Grinding tool and process for convex worktable

Abstract

The present invention discloses a grinding tool and process for a convex workbench, comprising a tool body fixedly mounted on the grinding table, a receiving cavity being provided in the middle of the tool body, a convex supporting device being installed in the tool body, the convex supporting device comprising a convex block group, a lever pressure control mechanism and a lifting mechanism, a window communicating with the receiving cavity being provided in the middle of the upper end surface of the tool body, the convex block group comprising a convex block mounted in the receiving cavity just below the window for vertical sliding, a plurality of convex blocks being arranged continuously in the longitudinal direction, and the top ends of all the convex blocks being matched and inserted into the window to seal the window; the lifting mechanism being matched and installed in the receiving cavity below the convex block group and being connected to the lever pressure control mechanism; the present invention realizes rapid and accurate fixing of inner concave parts through the combination of hydraulic and mechanical structures, thereby improving processing quality and efficiency.

Description

Technical Field

[0001] The invention belongs to the field of grinding processing of inner concave parts, and in particular relates to a grinding tool and process for a convex workbench. Background Art

[0002] The basic principle of grinding is to use the abrasive grains on the grinding tool to make tiny cuts on the workpiece surface through the high-speed rotating grinding tool in contact with the workpiece surface, remove part of the material, and achieve the required geometric shape and surface roughness. Before grinding, the workpiece needs to be fixed in position using a grinding tool to reduce the risk of operators during the processing and improve the safety of the operation. If the fixation is not firm, the workpiece may be displaced, resulting in scratches and unevenness on the surface, affecting the surface quality of the final product and causing the processed size and shape to not meet the requirements.

[0003] When performing bottom grinding on concave parts such as rails, the concave part needs to be turned upside down on the grinding table with the concave surface facing downward and the surface to be processed facing upward, and then the concave part is clamped and fixed using a clamp. However, traditional clamps have poor adaptability to concave parts of different sizes, and the clamps need to be frequently replaced and adjusted, which increases the complexity and time cost of operation. In addition, traditional clamps usually use mechanical clamping methods, which makes it difficult to ensure the stability and consistency of the concave part during the processing process, and can easily cause the workpiece to move, affecting the processing accuracy. Summary of the invention

[0004] In view of the defects and problems existing in the existing grinding process of inner concave parts, the present invention provides a grinding tool and process for a convex workbench, which realizes fast and accurate fixation of inner concave parts through the combination of a hydraulic system and a mechanical structure, thereby improving the processing quality and efficiency.

[0005] The solution adopted by the present invention to solve the technical problem is:

[0006] A grinding tool for a convex workbench comprises a tool body fixedly mounted on the grinding table, a receiving cavity is arranged in the middle of the tool body, a convex support device is installed in the tool body, the convex support device comprises a convex block group, a lever pressure control mechanism and a lifting mechanism, a window connected to the receiving cavity is arranged in the middle of the upper end surface of the tool body, the convex block group comprises a convex block mounted in the receiving cavity directly below the window along the vertical sliding, a plurality of convex blocks are arranged continuously along the longitudinal direction, and the top ends of all the convex blocks are matched and inserted into the window to block the window; the lifting mechanism is matched and installed in the receiving cavity below the convex block group and connected with the lever pressure control mechanism, and the lifting mechanism can be controlled by the lever pressure control mechanism to synchronously give all the convex blocks a top thrust to slide upward and extend out of the tool body, and all the convex blocks are subjected to the same top thrust; edge limiting mechanisms are symmetrically installed at the edges of the tool body on the left and right sides of the window, and the edge limiting mechanism comprises a limit pressing arm and a guide locking assembly, and the limit pressing arm is arranged in the longitudinal direction and is vertically slidably mounted on the tool body through the guide locking assembly.

[0007] A accommodating box matching and docking with the window is installed on the upper cavity wall of the accommodating cavity, an opening is provided at the middle bottom of the accommodating box, the middle convex block is installed in the accommodating box along the vertical sliding, the lifting mechanism is installed in the accommodating cavity below the opening, and passes through the opening to be connected with the bottom of each middle convex block.

[0008] The lifting mechanism includes a support cylinder arranged under each middle bulge, the top end of the piston rod of the support cylinder is vertically connected to the bottom surface of the middle bulge, the support cylinder is a single-acting cylinder for oil injection, extension, oil discharge and retraction, the oil inlet and outlet holes of the support cylinder are connected with oil pipes, and the other end of the oil pipes is connected to the lever pressure control mechanism.

