JP2009166137A - Grinder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grinder which is equipped with a coolant nozzle or a grindstone front cover that dispenses with adjustment of a mounting position, and need not to be arranged at each grinding position even if index grinding is carried out. <P>SOLUTION: The grinder 1 is formed of: a bed 10; a traverse base 20; a grinding head 30 borne by the traverse base 20; a grinding wheel 31 mounted on the grinding head 30; a spindle head 40 arranged on the bed 10, for supporting a workpiece W by the grinding wheel 31; and a coolant nozzle 60 supported by the traverse base 20 while being positioned to the same, for feeding a coolant to a grinding point of the workpiece W by the grinding wheel 31. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a grindstone traverse type grinding machine.

  The grinding machine is provided with a coolant nozzle for supplying coolant to a grinding point of a workpiece in order to obtain good processing accuracy. In order to supply the coolant to the grinding point of the work piece, it is desirable that the coolant nozzle is always located at a certain distance from the grinding point from the viewpoint of processing accuracy. Further, from the viewpoint of safety, the grinding machine includes a grindstone front cover that covers the outer peripheral surface of the grinding wheel near the grinding point. The grindstone front cover is attached, for example, to prevent the operator from being damaged by scattering of grindstone fragments when the grindstone is broken. For this reason, it is desirable that the grindstone front cover is always located at a fixed distance from the grinding point, like the coolant nozzle.

  Regarding a coolant nozzle and a grindstone front cover, there exists a grinding machine described in FIG. 4 of Unexamined-Japanese-Patent No. 2002-103225 (patent document 1), for example. The grinding machine includes a grinding wheel cover main body attached to the grinding wheel so as to cover a side surface of the grinding wheel, and the grinding wheel front cover is covered with the grinding wheel so as to be movable in the X-axis direction with respect to the grinding wheel covering main body. It is attached to the main body and a coolant nozzle is attached to the front cover of the grinding wheel. In other words, by adjusting the position of the grinding wheel front cover with respect to the grinding wheel cover main body, the coolant nozzle can be arranged near the grinding point, and the grinding wheel front covering can be arranged so as to cover the outer peripheral surface of the grinding wheel near the grinding point. It can be done.

  Moreover, in FIGS. 1-3 of patent document 1, it has described that the shutter opened and closed in conjunction with the raising / lowering motion of a loader is provided above a workpiece, and a coolant nozzle is attached to this shutter. Thereby, a coolant nozzle can be located in a fixed distance from a grinding point, without performing position adjustment with respect to a grindstone cover main part.

Japanese Patent Application Laid-Open No. 7-328922 (Patent Document 2) describes a grinding machine in which a coolant nozzle is fixed to a bed. Thus, it is described that the distance from the grinding wheel can be made constant.
JP 2002-103225 A JP 7-328922 A

  However, in the grinding machine shown in FIG. 4 of Patent Document 1, it is necessary for the operator to manage the position of the grinding wheel front cover with respect to the grinding wheel covering main body according to the outer diameter of the grinding wheel. When the grindstone front cover can be automatically moved relative to the grindstone cover main body, the cost becomes high.

  Moreover, in the grinding machine described in FIGS. 1 to 3 of Patent Document 1, since the coolant nozzle is attached to the shutter, the coolant nozzle can supply coolant only in one position when the shutter is closed. For example, in the case where a workpiece has a plurality of grinding portions in the Z-axis direction, in the case of so-called index grinding, in a grinding machine configured to move the grinding wheel relative to the workpiece It is necessary to provide a coolant nozzle at each grinding site. That is, the number of coolant nozzles corresponding to the number of grinding parts is required.

  Moreover, in the grinding machine of patent document 2, it is a case where index grinding is performed in one workpiece similarly to FIGS. 1-3 of said patent document 1, Comprising: A grinding wheel is made with respect to a workpiece. In the grinding machine configured to move the coolant, it is necessary to provide a coolant nozzle at each grinding site. That is, also in this case, the number of coolant nozzles corresponding to the number is required for the grinding part.

  In addition, although the above was mainly described about the coolant nozzle, since it is desirable that the grinding wheel front cover is always located at a certain distance from the grinding point as well as the coolant nozzle, The same problem occurs when the coolant nozzle is applied to the grinding wheel front cover.

