CN112719078B - Sheet material roll punching forming die with positioning function and roll punching forming method - Google Patents
Sheet material roll punching forming die with positioning function and roll punching forming method Download PDFInfo
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- CN112719078B CN112719078B CN202011485665.8A CN202011485665A CN112719078B CN 112719078 B CN112719078 B CN 112719078B CN 202011485665 A CN202011485665 A CN 202011485665A CN 112719078 B CN112719078 B CN 112719078B
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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
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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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
Abstract
The invention discloses a sheet material roll punching forming die and a roll punching forming method, wherein a positioning device is arranged in a first die corresponding to a sheet material positioning hole, in the sheet material roll punching forming process, the first die and a second die are gradually closed, a positioning pin is gradually contracted into a positioning mounting hole after contacting with a boss, a swing rod moves along a guide rail groove, after the first die and the second die are completely closed, the swing rod moves to an inner sunken point of the guide rail groove through a contraction branch and generates the action force of balancing the elastic force of an elastic resetting mechanism, the positioning pin is internally fixed in the positioning mounting hole, the interference between the positioning pin and a flowing material can be avoided, after a formed sheet material is taken out, the first die and the second die are closed again, the positioning pin can be driven to continuously move to the bottom of the positioning mounting hole by the thickness of the sheet material, so that the swing rod enters the resetting branch from the inner sunken point, the positioning pin is reset under the action of the elastic reset mechanism, and the positioning pin extends out of the positioning mounting hole again.
Description
Technical Field
The invention belongs to the technical field of plate forming, and particularly relates to a plate roll punching forming die with positioning function and a roll punching forming method.
Background
Roll bending, stamping and roll punching are common plate forming methods. In the stamping process, in order to ensure that the plate does not move in the forming process, a mode of a plurality of positioning pins is adopted. For example, chinese patent application publication No. CN111230994A discloses a plate stamping die capable of automatic positioning, and the scheme proposed in the patent application is to use a motor to drive four baffles to move, so as to determine the position of a plate. Chinese patent publication No. CN210435185U discloses a positioning structure for an automobile part stamping die, which optimizes a conventional positioning pin, increases balls and guide grooves, and reduces heat generated by abrasion of the positioning pin and the guide post during continuous operation; however, in the process of forming the plate material, the material at the complex profile is subjected to plastic deformation, and the deformed material collides with the positioning pin in the form of the fixed positioning pin, so that the positioning accuracy of the positioning pin is affected. Chinese patent application publication No. CN110496901A discloses a positioning and stamping die for automobile parts, in which a positioning cavity of the die and a positioning pin outside the die are utilized to realize three-stage positioning, the positioning mode has high requirements on the processing accuracy of the die, and the over-positioning condition is likely to occur, and the invention has certain constraints on the design of the processed parts, and the flexibility is poor.
The roll punching process is a composite forming process, essentially combines a punching process with a roll bending process, and can process complicated variable cross-section beam parts. The mould block carries out rotary motion in the roll punching shaping, and traditional roll punching shaping positioner can't satisfy the technological requirement. If the roll punching forming is lack of effective positioning, the formed parts have defects of deviation, torsion and the like. There is no description of how to position the parts in the roll-to-roll forming process.
Disclosure of Invention
In the sheet forming process, the locating pins have already performed a locating function after the material is plastically deformed, and in order to prevent the locating pins from interfering with the flowing material, it is best to withdraw the locating pins into the die.
In view of the above, an object of the present invention is to provide a sheet material roll-forming die with positioning and a roll-forming method, which can prevent interference between a positioning pin and a flowing material during roll-forming of a sheet material.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention firstly provides a plate roll-punching forming die with positioning, which comprises a first die set and a second die set which are oppositely arranged; the first die set comprises at least two first dies, and the second die set comprises at least two second dies; the side surface of the second die facing the first die is provided with an inward concave forming groove, and the head end of the first die facing the second die is matched with the forming groove and used for driving a plate to be formed;
positioning mounting holes are formed in at least two of the first dies, and positioning devices matched with the positioning holes of the plates are arranged in the positioning mounting holes;
the positioning device comprises a positioning pin assembly and a guide sleeve arranged in the corresponding positioning mounting hole, the positioning pin assembly comprises a positioning pin and an inner core, a guide channel is arranged in the guide sleeve, the inner core is in sliding fit with the guide channel, and the positioning pin and the inner core synchronously move along the guide channel;
a guide rail groove is formed in the side face of the inner core, a swing rod in running fit with the guide sleeve is arranged on the guide sleeve, and the tail end of the swing rod is located in the guide rail groove and swings under the guiding action of the guide rail groove;
a contraction branch and a reset branch are arranged at one end, far away from the guide sleeve, of the guide rail groove, and an invagination point protruding towards one side where the guide sleeve is located and used for limiting the swing rod is formed at the connecting position of the contraction branch and the reset branch;
an elastic reset mechanism used for applying elastic force towards the side direction of the positioning pin to the inner core is arranged in the guide sleeve;
bosses are arranged at the bottoms of the forming grooves and the positioning pins in a one-to-one correspondence manner.
