A sleeve stretching device

Abstract

A kind of casing pipe stretching device belongs to casing pipe processing equipment technical field;Including equipment box, the left and right sides of the equipment box are provided with first power cabinet and second power cabinet respectively, first power cabinet and second power cabinet are formed with cavity between, the inside of the cavity is provided with demoulding mechanism and two sets of positioning device respectively, the top of demoulding mechanism and two sets of positioning device is connected on equipment box;The present application is provided with double-station operating table, it is equipped with two sets of loading structure by being provided with on top, by the rotation of the turntable of bottom, so that the processing operation of double-station can be realized quickly, when one station is processed, another station can be loaded and handled, greatly speed up the efficiency of entire processing, then by being provided with two sets of positioning hole on the tray, cooperate bottom and be provided with two sets of positioning from thereby can realize positioning effect to the rotation of entire turntable, increase the accuracy when the entire device processes.

Description

Technical Field

[0001] This invention belongs to the technical field of sleeve processing equipment, specifically relating to a sleeve stretching device. Background Technology

[0002] Machining is the process of cutting material (usually metal) into the desired final shape and size through a controlled material removal process. Processes with this common theme are collectively referred to as subtractive manufacturing, in contrast to additive manufacturing, which uses controlled material addition. The exact meaning of the "controlled" part in the definition may vary, but it generally means the use of machine tools.

[0003] In actual processing, single-sleeve tubes are characterized by slow processing efficiency at a single workstation, which also greatly reduces the efficiency of picking up and taking down the workpiece during processing, resulting in very low overall work efficiency. Summary of the Invention

[0004] The present invention mainly addresses the technical problems existing in the prior art by providing a sleeve stretching device.

[0005] The above-mentioned technical problem of the present invention is mainly solved by the following technical solution: a sleeve stretching device, including an equipment box, a first power cabinet and a second power cabinet are respectively arranged on the left and right sides of the equipment box, a cavity is formed between the first power cabinet and the second power cabinet, a demolding mechanism and two sets of positioning devices are respectively arranged inside the cavity, the tops of the demolding mechanism and the two sets of positioning devices are all connected to the equipment box, the two sets of positioning devices are located on the rear side of the demolding mechanism, a first sensing device is arranged at the front end of one set of positioning devices, a second sensing device is arranged on one side of the demolding mechanism, a base plate is arranged on the top of the equipment box, and the base plate... A stamping cabinet is installed at the top, and a stamping cavity is formed in the middle of the stamping cabinet. A stamping device is installed in the stamping cavity and is connected to the stamping cabinet at the top. A double-station operating platform is installed in the middle of the top of the base plate. The tops of the demolding mechanism and the two sets of positioning devices are connected to the double-station operating platform. A power mechanism is installed on one side of the bottom of the double-station operating platform. One end of the power mechanism is inserted into the second power cabinet. The double-station operating platform is located below the stamping device. A receiving plate is installed at the front end of the double-station operating platform. Both sides of the receiving plate are connected to the equipment box. A control switch is installed on one side of the base plate.

[0006] Preferably, the stamping device includes a first equipment plate, a first hydraulic cylinder, a buffer telescopic rod, a second equipment plate, and a stamping die. The first hydraulic cylinder is disposed inside the stamping cabinet, and its output end extends downward through the stamping cabinet. The first equipment plate is disposed at the bottom of the first hydraulic cylinder via a hinged seat. The buffer telescopic rods are disposed on the left and right sides of the top of the first equipment plate, and the tops of the two buffer telescopic rods are connected to the top of the stamping cabinet. The bottoms of the two buffer telescopic rods extend downward through the first equipment plate to its lower part. The second equipment plate is disposed at the bottom of the two buffer telescopic rods. The stamping die is disposed at the top of the second equipment plate, and its top extends through the second equipment plate and is connected to the first equipment plate. A first limiting rod is disposed on both sides of the top of the second equipment plate, and the top of the first limiting rod is slidably connected to the first equipment plate.

[0007] Preferably, the dual-station operating table includes a third equipment plate, a turntable, a fixed base, a top mold panel, a mounting head, a second limit rod, a main shaft, a fourth equipment plate, and a first protective sleeve. The third equipment plate is located on top of the base plate, and the turntable is located on top of the third equipment plate. Two loading structures are arranged opposite each other on the top of the turntable, and two positioning holes are opened on the top of the turntable. The two loading structures and positioning holes are arranged in a cross shape. The main shaft is located at the bottom center of the turntable, and the bottom end of the main shaft passes through the third equipment plate downwards. The fourth equipment plate is sleeved on the surface of the main shaft. The bottom of the main shaft is connected to the first protective sleeve, and a gear is provided on the bottom surface of the main shaft. The gear is located inside the first protective sleeve, and part of the surface of the gear passes through the first protective sleeve. The surface of the gear meshes with the power mechanism.

