CN114309334A - Punching tool for double-impeller assembly - Google Patents
Punching tool for double-impeller assembly Download PDFInfo
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- CN114309334A CN114309334A CN202111672819.9A CN202111672819A CN114309334A CN 114309334 A CN114309334 A CN 114309334A CN 202111672819 A CN202111672819 A CN 202111672819A CN 114309334 A CN114309334 A CN 114309334A
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Abstract
The invention belongs to the field of stamping equipment, and particularly relates to a stamping tool for a double-impeller assembly. This punching press frock includes that this punching press frock includes: the device comprises a platform, a rotating support, a stamping air hammer, a core sleeve press-fitting jig, a shaft press-fitting jig and an extrusion jig. Wherein, rotating bracket includes support and rotating base. The support comprises a vertical rod and a cross rod which are vertical to each other, and the vertical rod is fixedly arranged in the center of the platform through a rotating base; the rotating base is used for driving the support to rotate and respectively stops at three different punching stations. The punching air hammer comprises a hammer body and a punching head. The core sleeve press-fitting jig comprises a first positioning seat, a second positioning seat and a first limiting guide rod. The shaft press-fitting jig comprises a shaft limiting plate, a wheel limiting seat and a second limiting guide rod. The extrusion jig comprises a fixed seat and a movable seat. The invention solves the problems that the special double-impeller component is difficult to machine and form, and has low machining precision, high cost and great process difficulty.
Description
Technical Field
The invention belongs to the field of stamping equipment, and particularly relates to a stamping tool for a double-impeller assembly.
Background
The turbine flowmeter is a speed type flowmeter which comprises a turbine and a probe for detecting the rotating speed of the turbine. The turbine flowmeter can be used for measuring the flow of fluid such as gas medium, liquid and the like; the flowmeter has the advantages of compact structure, high reliability, relatively low cost, lightning protection, small influence of external factors such as temperature and the like.
However, since the turbine flowmeter needs to realize non-contact signal detection by cutting magnetic induction lines depending on the rotation of the turbine blade, the detection accuracy of the flowmeter is easily affected by the electromagnetic interference problem. The poor anti-electromagnetic interference capability is a common fault of the turbine flowmeter, although the influence of an external magnetic field on the measurement precision of the flowmeter can be reduced by arranging a shielding case and the like; however, the interference caused by the transformed magnetic field transmitted from the source of the flowmeter still cannot be effectively solved.
The invention aims to solve the problem that the traditional turbine flowmeter is easily subjected to electromagnetic interference by designing a novel turbine flowmeter with a double-impeller assembly. This particular dual impeller assembly contains two identical impellers with a specific impeller spacing and a specific blade phase angle. The double-impeller assembly meeting the precision requirement is difficult to machine through the conventional machining process, for example, when a numerical control lathe is adopted for machining, the material consumption is high, the machining process is complex, the precision is difficult to control, and the machining cost of a single product is very high. This embodiment contemplates processing the product by a stamping apparatus. However, the double-impeller assembly is complex in structure, and the stamping and assembling process difficulty is high in order to produce qualified products. Meanwhile, no punching equipment capable of machining the special double-impeller assembly exists in the prior art.
Disclosure of Invention
The invention provides a punching tool for a double-impeller assembly, aiming at solving the problems that the special double-impeller assembly is difficult to machine and form, low in machining precision, high in cost, high in process difficulty and the like.
The invention is realized by adopting the following technical scheme:
the punching tool for the double-impeller assembly is used for assembling a special double-impeller assembly, the double-impeller assembly comprises two identical impellers which are coaxially arranged, and the two impellers have a specific blade phase deviation angle and a specific impeller interval on an impeller shaft. In order to manufacture the special double-impeller assembly, the double-impeller assembly is designed to be assembled and produced by the following parts.
The machining parts of the double-impeller assembly assembled in the invention comprise a first impeller, a second impeller, a positioning core sleeve and an impeller shaft. The first impeller comprises a first shaft sleeve and blades which are arranged on the first shaft sleeve in a rotating array mode. The second impeller comprises a second shaft sleeve and a blade; the second impeller and the first impeller are identical except the inner diameter of the shaft sleeve. The inner diameter of the second shaft sleeve is larger than that of the first shaft sleeve. The positioning core sleeve is internally provided with a cylindrical shaft mounting cavity; the outer circumference of the positioning core sleeve is divided into three sections along one end to the other end in a step type reducing mode. Wherein the outer circumference of the first section matches the inner diameter of the first sleeve. The outer circumference of the second section matches the inner diameter of the second bushing. The outer circumference of the third section is larger than the inner diameter of the second sleeve. The first section of the positioning core sleeve comprises a straight cylinder part and a chamfer structure part with a tapered outer diameter positioned at the front end of the straight cylinder part. The length of the straight cylinder part is equal to the width of the first shaft sleeve; the total volume of the chamfer structure part is equal to the volume of the third section in the positioning core sleeve; the length of the second section in the positioning core sleeve is equal to the sum of the thickness of the second shaft sleeve and the preset impeller distance; the outer diameter of the impeller shaft is equal to the inner diameter of the central shaft mounting cavity of the positioning core sleeve.
Aiming at the double-impeller assembly, the invention designs the following stamping tool, the stamping tool can adopt the parts, and the double-impeller assembly meeting the requirements is processed by three times of stamping. This punching press frock includes: the device comprises a platform, a rotating support, a stamping air hammer, a core sleeve press-fitting jig, a shaft press-fitting jig and an extrusion jig.
Wherein, rotating bracket includes support and rotating base. The support comprises a vertical rod and a cross rod which are vertical to each other, and the vertical rod is fixedly arranged in the center of the platform through a rotating base; the rotating base is used for driving the support to rotate and respectively stops at three different punching stations.
The punching air hammer comprises a hammer body and a punching head. The stamping air hammer is arranged below the cross rod; the punching head of the punching air hammer is in a cake shape, and the pressing direction is downward. The first shaft hole is arranged in the center of the punching head, and the inner diameter of the first shaft hole is matched with the outer diameter of the impeller shaft.
The core sleeve press-fitting jig is located on the outer side of the support and just below the first stamping station of the stamping air hammer. The core sleeve press-fitting jig comprises a first positioning seat, a second positioning seat and a first limiting guide rod. The first positioning seat is fixedly arranged on the surface of the platform. A first wheel groove for accommodating a first impeller is formed in the upper surface of the first positioning seat; the bottom of the first wheel groove is provided with a limiting groove matched with the profile of the bottom of the first impeller. A plurality of first limiting guide rods extending vertically upwards are arranged on the periphery of the first positioning seat. The second positioning seat has the same structure as the first positioning seat; the second positioning seat is a split structure which is cut along the longitudinal direction and comprises a left half seat and a right half seat. The peripheries of the left half seat and the right half seat are provided with limiting guide holes which have the same positions as the first limiting guide rods and are matched with the first limiting guide rods in hole diameter; the second positioning seat is sleeved on the first limiting guide rod. The second positioning seat is internally provided with a second wheel groove for accommodating a second impeller, and the bottom surface of the second wheel groove is also provided with a limit groove; and the limiting grooves in the first positioning seat and the second positioning seat deflect relatively, and the deflection angle is equal to a preset blade phase deflection angle. The thickness of the bottom of a second wheel groove in the second positioning seat is equal to the preset impeller distance; the centers of the bottoms of the first positioning seat and the second positioning seat are provided with through holes with inner diameters not smaller than the outer diameter of the second section in the positioning core sleeve.
