CN104174678A - Continuous extrusion machine with symmetry plane of large surfaces of expanded cavity perpendicular to axis of extrusion wheel - Google Patents

Continuous extrusion machine with symmetry plane of large surfaces of expanded cavity perpendicular to axis of extrusion wheel Download PDF

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Publication number
CN104174678A
CN104174678A CN201410445732.1A CN201410445732A CN104174678A CN 104174678 A CN104174678 A CN 104174678A CN 201410445732 A CN201410445732 A CN 201410445732A CN 104174678 A CN104174678 A CN 104174678A
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cavity
die
squeegee roller
plane
die cavity
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CN201410445732.1A
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CN104174678B (en
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刘元文
裴久杨
闫志勇
张旭
宋宝韫
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Dalian Kangfeng Science & Technology Co Ltd
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Dalian Kangfeng Science & Technology Co Ltd
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Abstract

The invention belongs to equipment used for continuous extrusion and discloses a continuous extrusion machine with a symmetry plane of large surfaces of an expanded cavity perpendicular to an axis of an extrusion wheel. A divergent die is arranged behind a cavity feeding hole and the expanded cavity; a die is arranged behind the divergent die; the divergent die and the die are fixed in the cavity through a cavity cover; the cavity cover and the cavity are connected through a screw; the axis of the extrusion wheel is basically perpendicular to the symmetry plane of large surfaces of the expanded cavity; and a divergent die with a splayed divergent groove is arranged between the die and the expanded cavity. Generally speaking, according to the invention, the expansion direction of the expanded cavity is changed into a direction perpendicular to a traditional expanded cavity, extrusion of copper bar products is changed from an original horizontal mode to a vertical mode, the cavity feeding hole is greatly enlarged in the arc tangential direction, and the flow velocity of a blank in the cavity die is adjusted by utilizing the divergent die, so that the extruded products are kept straight.

Description

The plane of symmetry continuous extruder vertical with squeegee roller axis that expansion die cavity is large
Technical field
The invention belongs to non-ferrous metals processing field, relate to for continuously extruded equipment.
Background technology
Existing continuous extrusion apparatus is produced large width product, all adopts single-wheel list groove or single-wheel dual-slot structure, and product width direction place plane is parallel with main-shaft axis, and the large plane of the product namely squeezing out is parallel with main-shaft axis.Product width is limited by boots seat width and frame width, if want to produce large width product, the width that just must increase boots seat has enough strength and stiffness to guarantee boots seat, the width that increases boots seat will inevitably make frame width widen, can cause like this axis system strong point span to increase, rigidity variation, thus cause each part life of axis system to reduce.The flash being oxidized for fear of squeegee roller surface enters product, when therefore generally product quality is had higher requirements, the width dimensions of cavity charging aperture, be generally less than or equal the width dimensions of squeegee roller groove, this has just determined that the size of expansion cavity feed gap dimension on cavity propagation direction must approach with blank diameter, want to do large width product, just must to adopt large diameter round bar as blank, blank diameter adds the moment of torsion that conference causes equipment, it is large that the apparatus of load such as radial load become, therefore, must strengthen squeegee roller diameter, increase main shaft diameter and bear nip load, this causes motor, reduction box increases rapidly, make the continuous extruder of producing large width become very huge and expensive.Along with the increase of extruder, the frock of extruder, mould are as the weight of squeegee roller, cavity etc. also increase rapidly, and this has just caused manufacturing cost significantly to rise, and makes the operating cost of main equipment apparently higher than mini-plant.
Summary of the invention
The object of the invention is in order to provide a kind of short span high rigidity continuous extruder, realize the extruding of flakiness ratio product, realization squeezes out the product of large width on small extruding machine, solve product flakiness ratio and more than 25 be just difficult to once extrusion modling on continuous extruder, reduce the production run cost that extruder cost can also effectively reduce equipment simultaneously.
The technical scheme that the present invention adopted is for achieving the above object: a kind of plane of symmetry continuous extruder vertical with squeegee roller axis of expanding large of die cavity, cavity 106 with ring-shaped groove 111 squeegee rollers 109, match, Combined stopping block 107 is installed on cavity, after cavity charging aperture and expansion die cavity, divergent die 601 is installed, mould 104 is installed after divergent die, and divergent die and mould are covered and are fixed in cavity by cavity, between cavity lid 110 and cavity, with screw, are connected; The axis 108 of described squeegee roller 109 is substantially vertical with the plane of symmetry 501 of large 101 of die cavity both sides of expansion, at mould, has the divergent die with "eight" shape splitter box with expanding between die cavity.
