A drilling die with a double-sided V-groove sheet metal assembly and a drilling method thereof.

Abstract

This invention discloses a drilling mold and drilling method for sheet metal components with double-sided V-grooves, belonging to the field of machining. The drilling mold includes a drilling mold base, a drilling template, locating pins, locating mandrels, diamond pins, a height adjustment seat, a drilling template guide pin, an inner support adjustment block, a clamping nut, a hinged screw, and an adjusting screw. The drilling process using this mold is as follows: the shaped and calibrated workpiece is placed into the drilling mold base, the diamond pin of the base is inserted into the workpiece's locating hole, the locating mandrel is inserted between the locating pin and the double-sided V-grooves of the workpiece, the height is adjusted to be flush with the upper surface of the workpiece using the height adjustment seat, the inner support adjustment block is installed, and the adjusting screw is used to support the upper and lower surfaces of the workpiece's interior. Then, the drilling template is installed and tightened, finally completing the drilling. This invention solves the problems of low drilling efficiency, easy workpiece deformation, and low dimensional compliance rate in sheet metal components, offering advantages of low cost and high quality.

Description

Technical Field

[0001] This invention relates to the fields of machining and sheet metal processing technology, and in particular to a drilling mold with a double-sided V-groove sheet metal assembly and a drilling method thereof. Background Technology

[0002] like Figures 1 to 3 The image shows a sheet metal component in a missile safety actuator. As a key part of the transmission gear set, this component has high requirements for dimensional accuracy and geometric tolerances. The component is composed of two parts, which have been separately manufactured in the previous process using sheet metal bending and then spot-welded to form the assembly. The lower half of the component has a double-sided V-groove in its inner cavity, and the upper surface is the surface to be machined, containing a system of holes of various diameters.

[0003] In the current processing, due to the cumulative error of component assembly, deformation during welding, and clamping deformation at thin-walled sections, conventional methods for machining hole systems are prone to problems such as dimensional deviations and part deformation. The relative positional accuracy of the machined hole system and the double-sided V-groove below cannot meet the design requirements, which not only increases scrap and rework, but also affects the transmission performance and accuracy of the entire mechanism. Summary of the Invention

[0004] The purpose of this invention is to provide a drilling mold and drilling method for a sheet metal assembly with double-sided V-grooves. Based on the spatial relationship between the double-sided V-grooves and the circular holes on the assembly, a drilling mold positioning and clamping method is designed. A height adjustment seat ensures the installation accuracy of the drilling mold template, and an internal support adjustment block is set to prevent assembly deformation during processing, thereby improving the rigidity of the assembly after clamping. Using this drilling mold, all holes can be processed in a single clamping operation, offering advantages such as convenient operation, unified reference, and accurate positioning. Simultaneously, it effectively improves the assembly processing pass rate and reduces quality costs.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] A drilling die for a sheet metal assembly with double-sided V-grooves, comprising:

[0007] Drill jig base, drill template, positioning pin, positioning mandrel, diamond pin, height adjustment seat, guide pin, inner support adjustment block, clamping nut, hinged screw, adjusting screw;

[0008] The drill jig base and the drill template are arranged opposite to each other, and the space between them is used to place sheet metal components with double-sided V-grooves. The drill template has several through holes corresponding to the positions of the holes to be drilled on the sheet metal components.

[0009] Four locating pins are installed on the drill jig base, symmetrically distributed on both sides of the drill jig base. The installation positions of the two locating pins on each side are equidistant from the reference axis X.

[0010] A diamond-shaped pin is installed on the drill jig base to mate with the positioning hole on the sheet metal component. The long axis of the diamond-shaped pin is parallel to the X-axis direction.

[0011] The drill jig base is equipped with hinged screws and clamping nuts on both sides for clamping the drill jig template;

[0012] The drill jig base is equipped with four height adjustment seats to support the drill template and adjust its height. After the drill template is installed in the drill jig base, the lower surface of the drill template fits tightly against the upper surface of the four height adjustment seats.

[0013] Two guide pins are installed on the drill template. When the drill template is installed into the drill jig base, the guide pins are simultaneously inserted into the guide pin holes of the drill jig base to play a positioning role.

[0014] There are two positioning mandrels, with the same diameter and a length not less than the length of the V-groove of the sheet metal component. They are installed between the double V-grooves and the positioning pin of the sheet metal component. The outer circle of the positioning mandrel is tangent to the two sides of the V-groove of the sheet metal component, and is also tangent to the generatrix of the outer cylindrical surface of the positioning pin.

