JPH06246628A - Automatic grinding wheel changing device of surface grinding machine - Google Patents

Abstract

PURPOSE:To execute the automatic change of a grinding wheel by placing grinding units on each loading table loaded on a movable table, moving the desired movable table together with the loading table and the grinding unit to the right below a vertical grinding wheel shaft by a magazine dividing device, and elevating an elevating table. CONSTITUTION:When a grinding unit is mounted on a vertical grinding wheel shaft, the head of the vertical grinding wheel shaft is first moved to the right, and stopped right below an elevating table 10. When the grinding unit to be mounted is then selected, a carrying table 19 is moved by a magazine dividing device 13 to the position corresponding to a movable body 14 where this unit is loaded, and after the movable table 14 is pushed forward on this carrying table 19 b a cylinder 20, the carrying the table 19 is moved right below the vertical grinding wheel shaft. Then, a grinding wheel elevating device 11 is driven, and the elevating table 10 is elevated to push up the loading table 50 on the movable table 14 to the position of the specified height. When this push-up is detected by a sensor through a sensor shaft, a grinding wheel attaching/detaching device and a cover attaching/detaching device are driven, and the grinding wheel of the grinding unit is automatically fixed to the grinding wheel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grindstone automatic exchanging device for a surface grinder.

[0002]

2. Description of the Related Art In a surface grinder, a plurality of grindstones are used depending on the shape of a work or a change in grinding position, but it is extremely difficult to manually attach and remove the grindstone and the grindstone cover.
In a large surface grinder, the grindstone also becomes large, so graining work is required, and a large-scale installation device is required, and the grindstone and the grindstone cover cannot be quickly replaced. Along with this, handling mistakes also occur, causing problems such as damaging the grindstone and impairing the safety of the operator.

Further, a magazine in which a plurality of grindstones are mounted is provided above the surface grinder, a grindstone cover for covering the end of the grindstone shaft is opened and closed, and the grindstone taken out from the magazine by power is mounted on the grindstone shaft. There is something I did. However, since the grindstone cover is common even if the grindstone is replaced, the degree of freedom for performing the grinding process by arbitrarily changing the direction of the grindstone applied to the work is limited.

From the above, Japanese Patent Laid-Open No. 61-148
As described in Japanese Patent Publication No. 31-31, a plurality of grindstones and a grindstone cover are individually mounted in a rotary magazine, and the selected grindstone and grindstone cover are lifted by a vertical movement device to move the grindstone to a vertical grindstone shaft. The invention has been made in such a manner that the grindstone cover is mounted on the wheel and then the grindstone cover is moved in the horizontal direction to cover the grindstone and the grindstone cover is fixed.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The invention described in Japanese Unexamined Patent Publication No. 1 requires a drive means for moving the grindstone cover to a regular mounting position after the grindstone is mounted on the vertical grindstone shaft, and thus has a problem that the structure becomes complicated.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a grindstone unit in which a grindstone is surrounded by a grindstone cover having an opening in the center of the upper surface and a part of the side surface, and a grindstone attaching / detaching device for detachably holding the center of the grindstone. A vertical grindstone shaft having, a cover attaching / detaching device fixedly held around the vertical grindstone shaft to detachably hold the grindstone cover, a magazine in which a plurality of movable bases are movably arranged, and A magazine indexing device that delivers the movable table directly below the vertical grindstone shaft, a lower lid that is displaceably held in the center of the lower surface of the grindstone cover along the axial direction of the grindstone, and a lower surface of the grindstone cover. A plurality of mounting bases mounted on the upper surface of each of the movable bases, each having a support portion facing the peripheral portion and a pressing portion that presses the lower lid, and located immediately below the vertical grindstone shaft. Elevating table extended below the table It was constituted by a grinding wheel lifting device for vertically driven.

[0007]

[Operation] A grindstone unit is placed on each of the mounting tables mounted on the movable table, and the desired movable table together with the mounting table and the grindstone unit is moved directly below the vertical grinding wheel axis by the magazine indexing device to move the lifting table of the grindstone lifting device. By raising, the center of the grindstone can be attached to the vertical grindstone shaft by the grindstone attaching / detaching device, and the grindstone cover can be fixed by the cover attaching / detaching device. Even when the grindstone cover and the grindstone can move relative to each other, in the process of raising the elevating table once, one supporting part of one mounting table pushes the grindstone cover to a fixed position and the other The pressing portion can push the center of the grindstone up to a fixed position via the lower lid.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The main configuration of the present invention, which will be described in detail later, a surface grinder having a vertical grindstone shaft, a grindstone unit in which a grindstone and a grindstone cover are paired, and a plurality of grindstone units are mounted vertically and horizontally. A magazine, a magazine indexing device that moves this magazine in a horizontal plane to position the selected grindstone unit at a position directly below the vertical grindstone axis, a grindstone lifting device that moves the indexed grindstone unit up and down, and a grindstone unit A grindstone attaching / detaching device for attaching / detaching the grindstone to / from the vertical grindstone shaft, and a detachable device for attaching / detaching the grindstone cover to the periphery of the vertical grindstone shaft.

