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CN-122008012-A - Pipe fitting inside polishing equipment for engineering machinery

CN122008012ACN 122008012 ACN122008012 ACN 122008012ACN-122008012-A

Abstract

The invention belongs to the technical field of intelligent grinding devices, and particularly relates to pipe fitting internal grinding equipment for engineering machinery, which comprises a grinding machine, wherein the grinding machine comprises a workbench, a stabilizing mechanism is arranged on the workbench, the stabilizing mechanism comprises a bottom plate, two U-shaped seats are arranged above the bottom plate, threaded grooves are formed in the two U-shaped seats, threaded rods are engaged in the threaded grooves, a gear shaft is fixed at the top of the threaded rods, a U-shaped plate is arranged above the gear shaft, two arc-shaped blocks are fixed at the top of the U-shaped plate, worms are rotated in the U-shaped seats, the two worms are connected through a connecting rod, a plurality of support assemblies are arranged between the two U-shaped seats, and the fixing mechanism can prevent the contact pressure between an inner ring and a grinding roller from periodically changing suddenly due to radial runout of the pipe fitting, so that the local area of the inner ring is over-ground and under-ground alternately occurs.

Inventors

  • Sui Yuanzhong
  • WEI BIAO
  • CHEN CONGMEI
  • XU JUNFU

Assignees

  • 合肥固恒工程机械设备有限公司

Dates

Publication Date
20260512
Application Date
20260323

Claims (9)

