A special equipment for machining key groove of bending roll block of cold rolling mill on line
By designing an online machining equipment with a "U"-shaped machine tool frame and double symmetrical milling cutters, the problems of broken fastening bolts of the cold rolling mill roll shifting device and keyway machining of bent roll blocks were solved, realizing efficient and low-cost online machining and improving the production efficiency and equipment stability of the cold rolling mill.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANXI BUYEASY MACHINERY MFG
- Filing Date
- 2026-06-03
- Publication Date
- 2026-06-30
AI Technical Summary
The fastening bolts of the existing cold rolling mill roll shifting device break frequently, resulting in low production efficiency. Furthermore, the existing online processing equipment is unable to efficiently process the keyway of the bent roll block in a confined space, increasing the cost of modification and the difficulty of operation.
Design an online machining equipment with a "U"-shaped machine tool frame structure, adopting a detachable installation method, and combining a double symmetrical milling cutter and an electric linear guide system to achieve efficient online machining of keyways on curved roller blocks.
It improved processing accuracy and efficiency, reduced equipment costs, simplified operating procedures, and ensured the stable operation of the cold rolling mill and product quality.
Smart Images
Figure CN122299052A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of machining technology for cold rolling mills, and specifically to a special equipment for online machining of keyways in bent roll blocks of cold rolling mills. Background Technology
[0002] Cold rolling mills are crucial equipment in steel production, playing a key role in the performance of steel products and significantly impacting their application and quality. During cold rolling, the mill's performance determines the precise control of parameters such as rolling force and roll gap, enabling high-precision control of strip thickness and width. Stable cold rolling quality allows for further grain refinement of the steel during rolling, thus improving its mechanical properties. The roll shifting device is a core component of the cold rolling mill. Its movement causes axial displacement of the rolls, altering the roll gap shape and stress distribution to improve strip shape and quality. By axially moving the rolls, the device changes the contact length and pressure distribution between the rolls and the strip. Therefore, periodic axial movement of the rolls using this device evens out surface wear, effectively preventing excessive localized wear and extending the roll's lifespan. Whether the roll shifting device can work accurately and stably directly affects the stable operation of cold rolling mill equipment and product quality.
[0003] The existing connection structure of the roll shifting device in a cold rolling mill is as follows: two roll shifting bases at both ends of the device are fastened to two bent roll blocks on both sides of the archway by fastening bolts. During operation, these fastening bolts frequently break, severely impacting the normal operation of the cold rolling mill. The common solution is to dismantle the roll shifting device, remove the broken fastening bolts online, replace them with new ones, and reposition and reassemble the device. This disassembly and reassembly is time-consuming and labor-intensive, but the bolt breakage recurs after a period of use, significantly affecting the mill's production efficiency. To completely resolve the problem of frequent bolt breakage in the roll shifting device, the cold rolling mill decided to redesign the fastening connection between the roll shifting bases and the bent roll blocks. Based on the operating conditions and structural mechanics analysis of the roll shifting device, a vertical positioning key was added between the roll shifting bases and the bent roll blocks. This key bears the axial force of the roll shifting bases and shares the shear force on the fastening bolts.
[0004] The key to the redesign and modification scheme lies in machining keyways on the roll shifting base and the bending roll block. The roll shifting base is a relatively small part, easy to disassemble and assemble, and can be machined offline. However, the bending roll block is mounted on the archway and contains other components, requiring high installation precision and making disassembly and assembly cumbersome and difficult. Therefore, the keyways on the bending roll block need to be machined online. To achieve online machining of the keyways on the bending roll block based on the existing spatial structure of the cold rolling mill, a dedicated online machining equipment for this purpose needs to be designed and manufactured. Currently, many cold rolling mills in operation in my country have a widespread need for upgrading and modifying their roll shifting devices. Therefore, designing and manufacturing a dedicated online machining equipment for the keyways on the bending roll blocks of cold rolling mills, thereby reducing machining and modification costs and improving machining and modification efficiency, is a very meaningful endeavor. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a special equipment for online processing of keyways in curved roll blocks of cold rolling mills. The equipment has a novel structure, practical functions, is lightweight and convenient, and can realize online processing of keyways in curved roll blocks with low processing cost and high processing efficiency.
