CN211638413U - Auxiliary tool for drilling and riveting of chassis boundary beam and casting - Google Patents

Abstract

The utility model provides an auxiliary tool for drilling and riveting between the edge beam of the chassis frame and the casting, and proposes a new auxiliary tool for drilling and riveting, so as to solve the problem of riveting processing of the edge beam and the casting of the aluminum alloy chassis in a targeted manner, so as to realize a It is a drilling riveting process with strong practicability, high drilling accuracy and high processing efficiency, which effectively solves the problem that the existing underframe side beams are difficult to drill accurately and the product quality is unstable after riveting, and reduces the intensity of on-site processing work and Increase productivity. Auxiliary tooling includes pallets, F-type clip bars, support frames, positioning support blocks and magnetic drills. The support plate has a flat plate-like structure, the cross-sectional shape of the support frame is L-shape, and the positioning support block has at least two continuous T-shape structures that are connected as a whole. The support frame is provided with a through groove with a rectangular cross-section between the two right-angle folded edges, and the outer edge of the side beam abuts into the through groove.

Description

Auxiliary tool for drilling and riveting of underframe side beams and castings

technical field

The utility model relates to an auxiliary tool which is suitable for drilling and riveting processing of an underframe side beam and a casting of an aluminum alloy EMU, and belongs to the field of rail vehicle design.

Background technique

With the rapid development of EMU technology and the improvement of train running speed, the structure design and assembly process of the car body have been continuously optimized and improved, and the structure design of the car body has become more and more mature.

As one of the important parts of the aluminum alloy car body, the underframe is directly connected to the bogie and plays a pivotal role in connection and load distribution. The important accessory on the side beam, the precise positioning size of the anti-rolling mount, will directly affect the quality and safety of the car body. higher requirements.

The side beam attachment of the existing aluminum alloy car body, the anti-rolling mount, is an aluminum alloy structure directly welded on the side beam. It is difficult to adjust and repair due to the influence of welding deformation factors, and it is difficult to ensure the dimensional tolerance requirements. The relatively new and improved design is to change the anti-rolling mounting seat from an aluminum alloy structure to a casting structure, and use on-site manual drilling to fix the casting on the side beam by rivets. Therefore, the design structure of the side beam, the anti-rolling mounting seat The installation space location and manual drilling and other human uncertain factors directly determine the difficulty and accuracy of drilling on-site drilling.

For example, in a certain type of aluminum alloy urban rail train currently designed and used by the applicant, the anti-rolling mounting seat is a casting structure, and the side beam structure and the spatial position of the anti-rolling mounting seat make it difficult to clamp the anti-rolling mounting seat on site. Fixed; at the same time, affected by human uncertain factors such as the space installation position of the anti-rolling mounting seat and manual operation, on the one hand, the size of the aluminum alloy side beam profile with the drill hole is difficult to meet the tolerance size requirements required for riveting, that is, the drill hole cannot be guaranteed. Hole accuracy; on the other hand, manual on-site drilling has high work intensity and low production efficiency; in addition, the unreasonable riveting process steps will increase the difficulty of riveting, which is easy to cause loosening of rivets or gaps in the contact surface between castings and edge beams, which cannot guarantee product quality. .

In view of this, this application is hereby made.

Utility model content

The auxiliary tooling for drilling and riveting between the edge beam of the underframe and the casting of the utility model is designed to solve the problems existing in the prior art and propose a new auxiliary tooling for drilling and riveting, so as to solve the problem of aluminum alloys in a targeted manner. The problem of riveting processing between the edge beam of the chassis and the casting is expected to realize a drilling and riveting process with strong practicability, high drilling accuracy and high processing efficiency, and effectively solve the difficulty of accurate drilling and riveting of the existing edge beam of the chassis. After the problem of unstable product quality, reduce the intensity of on-site processing work and improve production efficiency.

