Calendering device for mechanical dog metal fitting production

Abstract

The invention belongs to the technical field of metal treatment, and discloses a calendering device for mechanical dog metal fitting production, which comprises a metal material and a pair of roller assemblies, the pair of roller assemblies is driven by a driving device and is used for calendering the metal material, and the calendering device further comprises heat conduction assemblies, and the heat conduction assemblies are fixedly arranged on the inner walls of the roller assemblies. Water in the water inlet pipe enters the middle of the roller body through the middle, and the water pushes the transmission frame to move from the middle of the roller body to the two ends through the heat conduction assembly, the transmission assembly and the pushing assembly along with continuous temperature rise of the roller body between the roller body and the rubber pad; the protrusions and the recesses of the transmission frames are matched with the arc-shaped waved plates, the arc-shaped waved plates are pushed to move towards the outer ends, the rubber pads are pushed to expand outwards, the gaps between the rubber pads and the roller body are reduced, the flow speed of cooling water can be increased by reducing the gaps, and then the cooling efficiency of the roller body is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of metal processing, in particular to a rolling device for producing mechanical dog metal accessories. Background Art

[0002] A robotic dog, also known as a quadruped robot, is a robot that imitates the way animals walk. In the production process of robotic dog metal accessories, metal raw materials usually need to be calendered. Metal calendering, also known as rolling, is a process of pressing metal raw materials into the desired shape by applying greater pressure. It involves transferring metal sheets through equipment such as rolling mills to one or more pairs of rollers, and then applying pressure to cause plastic deformation of the metal sheets, ultimately achieving the desired size and shape. The principle of calendering is to gradually pass the metal sheets through the cracks between the rollers and apply pressure, thereby changing the shape and size of the metal raw materials. Rolling can be divided into hot rolling and cold rolling, and hot rolling is the rolling performed above the recrystallization temperature of the metal. During the hot rolling process, the internal structure of the metal recrystallizes, which can improve the mechanical properties and internal structure of the material. When the high-temperature metal material passes through the gap between a pair of rollers, the temperature of the metal material will be transmitted to the surface of the roller. Since the metal material is continuously transmitted and the temperature of the fed metal material remains unchanged, the temperature of the roller will continue to rise during the rolling of the metal material by the roller, which will affect the normal operation of the roller and reduce the service life of the roller. Therefore, a rolling device for the production of mechanical dog metal accessories is proposed. Summary of the invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides a rolling device for the production of mechanical dog metal accessories, which solves the problem that the temperature of the existing rolling rollers will continue to rise during the rolling process of metal materials, which will affect the normal operation of the rolling rollers and reduce the service life of the rolling rollers.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a rolling device for producing mechanical dog metal accessories, comprising a metal material and a pair of roller assemblies, wherein the pair of roller assemblies are driven by a driving device to roll the metal material, and further comprising:

[0005] A heat-conducting component, wherein the heat-conducting component is fixedly mounted on the inner wall of the roller assembly;

[0006] A transmission assembly, wherein the transmission assembly is installed inside the roller assembly, and the heat conduction assembly is connected to the transmission assembly via a pushing assembly;

[0007] A heat dissipation component, the end of which is movably sleeved inside the transmission component, and the heat dissipation component is located inside the roller component;

[0008] Wherein, the roller assembly comprises a water inlet pipe, water injection equipment is arranged at both ends of the water inlet pipe, a roller body is movably mounted at both ends of the water inlet pipe through a cross support frame, support rings are movably sleeved at both ends of the roller body, and the support rings are fixedly sleeved on the outside of the water inlet pipe;

[0009] The two ends of the water inlet pipe are respectively fixed with a first butt plate and a second butt plate, a rubber pad is arranged between the first butt plate and the second butt plate, and a cooling water channel is formed between the rubber pad and the roller body;

[0010] In an initial state, the space between the roller body and the rubber pad is filled with water;

[0011] Water enters the middle part of the roller body through the water inlet pipe, moves along the water channel between the roller body and the rubber pad to take away the heat of the roller body.

