JPH0615962U - Whetstone dressing device installed in processing equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To select a dresser suitable for the current situation and to immediately use it without performing dresser replacement work. [Structure] A rotary dresser 38 and a diamond dresser 41 are arranged side by side in the grindstone feeding direction, and both dressers 38, 41 are arranged.
Of the dresser support 36 that moves the
And a dresser support plate 40, respectively. Whetstone stand 1
Diamond dresser 41 which is the dresser on the side close to 8
The tip position of the diamond tool 44 is moved backward from the dressing surface of the rotary dresser 38 in a direction away from the grindstone 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a grindstone dressing device provided in a processing device such as a grinder and for dressing the side surface of the grindstone.

[0002]

[Prior art]

 Conventionally, grinding machines and other processing devices that use grindstones perform dressing of the grindstones at appropriate times. For example, when dressing the side surface of the grindstone (that is, the surface that processes the outer peripheral surface and the inner peripheral surface of the workpiece), the grindstone is set to a predetermined position and driven to rotate, while a dresser corresponding to this grindstone is supported by the dresser. It is common practice to mount the dresser on a member, bring the dresser support member closer to the grindstone from the side, and bring the dresser into contact with the side surface of the grindstone.

[0003]

[Problems to be solved by the device]

 In the above processing apparatus, the type of dresser may have to be changed according to the type of grindstone used. For example, when a normal grinding stone made of fused alumina or the like is used together with a CBN (Cubic Boron Nitride) grinding stone having a lower processing accuracy but a higher processing speed in one processing apparatus, the ordinary grinding stone is dressed. In order to dress a CBN grindstone, a rotary dresser for a CBN grindstone must be used.

In the case of properly using a plurality of types of dressers as described above, conventionally, various dressers are detachably attached to a single dresser supporting member, and the dresser mounted on the dresser supporting member is appropriately set according to a grindstone. It is being exchanged. However, such dresser replacement work is troublesome and requires a relatively long time, resulting in a reduction in machining efficiency. In particular, when the replacement work is executed under NC control, the data input increases, leading to an increase in the cost of the entire device.

In view of the above circumstances, the present invention provides a grindstone dressing device that can be used immediately by selecting a dresser suitable for the current situation by a simple work without involving dresser replacement work. With the goal.

[0006]

[Means for Solving the Problems]

 The present invention provides a grinding tool supporting means for supporting a grindstone and rotating the grindstone, and a grindstone feeding means for moving the grindstone supporting means in a predetermined grindstone feeding direction between a machining position and a retracted position. In a grindstone dressing device provided in the apparatus for dressing the side surface of a grindstone supported by the grindstone supporting means, the first dresser and the second dresser are sequentially arranged from the side close to the grindstone supporting means in the retracted position. The dresser support member is provided with a dresser support member that integrally supports them in the state of being aligned in the grindstone feed direction, and a dresser feed means that moves the dresser support member in a cutting direction orthogonal to the grindstone feed direction. The first dresser is supported at a position retracted in the dresser feed direction from the portion where the second dresser is dressing (contractor). Section 1).

Here, the specific configuration of each dresser is not particularly limited, but one of the dressers is a rotary holder supported by a dresser support member so as to be rotatable about an axis parallel to the grindstone feed direction. By comprising a plurality of diamond tools arranged on the outer peripheral surface of the rotary holder in the circumferential direction of the rotation, a more excellent effect as described later can be obtained (claim 2).

[0008]

[Action]

 According to the above configuration, the dresser support member is moved in the dresser feed direction to a position where the first dresser reaches its dressing position, and in this state, the grindstone is sent toward the dress position in the grindstone feed direction, and By applying to the first dresser, the whetstone can be dressed using the first dresser. In addition, the dresser support member is moved in the dresser feed direction to a position where the second dresser reaches the dress position, and in this state, the grindstone is sent in the grindstone feed direction toward the dress position and applied to the second dresser. As a result, the whetstone can be dressed with this second dresser. At this time, since the first dresser on the front side as viewed from the grindstone supporting means is in a position retracted in the dresser feed direction with respect to the grindstone with respect to the dress portion of the second dresser, for example, the grindstone supporting means Even if the shaft is not particularly long, the interference between the grindstone supporting means and the first dresser can be avoided.