  1. 1. The pipe fitting internal polishing equipment for the engineering machinery comprises a polishing machine, wherein a polishing mechanism and a driving mechanism are arranged on the polishing machine; The workbench is provided with a stabilizing mechanism, wherein the stabilizing mechanism comprises a bottom plate (1), and two U-shaped seats (11) are arranged above the bottom plate (1); a screw rod (13) is engaged in the screw grooves (12) in a threaded manner, and a limiting ring (14) is fixed on the screw rod (13); The screw rod (13) is fixedly provided with a gear shaft (15), a U-shaped plate (16) is arranged above the gear shaft (15), the gear shaft (15) rotates on the U-shaped plate (16), two arc-shaped blocks (17) are fixedly arranged at the top of the U-shaped plate (16), and rollers (18) are respectively rotated at the bottoms of the arc-shaped blocks (17); A worm (19) is rotated in the U-shaped seat (11), and the worm (19) is meshed with the gear shaft (15), and the two worms (19) are connected through a connecting rod (191), wherein one worm (19) is driven by a first motor; a plurality of supporting components are arranged between the two U-shaped seats (11), and the number of the supporting components is four or more, wherein the supporting components comprise two vertical plates (2), and n-type grooves are formed in the vertical plates (2); an arc-shaped plate (21) is arranged between the two vertical plates (2), two rotating balls (22) are rotated at the top of the arc-shaped plate (21), and sliding blocks (23) are fixed on two sides of the arc-shaped plate (21); the two vertical plates (2) are provided with sliding grooves on one sides facing the sliding blocks (23), the sliding blocks (23) slide in the sliding grooves, springs are connected to the bottoms of the sliding blocks (23), and the other sides of the springs are fixed in the sliding grooves.
  2. 2. The pipe fitting internal polishing device for engineering machinery according to claim 1, wherein a polishing mechanism is arranged on the left side of the stabilizing mechanism, the polishing mechanism comprises a sliding seat (3), the sliding seat (3) is driven by a screw rod, a second motor is arranged on the sliding seat (3), a rotating shaft (31) is arranged on the second motor, the tail end of the rotating shaft (31) is fixedly provided with a mounting shaft (32), and a polishing wheel (33) is arranged on the mounting shaft (32) through a locking nut; The top of the stabilizing mechanism is provided with a driving mechanism, the driving mechanism comprises an n-type frame (34), two driving wheels (35) are arranged in the n-type frame (34) in a rotating mode through a driving rod, the driving wheels (35) are made of elastic rubber materials and are driven through a third motor, and hydraulic cylinders (36) are arranged on two sides of the n-type frame (34).
  3. 3. The pipe fitting internal polishing device for engineering machinery according to claim 1, wherein a fixed bin (24) is fixed at the bottom of each arc-shaped plate (21), and the fixed bin (24) is downward in opening; the fixed bin (24) is internally provided with a jacking block (25) in a sliding mode, the jacking block (25) is arranged in the fixed bin (24) in a sliding mode through a spring, the bottom of the jacking block (25) is provided with a semicircular groove, and the connecting rod (191) penetrates through the semicircular groove.
  4. 4. The pipe fitting internal polishing device for engineering machinery according to claim 3, wherein tooth grooves are formed in the surface of the connecting rod (191); A limiting wheel (26) rotates in the semicircular groove of the top block (25), and the limiting wheel (26) is meshed with the tooth groove.
  5. 5. The pipe fitting internal polishing device for engineering machinery according to claim 4, wherein two rotary drums (4) are arranged between the two vertical plates (2) of each supporting assembly, and the rotary drums (4) rotate on one of the vertical plates (2); two straight rods (42) are fixed between the two U-shaped seats (11), and the straight rods (42) pass through the vertical plates (2) which are not provided with the rotating drum (4) and pass through the rotating drum (4); threads are formed on the inner ring of the rotary drum (4), and threads meshed with the threads of the inner ring of the rotary drum (4) are formed on one side, located in the rotary drum (4), of the straight rod (42); The ratchet teeth (41) are fixed on the outer ring surface of the rotary drum (4), a U-shaped frame (43) is fixed at the bottom of the fixed bin (24), and the connecting rod (191) passes through the U-shaped frame (43); two fixing plates (44) are fixed at the bottom of the U-shaped frame (43), the fixing plates (44) are respectively positioned at the left sides of the two rotary drums (4), pawls (45) are hinged to one sides of the two fixing plates (44) towards the ratchet teeth (41), the pawls (45) are meshed with the ratchet teeth (41) when moving downwards, and the pawls (45) rotate when moving upwards.
  6. 6. The pipe fitting internal polishing apparatus for construction machine according to claim 2, wherein an auxiliary mechanism is mounted on a U-shaped plate (16) adjacent to the polishing mechanism; The auxiliary mechanism comprises two side plates (5), wherein a slideway is arranged on one side of the two side plates (5) opposite to each other, and a driven plate (51) is arranged between the two side plates (5) in a sliding manner; The top of the driven plate (51) is fixedly provided with a first U-shaped block (52), the first U-shaped block (52) is positioned at one side of the top of the driven plate (51) far away from the polishing mechanism, and the mounting shaft (32) is positioned in the first U-shaped block (52); The bottom of the driven plate (51) is provided with uniformly arranged balls in a rotating mode, and the top of the first U-shaped block (52) is provided with balls in a rotating mode.
  7. 7. The pipe fitting internal polishing device for engineering machinery according to claim 6, wherein an air groove (53) is formed in the driven plate (51), and the air groove (53) is communicated with an external dust collector through an air pipe; a vertical groove (54) is formed in the bottom of the driven plate (51), and the vertical groove (54) is positioned below the first U-shaped block (52), an inclined plate (55) is arranged on the side edge of the vertical groove (54), and the inclined plate (55) slides in the driven plate (51); the inclined plate (55) is rounded off towards one side of the stabilizing mechanism.
  8. 8. The pipe fitting internal polishing device for engineering machinery according to claim 7, wherein the left side of the first U-shaped block (52) is provided with second U-shaped blocks (56) which are uniformly arranged; The top of the second U-shaped block (56) is also rotated with balls, the grinding wheel (33) is positioned between the first U-shaped block (52) and the second U-shaped block (56), and the rotating shaft (31) passes through the second U-shaped block (56).
  9. 9. The pipe fitting internal polishing device for engineering machinery according to claim 2, wherein the bottom plate (1) comprises a left plate and a right plate, wherein the left plate and the right plate are internally threaded and meshed with a bidirectional screw rod (37), and the bidirectional screw rod (37) is driven by a fourth motor; the connecting rod (191) and the straight rod (42) comprise a left rod and a right rod, rectangular grooves are formed in the left rod and the right rod, and rectangular rods (38) are respectively slid in the rectangular grooves of the left rod and the right rod.

