Clamping device for machining end face of locking head of civil air defense door

Abstract

The utility model relates to the technical field of civil air defense door locking head machining, in particular to a clamping device for civil air defense door locking head end face machining, which comprises a mounting plate and a locking head bearing plate. The lower surface of the mounting plate is mounted on a drilling and milling machine machining platform, the upper surface of the mounting plate is hinged to the locking head bearing plate, and an angle adjusting structure is mounted on the upper surface of the mounting plate and used for adjusting the overturning angle of the locking head bearing plate relative to the mounting plate with a hinge piece as a rotating shaft; three limiting baffles are arranged on the upper surface of the locking head bearing plate in a protruding mode, a containing space with an opening is defined by the three limiting baffles, the containing space is used for containing a plurality of man door locking heads side by side, and the to-be-machined end faces of the man door locking heads all face the opening. A fixing structure is installed on the limiting baffle and used for fixing a plurality of personal protection door locking heads in the containing space. The civil air defense door locking head machining device can solve the technical problems of poor machining precision, low machining efficiency and the like in the existing civil air defense door locking head machining technology.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of the locking head of civil air defense door processing, especially to a clamping device for the end face processing of the locking head of civil air defense door. BACKGROUND

[0002] At the current stage, the end face processing of the locking head of civil air defense door generally relies on the traditional equipment of drilling and milling machine. However, this processing mode has many limitations. Specifically, the processing platform of the drilling and milling machine can only accommodate and process one locking head of civil air defense door at a time, which greatly limits the improvement of production batch. More complicatedly, the clamping process of the locking head of civil air defense door needs to accurately control and adjust its angle to ensure the processing precision. This means that after completing the processing of the end face of one position, the operator must re-adjust the angle of the locking head to continue the processing of the end face of the next position.

[0003] This processing mode not only has complex operation, but also is difficult to effectively control the processing precision. Each angle adjustment may introduce new errors, thereby affecting the quality and performance of the final product. In addition, due to the complicated processing steps, the entire processing cycle is greatly prolonged, resulting in extremely low processing efficiency.

[0004] Therefore, in view of the current situation of the end face processing of the locking head of civil air defense door, it is necessary to explore a more efficient and accurate processing mode. SUMMARY

[0005] The purpose of the utility model is to provide a clamping device for the end face processing of the locking head of civil air defense door to solve the technical problems of poor processing precision and low processing efficiency existing in the current end face processing technology of the locking head of civil air defense door.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A clamping device for the end face processing of the locking head of civil air defense door, comprising a mounting plate, a locking head support plate, an angle adjusting structure and a fixing structure;

[0008] The lower surface of the mounting plate is installed on the processing platform of the drilling and milling machine through the mounting piece, the upper surface of the mounting plate and the locking head support plate are hinged through the hinge piece, the angle adjusting structure is installed between the mounting plate and the locking head support plate, and the angle adjusting structure is used to adjust the turning angle of the locking head support plate relative to the mounting plate with the hinge piece as the pivot;

[0009] The upper surface of the locking head support plate is provided with three limiting baffle plates, three limiting baffle plates enclose a placing space with an opening, the placing space is used for placing multiple locking heads of civil air defense door side by side, and the end faces to be processed of multiple locking heads of civil air defense door are placed towards the opening;

[0010] The fixing structure is installed on the limiting baffle, and is used for fixing the multiple door locking heads in the placing space.

[0011] Preferably, the angle adjusting structure comprises an adjusting screw, a lower adjusting piece and an upper adjusting piece.

[0012] The locking head supporting plate is provided with a long hole.

[0013] One end of the adjusting screw is fixedly arranged on the upper surface of the mounting plate, the other end of the adjusting screw is sequentially arranged through the lower adjusting piece, the long hole and the upper adjusting piece, and the lower adjusting piece and the upper adjusting piece are both threadedly connected with the adjusting screw.

[0014] Preferably, the adjusting screw is arranged in an inclined manner on the mounting plate, and the adjusting screw is gradually arranged close to the hinge piece from bottom to top.

[0015] Preferably, the number of the angle adjusting structure is two groups, and the two groups of the angle adjusting structure are symmetrically arranged between the mounting plate and the locking head supporting plate.

