Cylinder processing equipment and processing method

Abstract

The present application relates to the field of hydraulic cylinder processing and manufacturing, and in particular to a cylinder processing equipment, including an inner support chamfering portion for abutting and fixing the circumferential inner wall of a cylinder blank and chamfering the circumferential outer wall of the cylinder blank, and also includes an extension cylinder, a base block driven by the extension cylinder and capable of moving toward the cylinder blank along the axial direction of the cylinder blank, a plurality of outer wall clamping rods evenly arranged around the axis of the inner support chamfering portion to fix one end of the cylinder blank and slidably connected to the base block, a pressure sensor provided on the outer wall clamping rod and capable of abutting against the circumferential outer wall of the cylinder blank, a rod shifting mechanism provided on the base block and capable of synchronously moving all the outer wall base rods toward the circumferential outer wall of the cylinder blank, and a controller electrically connected to the pressure sensor and the extension cylinder, the controller being capable of controlling the operation of the inner support chamfering portion and the rod shifting mechanism, and at least three outer wall clamping rods being provided to stop processing the cylinder blank when the concentricity of the cylinder blank is poor.

Description

Technical Field

[0001] The present application relates to the field of hydraulic cylinder processing and manufacturing, and in particular to a cylinder barrel processing device and a processing method. Background Art

[0002] In order to improve the structural strength and safety of the hydraulic cylinder barrel, it is necessary to chamfer the outer circumference of the end surface of the cylinder barrel.

[0003] The existing cylinder chamfering generally requires the cylinder blank to be fixed. A three-jaw chuck or an internal support clamp can be used. The cylinder blank is then rotated around its own axis, and the cutter head is fed along the axis of the cylinder blank to chamfer the outer periphery of the end face of the cylinder blank. For example, a hydraulic cylinder barrel chamfering processing method, a hydraulic cylinder barrel processing method and an apparatus are disclosed with publication number CN111659904A.

[0004] With respect to the above-mentioned related technologies, if the distance between the axes of the inner circle and the outer circle of the cylinder blank, that is, the concentricity of the inner and outer circles of the cylinder blank, is poor, the processing quality of the chamfer will be affected during the process of fixing the inner wall of the cylinder blank and then chamfering the outer wall of the cylinder blank. Summary of the invention

[0005] In order to reduce the impact on the processing quality of chamfering, the present application provides a cylinder processing equipment and a processing method.

[0006] In a first aspect, the present application provides a cylinder processing equipment adopting the following technical solution.

[0007] A cylinder processing equipment comprises an inner support chamfering portion for pressing and fixing the circumferential inner wall of a cylinder blank and chamfering the circumferential outer wall of the cylinder blank, and also comprises an extension cylinder, a base block driven by the extension cylinder and capable of moving toward the cylinder blank along the axial direction of the cylinder blank, a plurality of outer wall clamping rods evenly arranged around the axis of the inner support chamfering portion fixing one end of the cylinder blank and slidably connected to the base block, a pressure sensor provided on the outer wall clamping rod and capable of pressing against the circumferential outer wall of the cylinder blank, a rod shifting mechanism provided on the base block and capable of synchronously moving all the outer wall clamping rods toward the circumferential outer wall of the cylinder blank, and a controller electrically connected to the pressure sensor and the extension cylinder, wherein the controller can control the operation of the inner support chamfering portion and the rod shifting mechanism, and there are at least three outer wall clamping rods.

[0008] By adopting the above technical scheme, the outer wall clamping rod drives the cylinder blank to move toward the inner support chamfering part, and the inner support chamfering part first fixes the inside of the cylinder blank. If the concentricity of the inner and outer circles of the cylinder blank is poor, the inner support chamfering part will cause excessive pressure on the inner wall of the cylinder blank close to the axis of the outer wall of the cylinder blank, so that the pressure value detected by the corresponding pressure sensor will be too large, so as to determine that the corresponding cylinder blank is unqualified. The unqualified cylinder blank will not be chamfered, so that the chamfering quality of the cylinder blank will not be greatly affected.

[0009] Optionally, the rod shifting mechanism includes a movable gear ring rotatably connected to the base block, a plurality of gear ring blocks fixedly connected to the movable gear ring, a clamping rod wedge fixedly connected to the outer wall clamping rod and capable of abutting against the gear ring block, a rod shifting motor that drives the movable gear ring to rotate and is electrically connected to the controller, and a return spring that forces the outer wall clamping rod to move away from the axis of the cylinder blank. The gear ring block can push the clamping rod wedge block toward the axis of the cylinder blank as the movable gear ring rotates.

