Quick mounting and dismounting device for power head of numerical control machine tool

Abstract

The utility model discloses a numerical control machine tool power head quick assembly and disassembly device, including spacing structure one and spacing structure two, two constitute integral type structure, wherein, spacing structure one is used for clamping handle fixed structure, including arc installation surface and two parallel installation surfaces, can adapt to cylindrical or square structure, the arc face is equipped with the dowel pin to enhance the fixity. Spacing structure two is vertical flat plate structure, is equipped with spacing groove, and the rotation is limited through with locking nut both sides parallel surface cooperation. The device can realize the synchronous clamping and quick assembly and disassembly of handle and locking nut, and the operation is simple, and the stability is high, possesses general compatibility and high -efficient assembly and disassembly effect, is applicable to multiple models numerical control lathe milling compound machine tool.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, and in particular to a quick loading and unloading device for the power head of a CNC machine tool. Background Technology

[0002] With the widespread application of CNC milling and turning centers in the machining of high-precision parts, the power head, as an important component of the tool changing module, has become a key factor restricting machining efficiency and quality stability in terms of tool loading and unloading efficiency and clamping reliability. Currently, most CNC machine tools still use the traditional double-wrench manual method to install and remove tools from the power head. Although this method is simple in structure and low in cost, it has revealed many obvious shortcomings in the modern manufacturing environment.

[0003] In current operations, two specialized wrenches are typically required to tighten the locking nut of the power head and the cutting head respectively, with the operator applying force in opposite directions with both hands simultaneously to tighten or loosen them. This method is highly dependent on manual arm strength, making it difficult to meet the stringent preload requirements of high-precision machining. Furthermore, the wrenches are prone to slipping during use, posing a potential risk of hand injury to the operator. Especially when operating within the confined space of a machine tool, the operator often needs to twist their body to adjust the angle, increasing the likelihood of accidentally touching rotating parts or causing collisions.

[0004] Furthermore, the large fluctuations in torque output caused by manual operation not only affect the consistency of tool changes but also make it difficult to guarantee the dimensional and positional accuracy during machining, leading to frequent problems such as tool loosening and workpiece dimensional deviations. This issue is particularly serious in the machining of high-value, high-precision parts (such as aerospace components) and may even result in batch scrapping.

[0005] On the other hand, different models of machine tools and power heads have not yet achieved complete standardization in terms of tool interfaces. Many special wrenches are only applicable to specific brands or models and lack universality, which requires companies to keep a large number of non-universal tools, increasing the complexity of equipment management and operation training.

[0006] Therefore, the existing power head tool loading and unloading methods have significant bottlenecks in terms of efficiency, safety, consistency, and versatility. There is an urgent need for a replacement device that is structurally sound, easy to operate, safe, efficient, and compatible to meet the pressing needs of modern manufacturing for rapid tool changing, high reliability, and standardized operations. Utility Model Content

[0007] The purpose of this invention is to provide a quick loading and unloading device for the power head of a CNC machine tool, so as to overcome the technical problems of insufficient torque, inconvenient operation, poor safety, low efficiency and poor compatibility of existing power head tool changing devices.

[0008] This utility model is achieved using the following technical solution: a quick loading and unloading device for a CNC machine tool power head, characterized in that it includes a limiting structure one for limiting and clamping the tool holder fixing structure of the power head; and a limiting structure two for limiting and clamping the locking nut of the power head; the limiting structure one and the limiting structure two form an integrated structure to simultaneously achieve stable clamping of the tool holder fixing structure and the locking nut, preventing relative rotation between the two, thereby significantly simplifying the reverse force action of both hands in traditional tool changing operations, realizing single-wrench disassembly or installation, and improving operational safety and efficiency.

[0009] Furthermore, the limiting structure includes: an arc-shaped mounting surface for conforming to the cylindrical tool holder fixing structure; and two parallel mounting surfaces for clamping the two parallel surfaces of the square tool holder fixing structure to restrict its circumferential rotation. Through the above structural design, this limiting structure can be applied to both axial and radial types of tool holder fixing structures, achieving structural compatibility of the same device and improving versatility and equipment utilization.

