CN219282647U

CN219282647U - Joint pre-forging

Info

Publication number: CN219282647U
Application number: CN202223381823.2U
Authority: CN
Inventors: 刘强; 张年; 孙伟
Original assignee: Jiangsu Longcheng Precision Forging Group Co ltd
Current assignee: Jiangsu Longcheng Precision Forging Group Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-06-30
Anticipated expiration: 2032-12-16

Abstract

The utility model relates to the technical field of joint pre-forgings, and discloses a joint pre-forgings and a upsetting blank assembly; the upsetting blank assembly comprises: the upsetting blank body is provided with a first round corner at the top; the second round angle is arranged on the outer side wall of the upsetting blank body; the round angle III is formed in the outer side wall of the upsetting blank body; the method for preparing the joint forging by using the joint pre-forging comprises the steps of adopting the joint pre-forging; the combined forging process is adopted to realize high-quality forming of the fuel pipe joint forging of the engine, the metal streamline of the product is complete and the direction meets the use requirement, the probability of fuel leakage is reduced, the fuel supply stability of a fuel supply system of the engine is improved, the closed type pre-forging forming is realized, the pre-forging forming force is reduced, the service life of a pre-forging die is prolonged, the cost of die manufacturing and forging manufacturing is reduced, the feasibility that the pre-forging closed type pre-forging can form an expected structure is ensured, and the folding defect of a final forging at two end opening parts is avoided.

Description

Joint pre-forging

Technical Field

The utility model relates to the technical field of joint pre-forgings, in particular to a joint pre-forging and a method for preparing a joint forging by adopting the joint pre-forging.

Background

The fuel distributing pipe of the cargo ship engine needs to be connected by adopting a joint, and the joint part is generally formed by forging. The forging materials, shapes, performance requirements and weight are generally obtained by adopting a blanking-upsetting-pre-forging-final forging method.

The structure of the pre-forging is designed to be close to the structure of a final forging according to the principle of equal volume, but the structure of the pre-forging on the market can easily cause one or more problems of poor applicability of raw material specifications, low service life of a die, insufficient filling of the surface of the forging, folding of the surface of the forging, high material loss and the like, the ideal final forging effect is obtained by optimizing the structure of the pre-forging, which is a common technical means in the field, but for the forging with a specific structure, the pre-forging with the structure is designed so that the forming reliability, the service life of the die, the material loss, the applicability of raw material specifications and the like of the forging can be simultaneously met, no general method exists at present, and in addition, the production limit sometimes limits the raw material specifications, so that the difficulty of forging the forging with the expected shape is further increased.

The existing joint pre-forging cannot efficiently and economically prepare the joint forging meeting the expected use requirement, and inconvenience is brought to joint preparation work, so that the utility model is a technical problem to be solved.

Disclosure of Invention

(one) solving the technical problems

Aiming at the defects of the prior art, the utility model provides a joint pre-forging and a method for preparing the joint forging by adopting the joint pre-forging, which have the advantage of high-quality molding and solve the problem that the existing joint pre-forging cannot prepare the joint forging meeting the expected use requirement efficiently and economically.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions: a joint pre-forging piece and a upsetting blank assembly; the upsetting blank assembly comprises: the upsetting blank body is provided with a first round corner at the top; the second round angle is arranged on the outer side wall of the upsetting blank body; and the third round angle is formed in the outer side wall of the upsetting blank body.

A method for preparing a joint forging by using the joint forging comprises the following steps:

s1: blanking, namely cutting a long metal bar for manufacturing the fuel pipe joint of the engine into sections of blanks on a shearing machine or a sawing machine, and storing the blanks in a raw material station for standby;

s2: heating, namely placing the prepared blank into a heating furnace, and heating to a malleable temperature range to obtain a heated blank;

s3: semi-closed upsetting, namely vertically placing the heated material blank into an upsetting die, upsetting through a forging press to obtain an upsetting part of the fuel pipe joint of the engine;

s4: placing the upsetting piece of the fuel pipe joint of the engine into a pre-forging die, and pre-forging by a forging press to obtain a pre-forging piece of the fuel pipe joint of the engine;

s5: placing the engine fuel pipe joint pre-forging piece into a final forging die to perform final forging forming through a forging press to obtain an engine fuel pipe joint final forging piece;

s6: and (3) hot trimming, namely placing the final forging piece of the fuel pipe joint of the engine into a trimming die, and cutting off redundant flash through a forging press to obtain the forging piece of the fuel pipe joint of the engine.

