JPH0327698Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is a method of attaching a plurality of upper and lower molds to the mounting surface of a mounting base provided on the bed or ram of a press machine to press metal plates, etc. 1 for each round trip of the ram
This invention relates to a mold fixing device used in a transfer press machine, etc., which sequentially performs multiple steps of press processing by moving the mold in pitches.

[Prior art] When multiple molds are lined up on a mold mounting surface and fixed using a presser metal fitting, if there is a difference in thickness between the parts of the left and right molds that are held down by the presser metal fittings, the presser metal fittings may be tilted and both sides may be There are those described in Japanese Utility Model Application Publication No. 53-163345 and Japanese Patent Publication No. 59-5373 which are designed to hold down the mold.

[Problem that the invention attempts to solve]

The device described in Japanese Utility Model Application Publication No. 53-163345 is provided with a swing piece at the top of the clamp piece body that is raised and lowered by a lift drive mechanism such as a hydraulic cylinder, and the inclination of the swing piece allows the left and right metal plates of different thickness to be attached. It is designed to hold down the mold, but since the oscillating piece is long in the front and back, if the thickness of the part of the left and right mold that is held down by the oscillating piece changes in the front and back direction, It cannot be pressed evenly over the entire length. To solve this problem, if the swinging pieces are divided into short pieces and arranged in the front-rear direction, a clamp piece body must be provided for each swing piece, and each clamp piece body must be raised and lowered by a separate lifting drive mechanism. There is a problem that the mold cannot be pressed uniformly.

The product described in Japanese Patent Publication No. 59-5373 can solve the above problem, but since the presser metal fittings are inclined only to one side, it is necessary to alternately arrange the metal fittings with opposite sides during assembly. Since a large number of presser fittings must be placed in contact with each other, there is a problem in that the number of presser fittings increases and assembly is time-consuming.

[Means for solving problems]

In order to solve the above-mentioned problems, this invention divides the left-right symmetrical presser metal fittings into a plurality of parts and arranges them side by side on the mold mounting surface. Bearings are provided at the front and rear of the presser metal fittings, and a rotatable camshaft that passes through each bearing has a circular shaft portion that rotatably fits into the circular hole of each of the bearings, and a circular shaft portion that fits into the cam hole of each of the presser metal fittings as appropriate. An equiangular helical cam that fits with play is provided, and the lower part of each of the holding metal fittings is fitted into a recess provided in the mounting surface so as to be able to swing freely, and a spring that pushes each of the holding metal fittings upward is installed in the recess. It was established.

[Effect]

Since this device has the above-mentioned configuration, the left and right molds are placed on the mold mounting surface with the camshaft in the inactive position, and the protrusions on both sides of each mold are connected to the holding part of each holding fitting. When the cam shaft is rotated, each cam rotates within the cam hole of each presser metal fitting, and the presser metal fitting is pushed down through the cam hole.

The presser parts on both sides of the pressed down metal fitting press the protrusions of the molds on both sides onto the mold mounting surface, but at this time, if there is a difference in height between the left and right protrusions, the presser metal fittings press down on the lower one. It tilts toward the protrusion and presses the left and right protrusions equally with the holding parts on both sides.

〔Example〕

In FIG. 1, 1 is a lower mold mount fixed on the bed of a press, and 2 is an upper mold mount provided on the lower surface of the ram of the press.

3 and 4 are a pair of front and rear bearings fixed to the mounting surface on the mounting base 1, and 5 is an intermediate bearing, both of which are T-shaped as shown in Fig. 3, and each has a step passing through the center. Fixing bolt 6 inserted into the bolt hole with
The upper end of the bolt hole is closed with a lid.

7 is a plurality of presser fittings (two in the figure), and the fourth
T having presser parts 10 on both sides as shown in FIGS.
It is symmetrical in the shape of a letter. Reference numeral 8 denotes a longitudinal groove provided in the mounting base 1, in which each of the bearings 3, 4,
5 is fitted, and the lower part of the presser metal fitting 7 is fitted with an appropriate amount of play, and the presser metal fitting 7 is held in place by the filler 9 made of a soft elastic material such as rubber.
This prevents dust from entering into the groove 8 while allowing movement of the groove 8.

11 is a recessed hole provided at the bottom of the groove 8 so as to be located at the lower center of each presser metal fitting 7;
The pusher 12, which is fitted in a vertically movable manner, is pushed up by the spring 13, and the spherical upper end of the pusher 12 is brought into contact with the tapered recess 14 on the lower surface of the metal fitting 7.

16 is a camshaft, and this shaft 16 is
As shown in the figure, two equiangular helical cams 18 that fit into the cam holes 15 of the metal fitting 7 are formed, and a square shaft 19 is engaged at the tip of the cam shaft 16 with a handle for rotating the cam shaft.
Or form a square hole. The above equiangular spiral cam 18
As shown in the cross-sectional view of Fig. 7, the radius becomes shorter by a certain length at each fixed angle, and when the circumference a is expanded into a straight line, the circumferential surface b of the cam becomes a circle as shown in Fig. 8. It forms a slope at a constant angle θ with respect to the circumference a.

