阅读说明：本技术 一种外螺纹套丝装置和外螺纹套丝方法 (External thread threading device and external thread threading method ) 是由 肖贤政 王宏 陈永艳 李雄 于 2021-10-19 设计创作，主要内容包括：本发明提供一种外螺纹套丝装置和外螺纹套丝方法,外螺纹套丝装置包括板牙套、导向筒和导引轴,导向筒至少有一端与板牙套焊接在一起,并且导向筒内径大于板牙套内径,导引轴套合于导向筒内并且使导引轴能够沿着导向筒轴向滑动。外螺纹套丝方法包括利用车床并使用外螺纹套丝装置,在工件上套丝加工外螺纹的操作步骤。采用本发明的技术方案,通过导向筒和导引轴组成导向结构,引导工件始终沿着板牙套中心轴线滑移,使工件轴向与板牙套轴向相互重合,防止成型后的外螺纹螺牙出现偏斜、错乱,提高了外螺纹套丝成型质量,另外,通过利用车床主轴轴向与车床尾座轴向的重合关系,提高了工件轴向与板牙套轴向的重合精度,提高了外螺纹套丝成型精度。(The invention provides an external thread threading device and an external thread threading method. The external thread threading method comprises the operation step of utilizing a lathe and using an external thread threading device to thread and machine external threads on a workpiece. By adopting the technical scheme of the invention, the guide structure is formed by the guide cylinder and the guide shaft, the workpiece is guided to always slide along the central axis of the die sleeve, the axial direction of the workpiece and the axial direction of the die sleeve are mutually overlapped, the formed external thread threading is prevented from being deflected and disordered, the forming quality of the external thread threading is improved, in addition, the overlapping precision of the axial direction of the workpiece and the axial direction of the die sleeve is improved by utilizing the overlapping relation of the axial direction of the lathe spindle and the axial direction of the lathe tailstock, and the forming precision of the external thread threading is improved.)

1. The utility model provides an external screw thread mantle fiber device which characterized in that: the die teeth sleeve comprises a die teeth sleeve (1), a guide cylinder (2) and a guide shaft (3), wherein at least one end of the guide cylinder (2) is welded with the die teeth sleeve (1), the inner diameter of the guide cylinder (2) is larger than that of the die teeth sleeve (1), and the guide shaft (3) is sleeved in the guide cylinder (2) and enables the guide shaft (3) to axially slide along the guide cylinder (2).

2. The externally threaded threading device of claim 1 wherein: the guide cylinder is characterized in that a guide hole (4) is further formed in the outer peripheral surface of the guide cylinder (2), a rotation stopping pin (5) is fixedly connected to the guide shaft (3), and the upper end of the rotation stopping pin (5) extends out of the guide hole (4).

3. The externally threaded threading device of claim 2 wherein: the rotation stopping pin (5) can be replaced by a bolt.

4. The externally threaded threading device of claim 2 wherein: the projection of the guide hole (4) on the axial section of the guide cylinder (2) is a waist-shaped through hole.

5. The externally threaded threading device of claim 2 wherein: the length of the guide hole (4) is not less than 50 mm.

6. The externally threaded threading device of claim 1 wherein: the end face of the outer end of the guide shaft (3) is fixedly connected with a supporting handle (6).

7. The externally threaded threading device of claim 6 wherein: the whole supporting handle (6) is in a frustum shape with a large end and a small end.

8. The externally threaded threading device of claim 1 wherein: the length of the guide cylinder (2) is not less than 100 m.

9. An external thread threading method is characterized in that: the method comprises the following steps:

providing a lathe, a workpiece and an external thread threading device, wherein the external thread threading device comprises a die sleeve (1), a guide cylinder (2) and a guide shaft (3), at least one end of the guide cylinder (2) is welded with the die sleeve (1), the inner diameter of the guide cylinder (2) is larger than that of the die sleeve (1), one end of the guide shaft (3) is fixedly connected with a lathe tailstock, the other end of the guide shaft (3) is sleeved in the guide cylinder (2), one end of the workpiece is fixedly connected with a lathe spindle, the lathe is started and the lathe tailstock is pushed, so that an external thread is machined on the outer peripheral surface of the workpiece by the other end of the workpiece and the die sleeve (1) in the sleeving process.

