A drill jig tool for processing and positioning a rear frame

Abstract

This utility model discloses a drilling jig fixture for rear frame machining and positioning, comprising: a main beam, on which an engine positioning crossbeam, a first radiator positioning crossbeam, a second radiator positioning crossbeam, and a hood hole positioning crossbeam are disposed, all perpendicular to the main beam in a plane; a first vertical beam is disposed between the main beams, the first and second radiator positioning crossbeams are disposed below the ends of the main beams, and the length of the second vertical beam is greater than that of the first vertical beam; the hood hole positioning crossbeam is disposed on the upper surface of the other end of the main beam; engine mounting hole positioning plates are disposed at both ends of the engine positioning crossbeam, radiator fixing hole positioning plates are disposed at both ends of the first and second radiator positioning crossbeams, and hood mounting hole positioning plates are disposed at both ends of the hood hole positioning crossbeam. This solves the problem of low accuracy due to inconsistent drill bit references and the high cost of specialized machining production line equipment.

Description

Technical Field

[0001] This utility model belongs to the field of mold tooling technology, specifically relating to a drilling jig tooling for rear frame machining and positioning. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] In the field of machine tool processing, the machining of multiple hole systems has always been a key step in the manufacturing of structural components, especially for complex welded structural components such as vehicle frames, which have a significant impact on the accuracy, strength, and assembly reliability. Traditional machining methods mainly include two approaches: First, a combination of radial drilling machines and dedicated drilling jigs is used to process different hole systems step-by-step using multiple independently designed jigs. This reduces equipment investment costs to some extent, but because the design and positioning references of the drilling jigs for each hole system are not unified, especially when the workpiece structure is complex and the number of holes is large, inconsistencies in the references can easily lead to cumulative errors, resulting in increased hole position deviations. Second, centralized machining relies on large CNC machine tools or external machining centers. This can ensure the consistency and accuracy of hole system machining, but it requires reliance on large CNC equipment or outsourcing to machining centers, incurring high purchase and maintenance costs and significantly increasing the cost per unit. Although it is highly adaptable to different types of workpieces, for specialized machining production lines with little variation in model specifications, machining with large CNC machine tools or external machining centers will place a significant cost burden on enterprises. Summary of the Invention

[0004] To address the aforementioned issues, this utility model provides a drilling jig fixture for rear frame machining and positioning, which solves the problem of low precision caused by cumulative errors due to inconsistent references in traditional production methods, as well as the problem of high equipment costs in specialized machining production lines in order to improve machining accuracy.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: This utility model provides a drilling jig fixture for machining and positioning a rear frame, comprising: a main beam, on which an engine positioning crossbeam, a first radiator positioning crossbeam, a second radiator positioning crossbeam, and a hood hole positioning crossbeam are provided, all of which are perpendicular to the main beam in a plane; the engine positioning crossbeam is located below the middle of the main beam, and a first vertical beam is provided between it and the main beam; the second radiator positioning crossbeam is located below the end of the main beam, and a second vertical beam is provided between it and the main beam, the length of the second vertical beam being greater than that of the first vertical beam; the first radiator positioning crossbeam is located between the engine positioning crossbeam and the second radiator positioning crossbeam, and is fixedly connected to the lower surface of the main beam; the hood hole positioning crossbeam is located on the upper surface of the other end of the main beam; engine mounting hole positioning plates are provided at both ends of the engine positioning crossbeam, radiator fixing hole positioning plates are provided at both ends of the first and second radiator positioning crossbeams, and hood mounting hole positioning plates are provided at both ends of the hood hole positioning crossbeam.

[0006] As a further implementation, the main beam, engine positioning beam, first radiator positioning beam, second radiator positioning beam, and hood hole positioning beam are square steel pipes of different sizes and specifications.

[0007] As a further implementation, two first stiffening plates are fixedly installed between the main beam and the engine positioning crossbeam, with the two first stiffening plates arranged on both sides of the main beam.

[0008] As a further implementation, the engine mounting hole positioning plate is fixedly connected to the lower surface of the end of the engine positioning crossbeam, and a positioning shaft is inserted into the engine mounting hole positioning plate, with a positioning shaft sleeve provided between the positioning shaft and the engine mounting hole positioning plate.

[0009] As a further implementation, the radiator fixing hole positioning plate includes a first positioning plate, a second positioning plate, and a third positioning plate, all of which are rectangular; the first positioning plate and the second positioning plate are disposed at both ends of the first radiator positioning beam, and the third positioning plate is disposed at both ends of the second radiator positioning beam.

[0010] As a further implementation, one end of the first positioning plate is provided with two first positioning holes, and the center line connecting the two first positioning holes is perpendicular to the length direction of the first positioning plate; the other end of the first positioning plate is fixedly connected to the first radiator positioning beam; one end of the second positioning plate is provided with two second positioning holes, and the center line connecting the two second positioning holes is parallel to the length direction of the second positioning plate.

