CN109277565B - Powder forming device and forming method - Google Patents
Powder forming device and forming method Download PDFInfo
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- CN109277565B CN109277565B CN201811383589.2A CN201811383589A CN109277565B CN 109277565 B CN109277565 B CN 109277565B CN 201811383589 A CN201811383589 A CN 201811383589A CN 109277565 B CN109277565 B CN 109277565B
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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
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/007—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a plurality of pressing members working in different directions
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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
本发明公开了一种粉末成型装置及成型方法，装置包括模体、上冲头和下冲头，模体设有型腔，模体上端面设有至少两个导向槽，且导向槽与型腔连通，下冲头上设有芯轴且芯轴可贯穿型腔，每个导向槽内插设有一个侧压冲头组件，侧压冲头组件包括上联动滑块、下联动滑块和侧压冲头，上、下联动滑块固定成一个整体，第一侧板位于导向槽外，侧压冲头可移动的插设于上、下联动滑块之间的间隙内，侧压冲头设有两个第二侧板，且第二侧板位于第一侧板的外侧，第一侧板上固定一个连杆，连杆贯穿第二侧板，其上套设一弹性件，各组上联动滑块、侧压冲头和下联动滑块指向型腔的侧型面与下冲头的顶面形成粉末填充腔。方法包括填料、压制和脱模。
The invention discloses a powder molding device and a molding method. The device includes a mold body, an upper punch and a lower punch. The mold body is provided with a cavity, and the upper end face of the mold body is provided with at least two guide grooves, and the guide grooves are connected to the mold body. The cavity is connected, the lower punch is provided with a mandrel and the mandrel can pass through the cavity, and each guide groove is inserted with a side pressure punch assembly, and the side pressure punch assembly includes an upper linkage slider, a lower linkage slider and For the side pressure punch, the upper and lower linkage sliders are fixed as a whole, the first side plate is located outside the guide groove, and the side pressure punch is movably inserted in the gap between the upper and lower linkage sliders. The head is provided with two second side plates, and the second side plates are located on the outer side of the first side plate, a connecting rod is fixed on the first side plate, the connecting rod passes through the second side plate, and an elastic member is sleeved on it, each The upper linkage slider, the side pressure punch and the lower linkage slider point to the side profile of the cavity and the top surface of the lower punch to form a powder filling cavity. Methods include packing, pressing and demolding.
Description
Technical Field
The invention relates to the technical field of powder metallurgy, in particular to a powder forming device and a powder forming method.
Background
In the powder metallurgy technology, the powder forming process is the most important process in the production of numerical control blades. Generally, powder molding is performed by using a device consisting of a die body, an upper punch, a lower punch and a core rod. The device makes the powder compact by the force exerted on the powder by the upper punch and the lower punch to form a pressed compact with a certain shape, but the powder density of each area of the pressed compact after forming is different due to the product structure, so that the pressed compact is sintered and deformed, the product precision is not high, and the service performance of the product or the product failure is influenced; at present, the commonly adopted forming process can only aim at the product with a groove-shaped structure in the demoulding direction of the product, but cannot realize the product structure with the groove shape in the direction perpendicular to the demoulding direction, and along with the development of powder metallurgy technology and the development of powder forming equipment technology, a powder forming device with a side pressure function also appears in succession, so that various problems caused by the fact that the product with a complex structure is formed by adopting the powder forming process in the past are better solved.
For example, patent document CN103732386A discloses a green compact manufacturing apparatus having a lateral pressure function, which has an upper punch and a lower punch moving in an axial direction, and a side punch moving in a radial direction, the side punch slidably moving on a die rod, the side punch and the die rod moving in a passage in a base body on which a cover plate is mounted. The device can form a compact with a complex side structure and the density of the compact is uniform, but the forming device has complex parts and structures, a cover plate needs to be removed when powder is filled and the compact is demolded, the structures of an upper punch, a lower punch, a side punch and a die rod have complex matching precision requirements, each part needs an independent power source in the powder forming process, and the forming step is complex.
