CN113084160A - Alloy blade forming device and forming method thereof - Google Patents
Alloy blade forming device and forming method thereof Download PDFInfo
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- CN113084160A CN113084160A CN202110367851.XA CN202110367851A CN113084160A CN 113084160 A CN113084160 A CN 113084160A CN 202110367851 A CN202110367851 A CN 202110367851A CN 113084160 A CN113084160 A CN 113084160A
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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 passing hole for the round core rod to pass through is arranged at 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. Also discloses a forming method of the alloy blade forming device, which comprises the following steps: a filler; pressing; and (6) demolding. The alloy blade forming device and the forming method thereof have the advantages of simple structure and convenient operation, can prolong the service life, can ensure the product quality and can form the alloy blade with the polygonal central positioning hole.
Description
Technical Field
The invention relates to the technical field of powder metallurgy, in particular to an alloy blade forming device and a forming method thereof.
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 positioning hole which is usually a round hole; however, the hole type of the non-circular clamping screw hole is polygonal, and the non-circular clamping screw hole is characterized in that the multi-constraint over-positioning multi-directional clamping of the fastening screw and the central hole of the cutting blade can be realized, the unfavorable deformation of the fastening piece is effectively controlled, and the service life of the cutter is prolonged. Generally, the alloy blade is molded by adopting a die device consisting of a die body, an upper punch, a lower punch and a round core rod, wherein the upper punch comprises an inner punch which is of a round solid structure; and at the beginning stage of the forming period, the die body is static, the round core rod enters the die cavity hole and is flush with the top surface of the die body, powder is 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 to finish the forming of a pressed compact. Because the structures of the inner punch and the core rod of the section die device are round, the formed positioning hole is a round hole, and a polygonal hole pattern cannot be formed.
If the die device for forming the polygonal hole pattern adopts the polygonal inner punch, the fit clearance is ensured between the lower punch through hole and the core rod, and the fit clearance is also ensured between the polygonal inner punch and the lower punch through hole, so that the burrs at the clamping hole pattern of the blade are small, and powder does not leak when filling; the corresponding lower punch through hole and the core rod are required to be polygonal, and the shape of the lower punch through hole and the core rod is ensured to be consistent with the shape of the hole of the polygonal inner punch, but the method has the main problems that the polygonal core rod 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 in the die device, the direction of accurate positioning in the lower punch through hole cannot be realized, so that the product quality and the service life of the die cannot be ensured.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an alloy blade forming device which is simple in structure, convenient to operate, capable of prolonging the service life, ensuring the product quality and forming an alloy blade with a polygonal central positioning hole.
Further provides a forming method of the alloy blade forming device, which can prolong the service life of the device, ensure the product quality and form the alloy blade with the polygonal central 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 pole that from top to bottom sets gradually, the die body center runs through there is the die cavity hole, the bottom of upper punch is equipped with and is polygonal one-tenth pore portion, the center of upper punch is equipped with the last mating holes with round core pole adaptation, go up the mating holes 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 the lower hole of passing that supplies round core pole to pass, the top of passing the hole down be equipped with the lower cooperation section of round core pole adaptation.
As a further improvement of the above technical solution:
the external dimension of the top surface of the boss is the same as the external dimension 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, the alpha is more than or equal to 30 degrees and less than or equal to 45 degrees, the height of the boss is set as H1, and the H1 is more than or equal to 0.1mm and less than or equal to 0.2 mm.
And an upper passing hole for the round core rod to pass through is formed in the center of the upper punch above the upper matching hole.
The die cavity hole comprises an upper punching section for inserting the upper punch, a lower punching section for inserting the lower punch 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 set to be beta, wherein 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 diameter of the minimum inscribed circle of the top surface of the boss is set to be D2, and D1-D2 are more than or equal to 0.3mm and less than or equal to 0.5 mm.
The diameter of the round core rod is set to be D1, the diameter of the lower matching section is set to be D3, the diameter is not less than 0.01mm and not more than D3-D1 and not more than 0.02mm, the height of the lower matching section is set to be H1, and the diameter is not less than 8mm and not more than H1 and not more than 15 mm.
The diameter of the round core rod is D1, the diameter of the upper matching hole is D4, the diameter of the upper matching hole is D4-D1 and is not more than 0.03mm, the height of the upper matching hole is H2, the height of the hole forming part is H3, and the diameter of the hole forming part is not less than 5mm and is not more than H2-H3 and is not more than 10 mm.
