CN111215527A - U-shaped bolt forming die - Google Patents

Abstract

A U-shaped bolt forming die relates to the technical field of mechanical manufacturing and solves the technical problem of reducing manufacturing cost. The die comprises an upper die rod and a lower die component, wherein the end surface of the bottom end of the upper die rod is a convex cambered surface, and the lower die component comprises a base and a left lower die support and a right lower die support which are fixed on the base respectively; the two lower die supports are respectively pivoted with a swing arm capable of pivoting up and down, the pivots of the two swing arms are parallel to each other, the lower ends of the two swing arms are oppositely bent and do not interfere with each other, the top ends of the two swing arms are respectively provided with a roller, and the roller shaft of the roller is parallel to the pivots of the swing arms; the base is fixed with a detachable resilience backing plate which is positioned under the lower end bending parts of the two swing arms and interferes with the pivoting of the lower end bending parts of the two swing arms. The die provided by the invention can be used for processing and manufacturing the U-shaped bolts with various specifications.

Description

U-shaped bolt forming die

Technical Field

The invention relates to a mechanical manufacturing technology, in particular to a technology of a U-shaped bolt forming die.

Background

The U-shaped bolt is manufactured in batches by utilizing a die in a stamping mode, the existing U-shaped bolt forming die mainly comprises an upper die rod and a lower die holder, a workpiece is placed on the lower die holder during stamping, and the workpiece can be stamped and formed by pressing the workpiece into a U-shaped die cavity of the lower die holder by utilizing the upper die rod. Because the U type bolt all is steel material, can slightly kick-back after work piece stamping forming and taking out, consequently the U-shaped die cavity of die holder all leaves the surplus of kick-backing in advance, but among the current U type bolt forming die, the surplus of kick-backing of the U-shaped die cavity of die holder is all fixed, unable adjustment, consequently current U type bolt forming die all can only be used for the manufacturing of single specification U type bolt usually, and this can lead to the increase of enterprise manufacturing cost.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a U-shaped bolt forming die which can be used for processing and manufacturing U-shaped bolts with multiple specifications, thereby reducing the manufacturing cost.

In order to solve the technical problem, the invention provides a U-shaped bolt forming die, which comprises an upper die rod and a lower die assembly, wherein the end surface of the bottom end of the upper die rod is a convex arc surface, and the U-shaped bolt forming die is characterized in that: the lower die assembly comprises a base and a left lower die support and a right lower die support which are fixed on the base respectively;

the two lower die supports are respectively pivoted with a swing arm capable of pivoting up and down, the pivots of the two swing arms are parallel to each other, the lower ends of the two swing arms are oppositely bent and do not interfere with each other, the top ends of the two swing arms are respectively provided with a roller, the roller shaft of the roller is parallel to the pivots of the swing arms, the base is respectively fixed with a left limiting block and a right limiting block for limiting the pivoting of the two swing arms, and the two swing arms are positioned between the two limiting blocks;

the base is fixed with a detachable resilience backing plate which is positioned under the lower end bending parts of the two swing arms and interferes with the pivoting of the lower end bending parts of the two swing arms.

According to the U-shaped bolt forming die provided by the invention, the rebound amount of a workpiece can be adjusted by adjusting the thickness of the rebound backing plate, the manufacturing requirements of U-shaped bolts with various specifications can be met only by replacing the rebound backing plates with different thicknesses, and the manufacturing cost can be reduced.

Drawings

FIG. 1 is a schematic view of a U-bolt forming die according to an embodiment of the present invention before punching a workpiece;

fig. 2 is a schematic view of a U-bolt forming die stamping workpiece according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the following description of the drawings, but the embodiments are not intended to limit the present invention, and all similar structures and similar variations using the present invention shall be included in the scope of the present invention, and the pause numbers in the present invention shall have a relation of the same.

As shown in fig. 1-2, a U-shaped bolt forming die provided in an embodiment of the present invention includes an upper mold rod 1 and a lower mold component, wherein a bottom end surface of the upper mold rod 1 is a convex arc surface, and is characterized in that: the lower die component comprises a base 2 and a left lower die support 3 and a right lower die support 3 which are fixed on the base 2 respectively;

the two lower die supports 3 are respectively pivoted with a swing arm 4 capable of pivoting up and down, the pivots of the two swing arms 4 are parallel to each other, the lower ends of the two swing arms 4 are oppositely bent and do not interfere with each other, the top ends of the two swing arms 4 are respectively provided with a roller 5, the roller shaft of the roller 5 is parallel to the pivots of the swing arms 4, the base 2 is respectively fixed with a limiting block 8 used for limiting the pivoting of the two swing arms at the left and right, and the two swing arms are positioned between the two limiting blocks;

a detachable rebound backing plate 6 is fixed on the base 2, and the rebound backing plate 6 is positioned under the lower end bending parts of the two swing arms 4 and interferes the pivoting of the lower end bending parts of the two swing arms 4.

The embodiment of the invention is suitable for the punch forming operation of the U-shaped bolt, and the working mode is as follows: firstly, a workpiece 7 (a round steel rod section) to be processed is positioned and placed on two rollers at the top ends of two swing arms according to the expansion size (see figure 1), then an upper die rod is lifted to be right above the workpiece, the upper die rod is driven by power equipment to move downwards, the workpiece is stamped by the upper die rod, the workpiece is stamped into a U shape because the end surface of the bottom end of the upper die rod is a convex arc surface, after the workpiece is stamped to touch lower end bent parts of the two swing arms, the two swing arms pivot under the stress along with the continuous downward movement of the upper die rod, so that the upper ends of the two swing arms move inwards in opposite directions, the upper part of the U-shaped workpiece is extruded inwards until the lower end bent parts of the two swing arms are blocked by a rebound cushion plate (see figure 2), then the upper die rod is lifted, the formed workpiece can be taken out, a certain amount of rebound exists after the workpiece is taken out, the rebound amount of the workpiece can be adjusted, and the manufacturing requirements of U-shaped bolts with various specifications can be met only by replacing rebound backing plates with different thicknesses.

Claims (1)

1. The utility model provides a U type bolt forming die, includes die rod, lower module, the bottom end face of going up the die rod is protruding cambered surface, its characterized in that: the lower die assembly comprises a base and a left lower die support and a right lower die support which are fixed on the base respectively;

the two lower die supports are respectively pivoted with a swing arm capable of pivoting up and down, the pivots of the two swing arms are parallel to each other, the lower ends of the two swing arms are oppositely bent and do not interfere with each other, the top ends of the two swing arms are respectively provided with a roller, the roller shaft of the roller is parallel to the pivots of the swing arms, the base is respectively fixed with a left limiting block and a right limiting block for limiting the pivoting of the two swing arms, and the two swing arms are positioned between the two limiting blocks;

the base is fixed with a detachable resilience backing plate which is positioned under the lower end bending parts of the two swing arms and interferes with the pivoting of the lower end bending parts of the two swing arms.

Images