JPS6364280B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an improvement in the ram device of a crank press machine, and particularly a completely new crank press machine in which the ram device is dramatically improved.

As is well known, the ram device in conventional crank press machines has a large number of moving parts.
Therefore, there are many gaps in the moving parts, and therefore there is a lot of play in the vertical direction, and the product accuracy is extremely poor.As there are many parts that move in a complicated manner, the inertia caused by the movement is large and it is not suitable for high speeds, which is a serious defect. In addition, the accuracy of the ram's motion depends only on the guide, so it is susceptible to eccentric loads, and is prone to vibration and loud noise. Furthermore, since the ram is accompanied by the movement of the connecting rod, the component force is increased, which impairs the accuracy of linear movement.
Moreover, there are many heat-generating parts, so the accuracy deteriorates quickly and is large due to the heat, and there are various disadvantages such as the high cost, poor operability during operation, and poor quality of the processed product. The current state of the industry is that various mechanical disadvantages such as poor accuracy and unsuitability for high-speed operation remain unresolved.

Therefore, in the present invention, as a result of various research and development, we have been able to clarify what is causing the various disadvantages mentioned above to be unresolved, and we have solved all of them by presenting a completely new ram device that is not based on preconceptions. This is a very useful invention that provided an epoch-making crank press machine.

That is, the present invention relates to a ram device for a crank press machine, characterized in that a crank pin metal configured to be slidable is disposed obliquely on the ram.

The present invention also relates to a ram device for a crank press machine, characterized in that a crank pin metal configured to be slidable is disposed obliquely on the ram, and the sliding portion is set to be rotatable.

Next, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, by presenting the ram device of the embodiment shown in FIGS. 1 to 4, the various unresolved deficiencies mentioned above can be solved at once, and moreover, it has very useful features as described below. We were able to provide an epoch-making crank press machine that could exhibit the following characteristics.

First, as shown in the examples shown in FIGS. 1 and 2, the crank pin metal 1 is constructed as a slide block or slide metal that can be slid, and an inclined slide formed or disposed on the ram 2 is attached to the slide block or slide metal. It is a ram device that is fitted into the contact portion 3, that is, arranged at an angle at a predetermined angle with respect to the rotation direction, and in the figure, 4 is a crankshaft, 5 is an upper mold, 6 is a lower mold, 7 is a bolster, 8 is the bed, 9 is the frame, 10 is the ram guide, 11 is the lateral counterbalance, 12 is the shock absorber,
Die height adjustment should be done at the upper mold section or at the bed bolster, and in the case of high-speed presses, it is preferable to adjust it at the non-moving bolster bed or at the lower mold section.

In addition, in the illustrated examples of A and B in FIG. 3, two crankshafts 4, 4' (see figure A), or three (see figure B) are attached to a crank pin metal 1' constructed as a slide block or a slide metal. , 4'', which are fitted into the inclined sliding contact portion 3 formed or disposed on the ram 2, and rotated using one of the crankshafts, for example 4 or 4', as a driving source. By presenting a ram device that converts the entire sliding motion into accurate linear motion of the ram 2, it can demonstrate a dramatic effect against eccentric loads, and by rotating one shaft, the link mechanism of other shafts can be used. Since it rotates, transmission members such as gears, chains, or belts are completely unnecessary, and it can exhibit remarkable features such as extremely smooth operation.

It should be noted that the crank pin metal that constitutes the slide block or slide metal shown in FIGS. 2 and 3, respectively, has a structure like the illustrated example that can even out the wall thickness and prevent partial deformation due to heat, so as to improve the heat dissipation effect. Of course, it should be good.

In addition, the illustrated examples A and B in FIG. 4 show a mode in which a slidable crank pin metal 1 is rotatably set on a ram 2, that is, a rotary type in which the set angle is approximately <60° with respect to the rotation direction. , which has the effect of making the stroke length variable.

