Mechanical cutter capable of adjusting cutting edge angle and adjusting method

Abstract

The invention discloses a mechanical cutter capable of adjusting the cutting edge angle and an adjusting method.The mechanical cutter comprises a lathe spindle and a connecting section, the connecting section is installed in the lathe spindle in a threaded mode, a turning tool is arranged on the side, away from the lathe spindle, of the connecting section and comprises a cutter handle and a cutter bar, and the cutter handle is fixedly connected with the connecting section; the cutter bar comprises a fixed cutter bar body and a movable cutter bar body, a groove matched with the movable cutter bar body is formed in the cutter handle, the movable cutter bar body is fixedly connected with the cutter handle through a second bolt, and one end of the movable cutter bar body and one end of the fixed cutter bar body are each provided with a circular truncated cone part. According to the invention, the circular truncated cone part is provided with the check blocks and the outer wall scale marks which are arranged in an annular array, and the rotation adjusting part is correspondingly provided with the embedding groove and the pointer. When a user adjusts the angle of the cutting edge, the angle value can be visually read through alignment of the pointer and the scale marks, gear type positioning is achieved by means of mechanical meshing of the check block and the embedding groove, and it is ensured that the cutting edge can accurately fall into the preset angle position during adjustment every time.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical cutting tools, and in particular to a mechanical cutting tool with adjustable blade angle and an adjustment method. Background Art

[0002] As a core component in machining, the performance of mechanical cutting tools plays a decisive role in the machining accuracy and efficiency of workpieces. To meet the needs of machining complex contours such as bevels and cones, mechanical cutting tools with adjustable blade angles have been developed. However, existing technologies still have many limitations in their structure and performance.

[0003] In terms of the accuracy and convenience of angle adjustment, traditional tools mostly rely on simple friction locking and lack precise positioning references. External tools such as protractors are required for adjustment, which is a cumbersome process and prone to errors. To improve this problem, a lathe tool with adjustable angles, such as that disclosed in Chinese patent CN207840179U, achieves mechanical adjustment of the tool angle through a gear set and a dial ruler. Its structure includes a central axis gear, upper and lower top gears, and a rear support auxiliary wheel. The angle is adjusted by a hinge belt linkage conversion gear, and the angle value is observed through a dial ruler. Although it is more reliable than pure friction locking, the installation position of this type of blade is usually unique, and it does not have the function of multi-position installation on the same tool holder to fine-tune the cutting posture, which limits the processing flexibility of the tool.

[0004] In terms of processing efficiency, for large cutting depth processing, the traditional method usually uses multiple passes or replacement of roughing and finishing tools to complete it, which is inefficient.

[0005] Therefore, developing a mechanical tool with adjustable blade angle that has stable structure, precise adjustment, efficient processing and flexible use is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] In view of the above-mentioned problems existing in the existing mechanical cutting tools with adjustable blade angles, the present invention is proposed.

[0007] Therefore, the purpose of the present invention is to provide a mechanical tool with adjustable blade angle and an adjustment method, which aims to solve the problems of low adjustment accuracy, poor stability and insufficient processing efficiency of traditional tools.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mechanical tool with adjustable blade angle, comprising a lathe spindle and a connecting section, the connecting section being threadedly installed in the lathe spindle, a turning tool being provided on the side of the connecting section away from the lathe spindle, the turning tool comprising a tool handle and a tool rod, the tool handle being fixedly connected to the connecting section, the tool rod comprising a fixed tool rod and a movable tool rod, a groove being provided in the tool handle that is adapted to the movable tool rod, the movable tool rod being fixedly connected to the tool handle by a second bolt, a frustum being provided at one end of the movable tool rod and the fixed tool rod, and the frustum being integrally connected to the tool rod, a rotation adjustment portion being provided at the upper end of the frustum being fixedly connected to the frustum being fixed by a large bolt, and a detachable blade being provided inside the rotation adjustment portion.

