An adjustable angle scraper for conical surface turning and use method thereof

Abstract

The present invention discloses a scraper. In order to solve the technical problems that the hard turning tools for external cylindrical turning of ordinary lathes are short in life and the scraping tools cannot be applied to ordinary lathes, an adjustable angle scraper for tapered turning and a method of using the scraper are provided. The scraper comprises a tool handle, a blade, a tool clamp and an eccentric adjustment pin. A fan-shaped groove is provided on the top of the front end of the tool handle. Two first mounting holes and a waist-shaped slide groove are provided at the bottom of the fan-shaped groove. The tool clamp is located in the fan-shaped groove. Two through holes and an adjustment hole are provided on the tool clamp. The tool clamp and the tool handle are connected by a first connecting piece located in the first mounting hole and the through hole. The rotation center of the blade coincides with that of the tool clamp. The large end of the eccentric adjustment pin is located in the waist-shaped slide groove, and the small end is located in the adjustment hole. A first scale line is provided along the arc at the edge of the top surface of the tool handle close to the fan-shaped groove, and a second scale line is provided along the arc at the edge of the top surface of the tool clamp close to the arc surface.

Description

Technical Field

[0001] The invention relates to a scraper, and in particular to an adjustable-angle scraper for conical surface turning and a use method thereof. Background Art

[0002] Gear parts in automobile transmissions, such as the single-axis differential gear, auxiliary box drive gear, synchronizer gear ring, etc., are often designed with a conical outer surface in order to transmit power stably. This type of conical surface requires high machining accuracy, requiring a roughness of Ra0.4, a diameter tolerance within 6 levels, and a cone angle tolerance of 10'. Taking the single-axis differential gear as an example, the original machining method was to use an ordinary external cylindrical turning tool on a CNC lathe after the part was heat treated, and install a standard C-type CBN blade to fine-turn the cone surface. Due to the high roughness requirements of the parts, low feed speed, long machining cycle, and low tool life of about 60 pieces / blade, in automatic line production, the blade needs to be replaced manually every two hours, affecting the machine tool operation rate of the entire line.

[0003] With the development of machine tools and tool technology, scraping tools are used when turning centers with Y-axis are used for external cylindrical machining. Since the cutting edge of the scraper blade is long, the wear of the blade tip of the turning blade is distributed to the entire cutting edge, which greatly improves the tool life. At the same time, there are no transverse cutting lines and the surface finish is high. The Chinese invention patent application with publication number CN209969790U discloses a tool setting device for gear cone hard turning blades, which effectively solves the problems of uncertainty in manually adjusting the blade angle and long switching time. However, ordinary lathes do not have a Y-axis and cannot use scraping tools, and ordinary lathes still account for the majority of factory production. Therefore, improving the life of hard turning tools for external cylindrical turning on ordinary lathes is still a technical problem that needs to be solved urgently. Summary of the invention

[0004] The invention provides an adjustable angle scraper for conical surface turning and a method for using the same in order to solve the technical problems that the hard turning tool for external cylindrical turning on ordinary lathes has a short life and the scraping tool cannot be applied to ordinary lathes.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An adjustable angle scraper for conical surface turning comprises a tool holder and a blade, and is special in that it also comprises a tool holder and an eccentric adjustment pin;

[0007] The front end of the knife handle is provided with a fan-shaped groove penetrating the end face and the side wall, and the bottom of the fan-shaped groove is provided with two first mounting holes and a waist-shaped sliding groove along the arc of the fan-shaped groove, the waist-shaped sliding groove is located at the center between the two first mounting holes, and the long side of the waist-shaped sliding groove is arranged along the radial direction of the arc of the fan-shaped groove (7) on the knife handle;

[0008] The tool holder is in a sector shape and is located in the sector groove, and the arc surface of the tool holder fits with the arc side wall of the sector groove; two through holes and an adjustment hole are provided on the tool holder along the arc of the tool holder, and the adjustment hole is located at the center between the two through holes; the tool holder and the tool handle are connected through a first connecting piece located in the first mounting hole and the through hole; the blade is arranged at the center of the sector of the tool holder, and the processing end of the blade extends to the outside of the tool holder, and the rotation center of the blade and the tool holder coincide; the large end of the eccentric adjustment pin is located in the waist-shaped slide groove, and the small end is located in the adjustment hole;

