Multi-stage damping powder metallurgy valve seat gradient pressing die

Abstract

The utility model discloses a multistage damping powder metallurgy valve seat gradient pressing die, and relates to the technical field of powder metallurgy die manufacturing, the multistage damping powder metallurgy valve seat gradient pressing die comprises a supporting frame, the inner wall of the supporting frame is in sliding connection with a discharging device, the inner wall of the discharging device is in sliding connection with a replacing device, and the replacing device is connected with the discharging device. The replacement device carries out replacement in a sliding mode; through the arrangement of the replacement device, a sliding replacement mode is adopted, and the structural design of a limiting plate, a sliding plate, a plug pin assembly and the like is adopted, so that a complex dismounting tool is not needed in the replacement process, part replacement can be completed only through sliding and buckling operation, and the mold maintenance time and the part replacement time are remarkably shortened; the placing frame can slide in the I-shaped frame through the sliding rods, multi-angle limiting and fixing are achieved through the cross-shaped frame, the position of the placing frame can be flexibly adjusted to adapt to machining objects of different shapes and sizes, and the purpose of meeting the diversified gradient pressing requirements of the powder metallurgy valve seat is achieved.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy mold manufacturing technology, specifically a multi-stage damping powder metallurgy valve seat gradient pressing mold. Background Technology

[0002] In modern industry, powder metallurgy valve seats are widely used in key industries such as aerospace, petrochemicals, and automobile manufacturing due to their excellent wear resistance, corrosion resistance, and good comprehensive mechanical properties.

[0003] Traditional molds often feature fixed-space discharge mechanisms, making it difficult to flexibly adjust them according to the size of different valve seats and powder filling requirements. This results in uneven powder distribution, affecting the molding accuracy of the valve seat gradient structure. Some molds use bolted connections or complex nested structures, making replacement cumbersome, requiring specialized tools and time-consuming. Frequent replacement operations severely reduce production efficiency. The transmission and load-bearing structure design of traditional molds is also unreasonable, making them prone to shaking or loosening of parts during pressing. This leads to unstable pressure transmission, affecting not only the pressing quality of the valve seat but also potentially shortening the mold's lifespan and increasing maintenance costs. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a multi-stage damping powder metallurgy valve seat gradient pressing mold, which solves the problems of inaccurate material output, cumbersome replacement, unstable structure, and poor adaptability of traditional molds.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage damping powder metallurgy valve seat gradient pressing mold, comprising: a support frame, a discharge device slidably connected to the inner wall of the support frame, a replacement device slidably connected to the inner wall of the discharge device, the replacement device being replaced by sliding, a hydraulic cylinder fixedly connected to the inner wall of the support frame, the discharge device including a bidirectional screw, an I-beam slidably connected to the outer wall of the bidirectional screw via a dovetail rail, the inner wall of the I-beam slidably connected to the replacement device, and through the cooperation of the bidirectional screw and the I-beam slid in the discharge device, the two I-beam slid symmetrically along the dovetail rail when the bidirectional screw rotates, precisely adjusting the discharge spacing to adapt to the powder discharge requirements of pressing valve seats of different specifications.

[0008] Preferably, the outer wall of the bidirectional screw is rotatably connected to the inner wall of the support frame, and the top end of the dovetail rail is fixedly connected to the bottom end of the I-beam frame.

[0009] Preferably, the replacement device includes a limiting plate, and a sliding plate is slidably connected to the inner wall of the limiting plate via a dovetail groove. The dovetail groove is formed on the inner wall of the limiting plate. A pin assembly is slidably connected to the inner wall of the sliding plate, and a fastener is slidably connected to the inner wall of the pin assembly. The replacement device adopts a sliding replacement method. The structural design of the limiting plate, sliding plate, and pin assembly makes the replacement process unnecessary for complex disassembly tools. The component replacement can be completed simply by sliding and fastening operations, significantly shortening the mold maintenance and component replacement time.