[0010] By adopting the above technical solution, all the outer wall clamping rods can move synchronously to ensure that the outer wall axis of the cylinder blank fixed by the outer wall clamping rods is consistent with the axis of one end of the cylinder blank fixed by the inner support chamfered portion.

[0011] Optionally, one end of the gear ring block that contacts the clamp rod wedge block is in an arc surface.

[0012] By adopting the above technical solution, the gear ring block can push the clamping rod wedge block more smoothly during the process of rotating with the movable gear ring.

[0013] Optionally, the extension cylinder is connected to a fixed frame, the frame is provided with a lifting cylinder electrically connected to a controller, and the lifting cylinder power rod is detachably connected to a lifting arc sleeve that fits the circumferential outer wall of the cylinder blank.

[0014] By adopting the above technical solution, the cylinder blank located on the lifting arc sleeve can move to a position aligned with the inner support chamfered portion, so that all the outer wall clamping rods can stably fix the outer wall of the cylinder blank.

[0015] Optionally, there is a conveying chain frame with a chain arranged inside on one side of the frame body, and the chain inside the conveying chain frame is detachably connected to an array of two end arc blocks in each group for placing cylinder blanks, and the conveying chain frame is provided with a chain motor for conveying the end arc blocks, and the lifting arc sleeve is directly opposite to the space between two end arc blocks in the same group.

[0016] By adopting the above technical solution, the cylinder blank can be continuously conveyed to the lifting arc sleeve for loading, and the chamfered cylinder blank can also be conveyed to the next workstation.

[0017] Optionally, the conveying chain is provided with a proximity sensor for the cylinder blank that is moved by the lifting arc sleeve, and the proximity sensor is electrically connected to the controller.

[0018] By adopting the above technical solution, the conveying chain frame will stop moving the end arc block only when the cylinder blank moves close to the sensor, so that even if a part of the end arc block does not place the cylinder blank, it is not easy to affect the processing efficiency of the cylinder blank.

[0019] Optionally, the frame is provided with two material rail cylinders electrically connected to the controller, the two material rail cylinder power rods are detachably connected with inclined material rails for rolling downward of unqualified cylinder barrel blanks, and the frame is detachably connected with a return box for receiving unqualified cylinder barrel blanks at the bottom end of the inclined material rails.

[0020] By adopting the above technical solution, unqualified cylinder blanks can be placed in a return box for centralized processing without having to be put back on the end arc sleeve.

[0021] Optionally, the side of the inclined rail is fixedly connected to a side baffle plate close to the end of the cylinder blank, the side baffle plate is slidably connected to a push plate that can push the cylinder blank toward the return box, the side baffle plate is rotatably connected to a push screw threadedly connected to the push screw plate, and the side baffle plate is provided with a screw motor that drives the push screw to rotate and is electrically connected to the controller.

[0022] By adopting the above technical solution, it is ensured that the cylinder blank is not easily tilted on the inclined material rail and hits the side baffle and cannot roll down the inclined material rail, ensuring that the cylinder blank can smoothly enter the return box.

[0023] Optionally, the bevel rail is provided with a distance sensor facing the cylinder blank on the bevel rail, the distance sensor is electrically connected to the controller, and the push plate is penetrated by a plate opening, which is located on the line connecting the distance sensor and the cylinder blank on the bevel rail.

[0024] By adopting the above technical solution, when the cylinder blank can smoothly roll down the inclined material rail, the push plate does not need to move, thereby accelerating the recovery rate of unqualified cylinder blanks.

[0025] In a second aspect, the present application provides a cylinder barrel processing method adopting the following technical solution.

[0026] A cylinder processing method uses the above-mentioned cylinder processing equipment and specifically includes the following steps.

