CN113084160B - Alloy blade forming device and forming method thereof - Google Patents
Alloy blade forming device and forming method thereof Download PDFInfo
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- CN113084160B CN113084160B CN202110367851.XA CN202110367851A CN113084160B CN 113084160 B CN113084160 B CN 113084160B CN 202110367851 A CN202110367851 A CN 202110367851A CN 113084160 B CN113084160 B CN 113084160B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
- B22F2003/031—Press-moulding apparatus therefor with punches moving in different directions in different planes
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Abstract
The invention discloses an alloy blade forming device which comprises an upper punch, a die body, a lower punch and a round core rod, wherein the upper punch, the die body, the lower punch and the round core rod are sequentially arranged from top to bottom, a die cavity hole penetrates through the center of the die body, a polygonal hole forming part is arranged at the bottom of the upper punch, an upper matching hole matched with the round core rod is arranged at the center of the upper punch, the upper matching hole penetrates through the center of the hole forming part, a boss corresponding to the hole forming part is arranged at the top of the lower punch, a lower penetrating hole for the round core rod to penetrate through is formed in the centers of the lower punch and the boss, and a lower matching section matched with the round core rod is arranged at the top of the lower penetrating hole. Also disclosed is a forming method of an alloy blade forming device, comprising the steps of: a filler; pressing; and (5) demolding. The alloy blade forming device and the forming method thereof have the advantages of simple structure, convenient operation, prolonged service life, product quality assurance and capability of forming the alloy blade with the polygonal center positioning hole.
Description
Technical Field
The invention relates to the technical field of powder metallurgy, in particular to an alloy blade forming device and an alloy blade forming method.
Background
In the powder metallurgy technology, the powder forming process is the most important process in the production of alloy blades. The alloy blade generally comprises a screw clamping and positioning hole, and the screw clamping and positioning hole is a round hole; but a non-circular clamping screw hole is provided, and the hole type is polygonal, and is characterized in that the multi-directional clamping of the excessive positioning of the fastening screw and the central hole of the cutting blade can be realized, the adverse deformation of the fastening piece can be effectively controlled, and the service life of the cutter can be prolonged. In general, the alloy blade is formed by adopting a die device consisting of a die body, an upper punch, a lower punch and a round core bar, wherein the upper punch comprises an inner punch, and the inner punch is of a round solid structure; at the beginning of the forming period, the die body is static, the round core rod enters the die cavity hole to be level with the top surface of the die body, powder starts to be filled, the upper punch and the connected inner punch move downwards, meanwhile, the inner punch pushes the core rod to enable the core rod to enter the lower punch hole, and the lower punch moves upwards to reach the pressing position, so that the pressed compact forming is completed. Because the punch and the core bar structure in the die device are round, the formed locating hole is a round hole, and a polygonal hole type cannot be formed.
If the polygonal hole type die device is formed by adopting a polygonal inner punch, the fit clearance between the lower punch through hole and the core rod is ensured, and the fit clearance between the polygonal inner punch and the lower punch through hole is ensured, so that burrs at the hole type clamping position of the blade are smaller and powder is not leaked downwards during filling; therefore, the corresponding lower punch through hole and the core bar must be polygonal, and the shape of the hole of the lower punch through hole is consistent with that of the polygonal inner punch, but the method has the main problems that the polygonal core bar cannot be processed and manufactured by the common cylindrical grinding process, the curve grinding manufacturing cost is high, the manufacturing difficulty is high, the manufacturing precision is low, the shape of the lower punch polygonal through hole is complex, the manufacturing process is complex, and the manufacturing cost is high; meanwhile, when the polygonal core rod is clamped and adjusted by the die device, the accurate positioning direction of the lower punch through the hole cannot be realized, so that the product quality and the service life of the die cannot be guaranteed.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing the alloy blade forming device which has the advantages of simple structure, convenient operation, prolonged service life, product quality assurance and capability of forming the alloy blade with the polygonal center positioning hole.
Further provided is a forming method of an alloy blade forming device capable of improving the service life of the device, ensuring the product quality and forming an alloy blade with a polygonal center positioning hole.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides an alloy blade forming device, includes upper punch, die body, lower punch and the round core bar that from top to bottom set gradually, the die cavity hole has been run through at the die body center, the bottom of upper punch is equipped with the pore-forming portion that is the polygon, the center of upper punch is equipped with the last mating hole with round core bar adaptation, go up the mating hole and run through in the center of pore-forming portion, the top of lower punch is equipped with the boss that corresponds with pore-forming portion, the center of lower punch and boss runs through has the lower hole of crossing that supplies round core bar to pass through, the top of hole of crossing down is equipped with the lower mating section with round core bar adaptation.
