A drilling process

Abstract

This invention relates to the field of drilling technology, and more particularly to a drilling process comprising the following steps: obtaining the straightness of the hole during several drilling operations; determining the working height of the electric grinder based on the variance of the hole straightness; determining the first corresponding pressure of the drill bit of the electric grinder based on the temperature rise rate of the electric grinder shell, or preliminarily determining that the interference of high-pressure equipment on the electric grinder exceeds the allowable range; adjusting the corresponding volume of coolant added based on the hole roughness; determining the second corresponding pressure of the drill bit based on the drill bit deformation of the electric grinder; fixing the electric grinder on the base at the determined working height, and drilling with the electric grinder according to the re-determined drill bit pressure; injecting the determined volume of coolant into the hole during the drilling process to cool both the hole and the drill bit of the electric grinder. This invention improves drilling stability.

Description

Technical Field

[0001] This invention relates to the field of drilling technology, and more particularly to a drilling process. Background Technology

[0002] Drilling refers to the operation of making holes in solid materials using a drill bit. With the rapid development of drilling technology, due to the different functions of parts in mechanical products, the internal holes of different structures have different precision and surface quality requirements. However, during drilling, the main problem is the defects in the structure of the drill bit, which affect the processing quality. A high-quality drilling process can improve the roughness of the drill hole and reduce the occurrence of white marks and hole defects.

[0003] Chinese Patent Publication No. CN109209222A discloses a drilling process, characterized by the following steps: a) Drilling with a large drill bit to a predetermined depth to form a large hole, then withdrawing the drill bit from the large hole, leaving a debris layer at the bottom; b) Inserting a casing coaxially into the large hole, extending the casing into the debris layer; c) Gradually pouring cement material between the inner wall of the large hole and the outer wall of the casing, while simultaneously supplying a high-flow-rate gas into the casing; d) After the cement material is poured in, stopping the supply of high-flow-rate gas; e) After the cement material has solidified, inserting a small drill bit into the bottom of the large hole and continuing drilling to a predetermined depth to form a small hole. Using this invention, the entire large hole is virtually free of debris particles, thus ensuring smooth subsequent drilling and improving drilling efficiency. Therefore, it can be seen that the drilling process has the problem that the heat generated by the electric grinder during the drilling process is concentrated on the electric grinder's power cord due to wind, which leads to a decrease in power supply stability and consequently a decrease in drilling stability. Summary of the Invention

[0004] Therefore, the purpose of this invention is to provide a drilling process to overcome the problem in the prior art where the heat generated during the drilling process of the electric grinder is concentrated on the electric grinder's power cord due to wind, which leads to a decrease in power supply stability and consequently a decrease in drilling stability.

[0005] To achieve the above objectives, the present invention provides a drilling process comprising the following steps: obtaining the straightness of the hole during several drilling processes; determining the working height of the electric mill based on the variance of the hole straightness, or preliminarily determining that the drilling stability is below the allowable range, and obtaining the temperature of the electric mill shell for the same drilling time in a single operation; determining the first corresponding pressure of the drill bit of the electric mill based on the temperature rise rate of the electric mill shell, or preliminarily determining that the interference of high-pressure equipment on the electric mill exceeds the allowable range, and obtaining the drilling roughness; adjusting the corresponding volume of coolant added based on the drilling roughness; determining the second corresponding pressure of the drill bit based on the drill bit deformation of the electric mill; fixing the electric mill on the base at the determined working height, and drilling the hole according to the re-determined drill bit pressure; and injecting the corresponding volume of coolant into the hole during the drilling process.

[0006] Furthermore, the step of determining the working height of the electric mill includes: Obtain the straightness of the borehole during several drilling processes; and calculate the variance of the straightness of the borehole. The variance of the straightness of the hole is compared with a preset first variance and a preset second variance, respectively. If the variance of the straightness of the hole is less than the preset first variance, the working height of the electric mill is determined.

