CN110355258B - Application method of stamping die - Google Patents
Application method of stamping die Download PDFInfo
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- CN110355258B CN110355258B CN201910658247.5A CN201910658247A CN110355258B CN 110355258 B CN110355258 B CN 110355258B CN 201910658247 A CN201910658247 A CN 201910658247A CN 110355258 B CN110355258 B CN 110355258B
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- fixed core
- core rod
- die
- frequency welding
- rectangular tube
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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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/04—Centering the work; Positioning the 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
Abstract
The invention discloses a using method of a stamping die, which solves the problem of stamping and cutting of a high-frequency welding rectangular tube, wherein an upper cutting edge is formed by a cutter and a floating mandrel arranged in a workpiece; the lower cutting edge is formed by the feeding ports of the fixed core rod and the feeding body, when a workpiece enters a limited position from the feeding port, the upper auxiliary cutting edge and the lower auxiliary cutting edge are sheared simultaneously, then the workpiece is unloaded from the fixed core rod by the unloading device, the punching operation can be carried out very efficiently, the positioning precision is high, the cost is low, the labor cost is greatly saved, and the working is stable.
Description
Technical Field
The invention relates to the field of processing and manufacturing, in particular to a stamping die.
Background
A mold is a common process equipment in the production of industrial products, which shapes (shapes) the raw material in a certain way in its own particular shape. In modern product production, the die is more and more widely applied due to the characteristics of high processing efficiency, good interchangeability, raw material saving and the like.
With the rapid development of economy, the demand of various industries on steel is continuously increased, and stainless steel is generally applied to industries such as oil well pipelines, aerospace, automobile industry, engineering construction, food machinery and the like due to excellent corrosion resistance, good mechanical property and attractive appearance. In recent years, high-frequency welding rectangular tubes are used as typical stainless steel welding steel, and are widely applied to the fields of vehicles, subways, buildings, ships and the like due to the irreplaceable advantages of high strength, large bending-resistant section modulus, easiness in assembly, stability, attractiveness and the like.
In the stamping and blanking production of the high-frequency welding rectangular tube, in order to ensure the quality of the high-frequency welding rectangular tube after stamping and blanking and the production period as short as possible, the reasonability of the structural design of a die and proper stamping technological parameters needs to be ensured. For the high-frequency welding rectangular tube, the stamping and cutting are basically free of loss, so that the cost can be reduced; secondly stamping die's production efficiency is high, prior art CN207343554U discloses a nonrust steel pipe welding mouth of pipe stamping die, however this mould still is a device is decided to ordinary, unable accurate positioning and unloading, prior art CN204866891U discloses a nonrust steel pipe forming device, although this prior art has improved the positioning accuracy, but the operation is complicated relatively, only forming mechanism, can not be effectively to the pipe blanking, prior art CN104368670A discloses a nonrust steel pipe welding mouth of pipe stamping die, but this technical structure is complicated, can not effectively blank to tubular structure, consequently, need wait for a novel efficient stamping die urgently.
Disclosure of Invention
Accordingly, in view of the disadvantages in the related art, examples of the present invention are provided to substantially solve one or more problems due to limitations and disadvantages of the related art, to substantially improve safety and reliability, and to effectively protect equipment.
According to the technical scheme provided by the invention, the stamping die comprises a lower die base and an upper die base, wherein the lower die base is connected with the upper die base through four guide pillars, the upper die base can slide towards the lower die base along the guide pillars, a blanking groove is arranged on the lower die base, a feeding port mounting base is arranged on one side of the lower die base, a feeding body is arranged on the feeding port mounting base, the feeding body is provided with a feeding port, a fixed core mounting base is arranged on the lower surface of the upper die base, a groove is arranged on the fixed core mounting base, a fixed core rod is arranged in the groove, a positioning block is further arranged on the lower portion of the fixed core mounting base, the positioning block is positioned right below the fixed core rod, a through hole is further formed in the fixed core mounting base, two semicircular grooves are respectively formed in the upper portion and the lower portion of the fixed core rod, a notch is further formed in the middle of, stamping die still has discharge apparatus, discharge apparatus includes upper and lower two sets of subassemblies of unloading, every group subassembly of unloading includes two unloading sticks, upper and lower two sets of subassemblies of unloading can be followed and run through the opening and worn out, still be equipped with return spring on every unloading stick, wherein four unloading sticks can correspond respectively with four half slot cooperations, four unloading sticks are connected on two risers, set up in opposite directions on two risers, be connected with the axle between two risers, the centre of axle is equipped with the axle sleeve, the both ends of axle are equipped with fixed guide plate, the axle sleeve cooperates and is used for controlling the time that the stick of unloading released forward with the dog, still be equipped with the die shank on the upper die base, the die shank is connected the upper die base on the press slider.
