US-12623296-B2 - Bench pipe threading machine and threading method

US12623296B2US 12623296 B2US12623296 B2US 12623296B2US-12623296-B2

Abstract

A bench pipe threading machine and a threading method are provided. The bench pipe threading machine includes a spindle assembly, a die head assembly, a cutter assembly, a reamer assembly, a lifting handle assembly, and a frame assembly. The spindle assembly, the die head assembly, the cutter assembly, the reamer assembly, and the lifting handle assembly are mounted on the frame assembly. The die head assembly, the cutter assembly, and the reamer assembly are respectively matched with the spindle assembly. The frame assembly includes a frame mechanism and a carriage mechanism that is mounted on the frame mechanism. A transmission mechanism is mounted in the frame mechanism and connected to the spindle assembly. The spindle assembly and the lifting handle assembly are mounted on the frame mechanism. The die head assembly, the cutter assembly, and the reamer assembly are mounted on the carriage mechanism.

Inventors

Hongwu XIE
Chenchen FEI

Assignees

Hangzhou Hongli Pipe Machinery Co., Ltd

Dates

Publication Date: 20260512
Application Date: 20220901
Priority Date: 20210901

Claims (9)

1 . A bench machine for threading a pipe, the machine comprising a spindle assembly, a die head assembly, a cutter assembly, a reamer assembly, a lifting handle assembly, and a frame assembly, wherein the spindle assembly, the die head assembly, the cutter assembly, the reamer assembly, and the lifting handle assembly are all mounted on the frame assembly, and the die head assembly, the cutter assembly, and the reamer assembly are configured to cooperate with the spindle assembly; the frame assembly comprises a frame mechanism and a carriage mechanism, wherein the carriage mechanism is mounted on the frame mechanism, a transmission mechanism is mounted in the frame mechanism and connected to the spindle assembly, the spindle assembly and the lifting handle assembly are mounted on the frame mechanism, and the die head assembly, the cutter assembly, and the reamer assembly are mounted on the carriage mechanism; the spindle assembly comprises a front chuck, a rear chuck, a spindle, a rotating disc, a spindle gear, and a spindle bearing, wherein the spindle gear is mounted at a first end of the spindle, wherein the front chuck is mounted on the spindle gear, the rear chuck is mounted at a second end of the spindle, the rotating disc is mounted on the front chuck, the spindle bearing is sleeved on the spindle, and the spindle is mounted on the frame assembly via the spindle bearing; wherein the die head assembly comprises a die disc, a die, a curve disc, a retaining ring, a trigger mechanism, a locking block mechanism, a slider mechanism, and an adjustment eccentric shaft, wherein the die is mounted on the die disc, the curve disc is mounted on the die disc via the retaining ring and configured to cooperate with the die, the slider mechanism is configured to cooperate with the die disc, the locking block mechanism is mounted on the slider mechanism, the adjustment eccentric shaft is mounted on the curve disc and configured to cooperate with the locking block mechanism, the trigger mechanism is mounted on the die disc and configured to cooperate with the slider mechanism, and the die disc is mounted on the frame assembly.
2 . The bench machine for threading a pipe according to claim 1 , wherein the carriage mechanism comprises a forward guide pillar, a back guide pillar, a carriage body, a carriage handle, carriage engagement teeth, and a carriage gear, wherein the forward guide pillar and the rear guide pillar are mounted on the frame mechanism, where the forward guide pillar is closer to the carriage engagement teeth than the back guide pillar is, the carriage body is mounted on the forward guide pillar and the back guide pillar, the carriage handle is mounted on the carriage body, the carriage engagement teeth are arranged on the forward guide pillar, the carriage gear is connected to the carriage handle, the carriage engagement teeth are engaged with the carriage gear, and the die head assembly and the cutter assembly are mounted on the carriage body; and the bench machine further comprises a lithium battery assembly for supplying power.
3 . The bench machine for threading a pipe according to claim 1 , wherein the slider mechanism comprises a slider body, a slider reset spring, a slider buffer spring, a spring connection pillar, a spring ejection pillar, and a trigger limiting groove, wherein the spring connection pillar is arranged on the slider body, a first end of the slider reset spring and a first end of the slider buffer spring are connected to the spring connection pillar, each of a second end of the slider reset spring and a second end of the slider buffer spring is connected to the spring ejection pillar, the spring ejection pillar is arranged on the die disc, and the trigger limiting groove is arranged on the slider body and configured to cooperate with the trigger mechanism.
4 . The bench machine for threading a pipe according to claim 1 , wherein the locking block mechanism comprises a locking block body, a locking block rotating shaft, a locking block positioning groove, a locking block positioning pillar, a locking block positioning spring, and a locking block adjustment groove, wherein the locking block body is mounted on the slider mechanism via the locking block rotating shaft, the locking block positioning groove is arranged on the locking block body, the locking block positioning pillar is mounted on the slider mechanism via the locking block positioning spring, the locking block positioning pillar is located in the locking block positioning groove, the locking block adjustment groove is arranged on the locking block body, and the adjustment eccentric shaft is located in the locking block adjustment groove.
