A bending device for processing a curved bar of a barbell

Abstract

The application provides a bending device for curved barbell rod processing, two preheating half-molds can form a columnar cavity for preheating the barbell rod after being combined; the bending mechanism comprises an upper bending mold and a lower bending mold which are correspondingly arranged on a bending platform and are configured to be capable of moving towards or away from each other along the Z-axis direction, a plurality of cavity stations capable of being switched by rotation are arranged on the opposite surfaces of the upper bending mold and the lower bending mold, and the upper bending mold and the lower bending mold can bend the preheating section of the barbell rod through the selected cavity station when the two preheating half-molds are separated from the barbell rod. The problems that the existing bending device for curved barbell rod processing is prone to cause uneven heating, poor dynamic stability during bending and bending angle deviation, leads to uneven local stress distribution, and affects the bending precision and the quality of finished products are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bending equipment, and particularly relates to a bending equipment for processing of a curved barbell bar. BACKGROUND

[0002] The bending processing of the curved barbell bar refers to a processing technology of bending a straight barbell bar into a specific curved shape by mechanical or manual means to meet different training requirements or design requirements.

[0003] A bending equipment for processing of a curved barbell bar is disclosed in CN117181871B, in which a top plate is fixedly arranged on the upper edge of the base through a plurality of columns, an upper die assembly and a lower die assembly are arranged between the base and the top plate and are distributed in an up-down manner, an elastic support assembly is movably arranged between the upper die assembly and the lower die assembly and is used for providing support for the barbell bar to be bent, a heating assembly is arranged at the side of the elastic support assembly and is used for heating the position of the barbell bar to be bent, and a driving assembly is arranged at the side of the upper die assembly and the lower die assembly and is used for driving the upper die assembly and the lower die assembly to move towards each other to bend the heated barbell bar. However, the structure of the above patent still has the following application defects:

[0004] Firstly, the heating assembly only heats the local part of the barbell bar, which is easy to cause uneven heating, resulting in uneven local stress distribution during bending, affecting the bending precision and the quality of the finished product.

[0005] Secondly, the elastic support assembly has complex stress in the bending process, and only relies on the elastic member and the support rod to provide sufficient dynamic stability, which is easy to cause bending angle deviation.

[0006] Therefore, how to design a bending equipment for processing of a curved barbell bar, which can uniformly heat the barbell bar and improve the bending stability, has become a problem to be solved by the person skilled in the art. SUMMARY

[0007] The purpose of the present application is to solve the problem of the existing bending equipment for processing of a curved barbell bar, which is easy to cause uneven heating and poor dynamic stability during bending and has bending angle deviation, resulting in uneven local stress distribution, affecting the bending precision and the quality of the finished product.

[0008] In order to achieve the above purpose, the present application provides a bending equipment for processing of a curved barbell bar, which comprises:

[0009] A control seat having a bending platform thereon;

[0010] The bar moving mechanism comprises a bar feeding assembly and a bar moving assembly arranged in sequence along the X-axis direction on the bending platform, the bar feeding assembly comprises a bar feeding sleeve capable of conveying the barbell bar to the bar moving assembly, and the bar moving assembly comprises a traction sleeve for traction and positioning of the barbell bar;

[0011] The preheating mechanism comprises two preheating half-molds arranged correspondingly between the bar feeding sleeve and the traction sleeve and configured to move towards or away from each other along the Y-axis direction, and the two preheating half-molds can form a columnar cavity for preheating the barbell bar after being combined.

[0012] The bending mechanism comprises an upper bending mold and a lower bending mold arranged correspondingly on the bending platform and configured to move towards or away from each other along the Z-axis direction, and the opposite surfaces of the upper bending mold and the lower bending mold are provided with a plurality of cavity stations capable of rotating switching, and when the two preheating half-molds are separated from the barbell bar, the upper bending mold and the lower bending mold can bend the preheating section of the barbell bar through the selected cavity station.

[0013] Optionally, the bar feeding assembly further comprises a first support plate, the lower end of the first support plate is connected to each corresponding sliding block, and the side away from the traction sleeve is provided with a first extension unit for driving the bar feeding sleeve to approach or move away from the first support plate.

