JP4029530B2 - Processing area cover device for grinding machines - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cover device that locally covers a machining area in a machine tool.
[0002]
[Prior art]
In a conventional technique, for example, in a grinding machine such as a multi-grinding machine, a plurality of grinding wheels are provided, and mounting and dismounting are troublesome. Therefore, in order to extend the life of the grinding wheel, Has a large diameter.
[0003]
Therefore, in a normal grinding machine, the grinding wheel is attached / removed from the side, but the entire grinding wheel is large and arranged in a plurality of rows in the axial direction as in the multi-grinding machine as described above. In this case, it is difficult to attach / remove the grinding wheel from the side. In such a case, the grinding wheel is attached / removed from above.
In that case, a cover device having a structure as shown in FIGS. 8 and 9 is used.
[0004]
In the cover device that covers the processing area locally, a grinding wheel cover 53 that covers the grinding wheel 52 from above is provided outside the workpiece cover 51 provided on the bed 50 so as to cover the workpiece W side from the front side and the upper side. The grinding wheel cover 53 is provided with a grinding fluid nozzle 54 and supported by a horizontal support shaft 56 provided horizontally at the rear part of the grinding wheel base 55, and freely rotatable upward about the horizontal support shaft 56. Thus, the top of the grinding wheel 52 is opened.
The grinding wheel 51 is mounted / removed in a state where the grinding wheel cover 53 is rotated upward and the grinding wheel 51 is largely opened.
[0005]
[Problems to be solved by the invention]
In the above-described conventional cover device, scattering of the grinding fluid to the operator side of the front surface of the grinding machine is prevented by the workpiece cover 51, but the grinding wheel cover 53 is attached to the grinding wheel base 55. In addition to moving forward and backward together with the grinding wheel base 55 and covering the large-diameter grinding wheel 52 from above, a gap C is generated between the workpiece W and the grinding wheel 52, that is, between the workpiece cover 51. . Therefore, the scattered grinding fluid becomes mist from the gap and jumps to the outside, deteriorating the working environment.
[0006]
In order to solve such problems and to maintain a good working environment, means for extending the workpiece cover 51 to above the grinding wheel cover 53 can be considered, but the grinding wheel cover 53 rotates upward. Therefore, the grinding wheel cover cannot be opened unless the grinding wheel base 55 is moved backward to the position where the grinding wheel cover 53 is removed from the workpiece cover 51. Therefore, the stroke of the grindstone table 55 becomes very long. That is, the entire grinding machine has a very large structure.
[0007]
In addition, a means for covering the entire grinding machine with the entire cover including a cover device for locally covering the machining area is conceivable. However, the cover device for covering the machining area locally, particularly the grinding wheel cover 53 is rotated upward. In the open form, at least a space occupied by the grinding wheel cover 53 that rotates upward is required, and the entire cover is enlarged accordingly. For these reasons, the work cover and the entire cover that cover the grinding wheel cover 53 are not actually provided.
[0008]
The present invention provides a cover device that reduces the stroke of the grinding wheel head as much as possible with respect to the mounting / removal of the above-mentioned large grinding wheel, avoids the enlargement of the cover itself and the entire grinding machine, and blocks the scattering of the grinding fluid. The purpose is to provide.
[0009]
[Means for Solving the Problems]
In the grinding machine according to the present invention, a processing area cover device rotatably supports a grinding wheel, covers a grinding wheel base supported by a bed so as to be movable back and forth with respect to the workpiece, and covers an upper portion of the grinding wheel. A grinding machine provided with a grinding wheel cover supported on the grinding wheel base so that the side pivots upward and rearward and the grinding wheel upper part can be freely opened and closed, for example, a plurality of grinding wheels are supported in the axial direction on the grinding wheel base. In the multi-grinding machine, it is fixedly installed on the bed on the workpiece side, and covers the workpiece, and also covers the grinding wheel platform and the workpiece side front portion of the grinding wheel cover. Is provided with an openable and closable lid that is pivotably provided on the upper side of the grinding wheel base so as to allow the turning opening operation of the grinding wheel cover.
[0010]
The cover has a wall surface through which the headstock for supporting the workpiece is displaceably penetrated in the axial direction of the workpiece, and always surrounds at least the tip of the headstock for supporting the workpiece inward.
