Powder blank preparation tool

Abstract

The utility model belongs to the field of powder blank preparation, and particularly relates to a powder blank preparation tool which comprises a mold, a vacuum bag, a cover plate and a vibration motor. The mold is of a square shell-shaped structure with an opening in the top. The vacuum bag can be placed in the mold through the opening and is used for containing powder; the cover plate is detachably arranged on the opening in a covering mode, and a slit allowing the bag opening of the vacuum bag to stretch out is formed in the cover plate; the vibration motor is arranged on the outer side face of the mold. Through integration of a vibration motor, powder filling and vibration compaction are synchronously carried out, the component uniformity of a powder blank is enhanced, and meanwhile labor waste and low efficiency caused by operation of powder filling and vibration compaction in different working procedures are reduced; by applying a vacuumizing heat sealing method, the powder blank which is not subjected to high-strength pressing is endowed with the capacity of keeping the shape of the powder blank, meanwhile, powder blank gaps and residual dead angles which are not filled with powder are reduced, and the subsequent processing performance is improved.

Description

Technical Field

[0001] This application relates to the technical field of powder blank preparation, and particularly relates to a powder blank preparation tooling. Background Art

[0002] Powder metallurgy is a process technology for producing metal powders or using metal powders (or mixtures of metal powders and non-metal powders) as raw materials, and manufacturing metal materials, composite materials, and various types of products through forming and sintering.

[0003] Among them, the commonly used methods in the forming step include pressing by a hydraulic press, restricting by a profiling die, etc. Among them, although pressing by a hydraulic press is simple and fast, due to the limitation of the equipment principle, unidirectional pressing is likely to cause problems such as uneven density of the formed blank. The profiling die restricts the shape of the powder material, and the possible problems include uneven powder filling and incomplete filling at the dead corner position of the die, resulting in defects in the subsequent processed blank. Utility Model Content

[0004] The embodiments of this application provide a powder blank preparation tooling, aiming to solve the problem of the uniformity of the powder blank required in the subsequent processing process, making the powder filling uniform and avoiding incomplete filling at the dead corner position of the die.

[0005] To achieve the above object, this application provides a powder blank preparation tooling, including:

[0006] A die, which is a square shell-like structure with an opening at the top;

[0007] A vacuum bag, which can be placed into the die through the opening, and the vacuum bag is used to hold the powder material;

[0008] A cover plate, which is detachably covered on the opening, and a slit for the bag mouth of the vacuum bag to extend out is arranged on the cover plate; and

[0009] A vibration motor, which is arranged on the outer side surface of the die.

[0010] Optionally, the die includes a body and a bottom plate. The body is a square cylindrical structure with open upper and lower ends. The vibration motor is arranged on one side of the body. The cover plate is detachably covered on one end of the top of the body. A plurality of strip-shaped jacks are arranged at intervals along the height direction of the body on the side opposite to the vibration motor of the body. The bottom plate can be selectively inserted into the body through different strip-shaped jacks.

[0011] Optionally, the body is formed by welding four stainless steel rectangular plates in pairs opposite to each other.

[0012] Optionally, the body includes a first rectangular plate, a second rectangular plate, a third rectangular plate, and a fourth rectangular plate. The first rectangular plate and the second rectangular plate are of the same size and are arranged opposite to each other. The third rectangular plate and the fourth rectangular plate are of the same size and are arranged opposite to each other. The vibration motor is arranged outside the first rectangular plate. A plurality of through holes are evenly distributed on the second rectangular plate, the third rectangular plate, and the fourth rectangular plate.

[0013] Optionally, the cover plate includes a top plate and connecting plates arranged at opposite ends of the top plate and perpendicularly connected to the top plate. Threaded mounting holes are provided on both connecting plates. A fastening screw is screwed into the threaded mounting hole. When the cover plate covers the opening, the top plate covers the opening, and the two connecting plates respectively fit on the outer walls of the mold on opposite sides of the opening. The fastening screw is used to lock the connecting plate to the mold.

[0014] Optionally, a guiding structure is provided between the two connecting plates and the outer walls of the mold on opposite sides of the opening.

