A high-precision milling cutter with stable clamping

Abstract

The present application relates to the technical field of machining tools, and specifically discloses a high-precision milling cutter with stable clamping, which includes a cutter seat and a cutter body, wherein the cutter seat includes a connecting portion, a mounting portion connected to the bottom surface of the connecting portion, and a locking portion connected to the bottom surface of the mounting portion; a through hole is provided in the middle position of the locking portion, and the through hole is divided into a cylindrical hole and a frustum hole; the cutter body includes a connecting section, a positioning section, and a cutter head, wherein the positioning section includes a frustum section connected to the bottom surface of the connecting section and a cylindrical section connected to the top surface of the cutter head, and the circumference of the frustum section is in contact with the inner circumference of the frustum hole; a sleeve is provided on the outer surface of the connecting section, a positioning plate is connected to the circumference of the connecting section, and a first limiting plate is connected to the inner circumference of the sleeve; an installation cavity is provided in the mounting portion, and a second limiting plate is connected to the top surface of the installation cavity; a retaining ring is connected to the inner wall of the bottom end of the sleeve, and an opening for the positioning plate to pass through is provided on the inner circumference of the retaining ring; a driving mechanism for driving the sleeve to slide is installed in the mounting cavity. The present application has the effect of improving the machining accuracy of workpieces.

Description

Technical Field

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

[0002] A milling cutter is a rotating tool with one or more teeth used for milling. Each tooth sequentially and intermittently removes the workpiece's excess material. Milling cutters are primarily used on milling machines to create flat surfaces, steps, grooves, formed surfaces, and cut-off parts.

[0003] In the related art, a spring collet is required to clamp and fix the milling cutter. When the traditional milling cutter is fixed and installed, the spring collet is first installed in the nut sleeve, and then the milling cutter shank is inserted into the spring collet, and then the nut sleeve is screwed onto the spindle. Then two wrenches are used, one of which is clamped on the spindle and the other is clamped on the nut. The spindle wrench is fixed and the nut wrench is turned. During the process of tightening the nut, the spindle gradually contracts the spring collet, and the spring collet gradually clamps the milling cutter shank.

[0004] In milling cutter processing, especially in precision parts processing, the axis of the milling cutter and the axis of the spindle need to be collinear, so that the processed parts have higher precision; but since the clamping of the milling cutter needs to be coordinated with the spring collet, it is inevitable that the spring collet will be used frequently during the use of the spring collet. The spring collet is used in some harsh environments, such as humid, extreme temperature or corrosive environments, and the force applied during use is large. These methods will cause the spring collet to wear, age, and deform, making the spring collet's clamping of the milling cutter unstable, causing the milling cutter axis and the spindle axis to deviate, resulting in reduced part processing accuracy. Summary of the Invention

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

[0006] The present application provides a high-precision milling cutter with stable clamping, which adopts the following technical solution:

[0007] A high-precision milling cutter with stable clamping comprises a cutter seat and a cutter body, the cutter seat comprises 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 in the middle position of the locking portion, and the through hole is divided into a cylindrical hole and a frustum hole, and the cylindrical hole is located above the frustum hole; the cutter body comprises a connecting section, a positioning section and a cutter head, the positioning section comprises a frustum section and a cylindrical section, the top surface of the frustum section is connected to the bottom surface of the connecting section, the circumference of the frustum section is fitted with the inner circumference of the frustum hole, the cylindrical section is connected to the bottom surface of the frustum section, and the top surface of the cutter head is connected to the bottom surface of the cylindrical section; the outer sleeve of the connecting section A sleeve is provided, which slides on the inner wall of the through hole, and two positioning plates are symmetrically connected to the circumference of the connecting section, and two first limit plates are symmetrically connected to the inner circumference of the sleeve; a mounting cavity connected to the cylindrical hole is provided in the mounting portion, and two second limit plates symmetrically arranged about the connecting section are connected to the top surface of the mounting cavity, and the positioning plate is located between the first limit plate and the second limit plate; a retaining ring is connected to the inner wall of the bottom end of the sleeve, and an opening for the two positioning plates to pass through is provided on the inner circumference of the retaining ring, and the two side surfaces of the positioning plate are respectively attached to the side surfaces of the first limit plate and the second limit plate; a driving mechanism for driving the sleeve to slide is installed in the mounting cavity.

