A grinding machine and method for machining a brake assembly

Abstract

The application relates to the technical field of grinding machine tools and discloses a grinding machine tool and a machining method for a brake assembly. Through the arrangement of a clamping mechanism and a driving assembly, when a brake drum to be machined is sleeved on a fixed sleeve, the driving assembly drives a driving block to push a supporting plate to extend out of the fixed sleeve and abut against the inner side of the brake drum, a connecting seat drives a clamping plate to move towards the driving block, the horizontally placed clamping plate is vertically erected and abuts against the side surface of the brake drum, the rapid feeding of the workpiece is realized, when the workpiece is discharged, the driving assembly drives the driving block to retract the supporting plate, the connecting seat drives the clamping plate to reset and releases the fixation of the brake drum, the rapid discharging of the workpiece is realized, the machining efficiency of the workpiece is improved, the brake drum is supported by the supporting plate, the brake drum can be kept stable during grinding, and the grinding precision of the brake drum is improved.

Description

Technical Field

[0001] This invention relates to the field of grinding machine tool technology, specifically to a grinding machine tool and a machining method for a brake assembly. Background Technology

[0002] The automotive brake assembly is the core component of the automotive braking system, composed of multiple parts. It is responsible for converting the driver's braking command into the deceleration or stopping action of the wheels. Drum brakes are one of these components. In the production of brake drums, an important component of drum brakes, grinding is performed on grinding machines to eliminate surface defects such as burrs and scratches from casting or machining in order to maintain extremely high surface precision and roughness on the cylindrical surface. At the same time, it meets the requirements of dimensional accuracy and geometric tolerances. However, existing grinding machines require manual control of the fixtures on the machine tool to clamp and release the workpiece during loading and unloading. This process takes up a lot of time and reduces the processing efficiency of the workpiece. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the present invention provides a grinding machine tool and a processing method for brake assembly, so as to overcome the above-mentioned technical problems existing in the prior art.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a grinding machine tool, comprising a machine tool body and a processing chamber formed on the machine tool body, wherein a clamping mechanism, a driving assembly and a processing mechanism are provided in the processing chamber, the clamping mechanism comprising a fixed sleeve, a driving block, a connecting seat and a clamping plate, the fixed sleeve being rotatably installed in the processing chamber, and a plurality of sliding grooves being formed on the periphery of the fixed sleeve, wherein a driving block is slidably installed in each sliding groove, a support plate being fixedly connected to the upper end of the driving block, and the driving block being connected to the driving assembly;

[0005] When the brake drum to be processed is fitted onto the fixed sleeve, the drive assembly drives the drive block to slide upward, driving the support plate to extend from the periphery of the fixed sleeve and abut against the inner wall of the brake drum, thereby supporting and fixing the brake drum.

[0006] The connecting seat is slidably mounted on the open end of the fixed sleeve. A clamping plate is rotatably mounted on the connecting seat. Initially, the connecting seat is located at the open end of the fixed sleeve, and the clamping plate is parallel to the connecting seat. When the brake drum is fixed by the support plate, the connecting seat drives the clamping plate away from the open end of the fixed sleeve, so that the clamping plate rotates upward to be perpendicular to the connecting seat and clamps the side of the brake drum.

[0007] The machining mechanism corresponds to the side of the clamping mechanism, and the machining mechanism is used to grind the brake drum fixed by the clamping mechanism.

[0008] Preferably, the clamping mechanism further includes a drive shaft, which is rotatably mounted inside the machine tool body. One end of the drive shaft located inside the machine tool body is fixedly connected to the output shaft of a drive motor. A fixed plate is fixedly connected to the other end of the drive shaft located inside the machining chamber. The fixed sleeve is fixedly mounted on the fixed plate. The drive shaft drives the fixed sleeve to rotate inside the machining chamber through the drive motor.

[0009] Preferably, the fixed sleeve is hollow inside, and a plurality of sliding grooves are evenly distributed around the periphery of the fixed sleeve. Each sliding groove is fixedly connected to a mounting seat. The periphery of the fixed sleeve also has a plurality of receiving grooves, each receiving groove corresponding to one of the sliding grooves. The support plate fits into the receiving grooves. The fixed sleeve also has a plurality of sliding grooves, which are located between two adjacent sliding grooves. Limiting grooves are formed on both sides of each sliding groove. The limiting grooves are Z-shaped, and racks are fixedly connected to both sides of each limiting groove. The racks are located below the limiting grooves, and the connecting seat is slidably installed in the sliding grooves.