As a further improvement of the above technical scheme:
the outline dimension of the top surface of the boss is the same as that of the bottom surface of the hole forming part, the side surface of the boss forms an included angle alpha with the central axis of the boss, alpha is more than or equal to 30 degrees and less than or equal to 45 degrees, and the height of the boss is H1, and H1 is more than or equal to 0.1mm and less than or equal to 0.2mm.
An upper through hole for allowing the round core rod to pass is formed in the center of the upper punch above the upper matching hole.
The die cavity hole comprises an upper punching section into which the upper punch is inserted, a lower punching section into which the lower punch is inserted and a profiling section for forming the alloy blade, and the profiling section is communicated between the upper punching section and the lower punching section.
The side surface of the hole forming part is an inclined demoulding surface, and the inclination angle of the demoulding surface is beta, and beta is more than or equal to 45 'and less than or equal to 60'.
The diameter of the round core rod is set to be D1, the minimum inscribed circle diameter of the top surface of the boss is set to be D2, and D1-D2 is more than or equal to 0.3mm and less than or equal to 0.5mm.
The diameter of the round core rod is set to be D1, the diameter of the lower matching section is set to be D3, D3-D1 is more than or equal to 0.01mm and less than or equal to 0.02mm, and the height of the lower matching section is set to be H1, wherein H1 is more than or equal to 8mm and less than or equal to 15mm.
The diameter of the round core rod is set to be D1, the diameter of the upper matching hole is set to be D4, D4-D1 is more than or equal to 0.02mm and less than or equal to 0.03mm, the height of the upper matching hole is set to be H2, and the height of the hole forming part is set to be H3, and H2-H3 is more than or equal to 5mm and less than or equal to 10mm.
The forming method of the alloy blade forming device comprises the following steps:
s1) filler: the lower punch is moved up to a die cavity hole of the die body, the round core rod is moved up to the die cavity hole along a lower through hole of the lower punch, the top surface of the round core rod is lower than the top surface of the die body, and at the moment, a powder filling cavity is formed in the die cavity hole of the die body for powder filling;
s2) pressing: the die body and the round core bar are kept fixed, and the upper punch and the lower punch move towards each other to reach a set pressing position, so that powder between the upper punch and the lower punch is extruded to form an alloy pressed compact;
s3) demolding: firstly, the upper punch, the alloy pressed compact and the lower punch are synchronously lifted until the alloy pressed compact is removed from the die cavity hole, then, the upper punch is continuously lifted to separate the alloy pressed compact from the upper punch or the lower punch, and then the alloy pressed compact is taken out.
As a further improvement of the above technical scheme:
in the step S2, the fit clearance between the upper punch and the die cavity hole is set to W1, W1 is more than or equal to 0.005mm and less than or equal to 0.025mm, the fit clearance between the lower punch and the die cavity hole is set to W2, W2 is more than or equal to 0.005mm and less than or equal to 0.015mm, and when the upper punch and the lower punch are at the set positions, the distance between the hole forming part and the boss is set to L, and L is more than or equal to 0.01mm and less than or equal to 0.02mm.
Compared with the prior art, the invention has the advantages that:
1. the alloy blade forming device is characterized in that a polygonal hole forming part is arranged at the bottom of an upper punch, a polygonal boss is arranged at the top of a lower punch, the boss is correspondingly arranged with the hole forming part, and when the upper punch and the lower punch move in opposite directions to reach a pressed set position, the hole forming part is attached to the boss for forming a polygonal positioning hole in the center of an alloy blade. Because the top of going down the hole is equipped with the lower cooperation section with round core bar adaptation, round core bar and lower cooperation section adaptation can prevent at the in-process of punching press, the powder is from round core bar and lower clearance blowout between the cooperation section, because the center of last drift is equipped with the last cooperation hole with round core bar adaptation, go up the cooperation hole and run through in the center of pore-forming portion, when the in-process that the upper punch moved down in the die cavity hole, round core bar and last cooperation hole cooperation, can prevent that the powder from being spouted from round core bar and the clearance between the upper cooperation hole, and the round core bar has the guide effect to the upper punch, can prevent that the upper punch from taking place decentration at the motion process of pushing down, thereby can improve life, and can guarantee product quality. The alloy blade forming device is simple in structure, convenient to operate, capable of prolonging service life, capable of guaranteeing product quality and capable of forming an alloy blade with a polygonal center positioning hole.