[0006] The technical solution adopted in this invention is: a special equipment for online processing of keyways in bent roll blocks of cold rolling mills, comprising a machine tool frame and a processing machine tool. The machine tool frame is a "U"-shaped component, including two vertical connecting arms and one horizontal mounting arm. The processing machine tool includes a machine tool base, a first electric linear guide, a second electric linear guide, a machine tool stand, a third electric linear guide, a power motor, a transmission box, a machine tool spindle, and a keyway milling cutter. Two vertical connecting arms are detachably mounted on the upper ends of the horizontal mounting arm via fastening bolts. Each of the two vertical connecting arms is detachably connected to one of the two curved roller blocks via fastening bolts. The slide of the first electric linear guide is fixedly connected to the machine tool base. The slide of the second electric linear guide is fixedly connected to the slider of the first electric linear guide. The machine tool stand is fixedly connected to the slider of the second electric linear guide. The slide of the third electric linear guide is fixedly connected to the machine tool stand. The transmission box is fixedly connected to the slider of the third electric linear guide. The machine tool spindle is mounted on the transmission box and is rotatably connected to the transmission box via bearings. Both ends of the machine tool spindle extend to the outside of the transmission box. The power motor is fixedly mounted on the transmission box, and the output shaft of the power motor is connected to the machine tool spindle via the transmission box. Two keyway milling cutters are symmetrically fixedly mounted at both ends of the machine tool spindle. The machine tool base is detachably mounted on the upper center of the horizontal mounting arm by fastening bolts.
[0007] A further improvement is that multiple connecting reference plates are provided on the mounting side of the vertical connecting arm. An upper frame adjustment plate is provided at the upper end of the mounting side of the vertical connecting arm, and a lower frame mounting plate is provided at the lower end. Adjusting screws are threaded on the upper frame adjustment plate. The connecting reference plate is in close contact with the side of the bending roller block. The front end of the adjusting screw on the upper frame adjustment plate is in close contact with the top surface of the bending roller block, and the lower frame mounting plate is in close contact with the bottom surface of the bending roller block.
[0008] A further improvement is that an installation reference block is installed in the middle of the upper part of the horizontal mounting arm, and a machine tool adjustment block is installed on the installation reference block. An adjustment screw is threaded on the machine tool adjustment block. The machine tool base is detachably installed on the installation reference block by fastening bolts. The front end of the adjustment screw on the machine tool adjustment block is in close contact with the machine tool base. Side frame fastening plates are provided on both sides of the horizontal mounting arm. Set screws are threaded on the side frame fastening plates, and the front end of the set screws on the side frame fastening plates is in close contact with the frame.
[0009] A further improvement is that the first electric linear guide is fixedly mounted on the machine tool base via its slide, the second electric linear guide is fixedly mounted on the slider of the first electric linear guide via its slide, the second electric linear guide is perpendicularly intersecting the first electric linear guide, the machine tool stand is fixedly mounted on the slider of the second electric linear guide, the third electric linear guide is fixedly mounted on the side of the machine tool stand via its slide, the third electric linear guide is perpendicularly intersecting the second electric linear guide, the transmission box is fixedly mounted on the slider of the third electric linear guide, and the machine tool spindle is perpendicularly intersecting the third electric linear guide.
[0010] Compared with the prior art, the present invention has the following advantages: 1. The machine tool frame adopts a U-shaped structure, which has strong load-bearing capacity and high resistance to deformation, and can meet the rigidity requirements of online machining equipment for the machining accuracy of the machine tool frame. 2. The machine tool frame and the processing machine tool adopt a detachable installation method, which realizes convenient disassembly and assembly of online processing special equipment in the existing space structure of cold rolling mill. The equipment is compact, and the combination, disassembly and adjustment operation is convenient and quick, and the installation and fixation are firm and reliable.
[0011] 3. The use of a double-symmetrical milling cutter structure can save the milling cutter turning mechanism in online machining equipment, reduce installation space, and lower production costs.
[0012] 4. The use of a machine tool with double symmetrical milling cutters for online machining enables convenient and quick simultaneous milling of the keyways of the two curved roll blocks on both sides of the archway within the existing spatial structure of the cold rolling mill. The structure is practical and functional, ensuring machining accuracy and improving machining efficiency. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 2 for Figure 1 Left view, Figure 3 This is a three-dimensional structural diagram of the present invention. Figure 4 This is a three-dimensional structural diagram of the machine tool frame in this invention. Figure 5 This is a three-dimensional structural diagram of the machine tool used in this invention. Detailed Implementation
[0014] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.
