JPH0596333A - Die - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Providing a punching die suitable for punching a large number of holes without shearing at least two opposing side edges of a material with large plate thickness and without causing waste holes. .. The die 12 is provided with holes corresponding to the first shear blade 36 and all punches. A punch support member 38 is provided so as to face the die, and the punch 14 is detachably mounted via a second shearing blade 44 and a number of punch guides 24. An escape hole 46 having a diameter larger than that of the punch head is bored in the punch support member coaxially with the punch, and a floating plate 48 is inserted into a recess provided in the upper side surface of the punch support member so that the bolt is supported. It is installed detachably. The floating plate is provided with a plug 50 for closing the escape hole to operate the punch according to a specific pattern, and prohibits the escape of the punch. With the above configuration, by exchanging the floating plate, it is possible to punch a specific pattern without causing a discard hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention shears at least two opposing side edges of a plate-like material having a large plate thickness such as side rails and cross members which form a chassis frame of a truck, a tractor, and the like, and rivets and bolts. The present invention relates to a suitable punching die which is adopted when punching a large number of holes for inserting fasteners such as.

[0002]

2. Description of the Related Art Conventionally, for medium- and large-sized trucks, tractors, etc., a pair of left and right side rails extending in the vehicle front-rear direction and both end portions extending in the vehicle width direction are attached to the side rails by rivets or bolts. A ladder-shaped chassis frame composed of a plurality of fixed cross members is widely adopted. The side rails of the undercarriage frame are usually formed of a grooved material of steel plate having a plate thickness of about 6 to 8 mm,
The cross member is formed of a thin steel plate material having a thickness of about 4 to 6 mm, an I-shaped material, or a press-molded product having a hat-shaped cross section.

The above side rails and cross members include
A large number of holes for inserting rivets and bolts are provided for connecting the two to each other and for mounting the engine, the suspension device, and various other components. As is well known in the art, in the case of medium- and large-sized trucks, a large number of series vehicles having different specifications such as the engine, the type of parts to be mounted, and the size are manufactured for one basic vehicle model. Normally, the above basic model and series models are
In order to reduce the manufacturing cost, essentially a common chassis frame is used, and the multiple holes for inserting the rivets and bolts provided in the side rails and cross members thereof have multiple punches for punching holes. It is processed by a strong press using an upper die adapter or a punch holder, and a punching die composed of a lower die adapter or a die holder having a die having a die hole cooperating with each punch.

A typical construction of the above-mentioned punching die which has been widely adopted will be described with reference to FIG. Reference numeral 1 in the figure
Reference numeral 0 is a lower die adapter or die holder which is attached to a bed of the press or a lower die mount by an appropriate fixing means, 12
Is a die mounted on the lower mold adapter 10,
The die 12 is provided with a large number of die bushes 18 (only two are shown in the figure for simplification) having punched holes 16 for punching holes in cooperation with the punch 14 according to a desired hole arrangement pattern. It is arranged. The upper mold adapter 2 is opposed to the lower mold adapter 10 on the shank or ram of the press.
0 is attached to the punch plate 22, which is detachably attached to the lower surface of the die adapter 20 by bolts or clamps. A large number of punches 14 are attached by punch guides 24 in accordance with a desired hole arrangement pattern. ing. A guide plate 28 is arranged below the punch plate 22 via an elastic member 26 such as rubber or spring, and the guide plate 28 is connected to the upper mold adapter 20 via a guide member such as a guide post (not shown). Together with this, it is configured to move up and down.

When using the punching die having the above structure to punch holes in the side rails or cross members of the chassis frame, a separate punching die or a shearing device is first formed into a predetermined shape of about 4 to 8 mm. The plate-shaped material B having a thickness of 1 is mounted on the upper surface of the die 12 at a predetermined position. Next, the upper die adapter 20 attached to the shank or ram of the press
When the tool moves downward toward the die 12, the guide plate 28 abuts against the upper surface of the plate-shaped material B and presses the material B, and the upper die adapter 20 moves down while compressing the elastic member 26, whereby a large number of punches 14 are punched. Cooperates with the punching hole 16 of the die bush 18 to punch the material B. FIG. 3 shows a state in which the punching by the punch 14 is completed, and thereafter, the upper die adapter 20 is lifted together with the punch 14 to make the punch 1.
The small-diameter punching portion of 4 is pulled out from the punched hole, and the drilling process is completed. The punching part of the punch 14 is the material B.
Since the material B is pressed by the elastic member 26 while it is being ejected from the punching hole, the punch is smoothly ejected.