2. According to the forming method of the alloy blade forming device, the alloy pressed compact is formed by punching through the relative movement of the upper punch and the lower punch in the die cavity hole, and the polygonal center positioning hole in the center of the alloy pressed compact is formed by matching the boss and the hole forming part, so that the product quality can be ensured. Because the top of going down the hole is equipped with the lower cooperation section with round core bar adaptation, round core bar and lower cooperation section adaptation can prevent at the in-process of punching press, the powder is from round core bar and lower clearance blowout between the cooperation section, because the center of last drift is equipped with the last cooperation hole with round core bar adaptation, go up the cooperation hole and run through in the center of pore-forming portion, when the in-process that the upper punch moved down in the die cavity hole, round core bar and last cooperation hole cooperation, can prevent that the powder from being spouted from round core bar and the clearance between the upper cooperation hole, and the round core bar has the guide effect to the upper punch, can prevent that the upper punch from taking place decentration at the motion process of pushing down, thereby can improve life, and can guarantee product quality. The forming method of the alloy blade forming device can prolong the service life of the device, ensure the product quality and form the alloy blade with the polygonal center positioning hole.
Drawings
FIG. 1 is a view showing a construction state of an alloy blade forming apparatus according to the present invention.
Fig. 2 is an enlarged view at a in fig. 1.
Fig. 3 is a schematic top view of a die body of the alloy blade forming apparatus of the present invention.
Fig. 4 is a schematic cross-sectional view of the line B-B in fig. 3.
Fig. 5 is a schematic view of the structure of the upper punch of the alloy blade forming apparatus of the present invention.
Fig. 6 is an enlarged view at C in fig. 5.
Fig. 7 is a schematic top view of the lower punch of the alloy blade forming apparatus of the present invention.
Fig. 8 is a schematic cross-sectional view of the structure of fig. 7 taken along line E-E.
Fig. 9 is an enlarged view at F in fig. 8.
Fig. 10 is a schematic view of the structure of the hole forming portion of the alloy blade forming apparatus of the present invention.
Fig. 11 is a schematic structural view of a round core bar of the alloy blade forming apparatus of the present invention.
Fig. 12 is a schematic view of the structure of an alloy compact formed by processing with the alloy blade forming apparatus of the present invention.
Fig. 13 is a schematic sectional view of the G-G line in fig. 12.
The reference numerals in the drawings denote:
1. an upper punch; 11. an upper mating hole; 12. an upper pass-through hole; 2. a die body; 21. a cavity hole; 211. an upper punching section; 212. a lower punching section; 213. profiling sections; 3. a lower punch; 4. a round core bar; 5. a hole forming portion; 6. a boss; 7. a lower through hole; 71. a lower mating section; 8. a demolding surface; 9. and (5) alloy compacting.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific examples.
Embodiment one:
fig. 1 to 13 show an embodiment of an alloy blade forming device according to the present invention, the alloy blade forming device includes an upper punch 1, a die body 2, a lower punch 3 and a round core rod 4 sequentially arranged from top to bottom, a die cavity hole 21 is penetrated through the center of the die body 2, a polygonal hole forming portion 5 is provided at the bottom of the upper punch 1, an upper matching hole 11 adapted to the round core rod 4 is provided at the center of the upper punch 1, the upper matching hole 11 penetrates through the center of the hole forming portion 5, a boss 6 corresponding to the hole forming portion 5 is provided at the top of the lower punch 3, a lower penetrating hole 7 for the round core rod 4 to penetrate through is provided at the centers of the lower punch 3 and the boss 6, and a lower matching section 71 adapted to the round core rod 4 is provided at the top of the lower penetrating hole 7.
