A balancing tool for processing double journal eccentric blades

Abstract

The present application relates to a counterweight tooling for processing double-journal eccentric blades, which is applied to the technical field of eccentric journal processing, and includes a base for clamping by a three-jaw chuck, the base is provided with a fixed cylinder for inserting the journal of the blade, the side wall of the fixed cylinder is provided with a clearance hole for the blade to extend into, the fixed cylinder is provided with a mounting block, the mounting block is detachably connected with a counterweight block, and the counterweight block is located on the side of the fixed cylinder away from the clearance hole. The present application has the effect of improving the processing accuracy of the journal surface.

Description

Technical Field

[0001] The present application relates to the technical field of eccentric journal processing, and in particular to a counterweight tooling for processing double-journal eccentric blades. Background Art

[0002] At present, the blade is the key part of the steam turbine, and it is also one of the most delicate and important parts. After the blade body is finely milled, the journal of the blade needs to be finely turned.

[0003] In the related technology, when the double journal of the blade is subjected to finish turning, the blade is installed on the three-jaw chuck of the CNC machine tool, and then the rotary center of the CNC machine tool is pressed against the center hole of the journal at the end of the blade away from the three-jaw chuck. The CNC machine tool is started, and the three-jaw chuck drives the journal to rotate. At the same time, the turning tool of the CNC machine tool moves toward the blade to turn the journal to complete the processing of the journal at one end. Then, the blade is removed and reinstalled on the three-jaw chuck so that the unprocessed journal faces the rotary center, and the above steps are repeated to turn the other journal to complete the finish turning of the double journal of the blade.

[0004] With respect to the above-mentioned related technologies, the inventors found that when finishing the journals at both ends of the blades, it is necessary to rotate the blades. Since the center of the blades is not on the axis of the journals, the blades will generate eccentric torque during processing, causing the journals of the blades to deflect, resulting in low processing accuracy of the journal surface, affecting the coaxiality of the double journals of the blades, and increasing the rate of product failures, so there is room for improvement. Summary of the invention

[0005] In order to improve the machining accuracy of the journal surface, the present application provides a counterweight tooling for machining double-journal eccentric blades.

[0006] The present application provides a counterweight tooling for machining double-journal eccentric blades using the following technical solution:

[0007] A counterweight tooling for processing double-journal eccentric blades, comprising a base for clamping by a three-jaw chuck, the base being provided with a fixing cylinder for inserting the shaft neck of the blade, the side wall of the fixing cylinder being provided with a clearance hole for the blade to extend into, the fixing cylinder being provided with a mounting block, the mounting block being detachably connected with a counterweight block, and the counterweight block being located on a side of the fixing cylinder away from the clearance hole.

[0008] By adopting the above technical scheme, when processing the journal, first insert the journal of the blade into the fixed cylinder, and extend the blade into the clearance hole, then install the counterweight block, and then clamp the base with the three-jaw chuck of the CNC machine tool to process the journal. After the journal at one end of the blade is processed, take the blade out of the fixed cylinder, insert it into the fixed cylinder in reverse, and then reinstall the appropriate counterweight block, and then clamp the base with the three-jaw chuck to process the journal at the other end. Since the counterweight block is located on the side of the fixed cylinder away from the clearance hole, when the three-jaw chuck rotates, the eccentric torque generated by the counterweight block can balance the eccentric torque generated by the blade, thereby reducing the deflection amplitude of the journal of the blade when the three-jaw chuck rotates, improving the processing accuracy of the journal surface, and improving the coaxiality of the double journals, thereby reducing the unqualified rate of the product.

[0009] Optionally, a connecting tube for clip-connecting the end of the fixing tube is fixed on the base.

[0010] By adopting the above technical solution, after the journal of one end of the blade is processed, the fixing tube is removed from the connecting tube, and then the other end of the fixing tube is clamped into the connecting tube. Since the positions of the blade and the counterweight block on the fixing tube are not changed relative to the fixing tube, there is no need to replace the matching counterweight block, which reduces the operating steps of processing the journal of the same blade, makes it convenient for the staff to perform double journal processing of the blade, and is beneficial to improving the efficiency of processing double journals.

