JP2553403B2 - Sizing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sizing device for directly measuring and sizing a workpiece diameter during grinding.

2. Description of the Related Art Conventionally, a sizing apparatus has a straight-moving type moving mechanism that moves a measuring section forward during grinding by moving straight in the X-axis direction and retracts the measuring section during attachment / detachment of a workpiece.

Problems to be Solved by the Invention The sizing device provided with the linear movement mechanism in the X-axis direction described in the prior art has no problem because the stroke is small when the workpiece diameter is relatively small, but there is no problem. In this case, the stroke becomes large, and the waterproof front cover is pushed out to the operator side. For this reason, it becomes difficult for an operator to monitor the grinding point, and there is a problem that operability deteriorates.

The present invention has been made in view of such problems of the conventional technique, and an object of the present invention is to reduce an environmental change between a measurement time and an evacuation time to reduce a thermal influence and to perform grinding. An object of the present invention is to provide a sizing device that can easily monitor points, has good operability, and has a wide measurement range.

Means for Solving the Problems In order to achieve the above object, a sizing device according to the present invention is a grinder capable of horizontally swiveling in the axial direction of a workpiece provided with a measuring portion having a pair of upper and lower measuring elements in the horizontal direction. In the sizing device, the measuring unit is provided with a swivel indexing unit capable of switching between right swivel and left swivel and indexing at a measuring position and a retracted position, and a column supporting the probe is circulated with the coolant liquid. The pipe is formed so that the flow of the coolant is always flowing and the pipe is sprinkled from the outlet of the coolant liquid from above the sizing device to reduce the environmental changes during measurement and evacuation and to reduce the heat effect. Is less.

Action The work piece is normally attached / detached while the measuring section is rotated rightward and retracted by the rotating indexing means, and the measuring section is rotated leftward at the same time as the grinding process is started to position the workpiece at the measuring position.

If the workpiece has a collar on the right side of the grinding point, rotate the swivel cylinder to which the measuring unit is attached 90 degrees out of phase and move it to the left to retract.

The coolant liquid for sprinkling the sizing device is constantly flowing in the coolant distribution pipe in the swirl cylinder, and the coolant liquid is constantly sprinkling on the sizing device even during non-measurement to change the environment during and after measurement. To reduce the heat effect and suppress the heat fluctuation of the turning itself.

EXAMPLE An example will be described with reference to FIGS. 1 and 2.

A table 1 is movably mounted on a sliding surface in the Z-axis direction, which is cut on the front side of a bed (not shown) of a well-known cylindrical grinder, via a carriage, and a headstock (not shown) on the table 1 is mounted. A sizing device is attached between the tailstock and the tailstock so that the position can be moved. The work W is horizontally supported by the headstock and the tailstock.

A swivel shaft 5 is rotatably supported by a plurality of bearings 4 through a bearing housing 3 in a vertical through hole 2a of a frame 2 of the sizing device. A pinion 6 is fitted on the swivel shaft 5, and a rack 9 is engraved on a piston 8 fitted into a hydraulic cylinder 7 formed at a position corresponding to the pinion of the frame 2, and the rack 9 is attached to the pinion 6. And the swivel shaft 5 is swiveled 90 ° in the horizontal plane by switching the pressure oil. A plate 12 is concentrically fitted to the upper end of the revolving shaft 5 via a key 11, and a revolving cylinder 14 is concentrically fixed to the plate 12 via a key 13 by a plurality of bolts 19. Keyways 14b to 14e are engraved in a cross shape on the mounting surface 14a of the swivel cylinder 14 on the plate 12, and the keyways 14b and the key 13 are engaged with each other when the measuring unit described later is swung right. The swivel cylinder 14 is attached so as to be aligned, and when the swivel cylinder 14 is retracted to the left, the swivel cylinder 14 is attached with a 90 ° phase shift so that the key groove 14c engages with the key 13. In addition to 90 °, the phase can be arbitrarily shifted as needed if it is a multiple of 90 °. The center hole of the swivel cylinder 14 is
It is formed on the coolant flow passage 14f and has a lid 1 on the upper end.
5 is fixed. A rotary joint 16 is screwed onto the lid 15, and the coolant is supplied through the rotary joint 16. And the coolant liquid is an outflow port drilled at the bottom.
It flows out from 14g and is sprinkled from above the sizing device by a pipe (not shown).

