High-precision milling cutter stable in clamping

Abstract

The invention relates to the technical field of machining cutters, and particularly discloses a high-precision milling cutter stable in clamping, the high-precision milling cutter stable in clamping comprises a cutter holder and a cutter body, the cutter holder comprises a connecting part, a mounting part connected to the bottom surface of the connecting part and a locking part connected to the bottom surface of the mounting part; a through hole is formed in the middle of the locking part, and the through hole is divided into a cylindrical hole and a circular truncated cone hole; the cutter body comprises a connecting section, a positioning section and a cutter head, the positioning section comprises a circular truncated cone section connected to the bottom face of the connecting section and a cylindrical section connected to the top face of the cutter head, and the circumferential face of the circular truncated cone section is attached to the inner circumferential face of the circular truncated cone hole. The connecting section is sleeved with a sleeve, the circumferential face of the connecting section is connected with a positioning plate, and the inner circumferential face of the sleeve is connected with a first limiting plate. A mounting cavity is formed in the mounting part, and a second limiting plate is connected to the top surface of the mounting cavity; the inner wall of the bottom end of the sleeve is connected with a baffle ring; an opening for the positioning plate to penetrate through is formed in the inner circumferential surface of the baffle ring; and a driving mechanism for driving the sleeve to slide is mounted in the mounting cavity. The method has the effect of improving the workpiece machining precision.

Description

Technical Field

[0001] The present invention relates to the technical field of machining tools, and particularly to a high-precision milling cutter with stable clamping. Background Art

[0002] A milling cutter is a rotating tool with one or more cutting teeth used for milling. During operation, each cutting tooth intermittently cuts off the surplus of the workpiece in turn. Milling cutters are mainly used for machining planes, steps, grooves, formed surfaces, and cutting workpieces on milling machines, etc.

[0003] In the related art, in the clamping and fixing of a milling cutter, a spring collet needs to be used. When a traditional milling cutter is fixedly installed, the spring collet is first installed in a nut sleeve, and then the milling cutter shank is inserted into the spring collet. Then the nut sleeve is screwed onto the spindle. Subsequently, two wrenches are used. One wrench is clamped on the spindle, and the other wrench is clamped on the nut. Fix the spindle wrench and rotate the nut wrench. During the process of screwing the nut tightly, the spindle gradually contracts the spring collet, and the spring collet gradually clamps the milling cutter shank.

[0004] In the machining of milling cutters, especially in the machining of precision parts, it is required that the axis of the milling cutter and the axis of the spindle are collinear, so that the precision of the machined parts is higher. However, since the clamping of the milling cutter needs to cooperate with a spring collet, during the use of the spring collet, it is inevitable to use the spring collet frequently. When the spring collet is used in some relatively harsh environments, such as in a humid, extreme temperature, or corrosive environment, and when a large force is applied during use, etc., these methods will cause problems such as wear, aging, and deformation of the spring collet, making the clamping of the spring collet on the milling cutter unstable, causing the axis of the milling cutter and the axis of the spindle to deviate, and resulting in a problem of reduced machining precision of the parts. Summary of the Invention

[0005] In order to improve the problem of reduced machining precision of parts, the present application provides a high-precision milling cutter with stable clamping.

[0006] The high-precision milling cutter with stable clamping provided by the present application adopts the following technical solutions: A high-precision milling cutter with firm clamping, comprising a tool holder and a tool body. The tool holder includes a connecting portion, a mounting portion, and a locking portion. The mounting portion is connected to the bottom of the connecting portion, and the locking portion is connected to the bottom of the mounting portion. A through hole is provided at the middle position of the locking portion. The through hole is divided into a cylindrical hole and a frustum-shaped hole, and the cylindrical hole is located above the frustum-shaped hole. The tool body includes a connecting section, a positioning section, and a tool head. The positioning section includes a frustum-shaped section and a cylindrical section. The top surface of the frustum-shaped section is connected to the bottom surface of the connecting section, the peripheral surface of the frustum-shaped section fits with the inner peripheral surface of the frustum-shaped hole, the cylindrical section is connected to the bottom surface of the frustum-shaped section, and the top surface of the tool head is connected to the bottom surface of the cylindrical section. A sleeve is sleeved outside the connecting section, and the sleeve slides on the inner wall of the through hole. Two positioning plates are symmetrically connected to the peripheral surface of the connecting section, and two first limiting plates are symmetrically connected to the inner peripheral surface of the sleeve. An installation cavity communicating with the cylindrical hole is provided inside the mounting portion. Two second limiting plates symmetrically arranged with respect to the connecting section are connected to the top surface of the installation cavity. The positioning plates are located between the first limiting plates and the second limiting plates. A retaining ring is connected to the inner wall of the bottom end of the sleeve. An opening for the two positioning plates to pass through is provided on the inner peripheral surface of the retaining ring. The two side surfaces of the positioning plate are respectively attached to the side surfaces of the first limiting plate and the second limiting plate. A driving mechanism for driving the sleeve to slide is installed in the installation cavity.