[0016] Preferably, the fixing structure comprises a front fixing assembly and a side fixing assembly.

[0017] The front fixing assembly is installed between the two limiting baffles close to the opening, and the fixed end of the front fixing assembly can be moved close to or away from the placing space, when the fixed end of the front fixing assembly is close to the placing space, the front fixing assembly is used for abutting the multiple door locking heads in the placing space against the upper surface of the locking head supporting plate.

[0018] The side fixing assembly is installed on one side of one of the limiting baffles close to the opening, and the fixed end of the side fixing assembly can be movably arranged through the limiting baffle to extend into the placing space, when the fixed end of the side fixing assembly extends into the placing space, the side fixing assembly is used for abutting the multiple door locking heads in the placing space against the inner surface of the other limiting baffle close to the opening.

[0019] Preferably, the side fixing assembly comprises a fixed adjusting seat and a lateral locking screw.

[0020] The fixed adjusting seat is installed on one side of one of the limiting baffles close to the opening, and a through side screw hole is arranged between the fixed adjusting seat and the limiting baffle.

[0021] One end of the lateral locking screw rod is arranged through the lateral threaded hole, and the rod body of the lateral locking screw rod is screwed with the lateral threaded hole, and the other end of the lateral locking screw rod is provided with an adjusting handle.

[0022] Preferably, the front fixing assembly comprises a fixing pressing plate and two front locking screw rods.

[0023] The fixing adjusting seat is provided with a front threaded hole.

[0024] Both ends of the fixing pressing plate are provided with front notches, one end of one of the front locking screw rods is arranged through one of the front notches and screwed with the front threaded hole, and one end of the other front locking screw rod is arranged through the other front notch and fixedly connected with the upper surface of the locking head supporting plate.

[0025] The other end of each of the two front locking screw rods is screwed with a front locking nut.

[0026] Preferably, the mounting member comprises a mounting bolt and a mounting nut.

[0027] The drilling and milling machine processing platform is provided with an inverted T-shaped groove.

[0028] The side edge of the mounting plate is provided with a side notch, the side notch is correspondingly mounted with the inverted T-shaped groove, the head end of the mounting bolt is mounted in the inverted T-shaped groove, and the tail end of the mounting bolt extends out of the side notch and is screwed with the mounting nut.

[0029] Preferably, the hinge member comprises a hinge pipe, a hinge shaft and a hinge nut.

[0030] One side of the mounting plate and one side of the locking head supporting plate are both provided with the hinge pipe, the hinge shaft is arranged through the two hinge pipes, the two ends of the hinge shaft extend out of the two hinge pipes, and the two ends of the hinge shaft are both screwed with the hinge nut.

[0031] Preferably, the outer side of the limiting baffle plate is provided with a reinforcing rib plate.

[0032] One of the above technical solutions has the following beneficial effects:

[0033] 1. Improve processing efficiency: by fixing multiple civil defense door locking heads for end face processing at one time, the clamping frequency of single locking head is significantly reduced, thereby greatly improving the processing efficiency.

[0034] 2. Ensure processing accuracy: the angle adjusting structure allows accurate adjustment of the placement angle of the civil defense door locking head according to the processing requirements, ensuring that the end face to be processed of each civil defense door locking head can accurately face the cutter, thereby ensuring the consistency of the processing accuracy.

[0035] 3. Enhance operation convenience: the design of the limiting baffle and the fixing structure makes the placement and fixation of the civil defense door locking head simple and fast, reduces the operation difficulty, and improves the operation convenience.

