CN109332411A - A kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times - Google Patents
A kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times Download PDFInfo
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- CN109332411A CN109332411A CN201811370493.2A CN201811370493A CN109332411A CN 109332411 A CN109332411 A CN 109332411A CN 201811370493 A CN201811370493 A CN 201811370493A CN 109332411 A CN109332411 A CN 109332411A
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- blank
- arc section
- die holder
- cavity die
- forming device
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
- B21C35/02—Removing or drawing-off work
Abstract
The present invention relates to a kind of crowded pipe forming devices squeezed for non-ferrous metal continuous several times, including formed punch, upper cavity die, lower cavity die and type core；Upper cavity die has the first hollow cavity, and the first hollow cavity includes formed punch fit circular arc section be arranged according to nonferrous metals difference extrusion ratio at least two sections and coaxial blank squeezes arc section；The second hollow cavity is offered on lower cavity die, the second hollow cavity includes blank forming arc section, tapering transition arc section and equal diameter through-hole arc section；The inside that type core is placed in the second hollow cavity is shaped the hollow portion of pipe fitting.The present invention is unidirectional continuously extruded by a time, large deformation of blank is resolved into small deformation two or more times to improve the uniform thinning effect of pipe fitting crystal grain, and in forming process, using rotating core, the extruding force of extrusion process will be reduced, and further improve pipe fitting crystal grain carefully even property while ensure that the quality of product.
Description
Technical field
The invention belongs to the fields of extrusion molding, and in particular to a kind of crowded pipe forming device is particularly suitable for for coloured
Metal such as magnesium alloy bar carries out the crowded pipe forming device of continuous several times extruding.
Background technique
Non-ferrous metal such as magnesium alloy is conductive, thermal conductivity, electromagnetic wave shielding, while functional, specific strength and ratio
Rigidity is high, and damping property is good, machining and good dimension stability, easily recycles, the advantages that being good for the environment.With automobile, aviation,
The light-weighted demand for development of the industry such as electronics and transport, magnesium alloy will be used wider and wider.Magnesium alloy is divided into casting magnesium and closes
Gold and wrought magnesium alloy, the wider cast magnesium alloy of application, as-cast structure coarse grains, mechanical property are lower at present.
Since magnesium is the metal of close-packed hexagonal structure, slip system is few under room temperature and low temperature, theoretically only 3 slidings
System actually only has 1 slip system moving when deformation, and plasticity is relatively low, is easy brittle failure, and cold-forming property is bad.In order to mention
Its high mechanical property, thinning microstructure is relatively good approach.It can not only be improved by heat treatment come Refining Mg Alloy crystal grain
Its intensity also can be improved in its plasticity.Crystal grain refinement is always the hot issue of materials science research, according to famous Hell-
Petch formula, polycrystal yield strength is greatly increased with the reduction of crystallite dimension, and elongation percentage also significantly improves, and is ideal
Material reinforcement mode.Being squeezed and deformed is exactly one of more satisfactory thinning microstructure, improves the mode of texturing of its mechanical property.
Its mechanical property of part of extrusion production is much higher compared with what casting produced, and surface smoothness is high, can be used for automobile
Load-bearing part such as sitting frame, chassis frame and vehicle window frame etc..The development of China's deformed magnesium alloy material and exploitation are still at an early stage,
Lack high-performance magnesium-alloy plate, stick and profile.Therefore, the deformed magnesium alloy material of function admirable, multi-size is researched and developed
Seem particularly significant.
The unidirectionally extruded mode of texturing of the magnesium alloy used at present in experimental study field is usually single equal channel angle
Squeeze and single variable conduit angle squeeze, be all using the plastic deformation processing method of big shear-deformable refinement crystal grain, i.e., will be by
The magnesium alloy blank of extruding, the unidirectional isometrical squeezing passage by bending to an angle of 90 degrees on extrusion die are squeezed, and magnesium alloy is made
Blank presses to the other end under the pressure of a pressure ram, by one end of mold squeezing passage, logical by unidirectional a time etc.
