JP5695877B2 - Centerless grinding machine - Google Patents

Description

  The present invention moves a workpiece through a pair of guide plates on the inlet side onto a blade between a grinding wheel and an adjusting wheel, and the workpiece after grinding by the grinding stone is transferred to a pair of guide plates on the outlet side. It is related with the centerless grinder which discharged | emitted through between.

  In the centerless grinding machine, the workpiece is passed between the grinding wheel for adjustment and grinding, which is interposed between the guide plate on the inlet side and the guide plate on the outlet side. It is mounted on a grinding table and adjusted before and after the workpiece (to deal with the workpiece diameter) (especially the adjustment wheel is used for precise adjustment to affect the machining accuracy of the workpiece). Necessary) is done by manipulating the screws attached to the grinding table. As a so-called change-over operation, the adjustment grindstone is moved forward (approached) or moved backward (released) to determine the position of the peripheral surface that is the adjustment surface of the adjustment grindstone, and then the guide plate on the adjustment grindstone side. The guide surface of the grinding wheel must be adjusted by the screw operation so that it is aligned with the peripheral side surface. (By the way, the guide plate on the grinding wheel side is for preventing the workpiece from violating during grinding. It is not necessary to adjust the position exactly like the guide plate on the grindstone side). In any case, the adjustment grindstone is moved forward and backward with respect to the grinding wheel, and the guide plate on the adjustment grindstone side is moved in accordance with the advancement and retraction. It is necessary to advance and retreat, and the positioning (adjustment) operation of the adjusting wheel according to the workpiece and the positioning (adjustment) operation of the guide plate according to the workpiece are performed separately (for example, patent documents) 1).

Public Kaihei 2-15857

  In recent years, grinding processing at the time of through-feed of centerless grinders, the processing lot has become smaller, the frequency of change (adjustment operation) to a different outer diameter (workpiece) has increased, positioning operation on the guide plate side and grinding wheel If the positioning operation on the (adjustment) side is performed separately, productivity will be affected and improvement is desired.

  The present invention provides a rough adjustment of the guide plate on the adjustment wheel side in conjunction with the adjustment wheel position change operation (adjustment operation of the separation distance between the grinding wheel and the adjustment wheel) that is always performed according to the change in the outer diameter of the workpiece. The centerless grinder was created with the aim of improving the work efficiency of through-feed type grinding of the centerless grinder (according to changes in the outer diameter of the workpiece). is there.

In a centerless grinding machine in which a grinding wheel supporting a grinding wheel is supported on a machine table via a grinding wheel and an adjusting wheel supporting an adjusting wheel are arranged relative to each other, the lower end of the grinding table is pivoted by a support shaft. The upper end of the connecting piece is pivotally connected by a first connecting pin to the intermediate portion in the vertical direction of the guide plate mounting arm on the adjusting grindstone side, while the lower end of the connecting piece is connected to the grinding table. second coupling pin at the same height as the support shaft to advance and retreat configuration was the adjusted chassis by rotatably connected with Te, by advancing and retreating the adjusting undercarriage relative to the grinding table, the guide surface is the It is a basic means that a guide plate for a workpiece that moves forward and backward so as to be positioned on the same surface as the peripheral side surface of the adjusting grindstone is provided at the upper end of the guide plate mounting arm on the adjusting grindstone side .

  According to the present invention, the guide wheel on the side of the adjusting wheel is interlocked with the position changing operation of the adjusting wheel (the adjusting operation of the separation distance between the grinding wheel and the adjusting wheel) that is always performed according to the change in the outer diameter of the workpiece. Therefore, it is possible to provide a centerless grinder with improved work efficiency of through-feed grinding of the centerless grinder.

The schematic front view of a centerless grinding machine. The top view of FIG. The partially expanded view of FIG. FIG. 4 is a plan view of FIG. 3. FIG. 2 is an enlarged view of a part of FIG.

