Symmetrical drilling tool bit and milling equipment thereof

Abstract

The invention relates to the technical field of milling machining, in particular to a symmetrical drilling tool bit and milling equipment thereof.The tool body of the symmetrical drilling tool bit is composed of a tool bar, a tool apron, a blade groove and a blade, the blade is of a triangular hexagonal structure, and chip dividing grooves distributed in a staggered mode are formed in the circumferential side of the blade; the surface of the blade is provided with the chip breaker groove which is arranged in a closed-loop mode, the chip breaker groove is internally and fixedly provided with the chip ejecting point, and the symmetrical drilling tool bit does not vibrate during milling and can effectively conduct chip breaking; the lifting part of the milling equipment comprises the cutter mounting mechanism and the lifting mechanism, and the machining part comprises the feeding mechanism, the deflection mechanism used for intermittently pushing the workpieces and the workpiece clamping mechanism used for clamping and fixing the workpieces. And automatic clamping, drilling and automatic feeding of the workpieces are completed, the whole machining process is fully automatic, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of milling processing, in particular to a symmetrical drill bit and a milling device thereof. BACKGROUND

[0002] In the process of mechanical drilling and milling, the milling cutter is often rotated at high speed to realize drilling and milling of the workpiece or object.

[0003] The prior art discloses a symmetrical blade high-efficiency fast drill, and discloses a drill bit body with a connecting head, a guide drill is arranged at the top end of the drill bit body, and a blade is arranged at the edge of the top end of the drill bit body, through the symmetrical double-blade design, drilling is fast and efficient.

[0004] However, the prior art still has certain defects, that is, in the use process, the cutting edge of the blade is designed in a circular arc, which is easy to cause the drill to shake during the milling process, the milling resistance is large, and the chip breaking cannot be effectively performed.

[0005] The prior art discloses a manifold milling and drilling processing equipment, and discloses a cylinder, an arc block, a transverse block and a supporting mechanism, the cylinder can drive the arc block to move transversely to realize clamping and positioning of the manifold, the transverse block is used to support the bottom of the manifold, and the supporting mechanism is used to support the transverse block during the movement of the transverse block, thereby improving the stability of the transverse block supporting the manifold.

[0006] However, the prior art still has certain defects, that is, in the use process, the clamping and positioning of the workpiece cannot be directly in place in one step during the milling process, and manual material changing is required after completing single processing, which reduces the processing efficiency. SUMMARY

[0007] The present application aims to provide a symmetrical drill bit and a milling device thereof to solve the problems in the background art.

[0008] The purpose of the present application can be achieved by the following technical solutions:

[0009] A symmetrical drill bit, the drill bit comprising:

[0010] A tool body, the tool body comprising a tool rod, a tool holder fixed at one end of the tool rod, two blade grooves arranged at the other end of the tool rod, and a blade detachably installed in the blade groove, the two blade grooves being centrally symmetrically arranged about the axis of the tool rod;

[0011] A leakage groove penetrating the knife seat is provided at the axis of the knife rod, and leakage holes communicating with the leakage groove are provided at the positions of the two blades at the end of the knife rod;

[0012] The blade is arranged in a triangular hexagonal structure, a plurality of staggered chip dividing grooves are provided on the circumferential side of the blade, and a chip breaker groove arranged in a closed loop is provided on the surface of the blade, and a plurality of chip top points are fixedly provided inside the chip breaker groove.

[0013] The present invention also provides a milling device equipped with the above-mentioned symmetrical drill head, the milling device comprising:

[0014] A lifting part, the lifting part includes a tool mounting mechanism and a lifting mechanism for driving the tool mounting mechanism to perform reciprocating lifting and lowering, and the tool body is detachably mounted on the bottom end of the tool mounting mechanism;

[0015] The processing section includes a feeding mechanism, a deflection mechanism for intermittently pushing the fed workpiece to the processing station, and a workpiece clamping mechanism for clamping and fixing the workpiece pushed to the processing station, the deflection mechanism and the workpiece clamping mechanism being linked by a lifting mechanism;

[0016] The base is provided, and the lifting part and the processing part are both installed on the top of the base.

[0017] As a preferred solution of the milling equipment of the symmetrical drill head described in the present invention, the lifting mechanism includes an L-shaped frame fixed to the top of the base, a cylinder is fixedly installed on the top of the horizontal section of the L-shaped frame, and two opposite U-shaped slot frames are fixedly provided at the bottom of the horizontal section of the L-shaped frame, a lifting frame is slidably installed between the two U-shaped slot frames, the telescopic end of the cylinder passes through the L-shaped frame and is fixedly connected to the top of the lifting frame, a shaft is rotatably installed on the bottom end of the lifting frame through a bearing, and the tool mounting mechanism is fixedly installed on the bottom end of the shaft.

[0018] As a preferred embodiment of the milling device of the symmetrical drill head of the present invention, the tool mounting mechanism includes a mounting plate fixedly connected to the bottom end of the shaft, two buckle covers for buckling the tool holder are provided at the bottom of the mounting plate, hoop grooves and a liquid tank located between the two hoop grooves are provided at both ends of the outer sides of the two buckle covers, a hoop ring for fixing the two buckle covers in a buckled state is provided between the two corresponding hoop grooves, and a ring cover is movably provided on the outer sides of the two buckle covers in a buckled state;

[0019] There are card slots on both sides of the knife seat, and clamping blocks are fixed inside the two buckle covers. A protrusion corresponding to the card slot is fixed on the side of the clamping block facing the knife seat, and a connecting block is fixed between the clamping block and the inner side of the corresponding buckle cover.

