Roller driving mechanism of numerical control roller grinder

Abstract

The utility model belongs to the roll driving auxiliary structure technical field of roll grinder, especially relates to a numerical control roll grinder roll driving mechanism, include: positioning seat, connecting seat, gland and locking piece, be provided with positioning groove on the positioning seat, the positioning groove is the arc type structure that is suitable for the axle head outer profile of roll, the connecting seat sets up on the positioning seat, the connecting seat is coaxial distribution with the positioning seat, the positioning seat can be connected with the drive end on roll grinder head frame, the side of the gland close to the positioning seat is the arc type structure that is suitable for the axle head outer profile of roll, the gland can be along the radial of roll the axle head of roll is pressed in the positioning groove in the positioning seat, the locking piece can lock and unlock the gland with the positioning seat, compared with the prior art, the utility model solves the contact stress concentration, the back gap and inertia impact vibration and the higher problem such as cost of existing in prior art.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary structure for roll drive of roll grinding machine, and particularly relates to a roll drive mechanism for CNC roll grinding machine. Background Technology

[0002] A roll grinding machine is a high-precision CNC machine tool specifically designed for grinding and repairing rolls on rolling mills. Its main function is to restore the geometry, surface finish, and dimensional accuracy of the rolls to ensure the quality of steel and production efficiency during the rolling process.

[0003] In roll grinding machines, the shift fork drive structure (also known as a pawl drive or dial drive) is a mechanical device used to drive the rotation of the rolls. It transmits torque to make the rolls being ground rotate smoothly and precisely during the processing. However, in practical use, the following technical problems have been found in the application of the shift fork drive structure in precision grinding: 1. Contact stress concentration: The common fixing methods for the shift fork type transmission structure are the connection between the shift fork head and the end face of the shaft or the keyway of the roll. The contact between the shift fork head and the roll is a point-to-line contact with a small contact area. When the roll starts and stops, the impact pressure on the fastening part is high. The long-term action of the impact force will cause shell-like fatigue cracks to form on the edge of the keyway, increasing the fit clearance.

[0004] 2. Backlash and Inertial Impact Vibration: Due to the non-fixed contact of the shift fork transmission structure, the rollers cannot change speed immediately due to inertia when the grinding headstock changes speed, resulting in a gap between the shift forks. This gap generates high-frequency vibration at the moment of engagement, which is directly transmitted to the rollers. This causes additional relative motion between the grinding wheel and the roller surface during grinding, resulting in irregular vibration marks or higher surface roughness values ​​on the roller surface. Continuous vibration causes slight radial runout or axial movement of the rollers during rotation, leading to out-of-tolerance roundness and cylindricity. To reduce the impact of this, operators can only reduce grinding parameters, significantly decreasing work efficiency. Simultaneously, the continuous irregular collisions between the grinding wheel and the roller surface caused by vibration will damage the surface flatness of the grinding wheel, increasing the frequency of grinding wheel dressing and wear. In severe cases, this may cause grinding wheel breakage and safety accidents.

[0005] 3. Cost: ①. Direct costs: Wear of shift forks and keyways on rolls results in maintenance costs.

[0006] ②. Indirect costs: Wear on the shift fork leads to unstable transmission, incomplete positioning, and inaccurate positioning, which directly affects grinding accuracy.

[0007] ③. Safety and environmental risk costs: Severe wear may cause sudden breakage or detachment during operation, resulting in accidents that could cause injury or personal injury.

[0008] ④. Management costs: Spare parts need to be manufactured, which occupies working capital and storage space.

[0009] Therefore, there is an urgent need for a new type of roll drive mechanism that can overcome the above-mentioned defects. Utility Model Content

[0010] The purpose of this invention is to address the aforementioned technical problems by providing a CNC roll grinding machine roll drive mechanism, which solves the problems of contact stress concentration, back clearance and inertial impact vibration, and high cost in the prior art.

