JPH0335955A - Grinding head revolving driving device for multihead grinding machine - Google Patents

Abstract

PURPOSE:To reduce the cost of a grinding machine, to simplify the constitution, to reduce a space for a revolving dividing table, and to increase a work space by a method wherein a rotation force transmission part is brought into contact with and separated away from a grinding stone shaft in linkage with selection dividing of a cutting head. CONSTITUTION:A revolving head drive part 20 formed with three sets of grinding heads H1, H2, and H3, a rotating driving part for a motor M, and a transmission part for transmitting a rotation force to the grinding head H1 located in a grinding work position A is mounted on a revolving dividing table 6 of a multihead grinding machine 10. A clutch mechanism of a kind is formed such that a transmission belt run around a pulley 11 of the motor M is engaged in a bent state with or linearly separated from an internal grinding main spindle pulley 14, mounted to the rear end of the grinding head H1, by means of a running stretching member. This constitution divides grinding stones T1, T2, and T3 of the arbitrary grinding head of tress sets of the grinding heads H1, H2, and H3 to the grinding work position A, and executes a grinding work, e.g., given internal grinding.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention provides a grinding machine that uses a small-diameter grindstone, such as an internal grinder, in which a plurality of grinding heads are provided on a rotating index stand, and an iJ
! The present invention relates to a grinding head rotation drive device for a multi-head grinder that selectively indexes and uses grinding heads.

"Prior art and its problems" In grinding machines that use small-diameter grinding wheels such as internal grinders, several types of grinding heads with the same diameter or different grinding wheel diameters are arranged on a rotating indexing table due to reasons such as the short life of the grinding wheels. established,
A method has been proposed in which a predetermined selected grinding head is used to grind a workpiece. Also, Jikai Showa 6
2-100847, it has been proposed that one grindstone spindle is equipped with two grindstone shaft units, and a workpiece is ground by a predetermined grindstone spindle unit by moving the headstock or the lower grindstone spindle stand. Each of the grinding heads described above is independently equipped with a motor and a power transmission member. For this reason, the number of motors and power transmission members required for each grinding head increases the coast of the grinding machine, complicates the configuration, and increases the space for the rotating indexing table, while sacrificing work space. There are many problems with rF.

"Problems and Means to be Solved by the Present Invention" The present invention provides a grinding machine that uses a small-diameter grindstone, such as the above-mentioned internal grinder, by equipping a rotating indexing table with a plurality of grinding heads, and using only one grinding head for grinding as appropriate. In view of this, it is desirable to provide a multi-head grinder that is equipped with a set of rotational force transmission parts for one grinding head selected at the grinding position and a rotational drive part that transmits power to the rotational force transmission part. Take it as a challenge.

That is, in a multi-head grinding machine in which a plurality of grinding heads are provided on a rotating indexing table and the grinding heads are selectively indexed and used, a rotational force transmission section of a grindstone shaft to one grinding head selected for grinding, The grinding head rotation drive device includes a rotational drive unit that transmits power to the rotational force transmission unit, and separates the rotational force transmission unit from the grindstone shaft in conjunction with selection indexing of the grinding head. .

The specific means is (1) to make a multi-head grinder equipped with a plurality of grinding heads on a rotating indexing table and selectively index any grinding head to the grinding position, and rotate the grinding head that has been selectively indexed. The transmission belt of the winding tension member, which serves as a force transmission member, is wound around the motor pulley of the rotation drive unit and a pair of tension pulleys.

When the tension pulley is extended horizontally to the left and right by the swinging rod connected to the pair of actuators, taking on a triangular shape and moving away from the pulley provided in the grinding head, and when the swinging rod is rotated downward, the tension pulley A grinding head rotation drive device in which a transmission belt is wound around and engaged with the pulley in a W-shape.

(2) A multi-head grinding machine is equipped with a plurality of grinding heads on a rotating indexing table, and any grinding head is used by selectively indexing it to the grinding position, and serves as a rotational force transmitting member for the selectively indexed ω1 grinding head. The transmission belt of the winding V4 tension member is wound in a triangular shape around the motor pulley of the rotation drive unit and a pair of tension pulleys, and when the tension pulley is contracted by the telescoping rod connected to the pair of actuators, the transmission belt moves from the pulley provided on the grinding head. A grinding head rotating/opening device configured such that the tension pulley wraps and engages a transmission belt around a pulley provided in the grinding head in a W-shape when the telescopic rod is separated and the telescopic rod is extended.

