JPH048158B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a mechanical press device, and more particularly to an improvement in a press device for processing members such as sashes for vehicles or construction, moldings for automobiles, and the like.

BACKGROUND TECHNOLOGY For example, when press forming moldings and sashes for automobiles, usually a metal strip material of a certain width is formed into a profiled material with a given cross section, or a resin extrusion molded into a profiled material with a fixed cross section. After cutting the long material into a desired length, the long material is subjected to processes such as partial cutting, drilling, notching, bending, and drawing. Specifically, in the processing process of Weatherstrip Belt Molding M (see Figure 1), which is made by composite extrusion molding of soft vinyl chloride resin and a metal plate such as a stainless steel plate, the belt is cut to a certain length after composite extrusion molding. (See Figure a) If the cross-sectional shape is complex, deformation is likely to occur, whereas if the cross-sectional shape is relatively simple, such as a U-shape, it may be possible to leave the running cut as is. , many require recutting to trim the edge f. After cutting the edge including a part of the outer surface part A (see figure b), cut out a part of the lower side B of the edge for subsequent bending and fix it with a clip etc. A square hole C is formed (Figure c
), and finally the terminal portion D is bent into a predetermined shape (see Figure d).

Conventionally, floating dies have been used as press dies for this type of processing, and four presses, for example, are installed along a conveyor that runs in a straight line, and one person is assigned to each press. Mass production is possible by assigning workers.

By the way, in the automobile industry, as social and user needs are diversifying, we are trying to reduce wasteful inventory as much as possible, and moreover, provide users with "what they need, when they need it, in the amount they need, right away."
There is a shift to the so-called kanban method or just-in-time method, which allows production and delivery. When processing moldings for automobiles using this method, for example, one worker must be in charge of four steps, and multiple molds are fixed as one unit to one press machine. It is necessary to insert the molding terminal into each mold and perform processing.

To deal with this, the stroke from the top dead center of the ram to the bottom dead center is always constant and cannot be changed in the same press device, but the height from the bolster surface of the press device to the bottom dead center position of the ram is That is, since the shaft height is adjustable, it is conceivable to adjust the shaft height. However, it is often necessary to adjust the processing stroke for actually pressing the die during the trial stage after the press die is completed, especially when there are multiple dies that include a drawing die or a bending die. For example, when we test the actual bending die, it is often 1 to 5 mm.
Often requires some degree of adjustment. To adjust this, for example, if the stroke amount is too large, the bottom plate of the mold can be ground down, and vice versa, if it is insufficient, an additional bottom plate can be fixed to the bottom of the mold. If you adjust the shaft height of the entire press as a standard, the shaft height of other adjacent molds will become inappropriate, and subtle differences in bending will occur depending on the lot of material used, so it is desirable to be able to adjust it for each lot. . However, the relationship between the press stroke and shaft height (see Fig. 2) is determined by fixing four molds A to D on one bolster of the press machine, and determining the most desirable bottom dead center for each mold. The optimal position is a′~
If d', the shaft height from above the bolster surface will vary, and it is completely impossible to obtain the optimal shaft height for each mold using a normal press machine. In addition, in Figure 1, points a~
d is the position of each open height.

DISCLOSURE OF THE INVENTION An object of the present invention is to provide a press device that can easily obtain different shaft heights using a single upper frame that moves up and down, and can be manufactured at a lower cost than a normal crank press device.

That is, in the press apparatus according to the present invention, there is provided a bolster on which a plurality of press molds are placed side by side on a plate surface, an upper frame that moves up and down with a constant stroke with respect to the bolster, and a lower surface of the upper frame. A plurality of press plates are installed on the side and press the press mold on the bolster as the upper frame moves downward, and each of the press plates is interposed between each press plate and the upper frame. The press plate and the spacer plate are screwed together with screws formed on each opposing surface that can be screwed in or unscrewed to increase the amount of protrusion of each press plate. They are constructed by being assembled with each other in a freely adjustable manner from the bottom surface of the frame.

In this press device, the press plate and the spacer plate are screwed together by screws formed on opposing surfaces that can be screwed in and unscrewed, and are combined with each other so that the amount of protrusion of the press plate can be adjusted from the bottom surface of the upper frame. The shaft height of each pressure plate can be adjusted individually by screwing the pressure plate into or out of the spacer. In addition, when pressing the press mold with each press plate, the spacer plate comes into contact with the bottom surface of the upper frame, so the load associated with each press plate pressing the press mold on the bolster is reduced. A stable shaft height can be obtained by being supported by the spacer plate and the upper frame.