[0020] As a preferred embodiment of the milling device of the symmetrical drill head of the present invention, two slots are formed on the top ends of the two buckle covers on opposite sides, a pin is fixedly provided inside each slot, and a pin rod is fixedly connected to the end of the pin rod on one buckle cover, and a pin hole is formed on the end of the pin rod on the other buckle cover to match the corresponding pin rod;

[0021] The two corresponding slots form a slot frame, and a through slot is provided on the top of the mounting plate, facing the slot frame. A double-extension cylinder is fixedly installed in the middle of the inner cavity of the through slot, and the two output ends of the double-extension cylinder are fixedly connected to L-shaped buckle blocks that are slidably installed inside the corresponding through slot.

[0022] As a preferred embodiment of the milling device for the symmetrical drill head of the present invention, the tool mounting mechanism further comprises a square column fixedly mounted on the bottom of the lifting frame, a liquid inlet pipe fixedly mounted on the square column, and a liquid outlet end of the liquid inlet pipe communicating with a cavity enclosed by the position of the ring cover and the buckle cover corresponding to the liquid groove;

[0023] A rubber plug is installed on the top of the leakage groove, and a liquid supply pipe is fixedly provided at the axial center line position of the rubber plug. Arc grooves are opened at the positions corresponding to the liquid grooves on the opposite sides of the two buckle covers, and the liquid inlet end of the liquid supply pipe is inserted into the circular hole formed by the two corresponding arc grooves.

[0024] As a preferred embodiment of the milling device of the symmetrical drill head of the present invention, the workpiece clamping mechanism includes two L-shaped pressure rods fixed to the outside of the ring cover and vertical bars fixed to the top of the base on both sides of the tool mounting mechanism, a horizontal bar is provided between the opposite sides of the two vertical bars, and the tops of the two horizontal bars are provided with a trapezoidal groove facing the corresponding L-shaped pressure rods;

[0025] The opposite sides of the two vertical bars are fixedly connected with an insertion rod, and the opposite ends of the two horizontal bars are provided with a rod groove that matches the insertion rod. The insertion rod is movably inserted into the corresponding rod groove, and the opposite ends of the two horizontal bars are fixedly connected with a V-shaped block. The outside of each insertion rod is provided with a straight spring that fixedly connects the corresponding horizontal bar and vertical bar.

[0026] As a preferred embodiment of the milling device of the symmetrical drill head of the present invention, the deflection mechanism includes a fixed column and an L-shaped stop bar fixedly arranged on the top of the base, a ring cylinder is movably sleeved on the outer side of the fixed column, a round rod and a material shifting assembly are fixedly arranged on the outer side of the ring cylinder, and a second straight spring is sleeved on the outer side of the ring cylinder, and both ends of the second straight spring are fixedly connected to a bar, and the two bars are respectively stopped and limited by the material shifting assembly and the L-shaped stop bar;

[0027] The yaw mechanism also includes a straight plate movably sleeved on the outside of the shaft and a straight guide groove opened on the inside of the L-shaped frame. Two limiting rings are fixedly sleeved on the outside of the shaft to limit the straight plate. One end of the straight plate is fixedly connected to a trapezoidal plate, and one side of the trapezoidal plate is fixedly provided with a guide block slidably connected to the inside of the straight guide groove.

[0028] As a preferred scheme of the milling equipment of the symmetrical drill head, the material pushing assembly comprises a fixed seat fixedly connected with the ring cylinder, a recess is formed in one end of the fixed seat, a movable seat is hingedly installed in the recess, and an arc-shaped spring is fixedly arranged outside the movable seat.

[0029] As a preferred scheme of the milling equipment of the symmetrical drill head, the material pushing assembly comprises a fixed seat fixedly connected with the ring cylinder, a recess is formed in one end of the fixed seat, a movable seat is hingedly installed in the recess, and an arc-shaped spring is fixedly arranged outside the movable seat.

[0030] The beneficial effects of the present application are as follows:

[0031] 1. The symmetrical drill head can be more evenly stressed during milling processing, and is not prone to tool vibration, thereby improving milling quality. In addition, the split chip grooves are arranged in a staggered manner on the circumferential side of the blade to reduce the resistance during milling, and the chip breaking points are arranged on the surface of the blade to assist in chip breaking and improve the service life of the tool.

[0032] 2. The lifting mechanism is used to intermittently drive the reciprocating movement of the rotating tool body. During the downward movement of the tool body for milling processing, the workpiece clamping mechanism is preferentially driven to clamp and position the workpiece in the specified position. During the upward movement of the tool body for resetting, the deflection mechanism is controlled to push the workpiece to be processed in the material falling position to the specified position for processing. The entire processing process is fully automated, thereby improving production efficiency.

[0033] 3. The tool mounting mechanism is provided in a buckling structure, which improves the convenience of disassembly and assembly of the tool body and enhances the stability of the tool body during milling processing. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0035] Figure 1 is a first perspective view of the overall structure of the symmetrical drill head of the present application.

[0036] Figure 2 is a second perspective view of the overall structure of the symmetrical drill head of the present application.

