Testing device for servo system of numerical control machine tool

Abstract

The utility model relates to the technical field of numerically-controlled machine tools, in particular to a numerically-controlled machine tool servo system testing device, which comprises horizontal iron, a mounting plate is mounted at the top end of the horizontal iron, a power servo tool rest base is fixed at the top end of the mounting plate, and a lifting cylinder is mounted at the top end of the power servo tool rest base in a sliding manner. A power servo tool rest base plate is fixed to the top end of the lifting cylinder. The beneficial effects of the utility model are that when the power servo tool rest is tested, the height of the lifting cylinder and the power servo tool rest can be adjusted through the lifting of the hydraulic telescopic rod, so that the power servo tool rest can be flexibly and fully tested; the power servo tool rest is mounted on the horizontal iron, and the two ends of the mounting plate and the two sides of the horizontal iron are fastened, mounted and connected through the connecting plates and the bolts, so that the mounting stability of the power servo tool rest in a test can be kept, and the power servo tool rest is convenient to disassemble and mount.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, and in particular to a test device for a CNC machine tool servo system. Background Technology

[0002] CNC machine tools are widely used in the machinery manufacturing industry, using CNC programs to control servo motors to drive the tool holder and process parts of various shapes. The reliability of CNC machine tools has a significant impact on the accuracy and efficiency of the processed parts, and the servo system is an important component of CNC machine tools; therefore, ensuring the reliability of the servo system is crucial.

[0003] In the process of researching the reliability of CNC machine tools, it is usually necessary to collect fault data and then calculate the mean time between failures (MTBF) as a reliability indicator. When designing CNC machine tools, to improve the overall reliability, it is necessary to select highly reliable components. To understand the reliability level of these components, reliability tests are required.

[0004] One of the main reasons for the low reliability of domestically produced CNC machine tools is the low reliability of key functional components. As one of the key functional components of CNC lathes, the reliability of the tool post itself plays a crucial role in the overall reliability of the CNC lathe.

[0005] With the development of automation, tool turret designs are increasingly trending towards designs with integrated power heads for integrated turning, milling, and drilling machining. During the machining process, the power servo tool turret power head directly participates in workpiece machining. Throughout the machining process, the power servo tool turret power head directly bears the excitation of external loads, and its dynamic characteristics directly affect the overall dynamic performance of the machine tool. As a directly involved component in CNC machining, the fatigue strength characteristics of the power servo tool turret power head and the degradation of its accuracy during use will obviously affect the overall reliability of the machine tool.

[0006] For example, the prior art Chinese patent publication number "CN03728920 A" provides a reliability testing device for a CNC machine tool servo system, including a mechanical structure system and an electrical control system; the implementation method of the testing device includes a method for controlling the speed, acceleration, displacement, and reverse torque of the servo motor driving the slider; the device can simulate various working conditions of a CNC machine tool, with the servo system driving the slider to run different displacements at different speeds and accelerations under different reverse torques, recording fault data during operation, and using this data to calculate and evaluate the reliability level of the CNC machine tool servo system.

[0007] This device can be used to evaluate the reliability level of servo systems during the reliability design of CNC machine tools, and it has good application prospects.

[0008] Existing CNC machine tool servo system testing devices have a relatively fixed installation height for the power servo tool post. This makes it inconvenient to adjust the height of the power servo tool post for thorough testing. In addition, the power servo tool post needs to be stably mounted on a horizontal iron during testing, but the installation between the power servo tool post and the horizontal iron is not stable enough, and disassembly and installation are not convenient and quick enough. Utility Model Content

