Pipe expander die for producing stainless steel lined composite pipe

Abstract

The utility model provides a pipe expander die for producing a stainless steel lined composite pipe. The pipe expanding machine die for producing the stainless steel lined composite pipe comprises a mounting disc, the top of the mounting disc is fixedly connected with a fixing disc, the top of the fixing disc is provided with inner expansion sliding blocks which are evenly distributed, and the outer bottom ends of the inner expansion sliding blocks are fixedly connected with a positioning plate; a second extrusion block penetrates through and is slidably connected to the middle of the exterior of the internal expansion sliding block, a first extrusion block penetrates through and is slidably connected to the bottom end of the interior of the internal expansion sliding block, the bottom of the first extrusion block makes contact with the second extrusion block, and a telescopic rod penetrates through and is fixedly connected to the top end of the interior of the internal expansion sliding block. The pipe expanding machine die for producing the stainless steel lined composite pipe has the advantages that the space between the stainless steel pipe and the internal expansion sliding block is filled, the stainless steel pipe and the internal expansion sliding block are aligned, positioned and fixed, and the pipe expanding precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stainless steel composite pipe production technology, in particular to a pipe expansion machine die for producing lined stainless steel composite pipes. Background Art

[0002] Stainless steel composite pipe is a new material made of stainless steel and carbon structural steel by non-destructive pressure synchronous compounding. It has the corrosion resistance, wear resistance and excellent appearance of stainless steel, as well as the good bending strength and impact resistance of carbon steel. In the production process of stainless steel composite pipe, pipe expansion mold is needed to expand the stainless steel composite pipe.

[0003] In the prior art, when expanding the stainless steel composite pipe, one end of the stainless steel pipe is put on the outside of the inner expansion slider, and the inclined wedge moves under the traction of the cylinder to move the inner expansion slider outward, thereby expanding the stainless steel pipe. However, after the stainless steel pipe is inserted into the inner expansion slider, the inner wall of the stainless steel cannot be completely and neatly contacted with the outside of the inner expansion slider, so that a gap is left between the stainless steel pipe and the inner expansion slider, resulting in reduced accuracy of pipe expansion.

[0004] Therefore, it is necessary to provide a new tube expander mold for producing lined stainless steel composite tubes to solve the above technical problems. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a tube expanding machine die for producing lined stainless steel composite tubes, which can fill the gap between a stainless steel tube and an inner expansion slider, align, position and fix the stainless steel tube and the inner expansion slider, and improve the tube expanding accuracy.

[0006] In order to solve the above technical problems, the utility model provides a pipe expansion machine mold for producing lined stainless steel composite pipes, including a mounting plate, a fixing plate is fixedly connected to the top of the mounting plate, a uniformly distributed inner expansion slider is arranged on the top of the fixing plate, a positioning plate is fixedly connected to the outer bottom end of the inner expansion slider, a second extrusion block is penetrated through the middle of the outer part of the inner expansion slider and is slidably connected, a first extrusion block is penetrated through the inner bottom end of the inner expansion slider and is slidably connected, and the bottom of the first extrusion block is in contact with the second extrusion block, a telescopic rod is penetrated through and fixedly connected to the inner top end of the inner expansion slider, a second spring is sleeved on the outer part of the telescopic rod, and one end of the second spring is penetrated through and fixedly connected to the inner expansion slider, a support plate is fixedly connected to the end of the telescopic rod opposite to the inner expansion slider, and the support plate is fixedly connected to the other end of the second spring.

[0007] Preferably, a slide groove is provided on the top of the fixed plate, and a reset component is arranged inside the slide groove.

[0008] Preferably, the reset assembly includes a fixed rod, one end of the fixed rod passes through a slide groove and is fixedly connected to a fixed plate, an outer inner end of the fixed rod is sleeved with a first spring, and one end of the first spring passes through the slide groove and is fixedly connected to the fixed plate, a sliding plate passes through and is slidably connected to the middle of the outer portion of the fixed rod, and the sliding plate is fixedly connected to the other end of the first spring.

[0009] Preferably, a plug-in block is fixedly connected to the bottom of the inner expansion sliding block, and the plug-in block penetrates and is slidably connected to the sliding plate, and a T-shaped sliding groove is provided on the inner side of the inner expansion sliding block.

