Wet-type cold isostatic pressing forming die for hollowed-out sheet parts

Abstract

The utility model discloses a hollow sheet part wet-type cold isostatic pressing forming die, which relates to the technical field of powder compression forming dies, and comprises a sheath, support legs are fixedly mounted at the corners of the lower end of the sheath, a lower base plate is mounted at the upper end of the sheath, a positioning groove is formed in the middle of the lower base plate, and the lower base plate is connected with the positioning groove. A positioning groove is formed in the lower base plate, a special-shaped mold core is installed at the upper end of the positioning groove, the outer side wall of the special-shaped mold core is slidably connected with an upper cover plate, the upper cover plate is located above the lower base plate, a powder containing cavity is formed between the upper cover plate and the lower base plate, and a rubber plug is installed at the upper end of the upper cover plate; by means of the split design of the lower base plate and the special-shaped mold core, after isostatic pressing machining is completed, the special-shaped mold core and a lower base plate body are separated, a rotating handle is rotated, so that a threaded rod moves upwards, then the lower base plate moves upwards, finally, a shaped blank leaves the interior of the wrapping sleeve, and rapid demolding and discharging of the shaped blank are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder pressing and forming dies, in particular to a wet cold isostatic pressing dies for hollow thin plate parts. Background Art

[0002] The wet cold isostatic pressing process is to place the processed metal or ceramic powder in an elastic mold and seal it, and use the static pressure of high-pressure liquid to directly act on the elastic mold. The powder in the elastic mold is subjected to the same pressure in all directions and is pressed into a preform. The wet cold isostatic pressing mold for special-shaped through-hole parts recorded in the patent with the existing patent announcement number CN217803526U is composed of an upper cover plate, a lower cover plate, a special-shaped core, a rubber sleeve and a pull rod. The inner surface of the rubber sleeve, the side surface of the core body, the lower end face of the upper cover plate and the upper end face of the lower cover plate form a powder holding cavity. When it is necessary to prepare a product with a special-shaped through hole, the powder is placed in the powder holding cavity, and then the entire mold is placed in a steel cylinder for hydraulic molding. However, the above-mentioned mold produces the preform by sealing the powder hydraulically, and the preform is adhered to the mold, which is not conducive to demolding and unloading by the staff.

[0003] Based on this, a wet cold isostatic pressing mold for hollow thin plate parts is now provided, which can eliminate the disadvantages of the existing devices. Utility Model Content

[0004] The utility model aims to provide a wet cold isostatic pressing mold for hollow thin plate parts, so as to solve the problem in the background technology that the blank and the mold are adhered to each other, which is not conducive to demoulding and unloading by workers.

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

[0006] A wet cold isostatic pressing mold for hollow thin plate parts comprises a sleeve, a leg is fixedly installed at the corner of the lower end of the sleeve, a lower pad is installed at the upper end of the sleeve, a positioning groove is provided in the middle of the lower pad, a special-shaped core is installed at the upper end of the positioning groove, the outer side wall of the special-shaped core is slidably connected to an upper cover plate, the upper cover plate is located above the lower pad plate, a powder containing cavity is formed between the upper cover plate and the lower pad plate, a rubber plug is installed at the upper end of the upper cover plate; a demoulding structure is arranged at the lower end of the sleeve for quickly demoulding the blank.

[0007] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In an optional scheme: the demolding structure includes a threaded hole, which is opened in the middle position of the lower end of the sleeve, the inner wall of the threaded hole is threadedly connected to the outer wall of the threaded rod, the upper end of the threaded rod is fixedly connected to the rotating block, the outer wall of the rotating block is rotatably connected to the rotating groove, the rotating groove is opened in the middle position of the lower end of the lower pad, and a turning handle is fixedly installed at the lower end of the rotating block.

[0009] In an optional solution: the cross-section of the rotating groove and the rotating block is a T-shaped structure.

[0010] In an optional solution: a movable groove is provided in the middle of the lower end of the rubber plug, the inner wall of the movable groove is slidably connected to the special-shaped core, and there is an adjustment space between the movable groove and the special-shaped core.