Further, a ball is arranged between the guide channel and the inner core; the side wall of the inner core is provided with a semicircular groove, the ball is positioned in the semicircular groove and partially exposed out of the side wall of the inner core, and two ends of the semicircular groove are respectively provided with a limiting screw for limiting the ball.
Furthermore, an embedded groove is formed in the end face, facing the inner core, of the positioning pin, the end portion of the inner core extends into the embedded groove, and a set screw is arranged between the embedded groove and the inner core to be connected; or the positioning pin and the inner core are integrated;
and connecting screws are respectively arranged between two sides of the guide sleeve and two corresponding side walls of the positioning mounting hole and are in hinged connection, and the two connecting screws are coaxial and have axes parallel to the set screw.
Furthermore, the guide channel is back to the one end of inner core is equipped with connecting stud, the hole bottom of location mounting hole be equipped with connecting stud complex screw, connecting stud installs on the screw, elasticity canceling release mechanical system is including the suit in connecting stud's pressure spring.
Furthermore, a cylindrical groove is formed in the end face, facing the connecting stud, of the inner core, one end of the pressure spring abuts against the hole bottom of the positioning installation hole, and the other end of the pressure spring is located in the cylindrical groove and abuts against the groove bottom of the cylindrical groove.
Furthermore, a rotating shaft is arranged on the guide sleeve, and the head end of the oscillating bar is sleeved on the rotating shaft in a rotating fit manner; a first bearing is arranged between the head end of the oscillating bar and the rotating shaft; and a second bearing is arranged at the tail end of the oscillating bar.
Furthermore, the side wall of the contraction branch opposite to the farthest point away from the guide sleeve is provided with a contraction guide inclined plane for guiding the swing rod to reach the sunken point, and the side wall of the reset branch opposite to the sunken point is provided with a reset guide inclined plane for guiding the swing rod to enter.
The invention also provides a plate roll-punching forming method with positioning, which comprises the following steps:
1) feeding: placing a plate to be subjected to roll punching forming between the first die set and the second die set, and respectively aligning the positioning pins with the positioning holes in the plate;
2) forming: driving the first die set and the second die set to rotate in the positive direction, gradually closing the dies, moving the plate under the driving of the positioning pin, and gradually embedding the head end of the first die into the corresponding forming groove to deform the plate;
after the positioning pin is contacted with the corresponding boss, along with the increase of the depth of the head end of the first die embedded into the corresponding forming groove, the inner core moves towards the hole bottom of the positioning mounting hole along the guide channel, the tail end of the swing rod moves towards an inward sunken point relative to the guide rail groove, and the positioning pin gradually contracts towards the inside of the positioning mounting hole;
3) retracting: when the first die and the second die are completely assembled, the head end of the first die is completely embedded into the corresponding forming groove, the swing rod reaches the inner sunken point through the contraction branch and generates acting force for balancing the resetting elasticity applied by the elastic resetting mechanism to the inner core, and the positioning pin is completely contracted in the corresponding positioning mounting hole;
4) demolding: the first die set and the second die set are continuously driven to rotate in the positive direction, the first die and the second die are gradually separated, and the positioning pins shrink in the corresponding positioning mounting holes and cannot interfere with the positioning holes of the plate;
5) taking a workpiece: when the first die and the second die are completely separated, taking out the formed plate;
6) resetting: the first die set and the second die set are driven to rotate and reversely rotate, when the first die and the second die are completely closed, the head end of the first die is completely embedded into the corresponding forming groove, the positioning pin is in contact fit with the corresponding boss again and drives the inner core to move towards the hole bottom of the positioning mounting hole by a distance equal to the thickness of the plate, the swing rod is separated from the inner sink point and enters the reset branch, and the positioning pin and the inner core extend out of the positioning mounting hole to reset under the action of the elastic reset mechanism.
