KR100442321B1 - A Main Spindle Cratridge Fixing Device Of A Boring Machine - Google Patents

Abstract

The present invention is fixedly assembled to the front end of the spindle head body, a hollow shaft-shaped wedge housing having a clamp hydraulic line therein; A stopper provided on an inner circumferential surface of the wedge housing and facing the clamp hydraulic line; A clamp wedge provided at both sides of the stopper and having a tapered ring-shaped inner ring and an outer ring tapered in a direction opposite to the inner ring and coupled to an outer side of the inner ring in a pair; Moving pistons provided at both sides of the clamp wedge to push the outer ring to move linearly; A fixed space provided on an inner circumferential surface of the wedge housing and fixing one side of the inner ring at both sides thereof; And a guide bush provided on both sides of the fixing space and having a pressure resistant medium space formed on an outer circumferential surface thereof, and having a nipple penetrating through the wedge housing to fill the medium in the pressure resistant medium space. A spindle cartridge fixing device of a machine.

Description

A spindle spindle fixing device of boring machine {A Main Spindle Cratridge Fixing Device Of A Boring Machine}

The present invention relates to a feed shaft clamping device of a boring machine, and more particularly, a feed shaft (W axis; protrusion of boring spins) for moving a spindle in an axial direction in a boring machine of a cartridge type quill (hollow shaft; QUILL) type. and a spindle cartridge fixing device of a boring machine to a clamping device of a protrusion).

Conventional boring machine lacks the rigidity to carry out the actual cutting work by biting the tool in the spindle structure, the cutting capacity is severely degraded in the state protruded a lot of boring spins, the W-axis stroke could not be sufficiently used to cut the workpiece.

In particular, in recent years, the demand for high rigidity spindles is increasing due to the increase in the demand for high precision and high precision machining, the increase in die-related cutting operations and the development of tool manufacturing techniques. Therefore, the conventional boring machine has to solve the problem of lowering the cutting force during spindle extrusion.

Conventional boring machines have a milling spindle assembled to a spindle bearing on the spindle head body, and the boring spindles assembled inside the milling spindle rotate together with the milling spindle and slide in the axial direction of the spindle. (W-axis feed).

Therefore, the conventional boring machine has a structure in which the boring spins, which bite the tool and perform the cutting operation, slide inside the milling spindles, so that the structural rigidity is weak. And since the boring spindles themselves are axially moving and rotating at the same time, it is not easy to fix the boring spindles. Some boring spindles have an automatic clamping structure, but it is almost impossible to show satisfactory operation and reliable machining results. There was no.

For this reason, in conventional boring machines, the cutting capacity is limited due to vibration problems caused by vibration during heavy cutting when the spindle is protruded a lot. Therefore, the ability of the main shaft motor cannot be fully used in the entire W-axis stroke. There was a problem.

Accordingly, the present invention has been made in view of the above-described conventional problems, and the first object of the present invention is to adopt a clamp structure in the cartridge type spindle, to compensate for the rigidity of the spindle and to protrude the spindle for cutting. In this case, to provide a spindle cartridge fixing device of the boring machine to minimize the deformation of the spindle.

The second object of the present invention is to provide a spindle cartridge fixing device for boring machines that meets the needs of customers by solving the problem of lowering the cutting force during spindle extrusion of existing boring machines by greatly increasing the rigidity of the spindles.

In addition, the third object of the present invention is to solve the problem of lowering the cutting force during spindle extrusion by increasing the rotational speed of the spindle, and to meet the increasing use of the latest high-precision, high-precision machining and high-quality mold processing, and the use of the latest cutting-edge tools. In order to provide a spindle cartridge fixing device of a boring machine that can adopt a high rigidity spindle.

The object of the present invention is a clamp / unclamp device of a boring machine installed in a spindle head body such that a spindle cartridge having a rotationally driven main shaft therein linearly moves in the longitudinal direction of the main shaft, the front end of the spindle head body. A hollow shaft-shaped wedge housing fixedly assembled and having a clamp hydraulic line formed therein; a stopper provided on an inner circumferential surface of the wedge housing and facing the clamp hydraulic line; and provided at both sides of the stopper, and having a tapered ring shape. A clamp wedge having an inner ring and an outer ring tapered in a direction opposite to the inner ring, and coupled to a pair of outer rings coupled to an outer side of the inner ring; respectively provided on both sides of the clamp wedge to push the outer ring to move linearly. A moving piston; provided on an inner circumferential surface of the wedge housing, and each side of the inner ring Fixing spaces fixed on each side; and guide bushes provided with both sides of the fixing space, respectively, the pressure-resistant medium is formed on the outer peripheral surface, the nipple penetrates through the wedge housing to fill the medium in the pressure-resistant medium space It is achieved by the spindle cartridge fixing device of the boring machine comprising a.

