Bolt thread rolling mechanism

Abstract

The utility model relates to the technical field of bolt thread rolling, and provides a bolt thread rolling mechanism which comprises a rack and a pair of rolling wheels, the rolling wheels are both arranged on the rack, a movement control assembly is arranged between the rolling wheels and the rack, a slag discharging assembly is arranged on the surface of the rack, and the slag discharging assembly is arranged on the surface of the rack. The clamping assembly is arranged on the rack and comprises a pair of bottom frames, the bottom frames are fixed to the two ends of the surface of the rack, round pipes are fixed to the bottom frames, telescopic rods are movably connected into the round pipes in a sleeved mode, springs are arranged at the bottoms in the round pipes, and connecting blocks are arranged at the upper ends of the telescopic rods. By means of the technical scheme, the technical problems that in the related technology / the prior art, friction force between a supporting rod and a workpiece is large, in continuous rolling operation, burrs are extremely likely to appear on thread tooth crests due to the too high friction force, the surface quality and precision of bolt threads are seriously affected, and the product yield is reduced are solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of bolt thread rolling technology, and more specifically, to a bolt thread rolling mechanism. Background Technology

[0002] In the bolt manufacturing industry, thread rolling machines play a crucial role. Currently common thread rolling machines are equipped with a pair of rolling rollers with identical parameters, mounted on the two main shafts of the machine and rotating synchronously in the same direction under the drive of a transmission mechanism. The first rolling roller is driven by a hydraulic cylinder to achieve radial feed motion, while the second rolling roller, through precise adjustment, ensures that its indentation on the workpiece surface precisely coincides with that of the first rolling roller, thus rolling threads onto the workpiece surface. During operation, the bolt blank to be processed is placed parallel between the two rolling rollers. By adjusting the workpiece clamps, the axial movement of the workpiece can be flexibly controlled. Throughout the cold rolling process, the workpiece remains in a free rolling state with the two rolling rollers, completing the cold forming of the threads.

[0003] However, in the actual process of rolling external threads, downward displacement is inevitable due to the complexity of the workpiece's stress. To solve this problem, the existing solution adds a support rod below the workpiece. This support rod is arranged parallel to the workpiece, and its surface is made of wear-resistant alloy material to limit and support the workpiece, ensuring the stability of the rolling process. However, this solution has obvious drawbacks: on the one hand, the friction between the support rod and the workpiece is relatively large. In continuous rolling operations, excessive friction can easily cause burrs to appear on the thread tips, seriously affecting the surface quality and precision of the bolt threads and reducing the product yield; on the other hand, the large friction accelerates the wear of the support rod, resulting in a significant reduction in its service life. Frequent replacement of the support rod not only increases production costs but also affects production efficiency. There is an urgent need to optimize and improve the existing technology to enhance the overall performance and processing quality of the bolt thread rolling mechanism. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a bolt thread rolling mechanism, which solves the technical problem in related technologies / prior technologies that the friction between the support rod and the workpiece is too large. In continuous rolling operations, excessive friction can easily cause burrs to appear on the thread tooth tip, which seriously affects the surface quality and accuracy of the bolt thread and reduces the product yield.

[0005] According to one aspect, at least one embodiment of the present disclosure provides a bolt thread rolling mechanism, comprising:

[0006] A test stand and a pair of rolling mills, the rolling mills being mounted on the test stand;

[0007] A motion control assembly is disposed between the rolling mill and the table;

[0008] A slag discharge assembly is disposed on the surface of the platform;

[0009] A clamping assembly, the clamping assembly being disposed on the platform;

[0010] The clamping assembly includes a pair of base frames, which are fixed at both ends of the platform surface. A circular tube is fixed on the base frame, and a retractable rod is movably connected inside the circular tube. A spring is provided at the bottom of the circular tube, and a connecting block is provided at the upper end of the retractable rod.

[0011] As a further technical solution, a pair of lower support rods are rotatably connected between the connecting blocks, a rectangular groove is opened on the surface of the frame, a drive screw is rotatably connected in the rectangular groove, and a slider is slidably connected in the rectangular groove.

[0012] As a further technical solution, the slider and the drive screw are connected by a threaded connection, a telescopic cylinder is installed on the upper end face of the slider, the output end of the telescopic cylinder is connected to a top frame, and a pair of upper support rods are rotatably connected inside the top frame.

