Adaptive milling force regulation milling machine tool holder

Abstract

The present application relates to the technical field of intelligent manufacturing equipment, and especially relates to a self-adaptive milling force regulation and control milling machine tool clamp. The present application comprises a clamp sleeve, the clamp sleeve is provided with a locking nut, the locking nut is provided with a chuck, the chuck is provided with a plurality of circumferentially uniformly distributed gaps, the clamp sleeve is threadedly connected with a threaded sleeve, a plurality of circumferentially uniformly distributed extrusion rods are slidably connected in the clamp sleeve, the threaded sleeve is used for extruding all the extrusion rods to move, and the extrusion rods are fixedly connected with flexible blocks. The present application adjusts the positions of all the extrusion rods and all the flexible blocks, when the locking nut and the clamp sleeve cannot be installed to a completely locked state, all the extrusion rods and all the flexible blocks move and jointly extrude the chuck, so that the chuck is subjected to circumferentially uniform extrusion force, the chuck deforms and tightly presses the milling cutter, the milling cutter is secondarily clamped, the probability that the milling cutter is loosened after the clamping force is reduced is reduced, and the stability of the milling cutter during work is ensured.

Description

Technical Field

[0001] This invention relates to the field of intelligent manufacturing equipment technology, and in particular to an adaptive milling force control milling machine tool fixture. Background Technology

[0002] Milling machines are indispensable processing equipment in modern manufacturing. Existing adaptive milling force control milling machines can automatically adjust processing parameters (such as feed rate, spindle speed, etc.) based on real-time monitoring of milling force, keeping the milling force within a set safe or optimal range. Among them, the milling machine tool holder is a key component connecting the milling cutter and the machine tool spindle. The core function of the milling machine tool holder is to provide sufficient and uniform clamping force to the milling cutter under conditions of high-speed rotation and complex milling forces, preventing the tool from loosening, vibrating, or axially displacing, thereby ensuring the machining quality and surface finish of the workpiece and extending the tool life. Currently, most existing milling machine tool holders adopt the traditional nut locking structure, that is, by tightening the locking nut, the chuck with a gap inside the nut is pushed to move axially within the collet, causing the chuck to deform and hold the tool.

[0003] However, the threaded pair between the lock nut and the collet will wear during long-term use. At the same time, impurities such as chips and oil in the working environment may invade the threaded mating surface. These factors together cause the lock nut to be unable to be tightened to the preset ideal position, resulting in a decrease in the actual clamping force of the collet on the tool and a "false tightening" phenomenon. Once this phenomenon occurs, the collet cannot maintain a stable clamping force, which may affect the machining accuracy at best, and at worst cause the tool to loosen or even be thrown out during the machining process, leading to a safety accident. Summary of the Invention

[0004] In order to overcome the shortcomings pointed out in the background art above, the present invention provides an adaptive milling force control milling machine tool fixture.

[0005] The technical solution is as follows: An adaptive milling force control milling machine tool fixture includes a collet, a locking nut on the collet, a chuck on the locking nut, and several circumferentially evenly distributed slits on the chuck to allow deformation of the chuck under circumferential pressure. A threaded sleeve is threadedly connected to the collet, and several circumferentially evenly distributed pressing rods are slidably connected inside the collet. The threaded sleeve is used to press all the pressing rods to move. A flexible block is fixed to each pressing rod, and all the pressing rods and all the flexible blocks are used to press the chuck.

[0006] More preferably, the thickness of the compression rod gradually increases from near the locking nut to far away from it.

[0007] More preferably, the locking nut is provided with a groove for all the pressing rods and all the flexible blocks to enter.

[0008] More preferably, the width of the groove is greater than the thickness of the extrusion rod and the flexible block.

[0009] More preferably, the locking nut is fixedly connected to a first positioning block, and the sleeve is fixedly connected to a second positioning block. The first positioning block and the second positioning block are used to determine the docking state between the sleeve and the locking nut.

[0010] More preferably, a positioning ring is fixedly connected inside the chuck, the positioning ring being used to center the milling cutter.

[0011] More preferably, the thickness of the positioning ring gradually increases from its inner ring to its outer ring, the side of the positioning ring away from the locking nut is a plane, and the side of the positioning ring close to the locking nut is a guide surface.

