A symmetrical drill head and its milling apparatus

Abstract

The present application relates to the technical field of milling processing, in particular to a symmetrical drill bit and a milling equipment thereof, the cutter main body of the symmetrical drill bit is composed of a cutter bar, a cutter holder, a blade groove and a blade, the blade is provided in a triangular hexagonal structure, the circumferential side of the blade is provided with staggered distribution chip separation grooves, the surface of the blade is provided with closed loop chip breaking grooves, and the chip breaking grooves are internally fixed with chip removal points, the symmetrical drill bit will not vibrate during milling, and can effectively break the chips; the lifting part of the milling equipment comprises a cutter mounting mechanism and a lifting mechanism, the processing part comprises a feeding mechanism, a yaw mechanism for intermittently pushing the workpiece and a workpiece clamping mechanism for clamping and fixing the workpiece, the milling equipment can complete automatic clamping of the workpiece, drilling and automatic feeding of the workpiece in the process of reciprocating lifting of the cutter main body, the whole processing process is fully automated, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of milling technology, specifically a symmetrical drill bit and its milling equipment. Background Technology

[0002] In mechanical drilling and milling, milling cutters are often rotated at high speeds to achieve drilling and milling of the workpiece or object to be processed.

[0003] The prior art discloses Chinese patent with publication number CN 202155574 U: symmetrical blade high-efficiency and fast drilling, and discloses a drill bit body with a connector, a guide drill is set in the middle of the top of the drill bit body, and a blade is set at the edge of the top of the drill bit body. Through the symmetrical double blade design, drilling is fast and efficient.

[0004] However, the aforementioned existing technology still has certain drawbacks. In use, the use of a circular arc design for the cutting edge of the insert can easily cause vibration during milling, and the milling resistance is high, making chip breaking ineffective.

[0005] The prior art discloses Chinese Patent No. CN 113199052 A: Manifold Milling and Drilling Equipment, which discloses a cylinder, an arc block, a transverse block and a support mechanism. The output shaft of the cylinder can drive the arc block to move laterally to clamp and position the manifold, and the transverse block can provide solid support for the bottom of the manifold. At the same time, the support mechanism supports the transverse block during its movement, thereby improving the stability of the transverse block in supporting the manifold.

[0006] However, the aforementioned existing technologies still have certain drawbacks. In use, the workpiece clamping and positioning cannot be completed in one step during milling, and after a single processing cycle, manual material replacement is required, which reduces processing efficiency. Summary of the Invention

[0007] The purpose of this invention is to provide a symmetrical drill bit and its milling equipment to solve the problems mentioned in the background art.

[0008] The objective of this invention can be achieved through the following technical solutions:

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

[0010] The tool body consists of a tool holder, a tool holder fixed to one end of the tool holder, two blade slots located at the other end of the tool holder, and blades that can be detachably installed inside the blade slots. The two blade slots are centrally symmetrical about the axis of the tool holder.

[0011] A groove is provided at the axis of the tool holder to pass through the tool holder, and a hole is provided at the end of the tool holder corresponding to the position of the two blades, which is connected to the groove.

[0012] The blade is configured with a triangular hexagonal structure. Multiple chip-breaking grooves are provided on the circumferential side of the blade in a staggered arrangement, and a closed-loop chip-breaking groove is provided on the surface of the blade. Multiple chip-breaking points are fixed inside the chip-breaking groove.

[0013] The present invention also provides a milling device for mounting the above-mentioned symmetrical drill bits, the milling device comprising:

[0014] The lifting unit includes a tool mounting mechanism and a lifting mechanism for driving the tool mounting mechanism to reciprocate and lift. The tool body is detachably mounted on the bottom end of the tool mounting mechanism.

[0015] The processing unit includes a feeding mechanism, a tilting mechanism for intermittently pushing the supplied workpiece to the processing station, and a workpiece clamping mechanism for clamping and fixing the workpiece pushed to the processing station. The tilting mechanism and the workpiece clamping mechanism are linked by a lifting mechanism.

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

[0017] As a preferred embodiment of the milling equipment for the symmetrical drill bit of the present invention, the lifting mechanism includes an L-shaped frame fixed to the top of the base, a cylinder fixedly installed at the top of the horizontal section of the L-shaped frame, and two U-shaped slot frames 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 at the bottom of the lifting frame through a bearing, and a tool mounting mechanism is fixedly installed at the bottom of the shaft.

[0018] As a preferred embodiment of the milling equipment with the symmetrical drill bit of the present invention, the tool mounting mechanism includes a mounting plate fixedly connected to the bottom end of the shaft. The bottom of the mounting plate is provided with two fastening covers for fastening the tool holder. Both ends of the outer side of the two fastening covers are provided with a hoop groove and a liquid groove located between the two hoop grooves. A hoop ring is provided between the two corresponding hoop grooves for fixing the two fastening covers in the fastened state. A ring cover is movably sleeved on the outer side of the two fastening covers in the fastened state.

