CN202527969U - Fixture for processing thin-wall cylindrical part milling-machine milling hole - Google Patents

Abstract

The utility model provides a fixture for milling holes on a milling machine for thin-walled cylindrical parts, which can effectively solve the problems of complicated clamping and low efficiency existing in the milling and clamping of thin-walled cylindrical parts. Effectively guarantee the processing quality and processing accuracy of parts. It includes a bottom plate, which is fixed on the working surface of the milling machine, and is characterized in that it includes a rotating shaft, a workpiece clamping structure and an indexing device, a base is fixed on the bottom plate, the rotating shaft passes through the base, and is limited by the bearing and the axial direction. The mechanism is installed on the base, and the workpiece clamping structure and the indexing device are respectively installed on the rotating shaft and on both sides of the base.

Description

A jig for milling holes on a milling machine for thin-walled cylindrical parts

technical field

The utility model relates to the technical field of milling processing tooling for thin-walled revolving parts, in particular to a fixture for milling holes on a milling machine for thin-walled cylindrical parts.

Background technique

The workpiece clamping method of the milling machine adopts different clamping methods according to the different styles of the parts to be processed. Generally, for the clamping of rotary parts, the three-jaw chuck is usually pressed on the milling machine table first, or the indexing The head is installed on the work table of the milling machine, and then the parts are clamped for processing. The clamping is complicated and the efficiency is low; and because the thin-walled rotary parts are easily deformed by force during the clamping process, which affects the shape and position tolerance, and affects The precision requirements of the parts, and due to the thin wall of the parts, the rigidity is poor during processing, and it is easy to generate vibration, which affects the surface roughness of the parts, resulting in the generation of waste products.

Contents of the invention

In view of the above problems, the utility model provides a fixture for milling holes on a milling machine for thin-walled cylindrical parts, which can effectively solve the existing problems of complex clamping and low efficiency when milling holes for thin-walled cylindrical parts. problems, and can effectively guarantee the processing quality and processing accuracy of parts.

Its technical solution is as follows: it includes a bottom plate, which is fixed on the working surface of the milling machine, and is characterized in that it includes a rotating shaft, a workpiece clamping structure and an indexing device, a base is fixed on the bottom plate, and the rotating shaft pass through the base and be installed on the base through bearings and an axial limit mechanism, the workpiece clamping structure and the index device.

It is further characterized by:

The axial limit mechanism includes end caps and limit sleeves on both sides, the bearings are press-fitted on the base through the end covers on both sides, and the limit sleeve is fitted on the installation end of the indexing device of the rotating shaft. The rotating shaft and the limiting sleeve are connected by a flat key, and the limiting sleeve is axially compressed by a washer and a lock nut;

The workpiece clamping structure includes a positioning plate, an expansion sleeve and a taper sleeve. The positioning plate is fixed to the rotating shaft by bolts. The rotating shafts are axially fixed by two locking nuts, the expansion sleeve is fitted on the outer circumference of the taper sleeve, and the inner peripheral surface of the expansion sleeve matches the conical surface of the outer peripheral surface of the taper sleeve;

The indexing device includes an indexing plate, an indexing rod, an indexing handle and an indexing taper pin, and the indexing plate is fixed on the base after passing through the limiting sleeve outside the rotating shaft. There is an indexing taper hole on the indexing plate, and the indexing rod is fixed on the rotating shaft through the flat key and axially fixed on the washer by the locking nut one, and the indexing taper pin is installed on the The axial mounting hole of the indexing handle, the tail of the indexing taper pin is connected with a taper pin through a connecting rod, the connecting rod passes through the end cover one, and the end cover one is fixed on the indexing handle, so A spring is set on the outside of the connecting rod, and the two ends of the spring are respectively fixed on the indexing taper pin and the end cap. The indexing handle is vertically installed on the indexing rod and passes through the end cap two axial position.

The utility model adopts a fixture for milling holes of thin-walled cylindrical parts milling machine, and its beneficial effect is that it is integrally installed on the working table of the milling machine by the bottom plate, and the workpiece clamping structure and the indexing device are all installed on the rotating shaft. The workpiece is clamped by the workpiece clamping structure and directly indexed and positioned by the indexing device, so the workpiece is conveniently clamped and positioned reliably, which can effectively improve the processing efficiency; when the workpiece is clamped, it is directly placed on the outer circumference of the expansion sleeve and positioned by The plate and the locking nut 2 are axially positioned, and the locking nut 2 pushes the taper sleeve to move axially to the side of the positioning plate while the lock nut 2 is axially locked. Since the outer circumference of the taper sleeve cooperates with the conical surface of the inner circumference of the expansion sleeve, the expansion sleeve is pushed The workpiece is expanded radially, which can ensure the full contact between the expansion sleeve and the inner wall of the workpiece, the workpiece can be clamped reliably, and the clamping deformation of the workpiece can be effectively reduced, the rigidity of the workpiece processing can be improved, and the influence of processing vibration on the workpiece can be reduced. Improve the machining accuracy and quality of the workpiece.

Description of drawings

Fig. 1 is a schematic diagram of the fixture structure of the utility model for milling holes on a milling machine for thin-walled cylindrical parts.

