A splitting knife and grinding process

Abstract

This application discloses a splitting knife and grinding process. The grinding process is dry grinding and includes the following workflow: assembling a splitting knife blank in a fixture of a grinding device; adjusting the angle of the grinding wheel according to a preset angle of the splitting knife's conical surface, with the angle between the grinding surface of the grinding wheel and the center axis of the splitting knife blank being equal to the angle between the preset conical surface of the splitting knife and the center axis of the splitting knife; starting the grinding device, rotating the splitting knife blank and the grinding wheel in opposite directions; moving the grinding wheel until it contacts the front edge of the splitting knife blank; calculating and determining a feed speed k and a feed rate X according to target splitting knife specifications; grinding the splitting knife blank according to the determined feed speed k and feed rate X, with the grinding wheel feeding along the center axis of the splitting knife blank; and completing the grinding of the splitting knife's conical surface. The grinding wheel grinds the front end of the splitting knife blank according to the determined feed speed and feed rate, obtaining the preset splitting knife conical surface and improving the dimensional accuracy of the splitting knife. This application can be widely applied in the field of splitting knife grinding technology.

Description

Technical Field

[0001] The present application relates to the field of grinding technology, and in particular to a cleaver and a grinding process. Background Art

[0002] A splitter is an essential consumable in the semiconductor packaging field. In IC packaging, it is primarily used for wire bonding of gold, silver, and alloy wires. Currently, the splitter cone surface is typically ground in a water- or oil-based coolant environment, utilizing the high-speed rotation of a grinding wheel to create friction between the splitter cone and the grinding wheel. This grinding process is highly efficient and low-cost, but it produces a large amount of wastewater splashing during the grinding process, contaminating the fixture. Furthermore, it is impossible to install optical imaging equipment around it, making it impossible to monitor the grinding status and dimensions in real time during the grinding process. Quality control relies solely on multiple, real-time inspections and controls, limiting production efficiency and stability, resulting in poor product precision and stability. Summary of the Invention

[0003] In order to solve at least one of the above technical problems, the present application provides a cleaver and grinding process, and the technical solutions adopted are as follows.

[0004] The splitting knife provided in this application is manufactured by a grinding process.

[0005] The grinding process provided in this application is dry grinding, and the grinding process includes the following workflow:

[0006] Assembling the splitter blank to a fixture of the grinding equipment;

[0007] Adjust the angle of the grinding wheel according to the preset angle of the cone surface of the splitter, so that the angle between the grinding surface of the grinding wheel and the central axis of the splitter blank is equal to the angle between the preset cone surface of the splitter and the central axis of the splitter;

[0008] Start the grinding equipment so that the cleaver blank and the grinding wheel rotate in opposite directions;

[0009] The grinding wheel moves until it contacts the front edge of the riving cutter blank;

[0010] Calculate and determine the feed speed k and feed amount X according to the target specifications of the wedge;

[0011] The grinding wheel grinds the splitting knife blank according to the determined feed speed k and feed amount X, and the grinding wheel feeds along the central axis of the splitting knife blank;

[0012] Complete the grinding of the wedge cone surface.

[0013] In certain embodiments of the present application, the process of determining the feed speed k includes:

[0014] A sample of a splitter blank is ground on the machine, and the feed speed of the grinding wheel is set to k试 When the center of the experimental end face deviates, stop grinding and record the current feed amount as X 试 , and calculate the corresponding grinding amount Y 试 ;

[0015] Set the feed rate change value to X △试 , and X 试-△ =X 试 -X △试 , calculate the set feed amount to X 试-△ Grinding amount Y 试-△ ;

[0016] Calculate from feed position X 试-△ To feed position X 试 The grinding amount is Y △试 =Y 试 -Y 试-△ , the feed time is t △试 =X △试 / k 试 , and the grinding efficiency is calculated as M △试 =Y △试 / t △试 ;

[0017] Calculate from feed position X 试-△ To feed position X 试 The feed rate is k △试 =X △试 / t △试 =X △试 / (Y △试 / M △试 )=(X △试 / (Y 试 -Y 试-△ ))*M △试 ;

[0018] The feed speed of the grinding wheel during grinding is obtained as k=e*k △试 , e is a coefficient greater than zero.

