Powder forming press for bidirectionally pressing annular product

Abstract

The utility model relates to the technical field of hydraulic machines, in particular to a powder forming press for bidirectionally pressing annular products. Comprising a lower cross beam, an upper sliding block, an upper cross beam, stand columns, a downward pressing assembly and a mold assembling body, the four stand columns extending upwards are arranged at the four corners of the lower cross beam respectively, the upper cross beam is fixedly arranged at the top ends of the stand columns, an upper main cylinder is arranged on the upper cross beam, and the stand columns are connected with the upper sliding block in a sliding mode; the downward pressing assembly comprises lower main cylinders, lower sliding blocks, guide rods and a fixing plate, a plurality of lower main cylinders are embedded in the lower cross beam, the lower sliding blocks are arranged at the movable ends of the lower main cylinders, the guide rods are arranged at the four corners of each lower sliding block, and the fixing plate is arranged at the top ends of the guide rods; the center position of the lower sliding block and the center position of the fixing plate are correspondingly provided with a mold assembly body. Through bidirectional pressing of powder, the purposes that the densities of the upper face and the lower face of a pressed annular product are consistent, demolding is easy, and the mold can be replaced are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic presses, in particular to a powder forming press for bidirectionally pressing annular products. Background Art

[0002] The currently known action mode of the ring powder press is to fill the powder into the material cavity and then perform unidirectional pressing, which will result in a higher density at the pressing end and a lower density at the non-pressing end. The product is unevenly stressed and easy to break. In addition, manual demolding or adding a demolding cylinder is used during demolding, which greatly wastes time and increases costs. Some presses only have one set of molds and can only press one product, which is not ideal.

[0003] To this end, the utility model proposes a powder forming press for bidirectionally pressing annular products. By bidirectionally pressing the powder, the purpose of making the upper and lower surfaces of the pressed annular product uniform in density and easy demoulding and mold replacement is achieved. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and proposes a bidirectional pressing powder forming press for pressing annular products.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A powder forming press for bidirectionally pressing annular products, comprising a lower crossbeam, an upper slider, an upper crossbeam, a column, a lower pressing component and a mold assembly, wherein four columns extending upward are arranged at the four corners of the lower crossbeam, an upper crossbeam is fixedly arranged at the top of the column, an upper master cylinder is arranged on the upper crossbeam, an upper slide block is slidably connected to the column, the upper slide block is between the lower crossbeam and the upper crossbeam, the upper slide block is connected to the movable output end of the upper master cylinder, the lower pressing component comprises a lower master cylinder, a lower slide block, a guide rod and a fixing plate, a plurality of lower master cylinders are embedded in the lower crossbeam, a lower slide block is arranged at the movable end of the lower master cylinder, guide rods are arranged at the four corners of the lower slide block respectively, and a fixing plate is arranged at the top of the guide rod;

[0007] Furthermore, the mold assembly comprises an outer mold, a mold core, a mold cavity, a mold core assembly, a lower die punch (15) and a lower die punch support, a hollow cylindrical outer mold is fixed through the center of the fixed plate, and a mold core assembly is arranged inside the outer mold;

[0008] The core assembly includes a core, a core rod and a core fixing column. A mold cavity is formed between the inner wall of the hollow part of the outer mold and the outer wall of the core. The lower part of the core is connected to the core rod. The bottom of the core rod is threadedly connected to the core fixing column. The core fixing column extends downward through the lower slider to the lower cross beam and is fixedly connected to the lower cross beam. The lower slider is fixedly connected to a lower punch support at the center position. The upper end of the lower punch support is connected to a lower punch. The lower punch is a hollow cylinder and its thickness matches the mold cavity.

[0009] Furthermore, a first boss protruding outward is provided on the top outer edge of the lower die punch support, and a second boss protruding outward is provided on the bottom outer edge of the lower die punch, and the first boss and the second boss are connected by a connecting cover.

[0010] The connecting gland comprises a left arc portion and a right arc portion, the cross-sections of the left arc portion and the right arc portion are bracket-shaped, threaded holes are symmetrically arranged on both sides of the outer side of the left arc portion near the right arc portion, and threaded holes matching the threaded holes are symmetrically arranged on both sides of the outer side of the right arc portion near the left arc portion.

[0011] Furthermore, further, the area of ​​the lower sliding block is smaller than that of the fixed plate, and fixed support plates are arranged at the left and right ends of the fixed plate along the height direction, and the fixed support plates extend downward to the lower cross beam and are fixedly connected to the lower cross beam.