The shaft press-mounting jig is located on the outer side of the support and just below the second stamping station of the stamping air hammer. The shaft press-fitting jig comprises a shaft limiting plate, a wheel limiting seat and a second limiting guide rod. A plurality of second limiting guide rods which vertically extend upwards are arranged on the periphery of the wheel limiting seat, and limiting guide holes which are the same as the second limiting guide rods in position and are matched with the second limiting guide rods in hole diameter are arranged on the periphery of the shaft limiting plate; the shaft limiting plate is sleeved on the second limiting guide rod. The shaft limiting plate is provided with a shaft through hole matched with the outer diameter of the impeller shaft. The wheel limiting seat is internally provided with an impeller groove matched with the profile of the combination of the first impeller, the second impeller and the positioning core sleeve; the depth of the impeller groove is flush with the height of the assembly. The center of the bottom of the impeller groove is provided with a second shaft hole, the inner diameter of the second shaft hole is matched with the outer diameter of the impeller shaft, and the depth of the second shaft hole is equal to the length of the part of the impeller shaft extending out of the two sides of the impeller in the double-impeller assembly.
The extrusion jig is located on the outer side of the support and just below the third stamping station of the stamping air hammer. The extrusion jig comprises a fixed seat and a movable seat. The bottom surface of the fixed seat is arranged on the platform; the upper part of the fixing seat contains a first limiting groove, the bottom of the first limiting groove is provided with an extrusion groove, and the extrusion groove is matched with the outer contour of the third section in the positioning core sleeve. The extrusion groove is used for extruding the chamfer structure at the bottom of the positioning core sleeve into a structure which is the same as the third section of the positioning core sleeve. A second shaft hole is further formed in the lower portion of the extrusion groove in the fixing seat, the inner diameter of the second shaft hole is matched with the outer diameter of the impeller shaft, and the depth of the second shaft hole is equal to the length of the portion, extending out of the two sides of the impeller, of the double-impeller assembly. The movable seat and the fixed seat are structurally symmetrical and are positioned above the fixed seat; a second limiting groove is arranged in the movable seat, and the total groove depth when the first limiting groove and the second limiting groove are combined is equal to the height of the combination of the first impeller, the second impeller and the positioning core sleeve.
When the platform is taken as a polar coordinate plane and the mounting point of the bracket is taken as a pole, the adjacent polar angles among the first stamping station, the second stamping station and the third stamping station are 120 degrees, and the pole diameters from the center points to the poles of the three stamping stations are equal; and the three punching stations are sequentially arranged according to a preset clockwise or anticlockwise sequence.
As a further improvement of the invention, the punching tool comprises a controller, and the controller is used for controlling the rotary base to rotate 120 degrees each time, so that the three punching stations are sequentially switched.
The controller is also used for controlling the punching air hammer to circularly switch the pressure value and the punching depth of each punching action, so that the punching actions are executed on different punching stations according to the preset pressure values and the punching depths corresponding to the stations.
As a further improvement of the invention, a plurality of third limiting guide rods extending vertically upwards are arranged on the periphery of the fixed seat, and limiting guide holes which are identical to the third limiting guide rods in position and are matched with the third limiting guide rods in aperture are arranged on the periphery of the movable seat; the movable seat is sleeved on the third limiting guide rod.
As a further improvement of the invention, the peripheries of the first positioning seat, the second positioning seat, the shaft limiting plate, the wheel limiting seat, the fixed seat and the movable seat are respectively provided with a connecting lug which protrudes outwards and is used for connecting the limiting guide rod. And the positions of the first positioning seat and the connecting lug on the second positioning seat correspond to each other. The position of the shaft limit plate corresponds to the position of the connecting lug on the wheel limit seat. The positions of the connecting lugs on the fixed seat and the movable seat correspond to each other. The connecting lug on the first positioning seat is fixedly connected with the first limiting guide rod. The connecting lug of the wheel limiting seat is fixedly connected with the second limiting guide rod. The connecting lug on the fixed seat is fixedly connected with the third limiting guide rod. And limiting guide holes for the first limiting guide rod, the second limiting guide rod or the third limiting guide rod to penetrate through are formed in the second positioning seat, the shaft limiting plate and the connecting lugs in the movable seat.
As a further improvement of the invention, the tops of the first limiting guide rod, the second limiting guide rod and the third limiting guide rod are provided with conical tips with gradually reduced outer diameters.
As a further improvement of the invention, the rod bodies of the first limit guide rod and the second limit guide rod are also sleeved with return springs.
As a further improvement of the invention, in the second positioning seat, handles protruding outwards are arranged on the outer sides of the left half seat and the right half seat.
As a further improvement of the invention, the positions of the abutting surfaces of the left half seat and the right half seat are provided with locking bodies for alignment, and the locking bodies comprise locking tongues and locking grooves which are respectively arranged on the left half seat and the right half seat.
The technical scheme provided by the invention has the following beneficial effects:
the special punching tool for processing the required special double-impeller component can process the required double-impeller component through a punching process, and has the advantages of high processing efficiency, simplicity in operation, low processing cost and the like compared with conventional integrated numerical control processing. Meanwhile, the performance of the processed product can completely reach the expectation, and the method has very outstanding practical value and is suitable for large-scale industrial production.
The stamping tool provided by the invention adopts a semi-automatic mode to complete work, and a formed double-impeller assembly is obtained through three times of stamping. In addition, through simple technical transformation, for example, actuators such as related manipulators and cylinders are configured, full-automatic production can be realized, the production efficiency of the double-impeller assembly is further improved, and the production cost of the double-impeller assembly is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an anti-electromagnetic interference turbine flowmeter provided in embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of the remaining part of the turbine flowmeter according to embodiment 1 of the present invention, which does not include the detection probe and the signal converter.
Fig. 3 is a schematic structural view of a double impeller assembly in embodiment 1 of the present invention.
Fig. 4 is a schematic disassembly diagram of various parts in the double-impeller assembly provided in embodiment 2 of the present invention.
Fig. 5 is a schematic structural view of a positioning core sleeve in embodiment 2 of the present invention.
Fig. 6 is a schematic structural diagram of a stamping tool of a dual impeller assembly provided in embodiment 3 of the present invention (an extrusion fixture is not shown in the drawing).
Fig. 7 is a schematic view showing the positional distribution of the functional components in a plan view in the press tool according to embodiment 3 of the present invention.
Fig. 8 is a schematic structural view of a core sleeve press-fitting jig in embodiment 3 of the present invention.
