Hydraulic roll-forming auxiliary tool for pipe joint raised head

Abstract

The invention discloses a pipe joint raised head hydraulic roll forming assistive device which comprises a die and a roll forming assistive device, and the die comprises an upper die and a lower die; the upper die and the lower die are spliced into an annular structure, and an annular groove with an arc-shaped section is formed in the inner wall of the annular structure; the roll forming assistive device comprises an assistive device body, an adjusting screw rod and a pressure head. The auxiliary tool body is rod-shaped, a plurality of pressure head holes are formed in the front end of the auxiliary tool body, the axes of the pressure head holes are arranged in the radius direction of the auxiliary tool body, and the pressure head holes are located in the same plane. A pressure head is arranged in each pressure head hole, and a ball head is arranged at the outer end of each pressure head; an oil hole communicated with the pressure head hole and the rear end is formed in the center of the auxiliary tool body; the rear diameter of the oil hole is larger than the front diameter, and the rear end of the oil hole is provided with threads which are in threaded connection with the adjusting screw. And the part between the adjusting screw rod and the pressure head in the oil hole is filled with hydraulic oil. The device is simple in structure and convenient to operate, and can be used for manufacturing the raised heads outdoors.

Description

Technical Field

[0001] The invention provides a hydraulic rolling auxiliary tool for a pipe joint boss. Background Art

[0002] In the production of hydraulic metal pipe parts, the process of making bulge heads is relatively complicated, the equipment is highly specialized, and the operating technology is relatively difficult.

[0003] For the production of hydraulic metal pipe mouth bulge convex heads in non-professional production workshops (such as Figure 1 When engineering equipment working in the field breaks down and needs to replace the hydraulic metal pipe, it is basically impossible to make the bulge head, which affects the efficiency of the engineering equipment. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a hydraulic rolling auxiliary tool for pipe joint bosses which has simple results, is easy to operate and can be used to make bosses in the field.

[0005] The technical solution adopted by the present invention is: a hydraulic rolling aid for a pipe joint convex head, comprising a mold and a rolling aid, the mold comprising an upper mold and a lower mold; the upper mold and the lower mold are assembled into an annular structure, and an annular groove with an arc-shaped cross-section is provided on the inner wall of the annular structure; the rolling aid comprises an auxiliary body, an adjusting screw and a pressure head; the auxiliary body is rod-shaped, and a plurality of pressure head holes are provided at the front end of the auxiliary body, and the axis of the pressure head hole is arranged along the radial direction of the auxiliary body, and the pressure head holes are located in the same plane; a pressure head is provided in each pressure head hole, and the outer end of the pressure head is a ball head; an oil hole connecting the pressure head hole and the rear end is provided at the center of the auxiliary body; the rear diameter of the oil hole is larger than the front diameter, and a thread is provided at the rear end of the oil hole, and the thread is threadedly connected to the adjusting screw; the part between the adjusting screw and the pressure head in the oil hole is filled with hydraulic oil.

[0006] Furthermore, the upper die and the lower die are semi-annular structures, two locating pins are arranged on the joint surface of the upper die, and two locating pin holes are arranged on the joint surface of the lower die; the two locating pins are respectively inserted into the two locating pin holes.

[0007] Furthermore, two pressure head holes are provided at the front end of the auxiliary body, and the two pressure head holes are coaxial.

[0008] Furthermore, the radius of the ball head of the pressure head is equal to the inner radius of the arc section of the bulge to be processed; the radius of the arc section of the annular groove of the mold is equal to the outer radius of the arc section of the bulge to be processed.

[0009] Furthermore, the pressure head is made of hard alloy.

[0010] Compared with the prior art, the present invention has the following beneficial effects: The invention has a simple structure and low cost. When the invention is used, it only needs to place one end of the round tube in the mold, insert the front end of the auxiliary body from the round tube into the annular groove of the mold, and then screw in the adjusting screw to extend the pressure head and rotate the mold to realize the molding of the bulge head. The operation is convenient. Moreover, the invention can be operated on-site during field work, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the drum convex head used for production of the present invention.

[0012] Figure 2 It is a structural diagram of the present invention.