[0037] Figure 3 It is a schematic diagram of the local structure of the shank of the symmetrical drill bit of the present invention;

[0038] Figure 4 Schematic diagram of the blade structure of the symmetrical drill bit of the present invention;

[0039] Figure 5 This is a schematic diagram of the overall structure of the milling device of the present invention from a first perspective;

[0040] Figure 6 This is a schematic diagram of the overall structure of the milling device of the present invention from a second perspective;

[0041] Figure 7 It is a schematic diagram of the lifting mechanism structure of the milling equipment of the present invention;

[0042] Figure 8 It is a schematic diagram of the overall structure of the processing part of the milling equipment of the present invention;

[0043] Figure 9 This invention Figure 8 A schematic diagram of a local structure from the first perspective;

[0044] Figure 10 This invention Figure 8 A schematic diagram of a local structure from a second perspective;

[0045] Figure 11 This invention Figure 8 Schematic diagram of the local structure from the third perspective;

[0046] Figure 12 This invention Figure 9 A schematic diagram of the structure of part A in the middle;

[0047] Figure 13 It is a schematic diagram of a first perspective exploded view of the tool mounting mechanism in the milling device of the present invention;

[0048] Figure 14 It is a schematic diagram from a second perspective of the decomposed tool mounting mechanism in the milling equipment of the present invention.

[0049] The accompanying drawings are numeraled as follows: 1. tool bar; 11. leakage hole; 12. leakage groove; 2. tool holder; 3. blade groove; 4. blade; 41. chip dividing groove; 42. chip top point; 5. base; 6. lifting mechanism; 61. L-shaped frame; 62. U-shaped groove frame; 63. lifting frame; 64. cylinder; 7. tool mounting mechanism; 71. mounting plate; 72. buckle cover; 73. hoop groove; 74. liquid tank; 75. clamping block; 76. protrusion; 77. notch; 78. plug; 79. hoop; 710. rubber plug; 711. liquid supply pipe; 712. ring cover; 713. through groove; 714. L-shaped buckle block; 715. liquid inlet pipe; 716. square column; 8 , workpiece clamping mechanism; 81, L-shaped pressure rod; 82, vertical bar; 83, horizontal bar; 84, trapezoidal groove; 85, plug rod; 86, straight spring one; 9, deflection mechanism; 91, fixed column; 92, L-shaped baffle; 93, ring tube; 94, straight spring two; 95, bar block; 96, material shifting assembly; 961, fixed seat; 962, groove; 963, moving seat; 964, arc rod; 965, arc spring; 97, round rod; 98, straight plate; 99, trapezoidal plate; 910, guide block; 911, limiting ring; 10, feeding mechanism; 101, support; 102, track frame; 103, support plate; 104, barrel; 105, guide bar. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0051] The symmetrical drill bit of the present invention is a type of milling tool, which is used for drilling a target workpiece and is generally used as a matching tool for a milling machine tool.

[0052] The milling equipment of the present invention belongs to a part of the intelligent manufacturing equipment industry and is a type of drilling equipment, and is mainly used for milling holes in metal workpieces with cylindrical structures.

[0053] Example 1

[0054] Refer to the instruction manual Figures 1-4This embodiment is the first embodiment of the present invention, which provides a symmetrical drill head. The symmetrical drill head includes a tool body, which is composed of a tool rod 1, a tool seat 2 fixed to one end of the tool rod 1, two blade slots 3 provided at the other end of the tool rod 1, and blades 4 detachably installed inside the blade slots 3. The two blade slots 3 are centrally symmetrically arranged about the axis of the tool rod 1, so that the two blades 4 installed at the ends of the tool rod 1 can be symmetrically installed, so that the symmetrical drill head is subjected to more uniform force during the milling process. In addition, the symmetrical installation of the two blades 4 not only has high processing accuracy, but also is less likely to cause tool chattering during the milling process.

[0055] A leakage groove 12 that passes through the tool holder 2 is provided at the axis of the tool arbor 1. Leakage holes 11 connected to the leakage groove 12 are provided at the positions of the two blades 4 at the end of the tool arbor 1, forming a double-sided equal leakage structure, allowing the coolant to better enter the milling position and improve the cooling quality. In addition, the drilling end of the tool arbor 1 corresponding to the positions of the two blade slots 3 are set to widen downward at a 30° angle to reduce the risk of tearing at the end of the central drilling end of the tool arbor 1;

[0056] The blade 4 is set to a triangular hexagonal structure. The positive rake angle on the outer side of the cutting edge of the blade 4 ensures cutting sharpness. The widened flat edge is used on the inner side to ensure that there is no chipping under low linear speed on the inner side. The circumferential side of the blade 4 is provided with multiple chip grooves 41 distributed in a staggered manner, which can avoid the outer edge being too long and reduce milling resistance. The surface of the blade 4 is provided with a chip breaker groove arranged in a closed loop, and multiple top chip points 42 are fixed inside the chip breaker groove. The design of the top chip point 42 is conducive to chip breaking and can avoid the disadvantage of premature wear of the top surface of the traditional U-drill chip roll surface.

[0057] It should be noted that the two blades 4 mentioned above are installed in a symmetrical stacking manner by using two triangular hexagonal blades during the three-mixing process, and the two blades 4 are generally installed in a staggered manner with angle numbers to achieve the effect of staggered chip separation.

[0058] Furthermore, the drill diameter of the symmetrical drill head mentioned above ranges from 15 to 32 mm, and the average diameter is 2 mm, and the drill bit uses the same blade type.

[0059] Compared with the traditional U-drill, the symmetrical drill head of the present invention adopts symmetrical installation of the blade 4 to make the force more uniform during the milling process. Moreover, when it is completely symmetrically installed at the same speed and the same F value, the feed of each tooth is uniform. Compared with the asymmetrical staggered installation of the traditional U-drill, the actual feed thickness of each tooth is actually half, and a higher F value can be obtained, thereby obtaining higher processing efficiency. Compared with the crown drill, the blade of this product can be directly pressed into shape, the manufacturing difficulty and cost are much lower than the crown drill, and the drill rod manufacturing difficulty is also lower than the crown drill.