5 . The bench machine for threading a pipe according to claim 1 , wherein the trigger mechanism comprises a trigger body, a trigger rotating shaft, a trigger torsion spring, and a trigger limiting pillar, wherein the trigger body is mounted on the die disc via the trigger rotating shaft, the trigger torsion spring is sleeved on the trigger rotating shaft, the trigger torsion spring comprises a first end in contact with the die disc and a second end in contact with the trigger body, and a trigger limiting column comprises a first end connected to the trigger body and the trigger limiting column further comprises a second end in contact with an end surface of the slider body.
6 . The bench machine for threading a pipe according to claim 1 , wherein the cutter assembly comprises a cutter frame, a cutter seat, a cutter wheel, a cutter handle, and a cutter roller, wherein the cutter seat, the cutter handle, and the cutter roller are mounted on the cutter frame, the cutter wheel is mounted on the cutter seat, the cutter wheel is configured to cooperate with the cutter roller, the cutter handle is in contact with the cutter seat, and the cutter frame is mounted on the frame assembly.
7 . The bench machine for threading a pipe according to claim 1 , wherein the reamer assembly comprises a reamer seat, a reamer cone, a reamer stop pin, a reamer retainer ring, a reamer pressure spring, a reamer handle, and a reamer rotating shaft, wherein the reamer cone is mounted on the reamer seat, the reamer stop pin is mounted on the reamer seat via the reamer retainer ring, the reamer pressure spring is sleeved on the reamer stop pin, the reamer pressure spring comprises a first end in contact with the reamer seat and a second end in contact with the reamer stop pin, the reamer handle is mounted on the reamer stop pin, and the reamer seat is mounted on the frame assembly via the reamer rotating shaft.
8 . The bench machine for threading a pipe according to claim 1 , wherein the lifting handle assembly comprises a lifting handle, a lifting handle rod, a lifting handle seat, and a lifting handle positioning mechanism, wherein the lifting handle is mounted on the lifting handle rod, the lifting handle rod is mounted on the lifting handle seat, and the lifting handle seat is configured to cooperate with the lifting handle positioning mechanism.
9 . A threading method of using the bench threading machine according to claim 1 , comprising the following steps: step one, preparation before work: placing the cutter assembly, the die head assembly, and the reamer assembly at non-working positions; and providing a pipe fitting that is to be processed that is longer than the front chuck and inserting the pipe fitting into the spindle and into the front chuck from the rear chuck, rotating the rotating disc in a screwing direction, pre-clamping the pipe fitting, screwing the rear chuck, enabling the pipe fitting to be concentric with the spindle gear, and forcibly rotating the rotating disc in the screwing direction, to enable the front chuck to clamp the pipe fitting; step two, power-on check: pressing down a button switch to enable the switch to be in a closed state such that a transmission motor drives two groups of transmission gears to rotate, a first group of the two groups of the transmission gears drives a gear pump to rotate, a second group of the two groups of the transmission gears drives the spindle gear to rotate, the spindle gear drives the front chuck, the rear chuck, the spindle, and the pipe fitting to rotate, and threading oil flows into an oil pool of a machine body of the frame mechanism from a carriage body of the carriage mechanism; step three, pipe cutting work: placing the cutter assembly at a working position, rotating a cutter handle to enable the pipe fitting and a cutter wheel to be at positions, rotating the cutter handle clockwise, and rotating the pipe fitting so that the cutter wheel cuts off the pipe fitting, completing the pipe cutting work; step four, inner angle chamfering work: placing the reamer assembly at a working position, rotating a reamer handle clockwise to enable a conical surface of a reamer cone and a conical surface of a reamer seat to be in contact with an inner hole edge of the pipe fitting, rotating the reamer handle clockwise, and forming a chamfer on the inner hole edge of the pipe fitting via the reamer cone; and step five, processing of external pipe threads: placing the die head assembly at a working position, pouring a lubricating and cooling liquid on a die of the die head assembly, rotating a carriage handle clockwise to enable an end surface of the pipe fitting to be in contact with the die, rotating the carriage handle clockwise, to enable the die to process threads on an outer wall of the pipe fitting; after the thread processing is completed, placing the trigger mechanism at an opening position, enabling the locking block mechanism to break away from a limit of the trigger mechanism to drive the curve disc to be in a disengaged state, and the die to break away from the pipe fitting to complete the external thread processing; and rotating the carriage handle counterclockwise to separate the die head assembly from the pipe fitting, pushing the curve disc to enable the trigger mechanism to be at a closed position, wherein the curve disc drives the die to be at a working position, to perform next processing of the external pipe threads.