In addition, the inner ring of the clamp wedge is characterized in that a plurality of slot grooves are formed on the circumferential surface, and the medium filled in the guide bush is grease, and the grease is press-fitted into the outer circumferential surface of the spindle cartridge and the guide bush. It is characterized by adjusting the gap.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

1 is a structural diagram of a spindle head of a cartridge type boring machine according to the present invention,

Figure 2 is a detailed view of the spindle cartridge fixing device of the boring machine according to the present invention,

3 is a detailed separation configuration of the clamp wedge separated by the inner ring and the outer ring according to the present invention,

3a is a side view of a clamp wedge coupled to an inner ring and an outer ring according to the present invention;

Figure 3b is a plan view of the clamp wedge coupled to the inner ring and the outer ring according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: spindle head body 20: spindle cartridge

30: spindle 40: motor housing

50: Ball screw bracket 60: W axis ball screw

80: built-in spindle motor 90: W-axis servo motor

100: wedge housing 110: clamp wedge

112: outer ring 114: inner ring

115: slot groove 120: moving piston

130: fixed space 140: stopper

150: guide bush 152: space for the pressure-resistant medium

160: nipple 170: tool

210: clamp hydraulic line 220: unclamp hydraulic line

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a structural diagram of a cartridge type boring machine spindle head according to the present invention, Figure 2 is a detailed view of the spindle cartridge fixing device of the boring machine according to the present invention.

1 and 2, the spindle transfer structure of the present invention transfers a cartridge in which the spindle holding the tool 170 is integrated in a quill (hollow axis; QUILL) in its axial direction (W axis). It has a structure of the spindle cartridge 20 type. The spindle cartridge 20 is fitted in the wedge housing 100 of the hollow shaft shape, the wedge housing 100 is fixedly assembled to the front end of the spindle head body (10). The clamp hydraulic line 210 is formed inside the wedge housing 100, and the unclamp hydraulic line 220 is formed at both sides of the clamp hydraulic line 210.

The spindle 30, which is rotating in the spindle cartridge 20, is coupled to the built-in spindle motor 80 through a motor housing 40, so that the rotational movement of the spindle 30 is built in. Directly received from the spindle motor 80, the motor housing 40 is fixed to the ball screw bracket (50).

Since the ball screw bracket 50 is connected to the nut of the W-axis ball screw 60, one side of the W-axis servo motor 90 is coupled to the coupling of the W-axis ball screw 60 end. As a command, the spindle cartridge 20 performs a transfer operation in the axial direction (W axis) of the spindle 30.

In addition, the clamp wedge 110, the moving piston 120, and the fixing space 130, which are components for the cartridge clamp and unclamp operation, inside the wedge housing 100 fixedly assembled at the front end of the spindle head body 10. ), The stopper 140, the guide bush 150, and the like are assembled, and the spindle cartridge 20 is inserted into the structure in which the spindle cartridge 20 slides in the axial direction (W axis).

The stopper 140 is provided on the inner circumferential surface of the wedge housing 100 and is provided at a corresponding position facing the clamp hydraulic line 210. Clamp wedges 110 are provided at both sides of the stopper 210, and the clamp wedges 110 are tapered in the opposite direction from the inner ring 114 and the inner ring 114, and the inner ring 114 is tapered. The outer ring 112, which is coupled to the outside of the ring 114, is combined in a pair. Both sides of the clamp wedge 110 configured as described above are provided with a moving piston 120 for pushing linearly the outer ring 112, respectively. In addition, a fixing space 130 for fixing one side of the inner ring 114 on both sides is provided to face the unclamp hydraulic line 220 on the inner circumferential surface of the wedge housing 100.

In addition, both sides of the fixing space 130 is provided with a guide bush 150, the pressure-resistant medium space 152 is formed on the outer peripheral surface of the guide bush 150, penetrated through the wedge housing 100 The nipple 160 for filling the medium into the pressure resistant medium space 152 is provided.

Figure 3 is a detailed separation configuration of the clamp wedge separated by the inner ring and the outer ring according to the present invention, Figure 3a is a side view of the clamp wedge coupled to the inner ring and the outer ring according to the present invention, Figure 3b Inner ring and outer ring according to the plan view of the coupled clamp wedge.

