A stainless steel pipe cold expanding device

Abstract

The present application relates to a kind of stainless steel pipe cold expanding equipment, to solve the current existing stainless steel pipe cold expanding equipment by artificial loading and unloading, the technical problem of lower operating efficiency, including pipe expanding frame body, combination mechanism, auxiliary mechanism, positioning mechanism, adjusting mechanism, inner diameter adjusting cylinder and pipe expanding mechanism.The present application is placed in the stainless steel pipe in the placing cavity by the auxiliary mechanism of inclination, to make the cylindrical shape of stainless steel pipe can be relied on itself, self-sliding to the output end of placing cavity, cooperate combination mechanism to carry out the convex lifting processing after stainless steel pipe, and the first stainless steel pipe in the output end of placing cavity is lifted up, sliding to the engagement cavity, realize automatic continuous material removal and feeding work, without artificial loading and unloading work, to improve the operating efficiency of pipe expanding processing loading and unloading.

Description

Technical Field

[0001] This invention relates to the field of stainless steel pipe processing technology, and in particular to a cold expansion device for stainless steel pipes. Background Technology

[0002] Stainless steel pipe is a hollow, long, round steel material, widely used in industrial pipelines for petroleum, chemical, medical, food, light industry, and machinery, as well as mechanical structural components. Expansion is a processing method that relies on the stretching of material to expand a hollow part or pipe blank with a small diameter outward in the radial direction. Expansion is a metallurgical term, a pressure processing technology that uses hydraulic or mechanical force to expand the steel pipe radially outward. Currently, stainless steel pipes are used as the main channel in fluid transportation pipelines. The purpose of cold expansion in fluid processing is to expand one end of the stainless steel pipe to form a larger end that fits against the outer wall, thus fitting the expanded end of the stainless steel pipe. This is then combined with sealing components to seal the joint gaps. The specific connection method varies depending on the actual installation, and the required shape for expansion differs. The two most common shapes are cylindrical and frustum-shaped.

[0003] Current stainless steel pipe cold expansion equipment relies on manual loading and unloading, resulting in low operating efficiency. Therefore, it is particularly important to propose a high-efficiency stainless steel pipe cold expansion equipment with continuous loading and unloading function. In view of this, we propose a stainless steel pipe cold expansion equipment. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art, adapt to practical needs, and provide a stainless steel pipe cold expansion device to solve the technical problem of low operating efficiency caused by manual loading and unloading of existing stainless steel pipe cold expansion devices.

[0005] To achieve the objective of this invention, the technical solution adopted by this invention is as follows: design a stainless steel pipe cold expansion device, including an expansion frame, a combination mechanism, an auxiliary mechanism, a positioning mechanism, an adjustment mechanism, an inner diameter adjustment cylinder, and an expansion mechanism;

[0006] The expansion frame includes a processing cavity formed by internal gaps, a combined mechanism arranged within the processing cavity, an auxiliary mechanism extending from the bottom of the expansion frame to the outside of the processing cavity, and a placement cavity formed by internal gaps of the auxiliary mechanism. The placement cavity is inclined. A positioning mechanism is arranged above the processing cavity via a transverse beam. The positioning mechanism and the combined mechanism form a locking cavity, which connects to the output end of the placement cavity to form a loading / unloading channel. The positioning mechanism is a movable convex structure, capable of controlling the connection and disconnection of the loading / unloading channel. An adjustment mechanism is inserted inside the positioning mechanism and connected to the expansion frame. An inner diameter adjustment cylinder is inserted into one side of the expansion frame and connected to the processing cavity. An expansion mechanism is arranged on the pushing end of the inner diameter adjustment cylinder, and the expansion mechanism is a spiral expansion structure. This invention utilizes an inclined auxiliary mechanism to allow the stainless steel tube placed in the placement cavity to slide automatically to the output end of the placement cavity based on its cylindrical shape. This, in conjunction with a combination mechanism, protrudes and lifts the processed stainless steel tube, and assists in lifting the first stainless steel tube at the output end of the placement cavity and sliding it into the locking cavity. This achieves automated continuous unloading and loading operations, eliminating the need for manual loading and unloading, thereby improving the operational efficiency of tube expansion processing.

[0007] Preferably, the combined mechanism includes a base, a cantilever block, a first positioning and pressing block, a stripping cylinder, a combined plate, a stripping top block, and a discharge top block;

[0008] The base is located at the bottom of the processing cavity, the cantilever block is fixed at the top of the base, the first positioning and pressing block is located at the top of the cantilever block, and the cantilever block has a raised groove extending to the upper end of the first positioning and pressing block. The first positioning and pressing block has a first slot. The ejector cylinder is located on one side of the cantilever block via a mounting base. The combination plate is located at the top of the ejector cylinder. At least one ejector top block is located on one side of the top of the combination plate. The ejector top block is raised and lowered in conjunction with the first positioning and pressing block via the combination plate. The upper side of the ejector top block has a guide groove, which consists of an arc groove adapted to the first slot and an inclined groove. At least one unloading top block is located on the other side of the top of the combination plate. A single ejector cylinder lifts and lowers the ejector and discharge blocks on the combined plate. During this lifting operation, the stainless steel pipe is positioned at the first end of the placement cavity output. When the ejector cylinder's stroke is complete, the discharge block pushes the stainless steel pipe out. Simultaneously, the ejector block rises to eject the processed stainless steel pipe. The inclined groove allows the stainless steel pipe to slide directionally and disengage from the locking cavity. Under the height difference between the first positioning pressing block and the first end of the placement cavity output, the rising discharge block causes the stainless steel pipe to roll naturally into the locking cavity. The loading and unloading of the stainless steel pipe is achieved through the operation of a single ejector cylinder. The overall structure is simple and easy to install and manufacture.

