Frame pre-tightening structure of powder forming press

Abstract

The utility model relates to a frame pre-tightening structure of a powder forming press, and relates to the field of powder forming equipment. The frame pre-tightening structure of the powder forming press comprises a stand column, a first base and a second base, the two ends of the stand column are fixedly connected with the first base and the second base respectively, and the stand column, the first base and the second base form a fixing frame of the powder forming press. A pull rod penetrates through the stand column in the length direction of the stand column, the pull rod penetrates out of the two ends of the stand column and penetrates through the first base and the second base respectively, one end, penetrating out of the second base, of the pull rod is fixed to the second base, and one end, penetrating out of the first base, of the pull rod is in threaded connection with a pre-tightening nut. The pre-tightening device has the advantage that the pre-tightening effect can be achieved only by performing pre-tightening operation on one end of the pull rod.

Description

Technical Field

[0001] The present application relates to the field of powder forming equipment, and in particular to a frame pre-tightening structure of a powder forming press. Background Art

[0002] A powder forming press is a device that compresses metal or ceramic powder into a fixed-shape product. Common types of powder forming presses include frame-type hydraulic presses and four-column hydraulic presses. Frame-type hydraulic presses are generally suitable for processing large workpieces, while four-column hydraulic presses are generally suitable for processing small and medium-sized workpieces. For large powder forming presses, employing an effective preload mechanism is crucial to ensure stable performance and long service life.

[0003] Four-column powder forming presses typically use a combination of pre-tightening bolts and columns. The pre-tightening bolts are fixed at both ends of the columns, with the rods passing through the upper and lower bases. The ends of the columns rest against the bases, and after tightening, they are secured with pre-tightening nuts to achieve pre-tightening. However, this pre-tightening method requires pre-tightening bolts to be installed at both ends of the columns, making it inconvenient to perform the pre-tightening operation at the bottom of the column. Utility Model Content

[0004] In order to solve the problem that a powder forming machine needs to install pre-tightening nuts at both ends of the column to achieve pre-tightening, the present application provides a frame pre-tightening structure of a powder forming press.

[0005] The frame pre-tightening structure of a powder forming press provided in this application adopts the following technical solution:

[0006] A frame pre-tightening structure for a powder forming press, comprising:

[0007] pillars;

[0008] First Plinth;

[0009] a second base, wherein both ends of the column are fixedly connected to the first base and the second base respectively;

[0010] A pull rod, the pull rod passing through the column along its length, the pull rod passing through both ends of the column and passing through the first base and the second base, one end of the pull rod being fixed to the second base;

[0011] A pre-tightening nut is threadedly connected to an end of the pull rod close to the first base, and the pre-tightening nut is pressed against the first base.

[0012] By adopting this technical solution, the tie rod completely penetrates the column along its length and exits through the first and second bases. One end of the tie rod is fixed to the second base, and the other end of the tie rod is threadedly connected to a preload nut. During the preload operation, a specific tool is used to tension one end of the tie rod, and then the preload nut is tightened until it presses against the first base. Since the tie rod extends throughout the entire column and one end is fixed to the second base, preload only needs to be performed on one end of the tie rod.

[0013] Preferably, one end of the pull rod is provided with a fixture, and the fixture is fixedly connected to the pull rod for tightening the pull rod.

[0014] Preferably, the tooling fixture includes a fixedly connected oil cylinder, an outer sleeve and an inner sleeve, the oil cylinder has a fixedly connected piston rod, the piston rod is located in the inner sleeve, the piston rod and the pull rod are coaxially arranged, the inner sleeve is fixedly connected to the piston rod, the inner sleeve is fixedly connected to the pull rod, one end of the inner sleeve abuts the pre-tightening nut, the outer sleeve is sleeved outside the inner sleeve, and one end of the outer sleeve abuts the first base.

[0015] Preferably, the outer sleeve is provided with openings in its circumference.

[0016] Preferably, the pre-tightening nut is provided with openings in the circumference.

[0017] Preferably, the end of the pull rod close to the second base has a fixing nut, the fixing nut is threadedly connected to the end of the pull rod, and the fixing nut is pressed against the second base.

[0018] Preferably, a shaft sleeve is provided on the pull rod, and the shaft sleeve abuts against two ends of the column.

[0019] Preferably, a washer is sleeved on the pull rod, and the washer is located between the pre-tightening nut and the first base.

[0020] Preferably, the column has a fixing block for fixing and connecting external components.

