Straightening mechanism of coil pipe straightening cut-off machine

Abstract

The utility model discloses a straightening mechanism of a coil pipe straightening cut-off machine, which comprises a main machine frame, a straightening mechanism, a traction mechanism and a cut-off mechanism are sequentially arranged on the main machine frame, the straightening mechanism is sequentially divided into a rough straightening section and a fine straightening section along the transmission direction of a coil pipe, and an adjusting mechanism for mechanically adjusting curvature is arranged outside the fine straightening section. According to the utility model, the adjusting mechanism is matched with the curve adjusting plate, so that manual adjustment is changed into mechanical adjustment more quickly and conveniently, and the straightening and cutting process is adjustable and more practical; through structural optimization, the occupied space of equipment is reduced, and the manufacturing cost of the equipment is reduced; the adjusting mechanism is matched with the straightening beam and the straightening die, the curvature of a straightening route is changed, the device is suitable for more inner coil pipes made of stainless steel and titanium materials, and the speed and straightness performance can be both considered.

Description

Technical Field

[0001] The utility model relates to the technical field of straightening and cutting machines, and more specifically, to a straightening mechanism of a coiled pipe straightening and cutting machine. Background Art

[0002] Pipe straightening is of great significance in the manufacture and use of coiled pipes. Coiled pipes are relatively low in purchase price, convenient for transportation and stockpiling, and have less waste. Especially in the automotive and air-conditioning industries, small-diameter coiled pipes are widely used. Coiled pipes are generally pipes several kilometers long wound around a coil. Before use, they need to be straightened in advance and then cut into specified lengths. Coiled pipes are generally made of materials such as copper, aluminum, titanium, and stainless steel.

[0003] There are two existing methods for pipe straightening:

[0004] The first one is as Figure 2 shown in Figure 2 the working principle diagram. This equipment gradually reduces the bend of the pipe fittings in the horizontal and vertical directions through two sets of mutually perpendicular wheel groups. The advantage of this method is that the straightening equipment does not need to rotate during the whole straightening process. The disadvantage is that the roundness of the pipe after straightening will decrease and the straightness is not ideal. The higher the yield strength of the pipe, the more obvious the defect.

[0005] The second one is as Figure 3 shown in Figure 3 the working principle diagram. This equipment straightens the pipe fittings by squeezing them with rotating hyperbolic rollers, accelerates the pipe fittings to make them rotate along the axis, and straightens all directions of the pipe fittings. The straightness and roundness of the pipe fittings after straightening are both ideal, and slight depressions on the surface can also be repaired. However, the pipe diameter will increase and the length will shorten. The thinner the pipe wall, the more serious the situation. Moreover, during the straightening process, the pipe fittings move at high speed in a follow-up manner, and only straight pipes with short lengths can be straightened.

[0006] A common disadvantage of the above two methods is that they both require manual machine adjustment, manually correct the wheel group or wire rollers, which takes a long time. Moreover, once the type of pipe fittings changes, the straightness will change, and corresponding adjustments, observations, and then fine-tuning are required, which is very inconvenient. Content of the Utility Model

[0007] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide a straightening mechanism of a coiled pipe straightening and cutting machine to solve one or more of the above problems.

[0008] To achieve the above purpose, the utility model provides the following technical solutions:

[0009] The straightening mechanism of a coiled pipe straightening and cutting machine includes a main machine frame. On the main machine frame, a straightening mechanism, a traction mechanism, and a cutting mechanism are successively arranged. The straightening mechanism is successively divided into a rough straightening section and a fine straightening section along the transmission direction of the coiled pipe. An adjusting mechanism for mechanically adjusting the curvature is arranged outside the fine straightening section.

[0010] The fine straightening section is provided with a straightening beam. The straightening beam is rotatably arranged on the main machine frame. The inside of the straightening beam is hollow and is provided with a die groove that penetrates through the front and back. A movable straightening die is arranged in the die groove.

[0011] Curvature adjusting plates are symmetrically arranged at the opposite ends of the straightening beam. A plurality of obliquely guiding grooves that penetrate through the front and back are arranged on the surface of the curvature adjusting plate. The overall path of the obliquely guiding grooves is arranged along a wavy line path. Both ends of the straightening die are movably inserted into the obliquely guiding grooves.

