Continuous feeding mechanism for micro-diameter pipes

Abstract

The present invention discloses a continuous feeding mechanism for micro-diameter pipes, comprising a main frame, a feeding frame arranged along the center line of the pipe at the end of the main frame, and characterized in that the main frame is provided with a straightening device, a belt conveying device is provided after the straightening device, and a cutting device is provided after the belt conveying device; a slapping device is provided on the feeding frame corresponding to the cutting device. During the whole feeding process, the micro-diameter pipe is pushed and conveyed by the friction force of the belt, so as to avoid the defects such as abrasion and indentation on the surface of the micro-diameter pipe, and at the same time, the micro-diameter pipe is further straightened to ensure that the length of the micro-diameter pipe is more accurately quantified, and the problem that the cutting point of the pipe body cannot be completely pulled away due to the residual burrs of the ring cutting is effectively solved, and the operation is automatic, safe and reliable.

Description

Technical Field

[0001] The invention relates to a micro-diameter tube manufacturing technology, in particular to a micro-diameter tube continuous feeding mechanism. Background Art

[0002] The automatic and continuous unloading of pipes mainly considers the problems of pipe transportation, fixed length and quantity, and material removal and separation. In the current technology, there are different unloading mechanism designs for pipes of different materials and different uses. For example, the patent publication number is CN107398730A, a pipe straightening and unloading machine, which is used for the synchronous straightening and cutting of linear metal pipes. It has a multi-roller offset straightening mechanism, and a guide device, a straightening device, a traction device, a stroke counting encoder, a cutting and pulling device, and a clamping device are set on the workbench. The cutting thrust block in the cutting device pushes the cutting sleeve, and the sleeve pushes the slider and the cutter and the support wheel on the slider to move radially to achieve cutting of the linear metal pipe. There are still many problems in the existing technologies for cutting and blanking micro-diameter tubes. First, the tubes are basically transported by special traction devices, and these traction devices use a clamping method to pull, so there is a certain amount of wear on the surface of the tubes. Second, because the wall thickness of the micro-diameter tubes is relatively thin, especially copper, aluminum and other tubes are soft in texture, after the rotating cutter head is ring-cut, it is inevitable that there will be residual burrs from the ring cutting, which makes it impossible to completely pull away the cutting point of the tube, resulting in the cut end not being completely separated from the moving end of the tube, and the tube cannot be blanked smoothly. This phenomenon will cause the tube to bend and deform or even be scrapped, otherwise it will require special personnel to supervise and manually separate. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and provide a continuous feeding mechanism for micro-diameter pipes, which has the characteristics of automatic soft traction, automatic soft hitting separation and scar-free feeding.

[0004] The above technical problems of the present invention are mainly solved by the following technical solutions: a continuous feeding mechanism for micro-diameter pipes, comprising a main frame and a feeding rack located at the end of the main frame and arranged along the center line of the pipe, wherein the main frame is provided with a straightening device, a belt conveyor device is provided after the straightening device, and a cutting device is provided after the belt conveyor device; a slapping device is provided on the feeding rack corresponding to the cutting device.

[0005] In the aforementioned continuous feeding mechanism for micro-diameter pipes, preferably, an encoder assembly is provided at the front end of the belt conveyor.

[0006] In the aforementioned continuous feeding mechanism for micro-diameter pipes, preferably, the slapping device includes a slapping motor, which drives a soft rubber stick arranged perpendicular to the center line of the pipe, and the rotation radius of the soft rubber stick exceeds the center line of the pipe by 5 mm.

[0007] In the aforementioned continuous feeding mechanism for micro-diameter pipes, preferably, the belt conveyor device is composed of two sets of belt groups symmetrically arranged above and below the center line of the pipe, and the two sets of belt groups have synchronous belts with upper and lower matching surfaces.

[0008] In the aforementioned continuous feeding mechanism for micro-diameter tubes, preferably, grooves are provided at the center of the widths of the upper and lower sets of synchronous belts, and the width of the grooves is greater than or equal to the diameter of the micro-diameter tubes.

[0009] In the aforementioned continuous feeding mechanism for micro-diameter pipes, preferably, the two sets of belt groups include synchronous belts connecting the driving wheel and the driven wheel, and a tensioning wheel group is provided between the driving wheel and the driven wheel, and the tensioning wheel group has a vertical adjustment device.

