JPS583619Y2 - Shearing machine blade edge clearance automatic adjustment device - Google Patents

Description

[Detailed description of the invention] ゛・This invention relates to an automatic blade edge clearance adjustment device for shearing machines, which eliminates the need for manual adjustment using adjustment screws, etc. when changing the blade edge clearance on site, and obtains the required clearance at once using hydraulic drive. It is.

It is well known that whether or not the cutting edge clearance of a shearing machine is appropriate has a great effect on the quality of the sheared surface.

Conventionally, the adjustment work of moving a long shearing blade to obtain proper clearance and perfect parallelism with the mating blade required skill and time to fine-tune multiple adjustment screws.

The inventor of the present invention has found from experience that it is not necessary to change the cutting edge clearance each time the plate thickness changes, and that there is no adverse effect on quality even if a certain range of plate thicknesses is sheared with the same clearance.

Then, the plate thickness range targeted by the shearing machine was divided into multiple sections, and appropriate tolerances were set for each section, one for thin plates and one for thick plates.

Then, by driving a table with a lower blade on the bed so that when it hits a certain stopper it changes to a thin plate, and when it hits another stopper it changes to a thick plate, it was possible to automate clearance changes.

Figures 1 and 2 show the plane and front view of a table (portion) of a scare shear to which this invention is applied, and Figure 3 shows its cross section.

A lower shearing blade 2 is attached to one edge of the table 1.

The table 1 is placed on a bed 3, and a piston rod 4a is erected above a clamping device (hydraulic cylinder) 4 on the bottom surface of the bed 3, and a piston rod 4a is placed between the cylinder end and a holding fitting 5 that is engaged with the upper end of the rod 4a. The table 1 is clamped and fixed.

In this case, the holding fitting 5 consists of a washer and a double nut holding it down.

The edge of the table 1 on the side where the blade 2 is not attached is a hanging edge 1a, and a protruding rod 7 is inserted horizontally into the upper end side of the bed 3 passing through a hole 6 in this hanging edge 1a.

In this case, a double spring 8 is interposed in the gap l between the inner surface of the hanging edge 1a and the upper end side surface of the bed 3, and serves as a driving means for relatively moving the table 1 in a direction to widen the gap.

On the other hand, there is also a stopper 9 that prevents the table 1 from retreating so that the same gap l does not become too narrow.

In this case, the hanging edge 1a as shown in FIG.
A hard plate 10 is buried in the abutting position on the bed 3 side by the adjustable screw 9a screwed in and the fixing nut 9b.

Also, a fine adjustment nut 11 is attached to the threaded end of the protruding rod 7 mentioned above.
a and its holding cap-shaped oak N1b are tightened and fixed,
A protruding rod head 11 is formed.

This head 11 serves as a stopper for stopping the table 1 from moving forward.

Further, a hydraulic drive member 12 is fitted onto the protruding rod 7 and is interposed in the gap between the protruding rod head 11 and the outer surface of the hanging edge 1a, and acts to widen the gap.

In other words, table 1 is moved back. In this case, the hydraulic drive member 12 consists of a cap-shaped inner cylinder 12a and a stepped outer cylinder 12b that slides in the axial direction on the outer periphery of the cap-shaped inner cylinder 12a.
By pressurizing oil from c, the inner and outer cylinders 12a and 12b are moved apart in the axial direction.

As shown in the figure, the clamp cylinder 4 for tightening and fixing the table 1 to the bed 3, the stopper 9, the protruding rod 7, the hydraulic drive member 12, etc. are arranged in the required number at key points, and the table 1 is fixed. The fixation, parallel movement, and positioning of 1 are ensured.

Note that 13 is a hydraulic hose, 2a is an upper blade, and 14 is an upper blade holder that is moved by a slide.

A locking pin 4 is attached to the rod 4a of the clamp cylinder 4.
b to fit the keyway 15 in the hole in the bed 3.

The table side hole 16 above it is an elongated hole so that the rod 4a does not interfere with the movement of the table 1.

Of course, the table movement amount for clearance adjustment is 1
Although he is lower than Tomomi, he has enough strokes to spare for about 2 fights.

The numerous mounting bolts 17 for mounting the lower blade 2 to the table 1 and the tightening mechanism thereof are the same as before.

The retaining metal fitting 5 that engages with the tip of the rod 4a is sunk into the recessed hole 18 on the top surface of the table 1, so that it does not become an obstacle to placing the plate material to be sheared on the table 1.

This embodiment is the simplest one in which the target plate thickness range is divided into two stages: thick plate and thin plate. Two types of clearance are determined in advance for thick plate and thin plate, and the protruding rod head 11 is adjusted to fit the two types of clearance.
(timely stopper in front of the table) fine adjustment N1a and the stopper 9 when the table is retracted are adjusted in advance.

The stopper 9 is adjusted by inserting an L-shaped punch into the rear end of the screw 9a, and then fixed with a nut 9b.

