Fixing tool for cylindrical part drilling

Abstract

The utility model relates to the technical field of fixing tools, and provides a cylindrical part drilling fixing tool which comprises a frame body. The fixing cylinder is rotationally arranged on the frame body, the fixing cylinder is provided with a part fixing cavity, and the part fixing cavity is provided with a first drilling hole and a second drilling hole; and the positioning piece is movably arranged on the frame body, the positioning piece abuts against or cancels abutting against the fixing barrel after moving, and the positioning piece is used for limiting rotation of the fixing barrel. By means of the technical scheme, the problem that in the prior art, a traditional fixing tool cannot adapt to the scene that high-precision punching is conducted on different positions of a cylindrical part, and consequently the part needs to be disassembled and assembled repeatedly is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fixed tooling, in particular to a fixed tooling for drilling holes in cylindrical parts. Background Art

[0002] For the drilling operation of cylindrical parts, the selection and design of fixed tooling is very important, which will directly affect the accuracy and efficiency of drilling. It is crucial to ensure the stability of the parts during the drilling process and the accuracy of the position to achieve the required processing accuracy.

[0003] Traditional fixed tooling can only fix cylindrical parts at a certain angle. Each time a hole is drilled at a different position, the cylindrical part needs to be removed in advance and then installed at the appropriate position. The same is true for different drilling specifications. That is, for different positions of cylindrical parts, high-precision drilling of holes of different specifications requires repeated disassembly and installation of parts, which greatly increases the difficulty of operation and is prone to safety accidents. Utility Model Content

[0004] The utility model provides a fixed tool for drilling cylindrical parts, which solves the problem in the related art that traditional fixed tool cannot adapt to the scenario of high-precision drilling of different positions of cylindrical parts, resulting in the need to repeatedly disassemble and assemble parts.

[0005] The technical solution of the utility model is as follows:

[0006] Fixture for drilling holes in cylindrical parts, including:

[0007] Frame;

[0008] A fixing cylinder, the fixing cylinder is rotatably disposed on the frame, the fixing cylinder has a part fixing cavity, and the part fixing cavity has a first borehole and a second borehole;

[0009] A positioning member is movably arranged on the frame, and after the positioning member moves, the positioning member abuts against or cancels the abutment against the fixed tube, and the positioning member is used to limit the rotation of the fixed tube.

[0010] As a further technical solution, the fixing tube includes:

[0011] A fixing sleeve and a fixing cover, the fixing tube and the fixing sleeve are both rotatably arranged on the frame body, the two are coaxially arranged, the fixing sleeve and the fixing cover are detachably connected, and the part fixing cavity is formed between the fixing sleeve and the fixing cover.

[0012] As a further technical solution, the fixing sleeve has the first borehole and the second borehole, the first borehole and the second borehole are both in plurality, and the plurality of the first boreholes and the plurality of the second boreholes are arranged circumferentially.

[0013] As a further technical solution, the fixing cover is detachably arranged at one end of the fixing sleeve, and the fixing sleeve has a quick-release hole at one end close to the fixing cover.

[0014] As a further technical solution, the fixing sleeve is cylindrical, the fixing cover has a first through hole, the first through hole is connected to the part fixing cavity, and further includes:

[0015] A support shaft is arranged on the fixing sleeve, the axial direction of the support shaft is coaxial with the rotational axial direction of the fixing sleeve, and the support shaft passes through the first through hole.

[0016] As a further technical solution, the fixing sleeve has a positioning hole at one end away from the fixing cover, and the positioning member extends into or out of the positioning hole after moving.

[0017] As a further technical solution, the frame is U-shaped, both ends of the frame have shaft grooves, the fixed cylinder is located between the two shaft grooves, and both ends of the fixed cylinder are rotatably disposed in the two shaft grooves.

[0018] As a further technical solution, the frame body further has a second through hole at one end close to the positioning hole, and the positioning member passes through the second through hole, and further comprises:

[0019] A lever, wherein the lever is swingably arranged on one end of the frame body close to the positioning hole, and the positioning member is fixedly connected to one end of the lever;

[0020] An elastic member, one end of which is connected to the frame body, and the other end of which is connected to the other end of the lever, and the elastic member provides a force for the positioning member to extend into the positioning hole.

