Positioning fixture based on chain wheel machining and using method

Abstract

The application relates to the technical field of chain wheel machining, and discloses a positioning clamp for chain wheel machining and a use method, which comprises a machining table, a placing table rotationally connected in the machining table, a moving platform, a cutting tool arranged at the top of the machining table, a clamping assembly arranged at the top of the placing table, and a calibration assembly arranged in the placing table. Through cooperation of the clamping assembly and the calibration assembly, the first cylinder drives the push plate to move through the first telescopic rod, the push rod drives the push disc to move in the air cylinder, air in the air cylinder is continuously delivered into the push cylinder through the air inlet pipe, the sealing disc drives the push rack to move, the driving rod is driven to rotate through the driving gear, the driving rod drives the elastic ropes to contract through the storage wheel, the two elastic ropes are in the straightened state, a center point is formed at the intersection of the two elastic ropes, and the center determination effect is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the chain wheel machining technical field, in particular to a positioning clamp for chain wheel machining and a use method. BACKGROUND

[0002] The chain wheel is a wheel with embedded tooth type chain tooth, which is used to be engaged with the block with accurate pitch on the chain ring or cable. The chain wheel is widely used in mechanical transmission of chemical industry, textile machinery, escalator, wood processing, stereo parking garage, agricultural machinery, food processing, instrument, petroleum and other industries, so that when the chain wheel is machined, a numerical control machining center is usually used to fix and machine the chain wheel, so as to guarantee the accuracy of chain wheel machining.

[0003] The positioning clamp for chain wheel machining disclosed by the publication No. CN212096048U comprises a workbench and a sliding groove, five sliding grooves are arranged on the workbench, a tooling is arranged on the top of the workbench, a first C-shaped groove is arranged on one side of the tooling, a second C-shaped groove is arranged on the side of the tooling away from the first C-shaped groove, a fixing mechanism is arranged on the side of the first C-shaped groove and the second C-shaped groove away from the tooling, a square groove is arranged on the top of the tooling, a circular groove is arranged on the bottom of the square groove, a blank is arranged on the top of the square groove, six first pressing plates are arranged on the top of the blank, and second pads are arranged on the bottom of the first pressing plates away from the blank.

[0004] Although the above application and the prior art can avoid the need for repeated positioning of the chain wheel during machining, when the outer circle and the inner hole of the chain wheel are simultaneously roughly machined in the above application and the prior art, the center point of the chain wheel will be offset when the outer circle of the other end of the chain wheel is roughly machined, thereby affecting the subsequent normal use of the chain wheel, and when the center point of the chain wheel is positioned, if the width of the outer circle of the chain wheel is greater than the width of the inner hole, the center point of the chain wheel will not be marked, thereby affecting the subsequent machining, and when the center point of the chain wheel is marked, since uninterrupted use is required, the mark will gradually become shallow, thereby affecting the subsequent operation, therefore the application provides a positioning clamp for chain wheel machining and a use method. SUMMARY

[0005] In view of the defects of the prior art, the positioning clamp for chain wheel machining and the use method have the advantages of center determination, convenient marking and prevention of shallowing, solve the problems that when the outer circle and the inner hole of the chain wheel are synchronously roughly machined, the center point of the chain wheel is offset when the outer circle of the other end of the chain wheel is roughly machined, thereby affecting the subsequent normal use of the chain wheel, and when the center point of the chain wheel is positioned, if the width of the outer circle of the chain wheel is greater than the width of the inner hole, the center point of the chain wheel cannot be marked, thereby affecting the subsequent machining, and when the center point of the chain wheel is marked, the mark is gradually shallowed due to uninterrupted use, thereby affecting the subsequent operation.

[0006] To achieve the above-mentioned center determination, convenient marking and prevention of shallowing, the present application provides the following technical scheme: a positioning clamp for chain wheel machining, comprising: a machining table, and a placement table rotatably connected inside the machining table,

[0007] A moving platform is arranged on the top of the machining table, and a cutting tool is arranged on the bottom of the moving platform.