[0019] Both sides of the tool holder are provided with slots, and clamping blocks are fixedly installed inside the two clips. The side of the clamping block facing the tool holder is fixedly provided with a protrusion corresponding to the slot, and a connecting block is fixedly installed between the clamping block and the inner side of the corresponding clip.

[0020] As a preferred embodiment of the milling equipment for the symmetrical drill bit of the present invention, wherein: two slots are opened on the top of the opposite sides of the two buckles, and a pin is fixedly provided inside each slot, and a pin is fixedly connected to the end of the pin on one buckle, and a pin hole adapted to the corresponding pin is opened on the end of the pin on the other buckle.

[0021] Two corresponding slots form a slot frame. A through slot is opened through the top of the mounting plate, which is directly opposite the slot frame. A double extension cylinder is fixedly installed in the middle of the through slot. Both output ends of the double extension cylinder are fixedly connected to L-shaped fasteners that are slidably installed inside the corresponding through slots.

[0022] As a preferred embodiment of the milling equipment with symmetrical drill bit of the present invention, the tool mounting mechanism further includes a square column fixedly installed at the bottom of the lifting frame, a liquid inlet pipe fixedly installed on the square column, and the liquid outlet end of the liquid inlet pipe being connected to the cavity formed by the corresponding liquid groove positions on the ring cover and the buckle cover.

[0023] A rubber stopper is installed at the top of the trough, and a liquid supply pipe is fixedly installed through the center line of the rubber stopper. Arc grooves are opened on the opposite sides of the two covers at the positions corresponding to the liquid troughs. The liquid inlet end of the liquid supply pipe is inserted into the round hole formed by the two corresponding arc grooves.

[0024] As a preferred embodiment of the milling equipment with the symmetrical drill bit of the present invention, the workpiece clamping mechanism includes two L-shaped pressure rods fixed on the outside of the ring cover and vertical bars fixed on the top of the base located on both sides of the tool mounting mechanism. A horizontal bar is provided between the opposite sides of the two vertical bars, and a trapezoidal groove is opened on the top of the two horizontal bars, which is directly opposite to the corresponding L-shaped pressure rod.

[0025] Each of the two vertical bars has a fixed rod connected to one side facing each other. Each of the two horizontal bars has a groove at one end facing away from each other that matches the rod. The rod is movably inserted into the corresponding groove. Each of the two horizontal bars has a fixed V-shaped block connected to one end facing each other. Each rod has a straight spring on its outer side that is fixedly connected to the corresponding horizontal bar and vertical bar.

[0026] As a preferred embodiment of the milling equipment for the symmetrical drill bit of the present invention, the sway mechanism includes a fixed column and an L-shaped stop bar fixedly disposed on the top of the base. An annular cylinder is movably sleeved on the outside of the fixed column. A round rod and a material feeding assembly are fixedly disposed on the outside of the annular cylinder. A straight spring II is also sleeved on the outside of the annular cylinder. Both ends of the straight spring II are fixedly connected to strip blocks. The two strip blocks are respectively stopped and limited by the material feeding assembly and the L-shaped stop bar.

[0027] The oscillation 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 that limit the position of the straight plate are fixedly sleeved on the outside of the shaft. A trapezoidal plate is fixedly connected to one end of the straight plate, and a guide block that is slidably connected to the inside of the straight guide groove is fixedly provided on one side of the trapezoidal plate.

[0028] As a preferred embodiment of the milling equipment for the symmetrical drill bit of the present invention, the material feeding assembly includes a fixed seat fixedly connected to the ring cylinder, a groove is provided at one end of the fixed seat, a movable seat is hingedly installed inside the groove, and an arc rod that movably passes through the movable seat is fixedly provided inside the groove, and an arc spring is sleeved on the outside of the arc rod.

[0029] In a preferred embodiment of the milling equipment for the symmetrical drill bit of the present invention, the feeding mechanism includes a support and a track frame fixed on the top of the base. A material cylinder is fixedly connected to one end of the support, and a support plate is fixedly provided on the top of the support. A guide bar is fixedly provided on the top of the support plate, and the inner diameter of the material cylinder is smaller than the inner width of the track frame.

[0030] The beneficial effects of this invention are:

[0031] 1. By symmetrically installing the cutting blades, the symmetrical drill bit can be subjected to more uniform force during milling, making it less prone to vibration and improving milling quality. At the same time, by opening staggered chip grooves on the circumferential side of the cutting blades, the resistance encountered during milling is reduced. And by setting chip breaking points on the surface of the cutting blades, chip breaking can be assisted, thereby improving the tool life.

[0032] 2. This invention utilizes a lifting mechanism to intermittently drive the rotating tool body to reciprocate up and down. During the milling process of driving the tool body downward, the workpiece clamping mechanism is driven first to clamp and position the workpiece entering the designated station. During the upward reset of the tool body, the yaw mechanism is controlled to push the workpiece to be processed at the unloading station to the designated station for processing. The entire processing is fully automated, improving production efficiency.

