Integral automobile steering joint rough forging realizes the method for hot extrusion forging
Technical field
The present invention relates to the forging method of the knuckle blank in automobile steering system, specifically integral automobile steering joint rough forging realizes the method for hot extrusion forging.
Background technology
The schematic diagram of integral automobile steering joint blank as shown in Figure 1, bar portion 1, flange 2, microtia fork 4, large ear fork 5 form an entirety.
The blank of traditional Integral steering joint, the horizontal forging of most employing, the bar portion of die joint from forging and the central plane horizontal parting of two theoretical machined kingpin bores, hot extrusion forges blank kingpin bore and just can not realize, horizontal forging because slewing journal structure change is complicated, projected area greatly, institute's forged blank overlap is large, forging needs very large hitting power, and stock utilization is low, machined fork and flange surplus is large, the time is long.
Summary of the invention
The present invention is to provide the method that integral automobile steering joint rough forging realizes hot extrusion forging, Vertical Heat can be realized and squeeze out blank kingpin bore, when ensureing qualified products, significantly save material, reduce fork process time, enhance productivity, integral automobile steering joint sleeping forging formula rough forging forging cost be high, stock utilization is low to solve, fork kingpin bore long processing time, a difficult problem that surplus is large.
Technical scheme of the present invention is: integral automobile steering joint rough forging realizes the method for hot extrusion forging, and concrete steps are as follows:
(1) structure of integral automobile steering joint rough forging is improved: integral automobile steering joint fork rough forging, pitched formed an entirety by bar portion, flange, microtia fork, large ear, the upper surface of flange and the central axis in bar portion, microtia fork overside face and the microtia angle pitched between top are the obtuse angle of 90-100 °, and making the center line along bar portion be the draft angle in withdrawing pattern direction is positive number; Die joint extends from flange face midplane to two ear forks, microtia fork, large ear fork correspond to the kingpin bore place of installing stub and is provided with the first reserved blind hole, the second reserved blind hole that extend from export-oriented center, bottom and the microtia wall thickness range of pitching between medial surface of the first reserved blind hole are 2-10 millimeter, bottom and the large ear wall thickness range of pitching between medial surface of the second reserved blind hole are 1.5-6 millimeter, and the diameter of the first reserved blind hole and the second reserved blind hole is determined to also have allowance 1.5-6 millimeter;
(2) hot extrusion forging: complete the first pre-forging by common forging press vertical forging, rough forging that the second pre-forging operation obtains not having the first reserved blind hole and the second reserved blind hole;
Then, the first reserved blind hole and the second reserved blind hole are finally forged in hot extrusion, adopt special forging equipment, the structure of described special forging equipment: comprise left column, right column, upper beam, underbeam, slide block, main hydraulic cylinder, bottom knockout hydraulic cylinder, left column, right column, upper beam, underbeam form frame, slide block is led on left column, right column by guiding pair, and main hydraulic cylinder is arranged on upper beam, and main hydraulic cylinder drives slide block; Bottom knockout hydraulic cylinder is arranged on below underbeam;
Left column, right column are separately installed with left electric screw mechanism, right electric screw mechanism; The structure of left electric screw mechanism, right electric screw mechanism is identical, concrete structure is: give flywheel through one-level gear power transmission by two motors, give screw pair power transmission again by flywheel, then give slide block by screw pair power transmission, thus realize Power output;
Voussoir, right fixing voussoir are fixed in the left side that is respectively equipped with above of slide block; Be provided with voussoir clamping mechanism below upper beam, voussoir clamping mechanism comprises left voussoir clamping mechanism, right voussoir clamping mechanism, and left voussoir clamping mechanism is made up of left side small cylinder, left movable wedge, and left side small cylinder drives left movable wedge; Right voussoir clamping mechanism is made up of right side small cylinder, right movable wedge, and right side small cylinder drives right movable wedge; The upper surface of left movable wedge, the upper surface of right movable wedge are slidably matched with the lower surface of upper beam respectively;
During use, slide block moves down and puts in place, voussoir clamping mechanism locking sliding block, the tension force produced when overcoming forging and stamping; Left electric screw mechanism, right electric screw mechanism, laterally realize crushing failure at high speed forging;
The process that hot extrusion is finally forged: the overside face of pitching because there being microtia and top arc be between obtuse angle, the finish-forging blank certain angle that tilts in mould ensures the blank energy demoulding of patrix, such design makes vertical forging blank just have normal pattern draft, just level may pitch circular bottom surface parting along flange face along large and small ear, bar portion is in counterdie die cavity, and large ear fork and microtia fork are in upper model cavity, second pre-forging operation blank is put into the bed die of hot extrusion kingpin bore under hot, moved down by special forging equipment slide block and make extruding kingpin bore patrix and counterdie matched moulds, formed by the voussoir clamping mechanism of special forging equipment after matched moulds, the locked mode of counterdie, to ensure on finish-forging, bed die is at the locked mode when extruding kingpin bore, after locked mode, left, it is axially large that You Liang electric screw mechanism promotes two extrusion dies fast, the extruding of microtia fork, blank is made to be full of die cavity while obtaining the first reserved blind hole (kingpin bore) and the second reserved blind hole (kingpin bore), then electric screw mechanism drives two mandrel returns, the voussoir clamping mechanism return of special forging equipment, after slide block drives mold return, oblique top material oil cylinder ejects the blank in bed die, realize integral automobile steering joint blank hot extrude and extrude kingpin bore.