[0008] Optionally, the driving mechanism includes a threaded sleeve, a rotating ring and a screw, the threaded sleeve is sleeved on the outer circumferential surface of the sleeve, the threaded sleeve is located in the mounting cavity, the outer circumferential surface of the top end of the sleeve has a thread, the inner circumferential surface of the threaded sleeve is threaded with the top end of the sleeve, the rotating ring is connected to the outer circumferential surface of the threaded sleeve, the inner wall of the mounting cavity is provided with a first annular groove for the rotating ring to rotate; the inner wall of the first annular groove is provided with a second annular groove, the circumferential surface of the mounting part is provided with a rotating hole, the rotating hole is connected with the second annular groove, the screw is rotatably arranged in the rotating hole, the circumferential surface of the rotating ring is provided with a plurality of oblique grooves evenly distributed along the circumference of the rotating ring, and the threads on the screw cooperate with the oblique grooves of the rotating ring.

[0009] Optionally, a plurality of first balls are evenly arranged around the circumference of the top surface of the rotating ring, and a plurality of second balls are evenly arranged around the circumference of the bottom surface of the rotating ring; the top surface of the first annular groove and the top surface of the rotating ring are provided with first rolling grooves for the first balls to roll, and the bottom surface of the first annular groove and the bottom surface of the rotating ring are provided with second rolling grooves for the second balls to roll.

[0010] Optionally, a hexagonal groove is provided on the end face of the screw for inserting a hexagonal wrench, a positioning ring is provided on the inner wall of the rotating hole, the end face of the positioning ring is fitted against the end face of the screw, and the positioning ring is connected to an arc-shaped plate away from the end face of the screw, and the arc-shaped plate is detachably connected to the outer peripheral surface of the mounting portion.

[0011] Optionally, the mounting cavity is connected to the bottom surface of the mounting portion, the top surface of the locking portion is provided with an annular slot arranged around the circumference of the locking portion, the bottom surface of the mounting portion is connected with an insert ring for inserting into the annular slot, the top surface of the locking portion is fitted to the bottom surface of the mounting portion, and the outer peripheral surface of the insert ring is threadedly connected to the outermost inner wall of the annular slot.

[0012] Optionally, a first connecting ring is connected to the bottom circumference of the connecting part, and a second connecting ring is connected to the top circumference of the mounting part. The first connecting ring is attached to the second connecting ring, the bottom surface of the connecting part is tightly attached to the top surface of the mounting part, and the first connecting ring and the second connecting ring are detachably connected.

[0013] Optionally, the bottom surface of the connecting portion is connected to a plurality of positioning posts, which are evenly distributed around the circumference of the connecting portion, and the top surface of the mounting portion is provided with a plurality of positioning grooves for inserting the plurality of positioning posts.

[0014] Optionally, a first flow channel is provided in the connecting portion, a first pipe is rotatably connected in the first flow channel, a piston is connected to the bottom circumference of the first pipe, and the piston is slidably sealed to the inner wall of the first flow channel; a liquid storage tank is provided on the bottom surface of the mounting portion, and the first flow channel is connected to the liquid storage tank; a second flow channel is provided on the bottom surface of the liquid storage tank, and the second flow channel is connected to the mounting cavity; a second pipe is connected to the top surface of the connecting section, the second pipe is aligned with the second flow channel, and the second pipe is pressed against the bottom surface of the connecting portion; a third flow channel is provided in the blade body, the third flow channel is connected to the second pipe, and the bottom end of the blade head is provided with a liquid outlet connected to the third flow channel.

