Equipment capable of automatically polishing copper alloy bar

Abstract

The utility model relates to equipment capable of automatically polishing copper alloy bars, which comprises an equipment frame body, a conveying mechanism used for conveying a polishing mechanism is arranged on the surface of the equipment frame body, one side of the conveying mechanism is in transmission connection with a driving mechanism, and the polishing mechanism is used for polishing the copper alloy bars. A first limiting mechanism capable of rotating and a second limiting mechanism capable of moving are further arranged on the surface of the equipment frame body, the second limiting mechanism can clamp or loosen the copper alloy bar relative to the position change of the first limiting mechanism, and a height adjusting mechanism for adjusting the height of the copper alloy bar is arranged at the bottom of the equipment frame body; the conveying mechanism can pull the whole polishing mechanism to change the position in the moving process, automatic polishing of the surface of the copper alloy bar from one end to the other end through the polishing mechanism is successfully achieved in the moving process, and convenience is brought to the production process.

Description

Technical Field

[0001] This utility model relates to the field of polishing equipment technology, specifically to a device capable of automatically polishing copper alloy rods. Background Technology

[0002] Copper alloy rods for electrode materials are functional conductive materials made with copper as the base and the addition of elements such as chromium, zirconium, and nickel. They possess high conductivity, resistance to high-temperature softening, and resistance to arc erosion, and are widely used in fields such as electrical discharge machining and resistance welding electrodes. The processing steps mainly include alloy melting, hot extrusion forming, solution aging heat treatment, and cold drawing finishing. Finally, polishing is required to improve surface quality and meet application requirements.

[0003] Polishing the copper rod is a crucial step in ensuring electrode performance during processing. Because copper alloy surfaces are prone to oxidation, forming an insulating film, and rough surfaces during electrical discharge machining (EDM) exacerbate arc loss, polishing removes fine scratches, burrs, and oxide layers from the rod surface, resulting in a smoother and more uniform conductive contact surface. Polishing processes are divided into mechanical polishing and chemical polishing. Mechanical polishing uses abrasive belts or cloth wheels with polishing paste to achieve a mirror-like surface through high-speed friction. Strict control of pressure, temperature, and time is essential during polishing to avoid excessive material removal or intergranular corrosion. After polishing, the copper rod undergoes an anti-oxidation coating treatment, such as silver plating or passivation, and its surface finish and conductivity stability are tested to ensure high-efficiency and reliable performance during high-voltage discharge or high-frequency welding, extending the electrode's lifespan.

[0004] Application publication number CN119704010A discloses a copper tube polishing device and its usage method that facilitates the replacement of the polishing disc. According to its instruction manual and accompanying drawings, the polishing wheel is installed between a first positioning frame, a second positioning frame, and a fixed baffle. The polishing wheel is internally connected to a connecting shaft via protruding plates. The polishing wheel and the connecting shaft are coaxial. Two protruding plates are provided, and they are parallel to each other. This arrangement allows for stable positioning of the polishing wheel during device operation.

[0005] However, the solution has certain limitations: 1. The polishing wheel is always in a fixed state, which makes it impossible to polish the entire surface of the copper rod to be polished efficiently; 2. The copper rod to be polished is not effectively and stably restrained, which brings inconvenience to the polishing process. Summary of the Invention

[0006] This invention addresses the problems encountered in polishing copper rods by providing a device for automatically polishing copper alloy rods. During its movement, the conveyor drive belt can pull the entire conveyor support frame to change position via a sliding drive plate, successfully enabling the polishing mechanism to automatically polish the surface of the copper alloy rod from one end to the other during the movement.

[0007] The objective of this invention is achieved through the following technical solution: a device capable of automatically polishing copper alloy rods, comprising a device frame, the surface of which is provided with a conveying mechanism for conveying a polishing mechanism, a driving mechanism being connected to one side of the conveying mechanism, the polishing mechanism being used to polish the copper alloy rods, the surface of which is also provided with a first limiting mechanism capable of rotation and a second limiting mechanism capable of displacement, the positional change of the second limiting mechanism relative to the first limiting mechanism being able to clamp or release the copper alloy rods, and a height adjustment mechanism for adjusting the height of the copper alloy rods being provided at the bottom of the device frame.

