A bicycle front fork arm arc cutting device and its usage method

Abstract

The present invention relates to the technical field of bicycles, a bicycle front fork arm arc cutting device and its use method. The device includes a frame and a feeding and transferring device, a front fork arm clamping device, an arc cutting device, a material taking device and a die changing device thereon; the feeding and transferring device includes a first front fork arm feeding mechanism, a second front fork arm feeding mechanism and a front fork arm transferring mechanism; the first front fork arm feeding mechanism and the second front fork arm feeding mechanism are respectively used for conveying the front fork arms to the front fork arm transferring mechanism, and the front fork arm transferring mechanism is used for transferring the two front fork arms to the front fork arm clamping device, and the front fork arm clamping device is used for clamping and fixing the two front fork arms; the arc cutting device is used for cutting the two clamped front fork arms; the material taking device is used for conveying the two cut front fork arms out of the machine; the die changing device is used for replacing the die on the front fork arm clamping device. The advantage of the present invention is to further improve the arc cutting efficiency of the bicycle front fork arm.

Description

Technical Field

[0001] The present invention relates to the technical field of bicycles, and in particular to a cutting device for the arc openings of bicycle front fork arms and a method for using the same. Background Art

[0002] The bicycle front fork is a very important component of a bicycle, and the front fork includes two front fork arms. Since different specifications of front fork arms need to be configured according to different models of bicycles, the arc openings of the two front fork arms need to be cut as specified.

[0003] In actual production, there are the following problems in the production of front fork arms: (1) The existing devices can only produce and process one front fork arm, and a bicycle requires a pair of front fork arms, which makes the subsequent production and assembly of front fork arms inconvenient, thereby affecting the overall production efficiency and quality of front fork arms; (2) It is impossible to accurately move and position the front fork arm to a specified position, and there is no pre-positioning of the front fork arm before cutting. It is very easy for the position of the front fork arm to be misaligned with the position of the template during the arc opening cutting process, resulting in the rejection of the cut front fork arm, thereby not only affecting the processing efficiency but also the processing quality; (3) During the clamping process of the front fork arm, the existing devices can only fix a single front fork arm and the clamping effect is poor. Therefore, during the arc opening cutting process, it is easy for the front fork arm to loosen, resulting in the inability to guarantee the accuracy of the arc opening cutting of the front fork arm; and it can only be used for one model of front fork arm. It is impossible to quickly replace the template according to the required front fork arm model, and only through cumbersome disassembly and assembly by manual can the template be replaced. Therefore, a large amount of time and manpower are wasted during the process of model conversion, greatly affecting the production efficiency; (4) During the cutting process of the front fork arm, the existing devices can only cut a single front fork arm, and the cutting effect is poor, which will slow down the overall production process of the front fork arm and greatly affect the production progress; (5) The existing devices do not have a die-changing device for the front fork arm, which results in that one device can only cut one model of front fork arm, and it is necessary to manually replace the die on the device. Therefore, it is not convenient to quickly replace the die when producing front fork arms of different models, thus affecting the production efficiency; (6) It is impossible to realize the full-automatic cutting of the front fork arm, and manual operation is still required in the middle, which is time-consuming and laborious. Summary of the Invention

[0004] The present invention aims to solve the technical problems of low cutting efficiency and quality of the arc openings of bicycle front fork arms, and provides a cutting device for the arc openings of bicycle front fork arms that can improve the conveying efficiency of front fork arms, improve the clamping effect of front fork arms, improve the quality of cutting arc openings, improve the die-changing efficiency, and improve the overall cutting efficiency and quality of the arc openings of bicycle front fork arms.

[0005] For the purpose of the present invention, the following technical solutions are adopted to achieve it:

[0006] A bicycle front fork arm arc cutting device, which includes a frame and a feeding and transferring device, a front fork arm clamping device, an arc cutting device, a material taking device and a die changing device thereon; the feeding and transferring device includes a first front fork arm feeding mechanism, a second front fork arm feeding mechanism and a front fork arm transferring mechanism; the first front fork arm feeding mechanism and the second front fork arm feeding mechanism are respectively used to convey the front fork arms to the front fork arm transferring mechanism, and the front fork arm transferring mechanism is used to transfer two front fork arms to the front fork arm clamping device, and the front fork arm clamping device is used to clamp and fix the two front fork arms; the arc cutting device is used to cut the two clamped front fork arms; the material taking device is used to convey the two cut front fork arms out of the device; the die changing device is used to replace the die on the front fork arm clamping device. This device improves the conveying efficiency of the front fork arms through the feeding and transferring device; improves the clamping effect of the front fork arms through the front fork arm clamping device; improves the quality of the arc cutting through the arc cutting device; and improves the die changing efficiency through the die changing device, thereby improving the overall cutting efficiency and quality of the bicycle front fork arm arc.

[0007] Preferably, the first front fork arm feeding mechanism and the second front fork arm feeding mechanism are symmetrically arranged and have the same structure; the first front fork arm feeding mechanism includes a front fork arm feeding component and a front fork arm connecting component; the front fork arm feeding component includes a U-shaped bracket, a feeding inclined frame, a feeding pushing cylinder, a first feeding connecting plate, a second feeding connecting plate and an intermediate connecting plate; the U-shaped bracket is arranged on the frame, and the opening of the U-shaped bracket faces forward; the feeding inclined frame is arranged at the front part of the U-shaped bracket, and the feeding inclined frame inclines backward and downward; the feeding pushing cylinder is longitudinally arranged on the frame and is located between the feeding inclined frame and the U-shaped bracket; the top of the feeding pushing cylinder is connected with a pushing plate arranged in the front-rear direction; the front part of the pushing plate is fixedly connected with the first feeding connecting plate, the rear part of the pushing plate is fixedly connected with the second feeding connecting plate, and the first feeding connecting plate and the second feeding connecting plate are respectively located inside the opening of the U-shaped bracket; the tops of the first feeding connecting plate and the second feeding connecting plate are both provided with inclined surfaces that incline backward and downward, and a pushing baffle is arranged at the front part of the inclined surface; the intermediate connecting plate is fixedly arranged on the U-shaped bracket and is located between the first feeding connecting plate and the second feeding connecting plate; the top of the intermediate connecting plate is provided with a connecting inclined surface that inclines backward and downward; limiting baffles for limiting the first feeding connecting plate, the second feeding connecting plate and the intermediate connecting plate are symmetrically arranged on the two side plates of the U-shaped bracket.

[0008] Preferably, the front fork arm connection assembly includes a connection cylinder, a connection rotating plate, a hinge fixing plate, a connection rotating cylinder, a front fork arm connection plate, and a front fork arm connection conveying group; the connection cylinder is arranged obliquely; the lower end of the connection cylinder is hinged below the rear part of the U-shaped bracket; the upper end of the connection cylinder is hinged to the lower part of the connection rotating plate, the connection rotating plate is hinged to the hinge fixing plate, and the hinge fixing plate is fixed above the rear part of the U-shaped bracket; the connection rotating cylinder is arranged on the connection rotating plate, the front fork arm connection plate is arranged on the moving part of the connection rotating cylinder, and a connection groove for placing the front fork arm is arranged on the front fork arm connection plate; the front fork arm connection conveying group is connected to the front fork arm connection plate; the front fork arm connection conveying group includes a front fork arm connection conveying bracket and a front fork arm connection conveying plate; the front fork arm connection conveying plate is arranged on the front fork arm connection conveying bracket, the front end of the front fork arm connection conveying plate is connected to the front fork arm connection plate, and the rear end of the front fork arm connection conveying plate is connected with an arc connection plate for placing the arc opening of the front fork arm.

