CN111604411A - Stainless steel precise small hole burr-free blanking die and forming method thereof - Google Patents
Stainless steel precise small hole burr-free blanking die and forming method thereof Download PDFInfo
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- CN111604411A CN111604411A CN202010478245.0A CN202010478245A CN111604411A CN 111604411 A CN111604411 A CN 111604411A CN 202010478245 A CN202010478245 A CN 202010478245A CN 111604411 A CN111604411 A CN 111604411A
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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
- B21D28/24—Perforating, i.e. punching holes
- B21D28/34—Perforating tools; Die holders
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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
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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
- B21D28/24—Perforating, i.e. punching holes
- B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
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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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
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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
- B21D37/08—Dies with different parts for several steps in a process
Abstract
The invention provides a stainless steel precise small-hole burr-free blanking die and relates to the technical field of stamping equipment. Wherein a stainless steel precision aperture does not have burr blanking die, upper padding plate and lower bolster and cope match-plate pattern and lower bolster that set up including the interval, the cope match-plate pattern includes fixed plate and the fly leaf that the interval set up, the fly leaf be close to the lower bolster and with fixed plate sliding connection, the fixed plate is fixed with one-level towards needle, second grade in advance towards needle, second grade towards needle, tertiary towards needle and side cut drift along the direction of feed of steel sheet in proper order towards one side of fly leaf, one-level towards needle, second grade in advance towards needle, second grade towards needle, tertiary towards needle and side cut drift run through the fly leaf and with fly leaf sliding connection, the lower bolster is provided with and one-level towards needle, second grade in advance towards needle, second grade towards needle, tertiary towards needle and side cut the corresponding first grade groove, second grade in advance groove, second grade groove, third grade groove, side cut groove of. The invention has the advantages of high production efficiency, high product precision and high economic benefit.
Description
Technical Field
The invention relates to the technical field of stamping equipment, in particular to a stainless steel precise small-hole burr-free blanking die and a forming method thereof.
Background
Fig. 7 is a structural diagram of a coffee machine disk, which includes eight circumferentially arranged primary holes, a secondary hole located at the center of the primary hole, and four tertiary holes located outside the secondary hole and distributed circumferentially. The small round piece of the coffee machine is used in the coffee machine and used for controlling the heating temperature of the coffee machine and the steam flow discharge, when the temperature reaches a certain value, the coffee machine starts to exhaust air through the small hole on the steel piece, and simultaneously, boiled water flows out to start to cook coffee. When the air is not exhausted timely, the temperature is too high, the boiler in the coffee machine can explode, and when the temperature is too low, the quality of coffee is affected, so the quality of small discs of the coffee machine is very important for the coffee machine.
Because the thickness of the steel sheet is very thin, the diameters of the secondary holes and the tertiary holes are only 1-3 mm, the requirement on punching equipment is higher, and the diameters of the secondary holes are only 0.250-0.300 mu m, so that the holes with the small diameters are difficult to punch by the existing punching equipment. Therefore, the steel sheet on the market at present adopts an etching process, and the etching process is difficult to control, so that the etched small holes have the problems of rough inner wall, non-circular inner hole, inner hole taper and the like, and meanwhile, the etched finished product rate is poor, the average hole forming rate is 30 percent, the production efficiency is low, the quality is difficult to improve, and the cost is difficult to reduce.
In view of the above, the inventor of the present application invented a stainless steel precision small hole burr-free blanking die and a forming method thereof.
Disclosure of Invention
The invention aims to provide a stainless steel precise small-hole burr-free blanking die, aiming at solving the problems of poor precision, difficult quality guarantee and high production cost of the traditional production mode; the invention aims to provide a production method of small wafers of a coffee machine, aiming at solving the problems of poor finished product rate, low production efficiency, difficulty in ensuring quality and high production cost in the traditional production mode.