[0009] Preferably, the auxiliary mechanism includes a connecting frame and a support frame;

[0010] The invention comprises a connecting frame located on one side of the unloading cylinder, a support frame located on top of the connecting frame, and the support frame consisting of several inclined trays connected together. The output end of the support frame has a linkage feeding groove that cooperates with the feeding top block. This invention uses several inclined trays connected in a Z-shape to place stainless steel pipes. It relies primarily on the cylindrical shape of the pipes themselves, allowing them to roll, to lay the stainless steel pipes flat in the placement cavity. The height difference between the output end of the placement cavity and the first positioning pressing block limits the movement of the stainless steel pipes. The linkage feeding groove at the output end of the placement cavity allows the feeding top block to pass through. When the feeding operation is complete, the feeding top block descends to below the output end of the placement cavity based on the return stroke of the unloading cylinder. At this time, the second stainless steel pipe rolls to the first position at the output end of the placement cavity, ready for the next feeding operation. The overall structure is simple, the auxiliary mechanism has low production costs, and it mainly relies on the cylindrical shape of the inclined trays and the rolling nature of the pipes themselves, eliminating the need for an adaptation control device and greatly reducing manufacturing costs.

[0011] Preferably, the positioning mechanism includes a pressing cylinder and a second positioning pressing block;

[0012] The pressing cylinder is positioned on top of the first positioning pressing block, and the second positioning pressing block is positioned at the pushing end of the pressing cylinder. A second slot is formed at the bottom of the second positioning pressing block. This invention uses the second positioning pressing block in conjunction with the pressing cylinder's stroke to contact the first positioning pressing block, thereby limiting the movement of the stainless steel pipe rolling into the locking cavity. Simultaneously, an adjustment mechanism is used to prevent displacement of the stainless steel pipe during processing.

[0013] Preferably, the adjustment mechanism includes a limit seat, an adjustment motor, a shaft, and a rubber wheel;

[0014] The limiting seat is fixed to the extension end of the second positioning pressing block and connected to the pipe expansion frame. The adjusting motor passes through the limiting seat, and the shaft is arranged on the rotating end of the adjusting motor via a coupling. Several rubber wheels are arranged linearly and at equal intervals on the shaft. This invention uses a stripping cylinder to eject the stripping top block with a relatively short stroke for the long path of stripping operation, thereby loosening the stainless steel pipe from the first positioning pressing block. The adjusting motor drives multiple rubber wheels to rotate, allowing the stainless steel pipe to rotate and adjust its angle to meet the needs of multi-directional pipe expansion.

[0015] Preferably, the tube expanding mechanism includes a push connecting seat, bevel gear A, drive motor, bevel gear B, tube expanding head, expanding block, columnar drive shaft, hollow top shaft, top shaft, and ring spring;

[0016] The push connecting seat is bolted to the push end of the inner diameter adjusting cylinder, and the internal gap of the push connecting seat forms a drive cavity. Bevel gear A is arranged in the drive cavity via bearing seat A. The drive motor passes through the push connecting seat, and the rotating end of the drive motor is equipped with a drive bevel gear that meshes with bevel gear A. Bevel gear B is arranged on one side of the drive bevel gear via bearing seat B. The expanding tube head passes through the push connecting seat and connects to the drive cavity. Several expanding blocks are arranged in a ring at equal intervals within the expanding tube head. Each expanding block consists of a trapezoidal contact block and two arc-shaped pressing blocks on both sides. A frustum-shaped drive shaft is arranged on the bevel gear. The drive shaft B extends into the drive cavity, and the end of the frustum-shaped drive shaft is provided with a one-way screw tooth. The cylindrical drive shaft is arranged on the bevel gear A and extends into the drive cavity, and the end of the cylindrical drive shaft is provided with a two-way screw tooth. The frustum-shaped drive shaft and the cylindrical drive shaft are movably connected. The hollow top shaft is arranged on the outer wall of the frustum-shaped drive shaft and is threadedly connected to the frustum-shaped drive shaft. Two top shafts are arranged opposite to each other on the outer wall of the cylindrical drive shaft and are threadedly connected to the cylindrical drive shaft. At least one ring spring is arranged in the drive cavity to connect the extension block. The extension block is movably connected to the ring spring, so that adjacent two extension blocks have a reset effect. The drive motor, bevel gear A, cylindrical drive shaft, top shaft, and extension block constitute a spiral cylindrical extension structure. The drive motor, bevel gear B, frustum-shaped drive shaft, hollow top shaft, and extension block constitute a spiral frustum-shaped extension structure. This invention uses a drive motor to rotate a bevel gear B, which in turn rotates a frustum-shaped drive shaft. This causes the hollow top shaft to slide and compress the expansion block. Simultaneously, another set of ring springs elastically limits the expansion block, allowing it to rotate and tilt outwards to expand the tube, completing the frustum-shaped expansion process. Furthermore, the drive motor rotates in opposite directions, driving a bevel gear A to rotate a cylindrical drive shaft. Bidirectional helical teeth slide the two top shafts, simultaneously compressing both sides of the expansion block, causing the entire expansion block to expand outwards to complete the cylindrical expansion process. This invention is suitable for various applications requiring cylindrical and frustum-shaped tube expansion in existing tube expansion processes.

