Clamping jaw adjusting device of cold rolling mill

Abstract

The utility model discloses a cold rolling mill clamping jaw adjusting device which comprises a machine frame, a hollow rotating shaft, a pushing jaw assembly, at least two clamping clamping jaw assemblies, a driving mechanism, a transmission mechanism and an adjusting connector. At least two linear guide grooves extending in the axial direction are evenly formed in the peripheral face of the hollow rotating shaft in the circumferential direction. The hollow rotating shaft is coaxially sleeved with the pushing claw assembly, at least two inclined guide grooves corresponding to the linear guide grooves are evenly formed in the inner wall of the pushing claw assembly in the circumferential direction, and the clamping claw assemblies slide in the corresponding linear guide grooves. The clamping jaw assembly is provided with a clamping face facing the axis of the hollow rotating shaft. The clamping stroke of the driving mechanism can be adjusted, the clamping position of the clamping jaw can be rapidly adjusted after the clamping jaw is abraded, and time is saved.

Description

Technical Field

[0001] The utility model relates to a cold rolling mill claw adjusting device, belonging to the technical field of steel pipe production. Background Art

[0002] At present, cold-rolled steel pipe is a common steel pipe product, which is widely used in various fields. Compared with hot-rolled steel pipe, cold-rolled steel pipe has the characteristics of high dimensional accuracy, good surface quality and excellent mechanical properties, so it has irreplaceable advantages in high-demand engineering and industrial applications.

[0003] The production process of cold-rolled steel pipes is complex and requires multiple steps to complete. From the preparation of raw materials, the manufacture of tube blanks, to the final inspection of finished products, each link requires precise control and operation. During the cold rolling process, the steel pipe needs to undergo multiple deformations and processing to achieve the required size and performance.

[0004] After searching the prior art, it was found that the Chinese patent with announcement number CN218486874U disclosed a trolley clamping device for cold-rolled steel pipes. The patent achieved automation by fixing with retractable jaws, but it was found during use that, first, the jaws were prone to wear after long-term use. Once worn, the jaws could not effectively clamp the pipe, causing the pipe to slip or loosen during processing, causing pipe punching, which in turn affected product quality or caused equipment damage. Secondly, in order to solve the problem of jaw wear, the jaws need to be disassembled, replaced or adjusted, and the sheath and other related parts need to be removed during the disassembly process. The whole process is time-consuming and labor-intensive, increasing maintenance costs and downtime. Summary of the invention

[0005] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a cold rolling mill jaw adjustment device, which can adjust the clamping stroke of the driving mechanism and quickly adjust the clamping of the jaw after the jaw is worn, thereby saving time.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a cold rolling mill claw adjustment device, comprising:

[0007] frame;

[0008] A hollow rotary shaft, the hollow rotary shaft is rotatably mounted on the frame, and the outer circumferential surface of the hollow rotary shaft is evenly provided with at least two linear guide grooves extending in the axial direction;

[0009] A push claw assembly, wherein the push claw assembly is coaxially sleeved on the hollow rotary shaft, and the inner wall of the push claw assembly is evenly provided with at least two oblique guide grooves corresponding to the linear guide groove along the circumferential direction;

[0010] At least two clamping claw assemblies, the clamping claw assemblies slide in the corresponding linear guide grooves, the clamping claw assemblies are provided with clamping surfaces facing the axis of the hollow rotary shaft, the clamping claw assemblies are slidably matched with the conical surfaces of the corresponding oblique guide grooves of the push claw assemblies, and the clamping claw assemblies are suitable for radially moving in the linear guide grooves driven by the push claw assemblies;

[0011] A driving mechanism, the driving mechanism is mounted on the frame, the driving mechanism is provided with a telescopic end, and the telescopic end is provided with an adjustment hole;

[0012] A transmission mechanism, the transmission mechanism is rotatably mounted on the push claw assembly, and one end of the transmission mechanism is hinged on the frame;

[0013] An adjusting joint, the adjusting joint being threadedly connected in the adjusting hole, the adjusting joint being hinged on the other end of the transmission mechanism, and the adjusting joint being adapted to be actuated to adjust the extension length on the telescopic end of the transmission mechanism;

[0014] The driving mechanism is suitable for driving the push claw assembly to move in the axial direction of the hollow rotary shaft through the transmission mechanism, thereby driving the clamping claw assembly to move radially to clamp or loosen the pipe.

