CN104014607A - Method and mold for continuously and gradually extruding high-rib profile - Google Patents

Abstract

The invention provides a method and mold for continuously and gradually extruding a high-rib profile. The mold comprises an upper mold and a lower mold. A central position of the upper mold is provided with a deflector hole; a front end surface of the lower mold is provided with a material dodging hole; the upper part of the material dodging hole is provided with a plurality of grooves and teeth which are distributed alternatively side by side; gaps are provided between the teeth and the bottom surface of the material dodging hole; the plurality of grooves and teeth extend to the back end surface of the lower mold; the height of the grooves increases linearly from the teeth end of the teeth until the height is identical to that of the high-rib teeth of the high-rib profile; edges of end parts of the teeth extend obliquely from the top of the material dodging hole and from the top to bottom; end parts of the teeth are in a truncated cone-shaped cleaver head structure; and inlet ends of the grooves are provided with working bands. A gradually changing structure is adopted by the grooves and the teeth; the teeth ends are provided with cleaver head, so that gradual shaping and radial flowing of the metal are realized in an extrusion and deformation process. Meanwhile, the length of the suspension arm is reduced by a half; and the service life of the mold is increased qualitatively.

Description

Method and the mould of high muscle class section bar pushed in continuous gradation

Technical field

The invention belongs to section bar manufacture field, be specifically related to method and mould that high muscle class section bar is pushed in continuous gradation.

Background technology

High muscle class section bar is indispensable part in the industries such as machinery, electronics, the effect that mainly contains heat radiation and strengthen.Present stage, the general method of extruding that adopts was carried out production and preparation.Extruding is produced has a series of advantage, as high in production efficiency, material inside organization is fine and close, mechanical property good, save material, heat-transfer effect is good etc.

But still there is certain difficulty in the production for high muscle class section bar, because the rib of this class section bar is all very high and distribute closelyer, in extrusion process, the bracketed part of counterdie is very easily impaired, and the service life of mould is very low, production cost is very high, is difficult to realize large-scale batch production.

Summary of the invention

For Shortcomings in prior art, the invention provides method and mould that high muscle class section bar is pushed in a kind of continuous gradation.

The present invention realizes above-mentioned technical purpose by following technological means.

The mould of high muscle class section bar is pushed in continuous gradation, comprise upper die and lower die, the center of described patrix has pod apertures, the rear end face of described patrix with on the front end face of counterdie, there is respectively projection and the depression that shape conforms to, the centre position of the front end face of described counterdie is provided with and pod apertures shape, hole is expected in allowing that size is identical, the described top in material hole that allows is a plurality of grooves and the tooth that interval distributes side by side, described tooth and allow material hole bottom surface between there is space, described a plurality of groove and tooth extend to the rear end face of described counterdie, and the gradual change from the increment of tooth of described groove height is increased, until identical with the height of the high muscle tooth of described high muscle class section bar, the edge of the end of described tooth is from allowing material top, hole, tilt to extend from top to bottom, the end of described tooth be truncated cone shape split stub bar structure, arrival end at groove is provided with work band.

Preferably, described tooth with make the height in space and the thickness of the substrate of described high muscle class section bar between the bottom surface in material hole identical.

Preferably, the end of described tooth is truncated cone shape splits stub bar structure.

The method of high muscle class section bar is pushed in continuous gradation, it is characterized in that, comprises the following steps:

A. strand is carried out to homogenizing annealing processing;

B. by blank heating to 480～500 ℃, recipient is heated to 440～460 ℃, and mold heated to 460～480 ℃, push;

C. blank pod apertures through patrix under the effect of dummy block completes predeformation, metal after predeformation is at the tooth of edge tilt and be positioned under the effect of splitting stub bar of increment, realize local deformation and Radial Flow, begin to take shape high muscle tooth, carrying out along with extruding, the length of the high muscle tooth forming increases gradually, and when the length of high muscle tooth reaches the height of design, blank is expected position that the bottom surface in hole the contacts substrate portion that is shaped with allowing;

D. topping and afterbody, carry out Quenching Treatment and artificial aging and process, by the actual size intercepting of workpiece.

