A punching device for flange processing

Abstract

The present invention discloses a punching device for flange processing, which relates to the technical field of flange plate punching. The punching device for flange processing includes a three-axis drilling mechanism, and a loading and clamping mechanism is arranged on one side of the three-axis drilling mechanism; the loading and clamping mechanism includes two U-shaped material racks, and a telescopic cylinder is arranged between the two U-shaped material racks. The cylinder rod of the telescopic cylinder is connected with a T-shaped sleeve rod through a cross-slot coupling; the T-shaped sleeve rod is movably connected to the middle shaft, and the middle shaft is used for the movable connection of two pressure plates; after the loading and clamping mechanism completes the loading and fixing of the flange, the three-axis drilling mechanism can move along the X, Y, and Z axes and perform hole opening operations on the flange plate. After the processing is completed, the processed flange is taken down by the unloading mechanism and placed on the workpiece table automatically. This processing process does not require manual participation, greatly improving the work efficiency.

Description

Technical Field

[0001] The present invention specifically relates to the technical field of flange drilling, and specifically is a drilling device for flange processing. Background Art

[0002] A flange, also known as a flange or a rim, is a disc-shaped part, usually used to connect pipes to each other, and also for connecting equipment to pipes or between equipment, and is connected to the pipe end or the equipment inlet and outlet.

[0003] A flange connection consists of a pair of flanges, a gasket, and several bolts and nuts. The gasket is placed between the two flange sealing surfaces. After tightening the nuts, the gasket deforms to fill the unevenness on the sealing surface, making the connection tight and leak-free.

[0004] Chinese Patent Publication No. CN 219788605 U, a glass fiber reinforced plastic flange hole-opening device, includes a frame and a drilling motor. The output shaft of the drilling motor is connected with a drill bit. A placement table for placing the flange is provided below the drill bit on the frame. A limiting structure for horizontally limiting the flange is provided on the placement table. An installation block is provided on the frame. The installation block is movably arranged on the frame in a left-right manner through a displacement structure. A first cylinder is provided on the installation block. The free end of the piston rod of the first cylinder is provided with a second cylinder and a limiting post. The piston rods of the first cylinder and the second cylinder both vertically expand and contract. The drilling motor is arranged at the free end of the piston rod of the second cylinder. When the piston rod of the first cylinder extends, the free end of the limiting post abuts against the upper surface of the flange.

[0005] When processing the flange in the above patent, it is processed one by one. After one flange is processed, the staff takes down the processed flange, and then installs the flange to be processed. This flange processing method is very cumbersome and has low work efficiency. The picking and placing of parts both require manual cooperation. Summary of the Invention

[0006] The purpose of the present invention is to provide a drilling device for flange processing, which can automatically install the flange to be processed into the processing tooling, then process it by itself, and after processing, the manipulator automatically takes it down. This process does not require manual participation, greatly reducing the labor intensity of workers and improving the processing efficiency of flanges. To solve the technical problems proposed in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A drilling device for flange processing includes a three-axis drilling mechanism, and a feeding and clamping mechanism is provided on one side of the three-axis drilling mechanism.

[0009] The feeding and clamping mechanism described above includes two U-shaped material racks, and a telescopic cylinder is provided between the two U-shaped material racks. The cylinder rod of the telescopic cylinder is connected with a T-shaped sleeve rod through a cross-slot coupling; the T-shaped sleeve rod is movably connected to the intermediate shaft, and the intermediate shaft is used for the movable connection of two pressure plates;

[0010] The pressure plate has a U-shaped groove, and both ends of the pressure plate are movably connected to the slider through a rotating shaft; the slider is slidably connected to a chute opened on one side of the clamping tooling close to the pressure plate;

[0011] The clamping tooling has two stepped grooves facilitating the clamping of the flange, and the lower end of the clamping tooling is slidably connected to the slide rail; there are two slide rails, which are fixed on the transition support plate.

[0012] As a further technical solution of the present invention, the two U-shaped material racks are fixed inside the storage box, and a main support is fixed at the bottom of the storage box, and the main support is fixed on the machine box body through bolts.

