JPS5927936Y2 - press brake table - Google Patents

Description

[Detailed description of the invention] This invention relates to a table for a press brake.

Generally, when bending a metal plate using a press brake, the metal plate is placed on a die attached to a table, and then bent by a punch attached to a descending ram.

However, in a normal press brake, both ends of the table are fixed to the frame, and the rams are operated by receiving force from hydraulic cylinders near each end.

Therefore, when bending a metal plate, loads are applied to the table and the ram that are laterally distributed downward and upward, respectively, so that the table bends slightly downward and the ram bends slightly upward. curved to

Due to this curvature, the metal plate cannot be bent completely as it approaches the center; for example, even if the metal plate is intended to be bent by 90 degrees, the bend may end up being about 100 degrees near the center.

In order to correct the upper surface of the table by curving it in the opposite direction in advance, a plurality of wedge-shaped members 91 whose lower surfaces are inclined in the front-rear direction are attached to the lower surface of the supporting member 90 at the upper part of the table, as shown in FIG. If the wedge-shaped movable member 92 is adjusted by moving forward and backward along the lower surface, there will be a portion that makes local contact and is likely to be damaged by high surface pressure, or even if you try to return the movable member with a spring. Reliable operation may not be possible, such as being unable to return to normal mode.

This invention solves these problems and provides a press brake table that corrects the deflection of the table and ram by making smooth contact while avoiding local contact.

An embodiment of this invention will be described below with reference to the drawings.

In one embodiment of the invention shown in FIGS. 1-6, 10 is a frame.

Reference numeral 11 denotes a table attached to this frame to support dice (not shown), and is constructed as described below.

That is, reference numeral 13 denotes a fixed part, in which a front member 15 and a rear member 16 extending laterally are fixed to the front and rear parts of the upper end of the central member 14 whose both ends are fixed to the frame 10, respectively. A groove-shaped space 17 is formed above the front member 14 and extends laterally between the front member 15 and the rear member 16.

Reference numeral 18 denotes a support member disposed to extend laterally along the upper surface of the fixing portion 13, and grooves 19 extending laterally for attaching dies are formed on the front and rear surfaces, respectively.

Reference numeral 20 denotes a recess-forming member having a spherical recess 22 formed on the lower surface by being fixed to the lower surface of the support member by a bolt 21. The recess-forming member 20 is fitted into the space 17 so as to be movable up and down, and a plurality of recesses are provided at appropriate intervals.

Reference numeral 23 designates a spherical member having a spherical part 25 which is in spherical contact with the spherical recess 22 and is rotatable in all directions, and the opposite side of this spherical part is a sliding surface 26 which is slidable.

27 are provided in the same number as each spherical member 23, and are arranged in the space 1.
7 is a movable member housed so as to be movable in the front-rear direction.The upper surface forms an inclined surface 28 that slopes downward toward the rear, and both sides of this inclined surface are made slightly higher to prevent the sliding of the spherical member 23. It contacts the moving surface 26 and is supported slidably in the front-rear direction.

Reference numeral 30 denotes a groove formed on the lower surface of the movable member 27 in the front-rear direction, and 31 is a protrusion member attached to the fixed portion 13 so as to engage with this groove and guide the movable member 27 in the front-rear direction.

32 is a hole formed over a predetermined length from the rear surface side of the movable member 27.

33 is a screw hole bored through the front member 15 in front of the movable member 27.

Reference numeral 35 designates an adjustment member having a threaded portion 36 that is screwed into each screw hole 33, and a narrow diameter portion 37 that is not threaded is formed at the rear end, and a scale portion 38 is provided at the front end. be.

This scale portion 38 may not be formed.

A hole 40 is penetrated through the rear member 16 at a position opposite to the screw hole 33, and a female thread 41 is cut in the rear end.

42 is a screw that is screwed into this female thread, and 43 is a helical spring whose rear end abuts this screw and whose front end abuts the movable member 27 (L32) and exerts elasticity so as to press it forward.

