Numerical control lathe and cement foundation

Abstract

This utility model provides a CNC lathe and a cement foundation, including a tool holder structure. A spindle structure is located on the inner side of the tool holder structure. The tool holder structure is L-shaped and is located on the same plane as the cement foundation structure. This utility model is rationally designed. By using an isolation trench (≥150mm wide, filled with high-damping material) between the first and second cement foundations, the equipment platform (partial foundation) is decoupled from the surrounding structure. This achieves the following: blocking the vibration transmission path of the workshop floor; external vibration attenuation rate ≥85% (measured in the 0-100Hz frequency band); and the excitation force of the tool holder structure and spindle structure is confined within the areas of the first and second cement foundations respectively, and converted into heat energy through the buffer layer, reducing the vibration acceleration RMS value to below 0.05g.

Description

Technical Field

[0001] This utility model mainly relates to the field of CNC lathes, specifically to a CNC lathe and a cement foundation. Background Technology

[0002] As a core piece of equipment in modern precision manufacturing, the machining accuracy and stability of CNC lathes directly affect the quality of workpieces. Traditional CNC lathes are usually mounted on the workshop floor with a rigid base. However, under conditions such as high-speed cutting and heavy-duty machining, the equipment is prone to resonance due to its own vibration or external interference (such as ground micro-vibrations or the operation of nearby equipment), leading to the following problems:

[0003] Tool wear intensifies, and the surface roughness of the machined surface exceeds the standard (Ra value fluctuation exceeds 30%).

[0004] Decreased repeatability accuracy (typical value > ±10μm);

[0005] The lifespan of key components (spindle, guide rail) is shortened by 20%-40%.

[0006] Furthermore, the foundations of current CNC lathes are generally constructed using conventional concrete (grade C25-C30), which has significant defects:

[0007] Insufficient dynamic stiffness: Ordinary concrete has a damping ratio of only 0.01-0.05, which is insufficient to effectively attenuate vibration energy in the 15-200Hz frequency band;

[0008] Uneven stress distribution: Stress concentration is prone to occur in the area of ​​the equipment anchor bolts, leading to foundation cracking (accuracy loss when cracks are >0.3mm).

[0009] Poor environmental adaptability: Temperature changes (±5℃) or humidity fluctuations (>60%RH) can cause micro-deformation of the foundation, with cumulative settlement error reaching 0.1mm / m.

[0010] It should be noted that the above content falls within the scope of the technical knowledge of the utility model owner. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Utility Model Content

[0011] 1. The technical problem to be solved by the utility model:

[0012] This utility model provides a CNC lathe and a cement foundation to solve the technical problems existing in the background art.

[0013] 2. Technical Solution:

[0014] To achieve the above objectives, the technical solution provided by this utility model is as follows: a CNC lathe, including a tool holder structure, a spindle structure is provided on the inner side of the tool holder structure, the tool holder structure is L-shaped, and the tool holder structure and the cement foundation structure are arranged on the same plane.

[0015] Furthermore, the tool holder structure includes a first base, a guide rail, a movable frame, and a tool holder. The top of the base is provided with a guide rail, and the number of guide rails is set to multiple. The top of the guide rail is slidably connected to the movable frame, and the tool holder is provided on one side of the movable frame.

[0016] Furthermore, the spindle structure includes a second base, a mounting block is provided on the top of the second base, and a spindle is provided at one end of the mounting block.

[0017] A cement foundation, characterized in that it includes:

[0018] A cement foundation structure, the top of which is connected to a tool holder structure and a main shaft structure;

[0019] A cement foundation structure includes a cement base body, a first cement base is provided on one side of the top of the cement base body, and a second cement base is provided on the other side of the top of the cement base body. The first cement base is L-shaped.

[0020] Furthermore, studs are provided on the top of the first cement base and the second cement base, and the studs are connected to the main shaft structure and the tool holder structure.

[0021] Furthermore, a buffer layer is provided on the top of the cement base, and an anti-slip layer is provided on the top of the buffer layer.

[0022] Furthermore, the tops of the first and second cement bases are on the same horizontal plane as the top of the anti-slip layer.

[0023] 3. Beneficial effects:

[0024] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0025] This invention decouples the equipment platform (partial foundation) from the external structure by using a separate first and second cement foundation with an isolation trench (width ≥ 150 mm, filled with high damping material). This achieves the following: blocking the vibration transmission path of the workshop floor, with an external vibration attenuation rate ≥ 85% (measured in the 0-100Hz frequency band); and the excitation force of the tool holder structure and the spindle structure is respectively limited within the areas of the first and second cement foundations, and converted into heat energy through the buffer layer, reducing the vibration acceleration RMS value to below 0.05g. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a three-dimensional structural diagram of the cement foundation structure of this utility model;

[0028] Figure 3 This is a three-dimensional structural diagram of the cement foundation structure of this utility model.

[0029] Figure label:

[0030] 1. Cement foundation structure; 101. Cement foundation body; 102. Buffer layer; 103. First cement base; 104. Second cement base; 105. Stud; 106. Anti-slip layer; 2. Tool holder structure; 3. Main shaft structure. Detailed Implementation

[0031] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example

[0035] See attached document Figure 1-3 A CNC lathe and a cement foundation, comprising a tool holder structure 2, a spindle structure 3 disposed on the inner side of the tool holder structure 2, the tool holder structure 2 being L-shaped, and the tool holder structure 2 and the cement foundation structure 1 being disposed on the same plane.