[0012] An adjusting mechanism is further arranged on the main machine frame. The adjusting mechanism is fixedly connected to the curvature adjusting plate. The adjusting mechanism drives the curvature adjusting plate and the straightening die to move in the die groove.

[0013] The adjusting mechanism includes

[0014] A collar frame, which is fixedly connected to the curvature adjusting plate;

[0015] Two lead screws, which are symmetrically threaded through the opposite ends of the collar frame;

[0016] Two adjusting wheels, which are correspondingly arranged at the same-side ends of different lead screws;

[0017] An intermediate rotating wheel, which is arranged on the main machine frame;

[0018] An adjusting belt, which is sleeved outside the adjusting wheel and the intermediate rotating wheel.

[0019] Further, the rough straightening section is provided with a guiding nylon. The guiding nylon is arranged on the main machine frame, and a self-lubricating POM round rod with holes is arranged inside it.

[0020] Further, the guiding nylon is drilled at the center, and the diameter of the drilled part is larger than the diameter of the coiled pipe.

[0021] Further, the collar frame is composed of two collar bearings and a connecting frame. The inner rings of the two collar bearings are fixedly connected to the curvature adjusting plate.

[0022] Further, an external motor drives the intermediate rotating wheel to rotate. Through the adjusting belt and the adjusting wheel, the lead screw is driven to rotate, driving the collar frame to move left and right relative to the straightening beam.

[0023] Further, the slopes of the obliquely guiding grooves are different, and the number of the straightening dies is five.

[0024] Taking the unit distance, the upper part is positive and the lower part is negative. The distance ratio of the five molds to the coil transmission path is +1: -2: +2: -2: +1.

[0025] In summary, the utility model has the following beneficial effects:

[0026] Through the cooperation of the adjustment mechanism and the straightening plate, it realizes the transformation from manual adjustment to mechanical adjustment, which is more rapid and convenient, and adjustable during the straightening and cutting process, making it more practical; through structural optimization, it reduces the space occupied by the equipment and lowers the manufacturing cost of the equipment; through the cooperation of the adjustment mechanism, the straightening beam and the straightening mold, it changes the curvature of the straightening route, and is applicable to more coils including stainless steel and titanium materials, and can take into account both speed and straightness performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment provided by the present invention;

[0028] Figure 2 It is a structural diagram of an existing technology equipment provided by the present invention;

[0029] Figure 3 It is a structural diagram of another existing technology equipment provided by the present invention;

[0030] Figure 4 It is a schematic plan view of the mainframe rack part of an embodiment provided by the present invention;

[0031] Figure 5 It is a schematic plan view of the straightening mechanism of an embodiment provided by the present invention;

[0032] Figure 6 It is a schematic plan view of the straightening plate of an embodiment provided by the present invention;

[0033] Figure 7 It is a sectional view of the straightening beam structure of an embodiment provided by the present invention;

[0034] Figure 8 It is a three-dimensional schematic diagram of the adjustment mechanism of an embodiment provided by the present invention;

[0035] Figure 9 It is a side view of the traction mechanism of an embodiment provided by the present invention;

[0036] Figure 10 It is a front view of the traction mechanism of an embodiment provided by the present invention;

[0037] Figure 11 It is a three-dimensional schematic diagram of the distance adjustment mechanism of an embodiment provided by the present invention;

[0038] Figure 12 Schematic three-dimensional view of a measuring mechanism according to an embodiment provided by the present invention;

[0039] Figure 13 Schematic plan view of a cutting mechanism according to an embodiment provided by the present invention;

[0040] Figure 14 Structural sectional view of a cutting mechanism according to an embodiment provided by the present invention;

[0041] Figure 15 Schematic side view of a blanking mechanism according to an embodiment provided by the present invention;

[0042] Figure 16 Schematic plan view of a positioning mechanism according to an embodiment provided by the present invention.

