JP4981861B2 - Multistage expansion honing equipment - Google Patents

Description

  The present invention relates to a multistage expansion honing apparatus mainly used for honing processing of an engine cylinder block.

  In a conventional multistage expansion honing apparatus, it is common to create a surface shape using two types of rough and finished grindstones in honing of a cylinder block related to an engine. However, when this conventional method is used, the properties of the completed surface are not stable, and it has become difficult to meet recent exhaust gas regulations that have become stricter.

  The oil replenishment method for maintaining proper lubrication on the piston sliding surface is the key to reducing the amount of unwanted combustion exhaust gas during engine operation and continuous operation. As a method to achieve both, after honing with roughing and finishing grindstones, further honing with superfinishing grindstone and deburring finishing grindstone, etc. It is becoming.

  In the present invention, in addition to the roughing grindstone and the finishing grindstone as described above, a further fine honing process using a superfinishing grindstone and a deburring finishing grindstone can be performed by a single multi-stage expansion honing device. It is what.

Japanese Patent Publication No. 61-44630

  Japanese Patent No. 1376703 by the same inventor is already known as a grindstone expanding device in honing. However, in the above-mentioned conventional technology, it is possible to expand in two stages of roughing and finishing, but since more types of wheels (fine finishing wheels, super finishing wheels, etc.) cannot be expanded, there are many more There is a problem that the expansion processing operation cannot be performed by one multi-stage expansion honing device using the type of grindstone.

  The present invention enables further finishing, deburring of a ground surface, and the like with a grindstone having various properties in order to construct a more stable surface texture. The mechanism for expanding many of these grindstones has a complicated structure and has a problem that it is difficult to realize the multistage expansion honing device itself in terms of strength.

  The present invention makes it possible to perform further honing with a single multi-stage expansion honing device in addition to such a roughing grinding wheel and finishing grinding wheel, using a super finishing grinding stone and a deburring finishing grinding wheel. It is.

  That is, in order to optimally manage the oil consumption in the honing process of the cylinder block of the engine, it is necessary to keep the surface roughness of the surface in a proper state. Provided is a multi-stage expansion honing device that needs to be selected and used in multiple stages to create a rough shape on the surface, and that can expand a grindstone in three stages or more with one apparatus. . Moreover, in a multistage expansion honing apparatus, the apparatus which replaces the honing head using a multistage expansion mechanism easily is provided.

In claim 1, in the honing process of the cylinder block of the engine, in order to reduce the oil consumption when the piston slides with respect to the engine cylinder, one honing head is used in order to keep the surface rough shape in an appropriate state. From (11), three or more types of grindstones, to which a superfinishing grindstone (90) or a deburring finish grindstone (91) is added in addition to the roughing grindstone (13) and the finishing grindstone (15), are appropriately selected. The multi-stage expansion mechanism has a cam for projecting the grindstone holder in the slit-like operation hole (12) of the honing head (11). As the mechanism, an expansion shaft cam (21) and an expansion plate cam (63) are arranged, and the honing head (11) is provided with the slit-shaped operation. As the hole (12), both the slit-shaped operation holes (12) of the grindstone holder protruding and stored by the movement of the expansion shaft cam (21) and the grindstone holder protruding and stored by the movement of the expansion plate cam (63) are used. Are engraved in the radial direction .

According to claim 2 , in the multistage expansion honing device according to claim 1, an expansion shaft cam (21) is fitted into the honing head (11), and a plurality of expansion shaft cams (21) are provided. An expansion plate cam (63) constituted by a plate is fitted in the groove so as to be protruded and housed so as to have a double structure.

According to claim 3 , in the multistage expansion honing device according to claim 1, a piston for operating the expansion shaft cam (21) and a piston for operating the expansion plate cam (63) are disposed in the hydraulic cylinder case (3). Are juxtaposed.

According to a fourth aspect of the present invention, in the multistage expansion honing apparatus according to the third aspect, an expansion shaft cam (21) is operated inside the multistage expansion honing apparatus from the hydraulic cylinder case (3) to the honing head (11). The connecting portion and the connecting portion for operating the expansion plate cam (63) are arranged in a double shaft structure.

According to claim 5 , in the multi-stage expansion honing device according to claim 4, an intermediate for avoiding interference between the expansion shaft cam (21) and the expansion plate cam (63) inside the hydraulic cylinder case (3). A positioning mechanism is provided.