[0008] Preferably, the loading structure includes a fixed base, a top mold panel, a mounting head, and a second limiting rod. The fixed base is fixedly connected to the top of the turntable, and a pressure block is provided on one side of the fixed base. The top mold panel is located on the top of the fixed base, and a plurality of second limiting rods are located at the bottom of the top mold panel. The bottom ends of the plurality of second limiting rods simultaneously penetrate the fixed base, the turntable, and the third equipment plate, and the bottom of the second limiting rods are interconnected with the demolding mechanism. The mounting head is connected to the center of the top of the fixed base and is slidably disposed relative to the top mold panel.

[0009] Preferably, the top of the receiving plate has two discharge cavities, and a connecting groove for connecting the two discharge cavities is provided between the two discharge cavities, and a through hole is provided in the middle of the connecting groove.

[0010] Preferably, the demolding mechanism includes a mounting frame, a second hydraulic cylinder, a second protective sleeve, a connecting rod, and a stamping plate. The mounting frame is located at the bottom of the cavity. The second hydraulic cylinder is located at the bottom of the mounting frame with its output end extending upwards. The second protective sleeve is located at the top of the mounting frame. The output end of the second hydraulic cylinder is inserted into the interior of the second protective sleeve. A connecting rod is located at the top of the second hydraulic cylinder and is located inside the second protective sleeve. A groove is formed on one side of the second protective sleeve. A first sensing rod is located on one side of the connecting rod. One end of the first sensing rod passes through the groove and is positioned opposite to a second sensing device. The stamping plate is located at the top of the connecting rod, and the top of the stamping plate is connected to multiple second limiting rods.

[0011] Preferably, the second sensing device includes a second fixing plate and a second sensing head, the second fixing plate being disposed on the top side of the mounting bracket, and the second sensing head being disposed on the second fixing plate.

[0012] Preferably, the power mechanism includes a third hydraulic cylinder and a rack. One end of the third hydraulic cylinder is inserted into the second power cabinet, and the rack is disposed on the output end of the third hydraulic cylinder and is connected to the dual-station operating platform.

[0013] Preferably, the positioning device includes a fifth equipment plate, a third protective sleeve, a fourth hydraulic cylinder, a limiting protrusion, and an extension head. The third protective sleeve is disposed at the bottom of the dual-station operating table, the fifth equipment plate is disposed at the bottom of the third protective sleeve, the fourth hydraulic cylinder is disposed at the bottom of the fifth equipment plate, and its output end extends through the fifth equipment plate into the third protective sleeve. The limiting protrusion is disposed on the output end of the fourth hydraulic cylinder, and the extension head is disposed at the bottom of the fourth hydraulic cylinder. A second sensing rod is disposed on the surface of the extension head, and the second sensing rod is disposed corresponding to the first sensing device.

[0014] The beneficial effects of this invention are as follows:

[0015] 1. By setting up a dual-station operating table, which has two loading structures on the top and a turntable at the bottom, dual-station processing can be quickly realized. When one station is processing, the other station can be loading, which greatly speeds up the overall processing efficiency. Furthermore, by setting two sets of positioning holes on the loading tray, together with two sets of positioning holes at the bottom, the rotation of the entire turntable can be positioned to increase the accuracy of the entire device during processing.

[0016] 2. By setting a demolding mechanism at the bottom, the demolding mechanism can cooperate with the two loading structures at the top. The stamping plate set at the output end of the demolding mechanism can move the top mold panel upward through multiple second limit rods at the bottom of the loading mechanism, thereby realizing the demolding of the workpiece and facilitating the dropping of materials.

[0017] 3. By setting a receiving plate on the top of the dual-station operating table, and setting through holes for corresponding mounting heads on the receiving plate, after the workpiece is demolded, the material can be placed in the discharge chamber on one side for collection, while the workpiece to be processed can be placed in the discharge chamber on the other side, which facilitates the processing and collection of the entire workpiece. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a front structural diagram of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram of a dual-station operating table of the present invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the demolding mechanism of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the positioning device of the present invention;

[0023] Figure 6 This is a schematic diagram of the top structure of the receiving plate of the present invention.

