Clamp of transition lead surface milling device for water meter impeller blade

Abstract

The utility model discloses a fixture for a transition lead surface milling device of a water meter impeller blade, which comprises an angle adjusting seat fixed on a device base, a platform capable of inclining towards an operator is hinged to the outer end of the angle adjusting seat, one end of a supporting arm is hinged to the bottom of the platform, and the other end of the supporting arm is hinged to the angle adjusting seat. The other end of the supporting arm is hinged to a nut of a nut lead screw pair, one end of a lead screw of the nut lead screw pair is provided with a driving device for driving the lead screw to rotate, one side of the platform is provided with an index plate driven by a motor, and the top of the index plate is provided with a structure which is limited in the circumferential direction and the radial direction of a hub of the water meter impeller. And the other side of the platform is provided with a rotary pressing cylinder which is used for axially pressing the center of the water meter impeller when the milling cutter above mills the transition lead surface of one blade of the water meter impeller and loosening the water meter impeller when the water meter impeller is rotated. The clamp can flexibly adjust the angle required by the transition lead surface in a stepless manner, the impeller blade is stably and reliably clamped during milling, and the precision requirement of the machining angle of the transition lead surface can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of water meter impeller processing, in particular to a clamp for a transition lead surface milling device of a water meter impeller blade. Background Art

[0002] In order to improve the accuracy of water meters, a transition lead surface is usually milled out with a milling cutter at the top of the original lead surface of each blade of the water meter impeller that has been preliminarily processed near the hub to correct the appropriate error.

[0003] The processing of transition lead surfaces in the prior art is generally carried out on machining centers, but the equipment cost of machining centers is too high, often hundreds of thousands of yuan, and the machining centers are not very targeted and professional, and sometimes it is difficult to meet the requirements of machining efficiency and quality of the transition lead surface of the water meter impeller.

[0004] Later, technicians used the mold processing method to process the impeller blades and the original lead surface and the transition lead surface at one time, but burrs were inevitable, the angle of the transition lead surface was difficult to meet the precision requirements, and it was difficult to adjust the angle of the transition lead surface in time according to water meters of different specifications.

[0005] If a special processing device with strong pertinence for milling the transition lead surface of water meter impeller blades is to be designed, one of the important tasks is to solve the problem of a special fixture for milling the transition lead surface of water meter impeller blades. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a fixture for a transition lead surface milling device of a water meter impeller blade, which can flexibly and steplessly adjust the required angle of the transition lead surface, can conveniently and quickly transfer each blade to the bottom of the milling cutter of the processing device, can stably and reliably clamp the impeller blades during milling, and can meet the accuracy requirements of the transition lead surface processing angle.

[0007] The technical solution of the utility model is to provide a fixture for a transition lead surface milling device of a water meter impeller blade, including an angle adjustment seat fixed on a base of the device, an outer end of the angle adjustment seat is hinged with a platform that can be tilted toward an operator, one end of a support arm is hinged with the bottom of the platform, the other end of the support arm is hinged with a nut of a nut screw pair, one end of the screw of the nut screw pair is provided with a driving device for driving the screw to rotate, one side of the platform is provided with a dividing plate driven to rotate by a motor, the top of the dividing plate is provided with a structure that limits the circumference and radial directions of the hub of the water meter impeller, and the other side of the platform is provided with a rotary pressing cylinder that axially presses the center of the water meter impeller when the upper milling cutter mills the transition lead surface of a blade of the water meter impeller and releases the water meter impeller when the water meter impeller is rotated.

[0008] After adopting the above structure, the fixture of the utility model for the transition lead surface milling device of the water meter impeller blade has the following advantages:

[0009] The processed transition lead surface has no burrs, saving the time of grinding corners.

[0010] The required angle of the transition lead surface can be adjusted flexibly and steplessly, which can fully meet the high-precision requirements of the transition lead surface angle, and ensure the improvement of the water meter accuracy from the perspective of the transition lead surface. The angle of the transition lead surface can be adjusted conveniently, quickly and timely according to water meters of different specifications.