According to claim 6 , in the multistage expansion honing apparatus according to claim 1, the multistage expansion honing apparatus can be bent between the hydraulic cylinder case (3) and the honing head (11). The universal joint portion is configured.

In a seventh aspect of the present invention, in the multi-stage expansion honing device according to the first aspect, a ball joint portion for detaching a portion of the expansion plate cam (63) and an expansion shaft cam so that the honing head (11) can be attached and detached. A ball joint portion for detaching the portion (21) is provided.

In claim 8 , in the multistage expansion honing device according to claim 7, a detachable lever for detaching the honing head (11) is disposed so as to protrude from the outside of the multistage expansion honing device. It is.

  In claim 1, in the honing process of the cylinder block of the engine, in order to reduce the oil consumption when the piston slides with respect to the engine cylinder, one honing head is used in order to keep the surface rough shape in an appropriate state. Then, in addition to the roughing grindstone (13) and the finishing grindstone (15), three or more kinds of grindstones to which a superfinishing grindstone (90) or a deburring finishing grindstone (91) is added are appropriately selected. It can be extended in multiple stages, and after honing with a roughing grindstone and a finishing grindstone, it is further highly accurate with a superfinishing grindstone and a deburring finish grindstone. By performing the honing process, plateau honing with a high degree of perfection has become possible.

  Further, the expansion shaft cam (21) and the expansion plate cam (63) are arranged as a cam mechanism for causing the grindstone holder to protrude in the slit-like operation hole (12) of the honing head (11). Therefore, the replacement work of more grindstones in the honing process can be performed more quickly.

  The honing head (11) is housed as a slit-like operating hole (12) by a grindstone holder that projects and accommodates by the movement of the expansion shaft cam (21) and a movement of the expansion plate cam (63). Since both slit-shaped operating holes (12) with the grindstone holder are engraved in the radial direction, the slit for the grindstone holder that is projected by the extended shaft cam (21) inside one honing head (11) It is possible to form both the slit-like operating hole (12) and the slit-like operating hole (12) for the grindstone holder that is projected by the expansion plate cam (63). I was able to put it together.

According to claim 2 , in the multistage expansion honing device according to claim 1, an expansion shaft cam (21) is fitted into the honing head (11), and a plurality of expansion shaft cams (21) are provided. Since the expansion plate cam (63) constituted by a plate is fitted in the groove so as to be protruded and retractable, a double structure is formed, so that one expansion shaft cam (21) and the expansion plate cam (63) overlap each other. It is possible to expand three or more types of grindstones.

According to claim 3 , in the multistage expansion honing device according to claim 1, a piston for operating the expansion shaft cam (21) and a piston for operating the expansion plate cam (63) are disposed in the hydraulic cylinder case (3). Because of this, the piston for the expansion shaft cam (21) and the piston for the expansion plate cam (63) were both arranged in a single cylinder. It is.

According to a fourth aspect of the present invention, in the multistage expansion honing apparatus according to the third aspect, an expansion shaft cam (21) is operated inside the multistage expansion honing apparatus from the hydraulic cylinder case (3) to the honing head (11). Since the connecting portion and the connecting portion for operating the expansion plate cam (63) are arranged in a double shaft structure, two types of connecting rod systems are required. In the configuration, it is possible to arrange two connecting rod systems.

According to a fifth aspect of the present invention, in the multistage expansion honing device according to the fourth aspect, intermediate positioning for avoiding interference between the expansion shaft cam (21) and the expansion plate cam (63) is provided inside the hydraulic cylinder case (3). Since the mechanism is provided, by providing a structure that can be held in the middle of pulling, it is possible to expand another grinding wheel, and it is possible to avoid interference between the expansion shaft cam (21) and the expansion plate cam (63). It has become.

According to claim 6 , in the multistage expansion honing apparatus according to claim 1, the multistage expansion honing apparatus can be bent between the hydraulic cylinder case (3) and the honing head (11) at two locations. Since the joint part is configured, the overall length is long, and the flexibility of bending the grinding wheel and grinding wheel holder part along the inner surface of the cylinder in the state of being inserted into the cylinder liner is provided by two universal joint parts. It is something that can be obtained.
As a result, the grindstone holder and the grindstone can be in close contact with the inner surface of the cylinder liner in a flexible manner, and more reliable plateau honing is possible.

In a seventh aspect of the present invention, in the multi-stage expansion honing device according to the first aspect, a ball joint portion for detaching a portion of the expansion plate cam (63) and an expansion shaft cam so that the honing head (11) can be attached and detached. Since the ball joint part that detaches the part (21) is provided, it becomes possible to easily remove and attach the hydraulic cylinder case (3) side and the honing head (11) side at the ball joint part. The honing head can be easily replaced and maintained.

