JPH03180215A - Bending machine - Google Patents

Abstract

PURPOSE:To easily and accurately execute the required bending with a simple operation by arranging the plural bending dies at the blank transferring surface of the bed and constituting the machine to execute plural bending works by moving the work. CONSTITUTION:The 1st bending die 18 is supported with the plate type ram 4 set in standing on the upper side of the bed 2 and the sliding body 20 moving vertically along the one side of the ram 4 and the bed 2. And on the ram 4, and one or plural 2nd bending dies 14 to bend the blank cooperating with the lower die 11 are set. And the 2nd bending 14 is constituted to rotate between the bending position and the non-operated position in cooperation with the lower die 11. Therefore, because the working force acts vertically, the deflection of ram, etc., is not generated and the accurate working can be executed.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is a folding machine that bends the edges of a blank, and in particular, one machine can perform several processes, and the frame is bent by the force of pressurization. Concerning a compact bending machine that is easy to use.

(Prior art and problems to be solved by the invention) Conventionally, when bending or hemming the edge of a metal plate into a U-shaped or Z-shaped cross section, the edge of a blank cut to a predetermined size is Once the blank is bent into a cross-sectional shape, it is transferred to another machine for the next folding process. When the other edge is to be bent, the blank is rotated in a plane, and the upper die is aligned with the fold width of the other edge to perform the folding process.

For this reason, when shaping the bottom of a product with many bent parts,
− It is not possible to process the edges of the blank with the machine at the base,
It is difficult to work with, and automating the bending process is also a national challenge.

Furthermore, when bending a plate, a springback phenomenon generally occurs, in which the plate deforms slightly but does not conform to the intended shape. The degree of this phenomenon varies depending on the elastic limit, tensile strength, support radius, support angle, etc. of the workpiece. Therefore, in the above-mentioned folding work, the workpiece is bent extra in anticipation of a certain amount of springback depending on the working conditions and the physical properties of the workpiece.

Therefore, when bending the front edge of a blank using a bending die (also called a folding blade or wipe die) that moves in close proximity to the blank holder in a direction substantially perpendicular to the blank holder, this die is used not only in the vertical direction but also in the vertical direction. Perform an overbend process by pushing the blank further toward the blank holder so that it sprouts at an acute angle.

Figure 7.8 shows the bending machines that have been used in the past (for example,
(See Publication No. 47,624).

This bending machine has a C-shaped frame 1 as shown in FIG.
00 with a blank holder 101 and a counter blade 10
2, and a bending die 103 is provided on the back surface thereof. As shown in FIG. 8, this mold 103 is rotated around a fulcrum 106 by hydraulic pressure introduced from the through hole 104 to the back surface of the piston 105, and the blank holder 1
It is designed to be further folded towards the 01 side.

Fine adjustment of the mold 103 is performed using wedges 107 and 108.

However, this bending machine has a complicated structure and requires complicated operations to adjust the bending angle, which is disadvantageous in terms of workability and equipment cost. Although this is done using a large number of drive sources, it is difficult to synchronize these drive sources, and there are also problems in operability. Moreover, a large number of drive sources are provided by wedges 107 and 108 for f1j positioning.
Since the reaction force from the mold 103 is received through the counter blade 102, the rigidity is inferior compared to the case where the counter blade 102, which is a rigid member, is directly fixed, and the bending accuracy is lowered. It is also disadvantageous in terms of accuracy, such as +Il + angle.

Especially since this folding machine has a C-shaped frame,
There is a risk that the frame may be bent during pressure processing, which is disadvantageous in terms of structural accuracy and accuracy, and there is also a risk that the entire device will become larger.

Therefore, the present invention provides a bending machine that can perform several processes with one machine, can easily and accurately perform desired bending with simple operations, and has a compact overall shape. This is the purpose.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a bed whose upper surface serves as a horizontal blank conveying surface, a ram provided to be movable up and down with respect to the bed, and a ram provided to the ram. In a folding machine having a blank holder attached thereto and a folding mold disposed in the vicinity of the blank holder for folding and bevelling the blank, a flat plate erected vertically above the bed. a first folding aid die supported by a sliding body that moves up and down along one side of the ram and the bed; one or more second bending dies, and the second bending dies are configured to be able to rotate between a folding position and a non-beaming position in cooperation with the lower die. This is a bending machine that is characterized by the following.

