CN112387824A - Lower die device for straight welded pipe forming machine - Google Patents
Lower die device for straight welded pipe forming machine Download PDFInfo
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- CN112387824A CN112387824A CN202011122206.3A CN202011122206A CN112387824A CN 112387824 A CN112387824 A CN 112387824A CN 202011122206 A CN202011122206 A CN 202011122206A CN 112387824 A CN112387824 A CN 112387824A
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- lower die
- die base
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
Abstract
The invention discloses a lower die device for a straight welded pipe forming machine, which comprises: a lower die base; a pair of movable die openings on the top surface of the lower die base, wherein second saw-shaped teeth meshed with the first saw-shaped teeth of the lower die base are machined on the bottom surface of the movable die openings; the locking hydraulic cylinder is used for moving the movable die opening close to and away from the lower die base; two opening degree adjusting device, it includes: a motor having an output shaft and an encoder; a rack and pinion seat; the output shaft of the motor passes through the through hole of the gear rack seat and is connected to the gear; each rack is provided with a convex pulling seat; the two concave shifting seats are used for being clamped with the convex shifting seat, and the opening degree is automatically adjusted through the opening degree adjusting device under the condition that the movable die opening is separated from the lower die base; after the adjustment is completed, the movable die orifice is moved closer to the lower die base to engage therewith. The invention has high automation degree, can realize high-efficiency adjustment of the opening degree of the forming die, thereby improving the use efficiency of the forming machine, reducing the labor intensity and realizing high-efficiency replacement of the lower die.
Description
Technical Field
The invention relates to the technical field of metal plate processing and forming, in particular to a lower die device for a straight welded pipe forming machine.
Background
The lower forming die of the longitudinal submerged arc welded pipe forming machine, called the lower die for short, is an important forming tool, the opening degree of the lower forming die is often required to be adjusted according to the process, and the opening degree adjustment amount of the lower forming die is often more than one hundred millimeters in order to adapt to the specifications of different pipes. The opening degree of the lower die of the forming machine in the prior art is manually adjusted, so that the labor intensity is high and the efficiency is low. Moreover, the lower mold is a worn part and needs to be replaced periodically. However, the lower mold of the prior art is generally designed to be directly fixed on the lower mold base by using a fastener, as shown in fig. 5, since the length of the steel pipe is often more than 10 meters, the corresponding lower mold is also long, and finally, the lower mold adopting the above scheme is difficult to disassemble and assemble.
Accordingly, there is a need in the art for a new lower die assembly for a straight seam pipe forming machine that eliminates or at least alleviates some or all of the above-mentioned deficiencies in the prior art.
Disclosure of Invention
In view of the above technical problems in the prior art, an object of the present invention is to provide a lower die device for a longitudinal submerged arc welded pipe forming machine, which has high automation degree and can efficiently adjust the opening degree of a forming die, thereby improving the use efficiency of the forming machine and reducing the labor intensity. Furthermore, the invention can realize the efficient replacement of the lower die, further improve the efficiency and reduce the labor intensity.
It is emphasized that, unless otherwise indicated, the terms used herein correspond to the ordinary meanings of the various technical and scientific terms in the art, and the meanings of the technical terms defined in the various technical dictionaries, textbooks, etc.
