JP2018075690A - Grinding equipment - Google Patents

Abstract

A grinding apparatus capable of automatically and accurately positioning a table in the left-right direction is provided. A grinding wheel 30 for grinding a workpiece W, a table 10 that supports the workpiece W and is driven by a wire or belt 58 and moves in a horizontal direction, and a motor that moves the table 10 via the wire or belt 58. 51, and a control device 40 that controls the movement of the table 10 by controlling the motor 51. The control device 40 stops the movement of the table 10 after setting the moving speed of the table 10 to a predetermined stop preparation speed. Or reverse. Thereby, the inertia force at the time of a stop or inversion can be made small, extension and slack of belt 58 grade | etc., Can be suppressed, and the excess of the table 10 can be suppressed. As a result, the accuracy of the stop or reverse position is increased. [Selection] Figure 3

Description

  The present invention relates to a grinding apparatus having a belt-driven or wire-driven table feed mechanism, and more particularly to a grinding apparatus capable of positioning a table moving in the left-right direction with high accuracy.

  2. Description of the Related Art Conventionally, there is a grinding apparatus provided with a belt drive type or wire drive type table feed mechanism that drives a table on which an workpiece is fixed by a wire, a belt, or the like to reciprocate in the left-right direction. This type of table feed mechanism is employed in, for example, a grinding device that can switch the movement of the table in the left-right direction between automatic feed by motor drive and manual feed by rotating a handle.

  For example, Patent Document 1 discloses a left and right table feed mechanism of a surface grinding machine having wires attached over the left and right movement directions of the table. In the left and right table feed mechanism of the same document, the wire is wound around the drum a plurality of times while being attached to the fixing portion on the other side from the fixing portion on the one side attached to the table.

  Then, by rotating the drum clockwise by rotation input from the servo motor or the handle, the wire on one side is wound around the drum, the wire on the other side is rewound, and the table moves to the other side. On the other hand, by rotating the drum counterclockwise, the wire on the other side is wound around the drum, the wire on one side is rewound, and the table moves to one side. Thus, by switching the rotation direction of the drum, the table is reciprocated in the left-right direction, and the workpiece is ground.

  In the surface grinder of the same document, the servo motor is driven by a computer based on the information on the rotation angle output from the servo motor, and the rotation direction and rotation speed of the rotation shaft of the servo motor are controlled.

  Further, the left and right table feed mechanism disclosed in the same document is configured so that the rotational power input from the handle is transmitted to the drum when the pinion for manual operation meshes with the internal gear formed on the inner peripheral wall of the drum. Has been. The rotating shaft for manual operation of the handle having a manual operation pinion attached to the tip can be pushed and pulled in the front-rear direction, and the operator pushes and pulls the handle for manual operation with respect to the internal gear. The pinion is engaged and disengaged. As a result, an automatic operation in which automatic feeding by the power of the motor is performed and a manual operation in which manual feeding is performed by rotating the handle are switched.

JP 2006-21270 A

  However, as in the prior art described above, the driving method in which the table is moved using a wire, a belt, or the like has a problem that the position at which the table is stopped or reversed is shifted.

  That is, in the grinding process, when the moving table is stopped or when the feed direction of the table is reversed, the tension due to the inertial force of the table or the like acts on the wire or the like. The position to be reversed is shifted. Specifically, the error of the table stop or reversal position in this type of grinding apparatus of the prior art was about 1 mm at the smallest. When the feed rate of the table is large, specifically when it is about 20 m / min, the error of the stop or reversal position becomes even larger, sometimes about 15 mm.

  Such a shift of the table reversal position becomes a problem particularly when a step shape or the like is formed on the upper surface of the workpiece by reversing the table. That is, it is not preferable because the processing dimension of the workpiece is shifted due to the shift of the table reversal position. Therefore, in order to increase the machining accuracy of the workpiece, it has been required to control the stop or reverse position of the table with high accuracy.

  In the above-described prior art, the automatic operation pinion attached to the rotating shaft of the servo motor is in mesh with the internal gear of the drum even during manual operation. For this reason, the servo motor rotates even during manual operation by rotating operation from the handle, and operability in manual operation is impaired.

  On the other hand, the structure which isolate | separates a servomotor at the time of manual operation is also considered. However, if the servo motor is disconnected during the manual operation, the relationship between the rotational position of the servo motor and the position of the table is shifted before and after the manual operation. Therefore, in the method of controlling the rotation direction and rotation angle of the servo motor as in the prior art described above, the position of the table can be accurately controlled unless the origin position is set again after the manual operation is performed. There is a problem that it is not possible.