Preferably, in described step b, by blank heating to 500 ℃, recipient is heated to 460 ℃, mold heated to 480 ℃.

The mould of high muscle class section bar is pushed in continuous gradation of the present invention, reasonably utilized the rigidity translation of metal, designed cleverly the structure of groove and the tooth of gradual change, at increment, designed and split stub bar, make metal realize gradual change shaping and Radial Flow, be conducive to high muscle shaping of teeth.Meanwhile, the structure of groove and tooth makes the jib-length of mould reduce half, has improved greatly the force-bearing situation of mould bracketed part, has obtained the raising of matter the service life of mould.

Accompanying drawing explanation

Fig. 1 is the sectional view of described high muscle class section bar.

Fig. 2 is the installation diagram that the mould of high muscle class section bar is pushed in continuous gradation of the present invention.

Fig. 3 is the front view of patrix of the present invention.

Fig. 4 is that the A-A of patrix of the present invention is to view.

Fig. 5 is the front view of counterdie of the present invention.

Fig. 6 is that the B-B of counterdie of the present invention is to view.

Fig. 7 is that the C-C of counterdie of the present invention is to view.

Description of reference numerals is as follows:

1-substrate, the high muscle tooth of 2-, 3-patrix, 4-counterdie, 31-pod apertures, 41-groove, 42-tooth, 43-splits stub bar, the 44-band of working, 45-allows material hole.

The specific embodiment

Below in conjunction with accompanying drawing and specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to this.

The structure of high muscle class section bar as shown in Figure 1, is comprised of substrate 1 and high muscle tooth 2.The mould that high muscle class section bar is pushed in continuous gradation of the present invention as shown in Figure 2, comprises patrix 3 and counterdie 4, on the front end face of the rear end face of described patrix 3 and counterdie 4, has respectively projection and the depression that shape conforms to.As shown in Figure 3, Figure 4, the center of described patrix 3 has pod apertures 31.As shown in Fig. 5, Fig. 6, Fig. 7, the centre position of the front end face of described counterdie 4 is provided with pod apertures 31 shapes, identical the allowing of size expects hole 45, the described top in material hole 45 that allows is a plurality of grooves 41 and the tooth 42 that interval distributes side by side, described tooth 42 and allow and have space between the bottom surface in material hole 45, described tooth expects that the thickness of the height in space between the bottom surface in hole 45 and the substrate 1 of described high muscle class section bar is identical with allowing.Described a plurality of groove 41 and tooth 42 extend to the rear end face of described counterdie 4, and the 41 height gradual changes from the increment of tooth 42 of described groove increase until after identical with the height of the high muscle tooth 2 of described high muscle class section bar, with the height of high muscle tooth 2, extend to again the rear end face of counterdie 4, the edge of the end of described tooth 42 is from allowing material 45 tops, hole, inclination from top to bottom extend, the end of described tooth 42 be truncated cone shape split stub bar 43 structures, at the arrival end of groove 41, be provided with work band 44.

In the process of extrusion molding, metal is predeformation under the effect of patrix 3 pod apertures 31, owing to having on the front end face at counterdie 4 to allow, expect hole 45, because the edge of the end of tooth 42 tilts, metal foot after predeformation does not temporarily participate in distortion, and top is under the effect of splitting stub bar 43 of tooth ends, metal charge is split to both sides, owing to splitting stub bar 43 and the work double action with 44, the metal of being rived can shift to the direction of groove 41, realize the Radial Flow of metal, this process shows as the partial plastic forming of high muscle part.Carrying out along with extruding, basicly stable to the metal of Radial Flow by work band 44 in advance, under the promotion of follow-up metal further to radially doing rigidity translation, the groove 41 of offering on counterdie 4 just in time can hold the metal of rigidity translation, before high muscle part is soon shaped completely, allow and expect that the metal in hole 45 also contacts with the nib of below, substrate 1 part is finally shaped.

