JPH0241378B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold mounting device for attaching a pair of sub-molds facing each other between the main molds to a pair of main molds facing each other. be.

A type of press that performs plastic processing such as punching, bending, and drawing on metals and other materials includes a pair of opposing main dies that are placed relatively close to each other and are driven relatively close to each other and separated from each other; Some machines include a pair of sub-dies that are arranged opposite to each other between the dies and perform press working by the approaching movement of the main die. For example, in a press equipped with a progressive die that simultaneously performs two or more stages of press work while sequentially feeding a strip of plate material, a secondary die is used to punch out small parts from other parts of the same plate material, separate from the press work. It is assembled into the above-mentioned progressive mold as the main mold.

FIG. 1 shows a part of the main mold to which the sub-mold has been assembled. In the figure, reference numeral 1 denotes a lower mold that constitutes one of the main molds, and is paired with an upper mold (not shown) provided above the lower mold 1 to face each other. On the opposing surfaces of the lower mold 1 and the upper mold, a die 2 and a punch 3 as sub molds are respectively attached with socket bolts 4.
When the punch 3 is driven to approach the die 2 together with the upper die (not shown), a thin plate material 5 is sent over the die 2 in conjunction with the approach and separation movement of the upper die.
Now, press working using the main die and punching process using the sub-die are performed simultaneously.

However, in such conventional presses, when replacing the sub-die for setup changes, etc.,
Since the secondary mold is attached with a bolt with a hole 4, it is extremely easy to attach the secondary mold to the opposing surface of the main mold that is arranged relatively close to each other and adjust the facing relationship between the secondary molds. This requires troublesome work, and since such presses generally carry out highly efficient press processing, it may be necessary to stop the production of the main press product by stopping the operation of the press for a long period of time. Replacement was virtually impossible.

The present invention has been made against the background of the above-mentioned circumstances, and its object is to provide a mold attaching device that allows a sub-die to be easily and quickly attached to a main die.

In order to achieve such an object, the present invention provides a sub-mold mounting device for attaching a sub-mold to a main mold in the press, comprising: (2) a guide rod and a guide hole that are slidably fitted into the sub-molds and guide the sub-molds so as to be able to approach and separate from each other while maintaining their opposing relationship; (3) a fitting formed on an opposing surface of one of the pair of main molds and fitting with one of the pair of secondary molds; a fixing device having a groove and removably fixing one of the sub molds to one of the main molds in a state where the guide rod is parallel to the driving direction of the main mold, and the main mold is removed. The invention is characterized in that the pair of sub-die molds can be attached and detached and replaced while maintaining their opposing relationship.

In this way, since the guide rod and the guide hole are provided in the pair of sub-molds, the opposing relationship between them is maintained in advance with high precision, so the pair of sub-molds can be separated separately. The complicated work is eliminated because it is attached to a pair of main molds while maintaining the opposing relationship. At the same time, one of the secondary molds is removably fixed to one of the main molds while being fitted into a fitting groove formed in one of the main molds, so there is only a short press stop time. Inside, the sub-mold can be removed and a new sub-mold can be reliably fixed in place. Therefore, the sub-die can be replaced with almost no reduction in the operating rate of the press, making it possible to change the setup of the sub-die according to the desired production plan, and press processing using the sub-die is possible. This eliminates the loss of material caused by producing more press products than necessary, such as small parts.

Hereinafter, an embodiment to which the present invention is applied will be described in detail based on the drawings.

In FIG. 2, reference numeral 10 denotes a lower die forming one side of a main die for progressive feeding to which a plurality of dies (not shown) for performing a plurality of press workings are fixed, and a portion relatively close to and above the lower die 10 is An upper mold (not shown) is disposed opposite to the lower mold 10 and driven toward and away from the lower mold 10 by a drive device (not shown). A punch corresponding to the die provided in the lower mold 10 is fixed to the upper mold, and a strip-shaped thin plate 12 is sent sequentially over the lower mold 10 in conjunction with the approach and separation movement of the upper mold. A plurality of press operations including punching operations are performed simultaneously, and the upper and lower dies 10 constitute a pair of main dies. The thin plate material 12 in FIG. 2 has already been punched into a circular shape using the main die.

A sub-press die 14 equipped with a pair of sub-dies for punching small items is arranged between the upper die and the lower die 10, and press processing is performed according to the approaching and separating movements of the upper die. It's summery. That is, one press is configured with these main molds and the sub-press mold 14, and the main press product, which is ultimately punched into a circular shape into a single thin plate 12, is subjected to multiple stages of press processing. Two press processes for punching out small items are performed at the same time.