  In addition, as in the prior art described above, in a method in which an operator pushes and pulls a handle to switch between automatic operation and manual operation, there is a problem that operation switching operation is complicated. When switching between automatic operation and manual operation, the operator must attach or remove the stopper member to stop the rotation of the handle in addition to the operation of pushing and pulling the handle to engage and disengage the manual operation pinion with the internal gear. Don't be.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a grinding apparatus capable of automatically and highly accurately positioning a table in the left-right direction.

  Another object of the present invention is to provide a grinding apparatus that can easily switch between automatic operation by motor drive and manual operation by handle operation, has excellent operability, and high positioning accuracy. is there.

  The grinding apparatus of the present invention includes a grinding wheel for grinding a workpiece, a table that supports the workpiece and is driven by a wire or a belt and moves in a horizontal direction, and a motor that moves the table via the wire or the belt. And a control device that controls the movement of the table by controlling the motor, and the control device stops or reverses the movement of the table after setting the moving speed of the table to a predetermined stop preparation speed. It is characterized by making it.

  According to the grinding apparatus of the present invention, a grinding wheel for grinding a workpiece, a table that supports the workpiece and is driven by a wire or a belt and moves in a horizontal direction, and the table is moved via the wire or the belt. And a control device that controls the movement of the table by controlling the motor, and the control device stops the movement of the table after setting the moving speed of the table to a predetermined stop preparation speed. Or reverse. Thereby, the inertia force at the time of a stop or inversion can be made small, the extension and slack of a wire etc. can be suppressed, and the excess of a table can be suppressed. As a result, the accuracy of the stop or reverse position is increased. Specifically, according to the present invention, the error of the stop or reverse position of the table, which was about 1 mm to 15 mm in the prior art, can be reduced to about 0.15 mm.

  Further, since it is sufficient to decelerate to a predetermined stop preparation speed immediately before the table movement stops or reverses, it is not necessary to slow down the table movement speed during grinding. Therefore, the accuracy of the stop position of the table can be increased without reducing the efficiency of the grinding operation.

Further, according to the grinding apparatus of the present invention, a dog which is fixed to the table so as to be adjustable in position and moves together with the table, and a detection means which is attached to a saddle which movably supports the table and detects the dog. The control device may decelerate the table to the stop preparation speed based on the dog information detected by the detection means, and stop or reverse the movement of the table. Thereby, the table can be controlled to an accurate position without detecting the rotation angle of the motor. Therefore, for example, even when the motor is disconnected from the drive system such as a wire when performing manual feeding and then connected again, the position of the table is accurately grasped based on the detection information of the dog by the detection means. can do.
Further, by adjusting the position of the dog, the setting of the position at which the table is stopped and the position at which the table is reversed can be easily changed.

  Further, according to the grinding apparatus of the present invention, the dog is formed with a deceleration instruction section and a stop instruction section, and the control device reads the table when the detection section detects the deceleration instruction section. The table may be decelerated to a stop preparation speed, and the movement of the table may be stopped or reversed when the detection instruction is detected by the detection means. Thus, by detecting one dog, it is possible to execute control for decelerating the table and control for stopping or reversing the table, and highly accurate position control can be performed with a small number of components. In addition, it is easy to set the stop and reverse positions.

  Further, according to the grinding apparatus of the present invention, the stop preparation speed may be 0.1 m / min to 1.0 m / min. By appropriately setting the stop preparation speed in this manner, it is possible to realize highly accurate position control while suppressing problems such as a decrease in productivity and knocking due to a long machining time.

  Further, according to the grinding apparatus of the present invention, there is provided a feed handle for manually moving the table via the wire or the belt, the automatic feed for moving the table by the power of the motor, and the feed It may be possible to switch between manual feed for moving the table by power input from the handle. As a result, a highly accurate automatic feed using the power of the motor and a manual feed excellent in operability by the wire drive system or the belt drive system are realized.

  According to the grinding apparatus of the present invention, the pulley around which the wire or the belt is wound so as to be able to transmit power, and the rotation shaft of the feed handle and the rotation shaft of the pulley are connected in a freely connectable manner. You may have a clutch and the 2nd clutch which connects the rotating shaft of the said motor, and the rotating shaft of the said pulley so that it can connect intermittently. With such a configuration, the first clutch and the second clutch are operated to easily switch between automatic operation in which automatic feeding is performed by the power of the motor and manual operation in which manual feeding is performed by input from the feed handle. be able to.