[0009] A first scale line is provided along the arc on the edge of the top surface of the tool handle close to the fan-shaped groove, and a second scale line is provided along the arc on the edge of the top surface of the tool holder close to the arc surface; each grid of the first scale line corresponds to a center angle of 2.1°, the center scale of the first scale line is a, a is the middle value of the minimum angle range covering the cone surface angle of a shaft speed distribution gear, the angle of the auxiliary box driving gear and the angle of the synchronizer combined gear ring, each grid of the second scale line corresponds to a center angle of 2°, and the number of scale grids of the first scale line and the second scale line is the same; the angle between the processing end of the blade and the rotation axis of the workpiece to be processed, the scale of the first scale line and the scale of the second scale line satisfy: when the angle between the processing end of the blade and the rotation axis of the workpiece to be processed is a, the first scale line is located at the center scale and the second scale line is located at the center scale and coincides.

[0010] Furthermore, a positioning pin hole is provided at the bottom of the fan-shaped groove, and a positioning pin matched with the positioning pin hole is provided at the bottom of the tool holder.

[0011] Furthermore, the tool holder is provided with a blade installation groove which passes through a side wall of the tool holder, and the blade is arranged in the blade installation groove.

[0012] Furthermore, a second mounting hole is formed on the blade, and a third mounting hole is formed on the top of the positioning pin along the axial direction of the positioning pin;

[0013] The blade and the blade holder are connected via a second connecting member that passes through the second mounting hole and the third mounting hole.

[0014] Furthermore, the first connecting member and the second connecting member are both screws.

[0015] Furthermore, the center scale a of the first scale line is 7.5°;

[0016] The number of scale grids of the first scale line and the second scale line is 30 grids;

[0017] The scale range of the first scale line is 6° to 9°.

[0018] Furthermore, the bottom surface of the tool handle is provided with a stop structure for fitting with a machine tool turret.

[0019] The present invention also provides a method for using the above-mentioned adjustable angle scraper for conical surface turning, which is special in that it comprises the following steps:

[0020] Observe the relationship between the center mark of the first scale line and the center mark of the second scale line;

[0021] If the center scale of the second scale line is located on the side of the center scale of the first scale line close to the minimum value of the first scale line, observe the reading of the first scale line when the second scale line coincides with the first scale line on the side close to the minimum value of the first scale line, and the reading is the angle between the blade and the axis of rotation of the workpiece to be processed;

[0022] If the center scale of the second scale line is located on the side of the center scale of the first scale line close to the maximum value of the first scale line, observe the reading of the first scale line when the second scale line coincides with the first scale line on the side close to the maximum value of the first scale line, and the reading is the angle between the blade and the axis of rotation of the workpiece to be processed;

[0023] If the center scale of the second scale line coincides with the center scale of the first scale line, then the center scale a of the first scale line is the angle between the blade and the axis of rotation of the workpiece to be processed.

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

[0025] 1. The invention discloses an adjustable angle scraper for conical surface turning. Due to the arrangement of an eccentric adjusting pin, a waist-shaped slide groove and a through hole, the blade can rotate along the fan-shaped groove together with the tool holder, thereby adjusting the angle between the blade and the surface of the workpiece to be processed. For workpieces whose outer circle length is less than the blade length, the outer circle scraping process on a common lathe can be implemented, which effectively solves the problem of low life of the outer circle blade after heat finishing, reduces the number of tool changes, improves the operating rate of the machine tool, and at the same time improves the processing efficiency and reduces the processing cost.

[0026] 2. In the present invention, the rotation range of the tool holder relative to the tool handle is ensured by the cooperation of the positioning pin and the positioning pin hole, thereby ensuring the adjustment accuracy.

[0027] 3. In the present invention, the blade is arranged in the blade installation groove, and the positioning pin, the positioning pin hole and the second connecting member are all coaxially arranged, which ensures that the rotation center of the blade and the tool holder coincides, and further ensures the adjustment accuracy of the scraper.

[0028] 4. In the present invention, the bottom surface of the tool handle is provided with a stop structure for fitting with the machine tool turret. When the tool handle is installed, the stop surface is attached to the turret, which can improve the rigidity of the tool handle and reduce tool vibration caused by the large contact surface during machining.