[0019] In some embodiments of the present application, the feed rate change value X is set. △试 As the limit value, the grinding efficiency M is calculated △试 =M max , the feed speed k that the grinding wheel can achieve at different positions of the sample of the splitter blank △试 =k max , and the feed speed k=e*k during grinding max .

[0020] In some embodiments of the present application, the feed rate change value X is set. △试 =1μm.

[0021] In some embodiments of the present application, it is assumed that 0<e≤1.

[0022] In certain embodiments of the present application, it is set that 0.3≤e≤0.7.

[0023] In certain embodiments of the present application, the rotation speed of the riving knife is 500 to 1000 r / min.

[0024] In certain embodiments of the present application, the rotation speed of the grinding wheel is 3000 to 3500 r / min.

[0025] In certain embodiments of the present application, when the grinding wheel moves to contact the front end edge of the cleaver blank, the grinding surface of the grinding wheel is located at the central axis of the cleaver blank or exceeds the central axis of the cleaver blank.

[0026] The embodiments of the present application have at least the following beneficial effects: the grinding process designed in the present application is dry grinding, and the grinding wheel feed speed curve and feed rate are determined through experimental calculation of the target specifications of the cleaver. The grinding wheel grinds the front end of the cleaver blank according to the determined feed speed and feed rate. By coordinating the grinding process and the grinding equipment, the processing dimensions are strictly controlled, and the predetermined cleaver cone surface can be obtained to meet the packaging requirements. This improves the dimensional accuracy of the cleaver, while also increasing processing efficiency and enabling mass production. The present application can be widely applied in the field of cleaver grinding technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The aspects and advantages described and / or attached in the embodiments of the present application will become apparent and easily understood in conjunction with the following drawings. It should be noted that the embodiments embodied in the following drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0028] Figure 1 This is a schematic diagram of the structure when the splitting tool blank is assembled in the fixture.

[0029] Figure 2 Schematic diagram of the structure after the grinding wheel angle is adjusted.

[0030] Figure 3 Schematic diagram of the structure in which the grinding surface of the grinding wheel contacts the front edge of the splitter blank.

[0031] Figure 4 This is a structural diagram of the wedge cutter blank after the grinding wheel grinds the preset cone surface. Point E is the position on the grinding wheel grinding surface close to the front end of the wedge cutter, and point E' is the position on the grinding wheel grinding surface close to the junction of the wedge cutter cone surface and the cylinder.

[0032] Figure 5 Schematic diagram comparing the structures of the cleaver blank and the cleaver obtained by grinding.

[0033] Figure 6 From the feed position X 试-△ To feed position X 试 Schematic diagram of the shape change of the splitter blank.

[0034] Figure 7 k = k max ; k = 0.7*k max ; k = 0.3*k max Three feed speed change curves. DETAILED DESCRIPTION

[0035] The following combination Figures 1 to 7 Embodiments of the present application are described in detail, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and are not to be construed as limiting the present application.

[0036] In the description of this application, it should be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "multiple" means two or more.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0038] The present application relates to a splitting knife, which is manufactured by a predetermined grinding process. Specifically, the front end of a splitting knife blank is ground by a grinding wheel to form a conical surface at the front end of the splitting knife blank to obtain the splitting knife.

[0039] The cleaver blank is formed by light-curing 3D printing.

[0040] Combined with attachment Figure 5 , establish a rectangular coordinate system with the center point of the front end surface of the splitting knife blank as the origin O and the central axis of the splitting knife blank as the X-axis.

[0041] Furthermore, the chopper blank is in the shape of a round rod, the radius of the chopper blank is r, the radius of the front end face of the preset ground chopper is R, and 2R=T, T is the diameter of the front end face of the chopper, the cone angle of the front end of the chopper is N, the projection length of the cone surface of the chopper on the X-axis is h, and h is the height of the cone formed by the cone surface of the chopper at the front end.

[0042] It should be noted that the feed rate of the grinding wheel during the grinding process is X, and X=h, so the grinding amount Y of the wedge cutter at different feed rates during the grinding process can be obtained.

[0043] Combined with attachment Figure 5 In a cross-sectional view along the centerline axis of the cleaver blank, the front end of the cleaver blank has two vertices, B and B', and the rear end has two vertices, D and D'. The conical surface formed by grinding the cleaver forms two vertices, A and A', on the front end face of the cleaver, and two vertices, C and C', on the side surface near the front end of the cleaver.

