JPH0641938U - Forging press die fitting - Google Patents

Abstract

(57) [Summary] [Purpose] Improvement of metal fittings for detachably attaching the mold 2 to the die holder 1 of the forging press. The mounting metal fitting on the front side of the forging press includes a pressing metal fitting 4 that presses the mold side surface 21A, and a fastening metal fitting 5 that has inclined side surfaces 51 that are pressed by the inclined side surface 42 of the metal fitting.
An annular body 62 is detachably attached to a bolt shaft formed of a fastening bolt 6A and located in a space C on the lower surface formed when the fastening bolt is screwed into the die holder. [Effect] When the fastening bolt is loosened, the upper surface 65 of the ring body pushes up the lower surface 52 of the fastening fitting to separate strong contact between the inclined side surfaces, and the fitting fitting of the mold can be easily removed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a metal fitting for attaching a die to a die holder of a forging press.

[0002]

[Prior art]

 The upper and lower dies used for forming the material in the forging press may be directly attached to the main body of the forging press, but it is generally easy to replace multiple sets of dies unless a single die is always used. It is common practice to attach the die to the die holder and then attach the die holder to the forging press so that it can be carried out. To attach the mold to the die holder, use the mounting hardware shown in Fig. 5. That is, the die 2a is placed on the die holder 1a, and the rear fixing metal fitting 8a is attached to the rear surface of the forging press on the right side of the drawing by engaging the step 22b on the side surface 21b of the die 2a with the fastening bolt 6b. The mounting metal fittings used for the front surface of the forging press on the left side of the figure are a pressing metal fitting 4a which engages the side surface 21a of the mold 2a including a step and is pressed by the side surface 41a, and an opposite metal fitting 4a. And a fastening bolt 6a for fastening the fastening metal fitting 5a to the die holder 1a. The fastening metal fitting 5a is provided on a side opposite to the reverse tilting side surface 51a of the fastening metal fitting 5a. The front fixing metal fitting 7a closely attached to the pressing metal fitting 4a is fastened to the die holder 1a by the fastening bolt 6c so as to press the fastening metal fitting 5a against the pressing metal fitting 4a.

It goes without saying that the mold fixed to the die holder 1a cannot obtain a molded product of the correct size unless its position is accurately maintained. Therefore, it is necessary to strongly press the die on the upper surface of the die holder from the front and back, and firmly hold it so that the position will never change even if the forming pressure of a strong forging press is applied to the material in the die. is there. As described above, the outer side surface of the pressing metal fitting 4a that is in contact with the mold 2a is formed as the inclined side surface 42a, and the side surface of the fastening metal fitting 5a that is in contact with this inclined side surface is also combined as the inclined side surface 51a having an inverse slope to form the fastening metal fitting 5a. When tightening with the fastening bolts 6a, a wedge action acts between both inclined surfaces to generate a strong pressing force, which is fixed to the rear surface and the rear fixing metal fitting 8 is pressed against the side surface of the mold to keep the position immobile. .

[0004]

[Problems to be solved by the device]

 With the above structure, even if the material in the die receives a strong forging press forming pressure on the die holder, the position of the die does not change due to the pressure. However, since the fasteners 5a themselves are also fastened to each other by a strong wedge action, the work is completed and the die holder is removed from the forging press together with the die, and another die is attached to the die holder. There is a problem that the work of attaching to That is, since the mold, the pressing metal fitting 4a, and the fastening metal fitting 5a press each other by the wedge action with the inclined surface sandwiched therebetween, even if the fastening bolt 6a is removed, the pressing metal fitting 4a and the fastening metal fitting 5a are easily separated. It is very difficult work to separate them without separating them.

In order to separate the pressing metal fitting 4a and the fastening metal fitting 5a, the side surface of the pressing metal fitting 4a is hammered or a space C between the upper surface 11a of the die holder and the lower surface 52a of the fastening metal fitting 5a is struck. There was no choice but to deal with this by a comparatively primitive operation, such as driving in a wedge to float the fastener 5a upward. Another conventional method (1) is shown in a sectional view of FIG. 6 (A), and another conventional method (2) is shown in a plan view of FIG. 6 (B). In the conventional method (1), the bolt through hole 54b of the fastener 5b is a hole sufficiently larger than the screw diameter d of the tightening bolt, and the screw D is formed below the through hole. Since the tightening bolt (screw diameter d) can pass without meshing with the female screw D, it can mesh with the tapped hole (screw diameter d) formed in the die holder to tighten the fastener 5b. When opening the fastener 5b, remove the bolt (screw diameter d) and insert another bolt 6x with a larger diameter (male thread diameter D) into the hole of the fastener, and it will mesh with the female screw D and tap hole on the upper surface of the die holder. Reach (d). Since the diameter (D 1) of the bolt 6x is larger than the screw hole diameter (d) of the tap, when the bolt 6x is further rotated in the direction in which the bolt 6x is further advanced, the entry of the bolt 6x is stopped and the fastening fitting 5b rises. In this way, the fastener can be removed. In the conventional method (2), the tap holes 101 are made to penetrate at two locations separately from the fastening bolt through holes 54c of the fastening fitting 5c, and another loosening bolt is attached to the tap holes. Since there is no hole on the upper surface of the die holder below the tap hole, tightening the loosening bolt prevents the tip of the bolt from coming into contact with the upper surface of the die holder, but tightening the loosening bolt further causes the fastener 5c to die. The fastener 5c can be removed as it rises from the upper surface of the holder. In any case, the problem with the conventional method is that the force for raising the fasteners 5b, 5c upwards is applied to the tip of the slackening bolt to rotate the bolt while damaging the tip of the bolt and the upper surface of the die holder. Therefore, there is a problem that the bolt cannot be removed from the fasteners 5b and 5c, and in the case of (1), the upper surface of the screw d is damaged and the fastening bolt 6x cannot enter the screw hole. Moreover, even in the case of this method, after removing the fastening bolt, it is necessary to screw another bolt into the fastener 5b and remove the removed bolt when the fastener 5b comes off. However, in frequent daily work, it is extremely inefficient and extremely inefficient. Also, when screwing the draw-out bolts to both sides of the fastening bolt as shown in Fig. (B), unless the bolts on both sides are screwed in synchronism with each other, the fastener 5b tends to tilt and float up. At the same time, the task of screwing in faces the problem of further promoting the degree of complexity.

