JPS6227890B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold changing device for a press working machine, and particularly to a mold changing device suitable for a press working machine that uses many types of molds. In press processing, with the diversification of product processing operations, there has been a marked trend toward processing a wide variety of products in small quantities. For this reason, shortening the setup time, which has been overlooked in the past, has become a problem. In conventional mold replacement, first, a mold matching jig is fixed to the upper and lower mold mounting parts of the press machine, that is, to one of the upper and lower mold bases.
Then, one mold base is moved, and the distance from the other mold base is maintained at a predetermined interval, that is, the fixture dimension, using the mold matching jig, and at the same time, the mold base is removed with a dowel pin, etc. Fix by. Thereafter, a mold is loaded into a fixture, that is, a mold fixture provided on the upper and lower mold bases. The fixture projects vertically in parallel to the upper or lower surface of the mold base, and has a guide protrusion on its inner surface. Between these parallel fixtures,
A mold having a guide groove formed on the side surface facing the guide protrusion is inserted and loaded. Note that the guide protrusion of the fixture and the guide groove of the mold are formed so that there is no gap between the contact surface between the mold base and the mold. Load the mold as described above, remove the dowel pins that secure the mold base, and begin work. As described above, loading molds into a press processing machine is very complicated, so when performing various types of press processing, such as beading, bending, and punching, steps such as mold replacement and storage are required. The drawback was that it took a lot of time to assemble. The purpose of the present invention is to automatically exchange dies to shorten the time required for changing dies, thereby improving the efficiency of a press machine that uses many types of dies, and to press a long material. It is an object of the present invention to provide a mold changing device that can be easily carried into and out of a machine without any trouble. The present invention provides an elevating post installed vertically near a press machine, a saddle engaged with the elevating post and installed to be movable up and down, and a mold base of the press machine supported by the saddle. A slide arm is arranged to move forward and backward, a grip section is provided at the end of the slide arm on the press processing machine side and grips a pair of molds with a fixture dimension apart, and The present invention is characterized in that it is comprised of a mold holding means which is disposed vertically shifted from the working position of the press working machine and is detachably held at a distance of a fixture dimension. DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mold changing device according to the present invention will be described below with reference to FIGS. 1 and 2. FIGS. 1 and 2 are a plan view and a front view showing an embodiment of a press machine and a die changing device according to the present invention. In FIGS. 1 and 2, A is a gate-type press machine, B is a mold conveyance device provided corresponding to the press machine A, and C is a mold conveyance device that surrounds the mold conveyance device B. This is a mold holding device installed in FIG. 3 is an enlarged front view of the mold conveying device and mold holding device in the arm portion of FIG. 1, and FIG. 4 is an enlarged plan view showing the grip portion of FIG. 3 in a state where the mold is gripped. Fig. 5 is an enlarged sectional view of the A-A section in Fig. 4, Fig. 6 is an enlarged sectional view of the U-U section in Fig. 1, and Fig. 7 is an enlarged sectional view of the
The figure is an enlarged sectional view of the A-E section in FIG. 1. In the figure, 3 is a lifting post installed on the foundation;
4 is a saddle mounted on the lifting post 3 via a linear way 9 so as to be able to move vertically;
Reference numeral 2 designates a slide arm that is horizontally movable attached via a rail 11 to a position on the upper surface of the saddle 4 that does not interfere with the lifting post 3, and 1 a grip portion provided at the tip of the slide arm 2. Next, 14 is an upper mold, and 15 is a lower mold.
The saddle 4 is raised and lowered by a hydraulic cylinder 10 arranged in parallel along the lifting post 3, and the slide arm 2 is moved up and down by a hydraulic motor 8 provided on the saddle 4 and a rack 7 provided on the slide arm 2. horizontal movement by. Next, grip part 1
I will explain in detail. A case 1-2 is attached to the tip of the slide arm 2 by bolts or the like, and four bosses 1-5 are fixed to both sides of the case 1-2, each horizontally arranged. The rod 1-7 is connected to the boss 1-5 through the sleeve 1-8.
is installed so that it can move forward and backward. Said rod 1-
A rib 1-1 whose tip extends toward the opposite side of the slide arm 2 is attached to the tip of the slide arm 7. Therefore, the rib 1-1 is supported so as to be movable in the horizontal direction with respect to the case 1-2. Furthermore, a pair of upper and lower parallelogram-shaped links 1-3 are provided in the case 1-2 to connect the ribs 1-1 provided on both sides of the case 1-2, and the links 1-3 are attached to the links 1-3. The spacing between the ribs 1-1 is changed by the expansion and contraction of the hydraulic cylinder 13. Pins 1-4 corresponding to holes provided in the side surfaces of the upper mold 14 and the lower mold 15 are attached to opposing positions of the ends of the ribs 1-1, and the link 1 is moved by the expansion and contraction of the hydraulic cylinder 13. The structure is such that the rib 1-1 is moved horizontally through the pins 1-3, and the upper mold 14 and the lower mold 15 are gripped through the pins 1-4. A mold storage rack 5 holds the upper mold 14 and the lower mold 15 at a predetermined distance. In addition,
The distance between the upper mold 14 and the lower mold 15 is such that the upper surface of the upper mold 14 and the lower surface of the lower mold 15 match the distance between the upper and lower mold bases when replacing the molds of the press processing machine A. The fixture dimension W is maintained as shown in FIG. Reference numeral 6 denotes a turntable on which a plurality of mold storage racks 5 are installed, and upper and lower molds with designated addresses to be used for each pressing operation are set at positions corresponding to the pins 1 to 4 of the grip portion 1 described above. It has an automatic indexing function that allows you to select the necessary mold according to the order of the work process. The turntable 6 is installed so that the mold storage rack 5 is at a lower position than the mold base of the press processing machine A. In such a configuration, when loading molds into the press machine A, first, the mold bases of the press machine A are automatically positioned at predetermined intervals.
Next, the turntable 6 of the mold holding device C is rotated by an automatic indexing mechanism so that the mold to be loaded from now on corresponds to the pins 1 to 4 of the grip section 1 of the mold conveying device B. After that, the rib 1 of the grip part 1-
1 is opened, the hydraulic cylinder 10 is driven to lower the saddle 4 to a position where the rib 1-1 corresponds to the pin holes of the upper and lower molds 14 and 15. next,
Drive the hydraulic cylinder 13 to move the ribs 1 on both the left and right sides.
1, and the upper and lower molds 14 and 15 are gripped by the ribs 1-1. At this time, pin 1 of rib 1-1
-4 fits into the holes of the upper and lower molds 14 and 15. Then, the upper and lower molds 14, 15 are formed by the ribs 1-1.
while holding the saddle 4 to the hydraulic cylinder 10.
is driven to raise the pins 1-4 of the grip part 1 to a position corresponding to the fixture dimension between the upper and lower mold bases of the press processing machine A. Next, the hydraulic motor 8 is driven to move the slide arm 2 to the grip portion.
The upper and lower molds 14 and 15 of No. 1 are moved to positions corresponding to the positioning holes of the mold base of press processing machine A. At this time, the guide grooves provided on the side surfaces of the upper and lower molds 14 and 15 are fitted into the guide protrusions formed on the fixture of the mold base. Then, the ribs of the grip portion 1 are opened by driving the hydraulic cylinder 13, and the slide arm 2 is moved back, thereby completing the loading of the upper and lower molds. In addition, when removing the upper and lower molds 14 and 15 from the press processing machine A,
The above operation is reversed. According to such a configuration, the upper and lower molds 14, 15
is held in the mold holding device C and has already been installed on the mold base, that is, set to the predetermined fixture dimensions, and is transported as it is to the mold base, making it difficult to place it in a complicated position. No alignment is required and the work is very easy. Furthermore, since a plurality of molds are held by the mold holding device C, storage and selection of molds is very easy. Furthermore, when the slide arm 2 is lowered, at the material processing position of the press processing machine A, that is, at the horizontal position corresponding to the mold base, there is no member obstructing the movement of the slide arm 2 in the forward and backward direction. When carrying in, carrying out, and processing a long material, the material does not come into contact with other members constituting a vessel, and the processing of the long object can be easily carried out. Furthermore, in the illustrated configuration, the upper end of the lifting post 3 protrudes above the material processing position of the press processing machine A, but if the upper end is formed lower than the material processing position, the elongated and wide material It is also easy to process. As explained above, according to the present invention, the work of assembling the mold base and the mold and the loading of the mold can be performed accurately, safely, and in a short time, thereby improving efficiency when processing a large variety of products in small quantities using a press machine. can be achieved. Furthermore, since the slide arm moves up and down to perform mold exchange work, when the slide arm is lowered, the press machine can easily process long materials.

