CN110947841A - Dual-purpose mechanism for guiding and protecting strip material from error delivery - Google Patents

Dual-purpose mechanism for guiding and protecting strip material from error delivery Download PDF

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Publication number
CN110947841A
CN110947841A CN201911292103.9A CN201911292103A CN110947841A CN 110947841 A CN110947841 A CN 110947841A CN 201911292103 A CN201911292103 A CN 201911292103A CN 110947841 A CN110947841 A CN 110947841A
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Prior art keywords
misdelivery
pin
plate
discharging plate
positioning sleeve
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CN201911292103.9A
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CN110947841B (en
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宋红杰
陈毅
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Ningbo Hongda Motor Die Co ltd
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Ningbo Hongda Motor Die Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/08Dies with different parts for several steps in a process
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/10Die sets; Pillar guides
    • B21D37/12Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/003Positioning devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D55/00Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
  • Extrusion Of Metal (AREA)

Abstract

The strip material guiding and mis-feeding protection dual-purpose mechanism comprises an upper base plate, a male die fixing plate, a discharging plate and a strip material guiding and mis-feeding protection mechanism, wherein the bottom surface of an upper die base is connected with the upper base plate; a flange plug screw, a rectangular spring, an adjusting rod and a misdelivery pin adjusting rod are sequentially arranged in a vertical through hole penetrating through the upper die base and the upper backing plate, the lower end of the misdelivery pin adjusting rod is connected with a misdelivery pin, and the misdelivery pin penetrates through the male die fixing plate, the discharging plate base and the discharging plate; the arc-shaped head of the detection rod is arranged in the arc-shaped groove on the surface of the misdelivery pin adjusting rod, and the detection rod is connected with a misdelivery microswitch; the head of the misdelivery pin protrudes out of the bottom surface of the stripper plate; the size of a gap between the misdelivery pin and the guide hole of the strip material is set to be equal to that of the gap between the guide pin and the guide hole of the strip material; the inner walls of the through holes, through which the discharging plate seat and the discharging plate are penetrated by the misdelivery pins, are connected with a positioning sleeve, the inner wall of the positioning sleeve is provided with an O-shaped sealing ring, and the positioning sleeve clamps the misdelivery pins through the O-shaped sealing ring.

