A modular drill jig

Abstract

The utility model relates to mechanical processing technical field, and disclose a combined drilling die, include: base, main drilling template is installed on the base through positioning structure, is used for the workpiece middle rear section and workpiece rear end of workpiece compression from above and positioning, auxiliary drilling template is connected with main drilling template through connecting structure, is used for positioning and clamping workpiece front end and workpiece middle front section, wherein, main drilling template with the auxiliary drilling template all inlay have the drill sleeve for guiding drill bit, the utility model carries out the multi -point, multidirectional spacing and clamping to special-shaped workpiece from vertical and horizontal two directions, and this combined positioning mode overcomes the clamping problem of workpiece special shape, realizes the quick, accurate and repeated positioning of workpiece, can dispense with the tedious step such as scribing, alignment, can directly drill after clamping, single piece processing time is greatly shortened, production efficiency is obviously improved, is applicable to batch production.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically a combined drilling mold. Background Technology

[0002] like Figure 5 The irregularly shaped workpiece shown includes a workpiece front end, a workpiece middle front section, a workpiece middle rear section, and a workpiece rear end connected in sequence. The workpiece middle rear section forms a gap between the workpiece middle front section and the workpiece rear end. In the subsequent processing of this type of workpiece, it is necessary to drill holes in the outer edge area of ​​the workpiece middle front section and the gap side surface of the workpiece middle rear section.

[0003] When drilling the aforementioned irregularly shaped workpieces, significant technical challenges are encountered. Due to the irregular external features of such workpieces, including gaps and multiple discontinuous surfaces, traditional three-jaw chucks or general-purpose fixtures are difficult to position them stably and accurately.

[0004] Currently, the machining of bolt holes and threaded holes on such workpieces mostly relies on manual marking by fitters and the use of simple drilling templates to determine the hole positions. This method is not only cumbersome and requires a high level of skill from workers, but also has low production efficiency and makes it difficult to guarantee the accuracy and consistency of hole positions, directly affecting the assembly quality and performance of the product.

[0005] Therefore, there is an urgent need in this field for a special tooling that can quickly and accurately position such irregularly shaped workpieces and guide the drill bit to complete precise drilling. Utility Model Content

[0006] To address the technical problems existing in the background art, this utility model proposes a combined drilling mold.

[0007] This utility model proposes a combined drilling mold, comprising: a base; a main drilling template, which is installed on the base via a positioning structure and is used to press and position the rear middle section and the rear end of the workpiece from above; and an auxiliary drilling template, which is connected to the main drilling template via a connecting structure and is used to position and clamp the front end and the front middle section of the workpiece; wherein, both the main drilling template and the auxiliary drilling template are inlaid with drill sleeves for guiding the drill bit. Addressing the challenges of "difficult positioning with traditional fixtures and low accuracy of manual scribing" in irregularly shaped workpieces with notches and multiple discontinuous surfaces, this mold achieves precise positioning through a "main-auxiliary drilling template combination." The base provides stable support for the overall structure, while the main drilling template clamps the middle and rear sections of the workpiece from above. The auxiliary drilling template clamps the front and middle sections, forming a multi-directional constraint of "up and down + front and back," preventing workpiece displacement during drilling. The drill bushing provides a fixed guide path for the drill bit, preventing it from deviating. This replaces traditional manual scribing for alignment, eliminating tedious operations, and is suitable for batch processing scenarios. At the same time, it ensures the consistency of hole positions between different workpieces, improves assembly interchangeability, and solves the industry pain points of poor drilling accuracy and low efficiency for irregularly shaped workpieces.

[0008] As a further optimization of this utility model, the positioning structure includes: two positioning columns symmetrically arranged on the base; a positioning rod fixedly installed on the upper end of the positioning columns; wherein, the two ends of the main drilling template are provided with sleeve holes adapted to the positioning rod, the main drilling template is fitted onto the positioning rod through the sleeve holes, and is pressed and fixed by a locking nut threadedly connected to the positioning rod; The positioning structure uses a "column-rod-sleeve hole" combination to ensure precise installation of the main drill template: the positioning column fixes the base, the positioning rod provides axial positioning, and the main drill template is quickly fitted through the sleeve hole without repeated position adjustments. After tightening the lock nut, the main drill template is pressed tightly to prevent drilling vibration from causing the template to loosen. At the same time, it ensures that the clamping force of the main drill template on the workpiece is stable, preventing the workpiece from moving vertically and providing a stable reference for subsequent drilling, which is suitable for high-frequency clamping requirements.