[0043] In the figure: 10, main machine frame; 20, blanking frame; 30, blanking mechanism; 31, blanking cylinder; 32, semi-circular pipe seat; 33, hinge; 40, positioning mechanism; 50, straightening mechanism; 51, guiding nylon; 52, straightening beam; 521, die groove; 53, adjusting mechanism; 531, collar frame; 532, lead screw; 533, adjusting wheel; 534, intermediate runner; 535, adjusting belt; 54, bending plate; 541, inclined guiding groove; 55, straightening die; 56, power input mechanism; 571, inlet support bearing seat; 572, outlet support bearing seat; 573, straightness adjusting cylinder; 574, dynamic and static conversion bearing; 575, position adjusting guiding slider; 60, traction mechanism; 61, traction seat; 611, traction wheel; 612, track support seat; 613, track pressing seat; 62, synchronous track; 621, coil groove; 63, traction driving mechanism; 631, traction driving motor; 632, coupling; 633, traction reducer; 64, distance adjusting mechanism; 641, push-pull cylinder; 642, distance adjusting rack; 643, distance adjusting gear; 644, eccentric shaft; 70, measuring mechanism; 71, encoder; 72, length measuring wheel; 73, tension spring; 80, cutting mechanism; 81, front clamping cylinder; 82, rotary cutting main shaft; 821, cutting circular blade; 83, feed mechanism; 831, tapered sleeve; 832, feed push cylinder; 833, feed push rod; 834, feed slider; 84, rear clamping cylinder. Detailed implementation manners

[0044] Example:

[0045] The following further describes the present invention in detail with reference to Figure 1 -16.

[0046] The coil straightening and cutting machine, as Figure 1As shown, the feeding and transmission are carried out in the order from left to right, and all components and mechanisms are aligned with the transmission axis of the coil pipe. The components and mechanisms are arranged relying on the frame part, and the frame part includes a separated main frame 10 and a blanking frame 20.

[0047] As Figure 1 shown, a number of blanking mechanisms 30 are arranged at equal intervals on the main shaft of the blanking frame 20. The blanking mechanism 30 can open and close itself. During transmission, it closes to guide and restrict the transportation of the coil pipe, and opens in time when cutting to release the cut straight coil pipe fittings of a specified length for blanking. A detachable positioning mechanism 40 is also arranged on the blanking frame 20. The positioning mechanism 40 is a buffer trigger, which plays a buffering role for the coil pipe and sends a signal for cutting after contact. The setting of the positioning mechanism 40 is adjusted according to the length of the coil pipe required by the process.

[0048] As Figure 4 shown, a straightening mechanism 50, a traction mechanism 60, a measuring mechanism 70 and a cutting mechanism 80 are successively arranged on the main frame 10 along the transmission axis direction. The straightening mechanism 50 is the core mechanism of the equipment, which is used to straighten the coil pipe, adjust and straighten the bent coil pipe and send it to the next mechanism. The traction mechanism 60 is an intermediate mechanism, which mainly plays the role of traction and transmission. After the coil pipe is introduced by the straightening mechanism 50, it provides the main traction power to make the coil pipe smoothly transport along the transmission axis, and also plays a certain role in straightening and polishing. The measuring mechanism 70 is mainly used to measure the travel of the coil pipe. As a ranging device, it helps to accurately control the cutting length. It mainly plays two roles. One is to send a signal to the cutting mechanism 80 in time when the length of the coil pipe sent into the blanking frame 20 exceeds the predetermined length and the positioning mechanism 40 has not given a cutting signal yet; the other is to give a preparation signal for each action and decelerate in advance before reaching the real cutting state to avoid unnecessary jitter. For example, when the coil pipe enters 20 mm from the end of the cutting line, a signal is given, and the traction mechanism 60 and the straightening mechanism 50 start to decelerate and transmit, and slowly send the coil pipe to the specified length and position to avoid the jitter caused by sudden stop. The cutting mechanism 80 cuts the coil pipe in two cases: receiving the signal normally given by the blanking frame 20 part and the emergency signal given by the measuring mechanism 70.

[0049] Under normal circumstances, the coil pipe is led out by a conventional winding device, passes through the straightening mechanism 50, the traction mechanism 60, the cutting mechanism 80 and the blanking mechanism 30 in sequence, and finally abuts against the positioning mechanism 40. The positioning mechanism 40 gives a signal to control the cutting mechanism 80 to perform a cutting action. After cutting is completed, the blanking mechanism 30 releases the coil pipe, and the coil pipe falls onto the corresponding storage device.