Description

Dual-purpose mechanism for guiding and protecting strip material from error delivery
Technical Field
The invention relates to a bar material guiding and mis-feeding protection mechanism of a multi-station progressive die.
Background
The multi-station progressive die is formed by combining a plurality of stations, and the position precision among the stations needs to be ensured by a guide pin positioning strip. In the high-speed blanking process (more than or equal to 300 times/minute), how to avoid the strip misdelivery caused by the strip delivery failure of the feeder, the misdelivery pin is needed to quickly and sensitively trigger the misdelivery microswitch to stop the machine tool to ensure. The design positions of the guide pins are generally on two sides of the strip, the gap between the guide pins and guide holes in the strip is generally controlled within 0.02mm, the position of a detection hole of the misdelivery pin is generally selected from one guide hole of an unimportant station on the strip, and the gap between the misdelivery pin and the guide holes in the strip is generally far larger than the gap between the guide pins and the guide holes and is generally 0.07-0.08 mm. Therefore, when the number of pilot holes of the web is small, the influence of the misfeed pin on the positional accuracy is large.
If the gap between the misdelivery pin and the pilot hole in the strip is controlled within 0.02mm, due to the burr of the strip (the two sides of the burr in the conventional pilot hole are 0.08mm), when the misdelivery pin is guided into the strip pilot hole, friction force can cause the misdelivery pin, the misdelivery adjusting rod and the detecting rod to retract, and the misdelivery microswitch is triggered to stop the machine tool, which is commonly called 'false misdelivery', and because the feeder and the die are normal, the gap between the misdelivery pin and the pilot hole in the strip is required to be controlled between 0.07mm and 0.08mm, so that the 'false misdelivery' phenomenon can be well avoided.
In the traditional high-speed blanking process, the normal structure and clearance precision (the clearance tolerance of each station pilot pin is controlled within 0.02 mm) of the pilot pin and the misdelivery pin can ensure that the multi-station progressive die can be normally produced. With the demands of higher performance requirements (such as noise, service life and the like) on household appliances, automobiles and the like, the high standards and high requirements (for example, the concentricity of the iron core of the motor of the original air-conditioning compressor is generally required to be within 0.08mm, even if the concentricity meets the requirements, but the product concentricity of the motor is required to be within 0.03mm in order to reduce the noise generated by the motor, the size requirement of non-important stations becomes important, the tolerance requirement is provided for process holes and the like), finally, higher requirements are provided for single parts and assemblies of the die (for example, the relative position between each station is required to be within 0.01mm, the size tolerance of the single part is controlled to be within 0.005 mm), and higher requirements are provided for multi-station pair progressive die maintenance (for example, a guide pin and a misdelivery pin cannot fall naturally during multi-station progressive die maintenance, because the concentricity and roundness of the dropped parts cannot be guaranteed to be within 0.005mm of tolerance), the gap between the misdelivery pin and the guide hole of the existing guide pin and misdelivery pin structure cannot meet the requirement of producing products meeting high requirements by the multi-station progressive die, and the structural form of the guide pin and the misdelivery hole cannot meet the maintenance requirement.
When the pin is mistakenly fed in the guide mechanism of the existing multi-station progressive die, the position precision and the blanking size of the current station cannot be stably controlled due to the false misfeeding prevention and the overlarge gap between the mistakenly fed pin and the bar guide hole, and finally the high requirement of a product cannot be ensured; when the structure of the pin is not delivered by mistake, the multi-station progressive die cannot take protective measures when the strip is delivered by mistake, so that the die is broken; when the maintenance, because lead positive round pin and drop and influence part size precision, lead to the mould to lead positive offset, influence the production of product.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a strip material guiding and mis-feeding protection dual-purpose mechanism, which can not only meet the requirement of a multi-station progressive die on accurate strip material positioning, but also provide mis-feeding protection and solve the problem of ensuring that a guiding pin does not fall off during maintenance.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the dual-purpose mechanism for strip material guiding and mis-delivery protection comprises an upper die base 1 and a discharge plate base 2, wherein the bottom surface of the upper die base 1 is connected with an upper base plate 12, the bottom surface of the upper base plate 12 is connected with a male die fixing plate 13, the upper base plate 12 and the male die fixing plate 13 extend into a groove in the top surface of the discharge plate base 2, the bottom surface of the discharge plate base 2 is connected with a discharge plate 3, and the discharge plate 3 is tightly attached to a strip material 4; a flange plug screw 14, a rectangular spring 15, an adjusting rod 7 and a misdelivery pin adjusting rod 8 are sequentially arranged in a vertical through hole penetrating through the upper die holder 1 and the upper backing plate 12, the lower end of the misdelivery pin adjusting rod 8 is connected with a misdelivery pin 16, and the misdelivery pin 16 penetrates through the punch fixing plate 13, the discharging plate seat 2 and the discharging plate 3; the detection rod 9 is horizontally arranged at the bottom of the upper die holder 1 through the mis-feeding detection fixing block 10, the arc-shaped head of the detection rod 9 is arranged in the arc-shaped groove on the surface of the mis-feeding pin adjusting rod 8, and the detection rod 9 is connected with the mis-feeding microswitch 11; the head of the misfeed pin 16 protrudes above the bottom surface of the stripper plate 3; the method is characterized in that:
the size of the gap between the misdelivery pin 16 and the pilot hole of the strip 4 is set to be equal to the size of the gap between the pilot pin and the pilot hole of the strip 4; the inner walls of through holes, through which the misdelivery pins 16 penetrate, of the discharging plate seat 2 and the discharging plate 3 are connected with a positioning sleeve 18, an O-shaped sealing ring 19 is arranged on the inner wall of the positioning sleeve 18, and the misdelivery pins 16 are clamped by the positioning sleeve 18 through the O-shaped sealing ring 19.
Preferably, the dimensional tolerance of the individual parts is controlled to be within 0.005mm and the clearance of the misdelivery pin 16 from the pilot hole of the strip 4 is controlled to be within 0.02 mm.
Preferably, the head of the misfeed pin 16 protrudes 0.5mm above the bottom surface of the stripper plate 3.
Preferably, the head of the positioning sleeve 18 is flush with the discharging plate 3, the tail of the positioning sleeve 18 is hung on the discharging plate seat 2 through a ring of flanges, and the middle part of the misdelivery pin 16 is in interference fit with the inner wall of the discharging plate seat 2.
Preferably, the misdelivery pin 16 is sleeved with a misdelivery pin adjusting sleeve 17, and the tail of the positioning sleeve 18 abuts against the shaft shoulder of the misdelivery pin 16 through the misdelivery pin adjusting sleeve 17.
The head of the misdelivery pin is additionally provided with a positioning sleeve, the head of the positioning sleeve is flush with the stripper plate, the tail of the positioning sleeve is hung on the stripper plate seat, the middle part of the positioning sleeve is in interference fit with the stripper plate seat, the upper end of the positioning sleeve is provided with an O-shaped sealing ring, the misdelivery pin adjusting sleeve, the misdelivery adjusting rod and other parts, so that the misdelivery pin keeps the state that the straight part of the head is 0.5mm higher than the stripper plate. When the mould normally punches, because the misdelivery round pin dimensional tolerance is controlled according to the dimensional tolerance of leading the positive round pin (dimensional tolerance control is within 0.005mm, lead the positive hole clearance with the strip and control within 0.02 mm), because the burr exists, the misdelivery round pin enters into in the strip material leads the positive hole with frictional mode, carry out the accurate positioning, play and lead the positive round pin effect, the tensioning force of O type sealing washer makes the misdelivery round pin when getting into the strip material and leading the positive hole, can not lead to the misdelivery round pin to trigger the misdelivery switch because of frictional force, thereby lead to appearing "the misdelivery" phenomenon. When the strip is mistakenly fed, the mistaken feeding pin touches the strip, the mistaken feeding pin cannot enter the strip guide hole at the moment, the blanking is performed equivalently, the ejection force is far greater than the tension force of the O-shaped sealing ring, the mistaken feeding pin, the mistaken feeding adjusting rod and the detecting rod are retracted, the mistaken feeding microswitch is triggered, the machine tool is stopped, and the mistaken feeding protection effect is achieved. When the mould is maintained, the misdelivery pin can not fall off when the stripper plate seat and the stripper plate turn over because of the tension force of the O-shaped sealing ring.
The invention has the following beneficial effects: 1. because the error delivery pin adopts the same gap size with the strip material guide hole as the guide pin, the whole strip material is effectively guided, and the gap between the error delivery pin and the guide pin as well as the strip material guide hole is controlled within 0.02mm, thereby not only ensuring the positioning precision of the multi-station progressive die, but also ensuring the uniformity of spare parts;
2. in the high-speed blanking process, when a strip is guided, the misdelivery pin cannot slide upwards due to small clearance between the misdelivery pin and the strip guide hole due to friction force, the misdelivery microswitch is triggered, and the phenomenon of 'false misdelivery' occurs;
3. when the multi-station progressive die is maintained, the mistaken delivery pin is fixed on the positioning sleeve due to the tension force of the O-shaped sealing ring, and the mistaken delivery pin does not fall off when the discharging plate seat and the discharging plate turn over.
Drawings
FIG. 1 is a schematic diagram of a conventional misleading pin configuration.
Fig. 2 is a schematic structural diagram of the present invention.
FIG. 3 is a schematic diagram of the present invention for providing mis-transmission protection
FIG. 4 is a schematic view of pilot pin and misfeed pin distribution locations.
Fig. 5 is a schematic view of the present invention in service and maintenance.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings.
