CN216801850U

CN216801850U - Machining tool for special-shaped connecting valve body

Info

Publication number: CN216801850U
Application number: CN202220433072.5U
Authority: CN
Inventors: 陈新言; 马建华
Original assignee: Haiyan Dingsheng Machinery Co ltd
Current assignee: Haiyan Dingsheng Machinery Co ltd
Priority date: 2022-03-01
Filing date: 2022-03-01
Publication date: 2022-06-24
Anticipated expiration: 2032-03-01

Abstract

The utility model relates to a processing cutter for a special-shaped connecting valve body, which comprises a milling part and an external connecting rod, wherein the milling part comprises a transition section and a cutter head, the diameter of the transition section is larger than that of the cutter head, an inclined reinforcing section for improving the rigidity of the cutter is formed by connecting the transition section and the cutter head, at least five spiral side edges are arranged on the cutter head along the axial direction of the cutter head, the spiral angle of each spiral side edge is 40-50 degrees, the front angle is 15-18 degrees, and the thickness of a core of the cutter head is 7.3-8.5 mm. According to the utility model, the diameter of the transition section is increased, and the inclined reinforcing section is arranged at the connecting position of the transition section and the cutter head, so that the stress at the connecting position is smaller than that of the traditional right angle or sharp angle, and further the fracture is less prone to occurring, the increase of the helix angle of the helical side edge can generate low radial force and reduce the bending degree of the cutter, the risk of fracture is reduced, the increase of the front angle reduces the magnitude of the cutting resistance, the cutter becomes sharper, the processing is easier and more stable, and the increase of the core thickness improves the bending resistance and the rigidity of the cutter.

Description

Machining tool for special-shaped connecting valve body

Technical Field

The utility model belongs to the technical field of machine tool machining tools, and particularly relates to a machining tool for a special-shaped connecting valve body.

Background

At present, the milling cutter of all kinds of specifications can be used to process the valve body usually, but the valve body has structure of different length usually because the real demand is processed these valve bodies, a milling cutter has been used usually in the current production and processing, its helix angle is 30, the anterior angle is 8, the core thickness is at 6.1mm, when in actual use, because the reason of the bore depth requires that the cutter overhang is very long, but the diameter of milling cutter has been carried out the restriction again because the size in aperture simultaneously, consequently current milling cutter has rigidity inadequately usually and processes unstable condition and appears, great cutting force can make the milling cutter that traditional rigidity is not enough appear the beat and lead to the fracture when processing, the efficiency of production and qualification rate can greatly reduced, the cost of production has also been increased.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide a machining tool for a special-shaped connecting valve body, which can improve the rigidity of the whole tool and the stability of the tool in the machining process.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a processing cutter for a special-shaped connecting valve body comprises a milling part and an external connecting rod, wherein the milling part comprises a transition section and a cutter head, the diameter of the transition section is larger than that of the cutter head, an inclined reinforcing section for improving the rigidity of the cutter is formed by connecting the transition section and the cutter head, at least five spiral side edges are arranged on the cutter head along the axial direction of the cutter head, the spiral angle of each spiral side edge is 40-50 degrees, the front angle is 15-18 degrees, and a cutting edge zone is arranged on each spiral side edge and ranges from 0.01 mm to 0.03 mm; the thickness of the cutter head core is 7.3-8.5 mm.

When the valve body is machined, the diameter of the transition section is larger than that of the tool bit, so that the bending resistance and rigidity of the valve body are improved, the inclined reinforcing section arranged at the connecting part of the transition section and the tool bit can reduce stress, the integral strength of the connected tool bit and the transition section is further improved, the fracture cannot easily occur, in addition, for the arranged spiral side edge, the spiral angle of the spiral side edge is increased to 40-50 degrees, so that low radial force can be generated, the bending degree of a tool is reduced, and the machining stability of the tool is improved, and the fracture is prevented; the rake angle is increased to 15-18 degrees, so that the cutting resistance is reduced, the cutter is sharper, and the cutting is easier; the thickness of the cutter head core is increased to 7.3-8.5mm so as to improve the diameter thickness of the cutter body, further improve the rigidity and the bending resistance of the cutter and reduce the risk of fracture; the arrangement of the edge band plays the roles of guiding scraps and polishing holes.

Preferably, the inclined reinforcing section forms an angle of 45 degrees with the axial direction A of the cutter head, and the inclined plane is uniformly arranged along the circumference of the joint of the transition section and the cutter head. The slope is strengthened evenly arranging of section and is 45 contained angles with the tool bit axial, and the effect that the section was strengthened in the slope is compared in that the stress here is littleer for intensity improves greatly, and the slope is strengthened the section and evenly arranges in changeover portion and tool bit junction circumference and can be so that no matter in which angle direction, the stress is all even, has improved cutter machining's stability and rigidity.