[0010] In the aforementioned continuous feeding mechanism for micro-diameter pipes, preferably, the tensioning wheel group includes at least two single wheels, and the single wheels are toothed wheels that cooperate with the synchronous belt.

[0011] In the aforementioned continuous feeding mechanism for micro-diameter pipes, preferably, the straightening device includes a group of horizontal straightening wheels and vertical straightening wheels located behind the horizontal straightening wheels, and a feed sleeve is provided in front of the horizontal straightening wheels.

[0012] In the aforementioned continuous feeding mechanism for micro-diameter pipes, preferably, the cutting device includes a rotating head assembly, a rear clamping seat is provided at the feeding end of the rotating head assembly, and a pull-off clamping seat is provided at the output end of the rotating head assembly.

[0013] In the aforementioned continuous feeding mechanism for micro-diameter pipes, preferably, the slapping device includes a slapping motor, which is shared with the PLC pulling-off relay of the pipe clamp seat. While pulling off, the slapping motor is started, and after a delay of 2s through the time relay, the slapping motor stops working, completing a cycle.

[0014] This technical solution is designed as a whole based on the characteristics of commonly used micro-diameter tubes (diameter generally refers to 1.8-8mm) made of copper, aluminum and other materials and the problems existing in the cutting process. The entire unloading mechanism is divided into two parts: the main frame and the blanking rack. The center line of the pipe is used as the layout basis of various functional parts. The main frame is equipped with multiple straightening devices, friction belt conveyor devices and cutting devices from the pipe inlet, and the blanking rack part is mainly a slapping device.

[0015] The straightening device is composed of a set of horizontal straightening wheels and a set of vertical straightening wheels connected in series, which make uniform linear corrections to the entire circumference of the micro-diameter tube. The belt conveyor is composed of two sets of belt groups arranged symmetrically on the upper and lower sides. The belt adopts a synchronous belt. The center of the synchronous belt width is provided with a groove with a width that matches the micro-diameter tube. The micro-diameter tube is driven forward by the rotation of the belt, that is, the friction between the belt and the micro-diameter tube drives the micro-diameter tube to move forward at a uniform speed. The design of the belt groove will not produce a lot of pressure on the micro-diameter tube, causing the tube body to deform, and it also has the effect of further straightening the tube. This linear conveying with higher friction makes the quantitative length of the micro-diameter tube more accurate. After the belt conveyor, the encoder assembly is used to determine the length and count the cut micro-diameter tube.

[0016] Furthermore, the two belt sets are respectively provided with a tensioning wheel set, which is arranged between the driving wheel and the driven wheel, and mainly adjusts the tightness of the upper and lower synchronous belts on the micro-diameter tube. Two or more upper and lower single-sided tensioning wheel sets are arranged along the running direction of the micro-diameter tube to ensure that the belt has a larger plane friction area to contact the micro-diameter tube.

[0017] In the cutting device part, when the rear clamp seat and the pull-away clamp seat clamp the micro-diameter tube at the same time, the rotating head assembly is responsible for circular cutting of the micro-diameter tube. When the cutting action is completed, the pull-away clamp seat clamps the micro-diameter tube and moves forward one station. At this time, the micro-diameter tube is pushed by the rear tube body to move the cutting point out of the pull-away clamp seat and into the blanking area. The action is continuous and natural.

[0018] The slapping device is driven by a soft glue stick with a safe voltage. The soft glue stick is arranged perpendicular to the center line of the pipe. When the clamping seat is pulled away to clamp the micro-tube for output each time, the soft glue stick continuously performs a rotational slapping action on the moving micro-tube, which does not affect the normal passage of the pipe and can easily slap the cut end without causing any damage to the micro-tube, allowing the cut micro-tube to fall off smoothly. The preferred length of the soft glue stick is that the rotation radius of the stick exceeds the center line of the pipe by 5mm to avoid affecting other components.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: during the entire material feeding process, the micro-diameter tube is pushed and transported by the friction force of the belt, thereby avoiding wear and tear on the surface of the micro-diameter tube, producing defects such as indentations, and further straightening the micro-diameter tube to ensure that the length of the micro-diameter tube is more accurately quantified, effectively solving the problem that the cutting point of the tube body cannot be completely pulled away due to residual burrs from ring cutting, and the operation is automatic, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a structural schematic diagram of a straightening device of the present invention.