An opening that can be opened and closed by a door is formed on the side and / or the front of the cover, and is attached so that the grinding wheel portion protrudes to the front and can be in an upright state on the grinding wheel base. The back plate is a plate that fits in the inner peripheral surface of the cover with a gap, closes the back surface of the space of the cover, and moves forward and backward with respect to the cover as the grindstone base advances and retreats.
[0011]
The back plate is a gate-shaped flat plate, the inner edge upper side of which is in contact with the upper surface of the grinding wheel cover, the inner edge both sides are in contact with the both sides of the grinding wheel cover, and upright when the grinding wheel cover is in use. It is fixed to the grinding wheel cover so as to be in a state.
The cover is formed of, for example, a frame structure and a sheet metal material attached thereto.
[0012]
Grinding in the above grinding machine is performed by a grinding wheel that is supported by the grindstone table and rotated by the grindstone table by cutting and advancing the grindstone table with respect to the workpiece held on the main shaft of the headstock and being driven to rotate. However, at that time, the grinding fluid is sprayed from the grinding fluid nozzle that has moved forward integrally with the grinding wheel to the portion to be ground by the grinding wheel.
[0013]
In the above grinding operation, the table, the grinding wheel cover, and the grinding wheel on which the workpiece is mounted are entirely covered with a cover device including a cover and a back plate portion. Therefore, the grinding fluid scattered from the grinding location is blocked by the cover device, flows down the inner surface thereof, flows out from the lower end edge onto the bed, and does not splash outside.
[0014]
In the shielding of the above-mentioned cover device, the grinding wheel cover provided with the grinding fluid nozzle and the back plate portion attached to the grinding wheel base side with the grinding wheel portion protruding to the front face are moved forward and backward with a minute gap in the cover. Even if the grinding wheel base is in the most retracted position, the cover device is not incompletely shielded because it is still in the relationship within the cover.
[0015]
Even if the workpiece W is positioned at a predetermined position with respect to the grinding wheel at the start of grinding processing, or the table is moved in the axial direction for traverse feeding in grinding, the headstock will remain Since the shaft passes through the wall so as to be displaceable in the axial direction and at least the tip of the headstock for holding the workpiece is always located in the cover, the cover device is not completely shielded.
[0016]
In the case of mounting / removing the grinding wheel, retract the grinding wheel base in its original position, open the cover on the top of the cover, open the top of the grinding wheel entirely, and retract the grinding wheel cover together with the back plate part, Install and remove the grinding wheel.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
A case where the cover device according to the embodiment of the present invention is applied to, for example, a multi-grinding machine as a machine tool will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the multi-grinding machine includes a table 2 that can be integrally formed with the bed 1 or moved left and right on the bed 1 and a grindstone base 3 that can be moved forward and backward with respect to the table 2. It is provided before and after. The table 2 is provided with a headstock 4 and a tailstock 5 facing each other, and is also provided with a sizing device 6a and a steadying device 6b. The grinding wheel table 3 includes a plurality of grinding wheels 7, 7,. A grinding wheel cover 9 provided with grinding liquid nozzles 8, 8... Corresponding to each grinding wheel is provided at the front end edge portion.
[0018]
The grinding wheel cover 9 is mounted on the horizontal support shaft 10 at the rear end of the upper surface of the grinding wheel base 3 so that the base edge is pivotable, and the grinding wheel 7, 7. The grinding liquid nozzles 8, 8... That can cover the whole from above and that are attached to the edge of the tip face the grinding wheels 7, 7.
[0019]
In the grinding machine, the cover device is attached to the grinding wheel cover 9 on the grinding wheel base 3 side and the main part A fixed on the bed 1 on the table 2 side where the workpiece W is supported, and on the table 2 side. It consists of a back plate part B that moves forward and backward with respect to the main part A.
[0020]
As shown in FIG. 3, the main part A of the cover device includes a top surface portion 11 that covers the grinding wheel base side, a front slope portion 12, a front face portion 13, and a top face portion 11, a slope portion 12, and both side edges of the front face portion 13. A box-like table side formed from a first cover part A1 on the side of a box-shaped grinding wheel base formed from the connected side face parts 14 and 15, and a top face part 16 covering the table side, a front face part 17 and both side face parts 18 and 19 The second cover portion A2 is combined.
