Drilling clamp with angular positioning function

Abstract

The drilling clamp comprises a bottom plate, a four-axis rotary table is installed on one side of the top of the bottom plate, a rotary disc is installed at the power output end of the four-axis rotary table, an assembling mechanism is installed on the rotary disc in a locking mode, a clamping mechanism is installed in the assembling mechanism, and an auxiliary mechanism is installed on the periphery of the outer side of the clamping mechanism. A supporting frame is installed at the top of the bottom plate, pre-pressing mechanisms are installed on the two sides of the top of the supporting frame, a lifting air cylinder is installed at the bottom of the supporting frame, and the power output end of the lifting air cylinder is connected with an airtightness detection mechanism. According to the fixture, the gearbox part shell can be accurately and stably clamped and fixed, and after clamping, the angular posture of the gearbox part shell can be guaranteed, so that an accurate angular positioning reference is obtained when all holes in the periphery are machined, the positions of the machined holes can be aligned when the holes in the periphery are machined, and the machining efficiency is improved. The machining error rate of the gearbox part shell is reduced, and the production efficiency of the gearbox part shell is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of clamps, and in particular relates to a drilling clamp with angular positioning. Background Art

[0002] The gearbox is a mechanism used to change the speed and torque from the engine. It can fix or change the transmission ratio of the output shaft and the input shaft in stages. During the production of the gearbox, different raw materials need to be operated through a variety of processes to obtain the required parts, and finally the parts are assembled to get the gearbox we need.

[0003] like Figure 1 , Figure 2 and Figure 3 As shown, in the process of manufacturing the gearbox part housing 101, it is necessary to drill holes on the gearbox part housing 101. However, since four positioning grooves 102 are arranged inside the large end of the gearbox part housing 101 and airtight detection teeth 103 and JY marks 104 are arranged outside the small end, the gearbox part housing 101 needs to be positioned and clamped when drilling. However, after the current drilling fixture clamps the gearbox part housing 101, there is no accurate angular positioning reference when processing the surrounding holes. When processing the surrounding holes, the position of the processing holes cannot be found, which leads to processing errors and reduces the production efficiency of the gearbox part housing 101. Therefore, a drilling fixture with angular positioning is urgently needed to solve the above problems. Summary of the invention

[0004] In view of the problems raised by the above background technology, the purpose of the present invention is to provide a drilling fixture with angular positioning.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0006] A drilling fixture with angular positioning comprises a base plate, a four-axis turntable is installed on one side of the top of the base plate, a rotating disk is installed on the power output end of the four-axis turntable, an assembly mechanism is locked on the rotating disk, a clamping mechanism is installed in the assembly mechanism, an auxiliary mechanism is installed on the outer circumference of the clamping mechanism, a support frame is installed on the top of the base plate, pre-pressing mechanisms are installed on both sides of the top of the support frame, a lifting cylinder is installed on the bottom of the support frame, and an airtightness detection mechanism is connected to the power output end of the lifting cylinder.

[0007] It is further defined that the assembly mechanism includes an assembly base, the assembly base is connected to an assembly seat, a floating seat is slidably connected in the assembly seat, an air circuit is provided in the assembly base, the output end of the air circuit is arranged on the left side of the floating seat, a thin mold expansion sleeve is installed on the outer side of the assembly seat, the thin mold expansion sleeve includes a fixed plate, the fixed plate is provided with a plurality of elastic chucks, a plurality of elastic chucks are provided with a clearance groove, the movable end of the elastic chuck is in contact with the output end of the floating seat, a sealing assembly groove is provided in the center of the assembly base, the assembly seat and the floating seat, an air avoidance groove is provided in the center of the thin mold expansion sleeve, one side of the clamping mechanism passes through the air avoidance groove, and is installed in the sealing assembly groove. Such a structural design facilitates the clamping and assembly of the large end of the gearbox part housing.

[0008] It is further defined that a pre-positioning mark is installed on one side of the top of the assembly seat by screw locking, and the end of the pre-positioning mark is arranged in a triangular structure. Such a structural design is convenient for indicating the JY mark.

[0009] It is further defined that the assembly seat is provided with four groups of positioning columns, the angles between the four groups of positioning columns are 90°, and the elastic chuck is provided with gaps corresponding to the positioning columns. Such a structural design is convenient for corresponding to the four positioning grooves provided inside the large end and for installation.