[0015] The inner support adjustment core block is placed in the inner cavity of the sheet metal assembly, and four adjustment screws are installed on it to adjust the height of the inner support adjustment core block, ensuring good contact between the inner support adjustment core block and the upper surface of the inner cavity of the sheet metal assembly, and preventing deformation during processing.

[0016] Optionally, the upper and lower surfaces of the drill jig base are parallel, and the upper and lower surfaces of the drill template are parallel.

[0017] Optionally, a plurality of through holes on the drilling template are perpendicular to the upper and lower surfaces.

[0018] Optionally, the positioning pin and the mounting hole on the drill jig base are interference fits, and the diamond pin and the mounting hole on the drill jig base are interference fits.

[0019] Optionally, the inner support adjustment core block is rectangular in shape, with its length matching the length of the inner cavity of the sheet metal component, its width being less than the minimum width of the inner cavity of the sheet metal component, and its thickness being less than the height of the inner cavity of the sheet metal component.

[0020] Optionally, the height adjustment seat adjusts the top height via an internal fine thread.

[0021] Optionally, the inner support adjusting core block is provided with four mounting holes for installing adjusting screws, and the height of the inner support adjusting core block is adjusted by the threads.

[0022] A drilling method for a sheet metal assembly with double-sided V-groove, implemented using a drilling mold with a double-sided V-groove sheet metal assembly as described in any of the above claims, includes the following steps:

[0023] Step 1: Shape and correct the double-sided V-grooves on the sheet metal assembly;

[0024] Step 2: Install the shaped and calibrated sheet metal component into the drill jig base, so that the diamond pin on the drill jig base is inserted into the positioning hole on the sheet metal component, and the bottom surface of the sheet metal component is tightly fitted with the upper surface of the drill jig base;

[0025] Step 3: Insert a locating mandrel between the locating pin and the V-groove on both sides of the sheet metal assembly, and insert one locating mandrel on each side;

[0026] Step 4: Measure the distance from the bottom surface to the top surface of the sheet metal component, and adjust the four height adjustment seats so that their top surfaces are flush with the top surface of the sheet metal component.

[0027] Step 5: Install the inner support adjustment core block and adjust the height of the four adjustment screws to support the upper and lower surfaces inside the sheet metal assembly;

[0028] Step 6: Insert the drill template, so that the guide pin on the drill template is inserted into the guide pin hole of the drill template base, while ensuring that the lower surface of the drill template is in close contact with the upper surface of the height adjustment seat.

[0029] Step 7: Tighten the clamping nut on the hinge screw to clamp the drill template and drill all holes on the upper surface of the sheet metal component in one go.

[0030] Optionally, it also includes:

[0031] After shaping and correction, measure the distance D1 between the center lines of the inscribed cylinders on both sides of the V-groove, the distance D2 between the outer generatrices of the cylindrical surface of the positioning pin, and the diameter D3 of the inscribed cylinder, ensuring that D1 = D2 + D3, wherein the inscribed cylinder is an imaginary cylinder and its diameter is equal to the diameter of the positioning mandrel.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] (1) The present invention provides a drilling mold with a sheet metal component with double-sided V-groove, which can drill holes in irregular sheet metal components with V-groove, thereby improving drilling quality and ensuring the relative size and position accuracy of the hole system.

[0034] (2) This invention provides a drilling method for sheet metal components with double-sided V-grooves. With the help of specially designed drilling molds, the method solves the problems of ineffective positioning, easy deformation, and low dimensional accuracy in the process of drilling sheet metal components with double-sided V-grooves. It greatly reduces the risk of scrapping, increases the pass rate from about 80% to more than 99%, and the process is stable.

[0035] (3) The drilling mold provided by the present invention has a simple structure, low manufacturing cost, and is easy to use. The drilling operation using the mold is simple and practical. General operators can quickly learn to use it, and it is suitable for widespread application. Attached Figure Description

[0036] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are one embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0037] Figure 1 This is a front view of a sheet metal assembly with double-sided V-grooves that requires drilling in this invention.

