JPH0455764B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention consists of a plurality of upper molds and a lower mold, each of which has a plurality of molds, the lower mold of one or more of these molds is fixed, and the other lower mold is fixed. A press machine that has a structure in which both the die and the upper die can be moved horizontally relative to the fixed die, and the upper die corresponding to the fixed lower die can be moved in minute dimensions. It is.

Generally, in a press machine using this type of NC (numerical control) device, the workpiece is transported to the processing position and positioned according to the commands of the NC device, and then the hammer is operated according to the commands of the NC device to move the workpiece to the upper die. The punch is lowered to process the workpiece located between the upper die and the lower die.

However, when using conventional press machines to perform processing such as drilling or bending on a workpiece, for example, it is necessary to change the pitch of the processed holes when drilling, or the bending width when bending. In order to change the thickness or material of the workpiece, the press machine is stopped each time, the required mold is selected from a large number of prepared molds, and the replacement is done manually. I was making minor adjustments to the dimensions,
This exchange takes several tens of minutes, so
Since this machine processes a large number of pieces (100 to 500 pieces per minute), manual replacement time occupies most of the entire processing time, and it requires many types of molds, resulting in poor productivity and economy. It was a processing method. As described above, the conventional processing method has the disadvantage that it is not possible to automatically make fine adjustments to the dimensions when changing the pitch of the holes or changing the bending width, plate thickness, or material.

This invention was made in order to eliminate the above-mentioned drawbacks.Both the upper mold and the lower mold are each configured into a plurality of molds, and the lower mold of one or more pairs of molds is fixed. Then, both the lower mold and the upper mold are structured to be movable relative to the fixed lower mold, and the upper and lower molds are processed by adjusting their movement in the horizontal direction using a controllable drive device. To provide a press machine in which the holes can be set at a desired pitch and the bending width dimension can be freely set, and an upper mold corresponding to a fixed lower mold can be moved by minute dimensions to a desired position. It is.

This invention will be explained below.

Figures 1a and b are front and side views showing one embodiment of the present invention, and Figures 2a and b are side views showing an enlarged main part of Figure 1b, and Figure 2a FIG. 3 is an enlarged plan view taken along line BB in FIG. 1. In these figures, 1 is the lower base of the press machine, 2 is a press slider that moves up and down, 3 is the upper base of the press machine, and 4 is a hydraulic cylinder for driving, which is attached to the upper base 3. . 4A is a plunger of the hydraulic cylinder 4, 5
is a hydraulic hose piped to the hydraulic cylinder 4,
6 is a pin connecting the plunger 4A and the press slider 2; 7 is the lower base 1 and the upper base 3;
8 is a nut for fixing the support 7, and 9 is the lower base 1.
These are legs that are installed on the floor. Reference numeral 10 designates a punch plate that performs minute dimension movement on the lower surface of the press slider 2, and reference numeral 11 designates a movable punch plate as a movable upper base. Together with the punch plate 10, a plurality of upper bases are constituted. 12 is a fixed die plate as a base fixed to the lower base 1, 13 is a movable die plate as a movable base, and together with the fixed die plate 12, a plurality of bases are configured. ing. 14 is an upper guide rail that guides the movement of the movable punch plate 11 in the horizontal direction; 15 is a lower guide rail that guides the movement of the movable die plate 13 in the horizontal direction;
Reference numeral 6 denotes a punch as an upper die attached to the punch plate 10, to which, for example, a punch for punching holes or for bending only one side is attached. Reference numeral 17 denotes a punch as an upper mold attached to the movable punch plate 11, and for example, a punch for punching holes or bending only one side is attached. These punches 16, 17
are paired together to form a plurality of upper molds.
18 is a punch 16 on the fixed die plate 12.
19 is a die mounted on the movable die plate 13 corresponding to the mold of the punch 17, and these dies 18,
19 form a pair to constitute a plurality of lower molds. 20 is a servo motor for mold positioning that moves the movable punch plate 11 and the movable die plate 13 to determine their positions; 21 is a coupler that connects the output shaft 20A of the servo motor 20 and the spline shaft 22; Teru. 23 is a driving bevel gear fixed to the spline shaft 22 and used to move the die 19; 24A is the bevel gear 23;
A bevel gear 25 is a die shaft that meshes with the bevel gear 24A and two bevel gears 26A. 27A is a bevel gear that meshes with each of the bevel gears 26A, 28 is a bearing nut,
The bearing 29 fitted to the die shaft 25 is fixed. 30 is a housing of the bearing 29;
31 is a bearing, 32 is a housing for the bearing 31, 33 and 34A are gear cases, 35 is a bevel gear for driving that is slidably fitted in the groove of the spline shaft 22 and for moving the punch 17, 36 is a housing, 37 is a bearing, 38
is a punch shaft that fixes bevel gears 24B and 26B. 27B is a bevel gear that meshes with the bevel gear 26B, and 34B and 39 are gear cases. On the lower base 1 side, 40A is the bevel gear 2
A screw shaft 41A is fixed to the screw shaft 7A, and a nut 41A is screwed to the screw shaft 40A and fixed to the movable die plate 13. Rotation of the screw shaft 40A moves the movable die plate 13 horizontally as indicated by the arrow C in FIG. 2a. move in the direction. 42 is the movable die plate 1
A screw shaft 40A is supported via a bearing 29 on the die plate reference stand No. 3. On the press slider 2 side, 40B is a screw shaft fixed to the bevel gear 27B, 41B is a nut, and the screw shaft 40 is fixed to the bevel gear 27B.
The movable punch plate 11 is screwed onto B.
The movable punch plate 11 is moved in the direction of arrow D by rotation of the screw shaft 40B. 43
is the punch plate reference base of the movable punch plate 11, which is connected to the screw shaft 40B via the bearing 29.
is pivoted. Further, W is a processed product.