[0060] Example 2

[0061] Refer to the instruction manual Figures 5-6 This embodiment is the second embodiment of the present invention, which provides a milling device with a symmetrical drill head. The milling device consists of a base 5 and a processing part and a lifting part installed on the top of the base 5, wherein the lifting part includes a tool mounting mechanism 7 and a lifting mechanism 6 for driving the tool mounting mechanism 7 to perform reciprocating lifting and lowering. The tool body is detachably mounted on the bottom end of the tool mounting mechanism 7. The processing part includes a feeding mechanism 10, a deflection mechanism 9 for intermittently pushing the fed workpiece to the processing station, and a workpiece clamping mechanism 8 for clamping and fixing the workpiece pushed to the processing station. The deflection mechanism 9 and the workpiece clamping mechanism 8 are linked through the lifting mechanism 6.

[0062] It should be noted that the present invention utilizes the lifting mechanism 6 to intermittently drive the rotating tool body to move back and forth up and down, and in the process of driving the tool body downward to perform milling processing on the workpiece, it will preferentially drive the workpiece clamping mechanism 8 to complete the clamping and positioning of the workpiece entering the designated workstation (the workpiece to be processed referred to in the present invention is a cylindrical structure), and then in the process of driving the tool body to reset upward, it will control the yaw mechanism 9 to push the workpiece to be processed at the blanking station to the designated station to wait for processing. The entire processing process is fully automated, which improves production efficiency.

[0063] Furthermore, if Figure 7 As shown, the lifting mechanism 6 includes an L-shaped frame 61 fixed to the top of the base 5, and a cylinder 64 is fixedly installed on the top of the horizontal section of the L-shaped frame 61, and two opposite U-shaped slot frames 62 are fixedly provided at the bottom of the horizontal section of the L-shaped frame 61, and a lifting frame 63 is slidably installed between the two U-shaped slot frames 62. The guide rail formed by the two U-shaped slot frames 62 can be used to limit the lifting frame 63 to reduce the amplitude of the lifting frame 63 during milling processing, thereby improving the stability of the milling processing. The telescopic end of the cylinder 64 passes through the L-shaped frame 61 and is fixedly connected to the top of the lifting frame 63. The bottom end of the lifting frame 63 is rotatably installed with a shaft rod through a bearing. The shaft is driven to rotate by a motor installed inside the lifting frame 63, and the tool mounting mechanism 7 is fixedly installed at the bottom end of the shaft rod.

[0064] It should be noted that in the process of driving the tool body clamped on the tool mounting mechanism 7 to rotate and reciprocate and lift, the cylinder 64 used is a single-acting cylinder with model DSA25N200, and the motor used is an asynchronous motor. The specific model can be selected according to actual processing requirements.

[0065] Furthermore, if Figure 8 and Figure 10As shown, the workpiece clamping mechanism 8 includes two L-shaped pressure rods 81 fixed to the tool mounting mechanism 7 and vertical bars 82 fixed to the top of the base 5 and located on both sides of the tool mounting mechanism 7. A horizontal bar 83 is provided between the opposite sides of the two vertical bars 82. The tops of the two horizontal bars 83 are each provided with a trapezoidal groove 84 facing the corresponding L-shaped pressure rod 81. The axial cross-section of the trapezoidal groove 84 is a right-angled trapezoid, and the inclined surfaces of the two trapezoidal grooves 84 are arranged facing each other.

[0066] The opposite sides of the two vertical bars 82 are fixedly connected with an insertion rod 85, and the opposite ends of the two horizontal bars 83 are provided with a rod groove that matches the insertion rod 85. The insertion rod 85 is movably inserted into the corresponding rod groove, and the opposite ends of the two horizontal bars 83 are fixedly connected with a V-shaped block. An anti-slip pad can be added to the side of the V-shaped block facing the workpiece to be processed to improve the stability of the workpiece when clamping and positioning. The outside of each insertion rod 85 is sleeved with a straight spring 86 fixedly connected to the corresponding horizontal bar 83 and the vertical bar 82. During the elastic deformation of the straight spring 86, the end of the insertion rod 85 always remains in a state of movably inserted into the corresponding rod groove, and when the straight spring 86 is in a natural state, the minimum distance between the two V-shaped blocks is greater than the diameter of the workpiece to be processed.

[0067] It should be noted that, in the process of driving the rotating tool body to perform milling on the target workpiece, the relevant structure of the tool mounting mechanism 7 (see the relevant description in the following embodiment 3 for details) is designed to control the L-shaped pressure rod 81 to move only in the vertical direction. In the process of using the cylinder 64 to push the tool body clamped on the tool mounting mechanism 7 to feed downward to perform milling on the target workpiece, the L-shaped pressure rod 81 is allowed to enter the trapezoidal groove 84 on the corresponding horizontal bar 83 during the synchronous downward movement of the tool mounting mechanism 7, and to generate an angular contact with the inclined surface of the trapezoidal groove 84. When the L-shaped pressure rod 81 is in contact with the target workpiece, the L-shaped pressure rod 81 will gradually squeeze the inclined surface of the corresponding trapezoidal groove 84 as it continues to feed downward, so that the horizontal bar 83 gradually approaches the target workpiece under the restriction of the corresponding insertion rod 85. At the same time, the corresponding straight spring 86 is stretched. When the lower end of the L-shaped pressure rod 81 passes through the corresponding trapezoidal groove 84, the two V-shaped blocks moving in opposite directions complete the clamping and centering of the target workpiece. Then, the L-shaped pressure rod 81 continues to feed downward. At this time, the two horizontal bars 83 no longer move in opposite directions, and the rotating tool body completes the milling process of the target workpiece during the feeding process.

