A device and method for making holes in inner wall of cylinder parts

Abstract

The present application discloses a device and method for making holes in the inner wall of a cylindrical part. The device comprises a base assembly, in which a transmission assembly and an output assembly are movably arranged respectively. One end of the transmission assembly is connected to a power assembly, and the transmission assembly is used to drive the output assembly to rotate. One end of the output assembly movably extends out of the top of the base assembly and is connected to a clamping assembly, and the clamping assembly is used to clamp the cylindrical part. The device also comprises a tool, and the tool is used to extend into the cylindrical part and make holes in the inner wall of the cylindrical part. The present application has the advantages of being able to realize automatic hole making on the inner wall of the cylindrical part, reducing the difficulty of hole making, and improving the efficiency and quality of taper hole making.

Description

Technical Field

[0001] The present application relates to the technical field of hole making for cylindrical parts, and in particular to a device and method for making holes in the inner wall of a cylindrical part. Background Art

[0002] In the fields of aviation, aerospace, and shipbuilding, there are a large number of high-precision cylinder inner wall hole-making parts with large sizes and high-precision composite hole systems on the inner wall structure. Figure 1 As shown in the figure, 150 φ6H8 high-precision inner holes need to be made into 100° tapered holes on the inner wall of the cylinder. The cylinder wall is thin and the hole angle tolerance is high. Due to the high precision of the inner wall tapered holes, the large number, the high labor intensity, the thin parts are easy to deform, and the current processing technology for this type of parts has relatively low processing quality and efficiency. Summary of the invention

[0003] The main purpose of the present application is to provide a device and method for making holes in the inner wall of a cylindrical part, aiming to solve the technical problem that the existing hole making quality and efficiency of tapered holes on the inner wall of a cylindrical part are relatively low.

[0004] To achieve the above-mentioned purpose, the present application provides a device for making holes in the inner wall of a cylindrical part, including a base assembly, in which a transmission assembly and an output assembly are movably arranged respectively, one end of the transmission assembly is connected to a power assembly, and the transmission assembly is used to drive the output assembly to rotate, one end of the output assembly movably extends out of the top of the base assembly and is connected to a clamping assembly, and the clamping assembly is used to clamp the cylindrical part, and also includes a tool, which is used to extend into the cylindrical part and make holes in the inner wall of the cylindrical part.

[0005] Optionally, the transmission assembly includes a worm shaft movably connected to the base assembly, both ends of the worm shaft movably pass through the side wall of the base assembly, one end of the worm shaft is connected to the power assembly, and the output assembly includes a turbine sleeve meshingly connected to the worm shaft, the turbine sleeve movably connected to the base assembly, the turbine sleeve is connected to an output sleeve extending from the top of the base assembly, and the output sleeve is used to connect the clamping assembly.

[0006] Optionally, the clamping assembly includes a clamping sleeve detachably connected to the top of the output shaft sleeve, the cylinder part is clamped in the clamping sleeve, and a plurality of avoidance holes are opened on the inner wall of the clamping sleeve.

[0007] Optionally, a circle of internal thread cover is provided on the outer wall of the clamping sleeve, and the internal thread cover is threadedly sleeved on the top of the output shaft sleeve.

[0008] Optionally, the material of the clamping sleeve is an elastic-plastic material, and a section of the clamping sleeve located above the internal thread cover is a tightening part. The outer diameter of the tightening part decreases from bottom to top. The tightening part includes multiple clamping plates, which are connected to the top of the internal thread cover in a circular array. There is a spacing between adjacent clamping plates. A tightening mechanism is provided on the tightening part, and the tightening mechanism is used to reduce the spacing between the clamping plates.

[0009] Optionally, the tightening mechanism includes a lower locking nut, a lower braking nut, an upper locking nut and an upper braking nut which are threadedly sleeved on the outer wall of the tightening part in sequence from bottom to top.

[0010] Optionally, the base assembly includes a first box body, the top of the first box body is open, a second box body is arranged on the side wall of the first box body, the first box body and the second box body are connected to each other, the worm shaft is movably connected in the second box body, and the turbine sleeve is movably connected in the first box body.

[0011] Optionally, the base assembly further includes an upper cover plate and a plurality of connecting screws, the upper cover plate is connected to the top of the first box body via the connecting screws, and the output shaft sleeve movably extends out of the upper cover plate.

