CN108225808B - Device and method for testing durability of pipe shear - Google Patents

Abstract

The invention discloses a device and a method for testing the durability of a pipe shear, wherein the device for testing the durability of the pipe shear comprises: a pipe shearing clamp; the driving device is used for driving the pipe shears to clamp or open; the pipe conveying device is used for conveying pipes into the pipe shears in sequence; and the driving device and the pipe conveying device are electrically connected with the controller. The pipe shear durability test method comprises the following steps: step S10: fixing the pipe shears to a pipe shear clamp, and meanwhile, placing the pipe on a pipe conveying device; step S20: starting testing, and conveying the pipe into the pipe shear by the pipe conveying device; step S30: the driving device drives the movable handle to enable the pipe shears to gradually clamp the pipe until the pipe is sheared; step S40: the driving device drives the movable handle to open the pipe shears; step S50: repeating the steps S20 to S40 for several times until the preset number of tests is reached. The invention can automatically test the durability of the pipe shears, effectively reduce manual operation and improve the testing efficiency.

Description

Device and method for testing durability of pipe shear

Technical Field

The invention relates to the technical field of workpiece testing, in particular to a device and a method for testing the durability of a pipe shear.

Background

A pipe cutter is a tool for cutting a pipe, which is one of necessary tools in pipe installation. A pipe shears generally includes a fixed handle, a movable handle, and a blade. In the process of cutting the pipe, the movable handle needs to be repeatedly and tightly held to drive the movable handle to repeatedly act, so that the pipe is gradually clamped by the blade. After the cutting is finished, the movable handle can be broken in the direction away from the fixed handle. The pipe is cut and often appears blade dull, the mouth that bursts at, roll up mouthful and pipe and cut spring inefficacy scheduling problem in the use, and the installation effect of pipeline is directly influenced to its quality, consequently need test the durability of pipe cutting. Most of the traditional pipe shear test methods are that pipe shears are operated manually for multiple times, and then whether the pipe shears used for multiple times have quality problems or not is judged. The traditional testing method has high manual operation intensity and low testing efficiency.

Disclosure of Invention

Based on this, embodiments of the present invention provide a device and a method for testing the durability of a pipe cutter, which can automatically test the durability of the pipe cutter, effectively reduce manual operations, and improve the testing efficiency.

In order to achieve the purpose, the embodiment of the invention adopts the following technical scheme:

the first aspect of the embodiments of the present invention provides a pipe shear durability testing apparatus, including:

the pipe shearing clamp is used for clamping a fixed handle of the pipe shear;

the driving device is used for driving the movable handle of the pipe shears to act so as to clamp or open the pipe shears;

the pipe conveying device is used for conveying pipes into the pipe shears in sequence; and

and the driving device and the pipe conveying device are electrically connected with the controller.

Further, drive arrangement include with the equal electric connection's of controller first actuating mechanism and second actuating mechanism, the pipe is cut the anchor clamps with relative setting from top to bottom of first actuating mechanism, the pipe is cut and is located first actuating mechanism with between the anchor clamps is cut to the pipe, first actuating mechanism is used for towards the direction of fixed handle is repeated to promote movable handle makes the pipe is cut and is pressed from both sides tight tubular product gradually, second actuating mechanism is used for when tubular product is cut the movable handle towards keeping away from the direction of fixed handle removes makes the pipe is cut and opens.

Further, the first driving mechanism comprises a first air cylinder electrically connected with the controller, the first air cylinder is arranged under the movable handle, the second driving mechanism is arranged on the left side or the right side of the pipe shear, the second driving mechanism comprises a supporting rod, a second air cylinder and a third air cylinder, the second air cylinder and the third air cylinder are electrically connected with the controller, the second air cylinder is used for driving the supporting rod to enter or exit between the fixed handle and the movable handle, and the third air cylinder is used for driving the supporting rod to move up and down.

Further, the pipe conveying device comprises a clamping mechanism and a transfer mechanism which are electrically connected with the controller, the clamping mechanism is arranged on the transfer mechanism and used for clamping or releasing the pipe, and the transfer mechanism is used for driving the clamping mechanism to be close to or far away from the pipe shears.

Further, the transfer mechanism comprises a motor electrically connected with the controller and a screw and nut mechanism connected with the motor, and a driving end of the screw and nut mechanism is connected with the clamping mechanism.

Furthermore, the pipe straightening device further comprises a straightening mechanism electrically connected with the controller, the straightening mechanism is arranged on the feeding side of the pipe conveying device, and the straightening mechanism is used for straightening the bent pipes.

Further, still include rotatable tubular product tray, tubular product wind locate on the tubular product tray, the tubular product tray is located tubular product conveyor's the side of feeding.

