Titanium bent pipe forming die

Abstract

The titanium bent pipe forming die comprises a die body, a forming groove is formed in the die body, the forming groove is provided with a straight pipe section and a bent section, a driving rod is axially arranged in the straight pipe section in a penetrating mode, a forming blank of a bent pipe is a straight pipe, and oblique openings are formed in the two ends of the straight pipe. A positioning component for circumferentially positioning the straight pipe is arranged on the other side, opposite to the driving rod, of the straight pipe to be formed, and the positioning component can deform along with the bent section under the action of external force. The positioning component is connected with the bevel opening of the straight pipe, so that the straight pipe is positioned when being placed, and the problem that the straightness of a formed pipe opening is affected due to circumferential deflection of the bevel opening of the straight pipe when the straight pipe is placed is solved. Furthermore, positioning columns are arranged, positioning is achieved from the two sides of the straight pipe, and the defect that in the driving process of the straight pipe, the straight pipe is circumferentially deflected again after being separated from the rubber columns or the positioning columns is overcome.

Description

Technical Field

[0001] This application relates to the technical field of titanium elbow forming, and particularly relates to a titanium elbow forming die. Background Art

[0002] Titanium elbows are used for connecting straight pipes during pipeline laying. At the same time, due to the good corrosion resistance of titanium, titanium elbows are widely used in the field of conveying corrosive liquids such as chemical industry and petroleum.

[0003] Currently, when forming titanium elbows, it can be formed through a die. As Figure 3 shown, it includes a die body (lower die) with a forming groove thereon. The forming groove has a straight pipe section and a bending section, and a driving rod is axially penetrated in the straight pipe section. When operating to form a straight pipe into an elbow, the straight pipe is placed in the straight pipe section of the forming groove. As Figure 3 shown, there is also an upper die (not shown in the figure) on the upper side of the die body. The straight pipe is covered in the forming groove, and then the driving rod penetrates into the straight pipe section and drives the straight pipe to move from the straight pipe section of the forming groove towards the bending section. When entering the bending section, the straight pipe bends and deforms. As Figure 3 shown, after the straight pipe completely enters the bending section, the formed elbow is obtained. After the upper die moves upward, the formed elbow is taken out to complete an elbow forming operation.

[0004] When forming a straight pipe into an elbow, due to different amounts of deformation on the inner and outer sides of the pipe body, for example, the inner side of the formed elbow will be squeezed, while the outer side will have stretching of the pipe wall, which will cause the pipe orifices to be uneven. Therefore, to solve the problem that the pipe orifices of the formed elbow are uneven due to different amounts of deformation on the inner and outer sides of the pipe body, as Figure 1-2 shown, inclined openings are provided on both sides of the straight pipe, so as to ensure the flatness of the pipe orifices after bending and forming.

[0005] When performing the operation of elbow forming, the straight pipe is usually placed by an operator. Due to the existence of the inclined openings, when the straight pipe is placed into the straight pipe section, the circumferential deflection of the inclined openings will occur, as Figure 4 shown by the arrow in the figure. Therefore, there will still be a defect that the ports of the formed elbow are uneven, affecting the quality of the pipe orifices after elbow forming. Summary of the Invention

[0006] Aiming at the above problems, this application aims to provide a titanium elbow forming die, which realizes the positioning of the straight pipe during placement by connecting with the inclined openings of the straight pipe through a positioning member, avoiding the problem that the circumferential deflection of the inclined openings of the straight pipe affects the flatness of the pipe orifices after forming.

[0007] To achieve the above object, the technical solution adopted in the present application is as follows: A titanium elbow forming die includes a die body with a forming groove thereon. The forming groove has a straight pipe section and a bending section. A driving rod axially penetrates through the straight pipe section. The forming blank of the elbow is a straight pipe, and inclined openings are provided at both ends of the straight pipe. It is characterized in that: A positioning member for circumferentially positioning the straight pipe is provided on the other side of the straight pipe to be formed opposite to the driving rod, and the positioning member can deform with the bending section under the action of an external force.

[0008] Preferably, the positioning member is a rubber column with one end flatly attached to the inclined opening.

[0009] Preferably, a positioning column that is horizontally hinged to the end of the driving rod and abuts against the inclined opening on the other side of the straight pipe is provided.