[0017] A processing technology for a stainless steel pipe cold expansion device includes the following steps:

[0018] S100, Pre-storage treatment: Several stainless steel pipes are placed into the storage cavity by hand in sequence, and stacking of pipes is avoided except at corners;

[0019] S200, feeding process: the unloading cylinder lifts and lowers the unloading top block and the unloading top block on the combination plate. During the lifting and lowering process, the stainless steel pipe is located at the first position of the output end of the placement cavity. The rising of the unloading top block causes the stainless steel pipe to roll naturally into the locking cavity.

[0020] S300, Positioning Process: The second positioning pressing block is brought into contact with the first positioning pressing block by the pressing cylinder to limit the stainless steel pipe rolling into the locking cavity.

[0021] S400, pipe expansion treatment:

[0022] If a frustum tube expansion is to be performed, the expansion mechanism is driven by an inner diameter adjusting cylinder to perform a stroke operation, penetrating deep into the stainless steel tube. The drive motor rotates the bevel gear B, which in turn rotates the frustum-shaped drive shaft, causing the hollow top shaft to slide. At the same time, the bevel gear A also rotates synchronously, causing the top shaft to move to both sides. One of the top shafts moves inside the hollow top shaft. Due to the size difference of the hollow top shaft and the hollow design, the hollow top shaft can continue to move. Within a reasonable expansion range, the hollow top shaft and one of the top shafts will not affect each other. At this time, the hollow top shaft squeezes the expansion block, and under the elastic limit of another set of ring springs, the expansion block is elastically limited, causing the expansion block to rotate and tilt outward to expand, thus completing the frustum tube expansion operation.

[0023] If a cylindrical tube expansion is to be performed, the expansion mechanism is driven by the inner diameter adjustment cylinder to perform a stroke operation, penetrating into the stainless steel tube. The drive motor rotates in opposite directions to drive the bevel gear A to rotate, which in turn rotates the cylindrical drive shaft, causing the two top shafts to move closer to each other. At this time, the bevel gear B rotates in opposite directions to cause the hollow top shaft to perform a return sliding operation. At the same time, the top shaft inside the hollow top shaft is limited to prevent it from being driven. When the top shaft moves closer, it simultaneously squeezes the two sides of the expansion block, causing the expansion block to expand outward as a whole, thus completing the cylindrical tube expansion operation.

[0024] S500, Adjustment Process: The pressing cylinder returns to its original position and separates from the first positioning pressing block. At this time, the unloading cylinder performs a relatively long-stroke ejection of the unloading top block to loosen the stainless steel tube from the first positioning pressing block. Then, the pressing cylinder performs a stroke to make the rubber wheel fit against the stainless steel tube. Under the limit of the second positioning pressing block and the first positioning pressing block, the stainless steel tube is limited to a loose state. Then, by adjusting the motor to drive multiple rubber wheels to rotate, the stainless steel tube can be rotated to adjust the angle to meet the needs of multi-directional tube expansion. Then, the tube expansion process is performed.

[0025] S600. Stripping and blanking process: The height difference between the output end of the placement cavity and the first positioning and pressing block is used to limit the stainless steel pipe. The linkage blanking groove opened at the output end of the placement cavity is used to enable the blanking top block to penetrate. The stripping cylinder is used to lift and lower the stripping top block and the blanking top block on the combined disk. During the lifting and lowering operation, the stainless steel pipe is located at the head of the output end of the placement cavity. When the stripping cylinder strokes, the blanking top block pushes out the stainless steel pipe. At this time, the stripping top block simultaneously rises to push out the processed stainless steel pipe, and the inclined groove is used to make the stainless steel pipe slide directionally and disengage from the clamping cavity. Under the action of the height difference between the first positioning and pressing block and the head position of the output end of the placement cavity, the stainless steel pipe naturally rolls into the clamping cavity with the rising of the blanking top block.

