CN104400372A - Arc rear angle forming blade machining method - Google Patents

Abstract

The invention relates to the field of machining tool manufacturing, in particular to a machining method for arc relief angle forming blades. The processing method of the circular-arc relief angle forming blade includes the following steps: (1) processing the blade into a ring cylinder whose outer peripheral surface is three circular arcs connected along its radial direction; (2) heat treatment: making the blade reach a set hardness; (3) Polish the surface of the curved surface. Polishing only changes the roughness of the blade, but does not change the shape and size of the blade; (4) Wire cutting: process three chip pockets with fronts; (5) Grind the front. Because the arc relief angle forming blade processing method of the present invention cancels the grinding behind the arc curve (troublesome operation, high cost), increases polishing (the surface of the part is a ring cylinder connected by three arcs, so the polishing operation It is very easy); the wire cutting operation is also relatively easy, so the manufacturing process of the blade is greatly simplified, the processing cost is reduced, and the processing efficiency of the blade is improved.

Description

The processing method of arc relief angle forming insert

technical field

The invention relates to the field of machining tool manufacturing, in particular to a machining method for arc relief angle forming blades.

Background technique

In the process of machining, it is often encountered that the arc relief angle forming blade is used to process parts. For example, the key part of the high-voltage circuit breaker, the tie rod (as shown in Figure 1), is a part that needs to be processed by the arc relief angle forming blade. , its thread tooth profile is R circular arc shape, and the tolerance precision of the thread outer diameter and bottom diameter is very high, so it is necessary to use an insert with an arc relief angle forming process, that is, an arc relief angle forming insert, as shown in Figure 2 As shown, the arc relief forming blade includes a front surface 101 and a rear surface 102, wherein the front surface 101 is a plane, and the rear surface 102 is composed of three circular arc surfaces connected radially along the blade.

Since the back of the arc relief forming insert is a circular arc surface, the function of the insert relief is to reduce the contact area between the back of the tool and the machined part (thus reducing the cutting force), and the roughness of the back of the insert directly affects the surface of the machined part Therefore, the tool is required to have an accurate contour size and good roughness. In addition, because the hardness of the blade is very high, the existing processing method is to use a curved grinding machine or a CNC grinding machine. The processing method is shown in Figure 3: (1) process the blade into three ring cylinders connected by arcs and then process three chip pockets with the front; (2) heat treatment: quenching (to make the tool (3) Grinding the back and front of the arc (reaching a certain roughness; grinding with a curve grinder or with a CNC grinder).

Since the above-mentioned processing method uses the grinding process of the curve grinding machine or the grinding process of the numerical control grinding machine, there are problems of complicated process and high production cost.

Contents of the invention

The object of the present invention is to provide a method for processing an arc relief angle forming blade, so as to simplify the processing technology of the arc relief angle forming blade and reduce the manufacturing cost of the arc relief angle forming blade.

In order to solve the above problems, the arc relief angle forming blade processing method of the present invention adopts the following technical scheme: the arc relief angle forming blade processing method includes the following steps: (1) processing the blade into three arcs along its outer peripheral surface Radially connected ring cylinders; (2) heat treatment: make the blade reach the set hardness; (3) polish the surface of the curved surface, polishing only changes the roughness of the blade, not the shape and size of the blade; (4) wire Cutting: Process three chip pockets with front; (5) Grind the front.

The heat treatment of the annular cylinder in step (2) refers to quenching treatment.

Because the arc relief angle forming blade processing method of the present invention cancels the grinding behind the arc curve (troublesome operation, high cost), increases polishing (the surface of the part is a ring cylinder connected by three arcs, so the polishing operation It is very easy); the wire cutting operation is also relatively easy, so the manufacturing process of the blade is greatly simplified, the processing cost is reduced, and the processing efficiency of the blade is improved.

Description of drawings

Fig. 1 is a structural schematic diagram of a tie rod in a high voltage circuit breaker;

Fig. 2 is the front view of the arc relief angle forming blade;

Fig. 3 is the top view of arc relief angle forming blade;

Fig. 4 is the schematic diagram of the existing processing method of arc relief forming blade;

Fig. 5 is a schematic diagram of the machining method for arc relief forming inserts of the present invention.

Detailed ways

The embodiment of the machining method of the arc relief angle forming blade, as shown in Figure 5, includes the following steps: (1) processing the blade into a ring cylinder whose outer peripheral surface is three circular arcs connected along its radial direction; (2 ) Heat treatment: make the blade reach the set hardness. In this step, the heat treatment of the annular cylinder refers to quenching treatment; (3) Polish the outer peripheral surface. Polishing only changes the roughness of the blade and does not change the shape and size of the blade ; (4) Wire cutting: process three chip pockets with the front; (5) Grinding the front.

Claims (2)

1. The method for processing an arc relief angle forming blade is characterized in that it comprises the following steps: (1) processing the blade into a ring cylinder whose outer peripheral surface is three circular arcs connected along its radial direction; (2) heat treatment: The blade reaches the set hardness; (3) Polish the surface of the curved surface, the polishing only changes the roughness of the blade, not the shape and size of the blade; (4) Wire cutting: process three chip pockets with the front; (5 ) grinding front. 2 . The method for machining an arc relief forming insert according to claim 1 , wherein the heat treatment of the annular cylinder in step (2) refers to quenching treatment. 3 .