Angle-adjustable numerical control fine boring cutter

Abstract

The utility model provides an angle-adjustable numerical control fine boring cutter, and belongs to the technical field of numerical control cutters. The fine boring cutter solves the problems that an existing fine boring cutter cannot conduct angle adjustment according to the shape of a machined workpiece, and limitation exists in practical application. The angle-adjustable numerical control fine boring cutter comprises a cutter bar, a fine adjusting knob and a boring cutter mounting seat, a rotary knob groove and a boring cutter groove are formed in the two opposite sides of the bottom end of the cutter bar respectively, a fine adjustment rotary knob is installed at the rotary knob groove in a matched mode, and a boring cutter installation base is installed at the boring cutter groove in a matched mode. High-precision knob scales are arranged on the outer edge of the fine adjusting knob, an adjusting shaft is fixedly connected to the center of the fine adjusting knob, the adjusting shaft penetrates through the bottom of the cutter bar and is fixedly connected with a boring cutter mounting seat, the boring cutter mounting seat comprises a mounting head and a blade frame, and a boring cutter blade for boring is mounted on the blade frame in a matched manner. The boring angle adjusting device has the advantages that the boring angle can be accurately adjusted according to the shape of a machined workpiece, and the boring angle adjusting device is more practical.

Description

Technical Field

[0001] This utility model belongs to the field of CNC cutting tool technology, and specifically relates to an angle-adjustable CNC precision boring tool. Background Technology

[0002] A boring tool is a cutting tool with one or two cutting sections, specifically designed for roughing, semi-finishing, or finishing existing holes. Boring tools can be used on CNC machine tools such as lathes, boring machines, or milling machines. Boring tools can be divided into roughing tools and finishing tools. When machining a boring hole, roughing is usually performed first, followed by finishing, with finishing requiring a higher precision from the boring tool.

[0003] According to patent application number CN202321480029.5, a precision machining CNC tool includes a tool shaft, a boring tool, and a tool changing assembly. The tool shaft has a tool holder at its top and a positioning groove at its bottom. The tool changing assembly includes a push rod slidably mounted inside the tool shaft. A movable groove is formed on the surface of the push rod, and a spring is fixedly mounted inside the movable groove. A fixing screw, which is fixedly connected to the surface of the push rod, is rotatably sleeved on the inner side of the boring tool. The outer side of the boring tool abuts against the inner side of the positioning groove. A limiting screw is provided on one side of the tool shaft. In this patent, the boring tool is fixedly mounted in the positioning groove, making angle adjustment impossible according to the shape of the workpiece, which has limitations in practical applications. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing an angle-adjustable CNC precision boring tool.

[0005] The objective of this utility model can be achieved through the following technical solution: an angle-adjustable CNC precision boring tool, comprising a tool holder, a precision adjustment knob, and a boring tool mounting base; the tool holder has a connector formed at its top end, and a knob groove and a boring tool groove are respectively opened on opposite sides at its bottom end; a precision adjustment knob is installed in the knob groove, and a boring tool mounting base and a boring tool insert are installed in the boring tool groove;

[0006] The fine adjustment knob is a convex conical structure with high-precision knob scales on its outer circular edge. An adjustment shaft is fixed to the center of the fine adjustment knob, passing through the bottom of the tool holder and protruding from the boring tool groove. The boring tool mounting base is integrally formed, including an upper mounting head and a lower insert holder. The mounting head is sleeved on the adjustment shaft protruding from the boring tool groove and linked with it. The insert holder has an insert groove at the bottom, and an insert mounting shaft protrudes from the insert groove. The boring tool insert is sleeved on the insert mounting shaft and corresponds to the boring tool insert. The insert holder and the boring tool insert protrude from the bottom end face of the tool holder.

[0007] In the aforementioned angle-adjustable CNC precision boring tool, a retaining ring is fitted on the tool holder below the connector, and a plurality of first positioning grooves are evenly distributed circumferentially on the outer side wall of the retaining ring.

[0008] In the aforementioned angle-adjustable CNC precision boring tool, several second positioning slots are also uniformly circumferentially formed on the outer wall of the tool shank below the fixing ring.

[0009] In the aforementioned angle-adjustable CNC precision boring tool, both ends of the adjusting shaft are provided with hexagonal adjusting holes at the center. A hexagonal wrench is inserted into the hexagonal adjusting holes to synchronously adjust the precision adjusting knob and the boring tool mounting base.

[0010] In the aforementioned angle-adjustable CNC precision boring tool, the bottom of the tool holder has a bolt hole in a direction perpendicular to the adjustment shaft, and a locking bolt is fitted into the bolt hole.

