CN116852113A - Hydraulic pump return disc blank bending system and process - Google Patents
Hydraulic pump return disc blank bending system and process Download PDFInfo
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- CN116852113A CN116852113A CN202310532421.8A CN202310532421A CN116852113A CN 116852113 A CN116852113 A CN 116852113A CN 202310532421 A CN202310532421 A CN 202310532421A CN 116852113 A CN116852113 A CN 116852113A
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- 238000005452 bending Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005498 polishing Methods 0.000 claims abstract description 36
- 238000004080 punching Methods 0.000 claims abstract description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 81
- 239000010720 hydraulic oil Substances 0.000 claims description 40
- 238000003825 pressing Methods 0.000 claims description 37
- 238000007789 sealing Methods 0.000 claims description 23
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 239000004745 nonwoven fabric Substances 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 7
- 238000004381 surface treatment Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 4
- 238000003698 laser cutting Methods 0.000 claims description 4
- 239000002923 metal particle Substances 0.000 abstract description 15
- 238000005336 cracking Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention relates to the technical field of return disc processing and production, in particular to a hydraulic pump return disc blank bending system and a hydraulic pump return disc blank bending process; comprises the following steps of; s1: firstly, punching a disc blank with the required concentric circles through a punching machine; according to the invention, the planing tool and the sander are arranged on the turntable, so that the planing and polishing of the lower end of the blank of the return tray are completed before the lower die descends, so that workers are not required to transport the blank of the return tray between a plurality of machines in a reciprocating manner, the labor intensity of the workers is reduced, the labor efficiency of the workers is improved, the blank of the return tray after planing is ensured to be directly polished and bent, metal particles are prevented from entering the planing groove due to the transportation and other reasons, the metal particles are prevented from increasing the local pressure of the folded edge during bending, the surface of a workpiece is prevented from being worn, the cracking of the bent part of the blank of the return tray is further avoided, and the forming quality of the blank of the return tray is improved.
Description
Technical Field
The invention relates to the technical field of return disc processing and production, in particular to a hydraulic pump return disc blank bending system and a hydraulic pump return disc blank bending process.
Background
The hydraulic pump is a power element of a hydraulic system, and is an element driven by an engine or a motor, and is used for sucking oil from a hydraulic oil tank to form pressure oil to be discharged and sent to an executing element; the hydraulic pump is structurally divided into a gear pump, a plunger pump, a vane pump and a screw pump; and the return disc is a disc-shaped important element in the axial plunger pump;
the existing return disc is manufactured by stamping a metal plate; obtaining a concentric circle disc blank with a required size, carrying out surface treatment on the disc blank, and processing a curved planing groove on the section of the disc blank; grinding the bent gouged groove to remove burrs on the gouged surface, and placing the disc blank provided with the gouged groove into a bending machine to bend the disc blank along the gouged groove direction; then carrying out heat treatment on the bent disc blank to eliminate the stress of the disc blank, and then cutting a round hole with a required size from the disc blank subjected to heat treatment by a laser cutting technology to obtain a return disc blank; finally, carrying out surface treatment on the cut return disc blank to obtain a return disc finished product;
during the process of slotting, polishing and bending the return disc, workers are required to continuously transport the return disc blank between the machines, so that the labor intensity of the workers is increased, the production efficiency of the workers is reduced, and during the process of transporting the return disc blank in a large scale, metal particles on the surface of the return disc blank can fall into the slotting, so that when the return disc blank is bent, the metal particles in the slotting can increase the local pressure of a folded edge, the surface of a workpiece is worn, and the bending position of the return disc blank is cracked, so that the bending quality is affected;
in view of the above, the present invention provides a hydraulic pump return disc blank bending system and process, which solve the above technical problems.
Disclosure of Invention
In order to make up the defects of the prior art, the invention provides a hydraulic pump return disc blank bending system and a hydraulic pump return disc blank bending process, and the hydraulic pump return disc blank bending system and the hydraulic pump return disc blank bending process are characterized in that by arranging the rotary disc, a planing tool and a sander are arranged on the rotary disc, so that the lower end of a return disc blank is planed and polished before a lower die descends, workers are not required to transport the return disc blank between a plurality of machines, the labor intensity of the workers is reduced, the labor efficiency of the workers is improved, the blank of the return disc after planed is ensured to be directly polished and bent, metal particles are prevented from entering the planed due to transportation and the like, the metal particles are prevented from increasing the local pressure of a folded edge when being bent, the abrasion of the metal particles to the surface of a workpiece is prevented, the cracking of the return disc blank at the bending position is further avoided, and the forming quality of the return disc blank is improved.
The technical scheme adopted for solving the technical problems is as follows: the invention relates to a hydraulic pump return disc blank bending system and a hydraulic pump return disc blank bending process, wherein the hydraulic pump return disc blank bending system comprises the following steps:
s1: firstly punching a required concentric disc blank by a punching machine, then placing the concentric disc in a lower die of a bending machine, wherein the concentric disc and the lower die are positioned on the same central shaft, and controlling a hydraulic push rod to descend so that an upper die drives a pressing plate to be close to the lower die; at the moment, the pressing plate fixedly presses the disc at the upper end of the lower die under the action of self gravity;
s2: at the moment, the driving motor is controlled to run, so that the driving motor drives the swivel to rotate upwards in the circular groove, the planing tool ascends and contacts with the disc when the swivel drives the planing tool to rotate, the planing tool is used for planing the circular plate, and at the moment, the sander is used for polishing burrs on the planing surface;
s3: after polishing, the driving motor reversely rotates and drives the turntable to reset, at the moment, the hydraulic push rod contracts, so that the lower die drives the press roller to descend, the press roller enters the inner ring of the disc, and the press roller pushes the inner ring of the disc to bend downwards along the planing groove; finally, cutting a required round hole on the surface of the bent disc blank by utilizing a laser cutting technology, thereby obtaining a return disc blank, and finally, preparing the return disc blank into a required return disc through surface treatment;
wherein, the bending machine used in S1 includes:
the upper end of the machine body is fixedly connected with a hydraulic push rod; an upper die is fixedly connected to the upper end of the hydraulic push rod; a slide bar is fixedly connected to the lower end of the upper die; the surface of the sliding rod is connected with a pressing plate in a sliding manner; a compression roller is fixedly arranged at the lower end of the upper die; a clamping module is arranged between the pressing roller and the upper die; the clamping module is used for clamping the compression roller;
the lower die is provided with an installation opening at the upper end of the machine body; the lower die is connected in the mounting port in a sliding manner; the lower end of the machine body is provided with a round groove communicated with the mounting port; the circular groove is rotationally connected with a swivel; a spiral groove is formed in the inner wall of the circular groove; an annular groove communicated with the spiral groove is formed in one end, close to the mounting opening, of the circular groove; the swivel is rotationally connected with the machine body; the inner annular wall of the swivel is connected with a straight rod in a sliding manner; the lower end of the straight rod is fixedly connected with the output end of the driving motor; the driving motor is fixedly connected with the machine body; a planing tool and a sander are fixedly arranged at the upper end of the swivel; the planing tool and the sander are positioned at two sides of the straight rod.
