CN102989989A - Forging process of heavy truck steering knuckle - Google Patents

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 Forging Technology of heavily blocking 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 satisfy the heavy truck front-wheel steer with the forging mold technological development of knuckle and manufacture needs.

Background technology

Heavy truck belongs to the stock class knuckle of special-shaped minute mould with knuckle.Its blank is that complexity coefficient is the complex forging of S4 level, the traditional mode of production means are with square steel billets or bar production, material weight is generally at 46Kg ~ 48Kg, be heated to 1050 ℃ ± 100 with gas burner, use the 750Kg pneumatic hammer to fall out its stock part, then putting into shaping dies forms with 5 tons forging hammer, one day 8 hours output more than 100 parts, raw material heat time heating time of traditional handicraft is be as the criterion every stove at least 2 hours of 3 tons of raw material, two stoves need need a people to operate 4 hours heat time heating time, carry out the 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, adopt 630 tons of punch presses to cut about 20 seconds of overlap time after forging, need operating personnel two people, so need 8 ~ 10 people to cooperate production, parameter in the production process is difficult for controlling, and middle activity time is long, and metal temperature can push away long the need at any time to be reduced, need sometimes two fire to forge, and product quality is difficult to guarantee that volume production is got up particularly difficult, is to forge the very thing of headache of enterprise, time-consuming, effort production efficiency is low, quality is unstable, and stock utilization is low, but social required quantity is very large again.

Summary of the invention

Defective in view of the prior art existence, the objective of the invention is to provide a kind of Forging Technology of heavy card knuckle, controlled and the economic benefit of the technological parameter of manufacture process of the present invention 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:

Heavily block the Forging Technology of knuckle, specific embodiment is as follows:

1, blank is prepared

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

2, blank heating

Adopt the 1500Kw intermediate frequency furnace to heat, be 45 seconds heat time heating time, and raw material are heated to 1100 ± 50 ℃ of temperature, and production process needs 1 people operation.

3, blank forging moulding

Utilize closed molds to carry out sub-material and the anti-bar section of squeezing at 6300 tons of hot forging equipment, recycling is given forging mould and is carried out 2 sub-materials and pressure ram section to finished size, utilizing at last finish-forging die to carry out final molding needs 15 seconds to shape of product and size production process, and the operation number is 2 people.

4, side cut and correction

Utilize side cut and Correction Die to excise remaining overlap at 630 tons of equipment, and carried out finishing production process needs 10 seconds, operation number two people.

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

Description of drawings

The attach most importance to front view of card knuckle of Fig. 1;

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 that gives 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 process chart of the present invention.

The specific embodiment

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

Being analyzed as follows of concrete Forging Technology: because 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 that reflects is the long problem of bar section.

Formulate concrete technology according to the problems referred to above:

1. the formulation of blank drawing

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

2. its closed extrusion pressing mold Design of Dies

The design key point: (1) Closed Extrusion mold pin button crack 0.8mm(causes upper and lower mould stuck less than this size easily, causes easily overlap greater than this size); (2) extruding snap close angle, best angle are 7 ° (guaranteeing that namely mould is fully closed, can play guide effect again)

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

Specific embodiment of the present invention is as follows:

1, blank is prepared

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

2, blank heating

Adopt the 1500Kw intermediate frequency furnace to heat, be 45 seconds heat time heating time, and raw material are heated to 1100 ± 50 ℃ of temperature, and production process needs 1 people operation.

3, blank forging moulding

Utilize closed molds at 6300 tons of hot forging equipment, such as Fig. 4, Fig. 5, carry out sub-material and the anti-bar section of squeezing, recycling is given forging mould, carry out 2 sub-materials and pressure ram section to finished size such as Fig. 6, Fig. 7, utilizing at last finish-forging die such as Fig. 8, Fig. 9 to carry out final molding needs 15 seconds to shape of product and size production process, and the operation number is 2 people.

4, side cut and correction

Utilize side cut and Correction Die to excise remaining overlap at 630 tons of equipment, and carried out finishing production process needs 10 seconds, operation number two people.

The present invention can technical process as shown in figure 10, the present invention can guarantee the moulding of a fire time product, but the Effective Raise stock utilization is guaranteed the reliability of product quality, enhances productivity and saves simultaneously a large amount of manpowers.

Claims (1)

1. heavily block the Forging Technology of knuckle, it is characterized in that: the specific embodiment of Forging Technology of heavily blocking knuckle is as follows,

(1) blank is prepared

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

(2) blank heating

Adopt the 1500Kw intermediate frequency furnace to heat, be 45 seconds heat time heating time, and raw material are heated to 1100 ± 50 ℃ of temperature, and production process needs 1 people operation;

(3) blank forging moulding

Utilize closed molds to carry out sub-material and the anti-bar section of squeezing at 6300 tons of hot forging equipment, recycling is given forging mould and is carried out 2 sub-materials and pressure ram section to finished size, utilizing at last finish-forging die to carry out final molding needs 15 seconds to shape of product and size production process, and the operation number is 2 people;

(4) side cut and correction

Utilize side cut and Correction Die to excise remaining overlap at 630 tons of equipment, and carried out finishing production process needs 10 seconds, operation number two people.

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