CN204657176U - A kind of U-shaped beam extruder with blank centering body and joist device - Google Patents

Abstract

The utility model discloses a kind of U-shaped beam extruder with blank centering body and joist device, comprise frame, bending oil cylinder, mold, bed die, joist device, hydraulic system, blank centering body, bead assist device, described bending cylinder block is connected on described frame entablature; Described bending cylinder piston rod is connected with described mold by piston Connection Block; Described bed die is by L shape pressing plate and be bolted in frame; Described joist device is connected between frame and bed die; Described multiple bead assist device is connected on bed die; Described two blank centering bodies to be connected in frame and to be arranged near bed die two ends; Described hydraulic system is arranged on upper rack or can is independently arranged near frame, connects each corresponding operating cylinder by oil circuit.

Description

A kind of U-shaped beam extruder with blank centering body and joist device

Technical field

The invention belongs to machining manufacturing equipment field, refer more particularly to the special equipment of a kind of weighing apparatus production and a kind of U-shaped beam extruder.

Background technology

As shown in Figure 1, a kind of U-lag girder steel (being called for short U-shaped beam), being important component part during existing automobile weighing scale platform manufactures, is main spandrel girder in weighing platform structure, and the automobile load of tens tons, up to a hundred tons is welded to form weighing platform to bear primarily of the U-shaped beam of these varying numbers and intensity; Different according to magnitude of load, these U-shaped depths of beam, length are different, and some thicknesss of slab are different, and some width are different; Current weighing apparatus manufacturer mainly conventional U-shaped trammel lattice is the U-shaped beams according to the supporting differing heights of different tonnage and length, highly general at 250mm to 500mm, length is generally at 4m to 9m, the each producer of width differs, general at 200mm to 300mm, it is generally identical that each producer commonly uses U-shaped beam width, also has individual product to use different in width U-shaped beam; It is all fold at the upper a lot of of bender (a kind of standard machine tool) by manually lifting band steel (blank is band steel) that existing weighing apparatus producer processes these U-shaped beams, needs multiple tracks bending to be repeatedly shaped; In conventional U-shaped beam, longer Yi Tiaoliang weighs about 400kg, and need five to six people able-bodied laborers to operate, general U-shaped beam also wants 3 ~ 4 operative, and labour intensity is large; A lot of producer has to that long beam is changed into more piece short beam and respells weldering and form, and efficiency is low, poor quality.

Summary of the invention

The object of the invention is to overcome above-mentioned existing backward technology and a kind of U-shaped beam extruder with blank centering body and joist device is provided, it is a kind of special equipment, want technical solution problem to be: described extruder is the U-shaped beam once suppressed with mould, must be convenient in demoulding, product undercarriage is convenient, reach that yield rate is high, good product quality, production efficiency are high, labour intensity is little, use labour less, save production cost.

For achieving the above object, the present invention is achieved through the following technical solutions:

A kind of U-shaped beam extruder with blank centering body and joist device, comprise frame 1, bending oil cylinder 2, mold 4, bed die 7, joist device 60, hydraulic system 30, blank centering body 8, bead assist device 9, described multiple bending oil cylinder 2 cylinder body is connected on the cylinder flange seat 13 of described frame 1 entablature; Described bending oil cylinder 2 piston rod is connected with described mold 4 by piston Connection Block 26; Described bed die 7 is connected with frame 1 with bolt 77 by L shape pressing plate 75, such permission frame upper/lower die fixing threaded hole 16 position relatively large deviation, bed die 7 can be fixed on tram, and utilize the elastic reaction of L shape pressing plate 75, bed die be connected more firm; Described joist device 60 is connected between frame 1 and bed die 7, joist device 60 comprises multiple demoulding oil jar 5, one piece of stripper plate 6, multiple joist and rolls 601, when demoulding oil jar works, stretching out piston rod drives stripper plate to rise, after stripper plate rising puts in place, joist rolls also can along with the upper surface reaching stripper plate; U-shaped beam in bed die 7 after extrusion molding, can be tightly stuck in bed die groove, needs stripper plate in joist device 60 U-shaped back out; Described bead assist device 9 is connected on bed die 7, when blank advances time, is pressed on the ball 93 on bead assist device 9, and because ball can along all directions flexible rotating, so no matter longitudinally still transverse shifting blank is just very easy and convenient; Described two blank centering bodies 8 to be connected in frame 1 and to be arranged near bed die 7 two ends; The a collection of U-shaped beam of usual processing, wherein a collection of blank width is identical (if width is W), regulate the regulating arm 82 in blank centering body 8, regulating arm one end-stopping plate 822 is made to be W/2 with the distance between center line of bed die 7, the blank being W when width like this advances, and after being close to the baffle plate 822 in blank centering body 8, at this moment blank is with regard to centering, the U-shaped beam size symmetrical squeezed out, product is qualified; Described hydraulic system 30 is arranged on frame 1 top or can is independently arranged near frame, is connected to bending oil cylinder 2 and demoulding oil jar 5, controls corresponding cylinder efficient by hydraulic oil pipe system by oil circuit; Blank is come by crane for hoisting, and blank one end is inserted into above bed die 7 from frame side feed opening, inserts after half and unloads crane gib head, more manually blank push completely carry out above bed die compressing; After blank is compressing in bed die, demoulding oil jar 5 (this order condition controls by oil circuit self-locking system) could be risen again after must first rising mold 4, the U-shaped beam of such shaping can tightly be stuck in bed die groove, can avoid producing folder mold problem; And then rise stripper plate 6, the U-shaped beam be shaped from the demoulding in bed die 7; 601 are rolled owing to being provided with multiple joist in joist device 60, when U-shaped beam is after bed die 7 demoulding, now multiple joist rolls the upper surface that 601 all stretch out stripper plate 6, hold in the palm bottom U-shaped beam, each joist rolls 601 can flexible rotating, creates booster action, and such operating personnel just easily can release frame the U-shaped beam be shaped like a cork above joist rolls 601, hang away with crane again, complete a working cycles.

Wherein, described frame 1 comprises multiple closed memorial archway 11, described closed memorial archway 11 is welded by steel plate or shaped steel, and between described closed memorial archway 11, top is coupled together by the entablature 12 of Plate Welding, is welded with cylinder flange dish 13 for connecting bending oil cylinder 2 below described entablature 12; Between described closed memorial archway 11, bottom is coupled together by the lower box-girder 14 of Plate Welding, and described lower box-girder 14 is provided with mould oil cylinder holes 15 and bed die fixing threaded hole 16 above; Described lower box-girder 14 inside is provided with demoulding oil jar bearing for fixing demoulding oil jar 5; Be provided with lower margin hole 17 bottom described closed memorial archway 11 to can be used for being connected with foot bolt fundamentally, ensure that frame is more stable.

Wherein, described bending oil cylinder 2 cylinder body is provided with flange connecting hole 21, and piston rod is provided with spill circle 22; Described bending oil cylinder 2 piston is coupled together with bolt 27 by piston Connection Block 26 and two panels inserted sheet pin 25; Described piston Connection Block 26 is provided with piston hole 261 and cotter way 263 and screw 262; Described inserted sheet pin 25 is provided with arc groove 251 and through hole 252, the spill circle 22 on the arc groove 251 seized piston bar on inserted sheet pin, and such bending oil cylinder 2 has connected with piston Connection Block 26.

Wherein, described mold 4 becomes box girder structure by Plate Welding, and piston Connection Block 26 is welded on above described mold 4.

Wherein, described bed die 7 is welded by two pieces of risers 71 and base plate 72 and some gussets 73; Described base plate is arranged multiple large round mouth 74 to be connected with stripper plate for allowing the piston rod of demoulding oil jar 5 extend there through; Described base plate 72 is also provided with multiple joist hole 722, for the rigging position providing joist to roll 601 bindiny mechanisms; Connecting hole 76 is provided with for connecting bead assist device 9 in the both sides of base plate 72; The multiple L shape pressing plate 75 in described bed die 7 both sides is connected with frame 1 with bolt 77; Described L shape pressing plate 75 is provided with through hole 751 for connecting bolt.

