JPS59175936A - Centering and inserting device - Google Patents

Abstract

PURPOSE:To center and insert a work into a shaft member such as a mandrel or the like automatically by a method wherein a work holding device, a shaft member holding device, a centering device centering the work, and an inserting device, fitting and inserting the work into the shaft member, are provided in the device. CONSTITUTION:A guide surface 11 is formed on a fixed base 10 and a slide base 12 is mounted slidably on the guide surface 11. The base 12 is provided with the work holding device 13 and the mandrel holding device 14. The frame 15 of the base 10 is provided with the centering device 16 and the inserting device 17. The base 12 is shifted along the guide surface 11 by a cylinder 18 for shifting and the work holding device 13 and the mandrel holding device 14 are positioned and held at positions corresponding to the centering device 16 and the inserting device 17 respectively while the holding device 13 is indexed at a position corresponding to the inserting device 17 when the work holding device 13 is shifted by a predetermined amount.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a centering/charging device for centering a workpiece having a center hole and automatically loading the workpiece into a shaft member such as a mandrel.

<Prior art> In a grinding device that grinds the outer periphery of a disk-shaped workpiece having a center hole, the workpiece is mounted on a mandrel in a skewered manner, and this '7' mandrel is centrally supported between a headstock and a psychological table. Grinding of workpieces is often performed.

In such products, the accuracy of the fit between the mandrel shaft and the center hole of the workpiece is generally very strict, and in the past, the workpiece had to be manually mounted and removed from the mandrel. This resulted in poor workability and was also an obstacle to automation.

<Object of the Invention> An object of the present invention is to provide a centering and charging device for automatically centering and charging a work into a shaft member such as a mandrel.

<Structure of the Invention> The present invention includes a work holding device that holds a carried-in work, a shaft member holding device that positions and holds a shaft member into which the work is inserted, and a shaft member that fits into a center hole of the work on the work holding device. The centering device includes a centering device for centering the workpiece, and a charging device for receiving the centered workpiece and inserting it into the shaft member on the shaft member holding device.

<Example> Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a diagram showing the entire device of the present invention, in which a fixed base 1
A guide surface 11 is formed on the guide surface 1, and a slide base 12 is slidably mounted on the guide surface 11. A workpiece holding device 13 and a mandrel holding device 14, which will be described later, are provided on the slide base 12 at a predetermined interval in the sliding direction of the slide base 12. Further, a frame 15 is installed on the heath 10, and this frame 1
5, a centering device 16 and a charging device 17 having a structure to be described later in FIG. 5 are installed at a predetermined interval in the sliding direction of the slide base 12. The slide base 12 is adapted to be shifted by a predetermined amount along the guide surface 11 by a shift cylinder 18, and normally the work holding device 13
The mandrel holding device 14 is positioned and held at positions corresponding to the centering device 16 and the charging device 17, respectively, and when the workpiece holding device 13 is shifted by a predetermined amount, the workpiece holding device 13 corresponds to the charging device 17. It is designed to be indexed to the position to be used. In the figure, reference numeral 19 denotes a mandrel pool in which a plurality of mandrels M are stored removably with their axes vertical.
is the mandrel holding device 14 and the mandrel pool 19
It is designed to be transported between.

As shown in FIG. 9, the mandrel M has a flange MO at one end, and the workpiece W is attached to this flange MO.
A charging shaft portion M1 that fits into the center hole W1 of the workpiece W, and a positioning pin M2 that fits into the positioning hole W2 of the workpiece W are provided protrudingly,
A predetermined number of workpieces W are attached to the tip of the charging shaft M1.
A threaded portion M3 is formed for tightening with a nand, and a center hole is formed at both ends.

Next, the configuration of each part will be explained in order.

FIG. 2 shows the work holding device 13, in which a holding stand 23 is installed on the slide base 12, and this holding stand 23 is installed on the slide base 12.
3, a holding sleeve 24 is rotatably supported around a vertical axis, and a work holding surface 24a is formed on the upper surface of this holding sleeve 24. A holding shaft 25 is fitted into the holding sleeve 24 so as to be vertically slidable.
5 is a spring 2 inserted between the holding sleeve 24;
Due to the repulsive force of
It is held at the rising end position where it protrudes more.