[0013] As a further technical solution of the present invention, a front end plate is also fixed at one end of the storage box close to the pressure plate. There is a cavity between the front end plate and the U-shaped material rack that can accommodate the expansion and contraction of the material blocking plate. The material blocking plate is fixed on the cylinder rod of the material blocking cylinder; the material blocking cylinder is fixed on the support, and the bottom of the support is fixed to the two sides of the storage box.

[0014] As a further technical solution of the present invention, a rectangular groove is opened at the middle position of the front end plate for the two pressure plates to enter between the two U-shaped material racks.

[0015] As a further technical solution of the present invention, the clamping tooling abuts against a clamping platform opened in the middle of the V-shaped slide rail in the processing state; an end stop is fixed at one end of the V-shaped slide rail through bolts, and a clamping block is slidably connected to the upper surface at the other end of the V-shaped slide rail;

[0016] The clamping block is fixed on the cylinder rod of the clamping cylinder; the clamping cylinder is fixed on the fixed seat, and the fixed seat is fixed to the side of the main support;

[0017] The V-shaped slide rail is fixed on the support plate through countersunk bolts; the support plate and the main support are horizontally fixed through bolts.

[0018] As a further technical solution of the present invention, the three-axis drilling mechanism can move along the X, Y, and Z axes and perform hole-opening operations on the flange; the three-axis drilling mechanism has two hole-opening drills; the three-axis drilling mechanism is cooperatively installed on the machine box body.

[0019] As a further technical solution of the present invention, a workpiece table is provided on one side of the machine box body, and a discharging mechanism is provided behind the workpiece table, and the discharging mechanism is used for picking up the processed flange.

[0020] As a further technical solution of the present invention, the discharging mechanism includes a linear cylinder fixed on an L-shaped support, and a carrier block is fixed at the end of the cylinder rod of the linear cylinder; the carrier block is slidably connected to a guide rod, and both ends of the guide rod are fixed to the L-shaped support and an end plate respectively;

[0021] A linear slide table is fixed on the outer side of the carrier block, and a lifting frame is fitted and installed on the linear slide table; two suction cups are fitted and installed at the bottom of the lifting frame.

[0022] As a further technical solution of the present invention, the upper surface of the main support is inclined, and the storage box and the U-shaped material rack are fitted and installed on the inclined surface at the top of the main support, and the inclination angle is greater than 10 degrees and less than 45 degrees.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. In the present invention, the clamping tooling is attached to the front end plate, and the flanges to be processed in the two inclined U-shaped material racks are pushed into the stepped groove inside the clamping tooling; then the cylinder rod of the telescopic cylinder extends, and the clamping tooling slides along the slide rail to the clamping platform in the V-shaped slide rail. At this time, the cylinder rod of the telescopic cylinder continues to extend, and the four sliders installing the pressure plate slide along the chute to both ends of the clamping tooling respectively until the pressure plate presses the flange to be processed, so as to avoid coming off during the hole opening process, thereby realizing the automatic feeding and clamping fixation of the flange, saving the participation of manual labor and greatly improving the work efficiency;

[0025] 2. In the present invention, when a flange enters the clamping tooling, the gap between this flange and the next flange just lies in the cavity between the front end plate and the U-shaped material rack. At this time, the cylinder rod of the material blocking cylinder extends, so that the material blocking plate blocks the two flanges; in this way, after the clamping tooling is removed, the other flange will not fall off;

[0026] 3. In the present invention, when the clamping tooling abuts against the inner side of the clamping platform opened in the middle of the V-shaped slide rail, one side of the clamping tooling fits with the end block, and then the cylinder rod of the clamping cylinder extends, pushing the clamping block to slide along the V-shaped slide rail, so that the clamping tooling is clamped between the clamping block and the end block, so that the clamping tooling has good stability when the three-axis drilling mechanism drills holes in the flange;

[0027] 4. In the present invention, after the feeding and clamping mechanism finishes feeding and fixing the flange, the three-axis drilling mechanism can move along the X, Y, and Z axes and perform hole-opening operations on the flange. After the processing is completed, the unloading mechanism takes down the processed flange and places it on the workpiece table by itself. This processing process does not require manual participation and greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0029] Figure 2 In the present invention Figure 1 is a schematic diagram of the right-side structure.

