Automatic feeding mechanism of screw thread rolling machine

Abstract

The present invention discloses an automatic feeding mechanism of a screw thread rolling machine, which relates to the technical field of screw thread rolling. The mechanism includes a feeding module, a transmission plate, and a controller. The feeding module includes a chassis for placing screws and an adsorption assembly for moving screw blanks. The adsorption assembly includes a conveyor belt passing through the chassis and a magnetic module for adsorbing the screw blanks. The chassis is connected to a vibration bucket for vibrating the screw blanks to a vertical direction and transmitting them. The feed end of the vibration bucket is located below the conveyor belt and is used to receive the screw blanks separated from the magnetic module, and the discharge end extends out of the chassis. The vibration bucket is connected to a power assembly for driving the vibration. A pressure sensor is provided on the transmission plate, the pressure sensor is embedded in the transmission plate, and the detection end faces the upper surface of the transmission plate. The pressure sensor, the adsorption assembly, and the power assembly are respectively electrically connected to the controller. The present application has the effect of reducing energy waste and reducing unnecessary mechanical wear.

Description

Technical Field

[0001] The present application relates to the technical field of screw thread rolling, and in particular to an automatic feeding mechanism of a screw thread rolling machine. Background Art

[0002] Thread rolling refers to rolling the semi-finished screws to achieve the required thread. In the thread rolling process, a machine called a screw thread rolling machine is required. The screw thread rolling machine consists of a cutting mechanism and a feeding mechanism. The feeding mechanism feeds the screw blank (hereinafter referred to as the screw) to the cutting mechanism. The cutting mechanism consists of a fixed thread rolling plate and a movable thread rolling plate. The two thread rolling plates cut the screws fed into them to form threads and threads.

[0003] At present, a vibrating feeder is generally used for feeding. When the vibrating feeder feeds, the screws will enter a track and gradually move forward one by one. However, the thread rolling speed is relatively slow, resulting in the vibrating feeder keeping feeding during the thread rolling process. However, before a blank is threaded, it is stagnant in place waiting to enter the thread rolling plate. At this time, the vibrating feeder is still vibrating to feed, resulting in energy waste and unnecessary mechanical wear. Therefore, the present application proposes a new technical solution. Summary of the Invention

[0004] In order to reduce energy waste and unnecessary mechanical wear, the present application provides an automatic feeding mechanism for a screw thread rolling machine.

[0005] The present application provides an automatic feeding mechanism for a screw thread rolling machine, which adopts the following technical solutions:

[0006] An automatic feeding structure for a screw thread rolling machine includes a feeding module, a conveyor plate, and a controller. The feeding module includes a chassis for placing screws and an adsorption assembly for moving screw blanks. The adsorption assembly includes a conveyor belt passing through the chassis and a magnetic module for adsorbing the screw blanks. The chassis is connected to a vibrating hopper for vibrating the screw blanks to a vertical position and conveying them. The feeding end of the vibrating hopper is located below the conveyor belt and is used to receive the screw blanks that have separated from the magnetic module. The discharging end extends out of the chassis. The vibrating hopper is connected to a power assembly for driving it to vibrate.

[0007] The conveying plate is located below the chassis and connected to the discharge end of the vibrating bucket. There are two conveying plates that are parallel to each other. A gap is left between the two conveying plates for the screw thread to penetrate. The head of the screw is mounted on the conveying plate. The conveying plate is tilted.

[0008] A pressure sensor is provided on the transmission plate. The pressure sensor is embedded in the transmission plate with its detection end facing the upper surface of the transmission plate. The pressure sensor, the adsorption component and the power component are electrically connected to the controller respectively.

[0009] Optionally, the pressure sensor is installed on the conveying plate near the vibrating bucket, and the controller is configured as follows:

[0010] Set the interval of pressure sensor feedback data to t, where t is the preset value;

[0011] If the pressure detection value corresponding to the pressure sensor feedback data is 0 or a value within a preset range for n consecutive times, the power component and the adsorption component are activated; wherein n is a preset integer.