[0014] Optionally, the upper end of the first support plate is provided with a cleaning sleeve, a plurality of cleaning units are uniformly arranged in the circumferential direction inside the cleaning sleeve, each cleaning unit comprises a spring connecting body, one end of the spring connecting body is connected to the inner wall of the cleaning sleeve, and the other end is connected with a flexible cleaning plate, and the flexible cleaning plate can clean the barbell bar.

[0015] Optionally, the bar moving assembly further comprises a second support plate, the lower end of the second support plate is connected to each corresponding sliding block, and the side away from the bar feeding sleeve is provided with a second extension unit for driving the traction sleeve to approach or move away from the second support plate.

[0016] Optionally, the first extension unit and the second extension unit each comprise a guide rod and a rotatable lead screw arranged in sequence along the Z-axis direction, and an extension frame is sleeved on the guide rod and the lead screw, so that when the lead screw rotates, the extension frame can reciprocate along the guide rod and the lead screw.

[0017] Optionally, the bar feeding sleeve is symmetrically provided with two rotatable rotating cylinders along the Y-axis direction, a plurality of arc-shaped tabs are arranged on each rotating cylinder along the circumferential side thereof, and when each rotating cylinder rotates, the plurality of arc-shaped tabs thereon can contact and push the barbell bar.

[0018] Optionally, the sending rod sleeve and the traction sleeve are provided with electric push rods arranged along the Z-axis direction, and the electric push rods are provided with curved plates for supporting the barbell bar.

[0019] Optionally, the preheating mechanism further comprises two telescopic drive frames, each of which comprises a first drive section and a second drive section, the lower end of the first drive section is connected to each of the sliders in an axially movable manner, one end of the second drive section is connected to the upper end of the first drive section in an axially movable manner, and the upper end thereof is connected to one side of each of the preheating half-molds corresponding thereto, so as to drive the two preheating half-molds to move towards or away from each other.

[0020] Optionally, the preheating mechanism further comprises two telescopic drive frames, each of which comprises a first drive section and a second drive section, the lower end of the first drive section is connected to each of the sliders in an axially movable manner, one end of the second drive section is connected to the upper end of the first drive section in an axially movable manner, and the upper end thereof is connected to one side of each of the preheating half-molds corresponding thereto, so as to drive the two preheating half-molds to move towards or away from each other.

[0021] Optionally, the upper bending die and the lower bending die are provided with support claw frames on the sides away from each other, one end of each of the support claw frames is connected to a third motor for driving the support claw frame to rotate, and the other end of the third motor is connected to an air cylinder for driving the support claw frame to move along the Z-axis direction.

[0022] The bending device for barbell bar processing has the following advantages:

[0023] The bending device for barbell bar processing has the following advantages:

[0024] According to the above, the technical scheme of the present application can effectively solve the problem of the uneven heating, poor dynamic stability during bending and bending angle deviation of the existing bending equipment for curved barbell bar processing, which leads to uneven local stress distribution, affects the bending precision and the quality of finished products.

[0025] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application can be better understood by reference to the following description taken in connection with the accompanying drawings, in which like reference numerals refer to like elements in the several figures of the drawings.

[0027] Figure 1 Fig. 1 shows a structural schematic diagram of a bending equipment for curved barbell bar processing according to an embodiment of the present application;

[0028] Figure 2 Fig. 2 shows a sectional view of the bending equipment for curved barbell bar processing according to an embodiment of the present application;

[0029] Figure 3 Fig. 3 shows a structural schematic diagram of the first extension unit or the second extension unit according to an embodiment of the present application;

[0030] Figure 4 Fig. 4 shows a structural schematic diagram of the impurity collection box according to an embodiment of the present application;

[0031] Figure 5 Fig. 5 shows a structural schematic diagram of the cleaning ring sleeve according to an embodiment of the present application;

[0032] Figure 6 Fig. 6 shows a structural schematic diagram of the bar feeding ring sleeve according to an embodiment of the present application;

[0033] Figure 7 Fig. 7 shows a sectional view of the preheating half mold from a first perspective according to an embodiment of the present application;

[0034] Figure 8 Fig. 8 shows a sectional view of the preheating half mold from a second perspective according to an embodiment of the present application.