Preferably, the helical side edge has a helix angle α of 40 °, a rake angle β of 16 °, a land D1 of 0.02mm, and a core thickness D2 of 8.35 mm. In this case, the rigidity of the tool is optimal as long as the size of the hole diameter to be machined is satisfied.

Preferably, the diameter of the external connecting rod is larger than that of the transition section, and a chamfer angle is arranged at the joint of the external connecting rod and the transition section. The chamfer angle is arranged to improve the strength of the joint of the extension rod and the transition section, so that the stress of the joint is smaller than that of the traditional right-angle or sharp-angle arrangement, and the strength is improved.

Preferably, the spiral side edges are spirally arranged from the top end to the tail end of the cutter head, and the chip grooves are formed between every two adjacent spiral side edges. The chip grooves mainly play a role in guiding chips and prevent the chips from being blocked to cause the cutter to break during machining.

Preferably, after the spiral side edge is connected with the transition section, a containing section which does not perform cutting is reserved at the end part of the spiral side edge, and the containing section is configured to form avoidance by reserving a corresponding allowance when the cutter performs cutting.

The size degree of depth of processing is guaranteed on the one hand in the setting of tolerance section, and on the other hand can prevent to mill the problem that the step appears in the in-process.

Preferably, the length d of the tolerance segment is 5 mm. The length of the tolerance section can meet the requirement of size depth during machining, and the condition that the whole cutter is too long to cause poor bending resistance and break easily is prevented.

Preferably, the spiral side edge is at least divided into a first spiral side edge and a second spiral side edge, and the tolerance section is also at least divided into a first tolerance section and a second tolerance section; the first spiral side edge axially extends to the connecting position of the transition section and the tool bit along the tool bit, and the first containing section is positioned at the connecting position of the transition section and the tool bit; the second spiral side edge extends to the transition section along the axial direction of the cutter head, and the second containing section is positioned on the transition section.

The first tolerance section is positioned at the joint of the transition section and the tool bit and is used for machining a product with a small hole depth, the machining size of the tool can be met by the first tolerance section, and the problem that the transition section touches the product to cause deflection of the tool to form a step can be prevented; and the second lets the section to be located the changeover portion, in order to improve the rigidity of cutter, increases the diameter of changeover portion under the condition of not touching the hole inside wall, and then improves the rigidity, has also guaranteed the demand of machining dimension degree of depth simultaneously, prevents that unnecessary part from touching the product and causing the beat of cutter.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the diameter of the transition section is increased, and the inclined reinforcing section is arranged at the connecting position of the transition section and the cutter head, so that the stress at the connecting position is smaller than that of the traditional right angle or sharp angle, and further the fracture is less prone to occurring, the strength of the transition section is improved, meanwhile, for the increase of each size of the spiral side edge and the thickness of the cutter head core, the increase of the spiral angle of the spiral side edge can generate low radial force and reduce the bending degree of the cutter, the processing stability is improved, the fracture risk is reduced, the increase of the front angle reduces the size of the cutting resistance, the cutter becomes sharper, the processing is easier and more stable, and the bending resistance and the rigidity of the cutter are improved by the increase of the core thickness.

The even circumference of slope reinforcement section arranges for the stress in each angular direction is all relatively even, has further improved its stability and intensity, and the setting of chip pocket and tolerance section is also for making processing more convenient, prevents to add jam or other circumstances that man-hour caused the influence.

Drawings

FIG. 1 is a first front view of the overall structure of the present invention;

FIG. 2 is a second front view of the overall structure of the present invention;

FIG. 3 is a top view of a tool tip configuration of the present invention;

fig. 4 is a cross-sectional view of a tool tip configuration of the present invention.

Description of the drawings: 1. a milling section; 2. an extension rod; 3. a transition section; 4. a cutter head; 5. an inclined reinforcing section; 6. a helical side edge; 6a, a first helical side edge; 6b, a second helical side edge; 7. a tolerance section; 7a, a first tolerance section; 7b, a second capacity section; 8. a chip pocket; 9. and (6) chamfering.

α: helix angle

Beta: front angle

D1: edge zone

D2: the core is thick.

Detailed Description

The following describes a detailed embodiment of the present invention with reference to the accompanying drawings.

