A self-adaptive clamping force control device for a numerical control lathe

Abstract

The utility model discloses a numerical control lathe self -adaptation clamping force control device relates to numerical control lathe technical field, the utility model discloses a machine tool, two motors are fixedly connected with machine tool outer wall, the inside setting of machine tool has clamping mechanism for clamping work piece, the inside setting of machine tool has dismantling mechanism, the utility model passes through two motors synchronous drive first two -way screw rod, drives fixed block and moves along the guide block steadily, makes clamping plate contact work piece, realizes the flexible pre -clamping to work piece under the action of the elastic mechanism that connecting rod and first spring constitute, effectively avoids initial rigid impact, and simultaneously, sensor real -time monitoring clamping state and will data feedback to external controller to control the operation of motor, make clamping force reach preset optimal value, before clamping work piece, through manual rotation of the rotating lever drive second two -way screw rod, can adjust both sides baffle and push work piece to machine tool center, realized the quick centering of work piece.

Description

Technical Field

[0001] This utility model belongs to the field of CNC lathe technology, and in particular relates to an adaptive clamping force control device for CNC lathes. Background Technology

[0002] In the field of CNC lathe machining, the precision, reliability, and intelligence level of the workpiece clamping device are key factors that determine the machining quality, efficiency, and safety.

[0003] Chinese patent CN215659094U discloses a clamping device for a CNC lathe, including a horizontal plate, a support rod at the bottom of the horizontal plate, a CNC lathe body at the top of the horizontal plate, a control panel on the surface of the CNC lathe body, a power unit and a clamping device respectively disposed inside the CNC lathe body, the power unit being disposed on the side of the clamping device, and the clamping device including a base plate disposed on the inner bottom wall of the CNC lathe body, a movable plate disposed inside the base plate, and a side groove formed on the surface of the base plate.

[0004] As shown above, the device is equipped with a top cover and a bottom cover to clamp and fix parts of different sizes, improving the scope of use and practicality of part clamping. At the same time, a power device is provided to provide power for clamping the parts. However, the power device cannot adjust the clamping force according to the real-time clamping status and the processing conditions. During finishing, unnecessary deformation may be introduced due to the relatively large clamping force. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an adaptive clamping force control device for CNC lathes, which solves the problem that the power unit cannot adjust the clamping force in conjunction with the real-time clamping status.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: an adaptive clamping force control device for a CNC lathe, comprising a machine tool, two motors fixedly connected to the outer wall of the machine tool, a clamping mechanism for clamping workpieces provided inside the machine tool, and a disassembly mechanism provided inside the machine tool; The clamping mechanism includes a first bidirectional lead screw fixedly connected to the output shafts of two motors via a coupling. Two fixing blocks are threadedly connected to the outer walls of the two first bidirectional lead screws. A fixing shaft is fixedly connected to the inner wall of each fixing block. Two sliding blocks are slidably connected to the outer wall of each fixing shaft. A first spring is fixedly connected to the side of each sliding block that is far away from each other. A connecting rod is rotatably connected to the outer wall of each sliding block. A clamping plate is rotatably connected to the end of each connecting rod that is far away from the two sliding blocks.

[0007] Preferably, the parts in contact with the outer wall of the fixed block are the same, the ends of the two first springs away from the sliding block are fixedly connected to the inner wall of the fixed block, and the sliding block is located inside the two first springs.

[0008] Preferably, two guide blocks are fixedly connected to the inner wall of the machine tool, and the inner walls of the two guide blocks are slidably connected to the outer walls of the two fixed blocks, which is used to guide the movement of the fixed blocks. A fixed frame is fixedly connected to the bottom of the machine tool. A second bidirectional lead screw is rotatably connected to the inner wall of the fixed frame. Two baffles are threadedly connected to the outer wall of the second bidirectional lead screw. The outer walls of the two baffles are slidably connected to the inner wall of the machine tool. One side of the second bidirectional lead screw passes through the outer wall of the fixed frame and extends to the outside of the fixed frame. A rotating rod is fixedly connected to the outer wall of the second bidirectional lead screw.

[0009] Preferably, the disassembly mechanism includes a limiting frame fixedly connected to the outer walls of the two clamping plates, a sensor is inserted into the inner wall of the limiting frame, a clamping plate is clamped to the outer wall of the clamping plates, and the outer wall of the clamping plate contacts the outer wall of the sensor.

