CN104209405A - Stretching mould with rib resistance capable of being adjusted - Google Patents

Abstract

The invention relates to a stretching die capable of adjusting the resistance of ribs. The invention provides a stretching die with adjustable rib resistance, comprising an upper die and a lower die, the upper die includes an upper die base, a concave die arranged on the upper die base and a The concave ribs on the seat, the lower die includes the lower die seat, the blank holder arranged on the lower die seat, the flange ribs arranged on the lower die seat and the ribs arranged on the lower die seat The upper punch, the lower mold seat is provided with a rib support rod to control the convex stroke of the flange of the blank holder, the concave rib is matched with the convex rib of the blank holder, the die and the The punches are matched. The beneficial effect of the present invention is: the protruding stroke of the ribs of the blank holder can be controlled by the rib brace, the time for the generation of tensile resistance can be controlled, and the size of the tensile resistance can be controlled by controlling the height of the ribs of the blank holder , so the inflow of materials can be better controlled, and the wrinkling and deformation caused by too fast feeding in the later stage can be reduced.

Description

A Stretching Die with Adjustable Rib Resistance

technical field

The invention relates to a stamping die, in particular to a stretching die in the stamping die which can adjust rib resistance.

Background technique

As shown in Figures 1 and 2, a traditional drawing die includes an upper die and a lower die, the lower die includes a lower die holder 31, a punch 32, a blank holder 33 and a blank holder rib 34, and the upper die includes an upper die holder 41. The convex ribs 42 of the upper mold and the concave mold 43 can be stretched and formed by the convex mold 32 and the concave mold 43. During the stretch forming process, it can be controlled by the concave ribs 34 of the blank holder and the convex ribs 42 of the upper mold The inflow of materials can be well controlled for thin plate parts; but for thick plate parts with side walls such as girders, the tensile resistance cannot be controlled during the stretching process, which will easily cause the side walls to become flared, wrinkled and deformed. There is a big kickback problem.

Contents of the invention

In order to solve the problems in the prior art, the invention provides a stretching die with adjustable rib resistance.

The invention provides a stretching die with adjustable rib resistance, comprising an upper die and a lower die, the upper die includes an upper die base, a concave die arranged on the upper die base and a The concave ribs on the seat, the lower die includes the lower die seat, the blank holder arranged on the lower die seat, the flange ribs arranged on the lower die seat and the ribs arranged on the lower die seat The upper punch, the lower mold seat is provided with a rib support rod to control the convex stroke of the flange of the blank holder, the concave rib is matched with the convex rib of the blank holder, the die and the The punches are matched.

As a further improvement of the present invention, the rib support rod is located under the rib of the blank holder.

As a further improvement of the present invention, the blank holder is provided with a blank holder insert.

As a further improvement of the present invention, the flange of the blank holder is located between the blank holder and the punch.

As a further improvement of the present invention, the bead of the blank holder includes a bead body and a bead mounting block, and the bead body is arranged on the bead mounting block.

As a further improvement of the present invention, the rib support rod is located under the rib mounting block.

As a further improvement of the present invention, there are at least two rib braces.

The beneficial effects of the present invention are: through the above scheme, in the working process, in the initial state, the ribs of the blank holder ring of the lower mold are at the bottom position relative to the blank holder ring, and when the upper mold moves and the lower mold closes, the upper mold and the blank holder The ring moves downward, the punch of the lower mold and the concave mold of the upper mold are gradually formed. During the forming process, the ribs of the blank holder ring begin to contact the rib support rods, and the upper mold and the blank holder ring continue to move downward to form, and the blank holder ring Under the action of the rib support rod, the convex ribs start to protrude relative to the blank holder, and the convex ribs of the blank holder ring and the concave ribs of the upper mold cooperate to produce tensile resistance, and the protrusion of the convex ribs of the blank holder ring can be controlled by the convex rib support rod The stroke can control the time when the tensile resistance is generated, and the height of the ribs of the blank holder can be controlled to control the size of the tensile resistance, so the inflow of materials can be better controlled and the wrinkling caused by too fast feeding in the later stage can be reduced. Deformation phenomenon, at the beginning of stretching, that is, the rib support rod has not touched the rib of the binder ring, and the rib of the binder ring moves synchronously with the binder ring. Therefore, the rib of the binder ring does not work. In the process, it is avoided that the beam parts with side walls form a flared mouth at the side walls due to the tensile resistance, thereby better controlling the springback at the side walls of the beam parts.

