Metal powder sintering filter element production equipment

Abstract

The utility model discloses metal powder sintered filter element production equipment, and relates to the technical field of filter material preparation. The device comprises a working table, a hydraulic cylinder, a scale bar, a middle rod, dies and electromagnetic coils, a containing cavity is formed in the working table, the middle rod is fixed in the containing cavity in a screwed connection mode, the two arc-shaped dies which are symmetrically distributed are wrapped outside the middle rod, and the electromagnetic coils are fixed in the containing cavity outside the two dies; a hydraulic cylinder is fixed to the upper portion of the horizontal portion of the L-shaped frame, a hydraulic rod at the telescopic end of the hydraulic cylinder downwards penetrates through the L-shaped frame and is fixedly provided with a connecting strip, two pressing rods are fixed to the bottom of the connecting strip, and a pressing ring is fixed to the bottoms of the two pressing rods jointly. By arranging the hydraulic cylinder, the pressing ring, the mold, the middle rod, the workbench, the scale strip, the pressing switch and the electromagnetic coil, the problems that production forming equipment for the cylindrical sintered filter element is lacked, the forming length of the filter element cannot be accurately controlled, and the filter element possibly contains an adhesive and is inconvenient to demold are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of filter material preparation, and particularly relates to a production device for sintered metal powder filters. Background Art

[0002] The sintered metal powder filter is a new type of metal porous filter element with high strength and overall high performance, which is prepared through main processes such as cold isostatic pressing, high-temperature vacuum sintering, and welding of metal powder. In terms of its forming process, it includes die pressing: the powder is loaded into a mold and pressed into a green body by a mechanical press (the pressure is usually 50 - 500 MPa), and the shape can be tubular, sheet-like, etc.; isostatic pressing: cold isostatic pressing (CIP) is used for complex shapes, and isotropic pressure is applied through a liquid medium to improve the density uniformity of the green body; injection molding (MIM): ultrafine powder is mixed with a plastic binder and then injection molded, which is suitable for complex micro filters, but subsequent degreasing treatment is required. However, there are still the following drawbacks in actual production operations:

[0003] 1. First, as in the invention patent with the application number 202311154404.1, it is for the production of sheet filters, which cannot meet the pressing production operation of hollow cylindrical filters. Lateral pressing cannot meet the production of cylindrical filters, so it needs to be improved;

[0004] 2. Second, as in the above patent, it controls the production of filters with different lengths, but it is also not applicable to cylindrical filters. It cannot accurately control the pressing degree, and cannot accurately control the length, height, etc. of the filter forming;

[0005] 3. Finally, some binders, etc. are added during the forming of sintered filters, which may cause sticking during demolding and are not easy to demold, so auxiliary demolding treatment is required. Content of the Utility Model

[0006] The purpose of the utility model is to provide a production device for sintered metal powder filters, which solves the problems of the lack of production and forming equipment for cylindrical sintered filters, the inability to accurately control the forming length of the filter, and the inconvenience of demolding due to the possible presence of adhesives in the filter by setting a hydraulic cylinder, a pressing ring, a mold, a middle rod, a workbench, a scale bar, a pressing switch, and an electromagnetic coil.

[0007] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0008] The utility model relates to a production device for a sintered metal powder filter element, which comprises a workbench, a hydraulic cylinder, a scale bar, a middle rod, a die and an electromagnetic coil. An accommodation cavity is arranged inside the workbench, a middle rod is rotatably fixed inside the accommodation cavity, two arc-shaped and symmetrically distributed dies are wrapped outside the middle rod, and an electromagnetic coil is fixed inside the accommodation cavity outside the two dies;

[0009] An L-shaped frame is fixed at the rear side of the workbench, and the horizontal part of the L-shaped frame is located above the workbench. A reinforcing rib is welded between the two inner right-angle surfaces of the L-shaped frame; a hydraulic cylinder is fixed above the horizontal part of the L-shaped frame. The hydraulic rod at the telescopic end of the hydraulic cylinder penetrates downward through the horizontal part of the L-shaped frame and is fixed with a connecting bar, and two pressing rods are fixed at the bottom of the connecting bar. A pressing ring is fixed jointly at the bottom of the two pressing rods.

[0010] Furthermore, a threaded groove is formed in the inner bottom of the accommodation cavity, a threaded section is arranged on the outer periphery of the lower part of the middle rod, and the threaded section of the middle rod is screwed into the threaded groove.

[0011] Furthermore, clamping grooves are symmetrically formed in the outer periphery of the middle rod above the threaded section, clamping blocks are fixed on the inner arc surface of the lower port of the die, and the clamping blocks are inserted into the corresponding clamping grooves.

[0012] Furthermore, strip plates are fixed on both side edges of the two dies, adjacent strip plates are closely attached to each other and penetrated and inserted with locking bolts, and nuts are screwed at the tail ends of the locking bolts.