[0024] In the diagram: 1. Equipment box; 11. First power cabinet; 12. Second power cabinet; 13. Cavity; 14. Control switch; 21. Stamping cabinet; 22. Base plate; 23. Stamping cavity; 3. Stamping device; 31. First equipment plate; 32. Buffer telescopic rod; 33. First hydraulic cylinder; 34. Second equipment plate; 35. Stamping die; 36. First limit rod; 4. Dual-station operating table; 41. Third equipment plate; 42. Turntable; 43. Fixed seat; 44. Top die panel; 45. Mounting head; 46. Second limit rod; 47. Pressure block; 48. Main shaft; 49. Fourth equipment plate; 410. First protective sleeve; 411. Gear; 41 2. Positioning hole; 5. Receiving plate; 51. Discharging chamber; 52. Connecting groove; 53. Through hole; 6. First sensing device; 61. First fixing plate; 62. First sensing head; 7. Demolding mechanism; 71. Mounting bracket; 72. Second hydraulic cylinder; 73. Second protective sleeve; 74. Connecting rod; 75. First sensing rod; 76. Second fixing plate; 77. Second sensing head; 78. Stamping plate; 79. Slide groove; 8. Power mechanism; 81. Third hydraulic cylinder; 82. Rack; 9. Positioning device; 91. Fifth equipment plate; 92. Third protective sleeve; 93. Fourth hydraulic cylinder; 94. Limiting protrusion; 95. Extension head; 96. Second sensing rod. Detailed Implementation

[0025] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0026] Example: A sleeve tensioning device, such as Figures 1-6 As shown, the system includes an equipment box 1. A first power cabinet 11 and a second power cabinet 12 are respectively arranged on the left and right sides of the equipment box 1. A cavity 13 is formed between the first power cabinet 11 and the second power cabinet 12. A demolding mechanism 7 and two sets of positioning devices 9 are respectively arranged inside the cavity 13. The tops of the demolding mechanism 7 and the two sets of positioning devices 9 are connected to the equipment box 1. The two sets of positioning devices 9 are located behind the demolding mechanism 7. A first sensing device 6 is arranged at the front end of one set of positioning devices 9, and a second sensing device is arranged on one side of the demolding mechanism 7. A base plate 22 is arranged on the top of the equipment box 1, and a stamping cabinet 21 is arranged on the top of the base plate 22. A stamping cavity 23 is formed in the middle of the bottom plate 22. A stamping device 3 is installed in the stamping cavity 23. The stamping device 3 is connected to the stamping cabinet 21 at the top. A double-station operating table 4 is installed in the middle of the top of the bottom plate 22. The tops of the demolding mechanism 7 and the two sets of positioning devices 9 are connected to the double-station operating table 4. A power mechanism 8 is installed on one side of the bottom of the double-station operating table 4. One end of the power mechanism 8 is inserted into the second power cabinet 12. The double-station operating table 4 is located below the stamping device 3. A receiving plate 5 is installed at the front end above the double-station operating table 4. The two sides of the receiving plate 5 are connected to the equipment box 1. A control switch 14 is installed on one side of the bottom plate 22.

[0027] The stamping device 3 includes a first equipment plate 31, a first hydraulic cylinder 33, a buffer telescopic rod 32, a second equipment plate 34, and a stamping die 35. The first hydraulic cylinder 33 is located inside the stamping cabinet 21, and its output end extends downward through the stamping cabinet 21. The first equipment plate 31 is located at the bottom of the first hydraulic cylinder 33 via a hinge seat. The buffer telescopic rod 32 is located on the left and right sides of the top of the first equipment plate 31. The tops of the two buffer telescopic rods 32 are connected to the top of the stamping cabinet 21, and the bottoms of the two buffer telescopic rods 32 extend downward through the first equipment plate 31 to its lower part. The second equipment plate 34 is located at the bottom of the two buffer telescopic rods 32. The stamping die 35 is located at the top of the second equipment plate 34, and its top extends through the second equipment plate 34 and is connected to the first equipment plate 31. The tops of the second equipment plate 34 are provided with first limiting rods 36 on both sides, and the tops of the first limiting rods 36 are slidably connected to the first equipment plate 31.