[0012] More preferably, a rotating ring is rotatably connected inside the chuck, and the rotating ring is provided with a plurality of inclined limiting grooves evenly distributed in the circumference. A clamping frame that slides on the positioning ring is slidably connected inside the limiting grooves.

[0013] More preferably, a rotating cover is threadedly connected to the locking nut at a position away from the clamp, and the rotating cover is provided with a pressing part for insertion between the locking nut and the clamp.

[0014] More preferably, the center of the pressing part is provided with a hole, the diameter of which gradually decreases from near the locking nut to far away from it.

[0015] Compared with the prior art, the present invention has the following advantages: By adjusting the positions of all the clamping rods and all the flexible blocks, when the locking nut and the collet cannot be installed to a fully locked state, all the clamping rods and all the flexible blocks move and jointly clamp the chuck, so that the chuck is subjected to a uniform circumferential clamping force. The chuck deforms and presses the end mill, performing a secondary clamping of the end mill, thereby reducing the probability of loosening after the clamping force on the end mill decreases, thus ensuring the stability of the end mill during operation. Furthermore, the rotation of the threaded sleeve is used to adjust the positions of all the clamping rods and all the flexible blocks, and the thickness of the clamping rods is set to a gradual shape, thereby... By changing the compressive force on the chuck, different types of end mills can be adaptively clamped. During the process of changing the compressive force on the chuck, the extrusion part is inserted between the locking nut and the chuck, allowing the chuck to tightly grip different types of end mills, thus improving the applicability of this device. Before clamping the end mills, all clamping frames pre-clamp different types of end mills, ensuring that the central axis of each type of end mill coincides with the central axis of the chuck. This reduces the probability of uneven circumferential deformation of the chuck during deformation due to the misalignment of different types of end mills, thereby ensuring the effectiveness of the chuck and improving the stability of the end mill's subsequent rotation. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural cross-sectional view of the jacket and locking nut of the present invention; Figure 3 This is a three-dimensional structural diagram of the extrusion rod and flexible block of the present invention; Figure 4 This is a three-dimensional structural diagram of the rotating ring of the present invention; Figure 5 This is a three-dimensional structural diagram of the extrusion rod and flexible block of the present invention; Figure 6 This is a three-dimensional structural diagram of the clamping frame of the present invention; Figure 7 This is a three-dimensional structural cross-sectional view of the rotating cover and the extrusion part of the present invention.

[0017] The reference numerals in the attached drawings are as follows: 1-clamp, 2-locking nut, 3-clamp, 4-threaded sleeve, 5-extrusion rod, 6-flexible block, 7-groove, 9-first positioning block, 10-second positioning block, 11-rotating ring, 12-positioning ring, 13-limiting groove, 14-clamping frame, 15-rotating cover, 16-extrusion section. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The threaded pair between the lock nut and the collet will wear during long-term use, causing the lock nut to be unable to be tightened to the preset ideal position. This reduces the actual clamping force of the collet on the tool, making it impossible for the collet to maintain a stable clamping force. This can affect machining accuracy or even cause the tool to loosen or be thrown out during machining, leading to safety accidents. Example 1

[0020] An adaptive milling force control milling machine tool fixture, referring to Figures 1-5 The system includes a jacket 1, a locking nut 2, and a locking nut 2. The locking nut 2 and the jacket 1 are connected by a conventional threaded connection. Initially, the locking nut 2 and the jacket 1 maintain a threaded connection to reduce the probability of part loss. The locking nut 2 is equipped with a chuck 3, which has several circumferentially evenly distributed slits to allow for deformation under circumferential pressure. As the chuck 3 moves into the jacket 1, it deforms under pressure. The jacket 1 is threadedly connected to a threaded sleeve 4, which is located inside the jacket 1. Several circumferentially evenly distributed slits are slidably connected within the jacket 1. Each of the compression rods 5, when the threaded sleeve 4 rotates, compresses all the compression rods 5 to move to the right. Through the joint compression of all the compression rods 5, the chuck 3 is further deformed. The thickness of the compression rods 5 gradually increases from right to left. The greater the distance the compression rods 5 move to the right, the greater the deformation of the chuck 3 under pressure. The compression rods 5 are fixed with flexible blocks 6. All the compression rods 5 and all the flexible blocks 6 are used to compress the chuck 3. The locking nut 2 is provided with a groove 7. The width of the groove 7 is greater than the thickness of the compression rods 5 and the flexible blocks 6. The groove 7 is used to allow all the compression rods 5 and all the flexible blocks 6 to enter.