Described expansion die cavity is flat "eight" shape, and the large scale B of expansion die cavity 502 is 5 times to 20 times of bar material diameter D.
The angle beta that the extended boundary envelope of surfaces line of described expansion die cavity forms between 120 ° to 175 °, preferably 150 °.
Described expansion die cavity, extrudes one, direction with drafting angle at product, 1 ° to 10 ° of drafting angle, preferably 5-6 °.
The large scale C of described cavity charging aperture 503 is the line direction along feeding guide-plate and material blocking block, and large scale C be blank 101 diameter D 1.2-3 doubly, preferably 1.5-2.5 is doubly.
Described divergent die structure is to be "eight" shape divergent die and middle with projection, and protruding both sides are the mobile divergent die grooves 602 of blank, and the length L 1 of the splitter box of close feeding guide-plate side is greater than the length L 2 near the splitter box of material blocking block side.
Described divergent die and extrusion die are integrative-structure, or Split type structure.
Described die inlet is with choked flow angle, and the angular range at choked flow angle is 1 ° to 8 °, and preferably 3 ° to 6 °, calibrating strap is below choked flow angle, and the length of calibrating strap is 1.5-4mm, preferably 2-3mm.
Four jiaos of described cavitys are provided with heater 201, and heater consists of heater watch box and electrothermal tube, and electrothermal tube is placed in hot device watch box.
, with cooling device 202, there is mutual UNICOM water flow channel described cavity bottom surface in cooling device.
Continuous extruder is that rotary squeezing wheel is upper with circumferencial direction ring-shaped groove, maintain certain interval with squeegee roller and the cavity that coordinates with squeegee roller on material blocking block, mould is installed in cavity, product squeezes out in mould.
Continuous extruder of the present invention, the propagation direction of expansion die cavity carries out along the squeegee roller groove plane of symmetry, also the plane of symmetry of expanding large of the die cavity left and right sides is substantially vertical with squeegee roller axis, the approximate rectangular section copper bar product of take is example, the large plane of the product squeezing out vertical with rotation centerline squeegee roller; This device is of a size of cavity charging aperture 1.2 to 2.5 times of blank diameter in feeding guide-plate and material blocking block line direction; And utilize divergent die to adjust the flow velocity of blank in cavity mold, keep the product that squeezes out straight.
Content of the present invention is exactly generally to change the propagation direction of expansion die cavity into the direction vertical with tradition expansion die cavity, for copper bar series products, by original level, extruded to change into and vertically vertically extrude, cavity charging aperture is strengthened greatly in circular arc tangential line direction, and utilize divergent die to adjust the flow velocity of blank in cavity mold, keep the product that squeezes out straight.
The present invention due to continuously extruded characteristic has determined to go out at cavity charging aperture will be faster than near feeding guide-plate one side near the charging rate of material blocking block one side, therefore technological difficulties of the present invention are that how to keep product to squeeze out after mould the speed up and down of product consistent, also how to keep that product is straight to be squeezed out.Flow velocity is inhomogeneous when solving the inhomogeneous product extrusion die causing of cavity charging aperture place speed, and the present invention has a divergent die before mould, adjusts the flow velocity of blank, guarantees that the product squeezing out is straight.
Four jiaos of cavitys of the present invention can be with electric hot plate, and electric hot plate adopts heater watch box and electrothermal tube to form.This electric hot plate can improve the temperature of cavity expansion slot both sides, is conducive to flow with blank expansion.
Divergent die of the present invention is for adjusting because the plane of symmetry of large of the expansion die cavity left and right sides is asymmetric with the substantially vertical institute's blank causing of squeegee roller axis upper and lower flow velocity in expansion die cavity, and then cause product extrusion die mouth to the problem of curving, described divergent die will be turned down at blank flow velocity or flow near material blocking block one side, and will heighten near feeding guide-plate one side blank flow velocity or flow, upper and lower flow velocity uniformity while making final blank flow to mould outlet, can guarantee the straight extrusion die mouth of product.
