CN203843328U - Linear cutting machining device for straight toothed spur gears - Google Patents

Abstract

The utility model provides a linear cutting machining device for straight toothed spur gears. The linear cutting machining device comprises a machine tool working table, an indexing mechanism, a linear electrode, a guide pulley and supporting frame assembly, a wire conveying mechanism and a cross-shaped working table. The machine tool working table is fixed to the horizontal ground. The indexing mechanism is mounted on the machine tool working table. The linear electrode is mounted on the cross-shaped working table through the guide pulley and supporting frame assembly. The guide pulley and supporting frame assembly and the wire conveying mechanism are assembled together in a matched mode. The linear cutting machining device is characterized in that the machine tool working table is matched with large gear workpieces; the outer side of the machine tool working table is provided with a cross-shaped working table longitudinal position adjusting mechanism and a cross-shaped working table longitudinal position adjustment driving mechanism. The linear cutting machining device reduces production cost of the gear workpieces, ensures the product quality, and is quite applicable to linear cutting machining of the small-batch large nonstandard straight toothed spur gears.

Description

A spur gear wire cutting device

technical field

The utility model relates to a gear wire cutting processing device, in particular to a wire cutting processing device suitable for small batches and large non-standard spur gears.

Background technique

Gear transmission is one of the most basic transmission methods in mechanical transmission. It is widely used in construction machinery, mining machinery, metallurgy, etc. due to its advantages of constant transmission ratio, good stability, large transmission power and speed range, compact structure and long service life. In the power transmission mechanism of machinery and various machine tools, the processing technology of gear parts is highly valued in the field of machining.

Traditional gear processing methods include generation method and profiling method. Since they are all methods of forming gear parts by removing materials using machine tool equipment, gear workpieces with different structural parameters need to be equipped with different tools, especially for Some gear parts on imported construction machinery, because they do not conform to the gear series grouping regulations in the national mechanical design standards, it is difficult to choose matching tools when processing gear parts in China. If the development of the cutting tool is carried out again, the processing cost of the gear fitting will undoubtedly be greatly increased.

In order to solve the above problems, people regard the wire cutting gear processing device as an option, as shown in Figure 1, its working principle is: use the high temperature melting generated by the wire electrode 3 (molybdenum wire or copper wire) at the moment of spark discharge Metal blanks form cutting gaps to achieve the purpose of cutting and forming gear teeth. During the wire cutting process, on the one hand, the wire electrode 3 is constantly moving up (down) relative to the gear workpiece 9; Driven by the stepping motor 8, the cutting feed is realized in the directions of the X-axis and the Y-axis, so that the linear electrode 3 moves along the tooth profile track, and the gear workpiece 9 is cut. However, the longitudinal distance between the cross workbench 6 and the machine tool workbench 1 (i.e. the distance in the X-axis direction) of the existing wire-cutting gear processing device is small, and generally only suitable for the processing of small gear workpieces 9, as shown in Figure 2 The machining of large non-standard spur gears 10 is powerless.

Utility model content

The purpose of the utility model is to provide a wire cutting processing device which can reduce the production cost and ensure the product quality and is suitable for small batches and large non-standard spur gears against the drawbacks of the prior art.

Problem described in the utility model is realized with following technical scheme:

A wire cutting processing device for spur gears, which includes a machine tool table, an indexing mechanism, a wire electrode, a guide wheel and a support frame assembly, a wire feeding mechanism, and a cross workbench, and the machine tool table is fixed on a horizontal ground , the indexing mechanism is installed on the machine tool table, the linear electrode is installed on the cross table through the guide wheel and the support frame assembly, the guide wheel and the support frame assembly are equipped with the wire feeding mechanism, and its special The advantage is that the machine tool workbench is matched with the large gear workpiece, and the longitudinal position adjustment mechanism and the longitudinal position adjustment drive mechanism of the cross workbench are arranged outside the machine tool workbench.

In the above spur gear wire cutting processing device, the longitudinal position adjustment mechanism of the cross table includes a support table, a longitudinal translation slide seat and a guide rail, and the longitudinal translation slide seat and the guide rail are composed of two symmetrically arranged parts. The middle translation sliding seat is assembled with the guide rail, and the translation sliding seat is fixed on the bottom surface of the support table, which is used to support the cross table, and the bottom surface is provided with a push plate assembled with the longitudinal position adjustment drive mechanism.

