CN203664794U

CN203664794U - Clamping device for accessory of milling spindle

Info

Publication number: CN203664794U
Application number: CN201320799625.XU
Authority: CN
Inventors: 王潇; 桂林; 乐琦; 袁利亚; 赵明
Original assignee: Wuhan Heavy Duty Machine Tool Group Corp
Current assignee: Wuhan Heavy Duty Machine Tool Group Corp
Priority date: 2013-12-06
Filing date: 2013-12-06
Publication date: 2014-06-25
Anticipated expiration: 2023-12-06

Abstract

The utility model relates to a clamping device for an accessory of a milling spindle. The clamping device comprises a lower cover, two or more oil cylinders, pistons, guide pins, pressure springs, end covers, sealing rings, the accessory, a hydraulic system and the like, wherein the lower cover is arranged at the bottom of a ram; the oil cylinders are arranged on the lower cover; the pistons are arranged in the oil cylinder holes; the end covers are arranged outside the oil cylinder holes; the guide pins and the pressure springs are arranged between the pistons and the end covers; the clamping mechanisms between the accessory and the lower cover are the pistons; the upper part of the accessory is conical; the cross sections at one ends of the pistons are circular conical surfaces which can be closely clung to the accessory; a cutter pull oil pipeline and a cutter release oil pipeline are arranged in the lower cover; a clamping oil pipeline and a loosening oil pipeline are arranged at the inlets of the oil cylinders and on two sides of the pistons. The utility model has the benefits that the clamping device can greatly improve the stiffness of connection between the ram of the machining center of a vertical milling machine and the accessory, so that the overload cutting capacity of the machine tool is increased.

Description

Milling main shaft annex clamping device

Technical field

The utility model relates to a kind of annex clamp mechanism of lathe, is particularly useful for the clamping device of milling main shaft annex.

Background technology

Lathes more both domestic and external at present, its annex clamps the general Hydrodock pulling claw tension that adopts 7 to 24 taper shank tensions or adopt BERG, but because these structure coupling stiffnesses are low, can not adapt to the requirement to heavy load cutting in modern machine processing.

Summary of the invention

The purpose of this utility model is in lathe heavy load working angles, and the problem of its middle existence that is rigidly connected provides a kind of annex clamp mechanism of lathe, the coupling stiffness while being arranged on lathe to improve all kinds of annexes.

The said milling main shaft of the utility model annex clamping device, comprises the compositions such as lower cover, oil cylinder, piston, guide finger, spring, end cap, sealing ring, annex, hydraulic system.Adopt technical scheme be: lower cover is arranged on the bottom of ram, under cover the oil cylinder being provided with more than 2 or 2, in each oil har opening, be provided with piston, oil har opening is outside equipped with piston end cap, is provided with guide finger and compression spring between piston and end cap; Clamp mechanism between annex and lower cover is piston; It is conical that annex top is, and the cross section of piston one end is the taper seat that can fit tightly with annex.Broaching tool oil circuit pipeline and loose cutter oil circuit pipeline are arranged on the inside of lower cover, clamp oil circuit pipeline and loosen the entrance of oil circuit pipeline in oil cylinder the both sides that lay respectively at piston; The clamping of said annex clamping device puts in place and loosens to put in place and adopts pressure switch control; The harvester pressure switch of the pressure signal that the hydraulic system of this clamping device also comprises by clamping oil circuit, loosen pressure dwelling loop and clamping that reversal valve, hydraulic control one-way valve, choke valve that oil circuit carrys out oil pipeline form, loosen cutter spacing.

The beneficial effects of the utility model are: this annex clamp mechanism can significantly improve the coupling stiffness between ram and the annex of vertical milling vehicle machining center, have improved the heavily loaded cutting power of lathe.

Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is hydraulic system johning knot composition of the present utility model;

Fig. 3 is one-piece piston;

Fig. 4 is Split piston.

Detailed description of the invention

By an embodiment with the milling main shaft annex clamping device of 4 oil cylinders, its structure and operation principle are specifically described below.