Description

CROSS REFERENCE TO THE RELATED APPLICATIONS This application is based upon and claims priority to Chinese Patent Application No. 202111021635.6, filed on Sep. 1, 2021, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present disclosure relates to a bench pipe threading machine and a threading method, which belong to the field of external thread processing devices. The bench pipe threading machine is mainly configured to process external pipe threads and cut off pipe fittings in the pipeline connection in such industries as construction, fire protection, petroleum, and chemical industries, and can also be configured to mount pipe joints for the pipe fittings having the processed external pipe threads. In addition, this machine can also process metric external threads. BACKGROUND The threading machine is often referred to as an electric threading machine, an electric pipe threading machine, a twisting machine, a pipe threading machine, and a steel bar threading machine. The threading machine is an electrical tool that gradually replaced the manual pipe threading plates that were used before 1980. The threading machines simplify and expedite the pipe thread machining process during pipe mounting and reduce the labor intensity of pipe mounting workers. Most of the existing external thread processing devices use an induction motor or a universal motor as the power source. Although the induction motor can meet the requirement of a rated power, the size and weight of the induction motor are too large, making the device bulky and heavy. The universal motor has reduced the size and weight while meeting a rated power, but it typically generates much noise and thus leads to bad user experience. In view of this, the Chinese patent No. 201702474 U discloses an electric pipe threading machine. However, it still has the problem of large motor size and weight as well as noise. SUMMARY An objective of the present disclosure is to provide a bench pipe threading machine and a threading method to overcome the foregoing shortcomings in the prior art. The present disclosure adopts the following technical solutions to solve the above problems. The bench pipe threading machine includes a spindle assembly, a die head assembly, a cutter assembly, a reamer assembly, a lifting handle assembly, and a frame assembly. The spindle assembly, the die head assembly, the cutter assembly, the reamer assembly, and the lifting handle assembly are all mounted on the frame assembly. The die head assembly, the cutter assembly, and the reamer assembly are respectively matched with the spindle assembly. The frame assembly includes a frame mechanism and a carriage mechanism mounted on the frame mechanism. A transmission mechanism is mounted in the frame mechanism and connected to the spindle assembly. Both the spindle assembly and the lifting handle assembly are mounted on the frame mechanism. The die head assembly, the cutter assembly, and the reamer assembly are all mounted on the carriage mechanism. The spindle assembly includes a front chuck, a rear chuck, a spindle, a hammering disc, a spindle gear, and a spindle bearing. The spindle gear is mounted at one end of the spindle, the front chuck is mounted on the spindle gear, and the rear chuck is mounted at the other end of the spindle. The hammering disc is mounted on the front chuck. The spindle bearing is sleeved on the spindle, and the spindle is mounted on the frame assembly through the spindle bearing. Furthermore, the carriage mechanism includes a front guide pillar, a rear guide pillar, a carriage body, a carriage handle, carriage engagement teeth, and a carriage gear. Both the front guide pillar and the rear guide pillar are mounted on the frame mechanism. The carriage body is mounted on the front guide pillar and the rear guide pillar. The carriage handle is mounted on the carriage body. The carriage engagement teeth are arranged on the front guide pillar. The carriage gear is connected to the carriage handle. The carriage engagement teeth are engaged with the carriage gear. The die head assembly, the cutter assembly, and the reamer assembly are all mounted on the carriage body. Furthermore, the bench pipe threading machine further includes a lithium battery assembly for supplying power to the bench pipe threading machine. Furthermore, the die head assembly includes a die disc, a die, a curve disc, a retaining ring, a trigger mechanism, a locking block mechanism, a slider mechanism, and an adjustment eccentric shaft. The die is mounted on the die disc. The curve disc is mounted on the die disc through the retaining ring and matched with the die. The slider mechanism is matched with the die disc. The locking block mechanism is mounted on the slider mechanism. The adjustment eccentric shaft is mounted on the curve disc and matched with the locking block mechanism. The trigger mechanism is mounted on the die disc and matched with the slider mechanism, an