In this embodiment, the movable punch plate 11 and the movable die plate 13 are connected to corresponding bevel gears 23 and 3 so that they can move simultaneously and at the same speed in proportion to the rotation of the servo motor 20.
5, 24A and 24B, 26A and 26B, 27A and 27B have the same number of teeth, and the thread pitch and direction of the die shaft 25, punch shaft 38, and screw shafts 40A and 40B are the same, respectively. .
51 is a punch fine adjustment reference base for the punch plate 10 and the movable punch plate 11; 52 is a screw shaft that moves the punch plate 10 by minute dimensions depending on the thickness or material of the workpiece W; It is pivotally supported by a punch fine adjustment reference stand 51. 53 nut, screw shaft 5
2 and is fixed to the punch plate 10, and as the screw shaft 52 rotates, the punch plate 10 is guided by the upper guide rail 14 and moves. 54 is a cutlet placket, 55 is a spline shaft,
It is connected to the screw shaft 52 via a coupler 54. Reference numeral 56 denotes a screw shaft 5 for moving the punch plate 10 and the movable punch plate 11 by minute dimensions.
2, and is connected via a coupler 57 to a servo motor 58 for fine movement of the punch, which is driven separately from the servo motor 20. Further, the drive shaft 56 is disposed in the housing 30 via a bearing nut 28 and a bearing 29, fixes a bevel gear 26D, and meshes with a bevel gear 27D fixed to the screw shaft 52. 59
is a gear case, and 60 is the movable punch plate 1.
A fine adjustment screw 61 is screwed into the fine adjustment screw 60 and fixed to the movable punch plate 11, and is slidably fitted into a groove of the spline shaft 55 to transmit rotation in order to move the position 1 by a minute dimension. Natsuto,
62 is a punch fine adjustment base to which the fine adjustment screw 60 and nut 41B are fixed; 63 is a control device for positioning each part of the press machine according to command values; and W is a workpiece.

Next, the operation will be explained.

To position the die 19 and punch 17,
First, when a positioning command is input to the servo motor 20 from the control device 63, the servo motor 20 rotates, the spline shaft 22 rotates, and the bevel gears 24 and 24 rotate by rotating the bevel gears 23 and 35.
The die shaft 25 and punch shaft 3 are connected through A and 24B.
8 rotates, and bevel gears 26A, 26B,
When the screw shafts 40A and 40B rotate through the screw shafts 27A and 27B, the nuts 41A and 41B move in the direction of arrow C, and the movable die plate 13 and movable punch plate 11 are guided by the lower guide rail 15 and the upper guide rail 14. The die 19 and punch 17 move simultaneously by the same distance. And die 19
When the punch 17 reaches the desired position, the servo motor 20 stops, and the die 19 and punch 17 are stopped and positioned at the desired position. Next, when a command value for fine punch positioning is input from the control device 63 to the servo motor 58 for fine punch adjustment, the servo motor 58 starts rotating and rotates the drive shaft 56 for fine punch adjustment and the bevel gear 26D. By doing so, the bevel gear 27D rotates and the screw shaft 52 rotates.

