Double-end numerical control machine tool anti-collision mechanism

Abstract

The utility model relates to double -end numerical control machine tool technical field discloses a double -end numerical control machine tool anti -collision mechanism, including machine tool main part, the upper top of machine tool main part is provided with two groups third linear motion devices symmetrically, when two tool tower main bodies are too close, the distance between two position sensors detects exceeds certain limit, will send the instruction to plc controller, is controlled by plc controller and is driven two groups contact mechanism to do the linear motion of opposition when two anti -collision components do linear motion, will gradually close two tool tower main bodies and the contact surface of second linear motion device after, the end of limit stop plate will be connected in the inside of limit slot, thereby completes the abutment of fixed plate, and because two groups contact mechanism are located between two tool tower main bodies, therefore, they can not continue to close, thereby effectively reduce the risk of impact damage due to too close.

Description

Technical Field

[0001] This utility model relates to the field of dual-head CNC machine tool technology, specifically to a collision prevention mechanism for dual-head CNC machine tools. Background Technology

[0002] In modern manufacturing, CNC machine tools are key processing equipment whose performance and efficiency directly affect the production quality and delivery cycle of products. With the continuous improvement of industrial automation and the increasing market demand for diversified, small-batch, and high-precision products, traditional single-head CNC machine tools have gradually revealed their limitations in dealing with complex processing tasks and efficient production. Double-head CNC machine tools are equipped with two spindles and tool turrets, which can process two workpieces or two parts of a workpiece at the same time, realizing the parallelization of the processing process.

[0003] For example, Chinese Patent No. CN220575361U discloses a double-head butt-joint machining tool, which includes: a base; a protective shell, the protective shell being fixedly installed on the top of the base; a turning part, the turning part being disposed inside the protective shell; two chip removal assemblies, both of which are disposed on the protective shell, the chip removal assemblies being used to assist in the discharge of chips generated during turning; and two rotating structures, both of which are disposed on the top of the base and both are located inside the protective shell.

[0004] In the prior art, since dual-head CNC machine tools are equipped with two independently movable turrets, during the machining process, the two turrets need to perform complex movement and positioning operations according to the machining requirements. However, there is currently a lack of effective real-time monitoring and precise intervention mechanisms. When the two turrets get too close due to factors such as operational errors, program errors, or external interference, it is difficult to detect quickly and take effective measures. Once the two turrets collide, the consequences are very serious. Expensive components such as turrets and cutting tools will be damaged, which will not only increase the company's equipment maintenance and replacement costs, but also cause production to stop and affect order delivery. Therefore, those skilled in the art provide a collision prevention mechanism for dual-head CNC machine tools to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide an anti-collision mechanism for a dual-head CNC machine tool, thereby solving the problems mentioned in the background art.

[0006] This utility model provides the following technical solution: a collision prevention mechanism for a dual-head CNC machine tool, comprising a machine tool body, two sets of third linear motion devices symmetrically arranged at the top of the machine tool body, each set of third linear motion devices having a second linear motion device slidably connected inside, and a tool turret body for loading tools rotatably connected inside the second linear motion device, the top of the machine tool body being located between the two third linear motion devices and a collision prevention component for preventing the two tool turret bodies from getting too close, the top of the collision prevention component having two sets of contact mechanisms symmetrically arranged at the top of the component that directly contact the mounting surfaces of the tool turret bodies and the second linear motion devices, and a position sensor fixedly connected to the center of the opposite side of each of the two tool turret bodies.

[0007] Preferably, the anti-collision assembly includes an anti-collision box fixedly connected to the top of the machine tool body, located between two sets of third linear motion devices. A PLC controller that receives signals from two position sensors is installed at the center of the top of the anti-collision box. Two sets of guide grooves are symmetrically fixedly connected to the top of the anti-collision box. Several limiting grooves are opened on the side of each pair of guide grooves that are far apart from each other at the top of the anti-collision box.