[0009] The purpose of this invention is to address the shortcomings of existing technologies where the installation height of the power servo tool post is relatively fixed, making it inconvenient to adjust the height of the power servo tool post for thorough testing. Therefore, this invention proposes a testing device for CNC machine tool servo systems.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] Design a test device for a CNC machine tool servo system, including a ground level, a mounting plate installed on the top of the ground level, a power servo tool post base fixed on the top of the mounting plate, a lifting cylinder slidably installed on the top of the power servo tool post base, a power servo tool post pad fixed on the top of the lifting cylinder, a power servo tool post mounted on the top of the power servo tool post pad, a lifting groove provided inside the power servo tool post base, a hydraulic telescopic rod provided in the middle of the lifting groove, guide grooves opened on both sides of the lifting groove, a first connecting hole opened at the top of the guide groove, a groove provided inside the lifting cylinder, the top of the hydraulic telescopic rod being fixedly connected to the top of the groove, guide blocks fixed on both sides of the bottom of the lifting cylinder, a guide rod fixed between the top of the guide block and the bottom of the power servo tool post pad, the guide rod slidingly passing through the first connecting hole, and a first nut connected to the surface of the guide rod at the upper and lower ends of the first connecting hole.

[0012] Furthermore, the top surface of the ground rail has a snap-fit ​​groove, the surface of the mounting plate has a second connecting hole, a connecting rod passes through the inside of the second connecting hole, a second nut is connected to the surface of the connecting rod at the top of the second connecting hole, the bottom end of the connecting rod has a snap-fit ​​block, the snap-fit ​​block slides through the snap-fit ​​groove, the ground rail has a third connecting hole on both sides, the mounting plate has a connecting plate fixed on both sides, the surface of the connecting plate has a fourth connecting hole, and bolts are inserted into the fourth connecting hole and the third connecting hole.

[0013] Furthermore, the ground rail is horizontally positioned, the mounting plate is a rectangular plate structure and is horizontally positioned, the power servo tool holder base is a rectangular frame structure, and the lifting cylinder is a rectangular cylinder structure and is vertically positioned.

[0014] Furthermore, the power servo tool holder pad is a rectangular plate structure and is horizontally arranged; the lifting groove is a rectangular groove structure; the hydraulic telescopic rod is vertically arranged; and the guide groove is a rectangular groove structure and is vertically arranged.

[0015] Furthermore, the groove is a rectangular groove structure, the guide block is a rectangular block structure and is horizontally inserted into the guide groove, and the guide rod is a threaded rod structure and is vertically arranged.

[0016] Furthermore, both the snap-fit ​​groove and the snap-fit ​​block have T-shaped cross-sections and are horizontally arranged, while the connecting rod is a threaded rod structure and is vertically arranged.

[0017] Furthermore, the connecting plate has an L-shaped structure and is vertically arranged on the outside; the third connecting hole has a threaded hole structure; the fourth connecting hole is horizontally aligned with the third connecting hole; and the bolt is horizontally arranged.

[0018] The experimental device for CNC machine tool servo system proposed in this utility model has the following advantages:

[0019] 1. This utility model features a lifting groove inside the power servo tool holder base, with a hydraulic telescopic rod installed in the lifting groove. The bottom end of the lifting cylinder is slidably inserted into the lifting groove and fixedly connected to the hydraulic telescopic rod. Simultaneously, the guide rod and guide block on the side of the lifting cylinder are adjustablely connected to the power servo tool holder base via the guide groove and the first connecting hole. Thus, when testing the power servo tool holder, the height of the lifting cylinder and the power servo tool holder can be adjusted by raising and lowering the hydraulic telescopic rod, facilitating flexible and thorough testing of the power servo tool holder.

[0020] 2. In this utility model, the mounting plate is fixed to the bottom of the power servo tool holder base at the top of the ground leveling iron. The mounting plate is fastened to the surface of the ground leveling iron through the connecting rod and the snap-fit ​​block. The power servo tool holder is installed on the ground leveling iron. The two ends of the mounting plate are fastened to the two sides of the ground leveling iron through the connecting plate and bolts. In this way, the installation stability of the power servo tool holder during testing can be maintained, and disassembly and installation can be convenient. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This utility model Figure 1 A schematic diagram of the power servo tool holder base and lifting cylinder;

[0023] Figure 3 This utility model Figure 1 A schematic diagram of the card-connecting block;

[0024] Figure 4 This utility model Figure 1 A schematic diagram of the mounting plate and the power servo tool holder base;

[0025] Figure 5 This utility model Figure 1 A schematic diagram of the lifting cylinder and guide rod.