The large plane of the products export width on the boots seat of continuous extruder of the present invention is vertical with the rotation direction of squeegee roller.The large scale of the products export of boots seat is consistent with the height dimension direction of boots seat, can greatly reduce the width of boots seat, also greatly reduced the span of extruder frame, shortened the distance of main shaft left and right sides bearing, the strength and stiffness of boots seat and axis system have been improved, improve the service life of main shaft and main shaft bearing, significantly reduced manufacturing cost and the use cost of extruder, can push the product that flakiness ratio is larger simultaneously.
The length dimension of cavity charging aperture is consistent with the width of product, the extension forming that is conducive to blank, can cavity feed gap dimension be lengthened along cavity blank propagation direction like this, increase the area of cavity charging aperture, can reduce the unit pressure on material blocking block, improve the service life of material blocking block.Such structure just makes the length dimension of cavity charging aperture no longer be subject to the restriction of blank diameter and squeegee roller groove width, cavity feed gap dimension can be far longer than the width of squeegee roller groove, therefore can realize and use the blank of minor diameter on small extruding machine, to squeeze out wider product.
Accompanying drawing explanation
Fig. 1 is the plane of symmetry continuous extruder schematic diagram vertical with squeegee roller axis of large of expansion die cavity;
Fig. 2 is cavity assembly relation schematic diagram;
Fig. 3 is heater 201 schematic diagrames;
Fig. 4 is cooling device 202 structural representations;
Fig. 5 is cavity 106 cutaway views;
Fig. 6 is divergent die 601 structural representations;
Fig. 7 is mould 104 structure charts;
In figure: 101 large of expansion die cavities, 102 compact wheels, 103 feeding guide-plates, 104 moulds, 106 cavitys, 107 material blocking blocks, 108 squeegee roller axis, 109 squeegee rollers, 110 cavity lids, 111 ring-shaped grooves;
201 heaters, 202 cooling devices, 203 guide plate mounting grooves, 301 heater watch boxes, 302 electrothermal tubes;
401 coldplates, 402 water inlet pipes, 403 return pipes;
501 cavitys spread large plane of symmetry of die cavity, 502 expansion die cavities, 503 charging apertures, 601 divergent dies, 602 divergent die grooves, θ is splitter box angle on divergent die, γ mould choked flow angle, the angle of the left and right sides of β expansion die cavity flat " eight ", L1 is near the splitter box length of feeding guide-plate one side, and L2 is near the splitter box length of material blocking block side, and C cavity charging aperture is in the length of propagation direction, the greatest width dimension of flat " eight " type of B expansion die cavity, E expansion slot is near mould place width.
The specific embodiment
Below in conjunction with specific embodiment and accompanying drawing, the invention will be further described, but the present invention is not limited to specific embodiment.
As shown in Figure 1, a rotary squeezing with ring-shaped groove 111 takes turns 109 to extruder of the present invention, and this squeegee roller 109 is arranged on the prestressing force axis system of string nested structure; A cavity 106 with arc surface, the centre of gyration of this cambered surface aligns substantially with the axis 108 of the circular arc of squeegee roller 109, between two cambered surfaces, keep certain gap, to there is not direct contact during work, on cavity 106, have a charging hole 503, what be connected with this charging hole is a blank expansion die cavity 502; The feeding guide-plate 103 of circular shape, is arranged in the guide plate mounting groove 203 of cavity cambered surface top; Material blocking block 107 is arranged on cavity, and its bossing stretches in the ring-shaped groove 111 of squeegee roller 109; Pressure wheel 102 extend in squeegee roller groove 111, and the ring-shaped groove 111 of squeegee roller 109 is less than blank diameter with the maximum interspace that pressure wheel 102 forms; Mould 104 is arranged in cavity 106, has a divergent die 601 before mould, between cavity 106 and cavity lid 110, with bolt, connects, and makes cavity 106, divergent die 601, and mould 104, cavity lid 110 form a component parts body; On four angles of cavity 106, be separately installed with a heater 201(as shown in Figure 3), this this device is comprised of heater watch box 301 and electrothermal tube 302, the wire of electrothermal tube 302 is connected with power supply, the position of heater 201 can regulate, after cavity 106 installs, regulate the position of heater 201, make itself and cavity 106 close contacts, be conducive to the conduction of heat; On the bottom surface of cavity 106, have a cooling device 202(as shown in Figure 4), by coldplate 401, water inlet pipe 402 and return pipe 403, formed, coldplate 401 inside are processed with the hole being interconnected, and guarantee that cooling water circulation flows.