The side surface of the swivel cylinder 14 on the key groove 14d side is formed into a flat surface 14h,
Slide guides 17 and 18 are vertically fixed to the flat surface 14h, and measuring units 22A and 22B are attached to the slide guides via double slides 20 and 21 so as to be positionally adjustable. As the measuring parts 22A and 22B, for example, commercially available products such as those manufactured by Tokyo Seimitsu Co., Ltd. can be used, and these become smaller as the outer diameter of the workpiece W is sandwiched by the contactor 24 at the tip of the finger 23 and become smaller as the machining proceeds. The movement of the finger 23 that follows the diameter is detected by the differential transformer in the measuring head 25 and a measurement signal proportional to the diameter is output, and a sizing signal is output when the control unit (not shown) matches the set value. is there.

 Next, the operation of this embodiment will be described.

When attaching or detaching the workpiece W, pressure oil is normally supplied to the right chamber of the hydraulic cylinder 7 to move the piston 8 and the rack 9 to the left, and the measuring units 22A and 22B are moved through the pinion 6 in the axial direction of the workpiece. Rotate 90 ° to the right and retreat horizontally.

Then, a grindstone (not shown) advances to start grinding, and at the same time, pressure oil is supplied to the left chamber of the hydraulic cylinder 7 so that the measuring units 22A and 22B turn horizontally to the left and are positioned at the measuring position. Outer diameter measurement is started with the child 24 sandwiching the outer diameter of the workpiece. When the grinding process progresses and the outer diameter becomes smaller, the measurement signal changes in proportion to the diameter, and when it matches the preset value set in the control unit (not shown), the sizing signal is output and the cutting of the grindstone is stopped and spark out to go into. Then, when the timer is activated and the set time has elapsed, a signal is output and the grindstone moves back to finish the grinding process, and at the same time, the measuring section turns 90 ° to the right and retreats.

The above operation is an example of the operation of retracting the measuring units 22A, 22B to the right side (tailstock side), but if there is a collar on the right side of the grinding point and you want to retract it to the left side (headstock side), Bolt 19
And the key groove 14c is shifted in phase by 90 ° so that the key groove 14c engages with the key 13, and the revolving cylinder 14 is reassembled. In this case, when pressure oil is supplied to the left chamber of the hydraulic cylinder 7, it turns left to the retracted position, and when pressure oil is supplied to the right chamber, it turns right to the measurement position.

The measuring unit is connected to the flow pipe 14f in the swivel cylinder via the rotary joint 16.
The coolant that has always flowed through the outlet is sprinkled from the outlet 16g by a pipe (not shown) from above the measuring part of the sizing device, and is exposed to the splash of coolant that flows out from the grinding liquid nozzle at the measurement position. The same environmental conditions as the above are maintained even in the retracted position, and at the same time, the heat fluctuation of the swivel cylinder 14 is suppressed.

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it has the following effects.

The swivel indexing device swivels and positions the measuring unit between the measuring position and the retracted position, so that it moves to the operator side compared to the conventional sizing device that moves linearly in a direction perpendicular to the workpiece. Space is not needed. For this reason, especially for a large-diameter workpiece, the operator can lean closer to the machine side, the grinding point can be easily monitored, and the operability is improved. Also, since there is no hindrance caused by installing a large-diameter sizing device, by preparing one sizing device with a large measuring range, it is possible to handle large to small workpieces, which is economical. is there.

In addition, since the measuring unit can be rotated rightward or leftward, it can be used for workpieces of any shape that can avoid the direction of the collar.

In addition, a coolant liquid flow passage was provided in the swirl cylinder to suppress heat fluctuations in the swirl cylinder, and the coolant liquid was constantly sprinkled from above the sizing device to reduce the environmental changes during measurement and evacuation to reduce the heat effect. Therefore, the accuracy is stable.

[Brief description of drawings]

FIG. 1 is a side view of the sizing apparatus of this embodiment, and FIG. 2 is a sectional view taken along the line AA of FIG. 5 …… Swivel axis, 7 …… Hydraulic cylinder 14 …… Swivel cylinder 14f …… Coolant liquid flow conduit 22A, 22B …… Measuring section

Claims (1)

(57) [Claims] 1. A sizing device for a grinding machine, wherein a measuring unit having a pair of upper and lower measuring elements is horizontally rotatable in the axial direction of a workpiece, and the measuring unit has a measuring position and a retracted position. And a turning indexing means capable of switching between right turning and left turning and indexing are provided, and a column for supporting the measuring element is formed by a flow path of the coolant, and the flow is always flowing through the coolant. The sizing device is characterized in that a pipe line is sprinkled from above the sizing device from the outlet of the pipe to reduce environmental changes during measurement and during evacuation to reduce thermal influence.