Powder pressing forming machine and working method thereof

Abstract

The invention relates to a powder pressing forming machine and a working method thereof. The powder pressing forming machine comprises an upper die, a middle die and a lower die, the middle die is installed between the upper die and the lower die, and the upper die is connected with a first driving air cylinder; a feeding plate is arranged between the middle die and the upper die and connected with a second driving air cylinder, a material powder box, a filling plate and a third driving air cylinder are installed on the feeding plate, the material powder box is fixedly connected with the feeding plate, the third driving air cylinder is connected with the filling plate, and the filling plate is fixedly connected with the feeding plate. The material filling plate is mounted between the material powder box and the feeding plate; a discharging port is formed in the material powder box, a material leaking through hole matched with the discharging port is formed in the filling plate, and a feeding port matched with the material leaking through hole is formed in the feeding plate. According to the powder pressing forming machine, the feeding amount of powder can be accurately controlled, and therefore the powder pressing quality and the production efficiency are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of powder metallurgy, and particularly to a powder pressing and forming machine and its working method. Background Art

[0002] ‌Powder pressing manufacturing technology‌ is a process of pressing metal or non-metal powders into specific shapes by external force. This technology is widely used in industrial production, mainly for manufacturing gears, bearings, electronic components, etc. The core principle of the powder pressing process is to apply pressure to loose powders through a mold, causing mechanical interlocking and plastic deformation between powder particles, thereby forming a green body with a certain density and strength. The whole process requires controlling parameters such as the magnitude of pressure, the pressing speed, and the holding time. The fluidity, particle shape, and particle size distribution of the powder directly affect the pressing effect, and spherical powders are easier to fill the mold than irregularly shaped powders. In related technologies, due to the inability to precisely control the powder feeding amount, the quality of powder pressing is uneven, seriously affecting production efficiency.‌ Summary of the Invention

[0003] Based on this, it is necessary to provide a powder metallurgy forming machine and its working method for the problem that the quality of powder pressing is uneven due to the inability to precisely control the powder feeding amount, seriously affecting production efficiency.

[0004] A powder pressing and forming machine includes an upper mold, a middle mold, and a lower mold. The middle mold is installed between the upper mold and the lower mold, and the upper mold is connected to a first driving cylinder; A feeding plate is provided between the middle mold and the upper mold. The feeding plate is connected to a second driving cylinder. A powder box, a filling plate, and a third driving cylinder are installed on the feeding plate. The powder box is fixedly connected to the feeding plate. The third driving cylinder is connected to the filling plate, and the filling plate is installed between the powder box and the feeding plate; The powder box is provided with a discharge port, the filling plate is provided with a leakage through-hole matching the discharge port, and the feeding plate is provided with a feeding port matching the leakage through-hole.

[0005] The above powder pressing and forming machine includes an upper die, a middle die, and a lower die. The middle die is installed between the upper die and the lower die, and the upper die is connected to a first driving cylinder; a feeding plate is provided between the middle die and the upper die. The feeding plate is connected to a second driving cylinder, and a powder box, a filling plate, and a third driving cylinder are installed on the feeding plate. The powder box is fixedly connected to the feeding plate, the third driving cylinder is connected to the filling plate, and the filling plate is installed between the powder box and the feeding plate; the powder box is provided with a discharge port, the filling plate is provided with a leakage through hole that cooperates with the discharge port, and the feeding plate is provided with a feeding port that cooperates with the leakage through hole. When the powder pressing and forming machine works, first, the upper die is controlled to move upward by the first driving cylinder; then, the feeding plate is controlled to translate above the middle die by the second driving cylinder; then, the filling plate is controlled to translate a first preset distance by the third driving cylinder, so that the leakage through hole is aligned with the discharge port, so that the powder enters the filling plate from the powder box; then, the filling plate is controlled to translate a second preset distance by the third driving cylinder, so that the leakage through hole is aligned with the feeding port, so that the powder enters the middle die from the filling plate through the feeding plate; then, the feeding plate is controlled to reset by the second driving cylinder, and the filling plate is controlled to reset by the third driving cylinder; finally, the upper die is controlled to move downward by the first driving cylinder, so as to press and form the powder entering the middle die. Through the above working process, the powder pressing and forming machine can accurately control the feeding amount of the powder, thereby significantly improving the production efficiency and production quality.