Road corner extrusion depanning, or depanning is squeezed by unidirectional a time variable conduit angle, make magnesium alloy blank by unidirectional isometrical
When 90 degree of corners of angle squeezing passage, by shear-deformable, by magnesium alloy grains, the magnesium alloy materials being extruded are improved
Mechanical property.
Since the fashion of extrusion of Equal Channel Angular Pressing is only the fashion of extrusion in a unidirectional isometrical channel, multiple tracks need to be passed through
Secondary extruding can be by magnesium alloy grains to smaller size.Therefore, have the following insufficient: first, blank needs logical
It crosses pre-extrusion deformation and carries out preliminary refinement crystal grain, therefore process is more, equipment, energy consumption are big, at high cost；Second, using multiple tracks
Secondary extrusion process, same process is more, and production efficiency is low, high production cost；Extrusion time per pass is relatively long, production effect
Rate is low, if improving unidirectionally extruded speed, product quality can be made to decline.Therefore, need to improve production efficiency in industrialized production
In the case of, channel angle extrusion technique there will naturally be deficiency, and industrialized production promotes and applies extremely difficult.
Since variable conduit angle squeezes its main feature is that added certain extrusion ratio on the basis of Equal Channel Angular Pressing, improve
The grain refining effect of magnesium alloy；But magnesium alloy blank by variable conduit angle when being squeezed, it may appear that banded structure, crystal grain
Uniformity be deteriorated, reduce the mechanical property of magnesium alloy, magnesium alloy is just easy to crack.
Current Equal Channel Angular Pressing and variable conduit angle, which squeeze, all to have to complete by the gradation extruding of multi-pass,
And from major diameter, gradually shunting time is expressed to minor diameter, often changes a diameter just necessary demoulding, mold changing, and program is more and complicated,
It had not only wasted time in actual production but also waste of resource；In addition because extrusion ratio frequently can lead to greatly very much the generation of crackle；It influences
Product quality.
Summary of the invention
In consideration of it, the object of the present invention is to provide a kind of crowded pipes squeezed for non-ferrous metal continuous several times into shape dress
It sets, it is intended to which overcoming needs multi-pass gradation extruding could be by magnesium alloy grains to smaller size in existing magnesium alloy compressional deformation
Defect and solve that extrusion speed in magnesium alloy compressional deformation is slow, extrusion ratio unreasonable distribution leads to that production efficiency is low, product
The problems such as quality declines.
In order to achieve the above object of the invention, and then the technical solution taken is as follows:
A kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times, comprising: upper die holder, lower die holder and be installed on
The guide sleeve and guide post of upper and lower die holder, which is characterized in that the crowded pipe forming device further includes having:
Formed punch is fixed on the upper die holder and mobile with the upper die holder, for squeezing nonferrous metals；
Upper cavity die, positioned at the lower section of the formed punch, and the upper cavity die have one matched with the formed punch it is first hollow
Cavity, the first hollow cavity include formed punch fit circular arc section be arranged according to nonferrous metals difference extrusion ratio to
Few two sections and coaxial blank extruding arc section, and its diameter gradually becomes at least two sections of blank extruding arc section from top to bottom
It is small；
Lower cavity die is fixed on the lower die holder and is located at the lower section of the upper cavity die and mutually fixes with upper cavity die, in addition,
A second hollow cavity coaxial with the first hollow cavity is also provided on the lower cavity die, the second hollow cavity includes base
Material forming arc section, tapering transition arc section and equal diameter through-hole arc section, wherein the blank forming arc section and blank exist
It is adjacent to completely during forming pipe fitting, there are gaps between the pipe fitting after the equal diameter through-hole arc section and blank forming；
Type core, setting on the lower die holder and are placed in the inside of the described second hollow cavity, are used for and the lower cavity die
Match the hollow portion for being shaped pipe fitting.