[0007] Furthermore, the working height of the electric grinder is determined by the difference between the preset first variance and the variance of the straightness of the hole.

[0008] Further, the step of determining the first corresponding pressure of the drill bit of the electric grinder includes: If the variance of the straightness of the hole is greater than or equal to the preset first variance and less than the preset second variance, it is preliminarily determined that the connection stability of the drill bit is lower than the allowable range, and the temperature of the electric mill shell for the same drilling time is obtained to calculate the temperature rise rate of the electric mill shell. The rate of temperature rise of the electric motorcycle casing is compared with a preset first rate and a preset second rate, respectively; If the temperature rise rate of the electric mill casing is greater than the preset first rate and less than or equal to the preset second rate, the connection stability of the drill bit is determined to be lower than the allowable range, and the drill bit of the electric mill drills with the first corresponding pressure.

[0009] Furthermore, the first corresponding pressure of the drill bit of the electric mill is determined by the difference between the temperature rise rate of the electric mill casing and the preset first rate.

[0010] Furthermore, the formula for calculating the rate of temperature rise of the electric motorcycle casing is as follows:

[0011] Where R is the rate of temperature rise of the electric mill casing. The temperature of the electric grinder casing at the end of a single drilling operation. The temperature of the electric grinder casing is at the start of a single drilling operation, t is the drilling duration, and t is a natural number greater than or equal to 1.

[0012] Further, the step of determining the corresponding volume of coolant to be added is as follows: If the temperature rise rate of the electric mill casing is greater than the preset second rate, it is preliminarily determined that the interference of the high-pressure equipment on the electric mill exceeds the allowable range, and the drilling roughness is obtained. The borehole roughness is compared with the preset roughness; If the borehole roughness is greater than the preset roughness, a secondary determination is made that the interference of the high-pressure equipment on the electric mill exceeds the allowable range, and the corresponding volume of coolant to be added is determined.

[0013] Furthermore, the corresponding volume of coolant added is determined by the difference between the preset roughness and the borehole roughness.

[0014] Further, the step of determining the second corresponding pressure of the drill bit of the electric grinder includes: Obtain the drill bit deformation of the electric grinder; The drill bit deformation of the electric grinder is compared with the preset deformation. If the deformation of the drill bit of the electric grinder is greater than the preset deformation, it is determined that the wear of the drill bit exceeds the allowable range, and the drill bit of the electric grinder drills a hole with a second corresponding pressure.

[0015] Furthermore, the second corresponding pressure of the drill bit of the electric mill is determined by the difference between the drill bit deformation and the preset deformation.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The process of the present invention, by setting a preset first variance and a preset second variance, determines the working height of the electric grinder when the variance of the straightness of the hole is less than the preset first variance, thereby reducing the impact of heat generated by the electric grinder during drilling due to wind accumulating on the electric grinder's power cord and causing a decrease in power supply stability; the first corresponding pressure of the drill bit of the electric grinder is determined according to the temperature rise rate of the electric grinder shell, reducing the impact of the increased vibration of the electric grinder causing the temperature of the electric grinder shell to rise too quickly, thus affecting the connection stability of the drill bit; when the high-voltage equipment is close to the electric grinder, the strong magnetic field generated by the high-voltage equipment interferes with the control signal of the electric grinder, causing control errors, which in turn leads to increased vibration of the electric grinder and an increase in hole temperature, thus affecting the degree of interference generated by the high-voltage equipment on the electric grinder, further improving drilling stability.

[0017] Furthermore, the process described in this invention determines the working height of the electric grinder by setting a preset first variance and a preset second variance, based on the fact that the variance of the straightness of the hole is less than the preset first variance. This reduces the impact of heat generated during the drilling process of the electric grinder accumulating on the electric grinder's power cord due to wind, which leads to a decrease in power supply stability, and further improves drilling stability.

