CN1367056A - Continuous local plastic precision forming device of automobile half axle gear and its process - Google Patents

Abstract

The present invention provides an automobile half-axle gear continuous local plastic precision forming equipment and its technological process, and relates to an improvement on metal wedge rolling and extruding combined precision forming equipment and its process. The said equipment mainly is formed from automobile half axle gear wedge rolling blank-making device mounted on the plate-pressing rolling plastic precision forming machine and gear extruding precision forming device mounted on the hydraulic press. Its process includes the steps of wedge rolling to make blank and extruding and precision forming. It is easy to implement automation and its cost is low.

Description

Continuous local plastic precision forming device of automobile half axle gear and technology

Technical field:

The invention belongs to the plastic working field in the Modern Manufacturing Technology, relate to a kind of metal wedge rolling and the smart device that is shaped of extruding combination and the improvement of technology.

Background technology:

The automobile half axle gear shape is very complicated, its profile is made up of bevel gear and step cylinder, its interior shape is the featherway of interior straight-tooth, and machining accuracy and mechanical performance all there is very high requirement, existing processing technology has plenty of the turning of employing base, dig the combined machine processing of the straight-tooth and the slotting feather key internal tooth of bevel gear then, the group technology that adopts the hot forging forming bevel gear, inserts the feather key internal tooth is also arranged, but all exist the utilization rate of material and working (machining) efficiency low, and equipment investment is big and the shortcoming of bad mechanical property.

Technology contents:

Technical problem to be solved by this invention is: provide a kind of and can improve stock utilization and working (machining) efficiency significantly, can improve the mechanical performance of automobile half axle gear again, and equipment investment is low, continuous local plastic precision forming device of automobile half axle gear that machining accuracy is high and technology.

Device of the present invention is as follows:

This device mainly (see the patent No.: form by being contained in the plate pressing rolling plastic finish forming machine by automobile half axle gear wedge rolling base device ZL95109500.5) and the gear extruding precision forming device that is contained on the hydraulic press.

Automobile half axle gear wedge rolling base is finished on the plate pressing rolling plastic finish forming machine:

The upper and lower template that is contained on the roll extrusion plastic precision forming machine is provided with the identical antisymmetry type groove of processing according to the gear blank geometry, upper and lower template is contained in respectively and slides up and down on the pressing plate, upper and lower sliding clamp contacts tangent respectively with upper and lower pressure roller, upper and lower template is slided relatively with upper and lower pressing plate.

Automobile half axle gear extruding precision forming device, form by last device, lower device and gas-liquid spring pressure container:

In last device, punch is contained in the interior punch fairlead in going up, cooperation slides over each other, punch in punch fairlead gland is packed into upward by the upper end of punch in last in going up, and with itself and last in the punch fairlead fix, going up outer punch (shape of punch is not have the configuration design of bevel gear part by automobile half axle gear) is packed into by the below of last interior punch, and go up between the outer rim of the inwall of outer punch and last interior punch to being slidingly matched, to go up outer punch and last in the punch fairlead fix, outside die (being provided with the type groove of bevel gear profile of tooth in die) is pressed in the punch pre-tightening sleeve, again last outer punch fairlead is pressed into, last outer punch packed into go up in the outer punch fairlead, each other for being slidingly matched, again punch in last is contained in the interior punch mounting blocks, after being fixed, punch mounting blocks in last is fixed tightly in the below of press moved cross beam, at last die and last outer punch pre-tightening sleeve is fixed on the workbench.

In lower device, in the end of lower punch is conical, with taper shape join for cylindrical, the diameter of cylinder equals the diameter of featherway tooth top in the automobile axle shaft, and joining with cylinder is the profile of tooth of feather key, is processed with interior featherway in the inboard of lower punch fairlead, lower punch is from bottom to top to be contained in the lower punch fairlead, being slidingly matched between lower punch and the lower punch fairlead, fixedlys connected with the liftout tank plunger of press in the lower end of lower punch, and the lower punch fairlead is fixed on the below of workbench.

