An inner groove processing method of an armature seat and an armature seat

Abstract

The application relates to an inner groove processing method of an armature seat and the armature seat. The inner groove processing method of the armature seat comprises the following steps: determining the length of iron filings generated in the processing according to the hole diameter of the armature seat to be processed and the diameter of a tool; calculating the feeding amount of the tool according to the length of the iron filings generated in the processing, the hole diameter of the armature seat to be processed and the back engagement amount of the tool; processing the armature seat to be processed according to the set spindle speed, the back engagement amount of the tool and the calculated feeding amount of the tool; and ending the processing when the hole diameter of the armature seat to be processed is greater than or equal to a preset hole diameter, so that the armature seat product with a deep ring inner groove is obtained. The application also provides an armature seat, and the inner groove of the armature seat is processed by the inner groove processing method. The application solves the problem that the existing deep inner ring groove processing method has a large processing difficulty and leads to poor precision.

Description

Technical Field

[0001] This invention relates to the field of marine dual-fuel medium testing technology, specifically to a method for machining the inner groove of an armature seat and the armature seat itself. Background Technology

[0002] In the field of marine dual-fuel testing, the injector assembly is one of the core components, and its performance directly affects the ship's power performance and emission levels. Within the injector assembly, the armature seat is a critical component, and its machining quality directly affects the injector's sealing performance, stability, and service life.

[0003] Traditional armature seat machining methods present numerous challenges when processing small inner ring deep grooves (diameter less than 10mm). These grooves have small diameters, poor tool rigidity, and require high surface roughness, making the machining process complex and difficult. Furthermore, the machining accuracy of these grooves is crucial to the overall performance of the injector; therefore, there is an urgent need to find a machining method that is both economical and efficient, as well as stable and reliable.

[0004] Currently, although there are some technologies for processing small inner ring deep grooves on the market, most of them suffer from problems such as high processing difficulty, high cost, low efficiency and poor stability, making it difficult to guarantee processing quality. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a method for machining the inner groove of an armature seat and an armature seat, so as to solve the problem that the existing machining methods for small inner ring deep grooves are difficult to machine and result in poor accuracy.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A method for machining the inner groove of an armature seat includes the following steps: The length of the iron filings generated during the machining process is determined based on the hole diameter of the armature seat to be machined and the cutting tool diameter. The feed rate of the tool is calculated based on the length of the iron filings generated during the machining process, the diameter of the hole in the armature seat to be machined, and the depth of cut of the tool. The armature seat to be machined is machined according to the set spindle speed, the depth of cutter, and the calculated feed rate of the cutter. When the hole diameter of the armature seat to be machined is greater than or equal to the preset hole diameter, the machining ends and the finished armature seat with a small inner ring groove is obtained.

[0007] Based on the aforementioned technical methods, the length of the metal chips generated during machining is first determined according to the hole diameter of the armature seat to be machined and the tool diameter. This effectively avoids the problem of excessively long metal chips scratching the machined hole wall. Then, combined with the hole diameter of the armature seat to be machined and the depth of cut of the tool, the feed rate of the tool is further determined. Finally, the armature seat to be machined is machined in conjunction with the set spindle speed and the depth of cut of the tool, further effectively controlling the length of the metal chips generated during machining. This effectively ensures machining quality and avoids the problem of difficult machining due to setting the feed rate based on human experience. Simultaneously, the surface roughness of the inner groove after machining using the above method meets the actual requirements, offering multiple advantages: reduced machining costs, improved machining efficiency and stability, and efficient and precise machining of the small inner ring deep groove of the armature seat. This solves the problem of high machining difficulty and poor accuracy in existing small inner ring deep groove machining methods.

[0008] Preferably, the length of the iron filings generated during the machining process is set as L, in mm; the diameter of the hole in the armature seat to be machined is D, in mm; the depth of cut of the tool is ap, in mm; and the number of spindle rotations is N, in r; then the feed rate of the tool is F = D × 3.14 × ap / 2NL, and the feed rate of the tool F is in mm / r.