[0030] Figure 3 In the present invention Figure 1 is a partial structural schematic diagram.

[0031] Figure 4 In the present invention Figure 3 is a schematic diagram of another perspective.

[0032] Figure 5 In the present invention Figure 4 is a front view.

[0033] Figure 6 is a schematic diagram of the processing state in a plane of the present invention.

[0034] Figure 7 is a schematic diagram of the picking state in a plane of the present invention.

[0035] Figure 8 is a structural schematic diagram of the unloading mechanism of the present invention.

[0036] Figure 9 is a structural schematic diagram of the feeding and clamping mechanism of the present invention.

[0037] Figure 10 In the present invention Figure 1 is an enlarged schematic diagram at position A.

[0038] Figure 11 In the present invention Figure 2 is an enlarged schematic diagram at position B.

[0039] Figure 12 In the present invention Figure 9 is an enlarged schematic diagram at position C.

[0040] Figure 13 is a structural schematic diagram of the V-shaped slide rail of the present invention.

[0041] In the figure: 1 - machine box body, 2 - three-axis drilling mechanism, 3 - feeding and clamping mechanism, 4 - unloading mechanism, 5 - workpiece table;

[0042] 31 - Stock bin, 32 - U-shaped material rack, 33 - Front end plate, 34 - Bracket, 35 - Material blocking cylinder, 36 - Material blocking plate, 37 - Telescopic cylinder, 38 - Cross-slot coupling, 39 - T-shaped sleeve rod, 310 - Pressure plate, 311 - Clamping tooling, 312 - Slide rail, 313 - Slide block, 314 - Slide groove, 315 - End stop, 316 - V-shaped slide rail, 317 - Clamping block, 318 - Clamping cylinder, 319 - Main bracket, 320 - Fixed seat, 321 - Transition frame plate, 322 - Clamping platform, 323 - Bracket plate;

[0043] 41 - L-shaped support, 42 - Guide rod, 43 - End plate, 44 - Carrier block, 45 - Linear slide, 46 - Lifting frame, 47 - Suction cup, 48 - Linear cylinder, 49 - Upright frame. Specific embodiments

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] Please refer to Figures 1 to 13 , in the embodiments of the present invention, a drilling device for flange processing includes a three-axis drilling mechanism 2, and a loading and clamping mechanism 3 is provided on one side of the three-axis drilling mechanism 2;

[0046] The loading and clamping mechanism 3 includes two U-shaped material racks 32, and a telescopic cylinder 37 is provided between the two U-shaped material racks 32. The cylinder rod of the telescopic cylinder 37 is connected with the T-shaped sleeve rod 39 through a cross-slot coupling 38; the T-shaped sleeve rod 39 is movably connected to the intermediate shaft, and the intermediate shaft is used for the movable connection of two pressure plates 310;

[0047] The pressure plate 310 has a U-shaped groove, and both ends of the pressure plate 310 are movably connected to the slide block 313 through a rotating shaft; the slide block 313 is slidably connected to a slide groove 314 opened on one side of the clamping tooling 311 close to the pressure plate 310;

[0048] The clamping tooling 311 has two stepped grooves convenient for the flange to be embedded, and the lower end of the clamping tooling 311 is slidably connected to the slide rail 312; two slide rails 312 are provided and fixed on the transition frame plate 321.

[0049] Specifically, the two U-shaped material racks 32 are fixed inside the storage box 31. The bottom of the storage box 31 is fixed with a main bracket 319, and the main bracket 319 is fixed to the machine box body 1 by bolts. The upper surface of the main bracket 319 is inclined. The storage box 31 and the U-shaped material racks 32 are cooperatively installed on the inclined surface at the top of the main bracket 319, and the inclination angle is greater than 10 degrees and less than 45 degrees.

