A new type of double-head roll neck grinder

Abstract

The utility model relates to the technical field of roll neck processing, and disclose a novel double -grinding -head roll neck grinding machine, including lathe, the upper surface fixed mounting of lathe has two groups of bracket, the upper surface of bracket is opened arc -shaped groove, the upper surface of both ends of lathe is provided with headstock module and tailstock module that two roll neck end portions of roll are positioned accurately synchronously respectively, the upper surface sliding mounting of lathe has two groups of slide. The novel double -grinding -head roll neck grinding machine, through setting up symmetrical arrangement's headstock module, tailstock module and double -slip plate and mill disc structure, realized heavy -duty roll under the first clamping to complete two -end roll neck synchronous or sequential precision grinding, avoided the process restriction of traditional single -grinding -head grinder because of structure interference and must turn around and process, thereby shortened the overall processing time, ensured the high concentricity requirement of double roll neck simultaneously, solved the problem that the low efficiency of turning around and processing and the concentricity of prior art is difficult to guarantee.

Description

Technical Field

[0001] This utility model relates to the field of roll neck processing technology, specifically a novel double-head roll neck grinding machine. Background Technology

[0002] Rolls are the core components of rolling mills, and their manufacturing precision directly affects the quality of rolled plates. With the development of modern metallurgical industry, rolling mills designed for rolling large, thick steel plates have become increasingly sophisticated. The rolls used in modern rolling mills for rolling large, thick steel plates are enormous, with an overall weight of over 20 tons. In particular, the diameter deviation between the roll body and the roll neck is quite large. Due to the limitations of the existing external cylindrical grinding machine spindle structure, interference often occurs on one side during the precision grinding of the two roll necks. In this case, the only solution is to reverse the rolling process, but reversing the rolling process not only prolongs the processing time but also makes it difficult to guarantee the concentricity of the two roll necks. Therefore, we propose a new type of double-head rolling mill roll neck grinding machine. Utility Model Content

[0003] The purpose of this invention is to provide a novel double-headed roll neck grinding machine to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a novel double-headed roll neck grinding machine, comprising a machine tool, two sets of brackets fixedly mounted on the upper surface of the machine tool, an arc-shaped groove formed on the upper surface of the brackets, a headstock module and a tailstock module respectively provided on the upper surfaces of both ends of the machine tool for precise synchronous positioning of the two roll neck ends, two sets of sliding plates slidably mounted on the upper surface of the machine tool, a grinding head motor provided on the upper surface of the sliding plates, a grinding disc fixedly connected to the output end of the grinding head motor via a coupling, a drive module for controlling the working position of the grinding disc on the upper surface of the machine tool, and a support module for auxiliary stabilizing support of the roll neck provided on the inner surface of the arc-shaped groove.

[0005] Preferably, the headstock module includes a headstock box fixedly mounted on the upper surface of the machine tool, a servo motor is fixedly mounted on the inner wall of the machine tool, a synchronous pulley is fixedly connected to the output end of the servo motor, a synchronous pulley is connected to the synchronous pulley via a synchronous belt, a headstock spindle is rotatably mounted on the inner wall of the headstock box, a four-jaw chuck is fixedly mounted at the end of the headstock spindle, a headstock center is provided at the axis of the four-jaw chuck, and a reduction gear structure is provided inside the headstock box.

[0006] Preferably, the deceleration structure includes multiple gear sets, which are respectively sleeved on the outer wall of the head frame main shaft and the rotating shaft of the second synchronous wheel, and the gear sets mesh with each other for transmission.

[0007] Preferably, the tailstock module includes a tailstock box movably mounted on the upper surface of the machine tool. A mounting rod is fixedly mounted on the bottom side wall of the tailstock box. A servo motor II is movably mounted on the outer wall of the mounting rod via a slider. A pinion is fixedly connected to the output end of the servo motor II. A rack is fixedly mounted on the side wall of the machine tool. The pinion meshes with the rack to achieve transmission. A hydraulic mechanism is fixedly mounted on the top side wall of the tailstock box. A locking screw is provided inside the side of the tailstock box. A locking wrench is provided on the top of the tailstock box. A sleeve is fixedly connected to the output end of the hydraulic mechanism. The side wall of the sleeve is movably connected to the locking wrench. A tailstock tip is provided at the end of the sleeve away from the hydraulic mechanism.