[0011] Optionally, a pair of insertion strips are arranged opposite to each other at the ends of the fixed cylinder, the insertion strips are slidably connected to the fixed cylinder, and the side wall of the connecting cylinder facing away from the base is provided with two insertion holes for the insertion strips to be inserted, a clamping block is fixed to one end of the insertion strip facing away from the fixed cylinder, and a clamping groove is provided on the hole wall for the clamping block to slide into, a magnetic block 1 is arranged at the bottom of the clamping groove, and a magnetic block 2 is arranged on the clamping block for attracting the magnetic block 1.

[0012] By adopting the above technical solution, after one end of the blade is processed, the staff presses the two strips at the same time to separate the magnetic block one from the magnetic block two, and the snap-in block from the snap-in groove, and then separates the strip and the snap-in block from the socket to complete the removal of the fixing tube. Then, the fixing tube is flipped over so that the other end of the blade faces the connecting tube, and then the strip is plugged into the socket. Since the magnetic block one and the magnetic block two attract each other, the snap-in block automatically snaps into the snap-in groove to complete the inverted fixing tube. There is no need to replace the matching counterweight block, which reduces the operating steps of processing the shaft neck of the same blade, makes it convenient for the staff to perform double-shaft neck processing of the blade, and is beneficial to improving the efficiency of processing double-shaft necks.

[0013] Optionally, a sliding hole is opened in the outer tube wall of the connecting tube, a sliding rod is slidably inserted into the sliding hole, one end of the sliding rod passes through the bottom of the sliding hole and extends into the clamping groove, and the other end extends out of the opening of the sliding hole, the end of the sliding rod extending into the clamping groove is connected to the magnetic block, and a spring is connected between the end of the sliding rod extending out of the opening of the sliding hole and the outer tube wall of the connecting tube.

[0014] By adopting the above technical solution, when disassembling the fixed cylinder, the staff presses the two sliding bars at the same time, the sliding bar pushes the magnetic block one, the magnetic block one pushes the clamping block through the magnetic block two, so that the clamping block is disengaged from the clamping groove, and then the fixed cylinder is pulled away from the connecting cylinder to move, so that the insertion strip and the clamping block are disengaged from the insertion hole, and the removal of the fixed cylinder is completed. Compared with overcoming the attraction between the magnetic block one and the magnetic block two to push the insertion strip, the operation is more labor-saving, which is convenient for the staff to remove the fixed cylinder from the connecting cylinder, and convenient for the staff to perform double-journal processing of the blade, which is beneficial to improving the efficiency of double-journal processing.

[0015] Optionally, an adjustment block is provided on a side of the counterweight block facing away from the fixed tube, and an adjustment member for adjusting the distance between the adjustment block and the fixed tube is connected between the counterweight block and the adjustment block.

[0016] By adopting the above technical solution, the distance between the adjusting block and the fixed cylinder is adjusted through the adjusting piece, thereby changing the size of the eccentric torque generated by the adjusting block when the three-jaw chuck rotates, so as to improve the balancing effect of the eccentric torque of the blade, which is beneficial to further reduce the deflection amplitude of the blade journal, further improve the machining accuracy of the journal surface, and further reduce the unqualified rate of the product.

[0017] Optionally, the adjusting member is configured as screw one for placing an adjusting plate, screw one is fixed on the side wall of the counterweight block facing the adjusting block, screw one is threadedly connected to the adjusting block, a support plate for pressing the adjusting plate against the sliding rod is slidably provided on the counterweight block, screw two is rotatably provided on the counterweight block, and one end of the screw two facing away from the counterweight block is threadedly connected to the support plate.

