CN118635541A - Double-head CNC machine tool and processing method for automobile drive shaft - Google Patents

Abstract

The patent of the present invention relates to the field of shaft equipment processing, and in particular to a double-head CNC machine tool and processing method for automobile drive shaft parts, including a lathe base, a double-head lathe bed and a panel bracket, the double-head lathe bed and the panel bracket are fixed on the lathe base; the double-head lathe bed is provided with a pneumatic chuck, a tool holder mechanism, and an electric spindle mechanism, the tool holder mechanism is installed on one side of the pneumatic chuck, the pneumatic chuck is fixed at the front end of the double-head lathe bed, the electric spindle mechanism is installed at the rear end of the double-head lathe bed, the electric spindle mechanism moves on the double-head lathe bed, the fixed pneumatic chuck and the electric spindle mechanism clamp the workpiece, the pneumatic chuck and the electric spindle mechanism rotate at the same time, the tool holder mechanism and the tool holder are processed, and the processing steps are reduced when the workpiece does not need to be re-clamped, thereby effectively improving the processing efficiency.

Description

Double-head CNC machine tool and processing method for automobile drive shaft

Technical Field

The invention patent relates to the field of shaft equipment processing, and in particular to a double-head CNC machine tool and processing method for automobile drive shaft parts.

Background Art

In the machinery manufacturing industry, cutting of shaft end faces is a common process. In the prior art, ordinary lathes are often used to perform end face cutting on workpieces. For automobile drive shafts with large production batches, their function is to transmit the torque differential half-shaft gear to the drive wheels. Since the drive shaft relies on splines and tapered shafts to cooperate with the planetary carrier to transmit torque, the tapered part of the drive shaft is removed, and the drive adapter and the spline shaft are designed as two independent parts. The adapter is designed as an inner spline groove that cooperates with the drive shaft spline, and the drive shaft spline is designed as a full-body spline to transmit torque. In this way, the torque is completely transmitted by the spline shaft and the planetary carrier, and the spline shaft will no longer produce stress concentration due to the variable cross-section and uneven strength caused by the tapered shaft, thereby improving the strength of the drivable shaft.

During the processing of the traditional CNC lathe, the production process starts from one end of the shaft. In order to reduce the processing time and improve production efficiency, the double-head CNC machine tool can save time for the processing of automobile drive shafts.

Invention patent content

The technical problem to be solved by the patent of this invention is how to improve the processing efficiency of existing CNC lathes for shaft parts. The double-head CNC machine tool and processing method of automobile drive shaft parts include a lathe base, a double-head lathe bed and a panel bracket. The double-head lathe bed and the panel bracket are fixed on the lathe base; a pneumatic chuck, a tool holder mechanism, and an electric spindle mechanism are provided on the double-head lathe bed. The tool holder mechanism is installed on one side of the pneumatic chuck, the pneumatic chuck is fixed at the front end of the double-head lathe bed, the electric spindle mechanism is installed at the rear end of the double-head lathe bed, and the electric spindle mechanism moves on the double-head lathe bed.

Furthermore, the tool holder mechanism includes a tool holder drive motor, a motor seat, a linear rail shim slide plate and a four-axis power head. The tool holder drive motor is vertically installed on the motor seat, the linear rail shims are installed in sequence on the lower end of the motor seat, the slide plate is installed on the linear rail shims, the power heads are fixed on the slide plate all around, and the tool holder mechanism is installed on one side of the pneumatic chuck to process the workpiece during the rotation of the pneumatic chuck. At the same time, the four-axis power head on the tool holder mechanism can realize the retrieval of different tools by moving several tools up and down corresponding to the radial direction of the pneumatic chuck, such as a cutting tool and a cutting tool or a threading tool.

