JPS6350040Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a structure for preventing damage to a positioning member provided for positioning a workpiece in a press die, particularly for positioning when assembling or disassembling an upper die to a lower die. The present invention relates to a structure that prevents damage to members for use.

When installing a press mold into a press machine, generally the upper mold and lower mold are combined and then loaded into the press machine, and when the press mold is removed, the upper mold and lower mold are combined. This is done by unlocking these presses while the presses are still in place.

By the way, in the past, when the press die was large, the alignment of the upper die and the lower die when the press die was mounted on the press machine, and the separation of the upper die and the lower die after they were removed from the press machine were difficult. This is done by lifting the upper mold with a crane such as a hoist crane, but when the upper mold is lifted, the upper mold usually swings or rotates at the same time as it swings.
If the lower mold or the punch provided on the lower mold has a positioning member called a gauge for guiding the workpiece to a specified position, the upper mold may collide with the gauge. There is a risk of damaging this.

Therefore, in the past, in order to prevent damage to the gauge, workers constantly checked the distance between the lifted upper die and the gauge while assembling or disassembling the press die. The interval is
It is usually about 5 to 10 mm and quite narrow, so careful work is required to lower the upper mold to the lower mold or lift the upper mold to avoid colliding with the gauge. Because the distance between the two presses is narrow, if the worker were to check this, he or she would have to be close to the lifted upper mold, which is extremely dangerous. The workability was poor.

This idea was made in view of the above circumstances, and the purpose is to provide a structure that prevents damage to the positioning member of the workpiece, which allows press dies to be assembled and disassembled safely and quickly. The feature is that a guide post for matching the upper and lower molds is provided protruding from the lower mold or one of the punch provided on the lower mold and the upper mold,
A fitting hole that fits into the guide post is provided on the other side, and when the upper die is above the upper end of the positioning member for the workpiece, the guide post fits into the fitting hole, and the gap between them is above the upper end. The structure is configured so that the gap is smaller than the gap between the mold and the positioning member, and interference between the upper mold and the positioning member is prevented by regulating the swinging of the upper mold by the guide column and the fitting hole. The point is that I tried to do it.

Embodiments of this invention will be described below with reference to the accompanying drawings. FIG. 1 is a vertical sectional view of the press die according to this invention taken at different positions on the left and right sides, and shows a punch 2 bolted onto the lower die 1, and a pad 4 attached to the upper die 3 at a predetermined side pin. (not shown)
installed by. A positioning member, that is, a gauge 5, for positioning the workpiece W on the punch 2 is provided upright around the punch 2, and a gauge 5 is provided on the lower mold 1 for guiding the upper mold 3. A guide post 6 is erected. On the other hand, a guide post bush 7 is provided as a fitting hole in a position corresponding to the guide post 6 of the upper die 3, and the guide post bush 7 is fitted almost tightly to the guide post 6. The upper die 3 is guided to a proper position relative to the lower die 1 by being slidably fitted with the bush 7.

Furthermore, a guide post 8 having a smaller diameter is erected at the upper end of the guide post 6, and the total height L of these guide posts 6 and guide post 8 is such that the upper end of the guide post 8 is When the upper mold 3 is slightly fitted into the bush 7, all parts of the upper mold 3 are set at a height above the gauge 5. Also, half (D-d)/2 of the dimensional difference between the outer diameter d of the guide post 8 and the inner diameter D of the guide post bush 7, that is, the distance between the outer circumferential surface of the guide post 8 and the inner circumferential surface of the bush 7 is: It is set smaller than the distance α between the gauge 5 and the upper mold 3 when the upper mold 3 is lowered to the lower limit.

Note that the reference numeral 3a in the figure indicates a blade such as a curved blade or a cutting blade provided on the upper mold 3.

