Positioning tool for assisting milling of chain nest of chain wheel

Abstract

The utility model provides a positioning tool for assisting in milling a chain nest of a chain wheel, which comprises a rotating table and a clamping jaw mechanism assembled on the rotating table and used for clamping a chain wheel workpiece, and an angular positioning mechanism for assisting in aligning the chain wheel is fixedly arranged on the rotating table and positioned on the outer side of the clamping jaw mechanism. The center of a positioning opening, used for clamping sprockets of the chain wheel workpiece, of the angular positioning mechanism is located at the zero point position of a rotating shaft of the rotating table, the angular positioning mechanism is flush with the clamping jaw mechanism, and the positioning opening, used for clamping the sprockets of the chain wheel workpiece, of the angular positioning mechanism is flush with the center line of the clamping jaw mechanism. The positioning opening of the angular positioning mechanism can clamp any one sprocket of a sprocket workpiece fixed on the clamping jaw mechanism, so that the center line of the sprocket coincides with the zero position of the rotating shaft of the rotating table, alignment of the sprocket workpiece can be rapidly assisted, the trouble of manual alignment is avoided, the alignment time is shortened, and the production efficiency is improved. And the milling efficiency of the chain nest of the chain wheel is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lathe milling positioning, in particular to a positioning tool for assisting sprocket chain nest milling. Background Art

[0002] Mechanized coal mining relies primarily on scraper conveyors for loading, unloading, and transportation. A typical chain drive mechanism, a mining scraper conveyor uses a drive sprocket to drive the scraper chain in a circular motion, discharging the ore. The sprocket is the conveyor's primary drive component. In addition to transmitting the enormous torque generated by the power source, it also withstands significant alternating and impact loads during engagement with the chain. The sprocket nest is a critical component in sprocket manufacturing and testing, directly impacting the meshing performance between the chain and sprocket. The production of the sprocket nest requires precision, standardization, and relevance.

[0003] Sprocket nest milling is a common machining method. Due to the special structure of the sprocket, the machining accuracy of the nest directly affects the performance of the sprocket. Traditional sprocket nest milling usually uses a universal fixture, which requires manual alignment of the sprocket to determine the distance between the milling cutter's starting position for the nest and the center of the workpiece. Due to the low efficiency and long processing time of manual alignment, it invisibly takes up part of the processing time, resulting in low sprocket nest milling efficiency. Utility Model Content

[0004] In view of this, it is necessary to provide a positioning tool for assisting in the milling of the sprocket chain nest to solve the technical problems in the prior art of low efficiency and long time required for manual sprocket alignment, resulting in low efficiency in the milling of the sprocket chain nest.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The cam is fixed on the workbench with the toothed guide pins, and the cam is fixed on the workbench with the toothed guide pins, so that the cam can move relative to the toothed guide pins of the sprocket workpiece.

[0007] Preferably, the rotary workbench is provided with a support platform for supporting the sprocket workpiece in an outer ring shape located at the outer periphery of the claw mechanism, the support platform is arranged parallel to and lower than the claw mechanism, the angular positioning mechanism is arranged on the outer side of the support platform, the angular positioning mechanism includes a fixed base, a locking screw, and a positioning clamp, the fixed base is arranged parallel to the outer side of the support platform and is located at the zero point position of the rotation axis of the rotary workbench, a positioning slide groove is provided in parallel on the upper end surface of the fixed base, the opening direction of the positioning slide groove is perpendicular to the center line of the rotation axis of the rotary workbench, a base plate is fixedly provided laterally at the center of the positioning slide groove, the locking screw is laterally rotatably arranged on the base plate, the two ends of the locking screw extend to the two ends of the positioning slide groove respectively, and one end of the locking screw is provided with a positive thread The two cams are connected by threads engaged, and the two cams have the function of contacting each other, and the two cams have the function of contacting each other, and the two cams have the function of contacting each other, and the two cams have the function of contacting each other, and the two cams have the function of contacting each other, and the two cams have the function of contacting each other, and the two cams have the function of contacting each other, and the two cams have the function of contacting each other, and the

[0008] Preferably, fixed clamping blocks are provided on the upper end surfaces of the two positioning clamping seats relative to each other, and the above-mentioned positioning opening for clamping the chain teeth of the sprocket workpiece is formed between the two fixed clamping blocks. The two positioning clamping seats are detachable and replaceable.

