JPH0330448B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a plate bending machine that bends a plate-shaped workpiece, and more specifically, the present invention relates to a plate-shaped bending machine that bends a plate-shaped workpiece. A plate-shaped bending machine comprising a vertically movable lifting die for upwardly bending an end portion of the plate-shaped work clamped and fixed by the lower die and the upper die. It is. In this type of bending machine, the upper mold is divided into parts so that the length can be freely adjusted. For example, when the thickness of the divided mold is t, the overall length of the upper mold is If the length is not divisible by the thickness t, it is extremely difficult to adjust the length accurately. Therefore, the present invention allows the overall length of the upper die to be easily adapted to various dimensions. FIG. 1 is a diagram illustrating a bending machine 3 for a plate-like workpiece 1 according to the present invention. As shown in the second and third figures, the folding machine 3 of this embodiment has an upper frame 5 driven by a fluid pressure cylinder 7 and guided by a machine frame 9 to move up and down.
The upper mold 11 provided near the lower end of the mold approaches the lower mold 13 and clamps and fixes the plate-shaped workpiece 1, and the elevating mold 15
(see Fig. 3) rises and bends the right side of the plate-shaped work 1 shown in Fig. 2 to form a box. In the above-mentioned bending operation, when first bending the long sides of the planar plate-like work 1 and standing it up, the upper die 11 is longer than the length of the plate-like work 1 in the longitudinal direction. However, if the short sides of the box are made to stand up as illustrated in FIGS. 3 and 4, the length of the bending line is limited. However, the short side dimensions of boxes and the like required in the market vary widely, and the length of the upper mold for bending the short side must be changed frequently. However, in the conventional apparatus, even if the upper mold 11 is configured into divided whole molds, the divided whole molds are divided into five parts, for example.
Since the thickness is usually more than mm, it may be extremely difficult to make the entire length of the upper mold 11 match the set length. The present invention has been made for the purpose of solving the above-mentioned drawbacks of the conventional device, and preferred embodiments thereof will be described in detail below based on the drawings. The left end mold of the upper mold 11 shown in the lower left of FIG. This is a movable end mold 21. The plate-shaped mold shown in the middle right of Figure 4 is the selection type 23.
In this state, all the selection dies 23 are swung to the invalid position. The reference side end type 17 and the regular type 19 consist of a support rotating shaft 25 horizontally provided near the lower end of the upper frame 5 and a clamping device 27 for the upper frame 5 shown in FIG.
The movable side end die 21 is threadedly engaged with a threaded portion 29 provided on a part of the support rotation shaft 25, and the regular use die 19 is crimped between the reference side end die 17. In addition, as is clear from FIG. 4, both end molds 17 and 2
A swing mold 31 is provided at the outer end of the work piece 1, so that even when the rising portions on both sides of the plate-like workpiece 1 are processed into groove shapes, the upper mold 11 can be raised and lowered without interfering with the overhanging portions. It's getting old. FIG. 4 shows the state in which the effective length of the upper die 11 is shortest in the main bending machine 3 because the upper die 11 is constructed by crimping only the regular die 19 between the both end dies 17 and 21. -ing The selection type 23 shown by a solid line in FIG. 3 and the selection type 23 shown by a two-dot chain line are all plate-shaped split types of the same size and shape, and are swingable around a fixed horizontal shaft 33. . In addition, the selection type 23 is equipped with a sector gear 35 that extends approximately 90 degrees around a fixed horizontal shaft 33, as shown by the solid line in FIG.
7, it is oscillated from the vertical solid line state to the substantially horizontal disabled position as shown in the figure. The pinion gear 37 described above is connected to the fixed horizontal shaft 33
It forms part of a pulley part 43 that rotates concentrically with the lead bar 39 on an L-shaped nut member 41 that engages with the lead bar 39 provided horizontally above.
The character-shaped nut member 41 is provided with a pulley 47 that engages with a spline shaft 45, which is the uppermost horizontal shaft, with its shaft perpendicular to the short leg. Thus, when the upper pulley 47 is rotated by the spline shaft 45, the lower pulley 47 is rotated via the non-slip belt 49 such as a timing belt.
3, the pinion gear 37 is rotated together with the selection type 23, and the sector gear 35 is engaged with the selection type 23.
is swaying. Further, the L-shaped nut member 41 is connected to the lead bar 39.
Since it engages with the lead bar 39 and also extends over the spline shaft 45, it is fed to the screw of the lead bar 39 and changes its position to the left and right in FIG. The above-mentioned clamping device 27 is equipped with a piston rod 57 of a fluid pressure cylinder 55, which has a hook portion 53 at its tip that fixes the L-shaped protrusion 51 provided on all the upper molds 11 to the upper frame 5. The protrusion 51 is rotatable around the fixed horizontal shaft 33 without interfering with the hook portion 53 when it is protruded the most. In addition, each plate-like body of the selection type 23 is a movable end type 2.
Since it is provided with a protrusion 59 that restricts rotation in the counterclockwise direction with respect to the rotating shaft 25 that supports the adjacent selection mold 23 on the side of 1 in FIG. Depending on the purpose of use, the pinion gear 37 can be moved to the left or right in FIG. 4 to position it, and the selection type 23 on the right side of the sector gear 35 that engages can be swung integrally to the disabled position. . Next, as shown in FIG. 5, the regular mold 19 is provided with a bullet 61 having an approximate biasing force in a groove 63 between it and the adjacent disc-shaped divided mold. The upper mold 11 is formed by the apparatus according to the embodiment of the present invention described above.
To change the length, first drive the support rotation shaft 25 to move the movable end mold to the right in Fig. 4 to loosen the crimp of the upper mold 11, and move only the movable mold 21 to the other upper mold. Move away from 11. Next, after releasing the clamp device 27, the lead bar 39 is rotated to move the L-shaped nut member 41 left and right to change the position of the pinion gear 37. Sector gear 3 that does not engage with pinion gear 35
Both of the upper molds 11 equipped with the movable end molds 5 swing down by their own weight and are positioned to the left of the movable end mold 21. Next, after activating the clamping device 27, rotate the support rotating shaft 25 with a pulse motor or the like to position the movable end mold 21 close to the reference end mold 17, and replace it with an upper mold of the desired length. was completed. The above description has been made of tool exchange for increasing the length of the upper mold starting from FIG. 4, but the same applies to the case of shortening the length of the upper mold, so the explanation will be omitted. Selection type 23 of the embodiment device of the present invention detailed above
For example, if the thickness of one divided mold is 10 mm and the thickness of the upper mold 19 is also 10 mm, then the distance between adjacent regular molds 19 is the maximum due to the biasing force of the bullet 61 having an approximate biasing force. By selecting the biasing force of the bullet that is maintained at approximately 1 mm in both cases, the length of the final crimped upper die 11 can be determined with high precision that matches the precision of the pulse motor that positions the support rotation shaft 25. This makes it possible to set the length to . In other words, since the 10 regular type 19 are equipped with bullets 61 of approximate biasing force, they can be lined up with an even stepless total gap from zero to 10 mm for one selection type 23. become. As can be understood from the above description of the embodiments, in short, the present invention provides an upper frame 5 having an upper mold 11 for pressing and fixing a plate-like workpiece 1 onto a lower mold 13, which is movable up and down. Mold 13 and upper mold 11
In the plate material bending machine, the upper die 11 is provided with a vertically movable elevating die 15 for upwardly bending the end portion of the plate-shaped workpiece 1 clamped and fixed by the upper die 11. 1, a movable side end mold 21 that is movable in directions approaching and away from this reference side end mold 17, and the reference side end mold 17. A plurality of plate-shaped regular molds 1 arranged between the movable side end mold 21
9, and a plurality of disc-shaped selection molds 23 that can be freely arranged between the regular mold 19 and the movable side end mold 21, and each of the regular molds 19 is slightly spaced from each other. It is provided with an elastic member 61 that acts to separate. As is clear from the above structure, the upper mold 11 in the plate-shaped bending machine according to the present invention includes a reference side end mold 17, a movable side end mold 21, a plurality of disc-shaped regular molds 19, and a plurality of Each of the regular molds 19 is provided with an elastic member 16 that acts to slightly separate the regular molds 19 from each other. Therefore, when setting the entire length of the upper die 11 to an appropriate length, it is possible to approximate the set length by selecting an appropriate number of selection dies 23. If the length cannot be made to match the set length within the thickness of one selection mold 23, the elastic member 61 provided in each regular mold 19
By holding the regular molds 19 in a slightly separated state by the action, the overall length of the upper mold 11 can be made to match the set length. That is, according to the present invention, various settings can be made by selecting a plurality of selection molds 23 to adjust the length of the upper mold 11 and holding each of the regular molds 19 in a state slightly separated from each other. This means that it can be easily accommodated for long periods of time.