In order to achieve the first purpose, the invention provides the following technical scheme:
the utility model provides a stainless steel precision aperture no burr blanking die, includes the upper padding plate and the lower bolster that the interval set up and be located upper die plate and lower bolster between upper padding plate and the lower bolster, the upper die plate includes fixed plate and the fly leaf that the interval set up, the fly leaf be close to the lower bolster and with fixed plate sliding connection, the fixed plate is fixed with one-level towards one side of fly leaf along the direction of feed of steel sheet in proper order and dashes needle, second grade and dash needle, tertiary towards needle and the side cut drift of dashing, needle, second grade are dashed in advance towards needle, second grade towards, tertiary towards needle and the side cut drift run through the fly leaf and with fly leaf sliding connection, the lower bolster is provided with and dashes needle, second grade and dash needle, second grade towards needle, tertiary towards needle and the first order groove, second grade pre-groove, second grade groove, third grade groove, the side cut groove that the side cut drift corresponds with.
Furthermore, the first-stage punching needles comprise four groups of unit needles, the single group of unit needles comprises two punching needles which are centrosymmetric, the four groups of unit needles are arranged at intervals along the feeding direction of the steel sheet, and eight punched first-stage holes are circumferentially and uniformly distributed.
Furthermore, a plurality of groups of guide needles are arranged on one side of the movable plate facing the lower template at intervals along the steel sheet feeding direction, each group of guide needles comprises two needle heads which are distributed in a central symmetry manner, and a plurality of groups of guide grooves corresponding to the guide needles are arranged on the lower template.
Furthermore, the lower die plate is internally and slidably connected with guide inserts corresponding to the guide pins one to one, and the guide grooves are positioned in the guide inserts.
Furthermore, a plurality of groups of positioning inserts for positioning are connected in the lower die plate in a sliding mode, each group of positioning inserts comprises two symmetrical embedded columns, and annular grooves for steel sheets to penetrate through are formed in the peripheral sides of the embedded columns.
Further, still including the subassembly that cuts off that is used for cutting off the good steel sheet of shaping, the subassembly that cuts off is including cutting off the drift, cutting off adjusting block, cylinder, cut off the drift and cut off the equal sliding connection of adjusting block and just both perpendicular settings in the cope match-plate pattern, the one end of cutting off the adjusting block orientation and cutting off the drift is provided with the wedge, the top and the wedge butt of cutting off the drift, it is fixed with the piston of cylinder to cut off the one end that the drift was kept away from to the adjusting block.
Furthermore, one side of the movable plate, which faces the fixed plate, is provided with a connecting groove, one side of the fixed plate, which faces the movable plate, is provided with a sliding rod in sliding connection with the connecting groove, and a buffer spring is arranged in the connecting groove.
Further, four corners of lower bolster are provided with the one-level guide post, four corners of upper padding plate are provided with four second grade guide posts, in the top sliding connection second grade guide post of one-level guide post, lantern ring and compression spring are established to week side cover of one-level guide post, the lantern ring is close to the upper padding plate, compression spring is located between the bottom of the lantern ring and one-level guide post.
In order to achieve the second purpose, the invention provides the following technical scheme:
a method of forming comprising the steps of:
s1, mounting the blanking die on a punching machine, and mounting the steel sheet at the feeding end of the punching machine;
s2, starting a punch press, feeding the steel sheet between an upper template and a lower template, and controlling the upper template to press downwards by the punch press so as to punch and cut edges of the steel sheet to obtain the steel sheet;
s3, cutting the steel sheet with punched holes to obtain steel bars with a plurality of coffee machine small discs when the steel sheet moves to the discharge end of the die;
s4, carrying out acid washing deburring on the steel strip with the plurality of coffee machine small discs, and then drying and boxing to finish the whole production process of the coffee machine small discs.