[0033] 3. By setting the tool mounting mechanism to a snap-fit ​​structure, the present invention can improve the convenience of tool body assembly and disassembly, and at the same time enhance the stability of the tool body during milling. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a first-view overall structural schematic diagram of the symmetrical drill bit of the present invention;

[0036] Figure 2 This is a schematic diagram of the overall structure of the symmetrical drill bit of the present invention from a second perspective;

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

[0038] Figure 4 This is a schematic diagram of the blade structure of the symmetrical drill bit of the present invention;

[0039] Figure 5 This is a first-view overall structural schematic diagram of the milling equipment of the present invention;

[0040] Figure 6 This is a second-view overall structural schematic diagram of the milling equipment of the present invention;

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

[0042] Figure 8 This is a schematic diagram of the overall structure of the machining section of the milling equipment of the present invention;

[0043] Figure 9 This is the present invention. Figure 8 A first-person perspective partial structural diagram;

[0044] Figure 10 This is the present invention. Figure 8 A schematic diagram of the local structure from a second-view perspective;

[0045] Figure 11 This is the present invention. Figure 8 A schematic diagram of the local structure from a third-person perspective;

[0046] Figure 12 This is the present invention. Figure 9 Enlarged schematic diagram of section A in the middle;

[0047] Figure 13 This is a first-view schematic diagram of the disassembled tool mounting mechanism in the milling equipment of the present invention;

[0048] Figure 14 This is a second-view schematic diagram showing the disassembled tool mounting mechanism in the milling equipment of the present invention.

[0049] The attached figures are labeled as follows: 1. Tool holder; 11. Leakage hole; 12. Leakage groove; 2. Tool holder; 3. Tool groove; 4. Tool; 41. Chip divider; 42. Chip ejection 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. Groove; 78. Insert post; 79. Hoop ring; 710. Rubber stopper; 711. Liquid supply pipe; 712. Ring cover; 713. Through groove; 714. L-shaped buckle block; 715. Liquid inlet pipe; 716. Square column; 8 81. Workpiece clamping mechanism; 82. L-shaped pressure bar; 83. Vertical bar; 84. Horizontal bar; 85. Trapezoidal groove; 86. Insert rod; 97. Straight spring one; 98. Swinging mechanism; 99. Fixed column; 90. L-shaped stop bar; 91. Ring cylinder; 92. Straight spring two; 93. Strip block; 94. Material feeding assembly; 95. Fixed seat; 96. Groove; 97. Moving seat; 98. Arc rod; 99. Arc spring; 90. Round rod; 91. Straight plate; 910. Trapezoidal plate; 911. Guide block; 912. Restriction ring; 10. Feeding mechanism; 101. Support; 102. Track frame; 103. Pallet; 104. Material cylinder; 105. Guide bar. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] The symmetrical drill bit of the present invention belongs to a type of milling tool and is used to drill holes in target workpieces. It is generally used as an accessory tool for milling machine tools.

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

[0053] Refer to the instruction manual appendix Figures 1-4This embodiment is the first embodiment of the present invention, providing a symmetrical drill bit. The symmetrical drill bit includes a tool body, which consists of a tool shank 1, a tool holder 2 fixed to one end of the tool shank 1, two insert grooves 3 disposed at the other end of the tool shank 1, and inserts 4 detachably installed inside the insert grooves 3. The two insert grooves 3 are centrally symmetrical about the axis of the tool shank 1, which allows the two inserts 4 installed at the end of the tool shank 1 to be symmetrically installed, making the force on the symmetrical drill bit more uniform during milling. Furthermore, the symmetrical installation of the two inserts 4 not only results in high machining accuracy but also reduces the likelihood of vibration during milling.

[0054] A groove 12 that passes through the tool holder 2 is provided at the axis of the tool holder 1. A hole 11 connected to the groove 12 is provided at the end of the tool holder 1 corresponding to the position of the two cutting blades 4. This can form a double-sided equal-volume leakage structure, allowing the coolant to enter the milling position better and improving the cooling quality. In addition, the drilling end of the tool holder 1 is set to widen downward at a 30° angle at the position of the two cutting blade grooves 3, reducing the risk of tearing at the center drilling end of the tool holder 1.

[0055] The insert 4 is designed with a triangular hexagonal structure. The outer positive rake angle of the cutting edge of the insert 4 ensures the cutting sharpness, and the inner side adopts a widened flat edge to ensure that there is no chipping at low linear speeds. The insert 4 has multiple staggered chip grooves 41 on its circumferential side to avoid excessively long outer edges and reduce milling resistance. The surface of the insert 4 has a closed-loop chip breaking groove, and multiple chip breaking points 42 are fixed inside the chip breaking groove. The design of the chip breaking points 42 is conducive to chip breaking and can avoid the disadvantage of premature wear of the top surface of the chip roll of traditional U-drills.