In the eighth aspect of the present invention, in the multi-stage expansion honing apparatus according to the seventh aspect, the detaching lever for detaching the honing head (11) is disposed so as to protrude from the outside of the multi-stage expansion honing apparatus so as to be detachable. By simply sliding the detachable lever from the outside of the multistage expansion honing device, it is possible to detach the ball joint part and detach the connecting rod part with a double shaft configuration. The head (11) can be inspected, repaired, and repaired on the grindstone and the grindstone holder.

1 is an overall side sectional perspective view of a multistage expanded honing apparatus according to an embodiment of the present invention. The expansion side cross-section perspective view of the sheikk side of a multistage expansion honing apparatus. The expansion side cross-section perspective view of the center part of a multistage expansion honing apparatus. The expansion side cross-section perspective view of the honing head side of a multistage expansion honing apparatus. The whole perspective view of a honing head part. The whole perspective view of the state which fitted the expansion plate cam inside the expansion shaft cam. The perspective view of the state which removed the expansion shaft cam and the expansion plate cam. The side cross-sectional perspective view of the state which fitted the expansion plate cam inside the expansion shaft cam. The side sectional perspective view of an extended shaft cam and a grindstone holder for roughing. The side cross-sectional perspective view of the part of the grindstone holder for rough processing in the state where the expansion shaft cam slid. Front sectional drawing of the part of a honing head, an expansion shaft cam, and an expansion plate cam.

  The present invention relates to a multistage expansion honing device for honing an inner surface of a cylinder or cylinder liner of an engine cylinder block. Previously, Japanese Patent Publication No. 61-44630 of the same inventor is publicly known. However, the technical content described in Japanese Patent Publication No. 61-44630 has a problem that only two types of grindstones such as a roughing grindstone and a finishing grindstone can be expanded. In the present invention, one or two kinds, and up to four kinds of grindstones can be expanded individually or in combination, and a maximum of eight kinds of expansion patterns are possible.

  In the technique described in Japanese Examined Patent Publication No. 61-44630, a screw is used to connect the expansion shaft, but it takes a lot of time to attach and detach the honing head. In the present invention, by improving this point and adopting a split collet having two ball joints, one-touch exchange is possible.

  An embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIGS. 1 to 4, (1) is an elongated honing shaft. That is, it has a shank (2) connected to the rotational drive part of the honing machine tool at one end. The shenk (2) is provided so as to project integrally to the honing machine side from the cylindrical hydraulic cylinder case (3), which is configured on the multistage expansion honing device side. On the outer periphery of the hydraulic cylinder case (3), a rotary valve (4) is fitted in a watertight manner while being held by a thrust bearing (5). The rotary valve (4) is fixed to the non-rotating side of the honing machine tool, and the side of the shenk (2) and the hydraulic cylinder case (3) rotates with respect to the rotary valve (4).

  A joint portion (6) is screwed to the other end of the hydraulic cylinder case (3). The joint portion (6) is connected to one end of the intermediate shaft (8) by a universal joint (7). A universal joint (7) that enables bending of the multistage expansion honing device is interposed between the joint portion (6) and the intermediate shaft (8). Thereby, it is possible to bend about a certain axis. In order to absorb the bending by the portion of the universal joint (7), between the first piston rod (40) and the second piston rod (42) and the head (45) of the joint cylinder shaft (44), The portion of the spherical head (45) can be bent.

  A joint portion (10) is connected to the other end of the intermediate shaft (8) by a further universal joint (9). The universal joint (9) is also provided with a configuration that allows the honing head (11) to be bent with respect to the axial center. Further, a split collet-shaped ball joint (59, 58, 85) is provided in the portion to enable the honing head (11) to be attached and detached.

  The ball joint (85) is configured as a split collet for connecting and detaching the connecting cylinder shaft (55) and the connecting rod (51). The lock cam shaft (84) is inserted into the ball joint (85) to be slidable, and the tip of the lock cam shaft (84) is inserted into the ball joint (85). The ball joint (85) is locked at the same time as being expanded to form a connected state. Conversely, the lock cam shaft (84) is retracted from the ball joint (59), so that the ball joint (85) is unlocked. It can be contracted and can be detached.