  The present invention has been made in view of such circumstances, and even when index grinding is performed without adjusting the mounting position, a coolant nozzle or a grindstone front cover that does not need to be provided in each grinding portion. It aims at providing a grinding machine provided with.

  The grinding machine of the present invention has a bed, a traverse base supported by the bed so as to be movable relative to the bed in the Z-axis direction, and a relative to the traverse base in the X-axis direction orthogonal to the Z-axis direction. A grinding wheel base supported by the traverse base so as to be movable, a grinding wheel placed on the grinding wheel base, a headstock that is placed on the bed and supports a workpiece to be ground by the grinding wheel, And a coolant nozzle that is supported by the traverse base in a state of being positioned with respect to the traverse base and supplies coolant to a grinding point of a workpiece to be ground by a grinding wheel.

  As a result, the position of the coolant nozzle in the X-axis direction is constant regardless of the position of the grindstone table in the X-axis direction. Therefore, even if the grinding wheel is worn, it is only necessary to adjust the wheel head by moving it in the X-axis direction, and it is not necessary to adjust the mounting position of the coolant nozzle.

  Further, since the coolant nozzle moves in the same direction as the grinding wheel moves in the Z-axis direction, only one coolant nozzle is sufficient even if the grinding site for the workpiece such as index grinding is different. Therefore, even when index grinding is performed, it is not necessary to provide a coolant nozzle for each grinding part. Workability is improved and costs can be reduced.

  Here, it is preferable that the coolant nozzle is movable outside the region in the Z-axis direction where the workpiece is disposed by moving the traverse base relative to the bed in the Z-axis direction. Thus, when the workpiece is attached to or detached from the headstock, the coolant nozzle can be moved in the Z-axis direction so as not to interfere with the workpiece to be attached or detached.

  Here, the grinding machine of the present invention is supported by the traverse base while being positioned with respect to the traverse base, and is separated from the outer peripheral surface of the grinding wheel when the workpiece is ground by the grinding wheel. It is preferable to provide a grinding wheel front cover that covers a part of the outer peripheral surface of the grinding wheel.

  Thereby, there exists an effect similar to the coolant nozzle of this invention also about a grindstone front cover. That is, even if the grinding wheel is worn, it is only necessary to adjust the grinding wheel base by moving it in the X-axis direction, and it is not necessary to adjust the position of the grinding wheel front cover. Furthermore, since the grinding wheel front cover moves in the same direction as the grinding wheel moves in the Z-axis direction, even if the grinding part for the workpiece such as index grinding is different, a single grinding wheel front covering is sufficient. Therefore, even when index grinding is performed, it is not necessary to provide a grindstone front cover for each grinding portion.

  Moreover, it is preferable that the grindstone front cover can be moved out of the region in the Z-axis direction where the workpiece is arranged by moving the traverse base relative to the bed in the Z-axis direction. Thereby, like the above-mentioned coolant nozzle, when the workpiece is attached to and detached from the headstock, the grindstone front cover can be moved to a position in the Z-axis direction that does not interfere with the workpiece.

  Here, the grinding machine of the present invention preferably includes a grindstone cover main body. The grindstone cover main body is supported by the grindstone stand while being positioned with respect to the grindstone stand, covers a part of the surface of the grinding wheel, and is formed separately from the grindstone front cover.

  By making the grindstone cover main body and the grindstone front cover separately, each of the grindstone cover main body and the grindstone front cover can exhibit an appropriate effect. That is, the grindstone cover main body is always located at a fixed distance from the grindstone even when the grindstone is moved, and covers a part of the surface of the grindstone. Therefore, the grinding wheel cover main body can always protect the grinding wheel. On the other hand, as described above, the grinding wheel front cover always covers the outer peripheral surface of the grinding wheel in the vicinity of the grinding point of the workpiece, thereby preventing the operator from being damaged due to grinding of the grinding wheel.

  Here, the coolant nozzle may be fixed to the grindstone front cover. Thereby, a coolant nozzle and a grindstone front cover can be handled substantially as one component. Therefore, when the coolant nozzle and the grindstone front cover are supported on the traverse base, an easy configuration can be adopted.

