JPH081507A - Honing machine - Google Patents

Abstract

PURPOSE:To facilitate changing a grinding wheel to improve the contact of it with an article to be worked. CONSTITUTION:A grinding wheel holder 9 holding a grinding wheel 8 is rotated integratedly with the rotation of a rotation head 4 to perform polishing by the grinding wheel 8. Changing the grinding wheel holder 9 can be simplified by making it have structure wherein a shaft part 9b is inserted into a fitting cylinder 20 to be fitted to the rotation head 4. A circular cone-shaped cam member 17 is fitted to a vertically moving shaft 15 to concurrently push out all the grinding holder 9 by the cam member 17 to contact the grinding wheel 8 with an article to be worked. Continuous pushing force by the cam member 17 well contacts the grinding wheel 8 with the article to be worked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a honing machine which grinds an inner surface of a cylindrical structure such as a cylinder used in a large prime mover such as a ship engine.

[0002]

2. Description of the Related Art A cylindrical structure as described above is formed into a predetermined diameter and shape, and then the inner surface is processed by a honing machine. A honing machine that performs this processing has a plurality of grindstone holders holding a grindstone attached to a rotating head, and inserts the rotating head into a cylindrical structure that is a workpiece and rotates the grindstone holder. It is also used to rotate the grindstone to polish the inner surface. In this polishing, it is necessary to prevent abrasion of the grindstone and a loss of contact with the inner surface of the workpiece. For this reason, conventionally, a spring (or a single spring) is provided at each mounting portion or the whole of the grindstone holder in the rotary head, and the spring urges the grindstone holder in the advance direction.
It had a structure to ensure the corrosion of the grindstone with the inner surface of the workpiece.

[0003]

However, in the conventional honing machine, a spring is arranged for each of the grindstone holders, and each spring or a single spring urges the grindstone holder. It is necessary to attach the grindstone holder so that the two are engaged. For this reason,
Attachment and removal of the whetstone at the time of replacement is troublesome. Also,
When the urging force of the spring causes the grinding wheel to set, the urging force is weakened, so that all of the grindstone holders cannot be urged with a uniform spring force all the time, resulting in variation in the polishing force. Moreover, when only the grindstone of a specific grindstone holder wears, the grindstone must be replaced each time the wear occurs, and the replacement frequency increases and workability also deteriorates. Further, when the wear of the grindstone progresses beyond a certain level, the urging force of the spring cannot follow this, and the contact force of the grindstone with the workpiece is weakened, so that there is a problem that the polishing force is rapidly reduced. Was.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. It is possible to easily replace a grindstone holder, to urge all the grindstone holders with an equal force, and to further reduce the amount of wear of the grindstone. It is an object of the present invention to provide a honing machine capable of maintaining a contact force with a workpiece independently of the honing machine.

[0005]

A honing machine of the present invention includes a rotary drive source, an operating member that is connected to a rotary shaft of the rotary drive source and that rotates and a piston moves in an axial direction, and an operating member of the operating mechanism. A shaft connected to a piston and reciprocating in the axial direction; a rotary head connected to the main body of the actuating mechanism and having a plurality of grindstone holders holding grindstones mounted so as to be movable back and forth in a direction substantially orthogonal to the axial direction; A cam member attached to the shaft for abutting the grindstone holder to advance the grindstone holder by moving the shaft in one direction; and a spring for urging the shaft in a direction opposite to the operating direction of the operating member. Characterize.

[0006]

In the above arrangement, the rotary head is rotated by inserting the rotary head into the workpiece and driving the rotary drive source. This rotation rotates the grindstone holder integrally, and the grindstone polishes the inner surface of the workpiece.
On the other hand, the actuating member moves the shaft by moving the piston in the axial direction. A cam member is attached to this shaft, and all of the shafts come into contact with the inner surface of the workpiece with an equal force by the movement of the shaft.

Here, by setting the piston of the operating member to a biasing state of constantly moving in the axial direction, the grindstones of the respective grindstone holders are always in contact with the inner surface of the workpiece through the shaft and the cam member. Therefore, regardless of the wear amount of the grindstone, the grindstone can be brought into contact with the inner surface of the workpiece, and the polishing can be performed smoothly. Also, each grinding wheel holder should be attached to the rotating head so that it comes into contact with the cam member, and the attachment and detachment structure becomes simple,
The replacement can be performed easily and quickly.

[0008] In the honing machine of the present invention,
A plurality of mounting cylinders extending in a direction substantially perpendicular to the axial direction are radially mounted on the rotating head, and a shaft part inserted into the mounting cylinder is provided on a fixed grindstone holder, so that the shaft part is inserted into the mounting cylinder. The whetstone holder can be attached and detached only by pulling out. For this reason, the attachment of the grindstone holder can be easily performed.