Wherein, described joist device 60 comprises multiple demoulding oil jar 5, one piece of stripper plate 6, multiple joist and rolls 601, and described demoulding oil jar 5 back seat is provided with connecting hole 51 for being connected with frame, and piston rod is provided with connecting screw hole 52 for being connected with stripper plate, the piston rod of demoulding oil jar 5 is connected with stripper plate 6 with the large round mouth 74 on bed die through the mould oil cylinder holes 15 in frame, described stripper plate 6 is provided with multiple counter sink 61, multiple idler pulley mouth 62 and hinged seat 63, described hinged seat 63 is provided with pin-and-hole 631, above-mentioned joist roll 601 inside be provided with bearing and by bearing pin A602 with stick up bar 603 one end and be connected, described sticking up in the middle part of bar 603 is connected with the hinged seat 63 on above-mentioned stripper plate by bearing pin B604, the described other end sticking up bar 603 is connected with connecting rod 606 by bearing pin C605, described connecting rod 606 other end is connected with fork 608 by bearing pin D607, described fork 608 other end is connected with Connection Block 610 by bearing pin E609, and described Connection Block 610 is fixedly connected in frame 1, when U-shaped beam is after bed die 7 internal shaping before the demoulding, joist in joist device 60 rolls 601 and is in the idler pulley mouth 62 of stripper plate 6, in time starting the demoulding, demoulding oil jar 5 works, piston rod stretches out, rise with stripper plate 6, stripper plate 6 gradually ejects bed die 7 U-shaped beam finished product, joist in this time joist device 60 rolls 601 also along with stripper plate 6 is toward rising, until demoulding oil jar 5 piston rod stretches out when putting in place, joist rolls 601 and also stretches out stripper plate 6 upper surface U-shaped corbel, due to each joist roll 601 inside bearing is housed can flexible rotating, such operating personnel just can push away away the U-shaped beam be shaped like a cork above joist rolls 601.

Wherein, described bead assist device 9 comprises bearing 91, pearl lid 92, ball 93, and described bearing 91 is provided with rounded channels 911; Described pearl lid 92 is provided with sphere hole 921 and countersunk screw hole 922; Described ball 93 is connected between above-mentioned bearing 91 and pearl lid 92 by sunk screw 94, and described ball 93 is energy flexible rotating also; Above-mentioned bearing 91 is connected on bed die 7 by bolt 95; When blank advances time, be pressed on ball 93, because ball can along all directions flexible rotating, so no matter longitudinally still transverse shifting blank is just very easy and convenient.

Wherein, described blank centering body 8 comprises vertical rod 81, regulating arm 82, and described vertical rod 81 is provided with vertical rod hole 811, and the base plate of described vertical rod 81 is connected with bearing 83 by bolt, and described bearing 83 is welded in frame 1; Described regulating arm 82 one end screw rod 821, the screw rod other end is welded to connect on baffle plate 822; Described screw rod 821 is coupled together with vertical rod 81 by vertical rod hole 811 and nut 84; By adjusting the position of regulating arm 82, make regulating arm overhead gage 822 and bed die 7 distance between center line be the half W/2 of blank width W, blank comes on baffle plate 822 just can centering; After such centering, the U-shaped beam size symmetrical squeezed out, product is qualified.

