CN201098764Y - A spiral bevel gear forming and milling machine tool - Google Patents

Abstract

A gear milling machine tool for shaping spiral bevel gear comprises a transverse sliding platform (4) and a longitudinal sliding platform (8) respectively arranged on a pedestal (5) of the machine tool. The gear milling machine tool is characterized in that a cutter disc support box (3) is arranged on the transverse sliding platform (4), a cutter disc drive roller (2) is arranged in the hole of the cutter disc support box (3), a facer (1) is eccentrically arranged in the cutter disc drive roller (2), and a workpiece box (7) with rotatable pedestal is arranged on the longitudinal sliding platform (8). The gear milling machine tool can improve the processing efficiency of spiral bevel gear and hypoid gear and lower the manufacture cost.

Description

A spiral bevel gear forming and milling machine tool

Technical field:

The utility model relates to the technical field of machine tool equipment, in particular to a spiral bevel gear forming milling machine tool.

Background technique:

When the pitch angle of spiral bevel gear and hypoid gear is greater than 70°, it can be processed by forming method. Compared with the hobbing method, the advantages of forming gear milling are high processing efficiency and simplified machine tool structure. For this reason, during the 1970s and 1980s, many manufacturers in our country spent huge sums of money to import them from the American Gleason Company. A large number of spiral bevel gear milling machines, the machine tool models processed by the big wheel forming method are mainly 606#, 607#, 608# and 609#. Among them, 606# and 608# are mainly used for rough milling teeth, and 607# and 609# are mainly used for fine drawing teeth. At present, this type of machine tool has reached the replacement period, and the United States no longer produces this type of machine tool. At present, the machine tools for rough milling of spiral bevel gear wheels in my country are mainly Y2250 and Y2280 gear milling machines produced by Tianjin No. 1 Machine Tool General Factory. This type of machine tool is a universal processing machine tool for spiral bevel gears. The price is high and the gear cutting efficiency is low. The market is in urgent need. A rough milling machine that can replace the 606# and 608# rough milling machines produced by American Gleason Company, and is used for rough milling of spiral bevel gears and hypoid gear wheels.

Utility model content:

In order to solve the above existing problems, the purpose of this utility model is to provide a spiral bevel gear forming and milling machine tool, which can improve the processing efficiency of spiral bevel gears and hypoid gears, and reduce manufacturing costs.

The utility model is realized by adopting the following technical solutions:

A spiral bevel gear forming and milling machine tool, the horizontal sliding table and the vertical sliding table are respectively installed on the base of the machine tool, a cutter support box is installed on the horizontal slide table, and a cutter head support box is installed in the hole of the cutter support box. The cutter head drives the drum, and the milling cutter head is mounted eccentrically in the cutter head drive drum.

A workpiece box whose base is rotatable is installed on the described longitudinal slide table.

The horizontal sliding table adopts one of numerical control sliding table, mechanical sliding table or manual adjustment sliding table.

The longitudinal sliding table adopts one of numerical control sliding table, hydraulic sliding table or mechanical sliding table.

The main shaft indexing method of the workpiece box is as follows: the numerical control system of the machine tool controls the rotation of the motor, and the motor forms a transmission chain with the main shaft through gear transmission.

Another indexing method of the main shaft of the workpiece box is as follows: an indexing plate with the same number of teeth as the gear to be processed is installed on the main shaft, and the indexing plate is connected with the hydraulic oil cylinder.

Owing to adopting above-mentioned technical scheme, the utility model obtains following effect:

The utility model simplifies the structure of the machine tool, has good rigidity and high processing efficiency, greatly reduces the sales price of the machine tool and the manufacturing cost of the gear, and can be widely used in the gear processing industry, especially in the processing of the active and passive bevel gears of the automobile rear axle.

The milling cutter head of the utility model is installed eccentrically in the cutter head drive roller, and the cutter head drive roller is installed in the cutter head support box. After the connecting bolts are loosened, the cutter head drive roller can rotate in the hole of the cutter head support box. The milling cutter head is driven to rotate through gear deceleration; the workpiece is installed on the main shaft of the workpiece box, and the workpiece box is installed on the longitudinal slide table. After loosening the connecting bolts, the workpiece box can rotate at a certain angle on the longitudinal slide table, so that the processed gear The dedendum generatrix of is located in the plane where the top of the milling cutter head is located. The utility model can form and mill the spiral bevel gear and the hypoid gear whose pitch angle is greater than 70°, and has the characteristics of high-efficiency processing.

Description of drawings:

Fig. 1 is a structural representation of the utility model.

