Powder metallurgy pressure sintering die
By using a V-shaped base plate and a high-temperature resistant graphite pressure plate in the powder metallurgy pressure sintering mold, the technical problem that existing equipment cannot tilt materials with an inclined surface is solved, enabling the application of non-parallel materials, realizing non-parallel surface sintering, reducing production costs and improving product precision.
Patent Information
- Application Number
- CN202520058747.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-10
AI Technical Summary
Existing pressure sintering equipment cannot directly apply pressure to materials with an inclination, resulting in increased production costs and material waste. Furthermore, conventional production methods require outsourcing for machining in the later stages, which affects the production cycle and efficiency.
A powder metallurgical pressure sintering mold with a V-shaped base plate was adopted. By setting symmetrical inclined surfaces and high-temperature resistant graphite pressure plates on the base plate, the non-parallel surfaces of the material are tilted and pressurized. The lateral force is offset by the extrusion method inside the mold. Combined with the stable support of the heat-resistant steel base plate, the non-parallel surfaces are sintered.
It enables direct forming of powder metallurgy products with non-parallel surfaces, reducing production costs and improving product dimensional accuracy, reducing post-processing costs and material waste, and extending the service life of molds.
Smart Images
Figure CN223718309U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to powder metallurgy technical field, especially relate to a powder metallurgy pressure sintering mould. BACKGROUND
[0002] In powder metallurgy materials, many functional materials (such as powder metallurgy friction material) need to be pressure sintered to meet the requirements of product physical properties. Some of the products need a certain slope due to design requirements, and since the existing pressure sintering equipment, such as bell jar furnace, can basically only be pressed up and down, the pressure surface of the material must be required to be parallel, which brings great difficulty to the production of the above products. Under the conventional production mode, the products with slope cannot be directly sintered into finished products, and the product shape needs to be machined by external cooperation in the later period, which increases the production cycle and cost, and if the product slope is too large, the material waste phenomenon is also a serious problem. SUMMARY
[0003] In view of the defects or deficiencies in the prior art, the utility model provides a powder metallurgy pressure sintering mould, which can directly incline and press the non-parallel surface of the material, and realize the non-parallel surface sintering of the powder metallurgy pressure sintering product.
[0004] To achieve the above object, the utility model adopts the following technical scheme:
[0005] The embodiment of the utility model provides a kind of powder metallurgy pressure sintering mould, including bottom plate, the bottom plate upper surface is V-shaped structure, the bottom plate upper surface is provided with pressing plate, pressing plate top is provided with gland, and friction material is placed between pressing plate and gland.
[0006] Further, the slope of the side wall on the upper surface of the bottom plate is the same as the slope of the product bottom surface.
[0007] Further, the bottom plate is provided with two, and the two pressing plates are symmetrically placed on the side walls on the upper surface of the bottom plate.
[0008] Further, the opposite side walls of the two pressing plates are in contact.
[0009] Further, the top surface and the bottom surface of the two pressing plates are both inclined surfaces, and are parallelly arranged.
[0010] Further, the slope of the top surface and the bottom surface of the pressing plate is the same as the slope of the product bottom surface.
[0011] Further, the gland is provided with two, and the two glands are respectively arranged corresponding to the two pressing plates, and the bottom surface of the gland is a plane.
[0012] Further, the bottom surface of the gland is in contact with the top of the friction material, and the top surface of the pressing plate is in contact with the bottom of the friction material.
[0013] Further, the pressing plate is made of high-temperature resistant graphite material.
[0014] Further, the bottom plate is made of heat-resistant steel material.
[0015] Compared with the prior art, the utility model has the advantages of:
[0016] 1、 the utility model discloses the upper surface of bottom plate is provided with V-shaped structure, through the slope of the both sides symmetry of bottom plate upper surface, when pressurized sintering, two products are close to each other, thereby through the internal extrusion mode of the internal compensation of the transverse component of the inclined force, thereby realize powder metallurgy pressurized sintering product non-parallel surface sintering.
[0017] 2、 the utility model discloses the slope of the both sides of bottom plate upper surface is same with product slope, thereby can offset the horizontal load brought in the sintering process in the sintering process.
[0018] 3、 the pressing plate in the utility model adopts high-temperature resistant graphite material, has high thermal conductivity, places it at the bottom of friction material, can make friction material heat more evenly, guarantees the forming quality of product, and the thermal expansion coefficient of graphite material is small, and the overall deformation is small when high-temperature sintering, thereby improve the dimensional accuracy of product.
[0019] 4、 the utility model discloses the pressing plate is set up into two symmetries, and is set up with two friction materials respectively, can guarantee that brittle graphite plate will not break due to sintering stress, improve the life of mould, reduce manufacturing cost and service life. DRAWINGS
[0020] Figure 1 It is the structure schematic diagram of pressurized sintering mould in the embodiment of the utility model.