[0012] Optionally, the adsorption assembly further includes a bracket, the conveyor belt is mounted above the chassis through the bracket, with one end located above the inner side of the chassis and the other end located outside the chassis, the conveyor belt is divided into two sections, and the lower section of the conveyor belt gradually increases in height after adsorbing the screw blank; the bracket includes a plurality of rollers, and the rollers are concave to form a concave portion for the magnetic module to pass through;

[0013] The magnetic module includes a magnet and an outer protective skin covering the magnet, the outer protective skin is integrally formed with the conveyor belt and the magnet is located inside the outer protective skin; a baffle is installed in the chassis, the baffle is located on the side of the vibrating bucket and a belt passage is opened in the middle of the baffle for the conveyor belt to pass through.

[0014] Optionally, the top and bottom side walls of the belt-pass opening are both arc-shaped, the opening size of the belt-pass opening gradually decreases along the direction of travel of the conveyor belt, and the narrowest section of the belt-pass opening is larger than the widest section of the conveyor belt and the magnetic module.

[0015] Optionally, a pressure plate 1 is installed on the side of several rollers located in the lower half of the conveyor belt, and the pressure plate 1 is located on the side of the roller away from the baffle. The pressure plate 1 is fixed to the side wall of the chassis and extends toward the conveyor belt. The pressure plate 1 is located above the inner belt surface of the conveyor belt.

[0016] Optionally, a second pressing plate is fixed to the side of the baffle facing the vibration bucket, and the second pressing plate is arc-shaped in side view and the higher end is fixed to the side wall of the baffle and connected to the top side wall of the belt through opening.

[0017] Optionally, the power assembly includes a movable rod, a rotating block, a turntable and a motor, one end of the movable rod is connected to the vibrating bucket, and the other end is rotatably connected to the rotating block, the rotating block is rotatably connected to the edge of the turntable, the rotating shaft of the turntable is coaxially fixed with the motor, and a spring is also fixed on the vibrating bucket, and one end of the spring fixes the vibrating bucket, and the other end is connected to the lower surface of the chassis, and there are multiple springs.

[0018] Optionally, an opening is provided at one end of the chassis, the vibration bucket passes through the opening, and one section of the vibration bucket is located above the chassis and the other section is located below the chassis; the chassis is provided with a bellows, one end of the bellows is fixed to the inner bottom surface of the chassis, and the other end is fixed upward to the outer wall of the vibration bucket.

[0019] Optionally, the conveyor belt has a multi-section structure, and each section of the conveyor belt is respectively installed with a magnetic module.

[0020] To sum up, the present application includes the following beneficial technical effects: the adsorption component moves the screws stacked on the chassis to the vibration bucket, the vibration bucket vibrates the screws, and the screws fall when vertical and are placed on the conveyor plate, and are fed to the thread rolling plate of the thread rolling machine through the conveyor plate. The pressure sensor installed on the conveyor plate can feedback the pressure value, so that it can be determined how many screws are on the conveyor plate. If there are too many screws piled up, the feeding speed can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of this application;

[0022] Figure 2 yes Figure 1 A magnified schematic diagram of part A;

[0023] Figure 3 It is a schematic diagram of the control structure of this application;

[0024] Figure 4 It is a schematic diagram of the local structure of this application.

[0025] Explanation of the accompanying reference numerals: 1. Feeding module; 2. Conveyor plate; 3. Power assembly; 4. Controller; 11. Chassis; 12. Adsorption assembly; 121. Conveyor belt; 122. Magnetic module; 123. Bracket; 124. Roller; 125. Pressing plate 1; 13. Vibrating bucket; 14. Baffle; 141. Pressing plate 2; 31. Turntable; 32. Motor 1; 33. Rotating block; 34. Movable rod; 35. Spring. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-4 This application is described in further detail.

[0027] The embodiment of the present application discloses an automatic feeding mechanism of a screw thread rolling machine.

[0028] Reference Figure 1 、 Figure 2 and Figure 3 The automatic feeding mechanism of the screw thread rolling machine includes a feeding module 1, a conveying plate 2 and a controller 4, wherein the feeding module 1 includes a chassis 11 for stacking screw blanks (hereinafter referred to as screws) and an adsorption component 12 for moving the screws;

[0029] The chassis 11 is rectangular when viewed from above, and a vibrating bucket 13 is provided near the end. The vibrating bucket 13 is trapezoidal when viewed from the front, and includes two left and right inclined plates. One end of the two inclined plates is welded and fixed to the same end plate to enclose the bucket structure. The end with a larger width (i.e., the upper end) of the vibrating bucket 13 is the feed end, and the end with a smaller width (i.e., the lower end) is the discharge end. The discharge does not come out from the bottom of the vibrating bucket 13, but from the end that is not enclosed.