[0027] Step 1: Place the cylinder blank on a set of end arc blocks, and the chain motor drives the cylinder blank to move to a position directly opposite to the proximity sensor;

[0028] Step 2: Lift the cylinder to drive the cylinder blank to move up a predetermined distance;

[0029] Step 3, the extension cylinder drives the base block to move a predetermined distance toward the cylinder blank;

[0030] Step 4, the rod shifting motor drives the movable gear ring to rotate so that all the outer wall clamping rods move toward the cylinder blank until the pressure values ​​detected by all the pressure sensors reach a predetermined value;

[0031] Step 5, the extension cylinder drives the base block to move a predetermined distance toward the inner support chamfered portion;

[0032] Step 6, the inner support chamfered part clamps the inner wall of the end of the cylinder blank away from the extension cylinder. If the pressure value detected by the pressure sensor increases and exceeds the predetermined range after the inner support chamfered part fixes the cylinder blank, the corresponding cylinder blank is unqualified; if the pressure value detected by the pressure sensor is within the predetermined range after the inner support chamfered part fixes the cylinder blank, the corresponding cylinder blank is qualified;

[0033] Step 7: The qualified cylinder blank is chamfered and cut from the inner support chamfering part;

[0034] Step 8. The unqualified cylinder blank is first released from the inner support chamfer, and the extension cylinder puts the unqualified cylinder blank back onto the lifting arc sleeve. Then the material rail cylinder brings the two inclined material rails close together, and then the unqualified cylinder blank falls onto the two inclined material rails during the downward movement and enters the return box.

[0035] By adopting the above technical solution, only the cylinder blank with qualified concentricity is chamfered, so as to achieve high-quality chamfering of the cylinder blank.

[0036] In summary, the present application includes at least the following beneficial effects:

[0037] Unqualified cylinder blanks are not chamfered, so that the chamfering quality of the cylinder blanks is not easily affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the main structure of this application;

[0039] Figure 2 is the control block diagram of this application;

[0040] Figure 3 It is a schematic diagram of the structure of the base block at one side where the outer wall clamping rod is arranged;

[0041] Figure 4 It is a schematic diagram of the structure at the inclined rail.

[0042] Explanation of the reference numerals in the accompanying drawings: 1. Inner support chamfer; 2. Extension cylinder; 3. Base block; 31. Push plate; 32. Push screw; 33. Screw motor; 34. Distance sensor; 35. Plate mouth; 4. Outer wall clamping rod; 41. Lifting arc sleeve; 42. Conveying chain frame; 43. End arc block; 44. Material rail cylinder; 45. Inclined material rail; 46. Return material box; 47. Proximity sensor; 48. Chain motor; 49. Side baffle; 5. Pressure sensor; 51. Rod shifting mechanism; 52. Controller; 53. Moving gear ring; 54. Gear ring block; 55. Clamping rod wedge block; 56. Rod shifting motor; 57. Reset spring; 58. Frame; 59. Lifting cylinder. DETAILED DESCRIPTION

[0043] The present application is further described in detail below in conjunction with the accompanying drawings.

[0044] The present application embodiment discloses a cylinder processing device, referring to Figure 1 , including a horizontally placed conveying chain frame 42, with corresponding chains and sprockets arranged inside the conveying chain frame 42, an array of end arc blocks 43 of two in each group are evenly and fixedly connected between the two chains of the conveying chain frame 42, and the two ends of the cylinder blank are placed in the same group of two end arc blocks 43 in a one-to-one correspondence, and the conveying chain frame 42 is detachably connected to a chain motor 48 whose output shaft is coaxially detachably connected to the sprocket inside the conveying chain frame 42, so that the end arc blocks 43 can be continuously conveyed along the length direction of the conveying chain frame 42.

[0045] Reference Figure 1 and Figure 2 The conveying chain frame 42 is detachably connected to a frame body 58, and the frame body 58 is detachably connected to a lifting cylinder 59 between the two sides of the conveying chain frame 42. The upper end of the power rod of the lifting cylinder 59 is detachably connected to a lifting arc sleeve 41, and the lifting arc sleeve 41 fits the circumferential outer wall below the center point of the cylinder blank so that the cylinder blank can move vertically upward. The conveying chain frame 42 is detachably connected to a proximity sensor 47, and the proximity sensor 47 is directly opposite to the lifting cylinder 59 in the width direction of the conveying chain frame 42. The proximity sensor 47, the lifting cylinder 59 and the chain motor 48 are all electrically connected to a controller 52, so that when the cylinder blank moves to the top of the proximity sensor 47, the chain motor 48 stops running, and then the power rod of the lifting cylinder 59 extends, so that the lifting arc sleeve 41 drives the cylinder blank to move upward.

