A tool for machining side holes of valve body shaft

Abstract

A tool for processing side holes of a valve body shaft, comprising an angle adjustment mechanism, a punching mechanism and a supporting mechanism. The punching mechanism is slidably mounted on the angle adjustment mechanism, and the angle of the punching mechanism is adjusted by the angle adjustment mechanism. A drill bit for processing the side holes of the shaft is mounted on the punching mechanism, and the drill bit is fed by the sliding movement of the punching mechanism on the angle adjustment mechanism. During the feeding process of the drill bit, the valve body is punched. The supporting mechanism is slidably mounted on the punching mechanism, and the supporting structure can be fed simultaneously with the punching mechanism or move relative to the punching mechanism, and the supporting mechanism abuts against the end of the drill bit, and the suspended side of the drill bit is supported by the supporting mechanism to prevent deformation when the drill bit abuts against the valve body, thereby preventing the drill bit from jumping during rotation, thereby ensuring the processing accuracy of the side holes of the valve body shaft and preventing the drill bit from breaking, and a ball is arranged in the supporting plate of the supporting mechanism to reduce the friction between the supporting mechanism and the drill bit.

Description

Technical Field

[0001] The invention belongs to the technical field of numerically controlled machine tools, and in particular relates to a tool for machining side holes of a valve body shaft. Background Art

[0002] CNC machine tools are digitally controlled machine tools, which are automated machine tools equipped with a program control system. The control system can logically process programs specified by control codes or other symbolic instructions, decode them, express them in coded numbers, and input them into the CNC device through information carriers. After calculation and processing, the CNC device sends various control signals to control the movement of the machine tool and automatically process the parts according to the shape and size required by the drawing.

[0003] When CNC machine tools are used to process some special valve bodies, it is necessary to drill the axial side holes of the valve body. Currently, most of the axial side holes on the market are processed by drill bits; however, since the axis of the axial side hole is tilted relative to the axis of the valve body, in the initial stage of the drill bit processing the valve body, one side of the drill bit is cutting the workpiece while the other side is in an unloaded state, causing the drill bit to bend and cause the drill bit to jump, affecting the processing accuracy of the axial side hole. At the same time, when the drill bit has a large feed rate, drill bit breakage and other phenomena are prone to occur, affecting the valve body processing efficiency. Summary of the invention

[0004] In view of the above shortcomings, the technical problem to be solved by the present invention is to provide a valve body shaft side hole processing tool, which is used to support the tool for processing the shaft side hole to prevent the tool from bending and facilitate the adjustment of the drilling angle.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A tool for processing side holes of a valve body shaft, comprising an angle adjustment mechanism, a punching mechanism and a supporting mechanism. The punching mechanism is slidably mounted on the angle adjustment mechanism, and the angle of the punching mechanism is adjusted by the angle adjustment mechanism. A drill bit for processing side holes of the shaft is mounted on the punching mechanism. The supporting mechanism is slidably mounted on the punching mechanism, and the supporting mechanism abuts against the drill bit, and the drill bit is supported by the supporting mechanism. A limit frame is provided on the supporting mechanism, and the limit frame is adapted to the angle adjustment mechanism so as to limit the support mechanism by the angle adjustment mechanism, so that the limit frame moves relative to the punching mechanism; the supporting mechanism comprises a supporting plate, an annular ball groove is provided in the supporting plate, and balls are provided in the ball groove, the ball groove comprises a through groove and a circulation groove connected to the through groove, the through groove is arranged along the circumference of the drill bit, and the balls extend out of the supporting plate through the through groove.

[0007] As a preferred solution of the present invention, the support mechanism includes a support frame and a support plate. The support frame is slidably installed on the punching mechanism. The limit frame and the support plate are respectively arranged at both ends of the support frame. The support frame abuts against the side wall of the drill bit through the support plate.

[0008] As a preferred solution of the present invention, the angle adjustment mechanism is provided with a perforated guide rail, the perforated mechanism is slidably mounted on the angle adjustment mechanism via the perforated guide rail, the limit frame is adapted to the perforated track, and the limit frame is limited by the perforated track.

[0009] As a preferred solution of the present invention, a spring is provided between the limiting frame and the punching mechanism.

[0010] As a preferred solution of the present invention, the punching mechanism includes a tool holder assembly and a tool holder driving assembly respectively installed on the angle adjustment mechanism, the tool holder driving assembly is connected to the tool holder assembly to drive the tool holder assembly to move, and the supporting mechanism is slidably installed on the tool holder assembly.