[0010] Preferably, a first limiting block is fixedly connected to the bottom of the sensor, two housings are fixedly connected to the outer wall of the clamping plate, the inner walls of the two housings contain the same parts, a sliding shaft is slidably connected to the inner wall of the housing, and a second limiting block is fixedly connected to the side of the sliding shaft near the first limiting block.

[0011] Preferably, a second spring is fixedly connected to the side of the second limiting block near the sliding shaft, and the end of the second spring away from the second limiting block is fixedly connected to the inner wall of the housing, with the sliding shaft located inside the second spring.

[0012] This utility model has the following beneficial effects: 1. This CNC lathe's adaptive clamping force control device synchronously drives the first bidirectional lead screw through two motors, causing the fixed block to move smoothly along the guide block, so that the clamping plate contacts the workpiece. Under the action of the elastic mechanism formed by the connecting rod and the first spring, the workpiece is flexibly pre-clamped, effectively avoiding initial rigid impact. At the same time, the sensor monitors the clamping status in real time and feeds the data back to the external controller, thereby controlling the operation of the motor to make the clamping force reach the preset optimal value. Before clamping the workpiece, the second bidirectional lead screw can be driven by manually rotating the rotating rod, and the side baffles can be adjusted to push the workpiece to the center of the machine tool, realizing the rapid centering of the workpiece and laying the foundation for subsequent processing.

[0013] 2. This CNC lathe's adaptive clamping force control device allows the second limit block to be moved by manually pulling the sliding shaft, compressing the second spring and releasing the first limit block, thus enabling the sensor to be removed. Maintenance is simple and labor-saving. During installation, simply put the sensor and the first limit block back in, and after releasing the sliding shaft, the restoring force of the second spring will automatically drive the second limit block to move, completing the positioning and pre-tightening of the sensor. Finally, the clamping plate is fastened to achieve double locking, ensuring the installation stability and measurement accuracy of the sensor during long-term use.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the first bidirectional lead screw structure of this utility model; Figure 3 This is a schematic diagram of the baffle structure of this utility model; Figure 4 This is a schematic diagram of the second bidirectional lead screw structure of this utility model; Figure 5 This is a schematic diagram of the sensor structure of this utility model.

[0017] The attached diagram lists the components represented by each number as follows: 1. Machine tool; 101. Motor; 2. Clamping mechanism; 201. First bidirectional lead screw; 202. Fixing block; 203. Fixing shaft; 204. Sliding block; 205. First spring; 206. Connecting rod; 207. Clamping plate; 208. Guide block; 209. Fixing frame; 210. Second bidirectional lead screw; 211. Baffle; 212. Rotating rod; 3. Disassembly mechanism; 301. Limiting frame; 302. Sensor; 303. Clamping plate; 304. First limiting block; 305. Housing; 306. Sliding shaft; 307. Second limiting block; 308. Second spring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] This utility model provides two technical solutions: Figures 1-4 The first embodiment of the adaptive clamping force control device for CNC lathe is shown: The adaptive clamping force control device for CNC lathe includes a machine tool 1, two motors 101 are fixedly connected to the outer wall of the machine tool 1, a clamping mechanism 2 is provided inside the machine tool 1 for clamping the workpiece, and a disassembly mechanism 3 is provided inside the machine tool 1. The clamping mechanism 2 includes a first bidirectional lead screw 201 fixedly connected to the output shafts of two motors 101 via a coupling. Two fixing blocks 202 are threadedly connected to the outer walls of the two first bidirectional lead screws 201. A fixing shaft 203 is fixedly connected to the inner wall of the fixing block 202. Two sliding blocks 204 are slidably connected to the outer wall of the fixing shaft 203. A first spring 205 is fixedly connected to the side of the two sliding blocks 204 that is far away from each other. A connecting rod 206 is rotatably connected to the outer wall of the two sliding blocks 204. A clamping plate 207 is rotatably connected to the end of the two connecting rods 206 that is far away from the two sliding blocks 204. Two motors 101 synchronously drive the first bidirectional lead screw 201, which drives the fixed block 202 to move smoothly along the guide block 208, so that the clamping plate 207 contacts the workpiece. Under the action of the elastic mechanism formed by the connecting rod 206 and the first spring 205, the workpiece is flexibly pre-clamped.