[0008] Preferably, the conveying mechanism includes a conveying guide rail, a conveying support frame, support rollers, a sliding drive plate, a conveying drive belt, and a conveying belt support assembly. The surface of the equipment frame is provided with a plurality of conveying guide rails, and the bottom of each conveying support frame is provided with a plurality of rotatable support rollers. Each support roller is adapted to the surface of the conveying guide rail. The surface of the conveying support frame is provided with a sliding drive plate, and the interior of the sliding drive plate is connected to a conveying drive belt capable of displacement. Both sides of the conveying drive belt are connected to the conveying belt support assembly, and the movement of the conveying drive belt can simultaneously drive the conveying support frame to change position.

[0009] Preferably, the conveyor belt support assembly includes several roller support plates, support rollers and conveyor belt drive wheels. Each roller support plate is disposed on the surface of the equipment frame, and support rollers are rotatably disposed between adjacent roller support plates. Each support roller is provided with a conveyor belt drive wheel on its surface, and the conveyor drive belt is sleeved and installed on the surface of the conveyor belt drive wheel.

[0010] Preferably, the drive mechanism includes a first drive motor, a first gear, a second gear, and a first chain. The first drive motor is mounted on the surface of the equipment frame. The first gear is connected to the end of the shaft of the first drive motor. At least one support roller shaft is also provided with a second gear. The first gear and the second gear are connected by the first chain.

[0011] Preferably, the polishing mechanism includes a polishing support frame, a first cylinder, guide columns, a second drive motor, a polishing wheel, and a protective cover. The polishing support frame has several guide columns on its surface, and each guide column is slidably connected to a support sleeve on the surface of the conveying support frame. The conveying support frame also has a first cylinder in its middle, and the piston rod of the first cylinder is connected to the bottom of the polishing support frame. The polishing support frame has a second drive motor on its side near the first limiting mechanism, and the end of the shaft of the second drive motor is connected to a polishing wheel. The polishing wheel is covered with a protective cover. This arrangement is for polishing the surface of the copper alloy rod.

[0012] Preferably, the first limiting mechanism includes several first rotating shaft support blocks, a first sleeve drive shaft, a first limiting sleeve, a third gear, a third drive motor, a fourth gear, and a second chain. Each first rotating shaft support block has a first sleeve drive shaft rotatably mounted inside. One end of the first sleeve drive shaft is connected to the first limiting sleeve. The end of the first limiting sleeve has a circular groove. The other end of the first sleeve drive shaft has a third gear. A third drive motor is also provided on one side of the bottom of the equipment frame. The fourth gear at the end of the third drive motor is connected to the third gear through a second chain drive.

[0013] Preferably, the second limiting mechanism includes a supporting slide plate, a second rotating shaft support block, a second sleeve drive shaft, a second limiting sleeve, and a second cylinder. The supporting slide plate is slidably connected to the surface of the equipment frame via a slide rail. A plurality of second rotating shaft support blocks are disposed on the surface of the supporting slide plate. Each second rotating shaft support block has a second sleeve drive shaft rotatably disposed inside. One end of the second sleeve drive shaft is connected to a rotatable second limiting sleeve. The end of the second limiting sleeve is provided with a circular groove. The other end of the second sleeve drive shaft is connected to the piston rod of the second cylinder.

[0014] Preferably, the height adjustment mechanism includes a lifting support frame, a lifting guide rod, a third cylinder, and a material placement block. The lifting support frame is slidably connected to the lifting guide rod inside. The bottom of the lifting support frame is equipped with a third cylinder. The piston rod of the third cylinder and the end of the lifting guide rod are both connected to a material placement block. The cross-section of the material placement block is V-shaped. This arrangement is for feeding the copper alloy rod to be polished.

[0015] Compared with the prior art, the present invention has the following advantages: 1. During the movement of the conveyor drive belt, the entire conveyor support frame can be moved and changed position by the sliding drive plate. During the movement, the polishing mechanism can automatically polish the surface of the copper alloy rod from one end to the other, which brings convenience to the production process; 2. The piston rod of the second cylinder drives the second limit sleeve to move and pushes and adjusts the position of the copper alloy rod in the axial direction until the gap between the first limit sleeve and the second limit sleeve becomes smaller, thereby locking the two ends of the copper alloy rod. In the subsequent polishing process, the first limit sleeve can also actively drive the copper alloy rod to be polished to rotate, which not only realizes automatic clamping, but also further improves the polishing effect. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2This is a partial perspective view of the present invention;

[0018] Figure 3 This is a perspective view of the present utility model;

[0019] Figure 4 For the present utility model in Figure 3 Enlarged view of region A in the image;

[0020] Figure 5 For the present utility model in Figure 3 Enlarged view of region B in the image;

[0021] Figure 6 This is a perspective view of the height adjustment mechanism in this utility model.