[0021] Reference Figure 2 and Figure 3 The locking nut 2 is fixedly connected to the first positioning block 9, and the sleeve 1 is fixedly connected to the second positioning block 10. When the locking nut 2 is installed normally, the first positioning block 9 and the second positioning block 10 are aligned. The first positioning block 9 and the second positioning block 10 are used to determine the docking status of the sleeve 1 and the locking nut 2.

[0022] The specific working principle is as follows: When this device is needed to clamp the milling cutter, the operator removes the locking nut 2 from the collet 1, and then inserts the milling cutter into the locking nut 2 and the collet 3 from right to left. The locking nut 2 is screwed into the collet 1, and the locking nut 2 drives the collet 3 and the milling cutter to move to the right. The collet 3 is squeezed by all the pressing rods 5 and all the flexible blocks 6, which causes the collet 3 to deform under pressure and clamp the milling cutter.

[0023] During the clamping process of the end mill, if the locking nut 2 and the collet 1 wear down due to long-term use, and impurities adhere between them, the locking nut 2 and the collet 1 cannot be installed in a fully locked state. This will cause a gap between the chuck 3 and the end mill, and the first positioning block 9 and the second positioning block 10 will not be aligned. After observing that the first positioning block 9 and the second positioning block 10 are not aligned, the operator rotates the threaded sleeve 4, causing it to move to the right. The threaded sleeve 4 pushes all the pressing rods 5 to the right, and the pressing rods 5 drive the flexible blocks 6 to the right. All the pressing rods 5 and all the flexible blocks 6 move to the right and jointly press the chuck 3, so that the chuck 3 is subjected to a uniform circumferential pressing force. The chuck 3 deforms and presses the end mill, performing a secondary clamping of the end mill. When the chuck 3 becomes loose, the end mill is clamped again to reduce the probability of loosening after the clamping force on the end mill decreases, thereby ensuring the stability of the end mill during operation.

[0024] When the operator needs to clamp different types of milling cutters, the operator rotates the threaded sleeve 4, causing it to move adaptively to the right (initially, the threaded sleeve 4 is in the left limit state). Taking an increase in the diameter of the milling cutter as an example, the operator rotates the threaded sleeve 4, causing it to move to the right. At this time, the movement of the threaded sleeve 4 is small, and the milling cutter moves to the right by pressing all the compression rods 5 through all the flexible blocks 6. Taking a decrease in the diameter of the milling cutter as an example, the operator rotates the threaded sleeve 4, causing it to move to the right. At this time, the movement of the threaded sleeve 4 is large, and the threaded sleeve 4 drives all the flexible blocks 6 to move to the right through all the compression rods 5. Since the thickness of the compression rods 5 gradually increases from right to left, the greater the distance the compression rods 5 move to the right, the greater the deformation of the chuck 3 under pressure. By adjusting the compression force on the chuck 3 through the rotation of the threaded sleeve 4, the device can adaptively clamp different types of milling cutters, thus improving its applicability.

[0025] When the milling cutter is finished and needs to be disassembled or replaced, reverse the threaded sleeve 4 to move it to the left and reset it. The operator removes the locking nut 2 from the collet 1, and then takes out the milling cutter from the locking nut 2 and the collet 3. The milling cutter is then collected and replaced for the next use. Example 2