[0010] Preferably, the top end of the limiting plate is fixedly connected to the bottom end of the hydraulic cylinder, the outer wall of the pin assembly is in contact with the outer wall of the limiting plate, and the limiting plate is fixedly connected to the hydraulic cylinder, providing a stable power transmission path for the pressing process.

[0011] Preferably, the outer wall of the fastener is slidably connected to a limiting frame, and the outer wall of the fastener is inclined. A compression spring is fixedly connected to the bottom end of the fastener, and a pressing rod is fixedly connected to the top end of the fastener. The bottom end of the limiting frame is fixedly connected to the top end of the limiting plate, and the bottom end of the compression spring is fixedly connected to the pin assembly. The outer wall of the pressing rod is slidably connected to the inner wall of the pin assembly. The cooperation between the pin assembly and the fastener forms a reliable limiting fixation after the components are installed.

[0012] Preferably, the replacement device further includes a placement frame, the bottom end of which is rotatably connected to a sliding rod, the bottom end of which is fixedly connected to a cross, and the top end of the placement frame contacts the bottom end of the sliding plate through the workpiece. The outer wall of the sliding rod box cross is slidably connected to the inner wall of the I-beam frame. The design of the placement frame, sliding rod, and cross in the replacement device allows the placement frame to slide within the I-beam frame via the sliding rod, and the cross is used to achieve multi-angle limiting and fixing. The position and angle of the placement frame can be flexibly adjusted to adapt to workpieces of different shapes and sizes, meeting diverse needs for gradient pressing of powder metallurgy valve seats.

[0013] Beneficial effects

[0014] This invention provides a multi-stage damping powder metallurgy valve seat gradient pressing mold. It has the following beneficial effects:

[0015] This utility model, through the setting of a replacement device, adopts a sliding replacement method. The structural design of the limiting plate, sliding plate and pin assembly, etc., makes the replacement process without complicated disassembly tools. The parts can be replaced by sliding and snapping operations, which significantly shortens the mold maintenance and parts replacement time. The design of the placement frame, sliding rod and cross allows the placement frame to slide in the I-beam frame through the sliding rod and use the cross to achieve multi-angle limiting and fixing. The position and angle of the placement frame can be flexibly adjusted to adapt to processing objects of different shapes and sizes, and meet the diverse needs of powder metallurgy valve seat gradient pressing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the hydraulic cylinder of this utility model;

[0018] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0019] Figure 4 This is a schematic diagram of the structure of the placement frame of this utility model;

[0020] Figure 5 This is a schematic diagram of the cross structure of this utility model.

[0021] In the diagram: 1. Support frame; 2. Discharge device; 20. Bidirectional screw; 21. I-beam frame; 3. Changing device; 30. Limiting plate; 31. Sliding plate; 32. Pin assembly; 33. Fastener; 34. Limiting frame; 35. Compression spring; 36. Pressing rod; 310. Placement frame; 311. Slide rod; 312. Cross; 4. Hydraulic cylinder. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example

[0024] Please see Figure 1-5 This utility model provides a technical solution: a multi-stage damping powder metallurgy valve seat gradient pressing mold, comprising:

[0025] Support frame 1, with a material discharge device 2 slidably connected to the inner wall of support frame 1, and a replacement device 3 slidably connected to the inner wall of material discharge device 2. Replacement device 3 is replaced by sliding. Hydraulic cylinder 4 is fixedly connected to the inner wall of support frame 1. The required size is set by replacement device 3, then pressed by hydraulic cylinder 4, and demolded by material discharge device 2.

[0026] The discharge device 2 includes a bidirectional screw 20. The outer wall of the bidirectional screw 20 is symmetrically slidably connected to an I-beam frame 21 via a dovetail rail. The inner wall of the I-beam frame 21 is slidably connected to the replacement device 3. The outer wall of the bidirectional screw 20 is rotatably connected to the inner wall of the support frame 1. The top end of the dovetail rail is fixedly connected to the bottom end of the I-beam frame 21. Before pressing the powder metallurgy valve seat, by rotating the bidirectional screw 20, the cooperation mechanism between it and the dovetail rail and the I-beam frame 21 is used to make the two sides of the I-beam frame 21 slide symmetrically along the dovetail rail, so that the placement frame 310 in the replacement device 3 can be closed together. Then the original material of the processing object is placed inside, and the power of the hydraulic cylinder 4 is turned on, so that the hydraulic cylinder 4 presses the processing object downwards to form it.