  Further, at the time of manual operation, the second clutch can be disconnected to separate the motor rotation shaft from the pulley rotation shaft. As a result, the motor is not carried around during manual operation, and the manual feed operability is improved.

According to the grinding device of the present invention, the first clutch and the second clutch may be interlocked so that when one is in a connected state, the other is in a disconnected state. Thereby, switching with an automatic driving | operation and a manual driving | operation can be reliably performed by easy operation.
Moreover, the first clutch and the second clutch can be connected / disconnected with a common drive device, and the device can be simplified.

1 is a perspective view of a grinding apparatus according to an embodiment of the present invention. It is a block diagram showing a schematic structure of a grinding device concerning an embodiment of the present invention. It is a front view of the table and saddle of the grinding device concerning the embodiment of the present invention. It is an AA line sectional view of a dog of a grinding device concerning an embodiment of the present invention. It is a front view which shows (A) stop preparation position and (B) stop position of the table of the grinding device which concerns on embodiment of this invention. It is the schematic which shows the state of (A) automatic feed of the table left-right feed apparatus of the grinding apparatus which concerns on embodiment of this invention, and (B) manual feed. It is a figure which shows the air circuit for clutch operation | movement of the grinding apparatus which concerns on embodiment of this invention.

Hereinafter, a grinding device according to an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an outline of a grinding apparatus 1 according to an embodiment of the present invention. The grinding device 1 is a device for grinding and forming the workpiece W with the grinding wheel 30 that is rotationally driven by moving the grinding wheel 30 relative to the workpiece W in the front-rear, left-right, and vertical directions.

As shown in FIG. 1, the grinding apparatus 1 includes a grinding wheel 30 for grinding a workpiece W, a table 10 on which the workpiece W is placed and fixed, and a saddle 20 that supports the table 10.
The saddle 20 is provided above the frame 2 and is supported on the upper part of the frame 2 so as to reciprocate in the horizontal front-rear direction (hereinafter referred to as “Z direction” as appropriate). A table 10 for supporting the workpiece W is provided above the saddle 20 so as to be capable of reciprocating in the horizontal left-right direction (hereinafter referred to as “X direction” as appropriate).

  The feed mechanism of the table 10 is a belt drive system driven by a belt 58 (see FIG. 6) described later. As the feed mechanism of the table 10, a wire drive system driven by a wire may be employed.

The grinding wheel 30 is rotatably supported by a wheel head 32. Further, the wheel head 32 that supports the grinding wheel 30 is supported by the column 33 so as to reciprocate in the vertical direction (hereinafter referred to as “Y direction” as appropriate).
The grinding wheel 30, the saddle 20 and the table 10 are controlled by a control device 40 (see FIG. 2) to be described later, and reciprocate in the aforementioned directions.

  The grinding wheel 30 is formed in a substantially disc shape and rotates around a wheel shaft extending in the Z direction. When the grinding wheel 30 rotates and contacts the workpiece W, the upper surface of the workpiece W is ground. Further, the grinding wheel 30 is covered with a grinding wheel cover 31 that opens downward.

  A rail 11 is provided on the front side of the table 10 along the X direction, and a dog 12 is attached to the rail 11. The dog 12 is slidable along the rail 11 and is fixed to the rail 11 so that its position can be adjusted. A dog detector 21 is provided below the dog 12 and above the saddle 20 as detection means for detecting the dog 12.

  A chuck 16 and a dressing device 17 are provided on the top of the table 10. The chuck 16 is, for example, an electromagnetic chuck having an electromagnet or the like inside. The chuck 16 supports the workpiece W placed on the chuck 16 so as not to move by the magnetic force.

  The dressing device 17 is a device that performs dressing of the grinding wheel 30 and includes, for example, a diamond dresser. By the dressing device 17, the grinding wheel 30 can be maintained in a suitable state, and the precision and quality of grinding can be maintained. The dressing device 17 is not limited to the table type, and may be an upper dresser device, a rotary dresser device, a swing dresser device, or the like.

  A left / right feed handle 15 and a front / rear feed handle 42 are provided on the front surface of the saddle 20 of the grinding apparatus 1. When the operator turns the left / right feed handle 15, the table 10 moves in the X direction, and when the worker turns the front / rear feed handle 42, the saddle 20 moves in the Z direction. Thereby, the operator can perform the horizontal alignment of the workpiece W and the grinding wheel 30.