Liquid oils is equipped with in pressure vessel bottom at the gas-liquid spring cylinder, is compressed air on the top of container, is provided with pressure sensor, air intake-exhaust door, pressure regulator valve on pressure vessel, and the hydraulic oil of pressure vessel is communicated with the high-voltage oil cavity of last device by pressure regulator valve.

Technology of the present invention is as follows:

Physical dimension according to automobile half axle gear, and oxidation consume with due regard to, cut-out amount and machine-finish allowance, determine the cross wedge rolling base figure of automobile half axle gear according to the constancy of volume law, determine the diameter and the length of round bar by cross wedge rolling base figure, earlier with band sawing machine blanking, Frequency Induction Heating, wedge rolling base on the plate pressing rolling plastic finish forming machine pushes smart the shaping at last on hydraulic press then.

Wedge rolling base:

The round bar that is heated to forging temperature, by being contained on the plate pressing rolling plastic finish forming machine, the porch of lower bolster, start press, last, in the relative sliding process of lower bolster, bar is the wedge rollforming just, final cutting becomes the blank of four automobile hind axle gear wedges rolling, and by last, the outlet of lower bolster falls into conveyer belt or other material-receiving device, in the cross wedge rolling process of automobile axle shaft base, on, the type groove of lower bolster is according to the design of automobile axle shaft base material physical dimension, and every rolling is once earlier determined drafts h by entrance angle α, rolling half cycle and to add amount of lap k be rolling step-length K is α as the n time entrance angle again _n, drafts is h _n, step-length is

, and then the essence more than half cycle rolls, final cutting becomes the blank of automobile half axle gear.

Extruding is smart to be shaped:

Putting into die through the automobile half axle gear blank of wedge rolling, start press, moved cross beam moves down, and pressure regulator valve is in closed condition at this moment, the liquid of hydraulic cavities can not be compressed, above evagination mould just moves down in the punch guide pin bushing outside last, the bevel gear profile and the profile of tooth of automobile axle shaft just are extruded, start Lifting Device then, along with the plunger of liftout cylinder moves up, lower punch just moves up with respect to the lower punch guide pin bushing, punch pushes gear blank, just extrude the interior featherway of automobile half axle gear, and clout has been clamp-oned in the interior punch cavity, opened pressure regulator valve at last, moved cross beam is after overcoming the gases at high pressure strain of pressure vessel, continue to move down, punch just moves down with respect to punch guide pin bushing in last in going up, a cylindrical end pressure shaping of automobile half axle gear.

The invention has the beneficial effects as follows:

1, the equipment tonnage of the smart group technology needs that are shaped of wedge rolling base and extruding is little, and can give full play to the potential ability of material plasticity;

2, blank is good to the filling of mould, has significantly reduced the cutting output of machining, has improved stock utilization and production efficiency significantly, and metallic fiber distributes rationally, the mechanical performance height;

3, production procedure is simple and direct, easily is automated;

4, no impact, noise and other environmental hazard;

5, equipment investment is low, and workman's technology is not had specific (special) requirements;

Description of drawings:

Fig. 1 .1 is the front view of automobile half axle gear, and Fig. 1 .2 is the side view of Fig. 1 .1;

Fig. 2 .1 is the front view of the single wheel blank of wedge rolling, and Fig. 2 .2 is the front view of 4 gears;

Fig. 3 .2 is the front view of the single gear of automobile axle shaft, and Fig. 3 .1 is the side view of Fig. 3 .2 column part, and Fig. 3 .3 is the stereogram of single awl tooth, and Fig. 3 .4 is the cross-sectional view of Fig. 3 .3;

Fig. 4 is the smart process chart that is shaped of automobile half axle gear cross wedge rolling base and extruding;

Fig. 5 .1 is the front view of the used plate pressing rolling plastic finish forming machine of automobile half axle gear roll extrusion base, and Fig. 5 .2 is the side view of Fig. 4 .1;

