CN111001744A

CN111001744A - Forging process and forging device for arch bridge pull rod

Info

Publication number: CN111001744A
Application number: CN201911336699.8A
Authority: CN
Inventors: 吕俊; 冯宝倪
Original assignee: Anhui Ruijie Forging Co ltd
Current assignee: Anhui Ruijie Forging Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-04-14

Abstract

The invention discloses a forging process and a forging device of an arch bridge pull rod, wherein the forging process is divided into three forging procedures, and comprises the steps of drawing a long gauge square by using a height-limiting cushion block, carrying out inclined plane forging by using a tapered iron, and forming two-end hexagons by using a hexagonal forming die; according to the invention, the free forging and forming of the arch bridge pull rod forge piece are completed by mounting simple tooling auxiliary tools on the upper chopping board and the lower chopping board, and the forged product has high dimensional precision, high qualification rate, small processing allowance of a client and greatly reduced processing cost due to the simple tooling of the limited high cushion block, the wedge and the hexagonal forming die.

Description

Forging process and forging device for arch bridge pull rod

Technical Field

The invention relates to the technical field of free forging, in particular to a forging process and a forging device for an arch bridge pull rod.

Background

With the gradual updating and development of the free forging industry technology, aiming at a plurality of complex forgings with about hundreds of forgings, if integral die forging is adopted, the die cost is high, and great economic pressure is brought to the required party, therefore, through the free forging equipment, the forming of the complex forgings is completed by using simple auxiliary tools, which becomes the problem to be solved urgently in the free forging industry, the arch bridge pull rod is most common in practical production and application due to the stress characteristic, the arch pull rod has a complex structure, if die forging is adopted, the high cost is inevitably increased according to the difference of the size, therefore, free forging is selected, and the reasonable application auxiliary tools are used for completing the forming of the arch pull rod, which is particularly important.

Disclosure of Invention

The invention mainly aims to provide a forging process and a forging device for an arch bridge pull rod.

In order to achieve the purpose, the invention adopts the technical scheme that: a forging process of an arch bridge pull rod is divided into three forging procedures, and the forging process comprises the following specific forging steps:

material selection preparation: selecting and blanking raw materials, primarily heating in a natural gas heating furnace, preserving heat for 1.2h at the initial forging temperature, and then discharging from the furnace for forging;

drawing a long gauge square: padding the upper anvil surface and the lower anvil surface by using height limiting cushion blocks, and drawing to obtain a blank square;

and (3) inclined plane forging: forging two slopes by using a wedge, and regulating the width;

forming two ends: and forming two hexagonal ends by using a hexagonal forming die, and flattening the forge piece to finish forging.

Preferably, the billet is integrally heated before the inclined plane forging, and the billet is taken out of the furnace and forged after the initial forging temperature is reached.

Preferably, the two ends of the billet are heated before the two ends are formed, and the billet is discharged from the furnace and forged after the initial temperature is reached.

The utility model provides a forging device of arched bridge pull rod, includes chopping block and lower chopping block, go up the side connection power device of going up of chopping block, go up the chopping block and install upper limit high cushion and lower limit high cushion with the side symmetry that lower chopping block is relative, it is located to go up the chopping block install the wedge between the upper limit high cushion, hexagonal moulded die is gone up in the lower surface mounting of going up the chopping block, the last surface mounting of lower chopping block has hexagonal moulded die down, go up hexagonal moulded die and hexagonal moulded die down and correspond the setting.

Preferably, the upper limit high cushion block and the lower limit high cushion block are four and are respectively and symmetrically arranged.

Preferably, the sum of the heights of the upper hexagonal forming die and the lower hexagonal forming die is the same as the sum of the heights of the upper limit high cushion block and the lower limit high cushion block.

Preferably, both sides fixed connection gag lever post of chopping block down, be equipped with spacing slide opening on the last chopping block, the gag lever post passes spacing slide opening and with spacing slide opening sliding connection.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, the free forging and forming of the arch bridge pull rod forge piece are completed by mounting simple tooling auxiliary tools on the upper chopping board and the lower chopping board, and the forged product has high dimensional precision, high qualification rate, small processing allowance of a client and greatly reduced processing cost due to the simple tooling of the limited high cushion block, the wedge and the hexagonal forming die.

Drawings

FIG. 1 is a schematic view of a forging apparatus according to the present invention;

FIG. 2 is a perspective view of the upper cutting board of the present invention;

FIG. 3 is a perspective view of a lower cutting board according to the present invention;

FIG. 4 is a side view of the arch bridge tie bar of the present invention;

fig. 5 is a top view of the arch bridge tie rod of the present invention.

In the figure: 1. an upper chopping board; 2. a cutting board is arranged; 3. a power plant; 4. an upper limit high cushion block; 5. a lower limit high cushion block; 6. a wedge; 7. putting a hexagonal forming die; 8. a lower hexagonal forming die; 9. a limiting rod; 10. and limiting the sliding hole.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Example 1

A forging process of an arch bridge pull rod is divided into three forging procedures, and the forging process comprises the following specific forging steps:

drawing a long gauge square: selecting two height-limiting cushion blocks according to the height or width of the arch bridge pull rod, wherein the sum of the heights of the two height-limiting cushion blocks is equal to the height or width of the arch bridge pull rod, and drawing the raw materials by using the height-limiting cushion blocks to obtain a blank square;

and (3) inclined plane forging: selecting an oblique iron according to the slope gradient and the slope length of the arch bridge pull rod, heating the whole blank to the initial forging temperature again when the temperature of the blank is lower than the initial forging temperature, forging out slopes on two sides by using the oblique iron, and regulating the width by using the height limiting cushion blocks for multiple times;

forming two ends: and selecting hexagonal forming according to the hexagonal shapes at the two ends of the arch bridge pull rod, heating the two ends of the blank to the initial forging temperature again when the temperature of the blank is lower than the initial forging temperature, forging the hexagons by utilizing a hexagonal forming die, flattening the whole surface of the blank, and finally finishing forging.