[0011] The dividing plate can be rotated conveniently and flexibly to accurately rotate each blade of the water meter impeller to just below the milling cutter of the device. It is convenient and quick to place or remove the impeller. The rotary clamping cylinder can be used to clamp or release it conveniently and quickly. In the process of the milling cutter processing the transition lead surface, the clamp can firmly, stably and reliably clamp, position and fix the impeller and blades, so that the processed transition lead surface has high precision and good quality.

[0012] Furthermore, a mounting plate is fixed to the bottom of one of the two sides of the platform, the bottom of the mounting plate is fixed to the top of the two supporting legs, the bottom ends of the two supporting legs have respective screw holes, and two fixing screws that also serve as hinge shafts pass through their respective screw holes and screw into the threaded holes on both sides of the angle adjustment seat. After adopting the above specific hinge structure, the platform is more flexible and convenient to pivot relative to the angle adjustment seat fixed on the device base, and after adjusting the required angle, the screws are tightened to fix each other. The specific hinge structure supports the platform in the processing state more firmly, more stably and more reliably.

[0013] Furthermore, there are two bearing seats at the inner and outer ends of the angle adjustment seat, and the two ends of the screw rod are installed on their respective bearing seats via their respective rolling bearings. The nut of the nut-screw pair is a rectangular slider, and the rectangular slider slides in the grooved slide rail of the angle adjustment seat below the screw rod. A first stepper motor 211 for driving the screw rod to rotate is fixed on the bearing seat at the inner end. The lower ends of the two arm rods of the support arm are respectively hinged through the first hinge pins fixed on both sides of the upper part of the rectangular slider, and the upper ends of the two arm rods of the support arm are respectively hinged through two second hinge pins fixed on the bottom surface of the mounting plate. After adopting the above specific nut screw pair structure, the support and rotation of the screw are more flexible, stable and reliable. Driven by the rotation of the screw, the nut slides linearly along the grooved slide rail to steplessly adjust the platform angle more accurately, smoothly and stably. Moreover, since the stepper motor has a self-locking function, the support for the platform in the processing state is more firm, stable and reliable, further ensuring the flexible and stepless adjustment of the required angle of the transition lead surface, meeting the high-precision requirements of the transition lead surface angle, and being able to conveniently, quickly and timely adjust the angle of the transition lead surface according to water meters of different specifications, so that the processed transition lead surface has a high precision and good quality technical effect.

[0014] Furthermore, the bottom surface of the mounting plate has two longitudinal grooves for accommodating the two arms of the mounting plate and the platform when the mounting plate and the platform are swung down, a lower convex plate is fixed to the bottom surface of the mounting plate between the two longitudinal grooves where the two second hinge pins are fixed, the two second hinge pins are fixed on both sides of the lower convex plate and on the two groove walls, and the top parts of the upper ends of the two arms of the support arm hinged on the two second hinge pins are accommodated in their respective longitudinal grooves. After adopting the above structure, the possible interference between the top ends of the two arms and the bottom surface of the mounting plate is eliminated, making the hinge connection between the support arm and the mounting plate more flexible, more stable and more reliable, and because the two longitudinal grooves can accommodate the two arms of the platform and the mounting plate, the amplitude of the swing down is larger, and the angle of adjustment of the impeller blade transition lead surface is wider, and the adaptability is wider.

[0015] Furthermore, there is a dividing plate drive box on one side of the platform, the output shaft of the second stepper motor fixed on the outside of the dividing plate drive box is coaxially fixed with a worm, the worm wheel meshing with the worm is rotatably installed in the dividing plate drive box, and a rotating shaft extending out of the top surface of the dividing plate drive box is fixed to the center hole of the worm wheel, the top of the rotating shaft is fixed to the center of the dividing plate and drives the dividing plate to rotate around the axis of the rotating shaft; at least two protruding columns matching the two limiting holes on the impeller hub to be processed and limiting both circumferentially and radially are symmetrically arranged on the outside of the axis of the dividing plate. After adopting the above specific structure, the driving structure is simple and compact, and the rotation of the dividing plate is flexible, stable, reliable and accurate; the circumferential limiting and radial limiting structures are simple, accurate, stable and reliable, and it is more convenient and faster to place or remove the impeller.