[0021] Preferably, the fixing block includes a first fixing plate and a second fixing plate, the first fixing plate is fixed on the column, and the second fixing plate is fixedly connected to the first fixing plate.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] The pre-tightening operation is simple, and only one end of the pull rod needs to be pre-tightened;

[0024] The pre-tightening effect is better, the tie rod runs through the column, and the longer length of the tie rod can disperse the stress and improve the fatigue strength;

[0025] The upright column, the first base and the second base form a fixed frame structure, and are fixed to the external components through the fixing block, so that the stability and connection strength of the entire powder molding press are better. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the frame pre-tightening structure of the powder forming press in the embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of the pull rod and the column in the embodiment of the present application.

[0028] Figure 3 It is a cross-sectional view of the frame pre-tightening structure of the powder forming press in the embodiment of the present application.

[0029] Figure 4 It is an exploded schematic diagram of the tooling fixture in the embodiment of the present application.

[0030] Explanation of the accompanying drawings: 1. Column; 2. First base; 3. Second base; 4. Pull rod; 5. Pre-tightening nut; 6. Fixing nut; 7. Bushing; 51. Opening; 8. Fixture; 81. Cylinder; 82. Outer sleeve; 83. Inner sleeve; 84. Piston rod; 821. Opening; 9. Washer; 11. Fixing block; 111. First fixing plate; 112. Second fixing plate. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The embodiment of the present application discloses a frame pre-tightening structure of a powder forming press. Figure 1 and Figure 2 A frame pre-tightening structure of a powder molding press includes a column 1, a first base 2, and a second base 3. The two ends of the column 1 are fixedly connected to the first base 2 and the second base 3 respectively. The column 1, the first base 2, and the second base 3 constitute a fixed frame of the powder molding press. A pull rod 4 is passed through the column 1 along the length direction of the column 1. The pull rod 4 passes through the two ends of the column 1 and passes through the first base 2 and the second base 3 respectively. One end of the pull rod 4 passing through the second base 3 is fixed to the second base 3, and one end of the pull rod 4 passing through the first base 2 is threadedly connected to a pre-tightening nut 5. The pre-tightening of the powder molding press frame can be achieved by tensioning one end of the pull rod 4 passing through the first base 2 and then tightening the pre-tightening nut 5 so that the pre-tightening nut 5 is pressed against the first base 2.

[0033] There are four columns 1, which are hollow cylinders. The four columns 1 are fixed between the first base 2 and the second base 3 to form a four-column and two-beam frame structure. The columns 1 and the first base 2 and the second base 3 can be fixed by welding, threaded connection, etc. The embodiment of the present application adopts a threaded connection method.

[0034] The tie rod 4 passes through both ends of the column 1, passing through the first base 2 and the second base 3, respectively. One end of the tie rod 4 extending from the first base 2 passes through a pre-tightening nut 5 and is threadedly connected to the pre-tightening nut 5. The end of the tie rod 4 extending from the second base 3 is fixed to the second base 3. Specifically, one end of the tie rod 4 extending from the second base 3 has a fixing nut 6, which is threadedly connected to the tie rod 4. The fixing nut 6 is always tightened and abuts the side of the second base 3 facing away from the first base 2. In addition to threaded connection, the tie rod 4 and the second base 3 can also be fixed by welding or other fasteners.

[0035] Reference Figure 2 and Figure 3 A shaft sleeve 7 is provided on the pull rod 4, and the shaft sleeve 7 is located at the connection between the column 1 and the first base 2 and the column 1 and the second base 3. The shaft sleeve 7 is made of wear-resistant material so that the pull rod 4 does not wear against the first base 2 and the column 1 when sliding, thereby extending the service life of the pull rod 4.

[0036] Reference Figure 1 The pre-tightening nut 5 has several openings 51 around its circumference, which are used to insert a wrench to tighten the pre-tightening nut 5. A washer 9 is sleeved on the pull rod 4 and positioned between the pre-tightening nut 5 and the first base 2. The two sides of the washer 9 abut the pre-tightening nut 5 and the first base 2, respectively. The washer 9 prevents loosening and reduces pressure on the surface of the first base 2.

[0037] Reference Figure 3 and Figure 4The end of the pull rod 4 near the first base 2 has a fixture 8, which includes a cylinder 81, an outer sleeve 82, and an inner sleeve 83. A piston rod 84 is fixedly connected to the central axis of the cylinder 81. The piston rod 84 is located within the inner sleeve 83. The piston rod 84 is coaxial with the pull rod 4. The inner sleeve 83 and the piston rod 84 are fixedly connected by bolts or other means. The inner sleeve 83 and the pull rod 4 are also fixedly connected by bolts or other means, thereby ensuring that the piston rod 84 and the pull rod 4 are coaxially fixed. One end of the inner sleeve 83 abuts the pre-tightening nut 5. The outer sleeve 82 is sleeved outside the inner sleeve 83, and one end of the outer sleeve 82 abuts the first base 2. When the piston rod 84 moves away from the first base 2, the inner sleeve 83 drives the pull rod 4 to move away from the first base 2. The outer sleeve 82 is provided with an opening 821 in the circumference thereof, which allows the opening 51 to communicate with the outside, so that a wrench can be inserted into the opening 51 through the opening 821 to tighten the pre-tightening nut 5. Specifically, the oil cylinder 81 can be a lever-type oil pressure cylinder or a hydraulic oil cylinder.