[0009] Preferably, the front fork arm transfer mechanism includes a first front fork arm transfer component, a front fork arm positioning component, and a second front fork arm transfer component; the first front fork arm transfer component and the second front fork arm transfer component are respectively front fork arm transfer manipulators, and two clamping parts are arranged on the front fork arm transfer manipulator; the front fork arm positioning component includes a front fork arm positioning bracket, a first front fork arm positioning plate, a second front fork arm positioning plate, a front clamping and positioning electric cylinder, and a rear clamping and positioning cylinder; the front fork arm positioning bracket is arranged on the frame; the first front fork arm positioning plate and the second front fork arm positioning plate are arranged in parallel front and rear on the front fork arm positioning bracket; two front fork arm limiting grooves are arranged on both the first front fork arm positioning plate and the second front fork arm positioning plate; the front clamping and positioning electric cylinder is arranged in the front-rear direction on the frame and is located on the front side of the front fork arm positioning bracket, and a clamping and positioning frame is arranged on the moving part of the front clamping and positioning electric cylinder; two clamping and positioning blocks are arranged on the rear side surface of the clamping and positioning frame; the rear clamping and positioning cylinder is arranged in the front-rear direction on the frame and is located on the rear side of the front fork arm positioning bracket; the front part of the rear clamping and positioning cylinder is connected with a clamping and positioning plate.

[0010] Preferably, the front fork arm clamping device includes an upper die clamping mechanism and a lower die clamping mechanism; the upper die clamping mechanism and the lower die clamping mechanism are arranged on a frame. The upper die clamping mechanism includes a front fork arm clamping bracket, an upper die clamping oil cylinder, an upper die clamping and locking assembly, and an upper template group; the front fork arm clamping bracket is arranged on the frame, the upper die clamping oil cylinder is arranged at the top of the front fork arm clamping bracket, the moving part of the upper die clamping oil cylinder passes through the front fork arm clamping bracket and is connected with the upper die clamping and locking assembly, and the upper template group is fixedly matched with the upper die clamping and locking assembly; the lower die clamping mechanism includes a lower die clamping base, a lower template group and a lower die clamping and locking assembly; the lower die clamping base is arranged on the frame, and the lower template group is placed on the lower die clamping base; the lower die clamping and locking assembly is fixedly matched with the lower template group to fix the lower template group.

[0011] Preferably, the upper die clamping and locking assembly includes an upper die connecting sleeve, a first upper die clamping and locking cylinder and a second upper die clamping and locking cylinder; the upper die connecting sleeve is connected with the moving part of the upper die clamping oil cylinder; a template fixing through hole for fixing the upper template is arranged in the middle of the upper die connecting sleeve; the first upper die clamping and locking cylinder and the second upper die clamping and locking cylinder are respectively arranged on the left and right sides of the upper die connecting sleeve, and a clamping and locking block is connected to the moving parts of the first upper die clamping and locking cylinder and the second upper die clamping and locking cylinder; the clamping and locking block enters the upper die connecting sleeve and communicates with the template fixing through hole; the lower die clamping base includes a first lower die clamping support block, a second lower die clamping support block and a third lower die clamping support block; two die changing clamping and taking voids for die changing are formed between the first lower die clamping support block, the second lower die clamping support block and the third lower die clamping support block; lower die positioning convex blocks are arranged on both the first lower die clamping support block and the third lower die clamping support block; the lower die clamping and locking assembly includes two screwing and clamping cylinders; the two screwing and clamping cylinders are respectively located on the left and right sides of the lower die clamping base; a front fork arm support auxiliary cylinder is further arranged on the front side of the lower die clamping mechanism, and a support auxiliary plate is horizontally arranged on the front fork arm support auxiliary cylinder.

[0012] Preferably, the upper template group includes an upper die connector, an upper die connecting plate and an upper template; locking clamping grooves that cooperate with the die clamping blocks are arranged on the left and right sides of the upper die connector; the upper die connecting plate is connected to the bottom of the upper die connector; the upper template is connected to the bottom of the upper die connecting plate; an upper cutting groove for cutting is arranged in the middle of the bottom surface of the upper template, and upper front fork arm cutting grooves are arranged on the left and right sides of the bottom surface of the upper template; template positioning holes are arranged on the left and right sides of the bottom surface of the upper template; the two template positioning holes are respectively located outside the two front fork arm cutting grooves; the lower template group includes a lower die support plate and a lower template; lower template grooves that cooperate with the lower die positioning bumps are arranged on the left and right sides of the bottom surface of the lower die support plate; die change positioning holes for die change are arranged on the left and right sides of the bottom surface of the lower die support plate; and the two die change positioning holes are located at two die change clamping neutral positions; the lower template is connected to the top surface of the lower die support plate; a lower cutting groove for cutting is arranged in the middle of the top surface of the lower template; the lower cutting groove and the upper cutting groove cooperate to form a template cutting through hole; lower front fork arm cutting grooves are arranged on the left and right sides of the top surface of the lower template; the lower front fork arm cutting grooves and the upper front fork arm cutting grooves cooperate to form front fork arm holes; template positioning bumps are arranged on the left and right sides of the top surface of the lower template; and the template positioning bumps and the template positioning holes cooperate for positioning.

[0013] Preferably, the arc cutting device includes an arc cutting support, an arc cutting driving oil cylinder and a cutting assembly; the arc cutting support is arranged at the rear of the front fork arm clamping device, and the arc cutting driving oil cylinder is arranged in the front-rear direction at the rear of the arc cutting support; the front end of the arc cutting driving oil cylinder passes through the arc cutting support and is connected to the cutting assembly, and the cutting assembly includes a cutting connecting rod, a first cutting knife and a second cutting knife; the rear end of the cutting connecting rod is fixedly connected to the front end of the arc cutting driving oil cylinder through an oil cylinder connecting sleeve, and the first cutting knife and the second cutting knife are respectively arranged on both sides of the front end of the cutting connecting rod; the cross section of the cutting connecting rod is T-shaped, and the first cutting knife and the second cutting knife are respectively arranged on both sides of the short plate of the cutting connecting rod. The first cutting knife and the second cutting knife are symmetrically arranged and have the same structure, and a cutting inclined surface is arranged at the rear end of the first cutting knife; a cutting limiting plate is arranged on the frame below the cutting connecting rod; and a limiting U-shaped notch that cooperates with the cutting connecting rod is arranged on the cutting limiting plate.

[0014] Preferably, the die change device includes a template storage rack and a template clamping and transfer mechanism; the template storage rack is arranged on the machine frame, and a plurality of template placement stations for placing templates are arranged on the template storage rack; a longitudinal middle baffle is arranged in the middle of the template storage rack, and two storage areas are formed by the middle baffle; U-shaped template storage plates for storing templates are arranged on the upper and lower sides of each storage area; template storage positioning convex heads are arranged on the left and right sides of each U-shaped template storage plate; the template clamping and transfer mechanism includes a die change horizontal movement component, a die change lifting movement component and a die change grabbing component; the die change lifting movement component is arranged on the moving part of the die change horizontal movement component, and the template grabbing component is arranged on the moving part of the die change lifting movement component. The template grabbing component clamps and transfers the template on the template storage rack through horizontal lifting positioning; the die change horizontal movement component includes a die change horizontal movement support and a die change horizontal movement electric cylinder; the die change horizontal movement support is arranged on the machine frame, and the die change horizontal movement electric cylinder is arranged on the die change horizontal movement support; the die change lifting movement component includes a die change lifting movement support and a die change lifting movement electric cylinder; the die change lifting movement support is arranged on the moving plate of the die change horizontal movement electric cylinder, and the die change lifting movement electric cylinder is longitudinally arranged on the die change lifting movement support; the template grabbing component includes a template grabbing frame, a template grabbing cylinder and a template grabbing cylinder connecting plate; the template grabbing frame is arranged on the moving plate of the die change lifting movement electric cylinder, the template grabbing cylinder is arranged at the bottom of the template grabbing frame, the middle of the template grabbing cylinder connecting plate is connected to the moving part of the template grabbing cylinder, and both ends of the template grabbing cylinder connecting plate are connected to template grabbing rods; the top of the template grabbing rod is connected to a template grabbing slide rod; the template grabbing slide rod is slidably connected to the bottom of the template grabbing frame through a template grabbing slider; a grabbing positioning convex block matching with the bottom of the template is arranged at the rear end of the template grabbing rod.