[0016] Furthermore, the center of the indexing plate has an axial central circular column that matches the inner circle of the central blind hole on the bottom surface of the impeller hub of the processed water meter and is used to locate the center of the impeller hub of the water meter; the indexing plate also has a circular protrusion that matches the inner circle of the convex ring of the hub on the bottom surface of the impeller hub of the processed water meter and is used to double-center the impeller hub of the water meter. With the above structure, the center positioning structure of the processed impeller is simple, accurate, stable and reliable, and it is more convenient and faster to place or remove the impeller.

[0017] Furthermore, there is a rotary pressing cylinder seat on the other side of the platform, and the rotary pressing cylinder used to press the top surface of the central column of the water meter impeller is fixed on the top of the rotary pressing cylinder seat. After adopting the above structure, the height of the rotary pressing cylinder is more suitable for the height of the impeller to be pressed, and by pressing the top surface of the central column of the impeller, it is more targeted and practical, and the pressing effect is better.

[0018] Furthermore, the fixture for the milling device of the transition lead surface of the water meter impeller blade also includes a main controller; the mounting plate is provided with a first angle sensor, the indexing plate is provided with a second angle sensor; the first angle sensor, the second angle sensor, the first stepper motor, the second stepper motor and the rotary clamping cylinder are all electrically connected to the main controller. After adopting the above structure, except that the placement or removal of the impeller is still manually operated, the angle of the transition lead surface of the fixture, i.e., the platform angle, is adjusted by the first stepper motor, the indexing plate is rotated at intervals by the second stepper motor to turn each blade to the bottom of the milling cutter, and the rotary clamping cylinder is pressed or loosened and turned away, which are all controlled by the main controller, and the degree of automation is relatively high, and the angle of the transition guide groove surface of the fixture, i.e., the platform angle adjustment accuracy and the indexing plate rotation angle accuracy are both high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the impeller to be processed in the utility model. Figure 1 (relative to Figure 3 , Figure 4 enlarge).

[0020] Figure 2 This is a schematic diagram of the structure of the impeller to be processed in the utility model. Figure 2 (relative to Figure 3 , Figure 4 enlarge).

[0021] Figure 3 It is a structural schematic diagram of the utility model when the fixture is applied to a transition guide groove surface milling device.

[0022] Figure 4 This is a schematic diagram of the structure of the utility model clamp Figure 1 .

[0023] Figure 5 This is a schematic diagram of the structure of the utility model clamp Figure 2 .

[0024] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of A.

[0025] As shown in the figure:

[0026] 1. transition lead surface milling device, 11. base, 12. milling cutter;

[0027] 2. Clamp, 21. Platform, 22. Angle adjustment seat, 221. Grooved slide rail, 23. Nut screw pair, 231. Rectangular slider, 232. Screw, 24. Indexing plate, 241. Boss, 242. Circular protrusion, 243. Countersunk hole, 244. Center circular column, 25. Rotary clamping cylinder, 251. Rocker arm, 252. Press block, 26. Mounting plate, 261. Longitudinal groove, 27. Support leg, 28. Fastening screw, 29. Bearing seat, 210. Rolling bearing, 211. First stepper motor, 212. Arm, 213. First hinge pin, 214. Second hinge pin, 215. Lower convex plate, 216. Indexing plate drive box, 217. Second stepper motor, 218. Transition plate, 219. Rotary clamping cylinder seat;

[0028] 3. Water meter impeller, 31. Hub, 311. Center blind hole, 312. Convex ring, 313. Center column, 32. Blade, 321. Transition lead surface, 322. Original lead surface. DETAILED DESCRIPTION

[0029] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these specific implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical means involved in each specific implementation method of the present invention described below can be combined with each other as long as there is no conflict between them.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 shown.