The forming method of the alloy blade forming device comprises the following steps:
s1) filler: the lower punch moves upwards into a die cavity hole of the die body, the round core rod moves upwards into 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 rod are kept fixed, the upper punch and the lower punch move oppositely to reach a set position for pressing, and 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 compact and the lower punch synchronously ascend until the alloy compact is moved out of the die cavity hole, then the upper punch continuously ascends to separate the alloy compact from the upper punch or the lower punch, and then the alloy compact is taken out.
As a further improvement of the above technical solution:
in step S2, the fit clearance between the upper punch and the die hole is set to W1, W1 is greater than or equal to 0.005mm and less than or equal to 0.025mm, the fit clearance between the lower punch and the die hole is set to W2, W2 is greater 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 position, the distance between the hole forming portion and the boss is set to L, and L is greater than or equal to 0.01mm and less than or equal to 0.02 mm.
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 the upper punch, a polygonal boss is arranged at the top of the lower punch and corresponds to the hole forming part, and the hole forming part and the boss are attached to each other when the upper punch and the lower punch move in opposite directions to reach a pressed set position and are used for forming a polygonal positioning hole in the center of the alloy blade. Because the top of passing through the hole down is equipped with the lower cooperation section with circle core rod adaptation, circle core rod and cooperation section adaptation down, can prevent the process at the punching press, the powder is from the clearance blowout between circle core rod and the cooperation section down, because the center of last drift is equipped with the last mating holes with circle core rod adaptation, go up the mating holes and run through in the center of pore-forming portion, in-process that the drift moved down in the die cavity hole when last drift, circle core rod and last mating holes cooperation, can prevent that the powder from the clearance blowout between circle core rod and the last mating holes, and, circle core rod has the guide effect to last punch, can prevent that the punch from taking place off-centre under the motion process, thereby can do high life, and can guarantee product quality. The alloy blade forming device is simple in structure and convenient to operate, can prolong the service life, can ensure the product quality and can form the alloy blade with the polygonal central positioning hole.
2. According to the forming method of the alloy blade forming device, the alloy pressed blank is formed by punching the upper punch and the lower punch in the die cavity hole through relative movement, the polygonal central positioning hole in the center of the alloy pressed blank is formed by matching the boss with the hole forming part, and the product quality can be guaranteed. Because the top of passing through the hole down is equipped with the lower cooperation section with circle core rod adaptation, circle core rod and cooperation section adaptation down, can prevent the process at the punching press, the powder is from the clearance blowout between circle core rod and the cooperation section down, because the center of last drift is equipped with the last mating holes with circle core rod adaptation, go up the mating holes and run through in the center of pore-forming portion, in-process that the drift moved down in the die cavity hole when last drift, circle core rod and last mating holes cooperation, can prevent that the powder from the clearance blowout between circle core rod and the last mating holes, and, circle core rod has the guide effect to last punch, can prevent that the punch from taking place off-centre under the motion process, thereby can do high 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 central positioning hole.
Drawings
FIG. 1 is a view showing a state of construction 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 according to the present invention.
Fig. 4 is a schematic sectional view of the line B-B in fig. 3.
Fig. 5 is a schematic structural view of an 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 sectional view taken along line E-E of fig. 7.
Fig. 9 is an enlarged view at F in fig. 8.
FIG. 10 is a schematic view showing the structure of a hole forming part of the alloy blade forming apparatus of the present invention.
Fig. 11 is a schematic structural view of a round bar of the alloy blade forming apparatus of the present invention.
Fig. 12 is a schematic structural view of an alloy compact formed by the alloy blade forming apparatus of the present invention.
Fig. 13 is a schematic sectional view of the line G-G in fig. 12.
The reference numerals in the figures denote:
1. an upper punch; 11. an upper mating hole; 12. an upper through hole; 2. a mold body; 21. a cavity bore; 211. an upper stamping section; 212. a lower stamping section; 213. a profiling section; 3. a lower punch; 4. a round core bar; 5. a hole forming part; 6. a boss; 7. a lower through hole; 71. a lower mating section; 8. demoulding surface; 9. and (5) alloy compaction.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
The first embodiment is as follows:
fig. 1 to 13 show an embodiment of the alloy blade forming device of the present invention, which includes an upper punch 1, a die body 2, a lower punch 3 and a round core rod 4, which are sequentially arranged from top to bottom, wherein a die cavity hole 21 penetrates through the center of the die body 2, a polygonal hole forming portion 5 is arranged at the bottom of the upper punch 1, an upper matching hole 11 adapted to the round core rod 4 is arranged 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 arranged at the top of the lower punch 3, a lower through hole 7 for the round core rod 4 to pass through is arranged 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 arranged at the top of the lower through hole 7.