[0021]
The width of the first cover portion A1 is appropriately wider than the second cover portion A2, and the front surface portion 13 of the first cover portion A1 and the front surface portion 17 of the second cover portion A2 are the same height, and one of the first cover portions A1 The side surface portion 14 and the one side surface portion 18 of the second cover portion A2 are flush with each other, and the main portion A of the cover device forms an integrated space in which the back surface and the bottom surface are not covered.
[0022]
Therefore, the front surface portion 13 of the first cover portion A1 is not full-width, but lacks the portion corresponding to the front surface portion 17 of the second cover portion A2, and the step of the other side surface portion 19 of the second cover portion A2 with respect to the front surface portion 17. It has a surface with Then, the side surface portion 19 of the second cover portion A2 having a stepped shape is a downwardly opened gate shape in which an opening portion 19b having a peripheral edge portion 19a is formed on the upper edge and the front edge.
[0023]
As shown in FIGS. 1 and 2, the main part A of the cover device includes a table 2 including a work piece W, a headstock 4, a tailstock 5, a sizing device 6a, and a steadying device 6b. It is installed on the bed 1 on the table side so as to cover and the back of the grindstone table 3 side is open.
[0024]
The headstock 4 is located on the front side of the front surface portion 13 of the first cover portion A1, and at least the tip portion that holds the workpiece is always inside from the opening portion 19b of the side surface portion 19 of the second cover portion A2. The opening 19b is configured so that the headstock 4 can move with a minute gap.
[0025]
The back plate portion B is a gate-shaped flat plate as shown in FIGS. 2 and 4, the inner edge upper side abuts on the upper surface 9 a of the grinding wheel cover 9, and the inner edge both sides abut on both side surfaces of the grinding wheel cover 9, respectively. In addition, when the grinding wheel cover 9 is in a lying state, the grinding wheel cover 9 is fixed to the grinding wheel cover 9 so as to be in an upright state.
[0026]
In addition, the grinding wheel cover 9 covers the grinding wheels 7, 7... During grinding, that is, the vertical dimension of the back plate portion B in the upright state, the upper side of the outer edge is the top surface portion 11 of the main part A of the cover device. The height is such that the inner surface can be substantially in contact with the inner surface, and the lower side of the outer edge is substantially in contact with the bed surface on which the grindstone table 3 slides. Similarly, the lateral width is such that both sides of the outer edge can substantially contact the inner surfaces of the side surface portions 14 and 15 of the first cover portion A1 of the main portion A. Moreover, the depth of the main part A and the mounting position of the back plate part B are such that the back plate part B enters the appropriate amount M from the rear end of the main part A even when the grinding wheel base 3 is in the retracted position. It is in.
[0027]
That is, the back plate portion B is fitted with a small gap in the rectangular opening on the back surface of the main portion A formed by the main portion A and the bed surface, regardless of the advancement and retreat of the grindstone table 3 so as to close it. Thus, during grinding in which the grinding fluid is scattered, only the work area space such as the workpiece W and the grinding wheels 7, 7... Is completely shielded by the main part A and the back plate part B of the cover device.
[0028]
As shown in FIGS. 2, 4 and 5, the main part A of the cover device excludes the boundary line between the slope part 12 of the first cover part A1 and the front face part 13 and the top face part 16 of the second cover part A2. It consists of a frame structure at the corner (see FIG. 7) and a sheet metal material attached to it. For attachment / detachment of the workpiece W, attachment / detachment of the grinding wheels 7, 7,. Each surface is opened.
[0029]
In the first cover portion A1, the top surface portion 11 is a rotatable cover plate material 22 whose edge on the slope portion 12 side is coupled to a frame member 21 at the boundary with the slope portion 12 by hinges 20 and 20. A flange 22a is formed horizontally at the time of shielding by the stopper 23 of the frame member 21 and faces downward at the time of shielding.
[0030]
Both side surface portions 14 and 15 are rotatable door plate members 24 and 25 that are divided into two parts in a vertical division with a connection point between the top surface portion 11 and the inclined surface portion 12 and joined by hinges 20 and 20 at a dividing line. . An inward flange 24 a is formed at the rotation leading edge of each door plate member 24 on the back side. Accordingly, the flange 22a of the cover plate material 22 and the flanges 24a and 24a of the door plate materials 24 and 24 at the time of shielding have a main portion A like a frame of the back opening.
