CN108972028A - A kind of CNC milling machine machining multiple degrees of freedom Auxiliary support - Google Patents

Abstract

A multi-degree-of-freedom auxiliary support for CNC milling machine machining, including Y-shaped supports, cylindrical rollers, positioning pins, stud pins, ejector rods, bases, and jacking screws. The Y-shaped supports are Y-shaped, and there are multiple symmetrical There are pin holes at the lower end of the Y-shaped support, and the upper end of the ejector rod is U-shaped, with pin holes on both sides. The Y-shaped support is fixed with the ejector rod through the stud pin and can rotate around the stud pin. , the ejector rod is fixedly connected with the base.

Description

A multi-degree-of-freedom auxiliary support for CNC milling machine machining

technical field

The invention relates to a multi-degree-of-freedom auxiliary support for mechanical processing of a numerical control milling machine.

Background technique

When processing cone parts on a milling machine, one end is often clamped with four claws of the universal steering table indexing head, and the other end is clamped with the top of the tailstock. The middle part of the longer part should also be equipped with auxiliary devices such as jacks. support. For conical parts that require vertical surface processing, due to the angled shape, it is inconvenient to use the tailstock center to tighten the other end. At this time, auxiliary support devices such as jacks can be used to support and fix the tail to prevent the large amount of cutting during processing, the long time of cutting, and the parts being subjected to cutting forces to cause cutting, deformation, vibration, etc. Ordinary jacks cannot push against the cone or point contact to cause damage to the cone. If you want to use an ordinary jack as an auxiliary support on a CNC milling machine or machining center, you can only reserve a platform on the curved surface, and finally remove the platform after the processing is completed, which increases the processing procedure and wastes time. The tool mark is generated, and at the same time, the loosening or displacement of the jack during the processing cannot be avoided. The jack used for general auxiliary support has a flat or V-shaped upper end of the ejector rod, which can only be in point or line contact. Four-axis simultaneous machining.

Contents of the invention

The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a multi-degree-of-freedom auxiliary support for CNC milling machine machining, to overcome the shortcomings of the existing jack for auxiliary support of machine tools, and to realize that the support angle can be freely adjusted by 180°, The locking device can be used as an auxiliary support device for rotating parts such as cylinders and cones with different diameters and tapers. The contact surface fits well and has high rigidity. It is suitable for long-term cutting movements and can improve the processing rigidity of the parts.

The technical solution of the present invention is: a multi-degree-of-freedom auxiliary support for CNC milling machine machining, including a Y-shaped support, cylindrical rollers, positioning pins, stud pins, ejector rods, bases, and jacking screws, wherein:

The Y-shaped support is Y-shaped, with n symmetrical holes evenly distributed on both sides. It is assembled with positioning pins and cylindrical rollers. There are pin holes at the lower end of the Y-shaped support. The upper end of the ejector rod is U-shaped. The column pin is fixed with the ejector pin and can rotate around the stud pin, and the ejector pin is connected with the base with clearance fit.

The cylindrical roller is cylindrical with a through hole in the center, and the material is brass. The cylindrical shape of the cylindrical roller is in line contact with the surface of the cylinder or cone without damaging the surface of the part. connect.

It also includes a top wire, and a top wire hole is opened on the side of the base, and the top wire is installed to prevent the ejector rod from rotating.

The bottom surface of the base is provided with drag-reducing grooves, the side of the bottom plate of the base is provided with fixing grooves for connecting with the machine tool, and the sides are provided with ribs to improve the rigidity of the base.

It also includes lock nuts and brass adjusting nuts, both of which are circular, with textured knurling on the outer circle, and a trapezoidal thread in the inner hole that matches the ejector rod. The brass adjusting nut can Adjust the ejection height of the ejector rod, and the lock nut can lock the brass adjusting nut and the ejector rod.

A multi-degree-of-freedom auxiliary support method for CNC milling machine machining, comprising the following steps:

(1) Bring the mobile base close to the support position, select the pin hole position of the cylindrical roller according to the diameter of the support position, install the cylindrical roller and positioning pin, and adjust the relative angle between the Y-shaped support and the part to be processed;

(2) Turn the brass adjusting nut to adjust the ejection height of the ejector rod, so that the outer circle of the cylindrical roller fits the surface of the part to be processed, tighten the stud pin and the nut to fix the angle of the Y-shaped support relative to the part to be processed, and tighten the lock nut at the same time Fix the ejection height of the ejector rod, and fix the base and the machine table.