Further, still include the frame, the tubular product tray tubular product conveyor the anchor clamps are cut to the pipe and drive arrangement all locates on the frame, just the tubular product tray tubular product conveyor and the anchor clamps are cut to the pipe set gradually.

The pipe shear further comprises a first photoelectric sensor, the first photoelectric sensor is used for detecting whether the pipe shear is opened or not, and the first photoelectric sensor is electrically connected with the controller; the pipe shear is used for cutting a pipe into pieces, and the pipe shear is used for cutting the pipe into pieces; the device comprises a controller, and is characterized by further comprising a third photoelectric sensor, wherein the third photoelectric sensor is used for detecting whether the pipe is used up or not, and is electrically connected with the controller.

The second aspect of the embodiments of the present invention provides a method for testing the durability of a pipe shear, including the following steps:

step S10: preparing before testing, namely fixing the pipe shears on a pipe shear clamp, opening the pipe shears in advance, and meanwhile, placing the pipe in a pipe conveying device;

step S20: starting testing, and conveying the pipe into the pipe shear by the pipe conveying device;

step S30: the driving device drives the movable handle to enable the pipe shears to gradually clamp the pipe until the pipe is sheared;

step S40: the driving device drives the movable handle to open the pipe shears;

step S50: and repeating the steps S20 to S40 for a plurality of times until the preset test times are reached, and completing the test.

Embodiments of the invention include the following advantages, however, it is not necessary for any product embodying the invention to achieve all of the following simultaneously:

1. according to the pipe shear durability testing device and method, the pipe shear can be fixed through the pipe shear clamp, and the driving device drives the movable handle to move, so that the pipe shear is opened or closed, and the cutting action is realized. After finishing once cutting, the pipe is automatically conveyed into the pipe shears by the pipe conveying device, the driving device drives the movable handle to act repeatedly, further, the cutting action is performed again, and the quality problem of the pipe shears is judged after the pipe shears are cut repeatedly, so that the durability test of the pipe shears is realized, the pipe shears do not need to be operated manually, the labor intensity is greatly reduced, and the test efficiency is effectively improved. Meanwhile, the controller is used, so that the actions of all the mechanisms are coherent, and the whole testing process is promoted to further realize automation.

2. The driving device for driving the movable handle comprises a first driving mechanism and a second driving mechanism, the first driving mechanism is used for repeatedly driving the movable handle, and the pipe is cut off by the blade after the movable handle is driven for many times. The second driving mechanism is used for driving the movable handle to move towards the direction far away from the fixed handle after the pipe is cut off, so that the blade moves towards the direction far away from the pipe support part, and the pipe cutter is opened. The first driving mechanism and the second driving mechanism respectively act independently and are matched with each other in a mutual correlation manner, so that the pipe shears can be opened and clamped, and the pipe shears are easy to control.

3. When the pipe shears need to be opened, the second cylinder drives the abutting rod to enter the pipe shears, and then the third cylinder drives the abutting rod to move downwards, so that the movable handle moves downwards, and the blade moves upwards to be away from the pipe support part. In order to prevent the butting rod from influencing the follow-up movable handle to clamp the pipe, the butting rod withdrawing pipe shear needs to be driven to reset through the third cylinder and the second cylinder.

4. The pipe conveying device is further provided with a clamping mechanism, the clamping mechanism is used for driving the pipe to advance on one hand, and on the other hand, the clamping mechanism can be used for clamping the pipe in the pipe cutting process, so that the pipe is prevented from moving and failure in pipe cutting is avoided.

5. The straight clamping mechanism is used for clamping and straightening a bent pipe, so that the pipe entering the pipe shear is ensured to be a straight pipe, and the pipe shear is convenient to cut. Meanwhile, the pipe can be rolled and stacked by the arrangement of the straight clamping mechanism, so that the pipe with longer length is prevented from occupying a larger working site.

6. The pipe tray is used for winding and storing pipes, occupied space of the pipes is reduced, the pipe tray can rotate, and resistance of pipe release can be reduced.

7. The first photoelectric sensor, the second photoelectric sensor and the third photoelectric sensor are used for providing triggering information before each corresponding mechanism executes actions, and the action execution is guaranteed to be orderly and error-free.

Drawings

FIG. 1 is a schematic structural diagram of a pipe cutter according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a pipe shear durability testing apparatus according to an embodiment of the present invention;

FIG. 3 is a front view of the pipe shear durability testing apparatus shown in FIG. 2;

FIG. 4 is a top view of the pipe shear durability test apparatus shown in FIG. 2;

FIG. 5 is a view showing the assembly of the pipe cutter shown in FIG. 1 with the clamp and the first cylinder shown in FIG. 2;

fig. 6 is a schematic structural view of the second driving mechanism shown in fig. 2.