[0011] In an optional solution: positioning holes are formed around the upper end of the sleeve, and positioning blocks matching the positioning holes are fixedly mounted on the side walls around the rubber plug.

[0012] In an optional solution: a plurality of elastic cable ties are sleeved on the outer surface of the sleeve.

[0013] In an optional solution: the outer side wall of the special-shaped core is polished.

[0014] In an optional solution: a pull ring is fixedly installed at the middle position of the upper end of the rubber plug, and ears are fixedly installed around the sleeve.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The utility model separates the lower pad and the special-shaped core into a separate design. After the isostatic pressing process is completed, the special-shaped core and the lower pad body are separated. By turning the handle, the threaded rod moves upward, and then the lower pad moves upward, and finally the blank leaves the inside of the sleeve, so that the blank can be quickly demolded and unloaded.

[0017] 2. The utility model can ensure that all parts are connected as a whole through interference fit between the outer surface of the lower pad, the outer surface of the upper cover plate, the outer surface of the rubber plug and the inner surface of the sleeve, which is convenient for subsequent mold handling; the positioning groove cooperates with the special-shaped core, and the special-shaped core will not shake and be accurately positioned during the powder loading stage after the positioning groove and the special-shaped core are assembled, and the powder will not enter between the upper surface of the positioning groove and the lower surface of the special-shaped core during the subsequent handling process; the inner surface of the upper cover plate and the outer surface of the special-shaped core have a clearance fit, and during the isostatic pressing of the powder, the upper cover plate and the special-shaped core will have a relative displacement in the longitudinal direction. The use of clearance fit can make the longitudinal displacement proceed smoothly, so that the intersection between the lower surface of the upper cover plate and the outer surface of the special-shaped core is filled more tightly, and the preformed blank after isostatic pressing will not have cracks at the edges and corners.

[0018] 3. The utility model has a simple structure, and the flatness tolerance of the produced thin plate preform is small. The one-time forming of the hollow feature can reduce material consumption, machining tools, tooling and labor costs, etc., and can reduce material consumption and machining hours. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a structural schematic diagram of the bottom end of the utility model.

[0021] Figure 3 It is a structural schematic diagram of each internal structural position of the utility model.

[0022] Figure 4 It is a schematic diagram of the structure inside the package of the utility model.

[0023] Figure 5 It is a structural schematic diagram of the demoulding structure position of the utility model.

[0024] Figure 6 It is a structural schematic diagram of the position of the rubber plug of the utility model.

[0025] Notes on the accompanying drawings: 11. Sleeve; 12. Lifting ear; 13. Leg; 14. Threaded hole; 15. Lower pad; 16. Rotating groove; 17. Rotating block; 18. Threaded rod; 19. Turning handle; 20. Positioning groove; 21. Special-shaped core; 22. Powder containing chamber; 23. Upper cover plate; 24. Rubber plug; 25. Movable groove; 26. Pull ring; 27. Positioning block; 28. Positioning hole; 29. ​​Elastic cable tie. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] Example 1

[0028] In one embodiment, Figure 1-Figure 6 As shown, a wet cold isostatic pressing mold for hollow thin plate parts includes a sleeve 11, a leg 13 is fixedly installed at the corner of the lower end of the sleeve 11, a lower pad 15 is installed on the upper end of the sleeve 11, a positioning groove 20 is opened in the middle of the lower pad 15, a special-shaped core 21 is installed on the upper end of the positioning groove 20, the outer side wall of the special-shaped core 21 is slidably connected to the upper cover plate 23, the upper cover plate 23 is located above the lower pad 15, a powder containing cavity 22 is between the upper cover plate 23 and the lower pad 15, and a rubber plug 24 is installed on the upper end of the upper cover plate 23; a demoulding structure is arranged at the lower end of the sleeve 11 for quickly demoulding the blank.