Furthermore, the electric spindle mechanism includes a collet body, an end cover, a front end cover, an electric spindle headstock, a locking nut, a spindle stator, a rotor bushing; an angular contact bearing, a radial locking nut, a cylinder core, a magnetic ring, an expansion tube, and an electric spindle base plate. The cylinder core is a hollow shaft. One end of the cylinder core is provided with a flange. The collet body is installed from the flange end of the cylinder core, and the end cover is installed on the other side of the flange end of the cylinder core. The front end cover is installed on the rear side of the end cover. The front end cover is connected to the electric spindle headstock, and the spindle is installed inside the electric spindle headstock. Stator, an angular contact bearing is installed between the front end cover and the cylinder core, a locking nut is installed on one side of the angular contact bearing, the locking nut is threadedly connected to the cylinder core, a rotor bushing and an expansion tube are installed between the spindle stator and the cylinder core, a magnetic ring is installed at one end of the cylinder core, and an electric spindle base plate is provided at the bottom of the electric spindle mechanism. The design principle, the improved method of the present invention is through a mechanical machine, the electric spindle mechanism, is the core of double-head CNC machine tool workpiece processing, and its clamping is through a collet body, and interference fit is achieved on the cylinder core to achieve tightening.

Furthermore, the double-head lathe bed includes an upper support plate assembly, on which an upper support plate slider and a tool holder are provided. One end of the upper support plate slider is fixed with the electric spindle mechanism, and the other end is installed with the tool holder. The upper support plate assembly enables the electric spindle mechanism to move left and right in the radial direction of the cylinder chuck axis.

Furthermore, the tailstock screw assembly is provided with an upper pallet servo motor, an upper pallet slide rail and an upper pallet screw mechanism. The upper pallet servo motor and the upper pallet screw mechanism, the upper end of the upper pallet screw mechanism is fixed with the upper pallet slide rail, and the tailstock screw assembly is used to cope with the forward and backward movement of the electric spindle mechanism to cope with different shaft lengths.

Furthermore, the method comprises the following steps:

Step 1: Use the pneumatic chuck to tighten the workpiece;

Step 2: The pneumatic chuck rotates the tool on the tool holder to process the workpiece;

Step 3: The electric spindle mechanism clamps the workpiece through the collet body, and the pneumatic chuck releases the workpiece;

Step 4: The electric spindle mechanism rotates the tool holder mechanism to cut the workpiece.

Furthermore, the processing sequence of step one and step two can be interchanged, and in step one, the pneumatic chuck and the electric spindle mechanism can be set to clamp the workpiece simultaneously, and the tool holder mechanism and the tool holder can be processed simultaneously while the pneumatic chuck and the electric spindle mechanism rotate simultaneously.

The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation on the present invention. In the accompanying drawings:

FIG1 is a schematic top view of the patent structure of the present invention;

FIG2 is a schematic diagram of the structure of the double-head lathe bed of the present invention;

FIG3 is a schematic diagram of the structure of the tool holder mechanism of the present invention;

FIG4 is a schematic diagram of the electric spindle mechanism of the present invention;

FIG5 is a schematic cross-sectional view of the electric spindle mechanism of the present invention;

FIG6 is a schematic diagram of the structure of the upper support plate assembly of the present invention;

FIG7 is a schematic diagram of the structure of the tailstock screw rod assembly of the present invention;

In the figure: 100, lathe base; 200; double-head lathe bed; 300; panel bracket; 201, pneumatic chuck; 210, tool holder mechanism; 211, tool holder drive motor; 212, motor seat; 213, linear rail pad; 214, slide plate; 215, four-axis power head; 220; electric spindle mechanism; 221, collet body; 222, end cover; 223, front end cover; 224, electric spindle headstock; 225, locking nut; 226, spindle stator; 227, rotor bushing; 228, angular contact bearing; 229, radial locking nut; 2210, cylinder core; 2211, magnetic ring; 2212, expansion tube; 2213, electric spindle base plate; 230, upper support plate assembly; 231, upper support plate slider; 232, tool holder; 240; tailstock screw assembly; 241, upper support plate servo motor; 242, upper support plate slide rail; 243, upper support plate screw mechanism.

DETAILED DESCRIPTION

The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. The same reference numerals in the accompanying drawings all refer to the same components.

Referring to Figures 1 to 7; a double-head CNC machine tool and a processing method for automobile drive shaft parts include a lathe base 100, a double-head lathe bed 200 and a panel bracket 300, the double-head lathe bed 200 and the panel bracket 300 are fixed on the lathe base 100; the double-head lathe bed 200 is provided with a pneumatic chuck 201, a tool holder mechanism 210, and an electric spindle mechanism 220, the tool holder mechanism 210 is installed on one side of the pneumatic chuck 201, the pneumatic chuck 210 is fixed to the front end of the double-head lathe bed 200, the electric spindle mechanism 220 is installed at the rear end of the double-head lathe bed 200, and the electric spindle mechanism 220 moves on the double-head lathe bed 200.

