Stainless steel pipe automatic centering feeding structure for drawing machine

Abstract

The invention relates to the technical field of drawing machines, and discloses an automatic stainless steel pipe centering and feeding structure for a drawing machine, which comprises a supporting assembly and a centering and feeding assembly, and is characterized in that the centering and feeding assembly is positioned at the top of the supporting assembly, a centering ring is directly aligned with a drawing die, and a centering reference is established by taking the center of the die as a reference; the lateral deviation of the stainless steel tube is limited by using the V-shaped feeding roller, and the height deviation of the stainless steel tube is detected only through the upper and lower groups of laser distance measuring sensors, so that the detection dimension is simplified; and then vertical height linkage adjustment is conducted on the V-shaped feeding roller and the hydraulic chuck, vertical deviation is rapidly corrected, accurate centering of the stainless steel pipe and the drawing die is achieved, and therefore the problems that in a traditional feeding centering mode, precision is insufficient, adjustment is complex, and adaptability is poor are solved, the requirement for efficient and accurate centering of stainless steel pipe drawing is met, and the production efficiency is improved. The device is especially suitable for machining scenes of small and medium batches of multi-specification pipes.

Description

Technical Field

[0001] The invention belongs to the technical field of drawing machines, and in particular relates to an automatic centering and feeding structure for stainless steel pipes used in drawing machines. Background Art

[0002] In the drawing process of stainless steel pipes, the concentricity between the pipe and the drawing die is a key factor in determining the quality of the finished product. If the pipe is offset upward or downward during feeding, it will lead to uneven wall thickness, excessive ovality, and even localized wrinkles or cracks in the drawn pipe, seriously affecting the product qualification rate. The requirements for centering accuracy are particularly stringent for high-precision stainless steel pipes.

[0003] At present, the feeding and centering of drawing machines mostly rely on manual assistance or simple mechanical guidance: manual adjustment requires the operator to observe the position of the pipe in real time and manually correct it, which is inefficient and the accuracy is greatly affected by experience; although the traditional V-shaped feed wheel can limit lateral deviation, it cannot solve the height deviation in the vertical direction. Some automated equipment uses multiple sets of sensors for omnidirectional detection combined with complex drive structure adjustment, but it is costly and complex to debug, making it unsuitable for small and medium-sized production scenarios.

[0004] The core pain point of existing technologies lies in the lack of accurate detection and efficient correction solutions for "upward and downward deviations". On the one hand, the pipe may have slight bends after previous processes (such as rolling and cutting), and it is easy to cause upward and downward deviations during the feeding process due to gravity or inconsistent feed roller heights. On the other hand, if the centering structure of the drawing die inlet lacks linkage with the feeding system, even if the deviation is detected, it is difficult to quickly adjust it, resulting in the deviation continuing to affect subsequent processing. To this end, we propose an automatic centering and feeding structure for stainless steel pipes for drawing machines. Summary of the Invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an automatic centering and feeding structure for stainless steel pipes for drawing machines, which effectively solves the problem that the prior art lacks accurate detection and efficient correction solutions for "up and down deviations". The pipe may have slight bends after the previous process, and it is easy to cause up and down deviations due to gravity or inconsistent height of the feeding roller during the feeding process; if the centering structure of the drawing die entrance lacks linkage with the feeding system, even if the deviation is detected, it is difficult to adjust quickly, resulting in the problem that the deviation continues to affect subsequent processing.

[0006] To achieve the above object, the present invention provides the following technical solution: an automatic centering and feeding structure for stainless steel pipes for a drawing machine, comprising a support assembly and a centering and feeding assembly, characterized in that: the centering and feeding assembly is located on the top of the support assembly; The centering and feeding assembly includes a first lifting platform, a U-shaped guide rod is provided on the left side of the first lifting platform, a first electric push rod is provided at the bottom of the U-shaped guide rod, two groups of second electric push rods are evenly provided at the bottom of the first lifting platform, V-shaped feeding rollers are evenly provided on the top of the first lifting platform, a centering ring is placed above the first lifting platform, two groups of laser ranging sensors are evenly provided on the right side of the centering ring, two groups of guide sleeves are evenly sleeved on the outer side of the U-shaped guide rod, a second lifting platform is provided between the two groups of guide sleeves, and a hydraulic chuck is provided on the top of the second lifting platform, and the hydraulic chuck is aligned with the centering ring and the V-shaped feeding roller.

