CN110586772A - Forming pre-pressing structure - Google Patents
Forming pre-pressing structure Download PDFInfo
- Publication number
- CN110586772A CN110586772A CN201910899479.XA CN201910899479A CN110586772A CN 110586772 A CN110586772 A CN 110586772A CN 201910899479 A CN201910899479 A CN 201910899479A CN 110586772 A CN110586772 A CN 110586772A
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- Prior art keywords
- lower die
- pressing
- insert
- prepressing
- pressing plate
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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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
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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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
Abstract
The invention discloses a forming pre-pressing structure which can solve the problem that a forming die is troublesome all the time due to easy material running and wrinkling in an automobile stamping die, particularly under the condition of forming in a shape like a Chinese character 'ji', an upper insert cannot simultaneously press a lower material pressing plate and a middle groove when pressing a product, the forming process of the product is suspended, and the side line of the formed product is easy to irregularly deviate and the molded surface wrinkles. The mode of meeting such a condition selection among the prior art is glued for adding the excellence in the middle of the recess, and although this kind of mode is with low costs, and the mounting means that excellence was glued is also extremely convenient, but the easy fatigue damage of excellence glue in actual production not only causes the potential safety hazard easily, still appears the easy problem of running material, corrugating of forming die after the use of excellence glue a period of time in addition easily. The mold comprises an upper mold and a lower mold, wherein an upper mold insert is arranged at the bottom of the upper mold, and side frames are fixed on the outer walls of two sides of the lower mold.
Description
Technical Field
The invention relates to the field of automobile stamping dies, in particular to a forming pre-pressing structure.
Background
In automobile stamping die, forming die runs the material easily, corrugates always to be a more trouble problem, especially can meet the fashioned condition of several types, and such condition leads to inserting not pressing down flitch and middle recess product forming process simultaneously when pressing the product and is unsettled, and the easy random off tracking of product sideline and the corrugate of profile that the shaping came out. The mode of meeting such a condition selection among the prior art is glued for adding the excellence in the middle of the recess, and although this kind of mode is with low costs, and the mounting means that excellence was glued is also extremely convenient, but the easy fatigue damage of excellence glue in actual production not only causes the potential safety hazard easily, still appears the easy problem of running material, corrugating of forming die after the use of excellence glue a period of time in addition easily.
The publication number is: CN 205236769U's patent discloses a die stamping die presses material shaping and prevents mechanism of corrugating, compares with this application article, can't solve this application and propose: in automobile stamping die, forming die runs the material easily, corrugates always to be a more trouble problem, especially can meet the fashioned condition of several types, and such condition leads to inserting not pressing down flitch and middle recess product forming process simultaneously when pressing the product and is unsettled, and the easy random off tracking of product sideline and the corrugate of profile that the shaping came out. The mode of meeting such a condition selection among the prior art is glued for adding the excellence in the middle of the recess, and although this kind of mode is with low costs, and the mounting means that excellence was glued is also extremely convenient, but the easy fatigue damage of excellence glue in actual production not only causes the potential safety hazard easily, still appears the easy problem of running material, corrugating of forming die after the use of excellence glue a period of time in addition easily.
Disclosure of Invention
The invention aims to provide a forming pre-pressing structure which can solve the problem that in an automobile stamping die, the forming die is always troublesome in material running and wrinkling, particularly, the forming process of a product which is not simultaneously pressed to a lower pressing plate and a middle groove is suspended when an upper insert presses the product due to the fact that a plurality of shapes are formed, and the side line of the formed product is prone to irregular deviation and wrinkling of the molded surface. The mode of meeting such a condition selection among the prior art is glued for adding the excellence in the middle of the recess, and although this kind of mode is with low costs, and the mounting means that excellence was glued is also extremely convenient, but the easy fatigue damage of excellence glue in actual production not only causes the potential safety hazard easily, still appears the easy problem of running material, corrugating of forming die after the use of excellence glue a period of time in addition easily.
