Double-station self-centering flexible machining center clamp

Abstract

The utility model belongs to the field of tool clamp design in numerical control machining and manufacturing, and particularly relates to a double-station self-centering flexible machining center clamp. A plurality of clamping stations cannot be distributed on the plane of a working table of small five-coordinate equipment due to the limitation of the size of the working table of a machine tool, and the clamping stations are repeatedly replaced on the machine tool surface, so that the effective operation efficiency of the equipment is reduced. The device comprises a support, a vice, a positioning mounting plate and a pressing plate, the support is provided with a pair of supporting surfaces which are arranged in a mirror image mode and have outward normal lines, and the supporting surfaces form an included angle of 45 degrees relative to the horizontal plane; the vice is positioned and mounted on a supporting surface; and the positioning and mounting plate is positioned and mounted on the other supporting surface, bolt holes distributed in a matrix are formed in the positioning and mounting plate, and clamping is carried out through a pressing plate. Multi-platform clamping and mounting are achieved, quick replacement is efficiently achieved, the production preparation time for repeated replacement of the vice and the pressing plate bottom plate on the machine tool surface is saved, and the effective operation efficiency of equipment is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of tooling and fixture design in CNC machining and manufacturing, specifically relating to a dual-station self-centering flexible machining center fixture. Background Technology

[0002] A fixture is a device used in mechanical manufacturing to fix a workpiece in the correct position for operation or inspection. In a broader sense, any device used to quickly, conveniently, and safely install a workpiece at any stage of the manufacturing process can be called a fixture.

[0003] Existing multi-station fixture designs typically involve installing two or more fixture devices on the machine's worktable to clamp two or more products, similar to arranging and processing multiple products together. However, for most small five-axis CNC machines, the size of the machine tool's worktable limits the ability to distribute multiple clamping stations on the worktable surface.

[0004] Analysis of the characteristics of small five-axis CNC machining centers for aerospace structural parts revealed that the vast majority of these products are machined in two coordinate systems. The first coordinate system is clamped by a vise, and the second coordinate system is clamped by a pressure plate. Due to the limited bed size of the small five-axis CNC machining center, the vise and pressure plate base plate need to be repeatedly changed on the bed during the machining process in both coordinate systems. This increases the production preparation time during the product machining process and reduces the effective operating efficiency of the equipment. Utility Model Content

[0005] This utility model provides a repositionable, self-centering flexible machining center fixture that meets the requirements of clamping small five-axis machining center products with a vise in one coordinate system and a pressure plate in two coordinate systems, and solves the problem of repeatedly replacing the vise and the pressure plate base plate on the machine tool bed during product processing.

[0006] This utility model proposes a dual-station self-centering flexible machining center fixture, which is positioned and installed in a five-axis machining center. It includes a support, a vise, a positioning mounting plate, and a pressure plate. The support has a pair of support surfaces arranged in a mirror image with their normals pointing outwards. The support surfaces have an included angle of 45° with respect to the horizontal plane. The vise is positioned and installed on one support surface. The positioning mounting plate is positioned and installed on the other support surface. The positioning mounting plate has a matrix of bolt holes, and clamping is achieved by the pressure plate.

[0007] Advantageously, the vise is positioned and clamped on the support surface by a pair of positioning clamping bolts; the positioning mounting plate is positioned and clamped on the support surface by a pair of positioning clamping bolts, and the positioning mounting plate also has several clamping through holes.

[0008] Advantageously, the vise and the positioning mounting plate have upper positioning bolt holes, which are stepped holes with a large-diameter countersunk hole at the upper end to accommodate the bolt head and a small-diameter through hole at the lower end to form an upper positioning surface.

[0009] Advantageously, the support surface has a lower positioning bolt hole, the upper end of which is countersunk to form a lower positioning surface, and the lower end is a threaded hole.

[0010] Advantageously, the positioning clamping bolt includes a bolt head and a stepped rod portion, with the upper smooth rod serving as a positioning rod and the lower part being a threaded rod.

[0011] Advantageously, the positioning mounting plate also has 3 clamping through holes.

[0012] Advantageously, the vise is mounted at the center of the support surface, and a coaxial clamping base is mounted on the vise.

