Solid inner die device for cold-drawn pipe

Abstract

The utility model discloses a solid inner die device for a cold-drawn pipe, which belongs to the technical field of cold-drawn pipes, and comprises a core rod, the end part of the core rod is rotatably connected with a solid inner die, the core rod comprises a front rod, a middle rod and a tail rod, the end part of the middle rod is in threaded connection with the inside of the tail rod, and the end part of the middle rod is in threaded connection with the inside of the tail rod. A front rod is slidably connected to the interior of the middle rod, a connecting rod is fixedly connected to the end of the front rod, a sliding block is fixedly connected to the outer surface of the connecting rod, internal threads are arranged on the inner side wall of the middle rod and the inner side wall of the tail rod, and a first external thread and a second external thread are arranged on the outer surface of the connecting rod. And the first external thread and the second external thread respectively correspond to the internal thread in the middle rod and the internal thread in the tail rod in position. And through arrangement of a connecting rod, a sliding block, a first external thread and a second external thread, the practicability of the device is improved, and through arrangement of a connector and a mounting groove, the convenience of replacement of the solid inner mold is improved.

Description

Technical Field

[0001] The utility model relates to the field of cold-drawn tubes, in particular to a solid inner mold device for cold-drawn tubes. Background Art

[0002] Cold drawn steel pipe is a type of steel pipe, that is, it is classified according to different production processes. Different from hot rolled (expanded) pipes, it is made through multiple cold drawing processes during the process of expanding the diameter of the rough pipe billet or raw pipe. Due to the constraints of existing processes, the diameter and length of cold drawn pipes are limited.

[0003] The existing cold-drawn tube solid inner mold device uses a solid inner mold to connect with a core rod when in use, so that the core rod performs cold drawing on the inner wall of the cold-drawn tube. However, the length of the core rod is fixed and cannot be flexibly adjusted, which affects the use of the device. Therefore, a cold-drawn tube solid inner mold device is provided. Utility Model Content

[0004] (1) Technical problems solved

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a solid inner mold device for cold-drawn tubes.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a solid inner mold device for a cold-drawn tube, comprising a core rod, the end of the core rod being rotatably connected to a solid inner mold, the core rod comprising a front rod, a middle rod and a tail rod, a slide groove being provided inside the tail rod, the end of the middle rod being connected to the internal thread of the tail rod, the interior of the middle rod being slidably connected to the front rod, the end of the front rod being fixedly connected to a connecting rod, the outer surface of the connecting rod being fixedly connected to a slider, and the slider is fitted with the inner side wall of the slide groove, the inner side walls of the middle rod and the tail rod are both provided with internal threads, the outer surface of the connecting rod is provided with a first external thread and a second external thread, and the first external thread and the second external thread respectively correspond to the positions of the internal threads of the middle rod and the internal threads of the tail rod.

[0008] Preferably, the first external thread and the second external thread are located on both sides of the slider, and the distance from the second external thread to the slider is longer than the distance from the first external thread to the slider.

[0009] Preferably, one end of the front rod away from the connecting rod is threadedly connected to a connector, a mounting groove is provided inside the connector, and the end of the solid inner mold is located inside the mounting groove.

[0010] Preferably, the end of the front rod away from the connecting rod and the outer surface of the connecting head are both provided with anti-slip grooves, and the connecting head is located on the left side of the front rod.

[0011] Preferably, the connecting rod and the sliding block are both located inside the tail rod, and the positions of the connecting rod correspond to those of the middle rod.

[0012] Preferably, the middle rod is located between the tail rod and the front rod, and the end of the front rod is located inside the tail rod and the middle rod.

[0013] (3) Beneficial effects

[0014] 1. A cold-drawn tube solid inner mold device is provided with a connecting rod, a slider, a first external thread and a second external thread. When in use, the front rod is rotated counterclockwise, and the connecting rod is driven to rotate by the front rod, so that the first external thread is separated from the internal thread inside the tail rod. When the slider is gradually displaced toward the middle rod, when the connecting rod contacts the middle rod, the front rod is rotated clockwise, so that the second external thread is connected to the internal thread inside the middle rod. As the second external thread continues to rotate, the front rod gradually extends toward the outside of the middle rod, thereby adjusting the length of the entire core rod, which is beneficial to improving the practicality of the device.