[0038] Figure 2 This is a top view of a sheet metal assembly with double-sided V-grooves that requires drilling in this invention;

[0039] Figure 3 This is a cross-sectional view AA of a sheet metal assembly with double-sided V-grooves that requires drilling in this invention;

[0040] Figure 4 This is a three-dimensional structural diagram of the drilling mold described in this invention;

[0041] Figure 5 This is a top view of the drilling mold described in this invention;

[0042] Figure 6a for Figure 5 BB section view in the middle;

[0043] Figure 6b for Figure 5 CC section view in the middle;

[0044] Figure 7 This is a schematic diagram of the drill jig base structure of the drilling mold described in this invention;

[0045] Figure 8 This is a schematic diagram of the drill template structure of the drilling mold described in this invention;

[0046] Figure 9 This is a schematic diagram of the height adjustment seat structure of the drilling mold described in this invention;

[0047] Figure 10 This is a schematic diagram of the internal support adjustment core block structure of the drilling mold described in this invention;

[0048] Figure 11 This is a schematic diagram showing the positional relationship between the sheet metal components, positioning mandrel, and positioning pin described in this invention;

[0049] Figure 12This is a structural diagram of the diamond-shaped pin of the drilling mold described in this invention;

[0050] Figure 13 This is a schematic diagram showing the installation position of the diamond-shaped pin in the drilling mold described in this invention. Detailed Implementation

[0051] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0052] Combination Figures 4-10 As shown, the present invention provides a drilling mold for a sheet metal assembly with double-sided V-grooves, comprising: a drilling mold base 1, a drilling template 2, a positioning pin 3, a positioning mandrel 4, a diamond pin 5, a height adjustment seat 6, a guide pin 7, an inner support adjustment block 8, a clamping nut 9, a hinged screw 10, and an adjusting screw 11. The drilling mold base 1 and the drilling template 2 are arranged opposite to each other, and the sheet metal assembly with double-sided V-grooves is placed between them. The drilling template 2 has several through holes 21 corresponding to the positions on the sheet metal assembly to be drilled.

[0053] like Figure 7 and Figure 6a As shown, the upper and lower surfaces of the drill jig base 1 are parallel, and four locating pins 3 are installed for positioning the sheet metal assembly and the drill jig base 1. The four locating pins 3 are symmetrically distributed on both sides, and the installation positions of the two locating pins 3 on each side are equidistant from the reference axis X. The locating pins 3 and the locating pin mounting holes 11 on the drill jig base 1 are interference fits. A diamond-shaped pin 5 is installed on the drill jig base 1. The major axis of the diamond-shaped pin must be parallel to the X-axis direction. The function of the diamond-shaped pin 5 is to restrict the degree of freedom of the sheet metal assembly in the X direction. The structural diagram of the diamond-shaped pin 5 is shown in [reference needed]. Figure 12 See the installation diagram for the diamond pin. Figure 13 The diamond-shaped pin 5 and the diamond-shaped pin mounting hole 12 on the drill jig base 1 are interference-fitted. Both sides of the drill jig base 1 are equipped with hinged screws 10 and clamping nuts 9 for clamping the drill template 2. Four height adjustment seats 6 are installed on the drill jig base 1 to support the drill template 2 and adjust its height. After the drill template 2 is installed in the drill jig base 1, its lower surface fits tightly against the upper surface of the four height adjustment seats 6. The height adjustment seats 6 are installed in the height adjustment seat mounting hole 13 on the drill jig base 1. Figure 9 As shown, the height adjustment seat 6 has fine threads inside, and the height of the top end can be adjusted by the fine threads inside.

[0054] like Figure 8 and Figure 6aAs shown, the drill template 2 is a flat plate structure with parallel upper and lower surfaces. Several through holes 21 on the drill template 2 are perpendicular to the upper and lower surfaces, serving as guides during drilling. Two guide pins 7 are installed on the drill template 2. When the drill template 2 is inserted into the drill jig base 1, the guide pins 7 simultaneously insert into the guide pin holes 14 of the drill jig base 1, serving a positioning function. The guide pins 7 are installed in the guide pin mounting holes 22 on the drill template 2.

[0055] like Figure 6a As shown, the positioning mandrels 4 must be used in pairs. The two positioning mandrels 4 have the same diameter and their length is not less than the length of the V-groove of the sheet metal component. The positioning mandrels 4 are installed between the V-grooves on both sides of the sheet metal component and the positioning pins 3, ensuring that the outer circle of the positioning mandrel 4 is tangent to the two sides of the V-groove of the sheet metal component, and is also tangent to the outer generatrix of the cylindrical surface of the positioning pins 3.