Description

Pipe fitting inside polishing equipment for engineering machinery Technical Field The invention belongs to the technical field of intelligent grinding devices, and particularly relates to pipe fitting internal grinding equipment for engineering machinery. Background The tubular workpiece is used as a core basic part in the fields of fluid transportation, engineering machinery, petrochemical engineering and the like, and the machining precision and the surface quality of the inner ring surface directly determine the assembly suitability, the fluid transmission performance and the service life of the workpiece. After the pipe fitting is formed, the inner ring is easy to remain machining allowance and cutting burrs, and the inner surface is easy to rust in the storage and transportation process, if finish machining treatment is not carried out, the burrs and the rust can cause fluid turbulence and aggravate abrasion of a matching piece, and the sealing performance of a sealing surface can be directly affected due to out-of-tolerance surface roughness, so that the inner ring is polished to become a key process of pipe fitting finish machining. The existing pipe fitting inner ring polishing equipment is integrated with an intelligent manufacturing core module, and adopts a technical scheme that a servo linkage roller drive rotating mechanism and a numerical control feeding polishing unit work cooperatively, so that automation and accurate control of a polishing process are realized. During polishing, a pipe to be processed is accurately placed on two parallel supporting rotary rollers of equipment through a feeding mechanism, the top of the pipe is matched with two groups of driving wheels, the supporting rotary rollers and the driving wheels form a four-point centering clamping structure, the rotary rollers and the driving wheels are synchronously regulated and controlled by a variable frequency servo system to drive the pipe to rotate at a uniform speed and stably in a circumference, a high-precision servo motor is mounted on a numerical control sliding seat of the equipment, the output end of the motor is connected with a high-rigidity transmission long shaft, the polishing rollers are fixedly mounted at the tail end of the long shaft and driven by accurate instructions of a PLC (programmable logic controller) control system to perform constant speed or variable feed motion along the axial direction of the pipe to drive the polishing rollers to stably stretch into the inner ring of the pipe, the composite grinding motion is formed through the high-speed rotation of the polishing rollers and the circumferential rotation of the pipe, the whole length polishing finish machining of the inner ring of the pipe is completed, and the whole equipment is fused with intelligent manufacturing technologies such as numerical control positioning, real-time stroke monitoring and intelligent parameter adjustment, and the like, and the degree of automation and the processing efficiency of polishing operation are greatly improved. However, if irregular protrusions such as raised rust points, welding spots and hard impurities are often remained on the outer surface of the pipe fitting, when the protrusion moves to a contact position with the rotating roller or the driving wheel along with the circumferential direction of the pipe fitting in the process that the pipe fitting is driven to rotate by the supporting rotating roller and the driving wheel, a rigid pushing effect is formed due to the height of the protrusion, the pipe fitting is lifted up instantly, the stable clamping state of four-point centering is directly damaged, and periodic radial runout and irregular high-frequency vibration are generated on the pipe fitting. Meanwhile, high-frequency vibration also can influence the rotating speed stability of a servo driving system and the axial feeding positioning precision of a numerical control sliding seat, so that the whole processing stability of equipment is reduced, even the rigid collision between the grinding roller and a pipe port is possibly caused, the problems of edge breakage, damage of the grinding roller and the like of the pipe port are caused, and the production defective rate and the equipment maintenance cost are greatly improved. Disclosure of Invention In order to overcome the defects of the prior art and solve the technical problems, the invention provides pipe fitting internal polishing equipment for engineering machinery, which can avoid periodic abrupt change of contact pressure between an inner ring and a polishing roller due to radial runout of the pipe fitting by arranging a stabilizing mechanism, and cause the alternation of overgrinding and undergrinding of local areas of the inner ring; The pipe fitting internal polishing equipment for the engineering machinery comprises a polishing machine, wherein a polishing mechanism and a driving mechanism are arranged on the polishing machine; The workbe