CN204209013U - Two-way reducing die - Google Patents

Abstract

The utility model discloses two-way reducing die, comprise upper bolster, die shoe, upper die and lower die, described upper bolster is located at the top of die shoe and can relatively moves up and down by die shoe, described patrix is fixedly connected on the lower surface of upper bolster, described counterdie is fixedly connected on the upper surface of die shoe, described upper die and lower die is respectively equipped with reducing die cavity.Upper die and lower die arrange reducing die cavity respectively, and one time punching press steel pipe two ends realize reducing simultaneously, improve operating efficiency, and two-way reducing die structure is simple, and cost is low.

Description

Two-way shrinking die

technical field

The utility model relates to the field of punching dies, in particular to a bidirectional shrinking die.

Background technique

At present, the steel pipe necking process is widely used in automobile exhaust systems, and special equipment is generally used for processing, and the work efficiency is low. In order to improve work efficiency and reduce processing costs, a high-efficiency, low-cost steel pipe necking device is required.

Contents of the invention

The problem to be solved by the utility model is to provide a two-way necking die, which can shrink both ends of the steel pipe by one stamping, thereby improving efficiency, simple structure, and low cost.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme: a two-way shrinking die, including an upper mold base, a lower mold base, an upper mold and a lower mold, and the upper mold base is arranged above the lower mold base and can be opposite to the lower mold base. The base moves up and down, the upper mold is fixedly connected to the lower surface of the upper mold base, the lower mold is fixedly connected to the upper surface of the lower mold base, and the upper mold and the lower mold are respectively provided with a shrinking cavity. Shrinking die cavities are respectively set on the upper die and the lower die, and both ends of the steel pipe are simultaneously shrunk at one time, which improves work efficiency. The two-way shrinking die has a simple structure and low cost.

Improved, the two-way shrinking die includes an ejector assembly, the ejector assembly includes an ejector core and a spring, the ejector core is arranged in the shrinkage cavity of the lower die and can move up and down, the upper portion of the ejector core The end surface can abut against the lower end surface of the steel pipe, and the spring is connected between the ejector core and the lower mold seat. After the upper mold seat drives the upper mold to withdraw, the elastic force of the spring drives the ejector core to move up, and then pushes the steel pipe to move upward, so that the steel pipe is withdrawn from the lower mold, which is convenient for taking out the steel pipe.

As an improvement, the upper end surface of the ejector core is provided with a first protrusion protruding upward, the first protrusion can extend into the steel pipe, and the lower end of the steel pipe can be positioned between the lower die and the first protrusion between. The lower end of the steel pipe is positioned between the lower die and the first protrusion, that is to say the lower die and the first protrusion limit the thickness of the lower end of the steel pipe to avoid deformation of the lower end of the steel pipe.

As an improvement, the lower end of the ejector core is provided with a radially outwardly protruding limiting protrusion, and the lower end surface of the lower mold is provided with a limiting chute capable of accommodating the limiting protrusion. The limit protrusion can move up and down in the limit chute. The cooperation of the limit chute and the limit protrusion provides conditions for the up and down movement of the ejector core, while limiting the displacement of the ejector core.

As an improvement, a convex core is provided in the shrinking cavity of the upper mold, and a second protrusion protruding downward is provided on the lower end surface of the convex core, and the lower end surface of the convex core can be connected with the upper end surface of the steel pipe. abutting, the second protrusion can extend into the steel pipe, and the upper end of the steel pipe can be positioned between the upper die and the second protrusion. The arrangement of the convex core and the second protrusion avoids deformation of the upper end of the steel pipe.

As an improvement, the lower mold is provided with a positioning ring for positioning the steel pipe. Strengthen the positioning of the steel pipe to avoid skewing the steel pipe.

As an improvement, a guide post is provided on the lower die base, and the upper die base is slidably connected to the guide post. The guide column acts as a guide to ensure that the upper mold base moves up and down relative to the lower mold base without skewing.

As an improvement, a limiting ring is provided between the upper mold base and the lower mold base. The downstroke distance of the upper mold is limited by the limit ring to prevent the workpiece from being crushed.

As an improvement, a mold handle is provided on the upper mold base. It is convenient to install the two-way shrinking die on the machine tool.

Beneficial effect:

After adopting the above-mentioned technical scheme, the bidirectional shrinking die of the utility model has shrinking cavities respectively set on the upper die and the lower die, and the two ends of the steel pipe can be simultaneously shrunk at one time, which improves the working efficiency. The structure of the bidirectional shrinking die is simple and low cost. Low.

Description of drawings

The specific embodiment of the utility model will be further described below in conjunction with accompanying drawing:

Fig. 1 is the structural diagram of the bidirectional shrinking die of the present utility model;

Fig. 2 is an enlarged view of point A in Fig. 1 .

