CN205798983U - For processing the vertical process center fixture of bearing block radial hole - Google Patents

Abstract

A vertical machining center fixture for machining radial holes of bearing seats, comprising a positioning device and a clamping device, the positioning device includes a vertical plate (2), a positioning step shaft (3), a washer (4), a fixing nut (5 ), the anti-rotation pin (6) and the bottom plate (7); the middle part of the positioning step shaft (3) is set with a hollow cylinder Ⅰ (3-2) and a hollow cylinder Ⅱ ( 3-3) and hollow cylinder III (3-4); the anti-rotation pin (6) is embedded in the vertical plate (2) until the anti-rotation pin contacts the pin hole of the hollow cylinder III; the clamping device includes an opening pressure plate (8) and the clamping nut (9), the opening pressing plate (9) is placed on the workpiece (1), and the outer diameter of the clamping nut is greater than the opening width of the opening pressing plate. The utility model can not only reduce the labor intensity of workers, improve production efficiency, realize automatic tapping, and ensure the machining accuracy of radial holes, but also is suitable for numerical control machining of radial holes on bearing seats of different sizes.

Description

Vertical Machining Center Fixtures for Machining Radial Holes of Bearing Blocks

technical field

The utility model relates to the field of mechanical processing, in particular to a milling machine processing fixture, in particular to a vertical machining center fixture for machining radial holes of bearing seats.

Background technique

At present, the radial hole processing on the bearing seat is mainly processed by a drilling machine. This processing method requires the design of a special drilling fixture for a vertical drilling machine for positioning, clamping and guiding of the workpiece. However, the special drilling fixture can only be used for processing parts of a certain size. Special purpose, when the size of similar parts changes, it is necessary to re-make another special drilling jig, and the redesign and manufacturing cycle is long and labor-intensive; in addition, the structure of the drilling jig is complex, and manual tapping is required after the workpiece is processed, and the process is scattered. The operation is labor-intensive, the production efficiency is low, the processing quality cannot be guaranteed, and rework often occurs.

Contents of the invention

The utility model provides a vertical machining center fixture for machining radial holes of bearing seats. The fixture can not only reduce the labor intensity of workers, improve production efficiency, realize automatic tapping, and ensure the machining accuracy of radial holes, but also is suitable for CNC machining of radial holes in bearing housings of different sizes.

In order to achieve the above purpose, a vertical machining center fixture for machining radial holes of bearing seats includes a positioning device and a clamping device. The positioning device includes a vertical plate, a positioning step shaft, a washer, a fixing nut, and an anti-rotation pin and the bottom plate; the vertical plate is vertically fixed on one end of the bottom plate, and the vertical plate is provided with a cylindrical hole for the positioning step shaft to pass through; the central axis of the positioning step shaft vertically runs through the vertical plate and the workpiece, and the two ends of the central axis are An external thread is provided, and a fixed nut is sleeved on the end of the central axis close to the vertical plate. A washer is arranged between the fixed nut and the vertical plate. The outer diameter of the washer is larger than the inner diameter of the cylindrical hole; Hollow cylinder I, hollow cylinder II and hollow cylinder III are set in the center in turn, the hollow cylinder I is located in the cylindrical hole and the outer diameter of the hollow cylinder I is consistent with the inner diameter of the cylindrical hole; the hollow cylinder II and the The vertical plates are in contact, the outer diameter of the hollow cylinder II is greater than the outer diameter of the hollow cylinder III, the hollow cylinder III is covered with a workpiece and the workpiece is against the hollow cylinder II; the hollow cylinder II and the hollow cylinder III are respectively threaded into the central shaft; the anti-rotation pins are embedded in the vertical plate until the anti-rotation pins are in contact with the pin holes of the hollow cylinder III; the clamping device includes an opening pressing plate and a clamping nut, and the opening pressing plate is placed On the workpiece, the outer diameter of the clamping nut is larger than the opening width of the opening pressing plate.

Further, a gasket is provided between the hollow cylinder II and the hollow cylinder III.

Further, a positioning ring is provided on the side of the hollow cylinder III close to the clamping device.

Preferably, the hollow cylinder I is integrated with the central axis.

