Shell grinding jig for double-sided grinding and parameter determination method

Abstract

The invention provides a shell grinding jig for double-sided grinding and a parameter determining method, and relates to the field of grinding jigs. The method comprises the steps that a target depth parameter of a shell to be ground, a target toughness value and shape and size parameters of a shell grinding jig and material parameters of an interlayer are obtained; according to the target depth parameter of the shell to be ground, the total thickness of the shell grinding jig is determined; according to the target toughness value and the shape and size parameters of the shell grinding jig and the material parameters of the clamping pieces, the target interlayer thickness of the interlayer is determined; and according to the target interlayer thickness of the interlayer, the total thickness of the shell grinding jig and a first preset parameter, a first thickness parameter of a first tungsten steel layer and a second thickness parameter of a second tungsten steel layer are determined correspondingly. According to the scheme, the toughness of the grinding jig for the tungsten steel material is improved, the situation that the grinding jig for the tungsten steel material is broken after falling is prevented, the service life of the grinding jig is prolonged, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of grinding fixtures, and in particular to a double-sided grinding fixture with a housing and a method for determining its parameters. Background Technology

[0002] Currently, the surface of battery casings is ground using grinding jigs made of tungsten carbide, a material known for its wear resistance and high hardness. However, during normal use, tungsten carbide is brittle and frequently breaks due to falling, rendering it unusable. Furthermore, tungsten carbide products are expensive, significantly increasing processing costs. Therefore, there is an urgent need to develop a grinding jig that possesses high toughness without altering the tungsten carbide material used in the grinding jig. This would solve the problems of low toughness and easy breakage of existing grinding jigs, thereby increasing their service life and reducing production costs. Summary of the Invention

[0003] This invention provides a double-sided grinding fixture with a shell and a method for determining parameters, which solves the problems of low toughness and easy breakage of existing grinding fixtures made of tungsten steel.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: This invention provides a method for determining the parameters of a double-sided grinding housing fixture. The double-sided grinding housing fixture includes: a first tungsten carbide layer, a second tungsten carbide layer, and an interlayer disposed between the first and second tungsten carbide layers. The two end faces of the interlayer are respectively fixedly connected to the first and second tungsten carbide layers. The method includes: Obtain the target depth parameters of the shell to be ground, the target toughness value of the shell grinding fixture, the shape and size parameters, and the material parameters of the interlayer; Determine the total thickness of the shell grinding fixture based on the target depth parameters of the shell to be ground; The target sandwich thickness is determined based on the target toughness value, shape and size parameters of the shell grinding fixture, and the material parameters of the clamping pieces. Based on the target thickness of the interlayer, the total thickness of the shell grinding fixture, and the first preset parameters, the first thickness parameter of the first tungsten steel layer and the second thickness parameter of the second tungsten steel layer are determined respectively.

[0005] Optionally, the target toughness value is determined in the following manner: Obtain the current environmental operating parameters of the housing grinding fixture; Based on the current environmental operating parameters of the housing grinding fixture, using the formula... Determine the target toughness value of the current shell grinding fixture. ; Where h is the maximum drop height of the shell grinding fixture during operation, in meters; m is the estimated weight of the shell grinding fixture, in kilograms; This is the stiffness coefficient corresponding to the ground material; The second preset parameter is set to 0.8; For safety, we set it to 1.2.

[0006] Optionally, the target sandwich thickness is determined based on the target toughness value, shape and size parameters of the housing grinding fixture, and the material parameters of the sandwich layer, including: The effective area of ​​the connection end face between the interlayer and the first tungsten carbide layer is determined based on the shape and size parameters of the housing grinding fixture. Based on the target toughness value of the shell grinding fixture, the effective area of ​​the interlayer, and the material parameters of the interlayer, the formula is used... Determine the initial thickness of the interlayer ; in, The yield strength is a material parameter of the interlayer. Elongation is a material parameter of the sandwich layer. The effective area of ​​the mezzanine; The target toughness value; The third preset parameter is set to 0.8; The energy absorption capacity of the interlayer material during the impact process is taken as 0.6 to 0.9; The target thickness of the interlayer is determined based on the initial thickness of the interlayer and the maximum grinding pressure exerted on the shell grinding fixture.