Preferably, the clamping module comprises a clamping block; the lower end of the upper die is provided with a chute; the sliding block is connected in the sliding groove in a sliding way; the number of the clamping blocks is two; the two clamping blocks are rotationally connected through a screw rod; one side of the upper die is fixedly connected with a servo motor; one end of the screw rod is rotationally connected to the side wall of the chute, and the other end of the screw rod is fixedly connected with the output end of the servo motor.
Preferably, the upper end of the swivel is provided with two opposite L-shaped grooves; the planing tool and the sander are respectively and slidably connected in the two L-shaped grooves; a groove is formed in the inner wall of the swivel; the groove is communicated with the L-shaped groove through an air passage; a pressurizing block is connected in the groove in a sliding way; the surface of the straight rod is provided with a chute; the pressurizing block is connected in the chute in a sliding way; hydraulic oil is arranged in the groove; the rotating ring is internally provided with a voltage stabilizing module; the pressure stabilizing module is used for controlling the pressure of hydraulic oil in the L-shaped groove.
Preferably, the voltage stabilizing module comprises a voltage stabilizing groove; the pressure stabilizing groove is communicated with the L-shaped groove; one end, close to the L-shaped groove, of the pressure stabilizing groove is arranged in a horn shape; a rubber block is connected in a sliding and sealing manner in the pressure stabilizing groove; one end of the rubber block, which is far away from the L-shaped groove, is fixedly connected with the bottom of the pressure stabilizing groove through a compression spring; the bottom of the pressure stabilizing groove is communicated with the groove.
Preferably, the sander comprises a connecting rod and a sanding block; the connecting rod is connected in the L-shaped groove in a sliding way; the upper end of the connecting rod is provided with a connecting groove; the polishing blocks are fixedly connected in the connecting grooves through connecting springs.
Preferably, the pressure stabilizing groove is in sliding sealing connection with a sealing plate; the surface of the connecting rod is provided with air holes; the air hole is communicated with the connecting groove; the connecting groove is communicated with the pressure stabilizing groove through an air pipe; the sealing plate is fixedly connected with the upper end wall of the pressure stabilizing groove through a reset spring; a closing unit is arranged in the air hole; the closing unit is used for controlling closing of the air holes; one end of the compression spring, which is far away from the rubber block, is fixedly connected with the sealing plate.
Preferably, the closing unit comprises a U-shaped groove; the U-shaped groove is formed in the inner wall of the connecting groove; the surface of the air pipe is provided with an air inlet; and a one-way valve is arranged in the air inlet.
Preferably, the diameter of one end, far away from the connecting groove, of the two ends of the air hole is smaller; one end of the air hole, which is far away from the connecting groove, is fixedly connected with a non-woven fabric.
The beneficial effects of the invention are as follows:
1. according to the invention, the planing tool and the sander are arranged on the turntable, so that the planing and polishing of the lower end of the blank of the return tray are completed before the lower die descends, so that workers are not required to transport the blank of the return tray between a plurality of machines in a reciprocating manner, the labor intensity of the workers is reduced, the labor efficiency of the workers is improved, the blank of the return tray after planing is ensured to be directly polished and bent, metal particles are prevented from entering the planing groove due to the transportation and other reasons, the metal particles are prevented from increasing the local pressure of the folded edge during bending, the surface of a workpiece is prevented from being worn, the cracking of the bent part of the blank of the return tray is further avoided, and the forming quality of the blank of the return tray is improved.
2. According to the invention, through the arrangement of the pressure stabilizing groove, the pressure stabilizing groove can be used for relieving the pressure of hydraulic oil in the L-shaped groove, so that when the planing tool changes the planing diameter of the lower end of the blank of the return disc, a user only needs to replace the lower dies with different diameters, and when the planing tool enters the inner rings of the lower dies with different diameters, the friction between the planing tool and the inner ring wall is not increased due to the small diameter of the inner ring, the normal service life of the planing tool is prolonged, and the practical application range of the planing tool is improved.
Drawings
The invention will be further described with reference to the drawings and embodiments.