In the above spur gear wire cutting processing device, the longitudinal position adjustment drive mechanism includes a stepping motor and a transmission unit, one end of the transmission unit is connected to the stepping motor, and the other end is connected to the push plate provided on the bottom surface of the support table. Convert the stepper motor rotation action to the horizontal movement of the supporting table.

In the above-mentioned wire cutting processing device for spur gears, the cross table is driven by a longitudinal stepping motor to realize feeding in the X-axis direction, and driven by a horizontal stepping motor to realize feeding in the Y-axis direction, and the longitudinal stepping motor is installed On the side of the cross table, the horizontal stepper motor is installed in front of the cross table.

In the above spur gear wire cutting device, the wire electrode circulates around the guide wheel under the drive of the wire feeding mechanism, and the wire feeding mechanism is installed on the cross table.

The utility model designs the workbench of the machine tool as a large workbench matching the large gear workpiece, and sets a cross workbench longitudinal position adjustment mechanism and a longitudinal position adjustment drive mechanism on the outside of the machine tool workbench, thus solving the problem of large non-standard The problem of wire cutting processing of spur gears, it adjusts the relative position of the linear electrode and the gear blank through the longitudinal position adjustment mechanism of the cross table, so that the cutting process of gears with different structural parameters can be realized, and the wire cutting of spur gears is improved. The general performance of the processing device; the vertical stepping motor and the horizontal stepping motor of the utility model drive the cross worktable to move in the direction of X axis and Y axis, thereby driving the guide wheel and the support frame assembly fixed on the cross workbench and winding The linear electrode on the guide wheel realizes the cutting feed, makes the linear electrode move along the tooth profile track, and completes the cutting process of the large non-standard straight cylindrical internal tooth gear. In a word, the utility model reduces the production cost of the gear workpiece, ensures the product quality, and is very suitable for wire cutting processing of small batches and large non-standard spur gears.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 is the structural representation of existing wire cutting gear processing device;

Figure 2 is a schematic diagram of the structure of a large non-standard spur gear;

Fig. 3 is a structural representation of the utility model;

Fig. 4 is a structural enlarged view at I place among Fig. 3;

Fig. 5 is a schematic diagram of the cross-sectional structure of A-A in Fig. 3;

Fig. 6 is a schematic diagram of the utility model for processing large spur gears.

The list of labels in the figure is: 1. Machine tool table, 2. Indexing mechanism, 3. Linear electrode, 4. Guide wheel and support frame assembly, 5. Wire feeding mechanism, 6. Cross table, 7. Longitudinal step Incoming motor, 8, horizontal stepping motor, 9, gear workpiece, 10, large spur gear, 11, cross table longitudinal position adjustment mechanism, 11-1, support table, 11-2, longitudinal translation slide seat, 11 -3, guide rail, 11-4, push plate, 12, longitudinal position adjustment drive mechanism, 12-1, stepping motor, 12-2, transmission unit.

Detailed ways

Referring to Fig. 3, the utility model comprises a machine tool workbench 1, an indexing mechanism 2, a linear electrode 3, a guide wheel and a support frame assembly 4, a wire transport mechanism 5 and a cross workbench 6, and the machine tool workbench 1 is fixed on a horizontal On the ground, the indexing mechanism 2 is installed on the machine tool table 1, and the linear electrode 3 is installed on the cross table 6 through the guide wheel and the support frame assembly 4. The wire mechanism 5 is assembled, and its special feature is that: the machine tool table 1 matches the large gear workpiece, and a cross table longitudinal position adjustment mechanism 11 and a longitudinal position adjustment drive mechanism 12 are set outside the machine tool table 1.

Referring to Fig. 3, the cross table 6 of the present utility model realizes the feed in the X-axis direction under the drive of the longitudinal stepping motor 7, and the longitudinal stepping motor 7 is installed on the side of the cross table 6; the cross table of the present invention 6. Feed in the Y-axis direction is realized under the drive of the horizontal stepping motor 8, and the horizontal stepping motor 8 is installed in front of the cross table 6; the linear electrode 3 of the utility model is driven around the guide wheel by the wire transport mechanism 5 Circular operation, the wire feeding mechanism 5 is installed on the cross table 6 .

Referring to Fig. 3 and Fig. 5, the longitudinal position adjustment mechanism 11 of the cross table of the present invention includes a support table 11-1, a longitudinal translation slide seat 11-2 and a guide rail 11-3, and the longitudinal translation slide seat 11-2 and the guide rail 11-3 is composed of two parts symmetrically arranged, and in each part, the translation sliding seat 11-2 and the guide rail 11-3 are assembled, and the translation sliding seat 11-2 is fixed on the bottom surface of the support table 11-1, and the support The table top 11-1 is used to support the cross table 6, and a push plate 11-4 assembled with the longitudinal position adjustment drive mechanism 12 is arranged on its bottom surface.