Further, the method also comprises the step 7): and (5) circulating the steps 1) to 6), and continuing roll punching to form the plate.
Further, before the feeding in step 1), the position relationship of the first mold in the first mold group and the position relationship of the second mold in the second mold group are respectively adjusted, so that the first mold provided with the positioning device is respectively arranged corresponding to the positioning hole of the plate, and the second mold provided with the boss is respectively arranged corresponding to the first mold provided with the positioning device.
The invention has the beneficial effects that:
the invention relates to a sheet material roll punching forming die with positioning, wherein a positioning device is arranged in a first die and corresponds to a sheet material positioning hole, in the sheet material roll punching forming process, the first die and a second die are gradually closed, a positioning pin is gradually contracted into the positioning mounting hole after contacting with a boss, a swing rod moves along a guide rail groove, after the first die and the second die are completely closed, the swing rod moves to an inner sunken point of the guide rail groove through a contraction branch and generates an action force for balancing the elastic force of an elastic resetting mechanism, the positioning pin is fixed in the positioning mounting hole, so that the interference between the positioning pin and a flowing material can be avoided, after a formed sheet material is taken out, the first die and the second die are closed again, the positioning pin can be driven to continuously move the distance of the thickness of the sheet material to the bottom of the positioning mounting hole, the swing rod enters the resetting branch from the inner sunken point and is reset under the action of the elastic resetting mechanism, and the positioning pin extends out of the positioning mounting hole again.
The plate roll punching forming die with positioning function further has the following advantages:
1) the positioning device adopts a pure mechanical structure to realize the extension of the positioning pin, so that the positioning device can not generate secondary stretching damage to the formed plate, the quality of the formed part is improved, and the problem that the complex surface of the stamping forming process is difficult to position is solved;
2) the positioning device is arranged in the corresponding first die, so that the position of the first die provided with the positioning device can be adjusted according to the positioning holes of different plates, and accurate positioning is realized;
3) the plate roll-punching forming die is simple in structure, convenient to use and high in flexibility.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
FIG. 1 is a schematic structural view of an embodiment of a plate roll-stamping forming die with positioning according to the present invention;
FIG. 2 is a schematic structural view of a first mold set;
FIG. 3 is a schematic structural view of a second mold set;
FIG. 4 is a schematic view of the structural position relationship between a first mold and a second mold with a positioning device before mold closing;
FIG. 5 is a schematic view showing a structural position relationship among a first mold provided with a positioning device before mold closing, a plate material before forming, and a second mold;
FIG. 6 is an enlarged partial view of the cross-sectional view A-A of FIG. 5;
FIG. 7 is a schematic view showing the structural position relationship among the first mold provided with the positioning device after the complete mold closing, the formed plate and the second mold;
FIG. 8 is a schematic diagram showing a structural position relationship among the first mold provided with the positioning device, the formed plate, and the second mold during demolding;
FIG. 9 is a schematic view of the structural position relationship between the first mold and the second mold with the positioning device when the mold is closed again after the sheet material is taken out;
FIG. 10 is a schematic view of the positioning device, particularly the positioning pin, shown fully extended;
FIG. 11 is a schematic view of the positioning device; in particular to a state diagram when the positioning pin is completely contracted.
Description of reference numerals:
1-a first mold; 1 a-positioning mounting hole; 2-a second mold; 2 a-forming a groove; 3-a plate material; 4-a connection screw; 5-a connection screw; 6-boss; 7-a positioning device;
11-a locating pin; 11 a-embedded groove; 12-inner core; 12 a-a cylindrical trough; 13-a guide sleeve; 13 a-a guide channel; 14-a swing rod; 15-guide rail grooves; 15 a-converging branch; 15 b-a reset branch; 15 c-an invagination point; 15 d-retracting the guide ramp; 15 e-a reset guide ramp; 16-a ball bearing; 17-a limit screw; 18-set screws; 19-connecting studs; 20-a pressure spring; 21-a rotating shaft; 21 a-washer 21 a; 22-a first bearing; 23-second bearing.