[0007] Preferably, the support assembly includes a fixed-chain conveyor tractor, a support platform is provided on the right side of the fixed-chain conveyor tractor, a main controller is provided on the front side of the fixed-chain conveyor tractor, and the main controller is electrically connected to the fixed-chain conveyor tractor, the first electric push rod, the second electric push rod and the laser ranging sensor.

[0008] Preferably, a guide groove is provided on the top of the slide of the fixed chain conveyor tractor, the second lifting platform is located on the top of the slide of the fixed chain conveyor tractor, and a guide block is provided on the bottom of the second lifting platform, and the guide block is arranged in the guide groove.

[0009] Preferably, a first mounting groove is provided on the left side of the top of the fixed chain conveyor tractor, a second mounting groove is evenly provided on the top of the support platform, two groups of first guide holes are evenly provided on the left side of the top of the fixed chain conveyor tractor, and a second guide hole is evenly provided on the top of the support platform.

[0010] Preferably, two groups of second guide columns are evenly arranged on the left side of the bottom of the U-shaped guide rod, and first guide columns are evenly arranged on the bottom of the first lifting platform.

[0011] Preferably, the first electric push rod and the second electric push rod are respectively arranged in the first mounting groove and the second mounting groove, and the second guide column and the first guide column are respectively arranged in the first guide hole and the second guide hole.

[0012] Preferably, an escape opening is provided through the left side of the top of the first lifting platform, a drawing die is placed in the escape opening, and the drawing die is fixed to the top of the support platform by bolts.

[0013] Preferably, the centering ring is fixed on the right side of the drawing die by bolts, and the centering ring is aligned with the drawing die.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By aligning the centering ring directly with the drawing die, a centering reference is established with the center of the die as the reference; the V-shaped feed roller is used to limit the lateral deviation of the stainless steel tube, and the height deviation of the stainless steel tube is detected only by two sets of upper and lower laser ranging sensors, thereby simplifying the detection dimension; and the V-shaped feed roller and the hydraulic chuck are adjusted in conjunction with each other in height to quickly correct the upper and lower deviations, thereby achieving precise alignment of the stainless steel tube and the drawing die. This solves the problems of insufficient accuracy, complex adjustment, and poor adaptability in traditional feeding and centering methods, meets the needs of stainless steel tube drawing for efficient and precise centering, and is especially suitable for the processing scenarios of small and medium-sized batches of multi-specification pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0016] In the attached figure: Figure 1 This is a structural schematic diagram of an automatic centering and feeding structure for stainless steel pipes used in a drawing machine according to the present invention; Figure 2 This invention is an automatic centering and feeding structure for stainless steel pipes used in drawing machines Figure 1 A magnified view of part A; Figure 3 This is a left side view of an automatic centering and feeding structure for stainless steel pipes used in a drawing machine according to the present invention; Figure 4 This is a front sectional view of an automatic centering and feeding structure for stainless steel pipes used in a drawing machine according to the present invention.

[0017] In the figure: 100, support assembly; 200, centering feed assembly; 1, chain conveyor traction machine; 11, support platform; 2, first lifting platform; 21, V-shaped feed roller; 22, centering ring; 23, laser ranging sensor; 24, U-shaped guide rod; 25, first electric push rod; 26, hydraulic chuck; 27, second lifting platform; 28, guide sleeve; 29, second electric push rod; 3, main controller; 31, drawing die; 32, first guide column; 33, second guide column; 34, guide block. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] like Figure 1-4As shown, the present invention provides a technical solution: an automatic centering and feeding structure for stainless steel pipes for a drawing machine, comprising a support assembly 100 and a centering and feeding assembly 200, wherein the centering and feeding assembly 200 is located on the top of the support assembly 100; The centering feeding assembly 200 includes a first lifting platform 2, a U-shaped guide rod 24 is fixedly provided on the left side of the first lifting platform 2, a first electric push rod 25 is fixedly provided at the bottom of the U-shaped guide rod 24, two sets of second electric push rods 29 are evenly fixedly provided at the bottom of the first lifting platform 2, the first electric push rod 25 and the second electric push rod 29 can be selected from high-precision, high-load-bearing SUCN type electric cylinders, a V-shaped feeding roller 21 is evenly fixedly provided on the top of the first lifting platform 2, and a centering ring 22 is placed above the first lifting platform 2 Two groups of laser ranging sensors 23 are evenly fixed on the right side of the centering ring 22, and two groups of guide sleeves 28 are evenly sleeved on the outside of the U-shaped guide rod 24. A second lifting platform 27 is fixed between the two groups of guide sleeves 28. When the second lifting platform 27 moves to the left, it will drive the guide sleeve 28 to slide to the left along the outside of the U-shaped guide rod 24, thereby assisting the second lifting platform 27 to slide stably. A hydraulic chuck 26 is fixed on the top of the second lifting platform 27, and the hydraulic chuck 26 is aligned with the centering ring 22 and the V-shaped feed roller 21.

