JPS62236668A - Honing machine - Google Patents

Abstract

PURPOSE:To facilitate the setting change of the stroke center position of a honing tool and changing the speed and locus by allowing the first slide bed shift means to be operated even during the shift of the second slide bed supporting the honing tool. CONSTITUTION:The first slide bed 4 is supported by support stanchions 2, 2 on a base bed 1, the second slide bed 6 is supported below it, and a honing tool 3 is fitted. In addition, the second slide bed shift means 7 reciprocating the second slide bed 6 is fitted to the first slide bed 4. A table 9 arranging works 8 annularly is provided below the honing tool 3. An operation panel 10 issues action directions for a hydraulic cylinder 7 and predetermined action directions for a numerically controlled motor 5. According to this constitution, the honing tool 3 can perform various motion modes for the work 8, and even the work with the long process face in the axial direction can be honing- processed efficiently.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the improvement of a honing machine, and more specifically, to changing the setting of the stroke center of a horn equipped with a grindstone, and changing the honing speed, locus, etc. Regarding honing machines that can.

[Prior art]

A honing machine uses a fine-grained grindstone attached to a horn to further smooth processed surfaces such as the inner and outer surfaces of cylinders, inner surfaces of holes, and flat surfaces that have been finished by precision boring and grinding, and at the same time to improve dimensional accuracy. Finishing is performed while applying pressure while rotating and reciprocating the workpiece.

In such a honing machine, the up and down reciprocating movement of the grindstone during processing is driven by a motor that transmits power via a crank mechanism to the honing head, which rotatably supports the main shaft to which the horn is attached. or
This is done by expanding and contracting a cylinder that is directly connected to the honing head.

On the other hand, Japanese Utility Model Application Publication No. 57-68743 discloses a device in which a screw-type stopper is brought into contact with a crank mechanism connected to a honing head. According to this, it is possible to adjust the stroke center setting of the horn to be changed by a small amount in accordance with the shape of the workpiece processing surface. Therefore, it is possible to perform unnecessary (finishing of the machined surface) corresponding to each workpiece.

[Problem that the invention seeks to solve]

In the conventional honing machine as described above, the reciprocating motion of the grindstone during processing is performed solely in response to the reciprocating motion of the crank mechanism or cylinder. Therefore, the horn stroke amount is relatively small and uniquely set, and the horn speed and trajectory are also monotonous.

Incidentally, in recent years, the structures of workpieces have become more complex, and the shapes of the machined surfaces of workpieces that require honing have become increasingly diverse. Therefore, in order to handle changing machining surfaces and improve machining efficiency, a honing machine that can greatly change the stroke of the whetstone or arbitrarily change the motion form of the whetstone is needed. is desired. One way to meet these demands is to improve the operating characteristics of the crank mechanism and cylinder mounted on the honing machine. However, increasing the stroke of a drive source such as a crank mechanism or cylinder increases the size and weight of the device. Therefore, in many cases, it is not possible to sufficiently improve the capacity and scale of the crank mechanism, cylinder, etc. to meet the above requirements due to space constraints and cost considerations. By the way, there are two drive sources for moving the horn, and in addition to reciprocating for machining, there are also models that have thick horns (move and index). However, the drive source for indexing is The horn is inserted into and retracted from the workpiece, and is configured to be stopped during machining.Therefore, it is impossible to vary the stroke speed and trajectory of the grindstone during machining. Therefore, improvement is desired.

The present invention was made in consideration of these circumstances, and it is easy to change the setting of the center position of the stroke of the grindstone, and the stroke speed and trajectory of the grindstone can be varied in various ways. The purpose is to provide a honing machine that can be made larger.

[Means for solving problems]

Means of the present invention for achieving the above object consists of the following configuration. A honing machine that performs machining by rotating and reciprocating a honing tool with respect to a workpiece includes a first slide stand that is supported movably in the reciprocating direction of the honing tool by a support column erected on a base. Yes, the first
A first slide table moving means for moving the slide table is provided. A second slide table is supported movably in the same direction as the first slide table and supports a honing tool, and the second slide table is supported by the first slide table and connected to the second slide table. A second slide table moving means for reciprocating the table is provided. The first slide table moving means can operate while the second slide table is being moved.

