Upright post and base mounting structure of numerical control machining center

Abstract

The utility model relates to the technical field of machining equipment, in particular to a numerical control machining center stand column and base installation structure which comprises a stand column body and a base body. The top face of the base body protrudes to form two installation parts distributed at intervals, the top faces of the installation parts are sunken to form limiting grooves and vibration reduction grooves, the bottom face of the stand column body is provided with butt joint parts corresponding to the installation parts, the butt joint parts make contact with the installation parts, the bottom faces of the butt joint parts protrude to form limiting blocks matched with the limiting grooves, and the limiting blocks are embedded in the limiting grooves. A locking screw rod is arranged on the butt joint part, penetrates through the butt joint part and the limiting part and is in threaded connection with the mounting part, a vibration reduction spring is arranged in the vibration reduction groove, one end of the vibration reduction spring abuts against the bottom of the vibration reduction groove, the other end of the vibration reduction spring abuts against the butt joint part, and through embedded matching of the limiting block and the limiting groove, accurate alignment is achieved; limiting and fixing of the front side and the rear side of the stand column can be added, and firmness of the stand column after installation is ensured.

Description

A mounting structure for the column and base of a CNC machining center Technical Field

[0001] This utility model relates to the field of processing equipment technology, and in particular to a column and base mounting structure for a CNC machining center. Background Technology

[0002] CNC machining centers generate strong vibrations during high-speed cutting. Traditional column and base mounting structures often use rigid connections, which have the following technical drawbacks: vibration energy is directly transmitted to the machine tool's foundation structure, leading to decreased machining accuracy and shortened machine tool life; the positioning of the column and base mainly relies on planar contact and bolt fastening, which is prone to micro-displacement under high-frequency vibration; existing vibration damping structures are mostly external designs, occupying a large space and affecting the overall rigidity of the machine tool; the installation process requires repeated alignment adjustments, resulting in low assembly efficiency. Summary of the Invention

[0003] The technical problem to be solved by this utility model is: in order to overcome the problems in the prior art where vibration energy is directly transmitted to the machine tool foundation structure, resulting in decreased machining accuracy and shortened machine tool life, and where the positioning of the column and base mainly relies on planar contact and bolt fastening, which is prone to micro-displacement under high-frequency vibration, a CNC machining center column and base mounting structure is provided.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a CNC machining center column and base mounting structure, including a column body and a base body;

[0005] The top surface of the base body has two spaced mounting parts that protrude from it, and the top surface of the mounting parts has recesses that form limit grooves and vibration damping grooves.

[0006] The bottom surface of the column body has a docking part corresponding to the mounting part. The docking part contacts the mounting part, and the bottom surface of the docking part protrudes to form a limiting block that matches the limiting groove. The limiting block is fitted into the limiting groove. The docking part has a locking screw that passes through the docking part and the limiting part and is threadedly connected to the mounting part. The vibration damping groove has a vibration damping spring. One end of the vibration damping spring abuts against the bottom of the vibration damping groove, and the other end abuts against the docking part. Through the embedded cooperation of the limiting block and the limiting groove, precise positioning is achieved. It can also add front and rear limiting fixation to the column to ensure the firmness of the column after installation. The vibration damping spring and the damping layer form a composite vibration damping system, which can reduce the vibration transmission rate and significantly improve the vibration damping effect.

[0007] To address the issue of wear on the contact surface caused by localized stress concentration, the design further includes a support portion protruding from the bottom surface of the mating part, which is used to contact the top surface of the base body.

[0008] To address the issue of preventing the column from swaying and shifting under lateral vibration, the system further includes contact between the inner side of the support portion and the outer side of the mounting portion on the same side.

[0009] To solve the problem of interference between the limiting block and the limiting groove during installation, the support part is further provided with a guide surface that tapers inward from bottom to top on the bottom side near the mounting part.

[0010] It further includes an installation section located between two support sections.

[0011] To address the issue of lateral bending failure of the damping spring, a connecting post is further included on the bottom surface of the mating part, and the damping spring is sleeved on the connecting post.

[0012] Further, the inner wall of the vibration damping groove is provided with a damping layer, which is made of polymer composite material and has honeycomb-shaped energy-absorbing holes on its surface; the vibration damping spring is a variable pitch spring, and the two ends of the spring are flexibly connected to the bottom of the vibration damping groove and the docking part respectively through spherical washers.

[0013] The beneficial effects of this utility model are as follows: The CNC machining center column and base installation structure provided by this utility model achieves precise positioning through the embedded cooperation of the limiting block and the limiting groove. It can also add front and rear limiting fixation to the column to ensure the firmness of the column after installation. The vibration damping spring and the damping layer form a composite vibration damping system, which can reduce the vibration transmission rate and significantly improve the vibration damping effect. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 is a structural schematic diagram of this utility model;

[0016] Figure 2 is an enlarged structural schematic diagram of point A in Figure 1 of this utility model;

[0017] Figure 3 is a structural schematic diagram of this utility model in cross-sectional view as shown in Figure 2.

[0018] In the diagram: 1. Column body, 11. Connecting part, 111. Limiting block, 112. Support part, 1121. Guide surface, 113. Connecting column, 2. Base body, 21. Mounting part, 211. Limiting groove, 212. Vibration damping groove, 2121. Damping layer, 3. Locking screw, 4. Vibration damping spring. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0020] Figure 1 is a schematic diagram of the structure of this utility model, a CNC machining center column and base mounting structure, including column body 1 and base body 2;

[0021] As shown in Figures 2 and 3, two spaced mounting portions 21 protrude from the top surface of the base body 2, and the top surface of the mounting portions 21 is recessed to form a limiting groove 211 and a vibration damping groove 212.