  Although not shown, a vertical feed handle 43 (see FIG. 2) for moving the grinding wheel 30 in the Y direction is provided on the side surface of the saddle 20 or the operation panel. Thereby, the operator can perform the positioning of the grinding wheel 30 in the vertical direction.

  The front / rear feed handle 42 and the vertical feed handle 43 generate pulses for driving a motor (not shown) of a saddle front / rear feed device 25 (see FIG. 2) and a vertical feed device 35 (see FIG. 2), which will be described later. This is a so-called manual pulse handle. On the other hand, the left / right feed handle 15 is a feed handle for moving the table 10 via the belt 58 by directly using the rotational power input by the operator's operation.

  FIG. 2 is a block diagram showing a schematic configuration of the grinding apparatus 1. As shown in FIG. 2, the grinding apparatus 1 includes a control device 40 that performs various controls and calculations. The control device 40 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a storage unit that stores processing condition setting values, calculation results, and the like. The control device 40 may be provided inside the grinding device 1 or may be provided inside the casing of the operation panel 44 or the like.

  Connected to the control device 40 are a dog detector 21, a changeover switch 41, a forward and backward feed handle 42, a vertical feed handle 43, an operation panel 44, and other input devices and sensors (not shown) that can input signals. The control device 40 is connected to a table left / right feeding device 50, a saddle longitudinal feeding device 25, a wheel vertical feeding device 35, a wheel driving device 36, an electromagnetic control valve 63, and other devices to be controlled (not shown). .

  The dog detector 21 is detection means for detecting the dog 12 (see FIG. 1) in a non-contact manner. As the dog detector 21, for example, a proximity sensor such as a capacitance type, an induction type, an ultrasonic type, a photoelectric type, or a magnetic type is used.

  When the dog detector 21 detects the dog 12, the detection result is input to the control device 40. And the control apparatus 40 performs a predetermined | prescribed calculation based on the detection result input from the dog detector 21, and controls the table left-right feeding apparatus 50 grade | etc.,.

  The changeover switch 41 is an automatic feed that moves the table 10 (see FIG. 1) by the power of the motor 51 (see FIG. 6) and a manual that moves the table 10 by the power input from the left and right feed handle 15 (see FIG. 1). This switch is used to switch between feed and feed. The changeover switch 41 is provided on the front surface of the saddle 20 (see FIG. 1) or the operation panel 44, for example. Based on the input of the changeover switch 41, the control device 40 controls an electromagnetic control valve 63 of an air circuit 60 (see FIG. 7) described later. Thereby, automatic feed and manual feed are switched.

  As described above, the front / rear feed handle 42 and the vertical feed handle 43 are operated by an operator to generate signals for controlling the saddle front / rear feed device 25 and the vertical feed device 35.

  The operation panel 44 is a device for an operator to input various settings and instructions for machining, and is provided, for example, on the side of the grinding device 1. The operation panel is provided with a switch for switching ON / OFF of various functions, a switch for switching various automatic controls and manual operations, a dial for adjusting a feed amount or a cutting amount during grinding, and the like.

  The table left / right feeding device 50 moves the table 10 in the X direction based on a signal from the control device 40. Details of the table left-right feeding device 50 will be described later.

  The saddle back-and-forth feed device 25 is a device that moves the saddle 20 in the Z direction, and includes, for example, a ball screw mechanism and a servo motor. The saddle back-and-forth feed device 25 drives the servo motor and the like based on a signal from the control device 40 to move the wheel head 32 by a predetermined amount.

The wheel vertical feed device 35 is a feed device that moves the wheel head 32 (see FIG. 1) in the Y direction, and includes a ball screw mechanism, a servo motor, and the like. The wheel vertical feed device 35 drives the servo motor or the like based on the input from the control device 40 to move the wheel head 32 by a predetermined amount.
Note that the saddle longitudinal feed device 25 and the wheel vertical feed device 35 are not limited to the above-described example, and other known driving methods can be employed.

  The wheel drive device 36 is a device that rotates the grinding wheel 30 (see FIG. 1), and includes a motor and the like. The wheel drive device 36 rotates the grinding wheel 30 at a predetermined rotation speed based on a signal from the control device 40.

  FIG. 3 is a front view of the table 10 and the saddle 20 of the grinding apparatus 1. As shown in FIG. 3, the rail 11 has a substantially rod shape and extends in the moving direction of the table 10, that is, in the X direction. The dog 12 is slidably attached to the rail 11. Therefore, the dog 12 can be moved in the X direction by sliding the dog 12 with respect to the rail 11.