[0035] Reference signs:

[0036] 1, control seat; 101, bending platform; 1011, sliding groove; 2, rod feeding ring; 3, traction ring; 4, preheating half mold; 401, electric heating layer; 402, heat conduction layer; 5, columnar cavity; 6, upper bending mold; 7, lower bending mold; 8, cavity station; 9, control panel; 10, sliding rail; 11, sliding block; 12, first support plate; 13, cleaning ring; 14, spring connecting body; 15, flexible cleaning plate; 16, mounting rod; 17, impurity collection box; 18, sleeve rod; 19, second support plate; 20, guide rod; 2001, guide protrusion; 21, screw rod; 2101, first motor; 22, connecting plate; 23, guide sleeve; 24, screw rod sleeve; 25, rotating drum; 2501, arc-shaped toggle; 26, electric push rod; 27, curved plate; 28, electric heating pipe; 29, heat conduction plate; 30, temperature sensor; 31, electrode plate; 32, first driving section; 33, second driving section; 34, second motor; 35, support claw frame; 36, third motor; 37, air cylinder; 38, top frame. DETAILED DESCRIPTION

[0037] In order for those skilled in the art to more fully understand the technical solutions of the present application, in the following, exemplary embodiments of the present application will be described more fully and in detail with reference to the accompanying drawings. Obviously, one or more embodiments of the application described below are only one or more of the specific manners in which the technical solutions of the present application can be implemented, and are not exhaustive. It should be understood that the technical solutions of the present application can be implemented in other manners belonging to the same general inventive concept without being limited by the exemplary described embodiments. Based on one or more embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work should belong to the scope of protection of the present application.

[0038] REFERENCE Figures 1-8 The embodiments of the present application provide a bending device for processing of a curved barbell bar, comprising:

[0039] A control seat 1 has a bending platform 101 thereon;

[0040] A rod moving mechanism comprises a rod feeding assembly and a rod moving assembly arranged in sequence on the bending platform 101 in the X-axis direction, the rod feeding assembly comprises a rod feeding ring 2 capable of conveying the barbell bar to the rod moving assembly, and the rod moving assembly comprises a traction ring 3 for traction and positioning of the barbell bar;

[0041] A preheating mechanism comprises two preheating half molds 4 arranged correspondingly between the rod feeding ring 2 and the traction ring 3 and configured to move towards or away from each other in the Y-axis direction, and the two preheating half molds 4 can form a columnar cavity 5 for preheating the barbell bar after being combined;

[0042] The bending mechanism comprises an upper bending die 6 and a lower bending die 7 which are correspondingly arranged on the bending platform 101 and are configured to be capable of moving towards or away from each other along the Z-axis direction, and the opposite surfaces of the upper bending die 6 and the lower bending die 7 are both provided with a plurality of cavity stations 8 capable of rotating switching, so that after the two preheating half dies 4 are separated from the dumbbell rod, the upper bending die 6 and the lower bending die 7 can bend the preheating section of the dumbbell rod through the selected cavity station 8.

[0043] In an embodiment, the control seat 1 is provided with a control mechanism (not shown in the figure), and the control mechanism is electrically connected with the control panel 9. Specifically, the control mechanism comprises a controller and a plurality of control circuits to receive or send control instructions under the control of the control panel 9, so as to ensure the stable operation of the bending equipment of the present application and improve the intelligent level thereof.

[0044] In an embodiment, the bending platform 101 is provided with a sliding groove 1011, the sliding groove 1011 is provided with a sliding rail 10, the sliding rail 10 is provided with three sliding blocks 11, the sending rod ring sleeve 2, the traction ring sleeve 3 and the two preheating half dies 4 are correspondingly connected to each sliding block 11 to move back and forth on the sliding rail 10. Specifically, each sliding block 11 is internally provided with a circulating rolling track, the built-in rolling balls roll between the contact surfaces of the sliding rail 10 and each sliding block 11, and a closed circulation loop is formed through the reverser to realize the reciprocating movement along the sliding rail 10, so that the dumbbell rod can be conveyed and pulled according to the bending requirement, so that the preheating section of the dumbbell rod can be accurately moved into the bending area of the upper bending die 6 and the lower bending die 7, thereby significantly improving the bending accuracy. The operation principle of each sliding block 11 described above is the existing technology, such as a linear module, which will not be described in detail herein.

