Punching device and punching method for automobile iron frame skylight part

Abstract

The invention discloses a punching device and a punching method for an automobile iron frame skylight, which are used for punching the side end of the automobile iron frame skylight. A rectangular support frame; the rectangular supporting frame is arranged on the trailer frame; two groups of first positioning blocks; the two first positioning blocks are symmetrically arranged in the center of the rectangular supporting frame. Four groups of second positioning blocks; the four sets of second positioning blocks are arranged at the four end corners of the rectangular supporting frame correspondingly. A punching assembly; the clamping device has the beneficial effects that the two first positioning blocks are symmetrically arranged in the center of the rectangular supporting frame, the four second positioning blocks are arranged at the four end corners of the rectangular supporting frame correspondingly, double positioning and supporting of the center and the end corners of the automobile iron frame skylight part are achieved, the clamping stability and the position precision are remarkably improved, and machining displacement of the automobile iron frame skylight part is limited; the punching assembly is matched with the first positioning block in position, and the punching position precision and the hole pattern consistency are ensured by means of the precise positioning reference.

Description

TECHNICAL FIELD

[0001] The application relates to a punching device and a punching method for an automobile iron frame sunroof part. BACKGROUND

[0002] The side end punching quality of the automobile iron frame sunroof part directly affects the flexibility of the sunroof opening and closing, the sealing performance and the overall assembly precision. At present, in the automobile manufacturing industry, the side end punching of the automobile iron frame sunroof part with a rectangular structure is mainly realized by means of traditional general punching equipment or special tooling matched with a single driving mechanism.

[0003] In the prior art, the positioning of the automobile iron frame sunroof part is mainly realized by means of a single-reference positioning mode, for example, only by means of a center hole pin positioning or only by means of an end corner groove body limiting: the former is prone to the problem of workpiece deflection around the positioning pin under punching force due to the lack of constraint on the end corner of the workpiece, so that the radial deviation of the hole position is often more than 0.1 mm; the latter is difficult to guarantee the consistency of the overall posture of the workpiece due to the lack of center positioning, so that the punching position deviation between different workpieces can reach more than 0.3 mm, which cannot meet the high-precision requirement of automobile part assembly. In view of this, the application provides a punching device and a punching method for an automobile iron frame sunroof part to solve the above problems. SUMMARY

[0004] The application aims to provide a punching device and a punching method for an automobile iron frame sunroof part to solve the problems in the background.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: A punching device for an automobile iron frame sunroof part is used for punching the side end of the automobile iron frame sunroof part, and comprises: a trailer frame; a rectangular support frame, which is arranged on the trailer frame; two groups of first positioning blocks, which are symmetrically arranged at the center position of the rectangular support frame; four groups of second positioning blocks, which are respectively arranged at the four corner positions of the rectangular support frame; a punching assembly, which is arranged on the rectangular support frame and is used for punching the center side end surface of the automobile iron frame sunroof part; wherein the punching assembly is matched with the first positioning blocks in position; wherein the first positioning blocks are used for positioning and supporting the center position of the automobile iron frame sunroof part, and the second positioning blocks are used for positioning and supporting the four corner positions of the automobile iron frame sunroof part.

[0006] As an improvement of the above technical scheme, a first positioning groove is formed on each of the two groups of first positioning blocks, the first positioning groove is matched with the center position of the automobile iron frame sunroof part, and the automobile iron frame sunroof part is placed in the first positioning groove, so that the automobile iron frame sunroof part is positioned on the rectangular support frame at one time.

[0007] As an improvement of the above technical scheme, a second positioning groove is formed on each of the four groups of first positioning blocks, the four groups of second positioning grooves are matched with the four end corners of the automobile iron frame sunroof part respectively, and the automobile iron frame sunroof part is placed in the second positioning groove, so that the automobile iron frame sunroof part is positioned on the rectangular support frame at two times.