For example, JP107149A discloses a powder forming apparatus with a lateral pressure function, in which a die body is divided into a main slide and two driven slides, powder is filled or a green body is ejected by radial movement of the three slides, the powder forming pressure is mainly from an upper punch and a lower punch, and the three slides passively apply pressure to the powder, and the apparatus can produce a green body having a groove shape on the side surface thereof but has a certain effect on density improvement of the green body, but the forming and density improvement effects of the green body having a complicated groove shape on the side surface thereof are not significant.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a powder forming device and a powder forming method which are simple in structure, uniform in powder pressing and high in forming efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
a powder forming device comprises a die body, an upper punch and a lower punch, wherein a through cavity is arranged in the middle of the die body, the upper punch and the lower punch can respectively move up and down in the cavity, at least two guide grooves are formed in the upper end face of the die body, the guide grooves are uniformly distributed along the circumferential direction of the die body and are communicated with the cavity, a mandrel is arranged on the lower punch and can penetrate through the cavity, a side pressing punch component is inserted in each guide groove and comprises an upper linkage slide block, a lower linkage slide block and a side pressing punch, the upper linkage slide block and the lower linkage slide block are fixed into a whole through two first side plates, the first side plates are positioned outside the guide grooves, the side pressing punches are movably inserted in gaps between the upper linkage slide block and the lower linkage slide block, the side pressing punches are provided with two second side plates, and the second side plates are positioned outside the first side plates, the powder filling device comprises a first side plate, a second side plate, an elastic piece, a side groove molded surface and a top surface of a lower punch, wherein the first side plate and the second side plate correspond to each other in a one-to-one mode and are parallel to each other, the connecting rod is fixed on the first side plate and penetrates through the second side plate, the elastic piece is sleeved on the connecting rod and is arranged between the first side plate and the second side plate, and the side groove molded surface and the top surface of the lower punch of the directional cavity of the side pressing punch and the lower linkage punch in each.
As a further improvement of the above technical means, it is preferable that the upper interlocking slide, the lower interlocking slide and the lateral pressure punch have the same width in the guide groove, and the sum of the thicknesses of the upper interlocking slide, the lower interlocking slide and the lateral pressure punch is equal to the depth of the guide groove.
As a further improvement of the above technical means, preferably, the side press punch assembly is in clearance fit with the guide groove, and the clearance is W, so as to satisfy: w is more than or equal to 0.005mm and less than or equal to 0.01 mm.
As a further improvement of the above technical solution, preferably, two sides of the guide groove are provided with grooves, and two sides of the lateral pressure punch are provided with projections capable of being matched with the grooves.
As a further improvement of the above technical solution, preferably, the outer surface of the die body is provided with a stop plane abutting against the first side plate.
As a further improvement of the above technical solution, it is preferable that the thickness of the upper interlocking slide is H1, and satisfies: h1 is more than or equal to 1.5mm and less than or equal to 2.5 mm.
A molding method of the powder molding device comprises the following steps:
s1, filler: the upper punch moves to the upper part of the cavity, the side pressure punch component moves to be close to the cavity along the guide groove until the first side plate abuts against the die body, the lower punch extends into the cavity and is close to the lower linkage slide block, and at the moment, the upper linkage slide block, the side pressure punch and the lower linkage slide block of each group point to the side groove molded surface of the cavity and the top surface of the lower punch to form a powder filling cavity in the cavity for powder filling;
s2, pressing: the upper punch and the lower punch move oppositely to reach a set position for pressing, the side pressure punches move towards the center of the cavity to reach the set position for pressing, and the powder is extruded together to be formed and a pressed compact is formed;
s3, demolding: and the side press punches retreat in the direction away from the cavity, then the upper punch, the compact and the lower punch are lifted together to leave the cavity, the upper punch continues to ascend and leave the compact, the compact is taken out, and then the upper punch and the lower punch respectively return to the initial positions.