  By operating the ball joint (85) of the lock cam shaft (84), the detachment lever (81) of the expansion plate cam (63) is inserted from the outside of the intermediate shaft (8) at the time of detachment. By the sliding operation, the lock cam shaft (84) inside the connecting cylindrical shaft (55) is slid in the axial direction so that the ball joint (85) can be attached and detached.

  Similarly, the ball joint (58/59) is contracted / expanded with respect to the joint body (23), whereby the second connecting rod (22) on the side of the expansion shaft cam (21) and the joint shaft (60). The split collet that enables desorption between the two is configured. The ball joint (58/59) connects the ball joint (58/59) and the joint shaft (60) via the joint body (23), and the extended shaft cam (21) is also removed by removing this portion. An insertion type detachable lever (82) that is detachable is provided. By sliding the detachable lever (82) in the axial direction, the outer detachable lever cylinder shaft (83) slides in the axial direction, and the ball joint (58, 59) is moved relative to the joint body (23). The ball joint (58/59) can be attached to and detached from the joint body (23).

  In the embodiment, the detaching lever (81) for the expansion plate cam (63) and the detaching lever (82) for the expansion shaft cam (21) are configured separately from each other. When the honing head (11) is attached / detached, the extension shaft cam (21) and the extension plate cam (63) must be attachable / detachable at the same time. It is also possible to adopt a configuration in which the operation can be performed integrally.

  The connecting portion between the connecting rod (51) to the extension plate cam (63) and the connecting cylinder shaft (66) of the extension shaft cam (21) is connected as a structure for screwing and removing the screw cylinder. Yes. Further, the connection between the connecting rod (51) and the connecting rod (62) for the expansion plate cam (63) is performed by a thin screw shaft (80).

  A honing head (11) constituting a main part of the present invention is detachably connected to the joint portion (10).

  A large number of slit-like operating holes (12) are formed radially on the outer periphery of the honing head (11), and a roughing grindstone (13) is held in these slit-like operating holes (12). A roughing grindstone holder (14), a finishing grindstone holder (16) for holding a finishing grindstone (15), a superfinishing grindstone holder (94) for retaining a superfinishing grindstone (90), and a deburring A plurality of pairs of deburring finishing grindstone holders (93) for holding the finishing grindstone (91) are arranged alternately.

  The honing head (11) holds the roughing grindstone (13), the finishing grindstone (15), the superfinishing grindstone (90), the deburring finishing grindstone (91), and the like in the radial direction. It is slidably held. In addition, these roughing grindstone holder (14), finishing grindstone holder (16), superfinishing grindstone holder (94), deburring finishing grindstone holder (93), etc. have a tension spring (17) on the outer periphery. Is wound in a ring shape and urged toward the inner storage side by the diameter reducing action of the honing head (11).

  As shown in FIGS. 5 and 11, the honing head (11) is configured to be detachable from the joint portion (10). FIG. 5 shows a state where the honing head (11) is removed from the joint portion (10). In the embodiment, as shown in FIG. 11, twelve slit-like operation holes (12) are opened in the honing head (11). That is, it is like a slit-like operation hole (12a * 12a * 12b * 12b * 12c * 12c * 12d * 12d * 12e * 12e * 12f * 12f).

  If all 12 grindstone holders are inserted, 12 grindstones can be protruded from the honing head (11). In this embodiment, the extension shaft cam (21) The roughing grindstone (13) and the finishing grindstone (15) can be protruded and stored by sliding in the axial direction, and the superfinishing grindstone (by sliding the expansion plate cam (63) in the axial direction ( 90) and a deburring finish processing grindstone (91) are projected and housed, and a configuration is disclosed in which a total of four kinds of grindstones and grindstone holders can be projected and housed.

  By setting the number of the slit-like operation holes (12) to 16, it is possible to project and store a maximum of 16 kinds of grindstones and grindstone holders. Regardless of the configuration of the present embodiment, the number of the slits of the extension shaft cam (21) and the number of the plates of the extension plate cam (63) are changed, and the extension plate is set inside the slit of the extension shaft cam (21). By putting in and out the plate of the cam (63), it is possible to make it possible to take in and out many types of grindstones and grindstone holders. In the embodiment of FIG. 5, the number of slit-like operating holes (12) in the honing head (11) is twelve, and a ring spring groove (11a) in which a tension spring (17) is fitted on the outer periphery of the twelve. Is configured.

