CN216632458U

CN216632458U - Die forging near-net forming die for marine low-speed crankshaft and crank throw

Info

Publication number: CN216632458U
Application number: CN202220138170.6U
Authority: CN
Inventors: 白仁伟; 白润达
Original assignee: Liaoning Beixiang Heavy Machinery Manufacturing Co ltd
Current assignee: Liaoning Beixiang Heavy Machinery Manufacturing Co ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-05-31
Anticipated expiration: 2032-01-19

Abstract

Near-net forming die of marine low-speed level bent axle crank throw die forging belongs to mould technical field, concretely relates to near-net forming die of marine low-speed level bent axle crank throw die forging. The utility model provides a marine low-speed-level crankshaft crank throw die forging near-net forming die which is cost-saving and high in production efficiency. The utility model comprises an outer sleeve die, a core flap die, a base pad die, an upper upsetting die, a snake board limiting die and a snake board core die, and is characterized in that: the outer sleeve mold is a rectangular cylinder, the number of the core petal molds is two, the two core petal molds are respectively arranged on two sides of the outer sleeve mold, and the projection of the space between the two core petal molds is the same as that of the outer contour of the workpiece; a bottom cushion die is arranged between the two core petal dies and is provided with a lower arc-shaped groove corresponding to the workpiece connecting shaft; the utility model has reasonable structure, completely limits the metal deformation of the blank, realizes near-net forging, improves the quality, has small machining allowance and reduces the material waste.

Description

Die forging near-net forming die for marine low-speed crankshaft and crank throw

Technical Field

The utility model belongs to the technical field of dies, and particularly relates to a low-speed crankshaft crank throw die forging near-net-shape forming die for a ship.

Background

At present, a low-speed crankshaft for a crankshaft ship is formed by a bending forging method, a snake plate is added on a bending forging die, a blank is subjected to unstable bending forming under the pressure action of a large-scale press, and then the blank is flattened by the press to form a finished product. Due to the fact that the operation difficulty is overlarge, the operation is complex, the size is often difficult to control, the allowance of the forged piece is overlarge, the subsequent processing amount is increased, and waste products are easily produced. Low production efficiency and high raw material cost.

Disclosure of Invention

Aiming at the problems, the utility model provides a marine low-speed crankshaft crank throw die forging near-net forming die which is cost-saving and high in production efficiency.

In order to achieve the purpose, the utility model adopts the following technical scheme, and the utility model comprises an outer sleeve die, a core flap die, a base pad die, an upper upsetting die, a snake board limiting die and a snake board core die, and is characterized in that: the outer sleeve mold is a rectangular cylinder, the number of the core petal molds is two, the two core petal molds are respectively arranged on two sides of the outer sleeve mold, and the projection of the space between the two core petal molds is the same as that of the outer contour of the workpiece; a bottom cushion die is arranged between the two core petal dies and is provided with a lower arc-shaped groove corresponding to the workpiece connecting shaft; the upper upsetting die corresponds to the space between the two core dies; the outer contour of the snake board limiting die is the same as that of the upper upsetting die, an upper groove is formed in the snake board limiting die, and a half-moon-shaped inserting plate is arranged in the upper groove; the shape of the middle gap between the snake board core mould and the workpiece is the same, and the lower end of the snake board core mould is provided with an upper arc-shaped groove corresponding to the lower arc-shaped groove.

As a preferred scheme of the utility model, the snake board core die further comprises a supporting plate, a step groove is formed in the supporting plate, and the snake board limiting die and the upper end of the snake board core die are matched with the step groove.

In another preferred embodiment of the present invention, a mold release slope is provided between the jacket mold and the core mold.

Further, the drawing of patterns inclination is 3 ~ 5.

The utility model has the beneficial effects that: 1. the die has simple structure and can be manufactured in a forging factory.

2. The utility model can complete the forming of the blank in one fire, thereby saving energy.

3. The utility model has reasonable structure, completely limits the metal deformation of the blank, realizes near-net forging, improves the quality, has small machining allowance and reduces the material waste.

4. The outer sleeve can realize the forming of the crank throw with different specifications, and has strong universality.

5. Due to the realization of near-net shape forming, the material cost can be saved by 20-30% compared with that of a bending forging method; the production efficiency is improved by 30 percent compared with the bending forging method.

Drawings

Fig. 1 is a schematic view of the assembled structure of the structural jacket mold, core split mold and base mold of the present invention.

Fig. 2 is a schematic structural view of the upper upsetting die.

Fig. 3 is a structural schematic view of the snake board limiting die.

Fig. 4 is a schematic structural view of the snake board core mold.

Fig. 5 is a schematic view of the structure of the workpiece.

Fig. 6 is a side view of fig. 5.