[0009]

【Example】

 FIG. 2 is a plan view showing an overall configuration of a system including an inner surface grinding machine and a whetstone dressing device for the inner surface grinding machine according to an embodiment of the present invention. The grinding machine includes a bed 10 extending in the Z-axis direction (grinding stone feeding direction; left and right direction in FIG. 2), and a turning table 12 is mounted on the bed 10. The revolving table 12 is configured to be slidably driven in the Z-axis direction on the bed 10 by the operation of the Z-axis motor 14 and revolving around the vertical axis by the operation of the revolving motor 16.

A plurality of (four in the illustrated example) grinding stone bases (grinding stone supporting means) 18 are installed on the turning table 12 along the circumferential direction thereof. Each grindstone base 18 is equipped with a grindstone shaft 20, and a grindstone 22 is attached to the tip thereof, so that the grindstone 22 and the grindstone shaft 20 are rotated around their own axes by a grindstone drive motor built in the grindstone base 18. ing. Here, among the plurality of grindstones, some of the grindstones (for example, three grindstones) 22 are ordinary grindstones having different diameters, and the other grindstones (for example, one grindstone) 22 are CBN grindstones. There is.

In such a grinder, the grindstone 18 to be used is selected by turning the turning table 12, and the selected grindstone 22 and grindstone 18 (the leftmost side in the drawing are moved by the sliding movement of the turning table 12). The grindstone base 18) is supplied from the retracted position shown in the drawing to the processing position in front of it (to the left in FIG. 2).

A bed 24 extending in the X-axis direction (cutting direction; vertical direction in FIG. 2) is installed at a position facing the grindstone 22 in this processing position. A work support 26 is arranged on the bed 24, and is slidably driven on the bed 24 in the X-axis direction by the operation of the X-axis motor 28. The work support table 26 includes a chuck 30, and the chuck 30 holds a cylindrical work 32 in a direction in which its axial direction matches the grinding wheel shaft 20 to be used, and drives the work 32 to rotate about the axis. Built-in work feed motor.

Next, the dressing device 34 provided in this inner surface grinding machine will be described with reference to FIGS. 1 (a) and 1 (b).

The dressing device 34 includes a dresser support base (constituting a dresser support member) 36 extending in the X-axis direction. The dresser support base 36 is connected to the work support base 26 via a connecting member (not shown), and is slidably moved in the X axis direction together with the work support base 26. The dresser support base 36 supports a rotary dresser (second dresser) 38 for grinding the side surface of the CBN grindstone at its front end (lower end in FIGS. 1 and 2), and the rotary dresser 38 is attached to the X-axis. It has a built-in dresser drive motor that rotates around its axis.

Further, on the side surface (the right side surface in FIGS. 1 and 2) of the dresser support base 36 that is closer to the turning table 12, a dresser support plate (dresser support member that extends in the same direction as the dresser support base 36 is configured. ) 40 is fixed, and a diamond dresser (first dresser) 41 is supported at the front end portion (lower end portion in FIGS. 1 and 2) of the dresser support plate 40. The diamond dresser 41 includes a rotary holder 42 as shown in FIG. 3, and a shaft 42a provided on the back surface of the rotary holder 42 is rotatable in a shaft hole 40a provided on the front surface of the dresser support plate 40. Has been inserted into. A positioning recess 42b is intermittently formed on the circumferential surface of the shaft 42a in the circumferential direction, and a pressure adjusting screw 50 is attached to the lower end of the dresser support plate 40 to adjust the pressure. The positioning ball 52 is pressed against the positioning recess 42b by the elastic force of the spring 54 arranged inside the screw 50, whereby the rotation holder 42 rotates about the shaft 42a. In addition, it is locked at an appropriate rotation position.

On the surface of the rotary holder 42, a plurality of diamond tools 44 facing outward in the radial direction of rotation are fixed side by side in the circumferential direction, and a diamond tool 46 facing the rotary axis of the rotary holder 42, and A diamond tool 48, which is oriented in the oblique direction between the radial direction of rotation and the rotational axis direction, is fixed. The arrangement position of each diamond tool 44 is set so that one of the diamond tools 44 always faces the front (downward in FIG. 3) in a state in which each positioning recess 42b is locked to the positioning ball 52. . Each of the diamond tools 44, 46, 48 is used for dressing an ordinary grindstone, and has a pointed dress portion at its tip.