[0015] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a special equipment for online processing of keyways in bent roll blocks of cold rolling mills includes a machine tool frame 1 and a processing machine tool 2. The machine tool frame 1 is a U-shaped component, comprising two vertical connecting arms 11 and one horizontal mounting arm 12. Both the vertical connecting arms 11 and the horizontal mounting arm 12 are steel frame components, constructed from multiple steel plates and shaped steel sections welded together. Process holes are machined into the steel plates to reduce weight and relieve stress. This steel frame component of the vertical connecting arms 11 and the horizontal mounting arm 12, after welding assembly, stress relief through aging, rough machining, and precision machining, possesses advantages such as high mechanical strength, light weight, strong vibration absorption capacity, and high machining accuracy. The two vertical connecting arms 11 are detachably mounted on the upper ends of the horizontal mounting arm 12 using fastening bolts. Each of the two vertical connecting arms 11 is detachably connected to two bending roll blocks using fastening bolts. The vertical connecting arms 11 and the horizontal mounting arm 12 are detachably assembled together using fastening bolts, and then detachably connected to the bending roll blocks using fastening bolts. The installation and connection are firm and reliable, and assembly and disassembly are convenient and easy. It has strong load-bearing capacity and high resistance to deformation, which facilitates the convenient assembly and disassembly of the machine tool frame 1 within the existing spatial structure of the cold rolling mill. Multiple connecting reference plates 111 are provided on the mounting side of the vertical connecting arm 11. An upper frame adjusting plate 112 is provided at the upper end of the mounting side of the vertical connecting arm 11, and a lower frame mounting plate 113 is provided at the lower end. Adjusting screws are threaded onto the upper frame adjusting plate 112. The connecting reference plates 111 are in close contact with the side of the bending roller block. The connecting reference plates 111 on the vertical connecting arm 11 improve both the machining accuracy of the vertical connecting arm 11 and the fixed connection accuracy between the vertical connecting arm 11 and the bending roller block. The front end of the adjusting screw on the upper frame adjusting plate 112 is in close contact with the top surface of the bending roller block, and the lower frame mounting plate 113 is in close contact with the bottom surface of the bending roller block. Rotating the adjusting screw on the upper frame adjusting plate 112 adjusts the mounting position accuracy between the machine tool frame 1 and the bending roller block. A mounting reference block 121 is installed at the center of the upper part of the horizontal mounting arm 12. A machine tool adjusting block 122 is mounted on the mounting reference block 121, and an adjusting screw is threaded onto the machine tool adjusting block 122. The machine tool base 21 is detachably mounted on the mounting reference block 121 by fastening bolts. The front end of the adjusting screw on the machine tool adjusting block 122 is in close contact with the machine tool base 21. Rotating the adjusting screw on the machine tool adjusting block 122 can adjust the installation position accuracy of the machining tool 2 and the machine tool frame 1. Side frame fixing plates 123 are provided on both sides of the horizontal mounting arm 12. Set screws are threaded onto the side frame fixing plates 123, and the front end of the set screws on the side frame fixing plates 123 is in close contact with the frame. Tightening the set screws on the side frame fixing plates 123 can increase the connection firmness between the machine tool frame 1 and the bending roller block. The machine tool 2 includes a machine tool base 21, a first electric linear guide 22, a second electric linear guide 23, a machine tool stand 24, a third electric linear guide 25, a power motor 26, a transmission box 27, a machine tool spindle 28, and a keyway milling cutter 29. The electric linear guide, as is well known to those skilled in the art, is used to support and guide moving components to perform reciprocating linear motion in a given direction. The electric linear guide mainly includes a motor, a lead screw, a slider, and a slide block. The motor drives the lead screw to rotate, causing the slider to perform reciprocating linear motion on the slide block. The slide block of the first electric linear guide 22 is fixedly connected to the machine tool base 21. The slide block of the second electric linear guide 23 is fixedly connected to the slider of the first electric linear guide 22. The machine tool stand 24 is fixedly connected to the slider of the second electric linear guide 23. The slide block of the third electric linear guide 25 is fixedly connected to the machine tool stand 24. The transmission box 27 is fixedly connected to the slider of the third electric linear guide 25. The first electric linear guide 22 is