Further, the first folding die of the present invention is a pair of wipe types, and includes a first drive source that moves the holder in a direction perpendicular to the blank conveyance surface, and a direction parallel to the blank conveyance surface. The bending machine is characterized by having a second drive source for moving the folding machine.

Furthermore, the second driving source of the present invention includes the first folding support type (1
8) is directly held and inserted into the groove of the sliding body, and the mold holder is interposed between the mold holder and the bottom surface of the groove and is always in contact with the rear end of the mold holder. This folding surface bevel processing machine has a tapered plate cam member (27) and an actuator that slides the plate cam member (27) and causes the mold holder to protrude and retreat toward the blank holder side.

The tapered drive member of the present invention is a bending machine in which the taper is formed in multiple stages.

(Function) In the present invention configured in this way, the first folding mold or the second
Not only can a predetermined bending process be performed using each folding die individually, but also a combination of the first folding aid die and the second folding die can be used to perform the folding process. For example, after performing the first bending process using the first folding die while the second folding die is rotated to the non-processing position,
By simply shifting the blank on the blank conveyance plane, the second folding die allows the second processing to be performed, making it possible to perform a plurality of processings with one machine. In this case, the blank only needs to move in a straight line, so
It also becomes possible to automate the bending process.

Furthermore, according to the bending machine according to the present invention, since the ram is installed upright with respect to the bed, when performing pressure processing, all the force acts in the downward direction, resulting in a large amount of damage caused by the so-called moment. Since there is no bending action, the ram etc. do not bend and become rigid, allowing for highly accurate machining. Moreover, since the long tapered temporary cam part is operated using an actuator to machine the tip of the blank, not only is the dimensional accuracy high, but there is no need for multiple drive sources. Since the configuration is simple, it is advantageous in terms of equipment cost, and the entire device is compact.

(Example) Hereinafter, an example of the bending machine of the present invention will be described.

FIG. 1 is a schematic front view showing an embodiment of a bending machine according to the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a view taken along the line ■-■ in FIG. 4 is an enlarged sectional view of the main part of FIG. 3, FIG. 5 is a sectional view taken along the line V-V in FIG. 3, and FIGS. 6 (A), (B), and (C) are FIG. 4 is a diagram illustrating the process of bending.

This bending machine 1 consists of a bed 2 whose upper surface is part of a flat blank conveying surface F formed by a belt feeder V, etc., and a flat plate provided on the bed 2 so as to be movable up and down. The ram 4 and the blank holder 10 attached to the ram 4 are set at -6.

Guide posts 3, 3 are provided at both ends of the bed 2, respectively.
The guide posts 3, 3 support a ram 4 such that it can be raised and lowered, and the ram 4 is supported by the guide posts 3.
It is attached to hold 3. The ram 4 is provided with a guide bush 5 for smooth sliding on the guide posts 3 during elevation.

On both sides of this ram 4 are caps 6 that cover the corners of the ram 4.
A piston rod 8 of a driving cylinder C is screwed into this cap 6. Therefore, by operating the main cylinder C, the ram 4 is moved up and down via the piston rod 8 and the cap 6.

The active cylinder C is supported by a cylinder support member 7, and the lower part of the cylinder support member 7 is connected to the bed 2.
The lower end is fixed to.

An upper holder 9 is directly attached to the lower surface of this ram 4, as shown in FIG. 3.4, and an upper blank holder 10a is provided on the lower surface of this upper holder 9.
A lower blank holder 10b facing 0a is attached to the lower holder 12 on the bed 2. The upper blank holder 10a, lower blank holder 10b, etc. constitute a blank holder 10 that holds a blank W (see FIGS. 6 and 7).