[0009] By accurately calculating the feed rate of the tool based on the length of the iron filings generated during the machining process, the diameter of the hole in the armature seat to be machined, and the depth of cut of the tool, the precise control of the tool feed rate is achieved, which reduces the machining difficulty while ensuring machining quality.

[0010] Preferably, the length L of the iron filings generated during the machining process is equal to the difference between the hole diameter of the armature seat to be machined and the tool diameter, divided by 2, i.e., L = (DD) 刀 ) / 2, where D represents the diameter of the hole in the armature seat to be machined, in mm. 刀 This indicates the diameter of the cutting tool, in mm.

[0011] The length L of the iron filings generated during the initial machining process should be controlled between 0.1mm and 0.7mm. The tool diameter is generally around 4mm.

[0012] Preferably, the hole diameter D of the armature seat to be processed is equal to the sum of the hole diameter of the armature seat to be processed after the previous processing and the depth of cut; wherein, the initial value of the hole diameter of the armature seat to be processed is the hole diameter of the unprocessed armature seat to be processed.

[0013] Preferably, when the length L of the iron filings generated during the processing is greater than the preset iron filings length, the number of passes is increased.

[0014] Wherein, the preset iron chip length is 0.7 mm. That is, it is required to control the length L of iron chips generated during machining to be less than or equal to 0.7 mm. When the length L of iron chips generated during machining is greater than 0.7 mm, the number of feed strokes is appropriately increased to control L within 0.7 mm.

[0015] Preferably, after each machining is completed, the tool retracts backward from the current position by a preset retraction value; The preset retraction value is 2×F×N, with the unit being mm.

[0016] Preferably, the preset retraction value is 2×F×N mm, and the preset retraction feed is F mm / r.

[0017] Preferably, when the spindle speed is set as S, 200r / min < S < 600r / min is satisfied.

[0018] Preferably, the set spindle speed S is 400r / min.

[0019] It is proved by cutting tests that when the spindle speed is greater than or equal to 600 r / min, tool vibration will occur during cutting, which results in unqualified cutting quality; when a spindle speed less than or equal to 200 r / min is adopted, under the condition of constant feed, the rotation speed is slow and the machining time is long; when the spindle speed S satisfies 200r / min < S < 600r / min, no vibration occurs during machining, cutting is smooth, and the efficiency is high.

[0020] Preferably, the depth of cut ap of the tool is 0.001mm~0.003mm.

[0021] It is proved by cutting tests that, since the blade width of the tool is about 2mm, the contact between the blade and the inner hole of the workpiece is relatively wide. If the depth of cut is greater than 0.003mm, tool deflection will occur during cutting, leading to unqualified machining accuracy.

[0022] Preferably, the depth of cut ap of the tool is 0.001mm.

[0023] Wherein, it is measured during the cutting test that when the depth of cut is set to 0.01mm, the tool deflection is 0.003mm; when the depth of cut is set to 0.005mm, the tool deflection is 0.001mm; and when the depth of cut is set to 0.003mm, there is almost no tool deflection, and the tool deflection can be neglected.

[0024] Preferably, a chip dividing groove is provided at the cutting edge of the tool for machining the armature seat to be processed.

[0025] By setting chip grooves at the cutting edge of the tool, the cutting width of the chips is effectively reduced, which not only reduces cutting resistance and vibration, but also facilitates chip removal.

[0026] Preferably, the chip-dispersing grooves comprise two spaced apart.

[0027] The present invention also provides an armature holder, wherein the inner groove of the armature holder is processed by the inner groove processing method described in the present invention.