[0008] Preferably, a dual-axis motor is fixedly connected to the inner bottom of the impact-resistant box, and a lead screw is fixedly connected to each of the two output ends of the dual-axis motor. The ends of the two lead screws away from the dual-axis motor are rotatably connected to the impact-resistant box through bearings. A guide rod is fixedly connected to one side of the lead screw inside the impact-resistant box.

[0009] Preferably, each of the lead screw and guide rods has a movable frame sleeved on its outer wall. The movable frame is threadedly connected to the lead screw and slidably connected to the guide rod. The two movable frames move in opposite directions.

[0010] Preferably, each contact mechanism includes a support frame fixedly connected to the top of the movable frame, a fixed plate fixedly connected to the end of the support frame, two rows of movable rollers symmetrically fixedly connected to the side of the fixed plate away from the support frame, and a first fixed bracket fixedly connected to both sides of the fixed plate on the support frame, with an electric push rod rotatably sleeved inside the first fixed bracket.

[0011] Preferably, a second fixed bracket is fixedly connected to the outer wall of the fixed plate below each first fixed bracket. A limiting plate is rotatably sleeved inside the second fixed bracket. The end of the limiting plate abuts against the inside of the limiting groove. A third fixed bracket is fixedly connected to the outer wall of the limiting plate. The telescopic end of the electric push rod is rotatably sleeved inside the third fixed bracket.

[0012] Preferably, a first spindle box is fixedly connected to the upper top of the machine tool body on one side of one of the third linear motion devices, and a first linear motion device is provided on the upper top of the machine tool body on one side of the first spindle box, with a second spindle box slidably sleeved inside the first linear motion device.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This invention features two sets of contact mechanisms. When the two turret bodies get too close, the distance between them detected by the two position sensors exceeds a certain limit. A command is then sent to the PLC controller, which controls the anti-collision components to drive the two sets of contact mechanisms in relative linear motion. After the two anti-collision components move linearly, they gradually approach the contact surface between the two turret bodies and the second linear motion device. When they are fully in contact, the end of the limiting plate engages inside the limiting groove, thus abutting the fixing plate. Because the two sets of contact mechanisms are located between the two turret bodies, they cannot continue to get closer, effectively reducing the risk of impact damage caused by excessive proximity. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of an anti-collision mechanism for a dual-head CNC machine tool; Figure 2 This is a schematic diagram of the main structure of the turret in an anti-collision mechanism for a dual-head CNC machine tool; Figure 3 This is a schematic diagram of the main body of a dual-head CNC machine tool anti-collision mechanism; Figure 4 A schematic diagram of the anti-collision box in an anti-collision mechanism for a dual-head CNC machine tool; Figure 5 This is a schematic diagram of the segmented structure of the anti-collision box in an anti-collision mechanism for a dual-head CNC machine tool. Figure 6 This is a schematic diagram of the contact mechanism in an anti-collision mechanism for a dual-head CNC machine tool.

[0015] In the picture: 1. Machine tool body; 2. First spindle box; 3. First linear motion device; 4. Second spindle box; 5. Second linear motion device; 6. Third linear motion device; 7. Turret body; 8. Position sensor; 9. Anti-collision assembly; 91. Anti-collision box; 92. PLC controller; 93. Guide groove; 94. Limiting groove; 95. Dual-axis motor; 96. Lead screw; 97. Guide rod; 98. Movable frame; 10. Contact mechanism; 101. Support frame; 102. Fixed plate; 103. Movable roller; 104. First fixed bracket; 105. Electric push rod; 106. Second fixed bracket; 107. Limiting plate; 108. Third fixed bracket. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] Please see Figures 1-6 As shown, this utility model provides a technical solution: a double-head CNC machine tool anti-collision mechanism, including a machine tool body 1, two sets of third linear motion devices 6 are symmetrically arranged on the upper top of the machine tool body 1, a second linear motion device 5 is slidably connected inside each set of third linear motion devices 6, a tool turret body 7 for loading tools is rotatably connected inside the second linear motion device 5, an anti-collision component 9 for preventing the two tool turret bodies 7 from getting too close is arranged on the upper top of the machine tool body 1 between the two third linear motion devices 6, two sets of contact mechanisms 10 are symmetrically arranged on the upper top of the anti-collision component 9, which directly contact the mounting surfaces of the tool turret body 7 and the second linear motion device 5, and a position sensor 8 is fixedly connected to the center of the opposite side of the two tool turret bodies 7.