Further, the specific process of punching and trimming in S2 is as follows:
(1) after the steel sheet enters between the upper template and the lower template, punching holes on two sides of the steel sheet by a guide pin to obtain a guide groove;
(2) the steel sheet continues to move forwards, when the steel sheet reaches the position of the primary needle head, the pilot needle penetrates through the pilot groove to position the steel sheet, and the primary needle head punches the steel sheet to obtain a primary hole;
(3) the steel sheet punched with the primary hole moves forwards, when the steel sheet reaches the position of the secondary pre-punching needle head, the pilot needle penetrates through the pilot groove to position the steel sheet, and the secondary pre-punching needle head destroys the steel sheet to obtain the profile of the secondary hole;
(4) the steel sheet continues to move forwards, when the steel sheet reaches the position of the secondary needle head, the pilot needle penetrates through the pilot groove to position the steel sheet, and the secondary pre-punching needle head breaks the profile obtained in the step (3) to obtain a secondary hole;
(5) the steel sheet punched with the secondary hole continues to move forwards, when the steel sheet reaches the position of the tertiary needle head, the guide needle penetrates through the guide groove to position the steel sheet, and the tertiary needle head penetrates through the steel sheet to obtain a tertiary hole;
(6) and the steel sheet punched with the three-level holes continues to move forwards, when the steel sheet reaches the position below the trimming punch, the guiding needle penetrates through the guiding groove to position the steel sheet, the trimming punch trims the steel sheet, and the outline of the small wafer is cut out to obtain the small wafer.
Compared with the prior art, the invention has the beneficial effects that:
(1) by arranging the production die, the traditional etching production process is directly converted into a mechanical punching process, so that the production difficulty is reduced, the hole forming rate of the product is improved, the production efficiency of the product is improved, and the economic benefit is also improved;
(2) the steel sheet is positioned during production by arranging the guide pin, the positioning insert and the guide insert, so that the steel sheet is prevented from deviating during punching, the punching precision is improved, and the product quality is ensured;
(3) the buffering spring is arranged, so that the needle head is buffered during punching, burrs during punching are reduced, and the quality of a product is ensured;
(4) for the secondary hole, a method of pre-punching and then fine-punching is adopted, so that the punching difficulty of the secondary hole is reduced, and the precision of the secondary hole is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of an upper die plate;
FIG. 3 is a schematic view showing a structure of a fixing plate;
FIG. 4 is a schematic structural view of the lower template;
FIG. 5 is a schematic view highlighting the construction of the severing assembly;
FIG. 6 is a view showing a state of change of a steel sheet in a punching process;
figure 7 is a view of the structure of a coffee maker wafer.
Description of the main elements
1. An upper base plate; 2. a lower base plate; 3. mounting a template; 31. a fixing plate; 32. a movable plate; 4. a lower template; 5. cutting off the assembly; 51. cutting off the punch; 52. cutting off the adjusting block; 53. a cylinder; 54. a return spring; 6. a primary guide post; 7. a secondary guide post; 8. a chute; 9. a collar; 10. a compression spring; 11. a slide bar; 12. a first-stage punching needle; 13. a secondary pre-punching needle; 14. secondary needle punching; 15. three-stage punching; 16. trimming punches; 17. a primary tank; 18. secondary pre-grooving; 19. a secondary tank; 20. a third-stage groove; 21. cutting an edge groove; 22. positioning the insert; 23. a ring groove; 24. a card slot; 25. a guide needle; 26. a guiding insert; 27. a guide groove; 28. cutting off the groove; 29. a primary pore; 30. a secondary pore; 31. a tertiary hole; 32. and (4) aligning holes.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1 and 2, the stainless steel fine-hole burr-free blanking die comprises an upper backing plate 1 and a lower backing plate 2 which are arranged at intervals, an upper die plate 3 and a lower die plate 4 which are arranged between the upper backing plate 1 and the lower backing plate 2, and a cutting assembly 5 for cutting off a formed steel sheet. Be provided with one-level guide post 6 in four corners of lower bolster 2, be provided with four second grade guide posts 7 in four corners of upper bolster 1, seted up spout 8 in the second grade guide post 7, the top sliding connection of one-level guide post 6 is in spout 8. The lantern ring 9 and the compression spring 10 are sleeved on the periphery of the first-level guide post 6, the lantern ring 9 is close to the upper backing plate 1, and the compression spring 10 is located between the lantern ring 9 and the bottom end of the first-level guide post 6. When cope match-plate pattern 3 and lower bolster 4 pressfitting, cope match-plate pattern 3 along the direction of one-level guide post 6 with the pressfitting of lower bolster 4, the precision that the position off tracking never influenced the punching a hole when preventing cope match-plate pattern 3 from pushing down. The compression spring 10 is compressed by the lantern ring 9 in the pressing process, and after the upper template 3 and the lower template 4 are pressed, the upper template 3 can be quickly reset by means of the elastic force of the compression spring 10, so that the power required by resetting the upper template 3 is reduced.