[0020] The parts that are in contact with the outer wall of the fixed block 202 are the same. The ends of the two first springs 205 away from the sliding block 204 are fixedly connected to the inner wall of the fixed block 202. The sliding block 204 is located inside the two first springs 205.

[0021] Two guide blocks 208 are fixedly connected to the inner wall of the machine tool 1. The inner walls of the two guide blocks 208 are slidably connected to the outer walls of the two fixed blocks 202, which are used to guide the movement of the fixed blocks 202. A fixed frame 209 is fixedly connected to the bottom of the machine tool 1. A second bidirectional lead screw 210 is rotatably connected to the inner wall of the fixed frame 209. Two baffles 211 are threadedly connected to the outer wall of the second bidirectional lead screw 210. The outer walls of the two baffles 211 are slidably connected to the inner wall of the machine tool 1. One side of the second bidirectional lead screw 210 passes through the outer wall of the fixed frame 209 and extends to the outside of the fixed frame 209. A rotating rod 212 is fixedly connected to the outer wall of the second bidirectional lead screw 210. Before clamping the workpiece, the second bidirectional lead screw 210 is driven by manually rotating the rotating rod 212. The adjustable side baffles 211 push the workpiece to the center of the machine tool 1, realizing the rapid centering of the workpiece and laying the foundation for subsequent processing.

[0022] First, the two motors 101 are started by an external controller, synchronously driving the two first bidirectional lead screws 201 to rotate. This causes the two fixed blocks 202 to move closer together. During this process, they move along the guide block 208. When the two fixed blocks 202 are close together, the two clamping plates 207 first contact the workpiece. The workpiece then presses against the clamping plates 207, causing the connecting rod 206 to move. This, in turn, causes the sliding block 204 to slide within the fixed blocks 202 and compress the first spring 205. The first spring 205 provides a reaction force, pressing against the clamping plates 207 in the opposite direction, thus enabling the clamping plates 207 to clamp the workpiece. During the clamping process, sensor 302 will always sense the clamping status. When the clamping force is insufficient, sensor 302 will transmit the data to the external controller, and then the external controller will start motor 101 to continue rotating, so that the two fixed blocks 202 continue to move closer. When the clamping force is sufficient, the external controller will stop starting motor 101. Before clamping the workpiece, the workpiece must first be placed inside the machine tool 1, and then the rotating rod 212 is manually rotated to drive the second bidirectional lead screw 210 to rotate. When the second bidirectional lead screw 210 rotates, it will drive the two baffles 211 to move closer to each other, thereby moving the workpiece so that the workpiece can be located in the center of the machine tool 1, which is convenient for subsequent processing.

[0023] Figure 5 The second embodiment is shown. The main difference between the first embodiment of the adaptive clamping force control device for CNC lathe is that the disassembly mechanism 3 includes a limiting frame 301 fixedly connected to the outer wall of the two clamping plates 207. A sensor 302 is inserted into the inner wall of the limiting frame 301. A clamping plate 303 is snapped into the outer wall of the clamping plate 207. The outer wall of the clamping plate 303 is in contact with the outer wall of the sensor 302. The core function of sensor 302 is to sense and detect the magnitude of the clamping force applied to the workpiece by clamping plate 207 in real time, and convert this physical quantity into an electrical signal and transmit it to an external controller.

[0024] The sensor 302 is fixedly connected to the bottom of a first limiting block 304. Two housings 305 are fixedly connected to the outer wall of the clamping plate 207. The inner walls of the two housings 305 contain the same parts. A sliding shaft 306 is slidably connected to the inner wall of the housing 305. A second limiting block 307 is fixedly connected to the side of the sliding shaft 306 near the first limiting block 304.

[0025] The second limiting block 307 is fixedly connected to the side of the sliding shaft 306 with a second spring 308. The end of the second spring 308 away from the second limiting block 307 is fixedly connected to the inner wall of the housing 305. The sliding shaft 306 is located inside the second spring 308. Pulling the sliding shaft 306 moves the second limiting block 307, which compresses the second spring 308 and releases the first limiting block 304, allowing the sensor 302 to be removed. This makes maintenance simple and effortless.

