A replaceable milling cutter with a positioning and limiting structure

Abstract

This utility model discloses a replaceable milling insert with a positioning and limiting structure, specifically relating to the field of milling insert technology. It includes multiple milling insert bodies and fixing bolts mounted on a tool holder. The top surface of the tool holder has multiple mounting slots, and one side of each mounting slot has a connecting hole. A first silicone pad is attached to the side of the mounting slot that contacts the milling insert body. In practical operation, the replaceable milling insert with the positioning and limiting structure of this utility model involves inserting a positioning rod into the positioning hole of the milling insert body and a limiting rod into the limiting hole of the milling insert body to position and limit the milling insert body. The milling insert body is then fixed by the fixing bolts. The first and second silicone pads then contact the milling insert body. The high damping characteristics of the silicone convert vibration kinetic energy into heat energy, effectively resisting vibration and preventing the milling insert body from loosening due to vibration, thus affecting the machining effect.

Description

Technical Field

[0001] This utility model relates to the field of milling insert technology, and in particular to a replaceable milling insert with a positioning and limiting structure. Background Technology

[0002] A milling cutter is a rotating cutting tool with one or more cutting teeth used for milling operations. During operation, each cutting tooth cuts off the excess material of the workpiece in turn. Milling cutters are mainly used on milling machines to machine planes, steps, grooves, shaped surfaces, and cut off workpieces. A number of milling inserts are provided on the milling cutter.

[0003] A search revealed, for example, a utility model with publication number CN222288910U, which discloses a replaceable milling insert with a positioning and limiting structure. The insert includes a tool holder, with several mounting components fixedly connected to the front of its outer surface. These mounting components are arranged in a circular array around the center of the tool holder, and each mounting component has a connecting component snapped onto its right end. When the milling insert is in use, it vibrates. Prolonged exposure to vibration can cause the insert to loosen, affecting machining performance. However, this utility model does not provide vibration damping for the insert. Therefore, to address these shortcomings, the inventor proposes a replaceable milling insert with a positioning and limiting structure. Utility Model Content

[0004] The main purpose of this utility model is to provide a replaceable milling cutter with a positioning and limiting structure, which can effectively solve the problem that it is inconvenient to make the milling cutter resistant to vibration in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A replaceable milling cutter with a positioning and limiting structure includes multiple milling cutter bodies and fixing bolts disposed on a tool holder. The top surface of the tool holder has multiple mounting slots, and one side of the mounting slot has a connecting hole. A first silicone pad is attached to the side of the mounting slot that contacts the milling cutter body. Second silicone pads are attached to both the left and right sides of the mounting slot. Two positioning rods for positioning and limiting the milling cutter body are fixedly installed on one side of the mounting slot.

[0007] Preferably, neodymium iron boron magnets are embedded at the ends of the two positioning rods away from the mounting groove, and two positioning holes are opened on one side of the milling cutter body, with each positioning hole corresponding to one of the two positioning rods.

[0008] Preferably, a magnetic steel plate is fixedly installed on the inner bottom surface of both positioning holes, and a polytetrafluoroethylene bushing is fixedly installed on the inner wall of both positioning holes, and a limit hole is opened on the side of the milling cutter body.

[0009] Preferably, the inner bottom surface of the mounting groove is provided with a movable hole, a spring is fixedly installed on the inner bottom surface of the movable hole, a limit rod is slidably connected inside the movable hole, and the bottom end of the limit rod is fixedly connected to the top end of the spring.

[0010] Preferably, a guide hole is provided on one side of the movable hole, and a lever is fixedly installed on one side of the outer surface of the limiting rod, and the lever extends to the outside of the movable hole through the guide hole.