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a perspective view of the present invention;
FIG. 3 is a schematic diagram of the structure of the present invention;
fig. 4 is an enlarged view at a in fig. 3;
fig. 5 is an enlarged view at B in fig. 3;
FIG. 6 is an enlarged view at C in FIG. 3;
FIG. 7 is a perspective view of a swivel used in the present invention;
in the figure: 1. a body; 11. a hydraulic push rod; 12. an upper die; 121. a slide bar; 122. a pressing plate; 13. a press roller; 131. clamping blocks; 132. a chute; 133. a servo motor; 134. a screw; 14. a lower die; 15. a mounting port; 16. a circular groove; 161. a spiral groove; 162. an annular groove; 17. a driving motor; 2. a swivel; 21. a straight rod; 211. a chute; 22. a planing tool; 23. a sander; 231. a connecting rod; 232. polishing the block; 233. a connecting groove; 234. a connecting spring; 235. air holes; 24. an L-shaped groove; 25. a groove; 251. an airway; 252. pressurizing the block; 26. a voltage stabilizing groove; 261. a rubber block; 262. a compression spring; 263. a sealing plate; 264. a return spring; 27. a U-shaped groove; 28. an air pipe; 281. an air inlet; 282. a one-way valve; 29. a nonwoven fabric.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 7, the hydraulic pump return disc blank bending system and process provided by the invention comprise the following steps:
s1: firstly, punching a required concentric disc blank by a punching machine, then placing the concentric disc in a lower die 1414 of a bending machine, wherein the concentric disc and the lower die 1414 are positioned on the same central shaft, and controlling a hydraulic push rod 1111 to descend so that an upper die 1212 drives a pressing plate 122122 to be close to the lower die 1414; at this time, the pressing plate 122122 fixedly presses the disc on the upper end of the lower die 1414 under the action of self gravity;
s2: at this time, the driving motor 1717 is controlled to operate, so that the driving motor 1717 drives the swivel 22 to rotate upwards in the circular groove 1616, so that the swivel 22 drives the planing tool 2222 to rotate, and meanwhile, the planing tool 2222 ascends and contacts with the circular disc, so that the planing tool 2222 performs planing on the circular disc, and at this time, the sander 2323 polishes burrs on the planing surface;
s3: after polishing, the driving motor 1717 reversely rotates and drives the turntable to reset, at the moment, the hydraulic push rod 1111 contracts, so that the lower die 1414 drives the compression roller 1313 to descend, the compression roller 1313 enters the inner ring of the disc, and the compression roller 1313 pushes the inner ring of the disc to bend downwards along the planing groove; finally, cutting a required round hole on the surface of the bent disc blank by utilizing a laser cutting technology, thereby obtaining a return disc blank, and finally, preparing the return disc blank into a required return disc through surface treatment;
wherein, the bending machine used in S1 includes:
the device comprises a machine body 1, wherein a hydraulic push rod 11 is fixedly connected to the upper end of the machine body 1; the upper end of the hydraulic push rod 11 is fixedly connected with an upper die 12; a sliding rod 121 is fixedly connected to the lower end of the upper die 12; the surface of the sliding rod 121 is connected with a pressing plate 122 in a sliding manner; a press roller 13 is fixedly arranged at the lower end of the upper die 12; a clamping module is arranged between the pressing roller 13 and the upper die 12; the clamping module is used for clamping the press roller 13;
the lower die 14 is provided with a mounting port 15 at the upper end of the machine body 1; the lower die 14 is slidably connected in the mounting port 15; the lower end of the machine body 1 is provided with a circular groove 16 communicated with the mounting opening 15; the rotary ring 2 is rotationally connected with the circular groove 16; a spiral groove 161 is formed in the inner wall of the circular groove 16; an annular groove 162 communicated with the spiral groove 161 is formed at one end of the circular groove 16 close to the mounting opening 15; the swivel 2 is rotatably connected with the machine body 1; the inner annular wall of the swivel 2 is connected with a straight rod 21 in a sliding manner; the lower end of the straight rod 21 is fixedly connected to the output end of the driving motor 17; the driving motor 17 is fixedly connected with the machine body 1; a planing tool 22 and a sander 23 are fixedly arranged at the upper end of the swivel 2; the planing tool 22 and the sander 23 are located on both sides of the straight bar 21.
As an embodiment of the present invention, the clamping module includes a clamping block 131; a chute 132 is formed at the lower end of the upper die 12; the sliding block is connected in the sliding groove 132 in a sliding way; the number of the clamping blocks 131 is two; the two clamping blocks 131 are rotationally connected through a screw 134; a servo motor 133 is fixedly connected to one side of the upper die 12; one end of the screw 134 is rotatably connected to the side wall of the chute 132, and the other end is fixedly connected with the output end of the servo motor 133;
during the process of slotting, polishing and bending the return disc, workers are required to continuously transport the return disc blank between the machines, so that the labor intensity of the workers is increased, the production efficiency of the workers is reduced, and during the process of transporting the return disc blank in a large scale, metal particles on the surface of the return disc blank can fall into the slotting, so that when the return disc blank is bent, the metal particles in the slotting can increase the local pressure of a folded edge, the surface of a workpiece is worn, and the bending position of the return disc blank is cracked, so that the bending quality is influenced;
when in operation, a user firstly controls the servo motor 133 to drive the screw 134 to rotate, so that the two clamping blocks 131 are far away from each other under the drive of the screw 134, a worker places the press roller 13 matched with the lower die 14 between the two clamping blocks 131, controls the servo motor 133 to reversely rotate, so that the servo motor 133 can drive the screw 134 to reversely rotate, so that the two clamping blocks 131 are close to each other, the two clamping blocks 131 can clamp the press roller 13, and controls the hydraulic push rod 11 to push the upper die 12 to ascend, so that the upper die 12 drives the press plate 122 to ascend and be positioned above the lower die 14, and places the lower die 14 into the mounting port 15; since the lower die 14 is annular; the center of the lower die 14 is opposite to the axis of the upper die 12, a return disc blank is placed at the upper end of the upper die 12, and at the moment, the return disc blank and the lower die 14 are on the same central axis, and the hydraulic push rod 11 is controlled to descend so that the upper die 12 drives the pressing plate 122 to be close to the lower die 14; the pressing plate 122 fixedly presses the disc on the upper end of the lower die 14 under the action of self gravity; the driving motor 17 is controlled to operate, so that the driving motor 17 can drive the straight rod 21 to rotate, the straight rod 21 drives the rotating ring 2 to rotate, the rotating ring 2 rotates in the circular groove 16, the rotating ring 2 can spirally drive upwards along the spiral of the inner wall of the circular groove 16, the rotating ring 2 drives the planing tool 22 and the sander 23 to ascend, the planing tool 22 and the sander 23 enter the inner ring of the lower die 14, the planing tool 22 and the sander 23 slide upwards along the inner ring wall of the lower die 14, the planing tool 22 is contacted with the lower end surface of the blank of the return disc, the planing tool 22 can plane the lower end surface of the blank of the return disc while the rotating ring 2 rotates, the lower end surface of the blank of the