The purpose of the invention can be realized by the following technical scheme:
a forming and pre-pressing structure comprises an upper die and a lower die, wherein an upper die insert is arranged at the bottom of the upper die, side frames are fixed on the outer walls of two sides of the lower die, a plurality of uniformly distributed discharge pipes are connected to the bottom of the lower die, a pressing plate is arranged at the top of the lower die and is divided into two sections, namely a pressure plate n-shaped section located in the middle of the top end of the lower die and pressure plate straight-line sections located on two sides of the n-shaped section of the pressing plate, a groove is formed in the middle of the n-shaped section of the pressing plate, two butt-joint holes are formed in the bottom of the groove, and a lower die pre;
the lower die prepressing mechanism comprises a lower die prepressing insert and two pressing pieces, the lower die prepressing insert consists of an upper half part and a lower half part, the upper half part and the lower half part of the lower die prepressing insert are connected through a plurality of middle pneumatic telescopic rods, the bottom end of each middle pneumatic telescopic rod is connected with a middle cylinder, the middle cylinder is positioned inside the lower half part of the lower die prepressing insert, lower die pressing plates are connected to the outer walls of the two sides of the lower half part of the lower die prepressing insert respectively, one end of each of the two lower die pressing plates is connected with the lower half part of the lower die prepressing insert through a connecting block, a small cylinder is mounted at the end, away from each of the two lower die pressing plates, a pneumatic telescopic rod is connected to the side wall, away from each of the two small cylinders, and an extension pressing plate is connected, the bottom of the lower half part of the lower die pre-pressing material insert is provided with a pressing frame, the outer walls of two sides of the pressing frame are fixedly provided with a small hydraulic cylinder, the tops of the two small hydraulic cylinders are connected with a hydraulic telescopic rod, the top ends of the two hydraulic telescopic rods are respectively connected with a lower die pressing material plate, the bottom of the pressing frame is connected with two pressing pieces, and the two pressing pieces are respectively connected into the butt-joint holes at corresponding positions;
the casting die comprises a piston rod, a piston and a nitrogen groove, the nitrogen groove is arranged inside the casting die, nitrogen is flushed into the nitrogen groove, the top of the nitrogen groove is provided with the piston with the diameter matched with the inner diameter of the piston, the top of the piston is connected with the piston rod, the bottom of the piston is connected with an internal spring located inside the nitrogen groove, and the top of the piston is connected with the piston rod.
Preferably, the connecting block is L-shaped, and the connecting block is connected into the gap between the upper half part and the lower half part of the lower die prepressing insert.
Preferably, the upper die insert is matched with the material pressing plate.
Preferably, the two butting holes are respectively formed in two obliquely symmetrical corners in the groove, the two pressing pieces are respectively formed in the two obliquely symmetrical corners at the bottom of the pressing frame, the positions of the pressing pieces correspond to the butting holes, and the distance between the two pressing pieces is the same as the distance between the two butting holes.
Preferably, the upper half part and the lower half part of the lower die prepressing insert are movably connected through a middle pneumatic telescopic rod.
Preferably, the lower die pressing plate is movably connected with the pressing piece through a hydraulic telescopic rod.
Preferably, the extension pressing plate is movably connected with the lower die pressing plate through a pneumatic telescopic rod.
