CN109772996B - Stamping part - Google Patents
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- CN109772996B CN109772996B CN201910249246.5A CN201910249246A CN109772996B CN 109772996 B CN109772996 B CN 109772996B CN 201910249246 A CN201910249246 A CN 201910249246A CN 109772996 B CN109772996 B CN 109772996B
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Abstract
The invention discloses a stamping part, and belongs to the technical field of stamping devices. The punching member has: a die holder driven to move up and down; the upper die assembly is fixed at the bottom of the die holder and moves along with the die holder; the lower die is arranged below the upper die assembly and is vertically matched with the upper die assembly; the mould comprises an upper mould component and a lower mould component, and is characterized in that an oil cylinder knockout device is arranged at the bottom of the mould base, a floating ejector rod component capable of floating up and down is arranged in the upper mould component, the oil cylinder knockout device props against the upper end of the floating ejector rod component, the lower end of the floating ejector rod component extends into a mould core groove at the bottom of the upper mould component, and the floating ejector rod component is driven by the oil cylinder knockout device. According to the invention, the floating ejector rod assembly is pushed by the oil cylinder knockout device to move downwards to eject the workpiece out of the die core groove of the upper die assembly, so that the workpiece can be separated from the upper die assembly while the upper die assembly returns, the falling height of the workpiece is small, the workpiece cannot be deformed, and the blanking quality and the yield are greatly improved.
Description
Technical Field
The invention relates to the technical field of stamping devices, in particular to a stamping part.
Background
Blanking is a stamping process in which a die is used to separate a portion of a material or work piece from another portion of the material, work piece, or scrap. The blanking is a general name of separation processes such as cutting, blanking, punching, blanking, notching, slitting, chiseling, trimming, tongue cutting, cutting and trimming, and occupies the largest proportion in the stamping production. In the blanking process, the cutting edge of the die is utilized to enable the plate to generate shearing deformation and separation along a certain contour line, and the plate does not generate plastic deformation except for metal near the shearing contour line, so that a part blanked and processed by a flat plate is still in a plane shape.
The existing punching equipment generally ejects a workpiece subjected to blanking forming from an upper die cavity by arranging a knockout rod so as to realize automatic material pushing, in the process of returning an upper die, the knockout rod is extruded by top equipment to eject the workpiece out of the upper die cavity, because the knockout rod is triggered to return the upper die to a certain height, the workpiece falls off the die cavity and is high, and the workpiece is easy to deform or even scrap on a lower die after falling and impacts, so that the product quality is seriously influenced.
Chinese patent, publication number: CN 103658390 a, application publication date: 2014.03.26, discloses a self-positioning undercut forming precision die for a stamping bearing retainer, which belongs to the field of bearing stamping retainer processing and comprises an upper die and a lower die, wherein the upper die comprises an upper template, a material withdrawing body, a forming plate, a forming female die and a knockout rod; the lower mold includes: the device comprises a bottom cutting male die, a positioning rod, a forming male die and a lower die plate. The upper die plate is driven by the press machine to move upwards, the knockout rod rises to a certain height and is extruded by equipment, the lower end of the knockout rod is propped against the stripper plate, and the stripper plate pushes the material core out of the forming plate. According to the invention, the formed workpiece is ejected out of the forming plate by the knockout rod, the knockout rod can be triggered only by returning the upper die plate to a certain height, the falling height of the workpiece is large, the workpiece is easy to deform after impacting the lower die, the quality of the workpiece is influenced, and even the workpiece is scrapped.
Disclosure of Invention
Technical problem to be solved by the invention
The invention provides a punching part, which aims at solving the problems that the falling height is large after a workpiece is separated from a die cavity due to the fact that the workpiece is punched by a punching rod in the existing punching equipment, and the workpiece is easy to deform due to the fact that the workpiece is impacted on a lower die after falling.