[0009] The table top of the tooling body is extended forwardly to be provided with a table top extension section, and the lever pressure control mechanism includes a lever and an oil storage cylinder arranged along a lateral interval, one end of the lever is hinged to the bottom surface of the table top extension section, and the other end is inclined toward the bottom of the oil storage cylinder and extends out of the tooling body to install a counterweight rotary lock assembly, the cylinder bottom of the oil storage cylinder is hinged to the bottom surface of the table top extension section, and the piston rod of the oil storage cylinder is hinged to the middle part of the lever; the oil storage cylinder is a single-acting oil cylinder that is extended for oil filling, retraction and oil discharge, and the oil inlet and outlet holes of the oil storage cylinder are connected to the oil inlet and outlet holes of all supporting cylinders through the counterweight rotary lock assembly.

[0010] The counterweight rotary lock assembly includes a fixed shaft fixedly connected to the lever, an oil drainage channel axially arranged in the fixed shaft, and the oil drainage channel is connected to the oil inlet and outlet holes of each supporting cylinder; a locking sleeve is rotatably mounted on the fixed shaft, and a driving handle is radially fixedly installed on the outer ring surface of the locking sleeve; a connecting hole connected to the oil drainage channel is radially arranged on the fixed shaft on the inner side of the locking sleeve, and the outer opening of the connecting hole is blocked by the inner ring surface of the locking sleeve, and an oil hole matching the connecting hole is arranged on the locking sleeve, and the oil hole is connected to the oil inlet and outlet holes of the oil storage cylinder; when the driving handle is vertically upward, the oil hole on the locking sleeve overlaps and is connected with the connecting hole.

[0011] The driving wrench includes a fixed column arranged radially, one section of the fixed column is fixedly connected to the locking sleeve, a handle rod is installed on the other end of the fixed column away from the end face of the tooling body, a locking hole is horizontally provided on the upper edge of the fixed column below the handle rod, a locking rod is horizontally slidably installed in the lock hole, a baffle is matched with the end of the locking rod away from the tooling body, an extension section of the table is vertically connected to the bottom surface of the side adjacent to the fixed column, and a socket matching the locking rod is horizontally provided on the upper edge of the plug block.

[0012] Shallow grooves are longitudinally provided at the edges of the tooling body on both sides of the window, and the size of the shallow grooves is the same as the size of the limiting pressure arm. The bottom of the shallow groove on the front or rear side of the window is vertically provided with a device groove, and the guide locking assembly includes a guide sleeve vertically fixedly installed in the device groove, a support rod is vertically slidably installed in the guide sleeve, the top of the support rod extends the guide sleeve upward and is vertically connected to the bottom surface of the root of the limiting pressure arm; the outer ring surface of the top end of the guide sleeve is radially provided with a threaded hole connected to the inside, and is matched with a clamping bolt installed.

[0013] A grinding process for a convex worktable comprises the following steps:

[0014] Step 1: First, lift and lock the limit pressure arms on both sides of the tooling body window; and the lifting height of the limit pressure arms is greater than the height of the inner concave part to be processed;

[0015] Step 2: Place the inner concave part to be processed on the tooling body in the horizontal direction, align the concave part to be processed with the window position, and place the two ends of the inner concave part to be processed under the two limit pressure arms respectively;

[0016] Step 3: Adjust the height of the two limit pressing arms so that they press down the concave part to be processed, and lock the height of the pressing arms;

[0017] Step 4: Control the lifting mechanism through the lever pressure control mechanism to synchronously give all the middle convex blocks a pushing force to slide upward and extend out of the tooling body, and use the middle convex blocks located in the top projection of the inner concave part to be processed to push the inner concave part to be processed upward to tightly contact with the limit pressure arms on both sides, and the pushing force of each middle convex block that contacts the inner concave part to be processed is the same;

[0018] Step 5: Control the grinding equipment on the grinding table to grind the inner concave part to be processed.

[0019] Beneficial effects of the present invention:

[0020] 1. The grinding tool and process of the convex workbench provided by the present invention can accurately fix concave parts of various shapes and sizes through the coordinated action of the convex support device and the edge limit mechanism, reduce vibration and displacement during the processing, and thus significantly improve the accuracy of the grinding process.

[0021] 2. In the grinding tooling and process of a center convex workbench provided by the present invention, the center convex support device can automatically adjust the protruding length of the center convex block according to the actual shape of the inner concave part, so that the top of the center convex block group forms a shape that matches the concave surface of the inner concave part. This not only increases the contact area, but also ensures uniform pressure distribution, enhances the fixing effect, and avoids loosening during processing.

[0022] 3. The grinding tool and process of the center convex workbench provided by the present invention can easily realize the rise and fall of the center convex block and the position adjustment of the limit pressure arm through the combined use of the lever control pressure mechanism and the guide locking assembly, which simplifies the operation process and improves work efficiency. In addition, the design of the counterweight rotating lock assembly allows the state of the center convex block to be quickly locked or released, further improving the convenience of operation.