Preferably, the using method of the forming pre-pressing structure comprises the following specific steps:
the method comprises the following steps: a lower die prepressing insert is fixedly installed in a groove in the n-shaped section of the material pressing plate at the top of the lower die, the lower die prepressing insert is connected into the butt joint hole when the pressing piece is installed, a middle cylinder is started, and the middle pneumatic telescopic rod is driven by the middle cylinder to stretch so as to adjust the height of the upper half part of the lower die prepressing insert, so that the upper half part of the lower die prepressing insert reaches the designated height;
step two: the two small cylinders are started, the small cylinders are used for driving the pneumatic telescopic rods to extend to adjust the length of the lower die pressing plate, the coverage surface of the lower die pressing plate is enlarged, the two small hydraulic cylinders are started, the two lower die pressing plates and the pressing frame extrude the pressing piece together under the condition that the small hydraulic cylinders drive the hydraulic telescopic rods to contract until the lower die pressing plate is pre-adjusted to be in a state of being tightly attached to the pressure plate in a shape like a Chinese character 'ji';
step three: when the forming is carried out, the upper die insert moves downwards to press the product blank, the pressing piece props against the lower die prepressing insert, and the product blank cannot be pressed in a suspension manner in the forming process.
The invention has the beneficial effects that: the two pressing parts at the bottom of the lower die prepressing insert are arranged in two obliquely symmetrical corners at the bottom of the pressing frame respectively, meanwhile, the two abutting holes are arranged in the two obliquely symmetrical corners in the groove respectively, the positions of the pressing parts correspond to the abutting holes, the distance between the two pressing parts is the same as the distance between the two abutting holes, so that the lower die prepressing insert can be added more stably after being installed in the groove, and the two pressing parts which are arranged diagonally are matched with the abutting holes in a matched manner, so that the whole lower die prepressing insert cannot be extruded and deviated after being installed, and the safety performance is effectively improved;
due to the existence of the middle cylinder and the middle pneumatic telescopic rod, the lower die prepressing insert can be driven to stretch by the middle cylinder to adjust the height of the upper half part of the lower die prepressing insert before use, on one hand, the height reduction caused by deformation and impact of stress after the lower die prepressing insert is used for multiple times in actual operation can be compensated, the condition that a product forming process is suspended due to the fact that the lower die prepressing insert is not pressed to a lower pressing plate and a groove simultaneously when the upper die insert presses a product is avoided, and the repair function is good, on the other hand, the height of the upper half part of the lower die prepressing insert can be adjusted, so that the lower die prepressing insert can be suitable for lower dies with different depths and the tops of the V-shaped structures, and;
because one end of each of the two lower die pressure plates is provided with the extension pressure plate, when the two small cylinders are started, the small cylinders can be used for driving the pneumatic telescopic rods to extend to adjust the length of the lower die pressure plates, so that the coverage surface of the lower die pressure plates is maximized, and the prepressing effect is effectively ensured;
because small-size pneumatic cylinder, hydraulic telescoping rod's existence, make two lower mould swage plates homoenergetic press the casting die with pressing the frame together under the condition of small-size pneumatic cylinder drive hydraulic telescoping rod shrink, thereby make the lower mould swage plate can be adjusted to the state of hugging closely swage plate several font sections in advance, effectively prevent because of the lower mould swage plate not hug closely the several font sections of subsides swage plate when initial and the lower mould swage constructs highly the decline in advance after once compressed, follow-up easy irregular off tracking of the product sideline that still can appear shaping and the condition that the profile corrugates.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the lower mold structure of the present invention;
FIG. 3 is a schematic structural view of the lower die of the invention after the lower die prepressing insert is taken down;
FIG. 4 is a schematic view of the upper mold structure of the present invention;
FIG. 5 is a front view of the upper die of the present invention;