[0031] The utility model is a fixture for a transition lead surface milling device for water meter impeller blades, comprising an angle adjustment seat 22 fixed on a base 11 of the transition lead surface milling device 1, the outer end of the angle adjustment seat 22 is hinged with a platform 21 that can be tilted toward the operator, one end of a support arm is hinged to the bottom of the platform 21, the other end of the support arm is hinged to a nut of a nut screw pair 23 such as a rectangular slider 231 described below, one end of a screw 232 of the nut screw pair 23 such as the inner end has a driving device for driving the screw 232 to rotate, one side of the platform 21 has a dividing plate 24 driven to rotate by a motor, the top of the dividing plate 24 has a structure that limits the hub 31 of the water meter impeller 3 in both circumferential and radial directions, and the other side of the platform 21 has a rotary clamping cylinder 25 that is used to axially press the center of the water meter impeller 3 when the upper milling cutter 12 mills the transition lead surface 321 of a blade 32 of the water meter impeller 3, and to loosen the water meter impeller 3 when the water meter impeller 3 is rotated. Figure 3As shown, it is not difficult to understand that the tilting toward the operator means that the rear side is high and the front side is low. The entire vertical surface of the blade 32 connected to the transition lead surface 321 is the original lead surface 322.

[0032] One of the two sides of the platform 21 is fixed with a mounting plate 26 at the bottom of the other side as described above, and the bottom of the mounting plate 26 is fixed to the top of the two supporting legs 27. The bottom ends of the two supporting legs 27 have respective screw holes, and two fixing screws 28 that also serve as hinge shafts pass through their respective screw holes and screw into the threaded holes on both sides of the angle adjustment seat 22. After the angle is adjusted, the two fixing screws 28 can be tightened to prevent the screw from slipping, that is, a layer of locking is added on the basis of the self-locking of the nut screw pair 23 to provide double insurance.

[0033] There are two bearing seats 29 at the inner and outer ends of the angle adjustment seat 22. The two ends of the screw rod 232 are installed on their respective bearing seats 29 through their respective rolling bearings 210. The nut of the nut screw rod pair 23 is a rectangular slider 231. The rectangular slider 231 is slidably matched in the grooved slide rail 221 of the angle adjustment seat 22 below the screw rod 232. The first stepper motor 211 for driving the screw rod 232 to rotate is fixed on the inner end of the bearing seat 29. It is not difficult to understand that the output shaft of the first stepper motor 211 is coaxially connected with the screw rod 232. The lower ends of the two arm rods 212 of the support arm are respectively hinged through the first hinge pins 213 fixed on both sides of the upper part of the rectangular slider 231, and the upper ends of the two arm rods 212 of the support arm are respectively hinged through the two second hinge pins 214 fixed on the bottom surface of the mounting plate 26.

[0034] Of course, the driving device for driving the screw rod 232 to rotate can also be a crank fixed on the inner end of the screw rod. However, the degree of operation automation is relatively low, and the angle adjustment accuracy is also relatively low, so it is preferred to use a first stepper motor with the following first angle sensor and main controller structure.

[0035] The bottom surface of the mounting plate 26 has two longitudinal grooves 261 for accommodating part of the two arm rods 212 when the mounting plate 26 and the platform 21 are swung down. A lower convex plate 215 is fixed to the bottom surface of the mounting plate 26 between the two longitudinal grooves 261 where the two second hinge pins 214 are fixed. The two second hinge pins 214 are fixed on both sides of the lower convex plate 215 and on the two groove walls. The top parts of the upper ends of the two arm rods 212 of the support arm hinged on the two second hinge pins 214 are accommodated in their respective longitudinal grooves 261.

