JPH02165836A - Automatic loading and unloading method for work by roll forming use spinning machine in manufacture of wheel made of light allot by forging - Google Patents

Abstract

PURPOSE:To improve workability and productivity by separating a work from a die of a main spindle side by a movement of a knockout shaft, separating the work from the die by an ejector means, and therefore, loading and unloading automatically the work. CONSTITUTION:When roll forming is completed, a rotation of a main spindle 12 is decelerated, and it stops at a fixed position by an output signal from a controller. Subsequently, a knockout shaft 13 is slid in the AR direction, a work 60 moves in the BR direction together with a die 9, a driven shaft 16 and a stroke shaft 17 and stops at the right end, and the work 60 is separated from a die 8. Next, the work 16 is supported by the tip part of an ejector pin 15, a robot device operates by a signal by which the movement to the left of the knockout shaft 13 is completed, a finger holds the work 60, and it gets rid of a spinning machine 17 and placed on a conveyor for moving to the next process. The next work carried to the end part of the conveyor is held by the finger of the robot device, moved to the die 9 and loaded therein and by a completion signal, the work 60 is sandwiched in the die 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for automatically attaching and detaching a workpiece using a spinning machine for roll forming in the production of a light alloy forged wheel.

[Conventional technology and its problems] Conventionally, when manufacturing a light alloy wheel by forging, first a cylindrical material made of a light alloy such as an aluminum alloy is die-forged into a substantially cylindrical shape with a disk portion. A wheel prototype was made, and this prototype (hereinafter referred to as the work) was held between molds fixed to the main shaft and driven shaft of a spinning machine, and the inner rim was formed by roll forming.

However, in the above-mentioned conventional roll forming process, the worker attaches each workpiece to the spinning machine one by one, and when the workpiece is attached to the mold, the worker carefully checks the uneven surface of the mold and the pattern of the workpiece. Due to the structure of the workpiece, it is not possible to see through the mating surface, so it is very difficult to perfectly match the workpiece to the mold.
If the workpiece is inserted without matching, the workpiece and the mold will come into unnecessary contact, causing scratches and bruises on the design surface of the workpiece that are harmful to the product. Furthermore, when removing the workpiece from the spinning machine after the roll forming process is completed,
Since the mold and the workpiece are in close contact with each other due to the so-called biting phenomenon, there is also the problem that an operator has to hit the workpiece with a plastic hammer or the like to remove it.

[Problem 8 to be solved by the invention] The present invention solves the above-mentioned conventional drawbacks, and automatically carries out mounting of a workpiece and removal of the workpiece after processing is completed without bothering the operator. The purpose of the present invention is to provide a method for automatically attaching and detaching a workpiece using a spinning machine that is equipped with the functions necessary for this purpose.

In this invention, a workpiece forged into a substantially cylindrical shape with a disk portion as a material for a light alloy wheel is held and moved from a predetermined position by a robot device, and then placed in the mold of a spinning machine whose main shaft is previously stopped at a fixed point. After installation and roll forming, the workpiece is separated from the mold on the main spindle side by moving the knockout shaft, then the workpiece is slightly separated from the mold on the driven wheel side by the ejector means, and then the workpiece is removed again by the robot device. A workpiece produced by a spinning machine for roll forming in the manufacture of light alloy forged wheels, characterized by repeating a series of processes for holding and moving the workpiece to a predetermined position, and automatically attaching and detaching the workpiece. This is an automatic attachment/detachment method.

[Function] By stopping the mold at a fixed point, the workpiece can be mounted at the same position at all times, and by mounting the workpiece onto the mold stopped at a fixed point using a robot device, the pattern of the workpiece can be adjusted to match the irregularities of the mold. It becomes possible to match the surface and automatically fit it continuously. Furthermore, by slightly separating the workpiece on the driven side from the mold by the ejector device, it becomes easy to remove the workpiece by the robot device.