[0068] In the above-mentioned process of clamping and fixing the target workpiece, in order to improve the stability of the horizontal feed of the horizontal bar 83 during the pressing process of the L-shaped pressure rod 81, a support column for supporting the horizontal bar 83 can be fixed on the top of the base 5 (here as a further optimization solution, not specifically drawn in the accompanying drawings). The existence of the support column will not affect the pressing process of the L-shaped pressure rod 81d.

[0069] Furthermore, if Figure 5 and Figures 10-11 As shown, the feeding mechanism 10 includes a support 101 fixed on the top of the base 5 and a track frame 102, wherein the track frame 102 is composed of an arc segment and a horizontal segment, and a passage groove is opened in the middle of the area where the arc segment of the track frame 102 is located, for the pusher part of the deflection mechanism 9 to move, and a blocking rod is fixed at the inner end of the arc segment of the track frame 102 to prevent the target workpiece from sliding away from the end of the arc segment of the track frame 102 away from the horizontal segment under the action of the pusher part of the deflection mechanism 9. 1 is fixedly connected to a barrel 104 at one end, and a support plate 103 is fixedly provided on the top of the support plate 103, and a guide bar 105 is fixedly provided on the top of the barrel 104. A material opening is provided at the top of the barrel 104 above the support plate 103. The width of the material opening is equal to the distance between the two guide bars 105 and is slightly larger than the diameter of the target workpiece. The end of the opposite side of the two guide bars 105 away from the material opening is in a flared structure to facilitate feeding. The inner diameter of the barrel 104 is smaller than the inner width of the track frame 102.

[0070] It should be noted that in the process of continuous feeding, the target workpieces need to be placed on the pallet 103 in sequence first, and pushed to the inside of the barrel 104 along the feeding channel formed by the two guide bars 105 for stacking, and the target workpiece at the bottom just completely leaves the barrel 104 and enters the interior of the track frame 102, waiting for the deflection mechanism 9 to act on it and push it to the designated processing station.

[0071] Furthermore, if Figures 7-9 and Figure 12 As shown, the yaw mechanism 9 includes a fixed column 91 fixed to the top of the base 5 and an L-shaped stop bar 92, and a ring cylinder 93 is movably sleeved on the outer side of the fixed column 91. In order to prevent the ring cylinder 93 from detaching from the fixed column 91, a stop block can be fixed at a position inside the ring cylinder 93 on the outer side of the fixed column 91, and a limiting arc groove facing the stop block is opened on the inner side of the ring cylinder 93, and the stop block is slidably connected to the inside of the limiting arc groove (not specifically shown in the drawings here), a round rod 97 and a material shifting assembly 96 are fixed on the outer side of the ring cylinder 93, and a straight spring 94 is also sleeved on the outer side of the ring cylinder 93. Both ends of the straight spring 94 are fixedly connected to a bar 95, and the two bars 95 are stopped and limited by the material shifting assembly 96 and the L-shaped stop bar 92 respectively;

[0072] The yaw mechanism 9 also includes a straight plate 98 movably sleeved on the outside of the shaft and a straight guide groove opened on the inside of the L-shaped frame 61. Two limiting rings 911 are fixedly sleeved on the outside of the shaft to limit the straight plate 98. One end of the straight plate 98 is fixedly connected to a trapezoidal plate 99, and one side of the trapezoidal plate 99 is fixedly provided with a guide block 910 slidably connected to the inside of the straight guide groove. The setting of the limiting ring 911 can ensure that the straight plate 98 does not rotate with the shaft, while also ensuring that the straight plate 98 can move up and down along the straight guide groove under the action of the lifting mechanism 6. In addition, the two bars 95 are respectively fixedly connected to the corresponding material selection assembly 96 and the L-shaped baffle 92. In this way, it can be ensured that the ring cylinder 93 can automatically reset under the restoring force of the straight spring 2 94 after being squeezed and deflected by the downward-feeding trapezoidal plate 99.

[0073] Furthermore, the material-dispensing assembly 96 includes a fixed seat 961 fixedly connected to the ring tube 93, wherein the bar 95 fixedly connected to the material-dispensing assembly 96 is fixedly connected to the fixed seat 961, and a groove 962 is provided at one end of the fixed seat 961. A movable seat 963 is hingedly installed inside the groove 962, and an arc rod 964 that movably penetrates the movable seat 963 is fixed inside the groove 962. An arc spring 965 is provided on the outer side of the arc rod 964. When no external force is applied, the relative position between the fixed seat 961 and the movable seat 963 is as shown in FIG. Figure 12 As shown, in this state, the movable seat 963 is blocked by the fixed seat 961 and cannot continue to swing to the right.