[0021] Among them, 1, bottom plate, 2, pressing plate, 3, gland, 4, friction material. CONCRETE IMPLEMENTATION
[0022] The utility model is further explained below in combination with the drawings and embodiments.
[0023] A typical embodiment of the utility model, for example, Figure 1As shown, a powder metallurgy press sintering mold comprises a base plate 1, the upper surface of the base plate 1 is in a V-shaped structure, the slope of the side wall on the upper surface of the base plate 1 is the same as the slope of the product bottom surface, the side wall on the upper surface of the base plate 1 is provided with a pressing plate 2, the two pressing plates 2 are symmetrically arranged, and the opposite side walls of the two pressing plates 2 are in contact, the top surface and the bottom surface of the two pressing plates 2 are parallel to each other, and both are inclined surfaces, the slope of the top surface and the bottom surface of the pressing plate 2 is the same as the slope of the product bottom surface, and the upper portion of each pressing plate 2 is provided with a pressing cap 3, the bottom surface of the pressing cap 3 is a plane, the pressing cap 3 and the pressing plate 2 form a forming space, and the forming space is provided with a friction material 4 for forming a product, the bottom of the friction material 4 is in contact with the top surface of the pressing plate 2, and the top of the friction material 4 is in contact with the bottom surface of the pressing cap 3, and the friction material 4 is press sintered by pressurizing the pressing cap 3 and heating during the pressurizing process.
[0024] The base plate 1 is made of heat-resistant steel material and can stably support during heating.
[0025] The pressing plate 2 is made of high-temperature-resistant graphite material and has high thermal conductivity, and the graphite material is placed at the bottom of the friction material 4, so that the friction material 4 can be heated more uniformly, the forming quality of the product is ensured, and the thermal expansion coefficient of the graphite material is small, so that the overall deformation is small during high-temperature sintering, thereby improving the size precision of the product.
[0026] In addition, the pressing plate 2 is arranged in a symmetrical manner and corresponds to the two friction materials 4, so that the brittle graphite plate will not be broken due to sintering stress, the service life of the mold is improved, the manufacturing cost and service life are reduced.
[0027] In use, the two pressing caps 3 and the pressing plate 2 are respectively provided with the friction material 4, the mold is placed on a press sintering equipment, and the pressing plate 2 can uniformly transmit the inclined force transmitted by the product to be sintered to the base plate 1 during the press sintering process, so that the horizontal load during sintering can be offset due to the same slope of the upper surface of the base plate 1 and the product.
[0028] In addition, the pressing plate 2 is arranged in a symmetrical manner and corresponds to the two friction materials 4, so that the brittle graphite plate will not be broken due to sintering stress, the service life of the mold is improved, the manufacturing cost and service life are reduced.
[0029] The utility model can directly pressurize the non-parallel surface of the material, decompose the lateral stress generated by the non-parallel surface through the component with high shear resistance in the mold, ensure the angle and flatness of the product through the component with good heat resistance and small thermal expansion coefficient in the mold, and effectively realize the press sintering of the non-parallel surface of the powder metallurgy press sintering product, so that the cost increase caused by a large amount of post-processing is avoided.
[0030] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A powder metallurgy press sintering die, characterized by, The application relates to a friction material forming device, which comprises a bottom plate, the upper surface of the bottom plate is in a V-shaped structure, the upper surface of the bottom plate is provided with a pressing plate, a pressing cap is arranged above the pressing plate, and the pressing cap and the pressing plate are used for placing friction material for forming products.
2. A powder metallurgy press sintering die as recited in claim 1 wherein, The slope of the side walls on the two sides of the upper surface of the bottom plate is the same as the slope of the bottom surface of the product.
3. A powder metallurgy press sintering die as recited in claim 1 wherein, The pressing plate is provided with two pressing plates which are symmetrically arranged on the side walls on the two sides of the upper surface of the bottom plate.
4. A powder metallurgy press sintering die as claimed in claim 3, wherein The opposite side walls of the two pressing plates are in contact.
5. A powder metallurgy press sintering die as claimed in claim 3 wherein, The top surface and the bottom surface of the two pressing plates are both inclined surfaces and are arranged in parallel.
6. A powder metallurgy press sintering die as claimed in claim 5, wherein The slope of the top surface and the bottom surface of the pressing plate is the same as the slope of the bottom surface of the product.
7. A powder metallurgy press sintering die as claimed in claim 3 wherein, The pressing cap is provided with two pressing caps which are correspondingly arranged with the two pressing plates, and the bottom surface of the pressing cap is a plane.
8. A powder metallurgy press sintering die as claimed in claim 7, wherein The bottom surface of the pressing cap is in contact with the top of the friction material, and the top surface of the pressing plate is in contact with the bottom of the friction material.
9. A powder metallurgy press sintering die as claimed in claim 1 wherein, The pressing plate is made of high-temperature-resistant graphite material.
10. A powder metallurgy press sintering die as claimed in claim 1 wherein, The bottom plate is made of heat-resistant steel.