Numerical control lathe and cement foundation

Abstract

The invention provides a numerical control lathe and a cement foundation, the numerical control lathe comprises a tool apron structure, a main shaft structure is arranged on the inner side of the tool apron structure, the tool apron structure is L-shaped, and the tool apron structure and the cement foundation structure are arranged on the same plane. The design is reasonable, an equipment bearing platform (a local foundation) and a peripheral structure are decoupled through an isolation groove (the width is larger than or equal to 150 mm, and the isolation groove is filled with a high-damping material) between the first cement foundation and the second cement foundation, and the effects that a workshop ground vibration transmission path is blocked, and the external vibration attenuation rate is larger than or equal to 85% (the actually measured frequency band of 0-100 Hz) can be achieved; the exciting force of the tool apron structure and the exciting force of the main shaft structure are limited in the first cement foundation area and the second cement foundation area respectively and converted into heat energy through the arranged buffer layer, and the vibration acceleration RMS value is reduced to 0.05 g or below.

Description

Technical Field

[0001] The present invention mainly relates to the field of CNC lathes, and in particular to a CNC lathe and a cement foundation. Background Art

[0002] As core equipment in modern precision manufacturing, CNC lathes' machining accuracy and stability directly impact workpiece quality. Traditional CNC lathes are typically mounted on the workshop floor via a rigid base. However, under conditions such as high-speed cutting and heavy-load machining, the equipment is prone to resonance due to its own vibration or external interference (such as ground micro-tremors or the operation of adjacent equipment), leading to the following problems: Tool wear increases, and surface roughness exceeds standards (Ra value fluctuation exceeds 30%). Repeatability accuracy decreases (typical value > ±10μm); The service life of key components (spindle, guide rail) is shortened by 20%-40%.

[0003] In addition, the foundation of current CNC lathes is generally cast with conventional concrete (grade C25-C30), which has significant defects: Insufficient dynamic stiffness: The damping ratio of ordinary concrete is only 0.01-0.05, which is difficult to effectively attenuate vibration energy in the 15-200Hz frequency band; Uneven stress distribution: Stress concentration is likely to occur in the equipment anchor bolt area, causing foundation cracks (accuracy will be lost when the crack is greater than 0.3mm); Poor environmental adaptability: Temperature changes (±5°C) or humidity fluctuations (>60%RH) cause micro-deformation of the foundation, and the cumulative settlement error can reach 0.1mm / m.

[0004] It should be noted that the above content belongs to the technical knowledge scope of the inventor. Since the technical content in this field is vast and too complicated, the above content of this application does not necessarily constitute prior art. Summary of the Invention

[0005] 1. Technical problem to be solved by the invention: The present invention provides a CNC lathe and a cement foundation, which are used to solve the technical problems existing in the above-mentioned background technology.

[0006] 2. Technical solution: To achieve the above-mentioned purpose, the technical solution provided by the present invention is: a CNC lathe, including a tool holder structure, a spindle structure is arranged on the inner side of the tool holder structure, the tool holder structure is arranged in an L shape, and the tool holder structure and the cement foundation structure are arranged in the same plane.

[0007] 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, the number of the 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.

[0008] 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.

[0009] A cement foundation, characterized by comprising: A cement foundation structure, the top of which is connected to the tool holder structure and the main shaft structure; The cement foundation structure comprises a cement foundation body, a first cement base is arranged on one side of the top of the cement foundation body, a second cement base is arranged on the other side of the top of the cement foundation body, and the first cement base is arranged in an L shape.

[0010] 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.

[0011] Furthermore, a buffer layer is provided on the top of the cement floor base body, and an anti-slip layer is provided on the top of the buffer layer.

[0012] Furthermore, the tops of the first cement base and the second cement base are located at the same horizontal plane as the top of the anti-slip layer.

[0013] 3.Beneficial effects: Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention decouples the equipment base (local foundation) from the peripheral structure by using an isolation groove (width ≥ 150 mm, filled with high-damping material) between the separately set first cement foundation and the second cement foundation. This can achieve the following: blocking the vibration transmission path of the workshop floor, and the external vibration attenuation rate ≥ 85% (measured 0-100 Hz frequency band); and the self-excitation forces of the tool holder structure and the spindle structure are respectively confined to the first cement foundation and the second cement foundation area, and are converted into heat energy through the provided buffer layer, and the RMS value of the vibration acceleration is reduced to below 0.05g. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the cement foundation structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the cement foundation structure of the present invention.