As a further improvement of the above technical solution:
in step S1, the lower punch is moved to a position below the upper end surface of the lower link slider at the initial position, and the height difference between the lower punch and the upper end surface of the lower link slider in the vertical direction is H2, so that the following conditions are satisfied: h2 is more than or equal to 1.5mm and less than or equal to 2.5 mm;
in order to solve the technical problem, the invention adopts the following other technical scheme:
a powder forming device comprises a die body, an upper punch and a lower punch, wherein the upper punch and the lower punch can respectively move up and down along the axis of the die body, at least three guide grooves are formed in the upper end face of the die body, the guide grooves are uniformly distributed along the circumferential direction of the die body, a mandrel is arranged on the lower punch and can penetrate through the die body, a side pressing punch component is inserted in each guide groove and comprises an upper linkage slide block, a lower linkage slide block and side pressing punches, the upper linkage slide block and the lower linkage slide block are fixed into a whole through two first side plates, the first side plates are positioned outside the guide grooves, the side pressing punches are movably inserted in a gap between the upper linkage slide block and the lower linkage slide block, the side pressing punches are provided with two second side plates which are positioned outside the first side plates, the first side plates and the second side plates are in one-to-one correspondence and parallel with each other, the powder filling device is characterized in that a connecting rod is fixed on the first side plate and penetrates through the second side plate, an elastic piece is sleeved on the connecting rod and arranged between the first side plate and the second side plate, and a powder filling cavity is formed between the axial side groove molded surface of the directional die body of each group of the upper linkage slide block, the side pressing punch and the lower linkage slide block and the top surface of the lower punch.
Compared with the prior art, the invention has the advantages that:
the powder forming device can simultaneously press the upper part, the lower part and the periphery of a product, greatly improves the forming density of each area of a pressed blank and ensures the size precision of the product; the side pressure punch assembly can realize the motion action required by the upper and lower linkage sliders and the side pressure punch only by one power source so as to realize the active pressing of the side punch and the sufficient space for the side punch to drive the linkage sliders to return, so that a pressed blank can be smoothly ejected and demoulded, the pressing efficiency and the product quality are greatly improved, and the side pressure punch assembly is only provided with the upper punch, the lower punch, the side pressure punch assembly and a die body, has a simple structure and is easy to operate in a forming method.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention.
FIG. 2 is a schematic structural diagram of a mold body according to embodiment 1 of the present invention.
FIG. 3 is a schematic view of the structure of a side pressure punch assembly in embodiment 1 of the present invention.
Fig. 4 is a schematic structural view of the upper and lower interlocking blocks in embodiment 1 of the present invention.
FIG. 5 is a schematic view of the structure of a side pressure punch in example 1 of the present invention.
Fig. 6 is a diagram showing the positions of the members before mold clamping in embodiment 1 of the present invention.
FIG. 7 is a graph showing the results of the matched-mold pressing in example 1 of the present invention.
FIG. 8 is a schematic view showing the demolding process in example 1 of the present invention.
Fig. 9 is a schematic view of the arrangement between the side pressure punch assembly and the die body in embodiment 2 of the present invention.
The reference numerals in the figures denote:
100. a mold body; 101. a stop plane; 110. a cavity; 120. a guide groove; 121. a groove; 200. an upper punch; 300. a lower punch; 400. a mandrel; 500. laterally pressing the punch assembly; 501. a first side plate; 502. a second side plate; 503. a connecting rod; 504. an elastic member; 505. a threaded hole; 506. a through hole; 510. an upper linkage slider; 520. laterally pressing the punch; 521. a bump; 530. a lower linkage slider; 600. filling the cavity with powder; 700. and (5) compacting.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
Example 1
As shown in fig. 1 to 5, the powder forming apparatus of this embodiment includes a die body 100, an upper punch 200 and a lower punch 300, a through cavity 110 is disposed in the middle of the die body 100, the upper punch 200 and the lower punch 300 can move up and down in the cavity 110, respectively, two guide slots 120 are disposed on the upper end surface of the die body 100, the two guide slots 120 are disposed at 180 ° along the die body 100, the guide slots 120 communicate with the cavity 110, a mandrel 400 is disposed on the lower punch 300, the mandrel 400 can penetrate through the cavity 110, a lateral press punch assembly 500 is inserted into each guide slot 120, the lateral press punch assembly 500 includes an upper link slider 510, a lower link slider 530 and a lateral press punch 520, the upper link slider 510 and the lower link slider 530 are fixed as a whole by two first side plates 501, the first side plates 501 are disposed outside the guide slots 120, the lateral press punch 520 is inserted into a gap between the upper link slider 510 and the lower link slider 530, the side pressure punch 520 is provided with two second side plates 502, the second side plates 502 are located on the outer sides of the first side plates 501, the first side plates 501 and the second side plates 502 correspond to each other one by one and are parallel to each other, a connecting rod 503 is fixed on the first side plates 501, the connecting rod 503 penetrates through the second side plates 502, an elastic piece 504 is sleeved on the connecting rod 503, the elastic piece 504 is arranged between the first side plates 501 and the second side plates 502, and the side groove profiles of the upper linkage slide block 510, the side pressure punch 520 and the lower linkage slide block 530 pointing to the cavity 110 and the top surface of the lower punch 300 in each group form a powder filling cavity 600 in the cavity 110.