[0010] Furthermore, a positioning pin is provided on the inner side of the arc-shaped mounting surface for insertion into the tool holder fixing structure to further restrict its rotation.

[0011] Furthermore, the second limiting structure is a flat plate structure, vertically arranged on the first limiting structure. The second limiting structure has a limiting groove with two parallel inner surfaces that contact the parallel surfaces on both sides of the locking nut to restrict its rotation. By vertically integrating the second limiting structure with the first limiting structure, the entire device can form a stable positioning structure in three-dimensional space, making it particularly suitable for use in the limited space inside a machine tool.

[0012] Furthermore, the opening direction of the limiting groove is the same as the opening direction of the limiting structure one, so that the tool holder fixing structure and the locking nut can be simultaneously inserted into the limiting structure to achieve clamping. This opening alignment design allows the operator to complete the positioning of the two clamping parts simultaneously with only one insertion action during tool changing, significantly shortening the loading and unloading time and improving tool changing efficiency.

[0013] Furthermore, the two parallel mounting surfaces are respectively connected to the two ends of the arc-shaped mounting surface.

[0014] Furthermore, the arc-shaped mounting surface is a semi-circular arc surface.

[0015] The advantages of the quick loading and unloading device for the power head of a CNC machine tool described in this utility model include:

[0016] Through a mechanical locking design with two limiting structures, combined with a torque wrench, this invention can increase the output torque to over 50 N·m, fully meeting the requirements of precision machining for uniform preload. This mechanism meshes with the power head, effectively avoiding tool loosening caused by insufficient manual operating torque, ensuring that the tool's dimensional and positional tolerances (such as cylindricity and coaxiality) are within ±0.005 during machining. It also solves the problem of preload fluctuations caused by operator fatigue or variations in physical strength, ensuring consistent machining performance. This is particularly suitable for the mass production requirements of high-precision, high-value aerospace parts, significantly improving machining quality stability.

[0017] The mechanism engages with the power head, fitting snugly against the locking surface, eliminating the risk of the double wrenches slipping due to lack of anchor. Simultaneously, the simple mechanical mechanism (two hands operating a single wrench) reduces the probability of hand and elbow contact with the machine tool's internal structure. Especially when changing tools in confined machine tool spaces, it avoids the inertial impact caused by slippage due to simultaneous force applied by both hands, preventing injuries such as cuts and fractures. When changing radial power head tools, it avoids the risk of muscle strain and accidental contact with rotating parts caused by the operator contorting their body posture.

[0018] Based on the WTO universal power head used in various milling and turning composite machine tools, the single loading and unloading operation time of 3-5 minutes can be shortened to less than 1 minute, improving efficiency by more than 3 times, while reducing special tools by 50% and significantly reducing equipment management costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a quick loading and unloading device for a CNC machine tool power head;

[0021] Figure 2 A schematic diagram showing the engagement of a quick loading and unloading device for a CNC machine tool power head with an axial power head.

[0022] Figure 3 A schematic diagram showing the engagement of a quick loading and unloading device for a CNC machine tool's power head with a radial power head;

[0023] In the diagram, 1-Limiting structure one, 2-Limiting structure two, 3-Arc-shaped mounting surface, 4-Parallel mounting surface, 5-Limiting groove, 6-Positioning pin, 7-Locking nut, 8-Tool holder fixing structure. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Example

[0026] like Figure 1-3 As shown, this embodiment provides a quick loading and unloading device for a CNC machine tool power head, including two limiting structures. These two limiting structures are integrally connected and respectively realize the clamping of the locking nut 7 of the power head and the tool holder fixing structure 8. The two limiting structures are limiting structure one 1 and limiting structure two 2.

[0027] The limiting structure 1 is used to clamp the tool holder fixing structure 8. The limiting structure 1 includes a semi-circular arc-shaped mounting surface 3 and two parallel mounting surfaces 4 extending from both ends of the arc-shaped mounting surface 3. A positioning pin 6 is provided on the inner side of the arc-shaped mounting surface 3.