[0011] As a further implementation, one end of the third positioning plate is provided with two third positioning holes, the center line connecting the two third positioning holes is perpendicular to the length direction of the third positioning plate, and a fourth positioning hole is provided at the middle position of the other end of the third positioning plate. The middle part of the third positioning plate is fixedly connected to the second radiator positioning beam. Drill sleeves can be detachably installed in the first positioning hole, the second positioning hole, the third positioning hole and the fourth positioning hole.

[0012] As a further implementation, a second stiffening plate is fixedly installed between the first radiator positioning beam and the main beam, and a third stiffening plate is fixedly installed between the main beam and the second radiator positioning beam, with the third stiffening plate distributed on both sides of the main beam.

[0013] As a further implementation, a hoisting plate is fixedly installed on the top of the main beam.

[0014] As a further implementation, there are two machine hood hole positioning beams, and the machine hood mounting hole positioning plate consists of a horizontal plate and two mounting ear plates. The horizontal plate has multiple fifth positioning holes along its length. One end of the mounting ear plate is fixedly connected to the horizontal plate, and the other end is fixedly connected to the end of the machine hood hole positioning beam.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are: This invention establishes an extremely stable frame system by setting the engine positioning crossbeam as a rigid reference. The remaining first radiator positioning crossbeam, second radiator positioning crossbeam, and hood hole positioning crossbeam are all connected to the main beam via vertical beams. Drilling under the guidance of this fixture is less prone to skewing, vibration, or drift, thus ensuring the verticality and positional accuracy of each hole. The use of different sizes for the vertical beams compensates for structural differences or curvatures in the rear frame, ensuring that all positioning plates perfectly fit the corresponding mounting surfaces of the rear frame. If the fit is not tight, slight displacement or vibration will occur during drilling, directly leading to out-of-tolerance hole positions. The engine holes, radiator holes, and hood holes are all integrated into a rigid, single-piece fixture, completing machining or positioning in one operation. This avoids the cumulative errors caused by moving the workpiece multiple times and machining these hole systems separately on different equipment, ensuring the relative positional accuracy between the holes. This solution addresses the problem of traditional methods requiring multiple positioning, clamping, and hoisting of workpieces to process holes in different locations. The fixture allows for the processing or positioning welding of all critical holes with a single workpiece clamping, eliminating the need for repeated measurements, scribing, and trial drilling. Drilling can be performed directly using the existing guide sleeves on the fixture, simplifying the operation process and reducing reliance on the operator's skill level. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0017] Figure 1 This is a structural diagram of the drilling jig tooling for machining and positioning the rear frame of this utility model.

[0018] In the diagram: 1. Main beam; 2. Engine positioning crossbeam; 3. First radiator positioning crossbeam; 4. Second radiator positioning crossbeam; 5. First vertical beam; 6. First stiffening plate; 7. Second vertical beam; 8. Second stiffening plate; 9. Third stiffening plate; 10. Hood hole positioning crossbeam; 11. Engine mounting hole positioning plate; 12. Positioning shaft; 13. Positioning bushing; 14. First positioning plate; 15. First positioning hole; 16. Second positioning plate; 17. Second positioning hole; 18. Third positioning plate; 19. Third positioning hole; 20. Fourth positioning hole; 21. Hood mounting hole positioning plate; 22. Fifth positioning hole. Detailed Implementation

[0019] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly indicated by the present invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. Example 1 This embodiment discloses a drilling jig fixture for machining and positioning the rear frame, such as... Figure 1As shown, it includes: a main beam 1, and an engine positioning crossbeam 2, a first radiator positioning crossbeam 3, a second radiator positioning crossbeam 4, and a hood hole positioning crossbeam 10 that are perpendicular to each other in the plane of the main beam 1; the engine positioning crossbeam 2 is located below the middle of the main beam 1, and a first vertical beam 5 is provided between it and the main beam 1; the second radiator positioning crossbeam 4 is located below the end of the main beam 1, and a second vertical beam 7 is provided between it and the main beam 1, the length of the second vertical beam 7 being greater than that of the first vertical beam 5; the first radiator positioning crossbeam 3 is located between the engine positioning crossbeam 2 and the second radiator hole positioning crossbeam 10. The positioning crossbeams 4 are fixedly connected to the lower surface of the main beam 1; the hood hole positioning crossbeam 10 is located on the upper surface of the other end of the main beam 1; the two ends of the engine positioning crossbeam 2 are provided with engine mounting hole positioning plates 11, the two ends of the first radiator positioning crossbeam 3 and the second radiator positioning crossbeam 4 are provided with radiator fixing hole positioning plates, and the two ends of the hood hole positioning crossbeam 10 are provided with hood mounting hole positioning plates 21; the width, length and thickness of the engine mounting hole positioning plate 11, the radiator fixing hole positioning plate and the hood mounting hole positioning plate 21 are all set according to the actual application requirements.