Description of drawings

Fig. 1 is the structural representation of lower mold in the prior art;

Fig. 2 is the structural representation of upper mold in the prior art;

Fig. 3 is a schematic structural view of the lower die of a stretching die with adjustable rib resistance of the present invention;

Fig. 4 is a schematic structural view of the ribs of the blankholder ring of a stretching die with adjustable rib resistance of the present invention;

Fig. 5 is a schematic structural view of the lower mold base of a stretching die with adjustable rib resistance in the present invention;

Fig. 6 is a schematic cross-sectional structure diagram of a lower die of a stretching die with adjustable rib resistance according to the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

The reference numerals in Fig. 3 to Fig. 6 are: lower mold base 11; blankholder ring 12; blankholder ring insert 13; blankholder ring rib 14; rib main body 141; rib mounting block 142; punch 15 ; Rib brace 16.

As shown in Figures 3 to 6, a stretching die with adjustable rib resistance includes an upper die and a lower die, and the upper die includes an upper die base, a die set on the upper die base and a set The concave ribs on the upper die base, the lower die includes a lower die base 11, a blank holder 12 arranged on the lower die base 11, and a blank holder 12 arranged on the lower die base 11 Rib 14 and the punch 15 that is arranged on the said lower mold base 11, described lower mold base 11 is provided with the convex rib strut 16 that controls described blankholder ring convex rib 14 protruding travel, described concave rib and The ribs 14 of the blank holder are matched, and the concave die is matched with the male die 15 .

As shown in FIG. 3 to FIG. 6 , the rib support bar 16 is located under the rib 14 of the blank holder.

As shown in FIGS. 3 to 6 , the binder ring 12 is provided with a binder ring insert 13 .

As shown in FIGS. 3 to 6 , the bead 14 of the binder ring is located between the binder ring 12 and the punch 15 .

As shown in FIGS. 3 to 6 , the bead 14 of the blank holder includes a bead body 141 and a bead mounting block 142 , and the bead body 141 is disposed on the bead mounting block 142 .

As shown in FIGS. 3 to 6 , the rib support rod 16 is located under the rib mounting block 142 .

As shown in FIGS. 3 to 6 , there are at least two rib braces 16 .

A kind of drawing die that can adjust rib resistance provided by the present invention, in the working process, in the initial state, the binder ring rib 14 of the lower mold is at the bottom position relative to the binder ring 12, when the upper mold moves and the lower mold After closing, the upper mold, blank holder 12, and blank holder insert 13 move downward, and the punch 15 of the lower mold and the concave mold of the upper mold are gradually formed. During the stretch forming process, the ribs of the blank holder 14 begin to Contacting the rib support rod 16, the upper mold, the blank holder 12, and the blank holder insert 13 continue to move downward to form, and the rib 14 of the blank holder starts to protrude relative to the blank holder 12 under the action of the rib support rod 16. It can be seen that the convex ribs 14 of the blank holder ring cooperate with the concave ribs of the upper die to produce tensile resistance, and the protruding stroke of the convex ribs 14 of the blank holder ring can be controlled through the rib support rod 16, and the time for the generation of tensile resistance can be controlled. Control the height of the ribs 14 of the blank holder to control the size of the tensile resistance, so the inflow of materials can be better controlled, and the wrinkling phenomenon caused by too fast feeding in the later stage can be reduced. At the beginning of stretching, the rib strut 16 has not touched the bead 14 of the binder ring, and the bead 14 of the binder ring moves synchronously with the bead 12. Therefore, the bead 14 of the binder ring does not work, and the side wall is avoided during the forming process. Due to the tensile resistance of the beam parts, the side wall forms a flared mouth, thereby better controlling the springback of the side walls of the beam parts.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (7)

1. the drawing die of a capable of regulating rib resistance, it is characterized in that: comprise upper die and lower die, described patrix comprises upper bolster, be arranged on the die on described upper bolster and be arranged on the concave bar on described upper bolster, described counterdie comprises die shoe, be arranged on the blank holder on described die shoe, be arranged on the blank holder convex tendon on described die shoe and be arranged on the punch on described die shoe, described die shoe is provided with the convex tendon strut of controlling described blank holder convex tendon projection stroke, described concave bar and described blank holder convex tendon match, described die and described punch match.

2. the drawing die of capable of regulating rib resistance according to claim 1, is characterized in that: described convex tendon strut be positioned at described blank holder convex tendon under.

3. the drawing die of capable of regulating rib resistance according to claim 1, is characterized in that: described blank holder is provided with blank holder and inserts.

4. the drawing die of capable of regulating rib resistance according to claim 1, is characterized in that: described blank holder convex tendon is between described blank holder, punch.

5. the drawing die of capable of regulating rib resistance according to claim 1, is characterized in that: described blank holder convex tendon comprises convex tendon body and convex tendon mounting blocks, and described convex tendon body is arranged on described convex tendon mounting blocks.

6. the drawing die of capable of regulating rib resistance according to claim 5, is characterized in that: described convex tendon strut be positioned at described convex tendon mounting blocks under.

7. the drawing die of capable of regulating rib resistance according to claim 1, is characterized in that: described convex tendon strut has two at least.