[0045] In an embodiment, the sending rod assembly further comprises a first support plate 12, the lower end of the first support plate 12 is connected to each corresponding sliding block 11, and the side away from the traction ring sleeve 3 is provided with a first extension unit for driving the sending rod ring sleeve 2 to approach or move away from the first support plate 12.

[0046] In an embodiment, the upper end of the first support plate 12 is provided with a cleaning ring sleeve 13, a plurality of cleaning units are uniformly arranged in the circumferential direction of the cleaning ring sleeve 13, each cleaning unit comprises a spring connecting body 14, one end of the spring connecting body 14 is connected to the inner wall of the cleaning ring sleeve 13, and the other end is connected with a flexible cleaning plate 15, and the flexible cleaning plate 15 can clean the dumbbell rod.

[0047] In a specific embodiment, one end of the flexible cleaning plate 15 in each cleaning unit is lapped on the upper end of the adjacent flexible cleaning plate 15, and is configured to be capable of moving along the adjacent flexible cleaning plate 15.

[0048] Specifically, the flexible cleaning plate 15 is made of a silica gel-based nanocomposite cleaning plate, which has the flexibility of silica gel and the moderate hardness of aluminum oxide, can accurately fit the curved surface of the barbell rod, and can efficiently remove sweat stains, oxidation layers and metal debris through the physical friction of microcrystalline particles. Meanwhile, the honeycomb structure reduces the contact pressure to avoid scratching the surface of the barbell rod.

[0049] In addition, the flexible cleaning plate 15 arranged in sequence can be fitted to the surface of the barbell rod with different diameters under the action of the spring connecting body 14, so that various specifications of the barbell rod can be cleaned, and the flexibility of each cleaning unit is improved.

[0050] In an embodiment, the first support plate 12 is provided with a mounting rod 16, and one end of the mounting rod 16 is sleeved with a collecting box 17 with an open upper end, which is used to collect impurities cleaned by the flexible cleaning plate 15.

[0051] In a specific embodiment, the lower end of the collecting box 17 is provided with an L-shaped sleeve rod 18, which is sleeved on the mounting rod 16.

[0052] Specifically, the sleeve rod 18 can facilitate the connection and separation of the collecting box 17 and the mounting rod 16, so that the cleaning and installation of the collecting box 17 can be facilitated.

[0053] In an embodiment, the rod moving assembly further includes a second support plate 19, the lower end of the second support plate 19 is connected to each corresponding sliding block 11, and the side away from the rod feeding ring sleeve 2 is provided with a second extension unit, which is used to drive the traction ring sleeve 3 to approach or away from the second support plate 19.

[0054] In a specific embodiment, the first extension unit and the second extension unit each include a guide rod 20 and a rotatable lead screw 21 arranged in sequence along the Z-axis direction, and the guide rod 20 and the lead screw 21 are sleeved with an extension frame, so that when the lead screw 21 rotates, the extension frame can reciprocate along the guide rod 20 and the lead screw 21.

[0055] In a specific embodiment, the guide rod 20 is uniformly provided with a plurality of guide protrusions 2001 around its circumference for limiting the extension frame.

[0056] In a specific embodiment, one end of the lead screw 21 is connected with a first motor 2101 for driving the rotation thereof.

[0057] In a specific embodiment, the extension frame is divided into a connecting plate 22 and a guide sleeve 23 and a screw sleeve 24 arranged on the connecting plate 22, and the rod feeding ring 2 is arranged at the upper end of the connecting plate 22, and the guide sleeve 23 and the screw sleeve 24 are respectively sleeved on the guide rod 20 and the screw rod 21.

[0058] Specifically, the arrangement of the first extension unit and the second extension unit can further extend the extension distance of the rod feeding ring 2 and the traction ring 3 on the basis of the movement of each slider 11, so that the rod feeding and traction of the barbell rod of different lengths can be flexibly performed. At the same time, through the precise cooperation of the rod feeding ring 2 and the traction ring 3, the precise positioning of the barbell rod can be realized, thereby providing strong guarantee for the quality of the finished product after bending of the barbell rod.

