JPS5932240B2 - Mechanical press equipment for processing long objects - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mechanical press apparatus for processing long objects.

Conventionally, it has been said that it is better to use a hydraulic press equipped with a large number of pressurizing rams for molding long objects, but hydraulic presses are generally inferior in productivity compared to mechanical presses.

Furthermore, conventional mechanical presses require a highly rigid press to minimize deformation of the slide.

The present invention was made in view of the above circumstances, and its purpose is that the slide deforms in the same manner as the bed deforms during press working, and the load on the mold is similar to that of a hydraulic press. It is an object of the present invention to provide an economical mechanical press device for processing long objects, which can be expected to have the same effect as forming with a hydraulic press, has the high productivity of a mechanical press, and is economical.

Hereinafter, the present invention will be explained with reference to the drawings.

In the drawing, 2 is a slide, and 1 is a crown.

The slide 2 is provided with a plurality of point mechanisms P and a plurality of cushion mechanisms Q.

The point mechanism P includes a point body 4 fixed to the slide 2, a ram 19 is fitted and inserted into the point body 4, and a hydraulic chamber 20 is provided below the ram 19.

The ram 19 is slidably engaged with a collar 18 fixed to the point body 4.

Further, a distance 17 is fitted into the point body 4, and the discless 17 is slidably engaged with a collar 18.

A nut member 13 is rotatably provided within the point body 4, and a worm wheel 15 is fixedly provided on the outer peripheral side of the nut member 13.

A case 14 is fitted into the point body 4, and the case 14 is fixed to the holder 12.

A worm 16 meshes with the worm wheel 15, and the worm 16 is connected to a drive mechanism.

A connecting screw 11 is threaded onto the nut member 13, and the connecting screw 11 is attached to the wrist pin 1.
0 and is connected to the slide drive section R via a connecting rod 3.

The cushion mechanism Q includes a cylinder 23, and a hydraulic device 31 is provided at the bottom of the cylinder 23.

A piston 24 is fitted into the cylinder 23, and a rod 26 of the piston 24 is connected to a spool 32 of a hydraulic device 31 at a lower portion.

The air chamber 41 of the cylinder 23 communicates with the pneumatic tank 6 via a conduit 28.

A limit switch 40 is provided on the cylinder 23 via a bracket 25, and the limit switch 40 is operated by a dog 26a of the rod 26.

The lower chamber 29 of the cylinder 23 communicates with the atmosphere via a port 30.

In the drawing, 34 is a pump, and the discharge side of the pump 34 is connected to the port 21 of the hydraulic chamber 20 via a pipe 22, and the discharge side of the pump 34 is connected to a port 33 of the hydraulic device 31 via a pipe 37. A check valve 35 is provided on the discharge side of the pump 34.

The port 38 of the hydraulic device 31 also communicates with the tank via a conduit 39.

In the drawing, 42 is a regulating valve.

Thus, the operation of the slide drive section R is transmitted to the slide 2 via the connecting rod 3, wrist pin 10, connecting screw 11, nut member 13, distance 17, ram 19, and hydraulic chamber 20.

The hydraulic chamber 20 is filled with a preset hydraulic pressure to push up the ram 19, but due to the load caused by the press work, the hydraulic pressure in the hydraulic chamber 20 is introduced into the hydraulic device 31, which pushes the piston 24 through the spool 32. Pushing upward, the piston 24 compresses the air in the air chamber 41 to provide a cushioning effect.

In this way, a certain portion of each point mechanism P, that is, a point, has a cushioning effect due to the load at the respective disposed portion.

If the cushioning action is performed at the point beyond the pre-designed value, the limit switch 40
is activated to prevent overload.

FIG. 3 shows the state of strain occurring at various parts when a long object is formed using a mechanical press equipped with a cushion device at the above-mentioned point parts, and the features of the present invention.

For example, the slide drive parts from crown 1 are A, B, C,
The four points D are arranged in a line and the slide 2 is operated through the point mechanism P.

Next, distortion of each part during press load will be explained.

δCO is the deflection at the center of the crown, the amount of cushioning at each point of the slide part is δ'St at parts A and D, δ's2 at parts B and C, and the amount of cushioning of the piston in the hydraulic device 31 at this time is A and D. δ negative 1, B.

In part C, δ is set to negative 2.

Figures 4a and 4b show the progression of deflection of slide 2, mold 7, and bed 9 due to press load. Slide 2
is pressurized by points A, B, C, and D, and bed 9 is supported by points G and H.

In a, the slide 2 and bed 9 are deflected as shown in the figure due to the rounded surface between E and F of the mold, but both ends of the mold 7 are E and F.
At the same time as points A, B, C, and D hit, slide 2 and bed 9 become concave deflections due to the action of ram 19, but at the next stage slide 2 and The mold 7 has a deflection shaped like that of the bed 9, and the load on the mold 7 is at points A and B.

The load is applied almost uniformly by C and D.

In this case, the amount of cushion mentioned above is 6 boxes〉δ′s2. δknowledge〉There are 2 Tes for 6 people, and the deflection at each point A, B, C, and D of slide 2 resulting from this is δSitδs2. Also, the amount of deflection for bet 9 and slide 2 is δS
l>δBO, and the cushionable amount of each point A, B, C, and D is δ.

+δ81+δBO means dog.

Adjustment of the point mechanism P is performed by driving the worm 16, rotating the nut 13 via the worm wheel 15, and moving the connecting screw 11 up and down.

As described above, the present invention provides each point A and B of slide 2.
, C, D through the ram 19 due to the press load in the hydraulic chamber 2.
0 is provided with a point mechanism P that generates hydraulic pressure, and the slide 2 is operated by the hydraulic pressure of the hydraulic chamber 20 to generate a cylinder 23.
This mechanical press device for processing long objects is characterized by being provided with a cushion mechanism Q for compressing the air inside with a piston 24.

A hydraulic press that is generally used for processing long objects is equipped with a number of hydraulic cylinders that move slides up and down, and the cushioning effect of these hydraulic cylinders causes the load applied to the mold to become as shown in Figure 4.

Furthermore, with the configuration of a normal mechanical press, it is not possible to obtain the deflection of the slide and head necessary for processing long objects.

However, in the device of the present invention, the configuration is as described above, and the hydraulic pressure in the hydraulic chamber 20 of the point mechanism P is used, and this hydraulic pressure is introduced into the cushion mechanism Q, and the right points A, B, C, D
Since the ram 19 of the point mechanism P acts as a cushion, the slide 2 also deforms in the same way as the bed 9 is distorted during press working, and the load on the mold γ becomes similar to that of a hydraulic press. , hydraulic presses can be expected to have the same effects as forming processes, and have the high productivity of mechanical presses.

In addition, conventional mechanical presses require a highly rigid press to minimize deformation of the slide, but the present invention does not require this and is therefore more economical.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view thereof;
Fig. 2 is a vertical cross-sectional view of the main part, Fig. 3 is an explanatory diagram of the state of strain occurrence at each point during long object forming work, Fig. 4 a,
b is an explanatory diagram of the operation. 2 is a slide, 19 is a ram, 20 is a hydraulic chamber, P is a point mechanism, and Q is a cushion mechanism.

Claims (1)

[Claims] 1 A point mechanism P is provided at each point A, B, C, and D of the slide 2 to generate hydraulic pressure in the hydraulic chamber 20 via the ram 19 due to press load, and the hydraulic chamber 20 is provided in the slide 2.
A mechanical press device for processing long objects, characterized in that it is provided with a cushion mechanism Q that is operated by hydraulic pressure to compress air in a cylinder 23 with a piston 24.