To this end, according to an embodiment of the present invention, there is provided a lower die apparatus for a straight welded pipe forming machine, wherein the lower die apparatus includes:
the top surface of the lower die base extends along the longitudinal direction, a first saw-shaped tooth is machined on the top surface of the lower die base, and a plurality of slotted holes are formed in the top of the lower die base, wherein the slotted holes comprise first slotted holes respectively located at two longitudinal end parts of the lower die base and a plurality of second slotted holes located between the two first slotted holes;
the pair of movable die openings are arranged on the top surface of the lower die base and are symmetrically arranged on two sides of the longitudinal center line of the lower die base in a transversely movable mode, and the bottom surface of each movable die opening is provided with a second saw-shaped tooth which is used for being meshed with the first saw-shaped tooth of the lower die base;
the locking hydraulic cylinder is arranged in the second slot hole of the lower die base, is connected to the pair of movable die orifices in a telescopic mode, and is used for driving the pair of movable die orifices to move close to and separate from the lower die base and locking the pair of movable die orifices in position relative to the lower die base when the pair of movable die orifices move to required positions;
lie in the lower mould base with two opening degree adjusting device between a pair of activity die orifice, it is located the first slotted hole of lower mould base respectively, and every opening degree adjusting device all includes:
a motor installed in a longitudinal end of the lower mold base and having an output shaft extending in a height direction of the lower mold base and an encoder;
the gear rack seat is arranged at the top of the lower die base and is positioned right above the motor, and a through hole is formed in the bottom surface close to the motor;
a gear rotatably disposed in the rack and pinion stand, wherein an output shaft of the motor is connected to the gear through a through hole of the rack and pinion stand;
a pair of racks installed in the rack seats in a laterally movable manner and respectively provided at both longitudinal sides of the gear to be engaged with the gear, wherein each rack is provided with a convex pulling seat protruding from the rack to the outside of the top of the lower mold base;
two concave pulling seats fixedly arranged at the bottom surface of the movable mould mouth at the position corresponding to the convex pulling seat so as to be clamped with the convex pulling seat;
the opening degree between the pair of movable die openings is automatically adjusted through the opening degree adjusting device under the condition that the pair of movable die openings are separated from the lower die base by means of the locking hydraulic cylinder; and after the opening degree adjustment is completed, the pair of movable die openings are moved close to the lower die base by means of the locking hydraulic cylinder to be engaged with the lower die base.
Further, in an embodiment, the lower mold base may include a row of mounting holes regularly arranged in a longitudinal direction thereof penetrating the lower mold base in a height direction of the lower mold base, the mounting holes may be spaced apart from each other, and may include first mounting holes installed at both longitudinal ends of the lower mold base, and a second mounting hole located between the two first mounting holes.
Further, in an embodiment, the motor may be mounted in the first mounting hole at the longitudinal end of the lower mold base.
Further, in one embodiment, the motor may be a reduction motor.
Further, in one embodiment, the locking cylinder may have rollers.
Further, in one embodiment, the locking cylinder may be i-shaped.
Further, in an embodiment, the movable die may be provided at the bottom surface with a guide groove corresponding to the locking cylinder for receiving and guiding the piston of the locking cylinder.
Further, in an embodiment, the lower die device may further include a passive conveying roller mounted in the second mounting hole of the lower die base and an internal hydraulic cylinder located below the passive conveying roller, wherein the passive conveying roller is driven by the internal hydraulic cylinder to lift and lower for supporting the pipe molded by the straight welded pipe molding machine.
Further, in an embodiment, the pair of movable dies may further include a pair of lower die holders provided on sides thereof facing each other, the lower die holders having a rectangular or square cross section, and the pair of lower die holders may be provided with a cylindrical hole having a notch at a portion for contacting the pipe molded by the straight seam pipe molding machine, for removably inserting the cylindrical lower die.
Further, in an embodiment, each of the pair of movable dies may further include a lower die shaft end baffle provided at both longitudinal ends thereof for sealing the lower die at both longitudinal ends to prevent the lower die from being separated from the cylindrical hole of the lower die base.
The lower die device for the straight welded pipe forming machine provided by the embodiment of the invention has the following beneficial effects:
firstly, the invention has high automation degree, and can realize high-efficiency adjustment of the opening degree of the forming die, thereby improving the use efficiency of the forming machine and reducing the labor intensity.
Secondly, the invention can realize the efficient replacement of the lower die, further improve the efficiency and reduce the labor intensity.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a front view schematically showing a lower die apparatus for a straight welded pipe forming machine according to an embodiment of the present invention;
FIG. 2 schematically shows a top view of the lower die apparatus for a straight seam pipe molding machine of FIG. 1;
FIG. 3 schematically shows a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 schematically shows a cross-sectional view taken along line B-B of FIG. 1;
fig. 5 schematically shows a schematic configuration diagram of a lower mold device of a molding machine in the related art.
Description of the element reference numerals
1: a lower die shaft end baffle; 2: a rack and pinion seat; 3: a guide groove; 4: a locking type hydraulic cylinder; 5: a rack; 6: a gear; 7: a motor; 8: a passive delivery roller; 9: a lower die base; 91: a longitudinal centerline; 10: a movable die orifice; 11: a concave dial seat; 12: a convex shifting seat; 13: a cylindrical lower die; 14: a lower die holder; 15: mounting holes; 151: a first mounting hole; 152: a second mounting hole; 100: a lower die device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.