Fig. 6 .1 is that the present invention enters the mouth and the mould longitudinal section about automobile half axle gear rolling base bar, and Fig. 6 .2 is that the present invention is about automobile axle shaft rollforming template longitudinal section and workpiece outlet diagram;

Fig. 7 .1 is the A corresponding to Fig. 6 .1 ₁-A ₁To mould type groove figure, Fig. 7 .2 is the A corresponding to Fig. 6 .1 ₂-A ₂To mould type groove figure, Fig. 7 .3 is the A corresponding to Fig. 6 .1 ₃-A ₃To mould type groove figure, Fig. 7 .4 is the A corresponding to Fig. 6 .1 ₄-A ₄To mould type groove figure, Fig. 7 .5 is the A corresponding to Fig. 6 .1 ₅-A ₅To mould type groove figure;

Fig. 8 is that the B-B of Fig. 7 is to view;

Fig. 9 is the type groove vertical view (upper and lower template is complete antisymmetry shape) of cross wedge rolling template;

Figure 10 is smart press and the installation drawing that is shaped of automobile axle shaft extruding that the present invention proposes;

Below in conjunction with accompanying drawing rolling base of the present invention and smart shaping of extruding are further described:

Wherein: the 1st, the last pressure roller of plate pressing rolling plastic finish forming machine, the 2nd, last sliding clamp, the 3rd, cope match-plate pattern, the 4th, mold cavity, the 5th, lower bolster, the 6th, lower slider pressing plate, the 7th, lower compression roller, the 8th, following cutoff tool, the 9th, last cutoff tool, the 10th, basis, the 11st, press support, the 12nd, press column, the 13rd, fixed cross beam on the press, the 14th, work master cylinder, the 15th, compensating cylinder, the 16th, moved cross beam, the 17th, punch mounting blocks in going up, the 18th, punch in going up, the 19th, punch fairlead gland in going up, the 20th, punch fairlead in going up, the 21st, hydraulic cavities, the 22nd, punch cavity in going up, the 23rd, go up outer punch, the 24th, go up outer punch fairlead, the 25th, pre-tightening sleeve, the 26th, through the wheel blank of wedge rolling, the 27th, concave die cavity, the 28th, die, the 29th, press bed, the 30th, lower punch fairlead, the 31st, lower punch, the 32nd, liftout tank plunger, the 33rd, hydraulic pressure liftout tank, the 34th, pressure vessel, the 35th, pressure regulator valve, the 36th, liquid oils, the 37th, pressure sensor, the 38th, compressed air, the 39th, air inlet and exhaust valve.

Automobile half axle gear extrusion forming process and device proposed by the invention are applicable to hot extrusion, warm extrusion pressure and cold extrusion, also are applicable to heat, gentle cold-stamped combination extruding.

Embodiment:

The dimensional parameters of bevel gear is: modulus m=6; Tooth number Z ₁=24, Z ₂=12; Profile angle α=22.5; Height of teeth top h _a=3.315; Whole depth h=10.799; Facewidth B=24; Spline tooth number n=8; C ₁=30; C ₂=10.2; C ₃=12.5; D ₁=70; D ₂=126; D ₃=136; D ₄=96; D ₅=54.716; D ₆=47.

1. the calculating of gear volume

(1) the volume V of single tooth ₁Calculating

In trapezoidal ABCD, by known conditions can in the hope of:

S _a＝CD＝8.1828；S _f＝AB＝12.4789； $R=m\&CenterDot;\sqrt{{\mathrm{<figure-callout\; id="1"\; label="Z"\; filenames="A0113339100221.png"\; state="\{\{state\}\}">Z</figure-callout>}}_1^2+{\mathrm{<figure-callout\; id="2"\; label="Z"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">Z</figure-callout>}}_2^2}/2=80.4984$

So area of isosceles trapezoid ABCD:

A ₁=(S _a+ S _f) h/2=111.5631 again because the small end of tooth with hold greatly similar, so the area of isosceles trapezoid A ' B ' C ' D ':

