A quick-change device for end fixtures of CNC machine tools with automatic center adjustment

Abstract

The present invention relates to the technical field of machine tool components, and in particular to a quick-changing device for an end fixture of a numerically controlled machine tool with automatic centering adjustment, comprising: a machine tool connection disk, a tool connection disk and a circuit connection port; a connection block is slidably connected to the tool connection disk, and a push cylinder is fixedly connected to the tool connection disk; a push-out block is slidably connected in the connection groove, and a push cylinder is also arranged in the connection groove; the output end of the push cylinder pushes the connection block; a positioning groove is provided on the tool connection disk; a positioning block is fixedly connected to the machine tool connection disk; the present invention detects the position of the tool connection disk relative to the machine tool connection disk by arranging a detection rod and a detection pressure sensor in the tool connection disk, and then adjusts the position of the tool connection disk to the center of the machine tool connection disk through the push of a fine-tuning block, so that when the machine tool connection disk and the tool connection disk are worn, the position deviation occurs after installation, and the present invention can make adjustments to reduce the precision error.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool components, and in particular to a quick-change device for an end fixture of a numerically controlled machine tool capable of automatically adjusting a center. Background Art

[0002] The end fixture quick change device of CNC machine tools is a key connection component that enables CNC machine tools to quickly change the tools at the end of the machine tool between different processing scenarios, greatly improving work efficiency and flexibility;

[0003] This device usually consists of a connection interface, a locking mechanism, a drive system, and a communication module;

[0004] The quick-change device allows CNC machine tools to adapt to a variety of complex processing requirements and quickly switch CNC machine tool processing tools;

[0005] The contact surface of the connecting parts of the quick-change device at the end of the CNC machine tool will gradually wear during the frequent plugging, unplugging, locking and unlocking process, which will cause the fitting clearance to increase, and the originally tight connection to become loose, and then the position will deviate; and the CNC machine tool will be subject to vibration and impact during operation, which will cause the connecting parts to undergo slight displacement or deformation under long-term action, thereby reducing the accuracy of the connection and causing limitations.

[0006] Therefore, we propose a CNC machine tool end fixture quick-change device with automatic center adjustment. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a quick-change device for an end fixture of a CNC machine tool with automatic center adjustment, which overcomes the deficiencies in the prior art and aims to solve the problems in the background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a quick-change device for the end fixture of a CNC machine tool with automatic centering adjustment, comprising: a machine tool connection plate, a tool connection plate, a gas-liquid connection port and a circuit connection port; a connection groove is provided on the machine tool connection plate; a connection block is slidably connected to the tool connection plate, and a push cylinder is fixedly connected to the tool connection plate; a push-out block is slidably connected in the connection groove, and a push cylinder is also provided in the connection groove; the output end of the push cylinder pushes the connection block; a positioning groove is provided on the tool connection plate; a positioning block is fixedly connected to the machine tool connection plate;

[0009] A positioning rod is installed on the machine tool connection disk; the positioning rod is located at the center of the machine tool connection disk; a detection mechanism and a fine-adjustment mechanism are provided on the tool connection disk; the detection mechanism contacts the positioning rod to detect the position of the tool connection disk and the machine tool connection disk; the fine-adjustment mechanism adjusts the position of the tool connection disk according to the position deviation detected by the detection mechanism, so that the tool connection disk is located at the center of the machine tool connection disk.

[0010] Preferably, the detection mechanism includes a detection rod, a detection spring and a detection pressure sensor; a detection groove is opened in the tool connecting disk; the detection grooves are evenly arranged on the tool connecting disk; the detection pressure sensor is fixedly connected in the detection groove; one end of the detection spring is fixedly connected to the detection pressure sensor, and the other end is fixedly connected to the detection rod.

[0011] Preferably, the fine-tuning mechanism includes a fine-tuning motor and a fine-tuning block; an adjustment slot is provided on the tool connecting plate; the fine-tuning block is slidably connected in the adjustment slot; the fine-tuning motor is fixedly connected in the adjustment slot; the output end of the fine-tuning motor is fixedly connected to a screw rod that cooperates with the thread of the fine-tuning block.

[0012] A detection rod and a detection pressure sensor are arranged in the tool connection disk to detect the position of the tool connection disk relative to the machine tool connection disk, and then the position of the tool connection disk is adjusted to the center of the machine tool connection disk by pushing the fine-tuning block. When the machine tool connection disk and the tool connection disk are worn, the position deviation occurs after installation, and the present invention can make adjustments to reduce the precision error.

