A flexible cylinder positioning fixture for die-cast parts

Abstract

This utility model relates to the field of die-casting part processing fixtures, and more particularly to a flexible cylinder positioning fixture for die-cast parts. It includes a base plate, a guide anti-misalignment block, and a fixing plate. A foot pad is installed on the lower end face of the base plate, and a ball-end point support structure and a positioning plate are installed on the upper end face of the base plate to support easily deformable, thin die-cast parts. There are three ball-end point support structures, each contacting the lower end face of the die-cast part to form a fixed surface. The included angles between the three ball-end point support structures and the positioning plate are the same. The guide anti-misalignment block is located on one side of the die-cast part and is used to contact the die-cast part. The fixing plate includes a first plate, a second plate, and a third plate, which are used to press against the upper end face of the die-cast part and are respectively positioned directly above the ball-end point support structures. This utility model ensures that the machining and clamping process of easily deformable, thin parts does not involve twisting.

Description

Technical Field

[0001] This utility model relates to the field of die casting processing fixtures, specifically a flexible cylinder positioning fixture for die casting parts. Background Technology

[0002] Die castings, as an important type of metal casting product, are widely used in various industries such as automotive, electronics, and aerospace. The manufacturing process employs high-pressure injection, rapidly injecting molten metal into a precision mold, which then cools and solidifies to obtain the desired casting shape.

[0003] In the existing technology, easily deformable and thin die-cast parts, such as automotive throttle body gaskets, need to be processed by CNC machine tools. However, existing machining fixtures are not suitable for processing large-sized thin magnesium alloy die-cast parts, which can easily cause deformation of thin die-cast parts, resulting in changes in dimensions, affecting the accuracy and dimensional stability of the product, and ultimately leading to product defects. Utility Model Content

[0004] The purpose of this invention is to provide a flexible cylinder positioning fixture for die-cast parts to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A flexible cylinder positioning fixture for die-cast parts includes a base plate, a guide anti-misalignment block, and a fixing plate. A foot pad is installed on the lower end face of the base plate, and a ball-end point support structure and a positioning plate are installed on the upper end face of the base plate to support the easily deformable and thin die-cast parts. There are three ball-end point support structures, each contacting the lower end face of the die-cast part to form a fixed surface. The included angles between the three ball-end point support structures and the positioning plate are the same. The guide anti-misalignment block is located on one side of the die-cast part and is used to contact the die-cast part. The fixing plate includes a first plate, a second plate, and a third plate, which are used to press against the upper end face of the die-cast part and are respectively positioned directly above the ball-end point support structure.

[0006] Furthermore, the ball head support structure includes a column and a ball head steel ball. The top of the column has a steel ball groove for embedding the ball head steel ball, and the ball head steel ball has a cutting surface.

[0007] Furthermore, the column is installed on the upper end face of the base plate, the ball groove is equipped with a limiting ring to prevent the ball head ball from falling off, and the cutting plane can be exposed outside the ball groove.

[0008] Furthermore, a rotary clamping cylinder is installed on the lower end face of the base plate. The rotary clamping cylinder includes a first rotary clamping cylinder, a second rotary clamping cylinder, and a third rotary clamping cylinder. The piston rods of the first rotary clamping cylinder, the second rotary clamping cylinder, and the third rotary clamping cylinder pass through the base plate and are used to drive the first pressure plate, the second pressure plate, and the third pressure plate to rotate and press down to clamp the die-cast parts, respectively.

[0009] Furthermore, a fixing cylinder is also installed on the upper surface of the base plate. The fixing cylinder includes a first fixing cylinder and a second fixing cylinder, both of which are located on one side of the die-cast part opposite to the guide anti-fool block.

[0010] Furthermore, the piston rod ends of both the first and second fixed cylinders are screwed with internally threaded polyurethane pressure blocks.

[0011] Furthermore, an auxiliary positioning block is also installed on the upper surface of the base plate. The auxiliary positioning block is located near the guide anti-fooling block, the positioning pressure plate and the first pressure plate, respectively, and is used to limit the position of the die-cast parts.