[0023] 4. The grinding tool and process of the convex workbench provided by the present invention can adapt to concave parts of different shapes and sizes, without the need for frequent replacement or adjustment of the tool, thereby reducing production costs and improving equipment utilization.

[0024] 5. The grinding tooling and process of a convex workbench provided by the present invention adopts a mechanical linkage design, which avoids possible failures of the electrical control system and improves the safety of operation; the design of the guide locking assembly and the square guide sleeve prevents the limit pressure arm from rotating during the lifting process, ensuring the stability of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of a grinding tool for a convex workbench of the present invention.

[0026] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure of the tooling body.

[0027] Figure 3 yes Figure 2 Schematic diagram of the middle lever pressure control mechanism 32 and its surrounding structures.

[0028] Figure 4 It is a schematic diagram of the structure of the middle bump group.

[0029] Figure 5 It is a schematic diagram of the guide locking assembly structure.

[0030] Figure 6 It is a schematic diagram of the connection between the locking cylinder and the push button switch.

[0031] Figure 7 It is a schematic diagram of the structure of the counterweight rotating lock assembly.

[0032] Figure 8 It is a schematic diagram of the matching relationship between the fixed shaft and the locking sleeve.

[0033] Fig. 9 This is a schematic diagram of the installation position of the transition rod.

[0034] Meaning of the reference numerals in the figures:

[0035] 1. Grinding table; 2. Tool body; 21. Accommodating cavity; 22. Window; 23. Shallow groove; 24. Device groove; 25. Table extension section; 3. Middle convex support device; 31. Middle convex block group; 311. Middle convex block; 32. Lever control pressure mechanism; 321. Lever; 322. Oil storage cylinder; 33. Accommodating box; 331. Open; 332. Sliding rod; 34. Support cylinder; 4. Edge limit mechanism; 41. Limit pressure arm; 42. Guide locking assembly; 421. Guide sleeve; 422. Support rod; 43. Locking cylinder; 44. Push button switch; 441. Switch housing; 442. First oil hole; 4 43. Second oil hole; 444. Blocking piston; 4441. Connecting channel; 445. Connecting section; 446. Pressing plate; 447. Top spring; 448. Three-way joint; 5. Counterweight rotary lock assembly; 51. Fixed shaft; 511. Oil discharge channel; 512. Connecting hole; 52. Locking sleeve; 521. Oil hole; 53. Limiting ring plate; 54. Driving handle; 541. Fixed column; 542 Handle rod; 543. Locking rod; 544. Baffle; 545. Transition rod; 55. Insert block; 61. Compensator housing; 62. Compensating oil hole; 63. Air vent; 64. Compensating piston; 65. Second top spring. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0037] Example: Reference Figure 1-Figure 9 .

[0038] In view of the problems raised in the above background technology, this embodiment provides a grinding tool for a convex workbench, such as Figure 1 , Figure 2As shown, it includes a tool body 2 fixedly mounted on a grinding table 1, a receiving cavity 21 is provided in the middle of the tool body 2, a convex support device is installed in the tool body 2, a window 22 connected to the receiving cavity 21 is provided in the middle of the upper end surface of the tool body 2, and edge limiting mechanisms 4 are symmetrically installed at the edges of the tool body 2 on the left and right sides of the window 22. After the inner concave part to be processed is inverted on the tool body 2, the left and right ends of the inner concave part to be processed can be pressed and constrained by the edge limiting mechanisms 4 symmetrically arranged on the left and right sides.

[0039] like Figure 2 , Figure 3 and Figure 5 As shown, the edge limiting mechanism 4 includes a limiting pressure arm 41 and a guide locking assembly 42. The limiting pressure arm 41 is arranged in the longitudinal direction and is slidably installed on the tooling body in the vertical direction through the guide locking assembly 42. Specifically: shallow grooves 23 are arranged in the longitudinal direction at the edges of the tooling body 2 on the left and right sides of the window 22. The size of the shallow groove 23 is the same as that of the limiting pressure arm 41. When the edge limiting mechanism 4 is not in use, it is used to store the limiting pressure arm 41; a device groove 24 is arranged vertically at the bottom of the shallow groove 23. The guide locking assembly 42 includes a guide sleeve 421 fixedly installed in the device groove 24 in the vertical direction. The guide sleeve A support rod 422 is vertically slidably installed along the inner side of 421, and a guide sleeve 421 extends upward from the top of the support rod 422 and is vertically connected to the bottom surface of the root of the limiting pressure arm 41, and the cavity in the guide sleeve 421 and the support rod 422 are both square, thereby preventing the limiting pressure arm from rotating during the lifting process; the outer ring surface of the top end of the guide sleeve is radially provided with a threaded hole connected to the interior, and a clamping bolt is matched and installed. When the clamping bolt is tightened, the end of the clamping bolt will pass through the threaded hole into the guide sleeve and be fixed together with the support rod 422, thereby fixing the height of the limiting pressure arm 41.