[0007] Optionally, the driving mechanism includes a threaded sleeve, a rotating ring, and a screw. The threaded sleeve is sleeved on the outer peripheral surface of the sleeve. The threaded sleeve is located inside the installation cavity. The outer peripheral surface of the top end of the sleeve has threads, and the inner peripheral surface of the threaded sleeve is in threaded transmission with the top end of the sleeve. The rotating ring is connected to the outer peripheral surface of the threaded sleeve. A first annular groove for the rotating ring to rotate is provided on the inner wall of the installation cavity. A second annular groove is provided on the inner wall of the first annular groove. A rotating hole is provided on the peripheral surface of the installation portion, and the rotating hole communicates with the second annular groove. The screw is rotatably arranged in the rotating hole. A plurality of inclined grooves evenly distributed along the circumference of the rotating ring are provided on the peripheral surface of the rotating ring. The threads on the screw cooperate with the inclined grooves of the rotating ring.

[0008] Optionally, a plurality of first balls are evenly arranged along the circumference of the top surface of the rotating ring, and a plurality of second balls are evenly arranged along the circumference of the bottom surface of the rotating ring. A first rolling groove for the first balls to roll is provided on the top surface of the first annular groove and the top surface of the rotating ring, and a second rolling groove for the second balls to roll is provided on the bottom surface of the first annular groove and the bottom surface of the rotating ring.

[0009] Optionally, a hexagonal groove is provided on the end face of the screw for a hexagonal wrench to be inserted. A positioning ring is provided on the inner wall of the rotating hole, and the end face of the positioning ring fits with the end face of the screw. An arc-shaped plate is connected to the end face of the positioning ring away from the screw, and the arc-shaped plate is detachably connected to the outer peripheral surface of the installation portion.

[0010] Optionally, the installation cavity communicates with the bottom surface of the installation part. An annular slot is arranged on the top surface of the locking part in a circumferential manner around the locking part. A plug ring for inserting into the annular slot is connected to the bottom surface of the installation part. The top surface of the locking part is attached to the bottom surface of the installation part, and the outer peripheral surface of the plug ring is threadedly connected to the innermost wall of the annular slot.

[0011] Optionally, a first connection ring is connected to the circumferential surface of the bottom of the connection part, and a second connection ring is connected to the circumferential surface of the top of the installation part. The first connection ring is attached to the second connection ring. The bottom surface of the connection part is tightly attached to the top surface of the installation part, and the first connection ring and the second connection ring are detachably connected.

[0012] Optionally, a plurality of positioning columns are connected to the bottom surface of the connection part, and the plurality of positioning columns are evenly distributed around the circumference of the connection part. A plurality of positioning grooves for inserting the plurality of positioning columns are arranged on the top surface of the installation part.

[0013] Optionally, a first flow channel is arranged in the connection part. A first pipeline is rotatably connected in the first flow channel. A piston is connected to the circumferential surface of the bottom of the first pipeline, and the piston is slidably sealed to the inner wall of the first flow channel. A liquid storage tank is arranged on the bottom surface of the installation part, and the first flow channel communicates with the liquid storage tank. A second flow channel is arranged on the bottom surface of the liquid storage tank, and the second flow channel communicates with the installation cavity. A second pipeline is connected to the top surface of the connection section, and the second pipeline is aligned with the second flow channel. The second pipeline is pressed against the bottom surface of the connection part. A third flow channel is arranged in the tool body, and the third flow channel communicates with the second pipeline. A liquid outlet hole communicating with the third flow channel is arranged at the bottom end of the tool head.

[0014] Optionally, a fourth flow channel is arranged on the top surface of the installation part, and one end of the fourth flow channel communicates with the liquid storage tank. A fifth flow channel is vertically arranged in the installation part, and the top end of the fifth flow channel communicates with the end of the fourth flow channel far from the liquid storage tank respectively. A first annular flow channel is arranged on the bottom surface of the annular slot, and the bottom end of the fifth flow channel communicates with the first annular flow channel. A sixth flow channel is arranged in the locking part, and the top end of the sixth flow channel communicates with the first annular flow channel. A second annular flow channel is arranged on the circumferential surface of the frustum section, and the bottom end of the sixth flow channel communicates with the second annular flow channel. A seventh flow channel is arranged in the frustum section, and the top end of the seventh flow channel communicates with the second annular flow channel. The bottom end of the seventh flow channel communicates with the bottom surface of the positioning section, and the bottom end of the seventh flow channel faces the tool head.