[0044] It is understandable that the grinding wheel is O Position feed to X C Position, then the grinding is completed, and the grinding amount of the wedge is the difference between the volume of the cylinder formed by BCC'B' and the volume of the truncated cone formed by ACC'A'.

[0045] Combined with attachment Figure 5 , with the coordinate system XOY as a reference, the volume obtained by rotating the shaded area around the X-axis is the part of the front end of the splitting tool blank that is ground, that is, the grinding amount Y to be ground at the front end of the splitting tool blank. Further, according to the preset shape of the splitting tool and the various dimensional parameters of the splitting tool, the grinding amount Y = V can be calculated. 圆柱 -V 圆台 =πr 2 h-πh(r 2 +R 2 + rR) / 3=πh(2r 2 -R 2 -rR) / 3.

[0046] Combined with attachment Figure 5 , it should be noted that:

[0047] r = OB;

[0048] h=BC=X C ;

[0049] R=AA' / 2=OA=OB-BA=OB-BC*tan(N / 2)=OB-X C *tan(N / 2); Therefore, from X O Position feed to X C Grinding amount at position Y C =πh(2r 2 -R 2 -rR) / 3=πX C (2(OB / 2) 2 -(OB-X C *tan(N / 2)) 2 -OB*(OB-X C *tan(N / 2)) / 2) / 3.

[0050] Other components and operations of the splitting knife are well known in the relevant art to those skilled in the art and will not be described in detail here. The grinding process will be introduced below.

[0051] This application relates to a grinding process for grinding a cleaver blank into a cleaver according to a predetermined grinding process. During the grinding process, the grinding surface of the grinding wheel forms a predetermined angle with the central axis of the cleaver blank. The grinding wheel moves along a predetermined feed direction, grinding the cleaver blank into the cleaver, and completing the grinding of the conical surface. The grinding process designed in this application can strictly control the cleaver size, improve processing efficiency, and the resulting cleaver has high dimensional accuracy and good flexural strength, which can well meet the requirements of packaging use.

[0052] The grinding process is dry grinding, and the grinding process includes the following work flow.

[0053] Combined with attachment Figure 1 , assemble the chopper blank into the fixture of the grinding equipment, the fixture is rotatable, and the rear end of the chopper blank is inserted into the chuck of the fixture and fixed.

[0054] Combined with attachment Figure 2 The angle of the grinding wheel is adjusted according to the preset angle of the cone surface of the splitter. The angle between the grinding surface of the grinding wheel and the central axis of the splitter blank is equal to the angle between the preset cone surface of the splitter and the central axis of the splitter. The angle between the grinding surface of the grinding wheel and the central axis of the splitter blank is N / 2.

[0055] Start the grinding equipment, the motor drives the fixture to rotate, the fixture drives the splitter blank to rotate, and starts the grinding wheel to rotate, and the rotation directions of the splitter blank and the grinding wheel are opposite.

[0056] Combined with attachment Figure 3 The grinding wheel moves to contact the front edge of the splitting knife blank, and the movement of the grinding wheel is assisted by a visual imaging device, and the position of the center of the front end of the splitting knife blank at this time is recorded as the position of the origin O.

[0057] The grinding wheel grinds the cleaver blank according to the determined feed speed k and feed amount X, and the grinding wheel feeds along the central axis of the cleaver blank.

[0058] Complete the grinding of the wedge cone surface.

[0059] It should be noted that, considering that each specification of splitter is made of different materials and has different sizes, before production, a sample of a splitter blank is used to calculate the feed speed k during grinding of the grinding wheel for batch processing. The specific determination process is as follows.

[0060] A sample of a splitter blank is ground on the machine, and the feed speed of the grinding wheel is set to k 试 When the center of the experimental end face deviates, stop grinding and record the current feed amount as X 试 , and calculate the corresponding grinding amount Y 试 Among them, a visual imaging device is used to assist in checking the grinding condition of the sample.

[0061] Combined with attachment Figure 6 , set the feed rate change value to X △试 , and X 试-△ =X 试 -X △试 , calculate the set feed amount to X 试-△ Grinding amount Y 试-△ .

