JP2009202289A - Double head grinding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double head grinding machine having a simple constitution to adjust the interval of guide rails. <P>SOLUTION: A pair of guide rails 13 for guiding and moving a workpiece W are arranged in parallel between opposed surfaces of a pair of rotary grinding tools arranged in opposed states. A pair of adjusting mechanisms to adjust the intervals of both the guide rails 13 are provided at both end parts of the guide rails 13. A pair of driving cylinders 29 are arranged corresponding to each of the adjusting mechanisms. In a piston rod 29a of each of the driving cylinders 29, pressing levers 30 are located at a center part and are oscillatably connected. A connecting mechanism 32 constituted of a lever 33, a rod 34 and a fastening member 35 is provided between both the end parts of each of the pressing levers 30 and end parts of both the guide rails 13. The connecting mechanism 32 is operated via the pressing levers 30 by driving the driving cylinders 29. The end parts of both the guide rails 13 are fastened and fixed to interval-adjusting positions. <P>COPYRIGHT: (C)2009,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 surfaces of a pair of rotating grindstones arranged in an opposed state on the same axis, and the opposed surfaces of the rotating grindstones In particular, the present invention relates to a double-head grinding machine in which both sides of a workpiece are ground.

  Conventionally, as this type of 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 members.

A total of four fixing mechanisms are provided at both ends of each guide rail to fasten and fix the end of the guide rail to the distance adjustment position. The adjustment mechanism adjusts the distance between the two guide rails. In this state, the guide rail is fixed at the interval adjustment position by the fixing mechanism.
Utility Model Registration No. 2544376

  However, in this conventional double-head grinding machine, as described above, actuators such as cylinders are separately provided in the four fixing mechanisms for fixing the end portions of the guide rails to the distance adjustment position. For this reason, there is a problem that the structure for fixing the guide rail is complicated and the manufacturing cost is increased.

  The present invention has been made paying attention to such problems existing in the prior art. The purpose is to provide a double-headed grinding machine that can be simplified in construction.

  In order to achieve the above object, the present invention is arranged in a state of being opposed to each other on the same axis, and a pair of rotating whetstones for grinding a workpiece on the facing surface, and a gap between the rotating whetstones. And a pair of guide rails for guiding the work so that the work passes between the opposing surfaces of the two rotating grindstones, and both guide rails arranged corresponding to both ends of the guide rail. And a pair of adjusting means for adjusting the distance between the two guide rails by moving both ends of the two in the direction of approaching or separating from each other. Drive means to be moved, operating levers connected to the driving portions of the respective driving means so as to be swingable at the center, and provided between both ends of each operating lever and the ends of both guide rails. Concatenation When adjusting the distance between the two guide rails, the driving means transmits the operation for adjusting the distance to the ends of the two guide rails via the operating lever and the connecting means. It is characterized by being configured as described above.

  Therefore, since the guide rail is connected to both ends of the operating lever via the connecting means, it is not necessary to provide four drive means for fixing the guide rail corresponding to each end of both guide rails. Two drive means may be provided corresponding to one end side and the other end side of both guide rails. Therefore, the configuration can be simplified.

  The said structure WHEREIN: It is good to comprise so that the protrusion operation | movement of the said drive part may be transmitted as an operation | movement which fixes the same guide rail to a guide rail via an operating lever. This eliminates the need for a spring means for fixing the guide rail.

  In the above-described configuration, each of the adjusting means is screwed into the adjusting screw having a pair of screw portions having different spiral directions, and a female screw to each screw portion of the adjusting screw, and is connected to the end of each guide rail. It is preferable that the distance between the guide rails be adjusted by rotating the adjusting screw so that the adjusting members approach or separate from each other by the action of the screw. When configured in this way, the end of both guide rails can be simultaneously moved in the direction of approaching or separating via the adjusting member by the rotation of the adjusting bolt, and the distance between the guide rails can be easily adjusted. be able to.