[0009] As a preferred solution of the mechanical tool with adjustable blade angle described in the present invention, it also includes a clamping block, which is Z-shaped, one end of the clamping block abuts against the rotation adjustment part, and the other end of the clamping block is fixedly connected to the tool rod through a third bolt.

[0010] As a preferred solution of the mechanical tool with adjustable blade angle described in the present invention, a mounting portion is provided on the side of the rotation adjustment portion away from the tool rod, and a mounting groove is provided on the side of the rotation adjustment portion close to the mounting portion.

[0011] As a preferred solution of the mechanical tool with adjustable blade angle described in the present invention, a countersunk hole is provided on the rotation adjustment part, and the rotation adjustment part is fixedly connected to the blade by a small bolt passing through the countersunk hole. A positioning hole is provided on one side of the countersunk hole, and the rotation adjustment part is positioned with the blade by a positioning pin passing through the positioning hole.

[0012] As a preferred solution of the mechanical tool with adjustable blade angle described in the present invention, the positioning hole includes a first positioning hole and a second positioning hole adapted to the positioning pin, the first positioning hole and the second positioning hole are both hexagonal, and the side edges of the first positioning hole and the side edges of the second positioning hole are staggered with each other.

[0013] As a preferred solution of the mechanical tool with adjustable blade angle described in the present invention, there are a number of blocks in a circular array on the upper end of the frustum, and scale lines are provided on the outer wall of the frustum.

[0014] As a preferred solution of the mechanical tool with adjustable blade angle described in the present invention, the lower end of the rotation adjustment part is provided with an engaging groove adapted to the stop block, and the outer wall of the rotation adjustment part is provided with a pointer for indicating the value corresponding to the scale line.

[0015] As a preferred solution of the mechanical tool with adjustable blade angle described in the present invention, wherein: a second semi-hexagonal groove is provided on the outer side of the connecting section, and a first semi-hexagonal groove is correspondingly provided on the inner side of the lathe spindle, and the two together constitute a complete hexagonal hole, and circumferential limitation is achieved by inserting a hexagonal limit pin, a through hole is provided inside the limit pin, and the limit pin is axially fixed to the lathe spindle by a first bolt.

[0016] As a preferred solution of the mechanical tool with adjustable blade angle described in the present invention, the connecting section is further provided with a first stud and a second stud, the diameter of the second stud is smaller than the diameter of the first stud, and a screw hole compatible with the first stud and the second stud is provided in the lathe spindle.

[0017] The present invention provides another technical solution: a method for adjusting a mechanical tool with an adjustable blade angle, comprising the following steps:

[0018] Step 1: Make sure the lathe spindle and connecting section are correctly installed and the entire machine tool is in a stationary state. Then use a suitable tool to loosen the second bolt so that the position of the movable tool bar can be adjusted.

[0019] Step 2: Use a wrench or special tool to loosen the large bolt so that the rotary adjustment part can rotate freely; manually rotate the rotary adjustment part according to the required angle until the pointer points to the required angle indicated by the scale line on the frustum; ensure that the fitting groove at the lower end of the rotary adjustment part is aligned with the stopper on the frustum to ensure the stability and accuracy of the rotary adjustment part;

[0020] Step 3: After the rotation adjustment part is adjusted to the desired angle, retighten the large bolt to ensure that the rotation adjustment part is firmly fixed on the frustum part; check whether the clamping block is in good contact with the rotation adjustment part, and adjust the third bolt if necessary to ensure the stability of the clamping block;

[0021] Step 4: If you need to replace the blade, first loosen the small bolt and carefully remove the old blade from the mounting slot inside the rotary adjustment part;

[0022] Step 5. Place the new blade into the mounting slot inside the rotary adjustment unit, ensuring that the blade is aligned with the first and second positioning holes. Use the positioning pins through the positioning holes to ensure the correct position of the blade. Finally, use the small bolts through the countersunk holes to secure the blade to the rotary adjustment unit.