Furthermore, the workpiece to be punched is of a tubular structure, a floating core rod is arranged in the workpiece and can freely slide in the workpiece, the floating core rod is fixed through an iron rod penetrating through the tail of the workpiece, and the size of the floating core rod is slightly larger than that of the fixed core rod.
Furthermore, the cutter and the floating core rod arranged in the workpiece form an upper cutting edge; the fixed core rod and the feeding body form a lower cutting edge, when a workpiece enters a limited position from the feeding port, the upper and lower secondary cutting edges are sheared simultaneously, and then the workpiece is unloaded from the fixed core rod by the unloading device.
Furthermore, the feeding port mounting seat is provided with an inclined plane which inclines inwards, and the feeding port mounting seat is welded on the lower die seat.
Furthermore, two corresponding threaded holes are respectively arranged in the groove of the fixed core mounting seat and on the fixed core rod and are connected by an inner hexagonal bolt.
Furthermore, after the fixed core rod is completely inserted into the groove, the length of the positioning block subtracted from the residual length is just equal to the radial length of the punched workpiece.
Furthermore, the center of the fixed core rod and the center of the feeding port are at the same height, the position of the cutter mounting frame on the upper die base corresponds to the feeding port, the position of the fixed core mounting frame corresponds to the position of the cutter mounting frame, and the distance between the fixed core rod and the fixed core mounting frame is the distance between the fixed core rod and the fixed core rod, which is the distance between the fixed core rod and the fixed core mounting frame, and the depth of the groove and the width of.
Furthermore, the contact surface of the stop block and the shaft is an inclined surface.
The invention solves the problem of stamping and cutting of the high-frequency welding rectangular tube, and the cutter and the floating mandrel arranged in the workpiece form an upper cutting edge; the lower cutting edge is formed by the feeding ports of the fixed core rod and the feeding body, when a workpiece enters a limited position from the feeding port, the upper auxiliary cutting edge and the lower auxiliary cutting edge are sheared simultaneously, then the workpiece is unloaded from the fixed core rod by the unloading device, the punching operation can be carried out very efficiently, and the device has the characteristics of high positioning precision, low cost, stable work and the like.
Drawings
Fig. 1 is an overall schematic view of a press die according to the present invention.
Fig. 2 is an exploded view of the stamping die of the present invention.
Fig. 3 is a schematic diagram of a detailed structure of the stamping die of the present invention.
Fig. 4 is an exploded view of a detail of the stamping die of the present invention.
Fig. 5 is a schematic view of the operation of the fixed mandrel of the present invention.
FIG. 6 is a schematic view of the floating mandrel of the present invention.
Fig. 7 is a schematic structural view of the feeding body of the present invention.
Fig. 8 is a schematic view of the structure of the fixed mandrel of the present invention.
Fig. 9 is a schematic view of the floating mandrel structure of the present invention.
Fig. 10 is a schematic view of the structure of the cutter according to the present invention.
Fig. 11 is a schematic view of the structure of the feeding port mounting base of the present invention.
Fig. 12 is a schematic structural view of the core fixing mounting seat of the present invention.
Fig. 13 is a schematic view of the structure of the discharging rod of the invention.
Fig. 14 is a schematic view of the stopper of the present invention.
Fig. 15 is a schematic view of the die shank structure of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples.
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.
The application of the principles of the present invention will be further described with reference to the accompanying drawings and specific embodiments. For high-frequency welding steel, the length of the cut steel pipe is required to be within a required range, and the stamping die can be completely ensured. However, the steel pipe is a hollow structure, and the steel pipe is deformed by sinking during stamping, and the deformation is large, so that the normal operation of the subsequent shaping process cannot be ensured.