return disc generates annular planing groove until the rotating ring 2 enters the annular groove 162, the sander 23 contacts with the port surface of the planing groove, the sander 23 can polish the port surface of the planing groove, when polishing is completed, the driving motor 17 is controlled to reversely rotate, so that the driving motor 17 drives the swivel 2 to enter the spiral groove 161 from the annular groove 162, the swivel 2 is driven downwards along the spiral groove 161, the swivel 2 drives the sander 23 and the planing tool 22 to enter the circular groove 16, the hydraulic push rod 11 is controlled to descend, the hydraulic push rod 11 drives the upper die 12 to approach the lower die 14, the slide rod 121 enters the machine body 1 under the driving of the upper die 12, the pressing plate 122 approaches the upper die 12, the pressing roller 13 positioned on the upper die 12 can penetrate the pressing plate 122 and contact with the blank of the return disc, the pressing roller 13 presses the blank of the return disc, the blank of the return disc can be bent downwards along the planing groove until the upper die 12 contacts with the lower die 14 through the pressing plate 122, the bending part of the blank of the return disc and the blank of the return disc are mutually perpendicular, then the hydraulic push rod 11 is controlled to stretch, the hydraulic push rod 11 can push the upper die 12 and the pressing plate 122 to separate, at the moment, the pressing plate 122 generates pressure on the blank of the return disc, so that the blank of the return disc is convenient to separate from the pressing roller 13, when the upper die 12 drives the pressing plate 122 to ascend through the slide rod 121, the pressing plate 122 is separated from the lower die 14, and a user takes down the blank of the return disc on the lower die 14;
according to the invention, the planing tool 22 and the sander 23 are arranged on the turntable through the arrangement of the turntable, so that the planing and polishing of the lower end of the blank of the return tray are completed before the lower die 14 descends, so that a worker is not required to transport the blank of the return tray between a plurality of machines in a reciprocating manner, the labor intensity of the worker is reduced, the labor efficiency of the worker is improved, the blank of the return tray after planing is ensured to be directly polished and bent, metal particles are prevented from entering the planing groove due to transportation and the like, the metal particles are prevented from increasing the local pressure of a folded edge during bending, the surface of a workpiece is prevented from being abraded, the cracking of the bent part of the blank of the return tray is further avoided, and the forming quality of the blank of the return tray is improved.
As an embodiment of the present invention, two opposite L-shaped grooves 24 are formed at the upper end of the swivel 2; the planing tool 22 and the sander 23 are respectively and slidably connected in two L-shaped grooves 24; a groove 25 is formed in the inner wall of the swivel 2; the groove 25 is communicated with the L-shaped groove 24 through an air passage 251; a pressurizing block 252 is slidably connected in the groove 25; the surface of the straight rod 21 is provided with a chute 211; the pressurizing block 252 is slidably connected in the chute 211; hydraulic oil is arranged in the groove 25; a voltage stabilizing module is arranged in the swivel 2; the pressure stabilizing module is used for controlling the pressure of hydraulic oil in the L-shaped groove 24.
As one embodiment of the present invention, the voltage stabilizing module includes a voltage stabilizing groove 26; the pressure stabilizing groove 26 is communicated with the L-shaped groove 24; one end of the pressure stabilizing groove 26, which is close to the L-shaped groove 24, is arranged in a horn shape; a rubber block 261 is connected in a sliding and sealing manner in the pressure stabilizing groove 26; one end of the rubber block 261, which is far away from the L-shaped groove 24, is fixedly connected with the bottom of the pressure stabilizing groove 26 through a compression spring 262; the bottom of the pressure stabilizing groove 26 is communicated with the groove 25;
when the rotary table is in operation, the pressure stabilizing groove 26 is positioned above the groove 25, when the rotary table 2 is driven by the driving motor 17 to rotate and ascend along the circular groove 16, the rotary table 2 can drive the pressurizing block 252 in the groove 25 to slide upwards along the chute 211 on the surface of the straight rod 21, when the planing tool 22 at the upper end is driven by the rotary table 2 to enter the mounting hole 15, the pressurizing block 252 in the groove 25 slides along the inclined plane of the chute 211, so that the pressurizing block 252 can be extruded by the inclined plane of the chute 211 to enter the groove 25, because the pressure stabilizing groove 26 is positioned above the groove 25, at the moment, a part of hydraulic oil can enter the pressure stabilizing groove 26 through the connecting port of the pressure stabilizing groove 26 and the groove 25, at the moment, the hydraulic oil in the pressure stabilizing groove 26 can generate thrust to the hydraulic oil in the groove 25 under the action of self gravity, so that the hydraulic oil in the groove 25 can not enter the pressure stabilizing groove 26, until the movable pressurizing block 252 blocks the connecting port between the pressure stabilizing groove 26 and the groove 25, hydraulic oil extruded by the pressurizing block 252 in the groove 25 can only enter the L-shaped groove 24 through the air passage 251, so that the planer tool 22 in the L-shaped groove 24 is pushed by the hydraulic oil to move away from the straight rod 21 until the planer tool 22 contacts with the inner annular wall of the lower die 14, at the moment, the hydraulic oil continues to be conveyed into the L-shaped groove 24, but the planer tool 22 cannot continue to move due to the blocking of the inner annular wall of the lower die 14 by the planer tool 22, at the moment, the pressure of the hydraulic oil in the L-shaped groove 24 is increased until the pressure of the hydraulic oil is increased, and the rubber block 261 is pushed by the pressure of the hydraulic oil to extrude the compression spring 262 into the pressure stabilizing groove 26, so that abrasion between the planer tool 22 and the lower die 14 due to overlarge friction force between the planer tool 22 and the lower die 14 is avoided, and the service lives of the planer tool 22 and the lower die 14 are prolonged; when the driving motor 17 reversely rotates, the rotary ring 2 rotates and descends, the pressurizing block 252 slides downwards along the chute 211, at the moment, the pressurizing block 252 is reset under the pulling of the chute wall of the chute 211, so that the hydraulic oil pressure in the groove 25 and the L-shaped groove 24 is reduced to a negative pressure state, at the moment, the planing tool 22 and the sander 23 are continuously close to the straight rod 21 under the adsorption of negative pressure until the pressurizing block 252 passes over a connecting port of the pressure stabilizing groove 26 and the groove 25, and at the moment, the hydraulic oil in the pressure stabilizer flows out;
according to the invention, through the arrangement of the pressure stabilizing groove 26, the pressure stabilizing groove 26 can be used for relieving the pressure of hydraulic oil in the L-shaped groove 24, so that when the planing tool 22 changes the planing diameter of the lower end of the blank of the return disc, a user only needs to replace the lower die 14 with different diameters, and when the planing tool 22 enters the inner rings of the lower die 14 with different diameters, the friction between the planing tool 22 and the inner ring wall is not increased due to the small diameter of the inner ring, the normal service life of the planing tool 22 is prolonged, and the practical application range of the invention is improved.
