A fully automatic pneumatic CNC thread rolling process for prefabricated beam plants

Abstract

The invention belongs to the technical field of steel bar processing technology, and specifically relates to a fully automatic pneumatic CNC thread rolling process in a prefabricated beam factory; the invention comprises a machine platform, a processing component, a clamping component and a moving component, the clamping component and the moving component are both arranged on the machine platform, the processing component is connected to the moving component and is slidably arranged on the machine platform, the clamping component comprises two first cylinders, an electromagnetic valve and a conversion cylinder, the moving component comprises a pushing cylinder, the conversion cylinder comprises a conversion cylinder body and a conversion piston, the first cylinder, the electromagnetic valve and the pushing cylinder are all connected to the conversion cylinder, the electromagnetic valve outputs high-pressure gas to both ends of the conversion cylinder respectively, which is used to drive the conversion piston to switch the connecting air path, the two air paths switched and connected by the conversion piston are respectively used to drive the clamping component to clamp the steel bar before processing, and then drive the processing component to process, and after the processing is completed, the pushing cylinder drives the processing component to withdraw and then the clamping component releases the steel bar; the invention can ensure the stability of steel bar clamping and reduce the use cost.

Description

Technical Field

[0001] The invention belongs to the technical field of steel bar processing technology, and specifically relates to a full-automatic pneumatic numerically controlled thread rolling process in a prefabricated beam factory. Background Art

[0002] When producing precast beams, precast beam factories need to tie the steel bars in the mold before pouring. When the length of the precast beam exceeds the length of a single steel bar, the steel bars need to be connected to each other to extend the length. Steel bars are generally connected in three ways, including mechanical connection, welding and binding connection. Mechanical connection is to connect two steel bars through a steel bar sleeve, and it is necessary to perform steel bar thread rolling process at the butt end of the two steel bars to form threads, and then connect the two steel bars to the sleeves respectively.

[0003] When steel bars are threaded, they are generally processed through a steel bar threading machine, such as a construction steel bar thread rolling machine with authorization announcement number CN115090799A, a construction steel bar thread rolling machine, including a base, a bench vise, a first linear motion device, a rib stripping thread rolling head, a second linear motion device and a third linear motion device, grooves are provided on the mutually adjacent sides of the two fixed ends of the bench vise, the moving path of the output end of the first linear motion device is parallel to the moving path of the output end of the second linear motion device, the output end of the rib stripping thread rolling head is arranged in a direction close to the second linear motion device, the bench vise can be slidably arranged in the output end of the second linear motion device, the third linear motion device is fixedly arranged in the output end of the second linear motion device, the third linear motion device is located below the bench vise, and the moving path of the output end of the third motion device is parallel to the height direction of the base.

[0004] The steel bar threading machine of the prior art needs to manually clamp the steel bar on the processing machine tool, and then manually push the processing assembly to process the steel bar into threads. It is difficult to ensure the stability of clamping by manually clamping the steel bar. Although there is an electric drive clamping method, there are many sizes of steel bars used in prefabricated beam construction. The time required to clamp steel bars of different sizes until they are completely stable is different. Adding sensors will lead to an increase in the cost of use. Based on this, a fully automatic pneumatic CNC thread rolling process for a prefabricated beam factory is proposed. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a fully automatic pneumatic CNC thread rolling process for a prefabricated beam factory.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] The present invention discloses a fully automatic pneumatic CNC thread rolling process for a prefabricated beam factory, comprising a machine, a processing component, a clamping component and a moving component, wherein the clamping component and the moving component are both arranged on the machine, the processing component is connected to the moving component and is slidably arranged on the machine, the clamping component comprises two first cylinders, a solenoid valve and a conversion cylinder, the moving component comprises a pushing cylinder, the conversion cylinder comprises a conversion cylinder body and a conversion piston, the two first cylinders, the solenoid valve and the pushing cylinder are all connected to the conversion cylinder, the solenoid valve outputs high-pressure gas to both ends of the conversion cylinder respectively, for driving the conversion piston to switch the connected air paths, the two air paths switched and connected by the conversion piston are respectively used to first drive the clamping component to clamp the steel bars before processing and then extend the pushing cylinder to drive the processing component for processing, and after processing is completed, first retract the pushing cylinder to drive the processing component to withdraw and then make the clamping component release the steel bars.