  In the centerless grinding machine according to the present invention, a grinding wheel base 4 that supports a grinding wheel 3 via a grinding wheel 2 and an adjustment wheel base 6 that supports an adjustment wheel 5 are provided relative to each other on a machine base 1, and a through feed is provided. At the time of grinding, a workpiece (work) W is fed onto a blade 7 provided on the grinding table 2 through guide plates 8A and 8B which are relatively provided on one inlet side of the grindstones 3 and 5, and grinding by the grinding grindstone 3 is performed. The subsequent workpiece is discharged through the guide plates 9A and 9B which are provided on the other exit side of the grindstones 3 and 5.

  The grinding wheel 3 and the adjusting wheel 5 adjust the position of the workpiece W by moving the adjusting wheel 6 provided with the adjusting wheel 5 in the grinding table 2 direction according to the mode (diameter) of the workpiece W. It is.

  The present invention can also be applied to a centerless grinder that advances and retracts the grinding wheel base 4 with respect to the grinding table 2.

  Positions deviating from the grindstones 3 and 5 on both sides (both sides in the direction along the axis of the grindstones 3 and 5) of the grinding table 2 that supports the blade 7 that supports the workpiece W with the tip surface (top surface) 7a. Includes a pair of guide plates 8A, 8B. 9A and 9B are provided.

  A pair of inlet side guide plates 8A and 8B provided at a portion corresponding to the inlet side for feeding the workpiece W to the blade 7 (tip surface 7a thereof) and an outlet provided at a portion corresponding to the outlet (discharge) side of the workpiece W One of the side guide plates 9A, 9B corresponds to the grinding wheel 3 and the other 8B, 9B corresponds to the adjustment wheel 5, and each guide plate 8A, 9A. 8B and 9B are guide surfaces 8'A, 9'A. 8'B and 9'B are used in alignment with the peripheral side surfaces 3a and 5a of the grindstones 3 and 5 (positioned on the same surface).

  The guide plates 8A and 9A on the grinding wheel 3 side are attached to guide plate mounting arms 12A and 13A whose lower ends are swingably mounted on the grinding table 2 by the support shafts 10A and 11A, and mounting means (mounting screws) 14A and 15A. By operating the adjusting means 16A, 17A provided on the mounting arms 12A, 13A, the guide surfaces are displaced along with the mounting arms 12A, 13A swinging about the support shafts 10A, 11A. 8'A and 9'A are made to coincide with the peripheral side surface 3a of the grinding wheel 3 (positioned on the same surface).

  The guide plates 8B and 9B on the side of the adjusting grindstone 5 are attached to the grinding table 2 by supporting shafts 10B and 11B so as to be able to swing (movably pivoted). It is attached to the upper ends of the arms 12B and 13B with attachment means 14B and 15B, and the adjustment means 16B and 16B '. By operating 17B and 17B ', the guide surfaces 8'B and 9'B are made parallel (on the same surface) with the peripheral side surface 5a of the adjusting grindstone 5.

  The guide plate mounting arms 12B and 13B on the side of the adjusting grindstone 5 are arranged so as to face the guide plate mounting arms 12A and 13A on the grinding wheel 3 side (the guide plates 8B, 9B.8A and 9A attached to these are also facing). As in the case of the guide plates 8A and 9A on the grinding wheel 3 side, the lower end thereof is pivotally attached to the grinding table 2 by the support shafts 10B and 11B as described above.

  Connecting portion pieces 112B and 113B project from an intermediate portion between the support shafts 10B and 11B and the guide plates 12B and 13B of the guide plate mounting arms 12B and 13B on the adjusting grindstone 5 side. The adjustment chassis 6 is provided with the other end (lower end) of connecting pieces (links) 19 and 19 ', which are rotatably connected to the first and second connecting pins 18 and 18' to 112B and 113B. The connecting pieces 116 and 116 'are rotatably connected by the second connecting pins 20 and 20'.