[0010] It is further defined that the positioning column is provided with an airflow hole, and the airflow hole is externally connected to an airflow sensor. Such a structural design is subjected to airtightness detection after being connected and installed with the gearbox part housing, thereby achieving verification of the angular posture of the gearbox part housing.

[0011] It is further defined that the clamping mechanism includes a clamping seat, one side of the clamping seat is installed in the sealing assembly groove, an oil cylinder is installed in the clamping seat, the power output end of the oil cylinder is connected to a core shaft, a clamping head is installed on the outer side of the core shaft, the outer surface of the clamping head is arranged in an inclined structure, an elastic expansion sleeve is installed on the outer side of the clamping seat, the core shaft and the clamping head are slidably arranged in the elastic expansion sleeve, the elastic expansion sleeve includes a mounting sleeve, a plurality of spring sheets are installed on the mounting sleeve, a gap groove is arranged between the plurality of spring sheets, and an expansion head is installed on the other side of the spring sheet. Such a structural design facilitates the clamping and assembly of the small end of the gearbox part housing.

[0012] It is further defined that the auxiliary mechanism includes auxiliary oil cylinders, the auxiliary oil cylinders are evenly arranged on the clamping seat, and the power output end of the auxiliary oil cylinder is connected to an auxiliary push rod. Such a structural design plays an auxiliary supporting effect on the inside of the gearbox part housing.

[0013] It is further defined that the pre-stressing mechanism includes a pre-stressing cylinder, a pre-stressing rod is hinged at the power output end of the pre-stressing cylinder, the pre-stressing rod is connected to a hinge seat, and the hinge seat is installed on the pre-stressing cylinder. Such a structural design has a pre-stressing effect, preventing sliding before clamping, causing the angular posture of the gearbox part housing to change.

[0014] It is further defined that the airtight detection mechanism includes a detection box, a detection rod is slidably installed in the detection box, a detection head is installed on the top of the detection rod, a limit plate is installed on the bottom of the detection rod, a spring is installed on the bottom of the limit plate, and an airflow detection hole is also provided on one side of the detection box, the input end of the airflow detection hole is arranged on the upper side of the limit plate, and the output end of the airflow detection hole is externally connected to an airflow sensor. Such a structural design further detects the airtight detection teeth at the small end of the gearbox part housing, thereby ensuring the overall angular posture of the gearbox part housing.

[0015] The beneficial effects of the present invention are as follows: the present invention can accurately and stably clamp and fix the gearbox part housing by arranging an assembly mechanism, a clamping mechanism, an auxiliary mechanism, a pre-pressing mechanism, a lifting cylinder and an airtightness detection mechanism, and after clamping, the angular posture of the gearbox part housing can be guaranteed, so that an accurate angular positioning reference is provided when processing the peripheral holes, so that the position of the processing holes can be found when processing the peripheral holes, thereby reducing the processing error rate of the gearbox part housing and improving the production efficiency of the gearbox part housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0017] Figure 1 It is a schematic diagram of the front structure of the gearbox parts housing;

[0018] Figure 2 It is a schematic diagram of the back structure of the gearbox parts housing;

[0019] Figure 3 It is a schematic diagram of the shaft side structure of the gearbox parts housing;

[0020] Figure 4 This is a schematic diagram of the axial structure of a drilling fixture with angular positioning according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of a structure of a gearbox part housing clamped by a drilling fixture with angular positioning according to an embodiment of the present invention;

[0022] Figure 6 It is a schematic cross-sectional structure diagram of a drilling fixture with angular positioning according to an embodiment of the present invention;

[0023] Figure 7It is a schematic cross-sectional structure diagram of an airtightness detection mechanism of a drilling fixture with angular positioning according to an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the enlarged structure of position A of a drilling fixture with angular positioning according to an embodiment of the present invention;

[0025] Fig. 9 This is a schematic diagram of the enlarged structure of position B of a drilling fixture with angular positioning according to an embodiment of the present invention;

[0026] Fig.10 This is a schematic diagram of the axial side structure of a thin mold expansion sleeve with an angularly positioned drilling fixture according to an embodiment of the present invention;