[0018] Furthermore, the process described in this invention, by setting a preset first rate and a preset second rate, determines the drill bit of the electric mill with a first corresponding pressure when the temperature rise rate of the electric mill shell is greater than the preset first rate. This reduces the impact on the connection stability of the drill bit caused by the excessively rapid temperature rise of the electric mill shell due to the increased vibration of the electric mill, thereby further improving the drilling stability.

[0019] Furthermore, the process described in this invention, by setting a preset roughness, when the high-pressure equipment is close to the electric mill, the strong magnetic field generated by the high-pressure equipment interferes with the control signal of the electric mill, causing control errors, which in turn leads to increased vibration of the electric mill and an increase in hole temperature. This affects the degree of interference generated by the high-pressure equipment on the electric mill, thereby further improving the drilling stability.

[0020] Furthermore, the process described in this invention, by setting a preset deformation variable, determines the second corresponding pressure of the drill bit of the electric mill based on the deformation variable of the drill bit, thereby reducing the impact of excessive drill bit pressure on the wear of the drill bit caused by deformation, and further improving drilling stability. Attached Figure Description

[0021] Figure 1 This is an overall flow chart of the drilling process according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the drilling device in the drilling process of an embodiment of the present invention; Figure 3 This is a flowchart illustrating the steps involved in determining the working height of the electric grinder during the drilling process according to an embodiment of the present invention. Figure 4 This is a flowchart illustrating the specific steps of determining the first corresponding pressure of the drill bit in the drilling process of the electric grinder according to an embodiment of the present invention. Detailed Implementation

[0022] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0023] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] Please see Figure 1 , Figure 2 , Figure 3 as well as Figure 4 The diagrams shown are, respectively, an overall flowchart of the drilling process of an embodiment, a structural schematic diagram of the drilling device, a detailed flowchart of the steps for determining the working height of the electric mill, and a detailed flowchart of the steps for determining the first corresponding pressure of the drill bit of the electric mill. The present invention provides a drilling process, comprising the following steps: Obtain the straightness of the hole during several drilling processes; The working height of the electric mill is determined based on the variance of the straightness of the hole, or the stability of the drilling is initially determined to be below the allowable range, and the temperature of the electric mill shell is obtained for the same drilling time in a single operation. The first corresponding pressure of the drill bit of the electric mill is determined based on the temperature rise rate of the electric mill shell, or it is preliminarily determined that the interference of high pressure equipment on the electric mill exceeds the allowable range, and the roughness of the drill hole is obtained. The corresponding volume of coolant added is adjusted based on the borehole roughness. The second corresponding pressure of the drill bit is determined based on the drill bit deformation of the electric grinder; The electric grinder is fixed on the base at the determined working height, and the electric grinder drills holes according to the newly determined drill bit pressure. During the drilling process, the corresponding volume of coolant is injected into the hole.

[0025] Specifically, the variance of the straightness of the hole is the variance of the straightness of several holes of the same depth output from several drilling operations. The calculation method of the variance of the straightness of the hole is a conventional technical means well known to those skilled in the art, so the calculation process of the variance of the straightness of the hole will not be described in detail here.

[0026] Specifically, the drilling equipment includes: Base 14, used to support the electric grinder; An electric telescopic rod 13, which is connected to the base, is used to adjust the working height of the electric grinder; The main body 15 of the electric grinder is used to drill holes in the workpiece to be drilled; Fixing clamp 3, which is connected to the main body of the electric grinder, is used to fix the electric grinder; Drill bit 5, which is connected to the main body of the electric mill; Conveyor belt 10 is used to provide forward propulsion for the part to be drilled.

[0027] Telescopic clamp 9, which is connected to the conveyor belt, is used to fix the part to be drilled and to move the part to be drilled. The drilled part 7 is connected to the telescopic clamp; The first hole 6 is connected to the drilled part; The second hole 8 is connected to the drilled part.

