WO2023138277A1 - Combined conjoined reverse buckling forging die for forging large crank throw - Google Patents

Abstract

The present application relates to a combined conjoined reverse buckling forging die for forging a large crank throw. An anvil replacing die and a bending die are adjacently arranged on the same die body, wherein an inner shape of the anvil replacing die is the same as an upper portion of a forge member; and the bending die is a splayed opening die, a splayed inner side wall is a cambered surface to be reversely buckled on the forge member, and the contact positions between the cambered surface and the forge member are an initial pressing line and an end pressing line. By means of the combined conjoined reverse buckling forging die in the present application, different forging processes can be carried out on the forge member only by changing the position of the die body, and the time for replacing an anvil die is saved on, so that the forge member completes multiple forging work steps in the same heating number. The present application is scientific and rational in terms of design, and at least has the advantages of being high in terms of efficiency, capable of saving on die materials, capable of saving on energy, etc.

Description

A Combined Conjoined Reversible Forging Die for Forging Large Crank Throws

Cross References to Related Applications

This application claims the priority of a Chinese patent application with application number 2022201531559 and titled "A Combined Siamese Forging Die for Forging Large-Scale Cranks" submitted to the State Intellectual Property Office of China on January 20, 2022, the entire contents of which are incorporated in this application by reference.

technical field

The present application relates to a combined reverse buckle forging die, in particular to a combined forging die with reverse buckle above a forging, which belongs to the technical field of mechanical manufacturing.

Background technique

The bellcrank is the main part to transform the movement form. Because of its large and complex force, it must have sufficient rigidity, strength and ability to withstand impact loads. In order to meet the above performance requirements, forged bellcranks are usually used. Forging crankshafts generally requires processes such as jaw pressing, upsetting, billet drawing, grooving, bending, and shape finishing. Different processes require different anvil molds. In the traditional large-scale forging crankshaft process, the anvil molds are mostly set alone, and the anvil molds are set and combined unreasonably. Therefore, the number of anvil molds is large and takes up a lot of space. The process of replacing anvil molds is complicated and takes a long time. , High cost.

Contents of the invention

This application proposes a combined conjoined reverse buckle forging die for forging large crankshafts. Multiple forging dies with different functions are arranged on the same die body, and the forging workpiece is reversely buckled to complete multiple processes without replacing the die body, thereby achieving the purpose of less number of times in the forging process and high production efficiency.

In order to achieve the above purpose, the present application provides a combined conjoined reverse buckle forging die for forging large bell cranks. The combined conjoined reverse buckle forging die may include a mold body and a mold, and is characterized in that:

The model can include: a replacement anvil die and a bending die;

The replacement anvil die and the bending die can be arranged on the same mold body, and the die mouth of the replacement anvil die and the die mouth of the bending die are adjacently arranged in the same direction;

The replacement anvil die can be an open die, and its internal shape is the same as the upper part of the forging;

The bending die can be a splayed opening die, and the inner wall of the splayed shape is an arc surface. The opening die can be reversely buckled on the forging. The contact between the arc surface and the forging is the initial crimping line. The arc length of the rolling arc surface may be the bending stroke.

Optionally, there may be multiple molds.

Optionally, a special clamping handle may be provided on the mold body.

Optionally, the bending die can bend the forging into a herringbone shape, and the top angle of the herringbone shape can be set between 90° and 110°.

Optionally, the pressing stroke can be set to be ≤95% of the bending stroke and ≥70% of the bending stroke.

In this application, a plurality of molds with different shapes and different functions are set on the same mold body, and different forging processes can be implemented on the forgings only by changing the position of the mold body, thereby saving the time for changing the anvil mold, so that the forgings can complete multiple forging steps in the same fire. The design of this application is scientific and reasonable, and at least has the advantages of high efficiency, saving mold materials, and saving energy.

Description of drawings

Accompanying drawing 1 is the schematic diagram of the main view structure of the present application;

Accompanying drawing 2 is the state schematic diagram of forging groove for anvil die in accompanying drawing 1;

Accompanying drawing 3 is the state schematic diagram of initial forging forging of bending die in accompanying drawing 1;

Accompanying drawing 4 is the schematic diagram of the state of the forged forging finished by the bending die in the accompanying drawing 1.

In the accompanying drawings, 1 is a mold body, 2 is a manipulator, 3 is a clamping handle, 4 is a trapezoidal mold, 5 is a bottom anvil, 6 is a prefabricated part, 7 is an upper anvil, 8 is a die, 101 is a replacement anvil mold, and 102 is a bending mold.

Detailed ways

Accompanying drawing 1,2,3,4 is an embodiment of the present application.

As shown in accompanying drawing 1, a replacement anvil die 101 and a bending die 102 are adjacently arranged on the die body 1, and the die mouth direction of the replacement anvil die 101 and the bending die 102 is arranged in the same direction, and one end of the die body 1 is provided with a clamping handle 3.

As shown in accompanying drawing 2, the trapezoidal mold 4 is placed on the bottom anvil, the preform 6 is placed on the top of the trapezoidal mold 4, the replacement anvil mold 101 is placed between the preform 6 and the upper anvil 7, the upper anvil 7 presses down, and the trapezoidal mold 4 forges the lower part of the preform 6 into a trapezoidal groove. The original shape remains unchanged.

As shown in accompanying drawing 3, the manipulator 2 clamps the clamping handle 3, and moves the mold body 1 from the position shown in the accompanying drawing 2 to the position shown in the accompanying drawing 3, so that the trapezoidal mold 102 is placed between the preform 6 and the upper anvil 7, and the upper anvil 7 presses down, and the trapezoidal mold 102 squeezes the two arms of the preform 6. Since the inner surface of the trapezoidal mold 102 is set as an arc surface, the arc surface and the arms of the preform 6 are always linearly contacted and squeezed, so that the two arms of the preform 6 are constantly approaching each other, and finally bent into the state shown in Figure 4.

Industrial Applicability

The application relates to a combined conjoined reverse buckle forging die for forging large crank crutches. The replacement anvil die and the bending die are adjacently arranged on the same die body. The inner shape of the replacement anvil die is the same as that of the upper part of the forging. The combined conjoined reverse buckle forging die of the present application can implement different forging processes on the forgings only by changing the position of the die body, which saves the time for replacing the anvil dies, and enables the forgings to complete multiple forging steps in the same fire. The design of this application is scientific and reasonable, and at least has the advantages of high efficiency, saving mold materials, and saving energy.

In addition, it can be understood that the combined conjoined reverse buckle forging die and the like of the present application are reproducible and can be applied in various industrial applications. For example, the combined conjoined reverse buckle forging die of the present application can be applied to the technical field of mechanical manufacturing.

Claims (5)

1. A combined conjoined reverse buckle forging die for forging large crankshafts, including a die body and a die, characterized in that:

   The mold includes: a replacement anvil mold and a bending mold;

   The replacement anvil die and the bending die are arranged on the same mold body, and the die mouth of the replacement anvil die and the die mouth of the bending die are adjacently arranged in the same direction;

   The anvil replacement die is an open die, and the inner shape of the open die is the same as that of the forging top;

   The bending die is a figure-of-sight opening mold, and the inner wall of the figure-of-sight is an arc surface. The opening form is reversely buckled on the forging. The arc length of the rolling arc surface is the bending stroke.
2. A combined conjoined flip forging die for forging large crank throws according to claim 1, characterized in that: there are multiple dies.
3. According to claim 1 or 2, a combined conjoined reverse buckle forging die for forging large crank throws is characterized in that: the die body is provided with a special clamping handle.
4. According to any one of claims 1 to 3, a combined conjoined reverse buckle forging die for forging large crank throws is characterized in that: the bending die bends the forging into a herringbone shape, and the apex angle of the herringbone shape is set between 90° and 110°.
5. According to any one of claims 1 to 4, a combined conjoined reverse buckle forging die for forging large crank throws is characterized in that the pressing stroke is set to be between 70% and 95% of the bending stroke.

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