Detailed Description
The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Fig. 1 is a schematic structural view of an embodiment of the plate roll-punching forming die with positioning according to the present invention. The plate roll-punching forming die with positioning function in the embodiment comprises a first die set and a second die set which are oppositely arranged; the first die set comprises at least two first dies 1, and the second die set comprises at least two second dies 2; the side surface of the second die 2 facing the first die 1 is provided with an inward concave forming groove 2a, and the head end of the first die 1 facing the second die 2 is matched with the forming groove 2a and used for driving the plate 3 to form. In all the first molds 1, at least two first molds 1 are provided with positioning mounting holes 1a, and positioning devices 7 matched with the positioning holes of the plates 3 are arranged in the positioning mounting holes 1 a.
As shown in fig. 10, the positioning device 7 of the present embodiment includes a positioning pin assembly and a guide sleeve 13 installed in the corresponding positioning installation hole 1a, the positioning pin assembly includes a positioning pin 11 and an inner core 12, a guide channel 13a is provided in the guide sleeve 13, the inner core 12 is slidably fitted with the guide channel 13a, and the positioning pin 11 and the inner core 12 move along the guide channel 13a synchronously. Specifically, the end face of the positioning pin 11 facing the inner core 12 of the present embodiment is provided with an insertion groove 11a, the end of the inner core 12 extends into the insertion groove 11a, and a set screw 18 is arranged between the insertion groove 11a and the inner core 12. Of course, in some embodiments, the positioning pin 11 and the inner core 12 may be integrated with each other, and will not be described in detail. In this embodiment, two connecting screws 4 and 5 are respectively disposed between two sides of the guiding sleeve 13 and two side walls of the corresponding positioning and mounting hole 1a, and are connected in a hinged manner, the two connecting screws 4 and 5 are coaxial, and the axes thereof are parallel to the fastening screw 18.
The side surface of the inner core 12 of this embodiment is provided with a guide rail groove 15, the guide sleeve 13 is provided with a swing rod 14 which is rotatably matched with the guide rail groove, and the tail end of the swing rod 14 is positioned in the guide rail groove 15 and swings under the guiding action of the guide rail groove 15. Specifically, the guide sleeve 13 of the present embodiment is provided with a rotating shaft 21, and the head end of the swing link 14 is rotatably fitted and sleeved on the rotating shaft 21; a first bearing 22 is arranged between the head end of the swing rod 14 and the rotating shaft 21; the tail end of the swing link 14 is provided with a second bearing 23. The rotating shaft 21 of the present embodiment is formed by a screw in threaded fit with the guide sleeve 13, and a washer 21a is arranged between a screw head of the screw and the head end of the swing rod 14.
In this embodiment, a contracting branch 15a and a returning branch 15b are disposed at one end of the guide rail groove 15 away from the guide sleeve 13, and an inward concave point 15c protruding toward one side of the guide sleeve 13 and used for limiting the swing link 14 is formed at a connecting position of the contracting branch 15a and the returning branch 15 b. Specifically, the side wall of the contracting branch 15a opposite to the farthest point from the guide sleeve 13 is provided with a contracting guide inclined surface 15d for guiding the swing link 14 to reach the inward-depressed point 15c, and the side wall of the resetting branch 15b opposite to the inward-depressed point 15c is provided with a resetting guide inclined surface 15e for guiding the swing link 14 to enter, so that the swing link 14 can smoothly reach the inward-depressed point 15c and be separated from the inward-depressed point 15 c. An elastic reset mechanism for applying an elastic force to the inner core 12 in the direction of the side of the positioning pin 11 is arranged in the guide sleeve 13.
Further, a ball 16 is arranged between the guide channel 13a and the inner core 12; the side wall of the inner core 12 is provided with a semicircular groove, the ball 16 is positioned in the semicircular groove and partially exposed out of the side wall of the inner core 12, and two ends of the semicircular groove are respectively provided with a limit screw 17 for limiting the ball 16. By providing the balls 16, the sliding resistance between the inner core 12 and the guide passage 13a can be reduced, and the service life can be improved.