[0027] Fig.11 This is a schematic diagram of the axial side structure of an elastic expansion sleeve of a drilling fixture with angular positioning according to an embodiment of the present invention;

[0028] The main component symbols are described as follows:

[0029] Gearbox parts housing 101, positioning groove 102, airtight detection teeth 103, JY logo 104;

[0030] Bottom plate 1, four-axis turntable 2, rotating disk 3, assembly mechanism 4, clamping mechanism 5, auxiliary mechanism 6, support frame 7, pre-pressing mechanism 8, lifting cylinder 9, airtight detection mechanism 10, assembly base 11, assembly seat 12, floating seat 13, thin mold expansion sleeve 14, fixed plate 15, elastic clamping head 16, make way groove 17, sealing assembly groove 18, air avoidance groove 19, pre-positioning mark 20, positioning column 21, air avoidance gap 22, clamping seat 23, oil cylinder 24, mandrel 25, clamping head 26, elastic expansion sleeve 27, installation sleeve 28, spring 29, gap groove 30, expansion head 31, auxiliary oil cylinder 32, auxiliary push rod 33, pre-pressing cylinder 34, pre-pressing rod 35, hinged seat 36, detection box 37, detection rod 38, detection head 39, limit plate 40, spring 41, air flow detection hole 42, air flow hole 43. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0032] Embodiment 1, as Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, a drilling fixture with angular positioning is provided, wherein a four-axis turntable 2 is installed on one side of the top of a base plate 1, a rotating disk 3 is installed on the power output end of the four-axis turntable 2, an assembly mechanism 4 is locked and installed on the rotating disk 3, a clamping mechanism 5 is installed in the assembly mechanism 4, an auxiliary mechanism 6 is installed on the outer circumference of the clamping mechanism 5, a support frame 7 is installed on the top of the base plate 1, pre-pressing mechanisms 8 are installed on both sides of the top of the support frame 7, a lifting cylinder 9 is installed on the bottom of the support frame 7, and an airtightness detection mechanism 10 is connected to the power output end of the lifting cylinder 9.

[0033] In this embodiment, the four positioning grooves 102 inside the large end of the gearbox part housing 101 are aligned with the assembly mechanism 4, and the gearbox part housing 101 is installed on the assembly mechanism 4 and the clamping mechanism 5, and the JY mark 104 on the gearbox part housing 101 is aligned with the assembly mechanism 4, and then the pre-pressing mechanism 8 is started, so that the pre-pressing mechanism 8 pre-presses the gearbox part housing 101, and the gearbox part housing 101 is tightly fitted with the assembly mechanism 4, and then the assembly mechanism 4 and the clamping mechanism 5 are controlled to start, and the gearbox part housing 101 is mainly clamped, and then the two pre-pressing mechanisms 8 are released, and the auxiliary mechanism 6 is started at the same time, so that the auxiliary mechanism 6 supports the inside of the gearbox part housing 101, and then the four-axis turntable 2 is started. According to the set program, the four-axis turntable 2 rotates to the specified position, and after driving the assembly mechanism 4, the clamping mechanism 5 and the gearbox part housing 101 to be in place, the angular posture of the small end of the gearbox part housing 101 is checked. At this time, the lifting cylinder 9 drives the airtight detection mechanism 10 to rise. When the airtight detection mechanism 10 is inserted into the airtight detection tooth 103, it means that the posture is correct (if the posture is wrong, the equipment will alarm). After the detection is completed, the lifting cylinder 9 returns to its original position, and the equipment enters normal processing, so that when processing the circular holes on the gearbox part housing 101, it has an accurate angular positioning reference, and when processing the 28 holes with a diameter of 18 on the large end of the gearbox part housing 101 and the 18 holes with a diameter of 2.5 on the small end, the position of the processing holes can be found.