[Brief explanation of the drawing]

1 and 2 are a plan view and a front view showing an embodiment of a press working machine and a die changing device according to the present invention, FIG. 3 is an enlarged front view of the area shown in FIG. 1, and FIG. The figure is an enlarged plan view of the grip part in Fig. 3, Fig. 5 is an enlarged sectional view of the A part in Fig. 4, and Fig. 6 is an enlarged sectional view of the grip part in Fig. 4.
The figure is an enlarged cross-sectional view of the woo part in figure 1, and figure 7 is an enlarged cross-sectional view of the
FIG. A...Press processing machine, B...Mold conveyance device, C...Mold holding device, 1 ...Grip part, 2...Slide arm, 3...Elevating post, 4...Saddle, 5...Mold storage rack, 6...Turn Table, 7... Easy, 1
4... Upper mold, 15... Lower mold.

Claims (1)

[Claims] 1. In a mold changing device that is provided corresponding to a press machine and that exchanges the mold of the press machine,
An elevating post installed vertically near the press machine, a saddle that is engaged with the elevating post so that it can move up and down, and a saddle that is supported by the saddle and moves forward and backward relative to the mold base of the press machine. a freely disposed slide arm, a grip part provided at the end of the slide arm on the side of the press machine, which grips a pair of molds with a fixture dimension apart; A mold changing device comprising a mold holding means that is arranged vertically shifted from the processing position of the mold and removably holds a pair of molds separated by a fixture dimension.