(3) A multi-head grinder is provided with a plurality of grinding heads on a rotating indexing table, and one grinding head is selectively indexed to the grinding position and used, and serves as a rotational force transmitting member for the selectively indexed grinding head. The transmission belt of the winding tension member is wound between the pulley of the motor mounted on the motor bracket and the pulley at the lower end of the hanging rod, and is an elevating actuator that raises and lowers the motor bracket.

Grinding comprising a motor advancing and retreating member that moves forward and backward in the direction of the pulley of the grinding head, and a lower end pulley portion of a transmission belt wound between the motor pulley and the pulley at the lower end of the hanging rod is engaged with and disengaged from the pulley of the grinding head. Head rotation drive device.

"Operation" In the multi-head grinding machine of the present invention, when selecting and indexing a predetermined grinding wheel for a workpiece, the power transmission part wound around the grinding wheel shaft separates, and after this, the rotation tracking part of the indexing table is activated. A predetermined grinding head is determined.

Following the completion of indexing, the power transmission unit is wound around the grindstone shaft again, and the selected grindstone shaft rotates at a predetermined rotational speed at high speed due to the rotational torque from the dynamic motor, grinding the inner circumference of the workpiece, etc. Let's do it.

"Example" FIG. 1 shows a side view of a multi-head grinder equipped with a grinding head rotation drive device of the present invention, and FIG. 2 is a plan view of the multi-head grinder,
FIG. 3 is a partial side sectional view of the grinding head rotation drive device according to the first embodiment of the present invention, FIG. 4 is a partial front sectional view of the grinding head rotation interlocking device, and FIG. 5 is a rotational force transmission section and the grinding head. FIG. 6 is a front view of a state in which the rotational force transmitting portion and the grinding head are engaged with each other.

In FIG. 1, a multi-head grinding machine 10 has a bed l serving as a base.
And, at one end of the bed, there is a chuck 2 that grips the workpiece.
A sliding box 4 is provided with a drive motor 3 and an auxiliary motor 3, and the chuck is rotated by a belt 5. on the other hand.

At the other end of the bed, three sets of grinding beds l1. The rotary grindstone head drive section 20 is equipped with a rotary drive section for H2, H3 and a motor M, a rotational force transmission section for transmitting rotational force toward and away from the grinding bed 11 at the grinding position A. The rotating and indexing table 6 is mounted on a movable base 7 that is moved in the X-axis direction by a feed motor 8 and a movable base 9 that is moved in the Y-axis direction by a feed motor 10. Thus, the rotary indexing table 6 indexes an arbitrary grinding bed 11 to the grinding apparatus A for the work gripped by the chuck 2 by means of a known rotary means about the rotary axis 0.

Movement is controlled in the X and Y axis directions. The motor M is mounted on the movable table 9, and is arranged above the grinding position A and parallel to the shaft ring, regardless of the rotation of the rotating index table 6. The transmission belt 12 wound around the pulley Jl of this motor M is then bent and engaged or linearly separated from the inner grinding main shaft pulley 14 provided at the rear end of the grinding bed l1 by the tension member 13. constitutes a clutch mechanism.

Next, the details of the grinding head rotation assist device 20 of the present invention will be explained in detail with reference to FIGS. 3 to 6. The transmission belt 12 of the zero-wrap tension member 13 is connected to the pulley 11 of the motor M and the pair of tension pulleys 15 and 16. wrapped around.

As shown in FIG. 5, the pulleys 15 and 16 are in a horizontal position extending left and right, exhibiting a triangular shape, and separated from the inner grinding main shaft pulley 14 provided at the rear end of the grinding bed l1.

Also, the rack rods 19.20 connected to the pair of left and right cylinder actuators 17.20 are tension boots 15.20.
Since the pinions 23 and 24 of the swing rods 21 and 22 of No. 16 are engaged with each other, by operating the cylinder actuator 17 and 18, the swing rods 21 and 22 are rotated downward as shown in FIGS. The zero winding tension at which the tension pulleys 15 and 16 wind the transmission belt 12 around the inner grinding spindle pulley 14 in a W-shape is determined by the spring 25.
26 to a predetermined value, and transmits the motor torque to the pulley 14 without slipping.

Next, the internal structure of the cylinder actuator 17, 18 and the swinging rods 21, 22 will be explained only on one side with reference to FIG. 3.4. The cylinder actuator 17 includes a piston rod 27 and a spring 28 that pushes the piston rod outward.

With this spring force, the rack rods 19, 20 rotate the binions 23 counterclockwise, and the tension pulleys 15, 16 are placed on standby as shown in FIG. The above binion 23 is.