The operation of this invention will be explained with reference to FIG. 5 as follows.

The rotation of the crankshaft 4 causes the crank pin 14 to move the crank pin metal 1 left and right along the sliding contact portion 3 by twice the amount of eccentricity of the crank pin 14. At the same time, the ram 2 is moved up and down with respect to the frame 9.

At this time, the crank pin 14 is always forcibly brought into contact with the crank pin metal 1, which is pressed in the direction of the arrow by the lateral counterbalance 11, at a joint curved surface L at a predetermined location. Therefore, the clearance gap n for rotation existing between both members is maintained on the opposite side (left side).

Further, since the crank pin metal 1 is installed in the ram 2 in a state inclined by a predetermined angle θ with respect to the horizontal plane, the ram 2 is moved by the component force K ₁ of the pressing force K applied to this inclined plane. During movement of the crankshaft 4, the crankshaft 4 is moved up and down while contacting the frame 9 at the sliding surface M, which is always pressed in the direction of the arrow (right).

In this way, the gaps n and m between the crank pin metal 1 and the frame 9 required for the rotation of the crankshaft 4 and the movement of the ram 2 can be maintained without causing any change in the trajectory of the movement of the ram 2 during the operation of the ram 2. As a result, it is possible to manufacture products with high precision.

The functions and effects when a plurality of crankshafts are formed in the crank pin metal will be explained below with reference to FIGS. 6 and 7.

As shown in Figure 6, when one crankshaft 4 is provided for the crank pin metal 1 set at an inclined position, the rotational moment caused by the eccentric load during machining is applied to the crankshaft 4. In addition, maintenance measures for said moments on the crankshaft 4 may be required.

As shown in Fig. 7, when two crankshafts 4, 4' are provided for a crank pin metal 1' having the same function as the above-mentioned crank pin metal 1, Since the rotational moments are borne by the respective crankshafts 4', 4, no maintenance measures are required for said moments.

By having the ram device in the crank press machine of the present invention configured as described above, not only can all the various disadvantages caused by the conventional mechanism mentioned above be solved, but in particular, in the present invention, the vertical center of the ram can be fixed. Since it has a certain angle with respect to the line, the ram's vertical movement is smooth and rational, and in any case, the ram passes through its bottom dead center, and there is no risk of it becoming stuck. In addition, the component force during this operation always tends to push the ram against the sliding surface in one direction, so the gap between the two is minimized, minimizing unstable movement of the ram due to eccentric loads during press working. This feature significantly improves the accuracy of crank press machines.

Moreover, the stroke length can also be varied based on the above-mentioned features, which is a very useful invention.

[Brief explanation of drawings]

The accompanying drawings, FIGS. 1 to 4, show embodiments of the present invention, with FIG. 1 being a front view of the first embodiment, and FIG.
The figure is a detailed enlarged view of a part thereof, FIGS. 3A and B are partially detailed enlarged views showing the second embodiment, and FIGS. 4A and B are partially detailed enlarged views showing the third embodiment in an operating state. ,
5, 6, and 7 are explanatory diagrams of the operation of the present invention, in which 1 is a crank pin metal configured as a slide block or slide metal, 2 is a ram, 3 is a sliding contact portion, and 4 10 indicates the crankshaft, and 10 indicates the ram guide.

Claims (1)

[Scope of Claims] 1. Both end faces are held between two frames, and as the crankshaft rotates, it moves up and down between the frames by a predetermined amount via a crank pin provided on the shaft. In addition to forming a ram, a crank pin metal having a predetermined inclination angle is slidably provided in the ram, and the crank pin is rotatably supported with respect to the crank pin metal, and a horizontal counter is formed. A ram device for a crank press machine, characterized in that the crank pin metal is maintained at a predetermined joint curved surface with respect to the crank pin through balance. 2. A ram device for a crank press machine, characterized in that a plurality of independent crank pins are rotatably supported on the crank pin metal according to claim 1.