CN101844256B

CN101844256B - Method for processing threaded decorative surfaces of digital exterior products

Info

Publication number: CN101844256B
Application number: CN2010101402780A
Authority: CN
Inventors: 高田敬一
Original assignee: Shanghai Nanbu Plastic Products Co ltd
Current assignee: Shanghai Nanbu Plastic Products Co ltd
Priority date: 2010-04-07
Filing date: 2010-04-07
Publication date: 2012-06-27
Anticipated expiration: 2030-04-07
Also published as: CN101844256A

Abstract

The invention relates to a method for processing threaded decorative surfaces, in particular to a method for processing a ring threaded decorative surface of a digital exterior product. The ring threaded decorative surface transits to a ring threaded surface from a smooth ring surface from the inside out; the ring threaded surface possesses continuous triangular tread loops; before processing, a cutter is fixed on a CNC machining center workbench, and a workpiece is clamped on a spindle; when in process, the workpiece is rotated in a high speed along with the spindle to be processed from inside out; the nose of the cutter is vertical to the smooth ring surface; when lathe work is in place, the photometric brightness and evenness of the smooth ring surface are increased; and after entering into the ring threaded surface, the cutter performs repeated feed continuous cutting with small cutting output along the continuous triangular thread cross section tracks to finish the ring threaded surface process. The product processed by the processing method of the invention has beautiful appearance surface, and is brighter and smoother.

Description

The processing method of threaded decorative surfaces of digital exterior products

Technical field

The present invention relates to a kind of processing method of screw thread decorative cover, specifically refer to a kind of processing method of threaded decorative surfaces of digital exterior products.

Background technology

Often there is ring screw thread decorative cover on digital series products surface, such as the digital camera lens ring, because it is the appearance component on the digital camera, but also needs back processing electroplating processes, so very high to the requirement of mould.Especially the spiral lines of product surface requires continuously, and is neat; Gloss is dazzle the eyes, and the texture of metal is arranged, and this just has high requirements to processing precision of products; The machining accuracy of engine lathe can't reach requirement of products, at home the mold insert that machines from external import basically of this series products.And the basic CNC lathe that uses is processed in the current techniques, but the ring screw thread decorative cover that processes still waits to improve, especially on the presentation qualities such as continuity of threaded line.

Summary of the invention

The objective of the invention is weak point according to above-mentioned prior art; A kind of processing method of threaded decorative surfaces of digital exterior products is provided, has overturned the processing technology of molding cutter screw cutting commonly used, utilize the processing mode of machining center simulation CNC lathe; The feed of non-once property; But adopt repeatedly feed mode of little cutting output, along continuous triangle thread cross section track cutting, the product surface that processes is more bright, smooth.

The object of the invention is realized being accomplished by following technical scheme:

A kind of processing method of threaded decorative surfaces of digital exterior products, this ring screw thread decorative cover carries out the transition to the ring flank by smooth anchor ring from the inside to the outside, and said ring flank has continuous triangle thread loop; Before the processing, cutter is fixed on workbench, clamping workpiece is on main shaft; Add man-hour, workpiece rotates at a high speed with main shaft, from inside to outside processing; The cutter point of a knife is vertical angle with said smooth anchor ring earlier, and turning processing puts in place, increases smooth anchor ring brightness and flatness; After getting into the ring flank; Cutter along the continuous little cutting output of triangle thread cross section track repeatedly feed cut continuously, accomplish the processing of ring flank, the cutting output that described little cutting output refers to the single feed is half the less than the triangle thread degree of depth.

Above-mentioned repeatedly feed refers at least three feeds.

When turning processing ring flank, the angle of wedge of cutter is less than the threaded line angle of said triangle thread; In the inner ring of ring flank and the man-hour that adds of outmost turns, no longer along the cutting of continuous triangle shape thread segment track, but a feed cuts into the plane, to avoid the burr generation; Above-mentioned cutter is the alloy knife of hard rock of being inlaid with gold.

Advantage of the present invention is; Processing method of the present invention utilizes the processing mode of machining center simulation CNC lathe to succeed; Overturn the processing technology of molding cutter screw cutting commonly used, practiced thrift production cost, increased the service life of product mold insert; The product surface outward appearance that processes is beautiful, and is more bright, smooth.