As the screw shaft 52 rotates, the nut 53 screwed thereon moves in the left-right direction, and the punch plate 10 is guided by the upper guide rail 14 and moves. On the other hand, the rotation of the screw shaft 52 causes the spline shaft 55 to rotate via the coupler 54, thereby rotating the fine adjustment screw 60 fitted to the spline shaft 55. Since the position of the fine adjustment screw 60 is integrated with the punch fine adjustment base 62, the rotation of the fine adjustment screw 60 further moves the movable punch plate 11 by a minute dimension from the position positioned by the servo motor 20 for mold positioning. be exposed.

In this way, it is possible to automatically position the punch 16 with respect to the die 18 and the punch 17 with respect to the die 19 at a position that has been moved by a minute dimension.

Next, the workpiece W is transported, and each die 18
and 19 are positioned at positions corresponding to the respective punches 16 and 17.

Next, a signal to lower the press slider 2 is sent from the control device 63, and when the plunger 4A is lowered by driving the hydraulic cylinder 4, the press slider 2 is lowered via the pin 6, and the punches 16 and 17 are applied to the workpiece W. After the contact, the press slider 2 further descends, and the workpiece W is subjected to drilling or bending. At this time, the bevel gear 35 on the press slider 2 side descends while sliding in the groove of the spline shaft 22 as the press slider 2 descends.
After a predetermined hole or bending process is performed on the workpiece W, the press slider 2 reaches the bottom dead center, then starts to rise, and stops at the top dead center at the uppermost position.

Next, if the bending width of the workpiece W or the plate thickness or material of the workpiece W is changed, the servo motor 20 is rotated by a positioning command signal from the control device 63 to move the die 19 and punches 16 and 17. In addition, the servo motor 58 is rotated in response to a punch minute positioning command to move the punches 16 and 17 by a minute dimension to make necessary adjustments, and then the bending process is performed in the same manner as described above.

In the above embodiment, the die 19 and the punch 17 are positioned simultaneously by one driving source, but the present invention is not limited to this, and the die 19 and the punch 17 are positioned by a control device 6.
Positioning command signals from 3 may be sent to drive sources that move separately, and positioning may be performed by separate drives.

Further, by removing the spline shaft 55 from the coupler 54 and the fine adjustment screw 60, only the punch plate 10 can be slightly moved.

In this way, the die 19 and the punches 16 and 17 are controlled by positioning commands from the control device 63.
The movement of the punches 16, 17, the minute dimension movement of the punches 16, 17 according to the minute dimension positioning command, the positioning of the workpiece W, and the lowering and raising of the press slider 2 are performed in a series of operations, so the processing It has become possible to simultaneously bend two parts of the object W, to automatically and freely change the bending width of the workpiece, and to automatically and freely change the dimensional correction when the plate thickness and material are different.

As another embodiment, as shown in FIG. 4a, the movable die plate is used for thin bending of the workpiece W, and the distance between the fixed die plate 12 and the movable die plate 13 is adjusted as shown by the horizontal arrow A. 13 (of course, the punch 17 side is also moved by the same distance), set the desired dimensions, and as shown in FIG. It is also possible to bend many thin objects at once using the bending method. Furthermore, as shown in FIG. 5a, the distance between the fixed die plate 12 and the movable die plate 13 is set to a desired dimension for use in bending a thick workpiece W, and as shown in FIG. 5b, Alternatively, a plurality of lower and upper molds may be used to bend many thick objects at once.

In addition, in FIG. 4a and FIG. 5a, b is an arrow for moving by minute dimension.