[0009] Preferably, the end surface of the fixed clamping block in contact with the chain teeth is provided with raised anti-slip lines.

[0010] Preferably, at least one group of auxiliary clamping components is arranged on the inner side of the support platform, and the auxiliary clamping component includes a fixing screw, a pressure plate and a locking nut. The lower end of the fixing screw is fixedly installed on the rotary worktable, and the upper end of the fixing screw extends above the support platform and passes through the sprocket workpiece fixed on the claw mechanism. The pressure plate is laterally sleeved on the fixing screw and pressed on the upper end surface of the sprocket workpiece. The locking nut is threadedly connected with the upper end of the fixing screw to lock the pressure plate and lock the sprocket workpiece on the support platform.

[0011] It can be seen from the above technical solution that the present application provides a positioning tool for auxiliary sprocket chain nest milling, including a rotary worktable and a claw mechanism assembled on the rotary worktable for clamping the sprocket workpiece, and an angular positioning mechanism for auxiliary sprocket alignment is fixedly arranged on the outer side of the claw mechanism on the rotary worktable, the center of the positioning opening of the sprocket tooth of the angular positioning mechanism for clamping the sprocket workpiece is located at the zero point position of the rotation axis of the rotary worktable, and the angular positioning mechanism is flush with the claw mechanism, and the positioning opening of the sprocket tooth of the angular positioning mechanism for clamping the sprocket workpiece is aligned with the center line of the claw mechanism. The positioning opening of the angular positioning mechanism can clamp any one of the sprocket workpieces fixed on the claw mechanism, so that the center line of the sprocket tooth coincides with the zero point position of the rotation axis of the rotary worktable, which can quickly assist in the alignment of the sprocket workpiece, avoids the trouble of manual alignment, shortens the alignment time, and improves the efficiency of sprocket chain nest milling. Moreover, the angular positioning mechanism is used to clamp the chain teeth, which also plays an auxiliary fixing role for the sprocket workpiece, thereby reducing the displacement of the sprocket workpiece when it is subjected to the milling force of the milling cutter or the insufficient clamping force of the claw mechanism during the milling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0013] Figure 2 It is a structural schematic diagram of the angular positioning mechanism.

[0014] Figure 3 It is a schematic diagram of the exploded structure of the angular positioning mechanism.

[0015] Figure 4 This is a schematic diagram of the three-dimensional structure of the sprocket workpiece clamping device of the utility model.

[0016] Figure 5 The figure is a schematic top view of the structure of the sprocket workpiece clamping device of the utility model.

[0017] Figure 6 Schematic diagram of the structure of the sprocket workpiece.

[0018] In the figure: a rotary worktable 10, a support table 11, a claw mechanism 20, an angular positioning mechanism 30, a sprocket workpiece 50, a sprocket tooth 51, a fixed base 301, a locking screw 302, a positioning clamp seat 303, a positioning slide groove 304, a base plate 305, a fixed clamp block 306, an anti-slip pattern 307, a positioning port 308, an auxiliary clamping assembly 40, a fixing screw 401, a pressure plate 402, and a locking nut 403. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, a brief introduction will be given below to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Please see Figures 1 to 6 The embodiment of the present invention provides a positioning tool for auxiliary sprocket chain nest milling, including a rotary table 10, a clamping mechanism 20 assembled on the rotary table 10 for clamping the sprocket workpiece 50, the rotary table 10 is a machine tool accessory that can be rotated and indexed, and is installed on the working surface of the machine tool to achieve rotation and indexing positioning, the clamping mechanism 20 is a precision three-jaw self-centering chuck or a three-jaw hydraulic chuck for clamping and fixing the sprocket workpiece 50, and an angular positioning mechanism 30 for assisting the alignment of the sprocket workpiece 50 is fixedly provided on the rotary table 10 on the outside of the clamping mechanism 20, the angular positioning mechanism 30 is used to clamp the center of the positioning port 308 of the chain tooth 51 of the sprocket workpiece 50 at The zero point position of the rotation axis of the rotary table 10, and the angular positioning mechanism 30 is flush with the claw mechanism 20, and the positioning opening 308 of the angular positioning mechanism 30 for clamping the sprocket workpiece 50 of the sprocket workpiece is aligned with the center line of the claw mechanism 20. When the sprocket workpiece 50 is clamped, the positioning opening 308 of the angular positioning mechanism 30 is used to clamp both sides of any sprocket 51 of the sprocket workpiece 50 fixed on the claw mechanism 20, and the sprocket workpiece 50 is aligned so that the center line of the sprocket tooth 51 coincides with the zero point position of the rotation axis of the rotary table 10, so as to determine the distance between the starting position of the chain nest of the sprocket workpiece 50 of the milling cutter of the lathe and the center of the workpiece, so as to facilitate the lathe to mill the chain nest of the sprocket workpiece 50.