[0013] As a further technical solution, the motion control component includes a pair of slide rails, both of which are disposed at both ends of the platform surface. The rolling wheel is slidably connected to the slide rails, and the platform surface is provided with an elongated groove.

[0014] As a further technical solution, a second lead screw is rotatably connected inside the long groove. The second lead screw is controlled to rotate by a motor, and the bottoms of a pair of rolling wheels are respectively connected to the two ends of the second lead screw by threaded connection.

[0015] As a further technical solution, the slag discharge assembly includes a discharge port, which is opened on the surface of the platform. A shield is provided on the surface of the platform, and the shield is located around the periphery of the discharge port.

[0016] As a further technical solution, a bottom cover is provided at the bottom of the platform, and spray pipes are connected to both sides of the rolling mill. A pair of spray pipes are connected to each other, and the water outlet of the spray pipe faces the inside of the rolling mill.

[0017] As a further technical solution, the positions of the pair of upper support rods and the pair of lower support rods correspond to each other.

[0018] As a further technical solution, the bottom cover has a single-sided opening structure and the bottom surface of the bottom cover has an inclined structure.

[0019] The beneficial effects of the embodiments disclosed herein are as follows:

[0020] 1. This disclosure improves the quality of bolt threads: Through a special design of the clamping assembly, utilizing the cooperation of a round tube, a contraction rod, and a spring, the lower support rod can flexibly adapt to changes in the position of the bolt blank. Compared to traditional fixed support rods, this significantly reduces the friction between the lower support rod and the workpiece. In continuous rolling operations, this effectively avoids the problem of burrs appearing on the thread tips due to excessive friction, significantly improving the surface quality and precision of the bolt threads and increasing the product yield.

[0021] 2. This disclosure extends the service life of components: By reducing the friction between the support rod and the workpiece, wear on the support rod is reduced, significantly extending the service life of related components in the clamping assembly. This reduces the need for frequent component replacements, lowers production costs, improves production efficiency, and ensures production continuity.

[0022] 3. In this disclosure, the machining process is precisely controlled: the slide rail and the second lead screw in the movement control component work together to precisely control the movement position and speed of the rolling rollers, ensuring the accuracy and stability of the thread rolling process. Operators can flexibly adjust the position of the rolling rollers according to bolt blanks of different specifications to meet diverse processing needs.

[0023] 4. In this disclosure, efficient slag discharge and cooling are achieved: the slag discharge assembly is rationally designed, and the spray pipes effectively wash away waste slag while cooling the rolling mill and bolt blanks. The coordination of the discharge port, shield, and bottom cover allows the waste slag to be smoothly discharged and collected, keeping the equipment clean and preventing the waste slag from adversely affecting the processing and equipment, thus helping to improve the overall performance and service life of the equipment. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0025] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0026] Figure 2 This is an isometric drawing of the present disclosure;

[0027] Figure 3 This is a cross-sectional view of the present disclosure;

[0028] Figure 4 Appendix to this disclosure Figure 3 Enlarged view of part A in the middle;

[0029] In the diagram: 1. Platform; 2. Roller wheel; 3. Clamping assembly; 3-1. Base frame; 3-2. Round tube; 3-3. Retracting rod; 3-4. Spring; 3-5. Connecting block; 3-6. Lower support rod; 3-7. Rectangular groove; 3-8. Drive screw; 3-9. Slider; 3-10. Telescopic cylinder; 3-11. Top frame; 3-12. Upper support rod; 4. Movement control assembly; 4-1. Slide rail; 4-2. Long groove; 4-3. Second screw; 5. Slag discharge assembly; 5-1. Discharge outlet; 5-2. Shielding cover; 5-3. Bottom cover; 5-4. Spray pipe. Detailed Implementation

[0030] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0031] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0032] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0033] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0035] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] like Figures 1-4 As shown, a bolt thread rolling mechanism according to an embodiment of the present disclosure is illustrated, comprising:

[0037] A frame 1 and a pair of rolling rollers 2, wherein the rolling rollers 2 are both mounted on the frame 1;

[0038] A movement control component 4 is disposed between the rolling mill 2 and the frame 1;

[0039] Slag discharge assembly 5, wherein the slag discharge assembly 5 is disposed on the surface of the platform 1;

[0040] Clamping assembly 3, which is disposed on the platform 1;