[0015] Optionally, a fourth flow channel is provided on the top surface of the mounting portion, and one end of the fourth flow channel is connected to the liquid storage tank; a fifth flow channel is vertically provided in the mounting portion, and the top end of the fifth flow channel is respectively connected to one end of the fourth flow channel away from the liquid storage tank; a first annular flow channel is provided on the bottom surface of the annular slot, and the bottom end of the fifth flow channel is connected to the first annular flow channel; a sixth flow channel is provided in the locking portion, and the top end of the sixth flow channel is connected to the first annular flow channel; a second annular flow channel is provided on the circumferential surface of the frustum section, and the bottom end of the sixth flow channel is connected to the second annular flow channel; a seventh flow channel is provided in the frustum section, the top end of the seventh flow channel is connected to the second annular flow channel, the bottom end of the seventh flow channel is connected to the bottom surface of the positioning section, and the bottom end of the seventh flow channel faces the cutter head.

[0016] Optionally, the top end of the side surface of the positioning plate close to the second limiting plate is chamfered, and 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 in contact with each other.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. When the cutter body needs to be installed, align the connecting section with the casing, align the positioning plate with the opening, insert the connecting section into the casing, and insert the positioning plate into the opening. When the positioning plate passes over the retaining ring, rotate the cutter body to rotate the positioning plate to the top surface of the retaining ring until the side surface of the positioning plate is aligned with the side surface of the first limiting plate. The driving mechanism drives the casing to rise, and the casing drives the positioning plate to rise through the retaining ring, and the positioning plate drives the cutter body to rise. During the rising process of the casing, the second limiting plate moves to the side surface where the positioning plate is away from the first limiting plate, and the first limiting plate and the second limiting plate will position the casing. The plate is positioned, the position of the cutter body is fixed, the circumference of the cylindrical section of the positioning section is fitted to the inner circumference of the truncated cone hole, the truncated cone section is positioned by the locking portion, and the truncated cone section is coaxial with the locking portion. The truncated cone section and the truncated cone hole are used to realize that the axis of the cutter body and the axis of the cutter seat are colinear, replacing the spring collet clamping the cutter body, and the problem of low cutter body fixing accuracy caused by wear and deformation of the spring collet will not occur. In addition, the first limiting plate and the second limiting plate clamp the positioning plate, so that the cutter body is more firmly positioned, and the cutter body will not rotate in the cutter seat.

[0019] 2. When the casing needs to be driven up or down, the screw is driven to rotate. The screw pushes the rotating ring through the thread to rotate the inclined groove on the circumferential surface. The screw can drive the rotating ring to rotate, and the rotating ring drives the threaded sleeve to rotate. The threaded sleeve drives the casing to move up or down, thus driving the casing to move up or down;

[0020] 3. When the circumference of the cone section of the cutter body is pressed against the inner circumference of the cone 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 reservoir through the first flow channel, and the liquid in the liquid reservoir flows into the second flow channel. The coolant in the second flow channel enters the third flow channel through the second pipe, and the coolant in the third flow channel is ejected through the liquid outlet. When the cutter head is processing the workpiece, the cutter head and the workpiece can be cooled.

[0021] 4. The coolant in the liquid storage tank enters the first annular flow channel through the fourth flow channel and the fifth flow channel in turn. The coolant in the first annular flow channel enters the second annular flow channel through the sixth flow channel. 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 of the cutter head. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a high-precision milling cutter according to an embodiment of the present application;

[0023] Figure 2 Schematic diagram of the exploded structure of the high-precision milling cutter according to an embodiment of the present application;

[0024] Figure 3Schematic diagram of the cross-sectional structure of the knife holder according to the embodiment of the present application;

[0025] Figure 4 This is a schematic structural diagram of the blade body according to an embodiment of the present application;

[0026] Figure 5 This is a schematic diagram of the exploded structure of the driving mechanism of an embodiment of the present application;

[0027] Figure 6 This is a schematic structural diagram of the top end of the casing according to an embodiment of the present application;

[0028] Figure 7 This is a schematic structural diagram of the bottom end of the casing according to an embodiment of the present application;

[0029] Figure 8 Schematic diagram of the cross-sectional structure of the knife holder and the knife body according to an embodiment of the present application;

[0030] Figure 9 yes Figure 8 Schematic diagram of the enlarged structure of part A.