[0013] Furthermore, a feeding pipe is fixedly penetrated through the upper part of the die, the top end of the feeding pipe obliquely extends upward out of the accommodation cavity, the upper end of the middle rod exceeds the height of the accommodation cavity, and the upper end of the middle rod is of a round head structure.

[0014] Furthermore, the inner diameter of the pressing ring is equal to the diameter of the middle rod, and the outer diameter of the pressing ring is equal to the diameter formed after the combination of the two dies.

[0015] Furthermore, a scale bar is also fixed at the upper end of the workbench. A kit is sleeved outside the scale bar. A base block is fixed on the surface of the kit close to the center of the workbench, and a pressing switch is fixed on the base block. A limit bolt is rotatably penetrated through the surface of the kit far from the center of the workbench, and the tail end of the limit bolt contacts the surface of the scale bar.

[0016] The utility model has the following beneficial effects:

[0017] 1. The utility model solves the problem of lacking production and forming equipment for cylindrical sintered filter elements by setting a hydraulic cylinder, a pressing ring, a mold, a middle rod and a workbench. For the press-fitting and forming of cylindrical sintered filter elements, first, the two molds are assembled and spliced with each other and kept connected to the middle rod. Subsequently, the middle rod is screwed into the workbench. Then, an appropriate amount of metal powder is placed in the mold. Next, the hydraulic cylinder works to drive the connecting bar, the pressing rod and the pressing ring to descend, so that the pressing ring enters the mold to compact the metal powder in the mold into a shape.

[0018] 2. The utility model solves the problem that the forming length of the filter element cannot be accurately controlled by setting a scale bar and a pressing switch. For the control of the filter element length, one is the height of the pressing depth, and the other is the amount of the filled metal powder. Usually, the filling amount and the specific pressing height are matched according to certain requirements. Therefore, for the accurate control of the filter element length, corresponding filling amount and corresponding pressing height are required. So, first, a sufficient amount of metal powder is assembled in the mold, then the corresponding pressing height is set, the height position of the adjusting kit on the scale bar is adjusted, and then it is tightened. When the connecting bar moves down to contact the pressing switch, the hydraulic cylinder stops, and the pressing ring is also pressed to the specified height position in the mold, realizing accurate control.

[0019] 3. The utility model solves the problem that the filter element may contain an adhesive and is not easy to demold by setting a workbench and an electromagnetic coil. After the press-fitting and forming is completed, the electromagnetic coil is powered on to work, heating and raising the temperature of the mold, so that the metal powder at the inner wall of the mold is quickly dried, facilitating subsequent rapid demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below.

[0021] Figure 1 It is a three-dimensional view of a metal powder sintered filter element production equipment in a press-fitting state;

[0022] Figure 2 It is a three-dimensional view of a metal powder sintered filter element production equipment;

[0023] Figure 3 It is a connection diagram of the workbench and the mold after the workbench is sectioned;

[0024] Figure 4 It is a sectional view of the workbench;

[0025] Figure 5 It is a disassembled view of the mold and the middle rod;

[0026] Figure 6 It is for Figure 5 the enlarged view of the structure at A in

[0027] Figure 7 It is a connection diagram of a push switch and a kit.

[0028] Reference numerals:

[0029] 1. Workbench; 101. L-shaped frame; 1011. Reinforcing rib; 102. Accommodating cavity; 103. Threaded groove; 2. Hydraulic cylinder; 201. Connecting bar; 202. Pressing rod; 203. Pressing ring; 3. Scale bar; 301. Kit; 302. Base block; 303. Push switch; 304. Limit bolt; 4. Middle rod; 401. Threaded section; 402. Card slot; 5. Mold; 501. Feeding pipe; 502. Strip board; 503. Locking bolt; 504. Nut; 505. Block; 6. Electromagnetic coil. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] Please refer to Figure 1-7 As shown, the present invention is a production device for metal powder sintered filter elements, including a workbench 1, a hydraulic cylinder 2, a scale bar 3, a middle rod 4, a mold 5 and an electromagnetic coil 6. An accommodating cavity 102 is arranged inside the workbench 1, and a middle rod 4 is rotatably fixed inside the accommodating cavity 102. Two arc-shaped and symmetrically distributed molds 5 are wrapped outside the middle rod 4, and an electromagnetic coil 6 is fixed inside the accommodating cavity 102 outside the two molds 5;

[0032] First, connect the two molds 5 to the middle rod 4. The position where the middle rod 4 is located is the hollow cavity of the filter element. The metal powder outside the middle rod 4 and inside the mold 5 is press-fitted to form a filter element. After the press-fitting is completed, the electromagnetic coil 6 is powered on to work, heating and raising the temperature of the mold 5, so that the metal powder and adhesive on the inner wall of the mold 5 are quickly dried, facilitating subsequent rapid demolding;