[0006] In one embodiment, the filling plate includes a base plate, an adjustment seat, and an adjustment block. The base plate is connected to the third driving cylinder, the adjustment seat is fixedly connected to the base plate and the adjustment block respectively, the base plate is fixedly connected to the adjustment block, and the base plate is provided with an adjustment groove that cooperates with the adjustment block.

[0007] In one embodiment, the adjustment block is provided with a limit hole, and a limit plate that cooperates with the limit hole is installed on the base plate. The extending direction of the limit plate is perpendicular to the extending direction of the adjustment block.

[0008] In one embodiment, a cover plate is installed above the middle die, a cover plate fixing plate is installed above the cover plate, and the feeding plate is arranged between the cover plate fixing plate and the upper die.

[0009] In one embodiment, guide sleeves are arranged at the four corners of the upper die, and guide posts that cooperate with the guide sleeves are arranged on the lower die.

[0010] In one embodiment, the upper die includes a heat insulation plate, a fixing plate, and an upper die plate. The fixing plate is installed above the upper die plate, and the heat insulation plate is installed above the fixing plate.

[0011] In one embodiment, a groove is formed on the surface of the upper mold plate, and an upper mold backing plate is installed in the groove. The upper mold backing plate is fixedly connected to an upper mold pressing plate, and the upper mold pressing plate is fixedly connected to a plurality of upper mold parts.

[0012] In one embodiment, the upper mold pressing plate is provided with an installation groove for installing the upper mold parts, and a convex block for cooperating with the installation groove is formed at the end of the upper mold parts.

[0013] In one embodiment, the cover plate fixing plate is provided with a first material conveying port for cooperating with the feeding port, and the cover plate is provided with a second material conveying port for cooperating with the first material conveying port.

[0014] A working method of a powder pressing and forming machine, which is applied to the above-mentioned powder pressing and forming machine, includes: Controlling the upper mold to move upward through the first driving cylinder; Controlling the feeding plate to translate above the middle mold through the second driving cylinder; Controlling the filling plate to translate a first preset distance through the third driving cylinder, so that the material leakage through hole is aligned with the discharge port, so that the powder enters the filling plate from the powder box; Controlling the filling plate to translate a second preset distance through the third driving cylinder, so that the material leakage through hole is aligned with the feeding port, so that the powder enters the middle mold from the filling plate through the feeding plate; Controlling the feeding plate to reset through the second driving cylinder, and controlling the filling plate to reset through the third driving cylinder; Controlling the upper mold to move downward through the first driving cylinder, so as to press and form the powder entering the middle mold. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the powder pressing and forming machine of the present invention; Figure 2 It is a schematic diagram of the structure of the upper mold in the powder pressing and forming machine of the present invention; Figure 3 It is a schematic diagram of the structure of the upper mold plate in the powder pressing and forming machine of the present invention; Figure 4 It is a schematic diagram of the partial structure of the upper mold in the powder pressing and forming machine of the present invention; Figure 5 It is a schematic diagram of the matching structure between the upper mold pressing plate and the upper mold parts in the powder pressing and forming machine of the present invention; Figure 6 It is a schematic diagram of the matching structure between the powder box and the filling plate in the powder pressing and forming machine of the present invention; Figure 7 It is a schematic diagram of the structure of the filling plate in the powder pressing and forming machine of the present invention; Figure 8 This is a schematic diagram of the mating structure between the substrate and the limit plate in the powder pressing and forming machine of the present invention; Figure 9 This is a schematic diagram of the structure of the adjusting block in the powder pressing and forming machine of the present invention; Figure 10 This is a schematic diagram of the structure of the feeding plate in the powder pressing and forming machine of the present invention; Figure 11 This is a schematic diagram of the partial structure of the powder pressing and forming machine of the present invention; Figure 12 This is a schematic flow diagram of the working method of the powder pressing and forming machine of the present invention; Among them, 10 is the upper die, 20 is the middle die, 30 is the lower die, 40 is the feeding plate, 50 is the cover plate, 60 is the cover plate fixing plate, 11 is the guide sleeve, 12 is the heat insulation plate, 13 is the fixing plate, 14 is the upper die plate, 141 is the groove, 15 is the upper die cushion plate, 16 is the upper die pressing plate, 161 is the installation groove, 17 is the upper die part, 171 is the convex block, 31 is the guide post, 41 is the powder box, 411 is the discharge port, 42 is the filling plate, 421 is the leakage through hole, 422 is the substrate, 4221 is the adjustment groove, 423 is the adjustment seat, 424 is the adjusting block, 4241 is the limit hole, 425 is the limit plate, 43 is the feeding port. Detailed Embodiments

[0016] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed embodiments of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0017] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0019] The present invention discloses a powder pressing and forming machine.