[0030] A power component 3 for controlling the vibration of the vibrating bucket 13 is installed at the bottom of the vibrating bucket 13, and the discharge port of the vibrating bucket 13 is connected to the conveying plate 2; wherein, a pressure sensor is embedded in the conveying plate 2, and the detection end of the pressure sensor faces the upper surface of the conveying plate 2, and the pressure sensor, the adsorption component 12 and the power component 3 are respectively electrically connected to the controller 4.

[0031] Through the above structure, the adsorption component 12 adsorbs the screws stacked on the chassis 11 and moves them to the vibrating bucket 13. When the vibrating bucket 13 vibrates, the screws in the bucket can be shaken, so that the threads face downward and pass through the gaps between the transmission plates 2, and are vertically mounted on the transmission plate 2. Since the transmission plate 2 is provided with an inclination, the screws can move downward along the transmission plate 2. A pressure sensor is provided on the transmission plate 2, so that the pressure feedback from the pressure sensor can be used to determine whether the operating frequency of the adsorption component 12 and the power component 3 needs to be adjusted. The number of screws on the transmission plate 2 can be controlled so that the number of screws to be threaded on the transmission plate 2 does not increase or even become full. The work efficiency can be adjusted according to the specific situation, reducing energy consumption and unnecessary mechanical wear.

[0032] The chassis 11 is rectangular in shape when viewed from above, with its edges folded upwards to limit the screws and effectively prevent them from slipping out of the chassis 11. The bottom of the chassis 11 is tilted at a slight angle, perhaps around 5 degrees, to facilitate the screws rolling along the chassis 11. The suction assembly 12 is located above the chassis 11, near the steeper side. The vibrating bucket 13 is located below the suction assembly 12, near the edge of the chassis 11. The vibrating bucket 13 is movably connected to the chassis 11 and has a trapezoidal shape when viewed from the front. An opening is provided on the chassis 11 for the vibration bucket 13 to pass through. The diameter of the opening is larger than the minimum opening diameter of the vibration bucket 13, so that the vibration bucket 13 can pass through the opening and be located below the chassis 11. A bellows is provided on the upper surface of the chassis 11, and the other end of the bellows is adhered to the outer wall of the vibration bucket 13. In this way, the bellows can seal the gap between the vibration bucket 13 and the opening of the chassis 11, effectively preventing the screws from being moved out through the gap or getting stuck in the gap when the vibration bucket 13 vibrates, and at the same time prevent the top opening of the vibration bucket 13 from being completely stuck when vibrating.

[0033] Reference Figure 1 and Figure 4 There are two conveyor plates 2, and the two conveyor plates 2 are arranged in parallel. The gap between the conveyor plates 2 allows the screws to be arranged and slide. Therefore, the width of the gap between the two conveyor plates 2 is greater than the diameter of the screw thread and smaller than the diameter of the screw head, so that the screw can just pass through the gap between the conveyor plates 2 and the screw head is placed on the conveyor plates 2. One end of the conveyor plate 2 is connected to the bottom of the vibrating bucket 13, and the conveyor plate 2 is located below the opening at the bottom of the vibrating bucket 13, so that the opening of the vibrating bucket 13 can be aligned with the opening of the conveyor plate 2. The conveyor plate 2 is arranged downwardly, so that the gap between the conveyor plate 2 and the vibrating bucket 13 gradually increases as the slope increases. The size of the gap is just larger than the height of the screw head, which can be 3-5 mm larger than the height of the screw head. That is, the screw can just slide downward through the gap between the conveyor plate 2 and the vibrating bucket 13, and it can also ensure that the screw will not fall out through the gap between the discharge end and the conveyor plate 2 when the vibrating bucket 13 vibrates.

[0034] The pressure sensor is installed on the conveying plate 2 and is located in the middle of the conveying plate 2 or near the vibrating bucket 13 .

