JP2010194690A - Double-head grinder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double-head grinder capable of preventing a dresser from interfering with guide rails, and achieved in the easy and short dressing operation of grinding surfaces of rotary grinding wheels. <P>SOLUTION: A workpiece W is ground by the grinding surfaces 11a of a pair of rotary grinding wheels 11 by continuously guiding and feeding the workpiece W through a pair of parallel guide rails 13 between the opposed grinding surfaces 11a of the rotary grinding wheels 11 oppositely disposed on the same axis. A dressing mechanism 15 for dressing the grinding surfaces 11a of the rotary grinding wheels 11 is disposed in the vicinity of the periphery of these rotary grinding wheels 11. Switching mechanisms 19 for disposing the guide rails 13 so as to be switchable between an operating position to guide the workpiece W between the grinding surfaces 11a of the rotary grinding wheels 11, and a retracted position free from interference with an operating region of the dresser 16 of the dressing mechanism 15 are disposed at both ends of the guide rails 13, respectively. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  According to the present invention, a plurality of workpieces are transferred while being continuously guided through a pair of guide rails between opposed grinding surfaces of a pair of rotating grindstones arranged in an opposing state on the same axis. The present invention relates to a double-headed grinding machine in which both sides of a workpiece are ground on the grinding surface.

  In this type of double-headed grinding machine, if a large number of workpieces are continuously ground, there is a risk that the workpiece grinding accuracy may be reduced due to wear of the grinding surface of the rotating grindstone. In order to cope with such a problem, a dressing mechanism is arranged near the outer periphery of the rotating grindstone, and the dresser of the dressing mechanism is moved between the grinding surfaces of both rotating grindstones, and the grinding surface of both rotating grindstones is moved by the dresser. Conventionally, a dressing configuration has been proposed.

  As a conventional double-head grinding machine, for example, a configuration as disclosed in Patent Document 1 has been proposed. In this conventional configuration, a pair of adjustment mechanisms for adjusting the distance between the two guide rails according to the size of the workpiece are provided at both ends of the guide rails on both sides of the rotating grindstone. Each adjustment mechanism is screwed into the adjustment screw having a pair of screw parts with different spiral directions, a motor for rotating the adjustment screw, and the screw part of the adjustment screw, and connected to the end of each guide rail. And a pair of adjusting nuts. Then, by rotating the adjusting screw, the pair of adjusting nuts are moved closer to or away from each other, and the distance between the two guide rails is adjusted.

Utility Model Registration No. 2544376

However, the conventional double-head grinding machine described above has the following problems.
That is, in the conventional configuration provided with the dressing mechanism, since the pair of guide rails are arranged in parallel with a space between the rotating wheels, the dresser enters and moves between the grinding surfaces of both rotating wheels. When dressing is performed, the dresser interferes with the guide rail. For this reason, it is necessary to perform dressing work for the rotating grindstone after removing the guide rail disposed at least on the side where the dresser enters from between the rotating grindstones, which is troublesome and takes time.

  Further, in the conventional configuration described in Patent Document 1, the distance between the two guide rails can be adjusted according to the size of the workpiece by the adjusting mechanism, but the guide rails are retracted to the outside from between the rotating grindstones. I can't. Therefore, in the conventional configuration described in Patent Document 1, when the dressing mechanism is arranged in the vicinity of the outer periphery of the rotating grindstone and the grinding surface of both rotating grindstones is configured to be dressed, as in the case of the conventional configuration, The dresser interferes with the guide rail. Therefore, the troublesome work of removing the guide rail is necessary.

  The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a double-headed grinding machine that can suppress the possibility of the dresser interfering with the guide rail and can perform the dressing operation of the grinding surface of the rotating grindstone easily and in a short time.

  In order to achieve the above-mentioned object, the present invention provides a pair of rotating grindstones arranged on the same axis so as to face each other and grinding the workpiece on the facing grinding surfaces, and an interval between the rotating grindstones. And a pair of guide rails for guiding the workpiece so that the workpiece is passed between the grinding surfaces of the two rotating wheels, and a dressing mechanism for dressing the grinding surfaces of the two rotating wheels In the double-head grinding machine, the guide rail on the side corresponding to at least the dressing mechanism of the pair of guide rails, the working position for guiding the workpiece between the grinding surfaces of the two rotating grindstones, and the dressing mechanism It is characterized in that switching means is provided for switching to a retracted position that does not interfere with the operating area of the dresser.

