JPH05212674A - Dresser unit in surface grinding machine - Google Patents

Abstract

PURPOSE:To provide a dresser unit which is able to mold a dress part in a grinding wheel into a straight line. CONSTITUTION:In a surface grinding machine which is made up of installing a table 19 free of movements in both cross and longitudinal directions and also a grinding wheel 41 in an upper position of this table 19 free of rotation and lifting motions, it is constituted that two side dressers 47 and 49, performing a job for side dressing to the sides in front and in the rear of the grinding wheel 41 from the horizontal direction, are installed in the table and also a sensor 53, detecting a fact that each tip of these side pressers 47, 49 comes into contact with the side of the grinding wheel, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dresser device for side-dressing front and rear side surfaces of a grindstone in a surface grinder.

[0002]

2. Description of the Related Art Many users of surface grinders perform grooving on a workpiece. Side grinding is performed on the grindstone to perform the grooving, and the width of the peripheral edge of the grindstone is set to the above-mentioned value. It is thin corresponding to the groove. The conventional dresser device for performing the side dressing includes a side dresser provided on the table in the surface grinder, and the side dresser is for performing side dressing on the front and rear side surfaces of the grindstone from the horizontal direction. ..

Therefore, the grindstone is moved up and down while the grindstone is rotated. Further, by appropriately moving the table in the front-rear direction, the side dresser is brought closer to the grindstone to give a predetermined cut. As a result, desired side dressing can be performed on the grindstone.

[0004]

However, in the process of side-dressing the grindstone by the conventional dresser device as described above, the rigidity of the grindstone becomes smaller as the grindstone width of the peripheral portion of the grindstone becomes smaller, There is a problem that it is difficult to straighten the dress portion of the grindstone. In particular, in the case of molding a dress portion that is long from the peripheral edge of the grindstone toward the center, the rigidity of the grindstone becomes smaller, and the above problem becomes more remarkable.

[0005]

In order to solve the above-mentioned conventional problems, as a first means in the present invention, a table is provided so as to be movable in the front-rear direction and the left-right direction and above the table. In a surface grinder in which a grindstone is rotatably and vertically movable at a position, a side dresser for performing side dressing on the front and rear side surfaces of the grindstone is provided on the table, and the tip of the side dresser is a grindstone. Is provided with a sensor for detecting contact with the above-mentioned side surface.

As a second means, in a surface grinder in which a table is provided so as to be movable in the front-rear direction and the left-right direction, and a grindstone is rotatably and vertically movable above the table, both front and rear surfaces of the grindstone are provided. A pair of side dressers that perform side dressing simultaneously from the horizontal direction are provided facing the table, and at least one side dresser is provided so as to be movable in the front-rear direction in which the side dresser approaches and separates from the other side dresser. It is characterized by

[0007]

In the first means, the grindstone is moved up and down while the grindstone is rotated. Further, by moving the table in the front-rear direction and bringing the side dresser closer to the front and rear side surfaces of the grindstone, a predetermined cut is made. Thereby, side dressing is performed on the front and rear side surfaces of the grindstone.

When performing side dressing,
A sensor detects that the tip of the side dresser is in contact with the front and rear side surfaces of the grindstone.

In the second means, the grindstone is moved up and down while the grindstone is rotated. Further, by appropriately moving the table in the front-rear direction, the pair of side dressers is moved in the front-rear direction, and at least one of the side dressers is moved in a direction of approaching the other side dresser, with respect to the grindstone. Make a predetermined cut with a pair of side dressers. Accordingly, the pair of side dressers can simultaneously perform side dressing on the front side surface and the rear side surface of the grindstone so as to sandwich the grindstone.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to this embodiment will be described below with reference to the drawings.

