JP2009136936A - Grindstone shielding device for angular cylindrical grinder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grindstone shielding device for an angular cylindrical grinder, which shields an angular grindstone so as to be invisible from outside, with a simple fixed cover or without using the fixed cover, by paying attention to the fact that an angular wheel spindle stock transversely traverses. <P>SOLUTION: The grindstone shielding device is formed of: an openable door 41 which is openably arranged in a whole body cover 40 set on a head 11; an opening/closing device 42 for opening/closing the openable door; a traverse moving means (S102) for moving a traverse stand 22 to a shielded traverse location at which the angular grindstone 33 is shielded with a security cover 43 fixed at a fixed location corresponding to a tailstock 14; and opening/closing device control means (S104, S106) for activating the opening/closing device to open the openable door, based on movement of the traverse stand to the shielded traverse location by the traverse moving means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a grindstone shielding device in an angular cylindrical grinder that shields an angular grindstone from an operator position when a workpiece is attached or detached.

  In general, in a cylindrical grinder, an entire cover is provided to cover the entire grinder, and an opening is provided on the worker position side of the entire cover so that a workpiece supported between the headstock and the tailstock can be attached and detached. An opening / closing door is provided at the opening so as to be openable and closable. When the workpiece is attached or detached, the door is opened and the workpiece is attached or detached manually by the operator.

  In this type of angular cylindrical grinder, for example, as described in Patent Document 1, when a workpiece is attached or detached, in order to ensure the safety of the operator from the rotating angular grindstone, A movable (rotating) security cover is provided to cover the front side.

The safety cover described in Patent Document 1 is positioned at a retracted position that does not hinder grinding during grinding of the workpiece, but is rotated by a cylinder device when the workpiece is attached or detached. It is designed to be interposed between the angular grindstone and the workpiece. This prevents an operator who attaches or detaches the workpiece from touching the angular grindstone.
Japanese Patent Laid-Open No. 53-44987

  In the security cover described in Patent Document 1 described above, since the safety cover is configured to open and close, sludge or the like accumulates on the movable part of the safety cover with use, and the safety cover becomes difficult to move or breaks down. It becomes a factor. Further, since a cylinder device that operates the safety cover and a switch for confirming the opening and closing of the safety cover are required, there is a problem that the number of parts increases and the cost increases.

  Moreover, in an angular cylindrical grinder, the angular grindstone is usually inclined at 60 °, so that the inclined side surface of the angular grindstone can be obtained simply by interposing a safety cover between the grinding surface of the angular grindstone and the workpiece. There is a peculiar problem that it can be seen from the worker position. In this case, for example, it is not impossible to horizontally move the work table on which the headstock and the tailstock are installed to hold the inclined side surface of the angular grindstone and the safety cover in a corresponding positional relationship. If the workpiece table is moved laterally, the positional relationship between the workpiece supported between the headstock and the tailstock and the opening of the entire cover will be shifted, and this will impede the work for attaching and detaching the workpiece. Cause problems.

  The present invention was made in order to solve the above-described conventional problems, paying attention to the fact that the angular type grindstone traverses in the lateral direction, with a simple fixed cover or without using a fixed cover, It is an object of the present invention to provide a grindstone shielding device in an angular cylindrical grinder that shields an angular grindstone from being seen.

  In order to solve the above-mentioned problem, a feature of the invention according to claim 1 is that a headstock and a tailstock for supporting a workpiece are installed on a table installed on a bed, and a traverse table is installed on the bed. A traverse base is supported so as to be able to traverse in a direction parallel to the axis of the object, and an angular type grinding wheel base is supported on the traverse base so as to be movable in a direction intersecting the movement direction of the traverse base. An angular cylindrical grinder that is rotatably supported about an axis inclined at a predetermined angle with respect to the moving direction of the traverse table and has an angular grindstone attached to one end of the grindstone shaft that faces the tailstock side. An open / close door provided to be opened / closed on the entire cover installed, an open / close device for opening / closing the open / close door, and the angular grindstone against the tailstock when the workpiece is attached / detached. A traverse moving means for moving to a shielded traverse position shielded by a security cover fixed at a fixed position, and operating the opening / closing device based on the traverse moving means moving the traverse base to the shielded traverse position. And an opening / closing device control means for opening the opening / closing door.