[0022] In the diagram, the markings are as follows: 1. Equipment frame; 2. Polishing mechanism; 21. Polishing support frame; 22. Guide column; 23. First cylinder; 24. Second drive motor; 25. Polishing wheel; 26. Protective cover; 3. Conveying mechanism; 31. Conveying guide rail; 32. Conveying support frame; 33. Support roller; 34. Sliding drive plate; 35. Conveying drive belt; 36. Conveying belt support assembly; 321. Support sleeve; 361. Roller support plate; 362. Support roller; 363. Conveying belt drive wheel; 4. Drive mechanism; 41. First drive motor; 42. First gear; 43. Second gear; 44. First chain; 5. First limiting mechanism; 51. First rotating shaft support block; 52. First sleeve drive shaft; 53. First limiting sleeve; 54. Third gear; 55. Third drive motor; 56. Fourth gear; 57. Second chain; 6. Second limiting mechanism; 61. Support slide plate; 62. Second rotating shaft support block; 63. Second sleeve drive shaft; 64. Second limiting sleeve; 65. Second cylinder; 7. Height adjustment mechanism; 71. Lifting support frame; 72. Lifting guide rod; 73. Third cylinder; 74. Material placement block. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0024] like Figure 1 and Figure 2 As shown, an automatic polishing device for copper alloy rods includes a device frame 1, and a conveying mechanism 3 for conveying a polishing mechanism 2 is provided on the surface of the device frame 1. The polishing mechanism 2 is used to polish the copper alloy rods.

[0025] The conveying mechanism 3 includes a conveying guide rail 31, a conveying support frame 32, support rollers 33, a sliding drive plate 34, a conveying drive belt 35, and a conveying belt support assembly 36. The surface of the equipment frame 1 is provided with a plurality of conveying guide rails 31. The bottom of each conveying support frame 32 is provided with a plurality of rotatable support rollers 33. Each support roller 33 is adapted to the surface of the conveying guide rail 31. The surface of the conveying support frame 32 is provided with a sliding drive plate 34. The interior of the sliding drive plate 34 is connected to a conveying drive belt 35 capable of displacement movement. The two sides of the conveying drive belt 35 are connected to the conveying belt support assembly 36. The movement of the conveying drive belt 35 can simultaneously drive the conveying support frame 32 to change position.

[0026] During its movement, the conveyor drive belt 35 can pull the entire conveyor support frame 32 to change position via the sliding drive plate 34. During the movement and position change of the conveyor support frame 32, the support rollers 33 slide on the surface of the conveyor guide rail 31. During the movement of the conveyor support frame 32, the polishing mechanism 2 polishes the surface of the copper alloy rod from one end to the other.

[0027] The conveyor belt support assembly 36 includes several roller support plates 361, support rollers 362, and conveyor belt drive wheels 363. Each roller support plate 361 is disposed on the surface of the equipment frame 1. Support rollers 362 are rotatably disposed between adjacent roller support plates 361. Each support roller 362 is provided with a conveyor belt drive wheel 363 on its surface. The conveyor drive belt 35 is sleeved and installed on the surface of the conveyor belt drive wheel 363.

[0028] The rotation of each conveyor belt drive wheel 363 can drive the conveyor drive belt 35 to move. During the rotation of the conveyor belt drive wheel 363, the support roller shaft 362 also rotates relative to the roller shaft support plate 361 and plays a supporting role.

[0029] In this embodiment, a drive mechanism 4 is connected to one side of the conveying mechanism 3. The drive mechanism 4 includes a first drive motor 41, a first gear 42, a second gear 43, and a first chain 44. The first drive motor 41 is mounted on the surface of the equipment frame 1. The first gear 42 is connected to the end of the shaft of the first drive motor 41. The surface of at least one support roller shaft 362 is also provided with a second gear 43. The first gear 42 and the second gear 43 are connected by the first chain 44.