Technical scheme
In order to solve the problems, the technical scheme provided by the invention is as follows:
a stamped component, the stamped component having: a die holder driven to move up and down; the upper die assembly is fixed at the bottom of the die holder and moves along with the die holder; the lower die is arranged below the upper die assembly and is matched with the upper die assembly up and down, and the die holder moves down to drive the upper die assembly and the lower die to be matched to cut the material into a workpiece with a certain shape; the mould comprises an upper mould component and a lower mould component, and is characterized in that an oil cylinder knockout device is arranged at the bottom of the mould base, a floating ejector rod component capable of floating up and down is arranged in the upper mould component, the floating ejector rod component can be one group or multiple groups, the oil cylinder knockout device props the upper end of the floating ejector rod component, the lower end of the floating ejector rod component extends into a mould core groove at the bottom of the upper mould component, and the floating ejector rod component is driven by the oil cylinder knockout device to eject a workpiece out of the mould core groove.
Furthermore, the oil cylinder knockout device comprises an oil cylinder and a stripper plate, the oil cylinder is inversely fixed at the bottom of the die holder, the stripper plate is fixed at the tail end of a piston rod of the oil cylinder, and the piston rod drives the stripper plate to move up and down so as to achieve the purpose of pushing the floating ejector rod assembly.
Further, the die holder bottom is provided with the mounting groove, the hydro-cylinder knockout device sets up in the mounting groove, in order to reach and give go up the mould subassembly and give out mounted position's purpose, the mounting groove is cylindrical straight flute or ladder groove.
Furthermore, the mounting groove comprises an outer groove and an inner groove, the oil cylinder is fixed in the inner groove, and the stripper plate is located in the outer groove so as to protect the oil cylinder and avoid the stripper plate from inclining and shaking.
Furthermore, the material returning plate at least has a distance corresponding to the thickness of the workpiece from the notch of the mounting groove so as to achieve the purpose of yielding the upper end of the floating ejector rod assembly.
The upper die assembly further comprises a cover plate and an upper die body, the cover plate is fixedly connected with the upper die body up and down, a step hole is formed in the upper die body, a through hole matched with the step hole is formed in the cover plate, the floating ejector rod assembly is arranged in the step hole, the upper end of the floating ejector rod assembly extends out of the through hole, and the lower end of the floating ejector rod assembly penetrates through the step hole to reach the bottom of the die core groove; the step hole has a guiding function on the movement of the floating ejector rod assembly.
Further, the floating ejector rod assembly comprises an ejector rod and a spring, the upper end of the ejector rod extends out of the through hole, and the lower end of the ejector rod penetrates through the stepped hole to reach the bottom of the die core groove; the spring is sleeved in the middle of the ejector rod, the upper end of the spring props against the upper part of the ejector rod, and the lower end of the spring props against the step in the step hole. The spring is compressed when the ejector rod is stressed to sink, and the ejector rod is reset by the spring rebounding after the external force is removed, so that the floating ejector rod assembly is not in contact with a workpiece when the die is closed, and the workpiece is prevented from being deformed due to the fact that the lower end of the floating ejector rod assembly excessively extrudes the workpiece.
Furthermore, a plurality of groups of floating ejector rod assemblies are arranged in the upper die assembly, force application is dispersed and applied to the workpiece, and the workpiece is prevented from deforming.
Further, the number of the floating ejector rod assemblies is 4-8.
Furthermore, a plurality of groups of floating ejector rod assemblies surround the central axis of the die core groove and are uniformly distributed, so that the force application points of the workpiece are uniformly dispersed around the center of the workpiece, the phenomenon of stress concentration is further avoided, and meanwhile, the edge deformation of the workpiece can be prevented.
Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) the invention provides a stamping part which comprises a die holder, an upper die assembly and a lower die, wherein an oil cylinder knockout device is arranged at the bottom of the die holder, a floating ejector rod assembly capable of floating up and down is arranged in the upper die assembly, and the oil cylinder knockout device is matched with the floating ejector rod assembly, so that a workpiece can be separated from the upper die assembly while the upper die assembly returns, the falling height of the workpiece is small, the workpiece cannot be deformed, and the blanking quality is greatly improved; the punching die can be used for punching thin plate workpieces with the thickness of less than 0.5mm, and the punching yield is as high as more than 99.5%;
(2) according to the stamping part, the oil cylinder is matched with the stripper plate, the floating ejector rod assembly is pushed to move through the stripper plate, the stripper plate has a large coverage area, and is matched with the floating ejector rod assembly, so that the deviation phenomenon cannot occur, the floating ejector rod assembly is uniformly and stably stressed, the process of separating a workpiece from an upper die assembly is stable and reliable, and the workpiece is not easy to deform; in addition, when the floating ejector rod assemblies are in multiple groups, synchronous movement of the floating ejector rod assemblies can be ensured, so that the surface of the workpiece is uniformly stressed and is not deformed;
(3) according to the stamping component, the bottom of the die holder is provided with the mounting groove, and the oil cylinder knockout device is arranged in the mounting groove, so that the purpose of giving way to the mounting position of the upper die assembly is achieved, the upper die assembly is convenient to mount, meanwhile, the effective utilization of space is realized, and the equipment investment cost is saved;
(4) according to the stamping part provided by the invention, the mounting groove comprises the outer groove and the inner groove, the oil cylinder is fixed in the inner groove, the stripper plate is positioned in the outer groove, and the outer wall of the oil cylinder is tightly matched with the inner wall of the inner groove, so that the oil cylinder can be prevented from being stressed and shaken, and the movement of the stripper plate is more stable; when the stripper plate returns to the outer groove, the top surface of the stripper plate is limited by the bottom of the outer groove, so that the stripper plate is prevented from inclining;
(5) according to the stamping part provided by the invention, at least a distance equivalent to the thickness of a workpiece is reserved from the stripper plate to the notch of the mounting groove, so that the purpose of yielding the upper end of the floating ejector rod component is achieved;
(6) the upper die assembly also comprises a cover plate and an upper die body, wherein a step hole is formed in the upper die body, a through hole matched with the step hole is formed in the cover plate, the floating ejector rod assembly is arranged in the step hole, the upper end of the floating ejector rod assembly extends out of the through hole, and the lower end of the floating ejector rod assembly penetrates through the step hole to the bottom of the die core groove; the step hole has a guiding function on the movement of the floating ejector rod assembly, the floating ejector rod assembly is limited up and down by the matching of the cover plate and the upper die body, so that the floating ejector rod assembly floats up and down in the step hole, the structure is simple, and the die sinking cost is low;
(7) the invention provides a stamping part, wherein a floating ejector rod assembly comprises an ejector rod and a spring, the spring is compressed when the ejector rod is stressed and sinks, and the ejector rod is reset by the resilience of the spring after external force is removed, so that the floating ejector rod assembly is not contacted with a workpiece when the die is closed, and the workpiece is prevented from being deformed due to the fact that the lower end of the floating ejector rod assembly excessively extrudes the workpiece;
(8) according to the stamping part, the upper die assembly is internally provided with the plurality of groups of floating ejector rod assemblies, so that the force is applied to the workpiece in a dispersed manner, and the workpiece is prevented from deforming;
(9) according to the stamping part provided by the invention, the plurality of groups of floating ejector rod assemblies are uniformly distributed around the central axis of the die core groove, so that the force application points of the workpiece are uniformly dispersed around the center of the workpiece, the phenomenon of stress concentration is further avoided, the edge deformation of the workpiece can be prevented, and the quality of the workpiece is improved;
(10) according to the stamping part provided by the invention, the upper die assembly is internally provided with 6 groups of floating ejector rod assemblies, and the stamping part can be suitable for a punch with the thickness of 0.2mm and the area of 300-400 cm2And (3) blanking a thin plate workpiece, wherein the qualified rate of a finished product is up to 99.6%.