As shown in FIG. 3, the sub-press die 14 has two guide rods 18 on the top surface of a die 16 for punching small items, which constitutes one of the sub-dies, with a stopper 17 screwed onto the tip. A guide bush 26 having a guide hole 24 that slidably fits into the guide rod 18 is provided on the punch holder 22 which stands vertically and has the punch 20 fixed thereto. The punch 20 can be moved toward and away from the die 16 while maintaining the relationship accurately.
That is, the punch 20 and the punch holder 22 form the other side of the sub-die. A spring receiver 28 is provided at the lower end of the guide rod 18, and a compression coil spring 30 is inserted between the spring receiver 28 and the guide bush 26 with the guide rod 18 inserted therethrough, and the punch 20 is inserted into the spring receiver 28. The punch holder 22 is urged in a direction away from the die 16 and is brought into contact with the stopper 17. A stopper 32 is provided at the center of the outer end surface of the die 16, and a notch 36 of a predetermined shape that can be engaged with a presser plate 34, which will be described later, is formed at the upper portions of both ends of the inner end surface. The corners are said to be thin. Note that 37 is a stripper that prevents the thin plate material 12 from lifting after pressing.

The sub-press mold 14 configured in this way has a fitting groove 38 formed on the upper surface of the lower mold 10 of the main mold.
It is removably attached therein by a stopper 32 and a presser plate 34. That is, the fitting groove 3
8 is formed from the outer edge of the upper surface of the lower mold 10 toward the inner side of the lower mold 10 with substantially the same width as the lateral width of the die 16, and connects the die hole 40 of the die 16 and the lower mold 1.
The length is set such that movement of the die 16 toward the inside of the lower mold 10 can be prevented at a predetermined position where the punch hole 42 provided in the die 10 substantially coincides with the punch hole 42 provided in the die 10 . Further, the depth of the fitting groove 38 is such that the upper surface of the die 16 fitted in the fitting groove 38 and the upper surface of the main pressed product processing die (not shown) provided in the lower mold 10 are approximately on the same plane. The depth is determined so that the thin plate material 12 can be smoothly fed over those dies, and the axial direction of the guide rod 18 of the sub-press mold 14 and the drive of the upper mold of the main mold are The directions are parallel to each other, so that the punch holder 22 can be smoothly driven by the upper die.

The stopper 32 includes a frame 46 having a U-shaped cross section and a frame 46 that is fixed to the outer end surface of the die 16 and forms a rectangular hole 44 between the end surface of the die 16 and the rectangular hole 4.
4 and engages with a rectangular engagement hole 48 bored in the lower mold 10 with the sub-press mold 17 in contact with the tip of the fitting groove 38.
It consists of a letter-shaped engagement piece 50 and a guide pin 54 that projects from the end face of the die 16 and is engaged with a longitudinal guide hole 52 provided in the engagement piece 50. As shown in FIG. 4, notches 56 and 58 are provided at two locations in the vertical direction at one end of the engaging piece 50, and the notches 56 and 58 are provided within the frame 46. 58
A ball 60 that engages to position the engagement piece 50 in the second position and a spring 62 that biases the ball 60 toward the engagement piece 50 are provided. That is, an engaged position where the engaging piece 50 is positioned downward and engages with the engaging hole 48, and a non-engaged position where the engaging piece 50 is pulled out and disengaged from the engaging hole 48. The engagement piece 50 has notches 56 and 58 at two positions.
and the ball 60. Therefore, the notch 56 and the ball 6
0, the movement of the sub-press mold 14 toward the front side (outside) causes the engagement piece 50 to engage with the engagement hole 48. It is designed to be prevented by engagement. FIG. 4 shows this state. The frame 46 and the engaging piece 5 are arranged so that the upper end surface of the engaging piece 50 in the state engaged with the engaging hole 48 is approximately flush with the upper surface of the die 16.
0, the formation of the engagement hole 48 is determined.

The presser plate 34 is fixed with a part thereof protruding above the fitting groove 38, and is formed on the die 16 when the sub-press die 14 is brought into contact with the tip of the fitting groove 38. The notch 36 is adapted to be engaged with the notch 36 . Further, the thickness of the presser plate 34 is determined such that its upper surface is substantially flush with the upper surface of the die 16. In addition, the notch 36
The predetermined shape is such that the sub-press die 14 can come into contact with the tip of the fitting groove 38 even though the holding plate 34 is fixedly protruding above the fitting groove 38, and the holding plate 34 has a predetermined shape. This means a shape in which the lower surface and the upper surface of the notch 36 can just engage with each other.

In this way, the sub-press mold 14 is removably attached to the lower mold 10 by the fixing device constituted by the fitting groove 38, the stopper 32, and the presser plate 34, and the biasing force of the compression coil spring 30 The punch holder 22, which is brought into contact with the stopper 17 by the guide post 64, is driven by the operation of the upper die of the main die (not shown) which moves up and down guided by the guide post 64, and the punch holder 22 is driven by the movement of the upper die of the main die (not shown), which moves up and down guided by the guide post 64. Pressing and punching of small items by the sub-press die 14 are performed simultaneously. In addition, sub-press type 1
4 is fixed at a position where the guide rod 18 is removed outwardly from the surface of the upper mold when the upper mold approaches the lower mold, thereby preventing interference between the upper mold and the guide rod 18.

Next, the effects of this embodiment will be explained.