[0008] A clamping assembly is arranged on the top of the placement table and is used for positioning the chain wheel for subsequent machining.

[0009] A calibration assembly is arranged inside the placement table and is used for confirming the center of the chain wheel to be machined.

[0010] A marking assembly is arranged inside the placement table and is used for preventing the center points of the two ends of the chain wheel from being offset.

[0011] A liquid supplementing assembly is arranged inside the placement table and is used for preventing the raw material from being not supplemented for a long time use of the marking assembly, thereby making the marking effect not obvious.

[0012] Further, the clamping assembly further comprises a first cylinder fixedly connected inside the placement table, a first telescopic rod differentially connected to the output end of the first cylinder, and a pushing rod rotatably connected to the end of the first telescopic rod away from the first cylinder.

[0013] Further, the clamping assembly further comprises a rotating frame rotatably connected inside the placement table, a connecting strip rotatably connected to the bottom of the sliding table at the four corners of the bottom of the rotating frame.

[0014] Further, the calibration assembly comprises a push plate fixedly connected to the surface of the first telescopic rod and a gas conveying cylinder fixedly connected to the inside of the placing table, the surface of the push plate is fixedly connected with a push rod, one end of the push rod away from the push plate is fixedly connected with a push disc, and the push disc is slidingly connected to the inside of the gas conveying cylinder.

[0015] Further, the calibration assembly further comprises a pushing cylinder fixedly connected to the inside of the placing table and a driving rod rotationally connected to the inside of the placing table, the gas conveying cylinder and the pushing cylinder are communicated through a gas inlet pipe, the inside of the pushing cylinder is slidingly connected with a sealing disc, one end of the sealing disc is fixedly connected with a pushing rack gear, and the inside of the pushing cylinder is fixedly connected with an over rod.

[0016] Further, the surface of the driving rod is fixedly connected with a driving gear and a storage wheel, the driving gear is in meshing transmission with the pushing rack gear, the surface of the storage wheel is provided with an elastic rope, one end of the elastic rope away from the storage wheel is fixedly connected to the top of the placing table, and the surface of the elastic rope is fixedly connected with a half-ring iron sheet.

[0017] Further, the marking assembly comprises a second air cylinder fixedly connected to the inside of the placing table, the output end of the second air cylinder is differentially connected with a second telescopic rod, the top of the second telescopic rod is fixedly connected with a magnetic force disc, the top of the magnetic force disc is provided with a placing groove, and the shape of the placing groove is matched with the shape of the elastic rope.

[0018] Further, the liquid supplement assembly comprises an extrusion plate fixedly connected to the surface of the second telescopic rod and a liquid cylinder fixedly connected to the inside of the placing table, the bottom of the extrusion plate is fixedly connected with an extrusion rod, the bottom of the extrusion rod is fixedly connected with an extrusion disc, the extrusion disc is slidingly connected to the inside of the liquid cylinder, the surface of the liquid cylinder is fixedly connected with a liquid outlet pipe, and one end of the liquid outlet pipe is fixedly connected with a spray head.

[0019] Further, the surface of the processing table is provided with a control panel, the top of the processing table is provided with an audible and visual warning light, and the control panel is electrically connected with the first air cylinder, the second air cylinder and the audible and visual warning light.

[0020] The application further provides a positioning method for chain wheel machining, which specifically comprises the following steps:

[0021] Step 1, placing the chain wheel to be machined in the inside of the placing table, and positioning and fixing the outer surface of the chain wheel to be machined through the clamping assembly;

[0022] Step 2, when the clamping assembly is operating, the clamping assembly synchronously drives the calibration assembly to determine the center point of the chain wheel to be machined by the calibration assembly;

[0023] Step 3, start the marking assembly, so that the marking assembly marks the center point confirmed by the calibration assembly, and then the center point of the chain wheel is marked;

[0024] Step 4, when the marking assembly is operating, the marking assembly synchronously drives the liquid supplementing assembly, so that the liquid supplementing assembly supplements the marking liquid used by the calibration assembly;

[0025] Step 5, after the operation of step 4 is completed, the chain wheel is turned over and placed, and then the outer circle and the inner hole of the chain wheel are rough machined by the cutting tool.