[0013] Figure 3 It is a structural diagram of a mold of the present invention.

[0014] Figure 4 It is a structural diagram of the mold of the present invention when it is opened.

[0015] Figure 5 It is a structural diagram of a rolling auxiliary tool of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] like Figure 2-5 As shown, the present invention includes a mold 1 and a rolling auxiliary tool 2, wherein the mold 1 includes an upper mold 11 and a lower mold 12; the upper mold 11 and the lower mold 12 are assembled into an annular structure, and an annular groove 13 with an arc-shaped cross section is provided on the inner wall of the annular structure. The upper mold 11 and the lower mold 12 are semi-annular structures, and two locating pins 14 are provided on the assembled surface of the upper mold 11, and two locating pin holes 15 are provided on the assembled surface of the lower mold 12; the two locating pins 14 are respectively inserted into the two locating pin holes 15 to realize the assembly of the upper mold and the lower mold. The radius of the arc section of the annular groove 13 of the mold 1 is equal to the outer radius Φ of the arc section of the processing drum convex head.

[0018] The rolling auxiliary tool 2 includes an auxiliary body 21, an adjusting screw 22 and a pressure head 23; the auxiliary body 21 is rod-shaped, and two pressure head holes 24 are provided at the front end of the auxiliary body 21 (the number of pressure head holes 24 is not limited to two, and can be one or more than two), and the two pressure head holes 24 are coaxially arranged, and the axis of the pressure head hole 24 is arranged along the radial direction of the auxiliary body 21 (when there are multiple pressure head holes 24, the pressure head holes 24 are located in the same plane). A pressure head 23 is provided in each pressure head hole 24, and the outer end of the pressure head 23 is a ball head; the radius of the ball head of the pressure head 23 is equal to the inner radius of the arc section of the convex head to be processed. The pressure head is made of cemented carbide and has good wear resistance. An oil hole 25 connecting the pressure head hole and the rear end is provided at the center of the auxiliary body; the rear diameter of the oil hole 25 is larger than the front diameter, and the rear end of the oil hole 25 is provided with a thread, and the thread is screwed with the adjusting screw 22. The part between the adjusting screw 22 and the pressure head 23 in the oil hole 25 is filled with hydraulic oil.

Claims

1. A hydraulic rolling aid for a pipe joint boss, characterized by: It includes a mold and a rolling aid, the mold includes an upper mold and a lower mold; the upper mold and the lower mold are assembled into an annular structure, and an annular groove with an arc-shaped cross-section is provided on the inner wall of the annular structure; the rolling aid includes an auxiliary body, an adjusting screw and a pressure head; the auxiliary body is rod-shaped, and a plurality of pressure head holes are provided at the front end of the auxiliary body, and the axis of the pressure head holes is arranged along the radial direction of the auxiliary body, and the pressure head holes are located in the same plane; a pressure head is provided in each pressure head hole, and the outer end of the pressure head is a ball head; an oil hole connecting the pressure head hole and the rear end is provided at the center of the auxiliary body; the rear diameter of the oil hole is larger than the front diameter, and a thread is provided at the rear end of the oil hole, and the thread is screwed to the adjusting screw; the part between the adjusting screw and the pressure head in the oil hole is filled with hydraulic oil.

2. The pipe joint boss hydraulic rolling aid according to claim 1 is characterized in that: The upper die and the lower die are semi-annular structures. Two locating pins are arranged on the joint surface of the upper die, and two locating pin holes are arranged on the joint surface of the lower die; the two locating pins are respectively inserted into the two locating pin holes.

3. The pipe joint boss hydraulic rolling aid according to claim 1 is characterized in that: The front end of the auxiliary body is provided with two pressure head holes, and the two pressure head holes are coaxial.

4. The pipe joint boss hydraulic rolling aid according to claim 1 is characterized in that: The radius of the ball head of the pressure head is equal to the inner radius of the arc section of the bulging head to be processed; the radius of the arc section of the annular groove of the mold is equal to the outer radius of the arc section of the bulging head to be processed.

5. The pipe joint boss hydraulic rolling aid according to claim 1 is characterized in that: The pressure head is made of hard alloy.

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