In order to achieve the above design purpose, the present application proposes a new auxiliary tool for drilling and riveting the side beam of the underframe and the casting, which mainly includes a pallet, an F-type clip, a support frame, a positioning support block and a magnetic drill.

Wherein, the support plate has a plate-like structure, the cross-sectional shape of the support frame is L-shaped, and the positioning support block has at least two continuous T-shaped structures connected as one.

Further, an optimization and improvement solution that can be adopted is that a through groove with a rectangular cross-section is arranged between the two right-angle folded edges of the support frame, and the outer edge of the side beam abuts into the through groove.

The specific drilling and riveting positioning structure is as follows: at the lower surface of the side beam, the supporting plate and the casting are respectively located on the lower surface of the side beam, and the magnetic drill is located on the supporting plate; at least one F-shaped clip is clamped and fixed on the supporting plate. At the vertical ends of the upper surface of the board and the lower surface of the side beam, at least one F-type clip is clamped at the vertical ends of the casting and the lower surface of the side beam;

At the inner slope of the side beam, the positioning support block and the casting are respectively located on the inner slope of the side beam, the magnetic drill is located on the positioning support block, and the support frame is located on the outer edge of the lower surface of the side beam; at least one F-type clip clamps It is fixed between the upper surface of the positioning support block and the vertical direction of the bottom surface of the supporting frame, and at least one F-shaped clip is clamped between the vertical ends of the casting and the bottom surface of the supporting frame.

For example, the structural design and positioning connection method of the above-mentioned auxiliary tooling are designed according to the structural characteristics of the side beams and castings. It can flexibly convert the magnetic drill to locate the datum reference plane, and use the inner slope of the side beam and the lower surface of the side beam as the positioning datum plane. , the positioning support block is designed parallel to the inner slope of the side beam, the pallet is designed parallel to the lower surface of the side beam, and the castings are clamped and positioned in the lateral and vertical directions respectively, which provides the necessary prerequisites for the accuracy of mechanical drilling.

The structural design of the positioning support block is based on the structure of the side beam and the shape and size characteristics of the casting to avoid interference with the casting, and to meet the travel requirements of the magnetic drill mechanical drilling at the inner slope of the side beam. It can guarantee the requirements of positional dimensional tolerances such as flatness and verticality as a whole, and ensure the accuracy of the drilled holes.

Based on the application of the above-mentioned auxiliary tool for drilling and riveting the edge beam of the chassis and the casting, the present application simultaneously proposes an improved riveting process method. The following implementation steps are included:

(1) Rivet pull riveting process test;

(2) Scribing the edge beam to locate the size of the casting;

(3) Drilling positioning holes and pulling riveting positioning of the aluminum profile on the lower surface of the side beam to match the rivet hole of the casting;

(4) Drilling positioning holes and pulling riveting positioning for matching casting rivet holes to the inner sloped aluminum profile of the side beam;

(5) Match the rivet hole of the casting to drill and rivet the rest of the aluminum profile of the side beam.

Further, before the riveting of the physical product, the riveting process test is performed on the rivet to verify the process verification of the equipment capability of the rivet gun and the quality of the rivet.

Further, a magnetic drill is used to match the rivet holes of the casting to mechanically drill the side beam profiles.

Use auxiliary tooling to carry out the following drilling and riveting positioning respectively. At the lower surface of the side beam, the supporting plate and casting are respectively located on the lower surface of the side beam, and the magnetic drill is located on the supporting plate; at least one F-type clip is clamped and fixed. On the vertical ends of the upper surface of the pallet and the lower surface of the side beam, at least one F-shaped clip is clamped at the vertical ends of the casting and the lower surface of the side beam;

At the inner slope of the side beam, the positioning support block and the casting are respectively located on the inner slope of the side beam, the magnetic drill is located on the positioning support block, and the support frame is located on the outer edge of the lower surface of the side beam; at least one F-type clip clamps It is fixed between the upper surface of the positioning support block and the vertical direction of the bottom surface of the supporting frame, and at least one F-shaped clip is clamped between the vertical ends of the casting and the bottom surface of the supporting frame.

