CN1066357C

CN1066357C - Small diemter thin-wall metal shaped-pipe forming method

Info

Publication number: CN1066357C
Application number: CN97117095A
Authority: CN
Inventors: 曾绍谦
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-10-22
Filing date: 1997-10-22
Publication date: 2001-05-30
Anticipated expiration: 2017-10-22
Also published as: CN1214973A

Abstract

The present invention relates to a shaping method of small-diameter thin-wall metal rippled pipes. The method comprises the following steps: preparing a plastic bag in the blank hole of a metal blank pipe; filling mercury in the plastic bag; sealing the plastic bag to form a plastic mould core member; covering the blank pipe filled with the mould cover member by using a fractal mould prefabricated with the form body of the rippled pipe; pressing the mould core member in the blank hole from top to bottom by using a pile top to expand the blank pipe from interior to exterior until the form body of the prefabricated mould wall in the fractal mould is formed; withdrawing the pile top and the fractal mould; taking out the mould core member from the formed pipe hole to obtain the required formed pipe with the form body of the rippled pipe.

Description

The method of forming of small-bore thin wall metal floral tube

The invention provides a kind of method of forming of small-bore thin wall metal floral tube, particularly adorn the path thin-walled shape metal tube of body at the tool art, cause the undesired drawback of subsiding of hole wall when being easy to mechanical-moulded construction, and then in the pore of its metal pipe, being set up one has plasticity and be beneficial to the core piece of taking out in the moulding hole wall, and by this core piece as by the medium that conducts the forging and pressing active force in the pore toward the pipe wall outward so that the metal pipe from inside to outside bulge forming be the floral tube profile of somatotype die cavity type body of periphery.

In the prior art, desire to make the metal tube processing method of required profile type body, have such as utilization take out method for making, casting and or forging method or the like, which kind of processing method the dealer when select using, normally according to desire to make demand conditions such as the profile type body of metal tube and intensity and select for use, certainly in these existing processing methods, overcritical because of on the different qualities of processing method separately and the genetic prerequisite also arranged, and limited the artistic type body that processed material desire makes and the range of application of intensity.

Lift as desire to make in the present invention the category of metal floral tube, be meant that the method for utilizing moulding makes the pipe wall type body just like artistic profile, its tube wall profile varying is to comprise together the rise and fall plastotype of line body of inside and outside wall to change, this variation is not the continuity that is subject to tube wall ring week, even also be the decorations wall type body of spill or convex independently separately, in the method for forming of the present invention, also can be made by simple and easy; After making floral tube type body simultaneously, has higher body intensity, also required for the present invention asking.

At the very broad demand of this forming metal floral tube type body variable quantity, and the demand of must the tool higher intensity of moulding floral tube, if adopt existing shaping operation method, be difficult to reach.

Though the method for making of taking out commonly used is all the metal pipe is placed mould, is shaped to the body profile of demand again through the pull running.But the body profile that this method is made, the continuity line body that the body of only having is axial is difficult to have on the moulding body line body of independently recessed or convex, so the type body of machined object changes the restriction that promptly is subjected to designization, is its shortcoming place.

Other knows that casting commonly used is that metal melting is become aqueous, and adopts the method for directly casting in the die cavity of demand type body, or adopts another kind of centre spinning with core rod, molten metal is cast the floral tube of demand line body.But for pipe fitting, though this method be easy to make can molding the pipe fitting that changes of multiple line body, but the intensity of the moulding pipe fitting of making is lower, and consider the smoothness of liquation runner when casting, therefore made tube wall is thicker, and the thing type that is not suitable for having art decorations pipes such as the stationery of strength demand and light, thin condition demands such as path light wall pipe or gift is made.

Know again, forging method commonly used is to comprise forge hot and cold forging two big categories, wherein the intensity of the made thing of forge hot is low than normal temperature cold forging person, and at pipe, its forging and pressing action direction all is to be applied to the inwall direction by outer wall, need furnish core rod again with strong hole wall in pore, be to cause the puzzlement that core rod is difficult to trip out behind the forging type.Perhaps some dealer can think when utilizing the fashion of extrusion of knowing of swaging (ROTARYSWAGER), in pore, need not to furnish core rod, can avoid being difficult to the puzzlement of molding, but this method and be not suitable for the metal thin-wall type pipe fitting that very easily deform of tube wall below 0.3mm and use.For the forging type of desiring to form independent decorations bodies (the grape graining shown in Figure 1) on the body, adopt the processing mode of the extruding of swaging to make in addition as the present invention.