[0012] Furthermore, an installation switch and a main switch are installed on both sides of the base plate where the foot pad is located. The installation switch / main switch is used to control the start and stop of the rotary clamping cylinder, and the main switch / installation switch is used to control the start and stop of the fixing cylinder.

[0013] Furthermore, the rotary clamping cylinder is equipped with an L-shaped speed control valve and a muffler.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention employs a point-to-point support method using three ball-headed steel balls. The cutting plane of the ball-headed steel balls automatically floats and rotates to the appropriate contact point, effectively avoiding deformation of the die-cast part itself. Based on the principle of three points on one surface, and with a fourth point of movable insertion positioning, this highly efficient device completes the machining of the four contours of the die-cast part in one rotation on a CNC machine tool, simultaneously machining all features on the front and back sides. The cutting plane of the ball-headed steel balls provides flexible point-to-point clamping, preventing twisting of easily deformable, thin parts during clamping, resulting in more stable machining quality and higher efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the die-cast part structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the bottom structure of the die-cast part of this utility model.

[0017] Figure 3 This is a schematic diagram of the fixture of this utility model for holding die-cast parts.

[0018] Figure 4This utility model Figure 3 A schematic diagram showing the removal of die-cast parts.

[0019] Figure 5 This utility model Figure 3 Rear view diagram.

[0020] Figure 6 This utility model Figure 3 A diagram showing the view from below.

[0021] Figure 7 This is a schematic diagram illustrating the third fixed cylinder of this utility model.

[0022] In the diagram: 1-Base plate, 2-Foot pad, 3-First positioning pin, 4-Cylinder pad, 5-Muffler, 6-Cylinder mounting plate, 7-Second fixed cylinder, 8-Guide anti-foolproof block, 9-Limit ring, 10-Steel ball groove, 11-Second positioning pin, 12-Column, 13-Auxiliary positioning block, 14-Positioning pressure plate, 15-First pressure plate, 16-First fixed cylinder, 17-Internal thread polyurethane pressure block, 18-Second rotary clamping cylinder, 19-First rotary clamping cylinder, 20-Third rotary clamping cylinder, 21-Second pressure plate, 22-Third pressure plate, 23-L-type speed control valve, 24-Installation switch, 25-Main switch, 26-Pipe connector, 27-Ball head steel ball, 28-Cutting surface, 29-Handle, 30-Die-cast part, 31-Slide groove, 32-Third fixed cylinder. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper end," "lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figures 1 to 7 This utility model provides a technical solution: A flexible cylinder positioning fixture for die-cast parts can be used for clamping and positioning automotive throttle body gaskets (i.e., die-cast parts 30 hereinafter). The flexible cylinder positioning fixture includes a base plate 1, a guide anti-misalignment block 8, and a fixed pressure plate. A foot pad 2 is installed on the lower end face of the base plate 1, and a ball-end point support structure and a positioning pressure plate 14 for supporting the easily deformable and thin die-cast parts 30 are installed on the upper end face of the base plate 1. There are three ball-end point support structures, which respectively contact the lower end face of the die-cast parts 30 to form a fixed surface. The included angles between the three ball-end point support structures and the positioning pressure plate 14 are the same. The guide anti-misalignment block 8 is located on one side of the die-cast parts 30 and is used to contact the die-cast parts 30. The fixed pressure plate includes a first pressure plate 15, a second pressure plate 21, and a third pressure plate 22. The first pressure plate 15, the second pressure plate 21, and the third pressure plate 22 are used to clamp the upper end face of the die-cast parts 30 and are respectively located directly above the ball-end point support structures.