To sum up, the advantages of the auxiliary tooling used for drilling and riveting the edge beam of the underframe and the casting of the present application are:

1. According to the structural characteristics of the side beams and castings of the existing aluminum alloy EMUs, the proposed drilling and riveting auxiliary tool can flexibly convert the magnetic drill positioning datum reference plane, and use the inner slope and lower surface of the side beam as the positioning datum plane respectively. , which provides the necessary prerequisites for the accuracy of mechanical drilling, and the auxiliary tooling is practical and flexible.

2. The magnetic drill is used to match the rivet holes of the castings to mechanically drill the side beam profiles. Compared with the previous manual drilling, it avoids the influence of external uncertain interference factors, ensures the accuracy of drilling, and reduces the work intensity. Significantly improve production efficiency and ensure product quality.

3. The improved drilling and riveting process of the edge beam and castings clearly defines the operation steps of drilling and riveting, which greatly ensures the quality of the product and avoids the rework after the riveting of the physical product.

Description of drawings

Fig. 1 is the position and structure schematic diagram of underframe side beam and casting assembly processing;

Fig. 2 is the process flow diagram of drilling and riveting the side beam and the casting;

Fig. 3 is the schematic diagram of rivet process test;

Fig. 4 is the schematic diagram of the bottom surface of underframe side beam and casting drilling riveting;

Fig. 5 is the A-A sectional schematic diagram of Fig. 4;

Figure 6 is a schematic diagram of the riveting of the inner inclined surface of the side beam of the underframe and the drilling hole of the casting;

Fig. 7 is the B-B sectional schematic diagram of Fig. 6;

Fig. 8 is the structural comparison schematic diagram of the support frame and the positioning support block;

Detailed ways

The present utility model will be described in further detail below in conjunction with the accompanying drawings.

Example 1, taking as an example the drilling and riveting processing of the aluminum alloy underframe side beam and the anti-rolling mounting seat casting of the intercity rail vehicle.

As shown in FIG. 1 , at the near end of the side beam 10 on one side of the base frame (the figure shows the corbel 60 constituting the base frame and the floor 70 installed on the base frame), the anti-roll mounting seat 20 is passed through rivets 30 are respectively installed and fixed on the lower surface 40 of the side beam and the inner inclined surface 50 of the side beam.

The structure of the side beam 10 is nearly cylindrical and irregular in shape, and the anti-rolling mounting seat 20 adopts the integral machining method to ensure the standard requirements of the position size and tolerance of the machined rivet hole, the flatness of the casting, and the angle of the casting.

The number of rivet holes located on the lower surface 40 of the side beam is 8, and the number of rivet holes located on the inner slope 50 of the side beam is 6.

In order to realize the machining accuracy requirements of the above-mentioned underframe side beams and the anti-rolling mounting seat drilling and riveting, the auxiliary tooling described in this application mainly includes a pallet 3, an F-type clip 4, a support frame 6, a positioning support block 7 and Magnetic Drill 8.

Wherein, the support plate 3 has a flat plate structure;

As shown in FIG. 8 , the cross-sectional shape of the support frame 6 is L-shaped, and a rectangular through slot 61 with a cross-section of 4 mm ² is set between the two right-angle folds, and the support frame 6 is cushioned on the edge of the side beam 10 When it is outside, the outer edge of the side beam 10 abuts into the through groove 61;

The positioning support block 7 preferably has at least two continuous T-shaped structures that are connected as a whole.

As shown in FIG. 4 and FIG. 5 , at the lower surface 40 of the side beam, the above-mentioned auxiliary tooling is applied, the supporting plate 3 and the anti-rolling mounting seat 20 are respectively located on the lower surface 40 of the side beam, and the magnetic drill 8 is located on the supporting plate. 3; two F-type clips 4 are clamped and fixed on the vertical ends of the upper surface of the pallet 3 and the lower surface 40 of the side beam, and the other two F-type clips 4 are clamped on the anti-rolling mounting seat 20 and the side beam. The vertical ends of the lower surface 40 of the beam.

