JPH0411317B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a press, and particularly to a press that is particularly effective when applied to processing thin plates and small items.

[Prior art and problems to be solved by the invention] Presses that perform cutting, bending, drawing, etc. of workpieces use molds, so they can process a large amount of products precisely into the same dimensions, saving materials. I can do it, etc.
Because it has many features, it is widely used as one of the most suitable processing methods for mass production.

However, since the equipment is generally large, it requires a large space for installation, the installation foundation must also be strong, the life of the mold is short due to the large impact during processing, and a large amount of power is required to drive it. There are various problems such as burrs may be formed on the product and post-processing is troublesome, and when processing small items with gold leaf etc. pasted on the surface, the gold leaf etc. may tear or peel off.

[Purpose of the Invention] The present invention was made to solve the above-mentioned problems, and its purpose is to provide a press that has a small device, has a small impact force, and can process workpieces precisely. This is what I did.

[Means for Solving the Problems] The press according to the present invention has a plurality of driving rollers on the outer periphery of a spindle that is provided above a processing table and is rotationally driven by a motor, with a part protruding from the outer periphery. A drive mechanism is rotatably attached to the spindle, a ram is disposed perpendicular to the drive mechanism with its lower end facing the processing table, and is driven by the drive mechanism to move up and down; It is equipped with a return mechanism that brings the upper end into constant contact with either the spindle of the drive mechanism or the drive roller.

[Operation] When the spindle rotates and the drive roller rides on the ram, the ram descends and strikes the workpiece placed on the die with a punch attached to its tip.
When the ram is removed from the drive roller, it is raised by the return mechanism, and the upper end of the ram comes into contact with the outer peripheral surface of the spindle. By repeating this operation, the workpiece is processed into a desired shape.

[Embodiment of the Invention] FIG. 1 is a front view schematically showing an embodiment of the invention. In the figure, 1 has a bed 2 at the bottom,
It is also a U-shaped frame with a head 3 provided at the top and a processed portion 4 formed therebetween. Reference numeral 5 denotes a processing table provided on the bed 2, on which guide pins 6, 6a are erected. 7 is a cylindrical outer ring hole provided in the head 3; 8 is a substantially T-shaped groove whose upper part opens into the outer ring hole 7 and whose lower part opens into the processed part 4; 9 and 9a are grooves on both sides of the groove 8; A cylindrical chamber is provided, and holes 10 and 10a having a smaller diameter than the chambers 9 and 9a opening into the processing section 4 are formed in the lower part thereof.

Reference numeral 11 denotes a conical spindle disposed within the outer ring hole 7 and rotated in the direction of arrow a by a motor or the like (not shown), and its outer diameter is formed to be slightly smaller than the inner diameter of the outer ring hole 7. A plurality of drive rollers 12 are rotatably mounted on the outer circumference at equal intervals, and a portion of each drive roller 12 protrudes from the outer surface of the spindle 11 and is in line contact with the inner circumference of the outer ring hole 7. ing. These spindle 11 and drive roller 12 constitute a drive mechanism. 13 is slidably disposed within the groove 8 and has a lower portion protruding into the processing section 4.
It is a letter-shaped ram, and in this example, there is a wedge in the middle part.
4 is shown, but this may be omitted. 15 is a mounting plate for the punch 23 fixed to the lower end of the ram 13, and through holes 16, 16a are provided at positions corresponding to the guide pins 6, 6a, into which the upper parts of the guide pins 6, 6a are inserted. .

Guide rods 17 and 17a are installed upright on the upper surface of the mounting plate 15, and are inserted into the chambers 9 and 9a through the holes 10 and 10a.A spring 19 is inserted between the spring seats 18 and 18a provided on the upper part and the head 3. , 19a are interposed to constantly push the ram 8 upward via the mounting plate 15. Note that the chambers 9, 9a, the guide rods 17, 17a, and the springs 19, 19a constitute return mechanisms 20, 20a. 21, 21a are ram 8 and head 3
A spring interposed between the ram 13 and the ram 13 pushes the ram 13 upward, and the top of the ram 13 is in line contact with the outer peripheral surface of the spindle 11 or the drive roller 12.

Next, the operation of the present invention configured as described above will be explained with reference to FIGS. 1 and 2.