[0040] like Figure 1 , Figure 2 As shown, the central convex support device 3 includes a central convex block group 31, a lever pressure control mechanism 32 and a lifting mechanism. The central convex block group 31 includes a central convex block 311 vertically slidably installed in the accommodating cavity 21 just below the window 22, as shown in FIG. Figure 4 As shown, a plurality of middle convex blocks 311 are arranged in a row along the longitudinal direction, for example, the number of middle convex blocks in this embodiment is five; and all the middle convex blocks 311 are inserted into the window 22, and each middle convex block 311 just blocks the window 22. The lifting mechanism is matched and installed in the accommodating cavity 21 below the middle convex block group, and is connected to the lever control and pressure mechanism 32. The lever control and pressure mechanism controls the lifting mechanism to synchronously give all the middle convex blocks a top thrust to slide upward and extend out of the tooling body, so that each middle convex block located in the top projection of the inner concave part to be processed is in contact with the downward concave surface of the upper inner concave part to be processed, and the inner concave part to be processed is clamped in cooperation with the limit pressure arms on the left and right sides of the inner concave part to be processed. Specifically:

[0041] like Figure 3 As shown, a receiving box 33 connected to the window is matched and installed on the upper cavity wall of the receiving cavity 21 for installing and placing the middle convex block group; an opening 331 is provided at the bottom of the middle box 33 for facilitating the lifting mechanism to extend into the receiving box and connect with the middle convex block 311; the middle convex block 311 is installed in the receiving box 33 along the vertical sliding path, and the lifting mechanism is installed in the receiving cavity 21 below the opening 331, and passes through the opening 331 to connect with the bottom of each middle convex block 311; there are many ways to install the middle convex block 311 vertically slidingly, for example: sliding holes are vertically provided on the bottom of the receiving box on the left and right sides of the opening below each middle convex block 311, and sliding rods 332 are matched and installed in the sliding holes, and the top of the sliding rod 332 is vertically connected to the bottom surface of the upper middle convex block. When the middle convex block is driven to be lifted, the sliding rods at the bottom of the left and right ends thereof will be driven to slide synchronously along the sliding holes, thereby constraining the sliding trajectory of the middle convex block, and preventing the problem that the lifting trajectory cannot be constrained due to the separation of two adjacent middle convex blocks due to different lifting heights.

[0042] The lifting mechanism includes a support cylinder 34. A support cylinder 34 is vertically fixedly installed on the bottom of the accommodating cavity below each middle convex block 311. The top end of the piston rod of the support cylinder 34 passes through the bottom opening of the accommodating box and is vertically connected to the bottom surface of the corresponding middle convex block. Each support cylinder is a single-acting oil cylinder for oil injection, extension, oil discharge and retraction. The oil inlet and outlet holes of the support cylinder are connected with oil pipes, and the other end of the oil pipes is connected to the lever pressure control mechanism. The oil inlet and outlet holes of each support cylinder are connected to each other, so that the same thrust force is given to the inner concave part to be processed by each middle convex block located in the top projection of the inner concave part to be processed when in use. Specifically:

[0043] like Figure 1 , Figure 2 As shown, the table of the tool body 2 is extended forward to form a table extension section 25, and the lever control pressure mechanism 32 is as shown in FIG. Figure 3As shown, it includes a lever 321 and an oil storage cylinder 322 arranged at a horizontal interval. One end of the lever 321 is hinged to the bottom surface of the table extension section, and the other end is tilted toward the bottom of the oil storage cylinder 322, and extends out of the tooling body to install the counterweight lock assembly 5. The cylinder bottom of the oil storage cylinder 322 is hinged to the bottom surface of the table extension section, and the piston rod of the oil storage cylinder 322 is hinged to the middle part of the lever 321; the oil storage cylinder 322 is an existing single-acting oil cylinder for oil injection, retraction and oil discharge extension, including a cylinder body, a piston is vertically slidably installed in the cylinder body, and the piston seals and separates the interior of the cylinder body from top to bottom into an upper and lower cavity. The bottom of the cylinder body is provided with an exhaust hole connected to the lower cavity, and the top of the cavity is provided with an oil inlet and outlet hole connected to the upper cavity. The upper end surface of the piston is vertically A piston rod is installed, and the top of the piston rod extends upward out of the cylinder body; the oil inlet and outlet holes of the oil storage cylinder are connected with the oil inlet and outlet holes of all the supporting cylinders through a counterweight turn lock assembly. When the lever is pressed down, the lever will pull the piston rod of the oil storage cylinder during the downward rotation process to drive the piston of the oil storage cylinder to move, thereby squeezing the hydraulic oil in the upper chamber of the oil storage cylinder from the oil inlet and outlet ports and discharge it into each supporting cylinder, so that the telescopic rod of the supporting cylinder extends upward, so that the middle protrusion 311 is lifted; conversely, when the lever is lifted, the lever will push the piston rod into the cylinder body of the oil storage cylinder during the upward rotation process to drive the piston of the oil storage cylinder to move, so that the upper chamber of the oil storage cylinder generates negative pressure, thereby drawing the hydraulic oil discharged into each supporting cylinder back into the oil storage cylinder, so that the piston rod of each supporting cylinder retracts and resets.

