An embedded damping composite shock absorbing base for machine tools

Abstract

The utility model belongs to machine tool damping device technical field, concretely relates to a kind of embedded damping composite damping base for machine tool;Including: buffer main body, including the upper buffer plate and lower buffer plate of oppositely arranged, the lower surface of upper buffer plate and the upper surface of lower buffer plate are correspondingly provided with several interval arrangement's arc installation slot;Composite damping unit, embedding in each arc installation slot;Column rib shock absorber, with cylindrical protruding portion and the rib portion of connecting each cylindrical protruding portion, cylindrical protruding portion is clamped between two composite damping units opposite to each other;Wherein, the hollow region between upper buffer plate and lower buffer plate, the periphery of column rib shock absorber and adjacent cylindrical protruding portion forms the shock insulation air cavity of intercommunication.This utility model can obtain a kind of embedded damping composite damping base for machine tool by the above technical scheme, which can consider shock insulation performance and resonance suppression effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of machine tool vibration reduction devices, specifically relating to an embedded damping composite vibration reduction base for machine tools. Background Technology

[0002] The shock-absorbing base is installed at the bottom of precision machine tools such as milling machines to support the machine body, buffer the alternating impact generated by cutting operations, and block the transmission of ground vibration to the processing area, thus ensuring the machining accuracy of the workpiece.

[0003] Existing machine tool vibration damping mostly adopts a single rubber damping pad structure. Although it is simple in structure and easy to install, it has limited effect on suppressing the mid-frequency resonance peak generated by high-speed cutting. It is easy to cause tool chatter under dual-spindle milling conditions, resulting in workpiece surface vibration marks and dimensional accuracy fluctuations. If a damping structure is added to improve the vibration damping capacity, the conventional method of laying the entire surface will form a continuous solid vibration transmission path, which will greatly weaken the vibration isolation and buffering effect of the base and make it difficult to meet the vibration isolation and damping requirements of precision machining at the same time. Utility Model Content

[0004] This invention solves the problems mentioned in the background art by embedding composite damping units in the corresponding arc mounting grooves of the upper and lower buffer plates, and clamping the column rib damping body with the upper and lower composite damping units, forming a connected vibration isolation air cavity between the buffer plates, thereby achieving a synergistic vibration reduction effect of air isolation and nodal damping.

[0005] The technical solution of this utility model is implemented as follows: a machine tool embedded damping composite vibration damping base, comprising: The buffer body includes an upper buffer plate and a lower buffer plate arranged opposite to each other. The lower surface of the upper buffer plate and the upper surface of the lower buffer plate are provided with a number of arc mounting grooves arranged at intervals. Composite damping units are embedded in each arc mounting slot; The column-rib damper has cylindrical protrusions and ribs connecting the cylindrical protrusions, wherein the cylindrical protrusions are clamped between two upper and lower opposing composite damping units. The hollow areas between the upper and lower buffer plates, the periphery of the column rib damper, and the adjacent cylindrical protrusions form a connected vibration isolation air cavity.

[0006] The present invention is further configured such that the composite damping unit includes two reinforcing plates stacked on top of each other and a flame-retardant foamed elastomer disposed between the reinforcing plates.

[0007] The present invention is further configured such that the side of the reinforcing plate facing the column rib damping body is provided with an arc-shaped supporting surface, and the arc-shaped supporting surface matches the outer wall of the cylindrical protrusion.

[0008] The present invention is further configured such that the column rib damping body is an integrally formed structure, and the axes of each cylindrical protrusion are parallel to each other.

[0009] The present invention is further configured such that the side wall of the upper buffer plate extends downward to provide a chip-blocking edge, the end of the chip-blocking edge is bent inward to form a chip-blocking lip, and an air gap is reserved between the chip-blocking lip and the side wall of the lower buffer plate.

[0010] The present invention is further provided that the bottom surface of the lower buffer plate is provided with an anti-slip buffer pad.