[0008] Further, the conversion cylinder body is provided with a propulsion port and a retraction port respectively at two ends of the radial surface of the conversion piston, the two ends of the axial surface of the conversion piston are respectively provided with a first air inlet, a first air outlet, a second air inlet and a second air outlet, the solenoid valve includes a first output port and a second output port, and the axial surface of the conversion piston is provided with an annular groove for connecting the first air inlet and the first air outlet or the second air inlet and the second air outlet;

[0009] The first output port is connected with one end of the two first cylinders, the first air inlet and the propulsion port, the first air outlet is connected with one end of the pushing cylinder, the second output port is connected with the retraction port, the second air outlet and the other end of the pushing cylinder, and the second air outlet is connected with the other end of the two first cylinders; the two first cylinders are connected with clamps, the first output port outputs high-pressure gas for the two first cylinders to move and push the conversion piston to connect the first air inlet and the first air outlet, after the two first cylinders drive the clamps to clamp the steel bars, the pushing cylinder extends to drive the processing assembly to move and perform thread rolling processing on the steel bars; the second output port outputs high-pressure gas for pushing the cylinder to retract and drive the processing assembly to move to end the processing, and pushes the conversion piston to connect the second air inlet and the second air outlet, so that the two first cylinders drive the clamps to loosen the steel bars.

[0010] Furthermore, the diameter of the first cylinder is smaller than the diameter of the conversion cylinder, and the diameter of the push cylinder is smaller than the diameter of the conversion cylinder.

[0011] Furthermore, two telescopic grooves are arranged on the conversion cylinder body, springs and balls are arranged in the two telescopic grooves, and the two balls are respectively used to abut against two ends of the conversion piston.

[0012] Furthermore, the clamping assembly also includes a bracket and a clamping plate, the bracket is surrounded by a plurality of vertical walls, the clamping plate is slidably fitted in the bracket, a pressure sensor is provided on the vertical wall, and the pressure sensor is electrically connected to the solenoid valve.

[0013] Furthermore, the processing assembly includes a transmission motor, a servo motor and a chuck, the chuck is transmission connected to the transmission motor, a threaded disk is coaxially rotated inside the chuck, a plurality of centripetal grooves are provided on the inner wall of the chuck, processing heads are slidably provided in the plurality of grooves, the other end of the processing head abuts against the thread on the threaded disk, the rim surface of the threaded disk is provided with teeth, the output shaft of the servo motor is meshed with the threaded disk, and the plurality of processing heads approach or move away from each other as the threaded disk rotates.

[0014] Furthermore, a distance sensor is provided on the clamping plate, the distance sensor is electrically connected to the servo motor, and the distance sensor is used to detect the size of the steel bars clamped by the clamping plate.

[0015] Furthermore, a flat-head cutter is vertically arranged at the center of the threaded disk.

[0016] Furthermore, the blade of the flat-head knife forms an obtuse angle along the vertical direction away from the center of the circle, and the flat-head knife is used to flatten the surface and chamfer the steel bar head.

[0017] Furthermore, the obtuse angle of the flat-head knife is 135°-170°.

[0018] The beneficial effects of the present invention are as follows: by clamping the steel bars to a set pressure before processing and then driving the push cylinder to move, and by completely resetting the push cylinder after processing is completed and then releasing the steel bars, the present invention can be applied to steel bars of different sizes without the need for adjustment before use, while ensuring that the clamping force of the steel bars is the same each time, thereby ensuring safety during the processing, reducing manual operation steps, and optimizing the processing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a side structural schematic diagram of the present invention;

[0022] Figure 3 It is a schematic diagram of the internal top structure of the chuck of the present invention;

[0023] Figure 4 It is a schematic diagram of the internal bottom structure of the chuck of the present invention;

[0024] Figure 5 A schematic diagram of an air path in which the first air inlet and the first air outlet are connected to each other in the present invention;

[0025] Figure 6 A schematic diagram of an air path in which the second air inlet and the second air outlet are connected to each other in the present invention;

[0026] Figure 7 for Figure 5 A local enlarged schematic diagram of point A in the middle.

