CN209550266U - A kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times - Google Patents

Abstract

The utility model 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 utility model 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

A kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times

Technical field

The utility model belongs to the field of extrusion molding, and in particular to a kind of crowded pipe forming device is particularly suitable for being directed to Non-ferrous 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, Yi Huishou, 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 purpose of the utility model is to provide it is a kind of for non-ferrous metal continuous several times squeeze crowded pipe at Shape dress is set, it is intended to overcome need multi-pass to squeeze in existing magnesium alloy compressional deformation by several times could be by magnesium alloy grains to smaller The defect of size and solve extrusion speed in magnesium alloy compressional deformation is slow, extrusion ratio unreasonable distribution cause production efficiency it is low, The problems such as product quality declines.

In order to reach above-mentioned purpose of utility model, 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.

The utility model has the beneficial effects that the crowded pipe forming device of the utility model utilizes the basis used inside upper cavity die At least two sections of the blank that nonferrous metals are arranged different extrusion ratios and are formed squeezes arc section to nonferrous metals reality Existing continuous several times are squeezed and deformed, and improve the uniform thinning effect of crystal grain of non-ferrous metal；The utility model using hydraulic cylinder with The cooperation of screw rod can drive the gear set being mounted on inside lower die holder to rotate, and then the type core being mounted in lower cavity die is driven to exist Rotation is kept in blank forming process, the rotation of type core has the advantage that since type core rotates in forming process, blank at The inner surface of shape pipe fitting can make blank generating pivoting friction, the presence of frictional force in forming process between the type core of rotation Inner wall is sheared, and is generated shear-deformable.Therefore, the rotation of type core will significantly improve the uniformity of crystal grain, make non-ferrous metal The mechanical property of drip molding is remarkably reinforced, while having subtracted the generation of crackle in forming process；The utility model is in order to making Blank has suitable deformation temperature in forming process, using the heating rod being mounted on inside upper cavity die and lower cavity die； The utility model drives moving up and down for formed punch using upper die holder, and collocation is driven using the driving structure of hydraulic cylinder and screw rod The rotation of type core is improving the same of production efficiency so that blank passes through the unidirectionally extruded forming that pipe fitting can be completed of a time When and entirely crowded pipe forming device structure is simple.

In conclusion the utility model is resolved into a large deformation of blank by the unidirectional continuously extruded of a time Small deformation at least twice or more time makes its crystal grain refinement to lesser size, group to improve the grain refining effect of blank It knits more uniform；In forming process, using the type core of rotation, product tissue can further improve while reducing extruding force The effect that uniformly refines 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 a further understanding of the present invention, the utility model Illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model.In attached drawing In:

Fig. 1 is a kind of stereochemical structure of the crowded pipe forming device squeezed for non-ferrous metal continuous several times of the utility model Figure；

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 utility model 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.

The utility model design of the utility model is since non-ferrous metal such as magnesium alloy is in unidirectionally extruded big of single pass It is easy brittle failure in deformation process, therefore small extruding twice or repeatedly is resolved into the primary big extrusion deformation of magnesium alloy and is become Shape improves the effect of the crystal grain refinement of non-ferrous metal such as magnesium alloy with this, obtains uniformity of its blank in deformation process To improvement, in the case where this grain refining effect is significantly improved, blank then carries out the forming of pipe fitting, in this process In, using the type core of rotation, will further such that pipe fitting in forming process by shear-deformable, more improve crystal grain refinement Degree keeps its blank tissue more uniform, to ensure that the quality of product.

In order to preferably illustrate the utility model design of the utility model, 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.The utility model Used in the examples is that two sections of blanks with different extrusion ratios squeeze arc section 203.

The diameter that blank squeezes arc section 203 in the utility model gradually becomes smaller, and is in order to enable blank is in extrusion process In its blank more down extrusion ratio it is bigger, deformation extent is bigger.In addition, in order to enable optimal deformation in blank extrusion process Temperature is additionally provided with the heating rod 204 for being heated in blank extrusion process to blank on the upper cavity die 200. At the same time, formed punch fit circular arc section 202 and at least two sections of blank squeeze between arc section 203 and two sections of blanks squeeze and justify Segmental arc 203 is all made of arc transition connection.

The upper cavity die 200 of the utility model, which is mainly realized, decomposes the primary big extrusion deformation of non-ferrous metal such as magnesium alloy At small extrusion deformation twice or repeatedly, the effect of the crystal grain refinement of non-ferrous metal such as magnesium alloy is improved with this, makes its base Expect that the 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 Rotary motion.The utility model is preferentially rotation using type core 400.Therefore, the structure tool for driving its type core 400 to rotate Body is 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.

The crowded pipe forming device of the utility model is different using being arranged according to nonferrous metals for using inside upper cavity die Extrusion 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 mentioned to nonferrous metals The high grain refining effect of non-ferrous metal；The utility model utilizes the cooperation of hydraulic cylinder and screw rod, can drive and be mounted on down Gear set rotation inside die holder, and then the type core being mounted in lower cavity die is driven to keep rotation, type in blank forming process The rotation of core has the advantage that since type core rotates in forming process, blank shapes the inner surface of pipe fitting in forming process In pivoting friction is generated between the type core of rotation, the presence of frictional force can be such that the inner wall of blank is sheared, generate shearing become Shape.Therefore, the rotation of type core will significantly improve the uniformity of crystal grain, increase the mechanical property of non-ferrous metal drip molding obviously By force, while reducing the generation of crackle in forming process；The utility model is adopted to guarantee to shape pipe fitting inner wall quality and size With forming process type core and pipe fitting inner wall Full connected；It is provided with blank shaped segment in the lower cavity die of the utility model and equal diameter is logical Hole arc section, the purpose of equal diameter through-hole arc section are the frictional force in order to reduce forming pipe fitting and lower cavity die；The utility model In order to make blank that there is suitable deformation temperature in forming process, using being mounted in upper cavity die and lower cavity die The heating rod in portion；The utility model drives moving up and down for formed punch using upper die holder, and collocation uses the drive of hydraulic cylinder and screw rod Dynamic structure carrys out the rotation of driving core, so that blank passes through the unidirectionally extruded forming that pipe fitting can be completed of a time, is improving While production efficiency and entire crowded pipe forming device structure is simple.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (10)

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. a kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times according to claim 1 to 4, 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 3, 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.

10. a kind of crowded pipe forming device squeezed for non-ferrous metal continuous several times according to claim 2, feature exist In being provided with thrust ball bearing between the gear set and the lower die holder.