Knife rest structure of numerical control machine tool

Abstract

The utility model relates to the technical field of numerically-controlled machine tools, and discloses a tool rest structure of a numerically-controlled machine tool, which comprises a tool fixing part, a body and a fixing bottom plate which are arranged from top to bottom, a plurality of tool guide rails are formed on the upper end face of the tool fixing part, and the tool guide rails are used for assembling tools; receding grooves are formed in the two opposite faces of the body correspondingly, and a weight reduction cavity is formed in the body; the fixing bottom plate is provided with two connecting holes communicating with the two receding grooves in a one-to-one correspondence mode, and the connecting holes are used for installing bolts to be screwed in. The material consumption is less, the cost is lower, and the structural stability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machine tools, in particular to a tool rest structure of a numerical control machine tool. Background Art

[0002] With the rapid development of the economic structure, the development of the numerical control machine tool industry is moving towards high precision, high efficiency, high speed and intelligence. As one of the important indicators to measure the machining performance of a machine tool, the machine tool accuracy directly affects the accuracy and performance of the machined parts. Multi-axis, compound and high-speed have become important trends in the development of numerical control lathes at home and abroad. It can not only expand the use range of the machine tool, improve the use efficiency of the machine tool, but also meet the process machining requirements of multi-purpose and multi-functional. The double-spindle lathe can effectively meet the machining of materials with different shapes during machining, and has a very wide application range. At present, it has been applied to the machining of parts in the automotive industry, the mold manufacturing in the machinery manufacturing industry, the manufacturing of aerospace products, electro-optics, instrumentation, medical devices, electronic communications, etc. At present, the weak link in many double-spindle lathes is the tool rest. As Figure 1 shown, the existing tool rest structure 1' uses more materials and has poor stability, which affects the overall working efficiency and stability of the spindle lathe in actual application and restricts the development of the machinery manufacturing industry. In the existing technology, there are few optimizations for the structure and size of the tool rest.

[0003] Therefore, there is an urgent need for a tool rest structure of a numerical control machine tool to solve the above technical problems. Summary of the Utility Model

[0004] Based on the above, the purpose of the utility model is to provide a tool rest structure of a numerical control machine tool, which uses less materials, has a lower cost and better structural stability.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A tool rest structure of a numerical control machine tool includes a tool fixing part, a body and a fixed bottom plate arranged from top to bottom;

[0007] A plurality of tool guides are formed on the upper end surface of the tool fixing part, and the tool guides are used for assembling tools;

[0008] Avoidance grooves are respectively arranged on two opposite surfaces of the body, and a weight reduction cavity is formed in the body;

[0009] Two connection holes respectively corresponding to and communicating with the two avoidance grooves are arranged on the fixed bottom plate, and the connection holes are used for screwing in mounting bolts.

[0010] As a preferred solution for the tool rest structure of a numerically controlled machine tool, one side wall of the avoidance groove close to the tool fixing part forms an avoidance inclined surface, and the avoidance inclined surface slopes downward along the direction from outside to inside.

[0011] As a preferred solution for the tool rest structure of a numerically controlled machine tool, the body includes two side plates arranged oppositely and two end plates arranged between the two side plates. An intermediate body is also connected between the two side plates. The intermediate body is spaced between the two end plates, and first grooves are respectively formed on two surfaces of the intermediate body close to the two side plates. Each of the two side plates is provided with a through hole, and each through hole communicates with one of the first grooves to form one of the avoidance grooves.

[0012] As a preferred solution for the tool rest structure of a numerically controlled machine tool, the tool fixing part, the body and the fixing base plate are integrally cast. Two first process holes communicating with the weight reduction cavity are formed on the fixing base plate, and the connection hole is located between the two first process holes.

[0013] As a preferred solution for the tool rest structure of a numerically controlled machine tool, a support plate is also connected between the two side plates. Two ends of the support plate are respectively connected to the intermediate body and the tool fixing part, and a second process hole is formed on the support plate.

[0014] As a preferred solution for the tool rest structure of a numerically controlled machine tool, both sides of the tool fixing part protrude outwards from the planes where both sides of the body are located and extend outwards. At least one reinforcing block is connected between the outer wall of each side plate and the lower end surface of the tool fixing part.

[0015] As a preferred solution for the tool rest structure of a numerically controlled machine tool, one end of each side plate close to the tool fixing part forms an L-shaped groove, the notch of the L-shaped groove faces outwards, and the reinforcing block is connected in the L-shaped groove.

[0016] As a preferred solution for the tool rest structure of a numerically controlled machine tool, the upper end surface of the reinforcing block fits the lower end surface of the tool fixing part, the lower end surface of the reinforcing block fits one side wall of the L-shaped groove, the inner side surface of the reinforcing block fits the other side wall of the L-shaped groove, and the outer side surface of the reinforcing block forms a reinforcing inclined surface, and the reinforcing inclined surface slopes inwards from top to bottom.