The outer diameter of the tip shaft portion of the holding shaft 25 is set to be somewhat smaller than the inner diameter of the center hole W1 of the workpiece W, and the holding sleeve 2
4, the workpiece W to be carried in is temporarily positioned. Pinion teeth 2 are provided on the outer periphery of the holding sleeve 24.
7 is formed, and a rank shaft 28 that meshes with the pinion teeth 27 is fitted into the holding base 23 so as to be slidable in a direction orthogonal to the holding sleeve 24. The rank shaft 28 is connected to an indexing cylinder 29 (FIG. 1), which allows the retaining sleeve 24 to be rotated through approximately 360 degrees.

A pair of clamp claws 31 for clamping the workpiece W held on the workpiece holding surface 24a are pivotally supported on the holding table 23, and these clamp claws 31 are attached to the holding table 2.
A pin is engaged with the upper end of a connecting shaft 32 that is vertically slidably guided by the connecting shaft 32. The lower end of the connecting shaft 32 is connected to a clamp cylinder 33 installed below the holding table 23 via a connecting plate 34.

FIG. 3 shows the mandrel holding device 14, in which a cylinder body 35 is installed on the slide base 12,
A piston 36 is fitted into the cylinder body 35 so as to be slidable up and down by a predetermined amount, and a center 37 that supports the lower end of the mandrel M is fitted into the piston 36 in an upward direction. A pair of guide members 38 and 39 are also installed on the slide base 12 so as to face each other on both sides of the center 37, and the flange portion MO of the mandrel M is connected to these guide members 38 and 39 in the sliding direction of the slide base 12. Guide grooves 38a and 39a are formed for slidably guiding in parallel directions. A pressing block 4I that presses the positioning pin M2 of the mandrel M carried into a predetermined position toward the reference block 40 is slidably fitted into one of the guide members 39, and this pressing block 41 serves as a phase determining cylinder. It is designed to advance and retreat at 42.

FIG. 4 shows the centering device 16, and shows the frame 1.
As shown in FIG. 1, a centering head 46 that is raised and lowered by an elevating cylinder 45 is mounted on the main body 44 fixed to the main body 5 so as to be movable up and down. A pressing sleeve 47 is rotatably supported on the centering head 46 around a vertical axis, and the lower end of the pressing sleeve 47 is connected to the centering head 46. It protrudes from the lower end of. A centering shaft 48 is installed concentrically within the pressing sleeve 47, and the tip shaft portion of the centering shaft 48 slightly protrudes from the lower end of the pressing sleeve 47.
A tapered surface is formed at the protruding end. The outer diameter of the tip shaft portion of the centering shaft 48 is equal to the center hole W1 of the workpiece W.
The dimensions are determined to provide a tight fit. Centering head 46
A phasing pin 49 that fits into the positioning hole W2 of the workpiece W is also fitted into the phasing pin 49 so as to be movable up and down.
9 is moved forward and backward by a phase determining cylinder 50 installed on the centering head 46.

5 and 6 show the charging device 17,
As shown in FIG. 1, a charging head 55 is mounted on a main body 52 fixed to the frame 15 so as to be vertically movable, and is raised and lowered in two stages by first and second lifting cylinders 53 and 54. . A cylinder 56 is formed in the charging head 55,
A piston 57 is fitted into the cylinder 56 so as to be slidable up and down by a predetermined stroke. A center 58 for supporting the upper end of the mandrel M is fitted in the piston 57 so as to be able to slide vertically, and the center 58 is normally placed at the lower end with respect to the piston 57 due to the repulsive force of a spring 59 inserted between the piston 57 and the center 58 . is maintained. A cylinder 60 is also formed in the charging head 55 in parallel with the cylinder 56, and a piston 6 is provided with a support pin 61 projecting from the cylinder 60 to centrally support the upper end of the positioning pin M2 of the mandrel M.
2 is fitted in a vertically slidable manner.

