Round nose milling cutter

Abstract

The round nose milling cutter comprises a columnar cutter body and a blade body installed at one end of the cutter body in the length direction, one side of the blade body in the width direction is installed on the cutter body, a blade is arranged at the end, away from the cutter body, of the blade body, an installation bolt is arranged between the blade body and the cutter body, and the blade body is detachably installed on the cutter body through the installation bolt. The method has the effect of reducing the machining deviation generated after the tool is abraded.

Description

Technical Field

[0001] This application relates to the field of milling cutters, and particularly to a round nose milling cutter. Background Art

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

[0003] Currently, in the design of some parts, arc transition edges of different sizes are designed at the root of the cavity. These arc transition edges are generally machined using round nose milling cutters. When a round nose milling cutter processes a part, the cutting edge of the tool is prone to wear, resulting in deviations in the accuracy and dimensions of the workpiece. Therefore, when the tool is damaged, it needs to be sharpened again before it can be used continuously. However, after re-sharpening, the position of the cutting edge is deviated from the original position, still prone to causing deviations in the accuracy and dimensions of the machined workpiece. Utility Model Content

[0004] In order to reduce the machining deviation caused by tool wear, this application provides a round nose milling cutter.

[0005] The round nose milling cutter provided by this application adopts the following technical solution:

[0006] A round nose milling cutter includes a columnar tool body and a cutting edge body installed at one end of the tool body in the length direction. One side in the width direction of the cutting edge body is installed on the tool body. A cutting edge is opened at one end of the cutting edge body away from the tool body. An installation bolt is provided between the cutting edge body and the tool body, and the cutting edge body is detachably installed on the tool body through the installation bolt.

[0007] By adopting the above technical solution, the detachable setting of the cutting edge body can reduce the probability of machining deviation caused by tool wear by replacing the cutting edge body after the cutting edge on the cutting edge body wears, and there is no need to replace the entire milling cutter, saving resources.

[0008] Optionally, an adjustment groove is opened on the cutting edge body, the installation bolt is slidably arranged in the adjustment groove, and the installation bolt passes through the adjustment groove and is threadedly connected to the tool body.

[0009] By adopting the above technical solution, the opening of the adjustment groove can adjust the distance that the cutting edge body extends out of the tool body, so that when the cutting edge on the cutting edge body wears and is re-sharpened, the cutting edge can be adjusted to the original position to reduce the machining deviation caused by tool wear.

[0010] Optionally, the installation bolt is countersunk on the cutting edge body.

[0011] By adopting the above technical solution, the countersunk installation bolt can protect the installation bolt and reduce the probability of damage to the installation bolt caused by external impact.

[0012] Optionally, a discharge groove is provided at one end of the cutter body for installing the cutting edge corresponding to the cutting edge installation position.

[0013] By adopting the above technical solution, the opening of the discharge groove can facilitate the discharge of milling waste during milling.

[0014] Optionally, a plurality of clamping strips are circumferentially and evenly inserted at one end of the cutter body away from the installation cutting edge.

[0015] By adopting the above technical solution, the setting of the clamping strips can increase the surface roughness of the cutter body, thus facilitating the clamping and installation of the cutter body.

[0016] Optionally, the clamping strips are slidably arranged on the cutter body. The clamping strips slide towards or away from the center of the cutter body, and the clamping strips extend out of the side wall of the cutter body through sliding. A butting mechanism is arranged at the center of one end of the cutter body away from the cutting edge, and the butting mechanism abuts against the side of the clamping strips facing the center of the cutter body.

[0017] By adopting the above technical solution, the slidable arrangement of the clamping strips can facilitate the clamping of cutters with different sizes by milling cutter fixtures.

[0018] Optionally, the butting mechanism includes a wedge surface, a butting block and a driving member. The wedge surface is provided at one end of the clamping strip facing the center of the cutter body. The butting block abuts against the wedge surfaces of all the clamping strips. The driving member drives the butting block to slide, and the length of the clamping strip extending out of the cutter body is driven by the sliding of the butting block.

[0019] By adopting the above technical solution, the butting mechanism is used to adjust the distance of the clamping strip extending out of the cutter body and also provides support for the clamping strip.

[0020] Optionally, an anti - detachment block is fixed on the clamping strip, and an anti - detachment sliding groove is provided on the cutter body. The anti - detachment block is slidably arranged in the anti - detachment sliding groove.