  Therefore, in the present invention, when the workpiece is ground, the guide rail is switched to the operating position by the switching means. In this state, while the workpiece is guided between the guide rails, the workpiece is transferred between the facing grinding surfaces of the two rotating grindstones, and grinding is performed on both sides of the workpiece on the grinding surface. On the other hand, when dressing the grinding surfaces of both rotary grinding wheels, the guide rail is switched from the operating position to the retracted position by the switching means. In this state, the dresser of the dressing mechanism is moved between the grinding surfaces of the two rotating grindstones to dress the grinding surface. In this case, since the guide rail is disposed at the retracted position, it is possible to prevent the dresser from interfering with the guide rail. Therefore, unlike the conventional configuration, it is not necessary to perform the troublesome work of removing the guide rail from the position between the two rotating whetstones prior to the dressing work, and the dressing work can be performed easily and in a short time.

  In the above configuration, the switching means is disposed corresponding to both ends of the guide rail, and the guide rail is moved to the direction orthogonal to the extending direction so as to be switched between the operating position and the retracted position. Configure. In such a configuration, the guide rail can be switched between the operating position and the retracted position by moving the guide rail in a direction orthogonal to the extending direction with a small amount of movement.

  In the above configuration, the switching unit may be configured to also serve as an adjusting unit for adjusting the distance between the two guide rails by moving the two guide rails separately in a direction orthogonal to the extending direction. In such a configuration, it is not necessary to provide an adjusting means separately from the switching means, the structure can be simplified, and the distance between the guide rails can be easily adjusted according to the size of the workpiece. Can do.

  In the above-mentioned configuration, the switching means is orthogonal to the extending direction of the guide rail by the rotation of the motor provided corresponding to both ends of each guide rail, the feed screw rotated by the motor, and the rotation of the feed screw. It is good to comprise from the feed nut moved to a direction, and the connection means for connecting the feed nut to the edge part of a guide rail. In such a configuration, the structure of the switching means is simple, and the guide rail can be accurately moved and arranged at a predetermined position by the rotation of the motor.

  As described above, according to the present invention, the dresser can be prevented from interfering with the guide rail, and the effect that the dressing operation of the grinding surface of the rotating grindstone can be performed easily and in a short time is exhibited. .

The front view which shows the double-headed grinding machine of one Embodiment. The top view of the double-headed grinding machine of FIG. The principal part disassembled perspective view which expands and shows the switching mechanism of the guide rail in the double-headed grinding machine of FIG. The front view which shows the state by which the guide rail was switched and arrange | positioned to the retracted position in the double-headed grinding machine of FIG.

An embodiment of a double-head grinding machine embodying the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, in the double-head grinding machine of this embodiment, a pair of rotary grindstones 11 have their central axes arranged on the same axis, and the side grinding surfaces 11a are parallel to each other at a predetermined interval. It is installed so as to be able to rotate in a state of being opposed to. A pair of support mechanisms 12 are arranged on both sides of the rotating grindstone 11 (right and left sides in FIGS. 1 and 2). A pair of guide rails 13 (in the embodiment, a pair of upper and lower sides) are supported between the two support mechanisms 12 with an interval in the vertical direction, and extend in parallel in the horizontal direction through the grinding surfaces 11a of the rotary wheels 11. Has been. A pair of conveyors 14 for carrying a workpiece W such as a bearing race between the rotating grindstones 11 is disposed between the illustrated left end portions of both guide rails 13. Then, during the rotation of the rotating grindstone 11, the work W carried by the conveyor 14 is guided and moved between the guide rails 13 so as to pass between the grinding surfaces 11 a of the rotating grindstone 11. The grinding surface 11a is used to grind both side surfaces of the workpiece W.