[0056] like Figure 6a As shown, the inner support adjusting core block 8 is placed in the inner cavity of the sheet metal assembly, and four adjusting screws (11) are installed on it to adjust the height of the inner support adjusting core block (8), ensuring good contact between the inner support adjusting core block 8 and the upper surface of the inner cavity of the sheet metal assembly, and preventing deformation during processing. Figure 10 As shown, the inner support adjusting core block 8 is rectangular in shape. Its length is the same as the inner cavity length of the sheet metal assembly, its width is less than the minimum width of the inner cavity of the sheet metal assembly, and its thickness is less than the inner cavity height of the sheet metal assembly. The inner support adjusting core block 8 has four adjusting screw mounting holes 81 for mounting adjusting screws. The adjusting screws can adjust the height of the inner support adjusting core block 8 through the threads, ensuring good contact between the inner support adjusting core block 8 and the upper surface of the inner cavity of the sheet metal assembly, and preventing deformation during processing.

[0057] The present invention also provides a drilling method for a sheet metal assembly with double-sided V-grooves, based on the above-mentioned drilling mold for a sheet metal assembly with double-sided V-grooves, comprising the following steps:

[0058] Step S1: Shape and correct the double-sided V-grooves on the sheet metal assembly to ensure that the center lines of the inscribed cylinders on both sides of the V-grooves are parallel and that the distances from the center lines of the inscribed cylinders on both sides to the bottom surface of the sheet metal assembly are equal.

[0059] Furthermore, after the sheet metal assembly is shaped and corrected, the distance D1 between the center lines of the inscribed cylinders on both sides of the V-groove, the distance D2 between the outer generatrices of the locating pin cylindrical surfaces, and the diameter D3 of the inscribed cylinder must be measured to ensure that D1 = D2 + D3 (e.g., ...). Figure 11 (As shown). The inscribed cylinder here is an imaginary cylinder, and its diameter is equal to the diameter of the positioning mandrel.

[0060] Step S2: Install the shaped and calibrated sheet metal component into the drill jig base, so that the diamond pin on the base is inserted into the positioning hole of the sheet metal component, and the bottom surface of the sheet metal component is tightly fitted with the upper surface of the drill jig base;

[0061] Step S3: Insert a locating mandrel between the locating pin and the V-groove on both sides of the sheet metal assembly, and insert one locating mandrel on each side;

[0062] Step S4: Measure the distance from the bottom surface to the top surface of the sheet metal component, and adjust the four height adjustment seats so that their top surfaces are flush with the top surface of the sheet metal component.

[0063] Step S5: Install the inner support adjustment core block and adjust the height of the four adjustment screws to support the upper and lower surfaces inside the sheet metal assembly.

[0064] Step S6: Insert the drill template, so that the guide pin on the drill template is inserted into the guide pin hole of the drill template base, while ensuring that the lower surface of the drill template is in close contact with the upper surface of the height adjustment seat.

[0065] Step S7: Tighten the clamping nut on the hinge screw to clamp the drill template and drill all holes on the upper surface of the sheet metal component in one go.

[0066] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0067] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A drilling mold with a double-sided V-groove sheet metal assembly, characterized in that, include: Drill jig base (1), drill template (2), positioning pin (3), positioning mandrel (4), diamond pin (5), height adjustment seat (6), guide pin (7), inner support adjustment block (8), clamping nut (9), hinge screw (10), adjusting screw (11); The drill jig base (1) and the drill template (2) are arranged opposite to each other, and the sheet metal component with double-sided V-groove is placed between them. The drill template (2) is provided with several through holes corresponding to the drilling positions on the sheet metal component. Four positioning pins (3) are installed on the drill jig base (1), symmetrically distributed on both sides of the drill jig base (1), and the installation positions of the two positioning pins (3) on each side are equidistant from the reference axis X. A diamond pin (5) is installed on the drill jig base (1) for engaging with the positioning hole on the sheet metal assembly. The long axis of the diamond pin (5) is parallel to the X-axis direction. Two hinged screws (10) and clamping nuts (9) are installed on the two sides of the drill jig base (1) for clamping the drill template (2); Four height adjustment seats (6) are installed on the drill jig base (1) to support the drill template (2) and adjust the height of the drill template (2). After the drill template (2) is installed in the drill jig base (1), the lower surface of the drill template (2) is in close contact with the upper surface of the four height adjustment seats (6). Two guide pins (7) are installed on the drill template (2). When the drill template is installed into the drill base (1), the guide pins are simultaneously inserted into the guide pin holes of the drill base (1) to play a positioning role. The positioning mandrel (4) consists of two rods with the same diameter and a length not less than the length of the V-groove of the sheet metal component. They are installed between the double V-groove of the sheet metal component and the positioning pin (3). The outer circle of the positioning mandrel (4) is tangent to the two sides of the V-groove of the sheet metal component, and is also tangent to the outer cylindrical generatrix of the positioning pin (3). The inner support adjustment core block (8) is placed in the inner cavity of the sheet metal assembly, and four adjustment screws (11) are installed on it to adjust the height of the inner support adjustment core block (8) to ensure good contact between the inner support adjustment core block (8) and the upper surface of the inner cavity of the sheet metal assembly, and to prevent deformation during processing.