[0017] As a preferred solution for the tool rest structure of a numerically controlled machine tool, both ends of the fixing base plate protrude outwards from the planes where the two end plates are located and extend outwards.

[0018] As a preferred solution for the tool rest structure of a numerically controlled machine tool, fixing holes are arranged on the part of the fixing base plate protruding from the plane where the end plate is located.

[0019] The beneficial effects of the present utility model are:

[0020] The present utility model provides a tool rest structure for a numerical control machine tool. The tool rest structure of the numerical control machine tool includes a tool fixing part, a main body, and a fixed base plate. By forming a weight-reducing cavity in the main body, the overall weight of the tool rest structure is relatively light, which is beneficial to cost savings. At the same time, by providing an avoidance groove and a connection hole, it is convenient to fix the tool rest structure through mounting bolts, and the avoidance groove provides an installation space for the mounting bolts. Compared with the existing tool rest structure, the tool rest structure of the numerical control machine tool has better stability and lower cost. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.

[0022] Figure 1 is a schematic structural diagram of an existing tool rest structure in the prior art;

[0023] Figure 2 is a schematic structural diagram of the tool rest structure provided in this embodiment from one perspective;

[0024] Figure 3 is a schematic structural diagram of the tool rest structure provided in this embodiment from another perspective;

[0025] Figure 4 is a cross-sectional view of the tool rest structure provided in this embodiment from one perspective;

[0026] Figure 5 is a cross-section of the tool rest structure provided in this embodiment from another perspective Figure 1 ;

[0027] Figure 6 is a cross-section of the tool rest structure provided in this embodiment from another perspective Figure 2 ;

[0028] Figure 7 is a cross-sectional view of the tool rest structure provided in this embodiment from yet another perspective.

[0029] In the figure:

[0030] 1', existing tool rest structure;

[0031] 1. Tool fixing part; 11. Tool guide rail; 2. Body; 20. Avoidance groove; 201. Avoidance inclined plane; 200. Weight reduction cavity; 21. Side plate; 210. Through hole; 2100. L-shaped groove; 22. End plate; 23. Intermediate body; 230. First groove; 24. Support plate; 240. Second process hole; 3. Fixed bottom plate; 30. First process hole; 300. Connection hole; 4. Reinforcing block; 50. Fixing hole. Detailed implementation manners

[0032] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only parts related to the present utility model are shown in the drawings, rather than all structures.

[0033] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0034] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above and over", and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below and under", and "under the bottom of" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0035] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "left", and "right" are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation to the present utility model. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality of" is two or more. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0036] As Figures 1 to 7As shown, this embodiment provides a tool holder structure for a CNC machine tool. The tool holder structure of the CNC machine tool includes a tool fixing portion 1, a main body 2, and a fixed base plate 3 arranged from top to bottom. The upper end surface of the tool fixing portion 1 is formed with a plurality of tool guide rails 11, which are used to assemble tools. The main body 2 is provided with avoidance grooves 20 on two opposite sides, and a weight-reducing cavity 200 is formed in the main body 2. The fixed base plate 3 is provided with two connecting holes 300 that correspond to the two avoidance grooves 20, respectively, and the connecting holes 300 are used to screw in mounting bolts. Among them, the upper end surface of the tool fixing portion 1 refers to the end surface of the tool fixing portion 1 facing away from the main body 2. A plurality of tool rails are arranged at intervals along the width direction of the tool fixing portion 1, for example, 4 or 5 tool rails are provided, and the specific arrangement depends on actual needs. The weight-reducing cavity 200 formed within the body 2 makes the tool holder structure lightweight and reduces costs. Furthermore, the provision of the relief groove 20 and connecting hole 300 facilitates bolt fastening of the tool holder structure. During assembly, the bolts are threaded through the relief groove 20 into the connecting hole 300 and then into the CNC machine tool body. The relief groove 20 provides space for the bolts. Compared to existing tool holder structures, this CNC machine tool tool holder structure offers greater stability and lower costs.

[0037] like Figure 6 As shown, preferably, a side wall of the avoidance groove 20 near the tool fixing portion 1 forms an avoidance slope 201, which slopes downward from the outside to the inside. The inclination of the side wall of the avoidance groove 20 aligns with the screwing direction of the mounting bolt, thereby minimizing interference with the mounting bolt during installation and maximizing the space of the weight-reducing cavity 200 within the body 2.