[0015] Furthermore, a specific structure of a transmission mechanism is provided, wherein the push claw assembly is provided with a main body section and an extended diameter reduction section, and a shaft shoulder is formed between the diameter reduction section and the main body section;

[0016] The transmission mechanism comprises:

[0017] An annular connecting plate, the annular connecting plate is rotatably mounted on the diameter reduction section of the push claw assembly and abuts against the shaft shoulder, and linear slider guide grooves extending in the circumferential direction are provided on both sides of the annular connecting plate;

[0018] A transmission swing arm, wherein an extension arm is provided at the upper part of the transmission swing arm, a waist groove hinged to the adjustment joint is provided on the extension arm, and a lower fork arm is provided at the lower part of the transmission swing arm, and the lower fork arm is hinged to the frame;

[0019] A connecting frame is provided in the middle of the transmission swing arm;

[0020] At least one slider, the slider is hinged in the middle of the connecting frame of the transmission swing arm, and the slider is slidably matched with the linear slider guide groove of the annular connecting plate;

[0021] When the driving mechanism drives the annular connecting plate to abut against the pushing claw assembly through the transmission swing arm, the pushing claw assembly drives the clamping claw assembly to contract radially and clamp;

[0022] When the annular connecting plate drives the push claw assembly to move in the opposite direction through the transmission swing arm, the push claw assembly drives the clamping claw assembly to move radially and release.

[0023] Furthermore, a specific type of driving mechanism is provided, wherein the driving mechanism is a hydraulic cylinder, the hydraulic cylinder is fixed on the frame, the hydraulic cylinder comprises a cylinder body and a telescopic rod suitable for extension and retraction, and the telescopic end is arranged on the telescopic rod.

[0024] Furthermore, a specific structure of a clamping jaw assembly is provided, wherein the clamping jaw assembly comprises an adjusting slider and a conical jaw detachably connected by screws.

[0025] Further, the clamping surface is arranged on the conical claw, and the cross section of the clamping surface is arc-shaped, and the arc shape is suitable for matching with the outer diameter of the pipe;

[0026] Furthermore, an inlet and outlet guide box is fixed on the frame.

[0027] Furthermore, the clamping claw assemblies are provided with three.

[0028] Furthermore, an annular groove is provided on the outer peripheral surface of the hollow rotary shaft;

[0029] The hollow rotary shaft is also provided with a snap ring, which is embedded in and fixed in the annular groove;

[0030] The hollow rotary shaft is also sleeved with a guide sleeve fixing sleeve, one end of which is in contact with the clamping ring;

[0031] An inlet and outlet guide sleeve is also sleeved on the end of the hollow rotary shaft, and the inlet and outlet guide sleeve is detachably connected to the guide sleeve fixing sleeve by bolts;

[0032] A guide hole matching the inner diameter of the hollow rotary shaft is arranged inside the inlet and outlet guide sleeve.

[0033] By adopting the above technical solution, the utility model has the following beneficial effects:

[0034] In the utility model, when in use, the driving mechanism first drives the push claw assembly to move axially on the hollow rotary shaft through the transmission mechanism, and then the push claw assembly drives the clamping claw assembly to move radially through the oblique guide groove to complete the clamping and release of the pipe. After long-term use, the clamping claw assembly will wear out, resulting in pipe punching. At this time, it is only necessary to adjust the extension length of the adjustment joint on the transmission mechanism to compensate for the problems caused by wear, avoiding the cumbersome disassembly process. The adjustment time and labor intensity are greatly reduced, and at the same time, equipment failures such as loose screws and falling off of conical claws due to improper installation are avoided.

[0035] In addition, the clamping surface of the conical jaws in the clamping jaw assembly adopts an arc-shaped design, which ensures a good fit with the outer diameter of the pipe and significantly increases the stability and reliability of the clamping.

[0036] In summary, the utility model realizes the rapid adjustment of the tapered claw after wear, reduces the workload and adjustment time of the operator, and improves the safety and reliability of the equipment. These improvements not only optimize the production process, but also effectively extend the service life of the equipment, bringing significant economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a three-dimensional structural schematic diagram of the cold rolling mill jaw adjustment device of the utility model;

[0038] Figure 2 It is a front view of the cold rolling mill jaw adjustment device of the utility model;

[0039] Figure 3 for Figure 2 Sectional view of AA in the middle;

[0040] Figure 4 It is a partial exploded schematic diagram of the cold rolling mill jaw adjustment device of the utility model. DETAILED DESCRIPTION

[0041] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0042] like Figure 1-4 As shown, a cold rolling mill jaw adjustment device comprises:

[0043] Rack 1;

[0044] A hollow rotary shaft 2, the hollow rotary shaft 2 is rotatably mounted on the frame 1, and the outer circumferential surface of the hollow rotary shaft 2 is evenly provided with three linear guide grooves 21 extending in the axial direction;