[0011] In view of this, the present invention provides a roll drive mechanism for a CNC roll grinding machine, comprising: The positioning seat is provided with a positioning groove, which is an arc-shaped structure that matches the outer contour of the roll shaft head; A connecting seat is mounted on a positioning seat and is coaxially distributed with the positioning seat. The positioning seat can be connected to the drive end on the headstock of the roll grinding machine. The pressure cap has an arc-shaped structure on the side near the positioning seat that matches the outer contour of the roll shaft head. The pressure cap can press the roll shaft head into the positioning groove along the radial direction of the roll. The locking element locks and unlocks the gland and the positioning seat.

[0012] In this technical solution, the fully enclosed clamping design formed by the positioning seat and the pressure cap, along with the rigid connection between the positioning seat and the pressure cap by the locking component, eliminates the inherent backlash and meshing impact of the shift fork drive, greatly suppresses vibration transmission, significantly improves the smoothness of the roll rotation and the positioning accuracy, thereby ensuring the quality of the ground surface. The significantly increased contact area significantly reduces contact stress, effectively avoids local fatigue wear caused by point / line contact, extends the service life of the roll drive mechanism itself and the roll shaft head, and reduces maintenance costs and downtime.

[0013] In the above technical solution, the connecting seat is a flange, and the drive end of the roll grinding machine headstock is provided with a drive disc. The connecting seat and the drive disc are connected by a universal joint.

[0014] In the above technical solution, both ends of the pressure cap are provided with connecting through holes, and both ends of the positioning seat are provided with connecting screw holes. The connecting screw holes and connecting through holes are positioned opposite each other, and the connecting through holes, connecting screw holes and threaded fasteners cooperate to lock the pressure cap and the positioning seat.

[0015] Furthermore, the above technical solution also includes a variable diameter jacket, which comprises two arc-shaped jackets that can be installed in the positioning groove and the pressure cover respectively. By replacing the variable diameter jackets with different inner diameters, it can be adapted to roll heads of different diameters.

[0016] In the above technical solution, furthermore, there are multiple sets of variable diameter sleeves, the inner diameter of the first set of variable diameter sleeves is the same as the outer diameter of the second set of variable diameter sleeves, and the first set of variable diameter sleeves can be fitted into the second set of variable diameter sleeves.

[0017] Furthermore, the above technical solution also includes an auxiliary suspension mechanism, which is set at a fixed position on the roll grinding machine. The auxiliary suspension mechanism includes a hook, and a dovetail groove is provided along the circumferential direction on the end face of the connecting seat away from the positioning seat. The bottom of the hook is in the shape of a dovetail that matches the dovetail groove.

[0018] In the above technical solution, the auxiliary suspension mechanism further includes a horizontal cantilever and a vertical arm. The horizontal cantilever is set at a fixed position on the roll grinding machine, the vertical arm is set at one end of the horizontal cantilever, and the hook is set at the lower end of the vertical arm. The vertical arm can be adjusted in both the vertical and horizontal directions.

[0019] In the above technical solution, furthermore, an adjusting screw hole is provided on the vertical arm, and a vertically oriented adjusting screw is rotatably provided on the horizontal cantilever, with the lower end of the adjusting screw threadedly connected to the adjusting screw hole.

[0020] In the above technical solution, the horizontal cantilever is further slidably set at a fixed position on the roll grinding machine via a sliding seat. The sliding seat is provided with a locking screw hole, and a locking screw is threadedly connected to the locking screw hole. The threaded end of the locking screw can extend into the sliding seat and contact the surface of the horizontal cantilever.