Fig. 9 is a schematic structural view of a shaft press-fitting jig in embodiment 3 of the present invention.
Fig. 10 is a schematic structural view of an extrusion jig according to embodiment 3 of the present invention.
Labeled as:
1. a housing; 2. a front deflector; 3. a rear fluid director; 4. a double impeller assembly; 5. detecting a probe; 6. a signal converter; 7. locking the bolt; 11. mounting a probe in a groove; 13. sealing the flange; 41. a first impeller; 42. a second impeller; 43. an impeller shaft; 44. positioning the core sleeve; 51. a first probe; 52. a second probe; 81. a platform; 82. rotating the bracket; 83. stamping an air hammer; 411. a shaft sleeve; 412. a blade; 440. a shaft mounting cavity; 441. a chamfering structure; 821. a support; 822. rotating the base; 831. a hammer body, 832, a punching head; 841. a first positioning seat; 842. a second positioning seat; 843. a first limit guide rod; 851. a shaft limit plate; 852. a wheel limiting seat; 853. a second limiting rod; 861. a fixed seat; 862. a movable seat.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A turbine flow meter resistant to electromagnetic interference, as shown in fig. 1, comprising: the device comprises a shell 1, a front flow guider 2, a rear flow guider 3, a double-impeller assembly 4, a detection probe 5 and a signal converter 6.
Wherein, the shell 1 is a tubular structure with a fluid channel inside. The fluid channel is in a straight-through type and comprises an inlet end and an outlet end. The middle section of the fluid channel is a turbine cavity; and a probe installation groove 11 is arranged on the outer wall of the shell 1 corresponding to the position of the turbine cavity.
As shown in fig. 2, the front deflector 2 is rotatably installed at one side of the inlet end of the fluid passage in the housing 1, and the front deflector 2 is coaxially disposed with the fluid passage. The rear fluid director 3 is rotatably installed at one side of the outlet end of the fluid passage in the housing 1, and the rear fluid director is coaxially arranged with the fluid passage.
The twin impeller assembly 4 is located within the turbine chamber of the fluid passageway. As shown in fig. 3, the dual impeller assembly 4 includes a first impeller 41, a second impeller 42, and an impeller shaft 43. One end of the impeller shaft 43 is rotatably connected to the front fluid director 2, and the other end is rotatably connected to the rear fluid director 3, and the three are coaxially arranged. Specifically, the impeller shaft 43 in the double-impeller assembly 4 is connected with the front deflector 2 or the rear deflector 3 through a bearing. The first impeller 41 and the second impeller 42 are identical turbines. The first impeller 41 and the second impeller 42 are arranged on the impeller shaft 43 in the same direction and in a sleeved mode at intervals, the impeller distance between the first impeller 41 and the second impeller is an expert experience value, and the following conditions are met: under the condition of the current impeller spacing, the balance coefficient of the fluid elastic disturbance generated between the adjacent impellers and the interference of the generated detectable electric signal is minimum. The first impeller 41 and the second impeller 42 are installed on the impeller shaft 43 with a phase difference in which the blades 412 are out of phase by 15 ° or more from the minimum detectable impeller rotational angle.
The detection probe 5 is positioned in the probe mounting groove 11; the inspection probe 5 includes a first probe 51 and a second probe 52. The first probe 51 and the second probe 52 are used for receiving feedback signals generated by the first impeller 41 and the second impeller 42 in the turbine cavity along with the movement of the fluid respectively. The distance and relative positional relationship between the first probe 51 and the first impeller 41 are completely the same as those between the second probe 52 and the second impeller 42. The detection probe 5 comprises a permanent magnet and a coil, the permanent magnet is used for generating a magnetic field near the corresponding impeller, and the coil is used for receiving a feedback signal generated by cutting magnetic induction lines of the magnetic field in the rotation process of the impeller in the double-impeller assembly 4.
The signal converter 6 is configured to obtain feedback signals received by the first probe 51 and the second probe 52, and output corresponding flow detection data according to the feedback signals. The data processing process of the signal converter 6 includes the following processes: the feedback signal obtained by one probe is used as a detection signal, and the other probe is used as a correction signal. Converting the detection signal and the correction signal into square wave pulses A and B respectively; the timer is started at each signal rising edge of the square wave pulse a and stopped at each nearest signal rising edge of the square wave pulse B, resulting in a time difference Ti. Comparing the time difference Ti with a preset time interval T, and making the following judgment and decision:
(1) when Ti belongs to T, judging that the current signal is a noise signal, and not counting the current pulse signal;
(2) when in use
And judging that the current signal is a non-noise signal, and counting the current pulse signal.
Finally, calculating and outputting a corresponding flow detection result Q according to the current meter coefficient K of the turbine flowmeter and the recorded pulse signal frequency f; wherein Q is K · f.
The present embodiment provides a turbine flowmeter that uses a dual impeller assembly 4 having two impellers with a specific phase difference, and a separate sensing probe 5 is provided for each impeller. The double-impeller assembly 4 is coaxially arranged in the use process, so that the two impellers can keep rotating in the same direction and at the same speed in the detection process. However, since the two impellers have a certain phase offset angle of the blades 412, the feedback signals of the cutting lines generated by the two impellers have a specific phase difference.
In this scenario, the present embodiment compares the two feedback signals acquired by the detection probe 5 with each other, and corrects them. When the flowmeter operates in a high electromagnetic interference environment, the two probes can obtain two paths of detection signals. According to the relation between the actual phase difference and the theoretical phase difference in the two paths of signals, the detection signals are subjected to specific signal processing, interference signals can be distinguished and eliminated, and only useful real signals are reserved. Thereby achieving the effects of anti-electromagnetic interference and automatic calibration; the detection accuracy and reliability of the turbine flowmeter in a complex electromagnetic environment are improved.
One technical key point of the scheme provided by the embodiment is the setting of the impeller distance between the two impellers. When the impeller distance between two impellers in the double-impeller assembly 4 is set to be too wide, obvious fluid disturbance can be caused between the two impellers, so that the final flow detection result is influenced, and the double-impeller assembly 4 can be seriously or even damaged. The solution of this embodiment is theoretically intended to set the distance between the two impellers small enough so that the double impeller assembly 4 can be nearly equivalent to a single impeller. However, in the practical application process, the distance between the impellers cannot be too small, so that the detection signals on the impellers need to be measured independently, and then two independent detection signals are generated for signal processing, so that the anti-interference effect is realized. When the distance between the impellers is too small, when the two probes detect the feedback signals on the respective corresponding impellers, interference occurs between the magnetic fields generated by the two probes, and the feedback signals acquired by the detection probe 5 are misaligned.
In addition, in the turbine flowmeter provided in the present embodiment, the impeller distance between the two impellers in the dual impeller assembly 4 is actually related to the number of the outer diameter blades 412 of the impellers, and these two parameters affect the fluid elastic disturbance effect generated in the fluid by the two impellers. Specifically, for the dual impeller assembly 4 in an ideal condition, the impeller spacing d is inversely related to the impeller outer diameter R and is positively related to the number n of blades 412 of each impeller.