[0023] Step 6. Confirm that all bolts are tightened; check whether the rotation adjustment part and the frustum part are tightly fitted, and whether the clamping block is stable; start the lathe at low speed, observe the working status of the tool, ensure that the blade angle is accurate, and the tool runs smoothly without abnormal vibration.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. By providing a circular array of stops and outer wall scale lines on the truncated cone, and corresponding fitting grooves and pointers on the rotary adjustment section, users can intuitively read the angle value by aligning the pointer with the scale lines when adjusting the blade angle. The mechanical engagement of the stops and fitting grooves enables gear-type positioning, ensuring that each adjustment accurately falls into the preset angle position.

[0026] 2. This tool is provided with a first positioning hole and a second positioning hole inside the rotation adjustment part. Both are hexagonal and the side edges are staggered with each other. When used with a single positioning pin, the blade can obtain multiple different installation angles without replacing parts.

[0027] 3. By staggering the two turning tools front and back so that the rear turning tool protrudes from the front turning tool, two-level cutting depth processing can be completed in one cutting process, which is equivalent to integrating roughing and semi-finishing on the same tool, greatly reducing the number of cutting passes and processing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0029] Figure 1 The overall structure of a mechanical tool with adjustable blade angle and its adjustment method of the present invention is shown in FIG. Figure 1 ;

[0030] Figure 2 The structure of a mechanical tool with adjustable blade angle and its adjustment method of the present invention is shown as follows Figure 2 ;

[0031] Figure 3 The structure of a mechanical tool with adjustable blade angle and its adjustment method of the present invention is shown as follows Figure 3 ;

[0032] Figure 4 The structure of a mechanical tool with adjustable blade angle and its adjustment method of the present invention is shown as follows Figure 4 ;

[0033] Figure 5 The structure of a mechanical tool with adjustable blade angle and its adjustment method of the present invention is shown as follows Figure 5 ;

[0034] Figure 6 The structure of a mechanical tool with adjustable blade angle and its adjustment method of the present invention is shown as follows Figure 6 ;

[0035] Figure 7 The structure of a mechanical tool with adjustable blade angle and its adjustment method of the present invention is shown as follows Figure 7 .

[0036] In the figure: 1. lathe spindle; 2. connecting section; 3. limit pin; 4. first bolt; 5. tool handle; 6. fixed tool rod; 7. movable tool rod; 8. second bolt; 9. rotation adjustment part; 10. clamping block; 11. third bolt; 101. first half hexagonal slot; 201. first stud; 202. second stud; 203. second half hexagonal slot; 601. frustum; 602. scale line; 603. stopper; 901. large bolt; 902. small bolt; 903. positioning pin; 904. pointer; 905. blade; 906. mounting groove; 907. mounting part; 908. countersunk hole; 909. first positioning hole; 9010. second positioning hole; 9011. fitting groove. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0040] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0041] See also Figure 1-Figure 7This embodiment provides a mechanical tool with adjustable blade angle, comprising a lathe spindle 1 and a connecting section 2. The connecting section 2 is threadedly mounted within the lathe spindle 1. A turning tool is provided on the side of the connecting section 2 away from the lathe spindle 1. The turning tool comprises a shank 5 and a tool bar. The shank 5 is fixedly connected to the connecting section 2. A second semi-hexagonal groove 203 is provided on the outer side of the connecting section 2, and a first semi-hexagonal groove 101 is correspondingly provided on the inner side of the lathe spindle 1. Together, the two form a complete hexagonal hole. Circumferential limiting is achieved by inserting a hexagonal limit pin 3. The limit pin 3 has a through hole inside. The limit pin 3 is axially fixed to the lathe spindle 1 by a first bolt 4. The connecting section 2 is also provided with a first stud 201 and a second stud 202. The diameter of the second stud 202 is smaller than that of the first stud 201. The lathe spindle 1 is provided with screw holes that match the first stud 201 and the second stud 202.