[0030] The first drive motor 41's shaft rotates, driving the first gear 42 to move. The first gear 42 then drives the second gear 43 to rotate via the first chain 44. The second gear 43, in turn, drives the support roller shaft 362 to rotate. The conveyor belt drive wheel 363 on the support roller shaft 362 also rotates simultaneously.

[0031] Please continue to refer to this. Figure 2 The polishing mechanism 2 includes a polishing support frame 21, a first cylinder 23, a guide column 22, a second drive motor 24, a polishing wheel 25, and a protective cover 26. The polishing support frame 21 has a plurality of guide columns 22 on its surface. Each guide column 22 is slidably connected to a support sleeve 321 on the surface of a conveying support frame 32. The conveying support frame 32 also has a first cylinder 23 in the middle. The piston rod of the first cylinder 23 is connected to the bottom of the polishing support frame 21. The polishing support frame 21 has a second drive motor 24 on the side near the first limiting mechanism 5. The end of the rotating shaft of the second drive motor 24 is connected to the polishing wheel 25. The polishing wheel 25 is covered with a protective cover 26.

[0032] During the movement of the conveyor support frame 32, the shaft of the second drive motor 24 drives the polishing wheel 25 to rotate, and the polishing wheel 25 polishes and grinds the surface of the copper alloy rod. After polishing is completed, the piston rod of the first cylinder 23 extends upward, causing the entire polishing support frame 21 to rise, and the polishing wheel 25 can no longer contact the rod to be polished.

[0033] Please continue to refer to this. Figure 3 and Figure 4 The surface of the equipment frame 1 is also provided with a first limiting mechanism 5 capable of rotation and a second limiting mechanism 6 capable of displacement. The positional change of the second limiting mechanism 6 relative to the first limiting mechanism 5 can clamp or loosen the copper alloy rod.

[0034] The first limiting mechanism 5 includes several first rotating shaft support blocks 51, a first sleeve drive shaft 52, a first limiting sleeve 53, a third gear 54, a third drive motor 55, a fourth gear 56, and a second chain 57. Each first rotating shaft support block 51 has a first sleeve drive shaft 52 rotatably mounted inside. One end of the first sleeve drive shaft 52 is connected to the first limiting sleeve 53. The end of the first limiting sleeve 53 is provided with a circular groove. The other end of the first sleeve drive shaft 52 is provided with a third gear 54. The bottom side of the equipment frame 1 is also provided with a third drive motor 55. The fourth gear 56 at the end of the third drive motor 55 is connected to the third gear 54 through the second chain 57.

[0035] One end of the copper alloy rod to be polished is secured inside the circular groove of the first limiting sleeve 53. Meanwhile, the other end of the copper alloy rod is secured inside the second limiting mechanism 6. Next, the fourth gear 56 at the end of the third drive motor 55 drives the third gear 54 to rotate via the second chain 57. During rotation, the third gear 54 simultaneously drives the first sleeve drive shaft 52 and the first limiting sleeve 53 to rotate. This causes the clamped copper alloy rod to rotate, and the rotation of the polishing wheel 25 combined with the rotation of the copper alloy rod improves the polishing effect.

[0036] Please continue to refer to this. Figure 5 The second limiting mechanism 6 includes a supporting slide plate 61, a second rotating shaft support block 62, a second sleeve drive shaft 63, a second limiting sleeve 64, and a second cylinder 65. The supporting slide plate 61 is slidably connected to the surface of the equipment frame 1 via a slide rail. A plurality of second rotating shaft support blocks 62 are disposed on the surface of the supporting slide plate 61. Each second rotating shaft support block 62 has a second sleeve drive shaft 63 rotatably disposed inside. One end of the second sleeve drive shaft 63 is connected to a rotatable second limiting sleeve 64. The end of the second limiting sleeve 64 is provided with a circular groove. The other end of the second sleeve drive shaft 63 is connected to the piston rod of the second cylinder 65.