[0018] By adopting the above technical solution, the adjusting block is rotated. Since screw one is fixed on the counterweight block, screw one pushes the adjusting block toward or away from the counterweight block, thereby changing the distance between the adjusting block and the counterweight block, and then adjusting the distance between the adjusting block and the fixed cylinder. The staff can place a number of adjustment plates on screw one to further increase the overall counterweight of the counterweight block, thereby increasing the adjustment range of the eccentric torque generated by the counterweight block, which is conducive to adapting to blades with larger eccentric torque. There is no need for the staff to repeatedly replace the counterweight block for adjustment, which is convenient for the staff to balance the eccentric torque of the blade, which is conducive to improving the shaft neck efficiency of processing the blade.

[0019] Optionally, two locking pins for pressing against the blade are provided on the fixed cylinder. The two locking pins are symmetric about the axis of the fixed cylinder, and the axis of the locking pin intersects with the axis of the fixed cylinder.

[0020] By adopting the above technical solution, the locking pins increase the resistance that needs to be overcome for the blade to move or rotate, which is beneficial to reducing the possibility of the blade shifting or deflecting when the three-jaw chuck rotates, is beneficial to further improving the machining accuracy of the journal surface, and further reduces the unqualified rate of the product.

[0021] Optionally, a number of fine-tuning holes for threadedly connecting fine-tuning screws are provided on the mounting block.

[0022] By adopting the above technical solution, the staff can further balance the eccentric moment of the blade by changing the number of fine-tuning screws, further reducing the deflection amplitude of the journal, which is beneficial to improving the machining accuracy of the journal surface.

[0023] Optionally, a positioning center point for abutting against the center hole of the end wall of the journal is fixed on the side wall of the base facing the fixed cylinder, and the positioning center point is coaxially arranged with the fixed cylinder.

[0024] By adopting the above technical solution, after the positioning center point abuts against the positioning hole of the end wall of the journal, the deflection amplitude of the journal end is further reduced, which is beneficial to further improving the machining accuracy of the journal surface.

[0025] Optionally, a pair of limiting plates for clamping the blade are detachably fixed on the fixed cylinder.

[0026] By adopting the above technical solution, the limiting plates reduce the possibility of relative rotation between the blade and the fixed cylinder when the three-jaw chuck rotates, which is beneficial to further improving the machining accuracy of the journal surface.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] After the journal at one end of the blade is machined, the fixed cylinder is removed from the connecting cylinder, and then the other end of the fixed cylinder is clamped to the connecting cylinder. Since the positions of the blade and the counterweight on the fixed cylinder have not changed relative to the fixed cylinder, there is no need to replace the adapted counterweight again, reducing the operation steps for machining the journals of the same blade, facilitating the staff to perform double-journal machining of the blade, and being beneficial to improving the efficiency of double-journal machining;

[0029] When disassembling the fixed cylinder, the staff simultaneously press the two sliding rods. The sliding rods push the first magnet, and the first magnet pushes the clamping block through the second magnet, causing the clamping block to disengage from the clamping groove. Then, pull the fixed cylinder away from the connecting cylinder to make the insertion strip and the clamping block disengage from the insertion hole, completing the disassembly of the fixed cylinder. Compared with overcoming the attraction of the first magnet to the second magnet to push the insertion strip, the operation is more labor-saving, facilitating the staff to remove the fixed cylinder from the connecting cylinder, facilitating the staff to perform the double journal processing of the blade, and being beneficial to improving the efficiency of processing the double journal;

[0030] Rotate the adjusting block. Since the first screw is fixed on the counterweight, the first screw pushes the adjusting block to move towards or away from the counterweight, realizing the change of the distance between the adjusting block and the counterweight, and further adjusting the distance between the adjusting block and the fixed cylinder. The staff can place several adjusting pieces on the first screw to further increase the overall counterweight of the counterweight, thereby increasing the adjustment range of the eccentric moment generated by the counterweight, being beneficial to adapting to blades with a larger eccentric moment, eliminating the need for the staff to repeatedly replace the counterweight for adjustment, facilitating the staff to balance the eccentric moment of the blade, and being beneficial to improving the efficiency of processing the journal of the blade. Brief Description of the Drawings

[0031] Figure 1 is a schematic structural diagram of the weight balancing tooling in Embodiment 1 for showing the structure.

