CN102989989B

CN102989989B - Forging process of heavy truck steering knuckle

Info

Publication number: CN102989989B
Application number: CN201210293844.0A
Authority: CN
Inventors: 徐悦波; 纪长全; 孔繁磊
Original assignee: DALIAN DV VALVE Co Ltd
Current assignee: DALIAN DV VALVE Co Ltd
Priority date: 2012-08-17
Filing date: 2012-08-17
Publication date: 2015-02-11
Anticipated expiration: 2032-08-17
Also published as: CN102989989A

Abstract

The invention relates to a forge piece blank of a car component, in particular to a forging process of a heavy truck steering knuckle. During the process of manufacturing the heavy truck steering knuckle, a medium-frequency induction furnace is used for heating, and a blank of a fire molding product is manufactured by using 6, 300 tons of hot die forgings to perform closed extrusion. The technological parameters of the whole process are controllable and the economic benefit is considerable; by utilizing the forging process, the use ratio of the material can be increased by about 15%, and meanwhile the production efficiency is improved by five times and the labor is reduced by 50%; and the quality of the product is in a controllable state because of being undetermined, a mold can be used for producing five thousand to eight thousand products, and auxiliary blank manufacturing devices and persons are omitted.

Description

The heavily Forging Technology of card knuckle

Technical field

The present invention relates to a kind of auto parts and components forging blank, be specifically related to a kind of heavy truck steering knuckle forging technique, the present invention can meet the forging mold technological development of heavy truck front-wheel steer knuckle and manufacture needs.

Background technology

Heavy truck knuckle belongs to the stock class knuckle of special-shaped parting.The complex forging of its blank to be complexity coefficient be S4 level, traditional mode of production means are produced with square steel billets or bar, material weight is generally at 46Kg ~ 48Kg, 1050 DEG C ± 100 are heated to gas burner, 750Kg pneumatic hammer is used to fall out its stem portion, then put into the shaping dies forging hammer of 5 tons to form, output more than 100 part of one day 8 hours, raw material heat time of traditional handicraft to be as the criterion every stove at least 2 hours with 3 tons of raw material, two stoves need the heat time of 4 hours to need a people to operate, carry out pneumatic hammer base and need 3 people, the base time is at least 90 seconds, it is 30 seconds that 5 tons of hammer tons need two people to forge the time, 630 tons of punch presses are adopted to cut about 20 seconds of overlap time after forging, need operating personnel two people, produce so need 8 ~ 10 people to carry out cooperation, parameter in production process not easily controls, the intermediate step time is long, metal temperature can push away long need at any time to be reduced, need two fire forgings sometimes, and product quality is difficult to ensure, volume production is got up particularly difficult, it is the thing of forging enterprise very headache, time-consuming, effort production efficiency is low, quality is unstable, stock utilization is low, but social required quantity is very large again.

Summary of the invention

In view of the defect that prior art exists, the object of the invention is the Forging Technology that a kind of heavy card knuckle will be provided, the technological parameter of manufacture process of the present invention is controlled and economic benefit is considerable, has effectively heightened stock utilization and has greatly improved production efficiency.

For achieving the above object, the technology used in the present invention solution is:

The heavily Forging Technology of card knuckle, specific embodiment is as follows:

1, blank prepares

Raw material adopt the long 260mm of 42CrMo, sawing machine blanking diameter of phi 160mm.

2, blank heating

Adopt 1500Kw intermediate frequency furnace to heat, the heat time is 45 seconds, and raw material are heated to temperature 1100 ± 50 DEG C, and production process needs 1 people's operation.

3, blank forging is shaping

6300 tons of hot forging equipment utilize closed molds carry out sub-material and anti-crowded bar portion, recycling give forging mould carry out 2 sub-materials and pressure ram portion to finished size, finally utilize finish-forging die to carry out final molding and need 15 seconds to shape of product and size production process, operation number is 2 people.

4, trimming and correction

630 tons of equipment utilize trimming and Correction Die to excise remaining overlap, and carries out finishing production process and need 10 seconds, operation number two people.