[0045] The push claw assembly 3 is coaxially sleeved on the hollow rotary shaft 2, and the inner wall of the push claw assembly 3 is evenly provided with three oblique guide grooves 31 corresponding to the linear guide groove 21 along the circumferential direction;

[0046] Three clamping claw assemblies 4, the clamping claw assemblies 4 slide in the corresponding linear guide grooves 21, the clamping claw assemblies 4 are provided with a clamping surface facing the axis of the hollow rotary shaft 2, the clamping claw assemblies 4 are slidably matched with the conical surface of the oblique guide groove 31 of the corresponding push claw assembly 3, and the clamping claw assembly 4 is suitable for radially moving in the linear guide groove 21 driven by the push claw assembly 3;

[0047] A driving mechanism, the driving mechanism is mounted on the frame 1, the driving mechanism is provided with a telescopic end, and the telescopic end is provided with an adjustment hole;

[0048] The transmission mechanism is rotatably mounted on the push claw assembly 3, and one end of the transmission mechanism is hinged on the frame 1;

[0049] An adjusting joint 5, the adjusting joint 5 is threadedly connected in the adjusting hole, the adjusting joint 5 is hinged on the other end of the transmission mechanism, and the adjusting joint 5 is suitable for being actuated to adjust the extension length on the telescopic end of the transmission mechanism;

[0050] The driving mechanism is suitable for driving the push jaw assembly 3 to move in the axial direction of the hollow rotary shaft 2 through the transmission mechanism, thereby driving the clamping jaw assembly 4 to move radially to clamp or release the pipe.

[0051] In this embodiment, if Figure 1-3 As shown, when in use, the driving mechanism first drives the push claw assembly 3 to move axially on the hollow rotary shaft 2 through the transmission mechanism, and then the push claw assembly 3 drives the clamping claw assembly 4 to move radially through the oblique guide groove 31 to complete the clamping and release of the pipe. After long-term use, the clamping claw assembly 4 will wear out, resulting in pipe punching. At this time, it is only necessary to adjust the extension length of the adjustment joint 5 on the transmission mechanism to compensate for the problems caused by wear, avoiding the cumbersome disassembly process. The adjustment time and labor intensity are greatly reduced, and at the same time, equipment failures such as loose screws and falling off of the conical claw 42 due to improper installation are avoided.

[0052] Specifically, Figure 1-4 As shown, the push claw assembly 3 is provided with a main body section and an extended diameter reduction section, and a shaft shoulder is formed between the diameter reduction section and the main body section;

[0053] The transmission mechanism includes:

[0054] An annular connecting plate 61, which is rotatably mounted on the diameter reduction section of the push claw assembly 3 and abuts against the shaft shoulder. Both sides of the annular connecting plate 61 are provided with linear slider guide grooves extending in the circumferential direction;

[0055] A transmission swing arm 62, an extension arm is provided at the upper part of the transmission swing arm 62, a waist groove hinged to the adjustment joint 5 is provided on the extension arm, a lower fork arm is provided at the lower part of the transmission swing arm 62, and the lower fork arm is hinged to the frame 1;

[0056] A connecting frame is provided in the middle of the transmission swing arm 62;

[0057] Two sliders 63, the sliders 63 are hinged in the middle of the connecting frames on both sides of the transmission swing arm 62, and the sliders 63 are slidably matched with the linear slider guide grooves of the annular connecting plate 61;

[0058] When the driving mechanism drives the annular connecting plate 61 to abut against the push claw assembly 3 through the transmission swing arm 62, the push claw assembly 3 drives the clamping claw assembly 4 to contract radially and clamp;

[0059] When the annular connecting plate 61 drives the pushing claw assembly 3 to move in the opposite direction through the transmission swing arm 62, the pushing claw assembly 3 drives the clamping claw assembly 4 to move radially and release.

[0060] In this embodiment, if Figure 1-4 As shown, when it is necessary to clamp the pipe, the driving mechanism pushes the extension arm of the transmission swing arm 62 to swing through the adjusting joint 5, and the slider 63 hinged in the middle of the transmission swing arm 62 drives the annular connecting plate 61 to move, and the annular connecting plate 61 drives the push claw assembly 3 to move, and the inclined guide groove 31 on the push claw assembly 3 guides the clamping claw assembly 4 to contract inward, thereby clamping the pipe. Conversely, when it is necessary to loosen the pipe, the driving mechanism moves in the opposite direction, and the clamping claw assembly 4 is radially expanded through the same transmission method, thereby releasing the pipe.