[0015] A using method of a bicycle front fork arm arc cutting device, which is realized by the above-mentioned bicycle front fork arm arc cutting device; successively through the following steps:

[0016] (1) Feeding of the front fork arm: Pour the front fork arm parts into the first front fork arm feeding mechanism and the second front fork arm feeding mechanism; transfer the front fork arms on the first front fork arm feeding mechanism and the second front fork arm feeding mechanism to the front fork arm positioning component for positioning through the first front fork arm transfer component on the front fork arm transfer mechanism; transfer the two front fork arms to the front fork arm clamping device through the second front fork arm transfer component;

[0017] (2) Positioning and clamping of the front fork arm: Clamp and fix the two front fork arms through the upper die clamping mechanism and the lower die clamping mechanism on the front fork arm clamping device;

[0018] (3) Fork arm cutting and forming: Pull backward through the arc cutting device to cut the arc openings of the two clamped fork arms;

[0019] (4) Fork arm conveying and discharging: Convey and discharge the two cut fork arms through the picking device by means of the picking manipulator;

[0020] (5) Fork arm die replacement: When changing to another model, transfer the template of the fork arm clamping device to the template storage rack through the template clamping and transfer mechanism on the die change device, and then clamp a new template from the template storage rack and install it on the fork arm clamping device.

[0021] A bicycle fork arm arc cutting device adopting the above technical solution can simultaneously convey a pair of fork arms through the first fork arm feeding mechanism and the second fork arm feeding mechanism on the feeding transfer device, which can just correspond to the assembly of a bicycle and can further improve the conveying efficiency of the fork arms. The inclined surface facilitates the fork arms to fall into the placement. The pushing baffle can ensure the stability of the fork arms during the rising process to ensure that they will not fall during transportation. The top of the middle connecting plate is provided with a connecting inclined surface that slopes backward and downward. Through the connecting inclined surface, the fork arms on the first feeding connecting plate can fall onto the middle connecting plate and wait. The limit baffle can prevent the first feeding connecting plate and the second feeding connecting plate from swaying back and forth during the rising process and can ensure stable transportation. The connecting groove facilitates better placement of the fork arms and can also better limit the fork arms. The two fork arm limit grooves facilitate placing the two fork arms in the two fork arm limit grooves and can limit the two fork arms in the fork arm limit grooves. The front clamping and positioning electric cylinder drives the clamping and positioning frame to clamp the front parts of the two fork arms backward. The rear clamping and positioning cylinder drives the clamping and positioning plate to clamp the rear parts of the two fork arms forward, so that the two fork arms can be accurately positioned on the fork arm positioning bracket.

[0022] The template fixing through holes on the front fork arm clamping device facilitate the insertion of the top of the upper template group for locking and fixing. The mold clamping block enters the upper die connecting sleeve and communicates with the template fixing through holes, and the mold clamping block clamps inward to clamp and fix the top of the upper template group. By matching the lower die positioning convex block with the lower template group, the lower template group can be accurately installed on the first lower die clamping support block and the third lower die clamping support block. By driving the support auxiliary plate to rise through the front fork arm support auxiliary cylinder, a good support can be provided to prevent the two front fork arms from falling before they are transferred to the lower die for mold clamping and fixed. By driving the mold clamping block to move inward through the first upper die mold clamping cylinder and the second upper die mold clamping cylinder, the mold clamping blocks on both sides are clamped into the two mold clamping grooves for fixing. The two template positioning holes facilitate better positioning with the lower template group, which can further ensure the alignment degree during coincidence. The die change positioning hole can better cooperate with the die change device, facilitating the more accurate clamping of the die change device and better ensuring the stability during the transfer process. The template positioning convex block and the template positioning hole are matched for positioning, facilitating the alignment and fitting of the upper template and the lower template, and further ensuring the clamping accuracy.

[0023] The T-shaped structure on the arc cutting device facilitates the installation of the first cutting knife and the second cutting knife and enables simultaneous cutting. The first cutting knife and the second cutting knife can simultaneously cut the two front fork arms, further improving the cutting efficiency. The cutting inclined surface can further ensure the cutting accuracy and cutting quality. The cutting limit plate can ensure the accuracy of the cutting connecting rod during movement and prevent the cutting connecting rod from moving and deviating.

[0024] The U-shaped template placing plate on the die change device facilitates the taking of the template grasping assembly, facilitating placement and transfer. The template placing positioning convex head facilitates matching with the lower template groove, enabling the template to be accurately placed on the U-shaped template placing plate. The template grasping cylinder drives the two connecting template grasping rods on the template grasping cylinder connecting plate to move forward and backward for positioning. The cooperation between the template grasping slider and the template grasping slide rod facilitates improving the smoothness during movement. The grasping positioning convex block and the die change positioning hole are matched, facilitating the template grasping rod to stably take the template and accurately transfer it, improving the taking efficiency and replacement efficiency during the die change process.

[0025] In summary, the advantages of the present invention are to achieve full-automatic cutting, without manual operation, saving time and effort, and further improving the arc cutting efficiency and arc cutting quality of the bicycle front fork arm. Brief Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of an arc cutting device for a bicycle front fork arm of the present invention.

[0027] Figure 2 It is a schematic structural view of the feeding transfer device in the present invention.

[0028] Figure 3 It is a schematic structural view of the first front fork arm feeding mechanism in the present invention.

[0029] Figure 4 It is a schematic structural view of the front fork arm positioning assembly in the present invention.

[0030] Figure 5 It is a schematic structural view of the front fork arm clamping device in the present invention.

[0031] Figure 6 It is a cross-sectional view of the upper die clamping mechanism in the present invention.

[0032] Figure 7 It is a schematic structural view of the upper die clamping mechanism in the present invention.

[0033] Figure 8 It is a schematic structural view of the lower die clamping mechanism in the present invention.

[0034] Figure 9 It is a schematic structural view of the arc-shaped opening cutting device in the present invention.

[0035] Figure 10 It is a schematic structural view of the die changing device in the present invention.

[0036] Figure 11 It is a schematic structural view of the template clamping and transferring mechanism in the present invention. Detailed implementation manners

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation manners.

[0038] As Figure 1 shown, in the specific embodiment, the front, rear, upper, lower, left, and right directions are based on Figure 1 and the upper and lower are the upper side and lower side in Figure 1 the left and right are the left side and right side in Figure 1 and the front and rear are the front side and rear side in Figure 1

[0039] As Figure 1 ​As shown in the figure, a cutting device for the arc openings of bicycle front fork arms, the device comprising a frame and a feeding and transferring device 1, a front fork arm clamping device 2, an arc opening cutting device 3, a material taking device 4 and a die changing device 5 thereon; the feeding and transferring device 1 includes a first front fork arm feeding mechanism, a second front fork arm feeding mechanism and a front fork arm transferring mechanism; the first front fork arm feeding mechanism and the second front fork arm feeding mechanism are respectively used for conveying the front fork arms to the front fork arm transferring mechanism, and the front fork arm transferring mechanism is used for transferring the two front fork arms to the front fork arm clamping device 2, and the front fork arm clamping device 2 is used for clamping and fixing the two front fork arms; the arc opening cutting device 3 is used for cutting the two clamped front fork arms; the material taking device 4 is used for conveying the two cut front fork arms out of the device; and the die changing device 5 is used for replacing the die on the front fork arm clamping device 2.

[0040] As Figure 4 shown, 6 in the figure are the two front fork arms 6 to be processed, the two front fork arms 6 are symmetrically arranged, and the front parts of the two front fork arms 6 are the front fork arm arc openings 61. Since different models of bicycles require front fork arm arc openings 61 of different lengths, during the production process, the front fork arm arc openings 61 need to be cut, and after being cut to the specified length, it is convenient for subsequent processing.