[0037] When it is necessary to engage the other end of the copper alloy rod within the circular groove at the end of the second limiting sleeve 64, the piston rod of the second cylinder 65 extends, thereby causing the entire support slide plate 61 to slide relative to the surface of the equipment frame 1 until the end of the copper alloy rod is engaged. It should be noted that the end of the second limiting sleeve 64 is rotatable relative to the end of the second sleeve drive shaft 63. This arrangement is to enable the first limiting sleeve 53 to drive the copper alloy rod to rotate.

[0038] Please continue to refer to this. Figure 6 The bottom of the equipment frame 1 is provided with a height adjustment mechanism 7 for adjusting the height of the copper alloy rod. The height adjustment mechanism 7 includes a lifting support frame 71, a lifting guide rod 72, a third cylinder 73, and a material placement block 74. The lifting guide rod 72 is slidably connected inside the lifting support frame 71. The bottom of the lifting support frame 71 is provided with a third cylinder 73. The piston rod of the third cylinder 73 and the end of the lifting guide rod are both connected to the material placement block 74. The cross-section of the material placement block 74 is V-shaped.

[0039] An external robotic arm places the copper alloy rod to be polished onto the surface of the material placement block 74. Then, the piston rod of the third cylinder 73 extends until the entire material placement block 74 is raised. The cross-section of the material placement block 74 is a V-shaped concave surface to prevent the copper alloy rod from sliding to the outside. Afterward, the first limiting sleeve 53 and the second limiting sleeve 64 are used to lock the second limiting sleeve 64.

[0040] Working principle and usage of this utility model:

[0041] The robotic arm places the copper alloy rod to be polished on the surface of the material placement block 74. Then, the piston rod of the third cylinder 73 extends until the entire material placement block 74 is raised. Next, the piston rod of the second cylinder 65 extends, causing the entire support slide plate 61 to slide relative to the surface of the equipment frame 1. At the same time, the second limiting sleeve 64 also moves and pushes and adjusts the position of the copper alloy rod in the axial direction until the gap between the first limiting sleeve 53 and the second limiting sleeve 64 becomes smaller, thereby locking the two ends of the copper alloy rod.

[0042] Next, the fourth gear 56 at the end of the third drive motor 55 drives the third gear 54 to rotate via the second chain 57. During the rotation of the third gear 54, the first sleeve drive shaft 52 and the first limiting sleeve 53 can be rotated simultaneously. At this time, the clamped copper alloy rod can be rotated.

[0043] The rotating shaft of the first drive motor 41 drives the first gear 42 to move during rotation. The first gear 42 then drives the second gear 43 to rotate via the first chain 44. The second gear 43, in turn, drives the support roller shaft 362 to rotate during rotation. The conveyor belt drive wheel 363 on the support roller shaft 362 also rotates simultaneously. The conveyor belt drive wheel 363 then drives the conveyor drive belt 35 to move.

[0044] During its movement, the conveyor drive belt 35 can pull the entire conveyor support frame 32 to change position via the sliding drive plate 34. During the movement and position change of the conveyor support frame 32, the support rollers 33 slide on the surface of the conveyor guide rail 31. During the movement of the conveyor support frame 32, the polishing mechanism 2 polishes the surface of the copper alloy rod from one end to the other.

[0045] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A device capable of automatically polishing copper alloy rods, comprising a device frame (1), characterized in that, The surface of the equipment frame (1) is provided with a conveying mechanism (3) for conveying the polishing mechanism (2). A driving mechanism (4) is connected to one side of the conveying mechanism (3). The polishing mechanism (2) is used to polish the copper alloy rod. The surface of the equipment frame (1) is also provided with a first limiting mechanism (5) that can rotate and a second limiting mechanism (6) that can move. The position change of the second limiting mechanism (6) relative to the first limiting mechanism (5) can clamp or release the copper alloy rod. The bottom of the equipment frame (1) is provided with a height adjustment mechanism (7) for adjusting the height of the copper alloy rod.

2. The equipment for automatically polishing copper alloy rods according to claim 1, characterized in that, The conveying mechanism (3) includes a conveying guide rail (31), a conveying support frame (32), support rollers (33), a sliding drive plate (34), a conveying drive belt (35), and a conveying belt support assembly (36). The surface of the equipment frame (1) is provided with several conveying guide rails (31). The bottom of each conveying support frame (32) is provided with several rotatable support rollers (33). Each support roller (33) is adapted to the surface of the conveying guide rail (31). The surface of the conveying support frame (32) is provided with a sliding drive plate (34). The interior of the sliding drive plate (34) is connected to a conveying drive belt (35) capable of displacement movement. The two sides of the conveying drive belt (35) are connected to the conveying belt support assembly (36). The movement of the conveying drive belt (35) can simultaneously drive the conveying support frame (32) to change position.