fixedly mounted on the machine tool base 21 via its slide. The second electric linear guide 23 is fixedly mounted on the slider of the first electric linear guide 22 via its slide. The second electric linear guide 23 is perpendicularly intersecting the first electric linear guide 22. The first electric linear guide 22 drives the second electric linear guide 23 to perform horizontal reciprocating linear motion on it. The machine tool stand 24 is fixedly mounted on the slider of the second electric linear guide 23. The third electric linear guide 25 is fixedly mounted on the machine tool stand via its slide. On the side of the machine tool stand 24, the third electric linear guide 25 is perpendicularly intersecting the second electric linear guide 23. The second electric linear guide 23 drives the machine tool stand 24 and the third electric linear guide 25 to perform horizontal longitudinal reciprocating linear motion on it. The transmission box 27 is fixedly installed on the slider of the third electric linear guide 25. The machine tool spindle 28 is installed on the transmission box 27. The machine tool spindle 28 is perpendicularly intersecting the third electric linear guide 25. The third electric linear guide 25 drives the transmission box 27 and the machine tool spindle 28 to perform vertical reciprocating linear motion on it. The machine tool spindle 28 is rotatably connected to the transmission box 27 via bearings. Both ends of the machine tool spindle 28 extend to the outside of the transmission box 27. The power motor 26 is fixedly mounted on the transmission box 27. The output shaft of the power motor 26 is connected to the machine tool spindle 28 via the transmission box 27. Two keyway milling cutters 29 are symmetrically fixedly mounted at both ends of the machine tool spindle 28. The transmission box 27 consists of a housing and a gear transmission mechanism. The power motor 26 is fixedly mounted on the housing. The output shaft of the power motor 26 drives the machine tool spindle 28 to rotate via the gear transmission mechanism, thereby driving the keyway milling cutters 29 to perform rotary milling.
[0016] The assembly and use process of this specialized online processing equipment for keyway machining of cold rolling mill bending roll blocks is as follows: First, the machine tool frame 1 is assembled and installed. Two vertical connecting arms 11 and one horizontal mounting arm 12 are fastened together using bolts. Then, the machine tool frame 1 is fixedly installed on the bending roll block. The two vertical connecting arms 11 are respectively fixedly connected to the two bending roll blocks using bolts. The adjusting screws on the upper frame adjusting plate 112 are rotated to adjust the levelness of the upper plane of the alignment mounting reference block 121 and its perpendicularity to the keyway machining plane of the bending roll block. The alignment accuracy is 0.02mm over a horizontal length of 150mm and 0.03mm over a vertical length of 230mm. Finally, the processing machine tool 2 is fixedly installed on the mounting reference block 121 using bolts. The adjusting screws on the machine tool adjusting block 122 are rotated to adjust the perpendicularity of the machine tool spindle 28 to the keyway machining plane of the bending roll block. The alignment accuracy is 0.03mm over a vertical length of 230mm. The motors of the first electric linear guide 22, the second electric linear guide 23, the third electric linear guide 25, and the power motor 26 are started and run. The first electric linear guide 22, the second electric linear guide 23, and the third electric linear guide 25 work together to drive the machine tool spindle 28 to perform horizontal transverse, horizontal longitudinal, and vertical reciprocating linear motion. The power motor 26 drives the two keyway milling cutters 29 at both ends of the machine tool spindle 28 to perform rotary milling at the same time, and mills the keyways of the two curved roller blocks on both sides of the archway in the same step.
[0017] Not limited to this, any variations or substitutions conceived without inventive effort should be included within the scope of protection of this invention. Therefore, the scope of protection of this invention should be determined by the scope defined in the claims.
Claims
1. A specialized device for online processing of keyways in bent roll blocks of cold rolling mills, characterized in that, The machine tool includes a machine tool frame (1) and a machine tool (2). The machine tool frame (1) is a "U"-shaped component, including two vertical connecting arms (11) and a horizontal mounting arm (12). The machine tool (2) includes a machine tool base (21), a first electric linear guide (22), a second electric linear guide (23), a machine tool stand (24), a third electric linear guide (25), a power motor (26), a transmission box (27), a machine tool spindle (28), and a keyway milling cutter (29). The two vertical connecting arms (11) are detachably connected to two curved roller blocks by fastening bolts. The machine tool base (21) is detachably mounted above the middle of the horizontal mounting arm (12) by fastening bolts.
