A drill jig

Abstract

The utility model discloses a kind of drill and tap jigs, the drill and tap jig includes: jig body, the jig body is equipped with open cavity, the open cavity is used to place workpiece, at least one end of the top and bottom of the jig body is equipped with the through hole being communicated with the open cavity. The utility model only needs to be directly placed into open cavity workpiece can complete preliminary positioning, operator does not need to repeatedly adjust workpiece position, only needs to be along through hole and be inserted into tool can be processed to workpiece, single person can quickly complete "putting piece-processing" process, greatly simplify tooling management cost and operation complexity, effectively improve single person operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and more specifically to a drilling and tapping fixture. Background Technology

[0002] In the field of machining, for workpieces that require drilling and tapping processes to be completed sequentially, traditional machining methods generally suffer from problems such as cumbersome process connections, complex tooling management, and difficulty in controlling machining accuracy, as detailed below: Firstly, in traditional machining processes, drilling and tapping typically require two separate sets of tooling. The operator first uses a dedicated drilling tool to position and fix the workpiece. After drilling is completed, the workpiece must be removed, the drilling tool unloaded, and then the tapping tool replaced and installed. The workpiece must be repositioned before tapping can begin. This "one tooling per process" model not only increases the procurement and warehousing costs of tooling but also leads to longer process switching times for single-person operations. Frequent tooling disassembly and repositioning of the workpiece significantly reduces overall machining efficiency, especially in scenarios involving small batches and multiple workpieces, where the efficiency loss due to tooling switching is even more pronounced.

[0003] Secondly, traditional machining methods heavily rely on the experience and skill of operators to control workpiece machining accuracy. On the one hand, since drilling and tapping processes need to be performed separately and rely on manual positioning, reference deviations are easily generated during the two positioning processes. This leads to an inaccurate match between the drilling and tapping positions, ultimately causing machining errors such as hole offset and inaccurate tooth pitch, affecting the subsequent assembly accuracy and performance of the workpiece. On the other hand, different operators have different positioning techniques and force control, making it difficult to guarantee consistent machining accuracy even for the same batch of workpieces. This results in large fluctuations in the finished product quality, a high defect rate, and increased production costs and material waste.

[0004] In summary, the shortcomings of existing drilling and tapping methods in terms of tooling utilization and machining accuracy stability have become key issues restricting the improvement of single-person operation efficiency and machining quality assurance. There is an urgent need for a solution that can simplify tooling management and accurately control errors. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of the prior art and provide a drilling and tapping fixture.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a drilling and tapping fixture, including: a fixture body, the fixture body having an opening for placing a workpiece, and at least one end of the top and bottom of the fixture body having a through hole communicating with the opening.

[0007] In one specific embodiment, the opening is further provided with a limiting groove corresponding to the workpiece.

[0008] In one specific embodiment, the edge of the oral cavity is further provided with a guide slope.

[0009] In one specific embodiment, the through hole includes a drilling positioning hole and a tapping positioning hole, which are arranged side by side.

[0010] In one specific embodiment, the hole spacing of the drilling positioning hole and the tapping positioning hole is the same.

[0011] In one specific embodiment, the fixture body is provided with the through holes at both the top and bottom.

[0012] In one specific embodiment, the drilling and tapping fixture further includes a positioning seat, which is used to mate with the fixture body.

[0013] In one specific embodiment, the positioning seat is provided with a positioning groove, and the fixture body is slidably connected to the positioning groove.

[0014] In one specific embodiment, the grooving direction of the positioning groove is perpendicular to the opening direction of the opening cavity.

[0015] In one specific embodiment, both the fixture body and the positioning seat are made of metal.