The alloy blade forming device is used for forming an alloy blade in the following process: firstly, the lower punch 3 is moved up into a die cavity hole 21 of the insert die body 2, the round core rod 4 is moved up into the insert die cavity hole 21 along a lower through hole 7 of the lower punch 3, and the top surface of the round core rod 4 is made lower than the top surface of the die body 2, at this time, the die cavity hole 21 forms a powder filling cavity above the lower punch 3 for powder filling; then, the die body 2 and the round core bar 4 are kept fixed, the upper punch 1 moves downwards to be inserted into the die cavity hole 21, the lower punch 3 moves upwards at the same time, the upper punch 1 and the lower punch 3 move towards each other, the purpose of extrusion powder forming is achieved, and when the upper punch 1 and the lower punch 3 move towards each other to reach the set pressing position, powder between the upper punch 1 and the lower punch 3 is extruded to form an alloy pressed blank 9; then, the upper punch 1, the alloy pressed compact 9 and the lower punch 3 are synchronously lifted until the alloy pressed compact 9 is removed from the die cavity hole 21, then, the upper punch 1 is continuously lifted to separate the alloy pressed compact 9 from the upper punch 1 or the lower punch 3, the purpose of demoulding is achieved, and then the alloy pressed compact 9 is taken out; finally, the upper punch 1 and the lower punch 3 return to the initial positions respectively, and after the next alloy pressed compact 9 is punched and formed, the alloy pressed compact 9 can be further polished in other equipment to form an alloy blade. The bottom of the upper punch 1 is provided with a polygonal hole forming part 5, the top of the lower punch 3 is provided with a polygonal boss 6, the boss 6 is arranged corresponding to the hole forming part 5, and when the upper punch 1 and the lower punch 3 move in opposite directions to reach a pressed set position, the hole forming part 5 is attached to the boss 6 for forming a polygonal positioning hole in the center of the alloy blade. Because the top of going down hole 7 is equipped with the lower cooperation section 71 that matches with round core bar 4, round core bar 4 and lower cooperation section 71 adaptation, can prevent in the process of punching press, the powder from the clearance blowout between round core bar 4 and the lower cooperation section 71, because the center of upper punch 1 is equipped with the last mating hole 11 that matches with round core bar 4, go up mating hole 11 and run through in the center of pore-forming portion 5, when the in-process that upper punch 1 moved down in die cavity hole 21, round core bar 4 cooperatees with last mating hole 11, can prevent the powder from the clearance blowout between round core bar 4 and the last mating hole 11, and, round core bar 4 has the guide effect to upper punch 1, can prevent that upper punch 1 from taking place the decentration at the motion process that pushes down, thereby can improve life, and can guarantee product quality. The alloy blade forming device is simple in structure, convenient to operate, capable of prolonging service life, capable of guaranteeing product quality and capable of forming an alloy blade with a polygonal center positioning hole.
The alloy blade forming device can realize the forming of the polygonal hole type of the alloy blade only by changing the structure of the die device (the relative structure of the upper punch 1 and the lower punch 3 and the structure of the center die cavity hole 21 of the die body 2) on the basis of not changing the clamp structure of the original die frame of the press and keeping the manufacturing process of the original forming device unchanged, can also achieve the purposes of ensuring the relatively uniform filling of powder, realizing the simple manufacturing and the accurate and efficient clamping adjustment of the forming device, and solves the problem of matching the polygonal core rod with the hole forming part 5.
In the embodiment, the outline dimension of the top surface of the boss 6 is the same as the outline dimension of the bottom surface of the hole forming part 5, the side surface of the boss 6 forms an included angle alpha with the central axis of the boss 6, alpha is more than or equal to 30 degrees and less than or equal to 45 degrees, the height of the boss 6 is H1, H1 is more than or equal to 0.1mm and less than or equal to 0.2mm. As shown in fig. 1, the outline dimension of the top surface of the boss 6 is the same as the outline dimension of the bottom surface of the hole forming part 5, when the upper punch 1 and the lower punch 3 move in opposite directions to reach the set pressing position, the bottom surface of the hole forming part 5 is completely attached to the top surface of the boss 6, so that the compaction of powder around the hole forming part 5 and the boss 6 is ensured, and the smoothness of the side wall of the polygonal positioning hole in the center of the alloy blade formed by the hole forming part 5 and the boss 6 is ensured. The arrangement of the polygonal boss 6 solves the problem that the polygonal core rod is matched with the hole forming part 5. The polygonal boss 6 is arranged in the center of the top of the lower punch 3, the manufacturing process is simple, the cost is low, the precision is high, and due to the boss 6, the side surface of the boss 6 has a guiding effect on the movement of powder in the compression molding process, so that a powder layer can be prevented from being formed between the boss 6 and the hole forming part 5, and the product quality is improved. As shown in FIG. 9, the side surface of the boss 6 forms an angle alpha with the central axis of the boss 6, 30 DEG alpha is less than or equal to 45 DEG, and at this time, the side surface of the boss 6 has a better guiding effect on the powder, and alpha is preferably 45 DEG, and at this time, the side surface of the boss 6 has the best guiding effect on the powder.
In this embodiment, as shown in fig. 1 and 6, an upper through hole 12 through which the round bar 4 passes is provided above the upper mating hole 11 at the center of the upper punch 1. The top of the upper mating hole 11 is prevented from colliding with the round core bar 4 during the downward movement of the upper punch 1.