[0009] Furthermore, an adjustable support is provided on the base between the two positioning columns, and the adjustable support is used to support the rear middle section of the workpiece. The adjustable support supports the middle and rear section of the workpiece, making up for the support gap caused by the irregular structure of the workpiece, avoiding deformation of the middle section of the workpiece under stress. The support height is adjustable, which can adapt to the slight differences in the size of the workpiece, ensuring that the middle and rear section of the workpiece fits tightly with the lower surface of the main drill template. At the same time, it assists in the automatic centering of the workpiece, reduces the position deviation during clamping, further improves the positioning accuracy, and adapts to the slight dimensional fluctuations of different batches of workpieces.

[0010] Furthermore, the adjustable support includes a support rod and a support block. The upper end of the support block has an inwardly concave arc surface that matches the outer circular surface of the rear section of the workpiece. The support rod is a height-adjustable telescopic rod. The concave arc surface of the support block fits against the outer circular surface of the middle and rear section of the workpiece, increasing the contact area, improving support stability, and preventing excessive local stress on the workpiece that could cause damage. The telescopic support rod can be flexibly adapted to the support needs of different specifications of workpieces by adjusting its height. After extension and retraction, the position can be locked by fasteners to ensure stable support height that does not change with drilling vibration. It combines versatility and stability and is suitable for processing various specifications of irregularly shaped workpieces.

[0011] As a further optimization of this utility model, the connection structure is a locking bolt; one side of the auxiliary drilling template is provided with a slot that matches the free end of the front end of the workpiece, and the other side is provided with a through hole; the screw end of the locking bolt passes through the through hole, the front end of the workpiece and the inner cavity of the front middle section of the workpiece in sequence, and then connects with the threaded hole on the back of the main drilling template. The auxiliary drilling template quickly connects with the front end of the workpiece via a slot to achieve initial positioning. The locking bolt passes through the auxiliary drilling template and the inner cavity of the workpiece and is threadedly connected to the main drilling template, tightening the auxiliary drilling template and the main drilling template. At the same time, it clamps the front end and the middle front section of the workpiece from the horizontal direction to prevent the workpiece from moving horizontally. This connection method does not require additional fixtures, simplifies the clamping steps, and the bolt connection has strong rigidity, which can resist the radial force during drilling, ensuring the stability of the workpiece position and adapting to the complex clamping requirements of irregularly shaped workpieces.

[0012] As a further optimization of this utility model, at least one main drill sleeve is embedded on the main drill template. The main drill sleeve is a vertically arranged and vertically continuous cylindrical structure, and its position corresponds to the drilling position on the notch side end face of the middle rear section of the workpiece. The main drill bushing is vertically positioned and precisely aligned with the drilling position on the notch side face of the workpiece's middle rear section. This provides a vertical guide path for the drill bit, ensuring that the drill bit drills along the preset direction and preventing hole position offset caused by workpiece irregularities. The cylindrical structure runs vertically through the workpiece, not obstructing drill bit feed and retraction. It also protects the main drill template, preventing the drill bit from directly wearing down the template and extending the mold's service life. It is suitable for vertical end face drilling requirements.

[0013] As a further optimization of this utility model, at least one auxiliary drilling sleeve is embedded on the auxiliary drilling template. The auxiliary drilling sleeve is a horizontally arranged and horizontally connected cylindrical structure, and its position corresponds to the end of the workpiece's front middle section where the hole to be drilled is to be drilled. The auxiliary drill sleeve is horizontally positioned and aligned with the drilling position at the front end of the workpiece, providing horizontal guidance for the drill bit and ensuring the accuracy of the hole position in the horizontal direction. The cylindrical structure that runs through the left and right sides is suitable for the horizontal feed of the drill bit, while avoiding direct contact between the drill bit and the auxiliary drill template, reducing template wear. Multiple auxiliary drill sleeves can be used to process multiple sets of holes at the end of the workpiece, eliminating the need for frequent mold adjustments, improving processing efficiency, and meeting the needs of horizontal end drilling.