[0036] 4. Improve processing safety: the fixing structure ensures the stability of the civil defense door locking head during the processing, effectively prevents displacement caused by vibration or cutter, and reduces the risk of safety accidents. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a structural schematic view of a clamping device for end face processing of a civil defense door locking head of the utility model;

[0038] Figure 2 is a top view schematic view of a clamping device for end face processing of a civil defense door locking head of the utility model;

[0039] Figure 3 is a side view schematic view of a clamping device for end face processing of a civil defense door locking head of the utility model;

[0040] In the drawings: mounting plate 1, locking head support plate 2, angle adjusting structure 3, fixing structure 4, mounting piece 5, drilling and milling machine processing platform 6, hinged piece 7, limiting baffle 8, civil defense door locking head 9, side edge notch 10, reinforcing rib plate 11, long hole 20, adjusting screw 31, lower adjusting piece 32, upper adjusting piece 33, front fixed assembly 41, side fixed assembly 42, mounting bolt 51, mounting nut 52, hinge pipe 71, hinge shaft 72, hinged nut 73, fixed pressing plate 411, front locking screw 412, fixed adjusting seat 421, side locking screw 422, adjusting handle 423. DETAILED DESCRIPTION

[0041] The technical scheme of the utility model will be further described below in combination with the drawings and through specific embodiments.

[0042] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0043] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0044] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "installation", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0045] A clamping device for machining the end face of the locking head of civil air defense door, comprising a mounting plate 1, a locking head support plate 2, an angle adjusting structure 3 and a fixing structure 4;

[0046] The lower surface of the mounting plate 1 is installed on the drilling and milling machine processing platform 6 through the mounting piece 5, the upper surface of the mounting plate 1 and the locking head support plate 2 are hinged through the hinge piece 7, the angle adjusting structure 3 is installed between the mounting plate 1 and the locking head support plate 2, the angle adjusting structure 3 is used for adjusting the overturning angle of the locking head support plate 2 relative to the mounting plate 1 with the hinge piece 7 as the pivot;

[0047] The upper surface of the locking head support plate 2 is provided with three limiting baffle plates 8, three limiting baffle plates 8 form a placing space with an opening, the placing space is used for placing multiple civil air defense door locking heads 9 side by side, and the end faces of multiple civil air defense door locking heads 9 to be machined are placed towards the opening;

[0048] The fixing structure 4 is installed on the limiting baffle plate 8, and the fixing structure 4 is used for fixing multiple civil air defense door locking heads 9 in the placing space.

[0049] As shown in the drawing, Figures 1-3 The working principle of the clamping device is as follows:

[0050] Firstly, the lower surface of the mounting plate 1 is firmly installed on the processing platform of the drilling and milling machine through the mounting piece 5, to ensure the stability of the whole clamping device. Then, the locking head support plate 2 is connected with the upper surface of the mounting plate 1 through the hinge piece 7, and the hinge design enables the locking head support plate 2 to overturn within a certain range around the hinge piece 7.

[0051] The angle adjustment structure 3 is installed between the upper surface of the mounting plate 1 and the lower surface of the locking head supporting plate 2. The core function of this structure is to adjust the overturning angle of the locking head supporting plate 2, so that it can accurately change the angle around the hinge 7 according to the processing needs. In this way, the locking head placed on the locking head supporting plate 2 can face the drill milling tool at the best angle, ensuring the processing accuracy.

[0052] More importantly, the upper surface of the locking head supporting plate 2 is designed with three protruding limiting plates 8, which are closely surrounded to form a placement space with an opening, designed to accommodate multiple civil defense door locking heads 9. Multiple civil defense door locking heads 9 can be placed side by side, and all the end faces to be processed are neatly directed towards the opening direction. Such a layout not only facilitates the feeding of the drill milling tool, but also improves the processing efficiency.

[0053] Finally, the fixing structure 4 is installed on the limiting plate 8, which mainly functions to firmly fix the multiple civil defense door locking heads 9 placed in the placement space. This design ensures the stability of the civil defense door locking head 9 during processing, preventing displacement caused by vibration or tool impact, thereby further ensuring processing accuracy and safety.

[0054] Therefore, the beneficial effects of the utility model are as follows:

[0055] 1. Improve processing efficiency: By fixing multiple civil defense door locking heads 9 for end face processing at one time, the clamping frequency of a single locking head is significantly reduced, thereby greatly improving processing efficiency.

[0056] 2. Ensure processing accuracy: The angle adjustment structure 3 allows accurate adjustment of the placement angle of the civil defense door locking head 9 according to the processing needs, ensuring that the end face to be processed of each civil defense door locking head 9 can accurately face the tool, thereby ensuring the consistency of processing accuracy.