As shown in fig. 6, which is a schematic view showing the forming apparatus in place before pressing, the upper and lower punches are moved toward each other and the side punches are moved inward at the time of pressing, and the result of pressing is shown in fig. 7. And (3) demoulding after pressing is finished, as shown in fig. 8, the side pressure punch 520 retreats outwards and drives the upper linkage slide block 510 and the lower linkage slide block 520 to retreat together, the side pressure punch leaves the pressed blank 700, the upper punch and the lower punch ascend together with the pressed blank, the pressed blank 700 is taken out, and finally the upper punch and the lower punch return respectively. The important point of the present invention is the structure of the side press punch assembly 500, the upper linkage slide 510 and the lower linkage slide 520 are fixed together and can advance or retreat simultaneously, the side press punch 520 is movable relative to the upper linkage slide 510 and the lower linkage slide 530, and the side press punch 520 and each linkage slide are connected into a whole through the elastic piece 504, when the side press punch 520 presses the powder, the side press punch is not affected by each linkage slide, and the elastic piece 504 enables the first side plate 501 to be pressed on the die body 100, so that the gap between the upper linkage slide 510 and the side wall of the upper punch 200 and the gap between the lower linkage slide 530 and the side wall of the lower punch 300 are ensured, and the material leakage during the filling and the material spraying during the pressing forming are prevented. During demolding, the side pressure punch 520 can drive the upper and lower linkage sliders to leave the green compact 700, the structural design ensures that the side pressure punch drives the upper and lower linkage sliders to move, power sources are reduced, cost is reduced, and movement stability is ensured. The forming device can simultaneously press the upper part, the lower part and the periphery of a product, greatly improves the forming density of each area of a pressed blank and ensures the dimensional precision of the product; the side pressure punch assembly can realize the motion action required by the upper and lower linkage sliders and the side pressure punch 520 only by one power source so as to realize the active pressing of the side pressure punch 520 and the sufficient space for the side pressure punch to drive the linkage sliders to return, so that a pressed compact can be smoothly ejected and demoulded, the pressing efficiency and the product quality are greatly improved, and the side pressure punch assembly only comprises an upper punch, a lower punch, the side pressure punch assembly and a die body, and is simple in structure and easy to operate.
In this embodiment, the mandrel 400 is provided to ensure the formation of the center hole of the green compact 700. The elastic member 504 is embodied as a spring. Wherein the upper punch 200, the lower punch 300 and the lateral press punch 520 are provided with separate driving powers (not shown in the figure).
In this embodiment, the widths of the upper interlocking slide 510, the lower interlocking slide 530, and the lateral pressure punch 520 in the guide groove 120 are the same, and the sum of the thicknesses of the three is the same as the depth of the guide groove 120. During die assembly, the side groove profiles of the upper and lower interlocking slides 510, 530 and the side press punch 520 are engaged with each other, so that the pressed compact 700 has a continuous smooth surface.
In this embodiment, the lateral pressure punch assembly 500 is in clearance fit with the guide groove 120, the clearance is W, and W can be any value (including two end values) within 0.005mm to 0.01mm, in this embodiment, the value of W is 0.005mm to reduce the powder flowing into the clearance between the upper linkage slider 510 and the guide groove 120 as much as possible, so as to avoid the occurrence of the die sticking phenomenon, and facilitate easy movement of the lateral pressure punch assembly 500.
In this embodiment, the upper linkage slider 510 and the lower linkage slider 520 may be connected into a whole through two first side plates 501, a threaded hole 505 is formed in each first side plate 501, a through hole 506 is formed in each second side plate 502, the connecting rod 503 is a bolt, the bolt passes through the through hole 506 and is connected with the threaded hole 505, the spring is sleeved on the bolt, and the sleeved portion of the spring is not threaded, so that the second side plate 502 moves on the bolt. In addition to the embodiment, the upper linkage slider 510, the lower linkage slider 520, and the first side plate 501 may be integrally formed.
