A plug structure for piercing a blank

Abstract

The utility model relates to metal tubular product production technical field especially is a kind of top head structure for blank pipe penetrating, including top head shell, the inside of top head shell is placed with connecting seat, the inside fixed connection of connecting seat has fixed mechanism, the inside movable connection of connecting seat has fixed column, the outside movable connection of fixed column has limiting device.The utility model is provided with fixed mechanism and limiting mechanism, it is favorable to the disassembly of shell body, the shell body placed on seat body is just made the plug block insert fixed groove and fix shell body, and under the action of spring makes the plug post can be inserted into the slot further fixed, and the plug post can be separated from the slot by the activity ring, so that the shell body and seat body can be reversely rotated, and then the plug block can be separated from the fixed groove, so that the shell body can be removed, and the disassembly is more convenient, the shell body is replaced, the top head is not replaced as a whole, and the production cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of metal pipe manufacturing technology, and in particular to a mandrel structure for inserting billets into pipes. Background Technology

[0002] In the hot rolling production of metal tubes, billet piercing is one of the key processing steps. The mandrel, as the core component of the piercing mill, works under high temperature, high pressure and strong friction conditions. Its front end is in direct contact with the billet and needs to withstand extremely high thermal and mechanical loads. It is usually made of high-strength heat-resistant alloy steel by integral forging or casting.

[0003] Most existing mandrels are integral structures. After prolonged use, the working parts of the mandrel wear out significantly. When the wear reaches a certain level, the mandrel needs to be replaced entirely. Due to the high cost of mandrel materials, this method of replacement significantly increases production costs. Summary of the Invention

[0004] In view of this, the present invention provides a mandrel structure for inserting billets into tubes. The main technical problem to be solved is that the production cost is high due to the need to replace the entire mandrel.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a mandrel structure for inserting billets into tubes, comprising a mandrel shell, a connecting seat placed inside the mandrel shell, a fixing mechanism fixedly connected inside the connecting seat, a fixing column movably connected inside the connecting seat, a limiting device movably connected to the outside of the fixing column, the fixing mechanism comprising a fixing frame fixedly connected inside the connecting seat, a screw movably connected inside the fixing frame, a first bevel gear fixedly connected to one end of the screw near the center of the connecting seat, and a plug threaded to the outside of the screw.

[0006] By adopting the above technical solution, during use, the protruding strip is aligned with the groove and moved closer to the seat. As it moves closer, the protruding strip is inserted into the groove. Once fully inserted, the housing is turned, causing the protruding strip to rotate the seat. This rotation of the seat causes the fixing frame to rotate, allowing the first bevel gear to rotate around the second bevel gear. This, in turn, causes the screw to rotate. The screw's rotation causes the insert to move outward and insert into the fixing slot, thus fixing the housing. When the insert is fully inserted into the fixing slot, the position of the insert and the slot aligns. Under the action of the spring, the movable ring can drive the insert to insert into the slot, preventing the seat and housing from rotating. This further ensures the stability of the fixation. When the housing becomes severely worn and needs replacement, the movable ring is moved to disengage the insert from the slot. Turning the housing in the opposite direction causes the seat to rotate in the opposite direction, which in turn causes the screw to rotate in the opposite direction. This allows the insert to disengage from the fixing slot and retract into the seat, allowing the severely worn housing to be removed for replacement with a new one. This eliminates the need to replace the entire top, saving production costs.

[0007] As a further description of the above technical solution: the top shell includes a housing, and the inner side of the housing is provided with a fixing groove and a protruding strip.

[0008] By adopting the above technical solution, the fixing groove is used for the insertion of the plug, and the protrusion and the groove are adapted to position the housing, so that the fixing groove on the inner side of the housing can correspond to the plug.

[0009] As a further description of the above technical solution: the connecting seat includes a seat body placed inside the top shell, the right side of the seat body is provided with a slot, the outer side of the seat body is provided with a groove, and the inside of the seat body is provided with a rotating groove.

[0010] By adopting the above technical solution, the slot is used for the insertion of the plug, and the rotating groove is used for the seat to rotate on the outside of the fixed shaft.

[0011] As a further description of the above technical solution: the limiting device includes a movable ring movably connected to the outside of the fixed column, a spring fixedly connected between the movable ring and the fixed column, an anti-slip groove provided on the outside of the movable ring, and an insert post fixedly connected to the left side of the movable ring.

[0012] By adopting the above technical solution, the movable ring can move on the outside of the column, the spring is in a compressed state, and the insert can move inside the column.

[0013] As a further description of the above technical solution: the fixed column includes a fixed shaft movably connected inside the connecting seat, a second bevel gear is fixedly connected to the outside of the fixed shaft, a column body is fixedly connected to the right end of the fixed shaft, and a threaded groove is provided on the right side of the column body.

[0014] By adopting the above technical solution, the screw groove is used to connect the cylinder to the drilling machine.

[0015] As a further description of the above technical solution: the outer surface of the top shell is provided with a wear-resistant coating, which is a ceramic coating.

