Floating plate filling action mechanism
Through the symmetrically arranged double-head cylinder structure and the design of adjustment nuts, the jitter and air leakage problems in the filling adjustment of floating plate of the powder metallurgy forming machine are solved, stable filling and cylinder life extension are achieved, and structural design is optimized.
Patent Information
- Application Number
- CN202422359430.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The floating plate filling and adjustment mechanism of the existing powder metallurgy forming machine has problems such as cylinder components shaking, bending and deformation, air leakage and air leakage in the intake pipe, which affects the filling stability and cylinder life.
The double-head cylinder structure is adopted with a symmetrically arranged, and the fixed cylinder block is connected to the fixed plate, and the upper and lower piston rods are connected to the floating plate and the adjustment nut respectively. The piston rod stroke is adjusted by adjusting the piston rod stroke, and the stable filling of the floating plate is achieved.
It improves the stability of floating plate filling, extends the service life of the cylinder, reduces air leakage failures, simplifies the structure and saves movement space.
Smart Images
Figure CN223129354U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a floating plate filling action mechanism, belonging to the technical field of powder metallurgy forming machines. Background Art
[0002] A powder metallurgy forming machine mainly includes an upper punch die, a middle die cavity, and a lower punch die. Pressure is applied to the powder in the middle die cavity through the upper punch die and the lower punch die to compress and form it. During the powder forming process, filling, powder transfer, and forming are several important steps. The floating plate needs to drive the lower floating punch of the die to adjust to different positions according to different steps. Therefore, the filling adjustment of the floating plate is directly related to the quality and performance of the formed product.
[0003] In the prior art, the realization of the floating plate filling adjustment of a powder metallurgy forming machine is as follows: the cylinder block of the filling cylinder is fixedly connected to the floating plate, the piston rod of the filling cylinder is connected to the fixed plate, and the extension height of the piston rod is adjusted to fix the piston rod, and the cylinder block of the cylinder moves up and down with the floating plate. This structure has the following deficiencies:
[0004] 1) The relatively light and thin piston rod is used as a fixed limit support, and the relatively heavy and large cylinder block is used as a moving part. During the movement of the floating plate filling and returning, it is easy to cause the shaking and bending deformation of the cylinder components, resulting in air leakage of the cylinder or even fracture of the piston rod, greatly affecting the service life of the filling cylinder;
[0005] 2) The air inlet pipe and related joints of the filling cylinder are connected to the cylinder block. During the movement of the cylinder block, the air inlet pipe and related joints also move, which requires a larger movement space; at the same time, the movement of the cylinder block is also likely to cause air leakage of the air inlet pipe and related joints.
[0006] Therefore, a stable and simple floating plate filling adjustment mechanism is needed to make the floating plate filling stable, extend the service life of the cylinder, and reduce the air leakage failure rate. Summary of the Utility Model
[0007] The purpose of the utility model is to provide a floating plate filling action mechanism aiming at the deficiencies of the above-mentioned prior art. While ensuring the reliable filling adjustment function of the floating plate of the powder metallurgy forming machine die set, the structure can be optimized to improve the filling stability, extend the service life of the cylinder, and reduce the air leakage risk.
[0008] The purpose of the utility model is achieved as follows:
[0009] A floating plate filling action mechanism is characterized by including a pair of symmetrically arranged double-headed cylinders, fixed seats with the same number as the double-headed cylinders, and adjusting nuts with the same number as the double-headed cylinders.
[0010] The filling cylinder is a double-headed cylinder with a double-shaft structure with upper and lower extended ends. There is only one piston in the cylinder body. One end of the upper and lower piston rods is respectively connected to both end faces of the piston, and the other ends of the upper and lower piston rods respectively pass through the upper and lower cylinder covers, and the upper and lower cylinder covers are respectively provided with air inlet and outlet ports for an external air source. The upper piston rod is connected to a floating plate, and the lower piston rod is provided with an external thread.
[0011] The fixed seat is fixedly installed on the fixed plate, used to support the cylinder body of the double-headed cylinder, and has a cavity that penetrates up and down; the cylinder body (lower cylinder cover) of the double-headed cylinder is placed on the top of the fixed seat, and the lower piston rod passes downward through the cavity of the fixed seat. The fixed plate is provided with through holes for the adjusting nut and the lower piston rod to pass through at positions corresponding to the cavity of the fixed seat.