[0029] 5. The present invention also provides a method for using the above-mentioned scraper. Based on the setting of the first scale line and the second scale line in the above-mentioned scraper, the adjustment angle of the blade can be quickly determined to ensure the accuracy of the angle between the blade and the surface of the workpiece to be processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 An exploded view of an embodiment of an adjustable angle scraper for conical surface turning according to the present invention;

[0031] Figure 2 for Figure 1 Schematic diagram of the first scale line and the second scale line when the included angle between the middle scraper and the rotation axis of the workpiece to be processed is 7.5°;

[0032] Figure 3 for Figure 1 Schematic diagram of the first scale line and the second scale line when the included angle between the middle scraper and the rotation axis of the workpiece is 6.5°.

[0033] Among them: 1-tool handle, 2-eccentric adjustment pin, 3-tool clamp, 4-first connecting piece, 5-first scale line, 6-blade, 7-fan-shaped groove, 8-first mounting hole, 9-waist-shaped slide groove, 10-through hole, 11-adjustment hole, 12-positioning pin, 13-blade mounting groove, 14-second mounting hole, 15-second scale line, 16-second connecting piece, 17-positioning pin hole. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] The surface hardness of the conical surface of gear parts reaches HRC58-63 after carburizing and quenching. The high hardness causes rapid tool wear. For hardened steel turning, CBN turning inserts are currently commonly used, but their lifespan is generally short and the processing cost is high.

[0036] In order to improve the tool life of external cylindrical turning on ordinary lathes, for the fine turning of external conical surfaces whose cutting length is less than the blade length of the tool, the present invention designs an adjustable angle scraper, which is installed with a standard T-shaped scraper blade. By using this tool, the scraping processing of the external conical surface on the lathe can be achieved by inserting and turning, and at the same time, the requirements for the roughness and size of the conical surface are met, so that the tool life is greatly improved.

[0037] The plunge-turning method is that the tool is directly against the processing surface along the X-axis of the machine tool, without axial feed, and the tapered surface is processed in a radial forming manner. Therefore, the installation angle of the tool directly determines the angle of the tapered surface. Since the tolerance of the tapered surface angle is only 10', the installation angle tolerance of the tool must also be guaranteed to be within 10'. Therefore, the scraper is designed to have a fine-tunable main deflection angle structure.

[0038] Taking a specific embodiment of the present invention as an example, the angle-adjustable scraper for conical surface turning of the present invention and the use method thereof are specifically described. The processing conditions targeted by this embodiment are that the cone surface angle of the one-axis differential gear is 6.5°±5′, the angle of the auxiliary box driving gear is 7.5°, and the angle of the synchronizer combined gear ring is 8°. Therefore, the scraper angle adjustment range is designed to be 7.5°±1.5°, which can cover all the above parts at the same time.

[0039] The exploded diagram of the scraper structure is as follows Figure 1 As shown, the blade 6 is of standard shape TCGW16T308, the base of the blade 6 is cemented carbide, the processing end is a straight edge, and CBN is welded on it. The front end of the handle 1 is provided with a fan-shaped groove 7 that runs through the end face and the side wall, and the bottom of the fan-shaped groove 7 is provided with two first mounting holes 8 and a waist-shaped slide groove 9 along the arc of the fan-shaped groove 7. The waist-shaped slide groove 9 is located at the center between the two first mounting holes 8, and the long side of the waist-shaped slide groove 9 is arranged along the radial direction of the arc of the fan-shaped groove on the handle 1. The tool holder 3 is in the shape of a fan, and is located in the fan-shaped groove 7. The arc surface of the tool holder 3 fits the arc side wall of the fan-shaped groove 7. Two through holes 10 and an adjusting hole 11 are provided on the tool clamp 3 along the arc of the tool clamp 3, and the adjusting hole 11 is located at the center between the two through holes 10. The tool clamp 3 and the tool handle 1 are connected by a first connecting piece 4 located in the first mounting hole 8 and the through hole 10. The blade 6 is arranged at the fan-shaped center of the tool clamp 3, and the processed end of the blade 6 extends to the outside of the tool clamp 3. A positioning pin hole 17 is provided at the bottom of the fan-shaped groove 7, and a positioning pin 12 matched with the positioning pin hole 17 is provided at the bottom of the tool clamp 3. A blade mounting groove 13 penetrating the side wall of the tool clamp 3 is provided on the tool clamp 3, and the blade 6 is arranged in the blade mounting groove 13. A second mounting hole 14 is provided on the blade 6, and a third mounting hole is provided on the top of the positioning pin 12 along the axial direction of the positioning pin 12. The blade 6 and the tool clamp 3 are connected by a second connecting piece 16 penetrating the second mounting hole 14 and the third mounting hole, so that the rotation center of the blade 6 coincides with that of the tool clamp 3, and the large end of the eccentric adjusting pin 2 is located in the waist-shaped slide groove 9, and the small end is located in the adjusting hole 11.