  A feature of the invention according to claim 2 is that, in claim 1, a fixed security cover for shielding the angular grindstone is attached to the tailstock.

  The invention according to claim 3 is characterized in that a headstock and a tailstock for supporting a workpiece are installed on a workpiece table installed on a bed, and the traverse table is parallel to the axis of the workpiece on the bed. The angular grinding wheel table is supported on the traverse table so as to be movable in a direction intersecting the moving direction of the traverse table, and the grinding wheel shaft is supported on the grinding wheel table in the moving direction of the traverse table. In an angular cylindrical grinder in which an angular grindstone is attached to one end of the grindstone shaft facing the tailstock side, and is rotatably supported around an axis inclined at a predetermined angle. An opening / closing door provided to be openable and closable, an opening / closing device for opening / closing the opening / closing door, and a shield to which the angular grindstone is shielded by the tailstock when the workpiece is attached / detached. Traverse moving means for moving to the berth position; and opening / closing device control means for operating the opening / closing device to open the open / close door based on the traverse table being moved to the shielded traverse position by the traverse moving means; It is to have.

  According to the first aspect of the present invention, when the workpiece is attached or detached, the traverse base supporting the grindstone base is moved to the shielding traverse position where the angular grindstone is shielded by the security cover fixed at the fixed position corresponding to the tailstock. In this state, the door is opened so that the angular grindstone can be shielded from the operator's position by a fixed security cover when the workpiece is attached or detached by using the traverse movement of the traverse base. Will be able to. This eliminates the need for a cylinder device that operates the safety cover, a switch that confirms the opening and closing of the safety cover, etc., and fixing the safety cover prevents the safety cover from malfunctioning due to sludge, etc. The shielding function of the angular grindstone can be stably performed.

  In addition, by using the traverse movement of the traverse table, the angled side of the angular grindstone can be made difficult to see from the operator position by positioning the angular grindstone on the tailstock side. The shielding action of the angular grindstone can be effectively performed.

  According to the second aspect of the present invention, since the fixed safety cover that shields the angular grindstone is attached to the tailstock, the function of shielding the angular grindstone by a simple operation of simply fixing the safety cover on the tailstock. Can be performed reliably.

  According to the third aspect of the present invention, when the workpiece is attached or detached, the open / close door is opened in a state where the traverse base supporting the grindstone base is moved to the shield traverse position where the angular grindstone is shielded by the tailstock. Therefore, it is possible to shield the angular grindstone when attaching and detaching a workpiece by using the traverse movement of the traverse base and the tailstock without attaching any special components. By moving to the platform side, the inclined side surface of the angular grindstone can be made difficult to see from the operator position.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings. FIG. 1 is a plan view showing the entirety of an angular cylindrical grinder 10. A workpiece table 12 is fixedly placed on a bed 11 of the cylindrical grinder 10, and on the workpiece table 12. The headstock 13 and the tailstock 14 are installed facing each other. A spindle ram 17 and a tailstock ram 18 to which centers 15 and 16 are attached are slidably supported on the spindle stock 13 and the tailstock 14. The workpiece W supported by both centers 15 and 16 is driven at both ends around an axis parallel to the Z axis by drive motors 19 and 20 installed on the headstock 13 and the tailstock 14. Yes.

  In addition, a pair of guide rails 21 are provided on the bed 11 along the Z-axis direction parallel to the axis of the workpiece W, and a traverse base 22 is guided and supported on these guide rails 21 so as to be able to traverse in the Z-axis direction. Has been. The traverse base 22 is traversed in the Z-axis direction by a ball screw feed mechanism 24 driven by a Z-axis servo motor 23, and the position of the traverse base 22 in the Z-axis direction is shifted to the Z-axis servo motor 23. It is detected by the connected encoder 25.

  A pair of guide rails 26 are provided on the traverse base 22 along an inclined axis direction (hereinafter referred to as an XA axis direction for convenience) inclined at a predetermined angle (60 °) with respect to the Z axis. In addition, an angular type grindstone table 27 is guided and supported so as to be movable back and forth in the XA axis direction. The grinding wheel base 27 is moved forward and backward in the XA axis direction by a ball screw feed mechanism 29 driven by an XA axis servo motor 28. The position of the grinding wheel base 27 in the XA axis direction is the same as that of the XA axis servo motor 28. Detected by the linked encoder 30.