Drawings
FIG. 1 is a schematic view of the structure of the punch member of the present invention;
FIG. 2 is a partial cross-sectional view of the die holder of the present invention;
FIG. 3 is a bottom view of the die holder of the present invention;
FIG. 4 is a schematic structural diagram of the oil cylinder knockout device in the invention;
FIG. 5 is a schematic diagram of the position of the floating ram assembly in the upper die assembly of the present invention.
In the drawings: 200. a die holder; 210. mounting grooves; 211. an outer tank; 212. an inner tank; 300. an oil cylinder knockout device; 310. an oil cylinder; 311. a piston rod; 320. a material returning plate; 400. an upper die assembly; 410. a floating ejector rod assembly; 411. a top rod; 412. a spring; 420. a cover plate; 421. a through hole; 430. an upper die body; 431. a stepped bore; 440. a die core groove; 500. a lower die; 510. a mold core boss; 600. and (5) a workpiece.
Detailed Description
For a further understanding of the present invention, reference will now be made in detail to the embodiments illustrated in the drawings.
Example 1
A stamped component, as shown in fig. 1, having: a die holder 200 installed on the punch and driven by the punch to move up and down; the upper die assembly 400 is fixed at the bottom of the die holder 200 and moves along with the die holder 200, and the upper die assembly 400 is detachably connected with the die holder 200 through bolts; the lower die 500 is fixed on a mounting table which is positioned below the upper die assembly 400 on the punching machine and is vertically matched with the upper die assembly 400, and the lower die 500 is detachably connected with the mounting table through bolts; the bottom of the die holder 200 is provided with an oil cylinder knockout device 300, a floating ejector rod component 410 capable of floating up and down is arranged in the upper die component 400, the oil cylinder knockout device 300 props against the upper end of the floating ejector rod component 410, the lower end of the floating ejector rod component 410 extends into a die core groove 440 at the bottom of the upper die component 400, and the floating ejector rod component 410 is driven by the oil cylinder knockout device 300 to enable the lower end to prop against a workpiece 600 clamped in the die core groove 440 and drive the workpiece 600 to move from the inside of the die core groove 440 to a notch.
The number of the floating ejector rod assemblies 410 is set according to the size of the machined workpiece 600, and only one group of floating ejector rod assemblies 410 can be arranged for the workpiece 600 with smaller size; for a workpiece 600 with a large size, the single group of floating ejector rod assemblies 410 pushes the workpiece 600, so that the workpiece 600 is easy to deform, and the multiple groups of floating ejector rod assemblies 410 can be arranged to uniformly apply force to the surface of the workpiece 600, so as to achieve the purpose of preventing the workpiece 600 from deforming.
When a workpiece 600 is punched, a punch press is started to drive the die holder 200 to move downwards, the upper die assembly 400 is driven to move downwards to be matched with the lower die 500, a die core groove 440 in the upper die assembly 400 is matched with a die core boss 510 in the lower die 500 to cut materials into the workpiece 600 with a certain shape, and the cut workpiece 600 is clamped in the die core groove 440 in the bottom of the upper die assembly 400; then, the die holder 200 is driven to return, and the upper die assembly 400 is driven to move upwards; simultaneously, the oil cylinder material beating device 300 is started, the oil cylinder material beating device 300 props against the upper end of the floating ejector rod component 410 and pushes the floating ejector rod component to move downwards, so that the lower end of the floating ejector rod component extends out of the bottom of the mold core groove 440 of the upper mold component 400, and the workpiece 600 is ejected out of the mold core groove 440 and separated from the upper mold component 400; then the cylinder knockout device 300 is reset.
In the punching component in the embodiment, the oil cylinder knockout device 300 is matched with the floating ejector rod assembly 410, so that the workpiece 600 can be separated from the upper die assembly 400 while the upper die assembly 400 returns, the falling height of the workpiece 600 is small, the workpiece 600 cannot be deformed, and the punching quality is greatly improved; can be used for punching thin plate workpieces with the thickness of less than 0.5mm, and the punching yield reaches more than 99.5 percent.