[0027] Legend: 1. Machine; 2. Transmission motor; 3. Processing component; 31. Chuck; 32. Threaded disk; 33. Processing head; 34. Flat-head cutter; 35. Gear; 36. Servo motor; 4. Clamp; 5. Vertical wall; 6. First cylinder; 7. Solenoid valve; 8. Conversion cylinder; 81. Push port; 82. Retract port; 83. First air inlet; 84. First air outlet; 85. Second air inlet; 86. Second air outlet; 87. Ball; 9. Push cylinder. DETAILED DESCRIPTION

[0028] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0029] like Figure 1-7 As shown, a fully automatic pneumatic CNC thread rolling process for a prefabricated beam factory of the present invention comprises a machine 1, a processing component 3, a clamping component and a moving component, the clamping component and the moving component are both arranged on the machine 1, the processing component 3 is connected to the moving component and is slidably arranged on the machine 1, the clamping component comprises two first cylinders 6, a solenoid valve 7 and a conversion cylinder 8, the moving component comprises a pushing cylinder 9, the conversion cylinder 8 comprises a conversion cylinder body and a conversion piston, the two first cylinders 6, the solenoid valve 7 and the pushing cylinder 9 are all connected to the conversion cylinder 8, the solenoid valve 7 outputs high-pressure gas to both ends of the conversion cylinder 8 respectively, for driving the conversion piston to switch the connected air paths, the two air paths switched by the conversion piston are respectively used to first drive the clamping component to clamp the steel bar before processing and then extend the pushing cylinder 9 to drive the processing component 3 to process, after the processing is completed, first retract the pushing cylinder 9 to drive the processing component 3 to withdraw and then make the clamping component release the steel bar;

[0030] Since the existing steel bar threading machine needs to manually clamp the steel bar on the processing machine tool, and then manually push the processing component 3 to process the steel bar thread, it is difficult to ensure the stability of the clamping by manually clamping the steel bar. Although there is an electric drive clamping method, there are many sizes of steel bars used for prefabricated beam construction. The time required for clamping steel bars of different sizes to be completely stable is different, and adding sensors will lead to an increase in the cost of use;

[0031] Therefore, by changing the structure of the thread rolling machine and thus changing its processing steps, when processing the thread on the end of the steel bar, first place the steel bar between the two cylinders, connect the solenoid valve 7 to the high-pressure gas source, and then start the solenoid valve 7 to fill the outer ends of the two first cylinders 6 with gas and push them to the middle to clamp the steel bar. When the air pressure filled in the two first cylinders 6 reaches the set requirement and continues to be pressurized, the high-pressure gas will flow into the conversion cylinder 8 at this time, and push the conversion piston to one side and connect to the pushing cylinder 9, so that the pushing cylinder 9 pushes the processing component 3 to one side of the steel bar until the processing is completed. After the steel bar thread rolling processing is completed, the solenoid valve 7 switches the connected air path to allow the high-pressure gas to fill the other side of the pushing cylinder 9. The pushing cylinder 9 drives the processing assembly 3 away from the steel bar until the processing assembly 3 returns to the initial position. Continuing to pressurize will cause the high-pressure gas to be filled into the other side of the conversion cylinder 8, and the conversion piston in the conversion cylinder 8 will move to the other side. After moving into place, it will be connected to the other side of the two first cylinders 6, so that the two first cylinders 6 are moved away from each other and the steel bar is loosened. By clamping to a set pressure before processing and then driving the pushing cylinder 9 to move, and after the processing is completed, the pushing cylinder 9 is completely reset and then the steel bar is loosened. It can be suitable for steel bars of different sizes without the need for adjustment before use. At the same time, it ensures that the clamping force of the steel bar is the same each time, which also ensures the safety of the processing process, reduces manual operation steps, and optimizes the processing technology.

