CN201702428U - Leaf-shaped milling cutter - Google Patents

Abstract

The utility model relates to the technical field of milling cutters, in particular to a milling cutter used for processing plastic workpieces. Aiming at the defects of poor chip removal and easy sticking of common milling cutters in the prior art when directly processing plastic workpieces, a leaf-shaped milling cutter is provided, including a handle, a cutter bar and a cutter head connected to the front end of the cutter bar. The cutter head is composed of a plurality of evenly distributed leaf-shaped blades. The two sides of the leaf-shaped blades are concave and consistent arcs. The included tangent angle at the root of the leaf-shaped blade is 15° to 45°. The utility model can directly process various workpieces, especially plastic parts, can discharge chips smoothly, improves product quality, and improves work efficiency.

Description

leaf milling cutter

technical field

The utility model relates to the technical field of milling cutters, in particular to a milling cutter used for processing plastic workpieces.

Background technique

In the prior art, there are many milling cutters capable of processing metal workpiece chips. Typically, the utility model with the notification number CN201239818Y discloses a T-shaped milling cutter, including a handle and a cutter head. The main point is that the cutter The head has staggered teeth and teeth on both sides, the tooth angle on both sides is 1-2°, and the tooth angle on both sides is 10-12°. The utility model is light in cutting, the force on the parts is uniform, the vibration of the machine tool is significantly reduced, and the variation of the T-shaped groove in the horizontal direction can be controlled within 0.1mm. Using this tool for intermittent cutting has high efficiency and good surface quality of the parts. Less consumption. However, its cutter teeth are linear, and due to the characteristics of plastic, when this T-shaped milling cutter is used to make plastic workpieces, the chip removal of the milling cutter is not smooth, and it is easy to stick to the cutter, which affects the processing quality. Therefore need a kind of milling cutter, can carry out smooth processing to plastic workpiece, improve processing quality.

The purpose of this utility model is to overcome the defects of unsmooth chip removal and easy sticking of the cutter when ordinary milling cutters directly process plastic workpieces in the prior art, and provide a leaf-shaped milling cutter, which can process various workpieces, especially plastic workpieces. Direct processing can remove chips smoothly and ensure processing quality.

Contents of the invention

The utility model provides a leaf-shaped milling cutter aiming at the above-mentioned defects in the prior art that the common milling cutter directly processes plastic workpieces, the chip removal is not smooth and the cutter is easy to stick.

The utility model mainly solves the above-mentioned technical problems through the following technical solutions: a leaf-shaped milling cutter, including a handle, a cutter bar and a cutter head connected to the front end of the cutter bar, and the cutter head is composed of a plurality of evenly distributed leaf-shaped blades , the two sides of the leaf-shaped blade are concave and consistent arcs, the angle between the tangent lines of the two sides of the arc at the knife tip is 30°~60°, and the tangent angle of the two sides of the arc at the blade root of the leaf-shaped blade is 15°~45°, the cutter head is installed in the center of the tool holder and the tool holder to ensure the machining accuracy. When entering the cutting, the cutting force of the tip of the blade-shaped blade is strong, and when exiting the cutting, the blade-shaped blade can withdraw smoothly. The leaf-shaped blade is concave and has a large chip-holding space, and the cutting can be quickly and smoothly centrifugally thrown out.

As a preferred solution of the above solution, it is characterized in that the connection between the leaf-shaped blades is a circular arc transition, which can reduce stress concentration, improve local stress, and thus increase the service life of the milling cutter. the

As a preferred solution of the above solution, it is characterized in that the cutter head and the front end of the cutter rod are connected by threads, which can facilitate the replacement of damaged cutter heads and improve the economy.

As a preferred solution of the above solution, it is characterized in that the blade-shaped blades are two pieces, with a large space for chips, so that the cutting can be quickly and smoothly thrown out, and the processing can be carried out smoothly.

Therefore, the utility model can directly process various workpieces, especially plastic parts, can remove chips smoothly, improves product quality, and improves work efficiency.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is a schematic diagram of the utility model from the downward direction of the cutter head;

Fig. 3 is a kind of schematic diagram of the implementation process of the utility model.

Detailed ways

The technical scheme of the utility model is further specifically described below through the embodiments in conjunction with the accompanying drawings.

As shown in accompanying drawing 1 and accompanying drawing 2, a leaf-shaped milling cutter includes a handle 1, a cutter bar 2 and a cutter head 3 connected to the front end of the cutter bar. The leaf-shaped blade 31 is formed, the two sides of the leaf-shaped blade are concave to the same arc, the angle between the tangent line of the arc on both sides at the tip of the knife is 30°, and the tangent line of the arc on both sides at the root of the blade of the leaf-shaped blade The included angle is 30°. When entering the cutting, the cutting force of the tip of the blade-shaped blade is strong, and when exiting the cutting, the blade-shaped blade can withdraw smoothly. The cutter head is installed in the center of the tool handle and the tool rod to ensure the machining accuracy. The connection between the leaf-shaped blades is a circular arc transition, which can reduce stress concentration and improve local stress. The cutter head and the front end of the cutter bar are connected by threads, which can easily replace the damaged cutter head and improve the economy. There are two leaf-shaped blades with a large space for chips, which makes the cutting fast and smooth, and ensures the smooth progress of processing.

As shown in Figure 3, the leaf-shaped milling cutter is used to mill out a side groove 41 in the circumferential direction of the plastic workpiece 4, the workpiece is fixed on the rotary table, the milling cutter handle is loaded into the tool holder, and the position of the cutter is adjusted. Align the tip of the blade-shaped blade with the position to be processed on the workpiece, apply power, the blade-shaped blade eats into the workpiece and starts cutting, and the cutting blades are quickly and smoothly centrifugally thrown out from the arc-shaped passage between the blades to avoid sticking to the blade. Rotating, the leaf-shaped blade completes the circumferential cutting of the workpiece, and finally mills out the circumferential side groove.

In particular, when the utility model is applied to the workshop for making plastic molding samples, since ordinary milling cutters cannot directly process the side positions of the samples, the side grooves or aesthetic lines of many samples cannot be directly cut, and the samples need to be Disassemble the parts for processing, and then bond them into a whole by post-processing, which affects the appearance and overall strength of the sample. However, after using this leaf-shaped milling cutter, the implementation process is the same as the above-mentioned embodiment, and the side of the plastic molding sample can be processed. Bits are directly processed, which reduces the dismantling process of plastic molding samples, improves work efficiency and improves product quality.

The utility model can directly process various workpieces, especially plastic parts, can discharge chips smoothly, improves product quality, and improves work efficiency.

Claims (4)

1. leaf milling cutter, comprise handle of a knife (1), knife bar (2) and the cutter head (3) that is connected with the knife bar front end, it is characterized in that, described cutter head is made up of the equally distributed leaf blade of multi-disc (31), the both sides of leaf blade are recessed arc to unanimity, the tangent line angle of both sides arc at the point of a knife place is 30 ° ~ 60 °, and the tangent line angle of both sides arc at the cutter root place of leaf blade is 15 ° ~ 45 °.

2. a kind of leaf milling cutter as claimed in claim 1 is characterized in that the junction between the described leaf blade is an arc transition.

3. a kind of leaf milling cutter as claimed in claim 1 is characterized in that, described cutter head and knife bar front end are by being threaded.

4. as claim 1 or 2 or 3 described a kind of leaf milling cutters, it is characterized in that described leaf blade is two.

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