[0012] Optionally, the output assembly further includes an upper bearing and a lower bearing sleeved on the turbine sleeve, and the turbine sleeve is movably connected to the interior of the first housing via the upper bearing and the lower bearing.

[0013] Optionally, tapered holes are provided on both side walls of the second box body, and tapered bearings matching the worm shaft are provided at the tapered holes. A retaining ring located outside the tapered bearing and a support ring sleeved on the retaining ring are also provided at the tapered holes. The worm shaft moves through the retaining ring, and a stop pin penetrating the support ring and the retaining ring is provided in the second box body.

[0014] Optionally, a workbench is further included, and a positioning pin is provided on the bottom of the first box body, and the first box body is fixed to the workbench through the positioning pin.

[0015] Optionally, the power assembly includes a power box arranged on the workbench, the power box is connected to a clamping disk, the power box is used to drive the clamping disk to rotate, and the clamping disk is used to clamp one end of the worm shaft.

[0016] A hole making method, using the above-mentioned inner wall hole making device of a cylindrical part, comprises the following steps:

[0017] Install the barrel part to be processed in the clamping assembly;

[0018] Insert the tool into the barrel part and debug it;

[0019] Start the power assembly, so that the transmission assembly drives the output assembly to rotate, thereby driving the clamping assembly and the cylinder body parts to rotate as a whole to a corresponding angle;

[0020] The inner wall of the cylinder part is processed by a tool to make holes;

[0021] The cylinder part is rotated again to a corresponding angle by the power assembly, and the inner wall of the rotated cylinder part is again made holes by the tool until holes at different angles on the inner wall of the cylinder part are completed.

[0022] The beneficial effects that this application can achieve are as follows:

[0023] The present application can transmit the rotation of the power component to the clamping component through the transmission cooperation between the transmission component and the output component, so that the clamping component holding the cylindrical part rotates as a whole. When it rotates to a corresponding angle, the corresponding position of the inner wall of the cylindrical part is processed by the tool, and then the cylindrical part is rotated again, and the inner wall of the rotated cylindrical part is processed by the tool again until the holes at different angles on the inner wall of the cylindrical part are completed. During this process, the tool does not need to be rotated, thereby reducing the difficulty of hole making, realizing automatic rotation and positioning hole making on the inner wall of the cylindrical part, and improving the hole making efficiency and quality of the tapered holes on the inner wall of the cylindrical parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0025] Figure 1 It is a structural schematic diagram of the hole making process of the cylinder parts in the embodiment of the present application;

[0026] Figure 2 This is a schematic structural diagram of a device for making holes in the inner wall of a cylindrical part in an embodiment of the present application;

[0027] Figure 3 This is a schematic diagram of the exploded structure of a device for making holes on the inner wall of a cylindrical part in an embodiment of the present application (power components and workbench are omitted);

[0028] Figure 4 This is a schematic diagram of the structure when clamping a cylinder part in an embodiment of the present application;

[0029] Figure 5 This is a schematic diagram of the connection structure between the transmission assembly and the second box body in the embodiment of the present application;

[0030] Figure 6 Schematic diagram of the structure of the clamping assembly in the embodiment of the present application.

[0031] Reference numerals:

[0032] 110-base assembly, 111-first housing, 112-second housing, 113-upper cover, 114-connecting screws, 115-locating pin, 120-transmission assembly, 121-worm shaft, 122-taper bearing, 123-retaining ring, 124-support ring, 125-stop pin, 130-output assembly, 131-turbine sleeve, 132-output sleeve, 133-upper bearing, 134- Lower bearing, 135-pin, 140-power assembly, 141-power box, 142-clamping plate, 150-clamping assembly, 151-clamping sleeve, 1511-avoidance hole, 152-inner thread cover, 153-lower end locking nut, 154-lower end braking nut, 155-upper end locking nut, 156-upper end braking nut, 160-tool, 170-workbench, 180-cylinder parts.

[0033] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0036] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0038] Example 1

[0039] Reference Figure 1-Figure 6 The present embodiment provides a device for making holes on the inner wall of a cylindrical part, including a base assembly 110, in which a transmission assembly 120 and an output assembly 130 are movably arranged, one end of the transmission assembly 120 is connected to a power assembly 140, the transmission assembly 120 is used to drive the output assembly 130 to rotate, one end of the output assembly 130 is movably extended out of the top of the base assembly 110 and is connected to a clamping assembly 150, the clamping assembly 150 is used to clamp a cylindrical part 180, and also includes a tool 160, the tool 160 is used to extend into the cylindrical part 180 and make holes on the inner wall of the cylindrical part 180.