[0011] Compared with the prior art, the precision adjustment knob and the boring tool mounting base in the angle-adjustable CNC precision boring tool provided by this utility model are linked together by the adjustment shaft, which realizes that the boring tool insert can be precisely adjusted according to the shape of the workpiece being processed, making it more practical. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an angle-adjustable CNC precision boring tool;

[0013] Figure 2 This is a schematic diagram of the precision adjustment knob in this angle-adjustable CNC precision boring tool;

[0014] Figure 3 This is a schematic diagram of the boring tool mounting base in this angle-adjustable CNC precision boring tool;

[0015] In the above figure, 100 is the tool holder; 110 is the connector; 120 is the retaining ring; 121 is the first positioning slot; 122 is the second positioning slot; 130 is the knob slot; 140 is the boring tool slot; 150 is the bolt hole; 151 is the locking bolt; 200 is the fine adjustment knob; 210 is the knob scale; 220 is the adjustment shaft; 221 is the hexagonal adjustment hole; 300 is the boring tool mounting base; 310 is the mounting head; 320 is the tool holder; 321 is the tool mounting shaft; and 330 is the boring tool insert. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figures 1 to 3As shown, this angle-adjustable CNC precision boring tool includes a tool holder 100, a precision adjustment knob 200, and a boring tool mounting base 300. The tool holder 100 has a connector 110 at its top end and a knob groove 130 and a boring tool groove 140 on opposite sides of its bottom end. The precision adjustment knob 200 is installed in the knob groove 130, and the boring tool mounting base 300 and boring tool insert 330 are installed in the boring tool groove 140.

[0018] A retaining ring 120 is fitted onto the tool holder 100 below the connector 110. The outer wall of the retaining ring 120 has several first positioning grooves 121 evenly spaced circumferentially. Similarly, several second positioning grooves 122 are evenly spaced circumferentially spaced on the outer wall of the tool holder 100 below the retaining ring 120. The connector 110 is used to insert the tool holder 100 into the mounting head 310 of the CNC machine tool. The retaining ring 120 and the positioning grooves are used to limit and fix the precision boring tool.

[0019] like Figure 2 As shown, the fine adjustment knob 200 has a convex conical structure, with a high-precision knob scale 210 on its circular outer edge, facilitating precise adjustment of the rotation angle. An adjustment shaft 220 is fixedly connected to the center of the fine adjustment knob 200, passing through the bottom of the tool holder 100 to the side protruding from the boring groove 140.

[0020] like Figure 3 As shown, the boring bar mounting base 300 is integrally formed, including an upper mounting head 310 and a lower insert holder 320. The mounting head 310 is sleeved on the adjusting shaft 220 protruding from the boring bar groove 140 and linked with it. Both ends of the adjusting shaft 220 have hexagonal adjusting holes 221 at their centers. A hexagonal wrench is inserted into the hexagonal adjusting holes 221 to synchronously adjust the angle of the fine adjustment knob 200 and the boring bar mounting base 300. The insert holder 320 has an insert groove at its bottom, and the insert mounting shaft 321 protrudes from the insert groove. The boring bar insert 330 is sleeved on the insert mounting shaft 321 and correspondingly engages with it. The insert holder 320 and the boring bar insert 330 protrude from the bottom end face of the tool holder 100.

[0021] To further explain, the bottom of the tool holder 100 has a bolt hole 150 perpendicular to the adjusting shaft 220. A locking bolt 151 is fitted into the bolt hole 150, which can lock and fix the boring tool mounting seat 300 and the boring tool insert 330, after the boring angle has been adjusted, in a relatively locked manner. A groove surface that abuts the tail of the locking bolt 151 can be formed on the shaft of the adjusting shaft 220 in a circumferential direction, which facilitates the relative locking of the locking bolt 151 and the adjusting shaft 220.

[0022] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0023] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. An angle-adjustable CNC precision boring tool, comprising a tool holder (100), a precision adjustment knob (200), and a boring tool mounting base (300); characterized in that, The tool holder (100) has a connector (110) at the top and a knob groove (130) and a boring tool groove (140) on opposite sides at the bottom. A fine adjustment knob (200) is installed in the knob groove (130) and a boring tool mounting base (300) and a boring tool insert (330) are installed in the boring tool groove (140). The fine adjustment knob (200) has a convex conical structure, with high-precision knob scales (210) on its outer circular edge. An adjustment shaft (220) is fixedly connected to the center of the fine adjustment knob (200), extending through the bottom of the tool holder (100) to the side protruding from the boring tool groove (140). The boring tool mounting base (300) is integrally formed, including an upper mounting head (310) and a lower tool holder (320). The mounting head (310) is sleeved on the adjusting shaft (220) protruding from the boring tool groove (140) and linked with it. The blade holder (320) has a blade groove at the bottom, and a blade mounting shaft (321) protrudes from the blade groove. The boring tool blade (330) is sleeved on the blade mounting shaft (321) and correspondingly cooperates with the boring tool blade (330). The blade holder (320) and the boring tool blade (330) protrude from the bottom end face of the tool holder (100).

2. The angle-adjustable CNC precision boring tool according to claim 1, characterized in that, A retaining ring (120) is fitted on the tool holder (100) below the connector (110), and a plurality of first positioning grooves (121) are evenly opened on the outer side wall of the retaining ring (120) in the circumferential direction.

3. The angle-adjustable CNC precision boring tool according to claim 2, characterized in that, Below the retaining ring (120), several second positioning slots (122) are also evenly provided circumferentially on the outer wall of the tool shank (100).

4. The angle-adjustable CNC precision boring tool according to claim 1, characterized in that, The two ends of the adjustment shaft (220) are provided with hexagonal adjustment holes (221) at the center. By inserting a hexagonal wrench into the hexagonal adjustment holes (221), the fine adjustment knob (200) and the boring tool mounting seat (300) can be adjusted synchronously.

5. The angle-adjustable CNC precision boring tool according to claim 1, characterized in that, The bottom of the tool holder (100) has a bolt hole (150) in a direction perpendicular to the adjusting shaft (220), and a locking bolt (151) is installed in the bolt hole (150).

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