Although the shape of the part is ensured, the part is also deformed by the recess near the cut part, which affects the subsequent production, so that a floating core rod is required to be put in the steel pipe, and the floating core rod can freely slide in the steel pipe.
The stamping die is shown in fig. 3. The die consists of two sets of cutting edges, wherein the upper cutting edge consists of a cutter arranged on an upper die base and a floating mandrel arranged in a steel pipe; the fixed core rod arranged on the upper die base and the feeding body arranged on the lower die base form a lower cutting edge. After the steel pipe enters the limited position of the positioning block from the feeding port, the upper auxiliary cutting edge and the lower auxiliary cutting edge are sheared simultaneously, and then the workpiece is unloaded from the fixed core rod by the unloading mechanism.
Determination of center of pressure:
the die pressure center refers to the action point of the stamping pressure resultant of each stamping part during stamping. To ensure proper operation of the press and die, the center of pressure of the punch die should coincide with the center of the press ram. For a press die with a die shank, the center of pressure should pass through the axial center line of the die shank. Otherwise, eccentric load can be generated between the punching die and the press slide block, excessive abrasion can be generated between the slide block and the guide rail, the die guide part is abraded in an accelerated way, and the service life of the die and the press is shortened.
The center of pressure of the die can be determined according to the following principle:
the single blanking part is symmetrical in shape, the pressure center of a die is the geometric center of the blanking part, and the pressure center of the die is located at the midpoint of a straight line section during blanking of the straight line section.
And secondly, when the workpieces have the same shape and are symmetrically distributed, the pressure center of the stamping die is superposed with the symmetric center of the part.
Thirdly, when punching a part with a complex shape or a part with multiple male dies, the pressure center can be obtained by an analytical calculation method, when the steel pipe part is cut, punching force acts on two vertically symmetrical edges, so that the pressure center of the punching die is the midpoint of the edge.
For the stamping die, the stamping die has higher requirements on the blanking force, and the purpose of calculating the blanking force is to reasonably select a press and design the die. The blanking force is the maximum shearing resistance in the blanking process, and is changed along with the depth of the upper die base cutting into the material, when the material reaches the shearing strength, cracks are generated, the materials are separated from each other, and the maximum value of the blanking force is obtained. The press is selected in terms of the maximum force of the blanking force.
The cutting of the high frequency welding rectangular pipe part can be summarized into three stages. In the first stage, the upper and lower parallel planes of the part are in contact with a cutter; the second stage is that when the cutter cuts the round corner of the part, the shearing force changes; the third stage is to take place in a small distance between the two ends of the part, at which time the tool no longer produces a shearing action on the part, but produces a tensile force to break the part.
Therefore, for the press, the selection of the press is performed according to the production batch, the process method and the property of the stamping parts, and the requirements of the size, the shape, the precision and the like of the stamping parts. The high-frequency welding rectangular pipe part is not large, the precision requirement is relatively appropriate, mass production is required, the production efficiency is high, and an open mechanical press can be selected comprehensively. From the aspects of improving the working rigidity of the equipment, improving the precision of stamping parts and prolonging the service life of the equipment, the equipment capacity is required to have larger surplus. For the present application, a 30% to 40% margin is left on the equipment, so the press tonnage is preferably no less than 247 KN. And the die height of the press must be greater than the total die height. The invention therefore selects a 250KN open inclinable press, the parameters of which are shown in the following table.