[0040] At present, the hole making process for the inner wall tapered hole of thin-walled cylindrical parts generally adopts the method of first making the hole and then manually back-pulling the tapered hole. In this process, there are many difficulties and problems that restrict the inner wall hole making processing of cylindrical parts:

[0041] (1) The hole is made first, and then the taper is manually pulled back. The secondary positioning is difficult and the resetting is difficult. The concentricity of the first hole and the taper hole cannot be guaranteed, and the parts are prone to out-of-tolerance.

[0042] (2) The depth of the tapered hole cannot be controlled during reverse drawing. The processing quality of the product depends largely on the experience of the workers, which requires a very high level of technical skills and results in poor product quality stability.

[0043] (3) There are 150 holes in the part, and the taper holes need to be made again. The taper hole cutter needs to be installed manually repeatedly. For the circular hole system, a special fixture needs to be used to change the angle after each row of axial holes is completed. The tool and fixture need to be adjusted repeatedly, and the processing time is long and the labor intensity of the workers is high.

[0044] (4) If the tool is to realize the functions of three-axis position movement and rotation, its motion path is complex and higher requirements are placed on the processing machine tool. Its implementation structure is too complicated, resulting in excessively high equipment costs.

[0045] Therefore, in this embodiment, through the transmission cooperation between the transmission component 120 and the output component 130, the rotation of the power component 140 can be transmitted to the clamping component 150, so that the clamping component 150 clamping the cylindrical part 180 rotates as a whole. When it rotates to the corresponding angle, the corresponding position of the inner wall of the cylindrical part 180 is processed by the tool 160, and then the cylindrical part 180 is rotated again, and the inner wall of the rotated cylindrical part 180 is processed again by the tool 160 until the holes at different angles on the inner wall of the cylindrical part 180 are completed. In this process, the tool 160 does not need to be rotated, but only needs to move up and down and horizontally, which simplifies the movement path of the tool 160 and does not need to repeatedly adjust the tool 160 and the fixture, thereby reducing the difficulty of hole making, improving the hole making efficiency, and reducing the equipment cost, realizing the automatic rotation and positioning hole making of the inner wall of the cylindrical part 180, avoiding human errors, ensuring dimensional accuracy, thereby improving the quality of the tapered hole on the inner wall of cylindrical parts, and no human intervention is required when using this device to make holes. The process is controllable, the labor intensity of workers is reduced, and the system has good versatility.

[0046] It should be noted that the tool 160 here can be a tool on a processing machine tool (not shown in the figure), and the power component 140 can be a rotating spindle of the machine tool. The front end of the rotating spindle drives the clamping end to clamp the transmission component 120. When making holes, the device can be assembled on the processing machine tool.

[0047] As an optional embodiment, the transmission assembly 120 includes a worm shaft 121 movably connected to the base assembly 110, both ends of the worm shaft 121 movably pass through the side wall of the base assembly 110, one end of the worm shaft 121 is connected to the power assembly 140, and the output assembly 130 includes a turbine sleeve 131 meshingly connected to the worm shaft 121, the turbine sleeve 131 is movably connected in the base assembly 110, and the turbine sleeve 131 is connected to an output sleeve 132 extending from the top of the base assembly 110, and the output sleeve 132 is used to connect the clamping assembly 150.

[0048] When making holes in the cylindrical part 180, the tool 160 on the machine tool is generally in a vertical state, so the clamping assembly 150 fixes the cylindrical part 180 in a vertical state to facilitate the tool 160 to vertically extend into the cylindrical part 180 for hole making. Since the output end of the power assembly 140 rotates horizontally, it is necessary to convert the horizontal rotational motion of the power assembly 140 into the vertical rotational motion of the clamping assembly 150. Therefore, in this embodiment, through the cooperation of the worm shaft 121 and the turbine sleeve 131, when the power assembly 140 drives the worm shaft 121 to rotate, the worm shaft 121 drives the turbine sleeve 131 to rotate, so that the output sleeve 132 drives the clamping assembly 150 to rotate around the vertical axis, and the structure is compact and reasonable. Here, the turbine sleeve 131 is a structure of a sleeve outer wall plus a circle of turbine gear ring. At the same time, the turbine sleeve 131 and the output sleeve 132 are both in the form of hollow sleeve structures, so that the lower part of the cylinder part 180 can extend into the output sleeve 132 and the turbine sleeve 13, and the clamping assembly 150 only needs to clamp the upper part of the cylinder part 180, which reduces the space occupied. The clamping installation structure is more compact and reasonable, and is more conducive to cooperation with the tool 160 when making holes.