[0032] Specifically, the conversion cylinder body is provided with a propulsion port 81 and a retraction port 82 at both ends of the radial surface of the conversion piston, and the first air inlet 83, the first air outlet 84, the second air inlet 85 and the second air outlet 86 are respectively provided at both ends of the axial surface of the conversion piston. The solenoid valve 7 includes a first output port and a second output port. An annular groove is provided on the axial surface of the conversion piston for connecting the first air inlet 83 and the first air outlet 84 or the second air inlet 85 and the second air outlet 86.

[0033] The first output port is connected to the outer side surfaces of the two first cylinders 6 in the figure, the first air inlet 83 and the propulsion port 81, the first air outlet 84 is connected to the right side of the pushing cylinder 9 in the figure, the second output port is connected to the retraction port 82, the second air outlet 86 and the left side of the pushing cylinder 9 in the figure, and the second air outlet 86 is connected to the inner sides of the two first cylinders 6 in the figure; the two first cylinders 6 are connected with a clamping plate 4, the first output port outputs high-pressure gas for the two first cylinders 6 to move and push the conversion piston to connect the first air inlet 83 and the first air outlet 84, after the two first cylinders 6 drive the clamping plate 4 to clamp the steel bars, the pushing cylinder 9 extends out to drive the processing assembly 3 to move and perform thread rolling processing on the steel bars; the second output port outputs high-pressure gas for pushing the cylinder 9 to retract and drive the processing assembly 3 to move to end the processing, and pushes the conversion piston to connect the second air inlet 85 and the second air outlet 86, so that the two first cylinders 6 drive the clamping plate 4 to relax the steel bars.

[0034] In order to enable multiple cylinders to move in sequence when the solenoid valve 7 outputs high-pressure gas, in one embodiment, the diameter of the first cylinder 6 is smaller than the diameter of the conversion cylinder 8, and the diameter of the pushing cylinder 9 is smaller than the diameter of the conversion cylinder 8; the cross-sectional area of ​​the cavity inside the conversion cylinder 8 is larger than the cross-sectional areas of the first cylinder 6 and the pushing cylinder 9. Therefore, when subjected to the same air pressure, the cylinder with a smaller cross-sectional area is pushed first, and the cylinder with a larger cross-sectional area is pushed later through the order of different cross-sectional area adjustment activities.

[0035] Since the sequence of cylinder activities is controlled by different cross-sectional areas of different cylinders in the above embodiment, it may happen that when the initial pressure difference between two different cylinders is not large, the conversion piston in the conversion cylinder 8 may be pushed before the first cylinder 6 and the pushing cylinder 9 are fully in place. In order to prevent this problem, in one embodiment, two telescopic grooves are provided on the conversion cylinder body, and springs and balls 87 are provided in the two telescopic grooves. The two balls 87 are used to abut against the two ends of the conversion piston respectively.

[0036] By arranging two balls 87 on the inner cavity wall of the conversion cylinder body, when the conversion piston is in the initial position on both sides, the balls 87 abut against its radial surface. Only after the first cylinder 6 or the pushing cylinder 9 moves to the set position and continues to apply pressure until the blocking force of the balls 87 on the conversion piston is reached and exceeded, the conversion piston moves to ensure that the first cylinder 6 and the pushing cylinder 9 can move to the set position to ensure safety during processing.

[0037] In order to improve the automation of the equipment and further reduce manual operations, in one embodiment, the clamping assembly further includes a bracket and a clamping plate 4, the bracket is surrounded by a plurality of vertical walls 5, the clamping plate 4 is slidably fitted in the bracket, and a pressure sensor is provided on the vertical wall 5, and the pressure sensor is electrically connected to the solenoid valve 7;

[0038] By arranging a pressure sensor at the top of the vertical wall 5, the top of the vertical wall 5 is used to position the steel bars in the vertical direction. Therefore, when the steel bars are placed on the top of the vertical wall 5, the pressure sensor will receive the pressure change and instruct the first output port of the solenoid valve 7 to output high-pressure gas. After the steel bars are processed and taken away, the pressure sensor does not receive the pressure, and then instructs the second output port of the solenoid valve 7 to output high-pressure gas, thereby improving the degree of automation of the equipment, reducing manual operations, and improving the safety and convenience of use.

