Zero point positioning device for rotary table

Abstract

The utility model relates to the technical field of numerical control rotary tables, in particular to a zero-point positioning device for a rotary table, which comprises a numerical control rotary table and a working table mounted on the numerical control rotary table. A straight guide sleeve male and a conical guide sleeve male are installed on the numerical control rotary table, a straight guide sleeve female and a conical guide sleeve female are installed on the workbench, the straight guide sleeve female is connected with the straight guide sleeve male in a matched mode, and the conical guide sleeve female is connected with the conical guide sleeve male in a matched mode. A piston rod is arranged in the straight guide sleeve male, steel balls are installed on the two sides of the piston rod, and springs are arranged on the left side and the right side of the piston rod. According to the numerical control rotary table, the workbench and the numerical control rotary table body can be freely separated, the workbench can be freely separated from or locked on the numerical control rotary table through the straight guide sleeve male part, the conical guide sleeve male part and the corresponding female part, and the problem that the clamping effect is poor due to unstable clamping force in an existing pop-rivet type structure is solved; therefore, reliable locking and releasing of the workbench under the pressure-free condition are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control turntables, in particular to a zero point positioning device for turntables. Background Art

[0002] The emergence of intelligent industrial automation is heralding a revolutionary transformation in the manufacturing industry. Traditional manufacturing typically relies on extensive human input, resulting in low efficiency, high costs, and difficulty in ensuring quality during production. Intelligent industrial automation, however, integrates advanced technologies into the production process, enabling intelligent and automated production lines. The widespread use of equipment such as robots, drones, and intelligent warehousing systems has made production processes more efficient, flexible, and precise, significantly improving production efficiency and product quality. CNC turntables are core components of CNC machine tools. The rapid exchange of worktables on these turntables enables intelligent and automated production lines, improving production efficiency and reducing labor costs.

[0003] However, the existing CNC turntables have the following technical problems:

[0004] 1. Currently, the rivet-type system is widely used in CNC turntable zero-point positioning systems. This allows the worktable to be removed at will without pressure. Both clamping and loosening of the rivet require hydraulic pressure, and clamping is easily affected by pressure fluctuations, resulting in a difficulty maintaining the clamping force for a long time.

[0005] 2. On the other hand, the pull-stud structure used in the zero-point positioning system only has a cleaning air blow port at the top. Debris can easily accumulate at the root, causing wear of the positioning sleeve. At the same time, the pull-stud is used to tighten the positioning sleeve. Once iron chips enter the interior, they need to be removed by professionals. If they are not cleaned in time, it will cause inaccurate positioning and even damage the internal four-petal claws. The installation is complicated and the client cannot replace and install it by themselves. It needs to be installed by professionals, which is more expensive and difficult to repair.

[0006] Therefore, a zero-point positioning device for a turntable is needed that can solve the above-mentioned problem. Utility Model Content

[0007] The purpose of the utility model is to provide a zero-point positioning device for a turntable. The utility model can realize the free separation between the worktable and the CNC turntable body. Through the straight guide sleeve male, the tapered guide sleeve male and the corresponding female parts, the worktable can be freely detached from or locked on the CNC turntable, solving the problem of poor clamping effect caused by unstable clamping force in the existing rivet type structure, thereby ensuring the reliable locking and release of the worktable under no pressure.

[0008] The technical solution adopted by the present invention to solve the above technical problems is: a zero point positioning device for a turntable, comprising a CNC turntable and a workbench, wherein the workbench is mounted on the CNC turntable;

[0009] A straight guide sleeve male and a tapered guide sleeve male are installed on the CNC turntable, and a straight guide sleeve nut and a tapered guide sleeve nut are installed on the workbench. The straight guide sleeve nut is matched with the straight guide sleeve male, and the tapered guide sleeve nut is matched with the tapered guide sleeve male;

[0010] A piston rod is provided inside the male straight guide sleeve, and steel balls are installed on both sides of the piston rod. Springs are provided on the left and right sides of the piston rod. A clean air outlet, an air inlet hole A and a guide sleeve oil inlet hole A are provided inside the male straight guide sleeve. A bolt is installed in the guide sleeve oil inlet hole A, and the bolt is connected to the piston rod.

[0011] Furthermore, a base is installed on the CNC turntable, and the straight guide sleeve and the base are connected to each other through a spring.

[0012] Furthermore, a clean air blowing port B is provided on the base, the base is connected to the hydraulic oil inlet pipe, and a guide sleeve pressure switch B is installed on the hydraulic oil inlet pipe.