As shown in Fig. 2, Fig. 5, the expansion die cavity 502 of described cavity 106 is to carry out to external expansion along the squeegee roller groove plane of symmetry, and the plane of symmetry 501 of also expanding large 101 of die cavity 502 left and right sides is substantially vertical with squeegee roller axis 108.
Described cavity charging aperture 503 is blank diameter at the size C of extended pattern cavity direction 1.5 to 3 times, preferably 2 to 2.5 times.
Described expansion die cavity 502, extrudes one, direction with drafting angle at product, 1 ° to 10 ° of drafting angle, preferably 5-6 °.
Described expansion die cavity 502 at extruded product width for being similar to flat "eight" shape, the angle β of flat " eight " left and right sides generally between 120 ° to 175 °, preferred 150 ° of left and right.
The greatest width dimension B of flat " eight " type of described expansion die cavity 502 is 5 to 20 times of copper shank diameter D.
As shown in Figure 6 and Figure 7, splitter box 602 on described divergent die 601, for the "eight" shape groove 602 producing on divergent die, groove length near feeding guide-plate side is L1, groove length near material blocking block side is L2, L1 is greater than L2 length dimension 3mm to 20mm, and divergent die inclination angle [theta] is 3 ° to 60 °, and the inclination angle [theta] of left and right sides splitter box can be unequal.
Described mould 104, entrance side is with choked flow angle γ, and the scope of choked flow angle γ is 1 ° to 8 °, and preferably 3 ° to 6 °, calibrating strap is below choked flow angle, and the length of calibrating strap is 1.5-4mm, preferably 2mm is to 3mm.
Before cavity 106 packs extruder into, assembled and be heated to predetermined temperature, by 302 energisings of the electrothermal tube of heater 201, make the temperature of heater identical with the preheat temperature of cavity 106.Blank is after the extruding of pressure wheel 102, deform, because being squeezed, distortion takes turns the restriction of trenched side-wall, make to be out of shape the larger pressure of formation between rear blank and the surface of squeegee roller groove, existence due to stiction, during squeegee roller 109 rotation, blank rotates together with squeegee roller 109, continuous increase along with the length of nipping, stiction constantly increases, when squeegee roller turns over after about 90 °, blank runs into material blocking block 107 and stretches into stopping of squeegee roller groove internal projection part, and now the stiction between blank and squeegee roller 109 flute surfaces has enough forced blank to deform, produce a large amount of distortion heat simultaneously, the temperature of blank is raise, resistance of deformation reduces, there is Plastic Flow, blank enters in expansion die cavity 502 by the charging hole 503 on cavity 106, after divergent die 601 and mould 104, forms product 105.
Described extruder, the axis 108 of its squeegee roller 109 is vertical with the symmetrical plane 501 of two the large faces 101 in expansion die cavity left and right, and product width is not subject to the restriction of frame width, can reduce frame span, increases axis system rigidity;
On described cavity 106, have a cambered surface to match with the cambered surface of squeegee roller, the large scale C of charging hole 203 is at the circumferencial direction of circular arc, and this size is not subject to the restriction of blank diameter, is 1.2 to 3 times of blank diameter, realizes large ratio extruding;
A circular blank embeds in the groove of squeegee roller 109 after the extruding of pressure wheel 102, and therewith rotate, after feeding guide-plate 103, be subject to entering cavity 106 after the stopping of material blocking block 107, after mould 104, form product 105, device for simultaneous heating 201 energisings, cooling device 202 passes into cooling water, and assurance cavity is worked at default temperature.
Adopt the plane of symmetry continuous extruder vertical with squeegee roller axis of large of above-mentioned expansion die cavity, take that to draw T2 copper bar on 20mm be blank, squeegee roller diameter is 400mm, squeegee roller material is H13 hot die steel, cavity charging aperture large scale C is 50mm, the angle β of the left and right sides of expansion die cavity flat " eight " is 150 °, cavity expansion slot width B is 240mm, the width E at expansion slot and mould contact surface place is 25mm, cavity drafting angle is that 3 ° of cavity materials are H13 hot die steel, the shunting angle θ of divergent die is 15 °, near material blocking block side size L2, be 100mm, near feeding guide-plate side L1, be of a size of 120mm, the drafting angle of divergent die is 3 °, mould choked flow angle γ is 5 °, extrusion modling of the R angle bus duct copper bar that to have realized product be 230mm * 7mm.This 230mm * 7mm bus duct copper bar cannot be produced on traditional continuous extruder at all, and conventional production methods is the copper bar of extruding 230mm * 11.5mm, then through being rolled down to 230mm * 7mm, more annealed and pickling.Adopt continuous extruder of the present invention not only to realize an extrusion modling of the bus duct copper bar of super large flakiness ratio, saved annealing operation and pickling process, also solved the environmental issue of traditional pickling, there is significant economic benefit and social benefit.