[0038] like Figures 2 to 7 As shown, specifically, the body 2 includes two side panels 21 arranged opposite to each other and two end panels 22 arranged between the two side panels 21. The two end panels 22 between the two side panels 21 surround the peripheral wall of the body 2, and the peripheral wall is located between the fixed base plate 3 and the tool fixing portion 1. An intermediate body 23 is also connected between the two side panels 21. The intermediate body 23 is spaced between the two end panels 22, and the two sides of the intermediate body 23 near the two side panels 21 are respectively provided with a first groove 230. The two side panels 21 are respectively provided with a through hole 210, and each through hole 210 is connected to a first groove 230 to form an avoidance groove 20. That is, the two side panels 21 and the two end panels 22 surround the peripheral wall of the body 2, that is, the body 2 is hollow. Under the above structure, the body 2 uses less material, is lighter in weight, and has better stability. The first groove 230 on the intermediate body 23 provides avoidance space and can ensure the stability of the body 2 structure.

[0039] More specifically, the tool fixing part 1, the body 2 and the fixing base plate 3 are integrally cast. Two first process holes 30 communicating with the weight reduction cavity 200 are formed in the fixing base plate 3, and the connecting hole 300 is located between the two first process holes 30. The integral molding of the tool fixing part 1, the body 2 and the fixing base plate 3 results in a relatively high overall structural strength and better stability of the tool rest structure, and it is also easy to process. The arrangement of the first process holes 30 is suitable for the casting process and facilitates the formation of the weight reduction cavity 200.

[0040] In this embodiment, a support plate 24 is further connected between the two side plates 21. The two ends of the support plate 24 are respectively connected to the intermediate body 23 and the tool fixing part 1, and a second process hole 240 is formed in the support plate 24. That is, the support plate 24 is supported between the lower end faces of the intermediate body 23 and the tool fixing part 1 to ensure the overall structural strength and stability of the tool rest structure, and to prevent the tool fixing part 1 from sagging or the body 2 from deforming, etc. Preferably, the two sides of the support plate 24 are connected to the two side plates 21 of the body 2. The intermediate body 23 and the support plate 24 divide the weight reduction cavity 200 into two cavities. To ensure the smooth progress of casting, the second process hole 240 is provided on the support plate 24, so that the tool rest structure can be successfully formed during casting.

[0041] Furthermore, as Figure 2 and Figure 5 shown, both sides of the tool fixing part 1 protrude outward from the plane where both sides of the body 2 are located. At least one reinforcing block 4 is connected between the outer wall of each side plate 21 and the lower end face of the tool fixing part 1. By the outward extension of both sides of the tool fixing part , the upper end face area of the tool fixing part 1 is relatively large, so that more tool tracks can be set, that is, multiple tools can be loaded simultaneously, which is beneficial to improving the processing efficiency. At the same time, by providing the reinforcing block 4, sufficient support is provided for the tool fixing part 1, enabling the tool fixing part 1 to carry more tools and ensuring the stability of tool processing. Exemplarily, when the tool fixing part 1 has the same width as the body 2, 3 tool tracks can be set. By outward extension and providing the reinforcing block 4, 4 or 5 tool tracks can be set.

[0042] Specifically, an L-shaped groove 2100 is formed at one end of each side plate 21 close to the tool fixing part 1. The notch of the L-shaped groove 2100 faces outward, and the reinforcing block 4 is connected in the L-shaped groove 2100. The arrangement of the L-shaped groove 2100 further improves the structural strengthening effect of the reinforcing block 4 on the tool fixing part 1, that is, the lower end of the reinforcing block 4 abuts against the groove wall of the L-shaped groove 2100, reducing the possibility of deformation of the reinforcing block 4.

[0043] In this embodiment, the upper end surface of the reinforcing block 4 fits the lower end surface of the tool fixing part 1, the lower end surface of the reinforcing block 4 fits one side wall of the L-shaped groove 2100, the inner side surface of the reinforcing block 4 fits the other side wall of the L-shaped groove 2100, and the outer side surface of the reinforcing block 4 forms a reinforcing inclined surface which inclines inwards from top to bottom. When the tool fixing part 1 is stressed, the part of the tool fixing part 1 extending out of the plane where the main body 2 is located is supported by the reinforcing block 4, avoiding large vibration deformation. Moreover, the reinforcing block 4 has good load-bearing performance under the support of the L-shaped groove 2100, so that the overall stability of the tool rest structure is better, which is beneficial to improving the machining accuracy and reliability of the CNC machine tool.