[0008] As an improvement of the above technical scheme, an installation groove is arranged in the first positioning groove, an installation block is connected to the installation groove through a bolt, a positioning pin is arranged on the installation block, and the positioning pin is matched with the hole of the automobile iron frame sunroof part.

[0009] As an improvement of the above technical scheme, the punching assembly comprises a fixed plate connected with the rectangular support frame. A group of punching installation plates are arranged on the fixed plate, the punching installation plates are connected with the fixed plate through bolts, a stop block is arranged on the punching installation plate, and a punching oil cylinder is arranged on the stop block.

[0010] As an improvement of the above technical scheme, a guide block is further arranged on the fixed plate, a piston rod of the punching oil cylinder is slidingly arranged in the guide block, and a punching punch is arranged on the piston rod of the punching oil cylinder for punching the side end face of the automobile iron frame sunroof part.

[0011] As an improvement of the above technical scheme, a support plate is further arranged on the fixed plate, a punching groove is formed in the support plate, and the punching groove is matched with the position of the punching punch.

[0012] A punching method of a punching device for an automobile iron frame sunroof part, comprising the following steps: Step S1: device positioning and calibration The punching device is moved to the working position by a trailer frame with horizontal adjusting legs, the levelness of the rectangular support frame is detected by a level, and the height of the adjusting leg is adjusted to make the horizontal deviation of the frame ≤0.5mm; Step S2: double positioning and clamping of the workpiece The automobile iron frame sunroof part to be punched is placed in the positioning area of the rectangular support frame, the center pre-positioning hole of the automobile iron frame sunroof part is matched with the positioning pins of the two groups of symmetrical first positioning blocks to realize hole-pin positioning, and then the four end corners of the automobile iron frame sunroof part are completely embedded in the second positioning groove (61) through the second positioning block, to form a cooperative constraint structure of center hole-pin positioning-end corner groove limiting. Step S3: precise punching operation The punching assembly matched with the hole position of the automobile iron frame sunroof part is started, the piston rod of the punching oil cylinder is extended in the axial direction under the constraint of the guide block, the punching punch is driven to punch the center side end face of the automobile iron frame sunroof part, and the punching slot on the supporting plate is in close contact with the automobile iron frame sunroof part to form a rigid reverse support, so that punching deformation is avoided. Step S4: workpiece unloading and resetting: After the punching is completed, the punching punch is retracted to the initial position by the piston rod of the punching oil cylinder, the punched automobile iron frame sunroof part is removed, and the punching waste is cleaned, and the operation is completed.

[0013] As an improvement of the above technical scheme, the step S3 further includes a modularized adaptation step of the punching assembly: According to the hole diameter (M5-M12) and the hole position coordinate requirement of the automobile iron frame sunroof part to be punched, the corresponding specification punching oil cylinder and punching punch on the punching installation plate are disassembled and replaced through quick-release bolts, so that the coaxiality of the punching punch axis and the target hole position of the automobile iron frame sunroof part is ensured to be ≤0.03mm; During the punching process, the axial excursion amplitude of the punching oil cylinder is limited to ≤0.1mm by the rigid stop block, the radial offset amount of the piston rod is corrected in real time by the guide block to ≤0.02mm, and the position of the punching punch is monitored in real time by the laser displacement sensor.

[0014] As an improvement of the above technical scheme, the step S2 and S3 further include a positioning and full inspection integrated step: Based on the double positioning reference formed in step S2, the thickness, side length and flatness of the workpiece are fully detected by using a digital depth gauge, a vernier caliper and a geometric tolerance detector; if the detection result meets the tolerance requirement (flatness ≤0.05mm), step S3 is executed; if it is unqualified, the position of the automobile iron frame sunroof part is corrected by adjusting the feed amount (adjustment accuracy 0.01mm / grade) of the second positioning block based on the first positioning groove and the second positioning groove, and then re-detection is performed. When different specifications of automobile iron frame sunroof parts are adapted, the installation block with corresponding specification positioning pins in the first positioning block is replaced by quick-release bolts, the quick-change slot type adapter on the second positioning block is replaced, and the preset positioning parameter database is called to realize the quick switching of the positioning structure, and the switching time is ≤5 minutes.