[0056] It should be noted that the two blades 4 mentioned above are installed by symmetrically stacking two triangular hexagonal blades during the installation process, and the two blades 4 are generally installed with their corners staggered to achieve the effect of staggered chip separation.

[0057] Furthermore, the drill bit diameters of the aforementioned symmetrical drill bits range from 15 to 32 mm. An average of 2 mm of each bit uses the same type of insert.

[0058] Compared with traditional U-drills, the symmetrical drill bit of this invention uses symmetrical installation of the inserts 4, which makes the force more uniform during milling. Furthermore, when the inserts are perfectly symmetrically installed at the same speed and F value, the feed per tooth is uniform. Compared with the asymmetrical staggered installation of traditional U-drills, the actual feed thickness per tooth is half that of traditional U-drills, and a higher F value can be obtained, thus achieving higher processing efficiency. Compared with crown drills, the inserts of this product can be directly pressed into shape, making the manufacturing difficulty and cost much lower than that of crown drills. The drill rod is also easier to manufacture than that of crown drills. Example

[0059] Refer to the instruction manual appendix Figures 5-6 This embodiment is the second embodiment of the present invention, providing a milling device with a symmetrical drill bit. The milling device consists of a base 5 and a processing section and a lifting section mounted on the top of the base 5. The lifting section includes a tool mounting mechanism 7 and a lifting mechanism 6 for driving the tool mounting mechanism 7 to reciprocate and lift. The tool body is detachably mounted on the bottom end of the tool mounting mechanism 7. The processing section includes a feeding mechanism 10, a swing 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 swing mechanism 9 and the workpiece clamping mechanism 8 are linked through the lifting mechanism 6.

[0060] It should be noted that the present invention uses the lifting mechanism 6 to intermittently drive the rotating tool body to reciprocate up and down. During the milling process of the tool body moving downward to mill the workpiece, the workpiece clamping mechanism 8 is driven first to clamp and position the workpiece (the workpiece to be processed in the present invention is a cylindrical structure) that has entered the designated station. Then, during the process of driving the tool body to reset upward, the sway mechanism 9 is controlled to push the workpiece to be processed at the unloading station to the designated station to wait for processing. The entire processing process is fully automated, which improves production efficiency.

[0061] Furthermore, such as Figure 7 As shown, the lifting mechanism 6 includes an L-shaped frame 61 fixed to 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 installed at 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 guide rail formed by the two U-shaped slot frames 62 can be used to limit the lifting frame 63, reduce the amplitude of the lifting frame 63 during milling, and thus improve the stability of milling. 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 at the bottom of the lifting frame 63 through a bearing. The shaft is driven to rotate by a motor installed inside the lifting frame 63. The tool mounting mechanism 7 is fixedly installed at the bottom of the shaft.

[0062] It should be noted that during the process of driving the tool body, which is clamped on the tool mounting mechanism 7, to rotate and reciprocate, the cylinder 64 used is a single-acting cylinder of model DSA25N200, and the motor used is an asynchronous motor. The specific model can be selected according to the actual processing requirements.

[0063] Furthermore, such as Figure 8 and Figure 10As shown, the workpiece clamping mechanism 8 includes two L-shaped pressure rods 81 fixed on the tool mounting mechanism 7 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 opposite sides of the two vertical bars 82. A trapezoidal groove 84 is opened on the top of the two horizontal bars 83, which is directly opposite to the corresponding L-shaped pressure rod 81. The axial section of the trapezoidal groove 84 is a right trapezoid, and the inclined surfaces of the two trapezoidal grooves 84 are directly opposite each other.

[0064] Each of the two vertical bars 82 has a fixed insertion rod 85 on one side facing each other. Each of the two horizontal bars 83 has a groove at one end facing away from each other that matches the insertion rod 85. The insertion rod 85 is movably inserted into the corresponding groove. Each of the two horizontal bars 83 has a fixed V-block at one end facing each other. An anti-slip pad can be added to the side of the V-block facing the workpiece to improve the stability of clamping and positioning the workpiece. Each insertion rod 85 has a straight spring 86 fixedly connected to the corresponding horizontal bar 83 and vertical bar 82. During the elastic deformation of the straight spring 86, the end of the insertion rod 85 always remains movably inserted into the corresponding groove. Furthermore, when the straight spring 86 is in its natural state, the minimum distance between the two V-blocks is greater than the diameter of the workpiece to be processed.