In order to determine the optimal impeller spacing of the dual impeller assembly 4 in the turbine flowmeter, the present implementation also proposes a new digitization processing method. In this method, the optimum impeller spacing d between the two impellers is specified for a particular specification of the twin impeller assembly 4bestThe determination method comprises the following steps:
(1) fitting a response function eta (d) between a fluid elastic disturbance effect eta generated between the two impellers and an impeller distance d under a preset standard fluid environment;
(2) fitting a response function mu (d) between the interference effect mu of the feedback signals between the two impellers and the impeller distance d under the detection condition of the standard detection probe 5;
(3) calculating a balance coefficient phi between the fluid disturbance and the signal disturbance according to the following formula:
Φ(d)＝α·η(d)+β·μ(d)
in the above formula, α represents the weight of the influence of the fluid elastic disturbance effect on the detection accuracy of the flowmeter; beta represents the influence weight of the signal interference effect on the detection precision of the flowmeter;
(4) minimum value of calculated balance coefficient phiminThe corresponding impeller distance d is the optimal impeller distance d in the double-impeller assembly 4 with the current specificationbest。
After acquiring enough test data, the above method for determining the optimal impeller spacing can be obtained in a computer through corresponding software simulation. And produces the optimum impeller spacing for a twin impeller assembly 4 of any specification.
In the present embodiment, another factor affecting the detection accuracy of the turbine flowmeter is the phase deviation angle of the blade 412 between the two impellers in the dual impeller assembly 4. It is contemplated that too little phase skew of the vanes 412 will not allow the phase difference of the feedback signal between the two vanes 412 to be easily measured, and that too little phase skew of the vanes 412 will cause significant fluid drag between the two vanes 412. Therefore, the present embodiment makes the phase deviation angle θ of the blades 412 of the first impeller 41 and the second impeller 42 limited as follows:
wherein a represents the minimum detectable impeller rotation angle, in particular the minimum impeller rotation angle detectable by the detection probe 5 in the current turbine flowmeter; min {. is } represents taking a minimum function; n represents the number of blades 412 in each impeller. Under the state of the phase deflection angle of the blade 412, the reliability of the detection result in a complex electromagnetic environment can be ensured, and the detection precision of the turbine flowmeter can be obviously improved.
In the present embodiment, the outer diameter of the impeller in the rotational flowmeter is 40-50mm, and the number of the blades 412 of a single impeller is 8, so the impeller pitch in the dual impeller assembly 4 is set to 5mm, and the phase deviation angle of the blades 412 of the impeller is 15 °.
As shown in fig. 2, the probe installation groove 11 of the present embodiment includes a first groove and a second groove. A first probe 51 is located in the first slot and a second probe 52 is located in the second slot. The distance between the first groove and the second groove is determined according to the impeller distance between the first impeller 41 and the second impeller 42 in the double-impeller assembly 4; so as to satisfy: the first probe 51 and the second probe 52 which are arranged in the first groove and the second groove keep constant phase difference of detection signals or the phase difference meets the requirement of error limit under the standard detection state without magnetic field interference.
In order to facilitate the installation of the detection probe 5, the state problem of the detection probe 5 can be guaranteed in the using process, and the detection error caused by the shaking or the offset of the detection probe 5 is eliminated. In the embodiment, the detection probe 5 is assembled in the probe installation groove 11 by adopting a direct insertion type installation method, so that the structural connection between the detection probe 5 and the probe installation groove 11 is ensured to be firm. In addition, the stability and the anti-vibration effect of the turbine flowmeter are further improved. The embodiment also fixedly connects the detection probe 5 with the shell 1 through a locking bolt 7.
The housing 1 of the turbine flowmeter in the present embodiment should be made of a non-magnetic conductive material, specifically 304 stainless steel in the present embodiment, and in addition, other materials, such as a resin material, may be selected according to the corrosion resistance, structural strength, aging resistance, and cost of the specific application scenario, under the constraint of satisfying the non-magnetic conductivity. The blades 412 of the turbine flowmeter in this embodiment are made of a magnetically conductive material. Specifically, the present embodiment employs 440C stainless steel for the blades 412 in the dual turbine assembly.
In addition, in order to facilitate the installation and use of the turbine flowmeter, the present embodiment is provided with sealing flanges 13 for connecting pipes in the housing 1 at positions corresponding to the inlet and outlet ends of the fluid passage. In order to be convenient to adapt to different application scenes, the sealing flange 13 at the end part of the turbine flowmeter provided by the embodiment is assembled with the shell 1 in an exchangeable connection mode. Thereby being convenient for being matched with sealing flanges 13 with different specifications for use.
Example 2
The present embodiment provides a dual impeller assembly 4 for a tamper-resistant flowmeter, and the dual impeller assembly 4 is a key component in the turbine flowmeter in embodiment 1. The assembly requires very high structural dimensions and machining accuracy. Therefore, if the conventional precision machine tool is used for production, the difficulty of the machining process and the final machining cost are difficult to control. The present embodiment designs the required double impeller assembly 4 as a split-assembly product and as four different parts according to different structural features. And further the difficulty of the processing technology and the production cost can be greatly reduced.
Specifically, the dual impeller assembly 4 includes two identical impellers coaxially disposed with a specific blade 412 phase angle and a specific impeller spacing on the impeller shaft 43. The dual impeller assembly 4 is assembled by an assembly process. As shown in fig. 4, the parts of the twin impeller assembly 4 include: a first impeller 41, a second impeller 42, a positioning core sleeve 44 and an impeller shaft 43. Of the above four parts, the first impeller 41 and the second impeller 42 are conventional impeller products, and can be used in common with existing products. The impeller shaft 43 is also available in connection with existing products and is relatively difficult to machine if custom machining is required. The only part that requires special machining is the locating core sleeve 44. Although the positioning core sleeve 44 in this embodiment is a special component designed for the product of this embodiment, the difficulty of processing the component itself is low. And thus the production cost can be effectively controlled. The core technical feature of the positioning core sleeve 44 is the limitation of special specification and size for the characteristic tea grower. The requirement of 44-degree machining precision of the positioning core sleeve is high.
Aiming at the four parts, the assembly of the double-impeller component 4 can be completed by adopting a simple stamping process, so that the process difficulty is greatly reduced and the production cost is effectively controlled compared with the integrated product processing process. Aiming at the requirement of the processing technology, the impeller shaft 43 in the embodiment is in interference fit with the shaft mounting cavity 440 of the positioning core sleeve 44; the second section of the positioning core sleeve 44 is in interference fit with the inner hole of the second shaft sleeve 411; the first section of the positioning core sleeve 44 is in interference fit with the inner hole of the first shaft sleeve 411.
The first impeller 41 includes a first shaft sleeve 411 and blades 412 arranged on the first shaft sleeve 411 in a rotating array. The second impeller 42 includes a second hub 411 and blades 412. The second impeller 42 and the first impeller 41 have the same specifications except for the inner diameter of the shaft sleeve 411, and the inner diameter of the second shaft sleeve 411 is larger than that of the first shaft sleeve 411.