  The connecting piece 116, 116 ′ is erected on the tip of the upper surface of the adjustment chassis 6 on the grinding table 2 side, and is moved by being guided by the rail 22 according to the advancing / retreating operation means 21 of the adjustment chassis 6. 6 moves forward and backward with respect to the grinding table 2. The connecting pieces 19 and 19 'are pressed or pulled by the second connecting pins 20 and 20' that are pivots assembled to the connecting pieces 116 and 116 ', and the first connecting pieces are undulated. The guide plate mounting arms 12B and 13B on the adjustment grindstone 5 side are swung (rotated) about the support shafts 10B and 11B via the pins 18 and 18 '.

  The advancing / retreating operation means 21 is composed of a female thread material provided on the adjustment chassis 6 side and a male thread rod screwed into this, and by rotating the male thread rod, the regulation chassis 6 to which the female thread material is fixed is attached to the grinding table 2. In contrast, the advancing / retreating means may be a hydraulic cylinder or a linear motor.

  When the set-up operation means 21 is operated to move the adjusting carriage 6 backward with respect to the grinding table 2 at the time of changing the setup due to the change of the workpiece, the adjusting wheel 5 provided on the adjusting table 6 is ground. It will retreat from the stand 2 position. Further, since the connecting pieces 19 and 19 ′ are connected to the lower end portions of the second connecting pins 20 and 20 ′ to the adjusting chassis 6, the connecting pieces 19 and 19 ′ are pulled by the adjusting chassis 6 and the connecting pieces 19 are connected. , 19 ′, the guide plate mounting arms 12B, 13B having the upper ends connected by the first connecting pins 18, 18 ′ swing around the supporting shafts 10B, 11B, and the guides mounted on the arms 12B, 13B. The plates 8B and 9B are separated from the grinding table 2 position. In short, the guide plate 8B, 9B is also moved forward and backward with the guide plates 8B and 9B by the forward and backward movement of the adjusting carriage base 6 with respect to the grinding base 2.

  In the embodiment, the connection pieces 116 and 116 ′ of the connecting pieces 19 and 19 ′ are fixed to the adjustment chassis 6, but provided with connection portions corresponding to the connection pieces 116 and 116 ′. The moving grindstone 2 is guided by a guide material such as a rail on the side of the adjustment carriage 6 with respect to the grinding stand 2 so that the moving body can be moved forward and backward, and the position of the adjustment grindstone 5 can be adjusted. The position of the guide plates 8B and 9B corresponding to wear can be adjusted.

DESCRIPTION OF SYMBOLS 1 Machine stand 2 Grinding stand 3 Grinding wheel 4 Grinding wheel stand 5 Adjusting wheel 6 Adjusting wheel stand 8B Guide plate 8'B Guide surface 9B Guide plate 9'B Guide surfaces 12B and 13B Guide plate mounting arms 18 and 18 'on the adjusting wheel side One connection pin 19, 19 'Connection piece 20, 20' Second connection pin W Workpiece

Claims (1)

In a centerless grinding machine in which a grinding wheel supporting a grinding wheel is supported on a machine table via a grinding wheel and an adjusting wheel supporting an adjusting wheel are mounted relative to each other.
The upper end of the connecting piece is pivotally connected by a first connecting pin to an intermediate portion in the vertical direction of the guide plate mounting arm on the side of the adjusting grindstone, which is pivotably attached to the grinding table by a support shaft at the lower end. on the other hand,
The lower end of the connecting piece, and rotatably connected by the second connecting pin at the same height as the support shaft to advance and retreat configuration was the adjusted undercarriage relative to the grinding table,
By advancing and retreating the adjusting undercarriage relative to the grinding table, a guide plate workpiece guide surface moves forward and backward so as to be positioned on the peripheral side surface and the surface of the regulating wheel of the regulating wheel side guide plate attachment arm Centerless grinding machine provided at the upper end of

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