[0065] It should be noted that during the milling process of the rotating tool body on the target workpiece, the relevant structure of the tool mounting mechanism 7 (see the relevant description in Embodiment 3 below) is designed to control the L-shaped pressure rod 81 to move only in the vertical direction. Specifically, during the milling process of the tool body clamped on the tool mounting mechanism 7 being pushed downwards by the cylinder 64 to mill the target workpiece, the L-shaped pressure rod 81 enters the trapezoidal groove 84 on the corresponding crossbar 83 during the synchronous downward movement with the tool mounting mechanism 7, and interacts with the inclined surface of the trapezoidal groove 84. The L-shaped pressure bar 81 makes contact with the target workpiece, and then as the L-shaped pressure bar 81 continues to feed downward, the L-shaped pressure bar 81 will gradually squeeze the inclined surface of the corresponding trapezoidal groove 84, allowing the crossbar 83 to gradually move towards 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 bar 81 passes through the corresponding trapezoidal groove 84, the two V-blocks that move in opposite directions complete the clamping and centering of the target workpiece. Then, the L-shaped pressure bar 81 continues to feed downward. At this time, the two crossbars 83 no longer move in opposite directions, and the rotating tool body will complete the milling of the target workpiece during this feeding process.

[0066] In the process of clamping and fixing the target workpiece, in order to improve the stability of the horizontal feed of the crossbar 83 during the pressing process of the L-shaped pressure bar 81, a support column for supporting the crossbar 83 can be fixed on the top of the base 5 (this is a further optimization scheme and is not specifically shown in the attached figure). The presence of this support column will not affect the pressing process of the L-shaped pressure bar 81.

[0067] Furthermore, such as Figure 5 and Figures 10-11 As shown, the feeding mechanism 10 includes a support 101 fixed to the top of the base 5 and a track frame 102. The track frame 102 consists of an arc segment and a horizontal segment. A through slot is provided in the middle of the arc segment of the track frame 102 for the pushing part of the sway mechanism 9 to move. A stop bar 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 pushing part of the sway mechanism 9. The support 101... One end of the support 101 is fixedly connected to a material cylinder 104, and a support plate 103 is fixedly provided on the top of the support 101. A guide bar 105 is fixedly provided on the top of the support plate 103. A material opening is provided at the top of the material cylinder 104 above the support plate 103. The width of the material opening is equal to the distance between the two guide bars 105 and slightly larger than the diameter of the target workpiece. The ends of the two guide bars 105 away from the material opening on opposite sides are flared to facilitate feeding. The inner diameter of the material cylinder 104 is smaller than the inner width of the track frame 102.

[0068] It should be noted that during the continuous feeding process, the target workpieces are first placed on the pallet 103 and pushed into the material cylinder 104 for stacking along the feeding channel formed by the two guide bars 105. The target workpiece at the bottom is completely removed from the material cylinder 104 and enters the interior of the track frame 102, waiting for the swing mechanism 9 to act on it and push it to the designated processing station.

[0069] Furthermore, such as Figures 7-9 and Figure 12 As shown, the sway mechanism 9 includes a fixed column 91 and an L-shaped stop bar 92 fixedly mounted on the top of the base 5. An annular cylinder 93 is movably sleeved on the outside of the fixed column 91. In order to prevent the annular cylinder 93 from detaching from the fixed column 91, a stop block can be fixedly mounted on the outside of the fixed column 91 at a position inside the annular cylinder 93. A limiting arc groove is opened on the inside of the annular cylinder 93, which is directly opposite to the stop block. The stop block is slidably connected to the inside of the limiting arc groove (not specifically shown in the attached figure). A round rod 97 and a feeding assembly 96 are fixedly mounted on the outside of the annular cylinder 93. A straight spring 94 is also sleeved on the outside of the annular cylinder 93. Both ends of the straight spring 94 are fixedly connected to strips 95. The two strips 95 are stopped and limited by the feeding assembly 96 and the L-shaped stop bar 92, respectively.

[0070] The sway 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 position of the straight plate 98. A trapezoidal plate 99 is fixedly connected to one end of the straight plate 98. A guide block 910 is fixedly slidably connected to the inside of the straight guide groove on one side of the trapezoidal plate 99. The setting of the limiting rings 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 strips 95 are fixedly connected to the corresponding feeding components 96 and L-shaped stop strips 92, respectively. In this way, it can be ensured that after the ring cylinder 93 is squeezed and deflected by the downward feeding trapezoidal plate 99, it can automatically reset under the restoring force of the straight spring 94.

[0071] Furthermore, the feeding assembly 96 includes a fixed seat 961 fixedly connected to the ring cylinder 93. The strip 95 fixedly connected to the feeding assembly 96 is also fixedly connected to the fixed seat 961. One end of the fixed seat 961 has a groove 962. A movable seat 963 is hingedly installed inside the groove 962. An arc rod 964, which movably passes through the movable seat 963, is also fixedly installed inside the groove 962. An arc spring 965 is sleeved on the outside of the arc rod 964. The relative position between the fixed seat 961 and the movable seat 963 when no external force is applied is described below. Figure 12 As shown, in this state, the moving seat 963 is blocked by the fixed seat 961 and cannot continue to swing to the right.