[0012] Preferably, both ends of the water inlet pipe are sleeved with a transmission frame, and an arc-shaped corrugated plate is arranged in a ring array between the first docking plate and the second docking plate;

[0013] The transmission frame is annular and wavy, and the outer wall of the transmission frame is adapted to the inner wall of the arc-shaped wavy plate;

[0014] The transmission frame moves outward under the action of the transmission component, the heat conduction component and the pushing component, and the transmission frame pushes the arc-shaped wave plate to expand outward, thereby reducing the gap between the rubber pad and the roller body.

[0015] Preferably, a drain pipe is fixedly mounted on the support ring, and a pressure regulating valve is provided on the drain pipe.

[0016] Preferably, the heat conduction component comprises an annular tube movably sleeved on the inner wall of the roller body, the inner wall of the annular tube is filled with kerosene, and the outer wall of the annular tube is in contact with the inner wall of the roller body;

[0017] The inside of the roller body is fixedly provided with heat-conducting fins, the outer wall of the annular tube is provided with an annular notch, and the heat-conducting fins pass through the annular notch and are located inside the annular tube.

[0018] Preferably, the pushing assembly comprises a guide tube fixedly mounted on the inner wall of the annular tube, a piston block is movably sleeved inside the guide tube, and limiting rings for limiting the piston block are fixedly mounted on both upper and lower ends of the inner wall of the guide tube.

[0019] Preferably, the transmission assembly comprises a liquid storage box fixedly mounted on the outside of the water inlet pipe through a docking frame, and a water inlet box is provided in a movable sleeve in the middle of the water inlet pipe;

[0020] The interior of the liquid storage box is filled with water, and the piston block is connected to the water inlet box through a transmission rod.

[0021] Preferably, the transmission assembly further comprises a first water inlet hole opened in the middle of the water inlet pipe, and the inner wall of the water inlet box is provided with a second water inlet hole having the same aperture as the first water inlet hole;

[0022] In an initial state, the first water inlet hole and the second water inlet hole do not completely overlap.

[0023] Preferably, a drainage hole is provided on the outside of the liquid storage box, and the drainage hole is connected with the water inlet tank through a corrugated connecting pipe.

[0024] Preferably, one end of the transmission frame is sleeved inside the liquid storage box, and the transmission frame and the liquid storage box are provided with a reset spring.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The water in the water inlet pipe of the present invention enters the middle part of the roller body through the middle part, and the water moves from the middle part to the two ends along the gap between the roller body and the rubber pad to take away the heat of the roller body. As the temperature of the roller body continues to rise, the transmission frame is pushed from the middle part to the two ends of the roller body by the heat conduction component, the transmission component and the pushing component. The convexity and concave of the transmission frame cooperate with the arc-shaped wave plate to push the arc-shaped wave plate to move toward the outer end, push the rubber pad to expand outward, and reduce the gap between the rubber pad and the roller body. The narrowing of the gap can increase the flow rate of the cooling water, thereby improving the efficiency of cooling the roller body.

[0027] The present invention uses the heat of the roller body to expand the kerosene inside the annular tube, pushes the piston block to move downward along the guide tube, and pushes the water inlet box to rotate with the water inlet pipe as the central axis through the transmission rod. During the rotation, the overlap between the second water inlet hole and the first water inlet hole gradually increases, and water enters the water inlet box through the first water inlet hole and the second water inlet hole, and then enters the inside of the roller body through the corrugated connecting pipe. As the water inlet box rotates, the first water inlet hole and the second water inlet hole gradually overlap, increasing the amount of cooling water inlet. When the temperature of the roller body decreases, the temperature of the kerosene in the annular tube decreases and the volume decreases. At this time, the piston block pushes the piston block to move up and reset under the action of the reset spring sheet, which will reduce the amount of cooling water inlet and achieve the purpose of saving cooling water. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0030] Figure 3 It is a schematic diagram of the appearance structure of the transmission frame and the liquid storage box of the present invention;

[0031] Figure 4It is a schematic diagram of the cross-sectional structure of the transmission component, the heat conduction component and the driving component of the present invention;

[0032] Figure 5 It is a schematic diagram of the cross-sectional structure of the heat dissipation assembly and the roller body of the present invention;

[0033] Figure 6 It is a schematic diagram of the coordination structure of the transmission component, the heat-conducting component, the pushing component and the heat-dissipating component of the present invention;

[0034] Figure 7 It is a schematic diagram of the matching structure of the transmission component, the heat conduction component and the pushing component of the present invention;

[0035] Figure 8 It is a schematic diagram of the cross-sectional structure of the heat dissipation assembly and the roller assembly of the present invention;

[0036] Fig. 9 For the present invention Figure 8 The enlarged structural diagram at A in the middle;

[0037] Fig.10 For the present invention Figure 8 Enlarged structural diagram at B in the middle.