The advantage of the present invention compared with prior art is:

(1) The present invention adopts a Y-shaped support, and the Y-shaped support can adjust the angle, so that the cylindrical roller is in vertical contact with the cylindrical or conical surface, which conforms to the principle of mechanics, has the effect of dispersing the cutting force, and improves the processing strength and rigidity;

(2) The present invention can support cylindrical surfaces and conical surfaces of different diameters and tapers by adjusting the upper and lower positions of the cylindrical rollers evenly distributed on both sides on the Y-shaped support;

(3) In the present invention, cylindrical rollers are used in the contact part with the parts to be processed, which can rotate around the positioning pins, can roll and support the parts, and support the four-axis linkage of the CNC machine tool;

(4) The present invention can adjust the support height and lock it through the push rod, the adjusting nut and the locking nut, and can support cylindrical surfaces and conical surfaces with different center heights and different diameters;

(5) There is a through keyway on the ejector rod of the present invention to cooperate with the top screw on the base, and when the vertical displacement of the ejector rod is adjusted through the brass adjusting nut, the ejector rod is prevented from rotating;

(6) There are grooves on the bottom surface where the base of the present invention is connected to the machine tool, which reduces frictional resistance and facilitates movement and position adjustment on the machine tool;

(7) The side of the bottom plate of the base of the present invention is provided with a fixing groove, which can be connected and fixed with the machine tool through the fixing groove. Reduce vibration during parts processing, improve rigidity, and prevent loosening and displacement.

Description of drawings

Figure 1 is a front view of the jack assembly;

Figure 2 is a left view of the jack assembly;

Fig. 3 is a front view and a left view of the V-shaped support;

Figure 4 is a front view and a top view of the ejector pin;

Fig. 5 is three views of the base;

Figure 6 is a schematic diagram of different gears;

Among them: 1 is the Y-shaped support, 2 is the cylindrical roller, 3 is the positioning pin, 4 is the stud pin, 5 is the ejector rod, 6 is the lock nut, 7 is the brass adjustment nut, 8 is the base, 9 is the top Silk.

Detailed ways

The present invention overcomes the deficiencies of the prior art and provides a multi-degree-of-freedom auxiliary support for CNC milling machine machining. Auxiliary support equipment for rotating parts such as cylinders and cones with different diameters and tapers. The contact surface fits well, and the rigidity is high. It is suitable for long-term cutting movements and can improve the processing rigidity of the parts.

As shown in Figure 1, it is the front view of the jack assembly, and as shown in Figure 2, it is the left view of the jack assembly. Nut 6, brass adjusting nut 7, base 8, top screw 9, wherein:

Figure 3 (a), (b) shows the front view and left view of the Y-shaped support; the Y-shaped support 1 is Y-shaped, with 6 holes on the upper end, evenly distributed on both sides, for assembling the positioning pin 3 and the cylindrical roller 2. The positioning pin 3 passes through holes of different heights to support cones and cylinders of different diameters. When the diameter of the support part of the cone or cylinder is large, the upper two holes can be used. When the diameter of the support part of the cone or cylinder is large There is a pin hole at the lower end of the Y-shaped support 1, which is used to connect and fix the stud pin 4 with the push rod 5. The Y-shaped support 1 can rotate around the stud pin 4, which is convenient for adjustment to make the cylindrical roller 2 It fits with the surface of the part to be processed. After adjusting the angle, you can tighten the stud pin 4 to fix it. The cylindrical roller 2 is cylindrical with a hole in the center. The material is brass with low hardness and high wear resistance. The shape of the cylinder can be in good line contact with the surface of the cylinder or cone without damaging the surface of the part. Its central hole is used to install the positioning pin 3 to connect with the Y-shaped support, and can rotate with the rotation of the part to be processed.

Figure 4(a) and (b) show the front view and top view of the ejector rod, the upper end of the ejector rod 5 is U-shaped, and there are pin holes on both sides, which are used to connect and fix the Y-shaped support 1 through the stud pin 4, and the lower end It is a trapezoidal thread, the strength of the trapezoidal thread is high, and it can withstand high supporting force. Push rod 5 rotates.

Figure 5 shows the three views of the base. The base 8 has a large bottom surface, stable support, and a drag-reducing groove on the bottom surface, which reduces the contact area between the bottom surface and the machine tool, reduces frictional resistance, and facilitates adjustment on the machine tool. Position, base 8 side has groove, is convenient to be connected with machine tool by screw rod. At the same time, due to its large area, it can also be pressed onto the machine tool through the pressure plate. The inner diameter of the base 8 is matched with the large diameter of the trapezoidal thread of the ejector rod 5 to prevent the ejector rod 5 from shaking after being ejected. There is a top thread hole on the side for installing the top thread. 9 prevent the push rod 5 from rotating, and there are ribs on the side of the base 8 that can improve the rigidity of the base 8.

The locking nut 6 and the brass adjusting nut 7 are circular, and there are textured knurlings on the outer circle that are convenient for hand-tightening, and the inner holes are trapezoidal threads that cooperate with the push rod 5 . Turning the brass adjustment nut 7 can adjust the ejection height of the ejector rod 5 . Tighten lock nut 6 and can lock brass adjusting nut 7 and push rod 5, vibration makes it loose during preventing parts processing.