FIG. 6 is a schematic structural view of a lower die pre-pressing mechanism according to the present invention;
FIG. 7 is a schematic view of a compression element according to the present invention;
in the figure: 1. an upper die; 2. an upper die insert; 3. a lower die; 4. a side frame; 5. a discharge pipe; 6. pressing plate straight line segments; 7. a pressure plate n-shaped section; 8. prepressing the material insert of the lower die; 9. a lower die material pressing plate; 10. connecting blocks; 11. a small cylinder; 12. a pneumatic telescopic rod; 13. an extension platen; 14. a small hydraulic cylinder; 15. a hydraulic telescopic rod; 16. pressing a frame; 17. pressing parts; 18. a middle pneumatic telescopic rod; 19. a piston rod; 20. a piston; 21. a built-in spring; 22. a nitrogen tank; 23. a groove; 24. a butt joint hole; 25. and a middle cylinder.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, a molding pre-pressing structure comprises an upper die 1 and a lower die 3, wherein an upper die insert 2 is arranged at the bottom of the upper die 1, side frames 4 are fixed on the outer walls of two sides of the lower die 3, a plurality of discharge pipes 5 which are uniformly distributed are connected to the bottom of the lower die 3, a pressing plate is arranged at the top of the lower die 3, the pressing plate is divided into two sections, namely a pressure plate n-shaped section 7 located in the middle of the top end of the lower die 3 and pressure plate straight-line sections 6 located on two sides of the pressure plate n-shaped section 7, a groove 23 is arranged in the middle of the pressure plate n-shaped section 7, two butt-joint holes 24 are arranged at the bottom of the groove 23;
the lower die prepressing mechanism comprises a lower die prepressing insert 8 and two pressing pieces 17, wherein the lower die prepressing insert 8 consists of an upper half part and a lower half part, the upper half part and the lower half part of the lower die prepressing insert 8 are connected through a plurality of middle pneumatic telescopic rods 18, the bottom end of each middle pneumatic telescopic rod 18 is connected with a middle cylinder 25, the middle cylinders 25 are positioned inside the lower half part of the lower die prepressing insert 8, the outer walls of the two sides of the lower half part of the lower die prepressing insert 8 are respectively connected with a lower die pressing plate 9, one end of each of the two lower die pressing plates 9 is connected with the lower half part of the lower die prepressing insert 8 through a connecting block 10, one small cylinder 11 is arranged at one end of each of the two lower die pressing plates 9 far away from each other, one pneumatic telescopic rod 12 is connected on the side wall of each of the two small cylinders 11 far, a pressing frame 16 is arranged at the bottom of the lower half part of the lower die pre-pressing insert 8, small hydraulic cylinders 14 are fixedly arranged on the outer walls of the two sides of the pressing frame 16, the tops of the two small hydraulic cylinders 14 are connected with hydraulic telescopic rods 15, the top ends of the two hydraulic telescopic rods 15 are respectively connected with a lower die pressing plate 9, two pressing pieces 17 are connected to the bottom of the pressing frame 16, and the two pressing pieces 17 are respectively connected into the butt-joint holes 24 at the corresponding positions;
the casting die 17 comprises a piston rod 19, a piston 20 and a nitrogen tank 22, the nitrogen tank 22 is arranged inside the casting die 17, nitrogen is filled into the nitrogen tank 22, the piston 20 with the diameter matched with the inner diameter of the nitrogen tank 22 is arranged at the top of the nitrogen tank 22, the piston rod 19 is connected to the top of the piston 20, the bottom of the piston 20 is connected with an internal spring 21 located inside the nitrogen tank 22, and the piston rod 19 is connected to the top of the piston 20.
Connecting block 10 is L type structure, and inside connecting block 10 inserts the clearance between the first half and the latter half of lower mould pre-compaction material insert 8.
The upper die insert 2 is matched with the material pressing plate.
Two butt joint holes 24 are respectively arranged at two obliquely symmetrical corners in the groove 23, two pressing pieces 17 are respectively arranged at two obliquely symmetrical corners at the bottom of the pressing frame 16, the positions of the pressing pieces 17 correspond to the butt joint holes 24, and the distance between the two pressing pieces 17 is the same as the distance between the two butt joint holes 24.
The upper half part and the lower half part of the lower die prepressing insert 8 are movably connected through a middle pneumatic telescopic rod 18.
The lower die pressing plate 9 is movably connected with the pressing piece 17 through a hydraulic telescopic rod 15.
The extension pressing plate 13 is movably connected with the lower die pressing plate 9 through a pneumatic telescopic rod 12.