[0050] Under abnormal conditions, the coil pipe passes through the straightening mechanism 50, the traction mechanism 60, the cutting mechanism 80 and the blanking mechanism 30 in sequence, without touching the positioning mechanism 40. However, the measuring mechanism 70 determines that the length of the coil pipe is already too long. The measuring mechanism 70 gives a signal to control the cutting mechanism 80 to perform a cutting action, and alarms to pause the operation of the equipment and wait for maintenance.

[0051] Specifically, such as Figure 5As shown in FIG. 7 , the straightening mechanism 50 includes a guide nylon 51, an inlet support bearing seat 571, a straightness adjustment cylinder 573, a dynamic-static conversion bearing 574, a position adjustment guide slider 575, a straightening beam 52, an outlet support bearing seat 572 and a power input mechanism 56. The guide nylon 51, the inlet support bearing seat 571, the straightening beam 52 and the outlet support bearing seat 572 are located on the transmission axis in sequence. The straightness adjustment cylinder 573, the dynamic-static conversion bearing 574 and the position adjustment guide slider 575 are all matching components of the straightening beam 52. The straightening beam 52 is also provided with a special adjustment mechanism 53. The straightening beam 52 is rotatably arranged on the main frame 10 through the inlet support bearing seat 571 and the outlet support bearing seat 572. The main frame 10 is also provided with a power input mechanism 56, which drives the straightening beam 52 to rotate. The straightness adjustment cylinder 573, the static-dynamic conversion bearing 574 and the position adjustment guide slider 575 are all set to prevent the position deviation of the related parts when the straightening beam 52 rotates. The specific connection structure and principle belong to the prior art and will not be described in detail. The guide nylon 51 belongs to the rough straightening section. It is a POM round rod with self-lubricating function. The hole is drilled in the middle. The hole diameter is 3% larger than the diameter of the coil. When the coil passes through it, the excessive curvature will be straightened and then sent to the fine straightening section where the straightening beam 52 is located. The straightening beam 52 is hollow inside and has five through mold grooves 521 in the front and back directions. A separate straightening mold 55 is correspondingly arranged in the mold grooves 521. A symmetrical bending adjustment plate 54 is added to the straightening beam 52. Five oblique guide grooves 541 are arranged on the bending adjustment plate 54. The oblique guide grooves 541 are arranged along the wavy path as a whole, that is, the five oblique guide grooves 541 are on the same wavy line. The inclination and size all comply with this path law. The inclination of each oblique guide groove 541 is different, and the inclination is related to the movement direction and distance of the preset straightening mold 55. The straightening mold 55 is inserted into the oblique guide groove 541 through the shafts at both ends, and the two ends of the straightening mold 55 can slide along the oblique guide groove 541. The straightening mold 55 can also be displaced forward, backward, left and right relative to the transmission axis in the mold groove 521. The straightening mold 55 is all horizontally arranged and a straightening cavity that runs through the left and right is opened in the center, that is, no matter how the oblique guide groove 541 is arranged, the straightening cavity is completely horizontal. An adjustment mechanism 53 is added to the bending plate 54, and the bending plate 54 is moved left and right by the sliding adjustment mechanism 53, thereby realizing the movement of the straightening mold 55 relative to the mold groove 521, and realizing mechanical rapid adjustment of the adjustment mold. The movement of the position can realize the regulation of the bending degree of the S-shaped route of the coil extrusion.However, the straightening beam 52 drives the straightening die 55 to move at high speed. Since the straightening die 55 is offset from the axis, a large centrifugal force will be generated, causing the equipment to vibrate. Therefore, it is necessary to reasonably distribute the positions of the five straightening dies 55 and correspondingly set the slope of the inclined guide groove 541: taking the distance of a standard unit as a moving unit, with the upward direction as the positive direction and the downward direction as the negative direction, the ratios of the moving directions and moving distances of the five dies are +1: -2: +2: -2: +1 in sequence. The centrifugal force effects of the first, third, and fifth straightening dies 55 cancel out the centrifugal force effects of the second and fourth straightening dies 55, and there will be almost no vibration during the operation process.