[Example] Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a schematic plan view showing a case in which a robot device is combined with an embodiment of the spinning machine. (4) is a conveyor for conveyance, which is approximately cylindrical and has a disk portion made of a light alloy formed by forging in the previous process, and various patterns (5) are formed on the disk portion. ) is configured (6)
are sequentially moved one by one to the specified holding position of the fingers (3) in accordance with the forming process of the spinning machine (7). As shown in FIG. 4, these works (6) are placed side by side on the conveyor (4) at fixed positions with the pattern (5) on the disk section having a constant phase, and are controlled by a control device (not shown). - Controlled to stop at a fixed position. On the other hand, in the spinning machine (7), (8) is a die on the driving side, and (9) is a die on the driven side, and the die (9) is fully retracted to the right in the figure. Therefore, there is sufficient space between the mold (8) and the mold (9) to allow the workpiece (6) to be exchanged. Next, the robot device (
The workpiece (8) is held by the fingers (3) of 1) and moved to the spinning machine (7). At this time, the spinning machine (7) is held at a certain position by the aforementioned control device. The rotation of the C motor installed in the spinning machine (7) is controlled and stopped at a fixed point by a signal from the center. This is as shown in Figures 5 and 6.
The ribs (30) constituting the unevenness of the workpiece (6) are no longer needed when mounting the uneven surface (29) that matches the unevenness of the pattern (5) provided on the driven side mold (9). This is done to prevent collisions. In this embodiment, only the mold (9) is provided with the uneven surface (29), but if the rib portion (30) has a cross-sectional shape such as an I-shaped cross section, it is natural that the mold Both (9) and (8) need to have an uneven surface that matches the wheel pattern.
0 In addition, as another embodiment of the mold, as shown in FIG.
, (41), the driven side mold (9
0), a protrusion (
42), and the protrusion (42) is inserted into the through hole (40) when the workpiece (6") is mounted, as shown in the cross-sectional view of FIG. In addition, although not shown, a case in which the disk portion has both irregularities and through holes is also constituted as another embodiment of the mold.

However, in the previous embodiment, the workpiece ([1) carried by the finger (3) is the mold (9) or
It becomes possible to smoothly fit and attach the metal mold (9) to the uneven portions that match the pattern (5) provided on the metal mold (8). Then, the mold (9) moves to the left in the figure, and the workpiece (5) is held between it and the mold (8).

Thereafter, roll forming is carried out using a predetermined known method to form the inner rim (10) and outer rim (11) shown in FIG. I'll omit the explanation. FIG. 2 is a longitudinal cross-sectional view showing the main parts of a spinning machine according to an embodiment of the present invention at the end of the roll forming process, where (60) is the workpiece after the roll forming process, and (12) is the main shaft. , mold at the tip (8)
is fixed by screwing, and (13) is a knockout shaft, which is slidably inserted into the main shaft (12), and whose tip is in contact with the disk part (14) of the workpiece (BO), (15) is the ejector bin, (1B) is the driven shaft, (17) is the stroke axis, and the stroke axis (
A driven shaft (1B) is fitted into the driven wheel (17) via bearings (1g) and (1g), and a mold (9) is fixed to the driven wheel (16) by screwing. The tip of the ejector bin (15) protrudes through the center hole of the workpiece (60), the middle part is fitted into the mold (9), and the base part is inserted into the four parts (16) of the driven shaft (16). Disc (2) screwed onto (19)
0) is fitted with a disc spring (21) as an example of a pressing member and fixed by a nut (22), thereby forming an ejector device. (23) is a spline member provided in the direction of the outer peripheral axis of the driven shaft (16), (24) is an annular gear, (25) is an electromagnetic brake, and the shaft (26) of the brake (25) is equipped with a gear. (27) is fitted, the gear (27) meshes with the annular gear (24), and (28) is a frame that fixes the shaft (26).

Next, regarding the method for automatically loading and unloading a workpiece using the spinning machine configured as described above, the operation contents and signal flow will be explained for each step in sequence.

First, when the roll forming process is completed, the rotation of the main shaft (12) is decelerated and stopped at a fixed position by an output signal from the control device. Then, the electromagnetic brake (25) is activated to make the driven shaft (1B) unrotatable.