[0027] This utility model optimizes the positioning and clamping method of the fixture, and adopts a two-sided processing method for the front feature in a single operation. For example... Figure 3 and Figure 4 As shown, three ball-headed steel balls 27 are designed as ball-head point supports. The ball-heads will automatically float and rotate to the appropriate contact point according to the surface deformation of the die-cast part 30. This allows the lower end face of the die-cast part 30 to contact the cutting plane 28, effectively avoiding the deformation of the die-cast part 30 itself. At the same time, the three points form a fixed surface. The fourth point uses the second positioning pin 11 to be inserted into the bottom groove d, so that the vertex of the second positioning pin 11 contacts the groove surface of the bottom groove d and is relatively positioned and fixed. This allows the die-cast part 30 to be held in a natural state and pressed by the cylinder, so that the clamping process does not cause twisting.

[0028] Specifically, the ball joint support structure includes a column 12 and a ball joint steel ball 27. The top of the column 12 has a steel ball groove 31 for embedding the ball joint steel ball 27, and the ball joint steel ball 27 has a cutting surface 28. The column 12 is mounted on the upper end face of the base plate 1, and the steel ball groove 31 is equipped with a limiting ring 32 to prevent the ball joint steel ball 27 from falling out. The cutting surface 28 can be exposed outside the steel ball groove 31.

[0029] like Figure 4 As shown, three columns 12 are installed on the base plate 1. Each column 12 has a ball-head steel ball 27 embedded in its top. However, a cutting plane 28 is cut out of the ball-head steel ball 27 and is exposed. When the die-cast part 30 is vertically downward, the ball-head steel ball 27 will automatically rotate as the bottom surface of the die-cast part 30 becomes flat, until the bottom surface of the die-cast part 30 matches the cutting plane 28 of the ball-head steel ball 27.

[0030] Specifically, a rotary clamping cylinder is installed on the lower end face of the base plate 1. The rotary clamping cylinder includes a first rotary clamping cylinder 19, a second rotary clamping cylinder 18, and a third rotary clamping cylinder 20. The piston rods of the first rotary clamping cylinder 19, the second rotary clamping cylinder 18, and the third rotary clamping cylinder 20 pass through the base plate 1 and are used to drive the first pressure plate 15, the second pressure plate 21, and the third pressure plate 22 to rotate and press down to clamp the die-casting part 30, respectively.

[0031] Specifically, a fixing cylinder is also installed on the upper surface of the base plate 1. The fixing cylinder includes a first fixing cylinder 16, a second fixing cylinder 7, and a third fixing cylinder 32. The first fixing cylinder 16 and the second fixing cylinder 7 are both located on one side of the die-cast part 30 opposite to the guide anti-fool block 8. The piston rod ends of the first fixing cylinder 16, the second fixing cylinder 7, and the third fixing cylinder 32 are all screwed with internally threaded polyurethane pressure blocks 17.

[0032] Specifically, an auxiliary positioning block 13 is also installed on the upper surface of the base plate 1. The auxiliary positioning block 13 is located near the guide anti-fool block 8, the positioning pressure plate 14 and the first pressure plate 15, respectively, and is used to limit the position of the die-cast part 30.

[0033] After the bottom surface of the die-cast part 30 aligns with the cutting plane 28 of the ball-head steel ball 27, a rotary clamping cylinder is used to clamp the die-cast part 30 while maintaining its natural state. Figure 1 As shown, the piston rods of the first rotary clamping cylinder 19, the second rotary clamping cylinder 18, and the third rotary clamping cylinder 20 can extend and retract along the z-axis and rotate, thereby driving the first pressure plate 15, the second pressure plate 21, and the third pressure plate 22 to rotate and rise and fall, thereby clamping and releasing the upper surface of the die-cast part 30.

[0034] The first fixed cylinder 16 and its internal threaded polyurethane pressure block 17 can extend and retract along the x-axis direction, and the second fixed cylinder 7 and its internal threaded polyurethane pressure block 17 can also extend and retract along an approximate x-axis direction.

[0035] This utility model utilizes a first fixed cylinder 16 and a second fixed cylinder 7 to push an internally threaded polyurethane pressure block 17, which can flexibly tighten one side of the die-cast part 30. With the auxiliary positioning block 13 located near the guide anti-fool block 8, side point contact is achieved, and the air spring is pushed into place. The process can be completed in one go, reducing the number of steps, increasing efficiency, and improving quality stability.