[0041] As Figure 2 and Figure 3As shown, the first front fork arm feeding mechanism and the second front fork arm feeding mechanism are symmetrically arranged and have the same structure. By means of the first front fork arm feeding mechanism and the second front fork arm feeding mechanism, a pair of front fork arms 6 can be conveyed simultaneously, so that it can just correspond to the assembly of a bicycle, and the feeding efficiency of the front fork arms can be further improved. The first front fork arm feeding mechanism includes a front fork arm feeding component 11 and a front fork arm connection component 12. The front fork arm feeding component 11 includes a U-shaped bracket 111, a feeding inclined frame 112, a feeding push cylinder 113, a first feeding connection plate 114, a second feeding connection plate 115 and an intermediate connection plate 116. The U-shaped bracket 111 is arranged on the frame, and the opening of the U-shaped bracket 111 faces forward. The feeding inclined frame 112 is arranged at the front part of the U-shaped bracket 111, and the feeding inclined frame 112 is inclined backward and downward. Through the feeding inclined frame 112, it is convenient for the front fork arm 6 to be fed and fall backward onto the first feeding connection plate 114. The feeding push cylinder 113 is longitudinally arranged on the frame and is located between the feeding inclined frame 112 and the U-shaped bracket 111. The top of the feeding push cylinder 113 is connected with a push plate 1131 arranged in the front-rear direction. The front part of the push plate 1131 is fixedly connected with the first feeding connection plate 114, and the rear part of the push plate 1131 is fixedly connected with the second feeding connection plate 115. The first feeding connection plate 114 and the second feeding connection plate 115 are respectively located inside the opening of the U-shaped bracket 111. The tops of the first feeding connection plate 114 and the second feeding connection plate 115 are both provided with inclined surfaces 1141 inclined backward and downward. Through the inclined surfaces 1141, it is convenient for the front fork arm 6 to fall and be placed. A push baffle 1142 is arranged at the front part of the inclined surface 1141. Through the push baffle 1142, the front fork arm 6 can ensure stability during the rising process and ensure that it will not fall during transportation. The intermediate connection plate 116 is fixedly arranged on the U-shaped bracket 111 and is located between the first feeding connection plate 114 and the second feeding connection plate 115. The top of the intermediate connection plate 116 is provided with an inclined connection surface 1161 inclined backward and downward. Through the inclined connection surface 1161, the front fork arm 6 on the first feeding connection plate 114 can fall onto the intermediate connection plate 116 and wait. Limiting baffles 117 for limiting the first feeding connection plate 114, the second feeding connection plate 115 and the intermediate connection plate 116 are symmetrically arranged on both side plates of the U-shaped bracket 111. Through the limiting baffles 117, the first feeding connection plate 114 and the second feeding connection plate 115 will not sway back and forth during the rising process, and stable transportation can be ensured.

[0042] During feeding, the front fork arm 6 falls onto the first feeding connection plate 114 through the feeding inclined frame 112; if the front fork arm 6 is tilted, it cannot fall onto the first feeding connection plate 114 until it can be horizontally placed on the first feeding connection plate 114, ensuring that the front fork arm 6 for conveying and feeding can be stably placed on the first feeding connection plate 114; the feeding push cylinder 113 can drive the first feeding connection plate 114 and the second feeding connection plate 115 to rise simultaneously. When pushing upward, the front fork arm 6 on the first feeding connection plate 114 falls onto the intermediate connection plate 116 to wait, and the front fork arm 6 on the second feeding connection plate 115 is conveyed to the front fork arm connection assembly 12; when the feeding push cylinder 113 drives the first feeding connection plate 114 and the second feeding connection plate 115 to descend, the front fork arm 6 on the intermediate connection plate 116 falls onto the second feeding connection plate 115 again, and the front fork arm 6 in the feeding inclined frame 112 falls onto the first feeding connection plate 114, cycling in sequence. In this way, the front fork arm 6 can be stably conveyed orderly, improving the stability and efficiency of conveying.

[0043] The front fork arm connection assembly 12 includes a connection cylinder 121, a connection rotating plate 122, a hinge fixing plate 123, a connection rotating cylinder 124, a front fork arm connection plate 125, and a front fork arm connection and conveying group; the connection cylinder 121 is inclined; the lower end of the connection cylinder 121 is hinged below the rear part of the U-shaped bracket 111; the upper end of the connection cylinder 121 is hinged to the lower part of the connection rotating plate 122, the connection rotating plate 122 is hinged to the hinge fixing plate 123, and the hinge fixing plate 123 is fixed above the rear part of the U-shaped bracket 111; the moving part of the connection cylinder 121 drives the connection rotating plate 122 to rotate upward. The connection rotating cylinder 124 is arranged on the connection rotating plate 122, the front fork arm connection plate 125 is arranged on the moving part of the connection rotating cylinder 124, and a connection groove 1251 for placing the front fork arm is arranged on the front fork arm connection plate 125. Through the connection groove 1251, it is convenient to place the front fork arm 6 better and can also limit the front fork arm 6 better. The front fork arm connection and conveying group is connected to the front fork arm connection plate 125, and the front fork arm connection and conveying group includes a front fork arm connection and conveying bracket 126 and a front fork arm connection and conveying plate 127; the front fork arm connection and conveying plate 127 is arranged on the front fork arm connection and conveying bracket 126, the front end of the front fork arm connection and conveying plate 127 is connected to the front fork arm connection plate 125, and the rear end of the front fork arm connection and conveying plate 127 is connected with an arc connection plate 128 for placing the arc opening of the front fork arm. Through the arc connection plate 128, a larger grasping space can be provided, facilitating the grasping by the front fork arm transfer mechanism.

[0044] During the transfer, when the second feeding connection plate 115 pushes the front fork arm 6 upward to the top, the connection rotating cylinder 124 drives the front fork arm connection plate 125 to rotate to a horizontal state, and the moving part of the connection cylinder 121 drives the connection rotating plate 122 to rotate upward, so that the front fork arm connection plate 125 is connected to the second feeding connection plate 115, enabling the front fork arm 6 on the second feeding connection plate 115 to slide down into the front fork arm connection plate 125. Then, the connection rotating cylinder 124 drives the front fork arm connection plate 125 to rotate to the front-rear direction, and the moving part of the connection cylinder 121 drives the connection rotating plate 122 to rotate downward, so that the front fork arm 6 falls along the front fork arm connection plate 125 onto the front fork arm connection and conveying plate 127, waiting to be grabbed by the front fork arm transfer mechanism.

[0045] As Figure 1 and Figure 2 shown, the front fork arm transfer mechanism includes a first front fork arm transfer component 13, a front fork arm positioning component 14, and a second front fork arm transfer component 15; the first front fork arm transfer component 13 and the second front fork arm transfer component 15 are respectively front fork arm transfer manipulators, and two clamping parts 16 are arranged on the front fork arm transfer manipulator. The two clamping parts 16 on the first front fork arm transfer component 13 can simultaneously grab and move two front fork arms 6 to the front fork arm positioning component 14, and after positioning, the two clamping parts 16 on the second front fork arm transfer component 15 grab and move the two front fork arms 6 to the front fork arm clamping device 2.

[0046] As Figure 4As shown in the figure, the front fork arm positioning assembly 14 includes a front fork arm positioning bracket 141, a first front fork arm positioning plate 142, a second front fork arm positioning plate 143, a front clamping and positioning electric cylinder 144, and a rear clamping and positioning cylinder 145; the front fork arm positioning bracket 141 is arranged on the frame; the first front fork arm positioning plate 142 and the second front fork arm positioning plate 143 are arranged in parallel front and back on the front fork arm positioning bracket 141; two front fork arm limiting grooves 1421 are arranged on both the first front fork arm positioning plate 142 and the second front fork arm positioning plate 143; through the two front fork arm limiting grooves 1421, it is convenient to place the two front fork arms 6 in the two front fork arm limiting grooves 1421, and the two front fork arms 6 can be limited in the front fork arm limiting grooves 1421. The front clamping and positioning electric cylinder 144 is arranged in the front and back direction on the frame and is located on the front side of the front fork arm positioning bracket 141, and a clamping and positioning frame 1441 is arranged on the moving part of the front clamping and positioning electric cylinder 144; two clamping and positioning blocks 1442 are arranged on the rear side surface of the clamping and positioning frame 1441, and the two front fork arms 6 are clamped backward by driving the two clamping and positioning blocks 1442 on the clamping and positioning frame 1441 through the front clamping and positioning electric cylinder 144. The rear clamping and positioning cylinder 145 is arranged in the front and back direction on the frame and is located on the rear side of the front fork arm positioning bracket 141; a clamping and positioning plate 1451 is connected to the front part of the rear clamping and positioning cylinder 145, and the two front fork arms 6 are clamped forward by driving the clamping and positioning plate 1451 through the rear clamping and positioning cylinder 145, so that the two front fork arms 6 can be accurately positioned on the front fork arm positioning bracket 141.