[0013] Advantageously, the pressure plate is mounted on the positioning mounting plate by bolts.

[0014] Advantageously, the positioning mounting plate is also provided with precision holes, which are fixed to the rotational torque of the flexible machining center.

[0015] Beneficial effects: Make full use of equipment space, fix the vise and the pressure plate base plate on a 45-degree plane through the clamp support, and realize the function of vise and pressure plate clamping in the machining of small five-axis products. That is, multi-platform clamping and installation, efficient quick change, saving the production preparation time of repeatedly changing the vise and pressure plate base plate on the machine tool bed, and effectively improving the effective operating efficiency of the equipment.

[0016] This design is simple in structure, easy to manufacture, low in cost, and highly applicable, effectively solving the processing of similar products in small batches with multiple varieties.

[0017] The features, functionalities, and advantages already discussed can be implemented independently in various examples, or combined in other examples. Further details of the examples can be seen in the following description and accompanying figures. Attached Figure Description

[0018] When read in conjunction with the accompanying drawings, the embodiments, preferred modes of use, other objects, and descriptions thereof will be best understood by referring to the following detailed description of the embodiments of the present invention, wherein:

[0019] Figure 1 A schematic diagram of the overall structure of a dual-station self-centering flexible machining center fixture;

[0020] Figure 2 This is a side view of a dual-station self-centering flexible machining center fixture.

[0021] Figure 3 This is a schematic diagram of the mounting plate;

[0022] Figure 4 A sectional view of the positioning and clamping mechanism;

[0023] Figure 5 This is a schematic diagram of the machining process in the first coordinate system;

[0024] Figure 6 This is a schematic diagram of the machining process in the second coordinate system.

[0025] 1-Support, 2-Visher, 3-Positioning mounting plate, 4-Positioning clamping bolt, 5-Upper positioning bolt hole, 6-Upper positioning surface, 7-Threaded rod, 8-Clamping base, 9-Pressure plate, 10-Lower positioning bolt hole, 11-Lower positioning surface Detailed Implementation

[0026] The disclosed examples will be described more fully with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples may be described, and these examples should not be construed as limited to those set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0027] This utility model provides a dual-station self-centering flexible machining center fixture, comprising a support 1, whose two supporting surfaces are fixed at 45° to the horizontal plane, respectively used to support a vise 2 and a positioning mounting plate 3, making full use of limited space. Two lower positioning bolt holes 10 for fixing the vise 2 are machined on one supporting surface, serving both positioning and clamping purposes; bolt holes for fixing the mounting plate 3 are machined on the other supporting surface, two of which are lower positioning bolt holes 10. The upper part of the lower positioning bolt hole 10 is a lower positioning hole 11, and the lower part is a threaded hole that mates with the threaded rod 7 of the positioning clamping bolt 4. The lower positioning hole forms the lower positioning surface 11, serving both positioning and clamping purposes; the other bolt holes only serve a clamping function. The positioning clamping bolt 4, used to fix the vise 2 and the mounting plate 3, has a cylindrical surface for positioning and a threaded portion for clamping.

[0028] Two upper positioning bolt holes 5 are machined on the vise 2. The upper positioning bolt holes 5 are stepped holes, with a large-diameter countersunk hole at the upper end to accommodate the bolt head and a small-diameter through hole at the lower end to form the upper positioning surface (6). The vise is installed at the center of the support surface and is a standard vise. The center of the vise is at 45° to the rotation distance of the machine tool to ensure automatic centering and clamping in the later stage. The vise is installed at the center of the support surface. After the vise is installed, when the product is clamped, the vise jaws tighten synchronously on both sides, which can effectively ensure that the product is clamped in the center position of the vise. Therefore, the product positioning can be quickly achieved by normal alignment.

[0029] The positioning mounting plate 3 has two upper positioning bolt holes 5 and three clamping through holes machined on it. Other areas have standard M12 bolt holes distributed in a 50mm matrix for easy product clamping. The design of the positioning mounting plate 3 considers the relationship between the hole center and the machine tool's rotational torque to achieve rapid positioning after clamping. The positioning mounting plate 3 also has precision holes, all marked with coordinates X1, Y1… (not shown). After the positioning mounting plate 3 is installed, the precision holes are fixed to the rotational torque of the flexible machining center, allowing for automatic centering and rapid alignment of the product after clamping via coordinate positioning. The positioning mounting plate 3 integrates a quick-change and clamping positioning system, enabling rapid clamping of different tooling.

