CN212443051U - Body temperature stamping die for producing aluminum alloy shell with rectangular blind holes - Google Patents

Abstract

The utility model belongs to the technical field of the mould, a be used for producing aluminum alloy shell body temperature stamping die with rectangle blind hole is disclosed, including cope match-plate pattern and lower bolster, the lower extreme of cope match-plate pattern is equipped with cushion and drift fixed cover in proper order, and the middle part of drift fixed cover is equipped with the drift, and the lower extreme of drift has the working section of shaping, and the periphery of drift fixed cover is equipped with fastening device; the upper end of the lower template is sequentially provided with a lower die punching pad and a lower die outer sleeve, the middle part of the lower die outer sleeve is provided with a lower die core, the middle part of the lower die core is provided with a step-shaped movable cavity, a lower top punch is matched in the movable cavity in a sliding manner, a forming cavity is formed between the upper end of the lower top punch and the lower die core, and the periphery of the lower die outer sleeve is provided with a lower fastening mechanism; the punch fixing sleeves on the two sides of the punch are respectively provided with a guide pillar, and the lower die is sleeved with a guide hole corresponding to the guide pillar. The die is simple and compact in structure, convenient to disassemble and assemble, and excellent in quality of the aluminum alloy rectangular blind hole shell forge piece formed by warm stamping.

Description

Body temperature stamping die for producing aluminum alloy shell with rectangular blind holes

Technical Field

The utility model relates to the technical field of mold, specifically be a body temperature stamping die for producing aluminum alloy shell with rectangle blind hole.

Background

The shells of various communication equipment, such as the filter shell of microwave communication, the power amplifier shell, the outer conductors of various specifications of the power divider, and the like, are all aluminum alloy shell parts with rectangular blind holes; the requirement on the dimensional precision is high, the requirement on the smoothness of an inner hole cavity is quite high, the radius of a fillet at the intersection part of the side wall and the bottom surface of the inner hole is extremely small, and the fillet at the intersection part of the side wall of the inner hole is smaller, so that the conventional metal cutting machining process is difficult to machine, and the numerical control milling machining or the method of numerical control milling machining and electric spark forming machining is generally adopted for production; when the shells are machined by adopting the numerical control milling machining or the numerical control milling machining plus the electric spark forming machining method, qualified rectangular blind hole shells can be obtained, but the machining method has the advantages of extremely low material utilization rate, low production efficiency (only milling cutters with smaller diameters can be adopted, so the machining amount is not large each time, long machining time is needed), large energy consumption, long production period and high manufacturing cost, so the production scale of domestic telecommunication enterprises is not large, the yield is not high, and the competition with related international industries is difficult.

Some domestic telecommunication enterprises adopt a precision casting technology to produce the shell, but because the inner hole cavity of the cast shell has poor smoothness and the shell always has casting defects of air holes, impurities and the like, the telecommunication performance of the shell is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a be used for producing aluminum alloy shell body temperature stamping die that has the rectangle blind hole, the product quality who solves prior art existence is low, the rejection rate is high, and the problem that production efficiency is low.

The utility model provides a mould structure is: a body temperature stamping die for producing an aluminum alloy shell with rectangular blind holes comprises an upper die plate and a lower die plate, wherein the lower end of the upper die plate is sequentially provided with an upper cushion block and a punch fixing sleeve, the middle part of the punch fixing sleeve is provided with a punch, the upper end of the punch is provided with a flange, the lower end of the punch extends out of the punch fixing sleeve, the lower end of the punch is provided with a forming working section matched with the rectangular blind holes, and the periphery of the punch fixing sleeve is provided with an upper fixing mechanism for tightly pressing and fixing the punch fixing sleeve so as to fasten the punch;

the upper end of the lower template is sequentially provided with a lower die punching pad and a lower die outer sleeve, the middle part of the lower die outer sleeve is provided with a lower die core which is in taper interference fit and cold press fit, the middle part of the lower die core is provided with a step-shaped movable cavity, the movable cavity is vertically communicated, a lower top punch with a matched shape is in sliding fit in the movable cavity, a forming cavity is formed between the upper end of the lower top punch and the lower die core, and the periphery of the lower die outer sleeve is provided with a lower fastening mechanism for pressing and fixing the lower die outer sleeve;

the punch fixing sleeves on two sides of the punch are respectively provided with a guide pillar, the upper end of each guide pillar is provided with a flange, the part of each guide pillar with the flange is positioned in the upper cushion block, the lower end of each guide pillar extends out of the punch fixing sleeve, and the lower die is sleeved with a guide hole corresponding to each guide pillar.