[0010] Preferably, a plurality of servo motors are fixedly installed on the side of the fixed disk away from the fixed sleeve. Each servo motor has a lead screw coaxially fixedly connected to its output shaft. One end of the lead screw passes through the fixed disk and is rotatably installed in the slide groove. The bottom of the connecting seat is threaded onto the lead screw.

[0011] Preferably, a connecting plate is fixedly connected to the bottom of the clamping plate, the connecting plate is rotatably mounted on the connecting seat, a spur gear is fixedly mounted on the outer side of the connecting plate, the spur gear corresponds to the rack, and as the connecting seat drives the clamping plate to move, the spur gear can mesh with the rack. A limit rod is fixedly connected to one side of the spur gear, and the limit rod corresponds to the limit groove.

[0012] Preferably, the drive assembly includes a second servo motor and a transmission rod. The second servo motor is fixedly installed inside the drive shaft. The transmission shaft of the second servo motor is coaxially and fixedly connected to the transmission rod. The transmission rod is rotatably installed inside the drive shaft, and one end of the transmission rod passes through the fixed plate and extends into the fixed sleeve. A mounting plate is fixedly connected to this end of the transmission rod, and a transmission bevel gear is fixedly connected to the mounting plate.

[0013] Preferably, the drive assembly further includes a driven rod, which is a threaded rod rotatably mounted on the mounting base. The drive block is threadedly assembled onto the threaded rod, and a driven bevel gear is coaxially fixedly connected to the lower end of the driven rod, the driven bevel gear meshing with the transmission bevel gear.

[0014] Preferably, a partition is fixedly installed inside the fixed sleeve, the partition separating the drive assembly from the open end of the fixed sleeve, and a clamping head is fixedly connected to the bottom of the drive block.

[0015] Preferably, a slide table is fixedly installed inside the processing chamber, and the processing mechanism is slidably installed on the slide table.

[0016] The present invention also provides a machining method for a brake assembly, which uses a grinding machine tool, and the specific steps are as follows:

[0017] First, the brake drum to be processed is placed on the fixed sleeve. Then, the drive assembly drives the drive block to move to the upper end of the sliding groove, so that the support plate extends from the outside of the fixed sleeve and abuts against the inside of the brake drum, thereby supporting the brake drum on the fixed sleeve. At the same time, the connecting seat drives the flat clamping plate to move to the side of the brake drum. The flat clamping plate rotates 90 degrees during the movement, thereby clamping the side of the brake drum in an upright state. Through the cooperation of the support plate and the clamping plate, the brake drum is fixed on the fixed sleeve. After the brake drum is fixed, the processing mechanism grinds the brake drum.

[0018] Compared with the prior art, the present invention provides a grinding machine tool and a machining method for a brake assembly, which has the following beneficial effects:

[0019] 1. The grinding machine tool and the processing method for brake assemblies, through the setting of the clamping mechanism and drive assembly, when grinding the brake drum, after the worker puts the brake drum to be processed on the fixed sleeve, the drive assembly drives the drive block to push the support plate out from the fixed sleeve and abut against the inner side of the brake drum. At the same time, the connecting seat drives the clamping plate to move towards the drive block, so that the flat clamping plate is vertical and abuts against the side of the brake drum. The support plate supports and fixes the inner side of the brake drum, and the clamping plate clamps and fixes the side of the brake drum, thereby quickly fixing the brake drum on the fixed sleeve and realizing the rapid loading of the workpiece. When unloading, the drive assembly drives the drive block to retract the support plate, and the connecting seat drives the clamping plate to reset, releasing the fixation of the brake drum and realizing the rapid unloading of the workpiece, thereby improving the processing efficiency of the workpiece. Furthermore, the support plate supports the brake drum, so that the brake drum can remain stable during grinding, thereby improving the grinding accuracy of the brake drum.