[0049] As an optional embodiment, the clamping assembly 150 includes a clamping sleeve 151 detachably connected to the top of the output shaft sleeve 132 , the cylinder part 180 is clamped in the clamping sleeve 151 , and a plurality of avoidance holes 1511 are opened on the inner wall of the clamping sleeve 151 .

[0050] In this embodiment, the barrel part 180 is installed in the clamping sleeve 151, that is, it is fixed from the outside of the barrel part 180 to ensure that the internal space of the barrel part 180 is unobstructed. At the same time, the avoidance hole 1511 on the inner wall of the clamping sleeve 151 can cooperate with the hole position to be processed in the barrel part 180, thereby reserving space during processing.

[0051] As an optional implementation, a circle of internal thread cover 152 is provided on the outer wall of the clamping sleeve 151 , and the internal thread cover 152 is threadedly sleeved on the top of the output shaft sleeve 132 .

[0052] In this embodiment, the clamping sleeve 151 can be quickly installed by being connected with the top thread of the output shaft sleeve 132 through the internal thread cover 152, which is convenient for assembly and disassembly and quick and easy to operate.

[0053] As an optional embodiment, the material of the clamping sleeve 151 is an elastic-plastic material, and a section of the clamping sleeve 151 located above the internal thread cover 152 is a tightening portion, and the outer diameter of the tightening portion decreases from bottom to top. The tightening portion includes a plurality of clamping plates, and the clamping plates are connected to the top of the internal thread cover 152 in a circular array, and there is a spacing between adjacent clamping plates. A tightening mechanism is provided on the tightening portion, and the tightening mechanism is used to reduce the spacing between the clamping plates.

[0054] In this embodiment, since the material of the clamping sleeve 151 is an elastic-plastic material and is composed of a plurality of clamping plates with a spacing, after the cylindrical part 180 is installed in the clamping sleeve 151, a tightening mechanism is put on the outside of the clamping sleeve 151, so that the plurality of clamping plates are pressed close to the outer wall of the cylindrical part 180. The operation is convenient and quick. The outer diameter of the tightening part decreases from bottom to top, and it can be conveniently tightened at different positions outside the tightening part. It can meet the clamping and fixation of cylindrical parts 180 of various specifications. The structure is simple and universal, avoids special clamps, reduces the cost of clamp manufacturing, and improves versatility.

[0055] As an optional embodiment, the tightening mechanism includes a lower locking nut 153, a lower braking nut 154, an upper locking nut 155 and an upper braking nut 156 which are threadedly sleeved on the outer wall of the tightening part from bottom to top.

[0056] In this embodiment, when fixing, first use the lower end locking nut 153 to lock, and the lower end braking nut 154 to brake, and then use the upper end locking nut 155 to lock, and the upper end braking nut 156 to brake, so as to achieve the purpose of stable support and positioning, and the adopted threaded connection and locking structure has the advantages of simple installation and disassembly, strong operability and good maintainability.

[0057] It should be noted that the inner walls of the lower locking nut 153, the lower braking nut 154, the upper locking nut 155 and the upper braking nut 156 should also be conical to match the outer wall of the tightening part.

[0058] As an optional embodiment, the base assembly 110 includes a first box body 111, the top of the first box body 111 is open, and the side wall of the first box body 111 is provided with a second box body 112. The first box body 111 and the second box body 112 are internally communicated, the worm shaft 121 is movably connected in the second box body 112, and the turbine sleeve 131 is movably connected in the first box body 111.

[0059] In this embodiment, the first box body 111 can be cylindrical, and the second box body 112 can be square, with a compact structure. A detachable inspection cover can be provided on the side wall of the second box body 112 to facilitate opening the inspection cover for inspection and maintenance of its internal parts.

[0060] As an optional embodiment, the base assembly 110 further includes an upper cover plate 113 and a plurality of connecting screws 114 . The upper cover plate 113 is connected to the top of the first box body 111 via the connecting screws 114 , and the output shaft sleeve 132 movably extends out of the upper cover plate 113 .