[0015] Compared with the prior art, the present application has the following advantages: The rectangular support frame is borne by the trailer frame, the bearing capacity and rigidity of the overall structure are effectively enhanced, and the basis for stable processing is provided; the two groups of first positioning blocks are symmetrically arranged at the center of the rectangular support frame, and the four groups of second positioning blocks are separately arranged at the four end corners of the rectangular support frame, so that the center and the end corner of the automobile iron frame skylight part are double-positioned and supported, the clamping stability and the position precision are significantly improved, and the processing displacement of the automobile iron frame skylight part is limited; the punching assembly is matched with the position of the first positioning block, and the punching position precision and the hole type consistency are ensured by relying on the accurate positioning reference; meanwhile, the positioning structure simplifies the workpiece clamping process, is beneficial to improving the machining efficiency, and the components form a modular layout with the rectangular support frame as the carrier, so that assembly, debugging and subsequent maintenance and replacement are facilitated, and the equipment maintenance cost is reduced. The positioning support structure formed by the first positioning block and the second positioning block on the automobile iron frame skylight part can construct a stable and unified full inspection reference, facilitate detection and processing of the size precision of the automobile iron frame skylight part, and avoid errors in detection items such as size precision, geometric tolerance and punching quality caused by the displacement of the workpiece, thereby improving the accuracy and reliability of the full inspection result, simplifying the full inspection operation steps, improving the full inspection efficiency, and adapting to the full inspection demand of the automobile iron frame skylight part in the batch production scene. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present application; Figure 2 It is a structural schematic diagram of the present application; Figure 1 It is an enlarged structural schematic diagram of position A in the present application; Figure 3 It is an enlarged structural schematic diagram of position B in the present application; Figure 1 Figure 4 It is a structural schematic diagram of the rectangular support frame of the present application; Figure 5 It is a position schematic diagram of the fixed plate and the mounting plate of the present application; Figure 6 It is a position schematic diagram of the mounting plate and the punching oil cylinder of the present application; Figure 7 It is a structural schematic diagram of the first positioning block of the present application.

[0017] In the figure: 10, trailer frame; 20, rectangular support frame; 30, automobile iron frame skylight part; 40, punching assembly; 41, guide block; 42, mounting plate; 43, punching oil cylinder; 44, stop block; 45, fixed plate; 46, punching punch; 47, support plate; 48, punching groove; 50, first positioning block; 51, positioning pin; 52, first positioning groove; 53, mounting block; 54, mounting groove; 60, second positioning block; 61, second positioning groove. DETAILED DESCRIPTION​

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example: like Figures 1-7 As shown, this embodiment proposes a punching device for automotive steel frame sunroof parts, used to punch holes on the side ends of automotive steel frame sunroof parts 30, including: Trailer frame 10; A rectangular support frame 20 is mounted on the trailer frame 10. Two sets of first positioning blocks 50; the two sets of first positioning blocks 50 are symmetrically arranged at the center of the rectangular support frame 20; Four sets of second positioning blocks 60; the four sets of second positioning blocks 60 are respectively set at the four corners of the rectangular support frame 20; Punching assembly 40; The punching assembly 40 is disposed on the rectangular support frame 20 and is used to punch holes in the center side end face of the automotive iron frame sunroof component 30. The punching assembly 40 is positioned to match the first positioning block 50. The first positioning block 50 is used to provide positioning support at the center position of the automotive steel frame sunroof component 30, and the second positioning block 60 is used to provide positioning support at the four corner positions of the automotive steel frame sunroof component 30.

[0020] In this case, the bottom of the trailer frame 10 is equipped with multiple sets of horizontal adjustment feet to level the rectangular support frame 20.