[0042] By providing a second semi-hexagonal groove 203 on the outside of the connecting section 2 and a corresponding first semi-hexagonal groove 101 on the inside of the lathe spindle 1, the two are assembled to form a complete hexagonal mating hole. After inserting the hexagonal limit pin 3, the relative rotation between the connecting section 2 and the spindle can be effectively limited. This structure significantly improves the tool's torsion resistance during high-speed cutting, avoiding tool angle deviation caused by loosening of the threaded connection under alternating loads, thereby ensuring processing accuracy and safety. The hexagonal limit pin 3 is internally provided with a through hole, and the limit pin 3 is locked to the lathe spindle 1 by a first bolt 4 to achieve axial fixation of the pin and prevent it from falling off under vibrating conditions. This design not only achieves circumferential limitation, but also completes axial positioning, improving the stability and safety of the overall connection. The connecting section 2 is initially installed in the lathe spindle 1 through a threaded connection and is provided with a first stud 201 and a second stud 202, which have different diameters and respectively mate with the screw holes in the spindle. This multi-stage stud connection increases the contact area and connection rigidity between connecting section 2 and the spindle, improving assembly alignment and coaxiality. It effectively disperses cutting forces, reduces localized stress concentration, and extends tool life. The hexagonal latch structure is removable, and combined with the bolted fastening, it allows the circumferential limiter to be quickly released when the tool requires replacement or maintenance, allowing connecting section 2 to be separated from the spindle, enhancing the equipment's maintainability and operational flexibility.

[0043] The knife rod includes a fixed knife rod 6 and a movable knife rod 7. A groove adapted to the movable knife rod 7 is opened in the knife handle 5. The movable knife rod 7 is fixedly connected to the knife handle 5 by a second bolt 8. One end of the movable knife rod 7 and the fixed knife rod 6 is provided with a frustum 601, and the frustum 601 is integrally connected to the knife rod. The upper end of the frustum 601 is provided with a rotation adjustment part 9, and the rotation adjustment part 9 is fixedly connected to the frustum 601 by a large bolt 901. A detachable blade 905 is provided inside the rotation adjustment part 9.

[0044] The movable tool bar 7 can be installed in the groove of the tool holder 5. Combined with the connection structure between the rotary adjustment section 9 and the truncated cone 601, the movable tool bar 7 and its blade 905 can be adjusted relative to the fixed tool bar 6. By arranging two turning tools, staggered front and back, with the tool at the rear end protruding from the tool at the front end, a single turning operation can achieve the cutting depth of both tools, reducing the total number of turning operations and improving work efficiency. A removable blade 905 is housed within the rotary adjustment section 9 and is quickly clamped using a small bolt 902 and a locating pin 903. The blade 905 is independent of the rotary adjustment section 9 and is a standard machine-clamped blade. Even after adjusting the tool bar angle, the blade 905 can be replaced independently. A worn blade 905 can be replaced without replacing the entire tool bar, reducing operating costs and improving production efficiency. The large bolt 901 applies sufficient preload to the rotary adjustment section 9 to prevent it from loosening during high-speed rotation. The locating pin 903 prevents the blade 905 from rotating circumferentially, preventing it from shifting due to cutting forces.

[0045] It also includes a clamping block 10 , which is Z-shaped. One end of the clamping block 10 abuts against the rotation adjustment portion 9 , and the other end of the clamping block 10 is fixedly connected to the knife rod through a third bolt 11 .

[0046] The rotary adjustment unit 9 is connected to the truncated cone 601 by a large bolt 901, primarily bearing the axial compressive force. However, under high-speed rotation or impact loads, the large bolt 901 may vibrate and weaken the preload, causing the adjustment unit to loosen. A Z-shaped clamping block 10, with one end resting against the rotary adjustment unit 9 and the other end secured to the arbor by a third bolt 11, forms an external mechanical clamping structure, applying additional lateral restraint to the rotary adjustment unit 9.