[0032] Figure 2 is a schematic structural diagram of the mounting block, positioning center point, and counterweight in Embodiment 1 for showing the structure.

[0033] Figure 3 is a schematic structural diagram of the weight balancing tooling in Embodiment 2 for showing the structure.

[0034] Figure 4 is a schematic structural diagram of the relief groove in Embodiment 2 for showing the structure.

[0035] Figure 5 is Figure 4 an enlarged view of part A in

[0036] Figure 6 is a schematic structural diagram of the adjusting block, adjusting piece, first screw, second screw, mounting block, and counterweight in Embodiment 2 for showing the structure.

[0037] Explanation of the reference numerals: 1. base; 11. connecting tube; 111. jack; 112. snap-fit ​​groove; 113. sliding hole; 1131. sliding rod; 1132. magnetic block 1; 1133. spring; 1134. stopper; 12. positioning top; 2. fixing tube; 21. inserting strip; 211. snap-fit ​​block; 2111. magnetic block 2; 22. locking nail; 23. reinforcing strip; 231. marking line; 232. clearance groove; 24. limiting plate; 241. mounting block; 2411. mounting nail; 242. limiting nail; 243. fixing nail; 25. clearance hole; 3. counterweight block; 31. adjusting block; 32. screw 1; 33. abutment plate; 331. sliding plate; 34. screw 2; 35. adjusting sheet; 4. blade; 41. journal. DETAILED DESCRIPTION

[0038] The following is combined with Figures 1-6 This application is described in further detail.

[0039] Embodiment 1:

[0040] The embodiment of the present application discloses a counterweight tool for machining double-journal eccentric blades.

[0041] Reference Figure 1 A counterweight tooling for processing double-journal eccentric blades includes a base 1 for clamping by a three-jaw chuck, a fixed cylinder 2 for inserting the shaft neck 41 of the blade 4 is provided on the base 1, a clearance hole 25 for the blade 4 to extend into is opened on the side wall of the fixed cylinder 2, a mounting block 241 is provided on the fixed cylinder 2, and the mounting block 241 is detachably connected to a counterweight block 3, and the counterweight block 3 is located on the side of the fixed cylinder 2 away from the clearance hole 25.

[0042] Reference Figure 2 A positioning top 12 is fixed to the top wall of the base 1. The positioning top 12 is coaxially arranged with the fixing cylinder 2. The top of the positioning top 12 abuts against the center hole at the bottom of the journal 41. After the positioning top 12 abuts against the positioning hole of the end wall of the journal 41, the deflection amplitude of the end of the journal 41 is reduced, which is conducive to further improving the machining accuracy of the surface of the journal 41.

[0043] Reference Figure 2The top wall of the mounting block 241 is provided with a plurality of fine-tuning holes for threading fine-tuning screws. The plurality of fine-tuning holes are sequentially arranged along the length direction of the mounting block 241. The staff can further balance the eccentric moment of the blade 4 by changing the number of fine-tuning screws, further reduce the amplitude of the deflection of the journal 41, and help improve the machining accuracy of the surface of the journal 41. A mounting nail 2411 is inserted into one of the fine-tuning holes. The bottom end of the mounting nail 2411 extends out of the bottom end of the fine-tuning hole and is threadedly connected to the top wall of the counterweight 3. The top wall of the counterweight 3 is pressed against the bottom wall of the mounting block 241, increasing the resistance that the counterweight 3 needs to overcome when rotating relative to the mounting block 241. The staff can adjust the distance between the counterweight 3 and the fixed tube 2 by changing the position of the mounting nail 2411.

