JPH0319745A - Workpiece conveyer - Google Patents

Abstract

PURPOSE:To compactly form a workpiece conveyer total unit with the upper moving amount of a holding part in a degree corresponding to almost the height of a holder, when a workpiece is conveyed to the next process, by providing the holder, which is for supporting the lower end part of the lifted workpiece after its work is performed, so as to be freely movable on a mold in advance and retreat. CONSTITUTION:A workpiece 17 is lifted to the upper by a holding part and conveyed to the next process by detaching the lower end part from a holder 14. Here the workpiece 17 is supported in a condition that it is previously lifted on a mold 12 by the holder 14. Consequently, a relatively small amount of upper movement of the holding part is required only by lifting the workpiece 17 from the holder 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a workpiece conveyance device in machining.

[Prior Art] For example, when draw processing and press processing are continuously performed on a pipe, it is known to automate the process using a robot to convey the processed product of each step to the next step. In this case, the robot generally has an arm that is provided with a holding part such as a chuck at the tip for holding the workpiece and moves intermittently in the vertical and horizontal directions.

, [Problems to be Solved by the Invention] By the way, when the lower end of the workpiece is moved (lifted) above the mold surface by the holding part after processing such as draw processing, and then moved in the horizontal direction, the holding part is The amount of movement in the vertical direction becomes considerably large, resulting in an increase in the size of the entire conveying device.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a workpiece conveyance device that can reduce the amount of vertical movement of a holding section as much as possible.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a holder for supporting the workpiece on the mold in a state where the lower end of the workpiece is lifted above the mold after processing. It is characterized by being freely installed.

[Operation of the Invention] After processing, the workpiece is lifted from the mold, and when its lower end is moved above the mold surface, the holder advances and moves onto the mold, thereby supporting the lower end of the workpiece. Therefore, the workpiece is lifted upward by the holding section, the lower end is separated from the holder, and the workpiece is transported to the next process. At this time, since the workpiece is previously supported by the holder in a state of being lifted onto the mold, the amount of upward movement of the holder is only required to lift the workpiece from the holder, and is relatively small.

[Example] Figure 1 shows an automatic processing device that performs a series of press operations.
It shows the automated equipment used in the process of drawing both ends of the pipe into a small diameter, and includes a hopper 1, an intermediate stand 2,
It is composed of a conveyance device 3, a mold stand 4, a pedestal 5, a transfer conveyor 6, and the like.

The hopper 1 is for supplying a pipe cut to a suitable length in advance while maintaining it at a constant temperature. The intermediate stand 2 is for taking out the pipes from the hopper 1 and arranging them in advance for supplying them to the conveying device 3, and has a circular recess 7 approximately equal to the outer diameter of the vibrator formed on its surface.

The transfer device 3 is a robot, and includes a plurality of chuck-like holding portions 8 and a plurality of arms 9 each having a chuck-like holding portion 8 attached to the tip thereof (five pieces each in this embodiment).
An intermittent drive device 11 is used to move the slig 10 connected to the sligs 10, which are moved vertically and horizontally.

On the mold stand 4, lower molds 12 and 13 are provided, which will be described in detail later. Although not visible in FIG. 1, an upper mold is provided above the mold stand 4 (see FIG. 2).

The pedestal 5 has two holders l4 and 15 attached to the forked arm 1.
Each holder 14 and 15 is connected by a drive control means (not shown) in which the arm 16 moves forward and backward in the direction of the mold stand 4 in conjunction with the movement of each mold side and the holding part 8 side. can move forward and backward onto the lower molds 12 and 13, respectively.

2 to 6 are diagrams for sequentially explaining the draw processing process on the lower die 12 side. As shown in these figures, the lower die 12 has an inner diameter that is approximately equal to the outer diameter of the vibrator 17. A set portion 18, a tapered portion 19, and a narrow diameter constricted portion 20 are formed. Further, a bottle 21 is provided below the lower mold 12 and is capable of moving in and out of the constriction part 20, and is pushed up by a rod 22.

On the other hand, the upper mold 23 has the same structure as the lower mold 12, and the pipe 1
They are arranged symmetrically above and across 7. Further, an ejecting rod 25 is provided within the constriction portion 24 and can freely move in and out. Although the detailed structures of the lower mold 13 and the corresponding upper mold are not shown in the drawings, these also have the same structure as the lower mold 12 and the upper mold 23, respectively. However, only the inner diameter of each constricted part is smaller, and the end 17a of the vibrator 17 is constricted in two stages to create a narrow diameter part 26.
(See Figure 3).

As shown in FIG. 4, the polder 14 is provided with a recess 27 that can accommodate the lower end of the narrow diameter portion 26. Although not shown, the inner diameter of the recess 27 of the holder 15 is naturally smaller.