Furthermore, one end of the guide channel 13a, which faces away from the inner core 12, is provided with a connecting stud 19, the bottom of the positioning and mounting hole 1a is provided with a screw hole matched with the connecting stud 19, and the connecting stud 19 is mounted on the screw hole. The elastic return mechanism of the present embodiment includes a compression spring 20 fitted around the connection stud 19. Specifically, in the present embodiment, the end surface of the inner core 12 facing the connecting stud 19 is provided with a cylindrical groove 12a, one end of the pressure spring 20 abuts against the hole bottom of the positioning and mounting hole 1a, and the other end is located in the cylindrical groove 12a and abuts against the bottom of the cylindrical groove 12 a. By arranging the compression spring 20, an elastic force action towards the direction of the positioning pin 11 can be exerted on the inner core 12, so that the positioning pin 11 can be driven to extend and reset after the positioning pin 11 contracts.
The following describes in detail a specific embodiment of the method for roll forming a sheet material with positioning with reference to the die for roll forming a sheet material with positioning according to this embodiment.
In the plate roll-punching forming method with positioning in this embodiment, first, the position relationship of the first mold 1 in the first mold set and the position relationship of the second mold 2 in the second mold set are respectively adjusted, so that the first mold 1 provided with the positioning device is respectively arranged corresponding to the positioning holes of the plate 3, and the second mold provided with the boss 6 is respectively arranged corresponding to the first mold 1 provided with the positioning device, and the method includes the following steps:
1) feeding: placing the plate 3 to be roll-stamped between the first die set and the second die set, and aligning the positioning pins 11 with the positioning holes on the plate 3 respectively, as shown in fig. 5;
2) forming: the first die set and the second die set are driven to rotate in the positive direction, the first die 1 and the second die 2 are gradually closed, the plate 3 is driven by the positioning pin 11 to move, and the head end of the first die 1 is gradually embedded into the corresponding forming groove 2a to deform the plate 3;
after the positioning pin 11 contacts with the corresponding boss 6, along with the increase of the depth of the head end of the first die 1 embedded into the corresponding forming groove 2a, the inner core 12 moves towards the hole bottom of the positioning mounting hole 1a along the guide channel 13a, the tail end of the swing rod 14 moves towards the inward depression point 15c relative to the guide rail groove 15, and the positioning pin 11 gradually shrinks towards the inside of the positioning mounting hole 1 a;
3) retracting: when the first die 1 and the second die 2 are completely closed, the head end of the first die 1 is completely embedded into the corresponding forming groove 2a, the swing rod 14 reaches the inward-recessed point 15c through the contraction branch 15a and generates an acting force for balancing the reset elastic force applied by the elastic reset mechanism to the inner core 12, and at the moment, the positioning pin 11 is completely contracted in the corresponding positioning mounting hole 1a, as shown in fig. 7;
4) demolding: continuing to drive the first die set and the second die set to rotate in the forward direction, gradually separating the first die 1 from the second die 2, and enabling the positioning pins 11 to shrink in the corresponding positioning mounting holes 1a without interfering with the positioning holes of the plate 3, as shown in fig. 8;
5) taking a workpiece: when the first die 1 and the second die 2 are completely separated, taking out the formed plate 3;
6) resetting: the first die set and the second die set are driven to rotate reversely, when the first die 1 and the second die 2 are completely assembled, the head end of the first die 1 is completely embedded into the corresponding forming groove 2a, the positioning pin 11 is in contact fit with the corresponding boss 6 again and drives the inner core 12 to move towards the hole bottom of the positioning mounting hole 1a by a distance equal to the thickness of the plate 3, so that the swing rod 14 is separated from the inner sunken point 15c and enters the reset branch 15b, and the positioning pin 11 and the inner core 12 extend out of the positioning mounting hole 1a to reset under the action of the elastic reset mechanism, as shown in fig. 9.
7) And (3) circulation: and (6) circulating the steps 1 to 6, and continuously rolling and punching to form the sheet material 3.
In the plate roll-punching forming die with positioning function and the plate forming method, the positioning device is arranged in the first die corresponding to the plate positioning hole, the first die and the second die are gradually matched in the plate roll-punching forming process, the positioning pin is gradually contracted into the positioning mounting hole after contacting with the boss, the oscillating bar moves along the guide rail groove, when the first die and the second die are completely matched, the oscillating bar moves to an inner sunken point of the guide rail groove through the contraction branch and generates the action force for balancing the elastic force of the elastic resetting mechanism, the positioning pin is fixed in the positioning mounting hole, the interference between the positioning pin and the flowing material can be avoided, after the formed plate is taken out, the first die and the second die are matched again, the positioning pin can be driven to continuously move the plate to the hole bottom of the positioning mounting hole by the thickness distance of the plate, so that the oscillating bar enters the resetting branch from the inner sunken point, the positioning pin is reset under the action of the elastic reset mechanism, and the positioning pin extends out of the positioning mounting hole again.