In the present embodiment, as shown in fig. 4, the cavity hole 21 includes an upper punch section 211 into which the upper punch 1 is inserted, a lower punch section 212 into which the lower punch 3 is inserted, and a profiling section 213 for alloy blade forming, the profiling section 213 communicating between the upper punch section 211 and the lower punch section 212. The alloy blade forming device is used for forming an alloy blade in the following process: firstly, the lower punch 3 is moved up to be inserted into the lower punching section 212, the round core bar 4 is moved up to be inserted into the die cavity hole 21 along the lower passing hole 7 of the lower punch 3, and the top surface of the round core bar 4 is made lower than the top surface of the die body 2, at this time, the die cavity hole 21 forms a powder filling cavity above the lower punch 3 for powder filling; then, the die body 2 and the round core bar 4 are kept fixed, the upper punch 1 moves downwards to be inserted into the upper punching section 211, the lower punch 3 moves upwards at the same time, the upper punch 1 and the lower punch 3 move towards each other to achieve the purpose of forming extruded powder, when the upper punch 1 and the lower punch 3 move towards each other to reach a set pressing position (at the position, the top surface of the hole forming part 5 is flush with the bottom edge of the punching section 211, the bottom surface of the boss 6 is flush with the top edge of the lower punching section 212, the bottom surface of the hole forming part 5 is attached to the top surface of the boss 6), and the powder between the upper punch 1 and the lower punch 3 is extruded in the profiling section 213 to form an alloy pressed compact 9; then, the upper punch 1, the alloy compact 9 and the lower punch 3 are raised synchronously until the alloy compact 9 is removed from the cavity hole 21, and then the upper punch 1 is raised continuously to separate the alloy compact 9 from the upper punch 1 or the lower punch 3, thereby achieving the purpose of demoulding, and the alloy compact 9 is taken out. In the pressing process in which the upper punch 1 and the lower punch 3 move toward each other, as shown in fig. 2, the fit clearance between the upper punch 1 and the upper punch 211 of the cavity hole 21 is set to W1 such that W1 satisfies the relation 0.005 mm.ltoreq.w1.ltoreq.0.025 mm, powder is prevented from being ejected from the clearance between the upper punch 1 and the upper punch 211 of the cavity hole 21, optimally w1=0.01 mm, the fit clearance between the lower punch 3 and the lower punch 212 of the cavity hole 21 is set to W2 such that W2 satisfies the relation 0.005 mm.ltoreq.w2.ltoreq.0.015 mm, powder is prevented from being ejected from the clearance between the lower punch 3 and the lower punch 212 of the cavity hole 21, optimally w2=0.01 mm, and when the upper punch 1 and the lower punch 3 are in the set position, the distance between the bottom surface of the hole forming part 5 and the top surface of the boss 6 is set to L such that L satisfies the relation 0.01 mm.ltoreq.02 mm, and a powder layer is prevented from being formed between the bottom surface of the hole forming part 5 and the top surface of the boss 6, so as to improve the product quality.
In this embodiment, as shown in fig. 6, the side surface of the hole forming portion 5 is an inclined release surface 8, the inclination angle of the release surface 8 is β,45 '. Ltoreq.β.ltoreq.60 ', the inclination angle β of the release surface 8 is set in this range, and the release effect is good, and optimally, when β=50 ', the release effect is the best.
In this embodiment, as shown in fig. 10 and 11, the diameter (outer peripheral diameter) of the round core rod 4 is D1, the top surface of the boss 6 is polygonal, the minimum inscribed circle diameter is D2, D1-D2 is 0.3mm or less and 0.5mm or less, and in this structure, the top end of the boss 6 can have a certain thickness, so as to ensure the strength of the boss 6, and in the powder filling process, no powder is filled between the round core rod 4 and the lower matching section 71, so as to achieve the effect of profiling filler, and ensure the relatively uniform density of the periphery of the central positioning hole of the alloy compact 9 during molding. Optimally, d1-d2=0.4 mm.
In this embodiment, as shown in fig. 9 and 11, the diameter (outer peripheral diameter) of the round core rod 4 is D1, the diameter of the lower mating segment 71 is D3,0.01mm < D3-D1 < 0.02mm, and the height of the lower mating segment 71 is H1,8mm < H1 < 15mm, and in this configuration, powder can be prevented from being ejected from the gap between the round core rod 4 and the lower mating segment 71, preferably, D3-d1=0.01 mm, h1=10 mm.
In this embodiment, as shown in fig. 6 and 11, the diameter of the round core rod 4 is D1, the diameter of the upper mating hole 11 is D4, D4-D1 is 0.02mm or less and 0.03mm or less, the height of the upper mating hole 11 is H2, and the height of the hole forming portion 5 is H3, H2-H3 is 5mm or less and 10mm or less.