[0034] Embodiment 2, as Fig. 9 and Fig.10As shown, this embodiment adds the following structure on the basis of embodiment 1, the assembly mechanism 4 includes an assembly base 11, the assembly base 11 is connected to an assembly seat 12, a floating seat 13 is slidably connected in the assembly seat 12, an air path is provided in the assembly base 11, the output end of the air path is arranged on the left side of the floating seat 13, a thin mold expansion sleeve 14 is installed on the outer side of the assembly seat 12, the thin mold expansion sleeve 14 includes a fixed plate 15, the fixed plate 15 is provided with a plurality of elastic clamps 16, a plurality of elastic clamps 16 are provided with a clearance groove 17, the movable end of the elastic clamp 16 is in contact with the output end of the floating seat 13, a sealing assembly groove 18 is provided in the center of the assembly base 11, the assembly seat 12 and the floating seat 13, a void groove 19 is provided in the center of the thin mold expansion sleeve 14, one side of the clamping mechanism 5 passes through the void groove 19 and is installed in the sealing assembly groove 18.

[0035] In this embodiment, during use, the assembly base 11 outputs gas through the gas path, so that the gas pushes the floating seat 13, and the floating seat 13 is displaced in the assembly seat 12, so that the floating seat 13 can push the movable end of the thin mold expansion sleeve 14, so that a plurality of elastic clamps 16 are expanded, and the expanded elastic clamps 16 are just clamped on the inner side of the large end of the gearbox part housing 101, thereby clamping and fixing the large end of the gearbox part housing 101, and after the sealing assembly groove 18 is installed in conjunction with the clamping mechanism 5, gas leakage can be effectively prevented.

[0036] Embodiment 3, as Figure 8 As shown, this embodiment adds the following structure on the basis of the embodiment 1: a pre-positioning mark 20 is installed on one side of the top of the assembly seat 12 by screw locking, and the end of the pre-positioning mark 20 is arranged in a triangular structure.

[0037] In this embodiment, when the gearbox part housing 101 is installed on the assembly mechanism 4 and the clamping mechanism 5, the JY mark 104 on the gearbox part housing 101 is first aligned with the pre-positioning mark 20 to form a preliminary docking installation to facilitate subsequent positioning installation.

[0038] Embodiment 4, as Figure 8 As shown, this embodiment adds the following structure on the basis of embodiment 1: four groups of positioning columns 21 are installed on the assembly seat 12, the angle between the four groups of positioning columns 21 is 90°, and the elastic clamp 16 is provided with a gap 22 corresponding to the positioning column 21.

[0039] In this embodiment, the four positioning grooves 102 inside the large end of the gearbox part housing 101 are aligned with the four groups of positioning columns 21, and positioned and installed. After installation, the pre-pressing mechanism 8 is controlled to start at the same time to pre-press the gearbox part housing 101 so that the positioning grooves 102 in the gearbox part housing 101 are tightly fitted with the positioning columns 21.

[0040] Embodiment 5, as Figure 8 As shown, this embodiment adds the following structure on the basis of the embodiment 1: an air flow hole 43 is provided on the positioning column 21, and an air flow sensor is externally connected to the air flow hole 43.

[0041] In this embodiment, when the gearbox part housing 101 is installed in cooperation with the four groups of positioning columns 21 through the positioning grooves 102, when the positioning grooves 102 cover the positioning columns 21 and completely block the air flow holes 43, it means that the angular posture of the gearbox part housing 101 is installed correctly. If the positioning grooves 102 on the gearbox part housing 101 do not block the gearbox part housing 101 through the positioning grooves 102, so that wind flows into the air flow holes 43, it is detected by the air flow sensor and an alarm is issued, it means that the angular posture of the gearbox part housing 101 is installed incorrectly and needs to be changed.

[0042] Embodiment 6, as Fig. 9 and Fig.11 As shown, this embodiment adds the following structure on the basis of embodiment 1, the clamping mechanism 5 includes a clamping seat 23, one side of the clamping seat 23 is installed in the sealing assembly groove 18, an oil cylinder 24 is installed in the clamping seat 23, the power output end of the oil cylinder 24 is connected to the core shaft 25, a clamping head 26 is installed on the outer side of the core shaft 25, the outer surface of the clamping head 26 is arranged in an inclined structure, an elastic expansion sleeve 27 is installed on the outer side of the clamping seat 23, the core shaft 25 and the clamping head 26 are slidably arranged in the elastic expansion sleeve 27, the elastic expansion sleeve 27 includes a mounting sleeve 28, a plurality of spring pieces 29 are installed on the mounting sleeve 28, gap grooves 30 are provided between the plurality of spring pieces 29, and an expansion head 31 is installed on the other side of the spring piece 29.