  The grinding apparatus 1 has three dogs 12. Specifically, the dog 12a designates a position where the table 10 is stopped. The dog 12a is used, for example, for setting the origin position of the table 10 or positioning the table 10 during dressing. By adjusting the movement of the dog 12a, the setting of the position to stop the table can be easily changed.

  Further, the dog 12b and the dog 12c designate positions where the table 10 is reversed when the workpiece W (see FIG. 1) is ground by automatic operation. The setting of the reciprocating range of the table 10 can be easily changed by adjusting the attachment positions of the dog 12b and the dog 12c.

  A dog detector 21 is provided above the saddle 20 and below the rail 11. The dog detector 21 detects the dog 12 fixed to the rail 11 and outputs the detection result to the control device 40. The control device 40 controls the feed of the table 10 based on information from the dog detector 21.

  4 is a cross-sectional view of the dog 12 taken along line AA shown in FIG. Dogs 12a, 12b, and 12c have substantially the same structure. As shown in FIG. 4, the dog 12 is formed with a mounting groove extending in the X direction with a substantially U-shaped cross section, and the rail 11 is inserted into the mounting groove. That is, the dog 12a is attached so as to sandwich the rail 11 fixed to the table 10 from above and below. The opening width of the mounting groove on the table 10 side, that is, the Y-direction dimension of the opening is formed smaller than the Y-direction dimension of the rail 11. As a result, the dog 12 does not fall off the rail 11 and slides easily in the X direction.

  The dog 12 is provided with a set screw 18 for fixing the position of the dog 12. The set screw 18 is provided on the front side of the dog 12 that is opposite to the table 10. By tightening the set screw 18, the tip of the set screw 18 comes into contact with the rail 11, whereby the dog 12 can be fixed at an arbitrary position.

Next, an example of stopping or reversing the movement of the table 10 by automatic operation will be described in detail with reference to FIGS.
5 (A) and 5 (B) are front views of the table 10, and FIG. 5 (A) shows a stop preparation position when the table 10 moves from left to right, and FIG. 5 (b). Indicates a stop position.

  As shown in FIG. 5A, a deceleration instruction unit 13 and a stop instruction unit 14 are formed in the lower portion of the dog 12. Specifically, the lower part of the dog 12 protrudes downward so that it can be detected by the dog detector 21. Among the protruding portions, when the table 10 moves and the dog 12 approaches the dog detector 21, the portion that is first detected by the dog detector 21 is the deceleration instruction unit 13. Further, the portion where the table further moves and the dog 12 cannot be detected by the dog detector 21 is the stop instruction unit 14.

  First, the table 10 is moving at a feed rate during grinding. Specifically, the moving speed of the table 10 is 0.1 m / min to 20 m / min. As the table 10 moves, the dog 12 fixed to the table 10 also moves together with the table 10 and approaches the dog detector 21.

  When the dog 12 approaches, the dog detector 21 first detects the deceleration instruction unit 13 of the dog 12 passing above. The control device 40 (see FIG. 2) decelerates the table 10 to a predetermined stop preparation speed when the dog detector 21 detects the deceleration instruction unit 13. The table 10 continues to move at the stop preparation speed while the dog detector 21 detects the dog 12.

  Here, the stop preparation speed is preferably a speed close to the minimum speed that can be set as the moving speed of the table 10. Specifically, the stop preparation speed is 0.1 m / min to 1.0 m / min, preferably 0.2 m / min to 0.7 m / min, and more preferably 0.3 m / min to 0.5 m / min. Minutes.

  If the moving speed of the table 10 is too high, for example, if the moving speed is faster than 1.0 m / min, the belt 58 (see FIG. 6) is likely to be stretched or slack, and the accuracy of the stop position of the table 10 is improved. It will decline.

  On the other hand, if the moving speed of the table 10 is too slow, it takes time to reverse or stop the table 10 and the processing time becomes long, and the productivity is lowered. Further, when the moving speed is slower than 0.1 m / min, there is a possibility that problems such as knocking of the motor 51 (see FIG. 6) may occur.

  By appropriately setting the stop preparation speed as described above, highly accurate position control can be realized while suppressing problems such as a decrease in productivity and knocking due to a long machining time.

  As shown in FIG. 5B, when the table 10 further moves and the stop instruction unit 14 approaches the dog detector 21, the dog detector 21 detects the stop instruction unit 14. Specifically, the dog detector 21 cannot detect the presence of the dog 12.