Here, a distance Dz is provided in the Z-axis direction between the central axis of the rotary dresser 38 and the central axis of the diamond tool 44, and the tip of the diamond tool 44 used in the diamond dresser 41 ( 1 (a) (b) lower end position is a distance Dx in the X-axis direction from the dressing surface of the rotary dresser 38 (the surface where the rotary dresser 38 dresses; the lower surface in FIGS. 1 (a) and (b)) The support positions of both dressers 38 and 41 are set to be offset from each other so as to move backward.

Next, the dressing procedure of the grindstone 22 by the dressing device 34 will be described.

First, of the four grindstones 18 on the inner surface grinding machine, the grindstone 18 that supports the grindstone 22 to be dressed is selected, and the grindstone 22 of this grindstone 18 faces the work support 26 ( The turning table 12 is turned to an angle (toward the left in FIG. 2). On the other hand, the dressing device 34 is retracted to a position behind (above in FIG. 2) the processing position of the grindstone base 18.

Next, the revolving table 12 is slid to move the grindstone base 18 forward from the retracted position shown in the drawing toward the processing position.

Here, when the grindstone 22 to be dressed is the CBN grindstone, as shown in FIG. 1A, the rotary dresser 38 is rotationally driven to move the dresser support base 36 along the X-axis. 22 to the dress position A, and in this state, the grindstone 22 is rotated around its own axis while being fed to the dress position A, and the rotary dresser 38 is brought into contact with the side surface of the grindstone 22. The side surface of the grindstone 22 can be dressed.

On the other hand, when the whetstone 22 to be dressed is an ordinary whetstone, as shown in FIG. 1B, the diamond dresser 41 in front of the dressing position A is used as the dresser support 36. The dresser supporting plate 40 is moved together with the integrated dresser support plate 40 to the dressing position B along the X-axis direction, and in this state, the grindstone is fed to the dressing position B while rotating the grindstone about its own axis. The side surface of the grindstone 22 can be dressed by bringing the tip of the diamond tool 44 into contact with the side surface of the whetstone 22.

As described above, in the dressing device 34, the rotary dresser 38 and the diamond tool 41 are arranged on the dresser support base 36 and the dresser support plate 40 that form the dresser support member in the Z-axis direction, which is the grindstone feed direction, at the same time. Since it is designed to be supported, an appropriate dresser can be selected only by changing the feed amount (feed position) of the grindstone 22 by the Z-axis motor 14. Therefore, the conventional dresser replacement work is unnecessary, the work efficiency is significantly improved, and the input data amount can be reduced when each operation is performed by NC control.

Further, regarding the support position of the dresser support member, the tip end of the diamond tool 44 is set back in the X-axis direction, which is the cutting direction, from the dressing surface of the rotary dresser 38. As shown in the drawing, even when the rotary dresser 38 on the back side from the grinding wheel base 18 is used, the diamond dresser 41 on the front side does not interfere, and the grinding wheel shaft 20 and the grinding wheel shaft 20 are not particularly lengthened. Interference with the diamond tool 44 can be avoided. Therefore, the dressing by the rotary dresser 38 can be made possible while ensuring the support rigidity of the grindstone 22 to the same level as the conventional one. Moreover, since the dresser support base 36 and the dresser support plate 40 move in the X-axis direction, it is not necessary to move the grindstone 22 in the X-axis direction even if the dressing positions of both dressers 38 are displaced from each other in this direction. Instead, both dressers 38 and 41 can be used without inconvenience only by changing the feed amount of the dresser (movement amount in the X-axis direction).

Further, in this embodiment, the rotary holder 42 of the diamond dresser 41 is mounted on the dresser support plate 40 so as to be rotatable about the Z-axis, and a plurality of diamond tools 44 are arranged in the circumferential direction of rotation. Even if the diamond tool 44 is worn due to its use, the diamond tool 44 can be easily replaced by rotating the rotary holder 42. Further, since the diamond tool 46 oriented in the rotation axis direction and the diamond tool 48 oriented in the oblique direction are fixed together with the diamond tool 44, not only the outer peripheral surface of the grindstone 22 but also its end surface (see FIG. The same diamond dresser 41 can be used to dress the taper surface at the corners and the left surface in 1 (a) and (b).