[0021] This utility model also discloses a working method suitable for the aforementioned CNC roll grinding machine roll drive mechanism, and further includes a roll grinding machine tailstock, on which a retractable movable center is provided, and a center hole is provided at the end of the roll. The working method of the CNC roll grinding machine roll drive mechanism includes the following steps: Preparation steps: Connect the connecting seat to the drive plate on the headstock of the roll grinding machine via a universal joint. Use the hook to engage with the dovetail groove on the connecting seat to keep the positioning seat and connecting seat coaxial with the live center. Adjust the live center to shorten so that the live center and the positioning seat can accommodate the roll. This completes the preparation work. Positioning steps: Select a suitable diameter-reducing sleeve, place one arc-shaped section of the diameter-reducing sleeve into the positioning groove, then place the shaft end of one end of the roll radially onto the arc-shaped sleeve in the positioning groove, and then adjust the extension of the live center to push the live center into the center hole at the end of the roll to complete the positioning. Clamping steps: Place the other arc-shaped sleeve in the variable diameter sleeve onto the roll shaft head, then press the cover onto the arc-shaped sleeve, and then lock the cover and the positioning seat with the locking device so that the inner circumferential wall of the variable diameter sleeve is tightly fitted with the outer circumferential wall of the roll shaft head, thus completing the clamping. Grinding steps: Separate the hook from the connecting seat, start the headstock of the roll grinding machine to drive the roll to rotate, so that the roll is ground by the roll grinding machine; Disassembly steps: Hold the connecting seat in its current position by engaging the hook with the dovetail groove on the connecting seat, then unlock the pressure cap and the positioning seat using the locking device. Next, remove the pressure cap and a section of the arc-shaped sleeve. Then, adjust the live center to shorten so that the live center exits from the center hole. Finally, remove the roller.

[0022] The beneficial effects of this utility model are: 1. The arc-shaped structure design of the positioning groove and the pressure cap achieves large-area surface contact with the roll shaft head, significantly reducing contact stress and avoiding stress concentration problems caused by point-line contact; the fixed clamping structure eliminates gaps in the transmission process, avoids impact vibration caused by inertia, and improves grinding accuracy; reduces the number of wear parts and lowers maintenance costs; improves transmission smoothness and reduces grinding wheel wear; improves operational safety; and reduces the types and quantities of spare parts.

[0023] 2. The design of the variable diameter jacket allows the mechanism to adapt to roll heads of different diameters, greatly improving the versatility of the equipment; in addition, the nestable design of the variable diameter jacket further expands the applicability of the mechanism, while reducing the storage space requirement and improving space utilization.

[0024] 3. The auxiliary suspension mechanism provides stable support for the roll drive mechanism during loading and unloading, which greatly reduces the labor intensity of operators, while ensuring the accuracy of positioning and improving work efficiency and safety.

[0025] 4. The systematic working method ensures the standardization and consistency of the operation process, improves work efficiency and operational safety, and guarantees the stability of grinding quality. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the roller in this utility model.

[0028] Figure 2 This is a schematic diagram showing the installation state of the roll drive mechanism at one end of the roll in this utility model.

[0029] Figure 3This is a schematic diagram of the split state of the roll drive mechanism at one end of the roll in this utility model.

[0030] Figure 4 This is a schematic diagram showing that the two ends of the roll are respectively connected to the headstock and tailstock of the roll grinding machine in this utility model.

[0031] Figure 5 This is a schematic diagram of the combined state of the roll drive mechanism in this utility model.

[0032] Figure 6 This is a schematic diagram of the positioning seat and connecting seat in this utility model.

[0033] Figure 7 This is a schematic diagram of the structure of the pressure cap in this utility model.

[0034] Figure 8 This is a schematic diagram showing the disassembled state of multiple sets of adjacent diameter-changing jackets in this utility model.

[0035] Figure 9 This is a schematic diagram showing the connection state of multiple sets of adjacent variable diameter jackets in this utility model.

[0036] Figure 10 This is a schematic diagram of the hook and dovetail groove fitting together in this utility model.

[0037] Figure 11 This is a schematic diagram of the auxiliary suspension mechanism in this utility model.

