A device and method for machining cone surface of engine cooling water pump impeller

Abstract

The invention discloses a conical surface processing device and method for an engine cooling water pump impeller; the bottom of the positioning mandrel is assembled in the fourth through groove on the fixture connection plate by interference fit, and the positioning mandrel is limited by the annular boss on the side of the positioning mandrel in the third through groove; the positioning cone sleeve is assembled on the spherical bearing by interference fit, and the positioning mandrel passes through the middle of the positioning cone sleeve; the spherical bearing is assembled in the second through groove on the fixture connection plate by interference fit, and the coaxiality of the positioning mandrel and the positioning cone sleeve is ensured by the fixture connection plate; the fifth through groove at the bottom of the fixture connection plate is used to be concentrically connected with the lathe spindle, and the workpiece to be processed is kept concentric with the lathe spindle through the top of the positioning mandrel, and the clamping nut is connected to the upper side of the fixture connection plate by thread, and the impeller of the workpiece to be processed is pressed by the end face and the profiling part of the clamping nut. The processing accuracy and processing efficiency of the cone surface angle, cone surface height and cone surface runout of the engine cooling water pump stamping impeller are improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile engine cooling water pumps, and in particular to a device and method for machining a conical surface of an engine cooling water pump impeller. Background Art

[0002] The automobile engine cooling water pump is the heart of the automobile engine cooling system. Its function is to increase the working pressure of the coolant in the circulation system, maintain the coolant circulation between the engine-related components, and prevent the engine from running at too high a temperature. According to the different supporting requirements and working conditions, the engine cooling water pump structure types include centrifugal pumps, vortex pumps, and rotary positive displacement pumps. Due to the limitation of space size, a single-stage centrifugal pump consisting of a water inlet chamber, an impeller, and a water outlet chamber is usually used. This structure has the characteristics of small size, light weight, large water supply, and simple structure. It is the most widely used structural type. The typical centrifugal cooling circulation water pump is mainly composed of a pump body, an impeller, a bearing, a water seal, and a pulley. The working environment of the engine cooling water pump is harsh and the space is extremely limited. In order to avoid disassembly and maintenance during the overhaul period, the working life of the water pump should be equal to or multiple of the engine overhaul period. For the engine cooling water pump and its components, such as the impeller, the reliability requirements are extremely high, and the precision and quality of manufacturing and processing need to be guaranteed. Summary of the invention

[0003] In order to overcome the above-mentioned defects, the purpose of the present invention is to provide a device and method for processing the conical surface of an engine cooling water pump impeller, so as to improve the processing accuracy and efficiency of the conical surface angle, conical surface height and conical surface runout of the engine cooling water pump stamping impeller.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] An engine cooling water pump impeller conical surface processing device comprises a positioning mandrel, a positioning cone sleeve, a spherical bearing, a clamping nut and a fixture connecting plate; the middle part of the fixture connecting plate is provided with a first through groove, a second through groove, a third through groove, a fourth through groove and a fifth through groove in sequence from top to bottom; the first through groove, the second through groove, the third through groove, the fourth through groove and the fifth through groove are cylindrical through grooves with different diameters; the bottom of the positioning mandrel is assembled in the fourth through groove on the fixture connecting plate by interference fit, and is limited by the annular boss on the side of the positioning mandrel in the third through groove; the positioning cone sleeve is The spherical bearing is assembled on the said spherical bearing by interference fit, and the said positioning spindle passes through the middle part of the said positioning cone sleeve; the said spherical bearing is assembled in the second through groove on the said fixture connecting plate by interference fit, and the coaxiality of the said positioning spindle and the said positioning cone sleeve is ensured by the said fixture connecting plate; the fifth through groove at the bottom of the said fixture connecting plate is used to be connected concentrically with the lathe spindle, and the workpiece to be processed is kept concentric with the lathe spindle through the top of the said positioning spindle, and the said clamping nut is connected to the upper side of the said fixture connecting plate by threads, and the impeller of the workpiece to be processed is clamped by the end face and the contoured part of the clamping nut.

[0006] A method for machining a conical surface of an engine cooling water pump impeller, using the above-mentioned engine cooling water pump impeller conical surface machining device, comprises the following steps:

[0007] Connect the aforementioned engine cooling water pump impeller conical surface processing device to the lathe spindle through the fixture connection plate, and calibrate the concentricity at the same time;

[0008] The workpiece to be processed is determined to have a unique position and posture through the positioning mandrel and the positioning cone sleeve;

[0009] The workpiece to be processed is fitted with a compression nut through the contoured part, and the workpiece is compressed through threaded connection;

[0010] The lathe spindle is rotated to lock the workpiece with the clamping nut, and the cutting process begins.