Embodiment two:
the forming method of the alloy blade forming device comprises the following steps:
s1) filler: the lower punch 3 moves up to the die cavity hole 21 of the die body 2, the round core rod 4 moves up to the die cavity hole 21 along the lower through hole 7 of the lower punch 3, and the top surface of the round core rod 4 is lower than the top surface of the die body 2, at the moment, a powder filling cavity is formed in the die cavity hole 21 of the die body 2, and powder filling is carried out;
s2) pressing: the die body 2 and the round core bar 4 are kept fixed, and the upper punch 1 and the lower punch 3 move towards each other to reach a set pressing position, so that powder between the upper punch 1 and the lower punch 3 is extruded to form an alloy pressed compact 9;
s3) demolding: first, the upper punch 1, the alloy compact 9, and the lower punch 3 are raised synchronously until the alloy compact 9 is removed from the cavity hole 21, and then, the upper punch 1 is raised continuously to separate the alloy compact 9 from the upper punch 1 or the lower punch 3, and then, the alloy compact 9 is taken out.
According to the forming method of the alloy blade forming device, the alloy pressed compact 9 is formed by punching through the relative movement of the upper punch 1 and the lower punch 3 in the die cavity hole 21, and the polygonal center positioning hole in the center of the alloy pressed compact 9 is formed by matching the boss 6 with the hole forming part 5, so that the product quality can be ensured. Because the top of going down hole 7 is equipped with the lower cooperation section 71 that matches with round core bar 4, round core bar 4 and lower cooperation section 71 adaptation, can prevent in the process of punching press, the powder from the clearance blowout between round core bar 4 and the lower cooperation section 71, because the center of upper punch 1 is equipped with the last mating hole 11 that matches with round core bar 4, go up mating hole 11 and run through in the center of pore-forming portion 5, when the in-process that upper punch 1 moved down in die cavity hole 21, round core bar 4 cooperatees with last mating hole 11, can prevent the powder from the clearance blowout between round core bar 4 and the last mating hole 11, and, round core bar 4 has the guide effect to upper punch 1, can prevent that upper punch 1 from taking place the decentration at the motion process that pushes down, thereby can improve life, and can guarantee product quality. The forming method of the alloy blade forming device can prolong the service life of the device, ensure the product quality and form the alloy blade with the polygonal center positioning hole.
In this embodiment, in step S2, the fit clearance between the upper punch 1 and the cavity hole 21 is W1, W1 is 0.005 mm.ltoreq.W1.ltoreq.0.025 mm, the fit clearance between the lower punch 3 and the cavity hole 21 is W2, W2 is 0.005 mm.ltoreq.W2.ltoreq.0.015 mm, and the distance between the hole forming portion 5 and the boss 6 is L, and L is 0.01 mm.ltoreq.0.02 mm when the upper punch 1 and the lower punch 3 are at the set positions. In the pressing process in which the upper punch 1 and the lower punch 3 are moved toward each other, as shown in fig. 2, the fit clearance between the upper punch 1 and the upper punch 211 of the cavity hole 21 is set to W1 such that W1 satisfies the relation 0.005 mm.ltoreq.w1.ltoreq.0.025 mm, ejection of powder from the clearance between the upper punch 1 and the upper punch 211 of the cavity hole 21 can be prevented, optimally w1=0.01 mm, the fit clearance between the lower punch 3 and the lower punch 212 of the cavity hole 21 is set to W2 such that W2 satisfies the relation 0.005 mm.ltoreq.w2.ltoreq.0.015 mm, ejection of powder from the clearance between the lower punch 3 and the lower punch 212 of the cavity hole 21 can be prevented, optimally w2=0.01 mm, and when the upper punch 1 and the lower punch 3 are in the set position, the clearance between the bottom surface of the hole forming part 5 and the top surface of the boss 6 is set to L such that L satisfies the relation 0.01 mm.ltoreq.l.02 mm, and formation of a powder layer between the bottom surface of the hole forming part 5 and the top surface of the boss 6 can be prevented, so as to improve the product quality.
