A thread rolling device for bolt processing

Abstract

This invention relates to the field of bolt processing equipment technology, specifically disclosing a thread rolling device for bolt processing, including a transmission base, a fixed thread rolling plate, and a movable thread rolling plate. The transmission base has two closed-loop conveying components aligned front to back. Several strip plates are evenly connected between the outer surfaces of the two closed-loop conveying components. Each strip plate has an elongated hole perpendicular to the conveying direction of the closed-loop conveying components. The fixed thread rolling plate is located on the rear side wall of the transmission base, and a receiving slot is fixed to the rear side of the transmission base. The movable thread rolling plate is movably disposed in the receiving slot, and a driving device is installed on the receiving slot. This invention allows for feeding from a location far from the thread rolling mechanism, eliminating safety hazards. Furthermore, during the thread rolling process, the bolt is constrained by the elongated holes on the strip plates, preventing it from instantly jumping out and colliding with the equipment when extruded between the fixed and movable thread rolling plates, thus improving the product yield.

Description

Technical Field

[0001] This invention relates to the field of bolt processing equipment technology, and specifically discloses a thread rolling device for bolt processing. Background Technology

[0002] Bolts are a very common type of metal fastener. They are made from metal rods through a series of steps, including cutting to a fixed length, end upsetting, surface shot blasting, and thread rolling. The thread rolling process is accomplished using a thread rolling machine. Currently, bolt thread rolling machines on the market require manual placement of the bolt blank between two thread rolling plates. A power unit then moves one thread rolling plate relative to the other to complete the thread rolling process on the surface of the bolt blank.

[0003] For example, invention patent application number 2019107418618 discloses a thread rolling device for processing hardware rods, including an operating table, a track plate, thread rolling plates, inserts, sliders, a positioning mounting plate, a turbine shaft, a cam, a worm gear, a positioning sleeve, and an L-shaped mounting plate. A track plate is welded to the left arm of the operating table, and a trapezoidal groove is formed on this track plate, in which the slider slides. A worm gear is rotatably mounted on the right front side of the operating table, and this worm gear meshes with the front end of the turbine shaft. A positioning sleeve is welded to the right side of the worm gear, through which the right end of the turbine shaft passes, and a tightening bolt is threaded through the top of the positioning sleeve. Although the thread rolling device disclosed in this invention patent can be used for thread rolling processing on the surface of bolts, it requires manual placement of the bolt blank between two thread rolling plates, posing a certain safety hazard during the entire feeding process. Furthermore, after thread rolling, the squeezing and pushing action of the thread rolling plates causes the bolt to jump out instantaneously from between the two plates and impact the machine tool. This not only generates noise during the unloading process due to the impact, but also carries a certain probability of damaging the threads on the bolt, increasing the product defect rate. Based on this, this application proposes a thread rolling device for bolt processing that can effectively solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a thread rolling device for bolt processing, so as to solve the above-mentioned shortcomings of existing thread rolling equipment when used for bolt thread rolling.

[0005] This invention is achieved through the following technical solution:

[0006] A thread rolling device for bolt processing includes a transmission base, a fixed thread rolling plate, and a movable thread rolling plate. The transmission base has two closed-loop conveying components aligned front to back. Several strip plates are evenly connected between the outer surfaces of the two closed-loop conveying components. Each strip plate has an elongated hole perpendicular to the conveying direction of the closed-loop conveying components. The fixed thread rolling plate is disposed on the rear side wall of the transmission base. A storage slot is fixed to the rear side of the transmission base. The movable thread rolling plate is movably disposed in the storage slot. The storage slot is provided with a driving device to enable the movable thread rolling plate to move back and forth relative to the fixed thread rolling plate.