[0031] Description of reference numerals:

[0032] 1. Cutter holder; 11. Connecting portion; 111. First connecting ring; 112. Positioning column; 12. Mounting portion; 121. Mounting cavity; 122. Second limiting plate; 123. First annular groove; 124. Second annular groove; 125. Rotating hole; 126. Insert ring; 127. Second connecting ring; 128. Positioning groove; 13. Locking portion; 131. Cylindrical hole; 132. Cone hole; 133. Annular slot; 2. Cutter body; 21. Connecting section; 211. Positioning plate; 22. Positioning section; 221. Cone section; 222. Cylindrical section; 23. Cutter head; 3. Sleeve; 31. First limiting plate; 32. Retaining ring; 321. Opening; 4. Driving mechanism; 41. Threaded sleeve; 42. Rotating ring; 42 1. 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 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; 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 DESCRIPTION

[0033] The following is combined with Figure 1-9 This application is described in further detail.

[0034] The embodiment of the present application discloses a high-precision milling cutter with stable clamping. Figure 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 installed 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 in the middle of the locking portion 13. The through hole is divided into a cylindrical hole 131 and a frustum hole 132. The cylindrical hole 131 is located above the frustum hole 132. The frustum hole 132 is located at the bottom of the frustum hole 132. The bottom diameter is larger than the diameter of the cylindrical hole 131; the blade body 2 includes a connecting section 21, a positioning section 22 and a blade head 23, the positioning section 22 includes a truncated cone section 221 and a cylindrical section 222, the top surface of the truncated cone section 221 is coaxially connected to the bottom surface of the connecting section 21, the circumference of the truncated cone section 221 is in contact with the inner circumference of the truncated cone hole 132, the cylindrical section 222 is coaxially connected to the bottom surface of the truncated cone section 221, the top surface of the blade head 23 is coaxially connected to the bottom surface of the cylindrical section 222, and the truncated cone section 2 The diameter of the top surface 21 is larger than the diameter of the connecting section 21 and the cutter head 23; the connecting section 21 is outerly provided with a sleeve 3, and the sleeve 3 slides on the inner wall of the through hole, and 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 limit plates 31; a mounting cavity 121 connected to the cylindrical hole 131 is provided in the mounting portion 12, and the top surface of the mounting cavity 121 is connected to two second limit plates 122 symmetrically arranged about the connecting section 21, and the positioning plate 211 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, the first limit plate 31 is connected to the top surface of the retaining ring 32, and the inner circumference of the retaining ring 32 is provided with an opening 321 for the two positioning plates 211 to pass through, and 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 driving mechanism 4 for driving the sleeve 3 to slide is installed in the mounting cavity 121.

[0035] When the cutter 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 cutter body 2 so that the positioning plate 211 rotates 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, and the sleeve 3 drives the positioning plate 211 to rise through the retaining ring 32. The positioning plate 211 drives the cutter 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, and the first limiting plate 31 and the second limiting plate 31 are in contact with each other. The positioning plate 122 positions the positioning plate 211, and the position of the knife body 2 is fixed. The circumference of the cylindrical section 222 of the positioning section 22 fits against the inner circumference of the conical hole 132. The conical section 221 is positioned by the locking portion 13, and the conical section 221 is coaxial with the locking portion 13. The conical section 221 and the conical hole 132 are used to realize that the axis of the knife body 2 and the axis of the knife seat 1 are colinear, replacing the spring collet clamping the knife body 2. The problem of low fixing accuracy of the knife body 2 due to wear and deformation of the spring collet will not occur. In addition, the first limit plate 31 and the second limit plate 122 clamp the positioning plate 211, so that the knife body 2 is positioned more firmly, and the knife body 2 will not rotate in the knife seat 1.

[0036] When the second stop plate 122 is lifted, the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate 122 is lifted and the second stop plate

[0037] The driving mechanism 4 includes a threaded sleeve 41, a rotating ring 42 and a screw 43. The mounting cavity 121 is cylindrical. The threaded sleeve 41 is sleeved on the outer circumference of the sleeve 3 and is located in the mounting cavity 121. The outer circumference of the top end of the sleeve 3 has a thread. The inner circumference of the threaded sleeve 41 is threaded with the top end of the sleeve 3. The rotating ring 42 is coaxially connected to the outer circumference of the threaded sleeve 41. The inner wall of the mounting 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, and the circumference of the mounting portion 12 is provided with a rotating hole 125, which is connected to the second annular groove 124. The screw 43 is rotatably arranged in the rotating hole 125. The circumference of the rotating ring 42 is provided with a plurality of oblique grooves 421 evenly distributed along the circumference of the rotating ring 42. The threads on the screw 43 cooperate with the oblique grooves 421 of the rotating ring 42.