Referring to FIG. 2, the surface grinder 1 comprises a main body frame 7 in which a lower frame 3 and an upper frame 5 are integrally provided. A table base 9 is provided on the lower frame 3 via a guide rail (not shown) so as to be movable in the front-rear direction (left-right direction in FIG. 2). In order to move the table base 9 in the front-rear direction,
The lower frame 3 is provided with a screw rod 13 which is interlockingly connected to the control motor 11 and extends in the front-rear direction, and a nut member 15 which is screwed into the screw rod 13 is integrally provided on the table base 9. The control motor 11 includes an encoder 17.

A table 19 is provided on the table base 9 via a guide rail 21 so as to be movable in the left-right direction (the front-back direction toward the paper surface in FIG. 2). In order to move the table 19 in the left-right direction. A screw rod 25 linked to the control motor 23 is provided at an appropriate position on the table base 9 so as to extend in the left-right direction, and a nut member 27 screwed to the screw rod 25 is integrally provided on the table 19. is there.

An elevating body 29 is provided on the upper frame 5 so as to be movable up and down via a guide rail (not shown).
In order to raise and lower the elevating body 29, a screw rod 33 interlockingly connected to a control motor 31 is provided in the upper frame 5 so as to extend vertically, and a nut member 35 screwed to the screw rod 33 is raised and lowered. It is provided on the body 29. The control motor 31 includes an encoder 37. The lifting body 29 is provided with a grindstone 41 which is rotatable by the drive of a drive motor 39, and the grindstone 41 is located above the table 19.

With the above-described structure, the table base 9 can be moved in the front-rear direction by controlling the drive of the control motor 11 and appropriately rotating the screw rod 13.
The table 19 can be moved in the front-back direction integrally with the table base 9. Further, by driving and controlling the control motor 23 to rotate the screw rod 25, the table 19
Can be moved in the left-right direction with respect to the table base 9. Further, by driving the drive motor 39, the grindstone 41 can be rotationally driven, and by drivingly controlling the control motor 31 to rotationally drive the screw rod 33, the grindstone 41 can be integrated with the elevating body 29. Can be raised and lowered.

Referring to FIG. 1, the table 19 is provided with a dresser device 43 for performing side dressing and tip dressing on the front and rear (left and right in FIG. 1) side surfaces of the grindstone 41.

Explaining the dresser device 43, a main body 45 of the dresser device 43 is detachably provided on the table 19, and a front side surface and a rear side surface of the main body 45 are provided with a side surface with respect to a rear side surface of the grindstone 41. A first side dresser 47 for performing dressing and a second side dresser 49 for performing side dressing are provided on the front side surface of the grindstone 41 so as to project in the horizontal direction. Further, a tip dresser 51 that performs tip dressing on the peripheral surface of the grindstone 41 is provided on the upper surface of the main body 45. In addition,
The tips of the first and second side dressers 47, 49 and the tip dresser 51 are made of diamond.

The first side dresser 47 is a grindstone 41.
Contacting the front side surface of the whetstone, the second side dresser 49 contacting the rear side surface of the grindstone 41, and the tip dresser 51.
A sensor 53 such as a vibration sensor or an AE sensor is provided on the main body 45 in order to detect that the tool contacts the peripheral surface of the grindstone 41.

With the above structure, the control motor 3 is driven while the drive motor 39 is driven and the grindstone 41 is rotated.
1 is controlled to drive the grindstone 41 up and down integrally with the lifting body 29. Further, by driving and controlling the control motor 11 to move the main body 45 of the dresser device 43 integrally with the table base 9 in the forward direction, the first side dresser 47 is moved toward the rear side surface of the grindstone 41. It can be moved, and a predetermined cut can be made in the rear surface of the grindstone 41. As a result, the first side dresser 47 can perform side dressing on the rear side surface of the grindstone 41.

While the grindstone 41 is being rotated, the grindstone 41 is moved up and down, and the second side dresser 49 is moved rearward so as to approach the front side surface of the grindstone 41 so as to move toward the front side surface of the grindstone 41. And make a predetermined cut. As a result, the side dressing can be performed on the front side surface of the grindstone 41 by the second side dresser 49.