[0021] By adopting the above technical solution, the setting of the anti - detachment block can reduce the probability of the clamping strip slipping off the cutter body.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The detachable setting of the cutting edge can, after the cutting edge on the cutting edge is worn, reduce the probability of machining deviation caused by tool wear by replacing the cutting edge, and there is no need to replace the entire milling cutter, saving resources;

[0024] 2. The provision of the adjustment groove can adjust the distance that the blade body extends out of the tool body, so that when the cutting edge on the blade body is worn, after regrinding the cutting edge, it can be adjusted to the original position to reduce the machining deviation caused by tool wear;

[0025] 3. The provision of the discharge groove can facilitate the discharge of milling waste during milling;

[0026] 4. The slidable setting of the clamping strip can facilitate the clamping of the tool by milling cutter jigs of different sizes;

[0027] 5. The provision of the anti - detachment block can reduce the probability of the clamping strip slipping off the tool body. Description of the Drawings

[0028] Figure 1 is a schematic diagram of the overall structure of this embodiment.

[0029] Figure 2 is a partial cross - sectional view of the overall structure of this embodiment.

[0030] Description of the reference signs: 1, tool body; 2, blade body; 3, cutting edge; 4, mounting bolt; 5, adjustment groove; 6, discharge groove; 7, clamping strip; 8, abutting mechanism; 81, wedge surface; 82, abutting block; 83, driving member; 9, anti - detachment block; 10, anti - detachment sliding groove. Detailed Description of the Embodiment

[0031] The following is a more detailed description of the present application in conjunction with the attached Figure 1-2 drawings.

[0032] The embodiment of the present application discloses a round - nose milling cutter. Referring to Figure 1 , it includes a cylindrical tool body 1 and two blade bodies 2 installed at one end of the tool body 1 in the length direction. In this embodiment, the tool body 1 is made of tungsten steel, and the blade body 2 is made of diamond in this embodiment. The two blade bodies 2 are respectively arranged on both circumferential sides of the tool body 1. One side in the width direction of the blade body 2 is installed on the tool body 1. A cutting edge 3 is opened at one end of the blade body 2 away from the tool body 1. In this embodiment, a chamfer is opened at the cutting edge 3, so as to facilitate the milling of the inner arc on the workpiece. When the tool body 1 rotates, it drives the blade body 2 to rotate, so that the blade body 2 approaches the workpiece to be milled, and the workpiece is milled by the cutting edge 3. An installation bolt 4 is arranged between the blade body 2 and the tool body 1. The blade body 2 is detachably installed on the tool body 1 through the installation bolt 4. In this embodiment, three installation bolts 4 are evenly arranged along the length direction of the blade body 2 on the blade body 2. The detachable setting of the blade body 2 can reduce the probability of machining deviation caused by tool wear by replacing the blade body 2 after the cutting edge 3 on the blade body 2 is worn, without the need to replace the entire milling cutter, thus saving resources.

[0033] Referring to Figure 1An adjusting groove 5 is provided on the blade body 2, and the adjusting groove 5 is a waist-shaped groove. The mounting bolt 4 is slidably set in the adjusting groove 5. The mounting bolt 4 passes through the adjusting groove 5 and is threadedly connected to the blade body 1. The opening of the adjusting groove 5 can adjust the distance that the blade body 2 extends out of the blade body 1, so that the blade 3 on the blade body 2 is worn. After re-sharpening, the blade 3 can be adjusted to the original position to reduce the processing deviation caused by tool wear; the mounting bolt 4 is a hexagon socket bolt, and the mounting bolt 4 is countersunk on the blade body 2. The mounting bolt 4 with a countersunk head can protect the mounting bolt 4 and reduce the probability of the mounting bolt 4 being damaged by external force. At the same time, when installing two blade bodies 2, it can prevent the mounting bolt 4 from affecting the installation of the opposite blade body 2.

[0034] Reference Figure 1 A discharge groove 6 is provided at one end of the cutter body 1 where the blade body 2 is installed, corresponding to the installation position of the blade body 2. In this embodiment, two discharge grooves 6 are arranged corresponding to the blade body 2. After the blade 3 mills the workpiece, the waste generated by milling will leave the milling cutter and the workpiece along the discharge groove 6, thereby reducing the impact of the milling waste on subsequent milling.