At above-mentioned background, path thin wall type metal embryonic tube is shaped to artistic floral tube type body, and must have higher-strength the time, be to belong to the forming technique that is difficult to reach on prior art with the coexistence of independent and continuous line body.So:

Purpose of the present invention promptly is installing one core piece in the pore of path thin-walled shape metal pipe, utilize core piece to have the plasticity of high deformation energy, and the principle that in the sealing pore, is not subtracted by pile crown when extruding forging and pressing energy, short forging and pressing active force conversion with pile crown is transmitted into the active force that expands that squeezes to the base wall, so that allow the base wall become artistic floral tube profile type body on the peripheral die cavity by interior bulge forming outward, supply with by this such as stationery, the bigger technical use of formed product of variable quantity of demands such as gift art decorations pipe profile type body, so that when improving with the pipe artistic shape, on actual manufacturing operation,, improve the moulding manufacturing technology of the tubular object of best quality eventually by the simple and easy feasibility of making.

The present invention is that the technical scheme of being taked that achieves the above object is: a kind of method of forming of small-bore thin wall metal floral tube, it utilizes a core piece, one has been pre-formed branch pattern and another pile crown that can apply forging force of dividing half-and-half the pattern cave is carried out to type processing to path thin-wall metal pipe, it is characterized in that, at first, the metal pipe is placed double die cavity of the branch pattern of matched moulds, then shape and the volume according to the pore of metal pipe produces a plastic bag, then plastic bag is put into pore and subsequently plastic bag is sealed and formed the core piece of plastically deformable at the plastic bag liquid mercury of packing into, from top to bottom the core piece in the pore is exerted pressure by pile crown subsequently, thereby make core piece distortion and thereby make its by interior toward the other places even extrusion tube blank wall, the result impels the pipe wall to meet to divide half-and-half the interior profile ground in pattern cave to be out of shape.

Feature of the present invention also is, when make the finished product floral tube in minute pattern after, removes out minute pattern and pile crown according to priority, then takes out described core piece from the moulding pore.

In the present invention, using core piece is an important techniques key, wherein utilize plastic cement to make plastic bag, making the sheath that becomes core piece, is that mat is reinvented the plasticity that glue has high deformation energy, so that can be bearing that forging and pressing institutes transmits during the crowded bloated active force that arrives, can fully closely paste and touch on the embryonic tube hole wall, and can be stable load with mercury, be difficult for breaking, and then be beneficial to transmit and squeeze the active force and make the pipe stress and deformation become the carrying out of set floral tube profile type body of expanding.

In plastic bag, carry dress mercury, make the inner bag that becomes core piece, be to rely on mercury for support to present aqueous under normal conditions and itself have the material of high specific gravity and high-penetrability, so that the crowded active force of putting outside the basipetal forging and pressing of pile crown being converted to around the base wall that expands, and then be beneficial to the carrying out of impelling the base wall to be become the processing and forming operation of set floral tube profile type body by crowded bulging.

In pore, utilize the pile crown forging and pressing to squeeze when expanding core piece, it is the principle that material does not subtract in the mat pore inner sealing space, impel the mercury of high specific gravity and tool high-penetrability, can coexist with plastic bag one and squeeze the base wall that expands in the pore from inside to outside, and after the machining of bulge forming, but the also plasticity of mat core piece, and in the moulding hole wall, take out core piece, improve the benefit that it can be repeated to use.

Technical scheme of the present invention is particularly useful for such as demands such as stationery, gifts the path thin-wall pipe being processed into the occasion of art decorations cast body, and is easy, cost is low, practical value is high.

For the present invention is described in detail in detail, please refer to following accompanying drawing and cooperate embodiment to illustrate in detail as the back:

Fig. 1: be that the present invention is the schematic perspective view of floral tube with the metal tube blank molding;

Fig. 2: be in the method for making of the present invention with ornaments plastic band in the pipe and the default schematic perspective view that divides pattern;

Fig. 3: be in plastic bag, to pour into mercury in the method for making of the present invention and divide the pattern cover to close the schematic perspective view of blank;

Fig. 4: be the cut-away view of in pore, having made core piece in the method for making of the present invention and having treated the pile crown suppressing action;

Fig. 5: be the cut-away view that following lamination shoe makes formation of tubes in the method for making of the present invention;

Fig. 6: be the cut-away view of recessing pile crown in the method for making of the present invention, dividing taking-up moulding floral tube spare after pattern and the core piece.