[0035] Controller 4 is configured as:

[0036] Set the interval of the pressure sensor feedback data to t; where t is a preset value, which is determined by the staff according to the specific working conditions and can be 0.1-1s.

[0037] If the pressure detection value corresponding to the pressure sensor feedback data is 0 or a value within the preset range for n consecutive times, the power component 3 and the adsorption component 12 are operated; wherein n is a preset integer, and if it is 0 for n consecutive times, it means that no screw is detected in multiple samplings.

[0038] According to the above setting, when the screws are arranged above the pressure sensor, the pressure sensor feedback data meets the conditions. At this time, the controller 4 can know that there are fewer screws to be threaded currently, and the power component 3 and the adsorption component 12 need to work again to continue to feed out the screws. With this setting, fewer pressure sensors can be installed and it is still possible to detect whether there are too many screws arranged.

[0039] Reference Figure 1 The adsorption component 12 includes a conveyor belt 121, a bracket 123 and a magnetic module 122. The conveyor belt 121 is located above the chassis 11, and one end of the conveyor belt 121 is located above the inner side of the chassis 11, and the other end is located outside the chassis 11; the conveyor belt 121 is erected through the bracket 123, and the bracket 123 is composed of multiple individual support frames and rollers 124, and the heights of the support frames and rollers 124 gradually increase along the transmission direction of the conveyor belt 121.

[0040] The conveyor belt 121 is divided into two sections, the lower section of the conveyor belt 121, wherein the height of the lower section of the conveyor belt 121 gradually increases after the screws are adsorbed. Therefore, the above-mentioned rollers 124 are divided into at least two groups, the upper and lower groups, in the chassis 11. The conveyor belt 121 passes around all the rollers 124 at the same time, and the lower group of rollers 124 presses down the conveyor belt 121, causing it to first approach the inner bottom of the chassis 11 and then gradually rise.

[0041] A second motor (not shown) is coaxially mounted on one of the rollers 124 at the end of the conveyor belt 121 to provide power for its rotation. The second motor, which may be a reduction motor, is electrically connected to the controller 4. Arranging the conveyor belt 121 from low to high facilitates the gradual attraction of screws, allowing them to be drawn upwards without being obstructed by other unattracted screws on the chassis 11.

[0042] The magnetic module 122 includes a magnet and an outer protective skin covering the magnet. The outer protective skin is integrally formed with the conveyor belt, and the magnet is embedded in the conveyor belt 121 and located within the outer protective skin. The magnet is relatively small and is only sufficient to absorb one screw, thereby effectively preventing the magnetic module 122 from absorbing a large number of screws and reaching the vibrating bucket 13, causing the screws to obstruct each other and thus preventing smooth feeding. The magnet can be a soft magnet. When the magnetic module 122 rotates to the end, it can reduce wear caused by squeezing or bending. The middle section of the roller shaft 124 is recessed inward, and the recess is larger than the volume of the magnetic module 122. When the magnetic module 122 moves to the roller shaft 124, it can reduce friction and collision, thereby reducing wear on the magnetic module 122.

[0043] A pressure plate 125 is mounted to the side of the roller 124. This plate 125 is fixed to the side wall of the chassis 11 and extends toward the conveyor belt 121. It is located above the lower inner surface of the conveyor belt 121. The pressure plate 125 is curved in side view, with its end curled upward. This allows the pressure plate 125 to press upward-curving screws downward during suction. Furthermore, the curled end prevents the screws from detaching and falling above the pressure plate 125, effectively preventing them from being caught in the roller 124 and obstructing the normal operation of the conveyor belt 121.

[0044] Reference Figure 1 A baffle 14 is installed within the chassis 11. This baffle 14 is located to the side of the vibrating hopper 13, facing the conveying direction of the conveyor belt 121. A belt passage opening is defined in the center of the baffle 14 for the conveyor belt 121 to pass through. The opening is sized just larger than the conveyor belt 121 and the magnetic module 122, but smaller than the height of the screws and the width of the screw heads. As a result, when the conveyor belt 121, carrying the magnetic module 122, moves above the vibrating hopper 13, the belt 121 and magnetic module 122 pass through the opening, while the screws separate from the magnetic module 122 and fall into the vibrating hopper 13 for the next round of conveying.