[0018] It should be noted that two sets of third linear motion devices 6 are symmetrically arranged on the machine tool body 1, and the second linear motion device 5 is slidably connected inside them, allowing the turret body 7 to move flexibly, meet various processing needs, and have a wider range of applications. An anti-collision component 9 is set between the two third linear motion devices 6, which can effectively prevent the two turret bodies 7 from getting too close, avoid turret collision accidents caused by operational errors or program errors, and reduce the risk of equipment damage. A position sensor 8 is fixedly connected to the center of the opposite side of the two turret bodies 7, which can monitor the position of the turret body 7 in real time. It works in conjunction with the anti-collision component 9 to improve the accuracy and timeliness of anti-collision. The model of the position sensor 8 can be EV-108M.

[0019] As one implementation method in this embodiment, please refer to Figures 3-6As shown, the anti-collision assembly 9 includes an anti-collision box 91 fixedly connected to the top of the machine tool body 1, located between two sets of third linear motion devices 6. A PLC controller 92 that receives signals from two position sensors 8 is installed at the center of the top of the anti-collision box 91. Two sets of guide grooves 93 are symmetrically fixedly connected to the top of the anti-collision box 91. Several limiting grooves 94 are opened on the side of each pair of guide grooves 93 that are far apart from each other at the top of the anti-collision box 91. A dual-axis motor 95 is fixedly connected to the bottom of the anti-collision box 91. Both output ends of the dual-axis motor 95 are fixedly connected to lead screws 96. The ends of the two lead screws 96 that are far away from the dual-axis motor 95 are rotatably sleeved with the anti-collision box 91 through bearings. A guide rod 97 is fixedly connected to the inside of the anti-collision box 91 on one side of the lead screw 96. A movable frame 98 is sleeved on the outer wall of each lead screw 96 and guide rod 97. The movable frame 98 is threadedly sleeved with the lead screw 96 and slidably sleeved with the guide rod 97. The two movable frames 98 move in opposite directions.

[0020] It should be noted that the PLC controller 92 installed at the top center of the anti-collision box 91 can accurately receive signals from the two position sensors 8 and monitor the position of the turret body 7 in real time. Once a collision risk is detected, it can react quickly to effectively avoid collision accidents and ensure the safe operation of the machine tool. The two sets of guide grooves 93 symmetrically fixed at the top of the anti-collision box 91 and the several limit grooves 94 provide stable guidance for the movement of related components. At the same time, the limit grooves 94 can play a reliable limiting role when necessary to prevent excessive movement of components and ensure the accuracy and stability of the anti-collision action. The dual-axis motor 95 fixed at the bottom of the anti-collision box 91 has two lead screws 96 connected to its two output ends moving in opposite directions. It can synchronously drive the two movable frames 98 to move in opposite directions to achieve fast and accurate anti-collision action and improve anti-collision efficiency.

[0021] As one implementation method in this embodiment, please refer to Figures 4-6 As shown, each contact mechanism 10 includes a support frame 101 fixedly connected to the top of the movable frame 98. A fixed plate 102 is fixedly connected to the end of the support frame 101. Two rows of movable rollers 103 are symmetrically fixedly connected to the side of the fixed plate 102 away from the support frame 101. First fixed brackets 104 are fixedly connected to both sides of the fixed plate 102 located on the support frame 101. An electric push rod 105 is rotatably sleeved inside the first fixed bracket 104. A second fixed bracket 106 is fixedly connected to the outer wall of the fixed plate 102 located below each first fixed bracket 104. A limit plate 107 is rotatably sleeved inside the second fixed bracket 106. The end of the limit plate 107 abuts against the inside of the limit groove 94. A third fixed bracket 108 is fixedly connected to the outer wall of the limit plate 107. The telescopic end of the electric push rod 105 is rotatably sleeved inside the third fixed bracket 108.

