JPS6016294B2 - Mold reversing device for press machines - Google Patents

Description

Detailed Description of the Invention The present invention relates to a mold reversing device for a press machine, and in particular, a reversing slide for fixing an upper mold is removably provided on the lower surface of the slide of a press machine, and the reversing slide is separated from the slide and lowered. The system is characterized by the use of a rack and pinion and rotation transmission gear mechanism to automatically invert and fix the bolster with the lower mold attached on the moved bed without using a drive device such as a motor. This relates to a mold reversing device for a press machine.

Hereinafter, the present invention will be explained based on examples.

Figures 1 to 4 show an embodiment of the crown part and slide sliding part of the press machine of the present invention, and the press frame is rigidly formed by a crown 1, an upright 2, and a bed 3 in the lower part. Slide 4 along the upright 2 and crown 1
and the bed 3 by means of a lifting pressurizing device (not shown) such as a hydraulic cylinder so as to be movable up and down. On the lower surface of the slide 4, as shown in FIGS. 1 and 2, an inversion slide 5 for fixing the upper mold is removably attached to a bracket 6 for attaching and detaching the inversion slide with a detachable pin 6a. .
Further, a bolster 7 for fixing the lower mold is horizontally disposed on the bed 3 and can be taken in and out by a transfer device (not shown) such as a motor or a cylinder. At the center of both sides of the reversing slide 5, there are reversing shafts 9, 9a with brackets 8, 8a fixed to the reversing slide 5 as shown in FIGS. 1 and 3.
are inserted and connected, and the guide brackets 8 and 8a arranged on the side surface of the upright 2 are brought into sliding contact with each other, so that the reversing slide 5 can be moved up and down independently of the slide 4. A reversing pinion 10 is attached to one of the reversing shafts 9 of the reversing slide 5, and the reversing slide 5 has a retracting sill 12 with a predetermined stroke fixed to the crown 1 as shown in FIGS. 1 to 3. It is pulled back upward by a ram 15 via rods 13 and 14 attached to the brackets 8 and 8a. A pedestal 16 is provided on the side surface of the crown 1 as shown in FIG. 2, and a gear box 17 is attached thereto.
As shown in FIG. 4, the gear 18 protrudes outward. A long rotation transmission shaft 19 that passes through this gear 18 and is attached to the shaft is fitted with a slightly longer key 20 on the side as shown in FIG. 1 so that it can slide in the axial direction like a spline ball, and is is inserted into a first gear box 21 attached to one bracket 8 of the reversing slide 5 and connected to enable rotation transmission. The first gearbox 21 has a pinion 22 protruding from the side, which engages with the reversing pinion 11 to drive the reversing slide 5 in reverse. On the other hand, on the crown 1, as shown in FIG. 2, a toothed pinion is formed with a tooth profile 23a at approximately one-fourth of the circumference on the lower side, and has planar marshy surfaces 23b and 23c on both sides thereof. 23 is pivotally mounted so as to engage with a rack-like toothed profile 13a provided at the intermediate portion of one of the rods 13 for reversing and pulling back the slide. The feed shape 13a is the tooth shape 2 of the toothless pinion 23.
3a to rotate the reversing slide 5 by 180 degrees, and the sliding surfaces 23b and 23c of the partially toothed pinion 23 are connected to the upper and lower surfaces 13a and 13c of the rod 13, respectively, before and after the tooth profile 13a. The reversing slide 5 can be maintained horizontally by sliding contact. As shown in FIG. 4, the toothless pinion 23 has a rotating shaft 24 projecting therefrom, one end of which is pivotally connected to a bearing 25, and the other end of which is connected to a clutch 24.
6 is connected to the second gear box 27, and is engaged with the gear 18 on the side of the gear box 17 installed on the pedestal 16 as shown in FIG. The rotation of the partially toothed pinion 23 is transmitted to the reversing slide 5 in a freely reversible manner via the rack and pinion mechanism and the rotation transmission gear mechanism as described above. 29 is
It is a slide guide.

However, in the press machine configured as above,
The slide 4 is clamped at the upper limit by a normal clamping device (not shown), the polster 7 is moved outside the press body, and the reversing slide 5 is separated from the slide 4 and lowered by its own weight, as shown in the left view of Fig. 5. Like 1.