In this embodiment, the grooves 121 are disposed on two sides of the guide groove 120, and the protrusions 521 that can be engaged with the grooves 121 are disposed on two sides of the side press punch 520, so as to prevent the side press punch 520 from being forced to warp during pressing, and ensure the burr width of the green compact 700. The two grooves 121 are positioned at two sides of the cavity 110, and the radial length of the groove 121 does not exceed the distance from the center of the cavity 110 to the circumference of the die body 100, so that the groove 121 does not penetrate through the cavity 110, and the cavity 100 has enough extrusion surface for pressing the green compact 700.
In this embodiment, the outer surface of the die body 100 is provided with a stop plane 101 abutting against the first side plate 501, so that the position accuracy of the upper linkage slider 510 and the lower linkage slider 530 during die assembly is ensured, and the die is prevented from being damaged due to collision with an upper punch and a lower punch.
In this embodiment, the thickness of the upper link block 510 is H1, and H1 is any value within 1.5mm to 2.5mm (including two end points). In this way, on the one hand, the strength of the structure is ensured, and on the other hand, the force applied to the lateral pressure punch 520 in the radial direction due to the gradual densification of the powder during pressing is increased, so as to prevent the lateral pressure punch from moving in the opposite direction due to an excessive force, the contact time of the powder with the upper interlocking slide 510 is reduced as much as possible, that is, the thickness is reduced as much as possible while ensuring the strength.
The molding method of the molding device of the invention comprises the following steps:
s1, filler: the upper punch 200 moves to the upper part of the die cavity 110, the side pressure punch assembly 500 moves to be close to the die cavity 110 along the guide groove 120 until the first side plate 501 abuts against the die body 100, the lower punch 300 extends into the die cavity 110 and is close to the lower linkage slider 530, and at the moment, the upper linkage slider 510, the side pressure punch 520 and the lower linkage slider 530 of each group point to the side groove profile of the die cavity 110 and the top surface of the lower punch 300 to form a powder filling cavity 600 in the die cavity 110 for powder filling;
s2, pressing: the upper punch 200 and the lower punch 300 move towards each other to reach a set position for pressing, the side punches 520 move towards the center of the cavity 110 to reach the set position for pressing, and the powder is co-extruded to be molded and a compact 700 is formed;
s3, demolding: the side punches 520 are retreated in a direction away from the cavity 110, and then the upper punch 200, the compact 700, and the lower punch 300 are raised together to be away from the cavity 110, the upper punch 200 is further raised to be away from the compact 700, the compact 700 is taken out, and then the upper punch 200 and the lower punch 300 are returned to their initial positions, respectively.
Repeating the steps and carrying out the next compression molding.
In this embodiment, in step S1, the initial position of the lower punch 300 is that the lower punch 300 moves below the upper end surface of the lower link slider 530, the height difference between the two in the vertical direction is H2, H2 is any value within 1.5mm to 2.5mm, and the value of this embodiment is 1.5 mm. The initial position of the lower punch 300 is the filling position, in the die design, the total height of the filling can be roughly calculated by calculating the single weight of the product, the lower punch 300 moves to the position near the upper end face of the lower linkage slide block 530, the height difference is set to be H2, the reverse direction movement of the lower linkage slide block 530 is avoided when the lower linkage slide block 530 is stressed in the pressing process, and the contact time of the powder and the lower linkage slide block 530 is reduced as much as possible.
In this embodiment, in step S1, the side groove profile of the side press punch 520 is located inside the side groove profile of the lower interlocking slide 530, and the distance difference between the two in the horizontal direction is L, where L is an adjustable value that can be adjusted according to the structure of the green compact 700, so as to ensure the same compression ratio in the upper, lower, and peripheral directions. In this embodiment, when pressed into place (as shown in fig. 6), the driving power applies a certain force to the side press punch 520, so that the elastic member 504 is compressed to a certain extent, and the first side plate 501 is pre-pressed on the die body 100.
In this embodiment, the moving speed and the acting time of the upper punch 200, the lower punch 300 and the lateral pressure punch 520 may be controlled, which is beneficial to adjusting the density uniformity of the compact 700 to ensure the dimensional accuracy of the product.