[0008] Preferably, the drive module includes a servo motor three fixedly mounted on the upper surface of the machine tool. The output end of the servo motor three is fixedly connected to a ball screw one via a coupling. A ball slider one is drivenly connected to the outer wall of the ball screw one. The top of the ball slider one is fixedly connected to the bottom surface of the slide plate. A flat guide rail and a V-shaped guide rail are fixedly mounted parallel to each other on the upper surface of the machine tool. A servo motor four is fixedly mounted on the upper surface of the slide plate. The output end of the servo motor four is fixedly connected to a ball screw two via a coupling. A ball slider two is drivenly connected to the outer wall of the ball screw two. A support plate is fixedly connected to the top outer wall of the ball slider two. The support plate is slidably connected to the upper surface of the slide plate.

[0009] Preferably, the lower surface of the slide plate is provided with a guide groove that is compatible with the flat guide rail and the V-shaped guide rail, and the axis of the first ball screw is perpendicular to the axis of the second ball screw.

[0010] Preferably, the support module includes an upper mounting ear fixedly installed on the inner wall of the top of the arc-shaped groove, a short contact roller rotatably mounted on the end of the upper mounting ear, a lower mounting ear fixedly installed on the inner wall of the arc-shaped groove, a long contact roller rotatably connected to the end of the lower mounting ear, and spiral grooves formed on the outer arc surfaces of both the short contact roller and the long contact roller.

[0011] Preferably, the long contact roller includes two coaxially connected roller sleeves, which are distributed in an isosceles triangle shape with the short contact roller. The spiral grooves on the outer arc surfaces of the two roller sleeves have opposite spiral directions. At the same time, three lower mounting ears are provided, which are respectively located at the center and both ends of the long contact roller.

[0012] Compared with the prior art, this utility model provides a novel double-head roll neck grinding machine, which has the following beneficial effects: 1. This novel double-head mill roll neck grinding machine, through the symmetrical arrangement of headstock module, tailstock module and double slide plate and grinding disc structure, realizes the synchronous or sequential precision grinding of both ends of the heavy roll in one clamping, avoiding the process limitation of traditional single-head mill grinding machines that must be turned around for processing due to structural interference, thereby shortening the overall processing time, while ensuring the high concentricity requirement of the double roll neck, solving the problems of low turning processing efficiency and difficulty in ensuring concentricity in the existing technology.

[0013] 2. This novel double-head roll neck grinding machine, by setting up a support module with short contact rolls and long contact rolls, and the contact rolls having spiral grooves on their surfaces to form rolling contact with the roll neck, provides stable, low-resistance auxiliary support for the roll during the grinding process and has a self-cleaning function. This effectively disperses the load of the roll weight on the headstock and tailstock, suppresses processing vibration, and improves the stability of the grinding process and the final processing accuracy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the head frame module structure of this utility model; Figure 3 This is one of the schematic diagrams of the tailstock module structure of this utility model; Figure 4 This is the second schematic diagram of the tailstock module structure of this utility model; Figure 5 This is a partial structural diagram of the present invention; Figure 6 This is a schematic diagram of the skateboard structure of this utility model; Figure 7 This is a schematic diagram of the bracket structure of this utility model; Figure 8 This is a schematic diagram of the support module structure of this utility model.

[0015] In the diagram: 1. Machine tool; 2. Bracket; 3. Headstock module; 31. Headstock box; 32. Servo motor one; 33. Synchronous pulley one; 34. Synchronous belt; 35. Synchronous pulley two; 36. Headstock spindle; 37. Four-jaw chuck; 38. Headstock center; 39. Reduction mechanism; 4. Tailstock module; 41. Tailstock box; 42. Mounting rod; 43. Servo motor two; 44. Pinion; 45. Gear rack; 46. Hydraulic mechanism; 47. Locking screw; 48. Locking wrench; 9. Tailstock center; 5. Drive module; 51. Servo motor three; 52. Ball screw one; 53. Ball slider one; 54. Flat guide rail; 55. V-shaped guide rail; 56. Servo motor four; 57. Ball screw two; 58. Ball slider two; 59. Support plate; 6. Slide plate; 7. Grinding head motor; 8. Grinding disc; 9. Support module; 21. Arc groove; 91. Upper mounting ear; 92. Short contact roller; 93. Lower mounting ear; 94. Long contact roller; 95. Spiral groove. Detailed Implementation