Example 2

As shown in fig. 1 to 3, a forging device for an arch bridge pull rod comprises an upper chopping board 1 and a lower chopping board 2, wherein the upper side surface of the upper chopping board 1 is connected with a power device 3, the opposite side surfaces of the upper chopping board 1 and the lower chopping board 2 are symmetrically provided with an upper limit high cushion block 4 and a lower limit high cushion block 5, the upper chopping board 1 is positioned between the upper limit high cushion blocks 4 and is provided with an inclined iron 6, the lower surface of the upper chopping board 1 is provided with an upper hexagonal forming die 7, the upper surface of the lower chopping board 2 is provided with a lower hexagonal forming die 8, and the upper hexagonal forming die 7 and the lower hexagonal forming die 8 are arranged correspondingly.

In this embodiment, the upper limit cushion block 4 and the lower limit cushion block 5 are four blocks and are respectively and symmetrically arranged.

In this embodiment, the sum of the heights of the upper hexagonal forming die 7 and the lower hexagonal forming die 8 is the same as the sum of the heights of the upper limit high cushion block 4 and the lower limit high cushion block 5.

In this embodiment, the two sides of the lower chopping board 2 are fixedly connected with limiting rods 9, the upper chopping board 1 is provided with limiting slide holes 10, and the limiting rods 9 penetrate the limiting slide holes 10 and are slidably connected with the limiting slide holes 10.

Example 3

As shown in fig. 4-5, the total length L of the arch bridge tie rod to be forged is 1000mm, the height H of the arch bridge tie rod is 80mm, and the slope ratio of the two sides of the arch bridge tie rod is 1: 10, the slope length L1 of arch bridge pull rod is 400mm, the width D of arch bridge pull rod is 80mm, and the both ends hexagonal of arch bridge pull rod is the hexagon and the distance between the relative limit is D1.

Blanking phi 120 round steel, primarily heating in a natural gas heating furnace, keeping the temperature for 1.2h at the initial forging temperature, discharging and forging, selecting 40mm for the heights of an upper limit high cushion block and a lower limit high cushion block of a forging device of an arch bridge pull rod, placing the phi 120 round steel between the two lower limit high cushion blocks of a lower chopping board and not on the same vertical plane with a wedge, drawing out the phi 120 round steel by using a power device to drive the upper chopping board to obtain a blank square of 80mm, then placing the blank square between the two lower limit high cushion blocks of the lower chopping board and on the same vertical plane with the wedge, driving the upper chopping board by using the power device to perform slope forging on the blank square, and performing regular width on the blank square by using the upper limit high cushion block and the lower limit high cushion block, after the slope forging is completed, performing hexagonal forging on two ends of the blank square by using an upper hexagonal forming die and a lower hexagonal forming die, and leveling the whole surface of the blank square, and finally, forging is completed.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. A forging process of an arch bridge pull rod is characterized in that: the forging process is divided into three forging procedures, and the specific forging steps are as follows:

2. The forging process of the arch bridge pull rod according to claim 1, wherein the forging process comprises the following steps: and integrally heating the blank before the inclined plane forging, and discharging from the furnace for forging after the initial forging temperature is reached.

3. The forging process of the arch bridge pull rod according to claim 1, wherein the forging process comprises the following steps: and heating the two ends of the blank square before forming the two ends, and discharging from the furnace for forging after the temperature of the two ends reaches the initial temperature.

4. A forging apparatus for use with the tension rod of an arch bridge according to any one of claims 1 to 3, comprising an upper anvil and a lower anvil, the upper anvil being connected at its upper side to a power unit, wherein: the upper limit high cushion block and the lower limit high cushion block are symmetrically arranged on the side face, opposite to the lower chopping block, of the upper chopping block, the upper chopping block is located between the upper limit high cushion blocks, an upper hexagonal forming die is arranged on the lower surface of the upper chopping block, a lower hexagonal forming die is arranged on the upper surface of the lower chopping block, and the upper hexagonal forming die and the lower hexagonal forming die are arranged correspondingly.

5. The forging apparatus for arch bridge tie-rod of claim 4, wherein: the upper limit high cushion block and the lower limit high cushion block are four and are respectively and symmetrically arranged.

6. The forging apparatus for arch bridge tie-rod of claim 4, wherein: the sum of the heights of the upper hexagonal forming die and the lower hexagonal forming die is the same as the sum of the heights of the upper limit high cushion block and the lower limit high cushion block.

7. The forging apparatus for arch bridge tie-rod of claim 4, wherein: the chopping board is characterized in that two sides of the lower chopping board are fixedly connected with limiting rods, the upper chopping board is provided with limiting slide holes, and the limiting rods penetrate through the limiting slide holes and are in sliding connection with the limiting slide holes.