2. The special equipment for online processing of keyways in bent roll blocks of cold rolling mills according to claim 1, characterized in that, Two vertical connecting arms (11) are detachably mounted on the upper ends of the horizontal mounting arm (12) by fastening bolts.
3. The special equipment for online processing of keyways in bent roll blocks of cold rolling mills according to claim 2, characterized in that, Both the vertical connecting arm (11) and the horizontal mounting arm (12) are steel structure frame components.
4. The special equipment for online processing of keyways in bent roll blocks of cold rolling mills according to claim 1, characterized in that, The slide of the first electric linear guide (22) is fixedly connected to the machine tool base (21). The slide of the second electric linear guide (23) is fixedly connected to the slider of the first electric linear guide (22). The machine tool stand (24) is fixedly connected to the slider of the second electric linear guide (23). The slide of the third electric linear guide (25) is fixedly connected to the machine tool stand (24). The transmission box (27) is fixedly connected to the slider of the third electric linear guide (25). The machine tool spindle (28) is mounted on the transmission box (27). The machine tool spindle (28) is rotatably connected to the transmission box (27) through bearings. Both ends of the machine tool spindle (28) extend to the outside of the transmission box (27). The power motor (26) is fixedly mounted on the transmission box (27). The output shaft of the power motor (26) is connected to the machine tool spindle (28) through the transmission box (27). Two keyway milling cutters (29) are symmetrically fixedly mounted on both ends of the machine tool spindle (28).
5. The special equipment for online processing of keyways in cold rolling mill bent roll blocks according to claim 3, characterized in that, The mounting side of the vertical connecting arm (11) is provided with multiple connecting reference plates (111). The upper end of the mounting side of the vertical connecting arm (11) is provided with an upper frame adjustment plate (112), and the lower end is provided with a lower frame mounting plate (113). The connecting reference plate (111) is in close contact with the side of the bending roller block, and the lower frame mounting plate (113) is in close contact with the bottom surface of the bending roller block.
6. The special equipment for online processing of keyways in bent roll blocks of cold rolling mills according to claim 5, characterized in that, An adjusting screw is threaded on the upper frame adjusting plate (112), and the front end of the adjusting screw on the upper frame adjusting plate (112) is in close contact with the top surface of the bending roller block.
7. The special equipment for online processing of keyways in bent roll blocks of cold rolling mills according to claim 3, characterized in that, A mounting reference block (121) is installed in the middle above the horizontal mounting arm (12). A machine tool adjustment block (122) is installed on the mounting reference block (121). An adjustment screw is threaded on the machine tool adjustment block (122). The machine tool base (21) is detachably mounted on the mounting reference block (121) by fastening bolts. The front end of the adjustment screw on the machine tool adjustment block (122) is in close contact with the machine tool base (21).
8. The special equipment for online processing of keyways in bent roll blocks of cold rolling mills according to claim 3, characterized in that, The two sides of the horizontal mounting arm (12) are provided with side frame fastening plates (123), and fastening screws are threaded on the side frame fastening plates (123). The front end of the fastening screws on the side frame fastening plates (123) is in close contact with the archway.
9. A special equipment for online processing of keyways in bent roll blocks of cold rolling mills according to claim 4, characterized in that, The first electric linear guide (22) is fixedly mounted on the machine tool base (21) via its slide. The second electric linear guide (23) is fixedly mounted on the slider of the first electric linear guide (22) via its slide. The second electric linear guide (23) is perpendicularly intersecting the first electric linear guide (22). The machine tool stand (24) is fixedly mounted on the slider of the second electric linear guide (23). The third electric linear guide (25) is fixedly mounted on the side of the machine tool stand (24) via its slide. The third electric linear guide (25) is perpendicularly intersecting the second electric linear guide (23). The transmission box (27) is fixedly mounted on the slider of the third electric linear guide (25). The machine tool spindle (28) is perpendicularly intersecting the third electric linear guide (25).