[0044] Reference Figure 2 A pair of limit plates 24 for limiting the rotation of the blade 4 relative to the fixed cylinder 2 are detachably fixed on the top of the fixed cylinder 2. In the embodiment of the present application, the limit plate 24 is integrally formed with the mounting block 241, and a fixing nail 243 is provided on the limit plate 24, and the fixing nail 243 is threadedly connected to the limit plate 24 in the horizontal direction and is threadedly connected to the side wall of the fixed cylinder 2. A limit nail 242 is provided on the limit plate 24, and the limit nail 242 is threadedly connected to the limit plate 24 in the horizontal direction and abuts against the blade 4.

[0045] Reinforcement strips 23 are provided on opposite sides of the fixed cylinder 2. The reinforcement strips 23 are vertically arranged, and the bottom ends of the reinforcement strips 23 are welded to the base 1. The two reinforcement strips 23 are symmetrically arranged about the axis of the fixed cylinder 2. Two locking pins 22 are provided on the reinforcement strip 23. The two locking pins 22 are symmetrical about the axis of the fixed cylinder 2, and the axes of the locking pins 22 intersect with the axis of the fixed cylinder 2. Two limiting pins 242 are symmetrical about the axis of the fixed cylinder 2, and the axes of the limiting pins 242 intersect with the axis of the fixed cylinder 2. The eccentric moments generated by the two limiting pins 242 are balanced, reducing the influence of the eccentric moments generated by the two limiting pins 242 on the processing journal 41. A marking line 231 is provided on the side wall of the reinforcement strip 23 away from the fixed cylinder 2. The marking line 231 is parallel to the axis of the fixed cylinder 2, and the marking line 231 is located above the limiting pin 242.

[0046] The staff can lift the two locking pins 22 to the same height. Under the action of gravity, the fixed cylinder 2 deflects downward. When the center of gravity of the whole formed by the fixed cylinder 2, the blades 4 and the counterweight block 3 is located on the axis of the fixed cylinder 2, the fixed cylinder 2 falls to a vertical state. The staff can determine whether the marking line 231 is vertical by setting a reference object, and then determine whether the center of gravity of the whole formed by the fixed cylinder 2, the blades 4 and the counterweight block 3 is located on the axis of the fixed cylinder 2. This is convenient for the staff to quickly determine whether the torque on the fixed cylinder 2 is balanced, which is beneficial to improving the efficiency of the shaft neck 41 processing.

[0047] The implementation principle of Example 1 is as follows: when processing the journal 41, first insert the journal 41 of the blade 4 into the fixed cylinder 2, and make the blade 4 extend into the clearance hole 25, then install the counterweight 3, and then clamp the base 1 with the three-jaw chuck of the CNC machine tool to process the journal 41. After the journal 41 at one end of the blade 4 is processed, the blade 4 is taken out of the fixed cylinder 2 and inserted into the fixed cylinder 2 in reverse, and then the adapted counterweight 3 is reinstalled, and then the base 1 is clamped with the three-jaw chuck to process the journal 41 at the other end. Since the counterweight 3 is located on the side of the fixed cylinder 2 away from the clearance hole 25, when the three-jaw chuck rotates, the eccentric torque generated by the counterweight 3 can balance the eccentric torque generated by the blade 4, thereby reducing the deflection amplitude of the journal 41 of the blade 4 when the three-jaw chuck rotates, improving the processing accuracy of the surface of the journal 41, and improving the coaxiality of the double journals 41, thereby reducing the unqualified rate of the product.

[0048] Embodiment 2:

[0049] Reference Figure 3 and Figure 4 The difference between this embodiment and the embodiment 1 is that a connecting tube 11 for the end of the fixing tube 2 to be connected by clamping is fixed on the top wall of the base 1. After the processing of the journal 41 at one end of the blade 4 is completed, the fixing tube 2 is removed from the connecting tube 11, and then the other end of the fixing tube 2 is clamped to the connecting tube 11. Since the positions of the blade 4 and the counterweight block 3 on the fixing tube 2 are not changed relative to the fixing tube 2, there is no need to replace the matching counterweight block 3, which reduces the operation steps of processing the journal 41 of the same blade 4, facilitates the staff to process the double journals 41 of the blade 4, and is conducive to improving the efficiency of processing the double journals 41.