In addition, the press device according to the present invention includes a bolster on which a plurality of press molds are placed side by side on a plate surface, an upper frame that moves up and down with a constant stroke with respect to the bolster, and a lower surface of the upper frame. A plurality of pressing plates are installed on the side and press the press mold on the bolster as the upper frame moves downward, and a spacer plate is interposed between each of the pressing plates and the upper frame, In addition, the press plate and the spacer plate are attached to the upper frame so that they can be freely separated from the lower surface of the upper frame via a cylinder that positions the spacer plate in contact with the lower surface of the upper frame when pressing the press mold with each press plate. The press plate and the spacer plate are screwed together with screws formed on each opposing surface that can be screwed in or unscrewed, and the spacer plate separated from the lower surface of the upper frame is screwed in or unscrewed by the cylinder. It is constructed by combining the pressing plates with each other so that the amount of protrusion of each pressing plate can be freely adjusted from the lower surface of the upper frame.

This press device not only functions in the same way as described above, but also because the press plate and spacer plate are attached to the upper frame via a cylinder that positions each spacer plate in contact with the lower surface of the upper frame. When adjusting the shaft height, extend the stroke of the cylinder to separate the spacer plate from the bottom surface of the upper frame. In this state, screw the pressure plate into or unscrew it from the spacer plate, then reduce the stroke of the cylinder to remove the spacer plate. This can be done with a simple operation of positioning it in contact with the bottom surface of the upper frame.

Embodiment The following will be described with reference to FIGS. 3 to 6.

In this press device (see Fig. 3), a substantially rectangular plate-shaped bolster 1 on which press dies A, B, C, and D are placed and fixed is fixed to a frame 2. Grooves 11a, 11b, and 11c are formed in which roller devices (not shown) that allow molds A to D to be slid when placed are accommodated therein. On the other hand, inverted T-shaped grooves 12a and 12b are continuously formed in the longitudinal direction for storing and locking a part of a clamp (not shown) for fixing the press molds A to D on the bolster 1. ing. Furthermore, cylindrical guide posts 3a and 3b are fixed approximately in the center on both ends of the bolster 1 in the longitudinal direction with bolts, etc., and inside the guide posts 3a and 3b are round bar-shaped guides that can freely slide up and down. Bars 4a and 4b are inserted therethrough. The lower ends of the guide bars 4a, 4b pass through holes 13 provided in the bolster 1, and one end of a connecting rod 51 is connected to the flat tip 41 via a pin. The other end of the connecting rod 51 is fitted into the side surface of the flywheel 52, and a gear is formed on the outer periphery of the flywheel 52. Although not shown, the same flywheel as the right side is arranged on the left side of the drawing, and the left and right flywheels are connected by a shaft. Gear 53 that meshes with the gear of flyhole 52
is connected to a pulley 55 via an electromagnetic clutch 54. An electric motor 57 is connected to the pulley 55 via a V-belt 56, and the guide bars 4a, 4b are moved up and down by the drive of the electric motor 57. In addition, guide bars 4a, 4b
On the upper end side 42, the upper frame 6 has an end 61 and a nut 62.
It is tightened and fixed. Therefore, the height dimension of this upper frame 6 with respect to the bolster 1 is the nut 62.
The shape of the screw 43 can be adjusted by rotating the shape. In addition, the upper frame 6 can be configured with a wide intermediate part 63 and narrow widths at both ends 61, integrally made of metal casting or welded steel plates, so as to increase bending rigidity in the vertical direction, and the intermediate part 63 has a space inside. Three reinforcing plates 66, 6 that are approximately gutter-shaped and have both side parts 64 and a bottom part 65, and connect the both side parts 64, 64.
6 and 66. The upper frame 6 is supported by pneumatic cylinders 44, 44 to prevent the guide bars 4a, 4b from becoming eccentric when they slide up and down, and to move up and down in a well-balanced manner.
Air is supplied to only one port of these cylinders 44, 44 so that the rods of the cylinders are always extended.

A mechanism is attached to the upper frame 6 to allow adjustment of the shaft height of each of the molds A to D individually. The adjustment mechanism 7 (see Fig. 4) is
It consists of a disk-shaped pressing plate 71 and a ring-shaped spacer plate 72. The press plate 71 has a cylindrical convex portion 71a at the center of the main body, and the spacer plate 72 is ring-shaped and threaded on the circumferential surface, and has a relative screw 73 with a screw cut on the outer periphery of the convex portion of the press plate 71.
The press plate 71 is screwed onto the press plate 71. Further, on the upper frame 6 side, a pneumatic or hydraulic fluid cylinder 75 that expands and contracts in strokes is provided as a support for the press plate 71 and is fixed to a support plate 74 wider than the width of the side wall 64 by tightening with bolts or the like. The tip of the rod of the cylinder 75 is screwed into the pressing plate 71 through a long hole provided in the bottom 65 of the upper frame 6, and is securely fixed thereto. An air cylinder is preferably used as the cylinder 75, and its operating circuit (see Fig. 5) includes the weight of the rod and piston of the cylinder 75, the pressure plate 71 attached to the tip of the rod, and
The rod expands due to the weight of the spacer plate 72, and when using the press device, it is preferable to incorporate a device that operates the solenoid 75a to retract the rod. The operating circuit preferably includes a lubricating oil supply 75b and a pressure regulator 75c. Further, since the cylinder 75 is placed on the upper frame 6 by the support plate 74, its position can be adjusted in accordance with the molds A to D placed on the bolster 1. Instead of the cylinder 75, the press plate 71 can be supported by a spring or a screw shift, but if the cylinder 75 is used, the shaft height can be adjusted very easily.