The installation and forming process of the die comprises the following steps:

an operator firstly arranges the punch fixing sleeve in the upper pressure plate, then installs the punch and the two guide pillars in the punch fixing sleeve, then arranges the upper cushion block on the upper end surface of the punch fixing sleeve and ensures that the large cylindrical surfaces at the upper ends of the two guide pillars are installed in the two circular holes of the upper cushion block, then arranges the upper template on the upper end surface of the upper cushion block, and then presses and fixes the punch fixing sleeve by the upper fastening mechanism; then a lower die cushion, a lower die core and a lower die outer sleeve are sequentially installed, and the lower die outer sleeve is tightly pressed through a lower fastening mechanism;

firstly, a power supply of forging forming equipment is turned on, the forging forming equipment is started, and then warm forging lubricant is uniformly coated on a forming working section of a punch and a forming cavity in a lower die core; taking the heated and heat-insulated aluminum alloy blank out of the heating furnace and placing the heated and heat-insulated aluminum alloy blank into a forming cavity in the lower die core, operating forging forming equipment to enable the punch to move downwards, and punching a rectangular blind hole in the aluminum alloy blank if the punch continues to move downwards after the punch is contacted with the upper end face of the aluminum alloy blank; when the press forming process is completed, the press forming apparatus is operated to return the punch (i.e., the punch moves upward), and when the punch moves upward to a certain position, the return is stopped and the forging is taken out.

The mould structure has the advantages that:

the surface roughness of the inner cavity of the aluminum alloy shell forging formed by warm stamping reaches Ra0.8-Ra1.6 mu m, the size precision is high, the size consistency is good, the fillet of the side wall and the bottom surface of the inner cavity is smaller than R0.2mm, and the fillet of the intersection part of the side wall of the inner hole is smaller than R0.2mm, so that the technical requirements of shell parts are completely met; meanwhile, the shell forged piece formed by warm stamping does not have the defects of sand holes, burrs, cracks, folding and the like, so that the telecommunication performance of the shell is improved.

The die ensures that the blank cannot deviate in the stamping forming process, the yield of the forged piece is improved, the production efficiency and the safety are improved, the die is simple and compact in structure, the die is convenient to disassemble and assemble, and the quality of the aluminum alloy rectangular blind hole shell forged piece formed by warm stamping is excellent.

Furthermore, the upper fastening mechanism comprises an upper pressing plate and six upper connecting bolts, and the upper connecting bolts are uniformly distributed along the circumferential direction of the punch fixing sleeve; the lower end of the punch fixing sleeve is provided with a section of small outer cylindrical surface, the small outer cylindrical surface at the lower end of the punch fixing sleeve is tightly contacted with the upper pressure plate, and the lower end surface of the upper pressure plate is flush with the lower end surface of the punch fixing sleeve; six bolt counter bores which are uniformly distributed are formed in the upper pressure plate, the heads of the upper connecting bolts are located in the bolt counter bores, and the screw rods of the upper connecting bolts are in threaded connection with the upper die plate;

the lower fastening mechanism comprises a lower pressing plate and six lower connecting bolts, and the lower connecting bolts are uniformly distributed along the circumferential direction of the punch fixing sleeve; a section of small outer cylindrical surface is processed at the upper end of the lower die outer sleeve, the small outer cylindrical surface at the upper end of the lower die outer sleeve is tightly contacted with the upper pressure plate, and the upper end surface of the lower pressure plate is lower than the upper end surface of the lower die outer sleeve; six bolt counter bores which are uniformly distributed are formed in the lower pressing plate, the heads of the lower connecting bolts are located in the bolt counter bores, and the screw rods of the lower connecting bolts are connected with the threads of the lower die pad.

Through the design, the upper pressing plate applies longitudinal pressure to the punch fixing sleeve, and the lower pressing plate applies longitudinal pressure to the lower die outer sleeve to fix the punch and the lower die core; the design has simple structure, reliable fixation and convenient disassembly and assembly.

Further, the movable cavity comprises a first cavity section at the upper part and a second cavity section at the lower part, the diameter of the first cavity section is smaller than that of the second cavity section, the lower ejection punch comprises a small-diameter section at the upper part and a large-diameter section at the lower part, the small-diameter section is in sliding fit with the first cavity section, the large-diameter section is in sliding fit with the second cavity section, and the axial length of the small-diameter section is greater than that of the first cavity section;

the lower die punching pad is provided with a first through hole, the lower die plate is provided with a second through hole, the first through hole and the second through hole are coaxial and communicated, a connecting point is located in the lower die plate, the aperture of the first through hole is larger than that of the second through hole, the aperture of the first through hole is smaller than that of the second through hole, and the first through hole and the second through hole are matched with a lower ejector rod in a sliding mode.