[0047] A mounting portion 907 is provided on the side of the rotary adjustment portion 9 away from the blade, and a mounting slot 906 is provided on the inner side of the rotary adjustment portion 9 near the mounting portion 907. A countersunk hole 908 is provided on the rotary adjustment portion 9, through which a small bolt 902 passes to securely connect the rotary adjustment portion 9 to the blade 905. A positioning hole is provided on one side of the countersunk hole 908, through which a positioning pin 903 passes to position the rotary adjustment portion 9 relative to the blade 905. The positioning holes include a first positioning hole 909 and a second positioning hole 9010 that mate with the positioning pin 903. Both the first positioning hole 909 and the second positioning hole 9010 are hexagonal, and the side edges of the first positioning hole 909 and the side edges of the second positioning hole 9010 are offset from each other.

[0048] The mounting portion 907 and the mounting groove 906 are adapted to the outer shape of the blade 905, providing preliminary axial and radial positioning. During the cutting process, the blade 905 is subjected to a large alternating load. The hexagonal positioning pin 903 and the positioning hole can effectively prevent the blade 905 from micro-wearing or rotational loosening in the mounting groove 906. A countersunk hole 908 is provided on the rotation adjustment portion 9, and a small bolt 902 passes through the hole to press the blade 905 tightly.

[0049] There are a number of blocks 603 in a circular array at the upper end of the frustum 601, and scale lines 602 are provided on the outer wall of the frustum 601. A fitting groove 9011 is provided at the lower end of the rotary adjustment portion 9 to match the block 603, and a pointer 904 is provided on the outer wall of the rotary adjustment portion 9 to indicate the value corresponding to the scale line 602. The operator can intuitively read the current installation angle of the blade 905, and can achieve angle setting accurate to the degree level without the need for additional measuring tools, greatly improving the adjustment efficiency and accuracy. Each block 603 corresponds to a preset angle position, realizing gear-type angle adjustment, preventing angle drift or fine-tuning out of control during the adjustment process, and ensuring that each adjustment can accurately fall into the target angle position.

[0050] The adjustable blade angle mechanical tool of this embodiment is installed on the spindle of a five-axis CNC milling machine. According to the bevel angle of the workpiece, such as a 30° bevel, the operator loosens the large bolt 901, rotates the rotary adjustment part 9, and accurately adjusts the rake angle of the blade 905 to +5° by matching the pointer 904 with the scale line 602 to reduce the cutting force and improve chip removal. Tighten the large bolt 901 and the third bolt 11, and the clamping block 10 presses the rotary adjustment part 9 to ensure the angle is locked. Start the processing, the lathe spindle rotates at high speed, the connecting section 2 cooperates with the spindle thread through the stud, and is fixed circumferentially and axially by the hexagonal limit pin 3 and the first bolt 4 to ensure that there is no loosening under high torque. The tool cuts stably, obtains good surface roughness (Ra ≤ 1.6μm), and the tool life is increased by about 40%.

[0051] In order to better demonstrate the process of realizing a mechanical tool with adjustable blade angle, this embodiment proposes an adjustment method for a mechanical tool with adjustable blade angle, including the following steps:

[0052] Step 1: Ensure that the lathe spindle 1 and the connecting section 2 are correctly installed and the entire machine tool is in a stationary state. Then use a suitable tool to loosen the second bolt 8 so that the position of the movable tool bar 7 can be adjusted.