As shown in FIG. 5, the positioning core sleeve 44 contains a cylindrical shaft mounting cavity 440; the outer circumference of the positioning core sleeve 44 is divided into three sections along one end to the other end in a step-type reducing mode; wherein the outer circumference of the first section matches the inner diameter of said first hub 411. The outer circumference of the second section matches the inner diameter of the second bushing 411. The outer circumference of the third section is larger than the inner diameter of the second hub 411. The length of the first segment of the positioning core sleeve 44 is greater than the thickness of the first sleeve 411. The length of the second segment of the positioning core housing 44 is equal to the sum of the thickness of the second shaft housing 411 and the preset impeller spacing.
The impeller shaft 43 is an optical axis, and the outer diameter of the impeller shaft 43 is equal to the inner diameter of the shaft mounting cavity 440 of the positioning core sleeve 44. The upper and lower ends of the impeller shaft 43 are also chamfered for ease of installation.
Further, in the present embodiment, the first section of the positioning core housing 44 includes a straight cylindrical portion and a chamfered structure 441 portion with a tapered outer diameter at the front end of the straight cylindrical portion; the length of the straight cylindrical portion is equal to the width of the first sleeve 411; the total volume of the chamfered structure 441 portion is equal to the volume of the third segment of the positioning core sleeve 44.
In this embodiment, the chamfer structure 441 of the positioning core sleeve 44 has two functions: first, the structural assembly is facilitated, and the positioning core housing 44 having the chamfer is easily inserted into the boss 411 of each impeller. And plays a guiding role; the probability of part deformation and product scrapping caused by junction deviation in the machining process is reduced. Secondly, a structure identical to the third section of the positioning core sleeve 44 can be obtained through the deformation of the chamfering structure 441, so that the structural consistency of the two ends of the first impeller 41 and the second impeller 42 is maintained in the finished product, and a better flow detection effect is generated.
It should be noted that: the present embodiment produces the same nut-like structure by deforming chamfered structure 441 under pressure; this result is also beneficial for improving the structural stability and strength of the assembled assembly. Of course, in other embodiments, the turning after assembly may ensure that the structures on both sides of the first impeller 41 and the second impeller 42 are consistent.
In this embodiment, the first impeller 41, the second impeller 42, the positioning core housing 44 and the impeller shaft 43 are made of 440C stainless steel material subjected to heat treatment of hardness and strength. The material can meet the requirement of magnetic conductivity, and has good weather resistance, corrosion resistance and structural strength. In the present embodiment, in order to reduce the structural deformation of the twin-impeller assembly 4 during the machining process, the material is also subjected to heat treatment processing of hardness and strength.
The double-impeller component 4 provided in this embodiment is assembled by the following assembly method:
(1) coaxially placing the positioning core sleeve 44, the second impeller 42 and the first impeller 41 in sequence from top to bottom, and executing a first stamping action; so that the first impeller 41 snaps into the alignment core housing 44 at the intersection of the first and second segments and the second impeller 42 snaps into the alignment core housing 44 at the intersection of the second and third segments.
(2) Inserting the impeller shaft 43 into the assembly in the previous step at a position corresponding to the shaft mounting cavity 440 in the positioning core sleeve 44, and performing a second stamping action; so that the impeller shaft 43 penetrates the shaft mounting cavity 440 in the positioning core sleeve 44 and the portions of the impeller shaft 43 protruding at both ends of the positioning core sleeve 44 are of equal length.
(3) The assembly in the above step is placed in a jig, and the upper end and the lower end of the jig are provided with through holes matched with the impeller shaft 43; the impeller shaft 43 extends from the through hole, and the part of the jig corresponding to the chamfer structure 441 in the positioning core sleeve 44 comprises an extrusion groove which is the same as the third section structure in the positioning core sleeve 44.
(4) A third stamping action is performed on the jig of the previous step, so that the chamfered structure 441 is deformed into the same structure as the third section of the positioning core sleeve 44.
According to the description of the assembly process, the assembly process of the product provided by the embodiment is relatively simple, the assembly processing efficiency is good, personnel training is easy to carry out, and the assembly process is suitable for large-scale industrial automatic processing, so that the production cost of the product can be effectively reduced, and obvious economic benefits are generated.
In order to improve the yield of assembly and processing and reduce the overall production cost in the embodiment, the chamfer structure 441 of the positioning core sleeve 44 is locally annealed before processing, so that the hardness of the chamfer structure 441 part is reduced. And then after the assembly is finished, carrying out integral heat treatment and/or surface treatment according to the requirements of physical and chemical properties, and further obtaining the required final product of the double-impeller assembly 4. For example, the product can be subjected to finish machining to remove burrs, and the deformation rates of different structures are detected; quenching treatment is carried out, or other processing such as electroplating and polishing is carried out on the product, so that the comprehensive performance of the double-impeller assembly 4 is improved.
Example 3
In order to effectively improve the assembly efficiency of the twin-impeller unit 4 in embodiment 2, reduce assembly damage, and improve assembly accuracy and yield. The embodiment further provides a punching tool special for the double-impeller assembly 4.
The punching tool can adopt the parts in the embodiment 2, and the double-impeller component 4 meeting the requirements is processed through three times of punching actions. As shown in fig. 6 and 7, the press tool includes: platform 81, runing rest 82, punching press air hammer 83, core cover pressure equipment tool, axle pressure equipment tool and extrusion tool.
The rotating bracket 82 includes a bracket 821 and a rotating base 822. The support 821 comprises a vertical rod and a horizontal rod which are perpendicular to each other, and the vertical rod is fixedly arranged in the center of the platform 81 through a rotating base 822; the rotary base 822 is used for driving the support 821 to rotate and respectively stay at three different punching stations.
As shown in fig. 8, the core housing press-fitting jig is located outside the bracket 821 and just below the first punching station of the punching air hammer 83. The core sleeve press-fitting jig comprises a first positioning seat 841, a second positioning seat 842 and a first limiting guide rod 843. The first positioning seat 841 is fixedly installed on the surface of the platform 81. A first wheel groove for accommodating the first impeller 41 is arranged on the upper surface of the first positioning seat 841; the bottom of the first wheel groove is provided with a limit groove matched with the bottom profile of the first impeller 41. A plurality of first limiting guide rods 843 which extend vertically and upwards are arranged around the first positioning seat 841. The second positioning seat 842 has the same structure as the first positioning seat 841; the second positioning seat 842 is a split structure split along the longitudinal direction, and includes a left half seat and a right half seat. Limiting guide holes which are the same as the first limiting guide rod 843 in position and matched with the apertures are formed in the peripheries of the left half seat and the right half seat; the second positioning seat 842 is sleeved on the first limiting guide rod 843. The second positioning seat 842 is provided with a second wheel groove for accommodating the second impeller 42, and the bottom surface of the second wheel groove is also provided with a limit groove; and the limiting grooves in the first positioning seat 841 and the second positioning seat 842 deflect relatively, and the deflection angle is equal to the phase deflection angle of the preset blade 412. The thickness of the bottom of the second wheel groove in the second positioning seat 842 is equal to the preset impeller distance; the centers of the bottoms of the first positioning seat 841 and the second positioning seat 842 are provided with through holes with inner diameters not smaller than the outer diameter of the second section of the positioning core sleeve 44.