[0015] Optionally, the top end of the side surface of the positioning plate close to the second limiting plate is chamfered, the bottom end of the side surface of the second limiting plate close to the positioning plate is chamfered, and the chamfer of the positioning plate and the chamfer of the second limiting plate are attached to each other.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. When installing the tool body, align the connecting section with the sleeve, align the positioning plate with the opening, insert the connecting section into the sleeve, and insert the positioning plate into the opening. When the positioning plate passes over the retaining ring, rotate the tool body so that the positioning plate rotates to the top surface of the retaining ring until the side surface of the positioning plate is flush with the side surface of the first limiting plate. The driving mechanism drives the sleeve to rise. The sleeve drives the positioning plate to rise through the retaining ring, and the positioning plate drives the tool body to rise. During the rising process of the sleeve, the second limiting plate moves to the side of the positioning plate away from the first limiting plate. The first limiting plate and the second limiting plate position the positioning plate, fixing the position of the tool body. The peripheral surface of the cylindrical section of the positioning section fits against the inner peripheral surface of the conical hole, and the conical section is positioned by the locking portion, and the conical section is coaxial with the locking portion. By using the conical section and the conical hole, the axis of the tool body is made collinear with the axis of the tool holder, replacing the clamping of the tool body by a spring collet. There will be no problem of low fixing accuracy of the tool body due to wear and deformation of the spring collet. Moreover, through the clamping of the positioning plate by the first limiting plate and the second limiting plate, the positioning of the tool body is more secure, and there will be no situation where the tool body rotates within the tool holder. 2. When it is necessary to drive the sleeve to rise and fall, rotate the driving screw. The screw pushes the inclined groove on the circumferential surface of the rotating ring through the thread, and the screw can drive the rotating ring to rotate. The rotating ring drives the threaded sleeve to rotate, and the threaded sleeve drives the sleeve to rise and fall, thereby driving the sleeve to rise and fall. 3. When the peripheral surface of the conical section of the tool body is pressed against the inner peripheral surface of the conical hole of the locking portion, the second pipe is pressed against the bottom surface of the connecting portion. By injecting coolant into the first pipe, the coolant enters the liquid storage tank through the first flow channel. The liquid in the liquid storage tank then flows into the second flow channel, and the coolant in the second flow channel enters the third flow channel through the second pipe. The coolant in the third flow channel is then ejected through the liquid outlet holes. When the tool tip is machining the workpiece, it can cool and lower the temperature of the tool tip and the workpiece. 4. The coolant in the liquid storage tank sequentially enters the first annular flow channel through the fourth flow channel and the fifth flow channel. The coolant in the first annular flow channel enters the second annular flow channel through the sixth flow channel, and the coolant in the second annular flow channel is ejected through the seventh flow channel. The coolant ejected from the first flow channel cools the blade body of the tool tip. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the high-precision milling cutter according to the embodiment of the present application; Figure 2 is an exploded structural diagram of the high-precision milling cutter according to the embodiment of the present application; Figure 3 is a sectional structural diagram of the tool holder according to the embodiment of the present application; Figure 4 is a structural diagram of the tool body according to the embodiment of the present application; Figure 5It is a schematic exploded view of the driving mechanism in the embodiment of the present application; Figure 6 It is a schematic structural view of the top end of the sleeve in the embodiment of the present application; Figure 7 It is a schematic structural view of the bottom end of the sleeve in the embodiment of the present application; Figure 8 It is a schematic cross-sectional structural view of the tool holder and the tool body in the embodiment of the present application; Figure 9 It is Figure 8 An enlarged schematic structural view of part A in

[0018] Explanation of reference numerals: 1. Tool holder; 11. Connection part; 111. First connection ring; 112. Positioning column; 12. Installation part; 121. Installation cavity; 122. Second limiting plate; 123. First annular groove; 124. Second annular groove; 125. Rotation hole; 126. Insertion ring; 127. Second connection ring; 128. Positioning groove; 13. Locking part; 131. Cylindrical hole; 132. Conical hole; 133. Annular slot; 2. Tool body; 21. Connection section; 211. Positioning plate; 22. Positioning section; 221. Conical section; 222. Cylindrical section; 23. Tool tip; 3. Sleeve; 31. First limiting plate; 32. Retaining ring; 321. Opening; 4. Driving mechanism; 41. Threaded sleeve; 42. Rotating ring; 421. Inclined groove; 43. Screw; 431. Hexagonal groove; 44. First ball; 45. Second ball; 46. First rolling groove; 47. Second rolling groove; 48. Positioning ring; 49. Arc-shaped plate; 51. First flow channel; 52. First pipeline; 521. Bearing; 522. Piston; 53. Liquid storage tank; 54. Second flow channel; 55. Second pipeline; 56. Third flow channel; 57. Liquid outlet hole; 61. Fourth flow channel; 62. Fifth flow channel; 63. First annular flow channel; 64. Sixth flow channel; 65. Second annular flow channel; 66. Seventh flow channel; 71. First sealing ring; 72. Second sealing ring; 73. Third sealing ring; 74. Fourth sealing ring; 75. Fifth sealing ring; 76. Sixth sealing ring. Detailed implementation manners

[0019] The following Figures 1-9 Further detailed description of the present application will be made with reference to the attached