[0020] 2. The grinding machine tool and the machining method for the brake assembly, through the cooperation of the drive block, support plate and clamping head, when it is necessary to machine a workpiece sleeved on the outside of the fixed sleeve, the drive block will move upward, and the drive support plate will extend from the outside of the fixed sleeve to support the inside of the workpiece sleeved on the fixed sleeve and fix the workpiece on the fixed sleeve. When it is necessary to machine a workpiece placed inside the fixed sleeve, the drive block will move downward, and the drive clamping head will extend from the sliding groove and abut against the outside of the workpiece inside the sleeve to clamp and fix the workpiece inside the fixed sleeve. Thus, the inside and outside of the fixed sleeve of the clamping mechanism can be used to fix the workpiece, thereby improving the applicability of the clamping mechanism. Attached Figure Description

[0021] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention;

[0022] Figure 2 This is a second three-dimensional structural schematic diagram of the present invention;

[0023] Figure 3 This is a schematic diagram of the main body planar structure of the machine tool according to the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of the processing chamber of the present invention;

[0025] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point A;

[0026] Figure 6 This is a schematic diagram of the internal structure of the fixing sleeve of the present invention;

[0027] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point B;

[0028] Figure 8 This is a schematic diagram of the clamping mechanism of the present invention;

[0029] Figure 9 This is a schematic diagram of the internal structure of the drive shaft of the present invention;

[0030] Figure 10 This is a schematic diagram of the internal structure of the chute of the present invention;

[0031] Figure 11 This is a schematic diagram showing the positional relationship between the lead screw and connecting seat, etc., of the present invention;

[0032] Figure 12 for Figure 11 A magnified schematic diagram of the structure at point C.

[0033] In the diagram: 1. Machine tool body; 11. Machining chamber; 12. Slide table; 2. Clamping mechanism; 21. Drive shaft; 211. Fixed plate; 22. Fixed sleeve; 221. Sliding groove; 2211. Mounting base; 222. Storage groove; 223. Sliding groove; 224. Limiting groove; 225. Rack; 23. Drive block; 231. Support plate; 232. Clamping head; 24. Servo motor one; 241. Lead screw; 25. Connecting seat; 26. Clamping plate; 261. Connecting plate; 262. Spur gear; 263. Limiting rod; 27. Partition plate; 3. Drive assembly; 31. Servo motor two; 32. Transmission rod; 33. Mounting plate; 34. Transmission bevel gear; 35. Driven rod; 36. Driven bevel gear; 4. Machining mechanism. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-12 A grinding machine tool includes a machine tool body 1 and a processing chamber 11 formed on the machine tool body 1. The processing chamber 11 is provided with a clamping mechanism 2, a drive assembly 3 and a processing mechanism 4. The clamping mechanism 2 includes a fixed sleeve 22, a drive block 23, a connecting seat 25 and a clamping plate 26. The fixed sleeve 22 is rotatably installed in the processing chamber 11. Several sliding grooves 221 are formed on the periphery of the fixed sleeve 22. A drive block 23 is slidably installed in each sliding groove 221. The upper end of the drive block 23 is fixedly connected to a support plate 231, and the drive block 23 is connected to the drive assembly 3.

[0036] When the brake drum to be processed is fitted onto the fixed sleeve 22, the drive assembly 3 drives the drive block 23 to slide upward, and the drive support plate 231 extends from the periphery of the fixed sleeve 22 and abuts against the inner wall of the brake drum, thereby supporting and fixing the brake drum.

[0037] The connecting seat 25 is slidably mounted on the open end of the fixed sleeve 22. A clamping plate 26 is rotatably mounted on the connecting seat 25. Initially, the connecting seat 25 is located at the open end of the fixed sleeve 22, and the clamping plate 26 is parallel to the connecting seat 25. When the brake drum is fixed by the support plate 231, the connecting seat 25 drives the clamping plate 26 away from the open end of the fixed sleeve 22, so that the clamping plate 26 rotates upward to be perpendicular to the connecting seat 25 and clamps the side of the brake drum.

[0038] The machining mechanism 4 is located on the side of the clamping mechanism 2. The machining mechanism 4 is used to grind the brake drum fixed by the clamping mechanism 2.

[0039] In operation, the brake drum to be processed is fitted onto the fixed sleeve 22. At this time, the support plate 231 retracts onto the fixed sleeve 22, with the outer side of the support plate 231 fitting against the outer side of the fixed sleeve 22. The connecting seat 25 is located at the open end of the fixed sleeve 22, and the clamping plate 26 is placed flat on the connecting seat 25, parallel to the axis of the fixed sleeve 22. After the brake drum is fitted onto the fixed sleeve 22, the drive assembly 3 drives the drive block 23 to slide towards the upper end of the sliding groove 221. The drive block 23 pushes the support plate 231 out of the fixed sleeve 22, and at the same time, the connecting seat 25 drives the clamping plate 26 to slide linearly towards the drive block 23. During this process, the clamping plate 26, which is placed flat on the connecting seat 25, rotates upward by 90 degrees, thus becoming perpendicular to the axis of the fixed sleeve 22. As the drive block 23 and the connecting seat 25 continue to move, the outer side of the support plate 231 will eventually abut against the inner side of the brake drum, thereby supporting the brake drum and fixing it to the outer side of the fixed sleeve 22. At the same time, the upright clamping plate 26 will abut against the side of the brake drum, clamping the brake drum from the side. The brake drum is fixed to the fixed sleeve 22 through the cooperation of the support plate 231 and the clamping plate 26. Then, the processing mechanism 4 in the processing chamber 11 grinds the outer surface of the brake drum.

