JP2597376B2 - Spindle exchangeable processing equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle-exchangeable processing apparatus for processing a plurality of types of workpieces conveyed on the same line by a single processing machine.

<Prior Art> When processing a plurality of types of workpieces conveyed on the same line by a transfer device, conventionally, a plurality of processing machines for processing each workpiece along the transport line are installed, and each processing is performed. And a plurality of processing heads are installed at a predetermined interval on one slide table, and the slide table is moved to a work conveyed to one processing station to move a predetermined processing head to the work. Some processes are performed in correspondence with them.

<Problem to be Solved by the Invention> In the former case of the above-mentioned conventional technology, a plurality of processing machines are required, the equipment cost is expensive, and the installation space is large. In the latter case, the entire machine becomes long and requires a large installation space, and in addition, an idler station is required for the length of the whole machine.

<Means for Solving the Problems> The present invention provides a processing apparatus that solves the above-mentioned conventional problems, and the configuration of the processing apparatus according to claim 1 is a direction in which a bed approaches or separates from a workpiece. And a processing head mounted on the table, the processing head being provided with a plurality of spindles, for selectively indexing the plurality of spindles to a processing position. A ram formed rotatably, in which the plurality of spindles have different distances about an axis parallel to the axis of rotation of the ram and between the axis of rotation of the ram and the axis of the spindle; A ram rotation indexing mechanism that includes a bearing and a drive source to selectively index and position the plurality of spindles at a machining position, and machining in a pulley provided on each of the spindles A belt spanned between a spindle pulley indexed to a position and a spindle rotation motor installed on the table, and a spindle indexed to a processing position by a rotation indexing operation of the ram by the drive source. An automatic belt tension adjusting device that adjusts the tension of the belt according to the pulley.

According to a second aspect of the present invention, in the processing apparatus according to the first aspect, the auto-belt tension adjusting device includes a tension pulley, a support arm swingable with respect to the table, and one end. A link that is pivotally supported by the support arm and that has the other end pivotally supported at a position offset from the rotation axis of the ram by a predetermined amount on the ram.

<Operation> With the above-described configuration, when a plurality of spindles having different distances between the rotation axis of the ram and the spindle axis are indexed to the machining position and machining is performed, the spindles assigned to the machining position are used. The belt tension is automatically adjusted by the indexing operation of the ram indexing mechanism according to the pulley.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings. First
In the figure, W indicates a work, WL indicates a work transfer line by a transfer device or the like, and ST indicates a processing station of the work W. 1 is a bed of the processing apparatus according to the present invention,
It is installed along the work transfer line WL. The bed 1 has a guide surface 2 in a direction parallel to the work transfer line WL, and a first table 3 which is fed and moved along the guide surface 2 is guided. 4 is a feed screw, and 5 is a servomotor for rotating the feed screw 4 forward and backward.

The first table 3 has a guide surface 6 in a direction orthogonal to the work transfer line WL, and a second table 7 that is moved forward and backward along the guide surface 6 is guided. 36
Is a hydraulic cylinder, and 37 is an operating rod connecting the hydraulic cylinder 36 and the second table 7.

Reference numeral 8 denotes a processing head, which is installed on the second table 7. Reference numeral 9 denotes a spindle rotation motor, which is also installed on the second table. A belt 10 is stretched between the spindle rotation motor 9 and pulleys of an even number of spindles provided on the processing head 8 described later.

The specific configuration of the processing head 8 will be described with reference to FIGS. 8a is a processing head body. In the processing head body 8a, a cylindrical ram 11 is rotatably provided around a rotation center 0 line at a required inclination angle θ with respect to the work transfer line WL.

In the ram 11, four spindles 12a, 12b, 13
a, 13b are rotatable about an axis parallel to the rotation center 0 line of the ram 11, and the rotation axis 0 of the ram 11 and the spindles 12a, 1
The bearings are mounted so that the distances between the axes of 2b, 13a and 13b are different.

That is, the distance between the spindles 13a and 13b and the distance from the rotation center 0 are all longer than those of the spindles 12a and 12b. The number of spindles may be five or more. For example, when the number of spindles is six, it may be indexed to the descending position A two by two, or may be indexed to the descending position A three by three. At the tip of the spindles 12a, 12b, 13a, and 13b, that is, at the workpiece transfer line WL side, tools 14 and 15 for processing two types of workpieces into hemispherical shapes are mounted, and at the rear end, Pulleys 23a, 23b, 24a, 24b are attached.