[0021] By setting the engine positioning beam 2 as a rigid reference, the remaining first radiator positioning beam 3, second radiator positioning beam 4, and hood hole positioning beam 10 are all connected to the main beam 1 via vertical beams, forming an extremely stable frame system. Drilling under the guidance of this fixture is less prone to skewing, vibration, or drift, thus ensuring the verticality and positional accuracy of each hole. The use of vertical beams of different sizes compensates for structural differences or curvatures in the rear frame itself, ensuring that all positioning plates perfectly fit the corresponding mounting surfaces of the rear frame. If the fit is not tight, slight displacement or vibration will occur during drilling, directly leading to out-of-tolerance hole positions. The engine holes, radiator holes, and hood holes are all integrated into a rigid, single-piece fixture for machining or positioning in one operation. This avoids the cumulative errors caused by moving the workpiece multiple times and machining these hole systems separately on different equipment, ensuring the relative positional accuracy between the holes. This solution addresses the problem of traditional methods requiring multiple positioning, clamping, and hoisting of workpieces to process holes in different locations. The fixture allows for the processing or positioning welding of all critical holes with a single workpiece clamping, eliminating the need for repeated measurements, scribing, and trial drilling. Drilling can be performed directly using the existing guide sleeves on the fixture, simplifying the operation process and reducing reliance on the operator's skill level.

[0022] As a further implementation, the main beam 1, engine positioning beam 2, first radiator positioning beam 3, second radiator positioning beam 4, and hood hole positioning beam 10 are square steel pipes of different sizes. In this embodiment, to avoid deformation of the drill jig due to its own weight during use and hoisting, the main beam 1 is preferably made of 100×100 mm square tubing, and the other beams are preferably made of 80x80 mm square tubing.

[0023] As a further implementation, two first stiffening plates 6 are fixedly installed between the main beam 1 and the engine positioning crossbeam 2, with the two first stiffening plates 6 arranged on both sides of the main beam 1.

[0024] As a further implementation, the engine mounting hole positioning plate 11 is fixedly connected to the lower surface of the end of the engine positioning crossbeam 2, and a positioning shaft 12 is inserted into the engine mounting hole positioning plate 11. A positioning bushing 13 is provided between the positioning shaft 12 and the engine mounting hole positioning plate 11. It can be understood that the positioning shaft 12 can be directly inserted into the engine mounting hole. Since the positions of the other crossbeams are relatively fixed, the positioning accuracy on each positioning plate is guaranteed. By setting the positioning bushing 13, it is easy to replace the positioning shaft 12 and avoid the positioning shaft 12 from being severely worn during use, which would lead to a decrease in positioning accuracy.

[0025] As a further implementation, the radiator fixing hole positioning plate includes a first positioning plate 14, a second positioning plate 16 and a third positioning plate 18, all of which are rectangular; the first positioning plate 14 and the second positioning plate 16 are disposed at both ends of the first radiator positioning beam 3, and the third positioning plate 18 is disposed at both ends of the second radiator positioning beam 4.

[0026] As a further implementation, one end of the first positioning plate 14 is provided with two first positioning holes 15, and the center line connecting the two first positioning holes 15 is perpendicular to the length direction of the first positioning plate 14. The other end of the first positioning plate 14 is fixedly connected to the first radiator positioning beam 3. One end of the second positioning plate 16 is provided with two second positioning holes 17, and the center line connecting the two second positioning holes 17 is parallel to the length direction of the second positioning plate 16.

[0027] As a further implementation, one end of the third positioning plate 18 is provided with two third positioning holes 19, and the center line connecting the two third positioning holes 19 is perpendicular to the length direction of the third positioning plate 18. A fourth positioning hole 20 is provided at the middle position of the other end of the third positioning plate 18. The middle part of the third positioning plate 18 is fixedly connected to the second radiator positioning beam 4. Drill bushings can be detachably provided in the first positioning hole 15, the second positioning hole 17, the third positioning hole 19 and the fourth positioning hole 20. The inner diameter of the drill bushing is larger than the size of the machining tool, but the difference between the inner diameter of the drill bushing and the size of the machining tool should meet the error specified by the positioning accuracy, so as to avoid the inner diameter of the drill bushing being too large, which would cause the hole drilled on the frame to have too large an error and lead to assembly difficulties.

[0028] As a further implementation, a second stiffening plate 8 is fixedly installed between the first radiator positioning beam 3 and the main beam 1, and a third stiffening plate 9 is fixedly installed between the main beam 1 and the second radiator positioning beam 4. The third stiffening plate 9 is distributed on both sides of the main beam 1. Its purpose is to ensure that the stress concentration generated during the welding process is prevented by installing connecting square tubes and adding connecting square tubes, since the radiator fixing plate is too far away from the main beam 1.