A ₂=A ₁(R-B) ²/ R ²So volume of=54.9564 single teeth: ${\mathrm{<figure-callout\; id="1"\; label="V"\; filenames="A0113339100221.png"\; state="\{\{state\}\}">V</figure-callout>}}_1=\frac{1}{3}\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="A"\; filenames="A0113339100221.png"\; state="\{\{state\}\}">A</figure-callout>}}_1\&CenterDot;R-\frac{1}{3}\&CenterDot;{\mathrm{<figure-callout\; id="2"\; label="A"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">A</figure-callout>}}_2\&CenterDot;(R-B)=1958.583$

(2) the volume V except that tooth ₃Calculate ${\mathrm{<figure-callout\; id="3"\; label="A"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">A</figure-callout>}}_3=2\&CenterDot;\underset{0}{\overset{4.5}{\&Integral;}}(\sqrt{\frac{{\mathrm{<figure-callout\; id="5"\; label="D"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_5^2}{4}-x^2}-\sqrt{\frac{{\mathrm{<figure-callout\; id="6"\; label="D"\; filenames="A0113339100182.png,A0113339100191.png"\; state="\{\{state\}\}">D</figure-callout>}}_6^2}{4}-x^2})\mathrm{dx}$

The volume of single splined hole:

V ₂＝A ₃(C ₁+C ₂+C ₃)＝1839.625

So disregard the volume of the bevel gear of tooth be: ${\mathrm{<figure-callout\; id="3"\; label="V"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">V</figure-callout>}}_3=\mathrm{\&pi;}\&CenterDot;\frac{{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_1^2}{4}\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="A0113339100221.png"\; state="\{\{state\}\}">C</figure-callout>}}_1+\frac{\mathrm{\&pi;}}{3}\&CenterDot;[\frac{{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">D</figure-callout>}}_2^2}{4}+\frac{{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_3^2}{4}+\frac{{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">D</figure-callout>}}_2\&CenterDot;{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_3}{4}]\&CenterDot;{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+\frac{\mathrm{\&pi;}}{3}\&CenterDot;[\frac{{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_3^2}{4}+\frac{{\mathrm{<figure-callout\; id="4"\; label="D"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">D</figure-callout>}}_4^2}{4}+\frac{{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_3\&CenterDot;{\mathrm{<figure-callout\; id="4"\; label="D"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">D</figure-callout>}}_4}{4}]\&CenterDot;C_3$ $-\mathrm{\&pi;}\&CenterDot;\frac{{\mathrm{<figure-callout\; id="6"\; label="D"\; filenames="A0113339100182.png,A0113339100191.png"\; state="\{\{state\}\}">D</figure-callout>}}_6^2}{4}\&CenterDot;({\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="A0113339100221.png"\; state="\{\{state\}\}">C</figure-callout>}}_1+{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_3)-n\&CenterDot;{\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">V</figure-callout>}}_2=2.8026\&times;{10}^5$

The cumulative volume of the bevel gear of band internal spline: V=Z ₁V ₁+ V ₃=3.2727 * 10 ⁵

2. billet size determines

(1) determines the length L of blank ₀

According to the constancy of volume law, will be with the bevel gear of internal splined hole to be converted into the not bevel gear of wounded in the battle keyhole $V_a=\mathrm{\&pi;}\&CenterDot;\frac{{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_1^2}{4}\&CenterDot;X+\mathrm{\&pi;}\&CenterDot;\frac{{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_3^2}{4}\&CenterDot;{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+\frac{\mathrm{\&pi;}}{3}\&CenterDot;[\frac{{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_3^2}{4}+\frac{{\mathrm{<figure-callout\; id="4"\; label="D"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">D</figure-callout>}}_4^2}{4}+\frac{{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_3\&CenterDot;{\mathrm{<figure-callout\; id="4"\; label="D"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">D</figure-callout>}}_4}{4}]\&CenterDot;{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">C</figure-callout>}}_3$