[0016] like Figures 1-8 As shown, this utility model provides a technical solution: a novel double-headed roll neck grinding machine, including a machine tool 1. Two sets of brackets 2 are fixedly installed on the upper surface of the machine tool 1. The upper surface of the brackets 2 is provided with an arc-shaped groove 21. The upper surfaces of both ends of the machine tool 1 are respectively provided with a headstock module 3 and a tailstock module 4 for precise synchronous positioning of the ends of the two roll necks. Two sets of slide plates 6 are slidably installed on the upper surface of the machine tool 1. A grinding head motor 7 is provided on the upper surface of the slide plate 6. The output end of the grinding head motor 7 is fixedly connected to a grinding disc 8 through a coupling. A drive module 5 is provided on the upper surface of the machine tool 1 to control the working position of the grinding disc 8 on the upper surface of the machine tool 1. A support module 9 is provided on the inner surface of the arc-shaped groove 21 to provide auxiliary stable support for the roll neck.

[0017] The headstock module 3 and tailstock module 4 clamp and center the rolls from both ends, ensuring that the rolls maintain stable rotation during processing and that the two roll necks are on the same axis of rotation. The two sets of slide plates 6 move longitudinally and laterally on the machine tool 1 through the drive module 5, driving the grinding head motor 7 and its connected grinding disc 8 to be positioned at the grinding positions of the two roll necks respectively, so that the synchronous or sequential processing of the roll necks at both ends can be completed in one clamping. The support module 9 is set in the arc groove 21 of the bracket 2, providing additional contact support for the roll necks during grinding, reducing the load on the headstock module 3 and tailstock module 4, suppressing processing vibration, and improving grinding accuracy and stability.

[0018] Please see Figure 2The headstock module 3 includes a headstock box 31 fixedly installed on the upper surface of the machine tool 1. A servo motor 32 is fixedly installed on the inner wall of the machine tool 1. A synchronous pulley 33 is fixedly connected to the output end of the servo motor 32. A synchronous pulley 35 is connected to the synchronous pulley 33 through a synchronous belt 34. A headstock spindle 36 is rotatably installed on the inner wall of the headstock box 31. A four-jaw chuck 37 is fixedly installed at the end of the headstock spindle 36. A headstock tip 38 is provided at the center of the four-jaw chuck 37. A reduction structure 39 is provided inside the headstock box 31.

[0019] Servo motor 32 serves as the power source, and through the synchronous transmission mechanism consisting of synchronous pulley 33, synchronous belt 34 and synchronous pulley 35, the power is smoothly transmitted to the reduction structure 39. The reduction structure 39 further adjusts the output speed and torque and drives the headstock spindle 36 to rotate smoothly at low speed. The four-jaw chuck 37 set at the front end of the headstock spindle 36 is used to clamp one end of the roll. The headstock tip 38 at its axis and the tailstock tip 49 of the tailstock module 4 together form a double tip positioning to ensure high-precision centering of the roll rotation center, laying the foundation for subsequent high concentricity grinding.

[0020] The reduction structure 39 includes multiple gear sets, which are respectively sleeved on the outer wall of the head frame main shaft 36 and the rotating shaft of the second synchronous pulley 35, and the gear sets mesh with each other for transmission.

[0021] Multiple meshing gear sets constitute a multi-stage reduction mechanism. This mechanism converts the high speed and low torque input from the synchronous pulley 2 35 into the low speed and high torque output required by the headstock spindle 36, meeting the precision rotary drive requirements of heavy-duty rolls with constant torque and stepless speed change in the range of 30rpm to 120rpm, ensuring constant linear speed during grinding and improving the surface quality of the ground surface.

[0022] Please see Figures 3-4 The tailstock module 4 includes a tailstock box 41 movably mounted on the upper surface of the machine tool 1. A mounting rod 42 is fixedly mounted on the bottom side wall of the tailstock box 41. A servo motor 43 is movably mounted on the outer wall of the mounting rod 42 via a slider. A pinion 44 is fixedly connected to the output end of the servo motor 43. A rack 45 is fixedly mounted on the side wall of the machine tool 1. The pinion 44 and the rack 45 mesh to achieve transmission. A hydraulic mechanism 46 is fixedly mounted on the top side wall of the tailstock box 41. A locking screw 47 is provided inside the side of the tailstock box 41. A locking wrench 48 is provided on the top of the tailstock box 41. A sleeve is fixedly connected to the output end of the hydraulic mechanism 46. The side wall of the sleeve is movably connected to the locking wrench 48. A tailstock tip 49 is provided at the end of the sleeve away from the hydraulic mechanism 46.