The alloy blade forming device comprises the following specific forming processes of: firstly, the lower punch 3 is moved up to be inserted into the lower punching section 212, the round core bar 4 is moved up to be inserted into the die cavity hole 21 along the lower passing hole 7 of the lower punch 3, and the top surface of the round core bar 4 is made lower than the top surface of the die body 2, at this time, the die cavity hole 21 forms a powder filling cavity above the lower punch 3 for powder filling; then, the die body 2 and the round core bar 4 are kept fixed, the upper punch 1 moves downwards to be inserted into the upper punching section 211, the lower punch 3 moves upwards at the same time, the upper punch 1 and the lower punch 3 move towards each other to achieve the purpose of forming extruded powder, when the upper punch 1 and the lower punch 3 move towards each other to reach a set pressing position (at the position, the top surface of the hole forming part 5 is flush with the bottom edge of the punching section 211, the bottom surface of the boss 6 is flush with the top edge of the lower punching section 212, the bottom surface of the hole forming part 5 is attached to the top surface of the boss 6), and the powder between the upper punch 1 and the lower punch 3 is extruded in the profiling section 213 to form an alloy pressed compact 9; then, the upper punch 1, the alloy pressed compact 9 and the lower punch 3 are synchronously lifted until the alloy pressed compact 9 is removed from the die cavity hole 21, then, the upper punch 1 is continuously lifted to separate the alloy pressed compact 9 from the upper punch 1 or the lower punch 3, the purpose of demoulding is achieved, and then the alloy pressed compact 9 is taken out; finally, the upper punch 1 and the lower punch 3 return to the initial positions respectively, and the next alloy compact 9 is punched and formed, and the above steps are repeated to perform the next press forming. The alloy compact 9 can be further polished in other equipment to form an alloy blade.
While the invention has been described in terms of preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides an alloy blade forming device, includes upper punch (1), die body (2), lower punch (3) and round core bar (4) that from top to bottom set gradually, die cavity hole (21), its characterized in that have been run through at die body (2) center: the bottom of the upper punch (1) is provided with a polygonal hole forming part (5), the center of the upper punch (1) is provided with an upper matching hole (11) matched with the round core bar (4), the upper matching hole (11) penetrates through the center of the hole forming part (5), the top of the lower punch (3) is provided with a boss (6) corresponding to the hole forming part (5), the centers of the lower punch (3) and the boss (6) penetrate through a lower penetrating hole (7) for the round core bar (4) to penetrate through, the top of the lower penetrating hole (7) is provided with a lower matching section (71) matched with the round core bar (4), the die cavity hole (21) comprises an upper punching section (211) for the upper punch (1) to be inserted into, a lower punching section (212) for the lower punch (3) to be inserted into and a profiling section (213) for alloy blade forming, and the profiling section (213) is communicated between the upper punching section (211) and the lower punching section (212); the alloy blade forming device is used for forming an alloy blade in the following process: firstly, moving up the lower punch (3) to be inserted into the lower punching section (212), moving up the round core bar (4) to be inserted into the die cavity hole (21) along the lower through hole (7) of the lower punch (3), and enabling the top surface of the round core bar (4) to be lower than the top surface of the die body (2), wherein the die cavity hole (21) forms a powder filling cavity above the lower punch (3) at the moment, and filling powder; then, the die body (2) and the round core bar (4) are kept fixed, the upper punch (1) is moved downwards to be inserted into the upper punching section (211), the lower punch (3) is moved upwards, the upper punch (1) and the lower punch (3) are moved towards each other, the purpose of extrusion powder forming is achieved, and when the upper punch (1) and the lower punch (3) are moved towards each other to reach a set pressing position, powder between the upper punch (1) and the lower punch (3) is extruded in the profiling section (213) to form an alloy pressed blank (9); then, the upper punch (1), the alloy pressed compact (9) and the lower punch (3) are synchronously lifted until the alloy pressed compact (9) is removed from the die cavity hole (21), then, the upper punch (1) is continuously lifted to separate the alloy pressed compact (9) from the upper punch (1) or the lower punch (3), the purpose of demoulding is achieved, and then the alloy pressed compact (9) is taken out; in the pressing process of the upper punch (1) and the lower punch (3) moving in the opposite direction, the fit clearance between the upper punch (1) and the upper punching section (211) of the die cavity hole (21) is set to W1, so that W1 satisfies the relation of 0.005mm less than or equal to W1 less than or equal to 0.025mm, the fit clearance between the lower punch (3) and the lower punching section (212) of the die cavity hole (21) is set to W2, so that W2 satisfies the relation of 0.005mm less than or equal to W2 less than or equal to 0.015mm, and when the upper punch (1) and the lower punch (3) are at the set positions, the distance between the bottom surface of the hole forming part (5) and the top surface of the boss (6) is set to L, so that L satisfies the relation of 0.01mm less than or equal to L less than or equal to 0.02mm.
2. The alloy blade forming apparatus according to claim 1, wherein: the outline dimension of the top surface of the boss (6) is the same as the outline dimension of the bottom surface of the hole forming part (5), the side surface of the boss (6) and the central axis of the boss (6) form an included angle alpha which is more than or equal to 30 degrees and less than or equal to 45 degrees, and the height of the boss (6) is H1, more than or equal to 0.1mm and less than or equal to 0.2mm.