[0011] As a preferred solution of the present invention, the tool holder assembly includes a punching seat, a rotating seat and a punching motor. The punching seat is slidably mounted on the angle adjustment mechanism, the rotating seat is rotatably mounted in the punching seat, the drill bit is mounted in the rotating seat, and the punching motor is connected to the rotating seat to drive the punching seat to rotate.

[0012] As a preferred solution of the present invention, a guide groove is provided on the punching seat, and the supporting mechanism is slidably installed on the punching seat through the guide groove.

[0013] As a preferred solution of the present invention, the drill bit includes a drilling portion and a rotating shaft portion which are connected to each other, the drill bit is mounted on the punching mechanism via the rotating shaft portion, and the supporting mechanism abuts against the outer side of the rotating shaft portion.

[0014] As a preferred solution of the present invention, the angle adjustment mechanism includes a base, an adjustment plate, an adjustment assembly and a locking member, the punching mechanism is installed on the adjustment plate, the adjustment plate is rotatably installed on the base, the adjustment assembly is connected to the adjustment plate to drive the adjustment plate to rotate, the locking member is connected to the adjustment assembly, and the adjustment assembly is locked by the locking member.

[0015] As a preferred solution of the present invention, the adjustment assembly includes an angle adjustment motor, a guide rod and a connecting rod. The guide rod is slidably installed on the base, and the two ends of the connecting rod are rotatably connected to the guide rod and the adjustment plate respectively. The angle adjustment motor is connected to the guide rod through the first screw assembly to drive the guide rod to move. Locking blocks adapted to the locking piece are installed at both ends of the guide rod.

[0016] The beneficial effects of the present invention are as follows: (1) the suspended side of the drill bit is supported by a support mechanism, so that one side of the drill bit contacts the valve body and the other side contacts the support mechanism, keeping the axis of the drill bit and the axis of the drilling mechanism on the same straight line, thereby preventing the drill bit from bending or jumping during rotation, ensuring the processing accuracy of the side hole of the valve body shaft, and preventing the drill bit from breaking.

[0017] (2) An annular ball groove is provided on the support plate to facilitate the movement of the balls in the ball groove, thereby converting the sliding friction between the drill bit and the support plate into rolling friction, thereby reducing the friction between the drill bit and the support plate.

[0018] (3) By setting the angle adjustment mechanism, the inclination angle of the drill bit can be adjusted, thereby facilitating the processing of valve body shaft side holes at different inclination angles, thereby improving the applicable workpiece processing range of the processing tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the side hole of the valve body shaft in the background technology.

[0020] Figure 2 It is a schematic diagram of the structure of this tool.

[0021] Figure 3 yes Figure 2 Schematic diagram of the structure after rotating at a certain angle.

[0022] Figure 4 It is a structural schematic diagram of the angle adjustment mechanism.

[0023] Figure 5 It is a schematic diagram of the structure after some panels of the angle adjustment mechanism are hidden.

[0024] Figure 6 It is a schematic diagram of the structure of the regulating component.

[0025] Figure 7 It is an assembly diagram of the punching mechanism and the supporting mechanism.

[0026] Figure 8 It is a structural schematic diagram of the support plate.

[0027] Fig. 9 It is a structural diagram of the mounting plate.

[0028] Figure numerals: angle adjustment mechanism 1, punching guide rail 1-1, base 1-2, adjustment plate 1-3, adjustment assembly 1-4, locking member 1-5, angle adjustment motor 1-6, guide rod 1-7, connecting rod 1-8, first screw rod assembly 1-9, locking block 1-10, mounting groove 1-11, slide groove 1-12, guide block 1-13, support column 1-14, punching mechanism 2, tool holder assembly 2-1, tool holder drive assembly 2-2, punching Seat 2-3, rotating seat 2-4, punching motor 2-5, guide groove 2-6, second screw assembly 2-7, tool holder drive motor 2-8, support mechanism 3, limit frame 3-1, support frame 3-2, support plate 3-3, ball groove 3-4, through groove 3-5, circulation groove 3-6, base plate 3-7, mounting plate 3-8, countersunk screw 3-9, drill bit 4, drilling part 4-1, rotating shaft part 4-2, spring 5, valve body shaft side hole 6, ball 7. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] A tool for processing a side hole of a valve body shaft comprises an angle adjustment mechanism 1, a punching mechanism 2 and a supporting mechanism 3. The punching mechanism 2 is slidably mounted on the angle adjustment mechanism 1, and the angle of the punching mechanism 2 is adjusted by the angle adjustment mechanism 1. A drill bit 4 for processing the side hole of the shaft is mounted on the punching mechanism 2. The drilling mechanism 2 slides on the angle adjustment mechanism 1 to realize feeding of the drill bit 4. During the feeding process of the drill bit 4, the valve body is punched. The supporting mechanism 3 is slidably mounted on the punching mechanism 2. The supporting structure 3 can be fed simultaneously with the punching mechanism 2 or move relative to the punching mechanism 2, and the supporting mechanism 3 abuts against the drill bit 4. The suspended side of the drill bit 4 is supported by the supporting mechanism 3, so that one side of the drill bit 4 contacts the valve body and the other side contacts the supporting mechanism 3, and the axis of the drill bit 4 is kept on the same straight line as the axis of the punching mechanism 2, thereby preventing the drill bit 4 from jumping during rotation, ensuring the processing accuracy of the side hole of the valve body shaft, and preventing the drill bit 4 from breaking.