[0041] The clamping assembly 3 includes a pair of base frames 3-1, which are fixed at both ends of the surface of the platform 1. A round tube 3-2 is fixed on the base frame 3-1. A retractable rod 3-3 is movably connected inside the round tube 3-2. A spring 3-4 is provided at the bottom of the round tube 3-2. A connecting block 3-5 is provided at the upper end of the retractable rod 3-3. A pair of lower support rods 3-6 are rotatably connected between the connecting blocks 3-5. A rectangular groove 3-7 is opened on the surface of the platform 1. A drive screw 3-8 is rotatably connected inside the rectangular groove 3-7. A slider 3-9 is slidably connected inside the rectangular groove 3-7. The slider 3-9 is connected to the drive screw 3-8 by a threaded connection. A telescopic cylinder 3-10 is installed on the upper end of the slider 3-9. A top frame 3-11 is connected to the output end of the telescopic cylinder 3-10. A pair of upper support rods 3-12 are rotatably connected inside the top frame 3-11.

[0042] In some examples, a clamping assembly 3 is designed to effectively clamp and fix the workpiece. Base frames 3-1 are fixed at both ends of the surface of the frame 1. A circular tube 3-2 is fixed to each base frame 3-1. A retractable rod 3-3 is movably connected inside the circular tube 3-2. A spring 3-4 is installed at the bottom of the circular tube 3-2, providing elastic support and cushioning for the retractable rod 3-3. A connecting block 3-5 is installed at the upper end of the retractable rod 3-3. A pair of lower support rods 3-6 are rotatably connected between the two connecting blocks 3-5. The lower support rods 3-6 can rotate within a certain range to adapt to different working requirements. Simultaneously, a rectangular groove 3-7 is formed on the surface of the frame 1. A drive screw 3-8 is rotatably connected within the rectangular groove 3-7, and the drive screw 3-8 can rotate around its own axis. A slider 3-9 is slidably connected within the rectangular groove 3-7, and the slider 3-9 is connected to the drive screw 3-8 via a threaded connection. When the drive screw 3-8 rotates, it drives the slider 3-9 to slide within the rectangular groove 3-7 via threaded transmission. A telescopic cylinder 3-10 is installed on the upper end face of the slider 3-9, enabling telescopic movement. Its output end is connected to a top frame 3-11, and a pair of upper support rods 3-12 are rotatably connected within the top frame 3-11. The upper support rods 3-12 can also rotate within the top frame 3-11. In actual operation, the slider 3-9 is moved to a suitable position by controlling the drive screw 3-8, and the height of the top frame 3-11 is adjusted by the telescopic cylinder 3-10, so that the upper support rods 3-12 cooperate with the lower support rods 3-6 to clamp the workpiece in the middle. The spring 3-4 at the lower support rod 3-6 provides a certain elastic buffer to avoid damage to the workpiece due to excessive clamping force. Furthermore, both the upper and lower support rods 3-6 can rotate, adapting to workpieces of different shapes and sizes, thus improving the versatility and practicality of the clamping assembly 3.

[0043] like Figures 1-4 As shown in the figure, the motion control component 4 in this embodiment includes a pair of slide rails 4-1, both of which are disposed at both ends of the surface of the frame 1. The rollers 2 are slidably connected to the slide rails 4-1. The surface of the frame 1 is provided with a long groove 4-2, and a second lead screw 4-3 is rotatably connected in the long groove 4-2. The second lead screw 4-3 is controlled to rotate by a motor. The bottoms of the pair of rollers 2 are respectively connected to both ends of the second lead screw 4-3 by threaded engagement.

[0044] In some examples, to achieve precise control of the movement of the rolling roller 2, a movement control component 4 is designed. A pair of slide rails 4-1 are provided at both ends of the surface of the frame 1. The rolling roller 2 is slidably connected to the pair of slide rails 4-1. The slide rails 4-1 provide guidance for the movement of the rolling roller 2, ensuring that the rolling roller 2 can move smoothly along a specific path. The surface of the frame 1 is also provided with a long groove 4-2. A second lead screw 4-3 is rotatably connected in the long groove 4-2. The second lead screw 4-3 can rotate around its own axis in the long groove 4-2. The rotation of the second lead screw 4-3 is controlled by a motor. The motor can provide power for the rotation of the second lead screw 4-3 and can precisely control the rotation speed and direction of the second lead screw 4-3 according to actual needs. The bottoms of the pair of rolling rollers 2 are respectively connected to the two ends of the second lead screw 4-3 by threaded engagement. When the motor drives the second lead screw 4-3 to rotate, due to the threaded engagement between the bottom of the roller 2 and the second lead screw 4-3, the roller 2 will move along the slide rail 4-1 under the drive of the second lead screw 4-3. Moreover, by controlling the rotation direction of the second lead screw 4-3, the two rollers 2 can be moved closer or further apart, thereby meeting different processing requirements and realizing flexible adjustment and precise control of the position of the rollers 2.

