Positioning mandrel for machining flat-hole curved-surface impeller

Abstract

The utility model discloses a positioning mandrel for processing a flat-hole curved-surface impeller, which is used for processing the flat-hole curved-surface impeller, the flat-hole curved-surface impeller comprises a central connecting shaft, an integrally connected conical ring plate is arranged in the middle of the outer side of the central connecting shaft, and the section of the conical ring plate is of an arc-shaped structure. Integrally connected impeller blades are uniformly arranged on the outer side of the conical annular plate, the center connecting shaft comprises a center shaft, a mounting flat hole is formed in the center of the center shaft, the positioning mandrel for machining the flat hole curved surface impeller comprises a supporting shaft, and the diameter of the supporting shaft is larger than that of the outer side of the conical annular plate; an integrally-connected clamping head is arranged at one end of the supporting shaft, a positioning inserting shaft fixed to the center shaft is arranged in the center of the other end of the supporting shaft, and the impeller structure is integrally connected, so that the strength of a produced impeller is higher, fixing is faster when the impeller is machined, and therefore the machining speed is increased; and the end face of the impeller is prevented from being crushed during fixing.

Description

Technical Field

[0001] The utility model relates to the technical field of impeller processing, in particular to a positioning mandrel for processing a flat hole curved surface impeller. Background Art

[0002] Curved impellers are often used in centrifugal pump products to drive the medium and are the main working components. Under the action of the impeller blades, the fluid rotates at high speed with the impeller. The fluid is affected by the rotating centrifugal force and the expansion pressure flow in the impeller, which increases the pressure after passing through the impeller. When processing the impeller, the impeller needs to be fixed to a five-axis machine tool and then the workpiece is cut. It is easy to cause pressure damage to the impeller when the workpiece is fixed. In addition, it is inconvenient to determine the position of the chips when processing the impeller. After each blade is processed, the position of the chips needs to be re-determined, the processing speed is slow, and it is inconvenient to use. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a positioning core shaft for processing a flat hole curved impeller. The structure is simple and easy to operate. The impeller structure adopts an integrated connection, so that the produced impeller has higher strength and can be fixed more quickly during impeller processing, thereby improving the processing speed. In addition, the impeller end face is avoided from being crushed during fixation, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positioning mandrel for machining a flat hole curved surface impeller, which is used for machining a flat hole curved surface impeller, wherein the flat hole curved surface impeller comprises a central connecting shaft, an integrally connected conical ring plate is arranged in the middle of the outer side of the central connecting shaft, the cross section of the conical ring plate is an arc structure, and the outer side of the conical ring plate is evenly provided with integrally connected impeller blades, the central connecting shaft comprises a central shaft, and a mounting flat hole is arranged in the center of the central shaft;

[0005] The positioning core shaft for machining the flat-hole curved impeller comprises a supporting shaft, the diameter of the supporting shaft being larger than the outer diameter of the conical ring plate, one end of the supporting shaft being provided with an integrally connected clamping head, the center of the other end of the supporting shaft being provided with a positioning plug-in shaft fixed to the central shaft, the cross-section of the positioning plug-in shaft being the same as that of the mounting flat hole, the center of the end of the positioning plug-in shaft away from the support shaft being provided with an integrally connected threaded column, the outer side of the threaded column being provided with a nut for fixing the impeller to one end of the positioning supporting shaft, and a machining reference plane being provided on the side of the end of the supporting shaft close to the positioning plug-in shaft.

[0006] Furthermore, a nylon washer is provided between the nut and the central shaft, and the nylon washer prevents the nut from directly contacting the central shaft and causing crushing.

[0007] Furthermore, an annular groove is provided at one end of the support shaft, and a gap is provided between the inner bottom surface of the annular groove and the central axis, so that when the impeller is installed, one end of the conical ring plate is fit with the end of the support shaft, and the annular groove can prevent one end of the central shaft from contacting with the positioning support shaft and causing damage.

[0008] Compared with the prior art, the beneficial effects of the utility model are as follows: the center connecting shaft, the conical ring plate and the impeller blades are integrally formed to make the impeller stronger. When processing the impeller, the center shaft is first sleeved onto the outside of the positioning plug-in shaft, and then the impeller is pressed to one end of the positioning support shaft through a nylon washer and a nut. The flat hole is installed to the outside of the positioning plug-in shaft to prevent the impeller and the support shaft from rotating, and at the same time, it is ensured that the impeller rotates with the support shaft. During installation, the annular groove is used to avoid damage to one end of the center shaft from contacting the positioning support shaft, and the nylon washer is used to avoid direct contact between the nut and the center shaft to cause crushing. The positioning core shaft used for processing the flat hole curved impeller has a simple structure and is easy to operate. The impeller structure is integrally connected, so that the produced impeller has higher strength and can be fixed more quickly during impeller processing, thereby improving the processing speed and avoiding crushing of the impeller end face during fixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the impeller processing and installation structure of the utility model;

[0010] Figure 2 This is a right view structural diagram of the impeller processing and installation of the utility model;

[0011] Figure 3 This is a schematic diagram of the impeller structure of the utility model;

[0012] Figure 4 This is a schematic diagram of the support shaft structure of the utility model.