[0026] In the diagram: 1. Ground leveling iron; 2. Snap-fit ​​groove; 3. Third connecting hole; 4. Mounting plate; 5. Connecting plate; 6. Bolt; 7. Power servo tool holder base; 8. Guide groove; 9. Guide rod; 10. Power servo tool holder; 11. Power servo tool holder pad; 12. Lifting cylinder; 13. Guide block; 14. Snap-fit ​​block; 15. Fourth connecting hole; 16. Connecting rod; 17. Second nut; 18. Second connecting hole; 19. Hydraulic telescopic rod; 20. Lifting groove; 21. First connecting hole; 22. Groove; 23. First nut. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Example 1

[0029] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The diagram shows a test device for a CNC machine tool servo system, including a ground level 1. A mounting plate 4 is installed on the top of the ground level 1. A power servo tool post base 7 is fixed to the top of the mounting plate 4. A lifting cylinder 12 is slidably installed on the top of the power servo tool post base 7. A power servo tool post pad 11 is fixed to the top of the lifting cylinder 12. A power servo tool post 10 is installed on the top of the power servo tool post pad 11. A lifting groove 20 is provided inside the power servo tool post base 7. A hydraulic telescopic rod 19 is provided in the middle of the lifting groove 20.

[0030] The lifting groove 20 has guide grooves 8 on both sides, and a first connecting hole 21 is opened at the top of the guide groove 8. The lifting cylinder 12 has a groove 22 inside. The top of the hydraulic telescopic rod 19 is fixedly connected to the top of the groove 22 inside. Guide blocks 13 are fixed at the bottom of both sides of the lifting cylinder 12. A guide rod 9 is fixed between the top of the guide block 13 and the bottom of the power servo tool holder pad 11. The guide rod 9 slides through the first connecting hole 21. A first nut 23 is connected to the surface of the guide rod 9 at the upper and lower ends of the first connecting hole 21.

[0031] A lifting groove 20 is provided inside the power servo tool holder base 7, and a hydraulic telescopic rod 19 is installed in the lifting groove 20. The bottom end of the lifting cylinder 12 is slidably inserted into the lifting groove 20 and fixedly connected to the hydraulic telescopic rod 19. At the same time, the guide rod 9 and guide block 13 on the side of the lifting cylinder 12 are adjustablely connected to the power servo tool holder base 7 through the guide groove 8 and the first connecting hole 21. Thus, when testing the power servo tool holder 10, the height of the lifting cylinder 12 and the power servo tool holder 10 can be adjusted by lifting and lowering the hydraulic telescopic rod 19 to facilitate flexible and sufficient testing of the power servo tool holder 10.

[0032] The ground rail 1 is horizontally positioned, the mounting plate 4 is a rectangular plate structure and is horizontally positioned, the power servo tool holder base 7 is a rectangular frame structure, and the lifting cylinder 12 is a rectangular cylinder structure and is vertically positioned.

[0033] The power servo tool holder pad 11 is a rectangular plate structure and is set horizontally. The lifting groove 20 is a rectangular groove structure. The hydraulic telescopic rod 19 is set vertically. The guide groove 8 is a rectangular groove structure and is set vertically.

[0034] The groove 22 is a rectangular groove structure, the guide block 13 is a rectangular block structure and is horizontally inserted into the guide groove 8, and the guide rod 9 is a threaded rod structure and is vertically arranged.

[0035] Example 2

[0036] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5The diagram shows a test device for a CNC machine tool servo system, including a ground level 1. A mounting plate 4 is installed on the top of the ground level 1. A power servo tool post base 7 is fixed to the top of the mounting plate 4. A lifting cylinder 12 is slidably installed on the top of the power servo tool post base 7. A power servo tool post pad 11 is fixed to the top of the lifting cylinder 12. A power servo tool post 10 is installed on the top of the power servo tool post pad 11. A lifting groove 20 is provided inside the power servo tool post base 7. A hydraulic telescopic rod 19 is provided in the middle of the lifting groove 20.