[0044] Furthermore, as Figure 2 and Figure 3 shown, both ends of the fixed bottom plate 3 respectively protrude and extend outwards from the plane where the two end plates 22 are located, increasing the bottom area of the fixed bottom plate 3, that is, increasing the connection area between the fixed bottom plate 3 and the CNC machine tool body 2, thereby improving the stability of the tool structure. Preferably, the part of the fixed bottom plate 3 protruding from the plane where the end plate 22 is located is provided with fixing holes 50. The fixing holes 50 are used for screwing in bolts. That is, when installing this tool rest structure, multiple installation bolts are used for fixing. Among them, multiple installation bolts are respectively screwed into multiple fixing holes 50, and multiple installation bolts are respectively screwed into multiple connection holes 300, further strengthening the stability of the tool rest structure, thereby improving the overall machining accuracy and reliability of the CNC machine tool.

[0045] In order to verify the stability of this tool rest structure, using finite element analysis software, a finite element model of the existing tool rest structure and a finite element model of the tool rest structure provided in this embodiment are established. Through numerical simulation and analysis, taking the first-order frequency, maximum deformation and mass of the tool rest structure as the measurement criteria, the performance comparison results of the existing tool rest structure and the tool rest structure provided in this embodiment are as follows:

[0046]

[0047] As can be seen from the above table, the first-order frequency is increased from 381.33 Hz to 508.98 Hz, an increase of 36.33%, the maximum deformation is reduced from 0.0028 mm to 0.0017 mm, a reduction of 39.28%, and the mass is reduced by 17.13% on the original basis. It can be seen that the tool rest structure provided in this embodiment has good stability and structural strength, and at the same time, the manufacturing cost is relatively low.

[0048] Note that the above is only the preferred embodiment of the present utility model and the applied technical principles. Those skilled in the art will understand that the present utility model is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present utility model. Therefore, although the present utility model has been described in more detail through the above embodiments, the present utility model is not limited to the above embodiments only. Without departing from the concept of the present utility model, more other equivalent embodiments can be included, and the scope of the present utility model is determined by the scope of the appended claims.

Claims

1. A tool rest structure of a numerical control machine tool, characterized in that, It includes a tool fixing part, a body, and a fixing base plate arranged from top to bottom; Several tool guide rails are formed on the upper end surface of the tool fixing part, and the tool guide rails are used for assembling tools; Avoidance grooves are respectively arranged on two opposite sides of the body, and a weight reduction cavity is formed inside the body; Two connection holes corresponding to and communicating with the two avoidance grooves respectively are arranged on the fixing base plate, and the connection holes are used for screwing in mounting bolts.

2. The tool rest structure of a CNC machine tool according to claim 1, wherein: An avoidance inclined surface is formed on the side wall of the avoidance groove close to the tool fixing part, and the avoidance inclined surface slopes downward along the direction from outside to inside.

3. The tool rest structure of the numerical control machine tool according to claim 1, characterized in that, The body includes two side plates arranged oppositely and two end plates arranged between the two side plates. An intermediate body is also connected between the two side plates. The intermediate body is spaced between the two end plates, and first grooves are respectively opened on two sides of the intermediate body close to the two side plates. One through hole is respectively opened on each of the two side plates, and each through hole communicates with one of the first grooves to form one of the avoidance grooves.

4. The tool rest structure of the numerical control machine tool according to claim 3, characterized in that, The tool fixing part, the body, and the fixing base plate are integrally formed by casting. Two first process holes communicating with the weight reduction cavity are opened on the fixing base plate, and the connection holes are located between the two first process holes.

5. The tool rest structure of a CNC machine tool according to claim 4, characterized in that: A support plate is also connected between the two side plates. Two ends of the support plate are respectively connected to the intermediate body and the tool fixing part, and a second process hole is opened on the support plate.

6. The tool rest structure of a CNC machine tool according to claim 3, characterized in that: Both sides of the tool fixing part protrude outward beyond the planes where both sides of the body are located. At least one reinforcing block is connected between the outer wall of each side plate and the lower end surface of the tool fixing part.

7. The tool rest structure of the numerical control machine tool according to claim 6, characterized in that, An L-shaped groove is formed at one end of each side plate close to the tool fixing part, and the notch of the L-shaped groove faces outward. The reinforcing block is connected in the L-shaped groove.

8. The tool rest structure of a CNC machine tool according to claim 7, characterized in that: The upper end surface of the reinforcing block fits the lower end surface of the tool fixing part, the lower end surface of the reinforcing block fits one side wall of the L-shaped groove, the inner side surface of the reinforcing block fits the other side wall of the L-shaped groove, and a reinforcing inclined surface is formed on the outer side surface of the reinforcing block, and the reinforcing inclined surface slopes inward from top to bottom.

9. The tool rest structure of the numerical control machine tool according to claim 3, characterized in that, Both ends of the fixing base plate protrude outward beyond the planes where the two end plates are located.

10. The tool rest structure of the numerical control machine tool according to claim 9, characterized in that, Fixing holes are arranged on the part of the fixing base plate protruding beyond the plane where the end plates are located.

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