[0047] As Figure 5 and Figure 6 shown in the figure, the front fork arm clamping device 2 includes an upper die clamping mechanism 21 and a lower die clamping mechanism 22; the upper die clamping mechanism 21 includes a front fork arm clamping bracket 211, an upper die clamping oil cylinder 212, an upper die clamping and locking assembly, and an upper template group 214; the front fork arm clamping bracket 211 is arranged on the frame, the upper die clamping oil cylinder 212 is arranged on the top of the front fork arm clamping bracket 211, the moving part of the upper die clamping oil cylinder 212 passes through the front fork arm clamping bracket 211 and is connected to the upper die clamping and locking assembly, and the upper template group 214 is fixedly matched with the upper die clamping and locking assembly; the lower die clamping mechanism 22 includes a lower die clamping base 221, a lower template group 222, and a lower die clamping and locking assembly; the lower die clamping base 221 is arranged on the frame, the lower template group 222 is placed on the lower die clamping base 221; the lower die clamping and locking assembly is fixedly matched with the lower template group 222 and fixes the lower template group 222.

[0048] As Figure 6As shown in the figure, the upper die clamping and locking assembly includes an upper die connecting sleeve 2131, a first upper die clamping and locking cylinder 2132, and a second upper die clamping and locking cylinder 2133; the upper die connecting sleeve 2131 is connected to the moving part of the upper die clamping oil cylinder 212; a template fixing through hole 2134 for fixing the upper template is provided in the middle of the upper die connecting sleeve 2131, and through the template fixing through hole 2134, the top of the upper template group 214 can be inserted for locking and fixing. The first upper die clamping and locking cylinder 2132 and the second upper die clamping and locking cylinder 2133 are respectively arranged on the left and right sides of the upper die connecting sleeve 2131, and a clamping and locking block 2135 is connected to the moving parts of the first upper die clamping and locking cylinder 2132 and the second upper die clamping and locking cylinder 2133; the clamping and locking block 2135 enters the upper die connecting sleeve 2131 and communicates with the template fixing through hole 2134, and the top of the upper template group 214 is clamped and fixed by the inward clamping of the clamping and locking block 2135.

[0049] As Figure 7 and Figure 8 As shown in the figure, the lower die clamping base 221 includes a first lower die clamping support block, a second lower die clamping support block, and a third lower die clamping support block; two die-changing clamping and picking voids 2210 for die-changing are formed between the first lower die clamping support block, the second lower die clamping support block, and the third lower die clamping support block; lower die positioning protrusions 2211 are provided on both the first lower die clamping support block and the third lower die clamping support block, and through the cooperation of the lower die positioning protrusions 2211 with the lower template group 222, the lower template group 222 can be accurately installed on the first lower die clamping support block and the third lower die clamping support block. The lower die clamping and locking assembly includes two tightening and clamping cylinders 223; the two tightening and clamping cylinders 223 are respectively located on the left and right sides of the lower die clamping base 221; the left and right sides of the lower template group 222 are clamped and fixed by the rotation and lifting and clamping actions of the two tightening and clamping cylinders 223. A front fork arm support and auxiliary cylinder 23 is also provided on the front side of the lower die clamping mechanism 22, and a support and auxiliary plate 24 is horizontally arranged on the front fork arm support and auxiliary cylinder 23. By driving the support and auxiliary plate 24 to rise by the front fork arm support and auxiliary cylinder 23, a good support can be provided to prevent the two front fork arms 6 from falling before the two front fork arms 6 are transferred to the lower die clamping and locking and clamped and fixed.

[0050] As Figure 7 and Figure 8As shown in the figure, the upper template group 214 includes an upper die connector 2141, an upper die connecting plate 2142, and an upper template 2143. On the left and right sides of the upper die connector 2141, there are die-clamping grooves 2144 that cooperate with the die-clamping blocks 2135. The first upper die clamping cylinder 2132 and the second upper die clamping cylinder 2133 drive the die-clamping blocks 2135 to move inward, so that the two die-clamping blocks 2135 are clamped into the two die-clamping grooves 2144, thereby clamping and fixing the upper die connector 2141. The upper die connecting plate 2142 is connected to the bottom of the upper die connector 2141; the upper template 2143 is connected to the bottom of the upper die connecting plate 2142. In the middle of the bottom surface of the upper template 2143, there is an upper cutting groove 2145 for cutting. Through the upper cutting groove 2145, it is convenient for the arc cutting device 3 to be pulled backward, and the arc openings 61 of the two front fork arms 6 can be directly cut. On the left and right sides of the bottom surface of the upper template 2143, there are upper front fork arm cutting grooves 2146, and different front fork arm cutting grooves 2146 are formed according to the required cutting length, which is convenient for better matching with the two front fork arms 6. On the left and right sides of the bottom surface of the upper template 2143, there are template positioning holes 2147. The two template positioning holes 2147 are respectively located outside the two front fork arm cutting grooves 2146. Through the two template positioning holes 2147, it is convenient to better position with the lower template group 222, and the alignment degree during coincidence can be further ensured.

[0051] The lower template group 222 includes a lower die support plate 2221 and a lower template 2222. On the left and right sides of the bottom surface of the lower die support plate 2221, there are lower template grooves 2223 that cooperate with the lower die positioning protrusions 2211. Through the lower template grooves 2223, the lower die support plate 2221 can be stably installed on the lower die clamping base 221. On the left and right sides of the bottom surface of the lower die support plate 2221, there are die-changing positioning holes 2220 for die-changing. And the two die-changing positioning holes 2220 are located at the two die-changing clamping gaps 2210. Through the die-changing positioning holes 2220, it can better cooperate with the die-changing device 5, which is convenient for the die-changing device 5 to clamp more precisely and better ensures the stability during the transfer process. The lower template 2222 is connected to the top surface of the lower die support plate 2221. In the middle of the top surface of the lower template 2222, there is a lower cutting groove 2224 for cutting. The lower cutting groove 2224 and the upper cutting groove 2145 cooperate to form a template cutting through hole, which is convenient for the arc cutting device 3 to cut. On the left and right sides of the top surface of the lower template 2222, there are lower front fork arm cutting grooves 2225. The lower front fork arm cutting grooves 2225 and the upper front fork arm cutting grooves 2146 cooperate to form front fork arm holes, thereby facilitating the clamping and fixing of the two front fork arms 6. On the left and right sides of the top surface of the lower template 2222, there are template positioning protrusions 2226. The template positioning protrusions 2226 and the template positioning holes 2147 cooperate for positioning, which is convenient for the upper template 2143 and the lower template 2222 to be aligned and fitted, and further ensures the clamping accuracy.

[0052] When clamping, by transferring the two front fork arms 6 to the lower front fork arm cutting grooves 2225 of the lower template 2222, the upper die clamping cylinder 212 drives the upper die clamping assembly to move downward, so that the upper template 2143 and the lower template 2222 are clamped and fitted together, thereby limiting the two front fork arms 6 in the front fork arm holes. When the template needs to be replaced, the first upper die clamping cylinder 2132 and the second upper die clamping cylinder 2133 drive the clamping block 2135 to move outward, so that the upper template group 214 is placed on the lower template group 222. By rotating the two tightening clamping cylinders 223 outward, the lower template group 222 is in an unlocked state, so that the upper template group 214 and the lower template group 222 can be removed. Replace with a new set of upper template group 214 and lower template group 222 and place them on the lower die support plate 2221. The first upper die clamping cylinder 2132 and the second upper die clamping cylinder 2133 drive the clamping block 2135 to move inward to clamp and fix the upper template group 214. By rotating the two tightening clamping cylinders 223 inward, the lower template group 222 is fixed on the lower die support plate 2221, thus realizing template replacement.