  By the way, the grinding machine of the present invention may have a grindstone front cover as described above instead of the coolant nozzle. That is, the grinding machine of the present invention includes a bed, a traverse base supported by the bed so as to be movable relative to the bed in the Z-axis direction, and an X-axis direction perpendicular to the Z-axis direction with respect to the traverse base. A grinding wheel platform supported by the traverse base so as to be relatively movable, a grinding wheel mounted on the grinding wheel table, a spindle table that supports a workpiece that is fixed to the bed and is ground by the grinding wheel. A part of the outer peripheral surface of the grinding wheel is covered while being separated from the outer peripheral surface of the grinding wheel when the workpiece is ground by the grinding wheel and supported by the traverse base while being positioned with respect to the traverse base. A grindstone front cover to be provided. Thereby, the said effect of this invention can be acquired about a grindstone front cover.

  According to the grinding machine of the present invention, it is not necessary to prepare each grinding part even if index grinding is performed without adjusting the mounting position of the coolant nozzle or the grindstone front cover.

  Next, the present invention will be described in more detail with reference to embodiments.

  The grinding machine 1 of this embodiment is demonstrated with reference to FIGS. 1-3. FIG. 1 is a diagram showing a grinding machine 1. FIG. 2 is a schematic view on the traverse base 20 when FIG. 1 is viewed from the left. FIG. 3 is a schematic view on the traverse base 20 when FIG. 1 is viewed from the front. In the following description, the side on which the operator is located with respect to the grinding machine 1 is referred to as the front, the side far from the operator is referred to as the rear, the worker's right is referred to as the right, and the operator's left is referred to as the left. . That is, the front-rear direction matches the X-axis direction, and the left-right direction matches the Z-axis direction.

  The grinding machine 1 includes a bed 10, a traverse base 20, a grinding wheel platform 30, a headstock 40, a grinding wheel front cover 50, and a coolant nozzle 60. The bed 10 includes a servo motor 11, a ball screw mechanism 12 disposed in a groove 13 extending in the Z-axis direction (left-right direction in FIG. 1), and a Z-axis guide 14 extending in the Z-axis direction on both sides of the groove 13. , 14.

  The traverse base 20 is installed on the Z-axis guides 14 and 14 and is connected to the ball screw mechanism 12. That is, the traverse base 20 slides in the Z-axis direction with respect to the bed 10 by the ball screw mechanism 12 driven by the servo motor 11.

  The traverse base 20 includes a servo motor 21 disposed on the rear side, a groove portion 22 provided on the upper surface side and extending in the X-axis direction (front-rear direction in FIG. 1), a ball screw mechanism 23 disposed in the groove portion 22, and an upper surface. And X-axis guides 24, 24 extending in the X-axis direction on both sides of the groove 24, and a gate-shaped gate pillar 25. The X-axis direction is a direction orthogonal to the Z-axis direction on the upper surface.

  The gate column portion 25 includes a first column member 25a, a second column member 25b, a third column member 25c, a first beam member 25d, and a second beam member 25e, and is installed on the traverse base 20. . The first column member 25 a extends upward from the left rear end portion on the traverse base 20. The second column member 25 b extends upward from the left front end portion on the traverse base 20. The third column member 25 c extends upward from the right front end portion on the traverse base 20. The column members 25a to 25c are higher than the grindstone base 30 and have substantially the same height. Further, the separation distance between the second column member 25 b and the third column member 25 c is larger than the left and right width of the grindstone base 30.

  The first beam member 25d extends in the X-axis direction from the upper end portion of the first column member 25a to the upper end portion of the second column member 25b. The second beam member 25e extends in the Z-axis direction from the upper end portion of the first column member 25a to the upper end portion of the second column member 25b. In this way, the gate pillar 25 is fixed on the traverse base 20.

  The grinding wheel base 30 is installed on the X-axis guides 24, 24 of the traverse base 20 and is connected to the ball screw mechanism 23. That is, the grindstone base 30 slides on the traverse base 20 in the X-axis direction by the ball screw mechanism 23 driven by the servo motor 21.

