JPS6160299A - Press device - Google Patents

Abstract

PURPOSE:To improve an accuracy of shut height control by installing a plural pressing plate on an upper frame of a constant stroke in serial and interposing a spacer plate between the upper frame and the pressing plate. CONSTITUTION:Guide bars 4a, 4b are provided in guide bushes 3a, 3b of bolster 1 and an upper frame 5 is fixed on the upper edge. On the upper frame 5, a control structure 6 is provided to control a shut height against the metal dies A-D individually, and the pressure plate 61 and a ring-spacer plate 62 are provided. The clearance which occurs between the upper surface of the spacer 62 and a under surface 55 of the upper frame 5 is moved below, and a spacer board 62 and the below surface 55 of the upper frame 5 are fixed by acting a cylinder 65. The accurate shut height can be obtd. by this controlling method.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a mechanical press device, and particularly relates to an improvement of a press device for processing members such as sashes for vehicles or construction, moldings for automobiles, etc. .

Conventional technology For example, when press-forming moldings and sashes for automobiles, a metal strip material of a certain width is usually formed into a profiled material with a predetermined 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, bending notches 6, and drawing. specifically,
The processing process for Weatherstrip Belt Molding M (see Figure 5), which is made by composite extrusion molding of soft vinyl chloride resin and metal plates such as stainless steel plates, involves running and cutting the molding to a certain length after composite extrusion molding (see Figure 5). (see a), those with a complicated cross-sectional shape are likely to be deformed, and some with a relatively simple cross-sectional shape such as a U-shape may be left cut as they are, but in many cases the end A recut to trim the edge f is required. Its edge is the outer surface A
After cutting including a part of the end (see the same figure), a part of the lower side B of the end is notched for subsequent bending processing, and a square hole C is formed in which a clip or the like is fitted and fixed. (see C), the end portion is finally bent into a predetermined shape.

Conventionally, floating dies were used as press dies for this type of processing, and four presses were installed along a conveyor that ran in a straight line, with one person working on each press. Mass production is possible by assigning personnel.

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, we are trying to produce ``what you need, when you need it, in the amount you need, and right away'' for users. can be delivered. There is a shift to the so-called campan method or just-in-time method. With this method, when processing moldings for automobiles, one worker, for example, has to carry out four steps, and one unit is used to form two molds in one press machine. It is necessary to fix multiple molds and insert the end of the molding into each mold to 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 In other words, since the shut hide is adjustable, it is conceivable to adjust the shut hide.

Problems to be Solved by the Invention 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. For example, when the bending die is tested for actual processing, it is often necessary to adjust the bending die by about 1 to 51. If there is too much, you can shave the bottom plate of the mold, and vice versa, if there is not enough, you can fix an additional bottom plate to the bottom of the mold, but if you adjust the shut-hide of the entire press based on one mold, it will be adjacent. The shut hide amount of other molds may be inappropriate, and slight differences in bending may occur depending on the loft of the material used, so it is desirable to be able to adjust each loft. The relationship (see Figure 6) is that four molds A to D are fixed on one bolster of a press machine, and the most desirable optimal position of the bottom dead center of each mold is determined by a.
' to d', the shut hide from the bolster surface will be different, and it is completely impossible to obtain the optimum shut hide for each mold using a normal press machine. Note that 9 points a to d in FIG. 6 are the positions of each open height. In addition, even if these shut hides and strokes are set theoretically, it is necessary to conduct a trial in advance to confirm whether they are set accurately or not. If the work is performed under normal pressure after inserting the workpiece, for example, if the forming die is a drawing die and has a large protrusion toward the ram side, the press die will close before the die reaches the bottom dead center of the stroke. If the machining end point is reached, there is a risk that the entire machine will stop due to hitting the workpiece and causing a so-called squeezing phenomenon.Relieving this biting requires extremely troublesome work. Not only is this necessary, but in the worst case, it may lead to troubles such as damaging the mold or deforming the press device.

Means for Solving the Problems In the press device according to the present invention, a guide bush fixed to the bolster surface is connected to the upper end of the shaft of a guide bar that is slidably supported up and down. A top rail that moves up and down with a constant stroke is provided, and the top frame is equipped with a plurality of suppression plates in parallel via appropriate support means, and between each pressure plate and the top frame, a Abutting spacer plates are interposed, each of the spacer plates is screwed together with a pressing plate by a relative screw, and a rotary drive shaft is eccentrically connected to the lower end of the shaft of the guide bar via a connecting rod, and A drive motor is connected to the rotational drive shaft, and a friction disc-type fluid clutch is interposed in the drive power supply system of the drive motor, thereby creating a flow path that supplies normal fluid pressure to the fluid clutch and reduced fluid pressure. It is configured to selectively incorporate a flow path for supplying .

Function: With this press device, the shut hide by each pressing plate can be adjusted individually by screwing in or unscrewing the space plate, and at the time of trial shot, each pressing plate can be moved downward with reduced driving pressure, so each shut hide can be adjusted individually. Even when the adjustment is not set accurately, it is possible to prevent the phenomenon of digging in, etc.