| Item | Unit of | Value of | |
| Nominal pressure | kN | 250 | |
| Nominal | mm | 6 | |
| Travel of slide | mm | 80 | |
| Travel of slideNumber of times | Times/min | 100 | |
| Maximum die height | mm | 250 | |
| Height adjustment of die | mm | 70 | |
| Distance from center of slide block to bed | mm | 190 | |
| Column spacing | mm | 260 | |
| Size of the working table | mm | 560×360 | |
| Size of worktable hole | mm | φ180 | |
| Die shank hole size | mm | Φ50×70 | |
| Thickness of working table | mm | 70 | |
| Angle of inclination | Deg | 30° |
Selection of the mould frame
Because the bracket of the die assembly is required to meet the requirement of mass production, the die assembly selects the four guide posts 3 which are balanced in stress, high in guide precision and suitable for mass production to form the die frame, so that the service life of the die and the quality of products are ensured. Because the stamping die does not have a concave die, a standard die frame is not adopted. Specifically, the invention adopts the lower die holder with the specification of 1 400 multiplied by 300 multiplied by 40 (unit mm), the upper die holder with the specification of 2 multiplied by 300 multiplied by 30 (unit mm), the upper die holder and the lower die holder are made of 45 steel and need to be quenched and tempered, the guide pillar 3 adopts an A-shaped guide pillar with the diameter of 25mm, the tolerance zone of h5 and the length of 300mm, and the guide pillar is made of 20Cr and needs to be quenched.
Selection of material-feeding bodies
The material feeding body 5 is a part of a feeding part and a punching part, and the size and material selection of the material feeding body are very critical, because if the size is smaller, feeding is inconvenient, normal production of workers is influenced, and production efficiency is influenced. But the smaller size is advantageous to ensure the shape and size of the workpiece. If the size is larger, feeding is easier, but the workpiece deforms greatly during shearing. The tolerance requirements of the workpiece are taken into account in the dimensioning.
In general, in the production of a high-frequency welded rectangular pipe, the dimension of the steel pipe can be controlled within a tolerance range of ± 0.3 mm, but in the production process, the steel pipe needs to be cut to a certain length, the cut part is deformed, the width is generally reduced, the height is generally increased, and the deformation amount can be close to 1.5mm at most. Therefore, according to the working principle of the die, when cutting off, the cutter 10 moves downwards relative to the floating core rod and the feeding port, so that the height of the feeding port has little influence on parts, and the main function of the feeding port is a limiting function on the steel pipe. However, in order to prevent the steel pipe from shaking left and right on the plane during the feeding process, the length of the feeding body 5 should preferably be selected to be longer. Because the material feeding body 5 is also a part of the punching piece, the material of the material feeding body is die steel SKD11, and in appearance, impurities on the surface of the steel pipe can be accumulated in the material feeding port in the feeding process to generate clamping stagnation, so that a part of the material feeding body 5 is cut off to be communicated, and feeding is smoother.
Selection of floating and fixed mandrels
When the conditions allow, set up the core rod and carry on the die cutting, it is very favorable to controlling the collapse of the tube wall, deformation. The fixed core rod 7 is arranged on the upper die base 2 along with the fixed core mounting base 6, and the floating core rod 18 is fixed through an iron rod penetrating through the tail of the steel pipe, so that the front end of the floating core rod is tightly pressed on the end face of the fixed core rod 7 during cutting. To ensure smooth feeding, the floating mandrel 18 should be slightly larger in size than the fixed mandrel 7. The floating mandrel 18 should also be slightly smaller than the steel pipe, typically about 0.5mm smaller. Since the upper half of the fixed mandrel 7 does not produce a shearing action while taking into account the fixing of the discharge device, the upper part of the fixed mandrel 7 is cut by 1.5mm again at the time of design, and the other dimensions remain unchanged. Two semicircular grooves are required to be formed in the upper portion and the lower portion of the fixed core rod 7 respectively, the diameter of each semicircular groove is equal to that of the discharging rod 12, and the semicircular grooves can contain half portions of the discharging rods 12, so that half portions of the discharging rods 12 can be located in the semicircular grooves, and the bottom surfaces of the discharging rods 12 can be abutted to workpieces conveniently. In addition, because the high-frequency steel pipe has a welding seam, a corresponding groove needs to be formed on the core rod, and the blocking is avoided.
Selection of upper die cutters
The cutter 10 of the upper die carrier is embedded on a cutter mounting frame 9 and is fixed on the upper die base 2 along with the cutter mounting frame 9. The height of the cutter 10 should be greater than the height of the part leaving a mounting hole size in the cutter 10.