The tool holder mechanism 210 includes a tool holder drive motor 211, a motor seat 212, a linear rail shim 213, a slide plate 214 and surrounding power heads 215. The tool holder drive motor 211 is vertically mounted on the motor seat 212, the linear rail shim 213 is sequentially mounted on the lower end of the motor seat 212, the slide plate 214 is mounted on the linear rail shim 213, and the surrounding power heads 215 are fixed on the slide plate 214.

As shown in Figures 4 and 5, the electric spindle mechanism 220 includes a collet body 221, an end cover 222, a front end cover 223, an electric spindle headstock 224, a locking nut 225, a spindle stator 226, a rotor bushing 227, an angular contact shaft 228, a radial locking nut 229, a cylinder core 2210, a magnetic ring 2211, an expansion tube 2212, and an electric spindle base plate 2213. The cylinder core 2210 is in the shape of a hollow shaft. One end of the cylinder core 2210 is in the shape of a flange. The collet body 211 is installed from the flange end of the cylinder core 2210, and the end cover 222 is installed on the other side of the flange end of the cylinder core 2210. The front end cover 223 is installed on the rear side of the end cover. The front end cover 223 is connected to the electric spindle headstock. The electric spindle head box 224 is connected, a spindle stator 226 is installed inside the electric spindle head box 224, an angular contact bearing 228 is installed between the front end cover 223 and the cylinder core 2210, a locking nut 225 is installed on one side of the angular contact bearing 228, and the locking nut 225 is threadedly connected to the cylinder core 2210, a rotor bushing 227 and an expansion tube 2212 are installed between the spindle stator 226 and the cylinder core 2210, a magnetic ring 2211 is installed at one end of the cylinder core 2210, an electric spindle bottom plate 2213 is provided at the bottom of the electric spindle mechanism 220, the electric spindle mechanism 220, wherein the cylinder core 2210 is hollow, and the collet body 221 at one end clamps the workpiece,

As shown in FIG. 2 and FIG. 6 , the double-head lathe bed 200 includes an upper support plate assembly 230 , on which an upper support plate slider 231 and a tool holder 232 are provided. The upper support plate slider 231 has one end for fixing the electric spindle mechanism 220 and the other end for installing the tool holder 232 .

As shown in FIG. 7 , the tailstock screw assembly 240 is provided with an upper pallet servo motor 241 , an upper pallet slide rail 242 and an upper pallet screw mechanism 243 . The upper pallet servo motor 241 and the upper pallet screw mechanism 243 are fixed to the upper end of the upper pallet slide rail 242 .

The method comprises the following steps:

Step 1: The pneumatic chuck 201 tightens the workpiece;

Step 2: The pneumatic chuck 201 rotates the tool on the tool holder 232 to process the workpiece;

Step 3: The electric spindle mechanism 220 clamps the workpiece through the collet body 221, and the pneumatic chuck 201 releases the workpiece;

Step 4: The electric spindle mechanism 220 rotates the tool holder mechanism 210 to perform cutting processing on the workpiece.

Furthermore, the processing order of step one and step two can be interchanged, and in step one, the pneumatic chuck 201 and the electric spindle mechanism 220 can be set to clamp the workpiece simultaneously, and the pneumatic chuck 201 and the electric spindle mechanism 220 rotate simultaneously, and the tools on the tool holder mechanism 210 and the tool holder 232 are processed simultaneously.

Design principle: The improvement method of the present invention is to clamp the two ends of the workpiece by adding an electric spindle mechanism 220, fix the pneumatic chuck and the electric spindle mechanism to clamp the workpiece, and the pneumatic chuck and the electric spindle mechanism rotate at the same time, and the tool holder mechanism and the tool holder are processed. When the workpiece does not need to be re-clamped, the processing steps are reduced, and the processing efficiency is effectively improved.

Finally, it should be noted that the above is only a preferred embodiment of the invention patent and is not intended to limit the invention patent. Although the invention patent is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the invention patent shall be included in the protection scope of the invention patent.