The forming process of the alloy blade forming device to the alloy blade comprises the following steps: firstly, moving a lower punch 3 upwards into a die cavity hole 21 for inserting into a die body 2, moving a round core rod 4 upwards into the die cavity hole 21 along a lower through hole 7 of the lower punch 3, and enabling the top surface of the round core rod 4 to be lower than the top surface of the die body 2, wherein at the moment, 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 rod 4 are kept fixed, the upper punch 1 moves downwards and is inserted into the die cavity hole 21, meanwhile, the lower punch 3 moves upwards, the upper punch 1 and the lower punch 3 move oppositely to achieve the purpose of powder extrusion forming, and when the upper punch 1 and the lower punch 3 move oppositely to reach the set position of pressing, powder between the upper punch 1 and the lower punch 3 is extruded to form an alloy pressed compact 9; then, synchronously raising the upper punch 1, the alloy compact 9 and the lower punch 3 until the alloy compact 9 is moved out of the die cavity hole 21, then, continuously raising the upper punch 1 to separate the alloy compact 9 from the upper punch 1 or the lower punch 3 so as to achieve the purpose of demoulding, and then taking out the alloy compact 9; finally, the upper punch 1 and the lower punch 3 respectively return to the initial positions, and after the next alloy compact 9 is formed by punching, the alloy compact 9 can be formed into an alloy blade after being further ground in other equipment. 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 set position for pressing, the hole forming part 5 is attached to the boss 6 and used for forming a polygonal positioning hole in the center of the alloy blade. Because the top of lower through hole 7 is equipped with the lower cooperation section 71 with round core rod 4 adaptation, round core rod 4 and lower cooperation section 71 adaptation, can prevent at the process of punching press, the powder is from the clearance blowout between round core rod 4 and the lower cooperation section 71, because the center of upper punch 1 is equipped with the last mating holes 11 with round core rod 4 adaptation, go up mating holes 11 and run through in the center of pore-forming portion 5, in-process that upper punch 1 moves down in die cavity hole 21, round core rod 4 cooperates with last mating holes 11, can prevent that the powder from the clearance blowout between round core rod 4 and last mating holes 11, and, round core rod 4 has the guide effect to upper punch 1, can prevent that upper punch 1 from taking place the off-centre at the motion process of pushing down, thereby can make high life, and can guarantee product quality. The alloy blade forming device is simple in structure and convenient to operate, can prolong the service life, can ensure the product quality and can form the alloy blade with the polygonal central positioning hole.
This alloy blade forming device can be on the basis that does not change original press die carrier anchor clamps structure, keep original forming device manufacture craft unchangeable, only through changing the shaping that mould device structure (the relative structure of upper punch 1 and lower punch 3, the structure of die cavity hole 21 in die body 2 center) realized alloy blade polygon pass, and can also reach the relatively even of guaranteeing the powder packing, realize that forming device makes simply, the accurate efficient purpose of clamping adjustment, the problem of must adopting polygon core bar and pore-forming portion 5 complex has been solved.
In the embodiment, the external dimension of the top surface of the boss 6 is the same as the external 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, the 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, and H1 is more than or equal to 0.1mm and less than or equal to 0.2 mm. As shown in figure 1, the external dimension of the top surface of the boss 6 is the same as the external dimension of the bottom surface of the hole forming part 5, when the upper punch 1 and the lower punch 3 move oppositely to reach the set position of pressing, the bottom surface of the hole forming part 5 is completely attached to the top surface of the boss 6, the powder around the hole forming part 5 and the boss 6 is guaranteed to be compacted, and the side wall of the polygonal positioning hole at the center of the alloy blade formed by the hole forming part 5 and the boss 6 is guaranteed not to be smooth and not to be out of the platform. The arrangement of the polygonal boss 6 solves the problem that the polygonal core rod is matched with the hole forming part 5. Set up polygon boss 6 at the top center of lower punch 3, preparation simple process, with low costs, precision height to, because the existence of boss 6, in the press forming process, the side of boss 6 has the guide effect to the removal of powder, thereby can prevent to form the powder layer between boss 6 and pore-forming portion 5, improve product quality. As shown in FIG. 9, the side surface of the boss 6 forms an included angle α with the central axis of the boss 6, where α is greater than or equal to 30 ° and less than or equal to 45 °, and at this time, the side surface of the boss 6 has a good guiding effect on the powder, and α is preferably 45 °, 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 passing hole 12 through which the round core rod 4 passes is provided above the upper fitting hole 11 at the center of the upper punch 1. The top of the upper fitting hole 11 is prevented from colliding with the round core rod 4 during downward movement of the upper punch 1.