[0040] The first connecting member 4 can be specifically a clamping screw, and the second connecting member 16 can be specifically a countersunk screw. The blade 6 is mounted on the tool holder 3 through the second connecting member 16. A positioning pin 12 is designed at the bottom of the tool holder 3. The positioning pin 12 is coaxial with the second mounting hole 14 of the blade 6. The second mounting hole 14 is a screw hole. At the same time, the positioning pin 12 is installed in cooperation with the positioning pin hole 17 at the bottom of the fan-shaped groove 7 of the tool handle 1. Therefore, the tool holder 3 can rotate around the axis of the second mounting hole 14 of the blade 6. There are two through holes 10 and an adjustment hole 11 on the tool holder 3. The small end of the eccentric adjustment pin 2 is installed in the adjustment hole 11 of the tool holder 3, and the large end is installed in the waist-shaped slide groove 9 on the tool handle 1. The tool holder 3 is installed on the tool handle 1 through two first connecting members 4. The tool handle 1 is a 25X25 blade square. A stopper structure can also be designed at the bottom of the tool handle 1. When the tool handle 1 is installed, the stopper surface is attached to the turret, which can improve the rigidity of the tool handle and reduce the vibration of the tool caused by the large processing contact surface.

[0041] The edge of the knife handle 1 near the fan-shaped groove 7 is provided with a first scale line 5 along the arc. The first scale line 5 includes a main scale line and a number for adjusting the angle. Each grid is 2.1°, and there are 30 grids in total. The top surface of the knife holder 3 is provided with a second scale line 15 along the arc near the arc surface. The scale on the second scale line 15 is used as a secondary scale line. Each grid is 2°, and there are 30 grids in total. Figure 2 As shown, when the main deflection angle of the tool is 7.5°, that is, when the angle between the blade 6 and the axis of rotation of the workpiece to be processed is 7.5°, the 7.5° scale line of the main scale line coincides with the center scale of the secondary scale line. When the eccentric adjustment pin 2 is rotated with a wrench, the large end of the eccentric adjustment pin 2 moves in the waist-shaped slide groove 9 of the tool handle 1. At the same time, the small end of the eccentric adjustment pin 2 drives the tool holder 3 to rotate around the axis of the second mounting hole 14 of the blade 6, thereby achieving the function of adjusting the main deflection angle. The scraper angle adjustment range is 7.5°±1.5°. According to the principle of scraper angle adjustment, Figure 2 As shown in the figure, when the scraper main deflection angle is 7.5 degrees, the straight line where the eccentric distance of the eccentric adjustment pin 2 is located coincides with the center line of the waist-shaped slide groove 9 of the handle 1, and at this time, the main scale line 7.5° line coincides with the secondary scale line. Figure 3 As shown in the figure, when the main deflection angle of the scraper is adjusted to 6°, the angle between the straight line where the eccentric distance of the eccentric adjustment pin 2 is located and the center line of the waist-shaped slide groove 9 of the handle 1 is 90°, and the main scale line 6° line coincides with the secondary scale line. The turning radius of the small end of the eccentric adjustment pin 2 is 20mm, so the eccentric distance size of the eccentric adjustment pin is:

[0042] Eccentricity = 20Xsin1.5° = 0.524mm

[0043] The adjustment accuracy of the scraper scale is 0.1°. When using the scraper, first read whether the center line of the secondary scale is on the left or right of the 7.5° line of the main scale. If it is on the left, it means that the main deflection angle is less than 7.5°. Then observe which line of the main scale on the left of 7.5° coincides with the secondary scale line. The value of this line is the main deflection angle value. On the contrary, when the main scale 7.5° line is on the right of the center line of the secondary scale, the coincidence line of the main scale on the right is the main deflection angle value.

