Thread turning clamp for special-shaped rotating pipe joint

Abstract

The invention discloses a special-shaped rotary pipe joint turning thread clamp which comprises a mandrel and a positioning shaft, one end of the mandrel is provided with a clamping part used for clamping of a clamping jaw of a lathe, the positioning shaft is fixed to the mandrel, the end, with a through hole, of a to-be-machined rotary pipe joint is fixed to the positioning shaft, and the end, with threads to be machined, of the rotary pipe joint extends out of the mandrel. The axis of the to-be-machined thread end of the rotary pipe joint coincides with the axis of the clamping part. The clamp is reasonable in structure, stable in positioning, safe, reliable and high in operability.

Description

Technical Field

[0001] The invention belongs to the technical field of tooling fixtures and relates to a thread turning fixture for a special-shaped rotary pipe joint. Background Art

[0002] The special-shaped rotating pipe joint has the following typical features: 1. The pipe joint is not a complete rotating body, one end of which is flat and has a through hole; 2. The other end of the rotating pipe joint has a threaded structure, which is also the part to be processed. Figure 1 , Figure 2 The two-dimensional diagram of the rotating pipe joint shown in the figure, in order to process the size of Ф10, M12X1-6h on the lathe, it is necessary to clamp the flat outer arc surface ( Figure 1 , Figure 2 The Ф16 surface shown in the figure) cannot usually be directly clamped and processed on a lathe. This is because the three jaws on the lathe are required for clamping. The three-jaw clamping fixes the workpiece by radial movement of the three jaws. The clamping surface of the swivel pipe joint is a flat surface, which cannot be clamped by the three jaws.

[0003] Generally, there are two methods for processing external threads of rotary pipe joints: manual processing with die, processing on lathe or milling machine. The traditional method of processing external threads of rotary pipe joints is to fix the rotary pipe joints on a vise, and the processing personnel use die to process them. This method consumes a lot of time and manpower, and has low production efficiency. Special-shaped pipe joints cannot be clamped directly on lathes, and cutting processing cannot be achieved. Summary of the invention

[0004] Purpose of the invention: In order to solve the problem that special-shaped rotary pipe joints cannot be clamped on a lathe, the present invention provides a thread turning fixture for special-shaped rotary pipe joints.

[0005] The technical solution of the present invention:

[0006] A clamp for turning threads of a special-shaped rotary pipe joint comprises a core shaft and a positioning shaft. One end of the core shaft has a clamping portion for clamping with claws of a lathe. The positioning shaft is fixed on the core shaft. One end of the rotary pipe joint to be processed with a through hole is fixed on the positioning shaft. One end of the rotary pipe joint to be processed with threads extends out of the core shaft. After clamping, the axis of the end of the rotary pipe joint to be processed with threads coincides with the axis of the clamping portion.

[0007] Preferably, the core shaft has a groove for arranging the positioning shaft.

[0008] Preferably, two opposite surfaces of the positioning shaft are interference fit with corresponding side walls of the groove.

[0009] Preferably, the cylindrical protrusion on the upper portion of the positioning shaft passes through the through hole of the rotary pipe joint and is tightened by three screws connected to the positioning shaft.

[0010] Preferably, the outer circle of the cylindrical protrusion on the upper part of the positioning shaft is transitionally matched with the through hole of the rotary pipe joint.

[0011] Preferably, two opposite side surfaces of the shaft neck of the rotary pipe joint are clamped at two end surfaces by two screws threadedly connected to the core shaft.

[0012] Preferably, the protrusion at the lower part of the positioning shaft extends into the hole at the bottom of the groove, and the protrusion and the hole at the bottom of the groove are interference fit.

[0013] Preferably, a light hole connected to the threaded hole for connecting screw three is formed on the bottom surface of the positioning shaft.

[0014] Preferably, the axis of the light hole coincides with the axis of the threaded hole for connecting screw three.

[0015] Preferably, a gasket is arranged between the positioning shaft and the screw three.

[0016] The main advantages of the present invention are: the fixture has a reasonable structure, stable positioning, safety and reliability, strong operability, improved on-site processing efficiency, better guarantee of product quality and production nodes, greatly saving repair costs, and achieving better economic benefits. This fixture realizes the function of processing flat-mouth special-shaped rotary pipe joints on a lathe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a swivel pipe joint.

[0018] Figure 2 yes Figure 1 AA section view.

[0019] Figure 3 This is the front view of the mandrel.

[0020] Figure 4 yes Figure 3 A-direction view.

[0021] Figure 5 yes Figure 3 Top view of the .

[0022] Figure 6 It is a top view of the positioning axis.

[0023] Figure 7 yes Figure 6 AA section view.

[0024] Figure 8 It is a schematic diagram of clamping a swivel pipe joint.

[0025] Fig. 9 yes Figure 8 A-direction view.

[0026] Fig.10yes Figure 8 Top view of the .

[0027] In the figure: 1-core shaft, 2-positioning shaft, 3-nut, 4-screw 1, 5-screw 2, 6-screw 3, 7-washer. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and its working principle.

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] The features of various aspects of the embodiments of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to fully understand the present invention. However, it is obvious to those skilled in the art that the present invention can also be implemented without these specific details. The following description of the embodiments is only for a better understanding of the present invention by illustrating examples of the present invention. The present invention is not limited to any specific settings and methods provided below, but covers all product structures, any improvements, replacements, etc. of methods covered without departing from the spirit of the present invention.

[0031] In the various drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring the present invention.