As shown in FIG. 6 and FIG. 7 , at the inner slope 50 of the side beam, the above-mentioned auxiliary tooling is applied, the positioning support block 7 and the anti-rolling mounting seat 20 are respectively located on the inner slope 50 of the side beam, and the magnetic drill 8 is located at the positioning On the support block 7, the support frame 6 is located at the outer edge of the lower surface of the side beam 10; the two F-shaped clip bars 4 are clamped and fixed between the upper surface of the positioning support block 7 and the vertical direction of the bottom surface of the support frame 6, and the other F The clip rails 4 are clamped on the vertical ends of the anti-rolling mounting seat 20 and the bottom surface of the supporting frame 6 .

As shown in FIG. 2 , the casting riveting process method applied to the edge beam 10 of the aluminum alloy chassis and the anti-rolling mounting seat 20 includes the following implementation steps:

Clean and paint the riveted area of the side beam, and continue the post-process operation after the paint is dry;

Carry out the rivet process test, as shown in Figure 3, in order to verify the equipment capability of the rivet gun 80 and the quality of the rivet 30, it is necessary to simulate the physical product to carry out the riveting test. Casting material and wall thickness, and pre-machined rivet holes according to the size required for riveting according to test plate 1 and test plate 2, and then use a rivet gun to pull riveting after the two test plates are closely fixed; after the riveting test is completed , Mark the vehicle number, time, operator and other information on the test plate, which is convenient for product quality traceability, and the rivet appearance and size inspection are qualified before the formal product riveting operation;

On the side beam 10, the anti-rolling mounting seat 20 is positioned and dimensioned according to the size of the drawing, and at the same time, the spacing size of the anti-rolling mounting seat casting is adjusted through the gasket according to the width of the chassis;

Match the rivet holes of the casting to drill positioning holes for the aluminum profiles on the lower surface 40 of the side beam. As shown in Figure 5, place the anti-rolling mounting seat 20 on the lower surface 40 of the side beam according to the positioning size, and use two F clips 4 to fix it. Clamp and fix in the vertical direction; place the machined pallet 3 on the lower surface 40 of the side beam close to the casting, and clamp and fix it in the vertical direction with 2 F clip bars 4; place the magnetic drill 8 Place it on the pallet 3, and under the action of electromagnetic force after electrification, the magnetic drill 8 is adsorbed on the surface of the pallet 3 to complete the two rivet holes in the lower surface 40 area of the side beam shown in FIG. 1; then, in the F card The riveting operation of the positioning hole on the lower surface 40 of the side beam is carried out in the clamped state of the column 4. After the positioning riveting is completed, all the F clips 4 clamped on the lower surface 40 of the side beam are disassembled;

Drill positioning holes for the rivet holes on the inner slope 50 of the side beam to match the aluminum profile of the side beam. As shown in Figure 7, firstly under the action of the positioning support block 7 and the F clip 4, the anti-rolling surface 50 attached to the inner slope 50 of the side beam will be installed. The mounting seat 20 is clamped and fixed to avoid the vibration of the magnetic drill 8 and the anti-rolling mounting seat 20 during the drilling process, which affects the drilling accuracy; The F clamps 4 clamp and fix the positioning support block 7 and the support frame 6, and place the magnetic drill 8 on the support frame 6. After electrification, under the action of electromagnetic force, the magnetic drill 8 is adsorbed on the surface of the support frame 6, such as The 2 rivet holes in the area of the inner slope 50 of the side beam shown in FIG. 1 are drilled; finally, the riveting operation of the positioning hole of the inner slope 50 of the side beam is performed under the clamping state of the F clip 4;

Continue to match the casting rivet holes to the other areas of the 50 aluminum profile on the inner slope of the side beam, and the number is 4; after completing the riveting operation of the remaining holes on the inner slope 50 of the side beam, remove the relevant auxiliary tooling;

Continue to match the casting rivet holes to the other areas of the 40 aluminum profile on the lower surface of the side beam, the number is 6; after completing the riveting operation of the remaining holes on the lower surface 40 of the side beam, remove the relevant auxiliary tooling;

After riveting, the rivets are inspected for size and looseness, and the qualified ones are transferred to the next process.