Description of drawings

Fig. 1 has the mold insert profile sketch map of ring screw thread decorative cover for surface in the present embodiment;

Fig. 2 is the cross-sectional view of ring screw thread decorative cover;

Fig. 3 processes sketch map for the inner ring of ring screw thread decorative cover with outmost turns.

The specific embodiment

Through embodiment characteristic of the present invention and other correlated characteristic are done further explain below in conjunction with accompanying drawing, so that technical staff's of the same trade understanding:

Label 1-5 representative is mold insert 1, ring flank 2, smooth anchor ring 3, acute angle burr 4, cutting plane 5 among the accompanying drawing 1-3.

The present embodiment objective for implementation is the mould of a digital camera lens ring; Accompanying drawing 1 is surperficial profile sketch map with aluminium matter mold insert mould of ring screw thread decorative cover in the present embodiment; This product is owing to be the appearance component on the digital camera; The surface has ring screw thread decorative cover, also needs back processing electroplating processes, so very high to the requirement of mould.Especially the spiral lines of product surface requires continuously, and neat, gloss is dazzle the eyes, and the texture of metal is arranged.

Accompanying drawing 2 is the cross-sectional view of ring screw thread decorative cover; It is aluminium matter mold insert partial cross section cutaway view among Fig. 1; As shown in Figure 1; Aluminium matter mold insert 1 surface is ring screw thread decorative cover, and this ring screw thread decorative cover carries out the transition to ring flank 2 by smooth anchor ring 3 from the inside to the outside, and smooth anchor ring 3 surfaces have the high smooth characteristic of high accuracy.As shown in Figure 2, ring screw thread decorative cover inner ring height is higher than the outer ring, smooth anchor ring 3 downward-sloping about 3 degree, carry out the transition to ring flank 2 after, ring flank 2 has the inclination of about 6 degree downwards again, transition face and inside and outside circle all have knuckle.Shown in ring flank partial enlarged drawing among Fig. 2, flank has continuous triangle thread loop, and the threaded line angle of triangle thread is a.

To this ring screw thread decorative cover; The machining accuracy of engine lathe can't reach requirement of products; External prior art way is to use the CNC lathe to process, but the ring screw thread decorative cover that processes still waits to improve, especially on the appearance properties such as continuity of threaded line.For guaranteeing the outward appearance of product, the mold insert of this mould all imports again after machining ring screw thread decorative cover abroad usually because the material of relevant import mold insert is an aluminium, material is softer, thus spoilage aborning than higher, the subsequent machining cost height.

In the present embodiment, processing method of the present invention attempts processing with the processing mode of high speed CNC machining center Analog lathe.Having made anchor clamps especially, be workpiece that the aluminum mold insert is installed on the main shaft, and cutter is fixed on the work top.Add Work piece high-speed rotation in man-hour, cutter is slowly walked along the cross sectional shape of threaded line.

At first on the mold insert material; Because the material of aluminium is softer; So processing is relatively easy, but damage than being easier in the process of producing, and common mold materials hardness is high; Processing difficulties and be difficult to reach the glossiness of product requirement again need comprehensively can reach proper effect aspect life-span and the outward appearance two.Attempted multiple material, like NAK55, beryllium copper; S136H, the alloy aluminum of the various trades mark is like the alloy aluminum of Japanese copper-nickel alloy; The alloy aluminum in the sliding river of Japan etc., though S136H slightly differs from appearance and raises, its hardness is up to HRC41; Life-span to workpiece has greatly improved, and the effect after the aluminum profile extrusion of Japanese copper-nickel alloy is near requirement of client, thereby selects resultant effect alloy aluminum material mold insert preferably on the section bar for use.

Secondly on stage property is selected, uses common white steel knife, process cut out the shape of screw thread through the line cutting after, because the material of white steel knife is softer, processing a bit of time rear knife edge will burst apart, and causes the outward appearance ten minutes of workpiece crude.Through test of many times, finally selected the alloy knife of the enough edge diamonds of hardness.