First sight is shown in Figure 1, is that the metal pipe 1 of taking the thin-walled shape of less caliber is made base material during the invention process, and then utilizes the method for forming of the present invention, makes the floral tube 2 type bodies of making tool art continous way or free-standing fluctuating profile.In the cited enforcement legend of desiring to make floral tube 2 profile type bodies of the present invention (as Fig. 1), the variation of its profile line body just non-so and limited, in fact tube wall is shaped to such as continuously and the pipe fitting profile of other Idiotype body of independent concave-convex decoration, all can utilizes method for making of the present invention and make easily.

Method for making of the present invention is to comprise: utilize existing mold making technology to be pre-formed a pair of the have die cavity 43 of double floral tube body and 44 branch pattern 41 and 42 (as shown in Figure 2), metal pipe 1 is placed

double die cavity

43 and 44 of matched moulds (cooperating shown in Figure 3), again according to pore 10 shapes and the volume of pipe 1, produce the plastic bag 31 that to insert in the pore 10 in advance, plastic bag 31 is inserted (as shown in Figure 2) in the pore 10, and in plastic bag 31, carry and adorn liquid mercury 32 (as shown in Figure 3), utilize rope 33 to seal again, this moment the plastic bag 31 in the pore 10, because of being subjected to mercury 32 hyperbaric influences, fully the pipe wall 11 in the pore 10 is closely being pasted, forming the plastic core piece 3 (cooperating shown in Figure 4) that has deformation energy in the pore 10;

Utilize a type physical efficiency to be close to the pile crown 5 (as shown in Figure 4) of pipe wall 11 leading edges in the pore 10, make from top to bottom the core piece in the pore 10 3 is exerted pressure (as shown in Figure 5), the high specific gravity of the plasticity of mat plastic bag 31 and mercury 32 and penetrability, impel the core piece 3 can be in bearing after stake presses, be converted into the deformation energy (promptly squeezing the active force that bulging becomes) that evenly squeezes expand tube base wall 11 outward by interior, make pipe wall 11 be shaped to double die cavity 43 in

branch pattern

41 and 42 and 44 profile type body (as shown in Figure 5);

After in mould, making the profile type body of floral tube 2, withdraw

branch pattern

41,42 and pile crown 5 in regular turn, then in moulding pore 21, take out core piece 3, and then represent moulding floral tube 2 finished products (as shown in Figure 6).

These floral tube 2 manufactured goods, can use for the metal shaft of a writing brush or be utilized by demand occasions such as the decorations of the metal in gift pipes as stationery, the type body of certain its profile, can make the double die cavity type body that divides pattern on demand and earlier, make when processing and forming, only need to carry the die cavity that the pipe 1 that is provided with core piece 3 places matched moulds, can press the metal floral tube of the required type body of the type of being expanded into, its convenience is high, answers accessory that the very usability of height is arranged on the industry.

Claims

1, a kind of method of forming of small-bore thin wall metal floral tube, it utilizes a core piece (3), one has been pre-formed and has divided half-and-half pattern cave (43,44) branch pattern (41,42) and another pile crown (5) that can apply forging force path thin-wall metal pipe (1) is carried out processing and forming, it is characterized in that, at first, metal pipe (1) is placed the branch pattern (41 of matched moulds, 42) double die cavity (43,44) in, then shape and the volume according to the pore (10) of metal pipe (1) produces a plastic bag (31), then plastic bag (31) is put into pore (10) and subsequently plastic bag (31) is sealed and formed the core piece (3) of plastically deformable at plastic bag (31) the liquid mercury (32) of packing into, from top to bottom the core piece (3) in the pore (10) is exerted pressure by pile crown (5) subsequently, thereby make core piece (3) distortion and thereby make its by interior toward the other places even extrusion tube blank wall (11), the result impels pipe wall (11) to meet to divide half-and-half pattern cave (43,44) interior profile ground distortion.

2, the method for forming of small-bore thin wall metal floral tube as claimed in claim 1, it is characterized in that, after in a minute pattern (41,42), making finished product floral tube (2), remove out a minute pattern (41,42) and pile crown (5) according to priority, then from moulding pore (21), take out described core piece (3).