[0007] The thread rolling device for bolt processing provided by this invention only requires the operator or other feeding equipment to fasten the bolt into the elongated hole of each strip plate during thread rolling. Before thread rolling, the bolt is positioned at the end of the elongated hole near the receiving slot. When the bolt moves to the fixed thread rolling plate via the closed-loop conveyor, the drive device is activated to move the movable thread rolling plate back and forth relative to the fixed plate. During this movement, the bolt is clamped between the fixed and movable thread rolling plates, and the thread rolling is completed under the action of the threads on both plates. After thread rolling, the bolt moves to the other end of the elongated hole and is then conveyed out of the processing station by the closed-loop conveyor. Throughout the process, the operator does not come into contact with the thread rolling mechanism, ensuring good safety. Furthermore, due to the limiting operation of the elongated hole, the bolt pushed out from between the fixed and movable thread rolling plates will not suddenly jump out and cause an impact.

[0008] As a specific configuration of the above scheme, the closed-loop conveyor is either a chain or a belt, and the transmission base is provided with transmission wheels connected to the left and right ends of the closed-loop conveyor. One set of the transmission wheels is connected to a power unit through a wheel axle.

[0009] As a specific feature of the above solution, the driving device includes a telescopic pusher fixed on the storage slot, and the movable end of the telescopic pusher is connected to the outer end face of the moving thread rolling plate.

[0010] As a further feature of the above solution, the storage rack is provided with a guide rail, and the moving thread rolling plate is provided with a groove that matches the guide rail.

[0011] As a further feature of the above solution, the upper end of the transmission base is also fixedly provided with a baffle strip that restricts the bolts to the end of the elongated hole near the side of the receiving slot.

[0012] As a further feature of the above scheme, a guide plate is provided in the transmission base located below the fixed thread rolling plate and the moving thread rolling plate, and a debris collection groove is provided in the transmission base located directly below the guide plate.

[0013] As a further feature of the above solution, a horizontal slide rail is provided on the rear side wall of the transmission base, the fixed thread rolling plate is slidably mounted on the horizontal slide rail, and a telescopic adjustment component for adjusting the distance between the fixed thread rolling plate and the moving thread rolling plate is also provided on the rear side wall of the transmission base.

[0014] As a further feature of the above solution, a long slot shrinking component for adjusting the width of the long slot can be detachably installed on the strip plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] I. The thread rolling device for bolt processing disclosed in this invention utilizes a closed-loop conveyor and strip plate structure design, allowing operators to feed materials from a location far from the thread rolling mechanism, eliminating safety hazards. Furthermore, during the thread rolling process, the bolt is restricted by the elongated holes on the strip plate, allowing it to move only from one end of the elongated holes to the other. When the bolt is squeezed out between the fixed and moving thread rolling plates, it will not jump out instantly and collide with the equipment, avoiding the noise caused by collisions in existing bolt thread rolling processes. At the same time, it will not cause damage to the processed threads due to bolt collisions, thus improving the product yield.

[0017] Second, the present invention also improves the design of the thread rolling device for bolt processing. The distance between the fixed thread rolling plate and the moving thread rolling plate is adjusted by the telescopic adjustment component, so that the whole device can be used for thread rolling of bolts of different thicknesses. In addition, the detachable and installable elongated hole shrinking component can change the width of the elongated hole on the strip plate accordingly, so that it can be used for guiding the processing of bolts of different thicknesses, making the whole thread rolling device more versatile. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a frontal three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a rear-view stereoscopic structural diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the transmission base in Embodiment 1 of the present invention;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the closed-loop conveyor and strip plate in this invention;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the storage slot frame, moving thread rolling plate, etc. in this invention;

[0024] Figure 6 This is a schematic diagram of the internal three-dimensional structure of the transmission base in Embodiment 2 of the present invention;

[0025] Figure 7 This is a three-dimensional exploded view of the strip plate, the elongated hole shrinkage component, and the connecting screw in Embodiment 2 of the present invention. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-7 This application will be described in detail with reference to the embodiments.

[0028] Example 1

[0029] Example 1 discloses a thread rolling device for bolt processing, see attached figure. Figure 1 Appendix Figure 2 and attached Figure 4 The main body of the thread rolling device includes a transmission base 1, with a wheel axle 2 rotatably connected to both ends of the transmission base 1. A power unit 3 connected to one of the wheel axles 2 is provided on the outer side of the transmission base 1, so that the wheel axle 2 rotates intermittently at a fixed angle under the action of the power unit 3. A transmission wheel 4 is provided at both the front and rear ends of each wheel axle 2, and a closed-loop transmission component 5 is provided between the two corresponding transmission wheels 3 on the left and right sides. In the specific design process, the closed-loop transmission component 5 can be either a chain or a belt.