[For production]

While the second slide table is being reciprocated by the second slide table moving means, the first slide table is moved relative to the second slide table by the first slide table moving means. In this case, both movements are combined, and the honing tool supported by the second slide table and rotationally driven moves with respect to the workpiece at a desired trajectory and stroke speed. Therefore, by varying the operation of the first slide table moving means or the second slide table moving means, the stroke speed and trajectory of the honing tool can be arbitrarily selected.
Moreover, if both operations are superimposed, it is possible to make a thick stroke.In the case where the first slide table moving means and the second slide table moving means are not operated at the same time, the first slide table moving means moves the first slide table moving means. If the operation of the first slide table moving means is stopped after changing the position of the slide table,
You can also change the setting of the stroke center position.

〔Effect of the invention〕

The honing machine of the present invention includes a first slide table, a first slide table moving means for moving the first slide table, and a second slide table that is movable in the same direction as the first slide table and supports a honing tool. supported by the first slide base, and the second
A second slide table moving means is provided which is connected to the slide table and reciprocates the second slide table, and the first slide table moving means can operate while the second slide table is moving. It is easy to change the setting of the stroke center position of the honing tool, the stroke speed and locus can be varied variously, and the stroke amount can be increased.

〔Example〕

Hereinafter, the present invention will be explained in detail based on examples thereof.

FIG. 1 shows an example of a vertical honing machine, in which two vertical support columns 2.2 are erected on a base 1. A first slide table 4 that is movable in the direction is supported. The first slide table 4 is moved by a first slide table moving means 5 located above the first slide table 4, and the first slide table moving means 5 is installed at the upper end of the support column 2.2.
There is ζ. A second slide stand 6 is supported below the first slide stand 4 so as to be movable in the same direction as the first slide stand 4,
A honing tool 3 is rotatably attached to this second slide base. Then, the second slide table 6 is
It is connected to the slide base 4, and the first slide base 4 has a second
A second slide table moving hand [27 is attached to move the slide table 6° back and forth. This second slide table moving means 7 is always provided in a general honing machine in order to reciprocate the honing tool 3 up and down.

For this purpose, a crank mechanism or a hydraulic cylinder, which will be described later, is used, but generally the stroke amount, stroke speed, and trajectory of the honing tool 3 due to its operation are constant. On the other hand, the first slide table moving means 5 has its second slide table moving means 7.
The second slide table 6 has the function of vertically displacing the
It can operate even when the robot is moving, and its behavior can be determined arbitrarily according to a preset program. Note that the support columns 2, 2 are, for example, cylindrical guide rods, and are erected and fixed on the base l, and support the first slide table 4 and the second slide table 6, which are disposed astride both. It is designed to guide the honing tool 3 up and down, thereby preventing the honing tool 3 from wobbling and restricting its movement to only the up and down directions.

The honing tool 3 is a rotary tool called a horn, and has a plurality of, for example, rectangular grindstones attached to its periphery, and grinds and finishes the workpiece by pressing the grindstones against the inner surface of the hole of the workpiece. The above-mentioned first slide table moving means 5 provided at the upper end of the guide rod 2.2 is a numerically controlled motor with an encoder that is driven via a control means (not shown), and moves the first slide table through a ball screw 5a. 4
move up and down. The second slide table moving means 7 provided on the first slide table 4 is a double-acting hydraulic cylinder to which hydraulic oil is supplied and discharged from a hydraulic source (not shown) via a control valve,
The tip of the piston rod 7a is connected to the second slide stand 6, and the reciprocating movement of the piston 7b moves the second slide stand 6.
moves towards and away from the first slide base 4. The second slide table 6 is generally referred to as a honing head, has a built-in motor (not shown), and has a main shaft 6a that is rotatably driven by the motor, and has a main shaft 6a that is rotatably driven by the motor.
are attached integrally by tapered joints, etc.