[0035] Reference Figure 1 and Figure 2 A plurality of clamping strips 7 are evenly inserted in the circumferential direction of the end of the cutter body 1 away from the blade body 2. In this embodiment, six clamping strips 7 are arranged; the clamping strips 7 are slidably arranged on the cutter body 1, and the clamping strips 7 slide toward or away from the center of the cutter body 1. The clamping strips 7 extend out of the side wall of the cutter body 1 by sliding. An abutment mechanism 8 is arranged at the center of the end of the cutter body 1 away from the blade body 2, and the abutment mechanism 8 abuts against the side of the clamping strip 7 toward the center of the cutter body 1; the abutment mechanism 8 includes a wedge-shaped surface 81 provided at the end of the clamping strip 7 toward the center of the cutter body 1, an abutment block 82 abutting against the wedge surfaces 81 of all the clamping strips 7, and a driving member 83 for driving the abutment block 82 to slide, wherein the abutment block 82 is a conical block, and the driving member 83 drives the abutment block 82 to slide. The movable part 83 is a driving bolt, which is threadedly connected to the cutter body 1. The abutment block 82 is fixed on the driving bolt. The driving bolt rotates to drive the abutment block 82 to slide along the length direction of the cutter body 1. The abutment block 82 slides and abuts the wedge surface 81, and the clamping bar 7 is driven to extend out of the length of the cutter body 1 through the wedge surface 81. The clamping block is driven to slide through the abutment mechanism 8, so that the clamping bar 7 is set to facilitate the clamping of the tool by milling cutter clamps of different sizes by sliding. An anti-slip block 9 is fixed on the clamping bar 7, and an anti-slip groove 10 is opened on the cutter body 1. The anti-slip block 9 is slidably set in the anti-slip groove 10. The setting of the anti-slip block 9 can reduce the probability of the clamping bar 7 sliding off from the cutter body 1.

[0036] The implementation principle of the embodiment of this application is as follows: Install the cutting blade body 2 on the tool body 1. According to the clamping dimensions of the milling cutter fixture on the milling machine, adjust the length of the clamping strip 7 extending from the tool body 1. Then, clamp the tool body 1 through the milling cutter fixture on the clamping strip 7. Drive the cutting blade body 2 to rotate by rotating the tool body 1, so that the cutting edge 3 on the cutting blade body 2 approaches the workpiece and then mills the workpiece to complete the milling process of the workpiece. When the cutting edge 3 is worn, remove the milling cutter and grind the cutting edge 3 of the cutting blade body 2. After the cutting edge 3 is polished, loosen the mounting bolt 4 to drive the sliding cutting blade body 2 to adjust the cutting edge 3 to the position before wear, and then tighten the mounting bolt 4 to fix the cutting blade body 2. Install the polished and adjusted milling cutter back on the milling machine to continue the milling process; when the cutting blade body 2 cannot adjust the cutting edge 3 to the position before wear after being polished multiple times, remove the mounting bolt 4 and replace it with a new cutting blade body 2. After installing and fixing the new cutting blade body 2 on the tool body 1 through the mounting bolt 4, install the tool body 1 on the milling machine for milling process.

[0037] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A round nose milling cutter, comprising a columnar cutter body (1) and a cutting edge body (2) installed at one end of the cutter body (1) in the length direction. The cutting edge body (2) is installed on the cutter body (1) on one side in the width direction, and a cutting edge (3) is formed at one end of the cutting edge body (2) away from the cutter body (1). It is characterized in that: An installation bolt (4) is arranged between the blade body (2) and the tool body (1), and the blade body (2) is detachably installed on the tool body (1) through the installation bolt (4).

2. The round nose milling cutter according to claim 1, wherein: An adjustment groove (5) is formed in the blade body (2), the installation bolt (4) is slidably arranged in the adjustment groove (5), and the installation bolt (4) passes through the adjustment groove (5) and is threadedly connected to the tool body (1).

3. The round nose milling cutter according to claim 2, wherein: The installation bolt (4) is countersunk on the blade body (2).

4. A round nose milling cutter according to claim 3, characterized in that: A discharge groove (6) is formed in the tool body (1) at one end corresponding to the installation position of the blade body (2).

5. A round nose milling cutter according to claim 1, wherein: A plurality of clamping strips (7) are evenly inserted in the circumferential direction at one end of the tool body (1) away from the installation of the blade body (2).

6. A round nose milling cutter according to claim 5, characterized in that: The clamping strip (7) is slidably arranged on the tool body (1), the clamping strip (7) slides in a direction close to or away from the center of the tool body (1), the clamping strip (7) extends out of the side wall of the tool body (1) through sliding, and a contact mechanism (8) is arranged at the center of one end of the tool body (1) away from the blade body (2), and the contact mechanism (8) abuts against the side of the clamping strip (7) facing the center of the tool body (1).

7. The round nose milling cutter according to claim 6, characterized in that: The contact mechanism (8) includes a wedge surface (81), a contact block (82) and a driving member (83). The wedge surface (81) is formed at one end of the clamping strip (7) facing the center of the tool body (1), the contact block (82) abuts against the wedge surfaces (81) of all the clamping strips (7), and the driving member (83) drives the contact block (82) to slide, and the length of the clamping strip (7) extending out of the tool body (1) is driven by the sliding of the contact block (82).

8. The round nose milling cutter according to claim 7, characterized in that: An anti - detachment block (9) is fixedly arranged on the clamping strip (7), an anti - detachment sliding groove (10) is formed in the tool body (1), and the anti - detachment block (9) is slidably arranged in the anti - detachment sliding groove (10).

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