[0036] Specifically, an installation switch 24 and a main switch 25 are installed on both sides of the base plate 1 where the foot pad 2 is located. The installation switch 24 / main switch 25 is used to control the start and stop of the rotary clamping cylinder, and the main switch 25 / installation switch 24 is used to control the start and stop of the fixing cylinder. The rotary clamping cylinder is equipped with an L-shaped speed regulating valve 23 and a muffler 5.

[0037] Install switch 24 and main switch 25 are manual valves (or pneumatic switch manual reversing valves) and are equipped with handle 29, which are used to control the start and stop of the rotary clamping cylinder and the fixed cylinder, respectively, so as to realize the logic control of them.

[0038] In this utility model, the bottom groove d of the die-cast part 30 is first aligned with the second positioning pin 11, and the die-cast part 30 is placed on the ball head steel ball 27 so that the bottom surface matches the cutting plane 28, that is, the three cutting planes 28 respectively correspond to the bottom surface a, bottom surface b and bottom surface c of the die-cast part 30. Then, the side walls i and j on both sides of the f end face of the die-cast part 30 approach the guide anti-fool block 8 and the mating auxiliary positioning block 13 located at the first pressure plate 15 and the second pressure plate 21, respectively. The guide anti-fool block 8 and the mating auxiliary positioning block 13 are used for anti-fooling. The e end face of the die-cast part 30 abuts against the first positioning pin 3. Next, the cylinders are opened: the first fixed cylinder 16 and the second fixed cylinder 7. The internally threaded polyurethane pressure block 17 connected to the piston rod of the first fixed cylinder 16 pushes the h end face of the die-cast part 30. At the same time, the internally threaded polyurethane pressure block 17 connected to the piston rod of the second fixed cylinder 7 pushes the side wall m. Then, the first rotary clamping cylinder 19, the second rotary clamping cylinder 18 and the third rotary clamping cylinder 20 are opened to clamp the die-cast part 30 through the first pressure plate 15, the second pressure plate 21 and the third pressure plate 22 respectively.

[0039] This utility model, as a preferred embodiment, is as follows: Figure 7As shown, a third fixing cylinder 32 (shown as dashed in the figure) can be installed on the upper surface of the base plate 1. Initially, the third fixing cylinder 32 pulls the positioning plate 14 back away from the auxiliary positioning block 13, so as not to affect the placement of the die-cast part 30. The positioning plate 14 is located in the slide groove 31 on the upper surface of the base plate 1. The third fixing cylinder 32 is connected to the positioning plate 14 and is used to push and pull the positioning plate 14 so that the positioning plate 14 can reciprocate along the y-axis direction in the slide groove 31. When the internally threaded polyurethane pressure block 17 connected to the piston rod of the first fixed cylinder 16 pushes the h end face of the die-cast part 30, and at the same time the internally threaded polyurethane pressure block 17 connected to the piston rod of the second fixed cylinder 7 pushes the side wall m, the internally threaded polyurethane pressure block 17 connected to the piston rod of the third fixed cylinder 32 is controlled to push the positioning pressure plate 14 to slide in the slide groove 31 and finally abut against the g end face of the die-cast part 30, so that the side wall k of the die-cast part 30 is tightly attached to the guide anti-fooling block 8. In this way, the entire circumference of the die-cast part 30 is flexibly pressed tight, the die-cast part 30 is pressed more firmly, and it is easier to process.

[0040] This invention employs a point-to-point support method using three ball-headed steel balls 27. The cutting surface 28 of the ball-headed steel balls 27 automatically floats and rotates to a suitable contact point, effectively avoiding deformation of the die-cast part 30 itself. Based on the principle of three points on one surface, and with a fourth point for insertion positioning, this highly efficient device completes the machining of the four contours of the die-cast part 30 in one rotation on a CNC machine tool, simultaneously machining all features on the front and back sides. The cutting surface 28 of the ball-headed steel balls 27 provides flexible point-to-point clamping, preventing distortion of easily deformable thin parts (die-cast part 30) during clamping, resulting in more stable machining quality and higher efficiency.