[0011] By adopting the above technical solution, the beneficial effects that this utility model can achieve are: 1. By combining the interconnected air isolation cavity with the composite damping unit embedded in the node, low-frequency air isolation and mid-frequency damping energy dissipation are achieved simultaneously, covering vibration attenuation across the entire frequency band and improving the wideband vibration reduction performance of the damping base.

[0012] 2. By cooperating with the cylindrical protrusion of the column-rib damper and the arc support surface of the composite damping unit, the bearing pressure is dispersed and lateral constraint is formed, which restricts the lateral movement of the damper and improves the bearing stability and anti-eccentric load capacity of the base.

[0013] 3. By combining the downward-extending chip-blocking edge with the reserved ventilation gap, iron filings are prevented from entering the cavity while ensuring free airflow, avoiding wear of internal components and abnormal rigidity of the air chamber, thus improving the adaptability of the base to working conditions and its service life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the application status of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a three-dimensional structural schematic diagram of the present invention; Figure 4 for Figure 2 Enlarged structural diagram of section A in the middle.

[0015] The attached figures are labeled as follows: 1. Buffer body; 10. Upper buffer plate; 11. Lower buffer plate; 2. Arc mounting groove; 3. Composite damping unit; 30. Reinforcing plate; 31. Flame-retardant foamed elastomer; 4. Column rib damper; 40. Cylindrical protrusion; 41. Rib; 5. Vibration isolation air cavity; 6. Arc support surface; 7. Chip guard edge; 8. Chip guard lip; 9. Ventilation gap; 12. Anti-slip buffer pad. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-4 : Example: This embodiment provides an embedded damping composite vibration damping base for machine tools, comprising: The buffer body 1 includes an upper buffer plate 10 and a lower buffer plate 11 arranged opposite to each other. The lower surface of the upper buffer plate 10 and the upper surface of the lower buffer plate 11 are provided with a plurality of arc mounting grooves 2 arranged at intervals. The composite damping unit 3 is embedded in each arc mounting groove 2; The column-rib damper 4 has a cylindrical protrusion 40 and a rib 41 connecting each cylindrical protrusion 40. The cylindrical protrusion 40 is clamped between two upper and lower opposing composite damping units 3. The hollow areas between the upper buffer plate 10 and the lower buffer plate 11, the periphery of the column rib damper 4, and the adjacent cylindrical protrusions 40 form a connected vibration isolation air cavity 5.

[0017] This embodiment provides an embedded damping composite shock absorber base for machine tools, which is installed at the bottom bearing point of a precision machining machine tool to support the machine body, attenuate the alternating impact generated by cutting operations, and at the same time block the transmission of ground environmental vibrations to the machining area.

[0018] The buffer body 1, serving as the load-bearing carrier of the entire shock-absorbing base, consists of an upper buffer plate 10 and a lower buffer plate 11 arranged opposite to each other. Both are rectangular metal plates. The upper buffer plate 10 is located at the top, with its top surface supporting the machine tool body, while the lower buffer plate 11 is located at the bottom, with its bottom surface contacting the mounting foundation. The lower surface of the upper buffer plate 10 and the upper surface of the lower buffer plate 11 are machined with several spaced arc mounting grooves 2. The arc mounting groove 2 is a concave arc-shaped long groove extending along the length of the plate. The cross-sectional curvature of the groove matches the outer curvature of the composite damping unit 3. The groove is formed by milling the plate and is not continuous at both ends, naturally forming groove end guards to accommodate and restrict the lateral displacement of the composite damping unit 3. The groove end guards at both ends of the arc mounting groove 2 can restrict the movement of the composite damping unit 3 along the length of the groove, achieving bidirectional positioning. The upper buffer plate 10 and the lower buffer plate 11 are provided with corresponding positioning pins and positioning holes at their corners to limit the lateral relative displacement between the upper and lower buffer plates 11 and ensure that the two always remain aligned.