Detailed ways

See Fig. 1, the fixture of this utility model is used for the milling processing of thin-walled cylindrical parts milling machine, and it comprises base plate 1, and base plate 1 is fixed on the working surface 31 of milling machine, and it also comprises rotating shaft 5, workpiece clamping structure and branch The base plate 1 is fixed with a base 21 through bolts 2 and taper pins 3. The rotating shaft 5 passes through the base 21 and is installed on the base 21 through the bearing 20 and the axial limit mechanism. The rotating shaft 5 is located on the base The both sides of 21 are equipped with workpiece clamping structure and indexing device respectively. The axial limit mechanism includes end caps 19, 22 on both sides and a limit sleeve 8. The bearing 20 is press-fitted on the base 21 through the end caps 19, 22 on both sides, and the end caps 19, 20 on both sides are fixed on the base by bolts 23. Seat 21, the installation end of the indexing device of the rotating shaft 5 is fitted with a limit sleeve 8, the rotating shaft 5 and the limit sleeve 8 are connected by a flat key 7, and the limit sleeve 8 is axially compressed by the washer 6 and the lock nut-4; The workpiece clamping structure includes a positioning plate 24, an expansion sleeve 27 and a taper sleeve 28. The positioning plate 24 is fixed on the rotating shaft 5 by bolts 25. The outside of the positioning plate 24 and the outer periphery of the rotating shaft 5 are fitted with a tapered sleeve 28. Between the taper sleeve 28 and the rotating shaft 5 Axially fixed by the lock nut 29, the expansion sleeve 27 is set on the outer circumference of the taper sleeve 28, and the inner peripheral surface of the expansion sleeve 27 cooperates with the conical surface of the outer peripheral surface of the taper sleeve 28; the indexing device includes an indexing plate 18, an indexing rod 15. The indexing handle 14 and the indexing cone pin 17, the indexing plate 18 passes through the limit sleeve 8 outside the rotating shaft 5 and is fixed on the base 21, the indexing plate 18 has an indexing cone hole, and the indexing rod 15 Fixed on the rotating shaft 5 by the flat key 7 and axially fixed by the lock nut 4 and the washer 6, the indexing cone pin 17 is installed in the axial installation hole of the indexing handle 14, and the tail of the indexing cone pin 17 is connected by the connecting rod 10 There is a taper pin 9, the connecting rod 10 passes through the end cover 12, and the end cover 12 is fixed to the indexing handle 14 through the bolt 11. The outside of the connecting rod 10 is equipped with a spring 13, and the two ends of the spring 13 are respectively fixed on the indexing taper pin 17 and end cap one 12, the indexing handle 14 is vertically installed on the indexing rod 15 and axially positioned by end cap two 16. Among Fig. 1, 26 is the thin-walled tubular workpiece to be processed, and 30 is a milling cutter.

Claims (4)

1. A fixture for milling holes on a milling machine for thin-walled cylindrical parts, comprising a base plate fixed to the worktable of a milling machine, characterized in that: it comprises a rotating shaft, a workpiece clamping structure and an indexing device, the A base is fixed on the bottom plate, the rotating shaft passes through the base, and is installed on the base through a bearing and an axial limit mechanism. On the rotating shaft, two sides of the base are respectively installed The workpiece clamping structure and the indexing device. 2. A jig for milling holes on a milling machine for thin-walled cylindrical parts according to claim 1, wherein the axial limit mechanism includes end covers and limit sleeves on both sides, and the bearing passes through The end covers on both sides are press-fitted on the base, the installation end of the indexing device of the rotating shaft is fitted with a limit sleeve, and the rotating shaft and the limit sleeve are connected by a flat key, and the limit sleeve is passed through The washer is compressed axially with the lock nut. 3. A fixture for milling holes on a milling machine for thin-walled cylindrical parts according to claim 2, wherein the workpiece clamping structure includes a positioning plate, an expansion sleeve and a taper sleeve, and the positioning plate passes through Bolts are fixed on the rotating shaft, the outside of the positioning plate and the outer circumference of the rotating shaft are fitted with the taper sleeve, the taper sleeve and the rotating shaft are axially fixed by lock nuts, and the expansion sleeve is fitted on the The outer circumference of the taper sleeve, the inner peripheral surface of the expansion sleeve is matched with the conical surface of the outer peripheral surface of the taper sleeve. 4. A jig for milling holes on a milling machine for thin-walled cylindrical parts according to claim 3, wherein the indexing device includes an indexing plate, an indexing rod, an indexing handle and an indexing cone pin, the indexing plate is fixed on the base after passing through the limiting sleeve outside the rotating shaft, the indexing plate has an indexing taper hole, and the indexing rod passes through the flat key It is fixed on the rotating shaft and axially fixed with the washer through the lock nut one, the indexing taper pin is installed in the axial installation hole of the indexing handle, and the tail of the indexing taper pin passes through the connecting rod Connected with a taper pin, the connecting rod passes through the end cover one, the end cover one is fixed on the indexing handle, the outside of the connecting rod is covered with a spring, and the two ends of the spring are respectively fixed on the indexing handle The taper pin and the end cover one, the indexing handle is vertically installed on the indexing rod and positioned axially through the end cover two.