[0053] Step 2: Use a wrench or special tool to loosen the large bolt 901 so that the rotation adjustment part 9 can rotate freely; manually rotate the rotation adjustment part 9 according to the required angle until the pointer 904 points to the required angle indicated by the scale line 602 on the frustum part 601; ensure that the fitting groove 9011 at the lower end of the rotation adjustment part 9 is aligned with the stopper 603 on the frustum part 601 to ensure the stability and accuracy of the rotation adjustment part 9;

[0054] Step 3: After the rotation adjustment part 9 is adjusted to the desired angle, re-tighten the large bolt 901 to ensure that the rotation adjustment part 9 is firmly fixed on the truncated cone part 601; check whether the clamping block 10 is in good contact with the rotation adjustment part 9, and adjust the third bolt 11 if necessary to ensure the stability of the clamping block 10;

[0055] Step 4: If the blade 905 needs to be replaced, first loosen the small bolt 902 and carefully remove the old blade 905 from the mounting slot 906 inside the rotation adjustment part 9;

[0056] Step 5: Place the new blade 905 into the mounting slot 906 inside the rotation adjustment part 9, ensuring that the blade 905 is aligned with the first positioning hole 909 and the second positioning hole 9010; use the positioning pin 903 to pass through the positioning hole to ensure the correct position of the blade 905; finally, use the small bolt 902 to pass through the countersunk hole 908 to fix the blade 905 on the rotation adjustment part 9;

[0057] Step 6. Confirm that all bolts are tightened; check whether the rotation adjustment part 9 and the frustum part 601 are tightly fitted, and whether the clamping block 10 is stable; start the lathe at low speed, observe the working status of the tool, ensure that the blade angle is accurate, and the tool runs smoothly without abnormal vibration.

[0058] It is important to note that the construction and arrangement of the present application, as illustrated in various exemplary embodiments, are illustrative only. Although only a few embodiments are described in detail in this disclosure, those reading this disclosure will readily appreciate that numerous modifications are possible (e.g., variations in the size, dimensions, structure, shape, and proportions of various components, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, components shown as integrally formed may be constructed from multiple parts or components, the positions of components may be inverted or otherwise altered, and the nature, number, or position of discrete components may be modified or changed. All such modifications are therefore intended to be encompassed within the scope of this invention. The order or sequence of any process or method steps may be altered or resequenced according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover structures described herein that perform the recited function, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of this invention. Therefore, the present invention is not limited to the specific embodiments, but extends to a variety of modifications that still fall within the scope of the appended claims. Furthermore, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiment may be described (i.e., those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A mechanical tool with adjustable blade angle, characterized in that: The invention comprises a lathe spindle (1) and a connecting section (2), wherein the connecting section (2) is threadedly installed in the lathe spindle (1), and a turning tool is provided on a side of the connecting section (2) away from the lathe spindle (1), the turning tool comprising a tool handle (5) and a tool rod, the tool handle (5) is fixedly connected to the connecting section (2), the tool rod comprises a fixed tool rod (6) and a movable tool rod (7), a groove adapted to the movable tool rod (7) is provided in the tool handle (5), the movable tool rod (7) is fixedly connected to the tool handle (5) by a second bolt (8), one end of each of the movable tool rod (7) and the fixed tool rod (6) is provided with a truncated cone (601), and the truncated cone (601) is integrally connected to the tool rod, the upper end of the truncated cone (601) is provided with a rotation adjustment portion (9), the rotation adjustment portion (9) is fixedly connected to the truncated cone (601) by a large bolt (901), and a detachable blade (905) is provided inside the rotation adjustment portion (9).

2. The mechanical tool with adjustable blade angle according to claim 1, characterized in that: It also includes a clamping block (10), which is Z-shaped. One end of the clamping block (10) abuts against the rotation adjustment portion (9), and the other end of the clamping block (10) is fixedly connected to the knife rod via a third bolt (11).

3. The mechanical tool with adjustable blade angle according to claim 2, characterized in that: A mounting portion (907) is provided on a side of the rotation adjustment portion (9) away from the knife rod, and a mounting groove (906) is provided on a side of the rotation adjustment portion (9) close to the mounting portion (907).

4. The mechanical tool with adjustable blade angle according to claim 3, characterized in that: A countersunk hole (908) is provided on the rotation adjustment portion (9), and the rotation adjustment portion (9) is fixedly connected to the blade (905) by a small bolt (902) passing through the countersunk hole (908). A positioning hole is provided on one side of the countersunk hole (908), and the rotation adjustment portion (9) is positioned with the blade (905) by a positioning pin (903) passing through the positioning hole.