[0014] As a further optimization of this utility model, the front side of the main drill template is used to abut against the end face of the rear end of the workpiece to achieve the horizontal positioning of the workpiece. The front of the main drill template abuts against the rear end face of the workpiece, forming a horizontal reference surface that restricts the displacement of the workpiece along the feed direction. It works in conjunction with the horizontal clamping of the auxiliary drill template to form a "two-way" horizontal positioning, further eliminating the horizontal positional deviation of the workpiece. This positioning method does not require additional positioning pins, simplifying the structure. At the same time, it utilizes the main drill template's own structure to achieve positioning, improving the mold integration and reducing the number of parts.

[0015] As a further optimization of this utility model, both the main drilling template and the auxiliary drilling template are modular components that can be replaced according to the workpiece specifications. When processing different specifications of irregularly shaped workpieces, only the template of the corresponding size needs to be replaced, without replacing the base, positioning column and other basic components, which reduces the overall mold replacement cost. The template replacement is convenient and does not require readjustment of the basic positioning structure, which shortens the changeover time, adapts to the needs of multi-variety and small-batch production, improves the versatility of the mold, and reduces the development investment of special molds.

[0016] The combined drilling mold proposed in this utility model has the following beneficial effects: (i) Through the coordinated action of adjustable support components, positioning columns and rods, main drilling template and auxiliary drilling template and locking bolts, multi-point and multi-directional limiting and clamping of irregular workpieces are achieved from both vertical and horizontal directions. This combined positioning method overcomes the clamping difficulties caused by irregular workpiece shape, realizes rapid, accurate and repeatable positioning of workpieces, eliminates tedious steps such as scribing and alignment, and can directly drill holes after clamping. The processing time of a single piece is greatly shortened and the production efficiency is significantly improved, which is suitable for mass production. (ii) The drill bushings embedded in the main and auxiliary drill templates provide precise guidance for the drill bit. The drill bit drills strictly along the inner hole of the drill bushing, which effectively avoids the drill bit deviating, ensures the absolute accuracy of the hole position and the consistency of the hole position between each workpiece, and greatly improves product quality and assembly interchangeability. (iii) The mold adopts a modular design. The main drilling template and the auxiliary drilling template can be replaced or adjusted according to different specifications of workpieces. The adjustable support has the characteristic of height adjustment, which enables it to adapt to small changes in workpiece size and achieve automatic centering, thereby enhancing the versatility and applicability of the mold. (iv) The entire mold has a compact structure and sufficient rigidity, which can effectively suppress vibration during drilling and ensure processing stability. At the same time, the use of the drill bushing also protects the drill template and extends the service life of the mold. The standardized operating procedures also improve the safety of the operation.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 This is a front structural diagram of the present invention; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a side view sectional structural diagram of the present invention; Figure 4 This is a front sectional view of the main drill template of this utility model. Figure 5 This is a schematic diagram of the structure of a workpiece to be drilled using existing technology.