[0062] Calculate from feed position X 试-△ To feed position X 试 The grinding amount is Y △试 =Y 试 -Y 试-△ , the feed time is t △试 =X △试 / k 试 , and the grinding efficiency is calculated as M △试 =Y △试 / t △试 .

[0063] Calculate from feed position X 试-△ To feed position X 试 The feed rate is k △试 =X △试 / t △试 =X △试 / (Y △试 / M △试 )=(X △试 / (Y 试 -Y 试-△ ))*M △试 .

[0064] The feed rate of the grinding wheel during grinding is k=e*k△试 , e is a coefficient greater than zero.

[0065] in,

[0066] Y 试 =πX 试 (2(OB / 2) 2 -(OB-X 试 tan(N / 2)) 2 -OB*(OB-X 试 tan(N / 2)) / 2) / 3.

[0067] Y 试-△ =πX 试-△ (2(N / 2) 2 -(OB-X 试-△ tan(N / 2)) 2 -OB*(OB-X 试-△ tan(N / 2)) / 2) / 3.

[0068] It should be noted that during the grinding process, as the grinding wheel is fed, the grinding amount per unit feed gradually increases as the feed rate increases.

[0069] Furthermore, set the feed rate change value X △试 is the limit value, and the grinding efficiency obtained by calculation is the limit grinding efficiency, M △试 =M max The maximum feed speed k that the grinding wheel can achieve at different positions of the sample of the splitter blank △试 =k max , and the feed speed k=e*k during grinding max .

[0070] Specifically, set the feed amount change value X △试 =1μm.

[0071] During the grinding process, the grinding wheel's grinding performance gradually decreases due to the gradual shedding of abrasive grains and the clogging of chips. On the other hand, the heat generated during the grinding process causes the binder to soften and decompose, resulting in a decrease in the adhesion of the grinding wheel to the abrasive and a decrease in grinding force.

[0072] If the grinding wheel is fed at the limit feed speed k max Grinding: As grinding time accumulates, the grinding wheel that has been worn to a certain extent will have a reduced grinding force. At a faster feed rate, the processing residue will accumulate and increase, resulting in increased grinding pressure during the grinding process. This can easily lead to insufficient clamping force of the fixture, which in turn leads to dimensional deviation of the splitter processing. At the same time, dry grinding is very likely to cause burns on the splitter surface, affecting product quality. The grinding force needs to be strictly controlled, so the actual feed rate of the grinding wheel should not exceed kmax .

[0073] However, the actual grinding wheel feed rate k cannot be too low, otherwise the grinding time will increase. The grinding time of the grinding wheel will affect the surface quality of the splitter. Excessive grinding time will increase the surface roughness of the splitter, affecting its appearance and performance. Furthermore, as the surface roughness increases, the splitter's flexural strength decreases significantly. Furthermore, during the grinding process, the splitter is subjected to friction and cutting forces from the grinding wheel, generating heat. If the feed rate is too slow or the grinding time is too long, the heat-affected zone will expand, affecting the performance of the splitter. It may also reduce the dimensional and shape accuracy of the splitter, affecting its appearance and performance. Therefore, the grinding process has strict requirements on the grinding wheel feed rate.

[0074] In some embodiments, 0<e≤1. Further, 0.3≤e≤0.7 is set.

[0075] It should be noted that, based on the specifications of the wedge cutter, the cone angle at the front end of the wedge cutter is preset to N, and the grinding wheel feed rate is calculated as X = (rR) / tan(N / 2). Further, X = (OB-BA) / tan(N / 2).

[0076] It is understood that after the feed rate is calculated based on the sample of the splitting blade blank, the splitting blade blank can be assembled into a fixture of a grinding device and the splitting blade blank can be processed according to the determined grinding parameters.

[0077] It should be noted that when the grinding wheel moves to contact the front end edge of the cleaver blank, the grinding surface of the grinding wheel is at the central axis of the cleaver blank or exceeds the central axis of the cleaver blank.