[0050] By adopting the above technical solution, during use, first stack the flanges to be processed in the two U-shaped material racks 32. At this time, the cylinder rod of the telescopic cylinder 37 is in a contracted state, so the two pressing plates 310 are contracted in the cavity between the two U-shaped material racks 32, and the clamping tooling 311 is in contact with the front end plate 33. The flanges to be processed in the two inclined U-shaped material racks 32 are pushed into the stepped groove inside the clamping tooling 311.

[0051] Then the cylinder rod of the telescopic cylinder 37 extends, and the clamping tooling 311 slides along the slide rail 312 to the clamping platform 322 of the V-shaped slide rail 316. At this time, the cylinder rod of the telescopic cylinder 37 continues to extend, and the four sliders 313 installing the pressing plates 310 slide along the chute 314 to both ends of the clamping tooling 311 respectively until the pressing plates 310 press the flanges to be processed, thus avoiding the flanges from coming out during the hole opening process.

[0052] Please refer to the appendix Figures 10 to 12 As shown, a front end plate 33 is also fixed at one end of the storage box 31 close to the pressing plate 310. There is a cavity between the front end plate 33 and the U-shaped material rack 32 that can accommodate the expansion and contraction of the material blocking plate 36. The material blocking plate 36 is fixed on the cylinder rod of the material blocking cylinder 35. The material blocking cylinder 35 is fixed to the bracket 34, and the bottom of the bracket 34 is fixed to the two sides of the storage box 31. A rectangular groove is opened at the middle position of the front end plate 33 for the two pressing plates 310 to enter between the two U-shaped material racks 32.

[0053] Specifically, before threading holes are opened in the flanges to be processed, chamfering treatment has been done. Therefore, there will be a certain gap between the flanges due to the chamfering. By adopting the above technical solution, when a flange enters the clamping tooling 311, the gap between this flange and the next flange is just in the cavity between the front end plate 33 and the U-shaped material rack 32. At this time, the cylinder rod of the material blocking cylinder 35 extends, so that the material blocking plate 36 blocks the two flanges. In this way, after the clamping tooling 311 is removed, the other flange will not fall off.

[0054] Please refer to the appendix Figures 5 to 7 、 Figures 9 to 12, in this embodiment, when in the processing state, the clamping tooling 311 abuts against the clamping platform 322 formed in the middle of the V-shaped slide rail 316; one end of the V-shaped slide rail 316 is fixed with an end stop 315 by bolts, and a clamping block 317 is slidably connected to the upper surface at the other end of the V-shaped slide rail 316;

[0055] The clamping block 317 is fixed on the cylinder rod of the clamping cylinder 318; the clamping cylinder 318 is fixed on the fixed seat 320, and the fixed seat 320 is fixed to the side of the main bracket 319; the V-shaped slide rail 316 is fixed on the support plate 323 by countersunk bolts; the support plate 323 and the main bracket 319 are horizontally fixed by bolts.

[0056] By adopting the above technical solution, when the clamping tooling 311 abuts against the inner side of the clamping platform 322 formed in the middle of the V-shaped slide rail 316, one side of the clamping tooling 311 fits with the end stop 315, and then the cylinder rod of the clamping cylinder 318 extends, pushing the clamping block 317 to slide along the V-shaped slide rail 316, so that the clamping tooling 311 is clamped between the clamping block 317 and the end stop 315, thus having better stability when the three-axis drilling mechanism 2 drills holes in the flange.

[0057] Please refer to the appendix Figures 1 to 5 , in this embodiment, the three-axis drilling mechanism 2 can move along the X, Y, and Z axes and perform hole-opening operations on the flange; the three-axis drilling mechanism 2 has two hole-opening drills; the three-axis drilling mechanism 2 is cooperatively installed on the machine box body 1.

[0058] Specifically, one side of the machine box body 1 is provided with a workpiece table 5, and a discharging mechanism 4 is arranged behind the workpiece table 5, and the discharging mechanism 4 is used for picking up the processed flange.