[0061] In this embodiment, the base assembly 110 forms a relatively sealed structure, which can reduce the noise generated by the operation of the transmission assembly 120 and the output assembly 130, and the output assembly 130 is pressed into the first box body 111 through the upper cover plate 113, and the output shaft is fixed to the upper cover plate 113 using the connecting screws 114, without affecting the rotation of the output shaft sleeve 132. The guiding property is good, which can prevent the output shaft sleeve 132 from moving during the processing and affecting the position accuracy of the hole making on the inner wall of the cylinder, thereby affecting the part processing effect and improving the hole making quality.

[0062] As an optional implementation, the output assembly 130 further includes an upper bearing 133 and a lower bearing 134 sleeved on the turbine sleeve 131 , and the turbine sleeve 131 is movably connected to the interior of the first housing 111 via the upper bearing 133 and the lower bearing 134 .

[0063] In this embodiment, the upper bearing 133 and the lower bearing 134 support the turbine sleeve 131 and cooperate with the rotation of the turbine sleeve 131 to achieve active connection of the turbine sleeve 131 in the first housing 111 .

[0064] It should be noted that the turbine sleeve 131 and the output sleeve 132 can be fixedly connected by a pin 135 and can rotate synchronously, which is convenient for disassembly and assembly and reduces the difficulty of manufacturing.

[0065] As an optional embodiment, tapered holes are provided on both side walls of the second box body 112, and tapered bearings 122 that cooperate with the worm shaft 121 are arranged at the tapered holes. A retaining ring 123 located on the outside of the tapered bearing 122 and a support ring 124 mounted on the retaining ring 123 are also provided at the tapered holes. The worm shaft 121 can move through the retaining ring 123, and a stop pin 125 that passes through the support ring 124 and the retaining ring 123 is provided in the second box body 112.

[0066] In this embodiment, the tapered bearing 122 is used to cooperate with the rotational movement of the shafts at both ends of the worm shaft 121. The support ring 124 and the retaining ring 123 can be locked on the second box body 112 through the stop pin 125 to prevent the worm shaft 121 from moving and rotating during the processing and affecting the rotational accuracy of the inner wall hole, thereby affecting the part processing effect, thereby ensuring the processing accuracy.

[0067] As an optional embodiment, a workbench 170 is further included, and a positioning pin 115 is provided at the bottom of the first box 111, and the first box 111 is fixed to the workbench 170 through the positioning pin 115. Here, the workbench 170 is a processing machine tool workbench, and the positioning pin 11 can limit the relative position of the first box 111 and the machine tool workbench to prevent deviation caused by operation vibration.

[0068] As an optional embodiment, the power assembly 140 includes a power box 141 disposed on the workbench 170, the power box 141 is connected to a clamping plate 142, the power box 141 is used to drive the clamping plate 142 to rotate, and the clamping plate 142 is used to clamp one end of the worm shaft 121. Here, the power box 141 can be an independent motor drive device or a machine tool spindle, and the clamping plate 142 can be a three-jaw or four-jaw chuck, which can automatically clamp one end of the worm shaft 121.

[0069] Example 2

[0070] Reference Figure 1-Figure 6 This embodiment provides a hole making method, using a hole making device for the inner wall of a cylindrical part 180 described in Embodiment 1, including the following steps:

[0071] Install the barrel part 180 to be processed into the clamping assembly 150;

[0072] Insert the cutter 160 into the barrel part 180 and debug it;

[0073] The power assembly 140 is started, so that the transmission assembly 120 drives the output assembly 130 to rotate, thereby driving the clamping assembly 150 and the barrel part 180 to rotate as a whole by a corresponding angle;

[0074] The inner wall of the cylinder part 180 is processed by the tool 160;

[0075] The cylinder part 180 is rotated again by a corresponding angle by the power assembly 140 , and the inner wall of the rotated cylinder part 180 is again made holes by the tool 160 , until the inner wall of the cylinder part 180 is made holes at different angles.

[0076] In this embodiment, when performing hole making processing, it is only necessary to rotate the cylindrical part 180 by a corresponding angle each time. During this process, the tool 160 does not need to be rotated, but only needs to be moved up and down and horizontally, which simplifies the movement path of the tool 160. Therefore, there is no need to repeatedly adjust the tool 160 and the fixture, thereby reducing the difficulty of hole making, improving the hole making efficiency, and reducing the cost of machine tool equipment.