[0020] The embodiment of the present application discloses a high-precision milling cutter with firm clamping. Refer to Figures 1-9, the high-precision milling cutter includes a tool holder 1 and a tool body 2. The tool holder 1 includes a connecting portion 11, a mounting portion 12, and a locking portion 13. The connecting portion 11 is mounted on the spindle of the machine tool motor. The mounting portion 12 is connected to the bottom of the connecting portion 11, and the locking portion 13 is connected to the bottom of the mounting portion 12. A through hole is provided at the middle position of the locking portion 13, which is divided into a cylindrical hole 131 and a frustum-shaped hole 132. The cylindrical hole 131 is located above the frustum-shaped hole 132, and the bottom diameter of the frustum-shaped hole 132 is larger than the diameter of the cylindrical hole 131. The tool body 2 includes a connecting section 21, a positioning section 22, and a tool head 23. The positioning section 22 includes a frustum-shaped section 221 and a cylindrical section 222. The top surface of the frustum-shaped section 221 is coaxially connected to the bottom surface of the connecting section 21. The circumferential surface of the frustum-shaped section 221 is in contact with the inner circumferential surface of the frustum-shaped hole 132. The cylindrical section 222 is coaxially connected to the bottom surface of the frustum-shaped section 221. The top surface of the tool head 23 is coaxially connected to the bottom surface of the cylindrical section 222. The top surface diameter of the frustum-shaped section 221 is larger than the diameters of the connecting section 21 and the tool head 23. A sleeve 3 is sleeved outside the connecting section 21. The sleeve 3 slides on the inner wall of the through hole. Two positioning plates 211 are symmetrically connected to the circumferential surface of the connecting section 21. Two first limiting plates 31 are symmetrically connected to the inner circumferential surface of the sleeve 3. An installation cavity 121 communicating with the cylindrical hole 131 is provided inside the installation portion 12. Two second limiting plates 122 symmetrically arranged with respect to the connecting section 21 are connected to the top surface of the installation cavity 121. The positioning plates 211 are located between the first limiting plates 31 and the second limiting plates 122. A retaining ring 32 is connected to the inner wall of the bottom end of the sleeve 3. The first limiting plate 31 is connected to the top surface of the retaining ring 32. An opening 321 for the two positioning plates 211 to pass through is provided on the inner circumferential surface of the retaining ring 32. The two side surfaces of the positioning plates 211 are respectively in contact with the side surfaces of the first limiting plate 31 and the second limiting plate 122. A driving mechanism 4 for driving the sleeve 3 to slide is installed in the installation cavity 121.

[0021] When the tool body 2 needs to be installed, align the connecting section 21 with the sleeve 3, align the positioning plate 211 with the opening 321, insert the connecting section 21 into the sleeve 3, and insert the positioning plate 211 into the opening 321. When the positioning plate 211 passes over the retaining ring 32, rotate the tool body 2 to make the positioning plate 211 rotate to the top surface of the retaining ring 32 until the side surface of the positioning plate 211 is flush with the side surface of the first limiting plate 31. Then, the driving mechanism 4 drives the sleeve 3 to rise. The sleeve 3 drives the positioning plate 211 to rise through the retaining ring 32, and the positioning plate 211 drives the tool body 2 to rise. During the rising process of the sleeve 3, the second limiting plate 122 moves to the side surface of the positioning plate 211 away from the first limiting plate 31. The first limiting plate 31 and the second limiting plate 122 position the positioning plate 211, fixing the position of the tool body 2. The circumferential surface of the cylindrical section 222 of the positioning section 22 fits against the inner circumferential surface of the frustum-shaped hole 132, and the frustum-shaped section 221 is positioned by the locking portion 13 and is coaxial with the locking portion 13. By using the frustum-shaped section 221 and the frustum-shaped hole 132, the axis of the tool body 2 is made collinear with the axis of the tool holder 1, replacing the clamping of the tool body 2 by a spring collet. This avoids the problem of low fixing accuracy of the tool body 2 caused by wear and deformation of the spring collet. Moreover, through the clamping of the positioning plate 211 by the first limiting plate 31 and the second limiting plate 122, the positioning of the tool body 2 is more secure, and the tool body 2 will not rotate within the tool holder 1.

[0022] The top end of the side surface of the positioning plate 211 close to the second limiting plate 122 is chamfered, and the bottom end of the side surface of the second limiting plate 122 close to the positioning plate 211 is chamfered. The chamfers of the positioning plate 211 and the second limiting plate 122 fit together. When the connecting section 21 is lifted upward, the connecting section 21 drives the positioning plate 211 to rise. During the rising process of the positioning plate 211, since the positioning plate 211 does not fit against the first limiting plate 31, the chamfer at the bottom end of the second limiting plate 122 fits against the chamfer at the top end of the positioning plate 211, and the second limiting plate 122 pushes the positioning plate 211 to fit against the first limiting plate 31 until the chamfer of the second limiting plate 122 passes over the chamfer of the first positioning plate 211. Then, the second limiting plate 122 closely adheres to the side surface of the positioning plate 211. At this time, the side surface of the positioning plate 211 closely adheres to the side surface of the first limiting plate 31, and the side surface of the second limiting plate 122 closely adheres to the side surface of the positioning plate 211, fixing the positioning plate 211.

[0023] The driving mechanism 4 includes a threaded sleeve 41, a rotating ring 42 and a screw rod 43. The installation cavity 121 is cylindrical. The threaded sleeve 41 is sleeved on the outer peripheral surface of the sleeve 3. The threaded sleeve 41 is located in the installation cavity 121. The outer peripheral surface of the top end of the sleeve 3 has threads. The inner peripheral surface of the threaded sleeve 41 is in threaded transmission with the top end of the sleeve 3. The rotating ring 42 is coaxially connected to the outer peripheral surface of the threaded sleeve 41. The inner wall of the installation cavity 121 is provided with a first annular groove 123 for the rotating ring 42 to rotate; the inner wall of the first annular groove 123 is provided with a second annular groove 124. The peripheral surface of the installation part 12 is provided with a rotating hole 125. The rotating hole 125 communicates with the second annular groove 124. The screw rod 43 is rotatably arranged in the rotating hole 125. The peripheral surface of the rotating ring 42 is provided with a plurality of inclined grooves 421 evenly distributed along the circumference of the rotating ring 42. The threads on the screw rod 43 cooperate with the inclined grooves 421 of the rotating ring 42.