Description of reference numerals:

10. the pipe shear comprises a pipe shear body, 11, a fixed handle, 111, a pipe support part, 12, a movable handle, 121, an inner buckle, 122, an outer buckle, 13, a blade, 131, a ratchet wheel, 20, a base, 30, a pipe shear clamp, 40, a driving device, 41, a first driving mechanism, 411, a first air cylinder, 412, an accommodating groove, 42, a second driving mechanism, 421, a resisting rod, 422, a second air cylinder, 423, a third air cylinder, 424, a vertical mounting plate, 425, a horizontal mounting plate, 50, a pipe conveying device, 51, a clamping mechanism, 511, a clamping block, 512, a fourth air cylinder, 52, a conveying mechanism, 60, a clamping mechanism, 61, a clamping plate, 62, a fifth air cylinder, 70, a pipe tray, 81, a man-machine interface, 82, a control button, 91, a first photoelectric sensor, 92, a second photoelectric sensor, 93 and a third photoelectric sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "on" another element, it can be directly on the other element or be on the other element with an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Also, as used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In addition, unless otherwise specified, the terms "first" and "second" and the like in the description are used for distinguishing various components, elements, steps and the like in the description, and are not used for representing logical relationships or sequential relationships among the various components, elements, steps and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The embodiment of the invention provides a pipe shear durability testing device, and a tested pipe shear 10 is shown in fig. 1 and comprises a fixed handle 11, a movable handle 12 and a blade 13. One end of the fixed handle 11 is provided with a pipe support part 111 for accommodating a pipe, and the blade 13 is rotatably connected to the fixed handle 11 and is arranged opposite to the pipe support part 111. The movable handle 12 is rotatably connected with the fixed handle 11. The blade 13 is provided with a ratchet wheel 131, and the ratchet wheel 131 is provided with ratchets. An inner buckle 121 and an outer buckle 122 are arranged on the movable handle 12, and both the inner buckle 121 and the outer buckle 122 are meshed with the ratchet wheel 131. The specific using process is as follows: when a pipe needs to be cut, the movable handle 12 is forced to move towards the fixed handle 11, the outer buckle 122 on the movable handle 12 is clamped in a ratchet gap, the blade 13 is pushed to rotate downwards, and the blade 13 is close to the pipe support part 111 so as to clamp the pipe. The movable handle 12 is then automatically reset under the condition of losing stress, the blade 13 is locked by the inner buckle 121 in the resetting process, and the outer buckle 122 is also reset together and then clamped in the gap of the next ratchet. When the movable handle 12 is forced again to move in the direction of the fixed handle 11, the blade 13 further rotates to approach the tube support portion 111, and the tube is further clamped. The movable handle 12 is repeatedly moved for a plurality of times, so that the blade 13 is driven to rotate one by one, and the gap between the blade 13 and the pipe support part 111 is gradually reduced. When the clearance between the blade 13 and the pipe receiving portion 111 is zero, the pipe is sheared. The path S in fig. 1 represents a reciprocating path along which the pipe cutter 10 gradually pinches off the pipe. After the pipe is cut, when the movable handle 12 is automatically reset, the movable handle 12 can be broken away in the direction away from the fixed handle 11, so that the inner buckle 121 and the outer buckle 122 on the movable handle 12 are both separated from the blade 13, the blade 13 loses the function of the buckle and rotates in the direction away from the pipe support part 111 to realize automatic reset, and the pipe cutter 10 is opened to put the pipe into the pipe. Path G in fig. 1 represents the moving path of the pipe shears 10 when it needs to be opened.

Fig. 2 to 4 show an embodiment of the pipe shears durability testing apparatus, which includes a pipe shear clamp 30, a driving device 40, a pipe conveying device 50, and a controller (PLC controller). The pipe shears clamp 30 is used for clamping the fixed handle 11 of the pipe shears 10. The driving device 40 is used for driving the movable handle 12 of the pipe shears 10 to act so as to clamp or open the pipe shears 10. The pipe conveying device 50 is arranged on the feeding side of the pipe shears 10, and the pipe conveying device 50 is used for intermittently conveying pipes (aluminum plastic pipes or plastic pipes and the like) into the pipe shears 10. The driving device 40 and the tube conveying device 50 are electrically connected (wired or wireless) with the controller.

The working principle of the pipe shear durability testing device of the present embodiment is explained as follows: the pipe shears 10 are fixed by the pipe shear clamp 30, and the driving device 40 drives the movable handle 12 to act, so that the pipe shears 10 are opened or closed, and the cutting action is realized. After finishing once cutting, the pipe is automatically conveyed into the pipe shears 10 by the pipe conveying device 50, the driving device 40 drives the movable handle 12 repeatedly to move, further, the cutting action is performed again, and after repeated cutting actions, quality problems of the pipe shears 10 are judged, so that durability test of the pipe shears 10 is realized, manual operation of the pipe shears 10 is not needed, labor intensity is greatly reduced, and test efficiency is effectively improved. The controller is used, so that the actions of all the mechanisms are consistent, and the whole testing process is further automated.

