JPS6324982Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to the structure of an upper hanging cam for a press.

(Prior Art) In the conventional press-type shifting cam structure, a bottom plate 2 is fixed to the upper surface of a fixed lower die (hereinafter referred to as the lower die) 8, as shown in FIG. A guide protrusion 2a is formed on the upper surface of the bottom plate 2,
The protruding strip 2a faces the die 5 attached to the lower die 8 and is inclined at an angle θ with respect to the horizontal plane. On the other hand, the upper hanging cam 3 is attached to the guide bar 21 at the bottom of the upper mold 7.
(See Figures 3 and 4), but the groove 1a of the slide plate 1 attached to the lower part of the upper hanging cam 3 is inclined at an angle θ with respect to the horizontal plane. Therefore, when the upper die 7 descends and the groove 1a fits into the guide protrusion 2a of the bottom plate 2, the upper hanging cam 3 slides against the guide protrusion 2a of the bottom plate 2 in the direction shown in the figure. Move to. Note that 22 is a return spring for the upper hanging cam 3, and 23 is a stopper. A punch 6 with a circular cross section is attached to the left end of the upper hanging cam 3.
is attached, and a pad 4 is attached to the outer peripheral surface of its tip. 9 is a discharge passage for punched scraps, and 10 is a work panel.

FIG. 3 shows a state in which the upper die 7 is at the top dead center of its stroke, the vertical distance between the slide plate 1 and the bottom plate 2 is H, and the inclined guide ridges 2a and grooves of both plates 2 and 1 are shown. The distance D between 1a is
Hcosec θ. H and D are small because the guide protrusions 2a and grooves 1a of both plates 2 and 1 are inclined with respect to the horizontal plane, and are the depth of drawing of the work panel 10 to be press-formed, and the part to be machined with the upper hanging cam. Work panel 10 depending on conditions such as and production method.
When carrying in and carrying out after processing, both plates 1 and 2
may become a hindrance. Also, both plates 1 and 2
The work panel 10 may be deformed due to contact with
It may be damaged.

(Problems to be solved by the invention) This invention provides an upper-hanging cam structure that allows panels of sizes that are difficult to carry in and out with a conventional press die to be easily carried in and carried out without changing the stroke of the upper die from the conventional one. The task is to

(Technical means to solve the problem) In order to solve the above problem, this invention has a sliding surface whose upper surface is inclined with respect to the horizontal plane, a bottom plate whose lower surface is horizontal, and a fixed lower mold. an upper hanging cam that is attached to the lower part of the upper mold that is movable in the vertical direction and has a bottom plate at the lower part so as to be able to slide on the sliding surface of the bottom plate, and is provided between the bottom plate and the lower mold, It consists of a mechanism that positions the bottom plate at the bottom dead center of the stroke of the upper mold and restrains its lateral movement.

(Description of Embodiments) This invention will be explained below based on FIGS. 1, 2, and 5 showing embodiments. FIG. 1 shows the case where the upper die is at the top dead center of the stroke, and FIG. 2 shows the case where the upper die is at the bottom dead center of the stroke. In addition,
Components that are the same as those in FIGS. 3 and 4 are given the same numbers and their explanations will be omitted. A hanger 11 is fixed to the upper hanging cam 3, and a guide 14 parallel to the groove 1a of the slide plate 1 is attached to the hanger 11. 12 is the bottom plate and guide 1
4 is attached to the hanger 11 via a guide groove 13 that is slidably guided. As a result, the bottom plate 12 can move along the groove 1a of the slide plate 1 via its protrusion 12b. That is, it is possible to move in the illustrated direction (direction inclined by θ in the horizontal direction), which is the moving direction of the upper hanging cam 3. The lower surface 12a of the bottom plate 12 is horizontal, and a triangular locking recess 15 is provided in the lower surface 12a. On the other hand, the lower die 8 is provided with a triangular engagement block 16 that can be engaged with the locking recess 15 directly below the locking recess 15 . A backing plate 17 for preventing wear is attached to the lower die 8 around the locking block 16. In FIG. 1, the vertical distance H1 between the lower surface 12a of the bottom plate 12 and the apex 16a of the engagement block 16 is sufficiently larger than H and D in FIG. be.

In the above configuration, when the upper mold 7 is lowered as shown in FIG. Movement in this direction (particularly movement in the left and right directions in FIG. 2) is restricted. When the upper die 7 further descends, the upper hanging cam 3 moves via the slide plate 1 to the bottom plate 12, which is prevented from moving, in the direction shown in the figure, that is, in the direction θ with respect to the horizontal plane, and the pad 4 dices the work panel 10. 5 and then punch a hole in the work panel 10 using a punch 6.
The scrap 18 is discharged from the discharge passage 9. When the upper mold 7 is raised to the top dead center of the stroke, the processed work panel 10 becomes the state shown in FIG. 1, and the lower surface 12a of the bottom plate 12 and the engagement block 1
The processed work panel 10 is carried out from the vertical distance H1 with respect to the vertex 16a of No. 6.

(Effect of the invention) Since this invention has the above-mentioned configuration, the vertical distance H1 between the lower surface 12a of the bottom plate 12 and the apex 16a of the engagement block 16 is the same as that of the slide plate of the conventional press for the same stroke of the upper die 7 as the conventional one. 1 and the bottom plate 2, or the distance D between the concave groove 1a of both plates 1 and 2 and the guide protrusion 2a.
Because it is larger than the conventional press, it can also be used to process larger work panels. Furthermore, the possibility of deformation or damage to the work panel due to contact with the work panel when the work panel is carried into and out of the press is significantly reduced.

In addition, conventionally, for example, products with a depth of 210 mm or more for the inner wheel house of a car were produced using an A-class press (ram stroke 600), but two pieces were made on the left and right.
With this idea, B class press (ram stroke 500)
By using the press, it became possible to take out a single product with a depth of 280 mm, and by downgrading the A-class press to a B-class press, the equipment became smaller and the equipment cost decreased accordingly.

[Brief explanation of the drawing]

Figures 1 and 2 show a front view of an embodiment of this invention, Figure 1 shows the upper mold at the top dead center of the stroke and the work panel is not processed, and Figure 2 shows the upper mold. is at the bottom dead center of the stroke, indicating that the work panel is being machined. FIG. 3 shows a front view of a conventional top hanging cam structure. Figure 4 is A of Figure 3.
-A cross-sectional view is shown. FIG. 5 shows a sectional view taken along the line B--B in FIG. 3... Upper hanging cam, 7... Upper die, 8... Fixed lower die, 12... Bottom plate, {15... Locking recess, 16... Engagement block} Restriction mechanism.

Claims (1)

[Claims for Utility Model Registration] A press mold is provided at the lower part of the upper mold of a press mold, which includes a lower mold on which a work panel is placed, and an upper mold arranged to be movable up and down with respect to the lower mold, and the work panel The upper hanging cam has a processing tool and slides on a surface inclined with respect to the horizontal plane to move toward the work panel, wherein the lower surface of the upper hanging cam has a surface inclined with respect to the horizontal plane. a bottom plate having an inclined surface slidingly in contact with the inclined surface of the slide plate is supported on the upper hanging cam via a hanger so as to move up and down together with the upper die; A locking recess is formed in the lower surface of the bottom plate, and when the upper mold is lowered and the lower surface of the bottom plate reaches the upper surface of the lower mold, the bottom plate is positioned by fitting into the locking recess on the lower surface of the bottom plate. An upper-hanging cam structure characterized by a protruding engagement block that restrains movement in the horizontal direction.