[0007] Optionally, the target sandwich thickness is determined based on the initial thickness of the sandwich layer and the maximum grinding pressure of the shell grinding fixture, including: Based on the maximum grinding pressure of the housing grinding fixture, using the formula... This is to determine the minimum thickness parameter of the interlayer to satisfy the bending stiffness under maximum grinding pressure. ;in, The maximum grinding pressure is L; the stress span of the interlayer is L. The yield strength is a material parameter of the interlayer. The target interlayer thickness is determined based on the initial and minimum thickness parameters of the interlayer.

[0008] Optionally, based on the target thickness of the interlayer, the total thickness of the housing grinding fixture, and the first preset parameter, the first thickness parameter of the first tungsten carbide layer and the second thickness parameter of the second tungsten carbide layer are determined, including: The first thickness parameter of the first tungsten carbide layer is determined based on the target interlayer thickness, the total thickness of the shell grinding fixture, and the first preset parameter. Based on the first thickness parameter of the first tungsten steel layer, using the formula Determine the second thickness parameter of the second tungsten carbide layer. ;in, The first preset parameter has a value range of 0.5 to 0.65; The total thickness of the housing grinding fixture; The target thickness of the interlayer is given.

[0009] Optionally, the first thickness parameter of the first tungsten carbide layer is determined based on the target interlayer thickness, the total thickness of the housing grinding fixture, and the first preset parameter, including: Based on the target interlayer thickness, the total thickness of the housing grinding fixture, and the first preset parameters, the formula is used... Determine the first thickness parameter ;in, The first preset parameter has a value range of 0.5 to 0.65; The total thickness of the housing grinding fixture; The target thickness of the interlayer is given.

[0010] Optionally, the four corners of the double-sided grinding fixture are each provided with a chamfer at a preset angle, and the chamfer parameters at the preset angle are determined in the following way: The first range of chamfering parameters is determined based on the shape and size parameters of the housing grinding fixture and the total thickness of the housing grinding fixture; Based on the first range, through the formula Determine the chamfer parameters; among which, The fracture toughness of tungsten carbide; This represents the fatigue limit of tungsten carbide. This is the geometric correction factor, ranging from 1.2 to 1.5.

[0011] The present invention also provides a double-sided grinding housing grinding fixture, comprising: A first tungsten carbide layer, a second tungsten carbide layer, and an interlayer disposed between the first tungsten carbide layer and the second tungsten carbide layer, wherein the two end faces of the interlayer are fixedly connected to the first tungsten carbide grinding disc and the second tungsten carbide grinding disc, respectively. The parameters of the first tungsten carbide layer, the second tungsten carbide layer, and the interlayer are determined in the following manner: Obtain the target depth parameters of the shell to be ground, the target toughness value of the shell grinding fixture, the shape and size parameters, and the material parameters of the interlayer; Determine the total thickness of the shell grinding fixture based on the target depth parameters of the shell to be ground; The target sandwich thickness is determined based on the target toughness value, shape and size parameters of the shell grinding fixture, and the material parameters of the clamping pieces. Based on the target thickness of the interlayer, the total thickness of the shell grinding fixture, and the first preset parameters, the first thickness parameter of the first tungsten steel layer and the second thickness parameter of the second tungsten steel layer are determined respectively.

[0012] Optionally, the four corners of the first tungsten steel layer, the second tungsten steel layer, and the interlayer are all provided with chamfers of a preset angle.

[0013] Optionally, the chamfer parameters of the preset angle are determined in the following way: The first range of chamfering parameters is determined based on the shape and size parameters of the housing grinding fixture and the total thickness of the housing grinding fixture; Based on the first range, through the formula Determine the chamfer parameters; among which, The fracture toughness of tungsten carbide; This represents the fatigue limit of tungsten carbide. This is the geometric correction factor, ranging from 1.2 to 1.5.