Example 2
The basic structure of the stamping component of this embodiment is the same as that of embodiment 1, and the difference and improvement lies in that, as shown in fig. 4, the oil cylinder ramming device 300 includes an oil cylinder 310 and a stripper plate 320, the oil cylinder 310 is fixed at the bottom of the die holder 200 in an inverted manner and is connected with the bottom of the die holder 200 through a bolt, the stripper plate 320 is fixed at the end of a piston rod 311 of the oil cylinder 310, and the piston rod 311 drives the stripper plate 320 to move up and down.
After the oil cylinder 310 is started, the piston rod 311 extends out to drive the stripper plate 320 to move downwards, the bottom of the stripper plate 320 abuts against the upper end of the floating ejector rod component 410 to enable the stripper plate to move towards the mold core groove 440, and the workpiece 600 is ejected from the mold core groove 440, so that the purpose of separating the workpiece 600 from the upper mold component 400 is achieved; and then the piston rod 311 of the control cylinder 310 returns to drive the stripper plate 320 to return to the initial position.
In the stamping part in this embodiment, the oil cylinder knockout device 300 adopts the matching of the oil cylinder 310 and the stripper plate 320, and pushes the floating ejector rod assembly 410 to move through the stripper plate 320, because the stripper plate 320 has a large coverage area, and no deviation phenomenon exists when being matched with the floating ejector rod assembly 410, the floating ejector rod assembly 410 is uniformly and stably stressed, so that the process of separating the workpiece 600 from the upper die assembly 400 is stable and reliable, and the workpiece 600 is not easy to deform; in addition, when the floating push rod assemblies 410 are in multiple groups, synchronous movement of the floating push rod assemblies 410 can be ensured, so that the surface of the workpiece 600 is uniformly stressed and is not deformed.
Example 3
The basic structure of the stamping part of this embodiment is the same as that of embodiment 2, and the difference and improvement lies in that, as shown in fig. 1, the bottom of the die holder 200 is provided with an installation groove 210, and the oil cylinder knockout device 300 is arranged in the installation groove 210, so as to achieve the purpose of giving an installation position to the upper die assembly 400.
The mounting groove 210 is a cylindrical straight groove or a stepped groove, and in this embodiment the mounting groove 210 is a cylindrical straight groove, and has a uniform inner diameter along the axis direction thereof, and is easy to process.
In the blanking process, the oil cylinder 310 is started, the piston rod 311 of the oil cylinder extends out to push the stripper plate 320 out of the mounting groove 210, the stripper plate 320 abuts against the floating ejector rod assembly 410 to move, and the workpiece 600 is ejected out of the die core groove 440; then the piston rod 311 of the control cylinder 310 is reset, so that the stripper plate 320 is retreated into the mounting groove 210 again.
In the punching component in the embodiment, because the oil cylinder material beating device 300 is installed in the installation groove 210 in a buried mode, the installation space at the bottom of the die holder 200 is saved, the installation of the upper die assembly 400 is facilitated, the sizes of the components after the die holder 200, the oil cylinder material beating device 300 and the upper die assembly 400 are matched are reduced, the effective utilization of the space is realized, and the equipment investment cost is saved.
Example 4
The basic structure of a stamping part of this embodiment is the same as that of embodiment 3, and the difference and improvement lies in that, as shown in fig. 2 and 3, the mounting groove 210 is a stepped groove and comprises an outer groove 211 and an inner groove 212, the diameter of the outer groove 211 is larger than that of the inner groove 212, the oil cylinder 310 is fixed in the inner groove 212, and the stripper plate 320 is positioned in the outer groove 211.