[0013] Furthermore, the base is also interconnected with the air intake pipe, and an airtightness detection switch B is installed on the air intake pipe.

[0014] Furthermore, a guide sleeve oil inlet hole B is provided on the CNC turntable, and a guide sleeve pressure switch A is installed on the guide sleeve oil inlet hole B. The guide sleeve pressure switch A is used to detect whether the straight guide sleeve male and the tapered guide sleeve male are loose.

[0015] Furthermore, a dust cover is installed on the straight guide sleeve, and a cleaning air blowing port A is opened on the dust cover.

[0016] Furthermore, a groove is provided on the piston rod, and when the piston rod moves upward, the steel ball can freely enter the groove on the piston rod.

[0017] Furthermore, an air source inlet is provided on the CNC turntable, and an airtightness detection switch A is installed at the air source inlet.

[0018] Furthermore, the CNC turntable is also provided with a cleaning air blowing hole, which is used to clean the straight guide sleeve and the tapered guide sleeve.

[0019] The advantages of the present invention are as follows: the present invention provides a zero point positioning device for a turntable, and the present invention has the following advantages:

[0020] 1. The utility model can realize the free separation between the workbench and the CNC turntable body. Through the straight guide sleeve male, tapered guide sleeve male and corresponding female parts, the workbench can be freely detached from or locked on the CNC turntable, solving the problem of poor clamping effect caused by unstable clamping force in the existing rivet type structure, thereby ensuring the reliable locking and release of the workbench under no pressure.

[0021] 2. The combined design of the straight guide sleeve male and female and the tapered guide sleeve male and female in the utility model can ensure repeatability accuracy. In addition, the utility model is provided with a cleaning air blow hole on the CNC turntable, and an air tightness detection switch A is installed at the air source inlet, and an air tightness detection switch B is installed on the air inlet pipe. The combination of the air tightness detection switch A and the air tightness detection switch B can effectively remove impurities around the straight guide sleeve male and female and the tapered guide sleeve male and female, and can detect whether the positioning sleeve is completely clamped, avoiding the risk of damage caused by iron filings entering the interior, and reducing maintenance costs and difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 This is a schematic diagram of the top view of the CNC turntable in the present utility model;

[0025] Figure 3 This is an enlarged structural diagram of the workbench in the present utility model;

[0026] Figure 4 This is a schematic structural diagram of the straight guide sleeve nut in the utility model;

[0027] Figure 5 This is a structural diagram of the cone guide sleeve nut of the utility model;

[0028] Figure 6 Schematic diagram of the internal structure of the workbench in the present utility model;

[0029] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at A in the middle;

[0030] Figure 8 This is an enlarged structural diagram of the tapered guide sleeve of the utility model;

[0031] in:

[0032] 1. CNC turntable; 101. Base; 2. Workbench;

[0033] 3. Straight guide sleeve male; 4. Clean the air inlet A; 5. Clean the air outlet;

[0034] 6. Air inlet hole A; 7. Guide sleeve oil inlet hole A; 8. Bolt;

[0035] 9. Piston rod; 91. Groove; 10. Spring;

[0036] 11. Air inlet B; 12. Airtightness inspection outlet; 13. Steel ball;

[0037] 14. Dust cover; 15. Straight guide bushing nut; 16. Taper guide bushing male;

[0038] 17. Cone guide sleeve nut; 18. Air tightness detection switch A; 19. Air source inlet;

[0039] 20. Clean the air blow hole; 21. Guide bushing oil inlet hole B; 22. Guide bushing pressure switch A;

[0040] 23. Air pressure source; 24. Air tightness detection switch B; 25. Cleaning air outlet B;

[0041] 26. Hydraulic oil inlet pipe; 27. Guide sleeve pressure switch B. DETAILED DESCRIPTION

[0042] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. The terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Example 1:

[0045] Figure 1 This is a schematic diagram of the structure of the utility model. Figure 2 This is a schematic diagram of the top view of the CNC turntable in the utility model. Figure 3 This is an enlarged structural diagram of the workbench in the utility model. Figure 4 This is a structural diagram of the straight guide sleeve nut in the utility model. Figure 5 This is a structural diagram of the cone guide sleeve nut of the utility model. Figure 6 This is a schematic diagram of the internal structure of the workbench in the utility model. Figure 7 for Figure 6 The enlarged structural diagram at A in the middle is shown. Figure 8 This is an enlarged structural diagram of the cone guide sleeve of the utility model, as shown in FIG. Figures 1 to 8 The zero-point positioning device for a turntable shown in the figure includes a CNC turntable 1 and a workbench 2, wherein the workbench 2 is mounted on the CNC turntable 1; a straight guide sleeve male 3 and a tapered guide sleeve male 16 are mounted on the CNC turntable 1, and a straight guide sleeve nut 15 and a tapered guide sleeve nut 17 are mounted on the workbench 2, wherein the straight guide sleeve nut 15 is mated with the straight guide sleeve male 3, and the tapered guide sleeve nut 17 is mated with the tapered guide sleeve male 16.