On the blank conveying surface F, a first lower mold 11a and a second lower mold 11b are installed on the lower holder 12 in proximity to the lower blank holder 10b.
are arranged to face a first brake mold 14a and a second brake mold 14b, which are a second bending mold 14 attached to the seventh holder 9 and for bending a long object. These first brake 'U 14a and second brake type 14b are rotatably mounted, and drive brake type cylinders 15a, 15b (see Fig. 1) as necessary to drive rack and pinion mechanisms 16a, 16b. By rotating the shafts 17a and 17b through the lower molds 11a and 11b, it is possible to rotate between the bending position and the unprocessed color margin.

On the other hand, on the back side of the ram 4, a pair of wipe molds 18a and 18b as the first bending mold 18 are provided.

This first bending die 18 moves up and down in a direction perpendicular to the blank conveying surface F, and bends the front edge of the blank W held by the blank holder 10. The wipe dies 18a, 18b are provided above and below the blank conveying surface F as shown in FIG. 3, and the lower one is used for normal westwarding, and the upper one is used for reverse westwarding.

The wipe molds 18a, 18b are held by one mold holder 19.19, which is connected to the slider 20.
It is slidably mounted in a groove 21.21 formed in. A plurality of T-grooves 2 (see FIG. 2) are formed in this sliding body 20, and a bar 23 having a T-shaped cross section attached to the ram 4 and the bed 2 is fitted into the T-grooves 2. , the blank conveying surface F is moved by the cylinder 24 (hereinafter referred to as B cylinder 24) which is the first drive source for auxiliary machining shown in the third country.
It is possible to move in the stacking direction.

Particularly in this embodiment, a drive mechanism 25, which is a second drive source for the bending process, is provided on the rear end surface of the mold holder 19. As shown in FIG. 5, this drive mechanism 25 has a multi-stage taper TIT2T3 that abuts the rear end of one mold holder.
A plate cam member 27 having a cam surface 26 formed with...
have.

The reason why the plate cam member 27 is multi-stage tapered is that
This is because the plate cam member 27 as a whole can be made smaller in size in order to ensure a predetermined amount of movement compared to a plate cam member 27 whose taper changes linearly from the starting end to the terminal end.

The front surface of the cam surface 27a of this plate cam member 27 is in contact with the cam surface 26 on the rear end surface of one of the mold holders, and the back surface 28
is in contact with the bottom surface of the groove portion 21 via two spacers. This contact is effected by the resiliency of a spring 32 provided at the end of the bolt 31 that passes through a long hole 30 formed in the plate cam portion 27. An actuating portion 33 is provided at one end of the plate cam member 27, and this actuating portion 33 includes swing arms 34, 34 connected to both ends of the plate cam member 27, and the rest of each swing arm 34. It consists of cylinders 35, 35 (hereinafter referred to as OB cylinder 35) which are actuators for overbending process attached to the end, and by driving this OB cylinder 35, a swinging arm 34, 34 is formed around a fulcrum 36.
, the plate cam member 27 is slid, and the mold holder 1
9 protrudes from inside 21 of the sliding body 20, and the wipe mold 18
a and 18b. This wipe type 1
The parallelism of 8a and 18b is adjusted by an adjusting screw 37 via a spacer 29.

The actuating section 33 is provided at both ends of the plate cam member 27, and operates one plate cam member 27 by an OB cylinder 35, 35 to perform overbending on the wipe molds 18a, 18b. It is. A similar cylinder 38, 38 is also provided in the operating part of the wipe mold 18b.
is provided.

Next, the effect will be explained.

A case will be described in which pressure is applied to bend the front edge of the blank W inward in three stages as shown in FIG. 6(C), for example.

First, a blank W is conveyed by a belt feeder V or the like on a blank conveying surface F''2 based on the blank dimensions, work procedure, etc. input into the program in advance, and is fed into the blank holder 10. This blank W is positioned by a predetermined positioning means with its front end protruding from the blank holder 10 by a predetermined amount, and the driving cylinder C moves down the ram 4 and is placed between the upper blank holder 10a and the lower blank holder 10b. Hold this in place.

Next, when the B cylinder 24, which is the first driving source, is operated to raise the wipe mold 18b, the front edge protruding from the blank holder 10 is bent (the state shown in FIG. 6(A)).