Referring to fig. 1 to 4, there is shown a lower die apparatus 100 for a straight seam pipe forming machine according to an embodiment of the present invention, wherein the lower die apparatus 100 includes:
the lower die base 9 extends along the longitudinal direction, a first saw-shaped tooth is processed on the top surface of the lower die base 9, and a plurality of slotted holes are formed in the top of the lower die base, wherein the slotted holes comprise first slotted holes respectively located at two longitudinal end parts of the lower die base 9 and a plurality of second slotted holes located between the two first slotted holes;
a pair of movable die orifices 10 arranged on the top surface of the lower die base 9 and symmetrically arranged on two sides of the longitudinal central line 91 of the lower die base 9 in a manner of moving along the transverse direction, and the bottom surface of each movable die orifice 10 is provided with a second saw-shaped tooth used for being meshed with the first saw-shaped tooth of the lower die base 9;
a locking hydraulic cylinder 4 which is installed in a second slot of the lower die base 9 and is connected to the pair of movable die orifices 10 in a telescopic manner, and is used for driving the pair of movable die orifices 10 to move close to and separate from the lower die base 9 and locking the pair of movable die orifices 10 in position relative to the lower die base 9 when the pair of movable die orifices 10 are moved to required positions;
be located lower mould base 9 with two opening degree adjusting device between a pair of movable mould mouth 10, it is located the first slotted hole of lower mould base 9 respectively, and every opening degree adjusting device all includes:
a motor 7 installed in a longitudinal end portion of the lower mold base 9 and having an output shaft extending in a height direction of the lower mold base 9 and an encoder;
the gear rack seat 2 is arranged at the top of the lower die base 9 and is positioned right above the motor 7, and a through hole is formed in the bottom surface close to the motor 7;
a gear 6 rotatably disposed in the rack and pinion holder 2, wherein an output shaft of the motor 7 is connected to the gear 6 through a through hole of the rack and pinion holder 2;
a pair of racks 5 installed in the rack holder 2 in a laterally movable manner and respectively provided at both longitudinal sides of the gear 6 to be engaged with the gear 6, wherein each rack 5 is provided with a convex pulling seat 12 protruding from the rack 5 to the outside of the top of the lower mold base 9;
two concave pulling seats 11 fixedly installed at the bottom surface of the movable die orifice 10 at positions corresponding to the convex pulling seats 12 to be engaged with the convex pulling seats 12;
wherein, the opening degree between the pair of movable die openings 10 is automatically adjusted by an opening degree adjusting device under the state that the pair of movable die openings 10 are separated from the lower die base 9 by the locking type hydraulic cylinder 4; and, after the opening degree adjustment is completed, the pair of movable gates 10 are moved close to the lower die base 9 by means of the locking hydraulic cylinder 4 to be engaged with the lower die base 9.
In one embodiment, as shown in fig. 3, the lower mold base 9 may include a row of mounting holes 15 regularly arranged in a longitudinal direction thereof penetrating the lower mold base 9 in a height direction of the lower mold base 9, the mounting holes 15 being spaced apart from each other, and may include first mounting holes 151 mounted at both longitudinal ends of the lower mold base 9, and second mounting holes 152 located between the two first mounting holes 151.
Further, the motor 7 may be installed in the first installation hole 151 of the longitudinal end of the lower mold base 9.
Further, the motor 7 may be a reduction motor.
In one embodiment, the locking cylinder 4 may be provided with rollers. Further, the locking cylinder 4 may be i-shaped.
In one embodiment, as shown in fig. 1, the movable die 10 may be provided at the bottom surface with a guide groove 3 corresponding to the locking cylinder 4 for receiving and guiding the piston of the locking cylinder 4.
In an embodiment, as shown in fig. 3, the lower die device 100 may further include a passive delivery roller 8 installed in the second installation hole 152 of the lower die base 9 and an internal hydraulic cylinder located below the passive delivery roller 8, wherein the passive delivery roller 8 may be driven by the internal hydraulic cylinder to be lifted for holding the pipe molded by the straight seam pipe molding machine.