  In the above configuration, each of the connecting means is connected to the fixed lever rotatably supported by the adjustment member so as to engage with the end of the operating lever, and is connected to the fixed lever at one end. A rod provided with a fastening member at the other end may be provided, and the fastening member may be configured to fasten the guide rail by movement of the rod accompanying the operation of the operating lever. In such a configuration, the structure of the fixing member is simple, and the end portion of the guide rail can be appropriately tightened and fixed at the interval adjustment position when the operation lever is operated by the driving means.

  The said structure WHEREIN: It is good to comprise so that the both ends of each said guide rail may be clamped and fixed to a space | interval adjustment position by press-contacting to a part of flame | frame via a spacer. In this configuration, the end of the guide rail is firmly pressed and fixed at the distance adjustment position by the end of the guide rail being pressed against a part of the frame via the spacer when the driving means is operated. can do.

  As described above, according to the present invention, it is possible to simplify the configuration for fixing the guide rail to the interval adjustment position.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, in the double-head grinding machine of this embodiment, a pair of rotating grindstones 11 rotate with their central axes arranged on the same axis, and thus facing each other so as to be parallel to each other. It is installed as possible. A pair of support mechanisms 12 </ b> A and 12 </ b> B are arranged on both sides of the rotating grindstone 11 (right and left sides in FIGS. 1 and 2). A pair of (in the embodiment, a pair of upper and lower) guide rails 13 are installed and supported between the support mechanisms 12A and 12B at an interval, and are extended in parallel in the lateral direction between the opposing surfaces 11a of the rotary grindstones 11. ing. Between the illustrated left end portions of both guide rails 13, a pair of upper and lower conveyors 14 for carrying the workpiece W between the rotating grindstones 11 is disposed. During rotation of the rotary grindstone 11, the workpiece W such as a bearing race carried by the conveyor 14 is guided and moved between the guide rails 13 so as to pass between the opposing surfaces 11 a of the rotary grindstone 11. Grinding is performed on both side surfaces of the workpiece W by the facing surface 11 a of the rotating grindstone 11.

  The support mechanisms 12A and 12B are provided with adjusting mechanisms 15A and 15B as adjusting means for adjusting the distance between the guide rails 13, respectively. The support mechanisms 12A and 12B are provided with fixing mechanisms 16A and 16B for fixing the end portions of the guide rails 13 to the distance adjustment position, respectively. The adjusting mechanisms 15A and 15B and the fixing mechanisms 16A and 16B are arranged symmetrically in the left and right support mechanisms 12A and 12B, and are configured to have the same structure. Further, the left and right adjusting mechanisms 15A and 15B and the fixing mechanisms 16A and 16B are operated in synchronization with each other. When the workpiece W is changed to one having a different size (vertical width or outer diameter), the distance between the guide rails 13 is adjusted by the adjusting mechanisms 15A and 15B according to the size of the workpiece W. The end portions of the guide rail 13 are fastened and fixed at the distance adjustment position by the fixing mechanisms 16A and 16B.

  Therefore, the configuration of the adjusting mechanisms 15A and 15B and the fixing mechanisms 16A and 16B will be described in detail on behalf of the adjusting mechanism 15A and the fixing mechanism 16A provided on the support mechanism 12A on the right side of the rotating grindstone 11.

  That is, as shown in FIGS. 1 and 3, the frame 18 of the support mechanism 12A is formed in a substantially box shape, and a pair of elongated holes 18a extending in the vertical direction are formed in the front wall. A support plate 20 having a long hole 20 a corresponding to the long hole 18 a is fixed to the front surface of the frame 18, and the end portions of the both guide rails 13 are joined to the front surface of the support plate 20 via spacers 21. ing.