[0016] By adopting the above technical solution, the ceramic coating has good wear resistance, which can ensure a longer service life of the top shell.

[0017] By employing the above technical solution, the mandrel structure for inserting billets into tubes according to this utility model has at least the following beneficial effects: Compared with existing technologies, this mandrel structure for inserting blanks into tubes, with its fixing and limiting mechanisms, facilitates the assembly and disassembly of the housing. The protruding strip on the inner side of the housing is inserted into the groove, and rotating the housing causes the base to rotate as well. The rotation of the base causes the screw to move the insert block outwards and insert it into the fixing groove, thus fixing the housing. When the insert block is fully inserted into the fixing groove, the position of the insert post corresponds to the slot. Under the action of the spring, the movable ring can drive the insert post into the slot, preventing the base from rotating and thus the housing from rotating, further ensuring the stability of the fixation. Moving the movable ring allows the insert post to leave the slot, and then twisting the housing in the opposite direction causes the base to rotate in the opposite direction, allowing the insert block to leave the fixing groove and retract into the base. This makes it easy to remove the severely worn housing, facilitating assembly and disassembly and replacement of the housing without requiring the entire mandrel to be replaced, thus saving production costs. Attached Figure Description

[0018] Figure 1 This is a cross-sectional schematic diagram of a mandrel structure for inserting billets according to the present invention. Figure 2 This is a schematic diagram of the overall structure of a mandrel structure for inserting billets according to the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the mandrel shell for inserting billets according to the present invention. Figure 4 This utility model provides a cross-sectional view of the connecting seat and a schematic diagram of the overall structure of the fixing mechanism for a top structure used for inserting blanks into tubes. Figure 5 This is a schematic diagram of the overall structure and the cross-sectional structure of the limiting device and the fixing column of the top structure for inserting billets into tubes proposed in this utility model.

[0019] Legend: 1. Top shell; 101. Shell; 102. Fixing groove; 103. Raised strip; 2. Connecting seat; 201. Seat body; 202. Slot; 203. Groove; 204. Rotary groove; 3. Fixing mechanism; 301. Fixing frame; 302. Insert block; 303. First bevel gear; 304. Screw; 4. Limiting device; 401. Movable ring; 402. Spring; 403. Anti-slip groove; 404. Insert post; 5. Fixing post; 501. Post body; 502. Fixing shaft; 503. Second bevel gear; 504. Screw groove. Detailed Implementation

[0020] Reference Figure 1-5 This utility model provides a mandrel structure for inserting billets into tubes: it includes a mandrel shell 1, a connecting seat 2 placed inside the mandrel shell 1, a fixing mechanism 3 fixedly connected inside the connecting seat 2, a fixing post 5 movably connected inside the connecting seat 2, a limit device 4 movably connected to the outside of the fixing post 5, the fixing mechanism 3 includes a fixing frame 301 fixedly connected inside the connecting seat 2, a screw 304 movably connected inside the fixing frame 301, the screw 304 can rotate inside the fixing frame 301, and a first [unclear - possibly a device or mechanism] is fixedly connected to one end of the screw 304 near the center of the connecting seat 2. A first bevel gear 303 meshes with a second bevel gear 503. A screw 304 has a threaded connection to an insert 302, which can move inside the base 201. The insert 302 is adapted to the fixing groove 102. During use, the protruding strip 103 is aligned with the groove 203 and moved closer to the base 201. By continuously moving closer, the protruding strip 103 is inserted into the groove 203. After full insertion, the housing 101 is turned, causing the protruding strip 103 to rotate the base 201. This rotation of the base 201, in turn, rotates the fixing frame. 301 allows the first bevel gear 303 to rotate around the second bevel gear 503, thereby causing the screw 304 to rotate. The rotation of the screw 304 causes the insert block 302 to move outward and insert into the fixing slot 102, thus fixing the housing 101. When the insert block 302 is fully inserted into the fixing slot 102, the insert post 404 aligns with the slot 202. Under the action of the spring 402, the movable ring 401 drives the insert post 404 to insert into the slot 202, preventing the seat 201 from rotating, and thus fixing the housing 101. The inability to rotate 01 further ensures the stability of the fixed position. When the housing 101 is severely worn due to long-term wear and needs to be replaced, the insert 404 can be disengaged from the slot 202 by moving the movable ring 401. Then, by twisting the housing 101 in the reverse direction, the seat 201 can be rotated in the reverse direction, which in turn causes the screw 304 to rotate in the reverse direction. This allows the insert 302 to leave the fixing slot 102 and retract into the seat 201, so that the severely worn housing 101 can be removed for replacement with a new housing 101. There is no need to replace the entire top head, saving production costs.

[0021] Furthermore, the top shell 1 includes a shell 101. The inner side of the shell 101 is provided with a fixing groove 102 and a protrusion 103. The fixing groove 102 is used for the insertion of the insert 302. The protrusion 103 is adapted to the groove 203 and is used to position the shell 101 so that the fixing groove 102 on the inner side of the shell 101 can correspond to the insert 302.