[0026] Compared with the prior art, the present application provides a positioning clamp and use method for chain wheel machining, which has the following beneficial effects:

[0027] 1、The positioning clamp and use method for chain wheel machining, by the cooperation of the clamping assembly and the calibration assembly, the first air cylinder is started, the first air cylinder drives the push plate to move through the first telescopic rod, the push rod drives the push disc to move in the inside of the air cylinder, and then the air in the inside of the air cylinder is continuously delivered to the inside of the push cylinder through the air inlet pipe, the sealing disc drives the push rack to move, and then the driving rod is driven to rotate through the driving gear, the driving rod drives the elastic rope to contract through the storage wheel, when the sealing disc contacts the excessive rod, the two elastic ropes are in the straight state, the intersection of the two elastic ropes forms the center point, and the center determination effect is achieved.

[0028] 2、The positioning clamp and use method for chain wheel machining, by the cooperation of the calibration assembly and the marking assembly, when the two elastic ropes are in the straight state, the second air cylinder is started, the second air cylinder drives the magnetic disc to rise through the second telescopic rod, the two elastic ropes enter the inside of the placing groove, and then the magnetic disc adsorbs the two elastic ropes through the half-ring iron sheet, and then the second telescopic rod is retracted through the second air cylinder, the magnetic disc drives the elastic rope to retract through the half-ring iron sheet, as the magnetic disc continuously descends, the elastic rope is gradually stretched, when the magnetic disc is separated from the half-ring iron sheet, the elastic rope quickly retracts, the marking pigment on the surface of the elastic rope is bounced on the surface of the chain wheel to be machined, and the convenient marking effect is achieved.

[0029] 3、The positioning clamp and use method for chain wheel machining, by the cooperation of the marking assembly and the liquid supplementing assembly, when the second telescopic rod descends, the second telescopic rod drives the extrusion rod to descend through the extrusion plate, the extrusion rod drives the extrusion disc to move in the inside of the liquid cylinder, and then the pigment in the inside of the liquid cylinder enters the inside of the nozzle through the liquid outlet pipe, and then the pigment is transferred to the surface of the elastic rope through the nozzle, as the elastic rope is in the inclined state in the descending process, the pigment can flow to the middle part of the elastic rope, and then the pigment on the surface of the elastic rope is supplemented, and the effect of preventing the color from becoming lighter is achieved.

[0030] Additional features and advantages of the present application will be set forth in the description that follows, and in part will be apparent from the description, or can be learned by practice of the application. The objectives and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a perspective view of the present application;

[0032] Figure 2 is a perspective view of the processing station of the present application;

[0033] Figure 3 is a perspective view of the placement station of the present application;

[0034] Figure 4 is a perspective view of the placement station of the present application;

[0035] Figure 5 is a perspective view of the placement station of the present application;

[0036] Figure 6 is a perspective view of the placement station of the present application;

[0037] Figure 7 is a perspective view of the clamping assembly of the present application;

[0038] Figure 8 is a perspective view of the calibration assembly of the present application;

[0039] Figure 9 is a perspective view of the gas delivery cylinder of the present application;

[0040] Figure 10 is a perspective view of the push cylinder of the present application;

[0041] Figure 11 is a perspective view of the marking assembly of the present application;

[0042] Figure 12 is a perspective view of the liquid replenishment assembly of the present application;

[0043] Figure 13 is a perspective view of the liquid cylinder of the present application.