[0026] Based on Example 1, referring to Figure 4 and Figure 6 A positioning ring 12 is fixedly connected inside the chuck 3, allowing the milling cutter to pass through it. The positioning ring 12 centers the milling cutter, reducing the probability of uneven deformation of the chuck 3 due to milling cutter skew, thus ensuring the effectiveness of the chuck 3. The thickness of the positioning ring 12 gradually increases from its inner ring to its outer ring. The left side of the positioning ring 12 is a plane, and the right side is a guide surface, facilitating the insertion of the milling cutter into the positioning ring 12. A rotating ring 11 is rotatably connected inside the chuck 3. The rotating ring 11 is provided with several circumferentially evenly distributed inclined limiting grooves 13, within which sliding... A clamping frame 14 is connected to the positioning ring 12 and slides on it. When the milling cutter is inserted into the positioning ring 12 and the rotating ring 11, the rotating ring 11 is rotated, and the limiting groove 13 squeezes the clamping frame 14 to move, so that all the clamping frames 14 move and clamp the milling cutter. This is to initially clamp different types of milling cutters, so that the central axis of different types of milling cutters can coincide with the central axis of the chuck 3. This reduces the probability of uneven deformation of the chuck 3 in the circumferential direction when it deforms due to the skew of different types of milling cutters, thereby ensuring the use effect of the chuck 3 and improving the stability of the subsequent rotation of the milling cutter. Example 3

[0027] Based on Example 2, referring to Figure 3 and Figure 7 The right side of the locking nut 2 is threaded with a rotating cover 15. The rotating cover 15 is provided with a pressing part 16. The pressing part 16 is made of a deformable material and has a hole in the middle. The diameter of the hole gradually decreases from left to right. When different types of milling cutters are clamped, the operator drives the rotating cover 15 to rotate, causing the rotating cover 15 to move the pressing part 16 to the left. The pressing part 16 is inserted between the locking nut 2 and the chuck 3 and deforms to seal the gap between the locking nut 2 and the chuck 3. In the process of changing the pressing force on the chuck 3 by rotating the threaded sleeve 4, the pressing part 16 is inserted between the locking nut 2 and the chuck 3, so that the chuck 3 can tightly wrap different types of milling cutters, thereby improving the applicability of this device.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An adaptive milling force control milling machine tool fixture, characterized in that, The device includes a sleeve (1), a locking nut (2) provided in the sleeve (1), a chuck (3) provided in the locking nut (2), and a chuck (3) provided with several circumferentially evenly distributed slits to allow the chuck (3) to deform when subjected to circumferential pressure. The sleeve (1) is threadedly connected to a threaded sleeve (4). Several circumferentially evenly distributed extrusion rods (5) are slidably connected inside the sleeve (1). The threaded sleeve (4) is used to extrude all the extrusion rods (5) to move. A flexible block (6) is fixedly connected to each extrusion rod (5). All the extrusion rods (5) and all the flexible blocks (6) are used to extrude the chuck (3). The thickness of the compression rod (5) gradually increases from the point near the locking nut (2) to the point away from it; The locking nut (2) is fixedly connected to a first positioning block (9), and the sleeve (1) is fixedly connected to a second positioning block (10). The first positioning block (9) and the second positioning block (10) are used to determine the docking state of the sleeve (1) and the locking nut (2). A positioning ring (12) is fixedly connected inside the chuck (3), and the positioning ring (12) is used to center the milling cutter; The chuck (3) is rotatably connected to a rotating ring (11), and the rotating ring (11) is provided with a plurality of inclined limiting grooves (13) evenly distributed in the circumference. The limiting grooves (13) are slidably connected to a clamping frame (14) that slides on the positioning ring (12). The locking nut (2) is threadedly connected to a rotating cover (15) at a position away from the clamp (1). The rotating cover (15) is provided with a pressing part (16), which is used to insert between the locking nut (2) and the clamp (3).

2. The adaptive milling force control milling machine tool fixture according to claim 1, characterized in that, The locking nut (2) is provided with a groove (7) for all the pressing rods (5) and all the flexible blocks (6) to enter.

3. A milling machine tool fixture with adaptive milling force control according to claim 2, characterized in that, The width of the groove (7) is greater than the thickness of the extrusion rod (5) and the flexible block (6).

4. A milling machine tool fixture with adaptive milling force control according to claim 3, characterized in that, The thickness of the positioning ring (12) gradually increases from its inner ring to its outer ring. The side of the positioning ring (12) away from the locking nut (2) is a plane, and the side of the positioning ring (12) close to the locking nut (2) is a guide surface.

5. A milling machine tool fixture with adaptive milling force control according to claim 4, characterized in that, The compression part (16) has a hole in the middle, the diameter of which gradually decreases from near the locking nut (2) to far away.

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