[0059] In addition, the combination of the guide protrusions 2001 and the guide sleeve 23 can further improve the dynamic stability of the connecting plate 22 during rod feeding, traction and bending, reduce the influence of bending deviation and uneven local stress distribution on the barbell rod, and improve the bending accuracy of the barbell rod.

[0060] In a specific embodiment, two rotating drums 25 that can rotate are symmetrically arranged on the rod feeding ring 2 along the Y-axis direction, and a plurality of arc-shaped pushers 2501 are arranged on each rotating drum 25 along the circumferential side thereof. When each rotating drum 25 rotates, the plurality of arc-shaped pushers 2501 thereon can contact and push the barbell rod.

[0061] In a specific embodiment, the plurality of arc-shaped pushers 2501 are in the form of sheet structures made of polyurethane elastic material.

[0062] Specifically, the plurality of arc-shaped pushers 2501 made of polyurethane elastic material not only have sufficient elastic deformation ability to generate a stable pushing force, but also reduce deformation accumulation during continuous compression through high resilience, have low surface friction coefficient and strong wear resistance. When the arc-shaped pushers 2501 contact the barbell rod, they elastically deform to contact the surface of the barbell rod, generate a stable friction force through the moderate hardness thereof, push the rod body to move along the X-axis, and can avoid jamming or scratching. The arc-shaped structure of the plurality of arc-shaped pushers 2501 is in surface contact with the curved surface of the barbell rod, which converts point contact into surface contact, so that the pushing force is uniformly distributed, thereby enabling accurate transmission of the barbell rod.

[0063] In addition, the rotating drum 25 is driven to rotate by a built-in driving member electrically connected to the control mechanism, such as an internal rotary drive.

[0064] In an embodiment, the rod feeding ring 2 and the traction ring 3 each have an electric push rod 26 arranged along the Z-axis direction, and the electric push rod 26 is provided with a curved plate 27 for supporting the barbell rod.

[0065] Specifically, the curved plate 27 adopts an aluminum alloy substrate coated with a polytetrafluoroethylene coating, wherein the aluminum alloy provides rigid support, and the polytetrafluoroethylene coating reduces friction with the barbell rod through self-lubricating properties, allowing the barbell rod to smoothly slide during the bending process, while the wear resistance and chemical stability of the polytetrafluoroethylene coating prevent the coating from falling off, ensuring that the rod surface is not scratched during long-term use, thereby achieving precise support and dynamic adjustment of the barbell rod during the bending process.

[0066] In addition, the multiple curved plates of the curved plate can more flexibly adapt to the bending operation of the barbell rod and provide precise support to the barbell rod from multiple angles. The electric push rod 26 can adjust the height of the curved plate 27 in real time, so that the curved plate 27 always conforms to the bending trajectory of the barbell rod, avoiding deformation errors caused by gravity sagging or local stress concentration of the barbell rod, and significantly improving the bending accuracy. The aluminum alloy substrate coated with a polytetrafluoroethylene coating and the electric push rod are both prior art, and their principles will not be described in detail here.

[0067] In one embodiment, each preheating half mold 4 is sequentially provided with an electric heating layer 401 and a heat conducting layer 402. The electric heating layer 401 is provided with a plurality of electric heating pipes 28 arranged in a spiral gradient, and the heat conducting layer 402 is provided with a plurality of heat conducting plates 29 arranged in a spiral gradient. The plurality of heat conducting plates 29 are used to guide the heat generated by the plurality of electric heating pipes 28 into the cylindrical cavity 5 to preheat the barbell rod.

[0068] In a specific embodiment, the plurality of electric heating pipes 28 and the plurality of heat conducting plates 29 are arranged in opposite directions.

[0069] Specifically, the plurality of electric heating pipes 28 are electrically connected to the control mechanism. When the plurality of electric heating pipes 28 are energized, heat energy is generated through the Joule heating effect, and the heat is radiated from the center to the edge of the electric heating layer 401 along the spiral gradient path. At the same time, the plurality of heat conducting plates 29 arranged in the opposite direction efficiently guide the heat into the cylindrical cavity 5, causing the surface temperature of the barbell rod to rise rapidly and uniformly, so as to eliminate internal stress of the barbell rod and improve the plasticity of the barbell rod, thereby avoiding oxidation or deformation of the barbell rod caused by local overheating, significantly improving the forming accuracy during the subsequent bending process, and reducing crack defects, so that the quality of the bent barbell rod is greatly improved.