  The control device 40 (see FIG. 2) stops or reverses the movement of the table 10 when the stop instruction unit 14 is detected by the dog detector 21. In this way, by detecting one dog 12, it is possible to execute control for decelerating the table 10 and control for stopping or reversing, and it is possible to perform highly accurate position control with a small number of parts. . In addition, it is easy to set the stop and reverse positions.

  As described above, the inertial force at the time of stopping or reversing is reduced by stopping or reversing the movement of the table 10 after setting the moving speed of the table 10 to a predetermined stop preparation speed, and the belt 58 (see FIG. 6). Thus, it is possible to prevent the table 10 from going too far. As a result, the accuracy of the stop or reverse position is increased. Specifically, according to the present invention, the error of the table stop or reversal position, which was about 1 to 15 mm in the prior art, can be reduced to about 0.15 mm.

  Thereby, the error of the dimension of the workpiece | work W (refer FIG. 1) to be ground can be made small. Further, by decelerating the table 10 and then stopping it, the dressing of the grinding wheel 30 (see FIG. 1) is accurately aligned with the position of the grinding wheel 30 and the dressing device 17 (see FIG. 1). be able to. Thereby, the precision of the dressing process of the grinding wheel 30 can be improved.

  Further, it is only necessary to decelerate to a predetermined stop preparation speed immediately before the movement of the table 10 stops or reverses, so that it is not necessary to slow down the moving speed of the table 10 during grinding. Therefore, the accuracy of the stop position of the table 10 can be increased without reducing the efficiency of the grinding operation.

  Further, since the movement of the table 10 is stopped or reversed based on the information of the dog 12 that is fixed to the table 10 so as to be adjustable in position, the table 10 can be accurately detected without detecting the rotation angle of the motor 51 (see FIG. 6). It is possible to control the position. Therefore, for example, even when the motor 51 is disconnected from the drive system such as the belt 58 when manual feeding is performed and then connected again, the table 10 is based on the detection information of the dog 12 by the dog detector 21. The position of can be accurately grasped.

Next, the table left-right feeding device 50 will be described in detail with reference to FIGS.
6A and 6B are schematic views of the table left-right feeding device 50, and FIG. 6A shows a state in which the table 10 (see FIG. 1) is automatically fed by the power of the motor 51. FIG. 6B shows a state in which the table 10 is manually fed by an input from the left / right feed handle 15.

  As shown in FIGS. 6A and 6B, the table left-right feeding device 50 has a rotating shaft 52 extending in the Z direction. A pulley 53 is attached to the rotating shaft 52. A belt 58 connected to the table 10 is wound around the pulley 53 so that power can be transmitted.

  The belt 58 is stretched on the table 10 along the X direction. Specifically, one end of the belt 58 is fixed in the vicinity of one end in the left-right direction of the table 10, for example, in the vicinity of the right end, and the other end of the belt 58 is in the vicinity of the other end of the table 10, For example, it is fixed near the left end.

  As the rotary shaft 52 rotates, the belt 58 on one side is wound around the pulley 53, the belt 58 on the other side is rewound, and the table 10 moves to the other side. On the contrary, by reversing the rotating shaft 52, the belt 58 on the other side is wound around the pulley 53, the belt 58 on the one side is rewound, and the table 10 moves to one side. Thus, by changing the rotation direction of the rotating shaft 52, the feed direction of the table 10 can be changed, and the table 10 can be moved in the left-right direction.

  The table left-right feeding device 50 has a motor 51 for automatically moving the table 10. The motor 51 is provided behind the grinding apparatus 1, that is, on the rear end side of the rotating shaft 52. The motor 51 is, for example, an AC servo motor or the like, and the rotation speed, the rotation direction, and the like are controlled by the control device 40.

  A left and right feed handle 15 for manually feeding the table 10 is provided on the front end side of the rotary shaft 52 opposite to the motor 51. Here, the rotating shaft of the left and right feed handle 15 and the rotating shaft of the motor 51 are arranged on the same axis as the rotating shaft 52 of the pulley 53.

  The table left-right feeding device 50 includes a clutch 54 as a first clutch that connects the rotation shaft of the left-right feeding handle 15 and the rotation shaft 52 of the pulley 53 in an intermittent manner. Specifically, the driving portion 54 a of the clutch 54 is connected to the rotating shaft of the left and right feed handle 15, and the driven portion 54 b is connected to the rotating shaft 52.

  As shown in FIG. 6B, when the driving portion 54a of the clutch 54 is engaged with the driven portion 54b, the rotating shaft of the left / right feed handle 15 and the rotating shaft 52 of the pulley 53 are connected so as to transmit power. By turning the left / right feed handle 15 in this state, the table 10 (see FIG. 1) can be fed in the X direction.