[0026] S700. Collection process: After the stainless steel pipe is stripped, it rolls onto the conveying platform by itself through the inclined material receiving platform on the processing cavity for collection.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. The present invention uses an inclined auxiliary mechanism to enable the stainless steel pipe placed in the placement cavity to slide to the output end of the placement cavity by relying on its own cylindrical shape. The combined mechanism is used to protrude and lift the processed stainless steel pipe and assist in lifting the first stainless steel pipe at the output end of the placement cavity and sliding it into the clamping cavity, realizing automatic continuous stripping and feeding operations, eliminating the need for manual feeding and unloading, and improving the operation efficiency of feeding and unloading during pipe expansion processing.

[0029] 2. The present invention uses a single stripping cylinder to lift and lower the stripping top block and the blanking top block on the combined disk. During the lifting and lowering operation, the stainless steel pipe is located at the head of the output end of the placement cavity. When the stripping cylinder strokes, the blanking top block pushes out the stainless steel pipe. At this time, the stripping top block simultaneously rises to push out the processed stainless steel pipe, and the inclined groove is used to make the stainless steel pipe slide directionally and disengage from the clamping cavity. Under the action of the height difference between the first positioning and pressing block and the head position of the output end of the placement cavity, the stainless steel pipe naturally rolls into the clamping cavity with the rising of the blanking top block. The feeding and unloading of the stainless steel pipe are realized through the operation of a single stripping cylinder, and its overall structure is simple, facilitating installation and production manufacturing.

[0030] 3. The present invention is installed and connected in a Z - shape through several inclined trays to place stainless steel pipes. Mainly relying on the rollable characteristic of the cylindrical shape of the pipes themselves, the stainless steel pipes can be laid flat in sequence in the placement cavity. Combining with the height difference between the output end of the placement cavity and the first positioning and pressing block, the stainless steel pipes are limited. By using the linkage blanking groove opened at the output end of the placement cavity, the blanking top block can penetrate. When the blanking work is completed, the blanking top block descends to the lower part of the output end of the placement cavity based on the return stroke of the stripping cylinder. At this time, the second stainless steel pipe rolls to the first position of the output end of the placement cavity, waiting for the next feeding work. And the overall structure is simple, the production cost of the auxiliary mechanism is low, and mainly relying on the rollable characteristic of the cylindrical shape of the pipes on the inclined trays, no control device needs to be adapted, greatly reducing the manufacturing cost.

[0031] 4. The present invention rotates the driving motor to drive the bevel gear B to rotate the frustum - shaped driving shaft, making the hollow top shaft slide and move, squeezing the expansion block. And under the elastic limit of another set of ring springs, the expansion block is elastically limited to make the expansion block rotate and tilt outwards for expansion work, completing the frustum - shaped pipe expansion work. And by rotating the driving motor in the opposite direction, driving the bevel gear A to rotate, making the cylindrical driving shaft rotate, using the bidirectional spiral teeth to slide and move the two top shafts, and simultaneously squeezing both sides of the expansion block, making the whole expansion block expand outwards to complete the cylindrical pipe expansion work, so as to adapt to the processing requirements of various uses such as cylindrical and frustum - shaped pipe expansion processing in the existing pipe expansion work. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the overall structure schematic diagram of the present invention;

[0033] Figure 2 is the sectional structure schematic diagram of the combined mechanism of the present invention;

[0034] Figure 3 is the three - dimensional structure schematic diagram of the adjusting mechanism of the present invention;

[0035] Figure 4 is the Figure 2 local enlarged structure schematic diagram at A in the present invention;

[0036] Figure 5 is the three - dimensional structure schematic diagram of the pipe expansion mechanism of the present invention;

[0037] Figure 6 is the sectional structure schematic diagram of the pipe expansion mechanism of the present invention;

[0038] Figure 7 is the front - view internal structure schematic diagram of the pipe expansion mechanism of the present invention.

[0039] In the diagram: 1. Pipe expander frame; 2. Assembly mechanism; 201. Base; 202. Cantilever block; 203. First positioning and pressing block; 204. Unloading cylinder; 205. Assembly plate; 206. Unloading top block; 207. Discharge top block; 3. Auxiliary mechanism; 301. Connecting frame; 302. Bearing frame; 4. Positioning mechanism; 401. Pressing cylinder; 402. Second positioning and pressing block; 5. Adjustment mechanism; 501 502. Limiting seat; 503. Adjusting motor; 504. Shaft; 505. Rubber wheel; 6. Inner diameter adjusting cylinder; 7. Expanding mechanism; 706. Push connecting seat; 707. Gear A; 708. Drive motor; 709. Bevel gear B; 7000. Expanding head; 701. Extension block; 702. Frustum-shaped drive shaft; 7000. Column-shaped drive shaft; 701. Hollow top shaft; 712. Top shaft; 713. Ring spring. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0041] A stainless steel pipe cold expansion device, see [link / reference] Figures 1 to 7 It includes a pipe expansion frame 1, a combination mechanism 2, an auxiliary mechanism 3, a positioning mechanism 4, an adjustment mechanism 5, an inner diameter adjustment cylinder 6, and a pipe expansion mechanism 7;