[0044] In the hot-turning process of the cone surface of the first-axis differential gear, this adjustable angle scraper is applied, the cutting speed is 150m / min, the axial feed is 0.06mm / r, the surface roughness can reach Ra0.2, and the processing quality meets the process requirements. At the same time, the tool life is increased from 60 pieces to 800 pieces, the cost of a single tool is reduced by 0.4 yuan, and the processing time is reduced from 30 seconds to 10 seconds, and the cutting efficiency is increased by 66%.

[0045] In other embodiments of the present invention, the specific settings of the first scale line 5 and the second scale line 15 can also be adjusted to meet different usage conditions. In other embodiments of the present invention, each grid of the first scale line 5 corresponds to a central angle of 2.1°, the center scale of the first scale line 5 is a, a is the middle value of the minimum angle range covering the cone angle of the one-axis speed differential gear, the angle of the auxiliary box drive gear and the angle of the synchronizer combined gear ring, each grid of the second scale line 15 corresponds to a central angle of 2°, the number of scale grids of the first scale line 5 and the second scale line 15 is the same, the angle between the processing end of the blade 6 and the axis of rotation of the workpiece to be processed, the scale of the first scale line 5 and the scale of the second scale line 15 meet: when the angle between the processing end of the blade 6 and the axis of rotation of the workpiece to be processed is a, the first scale line 5 is located at the center scale and the second scale line 15 is located at the center scale and coincides.

[0046] The design and application of the adjustable angle scraper for conical surface turning of the present invention enables the external circle scraping process on ordinary lathes to be implemented, effectively solves the problem of low life of external circle blades after heat finishing, reduces the number of tool changes, improves the operation rate of the machine tool, and at the same time, improves the processing efficiency and reduces the processing cost.

[0047] The specific application is that the use process of the adjustable angle scraper for conical surface turning of the present invention is as follows:

[0048] 1) Prepare the tool: Install the handle 1 of the scraper on the turret of the CNC lathe through the stopper structure at the bottom of the handle 1, ensure that the stopper at the bottom of the handle 1 is attached to the turret, and lock the handle 1. Then, install the blade 6 on the tool holder 3, lock the second connecting piece 16, and press the blade 6 onto the tool holder 3.

[0049] 2) Adjust the tool angle: pre-tighten the first connecting piece 4, then use the hexagonal wrench to rotate the eccentric adjustment pin 2, according to the cone angle of the workpiece to be processed, until the corresponding scale line on the main scale line coincides with the secondary scale line, and then lock the first connecting piece 4.

[0050] 3) Loading: Install the workpiece to be processed on the machine tool fixture.

[0051] 4) Tool setting: Figure 1 The tool tip on the left is the tool setting point. Measure the tool length in the X and Z directions in the machine tool at this time, and modify the tool shape compensation of the corresponding tool number.

[0052] 5) Program preparation: Prepare CNC program based on the machining method of insert turning.

[0053] 6) Trial cutting: Start the program and complete the scraping process.