[0010] Preferably, a connecting rod is passed through and slidably connected to the bottom of the fixed plate, a bevel is fixedly connected to the top of the connecting rod, six T-shaped sliding blocks are fixedly connected to the outer side of the bevel, and the T-shaped sliding blocks are passed through and slidably connected to the T-shaped slots.

[0011] Preferably, a connecting piece is fixedly connected to the bottom end of the connecting rod.

[0012] Preferably, evenly distributed screw holes are provided on the periphery of the top of the mounting plate.

[0013] Compared with the related art, the pipe expansion machine mold for producing lined stainless steel composite pipes provided by the utility model has the following beneficial effects:

[0014] 1. The utility model provides a tube expansion machine die for producing lined stainless steel composite pipes. First, through the cooperation of the positioning plate, the support plate, the telescopic rod, the second spring, the first extrusion block and the second extrusion block, when the stainless steel pipe is inserted into the inner expansion slider, the bottom end of the stainless steel pipe contacts the arc surface outside the second extrusion block and is extruded downward until the bottom end of the stainless steel pipe contacts the bottom inside the positioning plate. The second extrusion block moves toward the inside of the inner expansion slider due to the downward extrusion of the stainless steel pipe, and the movement of the second extrusion block drives the first extrusion block. The support plate moves upward and squeezes the support plate. Since the side of the support plate that contacts the first extrusion block is inclined, the support plate moves outward as the first extrusion block rises, thereby contacting the inner wall of the stainless steel pipe and filling the gap between the stainless steel pipe and the inner expansion slider. The second spring applies a pulling force inward to the support plate, so that the support plate squeezes the first extrusion block at the same time and drives it to squeeze downward, so that the second extrusion block can also move outward at the same time, thereby clamping the stainless steel pipe, so that the stainless steel pipe can be expanded accurately.

[0015] 2. The utility model provides a tube expansion machine mold for producing lined stainless steel composite pipes. Through the cooperation of the slide groove, fixed rod, sliding plate, first spring and plug-in block, after the expansion of the stainless steel tube is completed, the inclined wedge slides downward, and after the inclined wedge loses the limit with the inner expansion slider, the first spring releases the tension, thereby driving the sliding plate to slide inward. Since the plug-in block arranged at the bottom of the inner expansion slider penetrates the sliding plate, the inner expansion slider will move inward with the movement of the sliding plate, thereby realizing automatic resetting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a preferred embodiment of a tube expander die for producing lined stainless steel composite tubes provided by the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of a portion of the structure shown;

[0018] Figure 3 for Figure 1 An enlarged schematic diagram of a portion of the structure shown;

[0019] Figure 4 for Figure 3 The schematic diagram of the partial cross-sectional structure shown;

[0020] Figure 5 for Figure 1 A schematic cross-sectional view of a portion of the structure shown;

[0021] Figure 6 for Figure 1 An enlarged schematic diagram of part of the structure is shown.