[0021] As a further technical solution, it also includes:

[0022] A limit block, the limit block is rotatably arranged on one end of the frame close to the positioning hole, the limit block has a through slot, wherein the positioning member extends out of the positioning hole, and after the limit block is rotated, the positioning member extends into or out of the through slot, and the end of the lever close to the positioning member abuts or cancels the abutment against the limit block, and the limit block is used to keep the positioning member in a state of extending out of the positioning hole.

[0023] As a further technical solution, the rotation axis of the limit block is parallel to the rotation axis of the fixing sleeve, one side of the limit block abuts against the frame, and the rotation axis of the lever is perpendicular to the rotation axis of the fixing sleeve.

[0024] The working principle and beneficial effects of the utility model are:

[0025] In the utility model, in order to solve the problems brought by traditional fixed tooling, it is convenient to change the processing position, thereby saving operation steps and ensuring the drilling accuracy of cylindrical parts. Firstly, the part fixing cavity of the fixing cylinder is used to accurately accommodate the cylindrical part therein to ensure that the position of the part is fixed during the drilling process. The design of the first drilling hole and the second drilling hole provides accurate guidance for the drill bit, ensures the accuracy of the drilling position, avoids drilling deviation, and improves the processing accuracy.

[0026] When using different drilling machines to process parts through the first drilling hole or the second drilling hole, the overall position of the fixed cylinder needs to be determined, so a positioning piece is set to stabilize the fixing piece through its movement to avoid shaking of the parts during the drilling process and ensure the verticality of the drilling hole and the uniformity of the hole diameter.

[0027] The tooling can set various specifications and positions of drilling holes on the fixed cylinder in advance to meet the requirements of different processing conditions. The operator can change the drilling position by rotating the fixed cylinder without moving the parts, which greatly improves the efficiency of multi-hole processing. At the same time, the rapid locking and unlocking of the positioning parts reduces the processing preparation time and improves the overall processing speed and practicality.

[0028] The design of fixing the parts in the part fixing cavity is, on the one hand, to improve the processing accuracy and quickly determine the position of the processing hole without the need for manual re-alignment of the drill bit and the part; on the other hand, the drilling process does not require any human intervention at all. The cylindrical parts are installed in the fixed cylinder, which greatly improves the overall safety. The overall positioning and fixing mechanism is clear, and it is easy to integrate with various processing equipment such as drilling machines and CNC machine tools, which provides convenience for realizing automated or semi-automated processing and improves the compatibility and production efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0030] Figure 1 This is a schematic diagram of the structure of the fixed tooling for drilling cylindrical parts in the utility model from the first perspective;

[0031] Figure 2 This is a schematic diagram of the structure of the fixed cylinder in the utility model;

[0032] Figure 3 This is a schematic diagram of the matching structure of the frame and the fixing sleeve in the utility model;

[0033] Figure 4 This is a schematic diagram of the matching structure of the frame and the fixed cover in the utility model;

[0034] Figure 5This is a schematic diagram of the frame structure of the utility model;

[0035] Figure 6 For this utility model Figure 5 Enlarged view of part A in the middle;

[0036] Figure 7 This is a schematic structural diagram from a second perspective of the fixed tooling for drilling holes in cylindrical parts in the utility model.

[0037] In the figure: 1, frame, 101, shaft groove, 102, second through hole, 2, fixing cylinder, 201, part fixing cavity, 202, first drill hole, 203, second drill hole, 204, fixing sleeve, 205, fixing cover, 206, quick release hole, 207, first through hole, 208, positioning hole, 3, positioning member, 4, supporting shaft, 5, lever, 6, elastic member, 7, limit block, 701, through groove. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0039] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0040] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0041] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] Reference Figure 1 to Figure 7, which is the first embodiment of the utility model, proposes a fixed tool for drilling cylindrical parts, including: a frame 1; a fixed cylinder 2, the fixed cylinder 2 is rotatably set on the frame 1, the fixed cylinder 2 has a part fixing cavity 201, the part fixing cavity 201 has a first drilling hole 202 and a second drilling hole 203; a positioning member 3, the positioning member 3 is movably set on the frame 1, and the positioning member 3 abuts or cancels the abutment with the fixed cylinder 2 after moving, and the positioning member 3 is used to limit the rotation of the fixed cylinder 2.