[0028] The dual-station operating table 4 includes a third equipment plate 41, a turntable 42, a fixed base 43, a top mold panel 44, a mounting head 45, a second limit rod 46, a spindle 48, a fourth equipment plate 49, and a first protective sleeve 410. The third equipment plate 41 is located on top of the base plate 22, and the turntable 42 is located on top of the third equipment plate 41. Two loading structures are arranged opposite each other on the top of the turntable 42, and two positioning holes 412 are opened on the top of the turntable 42. The two loading structures and the positioning holes 412 are arranged in a cross shape. The spindle 48 is located at the bottom center of the turntable 42, and the bottom end of the spindle 48 penetrates through the third equipment plate 41 and extends downward. The fourth equipment plate 49 is sleeved on the surface of the spindle 48, and the bottom of the spindle 48 is connected to the first protective sleeve 410. A gear 411 is provided on the bottom surface of the spindle 48. 11 is set inside the first protective sleeve 410, and part of the surface of the gear 411 penetrates the first protective sleeve 410. The surface of the gear 411 meshes with the power mechanism 8. The loading structure includes a fixed seat 43, a top mold panel 44, a mounting head 45, and a second limiting rod 46. The fixed seat 43 is fixedly connected to the top of the turntable 42. A pressure block 47 is provided on one side of the fixed seat 43. The top mold panel 44 is set on the top of the fixed seat 43. Multiple second limiting rods 46 are set at the bottom of the top mold panel 44. The bottom ends of the multiple second limiting rods 46 penetrate the fixed seat 43, the turntable 42, and the third equipment plate 41. The bottom of the second limiting rods 46 is connected to the demolding mechanism 7. The mounting head 45 is connected to the center of the top of the fixed seat 43 and slides against the top mold panel 44.

[0029] The top of the receiving plate 5 has two discharge cavities 51, and a connecting groove 52 is provided between the two discharge cavities 51 to connect them. A through hole 53 is provided in the middle of the connecting groove 52. The through hole 53 is located directly above the mounting head 45 to facilitate the collection of the workpiece.

[0030] The demolding mechanism 7 includes a mounting frame 71, a second hydraulic cylinder 72, a second protective sleeve 73, a connecting rod 74, and a stamping plate 78. The mounting frame 71 is located at the bottom of the cavity 13. The second hydraulic cylinder 72 is located at the bottom of the mounting frame 71 with its output end extending upwards. The second protective sleeve 73 is located at the top of the mounting frame 71. The output end of the second hydraulic cylinder 72 is inserted into the second protective sleeve 73. A connecting rod 74 is located at the top of the second hydraulic cylinder 72 and is located inside the second protective sleeve 73. A groove 79 is provided on one side of the second protective sleeve 73. A first sensing rod 75 is provided on one side of the connecting rod 74. One end of the first sensing rod 75 passes through the groove 79 and is positioned opposite to the second sensing device. The stamping plate 78 is located at the top of the connecting rod 74. The top of the stamping plate 78 is connected to multiple second limiting rods 46. The second sensing device includes a second fixing plate 76 and a second sensing head 77. The second fixing plate 76 is located on the top side of the mounting frame 71, and the second sensing head 77 is located on the second fixing plate 76.

[0031] The power mechanism 8 includes a third hydraulic cylinder 81 and a rack 82. One end of the third hydraulic cylinder 81 is inserted into the second power cabinet 12. The rack 82 is located on the output end of the third hydraulic cylinder 81 and is connected to the dual-station operating table 4.

[0032] The positioning device 9 includes a fifth equipment plate 91, a third protective sleeve 92, a fourth hydraulic cylinder 93, a limiting protrusion 94, and an extension head 95. The third protective sleeve 92 is located at the bottom of the dual-station operating table 4, the fifth equipment plate 91 is located at the bottom of the third protective sleeve 92, the fourth hydraulic cylinder 93 is located at the bottom of the fifth equipment plate 91, and its output end extends through the fifth equipment plate 91 into the third protective sleeve 92. The limiting protrusion 94 is located on the output end of the fourth hydraulic cylinder 93, and the extension head 95 is located at the bottom of the fifth hydraulic cylinder. A second sensing rod 96 is provided on the surface of the extension head 95, and the second sensing rod 96 is correspondingly arranged with the first sensing device 6.

[0033] The principle of this invention: After the workpiece to be processed is placed into the feeding cavity 51 on one side of the top of the receiving plate 5, the workpiece is then placed into the top of the mounting head 45 at the bottom through the through hole 53. Then, the control switch 14 on one side is turned on to control the entire dual-station operating table 4 to start working. The third oil cylinder 81 located on one side of its bottom is turned on, pushing the rack 82 at the output end to move to one side. The rack 82 drives the main shaft 48 of the connecting gear 411 to start rotating. The turntable 42, which is coaxially connected to the gear 411, starts to rotate synchronously. The turntable 42 rotates one station distance. At this time, the loading structure containing the workpiece is rotated to the bottom of the stamping device 3.