[0014] The above-described solution of the present invention has at least the following beneficial effects: The double-sided grinding fixture for a housing of the present invention includes: a first tungsten carbide layer, a second tungsten carbide layer, and an interlayer disposed between the first and second tungsten carbide layers. The two end faces of the interlayer are fixedly connected to the first and second tungsten carbide layers, respectively. The method includes: obtaining the target depth parameter of the housing to be ground, the target toughness value of the grinding fixture, the shape and size parameters, and the material parameters of the interlayer; determining the total thickness of the grinding fixture based on the target depth parameter of the housing to be ground; determining the target interlayer thickness based on the target toughness value, shape and size parameters, and the material parameters of the interlayer; and determining the first thickness parameter of the first tungsten carbide layer and the second thickness parameter of the second tungsten carbide layer based on the target interlayer thickness, the total thickness of the grinding fixture, and a first preset parameter. This improves the toughness of the tungsten carbide grinding fixture, prevents breakage after the tungsten carbide grinding fixture falls off, increases the service life of the grinding fixture, and reduces production costs. Attached Figure Description

[0015] Figure 1 This is a flowchart illustrating the method for determining the parameters of the double-sided grinding housing grinding fixture of the present invention; Figure 2 This is a perspective view of the double-sided grinding housing grinding fixture of the present invention; Figure 3 This is a structural schematic diagram of the double-sided grinding housing grinding fixture of the present invention in use; Figure 4 This is a perspective view of the housing to be ground placed within the inner frame of the grinding fixture according to the present invention; Explanation of reference numerals in the attached figures: 11. First tungsten carbide layer; 12. Second tungsten carbide layer; 13. Interlayer; 2. Fixing fixture; 3. Shell to be ground. Detailed Implementation

[0016] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0017] like Figures 1 to 4 As shown, an embodiment of the present invention proposes a method for determining the parameters of a double-sided grinding housing grinding fixture. The double-sided grinding housing grinding fixture includes: a first tungsten carbide layer 11, a second tungsten carbide layer 12, and an interlayer 13 disposed between the first tungsten carbide layer 11 and the second tungsten carbide layer 12. The two end faces of the interlayer 13 are fixedly connected to the first tungsten carbide layer 11 and the second tungsten carbide layer 12, respectively. The method includes: Step 101: Obtain the target depth parameters of the shell 3 to be ground, the target toughness value of the shell grinding fixture, the shape and size parameters, and the material parameters of the interlayer 13; Step 102: Determine the total thickness of the shell grinding fixture based on the target depth parameters of the shell 3 to be ground; Step 103: Determine the target interlayer thickness of the interlayer 13 based on the target toughness value, shape and size parameters of the housing grinding fixture and the material parameters of the clamping piece 13. Step 104: Based on the target interlayer thickness of the interlayer 13, the total thickness of the shell grinding fixture, and the first preset parameters, determine the first thickness parameter of the first tungsten steel layer 11 and the second thickness parameter of the second tungsten steel layer 12.

[0018] In this embodiment, the double-sided grinding fixture for the battery casing can be used to fix the battery casing during the grinding process. Both end faces of the interlayer 13 can be bonded to the first tungsten steel layer 11 and the second tungsten steel layer 12 respectively using strong adhesive. The first tungsten steel layer 11, the second tungsten steel layer 12, and the interlayer 13 are all frame structures, i.e., they have a hollow inner frame area. In use, they can be used in conjunction with the fixing fixture 2. The specific usage process is as follows: First, place the frame of the casing 3 to be ground inside the inner frame of the double-sided grinding fixture for the battery casing, and then place the fixing fixture 2 into the inner frame of the casing grinding fixture. The inner frame is clamped to fix the shell 3 to be ground. Then, the fixed double-sided grinding shell grinding fixture is placed into the mounting slot of the grinding jig for fixation. The part protruding from the total thickness of the shell grinding fixture (double-sided grinding shell grinding fixture) is ground by the grinding equipment until it reaches the same as the total thickness of the shell grinding fixture. In this embodiment, the target depth parameter of the shell 3 to be ground refers to the target depth of the frame to be ground after grinding. The initial actual depth of the frame to be ground of the shell 3 to be ground is greater than the target depth. The target depth is reached after grinding. In this embodiment, the fixing fixture 2 is mainly used to fix the edge of the shell to be ground 3 after it is placed in the inner frame of the shell grinding fixture. Therefore, the structure of the fixing fixture 2 only needs to match the inner frame structure of the shell grinding fixture, and the side length needs to be equal to the side length of the inner frame minus the thickness of the edge of the shell to be ground 3. In this embodiment, the material of the interlayer 13 can be selected according to requirements, but the following conditions must be met: firstly, the toughness value must be greater than that of tungsten steel; secondly, the weight of the same volume must be less than that of tungsten steel, i.e., the density must be less than that of tungsten steel. In a preferred embodiment, the interlayer 13 is made of stainless steel or titanium alloy.