5. The mechanical tool with adjustable blade angle according to claim 4, characterized in that: The positioning holes include a first positioning hole (909) and a second positioning hole (9010) adapted to the positioning pin (903); the first positioning hole (909) and the second positioning hole (9010) are both hexagonal, and the side edges of the first positioning hole (909) and the side edges of the second positioning hole (9010) are offset from each other.

6. The mechanical tool with adjustable blade angle according to claim 5, characterized in that: The upper end of the truncated cone portion (601) is provided with a plurality of stoppers (603) in a circular array, and the outer wall of the truncated cone portion (601) is provided with scale lines (602).

7. The mechanical tool with adjustable blade angle according to claim 6, characterized in that: The lower end of the rotation adjustment portion (9) is provided with an engaging groove (9011) adapted to the stopper (603), and the outer wall of the rotation adjustment portion (9) is provided with a pointer (904) for indicating the value corresponding to the scale line (602).

8. The mechanical tool with adjustable blade angle according to claim 7, characterized in that: The connecting section (2) is provided with a second semi-hexagonal groove (203) on the outside, and the lathe spindle (1) is correspondingly provided with a first semi-hexagonal groove (101) on the inside. The two together form a complete hexagonal hole, and circumferential limitation is achieved by inserting a hexagonal limiting pin (3). A through hole is provided inside the limiting pin (3), and the limiting pin (3) is axially fixed to the lathe spindle (1) by a first bolt (4).

9. The mechanical tool with adjustable blade angle according to claim 8, characterized in that: The connecting section (2) is further provided with a first stud (201) and a second stud (202), the diameter of the second stud (202) being smaller than the diameter of the first stud (201), and a screw hole adapted to the first stud (201) and the second stud (202) is provided in the lathe spindle (1).

10. The method for adjusting a mechanical tool with an adjustable blade angle according to claim 9, characterized in that: The steps include: Step 1: Ensure that the lathe spindle (1) and the connecting section (2) are correctly installed and the entire machine tool is in a stationary state, and then use a suitable tool to loosen the second bolt (8) so that the position of the movable tool bar (7) can be adjusted; Step 2: Use a wrench or a special tool to loosen the large bolt (901) so that the rotation adjustment part (9) can rotate freely; manually rotate the rotation adjustment part (9) according to the required angle until the pointer (904) points to the required angle indicated by the scale line (602) on the truncated cone part (601); ensure that the fitting groove (9011) at the lower end of the rotation adjustment part (9) is aligned with the stopper (603) on the truncated cone part (601) to ensure the stability and accuracy of the rotation adjustment part (9); Step 3: After the rotation adjustment part (9) is adjusted to the desired angle, re-tighten the large bolt (901) to ensure that the rotation adjustment part (9) is firmly fixed on the truncated cone part (601); check whether the pressing block (10) is in good contact with the rotation adjustment part (9), and adjust the third bolt (11) if necessary to ensure the stability of the pressing block (10); Step 4: If the blade (905) needs to be replaced, first loosen the small bolt (902) and carefully remove the old blade (905) from the mounting slot (906) inside the rotation adjustment part (9); Step 5: Place the new blade (905) into the mounting groove (906) inside the rotation adjustment part (9), ensuring that the blade (905) is aligned with the first positioning hole (909) and the second positioning hole (9010); use the positioning pin (903) to pass through the positioning hole to ensure the correct position of the blade (905); finally, use the small bolt (902) to pass through the countersunk hole (908) to fix the blade (905) on the rotation adjustment part (9); Step 6. Confirm that all bolts are tightened; check whether the rotation adjustment part (9) and the truncated cone part (601) are tightly fitted, and whether the clamping block (10) is secure; start the lathe at low speed, observe the working state of the tool, and ensure that the blade angle is accurate and the tool operates smoothly without abnormal vibration.

Images