Adding man-hour at last, cutter is fixed on CNC machining center workbench, clamping workpiece adds man-hour on main shaft, and workpiece rotates at a high speed with main shaft, the rotating speed of adjustment workpiece, the cutting output of cutter etc., processing from inside to outside, the smooth anchor ring 3 of processing earlier.Smooth anchor ring 3 requires extremely light, but its processing preorder operation is that high speed CNC mills processing, because angle is very little, processing effect is not ideal enough, needs polishing once more, causes several light and out-of-flatnesses inadequately like this.In the present embodiment, the cutter point of a knife put with smooth anchor ring 3 be vertical angle, be fixed on the CNC work top, put in place, can effectively increase smooth anchor ring 3 brightness and flatness, reached appearance requirement with the form one-time turning processing of car.

Processing from inside to outside gets into ring flank 2.For triangle thread processing, generally be that disposable feed processing puts in place in the common process, but like this because cutting-tool angle is big, cutting output is big; The triangle thread both sides receive repeatedly reciprocating extrusion; Easy deformation, even produce burr, avalanche, do not reach machining accuracy and appearance requirement degree fully.In the present embodiment, adopt make cutter along the continuous little cutting output of triangle thread cross section 2 tracks repeatedly feed cut continuously, accomplish the processing of ring flank.As shown in Figure 2; Cutter advances along the continuous triangle shape threaded line track shown in arrow processing, little cutting output, repeatedly, slowly feed, the threaded side wall power that is squeezed is little like this; Be out of shape for a short time, the ring flank after retrofit is accomplished can reach precision and the requirement of outward appearance degree.Wherein, the cutting output that little cutting output refers to the single feed is half the less than the triangle thread degree of depth, and at least three feeds are advisable.When processing ring flank, should notice that the angle of wedge of cutter is less than the threaded line angle of triangle thread, promptly the threaded line angle among Fig. 2 is a, puts in place otherwise threaded line is difficult to processing.

The inner ring that is illustrated in figure 3 as ring screw thread decorative cover is processed sketch map with outmost turns.Because screw thread lines peak and peak-to-peak distance are quite tiny, therefore the inner ring in threaded line has the thin iron of a circle with outmost turns, and the external diameter and the internal diameter of product will be easy to produce burr, acute angle burr 4 as shown in Figure 3 when production like this.For this reason; We change the shape of double thread line, have all increased a bit of facing directly at inner ring and outmost turns, and processing should no longer be cut along continuous triangle shape thread segment track during the place; But a feed cuts into the plane; Be cutting plane 5 shown in Figure 3, so both avoided the generation of burr, also make the edge brighter.

The mold insert that processes according to the inventive method is compared with the like product mold insert of prior art processing, and cost is low, and the product surface outward appearance is very beautiful, light and smooth, threaded line in appearance in addition even better.

Claims

1. the processing method of a threaded decorative surfaces of digital exterior products, said surfaces of digital exterior products is the aluminum mold insert mould of digital camera lens ring, this screw thread decorative cover carries out the transition to the ring flank by smooth anchor ring from the inside to the outside; Said ring flank has continuous triangle thread loop, before it is characterized in that processing, cutter is fixed on workbench; Clamping workpiece adds man-hour on main shaft, workpiece rotates at a high speed with main shaft; Processing from inside to outside, cutter point of a knife and said smooth anchor ring are vertical angle, and turning processing puts in place; Increase smooth anchor ring brightness and flatness, get into the ring flank after, cutter along the continuous little cutting output of triangle thread cross section track repeatedly feed cut continuously; Accomplish the processing of ring flank, the cutting output that described little cutting output refers to the single feed is half the less than the triangle thread degree of depth.

2. the processing method of a kind of threaded decorative surfaces of digital exterior products as claimed in claim 1 is characterized in that described repeatedly feed refers at least three feeds.

3. the processing method of a kind of threaded decorative surfaces of digital exterior products as claimed in claim 1 is characterized in that the angle of wedge of cutter is less than the threaded line angle of said triangle thread when turning processing ring flank.

4. the processing method of a kind of threaded decorative surfaces of digital exterior products as claimed in claim 1; It is characterized in that the man-hour that adds in the inner ring of said ring flank and outmost turns; No longer cut along continuous triangle shape thread segment track; But a feed cuts into the plane, produces to avoid burr.

5. the processing method of a kind of threaded decorative surfaces of digital exterior products as claimed in claim 1 is characterized in that said cutter is the alloy knife of hard rock of being inlaid with gold.