The using method of the forming pre-pressing structure comprises the following specific steps:
the method comprises the following steps: a lower die prepressing insert 8 is fixedly installed in a groove 23 on the pressure plate n-shaped section 7 at the top of the lower die 3, the lower die prepressing insert 8 is connected into a butt hole 24 when the lower die prepressing insert 8 is installed, a middle cylinder 25 is started, and the middle pneumatic telescopic rod 18 is driven to stretch and retract through the middle cylinder 25 to adjust the height of the upper half part of the lower die prepressing insert 8, so that the upper half part of the lower die prepressing insert 8 reaches the designated height;
step two: next, starting the two small cylinders 11, driving the pneumatic telescopic rod 12 to extend by using the small cylinders 11 to adjust the length of the lower die pressing plate 9, expanding the coverage surface of the lower die pressing plate 9, starting the two small hydraulic cylinders 14, and extruding the pressing piece 17 by the two lower die pressing plates 9 together with the pressing frame 16 under the condition that the small hydraulic cylinders 14 drive the hydraulic telescopic rods 15 to contract until the lower die pressing plate 9 is pre-adjusted to be in a state of being tightly attached to the pressure plate zigzag section 7;
step three: when forming, the upper die insert 2 moves downwards to press the product blank, and the pressing piece 17 abuts against the lower die prepressing insert 8, so that the product blank cannot be pressed in a suspension manner in the forming process.
The invention has the beneficial effects that: because the two pressing parts 17 at the bottom of the lower die prepressing insert 8 are arranged, the two pressing parts 17 are respectively arranged at two obliquely symmetrical corners at the bottom of the pressing frame 16, meanwhile, the two butt-joint holes 24 are respectively arranged at the two obliquely symmetrical corners in the groove 23, the positions of the pressing parts 17 correspond to the butt-joint holes 24, the distance between the two pressing parts 17 is the same as the distance between the two butt-joint holes 24, the lower die prepressing insert 8 can be more stably added after being arranged in the groove 23, and the two pressing parts 17 which are diagonally arranged are matched with the butt-joint holes 24 which are matched with each other, so that the whole lower die prepressing insert 8 cannot be extruded and deviated after being arranged, and the safety performance is effectively improved;
due to the existence of the middle cylinder 25 and the middle pneumatic telescopic rod 18, the height of the upper half part of the lower die prepressing insert 8 can be adjusted by driving the middle pneumatic telescopic rod 18 to stretch by the middle cylinder 25 before use, so that on one hand, the height reduction caused by deformation due to stress impact after the lower die prepressing insert 8 is used for multiple times in actual operation can be compensated, the condition that a product forming process is suspended due to the fact that the lower die prepressing insert 2 is not pressed to the lower material pressing plate and the groove 23 when the product is pressed by the upper die insert 2 again can be avoided, the repair function is good, on the other hand, the height of the upper half part of the lower die prepressing insert 8 can be adjusted, the lower die prepressing insert is suitable for the lower dies 3 with the top of various different depths and in a structure in a;
because one end of each of the two lower die pressure plates 9 is provided with the extension pressure plate 13, when the two small cylinders 11 are started, the small cylinders 11 can be used for driving the pneumatic telescopic rods 12 to extend to adjust the length of the lower die pressure plates 9, so that the coverage surface of the lower die pressure plates 9 is maximized, and the prepressing effect is effectively ensured;
because of the existence of small-size pneumatic cylinder 14, hydraulic telescoping rod 15, make two lower mould swage plates 9 homoenergetic together extrude casting die 17 with pressure frame 16 under the condition that small-size pneumatic cylinder 14 drive hydraulic telescoping rod 15 shrink, thereby make lower mould swage plate 9 can be adjusted to the state of hugging closely swage plate a few font sections 7 in advance, effectively prevent because of lower mould swage plate 9 not hug closely during the initial time and paste swage plate a few font sections 7 and appear the lower mould swage mechanism height decline after once compressed, follow-up product sideline that still can appear shaping is easy random off tracking and the condition that the profile corrugates.