Preferably: and a chamfering step is further included between the S1 and the S2.

Preferably: and (2) cutting the long metal bar in the step (S1) to form a section of blank with the diameter of 50 mm+/-1 mm.

Preferably: the heating temperature of the S2 is 1150-1250 ℃, and the heating time is 5-10S.

Preferably: the S3 semi-closed type pre-forging, the S4 closed type upsetting blank and the S5 open type final forging are completed on a forging and pressing device, and the device is provided with 3 stations.

(III) beneficial effects

Compared with the prior art, the utility model provides the joint pre-forging and the method for preparing the joint forging by adopting the joint pre-forging, which have the following beneficial effects:

the utility model has the advantage of high-quality molding, during processing, the round angle I, the round angle II and the round angle III play a role in preventing folds from being generated at two ends of the upsetting body after finish forging is carried out on the upsetting body, under the condition of limiting raw material specifications, the high-quality molding of the fuel pipe joint forging of the engine is realized by adopting a combined forging process of semi-closed upsetting-open final forging-hot trimming, the metal streamline of the product is complete and the direction meets the use requirement, the probability of fuel leakage is reduced, the fuel supply stability of an engine fuel supply system is improved, the closed type forging forming is realized by the special structure design of the fuel pipe joint forging of the engine, the forging forming force is reduced, the service life of a forging die is further prolonged, the cost of die manufacturing and forging manufacturing is reduced, the feasibility of the expected structure can be formed by the pre-forging closed type forging is ensured by the special structure design of the fuel pipe joint upsetting of the engine, the folding defect of the finish forging at the two ends is avoided, and the problem that the conventional joint forging cannot be efficiently and economically prepared into the joint forging meeting the expected use requirement is solved.

Drawings

FIG. 1 is a schematic diagram of a blank upsetting assembly according to the present utility model;

FIG. 2 is a schematic diagram of the comparative structure of the original process and the new process according to the present utility model.

In the figure:

1. upsetting blank components; 11. upsetting blank body; 12. the round angle I; 13. a second round angle; 14. and a third round angle.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

A joint pre-forging piece and a upsetting blank assembly 1; the upsetting blank assembly 1 comprises: the top of the upsetting blank body 11 is provided with a first round corner 12; the second round angle 13 is arranged on the outer side wall of the upsetting blank body 11; and the third round corner 14 is arranged on the outer side wall of the upsetting blank body 11.

Referring to fig. 1-2, during processing, the first round corner 12, the second round corner 13 and the third round corner 14 function to prevent creases from being generated at two ends of the upsetting body 11 after the upsetting body 11 is finish forged.

Example two

s1: blanking, namely cutting a long metal bar for manufacturing the fuel pipe joint of the engine into sections of blanks on a shearing machine or a sawing machine, and storing the blanks in a raw material station for standby; the long metal bar in the step S1 is cut to form a section of blank with the diameter of 50 mm+/-1 mm;

s2: heating, namely placing the prepared blank into a heating furnace, and heating to a malleable temperature range to obtain a heated blank; a chamfering step is further included between the S1 and the S2; the heating temperature of S2 is 1150-1250 ℃, and the heating time is 5-10S;

s5: placing the engine fuel pipe joint pre-forging piece into a final forging die to perform final forging forming through a forging press to obtain an engine fuel pipe joint final forging piece; the S3 semi-closed type pre-forging, the S4 closed type upsetting blank and the S5 open type final forging are completed on a forging and pressing device, and the device is provided with 3 stations;

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A joint pre-forging, comprising: a upsetting blank assembly (1); the upsetting blank assembly (1) comprises:

the upsetting blank body (11) is provided with a first round corner (12) at the top;

the second round corner (13) is arranged on the outer side wall of the upsetting blank body (11);

and the third round corner (14) is arranged on the outer side wall of the upsetting blank body (11).