As shown in fig. 9, the shaft press-fitting jig is located outside the bracket 821 and just below the second press station of the press air hammer 83. The shaft press-fitting jig comprises a shaft limiting plate 851 and a wheel limiting seat 852; a plurality of second limiting guide rods 853 extending vertically upwards are arranged on the periphery of the wheel limiting seat 852, and limiting guide holes with the same positions as the second limiting guide rods 853 and matched apertures are arranged on the periphery of the shaft limiting plate 851; the shaft limit plate 851 is sleeved on the second limit guide rod 853. The shaft stopper plate 851 has a shaft through hole formed therein to match the outer diameter of the impeller shaft 43. The wheel limiting seat 852 is internally provided with an impeller groove matched with the combined profile of the first impeller 41, the second impeller 42 and the positioning core sleeve 44; the depth of the impeller groove is flush with the height of the assembly. The center of the bottom of the impeller groove is provided with a second shaft hole, the inner diameter of the second shaft hole is matched with the outer diameter of the impeller shaft 43, and the depth of the second shaft hole is equal to the length of the part of the impeller shaft 43 extending to the two sides of the impeller in the double-impeller assembly 4.
As shown in fig. 10, the pressing jig is located outside the bracket 821 and just below the third press station of the press air hammer 83. The extrusion jig comprises a fixed seat 851 and a movable seat 852. The base 851 is mounted on the platform 81 at the bottom; the upper portion of the fixing base 851 includes a first limiting groove, and the bottom of the first limiting groove is provided with an extrusion groove, and the extrusion groove is matched with the outer contour of the third section of the positioning core sleeve 44. The extrusion grooves are used for extruding the chamfered structure 441 at the bottom of the positioning core sleeve 44 into the same structure as the third section of the positioning core sleeve 44. A second shaft hole is further formed in the fixing seat 851 below the extrusion groove, the inner diameter of the second shaft hole is matched with the outer diameter of the impeller shaft 43, and the depth of the second shaft hole is equal to the length of the part of the impeller shaft 43, extending out of the two sides of the impeller, in the double-impeller assembly 4. The movable seat 852 is structurally symmetrical with the fixed seat 851 and is located above the fixed seat 851; the movable seat 852 is provided with a second limiting groove, and the total groove depth when the first limiting groove and the second limiting groove are combined is equal to the height of the combination of the first impeller 41, the second impeller 42 and the positioning core sleeve 44.
The working process of the stamping tool is as follows:
firstly, an operator or a manipulator places the first impeller 41 in the first positioning seat 841, and the first impeller 41 is engaged with the contour of the limiting groove in the first positioning seat 841; then, the split second positioning seat 842 is completely assembled and then inserted downwards along the first limiting guide rod 843, so that the second positioning seat 842 is close to the first positioning seat 841; then, the second impeller 42 is placed in the second positioning seat 842, and the second impeller 42 is engaged with the limiting groove in the second positioning seat 842. Finally, the positioning core sleeve 44 is inserted into the inner hole of the shaft sleeve 411 of the second impeller 42. And then, the initialization of the core sleeve press-fitting jig is completed.
Next, the rotary frame 82 rotates the ram air hammer 83 to the first press station, and the press head 832 presses downward to perform the first press operation. The positioning core housing 44 is pressed into the first impeller 41 and the second impeller 42, and the first impeller 41 is snapped into the positioning core housing 44 at the intersection of the first segment and the second segment, and the second impeller 42 is snapped into the positioning core housing 44 at the intersection of the second segment and the third segment.
After the first punching operation is completed, the punching head 832 is lifted, and an operator or a robot takes the combined body of the second positioning seat 842 off from the upper side of the second spacing guide rod 853, detaches the left half seat and the right half seat in the first positioning seat 841, and takes the first combined body of the assembled first impeller 41, the assembled second impeller 42 and the assembled positioning core sleeve 44 off. Meanwhile, the shaft limiting plate 851 in the shaft press-fitting jig is detached, and the first assembly is placed in the impeller groove in the wheel limiting seat 852. Then, the shaft stopper plate 851 is re-inserted into the second stopper guide 853 while the impeller shaft 43 is inserted into the shaft stopper plate 851, and the lower end of the impeller shaft 43 is inserted into the upper opening of the positioning core 44 while the impeller shaft 43 is coaxially and vertically aligned with the first assembly below. And finishing the initialization of the shaft press-fitting jig.
In addition, in order to further prevent the impeller shaft 43 from being bent or broken due to the position deviation during the execution of the second punching operation, the height of the punching head 832 may be appropriately lowered so that the first shaft hole in the punching head 832 is sleeved on the impeller shaft 43.
Then the rotary bracket 82 rotates the punching air hammer 83 to the second punching station; the punch 832 is depressed to perform a second punching action so that the impeller shaft 43 extends through the shaft mounting cavity 440 in the positioning core housing 44 and the portions of the impeller shaft 43 extending at both ends of the positioning core housing 44 are of equal length. After the second stamping action is completed, the stamping head 832 is raised. The operator or the robot removes the shaft stopper plate 851 and removes the second combination of the first combination of the impeller shafts 43 having been assembled.
Then, the movable seat 852 in the extrusion jig is removed, the second assembly is sent into the first limit groove of the fixed seat 851 in the extrusion jig, and then the movable seat 852 is covered, so that the upper and lower extending parts of the impeller shaft 43 in the second assembly are just inserted into the second shaft holes in the fixed seat 851 and the movable seat 852. And finishing the initialization of the pressurizing jig.
Next, the punch 832 presses down for the third time to complete the third punching operation; deforming the chamfered structure 441 into the same structure as the third segment of the positioning core sleeve 44. After the punching operation is completed, the punching head 832 is lifted, and the operator or the robot removes the movable part to take out the assembled dual impeller assembly 4.
In this embodiment, when the platform 81 is used as a polar coordinate plane and the mounting point of the bracket 821 is used as a pole, the adjacent polar angles among the first stamping station, the second stamping station and the third stamping station are 120 °, and the pole diameters from the center point to the pole of the three stamping stations are equal; and the three punching stations are sequentially arranged according to a preset clockwise or anticlockwise sequence.
The punching tool comprises a controller, and the controller is used for controlling the rotating base 822 to rotate 120 degrees at each time, so that the three punching stations are sequentially switched.
The pressure value and the stamping depth of the stamping air hammer 83 during stamping action execution on three stamping stations are different, and the controller is also used for controlling the stamping air hammer 83 to circularly switch the pressure value and the stamping depth of each stamping action, so that stamping action execution on different stamping stations according to the preset pressure value and the stamping depth corresponding to each station is realized.