[0074] It should be noted that when the tool body is in the initial state of not feeding downward, the material-dispensing assembly 96 is exactly at the inner end of the travel groove on the track frame 102, and the material-dispensing end of the material-dispensing assembly 96 at this position is exactly in contact with the outer side of the target workpiece entering the designated processing station (this state is intended to be set as the initial state of processing). In the process of using the deflection mechanism 9 to push the target workpiece that falls from the inside of the barrel 104 into the track frame 102 to the designated processing station, when the cylinder 64 is used to push the rotating tool body to process the target workpiece pushed to the designated processing station, as the tool body The gradual downward feeding will synchronously drive the trapezoidal plate 99 connected to the end of the straight plate 98 to move downward under the guidance of the straight guide groove. During this period, as the trapezoidal plate 99 gradually moves downward, it will gradually squeeze the round rod 97 on the outside of the ring cylinder 93, causing the ring cylinder 93 to rotate with the fixed column 91 as the central axis. At the same time, it drives the material shifting assembly 96 to rotate synchronously with the ring cylinder 93. Since the position of the L-shaped baffle 92 remains unchanged, the material shifting assembly 96, which changes its position, will apply a thrust to the straight spring 2 94 in the process of rotating with the ring cylinder 93, allowing the straight spring 2 94 to store force.

[0075] At the same time, as the material-prying assembly 96 rotates synchronously with the ring cylinder 93, the material-prying assembly 96 will move along the travel groove in the direction of leaving the travel groove. When the movable seat 963 on the material-prying assembly 96 moves until it contacts the target workpiece that has fallen into the track frame 102, the target workpiece that has fallen into the track frame 102 is blocked by the stop rod placed horizontally at the inner end of the arc segment of the track frame 102. As the material-prying assembly 96 continues to swing, the movable seat 963 will, under the reverse thrust of the target workpiece, deflect along the direction of the arc rod 964 with the central axis hinged to the fixed seat 961 as the base axis, and compress the arc spring 965. When the movable seat 963 deflects to the point of being offset from the target workpiece, the movable seat 963 will reset under the restoring force of the arc spring 965, waiting for the next round of moving the target workpiece into the designated processing station.

[0076] When the rotating tool body is pushed by the cylinder 64 to retreat after completing the milling process, the trapezoidal plate 99 will gradually rise, and the ring cylinder 93 will reset and rotate under the restoring force of the straight spring 2 94, and at the same time, it will drive the material-pickup assembly 96 to move in the direction of the passage groove. After the movable seat 963 on it moves into the passage groove and contacts the target workpiece, as the ring cylinder 93 continues to reset, the movable seat 963 will push the target workpiece that has fallen into the track frame 102 to move to the designated processing station. In this process, since the movable seat 963 moves to the right along the arc rod 964 (see Figure 12 ) is deflected, so that the material shifting assembly 96 directly pushes the target workpiece to the designated processing station during the reset process, waiting for the next round of milling processing;

[0077] It should be noted that in the above process, the first downward movement of the rotating tool body is a drilling state, and then it returns to normal to perform continuous milling processing and automatic feeding. During this period, it is only necessary to ensure that there are enough target workpieces inside the barrel 104.

[0078] Example 3

[0079] Refer to the instruction manual Figure 10 and Figures 13-14, this embodiment is the third embodiment of the present invention, which is different from the second embodiment in that: the tool mounting mechanism 7 includes a mounting plate 71 fixedly connected to the bottom end of the shaft, and two buckle covers 72 for buckling the tool holder 2 are provided at the bottom of the mounting plate 71, and hoop grooves 73 and a liquid tank 74 located between the two hoop grooves 73 are provided at both ends of the outer sides of the two buckle covers 72, and a hoop ring 79 for fixing the two buckle covers 72 in the buckled state is provided between the two corresponding hoop grooves 73, and a ring cover 712 is movably provided on the outer sides of the two buckle covers 72 in the buckled state, and the two L-shaped pressure rods 81 are fixed on the outer sides of the ring cover 712, wherein the outer diameter of the hoop ring 79 is larger than the outer diameter of the ring cover 712, so that the position of the ring cover 712 can be limited by the two hoop rings 79;

[0080] There are card slots on both sides of the knife holder 2, and clamping blocks 75 are fixed inside the two buckle covers 72. A protrusion 76 corresponding to the card slot is fixed on the side of the clamping block 75 facing the knife holder 2. When the two buckle covers 72 are buckled together under the action of the hoop 79, the protrusion 76 is completely inserted into the corresponding card slot to clamp the knife holder 2. A connecting block is fixed between the clamping block 75 and the inner side of the corresponding buckle cover 72, and the connecting block can be used to enhance the stability of the clamping block 75 when clamping the knife holder 2.

[0081] Furthermore, two notches 77 are formed at the top ends of opposite sides of the two buckle covers 72. A pin 78 is fixedly disposed inside each notch 77. A pin is fixedly connected to the end of the pin 78 on one buckle cover 72, and a pin hole is formed at the end of the pin 78 on the other buckle cover 72 to match the corresponding pin. When the two buckle covers 72 are buckled together under the action of the hoop 79, the pin is completely inserted into the corresponding pin hole.

[0082] Two corresponding slots 77 form a slot frame, and a through slot 713 is opened on the top of the mounting plate 71 and is opposite to the slot frame. A double-extension cylinder is fixedly installed in the middle of the inner cavity of the through slot 713. The double-extension cylinder adopts the ESFD standard cylinder of the double-extension rod type. The two output ends of the double-extension cylinder are fixedly connected to an L-shaped buckle block 714 that is slidably installed in the corresponding through slot 713. Each L-shaped buckle block 714 is penetrated by a through hole, and the plug column 78 is movably inserted into the corresponding through hole.