The dual-purpose mechanism for strip material guiding and mis-delivery protection comprises an upper die base 1 and a discharge plate base 2, wherein the bottom surface of the upper die base 1 is connected with an upper base plate 12, the bottom surface of the upper base plate 12 is connected with a male die fixing plate 13, the upper base plate 12 and the male die fixing plate 13 extend into a groove in the top surface of the discharge plate base 2, the bottom surface of the discharge plate base 2 is connected with a discharge plate 3, and the discharge plate 3 is tightly attached to a strip material 4; a flange plug screw 14, a rectangular spring 15, an adjusting rod 7 and a misdelivery pin adjusting rod 8 are sequentially arranged in a vertical through hole penetrating through the upper die holder 1 and the upper backing plate 12, the lower end of the misdelivery pin adjusting rod 8 is connected with a misdelivery pin 16, and the misdelivery pin 16 penetrates through the punch fixing plate 13, the discharging plate seat 2 and the discharging plate 3; the detection rod 9 is horizontally arranged at the bottom of the upper die holder 1 through the mis-feeding detection fixing block 10, the arc-shaped head of the detection rod 9 is arranged in the arc-shaped groove on the surface of the mis-feeding pin adjusting rod 8, and the detection rod 9 is connected with the mis-feeding microswitch 11; the head of the misfeed pin 16 protrudes above the bottom surface of the stripper plate 3; the size of the gap between the misdelivery pin 16 and the pilot hole of the strip 4 is set to be equal to the size of the gap between the pilot pin and the pilot hole of the strip 4; the inner walls of through holes, through which the misdelivery pins 16 penetrate, of the discharging plate seat 2 and the discharging plate 3 are connected with a positioning sleeve 18, an O-shaped sealing ring 19 is arranged on the inner wall of the positioning sleeve 18, and the misdelivery pins 16 are clamped by the positioning sleeve 18 through the O-shaped sealing ring 19.
The dimensional tolerance of the single part is controlled within 0.005mm, and the clearance between the misdelivery pin 16 and the pilot hole of the strip 4 is controlled within 0.02 mm.
The head of the misfeed pin 16 protrudes 0.5mm above the bottom surface of the stripper plate 3.
The head of the positioning sleeve 18 is flush with the discharging plate 3, the tail of the positioning sleeve 18 is hung on the discharging plate seat 2 through a circle of flange, and the middle part of the misdelivery pin 16 is in interference fit with the inner wall of the discharging plate seat 2.
The misdelivery pin 16 is sleeved with a misdelivery pin adjusting sleeve 17, and the tail part of the positioning sleeve 18 abuts against the shaft shoulder of the misdelivery pin 16 through the misdelivery pin adjusting sleeve 17.
First, during normal blanking, the misfeed pin is 0.5mm above the stripper plate and the head size is
Figure BDA0002319468510000061
When the guide hole on the strip is led in, the gap is controlled within 0.02mm, the normal strip accurate positioning effect is achieved, the tension force of the O-shaped sealing ring is larger than the friction force between the misdelivery pin and the burr of the strip guide hole, the misdelivery pin cannot slide upwards, the misdelivery microswitch is triggered, the 'false misdelivery' phenomenon occurs, and the multi-station progressive die can normally produce high-requirement products (as shown in figure 2). When the misdelivery of the strip occurs, when the misdelivery pin of the guide and misdelivery protection dual-purpose mechanism can not guide the strip, the misdelivery pin collides with the strip, and the collision force is greater than the tension force of the O-shaped sealing ring, so that the misdelivery pin is upwards retracted, the misdelivery pin adjusting rod is driven to upwards retract, the detection rod is upwards retracted, the misdelivery microswitch is triggered, the machine tool is stopped, and the misdelivery protection effect is achieved. (see fig. 3). When the maintenance of the multi-station progressive die, the discharging plate seat and the discharging plate need to be normally turned over, the traditional guide pin can fall, the guide pin part is unqualified due to the great risk, and the new guide pin and the misdelivery pin of the misdelivery protection dual-purpose structure can not fall off from the positioning sleeve due to the tension of the O-shaped sealing ring, so that the size precision of the part is protected, and the convenient maintenance effect is realized.
In the normal high-speed blanking process, the strip materials are accurately positioned by the misdelivery pins and the tension of the O-shaped sealing ring ensures that the misdelivery pins cannot generate false misdelivery phenomenon due to friction force and a multi-station progressive die can be ensured to produce high-requirement products; when the strip materials are delivered by mistake, the mis-delivery pin dispensing rod, the detection rod and the like are used for combined transmission, and a mis-feeding microswitch is started to stop the machine tool; when the multi-station progressive die is maintained and repaired, the tension of the O-shaped sealing ring ensures that the misdelivered pin cannot fall off from the positioning sleeve, and the risk of deviation of the size caused by the falling of the misdelivered pin is avoided; the invention can not only solve the problems that the multi-station progressive die needs to accurately position the strip and carry out error feeding protection, but also solve the problem that the guide pin does not fall off during maintenance.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but rather by the equivalents thereof as may occur to those skilled in the art upon consideration of the present inventive concept.