[0031] The angle adjustment mechanism 1 includes a base 1-2, an adjustment plate 1-3, an adjustment component 1-4 and a locking member 1-5. The base 1-2 is fixed on the turret of the CNC machine tool. The adjustment plate 1-3 is rotatably mounted on the base 1-2 through a rotating shaft. The punching mechanism 2 is mounted on the adjustment plate 1-3. The adjustment component 1-4 is connected to the adjustment plate 1-3. The adjustment plate 1-3 is driven to rotate relative to the base 1-2 by the adjustment component 1-4, so as to adjust the punching mechanism 2 mounted on the adjustment plate 1-3. The inclination angle between the punching mechanism 2 and the valve body is changed to change the inclination angle between the drill bit 4 and the axis of the valve body, thereby realizing the processing of the side hole of the valve body axis; the locking member 1-5 is installed on the base 1-2, and the locking member 1-5 is connected to the adjusting component 1-4, and the adjusting component 1-4 is locked by the locking member 1-5. When the inclination angle of the punching mechanism 2 is adjusted to the right position, the angle adjustment mechanism 1 is locked by the locking member 1-5 to prevent the angle adjustment mechanism 1 from changing during the punching process, thereby improving the stability of the device.

[0032] The adjusting assembly 1-4 includes an angle adjusting motor 1-6, a guide rod 1-7 and a connecting rod 1-8. The guide rod 1-7 is slidably installed on the base 1-2. The two ends of the connecting rod 1-8 are rotatably connected to the guide rod 1-7 and the adjusting plate 1-3 respectively. The angle adjusting motor 1-6 is connected to the guide rod 1-7 through a first screw assembly 1-9. Preferably, the first screw assembly 1-9 includes a screw and a slider installed on the screw through a thread. The angle adjusting motor 1-6 is connected to the screw, and the slider is installed on the guide rod 1-7. The first screw assembly 1-9 is driven by the angle adjusting motor 1-6 to work, thereby driving the guide rod 1-7 to translate on the base 1-2. The connecting rod 1-8 is driven to swing through the guide rod 1-7, thereby driving the adjusting plate 1-3 to arch, thereby realizing the adjustment of the punching mechanism 2 installed on the adjusting plate 1-3. Locking blocks 1-10 adapted to the locking member 1-5 are installed at both ends of the guide rod 1-7. As a preferred embodiment, the locking member 1-5 is an electromagnet, and the locking block 1-10 is an iron block. The locking member 1-5 adsorbs the locking block 1-10 to lock the locking block 1-10, thereby locking the guide rod 1-7 on the base 1-2.

[0033] A mounting groove 1-11 is provided in the middle of the base 1-2, and the adjustment plate 1-3 is rotatably installed in the mounting groove 1-11 through a rotating shaft. A sliding groove 1-12 is provided on the side wall of the mounting groove 1-11, and both ends of the guide rod 1-7 extend into the sliding groove 1-12. The locking member 1-5 is fixed in the sliding groove 1-12. At the same time, the locking block 1-10 is arranged in the sliding groove 1-12, and the locking block 1-10 is adsorbed and fixed on the inner wall of the sliding groove 1-12 through the locking member 1-5, so that the guide rod 1-7 is locked with the base 1-2. As a preferred embodiment, the locking block 1-10 can move axially relative to the axis of the guide rod 1-7, so as to facilitate the adsorption of the locking block 1-10 on the locking member 1-5 to achieve the locking of the guide rod 1-7.