As shown in fig. 2, 3 and 4, the upper plate 3 includes a fixed plate 31 and a movable plate 32 disposed at an interval, and the movable plate 32 is adjacent to the lower plate 4 and slidably connected to the fixed plate 31. A connecting groove (not shown) is provided at a side of the fixed plate 31 facing the movable plate 32, a sliding rod 11 slidably connected to the connecting groove is provided at a side of the fixed plate 31 facing the movable plate 32, and a buffer spring (not shown) is provided in the connecting groove and located between the sliding rod 11 and a groove bottom of the connecting groove. When the movable plate 32 is limited by the lower template 4 to stop moving and the fixed plate 31 continues to be pressed downwards, the buffer spring provides a certain resistance to play a role in buffering, and the punching precision is improved.
A first-stage punching needle 12, a second-stage pre-punching needle 13, a second-stage punching needle 14, a third-stage punching needle 15 and a trimming punch 16 are sequentially fixed on one side of the fixed plate 31 facing the movable plate 32 along the feeding direction of the steel sheet, and the first-stage punching needle 12, the second-stage pre-punching needle 13, the second-stage punching needle 14, the third-stage punching needle 15 and the trimming punch 16 penetrate through the movable plate 32 and are connected with the movable plate 32 in a sliding mode. In the state of opening the die, the needle heads of the primary punching needle 12, the secondary pre-punching needle 13, the secondary punching needle 14, the tertiary punching needle 15 and the trimming punch 16 are flush with the lower surface of the sliding plate. The lower die plate 4 is provided with a first-stage groove 17, a second-stage pre-groove 18, a second-stage groove 19, a third-stage groove 20 and a trimming groove 21 which correspond to the first-stage punching needle 12, the second-stage pre-punching needle 13, the second-stage punching needle 14, the third-stage punching needle 15 and the trimming punch 16.
When punching, the punch presses the upper template 3 to press downwards, when the movable plate 32 touches the lower template 4, the movement is limited and stopped by the lower template 4, the fixed plate 31 continues to press downwards, and the first-stage punching needle 12, the second-stage pre-punching needle 13, the second-stage punching needle 14, the third-stage punching needle 15 and the trimming punch 16 on the fixed plate 31 continue to press downwards, so that the steel sheet passes through, and the purpose of punching is achieved. In the process, the heads of the first-stage punching needle 12, the second-stage pre-punching needle 13, the second-stage punching needle 14, the third-stage punching needle 15 and the trimming punch 16 are in contact with the steel sheet in advance, and after the steel sheet is fixed through the movable plate 32 and the lower template 4, the first-stage punching needle 12, the second-stage pre-punching needle 13, the second-stage punching needle 14, the third-stage punching needle 15 and the trimming punch 16 penetrate out of the movable plate 32 to punch the steel sheet, so that the position of the steel sheet cannot deviate during punching, and the punching precision is improved.
The first-stage punching needles 12 comprise four groups of unit needles arranged at intervals along the feeding direction of the steel sheet, the single group of unit needles comprises two punching needles which are centrosymmetric, and eight first-stage holes punched by the four groups of unit needles are circumferentially and uniformly distributed. Because the distance between the eight first-level holes is very small, the requirement on equipment for punching the eight first-level holes is extremely high, the first-level punching needles 12 are divided into four groups and the positions of the four groups are staggered, and the two first-level holes which are centrosymmetric are punched at each time, so that the punching difficulty is reduced, and the punching efficiency is ensured to the maximum extent.