[0038] In the figure: 1. metal material; 2. rolling roller assembly; 21. rolling roller body; 22. supporting ring; 23. cross supporting frame; 24. drain pipe; 25. water inlet pipe; 3. transmission assembly; 31. liquid storage box; 32. docking frame; 33. corrugated connecting pipe; 34. water inlet box; 35. first water inlet hole; 36. second water inlet hole; 4. heat conduction assembly; 41. annular pipe; 42. heat conduction fin; 5. pushing assembly; 51. guide pipe; 52. limit ring; 53. piston block; 54. transmission rod; 6. heat dissipation assembly; 61. transmission frame; 62. rubber pad; 63. arc wave plate; 64. first docking plate; 65. second docking plate; 66. reset spring. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] like Figures 1 to 10 As shown, the present invention provides a rolling device for producing mechanical dog metal accessories, comprising a metal material 1 and a pair of roller assemblies 2, the pair of roller assemblies 2 are driven by a driving device to roll the metal material 1, and also includes:

[0041] A heat conducting component 4, the heat conducting component 4 is fixed to the inner wall of the roller component 2;

[0042] The transmission component 3 is installed inside the roller component 2, and the heat conduction component 4 is connected to the transmission component 3 through the pushing component 5;

[0043] A heat dissipation component 6, the end of which is movably sleeved inside the transmission component 3, and the heat dissipation component 6 is located inside the roller component 2;

[0044] The roller assembly 2 includes a water inlet pipe 25, and water injection equipment is provided at both ends of the water inlet pipe 25. The roller body 21 is movably mounted on both ends of the water inlet pipe 25 through a cross support frame 23. The two ends of the roller body 21 are movably sleeved with support rings 22, and the support rings 22 are fixedly sleeved on the outside of the water inlet pipe 25.

[0045] The first butt joint plate 64 and the second butt joint plate 65 are respectively fixedly mounted at both ends of the water inlet pipe 25. A rubber pad 62 is arranged between the first butt joint plate 64 and the second butt joint plate 65. A cooling water channel is formed between the rubber pad 62 and the roller body 21.

[0046] In the initial state, the space between the roller body 21 and the rubber pad 62 is filled with water;

[0047] Water enters the middle of the roller body 21 through the water inlet pipe 25, and moves along the water channel between the roller body 21 and the rubber pad 62 to take away the heat of the roller body 21;

[0048] Both ends of the water inlet pipe 25 are sleeved with a transmission frame 61, and an arc-shaped wave plate 63 is arranged in a circular array between the first docking plate 64 and the second docking plate 65;

[0049] The transmission frame 61 is annular and wavy, and the outer wall of the transmission frame 61 is adapted to the inner wall of the arc-shaped wavy plate 63;

[0050] The transmission frame 61 moves outward under the action of the transmission component 3, the heat conducting component 4 and the pushing component 5, and the transmission frame 61 pushes the arc-shaped wave plate 63 to expand outward, thereby reducing the gap between the rubber pad 62 and the roller body 21;

[0051] A drain pipe 24 is fixedly mounted on the support ring 22 , and a pressure regulating valve is provided on the drain pipe 24 .

[0052] A pair of roller assemblies 2 are driven to rotate by a driving device to perform hot rolling on the metal material 1. The water injection device is connected to both ends of the water inlet pipe 25. The water in the water inlet pipe 25 enters the middle of the roller body 21 through the middle. The water moves from the middle to both ends along the roller body 21 and the rubber pad 62 to take away the heat of the roller body 21, thereby achieving a cooling treatment on the roller body 21.

[0053] Since the roller body 21 is initially filled with water, the weight of the roller body 21 can be increased, the stability of the rolling rotation of the roller body 21 can be ensured, and the rolling effect of the metal material can be improved;

[0054] As the temperature of the roller body 21 continues to rise, the transmission frame 61 is pushed from the middle of the roller body 21 to both ends by the heat conduction component 4, the transmission component 3 and the pushing component 5. The convexities and concaveities of the transmission frame 61 cooperate with the arc-shaped wave plate 63 to push the arc-shaped wave plate 63 to move outward, pushing the rubber pad 62 to expand outward, and reducing the gap between the rubber pad 62 and the roller body 21. By reducing the gap, the flow rate of the cooling water can be increased, thereby improving the efficiency of cooling the roller body 21.