[0042] The expansion frame 1 has an internal gap forming a processing cavity. A combination mechanism 2 is arranged inside the processing cavity. An auxiliary mechanism 3 is arranged at the bottom of the expansion frame 1 and extends to the outside of the processing cavity. The internal gap of the auxiliary mechanism 3 forms a placement cavity, which is inclined. A positioning mechanism 4 is arranged above the processing cavity via a transverse beam. The positioning mechanism 4 and the combination mechanism 2 form a locking cavity, which is connected to the output end of the placement cavity to form a loading and unloading channel. The positioning mechanism 4 is a movable convex top structure, which can control the connection and disconnection of the loading and unloading channel. An adjustment mechanism 5 is inserted inside the positioning mechanism 4 and connected to the expansion frame 1. An inner diameter adjustment cylinder 6 is inserted on one side of the expansion frame 1 and connected to the processing cavity. An expansion mechanism 7 is arranged on the pushing end of the inner diameter adjustment cylinder 6. The expansion mechanism 7 is a spiral expansion structure. This invention uses an inclined auxiliary mechanism 3 to allow the stainless steel tube placed in the placement cavity to slide to the output end of the placement cavity by its own cylindrical shape. This, together with the combination mechanism 2, protrudes and lifts the processed stainless steel tube, and assists in lifting the first stainless steel tube at the output end of the placement cavity and sliding it into the locking cavity. This achieves automated continuous unloading and loading, eliminating the need for manual loading and unloading, and improving the efficiency of tube expansion processing.

[0043] One implementation example Figure 2 and Figure 4As shown, to facilitate understanding of how the combined mechanism 2 performs the feeding and unloading of stainless steel pipes, the present invention also discloses a more specific implementation of the combined mechanism 2. The combined mechanism 2 includes a base 201, a lifting block 202, a first positioning and pressing block 203, a stripping cylinder 204, a combined plate 205, a stripping top block 206, and a unloading top block 207.

[0044] The base 201 is located at the bottom of the processing cavity, the cantilever block 202 is fixed to the top of the base 201, the first positioning and pressing block 203 is located at the top of the cantilever block 202, and the cantilever block 202 has a raised top groove extending to the upper end of the first positioning and pressing block 203. The first positioning and pressing block 203 has a first slot. The ejector cylinder 204 is located on one side of the cantilever block 202 via a mounting base. The combination plate 205 is located on the top of the ejector cylinder 204. At least one ejector top block 206 is located on one side of the top of the combination plate 205. The ejector top block 206 is raised and lowered in cooperation with the first positioning and pressing block 203 via the combination plate 205. The ejector top block 206 has a guide groove on its upper side, which consists of an arc groove adapted to the first slot and an inclined groove. At least one unloading top block 207 is located on the other side of the top of the combination plate 205. The single ejector cylinder 204 lifts and lowers the ejector block 206 and the unloading block 207 on the combination plate 205. During the lifting and lowering operation, the stainless steel pipe is located at the first end of the output end of the placement cavity. When the ejector cylinder 204 operates, the unloading block 207 pushes the stainless steel pipe out. At the same time, the ejector block 206 rises simultaneously to push out the processed stainless steel pipe. The inclined groove is designed to allow the stainless steel pipe to slide directionally and disengage from the locking cavity. Under the height difference between the first positioning pressing block 203 and the first end of the output end of the placement cavity, the rising operation of the unloading block 207 causes the stainless steel pipe to roll naturally into the locking cavity. The single ejector cylinder 204 is used to realize the loading and unloading of the stainless steel pipe. Its overall structure is simple and easy to install and manufacture.

[0045] One implementation example Figure 1 and Figure 2 As shown, to facilitate understanding of how the auxiliary mechanism 3 sequentially feeds materials, the present invention also discloses an embodiment in which the auxiliary mechanism 3 includes a connecting frame 301 and a support frame 302.

[0046] The connecting frame 301 is arranged on one side of the unloading cylinder 204, and the bearing frame 302 is arranged on the top of the connecting frame 301. The bearing frame 302 is composed of several inclined trays connected together. The output end of the bearing frame 302 is provided with a linkage unloading groove that cooperates with the unloading top block 207. This invention uses several inclined trays connected in a Z-shape to place stainless steel pipes. It relies primarily on the cylindrical shape of the pipes themselves, allowing them to roll, and lay them flat in the placement cavity. The height difference between the outlet of the placement cavity and the first positioning and pressing block 203 limits the movement of the stainless steel pipes. A connecting feeding chute at the outlet of the placement cavity allows the feeding top block 207 to pass through. After feeding is completed, the feeding top block 207 descends to below the outlet of the placement cavity based on the return stroke of the unloading cylinder 204. At this point, the second stainless steel pipe rolls to the first position at the outlet of the placement cavity, ready for the next feeding operation. The overall structure is simple, the auxiliary mechanism 3 has low production costs, and it mainly relies on the cylindrical shape of the inclined trays and the rolling nature of the pipes themselves, eliminating the need for a control device and significantly reducing manufacturing costs.

[0047] One implementation example Figure 2 As shown, to facilitate understanding of how the positioning mechanism 4 limits the stainless steel pipe, the present invention also discloses an embodiment in which the positioning mechanism 4 includes a pressing cylinder 401 and a second positioning pressing block 402.