[0070] In a specific embodiment, the heat conducting layer 402 is provided with a temperature sensor 30 for monitoring the temperature in the cylindrical cavity 5 in real time. Specifically, the temperature sensor 30 is electrically connected to the control mechanism, which can facilitate the operator to monitor the preheating temperature of the barbell rod in real time, thereby preventing the preheating of the barbell rod from being affected by excessively high or low temperature.

[0071] In a specific embodiment, two electrode plates 31 for electrically connecting the two preheating half-molds 4 are symmetrically arranged on the opposite faces of the two preheating half-molds 4. Specifically, the control circuit of the two preheating half-molds 4 electrically connected to the control mechanism is arranged in one of the preheating half-molds 4, and the two electrode plates 31 can achieve electrical connection of the two preheating half-molds 4, thereby achieving electrical control.

[0072] In an embodiment, the preheating mechanism further comprises two telescopic drive frames, each of which comprises a first drive segment 32 and a second drive segment 33, the lower end of the first drive segment 32 is axially movably connected to each corresponding sliding block 11, one end of the second drive segment 33 is axially movably connected to the upper end of the first drive segment 32, and the upper end thereof is connected to one side of each corresponding preheating half-mold 4 to drive the two preheating half-molds 4 to move towards or away from each other.

[0073] In a specific embodiment, the lower end of the first drive segment 32 is connected to a second motor 34 for driving the axial movement thereof.

[0074] Specifically, one end of the second drive segment 33 is driven to move axially by the driving member built therein, and the arrangement of the first drive segment 32 and the second drive segment 33 in combination with each corresponding sliding block 11 can achieve adjustment of the position of the two preheating half-molds 4, thereby achieving precise preheating of the preheating section of the barbell bar, improving the preheating effect and accuracy, and also ensuring the stability of the barbell bar during preheating.

[0075] In a specific embodiment, the cross-sectional shape of the upper bending die 6 and the lower bending die 7 is in the shape of a rectangular frame.

[0076] In an embodiment, the side of the upper bending die 6 and the lower bending die 7 away from each other is provided with a support claw rack 35, one end of the support claw rack 35 is connected to a third motor 36 for driving the rotation thereof, and one end of the third motor 36 is connected to an air cylinder 37 for driving the support claw rack 35 to move along the Z-axis direction.

[0077] In a specific embodiment, the upper end of the upper bending die 6 is provided with a top rack 38 for fixing the air cylinder 37.

[0078] Specifically, after preheating is completed, the preheating half-mold 4 arranged above the lower bending die 7 can penetrate the lower bending die 7 and move downward, at the same time, the upper bending die 6 and the lower bending die 7 are driven to rotate and move towards each other by the third motor 36 and the air cylinder 37, so as to rotate the waiting cavity station 8 to a position matched with the barbell bar, and then the bending of the barbell bar is achieved by the compression of the two, thereby ensuring the bending accuracy of the barbell bar.

[0079] It is worth noting that the shapes of the upper bending die 6 and the lower bending die 7 and the plurality of cavity stations 8 can be customized according to specific bending requirements to realize efficient bending of the barbell rod, and the present application is not limited thereto.

[0080] The bending equipment of the present application operates as follows:

[0081] Firstly, the lead screw 21 of the first extension unit rotates under the drive of the first motor 2101, and the extension frame drives the rod feeding ring 2 to move along the guide rod 20 to the rod connecting position. The electric push rod 26 in the rod feeding ring 2 pushes the curved plate 27 to rise, and the curved plate 27 supports the barbell rod.

[0082] Then, the two rotating cylinders 25 on the rod feeding ring 2 rotate under the drive of the built-in driving member, and the plurality of arc-shaped paddles 2501 are sequentially contacted with the barbell rod to push the barbell rod to move along the X-axis to the traction ring 3.

[0083] At the same time, the barbell rod passes through the cleaning ring 13 on the first support plate 12 during the conveying process, and the spring connecting body 14 and the flexible cleaning plate 15 on the inner wall of the cleaning ring 13 are attached to and clean the surface of the barbell rod. The impurities cleaned out fall into the impurity collecting box 17 for collection.