[0055] At the same time, since the transmission frame 61 and the arc-shaped wave plate 63 are wavy, when the arc-shaped wave plate 63 pushes the rubber pad 62 to expand, the outer wall of the rubber pad 62 is affected by the water pressure and fits against the outer wall of the arc-shaped wave plate 63, so that the rubber pad 62 and the arc-shaped wave plate 63 have the same shape. When the cooling water passes through the waterway between the roller body 21 and the rubber pad 62, the water will hit the inner wall of the roller body 21 in a wave shape under the guidance of the rubber pad 62, thereby further improving the cooling effect of the roller body 21.

[0056] like Figure 6 and Fig. 9 As shown, the heat conducting component 4 includes an annular tube 41 movably sleeved on the inner wall of the roller body 21, the inner wall of the annular tube 41 is filled with kerosene, and the outer wall of the annular tube 41 is in contact with the inner wall of the roller body 21;

[0057] The roller body 21 is internally fixed with heat-conducting fins 42 . The outer wall of the annular tube 41 is provided with an annular notch. The heat-conducting fins 42 pass through the annular notch and are located in the annular tube 41 .

[0058] The metal material 1 is subjected to rolling treatment by the roller body 21, and the temperature of the roller body 21 continues to rise. Since the outer wall of the annular tube 41 is in contact with the inner wall of the roller body 21 and the heat-conducting fins 42 are located inside the annular tube 41, the heat of the roller body 21 is conducted to the inside of the annular tube 41 through the heat-conducting fins 42, and the kerosene inside the annular tube 41 expands when heated.

[0059] like Figure 6-Figure 10 As shown, the pushing assembly 5 includes a guide tube 51 fixedly mounted on the inner wall of the annular tube 41, a piston block 53 is movably sleeved inside the guide tube 51, and limiting rings 52 for limiting the piston block 53 are fixedly mounted on the upper and lower ends of the inner wall of the guide tube 51;

[0060] The transmission assembly 3 includes a liquid storage box 31 fixed to the outside of the water inlet pipe 25 through a docking frame 32, and a water inlet box 34 is movably sleeved in the middle of the water inlet pipe 25;

[0061] The interior of the liquid storage box 31 is filled with water, and the piston block 53 is connected to the water inlet box 34 through a transmission rod 54 .

[0062] The transmission assembly 3 further includes a first water inlet hole 35 opened in the middle of the water inlet pipe 25, and the inner wall of the water inlet box 34 is provided with a second water inlet hole 36 having the same hole diameter as the first water inlet hole 35;

[0063] In the initial state, the first water inlet hole 35 and the second water inlet hole 36 do not completely overlap;

[0064] A drainage hole is provided on the outside of the liquid storage box 31, and the drainage hole is connected to the water inlet box 34 through a corrugated connecting pipe 33;

[0065] One end of the transmission frame 61 is sleeved inside the liquid storage box 31 , and a reset spring 66 is disposed between the transmission frame 61 and the liquid storage box 31 .

[0066] The heat of the roller body 21 causes the kerosene inside the annular tube 41 to expand, pushing the piston block 53 to move downward along the guide tube 51, and pushing the water inlet box 34 to rotate with the water inlet pipe 25 as the central axis through the transmission rod 54. During the rotation, the overlap between the second water inlet hole 36 and the first water inlet hole 35 gradually increases, and water enters the water inlet box 34 through the first water inlet hole 35 and the second water inlet hole 36, and then enters the interior of the roller body 21 through the corrugated connecting pipe 33. As the water inlet box 34 rotates, the first water inlet hole 35 and the second water inlet hole 36 gradually overlap, increasing the amount of cooling water inlet;

[0067] When the piston block 53 moves downward, the water in the liquid storage box 31 pushes the transmission frames 61 at both ends to move outward and compress the reset spring 66. The arc-shaped wave plate 63 is pushed by the movement of the transmission frame 61 to reduce the gap between the rubber pad 62 and the roller body 21.