  A grinding wheel shaft 31 is supported on the grinding wheel base 27 so as to be rotatable about an axis orthogonal to the XA axis, and is rotated by a grinding wheel drive motor 32 installed on the grinding wheel base 27 via a belt transmission device 34. It has become. An angular cylindrical grindstone (hereinafter simply referred to as “angular grindstone”) 33 is attached to one end of the grindstone shaft 31 facing the tailstock 14 side. The angular grindstone 33 is ground parallel to the rotation axis of the workpiece W. A surface 33a is provided.

  Thereby, the cylindrical portion of the workpiece W can be ground by the plunge grinding by the grinding surface 33a of the angular grindstone 33 by the forward and backward movement of the grinding wheel base 27 in the XA axis direction, and the workpiece W can be ground by the traverse movement of the traverse base 22. The cylindrical portion can be ground by traverse grinding.

  An entire cover 40 that covers the cylindrical grinding machine 10 is attached to the bed 11 of the cylindrical grinding machine 10. An opening 40 a having a predetermined width B is formed on the front surface of the entire cover 40 corresponding to the worker position for attaching and detaching the workpiece W or the like. The entire cover 40 is provided with a sliding opening / closing door 41 that opens and closes the opening 40a so as to be opened and closed in the left-right direction. The opening / closing door 41 is opened and closed by an opening / closing device 42 formed of, for example, an air cylinder. The open / close door 41 is closed when the workpiece W is ground, but is opened when the workpiece W is attached / detached, so that the operator can attach / detach the workpiece W. As will be described later, the door 41 is electrically interlocked so as to be opened under the condition that the traverse base 22 is positioned at the traverse end on the tailstock 14 side.

  When the workpiece W is attached / detached, the traverse base 22 is moved to the traverse end (right end in FIG. 1) on the tailstock 14 side by the Z-axis servomotor 23, whereby the front side of the angular grindstone 33 is moved to the tailstock. 14 is located behind. On the tailstock 14, a fixed security cover 43 that shields the angular grindstone 33 from the operator position when the workpiece W is attached or detached is attached. That is, as shown in FIG. 2, the safety cover 43 is fixed to a tailstock body 14 a in which the tailstock ram 18 is slidably fitted, and the axial direction of the workpiece W and the upward direction of the tailstock 14. It consists of a rectangular plate-shaped cover extending in the direction. The fixed security cover 43 is interposed between the grinding surface 33a of the angular grindstone 33 and the workpiece W when the traverse base 22 is moved to the traverse end on the tailstock 14 side, and shields the angular grindstone 33. It is supposed to be. In this case, by moving the angular grindstone 33 to the tailstock 14 side, the inclined side surface of the angular grindstone 33 that is normally exposed to the worker side becomes a blind spot from the worker position and is difficult to see. Thus, the relatively small security cover 43 prevents the operator from seeing or touching the front surface (grinding surface 33a) and the inclined side surface of the angular grindstone 33 from the operator position.

  As shown in FIG. 1, a truing device 50 for truing the angular grindstone 33 is disposed on the head stock 13 installed on the workpiece table 12. The truing device 50 includes a truing tool 51 and a drive motor 52 that rotationally drives the truing tool 51. The truing device 50 is angular by moving the traverse base 22 in the Z-axis direction with the grindstone base 27 positioned at a predetermined position. The grinding surface 33a of the grindstone 33 can be trued.

  Next, the operation in the above embodiment will be described. When grinding the workpiece W, the door 41 is closed, the traverse base 22 is positioned at a predetermined position, and the grindstone base 27 is advanced in the XA axis direction. The cylindrical portion of the workpiece W is ground by plunge grinding. Alternatively, when the traverse base 22 is traversed while the grindstone base 27 is advanced to a predetermined position, the cylindrical portion of the workpiece W is ground by traverse grinding by the grinding surface 33a of the angular grindstone 33.