The punch plate 22 to which the above-mentioned many punches 14 are attached has a lateral dimension of 50 cm or more depending on the case, and a dimension perpendicular to the plane of the drawing of 1 to 2 m depending on the case. It is a large-sized and heavy-weight member, and of course, its price is quite high.
Since it takes a lot of time to attach and detach to and from the above, it is necessary to prepare a large number of punch plates 22 having different hole arrangement patterns for each of the series vehicle models, which causes a significant increase in manufacturing cost. Therefore, after forming a large number of common punched holes including all hole arrangement patterns in the material B so that it can be shared by many vehicle types, for example, in the case of a side rail, the material B is bent into a groove shape. Is processed. After that, for each specific vehicle type, the necessary punching holes are selected from among a large number of punching holes, the side rails and cross members are connected, other parts are attached, and the remaining punching holes are so-called discard holes. Be left as. As an example, when a certain vehicle type was investigated, about 60 to 70% of the punched holes of the chassis frame were actually used, and the remaining 30 to 40% were discarded holes. As described above, the presence of a large number of discard holes inevitably has an adverse effect on the strength of the chassis frame itself, and it is easy to erroneously assemble the parts by using the wrong holes. There is a problem, and there is also a defect that creates a vague feeling of anxiety and distrust of users such as trucks in terms of strength and insufficient mounting of parts.

In order to solve the various problems associated with the above-mentioned waste hole, the applicant has previously proposed an improved punching die as shown in FIG. In this already proposed punching die, a large number of punches 14 are mounted so that they can freely slide on the punch plate 22 in the punch axial direction, that is, in the vertical direction in the drawing, and at the same time, the upper die adapter 20 is specified. Corresponding to the hole arrangement pattern of the car model, a shallow recess 30 for accommodating the punch head 14a is provided so as to prohibit the punch 14 to be punched in the material B from being displaced in the axial direction thereof. Head 1 of punch 14 corresponding to the above-mentioned waste hole
The portion corresponding to 4a is provided with a deep recess 32 that allows a displacement of the punch in the axial direction.

As shown in the drawing, when the plate-shaped material B is mounted on the upper surface of the die 12 mounted on the lower mold adapter 10 and the upper mold adapter 20 is lowered, the head 14a is housed in the shallow recess 30. The punch 14 thus operated operates as usual to punch a hole in the material B, and the punch 14 having the head 14a housed in the deep recess 32 makes an idle motion in the axial direction. It is not punched, so no waste holes occur. By adopting this improved punching die, there is an advantage that all the various problems associated with the aforesaid throwing holes are eliminated. However, for each car model with different punch hole layout patterns,
Since a large number of large and heavy upper adapters 20 have to be prepared, there is a problem that a large increase in manufacturing cost cannot be avoided. Further, even in the same vehicle model, the punch guide hole 34 for slidably inserting the punch 14 of the punch plate 22 is simply buried in order to cope with a slight change in the hole position which is frequently performed on a daily basis, for example, a movement of several millimeters. Since it was necessary to re-drill the holes, it was not flexible enough to make a small design change, and eventually the chassis frame manufacturing cost was increased. Further, in the above-mentioned punching die, since a plate-shaped material is first formed into a predetermined size and shape, a forming process using a separate die or a shearing device is required, so the number of processing steps is increased, and the manufacturing cost is increased. Will be correspondingly increased.

[0009]

DISCLOSURE OF THE INVENTION The present invention solves various problems caused by the existence of the above-mentioned waste holes and, at the same time, improves the drawbacks of the previously proposed punching die to manufacture a chassis frame or the like. It is an object of the present invention to provide this die-cutting die which can further reduce the cost.