[0012] The adjusting nut is sleeved on the lower piston rod from the bottom of the fixed plate and is threadedly connected to the lower piston rod. There are gaps between the outer side wall of the adjusting nut and the cavity of the fixed seat and the through hole of the fixed plate, so as not to interfere with the rotation of the adjusting nut.
[0013] In the above solution, by rotating the adjusting nut, the distance between the upper end face of the adjusting nut and the end face of the lower cylinder cover of the double-headed cylinder is adjusted. This distance is the stroke of the lower piston rod and also the stroke of the upper piston rod moving upward, so that the floating plate drives the lower floating punch to complete the filling action.
[0014] Further, the lower piston rod is in a stepped shape, including a smooth rod section with a larger outer diameter in the upper part and an external thread section with a smaller outer diameter in the lower part; the central hole of the adjusting nut is also in a stepped shape, and its hole wall includes a smooth hole section and a threaded hole section. The smooth hole section of the adjusting nut is in clearance fit with the smooth rod section of the lower piston rod, which can support and guide the lower piston rod; the threaded hole section of the adjusting nut is connected to the external thread section of the lower piston rod, so as to adjust the stroke of the lower piston rod. The design of the stepped structure can limit the adjusting nut to prevent the adjusting nut from being over-adjusted upward and applying an external force to the cylinder body.
[0015] Further, the sum of the axial lengths of the cavity of the fixed seat and the through hole of the fixed plate is less than the axial length of the adjusting nut, which can ensure that the lower end of the adjusting nut is always exposed, facilitating the adjustment operation.
[0016] The utility model fixes the symmetrically arranged cylinder bodies of the double-headed cylinder on the fixed seat, the fixed seat is installed on the fixed plate, the upper piston rod is directly fixedly connected to the floating plate (the lower floating punch is installed on the floating plate), when the upper piston rod extends, it realizes the upward filling of the floating plate, the lower piston rod is threadedly connected to the adjusting nut, and when the adjusting nut rotates, it can move up and down along the lower piston rod. By adjusting the distance from the upper end face of the adjusting nut to the lower cylinder cover of the double-headed cylinder, the upward movement stroke of the double-headed cylinder is controlled, so as to realize the adjustment of the floating plate filling. The filling amount of the floating plate is generally 0 - 100 mm.
[0017] The utility model has the following beneficial effects:
[0018] 1) Each floating plate is connected by two double-headed cylinders to achieve upward filling movement, and the floating plate filling is stable; the stroke adjustment of the two double-headed cylinders is realized through the threaded transmission of the adjusting nut and the lower piston rod, with a simple and reasonable structure and small occupied space;
[0019] 2) The cylinder body of the filling cylinder is fixed, and only the piston rod moves up and down. The main body is fixed and the small parts move, improving the stability and extending the service life of the cylinder;
[0020] 3) The air pipe joints on the cylinder are also fixed due to the fixation of the cylinder body, without the need for movement space and no deformation and air leakage of the air pipe joints caused by movement jitter. Description of the Drawings
[0021] Figure 1 is a schematic structural diagram of the utility model;
[0022] Figure 2 is a schematic structural diagram of the double-headed cylinder in the utility model;
[0023] Figure 3 is a schematic structural diagram of the adjusting nut in the utility model;
[0024] In the figure: filling cylinder 1, piston 1-1, upper piston rod 1-2, lower piston rod 1-3, smooth rod section 1-3-1, external thread section 1-3-2, upper cylinder head 1-4, lower cylinder head 1-5, upper air inlet and outlet 1-6, lower air inlet and outlet 1-7; fixed seat 2, cavity 2-1, adjusting nut 3, smooth hole section 3-1, threaded hole section 3-2, fixing plate 4, floating plate 5. Detailed Implementation Modes
[0025] A floating plate filling action mechanism, as Figure 1 shown, includes a pair of filling cylinders 1, a pair of fixed seats 2, a pair of adjusting nuts 3, a fixing plate 4, and a floating plate 5.
[0026] Among them, the filling cylinder adopts a double-headed cylinder, as Figure 2 shown. The cylinder body is provided with a piston 1-1, an upper piston rod 1-2, a lower piston rod 1-3, an upper cylinder head 1-4, a lower cylinder head 1-5, an upper air inlet and outlet 1-6, and a lower air inlet and outlet 1-7. One end of the upper and lower piston rods is respectively connected to the two end faces of the piston, and the other ends of the upper and lower piston rods respectively pass through the upper and lower cylinder heads, and the upper and lower air inlet and outlets are respectively arranged at the upper and lower cylinder heads.