  When the grinding of the workpiece W is completed, as shown in FIG. 3, the grindstone table 27 is retracted to the retracted end position (step S100), and the traverse table 22 is moved toward the traverse end position on the tailstock 14 side. It is moved (step S102). When the traverse base 22 is moved to the traverse end position, the traverse base 22 is stopped at the traverse end position. When it is detected based on the detection signal from the encoder 25 that the traverse base 22 has been moved to the traverse end position (step S104), the opening / closing device 42 for opening / closing the opening / closing door 41 in the opening direction. Operation is commanded (step S106).

  That is, when the traverse base 22 is moved to the traverse end position, as shown in FIG. 4, the front side of the angular grindstone 33, that is, the grinding surface 33 a of the angular grindstone 33 and the inclined side surface of the angular grindstone 33, The front cover and the side surface of the angular grindstone 33 cannot be seen from an operator standing in front of the opening 40a of the entire cover 40 by being completely shielded by the security cover 43 fixed on the base 14.

  The above-described step S102 constitutes the traverse moving means in the claims, and step S104 and step S106 constitute the opening / closing device control means in the claims.

  As described above, when the opening / closing device 42 for opening / closing the opening / closing door 41 is instructed to open / close based on the detection signal of the encoder 25 that detects the position of the traverse base 22, the opening / closing device 42 opens / closes the opening / closing door. 41 is opened and the opening 40a is opened. In this state, the work W is attached and detached by the operator. In this case, since the grinding surface 33a and the inclined side surface of the angular grindstone 33 are completely shielded from the operator position by the security cover 43 on the tailstock 14, the workpiece W can be safely attached and detached.

  Thus, according to the first embodiment described above, the front side of the angular grindstone 33 is shielded by the security cover 43 fixed to the tailstock 14 by using the traverse movement of the traverse base 22. Therefore, the angular grindstone 33 can be shielded by the fixed safety cover 43, and a cylinder device for operating the safety cover 43, a switch for confirming opening / closing of the safety cover 43, and the like can be eliminated. Further, since the safety cover 43 can be fixed, the safety cover 43 does not malfunction due to sludge or the like, and the shielding function of the angular grindstone 33 can be stably performed over a long period of time.

  Moreover, since the angular grindstone 33 is positioned on the tailstock 14 side instead of the spindle stock 13 side using the traverse movement of the traverse base 22, the inclined side surface of the angular grindstone 33 can be seen from the operator position. It is possible to prevent the angular grindstone 33 from being effectively shielded by the small security cover 43.

  Further, since the traverse movement of the traverse table 22 is used, there is no need to move the workpiece table 12, and the adverse effect of moving the workpiece table 12, that is, the entire cover 40 when the workpiece W is attached or detached. Since the positional relationship between the opening 40a and the workpiece W is deviated, there is no possibility that the workpiece W may be attached or detached.

  In the first embodiment described above, the example in which the safety cover 43 is fixed on the tailstock 14 has been described. However, the safety cover 43 may be the workpiece table 12 on which the tailstock 14 is installed, or the workpiece table. Even if it fixes to the bed 11 which installed 12, the same effect as mentioned above can be expected. Of course, the fixing position of the security cover 43 in this case is a position corresponding to the tailstock 14.

  In the first embodiment described above, the open / close door 41 is opened by the open / close device 42 based on the detection signal that the traverse base 22 has been moved to the traverse end position. In a grinding machine configured to be manually opened and closed, the door 41 is normally locked so that it cannot be opened by the lock mechanism, and the lock mechanism is locked based on the traverse base 22 being moved to the traverse end position. It may be canceled. In order to shield the angular grindstone 33, the traverse base 22 does not necessarily have to be moved to the traverse end position, and may be moved to the shield traverse position on the tailstock 14 side that can shield the angular grindstone 33.

  Furthermore, in the first embodiment described above, the angular type grindstone base 27 is provided so as to be capable of moving forward and backward along an inclined axis direction (XA axis direction) inclined by a predetermined angle (60 °) with respect to the Z axis. Although the example has been described, the present invention can also be applied to an angular cylindrical grinder that supports the angular grindstone table 27 so as to be movable back and forth in the X-axis direction orthogonal to the Z-axis direction on the traverse table 22. .