Preferably, the inside of the lower die holder is additionally provided with gear set and driving for driving the type core positive and negative rotation
The screw rod of the gear set positive and negative rotation, wherein the gear set includes central gear, transition gear and connection gear, it is described in
Heart gear is arranged in the inside of the lower die holder, the top of the central gear be equipped with the type core and the central gear,
The screw rod is still to keep mutually nibbling with the connection gear while being meshed in order between transition gear and connection gear
It closes, to drive gear set to move by the driving effect of screw rod, and then realizes the type core rotation on central gear.
More preferably, the screw rod is connected with the first hydraulic cylinder being arranged in the lower die holder, meanwhile, first liquid
Compressing cylinder is connected by the oil circuit being connected to the second hydraulic cylinder, and second hydraulic cylinder is connected with the upper die holder,
To by upper die holder move up and down promote its second hydraulic cylinder move after again by second hydraulic cylinder promote its first
The movement of hydraulic cylinder, and then its screw rod is driven to realize the movement of left and right directions, finally realize the rotating forward of the driving core of gear set
Or reversion.
Preferably, being separately provided for adding blank in blank extrusion process on the upper cavity die, lower cavity die
The heating rod of heat, to reach optimal deformation temperature in blank extrusion process.
More preferably, the crowded pipe forming device further includes having ejector, and the ejector includes the lower top fixed in order
Material portion, middle interconnecting piece and upper liftout portion, the outside of the lower die holder upper surface is run through and is extend out in the bottom knockout portion, described
Middle interconnecting piece is that the disk connector of a hollow form is placed on the lower die holder, and the disk connector has radially
Direction and towards several extensions of its disk connector internal stretch, the extension, which is placed in, is provided with the lower cavity die bottom
U-lag in simultaneously the end of the extension also mutually fixed with liftout portion thereon, the upper liftout portion runs through and extend out to described
The outside of lower cavity die upper surface, and rushing of being arranged at the top having in the upper cavity die is extended at the top of liftout portion thereon
On the lower end surface of head fit circular arc section.
More preferably, the bottom of the upper cavity die be provided with the rotation stop key for preventing the rotation of cavity plate thereon and with the lower cavity die
The boss of location fit, correspondingly, offering rotation stop key groove and boss deep gouge at the top of the lower cavity die.
More preferably, the bottom knockout portion be several equally distributed first vertical bars and the top of first vertical bar with
The disk connector is mutually fixed, the upper liftout portion be several equally distributed second vertical bars and second vertical bar with
The quantity of the extension matches.
More preferably, it is provided on the oil circuit for connecting first hydraulic cylinder and the second hydraulic cylinder and adjusts the type core
The throttle valve of rotation speed.
It more preferably, include to be provided with casing on the outside of bottom knockout portion inside the lower die holder, and in the gear
Thrust ball bearing is provided between group and the lower die holder.
Beneficial effects of the present invention: crowded pipe forming device of the invention is using the use of upper cavity die inside according to non-ferrous metal
At least two sections of the blank extruding arc section that blank is arranged different extrusion ratios and is formed is continuous to nonferrous metals realization more
Secondary extrusion deformation improves the uniform thinning effect of crystal grain of non-ferrous metal；The present invention utilizes the cooperation of hydraulic cylinder and screw rod, can
The gear set rotation being mounted on inside lower die holder is driven, and then drives the type core being mounted in lower cavity die in blank forming process
Rotation is kept, the rotation of type core has the advantage that since type core rotates in forming process, and blank shapes the inner surface of pipe fitting
Pivoting friction is being generated in forming process between the type core of rotation, the presence of frictional force can be such that the inner wall of blank is sheared,
It generates shear-deformable.Therefore, the rotation of type core will significantly improve the uniformity of crystal grain, make the mechanical property of non-ferrous metal drip molding
It can be remarkably reinforced, while subtract the generation of crackle in forming process；The present invention is in order to having blank in forming process
There is suitable deformation temperature, using the heating rod being mounted on inside upper cavity die and lower cavity die；The present invention utilizes upper die holder band
Dynamic formed punch moves up and down, and collocation carrys out the rotation of driving core using the driving structure of hydraulic cylinder and screw rod, so that blank is logical
The unidirectionally extruded forming that pipe fitting can be completed of a time is crossed, squeezes pipe forming device knot while improving the production efficiency and entirely
Structure is simple.