[0044] The structure of the counterweight lock assembly is as follows: Figure 7 As shown, it includes a fixed shaft 51 fixedly connected to the lever 321. When the oil storage cylinder 322 is in the initial retracted state, the fixed shaft 51 is in a horizontal state. Figure 8 The oil drain passage 511 shown is connected to the oil inlet and outlet holes of each support cylinder 34. There are multiple ways for the oil drain passage 511 to be connected to the oil inlet and outlet holes of each support cylinder 34. For example, an oil collector is matched and installed in the accommodating cavity. The oil collector includes a main pipe with blocked ends. The main pipe is provided with a main connection port and multiple auxiliary connection ports. The number of auxiliary connection ports is the same as the number of support cylinders. The main connection port is connected to the oil drain passage through an oil pipe, and the auxiliary connection port is connected to the oil inlet and outlet holes of the corresponding support cylinder through an oil pipe.

[0045] Figure 8The figure shows the matching relationship between the fixed shaft 51 and the locking sleeve 52. The locking sleeve 52 is rotatably sleeved on the fixed shaft 51. The locking sleeve 52 is fixedly sleeved on the fixed shaft 51 on both sides of the locking sleeve 52. The limiting ring plates 53 are fixedly sleeved on the fixed shaft 51 on both sides of the locking sleeve 52 to constrain the position of the locking sleeve and prevent it from sliding axially. A driving handle 54 is fixedly installed radially on the upper surface of the outer ring of the locking sleeve 52. A connecting hole 512 connected to the oil discharge channel 511 is radially provided on the fixed shaft 51 inside the locking sleeve 52. The outer opening of the connecting hole 512 is blocked by the inner ring of the locking sleeve 52. 2 is provided with an oil hole 521 matching the connecting hole, and the oil hole 521 is connected with the oil inlet and outlet holes of the oil storage cylinder 322 through an oil pipe; when the driving handle is vertically upward, the oil hole 521 on the lock sleeve is overlapped and connected with the connecting hole 512. In this state, when the lever is pressed down by the driving handle, the hydraulic oil stored in the oil storage cylinder will pass through the oil hole in the connected state and the connecting hole, and be discharged into each support cylinder through the oil discharge channel, thereby driving the support cylinder to extend and push the middle convex block upward. During the upward movement of the middle convex block, the inner concave part is located at the top view of the inner concave part. Each middle convex block in the projection will come into contact with the upper inner concave part, and push the inner concave part upward to come into close contact with the limiting pressure arms on both sides, thereby fixing the inner concave part on the tooling body. Compared with the traditional clamping, the grinding tooling provided in this embodiment is provided with oil from the same oil storage cylinder 322 because each supporting cylinder 34 is supplied with oil. Under the constraint of the limiting pressure arms on the left and right sides, each middle convex block 311 will automatically constrain the extension length according to the different contact positions of the inner concave part, so that the top of the middle convex block group forms a contact with the concave surface of the inner concave part. The matching shapes can effectively improve the fixing strength of the inner concave part and prevent it from moving during the grinding process. Moreover, since each supporting cylinder is supplied with oil by an oil storage cylinder, the pushing force of the middle convex block located in the top projection of the inner concave part to push the inner concave part upward is the same. After the inner concave part is fixed, the driving handle 54 is pulled to drive the locking sleeve to rotate so that the oil hole 521 on the locking sleeve is misaligned with the connecting hole 512, so that the state of each middle convex block can be quickly locked to prevent the inner concave part from loosening during the grinding process.