[0046] Reference Figure 1 and Figure 3The frame 58 is detachably connected to an inner support chamfered portion 1 electrically connected to the controller 52. The specific structure of the inner support chamfered portion 1 can be consistent with the relevant technology in the background technology, so it is not repeated here. The cylinder blank moves up to the point where the axis of the outer wall and the axis of one end of the inner support chamfered portion 1 that fixes the inner wall of the cylinder blank are consistent, and then stops moving up. The frame 58 is detachably connected to an extension cylinder 2 electrically connected to the controller 52. The power rod of the extension cylinder 2 is detachably connected to a base block 3. The base block 3 is evenly provided with a plurality of outer wall clamping rods 4 around the axis of one end of the inner support chamfered portion 1 that fixes the inner wall of the cylinder blank. The number of the outer wall clamping rods 4 is at least three. Each outer wall clamping rod 4 is detachably connected to a pressure sensor 5 electrically connected to the controller 52 at one end facing the outer wall of the cylinder blank. The pressure sensor 5 abuts against the outer wall of the cylinder blank to detect the pressure applied by the outer wall clamping rod 4 to the outer wall of the cylinder blank. Each outer wall clamping rod 4 is slidably connected to the base block 3, and the outer wall clamping rod 4 moves axially at one end toward the inner support chamfered portion 1 to fix the inner wall of the cylinder blank. The base block 3 is provided with a rod moving mechanism 51 that enables all outer wall clamping rods 4 to move synchronously toward the circumferential outer wall of the cylinder blank.

[0047] After the outer wall clamping rod 4 clamps the cylinder blank, it moves toward the inner support chamfering part 1, and then the inner support chamfering part 1 fixes the inner wall of the cylinder blank. If the pressure value detected by the pressure sensor 5 exceeds the preset range, it indicates that the concentricity of the cylinder blank is poor and it is unqualified. The unqualified cylinder blank will not be chamfered.

[0048] Reference Figure 3 The rod shifting mechanism 51 includes a movable gear ring 53 rotatably connected to the base block 3. The axis of the movable gear ring 53 is the same as the center line around which all the outer wall clamping rods 4 are wound. The base block 3 is detachably connected to a rod shifting motor 56 that drives the movable gear ring 53 to rotate through gear meshing. The rod shifting motor 56 is electrically connected to the controller 52. The inner ring of the movable gear ring 53 is evenly fixedly connected with a plurality of gear ring blocks 54 around its own axis. Each outer wall clamping rod 4 is fixedly connected with a clamping rod wedge 55. Each gear ring block 54 abuts against a corresponding clamping rod wedge 55. One end of the gear ring block 54 abuts against the inclined surface of the clamping rod wedge 55 is in an arc shape. The base block 3 is fixedly connected with a return spring 57 that forces the outer wall clamping rod 4 to move away from the axis of the movable gear ring 53 by opening a notch.

[0049] Reference Figure 1 and Figure 4The frame 58 is detachably connected to two material rail cylinders 44 electrically connected to the controller 52. The two material rail cylinders 44 power rods are detachably connected to the inclined material rails 45 at the proximal ends. When the cylinder blank is unqualified, the two inclined material rails 45 are close to each other, so that when the unqualified cylinder blank is put back on the lifting arc sleeve 41 and then moved down, the two ends of the cylinder blank will contact the upper end of the inclined surface of the inclined material rails 45, so that the unqualified cylinder blank rolls down along the inclined surface of the inclined material rails 45. The frame 58 is located at the bottom end of the inclined material rails 45 and is detachably connected to the return box 46 to receive the unqualified cylinder blanks falling from the inclined material rails 45. And the two inclined material rails 45 are fixedly connected to the side away from each other with side baffles 49, so that the cylinder blank can be stably rolled on the inclined material rails 45 and rolled into the return box 46, and the minimum spacing between the two side baffles 49 is also appropriately larger than the length of the cylinder blank.