First, the die 22 is attached to the processing table 5, the punch 23 is attached to the mounting plate 15, and the die 2 is attached.
2, a workpiece 24 is placed on it. At this time, if the top of the ram 8 is in contact with the outer peripheral surface of the spindle 11 as shown in FIG.
3, there is a gap 〓g. Next, when the spindle 11 is rotated, for example, in the direction of the arrow a, the drive roller 12 slides on the inner peripheral surface of the outer ring hole 7 and moves together with the spindle 11 while rolling in the direction of the arrow b. When the spindle 11 rotates and the drive roller 12 rides on the top of the ram 13 as shown in FIG.
It descends against the pressure and collides with the workpiece 24.

When the spindle 11 rotates and the drive roller 12 comes off the top of the ram 13, the ram 13
9, 19a, 21, 21a and rises;
The top of the ram 13 again comes into contact with the outer peripheral surface of the spindle 11, as shown in FIG.

By repeating this operation at a high speed (normally the punch 23 hits the workpiece 30 to 60 times/sec), the workpiece 24 is moved between the die 22 and the punch 2.
It is processed into the desired shape between 3 and 3.

During machining, the ram 13 is guided by the guide pins 6, 6a and the guide rods 16, 16a and slides vertically into the groove 8, so that the punch 23 can be moved up and down accurately. Furthermore, when the machining is finished, the spindle 11 should be stopped so that the ram 13 is in the position shown in FIG. 1, but if the drive roller 12 rides on the ram 13 as shown in FIG. If the machine stops at this point, the workpiece 24 cannot be taken out. In this case, the spindle 11 may be rotated slightly, but the wedge 14 may be moved back and the ram 1
3 and therefore the punch 23 should be raised.

As mentioned above, in the present invention, the ram 13 is
Since the drive roller 12 is configured to move up and down in accordance with the amount of protrusion from the outer circumferential surface of the spindle 11 to process the workpiece 24, the wedge 14 can be moved forward or backward, or the drive roller 12 can be moved relative to the spindle 11. By changing the amount of protrusion, the stroke of the ram 13 can be adjusted.

In the above description, a case is shown in which the top of the ram 13 is brought into direct sliding contact with the outer peripheral surface of the spindle 11 or the drive roller 12, but a roller may be attached to the top of the ram 13. In addition, the return mechanism 2 of the punch 23
0 and 20a are not limited to the illustrated configuration, and other mechanisms may be used.

[Effects of the Invention] As is clear from the above description, according to the present invention, the following remarkable effects can be obtained.

(1) Since the device is small, it can be installed in a narrow space and does not require a particularly strong foundation.

(2) Only a small amount of power is required for driving.

(3) The life of the mold is extended because the impact force is small.

(4) There is no need for post-processing as there are no burrs.

(5) From the above, the press according to the present invention:
It is particularly effective for bending and embossing thin plates and small items.

[Brief explanation of drawings]

FIG. 1 is a front view schematically showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of its operation. 1: Frame, 2: Bed, 3: Head, 4:
Machining part, 5: Machining table, 7: Outer ring hole, 8:
Groove, 11: Spindle, 12: Drive roller, 1
3: Ram, 14: Wedge, 15: Mounting plate, 20, 20
a: Return mechanism, 22: Dice, 23: Punch, 2
4: Workpiece.

Claims (1)

[Scope of Claims] 1. A drive in which a plurality of drive rollers are rotatably mounted on the outer periphery of a spindle which is provided above a processing table and is rotationally driven by a motor, with a portion protruding from the outer periphery of the spindle. a mechanism; a ram disposed orthogonal to the drive mechanism with its lower end facing the processing table and moved up and down by being driven by the drive mechanism; and energizing the ram so that its upper end is connected to the spindle of the drive mechanism. Or a press equipped with a return mechanism that is brought into constant contact with one of the drive rollers. 2. A bed with a processing table on which a die is attached at the lower part, and a head equipped with a cylindrical outer ring hole and a groove whose upper part opens into the outer ring hole and whose lower part opens into the lower end. A frame with a machined part formed between it and the bed, and a plurality of drive rollers rotatably mounted on the outer periphery with a part protruding from the outer periphery, and a spindle rotationally driven by a motor is inserted into the outer ring hole of the head. a drive mechanism in which the drive roller is in sliding contact with the inner circumferential surface of the drive roller and is rotatably disposed; The ram includes a ram to which a mounting plate is fixed, and a return mechanism that urges the ram upward via the mounting plate and brings its upper end into constant contact with either the outer peripheral surface of the spindle or the drive roller. press.