[0046] like Figure 5 and Figure 6As shown, a locking cylinder 43 is also fixedly installed in the device groove 24 on one side of the guide sleeve 421. The locking cylinder 43 is an existing ordinary double-acting cylinder. The piston rod of the cylinder retracts when the upper oil chamber is filled with oil and the lower oil chamber is drained, and the piston rod of the cylinder extends when the lower oil chamber is filled with oil and the upper oil chamber is drained. The locking cylinder is fixedly installed vertically in the device groove 24. The locking cylinder 43 is arranged in parallel and spaced apart from the guide sleeve. The piston rod of the locking cylinder is arranged upward and is vertically connected to the bottom surface of the limit pressure arm 41. A button switch 44 is fixedly installed on the bottom surface of the limit pressure arm 41 between the locking cylinder 43 and the guide sleeve. The button switch includes a switch housing 441 fixedly installed on the bottom surface of the limit pressure arm. The switch housing 441 has a first oil hole 442 and a second oil hole 443 symmetrically arranged on the left and right sides thereof that are connected to the interior thereof. The first oil hole 442 is connected to the lower oil chamber of the locking cylinder through an oil pipe, and the second oil hole 44 3 is communicated with the upper oil chamber of the locking oil cylinder 43 through an oil pipe, and a hydraulic compensator is arranged between the upper oil chamber of the locking oil cylinder 43 and the second oil hole 443, and a three-way joint 448 is matched and installed on the oil pipe connecting the upper oil chamber of the locking oil cylinder 43 and the second oil hole 443, and the third port of the three-way joint 448 is communicated with the hydraulic compensator. Specifically: the hydraulic compensator includes a compensator housing 61 with a piston chamber provided therein, a compensating oil hole 62 communicating with the internal piston chamber is matched and arranged at the top of the compensator housing, a vent hole 63 communicating with the internal piston chamber is arranged at the bottom of the compensator housing 61, and the compensating oil hole 62 is communicated with the third port of the three-way joint 448; a compensating piston 64 is matched and installed in the compensating housing 61, and the piston chamber of the compensating piston 64 close to the compensating oil hole 62 is filled with hydraulic oil, and the piston chamber of the compensating piston 64 away from the compensating oil hole is matched and installed with a second top spring 65.

[0047] A blocking piston 444 is matched and installed in the switch housing 441 so as to slide vertically. A connecting channel 4441 is horizontally provided on the upper edge of the blocking piston 444, which is connected to the first oil hole 442 and the second oil hole 443. A connecting section 445 is coaxially fixed to the bottom surface of the blocking piston 444. The connecting section extends downward out of the switch housing 441 and is connected to a pressing plate 446. A top spring 447 is matched and installed in the switch housing above the top of the blocking piston. In a natural state, the top spring pushes the sealing piston downward to disconnect the connecting channel 4441 from the first oil hole 442 and the second oil hole 443 on the left and right sides. , the inner openings of the first oil hole 442 and the second oil hole 443 are blocked by the outer ring surface of the sealing piston. When the height of the limit pressure arm is adjusted during use, the pressure plate is pressed to drive the connecting section to retract so that the connecting channel 4441 is connected to the first oil hole 442 and the second oil hole 443, and then the limit pressure arm is lifted upward. The piston rod of the locking cylinder 43 will extend upward with the lifting of the limit pressure arm. In this process, the hydraulic oil in the upper oil chamber of the locking cylinder 43 will be discharged into the lower oil chamber of the locking cylinder 43 through the button switch 44 in the turned-on state. Since the volumes of the upper oil chamber and the lower oil chamber of the locking cylinder 43 are different, During the movement of the internal piston of the locking cylinder 43, the hydraulic oil in the compensator will be sucked for compensation. Specifically: when the internal piston of the locking cylinder 43 moves upward, the hydraulic oil in the upper oil chamber of the locking cylinder 43 will be discharged into the lower oil chamber of the locking cylinder 43 through the button switch 44 in the turned-on state. During this process, under the action of the negative pressure in the lower oil chamber of the locking cylinder 43 and the pushing of the second top spring 65, the hydraulic oil compensator will discharge the hydraulic oil outward to compensate for the amount of hydraulic oil discharged from the upper oil chamber of the locking cylinder 43, so that the piston of the locking cylinder 43 can move upward; conversely, when the internal piston of the locking cylinder 43 moves downward When the locking cylinder 43 is in the open state, the hydraulic oil in the lower oil chamber of the locking cylinder 43 will be discharged into the upper oil chamber of the locking cylinder 43 through the button switch 44 in the open state. During this process, under the action of the positive pressure in the lower oil chamber of the locking cylinder 43, the excess hydraulic oil will be discharged into the hydraulic compensator, so that the piston of the locking cylinder 43 can move downward; thus, after the adjustment is completed and the pressing plate 446 is released and the button switch is automatically closed, the extended length of the piston rod of the locking cylinder 43, that is, the limit pressure arm, will be automatically locked. Compared with locking by only tightening the clamping bolt, the height of the limit pressure arm can be quickly locked by the cooperation of the locking cylinder 43 and the button switch 44.