[0022] Furthermore, the connecting seat 2 includes a seat body 201 placed inside the top housing 1. The right side of the seat body 201 is provided with a slot 202 for inserting the post 404. The outer side of the seat body 201 is provided with a groove 203, and the inside of the seat body 201 is provided with a rotating groove 204 for the seat body 201 to rotate outside the fixed shaft 502.

[0023] Furthermore, the limiting device 4 includes a movable ring 401 movably connected to the outside of the fixed column 5. The movable ring 401 can move to the outside of the column 501. A spring 402 is fixedly connected between the movable ring 401 and the fixed column 5. The spring 402 is in a compressed state. An anti-slip groove 403 is provided on the outside of the movable ring 401. An insert post 404 is fixedly connected to the left side of the movable ring 401. The insert post 404 can move inside the column 501.

[0024] Furthermore, the fixed column 5 includes a fixed shaft 502 movably connected inside the connecting seat 2. A second bevel gear 503 is fixedly connected to the outside of the fixed shaft 502. A column body 501 is fixedly connected to the right end of the fixed shaft 502. A screw groove 504 is provided on the right side of the column body 501. The screw groove 504 is used for the column body 501 to connect with the drilling machine.

[0025] Furthermore, the outer surface of the top shell 1 is provided with a wear-resistant coating, which is a ceramic coating. The ceramic coating has a good wear resistance effect and can ensure a longer service life of the top shell 1.

[0026] Working principle: During use, the protruding strip 103 is aligned with the groove 203 and moved closer to the seat 201. By continuously moving closer, the protruding strip 103 is inserted into the groove 203. Once fully inserted, the housing 101 is turned, causing the protruding strip 103 to rotate the seat 201. This rotation of the seat 201, in turn, causes the fixing frame 301 to rotate, allowing the first bevel gear 303 to rotate around the second bevel gear 503. This, in turn, causes the screw 304 to rotate. The rotation of the screw 304 causes the insert 302 to move outward and insert into the fixing slot 102, thus fixing the housing 101. When the insert 302 is fully inserted into the fixing slot 102, the position of the insert post 404 corresponds to the slot 202, and the spring... The spring 402 causes the movable ring 401 to drive the insert 404 into the slot 202, thus preventing the seat 201 from rotating and the housing 101 from rotating, further ensuring the stability of the fixation. When the housing 101 is severely worn due to long-term wear and needs to be replaced, the movable ring 401 is turned to allow the insert 404 to leave the slot 202. Then, by twisting the housing 101 in the opposite direction, the seat 201 can be rotated in the opposite direction, which in turn causes the screw 304 to rotate in the opposite direction. This allows the insert 302 to leave the fixing groove 102 and retract into the seat 201, so that the severely worn housing 101 can be removed for replacement with a new housing 101 without replacing the entire top, thus saving production costs.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mandrel structure for inserting billets into tubes, comprising a mandrel shell (1), characterized in that: The top shell (1) has a connecting seat (2) inside, a fixing mechanism (3) is fixedly connected inside the connecting seat (2), a fixing column (5) is movably connected inside the connecting seat (2), a limiting device (4) is movably connected to the outside of the fixing column (5), the fixing mechanism (3) includes a fixing frame (301) fixedly connected inside the connecting seat (2), a screw (304) is movably connected inside the fixing frame (301), a first bevel gear (303) is fixedly connected to one end of the screw (304) near the center of the connecting seat (2), and a plug (302) is threadedly connected to the outside of the screw (304).

2. The mandrel structure for inserting billets into tubes according to claim 1, characterized in that: The top shell (1) includes a shell (101), and the inner side of the shell (101) is provided with a fixing groove (102) and a protruding strip (103).

3. The mandrel structure for inserting billets into tubes according to claim 1, characterized in that: The connecting seat (2) includes a seat body (201) placed inside the top shell (1), a slot (202) is provided on the right side of the seat body (201), a groove (203) is provided on the outer side of the seat body (201), and a rotating groove (204) is provided inside the seat body (201).

4. The mandrel structure for inserting billets into tubes according to claim 1, characterized in that: The limiting device (4) includes a movable ring (401) movably connected to the outside of the fixed post (5), a spring (402) fixedly connected between the movable ring (401) and the fixed post (5), an anti-slip groove (403) is provided on the outside of the movable ring (401), and an insert post (404) is fixedly connected to the left side of the movable ring (401).

5. A mandrel structure for inserting billets into tubes according to claim 1, characterized in that: The fixed column (5) includes a fixed shaft (502) movably connected inside the connecting seat (2). A second bevel gear (503) is fixedly connected to the outside of the fixed shaft (502). A column body (501) is fixedly connected to the right end of the fixed shaft (502). A threaded groove (504) is provided on the right side of the column body (501).

6. The mandrel structure for inserting billets into tubes according to claim 1, characterized in that: The outer surface of the top shell (1) is provided with a wear-resistant coating, which is a ceramic coating.

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