Stamping die for powder metallurgy parts

Abstract

The utility model provides a stamping die for powder metallurgy parts, and belongs to the technical field of stamping dies. The problem that a traditional stamping die needs to be provided with an additional material taking mechanism, and the maintenance cost is increased is mainly solved. According to the technical scheme, the stamping die comprises a bottom plate, the top of the bottom plate is connected with a supporting plate through multiple sets of stand columns, a first mounting hole is formed in the top of the bottom plate, a lower stamping assembly is arranged on the first mounting hole and comprises multiple sets of positioning columns, the multiple sets of positioning columns are arranged between the bottom plate and the supporting plate, and a second mounting hole is formed in the bottom of the supporting plate. An upper die stamping assembly is arranged at the bottom of the second mounting hole, and a middle die assembly is arranged between the upper die stamping assembly and the lower die stamping assembly; through the arrangement of the upper die stamping assembly and the middle die assembly, after stamping is completed, a stamped workpiece in the stamping through cavity can be ejected out through the inner upper die stamping piece, the problems that a traditional stamping die needs to be provided with an additional material taking mechanism, and the maintenance cost is increased are solved, and the economical efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of stamping dies, and more specifically, particularly relates to a stamping die for powder metallurgy parts. Background Art

[0002] Powder metallurgy technology can be used to perform precision forming processing on various metal materials, which facilitates the production of many small parts. In the manufacturing process of powder metallurgy parts, stamping forming of powder metallurgy parts is currently the most widely used processing method. The stamping die applies pressure to the metal powder to form it into the desired shape.

[0003] For example, the Chinese utility model patent with patent number 202022416083.6 provides a stamping die for powder metallurgy parts. The stamping die is provided with a die cavity, a lower punch device and an upper punch device. When in use, the material is added into the die cavity, and then the lower punch device and the upper punch device are started to press the material in the die cavity at the same time; however, the traditional stamping die requires the use of a material taking mechanism to take out the pressed material, which increases the complexity of the stamping die and increases the maintenance cost. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a powder metallurgy parts stamping die to solve the technical problem in the prior art that traditional stamping dies need to use a material taking mechanism to take out the pressed materials, which increases the complexity of the stamping die and increases the maintenance cost.

[0005] The purpose and function of the stamping die for powder metallurgy parts of the utility model are achieved by the following specific technical means:

[0006] A stamping die for powder metallurgy parts comprises a base plate, the top of the base plate is connected to a support plate via multiple groups of columns, a first mounting hole is provided at the top of the base plate, a lower die punch assembly is arranged on the first mounting hole, the lower die punch assembly comprises multiple groups of positioning columns, multiple groups of positioning columns are arranged between the base plate and the support plate, a second mounting hole is provided at the bottom of the support plate, an upper die punch assembly is arranged at the bottom of the second mounting hole, and a middle die assembly is arranged between the upper die punch assembly and the lower die punch assembly.

[0007] According to a preferred embodiment, the lower die punch assembly also includes an outer lower die punch, the outer lower die punch is arranged on the top of the base plate, a slot is opened on the top of the outer lower die punch, and multiple groups of positioning columns are fixedly connected to the bottom of the slot.

[0008] According to a preferred embodiment, a first hydraulic cylinder is arranged at the bottom of the first mounting hole, a through hole is opened at the bottom of the slot corresponding to the first mounting hole, and a hydraulic rod of the first hydraulic cylinder passes through the first mounting hole and is connected to an inner lower die punching piece with the through hole.

[0009] According to a preferred embodiment, fixing seats are provided on both sides of the outer lower die punch, and two groups of the fixing seats are fixedly connected to the bottom plate by screws.

[0010] According to a preferred embodiment, the upper die punch assembly includes an outer upper die punch, the outer upper die punch is arranged at the bottom of the support plate, and a through cavity is opened at the top of the outer upper die punch.

[0011] According to a preferred embodiment, the upper die punch assembly further includes a second hydraulic cylinder, the second hydraulic cylinder is disposed at the top of the second mounting hole, and the hydraulic rod of the second hydraulic cylinder passes through the second mounting hole and is connected to an inner upper die punch.

[0012] According to a preferred embodiment, the inner upper die punch is inserted into the through cavity, and limit plates are provided on the top and bottom of the outer upper die punch, and limit holes are provided on both sets of the limit plates corresponding to the through cavity.