10. A method of threading external threads according to claim 9 wherein: the rotating speed of the lathe spindle does not exceed 5 r/min.

Technical Field

The invention belongs to the technical field of machining process equipment, and particularly relates to an external thread threading device and an external thread threading method.

Background

The threaded connection has been widely used in mechanical equipment and hydraulic pipelines due to its advantages of good self-locking performance, large connection bearing capacity, reliable connection, etc. Present screw thread mainly has two kinds of types of external screw thread and internal thread, wherein the internal thread adopts the screw tap to bore the shaping of attacking usually, and the external screw thread adopts die sleeve mantle silk shaping usually, and generally speaking, adopts the screw tap to bore the comparatively easy shaping of attacking internal thread, and the precision is also higher, however, when adopting die sleeve mantle silk shaping external screw thread, if die sleeve axis produces the deviation with the work piece axial, then can influence external screw thread shaping quality, among the prior art, various external screw thread shaping processing equipment is various, for example, the publication number is: the patent document of "CN 110315150A" discloses an external screw thread mantle fiber instrument, and it includes outer tube, adjustment pipe, clamping ring, coil spring and external screw thread blade, the outside both sides of outer tube are equipped with twist grip, and inside one end is equipped with axial forked tail wedge key, and the other end passes through screw thread and adjustment pipe cooperation, the external screw thread blade is through its forked tail wedge groove sliding sleeve on forked tail wedge key, and the one end top of external screw thread blade is on the adjustment pipe, and the other end top is on the outside clamping ring of outer tube, the coil spring cover is outside the outer tube, and coil spring's one end and clamping ring are connected, and the other end is connected with the holding ring on the outer wall of outer tube. The technical scheme disclosed by the patent document changes the size of the processed thread by adjusting the sliding distance of the external thread blade along the dovetail wedge-shaped key, so that one set of tool can repair or process standard threads and non-standard threads of various specifications, the purchase cost of the tool is saved, the maintenance cost of equipment is reduced, and the maintenance efficiency of the equipment can be improved. However, the technical solution disclosed in this patent document still cannot ensure that the axes of the plate die and the workpiece coincide with each other during threading, and the thread of the external thread is disordered due to excessive trimming times of the external thread, which affects the usability of the external thread workpiece.

Disclosure of Invention

In order to solve the technical problems, the invention provides an external thread threading device and an external thread threading method.

The invention is realized by the following technical scheme.

The invention provides an external thread threading device which comprises a die sleeve, a guide cylinder and a guide shaft, wherein at least one end of the guide cylinder is welded with the die sleeve, the inner diameter of the guide cylinder is larger than that of the die sleeve, and the guide shaft is sleeved in the guide cylinder and can slide along the axial direction of the guide cylinder.

The guide cylinder is characterized in that the outer circumferential surface of the guide cylinder is also provided with a guide hole, the guide shaft is fixedly connected with a rotation stopping pin, and the upper end of the rotation stopping pin extends out of the guide hole.

The rotation stopping pin can be replaced by a bolt.

The projection of the guide hole on the axial section of the guide cylinder is a waist-shaped through hole.

The length of the guide hole is not less than 50 mm.

And the end surface of the outer end of the guide shaft is fixedly connected with a supporting handle.

The whole supporting handle is in a frustum shape with a large end and a small end.

The length of the guide cylinder is not less than 100 m.