[0050] Reference Figure 4 and Figure 5 A pair of inserting strips 21 are disposed opposite to each other at the ends of the fixed cylinder 2. Two inserting holes 111 are provided on the side wall of the connecting cylinder 11 away from the base 1 for inserting the inserting strips 21. The inserting holes 111 correspond to the inserting strips 21 one by one. The inserting strips 21 are slidably connected to the fixed cylinder 2, and the sliding direction of the inserting strips 21 is perpendicular to the axial direction of the fixed cylinder 2. A clamping groove 112 is provided on the hole wall of the inserting hole 111. A clamping block 211 for sliding into the clamping groove 112 is fixed at one end of the inserting strip 21 away from the fixed cylinder 2. A magnetic block 1132 is disposed at the bottom of the clamping groove 112. A magnetic block 2111 is fixed on the side wall of the clamping block 211 away from the inserting strip 21. The magnetic block 1132 and the magnetic block 2111 are oppositely polarized.

[0051] Reference Figure 4 and Figure 5The bottom end of the reinforcing strip 23 is provided with a clearance groove 232, and the outer wall of the connecting tube 11 is provided with a sliding hole 113. A sliding rod 1131 is slidably penetrated in the sliding hole 113, and the sliding rod 1131 is arranged horizontally. One end of the sliding rod 1131 passes through the bottom of the sliding hole 113 and extends into the clamping groove 112, and the other end extends out of the opening of the sliding hole 113 and extends into the clearance groove 232. The end of the sliding rod 1131 extending into the clamping groove 112 is connected to the magnetic block 1132, and the end of the sliding rod 1131 extending out of the opening of the sliding hole 113 is fixed with a stopper 1134, and a spring 1133 is connected between the stopper 1134 and the outer wall of the connecting tube 11, and the spring 1133 is sleeved on the sliding rod 1131.

[0052] After one end of the blade 4 is processed, the staff presses the two sliding bars 1131 at the same time, and the sliding bar 1131 pushes the magnetic block 1132. The magnetic block 1132 pushes the clamping block 211 through the magnetic block 2111, so that the clamping block 211 is disengaged from the clamping groove 112. Then, the fixed cylinder 2 is pulled away from the connecting cylinder 11 to move, so that the insertion strip 21 and the clamping block 211 are disengaged from the socket 111, and the disassembly of the fixed cylinder 2 is completed. Then, the fixed cylinder 2 is turned over so that the other end of the blade 4 faces the connecting cylinder 11, and then the insertion strip 21 is plugged into the socket 111. Since the magnetic block 1132 and the magnetic block 2111 attract each other, the clamping block 211 automatically clamps the clamping groove 112, and the inverted fixed cylinder 2 is completed. There is no need to replace the matching counterweight block 3, which reduces the operating steps of processing the shaft neck 41 of the same blade 4, making it convenient for the staff to process the double shaft neck 41 of the blade 4, which is beneficial to improving the efficiency of processing the double shaft neck 41.

[0053] Reference Figure 3 and Figure 6 The side of the counterweight block 3 facing away from the fixed tube 2 is provided with an adjustment block 31, and an adjustment member is connected between the counterweight block 3 and the adjustment block 31. The adjustment member is configured as a screw rod 32 for bridging the adjustment sheet 35, one end of the screw rod 32 is fixed to the side wall of the counterweight block 3 facing the adjustment block 31, and the other end is threadedly connected to the adjustment block 31.

[0054] Rotate the adjusting block 31. Since the screw 32 is fixed on the counterweight block 3, the distance between the adjusting block 31 and the fixed cylinder 2 is adjusted, thereby changing the size of the eccentric torque generated by the adjusting block 31 when the three-jaw chuck rotates, so as to enhance the balancing effect of the eccentric torque of the blade 4, which is beneficial to further reduce the deflection amplitude of the journal 41 of the blade 4, further improve the machining accuracy of the surface of the journal 41, and further reduce the unqualified rate of the product.