[0043] In this embodiment, while the assembly mechanism 4 clamps the large end of the gearbox part housing 101, the cylinder 24 is started synchronously, so that the cylinder 24 drives the core shaft 25, and the core shaft 25 drives the clamping head 26 to move into the clamping seat 23. When the clamping head 26 moves into the clamping seat 23, the clamping head 26 will open the elastic expansion sleeve 27, so that the clamping head 26, under the effect of the outer surface of the inclined structure, pushes the expansion head 31 to expand outward, and under the effect of the spring piece 29, the expansion head 31 can be expanded to clamp and assemble the small end of the gearbox part housing 101, thereby realizing the clamping and fixation of the large and small ends of the gearbox part housing 101.

[0044] Embodiment 7, as Fig. 9 As shown, this embodiment adds the following structure on the basis of embodiment 1, the auxiliary mechanism 6 includes an auxiliary oil cylinder 32, the auxiliary oil cylinder 32 is evenly arranged on the clamping seat 23, and the power output end of the auxiliary oil cylinder 32 is connected to an auxiliary push rod 33.

[0045] In this embodiment, during use, the auxiliary oil cylinder 32 is started to push the auxiliary push rod 33 against the inner wall of the gearbox part housing 101, thereby lifting the gearbox part housing 101 to facilitate subsequent processing and use.

[0046] Embodiment 8, as Figure 5 As shown, this embodiment adds the following structure on the basis of embodiment 1, the pre-stressing mechanism 8 includes a pre-stressing cylinder 34, the power output end of the pre-stressing cylinder 34 is hinged with a pre-stressing rod 35, the pre-stressing rod 35 is connected to a hinge seat 36, and the hinge seat 36 is installed on the pre-stressing cylinder 34.

[0047] In this embodiment, during operation, the pre-stressing cylinder 34 is started to push the pre-stressing rod 35, and the pre-stressing rod 35 rotates with the hinge center of the hinge seat 36, so that the pre-stressing rod 35 can apply pre-stress to the gearbox part housing 101 to prevent the gearbox part housing 101 from sliding before clamping, causing changes in the angular posture.

[0048] Embodiment 9, as Figure 7 As shown, this embodiment adds the following structure on the basis of embodiment 1: the airtight detection mechanism 10 includes a detection box 37, a detection rod 38 is slidably installed in the detection box 37, a detection head 39 is installed on the top of the detection rod 38, a limit plate 40 is installed on the bottom of the detection rod 38, a spring 41 is installed on the bottom of the limit plate 40, and an airflow detection hole 42 is also provided on one side of the detection box 37, the input end of the airflow detection hole 42 is set on the upper side of the limit plate 40, and the output end of the airflow detection hole 42 is externally connected to an airflow sensor. Such a structural design further detects the airtight detection tooth 103 at the small end of the gearbox part housing 101, thereby ensuring the overall angular posture of the gearbox part housing 101.

[0049] In this embodiment, when performing detection, the airtight detection mechanism 10 is driven to move upward by the lifting cylinder 9 to detect the small end of the gearbox part housing 101. When the detection head 39 is inserted into the airtight detection tooth 103 at the small end of the gearbox part housing 101, it indicates that the overall angular posture of the gearbox part housing 101 is correct. When the detection head 39 is not inserted into the airtight detection tooth 103, but on the outside of the airtight detection tooth 103, the detection head 39 will push the detection rod 38, and the detection rod 38 will push the limit plate 40 downward, so that the limit plate 40 squeezes the spring 41. After the limit plate 40 moves downward, the input end of the airflow detection hole 42 loses the seal of the limit plate 40, and air flow is generated, which is then detected by the airflow sensor at the output end of the airflow detection hole 42. After the airflow sensor detects, it will alarm to prompt the operator to make changes.

[0050] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A drilling fixture with angular positioning, characterized in that: The invention comprises a base plate (1), a four-axis turntable (2) is installed on one side of the top of the base plate (1), a rotating disk (3) is installed on the power output end of the four-axis turntable (2), an assembly mechanism (4) is locked on the rotating disk (3), a clamping mechanism (5) is installed inside the assembly mechanism (4), an auxiliary mechanism (6) is installed on the outer circumference of the clamping mechanism (5), a support frame (7) is installed on the top of the base plate (1), pre-pressing mechanisms (8) are installed on both sides of the top of the support frame (7), a lifting cylinder (9) is installed on the bottom of the support frame (7), and an airtightness detection mechanism (10) is connected to the power output end of the lifting cylinder (9).