Beneficial effect of the present invention is: compact conformation is simple, occupation of land is few, hydraulic control, and easy to operate, product undercarriage is easily convenient; The application is provided with joist device, when U-shaped beam is just from the bed die demoulding, just rolled jack-up by the multiple joists in joist device, and joist roll inside be provided with bearing can flexible rotating, therefore the U-shaped beam of finished product just can not can release frame from stripper plate easily by other instrument (as little round steel etc. does roller), hang away with crane again, this cleverly joist device to achieve product undercarriage easily convenient; The U-shaped beam once suppressed by upper and lower mould can ensure that dimensionally stable, quality are good, forming speed is fast, can process the U-shaped beam of same width with same thickness of slab blank; Bending cylinder piston rod is connected with mold by piston Connection Block, and such anatomical connectivity bolt is few, dismounting quick, maintain and replace mould is convenient; Bed die is connected with frame by L shape pressing plate, even if fixing threaded hole position exists relatively large deviation in such syndeton frame, bed die can be fixed on tram, Joining Technology is ingenious; Could rise bottom knockout oil cylinder again after (by fluid pressure linkage system) must first rise mold during the finished product demoulding, order can ensure the disposable smooth fast demoulding of finished product like this, solves finished product and is stuck in the problem of can not getting out in bed die groove; Multiple bottom knockout oil cylinder is connected to stripper plate, and bottom U-shaped beam the U-shaped corbel be stuck in groove out by stripper plate holder, such whole piece U-shaped beam stress uniform shape does not change, and ensures that finished appearance quality is good; Bead assist device can ensure that travelling stock is easy and convenient, because ball can along all directions flexible rotating in bead assist device, can play booster action regardless of the ball in bead assist device when longitudinal direction or transverse shifting blank, travelling stock is easily laborsaving; Blank centering device controls blank and enters after above bed die, the center line that must control blank before compacting is identical with the center line of mould, although the blank that different in width is often criticized in processing needs the regulating arm in adjustment blank centering device, but this structure simply adjusts also not difficult, the product size symmetry that this makes it possible to ensure to suppress out is qualified, yield rate is high; As long as this equipment one people can complete production operation under having crane to assist; Therefore the U-shaped beam that the present invention produces can reach that quality is good, the demoulding easily, product undercarriage is convenient, yield rate is high, production efficiency is high, labour intensity is little, less with labour, the effect such as save production cost.

Accompanying drawing explanation

Fig. 1 existing U-lag steel beam structure schematic diagram;

Fig. 2 structural front view of the present invention;

Fig. 3 is the side view of Fig. 2;

Fig. 4 mid frame structural upright of the present invention schematic diagram;

Bending oil cylinder syndeton schematic diagram in Fig. 5 the present invention;

Fig. 6 is the piston connecting base structure schematic diagram in Fig. 5;

Fig. 7 is the inserted sheet latch structure schematic diagram in Fig. 5;

Upper die structure schematic diagram in Fig. 8 the present invention;

Lower die structure and be fixedly connected with schematic diagram in Fig. 9 the present invention;

The front partial schematic diagram of stripper plate rising of joist device in Figure 10 the present invention;

The rear partial schematic diagram of stripper plate rising of joist device in Figure 11 the present invention;

Figure 12 is the demoulding oil jar structural representation in Figure 10 or Figure 11;

Figure 13 is the stripper plate structural representation in Figure 10 or Figure 11;

Bead assist device structural representation in Figure 14 the present invention;

Blank centering body schematic diagram in Figure 15 the present invention.

Detailed description of the invention

Now by reference to the accompanying drawings, the specific embodiment of the invention is described in detail in detail:

As shown in Figure 2 and Figure 3, a kind of U-shaped beam extruder with blank centering body and joist device, comprise frame 1, bending oil cylinder 2, mold 4, bed die 7, joist device 60, hydraulic system 30, blank centering body 8, bead assist device 9, described multiple bending oil cylinder 2 cylinder body is connected on the cylinder flange seat 13 of described frame 1 entablature; Described bending oil cylinder 2 piston rod is connected with described mold 4 by piston Connection Block 26, inserted sheet pin 25, bolt 27; Described bed die 7 is connected with frame 1 with bolt by L shape pressing plate 75, bed die fixing threaded hole position relatively large deviation in such permission frame, bed die 7 can be fixed on tram, and utilize the elastic reaction of L shape pressing plate 75, bed die be connected more firm; Described joist device 60 is connected between frame 1 and bed die 7, joist device 60 comprises multiple demoulding oil jar, one piece of stripper plate, multiple joist roll, when demoulding oil jar works, stretching out piston rod drives stripper plate to rise, after stripper plate rising puts in place, joist rolls also can along with the upper surface reaching stripper plate; U-shaped beam in bed die 7 after extrusion molding, can be tightly stuck in bed die groove, needs stripper plate in joist device 60 U-shaped back out; Described bead assist device 9 is connected on bed die 7, when blank advances time, is pressed on the ball on bead assist device 9, and because ball can along all directions flexible rotating, so no matter longitudinally still transverse shifting blank is just very easy and convenient; Described two blank centering bodies 8 to be connected in frame 1 and to be arranged near bed die 7 two ends; The a collection of U-shaped beam of usual processing, wherein a collection of blank width is identical (if width is W), regulate the regulating arm in blank centering body 8, the distance between center line of regulating arm one end-stopping plate and bed die 7 is made to be W/2, the blank being W when width like this advances, and after being close to the baffle plate in blank centering body 8, at this moment blank is with regard to centering, the U-shaped beam size symmetrical squeezed out, product is qualified; Described hydraulic system 30 is arranged on frame 1 top or can is independently arranged near frame, is connected to bending oil cylinder 2 and demoulding oil jar, controls corresponding cylinder efficient by hydraulic oil pipe system by oil circuit; Blank is come by crane for hoisting, and blank one end is inserted into above bed die 7 from frame side feed opening, inserts after half and unloads crane gib head, more manually blank push completely carry out above bed die compressing; After blank is compressing in bed die, demoulding oil jar (this order condition controls by oil circuit self-locking system) could be risen again after must first rising mold 4, the U-shaped beam of such shaping can tightly be stuck in bed die groove, can avoid producing folder mold problem; And then rise stripper plate, the U-shaped beam be shaped from the demoulding in bed die 7; Roll owing to being provided with multiple joist in joist device 60, when U-shaped beam is after bed die 7 demoulding, now multiple joist rolls the upper surface all stretching out stripper plate 6, hold in the palm bottom U-shaped beam, each joist rolls can flexible rotating, creates booster action, and such operating personnel just easily can release frame the U-shaped beam be shaped from the joist side of rolling on like a cork, hang away with crane again, complete a working cycles.

As shown in Figure 4, described frame 1 comprises multiple closed memorial archway 11, described closed memorial archway 11 is welded by steel plate or shaped steel, and between described closed memorial archway 11, top is coupled together by the entablature 12 of Plate Welding, is welded with cylinder flange dish 13 for connecting bending oil cylinder below described entablature 12; Between described closed memorial archway 11, bottom is coupled together by the lower box-girder 14 of Plate Welding, and described lower box-girder 14 is provided with mould oil cylinder holes 15 and bed die fixing threaded hole 16 above; Described lower box-girder 14 inside is provided with demoulding oil jar and connects bearing for fixing demoulding oil jar; Be provided with lower margin hole 17 bottom described closed memorial archway 11 to can be used for being connected with foot bolt fundamentally, ensure that frame is more stable.

As shown in Fig. 5, Fig. 6, Fig. 7, described bending oil cylinder 2 cylinder body is provided with flange connecting hole 21, and piston rod is provided with spill circle 22; Described bending oil cylinder 2 piston is coupled together with bolt 27 by piston Connection Block 26 and two panels inserted sheet pin 25; Described piston Connection Block 26 is provided with piston hole 261 and cotter way 263 and screw 262; Described inserted sheet pin 25 is provided with arc groove 251 and through hole 252, the spill circle 22 on the arc groove 251 seized piston bar on inserted sheet pin, and such bending oil cylinder 2 has connected with piston Connection Block 26.

As shown in Figure 8, described mold 4 becomes box girder structure by Plate Welding, and piston Connection Block 26 is welded on above described mold 4.

As shown in Figure 9, described bed die 7 is welded by two pieces of risers 71 and base plate 72 and some gussets 73; Described base plate is arranged multiple large round mouth 74 to be connected with stripper plate for allowing the piston rod of demoulding oil jar extend there through; Described base plate 72 is also provided with the rigging position of multiple joist hole 722 for providing joist to roll bindiny mechanism; Connecting hole 76 is provided with for connecting bead assist device in the both sides of base plate 72; The multiple L shape pressing plate 75 in described bed die 7 both sides is connected with frame with bolt 77; Described L shape pressing plate 75 is provided with through hole 751 for connecting bolt.