Because the size of the stripper plate 320 is larger than the diameter of the oil cylinder 310, the inner diameter of the installation groove 210 is larger than the outer diameter of the oil cylinder 310 when the installation groove 210 is a cylindrical straight groove, after the oil cylinder 310 is fixed in the installation groove 210, the side wall of the oil cylinder is not limited and clamped, the stripper plate 320 is easy to shake under stress, and unstable motion of the stripper plate may be caused, when the floating ejector rod assemblies 410 are in multiple groups, the floating ejector rod assemblies 410 are easy to move asynchronously, so that the workpiece 600 is deformed under local stress; long-term shaking of the cylinder 310 may even cause damage to the cylinder 310.
In this embodiment, the outer wall of the oil cylinder 310 is tightly fitted with the inner wall of the inner groove 212, so that the oil cylinder 310 can be prevented from being stressed and shaken, and the stripper plate 320 can move more stably; when the stripper plate 320 is withdrawn into the outer groove 211, the top surface of the stripper plate is limited by the bottom of the outer groove 211, so that the stripper plate 320 is prevented from being inclined.
Example 5
The basic structure of the stamping part of this embodiment is the same as that of embodiment 3 or 4, and the difference and improvement lies in that a distance corresponding to the thickness of the workpiece 600 is at least left from the stripper plate 320 to the notch of the mounting groove 210, so as to achieve the purpose of yielding the upper end of the floating ejector rod assembly 410.
When the depth of the die core groove 440 is just equal to the thickness of the workpiece 600, the floating ejector rod component 410 only needs to extend into the die core groove 440 by a length equal to the thickness of the workpiece 600 to push out the workpiece 600, at the moment, the distance from the stripper plate 320 to the notch of the mounting groove 210 is equal to the thickness of the workpiece 600, the upper end of the floating ejector rod component 410 extends into the mounting groove 210 to contact with the stripper plate 320, and after the oil cylinder 310 is started, the piston rod 311 of the oil cylinder 310 only needs to extend out by a length equal to the thickness of the workpiece 600 to enable the workpiece 600 to be separated from the die core groove 440, so.
When the depth of the die core groove 440 is greater than the thickness of the workpiece 600, the length of the lower end of the floating ejector rod component 410, which needs to extend into the die core groove 440, is at least equal to the distance from the workpiece 600 to the notch of the die core groove 440, so that the workpiece 600 can be pushed out of the die core groove 440, the distance from the stripper plate 320 to the notch of the mounting groove 210 is greater than the thickness of the workpiece 600, and at least the length of the lower end of the floating ejector rod component 410, which needs to extend into the mounting groove 210, can fully give way to the upper end of the floating ejector rod component 410.
Example 6
A stamping part of this embodiment, the basic structure of which is the same as any one of embodiments 1 to 5, and the difference and improvement lies in that, as shown in fig. 1 and 5, the upper die assembly 400 further includes a cover plate 420 and an upper die body 430, the cover plate 420 and the upper die body 430 are fixedly connected up and down, specifically, detachably and fixedly connected through bolts, a step hole 431 is provided on the upper die body 430, a through hole 421 matching with the step hole 431 is provided on the cover plate 420, the floating ejector rod assembly 410 is provided in the step hole 431, the upper end extends out of the through hole 421, and the lower end passes through the step hole 431 to the bottom of the die core groove 440; the stepped bore 431 provides a guide for the movement of the floating ram assembly 410.
In the punching part in this embodiment, the cover plate 420 and the upper die body 430 are matched to limit the floating ejector rod assembly 410 up and down, so that the floating ejector rod assembly floats up and down in the stepped hole 431, and the punching part is simple in structure and low in die opening cost.
Example 7
A punch member of the present embodiment, the basic structure is the same as that of embodiment 6, and is different and improved in that, as shown in fig. 5, the floating push rod assembly 410 includes a push rod 411 and a spring 412, the upper end of the push rod 411 protrudes from the through hole 421, and the lower end passes through the stepped hole 431 to the bottom of the die core groove 440; the spring 412 is sleeved in the middle of the ejector rod 411, the upper end of the spring abuts against the upper portion of the ejector rod 411, and the lower end of the spring abuts against a step in the step hole 431.