[0013] According to a preferred embodiment, the middle mold assembly includes a middle mold part, which is arranged between the base plate and the support plate, and a stamping cavity is opened on the top of the middle mold part. The middle mold part, the outer upper mold punching part and the two groups of limit plates are all provided with multiple groups of positioning holes, and the multiple groups of positioning columns are respectively inserted into the multiple groups of positioning holes.

[0014] According to a preferred embodiment, a plurality of groups of adsorption parts are arranged on the top of the middle mold, and a plurality of groups of installation grooves are opened at the bottom of the outer upper mold punch corresponding to the plurality of groups of adsorption parts, and electromagnets are arranged in the plurality of groups of installation grooves.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. Through the setting of the upper die punch assembly and the middle die assembly, when the stamping die is used, multiple groups of adsorption parts can be adsorbed by multiple groups of electromagnets, and then the stamped workpiece in the stamping cavity can be ejected through the second hydraulic cylinder and the inner upper die punch, which solves the problem that the traditional stamping die needs to adopt an additional material removal mechanism, which increases the complexity of the stamping die and reduces the cost of equipment and maintenance.

[0017] 2. The stamping die adopts modular design, and the lower die punch assembly, upper die punch assembly and middle die assembly are designed as independent modules respectively; the corresponding connection between different modules is realized through positioning by the bottom plate, column, support plate and positioning column. This modular design allows each module to be easily assembled and disassembled, which improves the flexibility of the stamping die; when the die is repaired and the module is replaced, it can be done quickly and efficiently. At the same time, modularization also increases the reuse rate of the die; when a module is damaged, only the module needs to be replaced without replacing the entire die, which further saves costs and improves economy.

[0018] 3. Through the setting of electromagnets and adsorption parts, when using the stamping die, multiple groups of adsorption parts are arranged on the top of the middle mold, and corresponding positions, mounting grooves and electromagnets are arranged under the outer upper mold punching parts, which can ensure the positioning and fastening fit of the middle mold and the outer upper mold punching parts during the stamping process; under high pressure, the powder material is easy to move, but this can be prevented by electromagnetic adsorption, ensuring that the powder material is formed in the correct position and improving stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a stamping die for a powder metallurgy part of the utility model;

[0020] Figure 2 This is an exploded view of a stamping die for a powder metallurgy part of the utility model;

[0021] Figure 3 This is a schematic structural diagram of a powder metallurgy parts stamping die after the lower die punch component and the middle die component are assembled;

[0022] Figure 4 for Figure 3 Schematic diagram of the structure after splitting;

[0023] Figure 5 This is a schematic diagram of the structure of the lower punch assembly after assembly in a stamping die for a powder metallurgy part of the utility model;

[0024] Figure 6 for Figure 5 Schematic diagram of the structure after decomposition.

[0025] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0026] 11. Base plate; 12. Post; 13. Support plate; 14. First mounting hole; 15. Second mounting hole; 21. Positioning post; 22. Outer lower die punch; 23. Slot; 24. First hydraulic cylinder; 25. Inner lower die punch; 26. Fixed seat; 31. Outer upper die punch; 32. Through cavity; 33. Second hydraulic cylinder; 34. Inner upper die punch; 36. Limiting plate; 37. Limiting hole; 41. Middle die; 42. Stamping through cavity; 43. Positioning hole; 44. Adsorption part; 45. Mounting slot; 46. Electromagnet. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0028] Example:

[0029] As attached Figure 1 To Attachment Figure 6 As shown:

[0030] The utility model provides a stamping die for powder metallurgy parts, including a bottom plate 11, the top of which is connected to a support plate 13 through multiple groups of columns 12; a first mounting hole 14 is also provided on the top of the bottom plate 11, a lower die punch assembly is provided on the first mounting hole 14, the lower die punch assembly includes multiple groups of positioning columns 21, and the multiple groups of positioning columns 21 are installed between the bottom plate 11 and the support plate 13; a second mounting hole 15 is provided at the bottom of the support plate 13, and an upper die punch assembly is provided at the bottom of the second mounting hole 15. A middle die assembly is provided between the upper die punch assembly and the lower die punch assembly, and the middle die assembly is used to coordinate the movement of the upper and lower die punch assemblies to ensure the smooth progress of the stamping process.