[0036] Furthermore, the tool holder structure 2 includes a first base, a guide rail, a movable frame, and a tool holder. The top of the base is provided with a guide rail, and the number of guide rails is set to multiple. The movable frame is slidably connected to the top of the guide rail. The tool holder is provided on one side of the movable frame. A servo motor is provided on the top of the first base. A lead screw is provided at the output end of the servo motor. The lead screw is rotatably connected to the first base, and the lead screw has a lead of 10mm and an acceleration of 1.5g, driving the slider at the bottom of the movable frame to move along the linear guide rail. The feed speed is 0-30m / min. A hydraulic locking mechanism is provided between 204 and 203 to achieve a displacement of ±0.1mm. A reinforcing rib is provided at the bending position of the L-shaped base 201 to suppress torsional deformation caused by cutting force. The measured deformation is ≤5μm / 500N·m torque.

[0037] Furthermore, the spindle structure 3 includes a second base, a mounting block is provided on the top of the second base, and a spindle is provided at one end of the mounting block.

[0038] A cement foundation, characterized in that it includes:

[0039] A cement foundation structure 1, the top of which is connected to a tool holder structure 2 and a main shaft structure 3;

[0040] A cement foundation structure 1 includes a cement base body 101. A first cement base 103 is provided on one side of the top of the cement base body 101, and a second cement base 104 is provided on the other side of the top of the cement base body 101. The first cement base 103 is L-shaped. Holes at the bottom of 2 and 3 are inserted into the interior of 105, and then nuts are installed on the top of 105 to fix 2 and 3 to the top of 103 and 104.

[0041] Furthermore, the top of the first cement base 103 and the second cement base 104 are provided with studs 105, which are connected to the main shaft structure 3 and the tool holder structure 2. The top of the cement base body 101 is provided with a buffer layer 102, and the top of the buffer layer 102 is provided with an anti-slip layer 106. The top of the first cement base 103 and the second cement base 104 and the top of the anti-slip layer 106 are located on the same horizontal plane.

[0042] I. Layered Material and Performance Data of Cement Foundation Structure

[0043] 1. Layered material composition

[0044]

[0045] 2. Material-level experimental verification

[0046]

[0047] II. Experimental Data of Split Foundation and CNC Lathe System

[0048] 1. Vibration Suppression Test

[0049] Test conditions: 500 N·m heavy-duty cutting of 45# steel, spindle speed 8,000 rpm

[0050]

[0051] Mechanism explanation:

[0052] The isolation trench of the split foundation is filled with butyl rubber damping material with a loss factor of 0.25 to block the transmission path of external vibration;

[0053] The self-excitation force of the tool holder / spindle is dissipated through the buffer layer (102) to reduce the temperature rise to ≤5℃, thus avoiding resonance.

[0054] 2. Thermal deformation control test

[0055] Test conditions: Ambient temperature fluctuation ±10℃ simulates day-night temperature difference in the workshop.

[0056]

[0057] Mechanism explanation:

[0058] The split base (103, 104) has a built-in temperature sensor and heating wire closed-loop control of ±0.5℃ to compensate for the thermal expansion and contraction of concrete.

[0059] The linear expansion coefficient of the nano-modified epoxy resin in the anti-slip layer (106) is only 8×10⁻ 6 / ℃ Traditional concrete: 12×10⁻ 6 / ℃.

[0060] 3. Accelerated life testing

[0061] Test method: Perform temperature-humidity cycling at 85℃ / 85%RH

[0062]

[0063] III. Verification of Machining Accuracy of Lathe-Foundation System

[0064] Testing Standard: CNC Lathe Accuracy

[0065] Specimen: Ø100mm 304 stainless steel stepped shaft

[0066]

[0067] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A numerically controlled lathe characterized by comprising: include The tool holder structure (2) has a main shaft structure (3) on its inner side. The tool holder structure (2) is L-shaped and is located on the same plane as the cement foundation structure (1).

2. A numerically controlled lathe according to claim 1, characterized in that: The tool holder structure (2) includes a first base, a guide rail, a movable frame and a tool holder. The top of the base is provided with a guide rail, and the number of guide rails is set to multiple. The top of the guide rail is slidably connected to the movable frame, and the tool holder is provided on one side of the movable frame.

3. A numerically controlled lathe according to claim 1, characterized in that: The main shaft structure (3) includes a second base, a mounting block is provided on the top of the second base, and a main shaft is provided at one end of the mounting block.

4. A cement foundation, characterized by: include A cement foundation structure (1), the top of which is connected to a tool holder structure (2) and a main shaft structure (3); A cement foundation structure (1) includes a cement foundation body (101), a first cement base (103) is provided on one side of the top of the cement foundation body (101), and a second cement base (104) is provided on the other side of the top of the cement foundation body (101). The first cement base (103) is L-shaped.

5. A cement foundation according to claim 4, characterised in that: The top of the first cement base (103) and the second cement base (104) are provided with studs (105), which are connected to the main shaft structure (3) and the tool holder structure (2).

6. A cement foundation according to claim 4, characterised in that: A buffer layer (102) is provided on the top of the cement base body (101), and an anti-slip layer (106) is provided on the top of the buffer layer (102).

7. A cement foundation according to claim 6, characterised in that: The tops of the first cement base (103) and the second cement base (104) are on the same horizontal plane as the top of the anti-slip layer (106).

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