[0021] In this embodiment, when punching the side end of the automobile iron frame skylight part 30, the punching device of the automobile iron frame skylight part 30 is moved to the designated working position by the trailer frame 10, the rectangular support frame 20 is kept in a stable state, and then the automobile iron frame skylight part 30 to be punched is placed on the rectangular support frame 20, so that the center position of the automobile iron frame skylight part 30 is matched with the two groups of symmetrical first positioning blocks 50 to realize the positioning and support of the center position of the automobile iron frame skylight part 30; at the same time, the four end corners of the automobile iron frame skylight part 30 are matched with the four groups of second positioning blocks 60 respectively to complete the positioning and support of the end corner position of the automobile iron frame skylight part 30. After confirming the accurate positioning of the automobile iron frame skylight part 30, the punching assembly 40 matched with the first positioning block 50 and installed on the rectangular support frame 20 is started, and the center side end face of the automobile iron frame skylight part 30 is punched by the punching assembly 40. After the punching operation is completed, the automobile iron frame skylight part 30 that has completed the punching is taken off from the rectangular support frame 20, and the use process of the device is completed. The rectangular support frame 20 is carried by the trailer frame 10, which effectively enhances the carrying capacity and rigidity of the overall structure and provides a basis for stable processing; the two groups of first positioning blocks 50 are symmetrically arranged at the center of the rectangular support frame 20, and the four groups of second positioning blocks 60 are separately arranged at the four end corners of the rectangular support frame 20, which realizes the double positioning and support of the center and end corner of the automobile iron frame skylight part 30, significantly improves the clamping stability and position accuracy, and limits the processing displacement of the automobile iron frame skylight part 30; the punching assembly 40 is matched with the first positioning block 50, and the accurate positioning reference ensures the punching position accuracy and hole type consistency; at the same time, the positioning structure simplifies the workpiece clamping process, which is beneficial to improve the processing efficiency, and the components form a modular layout with the rectangular support frame 20 as the carrier, which is convenient for assembly, debugging and subsequent maintenance and replacement, and reduces the equipment maintenance cost. The positioning and support structure formed by the first positioning block 50 and the second positioning block 60 to the automobile iron frame skylight part 30 can build a stable and unified full inspection reference, which is convenient for detecting the size accuracy of the automobile iron frame skylight part 30. At the same time, since the positioning and support can quickly fix the automobile iron frame skylight part 30 at the work position, it avoids the errors of size accuracy, shape tolerance and punching quality caused by the displacement of the workpiece, which not only improves the accuracy and reliability of the full inspection result, but also simplifies the full inspection operation steps and improves the full inspection efficiency, which is suitable for the full inspection demand of the automobile iron frame skylight part 30 in batch production scene.

[0022] Specifically, the first positioning groove 52 is formed in each of the two groups of first positioning blocks 50, and the first positioning groove 52 is matched with the center position of the automobile iron frame skylight part 30. The automobile iron frame skylight part 30 is placed in the first positioning groove 52, so that the automobile iron frame skylight part 30 is positioned on the rectangular support frame 20 at one time.

[0023] In this embodiment, the first positioning grooves 52 on the two sets of first positioning blocks 50 are matched with the center positions of the automobile iron frame sunroof part 30, which can realize accurate fitting positioning of the center positions of the automobile iron frame sunroof part 30, effectively improve the accuracy of positioning the center positions of the automobile iron frame sunroof part 30, avoid the deviation of the subsequent punching position caused by the deviation of the positioning, simplify the positioning operation process of the automobile iron frame sunroof part 30, and do not need to adjust the positioning for many times, which significantly improves the positioning efficiency of the automobile iron frame sunroof part 30 and is beneficial to improving the production efficiency of the overall punching operation.