  As shown in FIG. 1, a dressing mechanism 15 is disposed between the support mechanisms 12 near the upper side of the outer periphery of the rotating grindstone 11. The dresser 16 of the dressing mechanism 15 is rotatably supported on a frame (not shown) by a support shaft 17 at a base end portion, and diamonds 18 project from both side portions of the tip end. Then, as shown in FIG. 4, the dresser 16 enters between the grinding surfaces 11 a of the both rotating whetstones 11 in the rotating state of the both rotating whetstones 11, and reciprocates between the outer peripheral edge position and the center position of the rotating whetstone 11. When rotating, the diamond 18 dresses the grinding surface 11 a of the rotary grindstone 11.

  As shown in FIGS. 1 to 3, the both support mechanisms 12 are provided with a switching mechanism 19 as switching means for switching and arranging the two guide rails 13 at two positions. Then, by the switching mechanism 19, both guide rails 13 are integrally moved in the vertical direction perpendicular to the extending direction, so that the guide rails 13 are ground on the rotary grindstone 11 as shown in FIG. 1. The operation position P1 for guiding the workpiece W between the surfaces 11a and the retracted position P2 that does not interfere with the operating region of the dresser 16 of the dressing mechanism 15 as shown in FIG.

  In this embodiment, the switching mechanism 19 is also used as an adjusting means for adjusting the distance between the two guide rails 13. Then, by the switching mechanism 19 that also serves as the adjusting means, the two guide rails 13 are moved individually in the vertical direction perpendicular to the extending direction at the operating position P1, so that both the two according to the size of the workpiece W. The distance between the guide rails 13 is adjusted.

Next, the configuration of the switching mechanism 19 will be described in detail.
As shown in FIGS. 1 to 3, a support plate 22 is attached to the front surface of the frame 21 of each support mechanism 12, and the support plate 22 has a pair of elongated holes extending in the vertical direction at different height positions. The guide groove 22a is formed. In the frame 21, a pair of motors 23 made of servomotors are disposed. Corresponding to each motor 23, a pair of feed screws 24 are supported in the frame 21 so as to be rotatable on an axis extending in the vertical direction perpendicular to the extending direction of the guide rail 13, and the upper ends of the feed screws 24. Are connected to the motor shaft of each motor 23.

  As shown in FIGS. 1 to 3, a feed nut 25 is screwed to each feed screw 24. On the front surface of each feed nut 25, a connecting screw 26 that constitutes a connecting means protrudes forward through a guide groove 22 a of the support plate 22. Each connecting screw 26 passes through a hole 27 a of the spacer 27 and is inserted into an insertion hole 28 on each guide rail 13. In this state, a nut 29 constituting a connecting means is screwed to the connecting screw 26.

  Then, when the feed screws 24 are synchronously rotated by the motors 23 of the switching mechanisms 19, the pair of guide rails 13 are integrally moved up and down via the feed nut 25, and the operating position shown in FIG. Switching between P1 and the retracted position P2 shown in FIG. In addition, the pair of feed screws 24 are individually rotated by the motor 23 while the guide rails 13 are arranged at the operation position P1, so that the pair of guide rails 13 are individually moved up and down via the feed nut 25. Thus, the distance between the guide rails 13 is adjusted.

Next, the operation of the double-headed grinding machine configured as described above will be described.
When the workpiece W is ground in this double-head grinding machine, the both guide rails 13 are moved to the action position P1 near the rotation center between the pair of rotating wheels 11 by the switching mechanism 19, as shown in FIG. Switching is arranged. In this state, both the rotating whetstones 11 are rotated, and a plurality of workpieces W are guided between the both guide rails 13 and moved so as to pass between the grinding surfaces 11 a of the rotating whetstone 11. As a result, grinding is continuously performed on both side surfaces of the plurality of workpieces W by the grinding surfaces 11 a of the both rotating grindstones 11.

  On the other hand, when dressing the grinding surface 11a of both the rotating grindstones 11, the both guide rails 13 are retracted below the center of rotation between the pair of rotating grindstones 11 by the switching mechanism 19, as shown in FIG. Switched to the retracted position P2. In this state, the rotating grindstone 11 is rotated, and the dresser 16 of the dressing mechanism 15 enters between the grinding surfaces 11a of the rotating grindstone 11, and reciprocates between the outer peripheral edge position and the center position of the rotating grindstone 11. It is rotated. As a result, the grinding surface 11 a of the rotary grindstone 11 is dressed by the diamond 18 at the tip of the dresser 16.