[0026] When sensor 302 needs to be disassembled for maintenance, first manually pull the two sliding shafts 306 to move the position of the second limiting block 307. During the movement of the second limiting block 307, the second spring 308 will be compressed. At this time, the second limiting block 307 will no longer limit the first limiting block 304. Then remove the clamping plate 303, and the first limiting block 304 can be pulled out from above, and the sensor 302 can be removed. When installation is required, simply insert the sensor 302 and the second limiting block 307 back into the limiting frame 301, and then release the sliding shafts 306. At this time, the second spring 308 will squeeze the second limiting block 307, causing the position of the second limiting block 307 to move and limit the first limiting block 304, thereby limiting the position of the sensor 302. Then, clamp the clamping plate 303 to further reinforce the position of the sensor 302 to ensure measurement accuracy.

[0027] Furthermore, all content not described in detail in this specification is existing technology known to those skilled in the art, and the model parameters of each electrical component are not specifically limited; conventional equipment can be used.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adaptive clamping force control device for a CNC lathe, comprising a machine tool (1), wherein two motors (101) are fixedly connected to the outer wall of the machine tool (1), characterized in that, The machine tool (1) is provided with a clamping mechanism (2) for clamping the workpiece, and the machine tool (1) is provided with a disassembly mechanism (3). The clamping mechanism (2) includes a first bidirectional lead screw (201) fixedly connected to the output shafts of two motors (101) via a coupling. The outer walls of the two first bidirectional lead screws (201) are threaded with two fixing blocks (202). The inner walls of the fixing blocks (202) are fixedly connected with a fixing shaft (203). The outer walls of the fixing shaft (203) are slidably connected with two sliding blocks (204). The sides of the two sliding blocks (204) that are far apart from each other are fixedly connected with a first spring (205). The outer walls of the two sliding blocks (204) are rotatably connected with connecting rods (206). The ends of the two connecting rods (206) that are far away from the two sliding blocks (204) are rotatably connected with clamping plates (207).

2. The adaptive clamping force control device for a CNC lathe according to claim 1, characterized in that, The outer wall of the fixed block (202) is in contact with the same parts. The ends of the two first springs (205) away from the sliding block (204) are fixedly connected to the inner wall of the fixed block (202). The sliding block (204) is located inside the two first springs (205).

3. The adaptive clamping force control device for a CNC lathe according to claim 2, characterized in that, The inner wall of the machine tool (1) is fixedly connected to two guide blocks (208), and the inner walls of the two guide blocks (208) are slidably connected to the outer walls of the two fixed blocks (202) to guide the movement of the fixed blocks (202); The machine tool (1) is fixedly connected to a fixed frame (209) at the bottom. A second bidirectional lead screw (210) is rotatably connected to the inner wall of the fixed frame (209). Two baffles (211) are threadedly connected to the outer wall of the second bidirectional lead screw (210). The outer walls of the two baffles (211) are slidably connected to the inner wall of the machine tool (1). One side of the second bidirectional lead screw (210) passes through the outer wall of the fixed frame (209) and extends to the outside of the fixed frame (209). A rotating rod (212) is fixedly connected to the outer wall of the second bidirectional lead screw (210).

4. The adaptive clamping force control device for a CNC lathe according to claim 1, characterized in that, The disassembly mechanism (3) includes a limiting frame (301) fixedly connected to the outer wall of two clamping plates (207). A sensor (302) is inserted into the inner wall of the limiting frame (301). A clamping plate (303) is clamped to the outer wall of the clamping plate (207). The outer wall of the clamping plate (303) is in contact with the outer wall of the sensor (302).

5. The adaptive clamping force control device for a CNC lathe according to claim 4, characterized in that, The sensor (302) is fixedly connected to a first limiting block (304) at its bottom. The clamping plate (207) is fixedly connected to two housings (305). The inner walls of the two housings (305) contain the same parts. The inner walls of the housings (305) are slidably connected to a sliding shaft (306). The sliding shaft (306) is fixedly connected to a second limiting block (307) on the side near the first limiting block (304).

6. The adaptive clamping force control device for a CNC lathe according to claim 5, characterized in that, The second limiting block (307) is fixedly connected to the side of the sliding shaft (306) with a second spring (308). The end of the second spring (308) away from the second limiting block (307) is fixedly connected to the inner wall of the housing (305). The sliding shaft (306) is located inside the second spring (308).

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