[0059] By adopting the above technical solution, after the feeding and clamping mechanism 3 completes the feeding and fixing of the flange, the three-axis drilling mechanism 2 can move along the X, Y, and Z axes and perform hole-opening operations on the flange. After the processing is completed, the processed flange is taken down by the discharging mechanism 4 and placed on the workpiece table 5 automatically. This processing process does not require manual participation and greatly improves the work efficiency.

[0060] Please refer to the appendix Figure 8 , in this embodiment, the discharging mechanism 4 includes a linear cylinder 48 fixed on an L-shaped support 41, and a load block 44 is fixed to the end of the cylinder rod of the linear cylinder 48; the load block 44 is slidably connected to the guide rod 42, and both ends of the guide rod 42 are fixed to the L-shaped support 41 and the end plate 43 respectively;

[0061] A linear slide 45 is fixed to the outer side of the carrier block 44, and a lifting frame 46 is fitted and installed on the linear slide 45; two suction cups 47 are fitted and installed at the bottom of the lifting frame 46.

[0062] By adopting the above technical solution, after the flange is processed, the piston rod of the telescopic cylinder 37 contracts, so that the two pressure plates 310 move closer to the inside and release the pressing on the flange. Subsequently, the piston rod of the linear cylinder 48 extends, causing the carrier block 44 to move along the guide rod 42 towards the flange plate. Then, the linear slide 45 drives the lifting frame 46 to move downward, making the suction cups 47 fit against the outer side of the flange. Subsequently, the processed flange is sucked up. The piston rod of the linear cylinder 48 contracts, moving the flange above the workpiece table 5 and successfully placing the flange on the workpiece table 5.

[0063] As a further description of this embodiment, the suction cup 47 can be a negative pressure suction cup for sucking fiberglass flanges; it can also be an electromagnet flange for sucking metal flanges; or a suction cup with hooks can be used to pick up the flange with the hooks.

[0064] The working principle is as follows: When in use, first stack the flanges to be processed in the two U-shaped material racks 32. At this time, the piston rod of the telescopic cylinder 37 is in a contracted state, so the two pressure plates 310 are retracted into the cavity between the two U-shaped material racks 32. The clamping tooling 311 is in contact with the front end plate 33, and the flanges to be processed in the two inclined U-shaped material racks 32 are pushed into the stepped groove inside the clamping tooling 311.

[0065] Then the piston rod of the telescopic cylinder 37 extends, and the clamping tooling 311 slides along the slide rail 312 to the clamping platform 322 of the V-shaped slide rail 316. At this time, the piston rod of the telescopic cylinder 37 continues to extend, and the four sliders 313 installed with the pressure plates 310 slide along the chute 314 towards the two ends of the clamping tooling 311 respectively until the pressure plates 310 press the flanges to be processed, thus preventing them from coming out during the drilling process.

[0066] When the clamping tooling 311 abuts against the inner side of the clamping platform 322 opened in the middle of the V-shaped slide rail 316, one side of the clamping tooling 311 fits with the end stop 315. Then the piston rod of the clamping cylinder 318 extends, pushing the clamping block 317 to slide along the V-shaped slide rail 316, so that the clamping tooling 311 is clamped between the clamping block 317 and the end stop 315. In this way, it has good stability when the three-axis drilling mechanism 2 drills holes in the flange; the three-axis drilling mechanism 2 moves along the X, Y, and Z axes and performs hole-opening operations on the flange plate.

[0067] After the flange is processed, the rod of the telescopic cylinder 37 contracts, causing the two pressure plates 310 to move closer to the inside and release the clamping of the flange. Subsequently, the rod of the linear cylinder 48 extends, causing the carrier block 44 to move along the guide rod 42 towards the flange. Then, the linear slide 45 drives the lifting frame 46 to move downward, causing the suction cup 47 to fit against the outside of the flange. Subsequently, the processed flange is sucked up. The rod of the linear cylinder 48 contracts, causing the flange to move above the workpiece table 5 and successfully place the flange on the workpiece table 5.