In conclusion the present invention is resolved into a large deformation of blank at least by the unidirectional continuously extruded of a time
Small deformation two or more times makes its crystal grain refinement to lesser size, tissue is more to improve the grain refining effect of blank
Add uniformly；In forming process, using the type core of rotation, product even tissue can further improve while reducing extruding force
The effect of refinement and the generation for reducing crackle in forming process, ensure that the quality of product.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of three-dimensional structure diagram of the crowded pipe forming device squeezed for non-ferrous metal continuous several times of the present invention；
Fig. 2 is the structural schematic diagram at the top of upper cavity die involved in Fig. 1；
Fig. 3 is the structural schematic diagram of upper cavity die bottom involved in Fig. 1；
Fig. 4 is the internal view of upper cavity die involved in Fig. 1；
Fig. 5 is the structural schematic diagram at the top of lower cavity die involved in Fig. 1；
Fig. 6 is the structural schematic diagram of lower cavity die bottom involved in Fig. 1；
Fig. 7 is the internal view of lower cavity die involved in Fig. 1；
Fig. 8 is the structural schematic diagram of type core involved in Fig. 1；
Fig. 9 is the assembled state structure chart of the gear set, screw rod and the oil cylinder that have inside lower die holder involved in Fig. 1；
Structure graph of the Figure 10 for upper cavity die and lower cavity die involved in Fig. 1 and after being combined with ejector；
Figure 11 is 1/4 cross-sectional view of state shown in Figure 10；
Figure 12 is the stereoscopic-state structure chart of the ejector in structure shown in Figure 10.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only
The embodiment of the application a part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
Member's every other embodiment obtained without making creative work, all should belong to the model of the application protection
It encloses.
Inventive concept of the invention is the large deformation process unidirectionally extruded in single pass due to non-ferrous metal such as magnesium alloy
In be easy brittle failure, therefore small extrusion deformation twice or repeatedly is resolved into the primary big extrusion deformation of magnesium alloy, with this
Come improve non-ferrous metal such as magnesium alloy crystal grain refinement effect, improve uniformity of its blank in deformation process,
In the case where this grain refining effect is significantly improved, the forming that blank then carries out pipe fitting utilizes rotation in the process
The type core turned, will further such that pipe fitting in forming process by shear-deformable, more improve degree of grain refinement, make it
Blank tissue is more uniform, to ensure that the quality of product.
In order to preferably illustrate inventive concept of the invention, specific structure is as follows:
As shown in Fig. 1,8, a kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times, comprising: upper die holder
500, lower die holder 600 and it is installed on the guide post 700 and guide sleeve of upper die holder 500, lower die holder 600, while further includes having: formed punch 100,
Upper cavity die 200, lower cavity die 300, type core 400 and ejector 800.
As shown in Figure 1, the formed punch 100, is fixed on the upper die holder 500 and mobile with the upper die holder 500, is used for
Nonferrous metals are squeezed.
As in Figure 2-4, the upper cavity die 200, positioned at the lower section of the formed punch 100, and the upper cavity die 200 have one with
The first hollow cavity 201 that the formed punch 100 matches, the first hollow cavity 201 include 202 He of formed punch fit circular arc section
At least two sections and the coaxial blank extruding arc section 203 formed according to the different extrusion ratio of nonferrous metals, and at least
Two sections of blank squeezes the diameter that its blank squeezes arc section 203 from top to bottom of arc section 203 and gradually becomes smaller.Implementation of the invention
Arc section 203 is squeezed using two sections of blanks with different extrusion ratios in example.
