CN204545590U - A kind of engine valve guide bush hole machined reamer - Google Patents

Abstract

The utility model discloses a reamer for machining a valve guide hole of a diesel engine, which comprises: a reamer head, a connecting rod and a clamping handle, and a supporting guide rod is arranged between the reamer head and the connecting rod, the The reamer head includes a first reamer edge, a first reamer edge, a second reamer edge, a second reamer edge, a third reamer edge, and a fourth reamer edge that are not equally divided and spirally arranged in sequence. Liquid outlet holes communicating with the central coolant hole are respectively arranged on the sides of the squeeze edge, the first reamer edge, the second squeeze edge, the second reamer edge, the third reamer edge and the fourth reamer edge. Through the above-mentioned method, the reamer for processing the valve guide hole of the diesel engine described in the utility model reduces the vibration under the high-speed working environment, improves the roughness of the processed hole, and the dispersed internal coolant supply system can be carried out at a higher cutting speed. Processing, high processing efficiency and long service life.

Description

A kind of reamer for machining valve guide hole of diesel engine

technical field

The utility model relates to the field of reamer design, in particular to a reamer for machining a valve guide hole of a diesel engine.

Background technique

The valve guide hole of the cylinder head, a key part of a diesel engine, requires high dimensional accuracy and requires a reamer for processing. However, when using a traditional reamer for processing, a pre-hole reamer needs to be added. It is difficult to guarantee the concentricity of the multiple processing tools, and the processing is stable. Poor performance and low processing efficiency.

In addition, because the material of the valve guide hole of the cylinder head is a special powder metallurgy material, which has high wear resistance and has a great impact on the tool life, the use of traditional reamers requires frequent tool changes, resulting in high scrap rates and time-consuming processing using traditional processes force.

Utility model content

The technical problem mainly solved by the utility model is to provide a high-efficiency and high-precision diesel engine valve guide hole machining reamer without pre-hole.

In order to solve the above-mentioned technical problems, a technical solution adopted by the utility model is to provide a reamer for processing the valve guide hole of a diesel engine, including: a reamer head, a connecting rod and a clamping handle, and the connecting rod is arranged on the reamer Between the head and the clamping handle, there is also a supporting guide rod between the reamer bit and the connecting rod, and a through-hole is arranged in the reamer bit, supporting guide rod, connecting rod and the clamping handle The central coolant hole, the reamer head includes the first squeeze edge, the first reamer edge, the second squeeze edge, the second reamer edge, the third reamer edge and the fourth reamer which are not equally divided and spirally arranged in sequence For the cutting edge, the sides of the first squeeze edge, the first reamer edge, the second squeeze edge, the second reamer edge, the third reamer edge and the fourth reamer edge are respectively provided with liquid outlets communicating with the central coolant hole. hole.

In a preferred embodiment of the utility model, the diameter of the support guide rod is larger than the diameter of the connecting rod.

In a preferred embodiment of the utility model, the central coolant hole is provided with a blocking cover outside the reamer head.

In a preferred embodiment of the present invention, the angle between the first reamer edge and the first reamer edge is 58°, and the angle between the first reamer edge and the second reamer edge is 63° , the angle between the second squeeze edge and the second reamer edge is 58°, the angle between the second reamer edge and the third reamer edge is 59°, the third reamer edge and the fourth reamer edge The angle between the cutting edges is 59°, and the angle between the fourth reamer edge and the first squeezing edge is 63°.

In a preferred embodiment of the present invention, the diameter of the clamping handle is larger than that of the connecting rod.

The beneficial effect of the utility model is: a kind of diesel engine valve guide hole processing reamer pointed out by the utility model has increased the support guide rod, which is convenient for the rotation and clamping of the external parts to improve the strength and stability, the first reamer blade, the second The reamer edge, the third reamer edge and the fourth reamer edge are responsible for reaming the hole, the first smoothing edge and the second smoothing edge are responsible for squeezing the circle, improving the smoothness of the hole wall, and can directly fine ream the valve without adding a pre-hole reamer In addition, the 6-blade unequal tooth distribution staggered wiper blade technology is used to reduce the vibration of the reamer in the high-speed working environment and improve the roughness of the processed hole. The dispersed internal coolant supply system can be used at a higher High cutting speed for processing, high processing efficiency and long service life.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work, wherein:

Fig. 1 is a structural schematic diagram of a preferred embodiment of a reamer for machining a valve guide hole of a diesel engine according to the present invention;

Figure 2 is an enlarged left view of Figure 1;

Fig. 3 is a perspective view of Fig. 1;

FIG. 4 is an enlarged view of part A in FIG. 3 .