  Further, when the size of the workpiece W is changed during the grinding of the workpiece W, the extending direction of the guide rails 13 at the operating position P1 shown in FIG. Are moved individually in the vertical direction orthogonal to the. Thereby, according to the magnitude | size of the workpiece | work W, the space | interval between the both guide rails 13 is adjusted.

As described above, the double-sided grinding machine of this embodiment has the following effects.
(1) In the double-head grinding machine of this embodiment, switching mechanisms 19 are provided at both ends of the guide rail 13 to switch the guide rail 13 between the operating position P1 and the retracted position P2. For this reason, it is possible to prevent the dresser 16 of the dressing mechanism 15 from interfering with the guide rail 13 when the grinding surface 11 a of the rotating grindstone 11 is dressed. Therefore, unlike the conventional configuration, it is not necessary to perform the troublesome work of removing the guide rail from the position between the two rotating whetstones prior to the dressing work, and the dressing work can be performed easily and in a short time. The work of returning the position of the guide rail 13 at the time of resuming the processing is easy and the processing can be started quickly.

  (2) In the double-head grinding machine of this embodiment, the switching mechanism 19 is configured to also serve as an adjusting means for adjusting the distance between the two guide rails 13. Therefore, it is not necessary to provide an adjusting mechanism as an adjusting means separately from the switching mechanism 19, the structure can be simplified, and the interval between the guide rails 13 can be easily adjusted according to the size of the workpiece W. it can.

(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
In the above-described embodiment, only the upper guide rail 13 in the figure that interferes with the dressing mechanism 15 among the pair of guide rails 13 is configured to be switched between the operation position P1 and the retracted position P2 by the switching mechanism 19. thing. If comprised in this way, a number of parts can be reduced and a structure can be simplified.

  In the above-described embodiment, the illustrated left end side of the guide rail 13 is rotatably supported by the frame, and the illustrated right end side is rotated up and down by the switching mechanism 19 to be switched between the operation position P1 and the retracted position P2. To be configured. In this way, the structure of the switching mechanism 19 can be simplified.

  -In the said embodiment, the adjustment means for adjusting the space | interval between the guide rails 13 is provided separately, without using the switching mechanism 19 together.

  W: Workpiece, P1: Working position, P2: Retraction position, 11: Rotary grindstone, 11a: Grinding surface, 12A, 12B ... Support mechanism, 13 ... Guide rail, 15 ... Dressing mechanism, 16 ... Dresser, 19 ... Adjusting means Switching mechanism as switching means also used: 23 ... motor, 24 ... feed screw, 25 ... feed nut, 26 ... connecting screw as connecting means, 29 ... nut as connecting means, W ... workpiece, P1 ... working position, P2 ... Retraction position.

Claims (4)

A pair of rotating whetstones arranged in an opposing state on the same axis and for grinding a workpiece on opposing grinding surfaces;
A pair of guide rails arranged in parallel with an interval between the rotating whetstones, for guiding the work so that the work is passed between the grinding surfaces of both rotating whetstones;
In a double-head grinding machine equipped with a dressing mechanism for dressing the grinding surface of the double-rotating grindstone,
An operating position for guiding the work rail between the grinding surfaces of the rotating grindstones at least on the side of the pair of guide rails corresponding to the dressing mechanism, and a retracted position that does not interfere with the operating area of the dresser of the dressing mechanism A double-head grinding machine, characterized in that it is provided with switching means for switching between the two. The switching means is disposed corresponding to both ends of the guide rail, and the guide rail is switched between the operating position and the retracted position by moving both guide rails in a direction orthogonal to the extending direction. The double-head grinding machine according to 1. The switching means also serves as an adjusting means for adjusting the distance between the two guide rails by moving both guide rails in directions orthogonal to the extending direction. Double-head grinding machine as described. The switching means is moved in a direction orthogonal to the extending direction of the guide rail by rotation of the motor provided corresponding to both ends of each guide rail, a feed screw rotated by the motor, and rotation of the feed screw. The double-head grinding machine according to claim 2 or 3, comprising a feed nut and connecting means for connecting the feed nut to an end of the guide rail.

Images