Further, the control motors 11 and 23 are drive-controlled to appropriately move the tip dresser 51 in the front-rear direction and the left-right direction (the front-back direction toward the paper surface in FIG. 1) to be positioned vertically below the grindstone 41. Excuse me. Then, under the condition that the drive motor 39 is driven to rotate the grindstone 41, the control motor 11 is drive-controlled to rotate the screw rod 33, thereby bringing the grindstone 41 closer to the tip dresser 51. And make a predetermined cut.
As a result, the tip dresser 51 can perform tip dressing on the peripheral surface of the grindstone 41.

Referring to FIG. 7, the control means 55 for controlling the dressing of the grindstone 41 in this embodiment will be described. The control means 55 is a CPU.
57 and a memory 59. The CPU 57 is provided with an input unit 63, the encoder 17, the encoder 37, and the sensor 53 via the input interface 61.
And the control motors 11 and 31 are connected via the output interface 65.

The operation of this embodiment based on the above-mentioned structure will be described with reference to the flow chart shown in FIG.

As shown in FIG. 6, when the grooving process is performed on the workpiece W, the groove depth H, the groove width B, and the number of grooves Z.
Etc. (in addition, for example, the length of the groove is also included) is input to the input unit 63 (step 1).

After step 1 is completed, the CPU 57 calculates the width b of the dress portion of the grindstone 41 on the basis of the groove depth H, and based on the wear correction amount t, the number of corrections per groove, etc. The dress length 1 required to process one groove is calculated. Here, the wear correction amount means a correction amount when molding is performed as shown in FIG. 5 (b) when the periphery of the grindstone 41 is worn as shown in FIG. 5 (a). When the groove is processed, the number of wear corrections is not limited to one.

The first side dresser 47, the second
Side dressing is performed on the rear side surface and the front side surface of the grindstone 41 by the side dresser 49 so that the width of the dress portion of the grindstone 41 is b and the dress length is 1 (step 3).

Regarding the details of the side dressing,
For example, when side dressing is performed by the first side dresser 47, the control motor 31 is drive-controlled to raise and lower the grindstone 41 while the drive motor 39 is driven and the grindstone 41 is rotationally driven. Further, the control motor 23 is drive-controlled to move the first side dresser 47 to the grindstone 4.
The first incision is made by moving the front side closer to the rear side of No. 1. Thereby, the side dressing can be performed on the rear side surface of the grindstone 41 based on the first cut.

At this time, the lowermost height position of the grindstone 41, in other words, the uppermost height position of the first side dresser 47 relative to the grindstone 41 is determined by the dress length b, and the CPU 57 The drive of the control motor 31 is controlled by.

The sensor 53 determines whether the tip of the first side dresser 47 is in contact with the rear side surface of the grindstone 41.
Is detected as shown in FIGS. 3A and 3B, and the CPU 57 determines whether or not the output of the sensor 53 exceeds a predetermined threshold value. When the CPU 57 determines that the output of the sensor 53 does not exceed the threshold value, the CPU 57 drives and controls the control motor 31 to drive the grindstone 41 in the up-and-down movement direction, in other words, the first movement direction.
The up-and-down movement direction of the side dresser 47 is reversed. Therefore, the relative vertical movement of the first side dresser 47 with respect to the grindstone 41 is as shown in FIG. It should be noted that it is possible to determine whether or not the rate of change in the output of the sensor 53 exceeds the threshold value.

After the above-described operation is performed based on the first cut in the grindstone 41, the grindstone 41 is cut into two pieces.
The same operation is performed when making the cuts after the first time. Here, the cut amount and the number of cuts of the first side dresser 47 with respect to the grindstone 41 are determined by the CPU 5 based on the dress width b.
The control motor 11 is driven and controlled by 7.

The same applies when side dressing is performed on the front side surface of the grindstone 41 by the second side dresser 49.

After performing side dressing on the grindstone 41, one groove is machined on the workpiece W (step 4).