When the invention is used, firstly, a lower die pre-pressing mechanism is assembled, the upper half part and the lower half part of a lower die pre-pressing insert 8 are connected through a middle pneumatic telescopic rod 18, the outer walls of the two sides of the lower half part of the lower die pre-pressing insert 8 are respectively connected with a lower die pressing plate 9, one end of each of the two lower die pressing plates 9 is respectively connected with the lower half part of the lower die pre-pressing insert 8 through a connecting block 10, the end far away from the two lower die pressing plates 9 is respectively connected with an extension pressing plate 13 through a pneumatic telescopic rod 12, a pressing frame 16 is arranged at the bottom of the lower half part of the lower die pre-pressing insert 8, small hydraulic cylinders 14 on the outer walls of the two sides of the pressing frame 16 are connected with the lower die pressing plates 9 through hydraulic telescopic rods 15, the bottom of the pressing frame 16 is connected with two pressing pieces 17, then, the whole forming pre-pressing structure is assembled, and the, the bottom of an upper die 1 is fixedly connected with an upper die insert 2, a lower die prepressing insert 8 is fixedly arranged in a groove 23 on a pressure plate n-shaped section 7 at the top of a lower die 3, when the lower die prepressing insert 8 is arranged, a pressing piece 17 is connected into a butt joint hole 24, and then a small cylinder 11, a small hydraulic cylinder 14 and a middle cylinder 25 are all connected with an external power supply, because the pressing piece 17 at the bottom of the lower die prepressing insert 8 is provided with two pressing pieces 17 which are respectively arranged at two obliquely symmetrical corners at the bottom of a pressing frame 16, and simultaneously, the two butt joint holes 24 are respectively arranged at two obliquely symmetrical corners in the groove 23, the positions of the pressing pieces 17 correspond to the butt joint holes 24, the distance between the two pressing pieces 17 is the same as the distance between the two butt joint holes 24, so that the lower die prepressing insert 8 can be more stably added after being arranged in the, the two pressing pieces 17 arranged in a diagonal line are matched with the matched butt joint holes 24, so that the situation of extrusion deviation of the whole lower die prepressing insert 8 after installation is avoided; next, the middle cylinder 25 is started, and due to the existence of the middle cylinder 25 and the middle pneumatic telescopic rod 18, the height of the upper half part of the lower die prepressing insert 8 can be adjusted by driving the middle pneumatic telescopic rod 18 to stretch and retract through the middle cylinder 25 before use, so that on one hand, the height reduction caused by deformation due to stress impact after the lower die prepressing insert 8 is used for multiple times in actual operation can be compensated, the situation that the product forming process is suspended due to the fact that the lower pressing plate and the groove 23 are not pressed simultaneously when the upper die insert 2 presses the product is avoided, and a good repairing function is provided, on the other hand, the height of the upper half part of the lower die prepressing insert 8 can be adjusted, and therefore the lower die insert is suitable for the lower dies 3 with the top in the shape of Chinese character ji of various different depths, and has stronger; the two small cylinders 11 are started, the small cylinders 11 are used for driving the pneumatic telescopic rods 12 to extend to adjust the length of the lower die pressing plate 9, so that the coverage surface of the lower die pressing plate 9 is maximized, and the prepressing effect is effectively ensured; finally, the two small hydraulic cylinders 14 are started, and due to the existence of the small hydraulic cylinders 14 and the hydraulic telescopic rods 15, the two lower die pressing plates 9 can be both used for extruding the pressing piece 17 together with the pressing frame 16 under the condition that the small hydraulic cylinders 14 drive the hydraulic telescopic rods 15 to shrink, so that the lower die pressing plates 9 can be pre-adjusted to be in a state of being tightly attached to the pressure plate V-shaped section 7, the situation that the height of a lower die pressing mechanism is reduced after the lower die pressing plate 9 is initially not tightly attached to the pressure plate V-shaped section 7 and is pressed once, the subsequent side lines of a formed product are easy to deviate irregularly and the profile is wrinkled can be effectively prevented, the product can be put into use after the height is reduced, the upper die insert 2 moves downwards to press the product blank during forming, and the pressing piece 17 abuts against the lower die pressing insert 8, so that the product blank is not suspended in the forming process, thereby solving the problems of material running and wrinkling of the product caused by suspended material pressing in the product forming process.