Positioning tool for gear cutter machining

Abstract

The positioning tool for gear cutter machining comprises a square frame seat, hydraulic cylinders are fixedly connected to the surface of the inner side of the square frame seat, the hydraulic cylinders are distributed and fixed to the surface of the inner side of the lower end of the square frame seat, and variable-diameter cylindrical ejector blocks are fixedly connected to the upper surfaces of the hydraulic cylinders. An expansion positioning block is installed on the upper surface of the square frame base in a sliding fit mode, an expansion extrusion protruding block is arranged on the surface of the upper end of the expansion positioning block, a variable-diameter extrusion cavity is formed in the inner end of the expansion positioning block and the inner end of the expansion extrusion protruding block, and the outer surface of the variable-diameter cylindrical ejector block is extruded on the inner side surface of the variable-diameter extrusion cavity. By the adoption of the expansion positioning block structure and the variable-diameter cylindrical ejection block structure with the lower end capable of being jacked, the expansion positioning blocks can be jacked up to slide and can be extruded outwards to expand outwards, after the expansion extrusion protruding blocks are sleeved with the gear cutters, the gear cutters can be extruded and fixed, positioning and installation are convenient and fast, and the gear cutters are not prone to falling off. The gear cutter is stable in positioning during machining.

Description

Technical Field

[0001] This utility model relates to the field of positioning fixtures for gear cutting tool processing, and more specifically, to a positioning fixture for gear cutting tool processing. Background Technology

[0002] Gear cutting tools are tools specifically designed for machining gears. They are mainly divided into two types: forming tools and generating tools. The tools used in forming tools include module milling cutters and finger milling cutters, while the tools used in generating tools include gear shapers, gear hobs, gear shaving cutters, etc.

[0003] The gear cutting tool manufacturing process is a crucial step in ensuring the accuracy and durability of gears. First, the structure and parameters of the gear must be carefully designed according to its functional requirements. Then, corresponding gear cutting tools are manufactured based on the design, and suitable machining tools are selected for pairing. During machining, various machining parameters, such as feed rate and depth of cut, should be strictly controlled to ensure machining efficiency and quality. The stability of the gear cutting tools needs to be improved, and the tools require positioning during machining. Since the gear cutting tools have a ring structure, positioning is inconvenient during external machining. Therefore, a positioning fixture for gear cutting tool machining is proposed. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide a positioning fixture for gear cutting tool processing. By adopting an expansion positioning block structure, and through a variable diameter cylindrical top block structure that can be lifted at the lower end, the expansion positioning block can be pushed outward to expand. After the gear cutting tool is sleeved on the expansion and pressing protrusion, it can be pressed and fixed. The positioning and installation are convenient and easy, and the positioning is stable during gear cutting tool processing.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A positioning fixture for gear cutting tool machining includes a square frame base. A hydraulic cylinder is fixedly connected to the inner surface of the square frame base. The hydraulic cylinder is distributed and fixed on the lower inner surface of the square frame base. A variable-diameter cylindrical top block is fixedly connected to the upper surface of the hydraulic cylinder. An expansion positioning block is slidably mounted on the upper surface of the square frame base. An expansion extrusion protrusion is provided on the upper surface of the expansion positioning block. A variable-diameter extrusion cavity is provided at the inner end of the expansion positioning block and the expansion extrusion protrusion. The outer surface of the variable-diameter cylindrical top block presses against the inner surface of the variable-diameter extrusion cavity. A positioning slide is provided on the lower surface of the expansion positioning block. The outer surface of the positioning slide is slidably connected to the upper inner surface of the square frame base. By adopting the expansion positioning block structure, and through the variable-diameter cylindrical top block structure that can be lifted at the lower end, the expansion positioning block can be lifted and slid outwards to expand. After the gear cutting tool is sleeved on the expansion extrusion protrusion, it can be extruded and fixed. The positioning and installation are convenient and efficient, and the positioning is stable during gear cutting tool machining.

[0007] Furthermore, the upper surface of the square frame is provided with a convex groove, and the positioning slide bar adopts a convex slide bar structure, with its outer surface slidably connected to the inner surface of the convex groove.

[0008] Furthermore, the surface of the square frame is provided with a circular insertion port, and the outer surface of the variable-diameter cylindrical top block is slidably connected to the inner surface of the circular insertion port.

[0009] Furthermore, the four sets of expansion positioning blocks are distributed on the upper surface of the square frame base, and the convex sliding grooves are distributed at the four corners of the upper end of the square frame base.

[0010] Furthermore, the outer surfaces of the expansion positioning block and the expansion extrusion protrusion are covered with a rubber layer.

[0011] Furthermore, the outer surface of the positioning slider is smooth and polished.