[0019] Figure descriptions: 1. Front end of workpiece; 2. Rear end of workpiece; 3. Front middle section of workpiece; 4. Rear middle section of workpiece; 5. Base; 6. Positioning column; 7. Positioning rod; 8. Main drill template; 9. Locking nut; 10. Support component; 11. Auxiliary drill template; 12. Locking bolt; 13. Main drill sleeve; 14. Auxiliary drill sleeve. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] Please see Figures 1-4 A combined drilling mold includes a base 5, a main drilling template 8, and an auxiliary drilling template 11; The upper end of the base 5 is equipped with a support member 10 for supporting the workpiece to be drilled. The height of the support member 10 is adjustable and it supports the lower surface of the middle rear section 4 of the workpiece. The upper end of the base 5 is equipped with positioning posts 6 symmetrically distributed on both sides of the support 10. Positioning rods 7 are installed on the upper end of the positioning posts 6. Both ends of the main drilling template 8 are provided with sleeve holes that are compatible with the positioning rods 7. The two ends of the main drilling template 8 are respectively fitted onto the two positioning rods 7 through the sleeve holes. The lower surface of the main drilling template 8 presses against the positioning posts 6 and the upper end face of the middle rear section 4 of the workpiece. The upper surface of the main drilling template 8 is locked by locking nuts 9 that are threaded onto the positioning rods 7. The end face of the rear end 2 of the workpiece near the middle rear section 4 of the workpiece is in contact with the front face of the main drilling template 8, thereby completing the vertical positioning of the workpiece to be drilled. A slot adapted to the free end of the front end 1 of the workpiece is provided on one side of the auxiliary drilling template 11. The auxiliary drilling template 11 is assembled by inserting it into the free end of the front end 1 of the workpiece through the slot. A through hole for the locking bolt 12 to pass through is also provided in the middle of the auxiliary drilling template 11. The screw end of the locking bolt 12 passes through the through hole and the inner cavity of the front end 1 and the front middle section 3 of the workpiece in sequence, and is threadedly connected to the reserved threaded hole on the back of the main drilling template 8. The nut end of the locking bolt 12 is in close contact with the other side of the auxiliary drilling template 11, thereby completing the horizontal positioning of the workpiece to be drilled. Combined with the vertical positioning, the quick positioning of the irregular workpiece is realized. Furthermore, two main drill sleeves 13 are inlaid on the main drill template 8, corresponding to the position of the notch side end face of the middle rear section 4 of the workpiece. The main drill sleeves 13 are vertically distributed and pass through the top and bottom. When drilling, the drill bit passes through the main drill sleeves 13 and performs drilling operations on the end face of the middle rear section 4 of the workpiece, thereby improving drilling accuracy and stability. Furthermore, two auxiliary drilling sleeves 14 are embedded at both the upper and lower ends of the auxiliary drilling template 11, corresponding to the upper and lower ends of the front section 3 of the workpiece. The auxiliary drilling sleeves 14 are horizontally distributed and pass through the left and right sides. When drilling, the drill bit passes through the auxiliary drilling sleeves 14 and performs drilling operations on both ends of the front section 3 of the workpiece, thereby improving drilling accuracy and stability.

[0023] In one embodiment, the support member 10 includes a support block and a support rod distributed vertically. The upper end of the support block has a concave arc surface that matches the curvature of the outer circular surface of the middle rear section 4 of the workpiece. The arc surface support improves the support stability of the middle rear section 4 of the workpiece. The support rod is a telescopic rod, and the telescopic connection is fastened with bolts. By adjusting the height of the telescopic rod, the support block supports the middle rear section 4 of the workpiece to contact the lower surface of the main drilling template 8, so that the workpiece can be automatically centered, thereby facilitating actual operation.

[0024] It should be noted that by changing and adjusting the main drill template 8 and the auxiliary drill template 11, it can be adapted to the processing of parts of different specifications, avoiding the trouble of manual scribing and effectively improving the processing efficiency of parts.

