A positioning device for a nickel-iron alloy machining grinding machine

Abstract

This utility model belongs to the field of machining technology and discloses a positioning device for a nickel-iron alloy grinding machine. It includes a base with a weight-reducing groove and heat dissipation holes on its upper surface, and symmetrically arranged T-shaped grooves inside the base; a T-shaped slider that matches the T-shaped grooves, with the horizontal section of the slider being lower than the horizontal section of the groove, forming a pressure-fixing gap; and a positioning module including a positioning hand-tightening bolt mounted on the T-shaped slider. An adjustable positioning block is fitted onto the outer surface of the positioning hand-tightening bolt. The base is a rigid platform made of gray cast iron or ductile iron, and elongated oval fixing holes for connection to the grinding machine's worktable are provided at its four corner edges. This utility model, through its T-shaped slider / groove structure, rigid base material, and weight-reducing groove design, significantly improves the accuracy of repeatable positioning and suppresses machining vibration, making it suitable for the high-precision grinding requirements of nickel-iron alloys.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a positioning device for a nickel-iron alloy machining grinding machine. Background Technology

[0002] Grinding machines are key equipment in the machinery manufacturing industry used for high-precision grinding of workpieces. When grinding precision parts (such as molds and aerospace components) made of nickel-iron alloys (such as Invar alloys and Kovar alloys), the high hardness, high toughness, and special coefficient of thermal expansion of these materials place extremely high demands on clamping and positioning.

[0003] Currently, common grinding machine positioning and clamping methods mostly use general-purpose flat-jaw vises in conjunction with standard pads or special tooling. These methods have the following problems: 1) Insufficient positioning accuracy: When general-purpose fixtures are used for special materials and high precision requirements, the repeatability of positioning is low, which can easily introduce clamping errors and affect the workpiece machining quality. 2) Easily causes workpiece damage: Nickel-iron alloys have high surface requirements. Rigid clamping or point contact can easily cause workpiece surface damage or deformation under clamping force, resulting in scrap. Therefore, we propose a positioning device for nickel-iron alloy machining grinding machines. Utility Model Content

[0004] In view of the problems of insufficient positioning accuracy and easy damage to workpieces caused by the existing positioning devices, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A positioning device for a nickel-iron alloy grinding machine includes a base, the upper surface of which is provided with a weight-reducing groove and a heat dissipation hole, and the interior of which is provided with symmetrically arranged T-shaped sliding grooves. The T-shaped slider is adapted to the T-shaped groove, and the height of the horizontal section of the T-shaped slider is less than the height of the horizontal section of the T-shaped groove, forming a pressing and fixing gap; The positioning module includes a positioning hand-tightening bolt installed on the T-shaped slider, and an adjustable positioning block is sleeved on the outer surface of the positioning hand-tightening bolt.

[0006] As a technical solution of the positioning device for a nickel-iron alloy machining grinding machine described in this utility model, the base is a rigid platform, and the base is made of gray cast iron or ductile iron to reduce vibration interference during the machining process and ensure positioning accuracy.

[0007] As a technical solution of the positioning device for a nickel-iron alloy machining grinding machine described in this utility model, the base is provided with elongated oval fixing holes at the four corner edges that connect to the grinding machine worktable, so as to allow the base to be finely adjusted and installed on the grinding machine worktable, adapting to different processing needs and enhancing versatility.

[0008] As a technical solution of the positioning device for a nickel-iron alloy machining grinding machine described in this utility model, the weight reduction groove is a groove that is equidistantly arranged along the length and width directions of the base, so as to avoid deformation caused by local stress concentration and maintain the flatness of the positioning reference surface.

[0009] As a technical solution of the positioning device for a nickel-iron alloy machining grinding machine according to the present utility model, the top of the T-shaped slider is provided with a threaded hole that is compatible with the positioning hand-tightening bolt, and the threaded hole is threadedly connected to the positioning hand-tightening bolt to meet the adaptation requirements of high-precision workpiece dimensions.

[0010] As a technical solution of the positioning device for a nickel-iron alloy machining grinding machine according to the present invention, the adjustable positioning block is an L-shaped structure with a horizontal part and a vertical part. The horizontal part is sleeved on the outer surface of the positioning hand-tightening bolt through a through hole. The vertical part is integrally formed with the horizontal part to provide multi-directional limiting support, disperse clamping force, and reduce the risk of workpiece deformation.