When the ejector rod 411 is stressed and sinks, the spring 412 is compressed, after the external force is removed, the spring 412 rebounds to reset the ejector rod 411, so that the floating ejector rod assembly 410 is not contacted with the workpiece 600 during die assembly, and the workpiece 600 is prevented from being deformed due to the fact that the lower end of the floating ejector rod assembly excessively extrudes the workpiece 600.
Example 8
A stamping part of this embodiment has the same basic structure as that of embodiment 6 or 7, and is different and improved in that the floating ejector assembly 410 only includes the ejector 411, the ejector 411 is disposed in the stepped hole 431, and in an inoperative state, the upper end of the ejector 411 is immersed in the through hole 421 of the cover plate 420, and the lower end of the ejector 411 passes through the stepped hole 431 and extends into the die core groove 440 and at least extends to the notch of the die core groove 440.
When the workpiece 600 is punched, after the upper die assembly 400 and the lower die 500 are assembled, the cut workpiece 600 is clamped in the die core groove 440 at the bottom of the upper die assembly 400, and the ejector rod 411 is pushed to move upwards to enable the upper end of the ejector rod to extend out of the upper opening of the through hole 421; when the upper die assembly 400 returns, the oil cylinder material beating device 300 is controlled to be started, the oil cylinder material beating device 300 props against the upper end of the ejector rod 411 and pushes the ejector rod to move downwards to eject the workpiece 600 out of the die core groove 440; and then controlling the oil cylinder knockout device 300 to return to the initial position.
The press member of the present example was applicable to punching of a sheet workpiece having a thickness of 0.5mm, and the punching yield was 99.8%.
Example 9
The basic structure of the stamping part of this embodiment is the same as that of any one of embodiments 1 to 8, and the difference and improvement lies in that, as shown in fig. 1, a plurality of groups of floating ejector rod assemblies 410, preferably 4 to 8 groups, are arranged in the upper die assembly 400; when the number of the groups is less than 4, the number of the force application points to the workpiece 600 is small, stress concentration is likely to occur, and the workpiece 600 is deformed; when the number of the groups is more than 8, the floating resistance is large, the power requirement on the oil cylinder knockout device 300 is high, the energy consumption is high, and the self cost and the use cost of the equipment are improved; when the number is 4 ~ 8 groups, the application of force is even to work piece 600, and the energy consumption is moderate simultaneously.
The plurality of groups of floating ejector rod assemblies 410 are uniformly distributed around the central axis of the die core groove 440, so that the force application points to the workpiece 600 are uniformly dispersed around the center of the workpiece, the phenomenon of stress concentration is further avoided, the edge deformation of the workpiece 600 can be prevented, and the quality of the workpiece 600 is improved.
Punching press part in this embodiment, be provided with 6 groups in going up mould subassembly 400 unsteady ejector pin subassembly 410 can be applicable to thickness and be 0.2mm, and the area is 300 ~ 400cm2And (3) blanking a thin plate workpiece, wherein the qualified rate of a finished product is up to 99.6%.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (3)
1. A press part, comprising,
a die holder (200) driven to move up and down;
the upper die assembly (400) is fixed at the bottom of the die holder (200) and moves along with the die holder (200);
a lower die (500) disposed below the upper die assembly (400) and vertically engaged with the upper die assembly (400); the method is characterized in that:
an oil cylinder knockout device (300) is arranged at the bottom of the die holder (200), a floating ejector rod assembly (410) capable of floating up and down is arranged in the upper die assembly (400), the oil cylinder knockout device (300) props against the upper end of the floating ejector rod assembly (410), the lower end of the floating ejector rod assembly (410) extends into a die core groove (440) at the bottom of the upper die assembly (400), and the floating ejector rod assembly (410) is driven by the oil cylinder knockout device (300) and is used for blanking a thin plate workpiece (600) with the thickness of less than 0.5 mm;
the oil cylinder knockout device (300) comprises an oil cylinder (310) and a stripper plate (320), wherein the oil cylinder (310) is inversely fixed at the bottom of the die holder (200), and the stripper plate (320) is fixed at the tail end of a piston rod (311) of the oil cylinder (310);
the bottom of the die holder (200) is provided with an installation groove (210), and the oil cylinder knockout device (300) is arranged in the installation groove (210); the mounting groove (210) comprises an outer groove (211) and an inner groove (212), the oil cylinder (310) is fixed in the inner groove (212), and the stripper plate (320) is positioned in the outer groove (211); a distance equivalent to the thickness of the workpiece (600) is reserved from the stripper plate (320) to the notch of the mounting groove (210);
the upper die assembly (400) is internally provided with 6 groups of floating ejector rod assemblies (410), and the 6 groups of floating ejector rod assemblies (410) are uniformly distributed around the central axis of the die core groove (440).