Specifically, referring to fig. 2, the driving device 40 includes a first driving mechanism 41 and a second driving mechanism 42 electrically connected to the controller. The pipe shears clamp 30 and the first driving mechanism 41 are arranged oppositely up and down, and the pipe shears 10 are located between the first driving mechanism 41 and the pipe shears clamp 30. The first driving mechanism 41 pushes the movable handle 12 upward through a plurality of reciprocating motions, so that the pipe shears 10 gradually clamps the pipe, and finally the pipe is cut off by the blade 13. The second driving mechanism 42 is used for driving the movable handle 12 to move in a direction away from the fixed handle 11 when the pipe shears 10 are sheared, so that the pipe shears 10 are opened, and further, the pipe can be forced to enter the pipe shears 10 again, and the next shearing action is completed. The first driving mechanism 41 and the second driving mechanism 42 are independently operated and mutually matched, so that the opening and the clamping of the pipe shears 10 are realized, and the control of the pipe shears 10 is relatively easy. It should be noted that, in other embodiments, a driving mechanism may be used to drive the pipe 10 to open and close, and only the movement path of the driving mechanism needs to be set. If the driving end of the driving mechanism is connected with the movable handle 12, the driving end of the driving mechanism is set to reciprocate to a certain extent to drive the movable handle 12 to reciprocate along the path S, so that the pipe shears 10 clamp the pipe; when it is desired to open, the drive end is moved further downwardly to bring the movable handle 12 to the lowest point along path G until the pipe shears 10 are opened.

More specifically, referring to fig. 5 and 6, the first driving mechanism 41 includes a first cylinder 411 electrically connected to the controller, the first cylinder 411 is disposed right below the movable handle 12, and the first cylinder 411 extends and retracts to and fro for multiple times during the process of cutting the pipe. The second driving mechanism 42 is disposed on the left side or the right side of the pipe shears 10, the second driving mechanism 42 includes a resisting rod 421, a second cylinder 422 and a third cylinder 423, and the second cylinder 422 and the third cylinder 423 are electrically connected to the controller. The second cylinder 422 is used for driving the abutting rod 421 to enter or exit between the fixed handle 11 and the movable handle 12, and the third cylinder 423 is used for driving the abutting rod 421 to move up and down.

The overall operation of the drive device 40 is specifically as follows: when the driving end of the first cylinder 411 moves upwards, the movable handle 12 is jacked up to the highest point of the path S, at this time, the outer buckle 122 is clamped in a ratchet gap to drive the ratchet wheel 131 to rotate, and the blade 13 rotates a certain angle towards the pipe support part 111; when the driving end of the first cylinder 411 moves downward, the movable handle 12 automatically resets to the lowest point of the path S, and the outer clip 122 also automatically resets and enters the next ratchet gap. The first cylinder 411 is repeated many times, the outer buckle 122 drives the ratchet wheel 131 to rotate again, and the blade 13 continues to rotate towards the pipe support part 111 until the pipe is cut off. After the pipe is cut off, when the pipe shears 10 needs to be opened, the second cylinder 422 drives the abutting rod 421 to enter between the movable handle 12 and the fixed handle 11, and then the third cylinder 423 drives the abutting rod 421 to move downwards, so that the movable handle 12 further moves downwards from the lowest point of the path S to the lowest point of the path G, the blade 13 is separated from the constraint of the inner buckle 121 and the outer buckle 122, rotates upwards, and the pipe shears 10 are opened. Then the third cylinder 423 drives the prop 421 to move upward and reset, and the second cylinder 422 drives the prop 421 to exit the pipe shears 10 and reset, so as to prevent the prop 421 from obstructing the reciprocating movement of the movable handle 12 in the next cutting process. The first driving mechanism 41 and the second driving mechanism 42 both complete corresponding actions mainly through the first air cylinder 411, the second air cylinder 422 and the third air cylinder 423, and the use of the air cylinders can ensure that the actions are switched to and fro quickly, the precision is high, and the actions are stable. In other embodiments, a mechanism such as an oil cylinder or a linear motor may be used instead of the first, second, and third cylinders 411, 422, and 423.

Further, the driving end of the first cylinder 411 is concavely provided with an accommodating groove 412 for accommodating the movable handle 12, and when the first cylinder 411 repeatedly pushes the movable handle 12, the movable handle 12 can be limited in the accommodating groove 412, so that the first cylinder 411 can effectively push the movable handle 12, and the action precision is ensured.