[0020] The support assembly 100 includes a fixed chain conveyor tractor 1, a support platform 11 is fixedly provided on the right side of the fixed chain conveyor tractor 1, a main controller 3 is fixedly provided on the front side of the fixed chain conveyor tractor 1, the main controller 3 is electrically connected to the fixed chain conveyor tractor 1, the first electric push rod 25, the second electric push rod 29 and the laser ranging sensor 23, the main controller 3 can control the first electric push rod 25 and the second electric push rod 29 to work synchronously through the servo synchronous control system, a guide groove is provided on the top of the slide of the fixed chain conveyor tractor 1, the second lifting platform 27 is located at the top of the slide of the fixed chain conveyor tractor 1, a guide block 34 is fixedly provided on the bottom of the second lifting platform 27, the guide block 34 is slidably provided in the guide groove, a first mounting groove is provided on the left side of the top of the fixed chain conveyor tractor 1, and the top of the support platform 11 is evenly provided with The second mounting groove, two groups of first guide holes are evenly opened on the left side of the top of the fixed chain conveyor traction machine 1, and the second guide hole is evenly opened on the top of the support platform 11. Two groups of second guide columns 33 are evenly fixed on the left side of the bottom of the U-shaped guide rod 24, and the first guide column 32 is evenly fixed on the bottom of the first lifting platform 2. The first electric push rod 25 and the second electric push rod 29 are respectively fixed in the first mounting groove and the second mounting groove. The second guide column 33 and the first guide column 32 are respectively slidably set in the first guide hole and the second guide hole. An avoidance opening is opened through the left side of the top of the first lifting platform 2, and a drawing die 31 is placed in the avoidance opening. The drawing die 31 is fixed on the top of the support platform 11 by bolts, and the centering ring 22 is fixed on the right side of the drawing die 31 by bolts. The centering ring 22 is aligned with the drawing die 31.

[0021] A method for using an automatic centering and feeding structure for a stainless steel pipe for a drawing machine: Step 1: After placing the stainless steel pipe on the V-shaped feed roller 21, the unique V-shaped design of the V-shaped feed roller 21 can naturally center the front and rear sides of the stainless steel pipe. With the assistance of the V-shaped feed roller 21, the stainless steel pipe slides to the left so that the left side of the stainless steel pipe passes through the centering ring 22 and the drawing die 31 and is located in the clamping jaws of the hydraulic chuck 26. At this time, the two sets of laser ranging sensors 23 are respectively located on the upper and lower sides of the stainless steel pipe.

[0022] Step 2: Use two sets of laser ranging sensors 23 to measure the distance between the upper and lower sides of the stainless steel pipe to find out whether there is a deviation in the distance between the upper and lower sides of the stainless steel pipe and the two sets of centering rings 22. Then the main controller 3 drives the first electric push rod 25 and the second electric push rod 29 to work simultaneously according to the deviation value obtained by the two sets of laser ranging sensors 23. The first electric push rod 25 and the second electric push rod 29 drive the first lifting platform 2 and the U-shaped guide rod 24 to move up and down respectively with the assistance of the first guide column 32 and the second guide column 33. When the first lifting platform 2 moves up and down, it can drive the stainless steel pipe to move up and down through the V-shaped feeding roller 21, so that the distance between the upper and lower sides of the stainless steel pipe and the two sets of laser ranging sensors 23 is the same, thereby realizing automatic centering, and when the U-shaped guide rod 24 moves up and down, it will drive the second lifting platform 27 to move up and down with the assistance of the guide block 34 through the guide sleeve 28, so that the hydraulic chuck 26 and the stainless steel pipe are driven to move up and down synchronously through the second lifting platform 27.