[0024] When it is necessary to drive the sleeve 3 to lift or lower, rotate the screw rod 43. The screw rod 43 pushes the inclined grooves 421 on the peripheral surface of the rotating ring 42 through the threads, and the screw rod 43 can drive the rotating ring 42 to rotate. The rotating ring 42 drives the threaded sleeve 41 to rotate, and the threaded sleeve 41 drives the sleeve 3 to lift or lower, so as to drive the sleeve 3 to lift or lower.

[0025] A plurality of first balls 44 are evenly arranged around the circumference of the top surface of the rotating ring 42, and a plurality of second balls 45 are evenly arranged around the circumference of the bottom surface of the rotating ring 42; a first rolling groove 46 for the first balls 44 to roll is provided on the top surface of the first annular groove 123 and the top surface of the rotating ring 42, and a second rolling groove 47 for the second balls 45 to roll is provided on the bottom surface of the first annular groove 123 and the bottom surface of the rotating ring 42.

[0026] The first balls 44 and the second balls 45 fix the position of the rotating ring 42. When the rotating ring 42 rotates, the rotating ring 42 rotates in the second annular groove 124 through the first balls 44 and the second balls 45, which can reduce the friction generated by the rotation of the rotating ring 42.

[0027] A hexagonal groove 431 is provided on the end face of the screw rod 43 for a hexagonal wrench to be inserted. A positioning ring 48 is provided on the inner wall of the rotating hole 125. The end face of the positioning ring 48 abuts against the end face of the screw rod 43. An arc-shaped plate 49 is connected to the end face of the positioning ring 48 away from the screw rod 43. The arc-shaped plate 49 is detachably connected to the outer peripheral surface of the installation part 12; when it is necessary to drive the screw rod 43 to rotate, insert the hexagonal wrench into the rotating hole 125. The hexagonal wrench passes through the positioning ring 48 and enters the hexagonal groove 431. The hexagonal wrench rotates the screw rod 43, and the screw rod 43 rotates self in the rotating hole 125 under the restriction of the positioning ring 48 and the inner wall of the end of the rotating hole 125.

[0028] The installation cavity 121 communicates with the bottom surface of the installation part 12. An annular slot 133 is arranged on the top surface of the locking part 13 in a circumferential manner around the locking part 13. A plug ring 126 for inserting into the annular slot 133 is connected to the bottom surface of the installation part 12. The top surface of the locking part 13 is attached to the bottom surface of the installation part 12, and the outer peripheral surface of the plug ring 126 is threadedly connected to the innermost wall of the outermost side of the annular slot 133.

[0029] When it is necessary to remove the driving mechanism 4, first disassemble the positioning ring 48, then screw out the screw rod 43 from the rotation hole 125. Subsequently, unscrew the locking part 13 from the plug ring 126, pull the sleeve 3 outwards. The sleeve 3 drives the threaded sleeve 41, and the threaded sleeve 41 drives the rotating ring 42 to slide outwards together, then the driving mechanism 4 can be disassembled; when it is necessary to install the driving mechanism 4, first arrange the first balls 44 in the first rolling grooves 46 of the rotating ring 42, then align the installation cavity 121 with the threaded sleeve 41, insert the threaded sleeve 41 into the installation cavity 121, so that the first rolling grooves 46 of the installation part 12 and the rotating ring 42 cooperate with the first balls 44. Then turn the installation part 12 over 180° upwards, place the second balls 45 in the second rolling grooves 47 of the rotating ring 42, and then screw the locking part 13 onto the plug ring 126, so that the end surface of the locking part 13 is attached to the end surface of the installation part 12. The second rolling grooves 47 of the locking part 13 press the rotating ring 42 against the first rolling shaft through the second balls 45, and the driving mechanism 4 is fixed. Position the sleeve 3, and then screw the screw rod 43 from the rotation hole 125 into the second annular groove 124, so that the screw rod 43 is threadedly engaged with the rotating ring 42, and then fix the positioning ring 48 in the rotation hole 125.

[0030] A first connection ring 111 is connected to the circumferential surface of the bottom of the connection part 11, and a second connection ring 127 is connected to the circumferential surface of the top of the installation part 12. The first connection ring 111 is attached to the second connection ring 127, the bottom surface of the connection part 11 is closely attached to the top surface of the installation part 12, and the first connection ring 111 and the second connection ring 127 are connected by bolts; four positioning columns 112 are connected to the bottom surface of the connection part 11, and the four positioning columns 112 are evenly distributed around the circumference of the connection part 11. Four positioning grooves 128 for inserting the four positioning columns 112 are arranged on the top surface of the installation part 12.