[0015] Optionally, the guiding structure includes guiding columns arranged on the outer wall of the mold and guiding notches arranged on the connecting plate and extending in a direction perpendicular to the top plate.

[0016] Optionally, the vibration motor is detachably arranged on the outer side surface of the mold.

[0017] Optionally, threaded holes are provided on the outer side surface of the mold, and the vibration motor and the mold are connected by screws.

[0018] Optionally, a boss is provided on the outer side surface of the mold, and an arc-shaped mounting surface adapted to the outer wall of the vibration motor is provided on the boss. The vibration motor is arranged on the boss and fits with the arc-shaped mounting surface.

[0019] The beneficial effect of the powder blank preparation tooling provided by the present application is as follows: Compared with the prior art, when the powder blank preparation tooling of the present application is used, a vacuum bag is placed in the mold, and powder is gradually added from the bottom of the vacuum bag upwards using a powder filling funnel. After filling to the opening position at the top of the mold, the vibration motor can be started to vibrate and compact the powder. After compaction, powder is continuously filled to the opening position of the mold, and the vibration motor is started again to vibrate and compact the powder. When the powder is fully compacted and the upper surface of the powder blank is flush with the opening of the mold, fold the bag mouth, cover the cover plate, so that the bag mouth of the vacuum bag passes through the slit on the cover plate, and the vacuum bag is evacuated and heat-sealed by a vacuum heat-sealing machine to fix the shape of the powder blank.

[0020] This powder blank preparation tooling integrates vibration motors to synchronize powder filling and compaction, enhancing the compositional uniformity of the powder blank. At the same time, it reduces labor waste and inefficiency caused by separate operations for powder filling and compaction. By applying the vacuum heat-sealing method, the powder blank without high-intensity pressing is given the ability to maintain its shape, while reducing the gaps in the powder blank and dead corners of unfilled powder, improving subsequent processing performance. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Among them:

[0023] Figure 1 is the overall structural schematic diagram of the powder blank preparation tooling shown in an embodiment of the present application;

[0024] Figure 2 is the exploded structural schematic diagram of the mold in the powder blank preparation tooling shown in an embodiment of the present application.

[0025] Main element symbol description:

[0026] 100, mold; 110, body; 1101, opening; 1102, strip-shaped jack; 111, first rectangular plate; 112, second rectangular plate; 113, third rectangular plate; 114, fourth rectangular plate; 120, bottom plate;

[0027] 200, cover plate; 210, top plate; 211, slit; 220, connecting plate; 230, fastening screw;

[0028] 300, vibration motor;

[0029] 400, guiding structure; 410, guiding column; 420, guiding notch. Detailed Embodiments

[0030] To facilitate the understanding of the present application, the following will describe the present application more comprehensively with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure content of the present application more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0033] In addition, the terms "first", "second", "third", "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0035] It should also be noted that in the embodiments of the present application, the same reference numerals are used to represent the same components or the same parts. For the same parts in the embodiments of the present application, only one of the parts or components may be marked with a reference numeral in the figure. It should be understood that the reference numerals are equally applicable to other identical parts or components.

[0036] The powder blank refers to a preliminary product obtained by vibrating and compacting loose powder into a certain shape. Its strength is relatively small and it cannot maintain a certain regular shape by itself. After subsequent sintering processing, it becomes a blank with higher strength and a fixed shape.

[0037] As described in the background art, in the existing methods for preparing powder blanks, pressing with a hydraulic press is likely to cause uneven density of the formed blank, and problems such as uneven powder filling and incomplete filling at the dead corners of the profiling die may occur in the profiling die restriction, resulting in defects in the subsequent processed blank.

[0038] To solve the problems of blank composition and density uniformity, while making the powder filling uniform and avoiding voids in the dead corners of the mold, a solution combining powder vibration and profiling mold is designed. At the same time, a vacuum pumping design is added to make the initially formed powder blank have a certain shape retention, which is convenient for subsequent processing.