[0038] When it is necessary to drive the sleeve 3 to rise or fall, the screw 43 is driven to rotate. The screw 43 pushes the inclined groove 421 on the circumference of the rotating ring 42 through the thread. The screw 43 can drive the rotating ring 42 to rotate. The rotating ring 42 drives the threaded sleeve 41 to rotate. The threaded sleeve 41 drives the sleeve 3 to rise or fall, thereby driving the sleeve 3 to rise or fall.

[0039] 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.

[0040] 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 via the first balls 44 and the second balls 45 , thereby reducing the friction generated by the rotation of the rotating ring 42 .

[0041] A hexagonal groove 431 is provided on the end face of the screw 43, and the hexagonal groove 431 is for inserting a hexagonal wrench. A positioning ring 48 is provided on the inner wall of the rotating hole 125, and the end face of the positioning ring 48 is fitted with the end face of the screw 43. The end face of the positioning ring 48 away from the screw 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; when it is necessary to drive the screw 43 to rotate, the hexagonal wrench is inserted into the rotating hole 125, and the hexagonal wrench passes through the positioning ring 48 and enters the hexagonal groove 431. The hexagonal wrench rotates the screw 43, and the screw 43 rotates 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.

[0042] The mounting cavity 121 is connected to the bottom surface of the mounting portion 12, and 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 to an insert ring 126 for inserting into the annular slot 133. The top surface of the locking portion 13 is attached to the bottom surface of the mounting portion 12, and the outer peripheral surface of the insert ring 126 is threadedly connected to the outermost inner wall of the annular slot 133.

[0043] When the driving mechanism 4 needs to be taken out, the positioning ring 48 is first disassembled, and then the screw 43 is screwed out of the rotating hole 125, and then the locking part 13 is unscrewed from the insert ring 126, and the sleeve 3 is pulled outward. The sleeve 3 drives the threaded sleeve 41, and the threaded sleeve 41 drives the rotating ring 42 to slide out together, and the driving mechanism 4 can be removed; when the driving mechanism 4 needs to be installed, the first ball 44 is first arranged in the first rolling groove 46 of the rotating ring 42, and then the installation cavity 121 is aligned with the threaded sleeve 41, and the threaded sleeve 41 is inserted into the installation cavity 121, so that the first rolling groove 46 of the installation part 12 and the first rolling groove of the rotating ring 42 are aligned. 46 cooperates with the first ball 44, then turns the mounting part 12 180 degrees upward, and then places the second ball 45 in the second rolling groove 47 of the rotating ring 42, and then screws the locking part 13 on the insert ring 126 so that the end face of the locking part 13 fits the end face of the mounting part 12. The second rolling groove 47 of the locking part 13 presses the rotating ring 42 onto the first roller through the second ball 45, and the driving mechanism 4 is fixed, and the positioning sleeve 3 is then screwed from the rotating hole 125 into the second annular groove 124, so that the screw 43 is threadedly matched with the rotating ring 42, and then the positioning ring 48 is fixed in the rotating hole 125.

[0044] The bottom circumference of the connecting part 11 is connected to the first connecting ring 111, and the top circumference of the mounting part 12 is connected to the second connecting ring 127. The first connecting ring 111 is fitted to the second connecting ring 127, and the bottom surface of the connecting part 11 is tightly attached to the top surface of the mounting part 12. The first connecting ring 111 and the second connecting ring 127 are connected by bolts; four positioning columns 112 are connected to the bottom surface of the connecting part 11, and the four positioning columns 112 are evenly distributed around the circumference of the connecting part 11. The top surface of the mounting part 12 is provided with four positioning grooves 128 for the four positioning columns 112 to be inserted.