  FIG. 6 shows a state in which the expansion plate cam (63) is fitted inside the expansion shaft cam (21). As shown in FIG. 8, the connection shaft (66) constituting the base portion of the expansion shaft cam (21) and the expansion shaft cam (21) can be screwed and fixed, and the expansion shaft cam (21 ) And the connecting cylinder shaft (66) are removed, an opening is made in the slit portion inside the expansion shaft cam (21), and four pieces are opened from the opening of the slit on the connecting cylinder shaft (66) side. The expansion plate cam (63) of FIG. 7 (a), in which the plate of FIG. 7 is fixedly projected at an interval of 90 degrees, is inserted into the expansion shaft cam (21) of FIG. 7 (b).

  As shown in FIG. 7 (a), the expansion plate cam (63) has two plates (63a, 63a) projectingly arranged at positions facing each other by 180 degrees, and 180 degrees at a position where the phase is changed by 90 degrees. It has a cross-sectional configuration in which the other two plates (63b and 63b) are provided to project at opposite positions. The two plates (63a and 63a) and the two plates (63b and 63b) are used for protruding storage of the superfinishing grindstone (90) or the deburring finishing grindstone (91) in this embodiment. It is.

  As shown in FIG. 7B, in the expansion shaft cam (21), the two plates (63a, 63a) and the two plates (the plate (63a)) of the expansion plate cam (63) every 90 degrees. 63b and 63b) are inserted into the grooves (21a and 21a) and the grooves (21b and 21b) as slit-shaped grooves. Two cam surfaces (21c and 21d) are formed on the outer periphery of the expansion shaft cam (21) between the grooves (21a and 21a) and the grooves (21b and 21b).

  As the cam surfaces (21c and 21d), two cam surfaces are formed at four locations. Therefore, a total of eight cam surfaces are constructed, and if the cam surfaces at positions facing 180 degrees are used, four sets of whetstones and whetstone holders can be protruded and stored, but the roughing whetstone (13) and finish Since the grindstone (15) is a rough grindstone and the load applied is large, in order to increase the pushing force for pushing out the grindstone and the grindstone holder, four cam surfaces every 90 degrees are made the same grindstone and grindstone holder. Thus, two types of protrusion and storage of the roughing grindstone (13) and the finishing grindstone (15) are made possible.

  A configuration for projecting and storing the grindstone holder by sliding the extension shaft cam (21) and the extension plate cam (63) in the axial direction will be described. Since the shapes of the cam surfaces of the extension shaft cam (21) and the extension plate cam (63) are almost the same, in FIG. 9 and FIG. 10, the roughing grindstone (13) and the finish are finished by the extension shaft cam (21). The structure which protrudes the grindstone (15) will be described, and the case of the expansion plate cam (63) will be described as the same structure.

  9 and 10, the roughing grindstone holder (14) and the finishing grindstone holder (16) are provided with concave portions (18) of a certain length at the inner edges thereof and gently positioned at both ends thereof. An expansion shaft cam (21) is formed, which is formed with an inclined triangular peak (19).

  The expansion shaft cam (21) slides in the recess (18) and abuts against the peak (19) to select the roughing grindstone holder (14) or the finishing grindstone holder (16). An expansion shaft cam (21) having a convex portion (20) that protrudes radially is fitted to the center of the honing head (11) in a slidable manner. In addition, a connecting rod (51) is slidably fitted in the joint (10) connected to the honing head (11), and the intermediate shaft is connected to the joint (10). In (8), the second connecting rod (22) is slidably fitted.

  The connecting cylindrical shaft (66) constituting one end of the expansion shaft cam (21) and the joint shaft (60) are connected by a joint portion in which a screw is engraved on the cylindrical shaft, and the joint shaft (60). And the second connecting rod (22) are connected by a joint body (23) and a ball joint (58, 59).

  A hydraulic device (24) is provided in the honing shaft (1). That is, the rotary valve (4) is formed with ports (25, 26, 27, 28) connected to a switching valve (not shown) and circumferential grooves (29, 30, 31, 32). . The hydraulic cylinder case (3) communicates with the first hydraulic cylinder (35) having an oil passage (33/34) communicating with the port (25/26) and the port (27/28). The second hydraulic cylinder (38) having the oil passages (36, 37) is arranged on the same axis while being shielded by the shielding wall (39).

  The first hydraulic cylinder (35) is provided with a first piston (41) fixed to a cylindrical first piston rod (40) slidably fitted to the joint portion (6). . The second hydraulic cylinder (38) has a second piston (42) fixed to a second piston rod (42) slidably fitted to the shielding wall (39) and the first piston rod (40). 43).