3. The equipment for automatically polishing copper alloy rods according to claim 2, characterized in that, The conveyor belt support assembly (36) includes several roller support plates (361), support rollers (362) and conveyor belt drive wheels (363). Each roller support plate (361) is disposed on the surface of the equipment frame (1). Support rollers (362) are rotatably disposed between adjacent roller support plates (361). Each support roller (362) is provided with a conveyor belt drive wheel (363) on its surface. The conveyor drive belt (35) is sleeved and installed on the surface of the conveyor belt drive wheel (363).

4. The equipment for automatically polishing copper alloy rods according to claim 3, characterized in that, The drive mechanism (4) includes a first drive motor (41), a first gear (42), a second gear (43) and a first chain (44). The first drive motor (41) is mounted on the surface of the equipment frame (1). The first gear (42) is connected to the end of the shaft of the first drive motor (41). The surface of at least one support roller shaft (362) is also provided with a second gear (43). The first gear (42) and the second gear (43) are connected by the first chain (44).

5. The equipment for automatically polishing copper alloy rods according to claim 4, characterized in that, The polishing mechanism (2) includes a polishing support frame (21), a first cylinder (23), a guide column (22), a second drive motor (24), a polishing wheel (25), and a protective cover (26). The polishing support frame (21) has a plurality of guide columns (22) on its surface. Each guide column (22) is slidably connected to a support sleeve (321) on the surface of the conveying support frame (32). The conveying support frame (32) also has a first cylinder (23) in the middle. The piston rod of the first cylinder (23) is connected to the bottom of the polishing support frame (21). The polishing support frame (21) has a second drive motor (24) on the side near the first limiting mechanism (5). The end of the shaft of the second drive motor (24) is connected to the polishing wheel (25). The polishing wheel (25) has a protective cover (26) on its outside.

6. The equipment for automatically polishing copper alloy rods according to claim 5, characterized in that, The first limiting mechanism (5) includes several first rotating shaft support blocks (51), a first sleeve drive shaft (52), a first limiting sleeve (53), a third gear (54), a third drive motor (55), a fourth gear (56), and a second chain (57). Each first rotating shaft support block (51) has a first sleeve drive shaft (52) rotatably mounted inside. One end of the first sleeve drive shaft (52) is connected to the first limiting sleeve (53). The end of the first limiting sleeve (53) is provided with a circular groove. The other end of the first sleeve drive shaft (52) is provided with a third gear (54). The bottom side of the equipment frame (1) is also provided with a third drive motor (55). The fourth gear (56) at the end of the third drive motor (55) is connected to the third gear (54) through the second chain (57).

7. The equipment for automatically polishing copper alloy rods according to claim 6, characterized in that, The second limiting mechanism (6) includes a support slide plate (61), a second rotating shaft support block (62), a second sleeve drive shaft (63), a second limiting sleeve (64), and a second cylinder (65). The support slide plate (61) is slidably connected to the surface of the equipment frame (1) via a slide rail. Several second rotating shaft support blocks (62) are disposed on the surface of the support slide plate (61). Each second rotating shaft support block (62) has a second sleeve drive shaft (63) rotatably disposed inside. One end of the second sleeve drive shaft (63) is connected to a rotatable second limiting sleeve (64). The end of the second limiting sleeve (64) is provided with a circular groove. The other end of the second sleeve drive shaft (63) is connected to the piston rod of the second cylinder (65).

8. The equipment for automatically polishing copper alloy rods according to claim 7, characterized in that, The height adjustment mechanism (7) includes a lifting support frame (71), a lifting guide rod (72), a third cylinder (73), and a material placement block (74). The lifting support frame (71) is slidably connected to the lifting guide rod (72). The bottom of the lifting support frame (71) is provided with a third cylinder (73). The piston rod of the third cylinder (73) and the end of the lifting guide rod are both connected to the material placement block (74). The cross-section of the material placement block (74) is V-shaped.

Images