JPH0648923U - Cam cylinder unit for press die - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cam unit having a cylinder for increasing pressure in a cam structure for converting vertical movement into lateral movement in a die of a press machine. [Composition] The cam slider 11 lowers the upper mold to move the lower cam slider 22 laterally and push the driven cylinder 21 to generate a fluid pressure, and the pressure cylinder 12 fixed to the lower mold. Fluid pressure is transmitted to the above through the connecting hose 23, and the piston of the pressurizing cylinder is operated to perform lateral processing.

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is used by being built in a press die for punching, forming, and cutting a plate material.

It relates to a unit that is built into the press die and that changes the vertical motion of the press machine into lateral motion and increases the pressure.

 (Prior Art) Conventionally, a cam structure using an inclined surface as shown in FIG. 1 has been widely used as a typical example of converting the vertical motion of a press machine into a lateral motion in a press die.

Its structure is as shown in FIG. On the upper mold body 2. Fix the cam driver to the fixed part, 1. 5. The cam slider is the driven part, the contact surface is set at an arbitrary angle, and a guide material such as a slide plate is arranged. Slide plate (L) 9. Slide plate (S) 10. Guided by cam upper plate, 1. The cam slider was moved by the amount of H, and the desired hole was punched, molded, and cut.

(Problems to be solved by the invention) However, in the related art, there are two problems. Cam driver, 1. To keep the balance of force because it uses a mechanical inclined surface with the cam slider. A backup block was needed, and the overall configuration was long.

5. On the inclined surface 3. On slide plate (D) and backup surface. Since the slide plate (B) is attached, wear occurs on each slide plate when the number of movements exceeds 1 million times. Since the position of the tip of the cam slider changes, it is necessary to periodically adjust the clearance of the slide plate.

Furthermore, since the mechanical direction is changed by using the inclined surface, the parts of each part have different dimensions each time due to the change of the tilt angle and the stroke amount, and the machining time of each part becomes enormous. This is a major factor in extending the manufacturing period of molding press dies and increasing costs.

(Means and Actions for Solving Problems) The present invention has been made in view of such conventional problems. Instead of mechanical movement direction conversion using an inclined surface, a pair of fluids The solution is to combine these hydraulic cylinders. That is, a pressurizing cylinder that has a function of interlocking with the relative position with the upper mold and a function of increasing / decreasing the hydraulic pressure. It consists of a pair of driven cylinders that are connected to a cam slider and that are moved by a fluid that is connected from a pressure cylinder to a hose.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows an embodiment of the present invention. The cam slider is 1. It has the same cross section as the cam slider, but the total length can be shortened by about 50%. Part 11. 2 for the cam slider. Through the joint 21. 21. It is connected to the piston rod of the driven cylinder. The driven cylinder is 13. By driven cylinder holding block 7. It is fixed to the lower mold body with tightening bolts. The view on the Z arrow side is the same as the conventional one. 12. The pressure cylinder is fixed at an arbitrary position on the lower mold body. The height of the contact between the tip of the piston rod and the upper die is 11. The height of the cam slider is adjusted to the desired height. The upper die body attached to the ram (not shown) of the press machine begins to descend, and 12. When it comes into contact with the piston rod of the pressurizing cylinder and descends further, 12. 23. Corresponding to the lowering of the piston rod of the pressure cylinder. The fluid flows through the connecting hose 21. It is supplied to the driven cylinder, 21. 11. Connected to the piston rod of the driven cylinder. The cam slider moves forward. When the upper die body reaches the bottom dead center and begins to rise, 11. The cam slider returns to its original position by the return spring, etc., which is provided separately. The fluid returns to the pressurized cylinder, 12. The piston rod of the pressure cylinder also rises and returns to its original position. At this time 12. The movement amount F of the pressure cylinder and 11. If the moving amount of the cam slider is different, 12. Cylinder inner diameter of pressure cylinder and 21. By adjusting the cross-sectional area with the inner diameter of the driven cylinder, it is possible to increase or decrease the pressure.

An example of application of the present embodiment will be described with reference to the drawing shown in FIG. 12. By changing the pressurizing cylinder as shown in Fig. 7, the contents of the cam operation are changed during the lowering of the upper die body instead of a simple forward / backward movement. It is also possible to return the cam slider to its original position. In other words, 61. When the piston drive cam plate a is in contact, 62. The piston rod of the pressure cylinder is 63. It is advancing through the rolling roller, holding the advancing end when it is in contact with the range of part b, and is retracting by the return spring inside the cylinder when it is in contact with part C. d 62. The piston rod of the pressurizing cylinder is holding the retracted end. This example is used when a part as shown in FIG. 8, that is, a cam structure is used to perform punching from the lateral direction and then punching from the top in the same die.