[0034] In order to facilitate the connection between the guide rod 1-7 and the slider of the first screw assembly 1-9, a guide block 1-13 is provided in the middle of the guide rod 1-7, the slider of the first screw assembly 1-9 is fixed on the guide block 1-13, a support column 1-14 is provided on the upper end surface of the guide block 1-13, a spring is provided between the support column 1-14 and the guide block 1-13, the support column 1-14 is lifted up by the spring, the adjustment plate 1-3 is at least arranged to extend above the support column 1-14, and the support column 1-14 provides a certain lifting support force to the adjustment plate 1-3, so as to facilitate the adjustment plate 1-3 to arch up and realize the angle adjustment of the punching mechanism 2. Preferably, a guide rail is installed in the middle of the installation groove 1-11, and the guide block 1-3 is connected to the guide rail to further guide the movement of the guide rod 1-7 and improve the working stability of the angle adjustment mechanism 1.

[0035] A punching guide rail 1 - 1 is installed on the adjustment plate 1 - 3 , and the punching mechanism 2 is slidably installed on the angle adjustment mechanism 1 through the punching guide rail 1 - 1 to guide the movement of the punching mechanism 2 .

[0036] The punching mechanism 2 includes a tool holder assembly 2-1 and a tool holder drive assembly 2-2. The tool holder assembly 2-1 and the tool holder drive assembly 2-2 are respectively installed on the angle adjustment mechanism 1. The tool holder assembly 2-1 is used to install the drill bit 4. The tool holder drive assembly 2-2 is connected to the tool holder assembly 2-1 and is used to drive the tool holder assembly 2-1 to move. The support mechanism 3 is slidably installed on the tool holder assembly 2-1.

[0037] The tool holder assembly 2-1 includes a punching seat 2-3, a rotating seat 2-4 and a punching motor 2-5. The punching seat 2-3 is slidably installed on the angle adjustment mechanism 1 through the punching guide rail 1-1. The rotating seat 2-4 is rotatably installed in the punching seat 2-3. The drill bit 4 is installed in the rotating seat 2-4. The punching motor 2-5 is connected to the rotating seat 2-4. The punching motor 2-5 drives the punching seat 2-3 to rotate, thereby driving the drill bit 4 on the rotating seat 2-4 to rotate, which is convenient for drilling holes in the valve body.

[0038] The tool holder drive assembly 2-2 includes a second screw rod assembly 2-7 and a tool holder drive motor 2-8. The structure of the second screw rod assembly 2-7 is consistent with that of the first screw rod assembly 1-9, both of which include a screw rod and a slider. The screw rod is connected to the tool holder drive motor 2-8, and the tool holder drive motor 2-8 is fixed on the adjusting plate 1-3. The slider is fixed on the punching seat 2-3. The second screw rod assembly 2-7 is driven by the tool holder drive motor 2-8 to work, thereby driving the punching seat 2-3 to slide on the adjusting plate 1-3, thereby driving the drill bit 4 to move toward the valve body to be processed.

[0039] A guide groove 2-6 is provided on the punching seat 2-3, and the supporting mechanism 3 is slidably installed on the punching seat 2-3 through the guide groove 2-6.

[0040] The supporting mechanism 3 comprises a limit frame 3-1, a supporting frame 3-2 and a supporting plate 3-3. The limit frame 3-1 and the supporting plate 3-3 are respectively fixed on both sides of the supporting frame 3-2. The cross section of the supporting frame 3-2 is an inverted T-shape. The supporting frame 3-2 is slidably installed in the guide groove 2-6. The limit frame 3-1 is adapted to the punching guide rail 1-1 of the angle adjustment mechanism 1, that is, the moving direction of the limit frame 3-1 and the length direction of the punching guide rail 1-1 are located on the same straight line, so that the limit frame 3-1 interferes with the punching guide rail 1-1 during the translation process, and the supporting mechanism 3 is limited by the punching guide rail 1-1, so that the limit frame 3-1 moves relative to the punching mechanism 2; the supporting plate 3-3 abuts against the side wall of the drill bit 4, provides a certain radial force to the drill bit 4, so that the forces on both sides of the drill bit 4 are in a balanced state, thereby preventing the drill bit 4 from jumping. A spring 5 is provided between the limiting frame 3-1 and the punching seat 2-3, and the spring 5 applies a force to the limiting clamp 3-1 toward the punching seat 2-3.