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. The forming pre-pressing structure comprises an upper die (1) and a lower die (3), and is characterized in that an upper die insert (2) is arranged at the bottom of the upper die (1), side frames (4) are fixed on the outer walls of two sides of the lower die (3), a plurality of discharging pipes (5) which are uniformly distributed are connected to the bottom of the lower die (3), a pressing plate is arranged at the top of the lower die (3) and is divided into two sections, namely a pressing plate n-shaped section (7) located in the middle of the top end of the lower die (3) and pressing plate straight-line sections (6) located on two sides of the pressing plate n-shaped section (7), a groove (23) is formed in the middle of the pressing plate n-shaped section (7), two butt-joint holes (24) are formed in the bottom of the groove (23), and a lower die pre-pressing mechanism is;
the lower die prepressing mechanism comprises a lower die prepressing insert (8) and two pressing pieces (17), the lower die prepressing insert (8) consists of an upper half part and a lower half part, the upper half part and the lower half part of the lower die prepressing insert (8) are connected through a plurality of middle pneumatic telescopic rods (18), the bottom end of each middle pneumatic telescopic rod (18) is connected with a middle cylinder (25), the middle cylinder (25) is positioned inside the lower half part of the lower die prepressing insert (8), the outer walls of the two sides of the lower half part of the lower die prepressing insert (8) are respectively connected with a lower die pressing plate (9), one end of each lower die pressing plate (9) is connected with the lower half part of the lower die prepressing insert (8) through a connecting block (10), and one small-sized cylinder (11) is respectively installed at one end, far away from each lower die pressing plate (9), the side walls, far away from the two small cylinders (11), of the two small cylinders are connected with a pneumatic telescopic rod (12), one end, far away from the two pneumatic telescopic rods (12), of each pneumatic telescopic rod is connected with an extension pressing plate (13), the bottom of the lower half portion of the lower die pre-pressing insert (8) is provided with a pressing frame (16), the outer walls of the two sides of the pressing frame (16) are fixedly provided with a small hydraulic cylinder (14), the tops of the two small hydraulic cylinders (14) are connected with a hydraulic telescopic rod (15), the top ends of the two hydraulic telescopic rods (15) are respectively connected with a lower die pressing plate (9), the bottom of the pressing frame (16) is connected with two pressing pieces (17), and the two pressing pieces (17) are respectively connected into butt-joint holes (24) in;
casting die (17) includes piston rod (19), piston (20) and nitrogen gas groove (22), casting die (17) inside is provided with nitrogen gas groove (22), nitrogen gas groove (22) inside is gone into nitrogen gas, just nitrogen gas groove (22) top is provided with piston (20) of a diameter size and its internal diameter size looks adaptation, piston (20) top is connected with a piston rod (19), just piston (20) bottom is connected with one and is located built-in spring (21) of nitrogen gas groove (22) inside, piston (20) top connecting piston rod (19).
2. The pre-pressing structure for molding according to claim 1, wherein the connecting block (10) is of an L-shaped structure, and the connecting block (10) is inserted into a gap between the upper half portion and the lower half portion of the lower die pre-pressing insert (8).
3. A forming pre-press structure according to claim 1, characterized in that the upper die insert (2) is adapted to the press plate.