In one embodiment, as shown in fig. 4, the pair of movable dies 10 may further include a pair of lower die holders 14 provided on sides thereof facing each other, and having a rectangular or square cross section, and the lower die holders 14 may be provided with a cylindrical hole having a notch at a portion for contacting the pipe molded by the straight pipe molding machine, for removably inserting the cylindrical lower die 13.
In one embodiment, as shown in fig. 1, each of the pair of movable dies 10 may further include lower die shaft end dams 1 provided at both longitudinal ends thereof for sealing the lower die 13 at both longitudinal ends to prevent the lower die 13 from being removed from the cylindrical hole of the lower die base 14.
The following describes, by way of example, a lower die apparatus 100 for a straight seam pipe forming machine according to an embodiment of the present invention.
Referring to fig. 1 to 4, a lower die apparatus 100 for a straight welded pipe forming machine includes:
a lower die base 9, the top surface of which is provided with a first saw-shaped tooth, and the top of which is provided with a plurality of slotted holes, wherein the slotted holes comprise first slotted holes respectively positioned at two longitudinal ends of the lower die base 9 and a plurality of second slotted holes positioned between the two first slotted holes;
a plurality of I-shaped lifting locking hydraulic cylinders 4 which are arranged on the lower die base 9 in a straight line and are respectively provided with a roller;
a plurality of passive conveying rollers 8 driven by built-in hydraulic cylinders to lift are respectively positioned between two adjacent locking hydraulic cylinders 4;
set up two opening degree adjusting device at lower mould base 9 both ends respectively along lower mould base 9 vertically, every opening degree adjusting device all can include: the device comprises a gear motor 7 with an encoder, a gear 6 connected with an output shaft of the gear motor 7, two racks 5 respectively arranged at two longitudinal sides of the gear 6 to be meshed with the gear 6, a rack and pinion seat 2 used for accommodating the racks 5 and the gear 6, two concave shifting seats 11 fixedly arranged on the bottom surface of a movable die orifice 10, and two convex shifting seats 12 fixedly arranged on the racks 5 and matched with the concave shifting seats 11;
a pair of movable die orifices 10 positioned on the top surface of the lower die base 9 and symmetrically arranged on both sides of the longitudinal center line of the lower die base 9 in a manner of moving along the transverse direction, and second saw-shaped teeth for being meshed with the first saw-shaped teeth of the lower die base 9 are processed on the bottom surface of the movable die orifices 10; the movable die orifice 10 can also comprise a plurality of guide grooves 3; a plurality of lower die holders 14; a plurality of cylindrical lower molds 13; four lower die shaft end baffles 1.
The working principle of the invention is as follows:
the lower die base 9 and the movable die orifice 10 can be respectively provided with a first saw-shaped tooth and a second saw-shaped tooth which are meshed with each other on the contact surfaces which are butted with each other, so that the positioning and the bearing forming force of relevant parts such as the movable die orifice 10 and the lower die base 14 thereon, the cylindrical lower die 13, a pipe piece formed by a straight seam pipe forming machine and the like in the opening degree direction or the transverse direction can be realized.
The lower die base 9 can also be provided with slotted holes for installing the following parts: an I-shaped lifting locking hydraulic cylinder 4 with a roller and an opening degree adjusting device. The slots may include a first slot for receiving the openness adjusting device and a plurality of second slots for mounting the locking cylinders 4. The lower mold base 9 may further include mounting holes 15, and the mounting holes 15 may include first mounting holes 151 for mounting the motor 7, and second mounting holes 152 for mounting the passive feed rollers 8 and built-in hydraulic cylinders located below the passive feed rollers 8.
The bottom surfaces of the two movable die openings 10 facing the lower die base 9 can be provided with guide grooves 3, and the guide grooves 3 can be provided with notches corresponding to the locking hydraulic cylinders 4.
The two movable dies 10 can also each be fitted with a lower die holder 14 at the top facing away from the lower die base 9, wherein the two lower die holders 14 can be provided with a cylindrical hole with a notch on the sides facing each other for fitting the lower die 13. After the lower mold 13 is installed in the cylindrical hole, the two ends of the movable die orifice 10 can be respectively sealed by the four lower mold shaft end baffles 1 to prevent the lower mold 13 from escaping from the cylindrical hole of the lower mold base 14.