[0053] Such as Figure 9As shown in the figure, the arc cutting device 3 includes an arc cutting support 31, an arc cutting driving oil cylinder 32, and a cutting assembly 33. The arc cutting support 31 is arranged at the rear of the front fork arm clamping device 2. The arc cutting driving oil cylinder 32 is arranged in the front-back direction at the rear of the arc cutting support 31. The front end of the arc cutting driving oil cylinder 32 passes through the arc cutting support 31 and is connected to the cutting assembly 33. The cutting assembly 33 includes a cutting connecting rod 331, a first cutting knife 332, and a second cutting knife 333. The rear end of the cutting connecting rod 331 is fixedly connected to the front end of the arc cutting driving oil cylinder 32 through an oil cylinder connecting sleeve 321. The first cutting knife 332 and the second cutting knife 333 are respectively arranged on both sides of the front end of the cutting connecting rod 331. The cross-section of the cutting connecting rod 331 is in a T shape, which facilitates the installation of the first cutting knife 332 and the second cutting knife 333 and enables simultaneous cutting. The first cutting knife 332 and the second cutting knife 333 are respectively arranged on both sides of the short board 3311 of the cutting connecting rod. The first cutting knife 332 and the second cutting knife 333 can simultaneously cut the two front fork arms 6, further improving the cutting efficiency. The first cutting knife 332 and the second cutting knife 333 are symmetrically arranged and have the same structure. A cutting inclined surface 3321 is arranged at the rear end of the first cutting knife 332, which can further ensure the cutting accuracy and cutting quality. A cutting limit plate 34 is arranged below the cutting connecting rod 331 on the machine frame. A limiting U-shaped notch 341 that cooperates with the cutting connecting rod 331 is arranged on the cutting limit plate 34, which can ensure the accuracy of the cutting connecting rod 331 during movement and prevent the cutting connecting rod 331 from moving and deviating.

[0054] During cutting, before the two front fork arms 6 are placed in front of the lower template group 222, the first cutting knife 332 and the second cutting knife 333 on the cutting connecting rod 331 are first driven by the arc cutting driving oil cylinder 32 to move forward, so that the first cutting knife 332 and the second cutting knife 333 are located on the front side of the arc openings 61 of the two front fork arms 6. After the two front fork arms 6 are clamped and fixed, the first cutting knife 332 and the second cutting knife 333 on the cutting connecting rod 331 are driven by the arc cutting driving oil cylinder 32 to pull backward, thereby cutting the arc openings 61 of the two front fork arms 6, and enabling the two cut waste materials to fall through the through holes of the machine frame for recycling and treatment.

[0055] As Figure 10 and Figure 11As shown, the die change device 5 includes a template storage rack 51 and a template clamping and transfer mechanism 52; the template storage rack 51 is arranged on the machine frame, and a plurality of template placement stations for placing templates are arranged on the template storage rack 51; the template clamping and transfer mechanism 52 includes a die change horizontal movement component 521, a die change lifting movement component 522 and a die change grasping component 523; the die change lifting movement component 522 is arranged on the moving part of the die change horizontal movement component 521, and the template grasping component 523 is arranged on the moving part of the die change lifting movement component 522. The template grasping component 523 clamps and transfers the template on the template storage rack 51 through horizontal lifting and positioning.

[0056] In the middle of the template storage rack 51, a longitudinal intermediate baffle 511 is provided, and two storage areas 510 are formed by the intermediate baffle 511; U-shaped template storage plates 512 for storing templates are arranged on the upper and lower sides of each storage area 510. The openings of the U-shaped template storage plates 512 face forward. Through the U-shaped template storage plates 512, it is convenient for the template grasping component 523 to take, place and transfer. On the left and right sides of each U-shaped template storage plate 512, template storage positioning bosses 513 are arranged. Through the template storage positioning bosses 513, it is convenient to match with the lower template groove 2223, so that the template can be accurately placed on the U-shaped template storage plate 512.

[0057] The die change horizontal movement component 521 includes a die change horizontal movement bracket 5211 and a die change horizontal movement electric cylinder 5212; the die change horizontal movement bracket 5211 is arranged on the machine frame, and the die change horizontal movement electric cylinder 5212 is arranged on the die change horizontal movement bracket 5211. The die change lifting movement component 522 includes a die change lifting movement bracket 5221 and a die change lifting movement electric cylinder 5222; the die change lifting movement bracket 5221 is arranged on the moving plate of the die change horizontal movement electric cylinder 5212, and the die change lifting movement electric cylinder 5222 is longitudinally arranged on the die change lifting movement bracket 5221.

[0058] As Figure 11As shown, the template grabbing component 523 includes a template grabbing frame 5231, a template grabbing cylinder 5232, and a template grabbing cylinder connecting plate 5233. The template grabbing frame 5231 is arranged on the moving plate of the die-changing lifting and moving electric cylinder 5222. The template grabbing cylinder 5232 is arranged at the bottom of the template grabbing frame 5231. The middle of the template grabbing cylinder connecting plate 5233 is connected to the moving part of the template grabbing cylinder 5232, and both ends of the template grabbing cylinder connecting plate 5233 are connected to the template grabbing rods 5234. The two connecting template grabbing rods 5234 on the template grabbing cylinder connecting plate 5233 are driven by the template grabbing cylinder 5232 to move forward and backward for positioning. The top of the template grabbing rod 5234 is connected to the template grabbing slide bar 5235. The template grabbing slide bar 5235 is slidably connected to the bottom of the template grabbing frame 5231 through the template grabbing slider 5236. Through the cooperation between the template grabbing slider 5236 and the template grabbing slide bar 5235, the smoothness during the lifting and moving process is facilitated. A grabbing positioning convex block 5237 that cooperates with the bottom of the template is arranged at the rear end of the template grabbing rod 5234. Through the cooperation between the grabbing positioning convex block 5237 and the die-changing positioning hole 2220, it is convenient for the template grabbing rod 5234 to stably pick up the template and perform precise transfer, improving the picking efficiency and replacement efficiency during the die-changing process.

[0059] During die-changing, templates of multiple models are placed on each U-shaped template holding plate 512. The template grabbing component 523 is driven by the cooperation of the die-changing horizontal moving electric cylinder 5212 and the die-changing lifting and moving electric cylinder 5222 to move to the position corresponding to the specified template. The two connecting template grabbing rods 5234 are driven by the template grabbing cylinder 5232 to move to the opening of the U-shaped template holding plate 512, aligning the grabbing positioning convex block 5237 with the die-changing positioning hole 2220 of the template, lifting the template, and transferring it to the front fork arm clamping device 2 for replacement.

[0060] A usage method of a bicycle front fork arm arc cutting device, which is realized by a bicycle front fork arm arc cutting device; successively through the following steps:

[0061] (1) Feeding of the front fork arm: Pour the front fork arm parts into the first front fork arm feeding mechanism and the second front fork arm feeding mechanism; transfer the front fork arms on the first front fork arm feeding mechanism and the second front fork arm feeding mechanism to the front fork arm positioning component 14 for positioning through the first front fork arm transfer component 13 on the front fork arm transfer mechanism; transfer the two front fork arms to the front fork arm clamping device 2 through the second front fork arm transfer component 15;

[0062] (2) Positioning and clamping of the front fork arm: Clamp and fix the two front fork arms through the upper die clamping mechanism 21 and the lower die clamping mechanism 22 on the front fork arm clamping device 2;

[0063] (III) Front fork arm cutting and forming: Pull backward through the arc cutting device 3 to cut the arc openings of the two clamped front fork arms;

[0064] (IV) Front fork arm conveying and discharging: Convey and discharge the two cut front fork arms through the material taking device 4 by means of the material taking manipulator;

[0065] (V) Front fork arm die replacement: When changing to another model, transfer the template of the front fork arm clamping device 2 to the template storage rack 51 through the template clamping and transfer mechanism 52 on the die changing device 5, and then clamp a new template from the template storage rack 51 and install it on the front fork arm clamping device 2.

