JPH045245Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The present invention blows air toward the inner peripheral surface of the workpiece when honing the inner peripheral surface of the workpiece. The present invention relates to an improvement of a honing device equipped with an in-process air gauge that measures the honing state of the inner circumferential surface of a workpiece by detecting the discharge pressure of the workpiece.

(Prior art) Conventionally, as a honing device equipped with such an in-process air gauge, for example,
As disclosed in Japanese Patent No. 81055, a cone rod is inserted into a cylindrical tool body that is rotatably and reciprocally movable so that it can move forward and backward, and by moving this cone rod forward, a plurality of tools arranged at the tip of the cone rod are inserted. The honing stone is expanded radially outward to hon the inner circumferential surface of the workpiece. During this honing process, air is blown toward the inner circumferential surface of the workpiece from a nozzle installed on the side of the honing wheel of the tool body that communicates with the in-process air gauge, and the air discharge pressure at this time is An in-process air gauge is known in which the honing state of the inner circumferential surface of a workpiece is measured by detection.

(Problems to be solved by the invention) By the way, when honing the inner circumferential surface of the workpiece as described above, it is possible to remove frictional heat during machining, improve machining accuracy, extend tool life, and even eliminate chips. Oil-based coolant is usually supplied to the processing area in order to remove etc. On the other hand, when using a diamond whetstone as a honing whetstone, there is a recent trend to use a water-soluble coolant instead of the oil-based coolant because it is less likely to clog than commonly used whetstones.

However, this water-soluble coolant generally has inferior cleaning ability compared to oil-based coolant, so in the case of honing equipment equipped with an in-process air gauge like the conventional one mentioned above, abrasive powder and chips are removed from the air outlet of the nozzle. becomes easier to accumulate. If abrasive powder etc. accumulates in this way, the amount of air discharged from the nozzle will fluctuate, making it impossible to accurately measure the machining condition of the inner circumferential surface of the workpiece. A problem arises in that the sizing accuracy of the surface is reduced.

The present invention has been made in view of the above points, and its purpose is to provide a honing tool with appropriate means for lifting it up.
By moving the honing tool backwards while rotating after the machining is completed, abrasive particles and chips adhering to the air outlet of the nozzle are removed, preventing them from accumulating at the air outlet, and furthermore, during machining. The abrasive powder peeled off due to friction is removed from the outer circumferential surface of the honing whetstone, so that the whetstone does not become clogged. Therefore, the machining condition of the inner circumferential surface of the workpiece can be accurately measured by keeping the amount of air discharged from the nozzle constant at all times, thereby improving the sizing accuracy of the inner circumferential surface of the workpiece. It's about doing.

(Means for solving the problem) In order to achieve the above object, the solution means of the present invention includes a cylindrical tool body that is rotatably and reciprocally movable, and a tool body that is fitted into the tool body so that it can move forward and backward. The honing tool is equipped with a honing tool that is provided with a cone rod that has been honed, and a honing stone that is expanded radially outward by the forward movement of the cone rod and hones the inner peripheral surface of the workpiece. A honing device is assumed to be equipped with a nozzle connected to an in-process air gauge that blows air toward the inner peripheral surface of the workpiece. In this honing device, a brush that comes into contact with the nozzle of the tool body and the honing stone is provided at a pull-up position when the honing tool is extracted from the workpiece.

(Function) With the above configuration, in the present invention, the honing stone rotates and expands outward in the radial direction due to the rotation and reciprocating movement of the tool body of the honing tool and the forward movement of the cone rod. The circumferential surface is honed. Furthermore, during this honing process, air is blown toward the inner peripheral surface of the workpiece from a nozzle connected to the in-process air gauge installed on the side of the honing stone of the tool body, and the discharge pressure of the air at this time is detected. Then, the honing condition of the inner peripheral surface of the workpiece is measured using an in-process air gauge.

At this time, since a brush is provided at the pull-up position when the honing tool is pulled out from the workpiece, which comes into contact with the nozzle of the tool body and the honing stone, the honing tool can be rotated after machining is completed. By moving the nozzle backward, abrasive powder and chips adhering to the air outlet of the nozzle are removed by the sliding action of the brush and do not accumulate on the air outlet, and furthermore, they are prevented from accumulating in the air outlet due to friction during machining. The peeled abrasive powder is also removed from the outer peripheral surface of the honing stone by the sliding action of the brush, so that the grindstone is not clogged. Therefore, the amount of air discharged from the nozzle is always kept constant, and the machining condition of the inner peripheral surface of the workpiece can be measured with high accuracy, thereby improving the sizing accuracy of the inner peripheral surface of the workpiece. Become.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a honing device according to an embodiment of the present invention, in which 1 is a honing tool attached to a rotating main shaft (not shown) on the main body of the honing device and rotated by the operation of the main shaft, and 2 is a honing tool on the main body of the honing device. A tool guide member W is fixed to the honing tool 1 and guides the honing tool 1 by vertically fitting it into the insertion hole 2a, and W is a cylindrical workpiece having a hole _W1 set on the processing table A.

The honing tool 1 includes a cylindrical tool body 3 that is rotatable and reciprocally movable by the operation of the rotating main shaft. 3a is formed, and on the tip side (lower end side), as shown in FIG.
The openings 3b, 3b, . . . are opened at positions dividing the circumference into four equal parts.

Further, in the fitting hole 3a of the tool body 3, a cone rod 4 having a tapered portion 4a near the tip (lower end) is inserted into the fitting hole 3a by the action of pressure oil supplied from a hydraulic source (not shown), for example. It is fitted so that it can move forward and backward in the direction of the center line of the hole.