A base shaft 30 is supported by a bearing 29, and a support rod 31 extends downward. The swinging rod 21 is telescopically fitted into the support rod 31, and its stroke is limited by a pin 32 and a long hole 33, and is extended by a built-in spring 25. Tension pulley 15.

It is supported by a support shaft 34 via a bearing 35 so as to be able to freely rotate once. With this configuration, as described above, the rotational force of the motor M is not transmitted away from the inner grinding main shaft pulley 14 provided at the rear end of the grinding bed l1 in FIG. 4.6
When the swinging rods 21 and 22 are rotated downward as shown in the figure, the tension pulleys 15 and 16 wind the transmission belt 12 around the inner grinding main shaft pulley 14 in a W-shape. This winding tension is adjusted to a predetermined value by springs 25 and 26 built into the two swinging rods 21 and 22, and the motor torque is transmitted to the pulley 14 without slipping.

Next, a second embodiment of the invention will be described with reference to FIGS. 7 to 9. In this embodiment, instead of the pivoting rods 21 and 22 of the tension pulley 15.16, an extendable support rod 210,
220. Therefore, the cylinder actuators 17 and 18 are attached to the mounting plate 30 of the motor bracket MB.
They are each installed at an angle #r4 of about 45 degrees. The support rods 210 and 220 are now inclined downwardly at about 45 degrees and face each other.

Of course, since the same springs 25 and 26 as in the first embodiment are built in, when the cylinder actuators 17 and 18 extend the support rods 210 and 220 as shown in FIG. 9, the tension pulleys 15 and 16 are transmitted. The zero winding tension for winding the belt 12 around the inner main shaft pulley 14 in a W-shape is adjusted to a predetermined value by the spring 2526 built into the swinging rod 21, 22, and the motor torque is transferred to the pulley river 4 without slipping. It is configured to communicate. On the other hand, as shown in FIG.
When 10 and 220 are contracted, tension pulley 15,
16 separates the transmission bell 2 from the inner grinding main shaft pulley 14 and tensions it in a triangular shape to enable rotational indexing operation of the grinding head Hl.

Finally, a thirteenth embodiment of the present invention shown in FIGS. 10 to 12 will be described. In this embodiment, a motor M is used to move the lower end pulley 132 of the transmission belt 12, which is wound between the pulley 11 and the pulley 32 at the lower end of the hanging rod 31, to the grinding head by moving the motor M forward and backward in the direction of the pulley of the grinding head H1. )-(1) has a relational configuration in which it engages and disengages from the pulley 14.Motor M
The elevating member S1 includes an elevating actuator 34 on a column 33 of a movable table 9F, and a motor bracket M at the upper end of the elevating actuator 7.
It is equipped with B. Then, the motor bracket (MB) is moved up and down by the operation of the lifting actuator 34. One motor advancing/retracting member S2 has the upper end of an operating rod 36 provided at the tip of the advancing/retracting actuator 35 mounted on a support base 37 attached to the upper end of the support column 33 engaged with the motor bracket MB;
The engagement is configured such that the engagement does not come off due to the lifting and lowering movement of the lifting member 81 of the motor M. The details are the same as those of the known means, so the explanation will be omitted.

According to this embodiment, as shown in FIG. 10, the lower end pulley 32 portion of the wide transmission belt 12 is engaged with the pulley 14 of the grinding head H1. Then, as shown in FIG. The lower end pulley 32 portion of the transmission belt 12 is separated from the pulley 14 of the grinding head H1.

After this, the motor is raised by the upward motion by the lifting part aSl, and the lower end pulley 32 portion of the transmission bell) 12 is sufficiently moved upward from the pulley 114 of the grinding head I41, thereby adjusting the turning index of the grinding head I-(1). After selecting the fl'I grinding head, the pulley of the flange grinding head and the motor pulley 11 engage again in the reverse order of the above operation.

As mentioned above, 3 sets of grinding heads! (1,112,Ii
3-A [Whetstone T1 of the grinding head] , T2. T3 is indexed to the grinding position f, and a predetermined internal grinding process is performed.
will be implemented. Furthermore, whetstone TI, T2. Of course, T3 may be equipped with grindstones with different outer diameters, grindstones with the same diameter, or two with different abrasive grain counts.

The present invention is not limited to the above embodiments; it goes without saying that the design can be changed within the scope of the invention.