[0038] Reference Figure 1 Column 1 has a fixing block 11 for securing external components. Fixing block 11 includes a first fixing plate 111 and a second fixing plate. First fixing plate 111 and second fixing plate are fixedly connected. First fixing plate 111 is fixedly connected to column 1 by welding or threading. The second fixing plate is used to connect external components and can be designed in different shapes and sizes depending on the installation location of different components.

[0039] The implementation principle of the frame pre-tightening structure of a powder molding press according to an embodiment of the present application is as follows: the two ends of a column 1 are fixedly connected to a first base 2 and a second base 3, respectively. A pull rod 4 extends through the column 1 along its length. The pull rod 4 extends from both ends of the column 1 and passes through the first base 2 and the second base 3, respectively. One end of the pull rod 4 extending from the second base 3 is threadedly connected to the second base 3 via a fixing nut 6, and one end of the pull rod 4 extending from the first base 2 is threadedly connected to a pre-tightening nut 5. A fixture 8 is provided on the pre-tightening nut 5, which is fixedly connected to the pull rod 4. During the pre-tightening operation, the fixture 8 is used to tension the pull rod 4 in a direction away from the first base 2. After a certain pre-tightening force requirement is met, a certain gap is formed between the pre-tightening nut 5 and the first base 2. Then, a wrench is inserted from the opening 821 into the opening 51 and the pre-tightening nut 5 is screwed until it is pressed against the first base 2, thereby achieving pre-tightening of the powder molding press frame.

[0040] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A frame pre-tightening structure for a powder forming press, characterized in that: include: Column (1); a first base (2); A second base (3), with both ends of the column (1) being fixedly connected to the first base (2) and the second base (3) respectively; A pull rod (4), the pull rod (4) passes through the column (1) along the length direction of the column (1), the pull rod (4) passes through both ends of the column (1) and passes through the first base (2) and the second base (3), and one end of the pull rod (4) is fixed on the second base (3); a pre-tightening nut (5), the pre-tightening nut (5) being threadedly connected to an end of the pull rod (4) close to the first base (2), the pre-tightening nut (5) being pressed against the first base (2); The pull rod (4) is connected to one end of the pre-tightening nut (5) and is provided with a fixture (8). The fixture (8) is fixedly connected to the pull rod (4) for tightening the pull rod (4). The fixture (8) includes a fixedly connected oil cylinder (81), an outer sleeve (82) and an inner sleeve (83). The oil cylinder (81) is provided with a fixedly connected piston rod (84). The piston rod (84) is located in the inner sleeve (83). The piston rod (84) is coaxially arranged with the pull rod (4). The inner sleeve (83) is fixedly connected to the piston rod (84). The inner sleeve (83) is fixedly connected to the pull rod (4). One end of the inner sleeve (83) abuts the pre-tightening nut (5). The outer sleeve (82) is sleeved outside the inner sleeve (83). One end of the outer sleeve (82) abuts the first base (2).

2. The frame pre-tightening structure of the powder molding press according to claim 1, characterized in that: The outer sleeve (82) is provided with an opening (821) in the circumferential direction.

3. The frame pre-tightening structure of the powder molding press according to claim 1, characterized in that: The pre-tightening nut (5) is provided with an opening (51) in the circumferential direction.

4. The frame pre-tightening structure of the powder molding press according to claim 1, characterized in that: One end of the pull rod (4) close to the second base (3) is provided with a fixing nut (6), the fixing nut (6) is threadedly connected to one end of the pull rod (4), and the fixing nut (6) is pressed against the second base (3).

5. The frame pre-tightening structure of the powder molding press according to claim 1, characterized in that: A shaft sleeve (7) is sleeved on the pull rod (4), and the shaft sleeve (7) abuts against both ends of the column (1).

6. The frame pre-tightening structure of the powder molding press according to claim 1, characterized in that: A washer (9) is sleeved on the pull rod (4), and the washer (9) is located between the pre-tightening nut (5) and the first base (2).

7. The frame pre-tightening structure of the powder molding press according to claim 1, characterized in that: The upright post (1) is provided with a fixing block (11) for fixing and connecting external components.

8. The frame pre-tightening structure of the powder molding press according to claim 7, characterized in that: The fixing block (11) comprises a first fixing plate (111) and a second fixing plate, wherein the first fixing plate (111) is fixed on the column (1), and the second fixing plate is fixedly connected to the first fixing plate (111).

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