As an embodiment of the present invention, the sander 23 includes a connection bar 231 and a sanding block 232; the connecting rod 231 is slidably connected in the L-shaped groove 24; the upper end of the connecting rod 231 is provided with a connecting groove 233; the sanding block 232 is fixedly connected in the connecting groove 233 by a connecting spring 234.
As an embodiment of the present invention, a sealing plate 263 is slidably and sealingly connected to the pressure stabilizing groove 26; the surface of the connecting rod 231 is provided with an air hole 235; the air holes 235 are communicated with the connecting grooves 233; the connecting groove 233 is communicated with the pressure stabilizing groove 26 through an air pipe 28; the sealing plate 263 is fixedly connected with the upper end wall of the pressure stabilizing groove 26 through a return spring 264; a closing unit is arranged in the air hole 235; the closing unit is used for controlling the closing of the air holes 235; one end of the compression spring 262 far away from the rubber block 261 is fixedly connected with the sealing plate 263;
during operation, in an initial state, the return spring 264 pushes the sealing plate 263 to the bottom of the pressure stabilizing groove 26, and at this time, the sealing plate 263 blocks the connection port between the pressure stabilizing groove 26 and the groove 25, so that hydraulic oil is prevented from being pushed by the pressurizing block 252 to enter the pressure stabilizing groove 26 along the connection port between the pressure stabilizing groove 26 and the groove 25; when the planing tool 22 contacts with the inner annular wall of the lower die 14, the pressure of hydraulic oil is increased, so that the hydraulic oil pushes the rubber plug to enter the stabilizing groove 26, at this time, the hydraulic oil is located between the sealing plate 263 and the stabilizing groove 26, so that the sealing plate 263 pushes hydraulic oil to extrude the reset spring 264 to move towards the upper end face of the stabilizing groove 26, gas in the stabilizing groove 26 enters the connecting groove 233 through the air pipe 28, at this time, a closing unit in the air hole 235 is in a closed state, so that the gas entering the connecting groove 233 cannot be sprayed out through the air hole 235 until the swivel 2 enters the annular groove 162, at this time, the swivel 2 drives the polishing block 232 to be in contact with the lower end face of the return disc blank, so that the polishing block 232 is pushed by the blocking force of the lower end face of the blank to enter the connecting groove 233, at this time, so that the polishing block 232 extrudes the connecting spring 234 to enter the connecting groove 233, at this time, the connecting spring 234 pushes the polishing block 232 to polish the planing groove at the lower end of the return disc blank under the effect of self-restoring force, so that burrs in the planing groove are polished, at this time, the air hole 235 is in the closing unit is in a closed state, so that the gas entering the connecting groove 233 can not be sprayed out through the air hole 235, until the swivel ring 2 enters the annular groove 162, at this time, the air hole is actually, the air hole is blown off, the air hole is improved, and the air hole is effectively, and the air-cleaning effect is further, and the inner wall is prevented from the blowing the inner wall of the planing groove, and the air is further, and the air is improved.
As an embodiment of the invention, the closing unit comprises a U-shaped groove 27; the U-shaped groove 27 is formed on the inner wall of the connecting groove 233; an air inlet 281 is formed in the surface of the air pipe 28; a check valve 282 is installed in the air inlet 281.
As an embodiment of the present invention, the diameter of one end of the air hole 235, which is far from the connection groove 233, is smaller; one end of the air hole 235, which is far away from the connecting groove 233, is fixedly connected with a non-woven fabric 29;
when the air in the pressure stabilizing groove 26 enters the connecting groove 233 through the air pipe 28 in operation, the grinding block 232 is close to the notch of the connecting groove 233 under the pushing of the connecting spring 234, the grinding block 232 blocks the upper port of the U-shaped groove 27, and the air is continuously gathered in the connecting groove 233; when the polishing block 232 is extruded by the return disc blank to enter the connecting groove 233, the polishing block 232 passes over the upper port of the U-shaped groove 27, at this time, the polishing block 232 is positioned between the two ports of the U-shaped groove 27, so that the gas entering the connecting groove 233 flows to the upper end of the polishing block 232 through the U-shaped groove 27, at this time, the air hole 235 connected with the connecting groove 233 at the upper end of the polishing block 232 is not blocked by the polishing block 232 any more, the gas flowing to the upper end of the polishing block 232 can be sprayed out from the air hole 235, the air hole 235 is in a horn shape, the gas sprayed out from the air hole 235 is compressed, the gas spraying speed is increased, the blowing effect of the gas on burrs in the planing groove is improved, the dropping of the burrs is accelerated, the non-woven fabric 29 is prevented, the non-woven fabric 29 blocks the air hole 235, the air hole 235 is prevented from being blocked by external metal particles when the non-woven fabric 29 is not used, the normal use of the air hole 235 is further ensured, and when the rotating ring 2 descends, the air hole 263 in the pressure stabilizing groove 26 is pushed by the reset spring 264 to be close to the rubber plug, the air inlet 281 on the surface of the air pipe 28, the external gas can be sprayed out from the air hole 235, the air hole 235 is further blown out from the air hole 26 through the air inlet 281, the air hole 26 is prevented from being further blown out from the air inlet 26, the air hole 26 is further, the air hole is prevented from being blown into the air inlet 26, and the air hole is further, and the air hole is more stable, and the air hole is prevented from being blown into the air hole and can be more effectively by the air through the air inlet through the air hole.
