CN103464998A - Machining process of slotting tool - Google Patents

Abstract

The invention discloses a machining process of a slotting tool. The machining process comprises a blade grinding procedure, and is characterized in that the machining process of the blade grinding procedure comprises the following steps: (1) establishing a geometrical model of the slotting tool, and calculating the compound angle of a slotting tool blade according to the front angle and profile included angle of the slotting tool blade; and (2) grinding a profile according to the compound angle of the slotting tool blade, and leaving a margin of 0.2 millimeter. According to the machining process of the slotting tool disclosed by the invention, the profile included angle of the slotting tool is prevented from being damaged by severe friction with a workpiece in a returning process, profiles are manufactured accurately, and profile holes meet certain requirements; the process can be popularized to the machining process of slotting tools of different profile holes.

Description

A kind of processing technology of slotting tool

Technical field

The invention belongs to field of machining, be specifically related to a kind of processing technology of slotting tool.

Background technology

Plunge tooling is to utilize the relative workpiece of in the vertical direction to make repeatedly the machining in rectilinear motion processing groove and type hole.The working method of slotting is similar with planing, but the slotting tool clamping is on the knife bar of slotting machine ram bottom, and the Kong Zhongzuo that can stretch into workpiece vertically moves back and forth, and is downwards impulse stroke, is upwards backhaul.The workpiece be arranged on the slotting machine workbench is done feed motion intermittently after the each backhaul of slotting tool, difficulty of processing for slotting tool is larger, but, in actual production, some type holes that often need can only be processed by slotting machine, be applicable to single-piece or small serial production processing, inner hole key slot or splined hole, also can process square hole and polygonal hole.For the inner hole key slot of blind hole or shoulder, slotting is almost unique method, and therefore, the processing technology of research slotting tool is very necessary and urgent.

The blade angle of slotting tool consists of jointly anterior angle, relief angle and profile angle, form compound angle, if the blade anterior angle of slotting tool is greater than 3 °, adopt and processed perpendicular to front angle plane in sharpening technique, can cause the processing of profile angle defective, cause changing with the type hole of this plunge tooling.

Summary of the invention

The processing technology that the purpose of this invention is to provide a kind of slotting tool, when this technique has solved slotting tool blade anterior angle and is greater than 5 °, relief angle is processed underproof problem.

For achieving the above object, the technical solution used in the present invention is:

A kind of processing technology of slotting tool, comprise the sharpening operation, it is characterized in that: the processing technology of described sharpening operation is as follows:

1) set up the geometrical model of slotting tool, according to slotting tool blade anterior angle and profile angle, calculate slotting tool blade compound angle;

2) according to slotting tool blade compound angle grinding profile, stay the 0.2mm surplus.

The processing technology of above-mentioned a kind of slotting tool is characterized in that: the computational methods of described compound angle are: establishing anterior angle is α, and relief angle is β, and compound angle is γ, γ=2arg[tg(β/2) * tg α/sin α].

The processing technology of above-mentioned a kind of slotting tool, concrete technique is as follows:

1), material: forging blanking;

2), plane: stay mill 0.4 ~ 0.5mm by figure plane four sides, keeping parallelism is vertical;

3), milling: planar end surface is to total length;

4), pincers: by figure, draw head configuration line and neck trim line;

5), turning: press figure and line centering car neck to size, not headstock section;

6), milling: by figure and line milling head profile, tread stays 0.5 ~ 0.6mm, mills front-and-back angle and keeps the cutter head overhang to add 1mm;

7), pincers: deburring, afterbody chamfering and file are repaiied head configuration;

8), heat treatment: the tempering of quenching, sword HRC63 ~ 66, handle HRC33 ~ 48;

9), blow: blast;

10), plain grinding: sharpening bar four sides is to size;

11), sharpening: according to slotting tool blade compound angle grinding profile, stay the 0.2mm surplus;

12), optics grinding machine: the mill profile, to size, is ground relief angle.

Beneficial effect of the present invention: plunge tooling technique of the present invention has avoided slotting tool profile angle and workpiece in backhaul violent friction occurs and damage, and the profile manufacture is accurate, and the type hole of inserting out reaches requirement, and this technique can be generalized to the plunge tooling technique in different shaped hole.