At this time, a signal indicating that the conveyor (4) has conveyed the workpiece (6) to a predetermined position is input to the control device. Then, the pressing force from the stroke axis (17) is released,
The knockout shaft (13) is slid in the direction of arrow AR,
As a result, the workpiece (60) is attached to the mold (9), the driven shaft (l
B), moves along with the stroke axis (17) in the direction of the arrow BR force, and stops at the rightmost end. This result work (60)
is removed from the mold (8) and separated. When the knockout shaft (13) begins to move backward in the left direction of the arrow AL, the ejector bin (15) is released from the pressing force of the knockout shaft (13) and at the same time is left to the left by the elastic force of the disc spring (21). The workpiece (60) moves about 2 to 5 steps in the direction shown in FIG. 3, and is instead pulled away from the mold (9). ), where the robot device (1) starts operating upon receiving a signal that the knockout axis (13) has completed its left movement, and the finger (3) moves the workpiece (60
) is removed from the spinning machine (A) and placed on the conveyor (31) for the next process shown in FIG. Next, the next workpiece (6) conveyed to the end of the conveyor (4) is held by the fingers (3) of the robot device (1), moved to the mold (9) and mounted thereon, and completed. In response to the signal, the stroke axis (17) moves forward in the BL force direction to move the workpiece (
6) is held between the mold (8). At this time, the arm (2) of the robot returns to the original position shown in FIG. After the stroke axis (17) has completed its movement to the left end, a signal is sent to the electromagnetic brake (25) and the brake is released. Then, the process returns to the first step and repeats the same operation, and this series of workpiece loading, roll-forming, and removal is repeated to continuously roll-form the workpiece.

〔Effect of the invention〕

The present invention provides an uneven surface or a projection that at least partially matches the unevenness, through hole, etc. of the pattern on at least one mold of a spinning machine for roll forming a workpiece having a pattern on at least one side of the disk portion. etc., which is equipped with a fixed point stopping means for the mold and an ejector means for ejecting the workpiece from the driven mold, so that the workpiece is automatically mounted and roll-formed, Then, when releasing, the workpiece can be accurately moved to a fixed position, and the workpiece can be mounted without unnecessary contact between the workpiece and the mold, and after molding, the workpiece can be attached to the mold on the driven shaft side. It can also eliminate the biting phenomenon.

Further, by using this spinning machine and automatic attachment/detachment using a robot device, it is possible to automatically perform roll forming work of the workpiece.

As described above, the present invention has the revolutionary effect of improving workability by saving labor in the roll forming process of a light alloy forged wheel, and improving productivity by automation.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing a case where a robot device is combined with a spinning machine used in an embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of main parts of the spinning machine shown in FIG. 1. , FIG. 3 is a longitudinal sectional view showing one operating position of the embodiment spinning machine shown in FIG. 2, FIG. 4 is a plan view showing an example of a work pattern, and FIG. 6 is a side view showing the uneven surface of the mold on the side; FIG. 6 is a cross-sectional view taken along line C-C in FIG. 5 showing the positional relationship with the work; FIG. 7 is a side view showing the uneven surface of the mold. FIG. 8 is an enlarged sectional view taken along the line DD in FIG. 7 with a portion omitted; FIG. [Explanation of symbols] 1...Robot device 6.60...Work 7...Spinning machine 8...Mold 9 on the spindle side... ...Mold 13 on the driven shaft side...Knockout shaft 14...Disk portion 15...Ejector bin 40.41...Through hole 42... ····protrusion

Claims (1)

[Claims] 1. A workpiece forged into a roughly cylindrical shape with a disk portion as a material for a light alloy wheel is held and moved from a predetermined position by a robot device, and mounted on the mold of a spinning machine whose main shaft has been stopped at a fixed point in advance. After the roll forming process, the workpiece is separated from the mold on the main shaft side by moving the knockout shaft, and then the workpiece is slightly separated from the mold on the driven shaft side by an ejector means, and then the workpiece is held by the robot device again. Automatic attachment and detachment of workpieces using a spinning machine for roll forming processing in the manufacture of light alloy forged wheels, characterized in that the workpieces are automatically attached and detached by repeating a series of steps to move them to predetermined positions. Method.