[0022] Figure 3 A schematic structural diagram of a belt conveyor device of the present invention.

[0023] Figure 4 It is a schematic structural diagram of a cutting device of the present invention.

[0024] Figure 5 Figure 6 It is a schematic diagram of the structure of a slapping device of the present invention.

[0025] Figure 7 It is the electrical control diagram of the slapping device of the present invention.

[0026] In the figure: 1. main frame, 2. blanking rack, 3. straightening device, 301. feed sleeve, 302. horizontal straightening wheel, 303. vertical straightening wheel, 4. belt conveyor, 401. pipe feeding seat, 402. driving wheel, 403. synchronous belt, 404. tensioning wheel group, 405. adjustment device, 5. encoder assembly, 6. cutting device, 601. rear clamping seat, 602. rotating head assembly, 603. pull-away clamping seat, 604. slide rail, 7. slapping device, 701. slapping motor, 702. soft glue stick, 8. pipe cutting motor, 9. pipe delivery center line. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0028] See also Figure 1 The present embodiment is a continuous feeding mechanism for micro-diameter pipes, which is composed of a main frame 1 and a feeding frame 2 located at the end of the main frame 1 and arranged along the center line 9 of the pipe as the main body of the mechanism.

[0029] The main frame 1 is composed of three parts: a straightening device 3, a belt conveying device 4 behind the straightening device 3, and a cutting device 6 behind the belt conveying device 3. The blanking frame 2 is mainly composed of a slapping device 7 and a blanking chute.

[0030] The straightening device 3 includes a set of horizontal straightening wheels 302, which are composed of 5 pairs of single wheels arranged horizontally and notched to notch; the horizontal straightening wheels 302 are followed by vertical straightening wheels 303, which are composed of two rows of single wheels arranged in upper and lower rows, with 3 wheels in the upper row and 4 wheels in the lower row. A ceramic feed sleeve 301 is provided at the front end of the horizontal straightening wheel 302.

[0031] See also Figure 3The belt conveyor 3 includes a pipe delivery seat 401 fixed on the main frame 1. The belt conveyor 4 is arranged in the pipe delivery seat 401 and is composed of two sets of belt groups arranged symmetrically on the upper and lower sides of the pipe delivery center line 9. The two sets of belt groups have synchronous belts 403 with upper and lower surfaces that match each other. The central parts of the width of the upper and lower synchronous belts 403 are provided with grooves, the width of the grooves is greater than or equal to the diameter of the micro-diameter tube, and the depth of the grooves is about one-third of the diameter of the micro-diameter tube. The basic structure of the two sets of belt groups is similar, including synchronous belts 403 connecting the driving wheel 402 and the driven wheel. A tensioning wheel group 404 is provided between the driving wheel 402 and the driven wheel. The tensioning wheel group 404 has three single wheels on the upper and lower sides, and the single wheels are also toothed wheels that match the synchronous belt 403. The tensioning wheel groups of the upper and lower parts are both provided with vertical direction adjustment devices 405. When in use, the lower tensioning wheel is aligned with the groove on the top surface of the belt and the center line 9 of the pipe delivery. The tensioning wheel of the upper part is adjusted by the adjustment device 405 to adjust the tightness. An encoder assembly 5 is provided at the front end (output end) of the belt conveyor 4 for counting.

[0032] The cutting device 6 includes a rotating head assembly 602, such as Figure 4 As shown, the rotating head assembly 602 is powered by the tube cutting motor 8, and the micro-diameter tube passes through the rotating head assembly 602 and the rotating cutter head, and is cut radially from the outside to the inside by the rotating cutter head. A rear clamping tube seat 601 is provided at the feeding end of the rotating head assembly 602, and a pull-away clamping tube seat 603 is provided at the output end of the rotating head assembly 602. The rear clamping tube seat 601 and the pull-away clamping tube seat 603 clamp the micro-diameter tube at the same time during cutting, and both clamping tube seats are released. At the same time, the pull-away clamping tube seat 603 is positioned and moved forward by the slide rail 604 under the drive of the cylinder. At this time, the cut micro-diameter tube is pushed to the outside of the pull-away clamping tube seat 603 by the micro-diameter tube that continuously moves forward at the back.