[0031]
In the second cover portion A2, the side surface portion 18 adjacent to the one side surface portion 14 of the first cover portion A1 is hinged by an adjacent line with the door plate member 25 on the front side of the side surface portion 14 of the first cover portion A1. It is the door board material 26 couple | bonded so that outward bending protrusion is possible.
That is, the door plate material 25 and the door plate material 26 are in the same plane when shielded, and when opened, the folds are folded in two so as to protrude outward, and one side surface portion 14 of the first cover portion A1 and the second cover portion A2 One side surface portion 18 is opened as one opening.
[0032]
Further, as shown in FIG. 3, the second cover part A2 is divided into right and left areas in the width direction, and the front surface part 17 and the upper surface part 16 include both the right and left sides including the slope part 12 of the first cover part A1. Each of the areas is cut out with an edge 27 on the entire periphery, and a left opening 28 and a right opening 29 are formed.
[0033]
As shown in FIGS. 4 and 5, the left opening 28 and the right opening 29 have shapes corresponding to the front and top surfaces of the second cover part A2 and the inclined surface part 12 of the first cover part A1, respectively. The first opening / closing door 30 and the second opening / closing door 31 that are in a state and cover the left opening 28 and the right opening 29 are arranged separately on the front and back of the front surface portion 17, that is, the edge portion 30 a that overlaps the frame member 21 is provided. The formed first opening / closing door 30 is arranged on the front side, and the second opening / closing door 31 is arranged on the back side. The first opening / closing door 30 and the second opening / closing door 31 are formed with a plurality of windows fitted with transparent plates so that the inside can be seen.
[0034]
The rollers 32, 32 attached to the respective lower end edges are placed on the rails 33, 33 attached to the front and back over the entire width of the lower edge 27, and the first opening / closing door 30 and the second opening / closing door. The door 31 can move left and right.
That is, the first opening / closing door 30 moves to the right to open the left opening 28, and the second opening / closing door 31 moves to the left to open the right opening 29. Therefore, the left opening 28 and the right opening 29 Are not opened simultaneously.
[0035]
The first opening / closing door 30 and the second opening / closing door 31 may be opened / closed by a fluid pressure mechanism or an electric mechanism (not shown), or may be manually opened / closed by attaching a handle 34. Further, the second opening / closing door 31 may not be a sliding door type but may be a freely attachable / detachable cover plate that maintains the flatness at the front surface portion 17 so as not to obstruct the opening / closing of the first opening / closing door 30.
[0036]
Grinding in the multi-grinding machine described above is performed by cutting and advancing the grindstone table 3 with respect to the workpiece W held and rotated by the spindle of the spindle stock 4 and the center of the tailstock 5. It is carried out by the grinding wheels 7, 7,... That are supported and driven by rotation. At this time, the grinding fluid nozzles 8, 8,. , The grinding fluid is sprayed to the grinding location by each grinding wheel 7.
[0037]
In the above grinding operation, the grinding wheel cover 9, the grinding wheel 7, the spindle head 4, the tailstock 5, the workpiece W, the sizing device 6 a, the steadying device 6 b, the grinding fluid nozzles 8, 8. 7 ... are entirely covered with a cover device composed of a main part A and a back plate part B composed of a first cover part A1 and a second cover part A2. Therefore, the grinding fluid scattered from the grinding portion is blocked by the cover device, flows down the inner surface thereof, flows out from the lower end edge onto the bed 1, and does not splash outside.
[0038]
In the shielding of the cover device, the grinding wheel cover 9 provided with the grinding fluid nozzles 8, 8... And the back plate portion B that covers the back side of the grinding wheels 7, 7,. Even if the peripheral edge of the cover A1 moves forward and backward with a minute gap, and the grindstone base 3 is in the most retracted position, that is, the retracted end position of the stroke used for processing or the last retracted position with respect to the bed, the main part A Since the first cover portion A1 is positioned, the cover device is not completely shielded at least during processing.