As mentioned above, the auxiliary tooling used for drilling and riveting the side beam of the underframe and the casting described in this application proposes a structural design and connection method of the auxiliary tooling with strong practicability, high precision and high efficiency. The structural characteristics of the casting are designed. The realized riveting process method, by flexibly converting the magnetic drill 8 to locate the datum reference plane, uses the inner sloped surface 50 of the side beam and the lower surface 40 of the side beam as the positioning datum plane respectively, which provides the necessary preconditions for the accuracy of mechanical drilling. ;Use the magnetic drill 8 to match the casting rivet hole to mechanically drill the side beam 10 profile. Compared with the previous manual drilling, it avoids the influence of external uncertain interference factors, ensures the accuracy of drilling, reduces the work intensity, and significantly improved production efficiency. The proposed technological process of drilling and riveting between the side beam 10 and the casting clearly defines the operation steps of drilling and riveting, which greatly guarantees the quality of the product and avoids the repair after the riveting of the physical product;

In general, the auxiliary tooling has strong practicability and flexible operation, which greatly ensures the accuracy and position and size requirements of drilling; at the same time, the present application provides certain experience and reference for drilling and riveting of other similar components.

As mentioned above, the content of the solutions given in conjunction with the drawings and descriptions, provided that they do not depart from the structural solutions of the present application, still belong to the protection scope of the solutions of the present application.

Claims (3)

1. The utility model provides a be used for chassis boundary beam and foundry goods drilling riveted auxiliary fixtures which characterized in that: comprises a supporting plate (3), an F-shaped clamping bar (4), a supporting frame (6), a positioning supporting block (7) and a magnetic drill (8);

the supporting plate (3) is of a flat plate structure, the cross section of the supporting frame (6) is L-shaped, and the positioning supporting block (7) is provided with at least two continuous T-shaped structures which are connected into a whole.

2. The auxiliary tool for drilling and riveting the edge beam of the underframe and the casting according to claim 1, wherein the auxiliary tool comprises: and a through groove (61) with a rectangular section is arranged between the two right-angle folded edges of the supporting frame (6), and the outer edge of the edge beam (10) is pressed into the through groove (61).

3. The auxiliary tool for drilling and riveting the edge beam of the underframe and the casting according to claim 1 or 2, wherein the auxiliary tool comprises: at the lower surface (40) of the edge beam, the supporting plate (3) and the casting are respectively positioned on the lower surface (40) of the edge beam, and the magnetic drill (8) is positioned on the supporting plate (3); at least one F-shaped clamping fence (4) is clamped and fixed at the vertical two ends of the upper surface of the supporting plate (3) and the lower surface (40) of the boundary beam, and at least one F-shaped clamping fence (4) is clamped at the vertical two ends of the casting and the lower surface (40) of the boundary beam;

at the inner inclined plane (50) of the boundary beam, the positioning support block (7) and the casting are respectively positioned on the inner inclined plane (50) of the boundary beam, the magnetic drill (8) is positioned on the positioning support block (7), and the support frame (6) is positioned at the outer edge of the lower surface of the boundary beam (10); at least one F-shaped clamping fence (4) is clamped and fixed between the upper surface of the positioning supporting block (7) and the bottom surface of the supporting frame (6) in the vertical direction, and at least one F-shaped clamping fence (4) is clamped at the two vertical ends of the bottom surfaces of the casting and the supporting frame (6).

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