[0052] As Figure 8 shown in the figure, the adjusting mechanism 53 includes a collar frame 531, two lead screws 532, two adjusting wheels 533, a middle transfer wheel 534, and an adjusting belt 535. The collar frame 531 is composed of two collar bearings arranged front and back and a fixedly connected frame body. The inner ring of the collar bearing is fixedly connected to the bending plate 54. The characteristics of the bearing enable the bending plate 54 to rotate with the straightening beam 52, that is, the left and right adjustment actions do not interfere with the normal rotation of the bending plate 54. The two lead screws 532 are symmetrically passed through both ends of the collar frame 531, and an adjusting wheel 533 is provided at the end of each lead screw 532. The middle transfer wheel 534 is correspondingly fixedly arranged on the main machine frame 10. An adjusting belt 535 is sleeved outside the three rotating wheels. The external motor and reducer are connected to the middle transfer wheel 534, driving it to drive the two adjusting wheels 533 to rotate through the belt. The rotating action is changed into a displacement in the left and right directions through the threaded structure of the lead screw 532 and the collar frame 531, so as to realize the sliding of the collar frame 531 relative to the lead screw 532, and finally complete the left and right displacement of the bending plate 54 relative to the straightening beam 52. For example, in the normal state, the first, third, and fifth straightening dies 55 are located on the upper side of the transmission axis, and the second and fourth straightening dies 55 are located on the lower side of the transmission axis. When the bending plate 54 moves to the right, relative to the transmission axis, the first, third, and fifth straightening dies 55 move to the right and downward relative to the die groove 521 of the straightening beam 52, and the second and fourth straightening dies 55 move to the right and upward relative to the die groove 521. Generally, the straightening die 55 moves to the right and because the movement direction is the same as the transmission direction, the straightening die 55 moves to the right as a whole and continuously approaches the transmission axis. Vice versa.

[0053] As Figure 9As shown in FIG. - 11, the traction mechanism 60 includes two traction seats 61, a set of distance adjustment mechanisms 64, and a set of traction drive mechanisms 63. The two traction seats 61 are arranged vertically opposite to each other. Each traction seat 61 includes a crawler support seat 612 at the far end and a crawler pressing seat 613 at the near end. The two traction seats 61 are connected by an auxiliary pressing frame. A pair of traction wheels 611 are arranged through the traction seat 61. A synchronous crawler 62 is sleeved outside the traction wheels 611, the crawler support seat 612, and the crawler pressing seat 613. A coil pipe groove 621 is formed on the synchronous crawler 62. The synchronous crawler 62 is tensioned and expanded outward by the crawler support seat 612 and the crawler pressing. The aligned coil pipe grooves 621 between the two sets of synchronous crawlers 62 can allow the coil pipe to pass through smoothly and make full contact to provide traction force. The traction drive mechanism 63 is connected to the traction runner in a matching manner. The traction drive mechanism 63 includes a corresponding traction drive motor 631, a coupling 632, a traction reducer 633, and a transmission gear set. The traction drive mechanism 63 drives the traction runner to rotate, driving the synchronous crawler 62 to move in a cycle. The upper and lower synchronous crawlers 62 both apply a rightward traction force to the passing coil pipe to enable its normal transportation. The upper and lower traction seats 61 are relatively close to or away from each other through the distance adjustment mechanism 64 to match coil pipes of different diameters. At the same time, in order to prevent components from being quickly worn, a row of bearings is provided at the near end of the crawler pressing seat 613, and the bearings are used to contact the synchronous crawler 62 and the coil pipe to extend the service life. The distance adjustment mechanism 64 includes a push - pull cylinder 641, a distance adjustment rack 642, two distance adjustment gears, and two eccentric shafts 644. The push - pull cylinder 641 is arranged at a suitable position on the main machine frame 10. The distance adjustment rack 642 is arranged at the movable end of the push - pull cylinder 641. The two distance adjustment gears 643 are arranged on the main machine frame 10 through a fixed frame and are symmetrically arranged at the upper and lower ends of the distance adjustment rack 642. An eccentric shaft 644 is coaxially arranged on the distance adjustment gear 643. The eccentric end of the eccentric shaft 644 is inserted into the adjustment groove of the corresponding traction seat 61. When the push - pull cylinder 641 moves, it drives the distance adjustment rack 642 to move horizontally, driving the distance adjustment gears 643 on both sides to rotate, mainly realizing the rotation of the eccentric shaft 644. A clamping part deviating from the axis is provided at the eccentric end of the eccentric shaft 644. This clamping part will move in a circular motion along with the movement, which is split into displacements in the vertical direction, and finally realizes the purpose of driving the corresponding traction seat 61 to move. The two traction seats 61 can approach or move away from each other, and the radial dimension of the coil pipe that can pass through after the combination of the coil pipe grooves 621 of the synchronous crawler 62 can be movable and adaptable.