[0023] Servo motor 43 drives pinion 44 to rotate. Pinion 44 meshes with rack 45 fixed to the side wall of machine tool 1, thereby driving the entire tailstock box 41 to move rapidly along the longitudinal direction of machine tool 1 to approach or move away from the workpiece. It is worth noting that the upper surface of machine tool 1 is also provided with guide rails to limit the horizontal movement of tailstock box 41. After positioning, hydraulic mechanism 46 pushes the internal sleeve and tailstock tip 49 forward to press the other end of the roll. Then, by manually operating locking wrench 48 to lock the sleeve and tightening locking screw 47, the tailstock box 41 is fixed to the bed as a whole, forming a stable double positioning and clamping mechanism, which effectively resists grinding force and ensures the rigidity of the machining system.

[0024] Please see Figures 5-6 The drive module 5 includes a servo motor 3 51 fixedly mounted on the upper surface of the machine tool 1. The output end of the servo motor 3 51 is fixedly connected to a ball screw 1 52 via a coupling. The outer wall of the ball screw 1 52 is connected to a ball slider 1 53 via a transmission connection. The top of the ball slider 1 53 is fixedly connected to the bottom surface of the slide plate 6. The upper surface of the machine tool 1 is fixedly mounted with a flat guide rail 54 and a V-shaped guide rail 55 in a parallel configuration. The upper surface of the slide plate 6 is fixedly mounted with a servo motor 4 56. The output end of the servo motor 4 56 is fixedly connected to a ball screw 2 57 via a coupling. The outer wall of the ball screw 2 57 is connected to a ball slider 2 58 via a transmission connection. The top outer wall of the ball slider 2 58 is fixedly connected to a support plate 59. The support plate 59 is slidably connected to the upper surface of the slide plate 6.

[0025] Servo motor 3 51 drives ball screw 1 52 to rotate, which is converted into precise linear motion of ball slider 1 53 along the axis of ball screw 1 52. This, in turn, drives the entire slide plate 6 to move linearly along the flat guide rail 54 and V-shaped guide rail 55 on the machine tool 1, realizing the feed of grinding disc 8 along the axial direction of the roll. At the same time, servo motor 4 56 mounted on slide plate 6 drives ball screw 2 57 to rotate, which drives ball slider 2 58 and the support plate 59 fixed thereon to move in a direction perpendicular to ball screw 1 52, thereby realizing the radial feed of grinding disc 8 relative to the roll. The dual-axis linkage drive module 5 realizes the precise and rapid positioning of grinding disc 8 at any position in the two-dimensional plane.

[0026] The lower surface of the slide plate 6 is provided with a guide groove that is compatible with the flat guide rail 54 and the V-shaped guide rail 55, and the axis of the first ball screw 52 is perpendicular to the axis of the second ball screw 57.

[0027] The guide groove at the bottom of the slide plate 6, together with the flat guide rail 54 and the V-shaped guide rail 55, forms a high-rigidity, high-precision composite guide pair, ensuring that the slide plate 6 moves smoothly and without wobbling in the longitudinal direction. The perpendicular arrangement of the axis of ball screw 1 52 and the axis of ball screw 2 57 clarifies the independence of the longitudinal and transverse feed motions, making the composite motion trajectory of the grinding disc 8 precise and controllable, and providing a foundation for complex contour grinding.

[0028] Please see Figures 7-8 The support module 9 includes an upper mounting ear 91 fixedly installed on the inner wall of the top of the arc groove 21. A short contact roller 92 is rotatably installed at the end of the upper mounting ear 91. A lower mounting ear 93 is fixedly installed on the inner wall of the arc groove 21. A long contact roller 94 is rotatably connected to the end of the lower mounting ear 93. The outer arc surfaces of the short contact roller 92 and the long contact roller 94 are both provided with spiral grooves 95.

[0029] The short contact roll 92 and the long contact roll 94 contact the outer edge of the roll neck from the top and bottom, respectively. When the roll rotates, the short contact roll 92 and the long contact roll 94 are passively rotated, transforming the traditional sliding friction support into a rolling friction support, which greatly reduces the support resistance and frictional heat. The spiral groove 95 opened on its outer arc surface helps to accommodate grinding fluid or fine debris, and generates a slight axial combing effect during rotation, preventing impurities from accumulating and affecting the support accuracy. Thus, it provides a smooth, low-resistance and clean auxiliary support for the roll during the grinding process.