  The table left-right feeding device 50 includes a clutch 55 as a second clutch that connects the rotation shaft of the motor 51 and the rotation shaft 52 of the pulley 53 so as to be intermittently connected. Specifically, the driving portion 55 a of the clutch 55 is connected to the rotating shaft of the motor 51, and the driven portion 54 b is connected to the rotating shaft 52.

  As shown in FIG. 6A, when the driving portion 54a of the clutch 54 is engaged with the driven portion 54b, the rotating shaft of the motor 51 and the rotating shaft 52 of the pulley 53 are connected so as to be able to transmit power. When the motor 51 is driven in this state, the table 10 moves in the X direction.

  Further, the table left / right feeding device 50 includes an air cylinder 56 as a driving means for connecting and disconnecting the clutch 54 and the clutch 55. The air cylinder 56 is provided between the left and right feed handle 15 and the clutch 54, and presses the driving portion 54a of the clutch 54 rearward so as to mesh with the driven portion 54b.

  A connecting shaft 57 is provided between the driving portion 54 a of the clutch 54 and the driving portion 55 a of the clutch 55 for interlocking the intermittent operation of the clutch 54 and the clutch 55. The connecting shaft 57 is provided coaxially with the rotating shaft 52 inside the rotating shaft 52, and both end portions of the connecting shaft 57 are in contact with the driving portion 54a and the driving portion 55a in a freely rotatable manner.

  6B, when the driving portion 54a of the clutch 54 is pressed by the air cylinder 56 and meshed with the driven portion 54b, the driving portion 55a of the clutch 55 is also pushed backward via the connecting shaft 57. . Accordingly, the driving portion 55a and the driven portion 55b of the clutch 55 are separated from each other, and the rotating shaft of the motor 51 and the rotating shaft 52 of the pulley 53 are disconnected.

  That is, during manual operation in which the rotation shaft of the left and right feed handle 15 and the rotation shaft 52 of the pulley 53 are connected by the clutch 54, the clutch 55 is disconnected and the rotation shaft of the motor 51 is disconnected from the rotation shaft 52 of the pulley 53. As a result, the motor 51 is not carried around during manual operation, and the manual feed operability is improved.

  Further, the table left-right feeding device 50 includes a spring 59 as a driving means for connecting and disconnecting the clutch 54 and the clutch 55. The spring 59 is provided between the motor 51 and the clutch 55 and presses forward so that the driving portion 55a of the clutch 55 is engaged with the driven portion 55b.

  In a state where the working air is not supplied to the air cylinder 56 and the air cylinder 56 does not press the driving portion 54a of the clutch 54, the driving portion of the clutch 55 pressed by the spring 59 as shown in FIG. 55a moves forward and meshes with the driven portion 55b. Thereby, the rotating shaft of the motor 51 and the rotating shaft 52 of the pulley 53 are connected, and the table 10 using the power of the motor 51 can be automatically fed.

  At this time, the restoring force of the spring 59 also acts on the driving portion 55a of the clutch 54 from the driving portion 55a of the clutch 55 via the connecting shaft 57, and the driving portion 55a is also pushed forward. As a result, the driving portion 54a of the clutch 54 moves forward and is separated from the driven portion 54b, and the engagement of the clutch 54 is released.

  As described above, the clutch 54 and the clutch 55 are interlocked so that when one is in a connected state, the other is in a disconnected state. Thereby, switching with an automatic driving | operation and a manual driving | operation can be reliably performed by easy operation. In addition, both the clutch 54 and the clutch 55 can be connected / disconnected at the same time by the air cylinder 56 which is a common drive device, and the device can be simplified.

  FIG. 7 is a diagram showing an air circuit 60 for operating the clutches 54 and 55. As shown in FIG. 7, the grinding apparatus 1 sequentially passes a pressure controller 62, an electromagnetic control valve 63, and a flow rate adjustment valve 65 from a compressed air supply source 61 as a circuit for supplying compressed air that drives the air cylinder 56. And an air circuit 60 connected to the air cylinder 56.

  The compressed air supplied from the compressed air supply source 61 passes through the drained filter of the pressure controller 62, is reduced to a predetermined pressure by the pressure reducing valve, and is supplied to the electromagnetic control valve 63. In order to operate the air cylinder 56 suitably, the pressure of the air supplied after being depressurized by the pressure controller 62 is preferably 0.2 MPa to 0.22 MPa.