[0055] Reference Figure 3 and Figure 6The counterweight block 3 is provided with a support plate 33 slidingly disposed on one side of the adjusting block 31, and a pair of sliding plates 331 are integrally formed on the side wall of the support plate 33 facing the counterweight block 3, and the sliding plates 331 slide and penetrate the counterweight block 3 in a horizontal direction. The counterweight block 3 is provided with a screw rod 34 rotatingly disposed on the side wall of the support plate 33, and one end of the screw rod 34 facing away from the counterweight block 3 is threadedly connected to the support plate 33, and the axis of the screw rod 34 is arranged horizontally.

[0056] The staff can place a number of adjustment plates 35 on the screw 32 to further increase the overall counterweight of the counterweight 3, thereby increasing the adjustment range of the eccentric torque generated by the counterweight 3, which is conducive to adapting to the blade 4 with a larger eccentric torque. The staff does not need to repeatedly replace the counterweight 3 for adjustment, which makes it easier for the staff to balance the eccentric torque of the blade 4, which is conducive to improving the efficiency of processing the shaft neck 41 of the blade 4.

[0057] The bottom wall of the adjusting piece 35 is provided with a lap groove for the screw rod 1 32 to extend into. By rotating the screw rod 2 34, since the sliding plate 331 slides in the horizontal direction and penetrates the counterweight block 3, the screw rod 2 34 can push the abutment plate 33 to slide toward or away from the counterweight block 3, and the abutment plate 33 is pressed against the top wall of the adjusting piece 35, so that the screw rod 1 32 and the abutment plate 33 clamp the adjusting piece 35 and form a rotation limiting effect on the adjusting piece 35. By rotating the adjusting block 31, the adjusting block 31 is pressed against the adjusting piece 35, forming a movement limiting effect on the adjusting piece 35, reducing the possibility of the adjusting piece 35 moving or rotating when the three-jaw chuck is rotated, which is beneficial to improving the machining accuracy of the surface of the journal 41.

[0058] The implementation principle of the second embodiment is as follows: when the eccentric moment of the blade 4 needs to be balanced, the staff can lift the two locking pins 22 to the same height. Under the action of gravity, the fixed cylinder 2 deflects downward, and then the staff can put the adjustment pieces 35 one by one. When the fixed cylinder 2 is close to the vertical state, the adjustment block 31 is rotated to abut against the adjustment piece 35, and the second screw 34 is rotated to make the abutment plate 33 and the sliding plate 331 abut against the top wall of all the adjustment pieces 35 to complete the initial adjustment, and then the number of fine-tuning screws is increased on the mounting block 241 for fine-tuning until the marking line 231 is vertical, and the secondary adjustment is completed to achieve the eccentric moment of the blade 4 balanced, which is beneficial to improve the machining accuracy of the surface of the journal 41;

[0059] After one end of the blade 4 is processed, the staff simultaneously presses the two sliding rods 1131. The sliding rods 1131 push the first magnet 1132, and the first magnet 1132 pushes the clamping block 211 through the second magnet 2111, so that the clamping block 211 disengages from the clamping groove 112. Then, the fixed cylinder 2 is pulled away from the connecting cylinder 11, so that the insertion strip 21 and the clamping block 211 disengage from the insertion hole 111, and the disassembly of the fixed cylinder 2 is completed. Then, the fixed cylinder 2 is flipped so that the other end of the blade 4 faces the connecting cylinder 11. Then, the insertion strip 21 is inserted into the insertion hole 111. Since the first magnet 1132 and the second magnet 2111 attract each other, the clamping block 211 automatically clamps into the clamping groove 112, and the reverse installation of the fixed cylinder 2 is completed without replacing the adapted counterweight 3 again.