[0044] In the figure: 1, processing table; 11, control panel; 12, moving platform; 121, cutting tool; 13, audible and visual warning light; 14, placing table; 2, clamping assembly; 21, first cylinder; 211, first telescopic rod; 212, push rod; 22, sliding table; 221, clamping ring; 23, rotating frame; 231, connecting strip; 3, calibration assembly; 31, push plate; 311, push rod; 312, push disc; 32, gas cylinder; 321, air inlet pipe; 33, push cylinder; 331, sealing disc; 332, push rack; 333, excess rod; 34, drive rod; 341, drive gear; 342, storage wheel; 343, elastic rope; 4, marking assembly; 41, second cylinder; 411, second telescopic rod; 42, magnetic disc; 421, placing groove; 5, liquid supplementing assembly; 51, extrusion plate; 511, extrusion rod; 512, extrusion disc; 52, liquid cylinder; 521, liquid outlet pipe; 522, spray head. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0046] In the embodiments of the present application, the devices or elements impliedly referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more than two, unless otherwise specified precisely and specifically.

[0047] Embodiment one, please refer to Figures 1 to 7 A positioning clamp for machining based on a chain wheel, comprising: a processing table 1, and a placing table 14 rotatably connected inside the processing table 1,

[0048] A moving platform 12 is arranged on the top of the processing table 1, and the bottom of the moving platform 12 is provided with a cutting tool 121;

[0049] The clamping assembly 2 is arranged on the top of the placing table 14 and is used for positioning the chain wheel, facilitating subsequent machining. The clamping assembly 2 comprises four sliding tables 22 which are slidingly connected in the placing table 14, and the top of each sliding table 22 is fixedly connected with a clamping ring 221. The clamping assembly 2 further comprises a first air cylinder 21 which is fixedly connected in the placing table 14, and the output end of the first air cylinder 21 is differentially connected with a first telescopic rod 211. The first telescopic rod 211 is rotatably connected with a pushing rod 212 at the end away from the first air cylinder 21. The bottom of one of the sliding tables 22 is fixedly connected with a connecting plate which is arranged on the surface of the pushing rod 212. The clamping assembly 2 further comprises a rotating frame 23 which is rotatably connected in the placing table 14, and the bottom of the rotating frame 23 is rotatably connected with four connecting strips 231 at the four corners. The end of each connecting strip 231 away from the rotating frame 23 is rotatably connected with the bottom of a sliding table 22.

[0050] The calibration assembly 3 is arranged in the placing table 14 and is used for confirming the center of the chain wheel to be machined.

[0051] The marking assembly 4 is arranged in the placing table 14 and is used for preventing the center points of the two ends of the chain wheel from deviating.

[0052] The liquid supplementing assembly 5 is arranged in the placing table 14 and is used for preventing the raw materials from being unable to be supplemented for a long time use of the marking assembly 4, so that the marking effect is not obvious.

[0053] When the chain wheel to be machined needs to be clamped and positioned, the first air cylinder 21 is started. The first air cylinder 21 drives the pushing rod 212 to retract through the first telescopic rod 211, so that the pushing rod 212 drives one of the sliding tables 22 to move through the connecting plate. When the sliding table 22 moves, it drives the rotating frame 23 to rotate through one of the connecting strips 231. When the rotating frame 23 rotates, it drives the three sliding tables 22 to move through the other three connecting strips 231. Thus, the sliding tables 22 drive the clamping rings 221 to retract, so that the clamping rings 221 clamp and position the outer circle of the chain wheel to be machined.

[0054] Specific embodiment two, please refer to Figures 1 to 10 According to the positioning clamp for chain wheel machining provided in specific embodiment one, the further technical solutions are provided in the embodiment.

[0055] The calibration assembly 3 comprises a push plate 31 fixedly connected to the surface of the first telescopic rod 211 and a gas conveying cylinder 32 fixedly connected to the inside of the placement table 14, the surface of the push plate 31 is fixedly connected with a push rod 311, one end of the push rod 311 away from the push plate 31 is fixedly connected with a push disc 312, the push disc 312 is slidingly connected to the inside of the gas conveying cylinder 32, the calibration assembly 3 further comprises a push cylinder 33 fixedly connected to the inside of the placement table 14 and a drive rod 34 rotationally connected to the inside of the placement table 14, the gas conveying cylinder 32 and the push cylinder 33 are communicated through a gas inlet pipe 321, the inside of the push cylinder 33 is slidingly connected with a sealing disc 331, one end of the sealing disc 331 is fixedly connected with a push rack 332, the inside of the push cylinder 33 is fixedly connected with an excess rod 333, the surface of the drive rod 34 is fixedly connected with a drive gear 341 and a storage wheel 342, the drive gear 341 is in meshing transmission with the push rack 332, the surface of the storage wheel 342 is provided with an elastic rope 343, one end of the elastic rope 343 away from the storage wheel 342 is fixedly connected to the top of the placement table 14, the surface of the elastic rope 343 is fixedly connected with a half ring iron sheet;