Further, as shown in fig. 6, the second driving mechanism 42 further includes a support bracket including a vertical mounting plate 424 and a horizontal mounting plate 425 connected thereto. The second cylinder 422 is in up-and-down sliding fit with the vertical mounting plate 424, and the driving end of the second cylinder 422 is connected with the abutting rod 421. The propping rod 421 may be a rod integrally disposed on the piston rod of the second cylinder 422, or a rod other than the piston rod. The third cylinder 423 is mounted on the horizontal mounting plate 425, and the driving end of the third cylinder 423 drives the second cylinder 422 to slide up and down along the vertical mounting plate 424. The design enables the supporting rod 421 to move horizontally and back and move vertically, and the structural design is reasonable and compact.

In this embodiment, as shown in fig. 4, the tube conveying device 50 specifically includes a clamping mechanism 51 and a transfer mechanism 52 electrically connected to the controller, and the clamping mechanism 51 is disposed on the transfer mechanism 52. The clamping mechanism 51 is used for clamping or releasing a pipe material, and the transfer mechanism 52 is used for driving the clamping mechanism 51 to be close to or far away from the pipe shears 10. The clamping mechanism 51 is used for driving the pipe to advance on one hand, and can be used for clamping the pipe in the pipe cutting process on the other hand, so that the pipe is prevented from moving and failing to cut the pipe. Moreover, the transfer mechanism 52 can drive the clamping mechanism 51 to reciprocate, after finishing a cutting operation, the clamping mechanism 51 releases the pipe, the transfer mechanism 52 drives the clamping mechanism 51 to retreat to the initial position, the clamping mechanism 51 re-clamps the pipe, and then drives the pipe to advance toward the pipe shears 10, so that the pipe enters the pipe shears 10. Repeating the steps, the pipes can enter the pipe shears 10 in sequence.

Specifically, the clamping mechanism 51 includes two clamping blocks 511 disposed oppositely and a fourth cylinder 512 for driving the two clamping blocks 511 to approach or move away from each other, and the fourth cylinder 512 is electrically connected to the controller. Other transmission mechanisms, such as a crank mechanism and the like, are further disposed between the fourth cylinder 512 and the two clamping blocks 511, which are not shown in the figure. The clamping mechanism 51 can be replaced by the existing pneumatic clamping jaws and the like, the improvement of the invention is that the clamping mechanism 51 is applied to the pipe shear durability testing device, and the specific structure of the clamping mechanism 51 is irrelevant to the improvement of the invention, so the specific structure is not shown in detail in the figures and is not described herein.

Specifically, the transfer mechanism 52 includes a motor (servo motor) and a lead screw and nut mechanism connected to the motor, a driving end of the lead screw and nut mechanism is connected to the clamping mechanism 51, and the motor is electrically connected to the controller. The motor and the screw rod and nut mechanism are matched to promote the stable conveying of the pipe. In other embodiments, the transfer mechanism 52 may be a drive mechanism that can reciprocate, such as an air cylinder or an oil cylinder.

Further, the pipe shear durability testing device further comprises a rotatable pipe tray 70, pipes are wound on the pipe tray 70, and the pipe tray 70 is arranged on the feeding side of the pipe conveying device 50. The pipe tray 70 is used for winding and storing pipes, so that the occupied space of the pipes is reduced, and the resistance of pipe conveying can be reduced by the aid of the rotatable pipe tray 70. The pipe pallet 70, the clamping mechanism 51, and the pipe shears 30 are arranged in this order from the rear to the front in the horizontal direction (i.e., in the conveying direction of the pipe). It should be noted that, in other embodiments, the above-mentioned tube tray 70 may be omitted, and the tube may be directly wound and stacked on the ground.

Further, in the present embodiment, please refer to fig. 6, the device for testing durability of pipe shears further includes a straight clamping mechanism 60 electrically connected to the controller, wherein the straight clamping mechanism 60 is disposed between the pipe tray 70 and the pipe conveying device 50. The straightening mechanism 60 is used for straightening a bent pipe, so that the pipe entering the pipe shears 10 is ensured to be a straight pipe, and the pipe shears 10 can be conveniently cut. It should be noted that, in other embodiments, when the pipe tray 70 is not provided, the straight clamping mechanism 60 may also be adopted, and at this time, the straight clamping mechanism 60 may ensure that the pipe may be rolled and stacked on the ground, so as to prevent the pipe with a long length from occupying a large work site. It should be noted that the clamp mechanism 60 releases the pipe before the transfer mechanism 52 feeds the pipe in the direction of the pipe shears 10.