[0057] 3. Enhance operational convenience: The design of the limiting plate 8 and the fixing structure 4 makes the placement and fixation of the civil defense door locking head 9 simple and fast, reduces the difficulty of operation, and improves the convenience of operation.

[0058] 4. Improve processing safety: The fixing structure 4 ensures the stability of the civil defense door locking head 9 during processing, effectively preventing displacement caused by vibration or tool action, thereby reducing the risk of safety accidents.

[0059] In summary, in order to improve the machining efficiency of the end face of the civil air defense door locking head 9, the utility model provides a clamping device for machining the end face of the civil air defense door locking head 9, which can be directly installed and fixed on the drilling and milling machine processing platform 6. When the end face of the civil air defense door locking head 9 needs to be machined, the original clamping device on the drilling and milling machine processing platform 6 can be directly replaced and used. More importantly, multiple civil air defense door locking heads 9 can be placed in the clamping device, so that the drilling and milling machine can machine the end faces of multiple civil air defense door locking heads 9 at one time, and the clamping device can be freely adjusted in angle, so that the end face machining station of the civil air defense door locking head 9 clamped in the device can be quickly and accurately adjusted and converted, which not only improves the machining efficiency and precision, but also enhances the safety and flexibility of operation.

[0060] Further, the angle adjusting structure 3 comprises an adjusting screw 31, a lower adjusting part 32 and an upper adjusting part 33.

[0061] The locking head supporting plate 2 is provided with a long hole 20.

[0062] One end of the adjusting screw 31 is fixedly arranged on the upper surface of the mounting plate 1, the other end of the adjusting screw 31 is sequentially arranged through the lower adjusting part 32, the long hole 20 and the upper adjusting part 33, and the lower adjusting part 32 and the upper adjusting part 33 are threadedly connected with the adjusting screw 31.

[0063] As shown in the figure, the structure of the lower adjusting part 32 is consistent with that of the upper adjusting part 33, and the lower adjusting part 32 comprises an adjusting nut and an adjusting washer. Figure 3 In actual operation, the operator can push the locking head supporting plate 2 to move along the rod body of the adjusting screw 31 by rotating the combination of the adjusting nut and the adjusting washer of the lower adjusting part 32 on the adjusting screw 31. Due to the existence of the long hole 20 and the hinge part 7, the locking head supporting plate 2 can be flipped to adjust the angle relative to the mounting plate 1 with the hinge part 7 as the pivot without detaching the adjusting screw 31.

[0064] When the required angle is adjusted, the operator rotates the upper adjusting part 33 on the adjusting screw 31 to make it close to and lock the locking head supporting plate 2. The friction force generated by the threaded connection of the upper adjusting part 33 and the lower adjusting part 32 stably fixes the locking head supporting plate 2 at the preset position of the adjusting screw 31, prevents the angle from deviating in the subsequent work, and improves the reliability and safety of the equipment.

[0065] In summary, the angle adjusting structure 3 can quickly adjust the angle of the locking head supporting plate 2 through simple rotation operation, without complex disassembly or reassembly process, which greatly improves the work efficiency.

[0066] In summary, the angle adjusting structure 3 can quickly adjust the angle of the locking head supporting plate 2 through simple rotation operation, without complex disassembly or reassembly process, which greatly improves the work efficiency.

[0067] To further explain, the adjusting screw 31 is inclined on the mounting plate 1, and the adjusting screw 31 is gradually moved closer to the hinge 7 from bottom to top.

[0068] Specifically, such as Figure 3 As shown, the adjusting screw 31 is mounted on the mounting plate 1, and is not mounted vertically, but rather at an angle that gradually approaches the hinge 7 from bottom to top. This design allows the locking head support plate 2 to make linear displacement along its inclined path when adjusting the flip angle of the locking head support plate 2, thus improving the accuracy of the adjustment.

[0069] To further explain, the angle adjustment structure 3 is in the form of two sets, and the two sets of angle adjustment structures 3 are symmetrically arranged between the mounting plate 1 and the locking head support plate 2.

[0070] Since the two sets of angle adjustment structures 3 are symmetrically designed between the upper surface of the mounting plate 1 and the lower surface of the locking head support plate 2, they can apply force evenly, ensuring the stability of the locking head support plate 2 after adjustment, and avoiding the twisting or loosening of the locking head 9 of the air defense door due to uneven force during the processing.