[0027] In an embodiment of the utility model, as Figure 1 、 Figure 2As shown, a threaded hole is provided on the top end face of the upper piston rod, and the floating plate 5 can be directly connected through a bolt. The floating plate is connected to install the lower floating punch.
[0028] As Figure 1 shown, the fixed seat 2 is fixed on the fixed plate 4 and has a cavity 2-1 penetrating up and down; the lower cylinder head of the double-headed cylinder is placed on the top of the fixed seat, and the lower piston rod passes downward through the cavity of the fixed seat. The fixed plate is provided with through holes for the adjusting nut and the lower piston rod to pass through at positions corresponding to the cavity of the fixed seat. The adjusting nut is sleeved on the lower piston rod from the bottom of the fixed plate and is threadedly connected to the lower piston rod. There are gaps between the outer side wall of the adjusting nut and the cavity of the fixed seat and the through hole of the fixed plate, so as not to interfere with the rotation of the adjusting nut.
[0029] In an embodiment of the present invention, as Figure 2 shown, the lower piston rod 1-3 includes a smooth rod section 1-3-1 with a larger outer diameter in the upper part and an external thread section 1-3-2 with a smaller outer diameter in the lower part. As Figure 3 shown, the hole wall of the central hole of the adjusting nut 3 includes a smooth hole section 3-1 and a threaded hole section 3-2. The smooth hole section is in clearance fit with the smooth rod section of the lower piston rod, and the threaded hole section is connected to the external thread section of the lower piston rod.
[0030] In an embodiment of the present invention, as Figure 1 shown, the sum of the axial lengths of the cavity of the fixed seat and the through hole of the fixed plate is less than the axial length of the adjusting nut, which is convenient for adjustment operation.
[0031] The filling amount of the floating plate is 0-100 mm. As Figure 1 shown in the left double-headed cylinder in the figure, the upper end face of the adjusting nut is in close contact with the lower cylinder head of the cylinder block, and the upper and lower piston rods cannot move upward. At this time, the filling amount of the floating plate is 0; by operating below the fixed plate and rotating the adjusting nut by hand to make it move downward along the axis of the lower piston rod, as Figure 1 shown in the right double-headed cylinder in the figure, the distance between the upper end face of the adjusting nut and the lower cylinder head of the cylinder block is 50 mm, the stroke of the lower piston rod is 50 mm, and the upper piston rod can extend upward by 50 mm. At this time, the filling amount of the floating plate is 50 mm.
Claims
1. A floating plate filling action mechanism, characterized in that, Comprising: A double-headed cylinder, including an upper piston rod and a lower piston rod; the upper piston rod is connected to a floating plate, and the lower piston rod is provided with an external thread; A fixed seat, fixedly installed on a fixing plate and having a cavity penetrating up and down; the cylinder body of the double-headed cylinder is located at the top of the fixed seat, and the lower piston rod passes downward through the cavity of the fixed seat; An adjusting nut, sleeved on the lower piston rod and threadedly connected to the lower piston rod; the stroke of the lower piston rod is adjusted by rotating the adjusting nut so that the floating plate can complete the filling action.
2. The floating plate filling action mechanism according to claim 1, characterized in that, The lower piston rod is stepped, including a smooth rod section with a larger outer diameter in the upper part and an external thread section with a smaller outer diameter in the lower part; The central hole of the adjusting nut is also stepped, and its hole wall includes a smooth hole section and a threaded hole section; the smooth hole section is in clearance fit with the smooth rod section of the lower piston rod, and the threaded hole section is connected to the external thread section of the lower piston rod.
3. The floating plate filling action mechanism according to claim 1, characterized in that, The fixing plate is provided with a through hole for the adjusting nut and the lower piston rod to pass through at a position corresponding to the cavity of the fixed seat.
4. A floating plate filling action mechanism according to claim 3, characterized in that, The sum of the axial lengths of the cavity of the fixed seat and the through hole of the fixing plate is less than the axial length of the adjusting nut.
5. A floating plate filling action mechanism according to claim 1, characterized in that, A piston is provided in the cylinder body of the double-headed cylinder. One end of the upper and lower piston rods is respectively connected to the piston, and the other end respectively extends out of the upper and lower cylinder covers. The upper and lower cylinder covers are respectively provided with air inlet and outlet ports for an external air source.
6. The floating plate filling action mechanism according to claim 5, characterized in that, The double-headed cylinders are arranged in pairs and symmetrically.