[0013] Preferably, a rotating rod is fixedly connected in the detection groove; the detection rod is rotatably connected to the rotating rod; the rotating rod divides the detection rod into two sections, and the length of the section close to the detection spring is greater than the end away from the detection spring.

[0014] Preferably, the front end of the detection rod is bent outward into an arc shape.

[0015] Preferably, the positioning rod is detachably mounted on the machine tool connecting plate.

[0016] Preferably, an annular groove is formed on the machine tool connection disk and the tool connection disk; an annular block is slidably connected in the annular groove; and the gas-liquid connection port and the circuit connection port are both fixedly connected to the annular block.

[0017] By rotating the detection rod to make it equivalent to a lever, the error of the tool connection disk is amplified and transmitted to the detection pressure sensor, thereby improving the detection accuracy. This prevents the situation where the position deviation of the tool connection disk is small and the pressure change transmitted to the detection pressure sensor is small, thereby improving the detection accuracy of the detection pressure sensor of the present invention.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention arranges a detection rod and a detection pressure sensor in the tool connection disk to detect the position of the tool connection disk relative to the machine tool connection disk, and then pushes the fine-tuning block to adjust the position of the tool connection disk to the center of the machine tool connection disk. When the machine tool connection disk and the tool connection disk are worn, the position deviation occurs after installation, and the present invention can make adjustments to reduce the precision error.

[0020] 2. The present invention improves the detection accuracy by rotating the detection rod to make the detection rod equivalent to a lever, thereby amplifying the error of the tool connection disk and transmitting it to the detection pressure sensor, thereby preventing the situation where the position deviation of the tool connection disk is small and the pressure change transmitted to the detection pressure sensor is small, thereby improving the detection accuracy of the detection pressure sensor of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the present invention from another perspective;

[0023] Figure 3 It is a schematic diagram of the structure of the tool connection disk in the partial cross-section state of the present invention;

[0024] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0025] Figure 5 for Figure 3 The enlarged view of point B in the middle;

[0026] Figure 6 It is a cross-sectional view of the machine tool connection plate in the present invention.

[0027] In the figure: 1. Machine tool connection plate; 2. Tool connection plate; 11. Gas-liquid connection port; 12. Circuit connection port; 13. Connection groove; 21. Connection block; 22. Push cylinder; 23. Positioning groove; 24. Positioning block; 25. Positioning rod; 3. Detection rod; 31. Detection spring; 32. Detection pressure sensor; 33. Detection groove; 34. Rotating rod; 4. Fine-tuning motor; 41. Fine-tuning block; 42. Adjustment groove; 5. Annular groove; 51. Annular block; 6. Ejection block. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1: Refer to the attached specification Figure 1 , 2 , 3, 4 and 6, a CNC machine tool end fixture quick-change device with automatic centering adjustment, comprising: a machine tool connection plate 1, a tool connection plate 2, a gas-liquid connection port 11 and a circuit connection port 12; a connection groove 13 is provided on the machine tool connection plate 1; a connection block 21 is slidably connected to the tool connection plate 2, and a push cylinder 22 is fixedly connected to the tool connection plate 2; a push-out block 6 is slidably connected in the connection groove 13, and a push cylinder 22 is also provided in the connection groove 13; the output end of the push cylinder 22 pushes the connection block 21; a positioning groove 23 is provided on the tool connection plate 2; a positioning block 24 is fixedly connected to the machine tool connection plate 1;

[0030] A positioning rod 25 is installed on the machine tool connection disk 1; the positioning rod 25 is located at the center of the machine tool connection disk 1; a detection mechanism and a fine-tuning mechanism are provided on the tool connection disk 2; the detection mechanism contacts the positioning rod 25 to detect the position of the tool connection disk 2 and the machine tool connection disk 1; the fine-tuning mechanism adjusts the position of the tool connection disk 2 according to the position deviation detected by the detection mechanism, so that the tool connection disk 2 is located at the center of the machine tool connection disk 1.

[0031] In the present invention, the detection mechanism includes a detection rod 3, a detection spring 31 and a detection pressure sensor 32; a detection groove 33 is opened in the tool connection disk 2; the detection groove 33 is evenly arranged on the tool connection disk 2; the detection pressure sensor 32 is fixedly connected in the detection groove 33; one end of the detection spring 31 is fixedly connected to the detection pressure sensor 32, and the other end is fixedly connected to the detection rod 3.