[0029] As a further implementation, a lifting plate is fixedly installed on the top of the main beam 1, which can be used to transfer the entire tooling in the processing workshop using lifting equipment, avoiding manual lifting and improving processing efficiency.

[0030] As a further implementation, there are two machine hood hole positioning beams 10, and the machine hood mounting hole positioning plate 21 is composed of a horizontal plate and two mounting ear plates. The horizontal plate is provided with a plurality of fifth positioning holes 22 along the length direction. One end of the mounting ear plate is fixedly connected to the horizontal plate, and the other end is fixedly connected to the end of the machine hood hole positioning beam 10.

[0031] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A drill jig tool for rear frame machining positioning, characterized in that, include: The main beam includes an engine positioning crossbeam, a first radiator positioning crossbeam, a second radiator positioning crossbeam, and a hood hole positioning crossbeam, all perpendicular to the main beam in a plane. The engine positioning crossbeam is located below the middle of the main beam and is connected to a first vertical beam. The second radiator positioning crossbeam is located below the end of the main beam and is connected to a second vertical beam, the length of which is greater than that of the first vertical beam. The first radiator positioning crossbeam is located between the engine positioning crossbeam and the second radiator positioning crossbeam and is fixedly connected to the lower surface of the main beam. The hood hole positioning crossbeam is located on the upper surface of the other end of the main beam. Engine mounting hole positioning plates are provided at both ends of the engine positioning crossbeam, radiator fixing hole positioning plates are provided at both ends of the first and second radiator positioning crossbeams, and hood mounting hole positioning plates are provided at both ends of the hood hole positioning crossbeam.

2. A drill jig tool for machining and positioning a rear frame as claimed in claim 1, characterized in that, The main beam, engine positioning beam, first radiator positioning beam, second radiator positioning beam, and hood hole positioning beam are square steel pipes of different sizes and specifications.

3. The drilling jig fixture for rear frame machining and positioning as described in claim 1, characterized in that, Two first stiffening plates are fixedly installed between the main beam and the engine positioning crossbeam, and the two first stiffening plates are arranged on both sides of the main beam.

4. The drilling jig fixture for rear frame machining and positioning as described in claim 3, characterized in that, The engine mounting hole positioning plate is fixedly connected to the lower surface of the end of the engine positioning crossbeam, and a positioning shaft is inserted into the engine mounting hole positioning plate, with a positioning shaft sleeve provided between the positioning shaft and the engine mounting hole positioning plate.

5. The drilling jig fixture for rear frame machining and positioning as described in claim 1, characterized in that, The radiator fixing hole positioning plate includes a first positioning plate, a second positioning plate, and a third positioning plate, all of which are rectangular; the first positioning plate and the second positioning plate are located at both ends of the first radiator positioning beam, and the third positioning plate is located at both ends of the second radiator positioning beam.

6. The drilling jig fixture for rear frame machining and positioning as described in claim 5, characterized in that, One end of the first positioning plate is provided with two first positioning holes, and the center line connecting the two first positioning holes is perpendicular to the length direction of the first positioning plate. The other end of the first positioning plate is fixedly connected to the first radiator positioning beam. One end of the second positioning plate is provided with two second positioning holes, and the center line connecting the two second positioning holes is parallel to the length direction of the second positioning plate.

7. The drilling jig fixture for rear frame machining and positioning as described in claim 6, characterized in that, Two third positioning holes are provided at one end of the third positioning plate, and the line connecting the centers of the two third positioning holes is perpendicular to the length direction of the third positioning plate. A fourth positioning hole is provided at the middle position of the other end of the third positioning plate. The middle part of the third positioning plate is fixedly connected to the second radiator positioning beam. Drill sleeves can be detachably installed in the first positioning hole, the second positioning hole, the third positioning hole and the fourth positioning hole.

8. The drilling jig fixture for machining and positioning a rear frame as described in claim 1, characterized in that, A second stiffening plate is fixedly installed between the first radiator positioning beam and the main beam, and a third stiffening plate is fixedly installed between the main beam and the second radiator positioning beam. The third stiffening plate is distributed on both sides of the main beam.

9. The drilling jig fixture for machining and positioning the rear frame as described in claim 1, characterized in that, A hoisting plate is fixedly installed on the top of the main beam.

10. The drilling jig fixture for rear frame machining and positioning as described in claim 1, characterized in that, There are two machine hood hole positioning beams. The machine hood mounting hole positioning plate consists of a horizontal plate and two mounting ear plates. The horizontal plate has multiple fifth positioning holes along its length. One end of the mounting ear plate is fixedly connected to the horizontal plate, and the other end is fixedly connected to the end of the machine hood hole positioning beam.

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