[0041] The parts of this utility model not described are existing technologies.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flexible air cylinder positioning fixture for die cast parts, characterized by, The system includes a base plate (1), a guide anti-misalignment block (8), and a fixing plate. The lower end face of the base plate (1) is equipped with a foot pad (2). The upper end face of the base plate (1) is equipped with a ball head point support structure and a positioning plate (14) for supporting the easily deformable and thin die-cast part (30). There are three ball head point support structures, which respectively contact the lower end face of the die-cast part (30) to form a fixed surface. The included angle between the three ball head point support structures and the positioning plate (14) is the same. The guide anti-misalignment block (8) is located on one side of the die-cast part (30) and is used to contact the die-cast part (30). The fixing plate includes a first plate (15), a second plate (21), and a third plate (22). The first plate (15), the second plate (21), and the third plate (22) are used to press the upper end face of the die-cast part (30) and are respectively located directly above the ball head point support structure.

2. A flexible air cylinder positioning fixture for die cast parts as defined in claim 1 wherein, The ball head support structure includes a column (12) and a ball head steel ball (27). The top of the column (12) has a steel ball groove (31) for embedding the ball head steel ball (27), and the ball head steel ball (27) has a cutting surface (28).

3. A flexible air cylinder positioning fixture for die cast parts as defined in claim 2 wherein, The column (12) is installed on the upper end face of the base plate (1), and the ball groove (31) is equipped with a limiting ring (32) to prevent the ball head ball (27) from falling off. The cutting plane (28) can be exposed outside the ball groove (31).

4. A flexible air cylinder positioning fixture for die cast parts as defined in claim 1 wherein, A rotary clamping cylinder is installed on the lower end face of the base plate (1). The rotary clamping cylinder includes a first rotary clamping cylinder (19), a second rotary clamping cylinder (18), and a third rotary clamping cylinder (20). The piston rods of the first rotary clamping cylinder (19), the second rotary clamping cylinder (18), and the third rotary clamping cylinder (20) pass through the base plate (1) to drive the first pressure plate (15), the second pressure plate (21), and the third pressure plate (22) to rotate and press down to clamp the die-cast parts (30).

5. A flexible cylinder positioning fixture for die-cast parts as described in claim 4, characterized in that, The upper end face of the base plate (1) is also equipped with a fixing cylinder, which includes a first fixing cylinder (16) and a second fixing cylinder (7). The first fixing cylinder (16) and the second fixing cylinder (7) are both located on one side of the die-cast part (30) opposite to the guide anti-fool block (8).

6. A flexible air cylinder positioning fixture for die cast parts as defined in claim 5 wherein, Both the piston rod ends of the first fixed cylinder (16) and the second fixed cylinder (7) are screwed with internally threaded polyurethane pressure blocks (17).

7. A flexible air cylinder positioning fixture for die cast parts as defined in claim 1 wherein, An auxiliary positioning block (13) is also installed on the upper surface of the base plate (1). The auxiliary positioning block (13) is located near the guide anti-fool block (8), the positioning pressure plate (14) and the first pressure plate (15) respectively, and is used to limit the position of the die-cast part (30).

8. A flexible air cylinder positioning fixture for die cast parts as defined in claim 5 wherein, On both sides of the base plate (1) where the foot pad (2) is located, there are installation switches (24) and main switches (25). The installation switches (24) and main switches (25) are used to control the start and stop of the rotary clamping cylinder, and the main switches (25) and installation switches (24) are used to control the start and stop of the fixed cylinder.

9. A flexible air cylinder positioning fixture for die cast parts as defined in claim 4 wherein, The rotary clamping cylinder is equipped with an L-type speed control valve (23) and a silencer (5).

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