[0038] Figure 12 This is a schematic diagram of the horizontal adjustment structure of the horizontal cantilever in this utility model.

[0039] The markings in the diagram are as follows: G, Roll; G1, Center Hole; M, Roll Grinding Machine; MT, Headstock; MQ, Drive Disc; MW, Tailstock; D, Live Center; 1, Positioning Seat; 101, Positioning Slot; 2, Connecting Seat; 201, Mounting Through Hole; 202, Dovetail Groove; 3, Pressure Cap; 4, Locking Component; 401, Connecting Through Hole; 402, Connecting Screw Hole; 5, Universal Joint; 6, Variable Diameter Jacket; 7, Auxiliary Suspension Mechanism; 701, Hook; 702, Horizontal Cantilever; 703, Vertical Arm; 704, Mounting Hole; 705, Adjusting Screw; 706, Sliding Seat; 707, Locking Screw Hole; 708, Locking Screw; Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] In the description of this utility model, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this utility model. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0042] The structure of the roll G in this utility model is as follows: Figure 1 As shown, it includes a roller body located in the middle, roller necks located at both ends of the roller body, and a shaft head located at the end of the roller neck away from the roller body. A center hole G1 is provided at the end of each shaft head away from the roller neck. This utility model provides a roll drive mechanism for a CNC roll grinding machine. Please refer to [link / reference]. Figure 2 and Figure 3 When installing roll G, the roll drive mechanism is installed at the shaft end of roll G. Please refer to [link / reference]. Figure 4 The roll drive mechanism is connected to the drive end on the headstock MT of the roll grinding machine via a universal joint 5, thereby driving the rotation of the roll G. The other end of the roll G is supported by the live center D on the tailstock MW of the roll grinding machine, so that the roll G can rotate stably. It should be noted that in the prior art, when the fork-type transmission structure is used to drive the rotation of the roll G, the fork transmission is only used at one end of the roll G (i.e., the headstock MT end), while the other end (the tailstock MW end) is positioned and supported by a retractable live center D. In this utility model, the fork-type transmission structure at the headstock MT end is replaced with the roll drive mechanism of this utility model, while the tailstock MW end is still positioned and supported by the retractable live center D. The specific structures of the headstock MT, the headstock MT output end, the tailstock MW, and the retractable live center D of the roll grinding machine M are well known to those skilled in the art and will not be described in detail here. The following embodiments only describe the structure of the roll drive mechanism.