In FIG. 1, A is a spindle 12a, 12b or a spindle 12a, 12b corresponding to two types of workpieces W transported to the processing station ST.
This is a processing position at which 13a and 13b are exchanged and positioned. The replacement positioning of the spindles 12a, 12b or 13a, 13b to the processing position A is performed by 180-degree rotation indexing of the ram 11. The 180-degree index rotation positioning mechanism of the ram 11 is as follows.

A concentric ring gear 16 is fixedly mounted on the rear end surface of the ram 11, and a ram rotation hydraulic motor 17 having a gear 17a meshing with the ring gear 16 is installed on the processing head body 8a.

On the other hand, a contact member 19 is provided at the rear end of the ram 11, and stoppers 20a and 20b are provided on the processing head main body 8a to contact the contact member 19 when the ram 11 rotates 180 degrees.

Further, engaging grooves 18a and 18b are provided at two positions at 180 degrees on the outer peripheral surface of the ram 11, and a positioning cylinder 21 having a knock pin 22 engaged and disengaged with the engaging grooves 18a or 18b is attached to the machining head body 8a. The configuration is fixed.

Pulleys 23a, 23 of the spindles 12a, 12b, 13a, 13b
The belt 10 stretched over the b, 24a, 24b includes pulleys 23a, 23
Since the distances between the shafts b, 24a and 24b are different, it is necessary to adjust the tension of the belt 10 when the ram 11 is rotated to index and position the spindles 12a, 12b, 13a and 13b at the processing position A.

Therefore, in the present invention, the automatic belt tension adjusting device
25 are provided. The configuration of the automatic belt tension adjusting device 25 will be described. A bracket 26 is fixedly mounted on the second table 7 at a substantially intermediate point between the processing head 8 and the spindle rotation motor 9, and a support arm is attached to the bracket 26.
27 is pivotally supported 28 so as to be swingable in the running direction of the belt 10. A support shaft 29 that supports the tension pulley 31 by a shaft 32 is fitted to the support arm 27 so as to be vertically movable, and is constantly urged by a spring 30 in the upward direction.

Further, one end of a link 33 is pivotally connected to a shaft 32 coaxially with a shaft fulcrum of the tension pulley 31. The other end of the link 33 has a support shaft 35 having an axis parallel to the axis of the ram 11 fixed to a plate 34 fixed in a diametrical manner passing through the center point of the link gear 16 and pivotally connected to the support shaft 35. Is being worn.
The fixing point of the support shaft 35 is a position 01 eccentric from the rotation center 0 of the ram 11. That is, the link 33 is a ram
11 is supported at a position offset by a predetermined amount from the rotation axis 0.

 Next, the operation of the above configuration will be described.

In the figure, the spindles 12a and 12b are positioned at the processing position A with respect to the work W at the processing station ST. In this case, the knock pin 22 engages with the engagement groove 18a, and the contact member 1
9 is in contact with the stopper 20a. The other end of the link 33 is located at an eccentric position 01 of the support shaft 35 above the rotation center 0 of the ram 11, and the tension pulley 31 is
The belt 10 stretched over the pulleys 23a, 23b and 24a of a, 12b and 13a is properly adjusted.

Therefore, the machining position A is controlled by the spindle rotation motor 9.
The two spindles 12a and 12b are rotated, and the two positions of the work W are simultaneously processed into a semi-spherical shape by the forward feed movement of the second table 7. At this time, the spindle 13a rotates and the spindle 13b does not rotate, but in any case, the spindles 13a and 13b are located outside the processing position A, and the axis thereof is such that the rotation center 0 line of the ram 11 is aligned with the work transfer line WL. On the other hand, since it is parallel to the required inclination angle θ, the tool 15 at the tip of the spindles 13a and 13b does not come into contact with the workpiece W even when the machining head 8 is moved forward. Subsequently, when the second table 7 is retracted, the first table 3 is moved in the transfer direction of the work W, and the second table 7 is moved forward, the position shifted from the previous processing position in the transfer direction of the work W is obtained. Processing is performed.

When the workpiece W to be machined by the tool 15 of the spindles 13a, 13b is transferred to the machining station ST, the spindles 13a, 12a, 12b have different distances from the rotation axis of the ram 11 to the spindle axis. 13b needs to be exchanged for machining position A. For this purpose, first, the knock pin 22 is disengaged from the engagement groove 18a by the positioning cylinder 21. Next, the ram rotation hydraulic motor 17 is started,
The ram 11 is rotated clockwise by an arrow B in FIG. 3 by the gear 17a and the link gear 16.