In order to solve the above-mentioned problems, the present invention can easily separate the members that are strongly constrained from each other in the above-mentioned structure when the mold is removed from the die holder, The purpose of the present invention is to provide a mounting bracket that enables highly efficient mold replacement.

[0007]

[Means for Solving the Problems]

 The die holder mounting metal fitting according to the present invention comprises a pressing metal fitting 4 that presses the side surface 21 of the mold 2 with the side surface 41, and an inclined side surface 42 on the opposite side of the pressing metal fitting 4 that is mounted on the front surface of the forging press. It is composed of a fastening metal fitting 5 having a reverse inclined side surface 51 which is in close contact, and a fastening bolt 6A for fastening the fastening metal fitting 5 to the die holder 1, and a space is formed in the lower surface 52 of the fastening metal fitting 5 facing the upper surface 11 of the die holder 1. Part C is provided, and the ring body 62 is attached onto the outer peripheral surface 61 of the fastening bolt 6A at a position corresponding to a space formed when the fastening bolt 6A is screwed into the upper surface of the die holder 1. The above problems were solved by.

Further, in contrast to this configuration, an annular projection 63 is integrally formed at the position of the fastening bolt 6A, and a U-shaped portion including a fastening hole 54 through which the fastening bolt of the fastening fitting 5 is inserted. The notch 55 may be changed to a structure in which the notch 55 is opened to the outer side surface.

[0009]

[Action]

 There is a step on the lower surface of the fastening metal fitting that faces the upper surface of the die holder, and a ring body projects on the outer peripheral surface of the bolt shaft that corresponds to the hollow part formed when the fastening bolt is screwed into the upper surface of the die holder. is doing. Due to this structure, when the fastening bolt is rotated and screwed upward, first, the screw engagement with the die holder begins to come off, but the ring body in the hollow portion also starts to rise vertically from the original position, As the upper surface of the annulus reaches the position where it abuts the lower surface of the fastener, and the annulus pushes the fastener up as the bolt shaft is further lifted, the strong pressure on both inclined surfaces of the pressure and fastener is released. Only the metal parts can be separated and lifted independently.

[0010]

【Example】

 1 is a partial cross-sectional view showing the gist of the present invention, FIG. 2 is a plan view of the entire die 2 attached to a die holder 1, and FIG. 3 is a cross-sectional view taken along the line AA of FIG. Details are shown in FIG. 1 and the whole is shown in FIGS. The rear side of the forging press is shown on the right side of FIG. 3, and the rear fixing metal fitting 8 is fastened and fixed thereto with the fastening bolts 6B. The predetermined position is fixed by fitting the step 12B on the upper surface of the die holder and the step 31 on the lower surface of the rear fixing member 8 and is usually not removed while being attached. The step 22B of the die 2 is fitted into the side surface step 32 of the rear fixing member 8 to set the reference position of the die 2.

It is the mounting bracket shown on the left side of the drawing that strongly holds the mold at this position. For details, as shown in FIG. 1, first, the side surface step 43 of the pressing metal fitting 4 is fitted into the step 22A of the mold 2, and the side surface 41 of the pressing metal fitting 4 is brought into close contact with the side surface 21A of the mold. The fastening metal fitting 5 is fitted between the front fixing metal fitting 7 which is always fastened on the upper surface 11 of the die holder by the fastening bolt 6C and the pressing metal fitting 4. The side surface of the pressing metal fitting 4 on the side opposite to the mold is an inclined side surface 42, and the reverse inclined side surface 51 of the fastening metal fitting 5 contacts this surface, and the side surface on the opposite side of the fastening metal fitting 5 is the side surface 71 of the front fixing metal fitting 7. Abuts vertically with. Furthermore, a step 72 is provided on the lower surface of the front fixing member 7 and is fixed to the step 12A on the upper surface of the die holder.