3, 3a, 3b looks at the clamp operation and the unclamp operation of the spindle cartridge according to the present invention in detail.

Here, when the clamp operation of the spindle cartridge 20, when the hydraulic pressure is first supplied to the clamp hydraulic line 210, the outer two moving piston 120 is assembled to the outside of the stopper 140 and the stopper 140 The hydraulic pressure is supplied to the space formed therein to push the outer ring 112 of the clamp wedge 110 outward.

At this time, since the inner ring 114 of the clamp wedge 110 is fixed by the fixing space 130, the inner ring 114 of the clamp wedge 110 is contracted in the radial direction and the spindle cartridge 20 ) To fix the outer surface. In addition, a plurality of slot grooves 115 are formed on the circumferential surface of the inner ring 114 so that the inner ring 114 of the clamp wedge 110 can be easily contracted in the radial direction.

In addition, when the unclamping operation of the spindle cartridge 20 supplies hydraulic pressure to the unclamp hydraulic line 220, the moving piston 120 is assembled to the outside of the two fixed spaces 130 and the fixed space 130. Hydraulic pressure is supplied to the space formed by the side surface of the back side. When the moving piston 120 is pushed inward by the pressure at this time, the cartridge unclamp operation is performed in contrast to the clamp operation.

In addition, the guide bush 150 is positioned outside the two fixed spaces 130 so as to guide the transfer in the axial direction (W axis) of the spindle cartridge 20. At this time, the guide bush 150 has a space for the pressure-resistant medium 152 is processed on the outer circumferential surface, and fills the medium through the nipple 160 that can fill the medium in the pressure-resistant medium 152. It is also possible to control the pressure of the feed medium. Here, grease is used as the medium.

Therefore, it is possible to adjust the appropriate clearance between the outer surface of the spindle cartridge 20 and the guide bush 150 during assembly. In addition, even when the gap between the outer surface of the guide bush 150 and the spindle cartridge 20 increases due to the wear of the guide bush 150 during long-term use, it can be readjusted to the appropriate gap again, which is useful for maintaining the accuracy and maintenance of the equipment. It has a structure that can be used.

As described above, according to the spindle cartridge fixing device of the boring machine according to the present invention, by adopting a clamp structure to the cartridge-type spindle, to compensate for the rigidity of the spindle 30 and to protrude the spindle 30 for cutting Edo can provide a spindle cartridge fixing device of the boring machine to minimize the deformation of the spindle (30).

In addition, by dramatically increasing the rigidity of the spindle 30, to solve the problem of cutting force degradation when machining the spindle 30 of the existing boring machine to provide a spindle cartridge fixing device of the boring machine to meet the needs of customers. It became.

In addition, by increasing the rotational speed of the spindle 30 to solve the problem of cutting force degradation during spindle 30 extrusion processing, to meet the increasing use of the latest high-precision, high-precision machining and high-quality mold processing, the latest cutting-edge tools In order to provide a spindle cartridge fixing device of the boring machine that can adopt the high rigidity spindle (30).

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

Claims (3)

In the clamping / unclamping device of a boring machine installed in the spindle head body 10 such that the spindle cartridge 20 having a rotationally driven spindle 30 therein moves linearly in the longitudinal direction of the spindle 30. A hollow shaft-shaped wedge housing 100 fixedly assembled at the front end of the spindle head body 10 and having a clamp hydraulic line 210 therein; A stopper 140 provided on an inner circumferential surface of the wedge housing 100 and facing the clamp hydraulic line 210; The tapered ring-shaped inner ring 114 and the outer ring 112 tapered in the opposite direction to the inner ring 114 and coupled to the outer side of the inner ring 114 are provided on both sides of the stopper 140. Clamp wedge 110 is combined in a pair; Moving pistons 120 respectively provided at both sides of the clamp wedge 110 to push the outer ring 112 to move linearly; A fixing space 130 provided on an inner circumferential surface of the wedge housing 100 and fixing one side of the inner ring 114 at both sides; Nipples 160 are provided on both sides of the fixing space 130 and have a pressure-resistant medium space 152 formed on an outer circumferential surface thereof, and penetrate the wedge housing 100 to fill the medium in the pressure-resistant medium space 152. Spindle cartridge fixing device of a boring machine comprising a ;; guide bush 150 having a. delete The boring medium of claim 1, wherein the medium filled in the guide bush 150 is grease, and the gap is formed between the outer peripheral surface of the spindle cartridge 20 and the gap between the guide bush 150 by pressing the grease. Spindle cartridge holder of the machine.