[0037] The lifting groove 20 has guide grooves 8 on both sides, and a first connecting hole 21 is opened at the top of the guide groove 8. The lifting cylinder 12 has a groove 22 inside. The top of the hydraulic telescopic rod 19 is fixedly connected to the top of the groove 22 inside. Guide blocks 13 are fixed at the bottom of both sides of the lifting cylinder 12. A guide rod 9 is fixed between the top of the guide block 13 and the bottom of the power servo tool holder pad 11. The guide rod 9 slides through the first connecting hole 21. A first nut 23 is connected to the surface of the guide rod 9 at the upper and lower ends of the first connecting hole 21.

[0038] A lifting groove 20 is provided inside the power servo tool holder base 7, and a hydraulic telescopic rod 19 is installed in the lifting groove 20. The bottom end of the lifting cylinder 12 is slidably inserted into the lifting groove 20 and fixedly connected to the hydraulic telescopic rod 19. At the same time, the guide rod 9 and guide block 13 on the side of the lifting cylinder 12 are adjustablely connected to the power servo tool holder base 7 through the guide groove 8 and the first connecting hole 21. Thus, when testing the power servo tool holder 10, the height of the lifting cylinder 12 and the power servo tool holder 10 can be adjusted by lifting and lowering the hydraulic telescopic rod 19 to facilitate flexible and sufficient testing of the power servo tool holder 10.

[0039] The top surface of the ground leveling iron 1 has a snap-fit ​​groove 2, and the surface of the mounting plate 4 has a second connecting hole 18. A connecting rod 16 passes through the inside of the second connecting hole 18. A second nut 17 is connected to the surface of the connecting rod 16 at the top of the second connecting hole 18. A snap-fit ​​block 14 is located at the bottom of the connecting rod 16. The snap-fit ​​block 14 slides through the snap-fit ​​groove 2. The two sides of the ground leveling iron 1 have third connecting holes 3. The two sides of the mounting plate 4 are fixed with connecting plates 5. The surface of the connecting plates 5 has a fourth connecting hole 15. Bolts 6 are inserted into the inside of the fourth connecting hole 15 and the third connecting hole 3.

[0040] At the top of the ground level 1, the mounting plate 4 is fixed to the bottom of the power servo tool holder base 7. The mounting plate 4 is fastened to the snap-fit ​​groove 2 on the surface of the ground level 1 through the connecting rod 16 and the snap-fit ​​block 14. The power servo tool holder 10 is installed on the ground level 1. The two ends of the mounting plate 4 are fastened to the two sides of the ground level 1 through the connecting plate 5 and the bolts 6. In this way, the installation stability of the power servo tool holder 10 during the test can be maintained and the disassembly and installation can be convenient.

[0041] Both the snap-fit ​​groove 2 and the snap-fit ​​block 14 have T-shaped cross-sections and are horizontally arranged. The connecting rod 16 is a threaded rod structure and is vertically arranged.

[0042] The connecting plate 5 has an L-shaped structure and is vertically arranged on the outside. The third connecting hole 3 is a threaded hole structure. The fourth connecting hole 15 is horizontally aligned with the third connecting hole 3. The bolt 6 is horizontally arranged.

[0043] Working method: A lifting groove 20 is set inside the power servo tool holder base 7, and a hydraulic telescopic rod 19 is installed in the lifting groove 20. The bottom end of the lifting cylinder 12 is slidably inserted into the lifting groove 20 and fixedly connected to the hydraulic telescopic rod 19. At the same time, the guide rod 9 and guide block 13 on the side of the lifting cylinder 12 are adjustablely connected to the power servo tool holder base 7 through the guide groove 8 and the first connecting hole 21. In this way, when testing the power servo tool holder 10, the height of the lifting cylinder 12 and the power servo tool holder 10 can be adjusted by lifting and lowering the hydraulic telescopic rod 19, so as to flexibly and fully test the power servo tool holder 10.