[0009]

FIG. 1 shows an entire configuration of an embodiment of a honing machine according to the present invention. The honing machine includes a rotary drive source unit 3 that moves up and down along guide pipes 2 and 2.
And a tensioner 6 and a rotary head 4 which are connected to the lower part of the rotary drive source unit 3, and the rotary head 4 is lowered to rotate the rotary head 4 into a cylindrical workpiece 5.
Enter the inside and polish the inner surface. An electric motor, a pneumatic motor, or the like is used as the rotary drive source 1. On the other hand, the rotary head 4 has four grindstone holders 9 having grindstones 8 radially attached thereto. The number of the whetstone holders 9 is 4
Not limited to books, three to eight can be arbitrarily selected. The rotary head 4 and the rotary drive unit 3 are connected by connecting a connecting pipe 10 below the tensioner 6 and extending a universal part 11 from the upper part of the rotary head 4. This is performed by butting the coupling plates 10a and 11a at the opposite end of the connector 11 with a bolt or the like. As a result, as will be described later, the rotary drive source 1 rotates the tensioner 6 so that the rotary head 4 rotates integrally.

FIG. 2 shows an operating member 7 provided inside the tensioner 6. In FIG. 1 and FIG.
Is a support tube supported by the rotary drive source unit 3, and the rotary shaft 6a of the rotary drive source 1 is inserted from the upper end portion. In the support tube 12, the rotary shaft 6a of the rotary drive source 1 is
Is provided. The rotating member 13 is connected to the rotating shaft 6 via an engaging mechanism (not shown) such as a key and a key groove or an incising tooth that meshes with each other.
The rotational force is transmitted from a. The operating member 7 is attached to the lower end surface of the rotating member 13 and rotates integrally with the rotating member 13.

The operating member 7 is operated by fluid pressure, and in this embodiment, an air cylinder is used.
Hereinafter, in this embodiment, the operating member 7 will be described as the air cylinder 7. The air cylinder 7 is a single-acting cylinder, and the piston 7b moves in the axial direction (downward in the illustrated example) by introducing air into the upper portion of the cylinder tube 7a which is the main body. Air inlet 7 of air cylinder 7
The opening c is open on the upper surface, and an air inlet 14 formed on the side surface of the rotating member 13 communicates with the air inlet 7c. The air inlet 14 is a rotary joint and is connected to an air supply source (neither is shown). As a result, even if the rotating member 13 rotates, the continuation of the air introduction port 14 to the air supply source is maintained, and air can be supplied to the air cylinder during rotation.

FIG. 3 shows the internal structure of the rotary head 4. The rotary head 4 is formed in a cylindrical shape extending in the axial direction (vertical direction in the illustrated example), and a shaft 15 penetrates the inside thereof in the axial direction. An upper portion of the shaft 15 extends upward through the universal portion 11 and the connecting pipe 10, and an upper end portion thereof is connected to the piston 7b of the air cylinder 7. Thus, the shaft 15 moves downward in the rotary head 4 due to the downward movement of the piston 7b. Reference numeral 16 denotes a spring for urging the shaft 15 in the opposite direction (that is, upward) with respect to the operation of the air cylinder 7. Therefore, the shaft 15 moves downward due to the operation of the air cylinder 7 by the air supply, but when the air supply to the air cylinder 7 is stopped, the shaft 15 moves upward due to the urging force of the spring 16.

The shaft 15 has cam members 17, 17.
Are provided at two locations above and below. Cam members 17, 17
Is formed in a conical shape that continuously expands upward, and acts to advance the grindstone holder 9 by moving the shaft 15 downward as described later.

The grindstone holder 9 has a holder 9a extending in the axial direction of the rotary head 4, that is, the vertical direction, and shafts 9b, 9b provided in a direction substantially perpendicular to the axial direction from the holder 9a. doing. As shown in FIG. 4, the holder 9a has a groove 9c formed in the axial direction.
The grindstone 8 is inserted into and the screw 19 is tightened to hold the grindstone 8. The shaft portions 9b, 9b are provided for attaching the grindstone holder 9 to the rotary head 4.

The structure for attaching the grindstone holder 9 to the rotary head 4 will be described below with reference to FIGS. In this case, as shown in FIG. 4, mounting cylinders 20, 20,.
Is provided. The upper and lower mounting cylinders 20, 20 located in the axial direction of the rotary head 4 are shaft parts 9 b, 9 b of the grindstone holder 9.
, Four pairs of mounting cylinders 20 located in the radial direction of the rotary head 4 are radially arranged with respect to the rotary head 4. As shown in FIG.
The shaft portions 9b of the grindstone holders 9 are inserted so as to penetrate, and each of the grindstone holders 9 is attached by inserting the shaft portions 9b. Therefore, the grindstone holder 9 has its shaft portion 9b mounted on the mounting cylinder 2
Since it can be mounted simply by inserting the whetstone 0, the mounting becomes extremely easy, and the replacement of the grindstone holder 9 can be easily performed.