[0072] It should be noted that when the tool body is in the initial non-downward feeding state, the feeding component 96 is exactly at the end of the through slot on the track frame 102, and the feeding end of the feeding component 96 at this position is exactly in contact with the outside of the target workpiece entering the designated processing station (this state is to be set as the initial processing state). During the process of using the yaw mechanism 9 to push the target workpiece that has fallen from inside the material cylinder 104 into the track frame 102 to the designated processing station, when the rotating tool body is driven by the cylinder 64 to process the target workpiece pushed to the designated processing station, as the tool body... As the material gradually feeds downwards, it simultaneously drives the trapezoidal plate 99 connected to the end of the straight plate 98 to move downwards under the guidance of the straight guide groove. During this process, as the trapezoidal plate 99 gradually moves downwards, it gradually squeezes the round rod 97 on the outside of the ring cylinder 93, causing the ring cylinder 93 to rotate around the fixed column 91 as the central axis. At the same time, it drives the feeding assembly 96 to rotate synchronously with the ring cylinder 93. Since the position of the L-shaped stop bar 92 remains unchanged, the feeding assembly 96, which changes position during the rotation with the ring cylinder 93, will apply a thrust to the straight spring 94, allowing the straight spring 94 to store energy.

[0073] Meanwhile, as the feeding assembly 96 rotates synchronously with the ring cylinder 93, the feeding assembly 96 moves along the through groove towards the direction of disengaging from the through groove. When the moving seat 963 on the feeding assembly 96 moves to contact 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 bar placed at the inner end of the arc segment of the track frame 102. As the feeding assembly 96 continues to swing, the moving seat 963 will swing along the direction of the arc rod 964 with the central axis hinged to the fixed seat 961 as the base axis under the reverse thrust of the target workpiece, and compress the arc spring 965. When the moving seat 963 swings to the point of being misaligned with the target workpiece, the moving seat 963 will reset under the restoring force of the arc spring 965, waiting for the next round of feeding the target workpiece to enter the designated processing station.

[0074] As the rotating tool body, driven by cylinder 64, retracts after completing the milling process, the trapezoidal plate 99 gradually rises. The ring cylinder 93, under the restoring force of the straight spring 94, resets and rotates, simultaneously driving the material feeding assembly 96 towards the through-slot. Once the moving seat 963 on it moves into the through-slot and contacts the target workpiece, as the ring cylinder 93 continues to reset, the moving seat 963 pushes the target workpiece, which has fallen into the track frame 102, towards the designated machining station. During this process, the moving seat 963 moves to the right along the arc rod 964 (see...). Figure 12 The deflection causes the material feeding assembly 96 to push the target workpiece directly to the designated processing station during the reset process, waiting for the next round of milling.

[0075] It should be noted that during the above process, the rotating tool body first moves downwards to the drilling state, and then resumes normal continuous milling and automatic feeding. During this period, it is only necessary to ensure that there are enough target workpieces inside the material cylinder 104. Example

[0076] Refer to the instruction manual appendix Figure 10 and Figures 13-14 This embodiment is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that the tool mounting mechanism 7 includes a mounting plate 71 fixedly connected to the bottom end of the shaft. The bottom of the mounting plate 71 is provided with two buckle covers 72 for fastening the tool holder 2. Both ends of the outer side of the two buckle covers 72 are provided with a hoop groove 73 and a liquid groove 74 located between the two hoop grooves 73. A hoop ring 79 is provided between the two corresponding hoop grooves 73 for fixing the two buckle covers 72 in the buckling state. A ring cover 712 is movably sleeved on the outer side of the two buckle covers 72 in the buckling state. The two L-shaped pressure rods 81 mentioned above are fixed on the outer side of the ring cover 712. 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.

[0077] Both sides of the tool holder 2 are provided with slots, and each of the two retaining covers 72 is fixedly provided with a clamping block 75. The side of the clamping block 75 facing the tool holder 2 is fixedly provided with a protrusion 76 corresponding to the slot. When the two retaining covers 72 are fastened under the action of the clamping ring 79, the protrusion 76 is just fully inserted into the corresponding slot to clamp the tool holder 2. A connecting block is fixed between the clamping block 75 and the inner side of the corresponding retaining cover 72. The stability of clamping the tool holder 2 with the clamping block 75 can be enhanced by the connecting block.

[0078] Furthermore, each of the two buckle covers 72 has two slots 77 on its opposite top sides. Each slot 77 has a fixed insert post 78 inside. The end of the insert post 78 on one buckle cover 72 is fixedly connected to a pin, and the end of the insert post 78 on the other buckle cover 72 has a pin hole that matches the corresponding pin. When the two buckle covers 72 are fastened together under the action of the hoop 79, the pin is completely inserted into the corresponding pin hole.

[0079] Two corresponding slots 77 form a slot frame. The top of the mounting plate 71 has a through slot 713 that is directly opposite the slot frame. A double extension cylinder is fixedly installed in the middle of the cavity of the through slot 713. The double extension cylinder is a double extension rod type ESFD standard cylinder. Both output ends of the double extension cylinder are fixedly connected to L-shaped buckles 714 that are slidably installed inside the corresponding through slots 713. Each L-shaped buckle 714 has a through hole, and the insert 78 is movably inserted into the corresponding through hole.