[0043] Example 1 In this embodiment, the roll drive mechanism includes: a positioning seat 1, a connecting seat 2, a pressure cover 3, and a locking component 4; Please see Figure 6 The positioning seat 1 has a semi-circular arc-shaped structure and a positioning groove 101. The positioning groove 101 is an arc-shaped structure that matches the outer contour of the shaft head of the roll G. The positioning seat 1 serves as the basic support component of the entire mechanism. Both ends of the positioning seat 1 are provided with ear plates, and both ear plates are provided with connecting screw holes 402. Figure 6 As shown, each ear plate is provided with two connecting screw holes 402. For example, the specification of the connecting screw holes 402 can be an M20 threaded through hole. Please see Figure 6 The connecting seat 2 is a disc-shaped structure. Eight mounting through holes 201 are distributed circumferentially on the end face of the connecting seat 2. The connecting seat 2 is set on the positioning seat 1 and is coaxially distributed with the positioning seat 1. The positioning seat 1 can be connected to the drive end on the headstock MT of the roll grinding machine. Preferably, the connecting seat 2 is a flange structure and is connected to the positioning seat 1 by welding. The drive end on the headstock MT of the roll grinding machine is provided with a drive disk MQ, which is also a flange structure. The drive disk MQ is connected to the connecting seat 2 through a universal joint 5. Both ends of the universal joint 5 also have flange structures. The two opposite flange structures are connected by bolts and nuts, thereby transmitting power to the headstock MT drive end, universal joint 5, and connecting seat 2. Please see Figure 7 The side of the pressure cap 3 closest to the positioning seat 1 has an arc-shaped structure that matches the outer contour of the roller G's shaft head. The pressure cap 3 can press the roller G's shaft head into the positioning groove 101 along the radial direction of the roller G. Both ends of the pressure cap 3 are provided with ear plates, and both ear plates are provided with connecting through holes 401, such as... Figure 7 As shown, each ear plate is provided with two connection through holes 401. Please refer to [link / reference]. Figure 5Each connecting through hole 401 is positioned opposite a connecting screw hole 402. The diameter of the connecting through hole 401 is larger than the diameter of the connecting screw hole 402. For example, the connecting through hole 401 can be a through hole with a diameter of 22mm. The locking component 4 can lock and unlock the cover 3 and the positioning seat 1. In this embodiment, the locking component 4 can be an M20 hex bolt. When connecting, after placing the shaft head of one end of the roller G in the positioning groove 101, the cover 3 is placed on the positioning seat 1. Then, the threaded end of the bolt is passed through the connecting through hole 401 and screwed into the connecting screw hole 402. The bolt is tightened in the connecting screw hole 402 to fix the cover 3 and the positioning seat 1. In this embodiment, the positioning seat 1 and the pressure cap 3 can be processed simultaneously. For example, taking the positioning seat 1 and the pressure cap 3 together forming a standard inner hole with a diameter of 240mm as an example, a cylindrical blank with a diameter of 380mm is taken. For example, the blank diameter is 380mm, the length is 110mm, and the material is 45# steel. The processing procedure is as follows: The first step is to precision machine the outer diameter: a ring-shaped reinforcing rib with a width of 10mm and an outer diameter of 370mm is machined in the axial center of the cylindrical blank. The outer diameters on both sides of the reinforcing rib are machined to a diameter of 300mm to reduce weight. The second step is precision boring of the inner hole: a through hole with a diameter of 240mm is machined along the axial direction in the middle of the workpiece obtained in the first step; The third step is splitting: the workpiece obtained in the second step is symmetrically split along the axial direction into an identical upper half structure and a lower half structure. Step 4, machining of ear plates and holes: Weld ear plates symmetrically on both sides of the upper and lower structures obtained in step 3, and machine through holes with a diameter of 22mm on the ear plates of the upper structure to obtain pressure cap 3; then machine M20 threaded through holes on the ear plates of the lower structure, and then coaxially weld the flange to the lower part to obtain positioning seat 1. In this embodiment, the positioning seat 1 and the pressure cover 3 work together to clamp the roller G with a shaft head diameter of 240mm.

[0044] Example 2 Based on Example 1, this embodiment further optimizes the structure of the roll drive mechanism; In this embodiment, the roll drive mechanism also includes a variable diameter sleeve 6, which includes two arc-shaped sleeves. The two arc-shaped sleeves can be installed in the positioning groove 101 and the pressure cover 3 respectively. By replacing the variable diameter sleeve 6 with different inner diameters, it can be adapted to the roll G shaft head with different diameters. For details, please refer to Figure 3 and Figure 5The two arc-shaped sleeves can be obtained by symmetrically dividing a ring structure. The outer diameter of the ring structure is the same as the diameter of the positioning groove 101, and the inner diameter of the ring structure is the same as the outer diameter of the shaft head. For example, the material of the variable diameter sleeve 6 can be 45# steel. During installation, select a suitable variable diameter sleeve 6 according to the diameter of the shaft head of the roll G, place one section of the arc-shaped sleeve into the positioning groove 101, so that the outer wall of the arc-shaped sleeve fits against the side wall of the positioning groove 101, then place the shaft head of the roll G into the arc-shaped sleeve in the positioning groove 101, then fasten another section of the arc-shaped sleeve onto the upper part of the shaft head, then press the pressure cover 3 onto the outside of the arc-shaped sleeve, and finally fix the pressure cover 3 to the positioning seat 1 by the locking member 4, so that the roll drive mechanism can surround and clamp the shaft head of the roll G over a large area. By using the variable diameter sleeve 6 in this embodiment, it can be adapted to rolls G with different shaft diameters, greatly improving the versatility of the equipment.