The fastening bolt 6A is screwed with the ring body 62 in a state of penetrating the fastening metal 5, and the pin 64 is inserted and fixed between the fastening bolt 6A and the ring body 62 so that the fastening bolt is rotatable. In this state, it is integrated with the fastener 5. The distance in the vertical direction of the space C between the lower surface of the fastener 5 and the upper surface 11 of the die holder is larger than the thickness of the brim-shaped annular body 62 when the fastener 5 is sufficiently fastened. is doing. Therefore, the fastener is fastened by screwing the fastening bolt 6A into the fastening hole 13 of the die holder, and the upper and lower surfaces of the ring body 62 do not contact the lower surface 52 of the fastener 5 and both surfaces of the die holder upper surface 11. Next, when the fastening bolt 6A is loosened, the ring body is fixedly attached to the outer peripheral surface of the bolt shaft so that the flange is apparently provided. Therefore, the fastening bolt is loosened and vertically moved to the upper portion. Along with this, the collar-shaped annular body also moves upward, and the upper surface 65 thereof comes into contact with the lower surface 52 of the fastening fitting 5. When the screw is further returned, the position of the annulus moves upward. Therefore, the upper surface 65 of the annulus is more strongly pushed up the lower surface 52 of the fastener 5 so that the fastener 5 moves away from the pressing fixture 4 that is in close contact with the inclined surface. And surface alone. In this embodiment, the fastening means for fastening the fastening bolt 6A and the ring body 62 is an example of screwing and pin 64. However, screwing and adhesive, screwing and split pin, screwing and caulking, and welding double nut are used. It goes without saying that means such as combination and crimping of cylinders with screw parts removed can be applied.

In any case, in the embodiment shown in FIG. 1, the fastening bolt 6A is inserted into the fastening hole 54 of the fastener 5, and then the ring is placed at a predetermined position of the bolt shaft projecting from the lower surface of the fastener 5. The procedure of mounting by the pin 64 is required. Another embodiment is shown in FIGS. 4A, 4B and 4C to eliminate this procedure. This is a structure in which the same position of the bolt shaft of the fastening bolt is integrally expanded to form a flange-shaped protrusion 63. Since the fastening bolt cannot be inserted into the fastening hole of the fastening metal fitting as it is, a U-shaped notch 55 including the fastening hole 54 of the fastening metal fitting 5B is provided and the configuration is opened to the side surface. A fastening bolt having a shaft whose diameter is expanded midway is fitted into a U-shaped notch opened from the side surface, and can slide horizontally to a fastening position. In this embodiment, the step of attaching and detaching the ring body after inserting the fastening bolts can be omitted and further simplified.

[0014]

[Effect of device]

 As described above, the present invention enables the mounting and releasing of the mold mounting bracket by simply tightening and loosening the fastening bolts. Therefore, two types of bolts for tightening and loosening are not required, and since only one female screw hole is required, no other screw hole processing is required. As a result, the metal fittings that strongly fixed the mold can be easily disassembled, which greatly contributes to the efficiency and labor saving of the replacement work. In addition, it not only eliminates the troublesome labor at the time of installation, but also frees you from dangerous manual work, which is a very favorable improvement in terms of occupational safety.

[Brief description of drawings]

FIG. 1 is a sectional view showing the gist of an embodiment of the present invention.

FIG. 2 is an overall plan view in which a die is attached to a die holder.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 shows another embodiment of the present invention in plan view (A), cross-sectional view (B) and view (C).

FIG. 5 is a sectional view showing a conventional technique.

6A and 6B respectively show cross-sectional views of two examples of the related art.

[Explanation of symbols]

 1 die holder 2 mold 4 pressing metal fitting 5 fastening metal fitting 6 fastening bolt 7 fastening bolt 7 front fixing metal fitting 11 upper surface (die holder) 12 step 13 fastening hole 21 side surface 22 step 41 side surface 42 inclined side surface 43 side surface step 51 inclined side surface 52 lower surface 53 step 54 Fastening hole 55 Notch 61 Outer peripheral surface 62 Annular body 63 Projection 64 Pin 65 Upper surface (annular body) C Hollow part

Claims (2)

[Scope of utility model registration request] 1. A front side of a die holder, a front fixing metal fitting 7 and a rear portion of which a rear fixing metal fitting 8 is fastened, and a side surface 41 between the front fixing metal fitting 7 and the mold 2 is in close contact with a side surface 21A of the mold 2. And a reverse fitting surface 51 that is in close contact with the inclined side surface 42 and a fastening fitting 5 that is in close contact with the front fixing fitting 7 and a fastening bolt 6A. Fastening bolt 6A at the time of fastening in the space C between the lower surface of the fastening metal fitting 5 and the upper surface of the die holder 1 in the mold mounting hardware.
A metal mold fitting for a forging press, characterized in that a ring body 62 is detachably mounted on the outer peripheral surface 61 of the. 2. The U-shaped notch according to claim 1, wherein an annular projection 63 is integrally formed at the position of the fastening bolt 6A, and a fastening hole 54 for inserting the fastening bolt of the fastening fitting 5 is inserted. A metal fitting for a forging press, which is characterized by opening 55 to the outer surface.