[0071] To further explain, the fixing structure 4 includes a front fixing component 41 and a side fixing component 42;

[0072] The front fixing component 41 is installed between the two limiting baffles 8 near the opening, and the fixing end of the front fixing component 41 can move closer to or further away from the placement space. When the fixing end of the front fixing component 41 is close to the placement space, the front fixing component 41 is used to press the multiple locking heads 9 of the air defense door in the placement space against the upper surface of the locking head support plate 2.

[0073] The side fixing component 42 is installed on one side of one of the limiting baffles 8 near the opening, and the fixing end of the side fixing component 42 is movably inserted through the limiting baffle 8 to extend into the placement space. When the fixing end of the side fixing component 42 extends into the placement space, the side fixing component 42 is used to abut the multiple locking heads 9 of the air defense door in the placement space against the inner surface of the other limiting baffle 8 near the opening.

[0074] Specifically, such as Figure 1As shown, the design of the fixing structure 4 aims to ensure the stability and positional accuracy of the air defense door locking head 9 within the placement space. The fixing structure 4 consists of two parts: a front fixing component 41 and a side fixing component 42. These components fix the air defense door locking head 9 from two directions, greatly enhancing its stability within the placement space and preventing displacement due to vibration or external forces.

[0075] First, the user operates the front fixing component 41, moving its fixing end into the placement space until it abuts against the air defense door locking head 9 on the locking head support plate 2. In this way, the front fixing component 41 firmly abuts the air defense door locking head 9 against the support plate, fixing the air defense door locking head 9 within the placement space. Next, the user operates the side fixing component 42, extending its fixing end into the placement space until it abuts against the air defense door locking head 9 on the inner surface of another limiting baffle 8 near the opening. In this way, the side fixing component 42 fixes multiple air defense door locking heads 9 side-by-side on one side of its direction of movement, further enhancing its stability.

[0076] To further explain, the side fixing assembly 42 includes a fixing adjustment seat 421 and a side locking screw 422;

[0077] The fixed adjustment seat 421 is installed on one side of one of the limiting baffles 8 near the opening, and a through side threaded hole is provided between the fixed adjustment seat 421 and one of the limiting baffles 8.

[0078] One end of the lateral locking screw 422 passes through the side threaded through hole, and the shaft of the lateral locking screw 422 is threadedly connected to the side threaded through hole. The other end of the lateral locking screw 422 is equipped with an adjustment handle 423.

[0079] Specifically, such as Figure 3 As shown, one end of the lateral locking screw 422 is designed to pass through a threaded through-hole in the side of the fixed adjusting seat 421, and its shaft is threadedly connected to the threaded through-hole. This threaded connection allows the lateral locking screw 422 to move axially along the threaded through-hole during rotation, thereby locking or unlocking the object on the other side. For ease of operation, an adjusting handle 423 is installed at the other end of the lateral locking screw 422. The operator can easily drive the lateral locking screw 422 to rotate by rotating the adjusting handle 423, thereby achieving precise control of the locking degree.

[0080] To further explain, the front fixing assembly 41 includes a fixing plate 411 and two forward locking screws 412;

[0081] The fixed adjustment seat 421 has a front threaded through hole;

[0082] The fixed pressure plate 411 has positive notches 413 at both ends. One end of one positive locking screw 412 passes through one of the positive notches 413 and is threadedly connected to the front threaded through hole. The other end of the positive locking screw 412 passes through the other positive notch 413 and is fixedly connected to the upper surface of the locking head support plate 2.

[0083] The other end of each of the two positive locking screws 412 is threaded with a positive locking nut 414.

[0084] like Figure 2 As shown, after multiple air defense door locking heads 9 are placed side by side in the placement space, two positive locking screws 412 are respectively inserted through the positive notches 413 at both ends of the fixing plate 411, so that the lower surface of the fixing plate 411 presses against the multiple air defense door locking heads 9, and then the positive locking nuts 414 are used for locking. Due to the use of threaded connection, the positive locking nuts 414 can gradually approach the fixing plate 411 during rotation, thereby achieving stable locking of the fixing plate 411. This locking method is not only firm and reliable, but also effectively prevents the multiple air defense door locking heads 9 from loosening or displacing during the stress process.