  As shown in FIG. 3, an adjusting screw 22 of an adjusting mechanism 15A is rotatably supported between the upper and lower walls of the frame 18 via a pair of bearing sleeves 23. The adjusting screw 22 has a pair of different spiral directions. Screw portions 22a and 22b are formed. A pair of vertically movable adjustment blocks 24 are screwed into the respective screw portions 22a and 22b of the adjustment screw 22 and are connected to the end portions of the respective guide rails 13 via rods 34 described later. Yes. An adjustment motor 25 is disposed on the upper surface of the frame 18, and its motor shaft is connected to the adjustment screw 22 via a connection mechanism such as sprockets 26 and 27 and a chain 28. Then, when the adjusting screw 22 is rotated by the adjusting motor 25, the ends of the both guide rails 13 are moved toward or away from each other via the adjusting block 24, and the distance between the both guide rails 13 is adjusted. Is done.

  As shown in FIGS. 3 and 4, a drive cylinder 29 that constitutes a drive unit of the fixing mechanism 16 </ b> A is disposed at the rear of the frame 18 corresponding to the adjustment screw 22 of the adjustment mechanism 15 </ b> A. In the frame 18, a pressing lever 30 as an operating lever is supported on the piston rod 29 a of the driving cylinder 29 at the center thereof so as to be swingable via a support body 31 and a support shaft 31 a. The piston rod 29a constitutes a drive unit.

  A connecting mechanism 32 as a connecting means is interposed between both ends of the pressing lever 30 and the ends of the both guide rails 13. Each of these coupling mechanisms 32 includes a lever 33, a rod 34, and a fastening member 35. As shown in FIGS. 3 and 5, the lever 33 of the coupling mechanism 32 is rotatably supported by the adjustment block 24 by a support shaft 36 at an intermediate portion. An engaging part 33a is engaged with which the part is engaged. The engaging portions 33a of the upper and lower levers 33 are engaged at equal distances with respect to the connecting portion of the pressing lever 30 with the support shaft 31a. The rod 34 of the coupling mechanism 32 is movable in the front-rear direction to the hole of the adjustment block 24, the long hole 18a of the front wall of the frame 18, the long hole 20a of the support plate 20, the hole of the spacer 21, and the hole of the guide rail 13, respectively. It is inserted. A connecting portion 34 a at the rear end of the rod 34 is connected to the other end of the lever 33 via a connecting pin 37. Accordingly, the rod 34, the spacer 21 and the guide rail 13 are moved up and down together with the adjustment block 24. A threaded portion 34 b is formed at the front end portion of the rod 34 and protrudes from the front surface of the guide rail 13. The tightening member 35 of the coupling mechanism 32 is detachably screwed to the threaded portion 34b of the rod 34, and a handle portion 35a for operating when the tightening member 35 is detached from the threaded portion 34b protrudes from the front surface thereof. ing.

  Then, when the piston rod 29a of the drive cylinder 29 of the fixing mechanisms 16A and 16B is protruded in a state where the distance between the guide rails 13 is adjusted by the adjusting mechanisms 15A and 15B, both of them are pressed by the pressing lever 30. The lever 33 of the coupling mechanism 32 is rotated via the support shaft 36, and this rotation causes the rod 34 to be retracted and moved rearward via the connection pin 37. By this retraction movement, the fastening member 35 is moved rearward, and the end portion of the guide rail 13 is pressed against the front surface of the support plate 20 via the spacer 21. As a result, the end portion of the guide rail 13 is moved to the interval adjustment position. Tightened and fixed.

Next, the operation of the double-headed grinding machine configured as described above will be described.
In the state shown in FIGS. 1 to 3, the distance between the guide rails 13 is adjusted to a required interval according to the size of the workpiece W by the adjusting mechanisms 15A and 15B, and the interval is adjusted by the fixing mechanisms 16A and 16B. The state is fixed. In this state, when the double-head grinding machine is operated, the double-rotating grindstone 11 is rotated by a motor (not shown), and a plurality of workpieces W are sequentially carried between the guide rails 13 by the conveyor 14 from the left end side in the figure. The Each workpiece W is guided and moved between the guide rails 13 so as to pass between the opposing surfaces 11a of the rotating grindstone 11, and the opposite surfaces 11a of the rotating grindstones 11 are ground on both sides of the workpiece W. The The ground workpiece W is discharged in order from the right end of both guide rails 13.