[0045] The top and bottom sidewalls of the belt-passing opening are both curved, and the opening size decreases along the conveyor belt 121's direction of travel. This arrangement facilitates the conveyor belt 121 and the magnetic module 122 to pass through the opening, while also allowing for the screws to be separated. The section of the conveyor belt 121 where the magnetic module 122 is embedded is elliptical when viewed from the side. The narrowest section of the belt-passing opening is larger than the widest sections of the magnetic module 122 and the conveyor belt 121. The rounded corners reduce wear and tear caused by accidental collisions between the conveyor belt 121 and the conveyor belt 121 as it passes through the opening, while also facilitating smoother passage of the conveyor belt 121 through the opening.

[0046] Reference Figure 1 The baffle 14 is connected to a second pressure plate 141 on the side facing the vibrating bucket 13. The second pressure plate 141 is arranged in an arc shape, and the end of the second pressure plate 141 with a larger height is fixed to the baffle 14 and connected to the top side wall of the belt-passing opening. When the conveyor belt 121 moves to the side of the belt-passing opening with the screws, the second pressure plate 141 can gradually press the conveyor belt 121 downward, thereby ensuring that the conveyor belt 121 is not too high, so that it can pass through the belt-passing opening smoothly and reduce the possibility of the screw drilling into the belt-passing opening and hindering the conveyor belt 121 from passing through.

[0047] Reference Figure 2 The power assembly 3 includes a turntable 31, a motor 32, a rotating block 33, and a movable rod 34. The turntable 31 is located on the side of the vibrating bucket 13. It is circular when viewed from the front, and a rotating shaft is passed through the middle part of the turntable 31. The motor 32 is fixed to a mounting base extending outward from the vibrating bucket 13, and the output end of the motor 32 is coaxially fixed with the rotating shaft. When the motor 32 rotates, it can drive the turntable 31 to rotate. The rotating block 33 is connected between the movable rod 34 and the turntable 31, and the two ends of the rotating block 33 are hinged to the movable rod 34 and the turntable 31. The end of the rotating block 33 is hinged to the edge of the turntable 31, forming an eccentric structure. When the turntable 31 rotates, it can drag the rotating block 33 to move and displace. The rotating block 33 is long and has arcs at both ends. This treatment makes it easier for the rotating block 33 to rotate, effectively avoiding bumps and obstructions during rotation. One end of the movable rod 34 is hinged to the rotating block 33, and the other end is fixed to the vibrating bucket 13. When the rotating block 33 moves, since one end of the movable rod 34 is fixed and the other end is hinged, the rotating block 33 can drag the movable rod 34 up and down to achieve the purpose of vibration.

[0048] A plurality of springs 35 are also fixed to the mounting base extending from the vibrating bucket 13. One end of the spring 35 is fixed to the vibrating bucket 13, and the other end is fixed to the mounting base of the motor 1 32. The mounting base is connected to the lower surface of the chassis 11. When the vibrating bucket 13 vibrates, the springs 35 provide support and cushioning, reducing the chance of it impacting the chassis 11 and causing deformation.

[0049] In another embodiment of the present application:

[0050] The conveyor belt 121 can be a multi-section structure, and a magnetic module 122 is embedded in each section of the conveyor belt 121. Making the conveyor belt 121 into a multi-section structure can reduce bending and wear caused by compression with the rotating shaft when the conveyor belt 121 rotates to the end.