[0039] When processing the steel bar, the processing assembly 3 includes a transmission motor 2, a servo motor 36 and a chuck 31. The chuck 31 is transmission-connected to the transmission motor 2. A threaded disk 32 is coaxially arranged inside the chuck 31. A plurality of centripetal slide grooves are arranged on the inner wall of the chuck 31. Processing heads 33 are slidingly arranged in the plurality of slide grooves. The other end of the processing head 33 abuts against the thread on the threaded disk 32. The rim surface of the threaded disk 32 is provided with teeth. The output shaft of the servo motor 36 is meshed with the threaded disk 32. The servo motor 36 is electrically connected to the pressure sensor. The plurality of processing heads 33 move closer to or farther away from each other as the threaded disk 32 rotates.

[0040] The transmission motor 2 drives the chuck 31 to rotate. A radial surface on the threaded disk 32 close to the side of the steel bar is provided with a thread that surrounds from the inside to the outside. One end of the three processing heads 33 is slidably set in the three slide grooves of the inner wall, and the other end is abutted in the groove of the thread. When the pressure sensor senses the pressure change, it instructs the servo motor 36 to rotate, and when the servo motor 36 rotates, the threaded disk 32 rotates accordingly. Three gears 35 are engaged on the side of the threaded disk 32 for support and keeping it in the center position. The three gears 35 are rotatably connected to the inner wall of the chuck 31, and the servo motor 36 is engaged with one of the gears 35. When the threaded disk 32 rotates, the thread will cause the three processing heads 33 to move inward or outward synchronously for clamping or loosening the steel bar, and a thread groove is provided on the processing head 33 for processing the thread of the steel bar during rotation.

[0041] Furthermore, a distance sensor is provided on the clamping plate 4, and the distance sensor is electrically connected to the servo motor 36. The distance sensor is used to detect the size of the steel bars clamped by the clamping plate 4. When the two first cylinders 6 have clamped the steel bars and stopped stably, the distance sensor will transmit the distance data between the two clamping plates 4 and instruct the servo motor 36 to rotate to the corresponding angle, so that the space between the three processing heads 33 can correspond to the processing of steel bars of this size.

[0042] Since the ends of the steel bars may be uneven before and after processing, and the uneven ends of the steel bars will cause insufficient number of meshing circles between the two steel bars and the same sleeve after being connected, in order to prevent this problem from occurring, the ends of the steel bars need to be simultaneously polished and smoothed during the processing. Therefore, in one embodiment, a flat-headed cutter 34 is vertically arranged at the center of the threaded disk 32. After the pushing cylinder 9 pushes the processing assembly 3 to move toward one side of the steel bar, the steel bar is gradually moved toward the inside of the chuck 31 until it abuts against the threaded disk 32. At this time, the flat-headed cutter 34 in the center of the threaded disk 32 will rotate and polish the end of the steel bar as the chuck 31 rotates, so that the end of the steel bar is smooth.

[0043] At the same time, since the steel bar needs to be screwed into the sleeve after processing, the edges of the general steel bar threads are relatively rough or have steel wire adhered during processing, which can easily cause the connection between the steel bar and the sleeve to be stuck. Therefore, in one embodiment, the blade of the flat-head knife 34 forms an obtuse angle along the vertical direction away from the center of the circle. The flat-head knife 34 is used to flatten the plane and chamfer the steel bar head. By chamfering the end of the steel bar while flattening it, it is convenient for it to be connected to the sleeve.

