CN101502855B - Reverse cold extrusion mold for car rear transversal stabilizer bar casing tube - Google Patents

Abstract

A rear transverse stabilizer rod bushing reverse cold extrusion die is disclosed, belonging to plastic forming die of metallic material and solving the problems that the current extrusion convex die has complex structure, large variation of cross section, large processing difficulty, low service life, inconvenient installation and regulation, excessive required materials of the die and high expenditure. The invention comprises a reverse extrusion concave die, an ejection device, a reverse extrusion convex die and a guide device; a punching head of the reverse extrusion convex die is sequentially divided into a punching head lower end, a working section and a fixation section, the punching head lower end is a cone, the entire working section is tooth-shaped; the diameter, the spline module and the number of teeth thereof are equal to relative parameters of the bushing to be formed; the fixation section is cylindrical; a conical clamping ring of the reverse extrusion convex die is a round table having an inner hole, the side thereof has an axial incision, and the inner hole has annular channels that are distributed equidistantly. The invention is convenient in manufacturing, installation, regulation and usage, stable and reliable in operation, wide in application range of the technology and long in service life; the die expenditure is lowered due to quite few materials required for manufacturing the convex die.

Description

Reverse cold extrusion mold for car rear transversal stabilizer bar casing tube

Technical field

The invention belongs to metal material Plastic Forming mould, be used for the production of car rear transversal stabilizer bar casing tube cold-extruded part.

Background technology

Car rear transversal stabilizer bar casing tube be have that modulus is 0.78, the number of teeth is 30～32, the internal spline cup cylindrical part of the long 30mm of surpassing of tooth,

At ratchet-shaped cup cylindrical part in the band, the lower end of currently used Back Extrusion Punches has 55 ° of cone angles, the height of parts of tooth is 14.5mm, in the back of the wide work zone of 9mm is that width is the back crack part of 8.5mm, the external diameter of back crack part than ratchet tooth at the bottom of size to reduce 0.1mm, and the bigger fillet (R15 of employing, R20) transition, the inoperative of punch partly has three grooves of 120 ° of distributions, its effect is to match with the type hole in the material returned ring, and the standing part of punch is that the upper end is big, the lower end is little and has the pyramidal structure of 15 ° of semi-cone angle.See document: " cold extrusion die design ", Yang Changshun chief editor, National Defense Industry Press, 1994:286-288.

The Back Extrusion Punches that the document is reported is the tube reducing structure, changes greatly complex structure along each cross section of punch axis, processing and manufacturing is extremely difficult, be easy to generate the stress concentration phenomenon during cold extrusion, thereby service life is short, can only be used for the little internal spline cup cylindrical part of profile length; When changing the inefficacy punch at every turn or needing repairing punch; punch, punch retainer plate and trip bolt etc. all must be disassembled; then new punch or the good punch of maintenance are installed and adjusted according to order; cause punch to be installed and adjust inconvenience; and it is many to make the die needed material of punch, the die cost height.

Summary of the invention

The invention provides a kind of rear transversal stabilizer bar casing tube reverse cold extrusion mold, solve existing extruding punch structure complexity, change greatly along each cross section of axis, the processing and manufacturing difficulty is big, service life is low, can only push short tazza cylindrical member of profile length and punch the adjustment inconvenience is installed, and it is many to make the die needed material of punch, causes the high problem of die cost.

A kind of rear transversal stabilizer bar casing tube reverse cold extrusion mold of the present invention comprises extrusion female mould, liftout attachment, Back Extrusion Punches and guider;

Described extrusion female mould is made up of lower bolster, die shoe, lower bolster, die socket, die, die foundation ring, shrink ring, outer ring, retainer ring; Die is a cylindrical shape, and die is with shrink ring outward and places the top of die socket, and shrink ring is with the outer ring outward, and the outer ring is fastened as one with die shoe by screw by retainer ring, and die shoe fastens as one with lower bolster by screw;

Described liftout attachment is made up of lower push rod and push rod, and push rod is bearing on the flange of lower push rod;