[0012] Furthermore, the front and rear sides of the upper table of the lower cross beam are respectively provided with limit blocks for limiting the lower sliding block from falling.

[0013] Compared with the existing technology, the advantages of the powder forming press for bidirectional pressing of annular products provided by the utility model are:

[0014] 1. Bidirectional pressing makes the pressed product have uniform density and is not easy to crack.

[0015] 2. Automatic demoulding saves time and labor costs.

[0016] 3. The mold can be replaced to achieve the pressing of products of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of a powder forming press for bidirectionally pressing annular products according to the utility model;

[0018] Figure 2 This is a front view of a powder forming press for bidirectionally pressing annular products according to the utility model;

[0019] Figure 3 It is a cross-sectional view of a mold assembly in a powder forming press for bidirectionally pressing annular products according to the utility model.

[0020] Figure 4 The utility model is a two-section view of a mold assembly in a powder forming press for bidirectionally pressing annular products.

[0021] In the figure: 1, lower cross beam, 2, column, 3, upper cross beam, 4, upper main cylinder, 5, upper slider, 6, lower main cylinder, 7, lower slider, 8, guide rod, 9, fixed plate, 10, outer mold, 101, outer mold sleeve flange, 11, mold core, 12, mold core rod, 13, mold cavity, 14, mold core fixing column, 141, mold core fixing column flange, 15, lower die punch, 16, lower die punch support, 17, first boss, 18, second boss, 19, connecting cover, 20, limit block, 21, fixed support plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front",

[0024] The directions or positional relationships indicated by “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, it cannot be understood as a limitation on the present invention. At the same time, the terms “first”, “second”, etc. are only for distinguishing the names of the components, and there is no primary or secondary relationship. Therefore, it cannot be understood as a limitation on the present invention.

[0025] Embodiment 1, as Figure 1 , Figure 2As shown, a powder forming press for bidirectionally pressing annular products comprises a lower crossbeam 1, a column 2, an upper crossbeam 3, an upper main cylinder 4, an upper slider 5, a lower pressing component and a mold assembly. Four columns 2 extending upward are arranged at the four corners of the lower crossbeam. An upper crossbeam 3 is fixedly arranged at the top of the column 2. An upper main cylinder 4 is arranged on the upper crossbeam 3. An upper slider 5 is slidably connected to the column 2. The upper slider 5 is between the lower crossbeam 1 and the upper crossbeam 3. The upper slider 5 is connected to the movable output end of the upper main cylinder 4. The lower pressing component comprises a lower main cylinder 6, a lower slider 7, a guide rod 8 and a fixing plate 9. Several lower main cylinders 6 are embedded in the lower crossbeam 1. In this embodiment, there are two lower main cylinders 6 and they are symmetrically arranged and fixed inside the lower crossbeam 1 by a pressure cover. A lower slider 7 is arranged at the movable end of the lower main cylinder 6. Guide rods 8 are respectively arranged at the four corners of the lower slider 7. A fixing plate 9 is arranged at the top of the guide rod 8.

[0026] Through this technical solution, the lower slider 7 is driven by the movable end of the lower master cylinder 6 to achieve up and down reciprocating motion on the guide rod 8.

[0027] In order to make the lower slider 7 move more smoothly, a guide sleeve is further provided on the contact surface between the lower slider 7 and the guide rod 8 .

[0028] like Figure 3 , Figure 4 As shown, the mold assembly includes an outer mold 10, a mold core 11, a mold cavity 13, a mold core assembly, a lower die punch 15 and a lower die punch support 16. The center position of the fixed plate 9 is fixed with a hollow cylindrical outer mold 10, and the outer mold 10 is provided with a mold core assembly;

[0029] The connection between the fixed plate 9 and the outer mold 10 is specifically as follows: a through hole is provided at the center position of the fixed plate 9, and a first annular step and a second annular step are provided on the wall of the through hole. The outer mold 10 is a hollow cylinder, and an annular boss is provided on the outer wall of the outer mold 10 near the upper end. The first annular step matches the annular boss, and the lower surface of the annular boss is just placed on the first annular step, and the upper surface of the annular boss is flush with the second annular step. The lower plane of the outer mold sleeve flange 101 can contact and cover the upper surface of the annular boss and the second annular step, so that the outer mold 10 can be fixed on the fixed plate 9, and the upper end of the outer mold 10 is flush with the upper plane of the fixed plate 9.