Beneficial effect: owing to there being new Integral steering joint rough forging structure, adopt special forging equipment, the extrusion forging of Integral steering energy-conservation enough employings Vertical Heat is made to go out blank kingpin bore, save material more than 30%, production equipment tonnage declines about 50%, hot extrude extrudes blank kingpin bore, makes the processed finished products time improve about 10%, has increased substantially stock utilization, has reduced equipment investment and energy consumption, the follow-up machined efficiency of raising.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing integral automobile steering joint fork.
Fig. 2 is integral automobile steering of the present invention joint rough forging structural representation.
Fig. 3 is the special forging equipment schematic diagram that the present invention relates to.
Fig. 4 is the special forging equipment right view that the present invention relates to.
Fig. 5 is integral automobile steering of the present invention joint hot-extrusion mold structural representation.
Fig. 6 is the working state figure of the integral automobile steering joint hot-extrusion mold of invention design.
Wherein: 1 is bar portion; 2 is flange; 3 are bar portion center line and vertical with flange 2; 4 is microtia fork; 5 is large ear fork; 6 is die joint; 7 is large ear fork and microtia fork kingpin bore center line; 8 is microtia fork kingpin bore; 9 is large ear fork kingpin bore; 10 for a change microtia fork draft angle after; A is the obtuse angle between microtia is pitched between 4 overside faces and flange; β be microtia fork and large ear fork center line and horizontal between angle; 11 is left column; 12 is left electric screw mechanism; 13 is left side small cylinder; 14 is left movable wedge; 15 is left fixing voussoir; 16 is main hydraulic cylinder; 17 is upper beam; 18 is right movable wedge; 19 is right fixing voussoir; 20 is slide block; 21 is right side small cylinder; 22 is right electric screw mechanism; 2201 is screw pair; 2202 is slide block; 2203 is flywheel; 2204 is motor; 2205 is one-level gear; 23 is right column; 24 is bottom knockout hydraulic cylinder; 25 is underbeam; 26 is extrusion die patrix; 27 is extrusion die counterdie; 28 is large ear fork drift; 29 is microtia fork drift.
Detailed description of the invention
Special forging equipment as shown in Figure 3, comprise left column 11, right column 23, upper beam 17, underbeam 25, slide block 20, main hydraulic cylinder 16, bottom knockout hydraulic cylinder 24, left column 11, right column 23, upper beam 17, underbeam 25 form frame, slide block 20 is led on left column 11, right column 23 by guiding pair, main hydraulic cylinder 16 is arranged on upper beam 17, and main hydraulic cylinder 16 drives slide block 20; Bottom knockout hydraulic cylinder 24 is arranged on below underbeam, left column, right column is separately installed with left electric screw mechanism 12, right electric screw mechanism 22; Voussoir 15, right fixing voussoir 19 are fixed in the left side that is respectively equipped with above of slide block; Be provided with voussoir clamping mechanism below upper beam, voussoir clamping mechanism comprises left voussoir clamping mechanism, right voussoir clamping mechanism, and left voussoir clamping mechanism is made up of left side small cylinder 13, left movable wedge 14, and left side small cylinder 13 drives left movable wedge 14; Right voussoir clamping mechanism is made up of right side small cylinder 21, right movable wedge 18, and right side small cylinder 21 drives right movable wedge 18; The upper surface of left movable wedge 14, the upper surface of right movable wedge 18 are slidably matched with the lower surface of upper beam 17 respectively;
During use, slide block 20 moves down and puts in place, voussoir clamping mechanism locking sliding block, the tension force produced when overcoming forging and stamping; Left electric screw mechanism, right electric screw mechanism laterally realize crushing failure at high speed forging.