[0010]

The present invention was devised in order to achieve the above-mentioned object, and a first shearing blade member for shearing at least opposite side edges of a plate-like material and a large number of punching punches. A die having a large number of holes for punching holes in the plate-shaped material in cooperation with each other, and the die is disposed so as to face the die and cooperates with the first shearing blade member to form the side of the plate-shaped material. A second shearing blade member for shearing the edge is provided, and a large number of the punching punches are detachably attached through the punch guides, respectively, and the punching punches are allowed to move in the direction away from the die. Punch support members each having an escape hole coaxially arranged with respect to the punch, and punches which are detachably mounted on the punch support member and which should be punched according to a desired punching pattern in the plate-shaped material. Corresponding to the above escape A floating plate having a plug inserted therein to prohibit the displacement of the punch, and an upper die adapter detachably attached to the punch support member to transmit the pressing force of the press to the punch support member; The punch support member and a knockout member which is vertically inserted into the upper die adapter and is pressed against the plate-shaped material mounted on the die by an elastic member housed in the upper die adapter. This is to propose a characteristic die.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be specifically described below with reference to FIGS. (Note that members and portions substantially equivalent to or corresponding to those of the conventional typical punching die shown in FIG. 3 and the already proposed punching die shown in FIG. According to the present invention,
The first shearing blade member 3 is provided on both left and right edges of the die 12 in the drawing.
6 is provided. A punch support member 38 is disposed so as to face the die 12, and the punch support member 38 is attached to the upper die adapter 20 by an auto clamp 40 or a detachable bolt known per se. The punch support member 38
At the lower ends of the left and right leg portions 42 formed to extend below
A second shearing blade member 44, which cooperates with the first shearing blade member 36 to shear the opposing left and right side edges of the plate-shaped material B to a uniform size, is mounted on the intermediate lower surface of the left and right leg portions 42. A large number of punches 14 are detachably mounted via a punch guide 24 in accordance with a common arrangement pattern including hole arrangement patterns of a plurality of series vehicle models. Further, the punch support member 38 is provided with escape holes 46 coaxially with the punch 14 and having a diameter sufficiently larger than the outer diameter of the punch head 14a. In addition, a floating plate 48 is inserted into a recess provided on the upper side surface of the punch support member 38 and is detachably mounted by a bolt or the like.

In the floating plate 48, in a clearance hole 46 corresponding to the punch 14 for punching a hole according to the hole arrangement pattern for a specific car model of the series car model, the punch 14 is separated from the die 12. A plug 50 for prohibiting axial displacement of the punch 14 is removably mounted by a bolt or the like, and another escape hole 46, which corresponds to a conventional discarding hole, allows an idle motion displacement of the punch 14 in a direction away from the die 12. Is left as a hole. It is generally preferable to prepare a plurality of floating plates 48, and while the floating plates having a certain hole arrangement pattern are attached to the punch support member 38 and the punching operation is performed, other floating plates are performed subsequently. For the hole punching work of the hole arrangement pattern, it is desirable to perform a preparatory work for mounting the plug 50 according to each hole arrangement pattern.

A space 52 is formed inside the upper mold adapter 20, and an elastic member 26 such as rubber and a knockout plate 54 that abuts on the elastic member 26 are accommodated in the space 52. The bottom wall of the upper mold adapter 20, the floating plate 48, and the upper end of a knockout rod 56 slidably inserted through the punch support member 38 are fixed to the lower surface of the knockout plate 54, and the lower end of the knockout rod 56 is It is in contact with a guide plate 28 that presses the plate-shaped material B.

In FIG. 1, after a plate-shaped material B whose right and left side edges are not machined to size is mounted on the upper surface of the die 12,
The upper die adapter 20 is lowered and the punch support member 38 reaches a position close to the plate-shaped material B. At this time, the knockout member including the knockout plate 54 and the knockout rod 56 is in contact with the guide plate 28. When the upper die adapter 20 is continuously lowered, the punch support member 38 is integrally lowered while the elastic member 26 is compressed, as shown in FIG.
The first and second shearing blade members 36 and 44 shear the left and right side edges of the plate-shaped material B to an exact size, and the scrap B ′ cut off falls along the die 12. On the other hand, the punch 14 attached to the punch support member 38 descends and the head 50 is attached to the plug 50 fixed to the floating plate 48.
A hole is punched in the plate-shaped material B by the punch 14 with which the 4a abuts, and the punch 14, which is coaxially arranged with the escape hole 46 in which the plug 50 is not inserted, moves freely in the escape hole 46. Without punching, a large number of holes are punched in the plate-shaped material B according to a desired hole arrangement pattern.

According to the above-mentioned punching die of the present invention, since the plate-shaped material B can be sheared to an exact size as well as punching a large number of holes, one working step can be omitted, and correspondingly. The manufacturing cost can be reduced. In addition, since the discard holes can be removed from the side rails and cross members of series vehicles with different hole layout patterns, it is possible to effectively prevent the strength reduction of the chassis frame and the misassembly of parts due to the discard holes. There is an advantage that the vague anxiety or distrust of the user can be eliminated.