Described Back Extrusion Punches is made up of cope match-plate pattern, gasket ring, backing plate, drift, taper wheel flange, taper retainer plate; Drift clamps and is bearing on the backing plate by the taper wheel flange, and the surface, outer ring of backing plate is with gasket ring, is bearing on the lower surface of cope match-plate pattern, and gasket ring is fastened as one by screw and cope match-plate pattern; The taper wheel flange is combined as a whole by screw and gasket ring by the taper retainer plate;

Described guider is made up of guide pillars and bushes, two guide pillar and tight fits vertical with lower bolster, and two guide pin bushings are fixed on the cope match-plate pattern by screw by retainer plate, and guide pillars and bushes is slidingly matched;

It is characterized in that:

Described drift is divided into drift lower end, active section and canned paragraph successively, the total length equal diameters; The drift lower end is a circular cone, has the cone angle that equates with the rear transversal stabilizer bar casing tube endoporus bottom that is extruded; The active section axial length is more than or equal to 31mm, and total length is profile of tooth, and diameter, spline modulus and the number of teeth equate at the bottom of the inner spline gear of the diameter of active section, spline modulus and the number of teeth and sleeve pipe to be formed; Canned paragraph is cylindrical, and its length is greater than the height of taper wheel flange; The taper wheel flange is the truncated cone-shaped with endoporus, and its side to endoporus has the axial cut-outs that width is 3～4mm, and endoporus has 3 annular ditch mortises that equidistantly distribute vertically.

Described rear transversal stabilizer bar casing tube reverse cold extrusion mold is characterized in that:

Described drift lower end circular cone has 3 ° of cone angles; The annular ditch mortise that described taper wheel flange endoporus distributes vertically is wide for 2mm, deeply for 0.5mm.

The difference of the present invention and existing Back Extrusion Punches is, the punch lower end that existing document proposes is 55 ° of cone angles, it on the cone angle the wide profile of tooth work zone of 9mm, above the work zone be diameter than the work zone tooth at the bottom of the sizing reduction section of the little 0.1mm of diameter, it on the sizing reduction section inoperative section that has three groove structures of 120 ° of distributions, inoperative Duan Shangwei is cylindrical and the upper end is big, the lower end is little and have a canned paragraph that the taper shape of 15 ° of semi-cone angle is formed, complex structure, the processing and manufacturing difficulty is big, easy long-living stress concentration phenomenon during cold extrusion, thereby service life is short, only be suitable for instead squeezing short internal spline cup cylindrical member of profile length and punch installation adjustment inconvenience, and it is many to make die needed material, causes the die cost height.

In the Back Extrusion Punches of the present invention, the drift lower end has the cone angle that equates with the rear transversal stabilizer bar casing tube endoporus bottom that is extruded; The active section total length is profile of tooth, and is simple in structure, processing and manufacturing easily, and long service life, and both be fit to the anti-short internal spline cup cylindrical member of profile length of squeezing, be fit to the anti-long internal spline cup cylindrical member of profile length of squeezing again.Processing and manufacturing of the present invention, installation and adjustment are easy to use, and working stability is reliable, process application wide ranges, long service life; It is few to make the die needed material of punch, takes thereby save mould; When punch is installed, at first the taper wheel flange is put into the taper retainer plate and the taper retainer plate is connected with packing ring with screw, then drift is inserted the endoporus of taper wheel flange, again with screw-driving, make in the process that the taper retainer plate moves up at screw-driving, the horizontal component that its inner conical surface produces forces the otch of taper wheel flange side to dwindle and drift is clamped, when after changing drift and needing, adjusting to the drift maintenance, only the screw on the taper retainer plate need be unclamped a little makes the taper retainer plate move down the distance of 2～3mm, the taper wheel flange just opens automatically, just drift can be taken out, when installing once more, at first drift is inserted in the taper wheel flange, then the screw-driving on the taper retainer plate is got final product, install easy to adjust.