[0012] Furthermore, the inner surface of the convex groove on the upper surface of the square frame is smoothly polished.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] (1) By adopting an expansion positioning block structure, the variable diameter cylindrical top block structure that can be lifted at the lower end can be lifted and slid, and the expansion positioning block can be squeezed outward to expand. After the gear cutter is sleeved on the expansion and squeezing protrusion, it can be squeezed and fixed, making positioning and installation convenient and easy, and the positioning of the gear cutter is stable during processing. Attached Figure Description

[0015] Figure 1 This is a first schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a second schematic diagram of the overall structure of this utility model;

[0017] Figure 3 This is a third schematic diagram of the overall structure of this utility model;

[0018] Figure 4 This is a schematic cross-sectional view of the overall structure of this utility model;

[0019] Figure 5 This is a first schematic diagram of the expansion positioning block of this utility model;

[0020] Figure 6 This is a schematic diagram showing the distribution relationship between the expansion positioning block and the positioning slide bar of this utility model.

[0021] Explanation of the labels in the diagram:

[0022] 1. Square frame base, 2. Hydraulic cylinder, 3. Variable diameter cylindrical top block, 4. Expansion positioning block, 5. Expansion extrusion protrusion, 6. Variable diameter extrusion cavity, 7. Positioning slide bar, 8. Convex slide groove, 9. Circular interlocking port. 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] Example 1

[0025] Please see Figure 1-6 A positioning fixture for gear cutting tool processing includes a square frame 1. A hydraulic cylinder 2 is fixedly connected to the inner surface of the square frame 1. (A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, used to achieve linear reciprocating motion or oscillating motion. The hydraulic cylinder is the core actuator in a hydraulic system, responsible for efficiently converting hydraulic energy into mechanical energy to achieve linear reciprocating motion or oscillating motion. It has a simple structure, reliable operation, and is widely used in various mechanical equipment. The working principle of the hydraulic cylinder is based on the basic principle of hydraulic transmission, that is, using oil as the working medium to transmit motion and power through changes in the sealed volume. The output force of the hydraulic cylinder is closely related to the effective working area of ​​the piston and the pressure difference between the two sides. This is existing technology; the control part of the hydraulic cylinder 2 is also existing technology.) The hydraulic cylinder 2 is distributed and fixed on the square frame. The lower inner surface of the square frame 1 and the upper surface of the hydraulic cylinder 2 are fixedly connected to a variable diameter cylindrical top block 3. An expansion positioning block 4 is slidably installed on the upper surface of the square frame 1. An expansion extrusion protrusion 5 is provided on the upper surface of the expansion positioning block 4. A variable diameter extrusion cavity 6 is provided at the inner end of the expansion positioning block 4 and the expansion extrusion protrusion 5. The outer surface of the variable diameter cylindrical top block 3 is pressed against the inner surface of the variable diameter extrusion cavity 6. A positioning slide 7 is provided on the lower surface of the expansion positioning block 4. The outer surface of the positioning slide 7 is slidably connected to the upper inner surface of the square frame 1. By adopting the expansion positioning block structure, the variable diameter cylindrical top block structure that can be lifted at the lower end can be lifted and slid outward to expand the expansion positioning block. After the gear cutter is sleeved on the expansion extrusion protrusion, it can be extruded and fixed. The positioning and installation are convenient and easy, and the positioning of the gear cutter is stable during processing.

[0026] The upper surface of the square frame 1 is provided with a convex groove 8, and the positioning slide 7 adopts a convex slide structure. The outer surface of the positioning slide 7 is slidably connected to the inner surface of the convex groove 8. The positioning slide 7 can be positioned and slid in the convex groove 8, which facilitates sliding movement during extrusion.

[0027] The surface of the square frame 1 is provided with a circular through-hole 9, and the outer surface of the variable diameter cylindrical top block 3 is slidably connected to the inner surface of the circular through-hole 9; it can be inserted and positioned along the circular through-hole 9, which facilitates the lifting and extrusion of the variable diameter cylindrical top block 3;

[0028] Four sets of expansion positioning blocks 4 are distributed on the upper surface of the square frame base 1, and convex sliding grooves 8 are distributed at the four corners of the upper end of the square frame base 1. When the gear cutter is sleeved on the expansion and extrusion protrusion 5, the expansion positioning blocks 4 drive the expansion and provide stable support, and the expansion and extrusion are firmly fixed.

[0029] The outer surfaces of the expansion positioning block 4 and the expansion extrusion protrusion 5 are covered with a rubber layer to increase friction. After the gear cutter is sleeved on the expansion extrusion protrusion 5, the friction can be increased and the surface of the gear cutter will not be worn.

[0030] The outer surface of the positioning slider 7 is smoothly polished; when sliding, the friction is small and it is not easy to get clogged.

[0031] The inner surface of the convex groove 8 on the upper surface of the square frame 1 is smoothly polished; when sliding, the friction is small and it is not easy to get blocked.