[0084] Then, the lead screw 21 of the second extension unit rotates under the drive of the first motor 2101, and the extension frame drives the traction ring 3 to move along the guide rod 20 to the traction position. The electric push rod 26 in the traction ring 3 pushes the curved plate 27 to rise, supports the barbell rod and adjusts the height to ensure that the barbell rod is horizontal. The traction ring 3 is contacted with the barbell rod through the curved plate 27, and moves along the sliding rail 10 under the drive of the sliding block 11 to accurately convey the preheating section of the barbell rod to the bending area of the upper bending die 6 and the lower bending die 7.

[0085] Next, the first driving section 32 of the telescopic driving frame is axially movable under the drive of the second motor 34, and the second driving section 33 adjusts the angle through the built-in driving member, drives the two preheating half-molds 4 to move along the Y-axis and combine with each other to form a columnar cavity 5. The electrode plate 31 realizes the electrical connection of the two preheating half-molds 4, the control mechanism generates heat through the electrification of the electric heating pipe 28 in the electric heating layer 401. The heat-conducting plate 29 in the heat-conducting layer 402 efficiently conducts heat into the columnar cavity 5, so that the surface temperature of the barbell rod rapidly and uniformly rises. The temperature sensor 30 monitors the temperature in the columnar cavity 5 in real time and feeds back to the control mechanism to prevent the temperature from being too high or too low to affect the preheating effect.

[0086] After preheating is completed, the telescopic drive frame drives the two preheating half-molds 4 to move away from each other along the Y axis, and the barbell rod is separated. The preheating half-mold 4 arranged above the lower bending mold 7 penetrates the lower bending mold 7 and moves downward. The support claw frame 35 rotates under the drive of the third motor 36, drives the upper bending mold 6 and the lower bending mold 7 to rotate, and rotates the selected cavity working position 8 to the position matched with the barbell rod. The cylinder 37 drives the support claw frame 35 to move along the Z axis, and adjusts the distance between the upper bending mold 6 and the lower bending mold 7.

[0087] Finally, the upper bending mold 6 and the lower bending mold 7 move towards each other under the drive of the cylinder 37, and the preheating section of the barbell rod is pressed and bent through the selected cavity working position 8.

[0088] After bending is completed, the traction ring sleeve 3 retreats under the drive of the second extension unit, releases the barbell rod, and the operator takes out the finished product.

[0089] The bending equipment for the curved rod barbell rod processing can realize accurate positioning of the barbell rod through accurate cooperation of the rod feeding ring sleeve and the traction ring sleeve, and can provide strong guarantee for the finished product quality of the bent barbell rod. Through the two preheating half-molds arranged between the rod feeding ring sleeve and the traction ring sleeve and configured to move towards or away from each other along the Y axis direction, the preheating section of the barbell rod can be accurately preheated, the preheating effect and accuracy are improved, and the stability of the barbell rod during preheating can be guaranteed. Through the upper bending mold and the lower bending mold arranged on the bending platform and configured to move towards or away from each other along the Z axis direction, a plurality of cavity working positions capable of rotating switching are arranged on the opposite surfaces of the upper bending mold and the lower bending mold. When the two preheating half-molds are separated from the barbell rod, the upper bending mold and the lower bending mold can bend the preheating section of the barbell rod through the selected cavity working position. Compared with the existing bending equipment for curved rod barbell rod processing, the bending equipment can improve the dynamic stability of the barbell rod during bending, reduce the influence of bending deviation and uneven local stress distribution on the barbell rod, and improve the bending precision and finished product quality of the barbell rod.

[0090] Although one or more embodiments of the present application have been described above, it should be understood by those skilled in the art that the present application can be implemented in any other form without departing from the spirit and scope of the present application. Therefore, the above-described embodiments are illustrative rather than limiting, and many modifications and substitutions are obvious to those skilled in the art without departing from the spirit and scope of the present application as defined by the appended claims.