[0019] In this embodiment, the method for determining the parameters of the double-sided grinding housing grinding fixture improves the overall toughness of the double-sided grinding housing grinding fixture by setting a material with a toughness value greater than that of tungsten steel and a density less than that of tungsten steel between the first tungsten steel layer 11 and the second tungsten steel layer 12. At the same time, it reduces the weight of the double-sided grinding housing grinding fixture, thereby reducing the impact force when the double-sided grinding housing grinding fixture is dropped, preventing the tungsten steel material grinding fixture from breaking after falling, increasing the service life of the grinding fixture, and reducing production costs.

[0020] In an optional embodiment of the present invention, the target toughness value in step 101 is determined in the following manner: Step 1011: Obtain the current environmental operating parameters of the housing grinding fixture; Step 1012: Based on the current environmental operating parameters of the housing grinding fixture, use the formula... Determine the target toughness value of the current shell grinding fixture. ; Where h is the maximum drop height of the shell grinding fixture during operation, in meters; m is the estimated weight of the shell grinding fixture, in kilograms; This is the stiffness coefficient corresponding to the ground material; The second preset parameter is set to 0.8; For safety, we set it to 1.2.

[0021] In this embodiment, g is the acceleration due to gravity, taken as 9.8; the maximum fall height of the shell grinding fixture during operation can be determined according to requirements, or according to the daily workbench height of the shell grinding fixture. For example, when the workbench height is 1.1 meters, h is taken as 1.1; the estimated weight of the shell grinding fixture can be estimated based on the weight of commonly used shell grinding fixtures; for example, the weight of a commonly used shell grinding fixture is 0.6 kg, so the estimated weight of the shell grinding fixture can be estimated as a value less than 0.6, for example, estimated as 0.4; the stiffness coefficient corresponding to the ground material can be determined according to the current environmental conditions of the shell grinding fixture. When the ground type is rigid cement ground, it is taken as 0.85-0.95; when the ground type is... When the surface type is concrete, a value of 0.75-0.85 can be used; when the surface type is epoxy resin, a value of 0.60-0.75 can be used; when the surface type is rubber / pad surface, a value of 0.40-0.60 can be used. In this embodiment, the target toughness value can also be directly determined by empirical values. For example, for a standard workbench fixture with a height of 1.1 meters, a cement surface, and an estimated weight of 0.4 to 0.6, the target toughness value can be directly determined to be between 2.0 and 3.5. At the same time, the target toughness value can also be adjusted in real time according to specific implementation data during actual use. When the target parameter cannot meet the requirements based on the current target toughness value, the target toughness value can be increased or decreased, thereby redetermining the corresponding target parameter.

[0022] In an optional embodiment of the present invention, step 102, determining the total thickness of the shell grinding fixture based on the target depth parameter of the shell 3 to be ground, may include: using the target depth parameter to be processed to the shell 3 as the total thickness of the shell grinding fixture; for example, when the actual height of the frame of the shell 3 to be ground is 1.3cm and the grinding height is 0.3cm, the target depth parameter to be processed is 1.0cm, and the target depth parameter of 1.0cm is determined as the total thickness of the shell grinding fixture; during processing, the shell 3 to be ground is fixed inside the shell grinding fixture, that is, the shell grinding fixture is sleeved on the outside of the shell 3 to be ground. At this time, the part exceeding the shell grinding fixture by 0.3cm is the amount of grinding required. When the shell 3 to be ground is ground to 1.0cm, since the height of the shell grinding fixture is the same as the height of the shell 3 to be ground, it can contact the grinding equipment, thereby preventing the shell 3 to be ground from exceeding the target depth.

[0023] In an optional embodiment of the present invention, step 103, determining the target interlayer thickness of the interlayer 13 based on the target toughness value, shape and size parameters of the housing grinding fixture, and the material parameters of the interlayer 13, may include: Step 1031: Determine the effective area of ​​the connection end face between the interlayer 13 and the first tungsten carbide layer 11 based on the shape and size parameters of the housing grinding fixture; Step 1032: Based on the target toughness value of the shell grinding fixture, the effective area of ​​the interlayer 13, and the material parameters of the interlayer 13, the formula is used to... Determine the initial thickness of interlayer 13 ; in, The yield strength is a material parameter of interlayer 13. Elongation is the material parameter of interlayer 13. The effective area of ​​mezzanine 13; The target toughness value; The third preset parameter is set to 0.8; The energy absorption capacity of the material in interlayer 13 during the impact process is taken as 0.6 to 0.9; Step 1033: Determine the target interlayer thickness of interlayer 13 based on the initial thickness of interlayer 13 and the maximum grinding pressure on the shell grinding fixture.