[0024] Specifically, the second positioning grooves 61 are arranged on the four sets of first positioning blocks 50, and the four sets of second positioning grooves 61 are matched with the four end angles of the automobile iron frame sunroof part 30, respectively. The automobile iron frame sunroof part 30 is placed in the second positioning groove 61, so that the automobile iron frame sunroof part 30 is positioned on the rectangular support frame 20 again.

[0025] In this embodiment, the four sets of second positioning grooves 61 are matched with the four end angles of the automobile iron frame sunroof part 30, respectively, which can realize fitting positioning of the end angle parts of the automobile iron frame sunroof part 30, effectively eliminate the gap error between the end angle and the positioning structure, significantly improve the positioning accuracy of the end angle position of the automobile iron frame sunroof part 30, avoid the deviation of the automobile iron frame sunroof part 30 caused by the deviation of the end angle positioning, and further complete the second positioning by the second positioning groove 61. The first positioning block 50 forms a cooperative matching, constructs a "center-end angle" double positioning system, further restricts the freedom of the automobile iron frame sunroof part 30 on the rectangular support frame 20, greatly improves the overall stability and reliability of the positioning of the automobile iron frame sunroof part 30, and prevents the automobile iron frame sunroof part 30 from translating, deflecting and other displacement phenomena when subjected to stress in the punching operation.

[0026] Specifically, the mounting groove 54 is arranged in the first positioning groove 52, the mounting block 53 is connected to the mounting groove 54 through a bolt, the positioning pin 51 is arranged on the mounting block 53, and the positioning pin 51 is matched with the hole of the automobile iron frame sunroof part 30.

[0027] In this embodiment, the positioning pin 51 is matched with the hole of the automobile iron frame sunroof part 30 to form a hole-pin positioning structure, which can more finely constrain the position of the automobile iron frame sunroof part 30, effectively limit the translation, rotation and other degrees of freedom of the automobile iron frame sunroof part 30 in the first positioning groove 52, significantly reduce the positioning error compared with simple groove positioning, further improve the positioning accuracy of the center position of the automobile iron frame sunroof part 30, and provide double protection for the hole accuracy of the subsequent punching operation. Of course, the mounting block 53 is connected in the first mounting groove 54 by bolts, so that the positioning pin 51 can be conveniently disassembled and replaced integrally with the mounting block 53; when the automobile iron frame sunroof part 30 of different hole specifications needs to be adapted, only the corresponding size of the positioning pin 51 and the mounting block 53 needs to be replaced, without the need to modify the first positioning groove 52 body, effectively expanding the application range of the device and reducing the equipment replacement cost.

[0028] Specifically, the punching assembly 40 comprises a fixed plate 45 connected with the rectangular support frame 20. Two groups of punching installation plates 42 are arranged on the fixed plate 45, the punching installation plates 42 are connected with the fixed plate 45 by bolts, and a stop block 44 is arranged on the punching installation plate 42.

[0029] Specifically, the fixed plate 45 is further provided with a guide block 41, the piston rod of the punching oil cylinder 43 is slidingly arranged in the guide block 41, and a punching punch 46 is arranged on the piston rod of the punching oil cylinder 43 for punching the side end face of the automobile iron frame sunroof part 30.

[0030] In this embodiment, the fixed plate 45 is directly connected with the rectangular support frame 20, which provides a rigid support basis for the entire punching assembly 40 and ensures that all components are always in the preset reference position during the punching operation, providing stable structural protection for precise punching. Moreover, the punching installation plate 42 is connected with the fixed plate 45 by bolts, which has the ability of convenient disassembly, replacement and position adjustment. When the punching requirements such as punching position and hole diameter of the automobile iron frame sunroof part 30 of different specifications need to be adapted, corresponding punching installation plates 42 can be replaced, the installation position can be adjusted, or punching oil cylinders 43 and punching punches 46 can be replaced, without the need to modify the fixed plate 45 and the rectangular support frame 20, which significantly expands the application range of the device and reduces the equipment modification cost. Of course, the stop block 44 can limit the punching oil cylinder 43, effectively constrain the punching oil cylinder 43 from moving or tilting in the high-pressure working state, ensure the stability of the transmission direction of the punching oil cylinder 43 output force, and prevent the punching punch 46 from deviating due to unstable installation of the punching oil cylinder 43. Moreover, the guide block 41 slidingly guides and restricts the piston rod of the punching oil cylinder 43, which can effectively correct the radial deviation of the piston rod during extension and retraction, ensure the precise movement of the piston rod along the preset axis to drive the punching punch 46, greatly reduce the punching position deviation and hole type skewing error, and significantly improve the punching size precision and hole type quality of the side end face of the automobile iron frame sunroof part 30.