[0048] In this invention, a pressing cylinder 401 is positioned on top of the first positioning pressing block 203, and a second positioning pressing block 402 is positioned at the pushing end of the pressing cylinder 401. The second positioning pressing block 402 has a second slot at its bottom. The invention utilizes the second positioning pressing block 402 in conjunction with the pressing cylinder 401 during its stroke to contact the first positioning pressing block 203, thereby limiting the movement of the stainless steel pipe rolling into the locking cavity. Simultaneously, the adjusting mechanism 5 is used to prevent displacement of the stainless steel pipe during processing.

[0049] One implementation example Figure 2 and Figure 3 As shown, to facilitate understanding of how the adjustment mechanism 5 rotates and adjusts the stainless steel pipe, the present invention also discloses an embodiment in which the adjustment mechanism 5 includes a limit seat 501, an adjustment motor 502, a shaft 503, and a rubber wheel 504.

[0050] The limiting seat 501 is fixed to the extension end of the second positioning pressing block 402 and connected to the pipe expansion frame 1. The adjusting motor 502 passes through the limiting seat 501. The shaft 503 is arranged on the rotating end of the adjusting motor 502 through a coupling. Several rubber wheels 504 are arranged linearly and equally spaced on the shaft 503. This invention uses the ejection cylinder 204 to eject the ejection top block 206 with a shorter stroke than the longer stroke of the ejection operation, so as to loosen the stainless steel pipe from the first positioning pressing block 203. In conjunction with the adjusting motor 502 driving the multiple rubber wheels 504 to rotate, the stainless steel pipe can be rotated to adjust its angle to meet the needs of multi-directional pipe expansion.

[0051] One implementation example Figure 5 , Figure 6 and Figure 7 As shown, to facilitate understanding of how the tube expanding mechanism 7 performs two different tube expanding operations, the present invention also discloses an embodiment. The tube expanding mechanism 7 includes a push connecting seat 701, a bevel gear A 702, a drive motor 703, a bevel gear B 704, a tube expanding head 705, an expansion block 706, a columnar drive shaft 708, a hollow top shaft 709, a top shaft 710, and a ring spring 711.

[0052] The push connecting seat 701 is bolted to the push end of the inner diameter adjusting cylinder 6, and the internal gap of the push connecting seat 701 forms a drive cavity. The bevel gear A702 is arranged in the drive cavity via bearing seat A. The drive motor 703 passes through the push connecting seat 701, and the rotating end of the drive motor 703 is equipped with a drive bevel gear that meshes with the bevel gear A702. The bevel gear B704 is arranged on one side of the drive bevel gear via bearing seat B. The expansion head 705 passes through the push connecting seat 701 and connects to the drive cavity. Several expansion blocks 706 are arranged in a ring at equal intervals within the expansion head 705. Each expansion block 706 consists of a trapezoidal contact block and two arc-shaped pressing blocks on both sides. The trapezoidal contact blocks can contact and press against the top shaft 710 and the hollow top shaft 709 respectively, allowing the expansion block 706 to open. The arc-shaped pressing blocks allow the expansion block 706 to unfold into a frustum shape. During operation, its size can be adapted to the required rotation space to avoid jamming of the expansion block 706. The frustum-shaped drive shaft 707 is arranged on the bevel gear B704 and extends into the drive cavity, and the end of the frustum-shaped drive shaft 707 is provided with a one-way screw tooth. The cylindrical drive shaft 708 is arranged on the bevel gear A702 and extends into the drive cavity, and the end of the cylindrical drive shaft 708 is provided with a two-way screw tooth. The frustum-shaped drive shaft 707 and the cylindrical drive shaft 708 are movably connected. The hollow top shaft 709 is arranged on the outer wall of the frustum-shaped drive shaft 707 and is threadedly connected to the frustum-shaped drive shaft 707. Two top shafts 710 are arranged opposite to each other on the outer wall of the cylindrical drive shaft 708 and are threadedly connected to the cylindrical drive shaft 708. At least one ring spring 711 is arranged in the drive cavity to connect the expansion block 706. The expansion block 706 is movably connected to the ring spring 711, so that the two adjacent expansion blocks 706 have a reset effect. The drive motor 703, bevel gear A702, columnar drive shaft 708, top shaft 710 and extension block 706 form a spiral columnar extension structure, and the drive motor 703, bevel gear B704, frustum-shaped drive shaft 707, hollow top shaft 709 and extension block 706 form a spiral frustum-shaped extension structure. This invention uses a drive motor 703 to rotate a bevel gear B704, which in turn rotates a frustum-shaped drive shaft 707. This causes the hollow top shaft 709 to slide and compress the expansion block 706. Under the elastic restraint of another set of ring springs 711, the expansion block 706 is also elastically restrained, allowing it to rotate and tilt outwards to complete the frustum-shaped tube expansion. Furthermore, the drive motor 703 rotates in the opposite direction, driving a bevel gear A702 to rotate a cylindrical drive shaft 708. This utilizes bidirectional helical gears to slide the two top shafts 710, simultaneously compressing both sides of the expansion block 706, causing the entire expansion block 706 to expand outwards to complete the cylindrical tube expansion. This invention is suitable for various applications requiring cylindrical and frustum-shaped tube expansion in existing tube expansion processes.