[0024] In this embodiment, the end face of the interlayer 13 completely coincides with the end face of the first tungsten carbide layer 11. Therefore, the effective area of ​​the interlayer 13 is the area of ​​the end face of the first tungsten carbide layer 11, which can be directly calculated using the shape and size parameters of the housing grinding fixture. For example, for a rectangular housing grinding fixture, the length is directly multiplied by the width. The value can be determined based on the energy absorption capacity of the material of interlayer 13 during the impact process. For example, it can be 0.7 for stainless steel and 0.8 for titanium alloy.

[0025] In an optional embodiment of the present invention, step 1033, determining the target interlayer thickness of the interlayer 13 based on the initial thickness of the interlayer 13 and the maximum grinding pressure of the housing grinding fixture, may include: Step 10331, based on the maximum grinding pressure of the shell grinding fixture, using the formula... To determine the minimum thickness parameter of interlayer 13 to satisfy bending stiffness under maximum grinding pressure. ;in, The maximum grinding pressure is L; L is the stress span of interlayer 13. The yield strength is a material parameter of interlayer 13. Step 10332: Determine the target interlayer thickness based on the initial and minimum thickness parameters of interlayer 13.

[0026] In this embodiment, L is the stress span or effective length of the interlayer 13; by calculating the minimum thickness parameter, it can be effectively ensured that the interlayer 13 can meet the requirements of the maximum grinding pressure while meeting the toughness and strength requirements, thereby preventing deformation or damage under the maximum grinding pressure; the target interlayer thickness is determined according to the initial thickness and minimum thickness parameter of the interlayer 13, specifically by comparing the initial thickness and minimum thickness parameter of the interlayer 13 and taking the maximum value of the two as the target interlayer thickness.

[0027] In an optional embodiment of the present invention, step 104, determining the first thickness parameter of the first tungsten carbide layer 11 and the second thickness parameter of the second tungsten carbide layer 12 based on the target thickness of the interlayer 13, the total thickness of the housing grinding fixture, and the first preset parameter, may include: Step 1041: Determine the first thickness parameter of the first tungsten carbide layer 11 based on the target interlayer thickness of the interlayer 13, the total thickness of the shell grinding fixture, and the first preset parameter. Step 1042, based on the first thickness parameter of the first tungsten steel layer 11, using the formula Determine the second thickness parameter of the second tungsten steel layer 12. ;in, The first preset parameter has a value range of 0.5 to 0.65; The total thickness of the housing grinding fixture; The target interlayer thickness is 13.

[0028] In this embodiment, the first preset parameter can be selected according to the requirements. When the first thickness parameter of the first tungsten carbide layer 11 and the second thickness parameter of the second tungsten carbide layer 12 are the same, the value can be 0.5. When the grinding surface mainly bears unidirectional pressure or friction, the thickness of one side can be increased, so a value greater than 0.5 can be selected.

[0029] In an optional embodiment of the present invention, step 1041, determining the first thickness parameter of the first tungsten carbide layer 11 based on the target interlayer thickness of the interlayer 13, the total thickness of the housing grinding fixture, and the first preset parameter, may include: Based on the target interlayer thickness of the interlayer 13, the total thickness of the housing grinding fixture, and the first preset parameters, the formula is used... Determine the first thickness parameter ;in, The first preset parameter has a value range of 0.5 to 0.65; The total thickness of the housing grinding fixture; The target interlayer thickness is 13.

[0030] In an optional embodiment of the present invention, the four corners of the double-sided grinding housing grinding fixture are provided with chamfers of a preset angle, and the chamfer parameters of the preset angles are determined by the following method: Step 1051: Determine the first range of chamfering parameters based on the shape and size parameters of the housing grinding fixture and the total thickness of the housing grinding fixture; Step 1052, based on the first range, using the formula Determine the chamfer parameters; among which, The fracture toughness of tungsten carbide; This represents the fatigue limit of tungsten carbide. This is the geometric correction factor, ranging from 1.2 to 1.5.