Equate by the volume of blank 1 volume, i.e. V=V with the bevel gear of band internal splined hole _a, can calculate: $X=\frac{4V-\mathrm{\&pi;}\&CenterDot;{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_3^2\&CenterDot;C_2-\frac{\mathrm{\&pi;}}{3}\&CenterDot;({\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_3^2+{\mathrm{<figure-callout\; id="4"\; label="D"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">D</figure-callout>}}_4^2+{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_3\&CenterDot;D_4)\&CenterDot;{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">C</figure-callout>}}_3}{\mathrm{\&pi;}\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_1^2}$ The length of blank then: (suppose incision size Δ=3mm)

L ₀＝4·(X+C ₂+C ₃)+3·Δ $=4\&CenterDot;(\frac{4V-\mathrm{\&pi;}\&CenterDot;{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_3^2\&CenterDot;C_2-\frac{\mathrm{\&pi;}}{3}\&CenterDot;({\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_3^2+{\mathrm{<figure-callout\; id="4"\; label="D"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">D</figure-callout>}}_4^2+{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_3\&CenterDot;D_4)\&CenterDot;{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="A0113339100191.png,A0113339100221.png"\; state="\{\{state\}\}">C</figure-callout>}}_3}{\mathrm{\&pi;}\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_1^2}+{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_3)+3\&CenterDot;\mathrm{\&Delta;}$

＝147.2818

(2) determine the diameter D of blank ₀

If the diameter of blank is D ₀, and the hypothesis machining amount be total amount 6%, hot scaling loss amount is 8% of total amount.Then get by the constancy of volume principle: $\mathrm{\&pi;}\&CenterDot;\frac{D_0^2}{4}\&CenterDot;L_0=4\&CenterDot;V\&CenterDot;(1+6\%+8\%)+V_{\mathrm{\&Delta;}}$ $=4\&CenterDot;V\&CenterDot;(1+6\%+8\%)+\mathrm{\&Delta;}\&CenterDot;(\frac{\mathrm{\&pi;}\&CenterDot;{\mathrm{<figure-callout\; id="4"\; label="D"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">D</figure-callout>}}_4^2}{4}+\frac{\mathrm{\&pi;}\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_1^2}{4}\&CenterDot;2)$ Can calculate: $D_0=\sqrt{\frac{16V\&CenterDot;(1+6\%+8\%)+\mathrm{\&Delta;}\&CenterDot;(\mathrm{\&pi;}\&CenterDot;{\mathrm{<figure-callout\; id="4"\; label="D"\; filenames="A0113339100221.png,A0113339100231.png"\; state="\{\{state\}\}">D</figure-callout>}}_4^2+2\&CenterDot;\mathrm{\&pi;}\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A0113339100221.png"\; state="\{\{state\}\}">D</figure-callout>}}_1^2)}{\mathrm{\&pi;}\&CenterDot;L_0}}=115.2759$

3. template size determines

The process of bevel gear is: blank reaches the size of expection through after feeding several times, the rolling.Carry out shaping then, cut off by cutoff tool at last, whole process is once finished.In feeding, rolling process: suppose that the diameter of blank is D before the feeding _Before, the diameter of blank is D after the rolling _After, then the length of each wedge rolling is: The step-length of each rolling is:

The step-length of shaping and cut-out is: If drafts is 4mm,, be followed successively by according to the template length of the each feeding of above various calculating, rolling correspondence so through reaching the minimum diameter D1 of blank after six feedings:

L ₁＝181.07+224.68＝405.75 L ₂＝168.51+207.92＝376.43

L ₃＝155.94+191.17＝347.11 L ₄＝143.37+174.41＝317.78

L ₅＝130.81+157.66＝288.47 L ₆＝118.24+146.61＝264.85

L _Shaping=L _{Cut off}=146.61

So the total length L of template=2293.61, the width of template are B=L ₀=147.2818.