[0077] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A device for making holes on the inner wall of a cylindrical part, characterized in that: It comprises a base assembly, in which a transmission assembly and an output assembly are movably arranged respectively, one end of the transmission assembly is connected to a power assembly, the transmission assembly is used to drive the output assembly to rotate, one end of the output assembly movably extends out of the top of the base assembly and is connected to a clamping assembly, the clamping assembly is used to clamp a cylinder part, and also comprises a tool, the tool is used to extend into the cylinder part and make a hole on the inner wall of the cylinder part; The transmission assembly includes a worm shaft movably connected to the base assembly, both ends of the worm shaft movably penetrate the side wall of the base assembly, one end of the worm shaft is connected to the power assembly, and the output assembly includes a turbine sleeve meshingly connected to the worm shaft, the turbine sleeve is movably connected to the base assembly, the turbine sleeve is connected to an output sleeve extending from the top of the base assembly, and the output sleeve is used to connect the clamping assembly; The clamping assembly comprises a clamping sleeve detachably connected to the top of the output shaft sleeve, the cylinder part is clamped in the clamping sleeve, and a plurality of avoidance holes are opened on the inner wall of the clamping sleeve; a circle of internal thread cover is arranged on the outer wall of the clamping sleeve, and the internal thread cover is threadedly sleeved on the top of the output shaft sleeve; the material of the clamping sleeve is elastic-plastic material, and a section of the clamping sleeve located above the internal thread cover is a tightening part, and the outer diameter of the tightening part decreases from bottom to top, and the tightening part comprises a plurality of clamping plates, and the clamping plates are connected to the top of the internal thread cover in an annular array, and there is a spacing between adjacent clamping plates, and a tightening mechanism is sleeved on the tightening part, and the tightening mechanism is used to reduce the spacing between the clamping plates; The tightening mechanism comprises a lower end locking nut, a lower end braking nut, an upper end locking nut and an upper end braking nut which are threadedly sleeved on the outer wall of the tightening part in sequence from bottom to top.

2. A device for making holes in the inner wall of a cylindrical part according to claim 1, characterized in that: The base assembly includes a first box body, the top of the first box body is open, the side wall of the first box body is provided with a second box body, the first box body and the second box body are connected to each other, the worm shaft is movably connected in the second box body, and the turbine sleeve is movably connected in the first box body.

3. A device for making holes in the inner wall of a cylindrical part according to claim 2, characterized in that: The base assembly also includes an upper cover plate and a plurality of connecting screws. The upper cover plate is connected to the top of the first box body through the connecting screws, and the output shaft sleeve movably extends out of the upper cover plate.

4. A device for making holes in the inner wall of a cylindrical part according to claim 2, characterized in that: The output assembly further includes an upper bearing and a lower bearing sleeved on the turbine sleeve, and the turbine sleeve is movably connected to the interior of the first housing through the upper bearing and the lower bearing.

5. A device for making holes in the inner wall of a cylindrical part according to claim 2, characterized in that: Conical holes are provided on both side walls of the second housing, and conical bearings cooperating with the worm shaft are arranged at the conical holes. A retaining ring located outside the conical bearing and a supporting ring sleeved on the retaining ring are also arranged at the conical holes, and the worm shaft moves through the retaining ring. A stop pin penetrating the support ring and the retaining ring is arranged in the second housing.

6. A device for making holes in the inner wall of a cylindrical part according to claim 2, characterized in that: It also includes a workbench, and a positioning pin is arranged at the bottom of the first box body, and the first box body is fixed on the workbench through the positioning pin.

7. A device for making holes in the inner wall of a cylindrical part according to claim 6, characterized in that: The power assembly comprises a power box arranged on the workbench, the power box is connected with a clamping disk, the power box is used to drive the clamping disk to rotate, and the clamping disk is used to clamp one end of the worm shaft.

8. A hole making method, characterized in that: The device for making holes on the inner wall of a cylindrical part according to any one of claims 1 to 7 comprises the following steps: Installing the barrel part to be processed in the clamping assembly; Insert the tool into the barrel part and debug it; Start the power assembly, so that the transmission assembly drives the output assembly to rotate, thereby driving the clamping assembly and the barrel part to rotate as a whole by a corresponding angle; Performing hole making processing on the inner wall of the cylinder part by using the tool; The power assembly is used to rotate the barrel part to a corresponding angle again, and the tool is used to make holes in the inner wall of the rotated barrel part again, until holes are made at different angles on the inner wall of the barrel part.

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