[0011] Preferably, the end of the lever located outside the movable hole is hinged to a connecting block, and a fixing hole is provided on one side of the connecting block. The knife holder is rotatably connected to two fixing blocks on one side of the mounting groove.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model discloses a replaceable milling cutter with a positioning and limiting structure. By setting an installation groove, in actual operation, the positioning rod is inserted into the positioning hole of the milling cutter body, and the limiting rod is inserted into the limiting hole of the milling cutter body to position and limit the milling cutter body. Then, the milling cutter body is fixed by fixing bolts. The first silicone pad and the second silicone pad will then contact the milling cutter body. The high damping characteristics of silicone will convert the vibration kinetic energy into heat energy, thereby effectively resisting vibration of the milling cutter body and effectively preventing the milling cutter body from loosening due to vibration, which would affect the processing effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the mounting groove structure of this utility model;

[0016] Figure 3 For the present utility model Figure 2 Enlarged view of section A in the middle;

[0017] Figure 4 This is a schematic diagram of the milling cutter body structure of this utility model;

[0018] Figure 5 This is a side view of the tool holder structure of this utility model;

[0019] Figure 6 For the present utility model Figure 5 Enlarged view of section B in the middle;

[0020] Figure 7 This is a front view schematic diagram of the tool holder structure of this utility model;

[0021] Figure 8 For the present utility model Figure 7 Enlarged view of section C.

[0022] In the diagram: 1. Tool holder; 2. Milling cutter body; 3. Fixing bolt; 101. Mounting groove; 102. First silicone pad; 103. Connecting hole; 104. Second silicone pad; 105. Positioning rod; 106. Neodymium iron boron magnet; 201. Limiting hole; 202. Positioning hole; 203. Polytetrafluoroethylene bushing; 204. Magnetic steel plate; 1021. Movable hole; 1022. Limiting rod; 1023. Spring; 1024. Guide hole; 1025. Lever; 1026. Connecting block; 1027. Fixing hole; 1028. Fixing block. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] This utility model discloses a replaceable milling cutter with a positioning and limiting structure, such as Figure 1-8 As shown, the tool includes multiple milling cutter bodies 2 and fixing bolts 3 mounted on the tool holder 1. The tool holder 1 is mounted on the spindle of the machine tool. The milling cutter is driven to rotate at high speed by the machine tool spindle. The milling cutter forms a continuous cutting trajectory. The milling cutter moves along the X / Y / Z axis directions to achieve continuous material removal. When the milling cutter contacts the workpiece, it generates shear stress, which peels off the material to form chips.

[0025] The top surface of the tool holder 1 is provided with multiple mounting slots 101, and a connecting hole 103 is provided on one side of the mounting slot 101. The inner wall of the connecting hole 103 is provided with threads so as to cooperate with the fixing bolt 3 to fix the milling cutter body 2 in the mounting slot 101. The number of mounting slots 101 is the same as the number of milling cutter bodies 2.

[0026] A first silicone pad 102 is attached to the side of the mounting groove 101 that contacts the end mill cutter body 2. Second silicone pads 104 are attached to both sides of the mounting groove 101. When the end mill cutter body 2 is fixed in the mounting groove 101, it will come into contact with the first silicone pad 102 and the second silicone pad 104. The silicone molecular chains of the first silicone pad 102 and the second silicone pad 104 have high entropy elasticity and undergo reversible deformation when compressed, absorbing impact energy. The internal friction of the silicone converts the vibration kinetic energy into heat energy. The viscoelasticity of the silicone causes it to generate viscous resistance under dynamic load, suppressing high-frequency vibration.

[0027] When pasting the first silicone pad 102 and the second silicone pad 104, select high-temperature resistant and highly elastic silicone pads and use high-temperature resistant epoxy resin adhesive. Then you can proceed with the installation. First, wipe the bottom and side walls of the mounting groove 101 with anhydrous alcohol to remove oil, chips and dust. Then, lightly sand the bottom of the groove with sandpaper to increase the adhesion of the adhesive and blow it dry with compressed air to ensure that the surface is free of moisture.

[0028] Cut the silicone pad according to the dimensions of the mounting slot 101. Apply a thin layer of adhesive to the back of the silicone pad to avoid overflow. Apply adhesive evenly to the bottom and side walls of the mounting slot 101. Align the silicone pad with the slot and use a plastic scraper to push it evenly from the center to the edge to remove air bubbles. Then wait for the adhesive to cure.