[0022] Numbers in the figure: 1. Mounting plate; 2. Fixed plate; 3. Inner expansion slider; 4. Positioning plate; 5. Support plate; 6. Connecting rod; 7. Connecting piece; 8. Oblique wedge; 9. T-shaped sliding block; 10. T-shaped slide groove; 11. Slide groove; 12. Fixed rod; 13. Sliding plate; 14. Screw hole; 15. First spring; 16. Plug-in block; 17. Telescopic rod; 18. Second spring; 19. First extrusion block; 20. Second extrusion block. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0024] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 ,in, Figure 1A schematic structural diagram of a preferred embodiment of a tube expander die for producing lined stainless steel composite tubes provided by the utility model; Figure 2 for Figure 1 A schematic diagram of a portion of the structure shown; Figure 3 for Figure 1 An enlarged schematic diagram of a portion of the structure shown; Figure 4 for Figure 3 The schematic diagram of the partial cross-sectional structure shown; Figure 5 for Figure 1 A schematic cross-sectional view of a portion of the structure shown; Figure 6 for Figure 1A tube expansion machine mold for producing lined stainless steel composite pipes includes a mounting plate 1, a fixing plate 2 is fixedly connected to the top of the mounting plate 1, a uniformly distributed inner expansion slider 3 is arranged on the top of the fixing plate 2, a positioning plate 4 is fixedly connected to the outer bottom end of the inner expansion slider 3, a second extrusion block 20 is penetrated and slidably connected to the middle of the outer part of the inner expansion slider 3, a first extrusion block 19 is penetrated and slidably connected to the inner bottom end of the inner expansion slider 3, and the bottom of the first extrusion block 19 is in contact with the second extrusion block 20, a telescopic rod 17 is penetrated and fixedly connected to the inner top end of the inner expansion slider 3, and the outer sleeve of the telescopic rod 17 is provided with The second spring 18 is provided, and one end of the second spring 18 penetrates and is fixedly connected with the inner expansion slider 3. The end of the telescopic rod 17 opposite to the inner expansion slider 3 is fixedly connected with the support plate 5, and the support plate 5 is fixedly connected with the other end of the second spring 18. When the inner expansion slider 3 is inserted into the inclined wedge 8 and is about to contact the fixed plate 2, the plug-in block 16 provided at the bottom of the inner expansion slider 3 is inserted into the top of the sliding plate 13, so that the inner expansion slider 3 is connected with the sliding plate 13. After the mounting plate 1 is installed on the pipe expanding machine, the mounting plate 1 and the fixed plate 2 are fixed by bolts penetrating the first spring 15. After the fixing is completed, , the connecting piece 7 provided at the bottom of the connecting rod 6 is installed and connected with the hydraulic cylinder, so that the hydraulic cylinder can drive the inclined wedge 8 to move up and down. When expanding the pipe, the stainless steel pipe is first inserted into the inner expansion slider 3. After insertion, the bottom end of the stainless steel pipe contacts the arc surface of the outer side of the second extrusion block 20 and is squeezed downward until the bottom end of the stainless steel pipe contacts the inner bottom of the positioning plate 4. Since the outer side of the second extrusion block 20 is arc-shaped, the second extrusion block 20 is squeezed downward by the stainless steel pipe, thereby moving toward the inside of the inner expansion slider 3, and the movement of the second extrusion block 20 will drive the second extrusion block 20 to move downward. An extrusion block 19 moves upward and squeezes the support plate 5. Since the side of the support plate 5 that contacts the first extrusion block 19 is inclined, the support plate 5 moves outward as the first extrusion block 19 rises, thereby contacting the inner wall of the stainless steel pipe and filling the gap between the stainless steel pipe and the inner expansion slider 3. The second spring 18 applies a pulling force inward to the support plate 5, so that the support plate 5 squeezes the first extrusion block 19 at the same time and drives it to squeeze downward, so that the second extrusion block 20 can also move outward at the same time, thereby clamping the stainless steel pipe.

[0025] A slide groove 11 is provided on the top of the fixed plate 2, and a reset component is provided inside the slide groove 11, which can enable the inner expansion slider 3 to automatically reset after the work is completed.

[0026] The reset assembly includes a fixed rod 12, one end of which passes through the slide groove 11 and is fixedly connected to the fixed plate 2, a first spring 15 is sleeved on the outer inner end of the fixed rod 12, and one end of the first spring 15 passes through the slide groove 11 and is fixedly connected to the fixed plate 2, a sliding plate 13 passes through and is slidably connected to the middle of the outer portion of the fixed rod 12, and the sliding plate 13 is fixedly connected to the other end of the first spring 15, after the hydraulic cylinder drives the inclined wedge 8 to move downward, the inner expansion slider 3 loses its limit, so that the first spring 15 releases the tension, drives the sliding plate 13 and the inner expansion slider 3 to move, thereby realizing the automatic reset of the inner expansion slider 3.

[0027] A plug-in block 16 is fixedly connected to the bottom of the inner-expanding slider 3, and the plug-in block 16 penetrates and is slidably connected to the sliding plate 13. A T-shaped slide groove 10 is provided on the inner side of the inner-expanding slider 3. When the inner-expanding slider 3 is inserted into the inclined wedge 8 and is about to contact the fixed plate 2, the plug-in block 16 set at the bottom of the inner-expanding slider 3 is inserted into the top of the sliding plate 13, thereby connecting the inner-expanding slider 3 to the sliding plate 13.