Detailed ways

As shown in Figure 1 and Figure 2, the two-way shrinking die includes an upper mold base 1, a lower mold base 2, an upper mold 3 and a lower mold 4, the upper mold base is set above the lower mold base, and the lower mold base is provided with an upward Extended guide column 7, the upper mold base is slidably connected to the guide column, and can move along the extension direction of the guide column, and a limit ring 8 is arranged between the upper mold base and the lower mold base, and the limit ring is set on the guide column On the outer wall of the upper mold base, a mold handle 9 is provided, and the mold handle can be positioned on the machine tool to drive the upper mold base to move up and down. The upper mold is fixedly connected to the lower surface of the upper mold base, and the lower mold is fixedly connected to the upper mold base. On the upper surface of the lower mold base, the upper mold and the lower mold are respectively provided with a shrinking cavity 5 . The two-way shrinking die includes a jacking assembly, and the jacking assembly includes a jacking core 41 and a spring 42, the jacking core is arranged in the shrinking cavity of the lower die, and the upper end surface of the jacking core is provided with an upwardly extending spring. The first protrusion 43 protruded, the first protrusion can extend into the steel pipe, the lower end of the ejector core is provided with a radially outwardly protruding position-limiting protrusion 44, and the lower end of the lower die is provided with a There is a limit chute 45 that can accommodate the limit protrusion, and the limit bulge can move up and down in the limit chute, when the steel pipe shrinkage is completed, the lower end surface of the steel pipe and the upper end surface of the ejector core abut and The lower end of the steel pipe is positioned between the lower die and the first protrusion. The spring is connected between the ejector core and the lower die seat. After the upper die seat drives the upper die to withdraw, the elastic force of the spring drives the ejector core to move upward. The steel pipe withdraws from the shrinking die cavity. In order to facilitate the vertical positioning of the steel pipe, the lower mold is provided with a positioning ring 6, and the axial center of the positioning ring coincides with the axial center of the shrinking die cavity. The shrinking die cavity of the upper die is provided with a convex core 31, and the lower end surface of the convex core is provided with a second protrusion 32 protruding downward, and the lower end surface of the convex core can be against the upper end surface of the steel pipe. Then, the second protrusion can extend into the steel pipe, and the upper end of the steel pipe can be positioned between the upper die and the second protrusion.

In addition to the above-mentioned preferred embodiment, the utility model also has other implementation modes, those skilled in the art can make various changes and deformations according to the utility model, as long as they do not depart from the spirit of the utility model, all should belong to the appended rights of the utility model The scope defined by the requirement.

Claims (9)

1. two-way shrinking die, it is characterized in that: comprise upper mold base (1), lower mold base (2), upper mold (3) and lower mold (4), described upper mold base is located at the top of lower mold base and Can move up and down relative to the lower mold base, the upper mold is fixedly connected to the lower surface of the upper mold base, the lower mold is fixedly connected to the upper surface of the lower mold base, and the upper mold and the lower mold are respectively provided with a shrinking cavity (5). 2. The two-way shrinking die according to claim 1, characterized in that: the two-way shrinking die comprises a ejector assembly, and the ejector assembly includes an ejector core (41) and a spring (42), and the ejector core It is arranged in the shrinking cavity of the lower mold and can move up and down. The upper end surface of the ejector core can abut against the lower end surface of the steel pipe, and the spring is connected between the ejector core and the lower mold base. 3. The two-way shrinking die according to claim 2, characterized in that: the upper end surface of the ejector core is provided with a first protrusion (43) protruding upward, and the first protrusion can extend into the steel pipe Inside, the lower end of the steel pipe may be positioned between the lower die and the first protrusion. 4. The two-way shrinking die according to claim 2 or 3, characterized in that: the lower end of the ejector core is provided with a radially outwardly protruding position-limiting projection (44), and the lower die A limit chute (45) capable of accommodating a limit protrusion is provided on the lower end surface, and the limit protrusion can move up and down in the limit chute. 5. according to claim 1 or 2 or 3 described two-way shrinking dies, it is characterized in that: the shrinking cavity of described upper mold is provided with convex core (31), and the lower end face of described convex core is provided with facing The second protrusion (32) protruding from the bottom, the lower end surface of the convex core can abut against the upper end surface of the steel pipe, the second protrusion can extend into the steel pipe, and the upper end of the steel pipe can be positioned on the between the mold and the second bump. 6. The two-way shrinking die according to claim 1, characterized in that: the lower die is provided with a positioning ring (6) for positioning the steel pipe. 7. The two-way shrinking die according to claim 1, characterized in that: the lower die base is provided with a guide post (7), and the upper die base is slidably connected to the guide post. 8. The two-way shrinking die according to claim 1, characterized in that: a limit ring (8) is provided between the upper mold base and the lower mold base. 9. The two-way shrinking die according to claim 1, characterized in that: a die handle (9) is provided on the upper die base.