[0022] It should be noted that the two rows of movable rollers 103 symmetrically fixed on the end fixing plate 102 of the support frame 101 can convert sliding friction into rolling friction when in contact with the mounting surface of the turret body 7 and the second linear motion device 5, which greatly reduces friction loss, extends the service life of the contact mechanism 10 and related components, and reduces equipment maintenance costs. Through the electric push rod 105 rotatably sleeved inside the first fixed bracket 104, and its telescopic end rotatably sleeved with the third fixed bracket 108, the position and angle of the limiting plate 107 can be flexibly adjusted, thereby controlling the contact state between the contact mechanism 10 and the turret body 7 and other components to meet the anti-collision requirements under different processing scenarios, improving the adaptability and flexibility of the machine tool. The end of the limiting plate 107 abuts against the inside of the limiting groove 94, providing stable support and positioning for the contact mechanism 10, preventing it from shaking or shifting during operation, ensuring the accuracy and reliability of the anti-collision function, and ensuring the safe operation of the machine tool.

[0023] As one implementation method in this embodiment, please refer to Figure 1 and Figure 3 As shown, the upper top of the machine tool body 1 is fixedly connected to one side of one of the third linear motion devices 6, and the upper top of the machine tool body 1 is provided with a first linear motion device 3 on one side of the first spindle box 2. The second spindle box 4 is slidably sleeved inside the first linear motion device 3.

[0024] It should be noted that the first spindle box 2 can be stably fixed on one side, providing basic power and support for conventional machining; the second spindle box 4 can be flexibly moved through the first linear motion device 3 to realize machining operations in different positions, meet the multi-process and multi-position machining needs of complex workpieces, reduce the number of workpiece clamping times, and improve machining efficiency. The first linear motion device 3 enables the second spindle box 4 to slide along a specific direction, and the relative position of the second spindle box 4 and the first spindle box 2, as well as the distance from the workpiece, can be adjusted according to the machining requirements, which is convenient for machining workpieces of different sizes and shapes, adapts to various machining scenarios, and enhances the versatility and flexibility of the machine tool.

[0025] Working principle: When the machine tool is working, the two turret bodies 7 move and rotate under the drive of the corresponding third linear motion device 6 and the second linear motion device 5 to complete the machining operation. When the two turret bodies 7 are too close, the position sensor 8 fixedly connected at the center of the opposite side of the two turret bodies 7 will detect the distance between them in real time. Once the distance exceeds the set safety limit, the position sensor 8 will immediately send a command to the PLC controller 92 installed at the center of the top of the anti-collision box 91. After receiving the signal, the PLC controller 92 quickly starts the dual-axis motor 95 at the bottom of the anti-collision box 91. The two outputs of the dual-axis motor 95 drive the lead screw 96 fixedly connected to it to rotate. Since the two lead screws 96 move in opposite directions, and the movable frame 98 is threadedly connected to the lead screw 96 and slidably connected to the guide rod 97, the two movable frames 98 will make relative linear movements under the guidance of the guide rod 97. The movement of the movable frame 98 drives the support frame 101 fixedly connected to its top and the fixed plate 10 fixedly connected to its end. 2. Moving together, the two sets of contact mechanisms 10 gradually approach the contact surfaces of the two turret bodies 7 and the second linear motion device 5. When the contact mechanisms 10 are in complete contact, the limiting plate 107, which is rotatably sleeved inside the second fixed bracket 106 on the outer side wall of the fixed plate 102, will be engaged with the end of the electric push rod 105, which is rotatably sleeved inside the first fixed bracket 104, and the third fixed bracket 108, so that the end of the limiting plate 107 will be engaged with the limiting groove 94 opened at the top of the anti-collision box 91, thereby completing the contact with the fixed plate 102 and fixing the position of the contact mechanism 10.