[0050] Reference Figure 2 and Figure 4 The two side baffles 49 are connected with the push plate 31 in a sliding manner along the inclined direction of the inclined material rail 45. The two side baffles 49 are connected with the push screw 32 at the opposite sides. The push screw 32 is penetrated and threadedly connected to the push plate 31. The two side baffles 49 are detachably connected with the screw motor 33 whose output shaft is coaxially detachably connected to the push screw 32. The upper end of the inclined material rail 45 is detachably connected with the distance sensor 34. The push plate 31 is penetrated with a distance sensor 34 for the distance sensor 34 to face the cylinder blank. The plate mouth 35 of the part, the distance sensor 34 and the screw motor 33 are electrically connected to the controller 52, so that when the cylinder blank is tilted on the inclined material rail 45 and the end face of the cylinder blank hits the side baffle 49 and cannot roll down smoothly, the distance value detected by the distance sensor 34 does not change within a predetermined time. At this time, the controller 52 will operate the screw motor 33 to make the push plate 31 move downward along the inclined direction of the inclined material rail 45, so as to push the cylinder blank off the inclined material rail 45 smoothly.

[0051] The implementation principle of a cylinder processing equipment in an embodiment of the present application is: unqualified cylinder blanks are not chamfered, and only qualified cylinder blanks are chamfered, so that the chamfering quality is not easily affected.

[0052] The embodiment of the present application also discloses a cylinder barrel processing method, which specifically includes the following steps.

[0053] Step 1: Place the cylinder blank on a set of end arc blocks 43, and the chain motor 48 drives the cylinder blank to move to a position facing the proximity sensor 47;

[0054] Step 2, the lifting cylinder 59 drives the cylinder blank to move up a predetermined distance;

[0055] Step 3, extending the cylinder 2 drives the base block 3 to move a predetermined distance toward the cylinder blank;

[0056] Step 4, the rod shifting motor 56 drives the movable gear ring 53 to rotate so that all the outer wall clamping rods 4 move toward the cylinder blank until the pressure values ​​detected by all the pressure sensors 5 reach a predetermined value;

[0057] Step 5, the extension cylinder 2 drives the base block 3 to move a predetermined distance toward the inner support chamfered portion 1;

[0058] Step 6, the inner support chamfered portion 1 is pressed against the inner wall of the end of the cylinder blank away from the extension cylinder 2. If the pressure value detected by the pressure sensor 5 increases and exceeds the predetermined range after the inner support chamfered portion 1 is fixed to the cylinder blank, the corresponding cylinder blank is unqualified; if the pressure value detected by the pressure sensor 5 is within the predetermined range after the inner support chamfered portion 1 is fixed to the cylinder blank, the corresponding cylinder blank is qualified;

[0059] Step 7: The qualified cylinder blank is chamfered by the inner support chamfering part 1 and cut into pieces;

[0060] Step 8, the unqualified cylinder blank is first released by the inner support chamfered part 1, and the extension cylinder 2 puts the unqualified cylinder blank back onto the lifting arc sleeve 41, and then the material rail cylinder 44 makes the two inclined material rails 45 close to each other, and then the unqualified cylinder blank falls onto the two inclined material rails 45 during the downward movement and enters into the return box 46.

[0061] The implementation principle of a cylinder processing method in an embodiment of the present application is: unqualified cylinder blanks are not chamfered, and only qualified cylinder blanks are chamfered, so that the chamfering quality is not easily affected.