[0029] Two positioning rods 105 for positioning and limiting the milling cutter body 2 are fixedly installed on one side of the mounting slot 101.

[0030] Both positioning rods 105 have neodymium iron boron magnets 106 embedded at the ends away from the mounting groove 101. Two positioning holes 202 are opened on one side of the milling cutter body 2, and the two positioning holes 202 correspond one-to-one with the two positioning rods 105. The positioning rods 105 are inserted into the positioning holes 202 to position and limit the milling cutter body 2 so that the milling cutter body 2 can be fixed by the fixing bolts 3.

[0031] A magnetic steel plate 204 is fixedly installed on the inner bottom surface of both positioning holes 202. When the positioning hole 202 gradually approaches the positioning rod 105, the magnetic attraction between the neodymium iron boron magnet 106 and the magnetic steel plate 204 provides the initial attraction force, guiding the positioning rod 105 to quickly align, so as to speed up the insertion of the positioning rod 105 into the positioning hole 202.

[0032] Furthermore, polytetrafluoroethylene (PTFE) bushings 203 are fixedly installed on the inner walls of both positioning holes 202. The surface of the PTFE bushings 203 is impregnated with molybdenum disulfide, which forms a transfer film during friction for continuous lubrication. The surfaces of both positioning rods 105 are coated with diamond-like carbon (DLC) coating. The ultra-high hardness and low friction characteristics of the DLC coating reduce metal-to-metal contact. By setting PTFE bushings 203 impregnated with molybdenum disulfide inside the positioning holes 202 and coating the surfaces of the positioning rods 105 with DLC coating, the frictional force when the positioning rods 105 are inserted into the positioning holes 202 can be effectively reduced.

[0033] The side of the milling cutter body 2 has a limiting hole 201, and a through hole is provided in the middle of one side of the milling cutter body 2.

[0034] The inner bottom surface of the mounting groove 101 is provided with a movable hole 1021. A spring 1023 is fixedly installed on the inner bottom surface of the movable hole 1021. A limit rod 1022 is slidably connected inside the movable hole 1021, and the bottom end of the limit rod 1022 is fixedly connected to the top end of the spring 1023. When the limit rod 1022 moves into the movable hole 1021, it will squeeze the spring 1023. When the limit rod 1022 is inserted into the limit hole 201, it can cooperate with the positioning rod 105 and the positioning hole 202 to position and limit the milling cutter body 2.

[0035] A guide hole 1024 is provided on one side of the movable hole 1021. A lever 1025 is fixedly installed on one side of the outer surface of the limiting rod 1022. When the operator pushes the lever 1025, the limiting rod 1022 can be moved. The lever 1025 extends to the outside of the movable hole 1021 through the guide hole 1024. A connecting block 1026 is hinged to one end of the lever 1025 outside the movable hole 1021. A fixing hole 1027 is provided on one side of the connecting block 1026. Two fixing blocks 1028 are rotatably connected to one side of the tool holder 1 located in the mounting groove 101. One of the two fixing blocks 1028 is located above the guide hole 1024, and the other is located below the guide hole 1024.

[0036] The fixing block 1028 passes through the fixing hole 1027. The operator rotates the fixing block 1028 so that it does not coincide with the fixing hole 1027, thereby restricting the movement of the lever 1025 and the limit rod 1022, so as to fix the moved limit rod 1022.

[0037] The working principle of this utility model is as follows: First, the operator manually pushes the lever 1025, which causes the limiting lever 1022 to move towards the interior of the movable hole 1021, so that the limiting lever 1022 compresses the spring 1023. Then, the operator manually rotates the connecting block 1026, so that the fixing block 1028 located below the guide hole 1024 is inserted into the fixing hole 1027, and the fixing block 1028 is rotated so that it does not coincide with the fixing hole 1027.