As explained above, the present invention comprises a pair of upper and lower molds provided facing each other in a press machine, each configured into a plurality of molds, and a lower mold formed into the plurality of molds. The lower mold of one or more pairs of molds corresponding to each of the upper mold and the upper mold is fixed to the base part, and both the other lower mold and the upper mold forming a pair with this upper mold are fixed. a first power source connected to the interlocking mechanism to automatically position the movable upper and lower molds to desired positions; A micro-movement mechanism is provided to move the upper mold corresponding to the fixed lower mold by a further micro-dimension in the horizontal direction, and is connected to this micro-movement mechanism to move the micro-moveable upper and lower molds to desired positions. A power source for automatically positioning the upper mold and another movable upper mold are provided with a moving mechanism that simultaneously moves the micro-moveable upper mold and other movable upper molds to any desired position. A second power source that automatically positions the movable upper mold and lower mold to desired positions, and control that gives positioning commands to the first power source, the power source, and the second power source. By providing this device, the following effects are achieved.

The position of the mold relative to the flat workpiece can be set based on the position of the fixed lower mold. Moreover, the mutual relationship between the lower molds is consistent during movement, and the same amount is always delivered quickly.
In addition, it has become possible to supply press machines that can accurately position and process workpieces of various sizes accurately and at high speed. This makes it possible to accurately and quickly process products with the same end shape but different lengths, or products with different hole pitches, plate thicknesses, and materials, while automatically changing the bending width. Moreover, even if the thickness or material of the workpiece changes, the correction can be automatically performed. Therefore, there is no need to replace the upper mold and the lower mold each time, and the entire machining process can be automated, which has the advantage of shortening machining time and reducing costs.

[Brief explanation of the drawing]

1A and 1B are a front view and a side view showing an embodiment of the present invention, and FIGS. 2A and 2B are a side view showing an enlarged main part of FIG. 1B, and A of FIG. 2A. Arrow view, 3rd
The figure is an enlarged plan view taken along line B-B in Figure 1, and Figures 4a and b are Figure 1b when used for bending thin materials.
5A and 5B are side views showing enlarged main parts of FIG. 1B before and after processing. It is. In the figure, 1 is the lower base, 2 is the press slider, 3
is the lower base, 4 is the hydraulic cylinder, 4A is the plunger, 5 is the hydraulic hose, 6 is the pin, 7 is the support, 8 is the nut, 9 is the leg, 10 is the punch plate, 11 is the movable punch plate, 12 is the fixed die. plate,
13 is a movable die plate, 14 is an upper guide rail, 15 is a lower guide rail, 16 and 17 are punches, 18 and 19 are dies, 20 is a servo motor, 2
0A is the output shaft, 21 is the coupler, 2 is the spline shaft, 23, 24A, 24B, 26A, 26B, 2
6D, 27A, 27B, 27D, 35 are bevel gears, 25 is a die shaft, 28 is a bearing nut,
29, 31, 37 are bearings, 30, 32, 3
6 is a housing, 33, 34A, 34B, 39 is a gear case, 38 is a punch shaft, 40A, 40B
is a screw shaft, 41A and 41B are nuts, 42 is a die plate reference base, 43 is a punch plate reference base,
51 is a punch fine adjustment reference base, 52 is a screw shaft, 53 is a nut, 54 and 57 are couplers, 55 is a spline shaft, 56 is a drive shaft, 58 is a servo motor, 59
is a gear case, 60 is a fine adjustment screw, 61 is a fine adjustment nut, 62 is a punch fine adjustment base, 63 is a control device, W
is a processed product.

Claims (1)

[Claims] 1. A lower mold is provided on a base part, an upper mold is provided on an upper base that faces the base part and moves up and down while maintaining parallelism, and a space between the lower mold and the upper mold is provided. In a press machine that processes the flat workpiece by placing the workpiece in the shape of a flat plate and lowering the upper mold by moving the upper base; Both are configured into a plurality of molds, and a lower mold of a pair or more of molds corresponding to each of a lower mold and an upper mold configured in the plurality of molds is fixed to the base portion. The upper mold corresponding to the fixed lower mold is allowed to move slightly in the horizontal direction of the upper base, and the other pair or more of the upper mold and the lower mold are attached to the upper mold and the base. The upper mold and the lower mold of the movable pair are connected by an interlocking mechanism that allows them to move in the horizontal direction at the same time, and are connected to the interlocking mechanism and driven by a command from a control device. The mold is automatically positioned at a desired arbitrary position, the finely movable upper mold and the movable upper mold are connected by a connecting mechanism, and the upper mold is connected to the connecting mechanism. A press machine, characterized in that the finely movable upper die and the movable upper die are automatically positioned to any desired position at the same time by a second power source driven by a command from a control device. .