[0031] In this embodiment, step 1051 can be based on Determine the first range C1 of the chamfer parameters; where L1 is the minimum side length of two adjacent sides at the chamfer position of the shell grinding fixture; The total thickness of the housing grinding fixture; step 1052 can be based on and Determine the chamfer parameters that simultaneously satisfy both of the above conditions; the chamfer parameters typically take values ​​within the range of... Therefore, the chamfer parameters can also be determined directly based on... and preset range To be confirmed.

[0032] In this embodiment, the design of the chamfer parameters can optimize the impact load transmission path and prevent corner cracks, thereby further reducing the impact force of the chamfer on the overall structure when the double-sided grinding jig is dropped, thus further improving the toughness of the double-sided grinding jig.

[0033] The parameter determination method for the double-sided grinding housing grinding fixture of the present invention improves the overall toughness of the double-sided grinding housing grinding fixture by setting a material with a toughness value greater than that of tungsten steel and a density lower than that of tungsten steel between the first tungsten steel layer 11 and the second tungsten steel layer 12, while reducing the weight of the double-sided grinding housing grinding fixture. This reduces the impact force on the double-sided grinding housing grinding fixture when it is dropped, prevents the tungsten steel material grinding fixture from breaking after falling, increases the service life of the grinding fixture, and reduces production costs.

[0034] like Figures 2 to 4 As shown, embodiments of the present invention also provide a housing grinding fixture for double-sided grinding, comprising: A first tungsten carbide layer 11, a second tungsten carbide layer 12, and an interlayer 13 disposed between the first tungsten carbide layer 11 and the second tungsten carbide layer 12, wherein the two end faces of the interlayer 13 are fixedly connected to the first tungsten carbide grinding disc 11 and the second tungsten carbide grinding disc 12, respectively. The parameters of the first tungsten carbide layer 11, the second tungsten carbide layer 12, and the interlayer 13 are determined in the following manner: Obtain the target depth parameters of the shell 3 to be ground, the target toughness value of the shell grinding fixture, the shape and size parameters, and the material parameters of the interlayer 13; The total thickness of the shell grinding fixture is determined based on the target depth parameters of the shell 3 to be ground; The target interlayer thickness of the interlayer 13 is determined based on the target toughness value, shape and size parameters of the shell grinding fixture and the material parameters of the clamping piece 13. Based on the target interlayer thickness of the interlayer 13, the total thickness of the shell grinding fixture, and the first preset parameters, the first thickness parameter of the first tungsten steel layer 11 and the second thickness parameter of the second tungsten steel layer 12 are determined respectively.

[0035] In this embodiment, the two end faces of the interlayer 13 can be bonded and fixed to the first tungsten steel layer 11 and the second tungsten steel layer 12 respectively by strong adhesive; the first tungsten steel layer 11, the second tungsten steel layer 12 and the interlayer 13 are all frame structures, that is, the interior is provided with a hollow inner frame area. When in use, it needs to be used in conjunction with the fixing fixture 2. The specific usage process is as follows: First, place the frame of the shell to be ground 3 into the inner frame of the double-sided grinding shell grinding fixture, then put the fixing fixture 2 into the inner frame of the shell grinding fixture and form a clamping arrangement for the frame to be ground, thereby fixing the shell 3 to be ground. Then, the fixed double-sided grinding shell grinding fixture is placed into the mounting groove of the grinding fixture for fixing, and the part protruding from the shell grinding fixture is ground by the grinding equipment until it reaches the same as the total thickness of the shell grinding fixture.

[0036] In an optional embodiment of the present invention, the four corners of the first tungsten carbide layer 11, the second tungsten carbide layer 12, and the interlayer 13 are all provided with chamfers of a preset angle; the parameter range of the chamfer is... .

[0037] The chamfering parameters of the preset angle are determined in the following way: The first range of chamfering parameters is determined based on the shape and size parameters of the housing grinding fixture and the total thickness of the housing grinding fixture; Based on the first range, through the formula Determine the chamfer parameters; among which, The fracture toughness of tungsten carbide; This represents the fatigue limit of tungsten carbide. This is the geometric correction factor, ranging from 1.2 to 1.5.