An example will be described below with reference to FIGS. 1 to 4.

In this press apparatus (see FIGS. 1a and 1b), a substantially rectangular plate-shaped bolster 1 on which press molds A, B, C, and D are mounted and fixed is fixed to a frame 2. That bolster 1
A groove 11a that accommodates a roller device (not shown) that allows the press molds A to D to be slid when placed on the plate surface;
llb and llc are formed toward the back of the drawing, and in the lateral direction there is an inverted T-shaped groove 12a that accommodates and locks a part of a clamp (not shown) that fixes the press mold A-D on the bolster l. .

12b are formed continuously. A cylindrical guide bushing 3a is provided on both sides of the bolster 1 in the width direction.
3b is fixed with bolts or the like, and round guide bars 4a, 4b that are vertically slidable are inserted into the guide bushes 3a, 3b.

An upper frame 5 is fastened at an end 51 to the upper shaft end side 41 of the guide bars 4a, 4b with a nut 52. The height of the upper frame 5 relative to the bolster I can be adjusted within the shaping range of the screw 42 by rotating a nut 52. In addition, the upper frame 5 is constructed with a wide intermediate part 53 and narrow end parts 51, integrally made of metal casting or welded steel plates, to increase bending rigidity in the vertical direction, and the intermediate part 53 has a space inside. It has a substantially gutter shape with both sides 54 and a bottom 55, and three reinforcing plates 56 connecting the both sides 54 and 54.

The upper frame 5 is supported by pneumatic cylinders 43 and 43 to prevent the guide bars 4a and 4b from becoming eccentric when they slide up and down and to move up and down in a well-balanced manner. The cylinders 43, 43 are supplied with air to only one boat so that the rods of the cylinders are always extended.

A mechanism is attached to the upper frame 5 that allows the shut hide for each mold A to D to be adjusted individually. The adjustment mechanism 6 (see FIGS. 2a and 2b) includes a disc-shaped pressure plate 61 and a ring-shaped spacer plate 62. The pressure plate 61 has a cylindrical convex portion 81a at the center of the main body, and the spacer plate 62 is ring-shaped and has a thread cut on the inner circumferential surface and has a relative screw 63 with a screw cut on the outer circumference of the convex portion of the press plate 61. are screwed together. Further, on the upper frame 5 side, a pneumatic or hydraulic cylinder 65 is provided which is fixed to a support plate 64 wider than the width of the side wall 54 with bolts or the like. The cylinder 65 has a rod tip located at the bottom 5 of the upper frame 5.
It is screwed together with the suppression plate 61 through the elongated hole 57 provided in the plate 5, and is securely fixed thereto. An air cylinder is preferably used as the drive cylinder 65, and its operating circuit includes the weight of the rod and piston of the cylinder 65 and the pressure plate 61 attached to the tip of the rod when the press device is not used. The rod expands due to the weight of the spacer plate 62, and when using the press device, it is preferable to incorporate a device that operates the solenoid 65a to move the rod back.In this operating circuit, a lubricating oil supply device 88b and a pressure regulator B5c are installed.
Moreover, since the drive cylinder 65 is mounted on the upper frame 5 by the support plate 64, its position can be adjusted in accordance with the molds A to D placed on the bolster 1. In addition, since this drive cylinder 65 causes slight lateral displacement from the corresponding positions of the molds A to D during continuous operation of the press device, a bar 58 having rack-shaped teeth is fixed to the top or side surface of the upper frame 5. At the same time, it is preferable that a plate 66 having rack-shaped teeth is attached to the support plate 64 of the drive cylinder 65 and meshed with each other to prevent positional deviation. Moreover, instead of this drive cylinder 65, the shut-off can be adjusted by supporting the pressing plate 61 with a spring or a screw shaft.
If the drive cylinder 65 is used as described above, the shut-off can be adjusted very easily.

A guide bar 4a has this upper frame 5 on the upper end side of the shaft.

4b passes through the hole 13 provided in the bolster 1, and
One end of a connecting rod 71 is connected to the flat tip 44 via a pin 45 (see FIGS. 1a and 1b). A small gear 74 is connected to the flywheel 73 , and a small gear 74 is disposed in mesh with the toothed outer peripheral edge of the flywheel 72 . A rotary drive shaft 75 is supported at the center of the gear 74, and a drive motor 78 connected by a V-belt 77 via a clutch, preferably an air clutch 76, operated by fluid pressure is attached to the other end of the drive shaft. ing.

The air clutch 76 incorporated into this drive system is a friction disc type with a built-in diaphragm, and the clutch valve of the air clutch 76? 5a
For example, 5.5Kg/cm required for normal driving.
A flow path 80 that supplies an air pressure of about 2.2 kg/c and a flow path 82 that supplies a relatively reduced air pressure of about 2.5 kg/c layer 2 via a pressure reducing valve 81 are switchably connected by a solenoid 83. It is installed (see Figure 3).