As shown in fig. 3 and 4, a plurality of positioning inserts 22 for fixing the steel sheets are slidably connected in the lower mold plate 4, each positioning insert 22 includes two centrally symmetric embedded columns, and a circular groove 23 for the steel sheet to pass through is formed on the peripheral side of each embedded column. In the mold clamping state, the portion of the positioning insert 22 located below the ring groove 23 is pressed into the lower platen 4, and a spring (not shown) for returning the positioning insert 22 is provided in the lower platen 4. The side of the fixing plate 31 facing the lower template 4 is provided with a clamping groove 24 for clamping the part of the positioning insert 22 above the ring groove 23. When the steel sheet enters between the upper template 3 and the lower template 4, the steel sheet passes through the ring groove 23, so that the steel sheet is positioned, the steel sheet is prevented from shifting in the moving process, and the punching precision is improved. During the process of die assembly, under the pressure of the upper die plate 3, the positioning insert 22 is pressed into the lower die plate 4, and the steel sheet is pressed between the upper die plate 3 and the lower die plate 4 in the process, so that the positioning insert 22 always positions the steel sheet, the steel sheet is prevented from being deviated, and the punching precision is ensured.
As shown in fig. 4, a plurality of groups of pilot needles 25 are fixed on one side of the movable plate 32 facing the lower die plate 4, the plurality of groups of pilot needles 25 are arranged at intervals along the steel sheet feeding direction, and each group of pilot needles 25 comprises two needle heads which are distributed centrosymmetrically. The lower template 4 is internally and slidably connected with guide inserts 26 which correspond to the guide needles 25 one to one, and the tops of the guide inserts 26 are flush with the lower edge line of the ring groove 23 in the state of opening the mold; in the mold-closing state, the guide insert 26 is pressed into the lower platen 4, and a spring (not shown) for returning the guide insert 26 is provided in the lower platen 4. A guide groove 27 corresponding to the guide pin 25 is formed at one end of the guide insert 26 facing the movable plate 32.
In the die closing process, the guide needle 25 contacts the steel sheet in advance along with the movable plate 32 and penetrates through the steel sheet to position the steel sheet, and then the first-stage punching needle 12, the second-stage pre-punching needle 13, the second-stage punching needle 14, the third-stage punching needle 15 and the trimming punch 16 punch the steel sheet, so that the position of the steel sheet cannot deviate in the punching process, the punching precision is further improved, and the product quality is improved. Meanwhile, when the guide nail contacts the steel sheet, the guide insert 26 provides a certain supporting force for the steel sheet, so that the buffering effect is achieved, and the positioning precision of the guide nail is improved.
As shown in fig. 4 and 5, the cutting assembly 5 includes a cutting punch 51, a cutting adjusting block 52, an air cylinder 53 and a return spring 54, the air cylinder 53 is fixed at the steel sheet discharging end of the upper backing plate 1, the cutting adjusting block 52 horizontally slides in the fixed plate 31, one end of the cutting adjusting block facing the air cylinder 53 is fixed with a piston rod of the air cylinder 53, the cutting punch 51 is vertically connected in the fixed plate 31 and the movable plate 32 in a sliding manner, a tool bit of the cutting punch is located in the movable plate 32 in the mold opening state, one end of the cutting adjusting block 52 facing the cutting punch 51 is provided with a wedge surface, and the top of the cutting punch 51 is abutted against the. A cutting groove 28 corresponding to the cutting punch 51 is formed in the upper surface of the lower die plate 4. When the steel sheet needs to be cut, the air cylinder 53 is started, the air cylinder 53 pushes the cutting adjusting block 52 to push forwards, and the cutting punch 51 moves towards the direction close to the lower die under the extrusion of the wedge-shaped surface, so that the steel sheet penetrates through the steel sheet and is cut.