[0031] When the connection part 11 and the installation part 12 are connected, insert the four positioning columns 112 into the four positioning grooves 128. The connection part 11 and the installation part 12 are positioned by the positioning columns 112 and the positioning grooves 128 to keep the axes collinear; then connect the first connection ring 111 and the second connection ring 127 by bolts.

[0032] A first flow channel 51 is provided at the middle position of the connecting portion 11. A first pipeline 52 is arranged in the first flow channel 51. The first pipeline 52 is rotatably connected to the inner wall of the first flow channel 51 through a bearing 521. A piston 522 is connected to the circumferential surface of the bottom of the first pipeline 52. The piston 522 is slidably sealed against the inner wall of the first flow channel 51. A liquid storage tank 53 is arranged on the bottom surface of the installation portion 12. The first flow channel 51 communicates with the liquid storage tank 53. A second flow channel 54 is arranged on the bottom surface of the liquid storage tank 53. The second flow channel 54 communicates with the installation cavity 121. The top surface of the connecting section 21 is connected with a second pipeline 55. The second pipeline 55 is aligned with the second flow channel 54. The second pipeline 55 is pressed against the bottom surface of the connecting portion 11. A third flow channel 56 is arranged at the middle position of the tool body 2. The third flow channel 56 communicates with the second pipeline 55. Two liquid outlet holes 57 communicating with the third flow channel 56 are symmetrically arranged at the bottom end of the tool tip 23.

[0033] When the circumferential surface of the frustum section 221 of the tool body 2 is pressed against the inner circumferential surface of the frustum hole 132 of the locking portion 13, the second pipeline 55 is pressed against the bottom surface of the connecting portion 11. By injecting coolant into the first pipeline 52, the coolant enters the liquid storage tank 53 through the first flow channel 51. The liquid in the liquid storage tank 53 then flows into the second flow channel 54. The coolant in the second flow channel 54 then enters the third flow channel 56 through the second pipeline 55. The coolant in the third flow channel 56 is then ejected through the liquid outlet holes 57. When the tool tip 23 processes a workpiece, the tool tip 23 and the workpiece can be cooled.

[0034] Two symmetrically arranged fourth flow channels 61 are arranged on the top surface of the installation portion 12. One end of the two fourth flow channels 61 communicates with the liquid storage tank 53. Two symmetrically arranged fifth flow channels 62 are vertically arranged in the installation portion 12. The top ends of the two fifth flow channels 62 respectively communicate with one end of the two fourth flow channels 61 far from the liquid storage tank 53. A first annular flow channel 63 is arranged on the bottom surface of the annular slot 133. The bottom end of the fifth flow channel 62 communicates with the first annular flow channel 63. Two symmetrically arranged sixth flow channels 64 are arranged in the locking portion 13. The two sixth flow channels 64 are inclined. The top ends of the sixth flow channels 64 communicate with the first annular flow channel 63. A second annular flow channel 65 is arranged on the circumferential surface of the frustum section 221. The bottom ends of the two sixth flow channels 64 communicate with the second annular flow channel 65. Four inclined seventh flow channels 66 are arranged in the frustum section 221. The four seventh flow channels 66 are evenly distributed around the positioning section 22 in a circumferential direction. The top ends of the seventh flow channels 66 communicate with the second annular flow channel 65. The bottom ends of the seventh flow channels 66 communicate with the bottom surface of the positioning section 22. The bottom ends of the seventh flow channels 66 face the tool tip 23.

[0035] The coolant in the liquid storage tank 53 sequentially enters the first annular flow channel 63 through the fourth flow channel 61 and the fifth flow channel 62. The coolant in the first annular flow channel 63 enters the second annular flow channel 65 through the sixth flow channel 64. The coolant in the second annular flow channel 65 is ejected through the seventh flow channel 66. The coolant ejected from the first flow channel 51 cools the blade body of the tool bit 23.

[0036] On the top surface of the installation part 12, there is a first clamping groove arranged around the fourth flow channel 61 and the liquid storage tank 53. The first sealing ring 71 is embedded in the first clamping groove, and the connecting part 11 presses against the first sealing ring 71. There is a second clamping groove arranged around the bottom end of the second flow channel 54. The second sealing ring 72 is embedded in the second clamping groove, and the top end of the second pipeline 55 presses against the second sealing ring 72. There are a third clamping groove and a fourth clamping groove arranged around the bottom surface of the insertion ring 126. The third clamping groove is located outside the first annular flow channel 63, and the fourth clamping groove is located inside the second annular flow channel 65. The third sealing ring 73 is embedded in the third clamping groove, and the fourth sealing ring 74 is embedded in the fourth clamping groove. The bottom surface of the annular slot 133 presses against the third sealing ring 73 and the fourth sealing ring 74. There are a fifth clamping groove and a sixth clamping groove arranged around the circumferential surface of the frustum-shaped hole 132. The fifth clamping groove is located above the second annular flow channel 65, and the sixth clamping groove is located below the second annular flow channel 65. The fifth sealing ring 75 is embedded in the fifth clamping groove, and the sixth sealing ring 76 is embedded in the sixth clamping groove. The circumferential surface of the frustum-shaped section 221 presses against the fifth sealing ring 75 and the sixth sealing ring 76.