More specifically, after the work W is fixed to the table 19, the control motor 11 is drive-controlled to move the work W integrally with the table 19 in the front-rear direction,
The grindstone 41 is positioned vertically below. Then, under the condition that the drive motor 39 is driven to rotate the grindstone 41, the control motor 31 is drive-controlled to move the grindstone 41 up and down. Further, the control motor 23 is drive-controlled to reciprocate the workpiece W in the left-right direction integrally with the table 19. As a result, one groove can be machined in the workpiece W.

In the process of processing one groove,
When the peripheral edge of the grindstone 41 is worn, tip dressing is appropriately performed.

After processing one groove, the width of the dress portion of the grindstone 41 is actually measured (step 5). More specifically, the position of the table base 9 in the front-rear direction when the tip of the first side dresser 47 is brought into contact with the rear side surface of the dress portion,
The encoder 17 detects the position in the front-rear direction of the table base 9 when the tip of the second side dresser 49 is brought into contact with the front side surface of the dress portion, and the CPU detects the position based on the detected value.
The width of the dress portion is calculated by 57.

Then, it is judged whether or not the width of the dress portion after machining one groove is within the allowable range (step 6). If the width of the dress portion is not within the allowable range, the dress portion is changed. Remove and feed back to step 2.

If the width of the dress portion is within the allowable range, the outer diameter of the grindstone 41 is measured, and the wear amount of the dress portion of the grindstone 41 is calculated based on the measured value (step 7). More specifically, the encoder 37 detects the height position of the lifting body 29 when the tip of the tip dresser 51 is brought into contact with the tip of the dress portion of the grindstone 41, and the detected value and the initial outer diameter of the grindstone 41 are detected. Based on the above, the CPU 57 calculates the actual wear amount of the grindstone 41.

After the actual wear amount of the grindstone 41 is calculated, the dress length required for the CPU 57 to machine a plurality of grooves based on the actual wear amount and the number of grooves to be machined into the workpiece W. The L is calculated (step 8). Here, the plurality of pieces does not necessarily correspond to the number of grooves for grooving the workpiece W.

After calculating the dress length L required for machining a plurality of grooves, the dress length of the grindstone 41 is set by the first side dresser 47 and the second side dresser 49 as shown in FIG. 6 as described above. Side dressing is performed so as to be L (step 9), and the process is completed.

When a plurality of grooves are machined in the workpiece W,
As shown on the right side of FIG. 6, the dressing portion of the grindstone 41 is worn.

According to the above embodiment, the sensor 53
The contact state between the tip ends of the side dressers 47, 49 and the side surface of the grindstone 41 is observed by the, and when the output of the sensor 53 falls below the threshold value, the direction of movement of the side dressers 47, 49 relative to the grindstone 41. Therefore, the side dressing can be appropriately performed on the grindstone 41, and the dress portion can be molded straight.

Referring to FIG. 9, a dresser device 67 of the second embodiment is shown in FIG.

More specifically, a main body 69 of the dresser device 67 is removably provided on the table 19, and a pair of columns 71 and 73 of the main body 69 are opposed to each other in the front-rear direction (left and right in FIG. 9). One pillar 71 is fixed to the main body 69, and the other pillar 73 is movable in the front-rear direction with respect to the main body 69. In order to move the other column 73 in the front-back direction, the control motor 7 is placed at an appropriate position on the main body 69.
A screw rod 77 interlockingly connected to the screw rod 5 is provided extending in the front-rear direction, and a nut member 79 screwed to the screw rod 77 is integrally provided on the other column 73. The control motor 75 includes an encoder 81.
1 is connected to the CPU 57 via the input interface 61. The pillar 71 is provided with a first side dresser 83 for horizontally side-dressing the rear side surface of the grindstone 41. The pillar 73 has a second side dresser for side-dressing the front side surface of the grindstone 41.
A tip dresser 87 for performing tip dressing on the peripheral surfaces of the side dresser 85 and the grindstone 41 is provided.
Then, in order to detect that the first side dresser 83, the second side dresser 85, and the tip dresser 87 are in contact with the grindstone 41, sensors 89, 91 such as vibration sensors and AE sensors are provided on the supports 73, 75. The sensors 89 and 91 are connected to the CPU 57 via the input interface 61.