[0028] Specifically, the straightness of the hole is detected by an inner hole straightness tester 11 set on a fixing clamp.

[0029] Specifically, the temperature of the electric mill housing 1 is detected by a temperature sensor 2 installed on the electric mill housing 1.

[0030] Specifically, the borehole roughness is detected by a surface finish tester 12 mounted on a fixed clamp.

[0031] Specifically, the deformation of the drill bit is measured by a displacement sensor 4 located between the clamp and the drill bit.

[0032] Specifically, the pressure of the drill bit of the electric grinder is adjusted by rotating the pressure regulating knob (not shown in the figure) in the drill bit sleeve.

[0033] Specifically, the high-voltage equipment includes a voltage transformer and a high-voltage distribution box.

[0034] The process described in this invention, by setting a preset first variance and a preset second variance, determines the working height of the electric grinder when the variance of the straightness of the hole is less than the preset first variance. This reduces the impact of heat generated during drilling by the electric grinder accumulating on the electric grinder's power cord due to wind, which could lead to a decrease in power supply stability. Furthermore, by determining the first corresponding pressure of the drill bit based on the temperature rise rate of the electric grinder's outer shell, the impact of increased vibration on the drill bit's connection stability is reduced. When the high-voltage equipment is close to the electric grinder, the strong magnetic field generated by the high-voltage equipment interferes with the control signal of the electric grinder, causing control errors and increasing the electric grinder's vibration and hole temperature. This further improves the interference caused by the high-voltage equipment, thus enhancing drilling stability.

[0035] Please see Figure 3 As shown, the steps for determining the working height of the electric mill include: Obtain the straightness of the borehole during several drilling processes; and calculate the variance of the straightness of the borehole. The variance of the straightness of the hole is compared with a preset first variance and a preset second variance, respectively. If the variance of the straightness of the hole is less than the preset first variance, the working height of the electric mill is determined.

[0036] Please see Figure 3 As shown, the working height of the electric grinder is determined by the difference between the preset first variance and the variance of the straightness of the hole.

[0037] Specifically, if the variance of the straightness of the hole is less than the preset first variance, the stability of the borehole is determined to be below the allowable range.

[0038] Specifically, the process of determining the working height of the electric mill is as follows: If △M≤△M0, the working height of the electric mill is adjusted to the first height using a preset first height adjustment coefficient; If △M>△M0, the working height of the electric mill is adjusted to the second height using a preset second height adjustment coefficient; Specifically, the variance of the straightness of the hole is denoted as M, the preset first variance is denoted as M1, the preset second variance is denoted as M2, the difference between the preset first variance and the variance of the straightness of the hole is denoted as ΔM, ΔM is set as M1-M, ΔM0 is the preset variance difference, the preset first height adjustment coefficient is denoted as α1, the preset second height adjustment coefficient is denoted as α2, where 1<α1<α2, M1<M2, the working height of the electric grinder is denoted as E, the adjusted working height of the electric grinder is denoted as E', and E' is set as E×(1+αh) / 2, where αh is the preset h-th height adjustment coefficient, and h is set as 1, 2.

[0039] The process described in this invention determines the working height of the electric grinder by setting a preset first variance and a preset second variance, based on the fact that the variance of the straightness of the hole is less than the preset first variance. This reduces the impact of heat generated during the drilling process of the electric grinder accumulating on the electric grinder's power cord due to wind, which leads to a decrease in power supply stability, and further improves drilling stability.

[0040] Please continue reading. Figure 4 As shown, the step of determining the first corresponding pressure of the drill bit of the electric grinder includes: If the variance of the straightness of the drill hole is greater than or equal to the preset first variance and less than the preset second variance, it is preliminarily determined that the connection stability of the drill bit is lower than the allowable range, and the temperature of the electric mill shell during a single drilling time is obtained in order to calculate the temperature rise rate of the electric mill shell. The rate of temperature rise of the electric motorcycle casing is compared with a preset first rate and a preset second rate, respectively; If the temperature rise rate of the electric mill casing is greater than the preset first rate and less than or equal to the preset second rate, the connection stability of the drill bit is determined to be lower than the allowable range, and the drill bit of the electric mill drills with the first corresponding pressure.