In this case, in this embodiment, structurally, the ram 4 and the bed 2
does not bend. In other words, the wipe mold 18a has B cylinder 2.
A pressing force of 4 is applied, but this upward force is applied to the blank W.
Since the C-frame is supported by the upright ram 4 and the bed 2 through the C-frame, flexure in the C-frame shown in FIG. 7, so-called jaw opening, does not occur.

Furthermore, when performing the above-mentioned spacing, the wipe die 18b tries to displace in the direction of escaping from the blank holder 10 (horizontal direction in FIG. 3), but this force is supported by the sliding body 20. In other words, since this sliding body 20 slides along the T-bar 23 of the ram 4 and the bed 2, even if a horizontal force is applied in FIG. It does not act as a force to deflect the ram etc.

Therefore, the force generated during the bending process allows the ram 4 or the bed 2 to maintain a constant clearance with the upper die, lower die, and wipe die, allowing normal bending and significantly improving processing accuracy. I will do it.

Next, after the wipe mold 18b rises to a predetermined position and bends the blank W, the OB cylinder 35 is operated according to the program while maintaining this state, and the plate cam portion 2 is bent.
7 is slid within the groove 21 of the sliding body 20. Due to this sliding, the plate cam member 27 projects the mold holder 19 from the sliding body 20, and moves the wipe mold 18b in the horizontal direction, preferably in FIG. 3. As a result, the front edge of the blank W is subjected to an overbending process in anticipation of the amount of springback, and is folded 1111 at a predetermined angle.

In this way, in this embodiment, the wipe mold 18b is operated via one mold holder using the taper of the plate cam part JA27, and the position of this wipe W18b is also adjusted, so that the drive system of the wipe mold 18b is extremely simple. Therefore, the entire device can be made compact, resulting in six advantages in terms of cost.

Furthermore, the B cylinder 24 is operated to wipe the wipe mold 18b.
Once lowered, the blank W is made to protrude by a predetermined length,
The B cylinder 24 is operated again to fold the blank W using the wipe die 18b (the state shown in FIG. 6(B)).

In this case as well, the OB cylinder 35 is operated according to the program while maintaining the position of the wipe mold 18b, the plate cam member 27 is slid within the structure 21 of the sliding body 20, the mold holder 19 is projected from the sliding body 20, The wipe mold 18b is moved in the horizontal direction to apply overbending to the front edge of the blank W.

Similarly, the wipe mold 18b is lowered once to cause the blank W to protrude by a predetermined length, and the B cylinder 24 is operated to wipe the wipe mold 1.
8b (the state shown in FIG. 6(C)). In this case as well, overbending is applied in the same way.

In this case, the upper and lower blank holders 10a.

Since the relief processing is formed on the blank 10b, the portion bent at the first time will not hit the blank holder 10 and be deformed.

The wipe mold can be used to apply pressure to either the left or right 114 parts of the blank W, and can be applied not only to the shape described above but also to various shapes as shown in FIG. 6(D). It can be bent into

Next, the case of bending using a brake type will be explained.

To bend using the brake mold, first drive the brake mold cylinders 15a, 15b, and then bend the brake mold 17a via the rack and pinion mechanisms 16a, 16b.

17b is rotated to set the first brake mold 14a and the second brake mold 14b to the processing position. However, when the brake mold 14a is used, the brake mold 14b is kept rotated to the non-processing position and on standby.

In this state, if the brake mold 14a is lowered, it is possible to perform W-shaped molding such as the bottom surface of the brake mold 14a in FIG. 4, or L-shape molding such as the bottom surface of the brake mold 14b in the same figure. .

Further, the wipe mold and the brake mold can be used together for molding. In other words, by simply moving the blank W in the front-back direction on the bed 2, it is possible to perform a plurality of bending processes that combine wipe bending and brake bending.

When the machining is completed in this manner, the plate cam member 27 is retreated by the OB cylinder 35 to prepare for the next work. In addition, in order to avoid unnecessary movement, it is preferable that the retreat position of the plate cam member 27 is changed as appropriate using a limit switch in accordance with the processing conditions of the blank W, etc.