In addition, the invention also provides an external thread threading method, which comprises the following steps:

providing a lathe, a workpiece and an external thread threading device, wherein the external thread threading device comprises a die sleeve, a guide cylinder and a guide shaft, at least one end of the guide cylinder is welded with the die sleeve, the inner diameter of the guide cylinder is larger than that of the die sleeve, one end of the guide shaft is fixedly connected with a lathe tailstock, the other end of the guide shaft is sleeved in the guide cylinder, one end of the workpiece is fixedly connected with a lathe spindle, the lathe is started and the tailstock of the workpiece is pushed, and external threads are machined on the outer peripheral surface of the workpiece by the other end of the workpiece and the die sleeve in the sleeving process.

The rotating speed of the lathe spindle does not exceed 5 r/min.

The invention has the beneficial effects that: by adopting the technical scheme of the invention, the guide structure is formed by the guide cylinder and the guide shaft, so that the workpiece and the die sleeve are guided to slide along the central axis of the die sleeve all the time in the process of sleeving the workpiece and the die sleeve, the axial direction of the workpiece and the axial direction of the die sleeve are mutually overlapped, the formed external thread screw thread is prevented from being deflected and disordered, and the forming quality of the external thread threading is improved.

Drawings

Fig. 1 is a schematic structural view of the externally threaded threading device of the present invention.

In the figure: 1-die teeth sleeve, 2-guide cylinder, 3-guide shaft, 4-guide hole, 5-rotation stop pin and 6-support handle.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

As shown in fig. 1, the present invention provides an external thread threading device, which comprises a die sleeve 1, a guide cylinder 2 and a guide shaft 3, wherein at least one end of the guide cylinder 2 is welded with the die sleeve 1, the inner diameter of the guide cylinder 2 is larger than that of the die sleeve 1, and the guide shaft 3 is sleeved in the guide cylinder 2 and enables the guide shaft 3 to slide along the axial direction of the guide cylinder 2.

Furthermore, the outer peripheral surface of the guide cylinder 2 is also provided with a guide hole 4, the guide shaft 3 is fixedly connected with a rotation stopping pin 5, and the upper end of the rotation stopping pin 5 extends out of the guide hole 4. The rotation stop pin 5 may be replaced with a bolt.

In addition, the projection of the guide hole 4 on the axial section of the guide cylinder 2 is a waist-shaped through hole. The length of the guide hole 4 is not less than 50 mm. Therefore, the guide length of the guide structure consisting of the guide cylinder 2 and the guide shaft 3 is longer, and the external thread with the length within 100mm can be conveniently processed.

In addition, the end face of the outer end of the guide shaft 3 is fixedly connected with a supporting handle 6. The support handle 6 is integrally in the shape of a frustum with a large end and a small end. Therefore, the supporting handle 6 can be conveniently clamped on the lathe tailstock, and the length of the guide cylinder 2 is preferably not less than 100 m.

In addition, the external thread threading method is characterized in that: the method comprises the following steps:

the external thread threading device comprises a die sleeve 1, a guide cylinder 2 and a guide shaft 3, wherein at least one end of the guide cylinder 2 is welded with the die sleeve 1, the inner diameter of the guide cylinder 2 is larger than that of the die sleeve 1, one end of the guide shaft 3 is fixedly connected with a lathe tailstock, the other end of the guide shaft 3 is sleeved in the guide cylinder 2, one end of a workpiece is fixedly connected with a lathe spindle, the lathe is started and the tailstock of the workpiece is pushed, and external threads are machined on the outer peripheral surface of the workpiece by the other end of the workpiece and the die sleeve 1 in the sleeving process. Preferably, the rotating speed of the lathe spindle does not exceed 5 r/min.

By adopting the technical scheme of the invention, the guide structure is formed by the guide cylinder and the guide shaft, so that the workpiece and the die sleeve are guided to slide along the central axis of the die sleeve all the time in the process of sleeving the workpiece and the die sleeve, the axial direction of the workpiece and the axial direction of the die sleeve are mutually overlapped, the formed external thread screw thread is prevented from being deflected and disordered, and the forming quality of the external thread threading is improved.