For example, the number of equipped grinding heads is limited to three sets, and the present invention is not limited to internal grinding machines, but can of course be applied to other types of grinding machines. Further, the rotating indexing table and the transmission belt 12 of the winding tension member 13 are controlled by a control device so as to operate in conjunction with each other, and if necessary, they may be operated manually.

"Effects of the Invention" According to the present invention, one ω) rotational force transmitting part for the grinding wheel shaft of the grinding head selected at the grinding position and 11
．． 7. Part 1! ! 1 rotational force transmission A rotational drive unit that transmits a force transmission force is provided, and the rotational force transmission unit is moved into contact with and away from the grindstone shaft in conjunction with the selection index of the 1L11 cutting head, so that one drive In addition to the feature that this drive source can be easily connected to and separated from the grinding wheel shaft of each grinding head, it is only necessary to have one drive unit, which reduces the cost of the grinder and simplifies the configuration. While the space of the rotating index table can be reduced, the work space can be expanded.

Historically, with the configuration of each specific embodiment, it is possible to transmit the rotational force to the grinding head υ) by simply using the -F stage of the transmission belt, and also to maintain the winding tension of the transmission belt at a predetermined ha. 7. ? There is an effect that can be done.

Furthermore, the present invention is not limited to internal grinding machines, and can of course be applied to other types of grinding machines.

[Brief explanation of drawings]

FIG. 1 is a side view of a multi-head grinding machine equipped with a grinding head rotation drive device of the present invention, FIG. 2 is a plan view of the multi-head grinder, and FIG. 4 is a partial front sectional view of the grinding head rotation drive device, FIG. 5 is a front view of the rotational force transmission section and the grinding head separated, and FIG. 6 is the rotational force transmission section. FIG. 3 is a front view of the state in which the and the grinding head are engaged. Fig. 7 is a partial side view of the grinding head rotation drive device according to the second embodiment of the present invention, Fig. 8 is a front view of the weir in which the rotational force transmission section and the grinding head are separated, and Fig. 9 is the same rotational force. FIG. 1O is a partial side view and front view of a grinding head rotation drive device according to a third embodiment of the present invention;
FIG. 11 is a side view and front view of the rotational force transmitting part and the 01 grinding head separated. FIG. 12 is a side view and front view of the rotating force transmitting part and the grinding head separated.

Claims (4)

[Claims] (1) In a multi-head grinding machine that is equipped with a plurality of grinding heads on a rotating indexing table and selectively indexes and uses an arbitrary grinding head,
A rotational force transmitting part for the grinding wheel shaft of one grinding head selected at the grinding position, and a rotational drive part transmitting power to the rotational force transmitting part, A grinding head rotation drive device for a multi-head grinding machine, characterized in that a force transmitting part is brought into contact with and separated from the grindstone shaft. (2) A multi-head grinder is equipped with a plurality of grinding heads on a rotating indexing table, and a grinding head is selectively indexed to a grinding position. The transmission belt of the hanging tension member is wound around the motor pulley of the rotary drive unit and a pair of tension pulleys, and the tension pulley is connected to a pair of actuators by a swinging rod, which assumes a horizontal triangular position extending left and right, and drives the grinding head. The multi-head grinding machine is characterized in that when the tension pulley separates from the pulley provided for and rotates the swinging rod downward, the tension pulley wraps and engages the transmission belt around the pulley in a W-shape. Grinding head rotation drive device. (3) A multi-head grinding machine is equipped with a plurality of grinding heads on a rotating indexing table, and any grinding head is selectively indexed to a grinding position. The transmission belt of the hanging tension member is wound around the motor pulley of the rotation drive unit and a pair of tension pulleys in a triangular shape, and the tension pulley separates from the pulley provided in the grinding head when the telescopic rod connected to the pair of actuators contracts. A grinding head rotation drive device for a multi-head grinding machine, characterized in that, when the telescopic rod is extended, the tension pulley wraps and engages the transmission belt around the pulley provided in the grinding head in a W-shape. (4) A multi-head grinder is equipped with a plurality of grinding heads on a rotating indexing table, and a grinding head is selectively indexed to a grinding position. The transmission belt of the hanging tension member is wound between the pulley of the motor mounted on the motor bracket and the pulley at the lower end of the hanging rod, and includes an elevating actuator that moves up and down the motor bracket, and a motor moving member that moves back and forth in the direction of the pulley of the grinding head. A grinding head rotation drive device for a multi-head grinding machine, characterized in that the lower end pulley portion of the transmission belt wound between the motor pulley and the pulley at the lower end of the hanging rod is connected to and disengaged from the pulley of the grinding head. .