The cross section of one end of the cutting punch 51 facing the fixed plate 31 is larger than that of the cutter head, two return springs 54 are respectively arranged on two sides of the lower half part of the cutting punch 51 in the movable plate 32, when the cutting punch 51 cuts downwards, the return springs 54 are compressed between the corners of the cutting punch 51 and the movable plate 32, and when the cutting adjusting block 52 retracts downwards under the driving of the air cylinder 53, the cutting punch 51 is restored to the original position under the elastic force of the return springs 54.
A method of forming comprising the steps of:
and S1, mounting the blanking die on a punching machine, and mounting the steel sheet at the feeding end of the punching machine.
And S2, starting a punch press, feeding the steel sheet between the upper template 3 and the lower template 4 through a feeding machine on the punch press, and controlling the upper template 3 to be pressed downwards with the lower template 4 by the punch press so as to punch the steel sheet and cut edges to obtain the coffee machine small wafer.
The specific process is shown in fig. 6, the steel sheet moves along the direction of an arrow in the drawing, wherein a is a pilot hole punching process, b is a first-level hole punching process, c is a second-level hole punching pre-punching process, d is a second-level hole punching process, e is a third-level hole punching process, and f is an edge cutting process, and the specific operation is as follows:
(a) after the steel sheet enters between the upper template 3 and the lower template 4, the guide pins 25 punch holes on two sides of the steel sheet to obtain guide holes;
(b) the steel sheet with the punched pilot hole continues to move forwards, when the steel sheet reaches the position of the first-stage needle head, the pilot needle 25 penetrates through the pilot groove 27 to position the steel sheet, and the four groups of first-stage needle heads respectively punch the steel sheet to obtain eight first-stage holes;
(c) the steel sheet punched with the primary hole continues to move forward, when the steel sheet reaches the position of the head 13 of the secondary pre-punching needle, the guide needle 25 penetrates through the guide groove 27 to position the steel sheet, and the head 13 of the secondary pre-punching needle destroys the steel sheet to obtain the profile of the secondary hole;
(d) the steel sheet continues to move forwards, when the position of the secondary needle head is reached, the pilot needle 25 penetrates through the pilot groove 27 to position the steel sheet, and the secondary pre-punching needle 13 punches the profile obtained in the step (3) to obtain a secondary hole (the diameter of the secondary hole is 0.267 +/-0.006 mu m);
(e) the steel sheet punched with the secondary hole moves forwards continuously, when the position of the tertiary needle head is reached, the guiding needle 25 penetrates through the guiding groove 27 to position the steel sheet, and the tertiary needle head penetrates through the steel sheet to obtain a tertiary hole;
(f) and the steel sheet punched with the three-level holes continues to move forwards, when the steel sheet reaches the position below the trimming punch 16, the guiding needle 25 penetrates through the guiding groove 27 to position the steel sheet, the trimming punch 16 trims the steel sheet, and the outline of the small wafer is cut out to obtain the small wafer.
S3, when the steel sheet moves to the discharging end of the die, the cylinder 53 drives the cutting punch 51 to cut the punched steel sheet (as shown by d in figure 6) at regular time, and the steel sheet with a plurality of coffee machine small discs is obtained;
s4, carrying out acid pickling deburring on the steel sheet with a plurality of coffee machine small discs, and then drying and boxing to finish the whole production process of the small discs.
The invention has the following beneficial effects:
1. through setting up the production mould, directly trun into traditional etching production technology into mechanical punching process, reduced the production degree of difficulty, improved the pore-forming rate of product, improved the production efficiency of product, also improved economic benefits simultaneously.
2. Through the arrangement of the guide needle 25, the positioning insert 22 and the guide insert 26, the steel sheet is positioned during production, deviation of the steel sheet during punching is prevented, punching accuracy is improved, and product quality is ensured. Meanwhile, the first-stage guide post 6 and the second-stage guide post 7 are matched to play a role in guiding in the die assembling process, so that the position deviation of the upper die plate 3 is avoided, and the punching precision is further improved.