(Effect of the Invention) As described above, by adopting the cam cylinder unit according to the present invention, the following great effects can be obtained as compared with the conventional method.

1) 16. 11. On the slide plate (L). Only the self-weight of the cam slider is loaded, and the W.W. Since no component force is applied in the pressing direction, 16. The amount of wear of the slide plate (L) is reduced by 80%.

2) 11. The length of the cam slider itself can be shortened by the amount of the inclined surface, which can be shortened by about 50%. Furthermore, it existed in FIG. Since no backup block is required, the total length of the cam structure can be shortened by about 65 to 70%.

3) When one application example shown in FIG. 7 is carried out, it is possible to process with one mold, which was conventionally processed with two or more molds.

The above-mentioned effects have great effects not only as individual items but also in die manufacturing such as cost reduction and shortening of delivery time. However, as a further effect, as shown in Fig. 5, a cam structure for processing automobile parts is used. The press die that adopted is cammed from almost the entire circumference. As can be seen from this example, when the cam structure is built in the press die and lateral processing is performed, 52. A large amount of area is required on the outside of the material to be molded.

That is, the shorter the total length of the cam structure, the more effective the cam machining becomes.

Generally, in a press machine, the mounting area (width x length) of the press die is proportional to the processing capacity (number of TONs), so the length of the cam structure is shortened and the die area is reduced. This means that the cost of the press machine used is smaller than that of the die alone, and making it possible to produce is a huge cost advantage.

[Brief description of drawings]

FIG. 1 shows a cross-sectional view of a cam structure for converting vertical movement of a conventional press die for automobile outer plate into lateral movement. 1 ... Cam slider 2 ... Cam driver 3 ... Backup block 4 ... Slide plate ( B) 5 ... slide plate (D) 6 ... slide plate (L) 7 ... lower mold body 8 ... upper mold body H ... cam slider movement amount T ... cam driver movement amount Show the position. FIG. 2 shows a view in the direction Y of FIG. 1, and the same reference numerals as those in FIG. 1 indicate the same parts. Others indicate 9 ... Slide plate (S) 10 ... Cam upper plate. FIG. 3 shows a cross-sectional view and arrangement of a lateral motion functional structure used in a molding press die according to the present invention, 11 ... Cam slider 12 ... Pressure cylinder 13 ... Following cylinder holding block 16 ... Slide plate (L) 17 ... Lower mold body 18 ... Upper mold body 21 ... Followed cylinder 22 ... Joint 23 ... Connection hose E ... Movement amount of cam slider F ... Movement amount of pressurizing cylinder 4 shows a view in the Z direction of FIG. 3, and the same reference numerals as in FIG. 3 indicate the same parts. Others are 19 ... Slide plate (S) 30 ... Cam upper plate. FIG. 5 is a plan view of a lower die of a molding press die having a built-in cam mechanism. 51 ... Guide post 52 ... Material to be molded 53 ... First cam 54 ... Second cam 55 ... Third cam 56 ... Fourth cam 56 ... Shows the arrangement state of the fifth cam. Fig. 6 shows each part of the cam mechanism using the inclination α °,
Shows the balance of forces, α ... Inclination angle P ... Applied pressure Q ... Acting force V ... Inclined surface component force W ... Pressurizing direction component force Q '... Reaction force. FIG. 7 shows the initial state of pressurization of the structural cross section of the pressurizing cylinder part of the application example of the present invention, 71 ... Piston drive cam plate 72 ... Pressurizing cylinder 73 ... Rolling roller 74 ... Pressurizing cylinder holding block 75 ... Upper mold body 76 ... Lower mold body Z ... Pressurizing cylinder movement amount a ... Pressurizing cylinder advance range b ... Pressure end retention range c ... Pressure cylinder retreat range d ... Pressure cylinder retreat retention range FIG. 8 is a schematic view of an object to be molded, which is effective when an application example of the present invention is used. 81 ... Machining hole from lateral direction 82 ... Machining hole from above direction.

Claims (1)

[Scope of utility model registration request] In the cam structure that is built in the press die and converts the vertical movement of the press machine into lateral movement in the press die, one set or multiple sets are connected and arranged with the pressure cylinder and the driven cylinder as a pair. Cam cylinder unit for press die.