[0046] The utility model provides a guide sleeve oil inlet hole B21 on the CNC turntable 1, and a guide sleeve pressure switch A22 is installed on the guide sleeve oil inlet hole B21. The guide sleeve pressure switch A22 is used to detect whether the straight guide sleeve male 3 and the tapered guide sleeve male 16 are loose; an air source inlet 19 is provided on the CNC turntable 1, and an air tightness detection switch A18 is installed at the air source inlet 19. The CNC turntable 1 is also provided with a cleaning air blowing hole 20. The cleaning air blowing hole 20 is used to clean the straight guide sleeve male 3 and the tapered guide sleeve male 16.

[0047] The utility model is provided with a dust cover 14 on the straight guide sleeve male 3, a clean air blowing port A4 is provided on the dust cover 14, a piston rod 9 is provided inside the straight guide sleeve male 3, steel balls 13 are provided on both sides of the piston rod 9, springs 10 are provided on the left and right sides of the piston rod 9, a clean air outlet 5, an air inlet A6 and a guide sleeve oil inlet A7 are provided in the straight guide sleeve male 3, air can be introduced through the air inlet A6 to clean impurities around the straight guide sleeve male 3, a bolt 8 is installed in the guide sleeve oil inlet A7, the bolt 8 and the piston rod 9 are connected to each other, when the guide sleeve oil inlet A7 is opened, the clean air outlet 5, the air inlet A6 and the guide sleeve oil inlet A7 are opened, the clean air outlet 5, the air inlet A6 and the guide sleeve oil inlet A7 are opened, the clean air outlet 5, the air inlet A6 and the guide sleeve oil inlet A7 are opened, the clean air can be cleaned by the clean air 7 enters the hydraulic source, compressing the piston rod 9 connected by the bolt 8 and applying pressure to the spring 10. The utility model has a groove 91 on the piston rod 9. When the piston rod 9 moves upward, the steel ball 13 can freely enter the groove 91 on the piston rod 9, so that the workbench 2 can freely separate from the CNC turntable 1. When the hydraulic source of the guide sleeve into the oil hole A7 is disconnected, the spring 10 returns to its original state and the steel ball 13 returns to its original position. The elastic force of the spring 10 forces the edge of the groove 91 of the piston rod 9 to clamp the steel ball 13 to achieve locking. When the workbench 2 is on the CNC turntable 1, the workbench 2 is in a locked state. When the workbench 2 is in the locked state, the air source inlet 19 starts to connect to the air pressure source 23, and the airtightness detection switch A18 is used to set the rated pressure value. The upper computer is connected for communication. The upper computer sets a certain communication time (usually 3 to 5 seconds). If the airtightness detection switch A18 does not alarm during this period, it is assumed that the workbench 2 and the CNC turntable 1 are completely attached and locked. When the workbench 2 is in the loosened state, the air pressure source 23 enters the cleaning air port A4 and the cleaning air outlet 5 through the air inlet A6 to achieve cleaning work.

[0048] like Figure 1 and Figure 6 As shown, the utility model is equipped with a base 101 on the CNC turntable 1, the straight guide sleeve male 3 and the base 101 are connected to each other by a spring 10, a cleaning air blow port B25 is provided on the base 101, the base 101 is connected to the hydraulic oil inlet pipe 26, and a guide sleeve pressure switch B27 is installed on the hydraulic oil inlet pipe 26. The base 101 in the utility model is also connected to the air inlet pipe, and an airtightness detection switch B24 is installed on the air inlet pipe for measuring whether the workbench 2 and the CNC turntable 1 are indeed fitted together.