Selection of mounting base of feeding port
The feeding port mounting seat 4 is used for fixing the feeding body 5 and controlling the mounting position of the feeding body 5 on the lower die base 1, the parts are guided to leak from the discharge port of the lower die base 1 after the steel pipe is cut off, and meanwhile, the height of the feeding port is controlled, so that feeding is facilitated. It should be noted that the rear part of the base is made into an inward inclined plane, so that the parts can be smoothly pushed out and dropped without colliding with the feeding port mounting seat 4 after being cut. The base is welded on the lower die base 1, so that the base and the lower die base are integrated.
Selection of fixed core mounting seat and positioning block
A groove with the same size as the cross section of the fixed core rod 7 can be formed in the fixed core mounting seat 6, and the fixed core rod 7 is embedded into the groove by interference fit. In order to ensure the embedding distance and firmness during each installation, two corresponding threaded holes are respectively drilled in the fixed core rod 7 and the groove and are connected by using the hexagon socket head cap screw. The positioning block 8 is also fixed on the base by bolts and is abutted against the right lower part of the fixed core rod 7. The length of the positioning block 8 needs to be matched with the depth of the groove on the base, so that after the fixed core rod 7 is completely inserted into the groove, the length of the positioning block 8 subtracted from the residual length is just equal to the radial length of the punched part. Because the fixed core rod 7 is installed in the groove and is matched with the knife edge of the movable cutter 10 after being installed on the upper die base 2 along with the fixed core installation base 6, the height of the groove on the fixed core installation base 6 also needs to be determined according to specific requirements, the center of the fixed core rod 7 and the center of the feeding port are ensured to be at the same height after installation is completed, the cutter installation frame 9 is corresponding to the feeding port at the position of the upper die base 2, the position of the fixed core installation base 6 is corresponding to the position of the cutter installation frame 9, and the distance between the fixed core rod 7 and the cutter installation frame 9 is the distance between the fixed core rod and the cutter installation frame, which is the distance between the fixed.
Selection of discharge devices
When the steel pipe is completely cut off, the cut high-frequency welding rectangular pipe is sleeved on the fixed core rod 7 and then pushed out by four unloading rods 12 around the fixed core rod 7. The discharging rod 12 passes through a through opening (not shown in the figure) of the fixed core mounting seat 6 and is fixed together by two vertical plates 13 and a shaft 14, and a return spring is required to be assembled on the discharging rod 12 to return the discharging device to the original position after discharging. A certain length is left at both ends of the shaft 14 for installing the fixed guide plates 16, so that the accurate movement direction is ensured during discharging, and the discharging force is reduced. The middle section of the shaft 14 is a key for controlling the discharging time, a shaft sleeve 15 is arranged on the middle section of the shaft, and the shaft sleeve 15 needs to be matched with a stop block 11 on the lower die base 1 to control the forward pushing time of the discharging rod 12. The sleeve 15 must be allowed to touch the stop 11 after the steel pipe is completely punched, otherwise the discharge bar 12 is pushed out too early, the steel pipe collides with the die and is damaged, and the discharge bar 12 is also bent. The sleeve 15 must continue to move downwards a distance after it hits the stop 11 until the part is completely detached from the fixed mandrel 7. The contact surface of the stopper 11 and the sleeve 15 is made to be a slope surface, so that the reaction force of the stopper 11 on the sleeve 15 is perpendicular to the slope surface, that is, a horizontal component force exists, which is beneficial for the discharging rod 12 to push out the part. Meanwhile, the external dimension of the stop 11 should be larger than that of the shaft sleeve 15 so as to increase the collision area of the stop and the shaft sleeve and reduce the abrasion.
For the convenience of unloading, the whole axis of the unloading device is equal to the center of the fixed core rod 7 in height. The time of the discharge device action is adjusted by controlling the height of the movement on the stop 11.
Selection of die shank
The middle and small dies are generally fixed on the upper die base 2 on the slide block of the press through a die shank 17. Here a screw-in die shank 17 is used, the size of the die shank 17 being selected according to the size of the hole in the die shank 17 of the press selected.
It should be noted that the closing height of the stamping die is the distance between the outer planes of the upper and lower die holders when the stamping die is at the lowest working position. The overall closing height of the mould must be adapted to the closing height of the apparatus, otherwise proper installation and operation cannot be guaranteed.