[0056] It should be noted that the surface of the push cylinder 33 is provided with a pressure relief valve, when the sealing disc 331 and the excess rod 333 are in contact with each other, the sealing disc 331 no longer moves, as the gas pressure in the inside of the push cylinder 33 continuously increases, when reaching the threshold value of the pressure relief valve, the pressure relief valve is opened to release the excess gas in the inside of the push cylinder 33;

[0057] When the center point of the chain wheel to be processed needs to be confirmed, when the first telescopic rod 211 is retracted, the first telescopic rod 211 drives the push rod 311 to move through the push plate 31, the push rod 311 drives the push disc 312 to move in the inside of the gas conveying cylinder 32, and then the gas in the inside of the gas conveying cylinder 32 is continuously conveyed to the inside of the push cylinder 33 through the gas inlet pipe 321, as the gas in the inside of the push cylinder 33 continuously increases, the sealing disc 331 drives the push rack 332 to move, and then the push rack 332 drives the drive gear 341 to rotate in the moving process, the drive gear 341 drives the storage wheel 342 to rotate through the drive rod 34, and then the elastic rope 343 is gradually stored on the surface of the storage wheel 342, when the sealing disc 331 and the excess rod 333 are in contact with each other, the elastic rope 343 is in a straightened state, when the two elastic ropes 343 are in a straightened state, the intersection between the two elastic ropes 343 forms a center point;

[0058] Specific embodiment three, please refer to Figures 1 to 11 According to the positioning clamp based on chain wheel machining provided in specific embodiment two, the further technical solutions are provided in the embodiment;

[0059] The marking assembly 4 comprises a second cylinder 41 fixedly connected inside the placing table 14, the output end of the second cylinder 41 is differentially connected with a second telescopic rod 411, the top of the second telescopic rod 411 is fixedly connected with a magnetic disc 42, the top of the magnetic disc 42 is provided with a placing groove 421, the shape of the placing groove 421 is matched with the shape of the elastic rope 343, the surface of the machining table 1 is provided with a control panel 11, the top of the machining table 1 is provided with a sound-light warning lamp 13, and the control panel 11 is electrically connected with the first cylinder 21, the second cylinder 41 and the sound-light warning lamp 13;

[0060] When it is necessary to mark the center point of the chain wheel to be machined, the second cylinder 41 is started when the two elastic ropes 343 are in the straightened state, the second cylinder 41 drives the magnetic disc 42 to rise through the second telescopic rod 411, so that the two elastic ropes 343 enter the inside of the placing groove 421, and then the magnetic disc 42 adsorbs the two elastic ropes 343 through the half-ring iron sheet, and then the second telescopic rod 411 is retracted through the second cylinder 41, so that the magnetic disc 42 drives the elastic rope 343 to retract through the half-ring iron sheet, and as the magnetic disc 42 continuously descends, the elastic rope 343 is gradually stretched, and when the magnetic disc 42 is separated from the half-ring iron sheet, the elastic rope 343 quickly retracts, so that the marking paint on the surface of the elastic rope 343 is bounced on the surface of the chain wheel to be machined;

[0061] Specific embodiment four, please refer to Figures 1 to 13 , according to the positioning clamp based on chain wheel machining provided in specific embodiment three, the further technical solutions are provided in the embodiment:

[0062] The liquid supplement assembly 5 comprises an extrusion plate 51 fixedly connected to the surface of the second telescopic rod 411 and a liquid cylinder 52 fixedly connected inside the placing table 14, the bottom of the extrusion plate 51 is fixedly connected with an extrusion rod 511, the bottom of the extrusion rod 511 is fixedly connected with an extrusion disc 512, the extrusion disc 512 is slidingly connected inside the liquid cylinder 52, the surface of the liquid cylinder 52 is fixedly communicated with a liquid outlet pipe 521, and one end of the liquid outlet pipe 521 is fixedly communicated with a spray head 522;

[0063] It should be noted that the inside of the placing groove 421 is provided with a through groove, when the liquid sprayed by the spray head 522 is transferred to the middle part of the elastic rope 343 through the inclined elastic rope 343, when the elastic rope 343 is separated from the magnetic disc 42, the excess liquid in the middle part of the elastic rope 343 drops into the through groove along with the rapid recovery of the elastic rope 343;

[0064] When the surface of the elastic rope 343 needs to be replenished with the marking paint, when the second telescopic rod 411 is lowered, the second telescopic rod 411 drives the extrusion rod 511 to be lowered through the extrusion plate 51, the extrusion rod 511 drives the extrusion disc 512 to move inside the liquid cylinder 52, and then the paint inside the liquid cylinder 52 enters the inside of the spray head 522 through the liquid outlet pipe 521, and then is transferred to the surface of the elastic rope 343 through the spray head 522. Since the elastic rope 343 is in an inclined state during the lowering process, the paint can flow to the middle part of the elastic rope 343, and then the paint on the surface of the elastic rope 343 is replenished;

[0065] In a fifth embodiment, the present application further provides a positioning method for chain wheel machining, which specifically comprises the following steps:

[0066] Step 1, place the chain wheel to be machined inside the placement table 14, and position and fix the outer surface of the chain wheel to be machined through the clamping assembly 2;

[0067] Step 2, when the clamping assembly 2 is operating, the clamping assembly 2 synchronously drives the calibration assembly 3, so that the calibration assembly 3 determines the center point of the chain wheel to be machined;

[0068] Step 3, start the marking assembly 4, so that the marking assembly 4 marks the center point confirmed by the calibration assembly 3, and then the center point of the chain wheel is marked;

[0069] Step 4, when the marking assembly 4 is operating, the marking assembly 4 synchronously drives the liquid supplementing assembly 5, so that the liquid supplementing assembly 5 supplements the marking liquid used by the calibration assembly 3;

[0070] Step 5, after the operation of step 4 is completed, the chain wheel is turned over and placed, and then the outer circle and the inner hole of the chain wheel are roughly machined through the cutting tool 121.