The holding portion 8 is adapted to operate along the movement path shown in FIG. That is, the holding part 8 first moves downward and holds the pipe 17, which has been set in an upright state (step), then lifts it upward (step ■), and moves horizontally to the next process side. (Step ■), moves downward again to set the next process (Step ■), releases the pipe 1, and returns to the initial position by upward and horizontal movement (Step ■). Note that the intervals between the adjacent holding parts 8 are equal, and the respective movement amounts correspond to the intervals between the recesses 7, between the recesses 7 and the lower mold 12, and between the lower mold 12 and the workpiece 3.

Next, to explain the process of draw processing, first, Figure 2 shows the step of setting the vibrator 17 onto the lower mold 12 and performing the first draw process, and Figure 3 shows the state after the first draw process. . Through the steps ① to ② (Fig. 7) described above,
The holding part 8 moves and sets the pipe 17, which has been set in advance in the recess 7 of the intermediate stand 2, onto the lower mold 12 and then releases it. When the holding part 8 returns (step ■), the upper mold 23 descends. . When the upper die 23 is lowered in this state, the end portion 17a of the vibrator 17 is squeezed by the constricting portions 20 and 24 at both the upper and lower ends, and becomes a narrow diameter portion 26 shown in FIG. 3.

The thus-formed first draw-processed product is again transferred onto the adjacent lower die 13 by the holding section 8 and subjected to the second draw process. Therefore, the steps from demolding to setting in the second draw process will be explained with reference to FIG. 4 and subsequent drawings.

First, as shown in FIG. 4, when the upper mold 23 is raised while pushing up the bottle 21 with the rod 22, the vibrator 17 is raised together with the upper mold 23. The lower end of the narrow diameter portion 26 is the holder 1
4, the pedestal 5 is actuated by the drive control device, the arm 16 moves forward, the holder l4 advances onto the lower mold 12, and the narrow diameter portion 26
Move directly below. Therefore, when the upper end of the narrow diameter part 26 is pushed downward by the ejecting rod 25, the pipe 17 separates from the upper mold 23 and descends, and the lower end of the narrow diameter part 26 fits onto the recess 27 of the holder 14 ( Figure 5). This state is similar to the state in which the pipe 17 was set on the intermediate stand 2 in the first drawing process. Therefore, as in the case of the first draw process, the holding section 8 is operated to transfer and set for the second draw process.

That is, as shown in FIGS. 6 and 7, the holding part 8 is moved downward again, grasps the circumference of the pipe 17, lifts it, and moves it onto the adjacent lower mold 13 (see FIG. 1).
(corresponds to steps ■ to ■ shown by dotted lines in the figure). Thereafter, a second draw process is repeated from the state shown in FIG. 2 to further draw the narrow diameter part 26, and then the pipe 17 is moved onto the adjacent transfer conveyor 6 and subjected to the next process, such as a press. Transfer to processing.

In this way, by providing the boulder 14, the holding part 8
The amount of vertical movement can be reduced. That is, after the draw process, the end of the pipe 7 shown in FIG. 2 becomes the narrow diameter part 2 shown in FIG.
6 is extra long by the length L, so unless the holder 14 (15) is provided and the holding part 8 is not moved upward by at least this length, the holding part 8 will be removed from the lower mold 12. Cannot be demolded. However, holder 14 (15)
If the lower end of the narrow diameter portion 26 is supported on the lower mold 12 in advance by About a hour is enough. Here, since h is clearly much smaller than L, the amount of upward movement of the holding portion 8 is significantly small.

Therefore, the amount of movement of the slider 10 is reduced and the intermittent drive device 11 can be downsized, so the entire device becomes compact and the installation space can be saved significantly.

[Effects of the Invention] The present invention provides a holder capable of supporting the lower end of the workpiece when it is lifted above the mold surface, which can move forward and backward onto the mold. Since the amount of upward movement of the part can be approximately equivalent to the height of the holder, the amount of upward movement can be significantly reduced compared to the case where no holder is provided. Therefore, the entire processed product conveyance device can be made compact, and as a result, the installation space of the device can be greatly saved.

[Brief explanation of the drawing]

Figures 1 to 7 show examples, Figure 1 is a schematic diagram of the entire draw processing device, Figures 2 to 6 are sectional views showing the processing steps, and Figure 7 shows the operation of the holding section. It is a figure for explaining. (Explanation of symbols) 3... Conveyance device, 4... Mold stand, 5... Rest, 8
...Holding part, 12, 13...Lower mold, 14, l5...
-Holder, 16...arm, 17...pipe.

Claims (1)

[Claims] For supporting the lower end of the lifted workpiece after processing in a device that lifts the workpiece above the mold and transports it to the next process using a holding part that is movable vertically and horizontally. A machined product conveyance device characterized by a holder that can be moved forward and backward over a mold.