First, the entire structure of the surface grinder is shown in FIGS. 1 is a plan view, FIG. 2 is a right side view, and FIG. 3 is a front view. A table 1 for holding a work is provided so as to be reciprocally movable along a bed 2 which is long in the front-rear direction. On both sides of the bed 2, columns 4 whose upper ends are connected to a horizontally long top beam 3 are arranged opposite to each other. These columns 4
Is a drive mechanism (not shown) for moving the cross rail 5 up and down.
Have. The cross rail 5 is provided with a saddle 6 which is horizontally reciprocally driven and a saddle 7 which is vertically reciprocally driven in a vertical plane or in a turning direction. One of the saddles 6 is provided with a horizontal grindstone head 8 vertically. The other saddle 7 is movably installed.
A vertical grindstone shaft head 9 is provided on the shaft so as to be vertically movable or rotatable. A grindstone elevating device 11 for elevating the elevating table 10 is provided on the right front surface of the cross rail 5, and a magazine 12 and a magazine indexing device 13 are provided on the right side of the bed 2.

Next, as shown in FIGS. 4 and 5, the magazine 12 extends from the right side to a position directly below the vertical grinding wheel spindle head 9 and a plurality of movable bases 14 arranged at a plurality of standby positions. And a rail 16 that guides each of the movable bases 14 from the side toward the rail 15.

As shown in FIGS. 4 and 5, the magazine indexing device 13 is moved along the rail 16 by a feed screw 18 driven by a motor 17 capable of rotating in the forward and reverse directions and rotation of the feed screw 18. And a cylinder 20 to which each of the movable bases 14 is connected,
A rail 21 connected to an end of the rail 16 is provided on the upper surface of the carrier table 19. That is, the movable base 14 selected by driving the desired cylinder 20 is guided by the rail 16 and sent out to the rail 21 on the transport base 19. Although not shown, the moving operation of the movable base 14 is detected by a limit switch or a sensor, and the motor 17 is driven by the detection signal. As a result, the transfer table 19 moves together with the movable table 14 directly below the vertical grinding wheel spindle head 9, and the operation of each part is performed by sequence control.

As shown in FIG. 6, the grindstone lifting device 11
Is a feed screw 2 that is driven by a motor 22 that can rotate forward and backward.
3 and an elevating table 10 which is screwed to the feed screw 23 and is guided up and down by a column (not shown). Therefore, the structure is such that the elevator table 10 is raised or lowered by rotating the motor 22 in either direction.

As shown in FIG. 7, the vertical grindstone shaft head 9 is
Vertical grinding wheel shaft 24 rotatably held in an outer cylinder (described later)
Have. The vertical grindstone shaft 24 is driven by a motor 25 (see FIGS. 1 to 3). In FIG. 7, reference numeral 26 is a grindstone unit. The grindstone unit 26 includes a grindstone 27 and a grindstone cover 28 surrounding the grindstone 27. A circular opening 29 is formed on the upper surface of the grindstone cover 28, a laterally long window (not shown) for projecting only a part of the outer periphery of the grindstone 27 is formed on the side surface, and the ring 3 is formed at the center of the lower surface.
0 is fixed, and the grindstone cover 2 is provided inside the ring 30.
The lower lid 31 having higher rigidity than 8 is fitted so as to be vertically displaceable, but the inner circumference of the ring 30 and the outer circumference of the lower lid 31 are fitted with a labyrinth cross section,
The vertical displacement of the lower lid 31 is limited to a narrow range. Therefore, although the lower lid 31 is biased downward by the spring 32, it does not fall off from the ring 30. A seal 31 is provided between the ring 30 and the lower lid 31.
a is interposed. The center portion of the grindstone 27 is held by metal flanges 33 and 34, and the disk 35 fixed to the lower surface of the upper flange 34 has a center portion of the circular plate 35 at the upper end of which an expanding portion 3 is provided.
A shaft 37 having 6 is fixed.

In FIG. 7, the central portion of the grindstone 27 (the shaft 3
A grindstone attaching / detaching device 38 for detachably holding 7) is provided. The grindstone attaching / detaching device 38 is inserted into the vertical grindstone shaft 24 and moved up and down by a cylinder (not shown).
9 and a plurality of movable claws 40 that engage with the lower portion of the expanding portion 36 of the shaft 37 by the upward movement of the operating rod 39, which is a so-called collet chuck.