[0041] The support mechanism 3 includes a support plate 3-3, in which an annular ball groove 3-4 is provided, in which a ball 7 is provided, and the ball 7 abuts against the surface of the drill bit 4 to reduce the friction between the support plate 3-3 and the drill bit 4. In order to further reduce the friction between the ball 7 and the drill bit 4 and the inner wall of the support plate 3-3, the ball groove 3-4 includes a through groove 3-5 and a circulation groove 3-6, and the through groove 3-5 is connected to the circulation groove 3-6, so that the ball groove 3-4 is an annular shaped groove structure, so that the ball 7 can reciprocate in the annular groove structure, the ball 7 extends out of the support plate 3-3 through the through groove 3-5, so that the ball 7 can abut against the drill bit 4, the through groove 3-5 is arranged along the rotation direction of the drill bit 4, so that the ball in the through groove 3-5 can move along the rotation direction of the drill bit 4, and the circulation groove 3-6 is arranged in an inclined manner in the support plate 3-3, so that the ball 7 on one side of the through groove 3-5 can be circulated to the other side of the through groove 3-5 through the circulation groove 3-6.

[0042] The support plate 3-3 includes a base plate 3-7 and a mounting plate 3-8. The cross-section of the mounting plate 3-8 is stepped, and the through groove 3-5 is arranged on the lowest end surface of the mounting plate 3-8. The base plate 3-7 is fixed on the support frame 3-2, and the mounting plate 3-8 is fixed on the base plate 3-7 by countersunk screws 3-9.

[0043] Specifically, during the rotation of the drill bit 4, the ball 7 will move in the through groove 3-5 as the drill bit 4 rotates. As the ball 7 continues to move, the ball 7 moves from the through groove 3-5 to the circulation groove 3-6, and then moves from the circulation groove 3-6 to the through groove 3-5, thereby realizing the circulation motion of the ball 7 in the ball groove 3-4, thereby converting the sliding friction between the drill bit 4 and the support plate 3-3 into rolling friction, thereby reducing the friction between the drill bit 4 and the support plate 3-3.

[0044] The drill bit 4 includes a drilling portion 4-1 and a rotating shaft portion 4-2 which are connected to each other. The drilling portion 4-1 is installed on the punching mechanism 2 through the rotating shaft portion 4-2. The rotating shaft portion 4-1 is used to drill the workpiece. The support plate 3-3 of the support mechanism 3 abuts against the outer side of the rotating shaft portion 4-2. The drill bit 4 is supported by the support mechanism 3 to prevent the drill bit 4 from bending.

[0045] The working principle of this tool is as follows:

[0046] (1) The tool holder assembly 2-1 in an unloaded state is quickly moved by the tool holder driving assembly 2-2, so that the drill bit 4 on the tool holder assembly 2-1 is quickly moved to the edge of the valve body. During this process, there is no interference between the limit frame 3-1 and the punching guide rail 1-1, that is, the limit frame 3-1 moves with the tool holder assembly 2-1, so that the limit frame 3-1 moves toward the punching guide rail 1-1.

[0047] (2) When the drill bit 4 on the tool holder assembly 2-1 moves to the edge of the valve body, at this time, the limit frame 3-1 abuts against the end of the punching guide rail 1-1, and the support mechanism 3 cannot move with the movement of the tool holder assembly 2-1. The tool holder driving assembly 2-2 continuously drives the tool holder assembly 2-1 to feed, so that the drill bit 4 on the tool holder assembly 2-1 processes the valve body. The valve body generates a certain radial force on the drill bit 4, and the support mechanism 3 also generates a certain radial force on the drill bit 4, so that the drill bit 4 is in a force balance state, ensuring that the drill bit 4 does not deform. During the feeding process of the drill bit 4, the drill bit 4 translates relative to the support plate 3-3.

[0048] (3) After the side hole of the valve body shaft is processed, the tool holder driving assembly 2-2 drives the tool holder assembly 2-1 to retract. During the retraction process, the support mechanism 3 first moves relative to the drill bit 4. When the limit frame 3-1 is reset to the punching seat 2-3, the support mechanism 3 retracts simultaneously with the tool holder assembly 2-1.