[0031] Specifically, the fixed plate 45 is further provided with a support plate 47, the support plate 47 is provided with a punching groove 48, and the punching groove 48 is positionally matched with the punching punch 46.

[0032] In this embodiment, the support plate 47 forms a stable support structure through connection with the fixed plate 45, which can form effective lifting and support on the corresponding machining part of the automobile iron frame sunroof part 30 when the punching punch 46 applies force to the side end face of the automobile iron frame sunroof part 30, offsets the radial load generated by the punching force, avoids the automobile iron frame sunroof part 30 from being concave, warped or locally deformed due to stress, and guarantees the structure flatness and size accuracy of the automobile iron frame sunroof part 30 after machining.

[0033] A punching method of a punching device for an automobile iron frame sunroof part, comprising the following steps: Step S1: device positioning and calibration: The punching device is moved to the working position by the trailer frame 10 with horizontal adjustment legs, the levelness of the rectangular support frame 20 is detected by using a level, and the leg height is adjusted to make the frame horizontal deviation ≤0.5mm; Step S2: double positioning and clamping of the workpiece: The automobile iron frame sunroof part 30 to be punched is placed in the positioning area of the rectangular support frame 20, the center pre-positioning hole of the automobile iron frame sunroof part 30 is matched with the positioning pins 51 of the two symmetrical first positioning blocks 50 to realize hole pin positioning, and then the four end corners of the automobile iron frame sunroof part 30 are completely embedded in the second positioning groove 61 through the second positioning block 60, forming a cooperative constraint structure of center hole pin positioning-end corner groove body limiting; Step S3: precise punching operation: The punching assembly 40 matched with the hole position of the automobile iron frame sunroof part 30 is started, the piston rod of the punching oil cylinder 43 is stretched in the axial direction under the constraint of the guide block 41, driving the punching punch 46 to punch the center side end face of the automobile iron frame sunroof part 30, while the punching groove 48 on the support plate 47 is in close contact with the automobile iron frame sunroof part 30 to form a rigid counter support, avoiding punching deformation; Step S4: workpiece unloading and resetting: After punching is completed, the piston rod of the punching oil cylinder 43 drives the punching punch 46 to retract to the initial position, the punched automobile iron frame sunroof part 30 is removed, and the punching waste is cleaned up, completing the work.

[0034] Specifically, the step S3 further includes a modularization adaptation step of the punching assembly 40: According to the hole diameter M5-M12 and hole position coordinate requirements of the automobile iron frame sunroof part 30 to be punched, the corresponding specification punching oil cylinder 43 and punching punch 46 on the punching installation plate 42 are disassembled and replaced through quick-release bolts, ensuring that the coaxiality of the punching punch 46 axis and the target hole position of the automobile iron frame sunroof part 30 is ≤0.03mm; During the punching process, the axial displacement of the punching oil cylinder 43 is limited to ≤0.1mm by the rigid stopper 44, the radial deviation of the piston rod is corrected to ≤0.02mm by the guide block 41, and the position of the punching punch 46 is monitored in real time by the laser displacement sensor.