[0020] As Figures 1 to 11 shown, the powder pressing and forming machine includes an upper die 10, a middle die 20, and a lower die 30. The middle die 20 is installed between the upper die 10 and the lower die 30. The upper die 10 is connected to a first driving cylinder. A feeding plate 40 is provided between the middle die 20 and the upper die 10. The feeding plate 40 is connected to a second driving cylinder. A powder box 41, a filling plate 42, and a third driving cylinder are installed on the feeding plate 40. The powder box 41 is fixedly connected to the feeding plate 40. The third driving cylinder is connected to the filling plate 42. The filling plate 42 is installed between the powder box 41 and the feeding plate 40. An outlet 411 is provided on the powder box 41. A leakage through-hole 421 matching the outlet 411 is provided on the filling plate 42. A feeding port 43 matching the leakage through-hole 421 is provided on the feeding plate 40.

[0021] When the powder pressing and forming machine works, first, the upper die 10 is controlled to move upward by the first driving cylinder; then, the feeding plate 40 is controlled to translate above the middle die 20 by the second driving cylinder; then, the filling plate 42 is controlled to translate a first preset distance by the third driving cylinder, so that the leakage through-hole 421 is aligned with the outlet 411, so that the powder enters the filling plate 42 from the powder box 41; then, the filling plate 42 is controlled to translate a second preset distance by the third driving cylinder, so that the leakage through-hole 421 is aligned with the feeding port 43, so that the powder enters the middle die 20 from the filling plate 42 through the feeding plate 40; then, the feeding plate 40 is controlled to reset by the second driving cylinder, and the filling plate 42 is controlled to reset by the third driving cylinder; finally, the upper die 10 is controlled to move downward by the first driving cylinder, so as to press and form the powder entering the middle die 20. Through the above working process, the powder pressing and forming machine can accurately control the feeding amount of the powder, thereby significantly improving the production efficiency and production quality.

[0022] Among them, the packing plate 42 includes a base plate 422, an adjustment seat 423 and an adjustment block 424. The base plate 422 is connected to the third driving cylinder. The adjustment seat 423 is fixedly connected to the base plate 422 and the adjustment block 424 respectively. The base plate 422 is fixedly connected to the adjustment block 424. An adjustment groove 4221 for cooperating with the adjustment block 424 is provided on the base plate 422. In actual production, by changing the length of the adjustment block 424, the size of the material leakage through-hole 421 can be adjusted, so as to adjust the amount of powder carried by the packing plate 42. Further, the adjustment block 424 is detachably connected to the base plate 422 and the adjustment seat 423 respectively, so as to facilitate the adjustment of the length of the adjustment block 424. The adjustment groove 4221 includes a first adjustment groove and a second adjustment groove. The length of the first adjustment groove is greater than the length of the second adjustment groove. The adjustment block 424 includes a first adjustment block for cooperating with the first adjustment groove and a second adjustment block for cooperating with the second adjustment groove. Through the mutual cooperation of the first adjustment groove and the first adjustment block, and the mutual cooperation of the second adjustment groove and the second adjustment block, the packing plate 42 can form two rows of material leakage through-holes 421, thereby improving the production efficiency of the powder compacting machine.

[0023] Among them, a limiting hole 4241 is provided on the adjustment block 424, and a limiting plate 425 for cooperating with the limiting hole 4241 is installed on the base plate 422. The extending direction of the limiting plate 425 is perpendicular to the extending direction of the adjustment block 424. Further, the limiting plate 425 passes through the limiting hole 4241 provided on the adjustment block 424. Through the mutual cooperation of the limiting plate 425 and the limiting hole 4241, the adjustment block 424 is not prone to horizontal displacement, further ensuring the dimensional accuracy of the material leakage through-hole 421 and making the control of the powder feeding amount more accurate.