  The first piston (41) moves the expansion shaft cam (21) only to the right (one side) and moves the second connecting rod (22) only to the right. It is connected to the connecting rod (22). Specifically, the joint cylinder shaft (44) is screwed to the right end (one end) of the second connecting rod (22). The joint cylinder shaft (44) is inserted into the right end of the first piston rod (40) at the right end thereof to cause interference only when the first piston rod (40) is moved rightward. 42), a spherical head (45) configured to contact the left end (the other end) of 42) and receive a leftward pressing force.

  In such a configuration, the honing shaft (1) rotates by inserting the shank (2) into a chuck connected to the rotation drive unit. At this time, only the rotary valve (4) is prevented from rotating by a fixed portion (not shown), and the hydraulic cylinder case (3), the joint portion (6), the intermediate shaft (8), the joint portion (10), the honing head (11), and this The roughing grindstone holder (14) and the finishing grindstone holder (16) that are held in rotation rotate.

  Then, when hydraulic pressure is applied to the ports (26, 28), as shown in FIG. 2, the first piston rod (40) is maintained in a state of sliding to the left (the other side), and the second piston (43 ) And the second piston rod (42) slide to the left to apply a leftward force to the head (45) of the joint cylinder shaft (44). As a result, the second connecting rod (22) and the expansion shaft cam (21) slide to the left, and the convex portion (20) of the expansion shaft cam (21) is the peak portion of the roughing grindstone holder (14). Abuts on (19). Accordingly, only the roughing grindstone holder (14) protrudes in the radial direction, whereby roughing is performed.

  Next, when hydraulic pressure is applied to the ports (25, 27), the second piston rod (42) slides to the right to open the joint cylinder shaft (44), and the first piston (41) and the first piston rod (40) slides to the right and presses the head (45) of the joint cylinder shaft (44). As a result, the second connecting rod (22) and the expansion shaft cam (21) slide to the right, and the convex portion (20) faces the concave portion (18) of the roughing grindstone holder (14). It faces the peak (19) of the grindstone holder (16).

  As a result, the roughing grindstone holder (14) is urged by the tension spring (17) and retracts inward, and the finishing grindstone holder (16) protrudes in the radial direction. Therefore, it is possible to shift from roughing to finishing without re-clamping the workpiece.

Regarding the two-stage operation of the roughing grindstone (13), which is a rough grindstone, and the finishing grindstone (15), which is a finishing grindstone, through the second connecting rod (22), Japanese Patent No. 1376703 is a conventional technique. This is the same as the technique described in the publication.
The present invention further incorporates the connecting rod (52), connecting rod (64), connecting cylinder shaft (55), connecting rod (51), and connecting rod (62) inside the second connecting rod (22). Thus, two different operations are possible.

Next, in FIG. 2, the configuration and operation of the first piston (41), the second piston rod (42), and the third piston (50) will be described. The hydraulic cylinder case (3), which is integrally formed with the shaft (2) of the honing shaft (1) and is rotatably supported inside the rotary valve (4), has a shielding wall ( 39) is arranged.
A first piston (41) is slidably arranged on the honing head (11) side and a second piston (43) is arranged on the shank (2) side across the shielding wall (39). Yes.

  The first piston (41) and the second piston (43) enable the expansion shaft cam (21) to slide in the honing head (11). A third piston (50) for sliding the expansion plate cam (63) in the honing head (11) is fitted on the further piston (2) side of the second piston rod (42).

  In the honing head (11), since the two cam bodies of the expansion shaft cam (21) and the expansion plate cam (63) are slidably arranged in the axial direction, the expansion shaft cam (21) When the extension plate cam (63) is moved to a position other than the intermediate position at the same time, two types of grindstone holders are projected from the honing head (11). For this, the expansion shaft cam (21) needs to be securely fixed at an intermediate position. For this purpose, an intermediate positioning cylinder piston (53) is provided inside the shielding wall (39) to constitute an intermediate positioning mechanism for the expansion shaft cam (21).

  That is, the intermediate positioning cylinder piston (53) is slidably fitted to the cylinder portion formed inside the shielding wall (39) so that the intermediate positioning cylinder piston (53) can slide to the left and right. ), The first piston (41) is moved to a position where the right intermediate positioning cylinder piston (53) protrudes. Next, the second piston (43) is moved to the left to contact the shielding wall (39). In this state, an intermediate positioning state is achieved.