[0034] At this time, the two positioning devices 9 located below the dual-station operating table 4 are activated. The fourth oil cylinder 93 drives the limiting protrusion 94 at the output end to move upward, so that the top end is inserted into the positioning holes 412 on both sides of the turntable 42 to achieve positioning of the turntable 42. Then, the upper stamping device 3 is activated, so that the stamping die 35 is stretched downward to increase the length of the workpiece. After the stamping device 3 is retracted, the two sets of positioning devices 9 fall downward. After the turntable 42 rotates again to complete the rotation of one station, the loading structure containing the workpiece moves to the top of the demolding mechanism 7.

[0035] When the demolding mechanism 7 is activated, it pushes the connecting rod 74 upward via the second hydraulic cylinder 72 at the bottom. The connecting rod 74 drives the stamping plate 78 at the top to move upward. The stamping plate 78 moves upward against the multiple second limiting rods 46 extending to the bottom of the fixed base 43. The top mold panel 44 at the top of the multiple second limiting rods 46 moves upward, thereby demolding the workpiece mounted on the top of the mounting head 45 through the top mold panel 44. At the same time, the second sensing device located on one side of the demolding mechanism 7 can control the demolding height by adjusting the distance between the two second sensing heads 77, thereby achieving effective demolding.

[0036] Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and many variations are possible. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention should be considered within the protection scope of the present invention.

Claims

1. A sleeve tensioning device, comprising an equipment box (1), characterized in that: The equipment box (1) is provided with a first power cabinet (11) and a second power cabinet (12) on its left and right sides respectively. A cavity (13) is formed between the first power cabinet (11) and the second power cabinet (12). A demolding mechanism (7) and two sets of positioning devices (9) are respectively provided inside the cavity (13). The tops of the demolding mechanism (7) and the two sets of positioning devices (9) are connected to the equipment box (1). The two sets of positioning devices (9) are located behind the demolding mechanism (7). A first sensing device (6) is provided at the front end of one set of positioning devices (9). A second sensing device is provided on one side of the demolding mechanism (7). A bottom is provided on the top of the equipment box (1). The base plate (22) has a stamping cabinet (21) on its top. A stamping cavity (23) is formed in the middle of the stamping cabinet (21). A stamping device (3) is installed in the stamping cavity (23). The stamping device (3) is connected to the stamping cabinet (21) on the top. A double-station operating table (4) is installed in the middle of the top of the base plate (22). The tops of the demolding mechanism (7) and the two sets of positioning devices (9) are connected to the double-station operating table (4). The demolding mechanism (7) includes a mounting frame (71), a second oil cylinder (72), a second protective sleeve (73), a connecting rod (74), and a stamping plate (78). The mounting frame (71) is set in an empty space. At the bottom of cavity (13), the second hydraulic cylinder (72) is located at the bottom of mounting bracket (71) with its output end extending upwards. The second protective sleeve (73) is located at the top of mounting bracket (71). The output end of the second hydraulic cylinder (72) is inserted into the second protective sleeve (73). A connecting rod (74) is located at the top of the second hydraulic cylinder (72). The connecting rod (74) is located inside the second protective sleeve (73). A sliding groove (79) is provided on one side of the second protective sleeve (73). A first sensing rod (75) is provided on one side of the connecting rod (74). One end of the first sensing rod (75) passes through the sliding groove (79) and is positioned opposite to the second sensing device. A power mechanism (8) is provided on one side of the bottom of the dual-station operating table (4). One end of the power mechanism (8) is inserted into the second power cabinet (12). The dual-station operating table (4) is located below the stamping device (3). A receiving plate (5) is provided at the front end of the upper part of the dual-station operating table (4). The two sides of the receiving plate (5) are connected to the equipment box (1). Two discharge cavities (51) are opened on the top of the receiving plate (5). A connecting groove (52) for connecting the two discharge cavities (51) is opened between the two discharge cavities (51). A through hole (53) is opened in the middle of the connecting groove (52). A control switch (14) is provided on one side of the bottom plate (22).