Compared with the prior art, the utility model adopts the vertical machining center to realize the automation of radial drilling, milling and counterboring, and tapping of the bearing seat. The radial hole processing is completed in one clamping, which reduces the auxiliary time. The structure of the fixture is simple, which reduces the labor intensity of the operation, improves the work efficiency, and ensures the machining accuracy of the radial hole of the workpiece, and only needs to change the size of the hollow cylinder II and hollow cylinder III on the shaft of the positioning step to realize CNC automatic machining of radial holes of bearing housings of different sizes or automatic machining of other radial surfaces.

Description of drawings

Fig. 1 is the top view of the utility model;

Fig. 2 is a sectional view along line B-B in Fig. 1;

In the figure: 1, workpiece, 2, vertical plate, 3, positioning step axis, 3-1, central axis, 3-2, hollow cylinder Ⅰ, 3-3, hollow cylinder Ⅱ, 3-4, hollow cylinder Ⅲ, 4. Washer, 5. Fixed nut, 6. Anti-rotation pin, 7. Bottom plate, 8. Opening pressure plate, 9. Clamping nut, 10. Cylindrical hole, 11. Radial hole.

detailed description

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

As shown in Figures 1 and 2, a vertical machining center fixture for machining radial holes of bearing seats includes a positioning device and a clamping device. The positioning device includes a vertical plate 2, a positioning step shaft 3, a washer 4, Fixing nut 5, anti-rotation pin 6 and base plate 7; Described vertical plate 2 is vertically fixed on an end of base plate 7, and vertical plate 2 is provided with the cylindrical hole 10 that passes for positioning step shaft 3; Described positioning step shaft 3 The central axis 3-1 vertically runs through the vertical plate 2 and the workpiece 1, and the two ends of the central axis 3-1 are provided with external threads, and the end of the central axis 3-1 close to the vertical plate 2 is covered with a fixed nut 5, and the fixed nut 5 is connected to the vertical plate. A gasket 4 is arranged between the plates 2, and the outer diameter of the gasket 4 is larger than the inner diameter of the cylindrical hole 10;

The middle part of the positioning step shaft 3 is set with a hollow cylinder I3-2, a hollow cylinder II3-3 and a hollow cylinder III3-4 in turn around the central axis 3-1, and the hollow cylinder I3-2 is located in the cylinder In the hole 10 and the outer diameter of the hollow cylinder I3-2 is consistent with the inner diameter of the cylindrical hole 10; the hollow cylinder II3-3 is in contact with the vertical plate 2, and the outer diameter of the hollow cylinder II3-3 is greater than that of the hollow cylinder III3-4 The outer diameter of the hollow cylinder III3-4 is covered with the workpiece 1 and the workpiece 1 is against the hollow cylinder II3-3; the hollow cylinder II3-3 and the hollow cylinder III3-4 are respectively connected to the central axis 3- 1 thread socket; the anti-rotation pin 6 is embedded in the vertical plate 2 until the anti-rotation pin 6 contacts the pin hole of the hollow cylinder III3-4; the hollow cylinder II3-3 and the hollow cylinder III3-4 limit Of the 5 degrees of freedom of the workpiece 1, only the degree of freedom of rotation of the workpiece 1 around the central axis 3-1 is not limited, which meets the processing requirements of the radial hole of the workpiece 1; the clamping device includes an opening pressure plate 8 and a clamping nut 9, so The opening pressing plate 8 is placed on the workpiece 1, and the outer diameter of the clamping nut 9 is greater than the opening width of the opening pressing plate 8; the clamping nut 9 is used to clamp and loosen the workpiece 1 by using a wrench, and the opening structure of the opening pressing plate 8 The working stroke of clamping and loosening of the clamping nut 9 is greatly shortened, and the fast loading and unloading of the workpiece 1 is realized.

In order to make the contact between the hollow cylinder II3-3 and the hollow cylinder III3-4 tighter, a gasket is provided between the hollow cylinder II3-3 and the hollow cylinder III3-4.

In order to make the positioning stepped shaft 3 more stable during processing, a positioning ring is provided on the side of the hollow cylinder III3-4 close to the clamping device; the hollow cylinder I3-2 and the central shaft 3-1 are integrally structured .

Before processing, firstly use the vertical surface Q of the vertical plate 2 to align the fixture, and fix the fixture on the workbench of the vertical three-axis machining center through the bottom plate 7 and the pressure plate; use the top surface R of the vertical plate 2 to carry out the Z coordinate axis For tool setting, use the outer wall of the hollow cylinder III3-4 to perform tool setting on the X coordinate axis, and use the vertical surface Q to perform the Y coordinate axis to establish the reference zero point of the tool machining movement.