The punching machine in the embodiment is used as semi-automatic equipment, the parameters of each punching are automatically set by control, and after the initialization of each jig is completed, operators of other equipment issue punching instructions to the controller.
In this embodiment, the periphery of the fixed seat 851 is provided with a plurality of third limiting guide rods extending vertically upwards, and the periphery of the movable seat 852 is provided with limiting guide holes which have the same positions as the third limiting guide rods and are matched with the apertures; the movable seat 852 is sleeved on the third limiting guide rod.
The peripheries of the first positioning seat 841, the second positioning seat 842, the shaft limiting plate 851, the wheel limiting seat 852, the fixed seat 851 and the movable seat 852 are all provided with connecting lugs which protrude outwards and are used for connecting limiting guide rods. And the first positioning seat 841 corresponds to the position of the connecting lug on the second positioning seat 842. The shaft stopper plate 851 corresponds to the position of the engaging lug on the wheel stopper seat 852. The fixed seat 851 corresponds to the position of the engaging lug on the movable seat 852. The connecting lug on the first positioning seat 841 is fixedly connected with the first limit guide rod 843. The engaging lug of the wheel limiting seat 852 is fixedly connected with the second limiting guide rod 853. The engaging lug on the fixing base 851 is fixedly connected with the third limiting guide rod. Limiting guide holes for the first limiting guide rod 843, the second limiting guide rod 853 or the third limiting guide rod to penetrate through are formed in connecting lugs in the second positioning seat 842, the shaft limiting plate 851 and the movable seat 852.
The tops of the first limiting guide rod 843, the second limiting guide rod 853 and the third limiting guide rod are provided with conical tips with gradually reduced outer diameters.
The rod bodies of the first limit guide rod 843 and the second limit guide rod 853 are also sleeved with return springs.
This embodiment is through setting up corresponding spacing guide arm outside each tool, restricts the direction of motion in the tool stamping process, avoids appearing the skew and leads to the product to scrap. Meanwhile, the reset spring can reset the jig again after the punching is finished every time, so that an operator or a mechanical arm can take out finished products or semi-finished products assembled in the jig conveniently.
Considering that the second positioning seat 842 needs to be assembled and disassembled frequently during the use process, in the present embodiment, handles protruding outwards are disposed on the outer sides of the left half seat and the right half seat in the second positioning seat 842. The second positioning seat 842 can be conveniently taken down from the core sleeve press-fitting jig.
Meanwhile, the positions of the abutting surfaces of the left half seat and the right half seat are provided with locking bodies for alignment, and each locking body comprises a lock tongue and a lock groove which are respectively arranged on the left half seat and the right half seat. The second positioning seat 842 can be assembled conveniently through the lock tongue and the lock groove structure, so that the assembling precision of the second positioning seat and the second positioning seat is ensured. Meanwhile, the second positioning seat 842 is prevented from being loosened in the stamping process, and the assembly precision of the product is effectively improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A punching tool for a double-impeller assembly is used for assembling the double-impeller assembly, the double-impeller assembly comprises two identical impellers which are coaxially arranged, and the two impellers have a specific blade phase deflection angle and a specific impeller interval on an impeller shaft; the parts of the double-impeller component comprise a first impeller, a second impeller, a positioning core sleeve and an impeller shaft; the first impeller comprises a first shaft sleeve and blades which are arranged on the first shaft sleeve in a rotating array mode; the second impeller comprises a second shaft sleeve and a blade; the specifications of the second impeller and the first impeller except the inner diameter of the shaft sleeve are completely the same, and the inner diameter of the second shaft sleeve is larger than that of the first shaft sleeve; the positioning core sleeve is internally provided with a cylindrical shaft mounting cavity; the outer circumference of the positioning core sleeve is divided into three sections along one end to the other end in a step type reducing mode; the outer diameter of the first section is matched with the inner diameter of the first shaft sleeve; the outer circumference of the second section is matched with the inner diameter of the second shaft sleeve; the outer diameter of the third section is larger than the inner diameter of the second shaft sleeve; the first section of the positioning core sleeve comprises a straight cylinder part and a chamfer structure part with a gradually reduced outer diameter positioned at the front end of the straight cylinder part; the length of the straight cylinder part is equal to the width of the first shaft sleeve; the total volume of the chamfer structure part is equal to the volume of the third section in the positioning core sleeve; the length of the second section in the positioning core sleeve is equal to the sum of the thickness of the second shaft sleeve and the preset impeller distance; the outer diameter of the impeller shaft is equal to the inner diameter of the positioning core sleeve central shaft installation cavity;
its characterized in that, the punching press frock includes:
a platform, a plurality of movable plates and a plurality of movable plates,
the rotary bracket comprises a bracket and a rotary base; the support comprises a vertical rod and a cross rod which are vertical to each other, and the vertical rod is fixedly arranged in the center of the platform through a rotating base; the rotary base is used for driving the support to rotate and respectively stays at three different stamping stations;
the stamping air hammer comprises a hammer body and a stamping head; the stamping air hammer is arranged below the cross rod; the punching head of the punching air hammer is in a cake shape, and the pressing direction is downward; a first shaft hole is formed in the center of the stamping head, and the inner diameter of the first shaft hole is matched with the outer diameter of the impeller shaft;
the core sleeve press-mounting jig is positioned on the outer side of the bracket and just below the first stamping station of the stamping air hammer; the core sleeve press-mounting jig comprises a first positioning seat, a second positioning seat and a first limiting guide rod; the first positioning seat is fixedly arranged on the surface of the platform; a first wheel groove for accommodating a first impeller is formed in the upper surface of the first positioning seat; the bottom of the first wheel groove is provided with a limit groove matched with the bottom profile of the first impeller; a plurality of first limiting guide rods extending vertically upwards are arranged on the periphery of the first positioning seat; the second positioning seat has the same structure as the first positioning seat; the second positioning seat is of a split structure which is split along the longitudinal direction and comprises a left half seat and a right half seat; the peripheries of the left half seat and the right half seat are provided with limiting guide holes which have the same positions as the first limiting guide rods and are matched with the first limiting guide rods in hole diameter; the second positioning seat is sleeved on the first limiting guide rod, a second wheel groove for accommodating a second impeller is formed in the second positioning seat, and a limiting groove is also formed in the bottom surface of the second wheel groove; the limiting grooves in the first positioning seat and the second positioning seat deflect relatively, and the deflection angle is equal to a preset blade phase deflection angle; the thickness of the bottom of a second wheel groove in the second positioning seat is equal to the preset impeller distance; through holes with the inner diameter not smaller than the outer diameter of the second section in the positioning core sleeve are formed in the centers of the bottoms of the first positioning seat and the second positioning seat;
the shaft press-mounting jig is positioned on the outer side of the bracket and just below a second stamping station of the stamping air hammer; the shaft press-fitting jig comprises a shaft limiting plate, a wheel limiting seat and a second limiting guide rod; a plurality of second limiting guide rods extending vertically upwards are arranged on the periphery of the wheel limiting seat, and limiting guide holes which are identical to the second limiting guide rods in position and are matched with the second limiting guide rods in hole diameter are arranged on the periphery of the shaft limiting plate; the shaft limiting plate is sleeved on the second limiting guide rod; the shaft limiting plate comprises a shaft through hole matched with the outer diameter of the impeller shaft; the wheel limiting seat is internally provided with an impeller groove matched with the profile of the combination of the first impeller, the second impeller and the positioning core sleeve; the depth of the impeller groove is flush with the height of the assembly; a second shaft hole is formed in the center of the bottom of the impeller groove, the inner diameter of the second shaft hole is matched with the outer diameter of the impeller shaft, and the depth of the second shaft hole is equal to the length of a part of the impeller shaft extending out of two sides of the impeller in the double-impeller assembly; and
the extrusion jig is positioned on the outer side of the support and just below a third stamping station of the stamping air hammer; the extrusion jig comprises a fixed seat and a movable seat; the bottom surface of the fixed seat is arranged on the platform; the upper part of the fixed seat is provided with a first limiting groove, the bottom of the first limiting groove is provided with an extrusion groove, and the extrusion groove is matched with the outer contour of the third section in the positioning core sleeve; the extrusion groove is used for extruding the chamfer structure at the bottom of the positioning core sleeve into a structure which is the same as the third section of the positioning core sleeve; a second shaft hole is further formed below the extrusion groove in the fixing seat, the inner diameter of the second shaft hole is matched with the outer diameter of the impeller shaft, and the depth of the second shaft hole is equal to the length of a part of the impeller shaft extending out of two sides of the impeller in the double-impeller assembly; the movable seat and the fixed seat are structurally symmetrical and are positioned above the fixed seat; and a second limiting groove is arranged in the movable seat, and the total groove depth when the first limiting groove and the second limiting groove are combined is equal to the height of the combination of the first impeller, the second impeller and the positioning core sleeve.