[0016] The advantages of this drilling and tapping fixture compared to existing technologies are as follows: Through the limiting function of the opening, the workpiece only needs to be placed directly into the opening to complete the initial positioning, eliminating the need for additional clamping components. Simultaneously, the guide holes at the top and / or bottom of the fixture body directly provide a preset path for machining tools (such as drill bits and taps). Operators do not need to repeatedly adjust the workpiece position or calibrate the tool angle; they only need to insert the tool along the guide holes to machine the workpiece. The entire operation eliminates the steps of disassembly and assembly of traditional tooling and secondary workpiece positioning. A single person can quickly complete the "workpiece placement-machining" process, significantly simplifying tooling management costs and operational complexity, effectively improving single-person work efficiency, and is particularly suitable for efficiency requirements in small-batch, multi-batch processing scenarios. Furthermore, precision control is achieved through a dual structure: on the one hand, the opening... The adaptability design between the workpiece and the borehole can provide circumferential positioning for the workpiece, preventing displacement or tilting due to force during processing and ensuring that the workpiece's processing position is always aligned with the preset reference. On the other hand, the precise alignment design of the through hole and the borehole (the axial direction and diameter of the through hole match the workpiece's preset processing parameters) can forcibly constrain the movement trajectory of the processing tool, avoiding problems such as drilling deviation and tapping misalignment caused by operators manually controlling tool force and angle deviations. The synergistic effect of these two aspects forms a full-process precision control from "workpiece positioning" to "tool guidance," effectively eliminating the impact of differences in human operating experience on processing accuracy. This significantly improves the consistency of parameters such as hole position, hole diameter, and tooth pitch for the same batch of workpieces, reduces the defect rate, ensures stable and reliable workpiece quality, and meets the processing accuracy requirements of subsequent assembly.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the drilling and tapping fixture provided in an embodiment of the present utility model; Figure 2 An exploded view of the drilling and tapping fixture provided in an embodiment of this utility model; Figure 3 This is a schematic diagram of the structure of the workpiece and fixture body provided in an embodiment of the present utility model. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0027] See Figures 1 to 3 As shown, this utility model discloses a specific embodiment of a drilling and tapping fixture, including: a fixture body 10, the fixture body 10 having an opening 11 for placing a workpiece 30, and at least one end of the top and bottom of the fixture body 10 having a through hole communicating with the opening 11.

[0028] Specifically, a rectangular metal block is used as the fixture body 10, with a length of 150-200mm, a width of 80-120mm, and a height of 50-80mm, to accommodate the size requirements of most small and medium-sized flat workpieces 30. Furthermore, the left and right ends of the fixture body 10 are opened to form openings 11. The length and width of the openings 11 are fitted with the outer dimensions of the flat workpiece 30 to ensure that the workpiece 30 will not wobble due to excessive clearance after being placed in the openings 11. In addition, according to the preset drilling / tapping positions of the workpiece 30, 2-4 circular through holes are made in the areas corresponding to the openings 11 at the top and / or bottom of the fixture body 10. The diameter of the through holes is 0.05-0.1mm larger than the diameter of the machining tool (drill bit / taper) (e.g., when using a 5mm diameter drill bit, the diameter of the through holes is set to 5.05mm).

[0029] If the workpiece 30 to be processed has a single-sided inclined surface (inclination angle 30°-60°), the inner wall of the opening 11 of the fixture body 10 needs to be machined with an inclined surface of the same angle so that the inclined surface of the workpiece 30 fits completely with the inclined surface of the opening 11 after it is placed in. At the same time, the remaining inner wall of the opening 11 (non-inclination side) is clearance-fitted with the outer shape of the workpiece 30 (gap 0.1-0.2mm) to achieve full circumferential positioning of the workpiece 30; the axis of the through hole is perpendicular to the inclined surface of the workpiece 30 (rather than perpendicular to the top surface of the fixture body 10).

[0030] In other words, thanks to the limiting function of the opening 11, the initial positioning of the workpiece 30 can be completed simply by placing it directly into the opening 11, without the need for additional clamping components. Simultaneously, the guide holes on the top and / or bottom of the fixture body 10 provide preset paths for machining tools (such as drill bits and taps). Operators do not need to repeatedly adjust the position of the workpiece 30 or calibrate the tool angle; they only need to insert the tool along the guide holes to machine the workpiece 30. The entire operation eliminates the steps of disassembling and assembling traditional tooling and secondary positioning of the workpiece 30. A single person can quickly complete the "workpiece placement-machining" process, significantly simplifying tooling management costs and operational complexity, effectively improving single-person work efficiency, especially suitable for efficiency requirements in small-batch, multi-batch processing scenarios. Furthermore, precision control is achieved through a dual structure: on the one hand, the opening 11 and the workpiece 30 are compatible... The design can circumferentially limit the workpiece 30, preventing it from shifting or tilting due to force during processing, and ensuring that the workpiece 30's processing position is always aligned with the preset reference. On the other hand, the precise alignment design of the through hole and the opening 11 (the axial direction and diameter of the through hole match the preset processing parameters of the workpiece 30) can forcibly constrain the movement trajectory of the processing tool, avoiding problems such as drilling deviation and tapping misalignment caused by operators manually controlling the tool's force and angle deviation. The two work together to form full-process precision control from "workpiece positioning" to "tool guidance", effectively eliminating the impact of differences in manual operation experience on processing accuracy, significantly improving the consistency of parameters such as hole position, hole diameter, and tooth pitch of the same batch of workpieces 30, reducing the defect rate, ensuring the stable and reliable quality of workpieces 30, and meeting the processing accuracy requirements of subsequent assembly.