[0040] After grinding is completed, the machining mechanism 4 stops working, and the drive assembly 3 drives the drive block 23 to slide towards the lower end of the sliding groove 221. The drive block 23 pulls the support plate 231 into the fixed sleeve 22, and the outer side of the support plate 231 separates from the inner side of the brake drum, thereby ending the support of the brake drum and releasing the support plate 231 from fixing the brake drum. At the same time, the connecting seat 25 drives the clamping plate 26 to slide linearly towards the opening end of the fixed sleeve 22, away from the side of the brake drum. When the connecting seat 25 is about to return to the opening end of the fixed sleeve 22, the upright clamping plate 26 rotates downward 90 degrees, thereby becoming parallel to the axis of the fixed sleeve 22 again, ending the clamping of the brake drum side by the clamping plate 26. Then the machined brake drum can be removed from the fixed sleeve 22 and taken out from the machining chamber 11.

[0041] Furthermore, the clamping mechanism 2 also includes a drive shaft 21, which is rotatably mounted inside the machine tool body 1. One end of the drive shaft 21 inside the machine tool body 1 is fixedly connected to the output shaft of the drive motor. A fixed plate 211 is fixedly connected to one end of the drive shaft 21 inside the processing chamber 11. A fixed sleeve 22 is fixedly mounted on the fixed plate 211. The drive shaft 21 drives the fixed sleeve 22 to rotate inside the processing chamber 11 through the drive motor.

[0042] During the grinding of the brake drum, the drive shaft 21, driven by the drive motor, drives the brake drum fixed on the fixed sleeve 22 to rotate, so that the processing mechanism 4 grinds the rotating brake drum. After the grinding is completed, the processing mechanism 4 stops working, and the drive shaft 21 stops rotating, ending the rotation of the brake drum.

[0043] Furthermore, the fixed sleeve 22 is hollow inside, and several sliding grooves 221 are evenly distributed around the periphery of the fixed sleeve 22. Each sliding groove 221 is fixedly connected to a mounting base 2211. Several storage grooves 222 are also formed around the periphery of the fixed sleeve 22, and each storage groove 222 corresponds to a sliding groove 221. The support plate 231 fits into the storage groove 222. Several sliding grooves 223 are also formed on the fixed sleeve 22. The sliding grooves 223 are located between two adjacent sliding grooves 221. Limiting grooves 224 are formed on both sides of the sliding grooves 223. The limiting grooves 224 are Z-shaped. A rack 225 is fixedly connected to both sides of the limiting grooves 224. The rack 225 is located below the limiting grooves 224. The connecting base 25 is slidably installed in the sliding grooves 223.

[0044] Initially, the support plate 231 is located in the storage groove 222. When it is necessary to fix the brake drum, the support plate 231 extends out of the storage groove 222 under the push of the drive block 23. When the support plate 231 is released from fixing the brake, the drive block 23 pulls the support plate 231 back into the storage groove 222.

[0045] Furthermore, several servo motors 24 are fixedly installed on the side of the fixed disk 211 away from the fixed sleeve 22. Each servo motor 24 has a lead screw 241 coaxially fixedly connected to its output shaft. One end of the lead screw 241 passes through the fixed disk 211 and is rotatably installed in the slide groove 223. The bottom of the connecting seat 25 is threaded onto the lead screw 241.

[0046] Furthermore, a connecting plate 261 is fixedly connected to the bottom of the clamping plate 26. The connecting plate 261 is rotatably mounted on the connecting seat 25. A spur gear 262 is fixedly mounted on the outer side of the connecting plate 261. The spur gear 262 corresponds to the rack 225. As the connecting seat 25 drives the clamping plate 26 to move, the spur gear 262 can mesh with the rack 225. A limit rod 263 is fixedly connected to one side of the spur gear 262. The limit rod 263 corresponds to the limit groove 224.