[0045] Example 3 Based on Example 2, this embodiment further optimizes the structure of the variable diameter jacket 6; Please see Figure 8 and Figure 9 There are multiple sets of reducing sleeves 6. The inner diameter of the first set of reducing sleeves 6 is the same as the outer diameter of the second set of reducing sleeves 6, and the first set of reducing sleeves 6 can be fitted into the second set of reducing sleeves 6. For example, the outer diameter of the first set of reducing sleeves 6 is 240mm and the inner diameter is 230mm (suitable for a shaft head diameter of 230mm), the outer diameter of the second set of reducing sleeves 6 is 230mm and the inner diameter is 220mm (suitable for a shaft head diameter of 220mm), and the outer diameter of the third set of reducing sleeves 6 is 220mm and the inner diameter is 210mm (suitable for a shaft head diameter of 210mm). This embodiment only lists three sets of variable diameter sleeves 6 as examples. In actual processing, there may be more sizes of variable diameter sleeves 6. During installation, the corresponding variable diameter sleeves 6 are stacked in order from smallest to largest according to the diameter of the shaft head. For example, if the diameter of the shaft head to be installed is 210mm and the diameter of the standard inner hole formed by the positioning seat 1 and the pressure cap 3 is 240mm, then the aforementioned second set of variable diameter sleeves 6 can be placed outside the third set of variable diameter sleeves 6, and the first set of variable diameter sleeves 6 can be placed outside the second set of variable diameter sleeves 6. Then, the first set of variable diameter sleeves 6 can be placed into the standard inner hole formed by the positioning seat 1 and the pressure cap 3 to achieve precise surrounding and clamping of the shaft head.

[0046] Example 4 Based on Example 1, this embodiment further optimizes the structure of the roll drive mechanism; In this embodiment, the roll drive mechanism further includes an auxiliary suspension mechanism 7, which is disposed at a fixed position on the roll grinding machine M. Please refer to [link to relevant documentation]. Figure 10The auxiliary suspension mechanism 7 includes a hook 701. A dovetail groove 202 is provided along the circumferential direction on the end face of the connecting seat 2 away from the positioning seat 1. For example, the width of the large end is 307mm in diameter and the width of the small end is 290mm. The depth and angle are designed according to the standard. The bottom of the hook 701 is a dovetail shape that matches the dovetail groove 202. Please see Figure 4 The auxiliary suspension mechanism 7 also includes a horizontal cantilever 702 and a vertical arm 703. The horizontal cantilever 702 is set at a fixed position on the roll grinding machine M, the vertical arm 703 is set at one end of the horizontal cantilever 702, and the hook 701 is set at the lower end of the vertical arm 703. The vertical arm 703 can be adjusted in both the vertical and horizontal directions. Please see Figure 11 The top of the hook 701 is rotatably mounted at the bottom of the vertical arm 703. The top of the vertical arm 703 is provided with an adjusting screw hole (not shown in the figure). The end of the horizontal cantilever 702 is provided with a mounting hole 704 for connecting the adjusting screw 705. The adjusting screw 705 is vertically oriented and its rotating end is rotatably mounted in the mounting hole 704. The threaded end of the adjusting screw 705 is threadedly connected to the adjusting screw hole. By rotating the adjusting screw 705, the vertical position of the vertical arm 703 on the horizontal cantilever 702 can be adjusted, thereby adjusting the height of the hook 701. Please see Figure 12 The horizontal cantilever 702 is slidably mounted on a fixed position on the roll grinding machine M via a sliding seat 706. In this embodiment, there are multiple sliding seats 706, which are spaced apart along the length of the horizontal cantilever 702. The sliding seats 706 are fixedly mounted on the fixed position on the roll grinding machine M. A locking screw hole 707 is provided on the side wall of the sliding seat 706, and a locking screw 708 is threaded onto the locking screw hole 707. The threaded end of the locking screw 708 can extend into the sliding seat 706. When the horizontal cantilever 702 needs to move horizontally, the locking screw 708 is screwed outward so that the threaded end of the locking screw 708 is away from the surface of the horizontal cantilever 702, at which time the horizontal cantilever 702 can move horizontally; after the horizontal cantilever 702 has moved horizontally, the locking screw 708 is screwed inward so that the threaded end of the locking screw 708 is pressed tightly against the surface of the horizontal cantilever 702, thereby locking the horizontal cantilever 702 and restricting its horizontal movement. In this embodiment, the auxiliary suspension mechanism 7 provides stable support for the roll drive mechanism during loading and unloading, which greatly reduces the labor intensity of the operators, while ensuring the accuracy of positioning and improving work efficiency and safety. Furthermore, the hook 701 can be adjusted in the horizontal and vertical directions to adapt to different specifications of dovetail grooves 202, that is, to adapt to different specifications of roll drive mechanisms.