[0080] Furthermore, the tool mounting mechanism 7 also includes a square column 716 fixedly installed at the bottom of the lifting frame 63. Specifically, the square column 716 and the lifting frame 63 are fixedly installed by locking bolts to facilitate the subsequent replacement of the tool body. A liquid inlet pipe 715 is fixedly installed on the square column 716. The liquid inlet pipe 715 is made of rigid hard material to better limit the relative position of the ring cover 712. The liquid outlet end of the liquid inlet pipe 715 is connected to the cavity formed by the position of the ring cover 712 and the corresponding liquid groove 74 on the buckle cover 72. The inner side of the ring cover 712 is provided with a sealing ring to prevent leakage at the upper and lower edges of the liquid groove 74.

[0081] A rubber stopper 710 is installed at the top of the trough 12. A liquid supply pipe 711 is fixedly installed through the center line of the rubber stopper 710. In this application, the liquid inlet pipe 715 is set as a T-shaped structure for related description. Arc grooves are opened at the positions of the liquid tank 74 on the opposite sides of the two buckles 72. Sealing rings are also fixedly installed inside the two arc grooves to prevent leakage. The liquid inlet end of the liquid supply pipe 711 is inserted into the round hole formed by the two arc grooves.

[0082] It should be noted that during the clamping process of the tool body, the two retaining covers 72 are pre-assembled with the mounting plate 71, that is, the inserts 78 on the retaining covers 72 are inserted into the through holes on the corresponding L-shaped retaining blocks 714 on the mounting plate 71. However, the two retaining covers 72 do not affect the insertion and installation position of the tool holder 2. After the pre-assembly between the two retaining covers 72 and the mounting plate 71 is completed, and the rubber plug 710 with the liquid supply pipe 711 is embedded in the groove 12 on the tool holder 2, the tool holder 2 is inserted between the two retaining covers 72, so that... The slots on both sides of the tool holder 2 correspond one-to-one with the protrusions 76 on the inner side of the clip 72, and make the two liquid inlet ends of the liquid supply pipe 711 aligned with the arc groove on the clip 72. Then, fasten the two clips 72 to complete the pre-assembly of the tool body. Next, use the clamping ring 79 to fasten the upper end of the clip 72. Then insert the ring cover 712 from the lower end of the clip 72 into the space between the two sets of clamping grooves 73. Use the clamping ring 79 to fasten the lower end of the ring cover 72 to complete the fixation of the relative position of the ring cover 712. In this way, the clamping of the tool body can be completed.

[0083] After the tool body is installed, if the milling equipment is to be used for milling, before starting, the two corresponding L-shaped latches 714 need to be pushed synchronously by the double extension cylinder to move in opposite directions until the four L-shaped latches 714 are fully engaged with the latch cover 72. This ensures that the tool body rotates stably. During the milling process, coolant needs to be continuously replenished through the inlet pipe 715 and allowed to pass through the supply pipe 711 and the drain 12 in sequence before being discharged from the milling area of ​​the cutting tool 4 corresponding to the tooth through the two drain holes 11 on the tool holder 1, thereby improving the stability of the tool body during the milling process.

[0084] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A milling device with symmetrical drill bits, characterized in that, The cutting head includes: The tool body consists of a tool holder (1), a tool holder (2) fixed at one end of the tool holder (1), two blade slots (3) set at the other end of the tool holder (1), and a blade (4) detachably installed inside the blade slots (3). The two tool holders (2) are centrally symmetrical about the axis of the tool holder (1). The tool holder (1) has a groove (12) that passes through the tool holder (2) at the center line position, and a hole (11) that communicates with the groove (12) is opened at the end of the tool holder (1) corresponding to the two blades (4). The blade (4) is configured as a triangular hexagonal structure. Multiple chip-breaking grooves (41) are provided on the circumferential side of the blade (4) in a staggered manner, and a closed-loop chip-breaking groove is provided on the surface of the blade (4). Multiple chip-breaking points (42) are fixed inside the chip-breaking groove. The symmetrical drill bit is mounted on a milling machine, which includes: The lifting part includes a tool mounting mechanism (7) and a lifting mechanism (6) for driving the tool mounting mechanism (7) to reciprocate and lift. The tool body is detachably mounted on the bottom end of the tool mounting mechanism (7). The lifting mechanism (6) includes 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 installed at 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 at the bottom of the lifting frame (63) through a bearing. A tool mounting mechanism (7) is fixedly installed at the bottom of the shaft. The processing unit includes a feeding mechanism (10), a sway mechanism (9) for intermittently pushing the supplied workpiece to the processing station, and a workpiece clamping mechanism (8) for clamping and fixing the workpiece pushed to the processing station. The sway mechanism (9) and the workpiece clamping mechanism (8) are linked by a lifting mechanism (6). The sway mechanism (9) includes a fixed column (91) and an L-shaped stop bar (92) fixedly installed on the top of the base (5). A ring cylinder (93) is movably sleeved on the outside of the fixed column (91). A round rod (97) and a feeding assembly (96) are fixedly installed on the outside of the ring cylinder (93). A straight spring (94) is also sleeved on the outside of the ring cylinder (93). Both ends of the straight spring (94) are fixedly connected to strips (95). The two strips (95) are stopped and limited by the feeding assembly (96) and the L-shaped stop bar (92) respectively. The sway 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) for limiting the straight plate (98) are fixedly sleeved on the outside of the shaft. A trapezoidal plate (99) is fixedly connected to one end of the straight plate (98). A guide block (910) that is slidably connected to the inside of the straight guide groove is fixedly provided on one side of the trapezoidal plate (99). The feeding assembly (96) includes a fixed seat (961) fixedly connected to the ring cylinder (93). A groove (962) is provided at one end of the fixed seat (961). A movable seat (963) is hinged inside the groove (962). An arc rod (964) that movably passes through the movable seat (963) is also fixedly provided inside the groove (962). An arc spring (965) is sleeved on the outside of the arc rod (964). The base (5) is equipped with both the lifting part and the processing part on the top of the base (5).