[0036] There is a dividing plate drive box 216 on one side of the platform 21. The output shaft of the second stepper motor 217 fixed on the outside of the dividing plate drive box 216 is coaxially fixed with a worm. The worm wheel meshing with the worm is rotatably installed in the dividing plate drive box 216. A rotating shaft extending from the top surface of the dividing plate drive box 216 is fixed to the center hole of the worm wheel. The top of the rotating shaft is fixed to the center of the dividing plate 24 and drives the dividing plate 24 to rotate around the axis of the rotating shaft. At least two protrusions 241 that match the two limiting holes 33 on the impeller hub 31 to be processed and limit the circumferential and radial directions are symmetrically arranged outside the axis of the dividing plate 24. There may be a transition plate 218 between the top surface of the dividing plate drive box 216 and the dividing plate 24. The transition plate 218 is fixed to the rotating shaft. The transition plate 218 is further fixed to the dividing plate 24, such as by screwing and fixing with multiple screws (the screws are not shown in the figure, only four countersunk holes 243 for accommodating the large heads of the screws are shown).

[0037] The center of the indexing plate 24 has an axial central circular column 244 that matches the inner circle of the central blind hole 311 on the bottom surface of the hub 31 of the water meter impeller 3 to be processed and is used to locate the center of the hub 31 of the water meter impeller 3. The indexing plate 24 also has a circular protrusion 242 that matches the inner circle of the hub convex ring 312 on the bottom surface of the hub 31 of the water meter impeller 3 to be processed and is used to double-center the hub 31 of the water meter impeller 3.

[0038] There is a rotary clamping cylinder seat 219 on the other side of the platform 21, and the rotary clamping cylinder 25 for clamping the top surface of the center column 313 of the water meter impeller 3 is fixed on the top of the rotary clamping cylinder seat 219. The specific structure of clamping can be: a clamping block 252 for clamping the top surface of the center column 313 of the water meter impeller 3 is fixed on the bottom surface of the free end of the rocker arm 251 of the rotary clamping cylinder 25, and the clamping block 252 can be a screw, the big head of the screw is the clamping block 252, and the external thread of the screw is screwed into the threaded hole on the bottom surface of the free end of the rocker arm 251. The center column 313 can also be described as the center column 313 on the top surface of the hub 31 of the water meter impeller 3.

[0039] The fixture 2 also includes a main controller; a first angle sensor is provided on the mounting plate, and a second angle sensor is provided on the dividing plate; the first angle sensor, the second angle sensor, the first stepper motor, the second stepper motor and the rotary clamping cylinder are all electrically connected to the main controller. The main controller can be installed in the base 11 of the transition lead surface milling device 1. The main control generally adopts the MCU control chip of the prior art, also known as a single-chip microcomputer. After the MCU control chip receives the electrical signal from the first angle sensor, it controls the start and stop of the first stepper motor through a relay. After the MCU control chip receives the electrical signal from the second angle sensor, it controls the start and stop of the second stepper motor and the start and stop and rotation of the rotary clamping cylinder through a relay. Of course, the main controller can also adopt a PLC, also known as a programmable logic controller.

[0040] The nut screw pair 23 is also called a nut screw pair. The nut screw pair 23 can also be a ball screw pair or a ball screw pair. The rotary clamping cylinder 25 is a commercial product or a commercial commodity. The stepper motor can also be replaced by a servo motor. The fixing is generally welded or screwed with screws or bolts and nuts. The hinged connection can be universal with the pivotal connection or the rotating connection. The mounting plate 26 is also called a connecting plate.

[0041] The above unmarked parts, structures or quantities are not shown in the figures, and some parts are not marked. The drawings are only for reference only. If there is any inconsistency between the drawings and the text description or between the drawings, the text description shall prevail.

[0042] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fixture for a transition lead surface milling device for a water meter impeller blade, characterized in that: It includes an angle adjustment seat fixed on the base of the device, the outer end of the angle adjustment seat is hinged with a platform that can be tilted toward the operator, one end of a support arm is hinged with the bottom of the platform, the other end of the support arm is hinged with a nut of a nut-screw pair, one end of the screw of the nut-screw pair is provided with a driving device for driving the screw to rotate, one side of the platform is provided with a dividing plate driven to rotate by a motor, the top of the dividing plate is provided with a structure that limits the hub of the water meter impeller in both the circumferential and radial directions, and the other side of the platform is provided with a rotary pressing cylinder that is used to axially press the center of the water meter impeller when the upper milling cutter mills the transition lead surface of a blade of the water meter impeller, and to loosen the water meter impeller when the water meter impeller is rotated.