Material and heat treatment of working part of stamping die
The selection of the material of the mould is a very important part of the whole mould manufacturing process. The die material selection needs to satisfy three principles: the die meets the requirements of abrasion resistance, toughness and the like, the die meets the process requirement, and the die meets the requirement of economic applicability.
Heat treatment of metallic materials generally does not change the shape and overall chemical composition of the material pair itself, but rather improves the inherent quality of the workpiece. In addition to the selection of suitable materials and the correct forming process, heat treatment is often indispensable to give the metal the required mechanical properties. The materials and heat treatment processes of the main parts of the cutting die are shown in the following table.
| Name of part | Material | Heat treatment and hardness HRC |
| Upper and lower die holders | 45 steel | Tempering |
| Die handle | Q235 | Tempering |
| Guide post | 20Cr | Carburizing and quenching 58-62 HRC |
| Fixed core mounting seat | 45 steel | Tempering |
| Floating and fixed core rod | SKD11 | Hardening at 58-62 HRC |
| Material feeding body | SKD11 | Hardening at 58-62 HRC |
| Cutting knife | SKD11 | Hardening at 58-62 HRC |
| Cutter mounting rack | 45 steel | Tempering |
| Feeding port mounting seat | 45 steel | Tempering |
| Fixed guide plate | Cr12 | Quenching at 52-56 HRC |
| Unloading rod and stop block | 45 steel | Quenching at 40-45 HRC |
| Locating block | 45 steel | Tempering |
Assembly of stamping die
Before assembly, the following procedures are required: cleaning inspection parts, and checking and cleaning the parts according to assembly requirements; and arranging a working site, preparing tools, clamps, measuring tools, materials and auxiliary equipment required during assembly, cleaning a working platform, and assembling the stamping die after the preparation is finished.
A. Firstly, mounting a lower die, mounting a feeding body on a feeding port mounting seat, and fixing the feeding body by using hexagon socket head cap screws, wherein the direction of the feeding port is required to be noticed during mounting, one end of the left surface is kept horizontal with a port of a base, and one end of the right surface slightly protrudes out of the feeding port mounting seat;
B. then, mounting an upper die, mounting a cutter mounting frame on the upper die base, and fixing a cutter on the cutter mounting frame;
C. installing the fixed core rod into the groove of the fixed core installation seat, and then installing the fixed core rod and the fixed core installation seat on the upper die seat;
D. the discharging rod of the discharging device is arranged in the fixed core mounting seat, and the fixed guide plate is arranged on the shaft, so that the shaft can move smoothly in the fixed guide plate;
E. the die handle is arranged on the upper die base, the whole upper die is combined on the lower die and placed on the working table of the press machine together, and the upper die base is arranged in the slide block of the press machine through the die handle.
The screws on each connection must be tightened without allowing any loosening. After the installation is ensured to be correct, the die can be tested, whether the abnormity such as interference exists in the whole movement process or not is observed, and under the condition that the die works normally, the part produced in a test mode is detected to see whether the standard is met or not. Timely adjustment is required if there is a problem.
Working process of stamping die
A. The workpiece is manually fed from a feeding port, sleeved on a fixed core rod and pushed by force to abut against a positioning block, and meanwhile, a floating core rod is connected by a slender iron rod penetrating through the tail part of the workpiece and plugged into the workpiece and is manually pushed to move along with the workpiece;
B. then starting a press machine, driving an upper die base to move downwards by the press machine, shearing and stretching the workpiece under the combined action of a material feeding body, a cutter, a fixed core rod and a floating core rod, and finally breaking the workpiece;
C. the cut workpiece is sleeved on the fixed core rod, the upper die base continues to move downwards again, when a shaft sleeve of the discharging device touches a stop block on the lower die base, the discharging rod is pushed to move forwards, and the discharging rod starts to touch the workpiece sleeved on the fixed core rod and eject out;
D. the workpiece falls from the opening of a charging chute at the bottom of the lower die base and the opening of a press workbench;
E. the press machine starts to move upwards after reaching the maximum stroke, the discharging rod returns to the initial position under the action of the elastic force of the return spring, and one working stroke is completed.