In the present embodiment, as shown in fig. 4, the die cavity 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 forming the alloy blade, and the profiling section 213 communicates between the upper punch section 211 and the lower punch section 212. The forming process of the alloy blade forming device to the alloy blade comprises the following steps: firstly, moving the lower punch 3 upwards into the lower punching section 212, moving the round core rod 4 upwards into the die cavity hole 21 along the lower through hole 7 of the lower punch 3, and making the top surface of the round core rod 4 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 for powder filling; then, the die body 2 and the round core rod 4 are kept fixed, the upper punch 1 moves downwards and is inserted into the upper punching section 211, meanwhile, the lower punch 3 moves upwards, the upper punch 1 and the lower punch 3 move towards each other, and the purpose of powder extrusion forming is achieved, when the upper punch 1 and the lower punch 3 move towards each other and reach a set pressing position (when the position is reached, 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, and the bottom surface of the hole forming part 5 is attached to the top surface of the boss 6), the powder between the upper punch 1 and the lower punch 3 is extruded in the profiling section 213, and an alloy compact 9 is formed; and then, synchronously lifting the upper punch 1, the alloy compact 9 and the lower punch 3 until the alloy compact 9 is moved out of the die cavity hole 21, then continuously lifting the upper punch 1 to separate the alloy compact 9 from the upper punch 1 or the lower punch 3 so as to achieve the purpose of demoulding, and then taking out the alloy compact 9. 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 fitting clearance between the upper punch 1 and the upper punch section 211 of the die cavity hole 21 is set to W1, W1 satisfies the relationship of 0.005mm or more and W1 or more and 0.025 or less, ejection of powder from the clearance between the upper punch 1 and the upper punch section 211 of the die cavity hole 21 is prevented, and preferably, W1 is 0.01mm, the fitting clearance between the lower punch 3 and the lower punch section 212 of the die cavity hole 21 is set to W2, W2 satisfies the relationship of 0.005mm or more and W2 or less and 0.015mm, ejection of powder from the clearance between the lower punch 3 and the lower punch section 212 of the die cavity hole 21 is prevented, and preferably, W2 is 0.01mm, and when the upper punch 1 and the lower punch 3 are at the set positions, the distance between the bottom surface of the pore-forming part 5 and the top surface of the boss 6 is set to be L, so that L satisfies the relation that L is more than or equal to 0.01mm and less than or equal to 0.02mm, and a powder layer is prevented from being formed between the bottom surface of the pore-forming part 5 and the top surface of the boss 6, so that the product quality is improved.
In the present 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 ' β ≦ 60 ', and the inclination angle β of the release surface 8 is set in this range, so that the release effect is good, and most preferably, when β ≦ 50 ', the release effect is best.
In this embodiment, as shown in fig. 10 and 11, the diameter (peripheral diameter) of the round core rod 4 is D1, the top surface of the boss 6 is polygonal, the diameter of the minimum inscribed circle thereof is D2, and D1-D2 are no more than 0.3mm and no more than 0.5mm, so that the top end of the boss 6 has a certain thickness to ensure the strength of the boss 6, during the powder filling process, no powder is filled between the round core rod 4 and the lower matching section 71 to achieve the effect of profile modeling filler, and to ensure that the density of the periphery of the central positioning hole of the alloy green compact 9 is relatively uniform during the molding. Most preferably, D1-D2 is 0.4 mm.
In the present 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 engagement section 71 is D3, 0.01mm or less and D3-D1 or less and 0.02mm or less, and the height of the lower engagement section 71 is H1, 8mm or less and H1 or less and 15mm, so that the ejection of powder from the gap between the round core rod 4 and the lower engagement section 71 can be prevented well, and most preferably, D3-D1 is 0.01mm, and H1 is 10 mm.
In the present embodiment, as shown in fig. 6 and 11, the diameter of the round core rod 4 is D1, the diameter of the upper fitting hole 11 is D4, the diameter of D4-D1 is 0.03mm or less, the height of the upper fitting hole 11 is H2, the height of the hole forming portion 5 is H3, and the diameter of H2-H3 is 10mm or less, respectively, which are 0.02mm or less, preferably, D4-D1 is 0.03mm and H2-H3 is 10mm, respectively.