[0030] See Figure 5 First, rotate the machine bed (turntable) inward by 45 degrees, use vise 2 on one of the workstations to clamp the part, set the X, Y, and Z axes according to the workpiece coordinate system, clear the C and A axes to 0 and align the coordinate system, and start machining the part.

[0031] See Figure 6 Remove the part from the vise, return the machine bed (turntable) to the center, rotate it outwards by 45 degrees, and clamp it onto the base plate of station two using pressure plate 9. Set X, Y, and Z according to the workpiece coordinate system, clear C and A axes to 0 and align the coordinate system, and begin machining the part.

[0032] After machining, remove the parts and continue machining the subsequent parts according to this process.

[0033] This utility model fixture features two 45-degree clamping surfaces, a simple structure, and easy manufacturing. It simultaneously performs vise and pressure plate clamping functions, making full use of the limited space of the equipment. It meets the needs of a small five-axis machining center requiring simultaneous vise and pressure plate clamping during the machining of products in two coordinate systems, achieving dual-station clamping. This saves time spent repeatedly changing different clamping mechanisms during product processing, improving the effective operating efficiency of the equipment. Specifically, it is applied to clamping solutions for CNC machining of similar connecting parts.

[0034] Descriptions of various advantageous arrangements have been shown for illustrative and descriptive purposes, but such descriptions are not intended to be exclusive or limited to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. Furthermore, different advantageous examples may be described as having different advantages compared to other advantageous examples. One or more examples have been selected and described in order to best illustrate the principles and practical applications of the examples, and to enable those skilled in the art to understand that this disclosure contains various examples with various modifications suitable for the particular intended use.

Claims

1. A dual-station self-centering flexible machining center fixture, characterized in that: The fixture is positioned and installed in a five-axis machining center and includes a support (1), a vise (2), a positioning mounting plate (3), and a pressure plate (9). The support (1) has a pair of support surfaces arranged in a mirror image with the normals pointing outwards. The support surfaces have an angle of 45° with respect to the horizontal plane. The vise (2) is positioned and installed on one support surface. The positioning mounting plate (3) is positioned and installed on the other support surface. The positioning mounting plate (3) has a matrix of bolt holes and is clamped by the pressure plate (9).

2. The dual-station self-centering flexible machining center fixture according to claim 1, characterized in that: The vise (2) is positioned and clamped on the support surface by a pair of positioning clamping bolts (4); the positioning mounting plate (3) is positioned and clamped on the support surface by a pair of positioning clamping bolts (4), and the positioning mounting plate (3) also has several clamping through holes.

3. The dual-station self-centering flexible machining center fixture according to claim 2, characterized in that: The vise (2) and the positioning mounting plate (3) have upper positioning bolt holes (5), which are stepped holes. The upper large-diameter countersunk hole accommodates the bolt head, and the lower small-diameter through hole forms the upper positioning surface (6).

4. The dual-station self-centering flexible machining center fixture according to claim 3, characterized in that: The support surface has a lower positioning bolt hole (10), the upper end of which is countersunk to form a lower positioning surface (11), and the lower end is a threaded hole.

5. The dual-station self-centering flexible machining center fixture according to claim 4, characterized in that: The positioning clamping bolt (4) includes a bolt head and a stepped rod, with the upper smooth rod serving as a positioning rod and the lower part being a threaded rod (7).

6. The dual-station self-centering flexible machining center fixture according to claim 5, characterized in that: The positioning mounting plate (3) also has 3 clamping through holes.

7. The dual-station self-centering flexible machining center fixture according to claim 6, characterized in that: The vise (2) is installed at the center of the support surface, and a coaxial clamping base (8) is installed on the vise (2).

8. The dual-station self-centering flexible machining center fixture according to claim 7, characterized in that: The pressure plate (9) is mounted on the positioning mounting plate (3) by bolts.

9. The dual-station self-centering flexible machining center fixture according to claim 8, characterized in that: The positioning mounting plate (3) is also provided with precision holes, which are fixed to the rotational torque of the flexible machining center.

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