[0045] When the connecting part 11 and the mounting part 12 are connected, the four positioning columns 112 are inserted into the four positioning grooves 128. The connecting part 11 and the mounting part 12 are positioned by the positioning columns 112 and the positioning grooves 128 to keep the axes collinear; then the first connecting ring 111 and the second connecting ring 127 are connected by bolts.

[0046] A first flow channel 51 is provided in the middle position of the connecting part 11, and a first pipe 52 is provided in the first flow channel 51. The first pipe 52 is rotatably connected to the inner wall of the first flow channel 51 through a bearing 521. The bottom circumference of the first pipe 52 is connected to a piston 522, and the piston 522 is slidably sealed on the inner wall of the first flow channel 51; a liquid storage tank 53 is provided on the bottom surface of the mounting part 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 mounting cavity 121; a second pipe 55 is connected to the top surface of the connecting section 21, and the second pipe 55 is aligned with the second flow channel 54, and the second pipe 55 is pressed against the bottom surface of the connecting part 11; a third flow channel 56 is provided in the middle position of the blade body 2, and the third flow channel 56 is connected to the second pipe 55, and two liquid outlet holes 57 connected to the third flow channel 56 are symmetrically provided at the bottom end of the blade head 23.

[0047] When the circumferential surface of the conical section 221 of the cutter body 2 is pressed against the inner circumferential surface of the conical hole 132 of the locking portion 13, the second pipe 55 is pressed against the bottom surface of the connecting portion 11. By injecting coolant into the first pipe 52, the coolant enters the liquid reservoir 53 through the first flow channel 51, and the liquid in the liquid reservoir 53 flows into the second flow channel 54. The coolant in the second flow channel 54 enters the third flow channel 56 through the second pipe 55, and the coolant in the third flow channel 56 is ejected through the liquid outlet 57. When the cutter head 23 processes the workpiece, the cutter head 23 and the workpiece can be cooled.

[0048] Two symmetrically arranged fourth flow channels 61 are provided on the top surface of the mounting portion 12, and one end of the two fourth flow channels 61 is connected to the liquid storage tank 53; two symmetrically arranged fifth flow channels 62 are vertically provided in the mounting portion 12, and the top ends of the two fifth flow channels 62 are respectively connected to the ends of the two fourth flow channels 61 away from the liquid storage tank 53; a first annular flow channel 63 is provided on the bottom surface of the annular slot 133, and the bottom end of the fifth flow channel 62 is connected to the first annular flow channel 63; two symmetrically arranged sixth flow channels 64 are provided in the locking portion 13, and the two sixth flow channels 64 are connected to the liquid storage tank 53; The flow channel 64 is arranged at an angle, 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 arranged on the circumferential surface of the conical section 221, and the bottom ends of the two sixth flow channels 64 are connected to the second annular flow channel 65; four inclined seventh flow channels 66 are arranged in the conical section 221, and the four seventh flow channels 66 are evenly distributed around the circumference of the positioning section 22, the top end of the seventh flow channel 66 is connected to the second annular flow channel 65, 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.

[0049] The coolant in the liquid storage tank 53 enters the first annular flow channel 63 through the fourth flow channel 61 and the fifth flow channel 62 in turn. 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 of the cutter head 23.

[0050] The top surface of the mounting portion 12 is provided with a first card groove arranged around the fourth flow channel 61 and the liquid storage tank 53, and a first sealing ring 71 is embedded in the first card groove, and the connecting portion 11 is pressed tightly against the first sealing ring 71; a second card groove is provided around the bottom end of the second flow channel 54, and a second sealing ring 72 is embedded in the second card groove, and the top end of the second pipe 55 is pressed tightly against the second sealing ring 72; a third card groove and a fourth card groove are provided around the bottom surface of the insert ring 126, and the third card groove is located on the outside of the first annular flow channel 63, and the fourth card groove is located on the inside of the second annular flow channel 65 A third sealing ring 73 is embedded in the third slot, a fourth sealing ring 74 is embedded in the fourth slot, and the bottom surface of the annular slot 133 is pressed tightly against the third sealing ring 73 and the fourth sealing ring 74; a fifth slot and a sixth slot are arranged around the circumference of the frustum hole 132, the fifth slot is located above the second annular flow channel 65, and the sixth slot is located below the second annular flow channel 65, the fifth slot is embedded in the fifth sealing ring 75, the sixth slot is embedded in the sixth sealing ring 76, and the circumference of the frustum section 221 is pressed tightly against the fifth sealing ring 75 and the sixth sealing ring 76.