3. The alloy blade forming apparatus according to claim 1, wherein: an upper through hole (12) for allowing the round core bar (4) to pass through is arranged above the upper matching hole (11) at the center of the upper punch (1).
4. The alloy blade forming apparatus according to claim 1, wherein: the side surface of the hole forming part (5) is an inclined demoulding surface (8), and the inclination angle of the demoulding surface (8) is beta, and beta is more than or equal to 45 'and less than or equal to 60'.
5. The alloy blade forming apparatus according to any one of claims 1 to 4, wherein: the diameter of the round core bar (4) is set to be D1, and the minimum inscribed circle diameter of the top surface of the boss (6) is set to be D2, wherein D1-D2 is more than or equal to 0.3mm and less than or equal to 0.5mm.
6. The alloy blade forming apparatus according to any one of claims 1 to 4, wherein: the diameter of the round core bar (4) is set to be D1, the diameter of the lower matching section (71) is set to be D3, D3-D1 which is more than or equal to 0.01mm and less than or equal to 0.02mm, and the height of the lower matching section (71) is set to be H1, H1 which is more than or equal to 8mm and less than or equal to 15mm.
7. The alloy blade forming apparatus according to any one of claims 1 to 4, wherein: the diameter of the round core bar (4) is set to be D1, the diameter of the upper matching hole (11) is set to be D4, D4-D1 which is more than or equal to 0.02mm and less than or equal to 0.03mm, the height of the upper matching hole (11) is set to be H2, and the height of the hole forming part (5) is set to be H3, and H2-H3 which is more than or equal to 5mm and less than or equal to 10mm.
8. A forming method of the alloy blade forming apparatus according to any one of claims 1 to 7, comprising the steps of:
s1) filler: the lower punch (3) moves upwards into a die cavity hole (21) of the die body (2), the round core rod (4) moves upwards into the die cavity hole (21) along a lower through hole (7) of the lower punch (3), the top surface of the round core rod (4) is lower than the top surface of the die body (2), and at the moment, a powder filling cavity is formed in the die cavity hole (21) of the die body (2) for powder filling;
s2) pressing: the die body (2) and the round core bar (4) are kept fixed, and the upper punch (1) and the lower punch (3) move towards each other to reach a set pressing position, so that powder between the upper punch (1) and the lower punch (3) is extruded to form an alloy pressed compact (9);
s3) demolding: firstly, the upper punch (1), the alloy pressed compact (9) and the lower punch (3) are synchronously lifted until the alloy pressed compact (9) is removed from the die cavity hole (21), then, the upper punch (1) is lifted continuously to separate the alloy pressed compact (9) from the upper punch (1) or the lower punch (3), and then the alloy pressed compact (9) is taken out.
9. The forming method of the alloy blade forming apparatus according to claim 8, wherein: in the step S2, the fit clearance between the upper punch (1) and the die cavity hole (21) is W1, W1 is more than or equal to 0.005mm and less than or equal to 0.025mm, the fit clearance between the lower punch (3) and the die cavity hole (21) is W2, W2 is more than or equal to 0.005mm and less than or equal to 0.015mm, and when the upper punch (1) and the lower punch (3) are at the set positions, the distance between the hole forming part (5) and the boss (6) is L, and L is more than or equal to 0.01mm and less than or equal to 0.02mm.
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| CN114042915B (en) * | 2021-11-22 | 2024-01-02 | 株洲钻石切削刀具股份有限公司 | Forming device and forming method for non-round hole alloy blade |
| CN114472887B (en) * | 2021-12-30 | 2024-07-02 | 山东大学 | Forming die and forming method for blades with multiple powder structures in circumferential direction |
| CN114472886A (en) * | 2021-12-30 | 2022-05-13 | 株洲钻石切削刀具股份有限公司 | Forming die and forming method for blade with multi-powder structure inside and outside |
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| US4456445A (en) * | 1982-02-23 | 1984-06-26 | Ptx-Pentronix, Inc. | Mounting structure for die, punch and core rod assembly for compacting powder material |
| JP3884140B2 (en) * | 1997-09-22 | 2007-02-21 | インターメタリックス株式会社 | Powder compression molding equipment |
| CN109277565B (en) * | 2018-11-20 | 2021-02-26 | 株洲钻石切削刀具股份有限公司 | Powder forming device and forming method |
| CN212121654U (en) * | 2020-11-13 | 2020-12-11 | 宁波新宇硬质合金密封有限公司 | Plough-shaped sheet powder metallurgy die |
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