As shown in Figure 3, Figure 4, in the present invention, the structure of left electric screw mechanism and right electric screw mechanism is identical, the structure of right electric screw mechanism is: by two motors 2204 through one-level gear 2205 power transmission to flywheel 2203, by flywheel 2203 again power transmission to screw pair 2201, again by screw pair 2201 power transmission to slide block 2202, thus realize the Power output of electric screw mechanism.
Bottom knockout hydraulic cylinder according to different products, can adjust angle of inclination.
The present invention adopt the major function of special forging equipment to be as shown in Figure 3: slide block (or upwards) can carry out quick-make (or opening) mould vertically downward under the dynamic action of main hydraulic cylinder; After closed (or opening) mould, two oil cylinders on left and right two columns drive voussoir can snap in (or exiting) respectively and realize mould locking (or unblanking) between upper beam and slide block; After locking (or unblanking) mould, the active drift of two electric screw press structure bands of left and right transverse movement can carry out crushing failure at high speed forging (or returning); When needing to eject forging, material jacking mechanism according to different products, can adjust the angle of inclination of ejector beam.
In the present invention, the structure of described left electric screw mechanism and right electric screw mechanism is prior art, has two kinds of situations:
The first can be the screw conveyer of direct-drive electric screw press, comprises motor, the flywheel by motor direct-drive, the screw rod be fixed on flywheel, the slide block that driven by screw pair by screw rod;
The second, can be through the screw conveyer of the electric screw press that one-level gear transmits, comprise multiple motor, the rotating shaft of multiple motor is fixed with travelling gear, travelling gear engages with the edge of flywheel, realizes power transmission; Screw rod is fixedly connected with flywheel, the slide block driven by screw pair by screw rod.
As shown in Fig. 2, Fig. 5, Fig. 6, further describe the present invention as follows: integral automobile steering joint fork rough forging realizes the method for hot extrusion forging, and concrete steps are as follows:
(1) structure of integral automobile steering joint fork rough forging is improved: integral automobile steering joint fork rough forging, comprises bar portion 1, flange 2, and the right side of flange 2 upper surface, left both sides are respectively equipped with large ear fork 5 and microtia fork 4; In specific implementation process, the angle design for change between being pitched between the overside face of 4 and top arc by microtia is intentionally be greater than the obtuse angle that 90 ° are less than 100 °; (accompanying drawing 2, shown in 10 dash areas), the angle like this in blank between microtia fork and flange upper surface becomes obtuse angle by right angle, and be specially ear fork in upper model cavity, bar portion is in counterdie die cavity.
(2) hot extrusion forging: complete the first pre-forging by common forging press vertical forging, rough forging that the second pre-forging operation obtains not having the first reserved blind hole and the second reserved blind hole;
Then, the reserved blind hole of hot extrusion forging first and the second reserved blind hole (kingpin bore), adopt special forging equipment, obtuse angle is designed between the overside face that cause has microtia to pitch and flange face, the finish-forging blank certain angle that tilts in mould ensures the blank energy demoulding of patrix, and such design makes piloerection base just have normal pattern draft, just may level along flange face along microtia fork circular bottom surface parting, bar portion is in counterdie die cavity, and large ear fork and microtia fork are in upper model cavity.The counterdie 27 of hot extrusion kingpin bore put under hot by second blocking operation blank, special forging equipment (adopt the special forging equipment shown in Fig. 3) slide block is under main hydraulic cylinder dynamic action vertically downward, drive hot extrusion kingpin bore patrix 26 to move fast and carry out matched moulds with counterdie 27, after matched moulds, formed on hot extrusion kingpin bore by the voussoir clamping mechanism of special forging equipment, the locked mode of counterdie, after locked mode, left, You Liang electric screw mechanism promotes large ear fork drift 28 fast, microtia fork drift 29 makes blank be full of die cavity while extruding the first reserved blind hole (kingpin bore) and the second reserved blind hole (kingpin bore), obtain qualified blank, then, electric screw mechanism drives two drift returns, then, the voussoir clamping mechanism return of special forging equipment, then, after slide block drives patrix 26 return, last oblique top material oil cylinder ejects the blank in counterdie 27, realizes the process that integral automobile steering joint blank hot extrude extrudes kingpin bore.