[0043] In this embodiment, Figure 1 As shown, in order to solve the problems caused by traditional fixed tooling, facilitate the change of processing position, thereby saving operation steps and ensuring the drilling accuracy of cylindrical parts, firstly, the part fixing cavity 201 of the fixing cylinder 204 is used to accurately accommodate the cylindrical part therein to ensure that the position of the part is fixed during the drilling process. The design of the first drill hole 202 and the second drill hole 203 provides accurate guidance for the drill bit, ensures the accuracy of the drilling position, avoids drilling deviation, and improves the processing accuracy.

[0044] When using different drilling machines to process the parts through the first borehole 202 or the second borehole 203, the overall position of the fixed cylinder 204 needs to be determined, so a positioning member 3 is provided to stabilize the fixing member through its movement to avoid the shaking of the parts during the drilling process, thereby ensuring the verticality of the drilled hole and the uniformity of the hole diameter.

[0045] The tooling can set various specifications and positions of drilling holes on the fixed cylinder 204 in advance to meet the requirements of different processing conditions, and the operator can change the drilling position by rotating the fixed cylinder 204 without moving the parts, which greatly improves the efficiency of multi-hole processing. At the same time, the rapid locking and unlocking of the positioning member 3 reduces the processing preparation time and improves the overall processing speed and practicality.

[0046] The design of fixing the parts in the part fixing cavity 201 is, on the one hand, to improve the processing accuracy and quickly determine the position of the processing hole without the need for manual re-alignment of the drill bit and the part; on the other hand, the drilling process does not require any human intervention at all. The cylindrical parts are installed in the fixing tube 204, which greatly improves the overall safety. The overall positioning and fixing mechanism is clear, and it is easy to integrate with various processing equipment such as drilling machines and CNC machine tools, which provides convenience for realizing automated or semi-automated processing and improves the compatibility and production efficiency of the equipment.

[0047] Furthermore, the fixed cylinder 2 includes: a fixed sleeve 204 and a fixed cover 205. The fixed cylinder 2 and the fixed sleeve 204 are both rotatably set on the frame 1. The two are coaxially set. The fixed sleeve 204 and the fixed cover 205 are detachably connected, and a part fixing cavity 201 is formed between the fixed sleeve 204 and the fixed cover 205.

[0048] In this embodiment, Figures 2~4 As shown, in order to facilitate the installation of the cylindrical parts in the fixed cylinder 204 in the early stage, the fixed cylinder 204 is designed to be a split structure, consisting of a cylindrical fixed sleeve and a cylindrical fixed cover 205. The fixed cover 205 can be detachably connected with the fixed sleeve through mechanical structures such as a sealing ring or an interference fit. After the cylindrical part is accurately placed in the fixed sleeve, the fixed cover 205 is covered, and the fixed cylinder 204 is then installed on the frame 1 and rotated to a suitable position, and then the rotation is restricted by the positioning member 3. Specifically, since the part is cylindrical, the fixed sleeve and the fixed cover 205 are both designed to be cylindrical. Similarly, for parts of other shapes, the shape of the fixed cylinder 204 can also be changed.

[0049] Furthermore, the cylindrical part is in the fixed sleeve and rotates with it. To ensure stable rotation and avoid eccentric rotation and interference with the drill bit or other components, the cylindrical part, the fixed sleeve and the fixed cover 205 are all coaxially arranged to ensure the integrity of the three during processing to ensure processing accuracy.

[0050] Furthermore, the fixing sleeve 204 has a first bore hole 202 and a second bore hole 203 , and there are a plurality of the first bore holes 202 and the second bore holes 203 , and the plurality of the first bore holes 202 and the plurality of the second bore holes 203 are arranged circumferentially.

[0051] In this embodiment, Figure 2 , 3 As shown, the fixed cover 205 is smaller than the fixed sleeve and cannot accommodate boreholes of different specifications. Therefore, a plurality of groups of first boreholes 202 and second boreholes 203 are arranged on the fixed sleeve and arranged in a circle to adapt to the rotating fixed sleeve, so as to ensure that the drill bit corresponds to the first borehole 202 or the second borehole 203 at different positions. The first borehole 202 and the second borehole 203 must meet the conditions of different specifications, that is, different diameters, to increase the scope of application. The boreholes are usually circular.