[0033] An L-shaped frame 101 is fixed at the rear side of the workbench 1, and the horizontal part of the L-shaped frame 101 is located above the workbench 1. A reinforcing rib 1011 is welded between the two inner right-angle surfaces of the L-shaped frame 101; a hydraulic cylinder 2 is fixed above the horizontal part of the L-shaped frame 101. The hydraulic rod at the telescopic end of the hydraulic cylinder 2 penetrates downward through the horizontal part of the L-shaped frame 101 and is fixed with a connecting bar 201, and two pressing rods 202 are fixed at the bottom of the connecting bar 201, and a pressing ring 203 is jointly fixed at the bottom of the two pressing rods 202;

[0034] The L-shaped frame 101 serves as the main bearing part for installing the hydraulic cylinder 2, and a reinforcing rib 1011 is arranged inside it to enhance the structural strength. When the hydraulic cylinder 2 works, it drives the connecting bar 201, the pressing rod 202, the pressing ring 203, etc. to descend. The pressing ring 203 enters the mold 5 and is sleeved outside the middle rod 4 to press and form the metal powder between the outer wall of the middle rod 4 and the inner wall of the mold 5.

[0035] A threaded groove 103 is formed in the inner bottom of the accommodation cavity 102, and a threaded section 401 is arranged on the outer periphery of the lower part of the middle rod 4. The threaded section 401 of the middle rod 4 is screwed into the threaded groove 103. When assembling the middle rod 4, first keep it relatively fixed with the mold 5, and then screw the threaded section 401 at the lower part of the middle rod 4 into the threaded groove 103, keeping it relatively fixed with the workbench 1, and also keeping it coincident with the central axes of the accommodation cavity 102 and the middle rod 4, which is convenient for the precise alignment of subsequent press-fitting.

[0036] On the outer periphery of the middle rod 4 above the threaded section 401, clamping grooves 402 are symmetrically formed. On the inner arc surface of the lower port of the mold 5, a clamping block 505 is fixed, and the clamping block 505 is inserted into the corresponding clamping groove 402. When the two molds 5 are buckled with each other, when the clamping block 505 is inserted into the clamping groove 402, the middle rod 4 and the mold 5 can be kept relatively fixed.

[0037] On both sides of the two molds 5, strip plates 502 are fixed. Adjacent strip plates 502 are closely attached to each other and penetrated and inserted with a locking bolt 503. The tail end of the locking bolt 503 is screwed with a nut 504.

[0038] The strip plate 502 is provided to provide an installation position for fastening the mold 5. After the two molds 5 are combined, the locking bolt 503 is penetrated through the strip plate 502 and cooperated with the nut 504 to lock the two strip plates 502, keeping the two molds 5 firmly installed.

[0039] An inlet pipe 501 is fixedly penetrated through the upper part of the mold 5. The top end of the inlet pipe 501 extends obliquely upward out of the accommodation cavity 102. The upper end of the middle rod 4 exceeds the height of the accommodation cavity 102, and the upper end of the middle rod 4 is of a round head structure. The inlet pipe 501 is used to add metal powder into the mold 5, and powder can also be directly added from above the mold 5. The middle rod 4 with a round head structure enables the pressing ring 203 to move down more smoothly through the middle rod 4.

[0040] The inner diameter of the pressing ring 203 is equal to the diameter of the middle rod 4, and the outer diameter of the pressing ring 203 is equal to the diameter formed after the two molds 5 are combined.

[0041] A scale bar 3 is also fixed on the upper end of the workbench 1. A kit 301 is sleeved outside the scale bar 3. A base block 302 is fixed on the surface of the kit 301 close to the center of the workbench 1, and a push switch 303 is fixed on the base block 302. A limit bolt 304 is penetrated and screwed on the surface of the kit 301 away from the center of the workbench 1, and the tail end of the limit bolt 304 contacts the surface of the scale bar 3.

[0042] Adjust the height position of the adjustment kit 301 on the scale bar 3, then tighten the limit bolt 304 to keep the kit 301 relatively fixed with the scale bar 3. Then, the hydraulic cylinder 2 drives the connecting bar 201 to descend. When the connecting bar 201 moves down to contact the push switch 303, the hydraulic cylinder 2 stops, and the pressing ring 203 is pressed into the specified height position in the mold 5, achieving precise control of the pressing height.