[0041] Please continue reading. Figure 4 As shown, the first corresponding pressure of the drill bit of the electric mill is determined by the difference between the temperature rise rate of the electric mill shell and the preset first rate.

[0042] Please continue reading. Figure 4 As shown, the formula for calculating the rate of temperature rise of the electric motorcycle casing is:

[0043] Where R is the rate of temperature rise of the electric mill casing. The temperature of the electric grinder casing at the end of a single drilling operation. The temperature of the electric grinder casing is at the start of a single drilling operation, t is the drilling duration, and t is a natural number greater than or equal to 1.

[0044] Specifically, the first corresponding pressure of the drill bit of the electric grinder includes a first pressure and a second pressure.

[0045] Specifically, the process of determining the first corresponding pressure of the drill bit of the electric grinder is as follows: If △R≤△R0, the first corresponding pressure of the drill bit of the electric mill is adjusted to the first pressure using a preset first pressure adjustment coefficient; If ΔR > ΔR0, the first corresponding pressure of the drill bit of the electric mill is adjusted to the second pressure using a preset second pressure adjustment coefficient.

[0046] Specifically, the temperature rise rate of the electric mill casing is denoted as R, the preset first rate is denoted as R1, the preset second rate is denoted as R2, the difference between the temperature rise rate of the electric mill casing and the preset first rate is denoted as ΔR, ΔR0 is the preset rate difference, and ΔR is set to R-R1. The preset first pressure adjustment coefficient is denoted as β1, the preset second pressure adjustment coefficient is denoted as β2, where 1 < β1 < β2, R1 < R2, the first corresponding pressure of the electric mill drill bit is denoted as K, and the adjusted first corresponding pressure of the electric mill drill bit is denoted as K', and K' is set to K×βj, where βj is the preset j-th pressure adjustment coefficient, and j = 1, 2.

[0047] The process described in this invention sets a preset first rate and a preset second rate. When the temperature rise rate of the electric mill shell is greater than the preset first rate, the drill bit of the electric mill is determined to be subjected to a first corresponding pressure. This reduces the impact on the connection stability of the drill bit caused by the excessively rapid temperature rise of the electric mill shell due to the increased vibration of the electric mill. This further improves the drilling stability.

[0048] Please see Figure 1 As shown, the steps for determining the corresponding volume of coolant to be added are as follows: If the temperature rise rate of the electric mill casing is greater than the preset second rate, it is preliminarily determined that the interference of the high-pressure equipment on the electric mill exceeds the allowable range, and the drilling roughness is obtained. The borehole roughness is compared with the preset roughness; If the borehole roughness is greater than the preset roughness, a secondary determination is made that the interference of the high-pressure equipment on the electric mill exceeds the allowable range, and the corresponding volume of coolant to be added is determined.

[0049] Please see Figure 4 As shown, the corresponding added volume of the coolant is determined by the difference between the preset roughness and the borehole roughness.

[0050] Specifically, the corresponding volume of coolant added includes a first volume and a second volume.

[0051] Specifically, the process of determining the corresponding volume of coolant to be added is as follows: If △Q≤△Q0, the corresponding added volume of the coolant is adjusted to the first volume using a preset first volume adjustment coefficient; If △Q>△Q0, the corresponding added volume of the coolant is adjusted to the second volume using a preset second volume adjustment coefficient.