2. The milling equipment with a symmetrical drill bit according to claim 1, characterized in that, The tool mounting mechanism (7) includes a mounting plate (71) fixedly connected to the bottom end of the shaft. The bottom of the mounting plate (71) is provided with two fastening covers (72) for fastening the tool holder (2). Both ends of the outer side of the two fastening covers (72) are provided with a hoop groove (73) and a liquid groove (74) located between the two hoop grooves (73). A hoop ring (79) is provided between the two corresponding hoop grooves (73) for fixing the two fastening covers (72) in the fastened state. A ring cover (712) is movably sleeved on the outer side of the two fastening covers (72) in the fastened state. The tool holder (2) has slots on both sides, and clamping blocks (75) are fixedly installed inside the two clips (72). The side of the clamping block (75) facing the tool holder (2) is fixedly provided with a protrusion (76) corresponding to the slot, and a connecting block is fixedly provided between the clamping block (75) and the inner side of the corresponding clip (72).

3. The milling equipment with a symmetrical drill bit according to claim 2, characterized in that, Two slots (77) are opened on the top of opposite sides of the two buckle covers (72). Each slot (77) is fixedly provided with a pin (78). The end of the pin (78) on one buckle cover (72) is fixedly connected with a pin rod, and the end of the pin (78) on the other buckle cover (72) is provided with a pin hole that matches the corresponding pin rod. Two corresponding slots (77) form a slot frame. The top of the mounting plate (71) is provided with a through slot (713) that is directly opposite to the slot frame. A double extension cylinder is fixedly installed in the middle of the cavity of the through slot (713). Both output ends of the double extension cylinder are fixedly connected to L-shaped buckles (714) that are slidably installed inside the corresponding through slot (713).

4. The milling equipment with a symmetrical drill bit according to claim 3, characterized in that, The tool mounting mechanism (7) also includes a square column (716) fixedly installed at the bottom of the lifting frame (63). An inlet pipe (715) is fixedly installed on the square column (716). The outlet end of the inlet pipe (715) is connected to the cavity formed by the corresponding liquid groove (74) on the ring cover (712) and the buckle cover (72). A rubber plug (710) is installed at the top of the trough (12). A liquid supply pipe (711) is fixedly installed through the center line of the rubber plug (710). Arc grooves are opened at the positions of the liquid tank (74) on the opposite sides of the two covers (72). The liquid inlet end of the liquid supply pipe (711) is inserted into the round hole formed by the two arc grooves.

5. A milling device with a symmetrical drill bit according to claim 2, characterized in that, The workpiece clamping mechanism (8) includes 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) 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), and a trapezoidal groove (84) is opened on the top of the two horizontal bars (83) to be directly opposite to the corresponding L-shaped pressure rod (81). Each of the two vertical bars (82) has a fixed rod (85) on one side opposite to the other. Each of the two horizontal bars (83) has a groove at one end opposite to the rod (85) that is compatible with the rod. The rod (85) is movably inserted into the corresponding groove. Each of the two horizontal bars (83) has a fixed V-block at one end opposite to the other. Each rod (85) has a straight spring (86) on the outside that is fixedly connected to the corresponding horizontal bar (83) and vertical bar (82).

6. The milling equipment with a symmetrical drill bit according to claim 1, characterized in that, The feeding mechanism (10) includes 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 material cylinder (104), and a support plate (103) is fixedly provided on the top of the support (101). A guide bar (105) is fixedly provided on the top of the support plate (103). The inner diameter of the material cylinder (104) is smaller than the inner width of the track frame (102).

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