2. The drilling mold with a double-sided V-groove sheet metal assembly as described in claim 1, characterized in that, The upper and lower surfaces of the drill jig base (1) are parallel, and the upper and lower surfaces of the drill template (2) are parallel.

3. The drilling mold with a double-sided V-groove sheet metal assembly as described in claim 2, characterized in that, The through holes on the drilling template (2) are perpendicular to the upper and lower surfaces.

4. The drilling mold with a double-sided V-groove sheet metal assembly as described in claim 1, characterized in that, The positioning pin (3) and the mounting hole on the drill jig base (1) are interference fits, and the diamond pin (5) and the mounting hole on the drill jig base (1) are interference fits.

5. The drilling mold with a double-sided V-groove sheet metal assembly as described in claim 1, characterized in that, The inner support adjustment core block (8) is rectangular in shape, its length is the same as the length of the inner cavity of the sheet metal component, its width is less than the minimum width of the inner cavity of the sheet metal component, and its thickness is less than the height of the inner cavity of the sheet metal component.

6. The drilling mold with a double-sided V-groove sheet metal assembly as described in claim 1, characterized in that, The height adjustment seat adjusts the top height via an internal fine thread.

7. The drilling mold with a double-sided V-groove sheet metal assembly as described in claim 1, characterized in that, The inner support adjusting core block (8) is provided with four mounting holes for installing adjusting screws (11) to adjust the height of the inner support adjusting core block (8) by means of the thread.

8. A drilling method for a sheet metal assembly with double-sided V-grooves, characterized in that, The drilling die with a double-sided V-groove sheet metal assembly as described in any one of claims 1 to 7 is used to achieve the following steps: Step 1: Shape and correct the double-sided V-grooves on the sheet metal assembly; Step 2: Install the shaped and calibrated sheet metal component into the drill jig base (1), so that the diamond pin (5) on the drill jig base (1) is inserted into the positioning hole on the sheet metal component, and the bottom surface of the sheet metal component is tightly attached to the upper surface of the drill jig base (1). Step 3: Insert a positioning mandrel (4) between the positioning pin (3) and the V-groove on both sides of the sheet metal assembly, and insert a positioning mandrel (4) on each side. Step 4: Measure the distance from the bottom surface to the top surface of the sheet metal component, and adjust the four height adjustment seats (6) so that their top surfaces are flush with the top surface of the sheet metal component; Step 5: Install the inner support adjusting core block (8) and adjust the height of the four adjusting screws (11) to support the upper and lower surfaces inside the sheet metal assembly; Step 6: Insert the drill template (2) so that the guide pin (7) on the drill template (2) is inserted into the guide pin hole of the drill base (1), while ensuring that the lower surface of the drill template (2) is in close contact with the upper surface of the height adjustment seat (6). Step 7: Tighten the clamping nut (9) on the hinge screw (10) to clamp the drill template (2) and drill all holes on the upper surface of the sheet metal assembly in one go.

9. The drilling method for a sheet metal assembly with double-sided V-grooves as described in claim 8, characterized in that, Also includes: After shaping and correction, measure the distance D1 between the center lines of the inscribed cylinders on both sides of the V-groove, the distance D2 between the generatrices on the outer sides of the cylindrical surface of the positioning pin, and the diameter D3 of the inscribed cylinder, ensuring that D1 = D2 + D3. The inscribed cylinder is an imaginary cylinder with a diameter equal to the diameter of the positioning mandrel.

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