[0054] As Figure 13 and Figure 14As shown, the cutting mechanism 80 includes a front clamping cylinder 81, a peeling spindle 82, a feed mechanism 83 and a rear clamping cylinder aligned in sequence, and the coil passes through the front clamping cylinder 81, the peeling spindle 82 and the rear clamping cylinder 84. The peeling spindle 82 is self-rotated by the motor and the transmission mechanism arranged on the main frame 10. The front clamping cylinder 81 and the rear clamping cylinder 84 are not involved in the coil transmission stage, and only clamp the coil in the cutting stage. The feed mechanism 83 is sleeved outside the rotary cutting main shaft 82, and a conical sleeve 831 is provided at the end of the feed mechanism 83. A tightenable cutting circular blade 821 is provided at the end of the rotary cutting main shaft 82. The cutting circular blade 821 is a circular sector-shaped blade with three petals distributed at equal intervals along a ring. The feed mechanism 83 moves toward the end along the rotary cutting main shaft 82, and the conical sleeve 831 contacts the outer end of the cutting circular blade 821 and continuously squeezes it to converge. Different blades are continuously gathered together to form a feed cutting action, and the rotating of the rotary cutting main shaft 82 is coordinated to rotary cut the passing coil. The feed mechanism 83 includes a feed push cylinder 832, a feed push rod 833 and a feed slide 834. The feed slide 834 is slidably arranged outside the rotary cutting main shaft 82, and the conical sleeve 831 is arranged at the end of the feed slide 834. A conical ring groove is provided at the front end of the feed slide 834. One end of the feed push rod 833 is connected to the movable end of the feed push cylinder 832, and the other end has a rotatable conical head and is embedded in the conical ring groove of the feed slide 834. The design of the conical head and the conical ring groove can smoothly realize the left and right push of the rotating part, so that the movement of the feed push cylinder 832 drives the feed push rod 833 to slide left and right, drives the feed slide 834 to move, and the conical sleeve 831 moves away from or close to the cutting circular blade 821, so that the cutting circular blade 821 is released or gathered, and the reset or cutting action is completed. The size and model of the cutting circular blade 821 can be replaced.

[0055] like Figure 12 As shown, the measuring mechanism 70 includes an encoder 71 and three meter wheels 72, all of which are arranged on the main frame 10 through a connecting frame. The encoder 71 and the meter wheels 72 are arranged at the front and rear ends of the coil transmission path. The three meter wheels 72 are arranged parallel to the transmission axis. The encoder 71 and the meter wheels 72 can both contact the coil. The encoder 71 is hooked on the connecting frame through a tensioning spring 73, so that the encoder 71 always remains fixed and does not rotate with the coil transportation, so as to better measure the data.

[0056] like Figure 15As shown in the figure, the blanking mechanism 30 includes a blanking cylinder 31, a set of hinges 33, and two semi-circular pipe seats 32 that can be joined together to form a complete closed pipe diameter. The blanking cylinder 31 and the hinges 33 are fixedly arranged on the blanking frame 20 correspondingly. The hinge points of the hinges 33 are fixed. One end of the hinge 33 is connected to the movable end of the blanking cylinder 31, and the other end is fixedly connected to a semi-circular pipe seat 32. The other semi-circular pipe seat is fixedly arranged on the blanking frame 20. The installation positions of the two semi-circular pipe seats 32 should meet the requirement that they are aligned after fitting to form a centrally closed pipe diameter structure, which can be achieved by adjusting the rod length of the corresponding hinge 33 and the fixed position of the semi-circular pipe seat 32. The blanking cylinder 31 expands and contracts, driving the hinges 33 to open or close, and then driving the two semi-circular pipe seats 32 to move away from or close to each other, so as to realize the corresponding blanking action.