[0015] 2. This cold-drawn tube solid inner mold device is provided with a connecting head and an installation groove. When in use, the solid inner mold is prone to wear. The connecting head is rotated to separate it from the front rod, so that the solid inner mold can be removed and replaced, which is conducive to enhancing the convenience of replacing the solid inner mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a solid inner mold device for cold-drawn tubes;

[0017] Figure 2 This is a schematic diagram of the internal structure of a solid inner mold device for a cold-drawn tube from a first perspective;

[0018] Figure 3 A schematic diagram of the internal structure of a solid inner mold device for a cold-drawn tube from a second perspective;

[0019] Figure 4 A solid inner mold device for cold drawn tubes Figure 3 Enlarged view of point A in the middle.

[0020] In the figure: 1. solid inner mold; 2. core rod; 201. tail rod; 202. middle rod; 203. front rod; 204. slider; 205. first external thread; 206. second external thread; 207. slide groove; 208. internal thread; 209. connector; 210. mounting groove; 211. connecting rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 efforts are within the scope of protection of the present invention.

[0022] See also Figures 1-4 The utility model provides a technical solution: a solid inner mold device for cold-drawn tubes, including a core rod, the end of the core rod 2 is rotatably connected to the solid inner mold 1, the core rod 2 includes a front rod 203, a middle rod 202 and a tail rod 201, a slide groove 207 is opened inside the tail rod 201, the end of the middle rod 202 is connected to the internal thread of the tail rod 201, the interior of the middle rod 202 is slidably connected to the front rod 203, the end of the front rod 203 is fixedly connected to the connecting rod 211, the outer surface of the connecting rod 211 is fixedly connected to the slider 204, and the slider 204 is fitted with the inner side wall of the slide groove 207, the inner side walls of the middle rod 202 and the tail rod 201 are both provided with internal threads 208, the outer surface of the connecting rod 211 is provided with a first external thread 205 and a second external thread 206, and the first external thread 205 and the second external thread 206 respectively correspond to the positions of the internal threads 208 of the middle rod 202 and the internal threads 208 of the tail rod 201. When in use, the front rod 203 is rotated counterclockwise, and the front rod 203 is used to drive the connecting rod 211 to rotate, so that the first external thread 205 is separated from the internal internal thread 208 of the tail rod 201. When the slider 204 gradually moves toward the middle rod 202, when the connecting rod 211 contacts the middle rod 202, the front rod 203 is rotated clockwise, so that the second external thread 206 is connected to the internal internal thread 208 of the middle rod 202. As the second external thread 206 continues to rotate, the front rod 203 gradually extends toward the outside of the middle rod 202, thereby adjusting the length of the overall core rod 2, which is beneficial to improving the practicality of the device.

[0023] The first external thread 205 and the second external thread 206 are located on both sides of the slider 204, and the distance from the second external thread 206 to the slider 204 is longer than the distance from the first external thread 205 to the slider 204. The distance from the second external thread 206 to the slider 204 corresponds to the length of the internal thread 208 inside the center rod 202, and the distance from the first external thread 205 to the slider 204 corresponds to the length of the internal thread 208 inside the tail rod 201.

[0024] The end of the front rod 203 away from the connecting rod 211 is threadedly connected to a connector 209. A mounting slot 210 is provided inside the connector 209, and the end of the solid inner mold 1 is located within the mounting slot 210. The solid inner mold 1 is prone to wear during use. By rotating the connector 209 to separate it from the front rod 203, the solid inner mold can be removed and replaced, which helps to enhance the convenience of solid inner mold replacement.

[0025] The outer surface of the front rod 203 away from one end of the connecting rod 211 and the connector 209 is provided with anti-skid lines, and the connector 209 is located on the left side of the front rod 203. The anti-skid lines are used to facilitate the rotation of the connector 209.