  When the workpiece W is changed to one having a different size, it is necessary to adjust the distance between the guide rails 13 according to the size of the workpiece W. In this case, first, the piston rod 29a of the drive cylinder 29 in the fixing mechanisms 16A and 16B is operated to be immersed, and the pressing lever 30 is moved to the rear position. By this rearward movement, as shown by the solid line in FIG. 4, the rod 34 can be projected and moved forward via the lever 33 of the coupling mechanism 32, and the fastening member 35 can be separated from the front surface of the end of the guide rail 13. Thus, the guide rail 13 is released from the tightened and fixed state.

  In this state, when the adjusting motor 25 of the adjusting mechanisms 15A and 15B is rotated, the adjusting screw 22 is rotated via the coupling mechanisms such as the sprockets 26 and 27 and the chain 28, and the screw portion 22a on the adjusting screw 22 is rotated. , 22b and the pair of adjusting blocks 24 are moved in the direction of approaching or separating from each other by the action of the screws. By this movement, the ends of the both guide rails 13 are moved in the direction of approaching or separating from each other via the rod 34, and the distance between the both guide rails 13 is adjusted.

  Thereafter, the piston rod 29a of the drive cylinder 29 in the fixing mechanisms 16A and 16B is protruded, and the pressing lever 30 is moved to the front position. For this reason, the lever 33 of the coupling mechanism 32 is rotated to the position indicated by the two-dot chain line in FIG. 4, the rod 34 is pulled backward through the lever 33, and the fastening member 35 is moved backward. By this rearward movement, the end of the guide rail 13 is pressed against the front surface of the support plate 20 via the spacer 21, and the end of the guide rail 13 is fastened and fixed at the distance adjustment position.

  Further, when the workpiece W is changed to one having a different thickness, it is necessary to replace the spacers 21 at both ends of the both guide rails 13 with a thickness that matches the thickness of the workpiece W. In this case, the guide rail 13 is released from the tightened and fixed state by releasing the fixing mechanisms 16A and 16B in the same manner as the adjustment of the interval between the guide rails 13 described above. In this state, the fastening members 35 at both ends of both guide rails 13 are removed from the threaded portions 34b of the rods 34 by rotating in the loosening direction by operating the handle portions 35a. Further, both end portions of each guide rail 13 are extracted from the front end portion of each rod 34, and each spacer 21 is replaced with one having a different thickness.

  Thereafter, both ends of both guide rails 13 are attached to the front ends of the rods 34 in the reverse order to the above-described removal, and the fastening members 35 are screwed onto the screw portions 34b of the rods 34. In this state, as in the case of adjusting the interval between the guide rails 13 described above, the guide rails 13 are fastened and fixed by fixing the fixing mechanisms 16A and 16B.

Therefore, the double-sided grinding machine of this embodiment has the following effects.
(1) In this double-head grinding machine, the two drive cylinders 29 can simultaneously clamp and fix the end portions of the both guide rails 13 to the interval adjustment position via the holding lever 30 and the pair of coupling mechanisms 32.

  (2) Further, in this state, since the holding lever 30 is pivotably connected to the piston rod 29a of the drive cylinder 29 at the center portion, the guide rails 13 are simultaneously tightened and fixed with an equal tightening force. can do. Therefore, unlike the conventional configuration, there is no need to provide four driving means corresponding to each end of both guide rails, the configuration for fixing the guide rail 13 can be simplified, and the entire device can be simplified. The manufacturing cost can be reduced.