[0047] Example 5 This embodiment discloses a working method suitable for the aforementioned CNC roll grinding machine M roll drive mechanism, and also includes a roll grinding machine M tailstock MW, on which a retractable live center D is provided, and a center hole G1 is provided at the end of the roll G. The working method of the CNC roll grinding machine M roll drive mechanism includes the following steps: Preparation steps: Connect the connecting seat 2 to the drive disk MQ on the headstock MT of the roll grinding machine via the universal joint 5. Use the hook 701 to engage with the dovetail groove 202 on the connecting seat 2 to keep the positioning seat 1 and the connecting seat 2 coaxial with the live center D. Adjust the live center D to shorten so that the live center D and the positioning seat 1 can accommodate the roll G. This completes the preparation work. Positioning steps: Select a suitable diameter-changing sleeve 6, place a section of the arc-shaped sleeve in the positioning groove 101, then place the shaft end of one end of the roll G radially on the arc-shaped sleeve in the positioning groove 101, and then adjust the extension of the live center D so that the live center D pushes into the center hole G1 at the end of the roll G to complete the positioning. Clamping steps: Place the other arc-shaped sleeve in the variable diameter sleeve 6 onto the shaft head of the roll G, then press the pressure cover 3 onto the arc-shaped sleeve, and then lock the pressure cover 3 and the positioning seat 1 with the locking piece 4, so that the inner peripheral wall of the variable diameter sleeve 6 is tightly fitted with the outer peripheral wall of the roll G shaft head, and the clamping is completed. Grinding steps: Separate hook 701 from connecting seat 2, start the headstock MT of roll grinding machine M to drive roll G to rotate, so that roll G is ground by roll grinding machine M; Disassembly steps: Hold the connecting seat 2 in its current position by engaging the hook 701 with the dovetail groove 202 on the connecting seat 2, then unlock the pressure cover 3 from the positioning seat 1 by using the locking piece 4, then remove the pressure cover 3 and a section of arc-shaped sleeve, then adjust the live center D to shorten so that the live center D exits from the center hole G1, and finally remove the roller G. In this embodiment, the placement and removal of the roll G can be assisted by a small hoisting device. The systematic working method of this embodiment ensures the standardization and consistency of the operation process, improves work efficiency and operational safety, and at the same time guarantees the stability of grinding quality.

[0048] The embodiments of the present utility model have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other. The present utility model is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present utility model without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present utility model.