[0052] Furthermore, the fixing cover 205 is detachably disposed at one end of the fixing sleeve 204 , and the fixing sleeve 204 has a quick-release hole 206 at one end close to the fixing cover 205 .

[0053] In this embodiment, Figures 1 to 3 As shown, the fixed cover 205 is detachable in an interference fit with the opening at one end of the fixed sleeve. In order to avoid the inconvenience of disassembling the two later, a quick-release hole 206 is opened at the end of the fixed sleeve close to the fixed cover 205, that is, the end where the cylindrical part is placed. The quick-release hole 206 has various forms, such as semicircular, square and triangular, to ensure that the worker's fingers can be directly inserted into the quick-release hole 206 to quickly remove the fixed cover 205, thereby improving the convenience of using the fixing tool.

[0054] Furthermore, the fixing sleeve 204 is cylindrical, the fixing cover 205 has a first through hole 207, the first through hole 207 is connected to the part fixing cavity 201, and also includes: a support shaft 4, the support shaft 4 is arranged on the fixing sleeve 204, the axial direction of the support shaft 4 is coaxial with the rotational axis of the fixing sleeve 204, and the support shaft 4 passes through the first through hole 207.

[0055] In this embodiment, Figures 2~4 As shown, the support shaft 4 is set at the center position of the fixed sleeve and is coaxial with its rotation axis, so that the cylindrical part can be more accurately mounted on the support shaft 4, ensuring that the fixed cylinder 204 and the cylindrical part are a whole when rotating, maintaining the stable rotation of the fixed cylinder 204, and the support shaft 4 can withstand the radial force and axial force during the drilling process, avoiding the displacement of parts caused by external forces, and enhancing the stability and safety of the drilling process.

[0056] The support shaft 4 passes through the first through hole 207 of the fixed cover 205, which further improves the matching stability between the fixed cylinder 204 and the fixed cover 205. The operator can easily open the fixed cover 205 to place or remove parts, which reduces the difficulty of operation and improves work efficiency.

[0057] Furthermore, the fixing sleeve 204 has a positioning hole 208 at one end away from the fixing cover 205 , and the positioning member 3 extends into or out of the positioning hole 208 after moving.

[0058] In this embodiment, Figure 1 , 5 As shown in Figure 7, a simple positioning member 3 structure is used to save costs and can easily limit the rotation of the fixed cylinder 204. Specifically, a positioning hole 208 is opened at the end of the fixed sleeve away from the fixed cover 205 using a principle similar to a pin shaft. The positioning member 3 similar to a pin shaft moves on the fixed frame 1 and extends into the positioning hole 208. Under the support of the frame 1, the rotation of the fixed cylinder 204 can be limited. The positioning member 3 can also be a cylindrical, regular polygonal or other structural shapes that can smoothly extend into the positioning hole 208.

[0059] Furthermore, the frame body 1 is U-shaped, and both ends of the frame body 1 have a shaft groove 101 . The fixing cylinder 2 is located between the two shaft grooves 101 , and both ends of the fixing cylinder 2 are rotatably disposed in the two shaft grooves 101 .

[0060] In this embodiment, Figure 5As shown, after the cylindrical parts are installed, during the installation process of the frame 1 and the fixed cylinder 204, in order to save workers' operations, ensure normal functions and save costs, the frame 1 is set to be U-shaped, and its two ends have shaft grooves 101 for supporting the rotation of the two ends of the fixed cylinder 204, that is, one supports the rotation of the fixed sleeve, and the other supports the rotation of the fixed cover 205. The use of the shaft grooves 101 can directly place the fixed cylinder 204 on the frame 1. In other words, align the two ends of the fixed cylinder 204 with the shaft grooves 101, and the fixed cylinder 204 is located between the two shaft grooves 101, so that the entire frame 1 provides stable support for the fixed cylinder 204 without affecting its rotation or the drilling process in the fixed position.