Then, the central axis 3-1 of the positioning step shaft 3 is vertically passed through the vertical plate 2, and the hollow cylinder I3-2 and the hollow cylinder II3-3 are respectively in contact with the cylinder hole 10 and the vertical plate 2, and the washer 4 sets on the end of the central axis 3-1 close to the vertical plate 2, and then tighten the fixed nut 5 on the end of the central axis 3-1 close to the vertical plate 2, so as to realize the positioning of the positioning step shaft 3 on the vertical plate 2; The inner diameter of the bearing seat to be processed is to select the size of the hollow cylinder II3-3 and the hollow cylinder III3-4, and the workpiece 1 is set on the hollow cylinder III3-4 and the workpiece 1 is against the hollow cylinder On II3-3, complete the correct positioning of the workpiece 1; put the opening pressure plate 8 on the workpiece 1, use a wrench to rotate the clamping nut 9 clockwise to compress the opening pressure plate 8, so as to realize the rapid clamping of the workpiece 1, and then ensure the bearing seat It will not loosen with the processing process, so as to ensure that its position remains unchanged, thereby ensuring the processing accuracy of the radial hole.

Finally, the machining center runs the radial hole numerical control program to complete the automatic machining of drilling, milling, sinking and tapping. After the machining is completed, use a wrench to rotate the clamping nut 9 counterclockwise to loosen the opening pressure plate 8 to realize the quick unloading of the workpiece. Lose. Then enter the processing cycle, that is, load the workpiece 1, clamp the workpiece 1, run the program to automatically process and unload the workpiece 1. As shown in FIG. 1 , the fixture can complete the numerical control machining of radial holes 11 on two workpieces 1 at the same time.

Claims (4)

1. A fixture of a vertical machining center for machining the radial hole of a bearing seat, comprising a positioning device and a clamping device, characterized in that, The positioning device includes a vertical plate (2), a positioning step shaft (3), a washer (4), a fixing nut (5), an anti-rotation pin (6) and a bottom plate (7); the vertical plate (2) is fixed vertically At one end of the bottom plate (7), the vertical plate (2) is provided with a cylindrical hole (10) for the positioning step shaft (3) to pass through; the central axis (3-1) of the positioning step shaft (3) runs through vertically Riser (2) and workpiece (1), the two ends of central shaft (3-1) are all provided with external thread, and the end of central shaft (3-1) near vertical board (2) is sleeved with fixed nut (5), A washer (4) is arranged between the fixed nut (5) and the vertical plate (2), and the outer diameter of the washer (4) is greater than the inner diameter of the cylindrical hole (10); The central part of the positioning step shaft (3) is successively set with a hollow cylinder I (3-2), a hollow cylinder II (3-3) and a hollow cylinder III (3-1) centered on the central axis (3-1). 4), the hollow cylinder I (3-2) is located in the cylindrical hole (10) and the outer diameter of the hollow cylinder I (3-2) is consistent with the inner diameter of the cylindrical hole (10); the hollow cylinder II (3 -3) In contact with the vertical plate (2), the outer diameter of the hollow cylinder II (3-3) is greater than the outer diameter of the hollow cylinder III (3-4), and the hollow cylinder III (3-4) is covered with The workpiece (1) and the workpiece (1) lean against the hollow cylinder II (3-3); the hollow cylinder II (3-3) and the hollow cylinder III (3-4) are respectively connected to the central axis (3 -1) threaded socket; the anti-rotation pin (6) is embedded in the vertical plate (2) until the anti-rotation pin (6) is in contact with the pin hole of the hollow cylinder III (3-4); The clamping device includes an opening pressing plate (8) and a clamping nut (9), the opening pressing plate (8) is placed on the workpiece (1), and the outer diameter of the clamping nut (9) is larger than that of the opening pressing plate (8 ) opening width. 2. A vertical machining center fixture for machining radial holes of bearing seats according to claim 1, characterized in that the hollow cylinder II (3-3) and the hollow cylinder III (3-4 ) with a spacer between them. 3. A vertical machining center fixture for machining radial holes of bearing seats according to claim 1 or 2, characterized in that the hollow cylinder III (3-4) is close to the side of the clamping device With positioning ring. 4. A vertical machining center fixture for machining radial holes of bearing seats according to claim 1 or 2, characterized in that the hollow cylinder I (3-2) and the central shaft (3-1 ) as an integral structure.