JPH04134209U - Bending die - Google Patents

Abstract

(57) [Summary] [Purpose] To enable bending to be performed with less pressure without causing scratches such as impressions or scratches on the work being bent. [Configuration] Regarding the bending die that supports the workpiece W on both sides of the bending line L, the parts on each side of the workpiece W are supported on the line for a linear workpiece, and the support surfaces 11 and 21 are supported in a planar manner for a planar workpiece. A bearing 30 is provided on the support molds 10 and 20, and the support surface 11,
21 is set above the rotation axis C1 or below it,
A bending die configured such that proximal ends 12, 22 of support surfaces 11, 21 are gradually separated during bending.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a die for bending various workpieces.

0002

[Conventional technology]

Bending is usually performed using a pair of upper and lower bending dies, and most of them have a bending die surface. The structure is such that the upper mold is lowered relative to the lower mold, but the upper mold lowers the workpiece during processing. Problems that cause impressions or scratches due to being pressed or dragged on the mold. There is a problem.

0003 The above-mentioned scratches such as impressions and scratches cannot be easily removed, and in order to completely remove them, it is necessary to It is necessary to perform post-processing such as grinding. However, if the workpiece has a coating layer In this case, the coating would be damaged and repair would be extremely difficult.

0004 In addition, the effects of the scratches remain on the mold side, which reduces the precision of the mold itself. There was also the problem that it was easy to repair and needed to be repaired at an early stage.

[0005]

[Problem that the idea aims to solve]

This invention was devised in view of the above points, and its problem is bending. There is no damage such as impressions or scratches on the workpiece being bent, and the workpiece can be bent with less pressure. The purpose is to make it possible to carry out deformation processing.

[0006]

[Means to solve the problem]

In order to solve the above problem, the present invention is designed to bend the workpiece W along the bending line. Regarding the bending die supported on both sides, each of the work W is a pair of support molds 10 having support surfaces 11 and 21 arranged in parallel to support the sides; 20, and a bearing 30 for rotatably supporting each support mold 10, 20 around an axis. The supporting surfaces 11 and 21 are on the rotation axis C1 of the supporting molds 10 and 20 or By setting it lower than that, the number of times of support dies 10 and 20 during bending is increased. The proximal ends 12, 22 of the support surfaces 11, 21 are configured to gradually move away from each other due to the movement. This is a technical measure taken.

[0007]

【Example】

This will be explained below with reference to the drawings. The bending die of the embodiment is a workpiece W, that is, a workpiece It is suitable for bending workpieces to 90 degrees or around that angle, and has a base of 40. Bearing members 41 and 42 are attached to both ends, and a pair of supporting molds 10 and 20 are placed between them. is rotatably arranged.

[0008] The support molds 10 and 20 bend the workpiece W while supporting it on both sides of the bending line L. Therefore, the supporting molds 10 and 20 are arranged in parallel on both sides of the bending line L. A support surface with a width that stably supports the workpiece W that extends to the left and right with the bending line L as the border. It has 11 and 21.

[0009] These support surfaces 11 and 21 cover the side surfaces of support molds 10 and 20 made of cylindrical members. When formed by machining, it is composed of a plane parallel to the direction of the cylindrical axis. That is two The support surfaces 11, 21 of can be aligned in the same plane. In other words, a plate-like workpiece as shown in Figure 7 It is possible to make surface contact with the workpiece W7, and it is possible to make line contact with the round bar workpiece W8 as shown in Figure 8. It is formed on a surface that looks like this.

0010 The supporting molds 10 and 20 are arranged in the direction of the bending line L (which is also the same as the cylinder axis direction). The support surfaces 11 and 2 are supported by a bearing 30 so as to be rotatable about parallel axes. 1 is located close to the workpiece W in order to prevent the workpiece W from shifting during bending by the press 50. It is necessary to provide the contact ends 12 and 22 so that they gradually move away from each other (see FIG. 2). supporting surface That the proximal ends 12, 22 of 11, 21 are gradually moved away is shown in FIG. , on the line connecting the rotation axes C1, C1 of the pair of support molds 10, 20, or on the line connecting them. It is only necessary to satisfy the condition that the supporting surfaces 11 and 21 are located below this.

[0011] In the example of FIG. 2, the center C2 of the cylindrical surface of the supporting molds 10, 20 and is coaxial with the rotation axis C1. However, as shown in Figure 4, the center C of the cylindrical surface of the mold 2, by adopting a configuration in which the rotation axis C1 is eccentrically upward, both molds 10 . You can make it as you like.