[0028] The beneficial effects of this invention are: The method for machining the inner groove of the armature seat of the present invention first determines the length of the iron filings generated during machining based on the hole diameter and tool diameter of the armature seat to be machined, effectively avoiding the problem of excessively long iron filings scratching the machined hole wall. Then, combined with the hole diameter of the armature seat to be machined and the depth of cut of the tool, the feed rate of the tool is further determined. Finally, the armature seat to be machined is machined in combination with the set spindle speed and the depth of cut of the tool, further effectively controlling the length of the iron filings generated during machining, thereby effectively ensuring the machining quality and avoiding the problem of difficult machining due to the difficulty in controlling the machining process caused by setting the feed rate based on human experience. At the same time, the surface roughness of the inner groove after machining using the above method also meets the actual requirements, which has multiple advantages, reduces machining costs, improves machining efficiency and stability, and realizes efficient and precise machining of the deep inner annular groove of the armature seat. It has promotion and application value in the field of marine dual-fuel medium testing technology. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the finished armature holder of the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of the cutting tool's structure; Among them, 1-finished armature seat, 11-small inner ring deep groove; 2-tool, 21-chip divider groove. Detailed Implementation

[0030] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0031] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0032] The present invention aims to disclose a method for machining the inner groove of an armature seat and an armature seat, so as to solve the problem that the existing machining methods for small inner ring deep grooves are difficult to machine and result in poor quality.

[0033] One method for machining the inner groove of an armature seat includes the following steps: The length of the iron filings generated during the machining process is determined based on the hole diameter of the armature seat to be machined and the cutting tool diameter. The feed rate of the tool is calculated based on the length of the iron filings generated during the machining process, the diameter of the hole in the armature seat to be machined, and the depth of cut of the tool. The armature holder is machined according to the set spindle speed, tool depth of cut, and calculated tool feed rate. Machining ends when the diameter of the hole in the armature holder is greater than or equal to the preset hole diameter. Figure 1 and Figure 2 As shown, the finished armature seat 1 with a small inner ring deep groove 11 is obtained.

[0034] The above method first determines the length of the metal chips generated during machining based on the hole diameter of the armature seat and the tool diameter, effectively avoiding the problem of excessively long metal chips scratching the machined hole wall. Then, combining the hole diameter of the armature seat and the depth of cut of the tool, the feed rate of the tool is further determined. Finally, the armature seat is machined using the set spindle speed and the depth of cut, further effectively controlling the length of the metal chips generated during machining, thus ensuring machining quality and avoiding the problem of difficult machining due to setting the feed rate based on human experience. Simultaneously, the surface roughness of the inner groove machined using this method meets actual requirements, offering multiple advantages: reduced machining costs, improved machining efficiency and stability, and efficient and precise machining of small inner ring deep grooves in armature seats. This solves the problem of high machining difficulty and poor quality in existing methods for machining small inner ring deep grooves.

[0035] The above-described method, developed through practical exploration and parameter testing, yielded a reasonable machining approach. This method employs advanced machining equipment and processes, combined with precision fixtures and cutting tools, to achieve efficient and precise machining of small inner ring deep grooves. Simultaneously, it emphasizes the stability and reliability of the machining process, ensuring that the machined armature seat parts meet high-standard quality requirements. This method possesses significant advantages and potential in the field of marine dual-fuel medium testing, particularly in the machining of armature seat parts for injector assemblies. By adopting advanced machining methods and equipment, this approach enables efficient and precise machining of small inner ring deep grooves, improving machining quality and stability, reducing machining costs, and providing strong technical support for the development of marine dual-fuel medium testing.

[0036] In some embodiments, in order to achieve precise control of the tool feed rate, so as to reduce the machining difficulty while ensuring machining quality, the length of the iron chips generated during the machining process is set as L, in mm; the diameter of the hole of the armature seat to be machined is D, in mm; the depth of cut of the tool is ap, in mm; and the number of spindle rotations is N, in r; then the tool feed rate F = D × 3.14 × ap / 2NL, and the tool feed rate F is in mm / r.