[0061] Furthermore, the frame body 1 has a second through hole 102 at one end near the positioning hole 208, and the positioning member 3 passes through the second through hole 102, and also includes: a lever 5, which is swingably set on the end of the frame body 1 near the positioning hole 208, and the positioning member 3 is fixedly connected to one end of the lever 5; an elastic member 6, one end of the elastic member 6 is connected to the frame body 1, and the other end is connected to the other end of the lever 5, and the elastic member 6 provides a force for the positioning member 3 to extend into the positioning hole 208.

[0062] In this embodiment, Figures 5 to 7 As shown, the positioning member 3 is used to limit the rotation angle of the fixing cylinder 204, and other structures are still required to fix the positioning member 3 to avoid that the positioning member 3 has no measures and is easily subjected to the reaction force of the fixing cylinder 204 during the drilling process, which may cause an accident. Therefore, the linkage design of the lever 5 and the positioning member 3 is utilized, and the positioning member 3 is welded to one end of the lever 5 through the second through hole 102 of the frame 1. The positioning member 3 can be quickly extended and withdrawn through a simple swinging action, which greatly improves the positioning and fixing speed of the parts. The elastic member 6 is further introduced to provide the positioning member 3 with the force required to extend into the positioning hole 208, so that the operator does not need to apply too much force when locking the parts, thereby reducing the operating intensity and the labor burden. At the same time, it can withstand the reaction force or vibration force of the fixing cylinder 2042 on the positioning member 3 and the lever 5 during a part of the drilling process, thereby improving safety.

[0063] Normally, under the action of the elastic member 6, the positioning member 3 is always in the state of extending into the positioning hole 208. When the punching position is changed or the internal parts are disassembled, it is necessary to rotate the fixing cylinder 2042 or remove the fixing cylinder 2042 and take it away from the frame 1. When the two move relative to each other, the elastic member 6 can be compressed with the help of external force. Under the principle of the lever 5, the positioning member 3 can extend out of the positioning hole 208 for subsequent operations. This simple structure enhances the adaptability and flexibility of the tooling, and is also convenient for operators to carry out daily inspection and maintenance, ensuring the long-term stable operation of the tooling.

[0064] Furthermore, it also includes: a limit block 7, which is rotatably arranged on one end of the frame 1 close to the positioning hole 208, and the limit block 7 has a through groove 701, wherein the positioning member 3 extends out of the positioning hole 208, and after the limit block 7 is rotated, the positioning member 3 extends into or out of the through groove 701, and the end of the lever 5 close to the positioning member 3 abuts against or cancels the abutment against the limit block 7, and the limit block 7 is used to keep the positioning member 3 in a state of extending out of the positioning hole 208.

[0065] In this embodiment, Figure 1 , 5 As shown in Figure 7, the design of the limit block 7, through cooperation with the positioning member 3, can keep the positioning member 3 in the extended state by rotating the limit block 7 after the positioning member 3 extends out of the positioning hole 208, ensuring that the fixing cylinder 2042 can be stably rotated in the shaft groove 101, or detached from the frame 1, without the need for workers to continuously apply external force to the elastic member 6. The operator only needs to rotate the limit block 7 to achieve stable locking or quick release of the positioning member 3, thereby reducing the operating steps and improving the convenience and efficiency of the operation.

[0066] Specifically, the positioning member 3 extends out of the positioning hole 208, and after the limit block 7 rotates, the positioning member 3 extends into the through groove 701, that is, the limiting member as a whole is clamped between the frame 1 and one end of the lever 5. Even if the force applied by the elastic member 6 is greater, the limit block 7 will not be squeezed away, because one side of the limiting member as a whole is in contact with the frame 1, and what is clamped is the limit block 7 as a whole, thus keeping the positioning member 3 in an extended state, which is convenient for workers to perform subsequent operations.

[0067] Furthermore, the rotation axis of the limit block 7 is parallel to the rotation axis of the fixing sleeve 204 , one side of the limit block 7 abuts against the frame body 1 , and the rotation axis of the lever 5 is perpendicular to the rotation axis of the fixing sleeve 204 .