  The grinding wheel base 30 has a grinding wheel 31 and a grinding wheel cover main body 32. The grinding wheel 31 has a disk shape and is supported by the grinding wheel base 30. The grinding wheel 31 is rotated around the axis (Z-axis direction) by the grinding wheel base 30.

  The grindstone cover main body 32 includes a left side member 32a, an upper member 32b, a lower member 32c, and a rear member 32d. The grindstone cover main body 32 is formed so that each member 32 a to 32 d covers each surface of the grindstone 31. The right surface of the grinding wheel 31 is substantially covered with a grinding wheel base 30. That is, the grindstone cover main body 32 covers the periphery except the front of the grindstone 31 as shown in FIG. The left side member 32a is located on the right side of the second column member 25b, and the upper member 32b is located on the lower side of the second beam member 25e.

  The head stock 40 has a servo motor 42 and a main shaft 43. The servo motor 42 rotates the main shaft 43 around the axis. The main shaft 43 is supported by the main shaft 40 and supports the workpiece together with the tailstock 41. The workpiece also rotates as the main shaft 43 rotates. The main shaft 43 is located below the grindstone front cover 50 and the coolant nozzle 60 described later.

  The grindstone front cover 50 includes an attachment portion 51 and a cover portion 52. The grindstone front cover 50 is attached to the front surface of the second beam member 25 e of the gate pillar 25 by the attachment portion 51. The cover part 52 is integral with the attachment part 51, and includes an upper surface member 52a, a front surface member 52b, a left side member 52c, and a right side member 52d. It can be said that the cover part 52 is a substantially rectangular parallelepiped box shape excluding the rear surface and the lower surface. However, in the present embodiment, the upper surface member 52a is inclined so as to become lower as it goes forward.

  The cover 52 accommodates the upper front portion of the grindstone cover main body 32 when the grindstone base 30 moves forward from the second column member 25b. That is, the cover part 52 is larger than the grindstone cover main body 32. Moreover, the front part of the grindstone base 30 is lower than the height of the lower end of the grindstone front cover 50 as shown in FIG. That is, the grindstone base 30 can move forward and backward without being interfered with the grindstone front cover 50. When the grinding wheel base 30 moves forward to the grinding point, the grinding wheel and the grinding wheel front cover 50 are separated from each other by a predetermined distance, and scattering of chips and the like to the front is prevented.

  The coolant nozzle 60 is fixed on the upper surface member 52 a of the grindstone front cover 50. The tip of the coolant nozzle 60 is directed to a grinding point where the grinding wheel 31 grinds the grinding target portion W1 of the workpiece W, and is separated from the grinding point by a predetermined distance. The coolant nozzle 60 supplies coolant to the grinding point. In the present embodiment, the coolant nozzle 60 is trifurcated.

  Here, the effect of the grinding machine 1 will be described. The grinding wheel base 30 moves forward toward the portion to be ground W1, and the grinding wheel 31 reaches the grinding point. At this time, the front of the grinding wheel 31 is covered with the grinding wheel front cover 50, and the worker is appropriately protected. Further, during the grinding process, coolant is supplied to the grinding point from the coolant nozzle 60 on the grindstone front cover 50.

  Here, even when the diameter of the grinding wheel 31 is reduced due to wear, the separation distance between the grinding point and the coolant nozzle 60 and the separation distance between the grinding point and the grinding wheel front cover 50 are constant. Therefore, even in such a case, it is possible to perform processing while maintaining an appropriate separation distance only by moving the grinding wheel base 31 forward and bringing the grinding wheel 31 to the grinding point. That is, it is not necessary to adjust the positions of the grindstone front cover 50 and the coolant nozzle 60. In addition, since the displacement of the grinding point by grinding the to-be-ground part W1 of the workpiece W is very small (several μm), it does not affect the separation distance.