[0037] Where N equals 1r, NL / D×3.14 is the proportion of chip breaking length to chip length per revolution of the spindle, and ap / 2×F is the proportion of depth of cut per revolution of the spindle.

[0038] In some embodiments, the length L of the iron filings generated during machining is equal to the difference between the hole diameter of the armature seat to be machined and the tool diameter, divided by 2, i.e., L = (DD) 刀 ) / 2, where D represents the diameter of the hole in the armature seat to be machined, in mm. 刀 This indicates the diameter of the cutting tool, in mm.

[0039] The length L of the iron filings generated during the initial machining process should be controlled between 0.1mm and 0.7mm. The tool diameter is generally around 4mm.

[0040] In some embodiments, the hole diameter D of the armature seat to be processed is equal to the sum of the hole diameter of the armature seat to be processed after the previous processing and the depth of cut; wherein, the initial value of the hole diameter of the armature seat to be processed is the hole diameter of the unprocessed armature seat to be processed.

[0041] In some embodiments, when the length L of the iron filings generated during the machining process is greater than the preset iron filings length, the number of passes is increased.

[0042] Wherein, the preset iron chip length is 0.7mm. That is, it is required to control the length L of iron chips generated during processing to be less than or equal to 0.7mm. When the length L of iron chips generated during processing is greater than 0.7mm, appropriately increase the number of feed passes to control L within 0.7mm.

[0043] In some embodiments, after each processing is completed, the tool retracts backward from the current position by a preset retraction value.

[0044] In some embodiments, the preset retraction value is 2×F×N, with the unit being mm.

[0045] In some embodiments, if the spindle speed is set as S, then 200r / min < S < 600r / min.

[0046] By way of example, the set spindle speed S is 400r / min.

[0047] Cutting tests have proved that when the spindle speed is greater than or equal to 600 r / min, tool vibration will occur during cutting processing, resulting in unqualified cutting quality; when a spindle speed less than or equal to 200 r / min is adopted, with a constant feed rate, the rotation speed is low and the processing time is long; when the spindle speed S satisfies 200r / min < S < 600r / min, no vibration occurs during processing, cutting is smooth, and the efficiency is high.

[0048] In some embodiments, the depth of cut ap of the tool is 0.001mm~0.003mm.

[0049] By way of example, the depth of cut ap of the tool is 0.001mm.

[0050] Cutting tests have proved that, since the cutting edge width of the tool is about 2mm, the contact between the cutting edge and the inner hole of the workpiece is relatively wide, if the depth of cut is greater than 0.003mm, tool yielding will occur during cutting, resulting in unqualified processing accuracy.

[0051] Wherein, measurements during the cutting test show that when the depth of cut is set to 0.01mm, the tool yielding amount is 0.003mm; when the depth of cut is set to 0.005mm, the tool yielding amount is 0.001mm; and when the depth of cut is set to 0.001mm, there is almost no tool yielding amount, and the tool yielding amount can be neglected.

[0052] In some embodiments, as Figure 3 shown, in order to reduce the cutting width of iron chips, thereby reducing cutting resistance and vibration and facilitating iron chip cleaning, a chip dividing groove 21 is provided at the cutting edge of a tool 2 for processing an armature seat to be processed.

[0053] By way of example, the chip dividing grooves 21 comprise two grooves arranged at intervals.

[0054] In some embodiments, an armature seat is also provided, wherein the inner groove of the armature seat is processed by the inner groove processing method of any of the above embodiments.

[0055] For the deep annular inner groove of the armature seat part, the actual machining procedure is as follows: Based on machining experience, the initial value of the chip length L is determined to be 0.7 mm. An equation is established based on the hole diameter D of the armature holder to be machined, the chip length L, and the depth of cut ap and feed rate F: F = D × 3.14 × ap / 2NL, to determine the feed rate F. Here, the depth of cut ap is the amount of cutting per spindle revolution, ap = 0.001 mm, the initial value of the hole diameter D of the armature holder to be machined is 4.2 mm, and N represents the number of spindle revolutions in revolutions (r).