The end of the shaft 9b inserted into the mounting tube 20 is in contact with the cam member 17, whereby the shaft 15
With the downward movement, the grindstone holder 9 of the cam member 17 advances in a direction substantially orthogonal to the axial direction, and the grindstone 8 comes into contact with the inner surface of the workpiece 5. In FIG. 3, reference numeral 21 denotes a roller attached to the insertion end of the shaft portion 9 b of the grinding wheel holder 9, which is in rolling contact with the cam member 17 and acts so as to smoothly advance the grinding wheel holder 9.

Next, the operation of this embodiment will be described. First, a plurality of grinding wheel heads 9 are mounted on the rotating head 4 by inserting the shaft portions 9 b of the grinding wheel holders 9 into the corresponding mounting cylinders 20 of the rotating head 4. Then, as shown in FIG. 1, the rotating head 4 is connected to the connecting cylinder 10 extending from the air cylinder 7 by bringing the coupling plates 10a and 11a into contact with each other and tightening bolts or the like. In this state, the rotary drive source unit 3 is lowered to insert the rotary head 4 into the cylindrical workpiece 5.

Next, air is supplied to the air cylinder 7 to move the shaft 15 downward. As a result, the cam member 17 simultaneously pushes out all the grindstone holders 9, so that the grindstone holder 9 advances, and the grindstone 8 contacts the inner surface of the workpiece 5. Then, by driving the rotation drive source 1, the air cylinder 7 is rotated, and the grindstone holder 4 connected to the air cylinder 7 is rotated. Thereby, the grindstone 8 polishes the inner surface of the workpiece 5. When the grindstone 8 is worn during the polishing and the contact with the inner surface of the workpiece 5 becomes insufficient,
By supplying air to the air cylinder 7 and moving the shaft 15 downward, the pushing force by the cam member 17 is increased. As a result, the grindstone holder 9 advances,
The grindstone 8 is in good contact with the workpiece 5. In such a configuration, even if the grindstone 8 is worn, the grindstone holder 9 can be advanced in accordance with the amount of wear, so that the contact state with the workpiece 5 can be maintained in a favorable state, and the polishing can be reliably performed. ,
Moreover, it can be performed continuously and quickly. Further, since the cam member 17 simultaneously advances all the grindstone holders 9 by the same amount, all the grindstone holders 9 are biased by an equal force. Thereby, all the grindstones 8 come into contact with the workpiece 5 with a uniform contact force, so that polishing with a uniform polishing force becomes possible.

The above-described polishing is performed in the order of rough polishing and finish polishing, and it is necessary to replace the grindstone 8 with a grain size corresponding to each polishing step. In this case, the grindstone holder 9 having the grindstone 8 is attached to the rotary head 4, but this attachment only needs to insert the shaft portion 9b into the mounting cylinder 20, and the exchange of the grindstone holder 9 is extremely easy. Moreover, it can be performed quickly.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, as the operating member 7,
An actuator other than an air cylinder can be used, and a spring driven hydraulic cylinder can be selected as this actuator. In the present invention, the axial movement is vertical movement, but may be oblique or horizontal movement.

[0021]

According to the present invention, a cam member is attached to a shaft which moves in the axial direction, and all the grindstone holders are simultaneously advanced by the cam member, so that a uniform urging can be performed and all the grindstones can be uniformly processed. Can be contacted. Therefore, it is possible to perform polishing without variation. Also, even if the grindstone is worn by polishing, it can be brought into good contact between the grindstone and the workpiece only by operating the operating member and moving the shaft in the axial direction, thereby enabling continuous polishing. Thus, rapid processing becomes possible. Further, according to the present invention, since the shaft portion of the grindstone holder is inserted into the mounting cylinder of the rotary head, the grindstone holder can be easily mounted and easily replaced.

[Brief description of drawings]

FIG. 1 is a front view showing an entire embodiment of the present invention.

FIG. 2 is a sectional view of a tensioner and an operating member.

FIG. 3 is a sectional view of a rotary head.

FIG. 4 is a perspective view of a rotary head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotation drive source 3 Rotation drive source unit 4 Rotary head 6 Tensioner 7 Working member 8 Grindstone 9 Grindstone holder 15 Shaft 16 Spring 17 Cam member

Claims (2)

[Claims] 1. A rotary drive source, an operating member that is connected to a rotary shaft of the rotary drive source to rotate and a piston moves in an axial direction, and a shaft that is connected to the piston of the operating member and reciprocates in an axial direction. A rotary head having a plurality of grindstone holders connected to the main body of the actuating member and holding grindstones so that the grindstone holders can move back and forth in a direction substantially orthogonal to the axial direction; A honing machine, comprising: a cam member that advances the grindstone holder by movement in one direction; and a spring that biases the shaft in a direction opposite to the operating direction of the operating member. 2. The rotary head has a plurality of mounting cylinders extending in a direction substantially orthogonal to the axial direction in a radial shape, and the grindstone holder has a shaft portion to be inserted into the mounting cylinder and the shaft. The honing machine according to claim 1, wherein an insertion end portion of the portion abuts on the cam member.