The specific working procedure is as follows:
when in operation, a user firstly controls the servo motor 133 to drive the screw 134 to rotate, so that the two clamping blocks 131 are far away from each other under the drive of the screw 134, a worker places the press roller 13 matched with the lower die 14 between the two clamping blocks 131, controls the servo motor 133 to reversely rotate, so that the servo motor 133 can drive the screw 134 to reversely rotate, so that the two clamping blocks 131 are close to each other, the two clamping blocks 131 can clamp the press roller 13, and controls the hydraulic push rod 11 to push the upper die 12 to ascend, so that the upper die 12 drives the press plate 122 to ascend and be positioned above the lower die 14, and places the lower die 14 into the mounting port 15; since the lower die 14 is annular; the center of the lower die 14 is opposite to the axis of the upper die 12, a return disc blank is placed at the upper end of the upper die 12, and at the moment, the return disc blank and the lower die 14 are on the same central axis, and the hydraulic push rod 11 is controlled to descend so that the upper die 12 drives the pressing plate 122 to be close to the lower die 14; the pressing plate 122 fixedly presses the disc on the upper end of the lower die 14 under the action of self gravity; the driving motor 17 is controlled to operate, so that the driving motor 17 can drive the straight rod 21 to rotate, the straight rod 21 drives the rotating ring 2 to rotate, the rotating ring 2 rotates in the circular groove 16, the rotating ring 2 can spirally drive upwards along the spiral of the inner wall of the circular groove 16, the rotating ring 2 drives the planing tool 22 and the sander 23 to ascend, the planing tool 22 and the sander 23 enter the inner ring of the lower die 14, the planing tool 22 and the sander 23 slide upwards along the inner ring wall of the lower die 14, the planing tool 22 is contacted with the lower end surface of the blank of the return disc, the planing tool 22 can plane the lower end surface of the blank of the return disc while the rotating ring 2 rotates, the lower end surface of the blank of the return disc generates annular planing groove until the rotating ring 2 enters the annular groove 162, the sander 23 contacts with the port surface of the planing groove, the sander 23 can polish the port surface of the planing groove, when polishing is completed, the driving motor 17 is controlled to reversely rotate, so that the driving motor 17 drives the swivel 2 to enter the spiral groove 161 from the annular groove 162, the swivel 2 is driven downwards along the spiral groove 161, the swivel 2 drives the sander 23 and the planing tool 22 to enter the circular groove 16, the hydraulic push rod 11 is controlled to descend, the hydraulic push rod 11 drives the upper die 12 to approach the lower die 14, the slide rod 121 enters the machine body 1 under the driving of the upper die 12, the pressing plate 122 approaches the upper die 12, the pressing roller 13 positioned on the upper die 12 can penetrate the pressing plate 122 and contact with the blank of the return disc, the pressing roller 13 presses the blank of the return disc, the blank of the return disc can be bent downwards along the planing groove until the upper die 12 contacts with the lower die 14 through the pressing plate 122, the bending part of the blank of the return disc and the blank of the return disc are mutually perpendicular, then the hydraulic push rod 11 is controlled to stretch, the hydraulic push rod 11 can push the upper die 12 and the pressing plate 122 to separate, at the moment, the pressing plate 122 generates pressure on the blank of the return disc, so that the blank of the return disc is convenient to separate from the pressing roller 13, when the upper die 12 drives the pressing plate 122 to ascend through the slide rod 121, the pressing plate 122 is separated from the lower die 14, and a user takes down the blank of the return disc on the lower die 14;
the pressure stabilizing groove 26 is located above the groove 25, when the driving motor 17 drives the rotating ring 2 to rotate and ascend along the circular groove 16, the rotating ring 2 can drive the pressurizing block 252 in the groove 25 to slide upwards along the chute 211 on the surface of the straight rod 21, when the rotating ring 2 drives the planer tool 22 at the upper end to enter the mounting port 15, the pressurizing block 252 in the groove 25 slides along the inclined plane of the chute 211, so that the pressurizing block 252 can be extruded by the inclined plane of the chute 211 to enter the groove 25, and because the pressure stabilizing groove 26 is located above the groove 25, a part of hydraulic oil can enter the pressure stabilizing groove 26 through a connecting port of the pressure stabilizing groove 26 and the groove 25, at this moment, hydraulic oil in the pressure stabilizing groove 26 can generate thrust to the hydraulic oil in the groove 25 under the action of gravity of the self, so that the hydraulic oil in the groove 25 cannot enter the pressure stabilizing groove 26 until the moving pressurizing block 252 blocks the connecting port 252, so that the hydraulic oil in the groove 25 is extruded by the pressurizing block 251 only can enter the L-shaped groove 24, so that the planer tool 22 in the L-shaped groove 24 is extruded by the straight rod 22, and the hydraulic oil 22 is pushed by the air passage 251, so that the hydraulic oil can not enter the L-shaped groove 22, and the lower die 22 is pushed by the lower die 22, and the pressure of the pressure stabilizing block is further pushed by the rubber die 14, and the friction is prevented from entering the lower die 14, and the pressure stabilizing groove 14 is further, and the pressure is prevented from being pushed by the pressure stabilizing block 22, and the pressure reducing die 14, the pressure is further, and the pressure is further increased, the pressure of the pressure reducing die 22 is greatly caused by the pressure of the pressure reducing die and the pressure of the pressure stabilizing block 22 and the pressure is further, and the pressure reducing die 22; when the driving motor 17 reversely rotates, the rotary ring 2 rotates and descends, the pressurizing block 252 slides downwards along the chute 211, at the moment, the pressurizing block 252 is reset under the pulling of the chute wall of the chute 211, so that the hydraulic oil pressure in the groove 25 and the L-shaped groove 24 is reduced to a negative pressure state, at the moment, the planing tool 22 and the sander 23 are continuously close to the