[0048] like Figure 7 , Fig. 9As shown, the driving handle 54 includes a fixed column 541 arranged in a radial direction, one end of the fixed column 541 is fixedly connected to the lock sleeve 52, and the other end of the fixed column 541 is installed with a handle rod 542 at an end surface away from the tool body 2, and a lock hole is arranged horizontally on the fixed column 541 below the handle rod 542, and a lock rod 543 is installed in the lock hole along the horizontal sliding direction, and a baffle 544 is matched with the end of the lock rod away from the tool body 2, and an insert block is vertically connected to the bottom surface of the table extension section 25 adjacent to the fixed column 541, and the insert block A socket that matches the locking rod is provided horizontally on the upper edge of the block. When the oil hole 521 on the locking sleeve is connected to the connecting hole 512 on the fixed shaft, and the oil storage cylinder 322 is in the initial retracted state, the locking hole and the socket are in a coaxial state. At this time, the locking rod can be pushed to insert it into the socket of the plug block to lock the position of the lever 321, so that the middle convex block group remains in the retracted state, which can effectively prevent the middle convex block from extending out to interfere and affect the processing operation when the table surface of the tooling body is used to process other workpieces.

[0049] like Fig. 9 As shown, the handle rod 542 is hingedly installed with the fixed column 541, and a transition pull rod 545 is hingedly installed at the bottom of the handle rod 542. The other end of the transition pull rod 545 is hingedly connected to the baffle 544 at the end of the plug rod. When the handle rod is lifted upward, the handle rod will pull the locking rod out of the socket on the plug block through the transition pull rod, and then pressing the handle rod can drive the lever to rotate downward to stretch the oil storage cylinder.

[0050] This embodiment provides a grinding process for a convex worktable, comprising the following steps:

[0051] Step 1: First, lift and lock the limit pressure arms on both sides of the tooling body window; and the lifting height of the limit pressure arms is greater than the height of the inner concave part to be processed;

[0052] Step 2: Place the inner concave part to be processed on the tooling body in the horizontal direction, align the concave part to be processed with the window position, and place the two ends of the inner concave part to be processed under the two limit pressure arms respectively;

[0053] Step 3: Adjust the height of the two limit pressing arms so that they press down the concave part to be processed, and lock the height of the pressing arms;

[0054] Step 4: Control the lifting mechanism through the lever pressure control mechanism to synchronously give all the middle convex blocks a pushing force to slide upward and extend out of the tooling body, and use the middle convex blocks located in the top projection of the inner concave part to be processed to push the inner concave part to be processed upward to tightly contact with the limit pressure arms on both sides, and the pushing force of each middle convex block that contacts the inner concave part to be processed is the same;

[0055] Step 5: Control the grinding equipment on the grinding table to grind the inner concave part to be processed.

[0056] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A grinding tool for a convex worktable, comprising a tool body (2) fixedly mounted on a grinding table (1), a receiving cavity (21) being provided in the middle of the tool body (2), characterized in that: A central convex support device is installed in the tool body (2), and the central convex support device includes a central convex block group (31), a lever pressure control mechanism (32) and a lifting mechanism. A window (22) communicating with the accommodating cavity (21) is provided in the middle of the upper end surface of the tool body (2). The central convex block group (31) includes a central convex block (311) installed in the accommodating cavity (21) directly below the window (22) in a vertically sliding manner. A plurality of central convex blocks (311) are arranged in a row in the longitudinal direction, and the top ends of all the central convex blocks (311) are matched and inserted into the window (22) to block the window (22). The lifting mechanism is matched and installed in the central convex block group. The lever control mechanism (32) controls the lifting mechanism to synchronously give all the middle protrusions (311) a top thrust force to slide upward and extend out of the tooling body, and all the middle protrusions (311) are subjected to the same top thrust force; edge limiting mechanisms are symmetrically installed at the edges of the tooling body (2) on the left and right sides of the window (22), and the edge limiting mechanisms include a limit pressing arm (41) and a guide locking assembly (42); the limit pressing arm (41) is arranged in the longitudinal direction, and is slidably installed on the tooling body (2) in the vertical direction through the guide locking assembly (42).

2. The grinding tool for a convex workbench according to claim 1, characterized in that: A accommodating box (33) is matched and mounted on the upper cavity wall of the accommodating cavity (21) and is connected to the window. An opening (331) is provided at the bottom of the middle part of the accommodating box (33). The middle protrusion (311) is mounted in the accommodating box (33) in a vertically slidable manner. The lifting mechanism is mounted in the accommodating cavity (21) below the opening (331) and is connected to the bottom of each middle protrusion (311) through the opening (331).

3. The grinding tool for a convex workbench according to claim 1, characterized in that: The lifting mechanism comprises a support cylinder (34) arranged below each middle convex block (311); the top end of a piston rod of the support cylinder (34) is vertically connected to the bottom surface of the middle convex block (311); the support cylinder (34) is a single-acting oil cylinder for oil injection, extension, oil discharge and retraction; the oil inlet and outlet holes of the support cylinder (34) are connected to an oil pipe, and the other end of the oil pipe is connected to the lever pressure control mechanism (32).