[0056] Set the spindle speed S=400r / min and the depth of cut ap=0.001mm.

[0057] S=400r / min; indicates that the spindle speed is 400 revolutions per minute; ap=0.001mm; indicates that the depth of cut of the tool per pass is 0.001mm; D0=4.2; indicates that the armature seat part is machined starting from a hole with a diameter of ∅4.2; R2=7.5; indicates the maximum diameter of the inner groove after machining the armature seat part; R4=4; indicates the diameter of the cutting tool; WHILE D n <R2; indicates that if D n Less than R2, where D n Indicates the diameter D of the hole in the armature seat to be machined; D n =D n-1 +ap; indicates that the diameter of the armature seat to be machined is the diameter of the previous armature seat to be machined plus ap, where D n D represents the diameter of the hole in the armature holder to be machined. n-1 This indicates the diameter of the hole in the armature seat to be processed in the previous operation, ap = 0.001 mm, and n is greater than or equal to 1.

[0058] IF D n ≥R2; indicates that the condition is met if D n The value is greater than or equal to R2; D n =R2; indicates that D is executed. n The value of is equal to R2; ENDIF; indicates the end of the IF statement.

[0059] L=(D-R4) / 2; This means that the length L of the iron chip is equal to the difference between the hole diameter D of the armature seat to be machined and the tool diameter R4 divided by 2; where, based on experience, the initial diameter of the tool ϕ is judged to be 4mm, the hole diameter ϕ of the armature seat to be machined is 4.2mm, the gap is 0.2mm, and the calculated initial length of the iron chip is 0.1~0.7mm, which is considered appropriate. The generated iron chips can be smoothly discharged from the hole. As the groove is continuously machined, the gap between the tool and the hole increases, and the chip removal space increases. IF L>0.7; indicates that when the length L of the iron filings is greater than 0.7 mm; L=0.7; Increase the number of passes to control the length of the chip to 0.7mm; ENDIF; indicates the end of the IF statement; F = D × 3.14 × ap / 2NL G1 X=D n F indicates that the tool moves along the X direction to D. n The feed rate is F; R6=F×N×2 G1 X=D n -R6 F; indicates that the tool will retract R6mm from this position, and the feed rate of the tool during retraction is F; ENDWHILE indicates the end of the processing.

[0060] Comparative Example 1 The existing method for machining the inner groove of an armature seat part includes the following steps: Among them, the diameter of the hole in the armature seat part is Φ4.2, which is machined with a grooving cutter with a Φ4 tool bar and a blade width of 2mm; The procedure is as follows: G1 X4.4 F0.02 grooving, feed rate is 0.02mm / r (meaning that for every revolution of the spindle, the depth of cut is 0.02mm; to machine to a dimension of Φ4.4, the spindle needs to rotate 10 times, and the circumference of one revolution is 4.4*3.14=13.8mm. Excessive chip length and small chip space can easily lead to hole wall scratches and tool damage). X4 X-axis retraction tool G0 Z5 Z-direction retraction tool X100 X-axis retraction 100mm M0 (Hook Iron Scrap) Suspend processing of iron scrap.

[0061] The problems with the above method are: segmented processing, with the hook removing iron filings after each processing, resulting in low efficiency and poor processing quality.

[0062] Comparative Example 2 The existing method for machining the inner groove of an armature seat part includes the following steps: By controlling the depth of cut, the grooving tool retracts a certain distance after each machining step to facilitate chip breaking. With a depth of cut of 0.001mm per pass, the depth of cut is very small, and the tool retracts before it deflects, thus ensuring machining quality. The procedure is as follows: D=4 R² = 7.5 WHILE D<R2 D n =D n-1 +ap IF D>R2 ENDIF G1 X=D n F0.01 G1 X=R1-0.02 F0.05 ENDWHILE The problem with this machining method is that it does not take into account the changes in the hole diameter D of the armature seat to be machined, the length of the iron chip, and the feed rate. If machining a relatively large groove size, this method will result in a longer cutting length as the diameter increases, and chip clogging is likely to occur as the diameter increases.