[0049] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0050] Although this article uses more terms corresponding to the figure marks in the figures, it does not exclude the possibility of using other terms; these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A tool for machining a side hole of a valve body shaft, characterized in that: The invention comprises an angle adjustment mechanism (1), a punching mechanism (2) and a support mechanism (3), wherein the punching mechanism (2) is slidably mounted on the angle adjustment mechanism (1), and the angle of the punching mechanism (2) is adjusted by the angle adjustment mechanism (1); a drill bit (4) for machining a shaft side hole is mounted on the punching mechanism (2); the support mechanism (3) is slidably mounted on the punching mechanism (2), and the support mechanism (3) abuts against the drill bit (4), and the drill bit (4) is supported by the support mechanism (3); a limit frame (3-1) is provided on the support mechanism (3), and the limit frame (3-1) is in contact with the angle adjustment mechanism (1). The joint mechanism (1) is adapted to limit the support mechanism (3) through the angle adjustment mechanism (1), so that the limit frame (3-1) moves relative to the punching mechanism (2); the support mechanism (3) comprises a support plate (3-3), a ball groove (3-4) is provided in the support plate (3-3), a ball is provided in the ball groove (3-4), the ball groove (3-4) comprises a through groove (3-5) and a circulation groove (3-6) connected to the through groove (3-5), the through groove (3-5) is arranged along the circumference of the drill bit (4), and the ball extends out of the support plate (3-3) through the through groove (3-5); The support mechanism (3) comprises a support frame (3-2), the support frame (3-2) is slidably mounted on the punching mechanism (2), the limit frame (3-1) and the support plate (3-3) are respectively arranged at two ends of the support frame (3-2), and the support frame (3-2) abuts against the side wall of the drill bit (4) through the support plate (3-3); The angle adjustment mechanism (1) is provided with a punching guide rail (1-1), the punching mechanism (2) is slidably mounted on the angle adjustment mechanism (1) via the punching guide rail (1-1), the limiting frame (3-1) is adapted to the punching guide rail (1-1), and the limiting frame (3-1) is limited by the punching guide rail (1-1).

2. A valve body shaft side hole machining tool according to claim 1, characterized in that: A spring (5) is provided between the limiting frame (3-1) and the punching mechanism (2).

3. A valve body shaft side hole machining tool according to claim 1, characterized in that: The punching mechanism (2) comprises a knife seat assembly (2-1) and a knife seat driving assembly (2-2) respectively mounted on the angle adjustment mechanism (1); the knife seat driving assembly (2-2) is connected to the knife seat assembly (2-1) to drive the knife seat assembly (2-1) to move; and the support mechanism (3) is slidably mounted on the knife seat assembly (2-1).

4. A valve body shaft side hole machining tool according to claim 3, characterized in that: The tool holder assembly (2-1) comprises a punching seat (2-3), a rotating seat (2-4) and a punching motor (2-5); the punching seat (2-3) is slidably mounted on the angle adjustment mechanism (1); the rotating seat (2-4) is rotatably mounted in the punching seat (2-3); the drill bit (4) is mounted in the rotating seat (2-4); and the punching motor (2-5) is connected to the rotating seat (2-4) to drive the punching seat (2-3) to rotate.

5. A valve body shaft side hole machining tool according to claim 4, characterized in that: The punching seat (2-3) is provided with a guide groove (2-6), and the support mechanism (3) is slidably mounted on the punching seat (2-3) via the guide groove (2-6).

6. A valve body shaft side hole machining tool according to claim 1, characterized in that: The drill bit (4) comprises a drilling portion (4-1) and a rotating shaft portion (4-2) which are connected to each other; the drilling portion (4-1) is mounted on the punching mechanism (2) via the rotating shaft portion (4-2); and the supporting mechanism (3) abuts against the outer side of the rotating shaft portion (4-2).

7. A valve body shaft side hole machining tool according to claim 1, characterized in that: The angle adjustment mechanism (1) comprises a base (1-2), an adjustment plate (1-3), an adjustment assembly (1-4) and a locking member (1-5); the punching mechanism (2) is mounted on the adjustment plate (1-3); the adjustment plate (1-3) is rotatably mounted on the base (1-2); the adjustment assembly (1-4) is connected to the adjustment plate (1-3) to drive the adjustment plate (1-3) to rotate; the locking member (1-5) is connected to the adjustment assembly (1-4) to lock the adjustment assembly (1-4) via the locking member (1-5).

8. A valve body shaft side hole machining tool according to claim 7, characterized in that: The adjustment assembly (1-4) comprises an angle adjustment motor (1-6), a guide rod (1-7) and a connecting rod (1-8); the guide rod (1-7) is slidably mounted on the base (1-2); two ends of the connecting rod (1-8) are rotatably connected to the guide rod (1-7) and the adjustment plate (1-3); the angle adjustment motor (1-6) is connected to the guide rod (1-7) via a first screw rod assembly (1-9) to drive the guide rod (1-7) to move; locking blocks (1-10) adapted to the locking member (1-5) are mounted on both ends of the guide rod (1-7).

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