[0039] In one embodiment, as Figure 1 shown, the powder blank preparation tooling includes a mold 100, a vacuum bag (not shown in the figure), a cover plate 200, and a vibration motor 300. The mold 100 is a square shell-like structure with an opening 1101 at the top; the vacuum bag can be placed into the mold 100 through the opening 1101, and the vacuum bag is used to hold the powder; the cover plate 200 is detachably covered on the opening 1101, and a slit 211 for the bag mouth of the vacuum bag to extend is provided on the cover plate 200; the vibration motor 300 is arranged on the outer side surface of the mold 100.

[0040] When using this powder blank preparation tooling, place the vacuum bag in the mold 100, use a powder filling funnel to gradually fill the powder from the bottom of the vacuum bag upwards. After filling to the position of the opening 1101 at the top of the mold 100, the vibration motor 300 can be started to vibrate and compact the powder. After compaction, continue to fill the powder to the position of the opening 1101 of the mold 100, and start the vibration motor 300 again to vibrate and compact the powder. When the powder is fully compacted and the upper surface of the powder blank is flush with the opening 1101 of the mold 100, fold the bag mouth, cover the cover plate 200, make the bag mouth of the vacuum bag pass through the slit 211 on the cover plate 200, and use a vacuum heat sealer to evacuate and heat seal the vacuum bag to fix the shape of the powder blank.

[0041] Through the integration of the vibration motor 300, this powder blank preparation tooling realizes the synchronous filling and compaction of the powder, strengthens the composition uniformity of the powder blank, and at the same time reduces the manual waste and low efficiency caused by the separate operations of powder filling and compaction; by applying the vacuum heat sealing method, the powder blank without high-strength pressing is given the ability to maintain its own shape, and at the same time reduces the powder blank gap and the dead corners of the unfilled powder, improving the subsequent processing performance.

[0042] Further, during use, when the powder is fully compacted and the upper surface of the powder blank is flush with the opening 1101 of the mold 100, fold the bag mouth and insert a pressing plate (not shown in the figure) to make the upper surface of the mold 100 flat, and then cover the cover plate 200. By applying the pressing plate, the bag mouth of the vacuum bag is bent into an S shape, and then through the pressing force applied by the cover plate 200, the overflow of the powder in the bag during vacuum pumping can be reduced, and at the same time, the flatness of the upper surface of the powder body can be ensured.

[0043] In one embodiment, as Figures 1 - 2As shown in the figure, the mold 100 includes a main body 110 and a bottom plate 120. The main body 110 is a square cylindrical structure with open upper and lower ends. The vibration motor 300 is arranged on one side of the main body 110. The cover plate 200 is detachably covered on one end of the top of the main body 110. On the side of the main body 110 opposite to the vibration motor 300, a plurality of strip-shaped jacks 1102 are arranged at intervals along the height direction of the main body 110. The bottom plate 120 can be selectively inserted into the main body 110 through different strip-shaped jacks 1102 to realize the customization of powder blanks with different lengths and specifications. The operation is simple, and only the position of the bottom plate 120 needs to be changed to process powder blanks of different specifications.

[0044] Preferably, one long side of the bottom plate 120 has a protruding tongue, which is convenient for grasping and placing.

[0045] In a specific embodiment, the main body 110 is formed by welding two pairs of stainless steel rectangular plates opposite to each other. With this setting, it is made of metal materials by welding, simple to prepare, strong and durable. It can be understood that the main body 110 can also be formed by welding or screwing metal plates of other materials, or can be a casting formed by integral injection molding.

[0046] In a specific embodiment, in combination Figure 1 and Figure 2 As shown in the figure, the main body 110 includes a first rectangular plate 111, a second rectangular plate 112, a third rectangular plate 113 and a fourth rectangular plate 114. The first rectangular plate 111 and the second rectangular plate 112 are of the same size and are arranged opposite to each other. The third rectangular plate 113 and the fourth rectangular plate 114 are of the same size and are arranged opposite to each other. The vibration motor 300 is arranged outside the first rectangular plate 111. A plurality of through holes are evenly distributed on the second rectangular plate 112, the third rectangular plate 113 and the fourth rectangular plate 114.

[0047] The through holes evenly distributed on the second rectangular plate 112, the third rectangular plate 113 and the fourth rectangular plate 114 can serve as observation ports while playing a role in weight reduction to confirm whether the powder blanks are vibrated solid and evenly.

