CN212094379U - Hydraulic telescopic cutter - Google Patents

Abstract

The utility model relates to the technical field of machining, and discloses a hydraulic retractable cutter, comprising a turret, a differential case, a hinge shaft, a connecting rod, a cutter bar, a fixed sleeve, a working cavity, an end face automatic cutter, a cutter extension Control connecting rod, tool telescopic hydraulic cylinder, gasket and ball cage knife, the inner wall of the turret is connected with the outer wall of the working cavity, the outer wall of the fixed sleeve is connected with the outer wall of the working cavity, and the output end of the tool telescopic hydraulic cylinder is telescopic with the tool The right side of the control link is connected, the outer surface of the tool telescopic control link is connected with the inner wall of the gasket, the left side of the tool telescopic control link is connected with the right side of the tool bar, and the outer surface of the tool bar is connected with the fixed sleeve The inner wall of the cutter bar is connected with the outer surface of the hinge shaft. The utility model solves the problems that the processing of the inner spherical surface of the differential case is relatively difficult, the requirements are high, and the processing cost of the inner spherical surface of the differential case is relatively high.

Description

Hydraulic retractable tool

technical field

The utility model relates to the technical field of mechanical processing, and relates to a hydraulic retractable tool.

Background technique

The differential case is one of the key components in the automobile drive axle assembly, and its processing quality directly affects the meshing accuracy of the main reducer gear and the noise index of the drive axle assembly, especially the differential case, one of the main components. The processing of the inner spherical surface of the casing is difficult and requires high requirements. At present, there are mainly the following methods for processing the inner spherical surface of the differential casing; The machined hole is inserted into the tool shank from both sides to withstand the countersink, and the workpiece moves with the fixture, thereby processing the inner spherical surface. The main disadvantages of using the countersink are: the shape of the tool is complex, it needs to be specially ordered, the service life is low, and the price is high. . It is inconvenient for the tool to enter and exit the differential casing, and a special tool holding mechanism is required. The dimensional accuracy of the inner spherical surface depends on the accuracy of the tool. The processing equipment needs to use a special machine tool or an ordinary lathe to refit. 2. The multi-axis CNC lathe is used for processing. The tool holder of the multi-axis CNC machine tool can perform complex plane movements. Through the machined hole, the tool is extended into the differential casing to process the inner spherical surface. Multi-axis CNC lathe The main features of processing inner spherical surface: good processing quality and high efficiency, but it needs to buy imported machine tools, which is expensive. 3. The oscillating tool processing method is used, which requires a special machine tool. During processing, the workpiece moves and rotates. After the tool bar with the tool enters the differential housing through the machined hole, it passes through the connecting rod mechanism in the tool bar. , push the tool out of the tool shank, and make an arc movement around the center of the circle, so as to process the inner spherical surface, and use the swing tool method to process the inner surface. When the spherical surface, the center of the arc movement of the tool must coincide with the center of the SR51 sphere, and the dimensional accuracy depends on the tool The distance from the tip to the center of rotation of the tool cannot compensate for the wear of the tool tip.

Utility model content

The purpose of the utility model is to provide a hydraulic retractable tool, the machining accuracy can reach the processing level of the multi-axis CNC lathe, the cost is far lower than that of the multi-axis CNC lathe, and the cost is significantly reduced.

In order to achieve the above purpose, the utility model provides the following technical solutions: a hydraulic retractable cutter, including a turret, a differential case, a hinge shaft, a connecting rod, a cutter bar, a fixed sleeve, a working cavity, an end face automatic cutter, a cutter Telescopic control link, tool telescopic hydraulic cylinder, gasket and ball cage knife, the inner wall of the turret is connected with the outer wall of the working cavity, the outer wall of the fixed sleeve is connected with the outer wall of the working cavity, the output end of the tool telescopic hydraulic cylinder is connected with the cutter The right side of the telescopic control link is connected, the outer surface of the tool telescopic control link is connected with the inner wall of the gasket, the left side of the tool telescopic control link is connected with the right side of the tool bar, and the outer surface of the tool bar is fixed with The inner wall of the sleeve is connected, the head of the cutter bar is connected with the outer surface of the hinge shaft, and the hinge shaft is connected with the shaft center of the end face automatic knife and the ball cage knife at one end away from the cutter rod, and the inner walls of the end face automatic knife and the ball cage knife are both An annular groove is provided, the inner wall of the annular groove is connected with the outer surface of the connecting rod, the front end of the tool telescopic control connecting rod is connected with the end of the connecting rod, and the inlet of the differential case is respectively connected with the outer surface of the end face automatic knife and the ball cage knife .