[0071] Working principle: in use, need to clamp positioning of the chain wheel to be processed, start the first cylinder 21, the first cylinder 21 through the first telescopic rod 211 drive push rod 212 back, make push rod 212 through the connecting plate drive one of the sliding table 22 movement, one of the sliding table 22 in the movement through one of the connecting strip 231 drive rotating frame 23 rotation, make rotating frame 23 in the rotation through another three connecting strip 231 drive three sliding table 22 movement, in turn make sliding table 22 drive clamping ring 221 back, make clamping ring 221 the outer circle of the chain wheel to be processed is clamped and positioned, need to confirm the center point of the chain wheel to be processed, when the first telescopic rod 211 back, the first telescopic rod 211 through the push plate 31 drive push rod 311 movement, make push rod 311 drive push disc 312 in the inside of the air cylinder 32 movement, in turn the gas in the inside of the air cylinder 32 through the air inlet pipe 321 constantly delivered to the inside of the push cylinder 33, with the increasing of the gas in the inside of the push cylinder 33, make sealing disc 331 drive push rack 332 movement, in turn make push rack 332 in the movement process drive driving gear 341 rotation, make driving gear 341 through drive rod 34 drive storage wheel 342 rotation, in turn gradually storage elastic rope 343 in the surface of storage wheel 342, when sealing disc 331 and over rod 333 contact each other, elastic rope 343 is in straight state, when two elastic rope 343 is in straight state, the intersection between two elastic rope 343 forms the center point, need to mark the center point of the chain wheel to be processed, when two elastic rope 343 is in straight state, start the second cylinder 41, the second cylinder 41 through the second telescopic rod 411 drive magnetic disc 42 rise, make two elastic rope 343 enter to the inside of the placing groove 421, in turn make magnetic disc 42 through half ring iron sheet adsorb two elastic rope 343, then through the second cylinder 41 drive second telescopic rod 411 back, make magnetic disc 42 through half ring iron sheet drive elastic rope 343 back, with the constantly descending of magnetic disc 42, make elastic rope 343 be gradually stretched, when magnetic disc 42 and half ring iron sheet separate, elastic rope 343 quickly back, make the marking pigment on the surface of elastic rope 343 bounce on the surface of the chain wheel to be processed, need to supplement the marking pigment on the surface of elastic rope 343, when the second telescopic rod 411 descend, the second telescopic rod 411 through the extrusion plate 51 drive extrusion rod 511 descend, make extrusion rod 511 drive extrusion disc 512 in the inside of the liquid cylinder 52 movement, in turn make the pigment in the inside of the liquid cylinder 52 through the liquid outlet pipe 521 enter to the inside of the nozzle 522, in turn through the nozzle 522 transfer to the surface of elastic rope 343, because elastic rope 343 in the process of descending is in the inclined state, therefore can make the pigment flow to the middle part of elastic rope 343, in turn make the pigment on the surface of elastic rope 343 get supplement, complete the above operation, turn over the chain wheel to be processed, make cutting tool 121 rough machining of the outer circle and the inner hole of the chain wheel to be processed.

[0072] The contents of the specification not described in detail are all prior art known to those skilled in the art.

[0073] It should be noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0074] Parallel: The parallel defined in this application is not limited to absolute parallel, the definition of this parallel can be understood as substantially parallel, allowing not absolute parallel caused by factors such as assembly tolerance, design tolerance, structure flatness, allowing the existence of a small angle range of error, for example, within the assembly error range of 10 degrees, can be understood as parallel relationship.

[0075] Vertical: The vertical defined in this application is not limited to the relationship of absolute vertical intersection (included angle is 90 degrees), allowing not absolute vertical intersection relationship caused by factors such as assembly tolerance, design tolerance, structure flatness, allowing the existence of a small angle range of error, for example, within the assembly error range of 80 degrees to 100 degrees, can be understood as vertical relationship.

[0076] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for machining based on a sprocket, comprising: The machining table (1) and the placing table (14) rotatably connected in the machining table (1) are characterized by comprising: A moving platform (12) is arranged on the top of the machining table (1), and the bottom of the moving platform (12) is provided with a cutting tool (121); A clamping assembly (2) is arranged on the top of the placing table (14) and used for positioning the chain wheel, facilitating subsequent machining. The clamping assembly (2) comprises four sliding tables (22) slidably connected in the placing table (14), and the top of each of the four sliding tables (22) is fixedly connected with a clamping ring (221). The clamping assembly (2) further comprises a first air cylinder (21) fixedly connected in the placing table (14), and the output end of the first air cylinder (21) is differentially connected with a first telescopic rod (211). The first telescopic rod (211) is rotatably connected with a push rod (212) at the end away from the first air cylinder (21). The bottom of one of the sliding tables (22) is fixedly connected with a connecting plate, and the connecting plate is arranged on the surface of the push rod (212); A calibration assembly (3) is arranged in the placing table (14) and used for confirming the center of the chain wheel to be machined. The calibration assembly (3) comprises a push plate (31) fixedly connected to the surface of the first telescopic rod (211) and a gas conveying cylinder (32) fixedly connected in the placing table (14). The surface of the push plate (31) is fixedly connected with a push rod (311), and the end of the push rod (311) away from the push plate (31) is fixedly connected with a push disc (312) slidably connected in the gas conveying cylinder (32). The calibration assembly (3) further comprises a push cylinder (33) fixedly connected in the placing table (14) and a driving rod (34) rotatably connected in the placing table (14). The gas conveying cylinder (32) and the push cylinder (33) are communicated through a gas inlet pipe (321). The inside of the push cylinder (33) is slidably connected with a sealing disc (331), and one end of the sealing disc (331) is fixedly connected with a push rack (332). The inside of the push cylinder (33) is fixedly connected with an overrunning rod (333). The surface of the driving rod (34) is fixedly connected with a driving gear (341) and a storage wheel (342). The driving gear (341) is in meshing transmission with the push rack (332). The surface of the storage wheel (342) is provided with an elastic rope (343), and one end of the elastic rope (343) away from the storage wheel (342) is fixedly connected to the top of the placing table (14). The surface of the elastic rope (343) is fixedly connected with a half ring iron sheet. The marking assembly (4) is arranged in the interior of the placing table (14) and is used for preventing the center points of the two ends of the chain wheel from being deviated, the marking assembly (4) comprises a second air cylinder (41) fixedly connected in the interior of the placing table (14), a second telescopic rod (411) differentially connected to the output end of the second air cylinder (41), a magnetic disc (42) fixedly connected to the top of the second telescopic rod (411), and a placing groove (421) formed in the top of the magnetic disc (42) and matched with the elastic rope (343) in shape. The liquid supplementing assembly (5) is arranged in the interior of the placing table (14) and is used for preventing the paint of the marking assembly (4) from not being supplemented for a long time, so that the marking effect is not obvious.