Through the design, the lower ejection punch and the lower ejector rod are respectively limited in stroke; after warm stamping forming is completed, the lower ejector rod moves upwards, and the aluminum alloy shell forged piece formed by warm stamping is automatically ejected out through the lower ejector rod, so that material taking is facilitated.

Drawings

Fig. 1 is a schematic structural view of a stamping die for producing an aluminum alloy shell body temperature with rectangular blind holes according to the present invention;

fig. 2 is a bottom view of the punch retaining sleeve of the present invention;

fig. 3 is a schematic structural view of the punch according to the present invention;

fig. 4 is a bottom view of the punch according to the present invention.

Detailed Description

The following is further detailed by the specific embodiments:

reference numerals in the drawings of the specification include: the die comprises an upper die plate 1, a lower die plate 2, an upper cushion block 3, a punch 4, a punch fixing sleeve 5, an upper fastening mechanism 6, an upper pressing plate 601, an upper connecting bolt 602, a lower punching pad 7, a lower die core 8, a lower die jacket 9, a movable cavity 10, a first cavity section 101, a second cavity section 102, a lower punching 11, a first through hole 12, a second through hole 13, a lower ejector rod 14, a guide pillar 15, a guide hole 16, a lower fastening mechanism 17, a lower pressing plate 171 and a lower connecting bolt 172.

The embodiment is shown in fig. 1, the body temperature stamping die for producing the aluminum alloy shell with the rectangular blind hole comprises an upper die plate 1 and a lower die plate 2, an upper cushion block 3 and a punch fixing sleeve 5 are sequentially arranged at the lower end of the upper die plate 1, a punch 4 is arranged in the middle of the punch fixing sleeve 5, a flange for fastening (refer to fig. 3 and 4) is arranged at the upper end of the punch 4, the lower end of the punch 4 extends out of the punch fixing sleeve 5, the lower end of the punch 4 is provided with a forming working section matched with the rectangular blind hole, and the joint of the forming working section and the punch 4 is in large arc transition, so that stress concentration is avoided, and the forming working section is prevented from being broken in the warm stamping.

An upper fastening mechanism 6 for tightly pressing and fixing the punch fixing sleeve 5 so as to fasten the punch 4 is arranged on the periphery of the punch fixing sleeve 5, the upper fastening mechanism 6 comprises an upper pressing plate 601 and six upper connecting bolts 602 which are uniformly distributed along the circumferential direction of the punch fixing sleeve 5, referring to fig. 2, the lower end of the punch fixing sleeve 5 is provided with a small outer cylindrical surface with a diameter smaller than that of the outer cylindrical surface of the upper end, the upper pressing plate 601 is arranged in a ring shape, the end part of the upper pressing plate 601, which is close to the punch fixing sleeve 5, is pressed on the small outer cylindrical surface of the lower end of the punch fixing sleeve 5, and the lower end surface of the upper pressing plate; six bolt counter bores which are uniformly distributed are formed in the upper pressure plate 601, the heads of the upper connecting bolts 602 (the number of the upper connecting bolts is six) are located in the bolt counter bores of the upper pressure plate 601, and the screw rods of the upper connecting bolts 602 are in threaded connection with the upper template 1.

The upper end of lower bolster 2 is equipped with the lower mould in proper order and dashes pad 7 and lower mould overcoat 9, and the middle part of lower mould overcoat 9 is equipped with through tapering interference fit, cold press fitting's lower mold core 8, and the middle part of lower mold core 8 is equipped with and is step-like movable chamber 10, and link up from top to bottom in movable chamber 10, and sliding fit has the lower top of form adaptation to dash 11 in movable chamber 10, is formed with the shaping chamber between the upper end that dashes 11 down and lower mold core 8.

The movable cavity 10 comprises a first cavity section 101 at the upper part and a second cavity section 102 at the lower part, the diameter of the first cavity section 101 is smaller than that of the second cavity section 102, the lower ejection punch 11 comprises a small-diameter section at the upper part and a large-diameter section at the lower part, the small-diameter section is in sliding fit with the first cavity section 101, the large-diameter section is in sliding fit with the second cavity section 102, and the axial length of the small-diameter section is larger than that of the first cavity section 101.