The lower die structure at least has the following advantages: firstly, when the lower die 13 is disassembled, the lower die shaft end baffles 1 at two ends of the movable die orifice 10 are respectively disassembled, then the waste lower die 13 is longitudinally pulled out from the lower die seat 14, then a new lower die 13 is longitudinally inserted into a cylindrical hole of the lower die seat 14, and finally the lower die shaft end baffles 1 at two ends are installed, so that the disassembly and the assembly of the lower die 13 can be completed, and the work of disassembling and assembling fasteners is greatly saved; second, the use of rolling friction instead of sliding friction reduces molding resistance and helps to improve molding quality.
When the opening degree of the lower die 13 is adjusted, a piston rod of an I-shaped lifting locking type hydraulic cylinder 4 with a roller extends out, and the movable die orifice 10 and a part arranged on the movable die orifice are jacked up until the movable die orifice 10 is separated from the meshing rectangular teeth of the lower die base 9 by a certain distance; then, gear 6 is driven to rotate by gear motors 7 at the two longitudinal ends, so as to drive rack 5 to move transversely in rack and pinion seat 2, convex shifting seat 12 on rack 5 can drive concave shifting seat 11 which is meshed to move transversely together, and then synchronous and reverse movement can be realized between two movable dies 10 which are provided with concave shifting seats 11.
After the opening degree is adjusted to a proper position, the speed reducing motor 7 can stop running, so that the gear 6, the rack 5, the convex shifting seat 12, the concave shifting seat 11 and the two movable dies 10 stop, and the piston rod of the locking type hydraulic cylinder 4 can retract to drive the movable dies 10 provided with the guide grooves 3 to descend and tightly press the movable dies on the lower die base 9, thereby completing the adjustment of the opening degree of the lower die.
The driven conveying roller 8 driven by the built-in hydraulic cylinder to lift acts as follows: after the molding of the molded pipe fitting is finished, the piston rod of the built-in hydraulic cylinder extends out to drive the driven conveying roller 8 on the piston rod to ascend to support the molded pipe fitting, so that the resistance of the molded pipe fitting when the molded pipe fitting is pushed out longitudinally is changed into rolling friction, the resistance is reduced, and the surface quality of the molded pipe fitting is improved. During forming, the piston of the built-in hydraulic cylinder can be retracted to bring the driven delivery roller 8 thereon down, thereby avoiding the driven delivery roller 8 from contacting the molded tube.
The invention is especially suitable for large longitudinal submerged arc welded pipe forming machines.
In conclusion, the lower die device 100 for the straight welded pipe forming machine according to the embodiment of the invention has high automation degree, and can realize efficient adjustment of the opening degree of the forming die, thereby improving the use efficiency of the forming machine and reducing the labor intensity. Furthermore, the invention can realize the quick replacement of the lower die by adopting a cylindrical lower die, a lower die seat and a lower die shaft end baffle plate, and realize the replacement of sliding friction resistance by rolling friction resistance, thereby reducing the forming resistance and improving the forming quality.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A lower die apparatus (100) for a straight welded pipe forming machine, comprising:
the top surface of the lower die base (9) extends along the longitudinal direction, a first saw-shaped tooth is machined on the top surface of the lower die base, and a plurality of slotted holes are formed in the top of the lower die base, wherein the slotted holes comprise first slotted holes respectively located at two longitudinal ends of the lower die base (9) and a plurality of second slotted holes located between the two first slotted holes;
a pair of movable die orifices (10) arranged on the top surface of the lower die base (9) and symmetrically arranged on two sides of a longitudinal central line (91) of the lower die base (9) in a transversely movable mode, and the bottom surface of each movable die orifice (10) is provided with a second saw-shaped tooth used for being meshed with the first saw-shaped tooth of the lower die base (9);
the locking hydraulic cylinder (4) is arranged in a second slot hole of the lower die base (9) and is connected to the pair of movable die orifices (10) in a telescopic mode, and is used for driving the pair of movable die orifices (10) to move close to and separate from the lower die base (9) and locking the pair of movable die orifices (10) in position relative to the lower die base (9) when the pair of movable die orifices (10) move to a required position;
be located lower mould base (9) with two opening degree adjusting device between a pair of activity die orifice (10), it is located lower mould base (9) first slotted hole respectively, and every opening degree adjusting device all includes:
a motor (7) which is installed in the longitudinal end of the lower die base (9) and has an output shaft extending in the height direction of the lower die base (9) and an encoder;
the gear rack seat (2) is arranged at the top of the lower die base (9) and is positioned right above the motor (7), and a through hole is formed in the bottom surface close to the motor (7);
a gear (6) rotatably disposed in the rack and pinion holder (2), wherein an output shaft of the motor (7) is connected to the gear (6) through a through hole of the rack and pinion holder (2);
a pair of racks (5) mounted in the rack-and-pinion seat (2) in a laterally movable manner and respectively provided on both longitudinal sides of the gear (6) to be engaged with the gear (6), wherein each rack (5) is provided with a convex pulling seat (12) protruding from the rack (5) to the outside of the top of the lower mold base (9);
two concave pulling seats (11) fixedly installed at the bottom surface of the movable die orifice (10) at positions corresponding to the convex pulling seats (12) so as to be clamped with the convex pulling seats (12);
wherein, the opening degree between the pair of movable die openings (10) is automatically adjusted by an opening degree adjusting device under the state that the pair of movable die openings (10) is separated from the lower die base (9) by the locking hydraulic cylinder (4); and, after the opening degree adjustment is completed, the pair of movable gates (10) is moved close to the lower die base (9) by means of the lock cylinder (4) to engage with the lower die base (9).