[0068] In this embodiment, Figure 1 , 5 As shown in ~7, the rotation axis of the limit block 7 is parallel to the rotation axis of the fixed sleeve, and the rotation axis of the lever 5 is perpendicular to the rotation axis of the fixed sleeve, so as to ensure that each action is stably implemented and the required action purpose is achieved, and the structure operates more reasonably.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A fixed tool for drilling cylindrical parts, characterized in that: include: Frame (1); A fixed cylinder (2), the fixed cylinder (2) being rotatably disposed on the frame (1), the fixed cylinder (2) having a part fixing cavity (201), the part fixing cavity (201) having a first bore hole (202) and a second bore hole (203); A positioning member (3), the positioning member (3) being movably arranged on the frame (1), the positioning member (3) abutting against or canceling the abutment against the fixed cylinder (2) after movement, the positioning member (3) being used to limit the rotation of the fixed cylinder (2).

2. The fixing tool for drilling cylindrical parts according to claim 1, characterized in that: The fixing cylinder (2) comprises: A fixing sleeve (204) and a fixing cover (205), wherein the fixing cylinder (2) and the fixing sleeve (204) are both rotatably arranged on the frame (1), and the two are arranged coaxially, the fixing sleeve (204) and the fixing cover (205) are detachably connected, and the part fixing cavity (201) is formed between the fixing sleeve (204) and the fixing cover (205).

3. The fixing tool for drilling cylindrical parts according to claim 2, characterized in that: The fixing sleeve (204) has the first bore hole (202) and the second bore hole (203), the first bore hole (202) and the second bore hole (203) are both multiple, and the multiple first bore holes (202) and the multiple second bore holes (203) are all arranged in a circle.

4. The fixing tool for drilling cylindrical parts according to claim 2, characterized in that: The fixing cover (205) is detachably arranged at one end of the fixing sleeve (204), and the fixing sleeve (204) has a quick-release hole (206) at one end close to the fixing cover (205).

5. The fixing tool for drilling cylindrical parts according to claim 2, characterized in that: The fixing sleeve (204) is cylindrical, the fixing cover (205) has a first through hole (207), the first through hole (207) is connected to the part fixing cavity (201), and further comprises: A support shaft (4), the support shaft (4) being arranged on the fixing sleeve (204), the axial direction of the support shaft (4) being coaxial with the rotational axis of the fixing sleeve (204), and the support shaft (4) passing through the first through hole (207).

6. The fixing tool for drilling cylindrical parts according to claim 2, characterized in that: The fixing sleeve (204) has a positioning hole (208) at one end away from the fixing cover (205), and the positioning member (3) extends into or out of the positioning hole (208) after movement.

7. The fixing tool for drilling cylindrical parts according to claim 6, characterized in that: The frame body (1) is U-shaped, and both ends of the frame body (1) are provided with a rotating shaft groove (101), the fixed cylinder (2) is located between the two rotating shaft grooves (101), and the two ends of the fixed cylinder (2) are rotatably arranged in the two rotating shaft grooves (101) respectively.

8. The fixing tool for drilling cylindrical parts according to claim 7, characterized in that: The frame (1) further comprises a second through hole (102) at one end close to the positioning hole (208), the positioning member (3) passing through the second through hole (102), and further comprising: A lever (5), the lever (5) being swingably disposed on one end of the frame (1) close to the positioning hole (208), the positioning member (3) being fixedly connected to one end of the lever (5); An elastic member (6), one end of the elastic member (6) being connected to the frame (1) and the other end being connected to the other end of the lever (5), the elastic member (6) providing a force for the positioning member (3) to extend into the positioning hole (208).

9. The fixing tool for drilling cylindrical parts according to claim 8, characterized in that: Also includes: A limit block (7), the limit block (7) being rotatably arranged on one end of the frame (1) close to the positioning hole (208), the limit block (7) having a through slot (701), wherein the positioning member (3) extends out of the positioning hole (208), and after the limit block (7) is rotated, the positioning member (3) extends into or out of the through slot (701), and the end of the lever (5) close to the positioning member (3) abuts against or cancels the abutment against the limit block (7), and the limit block (7) is used to keep the positioning member (3) in a state of extending out of the positioning hole (208).

10. The fixing tool for drilling cylindrical parts according to claim 9, characterized in that: The rotation axis of the limit block (7) is parallel to the rotation axis of the fixing sleeve (204); one side of the limit block (7) abuts against the frame body (1); and the rotation axis of the lever (5) is perpendicular to the rotation axis of the fixing sleeve (204).

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