[0057] As Figure 16 As shown in the figure, the positioning mechanism 40 is a simple trigger-type inductor with buffering performance, which can sense the touching action and buffer appropriately. The buffering is generally realized through elastic parts. After sensing the touch, it sends out a signal to perform the cutting action.

[0058] The coil is introduced along the transmission axis, first roughly adjusted by the guiding nylon 51, and then finely adjusted by the rotating straightening beam 52. As a whole, it continues to be transmitted under the drive of the traction mechanism 60, the traveling length is measured by the measuring mechanism 70, and it reaches the positioning mechanism 40 along the semi-circular pipe seat 32 on the blanking frame 20. After being touched, it sends out a signal, and the cutting mechanism 80 performs the cutting. The position of the straightening die 55 can be changed by driving the bending plate 54 to move left and right through the adjusting mechanism 53, so as to realize the curvature adjustment.

[0059] It should be noted that this specific embodiment is only an explanation of the present invention, and it does not limit the present invention. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. The straightening mechanism of a coil straightening and cutting machine, including a main machine frame (10), is characterized in that: The main machine frame (10) is successively provided with a straightening mechanism (50), a traction mechanism (60) and a cutting mechanism (80). The straightening mechanism (50) is successively divided into a rough straightening section and a fine straightening section along the transmission direction of the coil pipe. An adjusting mechanism (53) for mechanically adjusting the curvature is arranged outside the fine straightening section; The fine straightening section is provided with a straightening beam (52). The straightening beam (52) is rotatably arranged on the main machine frame (10). The interior of the straightening beam (52) is hollow and is provided with a die groove (521) that penetrates through the front and back. A movable straightening die (55) is arranged in the die groove (521); Relatively ends of the straightening beam (52) are symmetrically provided with bending plates (54). The surfaces of the bending plates (54) are provided with a plurality of inclined guide grooves (541) that penetrate through the front and back. The inclined guide grooves (541) are arranged along a wavy path as a whole. Both ends of the straightening die (55) are movably inserted into the inclined guide grooves (541); An adjusting mechanism (53) is further arranged on the main machine frame (10). The adjusting mechanism (53) is fixedly connected to the bending plate (54). The adjusting mechanism (53) drives the bending plate (54) and the straightening die (55) to move in the die groove (521); The adjusting mechanism (53) includes a collar frame (531) that is fixedly connected to the bending plate (54); two lead screws (532) that are symmetrically threadedly inserted into opposite ends of the collar frame (531); two adjusting wheels (533) that are correspondingly arranged at the same-side ends of different lead screws (532); a transfer wheel (534) that is arranged on the main machine frame (10); an adjusting belt (535) that is sleeved outside the adjusting wheels (533) and the transfer wheel (534).

2. The straightening mechanism according to claim 1, wherein: The rough straightening section is provided with a guiding nylon (51). The guiding nylon (51) is arranged on the main machine frame (10) and internally provided with a self-lubricating POM round rod with holes.

3. The straightening mechanism according to claim 2, characterized in that: A central hole is drilled in the guiding nylon (51), and the diameter of the drilled part is larger than the diameter of the coil pipe.

4. The straightening mechanism according to claim 1, wherein: The collar frame (531) is composed of two collar bearings and a connecting frame. Inner rings of the two collar bearings are fixedly connected to the bending plate (54).

5. The straightening mechanism according to claim 1, characterized in that: An external motor drives the transfer wheel (534) to rotate. By means of the adjusting belt (535) and the adjusting wheels (533), the lead screws (532) are driven to rotate, driving the collar frame (531) to move left and right relative to the straightening beam (52).

6. The straightening mechanism according to claim 1, wherein: The slopes of the inclined guide grooves (541) are different, and the number of the straightening dies (55) is five; Taking the unit distance as a reference, with the upper part being positive and the lower part being negative, the distance ratios of the five dies relative to the transmission path of the coil pipe are +1: -2: +2: -2: +1.

Images