CN1163169A - Wedge transverse rolling and vertical forging technology for forming rough forging of diesel engine oil sprayer - Google Patents

Abstract

The technological processes include producing precision rough forging comprising stepped bar part and one truncated cone end with heated bar material in wedge transverse roller, cutting into T-shaped rough forging, vertical forging in press and finallyc utting around overlap to result in forging product. The present invention can raise production precision of forging and material utilization, prolong service life of die and raise productione fficiency.

Description

Precise wedge lateral base-Li the forging forming process of injector bodies of diesel engines forging stock

The present invention relates in the Metal Forming industry, with cross wedge rolling the accurate base of injector bodies of diesel engines being existed side by side is swaged into the process of shape.

Oil injector body is the critical component of injection pump on the Diesel engine.Accompanying drawing 1 and accompanying drawing 2 are depicted as two kinds of patterns of oil injector body commonly used now.Domestic manufacturing process commonly used has two kinds, a kind of is horizontal die forging, promptly when die forging, oil injector body blocking blank horizontal positioned, die joint surrounds fuel injector body rod portion's center line (seeing accompanying drawing 3), this manufacturing process overlap area is big, the metal material of loss is many, bar portion easy deformation during side cut, thereby forging stock allowance is bigger, follow-up machined is many man-hour, and stock utilization is also low.Another kind is vertical die forging, and its preformed blank though the overlap loss is lacked than cross-forge, because the blocking blank is more coarse, has seriously influenced the finally shaped precision of forging with the pneumatic hammer pulling.

The objective of the invention is to improve the utilization rate of material, prolong die life, enhance productivity in order to improve the accuracy of manufacture of oil injector body forging.

Concrete solution of the present invention is as follows:

A kind of precise wedge lateral base of oil injector body forging stock founds forging forming process, its accurate base---and the upright processing step that is swaged into shape is followed successively by:

A, with the bar accurate base on cross wedge rolling machine after blanking and the heating, forging stock bar portion is shaped fully, reach the dimensional requirement of drawing regulation, head shuts out suitable shape and size; Blank its bar portion after rolling is a step bars portion, and the other end is frustum or boss;

B, card are pressed into T prefix profile;

C, the vertical shaping dies of inserting carry out vertical forging on forcing press;

Overlap around the d, topping, the finished product forging.

The key of process of the present invention, be the task that oil injector body is shaped to be combined by the accurate base of cross wedge rolling machine and two operations of upright forging respectively finish, brought into play the advantage of cross wedge rolling energy precision form multidiameter class part, the preformed blank of forging stock is realized on cross wedge rolling machine, the volume that this process has not only been finished material distributes, and finished the shaping task of many step bars of forging stock portion, its size reaches the drawing requirement, improved the dimensional accuracy of bar portion, make its precision meet or exceed " steel forging part " (GB12361-12362-90) regulation of micron order in the standard, and simplification technical process, alleviated the shaping task of die forging, thereby alleviated the wearing and tearing of shaping dies, improved die life.The vertical contour forging technique of the accurate base of cross wedge rolling machine of the present invention because volume distributes accurately, has reduced overlap and machine-finish allowance, thereby has improved stock utilization.

Compare technology of the present invention, but every material-saving 28% with existing technology.Because the shaping forging of technology of the present invention can be saved machining period 50%, thereby improve labor productivity near the final finished size.

The inventive method and domestic conventional method and the contrast of external advanced technologies method aspect effect are listed in the table below:

	The present invention	Domestic conventional method	External advanced technologies
				Process	The precise wedge lateral base stands and is swaged into shape	1. horizontal forging 2. open die forging bases stand and are swaged into shape	The multistation hot headers
Forming accuracy	Micron order in the steel forging part	The general level of steel forging part	Steel forging part micron order
				Stock utilization	High	Low	In
Equipment investment	In	Low	High
				Productivity ratio	In	Low	High
The forging cost	Low	In	High

As seen from table: the present invention provides the new technology of a kind of small investment, forming accuracy height, low cost of manufacture for the forming technology of oil injector body.

As follows to the appended description of drawings of this specification now:

Fig. 1 (a) is the pattern figure a kind of commonly used of existing oil injector body, and Fig. 1 (b) is the left view of Fig. 1 (a), and Fig. 1 (c) is the vertical view of Fig. 1 (a).

Fig. 2 (a) is the another kind of common pattern figure of existing oil injector body, and Fig. 2 (b) is the left view of Fig. 2 (a), and Fig. 2 (c) is the vertical view of Fig. 2 (a).

When Fig. 3 was existing horizontal die forging, the blocking blank was placed schematic diagram.

Accurate blocking blank (head in the centre) figure of Fig. 4 (a) for making with technology cross wedge rolling of the present invention, Fig. 4 (b) is the upright forging drawing that is swaged into the band overlap, Fig. 4 (c) is the finished product forging drawing that cuts behind the overlap.

Accurate blocking blank (head at the two ends) figure of Fig. 5 (a) for making with technology cross wedge rolling of the present invention, Fig. 5 (b) is the upright forging drawing that is swaged into the band overlap, Fig. 5 (c) is the finished product forging drawing that cuts behind the overlap.

The invention will be further described below in conjunction with drawings and Examples.

Embodiment one: oil injector body forming technology following (referring to Fig. 4):

One, blanking becomes original bar shown in the double dot dash line among Fig. 4 (a) 160 tons of bar shear loading and unloading.

Two, forge

1, heating: on 250 kilowatts of heating in medium frequency stoves, be heated to 1200 ℃.

2, cross wedge rolling base: being rolled into head shown in solid line among Fig. 4 (a) on 700 millimeters cross wedge rolling machines with cross wedge rolling die, cutting knife is installed,, is made two accurate blocking blanks simultaneously with cutting off in the middle of it in the cross wedge rolling die rear end at the blocking blank of centre.Its bar portion is a step bars portion, and the other end is a frustum.

3, card is pressed: with the card pressing mold head card is pressed into the T font on 80 tons of punch presses.

4, the upright forging: on 300 tons of friction presses, head is forged the forging of the band overlap shown in Fig. 4 (b) with upright forging mould.

5, cut edge: after cutting overlap with edger on 80 tons of punch presses, the oil injector body finished product forging shown in Fig. 4 (c).

Embodiment two: oil injector body forming technology following (referring to Fig. 5):

The processing step of present embodiment, employed equipment and mould and embodiment one are identical, unique difference is the blocking blank of the head of precise wedge lateral base one-tenth shown in solid line among Fig. 5 (a) at two ends, then after the head card is pressed into the T font, the upright forging that is swaged into the band overlap shown in Fig. 5 (b), cut overlap at last, form the oil injector body finished product forging shown in Fig. 5 (c).

Claims (1)

1, a kind of precise wedge lateral base of oil injector body forging stock---upright forging forming process is characterized in that: accurate base---the upright processing step that is swaged into shape is followed successively by:

A, with the bar accurate base on cross wedge rolling machine after blanking and the heating, forging stock bar portion is shaped fully, reach the dimensional requirement of drawing regulation, head shuts out suitable shape and size; Blank its bar portion after rolling is a step bars portion, and the other end is frustum or boss;

B, card are pressed into T prefix profile;

C, the vertical shaping dies of inserting carry out vertical forging on forcing press;

Overlap around the d, topping, the finished product forging.

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