[0026] The connecting rod 211 and the slider 204 are both located inside the tail rod 201, and the position of the connecting rod 211 corresponds to the position of the middle rod 202. The two ends of the connecting rod 211 are respectively threadedly connected to the tail rod 201 through the first external thread 205 and to the middle rod 202 through the second external thread 206, thereby changing the position of the connecting rod 211.

[0027] The middle rod 202 is located between the tail rod 201 and the front rod 203, and the end of the front rod 203 is located inside the tail rod 201 and the middle rod 202. The middle rod 202 and the tail rod 201 are threadedly connected, and the front rod 203 is displaced inside the tail rod 201 and the middle rod 202, thereby changing the length of the front rod 203 extending outward.

[0028] Working principle: When in use, rotate the front rod 203 counterclockwise, and use the front rod 203 to drive the connecting rod 211 to rotate, so that the first external thread 205 is separated from the internal internal thread 208 of the tail rod 201, so that the slider 204 can slide quickly inside the slide groove 207 until the connecting rod 211 contacts the middle rod 202, and then rotate the front rod 203 clockwise to connect the second external thread 206 with the internal internal thread 208 of the middle rod 202. As the second external thread 206 continues to rotate, the front rod 203 gradually extends toward the outside of the middle rod 202, thereby adjusting the length of the overall core rod 2, which is beneficial to improving the practicality of the device. The solid inner mold 1 is prone to wear. When the solid inner mold 1 needs to be replaced, the rotating connector 209 is separated from the front rod 203, so that the solid inner mold 1 can be removed and replaced, which is beneficial to enhancing the convenience of replacing the solid inner mold 1.

[0029] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A cold drawn tube solid inner mold device, comprising a core rod (2), characterized in that: The end of the core rod (2) is rotatably connected to the solid inner mold (1), and the core rod (2) comprises a front rod (203), a middle rod (202) and a tail rod (201). A sliding groove (207) is provided inside the tail rod (201). The end of the middle rod (202) is connected to the inner thread of the tail rod (201). The inner part of the middle rod (202) is slidably connected to the front rod (203). The end of the front rod (203) is fixedly connected to a connecting rod (211). The outer surface of the connecting rod (211) is fixedly connected to the front rod (203). A slider (204) is connected, and the slider (204) fits with the inner wall of the slide groove (207), the inner walls of the middle rod (202) and the tail rod (201) are both provided with internal threads (208), and the outer surface of the connecting rod (211) is provided with a first external thread (205) and a second external thread (206), and the first external thread (205) and the second external thread (206) respectively correspond to the positions of the internal internal thread (208) of the middle rod (202) and the internal internal thread (208) of the tail rod (201).

2. A cold drawn tube solid inner mold device according to claim 1, characterized in that: The first external thread (205) and the second external thread (206) are located on both sides of the slider (204), and the distance from the second external thread (206) to the slider (204) is longer than the distance from the first external thread (205) to the slider (204).

3. The cold-drawn tube solid inner mold device according to claim 2, characterized in that: One end of the front rod (203) away from the connecting rod (211) is threadedly connected to a connector (209), an installation groove (210) is provided inside the connector (209), and the end of the solid inner mold (1) is located inside the installation groove (210).

4. A cold drawn tube solid inner mold device according to claim 3, characterized in that: The end of the front rod (203) away from the connecting rod (211) and the outer surface of the connecting head (209) are both provided with anti-slip lines, and the connecting head (209) is located on the left side of the front rod (203).

5. The cold-drawn tube solid inner mold device according to claim 4, characterized in that: The connecting rod (211) and the sliding block (204) are both located inside the tail rod (201), and the connecting rod (211) corresponds to the position of the middle rod (202).

6. The cold-drawn tube solid inner mold device according to claim 5, characterized in that: The middle rod (202) is located between the tail rod (201) and the front rod (203), and the end of the front rod (203) is located inside the tail rod (201) and the middle rod (202).

Images