A bar compacting isostatic pressing die

Abstract

A kind of bar compacting isostatic pressing mould, including outer sleeve, the end mould is equipped at both ends of outer sleeve, outer sleeve is the tubular structure made of polyurethane material, and both ends are open, and end mould is made of alloy, and it is used for the plugging of both ends of outer sleeve.The utility model discloses a position-adjustable plug is arranged on the inner side of end block, and the depth of the plug inserted into the outer sleeve is controlled to achieve the pressing forming operation of bar with different lengths and same diameters, thereby reducing the production cost and expanding the application range.If different lengths and diameters of bar need to be pressed and formed, the plug and the outer sleeve can be replaced synchronously to achieve the pressing forming.

Description

Technical Field

[0001] This utility model relates to the field of cemented carbide processing technology, and in particular to an isostatic pressing die for bar stock. Background Technology

[0002] When producing cemented carbide bars by cold isostatic pressing, the steel mold is often fixed in length, so a single set of molds can only produce bars of a single length. If bars of the same diameter but different lengths are to be pressed, the steel mold and the soft mold need to be changed, which increases the forming cost. Utility Model Content

[0003] This utility model provides an isostatic pressing mold for bar stock, which overcomes the shortcomings of the prior art and solves the problem that existing molds can only form bars of a single length, thus having strong practicality.

[0004] In order to achieve the purpose of this utility model, the following technology is proposed to be adopted:

[0005] An isostatic pressing die for bar stock includes an outer sleeve, with end molds at both ends of the outer sleeve;

[0006] The outer casing is a cylindrical structure made of polyurethane material, with openings at both ends;

[0007] The end mold is made of alloy and is used to seal both ends of the outer casing.

[0008] Furthermore, the end mold includes two identical end blocks located at both ends of the outer sleeve. A stepped hole is provided at the geometric center of the end block, and a screw is fixed in the stepped hole by threads. A plug is connected to the screw by threads, and the plug passes through both ends of the outer sleeve. At least two screws are provided on the end block, and a pair of fixing nuts are connected to each end of the screw by threads. One of the fixing nuts in each pair is located on the inner side of the end block, and the other fixing nut in each pair is located on the outer side of the end block.

[0009] Furthermore, the inner end of the plug has a tapered structure that is smaller on the inside and larger on the outside.

[0010] Furthermore, the inner end of the plug has an arc-shaped outer periphery.

[0011] Furthermore, the end mold is equipped with a clamping mechanism, which is used to fix the plug and the outer sleeve together.

[0012] Furthermore, the clamping mechanism includes multiple outward extension rods fixed to the outer wall of the end block. An end plate is fixed to the outer end of each outward extension rod. A lead screw is rotatably mounted at the geometric center of the end plate. An annular groove is opened at the outer end of the lead screw, which is located inside the end plate. An end head is fixed to the outer end of the lead screw. A threaded tube is threadedly connected to the lead screw. A movable seat is formed at the inner end of the threaded tube. Multiple outward extension arms are fixed on the movable seat. An inner pressure wheel is rotatably mounted at the outer end of each outward extension arm. Multiple guide sleeves are formed on the movable seat, and the guide sleeves are movably mounted on the outward extension rods.

[0013] The end block has multiple pairs of waist-shaped holes, and movable screws are installed in the waist-shaped holes. The inner end of each pair of movable screws is connected to an inner block by threads. The inner wall of the inner block is formed with an arc-shaped groove with an inward concave structure. The outer end of each pair of movable screws is connected to an outer moving plate by threads. The outer moving plate is located on the outer side of the end block, and the inner block is located on the inner side of the end block. An inner pressure support plate is welded on the outer moving plate. An inclined surface is formed on the outer wall of the inner pressure support plate, and the outer periphery of the inner pressure roller abuts against the inclined surface.

[0014] Furthermore, the inner wall of the arc-shaped groove of the inner block abuts against an inner pressure ring, the inner pressure ring having a notch, and the inner circumference of the inner pressure ring abutting against the outer sleeve.