Further, the structure of the cover attaching / detaching device 41 will be described with reference to FIGS. 7 and 8. That is, 42
Is a fixed plate, and the fixed plate 42 is fixed to an outer cylinder 24a (see FIG. 8) that rotatably holds the vertical grindstone shaft 24. The lower surface of the fixed plate 42 has a cylinder 43 and a support shaft 44. A pair of left and right arms 45 rotatably held are provided. One end of each arm 45 is rotatably connected to a piston 46 protruding from both ends of the cylinder 43 by a support shaft 47, and a locking claw 48 is fixed to the other end of the arm 45. Two mounting members 49 are fixed to the grindstone cover 28. These locking claws 48 enter the lower side of the mounting member 49 and engage with each other, and the engaging surfaces of both are formed with inclined surfaces 49a that abut in a wedge shape.

Further, as shown in FIG.
0 is a seat 10 which is elastically moved up and down by a spring 10a.
There is provided a mounting table 50 which has b and is pushed up to the seat 10b. This mounting table 50 is provided with the grindstone cover 2
8 includes a pressing portion 51 that supports the lower lid 31 and a supporting portion 52 that radially protrudes from the periphery of the pressing portion 51 and supports the peripheral portion of the grindstone cover 28. An adjusting screw 53 for adjusting the amount of push-up of 28 is screwed.

At the center of the pressing portion 51, a sensor shaft 54 which is inserted into a small hole formed in the center of the lower lid 31 and presses the central portion (disk 35) of the grindstone 27 is urged upward. A shaft 55, which is slidably fitted and interlocked with the lowering operation of the sensor shaft 54, is vertically movably passed through the elevating table 10. In addition, FIG. 9 shows the mounting table 5 mounted on the lifting table 10.
0 is a plan view, and FIG. 10 is a plan view of the lift 10.

In such a construction, since the grindstone 27 and the grindstone cover 28 differ depending on the purpose of processing, a plurality of grindstone units 26 are prepared when processing a kind of work. As shown in FIG. 5, these grindstone units 26 are mounted on the mounting bases 50 mounted on the movable bases 14, respectively.

Here, the grindstone unit 26 is attached to the vertical grindstone shaft 24.
The operation when mounting is described. First, the vertical grindstone shaft head 9 is driven to the right along the cross rail 5, and the lift 1
Stopped just above 0. When the grindstone unit 26 to be mounted is selected, the carrier table 19 is moved to a position corresponding to the movable table 14 on which the grindstone unit 26 is mounted. This movement is performed by rotating the feed screw 18 in the forward or reverse direction with the motor 17. The selected movable base 14 is pushed out onto the carrier 19 by the cylinder 20, and then the carrier 19 is directly below the vertical grinding wheel shaft 24 by the motor 17, that is, as shown in FIG. It is moved until it is located right above the lift 10.

Although not shown, the moving operation of the carrier table 19 is detected by a limit switch or a sensor, and the motor 22 of the grindstone lifting device 11 is driven in the normal direction by the detection signal, and the lift table 10 is rotated by the feed screw 23. To rise. As a result, the mounting table 50 on the movable table 14 is moved to the lift table 1
Pushed up by 0. In the ascending process of the mounting table 50 at this time, as shown in FIG. 7, the central portion (disk 35) of the grindstone 27 is pressed by the pressing portion 5 of the mounting table 50 via the lower lid 31.
The pressure of 1 is pressed against the vertical grindstone shaft 24, and the grindstone cover 28 is pushed up by the supporting portion 52 of the mounting table 50. The lift 10 still rises, but the spring 10a
Is compressed and the seat 10b itself supporting the mounting table 50 does not rise further. In this ascending process, the sensor shaft 54 has its upper end abutted on the shaft 37 before the disk 35 abuts the lower end of the vertical grindstone shaft 24, so that the disk 35 further abuts the lower end of the vertical grindstone shaft 24. When it rises, the sensor shaft 54 lowers relatively and pushes the shaft 55 downward.
The grindstone attaching / detaching device 38 and the cover attaching / detaching device 41 are driven by a detection signal from a limit switch or a sensor for detecting the descending operation of the shaft 55.

