Triangular cone thin-wall part machining tool

Abstract

The utility model provides a triangular cone thin-wall part machining tool which comprises a clamping jaw, a clamping block, a clamping block, a clamping block, a clamping block, a clamping block, a clamping block and a clamping block, wherein a strip-shaped hole is machined in the middle of the clamping jaw; and a fastening bolt is movably assembled in the strip-shaped hole. The shape of the hole site gauge is the same as that of the end face of the workpiece, and a plurality of measuring columns corresponding to the position of the end face of the workpiece are fixedly connected to the hole site gauge; the adjustable supporting block is installed on the supporting seat, inclined planes with the same inclination are machined on the top of the supporting seat and the bottom of the adjustable supporting block, and an adjusting bolt is installed between the adjustable supporting block and the supporting seat; the positioning column is a cylinder of which the diameter is the same as that of one end of the workpiece and is fixed on the positioning plate; by means of the tool, multiple portions of a part can be machined only through one-time clamping, the manufacturing period is shortened, the machining efficiency and the qualified rate of finished products are improved, a part detection component is arranged on the tool, machining deviation can be found and corrected in time, and the product quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to a tooling for machining thin-walled triangular pyramidal parts. Background Technology

[0002] This is a metal shell component for a protective cover. The component has an overall triangular pyramidal structure with a wall thickness of only 2.5mm, making it a typical irregularly shaped, thin-walled part. It has three conical holes at three different locations, and the central axes at both ends must be coplanar and perpendicular to the large end face. Furthermore, the component has extremely stringent requirements regarding relative dimensions, angular dimensions, and geometric tolerances. Due to its thin wall thickness, the component is highly susceptible to deformation during machining, and the magnesium alloy material cannot be cooled with conventional cutting fluids. These factors contribute to the significant difficulty in machining the component.

[0003] Existing processing methods require multiple flipping and clamping, making it difficult to control the dimensional accuracy of the parts. Furthermore, the processing cycle is long, and multiple clamping can easily lead to part deformation and low product qualification rate.

[0004] For example, CN218556272U discloses a CNC milling quick-change fixture for thin-walled conical aircraft cabins. By placing the thin-walled parts on a base and setting a limiting ring and a floating support clamping block on the base, the parts are restricted to the base. The floating support device buffers and absorbs the cutting force, reducing the scrap rate of the parts. However, the fixture not only blocks the side of the parts, but also requires the end face of the parts to contact the base. Therefore, it can only process the side of the parts, and the end face of the parts cannot be processed. If the end face of the parts needs to be processed, it is also necessary to flip and clamp the fixture multiple times. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a machining fixture for thin-walled triangular pyramidal parts.

[0006] This utility model is achieved through the following technical solution.

[0007] This utility model provides a machining fixture for thin-walled triangular pyramidal parts, comprising:

[0008] The gripper has a slotted hole machined in the middle, and a fastening bolt is movably assembled inside the slotted hole;

[0009] Hole position gauge: The shape of the hole position gauge is the same as that of the workpiece end face. Several measuring columns corresponding to the positions of the workpiece end face are fixed on the hole position gauge.

[0010] An adjustable support block is mounted on a support base. The top of the support base and the bottom of the adjustable support block are machined with inclined surfaces of the same angle, and an adjusting bolt is installed between the adjustable support block and the support base.

[0011] Positioning pin, which is a cylinder with the same diameter as one end of the workpiece, is fixed on the positioning plate;

[0012] The positioning pins and hole gauges are respectively installed at both ends of the base. The fastening bolts and support seats are vertically installed on the base. An even number of fastening bolts are symmetrically distributed along the center line between the hole gauge and the positioning pin, forming a profile that matches the side section of the workpiece. The number of support seats is equal to the number of fastening bolts, and each support seat is adjacent to the corresponding fastening bolt.

[0013] The base is also provided with a support plug gauge, the top of which contacts the end of the clamp away from the adjustable support block.

[0014] The support base is also provided with a baffle at the bottom of its inclined surface, which contacts the wider side of the adjustable support block. The adjusting bolt is threadedly engaged with the baffle and hinged to the side of the adjustable support block.

[0015] The adjustable support block is also provided with a dovetail groove at the top and a dovetail tenon at the bottom that matches the dovetail groove.