Manufacture process of the present invention is intermediate frequency furnace heating, carries out Closed Extrusion mode carry out the fiery shaped article of base one by 6300 tons of hot forgings.The technological parameter of whole process is all controlled and economic benefit is appreciable, adopt present invention process can heighten stock utilization about 15%, simultaneously enhance productivity 5 times and people does minimizing 50%, product quality prepattern is in can state of a control, and 5000-8000 part can be guaranteed die life, dispensed auxiliary shaping equipment and personnel simultaneously.

Accompanying drawing explanation

Fig. 1 attaches most importance to the front view of card knuckle;

Fig. 2 is the upward view of forging;

Fig. 3 is the top view of forging;

Fig. 4 is extruding blanking mold installation diagram;

Fig. 5 is the top view of Fig. 4;

Fig. 6 is the installation diagram giving forging mould;

Fig. 7 is the top view of Fig. 6;

Fig. 8 is the installation diagram of finish-forging die;

Fig. 9 is the top view of Fig. 8;

Figure 10 is present invention process flow chart.

Detailed description of the invention

Specific embodiment of the invention scheme is as follows: the present invention adopts the method for Closed Extrusion,

Being analyzed as follows of concrete Forging Technology: due to this product length direction longest dimension: 347.5mm; This product width direction longest dimension: 230mm; This product short transverse longest dimension: 309mm; Inclusion body weight: 263 Kg; Forge weight: 31.5 kg; S=0.12 belongs to S4 level complex forging, and its outstanding problem reflected is the long problem in bar portion.

Concrete technology is formulated according to the problems referred to above:

1. the formulation of blank drawing

Emphasis solves the formation problems in bar portion, but cannot be consistent with terminal size, designed according to the immutable principle of weight, the weight that barre portion lacks transfers to upper pole part, corresponding part of the upper die, as shown in Fig. 1 ~ Fig. 3, the forge weight of shaping forming is slightly larger than final products weight, and namely base forging weighs 35 Kg

2. its closed extrusion pressing mold Design of Dies

Design key point: (1) Closed Extrusion mould pin buckle gap 0.8mm(is less than this size, easily causes upper and lower mould stuck, is greater than this size and easily causes overlap); (2) extrude snap close angle, best angle is 7 ° (namely ensureing that mould is completely closed, can play guide effect again)

Its extrusion die mould is as Fig. 4, Fig. 5.

Specific embodiment of the present invention is as follows:

1, blank prepares

2, blank heating

3, blank forging is shaping

6300 tons of hot forging equipment utilize closed molds, as Fig. 4, Fig. 5, carry out sub-material and anti-crowded bar portion, recycling gives forging mould, as Fig. 6, Fig. 7 carry out 2 sub-materials and pressure ram portion to finished size, finally utilize finish-forging die to need 15 seconds as Fig. 8, Fig. 9 carry out final molding to shape of product and size production process, operation number is 2 people.

4, trimming and correction

The present invention can technical process as shown in Figure 10, the present invention can guarantee the shaping of a fire time product, effectively can improve stock utilization, guarantee the reliability of product quality, enhance productivity and save a large amount of manpower simultaneously.

Claims

1. the Forging Technology of heavy card knuckle, is characterized in that: heavily the specific embodiment of the Forging Technology of card knuckle is as follows,

(1) blank prepares

Raw material adopt the long 260mm of 42CrMo, sawing machine blanking diameter of phi 160mm;

(2) blank heating

Adopt 1500Kw intermediate frequency furnace to heat, the heat time is 45 seconds, and raw material are heated to temperature 1100 ± 50 DEG C, and production process needs 1 people's operation;

(3) blank forging is shaping

6300 tons of hot forging equipment utilize closed molds carry out sub-material and anti-crowded bar portion; Closed Extrusion Die lock catch gap 0.8mm, extruding snap close angle is 7 °;

Recycling give forging mould carry out 2 sub-materials and pressure ram portion to finished size, finally utilize finish-forging die to carry out final molding to shape of product and size, the shaping production process of blank forging needs 15 seconds, and operation number is 2 people;

(4) trimming and correction

630 tons of equipment utilize trimming and Correction Die to excise remaining overlap, and carries out finishing, the production process of trimming and correction needs 10 seconds, operation number two people.