[0063] In summary, the method for machining the inner groove of the armature seat of the present invention first determines the length of the iron filings generated during machining based on the hole diameter and tool diameter of the armature seat to be machined, effectively avoiding the problem of excessively long iron filings scratching the machined hole wall. Then, combining the hole diameter of the armature seat to be machined and the depth of cut of the tool, the feed rate of the tool is further determined. Finally, the armature seat to be machined is machined in combination with the set spindle speed and the depth of cut of the tool, further effectively controlling the length of the iron filings generated during machining, thereby effectively ensuring the machining quality and avoiding the problem of difficult machining due to the difficulty in controlling the machining process caused by setting the feed rate based on human experience. At the same time, the surface roughness of the inner groove after machining using the above method also meets the actual requirements, which has multiple advantages, reduces machining costs, improves machining efficiency and stability, and realizes efficient and precise machining of the deep inner annular groove of the armature seat. It has promotional application value in the field of marine dual-fuel medium testing technology.

[0064] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.

Claims

1. A method for machining the inner groove of an armature seat, characterized in that, Includes the following steps: The length of the iron filings generated during the machining process is determined based on the hole diameter of the armature seat to be machined and the cutting tool diameter. The feed rate of the tool is calculated based on the length of the iron filings generated during the machining process, the diameter of the hole in the armature seat to be machined, and the depth of cut of the tool. The armature seat to be machined is determined based on the set spindle speed, tool depth of cut, and calculated tool feed rate. Machining ends when the diameter of the hole in the armature seat is greater than or equal to the preset hole diameter, resulting in a finished armature seat with an inner ring groove. The length of the metal chips generated during machining is set as L (mm); the diameter of the hole in the armature seat to be machined is D (mm); the tool depth of cut is ap (mm); and the number of spindle rotations is N (r). Therefore, the tool feed rate F = D × 3.14 × ap / 2NL, where F is in mm / r. The length L of the metal chips generated during machining is equal to the difference between the hole diameter of the armature seat to be machined and the tool diameter, divided by 2, i.e., L = (DD / L). 刀 ) / 2, where D represents the diameter of the hole in the armature seat to be machined, in mm. 刀 This indicates the diameter of the cutting tool, in mm.

2. The method for machining the inner groove of the armature seat according to claim 1, characterized in that, The diameter D of the hole in the armature seat to be processed is equal to the sum of the hole diameter of the armature seat to be processed after the previous processing and the depth of cut; wherein, the initial value of the hole diameter of the armature seat to be processed is the hole diameter of the unprocessed armature seat to be processed.

3. The method for machining the inner groove of the armature seat according to claim 1, characterized in that, When the length L of the iron filings generated during the machining process is greater than the preset iron filings length, the number of passes is increased.

4. The method for machining the inner groove of the armature seat according to claim 1, characterized in that, After each machining operation, the tool retracts from its current position to a preset retraction value. The preset backoff value is 2×F×N, and the unit is mm.

5. The method for machining the inner groove of the armature seat according to claim 1, characterized in that, If the spindle speed is set to S, then it is 200 r / min. <S<600r / min。 6. The method for machining the inner groove of the armature seat according to claim 1, characterized in that, The depth of cut (ap) of the cutting tool is 0.001mm to 0.003mm.

7. The method for machining the inner groove of the armature seat according to claim 1, characterized in that, Chip-breaking grooves are provided at the cutting edge of the tool used to machine the armature seat.

8. An armature holder, characterized in that, The inner groove of the armature seat is processed by the inner groove processing method as described in any one of claims 1 to 7.

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