Further, while remaining in the retreated position, the B cylinder 24 is operated to lower the sliding body 20 as well.

If the bending process is to be performed in the opposite direction to that described above, the upper wipe die 18a in FIG. Omitted.

Note that the bending machine described above is only an example, and various modifications can be made without departing from the gist of the present invention. For example, the drive source for the wipe molds 18a and 18b does not necessarily use the B cylinder 24 or the OB cylinder 35, but may also use a motor or the like, and the number of brake molds 14 is limited to two. Needless to say, the number may be three or more.

(Effects of the Invention) As described above, according to the present invention, a plurality of folding dies can be arranged on the blank conveying surface of a bed, and a plurality of folding processes can be performed simply by moving the blank. The bending process is easy, and the automation of the bending process is also relatively easy.

Further, since the ram is installed upright with respect to the bed and the pressurizing force is applied in the vertical direction, the ram etc. do not bend like opening of the jaws, allowing for highly accurate machining. Moreover, since the tip of the blank is machined by operating a long tapered drive member using an OB cylinder, not only is dimensional accuracy high, but there is no need for multiple drive sources, which reduces equipment costs. This is also advantageous, and the entire device can be made compact. In addition, if various information regarding the blanks that are sequentially flown, such as dimensions, shapes, bending conditions, work procedures, etc., are memorized and controlled by NC or CNC,
Immediately after one bending operation is completed, the mold can be knitted to the desired width and proceed to the next bending process, making it possible to realize efficient multi-weigh, low-volume production.

[Brief explanation of drawings]

FIG. 1 is a schematic front view showing an embodiment of a bending machine according to the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a view taken along the line ■-■ in FIG. 4 is an enlarged sectional view of the main part of FIG. 3, FIG. 5 is a sectional view taken along the line V-V in FIG. 3, and FIGS. 6 (A), (B), and (C) are An explanatory diagram showing the bending process in the order of steps, FIG. 6(D) is an explanatory diagram showing the bending process of another scale, FIG. 7 is an overall perspective view of a conventional bending machine, and FIG. 8 7 is a sectional view showing the main part of FIG. 7. FIG. 1...Bending machine, 2...Bed, 4...
・Ram, 10...Blank holder, 1
1... Lower mold, 14... Second bending mold,
18a, 18b-wipe) Jl (first folded west side type), 19
...Mold holder, 20...Sliding body, 24...
B cylinder (first drive source), 25... drive mechanism (second
Drive source) 27...Plate cam member, 35.38...OB cylinder (actuator), F
...Blank conveyance surface, W...Blank, T...
・Taper.

Claims (1)

[Claims] 1) A bed (2) whose upper surface is a horizontal blank conveyance surface (F), a ram (4) provided to be able to rise and fall freely with respect to this bed (2), and this ram (4). ), and a bending die arranged near the blank holder (10) for bending the blank (W). )
A flat plate-shaped ram (4) vertically installed above, and a first folding member supported by a sliding body (20) that moves up and down along the ram (4) and one side of the bed (2). A mold (18) and
one or more second folding dies (14) provided on the ram (4) and folding the blank (W) in cooperation with the lower die (11); Bending mold (
14) A bending machine characterized in that it is configured to be able to rotate between a bending position and a non-folding position in cooperation with the lower die (11). 2) The first bending mold (18) is a pair of wipe molds, and includes a first driving source (24) for moving the sliding body (20) in a direction perpendicular to the blank conveyance surface (D). ,
The bending machine according to claim 1, further comprising a second drive source (25) for moving the blank in a direction parallel to the blank conveyance surface (F). 3) The second drive source (25) is connected to the first bending mold (1).
8) and directly hold the groove (21) of the sliding body (20).
The mold holder (19) inserted into the mold holder (19) and the mold holder (1
9) and the bottom surface of the groove (21), the tapered plate cam member (27) is always in contact with the rear end of the mold holder (19); 27) and slide the mold holder (19) onto the blank holder (
10) An actuator (35) that protrudes and retreats toward the side.
, 38). The bending machine according to claim 1, comprising: . 4) The bending machine according to claim 3, wherein the tapered plate cam member (27) is tapered in multiple stages.