In the embodiment, the specific structure of the processing tool for the special-shaped connecting valve body is shown in fig. 1-4, the processing tool comprises a milling part 1 and an external connecting rod 2, the milling part 1 comprises a transition section 3 and a tool bit 4, the diameter of the transition section 3 is larger than that of the tool bit 4, an inclined reinforcing section 5 for improving the rigidity of the tool is formed at the connection of the transition section 3 and the tool bit 4, at least five spiral side edges 6 are arranged on the tool bit 4 along the axial direction of the tool bit, the spiral angle of each spiral side edge 6 is 40-50 degrees, the front angle is 15-18 degrees, and a blade zone is arranged on each spiral side edge 6 and ranges from 0.01 mm to 0.03 mm; the thickness of the core of the tool bit 4 is 7.3-8.5 mm.

When the valve body is machined, the milling part 1 is used for machining a product, the external connecting rod 2 is connected with an external equipment device to provide power, and the external connecting rod specifically drives the cutter head 4 to mill the product; the diameter of changeover portion 3 is greater than 4 diameters of bull, and the rigidity of the member that adds thickly is stronger, is formed with cascaded step simultaneously in the junction of the two, is provided with slope reinforcement section 5 in this junction, can further improve its intensity and rigidity, compares in the design of traditional right angle or closed angle, and slope reinforcement section 5 makes the stress of here compare in the right angle littleer, and then makes it more firm, the more difficult fracture.

In addition, compared with the traditional 30 degrees, the spiral angle of the spiral side edge 6 is increased by 10 degrees to 20 degrees, the increase of the spiral angle can generate low radial force and reduce the bending degree of the cutter, the machining stability of the cutter is improved, the risk of breakage is reduced, compared with the traditional cutter, the rake angle is increased by 7 degrees to 8 degrees, the increase of the rake angle reduces the size of the cutting resistance, and the cutter is more stable; the cutting edge is arranged along the spiral direction to form the diameter size, has the functions of chip guiding and unthreaded hole, and is equivalent to the auxiliary cutting edge of the spiral side edge 6; the core thickness is increased by 1.2-2.3mm, and the size of the core is increased by the blade body of the cutter head 4, so that the strength and the rigidity are improved.

As shown in FIG. 1, the inclined reinforcing section 5 forms an angle of 45 degrees with the axial direction A of the cutter head 4, and is inclined and uniformly arranged along the circumference of the joint of the transition section 3 and the cutter head 4. The slope is strengthened section and is 45 contained angles and set up to the inclined plane with the tool bit axial for form a good transition between changeover portion 3 and the tool bit 4, and evenly arrange along the junction circumference of the two and make the stress in each angle direction even, it is littleer to compare in traditional right angle setting stress, has further improved its holistic intensity.

When the helix angle alpha of the spiral side edge 6 is 40 degrees, the rake angle beta is 16 degrees, the edge zone D1 is 0.02mm, and the core thickness D2 is 8.35mm, on the premise of meeting the requirement of no interference in milling of the cutter, the rigidity and the strength of the cutter are optimal, and the cutting of products is easier.

As shown in figures 1-2, the diameter of the extension rod 2 is larger than that of the transition section 3, and a chamfer 9 is arranged at the joint of the extension rod 2 and the transition section 3. The diameter of the extension rod 2 is larger than that of the transition section 3, the diameter of the rod is increased on the basis of meeting milling conditions as much as possible, so that the rigidity of the rod is improved, transition is formed between the extension rod 2 and the transition section 3 due to the arrangement of the chamfer 9, and compared with the arrangement of a right angle, the stress is smaller, so that the rod is firmer.

The spiral side edges 6 are spirally arranged from the top end to the tail end of the cutter head 4, and chip flutes 8 are formed between every two adjacent spiral side edges 6. The chip grooves 8 are mainly used for guiding milled chips and preventing the chip from being broken when the cutter is machined due to blockage, the cutter is mainly used for finish machining, the cutting allowance is small, only small chip grooves 8 are needed, the small chip grooves 8 are matched with the upper cutter head 4, the core thickness is increased, the rigidity of the cutter is improved, and meanwhile better surface quality can be obtained.

And after the spiral side edge 6 is connected with the transition section 3, a containing section 7 which is not used for cutting is reserved at the end part of the spiral side edge 6, and the containing section 7 is configured to form avoidance by reserving a corresponding allowance when the cutter is used for cutting. The allowance section 7 is arranged to meet the size depth of the cutter during machining, and can prevent the step problem caused by deflection caused by the fact that the redundant part of the cutter except the machining section touches the product.