When used in a thick plate clearance at a work site, the above-mentioned gap l is widened, that is, no oil is sent to the hydraulic drive member 12, and the table 1 pushed by the spring 8 is stopped by the protruding rod head 11. When used in a thin plate clearance, oil is sent to the hydraulic drive member 12 to close the gap l.
It is used with the table retracted and the table stopped by the stopper 9.

When changing from a thick plate to a thin plate or vice versa, the clamp cylinder 4 that fixes the table 1 is released prior to the operation of the hydraulic drive member 12 and is interlocked so that it is re-pressurized after the operation is completed.

Figure 5 shows an example of the hydraulic circuit, and the pressure oil is the pneumatically operated switching valve ■1. ■Since it enters the hydraulic drive member 12 and the clamp cylinder 4 via 2, it provides clearance for a thin plate.

A pressure switch S is attached to each of both circuits, and a check valve is installed to apply a predetermined pressure, in this example 250 Wd.

P is a pneumatic-hydraulic conversion device that converts the pneumatic pressure of the pneumatic circuit A into hydraulic pressure.

Rain pneumatic operation switching valve■1.Turn a knob (not shown) from the thin plate position to the thick plate position or operate a switch. (2) When switching 2, both the hydraulic drive member 12 and the clamp cylinder 4 lose their force, and the table 1 maximizes the gap l driven by the double spring 8.

In other words, the clearance is maximized.

Since the relay in the electric circuit that commands the pneumatically actuated switching valve 2 is set to return after a certain period of time, the clamp cylinder 4 fixes the table again after the gap 1 has widened.

Conversely, to narrow the clearance, the pneumatically operated switching valve ■1 is returned to the state shown in Fig. 5, and the pneumatically operated switching valve ■2 is operated and returned to loosen the clamp cylinder 4 for a certain period of time. Since the electric circuit is elementary, explanation will be omitted.

In the above embodiment, the clearance is changed to only two stages, one for thick plates and one for thin plates, but for example, the stopper 9 that stops the table from retreating within the gap l is a multi-stage plate-shaped stopper that moves along the gap, and its adjustment is possible. If a drive device (for example, a combination of air pressure and a limit switch) is used to bring any step into contact with the bed side protrusion, the hydraulic drive member 1
2 is activated, the gap l, or clearance, can be automatically adjusted to several stages.

Therefore, if the shearing machine has a wide range of capabilities from extremely thin plates to thick plates, it is easy to set the clearance to four levels, for example, for extremely thin plates, for thin plates, for medium plates, and for thick plates.

Also, the hanging edge 1a of table 1 is not attached to the front of the table,
Without changing the gist of this invention, it can be varied and applied in a variety of ways depending on the design conditions and the designer's known techniques, such as by providing it below the lower blade 2 on the rear surface of the table.

This idea eliminates the conventional clearance change work that required adjusting several adjustment screws each time it was needed on site, and changed it to a one-touch button operation.

In other words, instead of continuous or rearance adjustment, the adjustment is made in stages, divided into groups, and each stage is precisely adjusted in advance before shipping the shearing machine. The device allows the clearance to be changed immediately depending on the plate thickness.

The adjustment movement of the table is not done by mechanizing the rotation of the adjustment screw as in the past, but because all clearance settings are performed by a linear drive and each stopper, a simple table drive device can be used to push the table all the way to the stopper contact position. The device is simple, has good precision, has good parallelism of the blades, and has good stability against shearing impact.

The physical, mental, and economic benefits of freeing field workers from difficult clearance adjustments are enormous.

[Brief explanation of drawings]

Fig. 1 is a plan view of a shearing machine table (part) to which this invention is applied, Fig. 2 is a front view thereof, Fig. 3 is an enlarged sectional view of the main part, and Fig. 4 is another partial sectional view. Figure 5 is a hydraulic circuit diagram. 1... table, 3... bed, 4...
... Clamp device, 9 ... Stopper,
11... Protruding rod head (stopper), 12...
...Drive device.

Claims (2)

[Scope of utility model registration request] (1) - A table with a lower shearing blade attached to the edge, a bed on which this table is placed, and the above table and bed are fixed;
A clamping device for releasing, a driving device for moving the table relative to the bed, front and rear stoppers for controlling the back and forth movement of the table, and an interlocking mechanism for loosening the clamping device while the driving device is operating. and each stopper is manufactured and adjusted to create an appropriate cutting edge clearance for each of the multiple divisions of the plate thickness range targeted by the shearing machine. 'Dynamic adjustment device. (2) Utility Model Registration In the device described in claim (1), the hydraulic drive device is fitted onto a plurality of horizontal protruding rods protruding from the side surface of the upper end of the bed. An automatic blade edge clearance adjustment device for shearing machines that intervenes in the gap with the outside surface and works to widen the gap.