As shown in Figure 6, it is a schematic diagram of different gear positions; there is a Y-shaped support 1 on the ejector rod 5, and the support 1 can be freely adjusted and locked at 180° around the stud pin 4 on the ejector rod 5, so as to be compatible with any angle of the cone Parts fit. Two cylindrical rollers 2 are installed on the Y-shaped support 1. The cylindrical rollers 2 can be in good contact with the cylinder or cone. The cylindrical rollers 2 can be adjusted up and down through the positioning pin 3 and the pin hole on the Y-shaped support 1. Gears to accommodate cylinders or cones of different diameters. There is a keyway between the push rod and the base to cooperate with the jackscrew 9 to prevent the push rod 5 from rotating. There is a brass adjusting nut 7 between the ejector rod 5 and the base 8, and the brass adjusting nut 7 and the ejector rod 5 are threaded. Rotating the brass adjusting nut 7 can adjust the ejection height of the ejector rod 5. Lock nut 6 is arranged above brass adjustment nut 7, after height is adjusted, tighten lock nut 6, height promptly fixes. Have the groove that can insert screw rod on the base 8, can be connected and fixed with machine tool by T-slot nut. On the bottom surface of the base connected with the machine tool, there is a groove, which reduces the friction between the bottom surface and the machine tool, and facilitates movement on the machine tool during position adjustment.

The following example illustrates the specific operation method:

First determine the supporting position of the part, and move the base 8 close to the supporting position. Select the appropriate pin hole position on the cylindrical roller 2 according to the diameter of the part support position, install the cylindrical roller 2 and the positioning pin 3, adjust the relative angle between the Y-shaped support 1 and the part to be processed, and turn the brass adjustment nut 7 to adjust the ejector rod 5 Ejection height, so that the outer circle of the cylindrical roller 2 fits the surface of the part to be processed, tighten the stud pin 4 and the nut to fix the angle of the Y-shaped support 1 relative to the part to be processed, and tighten the lock nut 6 to fix the top of the ejector rod 5 out of height to prevent loosening. Fix the base 8 and the machine tool workbench with a screw through the connecting groove on the base plate or with a pressing plate. That is, you can start processing the parts to be processed.

The content that is not described in detail in the description of the present invention belongs to the well-known technology of those skilled in the art.

Claims (6)

1. a kind of CNC milling machine is machined multiple degrees of freedom Auxiliary support, it is characterised in that including Y-shaped support (1), cylinder rolling Take turns (2), positioning pin (3), stud pin (4), mandril (5), pedestal (8), jackscrew (9), in which:

Y-shaped supports (1) Y-shaped, and both sides are evenly distributed with n symmetrical holes, assembles positioning pin (3), cylindrical roller (2), Y word There is pin hole in shape support (1) lower end, and mandril (5) upper end is u-shaped, and there are a pin hole in two sides, Y-shaped support (1) by stud pin (4) with Mandril (5) is fixed, and can rotate around stud pin (4), and mandril (5) is connect with pedestal (8) clearance fit.

2. a kind of CNC milling machine according to claim 1 is machined multiple degrees of freedom Auxiliary support, it is characterised in that: described Cylindrical roller (2) centered on have the cylinder of through-hole, material selection brass, the cylindrical shape and cylinder of cylindrical roller (2) or Conical surface does not destroy piece surface in line contact, and central through hole is packed into positioning pin (3) and connect afterwards with Y-shaped support (1).

3. a kind of CNC milling machine according to claim 1 or 2 is machined multiple degrees of freedom Auxiliary support, it is characterised in that: It further include jackscrew (9), pedestal (8) side is provided with top wire hole, and installation jackscrew (9) prevents mandril (5) from rotating.

4. a kind of CNC milling machine according to claim 1 or 2 is machined multiple degrees of freedom Auxiliary support, it is characterised in that: Described pedestal (8) bottom surface is provided with drag reduction slot, and pedestal (8) bottom panel side has fixing groove for connecting with lathe, and side is improved The muscle of the rigidity of pedestal (8).

5. a kind of CNC milling machine according to claim 1 or 2 is machined multiple degrees of freedom Auxiliary support, it is characterised in that: It further include locking nut (6), brass adjusting nut (7), locking nut (6), brass adjusting nut (7) are circle, in outer circle Equipped with hatching knurling, inner hole is the trapezoidal thread cooperated with mandril (5), brass adjusting nut (7) adjustable mandril (5) ejection Highly, locking nut (6) can lock brass adjusting nut (7), mandril (5).

6. a kind of CNC milling machine is machined multiple degrees of freedom Auxiliary support method, it is characterised in that include the following steps:

(1) mobile foundation (8) are selected into the pin hole position of cylindrical roller (2), dress according to Support Position diameter close to Support Position Enter cylindrical roller (2), positioning pin (3), adjusts the relative angle of Y-shaped support (1) and parts to be processed；

(2) rotation brass adjusting nut (7) adjusts mandril (5) ejection height, makes cylindrical roller (2) outer circle and parts to be processed table Face paste is closed, and tightens the angle of stud pin (4) and the fixed Y-shaped support (1) of nut with respect to parts to be processed, while tightening locking screw The ejection height of female (6) fixed mandril (5), pedestal (8) is fixed with platen.