2. The lower die apparatus (100) for a straight welded pipe forming machine according to claim 1, wherein the lower die base (9) includes a row of mounting holes (15) regularly provided in a longitudinal direction thereof penetrating the lower die base (9) in a height direction of the lower die base (9), the mounting holes (15) being spaced apart from each other, and including first mounting holes (151) installed at both longitudinal ends of the lower die base (9), and a second mounting hole (152) located between the two first mounting holes (151).
3. The lower die apparatus (100) for a straight welded pipe forming machine according to claim 2, wherein the motor (7) is installed in the first installation hole (151) of the longitudinal end of the lower die base (9).
4. The lower die apparatus (100) for a straight welded pipe forming machine according to claim 1, wherein the motor (7) is a reduction motor.
5. The lower die apparatus (100) for a straight welded pipe forming machine according to claim 1, wherein the lock type hydraulic cylinder (4) is provided with a roller.
6. The lower die apparatus (100) for a straight welded pipe forming machine according to claim 1, wherein the locking type hydraulic cylinder (4) has an i-shape.
7. The lower die apparatus (100) for a straight seam pipe molding machine according to claim 6, wherein the movable die orifice (10) is provided at a bottom surface with a guide groove (3) corresponding to the lock type hydraulic cylinder (4) for receiving and guiding the piston of the lock type hydraulic cylinder (4).
8. The lower die apparatus (100) for a longitudinal pipe forming machine according to claim 3, further comprising a passive feed roller (8) installed in the second installation hole (152) of the lower die base (9) and a built-in hydraulic cylinder located below the passive feed roller (8), wherein the passive feed roller (8) is driven by the built-in hydraulic cylinder to be lifted and lowered for holding the pipe molded by the longitudinal pipe forming machine.
9. The lower die apparatus (100) for a longitudinal pipe forming machine according to claim 1, wherein the pair of movable dies (10) further comprises a pair of lower die holders (14) provided on sides thereof facing each other and having a rectangular or square cross section, the pair of lower die holders (14) having a cylindrical hole with a notch formed at a portion for contacting the pipe molded by the longitudinal pipe forming machine for removably inserting the cylindrical lower die (13).
10. The lower die apparatus (100) for a longitudinal welded pipe forming machine according to claim 9, wherein each of the pair of movable dies (10) further comprises lower die shaft end dams (1) provided at both longitudinal ends thereof for closing the cylindrical hole for inserting the lower die (13) at both longitudinal ends thereof to prevent the lower die (13) from being separated from the cylindrical hole of the lower die base (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011122206.3A CN112387824A (en) | 2020-10-20 | 2020-10-20 | Lower die device for straight welded pipe forming machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011122206.3A CN112387824A (en) | 2020-10-20 | 2020-10-20 | Lower die device for straight welded pipe forming machine |
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| CN112387824A true CN112387824A (en) | 2021-02-23 |
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| CN202011122206.3A Pending CN112387824A (en) | 2020-10-20 | 2020-10-20 | Lower die device for straight welded pipe forming machine |
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Application publication date: 20210223 |
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