[0048] Specifically, the diameter of the through hole is 3 mm, and the center distance between adjacent through holes is 6 mm.

[0049] In an embodiment, as Figure 1 and Figure 2As shown, the cover plate 200 includes a top plate 210 and connecting plates 220 disposed at opposite ends of the top plate 210 and perpendicularly connected thereto, that is, the overall shape of the cover plate 200 is U-shaped. Threaded mounting holes are provided on both connecting plates 220, and fastening screws 230 are screwed into the threaded mounting holes. When the cover plate 200 is covered on the opening 1101, the top plate 210 covers the opening 1101, and the two connecting plates 220 are respectively attached to the outer walls of the mold 100 on opposite sides of the opening 1101. The fastening screws 230 are used to lock the connecting plates 220 to the mold 100.

[0050] Specifically, the cover plate 200 can be made of a sheet metal part, which is formed by punching and bending a metal sheet.

[0051] In a specific embodiment, please continue to refer to Figure 1 and Figure 2 , a guiding structure 400 is provided between the two connecting plates 220 and the outer walls of the mold 100 on opposite sides of the opening 1101, and the guiding structure 400 is used to limit and guide the connection between the cover plate 200 and the top of the main body 110.

[0052] Specifically, in one implementation, the guiding structure 400 includes guiding columns 410 provided on the outer wall of the mold 100 and guiding slots 420 provided on the connecting plates 220 and extending in a direction perpendicular to the top plate 210; in another implementation, the guiding structure 400 includes a guide rail provided on the outer wall of the mold 100 and extending vertically and a slider provided on the inner side of the connecting plate 220.

[0053] In one embodiment, as Figure 1 shown, the vibration motor 300 is detachably disposed on the outer side surface of the mold 100. With this design, the functions of installing the vibration motor 300 during use and disassembling it during vacuum pumping can be achieved.

[0054] Specifically, threaded holes are provided on the outer side surface of the mold 100, and the vibration motor 300 and the mold 100 are connected by screws. Of course, in other embodiments, a quick-release design can also be adopted between the vibration motor 300 and the mold 100, replacing the screw connection with a quick-release card slot.

[0055] In one embodiment, a boss is integrally formed on the outer side surface of the mold 100, and an arc-shaped mounting surface adapted to the outer wall of the vibration motor 300 is provided on the boss. The vibration motor 300 is disposed on the boss and fits with the arc-shaped mounting surface. In this way, the most efficient oscillation force transmission can be achieved, and the integrated design enables it to complete faster and more standard powder vibration processing.

[0056] In summary, in a specific embodiment, in combination with Figures 1 - 2As shown, the overall dimensions of the green compact preparation tooling are 155 mm × 84 mm × 75 mm. Among them, the body 110 of the mold 100 has dimensions of 155 mm × 84 mm × 30 mm. On the lower part of the side of the body 110 opposite to the vibration motor 300, four strip-shaped jacks 1102 with a spacing of 15 mm are longitudinally arranged. The strip-shaped jacks 1102 have dimensions of 80 mm × 2 mm and are through on one side. The bottom plate 120 has dimensions of 79 mm × 25 mm × 1.9 mm. The vacuum bag uses a customized 250 mm × 80 mm × 25 mm square brick bag, which is suitable for vacuum pumping and heat sealing.

[0057] The vibration motor 300 is selected as a DC high-frequency attached motor with a maximum power of 30 W, powered by DC 24 V, with adjustable speed, a maximum speed of 7000 revolutions per minute, and a maximum exciting force of 20 KG / 0.2 KN.

[0058] The cover plate 200 is a U-shaped structure formed by connecting the top plate 210 and two connecting plates 220. There is a slit 211 with a width of 1 mm and a length of 80 mm in the center of the top plate 210 for passing the bag mouth of the vacuum bag. The connecting plate 220 is a gradually narrowing structure with a width of 2 mm and a length of 35 mm. An M3-sized screw hole is opened above it, passing through the connecting plate 220, and cooperating with the fastening screw 230 to lock the position of the cover plate 200, playing a role in standardizing the flatness of the upper surface of the green compact. Optionally, several pressing plates can be selected to fold the bag mouth of the vacuum bag into a rotary shape to prevent powder from overflowing during vacuum pumping.