2. The punching tool of the double-impeller assembly of claim 1, characterized in that: when the platform is taken as a polar coordinate plane and the mounting point of the bracket is taken as a pole, the adjacent polar angles among the first stamping station, the second stamping station and the third stamping station are 120 degrees, and the pole diameters from the center point to the pole of the three stamping stations are equal; and the three punching stations are sequentially arranged according to a preset clockwise or anticlockwise sequence.
3. The twin impeller assembly punch tooling of claim 2, wherein: the punching tool comprises a controller, wherein the controller is used for controlling the rotary base to rotate 120 degrees at each time, and then the three punching stations are sequentially switched.
4. The double-impeller assembly punching tool of claim 3, characterized in that: the controller is also used for controlling the punching air hammer to circularly switch the pressure value and the punching depth of each punching action, and then the punching action is executed on different punching stations according to the preset pressure value and the punching depth corresponding to each station.
5. The punching tool of the double-impeller assembly of claim 1, characterized in that: a plurality of third limiting guide rods extending vertically upwards are arranged on the periphery of the fixed seat, and limiting guide holes which are the same as the third limiting guide rods in position and are matched with the third limiting guide rods in hole diameter are arranged on the periphery of the movable seat; the movable seat is sleeved on the third limiting guide rod.
6. The twin impeller assembly punch tooling of claim 5, wherein: the peripheries of the first positioning seat, the second positioning seat, the shaft limiting plate, the wheel limiting seat, the fixed seat and the movable seat are respectively provided with a connecting lug which protrudes outwards and is used for connecting a limiting guide rod; the first positioning seat corresponds to the connecting lug on the second positioning seat in position; the position of the shaft limiting plate corresponds to the position of the connecting lug on the wheel limiting seat; the positions of the fixed seat and the connecting lug on the movable seat correspond to each other; the connecting lug on the first positioning seat is fixedly connected with the first limiting guide rod; the connecting lug of the wheel limiting seat is fixedly connected with the second limiting guide rod; the connecting lug on the fixed seat is fixedly connected with the third limiting guide rod; and limiting guide holes for the first limiting guide rod, the second limiting guide rod or the third limiting guide rod to penetrate through are formed in the second positioning seat, the shaft limiting plate and the connecting lugs in the movable seat.
7. The twin impeller assembly punch tooling of claim 5, wherein: the tops of the first limiting guide rod, the second limiting guide rod and the third limiting guide rod are provided with conical tips with gradually reduced outer diameters.
8. The double-impeller assembly punching tool of claim 7, characterized in that: and the rod bodies of the first limiting guide rod and the second limiting guide rod are also sleeved with return springs.
9. The punching tool of the double-impeller assembly of claim 1, characterized in that: in the second positioning seat, the outer sides of the left half seat and the right half seat are provided with handles protruding outwards.
10. The twin impeller assembly punch tooling of claim 9, wherein: the locking body for alignment is arranged at the position of the joint surface of the left half seat and the right half seat, and comprises a lock tongue and a lock groove which are respectively arranged on the left half seat and the right half seat.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111672819.9A CN114309334B (en) | 2021-12-31 | 2021-12-31 | Stamping tool for double-impeller assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111672819.9A CN114309334B (en) | 2021-12-31 | 2021-12-31 | Stamping tool for double-impeller assembly |
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| CN114309334A true CN114309334A (en) | 2022-04-12 |
| CN114309334B CN114309334B (en) | 2023-09-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279511A (en) * | 2021-12-31 | 2022-04-05 | 安徽省锐凌计量器制造有限公司 | Double-impeller assembly for flowmeter and assembling method thereof |
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| CN109454142A (en) * | 2018-12-26 | 2019-03-12 | 范利玛 | Stamping equipment is used in a kind of processing of closed impeller formula all-in-one machine water pump |
| CN211727193U (en) * | 2019-12-15 | 2020-10-23 | 盐城市茂达机械制造有限公司 | Impeller stamping forming die |
| CN113172142A (en) * | 2021-05-26 | 2021-07-27 | 江苏拓明机械制造有限公司 | Automatic production line for impeller stamping production |
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| KR20060033477A (en) * | 2004-10-15 | 2006-04-19 | 하남전기주식회사 | Auto impellar assembly machine |
| CN106541010A (en) * | 2016-10-27 | 2017-03-29 | 安徽新荣钢构有限公司 | A kind of impeller fast ram device |
| CN109454142A (en) * | 2018-12-26 | 2019-03-12 | 范利玛 | Stamping equipment is used in a kind of processing of closed impeller formula all-in-one machine water pump |
| CN211727193U (en) * | 2019-12-15 | 2020-10-23 | 盐城市茂达机械制造有限公司 | Impeller stamping forming die |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114279511A (en) * | 2021-12-31 | 2022-04-05 | 安徽省锐凌计量器制造有限公司 | Double-impeller assembly for flowmeter and assembling method thereof |
| CN114279511B (en) * | 2021-12-31 | 2024-07-02 | 安徽省锐凌计量器制造有限公司 | Double-impeller assembly for flowmeter and assembly method thereof |
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|---|---|
| CN114309334B (en) | 2023-09-26 |
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