[0010] Preferably, the outer diameter of the positioning column is between the inner and outer diameters of the straight pipe.

[0011] The beneficial effect of the present application is that: The present application realizes the positioning of the straight pipe during placement by connecting the positioning member with the inclined opening of the straight pipe, avoiding the problem that the circumferential deflection of the inclined opening of the straight pipe affects the flatness of the pipe orifice after forming during placement. Further, by providing a positioning column, positioning is achieved from both sides of the straight pipe, avoiding the drawback that the straight pipe circumferentially deflects again after detaching from the rubber column or the positioning column during the process of driving it forward. Description of the Drawings

[0012] Figure 1 It is a structural diagram of a straight pipe with a bend.

[0013] Figure 2 It is a structural diagram of the formed elbow.

[0014] Figure 3 It is a diagram showing the process of bending the straight pipe.

[0015] Figure 4 It is a diagram showing the circumferential deflection of the straight pipe after placement.

[0016] Figure 5 It is a diagram showing the circumferential deflection of the straight pipe limited by the rubber column in the present application.

[0017] Figure 6 It is a diagram showing the circumferential deflection of the straight pipe limited by the positioning column in the present application.

[0018] Figure 7 It is a diagram showing the positioning column in the present application pushing the straight pipe into the bending section.

[0019] Figure 8 It is a physical diagram of the straight pipe in the present application.

[0020] Figure 9 It is a diagram of the formed elbow in the present application.

[0021] In the figure: 5a - straight pipe; 5b - bent pipe. Specific embodiments

[0022] In order to enable those of ordinary skill in the art to better understand the technical solution of the present application, the technical solution of the present application will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Referring to Figures 1 to 7 A titanium bent pipe forming die as shown, including a die body 1, which has a forming groove. The forming groove has a straight pipe section 1a and a bending section 1b. A driving rod 2 is axially inserted through the straight pipe section 1a; the forming blank of the bent pipe is a straight pipe, and inclined openings are provided at both ends of the straight pipe. When operating to form a straight pipe into a bent pipe, the straight pipe is placed in the straight pipe section 1a of the forming groove. As Figure 3 shown, there is also an upper die on the upper side of the die body 1 to cover the straight pipe in the forming groove. Then, the driving rod 2 penetrates into the straight pipe section 1a and drives the straight pipe to move from the straight pipe section 1a of the forming groove towards the bending section 1b. When entering the bending section 1b, the straight pipe bends and deforms. As Figure 3 shown, after the straight pipe completely enters the bending section 1b, the bent pipe is formed.

[0024] In order to solve the problem that the ports of the finally formed bent pipes are not flush due to the circumferential deflection of the inclined openings when the straight pipes are manually placed at present. As Figure 5 shown, the present application is provided with a positioning member for circumferentially positioning the straight pipe on the other side of the straight pipe to be formed opposite to the driving rod 2. By connecting the positioning member with the inclined opening of the straight pipe, the positioning of the straight pipe during placement is realized, and the problem that the circumferential deflection of the inclined opening of the straight pipe affects the flatness of the pipe orifice after forming is avoided.

[0025] Since the positioning member needs to enter the bending section 1b under the drive of the straight pipe, the positioning member can deform with the bending section 1b under the action of an external force, avoiding jamming of the positioning member in the bending section 1b.

[0026] Specifically, as Figure 5 shown, the positioning member is a rubber column 3 with one end flat against the inclined opening, that is, one end of the rubber column 3 is also an inclined opening structure. The side wall of the rubber column 3 and the straight pipe section 1a and the bending section 1b are preferably an axially sliding structure of key and keyway, so as to realize the circumferential positioning of the rubber column 3. After the circumferential positioning of the rubber column 3, the straight pipe is placed in the straight pipe section 1a and its inclined opening is flat against one end of the rubber column 3, so as to realize the circumferential positioning of the straight pipe. Then, when driving the straight pipe to bend, the rubber column 3 deforms and enters the bending section 1b. When the straight pipe enters the bending section 1b and realizes partial bending, the circumferential rotation of the straight pipe is restricted again, and the straight pipe is continuously driven by the driving rod 2 to complete the bending operation.