[0045] like Figures 1-4 As shown in the figure, the slag discharge assembly 5 in this embodiment includes a discharge port 5-1, which is opened on the surface of the platform 1. A shield 5-2 is provided on the surface of the platform 1, and the shield 5-2 is located around the discharge port 5-1. A bottom cover 5-3 is provided at the bottom of the platform 1. Spray pipes 5-4 are connected to both sides of the roller 2. A pair of spray pipes 5-4 are connected to each other, and the water outlet of the spray pipes 5-4 faces the inside of the roller 2.

[0046] In some examples, to achieve efficient slag removal, a slag removal component 5 is designed. A discharge port 5-1 is opened on the surface of the frame 1. This discharge port 5-1 is the key channel for slag removal, used to discharge waste slag generated during processing. A shield 5-2 is installed on the surface of the frame 1, and the shield 5-2 is located around the discharge port 5-1. The function of the shield 5-2 is to prevent waste slag from splashing out of the discharge port 5-1 during discharge, avoiding waste splattering on other areas of the frame 1 surface, thus ensuring a clean working environment. A bottom cover 5-3 is installed at the bottom of the frame 1. The bottom cover 5-3 can collect the waste slag discharged from the discharge port 5-1, centrally collecting the waste slag for convenient subsequent cleaning and processing. On both sides of the rolling mill 2... Each component is connected to a spray pipe 5-4, and the two spray pipes 5-4 are interconnected. The water blowing end of the spray pipe 5-4 faces the inside of the rolling mill 2. During the processing, the spray pipe 5-4 can spray water into the inside of the rolling mill 2. The spraying water has two main functions: firstly, it can cool the rolling mill 2 and prevent the high temperature generated by the rolling mill 2 during long-term operation from affecting its performance and service life; secondly, the spraying water can wash off the waste residue attached to the rolling mill 2 and the workpiece, allowing it to pass smoothly through the discharge port 5-1 into the bottom cover 5-3, thereby achieving effective discharge of waste residue. Through this design of the waste residue discharge component 5, the timely cleaning of waste residue during the processing can be ensured, improving the working efficiency and processing quality of the equipment.

[0047] For example, such as Figure 3 As shown, the positions of the pair of upper support rods 3-12 and the pair of lower support rods 3-6 correspond to each other.

[0048] In some examples, the placement of the bolts is such that they are securely clamped in the middle by corresponding positions.

[0049] For example, such as Figure 3 As shown, the bottom cover 5-3 has a single-sided opening structure, and the bottom surface of the bottom cover 5-3 is an inclined structure.

[0050] In some examples, a single-sided opening structure allows waste residue to be discharged from one location, and the inclined structure makes the discharge smoother.