The plate roll-punching forming die with the positioning function also has the following advantages:
1) the positioning device adopts a pure mechanical structure to realize the extension of the positioning pin, so that the positioning device can not generate secondary stretching damage to the formed plate, the quality of the formed part is improved, and the problem that the complex surface of the stamping forming process is difficult to position is solved;
2) the positioning device is arranged in the corresponding first die, so that the position of the first die provided with the positioning device can be adjusted according to the positioning holes of different plates, and accurate positioning is realized;
3) the plate roll-punching forming die is simple in structure, convenient to use and high in flexibility.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (9)
1. A plate roll punching forming die with positioning function comprises a first die set and a second die set which are arranged oppositely; the first die set comprises at least two first dies (1), and the second die set comprises at least two second dies (2); the side surface, facing the first mould (1), of the second mould (2) is provided with an inward concave forming groove (2a), the head end, facing the second mould (2), of the first mould (1) is matched with the forming groove (2a) and is used for driving a plate (3) to form, and the plate forming machine is characterized in that:
in all the first molds (1), at least two first molds (1) are internally provided with positioning mounting holes (1a), and positioning devices matched with positioning holes of the plate (3) are arranged in the positioning mounting holes (1 a);
the positioning device comprises a positioning pin assembly and a guide sleeve (13) installed in the corresponding positioning installation hole (1a), the positioning pin assembly comprises a positioning pin (11) and an inner core (12), a guide channel (13a) is formed in the guide sleeve (13), the inner core (12) is in sliding fit with the guide channel (13a), and the positioning pin (11) and the inner core (12) synchronously move along the guide channel (13 a);
a guide rail groove (15) is formed in the side face of the inner core (12), a swing rod (14) which is in running fit with the guide sleeve (13) is arranged on the guide sleeve, and the tail end of the swing rod (14) is located in the guide rail groove (15) and swings under the guide effect of the guide rail groove (15);
one end, far away from the guide sleeve (13), of the guide rail groove (15) is provided with a contraction branch (15a) and a reset branch (15b), and an inward-sinking point (15c) protruding towards one side where the guide sleeve (13) is located and used for limiting the swing rod (14) is formed at the connecting position of the contraction branch (15a) and the reset branch (15 b); a contraction guide inclined plane (15d) for guiding the swing rod (14) to reach the inner sunken point (15c) is arranged on the side wall of the contraction branch (15a) opposite to the farthest point away from the guide sleeve (13), and a reset guide inclined plane (15e) for guiding the swing rod (14) to enter is arranged on the side wall of the reset branch (15b) opposite to the inner sunken point (15 c);
an elastic resetting mechanism used for applying elastic force towards the side direction of the positioning pin (11) to the inner core (12) is arranged in the guide sleeve (13);
bosses (6) are arranged on the bottoms of the forming grooves (2a) and the positioning pins (11) in a one-to-one correspondence manner.
2. The sheet material roll-stamping forming die with positioning function as claimed in claim 1, wherein: a ball (16) is arranged between the guide channel (13a) and the inner core (12); the side wall of the inner core (12) is provided with a semicircular groove, the ball (16) is positioned in the semicircular groove and partially exposed out of the side wall of the inner core (12), and two ends of the semicircular groove are respectively provided with a limiting screw (17) used for limiting the ball (16).
3. The sheet material roll-stamping forming die with positioning function as claimed in claim 1, wherein: an embedded groove (11a) is formed in the end face, facing the inner core (12), of the positioning pin (11), the end portion of the inner core (12) extends into the embedded groove (11a), and a set screw (18) is arranged between the embedded groove (11a) and the inner core (12) to be connected; or the positioning pin (11) and the inner core (12) are integrated;
and connecting screws (4,5) are respectively arranged between two sides of the guide sleeve (13) and two corresponding side walls of the positioning mounting hole (1a) in a hinged connection mode, the two connecting screws (4,5) are coaxial, and the axes of the two connecting screws are parallel to the set screw (18).