Claims (5)

1. A dual-purpose mechanism for strip material guiding and mis-delivery protection comprises an upper die base (1) and a discharging plate base (2), wherein the bottom surface of the upper die base (1) is connected with an upper base plate (12), the bottom surface of the upper base plate (12) is connected with a male die fixing plate (13), the upper base plate (12) and the male die fixing plate (13) extend into a groove in the top surface of the discharging plate base (2), the bottom surface of the discharging plate base (2) is connected with a discharging plate (3), and the discharging plate (3) is tightly attached to a strip material (4); a flange plug screw (14), a rectangular spring (15), an adjusting rod (7) and a misdelivery pin adjusting rod (8) are sequentially arranged in a vertical through hole penetrating through the upper die base (1) and the upper backing plate (12), the lower end of the misdelivery pin adjusting rod (8) is connected with a misdelivery pin (16), and the misdelivery pin (16) penetrates through the punch fixing plate (13), the discharging plate base (2) and the discharging plate (3); the detection rod (9) is horizontally arranged at the bottom of the upper die holder (1) through the mis-feeding detection fixing block (10), the arc-shaped head of the detection rod (9) is arranged in the arc-shaped groove on the surface of the mis-feeding pin adjusting rod (8), and the detection rod (9) is connected with a mis-feeding microswitch (11); the head of the misdelivery pin (16) protrudes out of the bottom surface of the stripper plate (3); the method is characterized in that:
the size of the gap between the misdelivery pin (16) and the pilot hole of the strip material (4) is set to be equal to the size of the gap between the pilot pin and the pilot hole of the strip material (4); the inner walls of through holes, through which the misdelivery pins (16) penetrate, of the discharging plate seat (2) and the discharging plate (3) are connected with a positioning sleeve (18), an O-shaped sealing ring (19) is arranged on the inner wall of the positioning sleeve (18), and the misdelivery pins (16) are clamped by the positioning sleeve (18) through the O-shaped sealing ring (19).
2. The dual purpose mechanism for strip straightening and misfeed protection as claimed in claim 1, wherein: the dimensional tolerance of a single part is controlled within 0.005mm, and the clearance between the mis-feeding pin (16) and the pilot hole of the strip material (4) is controlled within 0.02 mm.
3. The dual purpose mechanism for strip straightening and misfeed protection as claimed in claim 1, wherein: the head of the misdelivery pin (16) protrudes 0.5mm from the bottom surface of the stripper plate (3).
4. The dual purpose mechanism for strip straightening and misfeed protection as claimed in claim 1, wherein: the head of the positioning sleeve (18) is flush with the discharging plate (3), the tail of the positioning sleeve (18) is hung on the discharging plate seat (2) through a circle of flange, and the middle part of the misdelivery pin (16) is in interference fit with the inner wall of the discharging plate seat (2).
5. The dual purpose mechanism for strip straightening and misfeed protection as claimed in claim 1, wherein: the misdelivery pin (16) is sleeved with a misdelivery pin adjusting sleeve (17), and the tail part of the positioning sleeve (18) abuts against the shaft shoulder of the misdelivery pin (16) through the misdelivery pin adjusting sleeve (17).
CN201911292103.9A 2019-12-16 2019-12-16 Dual-purpose mechanism for strip material guiding and false feeding protection Active CN110947841B (en)

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