[0066] In summary, the advantages of the present invention are that it realizes full-automatic cutting, eliminates manual operation, saves time and effort, and further improves the cutting efficiency and cutting quality of the arc openings of the bicycle front fork arms.

Claims

1. A cutting device for the arc-shaped opening of a bicycle front fork arm, characterized in that, The device includes a frame and a feeding transfer device (1), a front fork arm clamping device (2), an arc cutting device (3), a material taking device (4) and a die changing device (5) arranged thereon; the feeding transfer device (1) includes a first front fork arm feeding mechanism, a second front fork arm feeding mechanism and a front fork arm transfer mechanism; the first front fork arm feeding mechanism and the second front fork arm feeding mechanism are respectively used for conveying the front fork arms to the front fork arm transfer mechanism, and the front fork arm transfer mechanism is used for transferring the two front fork arms to the front fork arm clamping device (2), and the front fork arm clamping device (2) is used for clamping and fixing the two front fork arms; the arc cutting device (3) is used for cutting the two clamped front fork arms; the material taking device (4) is used for conveying the two cut front fork arms out of the device; the die changing device (5) is used for replacing the die on the front fork arm clamping device (2). The front fork arm clamping device (2) includes an upper die clamping mechanism (21) and a lower die clamping mechanism (22); the upper die clamping mechanism (21) includes a front fork arm clamping bracket (211), an upper die clamping oil cylinder (212), an upper die locking module and an upper template group (214); the front fork arm clamping bracket (211) is arranged on the frame, the upper die clamping oil cylinder (212) is arranged at the top of the front fork arm clamping bracket (211), the moving part of the upper die clamping oil cylinder (212) passes through the front fork arm clamping bracket (211) and is connected with the upper die locking module, and the upper template group (214) is fixedly matched with the upper die locking module; the lower die clamping mechanism (22) includes a lower die clamping base (221), a lower template group (222) and a lower die locking module; the lower die clamping base (221) is arranged on the frame, the lower template group (222) is placed on the lower die clamping base (221); the lower die locking module is fixedly matched with the lower template group (222) and fixes the lower template group (222). The described arc cutting device (3) includes an arc cutting support (31), an arc cutting driving oil cylinder (32), and a cutting assembly (33); the arc cutting support (31) is arranged at the rear of the front fork arm clamping device (2), and the arc cutting driving oil cylinder (32) is arranged in the front-rear direction at the rear of the arc cutting support (31); the front end of the arc cutting driving oil cylinder (32) passes through the arc cutting support (31) and is connected to the cutting assembly (33), and the cutting assembly (33) includes a cutting connecting rod (331), a first cutting knife (332), and a second cutting knife (333); the rear end of the cutting connecting rod (331) is fixedly connected to the front end of the arc cutting driving oil cylinder (32) through an oil cylinder connecting sleeve (321), and the first cutting knife (332) and the second cutting knife (333) are respectively arranged on both sides of the front end of the cutting connecting rod (331); the cross section of the cutting connecting rod (331) is in a T shape, and the first cutting knife (332) and the second cutting knife (333) are respectively arranged on both sides of the short plate (3311) of the cutting connecting rod; the first cutting knife (332) and the second cutting knife (333) are symmetrically arranged and have the same structure, and a cutting inclined surface (3321) is arranged at the rear end of the first cutting knife (332); a cutting limit plate (34) is arranged on the frame below the cutting connecting rod (331); and a limiting U-shaped notch (341) matching the cutting connecting rod (331) is arranged on the cutting limit plate (34).

2. The arc-notch cutting device for a bicycle front fork arm according to claim 1, characterized in that, The described first front fork arm feeding mechanism and the second front fork arm feeding mechanism are symmetrically arranged and have the same structure; the first front fork arm feeding mechanism includes a front fork arm feeding component (11) and a front fork arm connection component (12); the front fork arm feeding component (11) includes a U-shaped bracket (111), a feeding inclined frame (112), a feeding pushing cylinder (113), a first feeding connection plate (114), a second feeding connection plate (115), and an intermediate connection plate (116); the U-shaped bracket (111) is arranged on the frame, and the opening of the U-shaped bracket (111) faces forward; the feeding inclined frame (112) is arranged at the front of the U-shaped bracket (111), and the feeding inclined frame (112) is inclined backward and downward; the feeding pushing cylinder (113) is longitudinally arranged on the frame and is located between the feeding inclined frame (112) and the U-shaped bracket (111); the top of the feeding pushing cylinder (113) is connected with a pushing plate (1131) arranged in the front-rear direction; the front part of the pushing plate (1131) is fixedly connected with the first feeding connection plate (114), the rear part of the pushing plate (1131) is fixedly connected with the second feeding connection plate (115), and the first feeding connection plate (114) and the second feeding connection plate (115) are respectively located inside the opening of the U-shaped bracket (111); the tops of the first feeding connection plate (114) and the second feeding connection plate (115) are both provided with inclined surfaces (1141) inclined backward and downward, and a pushing baffle (1142) is arranged at the front part of the inclined surface (1141); the intermediate connection plate (116) is fixedly arranged on the U-shaped bracket (111) and is located between the first feeding connection plate (114) and the second feeding connection plate (115); the top of the intermediate connection plate (116) is provided with an inclined connection surface (1161) inclined backward and downward; limiting baffles (117) for limiting the first feeding connection plate (114), the second feeding connection plate (115), and the intermediate connection plate (116) are symmetrically arranged on both side plates of the U-shaped bracket (111).

3. A cutting device for the arc opening of a bicycle front fork arm according to claim 2, characterized in that, The described front fork arm connection assembly (12) includes a connection cylinder (121), a connection rotating plate (122), a hinge fixed plate (123), a connection rotating cylinder (124), a front fork arm connection plate (125) and a front fork arm connection conveying group; the connection cylinder (121) is inclined; the lower end of the connection cylinder (121) is hinged below the rear part of the U-shaped bracket (111); the upper end of the connection cylinder (121) is hinged to the lower part of the connection rotating plate (122), the connection rotating plate (122) is hinged to the hinge fixed plate (123), and the hinge fixed plate (123) is fixed above the rear part of the U-shaped bracket (111); the connection rotating cylinder (124) is arranged on the connection rotating plate (122), the front fork arm connection plate (125) is arranged on the moving part of the connection rotating cylinder (124), and a connection groove (1251) for placing the front fork arm is arranged on the front fork arm connection plate (125); the front fork arm connection conveying group is connected to the front fork arm connection plate (125); the front fork arm connection conveying group includes a front fork arm connection conveying bracket (126) and a front fork arm connection conveying plate (127); the front fork arm connection conveying plate (127) is arranged on the front fork arm connection conveying bracket (126), the front end of the front fork arm connection conveying plate (127) is connected to the front fork arm connection plate (125), and the rear end of the front fork arm connection conveying plate (127) is connected with an arc connection plate (128) for placing the arc opening of the front fork arm.

4. A bicycle front fork arm arc cutting device according to claim 3, characterized in that The described front fork arm transfer mechanism includes a first front fork arm transfer component (13), a front fork arm positioning component (14) and a second front fork arm transfer component (15); the first front fork arm transfer component (13) and the second front fork arm transfer component (15) are respectively front fork arm transfer manipulators, and two clamping parts (16) are arranged on the front fork arm transfer manipulator; the front fork arm positioning component (14) includes a front fork arm positioning bracket (141), a first front fork arm positioning plate (142), a second front fork arm positioning plate (143), a front clamping and positioning electric cylinder (144) and a rear clamping and positioning cylinder (145); the front fork arm positioning bracket (141) is arranged on the frame; the first front fork arm positioning plate (142) and the second front fork arm positioning plate (143) are arranged in parallel front and back on the front fork arm positioning bracket (141); two front fork arm limiting grooves (1421) are arranged on both the first front fork arm positioning plate (142) and the second front fork arm positioning plate (143); the front clamping and positioning electric cylinder (144) is arranged in the front and back direction on the frame and is located on the front side of the front fork arm positioning bracket (141), and a clamping and positioning frame (1441) is arranged on the moving part of the front clamping and positioning electric cylinder (144); two clamping and positioning blocks (1442) are arranged on the rear side surface of the clamping and positioning frame (1441); the rear clamping and positioning cylinder (145) is arranged in the front and back direction on the frame and is located on the rear side of the front fork arm positioning bracket (141); a clamping and positioning plate (1451) is connected to the front part of the rear clamping and positioning cylinder (145).