2. The positioning fixture for machining based on a chain wheel according to claim 1, characterized in that: The clamping assembly (2) further comprises a rotating frame (23) rotatably connected in the interior of the placing table (14), and a connecting strip (231) rotatably connected to each of the four corners of the bottom of the rotating frame (23), and one end of the connecting strip (231) away from the rotating frame (23) is rotatably connected to the bottom of the sliding table (22).

3. The positioning fixture for machining based on a chain wheel according to claim 1, characterized in that: The liquid supplementing assembly (5) comprises an extrusion plate (51) fixedly connected to the surface of the second telescopic rod (411) and a liquid cylinder (52) fixedly connected in the interior of the placing table (14), the bottom of the extrusion plate (51) is fixedly connected with an extrusion rod (511), the bottom of the extrusion rod (511) is fixedly connected with an extrusion disc (512), the extrusion disc (512) is slidably connected in the interior of the liquid cylinder (52), the surface of the liquid cylinder (52) is fixedly connected with a liquid outlet pipe (521), and one end of the liquid outlet pipe (521) is fixedly connected with a spray head (522).

4. The positioning fixture for machining based on a chain wheel according to claim 1, characterized in that: The surface of the processing table (1) is provided with a control panel (11), the top of the processing table (1) is provided with an audible and visual warning light (13), and the control panel (11) is electrically connected with the first air cylinder (21), the second air cylinder (41) and the audible and visual warning light (13).

5. A positioning method for machining based on a sprocket wheel, characterized by: The positioning clamp for chain wheel machining is used, and the positioning method for chain wheel machining comprises the following steps: Step 1, placing the chain wheel to be machined in the interior of the placing table (14), and positioning and fixing the outer surface of the chain wheel to be machined by the clamping assembly (2); Step 2, when the clamping assembly (2) is operated, the clamping assembly (2) synchronously drives the calibration assembly (3), so that the calibration assembly (3) determines the center point of the chain wheel to be machined; Step 3, starting the marking assembly (4), so that the marking assembly (4) marks the center point confirmed by the calibration assembly (3), and then the center point of the chain wheel is marked; Step 4, when the marking assembly (4) is operated, the marking assembly (4) synchronously drives the liquid supplementing assembly (5), so that the liquid supplementing assembly (5) supplements the marking liquid used by the calibration assembly (3); Step 5, after the operation in step 4 is completed, the chain wheel is turned over and placed, and then the outer circle and the inner hole of the chain wheel are coarsely machined by the cutting tool (121).

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