Specifically, the clamping mechanism 60 includes two oppositely disposed clamping plates 61 and a fifth cylinder 62 for driving the two clamping plates 61 to approach or separate from each other, the fifth cylinder 62 is electrically connected to the controller, and the length of the clamping plate 61 is greater than that of the clamping block 511. The clamping mechanism 60 can also adopt the existing pneumatic clamping jaws and other mechanisms, the improvement of the invention is to apply the clamping mechanism 60 to the pipe shears durability testing device, and the specific structure of the clamping mechanism 60 is irrelevant to the improvement of the invention, so the specific structure is not shown in detail in the figures and is not described herein.

The pipe shear durability testing device further comprises a first photoelectric sensor 91, a second photoelectric sensor 92 and a third photoelectric sensor 93, wherein the first photoelectric sensor 91, the second photoelectric sensor 92 and the third photoelectric sensor 93 are electrically connected with the controller. The first photoelectric sensor 91 is used for detecting whether the pipe shears 10 are opened or not, and when the first photoelectric sensor 91 detects that the pipe shears 10 are opened, the controller controls the pipe conveying device 50 to act again. The second photoelectric sensor 92 is used for detecting whether the pipe enters the pipe cutter 10, and when the second photoelectric sensor 92 detects that the pipe enters the pipe cutter 10, the controller controls the first driving mechanism 41 to move, so that the movable handle 12 swings up and down. The third photoelectric sensor 93 is used for detecting whether the pipe to be cut still exists on the pipe tray 70, and when the third photoelectric sensor 93 detects that the pipe to be cut is used up, the controller controls the system to close the test. The first photoelectric sensor 91, the second photoelectric sensor 92 and the third photoelectric sensor 93 are used for providing triggering information before the corresponding mechanism executes actions, and the action execution is guaranteed to be correct. The first photosensor 91, the second photosensor 92, and the third photosensor 93 are mounted at corresponding positions as needed.

In summary, the driving device 40 (including the first cylinder 411, the second cylinder 422, and the third cylinder 423), the tube conveying device 50 (including the fourth cylinder 512 and the motor), the straightening mechanism 60 (including the fifth cylinder 62), the first photoelectric sensor 91, the second photoelectric sensor 92, and the third photoelectric sensor 93 are all electrically connected to the controller (the electrical connection may be a wired connection or a wireless connection). The controller controls the sequential actions of all the mechanisms according to a pre-programmed program, and further realizes automation of the whole testing process.

The execution process of the pipe shear durability testing device is as follows: when the pipe cutter 10 is manually fixed to the pipe cutter holder 30 in advance, the pipe cutter 10 is opened in advance, and the pipe is placed in the two clamp blocks 511 of the pipe conveying device 50. The test is started, the first photoelectric sensor 91 detects whether the pipe cutter 10 is opened, when the first photoelectric sensor 91 detects that the pipe cutter 10 is opened, the controller controls the clamping mechanism 51 to act to clamp the pipe, then the transfer mechanism 52 acts, and the transfer mechanism 52 conveys the clamping mechanism 51 and the pipe positioned in the clamping mechanism 51 into the pipe cutter 10. At this time, the second photoelectric sensor 92 detects whether the pipe enters the pipe cutter 10, when the second photoelectric sensor 92 detects that the pipe has entered the pipe cutter 10, the controller controls the straight clamping mechanism 60 to act, the straight clamping mechanism 60 is used for clamping the next position of the pipe to be cut straight, and meanwhile, the controller controls the first air cylinder 411 to act up and down, so that the movable handle 12 is repeatedly knocked. After the pipe is cut, the controller controls the second cylinder 422 to drive the abutting rod 421 to enter the pipe cutter 10, and then the controller controls the third cylinder 423 to drive the abutting rod 421 to move downwards, so as to open the pipe cutter 10. After the pipe shears 10 is opened, the controller controls the third cylinder 423 and the third cylinder 423 to drive the abutting rod 421 to reset. Then the clamping controller controls the clamping mechanism 51 to loosen the pipe, the transfer mechanism 52 drives the clamping mechanism 51 to move backwards, the clamping mechanism 51 clamps the next position of the pipe again, at the moment, the clamping and straightening mechanism 60 loosens the pipe, and the pipe is driven to move forwards by the transfer mechanism 52. And at this point, after one shearing test cycle is finished, the system repeatedly feeds materials and continues the next shearing test until the test times are finished. During the whole test, when the third photoelectric sensor 93 detects that the pipe to be cut is used up, the controller controls the system to close the test and also to send out alarm information.