The circular shaft portion 17 of the camshaft 16 has a circumference concentric with the circumference a. Further, the outer diameter of the circular shaft portion 17 is set to be equal to or larger than the maximum diameter of the cam 18 portion so that the cam shaft 16 fits into the holes of the bearings 3, 4, and 5 during assembly.
5 and the holes in the bearings 3, 4, and 5.

In the above embodiment, as shown in FIG.
4, the presser metal fitting 7 is raised.

In the above state, place the mold 20 on the mounting surface of the table 1, put the protrusions 21 on both sides under each presser 10, and then turn each knob 22 in Fig. 1 (not shown). The mold 20 is positioned by raising the dowel pin, and then the handle is engaged with the square shaft 19 and the camshaft 16 is rotated clockwise toward FIG.

As a result, the outer periphery of the equiangular spiral cam 18 presses down the slope a at the bottom of the cam hole 15 of the presser fitting 7, so that the presser parts 10 on both sides of the pressed metal fitting 7 attach the protrusions 21 of the left and right molds 20 to the mounting bases. Press down toward the mounting surface above 1 as shown in Fig. 5 to fix it.

In the above-described operation, if the left and right protrusions 21 have different heights, the metal fitting 7 is inclined to apply pressure to the left and right protrusions 21 equally.

After fixing the left and right molds 20 with the presser fittings 7 in this way, pressing work is performed, and then the molds 20
To remove the metal fittings 7, turn the camshaft 16 in the opposite direction, and each metal fitting 7 will be returned to its original position by the spring 13.

Furthermore, each of the bearings 3, 4, and 5 has an overhang on both sides as shown in FIG. 3, but this overhang serves as a guide for the protrusion 21 of the mold 20. , the mold 20 is not used to pressurize the protrusion 21.
Even when the bearings 3, 4, and 5 are fixed, the overhangs and protrusions 21
There is a gap between them.

In addition, the same presser metal fitting 7 is attached downward to the lower mounting surface of the upper mounting base 2, and the upper mold 23
The protrusions 24 on both sides are fixed in the same manner as in the case of the lower part. Further, on the outermost side where there is no mold, a pedestal 25 is fixed to the mounting bases 1 and 2 in place of the mold, as shown in FIG.

〔effect〕

As mentioned above, this device is equipped with bearings located between the presser fittings arranged in front and back and in front and behind the front and rear presser fittings, and a rotatable cam shaft that passes through each bearing is attached to each of the presser fittings. An equiangular helical cam is provided that fits into the cam hole with an appropriate amount of play, and the lower part of each of the presser metal fittings is fitted into a recess provided in the mounting surface so as to be able to swing freely, and each of the presser metal fittings is fitted into the recess. It is equipped with a spring that pushes upward, and the circular shaft of the camshaft is rotatably fitted into the circular hole of each bearing, and the camshaft serves as a supporting shaft.
No separate support shaft is required, the structure is simple, and assembly is easy. Moreover, in the case of this invention, only one type of presser metal fitting is required, which is symmetrical in shape with holding parts at the tops of both sides, and this one type of metallizer is tilted to the left or right to uniformly attach the left and right molds to the mounting surface. Since the left and right molds are pressed against each other, even if there is a slight difference in dimensions between the left and right molds, or even if there is a slight difference in thickness between the parts of the same mold that are held down by the presser metal fittings, it will be securely fixed. The number of presser fittings can be increased without limit, and the right and left presser fittings serve as guides when attaching the mold, making it easier to attach the mold.

[Brief explanation of drawings]

Figure 1 is a front view of the fixing device of this invention, Figure 2 is an enlarged longitudinal section of the lower part of the same, and Figure 3 is Figure 2-
Fig. 4 is a longitudinal sectional front view along the line from Fig. 2, Fig. 5 is a longitudinal sectional front view of the same part when the mold is fixed, Fig. 6 is a perspective view of the camshaft, and Fig. 7 is a longitudinal sectional front view along the line. FIG. 8 is an enlarged cross-sectional view of the cam, and is a developed view of the cam with the circumference made straight. 1, 2... Mounting base, 3, 4, 5... Bearing, 7
... Presser metal fitting, 10 ... Presser part, 13 ... Spring,
15...Cam hole, 16...Cam shaft, 17...Circular part, 18...Equilateral spiral cam, 20, 23...Mold, 21, 24...Protrusion.

Claims (1)

[Scope of utility model registration request] A presser fitting that can be tilted left and right is provided on the mold mounting surface, and when the upper surfaces of the protrusions of the left and right molds placed on the mold mounting surface are pressed by the presser portions on both sides of the presser fitting, the left and right In the mold fixing device configured such that the above-mentioned presser metal fittings are inclined according to the difference in height of the upper surface of the protrusion of the mold, a plurality of left-right symmetrical presser metal fittings having presser portions on both sides of the upper part are provided. divide,
These are arranged one behind the other, and bearings are provided between each of the holding fittings and before and after the holding fittings at the front and rear ends, and a rotatable camshaft that passes through each bearing has a A circular shaft part that rotatably fits into the circular hole and an equiangular helical cam that fits into the cam hole of each of the presser metal fittings with appropriate play are provided, and the lower part of each of the presser metal fittings is placed in a recess provided in the mounting surface. A mold fixing device that is swingably fitted into the recess and is provided with a spring that pushes each of the holding metal fittings upward.