[0047] Initially, the connecting seat 25 is located at one end of the slide groove 223 near the opening of the fixed sleeve 22. The clamping plate, which is placed flat on the connecting seat 25, extends from the opening of the fixed sleeve 22. The spur gear 262 is not engaged with the rack 225, and the limiting rod 263 is located on the lower side of the Z-shaped limiting groove 224. When the brake drum is fixed on the fixed sleeve 22, the servo motor 24 drives the lead screw 241 to rotate in the opposite direction. Under the drive of the lead screw 241, the connecting seat 25 moves the clamping plate 26 towards the fixed plate 211. The limiting rod 263 disengages from the lower side of the Z-shaped limiting groove 224. Subsequently, the spur gear 262 engages with the rack 225, and the brake drum moves from the lower side of the Z-shaped limiting groove 224. The connecting plate 261 drives the clamping plate 26 to rotate upward. At the same time, as the spur gear 262 rotates, the limiting rod 263 moves closer to the upper side of the Z-shaped limiting groove 224. After the spur gear 262 drives the clamping plate 26 to rotate 90 degrees, the limiting rod 263 enters the upper side of the Z-shaped limiting groove 224. At the same time, the spur gear 262 disengages from the rack 225. As the connecting seat 25 continues to move, the clamping plate 26 remains in an upright state under the cooperation of the limiting rod 263 and the limiting groove 224, thereby abutting against the side of the brake drum and pushing the other side of the brake drum to abut against the fixed plate 211, clamping the brake drum from the side.

[0048] After the brake drum has completed grinding, the servo motor 24 drives the lead screw 241 to rotate forward. Driven by the lead screw 241, the connecting seat 25 moves the clamping plate 26 away from the fixed plate 211. Then, the spur gear 262 meshes with the rack 225 again, and the limiting rod 263 disengages from the upper side of the Z-shaped limiting groove 224. As the connecting seat 25 continues to move, the spur gear 262, in conjunction with the rack 225, drives the clamping plate 26 to rotate downwards. As the spur gear 262 rotates, the limiting rod 263 moves towards the lower side of the Z-shaped limiting groove 224. After the spur gear 262 drives the clamping plate 26 to rotate 90 degrees, the limiting rod 263 enters the lower side of the Z-shaped limiting groove 224. At the same time, the spur gear 262 disengages from the rack 225 again. As the connecting seat 25 continues to move, the clamping plate 26 remains flat under the cooperation of the limiting rod 263 and the limiting groove 224, returning to its original position, thus ending the clamping of the brake drum.

[0049] Furthermore, the drive assembly 3 includes a second servo motor 31 and a transmission rod 32. The second servo motor 31 is fixedly installed inside the drive shaft 21. The transmission shaft of the second servo motor 31 is coaxially and fixedly connected to the transmission rod 32. The transmission rod 32 is rotatably installed inside the drive shaft 21, and one end of the transmission rod 32 passes through the fixed disk 211 and extends into the fixed sleeve 22. A mounting disk 33 is fixedly connected to this end of the transmission rod 32, and a transmission bevel gear 34 is fixedly connected to the mounting disk 33.

[0050] Furthermore, the drive assembly 3 also includes a driven rod 35, which is a threaded rod. The driven rod 35 is rotatably mounted on the mounting base 2211. The drive block 23 is threadedly assembled onto the threaded rod. The lower end of the driven rod 35 is coaxially fixedly connected to a driven bevel gear 36, which meshes with the transmission bevel gear 34.

[0051] When the brake drum is fixed to the fixed sleeve 22, the servo motor 31 drives the transmission rod 32 to rotate in the opposite direction, which drives the transmission bevel gear 34 on the mounting plate 33 to rotate synchronously. The rotating transmission bevel gear 34 then drives the driven rod 35 to rotate in the opposite direction through the driven bevel gear 36. The driven rod 35, rotating in the opposite direction, drives the drive block 23 to slide towards the upper end of the sliding groove 221 through the thread. When the brake drum is released from the fixed position, the servo motor 31 drives the transmission rod 32 to rotate in the forward direction, which drives the transmission bevel gear 34 on the mounting plate 33 to rotate synchronously. The rotating transmission bevel gear 34 then drives the driven rod 35 to rotate in the forward direction through the driven bevel gear 36. The driven rod 35, rotating in the forward direction, drives the drive block 23 to slide towards the lower end of the sliding groove 221 through the thread.