As shown in Figure 10, Figure 11, Figure 12, Figure 13, described joist device 60 comprises multiple demoulding oil jar 5, one piece of stripper plate 6, multiple joist and rolls 601, described demoulding oil jar 5 back seat is provided with connecting hole 51 for being connected with frame, and piston rod is provided with connecting screw hole 52 for being connected with stripper plate, the piston rod of demoulding oil jar 5 is connected with stripper plate 6 with the large round mouth 74 on bed die through the mould oil cylinder holes 15 in frame, described stripper plate 6 is provided with multiple counter sink 61, multiple idler pulley mouth 62 and hinged seat 63, described hinged seat 63 is provided with pin-and-hole 631, above-mentioned joist roll 601 inside be provided with bearing and by bearing pin A602 with stick up bar 603 one end and be connected, described sticking up in the middle part of bar 603 is connected with the hinged seat 63 on above-mentioned stripper plate by bearing pin B604, the described other end sticking up bar 603 is connected with connecting rod 606 by bearing pin C605, described connecting rod 606 other end is connected with fork 608 by bearing pin D607, described fork 608 other end is connected with Connection Block 610 by bearing pin E609, and described Connection Block 610 is fixedly connected in frame 1, when U-shaped beam is after bed die 7 internal shaping before the demoulding, joist in joist device 60 rolls 601 and is in the idler pulley mouth 62 of stripper plate 6, in time starting the demoulding, demoulding oil jar 5 works, piston rod stretches out and rises with stripper plate 6, stripper plate 6 gradually ejects bed die 7 U-shaped beam finished product, joist in this time joist device 60 rolls 601 also along with stripper plate 6 is toward rising, until demoulding oil jar 5 piston rod stretches out when putting in place, joist rolls 601 and also stretches out stripper plate 6 upper surface U-shaped corbel, due to each joist roll 601 inside bearing is housed can flexible rotating, such operating personnel just can push away away the U-shaped beam be shaped like a cork above joist rolls 601.

As shown in figure 14, described bead assist device 9 comprises bearing 91, pearl lid 92, ball 93, and described bearing 91 is provided with rounded channels 911; Described pearl lid 92 is provided with sphere hole 921 and countersunk screw hole 922; Described ball 93 is connected between above-mentioned bearing 91 and pearl lid 92 by sunk screw 94, and described ball 93 is energy flexible rotating also; Above-mentioned bearing 91 is connected on bed die 7 by bolt 95; When blank advances time, be pressed on ball 93, because ball can along all directions flexible rotating, so no matter longitudinally still transverse shifting blank is just very easy and convenient.

As shown in figure 15, described blank centering body 8 comprises vertical rod 81, regulating arm 82, and described vertical rod 81 is provided with vertical rod hole 811, and the base plate of described vertical rod 81 is connected with bearing 83 by bolt, and described bearing 83 is welded in frame 1; Described regulating arm 82 one end screw rod 821, the screw rod other end is welded to connect on baffle plate 822; Described screw rod 821 is coupled together with vertical rod 81 by vertical rod hole 811 and nut 84; By adjusting the position of regulating arm 82, make regulating arm overhead gage 822 and bed die 7 distance between center line be the half W/2 of blank width W, blank just can centering, and after such blank centering, the U-shaped beam size symmetrical squeezed out, product is qualified.

Claims (8)

1. the U-shaped beam extruder with blank centering body and joist device, it is characterized in that: comprise frame (1), bending oil cylinder (2), mold (4), bed die (7), joist device (60), hydraulic system (30), blank centering body (8), bead assist device (9), described multiple bending oil cylinder (2) cylinder body is connected on described frame (1) entablature (12); Described bending cylinder piston rod is connected with described mold (4) by piston Connection Block (26); Described bed die (7) is fixed in frame (1) by L shape pressing plate (75) and bolt (77); Described joist device (60) is connected between frame (1) and bed die (7); Described multiple bead assist device (9) is connected on bed die (7); Described two blank centering bodies (8) are connected to frame (1) and go up and be arranged near bed die (7) two ends; Described hydraulic system (30) is arranged on frame (1) top or can is independently arranged near frame, connects each corresponding operating cylinder by oil circuit.