[0027] The replacement device 3 includes a limiting plate 30. The inner wall of the limiting plate 30 is slidably connected to a sliding plate 31 through a dovetail groove. The dovetail groove is opened on the inner wall of the limiting plate 30. The inner wall of the sliding plate 31 is slidably connected to a pin assembly 32. The inner wall of the pin assembly 32 is slidably connected to a fastener 33. The top end of the limiting plate 30 is fixedly connected to the bottom end of the hydraulic cylinder 4. The outer wall of the pin assembly 32 is in contact with the outer wall of the limiting plate 30. When it is necessary to replace the mold component, the operator presses the pressing rod 36 at the top of the fastener 33 to overcome the elastic force of the compression spring 35, so that the fastener 33 slides upward in the limiting frame 34, releasing the limitation on the pin assembly 32. At this time, the sliding plate 31 can slide out along the dovetail groove on the inner wall of the limiting plate 30, thus completing the replacement of the pressing module.

[0028] The outer wall of the fastener 33 is slidably connected to the limiting frame 34, and the outer wall of the fastener 33 is inclined. The bottom end of the fastener 33 is fixedly connected to the compression spring 35, and the top end of the fastener 33 is fixedly connected to the pressing rod 36. The bottom end of the limiting frame 34 is fixedly connected to the top end of the limiting plate 30. The bottom end of the compression spring 35 is fixedly connected to the pin assembly 32. The outer wall of the pressing rod 36 is slidably connected to the inner wall of the pin assembly 32.

[0029] The replacement device 3 also includes a placement frame 310. The bottom end of the placement frame 310 is rotatably connected to a slide rod 311, and the bottom end of the slide rod 311 is fixedly connected to a cross 312. The top end of the placement frame 310 contacts the bottom end of the sliding plate 31 through the workpiece. The outer walls of the slide rod 311 and the cross 312 are slidably connected to the inner wall of the I-beam frame 21. Then, the placement frame 310 is replaced by manually rotating the cross 312. During this process, the cross 312 rotates on the outer wall of the I-beam frame 21. When the cross groove in the I-beam frame 21 is aligned, the placement frame 310 can be pulled upwards, allowing the cross 312 and the slide rod 311 to slide on the inner wall of the I-beam frame 21. Conversely, when installing a placement frame 310 of a different size, the cross 312 at the bottom end of the placement frame 310 is aligned with the cross groove on the inner wall of the I-beam frame 21 and inserted. Then, the cross 312 is rotated to lock it.

[0030] In use, the required size is determined by changing device 3, then pressed by hydraulic cylinder 4, and demolded by discharge device 2;

[0031] Before pressing the powder metallurgy valve seat, by rotating the bidirectional screw 20, the two sides of the I-beam 21 slide symmetrically along the dovetail rail using its cooperation mechanism with the dovetail rail and the I-beam frame 21, so that the placement frame 310 in the replacement device 3 can be put together. Then the original material of the processing object is placed inside, and the power of the hydraulic cylinder 4 is turned on, so that the hydraulic cylinder 4 presses the processing object downward to form it.

[0032] When it is necessary to replace the mold component, the operator presses the pressing rod 36 at the top of the buckle 33 to overcome the elastic force of the compression spring 35, so that the buckle 33 slides upward in the limiting frame 34, releasing the limitation on the pin assembly 32. At this time, the sliding plate 31 can be slid out along the dovetail groove on the inner wall of the limiting plate 30, thus completing the replacement of the pressing module.