  (3) The holding lever 30 is rotated by the protrusion operation of the piston rod 29a, and is transmitted as an operation for fixing the guide rail 13 to the guide rail 13 via the rod 34 or the like. For this reason, means, such as a spring, for fixing the guide rail 13 becomes unnecessary, and the configuration can be simplified.

(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
In the embodiment described above, the guide rail 13 is fixed by rotating the pressing lever 30 by the protruding operation of the piston rod 29a. Contrary to this, the guide rail 13 is fixed by releasing the piston rod 29a. For this purpose, for example, a spring that biases the guide rail 13 in the tightening direction is provided, and the tightening member 35 is moved in the tightening release direction against the action of the spring by the protruding operation of the piston rod 29a. Constitute.

  -The interval between the guide rails 13 should be configured only by adjusting the vertical position of one guide rail 13. In this case, the screw portion of the adjustment screw 22 is provided only at one place, and the adjustment blocks 24 that can be adjusted in the vertical position are provided on the left and right sides corresponding to the screw portions.

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 sectional side view which expands and shows the support structure of the one end part side of a guide rail in the double-headed grinding machine of FIG. FIG. 4 is a cross-sectional plan view of a main part of the support structure of FIG. The perspective view which decomposes | disassembles and shows a part of support structure of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Rotary grindstone, 11a ... Opposite surface, 12A, 12B ... Support mechanism, 13 ... Guide rail, 15A, 15B ... Adjustment mechanism as adjustment means, 16A, 16B ... Fixation mechanism as fixation means, 18 ... Frame, 20 ... Support plate, 21 ... spacer, 22 ... adjusting screw, 22a, 22b ... screw part, 24 ... adjusting member, 25 ... adjusting motor, 29 ... driving cylinder as driving means, 29a ... piston rod as driving part, 30 ... A pressing lever as an actuating lever, 32... A connecting mechanism as a connecting means, 33... Lever, 33 a .. engaging portion, 34 ... a rod, 34 a ... connecting portion, 34 b ... a screw portion, 35.

Claims (5)

A pair of rotating grindstones arranged in a facing state on the same axis and for grinding the workpiece on the facing surface;
A pair of guide rails arranged in parallel with an interval between the rotating grindstones, for guiding the work so that the work passes between the opposing surfaces of both rotating grindstones;
A pair of adjusting means arranged to correspond to both ends of the guide rail and moving both ends of the guide rails in a direction approaching or separating from each other to adjust the distance between the guide rails; In the double-head grinding machine, the adjusting means is
Drive means in which the drive unit is moved linearly;
An actuating lever connected to the driving portion of each driving means so as to be swingable at the central portion;
And connecting means provided between both ends of each actuating lever and the ends of both guide rails. When adjusting the distance between the two guide rails, the actuating lever is driven by the driving means. And a double-head grinding machine characterized in that an operation for adjusting the distance is transmitted to the end portions of both guide rails via the connecting means. 2. The double-head grinding machine according to claim 1, wherein the projecting operation of the driving unit is transmitted as an operation of fixing the guide rail to the guide rail via an operating lever. Each of the adjusting means includes a pair of adjusting screws having a pair of screw portions having different spiral directions and a female screw screwed to each screw portion of the adjusting screw and connected to an end portion of each guide rail. 3. The space between the guide rails is adjusted by rotating the adjusting screw so that the adjusting members approach or separate from each other by the action of the screw. Double-head grinding machine as described. Each of the connecting means is coupled to the fixed lever rotatably supported by the adjustment member so as to engage with the end of the operating lever, and is connected to the fixed lever at one end and tightened to the other end. 4. The double-head grinding machine according to claim 3, further comprising: a rod provided with a member, wherein the tightening member tightens the guide rail by the movement of the rod accompanying the operation of the operation lever. The both ends of each guide rail are clamped and fixed at a distance adjustment position by being pressed against a part of the frame via a spacer, according to any one of claims 1 to 4. Double-head grinding machine as described.

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