[0021] Specifically, the rotary table 10 is provided with a support platform 11 for supporting the sprocket workpiece 50 in an annular manner on the outer periphery of the claw mechanism 20, the support platform 11 is arranged parallel to and lower than the claw mechanism 20, and the angular positioning mechanism 30 is arranged on the outer side of the support platform 11, and the angular positioning mechanism 30 includes a fixed base 301, a locking screw rod 302, and a positioning clamp seat 303. The fixed base 301 is arranged parallel to the outer side of the support platform 11 and is located at the zero point position of the rotation axis of the rotary table 10, and a positioning slide groove 304 is opened in parallel on the upper end surface of the fixed base 301, and the opening direction of the positioning slide groove 304 is perpendicular to the center line of the rotation axis of the rotary table 10, and a base plate 305 is fixedly arranged transversely at the center of the positioning slide groove 304, and the locking screw rod 302 is arranged on the base plate 305 in a transversely rotatable manner, and the two ends of the locking screw rod 302 extend to the two ends of the positioning slide groove 304 respectively, and one end of the locking screw rod 302 is set When the locking screw 302 is rotated, the two positioning clamps 303 are clamped on both sides of the sprocket workpiece 50, so that the center line of the sprocket tooth 51 is aligned with the zero point position of the rotation axis of the rotary table 10.When clamping the sprocket workpiece 50, place the sprocket workpiece 50 parallel to the support table 11, manually rotate the locking screw 302 in the opposite direction, and use the forward and reverse threads at both ends of the locking screw 302 to simultaneously push the two positioning clamps 303 to move backwards, so that they move away from each other to open the positioning opening 308, and manually adjust the position of the sprocket workpiece 50 so that one of the sprocket teeth 51 is located between the two positioning clamps 303, and the sprocket workpiece 50 is positioned at the center of the circle by the claw mechanism 20, and then manually rotate the locking screw 302 in the positive direction to push the two positioning clamps 303 to move in opposite directions by the locking screw 302, and the two positioning clamps 303 are simultaneously The zero point position of the rotation axis of the rotary table 10 is centered. If the sprocket workpiece 50 is not placed properly, the sprocket workpiece 50 will adaptively rotate along the rotation axis of the rotary table 10 under the clamping force of the two positioning clamps 303 until the two positioning clamps 303 are respectively clamped on the tooth surfaces on both sides of the sprocket 51, so that the center line of the sprocket 51 coincides with the zero point position of the rotation axis of the rotary table 10, so as to determine the distance between the starting position of the milling cutter for the chain nest and the center of the workpiece, and adjust the claw mechanism 20 again to lock the sprocket workpiece 50 through the claw mechanism 20, so as to facilitate the lathe to mill the chain nest of the sprocket workpiece 50.

[0022] Please see Figures 1 to 3 Furthermore, in a preferred embodiment, the upper end surfaces of the two positioning clamps 303 are respectively provided with detachable and replaceable fixed clamping blocks 306, and the upper end surfaces of the two positioning clamps 303 are flush with the upper end surface of the support platform 11, which can be used to support the edge of the sprocket workpiece 50. The above-mentioned positioning openings 308 for clamping the sprocket teeth 51 of the sprocket workpiece 50 are formed between the two fixing clamping blocks 306. The end surfaces of the two fixing clamping blocks 306 that contact the sprocket teeth 51 are respectively provided with raised anti-slip grooves 307, and the height of the fixing clamping blocks 306 is flush with the claw mechanism 20. The shapes of the two fixing clamping blocks 306 can be replaced according to the tooth gap and ruler height of the sprocket teeth 51, so as to facilitate clamping and alignment of sprocket workpieces 50 of different specifications.