  When the air cylinder 56 is driven, the electromagnetic control valve 63 is operated by a signal from the control device 40 (see FIG. 2), the air path is switched, and the air reduced in pressure by the pressure controller 62 It passes through and is supplied to the air cylinder 56 via the flow rate adjustment valve 65. In addition, control of the electromagnetic control valve 63 by the control apparatus 40 is performed when an operator switches the changeover switch 41 (refer FIG. 2).

  When air is supplied to the air cylinder 56, the piston provided in the air cylinder 56 is pushed out. Thereby, as shown in FIG. 6B, the air cylinder 56 pushes the driving portion 54a of the clutch 54 rearward, and the driving portion 54a and the driven portion 54b are engaged with each other. Along with this, the driving portion 55a of the clutch 55 is also pushed backward, and the driving portion 55a and the driven portion 55b are separated from each other. Thereby, the table left-right feeding device 50 is switched to the manual feeding state.

  When switching from manual feed to automatic feed, the electromagnetic control valve 63 shown in FIG. Then, the air from the compressed air supply source 61 is not supplied to the air cylinder 56. Then, the working space of the air cylinder 56 is opened.

  As a result, the pressing force by the air cylinder 56 disappears, and the piston of the air cylinder 56 is pushed by the restoring force of the spring 59 of the table left-right feeding device 50 (see FIG. 6), and is supplied into the working space of the air cylinder 56. The air is discharged to the outside via a silencer 64 connected to the electromagnetic control valve 63.

  Accordingly, as shown in FIG. 6 (A), the driving portion 55a of the clutch 55 and the driving portion 54a of the clutch 54 are pushed back by the spring 59, and the clutch 55 is engaged to be in a connected state. Is switched to the disconnected state. That is, the table left / right feeding device 50 is switched to the automatic feeding state.

  As described above, according to the grinding apparatus 1 according to the present embodiment, high-precision automatic feeding using the power of the motor 51 and manual feeding excellent in operability by the wire driving method or the belt driving method are realized. Is done. Further, by operating the changeover switch 41, the clutch 54 and the clutch 55 are intermittently connected by an air cylinder 56 using air pressure, and automatic feeding by the motor 51 and manual feeding by input from the left and right feeding handle 15 are easy. You can switch to

  In addition, this invention is not limited to the said embodiment, In addition, a various change implementation is possible in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 Grinding device 10 Table 11 Rail 12 Dog 13 Deceleration instruction | indication part 14 Stop instruction | indication part 15 Left-right feed handle 20 Saddle 21 Dog detector 30 Grinding wheel 40 Control device 41 Changeover switch 50 Table left-right feed device 51 Motor 52 Rotating shaft 53 Pulley 54 Clutch 55 Clutch 56 Air cylinder 58 Belt 59 Spring 60 Air circuit

Claims (7)

Grinding wheel to grind workpiece,
A table that supports the workpiece and is driven by a wire or a belt to move in a horizontal direction;
A motor for moving the table via the wire or the belt;
A controller for controlling the motor to control the movement of the table,
The control device stops or reverses the movement of the table after setting the moving speed of the table to a predetermined stop preparation speed. A dog that is fixed to the table so that its position is adjustable and moves together with the table;
Detecting means attached to a saddle that movably supports the table and detecting the dog;
2. The control device according to claim 1, wherein the control device decelerates the table to the stop preparation speed based on information on the dog detected by the detection unit, and stops or reverses the movement of the table. Grinding equipment. The dog is formed with a deceleration instruction section and a stop instruction section,
The control device decelerates the table to the stop preparation speed when the deceleration instruction is detected by the detection means, and stops or reverses the movement of the table when the stop instruction is detected by the detection means. The grinding apparatus according to claim 2.   The grinding apparatus according to any one of claims 1 to 3, wherein the stop preparation speed is 0.1 m / min to 1.0 m / min. A feed handle for manually moving the table via the wire or the belt;
5. The automatic feed for moving the table by the power of the motor and the manual feed for moving the table by the power input from the feed handle can be switched. The grinding apparatus of any one of Claims. A pulley around which the wire or the belt is wound to transmit power;
A first clutch that connects the rotating shaft of the feed handle and the rotating shaft of the pulley in an intermittent manner;
A second clutch that connects the rotating shaft of the motor and the rotating shaft of the pulley in an intermittent manner;
The grinding apparatus according to claim 5, further comprising: The grinding apparatus according to claim 6, wherein the first clutch and the second clutch are interlocked so that when one is in a connected state, the other is in a disconnected state.

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