CN201201067Y - A drill-reamer compound tool - Google Patents

Abstract

The utility model discloses a drill-reamer composite cutter, which comprises a cutter head, a cutter neck and a cutter handle. The speed section is welded as one, and the neck of the reamer and the neck of the front part of the handle are welded as one. The utility model has the following beneficial effects: 1. Two different types of cutting tools are compounded together, and the two dispersed processes are rationally concentrated, the number of processes is shortened, the process is simplified, the time for clamping and changing tools is saved, and the production efficiency is improved. 2. It is beneficial to ensure the coaxiality of the two hole machining, and it is easier to adjust the tool setting, so the machining accuracy can be significantly improved. 3. It not only saves a set of special machine tools and special fixtures, but also shortens the production line and simplifies equipment design, thus improving the reliability of automation control while saving equipment procurement costs.

Description

A drill-reamer compound tool

technical field

The utility model relates to a machining tool, specifically a compound tool combined with a drill bit and a reamer, and belongs to the technical field of tools.

Background technique

The threaded interface of the vehicle gas cylinder adopts a special conical pipe thread, which requires high processing accuracy. The machining process is divided into flat end face, turning outer circle, drilling bottom hole, reaming taper hole, chamfering, tapping, etc. The dispersion of the process makes the processing process too long when processing large workpieces (vehicle gas cylinders), and the workpieces are difficult to handle , and the number of processing equipment is large, the processing efficiency is low, and the processing cost is high. In automatic line production, it is more difficult to realize full automation. Most of the existing manufacturers of threaded joints of gas cylinders for vehicles generally still adopt the processing and production method of scattered processes and multiple clamping. The degree of production automation and processing efficiency are very low, and the accuracy is difficult to guarantee. Competitiveness is greatly reduced. In the future, the development of the automatic production line for threaded joints of vehicle gas cylinders will make machining relatively centralized, and special combined machine tools will be used. Therefore, it will be a good processing solution to use compound tool processing.

The existing drilling and reaming taper hole processes are carried out separately, first drilling, then reaming taper hole, two times of clamping, and two times of tool replacement. Clamping and changing the tool twice, the workload is large and time-consuming; 2. The machining accuracy is poor, which is not conducive to ensuring the coaxiality of the two hole machining; 3. The equipment investment is large, requiring two special machine tools and two sets of special fixtures. The production line lengthy. However, due to the difficulty in design and manufacture of hole machining tools combined with different types of tools, and the cutting amount of different tools is also different, so there is no such composite tool design at present, and different tools are still used for separate processing.

Utility model content

Aiming at the above-mentioned shortcomings in the prior art, the purpose of this utility model is to provide a composite cutting tool combining a drill bit and a reamer, which has high production efficiency, high processing precision, and can save equipment investment.

The technical scheme of the utility model is realized in the following way: a drill-reamer composite cutter, including a cutter head, a knife neck and a knife handle, is characterized in that: the cutter head is compounded by a drill bit and a reamer with a knife neck respectively , the neck of the drill bit and the front portion of the reamer are welded together through the speed change section, and the neck of the reamer is welded together with the neck of the knife handle front (the neck is the neck of the whole knife).

The reamer teeth are provided with spirally distributed trapezoidal chip breakers.

The drill bit is a twist drill.

The utility model has a simple structure, and compared with the prior art, it has the following beneficial effects:

1. Combining two different types of cutting tools, the two scattered processes are reasonably concentrated, the number of processes is shortened, the process is simplified, the time for clamping and tool changing is saved, and the production efficiency is improved.

2. It is beneficial to ensure the coaxiality of the two hole machining, and it is easier to adjust the tool setting, so the machining accuracy can be significantly improved.

3. It not only saves a set of special machine tools and special fixtures, but also shortens the production line and simplifies equipment design, thus improving the reliability of automation control while saving equipment procurement costs.

The utility model is convenient for sharpening replacement, has wide application prospects in high-efficiency and high-precision processing occasions, and also provides a new processing scheme for processing taper holes of other workpieces.

Description of drawings

Fig. 1 - structural representation of the utility model;

Figure 2 - left view of drill bit;

Figure 3 - Sectional view of the base of the reamer.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Referring to Fig. 1, it can be seen from the figure that the drill-reamer composite cutter of the present utility model comprises a cutter head, a knife neck 6 and a handle 7, and the cutter head is composed of a drill bit 1 and a reamer 4, and the drill bit 1 and the reamer Reamer 4 all has respective knife neck, and the knife neck 2 of drill bit and reamer front part are welded as a whole by speed changing section 3, and the knife neck 5 of reamer and the knife neck 6 of handle anterior portion (this knife neck is The knife neck of the whole knife) is welded as one. The two welds are required to be firmly welded to ensure that the coaxiality is 0.01mm. The handle adopts the national standard Morse No. 3 taper handle, the material is 40Cr, hardened HRC30-45.

As shown in Fig. 3, the reamer 4 is a rough reamer made of high-speed steel W18Cr4V, hardened HRC63-66. When reaming a tapered hole, due to the large amount of cutting, the work of the tool is relatively heavy, and the trapezoidal chip groove 8 distributed in a right-hand spiral is opened on the cutter tooth to facilitate chip removal.

The drill bit is a twist drill GB1478-78 of the national standard type, see Fig. 1 and Fig. 2 .

When working, the Mohs No. 3 tool holder is directly installed and matched with the machine tool spindle. First, the high-speed twist drill with a large cutting capacity is used for cutting. When the round through hole is processed, it enters the speed change stage. Feed at a small rotational speed prepares for rough reaming, followed by rough reaming taper, and finally retracts at the rough reaming spindle speed.

The utility model is specially designed for the combined processing of two processes of drilling and rough reaming and taper hole, and is suitable for any such occasions.

Claims (3)

1. A drill-reamer composite cutter, comprising a cutter head, a knife neck (6) and a handle (7), characterized in that: the cutter head is composed of a drill bit (1) and a reamer (4) with a knife neck respectively. Composite, the neck (2) of the drill bit and the front part of the reamer (4) are welded together through the speed change section (3), and the neck (5) of the reamer is welded to the neck (6) at the front of the handle as one. 2. The composite drill-reamer tool according to claim 1, characterized in that: said reamer teeth are provided with spirally distributed trapezoidal chip breakers (8). 3. The compound drill-reamer tool according to claim 1 or 2, characterized in that: the drill bit (1) is a twist drill.

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