[0051] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An automatic feeding mechanism for a screw thread rolling machine, characterized by: The invention comprises a feeding module (1), a conveying plate (2) and a controller, wherein the feeding module (1) comprises a chassis (11) for placing screws and an adsorption component (12) for moving screw blanks, the adsorption component (12) comprises a conveyor belt (121) passing through the chassis (11) and a magnetic module (122) for adsorbing the screw blanks, the chassis (11) is connected to a vibration bucket (13) for vibrating the screw blanks to a vertical direction and conveying them, the feeding end of the vibration bucket (13) is located below the conveyor belt (121) and is used to receive the screw blanks separated from the magnetic module (122), and the discharging end extends out of the chassis (11); the vibration bucket (13) is connected to a power component (3) for driving the vibration thereof; The conveying plate (2) is located below the chassis (11) and is connected to the discharge end of the vibrating bucket (13). There are two conveying plates (2) and they are distributed in parallel. A gap is left between the two conveying plates (2) for the screw thread to penetrate. The head of the screw is mounted on the conveying plate (2). The conveying plate (2) is tilted. The conveying plate (2) is provided with a pressure sensor, which is embedded in the conveying plate and has a detection end facing the upper surface of the conveying plate (2). The pressure sensor, the adsorption component (12) and the power component (3) are electrically connected to a controller respectively; the pressure sensor is installed at a position of the conveying plate (2) close to the vibration bucket (13), and the controller is configured as follows: Set the interval of pressure sensor feedback data to t, where t is the preset value; If the pressure detection value corresponding to the pressure sensor feedback data is 0 or a value within a preset range for n consecutive times, the power component (3) and the adsorption component (12) are operated; wherein n is a preset integer; the adsorption component (12) further includes a bracket (123), the transmission belt (121) is mounted above the chassis (11) through the bracket (123), and one end is located above the inner side of the chassis (11), and the other end is located outside the chassis (11), the transmission belt (121) is divided into two sections, and the height of the lower section of the transmission belt (121) gradually increases after adsorbing the screw blank; the bracket (123) includes a plurality of rollers (124), and the rollers (124) are concave to form a concave portion for the magnetic module (122) to pass through; The magnetic module (122) includes a magnet and an outer protective skin covering the magnet, the outer protective skin and the conveyor belt (121) are integrally formed, and the magnet is located inside the outer protective skin; a baffle (14) is installed in the chassis (11), the baffle (14) is located on the side of the vibration bucket (13), and a belt passage is opened in the middle of the baffle (14) for the conveyor belt (121) to pass through.

2. The automatic feeding mechanism of the screw thread rolling machine according to claim 1, characterized in that: The top and bottom side walls of the belt-pass opening are both arranged in an arc shape, the opening size of the belt-pass opening gradually decreases along the traveling direction of the conveyor belt (121), and the narrowest section of the belt-pass opening is larger than the widest sections of the conveyor belt (121) and the magnetic module (122).

3. The automatic feeding mechanism of the screw thread rolling machine according to claim 2, characterized in that: A pressure plate (125) is installed on the side of a plurality of rollers located in the lower half of the conveyor belt (121). The pressure plate (125) is located on the side of the roller away from the baffle (14). The pressure plate (125) is fixed to the side wall of the chassis (11) and extends toward the conveyor belt (121). The pressure plate (125) is located above the inner belt surface of the conveyor belt (121).

4. The automatic feeding mechanism of the screw thread rolling machine according to claim 3, characterized in that: A second pressing plate (141) is fixed to the side of the baffle (14) facing the vibrating bucket (13), and the second pressing plate (141) is arc-shaped in side view and its higher end is fixed to the side wall of the baffle (14) and connected to the top side wall of the belt through-hole.

5. The automatic feeding mechanism of the screw thread rolling machine according to claim 1, characterized in that: The power assembly (3) includes a movable rod (34), a rotating block (33), a turntable (31) and a motor (32). One end of the movable rod (34) is connected to the vibrating bucket (13), and the other end is rotatably connected to the rotating block (33). The rotating block (33) is rotatably connected to the edge of the turntable (31). The rotating shaft of the turntable (31) is coaxially fixed with the motor (32). A spring (35) is also fixed on the vibrating bucket (13), and one end of the spring (35) fixes the vibrating bucket, and the other end is connected to the lower surface of the chassis (11). There are multiple springs (35).

6. The automatic feeding mechanism of the screw thread rolling machine according to claim 1, characterized in that: An opening is formed at one end of the chassis (11), and the vibrating bucket (13) passes through the opening, with one section of the vibrating bucket (13) located above the chassis (11) and the other section located below the chassis (11); a bellows is sleeved on the chassis (11), with one end of the bellows being fixed to the inner bottom surface of the chassis (11) and the other end being fixed upward to the outer wall of the vibrating bucket (13).

7. The automatic feeding mechanism of the screw thread rolling machine according to claim 1, characterized in that: The conveyor belt (121) is a multi-section structure, and each section of the conveyor belt (121) is respectively installed with a magnetic module (122).

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