Therefore, the movable member 27 is in contact with the adjustment member 35 in the space 17, and when the adjustment member 35 is rotated and the movable member 27 is moved rearward, the spherical member 27
the support member 18
The part placed above it rises slightly.

A small length of, for example, about 1 mm at most is sufficient.

When the adjusting member 35 is rotated in the opposite direction, the movable member 27 slides against the spherical member 23 by the spring 43 and moves forward, so that the upper part of the movable member 27 of the support member 18 can be lowered. .

45 movably penetrates a hole 46 drilled in the support member 18 and has its tip end screwed together from above the central member 14 of the fixed part 13. For example, a plurality of movable members 27 are arranged alternately with the movable member 27, etc., and are arranged at appropriate intervals. bolt with its head 47 and hole 46
A helical spring 50 is wound between the movable member 27 and the stepped portion 48, so that when the movable member 27 moves forward, the portion of the support member 18 above it is lowered.

In the configuration as described above, the central portion of the support member 18 is curved upward to cancel out the total deflection distribution due to the bending of the table 11 and the ram when a load is applied. If each adjustment member 35 is adjusted to move the movable member 27 forward or backward, the table 11
Also, the influence of ram deflection can be eliminated.

Further, even if the support member 18 is deflected when a load is applied, the spherical member 23 can always maintain spherical contact with the recess forming member 20, so that a large load is not applied locally.

Further, the zero point of the scale portion 38 of each adjusting member 35 may be set based on a standard load condition, and the zero point of the scale portion 38 may be adjusted appropriately when the load is different.

In this invention, as shown in FIG. 7, a screw hole 51 is formed in the movable member 27 without using a spring 43, and an adjusting member 35 having a screw portion 52 to be screwed into the screw hole 51 is held at a predetermined position. Rotatably supported, this adjustment member 35
The movable member 27 may be moved forward and backward by rotating.

In this case, the upper surface of the movable member 27 may be inclined in a direction opposite to that in the above embodiment, as shown in the drawing.

Note that various modifications can be made to this invention; for example, the spherical recess 22 may be formed directly in the support member 18.

Further, there are cases where only one set of the spherical recess 22, the spherical member 23, the movable member 27, and the adjusting member 35 is provided in the central portion.

As mentioned above, this invention has a spherical recess 22 and a spherical member 23.
is always in spherical contact, so when a load is applied, there are no parts that come into local contact and receive high surface pressure, so there is no damage or unstable movement, and there is no effect of deflection due to the load on the table and ram. This has the effect of being able to correct.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of this invention, Fig. 2 is a side view thereof, Fig. 3 is a plan view thereof, Fig. 4 is a sectional view taken along line A-A in Fig. 1, and Fig. 5 is a cross-sectional view of the device. 4, FIG. 6 is a CC sectional view in FIG. 3, FIG. 7 is a sectional view of main parts showing another embodiment of this invention, and FIG. 8 is a case not based on this invention. FIG. 10 is a frame, 11 is a table, 13 is a fixed part, 17
18 is a space part, 18 is a support member, 22 is a spherical recess, 23 is a spherical member, 25 is a spherical part, 26 is a sliding surface, 27 is a movable member, 28 is an inclined surface, and 35 is an adjustment member.

Claims (1)

[Scope of utility model registration request] The fixing part is disposed at the bottom and has both ends fixed to the frame and extends laterally, and a supporting member extends laterally along the upper surface of the fixing part to attach and support the die. One or more spherical recesses are formed directly or indirectly on the lower surface of the support member, and the support member further has a spherical part that makes spherical contact with the spherical recess and is rotatable, and is opposite to the spherical part. The same number of spherical members as the number of the spherical recesses whose side is a sliding surface are disposed in a space formed in the upper part of the fixing part so as to be movable in the front and rear direction, and are in contact with the sliding surface of the spherical member. The same number of movable members as the spherical member forming a slidable slope inclined in the front-rear direction, and the same number of adjustment members as the movable members that allow the movable member to be adjusted forward and backward in the front-rear direction. Press brake table characterized by containing.