[0060] The embodiments of the specific implementation manners are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A counterweight tool for machining double-journal eccentric blades, Features: The invention comprises a base (1) for clamping by a three-jaw chuck, the base (1) being provided with a fixing cylinder (2) for inserting a shaft neck (41) of a blade (4), the side wall of the fixing cylinder (2) being provided with a clearance hole (25) for inserting the blade (4), the fixing cylinder (2) being provided with a mounting block (241), the mounting block (241) being detachably connected with a counterweight block (3), the counterweight block (3) being located on a side of the fixing cylinder (2) away from the clearance hole (25); A connecting tube (11) for clamping and connecting the end of the fixing tube (2) is fixed on the base (1); A pair of inserting strips (21) are arranged opposite to each other at the ends of the fixed cylinder (2), and the inserting strips (21) are slidably connected to the fixed cylinder (2). The side wall of the connecting cylinder (11) facing away from the base (1) is provided with two inserting holes (111) for inserting the inserting strips (21). A clamping block (211) is fixed to one end of the inserting strip (21) facing away from the fixed cylinder (2). A clamping groove (112) is arranged on the hole wall of the inserting hole (111) for sliding the clamping block (211). A magnetic block 1 (1132) is arranged at the bottom of the clamping groove (112), and a magnetic block 2 (2111) for attracting the magnetic block 1 (1132) is arranged on the clamping block (211).

2. A counterweight tool for machining double-journal eccentric blades according to claim 1, Features: A sliding hole (113) is provided on the outer wall of the connecting tube (11), and a sliding rod (1131) is slidably inserted into the sliding hole (113). One end of the sliding rod (1131) passes through the bottom of the sliding hole (113) and extends into the snap-fit ​​groove (112), while the other end extends out of the opening of the sliding hole (113). The end of the sliding rod (1131) extending into the snap-fit ​​groove (112) is connected to the magnetic block 1 (1132), and a spring (1133) is connected between the end of the sliding rod (1131) extending out of the opening of the sliding hole (113) and the outer wall of the connecting tube (11).

3. A counterweight tool for machining double-journal eccentric blades according to claim 1, Features: An adjustment block (31) is provided on the side of the counterweight block (3) facing away from the fixed cylinder (2), and an adjustment member for adjusting the distance between the adjustment block (31) and the fixed cylinder (2) is connected between the counterweight block (3) and the adjustment block (31).

4. A counterweight tool for machining double-journal eccentric blades according to claim 3, Features: The adjusting member is configured as a screw rod (32) for accommodating an adjusting plate (35); the screw rod (32) is fixed to a side wall of the counterweight block (3) facing the adjusting block (31); the screw rod (32) is threadedly connected to the adjusting block (31); a support plate (33) for pressing the adjusting plate (35) against the screw rod (32) is slidably provided on the counterweight block (3); a screw rod (34) is rotatably provided on the counterweight block (3); an end of the screw rod (34) facing away from the counterweight block (3) is threadedly connected to the support plate (33).

5. The counterweight tool for machining double-journal eccentric blades according to claim 1, Features: Two locking pins (22) are arranged on the fixing cylinder (2), the two locking pins (22) are symmetrical about the axis of the fixing cylinder (2), and the axes of the locking pins (22) intersect with the axis of the fixing cylinder (2).

6. A counterweight tool for machining double-journal eccentric blades according to claim 1, Features: The mounting block (241) is provided with a plurality of fine-tuning holes for threadedly connecting fine-tuning screws.

7. The counterweight tool for machining double-journal eccentric blades according to claim 1, Features: A positioning tip (12) for abutting against a central hole of an end wall of a journal (41) is fixed to the side wall of the base (1) facing the fixed cylinder (2), and the positioning tip (12) is coaxially arranged with the fixed cylinder (2).

8. The counterweight tool for machining double-journal eccentric blades according to claim 1, Features: A pair of limiting plates (24) for clamping the blades (4) are detachably fixed on the fixing cylinder (2).

Images