In this way, when the ram 11 rotates 180 degrees, the contact member 19 contacts the stopper 20b and is regulated at the 180-degree rotation position. After that, knock pin 22 by positioning cylinder 21
Is engaged with the engagement groove 18b. Thereby, the spindle 12a,
The tool 12b and the spindles 13a and 13b are exchanged at the machining position A, and the tool 14 corresponding to the spindle 13a is indexed upward and the tool 14 corresponding to the spindle 13b is indexed downward and positioned.

The belt 10 is hung on the pulleys 24a, 24b of the spindles 13a, 13b indexed to the processing position A in conjunction with the rotation of the ram 11, and the belt 10 is automatically adjusted to an appropriate belt tension. The movement of the support shaft 35 with the rotation of the ram 11
Rotates eccentrically about the rotation center 0 of the ram 11, and the eccentric position 01 of the support shaft 35 is located below the rotation center 0 of the ram 11 at a rotation position of 180 degrees. As a result, the other end of the link 33 is pulled up, and as shown by the imaginary line in FIG. 3, the support arm 27 and the support shaft 29 are pulled rightward in FIG. 3 and tilted.

As a result, the tension pulley 31 is displaced downward, and automatically adjusts the tension of the belt 10 appropriately in accordance with the pulleys 24a and 24b. At this time, the distance between the axes of the spindles 13a and 13b replaced at the machining position A is the spindle 12a, 1
Since it is larger than 2b, the belt 10 does not contact any of the pulleys 23a, 23b of the spindles 12a, 12b.

<Effects of the Invention> As described in detail above, according to the present invention, the distance between the rotation axis of the ram and the spindle axis, that is, the spindle rotation motor is separated from the spindle axis when indexed to the machining position. When multiple spindles with different distances are indexed to the machining position and machining is performed, the belt tension is automatically adjusted by the indexing operation of the ram rotation indexing mechanism according to the spindle pulley assigned to the machining position. Since the belt is adjusted, the belt tension is automatically adjusted by the ram rotation index driving source only by performing the ram rotation indexing without providing a belt tension adjusting device having a dedicated drive source. It has the advantages that can be.

[Brief description of the drawings]

1 is an overall plan view of the present invention, FIG. 2 is an enlarged cross-sectional plan view of a processing head, and FIG. 3 is an enlarged view of FIG. 1 Bed, 3 First table, 7 Second table, 8 Processing head, 8a Processing head body, 9
Spindle rotation motor, 10 belt, 11 ram
12a, 12b, 13a, 13b: spindle, 16: ring gear, 17: hydraulic motor for ram rotation, 23a, 23b, 24a, 24b
... pulley, 25 ... automatic belt tension adjustment device.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takanori Ota 1-1-1 Asahi-cho, Kariya-shi, Aichi Prefecture Inside Toyota Koki Co., Ltd. (72) Inventor Shozo Kobayashi 1-Toyota-cho, Toyota-shi, Aichi Prefecture Toyota Motor Vehicle Stock In-company (72) Inventor Satoshi Kameyama 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Co., Ltd. (56) References JP-A-62-148109 (JP, A) JP-A 60-184801 (JP, A)

Claims (2)

(57) [Claims] 1. A table, which is guided so as to be capable of being moved toward and away from a workpiece in a direction toward and away from a bed, and a processing head installed on the table, wherein the processing head includes a plurality of spindles. A ram rotatably formed for selectively indexing the plurality of spindles to a processing position, wherein the plurality of spindles are provided around an axis parallel to a rotation axis of the ram and the ram. A rotation indexing mechanism of a ram, which is provided with a drive source for selectively indexing and positioning the plurality of spindles at a machining position, wherein the distance between the rotation axis of the spindle and the spindle axis is different; and Belt that is stretched between a spindle pulley indexed to a processing position among the pulleys provided on the table and a spindle rotation motor installed on the table Spindle interchangeable machining apparatus provided with an auto belt tension adjusting device for adjusting the tension of the belt in accordance with the pulley spindle indexed to the machining position by the ram of the rotary indexing operation by the driving source. 2. The processing device according to claim 1, wherein said auto belt tension adjusting device has a tension pulley, a support arm swingable with respect to said table, and one end of said support arm. And a link rotatably supported at a position offset from the rotation axis of the ram by a predetermined amount on the ram.