[0054] Steps 4) to 6) can all be completed through the machine tool's own functions.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for using an adjustable angle scraper for conical surface turning, the adjustable angle scraper for conical surface turning comprising a handle (1) and a blade (6), characterized in that: It also includes a tool holder (3) and an eccentric adjustment pin (2); The front end of the knife handle (1) is provided with a fan-shaped groove (7) penetrating the end surface and the side wall, and the bottom of the fan-shaped groove (7) is provided with two first mounting holes (8) and a waist-shaped slide groove (9) along the arc of the fan-shaped groove (7), and the waist-shaped slide groove (9) is located at the center between the two first mounting holes (8), and the long side of the waist-shaped slide groove (9) is arranged along the radial direction of the arc of the fan-shaped groove (7) on the knife handle (1); The tool holder (3) is in the shape of a sector and is located in the sector groove (7). The arc surface of the tool holder (3) fits with the arc side wall of the sector groove (7). Two through holes (10) and an adjustment hole (11) are provided on the tool holder (3) along the arc of the tool holder (3). The adjustment hole (11) is located at the center between the two through holes (10). The tool holder (3) and the tool handle (1) are connected via a first connecting piece (4) located in the first mounting hole (8) and the through hole (10). The blade (6) is arranged at the center of the sector of the tool holder (3), and the processing end of the blade (6) extends to the outside of the tool holder (3). The rotation center of the blade (6) coincides with that of the tool holder (3). The large end of the eccentric adjustment pin (2) is located in the waist-shaped slide groove (9), and the small end is located in the adjustment hole (11); The top surface of the tool handle (1) is provided with a first scale line (5) along the arc near the edge of the fan-shaped groove (7), and the top surface of the tool holder (3) is provided with a second scale line (15) along the arc near the edge of the arc surface; each grid of the first scale line (5) corresponds to a central angle of 2.1°, and the center scale of the first scale line (5) is a, which is the middle value of the minimum angle range covering the cone angle of the first shaft speed distribution gear, the angle of the auxiliary box driving gear and the angle of the synchronizer combined gear ring, and the second scale line (15) is provided along the arc. Each grid of the two scale lines (15) corresponds to a central angle of 2°, and the number of scale grids of the first scale line (5) and the second scale line (15) is the same; the angle between the processing end of the blade (6) and the rotation axis of the workpiece to be processed, the scale of the first scale line (5) and the scale of the second scale line (15) satisfy: when the angle between the processing end of the blade (6) and the rotation axis of the workpiece to be processed is a, the first scale line (5) is located at the center scale and the second scale line (15) is located at the center scale and coincides; It is characterized by comprising the following steps: Observe the relationship between the center mark of the first scale line (5) and the center mark of the second scale line (15); If the center scale of the second scale line (15) is located on the side of the center scale of the first scale line (5) close to the minimum value of the first scale line (5), the reading of the first scale line (5) when the second scale line (15) coincides with the first scale line (5) is observed on the side close to the minimum value of the first scale line (5), and the reading is the angle between the blade (6) and the rotation axis of the workpiece to be processed; If the center scale of the second scale line (15) is located on the side of the center scale of the first scale line (5) close to the maximum value of the first scale line (5), the reading of the first scale line (5) when the second scale line (15) coincides with the first scale line (5) is observed on the side close to the maximum value of the first scale line (5), and the reading is the angle between the blade (6) and the axis of rotation of the workpiece to be processed; If the center scale of the second scale line (15) coincides with the center scale of the first scale line (5), then the center scale a of the first scale line (5) is the angle between the blade (6) and the axis of rotation of the workpiece to be processed.

2. The method for using the adjustable angle scraper for conical surface turning according to claim 1, characterized in that: A positioning pin hole (17) is provided at the bottom of the fan-shaped groove (7), and a positioning pin (12) matched with the positioning pin hole (17) is provided at the bottom of the tool holder (3).

3. The method for using the adjustable angle scraper for conical surface turning according to claim 2, characterized in that: The knife holder (3) is provided with a blade installation groove (13) which penetrates the side wall of the knife holder (3), and the blade (6) is arranged in the blade installation groove (13).

4. The method for using the adjustable angle scraper for conical surface turning according to claim 3, characterized in that: The blade (6) is provided with a second mounting hole (14), and the top of the positioning pin (12) is provided with a third mounting hole along the axial direction of the positioning pin (12); The blade (6) and the blade holder (3) are connected via a second connecting piece (16) that passes through the second mounting hole (14) and the third mounting hole.

5. The method for using the adjustable angle scraper for conical surface turning according to claim 4, characterized in that: The first connecting member (4) and the second connecting member (16) are both screws.

6. The method for using the adjustable angle scraper for conical surface turning according to claim 5, characterized in that: The center scale a of the first scale line (5) is 7.5°; The first scale line (5) and the second scale line (15) both have 30 scale grids; The scale range of the first scale line (5) is from 6° to 9°.

7. The method for using the adjustable angle scraper for conical surface turning according to claim 6, characterized in that: The bottom surface of the tool handle (1) is provided with a stop structure for fitting with a machine tool turret.

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