[0019] The composite damping unit 3 is used to dissipate vibration energy and suppress mid-frequency resonance caused by cutting impact. It consists of two stacked reinforcing plates 30 and a flame-retardant foamed elastomer 31 sandwiched between the two reinforcing plates 30. The whole is an arc-shaped long strip block adapted to the arc mounting groove 2. The composite damping unit 3 is embedded in each arc mounting groove 2 by interference fit. Its outer arc surface is tightly fitted to the inner wall of the arc mounting groove 2. Lateral and axial positioning is achieved by the side wall of the groove and the end stop. If necessary, adhesive can be applied to the bottom of the groove to assist in fixation. The reinforcing plate 30 facing the column rib damper 4 has an arc-shaped support surface 6. The curvature of the arc-shaped support surface 6 is consistent with the curvature of the outer wall of the cylindrical protrusion 40. The two surfaces are in contact and can evenly distribute the load transmitted by the cylindrical protrusion 40, while limiting the lateral displacement of the column rib damper 4. The reinforcing plate 30 and the flame-retardant foamed elastomer 31 are composited by molding process. The contact surface of the two is provided with a grid-like interlocking structure, which can improve the interlayer bonding strength. At the same time, the vibration energy is dissipated by interlayer friction during vibration.

[0020] The column-rib damper 4, as the main elastic support component, bears the equipment load and achieves foundation buffering through elastic deformation. It is a one-piece molded structure composed of multiple cylindrical protrusions 40 and ribs 41 connecting each cylindrical protrusion 40. Each cylindrical protrusion 40 is a cylindrical structure with parallel axes, and adjacent cylindrical protrusions 40 are connected by thin-plate ribs 41 to form a continuous whole. The column-rib damper 4 is disposed between the upper buffer plate 10 and the lower buffer plate 11, and each of its cylindrical protrusions 40 is clamped within... Between the two opposing composite damping units 3, the outer wall of the cylindrical protrusion 40 is tightly fitted with the arc-shaped support surface 6 of the composite damping unit 3, and the positioning is achieved by the clamping force and the lateral constraint of the arc surface; the rib 41 is suspended in the space between the upper and lower buffer plates 11 and does not contact the upper and lower buffer plates 11, so as to retain the complete hollow space; the column rib damper 4 can be made of polyurethane elastomer, which is suitable for working conditions with high load requirements, or it can be made of nitrile rubber, which is suitable for oil-resistant working conditions with cutting fluid splashing.

[0021] The vibration isolation air cavity 5 is formed by the upper buffer plate 10, the lower buffer plate 11 and the column rib damper 4. It is a continuous and interconnected hollow space, distributed around the column rib damper 4 and between the adjacent cylindrical protrusions 40. The vertical boundary of the cavity is the relative inner surface of the upper and lower buffer plates 11, and the horizontal boundary is the outer wall of the column rib damper 4. The vibration isolation air cavity 5 is not sealed and can be connected to the outside air through the gaps around the base. During the vibration reduction process, air can freely enter and exit the cavity. Low-frequency vibration isolation is achieved by relying on the compressibility of the air medium, blocking the vibration transmission path of rigid solids.

[0022] The upper buffer plate 10 has chip-blocking edges 7 on its four sides to prevent foreign objects such as iron filings and cutting fluid generated during processing from entering the base. The chip-blocking edges 7 are strip-shaped structures made of thin sheet metal bent into shape. The upper end of the strip is fixed by multiple screws at intervals along the side wall of the upper buffer plate 10. The strip extends downward as a whole, and the end is bent inward to form a chip-blocking lip 8. A uniform ventilation gap 9 is reserved between the chip-blocking lip 8 and the side wall of the lower buffer plate 11. The two do not contact each other, which ensures that the air isolation cavity 5 and the external air flow channel are unobstructed while preventing foreign objects from falling vertically into the air.

[0023] The bottom surface of the lower buffer plate 11 is provided with an anti-slip buffer pad 12, which is used to increase the friction between the base and the installation foundation and prevent the base from slipping due to vibration. The anti-slip buffer pad 12 is a sheet-like elastic structure. Its top surface is completely attached to the bottom surface of the lower buffer plate 11 by adhesive bonding. The bottom surface is in direct contact with the installation foundation, which can help attenuate the small vibrations transmitted from the ground.