[0032] A clamp for turning threads of a special-shaped rotating pipe joint comprises a mandrel 1 and a positioning shaft 2. One end of the mandrel 1 has a clamping portion for clamping with a lathe claw, and the clamping portion is a cylindrical structure. The positioning shaft 2 is fixed in a groove in the middle of the mandrel 1, and the bottom of the groove is a horizontal plane. The upper part of the positioning shaft 2 passes through a through hole at one end of a flat shape of a special-shaped rotating pipe joint to be processed with threads, and is threadedly connected to the positioning shaft 2 through a screw three 6. The flat bottom surface of the special-shaped rotating pipe joint to be processed with threads is supported by a horizontal plane of the top surface in the middle of the positioning shaft 2. A washer 7 is arranged between the screw three 6 and the top surface of the positioning shaft 2, and the special-shaped rotating pipe joint to be processed with threads is fixed by the screw three 6. The other end of the special-shaped rotating pipe joint to be processed with threads extends out of the mandrel 1, and the two opposite sides of the cylindrical shaft neck in the middle of the special-shaped rotating pipe joint to be processed with threads are tightened by the ends of the screw two 5 on the mandrel 1. The screw two 5 is threadedly connected to a nut 3, and the nut 3 is used to prevent loosening. After clamping, the axis of the threaded end of the special-shaped rotary pipe joint coincides with the axis of the clamping part.

[0033] The cylinder at the lower part of the positioning shaft 2 extends into the through hole at the bottom of the groove in the middle part of the core shaft 1 and is interference fit.

[0034] In order to facilitate the centering of the special-shaped rotating pipe joint to be processed with threads, a light hole is opened on the bottom surface of the positioning shaft 2, and the axis of the light hole coincides with the axis of the threaded hole for connecting the screw 3 6 at the top. The light hole can be used for exhaust.

[0035] When in use, by replacing different positioning shafts 2, the rotary pipe joints with different through-hole inner diameters can be positioned and then processed.

[0036] In this embodiment, when in use, the size of the positioning shaft φ12+0.034+0.023mm is inserted into the hole φ12+0.0180mm of the mandrel. Figure 1 The inner hole of the special-shaped pipe joint shown is installed with the positioning shaft φ10-0.013-0.022mm, the plane of the special-shaped pipe joint is in contact with the step of the positioning shaft, the screw is inserted into the hole of the pipe joint, and connected with the internal thread of the positioning shaft 2, and the pipe joint is tightened. At the same time, the screw is passed through the threaded hole on the mandrel to tighten the rotating pipe joint, thereby clamping the pipe joint. During turning, the three-claw clamps the outer circle of the clamping part of the mandrel φ300-0.021mm to realize the turning of the internal thread of the rotating pipe joint. After the processing on the lathe is completed, only the three-claw on the lathe needs to be loosened, the tooling is removed, and the screws are loosened to remove the rotating pipe joint.

Claims

1. A thread turning fixture for a special-shaped rotating pipe joint, characterized in that: The invention comprises a core shaft (1) and a positioning shaft (2). One end of the core shaft (1) is provided with a clamping portion for clamping with a claw of a lathe. The positioning shaft (2) is fixed on the core shaft (1). One end of a rotary pipe joint to be processed with a through hole is fixed on the positioning shaft (2). One end of the rotary pipe joint with a thread to be processed extends out of the core shaft (1). After clamping, the axis of the end of the rotary pipe joint with a thread to be processed coincides with the axis of the clamping portion.

2. A thread turning fixture for a special-shaped rotary pipe joint according to claim 1, characterized in that: The core shaft (1) is provided with a groove for arranging a positioning shaft (2).

3. A thread turning fixture for a special-shaped rotary pipe joint as claimed in claim 2, characterized in that: The two opposite surfaces of the positioning shaft (2) are interference fit with the corresponding side walls of the groove.

4. A thread turning fixture for a special-shaped rotary pipe joint as claimed in claim 2, characterized in that: The cylindrical protrusion on the upper part of the positioning shaft (2) passes through the through hole of the rotating pipe joint and is tightened by screw three (6) connected to the positioning shaft (2).

5. A thread turning fixture for a special-shaped rotary pipe joint as claimed in claim 4, characterized in that: The outer circle of the cylindrical protrusion on the upper part of the positioning shaft (2) is transitionally matched with the through hole of the rotating pipe joint.

6. A thread turning fixture for a special-shaped rotary pipe joint as claimed in claim 1, characterized in that: Two opposite side surfaces of the shaft neck of the rotating pipe joint are clamped by two end surfaces of two screws (5) threadedly connected to the core shaft (1).

7. A thread turning fixture for a special-shaped rotary pipe joint as claimed in claim 2, characterized in that: The protrusion at the lower part of the positioning shaft (2) extends into the hole at the bottom of the groove, and the protrusion and the hole at the bottom of the groove are interference fit.

8. A thread turning fixture for a special-shaped rotary pipe joint as claimed in claim 4, characterized in that: The bottom surface of the positioning shaft (2) is provided with a light hole connected to a threaded hole for connecting a screw three (6).

9. A thread turning fixture for a special-shaped rotary pipe joint as claimed in claim 8, characterized in that: The axis of the smooth hole coincides with the axis of the threaded hole used for connecting screw three (6).

10. A thread turning fixture for a special-shaped rotary pipe joint as claimed in claim 4, characterized in that: A gasket is arranged between the positioning shaft (2) and the screw three (6).

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