[Brief explanation of the drawing]

FIG. 1 is a front view of a bending machine embodying the present invention;
FIG. 2 is a perspective view of a plate-shaped workpiece, FIG. 3 is a sectional view of the apparatus, FIG. 4 is a partial front view of the same, and FIG. (Explanation of symbols representing main parts of drawings), 1...
Plate workpiece, 3...Bending machine, 11...Upper die, 1
7... Reference side end type, 19... Regular use type, 21... Movable side end type, 23... Selection type, 27... Clamping device, 59... Regulating protrusion.

Claims (1)

[Claims] 1. An upper frame 5 equipped with an upper mold 11 for pressing and fixing the plate-shaped work 1 onto a lower mold 13 is provided to be movable up and down, and the plate-shaped work is clamped and fixed by the lower mold 13 and the upper mold 11. In the plate material bending machine, the upper die 11 is provided with an elevating die 15 that bends the end of the plate workpiece 1 upwardly so as to be movable up and down. A side end mold 17, a movable side end mold 21 that is movable toward and away from the reference side end mold 17, and a board disposed between the reference side end mold 17 and the movable end mold 21. A plurality of common types 19 and this common type 19
and a plurality of disc-shaped selection molds 23 that can be freely arranged between the movable side end mold 21 and an elastic member that acts on each of the regular molds 19 to slightly separate the regular molds 19 from each other. 61. A plate material bending machine characterized by comprising: 61.