[0015] Reference numerals: 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. Spindle structure. DETAILED DESCRIPTION

[0016] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0018] 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 the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0019] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "fixed," "provided with," "provided on," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; they may refer to mechanical connection or electrical connection; they may refer to direct connection or indirect connection through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances. Example

[0020] Refer to the attached Figure 1-3 A CNC lathe and a cement foundation include a tool holder structure 2, a spindle structure 3 is provided on the inner side of the tool holder structure 2, the tool holder structure 2 is arranged in an L shape, and the tool holder structure 2 and the cement foundation structure 1 are arranged in the same plane.

[0021] Furthermore, the tool holder structure 2 includes a first base, a guide rail, a movable frame and a tool holder. A guide rail is provided on the top of the base, and the number of the guide rails is set to multiple. The top of the guide rail is slidably connected to the movable frame, and a tool holder is provided on one side of the movable frame. A servo motor is provided on the top of the first base, and a screw rod is provided at the output end of the servo motor. The screw rod is rotatably connected to the first base, and the lead of the screw rod is 10 mm and the acceleration is 1.5 g, driving the slider at the bottom of the movable frame to move along the linear guide rail with a feed speed of 0-30 m / min. A hydraulic locking mechanism is provided between 204 and 203 to achieve a displacement of ±0.1 mm. A reinforcing rib is provided at the bending position of the L-shaped base 201 to suppress the torsional deformation caused by the cutting force. The measured deformation amount is ≤5 μm / 500 N·m torque.

[0022] 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.

[0023] A cement foundation, characterized by comprising: A cement foundation structure 1, the top of which is connected to a tool holder structure 2 and a spindle structure 3; The 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 set to be L-shaped, and the 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 on the top of 103 and 104.

[0024] Furthermore, studs 105 are provided on the tops of the first cement base 103 and the second cement base 104, and the studs 105 are connected to the main shaft structure 3 and the tool holder structure 2. 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. The tops 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. 1. Cement foundation structure 1 layer material and performance data 1. Layered material composition

[0025] 2. Material-level experimental verification

[0026] 2. Experimental data of split foundation and CNC lathe system 1. Vibration suppression test Test conditions: 500N·m heavy-load cutting of 45# steel, spindle speed 8,000rpm

[0027] Mechanism description: The isolation grooves of the split foundation are filled with butyl rubber damping material with a loss factor of 0.25 to block the external vibration transmission path; The self-excitation force of the tool holder / spindle is dissipated through the buffer layer (102) to reduce the temperature rise to ≤5°C, thus avoiding resonance.

[0028] 2. Thermal deformation control test Test conditions: Ambient temperature fluctuation ±10℃ to simulate the temperature difference between day and night in the workshop

[0029] Mechanism description: The split base (103, 104) has a built-in temperature sensor + heating wire closed-loop control of ±0.5°C to offset the thermal expansion and contraction of concrete; The linear expansion coefficient of the nano-modified epoxy resin of the anti-slip layer (106) is only 8×10⁻ 6 / ℃Traditional concrete: 12×10⁻ 6 / ℃.

[0030] 3. Accelerated life test Test method: Temperature-humidity cycle 85℃ / 85%RH

[0031] 3. Verification of machining accuracy of lathe-foundation system Test standard: CNC lathe accuracy Test piece: Ø100mm304 stainless steel stepped shaft

[0032] The above-mentioned embodiments only express a certain implementation method of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent of the present invention shall be based on the attached claims.

Claims

1. A CNC lathe, characterized in that: include A tool holder structure (2), wherein a main shaft structure (3) is provided on the inner side of the tool holder structure (2), the tool holder structure (2) is arranged in an L-shape, and the tool holder structure (2) and the cement foundation structure (1) are arranged in the same plane.

2. A CNC lathe according to claim 1, characterized in that: The knife seat structure (2) comprises a first base, a guide rail, a movable frame and a knife seat, wherein the top of the base is provided with a guide rail, the number of the guide rails is set to be multiple, the top of the guide rail is slidably connected to the movable frame, and the knife seat is provided on one side of the movable frame.

3. A CNC lathe according to claim 1, characterized in that: The spindle structure (3) comprises 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.

4. A cement foundation, characterized by: include A cement foundation structure (1), wherein the top of the cement foundation structure (1) is connected to the tool holder structure (2) and the main shaft structure (3); A cement foundation structure (1) comprises a cement foundation body (101), wherein 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), wherein the first cement base (103) is arranged in an L shape.

5. The cement foundation according to claim 4, characterized in that: Studs (105) are provided on the tops of the first cement base (103) and the second cement base (104), and the studs (105) are connected to the main shaft structure (3) and the tool holder structure (2).

6. The cement foundation according to claim 1, characterized in that: A buffer layer (102) is provided on the top of the cement floor base body (101), and an anti-slip layer (106) is provided on the top of the buffer layer (102).

7. The cement foundation according to claim 1, characterized in that: The tops of the first cement base (103) and the second cement base (104) are located at the same horizontal plane as the top of the anti-slip layer (106).

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