The diameter that blank squeezes arc section 203 in the present invention gradually becomes smaller, and is in order to enable blank is got in extrusion process
The extrusion ratio of its blank is bigger down, and deformation extent is bigger.In addition, in order to enable optimal deformation temperature in blank extrusion process
Degree, is additionally provided with the heating rod 204 for being heated in blank extrusion process to blank on the upper cavity die 200.With
This simultaneously, the blank of formed punch fit circular arc section 202 and at least two sections squeezes between arc section 203 and two sections of blanks squeeze circular arcs
Section 203 is all made of arc transition connection.
Upper cavity die 200 of the invention, which is mainly realized, resolves into two for the primary big extrusion deformation of non-ferrous metal such as magnesium alloy
Secondary or multiple small extrusion deformation, the effect of the crystal grain refinement of non-ferrous metal such as magnesium alloy is improved with this, its blank is made to exist
Uniformity in deformation process is improved.
As illustrated in figs. 5-7, lower cavity die 300, positioned at the upper cavity die 200 lower section and fixed with 200 phase of cavity plate thereon.Its
The fixed form of upper cavity die 200 and lower cavity die 300 uses the positioning method of boss and deep gouge, specifically: the upper cavity die 200
Bottom, which is provided with, prevents the rotation stop key 205 that cavity plate 200 rotates thereon and the boss 206 with 300 location fit of lower cavity die,
Correspondingly, offering rotation stop key groove 306 and boss deep gouge 307 at the top of the lower cavity die 300.
Since lower cavity die is the important shaping stage of blank, it is also provided in one and first on the lower cavity die 300
The second coaxial hollow cavity 301 of empty cavity 201, the second hollow cavity 301 include the transition circle segmental arc before blank forming
302, blank forming arc section 303, tapering transition arc section 304 and equal diameter through-hole arc section 305, wherein the blank at
Transition circle segmental arc 302, blank forming arc section 303 before shape are adjacent to during shaping pipe fitting with blank completely, described etc.
There are gaps between pipe fitting after diameter through hole arc section 305 and blank forming.In addition, in order to enable in blank extrusion process most
Good deformation temperature is additionally provided with for adding in blank extrusion process to what blank was heated on the lower cavity die 300
Hot pin 204.
Heating rod 204 in upper cavity die 200, the heating rod 204 in lower cavity die 300, which can be, to be respectively arranged, and is also possible to
Using same root heating rod, in the present embodiment, the heating rod 204 in upper cavity die 200 and lower cavity die 300 uses same root to add
Hot pin.
The lower section of tapering transition arc section 304 is arranged in equal diameter through-hole arc section 305 in lower cavity die 300, due to blank
Size can process the diameter of equal diameter through-hole arc section 305 slightly big by one it has been determined that for the ease of processing after forming
A bit.
As shown in figure 8, the type core 400, is arranged on the lower die holder 600 and is placed in the described second hollow cavity 301
Inside, for matching the hollow portion for being shaped pipe fitting with the lower cavity die 300.Due in type core 400 and described second
Empty cavity 301 match and have in the second hollow cavity 301 blank forming before transition circle segmental arc 302, blank forming circle
Segmental arc 303, tapering transition arc section 304 and equal diameter through-hole arc section 305 are not same diameter, and therefore, the type core 400 is different
The diameter at position is variable diameter.
In the present invention, type core 400 can be fixed, that is, is fixed on its lower die holder 600, is also possible to rotate
Movement.The present invention is preferentially rotation using type core 400.Therefore, the structure for driving its type core 400 to rotate is specific as follows:
As shown in Fig. 1,9, the tooth of the lower die holder 600 being internally provided with for driving 400 positive and negative rotation of type core
Wheel group 601 and the screw rod 602 for driving 601 positive and negative rotation of gear set, wherein the gear set 601 include central gear 603,
The inside of the lower die holder 600, the centre tooth is arranged in transition gear 604 and connection gear 605, the central gear 603
The top of wheel 603 be also installed with the type core 400 and the central gear 603, transition gear 604 and connection gear 605 it
Between while be meshed in order the screw rod 602 be still to keep being meshed with the connection gear 605, to pass through screw rod
602 driving effect drives gear set 601 to move, and then realizes that the type core 400 on central gear 603 rotates.