[0044] At the top of the ground level 1, the mounting plate 4 is fixed to the bottom of the power servo tool holder base 7. The mounting plate 4 is fastened to the snap-fit ​​groove 2 on the surface of the ground level 1 through the connecting rod 16 and the snap-fit ​​block 14. The power servo tool holder 10 is installed on the ground level 1. The two ends of the mounting plate 4 are fastened to the two sides of the ground level 1 through the connecting plate 5 and the bolts 6. In this way, the installation stability of the power servo tool holder 10 during the test can be maintained and the disassembly and installation can be convenient.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A testing device for a servo system of a numerically controlled machine tool comprising a ground iron (1), characterized in that: The top end of the ground level iron (1) is provided with a mounting plate (4), the top end of the mounting plate (4) is fixedly provided with a power servo tool rest base (7), the top end of the power servo tool rest base (7) is slidably provided with a lifting cylinder (12), the top end of the lifting cylinder (12) is fixedly provided with a power servo tool rest backing plate (11), the top end of the power servo tool rest backing plate (11) is provided with a power servo tool rest (10), the inside of the power servo tool rest base (7) is provided with a lifting groove (20), the inside of the lifting groove (20) is provided with a hydraulic telescopic rod (19), the two sides of the lifting groove (20) are provided with guide grooves (8), the top end of the guide groove (8) is provided with a first connecting hole (21), the inside of the lifting cylinder (12) is provided with a groove (22), the top end of the hydraulic telescopic rod (19) is fixedly connected with the inside top end of the groove (22), the two side bottom ends of the lifting cylinder (12) are fixedly provided with guide blocks (13), the top end of the guide block (13) is fixedly provided with a guide rod (9) with the bottom end of the power servo tool rest backing plate (11), the guide rod (9) slides through the first connecting hole (21), and the surface of the guide rod (9) and the positions of the first connecting hole (21) on the upper and lower ends are connected with first nuts (23).

2. A test device for a servo system of a numerically controlled machine tool according to claim 1, characterized in that: The top end surface of the ground level iron (1) is provided with a clamping groove (2), the surface of the mounting plate (4) is provided with a second connecting hole (18), the inside of the second connecting hole (18) penetrates a connecting rod (16), the surface of the connecting rod (16) and the position of the top end of the second connecting hole (18) are connected with a second nut (17), the bottom end of the connecting rod (16) is provided with a clamping block (14), the clamping block (14) slides through the clamping groove (2), the two sides of the ground level iron (1) are provided with third connecting holes (3), the two sides of the mounting plate (4) are fixedly provided with connecting plates (5), the surface of the connecting plate (5) is provided with fourth connecting holes (15), the fourth connecting holes (15) and the third connecting holes (3) are inserted with bolts (6).

3. The testing device for servo system of CNC machine tool according to claim 1, characterized in that: The ground level iron (1) is horizontally arranged, the mounting plate (4) is a rectangular plate structure and is horizontally arranged, the power servo tool rest base (7) is a rectangular frame structure, and the lifting cylinder (12) is a rectangular cylinder structure and is vertically arranged.

4. The servo system test device for a numerical control machine tool according to Claim 1, characterized by: The power servo tool rest backing plate (11) is a rectangular plate structure and is horizontally arranged, the lifting groove (20) is a rectangular groove structure, the hydraulic telescopic rod (19) is vertically arranged, and the guide groove (8) is a rectangular groove structure and is vertically arranged.

5. The servo system test device for a numerical control machine tool according to Claim 1, characterized by: The groove (22) is a rectangular groove structure, the guide block (13) is a rectangular block structure and is horizontally arranged and inserted into the guide groove (8), and the guide rod (9) is a threaded rod structure and is vertically arranged.

6. The servo system test device for a numerical control machine tool according to Claim 2, characterized by: The cross sections of the clamping groove (2) and the clamping block (14) are T-shaped structures and are horizontally arranged, and the connecting rod (16) is a threaded rod structure and is vertically arranged.

7. The servo system test device for a numerical control machine tool according to Claim 2, characterized by: The connecting plate (5) is of L-shaped structure, and is vertically arranged at the outer side, the third connecting hole (3) is of threaded hole structure, the fourth connecting hole (15) and the third connecting hole (3) are horizontally aligned, and the bolt (6) is horizontally arranged.

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