[0061] Specifically, Figure 1 and Figure 3 As shown, the driving mechanism is a hydraulic cylinder, which is fixed on the frame 1. The hydraulic cylinder includes a cylinder body and a telescopic rod 7 suitable for extension and retraction, and the telescopic end is arranged on the telescopic rod 7.

[0062] In this embodiment, if Figure 3 As shown, by controlling the inflow and outflow of hydraulic oil, the position of the telescopic rod 7 can be accurately adjusted, thereby achieving accurate control of the clamping force of the claws. This design can not only adapt to pipes of different specifications, but also quickly adjust the clamping force according to actual needs.

[0063] Specifically, Figure 1-4 As shown, the clamping jaw assembly 4 includes an adjusting slider 41 and a conical jaw 42 which are detachably connected by screws.

[0064] Specifically, Figure 3 As shown, the clamping surface is arranged on the conical claw 42, and the cross section of the clamping surface is arc-shaped, and its arc shape is suitable for matching the outer diameter of the pipe;

[0065] In this embodiment, if Figure 1 and Figure 3-4 As shown, the split design of the adjusting slide block 41 and the conical clamping claw 42 can adapt to pipes of different specifications and is also convenient for maintenance and replacement.

[0066] The oblique guide groove 31 on the push claw assembly 3 plays a key guiding role. When the push claw assembly 3 moves, the oblique guide groove 31 guides the adjustment slider 41 and the tapered claw 42 to move radially, thereby achieving the action of clamping or loosening. The design that the adjustment slider 41 and the tapered claw 42 are detachably connected by screws not only facilitates adjustment and replacement, but also provides the possibility of adapting to pipes of different sizes. In addition, the arc design of the tapered claw 42 can perfectly match the outer diameter of the pipe, increase the contact area, and thus improve the stability and reliability of clamping. At the same time, the arc design can also reduce the risk of damage to the surface of the pipe, which is crucial to ensuring product quality.

[0067] Specifically, Figure 1 and Figure 3 As shown, an inlet and outlet guide box 12 is also fixed on the frame 1.

[0068] In this embodiment, if Figure 1 and Figure 3 As shown, the inlet and outlet guide box 12 provides precise guidance and support for the pipe to enter and exit. The main function of the inlet and outlet guide box 12 is to guide the pipe to enter and leave the processing area smoothly. It effectively prevents the pipe from deflecting or deforming. At the same time, the guide box can also play a role in preliminary positioning, so that the pipe is in the correct position and angle before entering the clamping area.

[0069] Specifically, Figure 2 As shown, three clamping jaw assemblies 4 are provided.

[0070] Of course, in some embodiments, the number of the clamping jaw assemblies 4 is not limited to three.

[0071] Specifically, Figure 3 As shown, an annular groove is provided on the outer peripheral surface of the hollow rotary shaft 2;

[0072] The hollow rotary shaft 2 is also provided with a snap ring 8, which is embedded in and fixed in the annular snap groove;

[0073] A guide sleeve fixing sleeve 9 is also sleeved on the hollow rotary shaft 2, and one end of the guide sleeve fixing sleeve 9 is in contact with the clamping ring 8;

[0074] An inlet and outlet guide sleeve 91 is also sleeved on the end of the hollow rotary shaft 2, and the inlet and outlet guide sleeve 91 is detachably connected to the guide sleeve fixing sleeve 9 by bolts;

[0075] A guide hole matching the inner diameter of the hollow rotary shaft 2 is provided inside the inlet and outlet guide sleeve 91 .

[0076] In this embodiment, if Figure 3As shown, the inner guide hole of the inlet and outlet guide sleeve 91 matches the inner diameter of the hollow rotary shaft 2. This design ensures the stability and accuracy of the pipe during the inlet and outlet process. It can reduce the friction between the pipe and the equipment.