[0033] See also Figure 5 , Figure 6 The slapping device 7 includes a bracket, and the slapping motor 701 is installed on the bracket. The slapping motor 701 drives the soft glue stick 702 arranged perpendicular to the center line 9 of the pipe. The rotation radius of the soft glue stick 702 exceeds the center line of the pipe by 5mm. The slapping device 7 is shared with the PLC pull-off relay of the pull-off clamp 603. The control diagram is shown in FIG. Figure 7 As shown, while pulling away, the slapping motor 7 is started, and after a delay of 2s through the time relay, the slapping motor 7 stops working, the micro-diameter tube is completely detached, and a cycle is completed. In practical applications, the speed of the slapping motor 7 is 60-100 revolutions per minute, and a 24V DC speed regulating motor is used to meet the slapping number requirements during the pause time, which is energy-saving and safe.

[0034] This embodiment is most suitable for micro-tubes with a specification of 4.0 to 8.0 mm, and can also be used for capillaries with a specification of 1.8 to 4.0 mm.

[0035] The above embodiments are for explanation of the present invention, not for limitation of the present invention. For example, the main frame and the blanking rack are an integrated stand, the beating part of the soft glue stick 702 is a flat web structure, etc. Any method or structure after simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A continuous feeding mechanism for micro-diameter pipes, comprising a main frame (1), a feeding frame (2) located at the end of the main frame and arranged along the center line (9) of the pipe, wherein the feeding frame is characterized in that The main frame is provided with a straightening device (3), a belt conveying device (4) is provided behind the straightening device, and a cutting device (6) is provided behind the belt conveying device; a slapping device (7) is provided on the blanking frame corresponding to the cutting device; The slapping device (7) comprises a slapping motor (701), which drives a soft rubber stick (702) arranged perpendicularly to the center line of the pipe (9), and the rotation radius of the soft rubber stick exceeds the center line of the pipe by 5 mm; The cutting device (6) comprises a rotating head assembly (602), a rear pipe clamping seat (601) is provided at the feeding end of the rotating head assembly, and a pulling-off pipe clamping seat (603) is provided at the output end of the rotating head assembly; The slapping device is shared with the PLC pulling-off relay for pulling off the pipe clamping seat. When pulling off, the slapping motor is started. After a delay of 2s through the time relay, the slapping motor stops working, completing a cycle.

2. The micro-diameter tube continuous feeding mechanism according to claim 1, characterized in that: An encoder assembly (5) is provided at the front end of the belt conveyor device (4).

3. The micro-diameter tube continuous feeding mechanism according to claim 1, characterized in that: The belt conveyor device (4) is composed of two sets of belt groups symmetrically arranged above and below the center line (9) of the conveying pipe, and the two sets of belt groups have synchronous belts (403) with upper and lower surfaces matching each other.

4. The micro-diameter tube continuous feeding mechanism according to claim 3, characterized in that: A groove is provided at the center of the width of the upper and lower sets of synchronous belts (403), and the width of the groove is greater than or equal to the diameter of the micro-diameter tube.

5. The micro-diameter tube continuous feeding mechanism according to claim 3, characterized in that: The two sets of belt sets include a synchronous belt (403) connecting a driving wheel (402) and a driven wheel, and a tensioning wheel set (404) is provided between the driving wheel and the driven wheel, and the tensioning wheel set has a vertical direction adjustment device (405).

6. The micro-diameter tube continuous feeding mechanism according to claim 5 is characterized in that: The tension wheel assembly (404) comprises at least two single wheels, and the single wheels are toothed wheels that cooperate with the synchronous belt (403).

7. The micro-diameter tube continuous feeding mechanism according to claim 1 is characterized in that: The straightening device (3) comprises a group of horizontal straightening wheels (302) and vertical straightening wheels (303) located behind the horizontal straightening wheels, and a feed sleeve (301) is provided in front of the horizontal straightening wheels.

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