[0032] In the present invention, the fine-tuning mechanism includes a fine-tuning motor 4 and a fine-tuning block 41; an adjustment slot 42 is provided on the tool connecting plate 2; the fine-tuning block 41 is slidably connected in the adjustment slot 42; the fine-tuning motor 4 is fixedly connected in the adjustment slot 42; and the output end of the fine-tuning motor 4 is fixedly connected with a screw rod that is threadedly matched with the fine-tuning block 41.

[0033] In the present invention, when the machine tool connection disk 1 and the tool connection disk 2 are connected together, the connection block 21 in the tool connection disk 2 is pushed by the corresponding push cylinder 22 and extends into the connection groove 13, so that the connection block 21 is engaged in the connection groove 13, the machine tool connection disk 1 and the tool connection disk 2 are connected together, the gas-liquid connection port 11 and the circuit connection port 12 on the machine tool connection disk 1 and the tool connection disk 2 are connected to each other, and the detection rod 3 is in contact with the positioning rod 25, and the fine-tuning block 41 on the tool connection disk 2 is in contact with the machine tool connection disk 1;

[0034] When replacing the tool connection disk 2, first the fine-tuning motor 4 on the tool connection disk 2 drives the corresponding screw to rotate in the opposite direction, so that the fine-tuning block 41 is received in the adjustment groove 42, and the ejection block 6 pushes the connection block 21 out of the connection groove 13, thereby releasing the connection between the machine tool connection disk 1 and the tool connection disk 2. After the tool connection disk 2 is removed from the machine tool connection disk 1, the tool connection disk 2 to be used is placed above the machine tool connection disk 1, and then moved downward, so that the detection rod 3 on the tool connection disk 2 contacts the side wall of the positioning rod 25 on the machine tool connection disk 1. Since the positioning rod 25 is in the center position of the machine tool connection disk 1, the detection rod 3 and the positioning rod After the tool connection disk 2 is in the center of the machine connection disk 1, the force transmitted from the detection rod 3 to the detection pressure sensor 32 through the detection spring 31 is equal in magnitude. If the magnitudes are inconsistent, the positions of the tool connection disk 2 and the machine connection disk 1 deviate, and the fine-tuning motor 4 drives the corresponding screw to rotate, so that the fine-tuning block 41 extends out of the adjustment slot 42 and contacts the machine connection disk 1. The position of the tool connection disk 2 is adjusted by the push of the fine-tuning block 41, so that the tool connection disk 2 is in the center of the machine connection disk 1. Subsequently, the connection block 21 extends into the connection slot 13 under the action of the jacking cylinder 22, thereby completing the replacement.

[0035] The present invention arranges a detection rod 3 and a detection pressure sensor 32 in the tool connection disk 2 to detect the position of the tool connection disk 2 relative to the machine tool connection disk 1, and then pushes the fine-tuning block 41 to adjust the position of the tool connection disk 2 to the center of the machine tool connection disk 1. When the machine tool connection disk 1 and the tool connection disk 2 are worn, the position deviation occurs after installation, and the present invention can make adjustments to reduce the precision error.

[0036] Embodiment 2: Based on Embodiment 1, refer to the attached Figure 2 , 3 , 5 and 6, in the present invention, a rotating rod 34 is fixedly connected in the detection groove 33; the detection rod 3 is rotatably connected to the rotating rod 34; the rotating rod 34 divides the detection rod 3 into two sections, and the length of the section close to the detection spring 31 is greater than the end away from the detection spring 31.

[0037] In the present invention, the front end of the detection rod 3 is bent outward into an arc shape.

[0038] In the present invention, the positioning rod 25 is detachably mounted on the machine tool connecting plate 1 .

[0039] In the present invention, an annular groove 5 is formed on the machine tool connection plate 1 and the tool connection plate 2 ; an annular block 51 is slidably connected in the annular groove 5 ; and the gas-liquid connection port 11 and the circuit connection port 12 are fixedly connected to the annular block 51 .

[0040] In the present invention, the detection rod 3 is rotatably connected in the detection groove 33, and the length of the end close to the detection pressure sensor 32 is greater than the length of the end away from the pressure sensor. Therefore, after the detection rod 3 contacts the positioning rod 25, the detection rod 3 is equivalent to a lever, which can amplify the position deviation of the tool connection disk 2 and transmit it to the detection pressure sensor 32. The detection pressure sensor 32 is subjected to the tension of the detection spring 31. When the tension on the detection pressure sensor 32 on one side is greater than that on the other side, it indicates that the position of the tool connection disk 2 is offset in the opposite direction, so that the fine-tuning block 41 pushes the tool connection disk 2 to move in the direction close to the detection pressure sensor 32.

