the holding block 27.

Until the grindstone 14 contacts the all-purpose roll R, which is the object to be polished, the slide surfaces of the holding blocks 27 on both sides of the rocking operation body 24 with which the screw shaft 22 is screwed are in contact with the contact body. I am at 26. In this state, the swing arm 10 does not move up or down unless the screw shaft 22 rotates. Next, when the grindstone 14 is in contact with the metal roll R and the balance adjusting electric motor 23 is rotated counterclockwise in the descending direction while the grindstone 14 is not descending any more, the swing operation body 24 is moved to the right. As a result, a gap L is formed between the holding block 27 and the abutment body 26, and the swing arm 10 is in a balanced state (see FIG. 6). This balance state is detected by the detection switch 29 operated by the displacement of the swing block 27, and thus the balance adjustment electric motor 23 is stopped.

[0026]

According to the present invention, according to the structure described in claim (1), in the balance setting of the swing arm provided with the grindstone, it is possible to easily remotely operate the swing arm by the electric motor. . Further, according to the configuration described in claim (2), the position adjustment of the balance weight can be easily performed by the electric motor, and the drive thereof is performed by the simple screw shaft without using the worm gear, which is advantageous in that it can be provided at low cost. There is. Furthermore,
With the configuration according to claim (3), the large and small objects to be polished can be remotely operated by the electric motor to adjust the vertical movement of the entire swing arm to quickly adjust the balance.
Further, according to the configuration described in claim (4), there is an advantage that the balance area can be automatically secured in the up-and-down direction around the state where the swing arm provided with the grindstone is in contact with the object to be polished.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional front view of an entire polishing apparatus of the present invention.

FIG. 2 is an overall side view of a main part of the polishing apparatus of the present invention.

FIG. 3 is an enlarged vertical sectional front view of a main part of the polishing apparatus of the present invention.

FIG. 4 is an enlarged vertical sectional side view of a main part of the polishing apparatus of the present invention.

FIG. 5 is a vertical cross-sectional plan view of essential parts showing a lowering operation state of the swing arm of the polishing apparatus of the present invention.

FIG. 6 is a vertical cross-sectional plan view of essential parts showing a balance operation state of the swing arm of the polishing apparatus of the present invention.

FIG. 7 is an enlarged vertical sectional front view of the grindstone head of the polishing apparatus of the present invention.

[Explanation of symbols]

 3 Traveling base 6 Support 10 Swing arm 11 Pivot shaft 14 Grindstone 29 Detection switch

Claims (3)

[Claims] 1. An apparatus main body is provided with an object-to-be-polished driving means for rotationally driving an object to be polished about a horizontal axis, and the apparatus main body is provided with:
A traveling base is placed movably in parallel to the axis of the object to be polished, and a column is erected on the traveling base so as to move toward and away from the object to be polished. In the vicinity of the upper end, a pivot shaft having an axis parallel to the axis of the object to be polished is non-rotatably provided, and the pivot shaft is pivotally supported at a substantially central position of the swing arm and the pivot shaft is A whetstone is rotatably provided in the up-and-down direction, a whetstone is rotatably provided at the tip of the swing arm, whetstone driving means for rotatably driving the whetstone is provided, and the whetstone is constantly urged toward the workpiece. In the polishing apparatus, a biasing means is provided, a balance weight is movably fixed to the swing arm, and the grindstone is balanced with a predetermined contact pressure against the object to be polished. On the side, a screw shaft orthogonal to the pivot shaft is rotatably provided above the pivot shaft, A balance adjusting electric motor is connected to the screw shaft, a swing operating body is screwed onto the screw shaft, and a pivot pin that is orthogonal to the axis of the screw shaft is provided on the swing operating body. An abutment body slidably contacting with the pivot support shaft is fixedly provided on one side of the pivot shaft so as to be slidably contactable with the swing operation body, and the pivot pin is provided on a holding block which is relatively displaceably held by the abutment body. A detection switch that pivotally supports and detects that the rocking operation body is slightly separated from the abutment body after at least abutment of the abutment body of the pivot shaft and the rocking operation body; A polishing apparatus configured to drive and control the electric motor for balance adjustment by operating a detection switch. 2. The polishing according to claim 1, wherein the balance weight is screwed onto a rotary shaft rotatably mounted in the longitudinal direction of the swing arm, and an electric motor for balance weight is connected to the rotary shaft. apparatus. 3. To provide the pivot shaft so as to be movable and fixed in the up-down direction, a stuple hole penetrating both ends of the pivot shaft in the up-down direction is provided, and a screw portion is provided at an inner circumference of the stuple hole. 3. A rotating shaft having a threaded portion at an upper end that is screwed into the threaded portion is erected on the column, and a lower end of the rotating shaft is interlocked with a vertical movement transmission motor through a gear transmission mechanism. The polishing apparatus according to.