[0035] Specifically, the positioning and full inspection integrated step is further included between the steps S2 and S3. Based on the double positioning reference formed in the step S2, the thickness, the side length and the flatness of the workpiece are fully inspected by using the digital depth gauge, the vernier caliper and the geometric tolerance detector; if the inspection result meets the tolerance requirement that the flatness is ≤0.05mm, the step S3 is executed; if not, the position of the automobile iron frame sunroof piece 30 is corrected by adjusting the feeding amount of the second positioning block 60 by 0.01mm per grid based on the first positioning groove 52 and the second positioning groove 61, and then the automobile iron frame sunroof piece 30 is re-inspected. When the automobile iron frame sunroof piece 30 of different specifications is adapted, the mounting block 53 with the corresponding specification positioning pin 51 in the first positioning block 50 is replaced by the quick-release bolt, the quick-change slot type adapter on the second positioning block 60 is replaced, and the preset positioning parameter database is called to realize the quick switching of the positioning structure, and the switching time is ≤5 minutes.

[0036] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A punching device for a car metal frame sunroof component, used for punching holes on the side end of a car metal frame sunroof component (30), characterized in that: Include: Trailer frame (10); Rectangular support frame (20); the rectangular support frame (20) is arranged on the trailer frame (10); Two groups of first positioning blocks (50); two groups of the first positioning blocks (50) are symmetrically arranged at the center position of the rectangular support frame (20); Four groups of second positioning blocks (60); four groups of the second positioning blocks (60) are arranged at the four end corners of the rectangular support frame (20) respectively; Punching assembly (40); the punching assembly (40) is arranged on the rectangular support frame (20) for punching treatment of the center side end face of the automobile iron frame skylight piece (30); Wherein, the punching assembly (40) is matched with the first positioning block (50) position; Wherein, the first positioning block (50) is used for positioning and supporting the center position of the automobile iron frame skylight piece (30), and the second positioning block (60) is used for positioning and supporting the four end corner positions of the automobile iron frame skylight piece (30).

2. A punch device for an iron frame sunroof member of an automobile according to claim 1, characterized in that: Two groups of the first positioning blocks (50) are provided with first positioning grooves (52), the first positioning grooves (52) are matched with the center position of the automobile iron frame skylight piece (30), and the automobile iron frame skylight piece (30) is placed in the first positioning groove (52), so that the automobile iron frame skylight piece (30) is positioned on the rectangular support frame (20) once.

3. A punch device for an automotive iron frame sunroof member according to claim 1, characterized in that: Four groups of the first positioning blocks (50) are provided with second positioning grooves (61), four groups of the second positioning grooves (61) are matched with the four end corners of the automobile iron frame skylight piece (30) respectively, and the automobile iron frame skylight piece (30) is placed in the second positioning groove (61), so that the automobile iron frame skylight piece (30) is positioned on the rectangular support frame (20) twice.

4. A punch device for punching a hole in an iron frame sunroof member of an automobile according to claim 2, characterized in that: The first positioning groove (52) is provided with a mounting groove (54), the mounting groove (54) is connected with a mounting block (53) through bolts, the mounting block (53) is provided with a positioning pin (51), and the positioning pin (51) is matched with the hole of the automobile iron frame skylight piece (30).

5. The punching device for an automotive iron frame sunroof component according to claim 1, characterized in that: The punching assembly (40) comprises a fixed plate (45), and the fixed plate (45) is connected with the rectangular support frame (20); The fixed plate (45) is provided with two groups of punching installation plates (42), the punching installation plates (42) are connected with the fixed plate (45) through bolts, the punching installation plates (42) are provided with stop blocks (44), and the stop blocks (44) are provided with punching oil cylinders (43).

6. A punch device for punching a hole in an iron frame sunroof member of an automobile according to claim 5, characterized in that: The fixed plate (45) is further provided with a guide block (41), a piston rod of the punching oil cylinder (43) is slidingly arranged in the guide block (41), a punching punch (46) is arranged on the piston rod of the punching oil cylinder (43), and the punching punch (46) is used for punching treatment of the side end face of the automobile iron frame skylight piece (30).