[0041] In the present invention, the positioning rod 25 is threadedly connected to the machine tool connection plate 1. After a period of use, the positioning rod 25 is unscrewed and replaced with a new positioning rod 25, thereby preventing the positioning rod 25 from being worn out after long-term use, causing deviations in the positioning effect, thereby affecting the use effect of the present invention;

[0042] In the present invention, the gas-liquid connection port 11 and the circuit connection port 12 are installed on the annular block 51 and can move with the annular block 51. Therefore, when the position of the tool connection disk 2 is adjusted, the tool connection disk 2 can slide relative to the annular block 51, so as not to affect the gas-liquid connection port 11 and the circuit connection port 12, thereby preventing the situation that the gas-liquid connection port 11 and the circuit connection port 12 on the machine tool connection disk 1 and the tool connection disk 2 are connected, which affects the movement of the tool connection disk 2.

[0043] The present invention improves the detection accuracy by rotating the detection rod 3 so that the detection rod 3 is equivalent to a lever, and the error of the tool connecting disk 2 is amplified and transmitted to the detection pressure sensor 32, thereby preventing the situation where the position deviation of the tool connecting disk 2 is small and the pressure change transmitted to the detection pressure sensor 32 is small, thereby improving the detection accuracy of the detection pressure sensor 32 of the present invention.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected; the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A quick-change device for end fixtures of a CNC machine tool with automatic center adjustment, characterized in that: The invention comprises a machine tool connection plate (1), a tool connection plate (2), a gas-liquid connection port (11) and a circuit connection port (12); the machine tool connection plate (1) is provided with a connection groove (13); a connection block (21) is slidably connected to the tool connection plate (2), and a push cylinder (22) is fixedly connected to the tool connection plate (2); an ejection block (6) is slidably connected in the connection groove (13), and a push cylinder (22) is also arranged in the connection groove (13); the output end of the push cylinder (22) pushes the connection block (21); a positioning groove (23) is provided in the tool connection plate (2); and a positioning block (24) is fixedly connected to the machine tool connection plate (1); A positioning rod (25) is installed on the machine tool connection disk (1); the positioning rod (25) is located at the center of the machine tool connection disk (1); a detection mechanism and a fine adjustment mechanism are provided on the tool connection disk (2); the detection mechanism contacts the positioning rod (25) to detect the position of the tool connection disk (2) and the machine tool connection disk (1); the fine adjustment mechanism adjusts the position of the tool connection disk (2) according to the position deviation detected by the detection mechanism, so that the tool connection disk (2) is located at the center of the machine tool connection disk (1); The detection mechanism comprises a detection rod (3), a detection spring (31) and a detection pressure sensor (32); a detection groove (33) is provided in the tool connection plate (2); the detection grooves (33) are evenly arranged on the tool connection plate (2); the detection pressure sensor (32) is fixedly connected in the detection groove (33); one end of the detection spring (31) is fixedly connected to the detection pressure sensor (32), and the other end is fixedly connected to the detection rod (3); The fine-tuning mechanism comprises a fine-tuning motor (4) and a fine-tuning block (41); an adjustment slot (42) is provided on the tool connection plate (2); the fine-tuning block (41) is slidably connected in the adjustment slot (42); the fine-tuning motor (4) is fixedly connected in the adjustment slot (42); a screw rod threadably matched with the fine-tuning block (41) is fixedly connected to the output end of the fine-tuning motor (4); A rotating rod (34) is fixedly connected in the detection groove (33); the detection rod (3) is rotatably connected to the rotating rod (34); the rotating rod (34) divides the detection rod (3) into two sections, and the section close to the detection spring (31) is longer than the end away from the detection spring (31); The front end of the detection rod (3) is bent outwards into an arc shape.

2. The automatic centering adjustment quick-change device for end fixtures of a CNC machine tool according to claim 1, characterized in that: The positioning rod (25) is detachably mounted on the machine tool connecting plate (1).

3. The automatic centering adjustment quick-change device for end fixtures of a CNC machine tool according to claim 2, characterized in that: The machine tool connection plate (1) and the tool connection plate (2) are both provided with an annular groove (5); an annular block (51) is slidably connected in the annular groove (5); and the gas-liquid connection port (11) and the circuit connection port (12) are both fixedly connected to the annular block (51).

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