[0023] Please see Figure 1 and Figure 4 Furthermore, at least one group of auxiliary pressing components 40 is provided on the inner side of the support platform 11, and the auxiliary pressing component 40 includes a fixed screw 401, a pressure plate 402 and a locking nut 403. The lower end of the fixed screw 401 is fixedly installed on the rotary worktable 10, and the upper end of the fixed screw 401 extends above the support platform 11 and passes through the sprocket workpiece 50 fixed on the claw mechanism 20. The pressure plate 402 is laterally sleeved on the fixed screw 401 and pressed on the upper end surface of the sprocket workpiece 50. The locking nut 403 is threadedly connected to the upper end of the fixed screw 401 to lock the pressure plate 402 and lock the sprocket workpiece 50 on the support platform 11.

[0024] The above disclosure is only a preferred embodiment of the present invention, and it is certainly not intended to limit the scope of the rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A positioning tool for assisting in the milling of sprocket chain pockets, comprising a rotary table and a clamping claw mechanism mounted on the rotary table for clamping a sprocket workpiece, characterized in that: An angular positioning mechanism for assisting in the alignment of the sprocket workpiece is fixedly provided on the outer side of the claw mechanism on the rotary workbench. The center of the positioning opening of the sprocket teeth of the angular positioning mechanism for clamping the sprocket workpiece is located at the zero point position of the rotation axis of the rotary workbench, and the angular positioning mechanism is flush with the claw mechanism. The positioning opening of the sprocket teeth of the angular positioning mechanism for clamping the sprocket workpiece is aligned with the center line of the claw mechanism. The positioning opening of the angular positioning mechanism can clamp any sprocket tooth of the sprocket workpiece fixed on the claw mechanism so that the center line of the sprocket tooth coincides with the zero point position of the rotation axis of the rotary workbench, so as to assist in the alignment of the sprocket workpiece, so as to facilitate the lathe to mill the chain pocket of the sprocket workpiece.

2. The positioning fixture for auxiliary sprocket chain socket milling according to claim 1, characterized in that: The cam is secured to the outside of the workbench and is located adjacent to the cam, and the cam has a latching mechanism that allows it to be steered clear of the cam and into engagement with the workbench, thereby allowing the cam to be retracted and retracted relative to the workbench. A reverse thread is provided at one end, and there are two positioning clamps, which are relatively arranged on the positioning slide and are respectively connected with the threads at both ends of the locking screw. The two positioning clamps are located on both sides of the zero point position of the rotating shaft of the rotary worktable, and the upper ends of the two positioning clamps are flush with the claw mechanism. A positioning opening for clamping the sprocket workpiece is formed between the two positioning clamps, and the center of the positioning opening is located at the zero point position of the rotating shaft of the rotary worktable and is aligned with the center line of the claw mechanism. Rotating the locking screw can synchronously push the two positioning clamps to move in opposite or reverse directions along the positioning slide. During the opposite movement, the two positioning clamps can clamp each other on both sides of any sprocket of the sprocket workpiece, so that the center line of the sprocket coincides with the zero point position of the rotating shaft of the rotary worktable.

3. The positioning tool for auxiliary sprocket chain socket milling according to claim 2, characterized in that: The upper end surfaces of the two positioning clamps are oppositely provided with fixed clamping blocks, and the above-mentioned positioning opening for clamping the chain teeth of the sprocket workpiece is formed between the two fixed clamping blocks. The two positioning clamps are detachable and replaceable.

4. The positioning tool for auxiliary sprocket chain socket milling according to claim 3, characterized in that: The end surface of the fixed clamping block in contact with the chain teeth is provided with raised anti-skid lines.

5. The positioning tool for auxiliary sprocket chain socket milling according to claim 2 or 4, characterized in that: At least one group of auxiliary clamping components is arranged on the inner side of the support platform, and the auxiliary clamping component includes a fixing screw, a pressure plate and a locking nut. The lower end of the fixing screw is fixedly installed on the rotary worktable, and the upper end of the fixing screw extends above the support platform and passes through the sprocket workpiece fixed on the claw mechanism. The pressure plate is laterally sleeved on the fixing screw and pressed on the upper end surface of the sprocket workpiece. The locking nut is threadedly connected with the upper end of the fixing screw to lock the pressure plate and lock the sprocket workpiece on the support platform.

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