[0031] In one embodiment, the opening 11 is further provided with a limiting groove corresponding to the workpiece 30.

[0032] Specifically, a trapezoidal limiting groove adapted to the protrusion of workpiece 30 is formed along the length direction at the center of the bottom surface of the opening 11. The length of the groove is consistent with the length of the protrusion of workpiece 30, ensuring that the protrusion and the groove fit tightly and are easy to install and remove. The overall dimensions of the opening 11 are clearance-fitted with the outer shape of workpiece 30. After workpiece 30 is placed in, the bottom protrusion is completely embedded in the trapezoidal limiting groove. The trapezoidal structure of the limiting groove can restrict the displacement of workpiece 30 in the width direction, and at the same time, the surface contact between the protrusion and the groove wall constrains the circumferential rotation of workpiece 30.

[0033] In one embodiment, the edge of the oral cavity 11 is further provided with a guide slope.

[0034] Specifically, guide ramps are provided on all four edges of the opening 11, and the ramps extend inwards towards the inside of the opening 11. The starting end of the ramp is 3-5mm wide, and the ending end smoothly transitions to the inner wall of the opening 11. The angle between the ramp and the fixture body 10 is set to 45°-60°, and the surface roughness Ra≤3.2μm to avoid scratching the surface of the workpiece 30.

[0035] In other words, the addition of the guide ramp makes it easier to place the workpiece 30 into the opening 11, while avoiding damage to the workpiece 30 or the edge of the fixture due to jamming.

[0036] In one embodiment, the through hole includes a drilling positioning hole 12 and a tapping positioning hole 13, which are arranged side by side.

[0037] Specifically, drilling positioning holes 12 and tapping positioning holes 13 are arranged side by side on the same longitudinal or transverse straight line corresponding to the opening 11 at the top and / or bottom of the fixture body 10. The center distance between the two holes is determined according to the design spacing of the drilling and tapping holes on the workpiece 30 (e.g., if the center distance between the drilling hole and the tapping hole on the workpiece 30 is 10mm, then the center distance between the two positioning holes is also set to 10mm). The axes of the two holes are perpendicular to the machining surface of the workpiece 30 inside the opening 11.

[0038] In other words, traditional fixtures require drilling through a positioning hole first, then disassembling the workpiece 30, adjusting the position of the fixture or workpiece 30, and then tapping. The single-process changeover time is about 1-2 minutes. In this embodiment, after the workpiece 30 is clamped once, the fixture only needs to be moved horizontally (or the processing equipment can be moved) to complete the tapping through the parallel tapping positioning holes 13. The process changeover time is shortened to 10-15 seconds, and the total processing time of a single workpiece 30 is reduced from 3-4 minutes to 1.5-2 minutes, improving efficiency by 40%-50%. At the same time, the positioning deviation caused by secondary clamping is avoided, and the processing accuracy is significantly improved.

[0039] In one embodiment, the hole spacing of the drilling positioning hole 12 and the tapping positioning hole 13 is the same.

[0040] Specifically, if the hole spacing of the drilling and tapping positioning holes varies at different stations using traditional fixtures, the coordinates of the processing equipment need to be adjusted at each station, which takes a long time. The uniform hole spacing design ensures that the processing parameters at each station are completely unified, shortening the adjustment time and significantly reducing preparation time costs. At the same time, the uniform hole spacing ensures the consistency of the drilling and tapping hole positions of the same batch of workpieces 30, improving the pass rate and reducing the scrapping of workpieces 30 due to hole spacing deviations.

[0041] In one embodiment, the fixture body 10 is provided with the through holes at both the top and bottom.

[0042] Specifically, for workpieces 30 that require holes to be drilled at both ends, through holes are provided at the top and bottom of the fixture body 10 to achieve "one-time clamping and two-way processing", which solves the problem of positioning deviation and efficiency loss caused by the traditional fixture requiring disassembly of workpiece 30, flipping it over and then clamping it.