Example two:
a forming method of the alloy blade forming device comprises the following steps:
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 that of the die body 2, and a powder filling cavity is formed in the die cavity hole 21 of the die body 2 at the moment for powder filling;
s2) pressing: the die body 2 and the round core rod 4 are kept fixed, the upper punch 1 and the lower punch 3 move oppositely to reach a set position for pressing, and 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 compact 9 and the lower punch 3 are synchronously lifted until the alloy compact 9 is removed from the die cavity hole 21, then the upper punch 1 is lifted 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 blank 9 is formed by punching the upper punch 1 and the lower punch 3 in the die cavity hole 21 in a relative motion mode, the polygonal central positioning hole in the center of the alloy pressed blank 9 is formed by matching the boss 6 with the hole forming part 5, and the product quality can be guaranteed. Because the top of lower through hole 7 is equipped with the lower cooperation section 71 with round core rod 4 adaptation, round core rod 4 and lower cooperation section 71 adaptation, can prevent at the process of punching press, the powder is from the clearance blowout between round core rod 4 and the lower cooperation section 71, because the center of upper punch 1 is equipped with the last mating holes 11 with round core rod 4 adaptation, go up mating holes 11 and run through in the center of pore-forming portion 5, in-process that upper punch 1 moves down in die cavity hole 21, round core rod 4 cooperates with last mating holes 11, can prevent that the powder from the clearance blowout between round core rod 4 and last mating holes 11, and, round core rod 4 has the guide effect to upper punch 1, can prevent that upper punch 1 from taking place the off-centre at the motion process of pushing down, thereby can make high 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 central positioning hole.
In this embodiment, in step S2, the fit clearance between the upper punch 1 and the die hole 21 is set to be W1, W1 is greater 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 hole 21 is set to be W2, W2 is greater than or equal to 0.005mm and less than or equal to 0.015mm, when the upper punch 1 and the lower punch 3 are at the set positions, the distance between the hole-forming portion 5 and the boss 6 is set to be L, and L is greater than or equal to 0.01mm and less than or equal to 0.. 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 fitting clearance between the upper punch 1 and the upper pressing section 211 of the die hole 21 is set to W1, W1 satisfies the relationship 0.005mm or more and W1 or more and 0.025 or less, ejection of powder from the clearance between the upper punch 1 and the upper pressing section 211 of the die hole 21 can be prevented, most preferably, W1 is 0.01mm and the fitting clearance between the lower punch 3 and the lower pressing section 212 of the die hole 21 is set to W2 and W2 satisfies the relationship 0.005mm or more and W2 or less and 0.015mm, ejection of powder from the clearance between the lower punch 3 and the lower pressing section 212 of the die hole 21 can be prevented, most preferably, W2 is 0.01mm and when the upper punch 1 and the lower punch 3 are in a set position, the distance between the bottom surface of the hole-forming portion of the hole 5 and the top surface of the boss 6 is set to L and the boss of the boss can be prevented from being formed between the powder layer and the top surface of the boss 6, to improve the product quality.
The specific forming process of the alloy blade by the alloy blade forming device comprises the following steps: firstly, moving the lower punch 3 upwards into the lower punching section 212, moving the round core rod 4 upwards into the die cavity hole 21 along the lower through hole 7 of the lower punch 3, and making the top surface of the round core rod 4 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 for powder filling; then, the die body 2 and the round core rod 4 are kept fixed, the upper punch 1 moves downwards and is inserted into the upper punching section 211, meanwhile, the lower punch 3 moves upwards, the upper punch 1 and the lower punch 3 move towards each other, and the purpose of powder extrusion forming is achieved, when the upper punch 1 and the lower punch 3 move towards each other and reach a set pressing position (when the position is reached, 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, and the bottom surface of the hole forming part 5 is attached to the top surface of the boss 6), the powder between the upper punch 1 and the lower punch 3 is extruded in the profiling section 213, and an alloy compact 9 is formed; then, synchronously raising the upper punch 1, the alloy compact 9 and the lower punch 3 until the alloy compact 9 is moved out of the die cavity hole 21, then, continuously raising the upper punch 1 to separate the alloy compact 9 from the upper punch 1 or the lower punch 3 so as to achieve the purpose of demoulding, and then taking out the alloy compact 9; and finally, respectively returning the upper punch 1 and the lower punch 3 to the initial positions, and repeating the steps after the next alloy pressed blank 9 is subjected to punch forming to perform the next press forming. The alloy compact 9 can be formed into an alloy blade after further grinding in other equipment.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (10)
1. The utility model provides an alloy blade forming device, includes top punch (1), die body (2), lower punch (3) and round core pole (4) that from top to bottom set gradually, die body (2) center is run through has die cavity hole (21), its characterized in that: the punching die is characterized in that a polygonal hole forming part (5) is arranged at the bottom of the upper punch (1), an upper matching hole (11) matched with the round core rod (4) is formed in the center of the upper punch (1), the upper matching hole (11) penetrates through the center of the hole forming part (5), a boss (6) corresponding to the hole forming part (5) is arranged at the top of the lower punch (3), a lower passing hole (7) for the round core rod (4) to pass through is formed in the centers of the lower punch (3) and the boss (6), and a lower matching section (71) matched with the round core rod (4) is arranged at the top of the lower passing hole (7).