[0029] In this embodiment, the lower pad 15 is placed with the side with the positioning groove 20 facing upward inside the sleeve 11, and the special-shaped core 21 is placed in the positioning groove 20. Powder is poured into the powder containing cavity 22 formed by the outer surface of the special-shaped core 21, the upper surface of the lower pad 15 and the inner surface of the sleeve 11. After the powder is basically leveled, it is compacted by mechanical vibration, and then the upper cover plate 23 is placed on top of the powder and compacted. Finally, the plug 24 is installed in the sleeve 11, and then the mold is placed in a cold isostatic press. After the powder is compacted and formed under the action of hydraulic pressure, the mold is hoisted out of the cold isostatic press, and then the upper plug 24, the upper cover plate 23 and the special-shaped core 21 of the sleeve 11 are removed, and the blank is quickly demolded by the demolding structure.

[0030] In one embodiment, Figure 4 and Figure 5 As shown, the demoulding structure includes a threaded hole 14, which is opened in the middle position of the lower end of the sleeve 11, and the inner wall of the threaded hole 14 is threadedly connected to the outer wall of the threaded rod 18. The upper end of the threaded rod 18 is fixedly connected to a rotating block 17, and the outer wall of the rotating block 17 is rotatably connected to a rotating groove 16. The rotating groove 16 is opened in the middle position of the lower end of the lower pad 15, and a turning handle 19 is fixedly installed at the lower end of the rotating block 17.

[0031] Since the inner wall of the threaded hole 14 is threadedly connected to the outer wall of the threaded rod 18, the threaded rod 18 can be moved longitudinally by turning the handle 19. When the blank needs to be demolded, the staff removes the rubber plug 24 and the upper cover plate 23 in turn, and then turns the handle 19 to move the threaded rod 18 upward, thereby moving the lower pad 15 upward, and finally allowing the blank to leave the inside of the sleeve 11, thereby achieving rapid demolding and unloading of the blank, which is convenient for the staff to operate.

[0032] In one embodiment, Figure 5 As shown, the cross section of the rotating groove 16 and the rotating block 17 is a T-shaped structure.

[0033] By designing the cross sections of the rotating groove 16 and the rotating block 17 to be T-shaped, the rotating groove 16 and the rotating block 17 are prevented from being separated from each other, and thus the demoulding structure can operate stably.

[0034] In one embodiment, Figure 3 and Figure 6 As shown, a movable groove 25 is provided in the middle of the lower end of the rubber plug 24 , and the inner wall of the movable groove 25 is slidably connected to the special-shaped core 21 , and there is an adjustment space between the movable groove 25 and the special-shaped core 21 .

[0035] The outer surface of the special-shaped core 21 and the inner surface of the movable groove 25 are in a sliding fit. During the isostatic pressing of the powder, the upper cover plate 23 and the special-shaped core 21 will produce relative displacement in the longitudinal direction. The purpose of the sliding fit is to avoid the rubber plug 24 from generating resistance to the relative displacement between the upper cover plate 23 and the movable groove 25. The purpose of the movable groove 25 is to leave space for the relative displacement between the upper cover plate 23 and the special-shaped core 21.

[0036] In one embodiment, Figure 1 and Figure 4 As shown, positioning holes 28 are formed around the upper end of the package sleeve 11 , and positioning blocks 27 matching the positioning holes 28 are fixedly mounted on the side walls around the rubber plug 24 .

[0037] The positioning block 27 cooperates with the positioning hole 28 so that the outer wall of the rubber plug 24 fits with the package sleeve 11, ensuring that the blank can be smoothly formed after the isostatic pressing process is completed.

[0038] Example 2

[0039] In one embodiment, Figure 1 and Figure 2 As shown, a plurality of elastic straps 29 are sleeved on the outer surface of the sheath 11 .

[0040] By sleeved with a plurality of elastic tie bands 29 on the outer surface of the package 11, a certain force is applied to the side wall of the package 11, so that the powder containing cavity 22 is filled with powder more compactly, ensuring that the blank can be smoothly formed after the isostatic pressing process is completed.

[0041] In one embodiment, Figure 3 As shown, the outer side wall of the special-shaped core 21 is polished.

[0042] By performing polishing on the outer side wall of the special-shaped core 21 , the surface of the outer side wall of the special-shaped core 21 is made smooth, which is conducive to the separation of the blank and the special-shaped core 21 from each other in the later stage.

[0043] In one embodiment, Figure 1 , Figure 2 and Figure 3 As shown, a pull ring 26 is fixedly installed at the middle position of the upper end of the rubber plug 24, and ears 12 are fixedly installed around the package sleeve 11.