[0011] As a technical solution of the positioning device for a nickel-iron alloy machining grinding machine described in this utility model, a hard indenter is installed at the bottom of the vertical part, and the contact surface between the hard indenter and the workpiece is spherical. The hard indenter is made of polycrystalline cubic boron nitride material, so as to avoid indentation on the surface of the nickel-iron alloy while ensuring clamping force, thereby reducing the scrap rate.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model, through its T-shaped slider / groove structure, rigid base material, and weight-reducing groove design, can significantly improve the accuracy of repeatable positioning and suppress machining vibration, making it suitable for the high-precision grinding requirements of nickel-iron alloys.

[0013] 2. This utility model achieves flexible clamping and multi-point pressure equalization by using a polycrystalline cubic boron nitride spherical hard indenter and an L-shaped adjustable positioning block, thereby reducing the damage rate of the workpiece surface. In addition, the modular design can be adapted to various irregular workpiece clamping scenarios. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the main structure of this utility model.

[0015] Figure 2 This is a half-sectional structural diagram of the present invention.

[0016] Figure 3 This is an exploded view of the positioning module and T-shaped slider of this utility model.

[0017] Explanation of reference numerals in the attached figures: In the diagram: 1. Base; 101. Weight reduction groove; 102. Heat dissipation hole; 103. Oblong fixing hole; 104. T-shaped slide; 2. T-shaped slider; 201. Threaded hole; 3. Positioning hand-tightening bolt; 4. Adjustable positioning block; 401. Horizontal part; 402. Through hole; 403. Vertical part; 404. Hard pressure head. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Reference Figures 1-3 A positioning device for a nickel-iron alloy grinding machine is provided. The positioning device for a nickel-iron alloy grinding machine includes a base 1. The upper surface of the base 1 is provided with a weight reduction groove 101 and a heat dissipation hole 102. The interior of the base 1 is provided with symmetrically arranged T-shaped sliding grooves 104. T-shaped slider 2 is adapted to T-shaped groove 104, and the height of the horizontal section of T-shaped slider 2 is less than the height of the horizontal section of T-shaped groove 104, forming a pressing and fixing gap. The horizontal section height of T-shaped groove 104 is 15mm, and the horizontal section thickness of T-shaped slider 2 is 10mm, forming a 5mm pressing gap. The fitting accuracy is H7 / g6 to ensure smooth sliding without gaps or shaking. The positioning module includes a positioning hand-tightening bolt 3 mounted on the T-shaped slider 2. The positioning hand-tightening bolt 3 uses an M10 fine thread (1mm pitch) and engages with the top thread of the T-shaped slider 2. One rotation results in a displacement of 1mm. An adjustable positioning block 4 is fitted onto the outer surface of the positioning hand-tightening bolt 3. In application, through the cooperation between the T-shaped slider 2 and the T-shaped groove 104, as well as the design of the anti-pressing fixed gap, multi-degree-of-freedom precise positioning can be achieved, reducing clamping errors. At the same time, the weight-reducing groove 101 and the heat dissipation hole 102 optimize the structure of the base 1, reducing weight and improving heat dissipation efficiency to enhance the stability of the device.

[0020] Reference Figure 1 and Figure 2 The base 1 is a rigid platform and is made of gray cast iron or ductile iron. In application, the gray cast iron or ductile iron base 1 has both high rigidity and vibration resistance, which reduces vibration interference during processing and ensures positioning accuracy.

[0021] Reference Figure 1 and Figure 2 The base 1 has elongated oval fixing holes 103 at its four corner edges for connection with the grinding machine table. The long axis of the elongated oval fixing holes 103 is 20mm and the short axis is 12mm. They are connected to the grinding machine table by M12 bolts, allowing for ±3mm fine adjustment of the installation position. In application, the elongated oval fixing holes 103 allow the base 1 to be finely adjusted on the grinding machine table to adapt to different processing needs and enhance versatility.

[0022] Reference Figure 1 and Figure 2 The weight-reducing groove 101 is a groove that is equidistantly arranged along the length and width of the base 1. In application, the equidistantly arranged weight-reducing groove 101 further balances the force distribution of the base 1, avoids deformation caused by local stress concentration, and maintains the flatness of the positioning reference surface.

[0023] Reference Figure 2 and Figure 3 The top of the T-shaped slider 2 is provided with a threaded hole 201 that is compatible with the positioning hand-tightening bolt 3, and the threaded hole 201 and the positioning hand-tightening bolt 3 are connected by a thread. In application, the precise fit between the threaded hole 201 and the positioning hand-tightening bolt 3 enables the stepless adjustment of the adjustable positioning block 4, which meets the adaptation requirements of high-precision workpiece dimensions.