The movement of screw rod 602 is driven by hydraulic cylinder, movement the moving up and down Lai real by upper die holder 500 of hydraulic cylinder
It is existing.I.e. as shown in Fig. 1,9, the screw rod 602 is connected with the first hydraulic cylinder 606 being arranged in the lower die holder 600, together
When, first hydraulic cylinder 606 is connected by the oil circuit 608 of connection with the second hydraulic cylinder 607, second hydraulic oil
Cylinder 607 is connected with the upper die holder 500, to promote its second hydraulic cylinder 607 to transport by moving up and down for upper die holder 500
The movement of its first hydraulic cylinder 606 is promoted by second hydraulic cylinder 607 again after dynamic, and then its screw rod 602 is driven to realize a left side
The movement of right direction, it is final to realize the driving core 400 of gear set 601 forward or reverse.
In the present embodiment, realizes gear set 601 forward or reverse, be the first hydraulic cylinder 606 and second by being connected to
Hydraulic cylinder 607 is realized.Upper die holder 500 is moved down along guide post 700, the first hydraulic cylinder 606 and the second hydraulic cylinder 607
Oil liquid is compressed, and lead-screw 602 rotates forward.On the contrary, upper die holder 500 is moved up along guide post 700, the first hydraulic cylinder 606
It is released with the oil liquid of the second hydraulic cylinder 607, lead-screw 602 rotates backward.At the same time, it in the present embodiment, uses
Two group of first hydraulic cylinder 606 and two group of second hydraulic cylinder 607, it is therefore an objective to power when increment type core 400 rotates, another party
Face is also in the case where guaranteeing one of hydraulic cylinder damage, another hydraulic cylinder also can guarantee the rotation of type core 400.
Correspondingly, screw rod 602 also uses two groups, and gear set 601 is also corresponding to use two groups, two groups of teeth wheel group 601 it
Between shared a central gear 603.
In order to the velocity of rotation and extrusion speed of better control type core 400, first hydraulic cylinder is being connected
606 and second hydraulic cylinder 607 oil circuit 608 on be provided with the throttle valve for adjusting the type core rotation speed.
It is normal for maintenance core 400 since the depth for being provided with oil liquid and lower die holder 600 in lower die holder 600 is deeper
Work, the present embodiment are provided with thrust ball bearing between the gear set 601 and the lower die holder 600.
It is taken out in order to the pipe fitting after shaping, the crowded pipe forming device of the present embodiment further includes having ejector 800, such as
Shown in Figure 10-12, the ejector 800 includes fixed in order bottom knockout portion 801, upper liftout portion 802 and middle interconnecting piece
803, the bottom knockout portion 801 runs through and extend out to the outside of 600 upper surface of lower die holder, and the middle interconnecting piece 803 is
The disk connector of one hollow form is placed on the lower die holder 600, and the disk connector has radially direction and court
Several extensions 804 of its disk connector internal stretch, the extension 804, which is placed in, is provided with 300 bottom of lower cavity die
The end of the extension 804 is also fixed with 803 phase of liftout portion thereon simultaneously in the U-lag 308 in portion, and the upper liftout portion 802 is passed through
The outside of 300 upper surface of lower cavity die is worn and extend out to, and the top in liftout portion 802 extends to the upper cavity die 200 thereon
On the lower end surface for the formed punch fit circular arc section 202 being arranged at the top inside having.
In the present embodiment, the bottom knockout portion 801 is several equally distributed first vertical bars and this is first vertical
The top of bar is mutually fixed with the disk connector.Here, due to being provided with oil liquid in lower die holder 600, in order to enable being included in
The surface cleaning in the bottom knockout portion 801 inside the lower die holder 600 will be included in the bottom knockout portion inside the lower die holder 600
801 outside is provided with casing 609；The upper liftout portion 803 is several equally distributed second vertical bars and this is second perpendicular
The quantity of straight-bar and the extension 804 matches.