4. The sheet material roll stamping forming die with positioning function as claimed in claim 1, wherein: the guiding channel (13a) is back to the one end of inner core (12) is equipped with connecting stud (19), the hole bottom of location mounting hole (1a) be equipped with connecting stud (19) complex screw, connecting stud (19) are installed on the screw, elasticity canceling release mechanical system is including the suit in pressure spring (20) of connecting stud (19).
5. The sheet material roll-stamping forming die with positioning function as claimed in claim 4, wherein: and a cylindrical groove (12a) is formed in the end face, facing the connecting stud (19), of the inner core (12), one end of the pressure spring (20) abuts against the hole bottom of the positioning installation hole (1a), and the other end of the pressure spring is located in the cylindrical groove (12a) and abuts against the groove bottom of the cylindrical groove (12 a).
6. The sheet material roll-stamping forming die with positioning function as claimed in claim 1, wherein: a rotating shaft (21) is arranged on the guide sleeve (13), and the head end of the swing rod (14) is sleeved on the rotating shaft (21) in a rotating fit manner; a first bearing (22) is arranged between the head end of the swing rod (14) and the rotating shaft (21); and a second bearing (23) is arranged at the tail end of the swing rod (14).
7. A method for roll punching and forming of a plate with positioning is characterized in that: the method comprises the following steps:
1) feeding: placing a plate (3) to be subjected to roll punching forming between the first die set and the second die set, and respectively aligning the positioning pins (11) with the positioning holes in the plate (3);
2) forming: the first die set and the second die set are driven to rotate in the positive direction, the first die (1) and the second die (2) are gradually closed, the plate (3) moves under the driving of the positioning pin (11), and the head end of the first die (1) is gradually embedded into the corresponding forming groove (2a) to deform the plate (3);
after the positioning pin (11) is contacted with the corresponding boss (6), along with the increase of the depth of the head end of the first die (1) embedded into the corresponding forming groove (2a), the inner core (12) moves towards the hole bottom of the positioning mounting hole (1a) along the guide channel (13a), the tail end of the swing rod (14) moves towards the inward sunk point (15c) relative to the guide rail groove (15), and the positioning pin (11) gradually shrinks towards the inside of the positioning mounting hole (1 a);
3) retracting: when the first die (1) and the second die (2) are completely closed, the head end of the first die (1) is completely embedded into the corresponding forming groove (2a), the swing rod (14) reaches an inner sunken point (15c) through a contraction branch (15a) and generates an acting force for balancing the resetting elasticity applied by the elastic resetting mechanism to the inner core (12), and the positioning pin (11) is completely contracted in the corresponding positioning mounting hole (1 a);
4) demolding: the first die set and the second die set are continuously driven to rotate in the positive direction, the first die (1) and the second die (2) are gradually separated, and the positioning pin (11) is contracted in the corresponding positioning mounting hole (1a) and cannot interfere with the positioning hole of the plate (3);
5) taking a workpiece: when the first die (1) and the second die (2) are completely separated, taking out the formed plate (3);
6) resetting: the first die set and the second die set are driven to rotate reversely, when the first die (1) and the second die (2) are completely assembled, the head end of the first die (1) is completely embedded into the corresponding forming groove (2a), the positioning pin (11) is in contact fit with the corresponding boss (6) again and drives the inner core (12) to move towards the bottom of the positioning mounting hole (1a) by a distance equal to the thickness of the plate (3), so that the swing rod (14) is separated from the inner sunken point (15c) and enters the reset branch (15b), and the positioning pin (11) and the inner core (12) extend out of the positioning mounting hole (1a) to reset under the action of the elastic reset mechanism.
8. The sheet material roll-forming method with positioning as recited in claim 7, wherein: further comprising step 7): and (5) circulating the step 1) to the step 6), and continuously performing roll punching to form the plate (3).
9. The sheet material roll forming method with positioning as recited in claim 7, wherein: before the step 1) of feeding, respectively adjusting the position relation of a first die (1) in a first die set and the position relation of a second die (2) in a second die set, so that the first die (1) provided with a positioning device is respectively arranged corresponding to the positioning holes of the plate (3), and the second die provided with a boss (6) is respectively arranged corresponding to the first die (1) provided with the positioning device.
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