[0051] 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, and the positioning plate 211 is inserted into the opening 321. When the positioning plate 211 passes over the retaining ring 32, the cutter body 2 is rotated so that the positioning plate 211 is rotated 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, and the sleeve 3 drives the positioning plate 211 to rise through the retaining ring 32. The positioning plate 211 drives the cutter 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, and the position of the knife body 2 is fixed. The circumference of the cylindrical section 222 of the positioning section 22 fits the inner circumference of the conical hole 132. The conical section 221 is positioned by the locking portion 13, and the conical section 221 is coaxial with the locking portion 13. The conical section 221 and the conical 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 spring collet clamping the knife body 2. The problem of low fixing accuracy of the knife body 2 due to wear and deformation of the spring collet will not occur. In addition, through the clamping of the positioning plate 211 by the first limiting plate 31 and the second limiting plate 122, the knife body 2 is positioned more firmly, and the knife body 2 will not rotate in the knife seat 1.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A high-precision milling cutter with stable clamping, characterized by: The present 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 provided 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 cutting head (23), wherein 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), and the top surface of the cutting head (23) is connected to the bottom surface of the cylindrical section (222); the connecting section ( 21) The outer sleeve is provided with a sleeve (3), the sleeve (3) slides on the inner wall of the through hole, the connecting section (21) is symmetrically connected to two positioning plates (211), 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 about the connecting section (21), the positioning plates (211 ) is located between the first limiting plate (31) and the second limiting 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 plates (211) are respectively attached to 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); 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 peripheral surface of the sleeve (3); the threaded sleeve (41) is located in the mounting cavity (121); the outer peripheral surface of the top end of the sleeve (3) has a thread; the inner peripheral 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 peripheral 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 provided on the inner wall of the first annular groove (123); a rotating hole (125) is provided on the circumferential surface of the mounting portion (12); the rotating hole (125) is communicated with the second annular groove (124); the screw (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 provided on the circumferential surface of the rotating ring (42); the threads on the screw (43) cooperate with the inclined grooves (421) of the rotating ring (42).

2. A high-precision milling cutter with stable clamping according to claim 1, 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 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 rolling 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).

3. The high-precision milling cutter with stable clamping according to claim 1, 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) is away from the end face of the screw rod (43) and is connected to an arc plate (49). The arc plate (49) is detachably connected to the outer peripheral surface of the mounting portion (12).

4. 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).

5. 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), and the bottom surface of the connecting portion (11) is tightly attached to the top surface of the mounting portion (12). The first connecting ring (111) and the second connecting ring (127) are detachably connected.

6. The high-precision milling cutter with stable clamping according to claim 5, characterized in that: The bottom surface of the connecting portion (11) is connected to a plurality of positioning columns (112), and the plurality of positioning columns (112) are evenly distributed around the circumference of the connecting portion (11). The top surface of the mounting portion (12) is provided with a plurality of positioning grooves (128) for inserting the plurality of positioning columns (112).

7. The high-precision milling cutter with stable clamping according to claim 4, 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 second flow channel (54) is connected to the installation cavity (121); the top surface of the connecting section (21) is connected to a second pipe (55), the second pipe (55) is aligned with the second flow channel (54), the second pipe (55) is pressed against the bottom surface of the connecting portion (11), a third flow channel (56) is provided in the blade body (2), the third flow channel (56) is connected to the second pipe (55), and the bottom end of the blade head (23) is provided with a liquid outlet (57) connected to the third flow channel (56).

8. The high-precision milling cutter with stable clamping according to claim 7, 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 ( 13) is provided with a sixth flow channel (64), 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 frustum section (221), 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 frustum section (221), the top end of the seventh flow channel (66) is connected to the second annular flow channel (65), 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).

9. 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 contact with each other.

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