[0044] The pull ring 26 is provided to facilitate the separation of the rubber plug 24 and the package sleeve 11 , and the ear 12 is provided to facilitate the transportation of the mold.

[0045] The above embodiment discloses a wet cold isostatic pressing mold for hollow thin plate parts, wherein the lower pad 15 is placed with the positioning groove 20 facing upward inside the sleeve 11, the special-shaped core 21 is placed in the positioning groove 20, and powder is poured into the powder accommodating cavity 22 formed by the outer surface of the special-shaped core 21, the upper surface of the lower pad 15 and the inner surface of the sleeve 11. After the powder is basically leveled, the powder is compacted by mechanical vibration, and then the upper cover plate 23 is placed on the powder and compacted. Finally, The rubber plug 24 is installed into the sleeve 11, and then the mold is placed in a cold isostatic press. After the powder is compacted and formed under the action of hydraulic pressure, the mold is lifted out of the cold isostatic press using the lifting lug 12, and then the rubber plug 24, the upper cover plate 23, and the special-shaped core 21 at the upper end of the sleeve 11 are removed. Subsequently, the threaded rod 18 is moved upward by turning the handle 19, and then the lower pad 15 is moved upward, and finally the blank is removed from the sleeve 11, so that the blank can be quickly demolded and discharged.

[0046] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wet cold isostatic pressing mold for hollow thin plate parts, comprising a sleeve (11), a leg (13) fixedly mounted at a corner of the lower end of the sleeve (11), a lower pad (15) mounted at the upper end of the sleeve (11), a positioning groove (20) provided in the middle of the lower pad (15), a special-shaped core (21) mounted at the upper end of the positioning groove (20), an outer side wall of the special-shaped core (21) slidably connected to an upper cover plate (23), the upper cover plate (23) being located above the lower pad (15), a powder containing cavity (22) being provided between the upper cover plate (23) and the lower pad (15), and a rubber plug (24) mounted at the upper end of the upper cover plate (23); It is characterized in that It also includes a demoulding structure, which is arranged at the lower end of the sleeve (11) and is used to quickly demould the blank; The demoulding structure comprises a threaded hole (14), the threaded hole (14) being arranged at a middle position of the lower end of the sleeve (11), the inner wall of the threaded hole (14) being threadedly connected to the outer wall of the threaded rod (18), the upper end of the threaded rod (18) being fixedly connected to a rotating block (17), the outer wall of the rotating block (17) being rotatably connected to a rotating groove (16), the rotating groove (16) being arranged at a middle position of the lower end of the lower pad (15), and a turning handle (19) being fixedly mounted at the lower end of the rotating block (17).

2. The wet cold isostatic pressing mold for hollow thin plate parts according to claim 1, characterized in that: The cross-sections of the rotating groove (16) and the rotating block (17) are T-shaped structures.

3. The wet cold isostatic pressing mold for hollow thin plate parts according to claim 1, characterized in that: A movable groove (25) is provided in the middle of the lower end of the rubber plug (24); the inner wall of the movable groove (25) is slidably connected to the special-shaped core (21); and an adjustment space is provided between the movable groove (25) and the special-shaped core (21).

4. The wet cold isostatic pressing mold for hollow thin plate parts according to claim 1, characterized in that: Positioning holes (28) are formed around the upper end of the sleeve (11), and positioning blocks (27) matching the positioning holes (28) are fixedly mounted on the side walls around the rubber plug (24).

5. The wet cold isostatic pressing mold for hollow thin plate parts according to claim 1, characterized in that: A plurality of elastic cable ties (29) are sleeved on the outer surface of the sleeve (11).

6. The wet cold isostatic pressing mold for hollow thin plate parts according to claim 1, characterized in that: The outer side wall of the special-shaped core (21) is polished.

7. The wet cold isostatic pressing mold for hollow thin plate parts according to claim 1, characterized in that: A pull ring (26) is fixedly mounted at the middle position of the upper end of the rubber plug (24), and lifting ears (12) are fixedly mounted around the periphery of the sleeve (11).

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