2. a kind of U-shaped beam extruder with blank centering body and joist device according to claim 1, it is characterized in that: described frame (1) comprises multiple closed memorial archway (11), described closed memorial archway (11) is welded by steel plate or shaped steel, between described closed memorial archway (11), top is coupled together by the entablature (12) of Plate Welding, and described entablature (12) below is welded with cylinder flange dish (13); Between described closed memorial archway (11), bottom is coupled together by the lower box-girder (14) of Plate Welding, and described lower box-girder (14) is provided with mould oil cylinder holes (15) and bed die fixing threaded hole (16) above; Described lower box-girder (14) inside is provided with demoulding oil jar and connects bearing; Described closed memorial archway (11) bottom is provided with lower margin hole (17).

3. a kind of U-shaped beam extruder with blank centering body and joist device according to claim 1, it is characterized in that: described bending oil cylinder (2) cylinder body is provided with flange connecting hole (21), and piston rod is provided with spill circle (22); Described bending oil cylinder (2) piston rod is coupled together with bolt (27) by piston Connection Block (26) and two panels inserted sheet pin (25); Described piston Connection Block (26) is provided with piston hole (261) and cotter way (263) and screw (262); Described inserted sheet pin (25) is provided with arc groove (251) and through hole (252).

4. a kind of U-shaped beam extruder with blank centering body and joist device according to claim 1, is characterized in that: described mold (4) becomes box girder structure by Plate Welding; Described mold (4) top is welded with piston Connection Block (26).

5. a kind of U-shaped beam extruder with blank centering body and joist device according to claim 1, is characterized in that: described bed die (7) is welded by two pieces of risers (71) and one piece of base plate (72) and some gussets (73); Described base plate (72) is arranged several large round mouths (74) and joist hole (722); Described base plate (72) both sides are provided with connecting hole (76); Described bed die (7) both sides are connected with frame with bolt (77) with multiple L shape pressing plate (75); Described L shape pressing plate (75) is provided with through hole (751).

6. a kind of U-shaped beam extruder with blank centering body and joist device according to claim 1, it is characterized in that: described joist device (60) comprises multiple demoulding oil jar (5), one piece of stripper plate (6), multiple joist roll (601), described demoulding oil jar (5) back seat is provided with connecting hole (51), piston rod is provided with connecting screw hole (52), described stripper plate (6) is provided with counter sink (61), idler pulley mouth (62) and hinged seat (63), described demoulding oil jar (5) back seat is connected with frame (1), and the piston rod of described demoulding oil jar is connected with stripper plate (6) through the large round mouth (74) of bed die (7), above-mentioned joist roll (601) inside be provided with bearing and by bearing pin A (602) with stick up bar (603) one end and be connected, described bar (603) middle part of sticking up is connected with the hinged seat (63) on above-mentioned stripper plate by bearing pin B (604), the described other end sticking up bar (603) is connected with connecting rod (606) by bearing pin C (605), described connecting rod (606) other end is connected with fork (608) by bearing pin D (607), described fork (608) other end is connected with Connection Block (610) by bearing pin E (609), described Connection Block (610) is fixedly connected in frame (1).

7. a kind of U-shaped beam extruder with blank centering body and joist device according to claim 1, it is characterized in that: described bead assist device (9) comprises bearing (91), Zhu Gai (92), ball (93), described bearing (91) is provided with rounded channels (911); Described Zhu Gai (92) is provided with sphere hole (921) and countersunk screw hole (922); Described ball (93) is connected between above-mentioned bearing (91) He Zhugai (92) by screw (94), and described ball (93) also can flexible rotating; Above-mentioned bearing (91) is connected on bed die (7) by bolt (95).

8. a kind of U-shaped beam extruder with blank centering body and joist device according to claim 1, it is characterized in that: described blank centering body (8) comprises vertical rod (81), regulating arm (82), described vertical rod (81) is provided with vertical rod hole (811), the base plate of described vertical rod (81) is connected with bearing (83) by bolt, and described bearing (83) is welded in frame (1); Described regulating arm (82) one end screw rod (821), the screw rod other end is welded to connect on baffle plate (822); Described screw rod (821) is coupled together with vertical rod (81) by vertical rod hole (811) and nut (84).