With the above structure, the control motor 3 is driven while the drive motor 39 is driven and the grindstone 41 is rotated.
1 is controlled to drive the grindstone 41 up and down integrally with the lifting body 29. Further, by driving and controlling the control motor 11 to move the main body 69 of the dresser device 67 integrally with the table base 9 in the forward direction, the first side dresser 83 approaches the rear surface of the magnet 41 in the forward direction. To the second side dresser 85 by driving and controlling the control motor 75 to move the strut 73 rearward.
Is moved in the rearward direction approaching the front side surface of the grindstone 41. As a result, the first side dresser 83 and the second side dresser 85 make predetermined cuts in the front and rear side surfaces of the grindstone 41, and the pair of side dressers 83, 8
5, the side dressing can be simultaneously performed on the front side surface and the rear side surface of the grindstone 41 so as to sandwich the grindstone 41.

Further, the control motor 75 is drive-controlled to move the column 73 in the front-rear direction so that the tip dresser 87 is positioned vertically below the grindstone 41. Then, under the condition that the drive motor 39 is driven and the grindstone 41 is rotationally driven, the control motor 31 is drive-controlled to lower the grindstone 41 toward the tip dresser 87 to make a predetermined cut. give. As a result, the tip dresser 87
Thus, tip dressing can be performed on the peripheral surface of the grindstone 41.

Even in the dresser device 67 of the second embodiment, the dress length L is determined and the side dressing is performed under the same operation as described above.

In the second embodiment as described above, since the pair of side dressers 83, 85 sandwiches the grindstone 41, side dressing can be performed simultaneously on the front side surface and the rear side surface of the grindstone 41. The effect of the first embodiment described above is further improved.

The present invention is not limited to the above description of the embodiments, but can be implemented in various other modes by making appropriate changes such as using a CCD camera instead of the encoder 37 or the like. Is.

[0048]

As will be understood from the above description of the embodiments, according to the first means of the present invention, it is observed by the sensor that the tip of the side dresser comes into contact with the front and rear side surfaces of the grindstone. Therefore, appropriate side dressing can be performed, and the dress portion can be molded straight.

Further, according to the second means, since the pair of side dressers can simultaneously perform side dressing on the front side surface and the rear side surface of the grindstone by sandwiching the grindstone, the same effect as above is obtained. Is played.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a dresser device according to a first embodiment.

FIG. 2 is a schematic side view of a surface grinder.

FIG. 3 is a diagram showing an output state of the sensor in the same cut, and FIGS. 3A and 3B show a state in which the path of the side dresser becomes small.

FIG. 4 is a diagram showing a pass state of a side dresser.

FIG. 5 is an operation explanatory view showing wear correction of a grindstone.

FIG. 6 is a view showing a grindstone after performing side dressing.

FIG. 7 is a control block diagram.

FIG. 8 is a diagram showing a flowchart.

FIG. 9 is a schematic side view showing a dresser device according to a second embodiment.

[Explanation of symbols]

 1 surface grinder 19 table 41 grindstone 43 dresser device 47 first side dresser 49 second side dresser 53 sensor

Claims (2)

[Claims] 1. A surface grinder in which a table is provided so as to be movable in the front-rear direction and the left-right direction, and a grindstone is provided above the table so as to be rotatable and vertically movable. A dresser device for a surface grinding machine, comprising: a side dresser for performing side dressing from a direction; and a sensor for detecting that the tip of the side dresser comes into contact with the side surface of the grindstone. 2. A surface grinder in which a table is provided so as to be movable in the front-rear direction and the left-right direction, and a grindstone is rotatably and vertically movable above the table. A pair of side dressers that perform side dressing simultaneously from the horizontal direction are provided facing the table, and at least one side dresser is provided so as to be movable in the front-rear direction in which the side dresser approaches and separates from the other side dresser. Dresser equipment for surface grinding machines.