[0028] A connecting rod 6 is passed through and slidably connected to the bottom of the fixed plate 2, and a beveled wedge 8 is fixedly connected to the top of the connecting rod 6. Six T-shaped sliding blocks 9 are fixedly connected to the outer side of the beveled wedge 8, and the T-shaped sliding blocks 9 are passed through and slidably connected to the T-shaped sliding groove 10. When in use, first align the T-shaped sliding groove 10 on the inner side of the inner expansion slider 3 with the T-shaped sliding block 9 outside the beveled wedge 8, and insert the inner expansion slider 3 from above the T-shaped sliding block 9, so that the inner expansion slider 3 is installed on the beveled wedge 8 and can slide.

[0029] The bottom end of the connecting rod 6 is fixedly connected with a connecting piece 7, which facilitates the connection between the connecting rod 6 and the inclined wedge 8 and the hydraulic cylinder.

[0030] The top periphery of the mounting plate 1 is provided with evenly distributed screw holes 14, so that after the mounting plate 1 and the device as a whole are mounted on the pipe expander, bolts are passed through the mounting plate 1 to connect with the pipe expander, thereby fixing the device as a whole on the pipe expander.

[0031] The working principle of the tube expander die for producing lined stainless steel composite tubes provided by the utility model is as follows:

[0032] First, when in use, align the T-shaped slide groove 10 on the inner side of the inner expansion slider 3 with the T-shaped sliding block 9 on the outside of the inclined wedge 8, and insert the inner expansion slider 3 from above the T-shaped sliding block 9, so that the inner expansion slider 3 is installed on the inclined wedge 8 and can slide. When the inner expansion slider 3 is inserted into the inclined wedge 8 and is about to contact the fixed plate 2, the plug-in block 16 provided at the bottom of the inner expansion slider 3 is inserted into the top of the sliding plate 13, so that the inner expansion slider 3 is connected to the sliding plate 13, and the mounting plate 1 is installed on the pipe expander, and the mounting plate 1 and the fixed plate 2 are fixed by bolts penetrating the first spring 15. After completion, the connecting piece 7 provided at the bottom of the connecting rod 6 is installed and connected with the hydraulic cylinder, so that the hydraulic cylinder can drive the inclined wedge 8 to move up and down. When expanding the pipe, the stainless steel pipe is first inserted into the inner expansion slider 3. After insertion, the bottom end of the stainless steel pipe contacts the arc surface of the outer side of the second extrusion block 20 and is squeezed downward until the bottom end of the stainless steel pipe contacts the inner bottom of the positioning plate 4. Since the outer side of the second extrusion block 20 is arc-shaped, the second extrusion block 20 is squeezed downward by the stainless steel pipe, thereby moving toward the inside of the inner expansion slider 3, and the movement of the second extrusion block 20 will drive the first extrusion block 20 to move downward. The pressing block 19 moves upward and squeezes the support plate 5. Since the side of the support plate 5 that contacts the first squeezing block 19 is inclined, the support plate 5 moves outward as the first squeezing block 19 rises, thereby contacting the inner wall of the stainless steel pipe and filling the gap between the stainless steel pipe and the inner expansion slider 3. The second spring 18 applies a pulling force to the support plate 5 to move inward, so that the support plate 5 squeezes the first squeezing block 19 at the same time and drives it to squeeze downward, so that the second squeezing block 20 can also move outward at the same time, thereby clamping the stainless steel pipe. After the clamping is completed, The hydraulic cylinder drives the connecting rod 6 and the inclined wedge 8 to move upward, so that the inner expansion slider 3 expands outward at the same time, and drives the sliding plate 13 and the first spring 15 to move and extend outward, thereby realizing the expansion of the stainless steel pipe. After the expansion is completed, it is only necessary to take out the stainless steel pipe so that the support plate 5 and the second extrusion block 20 are reset by the action of the second spring 18. After the hydraulic cylinder drives the inclined wedge 8 to move downward, the inner expansion slider 3 loses its limit, so that the first spring 15 releases the tension, driving the sliding plate 13 and the inner expansion slider 3 to move, thereby realizing the automatic reset of the inner expansion slider 3.