[0085] To further explain, the mounting component 5 includes a mounting bolt 51 and a mounting nut 52;

[0086] The milling and drilling machine processing platform 6 is provided with an inverted T-slot 60;

[0087] The mounting plate 1 has a side notch 10 on its side, which is installed in correspondence with the inverted T-slot 60. The head end of the mounting bolt 51 is installed upside down in the inverted T-slot 60, and the tail end of the mounting bolt 51 extends out of the side notch 10 and is threadedly connected to the mounting nut 52.

[0088] Specifically, such as Figure 3 As shown, first, the mounting plate 1 is attached to the milling machine platform 6. After the side notches 10 machined on both sides of the mounting plate 1 are aligned with the inverted T-slots 60 of the milling machine platform 6, the mounting plate 1 is securely installed to the milling machine platform 6 using mounting bolts 51 and fixing adjustment nuts 52. The mounting component 5 adopts a threaded adjustment and quick-locking structure, allowing the user to easily fix and release the entire clamping device.

[0089] To further explain, the hinge 7 includes a hinge tube 71, a hinge shaft 72, and a hinge nut 73;

[0090] The side of the mounting plate 1 and the side of the locking head supporting plate 2 are both provided with the hinge pipe 71, the hinge shaft 72 is arranged in the two hinge pipes 71, the two ends of the hinge shaft 72 are arranged out of the two hinge pipes 71, and the two ends of the hinge shaft 72 are both provided with the hinge nut 73.

[0091] Specifically, as shown in the figure, Figure 2 The hinge member 7 is designed to realize the free rotation of the locking head supporting plate 2.

[0092] Further, the outer side of the limiting baffle 8 is provided with the reinforcing rib plate 11.

[0093] Specifically, as shown in the figure, Figure 2 The reinforcing rib plate 11 is helpful to reduce the vibration and shaking of the limiting baffle 8 under stress, and improve the stability and precision of the equipment operation.

[0094] The technical principle of the utility model is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the utility model, and cannot be interpreted as the limitation of the protection scope of the utility model in any way. Based on the explanation herein, the skilled in the art can think of other specific embodiments of the utility model without creative labor, and these equivalent variants or replacements are all included in the range defined by the claims of the present application.

Claims

1. A clamping device for machining the end face of a human defense door closure head, characterized in that, It comprises a mounting plate (1), a locking head supporting plate (2), an angle adjusting structure (3) and a fixing structure (4). The lower surface of the mounting plate (1) is mounted on the drilling and milling machine processing platform (6) through a mounting piece (5), the upper surface of the mounting plate (1) and the locking head supporting plate (2) are hinged through a hinge piece (7), the angle adjusting structure (3) is installed between the mounting plate (1) and the locking head supporting plate (2), and the angle adjusting structure (3) is used for adjusting the overturning angle of the locking head supporting plate (2) relative to the mounting plate (1) with the hinge piece (7) as the pivot. The upper surface of the locking head supporting plate (2) is provided with three limiting baffle plates (8), the three limiting baffle plates (8) form a placement space with an opening, the placement space is used for placing multiple civil air defense door locking heads (9) side by side, and the end faces to be machined of the multiple civil air defense door locking heads (9) are all placed towards the opening. The fixing structure (4) is installed on the limiting baffle plate (8), and the fixing structure (4) is used for fixing the multiple civil air defense door locking heads (9) in the placement space.

2. The clamping device for machining the end face of the closing head of a civil defense door according to claim 1, characterized in that, The angle adjusting structure (3) comprises an adjusting screw (31), a lower adjusting piece (32) and an upper adjusting piece (33). The locking head supporting plate (2) is provided with a long hole (20). One end of the adjusting screw (31) is fixedly arranged on the upper surface of the mounting plate (1), the other end of the adjusting screw (31) is sequentially arranged through the lower adjusting piece (32), the long hole (20) and the upper adjusting piece (33), and the lower adjusting piece (32) and the upper adjusting piece (33) are both in threaded connection with the adjusting screw (31).