[0015] Furthermore, inner plates are inserted on opposite sides of the end plate. The inner end of the inner plate is inserted into the annular groove. An outer plate is welded to the outer end of the inner plate. The inner wall of the outer plate abuts against opposite sides of the end plate. Pressure plates abut against both ends of the outer wall of the outer plate. An inner pressure screw passes through the outer end of the pressure plate. An inner pressure spring is sleeved on the outer end of the inner pressure screw. The inner end of the inner pressure spring abuts against the outer wall of the pressure plate. The inner pressure screw is threaded to opposite sides of the end plate.

[0016] The advantages of the above technical solution are:

[0017] This invention achieves the pressing and forming of rods of equal diameter but different lengths by setting an adjustable plug on the inner side of the end block and controlling the depth of its insertion into the outer sleeve. This reduces production costs and expands the scope of application. If pressing and forming of rods of different lengths and diameters is required, this can be achieved by simultaneously changing the plug and the outer sleeve.

[0018] This invention utilizes an inner pressure ring and an inner block that can move inward to compress the inner pressure ring, thereby ensuring that the inner circumference of the inner pressure ring is tightly pressed against the outer casing. This improves the connection stability between the outer casing and the plug, and the large contact area of ​​the inner pressure ring further enhances the tightness and sealing effect between the plug and the outer casing. Attached Figure Description

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will provide a further detailed description of this utility model in conjunction with the accompanying drawings.

[0020] Figure 1 A three-dimensional structural diagram of one embodiment is shown.

[0021] Figure 2 The three-dimensional structure of the clamp mechanism is shown. Figure 1 .

[0022] Figure 3 The three-dimensional structure of the clamp mechanism is shown. Figure 2 .

[0023] Figure 4 A magnified view of point A is shown.

[0024] Figure 5 A partial three-dimensional structural diagram of the clamp mechanism is shown.

[0025] Figure 6 The three-dimensional structure of the end mold is shown. Figure 1 .

[0026] Figure 7 The three-dimensional structure of the end mold is shown. Figure 2 . Detailed Implementation

[0027] like Figures 1-7 As shown, an isostatic pressing die for bar stock includes an outer sleeve 1, with end molds 2 at both ends of the outer sleeve 1. The outer sleeve 1 is a cylindrical structure made of polyurethane material with openings at both ends, and the end molds 2 are made of alloy and are used to seal the ends of the outer sleeve 1.

[0028] The end mold 2 includes two identical end blocks 20, located at both ends of the outer sleeve 1. Each end block 20 has a stepped hole at its geometric center, into which a screw 22 is threadedly fixed. A plug 23 is threadedly connected to each screw 22. The inner end of the plug 23 has a tapered structure (smaller inside, larger outside) or an arc-shaped structure on its outer periphery. The plug 23 passes through both ends of the outer sleeve 1. At least two screws 4 pass through the end blocks 20, with a pair of fixing nuts 40 threaded to each end of the screws 4. One fixing nut 40 in each pair is located inside the end block 20, and the other fixing nut 40 in each pair is located outside the end block 20.

[0029] The end mold 2 is provided with a clamping mechanism 3, which is used to fix the plug 23 and the outer sleeve 1.

[0030] The clamping mechanism 3 includes multiple outward extension rods 36 fixed to the outer wall of the end block 20. An end plate 37 is fixed to the outer end of the outward extension rods 36. A lead screw 38 is rotatably provided at the geometric center of the end plate 37. An annular groove 380 is provided at the outer end of the lead screw 38, which is located inside the end plate 37. An end head 381 is fixed at the outer end of the lead screw 38. A threaded tube 351 is threadedly connected to the lead screw 38. A movable seat is formed at the inner end of the threaded tube 351. Multiple outward extension arms 352 are fixed on the movable seat. An inner pressure wheel 353 is rotatably provided at the outer end of the outward extension arm 352. Multiple guide sleeves 354 are formed on the movable seat and are movably disposed on the outward extension rods 36.