Furthermore, in each opening 3b of the tool body 3, a grindstone holder 5 having an inclined surface portion 5a corresponding to the shape of the tapered portion 4a of the cone rod 4 is disposed so as to be movable in the radial direction. For example, a diamond grindstone 6 facing the outside through each opening 3b of the tool body 3 is fixed to the opposite side of the inclined surface portion 5a. Each diamond grindstone 6 is expanded radially outward by pressing the inclined surface portion 5a of each grindstone holder 5 with its tapered portion 4a as the cone rod 4 moves forward. The inner peripheral surface of the workpiece W is honed.

The tool body 3 also has the insertion hole 3a.
Two air supply passages 7, 7 extending vertically along are formed in point-symmetrical positions, and the lower ends of each are connected to the adjacent openings on the side of the diamond grinding wheel 6 of the tool body 3, that is, in the vicinity of the lower end of the tool body 3. Part 3
b and 3b are connected to a nozzle 7a formed by opening an air discharge port on the outer peripheral surface of the tool body 3, while the upper end of each air supply passage 7 is connected to an in-process air gauge equipped with an air supply source (not shown). 8
connected to the above air supply source. Then, the air supplied from the air supply source to each air supply passage 7 is applied to the workpiece W through the air discharge port of each nozzle 7a.
Spray toward the inner peripheral surface, and each nozzle 7 at this time
By detecting the discharge pressure of air discharged from the in-process air gauge 8, the honing state of the inner circumferential surface of the workpiece W is measured.

On the other hand, as a feature of the present invention, as shown in FIG. A plurality of (four) brushes 9, 9... each having a large number of bristles 9a, 9a... with their tips facing 2a cover a circumference of 4.
The bristles 9 of each brush 9 are arranged at equally divided positions.
a, 9a...The tips are always brought into contact with the outer peripheral surface of the tool body 3 so as to contact the air outlet of each nozzle 7a and the outer peripheral surface of the diamond grindstone 6.

Next, to explain the procedure for honing the workpiece W using the honing device according to the present embodiment configured as described above, first, by operating the main rotation shaft of the honing device, the honing tool 1 is While rotating, the main body 4 is guided by the tool guide member 2 and reciprocates in the vertical direction. At the same time, the cone rod 4 moves forward (moves downward) and presses each grindstone holder 5 with its tapered portion 4a, thereby expanding each diamond grindstone 6 outward in the radial direction.
The inner circumferential surface of the workpiece W set in the honing process is performed. Furthermore, during this honing process, air is supplied from the air supply source to each air supply passage 7, and the supplied air is blown toward the inner circumferential surface of the workpiece W from the air outlet of each nozzle 7a. It will be done. Then, the air discharge pressure at this time is detected by the in-process air gauge 8, and the honing state of the inner peripheral surface of the workpiece W is measured.

In this case, the tool guide member 2 is provided with a plurality of brushes 9, 9... each having a large number of bristles 9a, 9a... implanted in contact with the air outlet of each nozzle 7a and the outer peripheral surface of each diamond grinding wheel 6. Therefore, by moving the honing tool 1 backwards (upwards) while rotating after the completion of machining, the abrasive powder and chips adhering to the air outlet of each nozzle 7a are removed from each of the brushes 9. hair 9a, 9
The abrasive powder removed by the sliding contact action of the brushes 9 and 9 does not accumulate on the air outlet, and the abrasive powder peeled off due to friction during machining is also removed by the bristles 9a, 9 of each brush 9.
The diamond grinding wheels 6 are removed from the outer circumferential surface of the diamond grinding wheels 6 by the sliding action of a, so that each grinding wheel 6 is not clogged. Therefore, even when using a water-soluble coolant which generally has poor cleaning ability, abrasive powder and chips can be reliably removed by the sliding action of the bristles 9a, 9a, . . . of each of the brushes 9. Therefore, the amount of air discharged from the discharge port of each nozzle 7a is always kept constant, and the machining condition of the inner circumferential surface of the workpiece W can be measured with high precision. It is possible to improve dimensional accuracy.

(Effects of the invention) As explained above, according to the invention, there is a nozzle connected to the in-process air gauge that blows air toward the inner peripheral surface of the workpiece on the side of the honing wheel of the tool body of the honing tool. In the provided honing device, a brush that comes into contact with the nozzle of the tool body and the honing stone is provided at the pull-up position when the honing tool is removed from the workpiece, so that the brush does not stick to the nozzle of the tool body or the honing stone. The abrasive powder and chips are reliably removed by moving the honing tool backwards while rotating after the machining is completed, so that they do not accumulate in the nozzle or clog the grindstone. Therefore, even when using a water-soluble coolant, which generally has poor cleaning ability, abrasive powder etc. can be reliably removed by the sliding action of each of the brushes, and the air discharge from the nozzles can be reliably removed. Since the amount is always kept constant, the machining state of the inner circumferential surface of the workpiece W can be measured with high accuracy, and thereby the sizing accuracy of the inner circumferential surface of the workpiece W can be improved.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of a honing device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the - line in FIG. 1, and FIG. 3 is a - in FIG. 1.
FIG. 1... Honing tool, 2... Tool guide member, 3... Tool body, 4... Cone rod,
6...Diamond whetstone, 7a...Nozzle, 8...
...In-process air gauge, 9...Brush, W...
...Workpiece.

Claims (1)

[Scope of utility model registration request] A cylindrical tool body that is rotatably and reciprocally movable; a cone rod that is fitted into the tool body so that it can move forward and backward; A honing device is provided with a nozzle connected to an in-process air gauge that blows air toward the inner circumferential surface of the workpiece, on the side of the honing stone of the tool body of the honing tool, which is equipped with a honing stone for honing the workpiece. It's hot,
A honing device equipped with an air gauge, characterized in that a brush that comes into contact with a nozzle of the tool body and a honing stone is provided at a pulled-up position when the honing tool is extracted from a workpiece.