[0053] A processing technology for a stainless steel pipe cold expansion device includes the following steps:

[0054] S100, Pre-storage treatment: Several stainless steel pipes are placed into the storage cavity by hand in sequence, and stacking of pipes is avoided except at corners;

[0055] S200, feeding process: the unloading cylinder 204 lifts and lowers the unloading top block 206 and the unloading top block 207 on the combination plate 205. During the lifting and lowering process, the stainless steel pipe is located at the first position of the output end of the placement cavity. The unloading top block 207 rises and causes the stainless steel pipe to roll naturally into the locking cavity.

[0056] S300, Positioning process: The pressing cylinder 401 performs a stroke to make the second positioning pressing block 402 contact the first positioning pressing block 203, thereby limiting the stainless steel pipe that rolls into the locking cavity.

[0057] S400, pipe expansion treatment:

[0058] If a frustum tube expansion is to be performed, the expansion mechanism 7 is driven by the inner diameter adjusting cylinder 6 to perform a stroke operation, penetrating deep into the stainless steel tube. The drive motor 703 rotates to drive the bevel gear B704, causing the frustum-shaped drive shaft 707 to rotate, which in turn causes the hollow top shaft 709 to slide. At the same time, the bevel gear A702 also rotates synchronously, causing the top shaft 710 to move to both sides. One of the top shafts 710 moves inside the hollow top shaft 709. Due to the size difference and hollow design of the hollow top shaft 709, the hollow top shaft 709 can continue to move. Within a reasonable expansion range, the hollow top shaft 709 and one of the top shafts 710 will not affect each other. At this time, the hollow top shaft 709 presses the expansion block 706, and under the elastic limit of another set of ring springs 711, the expansion block 706 is elastically limited, causing the expansion block 706 to rotate and tilt outward to expand, thus completing the frustum tube expansion operation.

[0059] If a cylindrical tube expansion operation is to be performed, the inner diameter adjusting cylinder 6 drives the tube expansion mechanism 7 to perform a stroke operation, penetrating into the stainless steel tube. The drive motor 703 rotates in opposite directions to drive the bevel gear A702 to rotate, thereby rotating the cylindrical drive shaft 708. This causes the two top shafts 710 to move closer to each other. At this time, the bevel gear B704 rotates in opposite directions to cause the hollow top shaft 709 to perform a return sliding operation. At the same time, the top shaft 710 inside the hollow top shaft 709 is limited to prevent it from being driven. When the top shaft 710 moves closer, it simultaneously squeezes the two sides of the expansion block 706, causing the expansion block 706 to expand outward as a whole, thus completing the cylindrical tube expansion operation.

[0060] S500, Adjustment Processing: The pressing cylinder 401 returns to its original position and separates from the first positioning pressing block 203. At this time, the unloading cylinder 204 performs a relatively long-stroke ejection action on the unloading top block 206 to loosen the stainless steel tube from the first positioning pressing block 203. Then, the pressing cylinder 401 performs a stroke to make the rubber wheel 504 fit against the stainless steel tube. Under the limit of the second positioning pressing block 402 and the first positioning pressing block 203, the stainless steel tube is limited to a loose state. Then, the adjusting motor 502 drives multiple rubber wheels 504 to rotate, so that the stainless steel tube can be rotated to adjust the angle to meet the requirements of multi-directional tube expansion. Then, the tube expansion process is carried out.

[0061] S600, Unloading and unloading process: The height difference between the output end of the placement cavity and the first positioning pressing block 203 is used to limit the stainless steel pipe. The unloading groove opened at the output end of the placement cavity is used to allow the unloading top block 207 to pass through. The unloading cylinder 204 lifts and lowers the unloading top block 206 and the unloading top block 207 on the combination plate 205. During the lifting and lowering operation, the stainless steel pipe is located at the first position of the output end of the placement cavity. When the unloading cylinder 204 works, the unloading top block 207 pushes out the stainless steel pipe. At this time, the unloading top block 206 rises simultaneously to push out the processed stainless steel pipe. With the help of the inclined groove, the stainless steel pipe slides in a direction and disengages from the locking cavity. Under the action of the height difference between the first positioning pressing block 203 and the first position of the output end of the placement cavity, the stainless steel pipe rolls naturally into the locking cavity in conjunction with the rising operation of the unloading top block 207.

[0062] S700 Collection and processing: After the stainless steel pipes are unloaded, they roll automatically onto the conveyor platform via the inclined receiving table on the processing chamber for collection.