[0038] Then, the milling cutter body 2 is placed in the mounting slot 101. As the positioning hole 202 gradually approaches the positioning rod 105, the magnetic attraction between the neodymium iron boron magnet 106 and the magnetic steel plate 204 provides the initial attraction force, guiding the positioning rod 105 to quickly align, so that the two positioning rods 105 are inserted into the two positioning holes 202, and the milling cutter body 2 will then contact the first silicone pad 102 and the second silicone pad 104.

[0039] The operator manually rotates the fixing block 1028, which passes through the fixing hole 1027, to make it coincide with the fixing hole 1027. Then, the operator rotates the connecting block 1026 again to pull the fixing block 1028 out of the fixing hole 1027. At this time, the compressed spring 1023 will push the limiting rod 1022 to reset, so that the limiting rod 1022 is inserted into the limiting hole 201 of the milling cutter body 2. Then, the operator manually rotates the connecting block 1026 to insert the fixing block 1028, which is located above the guide hole 1024, into the fixing hole 1027, and rotates the fixing block 1028 so that it does not coincide with the fixing hole 1027.

[0040] Insert the fixing bolt 3 into the overlapping connecting hole 103 and the through hole of the milling cutter body 2 to complete the installation of the milling cutter body 2. Then repeat the above steps to install multiple milling cutter bodies 2 in sequence.

[0041] When the milling cutter body 2 is subjected to vibration during operation, the high damping characteristics of the first silicone pad 102 and the second silicone pad 104 convert the vibration kinetic energy into heat energy, which can effectively resist vibration of the milling cutter body 2.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A replaceable milling cutter with a positioning and limiting structure, comprising a plurality of milling cutter bodies (2) disposed on a cutter holder (1) and fixing bolts (3), characterized in that: The top surface of the tool holder (1) is provided with multiple mounting slots (101), and a connecting hole (103) is provided on one side of the mounting slot (101). A first silicone pad (102) is attached to the side of the mounting slot (101) that contacts the milling cutter body (2). A second silicone pad (104) is attached to both the left and right sides of the mounting slot (101). Two positioning rods (105) for positioning and limiting the milling cutter body (2) are fixedly installed on one side of the mounting slot (101).

2. The replaceable milling cutter with a positioning and limiting structure according to claim 1, characterized in that: Neodymium iron boron magnets (106) are embedded at the ends of the two positioning rods (105) away from the mounting groove (101). Two positioning holes (202) are opened on one side of the milling cutter body (2), and the two positioning holes (202) correspond one-to-one with the two positioning rods (105).

3. A replaceable milling cutter with a positioning and limiting structure according to claim 2, characterized in that: A magnetic steel plate (204) is fixedly installed on the inner bottom surface of both positioning holes (202), and a polytetrafluoroethylene bushing (203) is fixedly installed on the inner wall of both positioning holes (202). A limit hole (201) is opened on the side of the milling cutter body (2).

4. A replaceable milling cutter with a positioning and limiting structure according to claim 1, characterized in that: The mounting groove (101) has an openable hole (1021) on its inner bottom surface. A spring (1023) is fixedly installed on the inner bottom surface of the openable hole (1021). A limit rod (1022) is slidably connected inside the openable hole (1021), and the bottom end of the limit rod (1022) is fixedly connected to the top end of the spring (1023).

5. A replaceable milling cutter with a positioning and limiting structure according to claim 4, characterized in that: A guide hole (1024) is provided on one side of the movable hole (1021), and a lever (1025) is fixedly installed on one side of the outer surface of the limiting rod (1022), and the lever (1025) extends to the outside of the movable hole (1021) through the guide hole (1024).

6. A replaceable milling cutter with a positioning and limiting structure according to claim 5, characterized in that: The lever (1025) is hinged to a connecting block (1026) at one end outside the movable hole (1021), and a fixing hole (1027) is provided on one side of the connecting block (1026). The knife holder (1) is rotatably connected to two fixing blocks (1028) on one side of the mounting groove (101).

Images