Claims

1. A bending apparatus for bending a barbell bar for a curl bar, characterized by, The utility model relates to a barbell bending machine, including: A control seat has a bending platform on it; A bar moving mechanism includes a bar feeding assembly and a bar moving assembly arranged in sequence on the bending platform along the X-axis direction, the bar feeding assembly includes a bar feeding ring sleeve capable of conveying the barbell bar to the bar moving assembly, and the bar moving assembly includes a traction ring sleeve for traction and positioning of the barbell bar; A preheating mechanism includes two preheating half-molds arranged correspondingly between the bar feeding ring sleeve and the traction ring sleeve and configured to move towards or away from each other along the Y-axis direction, and the two preheating half-molds can form a columnar cavity for preheating the barbell bar after being combined; A bending mechanism includes an upper bending mold and a lower bending mold arranged correspondingly on the bending platform and configured to move towards or away from each other along the Z-axis direction, the opposite faces of the upper bending mold and the lower bending mold are each provided with a plurality of cavity stations capable of rotating switching, and the upper bending mold and the lower bending mold can bend the preheating section of the barbell bar through the selected cavity station after the two preheating half-molds are separated from the barbell bar; The preheating mechanism further includes two telescopic drive frames, each of which includes a first drive section and a second drive section, the lower end of the first drive section is connected to each corresponding slide block in an axially movable manner, one end of the second drive section is connected to the upper end of the first drive section in an axially movable manner, and the upper end thereof is connected to one side of each corresponding preheating half-mold to drive the two preheating half-molds to move towards or away from each other; The side of the upper bending mold and the lower bending mold away from each other is provided with a support claw frame, one end of the support claw frame is connected with a third motor for driving it to rotate, and one end of the third motor is connected with an air cylinder for driving the support claw frame to move along the Z-axis direction.

2. The bending apparatus for processing a curved barbell bar according to claim 1, characterized in that, The bar feeding assembly further includes a first support plate, the lower end of the first support plate is connected to each corresponding slide block, and the side of the first support plate away from the traction ring sleeve is provided with a first extension unit for driving the bar feeding ring sleeve to approach or move away from the first support plate.

3. The bending apparatus for a cambered barbell bar machining according to claim 2, characterized in that, The upper end of the first support plate is provided with a cleaning ring sleeve, a plurality of cleaning units are uniformly arranged in the cleaning ring sleeve along the circumferential direction thereof, each cleaning unit includes a spring connecting body, one end of the spring connecting body is connected to the inner wall of the cleaning ring sleeve, and the other end thereof is connected with a flexible cleaning plate capable of cleaning the barbell bar.

4. The bending apparatus for processing a curved barbell bar according to claim 3, wherein The bar moving assembly further includes a second support plate, the lower end of the second support plate is connected to each corresponding slide block, and the side of the second support plate away from the bar feeding ring sleeve is provided with a second extension unit for driving the traction ring sleeve to approach or move away from the second support plate.

5. The bending apparatus for processing of a cambered barbell bar according to claim 4, characterized in that The first extension unit and the second extension unit each include a guide rod and a screw rod capable of rotating arranged in sequence along the Z-axis direction, an extension frame is sleeved on the guide rod and the screw rod, so that the extension frame can reciprocate along the guide rod and the screw rod when the screw rod rotates.

6. The bending apparatus for a cambered barbell bar machining according to claim 5, characterized in that, Two rotating cylinders capable of rotating are symmetrically arranged on the bar feeding ring sleeve along the Y-axis direction, a plurality of arc-shaped tabs are arranged on each rotating cylinder along the circumferential side thereof, and the arc-shaped tabs on each rotating cylinder can contact and push the barbell bar when the rotating cylinder rotates.

7. The bending apparatus for processing a curved barbell bar according to claim 6, wherein The sending rod sleeve and the traction sleeve are provided with electric push rods arranged along the Z-axis direction, and the electric push rods are provided with curved plates for supporting the barbell rod.

8. The bending apparatus for processing a curved barbell bar according to claim 7, wherein Each of the preheating half-molds is sequentially provided with an electric heating layer and a heat conduction layer. The electric heating layer is provided with a plurality of electric heating pipes arranged in a spiral gradient. The heat conduction layer is provided with a plurality of heat conduction plates arranged in a spiral gradient. The plurality of heat conduction plates are used for guiding the heat generated by the plurality of electric heating pipes into the columnar cavity to preheat the barbell rod.

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