3. The clamping device for machining the end face of the closing head of a civil defense door according to claim 2, characterized in that, The adjusting screw (31) is arranged in an inclined manner on the mounting plate (1), and the adjusting screw (31) is gradually arranged close to the hinge piece (7) from bottom to top.

4. The clamping device for machining the end face of the closing head of a civil defense door according to claim 3, characterized in that, The number of the angle adjusting structure (3) is two groups, and the two groups of angle adjusting structures (3) are symmetrically arranged between the mounting plate (1) and the locking head supporting plate (2).

5. The clamping device for machining the end face of the closing head of a civil defense door according to claim 1, characterized in that, The fixing structure (4) comprises a front fixing assembly (41) and a side fixing assembly (42). The front fixing assembly (41) is installed between the two limiting baffle plates (8) close to the opening, and the fixing end of the front fixing assembly (41) can move close to or away from the placement space, when the fixing end of the front fixing assembly (41) is close to the placement space, the front fixing assembly (41) is used for abutting the multiple civil air defense door locking heads (9) in the placement space against the upper surface of the locking head supporting plate (2). The side fixing assembly (42) is installed on one side of one of the limiting baffle plates (8) near the opening, and the fixed end of the side fixing assembly (42) can be movably arranged through the limiting baffle plate (8) to extend into the placing space, and when the fixed end of the side fixing assembly (42) extends into the placing space, the side fixing assembly (42) is used for abutting the plurality of civil air defense door locking heads (9) in the placing space against the inner surface of the other limiting baffle plate (8) near the opening.

6. The clamping device for machining the end face of the closing head of a civil defense door according to claim 5, characterized in that, The side fixing assembly (42) comprises a fixed adjusting seat (421) and a side locking screw (422). The fixed adjusting seat (421) is installed on one side of one of the limiting baffle plates (8) near the opening, and a through side threaded hole is formed between the fixed adjusting seat (421) and the limiting baffle plate (8). One end of the side locking screw (422) is arranged through the side threaded hole, and the shank of the side locking screw (422) is threadedly connected with the side threaded hole, and the other end of the side locking screw (422) is provided with an adjusting handle (423).

7. The clamping device for machining the end face of the closing head of a civil defense door according to claim 6, characterized in that, The front fixing assembly (41) comprises a fixed pressing plate (411) and two front locking screws (412). The fixed adjusting seat (421) is provided with a front threaded hole. Two ends of the fixed pressing plate (411) are provided with front notches (413), one end of one of the front locking screws (412) is arranged through one of the front notches (413) and is threadedly connected with the front threaded hole, and one end of the other front locking screw (412) is arranged through the other front notch (413) and is fixedly connected with the upper surface of the locking head supporting plate (2). The other ends of the two front locking screws (412) are threadedly connected with front locking nuts (414).

8. The clamping device for machining the end face of the closing head of a civil defense door according to claim 1, characterized in that, The mounting member (5) comprises a mounting bolt (51) and a mounting nut (52). The drilling and milling machine processing platform (6) is provided with an inverted T-shaped groove (60). A side edge of the mounting plate (1) is provided with a side edge notch (10), the side edge notch (10) is correspondingly mounted with the inverted T-shaped groove (60), the head end of the mounting bolt (51) is invertedly mounted in the inverted T-shaped groove (60), and the tail end of the mounting bolt (51) extends out of the side edge notch (10) and is threadedly connected with the mounting nut (52).

9. The clamping device for machining the end face of the closing head of a civil defense door according to claim 1, characterized in that, The hinge member (7) comprises a hinge pipe (71), a hinge shaft (72) and a hinge nut (73). One side of the mounting plate (1) and one side of the locking head supporting plate (2) are both provided with the hinge pipe (71), the hinge shaft (72) is arranged through the two hinge pipes (71), and the two ends of the hinge shaft (72) extend out of the two hinge pipes (71) and are both threadedly provided with the hinge nut (73).

10. The clamping device for machining the end face of the closing head of a civil defense door according to claim 1, characterized in that, The limiting baffle plate (8) is provided with a reinforcing rib plate (11) on the outside.

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