[0039]
Further, when starting the grinding process, the work piece W may be positioned at a predetermined position with respect to the grinding wheels 7, 7,..., Or the table 2 may be moved in the axial direction in order to feed the traverse in grinding. The headstock 4 moves with a small gap with respect to the opening portion 19b, and at least the main shaft at the tip end is located at the leftmost position, that is, always in the second cover portion A2. Shielding will not be incomplete.
[0040]
In the case of mounting / removing the grinding wheel, the grinding wheel base 3 is moved back to the original position, and the cover plate material 22 of the top surface portion 11 of the first cover part A1 is turned forward with the hinges 20 and 20 as axes, The top surface portion 11 of the first cover portion A1, that is, the grinding wheel 7, 7,... Is entirely opened, the grinding wheel is provided with the grinding liquid nozzles 8, 8,. The cover 9 is pivoted upward about the horizontal support shaft 10 as a whole to reach the retracted position. Thus, the mounted grinding wheels 7, 7... Are completely exposed and removed from above the opening of the top surface portion 11 of the first cover portion A 1. ... is installed.
[0041]
At the time of maintenance and inspection by the operator, as shown in FIG. 5, when both the side surface portions 14 and 15 of the first cover portion A <b> 1 or one of the door plate members 24 is rotated forward with the hinges 20 and 20 as axes, the top surface portion 11. Both or one side of the lower side surfaces 14 and 15 is open.
Further, when the door plate member 25 and the door plate member 26 are folded so as to be folded in two, with the folds protruding outward, one side surface portion 14 of the cover portion A1 below the slope portion 12 and one of the second cover portion A2 The side part 18 opens as one opening.
[0042]
In the case of adjusting the headstock and the tailstock and carrying in / out the workpiece, as shown in FIG. 6, the first opening / closing door 30 is moved to the right while the second opening / closing door 31 is set to the right and the right opening 29 is closed. The left opening 28 opens when it is moved by power or manually. Conversely, when the second opening / closing door 31 is moved to the left with the first opening / closing door 30 leftward and the left opening 28 closed, the right opening 29 is opened.
[0043]
In the above-described embodiment, the lid plate material 22 is configured to be opened and closed by being rotated by the hinge 20, but is not limited to this configuration. For example, the lid plate material 22 may be slid in the horizontal direction. May be. That is, the lid plate material 22 is provided so as to be freely opened and closed so as to allow the turning opening operation of the grinding wheel cover 9. Further, the back plate portion B may be made of a flexible material such as a rubber material.
[0044]
【The invention's effect】
According to the machining area cover device in the grinding machine of this invention (inventions 1 and 2), since the grinding wheel base and the workpiece side front portion of the grinding wheel cover are covered, the grinding fluid or the like from the machining area is exposed to the outside. It is possible to block the scattering, and it is possible to purify the working environment and completely collect the grinding fluid. And since the upper part of the grinding wheel base side of the cover device is equipped with a lid that can be opened and closed to allow the turning operation of the grinding wheel cover, it has a function that can easily attach and detach the grinding wheel even with a small stroke of the grinding wheel base. Have.
[0045]
Therefore, the grinding machine itself as well as the cover itself can be downsized. In particular, in a multi-grinding machine (claim 8) in which a plurality of grinding wheels are supported, the effect on the ease of attaching and detaching the grinding wheels is great.
[0046]
In the processing area cover device of the grinding machine according to the present invention (invention 3), an opening that can be opened and closed by a door is formed on the side and / or front of the cover, and can be wide. Therefore, it has a function capable of facilitating attachment / detachment of a workpiece and maintenance / management of the machine tool.
[0047]
In the processing area cover device in the grinding machine of this invention (inventions 4 and 5), the grinding wheel portion is attached so that the grinding wheel portion protrudes to the front surface and can be in an upright state on the grinding wheel base side. It is fitted with a gap, closes the back of the space of the cover, and has a back plate that is a plate that moves forward and backward with respect to the cover as the grinding wheel head advances and retreats. Can be well shielded.
[0048]
In the work area cover device in the grinding machine of this invention (Claim 6), the cover has a wall surface through which the headstock for supporting the work piece is displaceable in the axial direction of the work piece, and at least supports the work piece. Since the tip of the headstock is always surrounded on the inside, shielding of the machining area is not impaired even when the headstock is displaced in the axial direction, the cover can be reduced in size, and maintenance and inspection of the headstock are easy. .