Description of drawings

Fig. 1 is a rear transversal stabilizer bar casing tube blank schematic diagram;

Fig. 2 A is a rear transversal stabilizer bar casing tube extrusion schematic diagram;

Fig. 2 B is the vertical view of Fig. 2 A;

Fig. 3 is an indirect-extrusion mould schematic diagram of the present invention;

Fig. 4 A is the punch structure schematic diagram among Fig. 3;

Fig. 4 B is the A-A schematic cross-section of Fig. 4 A;

Fig. 5 A is the A-A schematic cross-section of Fig. 5 B;

Fig. 5 B is the vertical view of taper wheel flange.

The specific embodiment

Fig. 1 is a rear transversal stabilizer bar casing tube blank schematic diagram to be processed, and blank is cylindrical, diameter D ₀Be 36mm.

Fig. 2 A, Fig. 2 B are the rear transversal stabilizer bar casing tube extrusion schematic diagram that utilizes backward extrusion of the present invention, inside diameter D at the bottom of the spline tooth ₁Be 26.2mm, tooth is long to be 26.5mm, and modulus is 0.78, and the number of teeth is respectively 32 (right parts) and 30 (left parts), and pressure angle is 45 °, and the bottom is 3 ° of cone angles, the sleeve pipe outer diameter D ₀Being 36 ± 0.5mm, highly is 36.5mm.

As shown in Figure 3, mould of the present invention comprises extrusion female mould, liftout attachment, Back Extrusion Punches and guider;

Extrusion female mould is made up of lower bolster 1, die shoe 4, lower bolster 5, die socket 7, die 8, die foundation ring 21, shrink ring 9, outer ring 16, retainer ring 19; Die 8 is a cylindrical shape, and the die 8 outer tops that are with shrink ring 9 and place die socket 7 are with outer ring 16 outside the shrink ring 9, and outer ring 16 is fastened as one with die shoe 4 by screw by retainer ring 19, and die shoe 4 fastens as one with lower bolster 1 by screw;

Liftout attachment is made up of lower push rod 3 and push rod 6, and push rod 6 is bearing on the flange of lower push rod 3;

Back Extrusion Punches is made up of cope match-plate pattern 10, gasket ring 11, backing plate 12, drift 13, taper wheel flange 14, taper retainer plate 15; Drift 13 clamps and is bearing on the backing plate 12 by taper wheel flange 14, and the surface, outer ring of backing plate 12 is with gasket ring 11, is bearing on the lower surface of cope match-plate pattern 10, and gasket ring 11 is fastened as one by screw and cope match-plate pattern 10; Taper wheel flange 14 is combined as a whole by screw and gasket ring 11 by taper retainer plate 15;

Described guider is made up of guide pillar 2 and guide pin bushing 17, two guide pillars and lower bolster 1 vertical and tight fit, and two guide pin bushings 17 are fixed on the cope match-plate pattern 10 by screw by retainer plate 18, and guide pillar 2 and guide pin bushing 17 are slidingly matched.

Shown in Fig. 4 A, Fig. 4 B, the drift of Back Extrusion Punches is divided into drift lower end 13-1, active section 13-2 and canned paragraph 13-3 successively, total length 95mm, and equal diameters equals inside diameter D at the bottom of the spline tooth ₁Drift lower end circular cone has 3 ° of cone angles; The active section axial length is more than or equal to 31mm, and total length is profile of tooth, and diameter, spline modulus and the number of teeth equate at the bottom of the inner spline gear of the diameter of active section, spline modulus and the number of teeth and sleeve pipe to be formed; Canned paragraph is cylindrical, and its length is greater than the height of taper wheel flange; Simple in structure, processing and manufacturing is easy, oppositely during cold extrusion, can not produce the stress concentration phenomenon, thereby greatly improved service life, and range of application is wide.