[0031] The end block 20 has multiple pairs of oblong holes 21, and movable screws 30 are movably installed in the oblong holes 21. The inner end of each pair of movable screws 30 is threaded to an inner block 31. The inner wall of the inner block 31 is formed with an arc-shaped groove with a concave structure. The outer end of each pair of movable screws 30 is threaded to an outer moving plate 34. The outer moving plate 34 is located on the outer side of the end block 20, and the inner block 31 is located on the inner side of the end block 20. An inner pressure support plate 35 is welded to the outer moving plate 34. The outer wall of the inner pressure support plate 35 is formed with a slope 350. The outer periphery of the inner pressure roller 353 abuts against the slope 350. The inner wall of the arc-shaped groove of the inner block 31 abuts against an inner pressure ring 33. The inner pressure ring 33 has a notch, and the inner periphery of the inner pressure ring 33 abuts against the outer sleeve 1.

[0032] Inner plates 39 are inserted into the opposite sides of the end plate 37. The inner end of the inner plate 39 is inserted into the annular groove 380. An outer plate 390 is welded to the outer end of the inner plate 39. The inner wall of the outer plate 390 abuts against the opposite sides of the end plate 37. Pressure plates 392 abut against both ends of the outer wall of the outer plate 390. An inner pressure screw 391 is inserted through the outer end of the pressure plate 392. An inner pressure spring 393 is sleeved on the outer end of the inner pressure screw 391. The inner end of the inner pressure spring 393 abuts against the outer wall of the pressure plate 392. The inner pressure screw 391 is connected to the opposite sides of the end plate 37 by threads.

[0033] This embodiment mainly focuses on the pressing and forming of bars with equal diameter but unequal length. That is, the diameter of the outer jacket 1 provided in this embodiment is fixed, and it is only for forming bars of different lengths. Moreover, the length will not exceed the length of the outer jacket 1 itself. In other words, the length of the bar is limited by the length of the outer jacket 1. If the length of the bar exceeds the length of the outer jacket 1, an outer jacket 1 of other lengths is selected for forming.

[0034] Regarding the adjustment during the forming of bars of different lengths: the position of the plug 23 relative to the end block 20 is adjusted according to the length of the bar. During adjustment, the operator screws the plug 23 so that the plug 23 is closer to or further away from the end block 20.

[0035] As for the filling of alloy powder: Insert one of the plugs 23 into one end of the outer jacket 1, and fix the outer jacket 1 and the plug 23 by the clamping mechanism 3. Then inject the alloy powder into the outer jacket 1. After the injection is completed, insert the other plug 23 into the outer jacket 1, and fix the plug 23 and the outer jacket 1 by the clamping mechanism 3. After fixing, the operator inserts the screw 4 into the end block 20, and fixes the end block 20 by two pairs of fixing nuts 40. After completion, perform isostatic pressing.

[0036] Regarding the connection and fixing operation between the plug 23 and the outer sleeve 1 via the clamping mechanism 3: the operator inserts the lead screw 38 into the end plate 37, then inserts the inner insert plate 39 into the annular groove 380, and rotates the pressure plate 392 so that its inner wall abuts against the outer wall of the outer plate 390. After the lead screw 38 is inserted, it is connected to the threaded tube 351 by threads. Then, by rotating the lead screw 38, the threaded tube 351 and the inner pressure roller 353 are moved inward. The movement of the inner pressure roller 353 will act on the inclined surface 350, thereby causing the outer moving plate 34 and the inner block 31 to move inward, and their inner walls abut against the outer circumference of the inner pressure ring 33, and finally, the inner circumference of the inner pressure ring 33 abuts against the outer sleeve 1. It is worth noting that the detachable design of the lead screw 38 is mainly to facilitate the installation or adjustment of the screw 22.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A bar stock isostatic pressing die, characterized in that, Includes an outer jacket (1), with end molds (2) at both ends of the outer jacket (1); The outer casing (1) is a cylindrical structure made of polyurethane material, with openings at both ends; The end mold (2) is made of alloy and is used to seal both ends of the outer jacket (1).