[0033] Compared with the related art, the pipe expansion machine mold for producing lined stainless steel composite pipes provided by the utility model has the following beneficial effects:

[0034] The utility model provides a tube expansion machine mold for producing lined stainless steel composite pipes. First, through the cooperation of the positioning plate 4, the support plate 5, the telescopic rod 17, the second spring 18, the first extrusion block 19 and the second extrusion block 20, when the stainless steel pipe is inserted into the inner expansion slider 3, the bottom end of the stainless steel pipe contacts the arc surface outside the second extrusion block 20 and is extruded downward until the bottom end of the stainless steel pipe contacts the bottom inside the positioning plate 4. The second extrusion block 20 moves toward the inside of the inner expansion slider 3 due to the downward extrusion of the stainless steel pipe, and the movement of the second extrusion block 20 drives the first extrusion block 20 to move downward. 19 moves upward and squeezes the support plate 5. Since the side of the support plate 5 that contacts the first extrusion block 19 is inclined, the support plate 5 moves outward as the first extrusion block 19 rises, thereby contacting the inner wall of the stainless steel pipe and filling the gap between the stainless steel pipe and the inner expansion slider 3. The second spring 18 applies a pulling force inward to the support plate 5, so that the support plate 5 squeezes the first extrusion block 19 at the same time and drives it to squeeze downward, so that the second extrusion block 20 can also move outward at the same time, thereby clamping the stainless steel pipe, so that the stainless steel pipe can be accurately expanded.

[0035] The utility model provides a tube expansion machine mold for producing lined stainless steel composite tubes. Through the cooperation of the slide groove 11, the fixed rod 12, the sliding plate 13, the first spring 15 and the plug-in block 16, after the expansion of the stainless steel tube is completed, the inclined wedge 8 slides downward, and after the inclined wedge 8 loses the limit between the inclined wedge 8 and the inner expansion slider 3, the first spring 15 releases the tension, thereby driving the sliding plate 13 to slide inwardly. Since the plug-in block 16 arranged at the bottom of the inner expansion slider 3 penetrates the sliding plate 13, the inner expansion slider 3 is driven to move inwardly with the movement of the sliding plate 13, thereby realizing automatic resetting.

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A tube expander die for producing a lined stainless steel composite tube, comprising a mounting plate, characterized in that: The top of the mounting plate is fixedly connected to a fixing plate, the top of the fixing plate is provided with an evenly distributed inner expansion slider, the outer bottom end of the inner expansion slider is fixedly connected to a positioning plate, the outer middle of the inner expansion slider is penetrated by and slidably connected to a second extrusion block, the inner bottom end of the inner expansion slider is penetrated by and slidably connected to a first extrusion block, and the bottom of the first extrusion block is in contact with the second extrusion block, the inner top end of the inner expansion slider is penetrated by and fixedly connected to a telescopic rod, the outer side of the telescopic rod is sleeved with a second spring, and one end of the second spring is penetrated by and fixedly connected to the inner expansion slider, the end of the telescopic rod opposite to the inner expansion slider is fixedly connected to a support plate, and the support plate is fixedly connected to the other end of the second spring.

2. The tube expander mold for producing lined stainless steel composite tubes according to claim 1, characterized in that: A slide groove is provided on the top of the fixed plate, and a reset component is arranged inside the slide groove.

3. The tube expander mold for producing lined stainless steel composite tubes according to claim 2, characterized in that: The reset assembly includes a fixed rod, one end of which passes through a slide groove and is fixedly connected to a fixed plate, a first spring is sleeved on the outer inner end of the fixed rod, and one end of the first spring passes through the slide groove and is fixedly connected to the fixed plate, a sliding plate passes through and is slidably connected to the middle of the outer part of the fixed rod, and the sliding plate is fixedly connected to the other end of the first spring.

4. The tube expander mold for producing lined stainless steel composite tubes according to claim 1, characterized in that: A plug-in block is fixedly connected to the bottom of the inner expansion sliding block, and the plug-in block penetrates and is slidably connected to the sliding plate. A T-shaped sliding groove is provided on the inner side of the inner expansion sliding block.

5. The tube expander mold for producing lined stainless steel composite tubes according to claim 1, characterized in that: A connecting rod is passed through and slidably connected to the bottom of the fixed plate, a bevel is fixedly connected to the top of the connecting rod, six T-shaped sliding blocks are fixedly connected to the outer side of the bevel, and the T-shaped sliding blocks are passed through and slidably connected to the T-shaped sliding grooves.

6. The tube expander die for producing lined stainless steel composite tubes according to claim 5, characterized in that: The bottom end of the connecting rod is fixedly connected with a connecting piece.

7. The tube expander mold for producing lined stainless steel composite tubes according to claim 1, characterized in that: The top periphery of the installation plate is provided with evenly distributed screw holes.

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