[0032] In use, an expansion positioning block 4 is slidably mounted on the upper surface of the square frame 1. An expansion extrusion protrusion 5 is provided on the upper surface of the expansion positioning block 4, allowing the gear cutter to be sleeved on the outer surface of the expansion extrusion protrusion 5. Its lower surface is supported and placed on the upper surface of the expansion positioning block 4. For fixing, a hydraulic cylinder 2 is fixedly connected to the inner surface of the square frame 1. The hydraulic cylinder 2 is distributed and fixedly located on the lower inner surface of the square frame 1. A variable-diameter cylindrical top block 3 is fixedly connected to the upper surface of the hydraulic cylinder 2. A variable-diameter extrusion protrusion is provided at the inner end of the expansion positioning block 4 and the expansion extrusion protrusion 5. In cavity 6, the outer surface of the variable diameter cylindrical top block 3 is pressed against the inner surface of the variable diameter extrusion cavity 6. During use, the variable diameter cylindrical top block 3 is raised by the hydraulic cylinder 2, pressing against the inner end of the variable diameter extrusion cavity 6. As the variable diameter cylindrical top block 3 rises, it can expand and extrude the expansion positioning block 4 outward, causing the expansion positioning block 4 to slide outward. This causes the expansion extrusion protrusion 5 to slide outward, thus pressing and locking the gear cutter after it is sleeved. The lower surface of the expansion positioning block 4 is provided with a positioning slide 7, and the outer surface of the positioning slide 7 is slidably connected to the square The upper inner surface of the rectangular frame 1; the upper surface of the rectangular frame 1 is provided with a convex groove 8, and the positioning slide 7 adopts a convex slide structure, with its outer surface slidably connected to the inner surface of the convex groove 8; the positioning slide 7 can be positioned and slid within the convex groove 8, facilitating sliding movement during extrusion; it can provide movable positioning support, and four sets of expansion positioning blocks 4 are distributed on the upper surface of the rectangular frame 1, with the convex groove 8 distributed at the four corners of the upper end of the rectangular frame 1; the four sets of expansion positioning blocks 4 are distributed, and when in use, they are sleeved on the expansion... When the extrusion protrusion 5 is stretched outward, the expansion positioning block 4 drives it to expand, providing stable support and ensuring a firm expansion and extrusion fixation. At the same time, the positioning slide 7 and the convex slide groove 8 are polished and ground. When they slide and rub against each other, the friction can be reduced, and the sliding is smooth without jamming or blocking. The positioning is convenient, with single-point upward extrusion and multi-point expansion and fixation. The structure is simple and convenient while being firmly fixed. When disassembling, the downward contraction of the variable diameter cylindrical top block 3 descends, which can descend into the variable diameter extrusion chamber 6, allowing the expansion extrusion protrusion 5 and the expansion positioning block 4 to slide back and be pulled out. The gear cutter is easy to remove and assemble.

[0033] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A positioning fixture for gear cutting tool machining, comprising a square frame (1), characterized in that: A hydraulic cylinder (2) is fixedly connected to the inner surface of the square frame (1). The hydraulic cylinder (2) is distributed and fixed on the lower inner surface of the square frame (1). A variable diameter cylindrical top block (3) is fixedly connected to the upper surface of the hydraulic cylinder (2). An expansion positioning block (4) is slidably installed on the upper surface of the square frame (1). An expansion extrusion protrusion (5) is provided on the upper surface of the expansion positioning block (4). A variable diameter extrusion cavity (6) is provided at the inner end of the expansion positioning block (4) and the expansion extrusion protrusion (5). The outer surface of the variable diameter cylindrical top block (3) is pressed against the inner surface of the variable diameter extrusion cavity (6). A positioning slide (7) is provided on the lower surface of the expansion positioning block (4). The outer surface of the positioning slide (7) is slidably connected to the upper inner surface of the square frame (1).

2. The positioning fixture for gear cutting tool machining according to claim 1, characterized in that: The upper surface of the square frame (1) is provided with a convex groove (8), and the positioning slide (7) adopts a convex slide structure. The outer surface of the positioning slide (7) is slidably connected to the inner surface of the convex groove (8).

3. The positioning fixture for gear cutting tool machining according to claim 1, characterized in that: The square frame base (1) has a circular through-hole (9) on its surface, and the outer surface of the variable diameter cylindrical top block (3) is slidably connected to the inner surface of the circular through-hole (9).

4. A positioning fixture for gear cutting tool machining according to claim 2, characterized in that: The expansion positioning blocks (4) are arranged in four groups on the upper surface of the square frame base (1), and the convex sliding grooves (8) are arranged at the four corners of the upper end of the square frame base (1).

5. A positioning fixture for gear cutting tool machining according to claim 1, characterized in that: The outer surfaces of the expansion positioning block (4) and the expansion extrusion protrusion (5) are covered with a rubber layer.

6. A positioning fixture for gear cutting tool machining according to claim 1, characterized in that: The outer surface of the positioning slider (7) is smooth and polished.

7. A positioning fixture for gear cutting tool machining according to claim 2, characterized in that: The inner surface of the convex groove (8) on the upper surface of the square frame (1) is smooth and polished.

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