[0068] When the temperature of the roller body 21 decreases, the temperature of the kerosene in the annular tube 41 decreases and the volume decreases. At this time, the piston block 53 is pushed upward and reset by the reset spring 66, which will reduce the amount of cooling water entering and achieve the purpose of saving cooling water.

[0069] The working principle and use process of the present invention:

[0070] The metal material 1 is rolled by the roller body 21, and the temperature of the roller body 21 continues to rise. Since the outer wall of the annular tube 41 is in contact with the inner wall of the roller body 21, and the heat-conducting fins 42 are located inside the annular tube 41, the heat of the roller body 21 is transferred to the inside of the annular tube 41 through the heat-conducting fins 42, and the kerosene inside the annular tube 41 expands when heated.

[0071] The heat of the roller body 21 causes the kerosene inside the annular tube 41 to expand, pushing the piston block 53 to move downward along the guide tube 51, and pushing the water inlet box 34 to rotate with the water inlet pipe 25 as the central axis through the transmission rod 54. During the rotation, the overlap between the second water inlet hole 36 and the first water inlet hole 35 gradually increases, and water enters the water inlet box 34 through the first water inlet hole 35 and the second water inlet hole 36, and then enters the interior of the roller body 21 through the corrugated connecting pipe 33. As the water inlet box 34 rotates, the first water inlet hole 35 and the second water inlet hole 36 gradually overlap, increasing the amount of cooling water inlet;

[0072] When the piston block 53 moves downward, the water in the liquid storage box 31 pushes the transmission frames 61 at both ends to move outward and compress the reset spring 66. The arc-shaped wave plate 63 is pushed by the movement of the transmission frame 61 to reduce the gap between the rubber pad 62 and the roller body 21.

[0073] When the temperature of the roller body 21 decreases, the temperature of the kerosene in the annular tube 41 decreases and the volume decreases. At this time, the piston block 53 is pushed upward and reset by the reset spring 66, which will reduce the amount of cooling water inflow.

[0074] A pair of roller assemblies 2 are driven to rotate by a driving device to perform hot rolling on the metal material 1. The water injection device is connected to both ends of the water inlet pipe 25. The water in the water inlet pipe 25 enters the middle of the roller body 21 through the middle. The water moves from the middle to both ends along the roller body 21 and the rubber pad 62 to take away the heat of the roller body 21, thereby achieving a cooling treatment on the roller body 21.

[0075] Since the roller body 21 is initially filled with water, the weight of the roller body 21 can be increased, the stability of the rolling rotation of the roller body 21 can be ensured, and the rolling effect of the metal material can be improved;

[0076] As the temperature of the roller body 21 continues to rise, the transmission frame 61 is pushed from the middle of the roller body 21 to both ends by the heat conduction component 4, the transmission component 3 and the pushing component 5. The convexities and concaveities of the transmission frame 61 cooperate with the arc-shaped wave plate 63 to push the arc-shaped wave plate 63 to move outward, pushing the rubber pad 62 to expand outward, and reducing the gap between the rubber pad 62 and the roller body 21. By reducing the gap, the flow rate of the cooling water can be increased, thereby improving the efficiency of cooling the roller body 21.

[0077] At the same time, since the transmission frame 61 and the arc-shaped wave plate 63 are wavy, when the arc-shaped wave plate 63 pushes the rubber pad 62 to expand, the outer wall of the rubber pad 62 is affected by the water pressure and fits against the outer wall of the arc-shaped wave plate 63, so that the rubber pad 62 and the arc-shaped wave plate 63 have the same shape. When the cooling water passes through the waterway between the roller body 21 and the rubber pad 62, the water will hit the inner wall of the roller body 21 in a wave shape under the guidance of the rubber pad 62, thereby further improving the cooling effect of the roller body 21.