[0024] Reference Figure 2 and Figure 3The adjustable positioning block 4 is an L-shaped structure with a horizontal part 401 and a vertical part 403. The horizontal part 401 is sleeved on the outer surface of the positioning hand-tightening bolt 3 through the through hole 402. The vertical part 403 is integrally formed with the horizontal part 401. In application, the L-shaped adjustable positioning block 4 provides multi-directional limiting support through the synergistic effect of the horizontal part 401 and the vertical part 403, disperses the clamping force, and reduces the risk of workpiece deformation.

[0025] Reference Figure 2 and Figure 3 A hard indenter 404 is installed at the bottom of the vertical part 403, and the contact surface between the hard indenter 404 and the workpiece is spherical. The hard indenter 404 is made of polycrystalline cubic boron nitride. In application, the high wear resistance and spherical contact design of the polycrystalline cubic boron nitride (PCBN) hard indenter 404 can ensure clamping force while avoiding indentation on the nickel-iron alloy surface and reducing scrap rate.

[0026] The working principle of this utility model is as follows: Installation and calibration of base 1: First, clean the grinding machine worktable, and initially fix the base 1 through the elongated fixing hole 103. Then, use an external dial indicator to check the flatness of the upper surface of the base 1 (required to be ≤0.02mm / 300mm). After fine-tuning the bolts to meet the standard, tighten them. Workpiece clamping operation: Place the nickel-iron alloy workpiece on the positioning reference surface of the base 1, then push the L-shaped adjustable positioning block 4 to make the PCBN hard pressure head 404 contact the workpiece, alternately tighten the positioning hand-tightening bolts 3 on both sides to a torque of 5 N·m to achieve uniform pressure clamping, and then check the workpiece degree of freedom to ensure that there is no displacement in the X / Y direction. Post-processing maintenance: After disassembling the workpiece, clean the iron filings in the weight reduction groove 101 on the base 1, and check the wear of the spherical surface of the hard indenter 404 (replace if it exceeds 0.1mm). At the same time, apply lithium-based grease to the T-shaped slide groove 104 regularly to keep it sliding smoothly.

[0027] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A positioning device for a nickel-iron alloy machining grinding machine, characterized in that: include: The base (1) has a weight-reducing groove (101) and a heat dissipation hole (102) on its upper surface, and a symmetrically arranged T-shaped sliding groove (104) is provided inside the base (1). T-shaped slider (2), the T-shaped slider (2) is adapted to the T-shaped groove (104), and the height of the horizontal section of the T-shaped slider (2) is less than the height of the horizontal section of the T-shaped groove (104), forming a pressing and fixing gap; The positioning module includes a positioning hand-tightening bolt (3) installed on the T-shaped slider (2), and an adjustable positioning block (4) is sleeved on the outer surface of the positioning hand-tightening bolt (3).

2. The positioning device for a nickel-iron alloy machining grinding machine according to claim 1, characterized in that: The base (1) is a rigid platform, and the base (1) is made of gray cast iron or ductile iron.

3. The positioning device for a nickel-iron alloy machining grinding machine according to claim 1, characterized in that: The base (1) has elongated oval fixing holes (103) at its four corner edges that are connected to the grinding machine table.

4. The positioning device for a nickel-iron alloy machining grinding machine according to claim 1, characterized in that: The weight-reducing groove (101) is a groove that is equidistantly arranged along the length and width of the base (1).

5. The positioning device for a nickel-iron alloy machining grinding machine according to claim 1, characterized in that: The top of the T-shaped slider (2) is provided with a threaded hole (201) that is compatible with the positioning hand-tightening bolt (3), and the threaded hole (201) is threadedly connected to the positioning hand-tightening bolt (3).

6. The positioning device for a nickel-iron alloy machining grinding machine according to claim 1, characterized in that: The adjustable positioning block (4) is an L-shaped structure consisting of a horizontal part (401) and a vertical part (403). The horizontal part (401) is fitted onto the outer surface of the positioning hand-tightening bolt (3) through a through hole (402), and the vertical part (403) is integrally formed with the horizontal part (401).

7. The positioning device for a nickel-iron alloy machining grinding machine according to claim 6, characterized in that: A hard indenter (404) is installed at the bottom of the vertical part (403), and the contact surface between the hard indenter (404) and the workpiece is spherical. The hard indenter (404) is made of polycrystalline cubic boron nitride material.

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