[0052] Specifically, the borehole roughness is denoted as Q, the preset roughness is denoted as Q0, the difference between the preset roughness and the borehole roughness is denoted as ΔQ, ΔQ0 is the preset roughness difference, and ΔQ is set to Q0-Q. The preset first volume adjustment coefficient is denoted as γ1, the preset second volume adjustment coefficient is denoted as γ2, where 1 < γ1 < γ2. The corresponding volume of coolant added is denoted as N, and the corresponding volume of coolant added after adjustment is denoted as N', and N' is set to N×(1+γj) / 2, where γj is the preset j-th volume adjustment coefficient, and j = 1, 2.

[0053] The process described in this invention, by setting a preset roughness, when the high-pressure equipment is close to the electric mill, the strong magnetic field generated by the high-pressure equipment interferes with the control signal of the electric mill, causing control errors, which in turn leads to increased vibration of the electric mill and an increase in hole temperature. This affects the degree of interference generated by the high-pressure equipment on the electric mill, further improving drilling stability.

[0054] Please see Figure 1 As shown, the step of determining the second corresponding pressure of the drill bit of the electric grinder includes: Obtain the drill bit deformation of the electric grinder; The drill bit deformation of the electric grinder is compared with the preset deformation. If the deformation of the drill bit of the electric grinder is greater than the preset deformation, it is determined that the wear of the drill bit exceeds the allowable range, and the drill bit of the electric grinder drills a hole with a second corresponding pressure.

[0055] Please see Figure 1 As shown, the second corresponding pressure of the drill bit of the electric mill is determined by the difference between the drill bit deformation and the preset deformation.

[0056] Specifically, the second corresponding pressure of the drill bit of the electric grinder includes a third pressure and a fourth pressure.

[0057] Specifically, the process of determining the second corresponding pressure of the drill bit of the electric grinder is as follows: If △D≤△D0, the second corresponding pressure of the drill bit of the electric mill is adjusted to the third pressure using the preset fourth pressure adjustment coefficient; If △D>△D0, the second corresponding pressure of the drill bit of the electric mill is adjusted to the fourth pressure using a preset third pressure adjustment coefficient.

[0058] Specifically, the drill bit deformation of the electric grinder is denoted as D, the preset deformation is denoted as D0, the difference between the drill bit deformation and the preset deformation is denoted as ΔD, and ΔD is set as D - D0, where ΔD0 is the preset deformation difference. The preset third pressure adjustment coefficient is denoted as β3, and the preset third pressure adjustment coefficient is denoted as β4, where 0 < β3 < β4. The second corresponding pressure of the drill bit of the electric grinder is denoted as K”, and K” is set as K” = K’ × βp, where βp is the preset p-th pressure adjustment coefficient, and p = 3, 4.

[0059] The process described in this invention, by setting a preset deformation value, determines the second corresponding pressure of the drill bit of the electric grinder based on the deformation value of the drill bit, thereby reducing the impact of excessive drill bit pressure on the wear of the drill bit caused by deformation, and further improving drilling stability.

[0060] Example 1

[0061] In this embodiment 1, when R > R0, the first corresponding pressure K of the drill bit of the electric mill is adjusted according to the difference between the temperature rise rate of the electric mill shell and the preset first rate, denoted as ΔR. The temperature rise rate of the electric mill shell is denoted as R, the preset first rate as R1, the preset second rate as R2, the difference between the temperature rise rate of the electric mill shell and the preset first rate as ΔR, ΔR0 as the preset rate difference, ΔR = R - R1, the preset first pressure adjustment coefficient as β1, the preset second pressure adjustment coefficient as β2, where 1 < β1 < β2, R1 < R2, the first corresponding pressure of the drill bit of the electric mill as K, and the adjusted first corresponding pressure of the drill bit of the electric mill as K'. R1 = 5℃ / s, R2 = 8℃ / s, β1 = 1.1, β2 = 1.2, ΔR0 = 3℃ / s, K = 15N. In this embodiment 1, R = 0.7℃ / s. In this embodiment 1, ΔR = 7℃ / s - 5℃ / s = 2℃ / s. It is determined that ΔR > ΔR0 and the first corresponding pressure of the drill bit of the electric mill is adjusted to K' using the preset first pressure adjustment coefficient β1. K' = 15N × 1.1 = 16.5N is calculated.