straight rod 21 under the adsorption of negative pressure until the pressurizing block 252 passes over a connecting port of the pressure stabilizing groove 26 and the groove 25, and at the moment, the hydraulic oil in the pressure stabilizer flows out; in the initial state, the return spring 264 pushes the sealing plate 263 to the bottom of the pressure stabilizing groove 26, at this time, the sealing plate 263 blocks the connection port between the pressure stabilizing groove 26 and the groove 25, so that hydraulic oil is prevented from being pushed by the pressurizing block 252 to enter the pressure stabilizing groove 26 along the connection port between the pressure stabilizing groove 26 and the groove 25; when the planing tool 22 is in contact with the inner annular wall of the lower die 14, the pressure of hydraulic oil is increased, so that the hydraulic oil pushes a rubber plug to enter the stabilizing groove 26, at the moment, the hydraulic oil is located between the sealing plate 263 and the stabilizing groove 26, so that the hydraulic oil of the sealing plate 263 pushes and extrudes the return spring 264 to move towards the upper end face of the stabilizing groove 26, gas in the stabilizing groove 26 enters the connecting groove 233 through the gas pipe 28, at the moment, a closing unit in the gas hole 235 is in a closed state, so that the gas entering the connecting groove 233 cannot be sprayed out through the gas hole 235 until the swivel 2 enters the annular groove 162, at the moment, the swivel 2 drives the polishing block 232 to be in contact with the lower end face of a return disc blank, so that the polishing block 232 is pushed into the connecting groove 233 of the connecting rod 231 by the blocking force of the lower end face of the blank, at the moment, the connecting spring 234 pushes the polishing block 232 to polish the lower end of the planing disc blank under the action of self-restoring force, so that burrs in the planing groove are polished, and at the moment, when the polishing block 232 enters the connecting groove 233, the gas hole 235 cannot be sprayed out through the gas hole 235, the gas in the blowing groove 38b can be sprayed out from the air hole; when the gas in the pressure stabilizing groove 26 enters the connecting groove 233 through the gas pipe 28, the grinding block 232 is close to the notch of the connecting groove 233 under the pushing of the connecting spring 234, the grinding block 232 blocks the upper port of the U-shaped groove 27, and the gas is continuously accumulated in the connecting groove 233; when the polishing block 232 is extruded by the return disc blank to enter the connecting groove 233, the polishing block 232 passes over the upper port of the U-shaped groove 27, at this time, the polishing block 232 is positioned between the two ports of the U-shaped groove 27, so that the gas entering the connecting groove 233 flows to the upper end of the polishing block 232 through the U-shaped groove 27, at this time, the air hole 235 connected with the connecting groove 233 at the upper end of the polishing block 232 is not blocked by the polishing block 232 any more, the gas flowing to the upper end of the polishing block 232 can be sprayed out from the air hole 235, the air hole 235 is in a horn shape, the gas sprayed out from the air hole 235 is compressed, the gas spraying speed is increased, the blowing effect of the gas on burrs in the planing groove is improved, the dropping of the burrs is accelerated, the non-woven fabric 29 is prevented, the non-woven fabric 29 blocks the air hole 235, the air hole 235 is prevented from being blocked by external metal particles when the non-woven fabric 29 is not used, the normal use of the air hole 235 is further ensured, and when the rotating ring 2 descends, the air hole 263 in the pressure stabilizing groove 26 is pushed by the reset spring 264 to be close to the rubber plug, the air inlet 281 on the surface of the air pipe 28, the external gas can be sprayed out from the air hole 235, the air hole 235 is further blown out from the air hole 26 through the air inlet 281, the air hole 26 is prevented from being further blown out from the air inlet 26, the air hole 26 is further, the air hole is prevented from being blown into the air inlet 26, and the air hole is further, and the air hole is more stable, and the air hole is prevented from being blown into the air hole and can be more effectively by the air through the air inlet through the air hole.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in fig. 1, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of the present invention, and furthermore, the terms "first", "second", "third", etc. are merely used for distinguishing the description, and should not be construed as indicating or implying relative importance.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A hydraulic pump return disc blank bending system and a process are characterized in that: the method comprises the following steps:
s1: firstly punching a required concentric disc blank by a punching machine, then placing the concentric disc in a lower die (14) of a bending machine, wherein the concentric disc and the lower die (14) are positioned on the same central shaft, and controlling a hydraulic push rod (11) to descend so that an upper die (12) drives a pressing plate (122) to be close to the lower die (14); at the moment, the pressing plate (122) fixedly presses the disc at the upper end of the lower die (14) under the action of self gravity;
s2: at the moment, the driving motor (17) is controlled to run, so that the driving motor (17) drives the swivel (2) to rotate upwards in the circular groove (16), the swivel (2) drives the planing tool (22) to rotate, and meanwhile, the planing tool (22) ascends and contacts with the circular disc, so that the planing tool (22) performs grooving on the circular disc, and at the moment, the sander (23) polishes burrs on the surface of the planing groove;
s3: after polishing, the driving motor (17) reversely rotates and drives the turntable to reset, at the moment, the hydraulic push rod (11) contracts, so that the lower die (14) drives the press roller (13) to descend, the press roller (13) enters the inner ring of the disc, and the press roller (13) pushes the inner ring of the disc to bend downwards along the planing groove; finally, cutting a required round hole on the surface of the bent disc blank by utilizing a laser cutting technology, thereby obtaining a return disc blank, and finally, preparing the return disc blank into a required return disc through surface treatment;
wherein, the bending machine used in S1 includes:
the device comprises a machine body (1), wherein a hydraulic push rod (11) is fixedly connected to the upper end of the machine body (1); an upper die (12) is fixedly connected to the upper end of the hydraulic push rod (11); a slide bar (121) is fixedly connected to the lower end of the upper die (12); the surface of the sliding rod (121) is connected with a pressing plate (122) in a sliding manner; a press roller (13) is fixedly arranged at the lower end of the upper die (12); a clamping module is arranged between the pressing roller (13) and the upper die (12); the clamping module is used for clamping the press roller (13);
the lower die (14) is arranged at the upper end of the machine body (1) and provided with a mounting opening (15); the lower die (14) is connected in the mounting port (15) in a sliding way; a round groove (16) communicated with the mounting opening (15) is formed in the lower end of the machine body (1); the circular groove (16) is rotationally connected with a swivel (2); a spiral groove (161) is formed in the inner wall of the circular groove (16); an annular groove (162) communicated with the spiral groove (161) is formed in one end, close to the mounting opening (15), of the circular groove (16); the swivel (2) is rotationally connected with the machine body (1); the inner annular wall of the swivel (2) is connected with a straight rod (21) in a sliding manner; the lower end of the straight rod (21) is fixedly connected with the output end of the driving motor (17); the driving motor (17) is fixedly connected with the machine body (1); a planing tool (22) and a sander (23) are fixedly arranged at the upper end of the swivel (2); the planing tool (22) and the sander (23) are positioned on two sides of the straight rod (21).
2. The hydraulic pump return tray blank bending system and process according to claim 1, wherein: the clamping module comprises a clamping block (131); a chute (132) is formed at the lower end of the upper die (12); the sliding block is connected in the sliding groove (132) in a sliding way; the number of the clamping blocks (131) is two; the two clamping blocks (131) are rotationally connected through a screw rod; one side of the upper die (12) is fixedly connected with a servo motor (133); one end of the screw rod is rotationally connected to the side wall of the chute (132), and the other end of the screw rod is fixedly connected with the output end of the servo motor (133).
3. The hydraulic pump return tray blank bending system and process according to claim 2, wherein: two opposite L-shaped grooves (24) are formed in the upper end of the swivel (2); the planing tool (22) and the sander (23) are respectively and slidably connected in two L-shaped grooves (24); a groove (25) is formed in the inner wall of the swivel (2); the groove (25) is communicated with the L-shaped groove (24) through an air passage (251); a pressurizing block (252) is connected in a sliding manner in the groove (25); the surface of the straight rod (21) is provided with a chute (211); the pressurizing block (252) is connected in the chute (211) in a sliding way; hydraulic oil is arranged in the groove (25); the swivel (2) is internally provided with a voltage stabilizing module; the pressure stabilizing module is used for controlling the pressure of hydraulic oil in the L-shaped groove (24).
4. The hydraulic pump return tray blank bending system and process according to claim 3, wherein: the voltage stabilizing module comprises a voltage stabilizing groove (26); the pressure stabilizing groove (26) is communicated with the L-shaped groove (24); one end, close to the L-shaped groove (24), in the pressure stabilizing groove (26) is arranged in a horn shape; a rubber block (261) is connected in a sliding and sealing manner in the pressure stabilizing groove (26); one end of the rubber block (261) far away from the L-shaped groove (24) is fixedly connected with the groove bottom of the pressure stabilizing groove (26) through a compression spring (262); the bottom of the pressure stabilizing groove (26) is communicated with the groove (25).
5. The hydraulic pump return tray blank bending system and process as claimed in claim 4, wherein: the sander (23) comprises a connecting rod (231) and a sanding block (232); the connecting rod (231) is connected in the L-shaped groove (24) in a sliding way; the upper end of the connecting rod (231) is provided with a connecting groove (233); the polishing block (232) is fixedly connected in the connecting groove (233) through a connecting spring (234).
6. The hydraulic pump return tray blank bending system and process according to claim 5, wherein: a sealing plate (263) is connected in a sliding and sealing manner in the pressure stabilizing groove (26); an air hole (235) is formed in the surface of the connecting rod (231); the air hole (235) is communicated with the connecting groove (233); the connecting groove (233) is communicated with the pressure stabilizing groove (26) through an air pipe (28); the sealing plate (263) is fixedly connected with the upper end wall of the pressure stabilizing groove (26) through a return spring (264); a closing unit is arranged in the air hole (235); the closing unit is used for controlling the closing of the air holes (235); one end of the compression spring (262) far away from the rubber block (261) is fixedly connected with the sealing plate (263).
7. The hydraulic pump return tray blank bending system and process as claimed in claim 6, wherein: the closing unit comprises a U-shaped groove (27); the U-shaped groove (27) is formed in the inner wall of the connecting groove (233); an air inlet (281) is formed in the surface of the air pipe (28); a one-way valve (282) is arranged in the air inlet (281).
8. The hydraulic pump return tray blank bending system and process as claimed in claim 7, wherein: one end, far away from the connecting groove (233), of the two ends of the air hole (235) is smaller in diameter; one end of the air hole (235) far away from the connecting groove (233) is fixedly connected with a non-woven fabric (29).
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| CN202310532421.8A CN116852113B (en) | 2023-05-12 | 2023-05-12 | Hydraulic pump return disc blank bending process |
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| CN202310532421.8A CN116852113B (en) | 2023-05-12 | 2023-05-12 | Hydraulic pump return disc blank bending process |
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| CN116852113B CN116852113B (en) | 2024-07-02 |
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| CN116852113B (en) | 2024-07-02 |
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