Take 6063 aluminium alloys as example, and the mould that utilizes continuous gradation of the present invention to push high muscle class section bar is manufactured the method for high muscle class section bar, specific as follows:

A. aluminium alloy strand is carried out to homogenizing annealing processing, technological parameter is as follows: annealing temperature is 560 ℃, and insulation 6h, is cooled to 250 ℃ with powerful air-flow afterwards, and cooling velocity is 350～500 ℃/h, stops afterwards 0.5h, then water is cooled to 50 ℃.

B. by blank heating to 500 ℃, recipient is heated to 460 ℃, and mold heated to 480 ℃, pushes.

C. blank pod apertures 31 through patrix 3 under the effect of dummy block completes predeformation, metal after predeformation is at the tooth 42 of edge tilt and be positioned under the effect of splitting stub bar 43 of increment, realize local deformation and Radial Flow, begin to take shape high muscle tooth 2, carrying out along with extruding, the length of the high muscle tooth 2 forming increases gradually, and when the length of high muscle tooth 2 reaches the height of design, blank is expected position that the bottom surface in hole 45 contacts substrate 1 part that is shaped with allowing.

D. topping and afterbody, carry out Quenching Treatment and artificial aging and process.Press the actual size intercepting of workpiece.

The present invention adopts the mould of special construction to prepare the method for high muscle class section bar, makes metal realize progressive deformation and Radial Flow, has well solved the difficult problem being shaped of high muscle tooth 2.Meanwhile, the bracketed part of mould with originally compared and shortened half, stressed being greatly improved of bracketed part of mould, has had the lifting of matter die life, is particularly suitable for extruding high muscle class section bar.

Described embodiment is preferred embodiment of the present invention; but the present invention is not limited to above-mentioned embodiment; in the situation that not deviating from flesh and blood of the present invention, any apparent improvement, replacement or modification that those skilled in the art can make all belong to protection scope of the present invention.

Claims (5)

1. the mould of high muscle class section bar is pushed in continuous gradation, comprise patrix (3) and counterdie (4), the center of described patrix (3) has pod apertures (31), the centre position of the front end face of described counterdie (4) is provided with and pod apertures (31) shape, hole (45) is expected in allowing that size is identical, the described top in material hole (45) that allows is a plurality of grooves (41) and the tooth that interval distributes side by side, described tooth and allow material hole (45) bottom surface between there is space, described a plurality of groove (41) and tooth extend to the rear end face of described counterdie (4), and the gradual change from the increment of tooth of described groove (41) height is increased, until identical with the height of the high muscle tooth (2) of described high muscle class section bar, the edge of the end of described tooth is from allowing material top, hole (45), tilt to extend from top to bottom, arrival end at groove (41) is provided with work band (44).

2. the mould of high muscle class section bar is pushed in continuous gradation according to claim 1, it is characterized in that, described tooth with make the height in space and the thickness of the substrate (1) of described high muscle class section bar between the bottom surface in material hole (45) identical.

3. the mould of high muscle class section bar is pushed in continuous gradation according to claim 1, it is characterized in that, the end of described tooth is truncated cone shape splits stub bar (43) structure.

4. the method for high muscle class section bar is pushed in continuous gradation, it is characterized in that, comprises the following steps:

A. strand is carried out to homogenizing annealing processing;

B. by blank heating to 480～500 ℃, recipient is heated to 440～460 ℃, and mold heated to 460～480 ℃, push;

C. blank pod apertures (31) through patrix (3) under the effect of dummy block completes predeformation, metal after predeformation is at the tooth of edge tilt and be positioned under the effect of splitting stub bar (43) of increment, realize local deformation and Radial Flow, begin to take shape high muscle tooth (2), carrying out along with extruding, the length of the high muscle tooth (2) forming increases gradually, when the length of high muscle tooth (2) reaches the height of design, blank with allow the position that contacts, bottom surface in material hole (45) substrate (1) part that is shaped;

D. topping and afterbody, carry out Quenching Treatment and artificial aging and process, by the actual size intercepting of workpiece.

5. the method for high muscle class section bar is pushed in continuous gradation according to claim 4, it is characterized in that, in described step b, by blank heating to 500 ℃, recipient is heated to 460 ℃, mold heated to 480 ℃.