[0062] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cylinder barrel processing method, characterized in that: A cylinder processing device is used, the cylinder processing device comprising an inner support chamfering portion (1) for abutting and fixing the circumferential inner wall of a cylinder blank and chamfering the circumferential outer wall of the cylinder blank, and also comprising an extension cylinder (2), a base block (3) driven by the extension cylinder (2) and capable of moving toward the cylinder blank along the axis direction of the cylinder blank, a plurality of outer wall clamping rods (4) evenly arranged around the axis of the inner support chamfering portion (1) fixing one end of the cylinder blank and slidably connected to the base block (3), a pressure sensor (5) provided on the outer wall clamping rod (4) and capable of abutting against the circumferential outer wall of the cylinder blank, a rod shifting mechanism (51) provided on the base block (3) and capable of causing all the outer wall clamping rods (4) to move synchronously toward the circumferential outer wall of the cylinder blank, and an electrical connection A controller (52) is provided for the pressure sensor (5) and the extension cylinder (2), the controller (52) can control the operation of the inner support chamfering part (1) and the rod shifting mechanism (51), and the outer wall clamping rods (4) are at least three; the rod shifting mechanism (51) comprises a movable gear ring (53) rotatably connected to the base block (3), a plurality of gear ring blocks (54) fixedly connected to the movable gear ring (53), a clamping rod wedge block (55) fixedly connected to the outer wall clamping rod (4) and capable of abutting against the gear ring block (54), a rod shifting motor (56) driving the movable gear ring (53) to rotate and electrically connected to the controller (52), and a return spring (57) forcing the outer wall clamping rod (4) to move away from the axis of the cylinder blank, and the gear ring block (54) moves along with the movable gear ring. The rotation of (53) can push the clamp rod wedge block (55) to move toward the axis of the cylinder blank; the gear ring block (54) contacts one end of the clamp rod wedge block (55) and is in an arc surface; the extension cylinder (2) is connected to a fixed frame (58), and the frame (58) is provided with a lifting cylinder (59) electrically connected to the controller (52), and the power rod of the lifting cylinder (59) is detachably connected to a lifting arc sleeve (41) that fits the circumferential outer wall of the cylinder blank; on one side of the frame (58), there is a conveying chain frame (42) with a chain arranged inside, and the chain in the conveying chain frame (42) is detachably connected to an array of end arc blocks (43) with two in each group for placing the cylinder blank, and the conveying chain frame (42) is provided so that The chain motor (48) for transmitting the end arc block (43) and the lifting arc sleeve (41) are directly opposite to the space between the two end arc blocks (43) of the same group; the transmission chain frame (42) is provided with a proximity sensor (47) directly opposite to the cylinder blank driven by the lifting arc sleeve (41), and the proximity sensor (47) is electrically connected to the controller (52); the frame (58) is provided with two material rail cylinders (44) electrically connected to the controller (52), and the power rods of the two material rail cylinders (44) are detachably connected to the inclined material rail (45) for rolling down the unqualified cylinder blank, and the frame (58) is detachably connected to the bottom end of the inclined material rail (45) with a return box (46) for receiving the unqualified cylinder blank;The side of the inclined material rail (45) is fixedly connected with a side baffle (49) close to the end of the cylinder blank, the side baffle (49) is slidably connected with a push plate (31) capable of pushing the cylinder blank toward the return box (46), the side baffle (49) is rotatably connected with a push screw (32) threadedly connected to the push plate (31), the side baffle (49) is provided with a screw motor (33) driving the push screw (32) to rotate and electrically connected to a controller (52); the inclined material rail (45) is provided with a distance sensor (34) facing the cylinder blank on the inclined material rail (45), the distance sensor (34) is electrically connected to the controller (52), and a plate opening (35) is opened through the push plate (31), and the plate opening (35) is located on the connection line between the distance sensor (34) and the cylinder blank on the inclined material rail (45); The specific steps include: Step 1, placing the cylinder blank on a set of end arc blocks (43), and the chain motor (48) drives the cylinder blank to move to a position directly opposite to the proximity sensor (47); Step 2, the lifting cylinder (59) drives the cylinder blank to move upward a predetermined distance; Step 3, the extension cylinder (2) drives the base block (3) to move a predetermined distance toward the cylinder blank; Step 4: The rod shifting motor (56) drives the movable gear ring (53) to rotate so that all the outer wall clamping rods (4) move toward the cylinder blank until the pressure values ​​detected by all the pressure sensors (5) reach a predetermined value; Step 5, the extension cylinder (2) drives the base block (3) to move a predetermined distance toward the inner support chamfered portion (1); Step 6, the inner support chamfered portion (1) is pressed against the inner wall of the end of the cylinder blank away from the extension cylinder (2), if the pressure value detected by the pressure sensor (5) increases and exceeds a predetermined range after the inner support chamfered portion (1) completes the fixing of the cylinder blank, the corresponding cylinder blank is unqualified; if the pressure value detected by the pressure sensor (5) is within the predetermined range after the inner support chamfered portion (1) completes the fixing of the cylinder blank, the corresponding cylinder blank is qualified; Step 7: The qualified cylinder blank is chamfered by the inner support chamfering part (1) and cut into pieces; Step 8: The unqualified cylinder blank is first released from the inner support chamfer (1), and the extension cylinder (2) puts the unqualified cylinder blank back onto the lifting arc sleeve (41). Then, the material rail cylinder (44) brings the two inclined material rails (45) closer together, and then the unqualified cylinder blank falls onto the two inclined material rails (45) during the downward movement and enters the return box (46).

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