JPH0217693Y2 - - Google Patents

Description

[Detailed description of the invention] a. Industrial application field The invention relates to a radius bending mold, and more specifically, a mold holder installed in a press machine has a mold at the center in the width direction perpendicular to the longitudinal direction of the mold. A groove having a restricting effect in a direction perpendicular to the longitudinal direction of the mold is provided, and the mating part and the engaging part are brought into close contact with at least one of the grooves of the mold holder or the protrusion that engages with the grooves of the mold. This invention relates to a round bending die equipped with a biasing mechanism to

b. Prior Art For example, the press machine 1 illustrated in FIG. 1 is a machine called a press brake for folding plate material W (see FIG. 5), and the lower end of its immovable upper apron 3 has a A clamping device 7 is provided for gripping and fixing the mold holder 5 as shown.

The mold 9 illustrated in FIG.
Only the ba (punch) will be described as a representative of the mold 9, but the corresponding female mold (die) with a round groove bottom is also in almost the same situation, so a description thereof will be omitted.

The mold holder 5 shown in FIG. 4 is held by a clamp device 7 and extended in the longitudinal direction of the mold 9, and its lower end forms an inverted T-block 11.

The mold 9 is approximately a semi-round bar shape with a diameter having a desired radius of bending and has various dimensions and lengths.A plurality of bolts 13 and nut members 15 are provided in the longitudinal direction above the center of the mold 9. The mold holder 5 is fixed with the nut member 15 inserted into the gap between the block 11.
A mold 9 was fixed to the bottom surface of the mold.

c Problems to be solved by the invention The conventional device as described above has flange portions 17 at both longitudinal ends of the curved product as shown in Fig. 5.
In some cases, molds of various lengths and dimensions are used in a connected state, but since the gap between the T-blocks 11 described above remains unchanged, it is inconvenient that they cannot be used in any combination. Ta.

d Means for solving the problem In the present invention, a groove is provided at the center of the mold holder 5 in the width direction perpendicular to the longitudinal direction, and has a restricting effect on the mold in the direction perpendicular to the longitudinal direction. The problem was solved by providing at least one of the grooves or the protrusions that engage with the grooves of the mold 9 with an urging mechanism that brings the engagement portion into close contact with the other side.

e. Effect In this way, it becomes easy to assemble a mold having a desired overall length by arbitrarily combining various lengths in the longitudinal direction, and the above-mentioned disadvantages of the conventional device are solved.

f Embodiment In the embodiment of the present invention shown in FIG. This means that it is attached to Apron 3.

Furthermore, there is no space for the T-block 11 shown in FIG. 4 to fit the nut member 15, and there is no space penetrating the mold holder 5 in the front-rear direction (left-right direction in FIG. 2).

At the lower end of the mold holder 5 described above, a groove 19 is provided at the center in the width direction perpendicular to the longitudinal direction, and has a regulating effect on the mold in the direction perpendicular to the longitudinal direction. It has a dovetail groove.

The mold 9 is provided with a protrusion 21 that engages with the groove 19, and is dovetailed in the embodiment shown in FIG.

Further, grooves 23 and 25 are provided in the width direction of the groove 19 and the protrusion 21 described above, and a biasing force is exerted so that the engaging portions of the two are constantly pressed against each other.

The second embodiment of the present invention is illustrated in FIG.
The groove 19 of the mold holder 5 has a slightly complicated shape, and the protrusion 21 of the mold 9 is provided with a substantially horizontal split groove 25, and an inclined portion with a biasing force is provided above the split groove 25. 27 is in close contact with a sloped portion 29 provided corresponding to the groove 19.

Thus, the mold 9 of the embodiment shown in FIG.
It is always in close contact with the right wall of the groove 19.

The embodiments shown in A, B, and C of FIG.
It is provided with a groove 19 in the form of a groove, and B is the groove 1 in the form of a T groove.
It is equipped with 9.

Since the bullet 31 is compressed and provided in the protrusion 21 in the groove 19, the left joint surfaces of the grooves are pressed together and in close contact with each other.

g. Effects of the invention All of the apparatuses according to the embodiments of the invention described in detail above can be used by freely assembling molds of various lengths into desired lengths. Preparation and replacement are easy by pushing or pulling out molds of various lengths one after another from the longitudinal end of the upper apron, and there is no need for complicated bolt tightening.

Additionally, the mold holder does not have a cavity, making it resistant to bending stress.

Thus, the device that embodies the technical idea of the present invention has the advantage that the round bending mold can be replaced safely and quickly, and that any combination of lengths can be made freely.

It is also clear that the design can be easily changed without departing from the technical idea of the present invention.

[Brief explanation of drawings]

Figure 1 is a press machine as an example machine implementing the mold of the present invention, Figure 2 is a sectional view of an embodiment of the present invention,
Fig. 3 is an explanatory diagram showing the mold holder and mold shown in Fig. 2 separately, Fig. 4 is an explanatory diagram of a conventional device, Fig. 5 is an explanatory diagram of radius bending work, and Fig. 6 is an explanatory diagram of the present invention. The second embodiment and FIG. 7 show the third embodiment using a bullet, respectively.
It is a 4th and 5th Example figure. Explanation of symbols representing main parts of the drawings: 1...Press machine, 5...Mold holder, 9...Mold, 19...
...Groove, 21...Protrusion, 23...Split groove, 25...
...split groove.

Claims (1)

[Scope of utility model registration request] A groove is provided in the center of the mold holder provided in the press machine in the width direction perpendicular to the longitudinal direction of the mold, and has a regulating effect on the mold in a direction perpendicular to the longitudinal direction. A radius bending mold characterized in that at least one of the protrusions that engage with the groove of the mold is provided with a biasing mechanism that brings the engagement portion into close contact with the other side.