Referring to Fig. 3 and Fig. 4, the longitudinal position adjustment driving mechanism 12 of the present utility model includes a stepper motor 12-1 and a transmission unit 12-2, one end of the transmission unit 12-2 is connected with the stepper motor 12-1, and the other end It is connected with the push plate 11-4 provided on the bottom surface of the support table, which converts the rotation of the stepper motor 12-1 into the horizontal movement of the support table 11-1.

Referring to Figures 3 to 6, the utility model designs the machine tool workbench 1 as a large workbench matching the large gear workpiece, and sets a cross workbench longitudinal position adjustment mechanism 11 and a longitudinal position adjustment drive mechanism on the outside of the machine tool workbench 1 12. This solves the problem of wire cutting processing for large non-standard spur gears 10. It adjusts the relative position of the wire electrode 3 and the gear blank through the longitudinal position adjustment mechanism 11 of the cross table, so that different structures can be realized. The cutting process of the parametric gear improves the general performance of the spur gear wire cutting processing device. When the utility model cuts and processes the large spur gear 10, the workpiece is clamped on the indexing mechanism 2, and the linear electrode 3 is driven by the wire transport mechanism 5 to continuously move downward relative to the workpiece, so that the linear electrode 3 The spark discharge position of the electrode is constantly changing, taking away the excess heat generated; on the other hand, the linear electrode 3 is driven by the vertical stepping motor 7 and the horizontal stepping motor 8, and is realized on the X-axis and Y-axis direction on the cross table 6. Cutting feed makes it move along the tooth profile track to cut the workpiece. After one gear tooth of the workpiece is cut, the indexing mechanism 2 drives the workpiece to rotate a tooth pitch, and then the linear electrode 3 cuts the next gear tooth.

Claims (5)

1. A spur gear wire cutting device, which includes a machine tool table (1), an indexing mechanism (2), a wire electrode (3), a guide wheel and a support frame assembly (4), and a wire transport mechanism ( 5) and a cross workbench (6), the machine tool workbench (1) is fixed on the horizontal ground, the indexing mechanism (2) is installed on the machine tool workbench (1), and the linear electrode (3) Installed on the cross table (6) through the guide wheel and support frame assembly (4), the guide wheel and support frame assembly (4) is assembled with the wire feeding mechanism (5), and the feature is that the machine tool table (1) To match the large gear workpiece, a cross table longitudinal position adjustment mechanism (11) and a longitudinal position adjustment drive mechanism (12) are arranged outside the machine tool table (1). 2. A spur gear wire-cutting processing device according to claim 1, characterized in that the longitudinal position adjustment mechanism (11) of the cross table includes a support table (11-1), a longitudinal translation slide ( 11-2) and guide rail (11-3), the longitudinal translation slide seat (11-2) and guide rail (11-3) are composed of two symmetrically arranged parts, in each part the translation slide seat (11-2 ) and the guide rail (11-3), the translation slide (11-2) is fixed on the bottom surface of the support table (11-1), and the support table (11-1) is used to support the cross table (6) , a push plate (11-4) assembled with the longitudinal position adjustment drive mechanism (12) is provided on its bottom surface. 3. A spur gear wire-cutting processing device according to claim 2, characterized in that the longitudinal position adjustment drive mechanism (12) includes a stepping motor (12-1) and a transmission unit (12-2 ), one end of the transmission unit (12-2) is connected to the stepper motor (12-1), and the other end is connected to the push plate (11-4) set on the bottom surface of the support table, which will connect the stepper motor (12-1 ) is converted into the horizontal movement of the support table (11-1). 4. A spur gear wire cutting device according to claim 3, characterized in that the cross table (6) is driven by the longitudinal stepping motor (7) to realize the feed in the X-axis direction, and the Driven by the horizontal stepping motor (8) to realize feed in the direction of the Y axis, the longitudinal stepping motor (7) is installed on the side of the cross table (6), and the horizontal stepping motor (8) is installed on the cross table (6) front. 5. The wire-cutting processing device for spur gears according to claim 4, characterized in that, the wire electrode (3) circulates around the guide wheel under the drive of the wire feeding mechanism (5), and the running Wire mechanism (5) is installed on the cross table (6).