[0033] Then, the placement frame 310 is replaced by manually rotating the cross 312. During this process, the cross 312 rotates on the outer wall of the I-beam 21 until the cross groove in the I-beam 21 is aligned. Then, the placement frame 310 can be pulled upwards, allowing the cross 312 and the slide bar 311 to slide on the inner wall of the I-beam 21. Conversely, when Xuyang installs a placement frame 310 of a different size, the cross 312 at the bottom of the placement frame 310 is aligned with the cross groove on the inner wall of the I-beam 21 and inserted. Then, the cross 312 is rotated to lock it.

[0034] After the powder filling and mold component installation are completed, the hydraulic cylinder 4 is started. The pressure output by the cylinder is stably transmitted to the replacement device 3 through the fixed connection with the limit plate 30. During the pressing process, the bidirectional screw 20 is rotatably connected to the inner wall of the support frame 1, and the dovetail rail is fixedly connected to the I-beam frame 21, forming a stable discharge structure that can effectively withstand the pressing pressure and reduce shaking. At the same time, the cooperation between the pin assembly 32 and the fastener 33 ensures that the positions of each component of the replacement device 3 are accurately fixed, avoiding pressing deviations caused by loosening, thereby ensuring the quality and accuracy of the valve seat gradient pressing.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage damping powder metallurgy valve seat gradient pressing mold, comprising: Support frame (1), characterized in that: The inner wall of the support frame (1) is slidably connected to a discharge device (2), the inner wall of the discharge device (2) is slidably connected to a replacement device (3), the replacement device (3) is replaced by sliding, and the inner wall of the support frame (1) is fixedly connected to a hydraulic cylinder (4). The discharge device (2) includes a bidirectional screw (20), the outer wall of which is symmetrically slidably connected to an I-beam frame (21) via a dovetail rail, and the inner wall of the I-beam frame (21) is slidably connected to the replacement device (3).

2. The multi-stage damping powder metallurgy valve seat gradient pressing mold according to claim 1, characterized in that: The outer wall of the bidirectional screw (20) is rotatably connected to the inner wall of the support frame (1), and the top end of the dovetail rail is fixedly connected to the bottom end of the I-beam frame (21).

3. The multi-stage damping powder metallurgy valve seat gradient pressing mold according to claim 1, characterized in that: The replacement device (3) includes a limiting plate (30), the inner wall of the limiting plate (30) is slidably connected to a sliding plate (31) through a dovetail groove, and the dovetail groove is opened on the inner wall of the limiting plate (30). The inner wall of the sliding plate (31) is slidably connected to a pin assembly (32), and the inner wall of the pin assembly (32) is slidably connected to a fastener (33).

4. The multi-stage damping powder metallurgy valve seat gradient pressing mold according to claim 3, characterized in that: The top end of the limiting plate (30) is fixedly connected to the bottom end of the hydraulic cylinder (4), and the outer wall of the pin assembly (32) is in contact with the outer wall of the limiting plate (30).

5. The multi-stage damping powder metallurgy valve seat gradient pressing mold according to claim 3, characterized in that: The outer wall of the fastener (33) is slidably connected to the limiting frame (34), and the outer wall of the fastener (33) is inclined. The bottom end of the fastener (33) is fixedly connected to the compression spring (35), and the top end of the fastener (33) is fixedly connected to the pressing rod (36). The bottom end of the limiting frame (34) is fixedly connected to the top end of the limiting plate (30), the bottom end of the compression spring (35) is fixedly connected to the pin assembly (32), and the outer wall of the pressing rod (36) is slidably connected to the inner wall of the pin assembly (32).

6. The multi-stage damping powder metallurgy valve seat gradient pressing mold according to claim 3, characterized in that: The replacement device (3) also includes a placement frame (310), the bottom end of which is rotatably connected to a slide rod (311), the bottom end of which is fixedly connected to a cross (312), the top end of which is in contact with the bottom end of the sliding plate (31) through the workpiece, and the outer wall of the slide rod (311) and the cross (312) is slidably connected to the inner wall of the I-beam frame (21).

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