Claims

1. A roll drive mechanism for a CNC roll grinder, characterized by, include: Positioning seat (1), the positioning seat (1) is provided with a positioning groove (101), the positioning groove (101) is an arc-shaped structure adapted to the outer contour of the shaft head of the roll (G); Connecting seat (2), the connecting seat (2) is disposed on the positioning seat (1), the connecting seat (2) and the positioning seat (1) are coaxially distributed, and the positioning seat (1) can be connected to the drive end on the headstock (MT) of the roll grinding machine (M); The pressure cap (3) has an arc-shaped structure on the side near the positioning seat (1) that is adapted to the outer contour of the shaft head of the roll (G). The pressure cap (3) can press the shaft head of the roll (G) into the positioning groove (101) along the radial direction of the roll (G). Locking member (4) is capable of locking and unlocking the pressure cap (3) and the positioning seat (1).

2. The CNC roll grinding machine roll drive mechanism according to claim 1, characterized in that: The connecting seat (2) is a flange, and the drive end of the headstock (MT) of the roll grinding machine (M) is provided with a drive disk (MQ). The connecting seat (2) and the drive disk (MQ) are connected by a universal joint (5).

3. The CNC roll grinding machine roll drive mechanism according to claim 1, characterized in that: Both ends of the pressure cap (3) are provided with connecting through holes (401), and both ends of the positioning seat (1) are provided with connecting screw holes (402). The connecting screw holes (402) are opposite to the connecting through holes (401). The connecting through holes (401), connecting screw holes (402) and threaded fasteners cooperate to lock the pressure cap (3) and the positioning seat (1).

4. The CNC roll grinding machine roll drive mechanism according to claim 2 or 3, characterized in that: It also includes a variable diameter sleeve (6), which includes two arc-shaped sleeves. The two arc-shaped sleeves can be installed in the positioning groove (101) and the pressure cover (3) respectively. By replacing the variable diameter sleeve (6) with different inner diameters, it can be adapted to the roller (G) shaft head with different diameters.

5. The CNC roll grinding machine roll drive mechanism according to claim 4, characterized in that: The variable diameter sleeve (6) has multiple sets. The inner diameter of the first set of variable diameter sleeves (6) is the same as the outer diameter of the second set of variable diameter sleeves (6). The first set of variable diameter sleeves (6) can be fitted into the second set of variable diameter sleeves (6).

6. The CNC roll grinding machine roll drive mechanism according to claim 4, characterized in that: It also includes an auxiliary suspension mechanism (7), which is set at a fixed position on the roll grinding machine (M). The auxiliary suspension mechanism (7) includes a hook (701). A dovetail groove (202) is provided along the circumferential direction on the end face of the connecting seat (2) away from the positioning seat (1). The bottom of the hook (701) is in the shape of a dovetail that matches the dovetail groove (202).

7. The CNC roll grinding machine roll drive mechanism according to claim 6, characterized in that: The auxiliary suspension mechanism (7) further includes a horizontal cantilever (702) and a vertical arm (703). The horizontal cantilever (702) is set at a fixed position on the roll grinding machine (M). The vertical arm (703) is set at one end of the horizontal cantilever (702). The hook (701) is set at the lower end of the vertical arm (703). The vertical arm (703) can be adjusted in both the vertical and horizontal directions.

8. The CNC roll grinding machine roll drive mechanism according to claim 7, characterized in that: The vertical arm (703) is provided with an adjusting screw hole, and the horizontal cantilever (702) is rotatably provided with a vertically oriented adjusting screw (705), the lower end of the adjusting screw (705) being threadedly connected to the adjusting screw hole.

9. The CNC roll grinding machine roll drive mechanism according to claim 7, characterized in that: The horizontal cantilever (702) is slidably mounted on a fixed position on the roll grinding machine (M) via a sliding seat (706). The sliding seat (706) is provided with a locking screw hole (707), and a locking screw (708) is threadedly connected to the locking screw hole (707). The threaded end of the locking screw (708) can extend into the sliding seat (706) and contact the surface of the horizontal cantilever (702).

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