In addition, the pipe shears durability testing device further comprises a base 20, and the pipe shears clamp 30, the first driving mechanism 41, the second driving mechanism 42, the clamping mechanism 51, the transfer mechanism 52, the straightening mechanism 60 and the pipe pallet 70 are all arranged on the base 20. The mechanisms are connected and assembled into a simple integrated device through the base 20, and the device is convenient to use and move. The base 20 is further provided with a human-machine interface 81 and a control button 82 electrically connected with the controller. The human-machine interface 81 is used for realizing human-machine interaction. The control buttons 82 are used to effect control of the corresponding operations during the test. In another embodiment, the pipe shears durability testing apparatus may be configured without the base 20, and the pipe shears holder 30, the first driving mechanism 41, the second driving mechanism 42, the clamping mechanism 51, the transfer mechanism 52, the straightening mechanism 60, the pipe pallet 70, and the like may be directly mounted on the floor or other work surface.

The invention also provides a pipe shear durability test method, which adopts the pipe shear durability test device to test and comprises the following steps:

step S10: preparing before testing, fixing the pipe shears 10 on the pipe shear clamp 30, pre-opening the pipe shears 10, and meanwhile, placing the pipe in the pipe conveying device 50;

step S20: starting the test, the pipe conveying device 50 conveys the pipe into the pipe cutter 10;

step S30: the driving device 40 drives the movable handle 12 to enable the pipe cutter 10 to gradually clamp the pipe until the pipe is cut off;

step S40: the driving device 40 drives the movable handle 12 to open the pipe shears 10;

step S50: and repeating the steps S20 to S40 for a plurality of times until the preset test times are reached, and completing the test. According to the method for testing the durability of the pipe shears, the pipe shears 10 are fixed through the pipe shear clamp 30, and the driving device 40 drives the movable handle 12 to act, so that the pipe shears 10 are opened or closed, and the cutting action is realized. After finishing once cutting, the pipe is automatically conveyed into the pipe shears 10 by the pipe conveying device 50, the driving device 40 drives the movable handle 12 repeatedly to move, further, the cutting action is performed again, and after repeated cutting actions, quality problems of the pipe shears 10 are judged, so that durability test of the pipe shears 10 is realized, manual operation of the pipe shears 10 is not needed, labor intensity is greatly reduced, and test efficiency is effectively improved.

Further, step S20 is specifically: in the first cutting, the clamping mechanism 51 clamps the pipe material, and the transfer mechanism 52 drives the clamping mechanism 51 to move forward in the direction of the pipe cutter 10. During subsequent cutting, the clamping mechanism 51 releases the pipe, the transfer mechanism 52 drives the clamping mechanism 51 to retreat to the initial position, the clamping mechanism 51 clamps the next position of the pipe, and the transfer mechanism 52 drives the clamping mechanism 51 to advance.

Step S30 specifically includes: the first driving mechanism 41 repeatedly pushes the movable handle 12 toward the fixed handle 11, so that the blade 13 gradually rotates toward the tube support portion 111, and when the gap between the blade 13 and the tube support portion 111 is zero, the tube is cut.

Step S40 specifically includes: the second driving mechanism 42 drives the movable handle 12 to move away from the fixed handle 11, and the blade 13 rotates away from the tube holder 111, so that the tube shears 10 are opened.

Wherein, in the process of executing step S30 and step S40, step S60 can be executed synchronously, and step S60 is: the straightening mechanism 60 straightens the tubing to allow the straightened tubing to enter the next test. At the next test, before the transfer mechanism 52 drives the clamping mechanism 51 to move towards the pipe cutter 10, the straightening mechanism 60 is released, so that the pipe is driven by the clamping mechanism 51 to advance. It should be noted that the basic principle of the testing method described in this embodiment is the same as that of the testing apparatus described above, and therefore, for a more detailed description of the testing method, reference may be made to the testing apparatus, which is not described herein again.

The method for testing the durability of the pipe shears is described in the following practical example, which specifically includes the following steps:

opening the testing device, returning the clamping mechanism 51 to the initial position, placing the pipe into the clamping mechanism 51, placing the pipe shears 10 to be tested into the pipe shear clamp 30, pre-opening the pipe shears 10, setting the length (such as 30mm) of the pipe to be cut each time, opening the testing switch, clamping the pipe by the clamping mechanism 51, clamping the pipe by the transfer mechanism 52, pushing the pipe to move towards the direction of the shearing pliers (the moving length can be set), after the transfer mechanism 52 stops moving, clamping the pipe by the straightening mechanism 60, moving the first cylinder 411 to reciprocate the movable handle 12, after the pipe is gradually clamped and cut by the blade 13, driving the abutting rod 421 to enter the pipe shears 10 by the second cylinder 422, driving the abutting rod 421 to move downwards by the third cylinder 423 until the pipe shears 10 are loosened, driving the abutting rod 421 to reset by the second cylinder 422 and the third cylinder 423, resetting the pipe by the clamping mechanism 51, loosening the transfer mechanism 52 driving the clamping machine to drive the clamping machine The mechanism 51 is retracted to the starting position to allow the gripping mechanism 51 to grip the pipe again-the straightening mechanism 60 releases the pipe. And at the moment, after one tube shearing test is finished, the system repeatedly feeds materials, continues the next tube shearing test until the test times are finished (the shearing times can be set), and automatically closes the test after the shearing times are tested.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (9)