The lower die punching pad 7 is provided with a first through hole 12, the lower die plate 2 is provided with a second through hole 13, the movable cavity 10, the first through hole 12 and the second through hole 13 are coaxial and communicated, the joint of the first through hole 12 and the second through hole 13 is positioned in the lower die plate 2, the aperture of the first through hole 12 is larger than that of the second through hole 13, the aperture of the first through hole 12 is smaller than that of the second cavity section 102, and the first through hole 12 and the second through hole 13 are in sliding fit with a lower ejector rod 14.

The periphery of the lower die outer sleeve 9 is provided with lower fastening mechanisms 17 for pressing and fixing the lower die outer sleeve 9, each lower fastening mechanism 17 comprises a lower pressing plate 171 and lower connecting bolts 172, and the lower connecting bolts 172 are uniformly distributed along the circumferential direction of the punch fixing sleeve 5, and the number of the lower connecting bolts is six; a section of small outer cylindrical surface is processed at the upper end of the lower die outer sleeve 9, the small outer cylindrical surface at the upper end of the lower die outer sleeve 9 is tightly contacted with the upper pressure plate 601, and the upper end surface of the lower pressure plate 171 is lower than the upper end surface of the lower die outer sleeve 9; six bolt counter bores which are uniformly distributed are formed in the lower pressing plate 171, the heads of the lower connecting bolts 172 are located in the bolt counter bores, and the screw rods of the lower connecting bolts 172 are connected with the threads of the lower die pad.

Two guide posts 15 are symmetrically arranged on the punch fixing sleeve 5 on two sides of the punch 4, flanges are arranged at the upper ends of the guide posts 15, the parts of the guide posts 15 with the flanges are located in the upper cushion block 3, the parts can be firmly fixed only by the upper pressing plate 601, the lower ends of the guide posts 15 extend out of the punch fixing sleeve 5, the lower die outer sleeve 9 is provided with guide holes 16 corresponding to the guide posts 15, and the axial length of the guide holes 16 is greater than that of the parts of the guide posts 15 extending out of the punch fixing sleeve 5.

(1) The installation process of the die is as follows:

1) an operator firstly places the punch fixing sleeve 5 in the upper pressing plate 601, then installs the punch 4 and the two guide pillars 15 in the punch fixing sleeve 5, then places the upper cushion block 3 on the upper end surface of the punch fixing sleeve 5 and ensures that the large cylindrical surfaces of the upper ends of the two guide pillars 15 are installed in the two circular holes of the upper cushion block 3, then places the upper die plate 1 on the upper end surface of the upper cushion block 3, and then tightly fixes the punch fixing sleeve 5 on the upper die plate 1 through six upper connecting bolts 602 and six threaded holes in the upper die plate 1;

2) firstly, cold pressing the lower mold core 8 into the lower mold jacket 9 to ensure that the lower end surface of the lower mold core 8 is flush with the lower end surface of the lower mold jacket 9; the lower ejector rod 14 is arranged in the lower template 2, and then the lower die punching pad 7 is arranged on the upper end surface of the lower template 2; placing a lower ejection punch 11 on the upper end surface of a lower punch pad 7, placing a lower die outer sleeve 9 which is provided with a lower die core 8 in a press fit manner on the upper end surface of the lower punch pad 7, and ensuring that the lower ejection punch 11 is positioned in a movable cavity 10; the lower press plate 171 is mounted on the lower die case 9, and then the lower die case 9 is tightly fixed to the lower die plate 2 by 6 lower connecting bolts 172 and 6 screw holes in the lower die plate 2.

3) An operator firstly fixes the upper end face of the assembled upper template 1 and the lower end face of the forging and forming device tightly through a pressing plate and a bolt, then fixes the lower end face of the assembled lower template 2 and the upper end face of a workbench of the forging and forming device tightly through the pressing plate and the bolt, and ensures that 2 guide posts 15 in the punch fixing sleeve 5 can be inserted into two guide holes 16 in the lower die outer sleeve 9 smoothly without resistance.

(2) The forming process comprises the following steps:

firstly, a power supply of forging and forming equipment is turned on, the forging and forming equipment is started, and then warm forging lubricant is uniformly coated in a forming working section of a punch 4 and a forming cavity of a lower die core 8; taking the heated and heat-insulated aluminum alloy blank out of the heating furnace and putting the heated and heat-insulated aluminum alloy blank into a forming cavity, operating forging forming equipment to enable the punch 4 to move downwards, and punching a rectangular blind hole in the aluminum alloy blank if the punch 4 continues to move downwards after the punch 4 is contacted with the upper end surface of the aluminum alloy blank; after the stamping forming processing is finished, the stamping forming equipment is operated to enable the punch 4 to return (namely, the punch 4 moves upwards), when the punch 4 moves upwards to a certain position, the return is stopped, the stamping forming equipment is operated to enable the lower ejector rod 14 to move upwards, the upper ejector rod can push the lower ejector rod 11 to move upwards through the upward movement, and the aluminum alloy forged piece which is stamped and formed is ejected out of the forming cavity due to the upward movement of the lower ejector rod 11, and then the forged piece is taken out.