[0083] Further, the tool mounting mechanism 7 further comprises a square column 716 fixedly installed at the bottom of the lifting frame 63, specifically, the square column 716 is fixedly installed with the lifting frame 63 through locking bolts, so as to facilitate subsequent replacement of the tool body, and the square column 716 is fixedly installed with a liquid inlet pipe 715 made of rigid hard material, so as to better limit the relative position of the ring cover 712, the outlet end of the liquid inlet pipe 715 is in communication with the cavity formed by the positions of the ring cover 712 and the corresponding liquid groove 74 on the buckle cover 72, and a sealing rubber ring is arranged on the inner side of the ring cover 712 at the upper and lower edge positions of the liquid groove 74 to prevent liquid leakage;

[0084] The top end of the leakage groove 12 is provided with a rubber plug 710, and a liquid supply pipe 711 is fixedly and penetratingly arranged at the axial line position of the rubber plug 710. In this application, the liquid inlet pipe 715 is arranged in a T-shaped structure, and the positions corresponding to the liquid grooves 74 on the opposite sides of the two buckle covers 72 are provided with arc grooves, and sealing rubber rings are also fixedly arranged on the inner sides of the two arc grooves to prevent liquid leakage. The liquid inlet end of the liquid supply pipe 711 is inserted into the circular hole formed by the two arc grooves.

[0085] It should be noted that during the clamping of the tool body, the two buckle covers 72 are pre-assembled with the mounting disc 71, that is, the insertion column 78 on the buckle cover 72 is inserted into the through hole on the corresponding L-shaped buckle block 714 on the mounting disc 71, but the two buckle covers 72 do not affect the insertion of the tool holder 2 into the mounting position. When the pre-assembly between the two buckle covers 72 and the mounting disc 71 is completed, the rubber plug 710 provided with the liquid supply pipe 711 is installed at the leakage groove 12 on the tool holder 2, the tool holder 2 is inserted between the two buckle covers 72, the clamping grooves on both sides of the tool holder 2 correspond to the protrusions 76 on the inner sides of the buckle covers 72, the two liquid inlet ends of the liquid supply pipe 711 are opposite the arc grooves on the buckle covers 72, then the two buckle covers 72 are buckled tightly, the pre-assembly of the tool body is completed, then the upper end of the buckle cover 72 is buckled by the hoop 79, then the ring cover 712 is inserted from the lower end of the buckle cover 72 to between the two groups of hoop grooves 73, the lower end of the ring cover 72 is buckled by the hoop 79, the relative position of the ring cover 712 is fixed, and thus the clamping of the tool body is completed.

[0086] After the installation of the tool body is completed, if the milling equipment is used for milling, it is necessary to start by synchronously driving the corresponding two L-shaped buckle blocks 714 to move in opposite directions by the double-acting cylinder until the four L-shaped buckle blocks 714 completely top and tightly buckle the buckle cover 72. In this way, it can be ensured that the tool body stably rotates, and during the milling process, it is also necessary to continuously supplement the cooling liquid through the liquid inlet pipe 715, and let the cooling liquid pass through the liquid supply pipe 711, the leakage groove 12, and then be discharged from the two leakage holes 11 on the tool bar 1 to the milling area where the cutting inserts 4 corresponding to the teeth are located, thereby improving the stability of the tool body during the milling process.

[0087] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A symmetrical drill bit, characterized in that: The cutter head comprises: A tool body, the tool body comprising a tool rod (1), a tool holder (2) fixed to one end of the tool rod (1), two tool holders (2) arranged at the other end of the tool rod (1), and a blade (4) detachably mounted inside the tool holder (2), wherein the two tool holders (2) are centrally symmetrically arranged about the axis of the tool rod (1); A leakage groove (12) penetrating the knife seat (2) is provided at the axis of the knife rod (1), and leakage holes (11) communicating with the leakage groove (12) are provided at the ends of the knife rod (1) at positions corresponding to the two blades (4); The blade (4) is configured as a triangular hexagonal structure, a plurality of staggered chip dividing grooves (41) are provided on the circumferential side of the blade (4), and a closed-loop chip breaker groove is provided on the surface of the blade (4), wherein a plurality of chip top points (42) are fixedly provided inside the chip breaker groove.

2. A milling device with a symmetrical drill head, wherein the symmetrical drill head according to claim 1 is mounted on the milling device, characterized in that: The milling equipment comprises: A lifting portion, the lifting portion comprising a tool mounting mechanism (7) and a lifting mechanism (6) for driving the tool mounting mechanism (7) to perform reciprocating lifting and lowering, wherein the tool body is detachably mounted on the bottom end of the tool mounting mechanism (7); A processing section, comprising a feeding mechanism (10), a deflection mechanism (9) for intermittently pushing a fed workpiece to a processing station, and a workpiece clamping mechanism (8) for clamping and fixing the workpiece pushed to the processing station, wherein the deflection mechanism (9) and the workpiece clamping mechanism (8) are linked to each other via a lifting mechanism (6); A base (5), wherein the lifting part and the processing part are both installed on the top of the base (5).

3. A milling device with a symmetrical drill head according to claim 2, characterized in that: The lifting mechanism (6) comprises an L-shaped frame (61) fixed on the top of the base (5); a cylinder (64) is fixedly installed on the top of the horizontal section of the L-shaped frame (61); and two U-shaped slot frames (62) facing each other are fixedly provided on the bottom of the horizontal section of the L-shaped frame (61); a lifting frame (63) is slidably installed between the two U-shaped slot frames (62); the telescopic end of the cylinder (64) passes through the L-shaped frame (61) and is fixedly connected to the top of the lifting frame (63); a shaft is rotatably installed on the bottom of the lifting frame (63) through a bearing; and a tool mounting mechanism (7) is fixedly installed on the bottom of the shaft.