Shown in Fig. 5 A, 5B, the anti-taper wheel flange that squeezes punch is the truncated cone-shaped with endoporus, its semi-cone angle is 15 °, its height H is less than the canned paragraph length of drift 13, the side has the axial cut-outs that width is 3-4mm, endoporus has the wide 2mm that is, 3 ring-shaped grooves that equidistantly distribute of dark 0.5mm along short transverse.When the back adjustment is installed and keeped in repair to punch, only the screw on the taper retainer plate need be unclamped a little makes the taper retainer plate move down the distance of 2～3mm, the taper wheel flange just opens automatically, just drift can be taken out, when installing once more, at first drift is inserted in the taper wheel flange, then the screw-driving on the taper retainer plate is got final product, install easy to adjust.

The course of work of the present invention is: when Back Extrusion Punches and extrusion female mould are in open configuration, liftout attachment is in the lower position, Back Extrusion Punches is in upper limit position, blank shown in Figure 1 is placed in the die 8, Back Extrusion Punches is under the effect of extruder slide block, is stabiliser bar cover tube components shown in Figure 2 by drift 13 with the blank backward extrusion, backward extrusion finishes, the backhaul of extruder slide block, driving drift 13 withdraws from from sleeve pipe extrusion 20, liftout attachment ejects sleeve pipe extrusion 20 by push rod 6 from die 8, a working cycles finishes.

Claims (2)

1. a rear transversal stabilizer bar casing tube reverse cold extrusion mold comprises extrusion female mould, liftout attachment, Back Extrusion Punches and guider;

Described extrusion female mould is made up of lower bolster (1), die shoe (4), lower bolster (5), die socket (7), die (8), die foundation ring (21), shrink ring (9), outer ring (16), retainer ring (19); Die (8) is a cylindrical shape, the outer top that is with shrink ring (9) and places die socket (7) of die (8), the outer outer ring (16) that is with of shrink ring (9), outer ring (16) is fastened as one by the same die shoe of screw (4) by retainer ring (19), and die shoe (4) fastens as one by the same lower bolster of screw (1);

Described liftout attachment is made up of lower push rod (3) and push rod (6), and push rod (6) is bearing on the flange of lower push rod (3);

Described Back Extrusion Punches is made up of cope match-plate pattern (10), gasket ring (11), backing plate (12), drift (13), taper wheel flange (14), taper retainer plate (15); Drift (13) clamps and is bearing on the backing plate (12) by taper wheel flange (14), and the surface, outer ring of backing plate (12) is with gasket ring (11), is bearing on the lower surface of cope match-plate pattern (10), and gasket ring (11) is fastened as one by screw and cope match-plate pattern (10); Taper wheel flange (14) is combined as a whole by screw and gasket ring (11) by taper retainer plate (15);

Described guider is made up of guide pillar (2) and guide pin bushing (17), two guide pillar and tight fits vertical with lower bolster (1), and two guide pin bushings (17) are fixed on the cope match-plate pattern (10) by screw by retainer plate (18), and guide pillar (2) and guide pin bushing (17) are slidingly matched;

It is characterized in that:

Described drift is divided into drift lower end, active section and canned paragraph successively, the total length equal diameters; The drift lower end is a circular cone, has the cone angle that equates with the rear transversal stabilizer bar casing tube endoporus bottom that is extruded; The active section axial length is more than or equal to 31mm, and total length is profile of tooth, and diameter, spline modulus and the number of teeth equate at the bottom of the inner spline gear of the diameter of active section, spline modulus and the number of teeth and sleeve pipe to be formed; Canned paragraph is cylindrical, and its length is greater than the height of taper wheel flange; The taper wheel flange is the truncated cone-shaped with endoporus, and its side to endoporus has the axial cut-outs that width is 3～4mm, and endoporus has 3 annular ditch mortises that equidistantly distribute vertically.

2. rear transversal stabilizer bar casing tube reverse cold extrusion mold as claimed in claim 1 is characterized in that:

Described drift lower end circular cone has 3 ° of cone angles; The annular ditch mortise that described taper wheel flange endoporus distributes vertically is wide for 2mm, deeply for 0.5mm.

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