Floating pressing mechanism for chassis structural part welding

Abstract

The utility model discloses a floating hold-down mechanism for chassis structural member welding, which comprises a clamp assembly, an air cylinder assembly and a floating mechanism assembly, the air cylinder assembly comprises an air cylinder arranged on a clamp bottom plate, pressing arms movably connected with two sides of the air cylinder, and pressing arm connecting blocks connected with the pressing arms; the floating mechanism assembly comprises a floating connecting block connected with the pressing arm connecting block, the floating connecting block and a straight block are connected in an inserted mode through a plug pin, a pin sleeve used for being movably connected with the plug pin is arranged in the straight block, and a gap is formed in the inserted connection position of the straight block and the floating connecting block. And the bottom surface of the straight block is provided with a pressure head for applying pressure to the upper surface of the sample piece. According to the utility model, the phenomena that a sample piece is not pressed tightly and shakes, and a welding seam deviates during welding are effectively avoided; and two points can be clamped by one cylinder, and independent clamping of one cylinder at one position is avoided, so that the manufacturing and maintenance cost of the clamp is saved, and more motion space is provided for analog simulation of the posture of the welding gun.

Description

Technical Field

[0001] The utility model relates to a floating pressing mechanism for welding chassis structural parts, belonging to the technical field of welding jigs. Background Art

[0002] For welding chassis structural parts and multiple support points of a sample part, in reality, the physical dimensions of stamping parts cannot completely conform to the digital model, and warping and rebound phenomena are common after forming. Therefore, each point is mostly clamped separately, resulting in a cumbersome fixture structure, high labor costs for simulating and emulating the welding torch posture in the early stage, and high fixture manufacturing, maintenance and repair costs. Summary of the Invention

[0003] The problem to be solved by the utility model is to provide a floating pressing mechanism for welding chassis structural parts.

[0004] To solve the above problems, the utility model is realized by the following technical solutions:

[0005] A floating pressing mechanism for welding chassis structural parts, which includes a fixture assembly, a cylinder assembly and a floating mechanism assembly. The cylinder assembly includes a cylinder arranged on a fixture bottom plate, a pressure arm connected to the cylinder, and a pressure arm connection block connected to the pressure arm. The fixture assembly includes a cylinder connection block for connecting the cylinder to the fixture bottom plate, and multiple support blocks for supporting the sample part. The floating mechanism assembly includes a floating connection block connected to the pressure arm connection block. The floating connection block is inserted into a straight block and the two are connected by a pin. A pin sleeve for movably connecting with the pin is arranged in the straight block, and a gap is arranged at the insertion part of the straight block and the floating connection block. A pressure head for pressing the upper surface of the sample part is arranged at the bottom surface of the straight block.

[0006] Preferably, left and right pressure heads are respectively arranged at both ends of the bottom surface of the straight block.

[0007] More preferably, the support blocks are arranged on the fixture bottom plate, and include a left support block, a middle support block and a right support block for respectively supporting the left side, the middle part and the right side of the sample part.

[0008] Further, the left support block and the right support block are respectively arranged corresponding to the left pressure head and the right pressure head, and the number of the middle support blocks is 2, which are respectively arranged on both sides of the middle part of the sample part for support.

[0009] Preferably, both sides of the cylinder are respectively connected to the fixture bottom plate through a cylinder connection block.

[0010] More preferably, the cylinder connection block is of an L-shaped structure.

[0011] Preferably, the height of the gap at the insertion part of the straight block and the floating connection block is 0.5 mm.

[0012] Preferably, the pressing arm is of a Y-shaped structure. The two ends on the same side of the Y-shaped structure are movably connected to both sides of the air cylinder, and the other end is connected to the output end of the air cylinder and the pressing arm connecting block.

[0013] The structure of the utility model is reasonably designed, effectively avoiding the height difference within the tolerance range of the two pressing points, which may cause gaps at single points of the sample parts, resulting in problems such as insufficient pressing and shaking, and the weld seam running off during welding. Moreover, it can achieve clamping two points with one air cylinder, avoiding the use of a single clamping with one air cylinder at each place, thus saving the cost of fixture manufacturing, maintenance and repair, and providing more movement space for the simulation of the welding torch posture. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the floating pressing mechanism provided by the utility model;

[0015] Figure 2 It is a schematic structural diagram of the floating mechanism assembly;

[0016] Figure 3 It is a cross-sectional view of the floating mechanism assembly. Detailed Embodiment

[0017] To make the utility model more obvious and understandable, a preferred embodiment is hereby described in detail in conjunction with the accompanying drawings as follows.

[0018] Embodiment

[0019] As Figure 1 shown, a floating pressing mechanism for welding chassis structural parts provided by the utility model includes a fixture assembly, an air cylinder assembly and a floating mechanism assembly. The air cylinder assembly includes an air cylinder 2 provided on a fixture bottom plate 1, a pressing arm 3 connected to the air cylinder 2, and a pressing arm connecting block 4 connected to the pressing arm 3. The fixture assembly includes a cylinder connecting block 6 for connecting the air cylinder 2 to the fixture bottom plate 1 and a plurality of support blocks for supporting the sample part A. Both sides of the air cylinder 2 are respectively connected to the fixture bottom plate 1 through a cylinder connecting block 6. The cylinder connecting block 6 is of an L-shaped structure.