  If the intermediate positioning state is achieved, then the third piston (50) is selectively slid to selectively expand the third and fourth grinding wheels. First, by applying pressure oil to move the third piston (50) to the left side, the superfinishing grindstone holder (94) of the superfinishing grindstone (90) that is the third grindstone can be expanded. . Further, by adding pressure oil so as to move the third piston (50) to the right side, the deburring finishing grindstone holder (93) of the fourth deburring finishing grindstone (91) can be expanded. .

  The hydraulic cylinder case (3) is provided with oil passages for the first piston (41), the second piston rod (42), the third piston (50), and the intermediate positioning cylinder piston (53). The oil passage (33) is an oil passage for supplying pressure oil between the joint portion (6) and the first piston (41). The oil passage (34) is an oil passage for supplying pressure oil in a direction in which the intermediate positioning cylinder piston (53) is housed in the shielding wall (39). The oil passage (54) is an oil passage for supplying pressure oil between the inside of the shielding wall (39) and the intermediate positioning cylinder piston (53) through the oil passage of the shielding wall (39). An oil passage for projecting the intermediate positioning cylinder piston (53) toward the first piston (41).

  The oil passage (36) supplies pressure oil between the shielding wall (39) and the second piston rod (42), and slides the second piston rod (42) toward the third piston (50). This is the oil passage. The oil passage (37) is an oil passage for supplying pressure oil that slides the third piston (50) to the side of the crank (2), and the oil passage (70) connects the third piston (50) to the second piston rod. (42) An oil passage for supplying pressure oil for sliding to the side. In addition, a small-diameter piston (89) is interposed inside the third piston (50), and when an impact is applied to the expansion plate cam (63), the third piston (50) is inside the third piston (50). It is configured to absorb shocks. Pressure oil switched by a solenoid valve is supplied from the rotary valve (4) to the above oil passages, so that the roughing grindstone (13) and the finishing grindstone (15) are provided in one multistage expansion honing device. In addition, four types of grindstones, that is, a superfinishing grindstone (90) and a deburring finish grindstone (91), can selectively protrude from the honing head (11).

  In the third piston (50), a small-diameter piston (89) disposed inside is connected to a connecting rod (52). The connecting rod (52) is connected to the connecting rod (64) by a screw shaft (86) at both ends. The connecting rod (64) is connected to the connecting cylinder shaft (55) by a ball joint (85). The connecting cylinder shaft (55) is connected to the connecting rod (51) at the ball joint (85). The connecting rod (51) is connected to the connecting rod (62) at the screw shaft (80) at both ends. The connecting rod (62) is screwed to the expansion plate cam (63).

  With this configuration, the third piston (50) and the small-diameter piston (89) are slid in the axial direction by hydraulic pressure, so that the expansion plate cam (63) also slides in the axial direction, and the cam surface of the plate is The superfinishing grindstone holder (94) and the deburring finishing grindstone holder (93) are protruded and stored. Further, as described above, the second piston (43) is connected to the head (45) in the direction of pushing the head (45) via the second piston rod (42). Moreover, the 1st piston (41) is connected in the direction which pulls a head (45) via the 1st piston rod (40).

  The head (45) is configured at one end of the joint cylinder shaft (44). The joint cylinder shaft (44) is connected to the second connecting rod (22) and the ball joint (85). The other end of the second connecting rod (22) is connected to the joint shaft (60) via a joint body (23) and a ball joint (58/59). The joint shaft (60) is connected to the connecting cylinder shaft (66) by a screw portion, and finally the connecting cylinder shaft (66) is connected to the expansion shaft cam (21).

  With this configuration, the first piston (41) and the second piston (43) slide inside the hydraulic cylinder case (3), so that the expansion shaft cam (21) is centered inside the honing head (11). It is slid in the direction.

  By configuring as described above, the roughing grindstone (13) and the finishing grindstone (15) can be obtained by sliding either the expansion shaft cam (21) or the expansion plate cam (63) in the axial direction. ), A superfinishing grindstone (90), and a grindstone finishing grindstone (91) can be appropriately selected and projected.

  That is, without re-clamping the workpiece, the roughing grindstone holder (14), the finishing grindstone holder (16), the superfinishing grindstone (90), the superfinishing grindstone holder (94), and the deburring The finishing grindstone (91) and the deburring finishing grindstone holder (93) are extended and protruded, and it is now possible to combine roughing, finishing, super-finishing, and deburring finishing. .

  Furthermore, by arranging various cylinders on the same axis, many combination expansion operations can be realized in a compact manner.