[0013] In the figure: 1 center connecting shaft, 11 center shaft, 12 mounting flat hole, 2 conical ring plate, 3 impeller blades, 4 supporting shaft, 5 clamping head, 6 positioning plug-in shaft, 7 threaded column, 8 nut, 9 nylon washer, 10 annular groove, 101 processing reference plane. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] See also Figure 1-3The utility model provides a technical solution: a positioning mandrel for machining a flat hole curved surface impeller, which is used for machining a flat hole curved surface impeller. The flat hole curved surface impeller comprises a central connecting shaft 1, an integrally connected conical ring plate 2 is arranged in the middle of the outer side of the central connecting shaft 1, the cross section of the conical ring plate 2 is an arc structure, and the outer side of the conical ring plate 2 is evenly provided with integrally connected impeller blades 3, the central connecting shaft 1 comprises a central shaft 11, and a mounting flat hole 12 is arranged in the center of the central shaft 11;

[0016] The positioning core shaft for machining the flat-hole curved impeller includes a support shaft 4, the diameter of the support shaft 4 is larger than the outer diameter of the conical ring plate 2, one end of the support shaft 4 is provided with an integrally connected clamping head 5, the other end center of the support shaft 4 is provided with a positioning plug-in shaft 6 fixed to the center axis 11, the cross-section of the positioning plug-in shaft 6 is the same as that of the mounting flat hole 12, the center of the end of the positioning plug-in shaft 6 away from the support shaft 4 is provided with an integrally connected threaded column 7, the outer side of the threaded column 7 is provided with a nut 8 for fixing the impeller to one end of the positioning support shaft 4, and a machining reference plane 101 is provided on the side of the end of the support shaft 4 close to the positioning plug-in shaft 6, and the position of the impeller blade 3 during chip machining can be positioned by the machining reference plane 101, so as to facilitate the alignment during impeller machining, so as to align the angular direction of the impeller blade 3, and to be sleeved onto the outer side of the positioning plug-in shaft 6 through the mounting flat hole 12. To prevent the impeller and the support shaft 4 from rotating, and to ensure that the impeller rotates with the support shaft 4 when the support shaft 4 rotates, a nylon washer 9 is provided between the nut 8 and the center shaft 11, and the nylon washer 9 prevents the nut 8 from directly contacting the center shaft 11 and causing crushing. An annular groove 10 is provided at one end of the support shaft 4, and a gap is provided between the inner bottom surface of the annular groove 10 and the center shaft 11, so that when the impeller is installed, one end of the conical ring plate 2 is fitted with the end of the support shaft 4, and the annular groove 10 prevents one end of the center shaft 11 from contacting the positioning support shaft 4 and causing damage. The positioning mandrel for processing the flat hole curved surface impeller has a simple structure and is easy to operate. The impeller structure adopts an integrated connection, which makes the produced impeller stronger and can be fixed faster during impeller processing, thereby improving the processing speed and avoiding crushing of the impeller end face during fixing.

[0017] During use: the center connecting shaft 1, the conical ring plate 2 and the impeller blades 3 are integrally formed to make the impeller stronger. When processing the impeller, firstly, the center shaft 11 is sleeved onto the outside of the positioning plug-in shaft 6, and then the impeller is pressed to one end of the positioning support shaft 4 through the nylon washer 9 and the nut 8. The installation flat hole 12 is sleeved onto the outside of the positioning plug-in shaft 6 to prevent the impeller and the support shaft 4 from rotating, and at the same time ensure that the impeller rotates with the support shaft 4. During installation, the annular groove 10 is used to prevent one end of the center shaft 11 from contacting with the positioning support shaft 4 to cause damage, and the nylon washer 9 is used to prevent the nut 8 from directly contacting with the center shaft 11 to cause pressure injuries.

[0018] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A positioning mandrel for machining a flat hole curved surface impeller, used for machining a flat hole curved surface impeller, the flat hole curved surface impeller comprising a central connecting shaft (1), an integrally connected conical ring plate (2) is arranged in the middle of the outer side of the central connecting shaft (1), the cross section of the conical ring plate (2) is an arc structure, and the outer side of the conical ring plate (2) is evenly provided with integrally connected impeller blades (3), the central connecting shaft (1) comprises a central shaft (11), the center of the central shaft (11) is provided with a mounting flat hole (12), characterized in that: A positioning mandrel for machining a flat hole curved impeller comprises a support shaft (4), the diameter of the support shaft (4) being larger than the outer diameter of a conical ring plate (2), one end of the support shaft (4) being provided with an integrally connected clamping head (5), the other end of the support shaft (4) being provided with a positioning plug-in shaft (6) fixed to a central shaft (11), the cross section of the positioning plug-in shaft (6) being the same as that of a mounting flat hole (12), the center of the end of the positioning plug-in shaft (6) away from the support shaft (4) being provided with an integrally connected threaded column (7), the outer side of the threaded column (7) being provided with a nut (8) for fixing the impeller to one end of the positioning support shaft (4), and a machining reference plane (101) being provided on the side surface of one end of the support shaft (4) close to the positioning plug-in shaft (6).

2. The positioning mandrel for machining a flat hole curved surface impeller according to claim 1, characterized in that: A nylon washer (9) is provided between the nut (8) and the central shaft (11).

3. The positioning mandrel for machining a flat hole curved surface impeller according to claim 1, characterized in that: An annular groove (10) is provided at one end of the support shaft (4), and a gap is provided between the inner bottom surface of the annular groove (10) and the central shaft (11), thereby making one end of the conical ring plate (2) fit with the end of the support shaft (4) when the impeller is installed.

Images