4. A pre-press molding structure according to claim 1, wherein two of the abutting holes (24) are respectively formed at two diagonally symmetrical corners inside the groove (23), two pressing members (17) are respectively formed at two diagonally symmetrical corners at the bottom of the pressing frame (16), the pressing members (17) are located corresponding to the abutting holes (24), and the distance between the two pressing members (17) is the same as the distance between the two abutting holes (24).
5. The pre-compaction structure for molding according to claim 1, wherein the upper half part and the lower half part of the lower mold pre-compaction insert (8) are movably connected through a middle pneumatic telescopic rod (18).
6. A pre-press forming structure according to claim 1, wherein the lower die pressing plate (9) is movably connected with the pressing member (17) through a hydraulic telescopic rod (15).
7. A pre-press forming structure according to claim 1, wherein the extension pressing plate (13) is movably connected with the lower die pressing plate (9) through a pneumatic telescopic rod (12).
8. The forming pre-pressing structure as claimed in claim 1, wherein the using method of the forming pre-pressing structure comprises the following specific steps:
the method comprises the following steps: a lower die prepressing insert (8) is fixedly installed in a groove (23) in a pressure plate n-shaped section (7) at the top of a lower die (3), when the lower die prepressing insert (8) is installed, a pressing piece (17) is connected into a butt joint hole (24), a middle cylinder (25) is started, and the middle cylinder (25) drives a middle pneumatic telescopic rod (18) to stretch and retract so as to adjust the height of the upper half part of the lower die prepressing insert (8), so that the upper half part of the lower die prepressing insert (8) reaches a specified height;
step two: the two small cylinders (11) are started, the small cylinders (11) are used for driving the pneumatic telescopic rods (12) to extend to adjust the length of the lower die pressing plate (9), the coverage surface of the lower die pressing plate (9) is enlarged, the two small hydraulic cylinders (14) are started, and the two lower die pressing plates (9) and the pressing frame (16) extrude the pressing piece (17) together under the condition that the small hydraulic cylinders (14) drive the hydraulic telescopic rods (15) to contract until the lower die pressing plate (9) is adjusted to be in a state of being tightly attached to the pressure plate in advance, wherein the shape of the pressure plate is a Chinese character ji (7);
step three: when the forming is carried out, the upper die insert (2) moves downwards to press the product blank, meanwhile, the pressing piece (17) props against the lower die prepressing insert (8), and the product blank cannot be suspended and pressed in the forming process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN201279554Y (en) * | 2008-10-20 | 2009-07-29 | 济南铸锻所捷迈机械有限公司 | Pressing device of punch machine |
| US8047043B2 (en) * | 2008-03-11 | 2011-11-01 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Punch die and punch machine using the same |
| CN202174161U (en) * | 2011-06-20 | 2012-03-28 | 苏州金鸿顺汽车部件股份有限公司 | Pre-pressing device of pipe end shaping die |
| CN205236769U (en) * | 2015-11-13 | 2016-05-18 | 台州市黄岩君田冲模有限公司 | Stamping die presses material shaping and prevents mechanism of wrinkling |
| CN206305300U (en) * | 2016-11-07 | 2017-07-07 | 昆山新鸿企业机械制造有限公司 | A kind of mould with precompressed material removing mechanism |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8047043B2 (en) * | 2008-03-11 | 2011-11-01 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Punch die and punch machine using the same |
| CN201279554Y (en) * | 2008-10-20 | 2009-07-29 | 济南铸锻所捷迈机械有限公司 | Pressing device of punch machine |
| CN202174161U (en) * | 2011-06-20 | 2012-03-28 | 苏州金鸿顺汽车部件股份有限公司 | Pre-pressing device of pipe end shaping die |
| CN205236769U (en) * | 2015-11-13 | 2016-05-18 | 台州市黄岩君田冲模有限公司 | Stamping die presses material shaping and prevents mechanism of wrinkling |
| CN206305300U (en) * | 2016-11-07 | 2017-07-07 | 昆山新鸿企业机械制造有限公司 | A kind of mould with precompressed material removing mechanism |
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