It, can be by bottom knockout portion 801 in order to not interfere bottom knockout portion 801 with the gear set 601 inside lower die holder 600
Then setting just withstands pipe fitting by middle interconnecting piece 803 and upper liftout portion 802, by upper liftout portion in 601 outside of gear set
802 top extends to the lower end surface for the formed punch fit circular arc section 202 being arranged at the top having in the upper cavity die 200
On, it is since the diameter for the formed punch fit circular arc section 202 being arranged at the top is maximum, ejector 800 will can be managed entirely completely
Part ejection.
Different squeeze is arranged according to nonferrous metals using what is used inside upper cavity die in crowded pipe forming device of the invention
Pressure ratio and at least two sections of blank being formed squeezes arc section and realizes that continuous several times are squeezed and deformed, and are improved to nonferrous metals
The grain refining effect of non-ferrous metal；The present invention utilizes the cooperation of hydraulic cylinder and screw rod, can drive and be mounted on inside lower die holder
Gear set rotation, and then the type core that is mounted in lower cavity die is driven to keep rotating in blank forming process, the rotation of type core
Have the advantage that since type core rotates in forming process, blank shape pipe fitting inner surface in forming process with rotation
Type core between generate pivoting friction, the presence of frictional force can be such that the inner wall of blank is sheared, generate it is shear-deformable.Therefore,
The rotation of type core will significantly improve the uniformity of crystal grain, and the mechanical property of non-ferrous metal drip molding is remarkably reinforced, subtracts simultaneously
The generation of crackle in forming process is lacked；The present invention is in order to guarantee to shape pipe fitting inner wall quality and size, using forming process type
Core and pipe fitting inner wall Full connected；Blank shaped segment and equal diameter through-hole arc section, equal diameter are provided in lower cavity die of the invention
The purpose of through-hole arc section is the frictional force in order to reduce forming pipe fitting and lower cavity die；The present invention in order to make blank at
There is suitable deformation temperature during shape, using the heating rod being mounted on inside upper cavity die and lower cavity die；Benefit of the invention
Moving up and down for formed punch is driven with upper die holder, collocation carrys out the rotation of driving core using the driving structure of hydraulic cylinder and screw rod,
So that blank passes through the unidirectionally extruded forming that pipe fitting can be completed of a time, pipe is squeezed while improving the production efficiency and entirely
Forming device structure is simple.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times, comprising: upper die holder, lower die holder and be installed on
The guide sleeve and guide post of upper and lower die holder, which is characterized in that the crowded pipe forming device further includes having:
Formed punch is fixed on the upper die holder and mobile with the upper die holder, for squeezing nonferrous metals；
Upper cavity die, positioned at the lower section of the formed punch, and the upper cavity die has a first hollow cavity matched with the formed punch,
The first hollow cavity include formed punch fit circular arc section be arranged according to nonferrous metals difference extrusion ratio at least two
Section and coaxial blank squeeze arc section, and its diameter gradually becomes smaller at least two sections of blank extruding arc section from top to bottom；
Lower cavity die is fixed on the lower die holder and is located at the lower section of the upper cavity die and mutually fix with upper cavity die, in addition, described
Be also provided with a second hollow cavity coaxial with the first hollow cavity on lower cavity die, the second hollow cavity include blank at
Shape arc section, tapering transition arc section and equal diameter through-hole arc section, wherein the blank forming arc section and blank are shaping
It is adjacent to completely during pipe fitting, there are gaps between the pipe fitting after the equal diameter through-hole arc section and blank forming；
Type core is arranged on the lower die holder and is placed in the inside of the described second hollow cavity, is used for and the lower cavity die matches
Close the hollow portion for being shaped pipe fitting.