2. A punch member according to claim 1, wherein: go up mould subassembly (400) and still include apron (420) and last mould body (430), apron (420) and last mould body (430) upper and lower fixed connection, upward be provided with step hole (431) on mould body (430), be provided with on apron (420) with step hole (431) matched with through-hole (421), floating ejector pin subassembly (410) set up in step hole (431), the upper end is followed through-hole (421) stretch out, and the lower extreme passes step hole (431) extremely the bottom of mould core groove (440).
3. A punch member according to claim 2, wherein: the floating ejector rod assembly (410) comprises an ejector rod (411) and a spring (412), the upper end of the ejector rod (411) extends out of the through hole (421), and the lower end of the ejector rod passes through the stepped hole (431) to the bottom of the die core groove (440); the spring (412) is sleeved in the middle of the ejector rod (411), the upper end of the spring props against the upper portion of the ejector rod (411), and the lower end of the spring props against a step in the step hole (431).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910249246.5A CN109772996B (en) | 2019-03-29 | 2019-03-29 | Stamping part |
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| CN201910249246.5A CN109772996B (en) | 2019-03-29 | 2019-03-29 | Stamping part |
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| CN109772996A CN109772996A (en) | 2019-05-21 |
| CN109772996B true CN109772996B (en) | 2021-01-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US225429A (en) * | 1880-03-09 | Machine for punching nuts | ||
| CN2096429U (en) * | 1991-06-26 | 1992-02-19 | 金丰机器工业股份有限公司 | Punch press prepressing type demould apparatus |
| CN201618796U (en) * | 2009-12-04 | 2010-11-03 | 江苏新炜实业有限公司 | Cold stamping die of aluminium foil container |
| CN202861099U (en) * | 2012-09-20 | 2013-04-10 | 中山复盛机电有限公司 | Intermittent cutting-off mechanism |
| CN203061759U (en) * | 2013-03-05 | 2013-07-17 | 金丰（中国）机械工业有限公司 | Multistation air sac type upper ejection device |
| CN203316633U (en) * | 2013-05-27 | 2013-12-04 | 上海工程技术大学 | Improved discharged material ejecting structure of blanking die |
| CN203370993U (en) * | 2013-05-31 | 2014-01-01 | 徐州昊鼎机械有限公司 | Upper die automatic material returning device |
| CN203565744U (en) * | 2013-11-15 | 2014-04-30 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Upper ejector for large hot die forging press die |
| CN203830561U (en) * | 2014-05-28 | 2014-09-17 | 宁波意美捷影视设备有限公司 | Bent pipe die of camera support |
| CN204209025U (en) * | 2014-10-11 | 2015-03-18 | 南通锻压设备股份有限公司 | A kind of discharging device of punching machine |
| CN205074386U (en) * | 2015-09-20 | 2016-03-09 | 合肥长胜机电科技有限公司 | A blanking mould that punches a hole for producing compressor valve piece |
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2019
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| CN109772996A (en) | 2019-05-21 |
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