[0043] The specific working principle of the present utility model is as follows: First, fasten the two molds 5 to each other. Insert the block 505 into the slot 402 to keep the middle rod 4 and the mold 5 relatively fixed. Pass the locking bolt 503 through the strip plate 502 and lock the two strip plates 502 with the nut 504 to keep the two molds 5 firmly installed. Then, screw the threaded section 401 at the lower part of the middle rod 4 into the threaded groove 103 to keep it relatively fixed with the workbench 1 and also keep it coincident with the central axes of the accommodation cavity 102 and the middle rod 4. Then, add metal powder into the mold 5 through the feeding pipe 501. After assembling a sufficient amount of metal powder, set the corresponding pressing height, adjust the height position of the adjustment kit 301 on the scale bar 3, and then tighten the limit bolt 304 to keep the kit 301 relatively fixed with the scale bar 3. Then, the hydraulic cylinder 2 drives the connecting bar 201, the pressing rod 202, the pressing ring 203, etc. to descend. The pressing ring 203 enters the mold 5 and is sleeved outside the middle rod 4 to press and form the metal powder between the outer wall of the middle rod 4 and the inner wall of the mold 5. When the connecting bar 201 moves down to contact the push switch 303, the hydraulic cylinder 2 stops, and the pressing ring 203 is pressed into the specified height position in the mold 5, achieving precise control of the pressing height and completing the pressing. Then, energize the electromagnetic coil 6 to work and heat up the mold 5, so that the metal powder, adhesive, etc. at the inner wall of the mold 5 are quickly dried, facilitating the demolding operation. Then, place the demolded filter element in a sintering furnace for sintering.

[0044] The above are only the preferred embodiments of the present utility model and do not limit the present utility model. Any modification to the technical solutions recorded in the foregoing embodiments, any equivalent replacement of some technical features, and any modification, equivalent replacement, and improvement made all fall within the protection scope of the present utility model.

Claims

1. A metal powder sintered filter element production device, comprising a workbench (1), a hydraulic cylinder (2), a scale bar (3), a center rod (4), a mold (5) and an electromagnetic coil (6), characterized in that: The workbench (1) is provided with a receiving cavity (102) inside, a middle rod (4) is screwed and fixed inside the receiving cavity (102), two arc-shaped and symmetrically distributed molds (5) are covered outside the middle rod (4), and an electromagnetic coil (6) is fixed inside the receiving cavity (102) outside the two molds (5); An L-shaped frame (101) is fixed to the rear side of the workbench (1), and the horizontal portion of the L-shaped frame (101) is located above the workbench (1), and a reinforcing rib (1011) is welded between two inner right-angled surfaces of the L-shaped frame (101); a hydraulic cylinder (2) is fixed above the horizontal portion of the L-shaped frame (101), a hydraulic rod at the telescopic end of the hydraulic cylinder (2) passes downward through the horizontal portion of the L-shaped frame (101) and is fixed with a connecting strip (201), and two pressure rods (202) are fixed to the bottom of the connecting strip (201), and a pressure ring (203) is commonly fixed to the bottoms of the two pressure rods (202).

2. The metal powder sintering filter element production equipment according to claim 1, characterized in that: The inner bottom of the accommodating cavity (102) is provided with a thread groove (103), the lower outer periphery of the middle rod (4) is provided with a thread segment (401), and the thread segment (401) of the middle rod (4) is screwed into the thread groove (103).

3. The metal powder sintering filter element production equipment according to claim 2, characterized in that: A clamping groove (402) is symmetrically provided on the outer circumference of the middle rod (4) above the threaded section (401), and a clamping block (505) is fixed on the inner arc surface of the lower end of the mold (5), and the clamping block (505) is inserted and clamped into the corresponding clamping groove (402).

4. The metal powder sintering filter element production equipment according to claim 1, characterized in that: Strips (502) are fixed on both sides of the two molds (5), and two adjacent strips (502) are tightly attached together and penetrated by locking bolts (503), and the tail ends of the locking bolts (503) are screwed with nuts (504).

5. The metal powder sintering filter element production equipment according to claim 1, characterized in that: A feed pipe (501) is fixedly passed through the upper part of the mould (5), the top end of the feed pipe (501) tilts upward and extends out of the accommodating cavity (102), the upper end of the middle rod (4) exceeds the height of the accommodating cavity (102), and the upper end of the middle rod (4) is a round head structure.

6. The metal powder sintering filter element production equipment according to claim 1, characterized in that: The inner diameter of the pressing ring (203) is equal to the diameter of the middle rod (4), and the outer diameter of the pressing ring (203) is equal to the diameter formed after the two molds (5) are combined.

7. The metal powder sintering filter element production equipment according to claim 1, characterized in that: A scale bar (3) is also fixed at the upper end of the workbench (1), and a sleeve (301) is provided on the outer cover of the scale bar (3). A base block (302) is fixed on a side of the sleeve (301) close to the center of the workbench (1), and a push switch (303) is fixed on the base block (302). A limit bolt (304) is screwed through a side of the sleeve (301) away from the center of the workbench (1), and the tail end of the limit bolt (304) contacts the surface of the scale bar (3).

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