  Moreover, when there are a plurality of parts to be ground (W1, W2,...) In the workpiece W, when performing so-called index grinding, the traverse base 20 may be appropriately moved in the Z-axis direction. The grindstone front cover 50 of the present embodiment is attached to the gate post 25 fixed to the traverse base 20. The coolant nozzle 60 is fixed on the grindstone front cover 50. That is, the grindstone front cover 50 and the coolant nozzle 60 are supported by the traverse base 20 while being positioned with respect to the traverse base 20. Accordingly, as the traverse base 20 moves, the grindstone front cover 50 and the coolant nozzle 60 also move in the same direction. Thereby, even if it is index grinding, arrangement | positioning of one place is enough, and even after moving, the separation distance with a grinding point is kept constant.

  Further, as shown in FIG. 1, by moving the traverse base 20 to the left, the positions of the grindstone front cover 50 and the coolant nozzle 60 are set in the Z-axis direction region (workpiece) where the workpiece W is disposed. It can be moved to the outside of the area W occupies left and right. That is, the grindstone front cover 50 and the coolant nozzle 60 can be positioned to the left of the left end of the workpiece W (see the dotted line in FIG. 1).

  Thereby, when the workpiece W is attached to and detached from the head stock 40, the grindstone front cover 50 and the coolant nozzle 60 can be prevented from interfering with the workpiece, and workability is improved. For example, it is possible to smoothly attach and detach the workpiece W without being obstructed when the workpiece W is attached and detached by a loader (not shown) from above the grinding machine 1.

  In the present embodiment, the coolant nozzle 60 may be attached to the gate pillar portion 25. In addition, either the grindstone front cover 50 or the coolant nozzle 60 may be attached to the gate pillar 25.

It is a figure which shows the grinding machine. It is the schematic diagram on the traverse base 20 which looked at FIG. 1 from the left. It is the schematic diagram on the traverse base 20 which looked at FIG. 1 from the front.

Explanation of symbols

1: grinding machine, 10: bed,
20: Traverse base, 25: Gate post,
30: Grinding wheel base, 31: Grinding wheel, 32: Grinding wheel cover main body,
40: headstock, 43: spindle
50: Grinding wheel front cover, 51: Mounting part, 52: Cover part,
60: Coolant nozzle, W: Workpiece

Claims (7)

Bed and
A traverse base supported by the bed so as to be movable relative to the bed in the Z-axis direction;
A grinding wheel base supported by the traverse base so as to be relatively movable in the X-axis direction perpendicular to the Z-axis direction with respect to the traverse base;
A grinding wheel placed on the grinding wheel platform;
A headstock arranged on the bed and supporting a workpiece to be ground by the grinding wheel;
A coolant nozzle that is supported by the traverse base in a state of being positioned with respect to the traverse base and supplies coolant to a grinding point of the workpiece to be ground by the grinding wheel;
A grinding machine comprising:   The said coolant nozzle is movable to the said Z-axis direction area | region where the said workpiece is arrange | positioned by moving the said traverse base with respect to the said bed in the said Z-axis direction. Grinding machine.   The grinding wheel is supported by the traverse base in a state of being positioned with respect to the traverse base, and is separated from the outer circumferential surface of the grinding wheel when the workpiece is ground by the grinding wheel. The grinding machine according to claim 1, further comprising a grindstone front cover that covers a part thereof.   The said grindstone front cover is movable outside the area | region of the said Z-axis direction by which the said workpiece is arrange | positioned by moving the said traverse base with respect to the said bed in the said Z-axis direction. The grinding machine described.   A grinding wheel cover main body that is supported by the grinding wheel table in a state of being positioned with respect to the grinding wheel table, covers a part of the surface of the grinding wheel, and is formed separately from the wheel front cover. 4. The grinding machine according to 4.   The grinding machine according to any one of claims 3 to 5, wherein the coolant nozzle is fixed to the grindstone front cover. Bed and
A traverse base supported by the bed so as to be movable relative to the bed in the Z-axis direction;
A grinding wheel base supported by the traverse base so as to be relatively movable in the X-axis direction perpendicular to the Z-axis direction with respect to the traverse base;
A grinding wheel placed on the grinding wheel platform;
A headstock that is fixed to the bed and supports a workpiece to be ground by the grinding wheel;
The grinding wheel is supported by the traverse base in a state of being positioned with respect to the traverse base, and is separated from the outer circumferential surface of the grinding wheel when the workpiece is ground by the grinding wheel. A whetstone front covering covering a part,
A grinding machine comprising: