CN215431363U

CN215431363U - Inlaid seamless roll forging die

Info

Publication number: CN215431363U
Application number: CN202023124801.9U
Authority: CN
Inventors: 杨安学; 李中林
Original assignee: Chengdu Hangxing Machinery Manufacturing Co ltd
Current assignee: Chengdu Hangxing Machinery Manufacturing Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2022-01-07
Anticipated expiration: 2030-12-22

Abstract

The utility model provides an embedded seamless roll forging die which comprises a roll forging die body and a roll shaft, wherein the central angle of the roll forging die body is larger than 180 degrees, and the roll forging die body is of an integrated structure; the edge of the opening side of the roll forging die body is provided with an avoiding notch so that the opening of the roll forging die body is larger than the diameter of the roll shaft and can be installed along the radial direction of the roll forging die body; an embedded module is clamped in the avoiding notch, and the roll forging die body or the roll shaft is provided with a driving key assembly. The utility model not only ensures the quality of the forged shaft piece and thoroughly eliminates seam connection, but also is convenient to disassemble and assemble.

Description

Inlaid seamless roll forging die

Technical Field

The utility model relates to the technical field of forging production processing dies, in particular to an embedded seamless roll forging die.

Background

The roll forging piece of the front axle or the crankshaft of the automobile is generally long in total length, so the wrap angle of a roll forging die needs to exceed 180 degrees to roll the roll forging die, but an integral roll forging die cannot be installed in the radial direction of a roll shaft, the existing roll forging die is shown as the publication number CN204504110U, the roll forging die is divided into two parts of less than 180 degrees to be spliced and fixed on the roll forging die, however, the joint of the roll forging die is still provided with a seam when the roll forging die is installed, so that the joint seam and the like are easy to appear in the forging process, a seam mark is generated on a rolled blank, a workpiece needs to be polished to be eliminated, the workload is large, the practical circumferential angle of the scheme disclosed by CN204504110U is limited, the requirement of the wrap angle of the circumferential angle of most front axles or crankshaft forgings cannot be met, and in addition, if the integral roll forging die is adopted, the method of installing the roll forging die along the end of the roll shaft after local large piece of a machine tool is disassembled, the whole disassembly and assembly process are very tedious and time-consuming, it is extremely inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an embedded seamless roll forging die which is convenient to disassemble and assemble and fundamentally improves the quality level of a forged piece.

The embodiment of the utility model is realized by the following technical scheme: an embedded seamless roll forging die comprises a roll forging die body and a roll shaft, wherein the central angle of the roll forging die body is larger than 180 degrees, and the roll forging die body is of an integrated structure; the edge of the opening side of the roll forging die body is provided with an avoiding notch so that the opening of the roll forging die body is larger than the diameter of the roll shaft and can be installed along the radial direction of the roll forging die body; an embedded module is clamped in the avoiding notch, and the roll forging die body or the roll shaft is provided with a driving key assembly for fixing.

Preferably, the driving key assembly is arranged on the roll shaft, the driving key assembly is respectively abutted and fixed with two ends of the opening side of the roll forging die body, the driving key assembly comprises a force transmission key and screws, and the screws lock the force transmission key into the roll shaft and are arranged on two sides of the roll forging die body, so that the force transmission key is abutted with the end face of the roll forging die body.

Preferably, the driving key assembly further comprises a locking inclined block, the locking inclined block is fixedly connected with the roll shaft through screws, and two sides of the locking inclined block are respectively attached to the force transmission key and the end face of the roll forging die body in an extruding mode.

Preferably, the avoiding notch is arranged around the circumferential direction of the roll forging die body, and contact surfaces on two sides of the embedding module are respectively matched with the avoiding notch and the surface shape of the roll shaft.

Preferably, the central angle of the roll forging die body ranges from 180 degrees to 235 degrees.

Preferably, the root of the avoiding notch is provided with a transition fillet.

Preferably, the roll forging die body is made of high-temperature-resistant die steel.

The technical scheme of the embodiment of the utility model at least has the following advantages and beneficial effects: compared with the prior art, the utility model has reasonable design, ensures that the roll forging die is of an integrated structure and does not generate seam marks on the surface of a forged workpiece, the forged front shaft or other products completely get rid of seam folding, and the forging defect is completely eliminated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a mosaic seamless roll forging die provided in embodiment 1 of the present invention;

fig. 2 is a schematic view of the principle of detaching and attaching the forging die body in embodiment 1 of the present invention.