2. a kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times according to claim 1, feature exist
In the inside of the lower die holder is additionally provided with the gear set for driving the type core positive and negative rotation and drives the gear set just
The screw rod of reversion, wherein the gear set includes central gear, transition gear and connection gear, and the central gear setting exists
The inside of the lower die holder, the top of the central gear be equipped with the type core and the central gear, transition gear and
The screw rod is still to keep being meshed with the connection gear while being meshed in order between connection gear, to pass through spiral shell
The driving effect of bar drives gear set to move, and then realizes the type core rotation on central gear.
3. a kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times according to claim 2, feature exist
In, the screw rod is connected with the first hydraulic cylinder being arranged in the lower die holder, meanwhile, first hydraulic cylinder passes through company
Logical oil circuit is connected with the second hydraulic cylinder, and second hydraulic cylinder is connected with the upper die holder, to pass through upper mold
The moving up and down of seat is promoted the fortune of its first hydraulic cylinder after promoting its second hydraulic cylinder to move by second hydraulic cylinder again
It is dynamic, and then its screw rod is driven to realize the movement of left and right directions, the final realization driving core of gear set is forward or reverse.
4. a kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times according to claim 1, feature exist
In, the heating rod heated in blank extrusion process to blank is separately provided on the upper cavity die, lower cavity die, with
Reach optimal deformation temperature in blank extrusion process.
5. any one is directed to the crowded pipe forming device that non-ferrous metal continuous several times squeeze described in -4 according to claim 1,
Be characterized in that, the crowded pipe forming device further includes having ejector, the ejector include the bottom knockout portion fixed in order, in
Between interconnecting piece and upper liftout portion, the bottom knockout portion runs through and extend out to the outside of the lower die holder upper surface, and the centre connects
Socket part is that the disk connector of a hollow form is placed on the lower die holder, and the disk connector has radially that direction is simultaneously
Towards several extensions of its disk connector internal stretch, the extension is placed in the U-shaped for being provided with the lower cavity die bottom
The end of the extension is also mutually fixed with liftout portion thereon simultaneously in slot, and the upper liftout portion runs through and extend out to the lower cavity die
The outside of upper surface, and the formed punch cooperation being arranged at the top having in the upper cavity die is extended at the top of liftout portion thereon
On the lower end surface of arc section.
6. a kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times according to claim 5, feature exist
Being provided in, the bottom of the upper cavity die prevents the rotation stop key of cavity plate rotation thereon and convex with the lower cavity die location fit
Platform, correspondingly, offering rotation stop key groove and boss deep gouge at the top of the lower cavity die.
7. a kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times according to claim 5, feature exist
In the bottom knockout portion is several equally distributed first vertical bars and the top of first vertical bar is connect with the disk
Part is mutually fixed, and the upper liftout portion is several equally distributed second vertical bars and second vertical bar and the extension
Quantity matches.
8. a kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times according to claim 5, feature exist
In being provided with the section for adjusting the type core rotation speed on the oil circuit for connecting first hydraulic cylinder and the second hydraulic cylinder
Flow valve.
9. a kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times according to claim 7, feature exist
In including to be provided with casing on the outside of the bottom knockout portion inside the lower die holder, and in the gear set and the lower die
Thrust ball bearing is provided between seat.
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| CN201811370493.2A CN109332411B (en) | 2018-11-17 | 2018-11-17 | Tube extrusion forming device for continuous and repeated extrusion of nonferrous metal |
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| CN109332411B CN109332411B (en) | 2023-09-15 |
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| CN112642871A (en) * | 2020-12-21 | 2021-04-13 | 滕广涛 | Central air-conditioning copper pipe forming processing machine and forming processing method |
| CN113369323A (en) * | 2021-05-26 | 2021-09-10 | 浙江方宏空调设备有限公司 | Semi-solid hot press molding equipment for automobile air conditioner silencer |
| CN114346148A (en) * | 2021-12-23 | 2022-04-15 | 重庆长安工业(集团)有限责任公司 | Multilayer extrusion die suitable for revolving body extrusion part |
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