CN204075320U - Valve seat hole forming knife - Google Patents

Abstract

The utility model discloses a disk seat hole shaping sword, its characterized in that: comprises a cutter bar, wherein the end part of the cutter bar is symmetrically provided with chip grooves, and a forming section, a reaming section and a drilling section, the diameters of which are changed from large to small, are sequentially arranged, the chip grooves extend to the forming section, the reaming section and the drilling section from the cutter bar, and the forming section, the reaming section and the drilling section are divided into two parts which are oppositely arranged by a chip groove, each part of the drilling section comprises a conical cutter point, the tool nose is provided with a drilling front tool face, a second drilling rear tool face intersected with the first drilling rear tool face and the first drilling rear tool face, each part of the reaming section is provided with a reaming front cutter surface, a first reaming rear cutter surface and a second reaming rear cutter surface, the shoulder part of each part of the reaming section is provided with a transition front cutter surface, a first transition rear cutter surface and a second transition rear cutter surface, the shoulder of each part of the forming section is provided with a forming front cutter face, a first forming rear cutter face and a second forming rear cutter face.

Description

Valve seat hole forming knife

technical field

The utility model relates to a processing cutter, in particular to a valve seat hole forming cutter.

Background technique

It is used to process the valve seat of the air-conditioning compressor. The valve seat requires high precision and requires no air leakage during the sealing fit. In the past, when using ordinary tools to process the valve seat, it needs to be divided into multiple steps and replaced with multiple tools. In the process of changing steps, it needs to be clamped and repositioned every time, which makes it difficult to guarantee the accuracy.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides a valve seat hole forming knife with high processing precision.

The technical scheme that the utility model solves its technical problem adopts is:

The valve seat hole forming knife is characterized in that: it includes a knife rod, and the end of the knife rod is symmetrically provided with chip removal grooves, and sequentially provided with forming sections, reaming sections and drilling sections whose diameters change from large to small. The chip flute extends from the cutter bar to the forming section, the reaming section and the drilling section, and the forming section, the reaming section and the drilling section are divided into two opposite parts by the chip flute, and each part of the drilling section Each includes a tapered tool tip, and the tool tip is provided with a drilling rake face, a first drilling flank and a second drilling flank intersecting with the first drilling flank. Each portion of the reaming section is provided with a reaming rake face, a first reaming flank and a second reaming flank, and each portion of the reaming section has a transitional rake face, The first transitional flank and the second transitional flank, the shoulder of each part of the forming section is provided with a forming rake face, a first forming flank and a second forming flank, the drilling front The cutter face, the reaming rake face, the transitional rake face and the forming rake face are all formed by the groove wall of the chip flute.

The first forming flank intersects with the forming rake face to form a cutting edge, which is composed of three sections of arcs with different radians and one section of straight line connection.

The three sections of arcs with different radians are R1, R2, R3 respectively, and 0.2mm≤R1≤0.4mm, 0.8mm≤R2≤1mm, 0.2mm≤R3≤0.4mm.

The rake face of the reamed hole forms an angle of 90° with the flank face of the first reamed hole.

The first reaming hole flank is an arc-shaped surface, the reaming rake face and the first reaming hole flank intersect to form a reaming cutting edge, and the arc-shaped surface extends along the reaming cutting edge to the first The reaming flank slopes down.

The beneficial effects of the utility model are: the valve seat hole forming knife includes a knife rod, and the end of the knife rod is symmetrically provided with chip removal grooves, and successively provided with forming sections, reaming sections and drilling sections whose diameters change from large to small , the chip flute extends from the tool bar to the forming section, reaming section and drilling section, so drilling, reaming and reaming can be completed correspondingly through different working sections, and the convex ring formed on the edge plane of the hole Process, all the above processes can be completed with only one positioning, not only the processing efficiency is high, but also the processing accuracy is guaranteed.

Description of drawings

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

Fig. 1 is a perspective view of the utility model;

Fig. 2 is the front view of the utility model;

Fig. 3 is the attached enlarged view of the utility model;

Fig. 4 is an enlarged view at A in Fig. 2 .