[0078] Combined with attachment Figure 4 During the grinding process, the grinding wheel is fed along the X-axis. The wear rate at point E' on the grinding surface of the grinding wheel is greater than that at point E' on the grinding surface. This causes the grinding wheel to grind faster at point E', which is closer to the fixture clamping point. During the grinding process, as processing time accumulates, the processing residue at point E' is greater than that at point E, causing the main force on the splitter and fixture to be concentrated at point E'. Compared to the grinding wheel feeding along the Y-axis, the grinding wheel feeding along the X-axis in this application can reduce the lever force on the fixture, allowing the fixture to provide greater support for the splitter blank so that the splitter blank can withstand greater grinding pressure, improving grinding efficiency, preventing the fixture from shifting due to force, and improving the dimensional accuracy of the splitter.

[0079] On the other hand, combined with Figure 4Point E' is near the intersection of the blade's conical surface and cylindrical body. Point E is also near the blade's tip, a crucial component in practical applications. It performs the crucial semiconductor packaging and welding functions, making direct contact with the semiconductor chip and subjecting it to significant forces. The closer to point E, the smaller the cross-sectional diameter of the blade's conical surface, and the worse its resistance to bending. Therefore, the design of this application uses a grinding wheel fed along the X-axis to grind the blade blank, preserving the dimensional accuracy of the blade's conical surface and reducing the risk of breakage.

[0080] In some embodiments, the blade rotates at a speed of 500 to 1000 rpm. If the blade rotates at a speed lower than 500 rpm, the blade's tapered surface may be non-circular or polygonal. If the blade rotates at a speed higher than 1000 rpm, the fixture holding the blade may vibrate, affecting grinding stability.

[0081] In some embodiments, the grinding wheel rotates at a speed of 3000 to 3500 rpm. If the grinding wheel rotates at a speed lower than 3000 rpm, low grinding efficiency may occur. If the grinding wheel rotates at a speed higher than 3500 rpm, the grinding wheel may vibrate, causing the contour of the wedge cone to be non-circular or to form a polygon.

[0082] As an implementation, the visual imaging device utilizes a high-magnification camera unit. The visual imaging device, in conjunction with the grinding wheel and fixture, monitors the grinding process in real time, strictly controls processing dimensions, improves processing efficiency, and enables mass production. The resulting choppers have high dimensional accuracy and excellent flexural strength, meeting packaging requirements.

[0083] The contents of this application are described in detail below in conjunction with specific embodiments. It should be noted that the following description is only for illustrative purposes and is not a specific limitation to this application.

[0084] A splitting tool blank is ground into a splitting tool product of certain specifications, wherein the outer diameter of the splitting tool is r=1.583 mm, the cone angle is N=20°, and R=60 μm.

[0085] The steps of the grinding process are as follows.

[0086] Step S1: inserting a splitter blank into a fixture of a grinding device.

[0087] Step S2: adjusting and fixing the grinding wheel angle, wherein the grinding wheel angle is the angle between the grinding surface of the grinding wheel and the central axis of the wrecking cutter, and the angle is 10°.

[0088] In step S3, the splitting knife rotates at a speed of 500 to 1000 r / min.

[0089] In step S4, the grinding wheel rotates at a speed of 3000 to 3500 r / min, and the grinding wheel and the wedge rotate in opposite directions.

[0090] Step S5: Move the grinding wheel to a position in contact with the front edge of the splitting blade blank, so that the grinding surface of the grinding wheel intersects the central axis of the splitting blade blank, and record the center position of the front end of the splitting blade blank as the origin O.

[0091] Step S6, a sample of a splitter blank is put on the machine for grinding, and the feed speed is k 试 =1mm / s, start grinding, when the center of the front end of the splitter blank begins to deviate, stop grinding, and record the feed rate X at the current position 试 =2.3mm; set unit feed amount X △试 =1μm, according to the grinding volume formula, the unit feed amount X is calculated at the position of 2.3mm. △试 The grinding amount is Y △试 =0.001498mm 3 , so that the maximum grinding efficiency of the grinding process is M max =1.498mm 3 / s.

[0092] Step S7, determine the limit feed rate curve that can be achieved at different positions, combined with the attached Figure 7 In the figure, the X axis represents the feed rate, the Y axis represents the feed speed, and the three curves from top to bottom are: k = k max ; k = 0.7*k max ; k = 0.3*k max .

[0093] Step S8, setting the feed speed of the grinding wheel during grinding.

[0094] Step S9: The grinding wheel is fed along the X-axis direction, and the feed amount is set to 4.149 mm. When the feed amount is 4.149 mm, the T value of the wedge is the set size.