[0020] As Figure 2 , 3 shown, the floating mechanism assembly includes a floating connecting block 5-3 connected to the pressing arm connecting block 4. The floating connecting block 5-3 is inserted into a straight block 5-1 and the two are connected by a pin 5-4. A pin sleeve 5-5 for movably connecting with the pin 5-4 is provided inside the straight block 5-1. A gap h with a height of 0.5 mm is provided at the insertion part of the straight block 5-1 and the floating connecting block 5-3. A pressing head for pressing the upper surface of the sample part A is provided on the bottom surface of the straight block 5-1.

[0021] At both ends of the bottom surface of the straight block 5-1, a left pressing head 5-2 and a right pressing head 5-6 are respectively provided. The support block is arranged on the fixture base plate 1 and includes a left support block 7, a middle support block 8, and a right support block 9 for respectively supporting the left side, the middle part, and the right side of the sample A. The left support block 7 and the right support block 9 are respectively arranged corresponding to the left pressing head 5-2 and the right pressing head 5-6, and the number of the middle support blocks 8 is two, which are respectively arranged on both sides of the middle part of the sample A for support.

[0022] The pressing arm 3 is of a Y-shaped structure. The two ends on the same side of the Y-shaped structure are movably connected to both sides of the air cylinder 2, and the other end is connected to the output end of the air cylinder and the pressing arm connecting block 4. When the air cylinder 2 executes the pressing command, the air cylinder 2 intakes air, causing the pressing arm 3 to move downward, and then pressing the sample A tightly. When the release command is executed, the air cylinder 2 deflates, and the pressing arm 3 lifts upward.

[0023] During welding, place the sample on the positioning surface and then clamp the air cylinder. After welding, open the air cylinder and take out the sample. In reality, the physical dimensions of stamping parts cannot completely conform to the digital model, and warping and rebound phenomena are common after forming. By using the floating pressing mechanism, the height difference within the tolerance range of the two pressing points is effectively avoided, so that there is no gap at a single point of the sample, and the phenomena of insufficient pressing and shaking are avoided, and the welding seam deviates during welding; moreover, this floating mechanism can clamp two points with one air cylinder, avoiding the use of a separate clamping with one air cylinder for each place, thus saving the fixture manufacturing and maintenance costs and providing more movement space for the simulation of the welding torch posture.

Claims

1. A floating clamping mechanism for welding chassis structural parts, characterized in that: The invention comprises a fixture assembly, a cylinder assembly and a floating mechanism assembly, wherein the cylinder assembly comprises a cylinder (2) arranged on a fixture base plate (1), a pressure arm (3) connected to the cylinder (2), and a pressure arm connecting block (4) connected to the pressure arm (3); the fixture assembly comprises a cylinder connecting block (6) for connecting the cylinder (2) to the fixture base plate (1), and a plurality of supporting blocks for supporting a sample; the floating mechanism assembly comprises a floating connecting block (5-3) connected to the pressure arm connecting block (4); the floating connecting block (5-3) is plugged into a straight block (5-1) and the two are connected via a latch (5-4); a pin sleeve (5-5) for movably connecting to the latch (5-4) is arranged in the straight block (5-1); a gap is arranged at the plugging point between the straight block (5-1) and the floating connecting block (5-3); a pressure head for applying pressure to the upper surface of the sample is arranged on the bottom surface of the straight block (5-1).

2. The floating clamping mechanism for chassis structural parts welding according to claim 1, characterized in that: A left pressure head (5-2) and a right pressure head (5-6) are respectively provided at two ends of the bottom surface of the straight block (5-1).

3. The floating clamping mechanism for chassis structural member welding according to claim 2, characterized in that: The support blocks are arranged on the fixture bottom plate (1), and include a left support block (7), a middle support block (8), and a right support block (9) for supporting the left side, the middle, and the right side of the sample respectively.

4. The floating clamping mechanism for chassis structural member welding according to claim 3, characterized in that: The left support block (7) and the right support block (9) are respectively arranged corresponding to the left pressure head (5-2) and the right pressure head (5-6), and the number of the middle support blocks (8) is 2, which are respectively arranged on both sides of the middle part of the supporting sample.

5. The floating clamping mechanism for chassis structural member welding according to claim 1, characterized in that: Both sides of the cylinder (2) are connected to the fixture bottom plate (1) via a cylinder connecting block (6) respectively.

6. The floating clamping mechanism for chassis structural member welding according to claim 5, characterized in that: The cylinder connecting block (6) is an L-shaped structure.

7. The floating clamping mechanism for chassis structural member welding according to claim 1, characterized in that: The height of the gap between the straight block (5-1) and the floating connection block (5-3) at the plug-in position is 0.5 mm.

8. The floating clamping mechanism for chassis structural member welding according to claim 1, characterized in that: The pressure arm (3) is a Y-shaped structure, the two ends of the Y-shaped structure on the same side are movably connected to the two sides of the cylinder (2), and the other end is connected to the output end of the cylinder and the pressure arm connection block (4).

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