[0052] Furthermore, a partition 28 is fixedly installed inside the fixed sleeve 22, which separates the drive assembly 3 from the open end of the fixed sleeve 22, and a clamping head 232 is fixedly connected to the bottom of the drive block 23.

[0053] The clamping mechanism 2, through the arrangement of the partition 28 and the clamping head 232, can not only fix the workpiece through the outside of the fixed sleeve 22, but also fix the workpiece through the inside of the fixed sleeve 22. When fixing the workpiece through the inside of the fixed sleeve 22, firstly, one end of the workpiece to be processed is inserted into the fixed sleeve 22 from the open end of the fixed sleeve 22, so that the end of the workpiece abuts against the partition 28. Then, the servo motor 21 drives the driven rod 35 to rotate in the forward direction, so that the driving block 23 slides towards the lower end of the sliding groove 221, thereby pushing the clamping head 232 to extend from the lower end of the sliding groove 221 and abut against the workpiece, thereby clamping and fixing the workpiece. After the workpiece is processed, the servo motor 21 drives the driven rod 35 to rotate in the reverse direction, so that the driving block 23 slides towards the upper end of the sliding groove 221, thereby retracting the clamping head 232 into the sliding groove 221 and releasing the fixation of the workpiece.

[0054] Furthermore, a slide table 12 is fixedly installed inside the processing chamber 11, and the processing mechanism 4 is slidably installed on the slide table 12.

[0055] During the processing of the workpiece, the processing mechanism 4 moves on the slide table 12 to adjust the processing position and process the workpiece on the clamping mechanism 2.

[0056] The present invention also provides a machining method for a brake assembly, which uses a grinding machine tool, and the specific steps are as follows:

[0057] First, the brake drum to be processed is placed on the fixed sleeve 22. Then, the drive assembly 3 drives the drive block 23 to move to the upper end of the sliding groove 221, so that the support plate 231 extends from the outside of the fixed sleeve 22 and abuts against the inside of the brake drum, thereby supporting the brake drum on the fixed sleeve 22. At the same time, the connecting seat 25 drives the flat clamping plate 26 to move to the side of the brake drum. The flat clamping plate 26 rotates 90 degrees during the movement, thereby clamping the side of the brake drum in an upright state. Through the cooperation of the support plate 231 and the clamping plate 26, the brake drum is fixed on the fixed sleeve 22. After the brake drum is fixed, the processing mechanism 4 grinds the brake drum.

[0058] Working principle: During use, the brake drum to be processed is fitted onto the fixed sleeve 22. At this time, the support plate 231 is located in the receiving groove 222, and the outer side of the support plate 231 is in contact with the outer side of the fixed sleeve 22. The connecting seat 25 is located at one end of the slide groove 223 near the opening end of the fixed sleeve 22. The clamping disc, which is placed flat on the connecting seat 25, extends from the opening end of the fixed sleeve 22. The spur gear 262 is not meshed with the rack 225. The limiting rod 263 is located on the lower side of the Z-shaped limiting groove 224. After the brake drum is fitted onto the fixed sleeve 22, the servo motor of the drive assembly 3... Servo motor 21 drives transmission rod 32 to rotate in the opposite direction, causing transmission bevel gear 34 on mounting plate 33 to rotate synchronously. The rotating transmission bevel gear 34 then drives driven rod 35 to rotate in the opposite direction via driven bevel gear 36. The reverse-rotating driven rod 35, through a thread, drives drive block 23 to slide towards the upper end of sliding groove 221. Drive block 23 pushes support plate 231 out of storage groove 222. At the same time, servo motor 24 drives lead screw 241 to rotate in the opposite direction. Under the drive of lead screw 241, connecting seat 25 drives clamping plate 26 towards fixed plate 2. Moving in direction 11, the limiting rod 263 disengages from the lower side of the Z-shaped limiting groove 224. Subsequently, the spur gear 262 meshes with the rack 225, thereby driving the connecting plate 261 to rotate the clamping plate 26 upward. Simultaneously, as the spur gear 262 rotates, the limiting rod 263 moves towards the upper side of the Z-shaped limiting groove 224. After the spur gear 262 drives the clamping plate 26 to rotate 90 degrees, the limiting rod 263 enters the upper side of the Z-shaped limiting groove 224. At the same time, the spur gear 262 disengages from the rack 225. As the connecting seat 25 continues to move, the clamping plate 26 moves towards the upper side of the limiting rod 263. With the cooperation of 63 and limit groove 224, it remains in an upright state. As the drive block 23 and connecting seat 25 continue to move, the outer side of the support plate 231 will eventually abut against the inner side of the brake drum, thereby supporting the brake drum and fixing it to the outer side of the fixing sleeve 22. At the same time, the upright clamping plate 26 will abut against the side of the brake drum, clamping the brake drum from the side. The brake drum is fixed on the fixing sleeve 22 through the cooperation of the support plate 231 and the clamping plate 26. Then the processing mechanism 4 in the processing chamber 11 grinds the outer surface of the brake drum.