[0026] Since the two sets of contact mechanisms 10 are located between the two turret bodies 7, they hinder the turret bodies 7 from getting closer. Therefore, the two turret bodies 7 cannot get closer, which effectively reduces the risk of collision damage caused by the two getting too close and ensures the safe and stable operation of the machine tool.

[0027] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A collision prevention mechanism for a dual-head CNC machine tool, comprising a machine tool body (1), characterized in that: Two sets of third linear motion devices (6) are symmetrically arranged at the top of the machine tool body (1). Each set of third linear motion devices (6) is slidably connected to a second linear motion device (5). The second linear motion device (5) is rotatably connected to a turret body (7) that loads the cutting tool. An anti-collision assembly (9) is provided between the two third linear motion devices (6) at the top of the machine tool body (1) to prevent the two turret bodies (7) from getting too close. Two sets of contact mechanisms (10) are symmetrically arranged at the top of the anti-collision assembly (9) to directly contact the mounting surface of the turret body (7) and the second linear motion device (5). A position sensor (8) is fixedly connected to the center of the opposite side of the two turret bodies (7).

2. The anti-collision mechanism for a dual-head CNC machine tool according to claim 1, characterized in that: The anti-collision assembly (9) includes an anti-collision box (91) fixedly connected to the upper top of the machine tool body (1) between two sets of third linear motion devices (6). A PLC controller (92) that receives signals from two position sensors (8) is installed at the center of the upper top of the anti-collision box (91). Two sets of guide grooves (93) are symmetrically fixedly connected to the upper top of the anti-collision box (91). Several limiting grooves (94) are opened on the side of each pair of guide grooves (93) that are far apart from each other at the upper top of the anti-collision box (91).

3. The anti-collision mechanism for a dual-head CNC machine tool according to claim 2, characterized in that: The inner bottom of the impact box (91) is fixedly connected to a dual-axis motor (95). Both output ends of the dual-axis motor (95) are fixedly connected to lead screws (96). The ends of the two lead screws (96) away from the dual-axis motor (95) are rotatably sleeved with the impact box (91) through bearings. Inside the impact box (91), on one side of the lead screws (96), a guide rod (97) is fixedly connected.

4. The anti-collision mechanism for a dual-head CNC machine tool according to claim 3, characterized in that: Each of the lead screw (96) and guide rod (97) has a movable frame (98) sleeved on its outer wall. The movable frame (98) is threadedly sleeved with the lead screw (96) and slidably sleeved with the guide rod (97). The two movable frames (98) move in opposite directions.

5. The anti-collision mechanism for a dual-head CNC machine tool according to claim 4, characterized in that: Each contact mechanism (10) includes a support frame (101) fixedly connected to the top of the movable frame (98). A fixed plate (102) is fixedly connected to the end of the support frame (101). Two rows of movable rollers (103) are symmetrically fixedly connected to the side of the fixed plate (102) away from the support frame (101). A first fixed bracket (104) is fixedly connected to both sides of the fixed plate (102) located on the support frame (101). An electric push rod (105) is rotatably sleeved inside the first fixed bracket (104).

6. The anti-collision mechanism for a dual-head CNC machine tool according to claim 5, characterized in that: The outer wall of the fixing plate (102) is fixedly connected to a second fixing bracket (106) below each first fixing bracket (104). The second fixing bracket (106) is rotatably sleeved with a limiting plate (107). The end of the limiting plate (107) abuts against the inside of the limiting groove (94). The outer wall of the limiting plate (107) is fixedly connected to a third fixing bracket (108). The telescopic end of the electric push rod (105) is rotatably sleeved inside the third fixing bracket (108).

7. A collision prevention mechanism for a dual-head CNC machine tool according to any one of claims 1-6, characterized in that: The upper top of the machine tool body (1) is fixedly connected to one side of one of the third linear motion devices (6) with a first spindle box (2). The upper top of the machine tool body (1) is provided with a first linear motion device (3) on one side of the first spindle box (2). The first linear motion device (3) is slidably sleeved with a second spindle box (4).

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