[0022] The bottom surface of the column body 1 has a docking part 11 corresponding to the mounting part 21. The docking part 11 contacts the mounting part 21. The bottom surface of the docking part 11 protrudes to form a limiting block 111 that matches the limiting groove 211. The limiting block 111 is fitted into the limiting groove 211. The docking part 11 has a locking screw 3. The locking screw 3 passes through the docking part 11 and the limiting part and is threadedly connected to the mounting part 21. The vibration damping groove 212 has a vibration damping spring 4. One end of the vibration damping spring 4 abuts against the bottom of the vibration damping groove 212 and the other end abuts against the docking part 11. Through the embedded cooperation between the limiting block 111 and the limiting groove 211, precise positioning is achieved. It can also add front and rear limiting fixation to the column to ensure the firmness of the column after installation.

[0023] As shown in Figures 2 and 3, a support portion 112 is formed on the bottom surface of the docking part 11. The support portion 112 is used to contact the top surface of the base body 2. The support portion 112 forms a distributed load support surface, which reduces the contact stress.

[0024] As shown in Figures 2 and 3, the inner side of the support part 112 contacts the outer side of the mounting part 21 on the same side, forming a surface constraint through the side contact, thereby improving the lateral stiffness.

[0025] As shown in Figures 2 and 3, the bottom side of the support part 112 near the mounting part 21 has an inlet surface 1121 that tapers inward from bottom to top. The inlet surface 1121 forms a 15-30° guide slope, which improves the alignment tolerance.

[0026] As shown in Figures 2 and 3, the mounting part 21 is located between the two support parts 112, ensuring that the mounting part 21 is in the optimal mechanical support position, improving the structural compactness, and the two mounting parts 21 corresponding to the support parts 112 can provide lateral limiting and fixing for the column body 1.

[0027] As shown in Figures 2 and 3, a connecting post 113 is formed on the bottom surface of the docking part 11. The damping spring 4 is sleeved on the connecting post 113. The connecting post provides radial constraint and can control the spring deflection angle.

[0028] As shown in Figures 2 and 3, a damping layer 2121 is provided on the inner wall of the vibration damping groove 212. The damping layer 2121 is made of polymer composite material and has honeycomb-shaped energy-absorbing holes on its surface. The vibration damping spring 4 is a variable pitch spring, and the two ends of the spring are flexibly connected to the bottom of the vibration damping groove 212 and the docking part 11 through spherical washers. Through the multi-stage energy absorption of the damping layer 2121 and the variable pitch spring, the transmission of high-frequency vibration is significantly reduced. The corrugated protective cover prevents foreign objects from entering. The vibration damping spring 4 and the damping layer 2121 form a composite vibration damping system, which can reduce the vibration transmission rate and significantly improve the vibration damping effect.

[0029] Installation process: Place the base body 2 horizontally on the mounting base surface, ensuring the flatness of the two mounting parts 21. Hoist the column body 1 so that the support part 112 of the docking part 11 initially contacts the top surface of the base body 2. Align the limiting block 111 with the limiting groove 112 and slowly lower the column body 1. The limiting block 111 slides into the limiting groove 112 along the guide surface 1121 to achieve coarse positioning. The support part 112 contacts the outer side of the mounting part 21 to form a surface constraint. Screw in the locking screw 3 for pre-tightening so that the docking part 11 and the mounting part 21 form a surface contact. Check the compression of the vibration damping spring 4 to ensure that the spring preload is controlled at 10-15% of the free length. Perform dynamic registration.

[0030] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A mounting structure for a column and base of a CNC machining center, characterized in that, The system includes a column body (1) and a base body (2); the top surface of the base body (2) has two spaced mounting portions (21) protruding outwards, and the top surface of the mounting portions (21) has a limiting groove (211) and a vibration damping groove (212) recessed inwards; the bottom surface of the column body (1) has a docking portion (11) corresponding to the mounting portion (21), the docking portion (11) and the mounting portion (21) are in contact, and the bottom surface of the docking portion (11) protrudes outwards to form a limiting groove (211) corresponding to the mounting portion (21). A limiting block (111) matches the groove (211), the limiting block (111) is fitted into the limiting groove (211), the docking part (11) has a locking screw (3), the locking screw (3) passes through the docking part (11) and the limiting part and is threadedly connected to the mounting part (21), the vibration damping groove (212) has a vibration damping spring (4), one end of the vibration damping spring (4) abuts against the bottom of the vibration damping groove (212) and the other end abuts against the docking part (11).

2. The mounting structure for the column and base of a CNC machining center as described in claim 1, characterized in that: The bottom surface of the docking part (11) protrudes to form a support part (112), which is used to contact the top surface of the base body (2).

3. The mounting structure for the column and base of a CNC machining center as described in claim 2, characterized in that: The inner side of the support (112) contacts the outer side of the mounting part (21) on the same side.

4. The mounting structure for the column and base of a CNC machining center as described in claim 2, characterized in that: The support (112) has a guide surface (1121) that tapers inward from bottom to top on the bottom side near the mounting part (21).

5. The mounting structure for the column and base of a CNC machining center as described in claim 2, characterized in that: The mounting part (21) is located between the two support parts (112).

6. The mounting structure for the column and base of a CNC machining center as described in claim 1, characterized in that: The bottom surface of the docking part (11) protrudes to form a connecting post (113), and the damping spring (4) is sleeved on the connecting post (113).

7. The mounting structure for the column and base of a CNC machining center as described in claim 1, characterized in that: The inner wall of the damping groove (212) is provided with a damping layer (2121), which is made of polymer composite material and has honeycomb-shaped energy-absorbing holes on its surface; the damping spring (4) is a variable pitch spring, and the two ends of the spring are flexibly connected to the bottom of the damping groove (212) and the docking part (11) respectively through spherical washers.

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