A pair of clamp claws 63 for clamping the work W are pivotally supported at the tip of the charging head 55,
This clamp claw 63 is always acted in the direction of closing (clamping) by the repulsive force of the spring 64. An unclamping cylinder 65 is formed in the charging head 55, and an actuating member 67 for pressing the clamp claw 63 in the unclamping direction against the spring 64 is provided at the tip of the piston roller 6 of the unclamping cylinder 65. installed.

Next, the operation in the above configuration will be explained.

In the state shown in FIG. 1, the workpiece W is carried onto the workpiece holding surface 24a of the workpiece holding device 13 by an unillustrated carrying-in device and temporarily positioned by the holding shaft 25. As shown in FIG. Subsequently, the centering head 46 is lowered by the lifting cylinder 45, and the centering shaft 48 comes into contact with the upper surface of the holding shaft 25, and the holding shaft 2
5 is lowered against the spring 26 to tightly fit into the center hole W1 of the workpiece W, thereby centering the workpiece W. After that, the pressing sleeve 47 comes into contact with the upper surface of the workpiece W, and
is held between the holding sleeve 24. Next, the phasing cylinder 50 lowers the phasing pin 49 and presses it against the upper surface of the workpiece W, and the indexing cylinder 29 moves the holding sleeve 2 through the rack and pinion mechanism.
4 is rotated, whereby the workpiece W and the pressing sleeve 4
7 and the centering shaft 48 are rotated together with the holding sleeve 24. The positioning hole W2 of the workpiece W is the phase determining pin 4
When indexed to the angular position corresponding to 9, the phase pin 49 is thrust into the positioning hole W2, thereby preventing rotation of the workpiece W and positioning the positioning hole W2 at a predetermined angular position.

In this state, the clamping cylinder 33 causes the clamping claw 3 to
1 is pivoted to clamp the centered and phased workpiece W onto the workpiece holding surface 24a.

This state is shown in FIG. The centering head 46 is then raised.

When the predetermined operation of the workpiece holding device 13'2 is completed, the slide base 12 is shifted by a predetermined amount by the shift cylinder 18, the workpiece holding device 13 is indexed to a position corresponding to the charging device 17, and the mandrel holding device 13 is indexed to a position corresponding to the charging device 17. Device 14 is indexed into a position corresponding to mandrel pool 19.

In this state, the charging head 55 is lowered by a predetermined amount by the first lifting cylinder 53, the support pin 61 passes through the positioning hole W2 of the workpiece W, and the lower surface of the charging head 55 is brought into contact with the upper surface of the workpiece W. Ru. Subsequently, the actuating member 67 is raised by the unclamping cylinder 65, and the clamp claw 63 is pivoted by the repulsive force of the spring 64, and the workpiece W, which is centered and phased, is placed on the workpiece holding device 13 at the charging head. Clamp to the bottom surface of 55.

This state is shown in FIG. Thereafter, the clamp claw 31 is unclamped by the clamp cylinder 33, and the charging head 55 is raised. The work W whose centering and phasing have been determined in this way is transferred from the work holding device 13 to the charging head 55 side.

On the other hand, the mandrel holding device 14 has a mandrel L/)
A predetermined mandrel M stored in the Li 7''-ru 19 is carried in by the mandrel transfer device 2o, and the flange portion MO of the mandrel M is guided by the guide members 38 and 39 and set at a predetermined position.Subsequently, the piston 36 is raised and the center 37 engages with the lower end of the mandrel M to position the mandrel M, and the phasing cylinder 4
2, the pressing block 41 presses the positioning pin M2 to a position where it makes one contact with the reference plate 40, thereby positioning the positioning pin M2 at a constant angular position.

When the workpiece W, which has been centered and phased as described above, is transferred to the loading device 17, the slide base 12 is shifted by a predetermined amount by the shift cylinder 18, and the workpiece W, which has been centered and phased, is transferred to the loading device 17.
The state returns to the state shown by the solid line in the figure.