The above are merely examples of the present invention, and common general knowledge of known specific structures and characteristics in the schemes is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. A using method of a stamping die is specially used for stamping operation of high-frequency welding rectangular tubes, the stamping die comprises a lower die holder (1) and an upper die holder (2), the lower die holder (1) is connected with the upper die holder (2) through four guide pillars (3), the upper die holder (2) can slide towards the lower die holder (1) along the guide pillars (3), a blanking groove is arranged on the lower die holder (1), a feeding port mounting seat (4) is arranged on one side of the lower die holder (1), a feeding body (5) is arranged on the feeding port mounting seat (4), the feeding body (5) is provided with a feeding port, a fixed core mounting seat (6) is arranged on the lower surface of the upper die holder (2), a groove is arranged on the fixed core mounting seat (6), and a fixed core rod (7) is arranged in the groove, the lower part of the fixed core mounting seat (6) is also provided with a positioning block (8), the positioning block (8) is positioned under the fixed core rod (7), the fixed core mounting seat (6) is also provided with a through hole, the upper part and the lower part of the fixed core rod (7) are respectively provided with two semicircular grooves, the middle of the lower part of the fixed core rod (7) is also provided with a notch, the notch is used for matching with a welding seam of a high-frequency welding rectangular tube, the lower surface of the upper die base (2) is also provided with a cutter mounting frame (9), the cutter mounting frame (9) is provided with a cutter (10), the lower die base (1) is also provided with a stop block (11), the stamping die is also provided with an unloading device, the unloading device comprises an upper unloading component and a lower unloading component, each unloading component comprises two unloading rods (12), and the upper unloading component and the lower unloading component can penetrate through the through hole, each discharging rod (12) is further provided with a return spring, four discharging rods (12) can be correspondingly matched with four semicircular grooves respectively, the four discharging rods (12) are connected to two vertical plates (13), the two vertical plates (13) are oppositely arranged, a shaft (14) is connected between the two vertical plates (13), a shaft sleeve (15) is arranged in the middle of the shaft (14), two ends of the shaft (14) are provided with fixed guide plates (16), the shaft sleeve (15) is matched with the stop block (11) and used for controlling the forward pushing time of the discharging rods (12), a die handle (17) is further arranged on the upper die base (2), and the upper die base (2) is connected to a press sliding block through the die handle (17);
the stamping die is assembled by the following steps:
A. firstly, mounting a lower die, mounting a feeding body on a feeding port mounting seat, and fixing the feeding body by using hexagon socket head cap screws, wherein the direction of the feeding port is required to be noticed during mounting, one end of the left surface is kept horizontal with a port of a base, and one end of the right surface slightly protrudes out of the feeding port mounting seat;
B. then, mounting an upper die, mounting a cutter mounting frame on the upper die base, and fixing a cutter on the cutter mounting frame;
C. installing the fixed core rod into the groove of the fixed core installation seat, and then installing the fixed core rod and the fixed core installation seat on the upper die seat;
D. the discharging rod of the discharging device is arranged in the fixed core mounting seat, and the fixed guide plate is arranged on the shaft, so that the shaft can move smoothly in the fixed guide plate;
E. installing a die shank on an upper die base, then closing the whole upper die on a lower die, placing the die shanks on a worktable of a press machine together, and then installing the upper die base into a slide block of the press machine through the die shank;
a floating mandrel (18) is arranged in the high-frequency welding rectangular tube, the floating mandrel (18) can freely slide in the high-frequency welding rectangular tube, the floating mandrel (18) is fixed through an iron rod penetrating through the tail part of the high-frequency welding rectangular tube, the size of the floating mandrel (18) is slightly larger than that of the fixed mandrel (7), and the cutter (10) and the floating mandrel (18) arranged in the high-frequency welding rectangular tube form an upper cutting edge; the fixed mandrel (7) and the feeding port of the feeding body (5) form a lower cutting edge, when the high-frequency welding rectangular tube enters a limited position from the feeding port, the upper and lower auxiliary cutting edges are sheared simultaneously, and then the high-frequency welding rectangular tube is unloaded from the fixed mandrel (7) by the unloading device;