The length d of the tolerance section 7 is 5 mm. The further limited dimension of the length of the tolerance section 7 ensures the requirement of the depth of the machining dimension on one hand, and can prevent the risk of easy fracture caused by poor bending resistance due to overlong dimension of the cutter on the other hand.

As shown in fig. 1 and 2, the spiral side edge 6 is at least divided into a first spiral side edge 6a and a second spiral side edge 6b, and the tolerance section 7 is also at least divided into a first tolerance section 7a and a second tolerance section 7 b; the first spiral side edge 6a axially extends to the connecting position of the transition section 3 and the tool bit 4 along the tool bit 4, and the first tolerance section 7a is positioned at the connecting position of the transition section 3 and the tool bit 4; the second helical flank edge 6b extends axially along the cutting head 4 onto the transition section 3, and the second relief section 7b is located on the transition section 3.

The first spiral side edge 6a and the second spiral side edge 6b are arranged for processing two holes with different specifications, the first spiral side edge 6a and the second spiral side edge 6b are used for meeting the requirement of processing size depth during processing, the situation that the rest parts of the cutter except for a processing and milling section are contacted with a product, deflection is easily caused, and then fracture occurs is prevented, the first tolerance section 7a is arranged at the connecting position of the transition section 3 and the cutter head 4, the part with smaller depth of the processing hole, the second tolerance section 7b is arranged on the transition section 3 and is the part with larger depth of the processing hole, the second tolerance section 7b extending to the transition section 3 will not touch the inner wall of the hole, only ensuring enough milling length on the tool bit 4, if not extending to the transition section 3, the length of the cutter head 4 needs to be increased so that the bending resistance of the entire cutter becomes poor and the cutter is more likely to break.

The above description of the present invention is intended to be illustrative. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. A processing cutter for a special-shaped connecting valve body comprises a milling part (1) and an external connecting rod (2), and is characterized in that the milling part (1) comprises a transition section (3) and a cutter head (4), the diameter of the transition section (3) is larger than that of the cutter head (4), an inclined reinforcing section (5) for improving the rigidity of the cutter is formed by connecting the transition section (3) and the cutter head (4), at least five spiral side edges (6) are arranged on the cutter head (4) along the axial direction of the cutter head, the spiral angle of each spiral side edge (6) is 40-50 degrees, the front angle is 15-18 degrees, and a cutting edge zone is 0.01-0.03mm on each spiral side edge (6); the thickness of the core of the tool bit (4) is 7.3-8.5 mm.

2. The machining tool for the special-shaped connecting valve body as claimed in claim 1, wherein the inclined reinforcing section (5) is at an angle of 45 degrees with the axial direction A of the cutter head (4), and the inclined plane is uniformly arranged along the circumference of the connection part of the transition section (3) and the cutter head (4).

3. The machining tool for the special-shaped connecting valve body as claimed in claim 1, wherein the helix angle α of the helical side edge (6) is 40 °, the rake angle β is 16 °, the margin D1 is 0.02mm, and the core thickness D2 is 8.35 mm.

4. The machining tool for the special-shaped connecting valve body as claimed in claim 1, wherein the diameter of the extension rod (2) is larger than that of the transition section (3), and a chamfer (9) is arranged at the joint of the extension rod (2) and the transition section (3).

5. The machining tool for the special-shaped connecting valve body as claimed in claim 1, wherein the spiral side edges (6) are spirally arranged from the top end to the tail end of the cutter head (4), and chip flutes (8) are formed between every two adjacent spiral side edges (6).

6. The machining tool for the special-shaped connecting valve body as claimed in claim 1, characterized in that a containing section (7) which does not cut is reserved at the end of the spiral side edge (6) after the spiral side edge (6) is connected with the transition section (3), and the containing section (7) is configured to be reserved with a corresponding allowance for the tool to form an avoidance when the tool is used for cutting.

7. The machining tool for the special-shaped connecting valve body as claimed in claim 1, characterized in that the length d of the tolerance section (7) is 5 mm.

8. The machining tool for the special-shaped connecting valve body as claimed in claim 6, wherein the spiral side edge (6) is divided into at least a first spiral side edge (6 a) and a second spiral side edge (6 b), and the tolerance section (7) is also divided into at least a first tolerance section (7 a) and a second tolerance section (7 b); the first spiral side edge (6 a) axially extends to the connecting position of the transition section (3) and the cutter head (4) along the cutter head (4), and the first tolerance section (7 a) is positioned at the connecting position of the transition section (3) and the cutter head (4); the second spiral side edge (6 b) axially extends to the transition section (3) along the tool bit (4), and the second tolerance section (7 b) is positioned on the transition section (3).