[0059] The vibration motor 300, the cover plate 200 and the mold 100 are all fixed by screws, which is simple and convenient to use.

[0060] In summary, the green compact preparation tooling provided by this application has the following beneficial effects:

[0061] 1. It solves the problem of uneven composition caused by pressing green compacts with ordinary hydraulic presses, and eliminates the subsequent problems of defective processed products caused thereby.

[0062] 2. It solves the problem that general mold containers can only limit the shape of green compacts to a certain extent, solves the trouble that green compacts break up when demolded, and provides workpieces to be processed with a square shape and small occupied space for subsequent processes.

[0063] 3. According to different blank requirements, green compacts of different specifications can be processed to meet differentiated needs.

[0064] 4. It solves the problem of internal voids in the mold caused by the ordinary processing method of first sealing and then vibrating and compacting, and reduces the powder flow problem caused by this void in subsequent processing.

[0065] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0066] The above embodiments only express several implementation manners of the present application, and the description thereof is relatively specific and detailed, but it should not be understood as a limitation to the scope of the application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A powder blank preparation tool, characterized in that: include: The mold is a square shell-like structure with an opening on the top; A vacuum bag, which can be placed into the mold through the opening, and is used to contain powder; A cover plate is detachably covered on the opening, and a slit is provided on the cover plate for the bag opening of the vacuum bag to extend out; as well as The vibration motor is arranged on the outer side of the mold.

2. The powder blank preparation tool according to claim 1, characterized in that: The mold includes a body and a bottom plate, the body is a square cylindrical structure with upper and lower ends open, the vibration motor is arranged on one side of the body, the cover plate is detachably covered on one end of the top of the body, and a plurality of strip-shaped plug holes are arranged at intervals along the height direction of the body on one side of the body opposite to the vibration motor, and the bottom plate can be selectively inserted into the body through different strip-shaped plug holes.

3. The powder blank preparation tool according to claim 2, characterized in that: The body is formed by welding four stainless steel rectangular plates in pairs.

4. The powder blank preparation tool according to claim 2, characterized in that: The body includes a first rectangular plate, a second rectangular plate, a third rectangular plate and a fourth rectangular plate, the first rectangular plate and the second rectangular plate have the same size and are arranged opposite to each other, the third rectangular plate and the fourth rectangular plate have the same size and are arranged opposite to each other, the vibration motor is arranged on the outer side of the first rectangular plate, and the second rectangular plate, the third rectangular plate and the fourth rectangular plate are evenly distributed with multiple through holes.

5. The powder blank preparation tool according to claim 1, characterized in that: The cover plate includes a top plate and connecting plates arranged at opposite ends of the top plate and vertically connected to the top plate. Both connecting plates are provided with threaded mounting holes, and fastening screws are screwed into the threaded mounting holes. When the cover plate is covered on the opening, the top plate covers the opening, and the two connecting plates are respectively attached to the outer walls of the mold on opposite sides of the opening, and the fastening screws are used to lock the connecting plates to the mold.

6. The powder blank preparation tool according to claim 5, characterized in that: A guiding structure is arranged between the two connecting plates and the outer wall of the mold at two opposite sides of the opening.

7. The powder blank preparation tool according to claim 6, characterized in that: The guide structure comprises a guide column arranged on the outer wall of the mold and a guide notch arranged on the connecting plate and extending in a direction perpendicular to the top plate.

8. The powder blank preparation tool according to claim 1, characterized in that: The vibration motor is detachably arranged on the outer side surface of the mold.

9. The powder blank preparation tool according to claim 8, characterized in that: A threaded hole is arranged on the outer side surface of the mold, and the vibration motor is connected to the mold via screws.

10. The powder blank preparation tool according to claim 1, characterized in that: A boss is provided on the outer side surface of the mold, and an arc-shaped mounting surface adapted to the outer wall of the vibration motor is provided on the boss. The vibration motor is arranged on the boss and fits the arc-shaped mounting surface.

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