At a lower position facing the honing tool 3, there is a table 9 on which a plurality of workpieces 8 can be arranged in an annular shape, and is rotationally driven by a motor (not shown) provided on the base 1, so that the workpieces 8 can be sequentially moved to a processing position. It looks like this. The numerically controlled motor 5 used as a means of moving the first slide table 4 is equipped with an encoder as described above, and has extremely good control characteristics as is well known. It becomes possible to move the stand 4. Therefore, the regular movement of the honing tool 3 in its reciprocating motion is mainly performed by the honing head 6 driven by the cylinder 7, and when supplementing this and providing more complex motion characteristics, the first slide table 4 is It may be controlled and driven by the numerically controlled motor 5.

In addition, the numerically controlled motor 5 is compact and easy to install.
The mounting member 5b can be attached to the upper end portions of the guide rods 2, 2 so that only a small space is required. In addition, 1 in the figure
Reference numeral 0 denotes an operation panel through which operation commands for the hydraulic cylinder 7 and commands and designations for desired operations for the numerically controlled motor 5 can be given.

According to such a honing machine, the honing tool 3 can take various forms of movement with respect to the workpiece 8 by combining the movements of the first slide table 4 and the honing head 6. For example, as shown in FIG.
is actuated by the hydraulic cylinder 7 so as to draw a trajectory as shown by the broken line A, and in contrast, the first slide table 4 is actuated by the numerically controlled motor 5 so as to form a periodic curve shown by the dashed line B. Then, the honing tool 3 moves on the machining surface of the workpiece 8 with a large stroke and a high stroke speed as shown by the solid line C. Therefore, it is possible to efficiently hone a workpiece whose machining surface is long in the axial direction.

FIG. 3 shows a different resultant motion, in which the honing head 6 is operated in a locus that draws a periodic curve as shown by the broken line, and when the honing head 6 is located at the lowest end, the first slide table 4 is moved along the dashed line E. This is an example of intermittent movement to slightly raise and lower as shown in . At this time, the honing tool 3 makes two small reciprocating movements at the lowest position, as shown by the solid line F. Therefore, when processing the inner surface of the workpiece 8 that has a bottom, the inner circumferential surface near the bottom surface, which is difficult to process, can be polished twice, so that a good finish can be achieved. In addition, even if the precision of the pre-processing is not good and the machining allowance differs between the top and bottom of the machined surface, the number of times of polishing can be appropriately set according to the machining allowance, and uniform finishing can be performed. Note that by driving the numerically controlled motor 5 before starting machining to displace the honing head 6 and operating the hydraulic cylinder 7 around that position, the machining location can be moved without changing the stroke amount of the honing tool 3. You can change the settings of the stroke center to shift the stroke.

[Brief explanation of drawings]

FIG. 1 is a front view of a honing machine showing an embodiment of the present invention;
FIGS. 2 and 3 are graphs showing the operation loci of the first slide table and the second slide table and the combined operation locus of the honing tool. ■・-Base, 2-Support column, 3-Honing tool, 4-・
・First slide table, 5--First slide table moving means (numerically controlled motor), 6-Second slide table (honing head), 7--Second slide table moving means (hydraulic cylinder)
, 8- Work. Patent applicant Mazda Co., Ltd. Agent Patent attorney Katsutoshi Yoshiso (and 1 other person) Figure 2

Claims (1)

[Claims] (1) In a honing machine that performs machining by rotating and reciprocating a honing tool on a workpiece, there is a first honing machine that is supported movably in the reciprocating direction of the honing tool on a support column erected on a base. a slide stand; a first slide stand moving means for moving the first slide stand; a second slide stand that is movably supported in the same direction as the first slide stand and supports a honing tool; and a first slide stand. a second slide table moving means supported by the second slide table and connected to the second slide table to reciprocate the second slide table, wherein the first slide table moving means is configured to move the second slide table while the second slide table is being moved. A honing machine characterized by being able to operate.