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1 to Fig. 4, the utility model embodiment comprises:

A reamer for processing a valve guide hole of a diesel engine, comprising: a reamer head 1, a connecting rod 3 and a clamping handle 4, the connecting rod 3 is arranged between the reamer head 1 and the clamping handle 4, the reamer There is also a supporting guide rod 2 between the cutter head 1 and the connecting rod 3, the diameter of the supporting guide rod 2 is larger than that of the connecting rod 3, and the strength is high, which is convenient for clamping of external parts to improve the strength during processing and rotational stability.

The reamer head 1 includes a first squeeze edge 11, a first reamer edge 12, a second squeeze edge 13, a second reamer edge 14, a third reamer edge 15 and a fourth edge The reamer blade 16 adopts the technology of 6 blades with unequal tooth distribution and staggered tooth wiper blade technology, which reduces the vibration of the reamer in the high-speed working environment and improves the roughness of the processed hole. The angle between the first squeeze edge 11 and the first reamer edge 12 is 58°, the angle between the first reamer edge 12 and the second squeeze edge 13 is 63°, and the second squeeze edge The angle between the edge 13 and the second reamer edge 14 is 58°, the angle between the second reamer edge 14 and the third reamer edge 15 is 59°, and the third reamer edge 15 and the fourth reamer edge 16 The angle between them is 59°, and the angle between the fourth reamer edge 16 and the first squeezer edge 11 is 63°.

The reamer head 1, the support guide rod 2, the connecting rod 3 and the clamping handle 4 are provided with a through central coolant hole 5, and the first squeezing edge 11, the first reaming blade 12, the second squeezing edge Liquid outlet holes 17 communicating with the central cooling liquid hole 5 are respectively provided on the side surfaces of the smooth edge 13 , the second reamer edge 14 , the third reamer edge 15 and the fourth reamer edge 16 . Composed of a decentralized internal coolant supply system, it can be processed at a higher cutting speed, with high processing efficiency and extended service life.

The central coolant hole 5 is provided with a plugging cover outside the reamer head 1 .

During the production of reamers for processing valve guide holes of diesel engines, it is necessary to control the circular runout of the reamer head 1, the support guide rod 2, the connecting rod 3 and the clamping handle 4 within 0.003mm, and set the outer circle of the end of the clamping handle 4 A flat surface for easy gripping.

The reamer head 1 is made of extremely fine-grained hard alloy material, which can ensure that the tool can be processed at a high cutting speed (>50 m/min). The processing efficiency is more than 10 times that of the traditional reamer, and the hole roughness can be Guaranteed at Ra0.4, the hole cylindricity reaches 0.003 mm, the service life is high, and 1000 holes can be processed.

To sum up, the utility model provides a reamer for machining valve guide holes of diesel engines without pre-reaming, high processing efficiency, high precision holes and long service life.

The above descriptions are only examples of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the utility model description, or directly or indirectly used in other related technologies Fields are all included in the scope of patent protection of the utility model in the same way.

Claims (5)

1. an engine valve guide bush hole machined reamer, comprise: reamer cutter head, connecting rod and grip shank, described connecting rod is arranged between reamer cutter head and grip shank, it is characterized in that, a joint support guide rod is also provided with between described reamer cutter head and connecting rod, described reamer cutter head, support guide rod, through center cooling fluid apertures is provided with in connecting rod and grip shank, described reamer cutter head comprises not decile and the first burnishing-in sword of arranging of spiral successively, first reamer sword, second burnishing-in sword, second reamer sword, 3rd reamer sword and the 4th reamer sword, described first burnishing-in sword, first reamer sword, second burnishing-in sword, second reamer sword, 3rd reamer sword and the 4th hinge blade sides are respectively arranged with the fluid hole cooling fluid apertures with center and be connected.

2. engine valve guide bush hole machined reamer according to claim 1, is characterized in that, the diameter of described support guide rod is greater than the diameter of connecting rod.

3. engine valve guide bush hole machined reamer according to claim 1, is characterized in that, described center cooling fluid apertures is capping in reamer cutter head outer setting.

4. engine valve guide bush hole machined reamer according to claim 1, it is characterized in that, angle between described first burnishing-in sword and the first reamer sword is 58 °, angle between described first reamer sword and the second burnishing-in sword is 63 °, angle between described second burnishing-in sword and the second reamer sword is 58 °, angle between described second reamer sword and the 3rd reamer sword is 59 °, angle between described 3rd reamer sword and the 4th reamer sword is 59 °, and the angle between described 4th reamer sword and the first burnishing-in sword is 63 °.

5. engine valve guide bush hole machined reamer according to claim 1, is characterized in that, the diameter of described grip shank is greater than the diameter of connecting rod.