[0027] Since the rubber column 3 has the characteristic of bending in the bending section 1b, when the straight pipe rotates circumferentially, it will drive the rubber column 3 to have a certain circumferential deformation (end face torsion). Therefore, to avoid this problem, as Figure 6 shown, a positioning column 4 that is horizontally hinged to the end of the driving rod 2 and abuts against the inclined opening on the other side of the straight pipe is provided. The positioning column 4 is preferably made of metal. During the driving process of the driving rod 2, the positioning column 4 abuts against the inclined opening of the straight pipe, further defining the accuracy of the placement position of the straight pipe, and can effectively limit the problem that the straight pipe rotates in the straight pipe section 1a due to surface roughness during the axial movement. When the straight pipe completely enters the bending section 1b, as Figure 7 shown, the tail end of the straight pipe will deflect. Therefore, through the hinged structure of the positioning column 4 and the driving rod 2, the positioning column 4 always abuts against the tail end of the straight pipe in a flat manner. When the tail end of the straight pipe enters the bending section 1b, a bent pipe can be formed, as Figure 7 shown. Therefore, the positioning column 4 does not completely enter the bent pipe section 1b, and thus there will be no problem of travel interference.

[0028] To avoid the problem that the front end of the positioning column 4 gets stuck when it contacts the inner wall of the bending section 1b due to the deflection of the positioning column 4 after entering the bending section 1b with the straight pipe, as Figure 7 shown, preferably, the outer diameter of the positioning column 4 is between the inner and outer diameters of the straight pipe, that is, the outer diameter of the positioning column 4 is smaller than the inner diameter of the bending section 1b. After the front end of the positioning column 4 enters the bending section 1b with the straight pipe, the positioning column 4 can achieve a certain angular deflection to push the straight pipe completely into the bending section 1b. And the outer diameter of the positioning column 4 being between the inner and outer diameters of the straight pipe enables the end of the positioning column 4 to contact the end face of the straight pipe and drive the straight pipe to move forward.

[0029] The principle of this application is as follows: When forming a bent pipe from a straight pipe, the straight pipe is placed in the straight pipe section 1a of the forming groove. Then, a rubber column 3 is closely attached to the end face of the straight pipe on one side of the bending section 1b to position the placement position of the straight pipe. Then, the driving rod 2 penetrates into the straight pipe section 1a, and the positioning column 4 hinged to its end abuts against the inclined opening on the other side of the straight pipe, further positioning the placement of the straight pipe. At the same time, by positioning from both sides of the straight pipe, the drawback that the straight pipe circumferentially deflects again after detaching from the rubber column 3 or the positioning column 4 during the driving process is avoided. The driving rod 2 further drives the straight pipe to move from the straight pipe section 1a of the forming groove towards the bending section 1b. When it enters the bending section 1b, the straight pipe bends and deforms, the rubber column 3 deforms and bends in the bending section 1b, and the positioning column 4 rotates along with the tail end of the straight pipe. When the straight pipe completely enters the bending section 1b, a bent pipe is formed.

[0030] The basic principles, main features and advantages of the present application have been shown and described above. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and all such changes and improvements fall within the scope of the present application claimed.

Claims

1. A titanium elbow forming die, comprising a die body (1), on which there is a forming groove. The forming groove has a straight pipe section (1a) and a bending section (1b). A driving rod (2) is axially penetrated in the straight pipe section (1a); the forming blank of the elbow is a straight pipe, and inclined openings are provided at both ends of the straight pipe. It is characterized in that: On the other side of the straight pipe to be formed, which is opposite to the driving rod (2), there is a positioning member for circumferentially positioning the straight pipe, and the positioning member can deform with the bending section (1b) under the action of an external force.

2. The elbow forming die according to claim 1, characterized in that: The positioning member is a rubber column (3) with one end flat against the inclined opening.

3. The elbow forming die according to claim 2, characterized in that: At the end of the driving rod (2), a positioning column (4) that is in contact with the inclined opening on the other side of the straight pipe is horizontally hinged.

4. The elbow forming die according to claim 3, wherein: The outer diameter of the positioning column (4) is between the inner diameter and the outer diameter of the straight pipe.

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