2. The isostatic pressing die for bar stock according to claim 1, characterized in that, The end mold (2) includes two identical end blocks (20). The end blocks (20) are located at both ends of the outer sleeve (1). A stepped hole is provided at the geometric center of the end block (20). A screw (22) is fixed in the stepped hole by a thread. A plug (23) is connected to the screw (22) by a thread. The plug (23) passes through both ends of the outer sleeve (1). At least two screws (4) are passed through the end block (20). A pair of fixing nuts (40) are connected to both ends of the screws (4) by a thread. One of the fixing nuts (40) in each pair is located inside the end block (20), and the other fixing nut (40) in each pair is located outside the end block (20).

3. The isostatic pressing die for bar stock according to claim 2, characterized in that, The inner end of the plug (23) has a conical structure with a smaller inner end and a larger outer end.

4. The isostatic pressing die for bar stock according to claim 2, characterized in that, The inner end of the plug (23) has an arc-shaped structure.

5. The isostatic pressing die for bar stock according to claim 2, characterized in that, The end mold (2) is provided with a clamping mechanism (3), which is used for the abutment and fixation between the plug (23) and the outer sleeve (1).

6. The isostatic pressing die for bar stock according to claim 5, characterized in that, The clamping mechanism (3) includes multiple extension rods (36) fixed to the outer wall of the end block (20). An end plate (37) is fixed to the outer end of the extension rod (36). A lead screw (38) is rotatably provided at the geometric center of the end plate (37). An annular groove (380) is provided at the outer end of the lead screw (38). The annular groove (380) is located inside the end plate (37). An end head (381) is fixed to the outer end of the lead screw (38). A threaded tube (351) is connected to the lead screw (38) by a thread. A movable seat is formed at the inner end of the threaded tube (351). Multiple extension arms (352) are fixed on the movable seat. An inner pressure wheel (353) is rotatably provided at the outer end of the extension arm (352). Multiple guide sleeves (354) are formed on the movable seat. The guide sleeves (354) are movably provided on the extension rod (36). The end block (20) has multiple pairs of waist-shaped holes (21), and movable screws (30) are movably installed in the waist-shaped holes (21). The inner end of each pair of movable screws (30) is connected to an inner block (31) by a thread. The inner wall of the inner block (31) is formed with an arc-shaped groove with a concave structure. The outer end of each pair of movable screws (30) is connected to an outer moving plate (34) by a thread. The outer moving plate (34) is located on the outer side of the end block (20), and the inner block (31) is located on the inner side of the end block (20). An inner pressure support plate (35) is welded on the outer moving plate (34). An inclined surface (350) is formed on the outer wall of the inner pressure support plate (35), and the outer periphery of the inner pressure wheel (353) abuts against the inclined surface (350).

7. The isostatic pressing die for bar stock according to claim 6, characterized in that, The inner wall of the arc groove of the inner block (31) abuts against the inner pressure ring (33), the inner pressure ring (33) has a notch, and the inner circumference of the inner pressure ring (33) abuts against the outer sleeve (1).

8. The isostatic pressing die for bar stock according to claim 6, characterized in that, An inner plate (39) is inserted on the opposite sides of the end plate (37). The inner end of the inner plate (39) is inserted into the annular groove (380). An outer plate (390) is welded to the outer end of the inner plate (39). The inner wall of the outer plate (390) abuts against the opposite sides of the end plate (37). The outer ends of the outer wall of the outer plate (390) abut against the pressure plate (392). An inner pressure screw (391) is inserted through the outer end of the pressure plate (392). An inner pressure spring (393) is sleeved on the outer end of the inner pressure screw (391). The inner end of the inner pressure spring (393) abuts against the outer wall of the pressure plate (392). The inner pressure screw (391) is connected to the opposite sides of the end plate (37) by thread.

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