[0016] The base is also provided with two angle plug gauges facing each other. The two angle plug gauges are fixed on the support column respectively. The support column is assembled in the guide groove machined on the base. The center line direction of the angle plug gauge and the guide groove is the same as the hole to be machined on the side of the workpiece.

[0017] The detection surface of the angle plug gauge coincides with the axis of the conical hole to be machined on the side of the workpiece, and the angle plug gauge slides and adjusts in the guide groove through the support column.

[0018] A square block is fixed to the bottom of the hole gauge, and a square groove is machined on the edge of the base.

[0019] The beneficial effects of this utility model are as follows: the use of this tooling allows for multi-part processing of parts with only one clamping, shortens the manufacturing cycle, improves processing efficiency and finished product qualification rate, and the tooling is equipped with a part detection component, which can promptly detect and correct processing deviations to ensure product quality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the protective cover housing.

[0022] In the diagram: 1-base, 2-clamping jaw, 21-fastening bolt, 22-support plug gauge, 3-angle plug gauge, 31-support column, 32-guide groove, 4-hole position gauge, 41-measuring column, 42-square slide groove, 5-adjustable support block, 51-support seat, 52-adjusting bolt, 53-dovetail groove, 6-positioning column, 61-positioning plate. Detailed Implementation

[0023] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0024] A machining fixture for thin-walled triangular pyramid parts is characterized by comprising: a gripper 2 with a slotted hole machined in the middle, into which a fastening bolt 21 is movably fitted; a hole position gauge 4, the shape of which is the same as the end face of the workpiece, and several measuring columns 41 corresponding to the positions of the end face of the workpiece are fixedly connected to the hole position gauge 4; an adjustable support block 5, which is mounted on a support base 51, with the top of the support base 51 and the bottom of the adjustable support block 5 machined with inclined surfaces of the same slope, and an adjusting bolt 52 installed between the adjustable support block 5 and the support base 51; and a positioning column 6, which is a cylinder with the same diameter as one end of the workpiece and is fixed to a positioning plate 61. This fixture, through the synergistic action of the adjustable support block 5, the angle plug gauge 3, the support plug gauge 22, and the end hole position gauge 4, combined with a dedicated tool path and a five-axis machining center, enables multi-directional machining to be completed in a single setup. Among them, the angle plug gauge 3 cooperates with the guide groove 32 to ensure the angular accuracy of the conical hole; the support plug gauge 22 detects the clamping position in real time to reduce the risk of deformation.

[0025] The positioning pin 6 and the hole gauge 4 are respectively installed at both ends of the base 1. The fastening bolts 21 and the support seats 51 are both vertically installed on the base 1. An even number of fastening bolts 21 are symmetrically distributed along the centerline between the hole gauge 4 and the positioning pin 6, forming a profile that matches the side cross-section of the workpiece. The number of support seats 51 is equal to the number of fastening bolts 21, and each support seat 51 is adjacent to its corresponding fastening bolt 21. Tooling fixture structure and function description:

[0026] The adjustable support allows for precise adjustment of the part's position via threaded adjustment, ensuring the product's reference level.

[0027] The grippers are secured with bolts to firmly hold the parts, preventing displacement or deformation during machining. Support plug gauges are used to check the relative positional dimensions of the parts. Angular plug gauges are used to check the angular dimensions of the parts. End hole position gauges are used to check the positional accuracy of the end holes on the parts.

[0028] Furthermore, the base 1 is also provided with a support plug gauge 22, the top of which contacts the end of the clamp 2 away from the adjustable support block 5.

[0029] Furthermore, the support base 51 is provided with a baffle at the bottom of its inclined surface, which contacts the wider side of the adjustable support block 5. The adjusting bolt 52 is threadedly engaged with the baffle and hinged to the side of the adjustable support block 5.

[0030] Furthermore, the top of the adjustable support block 5 is also provided with a dovetail groove 53, and the bottom of the adjustable support block 5 is machined with a dovetail tenon that matches the dovetail groove 53.

[0031] Furthermore, the base 1 is also provided with two angle plug gauges 3, which are fixed on the support column 31 respectively. The support column 31 is assembled in the guide groove 32 machined on the base 1. The center line direction of the angle plug gauges 3 and the guide groove 32 is the same as the hole to be machined on the side of the workpiece.

[0032] Furthermore, a square block is fixed to the bottom of the hole position gauge 4, and a square groove 42 is machined on the edge of the base 1. During machining, the hole position gauge is removed. After machining each hole or all holes on the end face of the part, the hole position gauge is installed on the base through the precise cooperation of the directional block and the directional groove, ensuring more accurate positioning of each hole of the hole position gauge.