2. The alloy blade forming apparatus according to claim 1, wherein: the external dimension of the top surface of the boss (6) is the same as the external 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 shaft 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 set to be H1, and H1 is more than or equal to 0.1mm and less than or equal to 0.2 mm.
3. The alloy blade forming apparatus according to claim 1, wherein: an upper passing hole (12) for the round core rod (4) to pass through is formed in the center of the upper punch (1) above the upper matching hole (11).
4. The alloy blade forming apparatus according to claim 1, wherein: the die cavity hole (21) comprises an upper punching section (211) for inserting the upper punch (1), a lower punching section (212) for inserting the lower punch (3) and a profiling section (213) for forming the alloy blade, wherein the profiling section (213) is communicated between the upper punching section (211) and the lower punching section (212).
5. 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 set to be beta, wherein beta is more than or equal to 45 'and less than or equal to 60'.
6. The alloy blade forming apparatus according to any one of claims 1 to 5, wherein: the diameter of the round core rod (4) is set to be D1, the diameter of the minimum inscribed circle of the top surface of the boss (6) is set to be D2, and D1-D2 are more than or equal to 0.3mm and less than or equal to 0.5 mm.
7. The alloy blade forming apparatus according to any one of claims 1 to 5, wherein: the diameter of the round core rod (4) is set to be D1, the diameter of the lower matching section (71) is set to be D3, the diameter is not less than 0.01mm and not more than D3-D1 and not more than 0.02mm, the height of the lower matching section (71) is set to be H1, and the diameter is not less than 8mm and not more than H1 and not more than 15 mm.
8. The alloy blade forming apparatus according to any one of claims 1 to 5, wherein: the diameter of the round core rod (4) is set to be D1, the diameter of the upper matching hole (11) is set to be D4, the diameter is not less than 0.02mm and not more than D4-D1 and not more than 0.03mm, the height of the upper matching hole (11) is set to be H2, the height of the hole forming part (5) is set to be H3, and the diameter is not less than 5mm and not more than H2-H3 and not more than 10 mm.
9. A method of forming an alloy blade forming apparatus according to any one of claims 1 to 8, 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) and enables the top surface of the round core rod (4) to be 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 rod (4) are kept fixed, the upper punch (1) and the lower punch (3) move oppositely to reach a set position for pressing, and powder between the upper punch (1) and the lower punch (3) is extruded to form an alloy compact (9);
s3) demolding: firstly, the upper punch (1), the alloy compact (9) and the lower punch (3) synchronously ascend until the alloy compact (9) is removed from the die cavity hole (21), then the upper punch (1) continuously ascends 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.
10. The method of forming an alloy blade forming apparatus according to claim 9, wherein: in the step S2, the fit clearance between the upper punch (1) and the die cavity hole (21) is set to be W1, 0.005mm is equal to or less than W1 and equal to or less than 0.025mm, the fit clearance between the lower punch (3) and the die cavity hole (21) is set to be W2, 0.005mm is equal to or less than W2 and equal to or less than 0.015mm, and when the upper punch (1) and the lower punch (3) are at the set position, the distance between the hole forming portion (5) and the boss (6) is set to be L, and L is equal to or less than 0.01mm and equal to or less than 0.02 mm.
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| CN114042915A (en) * | 2021-11-22 | 2022-02-15 | 株洲钻石切削刀具股份有限公司 | Forming device and forming method for non-circular hole alloy blade |
| CN114082947A (en) * | 2021-10-27 | 2022-02-25 | 株洲钻石切削刀具股份有限公司 | Powder molding apparatus and powder molding method |
| 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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| 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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| CN113084160B (en) | 2023-06-09 |
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