[0043] In other words, traditional jigs require clamping and machining one end of the lamp body first, then disassembling, flipping, and re-clamping to machine the other end, which takes a long time. In this embodiment, after clamping once, the lamp body is drilled through the top through-hole, and the other end can be machined through the bottom through-hole simply by flipping the jig. This shortens the total processing time, significantly improves efficiency, and also reduces the coaxiality error of the holes, meeting the axis alignment requirements during lamp body assembly.

[0044] In one embodiment, the drilling and tapping fixture further includes a positioning seat 20, which is used to cooperate in mounting the fixture body 10 to achieve positioning.

[0045] Specifically, the positioning seat 20 is made of cast iron, which has good rigidity and stability, and the main body has a frame structure. The positioning seat 20 has a positioning groove 21 that matches the fixture body 10, ensuring that the fixture body 10 has sufficient embedding depth to achieve stable positioning after being placed in.

[0046] In other words, in the traditional structure without the positioning seat 20, the fixture body 10 is placed directly on the worktable, and the machining force can easily cause the fixture to shift. However, the positioning seat 20 plays a precise positioning role for the fixture body 10. At the same time, the high rigidity of the cast iron positioning seat 20 reduces the impact of machining vibration on the fixture.

[0047] In one embodiment, the positioning seat 20 is provided with a positioning groove 21, and the fixture body 10 is slidably connected to the positioning groove 21.

[0048] Specifically, the positioning groove 21 is a rectangular groove, longer than the fixture body 10 (to allow for sliding stroke), and its width is fitted with the bottom dimension of the fixture body 10 with a clearance of 0.03-0.05mm. Rectangular guide grooves are formed on two opposite side walls of the positioning groove 21, and guide protrusions adapted to the grooves are provided on the corresponding side of the fixture body 10. The protrusions are embedded in the grooves to form sliding guides, ensuring that the fixture body 10 can only move along the length of the positioning groove 21 without lateral wobbling.

[0049] In one embodiment, the grooving direction of the positioning groove 21 is perpendicular to the opening direction of the opening cavity 11.

[0050] Specifically, after the fixture body 10 slides into the positioning groove 21, the transverse groove wall of the positioning groove 21 directly abuts against the outer surface of the workpiece 30 in the width direction. A thin wear-resistant rubber pad can also be attached to the groove wall of the positioning groove 21 that abuts against the workpiece 30, which increases the friction with the workpiece 30 and avoids scratches on the surface of the workpiece 30 due to hard contact; the surface of the rubber pad is processed into a plane that fits against the outer surface of the workpiece 30 to ensure that the contact surface is evenly stressed.

[0051] In one embodiment, both the fixture body 10 and the positioning seat 20 are made of metal.

[0052] Specifically, the fixture body 10 is made of 45# high-quality carbon structural steel. The positioning seat 20 is made of HT300 gray cast iron.

[0053] In other words, compared to traditional plastic or aluminum alloy jig bodies 10, the 45# steel material has higher rigidity, which reduces the deformation of the jig body 10 during processing, thereby improving the consistency of the hole position accuracy of the workpiece 30. The HT300 gray cast iron positioning seat 20 has high vibration damping properties, which reduces the amplitude of processing vibration and avoids hole position displacement caused by vibration.

[0054] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A drilling and tapping fixture, characterized in that, include: The fixture body has an opening for placing a workpiece, and at least one end of the top and bottom of the fixture body has a through hole communicating with the opening.

2. The drilling and tapping fixture according to claim 1, characterized in that, The opening is also provided with a limiting groove corresponding to the workpiece.

3. The drilling and tapping fixture according to claim 1, characterized in that, The edge of the oral cavity is also provided with a guide slope.

4. The drill jig of claim 1, wherein The through hole includes a drilling positioning hole and a tapping positioning hole, which are arranged side by side.

5. The drilling and tapping fixture according to claim 4, characterized in that, The spacing between the drilling positioning holes and the tapping positioning holes is the same.

6. The drilling and tapping fixture according to claim 1, characterized in that, The fixture body is provided with the through holes at both the top and bottom.

7. The drilling and tapping fixture according to claim 1, characterized in that, The drilling and tapping fixture also includes a positioning seat, which is used to cooperate in installing the fixture body to achieve positioning.

8. The drilling and tapping fixture according to claim 7, characterized in that, The positioning seat is provided with a positioning groove, and the fixture body is slidably connected to the positioning groove.

9. The drilling and tapping fixture according to claim 8, characterized in that, The grooving direction of the positioning groove is perpendicular to the opening direction of the oral cavity.

10. The drilling and tapping fixture according to claim 7, characterized in that, Both the fixture body and the positioning seat are made of metal.

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