[0033] In the selection of materials for tooling and fixtures during the processing, we comprehensively considered the following factors:

[0034] Strength and rigidity: Tooling fixtures must have sufficient strength and rigidity to withstand the cutting forces during machining and maintain the positioning accuracy of the parts.

[0035] Wear resistance: Considering that tooling fixtures need to be used for a long time, their materials must have good wear resistance in order to extend their service life.

[0036] Coefficient of thermal expansion: To avoid dimensional changes caused by temperature variations, the coefficient of thermal expansion of the tooling and fixture material should be similar to that of the material of the workpiece.

[0037] Machining performance: The tooling and fixture materials must have good machinability to facilitate processing and manufacturing.

[0038] Based on the above considerations, the following materials were selected for the tooling components:

[0039] Base: Made of 45# medium carbon steel. This material has high strength, good rigidity, is easy to process, and has a moderate cost.

[0040] Positioning pins: Made of GCr15 bearing steel. This material has high hardness and good wear resistance, making it suitable for manufacturing key components such as positioning pins and positioning blocks.

[0041] Adjustable support block: Made of 6061 aluminum alloy. This material has low density, is lightweight, and has certain strength and rigidity, making it suitable for manufacturing auxiliary components such as adjustable supports.

Claims

1. A machining fixture for thin-walled triangular pyramidal parts, characterized in that... ,include: The gripper (2) has a slotted hole in the middle and a fastening bolt (21) is movably assembled in the slotted hole; Hole position gauge (4), the shape of the hole position gauge (4) is the same as the shape of the workpiece end face, and several measuring columns (41) corresponding to the position of the workpiece end face are fixed on the hole position gauge (4). Adjustable support block (5) is installed on support base (51). The top of support base (51) and the bottom of adjustable support block (5) are machined with the same slope. Adjusting bolt (52) is installed between adjustable support block (5) and support base (51). Positioning post (6), the positioning post (6) is a cylinder with the same diameter as one end of the workpiece, and it is fixed on the positioning plate (61); The positioning pin (6) and the hole gauge (4) are respectively installed at both ends of the base (1). The fastening bolts (21) and the support seats (51) are both vertically installed on the base (1). An even number of fastening bolts (21) are symmetrically distributed along the center line between the hole gauge (4) and the positioning pin (6), forming a profile that matches the side section of the workpiece. The number of support seats (51) is equal to the number of fastening bolts (21), and each support seat (51) is adjacent to the corresponding fastening bolt (21).

2. The machining fixture for thin-walled triangular pyramidal parts as described in claim 1, characterized in that: The base (1) is also provided with a support plug gauge (22), the top of which contacts the end of the clamp (2) away from the adjustable support block (5).

3. The machining fixture for thin-walled triangular pyramidal parts as described in claim 1, characterized in that: The support base (51) is also provided with a baffle at the bottom of its inclined surface, which contacts the wider side of the adjustable support block (5). The adjusting bolt (52) is threadedly engaged with the baffle and hinged to the side of the adjustable support block (5).

4. The machining fixture for thin-walled triangular pyramidal parts as described in claim 3, characterized in that: The top of the adjustable support block (5) is also provided with a dovetail groove (53), and the bottom of the adjustable support block (5) is machined with a dovetail tenon that matches the dovetail groove (53).

5. The machining fixture for thin-walled triangular pyramidal parts as described in claim 1, characterized in that: The base (1) is also provided with two angle plug gauges (3) facing each other. The two angle plug gauges (3) are fixed on the support column (31) respectively. The support column (31) is assembled in the guide groove (32) machined on the base (1). The center line direction of the angle plug gauge (3) and the guide groove (32) is the same as the hole to be machined on the side of the workpiece.

6. The machining fixture for thin-walled triangular pyramidal parts as described in claim 5, characterized in that: The detection surface of the angle plug gauge (3) coincides with the axis of the conical hole to be machined on the side of the workpiece, and the angle plug gauge (3) slides and adjusts in the guide groove (32) through the support column (31).

7. The machining fixture for thin-walled triangular pyramidal parts as described in claim 1, characterized in that: The bottom of the hole gauge (4) is fixed with a square block, and the edge of the base (1) is machined with a square groove (42).

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