[0030] The core assembly includes a core 11, a core rod 12 and a core fixing column 14. A cavity 13 is formed between the inner wall of the hollow portion of the outer mold 10 and the outer wall of the core 11. The lower part of the core 11 is fixedly connected to the core rod 12, and the bottom of the core rod is threadedly connected to the core fixing column 14. The core fixing column 14 extends downward through the lower slider 7 to the lower cross beam 1, and is fixedly connected to the lower cross beam 1 through the core fixing column flange 141. The lower slider is fixedly connected to a lower punch support 16 at the center position, and a lower punch 15 is fixedly connected to the upper end of the lower punch support. The lower punch is a hollow cylinder and its thickness matches the cavity 13.

[0031] By setting the above scheme, the upper slider is driven by the upper main cylinder to press downward, and the lower slider is driven by the lower main cylinder to press upward, thereby achieving the effect of bidirectional pressing of powder products.

[0032] In Example 2, the lower punch 15 and the lower punch support 16 are specifically connected as follows: a first boss 17 protruding outward is provided on the top outer edge of the lower punch support 16, and a second boss 18 protruding outward is provided on the bottom outer edge of the lower punch 15. The first boss 17 and the second boss 18 are connected by a connecting cover 19.

[0033] from Figure 1 and Figure 3 It can be seen that the connecting cover 19 includes a left arc portion and a right arc portion, the cross-sections of the left arc portion and the right arc portion are in a bracket shape, threaded holes are symmetrically arranged on both sides of the outer side of the left arc portion near the right arc portion, and threaded holes matching the threaded holes are symmetrically arranged on both sides of the outer side of the right arc portion near the left arc portion.

[0034] Through the setting of this scheme, the lower punch support 16 is fixed on the lower slider, and then the first boss 17 set on the top of the lower punch support 16 and the second boss 18 set at the bottom of the lower punch 15 are connected through the connecting cover 19, and the lower punch 15 is fixed to the upper end of the lower punch support 16. When the lower punch 15 needs to be replaced, it is only necessary to unscrew the bolts on the connecting cover 19, and the lower punch 15 and the lower punch support 16 are separated so as to replace another set of molds.

[0035] Specifically, when changing the mold, first unscrew the connecting pressure cover 19 on the lower punch 15, then separate the core rod 12 from the core fixing column 14, replace the core, then replace the upper and lower punches, and finally replace the outer mold on the fixed plate. The outer mold, core and lower punch must all be replaced. These three are supporting equipment, but the thickness is changing, so the same applies to this hydraulic press.

[0036] Embodiment 3, as Figure 1As shown, the area of ​​the lower slider 7 is smaller than that of the fixed plate 9. The fixed plate 9 is provided with fixed support plates 21 at both ends along the height direction. The fixed support plates 21 extend downward to the lower cross beam and are fixedly connected to the lower cross beam 1. The provision of the fixed support plates 21 makes the fixed plate 9 more stable.

[0037] Embodiment 4, the upper table front and rear sides of the lower cross beam 1 are respectively provided with limit blocks 20 for limiting the falling of the lower slider 7. The limit blocks 20 ensure production safety.

[0038] The working process of the utility model is as follows: first, after the mold of the product to be pressed is installed, the lower die punch 15 rises to about 20mm higher than the bottom of the outer die 10. According to the size of the product pressed by different molds, the required powder filling is manually performed. After the material is filled into the die cavity 13, the upper die punch is put in, and the hydraulic system is started. The active end of the upper master cylinder 4 outputs, drives the upper slider downward, and presses the upper die into the die cavity 13. When it is pressed to the required position, the pressure is maintained. At this time, the output end of the lower master cylinder 6 drives the lower slider 7 upward, and the lower slider 7 moves upward along the guide rod 8, and is pressed into the die cavity 13 with the lower die punch 15. The lower slider is pressed with the same pressure as before. After a period of pressure maintenance, the upper master cylinder 4 retreats, drives the upper slider 5 to move upward, and the lower slider 7 continues to move upward. The lower die punch 15 ejects the upper die punch and the product to achieve automatic demolding.