[0049]
In the processing area cover device in the grinding machine of this invention (invention 7), since the cover is formed by the frame structure and the sheet metal material attached thereto, the structure is also simple and unitization is possible. In addition, assembly to the grinding machine is easy. Manufacture is also easy.
[Brief description of the drawings]
FIG. 1 is a plan view of a multi-grinding machine provided with a machining area cover device according to an embodiment of the present invention.
2 is a cross-sectional view taken along line II-II in FIG.
FIG. 3 is a schematic perspective view of a processing area cover device according to an embodiment of the present invention.
FIG. 4 is a perspective view of a processing area cover device according to an embodiment of the present invention.
FIG. 5 is an exploded view of the machining area cover device according to the embodiment of the present invention.
FIG. 6 is an operation diagram of the machining area cover device according to the embodiment of the present invention.
FIG. 7 is a perspective view of the frame structure of the machining area cover device according to the embodiment of the present invention.
FIG. 8 is a plan view of a multi-grinding machine equipped with a processing area cover device in the prior art.
9 is a cross-sectional view taken along line IX-IX in FIG.
[Explanation of symbols]
1 bed 2 table 3 grinding wheel base 4 headstock 5 tailstock 6 sizing device / rest device 7 grinding wheel 8 grinding fluid nozzle 9 grinding wheel cover 9a upper surface 10 horizontal support shaft A main part A1 first cover part A2 second Cover portion B Back plate portion 11, 16 Top surface portion 12 Slope portion 13, 17 Front portion 14, 15; 18, 19 Side surface portion 19a Peripheral portion 19b Opening portion 20 Hinge 21 Frame member 22 Cover plate member 23 Stopper 24, 25, 26 Door Plates 22a, 24a, 25a Flange 27 Edge 28 Left opening 29 Right opening 30 First opening / closing door 31 Second opening / closing door 32 Roller 33 Rail 34 Handle

Claims (8)

The grinding wheel is supported rotatably, covers the grinding wheel base supported by the bed so that it can move forward and backward with respect to the workpiece, and the upper part of the grinding wheel. The workpiece side turns upward and rearward to open and close the upper part of the grinding wheel. A grinding machine having a grinding wheel cover supported on the grinding wheel platform freely, fixedly installed on a bed on the workpiece side, and a workpiece, front side of the workpiece, the grinding wheel table and the grinding wheel cover. Grinding characterized in that it consists of a cover that is integrally covered and the back side is open, and the upper part of the grinding wheel base side of the cover is provided with a lid that can be opened and closed to allow the turning opening of the grinding wheel cover. Machining area cover device for the board. 2. The processing area cover device for a grinding machine according to claim 1, wherein the lid is provided so that the grindstone base side is turnable upward and forward. The working area cover device in a grinding machine according to claim 1 or 2, wherein an opening that can be opened and closed by a door is formed on a side and / or front of the cover. It is mounted so that the grinding wheel part protrudes to the front and can stand upright on the grinding wheel base side, fits with a gap in the inner peripheral surface of the cover, closes the back of the space of the cover, and advances and retreats the grinding wheel base The processing area cover apparatus in the grinding machine according to any one of claims 1 to 3, further comprising a back plate portion that is a plate body that moves forward and backward with respect to the cover. The back plate is a gate-shaped flat plate.The upper side of the inner edge is in contact with the upper surface of the grinding wheel cover, both sides of the inner edge are in contact with the both sides of the grinding wheel cover, and upright when the grinding wheel cover is in use. The processing area cover device in the grinding machine according to claim 4, which is fixed to the grinding wheel cover so as to be in a state. 6. The cover has a wall surface through which a headstock supporting a workpiece is displaceably penetrated in the axial direction of the workpiece, and always surrounds at least a tip portion of the headstock supporting the workpiece inward. The processing area cover device in the grinding machine according to any one of the above. The processing area cover device for a grinding machine according to any one of claims 1 to 6, wherein the cover is formed of a frame structure and a sheet metal material attached thereto. The processing area cover device in a grinding machine according to any one of claims 1 to 7, wherein a plurality of grinding wheels are supported in the axial direction on the grinding wheel base, and a single grinding wheel cover covers the entire grinding wheel .

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