[0025] In summary, the working principle of this utility model is as follows: First, place the irregular workpiece on the base 5, so that the middle rear section 4 of the workpiece rests on the support block of the adjustable support 10. By adjusting the height of the support rod, the workpiece is moderately lifted until the upper end face of the middle rear section 4 of the workpiece is basically flush with or slightly lower than the upper end face of the positioning column 6. At the same time, the end face of the rear end 2 of the workpiece is roughly aligned with the installation position of the main drill template 8. The arc surface at the upper end of the support block helps the workpiece to automatically find the center. Then, align the holes at both ends of the main drill template 8 and fit them onto the positioning rods 7 on both sides, so that its lower surface can smoothly press against the upper end face of the positioning post 6 and the middle rear section 4 of the workpiece. At this time, the workpiece is restricted in the vertical direction between the base 5 and the main drill template 8. Then, tighten the locking nut 9 to firmly press the workpiece through the main drill template 8. Next, align the slot on the side of the auxiliary drilling template 11 with and insert it into the free end of the front end 1 of the workpiece. Then, insert the locking bolt 12 into the through hole on the outside of the auxiliary drilling template 11, so that its screw passes through the inner cavity of the front end 1 and the front section 3 of the middle part of the workpiece in sequence, and finally screws it into the threaded hole on the back of the main drilling template 8. Tighten the locking bolt 12, and its nut end presses against the auxiliary drilling template 11, thereby pulling the front part of the workpiece toward the main drilling template 8, completing the horizontal positioning and overall locking of the workpiece. Finally, after the workpiece is completely fixed, drilling can be performed. For the hole on the notch side end face of the rear section 4 of the middle of the workpiece, the drill bit is fed vertically downward along the main drill sleeve 13 on the main drill template 8. The drill sleeve guides the drill bit to drill accurately at the predetermined position. For the holes at the upper and lower ends of the front section 3 of the middle of the workpiece, the drill bit is fed horizontally along the auxiliary drill sleeve 14 on the auxiliary drill template 11. Similarly, the drill sleeve ensures the accuracy of the hole position. The use of the drill sleeve not only ensures the accuracy of the hole position, but also reduces the swing and wear of the drill bit, and improves the drilling quality and efficiency.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A combined drilling mold, characterized in that, include: Base (5); The main drill template (8) is installed on the base (5) through a positioning structure to press and position the middle rear section (4) and the rear end (2) of the workpiece from above. The auxiliary drilling template (11) is connected to the main drilling template (8) through a connecting structure and is used to position and clamp the front end (1) and the front middle section (3) of the workpiece. Both the main drilling template (8) and the auxiliary drilling template (11) are inlaid with drill sleeves for guiding the drill bit.

2. The combined drilling mold according to claim 1, characterized in that, The positioning structure includes: Two positioning posts (6) are symmetrically arranged on the base (5); A positioning rod (7) is fixedly installed on the upper end of the positioning column (6); The main drilling template (8) has sleeve holes at both ends that are adapted to the positioning rod (7). The main drilling template (8) is fitted onto the positioning rod (7) through the sleeve holes and is pressed and fixed by the locking nut (9) that is threadedly connected to the positioning rod (7).

3. A combined drilling mold according to claim 2, characterized in that, An adjustable support (10) is provided on the base (5) between the two positioning columns (6), and the adjustable support (10) is used to support the middle rear section (4) of the workpiece.

4. A combined drilling mold according to claim 3, characterized in that, The adjustable support (10) includes a support rod and a support block. The upper end of the support block has an inwardly concave arc surface that matches the outer circular surface of the middle rear section (4) of the workpiece. The support rod is a height-adjustable telescopic rod.

5. A combined drilling mold according to claim 1, characterized in that, The connection structure is a locking bolt (12); The auxiliary drilling template (11) has a slot on one side that matches the free end of the front end (1) of the workpiece, and a through hole on the other side. The screw end of the locking bolt (12) passes through the inner cavity of the through hole, the front end (1) of the workpiece and the front middle section (3) of the workpiece in sequence, and is connected to the threaded hole on the back of the main drilling template (8).

6. A combined drilling mold according to claim 1, characterized in that, At least one main drill sleeve (13) is inlaid on the main drill template (8). The main drill sleeve (13) is a vertically arranged and vertically connected cylindrical structure, and its position corresponds to the drilling position on the notch side end face of the middle rear section (4) of the workpiece.

7. A combined drilling mold according to claim 1, characterized in that, At least one auxiliary drill sleeve (14) is embedded on the auxiliary drill template (11). The auxiliary drill sleeve (14) is a horizontally arranged and horizontally connected cylindrical structure, and its position corresponds to the end of the front section (3) of the workpiece to be drilled.

8. A combined drilling mold according to claim 1, characterized in that, The front side of the main drill template (8) is used to abut against the end face of the rear end (2) of the workpiece to achieve horizontal positioning of the workpiece.

9. A combined drilling mold according to any one of claims 1-8, characterized in that, Both the main drilling template (8) and the auxiliary drilling template (11) are modular components that can be replaced according to the workpiece specifications.

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