2. The fixture for the transition lead surface milling device of the water meter impeller blade according to claim 1 is characterized in that: A mounting plate is fixed at the bottom of one of the two sides of the platform, and the bottom of the mounting plate is fixed to the top of the two supporting legs. The bottom ends of the two supporting legs have respective screw holes, and two fixing screws that also serve as hinge shafts pass through their respective screw holes and are screwed into the threaded holes on both sides of the angle adjustment seat.

3. The fixture for the transition lead surface milling device of the water meter impeller blade according to claim 1, characterized in that: There are two bearing seats at the inner and outer ends of the angle adjustment seat, and the two ends of the screw rod are installed on their respective bearing seats through their respective rolling bearings. The nut of the nut-screw pair is a rectangular slider, and the rectangular slider slides in the grooved slide rail of the angle adjustment seat below the screw rod. A first stepper motor for driving the screw rod to rotate is fixed on the bearing seat at the inner end. The lower ends of the two arm rods of the support arm are respectively hinged through the first hinge pins fixed on both sides of the upper part of the rectangular slider, and the upper ends of the two arm rods of the support arm are respectively hinged through the two second hinge pins fixed on the bottom surface of the mounting plate.

4. The fixture for the transition lead surface milling device of the water meter impeller blade according to claim 3 is characterized in that: The bottom surface of the mounting plate has two longitudinal grooves for accommodating part of the two arm rods when the mounting plate and the platform are swung down. A lower convex plate is fixed to the bottom surface of the mounting plate between the two longitudinal grooves where the two second hinge pins are fixed. The two second hinge pins are fixed on both sides of the lower convex plate and on the two groove walls. The top parts of the upper ends of the two arm rods of the support arm hinged on the two second hinge pins are accommodated in their respective longitudinal grooves.

5. The fixture for the transition lead surface milling device of the water meter impeller blade according to claim 4, characterized in that: There is a dividing plate drive box on one side of the platform. The output shaft of the second stepper motor fixed on the outside of the dividing plate drive box is coaxially fixed with a worm. The worm wheel meshing with the worm is rotatably installed in the dividing plate drive box. A rotating shaft extending out of the top surface of the dividing plate drive box is fixed to the center hole of the worm wheel. The top of the rotating shaft is fixed to the center of the dividing plate of the drive box and drives the dividing plate to rotate around the axis of the rotating shaft. At least two protrusions that match the two limiting holes on the impeller hub to be processed and limit the circumferential and radial directions are symmetrically arranged on the outside of the axis of the dividing plate.

6. The fixture for the transition lead surface milling device of the water meter impeller blade according to claim 1, characterized in that: There is an axial central circular column in the center of the dividing plate, which matches the inner circle of the central blind hole on the bottom surface of the processed water meter impeller hub and is used to locate the center of the water meter impeller hub; there is also a circular protrusion on the dividing plate, which matches the inner circle of the convex ring of the hub on the bottom surface of the processed water meter impeller hub and is used to double-center the water meter impeller hub.

7. The fixture for the transition lead surface milling device of the water meter impeller blade according to claim 1, characterized in that: A rotary pressing cylinder seat is arranged on the other side of the platform, and a rotary pressing cylinder for pressing the top end surface of the central column of the water meter impeller is fixed on the top end of the rotary pressing cylinder seat.

8. The fixture for the transition lead surface milling device of the water meter impeller blade according to claim 5, characterized in that: It also includes a main controller; the mounting plate is provided with a first angle sensor, and the dividing plate is provided with a second angle sensor; the first angle sensor, the second angle sensor, the first stepper motor, the second stepper motor and the rotary pressing cylinder are all electrically connected to the main controller.

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