3. For the first-level hole, a mode of symmetrically punching a plurality of groups of first-level needles is adopted, so that the punching difficulty is reduced, and for the second-level hole, a method of pre-punching and then fine punching is adopted, so that the punching difficulty of the second-level hole is further reduced, and the precision of the first-level hole and the precision of the second-level hole are ensured.
4. The movable plate 32 and the fixed plate 31 are arranged at intervals, so that in the punching process, the heads of the first-stage punching needle 12, the second-stage pre-punching needle 13, the second-stage punching needle 14, the third-stage punching needle 15 and the trimming punch 16 are in contact with the steel sheet in advance, after the steel sheet is fixed through the movable plate 32 and the lower template 4, the first-stage punching needle 12, the second-stage pre-punching needle 13, the second-stage punching needle 14, the third-stage punching needle 15 and the trimming punch 16 penetrate out of the movable plate 32 again to punch the steel sheet, the position of the steel sheet cannot deviate in the punching process, and the punching precision is improved.
5. Through setting up buffer spring, cushion the syringe needle when punching a hole, burr when reducing to punch a hole ensures the quality of product.
6. The diameter of the secondary hole which can be punched by the die is between 0.267 +/-0.06 mu m, the error is extremely small, and the precision is high.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The stainless steel precise pore burr-free blanking die is characterized by comprising an upper backing plate (1) and a lower backing plate (2) which are arranged at intervals, and an upper die plate (3) and a lower die plate (4) which are arranged between the upper backing plate (1) and the lower backing plate (2), wherein the upper die plate (3) comprises a fixed plate (31) and a movable plate (32) which are arranged at intervals, the movable plate (32) is close to the lower die plate (4) and is in sliding connection with the fixed plate (31), one side of the fixed plate (31) facing the movable plate (32) is sequentially fixed with a first-level punching needle (12), a second-level pre-punching needle (13), a second-level punching needle (14), a third-level punching needle (15) and a trimming punch (16) along the feeding direction of a steel sheet, the first-level punching needle (12), the second-level pre-punching needle (13), the second-level punching needle (14), the third-level punching needle (15) and the trimming punch (16) penetrate, the lower template (4) is provided with a primary groove (17), a secondary pre-groove (18), a secondary groove (19), a tertiary groove (20) and a trimming groove (21) which correspond to the primary punching needle (12), the secondary pre-punching needle (13), the secondary punching needle (14), the tertiary punching needle (15) and the trimming punch (16).
2. The stainless steel precise small hole burr-free blanking die as claimed in claim 1, wherein said primary punching pins (12) comprise four groups of unit pins, and a single group of said unit pins comprises two punching pins with central symmetry, said four groups of said unit pins are arranged at intervals along the feeding direction of the steel sheet, and eight primary holes are punched and uniformly distributed circumferentially.
3. The stainless steel precise small hole burr-free blanking die as claimed in claim 1, wherein a plurality of groups of pilot needles (25) are arranged at intervals on one side of the movable plate (32) facing the lower die plate (4) along the steel sheet feeding direction, each group of pilot needles (25) comprises two needle heads which are distributed in a central symmetry manner, and a plurality of groups of pilot grooves (27) corresponding to the pilot needles (25) are arranged on the lower die plate (4).
4. The stainless steel precise small hole burr-free blanking die as claimed in claim 3, wherein a pilot insert (26) corresponding to the pilot pins (25) in a one-to-one manner is slidably connected in the lower die plate (4), and the pilot groove (27) is located in the pilot insert (26).
5. The stainless steel precise small hole burr-free blanking die as claimed in claim 1, wherein a plurality of sets of positioning inserts (22) for positioning are slidably connected in the lower die plate (4), each set of positioning inserts (22) comprises two symmetrical embedded columns, and a circular groove (23) for a steel sheet to pass through is formed in the peripheral side of each embedded column.