Preferably, a protective cover is connected to the inner wall of the working cavity, and the protective cover is located on the right side of the fixed sleeve.

Preferably, the inner wall of the protective cover is connected with a limit bolt, and the end of the limit bolt is connected with the inner wall of the right side of the turret.

Preferably, the tool telescopic hydraulic cylinder and the outer wall of the gasket are connected to the inner wall of the protective cover.

Preferably, the differential case is located on the left side of the turret.

Preferably, both the end face automatic knife and the ball cage knife are located on the left side of the fixed sleeve.

The utility model provides a hydraulic retractable cutter. Has the following beneficial effects:

(1) The hydraulically driven retractable tool can automatically expand and contract to produce a lantern-like inner cavity.

(2) The hydraulically driven retractable tool realizes automatic retraction by programming with the help of general machine tool power, which can greatly reduce investment risks and investment costs.

(3) The hydraulically driven retractable tool can process the curved surface shape by numerical control programming, with high precision and can realize various high-precision curved surface processing by modifying the program.

(4) This hydraulically driven retractable tool can be used to complete the inner spherical surface, end surface, planetary wheel shaft hole, lock pin hole, half shaft hole and installation in one process in terms of processing automobile differential housing. The outer circle of the bearing part can be said to be the key dimension item of the part completed in one process, which greatly reduces the position accuracy deviation caused by multiple clamping.

(5) The hydraulically driven retractable tool has high machining accuracy, stability and reliability, and is suitable for mass production.

(6) The hydraulically driven retractable tool is applied on general machine tools and is suitable for product upgrading brought about by the rapid progress of science and technology in today's society.

Description of drawings

Fig. 1 is the sectional view of the utility model ball cage knife;

Fig. 2 is the sectional view of the utility model end face automatic knife;

FIG. 3 is a cross-sectional view of the differential case of the present invention.

In the picture: 1 turret, 2 differential case, 3 hinge shafts, 4 connecting rods, 5 annular grooves, 6 cutter bars, 7 fixed sleeves, 8 working chambers, 9 limit bolts, 10 protective covers, 11 end face automatic knives , 12 tool telescopic control link, 13 tool telescopic hydraulic cylinder, 14 gasket, 15 ball cage knife.

Detailed ways

As shown in Figures 1-3, the present utility model provides a technical solution: a hydraulic retractable cutter, comprising a turret 1, a differential case 2, a hinge shaft 3, a connecting rod 4, a cutter bar 6, a fixed sleeve 7. Working chamber 8, end face automatic knife 11, tool telescopic control link 12, tool telescopic hydraulic cylinder 13, gasket 14 and ball cage knife 15, the inner wall of the turret 1 is fixedly connected with the outer wall of the working chamber 8, the fixed sleeve 7 The outer wall is fixedly connected with the outer wall of the working chamber 8 , the output end of the tool telescopic hydraulic cylinder 13 is fixedly connected with the right side of the tool telescopic control link 12 , and the outer surface of the tool telescopic control link 12 is movably connected with the inner wall of the gasket 14 , the left side of the tool telescopic control link 12 is fixedly connected with the right side of the tool bar 6, the outer surface of the tool bar 6 is movably connected with the inner wall of the fixed sleeve 7, the head of the tool bar 6 is connected with the outer surface of the hinge shaft 3 Actively connected, the hinge shaft 3 is movably connected to the shaft centers of the end face automatic knife 11 and the ball cage knife 15 at the end away from the cutter bar 6, and the inner wall of the end face automatic knife 11 and the ball cage knife 15 is provided with an annular groove 5, and the annular groove The inner wall of 5 is movably connected with the outer surface of the connecting rod 4, the front end of the tool telescopic control connecting rod 12 is hinged with the end of the connecting rod 4, and the inlet of the differential case 2 is respectively connected with the outer surfaces of the end face automatic knife 11 and the ball cage knife 15. Active connection.

Further, a protective cover 10 is movably connected to the inner wall of the working chamber 8 , and the protective cover 10 is located on the right side of the fixed sleeve 7 .

Further, the inner wall of the protective cover 10 is threadedly connected with the limiting bolt 9, and the end of the limiting bolt 9 is threadedly connected with the inner wall of the right side of the turret 1.

Further, the outer walls of the tool telescopic hydraulic cylinder 13 and the gasket 14 are movably connected with the inner wall of the protective cover 10 .

Further, the differential case 2 is located on the left side of the turret 1 .

Further, both the end face automatic knife 11 and the ball cage knife 15 are located on the left side of the fixed sleeve 7 .