In this state, the charging head 55 is lowered again by the first lifting cylinder 53, and the center 58 is engaged with the upper end of the mandrel M, as shown in FIG.
1 is engaged with the upper end of the positioning pin M2, and the mandrel M
And the axis of the positioning pin M2 is accurately maintained in a vertical state. However, in this state, the center hole W1 of the workpiece W clamped by the piston 57 is connected to the charging shaft part M1 of the mandrel M.
The positioning hole W2 is fitted into the positioning pin M.
2, and the workpiece W is loaded to the position shown by the two-dot chain line in FIG. In that state, unclamp cylinder 6
5, the clamp claw 63 is unclamped against the spring 64, and in this state, the second lifting cylinder 54
As a result, the charging head 55 is continuously lowered, and the workpiece W is loaded to a predetermined position as shown in FIG.

Meanwhile, during this time, the work W is carried into the work holding device 13 in the same manner as described above, and is centered and phased by the centering device I6. In this way, the workpiece holding device 1
3, the workpieces W carried in are centered and phased and sequentially mounted on the mandrel M. When a predetermined number of workpieces W are loaded onto the mandrel M, the mandrel M is held by the mandrel transfer device 20. The workpiece W is transferred from the device 14 to the mandrel pool 19, and then a nut runner (not shown) tightens a nut onto the threaded portion M3 of the mandrel M, and the mandrel M is conveyed to a processing device by a conveyor for processing the workpiece W.

In the above-mentioned embodiment, an example was described in which the workpiece W is centered and phased and fitted and charged into the charging shaft M1 and the positioning pin M2 of the mandrel M, but there is no need to phase the workpiece W. As for the workpiece, it is sufficient to simply center the workpiece W and load it onto the charging shaft M1 of the mandrel M.

Further, in the above embodiment, an example was described in which a plurality of works W are mounted on the mandrel M, but one
Of course, only one wall W may be attached.

<Effects of the Invention> As described above, in the present invention, the centering shaft is fitted into the center hole of the carried-in workpiece to center it, and the workpiece is delivered to the charging head, and the workpiece is transferred to the charging head. Since it is configured to be loaded into a shaft member such as a mandrel, it has the feature that even if the fitting tolerance between the shaft member and the workpiece is severe, the workpiece can be automatically loaded into the shaft member accurately and reliably.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view showing the entire centering and charging device, and FIGS.
4 and 5 are enlarged sectional views showing details of parts vr- in Figure 5
The cross-sectional views taken along the -vr line and FIGS. 7 to 10 are diagrams showing the operating state of centering and charging. 12...Slide base, 13...Work holding device, 14... Mandrel holding device, 16... Centering device, 17... Charging device, 18... Shift cylinder, 19... Mandrel Boo JL/, 24... Holding sleeve, 25... Holding shaft , 31...clamp claw, 3
7... Center, 38.39... Guide member, 45...
・Lifting cylinder, 46... Centering head, 48...
・Centering shaft, 53.54... Lifting cylinder, 55・
...Charging head, 58...Center, 63...Clamp claw, W...Workpiece, Wl...Center hole, M...Mandrel (shaft member). Patent applicant Toyota Machinery Co., Ltd. Figure 2 Figure 3 Figure 8 (50 9

Claims (3)

[Claims] (1) A centering and loading device that centers a workpiece having a center hole and automatically loads it into a shaft member, a workpiece holding device that holds the carried workpiece, and a workpiece holding device that positions and holds the shaft member in a vertical state. a shaft member holding device; a centering device that includes a centering shaft that fits into a center hole of a workpiece held by the workpiece holding device and centers the workpiece; and a centering device that centers the workpiece by the centering device; A centering/charging device comprising a charging device having a charging head that receives the workpiece from the workpiece holding device and inserts the workpiece into the center hole of the shaft member by fitting the workpiece into the shaft member. (2) The centering and charging device according to claim 1, wherein the shaft member holding device includes a center that supports the lower end of the shaft member, and the shaft member is positioned and held by the center. (3) The loading device includes a center that supports the upper end of the shaft member, and the workpiece is loaded into the shaft member with both ends of the shaft member supported by this center and the center of the shaft member holding device. A centering and charging device according to claim 2.