The above embodiments of the present invention are only examples, and the common knowledge of the known specific structures and characteristics in the schemes is not described too much, it should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, and these should 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.

Claims (3)

1. The utility model provides a body temperature stamping die for producing aluminum alloy shell with rectangle blind hole, includes cope match-plate pattern and lower bolster, its characterized in that: the lower end of the upper template is sequentially provided with an upper cushion block and a punch fixing sleeve, the middle part of the punch fixing sleeve is provided with a punch, the upper end of the punch is provided with a flange, the lower end of the punch extends out of the punch fixing sleeve, the lower end of the punch is provided with a forming working section matched with the rectangular blind hole, and the periphery of the punch fixing sleeve is provided with an upper fixing mechanism for tightly pressing and fixing the punch fixing sleeve so as to fasten the punch;

the upper end of the lower template is sequentially provided with a lower die punching pad and a lower die outer sleeve, the middle part of the lower die outer sleeve is provided with a lower die core which is in taper interference fit and cold press fit, the middle part of the lower die core is provided with a step-shaped movable cavity, the movable cavity is vertically communicated, a lower top punch with a matched shape is in sliding fit in the movable cavity, a forming cavity is formed between the upper end of the lower top punch and the lower die core, and the periphery of the lower die outer sleeve is provided with a lower fastening mechanism for pressing and fixing the lower die outer sleeve;

the punch fixing sleeves on two sides of the punch are respectively provided with a guide pillar, the upper end of each guide pillar is provided with a flange, the part of each guide pillar with the flange is positioned in the upper cushion block, the lower end of each guide pillar extends out of the punch fixing sleeve, and the lower die is sleeved with a guide hole corresponding to each guide pillar.

2. The stamping die for producing the aluminum alloy shell body temperature with the rectangular blind hole as claimed in claim 1, wherein: the upper fastening mechanism comprises an upper pressing plate and six upper connecting bolts, and the upper connecting bolts are uniformly distributed along the circumferential direction of the punch fixing sleeve; the lower end of the punch fixing sleeve is provided with a section of small outer cylindrical surface, the small outer cylindrical surface at the lower end of the punch fixing sleeve is tightly contacted with the upper pressure plate, and the lower end surface of the upper pressure plate is flush with the lower end surface of the punch fixing sleeve; six bolt counter bores which are uniformly distributed are formed in the upper pressure plate, the heads of the upper connecting bolts are located in the bolt counter bores, and the screw rods of the upper connecting bolts are in threaded connection with the upper die plate;

the lower fastening mechanism comprises a lower pressing plate and six lower connecting bolts, and the lower connecting bolts are uniformly distributed along the circumferential direction of the punch fixing sleeve; a section of small outer cylindrical surface is processed at the upper end of the lower die outer sleeve, the small outer cylindrical surface at the upper end of the lower die outer sleeve is tightly contacted with the upper pressure plate, and the upper end surface of the lower pressure plate is lower than the upper end surface of the lower die outer sleeve; six bolt counter bores which are uniformly distributed are formed in the lower pressing plate, the heads of the lower connecting bolts are located in the bolt counter bores, and the screw rods of the lower connecting bolts are connected with the threads of the lower die pad.

3. The stamping die for producing the aluminum alloy shell body temperature with the rectangular blind hole as claimed in claim 2, wherein: the movable cavity comprises a first cavity section at the upper part and a second cavity section at the lower part, the diameter of the first cavity section is smaller than that of the second cavity section, the lower ejection punch comprises a small-diameter section at the upper part and a large-diameter section at the lower part, the small-diameter section is in sliding fit with the first cavity section, the large-diameter section is in sliding fit with the second cavity section, and the axial length of the small-diameter section is greater than that of the first cavity section;

the lower die punching pad is provided with a first through hole, the lower die plate is provided with a second through hole, the first through hole and the second through hole are coaxial and communicated, a connecting point is located in the lower die plate, the aperture of the first through hole is larger than that of the second through hole, the aperture of the first through hole is smaller than that of the second through hole, and the first through hole and the second through hole are matched with a lower ejector rod in a sliding mode.

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