[0037] The implementation principle of a high-precision milling cutter with stable clamping in the embodiment of the present application is as follows: when the cutter body 2 needs to be installed, the connecting section 21 is aligned with the sleeve 3, the positioning plate 211 is aligned with the opening 321, the connecting section 21 is inserted into the sleeve 3, the positioning plate 211 is inserted into the opening 321, and when the positioning plate 211 passes over the retaining ring 32, the cutter body 2 is rotated to rotate the positioning plate 211 to the top surface of the retaining ring 32 until the side surface of the positioning plate 211 is aligned with the side surface of the first limiting plate 31, the driving mechanism 4 drives the sleeve 3 to rise, the sleeve 3 drives the positioning plate 211 to rise through the retaining ring 32, and the positioning plate 211 drives the cutter body 2 to rise, and during the rising process of the sleeve 3, the second limiting plate 122 moves to the side surface of the positioning plate 211 away from the first limiting plate 31 The first limiting plate 31 and the second limiting plate 122 position the positioning plate 211, and the position of the knife body 2 is fixed. The circumferential surface of the cylindrical section 222 of the positioning section 22 fits the inner circumferential surface of the truncated cone hole 132. The truncated cone section 221 is positioned by the locking portion 13, and the truncated cone section 221 is coaxial with the locking portion 13. The truncated cone section 221 and the truncated cone hole 132 are used to realize that the axis of the knife body 2 is colinear with the axis of the knife seat 1, replacing the clamping of the knife body 2 by the spring collet, and the problem of low fixing accuracy of the knife body 2 caused by wear and deformation of the spring collet will not occur. In addition, the first limiting plate 31 and the second limiting plate 122 clamp the positioning plate 211, and the knife body 2 is more firmly positioned, and the knife body 2 will not rotate in the knife seat 1.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-precision milling cutter with stable clamping, characterized in that: The invention comprises a knife seat (1) and a knife body (2), wherein the knife seat (1) comprises a connecting portion (11), a mounting portion (12) and a locking portion (13), wherein the mounting portion (12) is connected to the bottom of the connecting portion (11), and the locking portion (13) is connected to the bottom of the mounting portion (12); a through hole is arranged in the middle of the locking portion (13), and the through hole is divided into a cylindrical hole (131) and a truncated cone hole (132), wherein the cylindrical hole (131) is located above the truncated cone hole (132); the knife body (2) The invention comprises a connecting section (21), a positioning section (22) and a cutter head (23); the positioning section (22) comprises a truncated cone section (221) and a cylindrical section (222); the top surface of the truncated cone section (221) is connected to the bottom surface of the connecting section (21); the circumferential surface of the truncated cone section (221) is in contact with the inner circumferential surface of the truncated cone hole (132); the cylindrical section (222) is connected to the bottom surface of the truncated cone section (221); the top surface of the cutter head (23) is connected to the bottom surface of the cylindrical section (222); the connecting section ( 21) is provided with a sleeve (3) on the outer sleeve, the sleeve (3) slides on the inner wall of the through hole, the connecting section (21) is symmetrically connected to two positioning plates (211) on the circumference, and the inner circumference of the sleeve (3) is symmetrically connected to two first limiting plates (31); the mounting portion (12) is provided with a mounting cavity (121) connected to the cylindrical hole (131), the top surface of the mounting cavity (121) is connected to two second limiting plates (122) symmetrically arranged with respect to the connecting section (21), and the positioning plates (211) are connected to the inner circumference of the sleeve (3). ) is located between the first limit plate (31) and the second limit plate (122); a retaining ring (32) is connected to the inner wall of the bottom end of the sleeve (3); an opening (321) is provided on the inner circumference of the retaining ring (32) for the two positioning plates (211) to pass through; the two side surfaces of the positioning plate (211) are respectively attached to the side surfaces of the first limit plate (31) and the second limit plate (122); a sliding drive mechanism (4) for driving the sleeve (3) is installed in the installation cavity (121).

2. A high-precision milling cutter with stable clamping according to claim 1, characterized in that: The driving mechanism (4) comprises a threaded sleeve (41), a rotating ring (42) and a screw (43); the threaded sleeve (41) is sleeved on the outer circumferential surface of the sleeve (3); the threaded sleeve (41) is located in the mounting cavity (121); the outer circumferential surface of the top end of the sleeve (3) has a thread; the inner circumferential surface of the threaded sleeve (41) is threadedly driven with the top end of the sleeve (3); the rotating ring (42) is connected to the outer circumferential surface of the threaded sleeve (41); and the inner wall of the mounting cavity (121) is provided with a first annular groove for the rotating ring (42) to rotate. (123); a second annular groove (124) is arranged on the inner wall of the first annular groove (123); a rotating hole (125) is arranged on the circumferential surface of the mounting portion (12); the rotating hole (125) is communicated with the second annular groove (124); the screw rod (43) is rotatably arranged in the rotating hole (125); a plurality of inclined grooves (421) uniformly distributed along the circumference of the rotating ring (42) are arranged on the circumferential surface of the rotating ring (42); the thread on the screw rod (43) cooperates with the inclined groove (421) of the rotating ring (42).