[0078] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0079] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rolling device for producing mechanical dog metal parts, comprising a metal material (1) and a pair of roller assemblies (2), wherein the pair of roller assemblies (2) are driven by a driving device to roll the metal material (1), characterized in that: Also includes: A heat-conducting component (4), wherein the heat-conducting component (4) is fixedly mounted on the inner wall of the roller component (2); A transmission assembly (3), wherein the transmission assembly (3) is installed inside the roller assembly (2), and the heat conduction assembly (4) is connected to the transmission assembly (3) via a pushing assembly (5); A heat dissipation component (6), the end of which is movably sleeved inside the transmission component (3), and the heat dissipation component (6) is located inside the roller component (2); The roller assembly (2) comprises a water inlet pipe (25), water injection equipment is arranged at both ends of the water inlet pipe (25), a roller body (21) is movably mounted at both ends of the water inlet pipe (25) via a cross support frame (23), support rings (22) are movably sleeved at both ends of the roller body (21), and the support rings (22) are fixedly sleeved on the outside of the water inlet pipe (25); A first docking plate (64) and a second docking plate (65) are respectively fixedly mounted at both ends of the water inlet pipe (25); a rubber pad (62) is arranged between the first docking plate (64) and the second docking plate (65); a cooling water channel is formed between the rubber pad (62) and the roller body (21); In an initial state, the space between the roller body (21) and the rubber pad (62) is filled with water; Water enters the middle part of the roller body (21) through the water inlet pipe (25), and moves along the water channel between the roller body (21) and the rubber pad (62) to take away the heat of the roller body (21).

2. The rolling device for producing mechanical dog metal accessories according to claim 1 is characterized in that: Both ends of the water inlet pipe (25) are sleeved with a transmission frame (61), and an arc-shaped wave plate (63) is arranged in a circular array between the first docking plate (64) and the second docking plate (65); The transmission frame (61) is annular and wavy, and the outer wall of the transmission frame (61) is adapted to the inner wall of the arc-shaped wavy plate (63); The transmission frame (61) moves outward under the action of the transmission component (3), the heat conduction component (4) and the pushing component (5), and the transmission frame (61) pushes the arc-shaped wave plate (63) to expand outward, thereby reducing the gap between the rubber pad (62) and the roller body (21).

3. The rolling device for producing mechanical dog metal accessories according to claim 1 is characterized in that: A drainage pipe (24) is fixedly mounted on the support ring (22), and a pressure regulating valve is arranged on the drainage pipe (24).

4. The rolling device for producing mechanical dog metal accessories according to claim 2 is characterized in that: The heat conduction component (4) comprises an annular tube (41) movably sleeved on the inner wall of the roller body (21), the inner wall of the annular tube (41) is filled with kerosene, and the outer wall of the annular tube (41) is in contact with the inner wall of the roller body (21); A heat-conducting fin (42) is fixedly installed inside the roller body (21), an annular notch is provided on the outer wall of the annular tube (41), and the heat-conducting fin (42) passes through the annular notch and is located inside the annular tube (41).

5. The rolling device for producing mechanical dog metal accessories according to claim 4 is characterized in that: The pushing assembly (5) comprises a guide tube (51) fixedly mounted on the inner wall of the annular tube (41), a piston block (53) being movably sleeved inside the guide tube (51), and limiting rings (52) for limiting the position of the piston block (53) being fixedly mounted at both upper and lower ends of the inner wall of the guide tube (51).

6. The rolling device for producing mechanical dog metal parts according to claim 5 is characterized in that: The transmission assembly (3) comprises a liquid storage box (31) fixedly mounted on the outside of the water inlet pipe (25) via a docking frame (32), and a water inlet box (34) is provided in a movable sleeve in the middle of the water inlet pipe (25); The interior of the liquid storage box (31) is filled with water, and the piston block (53) is connected to the water inlet box (34) via a transmission rod (54).

7. The rolling device for producing mechanical dog metal parts according to claim 6 is characterized in that: The transmission assembly (3) further comprises a first water inlet hole (35) formed in the middle of the water inlet pipe (25), and the inner wall of the water inlet box (34) is provided with a second water inlet hole (36) having the same diameter as the first water inlet hole (35); In an initial state, the first water inlet hole (35) and the second water inlet hole (36) do not completely overlap.

8. The rolling device for producing mechanical dog metal parts according to claim 7 is characterized in that: The outside of the liquid storage box (31) is provided with a drainage hole, and the drainage hole is connected with the water inlet box (34) through a corrugated connecting pipe (33).

9. The rolling device for producing mechanical dog metal parts according to claim 6, characterized in that: One end of the transmission frame (61) is sleeved inside the liquid storage box (31), and a reset spring sheet (66) is provided between the transmission frame (61) and the liquid storage box (31).

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