Claims (2)

1, a kind of continuous local plastic precision forming device of automobile half axle gear and technology are made up of the plate pressing rolling plastic finish forming machine; It is characterized in that:

A, the upper and lower template that is contained on the roll extrusion plastic precision forming machine are provided with the identical antisymmetry type groove of processing according to the gear blank geometry, upper and lower template is contained in respectively and slides up and down on the pressing plate, upper and lower sliding clamp contacts tangent respectively with upper and lower pressure roller, upper and lower template is slided relatively with upper and lower pressing plate.

B, automobile half axle gear extruding precision forming device, form by last device, lower device and gas-liquid spring pressure container:

In last device, punch is contained in the interior punch fairlead in going up, cooperation slides over each other, punch in punch fairlead gland is packed into upward by the upper end of punch in last in going up, and with itself and last in the punch fairlead fix, going up outer punch (shape of punch is not have the configuration design of bevel gear part by automobile half axle gear) is packed into by the below of last interior punch, and go up between the outer rim of the inwall of outer punch and last interior punch to being slidingly matched, to go up outer punch and last in the punch fairlead fix, outside die (being provided with the type groove of bevel gear profile of tooth in die) is pressed in the punch pre-tightening sleeve, again last outer punch fairlead is pressed into, last outer punch packed into go up in the outer punch fairlead, each other for being slidingly matched, again punch in last is contained in the interior punch mounting blocks, after being fixed, punch mounting blocks in last is fixed tightly in the below of press moved cross beam, at last die and last outer punch pre-tightening sleeve is fixed on the workbench.

In lower device, in the end of lower punch is conical, with taper shape join for cylindrical, the diameter of cylinder equals the diameter of featherway tooth top in the automobile axle shaft, and joining with cylinder is the profile of tooth of feather key, is processed with interior featherway in the inboard of lower punch fairlead, lower punch is from bottom to top to be contained in the lower punch fairlead, being slidingly matched between lower punch and the lower punch fairlead, fixedlys connected with the liftout tank plunger of press in the lower end of lower punch, and the lower punch fairlead is fixed on the below of workbench.

Liquid oils is equipped with in pressure vessel bottom at the gas-liquid spring cylinder, is compressed air on the top of container, is provided with pressure sensor, air intake-exhaust door, pressure regulator valve on pressure vessel, and the hydraulic oil of pressure vessel is communicated with the high-voltage oil cavity of last device by pressure regulator valve.

2, a kind of continuous local plastic precision forming device of automobile half axle gear and technology, its technology is:

A, wedge rolling base:

The round bar that is heated to forging temperature, by being contained on the plate pressing rolling plastic finish forming machine, the porch of lower bolster, start press, last, in the relative sliding process of lower bolster, bar is the wedge rollforming just, final cutting becomes the blank of four automobile hind axle gear wedges rolling, and by last, the outlet of lower bolster falls into conveyer belt or other material-receiving device, in the cross wedge rolling process of automobile axle shaft base, on, the type groove of lower bolster is according to the design of automobile axle shaft base material physical dimension, and every rolling is once earlier determined drafts h by entrance angle α, rolling half cycle and to add amount of lap k be rolling step-length K is α as the n time entrance angle again _n, drafts is h _n, step-length is

, and then the essence more than half cycle rolls, final cutting becomes the blank of automobile half axle gear.

B, the smart shaping of extruding:

Putting into die through the automobile half axle gear blank of wedge rolling, start press, moved cross beam moves down, and pressure regulator valve is in closed condition at this moment, the liquid of hydraulic cavities can not be compressed, above evagination mould just moves down in the punch guide pin bushing outside last, the bevel gear profile and the profile of tooth of automobile axle shaft just are extruded, start Lifting Device then, along with the plunger of liftout cylinder moves up, lower punch just moves up with respect to the lower punch guide pin bushing, punch pushes gear blank, just extrude the interior featherway of automobile half axle gear, and clout has been clamp-oned in the interior punch cavity, opened pressure regulator valve at last, moved cross beam is after overcoming the gases at high pressure strain of pressure vessel, continue to move down, punch just moves down with respect to punch guide pin bushing in last in going up, a cylindrical end pressure shaping of automobile half axle gear.

Images