[0023] Step 3: After the centering of the stainless steel pipe is completed, the left side of the stainless steel pipe is clamped by the hydraulic chuck 26, and then the fixed chain conveyor tractor 1 starts to work. When the slide of the fixed chain conveyor tractor 1 moves to the left, the second lifting platform 27 will be pulled to the left through the guide block 34, so that the second lifting platform 27 pulls the stainless steel pipe through the drawing die 31 for drawing through the hydraulic chuck 26, and in this process, when the second lifting platform 27 moves to the left, it will drive the guide sleeve 28 to slide to the left along the outer side of the U-shaped guide rod 24, thereby assisting the second lifting platform 27 to slide stably.

[0024] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0025] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automatic centering and feeding structure for stainless steel pipes for a drawing machine, comprising a support assembly (100) and a centering and feeding assembly (200), characterized in that: The centering feeding assembly (200) is located on the top of the supporting assembly (100); The centering and feeding assembly (200) includes a first lifting platform (2), a U-shaped guide rod (24) is provided on the left side of the first lifting platform (2), a first electric push rod (25) is provided at the bottom of the U-shaped guide rod (24), two groups of second electric push rods (29) are evenly provided at the bottom of the first lifting platform (2), a V-shaped feeding roller (21) is evenly provided on the top of the first lifting platform (2), a centering ring (22) is placed above the first lifting platform (2), two groups of laser ranging sensors (23) are evenly provided on the right side of the centering ring (22), two groups of guide sleeves (28) are evenly sleeved on the outer side of the U-shaped guide rod (24), a second lifting platform (27) is provided between the two groups of guide sleeves (28), a hydraulic chuck (26) is provided on the top of the second lifting platform (27), and the hydraulic chuck (26) is aligned with the centering ring (22) and the V-shaped feeding roller (21).

2. The automatic centering and feeding structure for stainless steel pipes used in drawing machines according to claim 1, characterized in that: The support assembly (100) includes a fixed chain conveyor tractor (1), a support platform (11) is provided on the right side of the fixed chain conveyor tractor (1), a main controller (3) is provided on the front side of the fixed chain conveyor tractor (1), and the main controller (3) is electrically connected to the fixed chain conveyor tractor (1), a first electric push rod (25), a second electric push rod (29) and a laser distance sensor (23).

3. The automatic centering and feeding structure for stainless steel pipes used in drawing machines according to claim 2, characterized in that: A guide groove is provided on the top of the slide of the fixed chain conveyor tractor (1); the second lifting platform (27) is located on the top of the slide of the fixed chain conveyor tractor (1); a guide block (34) is provided on the bottom of the second lifting platform (27); and the guide block (34) is arranged in the guide groove.

4. The automatic centering and feeding structure for stainless steel pipes used in drawing machines according to claim 3, characterized in that: The fixed chain type conveyor tractor (1) has a first installation groove on the left side of its top, the support platform (11) has a second installation groove on the top, two groups of first guide holes on the left side of its top, and the support platform (11) has a second guide hole on the top.

5. The automatic centering and feeding structure for stainless steel pipes used in drawing machines according to claim 4, characterized in that: Two groups of second guide columns (33) are evenly arranged on the left side of the bottom of the U-shaped guide rod (24), and first guide columns (32) are evenly arranged on the bottom of the first lifting platform (2).

6. The automatic centering and feeding structure for stainless steel pipes used in drawing machines according to claim 5, characterized in that: The first electric push rod (25) and the second electric push rod (29) are respectively arranged in the first installation slot and the second installation slot, and the second guide column (33) and the first guide column (32) are respectively arranged in the first guide hole and the second guide hole.

7. The automatic centering and feeding structure for stainless steel pipes used in drawing machines according to claim 2, characterized in that: A clearance opening is provided on the left side of the top of the first lifting platform (2), and a drawing die (31) is placed in the clearance opening. The drawing die (31) is fixed to the top of the support platform (11) by bolts.

8. The automatic centering and feeding structure for stainless steel pipes used in drawing machines according to claim 7, characterized in that: The centering ring (22) is fixed on the right side of the drawing die (31) by means of bolts, and the centering ring (22) is aligned with the drawing die (31).

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