[0044] Specifically, the obtuse angle of the flat-head knife 34 is 135°-170°.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A fully automatic pneumatic CNC thread rolling process for a prefabricated beam plant, characterized in that: It comprises a machine platform, a processing component, a clamping component and a moving component, the clamping component and the moving component are both arranged on the machine platform, the processing component is connected to the moving component and is slidably arranged on the machine platform, the clamping component comprises two first cylinders, a solenoid valve and a conversion cylinder, the moving component comprises a pushing cylinder, the conversion cylinder comprises a conversion cylinder body and a conversion piston, the two first cylinders, the solenoid valve and the pushing cylinder are all connected to the conversion cylinder, the solenoid valve outputs high-pressure gas to both ends of the conversion cylinder respectively, which is used to drive the conversion piston to switch the connected air path, the two connected air paths switched by the conversion piston are respectively used to drive the clamping component to clamp the steel bar before processing and then extend the pushing cylinder to drive the processing component to process, after processing is completed, first retract the pushing cylinder to drive the processing component to withdraw and then make the clamping component release the steel bar; The conversion cylinder body is provided with a propulsion port and a retraction port respectively at two ends of the radial surface of the conversion piston, and the two ends of the axial surface of the conversion piston are respectively provided with a first air inlet, a first air outlet, a second air inlet and a second air outlet, the solenoid valve includes a first output port and a second output port, and the axial surface of the conversion piston is provided with an annular groove for connecting the first air inlet and the first air outlet or the second air inlet and the second air outlet; The first output port is connected with one end of the two first cylinders, the first air inlet and the propulsion port, the first air outlet is connected with one end of the push cylinder, the second output port is connected with the retraction port, the second air outlet and the other end of the push cylinder, and the second air outlet is connected with the other end of the two first cylinders; clamps are connected to the two first cylinders, the first output port outputs high-pressure gas for the two first cylinders to move and push the conversion piston to connect the first air inlet and the first air outlet, after the two first cylinders drive the clamps to clamp the steel bars, the push cylinder extends to drive the processing assembly to move and perform thread rolling on the steel bars; the second output port outputs high-pressure gas for pushing the cylinder to retract and drive the processing assembly to move to end the processing, and pushes the conversion piston to connect the second air inlet and the second air outlet, so that the two first cylinders drive the clamps to release the steel bars; The diameter of the first cylinder is smaller than the diameter of the conversion cylinder, and the diameter of the push cylinder is smaller than the diameter of the conversion cylinder; The conversion cylinder body is provided with two telescopic grooves, and springs and balls are arranged in the two telescopic grooves. The two balls are respectively used to abut against the two ends of the conversion piston.

2. The fully automatic pneumatic CNC thread rolling process for a prefabricated beam factory according to claim 1, characterized in that: The clamping assembly further comprises a bracket and a clamping plate. The bracket is surrounded by a plurality of vertical walls. The clamping plate is slidably fitted in the bracket. A pressure sensor is arranged on the vertical wall. The pressure sensor is electrically connected to the solenoid valve.

3. The fully automatic pneumatic CNC thread rolling process for a prefabricated beam factory according to claim 2 is characterized in that: The processing assembly includes a transmission motor, a servo motor and a chuck, the chuck is transmission-connected to the transmission motor, a threaded disk is coaxially rotatably arranged inside the chuck, a plurality of centripetal grooves are arranged on the inner wall of the chuck, processing heads are slidably arranged in the plurality of grooves, the other end of the processing head abuts against the thread on the threaded disk, the rim surface of the threaded disk is provided with teeth, the output shaft of the servo motor is meshed with the threaded disk, the servo motor is electrically connected to the pressure sensor, and the plurality of processing heads approach or move away from each other as the threaded disk rotates.

4. The fully automatic pneumatic CNC thread rolling process for a prefabricated beam factory according to claim 3 is characterized by: The clamping plate is provided with a distance sensor, the distance sensor is electrically connected to the servo motor, and the distance sensor is used to detect the size of the steel bars clamped by the clamping plate.

5. The fully automatic pneumatic CNC thread rolling process for a prefabricated beam factory according to claim 3 is characterized by: A flat-headed knife is vertically arranged at the center of the threaded disk; the blade of the flat-headed knife forms an obtuse angle along the vertical direction thereof away from the center of the circle, and the flat-headed knife is used for leveling the plane and chamfering of the steel bar head.

6. The fully automatic pneumatic CNC thread rolling process for a prefabricated beam factory according to claim 5, characterized in that: The obtuse angle of the flat-head knife is 135°-170°.

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