after the fixed core rod (7) is completely inserted into the groove, the length of the positioning block (8) subtracted from the residual length is just equal to the radial length of the punched high-frequency welding rectangular tube;
the center of the fixed core rod (7) and the center of the feeding port are at the same height, the position of the cutter mounting frame (9) on the upper die base (2) corresponds to the feeding port, the position of the fixed core mounting base (6) corresponds to the position of the cutter mounting frame (9), and the distance between the fixed core rod and the cutter mounting frame is the distance between the fixed core rod and the cutter mounting frame, namely the distance between the fixed core rod and the cutter mounting frame, which is obtained by subtracting the depth of the groove from the length of the fixed core rod (7), and the width of the cutter mounting frame (9);
the method is characterized in that the using steps of the stamping die are as follows:
A. feeding the high-frequency welding rectangular tube from a feeding port by a worker, sleeving the high-frequency welding rectangular tube on a fixed core rod, pushing the fixed core rod to abut against a positioning block by force, and simultaneously plugging a floating core rod into the high-frequency welding rectangular tube by connecting a slender iron rod penetrating through the tail part of the high-frequency welding rectangular tube, and manually pushing the floating core rod to move along with the high-frequency welding rectangular tube;
B. then starting a press machine, driving an upper die base to move downwards by the press machine, shearing and stretching the high-frequency welding rectangular pipe under the combined action of a material feeding body, a cutter, a fixed core rod and a floating core rod, and finally breaking the high-frequency welding rectangular pipe;
C. the cut high-frequency welding rectangular tube is sleeved on the fixed core rod, the upper die base continues to move downwards, when a shaft sleeve of the discharging device touches a stop block on the lower die base, the discharging rod is pushed to move forwards, and the discharging rod starts to touch the high-frequency welding rectangular tube sleeved on the fixed core rod and pushes out the high-frequency welding rectangular tube;
D. the high-frequency welding rectangular pipe falls down from the opening of a charging chute at the bottom of the lower die base and the workbench of the press machine;
E. the press machine starts to move upwards after reaching the maximum stroke, the discharging rod returns to the initial position under the action of the elastic force of the return spring, and one working stroke is completed.
2. The use method of the stamping die as claimed in claim 1, wherein the feed port mounting seat (4) has an inward inclined surface, and the feed port mounting seat (4) is welded on the lower die seat (1).
3. The use method of the stamping die as claimed in claim 1, wherein the groove of the fixed core mounting seat (6) and the fixed core rod (7) are respectively provided with two corresponding threaded holes and connected by an inner hexagonal bolt.
4. The use method of the stamping die as claimed in claim 1, wherein the contact surface of the stopper (11) and the sleeve (15) is a bevel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910658247.5A CN110355258B (en) | 2019-07-21 | 2019-07-21 | Application method of stamping die |
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| CN201910658247.5A CN110355258B (en) | 2019-07-21 | 2019-07-21 | Application method of stamping die |
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| CN114247933B (en) * | 2022-03-01 | 2022-05-10 | 常州巨旋机械制造有限公司 | Special shearing plate and shearing device for special-shaped metal plate and manufacturing process |
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| CN102166605B (en) * | 2011-01-11 | 2013-01-02 | 昆山荣辉精密冲压模架制造有限公司 | Reel core-pulling guide mechanism |
| KR101804541B1 (en) * | 2016-09-12 | 2017-12-04 | 김소현 | Apparatus for Punching the Support Flange for Concrete Pile Mold |
| CN206325994U (en) * | 2016-12-26 | 2017-07-14 | 惠州市联祥家具有限公司 | Metal pipe material fast ram open mold |
| CN206561059U (en) * | 2016-12-27 | 2017-10-17 | 南京思创精密模具有限公司 | A kind of punching die |
| CN207343554U (en) * | 2017-10-25 | 2018-05-11 | 成都工业学院 | A kind of stainless steel tube welds mouth of pipe stamping die |
| CN207952353U (en) * | 2018-03-07 | 2018-10-12 | 宿迁市乐邦电子科技有限公司 | A kind of pipe fitting punch die |
| CN209124675U (en) * | 2018-08-29 | 2019-07-19 | 合肥常青机械股份有限公司 | A kind of automobile pipe part automatic cutting device |
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