[0063] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A stainless steel pipe cold expansion device, characterized in that, include: The expansion frame (1) has an internal gap that forms a processing cavity. The assembly mechanism (2) is arranged inside the processing cavity; An auxiliary mechanism (3) is arranged at the bottom of the expansion frame (1) and extends to the outside of the processing cavity. The internal gap of the auxiliary mechanism (3) forms a placement cavity, and the placement cavity is an inclined structure. The positioning mechanism (4) is arranged above the processing cavity via a transverse beam frame. The positioning mechanism (4) and the combination mechanism (2) form a locking cavity through a gap. The locking cavity is connected to the output end of the placement cavity to form an unloading channel. Furthermore, the positioning mechanism (4) is a movable convex top structure, which can control the connection and disconnection of the loading and unloading channels through the positioning mechanism (4); The adjustment mechanism (5) is installed inside the positioning mechanism (4) and connected to the expansion frame (1); An inner diameter adjusting cylinder (6) is installed on one side of the expansion frame (1) and connected to the processing cavity; The expansion mechanism (7) is arranged on the push end of the inner diameter adjusting cylinder (6), wherein the expansion mechanism (7) is a spiral expansion structure; The combined mechanism (2) includes: A base (201) is disposed at the bottom of the processing cavity; A cantilever block (202) is fixed to the top of the base (201); The first positioning pressing block (203) is arranged on the top of the cantilever block (202); and the cantilever block (202) has a raised top groove extending to the upper end of the first positioning pressing block (203); and the first positioning pressing block (203) has a first slot inside. The unloading cylinder (204) is arranged on one side of the hollow block (202) via a mounting base; A combination plate (205) is arranged on top of the unloading cylinder (204); At least one stripping top block (206) is arranged on one side of the top of the combination plate (205); and the stripping top block (206) is in vertical engagement with the first positioning pressing block (203) through the combination plate (205); and a guide groove is provided on the upper side of the stripping top block (206), wherein the guide groove is composed of an arc groove adapted to the first slot and an inclined groove; At least one top material discharge block (207) is arranged on the other side of the top of the combined tray (205); The auxiliary mechanism (3) includes: A connecting frame (301) is arranged on one side of the unloading cylinder (204); A support frame (302) is arranged on top of the connecting frame (301); and the support frame (302) is composed of several inclined trays connected together; wherein, the output end of the support frame (302) is provided with a linkage discharge groove that cooperates with the discharge top block (207); The expansion mechanism (7) includes: The push connecting seat (701) is bolted to the push end of the inner diameter adjusting cylinder (6); and the internal gap of the push connecting seat (701) forms a drive cavity; Bevel gear A (702) is arranged in the drive cavity via bearing housing A; A drive motor (703) is installed inside the push connecting seat (701); and the rotating end of the drive motor (703) is provided with a drive bevel gear that meshes with the bevel gear A (702); Bevel gear B (704) is arranged on one side of the drive bevel gear via bearing housing B; An expansion head (705) is inserted into the push connection seat (701) and connected to the drive cavity; Several expansion blocks (706) are arranged in a ring at equal intervals within the expansion head (705). Each expansion block (706) consists of a trapezoidal contact block and arc-shaped pressing blocks on both sides. A frustum-shaped drive shaft (707) is arranged on the bevel gear B (704) and extends into the drive cavity, and the end of the frustum-shaped drive shaft (707) is provided with a one-way screw tooth; A cylindrical drive shaft (708) is arranged on the bevel gear A (702) and extends into the drive cavity. The end of the cylindrical drive shaft (708) is provided with bidirectional screw teeth. The frustum-shaped drive shaft (707) is movably connected to the cylindrical drive shaft (708). A hollow top shaft (709) is arranged on the outer wall of the frustum-shaped drive shaft (707), and the hollow top shaft (709) is threadedly connected to the frustum-shaped drive shaft (707); Two top shafts (710) are arranged opposite to each other on the outer wall of the columnar drive shaft (708), and the top shafts (710) are threadedly connected to the columnar drive shaft (708); At least one ring spring (711) is arranged in the drive cavity to connect the extension block (706), wherein the extension block (706) is movably connected to the ring spring (711), such that two adjacent extension blocks (706) have a reset effect.

2. The stainless steel pipe cold expansion equipment as described in claim 1, characterized in that, The positioning mechanism (4) includes: A pressing cylinder (401) is arranged on top of the first positioning pressing block (203); The second positioning pressing block (402) is arranged at the pushing end of the pressing cylinder (401), and a second slot is provided at the bottom of the second positioning pressing block (402).

3. The stainless steel pipe cold expansion equipment as described in claim 2, characterized in that, The adjustment mechanism (5) includes: The limiting seat (501) is fixedly mounted on the extension end of the second positioning pressing block (402) and connected to the pipe expansion frame (1); An adjusting motor (502) is inserted into the limiting seat (501); The shaft (503) is arranged at the rotating end of the regulating motor (502) via a coupling; Several rubber wheels (504) are arranged linearly and at equal intervals on the shaft (503).

4. The stainless steel pipe cold expansion equipment as described in claim 3, characterized in that, The drive motor (703), bevel gear A (702), columnar drive shaft (708), top shaft (710) and extension block (706) constitute a spiral columnar extension structure. The drive motor (703), bevel gear B (704), frustum-shaped drive shaft (707), hollow top shaft (709) and extension block (706) constitute a spiral frustum-shaped extension structure.

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