4. The grinding tool for a convex workbench according to claim 3, characterized in that: The table of the tooling body (2) is provided with a table extension section (25) extending forward, and the lever pressure control mechanism (32) comprises a lever (321) and an oil storage cylinder (322) arranged at intervals in the transverse direction. One end of the lever (321) is hinged to the bottom surface of the table extension section (25), and the other end is tilted toward the bottom of the oil storage cylinder (322) and extends out of the tooling body (2) to install a counterweight rotary lock assembly (5). The cylinder bottom of the oil storage cylinder (322) is hinged to the bottom surface of the table extension section (25), and the piston rod of the oil storage cylinder (322) is hinged to the middle part of the lever (321). The oil storage cylinder (322) is a single-acting oil cylinder that can be filled with oil, retracted, discharged, and extended. The oil inlet and outlet holes of the oil storage cylinder (322) are connected to the oil inlet and outlet holes of each supporting cylinder (34) through the counterweight rotary lock assembly (5).

5. The grinding tool for a convex workbench according to claim 4, characterized in that: The counterweight rotary lock assembly (5) comprises a fixed shaft (51) fixedly connected to a lever, wherein an oil discharge passage (511) is axially arranged in the fixed shaft (51), and the oil discharge passage (511) is communicated with the oil inlet and outlet holes of each supporting cylinder (34); a lock sleeve (52) is rotatably mounted on the fixed shaft (51), and a driving handle (54) is radially fixedly mounted on the outer ring surface of the lock sleeve (52); a communicating hole (512) communicating with the oil discharge passage (511) is radially arranged on the fixed shaft (51) inside the lock sleeve (52), and the outer opening of the communicating hole (512) is blocked by the inner ring surface of the lock sleeve (52); an oil hole (521) matching the communicating hole (512) is arranged on the lock sleeve (52), and the oil hole (521) is communicated with the oil inlet and outlet holes of the oil storage cylinder; when the driving handle (54) is vertically upward, the oil hole (521) on the lock sleeve overlaps and communicates with the communicating hole (512).

6. The grinding tool for a convex workbench according to claim 5, characterized in that: The driving handle (54) comprises a fixed column (541) arranged in a radial direction, one end of the fixed column (541) is fixedly connected to the locking sleeve (52), and the other end is provided with a handle rod (542) on an end surface away from the tool body (2), a locking hole is provided in the horizontal direction on the upper edge of the fixed column below the handle rod (542), a locking rod (543) is slidably installed in the lock hole in the horizontal direction, a baffle (544) is matched and installed on the end of the locking rod (543) away from the tool body, and an insert block (55) is vertically connected to the bottom surface of the table extension section (25) adjacent to the fixed column, and an insert hole matching the locking rod is provided in the horizontal direction on the upper edge of the insert block.

7. The grinding tool for a convex workbench according to claim 1, characterized in that: Shallow grooves (23) are longitudinally provided at the edges of the tooling body on both sides of the window (22), the size of the shallow groove (23) being the same as the size of the limit pressure arm (41), and a device groove (24) is vertically provided at the bottom of the shallow groove, and the guide locking assembly (42) comprises a guide sleeve (421) vertically fixedly installed in the device groove (24), a support rod (422) is vertically slidably installed in the guide sleeve (421), the top of the support rod (422) extends upward from the guide sleeve (421) and is vertically connected to the bottom surface of the root of the limit pressure arm (41); a threaded hole communicating with the interior is radially provided on the outer ring surface of the top end of the guide sleeve (421), and a clamping bolt is matched and installed.

8. A grinding process for a convex worktable, characterized in that: The grinding tool for the convex worktable according to any one of claims 1 to 7 comprises the following steps: Step 1: First, lift and lock the limit pressure arms on both sides of the tooling body window; and the lifting height of the limit pressure arms is greater than the height of the inner concave part to be processed; Step 2: Place the inner concave part to be processed on the tooling body in the horizontal direction, align the concave part to be processed with the window position, and place the two ends of the inner concave part to be processed under the two limit pressure arms respectively; Step 3: Adjust the height of the two limit pressing arms so that they press down the concave part to be processed, and lock the height of the pressing arms; Step 4: Control the lifting mechanism through the lever pressure control mechanism to synchronously give all the middle convex blocks a pushing force to slide upward and extend out of the tooling body, and use the middle convex blocks located in the top projection of the inner concave part to be processed to push the inner concave part to be processed upward to tightly contact with the limit pressure arms on both sides, and the pushing force of each middle convex block that contacts the inner concave part to be processed is the same; Step 5: Control the grinding equipment on the grinding table to grind the inner concave part to be processed.

Images