When attaching the sub-die, insert the sub-press die 14 for punching a pre-prepared product of a desired shape into the fitting groove 38 formed in the lower die 10 of the main die. After sliding and moving until they come into contact, the engaging piece 50 is pressed downward to position it at the engaging position. The sub-press mold 14 is
By simply pressing the engagement piece 50, it can be attached to the main mold with high precision and reliability. That is, by being fitted into the fitting groove 38, movement of the fitting groove 38 in the width direction is prevented, and movement in the vertical direction is also prevented by the holding plate 34. Tip and stopper 32
Since the engaging piece 50 prevents the fitting groove 38 from moving in the groove direction, the sub-press mold 14 is ultimately prevented from moving in any direction.

The attached sub-press die 14 is operated as the main die approaches and separates, and the die 16
The thin plate material 12 that is sequentially fed is subjected to press processing using the main die and punching of small items at the same time. FIG. 2 shows this state.

When the desired quantity of small products has been reached, the drive of the main mold is temporarily stopped, the engaging piece 50 is pulled out and positioned at the non-engaging position, and then the sub-press mold 14 is moved.
is pulled out to the front (outside of the lower die 10), the main die is restarted, and only the press work for the main press product is performed. Alternatively, if there are multiple types of desired small products, the driving of the main mold may be restarted after attaching another sub-press mold 14 to the lower mold 10 in the same manner as in the above case. Therefore, the press parts processed by the sub-die can also be produced in the required quantity in accordance with the production plan, and materials can be used effectively.

In this way, according to this embodiment, the sub-press mold 14
can be easily attached to the lower mold 10 by the fitting groove 38, stopper 32, and presser plate 34, so even if a pair of main molds are arranged relatively close to each other, The press die 14 can be attached to and detached from the main mold very easily and quickly, and a decrease in operating efficiency due to attachment and detachment can be almost eliminated.

Furthermore, since the opposing relationship between the pair of sub-dies is maintained in advance with high precision by the sub-press die 14,
This eliminates the complicated work of separately attaching the sub-molds to the main mold while taking into consideration their opposing relationship.

Furthermore, in this embodiment, the sub-press mold 14
vertical movement is prevented by the presser plate 34 and the notch 36, and the attachment and detachment of the sub-press die 14 only requires the operation of the engagement piece 50 of the stopper 32.
There is an advantage that attachment/detachment/exchange can be done more quickly.

Although one embodiment of the present invention has been described above in detail based on the drawings, the present invention may be applied to other aspects as well.

For example, in the embodiment described above, the stopper 32 is provided on the sub-press die 14, but the stopper 32 is provided on the lower die 10.
The distal end portion of the engaging piece 50 may be provided at the outer end surface of the die 16. Further, the engaging piece 50 of the stopper 32 is biased by a spring or the like, and is automatically engaged with the engaging hole etc. when the sub-press die 14 is positioned at a predetermined position. In this case, the sub-press mold 14 can be replaced more easily and quickly.

Further, a presser plate 34 and a notch 36 are provided to prevent vertical movement of the sub-press die 14, but a protrusion is formed at the lower side of the die 16 and a notch that can be engaged with the protrusion is fitted. It may also be formed at the lower side of the groove 38.

Further, in this embodiment, the sub-press mold 14 is attached to the lower mold 10 of the main mold, but a fitting groove is formed in the upper mold of the main mold so that the sub-press mold 14 can be attached to the upper mold. It may be configured to be attached to.

Furthermore, although only one sub-press die 14 is attached to the lower die 10 in this embodiment, a plurality of sub-press dies 14 may be attached, and the sub-press die 14 can be used not only for punching but also for bending,
It goes without saying that similar effects can be obtained by other pressing processes such as drawing.

The above-mentioned embodiment is merely one embodiment of the present invention, and the present invention can be modified in various ways without departing from the spirit thereof.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the main parts of a conventional press in which a sub-die is attached to a main die. FIG. 2 is a perspective view showing the main parts of a press equipped with a sub-mold mounting device according to an embodiment of the present invention. FIG. 3 is a cross-sectional view taken from the side in FIG. 2. Figure 4 is - of Figure 3.
FIG. 10: Lower mold (one side of the main mold), 16: Die (one side of the sub mold), 18: Guide rod, {20:
Punch, 22: Punch holder} (the other side of the sub-mold), 24: Guide hole, 30: Compression coil spring (spring), {32: Stopper, 34: Holding plate, 38: Fitting groove,} (fixing device) .

Claims (1)

[Scope of Claims] 1. A pair of opposing main molds that are arranged relatively close to each other and are driven relatively toward and away from each other; A press equipped with a pair of sub-molds that performs press working by an approaching movement of the dies, a sub-mold mounting device for attaching the sub-mold to the main mold, the sub-mold mounting device comprising one of the sub-molds and a guide rod and a guide hole that are provided on the other side and slidably fit into each other and guide the sub-molds so that they can approach and separate while maintaining their opposing relationship; and a guide hole between the pair of sub-molds. a spring that is inserted and urges them to separate them a predetermined distance from each other; and a fitting groove that is formed on an opposing surface of one of the pair of main molds and that fits into one of the pair of sub molds. and a fixing device for removably fixing one of the sub molds to one of the main molds in a state where the guide rod is parallel to the driving direction of the main mold, and the main mold is removed. 1. A sub-mold mounting device for a press, characterized in that said pair of sub-molds can be attached and removed while maintaining their opposing relationship.