In the press device configured in this way, the distance H from the lower surface of the upper frame 6 to the lower surface of the press plate 71 is
(See Fig. 4a) When adjusting the press device, first stop the operation of the press device and turn off the solenoid 75a of the cylinder 75.The fluid inside the cylinder is discharged to the outside of the cylinder and is pushed downward by its own weight or by hand. The rod of cylinder 75 can be extended by pulling it. When it is extended, a gap is created between the upper surface of the spacer plate 72 and the lower surface 65 of the upper frame 6 (see FIG. 6a), and in this state, the entire mechanism is placed on the bolster 1 of the press mold A horizontally elongated hole 67 was manually made in the bottom plate of the upper frame 6 so as to be located directly above it.
, and then rotate the spacer plate 72 clockwise while holding the pressure plate 71 lightly with your hand.
moves downward, and the shaft height can be increased by the gap h (see Figure 6b). After completing the predetermined adjustment, when the solenoid 75a is operated to move the rod of the cylinder 75 backward, the upper surface of the spacer plate 72 is pressed against the lower surface 65 of the upper frame 6, and is firmly fixed to the upper frame ( (See Figure 6c).
On the contrary, if the shaft height is to be shortened, the spacer plate 72 may be rotated counterclockwise to increase the gap h between the spacer plate 72 and the presser plate 71. In addition, if the strength of both side parts 64 of the upper frame 6 is increased, the upper frame 6 can be composed of both side parts 64 and a reinforcing part 66. In this case, since the bottom plate is unnecessary, the horizontally elongated hole 67 is also unnecessary.

Effects of the Invention As described above, according to the press apparatus according to the present invention, the shaft height can be individually adjusted for each press die by simply adjusting the gap between the press plate and the spacer plate, and Therefore, the time required to replace and adjust the press mold is extremely short.
In addition, when the lower surface of the press plate presses the press mold, the pressure is transmitted to the upper frame via the press plate and the spacer plate, so the durability in use can be improved since no pressure is applied to the support means of the press plate. In addition, since it can be constructed with a simple mechanism, the production cost can be reduced by about half compared to a crank press that is normally on the market and has a bolster of approximately the same size.

[Brief explanation of drawings]

Figures 1 a to d are explanatory diagrams showing the processing conditions of the workpiece to be press-worked; Figure 2 is a graph showing the relationship between cylinder stroke and shaft height for each mold when assembled in the same press device; Figure a,
4b is a front view and a side view of the press apparatus according to the present invention, FIGS. The pressure circuit diagram and FIGS. 6a to 6c are explanatory views of the operation of the adjustment mechanism. 1: Bolster, 6: Upper frame, 71: Pressing plate, 72: Spacer plate, 73: Relative screw, 75:
Pressure plate support (cylinder).

Claims (1)

[Scope of Claims] 1. A bolster on which a plurality of press molds are placed side by side on a plate surface, an upper frame that moves up and down with a constant stroke with respect to the bolster, and an upper frame equipped on the lower side of the upper frame. and a plurality of press plates that press the press mold on the bolster with the downward movement of the upper frame, each of the press plates including a spacer plate interposed between each press plate and the upper frame. The pressure plate and the spacer plate are screwed together with screws that can be screwed in or unscrewed formed on each opposing surface, so that the amount of protrusion of each pressure plate can be adjusted from the bottom surface of the top frame. A press device characterized in that the press devices are adjustable and combined with each other. 2. The press device according to claim 1, wherein the support for the press plate is provided so as to be movable in the horizontal direction with respect to the upper frame. 3. A bolster on which a plurality of press molds are placed side by side on a plate surface, an upper frame that moves up and down with a constant stroke with respect to the bolster, and a press mold installed on the bottom side of the upper frame and mounted on the bolster. It is equipped with a plurality of press plates that press the mold as the upper frame moves downward, a spacer plate is interposed between each of the press plates and the upper frame, and each press plate presses the press mold. The press plate and spacer plate are attached to the upper frame so that they can be freely separated from the lower surface of the upper frame through a cylinder that brings the spacer plate into contact with the lower surface of the upper frame when pressing, and the press plate and spacer plate are attached to each other. They are screwed together with screws that can be screwed in or unscrewed formed on the opposing surfaces, and the amount of protrusion of each pressing plate is adjusted to the extent of the upper frame by screwing in or unscrewing the spacer plate that is separated from the bottom surface of the upper frame using the cylinder. A press device characterized by being combined with each other so as to be freely adjustable from the bottom surface. 4. The press device according to claim 3, wherein the cylinder is provided so as to be movable in the horizontal direction with respect to the upper frame.