3. A high-precision milling cutter with stable clamping according to claim 2, characterized in that: A plurality of first rolling balls (44) are evenly arranged around the circumference of the top surface of the rotating ring (42), and a plurality of second rolling balls (45) are evenly arranged around the circumference of the bottom surface of the rotating ring (42); a first rolling groove (46) for the first rolling balls (44) to roll is arranged on the top surface of the first annular groove (123) and the top surface of the rotating ring (42), and a second rolling groove (47) for the second rolling balls (45) to roll is arranged on the bottom surface of the first annular groove (123) and the bottom surface of the rotating ring (42).

4. A high-precision milling cutter with stable clamping according to claim 2, characterized in that: The end face of the screw rod (43) is provided with a hexagonal groove (431), and the hexagonal groove (431) is for inserting a hexagonal wrench. The inner wall of the rotating hole (125) is provided with a positioning ring (48), and the end face of the positioning ring (48) is in contact with the end face of the screw rod (43). The end face of the positioning ring (48) away from the screw rod (43) is connected to an arc plate (49), and the arc plate (49) is detachably connected to the outer peripheral surface of the mounting portion (12).

5. The high-precision milling cutter with stable clamping according to claim 1, characterized in that: The mounting cavity (121) is connected to the bottom surface of the mounting portion (12); the top surface of the locking portion (13) is provided with an annular slot (133) arranged around the circumference of the locking portion (13); the bottom surface of the mounting portion (12) is connected with an insert ring (126) for inserting into the annular slot (133); the top surface of the locking portion (13) is in contact with the bottom surface of the mounting portion (12); the outer peripheral surface of the insert ring (126) is threadedly connected to the outermost inner wall of the annular slot (133).

6. The high-precision milling cutter with stable clamping according to claim 1, characterized in that: The bottom circumference of the connecting portion (11) is connected to a first connecting ring (111), and the top circumference of the mounting portion (12) is connected to a second connecting ring (127); the first connecting ring (111) is attached to the second connecting ring (127), the bottom surface of the connecting portion (11) is tightly attached to the top surface of the mounting portion (12), and the first connecting ring (111) and the second connecting ring (127) are detachably connected.

7. A high-precision milling cutter with stable clamping according to claim 6, characterized in that: The bottom surface of the connecting portion (11) is connected to a plurality of positioning columns (112), the plurality of positioning columns (112) are evenly distributed around the circumference of the connecting portion (11), and the top surface of the mounting portion (12) is provided with a plurality of positioning grooves (128) for the plurality of positioning columns (112) to be inserted into.

8. The high-precision milling cutter with stable clamping according to claim 5, characterized in that: The connecting portion (11) is provided with a first flow channel (51), a first pipe (52) is rotatably connected to the first flow channel (51), a piston (522) is connected to the bottom circumference of the first pipe (52), and the piston (522) is slidably sealed to the inner wall of the first flow channel (51); a liquid storage tank (53) is provided on the bottom surface of the mounting portion (12), and the first flow channel (51) is connected to the liquid storage tank (53); a second flow channel (54) is provided on the bottom surface of the liquid storage tank (53), and the second flow channel (54) is connected to the bottom surface of the liquid storage tank (53). The connecting section (21) has a second flow channel (54) connected to the mounting cavity (121); the top surface of the connecting section (21) is connected to a second pipeline (55), the second pipeline (55) is aligned with the second flow channel (54), the second pipeline (55) is pressed against the bottom surface of the connecting portion (11), a third flow channel (56) is arranged in the blade body (2), the third flow channel (56) is connected to the second pipeline (55), and the bottom end of the blade head (23) is provided with a liquid outlet (57) connected to the third flow channel (56).

9. A high-precision milling cutter with stable clamping according to claim 8, characterized in that: The top surface of the mounting portion (12) is provided with a fourth flow channel (61), one end of which is connected to the liquid storage tank (53); a fifth flow channel (62) is vertically provided in the mounting portion (12), the top end of which is respectively connected to one end of the fourth flow channel (61) away from the liquid storage tank (53); the bottom surface of the annular slot (133) is provided with a first annular flow channel (63), the bottom end of the fifth flow channel (62) is connected to the first annular flow channel (63); the locking portion ( A sixth flow channel (64) is provided in the truncated cone section (221), and the top end of the sixth flow channel (64) is connected to the first annular flow channel (63); a second annular flow channel (65) is provided on the circumferential surface of the truncated cone section (221), and the bottom end of the sixth flow channel (64) is connected to the second annular flow channel (65); a seventh flow channel (66) is provided in the truncated cone section (221), and the top end of the seventh flow channel (66) is connected to the second annular flow channel (65), and the bottom end of the seventh flow channel (66) is connected to the bottom surface of the positioning section (22), and the bottom end of the seventh flow channel (66) faces the cutter head (23).

10. The high-precision milling cutter with stable clamping according to claim 1, characterized in that: The top end of the side surface of the positioning plate (211) close to the second limiting plate (122) is chamfered, and the bottom end of the side surface of the second limiting plate (122) close to the positioning plate (211) is chamfered, and the chamfer of the positioning plate (211) and the chamfer of the second limiting plate (122) are in close contact.

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