7. A punch device for punching a hole in an iron frame sunroof member of an automobile according to claim 6, characterized in that: The fixed plate (45) is further provided with a support plate (47), the support plate (47) is provided with a punching groove (48), and the punching groove (48) is matched with the punching punch (46) in position.

8. A piercing method of a piercing apparatus for a vehicle iron frame sunroof member according to any one of claims 1 to 7, characterized in that: The steps include: Step S1: device positioning calibration: The punching device is moved to the working position by the trailer frame (10) with horizontal adjustment legs, the levelness of the rectangular support frame (20) is detected by using a level, and the height of the legs is adjusted to make the horizontal deviation of the frame ≤0.5mm; Step S2: double positioning and clamping of the workpiece: Place the automobile iron frame skylight piece (30) to be punched on the positioning area of the rectangular support frame (20), first realize hole pin positioning by matching the center preset positioning hole of the automobile iron frame skylight piece (30) with the positioning pins (51) of the two symmetrical first positioning blocks (50), and then embed the four end corners of the automobile iron frame skylight piece (30) into the second positioning grooves (61) through the second positioning blocks (60), to form a cooperative constraint structure of center hole pin positioning-end corner groove limiting; Step S3: precise punching operation: Start the punching assembly (40) matched with the hole position of the automobile iron frame skylight piece (30), the piston rod of the punching oil cylinder (43) extends axially under the constraint of the guide block (41), drives the punching punch (46) to punch the center side end face of the automobile iron frame skylight piece (30), and the punching groove (48) on the supporting plate (47) is in close contact with the automobile iron frame skylight piece (30) to form a rigid reverse support, so as to avoid punching deformation; Step S4: workpiece unloading and resetting: After punching is completed, the piston rod of the punching oil cylinder (43) drives the punching punch (46) to retract to the initial position, the punched automobile iron frame skylight piece (30) is removed, and the punching waste is cleaned up, to complete the operation.

9. The piercing method of a piercing apparatus for an automotive iron frame sunroof member according to claim 8, characterized in that: The step S3 further includes a modularized adaptation step of the punching assembly (40): According to the hole diameter (M5-M12) and hole position coordinate requirement of the automobile iron frame skylight piece (30) to be punched, corresponding specification punching oil cylinders (43) and punching punches (46) on the punching mounting plate (42) are disassembled and replaced through quick-release bolts, to ensure that the coaxiality of the punching punch (46) axis and the target hole position of the automobile iron frame skylight piece (30) is ≤0.03mm; During the punching process, the axial excursion amplitude of the punching oil cylinder (43) is limited to ≤0.1mm by the rigid stop block (44), the radial offset amount of the piston rod is corrected in real time to ≤0.02mm by the guide block (41), and the position of the punching punch (46) is monitored in real time by the laser displacement sensor.

10. The piercing method of a piercing apparatus for an automotive iron frame sunroof member according to claim 8, characterized by: The steps S2 and S3 further include a positioning and full inspection integrated step: Based on the double positioning reference formed in step S2, the thickness, side length and flatness of the workpiece are fully inspected by using a digital depth gauge, a vernier caliper and a geometric tolerance detector; if the inspection result meets the tolerance requirement (flatness ≤0.05mm), step S3 is executed; if it is unqualified, the position of the automobile iron frame skylight piece (30) is corrected by adjusting the feed amount (adjustment accuracy 0.01mm / grade) of the second positioning block (60) based on the first positioning groove (52) and the second positioning groove (61), and then the automobile iron frame skylight piece (30) is re-inspected. When adapting different specifications of automobile iron frame sunroof parts (30), the mounting block (53) with corresponding specification positioning pins (51) in the first positioning block (50) is replaced by quick release bolts, the quick change slot type adapter on the second positioning block (60) is replaced, and the preset positioning parameter database is called to realize the quick switching of the positioning structure, and the switching time is ≤5 minutes.

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