[0024] In practical applications, multiple shock-absorbing bases can be arranged in a dot matrix pattern at the load-bearing points on the bottom of the equipment. Each base is independent of the others and has no rigid connection, but together they support the equipment body. The arrangement position can be flexibly adjusted according to the distribution of the reinforcing ribs on the bottom of the equipment to avoid pipelines and protruding structures.

[0025] During equipment operation, loads generated by cutting impacts or ground vibrations are transmitted to each composite damping unit 3 via the upper buffer plate 10, and then to the column rib damping body 4 via the cylindrical protrusion 40. Vertical vibrations are initially buffered by the elastic deformation of the column rib damping body 4, absorbing some vibration energy. Subsequently, the composite damping unit 3 precisely dissipates mid-frequency vibration energy and suppresses the generation of the inherent resonance peak of the air spring through the compression deformation and interlayer friction of the flame-retardant foamed elastomer 31. At the same time, the air in the isolation air cavity 5 achieves flexible low-frequency vibration isolation through compression and expansion, blocking the solid vibration transmission path. The three work together to achieve full-frequency vibration attenuation, which not only retains the excellent low-frequency vibration isolation performance of the air medium, but also solves the problem of mid-frequency resonance that is easy to be generated by a single air cavity structure. During operation, the chip baffle 7 continuously blocks foreign objects falling from above from entering the cavity, the ventilation gap 9 maintains the normal ventilation state of the air cavity, and avoids abnormal air pressure in the cavity from changing the damping characteristics. The anti-slip buffer pad 12 maintains the stability of the base and prevents the base from sliding laterally.

[0026] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A machine tool embedded damping composite vibration damping base, characterized in that, include: The buffer body (1) includes an upper buffer plate (10) and a lower buffer plate (11) arranged opposite to each other. The lower surface of the upper buffer plate (10) and the upper surface of the lower buffer plate (11) are provided with a number of arc mounting grooves (2) arranged at intervals. Composite damping unit (3) is embedded in each arc mounting groove (2); The column-rib damper (4) has a cylindrical protrusion (40) and a rib (41) connecting each cylindrical protrusion (40), wherein the cylindrical protrusion (40) is sandwiched between two upper and lower opposing composite damping units (3). Among them, the hollow areas between the upper buffer plate (10) and the lower buffer plate (11), the periphery of the column rib damper (4), and the adjacent cylindrical protrusions (40) form a connected vibration isolation air cavity (5).

2. The embedded damping composite vibration damping base for machine tools according to claim 1, characterized in that, The composite damping unit (3) includes two reinforcing plates (30) stacked on top of each other and a flame-retardant foamed elastomer (31) disposed between the reinforcing plates (30).

3. The embedded damping composite vibration damping base for machine tools according to claim 2, characterized in that, The composite damping unit (3) has an arc-shaped support surface (6) on the surface of the reinforcing plate (30) facing the column rib damper (4), and the arc-shaped support surface (6) matches the outer wall of the cylindrical protrusion (40).

4. The embedded damping composite vibration damping base for machine tools according to claim 1, characterized in that, The column rib damper (4) is an integrally formed structure, and the axes of each cylindrical protrusion (40) are parallel to each other.

5. A machine tool embedded damping composite vibration damping base according to claim 1, characterized in that, The sidewall of the upper buffer plate (10) extends downward and is provided with a chip-blocking edge (7). The end of the chip-blocking edge (7) is bent inward to form a chip-blocking lip (8). An air gap (9) is reserved between the chip-blocking lip (8) and the sidewall of the lower buffer plate (11).

6. The embedded damping composite vibration damping base for machine tools according to claim 1, characterized in that, The bottom surface of the lower buffer plate (11) is provided with an anti-slip buffer pad (12).

7. A machine tool embedded damping composite vibration damping base according to claim 4, characterized in that, The column rib damper (4) is made of polyurethane elastomer or nitrile rubber.

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