2. A drilling fixture with angular positioning according to claim 1, characterized in that: The assembly mechanism (4) comprises an assembly base (11), the assembly base (11) is connected to an assembly seat (12), a floating seat (13) is slidably connected inside the assembly seat (12), an air path is provided inside the assembly base (11), an output end of the air path is arranged on the left side of the floating seat (13), a thin mold expansion sleeve (14) is installed on the outer side of the assembly seat (12), the thin mold expansion sleeve (14) comprises a fixing plate (15), and the fixing plate (15) is provided with a plurality of elastic A chuck (16), a plurality of the elastic chucks (16) are provided with a clearance groove (17), the movable end of the elastic chuck (16) is in contact with the output end of the floating seat (13), the center of the assembly base (11), the assembly seat (12) and the floating seat (13) is provided with a sealing assembly groove (18), the center of the thin mold expansion sleeve (14) is provided with an air avoidance groove (19), one side of the clamping mechanism (5) passes through the air avoidance groove (19) and is installed in the sealing assembly groove (18).

3. A drilling fixture with angular positioning according to claim 2, characterized in that: A pre-positioning mark (20) is installed on one side of the top of the assembly seat (12) by screw locking, and the end of the pre-positioning mark (20) is arranged in a triangular structure.

4. The drilling fixture with angular positioning according to claim 3, characterized in that: Four groups of positioning columns (21) are installed on the assembly seat (12), the angles between the four groups of positioning columns (21) are 90 degrees, and the elastic clamp (16) is provided with gaps (22) corresponding to the positioning columns (21).

5. The drilling fixture with angular positioning according to claim 4, characterized in that: An air flow hole (43) is provided on the positioning column (21), and an air flow sensor is externally connected to the air flow hole (43).

6. The drilling fixture with angular positioning according to claim 5, characterized in that: The clamping mechanism (5) comprises a clamping seat (23), one side of which is mounted in a sealing assembly groove (18), an oil cylinder (24) is mounted in the clamping seat (23), a power output end of the oil cylinder (24) is connected to a core shaft (25), a clamping head (26) is mounted on the outer side of the core shaft (25), the outer surface of the clamping head (26) is arranged in an inclined structure, an elastic expansion sleeve (27) is mounted on the outer side of the clamping seat (23), the core shaft (25) and the clamping head (26) are slidably arranged in the elastic expansion sleeve (27), the elastic expansion sleeve (27) comprises a mounting sleeve (28), a plurality of spring sheets (29) are mounted on the mounting sleeve (28), gap grooves (30) are arranged between the plurality of spring sheets (29), and an expansion head (31) is mounted on the other side of the spring sheet (29).

7. The drilling fixture with angular positioning according to claim 6, characterized in that: The auxiliary mechanism (6) comprises an auxiliary oil cylinder (32), the auxiliary oil cylinder (32) is evenly arranged on the clamping seat (23), and the power output end of the auxiliary oil cylinder (32) is connected to an auxiliary push rod (33).

8. The drilling fixture with angular positioning according to claim 7, characterized in that: The pre-pressing mechanism (8) comprises a pre-pressing cylinder (34), a power output end of the pre-pressing cylinder (34) is hingedly connected with a pre-pressing rod (35), the pre-pressing rod (35) is connected with an articulated seat (36), and the articulated seat (36) is mounted on the pre-pressing cylinder (34).

9. The drilling fixture with angular positioning according to claim 8, characterized in that: The airtight detection mechanism (10) comprises a detection box (37), a detection rod (38) is slidably installed in the detection box (37), a detection head (39) is installed on the top of the detection rod (38), a limit plate (40) is installed on the bottom of the detection rod (38), a spring (41) is installed on the bottom of the limit plate (40), and an airflow detection hole (42) is also provided on one side of the detection box (37), the input end of the airflow detection hole (42) is arranged on the upper side of the limit plate (40), and the output end of the airflow detection hole (42) is externally connected to an airflow sensor.

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