[0024] Among them, a cover plate 50 is installed above the middle mold 20, a cover plate fixing plate 60 is installed above the cover plate 50, and the feeding plate 40 is arranged between the cover plate fixing plate 60 and the upper mold 10. Further, the cover plate fixing plate 60 is provided with a first material conveying port 61 for cooperating with the feeding port 43, and the cover plate 50 is provided with a second material conveying port 51 for cooperating with the first material conveying port 61. The cover plate 50 can seal the top opening of the middle mold 20 to prevent powder from overflowing during the pressing process and ensure the airtightness of the forming cavity. When filling powder, the cover plate 50 and the middle mold 20 cooperate to form a fixed forming cavity, ensuring uniform distribution of the powder and avoiding eccentric loading or looseness. The cover plate fixing plate 60 can fix the position of the cover plate 50, ensuring the alignment accuracy between the cover plate 50 and the middle mold 20 and avoiding deviation during the pressing process.

[0025] Among them, guide sleeves 11 are arranged at the four corners of the upper mold 10, and guide posts 31 for cooperating with the guide sleeves 11 are arranged on the lower mold 30. Through the mutual cooperation of the guide sleeves 11 and the guide posts 31, the alignment between the upper mold 10 and the lower mold 30 is more accurate, thereby improving the quality and efficiency of the pressing and forming.

[0026] Among them, the upper die 10 further includes a heat insulation plate 12, a fixing plate 13 and an upper die plate 14. The fixing plate 13 is installed above the upper die plate 14, and the heat insulation plate 12 is installed above the fixing plate 13. The upper die plate 14 is located at the bottom of the upper die 10 and directly cooperates with the middle die 20. It is the final acting surface of the forming pressure and transmits high pressure through the precisely designed surface to densify the powder and form a predetermined shape. The fixing plate 13 is located between the heat insulation plate 12 and the upper die plate 14, and its core function is to connect and fix the upper die plate 14 to ensure its accurate position and uniform force. The heat insulation plate 12 is beneficial to rapid heat dissipation and can extend the service life of the fixing plate 13 and the upper die plate 14.

[0027] Among them, a groove 141 is formed on the surface of the upper die plate 14, and an upper die backing plate 15 is installed in the groove 141. The upper die backing plate 15 is fixedly connected with an upper die pressing plate 16, and the upper die pressing plate 16 is fixedly connected with a plurality of upper die parts 17. The upper die backing plate 15 is embedded in the groove 141 of the upper die plate 14, mainly used to adjust the height and fill the gap to ensure the accurate alignment of the upper die pressing plate 16 and the upper die plate 14. The upper die pressing plate 16 is fixedly connected with the upper die backing plate 15, mainly used to integrate and fix a plurality of upper die parts 17 and form an integral structure. The upper die parts 17 are directly in contact with the powder in the cavity of the middle die 20, and can apply high pressure to the powder to complete the densification and shape forming of the powder. Specifically, the upper die parts 17 act on the upper part of the cavity of the middle die 20. The lower die 30 further includes a lower die part, and the lower die part acts on the lower part of the cavity of the middle die 20.

[0028] Among them, the upper die pressing plate 16 is provided with an installation groove 161 for installing the upper die parts 17, and a convex block 171 for cooperating with the installation groove 161 is formed at the end of the upper die parts 17. Through the mutual cooperation of the convex block 171 and the installation groove 161, the upper die parts 17 can be limited to prevent the upper die parts 17 from coming out during the pressing process.

[0029] The present invention also discloses a working method of a powder pressing and forming machine, which is applied to the above-mentioned powder pressing and forming machine. As Figure 12 shown, the working method of the powder pressing and forming machine includes: Step S1: Control the upper die 10 to move upward through the first driving cylinder.

[0030] Step S2: Control the feeding plate 40 to translate above the middle die 20 through the second driving cylinder.

[0031] Step S3: Control the filling plate 42 to translate a first preset distance through the third driving cylinder, so that the material leakage through hole 421 is aligned with the discharge port 411, so that the powder enters the filling plate 42 from the powder box 41.