[0059] After grinding is completed, the machining mechanism 4 stops working. The servo motor 31 of the drive assembly 3 drives the transmission rod 32 to rotate forward, which drives the transmission bevel gear 34 on the mounting plate 33 to rotate synchronously. The rotating transmission bevel gear 34 drives the driven rod 35 to rotate forward through the driven bevel gear 36. The forward-rotating driven rod 35 drives the drive block 23 to slide towards the lower end of the sliding groove 221 through the thread. The drive block 23 pulls the support plate 231 into the receiving groove 222, and the outer side of the support plate 231 separates from the inner side of the brake drum, thereby ending the support for the brake drum and releasing the support plate 231 from fixing the brake drum. At the same time, the servo motor 24 drives the lead screw 241 to rotate forward. Under the drive of the lead screw 241, the connecting seat 25 drives the clamping plate 26 to move away from the fixed plate 211. Gear 262 meshes with rack 225 again, and limit rod 263 disengages from the upper side of Z-shaped limit groove 224. As connecting seat 25 continues to move, spur gear 262, in cooperation with rack 225, drives clamping plate 26 to rotate downward. As spur gear 262 rotates, limit rod 263 moves closer to the lower side of Z-shaped limit groove 224. After spur gear 262 drives clamping plate 26 to rotate 90 degrees, limit rod 263 enters the lower side of Z-shaped limit groove 224. At the same time, spur gear 262 disengages from rack 225 again. As connecting seat 25 continues to move, clamping plate 26, in cooperation with limit rod 263 and limit groove 224, remains flat and returns to its original position, thus ending the clamping of brake drum. Then the processed brake drum can be removed from fixed sleeve 22 and taken out from processing chamber 11.

[0060] The clamping mechanism 2, through the arrangement of the partition 28 and the clamping head 232, can not only fix the workpiece through the outside of the fixed sleeve 22, but also fix the workpiece through the inside of the fixed sleeve 22. When fixing the workpiece through the inside of the fixed sleeve 22, firstly, one end of the workpiece to be processed is inserted into the fixed sleeve 22 from the open end of the fixed sleeve 22, so that the end of the workpiece abuts against the partition 28. Then, the servo motor 21 drives the driven rod 35 to rotate in the forward direction, so that the driving block 23 slides towards the lower end of the sliding groove 221, thereby pushing the clamping head 232 to extend from the lower end of the sliding groove 221 and abut against the workpiece, thereby clamping and fixing the workpiece. After the workpiece is processed, the servo motor 21 drives the driven rod 35 to rotate in the reverse direction, so that the driving block 23 slides towards the upper end of the sliding groove 221, thereby retracting the clamping head 232 into the sliding groove 221 and releasing the fixation of the workpiece.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grinding machine bed, comprising a machine bed body and a machining cabin opened on the machine bed body, a clamping mechanism, a driving assembly and a machining mechanism are arranged in the machining cabin, characterized in that: The clamping mechanism comprises a fixed sleeve, a driving block, a connecting seat and a clamping plate, the fixed sleeve is rotatably installed in the machining bin, a plurality of sliding grooves are formed in the periphery of the fixed sleeve, one driving block is slidably installed in each sliding groove, the upper end of the driving block is fixedly connected with a support plate, and the driving block is connected with the driving assembly; When the brake drum to be machined is sleeved on the fixed sleeve, the driving assembly drives the driving block to slide upward, drives the support plate to extend from the periphery of the fixed sleeve, and abuts against the inner wall of the brake drum, so as to support and fix the brake drum; The connecting seat is slidably installed on the open end of the fixed sleeve, the clamping plate is rotatably installed on the connecting seat, initially, the connecting seat is located at the open end of the fixed sleeve, the clamping plate is parallel to the connecting seat, when the support plate fixes the brake drum, the connecting seat drives the clamping plate to move away from the open end of the fixed sleeve, so that the clamping plate is turned upward to be perpendicular to the connecting seat and clamped on the side surface of the brake drum; The machining mechanism corresponds to the side of the clamping mechanism, the machining mechanism is used for grinding the brake drum fixed by the clamping mechanism; the clamping mechanism further comprises a driving shaft, the driving shaft is rotatably installed in the machine tool body, one end of the driving shaft in the machine tool body is fixedly connected with the output shaft of the driving motor, the other end of the driving shaft in the machining bin is fixedly connected with a fixed disc, the fixed sleeve is fixedly installed on the fixed disc, the driving shaft drives the fixed sleeve to rotate in the machining bin through the driving of the driving motor; The inside of the fixed sleeve is hollow, a plurality of sliding grooves are uniformly distributed on the periphery of the fixed sleeve, an installation seat is fixedly connected in each sliding groove, a plurality of receiving grooves are formed in the periphery of the fixed sleeve, each receiving groove corresponds to one sliding groove, the support plate is matched with the receiving groove, a plurality of sliding grooves are formed in the fixed sleeve, the sliding grooves are located between two adjacent sliding grooves, limit grooves are formed in the two sides of the sliding groove, the limit grooves are Z-shaped, a rack is fixedly connected on the two sides in the limit groove, the rack is located below the limit groove, and the connecting seat is slidably installed in the sliding groove.