Claims (7)

1. A double-head CNC machine tool and a processing method for automobile drive shaft parts, comprising a lathe base (100), a double-head lathe bed (200) and a panel bracket (300), wherein the double-head lathe bed (200) and the panel bracket (300) are fixed on the lathe base (100); The invention is characterized in that a pneumatic chuck (201), a tool holder mechanism (210) and an electric spindle mechanism (220) are provided on a double-head lathe bed (200); the tool holder mechanism (210) is installed on one side of the pneumatic chuck (201); the pneumatic chuck (201) is fixed to the front end of the double-head lathe bed (200); the electric spindle mechanism (220) is installed at the rear end of the double-head lathe bed (200); and the electric spindle mechanism (220) moves on the double-head lathe bed (200). 2. The double-head CNC machine tool and processing method of the automobile drive shaft according to claim 1 is characterized in that the tool holder mechanism (210) includes a tool holder drive motor (211), a motor seat (212), a linear rail shim (213), a slide plate (214) and a surrounding power head (215), the tool holder drive motor (211) is vertically installed on the motor seat (212), the linear rail shim (213) is installed at the lower end of the motor seat (212) in sequence, the slide plate (214) is installed on the linear rail shim (213), and the surrounding power head (215) is fixed on the slide plate (214). 3. The double-head CNC machine tool and processing method for automobile drive shaft according to claim 1 is characterized in that the electric spindle mechanism (220) includes a collet body (221), an end cover (222), a front end cover (223), an electric spindle headstock (224), a locking nut (225), a spindle stator (226), a rotor bushing (227); an angular contact bearing (228), a radial locking nut (229), a cylinder core (2210) magnetic ring (2211), an expansion tube (2212), and an electric spindle bottom plate (2213); the cylinder core (2210) is a hollow shaft, one end of the cylinder core (2210) is provided with a flange, the collet body (221) is installed from the flange end of the cylinder core (2210), and the end is installed on the other side of the flange end of the cylinder core (2210). A cover (222) is provided, a front end cover (223) is installed at the rear side of the end cover (222), the front end cover (223) is connected to the electric spindle headstock (224), a spindle stator (226) is installed inside the electric spindle headstock (224), an angular contact bearing (228) is installed between the front end cover (223) and the oil cylinder core (2210), a locking nut (225) is installed on one side of the angular contact bearing (228), the locking nut (225) is threadedly connected to the oil cylinder core (2210), a rotor bushing (227) and an expansion tube (2212) are installed between the spindle stator (226) and the oil cylinder core (2210), a magnetic ring (2211) is installed at one end of the oil cylinder core (2210), and an electric spindle base plate (2213) is provided at the bottom of the electric spindle mechanism (220). 4. The double-head CNC machine tool and processing method for automobile drive shaft parts according to claim 1 is characterized in that the double-head lathe bed (200) includes an upper support plate assembly (230), and the upper support plate assembly (230) is provided with an upper support plate slider (231) and a tool holder (232), and the upper support plate slider (231) has one end to fix the electric spindle mechanism (220) and the other end to install the tool holder (232). 5. The double-head CNC machine tool and processing method of the automobile drive shaft according to claim 1 is characterized in that the tailstock screw assembly (240) is provided with an upper pallet servo motor (241), an upper pallet slide rail (242) and an upper pallet screw mechanism (243), and the upper pallet servo motor (241) and the upper pallet screw mechanism (243), and the upper end of the upper pallet screw mechanism (243) is fixed with the upper pallet slide rail (242). 6. The double-head CNC machine tool processing method for automobile drive shaft parts according to claim 1 is characterized in that the method is applied to an energy storage system based on controlled switching of online hot backup batteries according to any one of claims 1 to 5, and the method comprises the following steps: Step 1: The pneumatic chuck (201) clamps the workpiece; Step 2: The pneumatic chuck (201) rotates the tool on the tool holder (232) to process the workpiece; Step 3: The electric spindle mechanism (220) clamps the workpiece through the collet body (221), and the pneumatic chuck (201) releases the workpiece; Step 4: The electric spindle mechanism (220) rotates the tool holder mechanism (210) to perform cutting processing on the workpiece. 7. The double-head CNC machine tool processing method for automobile drive shaft parts according to claim 6 is characterized in that the processing order of step one and step two can be interchanged, and in step one, the pneumatic chuck (201) and the electric spindle mechanism (220) can be set to clamp the workpiece at the same time, and the pneumatic chuck (201) and the electric spindle mechanism (220) rotate at the same time, and the tools on the tool holder mechanism (210) and the tool seat (232) are processed at the same time.