[0051] Implementation process: When using this bolt rolling mechanism, first place the bolt blank to be processed on the clamping assembly 3. At this time, the retractable rod 3-3 inside the round tube 3-2 on the base frame 3-1 is in the extended state under the action of the spring 3-4. The lower support rod 3-6 on the connecting block 3-5 supports the bolt blank. Next, start the drive screw 3-8. The drive screw 3-8 rotates and drives the slider 3-9 to move in the rectangular groove 3-7. The slider 3-9 drives the telescopic cylinder 3-10 and the top frame 3-11 to move. Adjust the position of the top frame 3-11. The upper support rod 3-12 is brought close to the bolt blank. Then, the telescopic cylinder 3-10 is activated, pushing the top frame 3-11 downward. The upper support rod 3-12 and the lower support rod 3-6 cooperate to clamp the bolt blank. After clamping the bolt blank, the movement control component 4 is activated, and the motor drives the second lead screw 4-3 to rotate. Since the bottom of the rolling rollers 2 are respectively connected to both ends of the second lead screw 4-3 through threaded connection, and the rolling rollers 2 are slidably connected to the slide rail 4-1, the rotation of the second lead screw 4-3 will cause the pair of rolling rollers 2 to rotate. The roller moves along slide rail 4-1 towards the bolt blank until it is in contact with the surface of the bolt blank. Then, the drive roller 2 rotates to begin thread rolling of the bolt blank. During the process, the bolt blank is kept stable by the support of the upper and lower support rods 3-6 to prevent downward displacement due to force. During the thread rolling process, the slag removal component 5 plays its role, and the spray pipes 5-4 on both sides of the roller 2 spray water into the inside of the roller 2 to cool the roller 2 and the bolt blank, while washing off the generated waste slag. The waste slag and water pass through the surface of the frame 1. The discharge port 5-1 is lowered, and the shield 5-2 can prevent waste residue from splashing to the outside of the equipment. The bottom cover 5-3 at the bottom of the frame 1 collects waste residue and water. The bottom cover 5-3 has a single-sided opening structure and an inclined bottom surface, which facilitates the centralized discharge of waste residue and water. The bottom cover 5-3 can be cleaned regularly to ensure that the environment around the equipment is clean. After processing is completed, the rotation of the rolling wheel 2 is stopped first, and then the drive screw 3-8 and telescopic cylinder 3-10 are started in reverse to raise the upper support rod 3-12, loosen the bolt blank, and then the processed bolt is taken out to complete one processing cycle.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A bolt thread rolling mechanism, characterized in that, include: A stand (1) and a pair of rolling rollers (2), the rolling rollers (2) being mounted on the stand (1); A movement control assembly (4) is disposed between the rolling mill (2) and the stand (1); Slag discharge assembly (5), the slag discharge assembly (5) is disposed on the surface of the frame (1); A clamping assembly (3) is disposed on the platform (1); The clamping assembly (3) includes a pair of base frames (3-1), the base frames (3-1) are fixed at both ends of the surface of the platform (1), a round tube (3-2) is fixed on the base frame (3-1), a retractable rod (3-3) is movably connected inside the round tube (3-2), a spring (3-4) is provided at the bottom inside the round tube (3-2), and a connecting block (3-5) is provided at the upper end of the retractable rod (3-3).

2. The bolt thread rolling mechanism according to claim 1, characterized in that, A pair of lower support rods (3-6) are rotatably connected between the connecting blocks (3-5). A rectangular groove (3-7) is provided on the surface of the frame (1). A drive screw (3-8) is rotatably connected in the rectangular groove (3-7). A slider (3-9) is slidably connected in the rectangular groove (3-7).

3. The bolt thread rolling mechanism according to claim 2, characterized in that, The slider (3-9) and the drive screw (3-8) are connected by a threaded connection. A telescopic cylinder (3-10) is installed on the upper end face of the slider (3-9). The output end of the telescopic cylinder (3-10) is connected to a top frame (3-11). A pair of upper support rods (3-12) are rotatably connected inside the top frame (3-11).

4. A bolt thread rolling mechanism according to claim 1, characterized in that, The motion control component (4) includes a pair of slide rails (4-1), both of which are disposed at both ends of the surface of the platform (1). The rolling wheel (2) is slidably connected to the slide rails (4-1), and the surface of the platform (1) is provided with a long groove (4-2).

5. A bolt thread rolling mechanism according to claim 4, characterized in that, The long groove (4-2) is rotatably connected to a second lead screw (4-3), which is controlled to rotate by a motor. The bottoms of a pair of rollers (2) are respectively connected to the two ends of the second lead screw (4-3) by threaded connection.

6. A bolt thread rolling mechanism according to claim 1, characterized in that, The slag discharge assembly (5) includes a discharge port (5-1), which is opened on the surface of the platform (1). A shield (5-2) is provided on the surface of the platform (1), and the shield (5-2) is located around the discharge port (5-1).

7. A bolt thread rolling mechanism according to claim 6, characterized in that, The bottom of the platform (1) is provided with a bottom cover (5-3), and spray pipes (5-4) are connected to both sides of the roller (2). A pair of spray pipes (5-4) are connected to each other, and the water outlet of the spray pipes (5-4) faces the inside of the roller (2).

8. A bolt thread rolling mechanism according to claim 3, characterized in that, The positions of the pair of upper support rods (3-12) and the pair of lower support rods (3-6) correspond to each other.

9. A bolt thread rolling mechanism according to claim 7, characterized in that, The bottom cover (5-3) has a single-sided opening structure, and the bottom surface of the bottom cover (5-3) is an inclined structure.

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