6. The stainless steel fine small hole burr-free blanking die is characterized by further comprising a cutting assembly (5) for cutting off a formed steel sheet, wherein the cutting assembly (5) comprises a cutting punch (51), a cutting adjusting block (52) and a cylinder (53), the cutting punch (51) and the cutting adjusting block (52) are connected in the upper die plate (3) in a sliding mode and are arranged vertically, a wedge-shaped surface is arranged at one end, facing the cutting punch (51), of the cutting adjusting block (52), the top of the cutting punch (51) abuts against the wedge-shaped surface, and one end, far away from the cutting punch (51), of the cutting adjusting block (52) is fixed with a piston of the cylinder (53).
7. A stainless steel fine small hole burr-free blanking die according to claim 1, further characterized in that a side of the movable plate (32) facing the fixed plate (31) is provided with a connecting groove, a side of the fixed plate (31) facing the movable plate (32) is provided with a sliding rod (11) slidably connected with the connecting groove, and a buffer spring is arranged in the connecting groove.
8. The stainless steel fine small hole burr-free blanking die as claimed in claim 1, wherein four corners of said lower base plate (2) are provided with primary guide posts (6), four corners of said upper base plate (1) are provided with four secondary guide posts (7), the top ends of said primary guide posts (6) are slidably connected into said secondary guide posts (7), said primary guide posts (6) are sleeved with a collar (9) and a compression spring (10), said collar (9) is close to said upper base plate (1), said compression spring (10) is located between the collar (9) and the bottom ends of said primary guide posts (6).
9. A method of forming, comprising the steps of:
s1, mounting the blanking die on a punching machine, and mounting the steel sheet at the feeding end of the punching machine;
s2, starting a punch press, feeding the steel sheet between an upper template (3) and a lower template (4), and controlling the upper template (3) to be pressed downwards by the punch press so as to punch and cut edges of the steel sheet to obtain the steel sheet;
s3, cutting the steel sheet with punched holes to obtain steel bars with a plurality of coffee machine small discs when the steel sheet moves to the discharge end of the die;
s4, carrying out acid washing deburring on the steel strip with the plurality of coffee machine small discs, and then drying and boxing to finish the whole production process of the coffee machine small discs.
10. The production method of a steel sheet according to claim 9, wherein the punching and trimming in S2 are performed by the following steps:
(a) after the steel sheet enters between the upper template (3) and the lower template (4), punching the two sides of the steel sheet by a guide needle (25) to obtain a guide groove (27);
(b) the steel sheet continues to move forwards, when the steel sheet reaches the position of the primary needle head, the guiding needle (25) penetrates through the guiding groove (27) to position the steel sheet, and the primary needle head punches the steel sheet to obtain a primary hole;
(c) the steel sheet punched with the primary hole moves forward, when the steel sheet reaches the head of the secondary pre-punching needle (13), the guide needle (25) penetrates through the guide groove (27) to position the steel sheet, and the head of the secondary pre-punching needle (13) destroys the steel sheet to obtain the profile of the secondary hole;
(d) the steel sheet continues to move forwards, when the steel sheet reaches the position of the secondary needle head, the guide needle (25) penetrates through the guide groove (27) to position the steel sheet, and the head of the secondary pre-punching needle (13) punches the profile obtained in the step (3) to obtain a secondary hole;
(e) the steel sheet punched with the secondary hole moves forwards continuously, when the position of the tertiary needle head is reached, a guide needle (25) penetrates through a guide groove (27) to position the steel sheet, and the tertiary needle head penetrates through the steel sheet to obtain a tertiary hole;
(f) and the steel sheet punched with the three-level holes continues to move forwards, when the steel sheet reaches the position below the trimming punch head (16), the guiding needle (25) penetrates through the guiding groove (27) to position the steel sheet, the trimming punch head (16) trims the steel sheet, and the outline of the small wafer is cut out to obtain the small wafer.
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| CN202010478245.0A CN111604411A (en) | 2020-05-29 | 2020-05-29 | Stainless steel precise small hole burr-free blanking die and forming method thereof |
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| CN202010478245.0A CN111604411A (en) | 2020-05-29 | 2020-05-29 | Stainless steel precise small hole burr-free blanking die and forming method thereof |
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Application publication date: 20200901 |