1. A pipe shear durability testing apparatus, comprising:

the pipe shearing clamp is used for clamping a fixed handle of the pipe shear;

the driving device is used for driving the movable handle of the pipe shears to act so as to clamp or open the pipe shears;

the pipe conveying device is used for conveying pipes into the pipe shears in sequence; and

the driving device and the pipe conveying device are both electrically connected with the controller;

the driving device comprises a first driving mechanism and a second driving mechanism which are electrically connected with each other through the controller, the pipe shearing clamp and the first driving mechanism are oppositely arranged from top to bottom, the pipe shearing is located between the first driving mechanism and the pipe shearing clamp, the first driving mechanism is used for moving towards the direction of the fixed handle to repeatedly push the movable handle to enable the pipe shearing to gradually clamp the pipe, and the second driving mechanism is used for driving the movable handle to move towards the direction away from the fixed handle to enable the pipe shearing to be opened when the pipe is sheared.

2. The pipe shears durability testing device of claim 1, wherein the first driving mechanism comprises a first cylinder electrically connected with the controller, the first cylinder is arranged right below the movable handle, the second driving mechanism is arranged on the left side or the right side of the pipe shears, the second driving mechanism comprises a supporting rod, a second cylinder and a third cylinder, the second cylinder and the third cylinder are electrically connected with the controller, the second cylinder is used for driving the supporting rod to enter or exit between the fixed handle and the movable handle, and the third cylinder is used for driving the supporting rod to move up and down.

3. The pipe shears durability testing device of claim 1, wherein the pipe conveying device comprises a clamping mechanism and a transfer mechanism, the clamping mechanism and the transfer mechanism are electrically connected with the controller, the clamping mechanism is arranged on the transfer mechanism, the clamping mechanism is used for clamping or releasing a pipe, and the transfer mechanism is used for driving the clamping mechanism to be close to or far away from the pipe shears.

4. The pipe shears durability testing device of claim 3, wherein the transfer mechanism comprises a motor electrically connected to the controller and a lead screw-nut mechanism connected to the motor, and a driving end of the lead screw-nut mechanism is connected to the clamping mechanism.

5. The pipe shears durability testing device of claim 1, further comprising a straightening mechanism electrically connected to the controller, wherein the straightening mechanism is disposed at the feeding side of the pipe conveying device, and the straightening mechanism is configured to straighten a bent pipe.

6. The pipe shears durability testing device according to any one of claims 1 to 5, further comprising a rotatable pipe tray, the pipe being wound on the pipe tray, the pipe tray being provided on the feeding side of the pipe conveying device.

7. The pipe shears durability testing device according to claim 6, further comprising a base, wherein the pipe pallet, the pipe conveying device, the pipe shears clamp and the driving device are all arranged on the base, and the pipe pallet, the pipe conveying device and the pipe shears clamp are arranged in sequence; and the base is provided with a human-computer interface and a control button which are electrically connected with the controller.

8. The pipe shears durability test device according to any one of claims 1 to 5, further comprising a first photoelectric sensor for detecting whether the pipe shears are open, wherein the first photoelectric sensor is electrically connected to the controller; the pipe shear is used for cutting a pipe into pieces, and the pipe shear is used for cutting the pipe into pieces; the device comprises a controller, and is characterized by further comprising a third photoelectric sensor, wherein the third photoelectric sensor is used for detecting whether the pipe is used up or not, and is electrically connected with the controller.

9. A method for testing the durability of a pipe shear is characterized by comprising the following steps:

step S10: preparing before testing, namely fixing the pipe shears on a pipe shear clamp, opening the pipe shears in advance, and meanwhile, placing the pipe in a pipe conveying device;

step S20: starting testing, and conveying the pipe into the pipe shear by the pipe conveying device;

step S30: the driving device drives the movable handle to enable the pipe shears to gradually clamp the pipe until the pipe is sheared;

step S40: the driving device drives the movable handle to open the pipe shears;

step S50: repeating the steps S20 to S40 for a plurality of times until the preset test times are reached, and completing the test;

the driving device comprises a first driving mechanism and a second driving mechanism which are electrically connected with the controller;

step S30 specifically includes: the first driving mechanism repeatedly pushes the movable handle towards the direction of the fixed handle, so that the blade gradually rotates towards the direction of the pipe support part, and when the gap between the blade and the pipe support part is zero, the pipe is cut off;

step S40 specifically includes: the second driving mechanism drives the movable handle to move towards the direction far away from the fixed handle, and the blade rotates towards the direction far away from the pipe support part, so that the pipe shears are opened.

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