  FIG. 5 shows a second embodiment of the present invention. The difference from the first embodiment described above is that the security cover 43 is eliminated. That is, in the first embodiment, the angular grindstone 33 is shielded from the operator position by the security cover 43 fixed on the tailstock 14, but depending on the specifications of the angular cylindrical grinder 10. When the tailstock 14 (the tailstock body 14a) has a height dimension sufficient to shield the front side of the angular grindstone 33 from the operator position, or the diameter of the angular grindstone 33 is small, the existing core When the front of the angular grindstone 33 can be sufficiently shielded by the pedestal 14, the tailstock is moved by moving the traverse pedestal 22 to the traverse end position on the side of the pedestal 14, without providing the security cover 43. The angular grindstone 33 can be shielded from the operator position by 14 itself.

  Since other configurations are the same as those described in the first embodiment, the same configurations are denoted by the same reference numerals, and description thereof is omitted.

  As described above, according to the second embodiment, the angular grindstone 33 can be shielded from the operator position using the tailstock 14, so that the fixed security cover 43 can be eliminated and a special component is attached. There is no need. Therefore, the shielding function of the angular grindstone can be realized with a simpler configuration as compared with the first embodiment.

  Although the present invention has been described with reference to the embodiments, the present invention is not limited to the configurations described in the embodiments and does not depart from the gist of the present invention described in the claims. It can take various forms.

1 is a plan view showing the entirety of an angular cylindrical grinder showing a first embodiment of the present invention. FIG. 2 is a side view of FIG. 1 viewed from the rear of the tailstock. It is a flowchart explaining the shielding operation | movement of an angular grindstone, and the opening / closing operation | movement of an opening / closing door. It is a top view of the angular type cylindrical grinding machine which shows the operation state of FIG. It is a top view which shows the whole angular-type cylindrical grinder which shows other embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Bed, 12 ... Workpiece table, 13 ... Spindle table, 14 ... Tailstock, 22 ... Traverse table, 23, 28 ... Servo motor, 25, 30 ... Encoder, 27 ... Angular type grinding wheel table, 31 ... Grinding wheel shaft , 33 ... angular grindstone, 40 ... whole cover, 41 ... opening and closing door, 42 ... opening and closing device, 43 ... security cover, W ... workpiece, S102 ... traverse moving means, S104, S106 ... opening and closing device control means.

Claims (3)

A spindle table and a tailstock that support a workpiece are installed on a workpiece table installed on a bed, and a traverse table is supported on the bed so as to be able to traverse in a direction parallel to the axis of the workpiece. An angular type grindstone table is supported on the traverse table so as to be movable in a direction crossing the moving direction of the traverse table, and the grindstone axis rotates around an axis inclined at a predetermined angle with respect to the moving direction of the traverse table. In an angular cylindrical grinder with an axially mounted grindstone attached to one end facing the tailstock side of the grindstone shaft,
An open / close door provided on the entire cover installed on the bed so as to be openable / closable, an open / close device for opening / closing the open / close door, and the angular grindstone corresponding to the tailstock when the workpiece is attached / detached. A traverse moving means for moving to a shielded traverse position shielded by a security cover fixed at a fixed position, and operating the opening / closing device based on the traverse moving means moving the traverse base to the shielded traverse position. And an opening / closing device control means for opening the opening / closing door. A grindstone shielding device in an angular cylindrical grinder.   2. The grindstone shielding device in an angular cylindrical grinder according to claim 1, wherein a fixed security cover that shields the angular grindstone is attached to the tailstock. A spindle table and a tailstock that support a workpiece are installed on a workpiece table installed on a bed, and a traverse table is supported on the bed so as to be able to traverse in a direction parallel to the axis of the workpiece. An angular type grindstone table is supported on the traverse table so as to be movable in a direction crossing the moving direction of the traverse table, and the grindstone axis rotates around an axis inclined at a predetermined angle with respect to the moving direction of the traverse table. In an angular cylindrical grinder with an axially mounted grindstone attached to one end facing the tailstock side of the grindstone shaft,
An open / close door provided on the entire cover installed on the bed so as to be openable / closable, an open / close device that opens / closes the open / close door, and the traverse base is shielded by the angular grindstone by the tailstock when the workpiece is attached or detached Traverse moving means for moving to a shielded traverse position, and an opening / closing device for operating the opening / closing device to open the open / close door based on movement of the traverse base to the shielded traverse position by the traverse moving means A grindstone shielding device in an angular cylindrical grinder characterized by comprising control means.

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