[0049] In summary, the present invention achieves both free disengagement and locking between the worktable 2 and the CNC turntable 1 by adding a straight guide sleeve male 3 and a tapered guide sleeve male 16 to the CNC turntable 1, and a straight guide sleeve female 15 and a tapered guide sleeve female 17 to the worktable 2. Furthermore, by coordinating the various functions of the guide sleeves, the worktable 2 and the CNC turntable 1 are integrated. This solves the problem of poor precision caused by the frequent disassembly and inspection of specific workpieces and fixtures.

[0050] Working Principle: The zero-point positioning device for the CNC turntable 1 in the present invention comprises two groups of four positioning sleeves, one of which is a straight guide sleeve, whose function is to guide the position between the worktable 2 and the turntable body. The other group is a tapered guide sleeve, whose function is to position the worktable 2 and the turntable body. Both groups are equipped with components such as a spring 10, a steel ball 13, a dust cover 14, a cleaning air blow path, an airtightness detection air path, and a loosening oil path. The spring 10 is compressed by the action of external hydraulic pressure, allowing the steel ball 13 to freely expand and contract, allowing the worktable 2 and the turntable body to be freely disassembled. The cleaning air blow path can be used to clean surrounding impurities and ensure that the area around the positioning sleeve is clean. After the hydraulic pressure is disconnected, the spring 10 resumes its action, and the position of the steel ball 13 remains fixed, so that the worktable 2 and the turntable body are clamped together by the elastic force of the spring 10 through the external tension of the steel ball 13. The airtightness detection air path is used for ventilation, and it can be detected whether the positioning sleeve is fully clamped. The loosening action of the positioning sleeve achieves the function of separating and locking the CNC turntable 1 body and the worktable 2. .

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A zero-point positioning device for a turntable, comprising a numerically controlled turntable (1) and a workbench (2), wherein the workbench (2) is mounted on the numerically controlled turntable (1); It is characterized by: A straight guide sleeve male (3) and a tapered guide sleeve male (16) are installed on the numerical control turntable (1), and a straight guide sleeve female (15) and a tapered guide sleeve female (17) are installed on the workbench (2); the straight guide sleeve female (15) is connected to the straight guide sleeve male (3), and the tapered guide sleeve female (17) is connected to the tapered guide sleeve male (16); A piston rod (9) is provided inside the straight guide sleeve male (3), steel balls (13) are installed on both sides of the piston rod (9), springs (10) are provided on both left and right sides of the piston rod (9), a clean air outlet (5), an air inlet hole A (6) and a guide sleeve oil inlet hole A (7) are provided inside the straight guide sleeve male (3), a bolt (8) is installed in the guide sleeve oil inlet hole A (7), and the bolt (8) and the piston rod (9) are connected to each other.

2. A zero-point positioning device for a turntable according to claim 1, characterized in that: A base (101) is installed on the numerical control turntable (1), and the straight guide sleeve (3) and the base (101) are connected to each other via a spring (10).

3. A zero-point positioning device for a turntable according to claim 2, characterized in that: The base (101) is provided with a clean air blowing port B (25), the base (101) is connected to a hydraulic oil inlet pipe (26), and a guide sleeve pressure switch B (27) is installed on the hydraulic oil inlet pipe (26).

4. The zero-point positioning device for a turntable according to claim 2, characterized in that: The base (101) is also connected to the air inlet pipe, and an airtightness detection switch B (24) is installed on the air inlet pipe.

5. The zero-point positioning device for a turntable according to claim 1, characterized in that: A guide sleeve oil inlet hole B (21) is provided on the numerical control turntable (1), and a guide sleeve pressure switch A (22) is installed on the guide sleeve oil inlet hole B (21). The guide sleeve pressure switch A (22) is used to detect whether the straight guide sleeve male (3) and the tapered guide sleeve male (16) are loose.

6. The zero-point positioning device for a turntable according to claim 1, characterized in that: A dust cover (14) is installed on the straight guide sleeve (3), and a cleaning air blowing port A (4) is opened on the dust cover (14).

7. The zero-point positioning device for a turntable according to claim 1, characterized in that: The piston rod (9) is provided with a groove (91), and when the piston rod (9) moves upward, the steel ball (13) can freely enter the groove (91) on the piston rod (9).

8. The zero-point positioning device for a turntable according to claim 1, characterized in that: An air source inlet (19) is provided on the numerical control turntable (1), and an airtightness detection switch A (18) is installed at the air source inlet (19).

9. The zero-point positioning device for a turntable according to claim 1, characterized in that: The numerical control turntable (1) is also provided with a cleaning air blowing hole (20), and the cleaning air blowing hole (20) is used to clean the straight guide sleeve (3) and the tapered guide sleeve (16).

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