As shown in Figure 1, the said milling main shaft of the utility model annex clamping device, is arranged on the outer of milling main shaft, the end face of ram.Comprise lower cover 1, oil cylinder, piston 5, guide finger 3, spring 4, end cap 6, sealing ring 2, annex 7 and clamping oil circuit 10 pipelines, loosen the compositions such as oil circuit 9 pipelines.Lower cover 1 links together with the bottom of ram, is provided with 4 oil cylinders on four jiaos of lower cover 1, is provided with the clamping oil circuit 10 being connected with 4 oil cylinders and loosens oil circuit 9 in lower cover 1.Sealing ring 2 ' is contained on piston 5, and oil cylinder is divided into two relatively independent regions, clamp oil circuit 10 and loosen oil circuit 9 respectively with these two independently region be connected.End cap 6 is placed on lower cover 1, between lower cover 1 and end cap 6, is also provided with sealing ring 2 ".Guide finger 3 is arranged on end cap 6, by the pin-and-hole on piston 5, piston 5 is led.Spring 4 is placed in the centre of piston 5 and end cap 6, and spring 4 is all the time in compressive state.Can fit with lower cover 1 in the surface of annex 7, the taper seat 8 of piston 5 one end can fit tightly and contact with annex 7.Its operation principle is: when clamping after the logical oil of oil circuit 10, piston 5 is moved to the left, and piston 5 relies on conical surface that annex 7 is upwards pushed away, and after annex 7 and lower cover 1 are fitted, annex 7 is just fixed.When loosening after the logical oil of oil circuit 9, piston 5 moves right, and piston 5 disengages with annex 7, and annex 7 can be removed.

For protection annex can not fall the unexpected power-off of lathe in the situation that, in the present invention, design protective device, at the interior spring 4 of having installed of piston 5.After the unexpected power-off of lathe, spring 4 can also be pushed down piston 5 left, ensures that annex 7 can not come off because of deadweight.

As shown in Figure 2, hydraulic system of the present utility model comprises: clamp oil circuit 10 pipelines, loosen oil circuit 9 pipelines, commutate by reversal valve 11, reversal valve 11, hydraulic control one-way valve 12, choke valve 13 form pressure dwelling loop.A pressure switch 14 is for clamping the harvester of the pressure signal that puts in place, the harvester of this pressure signal has two contacts, can detect a high-voltage signal, a low-voltage signal, in the time that pressure dwelling loop produces leakage, pressure switch 14 also can detect, keeps oil pressure within the specific limits by repairing, avoid, because hydraulic leak causes the accident, having increased the security of mechanism.Another pressure switch 15 is for loosening the harvester of the pressure signal that puts in place.

Said piston 5 can be made one overall (as shown in Figure 3); For the convenience of sealing ring is installed, piston 5 also can be made (as shown in Figure 4) of split, and the piston 5 of split is made up of piston body 16 and briquetting 17, and piston body 16 and briquetting 17 can rely on and be threaded.The main body of piston is columniform, is provided with the mounting groove 18 for settling sealing ring on piston cylindrical outer surface.One end section of piston is conical surface, and its conical surface and annex can be fitted closely.

Claims

1. a milling main shaft annex clamping device, comprise lower cover, oil cylinder, piston, guide finger, spring, end cap, sealing ring, annex, hydraulic system composition, it is characterized in that, lower cover is arranged on the bottom of ram, under cover the oil cylinder being provided with more than 2 or 2, in each oil har opening, be provided with piston, oil har opening is outside equipped with piston end cap, is provided with guide finger and compression spring between piston and end cap; Clamp mechanism between annex and lower cover is piston; It is conical that annex top is, and the cross section of piston one end is the taper seat that can fit tightly with annex; Broaching tool oil circuit pipeline and loose cutter oil circuit pipeline are arranged on the inside of lower cover, clamp oil circuit pipeline and loosen the entrance of oil circuit pipeline in oil cylinder the both sides that lay respectively at piston.

2. according to the said milling main shaft of claim 1 annex clamping device, it is characterized in that, said hydraulic system comprises: clamp oil circuit, loosen oil circuit and oil pipeline, and the pressure dwelling loop of pressure switch, reversal valve, hydraulic control one-way valve, choke valve composition, one of them pressure switch is the harvester that clamps the pressure signal putting in place, and the harvester of this pressure signal has two contacts; Another pressure switch is the harvester that loosens the pressure signal that puts in place.

3. according to the said milling main shaft of claim 1 annex clamping device, it is characterized in that, said piston is one-piece piston.

4. according to the said milling main shaft of claim 1 annex clamping device, it is characterized in that, said piston is Split piston, and Split piston is made up of piston body and briquetting, and piston and briquetting are by being threaded.