The present invention is not limited to such an embodiment, and the following modes can be taken as an example.

(1) As the first dresser and the second dresser, for example, a single-stone dresser (diamond dresser) may be used as the second dresser, and a rotary dresser may be used as the first dresser. A rotary dresser may be used as the dresser.

(2) In the above embodiment, the grinding machine is shown in which the grindstone 22 is selected by turning the turning table 12. However, in the present invention, regardless of the means for selecting the grindstone in the processing device, For example, the present invention can be applied to a case where a plurality of types of grindstones are replaceably mounted on a single grindstone base.

(3) The processing device provided with the grindstone dressing device of the present invention may be any device that performs processing using the side surface of the grindstone, and grinds, for example, the outer peripheral surface of the work in addition to the inner surface grinding machine described above. It can also be applied to a cylindrical grinder.

[0030]

[Effect of device]

 As described above, according to the present invention, the first dresser and the second dresser are arranged side by side in the grindstone feed direction on the same dresser support member that moves in the cutting direction, and the feed amount (feed position) of the whetstone to be dressed is set. Since it is possible to select an appropriate dresser by simply changing it, it is possible to immediately use the dresser according to the purpose of both dressers without the work of replacing the dresser as in the conventional case. Therefore, it is possible to significantly improve the work efficiency and reduce the input data when the NC control is performed. Moreover, in the dresser supporting member, the first dresser on the side closer to the grindstone supporting means at the retracted position is supported at a position retracted in the dresser feed direction than the dress portion of the second dresser, so It is possible to avoid the first dresser from interfering with the above-mentioned grindstone supporting means during dressing by the second dresser without lengthening the grindstone supporting means such as the grindstone shaft. Good dressing can be achieved with both dressers while ensuring support rigidity.

Further, in the apparatus according to claim 2, one dresser is provided with a rotary holder that rotates about an axis parallel to the grindstone feeding direction, and a plurality of rotary holders are arranged on the outer peripheral surface of the rotary holder in the circumferential direction. Since the diamond tool is arranged, if the diamond tool is worn, the diamond tool can be easily replaced by simply rotating the rotary holder.

[Brief description of drawings]

FIG. 1 (a) is a partial cross-sectional plan view showing a state in which a rotary dresser of a dressing device for a grindstone according to an embodiment of the present invention is used, and FIG. 1 (b) uses a diamond dresser for the dressing device. It is a partial cross-section top view which shows a state.

FIG. 2 is a partial cross-sectional plan view showing the overall configuration of a system including the grindstone dressing device and an inner surface grinder.

FIG. 3 is a cross-sectional plan view showing a mounting structure of a rotary holder in the whetstone dressing device.

[Explanation of symbols]

 14 Z-axis motor (grinding stone feeding means) 18 Grinding stone stand (grinding stone supporting means) 22 Grinding stone 28 X-axis motor (dresser feeding means) 34 Dressing device 36 Dresser supporting shaft (constituting dresser supporting member) 38 Rotary dresser (second dresser) ) 40 dresser support plate (constituting dresser support member) 41 diamond dresser (first dresser) 42 rotary holder 44 diamond tool

Claims (2)

[Scope of utility model registration request] 1. A process comprising: a whetstone supporting means for supporting a whetstone and rotating the whetstone; and a whetstone feeding means for moving the whetstone supporting means in a predetermined whetstone feeding direction between a working position and a retracted position. In a whetstone dressing device for dressing a side surface of a whetstone supported by the whetstone supporting means, the first dresser and the second dresser are arranged in order from the side near the whetstone supporting means in the retracted position. In the dresser support member, the dresser support member integrally supporting them in the state of being aligned in the grindstone feed direction and the dresser feed means for moving the dresser support member in the cutting direction orthogonal to the grindstone feed direction are provided. An additional feature is that the first dresser is supported at a position retracted in the dresser feed direction from the portion where the second dresser is dressing. A whetstone dressing device installed in the work equipment. 2. A grindstone dressing device provided in the processing apparatus according to claim 1, wherein one of the first dresser and the second dresser is rotatably provided around an axis parallel to the grindstone feed direction. A grindstone dressing device provided in a processing device, comprising: a rotary holder supported by a support member; and a plurality of diamond tools arranged on an outer peripheral surface of the rotary holder side by side in the rotational circumferential direction.