[0077] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cold rolling mill jaw adjustment device, characterized in that: include: Rack (1); A hollow rotary shaft (2), the hollow rotary shaft (2) being rotatably mounted on the frame (1), the outer circumferential surface of the hollow rotary shaft (2) being evenly provided with at least two linear guide grooves (21) extending in the axial direction along the circumferential direction; A push claw assembly (3), wherein the push claw assembly (3) is coaxially sleeved on the hollow rotary shaft (2), and the inner wall of the push claw assembly (3) is evenly provided with at least two oblique guide grooves (31) corresponding to the linear guide groove (21) along the circumferential direction; At least two clamping claw assemblies (4), the clamping claw assemblies (4) sliding in the corresponding linear guide grooves (21), the clamping claw assemblies (4) being provided with a clamping surface facing the axis of the hollow rotary shaft (2), the clamping claw assemblies (4) slidingly matching with the conical surface of the corresponding oblique guide groove (31) of the pushing claw assemblies (3), the clamping claw assemblies (4) being adapted to move radially in the linear guide grooves (21) driven by the pushing claw assemblies (3); A driving mechanism, the driving mechanism being mounted on the frame (1), the driving mechanism being provided with a telescopic end, and the telescopic end being provided with an adjustment hole; A transmission mechanism, the transmission mechanism being rotatably mounted on the push claw assembly (3), and one end of the transmission mechanism being hinged on the frame (1); an adjusting joint (5), the adjusting joint (5) being threadedly connected in the adjusting hole, the adjusting joint (5) being hinged on the other end of the transmission mechanism, and the adjusting joint (5) being adapted to be actuated to adjust the extension length at the telescopic end of the transmission mechanism; The driving mechanism is suitable for driving the push claw assembly (3) to move in the axial direction of the hollow rotary shaft (2) through the transmission mechanism, thereby driving the clamping claw assembly (4) to move radially to clamp or loosen the pipe.

2. The cold rolling mill jaw adjustment device according to claim 1, characterized in that: The push claw assembly (3) is provided with a main body section and an extended diameter-reduced section, and a shaft shoulder is formed between the diameter-reduced section and the main body section; The transmission mechanism comprises: an annular connecting plate (61), the annular connecting plate (61) being rotatably mounted on the diameter-reducing section of the push claw assembly (3) and abutting against the shaft shoulder, and linear slider guide grooves extending in the circumferential direction are provided on both sides of the annular connecting plate (61); A transmission swing arm (62), wherein an extension arm is provided at the upper portion of the transmission swing arm (62), wherein a waist groove is provided on the extension arm and is hingedly connected to the adjustment joint (5), and a lower fork arm is provided at the lower portion of the transmission swing arm (62), wherein the lower fork arm is hingedly connected to the frame (1); A connecting frame is provided in the middle of the transmission swing arm (62); At least one slider (63), the slider (63) being hinged in the middle of the connection frame of the transmission swing arm (62), the slider (63) being slidably matched with the linear slider guide groove of the annular connection plate (61); When the driving mechanism drives the annular connecting plate (61) to abut against the pushing claw assembly (3) through the transmission swing arm (62), the pushing claw assembly (3) drives the clamping claw assembly (4) to contract radially and clamp; When the annular connecting plate (61) drives the pushing claw assembly (3) to move in the opposite direction via the transmission swing arm (62), the pushing claw assembly (3) drives the clamping claw assembly (4) to move radially and release.

3. The cold rolling mill jaw adjustment device according to claim 1, characterized in that: The driving mechanism is a hydraulic cylinder, which is fixed on the frame (1). The hydraulic cylinder comprises a cylinder body and a telescopic rod (7) suitable for telescoping, and the telescopic end is arranged on the telescopic rod (7).

4. The cold rolling mill jaw adjustment device according to claim 1, characterized in that: The clamping jaw assembly (4) comprises an adjusting slider (41) and a conical clamping jaw (42) which are detachably connected via screws.

5. The cold rolling mill jaw adjustment device according to claim 4, characterized in that: The clamping surface is arranged on the conical claw (42), and the cross section of the clamping surface is arc-shaped, and the arc shape is suitable for matching with the outer diameter of the pipe.

6. The cold rolling mill jaw adjustment device according to claim 1, characterized in that: An inlet and outlet guide box (12) is also fixed on the frame (1).

7. The cold rolling mill jaw adjustment device according to claim 1, characterized in that: The clamping claw assemblies (4) are provided with three.

8. The cold rolling mill jaw adjustment device according to claim 1, characterized in that: An annular groove is provided on the outer peripheral surface of the hollow rotary shaft (2); The hollow rotary shaft (2) is also provided with a snap ring (8), and the snap ring (8) is embedded in and fixed in the annular snap groove; A guide sleeve fixing sleeve (9) is also sleeved on the hollow rotary shaft (2), and one end of the guide sleeve fixing sleeve (9) is in contact with the clamping ring (8); An inlet and outlet guide sleeve (91) is also sleeved on the end of the hollow rotary shaft (2), and the inlet and outlet guide sleeve (91) is detachably connected to the guide sleeve fixing sleeve (9) by bolts; The inlet and outlet guide sleeve (91) is provided with a guide hole matching the inner diameter of the hollow rotary shaft (2).

Images