[0095] Step S10: Load the splitter blank into a fixture of a grinding device, and complete the grinding of the conical surface according to the set grinding parameters.

[0096] The wedge obtained through the above grinding steps has a conical surface grinding size of ±3μm, a precision qualification rate of ≥99%, a bending resistance of ≥500g, and an average surface roughness Ra of no more than 0.3μm.

[0097] Furthermore, we compared the results of different grinding processes using different parameters. We ground 1,000 blades for each process, conducted a full T-value dimensional inspection, and evaluated the pass rate. We also randomly inspected 100 blades for both flexural strength and surface roughness, evaluating the average values. The comparison results are shown in the table below.

[0098]

[0099]

[0100] According to the comparison, when the feed speed is too fast, the machining residue accumulates and increases, which leads to increased grinding pressure during the grinding process. This can easily lead to insufficient clamping force of the fixture, resulting in dimensional deviation of the wedge processing. When the feed speed is too slow, the grinding time is too long, resulting in high surface roughness.

[0101] In the description of this specification, if the reference terms "one embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" appear, it means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0102] The above describes the implementation methods of the present application in detail in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present application.

[0103] In the description of this application, if the "," appears in the patent title, it indicates an "and" relationship, not an "or" relationship. For example, if the patent title is "A, B", it means that the content protected by this application is: the technical solution of the subject name A and the technical solution of the subject name B.

Claims

1. A grinding process, characterized in that: The grinding process is dry grinding, and the grinding process includes: Assembling the splitter blank to a fixture of the grinding equipment; Adjust the angle of the grinding wheel according to the preset angle of the cone surface of the splitter, so that the angle between the grinding surface of the grinding wheel and the central axis of the splitter blank is equal to the angle between the preset cone surface of the splitter and the central axis of the splitter; Start the grinding equipment so that the cleaver blank and the grinding wheel rotate in opposite directions; The grinding wheel moves until it contacts the front edge of the riving cutter blank; Calculate and determine the grinding wheel feed speed k and feed rate X based on the target specifications of the wedge; The grinding wheel grinds the splitting knife blank according to the determined feed speed k and feed amount X, and the grinding wheel feeds along the central axis of the splitting knife blank; Complete the grinding of the wedge cone surface; The process of determining the feed speed k includes: A sample of a splitter blank is ground on the machine, and the feed speed of the grinding wheel is set to k 试 When the center of the experimental end face deviates, stop grinding and record the current feed amount as X 试 , and calculate the corresponding grinding amount Y 试 ; Set the feed rate change value to X △试 , and X 试-△ =X 试 -X △试 , calculate the set feed amount to X 试-△ Grinding amount Y 试-△ ; Calculate from feed position X 试-△ To feed position X 试 The grinding amount is Y △试 =Y 试 -Y 试-△ , the feed time is t △试 =X △试 / k 试 , and the grinding efficiency is M △试 =Y △试 / t △试 ; Calculate from feed position X 试-△ To feed position X 试 The feed rate is k △试 =X △试 / t △试 =X △试 / (Y △试 / M △试 ) = (X △试 / (Y 试 -Y 试-△ ))*M △试 ; The feed rate of the grinding wheel during grinding is k=e*k △试 , e is a coefficient greater than zero, where 0<e≤1 is set; Set the feed rate change value X △试 As the limit value, the grinding efficiency M is calculated △试 =M max , the feed speed k that the grinding wheel can achieve at different positions of the sample of the splitter blank △试 =k max , and the feed speed of the grinding wheel during grinding k=e*k max .

2. The grinding process according to claim 1, wherein: Set the feed rate change value X △试 =1μm.

3. The grinding process according to claim 1, wherein: Set 0.3≤e≤0.

7.

4. The grinding process according to claim 1 or 2, characterized in that: The speed of the riving knife is 500 to 1000 r / min.

5. The grinding process according to claim 1 or 2, characterized in that: The rotation speed of the grinding wheel is 3000 to 3500 r / min.

6. The grinding process according to claim 1 or 2, characterized in that: When the grinding wheel moves to contact the front end edge of the cleaver blank, the grinding surface of the grinding wheel is at the central axis of the cleaver blank or crosses the central axis of the cleaver blank.

7. A riving knife, characterized by: The cleaver is manufactured by the grinding process according to any one of claims 1 to 6.

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