2. A grinding machine according to claim 1, characterised in that: A plurality of servo motors are fixedly installed on one side of the fixed disc away from the fixed sleeve, one lead screw is coaxially fixedly connected on the output shaft of each servo motor, one end of the lead screw penetrates through the fixed disc and is rotatably installed in the sliding groove, and the bottom of the connecting seat is threadedly assembled on the lead screw.

3. A grinding machine according to claim 2, characterised in that: The bottom of the clamping plate is fixedly connected with a connecting plate, the connecting plate is rotatably installed on the connecting seat, a spur gear is fixedly installed on the outer side of the connecting plate, the spur gear corresponds to the rack, the spur gear can be engaged with the rack when the connecting seat drives the clamping plate to move, a limit rod is fixedly connected on one side of the spur gear, and the limit rod corresponds to the limit groove.

4. A grinding machine according to claim 3, characterised in that: The driving assembly comprises a servo motor two and a transmission rod, the servo motor two is fixedly installed in the driving shaft, a conveying shaft of the servo motor two is coaxially fixedly connected with the transmission rod, the transmission rod is rotatably installed in the driving shaft, one end of the transmission rod penetrates through the fixed disc and extends into the fixed sleeve, an installation disc is fixedly connected to the end of the transmission rod, and a transmission bevel gear is fixedly connected to the installation disc.

5. A grinding machine according to claim 4, characterised in that: The driving assembly further comprises a driven rod, the driven rod is a threaded rod, the driven rod is rotatably installed on the mounting seat, the driving block is threadedly assembled on the threaded rod, a driven bevel gear is coaxially fixedly connected to a lower end of the driven rod, and the driven bevel gear is engaged with the transmission bevel gear.

6. A grinding machine according to claim 1, characterized in that: A partition plate is fixedly installed in the fixed sleeve, the partition plate separates the driving assembly from the open end of the fixed sleeve, and a clamping head is fixedly connected to the bottom of the driving block.

7. A grinding machine according to claim 1, characterized in that: A sliding table is fixedly installed in the processing bin, and the processing mechanism is slidably installed on the sliding table.

8. A method of machining for a brake assembly, characterized by: The grinding machine bed of any one of claims 1-7 is used, and the specific steps are as follows: First, the brake drum to be processed is sleeved on the fixed sleeve, then the driving assembly drives the driving block to move towards the upper end of the sliding groove, the supporting plate is extended out of the outer side of the fixed sleeve, the supporting plate abuts against the inner side of the brake drum, so that the brake drum is supported on the fixed sleeve, meanwhile, the connecting seat drives the horizontally placed clamping plate to move towards the side of the brake drum, the horizontally placed clamping plate rotates by 90 degrees during the movement, so that the clamping plate is clamped in the vertical state on the side of the brake drum, the brake drum is fixed on the fixed sleeve through the cooperation of the supporting plate and the clamping plate, and after the brake drum is fixed, the processing mechanism grinds the brake drum.

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