Claims (10)

1. a plane of symmetry continuous extruder vertical with squeegee roller axis of expanding large of die cavity, cavity (106) with ring-shaped groove (111) squeegee roller (109), match, Combined stopping block (107) is installed on cavity, it is characterized in that: after cavity charging aperture and expansion die cavity, divergent die (601) is installed, mould (104) is installed after divergent die, and divergent die and mould are covered and are fixed in cavity by cavity, between cavity lid (110) and cavity, with screw, are connected; The axis (108) of described squeegee roller (109) is substantially vertical with the plane of symmetry (501) of expansion die cavity both sides large (101), between mould and expansion die cavity, has the divergent die with "eight" shape splitter box.
2. a kind of plane of symmetry continuous extruder vertical with squeegee roller axis of expanding large of die cavity according to claim 1, is characterized in that: expansion die cavity is flat "eight" shape, and the large scale B of expansion die cavity (502) is 5 times to 20 times of bar material diameter D.
3. a kind of plane of symmetry continuous extruder vertical with squeegee roller axis of expanding large of die cavity according to claim 2, it is characterized in that: the angle beta that the extended boundary envelope of surfaces line of described expansion die cavity forms between 120 ° to 175 °, preferably 150 °.
4. a kind of plane of symmetry continuous extruder vertical with squeegee roller axis of expanding large of die cavity according to claim 2, is characterized in that: described expansion die cavity, at product, extrude one, direction with drafting angle, 1 ° to 10 ° of drafting angle, preferably 5-6 °.
5. a kind of plane of symmetry continuous extruder vertical with squeegee roller axis of expanding large of die cavity according to claim 1, it is characterized in that: the large scale C of described cavity charging aperture (503) is the line direction along feeding guide-plate and material blocking block, and large scale C is 1.2-3 times of blank (101) diameter D, and preferably 1.5-2.5 doubly.
6. a kind of plane of symmetry continuous extruder vertical with squeegee roller axis of expanding large of die cavity according to claim 1, it is characterized in that: described divergent die structure is to be "eight" shape divergent die and middle with projection, projection both sides are the mobile divergent die grooves (602) of blank, and the length L 1 of the splitter box of close feeding guide-plate side is greater than the length L 2 near the splitter box of material blocking block side.
7. a kind of plane of symmetry continuous extruder vertical with squeegee roller axis of expanding large of die cavity according to claim 1, is characterized in that: described divergent die and extrusion die are integrative-structure, or Split type structure.
8. a kind of plane of symmetry continuous extruder vertical with squeegee roller axis of expanding large of die cavity according to claim 1, it is characterized in that: described die inlet is with choked flow angle, the angular range at choked flow angle is 1 ° to 8 °, preferably 3 ° to 6 °, calibrating strap is below choked flow angle, the length of calibrating strap is 1.5-4mm, preferably 2-3mm.
9. a kind of plane of symmetry continuous extruder vertical with squeegee roller axis of expanding large of die cavity according to claim 1, it is characterized in that: four jiaos of described cavitys are provided with heater (201), heater consists of heater watch box and electrothermal tube, and electrothermal tube is placed in hot device watch box.
10. a kind of plane of symmetry continuous extruder vertical with squeegee roller axis of expanding large of die cavity according to claim 1, is characterized in that:, with cooling device (202), there is mutual UNICOM water flow channel described cavity bottom surface in cooling device.
CN201410445732.1A 2014-09-04 2014-09-04 The continuous extruder that the plane of symmetry of big of die cavity of extension is vertical with extruding wheel axis Active CN104174678B (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN105478513A (en) * 2016-01-14 2016-04-13 昆明理工大学 Device for simulating equal-channel angular extrusion
CN107159735A (en) * 2017-05-19 2017-09-15 浙江工业职业技术学院 One kind extension shaped device
CN108526236A (en) * 2018-03-14 2018-09-14 四川兰德斯达铝业有限公司 It is close to wait the more corner continuous extrusion devices in channels

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