[0068] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0069] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A punching device for flange processing, characterized in that: It includes a three-axis drilling mechanism (2), and a loading clamping mechanism (3) is arranged on one side of the three-axis drilling mechanism (2); The described loading clamping mechanism (3) includes two U-shaped material racks (32), and a telescopic cylinder (37) is arranged between the two U-shaped material racks (32). The cylinder rod of the telescopic cylinder (37) is connected with a T-shaped sleeve rod (39) through a cross-slot coupling (38); the described T-shaped sleeve rod (39) is movably connected to the intermediate shaft, and the intermediate shaft is used for the movable connection of two pressure plates (310); The described pressure plate (310) has a U-shaped groove, and both ends of the pressure plate (310) are movably connected to a slider (313) through a rotating shaft; the described slider (313) is slidably connected in a chute (314) opened on the side of the clamping tooling (311) close to the pressure plate (310); The described clamping tooling (311) has two stepped grooves convenient for the flange to be embedded, and the lower end of the clamping tooling (311) is slidably connected to a slide rail (312); there are two of the described slide rails (312), and they are fixed on a transition support plate (321); The two described U-shaped material racks (32) are fixed inside a storage box (31), and a main support (319) is fixed at the bottom of the storage box (31), and the main support (319) is fixed on the machine box body (1) through bolts; The clamping tooling (311) abuts against a clamping platform (322) opened in the middle of a V-shaped slide rail (316) during the processing state; one end of the V-shaped slide rail (316) is fixed with an end stop block (315) through bolts, and a clamping block (317) is slidably connected to the upper surface of the other end of the V-shaped slide rail (316); The V-shaped slide rail (316) is fixed on a support plate (323) through countersunk bolts; the support plate (323) and the main support (319) are horizontally fixed through bolts.

2. The punching device for flange processing according to claim 1, characterized in that: One end of the described storage box (31) close to the pressure plate (310) is also fixed with a front end plate (33), and there is a cavity between the front end plate (33) and the U-shaped material rack (32) that can accommodate the expansion and contraction of a material blocking plate (36), wherein the material blocking plate (36) is fixed on the cylinder rod of a material blocking cylinder (35); the described material blocking cylinder (35) is fixed on a support (34), and the bottom of the support (34) is fixed to the two side edges of the storage box (31).

3. The punching device for flange processing according to claim 2, wherein: A rectangular groove for the two pressure plates (310) to enter between the two U-shaped material racks (32) is opened at the middle position of the described front end plate (33).

4. The punching device for flange processing according to claim 1, characterized in that: The described clamping block (317) is fixed on the cylinder rod of a clamping cylinder (318); the described clamping cylinder (318) is fixed on a fixed seat (320), and the fixed seat (320) is fixed to the side edge of the main support (319).

5. The punching device for flange processing according to claim 1, characterized in that: The described three-axis drilling mechanism (2) can move along the X, Y, and Z axes and perform hole opening operations on the flange; the three-axis drilling mechanism (2) has two hole opening drills; the described three-axis drilling mechanism (2) is cooperatively installed on the machine box body (1).

6. The punching device for flange processing according to claim 1, wherein: One side of the machine body case (1) is provided with a workpiece table (5), and a discharging mechanism (4) is arranged behind the workpiece table (5). The discharging mechanism (4) is used for picking up the processed flange plates.

7. The punching device for flange processing according to claim 6, characterized in that: The discharging mechanism (4) includes a linear cylinder (48) fixed on an L-shaped support (41), and a carrier block (44) is fixed to the end of the cylinder rod of the linear cylinder (48); the carrier block (44) is slidably connected to a guide rod (42), and both ends of the guide rod (42) are respectively fixed to the L-shaped support (41) and an end plate (43); A linear slide table (45) is fixed to the outside of the carrier block (44), and a lifting frame (46) is fitted and installed on the linear slide table (45); two suction cups (47) are fitted and installed at the bottom of the lifting frame (46).

8. The punching device for flange processing according to claim 1, wherein: The upper surface of the main support (319) is inclined, and the storage box (31) and the U-shaped material rack (32) are fitted and installed on the inclined surface at the top of the main support (319), and the inclination angle is greater than 10 degrees and less than 45 degrees.

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