5. A cutting device for the arc-shaped opening of a bicycle front fork arm according to claim 4, characterized in that The upper die clamping and locking assembly described above includes an upper die connecting sleeve (2131), a first upper die clamping and locking cylinder (2132), and a second upper die clamping and locking cylinder (2133); the upper die connecting sleeve (2131) is connected to the moving part of the upper die clamping oil cylinder (212); a template fixing through hole (2134) for fixing the upper template is provided in the middle of the upper die connecting sleeve (2131); the first upper die clamping and locking cylinder (2132) and the second upper die clamping and locking cylinder (2133) are respectively arranged on the left and right sides of the upper die connecting sleeve (2131), and a clamping and locking block (2135) is connected to the moving parts of the first upper die clamping and locking cylinder (2132) and the second upper die clamping and locking cylinder (2133); the clamping and locking block (2135) enters into the upper die connecting sleeve (2131) and communicates with the template fixing through hole (2134); the lower die clamping base (221) includes a first lower die clamping support block, a second lower die clamping support block, and a third lower die clamping support block; two die-changing clamping and picking voids (2210) for die changing are formed between the first lower die clamping support block, the second lower die clamping support block, and the third lower die clamping support block; lower die positioning protrusions (2211) are provided on both the first lower die clamping support block and the third lower die clamping support block; the lower die clamping and locking assembly includes two tightening and clamping cylinders (223); the two tightening and clamping cylinders (223) are respectively located on the left and right sides of the lower die clamping base (221); a front fork arm support auxiliary cylinder (23) is further provided on the front side of the lower die clamping mechanism (22), and a support auxiliary plate (24) is horizontally arranged on the front fork arm support auxiliary cylinder (23).

6. A cutting device for the arc-shaped opening of a bicycle front fork arm according to claim 5, characterized in that, The upper template group (214) described above includes an upper die connector (2141), an upper die connecting plate (2142), and an upper template (2143); on the left and right sides of the upper die connector (2141), there are provided die-clamping grooves (2144) that cooperate with the die-clamping blocks (2135); the upper die connecting plate (2142) is connected to the bottom of the upper die connector (2141); the upper template (2143) is connected to the bottom of the upper die connecting plate (2142); in the middle of the bottom surface of the upper template (2143), there is provided an upper cutting groove (2145) for cutting, and on the left and right sides of the bottom surface of the upper template (2143), there are provided upper front fork arm cutting type grooves (2146); on the left and right sides of the bottom surface of the upper template (2143), there are provided template positioning holes (2147); the two template positioning holes (2147) on both sides are respectively located outside the two front fork arm cutting type grooves (2146); the lower template group (222) includes a lower die support plate (2221) and a lower template (2222); on the left and right sides of the bottom surface of the lower die support plate (2221), there are provided lower template grooves (2223) that cooperate with the lower die positioning protrusions (2211); on the left and right sides of the bottom surface of the lower die support plate (2221), there are provided die-changing positioning holes (2220) for die-changing; and the two die-changing positioning holes (2220) are located at the two die-changing clamping voids (2210); the lower template (2222) is connected to the top surface of the lower die support plate (2221); in the middle of the top surface of the lower template (2222), there is provided a lower cutting groove (2224) for cutting; the lower cutting groove (2224) cooperates with the upper cutting groove (2145) to form a template cutting through-hole; on the left and right sides of the top surface of the lower template (2222), there are provided lower front fork arm cutting type grooves (2225); the lower front fork arm cutting type grooves (2225) cooperate with the upper front fork arm cutting type grooves (2146) to form front fork arm type holes; on the left and right sides of the top surface of the lower template (2222), there are provided template positioning protrusions (2226); the template positioning protrusions (2226) cooperate with the template positioning holes (2147) for positioning.

7. A cutting device for the arc-shaped opening of a bicycle front fork arm according to claim 6, characterized in that The described die-changing device (5) includes a template storage rack (51) and a template clamping and transfer mechanism (52); the template storage rack (51) is arranged on the machine frame, and a plurality of template placement stations for placing templates are arranged on the template storage rack (51); a longitudinal intermediate baffle (511) is arranged in the middle of the template storage rack (51), and two storage areas (510) are formed by the intermediate baffle (511); U-shaped template storage plates (512) for storing templates are arranged on the upper and lower sides of each storage area (510); template storage positioning protrusions (513) are arranged on the left and right sides of each U-shaped template storage plate (512); the template clamping and transfer mechanism (52) includes a die-changing horizontal movement assembly (521), a die-changing vertical movement assembly (522) and a template grabbing assembly (523); the die-changing vertical movement assembly (522) is arranged on the moving part of the die-changing horizontal movement assembly (521), and the template grabbing assembly (523) is arranged on the moving part of the die-changing vertical movement assembly (522), and the template grabbing assembly (523) clamps and transfers the templates on the template storage rack (51) through horizontal lifting and positioning; the die-changing horizontal movement assembly (521) includes a die-changing horizontal movement bracket (5211) and a die-changing horizontal movement electric cylinder (5212); the die-changing horizontal movement bracket (5211) is arranged on the machine frame, and the die-changing horizontal movement electric cylinder (5212) is arranged on the die-changing horizontal movement bracket (5211), the die-changing vertical movement assembly (522) includes a die-changing vertical movement bracket (5221) and a die-changing vertical movement electric cylinder (5222); the die-changing vertical movement bracket (5221) is arranged on the moving plate of the die-changing horizontal movement electric cylinder (5212), and the die-changing vertical movement electric cylinder (5222) is longitudinally arranged on the die-changing vertical movement bracket (5221); the template grabbing assembly (523) includes a template grabbing frame (5231), a template grabbing cylinder (5232), and a template grabbing cylinder connecting plate (5233); the template grabbing frame (5231) is arranged on the moving plate of the die-changing vertical movement electric cylinder (5222), the template grabbing cylinder (5232) is arranged at the bottom of the template grabbing frame (5231), the middle of the template grabbing cylinder connecting plate (5233) is connected to the moving part of the template grabbing cylinder (5232), and both ends of the template grabbing cylinder connecting plate (5233) are connected to template grabbing rods (5234); the top of the template grabbing rod (5234) is connected to a template grabbing slide rod (5235); the template grabbing slide rod (5235) is slidably connected to the bottom of the template grabbing frame (5231) through a template grabbing slider (5236); a grabbing positioning protrusion (5237) matching the bottom of the template is arranged at the rear end of the template grabbing rod (5234).

8. A method for cutting an arc-shaped opening of a bicycle front fork arm, characterized in that, This method is implemented by a bicycle front fork arm arc cutting device as described in claim 7; successively through the following steps: Front fork arm feeding: Pour the front fork arm parts into the first front fork arm feeding mechanism and the second front fork arm feeding mechanism; use the first front fork arm transfer component (13) on the front fork arm transfer mechanism to transfer the front fork arms on the first front fork arm feeding mechanism and the second front fork arm feeding mechanism to the front fork arm positioning component (14) for positioning; use the second front fork arm transfer component (15) to transfer the two front fork arms to the front fork arm clamping device (2); Front fork arm positioning and clamping: Use the upper die clamping mechanism (21) and the lower die clamping mechanism (22) on the front fork arm clamping device (2) to clamp and fix the two front fork arms; Front fork arm cutting and forming: Pull backward through the arc cutting device (3) to cut the arc openings of the two clamped front fork arms; Front fork arm discharging: Use the picking device (4) to convey the two cut front fork arms out through the picking manipulator; Front fork arm die replacement: When changing to another model, use the template clamping and transfer mechanism (52) on the die changing device (5) to transfer the template of the front fork arm clamping device (2) to the template storage rack (51), and then clamp a new template from the template storage rack (51) and install it on the front fork arm clamping device (2).

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