The accompanying drawing explanation

Fig. 1 is the front view of six side's slotting tools.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the structural representation of the geometrical model of foundation.

The specific embodiment

As depicted in figs. 1 and 2, the profile angle that provides of design be 66 ° 22 ' (being 66.37 °), the plane that this profile angle is perpendicular to the center cutter line provides, but in reality processing, due to the existence of 5 ° of anterior angles, when the mill profile, grinding is carried out on the plane that is perpendicular to 5 ° of anterior angles, so 66 ° 22 of profile angle ' (being 66.37 °) will change, it is generally acknowledged if anterior angle to be less than 3 ° of impacts of the grindings on profile little, can not revised.

Six side's slotting tools as depicted in figs. 1 and 2, processing technology is as follows:

1), material: forging blanking;

2), plane: stay mill 0.4 ~ 0.5mm by figure plane four sides, keeping parallelism is vertical;

3), milling: planar end surface is to total length;

4), pincers: by figure, draw head configuration line and neck trim line;

5), turning: press figure and line centering car neck to size, not headstock section;

6), milling: by figure and line milling head profile, tread stays 0.5 ~ 0.6mm, mills front-and-back angle and keeps the cutter head overhang to add 1mm;

7), pincers: deburring, afterbody chamfering and file are repaiied head configuration;

8), heat treatment: the tempering of quenching, sword HRC63 ~ 66, handle HRC33 ~ 48;

9), blow: blast;

10), plain grinding: sharpening bar four sides is to size;

11), sharpening grinding: according to slotting tool blade compound angle grinding profile, stay the 0.2mm surplus.

The technique of described sharpening operation is as follows:

It is that beta, gamma is compound angle that work in-process is established the profile angle, and α is anterior angle, two profiles are respectively plane A and plane B, establish the intersection of plane A and plane B, and front linea angulata is MN, work is perpendicular to the plane C of MN, the intersection gained angle of Calculation Plane C and plane A and plane B is γ, sets up geometrical model, as shown in Figure 3, if AB=a, BD=1, OB=c, BE=b; :

a=1/?tg（β/2）

Tg(γ/2)=1/c, sin α=c/b draws c=sin α/[tg(β/2) tg α]

Tg γ=a/b, draw b=1/ [tg(β/2) * tg α]

γ=2arg[tg（β/2）×tgα/sinα]

In the present embodiment, α is 5 °, and β is 66.37 °, through calculating compound angle γ, is 66.53 °, when the mill profile, need to carry out profile grinding by 66.53 °.

12), optics grinding: the mill profile, to size, is ground relief angle.

Claims (3)

1. the processing technology of a slotting tool, comprise the sharpening operation, it is characterized in that: described sharpening operation processing technology is as follows:

1) set up the geometrical model of slotting tool, according to slotting tool blade anterior angle and profile angle, calculate slotting tool blade compound angle;

2) according to slotting tool blade compound angle grinding profile, stay the 0.2mm surplus.

2. the processing technology of a kind of slotting tool as claimed in claim 1, it is characterized in that: the computational methods of described compound angle are: establishing anterior angle is α, and the profile angle is β, and compound angle is γ, γ=2arg[tg(β/2) * tg α/sin α].

3. the processing technology of a kind of slotting tool as claimed in claim 1 or 2, it is characterized in that: concrete technique is as follows:

1), material: forging blanking;

2), plane: stay mill 0.4 ~ 0.5mm by figure plane four sides, keeping parallelism is vertical;

3), milling: planar end surface is to total length;

4), pincers: by figure, draw head configuration line and neck trim line;

5), turning: press figure and line centering car neck to size, not headstock section;

6), milling: by figure and line milling head profile, tread stays 0.5 ~ 0.6mm, mills front-and-back angle and keeps the cutter head overhang to add 1mm;

7), pincers: deburring, afterbody chamfering and file are repaiied head configuration;

8), heat treatment: the tempering of quenching, sword HRC63 ~ 66, handle HRC33 ~ 48;

9), blow: blast;

10), plain grinding: sharpening bar four sides is to size;

11), sharpening: according to slotting tool blade compound angle grinding profile, stay the 0.2mm surplus;

12), optics grinding: the mill profile, to size, is ground relief angle.

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