4. A milling device with a symmetrical drill head according to claim 3, characterized in that: The tool mounting mechanism (7) includes a mounting plate (71) fixedly connected to the bottom end of the shaft, two buckle covers (72) for buckling the tool holder (2) are provided at the bottom of the mounting plate (71), hoop grooves (73) and a liquid tank (74) located between the two hoop grooves (73) are provided at both ends of the outer sides of the two buckle covers (72), a hoop ring (79) for fixing the two buckle covers (72) in a buckled state is provided between the two corresponding hoop grooves (73), and a ring cover (712) is movably provided on the outer sides of the two buckle covers (72) in a buckled state; Both sides of the knife seat (2) are provided with card slots, and the insides of the two buckle covers (72) are fixed with clamping blocks (75), and the side of the clamping block (75) facing the knife seat (2) is fixed with a protrusion (76) corresponding to the card slot, and a connecting block is fixed between the clamping block (75) and the inner side of the corresponding buckle cover (72).

5. A milling device with a symmetrical drill head according to claim 4, characterized in that: Two notches (77) are provided on the top ends of the opposite sides of the two buckle covers (72), and a plug post (78) is fixedly provided inside each notch (77), and the end of the plug post (78) on one of the buckle covers (72) is fixedly connected to a pin rod, and the end of the plug post (78) on the other buckle cover (72) is provided with a pin hole adapted to the corresponding pin rod; The two correspondingly arranged notches (77) form a slot frame, a through slot (713) is provided through the top of the mounting plate (71) and is directly opposite to the slot frame, a double extension cylinder is fixedly installed in the middle of the inner cavity of the through slot (713), and both output ends of the double extension cylinder are fixedly connected to L-shaped buckle blocks (714) slidably installed in the corresponding through slot (713).

6. A milling device with a symmetrical drill head according to claim 5, characterized in that: The tool mounting mechanism (7) further comprises a square column (716) fixedly mounted on the bottom of the lifting frame (63); a liquid inlet pipe (715) is fixedly mounted on the square column (716); a liquid outlet end of the liquid inlet pipe (715) is in communication with a cavity enclosed by the position of the ring cover (712) and the buckle cover (72) corresponding to the liquid tank (74); A rubber plug (710) is installed at the top of the leakage groove (12), and a liquid supply pipe (711) is fixedly provided at the axis position of the rubber plug (710). Arc grooves are provided at the positions corresponding to the liquid grooves (74) on the opposite sides of the two buckle covers (72), and the liquid inlet end of the liquid supply pipe (711) is inserted into the circular hole formed by the two corresponding arc grooves.

7. A milling device with a symmetrical drill head according to claim 4, characterized in that: The workpiece clamping mechanism (8) comprises two L-shaped pressure rods (81) fixed on the outside of the ring cover (712) and vertical bars (82) fixed on the top of the base (5) and located on both sides of the tool mounting mechanism (7); a horizontal bar (83) is provided between the two vertical bars (82) on opposite sides; and a trapezoidal groove (84) is provided on the top of each of the two horizontal bars (83) and is directly opposite to the corresponding L-shaped pressure rod (81); The opposite sides of the two vertical bars (82) are fixedly connected with an insertion rod (85), and the opposite ends of the two horizontal bars (83) are provided with a rod groove adapted to the insertion rod (85), and the insertion rod (85) is movably inserted into the corresponding rod groove. The opposite ends of the two horizontal bars (83) are fixedly connected with a V-shaped block, and the outer side of each insertion rod (85) is sleeved with a straight spring (86) that is fixedly connected to the corresponding horizontal bar (83) and the vertical bar (82).

8. The milling device of a symmetrical drill head according to claim 3, characterized in that: The deflection mechanism (9) comprises a fixed column (91) and an L-shaped retaining bar (92) fixedly arranged on the top of the base (5); a ring cylinder (93) is movably sleeved on the outer side of the fixed column (91); a round rod (97) and a material shifting assembly (96) are fixedly arranged on the outer side of the ring cylinder (93); a second straight spring (94) is sleeved on the outer side of the ring cylinder (93); both ends of the second straight spring (94) are fixedly connected to a bar (95); the two bars (95) are respectively stopped and limited by the material shifting assembly (96) and the L-shaped retaining bar (92); The deflection mechanism (9) further comprises a straight plate (98) movably sleeved on the outside of the shaft and a straight guide groove opened on the inside of the L-shaped frame (61); two limiting rings (911) for limiting the straight plate (98) are fixedly sleeved on the outside of the shaft; one end of the straight plate (98) is fixedly connected to a trapezoidal plate (99); and one side of the trapezoidal plate (99) is fixedly provided with a guide block (910) slidably connected to the inside of the straight guide groove.

9. A milling device with a symmetrical drill head according to claim 8, characterized in that: The material shifting assembly (96) includes a fixed seat (961) fixedly connected to the ring tube (93), a groove (962) is provided at one end of the fixed seat (961), a movable seat (963) is hingedly installed inside the groove (962), and an arc rod (964) that movably penetrates the movable seat (963) is fixed inside the groove (962), and an arc spring (965) is sleeved on the outer side of the arc rod (964).

10. The milling device of a symmetrical drill head according to claim 2, characterized in that: The feeding mechanism (10) comprises a support (101) and a track frame (102) fixed on the top of the base (5); one end of the support (101) is fixedly connected to a barrel (104); a supporting plate (103) is fixedly provided on the top of the support (101); a guide bar (105) is fixedly provided on the top of the supporting plate (103); and the inner diameter of the barrel (104) is smaller than the inner width of the track frame (102).

Images