Detailed ways:

As shown in Fig. 1, the utility model mainly comprises cutter head drive cylinder, cutter head supporting box, workpiece case and two slide tables. The milling cutter disc 1 is installed eccentrically on the cutter disc drive drum 2, powered by the motor and driven to rotate through the gear deceleration; the cutter disc drive drum 2 is installed in the hole of the cutter disc support box 3 through the connecting bolts, and the connection is loosened The cutter head driving drum 2 can rotate in the hole of the cutter head support box 3 after the bolt, so as to adjust the vertical position of the milling cutter head center of rotation, that is, the vertical cutter position. The cutter head supporting box 3 is installed on the horizontal slide table 4, and the horizontal slide table 4 is installed on the machine tool base 5, and the horizontal position of the center of the milling cutter head can be adjusted by moving the horizontal slide table 4, that is, the horizontal knife position. The workpiece 6 is installed on the main shaft of the workpiece box 7, the base of the workpiece box 7 is rotatable, the workpiece box 7 is installed on the longitudinal sliding table 8 through the connecting bolts, after the connecting bolts are loosened, the workpiece box 7 can rotate on the longitudinal sliding table 8 A certain angle can adjust the angle between the axis of the milling cutter disc and the spindle on which the workpiece is installed, that is, the installation angle of the workpiece. The longitudinal sliding table 8 is installed on the machine tool base 5, drives the workpiece 6 to feed and cut the tooth groove evenly during the machining process, controls the extreme movement of the longitudinal sliding table 8, and can control the tooth depth of the processed gear. Horizontal slide table 4 can adopt one of numerical control slide table, mechanical slide table or manual adjustment slide table. Longitudinal slide table 8 can adopt one of numerically controlled slide table, hydraulic pressure slide table or mechanical slide table. The main shaft indexing mode of the workpiece box 7 is realized by two structural forms: ① the CNC system of the machine tool controls the rotation of the servo motor (or stepping motor), and the servo motor (or stepping motor) forms a transmission chain with the main shaft through gear transmission; ② An indexing plate with the same number of teeth as the gear to be processed is installed on the main shaft. The indexing plate is connected with the hydraulic cylinder. During the gear cutting process, the indexing plate is locked by the hydraulic oil cylinder. tooth.

When the large wheel is processed by the forming method, once the cutter head driving drum 2 and the cutter head support box 3 are adjusted, they will be fixed, and the cutter head will directly cut into the tooth blank through the movement of the longitudinal slide table 8, and the shape of the tooth surface and the cutter head cutting The surface shape is exactly the same, the calculation process of gear cutting and the structure of the machine tool are very simple, and it is widely used in the processing of spiral bevel gears and hypoid gears.

Hanging wheel is housed in the cutter head drive drum 2, and the cutting speed of its milling cutter head 1 can be realized by changing the hanger wheel in the cutter head drive drum 2, and 18 ", 12 ", 9 " and 6 " milling cutter heads can be used.

The relationship between the angle φ of the cutterhead drive drum 2 rotating in the hole of the cutterhead support box 3 and the vertical cutter position V is

φ＝arcsin[(V-B)/e] (1)

In the formula, e is the eccentricity of the cutter head rotation center in the cutter head driving drum 2, and B is the distance between the axis of the cutter head driving drum and the axis of the workpiece.

The relationship between the rotation angle δ of the workpiece box 7 on the longitudinal slide 8 and the root taper angle δ _f of the processed gear is as follows:

δ = δ _f -70° (2)

The calculation formula of the displacement X of the transverse sliding table 4 and the horizontal knife position H is

X＝He cos φ-Acosδ _f (3)

In the formula, A is the distance from the cone top of the processed gear to the axis of rotation of the workpiece box 7 on the longitudinal slide 8.

Claims (6)

1. A spiral bevel gear forming and milling machine tool, its transverse slide table (4) and longitudinal slide table (8) are installed on the machine tool base (5) respectively, it is characterized in that: in described transverse slide table (4) A cutterhead support box (3) is installed on the top, and a cutterhead drive cylinder (2) is installed in the hole of the cutterhead support box (3), and the milling cutterhead (1) is eccentrically installed in the cutterhead drive cylinder (2). 2. The spiral bevel gear forming and milling machine tool according to claim 1, characterized in that: a workpiece box (7) whose base is rotatable is installed on the described longitudinal slide table (8). 3. The spiral bevel gear forming and milling machine tool according to claim 1, characterized in that: the horizontal sliding table (4) adopts one of a numerically controlled sliding table, a mechanical sliding table or a manually adjusted sliding table. 4. The spiral bevel gear forming and milling machine tool according to claim 1, characterized in that: the longitudinal sliding table (8) adopts one of a numerical control sliding table, a hydraulic sliding table or a mechanical sliding table. 5. The spiral bevel gear forming and milling machine tool according to claim 2, characterized in that: the main shaft indexing mode of the workpiece box (7) is: the numerical control system of the machine tool controls the motor rotation, and the motor is connected to the main shaft through gear transmission Form a transmission chain. 6. The spiral bevel gear forming and milling machine tool according to claim 2, characterized in that: another indexing method of the main shaft of the workpiece box (7) is: the number of teeth on the main shaft is equal to the number of teeth of the gear to be processed The same indexing plate, the indexing plate is connected with the hydraulic cylinder.

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