[0030] The long contact roller 94 includes two coaxially connected roller sleeves. The two roller sleeves are distributed in an isosceles triangle shape with the short contact roller 92, and the spiral grooves 95 opened on the outer arc surface of the two roller sleeves are in opposite spiral directions. At the same time, the number of lower mounting ears 93 is provided, and the three lower mounting ears 93 are respectively located at the center and both ends of the long contact roller 94.

[0031] The two roller sleeves and the short contact roller 92 above form a stable isosceles triangle three-point support layout, which evenly distributes the weight of the roll and effectively prevents the roll neck from deflecting at the support. The spiral grooves 95 on the two roller sleeves with opposite spiral directions guide the fluid or particles in the contact area to converge towards the center or disperse outward when the roll rotates, enhancing the self-cleaning effect. The three lower mounting ears 93 provide stable support for the center and both ends of the long contact roller 94, ensuring that the long contact roller 94 remains straight under load and avoiding downward deflection due to its own weight, which would affect the uniformity of the support.

[0032] Working principle: The large roll to be processed is hoisted onto the arc groove 21 of the two sets of brackets 2. The roll necks at both ends are initially supported by the support module 9. The head frame module 3 is operated. The servo motor 32 drives the reduction structure 39 through the synchronous transmission mechanism composed of the synchronous pulley 33, the synchronous belt 34 and the synchronous pulley 35. This drives the head frame spindle 36 and the four-jaw chuck 37 at its front end to rotate slowly, thus initially positioning the roll neck at the top of the roll. Then, the tail frame module 4 is started. The servo motor 43 drives the pinion 44 to rotate along the fixed gear 45, which drives the tail frame box 41 to move forward quickly along the longitudinal direction of the machine tool 1. This allows the tail frame tip 49 to initially approach one end of the roll. The head frame tip 38 and the tail frame tip 49 cooperate to accurately center and clamp the roll. After clamping, the hydraulic mechanism 46 pushes the tailstock tip 49 to further tighten the workpiece, and achieves double locking through the locking wrench 48 and locking screw 47. During processing, the headstock spindle 36, driven by the servo motor 1 32, obtains a stable low speed and high torque output through the reduction structure 39, driving the roll to rotate at a uniform speed. The servo motor 3 51 of the drive module 5 drives the ball screw 1 52 to rotate, and through the ball slider 1 53, drives the slide plate 6 and the grinding head motor 7 above it to make longitudinal precise feed along the flat guide rail 54 and V-shaped guide rail 55. At the same time, the servo motor 4 56 drives the ball screw 2 57 to rotate, and through the ball slider 2 58 and the support plate 59, drives the grinding head motor 7 to make transverse feed, thereby positioning the two grinding discs 8 respectively and acting on the two roll neck positions of the roll. The grinding head motor 7 drives the grinding disc 8 to rotate at high speed to perform grinding operations. Throughout the grinding process, the short contact roller 92 and long contact roller 94 of the support module 9 maintain rolling contact with the outer edge of the roll neck. The spiral grooves 95 on their surfaces help to guide the grinding fluid and debris, providing stable auxiliary support for the roll and effectively suppressing vibration. Through the one-time precise positioning and clamping of the headstock module 3 and tailstock module 4, and the synchronous or sequential processing of the double grinding discs 8, high-precision and high-concentricity grinding of the roll necks at both ends of the heavy roll is achieved in one clamping. This completely avoids the drawback of traditional single-head grinding machines that need to be turned around due to interference, thus improving processing efficiency and quality.

[0033] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A novel double-head roller neck grinding machine, comprising a machine tool (1), wherein two sets of brackets (2) are fixedly mounted on the upper surface of the machine tool (1), and an arc-shaped groove (21) is formed on the upper surface of the brackets (2), characterized in that: The machine tool (1) is provided with a headstock module (3) and a tailstock module (4) for precise synchronous positioning of the two ends of the roll necks, respectively. Two sets of slide plates (6) are slidably installed on the upper surface of the machine tool (1). A grinding head motor (7) is provided on the upper surface of the slide plate (6). The output end of the grinding head motor (7) is fixedly connected to the grinding disc (8) through a coupling. A drive module (5) for controlling the working position of the grinding disc (8) on the upper surface of the machine tool (1) is provided. A support module (9) for auxiliary stabilizing support of the roll neck is provided on the inner surface of the arc groove (21).