FIG. 2 shows a state in which the upper die 3 has begun to be lowered relative to the lower die 1 in order to assemble the press die. In the state shown in FIG. 2, the lowest end of the upper die 3 is above the gauge 5. The bush 7 is slightly fitted into the upper end of the guide column 8. Even if the upper die 3 oscillates as it is lowered from this state, the range of oscillation is limited to the guide column 8 and the bush 7.
The distance between the gauge 5 and the upper die 3 is limited to the range of (D-d)/2, and as mentioned above, this range is smaller than the interval α between the gauge 5 and the upper die 3, so the upper die 3 is unlikely to collide with the gauge 5. Therefore, the upper mold 3 is lowered without damaging the gauge 5 by the upper mold 3,
Eventually, it can be lowered to the state shown in FIG.

The above situation is the same when raising the upper mold 3, and even if the upper mold 3 swings when it is lifted from the lower mold 1, the range will be limited to the collision with the gauge 5 as described above. Therefore, the gauge 5 is not damaged by the upper mold 3.

In addition, in the above embodiment, the guide column 8 was provided at the upper end of the guide post 6, but this invention is not limited to the above embodiment, and the guide column is provided separately from the existing guide post. In addition, a fitting hole for fitting the guide post may be provided separately from the guide post bushing, or, contrary to the above embodiment, a fitting hole for fitting the guide post may be provided in the upper mold and a fitting hole for fitting the guide post bush. The holes may be provided in the lower mold or in a punch placed on the lower mold.

As is clear from the above explanation, according to the damage prevention structure of the workpiece positioning member of this invention,
A guide post for matching the upper die and the lower die is provided protruding from one of the lower die or a punch provided on the lower die and the upper die, and a fitting hole is provided on the other side to fit the guide post. , the guide column fits into the fitting hole when the upper die is above the upper end of the positioning member of the workpiece, and the gap between them is smaller than the gap between the upper die and the positioning member. Therefore, after the guide column and the fitting hole are fitted, the swing range of the lifted upper mold is restricted to a range smaller than the distance between the upper mold and the positioning member,
In addition, this state is maintained until the lowermost end of the upper die rises above the positioning member, so even if the upper die swings when assembling or disassembling the press die, the positioning of the workpiece is still possible. It is possible to prevent the member from being damaged by the upper die. In other words, when the guide support and the fitting hole are fitted into each other, the upper mold is guided so as not to interfere with the positioning member of the workpiece.
When assembling and disassembling the press mold, the positioning member will not be damaged by the upper mold even if the lifted upper mold is not raised or lowered with particular care, and the operator will not be able to touch the upper mold. Since there is no need to approach the press mold, assembly and disassembly of the press mold can be carried out safely and quickly.

[Brief explanation of drawings]

The figure is a schematic cross-sectional view showing an embodiment of this invention. Figure 1 is a cross-sectional view of the upper mold and lower mold assembled together, and Figure 2 is a cross-sectional view of the upper mold suspended above the lower mold. It is a sectional view of the state. 1... lower mold, 2... padded, 3... upper mold, 5...
...Gauge, 7...Guide post bushing, 8...
Guide post, L...height (of the upper end of the guide post),
D...Inner diameter (of guide post bushing), d...
Outer diameter (of the guide column), α... Distance (between the upper mold and the gauge).

Claims (1)

[Scope of utility model registration request] In a press die, which has an upper die, a lower die, and a punch provided on the lower die, and a member for positioning the workpiece is installed upright on the lower die or the punch, there is a gap between the lower die or the punch and the upper die. A fitting hole for mold matching is formed on one side, and a guide post for mold matching that fits into the fitting hole is provided protrudingly on the other side,
The height of the guide column is set to such a length that the upper die is positioned above the positioning member with the upper end of the guide column slightly fitted into the fitting hole, and Workpiece positioning in a press die, characterized in that the gap between the inner circumferential surface of the fitting hole is set to be less than the gap between the upper die and the positioning member when the upper die is lowered to the lower limit. Damage prevention structure for use parts.