In addition to the present embodiment, three or more side press punch assemblies 500 may be provided, and two sets of side press punch assemblies 500 are generally used when the mold body has the cavity 110.
Example 2
As shown in fig. 9, the powder molding apparatus of the present embodiment differs from embodiment 1 only in that:
in this embodiment, the die body 100 is not provided with the die cavity 110, the side press punch assemblies 500 are provided in three sets, and the powder filling cavity 600 is directly formed by the side groove profiles of the three sets of side press punch assemblies 500.
The rest of the structure is basically the same as that of the embodiment 1, and the forming method is also the same as that of the embodiment 1, and the description is omitted here.
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 (8)
1. A powder forming device comprises a die body (100), an upper punch (200) and a lower punch (300), wherein a through cavity (110) is arranged in the middle of the die body (100), the upper punch (200) and the lower punch (300) can respectively move up and down in the cavity (110), at least two guide grooves (120) are formed in the upper end face of the die body (100), the guide grooves (120) are uniformly arranged along the circumferential direction of the die body (100), the guide grooves (120) are communicated with the cavity (110), a mandrel (400) is arranged on the lower punch (300), the mandrel (400) can penetrate through the cavity (110), the powder forming device is characterized in that a side pressing punch assembly (500) is inserted in each guide groove (120), each side pressing punch assembly (500) comprises an upper linkage slide block (510), a lower linkage slide block (530) and side pressing punches (520), and the upper linkage slide block (510) and the lower linkage slide block (530) are fixed into a whole through two first side plates (501), the die body is characterized in that the first side plate (501) is located outside the guide groove (120), a stop plane (101) abutted against the first side plate (501) is arranged on the outer surface of the die body (100), the side pressing punch (520) is movably inserted into a gap between the upper linkage slide block (510) and the lower linkage slide block (530), the side pressing punch (520) is provided with two second side plates (502), the second side plates (502) are located on the outer side of the first side plate (501), the first side plate (501) and the second side plates (502) correspond to each other one by one and are parallel to each other, a connecting rod (503) is fixed on the first side plate (501), the connecting rod (503) penetrates through the second side plates (502), an elastic piece (504) is sleeved on the connecting rod (503), the elastic piece (504) is arranged between the first side plate (501) and the second side plate (502), and the upper linkage punch slide block (510), the side pressing profile (520) and the lower linkage slide block (530) in each group point to the side groove of the die cavity (110) and the Forms a powder-filled cavity (600) within the die cavity (110).
2. The powder molding apparatus according to claim 1, wherein the upper interlocking slide (510), the lower interlocking slide (530), and the lateral pressure punch (520) have the same width in the guide groove (120), and the sum of the thicknesses of the three is the same as the depth of the guide groove (120).
3. The powder molding apparatus according to claim 2, wherein the side press punch assembly (500) is clearance-fitted to the guide groove (120) with a clearance W satisfying: w is more than or equal to 0.005mm and less than or equal to 0.01 mm.
4. The powder molding apparatus according to any one of claims 1 to 3, wherein both sides of the guide groove (120) are provided with grooves (121), and both sides of the side press punch (520) are provided with projections (521) engageable with the grooves (121).
5. The powder molding apparatus according to any one of claims 1 to 3, wherein the thickness of the upper interlocking slide (510) is H1, satisfying: h1 is more than or equal to 1.5mm and less than or equal to 2.5 mm.
6. A powder forming device comprises a die body (100), an upper punch (200) and a lower punch (300), wherein the upper punch (200) and the lower punch (300) can respectively move up and down along the axis of the die body (100), at least three guide grooves (120) are formed in the upper end face of the die body (100), the guide grooves (120) are uniformly distributed along the circumferential direction of the die body (100), a mandrel (400) is arranged on the lower punch (300), the mandrel (400) can penetrate through the die body (100), the powder forming device is characterized in that a side press punch assembly (500) is inserted into each guide groove (120), each side press punch assembly (500) comprises an upper linkage slide block (510), a lower linkage slide block (530) and side press punches (520), the upper linkage slide block (510) and the lower linkage slide block (530) are fixed into a whole through two first side plates (501), and the first side plates (501) are positioned outside the guide grooves (120), the outer surface of the die body (100) is provided with a stop plane (101) which is abutted against the first side plate (501), the lateral pressure punch (520) is movably inserted into a gap between the upper linkage slide block (510) and the lower linkage slide block (530), the lateral pressure punch (520) is provided with two second side plates (502), the second side plate (502) is positioned outside the first side plate (501), the first side plate (501) and the second side plate (502) are in one-to-one correspondence and are parallel to each other, a connecting rod (503) is fixed on the first side plate (501), the connecting rod (503) penetrates through the second side plate (502), an elastic piece (504) is sleeved on the connecting rod (503), the elastic piece (504) is arranged between the first side plate (501) and the second side plate (502), and a powder filling cavity (600) is formed among the side groove molded surface of each group of the upper linkage slide block (510), the side pressing punch (520) and the lower linkage slide block (530) pointing to the axial direction of the die body (100) and the top surface of the lower punch (300).