[0031] Please refer to Figure 2 , Figure 3 and Figure 4 As shown, the lower die punch assembly also includes an outer lower die punch 22, which is arranged on the top of the base plate 11. A slot 23 is provided on the top of the outer lower die punch 22, and multiple groups of positioning columns 21 are fixedly connected to the bottom of the slot 23; through the multiple groups of positioning columns 21, the upper die punch assembly, the middle die assembly and the lower die punch assembly can be positioned, thereby effectively preventing displacement during the stamping process, ensuring that the various components of the mold can be accurately aligned, and improving the accuracy and consistency of the stamping.

[0032] Please refer to Figure 3 and Figure 4As shown, a first hydraulic cylinder 24 is installed at the bottom of the first mounting hole 14. At the same time, a through hole is opened at the bottom of the slot 23 corresponding to the first mounting hole 14. The hydraulic rod of the first hydraulic cylinder 24 passes through the first mounting hole 14 and the through hole, and is connected to the inner lower die punch 25. The function of the inner lower die punch 25 is to stamp and form metal powder. When the first hydraulic cylinder 24 is working, its hydraulic rod will push the inner lower die punch 25 to move upward, thereby applying pressure to the metal powder placed in the middle die assembly to form it into a desired shape. The first hydraulic cylinder 24 provides a powerful power source that can meet the high pressure requirements required for stamping.

[0033] Please refer to Figure 4 As shown, fixing seats 26 are provided on both sides of the outer lower die stamping 22, and the two sets of fixing seats 26 are fixedly connected to the base plate 11 by screws; the strength of the entire structure is increased, making the stamping die more stable and reliable during use. The presence of the fixing seats 26 provides additional support and fixing points, effectively sharing the pressure and impact force borne by the outer lower die stamping 22, and can prevent the die from deformation or displacement during the stamping process.

[0034] Please refer to Figure 2 , Figure 5 and Figure 6 As shown, the upper die punch assembly includes an outer upper die punch 31, the outer upper die punch 31 is arranged at the bottom of the support plate 13, and a through cavity 32 is opened at the top of the outer upper die punch 31; the upper die punch assembly also includes a second hydraulic cylinder 33, and the second hydraulic cylinder 33 is arranged at the top position of the second mounting hole 15, and the hydraulic rod of the second hydraulic cylinder 33 passes through the second mounting hole 15 and is connected with the inner upper die punch 34; the function of the inner upper die punch 34 is to stamp and form the metal powder; when the second hydraulic cylinder 33 is working, its hydraulic rod will generate a downward thrust, which is transmitted to the inner upper die punch 34. The inner upper die punch 34 is subjected to the thrust and will exert pressure on the metal powder placed in the mold to cause it to deform; this stamping process is achieved by the cooperation of the second hydraulic cylinder 33 and the inner upper die punch 34 in the upper die punch assembly; the second hydraulic cylinder 33 provides a power source, and the inner upper die punch 34 is the part that directly contacts the metal powder, and pressure is applied to form it into the desired shape.

[0035] Please refer to Figure 5 and Figure 6As shown, an inner upper die punch 34 is passed through the through cavity 32. In order to ensure the position of the inner upper die punch 34 in the through cavity 32, limit plates 36 are provided on the top and bottom of the outer upper die punch 31. Limit holes 37 are provided on these two sets of limit plates 36 corresponding to the through cavity 32. Through the coordinated action of these two sets of limit plates 36, the movement range of the inner upper die punch 34 in the through cavity 32 is clearly defined, which effectively prevents the inner upper die punch 34 from unnecessary displacement or deviation during the stamping process, thereby ensuring the accuracy and stability of the stamping operation.

[0036] Please refer to Figure 2 , Figure 3 and Figure 4 As shown, the middle mold assembly includes a middle mold part 41, which is arranged between the bottom plate 11 and the support plate 13, and a punching cavity 42 is provided on the top of the middle mold part 41, which provides space for the punching of metal powder; in the punching cavity 42, the metal powder will be punched, and the desired shape and structure will be formed by applying pressure and impact force; in order to ensure the accuracy and stability of the middle mold assembly, multiple groups of positioning holes 43 are provided on the middle mold part 41, the outer upper mold punch 31 and the two groups of limit plates 36. The existence of these positioning holes 43 enables the various parts of the middle mold assembly to be aligned; multiple groups of positioning columns 21 pass through the multiple groups of positioning holes 43 respectively, which enhances the overall stability of the middle mold assembly, and these positioning columns 21 play the role of fixing and supporting, ensuring the accuracy of the position and posture of the middle mold assembly during the punching process.