2. The sleeve stretching device according to claim 1, characterized in that: The stamping device (3) includes a first equipment plate (31), a first hydraulic cylinder (33), a buffer telescopic rod (32), a second equipment plate (34), and a stamping die (35). The first hydraulic cylinder (33) is located inside the stamping cabinet (21), and its output end extends downward through the stamping cabinet (21). The first equipment plate (31) is mounted at the bottom of the first hydraulic cylinder (33) via a hinge seat. The buffer telescopic rod (32) is located on the left and right sides of the top of the first equipment plate (31), and the tops of the two buffer telescopic rods (32) are connected to the stamping cabinet (21). The tops of the two buffer telescopic rods (32) are connected to each other, and the bottoms of the two buffer telescopic rods (32) extend downward through the first equipment plate (31) to its lower part. The second equipment plate (34) is set at the bottom of the two buffer telescopic rods (32). The stamping die (35) is set at the top of the second equipment plate (34) and its top extends through the second equipment plate (34) and is connected to the first equipment plate (31). The tops of the second equipment plate (34) are provided with first limiting rods (36) on both sides. The tops of the first limiting rods (36) are slidably connected to the first equipment plate (31).

3. The sleeve stretching device according to claim 1, characterized in that: The dual-station operating platform (4) includes a third equipment plate (41), a turntable (42), a fixed base (43), a top mold panel (44), a mounting head (45), a second limiting rod (46), a main shaft (48), a fourth equipment plate (49), and a first protective sleeve (410). The third equipment plate (41) is located on the top of the base plate (22), and the turntable (42) is located on the top of the third equipment plate (41). The top of the turntable (42) has two opposite loading structures, and the top of the turntable (42) has two positioning holes (412). The two loading structures and the positioning holes (412) are arranged in a cross shape. The shaft (48) is located at the bottom center of the turntable (42). The bottom end of the main shaft (48) passes through the third equipment plate (41) and is set downwards. The fourth equipment plate (49) is sleeved on the surface of the main shaft (48). The first protective sleeve (410) is sleeved on the bottom of the fourth equipment plate (49) and is located on the outer surface of the main shaft (48). A gear (411) is provided on the bottom surface of the main shaft (48). The gear (411) is located inside the first protective sleeve (410), and part of the surface of the gear (411) passes through the first protective sleeve (410). The surface of the gear (411) meshes with the power mechanism (8).

4. The sleeve stretching device according to claim 3, characterized in that: The loading structure includes a fixed base (43), a top mold panel (44), a mounting head (45), and a second limiting rod (46). The fixed base (43) is fixedly connected to the top of the turntable (42). A pressure block (47) is provided on one side of the fixed base (43). The top mold panel (44) is located on the top of the fixed base (43). Multiple second limiting rods (46) are located at the bottom of the top mold panel (44). The bottom ends of the multiple second limiting rods (46) pass through the fixed base (43), the turntable (42), and the third equipment plate (41). The bottom of the second limiting rods (46) is connected to the demolding mechanism (7). The mounting head (45) is connected to the center of the top of the fixed base (43) and slides against the top mold panel (44).

5. The sleeve stretching device according to claim 4, characterized in that: The stamping plate (78) is disposed on the top of the connecting rod (74), and the top of the stamping plate (78) is connected to a plurality of second limiting rods (46).

6. The sleeve stretching device according to claim 5, characterized in that: The second sensing device includes a second fixing plate (76) and a second sensing head (77). The second fixing plate (76) is disposed on the top side of the mounting bracket (71), and the second sensing head (77) is disposed on the second fixing plate (76).

7. The sleeve stretching device according to claim 1, characterized in that: The power mechanism (8) includes a third cylinder (81) and a rack (82). One end of the third cylinder (81) is inserted into the second power cabinet (12). The rack (82) is set on the output end of the third cylinder (81) and is connected to the dual-station operating table (4).

8. The sleeve stretching device according to claim 1, characterized in that: The positioning device (9) includes a fifth equipment plate (91), a third protective sleeve (92), a fourth hydraulic cylinder (93), a limiting protrusion (94), and an extension head (95). The third protective sleeve (92) is located at the bottom of the dual-station operating table (4). The fifth equipment plate (91) is located at the bottom of the third protective sleeve (92). The fourth hydraulic cylinder (93) is located at the bottom of the fifth equipment plate (91), and its output end extends through the fifth equipment plate (91) into the third protective sleeve (92). The limiting protrusion (94) is located on the output end of the fourth hydraulic cylinder (93). The extension head (95) is located at the bottom of the fourth hydraulic cylinder (93). A second sensing rod (96) is provided on the surface of the extension head (95). The second sensing rod (96) is correspondingly arranged with the first sensing device (6).

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