Further, when punching holes such as side rails having different hole arrangement patterns, the auto clamp 40 or bolts are removed to separate the punch support member 38 from the upper die adapter 20, and the shank or ram of the press is raised. When the upper mold adapter 20 is moved upward, the elastic member 26 and the knockout member (that is, the knockout plate 54 and the knockout rod 56) supported inside the upper mold adapter 20 are raised, so that the small and lightweight floating plate 48 is Since it may be replaced with another floating plate having a different hole arrangement pattern, there is an advantage that the preparation work time can be shortened, the press operating rate can be improved, and the manufacturing cost of the chassis frame and the like can be reduced. Also, punch 1
4 is removably attached to the punch support member 38 by the punch guide 24. Therefore, by forming the diameter of the escape hole 46 to be sufficiently larger than the outer diameter of the punch head 14a, the hole position that is frequently used on a daily basis can be set. There is an advantage that a slight change can be easily dealt with by simply shifting the position of the punch 14. The cutting die according to the present invention,
It can be widely applied not only to the regular size processing and punching of the material of the side rails and cross members of the truck chassis frame but also to punching a large number of holes in a relatively thick plate-like material at the same time by punching. Further, in the above-mentioned embodiment, an example is shown in which two opposite side edges of the plate-shaped material B are sheared to be machined to an exact size. However, when not only two opposite side edges but all four circumferences are sheared, that is, a plate The present invention can be applied to the case of punching out the outer shape of a sheet material.

[0017]

As described above, the cutting die according to the present invention is
A die having a large number of punch holes for punching holes in the plate material in cooperation with a first shear blade member for shearing at least opposite side edges of the plate material and a large number of punch punches; And a second shearing blade member that is arranged to face each other and that cooperates with the first shearing blade member to shear the side edge of the plate-shaped material, and the plurality of punching punches are respectively provided through punch guides. The punch support member is detachably attached, and each punch support member has an escape hole coaxially arranged with respect to the punch to allow displacement of the punching punch in a direction away from the die. Freely installed,
A floating plate having a plug which is inserted into the clearance hole corresponding to a punch of a hole to be punched according to a desired punching pattern in the plate-shaped material and prohibits the displacement of the punch of the same; An upper die adapter removably attached to the support member for transmitting the pressing force of the press to the punch support member, and an elastic member inserted in the punch support member and the upper die adapter so as to be vertically movable and accommodated in the upper die adapter. And a knockout member that is brought into pressure contact with the plate-shaped material mounted on the die according to the above, and at the same time as the plate-shaped material is subjected to the exact size processing, a large number of holes arranged in various hole arrangement patterns are provided. A plate-shaped material having holes can be processed at low cost without providing a waste hole, which is extremely useful in industry.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state immediately before shearing and punching of a material side edge of a punching die according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state after shearing and punching of a side edge of a material of the punching die shown in FIG.

FIG. 3 is a cross-sectional view showing a state after punching a conventional punching die.

FIG. 4 is a cross-sectional view of an already proposed mold that is an improvement of the punching mold shown in FIG.

[Explanation of symbols]

 12 die 14 punch 20 upper die adapter 24 punch guide 26 elastic member 36 first shear blade member 38 punch support member 44 second shear blade member 46 escape hole 48 floating plate 50 plug

Claims (1)

[Claims] 1. A plurality of punch holes for punching holes in the plate material in cooperation with a first shear blade member for shearing at least opposite side edges of the plate material and a number of punch punches. A die and a second shearing blade member that is disposed so as to face the die and that cooperates with the first shearing blade member to shear the side edge of the plate-shaped material; and each of the plurality of punching punches. A punch support member which is removably attached via a punch guide, and which has escape holes coaxially arranged with respect to the punches so as to allow a lost motion displacement of each punch in a direction away from the die; The punch support member is detachably mounted, and is inserted into the escape hole corresponding to the punch of the hole to be punched according to the desired punching pattern in the plate-shaped material to prohibit the idle movement displacement of the punch. Flow with plug Plate, an upper die adapter that is detachably attached to the punch support member and transmits the pressing force of the press to the punch support member, and an upper die adapter that is vertically inserted into the punch support member and the upper die adapter. And a knockout member pressed against the plate-shaped material mounted on the die by the elastic member housed in the die.