DESCRIPTION OF SYMBOLS 1 Honing shaft 2 Shank 3 Hydraulic cylinder case 4 Rotary valve 5 Thrust bearing 6 Joint part 7 Universal joint 8 Intermediate shaft 9 Universal joint 10 Joint part 11 Honing head 12 Slit-like operation hole 13 Roughing grindstone 14 Roughing grindstone holder 15 Finishing grindstone 16 Finishing grindstone holder 17 Tension spring 18 Recessed portion 19 Mountain portion 20 Convex portion 21 Expansion shaft cam 22 Second connecting rod 23 Joint body 33, 34, 35, 36, 37, 54 Oil passage 35 First hydraulic cylinder 38 Second hydraulic cylinder 39 Shielding wall 40 First piston rod 41 First piston 42 Second piston rod 43 Second piston 44 Joint member 45 Head 50 Third piston 51 Connecting rod 52 Connecting rod 53 Intermediate positioning cylinder piston 54 Oil 55 Connection cylinder shaft 58 Ball joint 59 Ball joint 60 Joint shaft 62 Connection rod 63 Expansion plate cam 64 Connection rod 66 Connection cylinder shaft 70 Oil passage 80 Both ends screw shaft 82 Desorption lever 83 Desorption lever cylinder shaft 84 Lock cam shaft 85 Ball joint 86 Both ends Screw shaft 89 Small-diameter piston 90 Super finishing grindstone 91 Deburring finishing grindstone 93 Deburring finishing grindstone holder 94 Superfinishing grindstone holder

Claims (8)

In the honing process of the cylinder block of the engine, in order to reduce the oil consumption during the sliding of the piston with respect to the engine cylinder, the roughing of the surface is maintained from one honing head (11) in order to maintain an appropriate state. In addition to the processing grindstone (13) and the finishing grindstone (15), three or more kinds of grindstones, to which a superfinishing grindstone (90) or a deburring finishing grindstone (91) is added, are appropriately selected and projected. In the configuration that can be expanded in multiple stages, the expanded shaft cam is used as a cam mechanism for projecting the grindstone holder in the slit-like operation hole (12) of the honing head (11). (21) and an expansion plate cam (63) are arranged, and the honing head (11) has the slit-like operating hole (12) as follows: Both slit-shaped operating holes (12) are engraved in the radial direction of the grindstone holder that is protruded and stored by the movement of the tension shaft cam (21) and the grindstone holder that is protruded and stored by the movement of the expansion plate cam (63). multistage expansion honing apparatus characterized by the. The multi-stage expansion honing device according to claim 1, wherein an expansion shaft cam (21) is fitted inside the honing head (11), and a plurality of grooves provided in the expansion shaft cam (21) are provided by a plate. A multi-stage expansion honing device characterized in that the expansion plate cam (63) thus configured is fitted so as to be freely protruded and accommodated to form a double structure . The multistage expansion honing device according to claim 1, wherein a piston for operating the expansion shaft cam (21) and a piston for operating the expansion plate cam (63) are juxtaposed in the hydraulic cylinder case (3). A featured multi-stage expansion honing device. The multi-stage expansion honing apparatus according to claim 3, wherein a multi-stage expansion honing apparatus from the hydraulic cylinder case (3) to the honing head (11) has a connecting portion for operating the expansion shaft cam (21) and an expansion plate. A multi-stage expansion honing device characterized in that the connecting portion for operating the cam (63) is arranged in a double shaft structure . 5. The multistage expansion honing device according to claim 4, wherein an intermediate positioning mechanism for avoiding interference between the expansion shaft cam (21) and the expansion plate cam (63) is provided inside the hydraulic cylinder case (3). Multistage expansion honing device characterized by The multi-stage expansion honing apparatus according to claim 1, wherein two universal joint portions that allow bending of the multi-stage expansion honing apparatus are configured between the hydraulic cylinder case (3) and the honing head (11). A multi-stage expansion honing device characterized by that. The multi-stage expansion honing apparatus according to claim 1, wherein a ball joint portion for attaching / detaching the portion of the extension plate cam (63) and a portion of the extension shaft cam (21) are provided so that the honing head (11) can be attached / detached. A multi-stage expansion honing device characterized in that a detachable ball joint portion is provided . The multistage expansion honing apparatus according to claim 7, wherein a demounting lever for detaching the honing head (11) is disposed so as to protrude from the outside of the multistage expansion honing apparatus. Honing device.

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