Detailed ways

Referring to Fig. 1 to Fig. 4, the utility model discloses a valve seat hole forming knife, which includes a cylindrical knife bar 1, and the end of the knife bar is symmetrically provided with chip removal grooves 2, and successively provided with diameters that change from large to small. Forming section 3, reaming section 4 and drilling section 5, the chip flute 2 extends from the cutter bar to forming section 3, reaming section 4 and drilling section 5, and forming section 3, reaming section 4 and The drilling section 5 is divided into two parts oppositely arranged by the chip flute 2, and each part of the drilling section 5 includes a conical tool tip 6, and the tool tip 6 is provided with a drilling rake face, a second A borehole flank 7 and a second borehole flank 8 intersecting the first borehole flank 7, a tapered tip 6 and the first borehole flank 7 are used to drill on the valve seat Each part of the reaming section 4 is provided with a reaming rake face, a first reaming flank 9 and a second reaming flank 10, through which the first reaming flank 9 can align the hole Carry out fine reaming, thereby obtain the aperture size with higher precision and the smoothness of hole wall, the shoulder of each part of described reaming section 4 is all provided with transitional rake face, first transitional flank (not shown in the figure out) and the second transitional flank 11, the intersection line formed by the intersection of the first transitional flank and the wall of the flute 2 is an oblique straight line to form the transitional cutting edge, because the transitional cutting edge is used for reaming, so the transitional cutting The edge is an oblique straight line, which is convenient to gradually expand the hole to a predetermined size. The shoulder of each part of the forming section 3 is provided with a forming rake face, a first forming flank 12 and a second forming flank 13, and the second forming flank 13. A formed flank 12 is used for processing the plane of the predetermined orifice and the convex ring on the plane. The convex ring and the plane are important sealing contact surfaces for the sealing fit of the valve seat, so the precision requirement is high. The cutter face, the reaming rake face, the transitional rake face and the forming rake face are all formed by the groove wall of the chip flute.

As shown in the figure, the first formed flank 12 intersects with the formed rake face to form a formed cutting edge, which is composed of three sections of arcs with different radians and a straight line connection, and the three sections of arcs with different radians Respectively R1, R2, R3, and 0.2mm≤R1≤0.4mm, 0.8mm≤R2≤1mm, 0.2mm≤R3≤0.4mm, the predetermined shape of the convex ring can be processed through the above three arcs.

Further, the first reaming hole flank 9 is an arcuate surface, the reaming rake face and the first reaming hole flank 9 intersect to form a reaming cutting edge, and the arcuate surface cuts along the reaming hole From the edge to the second reaming hole, the flank 10 is inclined and lowered. Through the above-mentioned structure, the change of the cutting amount of the tool during high-speed chip cutting is small, so that the effect of high cutting precision and high finish can be achieved.

Furthermore, the rake face of the reaming hole forms an angle of 90° with the flank face 9 of the first reaming hole. In the above structure, due to the angle setting of the rake face of the reaming hole, the cutting force of the cutting edge of the reaming hole is weak, so its unit The amount of cutting time is small, so that the effect of high cutting precision and high finish can be achieved.

The above is a detailed introduction to a valve seat hole forming knife provided by the embodiment of the present invention. In this paper, a specific example is used to illustrate the principle and implementation of the present invention. The description of the above embodiment is only used to help Understand the method of the utility model and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the utility model, there will be changes in the specific implementation and scope of application. In summary, this description The content should not be construed as limiting the utility model.

Claims (5)

1. valve seat orifice forming cutter, it is characterized in that: comprise knife bar, knife bar end symmetric is provided with chip area, and be provided with the profiled section of the descending change of diameter successively, fraising section and boring section, described chip area extends to profiled section by knife bar, fraising section and boring section, and profiled section, fraising section and boring section are divided into the two parts be oppositely arranged by chip area, every part of described boring section includes a taper point of a knife, described point of a knife is provided with boring rake face, after first boring knife face and with this first hole after crossing second the holing rear knife face of knife face, every part of described fraising section is equipped with fraising rake face, knife face and the rear knife face of the second fraising after first fraising, the shoulder of every part of described fraising section is equipped with transition rake face, knife face after knife face and the second transition after First Transition, the shoulder of every part of described profiled section is provided with shaping rake face, first shaping rear knife face and the second shaping rear knife face, described boring rake face, fraising rake face, the cell wall that transition rake face and shaping rake face are chip area is formed.

2. valve seat orifice forming cutter according to claim 1, is characterized in that: described first shaping rear knife face is crossing with shaping rake face forms cutting edge, and this cutting edge is connected and composed by the camber line of three sections of different radians and one section of straight line.

3. valve seat orifice forming cutter according to claim 2, is characterized in that: the camber line of described three sections of different radians is respectively R1, R2, R3, and 0.2mm≤R1≤0.4mm, 0.8mm≤R2≤1mm, 0.2mm≤R3≤0.4mm.

4. valve seat orifice forming cutter according to claim 1, is characterized in that: after described fraising rake face and first reams, knife face at an angle of 90.

5. valve seat orifice forming cutter according to claim 1, it is characterized in that: after described first fraising, knife face is an arcwall face, described fraising rake face and the rear knife face of the first fraising crossing formation fraising cutting edge, and this arcwall face tilts to reduce along the rear knife face of cutting edge to the first fraising that reams.