2. The novel double-head roll neck grinding machine according to claim 1, characterized in that: The headstock module (3) includes a headstock box (31) fixedly installed on the upper surface of the machine tool (1). A servo motor (32) is fixedly installed on the inner wall of the machine tool (1). A synchronous pulley (33) is fixedly connected to the output end of the servo motor (32). A synchronous pulley (35) is connected to the synchronous pulley (33) via a synchronous belt (34). A headstock spindle (36) is rotatably installed on the inner wall of the headstock box (31). A four-jaw chuck (37) is fixedly installed at the end of the headstock spindle (36). A headstock tip (38) is provided at the center of the four-jaw chuck (37). A speed reduction structure (39) is provided inside the headstock box (31).

3. A novel double-head roll neck grinding machine according to claim 2, characterized in that: The deceleration structure (39) includes multiple gear sets, which are respectively sleeved on the outer wall of the head frame main shaft (36) and the rotating shaft of the synchronous wheel (35), and the gear sets mesh with each other for transmission.

4. The novel double-head roll neck grinding machine according to claim 1, characterized in that: The tailstock module (4) includes a tailstock box (41) movably mounted on the upper surface of the machine tool (1). A mounting rod (42) is fixedly mounted on the bottom side wall of the tailstock box (41). A servo motor (43) is movably mounted on the outer wall of the mounting rod (42) via a slider. A pinion (44) is fixedly connected to the output end of the servo motor (43). A rack (45) is fixedly mounted on the side wall of the machine tool (1). The pinion (44) meshes with the rack (45) to achieve transmission. A hydraulic mechanism (46) is fixedly mounted on the top side wall of the tailstock box (41). A locking screw (47) is provided inside the side of the tailstock box (41). A locking wrench (48) is provided on the top of the tailstock box (41). A sleeve is fixedly connected to the output end of the hydraulic mechanism (46). The side wall of the sleeve is movably connected to the locking wrench (48). A tailstock tip (49) is provided at the end of the sleeve away from the hydraulic mechanism (46).

5. A novel double-head roll neck grinding machine according to claim 4, characterized in that: The drive module (5) includes a servo motor three (51) fixedly installed on the upper surface of the machine tool (1). The output end of the servo motor three (51) is fixedly connected to a ball screw one (52) via a coupling. The outer wall of the ball screw one (52) is connected to a ball slider one (53). The top of the ball slider one (53) is fixedly connected to the bottom surface of the slide plate (6). The upper surface of the machine tool (1) is fixedly installed with a flat guide rail (54) and a V-shaped guide rail (55) in parallel. The upper surface of the slide plate (6) is fixedly installed with a servo motor four (56). The output end of the servo motor four (56) is fixedly connected to a ball screw two (57) via a coupling. The outer wall of the ball screw two (57) is connected to a ball slider two (58). The top outer wall of the ball slider two (58) is fixedly connected to a support plate (59). The support plate (59) is slidably connected to the upper surface of the slide plate (6).

6. A novel double-head roll neck grinding machine according to claim 5, characterized in that: The lower surface of the slide plate (6) is provided with a guide groove that is compatible with the flat guide rail (54) and the V-shaped guide rail (55), and the axis of the first ball screw (52) is perpendicular to the axis of the second ball screw (57).

7. A novel double-head roll neck grinding machine according to claim 1, characterized in that: The support module (9) includes an upper mounting ear (91) fixedly installed on the inner wall of the top of the arc groove (21). A short contact roller (92) is rotatably installed at the end of the upper mounting ear (91). A lower mounting ear (93) is fixedly installed on the inner wall of the arc groove (21). A long contact roller (94) is rotatably connected to the end of the lower mounting ear (93). The outer arc surfaces of the short contact roller (92) and the long contact roller (94) are both provided with spiral grooves (95).

8. A novel double-head roll neck grinding machine according to claim 7, characterized in that: The long contact roller (94) includes two coaxially connected roller sleeves. The two roller sleeves are distributed in an isosceles triangle shape with the short contact roller (92). The spiral grooves (95) opened on the outer arc surface of the two roller sleeves are in opposite spiral directions. At the same time, the number of lower mounting ears (93) is set to three. The three lower mounting ears (93) are respectively set at the center and both ends of the long contact roller (94).

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