In the press device configured in this way, when adjusting the distance H from the bottom surface of the upper frame 5 to the bottom surface of the press plate 61 (see Figure 2) before the trial stage, the operation of the press device is first stopped. Solenoid 85a of drive cylinder 65
When turned OFF, the fluid inside the cylinder is discharged to the outside of the cylinder, and the rod of the cylinder 65 can be extended by its own weight or by lightly pulling it downward by hand.

In the extension, the upper surface of the spacer plate 62 and the lower surface 5 of the upper frame 5
5 (see Fig. 4C), and in this state, the entire mechanism was placed on the bottom plate of the upper frame 5 by hand so that it was positioned directly above the press mold placed on the bolster 1. After sliding it laterally along the hole 57, the spacer plate 62 is moved downward by rotating the spacer plate 62 clockwise while pressing the pressure plate 61 lightly with your hand (see Figure 4). The shut hide can be increased by the gap H-α (see Fig. 4C). After completing the specified adjustment, actuate the solenoid 85a to move the rod of the cylinder 65 back, and the spacer plate 62 The upper surface is pressed against the lower surface 55 of the upper frame 5 and is securely fixed to the upper frame 5.

On the contrary, when shortening the seat height, the spacer plate 62 is rotated counterclockwise and the holding plate 62 is rotated counterclockwise.
It is only necessary to increase α with respect to 1.

When performing a trial after the adjustment, the air supply path to the air clutch 76 is changed to the pressure reduction flow path 82 by switching the solenoid 83, and the air pressure is reduced from the air pressure required for normal press drive to the air through the guide bars 4a and 4b. to move the upper frame 5 up and down. In this trial, if there is variation in each shut hide, it is because the contact of each press plate 61 with the molds A-D is different, and the impression of the press blade of the mold on the workpiece placed on each mold is different. Based on this, the amount of protrusion of the pressing plate 61 can be individually adjusted to the required shut hide. When each of these shut hides can be set accurately, the solenoid 83
This time, the air pressure required for normal press drive can be supplied from the flow path 80 to the air clutch 76, and the drive motor 78 can perform the press operation.

Effects of the Invention As described above, according to the press apparatus according to the present invention, the shut I\light can be adjusted individually for each press mold simply by adjusting the gap between the press plate and the spacer plate. Therefore, the time required to replace and adjust the press mold is extremely short, and the trial can be performed with reduced pressure driving force, so even if there are variations in each shut hide at that stage, the press plate can be adjusted to the mold. It becomes possible to adjust the shut hide to obtain accurate shut hide with a simple operation without causing a situation such as digging into the shut hide.

[Brief explanation of drawings]

1a and b are a front view and a side view of a press device according to the present invention, FIGS. 2a and 2b are a partially cutaway front view and a plan view of a shut-hide adjustment mechanism incorporated in the same device, and FIG. 3 Figure 4 is an air supply circuit diagram for the air clutch built into the same device, Figures 4 a to c are explanatory diagrams of the operation of the shut-hide adjustment mechanism, and Figures 5 a to d are processing states of the workpiece to be press-formed. FIG. 6 is a graph showing the relationship between cylinder stroke and shut hide for each mold assembled in the same press device. l: Bolster, 3a, 3b guide bush, 4a,
4b Ni guide bar, 5: Upper frame, 61: Pressing plate, 6
2 Spacer plate, 63: Relative screw, 65: Support means such as pneumatic cylinder, 71: Connecting rod, 75: Rotation drive shaft, 76
: Fluid clutch, 78: Drive motor, 80: Normal air pressure supply flow path, 82: Decompression air supply flow path, 83: Switching solenoid. Figure 5 a Figure 5 C Figure 5 d Procedural amendment November q, 1980 Patent application No. 183324 2, name of invention Press device 3, relationship with the case of the person making the amendment Name of patent applicant Title Hashimoto Forming Industry Co., Ltd. 6, drawings subject to amendment 7, contents of amendments Figures 2 and 3 will be corrected as shown in the attached sheet.

Claims (1)

[Claims] By connecting to the upper end of the shaft of a guide bar that is slidably supported up and down by a guide bush fixed to the bolster surface, an upper frame that moves up and down with a constant stroke with respect to the booster surface is provided, and the upper frame is parallel to the upper frame. A plurality of pressure plates are each equipped via appropriate support means, and a spacer plate that contacts the lower surface of the upper frame is interposed between each of the pressure plates and the upper frame, and each spacer plate is used as a pressure plate. Screwed in with a relative screw, unscrewed, and rotatably screwed together, and furthermore, a rotary drive shaft is eccentrically connected to the lower end of the shaft of the guide bar via a connecting rod, and a drive motor is connected to the rotary drive shaft,
By interposing a friction disc-type fluid clutch in the drive power supply system of this drive motor, the fluid clutch can be selectively switched between a flow path that supplies normal fluid pressure and a flow path that supplies reduced fluid pressure. A press device characterized in that it can be incorporated.