[0011] The positive and beneficial effects of the present invention are as follows: the processing accuracy and efficiency of the cone angle, cone height and cone runout of the engine cooling water pump stamping impeller are improved through thread self-locking and concentric positioning; the method is simple, the quality and efficiency are improved, and the qualified rate of the impeller size is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a front cross-sectional schematic diagram of a conical surface machining device for an engine cooling water pump impeller provided in Embodiment 1 of the present invention;

[0013] Figure 2 It is a top view schematic diagram of an engine cooling water pump impeller conical surface processing device provided in Example 1 of the present invention. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with some specific implementation methods. Example

[0015] like Figure 1 and Figure 2 As shown, a conical surface processing device for an engine cooling water pump impeller 11 comprises a positioning mandrel 1, a positioning taper sleeve 2, a spherical bearing 3, a clamping nut 4 and a fixture connecting plate 5; the middle part of the fixture connecting plate 5 is provided with a first through groove 6, a second through groove 7, a third through groove 8, a fourth through groove 9 and a fifth through groove 10 in sequence from top to bottom; the first through groove 6, the second through groove 7, the third through groove 8, the fourth through groove 9 and the fifth through groove 10 are cylindrical through grooves with different diameters; the bottom of the positioning mandrel 1 is assembled in the fourth through groove 9 on the fixture connecting plate 5 by interference fit, and is limited by the annular boss on the side of the positioning mandrel 1 in the third through groove 8, and the diameter of the annular boss is larger than the diameter of the fourth through groove 9 to prevent the mandrel from sinking excessively; the positioning taper sleeve 2 is The spherical bearing 3 is assembled by interference fit, and the positioning mandrel 1 passes through the middle of the positioning cone sleeve 2; the spherical bearing 3 is assembled in the second through groove 7 on the fixture connection plate 5 by interference fit, and is stuck on the top of the third through groove 8, and the coaxiality of the positioning mandrel 1 and the positioning cone sleeve 2 is ensured by the fixture connection plate 5; the fifth through groove 10 at the bottom of the fixture connection plate 5 is used to be concentrically connected with the lathe spindle, and the workpiece to be processed is kept concentric with the lathe spindle through the top of the positioning mandrel 1, and the position of the workpiece to be processed is ensured by the positioning cone surface, and the workpiece to be processed includes an impeller 11; the clamping nut 4 is connected to the upper side of the fixture connection plate 5 by threads, and the impeller 11 of the workpiece to be processed is pressed by the end face and the contoured part of the clamping nut 4. Improve the processing accuracy and quality assurance of the stamping impeller 11 of the engine cooling water pump.

[0016] A method for machining a conical surface of an engine cooling water pump impeller, comprising the steps of:

[0017] S1. Connect the aforementioned engine cooling water pump impeller conical surface processing device to the lathe spindle through the fixture connecting plate, and calibrate the concentricity at the same time;

[0018] S2, the workpiece to be processed is determined to have a unique position and posture by the positioning mandrel and the positioning cone sleeve;

[0019] S3, using a compression nut to fit the workpiece through the profiling part, and the workpiece is compressed through threaded connection;

[0020] S4. The lathe spindle is rotated to lock the workpiece with the clamping nut and the cutting process begins.

[0021] The clamp connecting plate 5 needs to ensure the concentricity and verticality of the positioning core shaft 1, the positioning cone sleeve 2 and the lathe spindle, and the processing accuracy and assembly accuracy are high; by using concentric positioning, the workpiece to be processed is concentric with the pneumatic lathe spindle, and the lower conical surface of the workpiece to be processed fits with the conical surface of the positioning cone sleeve 2 to ensure the processing position and verticality; the contoured notch of the clamping nut 4 fits tightly with the outer contour of the workpiece to be processed, so that the workpiece to be processed is evenly stressed during processing. The clamping nut 4 is connected to the clamp connecting plate 5 through a reverse thread, so that when the clamp rotates with the lathe, the clamping nut 4 increases with the speed and the clamping force increases, ensuring that the workpiece does not loosen.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. An engine cooling water pump impeller conical surface processing device, characterized in that: The clamp includes a positioning mandrel, a positioning cone sleeve, a spherical bearing, a clamp nut and a fixture connection plate; the middle part of the fixture connection plate is provided with a first through groove, a second through groove, a third through groove, a fourth through groove and a fifth through groove in sequence from top to bottom, and the first through groove, the second through groove, the third through groove, the fourth through groove and the fifth through groove are cylindrical through grooves with different diameters; the bottom of the positioning mandrel is assembled in the fourth through groove on the fixture connection plate by interference fit, and is limited by the annular boss on the side of the positioning mandrel in the third through groove; the positioning cone sleeve is assembled by interference fit It is equipped on the spherical bearing, and the positioning core shaft passes through the middle part of the positioning cone sleeve; the spherical bearing is assembled in the second through groove on the fixture connecting plate by interference fit, and the coaxiality of the positioning core shaft and the positioning cone sleeve is ensured by the fixture connecting plate; the fifth through groove at the bottom of the fixture connecting plate is used to be concentrically connected with the lathe spindle, and the impeller is kept concentric with the lathe spindle through the top of the positioning core shaft, and the clamping nut is threadedly connected to the upper side of the fixture connecting plate, and the impeller is clamped by the end face and the contoured part of the clamping nut.

2. A method for machining the conical surface of an engine cooling water pump impeller, characterized in that: The use of the engine cooling water pump impeller conical surface processing device according to claim 1 comprises the following steps: Connecting the processing device described in claim 1 to the lathe spindle through the fixture connecting plate, and calibrating the concentricity at the same time; The impeller is positioned by the positioning mandrel and the positioning cone sleeve to determine the impeller position and posture to be unique; Use the compression nut to fit the impeller through the contoured part, and compress the impeller through threaded connection; The impeller is locked by the clamping nut through the rotation of the lathe spindle, and the cutting process begins.

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