[0032] Step S4: Control the translation of the filler plate 42 by the third driving cylinder for a second preset distance to align the material leakage through-hole 421 with the material feeding port 43, so that the powder can enter the middle die 20 from the filler plate 42 via the material feeding plate 40.

[0033] Step S5: Control the reset of the material feeding plate 40 by the second driving cylinder and control the reset of the filler plate 42 by the third driving cylinder.

[0034] Step S6: Control the downward movement of the upper die 10 by the first driving cylinder to press and form the powder that has entered the middle die 20.

[0035] Through the above steps S1 to S6, the powder compacting machine can accurately control the powder feeding amount, thereby significantly improving the production efficiency and production quality.

[0036] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of 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 described in this specification.

[0037] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent shall be subject to the appended claims.

Claims

1. A powder pressing machine, characterized in that: It includes an upper die, a middle die and a lower die, wherein the middle die is installed between the upper die and the lower die, and the upper die is connected to a first driving cylinder; A feeding plate is provided between the middle die and the upper die, the feeding plate is connected to a second driving cylinder, a powder box, a filler plate and a third driving cylinder are installed on the feeding plate, the powder box is fixedly connected to the feeding plate, the third driving cylinder is connected to the filler plate, and the filler plate is installed between the powder box and the feeding plate; The powder box is provided with a discharge port, the filler plate is provided with a leakage through hole matched with the discharge port, and the feed plate is provided with a feed port matched with the leakage through hole.

2. The powder compacting machine according to claim 1, characterized in that: The filling plate includes a base plate, an adjustment seat and an adjustment block. The base plate is connected to the third driving cylinder. The adjustment seat is fixedly connected to the base plate and the adjustment block respectively. The base plate is fixedly connected to the adjustment block. An adjustment groove matching the adjustment block is provided on the base plate.

3. The powder compacting machine according to claim 2, characterized in that: The adjusting block is provided with a limiting hole, and the base plate is mounted with a limiting plate matching the limiting hole, and the extending direction of the limiting plate is perpendicular to the extending direction of the adjusting block.

4. The powder compacting machine according to any one of claims 1 to 3, characterized in that: A cover plate is installed above the middle mold, a cover plate fixing plate is installed above the cover plate, and the feeding plate is arranged between the cover plate fixing plate and the upper mold.

5. The powder compacting machine according to claim 4, characterized in that: The four corners of the upper die are provided with guide sleeves, and the lower die is provided with guide pillars matching the guide sleeves.

6. The powder compacting machine according to claim 5, characterized in that: The upper mold comprises a heat insulation plate, a fixing plate and an upper mold plate, wherein the fixing plate is installed above the upper mold plate, and the heat insulation plate is installed above the fixing plate.

7. The powder compacting machine according to claim 6, characterized in that: A groove is formed on the surface of the upper mold plate, an upper mold pad is installed in the groove, the upper mold pad is fixedly connected to an upper mold pressing plate, and the upper mold pressing plate is fixedly connected to a plurality of upper mold parts.

8. The powder compacting machine according to claim 7, characterized in that: The upper mold plate is provided with a mounting groove for mounting the upper mold member, and a protrusion matching the mounting groove is formed at the end of the upper mold member.

9. The powder compacting machine according to claim 4, characterized in that: The cover plate fixing plate is provided with a first material delivery port matched with the material feeding port, and the cover plate is provided with a second material delivery port matched with the first material delivery port.

10. A working method of a powder pressing molding machine, applied to the powder pressing molding machine according to any one of claims 1 to 9, characterized in that: include: Controlling the upper mold to move upward by the first driving cylinder; Controlling the feeding plate to move horizontally to above the middle mold by the second driving cylinder; The filler plate is controlled to translate a first preset distance by the third driving cylinder so that the leakage hole is aligned with the discharge port, so that the powder enters the filler plate from the powder box; The filler plate is controlled to translate a second preset distance by the third driving cylinder so that the leakage hole is aligned with the feed port, so that the powder enters the middle mold from the filler plate through the feed plate; The feeding plate is controlled to be reset by the second driving cylinder, and the filling plate is controlled to be reset by the third driving cylinder; The upper die is controlled to move downward by the first driving cylinder, so that the powder entering the middle die is pressed and formed.

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