[0038] In an optional embodiment of the present invention, the density of the interlayer 13 is less than the density of the first tungsten steel layer 11 and the density of the second tungsten steel layer 12, and greater than the toughness value of the first tungsten steel layer 11 and the toughness value of the second tungsten steel layer 12.

[0039] In an optional embodiment of the present invention, the interlayer 13 is made of stainless steel or titanium alloy.

[0040] The double-sided grinding fixture of the present invention improves the overall toughness of the double-sided grinding fixture by placing a material with a toughness greater than that of tungsten steel and a density less than that of tungsten steel between the first tungsten steel layer 11 and the second tungsten steel layer 12, while reducing the weight of the double-sided grinding fixture. This reduces the impact force on the double-sided grinding fixture when it is dropped, prevents the tungsten steel grinding fixture from breaking after falling, increases the service life of the grinding fixture, and reduces production costs.

[0041] In an optional embodiment of the present invention, the four corners of the first tungsten steel layer 11, the second tungsten steel layer 12, and the interlayer 13 are all provided with chamfers of a preset angle.

[0042] In this embodiment, the chamfer design optimizes the impact load transmission path and prevents corner cracks, thereby further reducing the impact force on the overall structure at the chamfer when the double-sided grinding jig is dropped, thus further improving the toughness of the double-sided grinding jig.

[0043] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for determining the parameters of a shell grinding fixture for a double-sided grinder, characterized in that, The double-sided grinding fixture includes: a first tungsten carbide layer (11), a second tungsten carbide layer (12), and an interlayer (13) disposed between the first tungsten carbide layer (11) and the second tungsten carbide layer (12). The two end faces of the interlayer (13) are fixedly connected to the first tungsten carbide layer (11) and the second tungsten carbide layer (12), respectively. The method includes: Obtain the target depth parameters of the shell to be ground (3), the target toughness value of the shell grinding fixture, the shape and size parameters, and the material parameters of the interlayer (13); The total thickness of the shell grinding fixture is determined based on the target depth parameters of the shell to be ground (3); The target sandwich thickness of the sandwich layer (13) is determined based on the target toughness value, shape and size parameters of the shell grinding fixture and the material parameters of the clamping piece (13). Based on the target thickness of the interlayer (13), the total thickness of the shell grinding fixture, and the first preset parameters, the first thickness parameter of the first tungsten steel layer (11) and the second thickness parameter of the second tungsten steel layer (12) are determined respectively.

2. The method for determining the parameters of the double-sided grinding fixture according to claim 1, characterized in that, The target toughness value is determined in the following way: Obtain the current environmental operating parameters of the housing grinding fixture; Based on the current environmental operating parameters of the housing grinding fixture, using the formula... Determine the target toughness value of the current shell grinding fixture. ; Where h is the maximum drop height of the shell grinding fixture during operation, in meters; m is the estimated weight of the shell grinding fixture, in kilograms; This is the stiffness coefficient corresponding to the ground material; The second preset parameter is set to 0.8; For safety, we set it to 1.

2.

3. The method for determining the parameters of the double-sided grinding fixture according to claim 1, characterized in that, Based on the target toughness value, shape and size parameters of the shell grinding fixture, and the material parameters of the interlayer (13), the target interlayer thickness of the interlayer (13) is determined, including: Based on the shape and size parameters of the housing grinding fixture, determine the effective area of ​​the connection end face between the interlayer (13) and the first tungsten steel layer (11); Based on the target toughness value of the shell grinding fixture, the effective area of ​​the interlayer (13), and the material parameters of the interlayer (13), the formula is used to determine the toughness value of the shell grinding fixture. Determine the initial thickness of the interlayer (13) ; in, The yield strength is the material parameter of the interlayer (13); Elongation is the material parameter of the sandwich layer (13); The effective area of ​​the mezzanine (13); The target toughness value; The third preset parameter is set to 0.8; The energy absorption capacity of the interlayer (13) material during the impact process is taken as 0.6 to 0.9; The target thickness of the interlayer (13) is determined based on the initial thickness of the interlayer (13) and the maximum grinding pressure on the shell grinding fixture.