A method for machining a differential case, the cutter is hidden inside the cutter bar 6 when feeding, and the cutter bar 6 enters the differential case 2 through the machined half-shaft gear hole in the differential case 2, After the tool is in place, the tool telescopic hydraulic cylinder 7 pushes the tool 1 out through the connecting rod 4. Because the tool rotates around the hinge shaft 3 in the tool bar 6, and the connecting rod 4 moves inside the annular groove 5, the trajectory of the tool movement is determined, so that the tool can be moved. The cutter head rotates in the differential case 2 to process the inside of the differential case 2, and then the cutter telescopic hydraulic cylinder 13 drives the cutter telescopic control link 12 to return to the starting position, and the cutter retracts the cutter. Inside the rod 6, the cutter rod 6 exits the workpiece, and the cutter is divided into an end face automatic cutter 11 and a ball cage cutter 15. The operator can replace the model of the cutter installed on the turret 1 at any time, because it is attached to the turret 1 and fastened with bolts. connected, so the turret 1 can rotate freely to change the tool.

To sum up, when the utility model feeds the tool, the tool is hidden inside the tool bar 6, and the tool bar 6 enters the differential housing 2 through the machined half shaft gear hole in the differential housing 2, and after it is in place , the tool telescopic hydraulic cylinder 7 pushes the tool 1 out through the connecting rod 4, because the tool rotates around the hinge shaft 3 on the tool bar 6, and the connecting rod 4 moves inside the annular groove 5, so as to determine the trajectory of the tool movement and make the tool The head rotates in the differential housing 2 to process the inside of the differential housing 2, and then the tool retracting hydraulic cylinder 13 drives the tool retracting control link 12 to return to the starting position, and the tool retracts the tool bar 6 Inside, the tool bar 6 is withdrawn from the workpiece, and the machining accuracy reaches the processing level of the multi-axis CNC lathe, but the cost is far lower than that of the multi-axis CNC lathe, and the purpose of saving the cost is significant. Tool 15, the operator can replace the model of the tool installed on the turret 1 at any time, because it is attached to the turret 1 and fastened with bolts, so the turret 1 can rotate freely to replace the tool, thereby avoiding machining in the differential case. Due to tool wear, it cannot guarantee the tightness of the assembly with the corresponding parts.

Claims (3)

1. The utility model provides a scalable cutter of fluid pressure type, includes turret (1), differential case (2), hinge (3), connecting rod (4), cutter arbor (6), fixed cover (7), working chamber (8), terminal surface from dynamic knife (11), the flexible control connecting rod of cutter (12), the flexible pneumatic cylinder of cutter (13), gasket (14) and ball cage sword (15), its characterized in that: the inner wall of the cutter tower (1) is connected with the outer wall of the working cavity (8), the outer wall of the fixed sleeve (7) is connected with the outer wall of the working cavity (8), the output end of the cutter telescopic hydraulic cylinder (13) is connected with the right side face of the cutter telescopic control connecting rod (12), the outer surface of the cutter telescopic control connecting rod (12) is connected with the inner wall of the gasket (14), the left side face of the cutter telescopic control connecting rod (12) is connected with the right side face of the cutter bar (6), the outer surface of the cutter bar (6) is connected with the inner wall of the fixed sleeve (7), the head of the cutter bar (6) is connected with the outer surface of the hinge shaft (3), one end of the hinge shaft (3) far away from the cutter bar (6) is respectively connected with the axle centers of the end face automatic cutter (11) and the ball cage cutter (15), the inner walls of the end face automatic cutter (11) and the ball cage cutter (15) are both provided with the annular groove (5), the front end of a cutter telescopic control connecting rod (12) is connected with the tail end of a connecting rod (4), and the inlet of a differential case (2) is respectively connected with the outer surfaces of an end face automatic cutter (11) and a ball cage cutter (15); the inner wall of the working cavity (8) is connected with a protective cover (10), and the protective cover (10) is positioned on the right side of the fixed sleeve (7); the inner wall of the protective cover (10) is connected with a limiting bolt (9), and the tail end of the limiting bolt (9) is connected with the inner wall of the right side of the turret (1); the outer walls of the cutter telescopic hydraulic cylinder (13) and the gasket (14) are connected with the inner wall of the protective cover (10).

2. The hydraulic retractable tool of claim 1, wherein: the differential case (2) is positioned on the left side of the knife tower (1).

3. The hydraulic retractable tool of claim 1, wherein: the end face automatic knife (11) and the ball cage knife (15) are both positioned on the left side of the fixed sleeve (7).

Images