[0030] Multiple strip plates 6 are uniformly fixed between the outer surfaces of the two closed-loop conveying components 5 and are arranged perpendicular to the conveying direction. An elongated hole 601 perpendicular to the conveying direction is opened on the strip plate 6. The width of the elongated hole 601 is slightly larger than the diameter of the bolt 100 and smaller than the diameter of the bolt end. This allows the operator to simply fasten the bolt 100 to one end of the elongated hole 601 when manually loading the material.

[0031] Reference Appendix Figure 2 Appendix Figure 3and attached Figure 5 A fixed thread rolling plate 7 is fixedly installed on the rear side wall of the transmission base 1. The fixed thread rolling plate 7 is arranged perpendicular to the conveying direction of the closed-loop conveyor 5, and a certain gap is reserved between the other end of the fixed thread rolling plate 7 and the front side wall of the transmission base 1, so that the bolt after thread rolling can move to the other end of the elongated hole 601 and then pass through the reserved gap. A guide hole is opened on the rear side wall of the transmission base 1, and a movable thread rolling plate 8 that can move back and forth is set in the guide hole. The thread pitch between the movable thread rolling plate 8 and the fixed thread rolling plate 7 is equal to the diameter of the bolt 100. A storage slot 9 is fixed on the rear side of the transmission base 1 at the guide hole, and a telescopic pusher 10 is provided at the outer end of the storage slot 9, and the movable end of the telescopic pusher 10 is connected to the outer end face of the movable thread rolling plate 8. In the specific design process, the telescopic pusher 10 can be either a hydraulic cylinder or a pneumatic cylinder. At the same time, a guide rail 901 is provided on the storage slot 9, and a groove matching the guide rail 901 is opened on the moving thread rolling plate 8.

[0032] In addition, in order to facilitate the collection of debris generated during the thread rolling process, a guide plate 11 is fixed directly below the fixed thread rolling plate 7 and the moving thread rolling plate 8, and a debris collection groove 12 is pulled out and installed on the transmission base 1 directly below the guide plate 11, so that all the debris generated during the process will enter the debris collection groove 12 under the action of the guide plate 11.

[0033] Finally, to ensure that the bolt 100 remains at the end of the elongated hole 601 near the receiving slot 9 after loading and before processing, a baffle strip 13 is fixed to the upper end of the conveyor base 1. The lower end of the baffle strip 13 is in a non-contact state with the strip plate 6. The baffle strip 13 restricts the bolt 100 before processing to the end of the elongated hole 601 near the receiving slot 9. To facilitate automatic unloading of the bolt after thread rolling, the right end of the conveyor base 1 is also open, allowing the processed bolt to fall under its own weight as it flips at the right end opening along with the closed-loop conveyor 5.

[0034] Example 2

[0035] Example 2 discloses an improved thread rolling device for bolt processing based on Example 1. It mainly addresses the limitation of Example 1, which is not applicable to thread rolling of bolts of various diameters. The similarities between Example 2 and Example 1 will not be repeated here; the differences are detailed in the appendix. Figure 6 and attached Figure 7 .

[0036] In this embodiment 2, a horizontal slide rail 14 is fixedly installed on the rear side wall of the transmission base 1, and the fixed thread rolling plate 7 is slidably installed on the horizontal slide rail 14. At the same time, a telescopic adjustment component 15 is also fixedly installed on the rear side wall of the transmission base 1. The telescopic adjustment component 15, like the telescopic push component 10, is preferably selected from either a hydraulic cylinder or a pneumatic cylinder. When thread rolling is performed on bolts of different models, the thread spacing between the moving thread rolling plate 8 and the fixed thread rolling plate 7 is adjusted by controlling the extension or shortening of the telescopic adjustment component 15.

[0037] Meanwhile, a long hole shrinking part 16 corresponding to the bolt type is inserted into the long hole 601, and then it is fixed to the strip plate 6 by the connecting screws 17 around the long hole shrinking part 16, thereby achieving the effect of adjusting the width of the long hole 601 so that it can be used for thread rolling of finer bolts.