That is, on the other hand, the operating rod 39 of the grindstone attaching / detaching device 38 is pulled up by the cylinder, and the movable claw 40 is moved.
Follows the movement of the operating rod 39 and tightens the shaft 37 of the grindstone 27. On the other hand, the cylinder 43 of the cover attaching / detaching device 41
Is driven and the left and right pistons 46 are retracted. As a result, the left and right arms 45 are rotated around the support shaft 44, and the locking claws 48 pull up the mounting member 49 together with the grindstone cover 28. As a result, the grindstone 27 is fixed to the vertical grindstone shaft 24, and the grindstone cover 28 is fixed to the fixed plate 42. After that, the elevating table 10 is driven downward, and with this, the mounting table 50 is lowered and separated from the grindstone unit 26. Therefore, the lower lid 31 is separated from the central portion (disk 35) of the grindstone 27 by the urging force of the spring 32. After this, the grinding operation is started.

When the grindstone unit 26 is removed, the vertical grindstone shaft head 9 is moved right above the lift 10 and then the lift 10 is moved.
Is raised together with the mounting table 50, and the cylinder of the grindstone attaching / detaching device 38 and the cylinder 43 of the cover attaching / detaching device 41 are driven in the opposite direction, whereby the grindstone 27 is released from the vertical grindstone shaft 24, and the grindstone cover 28 fixes the fixing plate 42. The grindstone unit 26 is supported by the mounting table 50 on the elevating table 10. Therefore, the vacant movable table 14 is attached to the vertical grindstone shaft 24.
The grindstone unit 26 and the mounting table 5 that supports the grindstone unit 26 are lowered by lowering the elevating table 10 in a state of being positioned directly below the table.
0 is received by the movable base 14.

[0023]

As described above, the present invention has a magazine in which a plurality of movable bases are movably arranged, and a magazine indexing device for delivering the selected movable bases directly below the vertical grinding wheel shaft.
A movable base having a lower lid held in the center of the lower surface of the grindstone cover so as to be displaceable along the axial direction of the grindstone, a support portion facing the peripheral portion of the lower surface of the grindstone cover, and a pressing portion for pressing the lower lid. Since a plurality of mounting bases mounted on the respective upper surfaces of the above and a grindstone lifting device for vertically driving the lifting base extending below the mounting base located directly below the vertical grinding wheel shaft are provided, By mounting the grindstone unit on each of the mounting tables placed on the table, move the desired movable table together with the mounting table and the whetstone unit directly below the vertical grindstone axis with the magazine indexing device, and raise the lifting table of the whetstone lifting device. , The center of the grindstone can be attached to the vertical grindstone shaft by the grindstone attaching / detaching device and the grindstone cover can be fixed by the cover attaching / detaching device, and the grindstone cover and the grindstone can move relative to each other. hand , The lifting platform in the process of raising one time,
One support part of one mounting table can push the grindstone cover to a fixed position and the other pressing part can push the center part of the grindstone to a fixed position via the lower lid. The structure for moving to can be simplified.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a right side view.

FIG. 3 is a front view.

FIG. 4 is a plan view of a magazine and a whetstone lifting device.

FIG. 5 is a side view of the magazine.

FIG. 6 is a side view of the grindstone lifting device.

FIG. 7 is a vertical sectional side view of a vertical grindstone shaft, a grindstone unit, a mounting table, and an elevating table.

FIG. 8 is a bottom view of the fixing plate to which the cover attaching / detaching device is attached.

FIG. 9 is a plan view showing a mounting table on an elevating table.

FIG. 10 is a plan view of the lifting table.

[Explanation of symbols]

 10 Lifting Platform 11 Grinding Stone Lifting Device 12 Magazine 13 Magazine Indexing Device 24 Vertical Grinding Stone Shaft 26 Grinding Stone Unit 27 Grinding Stone 28 Grinding Stone Cover 31 Lower Lid 38 Grinding Stone Attaching / Detaching Device 41 Cover Attaching / Detaching Device 50 Placing Platform 51 Pressing Unit 52 Supporting Section

Claims (1)

[Claims] 1. A grindstone unit in which a grindstone is surrounded by a grindstone cover having an opening in the center of the upper surface and a part of the side surface, and a vertical grindstone shaft having a grindstone attaching / detaching device for detachably holding the center of the grindstone. A cover attaching / detaching device that is fixedly held around the vertical grindstone shaft and detachably holds the grindstone cover, a magazine in which a plurality of movable bases are movably arranged, and the selected movable base is the vertical grindstone. A magazine indexing device for delivering directly below the shaft, a lower lid that is displaceably held along the axial direction of the grindstone and is held in the center of the lower surface of the grindstone cover, and a support portion that faces the peripheral portion of the lower surface of the grindstone cover. A plurality of mounting bases mounted on the upper surface of each of the movable bases having a pressing portion that presses the lower lid, and extended below the mounting base located directly below the vertical grinding wheel shaft. Grinding stone ascending / descending the lifting platform A grindstone automatic exchanging device for a surface grinder characterized by comprising a descending device.