[0028] The arc-shaped mounting surface 3 is used to cooperate with the tool holder fixing structure 8 of the axial power head. Since the tool holder fixing structure 8 of the axial power head is cylindrical, the arc-shaped mounting surface 3 can fit its outer surface well. By inserting the positioning pin 6 into the tool holder fixing structure 8 of the axial power head, the circumferential direction of the limiting structure 1 is limited.

[0029] The parallel mounting surface 4 is used to cooperate with the tool holder fixing structure 8 of the radial power head. Since the tool holder fixing structure 8 of the radial power head is square, the rotation of the limiting structure 1 in the circumferential direction can be restricted by clamping it on the parallel surfaces on both sides of the tool holder fixing structure 8 by the two parallel mounting surfaces 4 respectively.

[0030] The second limiting structure 2 is a flat plate structure. This flat plate structure is perpendicular to the arc-shaped mounting surface 3 and the parallel mounting surface 4 of the first limiting structure 1. The second limiting structure 2 is provided with a limiting groove 5. The limiting groove 5 cooperates with the locking nut 7 to fix the locking nut 7. The limiting groove 5 includes two parallel inner surfaces. These two parallel inner surfaces contact the parallel surfaces on both sides of the locking nut 7 to restrict the rotation of the locking nut 7 in the circumferential direction.

[0031] The opening direction of the limiting groove 5 is the same as the opening direction of the arc-shaped mounting surface 3 of the limiting structure 1. When the tool holder fixing structure 8 is inserted into the limiting structure 1, the locking nut 7 is also inserted into the limiting groove 5. Since the limiting structure 1 and the limiting structure 2 are an integral structure, the locking nut 7 and the tool holder fixing structure 8 are fixed through these two limiting structures, so that the locking nut 7 and the tool holder fixing structure 8 will not rotate relative to each other. At this time, the operator only needs to use a wrench to rotate the tool head to disassemble it, avoiding the risks brought about by the traditional method of using two wrenches to apply reverse force to replace the power head tool.

[0032] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A quick loading and unloading device for the power head of a CNC machine tool, characterized in that, It includes a limiting structure one (1) for limiting and clamping the tool holder fixing structure (8) of the power head; and a limiting structure two (2) for limiting and clamping the locking nut (7) of the power head. The limiting structure one (1) and the limiting structure two (2) form an integrated structure to simultaneously achieve stable clamping of the tool holder fixing structure (8) and the locking nut (7) and prevent them from rotating relative to each other.

2. The quick loading and unloading device for the power head of a CNC machine tool according to claim 1, characterized in that, The limiting structure (1) includes: an arc-shaped mounting surface (3) for fitting the cylindrical tool holder fixing structure (8); and two parallel mounting surfaces (4) for clamping the two parallel surfaces of the square tool holder fixing structure (8) to restrict its circumferential rotation.

3. A quick loading and unloading device for the power head of a CNC machine tool according to claim 2, characterized in that, The inner side of the arc-shaped mounting surface (3) is provided with a positioning pin (6) for inserting into the tool holder fixing structure (8) to further restrict its rotation.

4. The quick loading and unloading device for the power head of a CNC machine tool according to claim 1, characterized in that, The second limiting structure (2) is a flat plate structure, which is vertically set on the first limiting structure (1). The second limiting structure (2) is provided with a limiting groove (5). The limiting groove (5) has two parallel inner surfaces that contact the parallel surfaces on both sides of the locking nut (7) to restrict its rotation.

5. A quick loading and unloading device for the power head of a CNC machine tool according to claim 4, characterized in that, The opening direction of the limiting groove (5) is the same as the opening direction of the limiting structure (1) so that the tool holder fixing structure (8) and the locking nut (7) can be inserted into the limiting structure at the same time to achieve clamping.

6. A quick loading and unloading device for the power head of a CNC machine tool according to claim 2, characterized in that, The two parallel mounting surfaces (4) are respectively connected to the two ends of the arc-shaped mounting surface (3).

7. A quick loading and unloading device for the power head of a CNC machine tool according to claim 2, characterized in that, The arc-shaped mounting surface (3) is a semi-circular arc surface.

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