[0062] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A drilling process, characterized in that, Includes the following steps: Obtain the straightness of the hole during several drilling processes; The working height of the electric mill is determined based on the variance of the straightness of the hole, or the stability of the drilling is initially determined to be below the allowable range, and the temperature of the electric mill shell is obtained for the same drilling time in a single operation. The first corresponding pressure of the drill bit of the electric mill is determined based on the temperature rise rate of the electric mill shell, or it is preliminarily determined that the interference of high pressure equipment on the electric mill exceeds the allowable range, and the roughness of the drill hole is obtained. The corresponding volume of coolant added is adjusted based on the borehole roughness. The second corresponding pressure of the drill bit is determined based on the drill bit deformation of the electric grinder; The electric grinder is fixed on the base at the determined working height, and the electric grinder drills holes according to the newly determined drill bit pressure. During the drilling process, the corresponding volume of coolant is injected into the hole, wherein... The steps for determining the working height of the electric mill include: Obtain the straightness of the borehole during several drilling processes; and calculate the variance of the straightness of the borehole. The variance of the straightness of the hole is compared with a preset first variance and a preset second variance, respectively. If the variance of the straightness of the hole is less than the preset first variance, the working height of the electric mill is determined. The working height of the electric mill is determined by the difference between the preset first variance and the variance of the straightness of the hole; If the variance of the straightness of the hole is greater than or equal to the preset first variance and less than the preset second variance, it is preliminarily determined that the connection stability of the drill bit is lower than the allowable range, and the temperature of the electric mill shell for the same drilling time is obtained to calculate the temperature rise rate of the electric mill shell. The rate of temperature increase of the electric mill casing is compared with a preset first rate and a preset second rate, respectively; If the temperature rise rate of the electric mill shell is greater than the preset first rate and less than or equal to the preset second rate, the connection stability of the drill bit is determined to be lower than the allowable range, and the drill bit of the electric mill drills with the first corresponding pressure. The first corresponding pressure of the drill bit of the electric mill is determined by the difference between the temperature rise rate of the electric mill casing and the preset first rate.

2. The drilling process according to claim 1, characterized in that, The formula for calculating the rate of temperature rise of the electric mill casing is as follows: Where R is the rate of temperature rise of the electric mill casing. The temperature of the electric grinder casing at the end of a single drilling operation. The temperature of the electric grinder casing is at the start of a single drilling operation, t is the drilling duration, and t is a natural number greater than or equal to 1.

3. The drilling process according to claim 2, characterized in that, The steps for determining the corresponding volume of coolant to be added are as follows: If the temperature rise rate of the electric mill casing is greater than the preset second rate, it is preliminarily determined that the interference of the high-pressure equipment on the electric mill exceeds the allowable range, and the drilling roughness is obtained. The borehole roughness is compared with the preset roughness; If the borehole roughness is greater than the preset roughness, a secondary determination is made that the interference of the high-pressure equipment on the electric mill exceeds the allowable range, and the corresponding volume of coolant to be added is determined.

4. The drilling process according to claim 3, characterized in that, The corresponding volume of coolant added is determined by the difference between the preset roughness and the borehole roughness.

5. The drilling process according to claim 4, characterized in that, The step of determining the second corresponding pressure of the drill bit of the electric grinder includes: Obtain the drill bit deformation of the electric grinder; The drill bit deformation of the electric grinder is compared with the preset deformation. If the deformation of the drill bit of the electric grinder is greater than the preset deformation, it is determined that the wear of the drill bit exceeds the allowable range, and the drill bit of the electric grinder drills a hole with a second corresponding pressure.

6. The drilling process according to claim 5, characterized in that, The second corresponding pressure of the drill bit of the electric mill is determined by the difference between the drill bit deformation and the preset deformation.

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