[0039] If you need to change the mold, first open the outer mold sleeve flange 101, take out the outer mold, unscrew the mold core rod 12 and the mold core fixing column 14, take out the mold core, and then unscrew the bolts connecting the pressure cover 19, separate the left arc part and the right arc part, separate the lower die punch 15 and the lower die punch support 16, and then replace another set of molds. After installation, you can start pressing. When changing the mold, the outer mold sleeve flange 101, the mold core fixing column 14, the lower die punch support 16 and the connecting pressure cover 19 are the same and do not need to be replaced. You only need to replace the mold. Figure 3 and Figure 4 When pressing large-size products, the mold assembly in Figure 3 The middle mold assembly can be used when pressing small-sized products. Figure 4 The mold assembly in .

[0040] Through bidirectional pressing, not only can the product density be uniform and not easy to crack, but the automatic demoulding saves time and labor costs; the mold can also be replaced to achieve the pressing of products of different sizes.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A powder forming press for bidirectionally pressing annular products, comprising a lower crossbeam (1), a column (2), an upper crossbeam (3), an upper main cylinder (4), an upper slide block (5), a lower pressing component and a mold assembly, wherein four columns (2) extending upward are respectively arranged at the four corners of the lower crossbeam, an upper crossbeam (3) is fixedly arranged at the top of the column (2), an upper main cylinder (4) is arranged on the upper crossbeam (3), an upper slide block (5) is slidably connected to the column (2), the upper slide block (5) is between the lower crossbeam (1) and the upper crossbeam (3), and the upper slide block (5) is connected to the movable output end of the upper main cylinder (4), characterized in that: The pressing assembly comprises a lower master cylinder (6), a lower slider (7), a guide rod (8), and a fixing plate (9); a plurality of lower master cylinders (6) are embedded in the lower cross beam (1); a lower slider (7) is disposed at the movable end of the lower master cylinder (6); guide rods (8) are disposed at the four corners of the lower slider (7); and a fixing plate (9) is disposed at the top of the guide rod (8); The mold assembly comprises an outer mold (10), a mold core (11), a mold cavity (13), a mold core assembly, a lower mold punch (15) and a lower mold punch support (16); the center position of the fixed plate (9) passes through the outer mold (10) on which a hollow cylinder is fixed; The core assembly comprises a core (11), a core rod (12) and a core fixing column (14); the core (11) is arranged in the outer mold (10); a mold cavity (13) is formed between the inner wall of the hollow part of the outer mold (10) and the outer wall of the core (11); the lower part of the core (11) is fixedly connected to the core rod (12); the bottom of the core rod is threadedly connected to the core fixing column (14); a lower die punch support (16) is fixedly connected at the center position of the lower slider (7); the upper end of the lower die punch support is connected to the lower die punch (15); the lower die punch is a hollow cylinder and its thickness matches the mold cavity (13); the core fixing column (14) penetrates downward through the lower die punch (15) and the lower die punch support (16), and extends to the lower cross beam (1) to be fixedly connected to the lower cross beam (1).

2. A powder forming press for bidirectionally pressing annular products according to claim 1, characterized in that: A first boss (17) protruding outward is provided on the top outer edge of the lower die punch support (16), and a second boss (18) protruding outward is provided on the bottom outer edge of the lower die punch (15), and the first boss (17) and the second boss (18) are connected via a connecting cover (19).

3. A powder forming press for bidirectionally pressing annular products according to claim 2, characterized in that: The connecting gland (19) comprises a left arc portion and a right arc portion, the cross-sections of the left arc portion and the right arc portion are in a bracket shape, threaded holes are symmetrically arranged on both sides of the outer portion of the left arc portion near the right arc portion, and threaded holes matching the threaded holes are symmetrically arranged on both sides of the outer portion of the right arc portion near the left arc portion.

4. The powder forming press for bidirectionally pressing annular products according to claim 1, characterized in that: The area of ​​the lower sliding block (7) is smaller than that of the fixed plate (9). Fixed support plates (21) are provided at the left and right ends of the fixed plate (9) along the height direction. The fixed support plates (21) extend downward to the lower cross beam and are fixedly connected to the lower cross beam (1).

5. The powder forming press for bidirectionally pressing annular products according to claim 1, characterized in that: There are two lower master cylinders (6) which are symmetrically arranged.

6. A powder forming press for bidirectionally pressing annular products according to claim 4, characterized in that: Limit blocks (20) for limiting the falling of the lower sliding block (7) are respectively arranged on the front and rear sides of the upper table of the lower cross beam (1).

7. The powder forming press for bidirectionally pressing annular products according to claim 1, characterized in that: The outer mold (10), the mold core (11), and the lower mold punch (15) all have the same center.

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