[0038] When the thread rolling device disclosed in this embodiment 2 performs thread rolling processing on bolts, it first adjusts the thread spacing between the moving thread rolling plate 8 and the fixed thread rolling plate 7 according to the bolt model to be processed. At the same time, it also installs the corresponding model of elongated hole shrinking component 16 on the elongated hole 601 of each strip plate 6. After the preparation work is completed, the machine can be started and operated.

[0039] During equipment operation, operators or corresponding robots attach bolts 100 one by one to the elongated holes 601 of the strip plate 6, ensuring that the bolts 100 are close to the end of the elongated holes 601 on the side of the receiving slot 9. Then, under the action of the closed-loop conveyor 5, the bolts 100 are moved to contact the threaded surface of the fixed thread rolling plate 7, and the transmission process of the closed-loop conveyor 5 is stopped. Next, the telescopic pusher 10 is activated, causing the movable thread rolling plate 8 to move forward. At this time, the part of the bolt 100 to be processed is between the threads of the fixed thread rolling plate 7 and the movable thread rolling plate 8. Under the action of the movable thread rolling plate 8, the bolt 100 moves forward along the direction of the elongated holes 601 while also rotating. During its rotation, thread grooves are machined on its outer circumference through the threads on both sides.

[0040] When the telescopic pusher 10 pushes the bolt 100 to the other end of the elongated hole 601, it indicates that the processing is complete. Then, the telescopic pusher 10 immediately retracts and resets, and pulls the moving thread rolling plate 8 into the storage slot 9. Subsequently, the closed-loop conveyor 5 is started. After the thread rolling is completed, the bolt 100 will move with the closed-loop conveyor 5 to the right end of the transmission base 1, and then fall down under its own gravity.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A thread rolling device for bolt processing, comprising a transmission base, a fixed thread rolling plate, and a movable thread rolling plate, characterized in that, The transmission base is provided with two closed-loop transmission components that are aligned front to back. Several strip plates are evenly connected between the outer surfaces of the two closed-loop transmission components. Each strip plate has an elongated hole that is perpendicular to the transmission direction of the closed-loop transmission component. The fixed thread rolling plate is provided on the rear side wall of the transmission base. A storage slot is fixed on the rear side of the transmission base. The movable thread rolling plate is movably disposed in the storage slot. The storage slot is provided with a drive device that enables the movable thread rolling plate to move back and forth relative to the fixed thread rolling plate. The upper end of the transmission base is also fixedly provided with a baffle strip that restricts the bolts to the end of the long hole on the side near the receiving slot.

2. The thread rolling device for bolt processing according to claim 1, characterized in that, The closed-loop conveyor is either a chain or a belt. The transmission base is provided with transmission wheels that are connected to the left and right ends of the closed-loop conveyor. One set of the transmission wheels is connected to a power unit through a wheel axle.

3. The thread rolling device for bolt processing according to claim 1, characterized in that, The driving device includes a telescopic pusher fixed on the storage slot, and the movable end of the telescopic pusher is connected to the outer end face of the moving thread rolling plate.

4. The thread rolling device for bolt processing according to claim 3, characterized in that, The storage rack is equipped with a guide rail, and the moving thread rolling plate is provided with a groove that matches the guide rail.

5. The thread rolling device for bolt processing according to claim 1, characterized in that, A guide plate is provided in the conveyor base located below the fixed and moving thread rolling plates, and a debris collection groove is provided in the conveyor base located directly below the guide plate.

6. The thread rolling device for bolt processing according to any one of claims 1-5, characterized in that, A horizontal slide rail is provided on the rear side wall of the transmission base, and the fixed thread rolling plate is slidably mounted on the horizontal slide rail. A telescopic adjustment component for adjusting the distance between the fixed thread rolling plate and the moving thread rolling plate is also provided on the rear side wall of the transmission base.

7. The thread rolling device for bolt processing according to claim 6, characterized in that, The strip plate is detachably equipped with a long hole shrinking component that adjusts the width of the long hole.

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