[0037] Please refer to Figure 2 , Figure 3 and Figure 4 As shown, a plurality of adsorption members 44 are arranged on the top of the middle mold 41, and the design of these adsorption members 44 is intended to cooperate with the plurality of mounting grooves 45 corresponding to the bottom of the outer upper mold punch 31; electromagnets 46 are arranged inside the plurality of mounting grooves 45, and when the stamping operation is performed, the plurality of electromagnets 46 will play their role to adsorb and fix the plurality of adsorption members 44, so that the middle mold 41 and the outer upper mold punch 31 can fit tightly, ensuring that the metal powder is formed in the stamping cavity 42; after the stamping process is completed, the inner lower mold punch 25 starts to move downward, and the inner upper mold punch 34 also moves downward to push the stamped workpiece out of the stamping cavity 42; so that the stamping mold does not need an additional piece removal mechanism, which solves the problem that the traditional stamping mold is more complex and has higher maintenance costs.

[0038] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A stamping die for powder metallurgy parts, characterized in that: The invention comprises a bottom plate (11), the top of the bottom plate (11) is connected to a support plate (13) via a plurality of groups of columns (12), a first mounting hole (14) is provided at the top of the bottom plate (11), a lower die punch assembly is arranged on the first mounting hole (14), the lower die punch assembly comprises a plurality of groups of positioning columns (21), a plurality of groups of positioning columns (21) are arranged between the bottom plate (11) and the support plate (13), a second mounting hole (15) is provided at the bottom of the support plate (13), an upper die punch assembly is arranged at the bottom of the second mounting hole (15), and a middle die assembly is arranged between the upper die punch assembly and the lower die punch assembly.

2. A powder metallurgy parts stamping die as claimed in claim 1, characterized in that: The lower die punch assembly also includes an outer lower die punch (22), the outer lower die punch (22) is arranged on the top of the bottom plate (11), a slot (23) is opened on the top of the outer lower die punch (22), and multiple groups of positioning columns (21) are fixedly connected to the bottom of the slot (23).

3. A powder metallurgy parts stamping die as claimed in claim 2, characterized in that: A first hydraulic cylinder (24) is arranged at the bottom of the first mounting hole (14), a through hole is opened at the bottom of the clamping slot (23) corresponding to the first mounting hole (14), and a hydraulic rod of the first hydraulic cylinder (24) passes through the first mounting hole (14) and is connected to an inner lower die punch (25) through the through hole.

4. A powder metallurgy parts stamping die as claimed in claim 3, characterized in that: Fixed seats (26) are provided on both sides of the outer lower die punch (22), and two groups of the fixed seats (26) are fixedly connected to the bottom plate (11) by screws.

5. A powder metallurgy parts stamping die as claimed in claim 1, characterized in that: The upper die punch assembly comprises an outer upper die punch (31), the outer upper die punch (31) is arranged at the bottom of the support plate (13), and a through cavity (32) is opened at the top of the outer upper die punch (31).

6. A powder metallurgy parts stamping die as claimed in claim 5, characterized in that: The upper die punch assembly also includes a second hydraulic cylinder (33), the second hydraulic cylinder (33) is arranged at the top of the second mounting hole (15), and the hydraulic rod of the second hydraulic cylinder (33) passes through the second mounting hole (15) and is connected to the inner upper die punch (34).

7. A powder metallurgy parts stamping die as claimed in claim 6, characterized in that: The inner upper die punch (34) is inserted into the through cavity (32), and the top and bottom of the outer upper die punch (31) are both provided with limit plates (35), and limit holes (36) are provided on the two sets of limit plates (35) corresponding to the through cavity (32).

8. A powder metallurgy parts stamping die as claimed in claim 7, characterized in that: The middle mold assembly comprises a middle mold part (41), the middle mold part (41) is arranged between the bottom plate (11) and the support plate (13), a stamping cavity (42) is provided on the top of the middle mold part (41), a plurality of positioning holes (43) are provided on the middle mold part (41), the outer upper mold punch (31) and the two groups of limiting plates (35), and a plurality of positioning columns (21) are respectively inserted into the plurality of positioning holes (43).

9. A powder metallurgy parts stamping die as claimed in claim 8, characterized in that: The top of the middle mold (41) is provided with a plurality of groups of adsorption members (44), and the bottom of the outer upper mold punch (31) is provided with a plurality of groups of installation grooves (45) corresponding to the plurality of groups of adsorption members (44), and electromagnets (46) are arranged in the plurality of groups of installation grooves (45).

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