The lower surface 13a of the pinion 13 descends while sliding against the sliding surface 23b on one side of the toothless pinion 23. Since this intermittent toothed pinion 23 cannot rotate, the reversing slide 5 maintains a horizontal state as shown in the figure. Tooth profile 13 at the middle of the rod 13
When a reaches the partially toothed pinion 23, the tooth profiles 13a and 23a of both teeth engage with each other as shown in the central figure, and the partially toothed pinion 23 rotates due to the continued downward movement. Then, the clutch 26, second gear pox 27, pinion 28,
The reversing pinion 11 is rotated through the gear 18, the rotation transmission shaft 19 shown in FIG. 1, the first gear box 21, and the pinion 22 shown in FIG. 2, and the reversing slide 5 is reversed as shown in the center view of FIG. At the position where the reversing slide 5 has rotated 180 degrees, the tooth profile engagement of the toothless pinion 23 ends, and as shown in the right view of FIG. 23c, and the reversing slide 5 is lowered by its own weight to the upper surface of the bed 3. During this time, the toothless pinion 23 cannot rotate, so the reversing slide 5 maintains its horizontal state. As a result of the above, the operator
The lower mold on the upper surface and the upper mold on the reversing slide 5 can be efficiently and safely inspected, processed, and repaired with a comfortable downward posture on the same plane. When the work is completed, the reversing cylinder 12 is operated to raise the reversing slide 6, and the reversing slide is reversed by the reverse stroke to come into close contact with the lower surface of the slide 4. Next, the detachable pin 6a is inserted into the detachable bracket 6 and fixed. In trial work, etc., the reversing slide 5 is fixed in close contact with the lower surface of the slide 4, and the slide 4 is lowered using the guide 29 as a guide by a lifting/lowering pressurizing device (not shown) to perform the press work. ,
Great rigidity can be obtained.

At this time, the partially toothed pinion 23 performs the same operation as during the reversing slide reversing operation by the rod 13, but the clutch 26
Since the rotation transmission can be interrupted by , the reversing slide 5 can be left uninverted. Yo.・
child. - By changing the gear ratio and rotation ratio of the gear box, it is possible to make the rod not only parallel but also at a certain angle, and the rod can be installed not only integrally with the pullback device but also at a certain angle. , it is also possible to provide it separately from the pull-back device.

As described above, in the present invention, the reversing slide separated from the slide is lowered horizontally by the sliding contact between the rod provided vertically on the reversing slide and the sliding part of the toothless pinion disposed in the crown part. In addition, the reversing slide can be reversed through a rotation transmission gear mechanism having a long rotation transmission shaft by engaging the tooth profile of the toothless pinion with the rack-shaped tooth profile of the rod midway. The upper mold can be installed facing upward on the bed with the bolster moved, and the reversing slide can be automatically reversed without stopping during the descent and without using a drive means such as a motor. It is.

The upper and lower molds can be placed side by side on almost the same plane, making work such as mold correction easier.Furthermore, in trial work, the reversing slide can be fixed closely to the bottom of the slide, so the slide It has increased rigidity and can be molded with precision.

[Brief explanation of the drawing]

FIG. 1 is a partially omitted sectional view of the main parts of an embodiment of the present invention;
Fig. 2 is a side view of the same as above, Fig. 3 is a plan sectional view taken along section A-A of Fig. 1, Fig. 4 is a plane sectional view taken along section B-B of Fig. 1, and Fig. 5 is an inversion of the same as above. It is an explanatory diagram of reversing operation of a slide. 1...Crown, 3...Bed, 4...Slide, 5...Reversing slide, 7...Bolster, 11...Reversing pinion, 13...Rod, 13a...Tooth profile, 18...
・Gear, 19...Rotation transmission shaft, 22...Pinion,
23... Missing tooth pinion, 23a... Tooth profile, 23b,
23c...Sliding surface, 28...Pinion. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. A reversing slide for attaching the upper die is removably fixed to the lower surface of a slide that can be driven up and down in a press machine, and a toothed rod in the form of a rack for reversing the reversing slide is installed vertically at the side part in the upper part. The above-mentioned reversing slide attached to the mold is disposed so as to be movable up and down independently of the slide, and a bolster for attaching the lower mold is disposed so as to be movable in and out of the bed. The crown of a press machine is a toothless pinion whose circumferential part has a tooth profile that engages with the rack-shaped tooth profile of the rod, and whose both side faces are planar sliding surfaces that can be slid along the rod. A pinion for reversing the reversing slide is attached to the side surface of the reversing slide so that the reversing slide can be rotated freely, and a long rotation transmission shaft is provided at the upper part of the reversing slide and the toothless pinion and the upper part thereof can freely transmit rotation. A rotation transmission gear mechanism is disposed at the lower part to engage with the reversing pinion so as to freely transmit and drive the rotation, and the reversing slide separated from the slide is connected to the vertical rod at the upper crown part by sliding one side of the toothless pinion. Bringing the moving surface into sliding contact and engaging the tooth profile of the toothless pinion in the intermediate portion of the lowering rod with a rack pinion, and rotating the reversing pinion via the rotation transmission gear mechanism to make the reversing slide freely reversible; A mold inversion device for a press machine, characterized in that an inverted slide is formed so that it can be freely lowered and installed on a bed to which a bolster has been moved.