0012 Next, referring to FIGS. 1, 3, and 4, the die having this eccentric configuration will be explained. I will explain. The pair of supporting molds 10 and 20 are formed into a cylindrical shape, and the center of the cylindrical surface is A rotation axis C1 of the molds 10 and 20 is formed at a position eccentric by a predetermined dimension above C2. The support surfaces 11 and 21 are provided at a height that coincides with this axis C1. child The supporting surfaces 11 and 21 may be lower than the surface corresponding to the rotation axis C1, for example, a cylindrical surface. can be lowered to about the center C2.

[0013] In order to rotate the molds 10 and 20 around the rotation axis C1, both molds 10 and 20 are rotated. A support shaft 31 is formed protruding from the end, and each support shaft 31 is shaped into the bearing members 41 and 42. The shaft hole 32 is rotatably fitted into the shaft hole 32 .

[0014] Bending is performed using the bending die according to the present invention configured as described above. When doing so, for example, a plate is placed on the supporting surfaces 11 and 21 of the supporting molds 10 and 20 that are parallel to each other. Correctly set the shaped workpiece W, and move the press 50 close to the bending line L. Ru. Then, while the rotation axis C1 remains stationary, the center C2 of the cylindrical surface becomes eccentric downward. (FIG. 5), the proximal ends 12, 22 of the support surfaces 11, 21 are pressed by the press 50. As the pressure on the workpiece W progresses, it rotates downward while gradually moving outward and bending. Processing is performed.

[0015] The state shown in FIG. 6 is when the support surfaces 11 and 21 are bent to the point where they intersect at right angles. Between the state shown in FIG. 5 where the workpiece W is supported on the same plane and the state shown in FIG. The amount of movement of 11 and 21 is about the distance of the proximal ends 12 and 22, and Is W7 a surface contact (Fig. 7), and in the case of round bar workpiece W8, is it a line contact in the moving direction? (Fig. 8), almost no scratches occur.

[0016] Note that the support molds 10 and 20 do not have to be cylindrical, and for example, the support surfaces 11 and 2 It may be of a square shape with 1 as the top surface. In that case, the top surface of the square piece is the same as the rotation axis C1. It is necessary to configure it so that it is located at one or more locations.

[0017]

[Effect of the idea]

Since the present invention is constructed and operates as described above, it can be bent. To perform high-quality processing without causing scratches such as impressions or scratches on the workpiece W. It produces the effect that can be achieved. Also, items with hairline processing or coated surfaces. Even if it is a product, there is no risk of damaging its decorative surface or coating, and the mold 10, Since there is almost no damage on the 20 side, molding accuracy can be maintained for a long time and it is highly economical. It has a remarkable effect.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a die according to an example.

FIG. 2 is a diagram illustrating the principle of the die.

FIG. 3 is a side view of the same as above.

FIG. 4 is a partially cutaway front view of the same as above.

FIG. 5 is a cross-sectional explanatory diagram before processing.

FIG. 6 is an explanatory cross-sectional view after processing.

FIG. 7 is a perspective view after processing.

FIG. 8 is a perspective view after processing.

[Explanation of symbols]

10, 20 Support mold 11, 21 Support surface 12, 22 Proximal end 30 Bearing 31 Support shaft 32 Shaft hole 40 Foundation 50 press

Claims (4)

[Scope of utility model registration request] 1. A bending die that supports a workpiece W to be bent on both sides of the bending line, comprising support surfaces 11 arranged in parallel to support each side of the workpiece W on both sides of the bending line; A pair of supporting molds 10 and 2 having 21
0, and a bearing 30 for rotatably supporting each support mold 10, 20 around an axis, and a support surface 11, 21.
is set above or below the rotation axis C1 of the support molds 10 and 20, and the support mold 1 during bending
Proximal end 12 of support surface 11, 21 by rotation of 0, 20,
A bending die characterized in that the number 22 is gradually moved away. 2. The bending mold according to claim 1, wherein the support molds 10 and 20 are made of cylindrical members, and have support surfaces 11 and 21 formed of planes parallel to the axial direction on their side surfaces. Dai. 3. The bearing 30 is rotatably fitted with each support shaft 31 formed to protrude outward from both ends of the support molds 10 and 20 in the direction of the bending line. Shaft hole 32
The bending die according to claim 1, comprising: Claim 4: Center C2 of the cylindrical surface of the support molds 10 and 20
On the other hand, the rotation axis C1 of the support shaft 31 that pivotally supports the support molds 10, 20 is eccentric upward, and the rotation axis C1 is above or below the rotation axis C1, and the rotation axis C1 of the support mold 10, 20 is eccentric. 3. The bending die according to claim 2, wherein support surfaces 11 and 21 are formed above the center C2 of the cylindrical surface.