4. The method for determining the parameters of the double-sided grinding fixture according to claim 3, characterized in that, The target thickness of the interlayer (13) is determined based on the initial thickness of the interlayer (13) and the maximum grinding pressure of the shell grinding fixture, including: Based on the maximum grinding pressure of the housing grinding fixture, using the formula... To determine the minimum thickness parameter of the interlayer (13) to satisfy the bending stiffness under the maximum grinding pressure. ;in, The maximum grinding pressure is L; the stress span of the interlayer (13) is L. The yield strength is the material parameter of the interlayer (13); The target interlayer thickness is determined based on the initial and minimum thickness parameters of the interlayer (13).

5. The method for determining the parameters of the double-sided grinding fixture according to claim 1, characterized in that, Based on the target thickness of the interlayer (13), the total thickness of the shell grinding fixture, and the first preset parameters, the first thickness parameter of the first tungsten carbide layer (11) and the second thickness parameter of the second tungsten carbide layer (12) are determined, including: The first thickness parameter of the first tungsten steel layer (11) is determined based on the target interlayer thickness of the interlayer (13), the total thickness of the shell grinding fixture, and the first preset parameter. Based on the first thickness parameter of the first tungsten steel layer (11), the formula is used. Determine the second thickness parameter of the second tungsten carbide layer (12). ;in, The first preset parameter has a value range of 0.5 to 0.65; The total thickness of the housing grinding fixture; The target interlayer thickness is the interlayer (13).

6. The method for determining the parameters of the double-sided grinding fixture according to claim 5, characterized in that, Based on the target interlayer thickness of the interlayer (13), the total thickness of the shell grinding fixture, and the first preset parameters, the first thickness parameter of the first tungsten steel layer (11) is determined, including: Based on the target interlayer thickness of the interlayer (13), the total thickness of the shell grinding fixture, and the first preset parameters, the formula is used to... Determine the first thickness parameter ;in, The first preset parameter has a value range of 0.5 to 0.65; The total thickness of the housing grinding fixture; The target interlayer thickness is the interlayer (13).

7. The method for determining the parameters of the double-sided grinding fixture according to claim 1, characterized in that, The four corners of the double-sided grinding fixture are all chamfered at a preset angle. The chamfer parameters of the preset angles are determined in the following way: The first range of chamfering parameters is determined based on the shape and size parameters of the housing grinding fixture and the total thickness of the housing grinding fixture; Based on the first range, through the formula Determine the chamfer parameters; among which, The fracture toughness of tungsten carbide; This represents the fatigue limit of tungsten carbide. This is the geometric correction factor, ranging from 1.2 to 1.

5.

8. A double-sided grinding fixture with a housing, characterized in that, include: The first tungsten carbide layer (11), the second tungsten carbide layer (12), and the interlayer (13) disposed between the first tungsten carbide layer (11) and the second tungsten carbide layer (12), wherein the two end faces of the interlayer (13) are fixedly connected to the first tungsten carbide grinding disc (11) and the second tungsten carbide grinding disc (12), respectively. The parameters of the first tungsten carbide layer (11), the second tungsten carbide layer (12), and the interlayer (13) are determined in the following manner: Obtain the target depth parameters of the shell to be ground (3), the target toughness value of the shell grinding fixture, the shape and size parameters, and the material parameters of the interlayer (13); The total thickness of the shell grinding fixture is determined based on the target depth parameters of the shell to be ground (3); The target sandwich thickness of the sandwich layer (13) is determined based on the target toughness value, shape and size parameters of the shell grinding fixture and the material parameters of the clamping piece (13). Based on the target thickness of the interlayer (13), the total thickness of the shell grinding fixture, and the first preset parameters, the first thickness parameter of the first tungsten steel layer (11) and the second thickness parameter of the second tungsten steel layer (12) are determined respectively.

9. The double-sided grinding fixture for a housing according to claim 8, characterized in that, The first tungsten steel layer (11), the second tungsten steel layer (12), and the interlayer (13) are all provided with chamfers of a preset angle at their four corners.

10. The double-sided grinding fixture for a housing according to claim 9, characterized in that, The chamfering parameters of the preset angle are determined in the following way: The first range of chamfering parameters is determined based on the shape and size parameters of the housing grinding fixture and the total thickness of the housing grinding fixture; Based on the first range, through the formula Determine the chamfer parameters; among which, The fracture toughness of tungsten carbide; This represents the fatigue limit of tungsten carbide. This is the geometric correction factor, ranging from 1.2 to 1.5.

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