In the attached drawing, 1 is an outer sleeve die, 2 is a core flap die, 3 is a bottom pad die, 4 is a lower arc-shaped groove, 5 is an upper upsetting die, 6 is a supporting plate, 7 is a snake plate limiting die, 8 is a step groove, 9 is an upper groove, 10 is an inserting plate, 11 is a snake plate core die, and 12 is an upper arc-shaped groove.

Detailed Description

The utility model comprises an outer sleeve die 1, a core valve die 2, a bottom pad die 3, an upper upsetting die 5, a snake board limiting die 7 and a snake board core die 11, and is characterized in that: the outer sleeve die 1 is a rectangular cylinder, the number of the core petal dies 2 is two, the core petal dies are respectively arranged on two sides in the outer sleeve die 1, and the projection of the space between the two core petal dies 2 is the same as that of the outer contour of the workpiece; a bottom cushion die 3 is arranged at the center of the bottom in the outer sleeve die 1 and between the two core split dies 2, and a lower arc-shaped groove 4 corresponding to the workpiece connecting shaft is arranged on the bottom cushion die 3; the upper upsetting die 5 corresponds to the space between the two core split dies 2; the outer contour of the snake board limiting die 7 is the same as that of the upper upsetting die 5, an upper groove 9 is formed in the snake board limiting die 7, and a half-moon-shaped inserting plate 10 is arranged in the upper groove 9; the shape of the middle gap of the snake board core die 11 is the same as that of the middle gap of the workpiece, and the lower end of the snake board core die 11 is provided with an upper arc-shaped groove 12 corresponding to the lower arc-shaped groove 4.

As a preferred scheme of the utility model, the snake board core die further comprises a supporting plate 6, a step groove 8 is formed in the supporting plate 6, and the upper ends of the snake board limiting die 7 and the snake board core die 11 are matched with the step groove 8.

As another preferable mode of the present invention, a mold release slope is provided between the jacket mold 1 and the core segment mold 2.

Further, the drawing of patterns inclination is 3 ~ 5.

The outer cover die 1 can be provided with two half dies which are bound and fixed into a whole through a steel wire.

When in use, the steel ingot is heated, cogging and forged into a square body with a conical side surface.

And combining the outer sleeve die 1, the two core split dies 2 and the bottom cushion die 3 into a die set.

And hoisting the blank into the die cavity of the die set.

The upper upsetting die 5 is lifted above the blank, and the press pressure is applied until the blank fills the die cavity.

And (5) lifting the upper upsetting die 5 out, lifting the snake board limiting die 7 and the snake board core die 11, and applying pressure by a press. The blank is shaped.

And then machining a round hole of the workpiece.

It should be understood that the detailed description and specific examples, while indicating preferred embodiments of the utility model, are given by way of illustration only, not limitation, and it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the utility model; as long as the use requirements are met, the method is within the protection scope of the utility model.

Claims

1. Marine low-speed level crankshaft crank throw die forging near net forming die, including overcoat mould (1), core lamella mould (2), base wad mould (3), go up upsetting die (5), snake board limit mould (7) and snake board mandrel (11), its characterized in that: the outer sleeve die (1) is a rectangular cylinder, the number of the core valve dies (2) is two, the two core valve dies are respectively arranged on two sides in the outer sleeve die (1), and the projection of the space between the two core valve dies (2) is the same as that of the outer contour of the workpiece; a bottom cushion die (3) is arranged at the center of the bottom in the outer sleeve die (1) and between the two core flap dies (2), and a lower arc-shaped groove (4) corresponding to the workpiece connecting shaft is arranged on the bottom cushion die (3); the upper upsetting die (5) corresponds to the space between the two core split dies (2); the outer contour of the snake board limiting die (7) is the same as that of the upper upsetting die (5), an upper groove (9) is formed in the snake board limiting die (7), and a half-moon-shaped inserting plate (10) is arranged in the upper groove (9); the shape of the middle gap of the snake plate core mold (11) is the same as that of the middle gap of the workpiece, and an upper arc-shaped groove (12) corresponding to the lower arc-shaped groove (4) is arranged at the lower end of the snake plate core mold (11).

2. The marine low speed stage crankshaft bell crank die forging near-net shape forming die of claim 1, characterized in that: still include backup pad (6), be provided with ladder groove (8) on backup pad (6), snake board limit mould (7) and snake board mandrel (11) upper end all cooperate with ladder groove (8).

3. The marine low speed stage crankshaft bell crank die forging near net shape forming die of claim 1, characterized in that: and a demoulding inclination is arranged between the outer sleeve mould (1) and the core valve mould (2).

4. The marine low speed stage crankshaft bell crank swaging, near net shape forming die of claim 3, wherein: the demoulding inclination is 3 ~ 5.