Icon: the method comprises the following steps of 1-rolling die body, 2-rolling roll shaft, 3-embedding module, 4-avoiding notch, 5-driving key assembly, 51-force transmission key, 52-screw and 53-locking inclined block.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of this application is used, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1-2, the utility model discloses an embedded seamless roll forging die, which comprises a roll forging die body 1 and a roll shaft 2, wherein the central angle of the roll forging die body 1 is larger than 180 degrees, and the roll forging die body 1 is of an integrated structure; the side edge of the opening of the roll forging die body 1 is provided with an avoidance notch 4 so that the opening of the roll forging die body 1 is larger than the diameter of the roll shaft 2 and can be installed along the radial direction; the embedded module 3 is clamped in the avoiding notch 4, the roll forging die body 1 or the roll shaft 2 is provided with the driving key assembly 5, in the existing scheme for solving the problem that the roll forging die body 1 with the perimeter larger than 180 degrees is assembled, the method of dividing the roll forging die body into two parts in a splicing mode is adopted, so that the interface is easy to move, the interface is broken, and foreign matters are embedded into the cross section to separate the two parts in the forging process, further, a joint mark can be formed on the surface of a rolled shaft blank, the roll forging die body is required to be polished and eliminated after forging is completed, so that the workload is increased, the potential safety hazard of fracture and fracture can be buried in the product, in addition, the other scheme is required to disassemble a local large part of a machine tool, the whole roll forging die is assembled from the fracture part of the roll shaft 2, the installation is very inconvenient and time-consuming because the diameters of the roll forging die body 1 and the roll forging die body 1 are equal, and because the central angle of the roll forging die body 1 is larger than 180 degrees, the opening size is increased by arranging the avoiding notch 4 at the opening of the roll forging die body 1, so that the opening is formed Greater than the diameter of roll axle 2, make the diameter of roll axle 2 to put into, this groove depth of dodging notch 4 is about 50mm, and have sufficient thickness in order to guarantee roll forging die body 1, the groove depth should not be too dark, and set up the inclined plane at the entrance of dodging notch 4 and be favorable to the card to go into, furtherly, toward dodging to pack into in notch 4 and inlay module 3 and laminate fixedly once more and through fixed subassembly with roll forging die body 1 and roll axle 2 fully connected fastening, thereby made things convenient for the dismouting problem of roll forging die body 1 of processing overlength axle class forging, fundamentally has guaranteed its forging quality.

The driving key assembly 5 is arranged on the roll shaft 2, the driving key assembly 5 is respectively abutted and fixed with two ends of the opening side of the roll forging die body 1, the driving key assembly 5 comprises a force transmission key 51 and screws 52, the screws 52 lock the force transmission key 51 into the roll shaft 2 and are arranged on two sides of the roll forging die body 1, the force transmission key 51 is abutted with the end face of the roll forging die body 1, and the roll shaft 2 rotates to conduct force through the contact of the force transmission key 51 and the end face of the roll forging die body 1 so as to push the die to rotate and roll.

The driving key assembly 5 further comprises a locking inclined block 53, the locking inclined block 53 is fixedly connected with the roll shaft 2 through a screw 52, two sides of the locking inclined block 53 are respectively attached to the force transmission key 51 and the end face extrusion of the roll forging die body 1, the force transmission key 51 at one end of the roll forging die body 1 is in contact with the embedding module 3 and then transmits force to the die, and the locking inclined block 53 at the other end can be conveniently replaced and adjusted according to the size of a gap between the force transmission key 51 and the end face.

Dodge notch 4 and set up around 1 circumference of roll forging mould body, inlay the both sides contact surface of module 3 and match with the surface shape who dodges notch 4 and roll axle 2 respectively, reduce the clearance between the two, when bearing the powerful radial pressure of rolling, prevent the regional fracture of afterbody of roll forging mould body 1.

The angle range of the central angle of the roll forging die body 1 is 180-235 degrees, the roll forging die body 1 can be conveniently installed in the roll shaft 2 in the range, and the maximum length of the roll forging piece capable of rolling the shaft is effectively ensured.

The root of the avoiding notch 4 is provided with a transition fillet, so that the phenomenon that the die cracks due to stress concentration in quenching and practical use is avoided, and the transition fillet is R15.

The roll forging die body 1 is made of high-temperature-resistant die steel, shafts in the forging process are in a high-temperature red hot state, and therefore the abrasion rate of the roll forging die body 1 in the high-temperature extrusion process is reduced, thermal deformation is prevented, and smooth forming of a rolled workpiece is guaranteed.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an inserted seamless roll forging mould, includes roll forging mould body (1) and roll axle (2), the central angle of roll forging mould body (1) is greater than 180, its characterized in that: the roll forging die body (1) is of an integrated structure;

the edge of the opening side of the roll forging die body (1) is provided with an avoiding notch (4) so that the opening of the roll forging die body (1) is larger than the diameter of the roll shaft (2) and can be installed along the radial direction of the roll forging die body;

dodge to block in notch (4) and have inlayed module (3), roll axle (2) are provided with drive key subassembly (5) for fixing, drive key subassembly (5) respectively with roll forging die body (1) opening side both ends looks butt is fixed.

2. A damascene seamless swaging die according to claim 1, wherein: the driving key assembly (5) comprises a force transmission key (51) and screws (52), wherein the force transmission key (51) is locked into the roll shaft (2) by the screws (52) and arranged on two sides of the roll forging die body (1), so that the force transmission key (51) is abutted to the end face of the roll forging die body (1).

3. A damascene seamless swaging die according to claim 2, wherein: the driving key assembly (5) further comprises a locking inclined block (53), the locking inclined block (53) is fixedly connected with the roll shaft (2) through a screw (52), and two sides of the locking inclined block (53) are respectively attached to the force transmission key (51) and the end face of the roll forging die body (1) in an extruding mode.

4. A damascene seamless swaging die according to claim 1, wherein: dodge notch (4) around roll forging die body (1) circumference sets up, inlay the both sides contact surface of module (3) respectively with dodge notch (4) and the surface shape of roll axle (2) matches.

5. A damascene seamless swaging die according to claim 1, wherein: the angle range of the central angle of the roll forging die body (1) is 180-235 degrees.

6. A damascene seamless swaging die according to claim 1, wherein: the root of the avoiding notch (4) is provided with a transition fillet.

7. A damascene seamless swaging die according to claim 1, wherein: the roll forging die body (1) is made of high-temperature-resistant die steel.