7. A molding method of a powder molding apparatus as claimed in any one of claims 1 to 5, comprising the steps of:
s1, filler: the upper punch (200) moves to the position above the die cavity (110), the side pressure punch assembly (500) moves to be close to the die cavity (110) along the guide groove (120) until the first side plate (501) abuts against the die body (100), the lower punch (300) extends into the die cavity (110) and is close to the lower linkage slider (530), and at the moment, the upper linkage slider (510), the side pressure punch (520) and the lower linkage slider (530) of each group point to the side groove profile of the die cavity (110) and the top surface of the lower punch (300) form a powder filling cavity (600) in the die cavity (110) for powder filling;
s2, pressing: the upper punch (200) and the lower punch (300) move oppositely to reach a set position for pressing, the side pressure punches (520) move towards the center of the cavity (110) to reach the set position for pressing, the powder is pressed together to be molded, and a compact (700) is formed;
s3, demolding: each side press punch (520) retreats in a direction away from the cavity (110), then the upper punch (200), the compact (700), and the lower punch (300) are raised together to be away from the cavity (110), the upper punch (200) continues to be raised to be away from the compact (700), the compact (700) is taken out, and then the upper punch (200) and the lower punch (300) return to the initial positions, respectively.
8. The molding method of a powder molding apparatus according to claim 7, wherein in step S1, the lower punch (300) is moved to a position below the upper end face of the lower interlocking slide (530) at an initial position where a height difference in the vertical direction between the lower punch (300) and the lower interlocking slide is H2, and the following are satisfied: h2 is more than or equal to 1.5mm and less than or equal to 2.5 mm.
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| CN110480006B (en) * | 2019-09-17 | 2021-08-27 | 哈工大机器人（岳阳）军民融合研究院 | Device and method for magnetic pulse bidirectional pressing based on metal matrix composite material |
| CN112756607A (en) * | 2021-01-18 | 2021-05-07 | 宁波汇众粉末机械制造有限公司 | Side pressing mechanism of powder forming machine and powder forming machine |
| CN113084160B (en) * | 2021-04-06 | 2023-06-09 | 株洲钻石切削刀具股份有限公司 | Alloy blade forming device and forming method thereof |
| CN114472887B (en) * | 2021-12-30 | 2024-07-02 | 山东大学 | A forming die and forming method having a blade with multiple powder structures in the circumferential direction |
| CN116060619A (en) * | 2023-03-29 | 2023-05-05 | 贵阳立特精密机械有限公司 | Powder forming die, powder forming equipment and use method |
| CN118003686B (en) * | 2024-04-08 | 2024-07-02 | 广东创芯旗智能工业有限公司 | Powder forming machine capable of reflecting filler |
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| JP3677318B2 (en) * | 1995-06-05 | 2005-07-27 | 住友電気工業株式会社 | Manufacturing method of hard ball |
| US6113378A (en) * | 1996-08-28 | 2000-09-05 | Minebea Co., Ltd. | Mold for drum-shaped magnetic core |
| JPH1071497A (en) * | 1996-08-29 | 1998-03-17 | Mitsubishi Materials Corp | Method and apparatus for manufacturing indexable tip |
| DE502008002806D1 (en) * | 2008-03-17 | 2011-04-21 | Osterwalder Ag | Powder press for producing a compact of metal powder |
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| CH710828B1 (en) * | 2015-03-05 | 2019-06-28 | Dietmar W Kramer Dr Sc Techn Eth Phd | Powder press and a chuck housing with preferably several for a transverse presses slidable punches. |
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