A fixture for machining the end face of a part

Abstract

A fixture for machining the end face of a part, belonging to the technical field of part machining. There are an upper plate and a lower plate on the bottom plate. The opposite surfaces of the upper plate and the lower plate have wedge-shaped surfaces. Chamfered surfaces are provided at the joints of the wedge-shaped surfaces and the upper surface of the upper plate or the lower surface of the lower plate. The width of the chamfered surface decreases from the discharge end to the feed end; the joint of the chamfered surface and the corresponding wedge-shaped surface forms a guiding line inclined from the discharge end to the feed end. The opposite surface of the lower plate and the upper plate has a plurality of working sections inclined from the discharge end to the feed end. The length of the working section is greater than the length of the part. The height of the discharge end of each working section is the same, the height of the feed end of each working section is the same, and the height-to-length ratio of each working section is 1:50. The present invention overcomes the deficiencies of the traditional fixture clamping method, has the advantages of simple and reasonable structure, fast and stable clamping, high-efficiency and fast replacement of parts, and low cost, high machining accuracy, wide application, and at the same time can meet the machining requirements of a variety of parts.

Description

Technical Field

[0001] The present invention relates to a fixture for machining the end face of a part, belonging to the technical field of part machining. Background Art

[0002] When machining the end face of non-magnetic materials such as copper, aluminum, and stainless steel whose end faces cannot be tightly pressed, soft jaws or V-shaped irons are used for clamping, and there are often situations where the clamping force is too large or too small. If the clamping force is too large, it is easy to cause deformation of the part; if the clamping force is too small, it is easy to cause unstable installation, and then the machined part fails to meet the design accuracy requirements, resulting in low machining efficiency and high rejection rate, affecting the production progress and machining cost of the enterprise. Summary of the Invention

[0003] To solve the problems in the background art, the present invention provides a fixture for machining the end face of a part.

[0004] To achieve the above object, the present invention adopts the following technical solution: A fixture for machining the end face of a part, including an upper plate, a bottom plate, and a lower plate; the upper surface of the bottom plate is provided with the upper plate and the lower plate, and a part placement space is formed between the upper plate and the lower plate, and the part placement space is used for placing and clamping the part.

[0005] Compared with the prior art, the beneficial effects of the present invention are:

[0006] The present invention overcomes the deficiencies of the traditional fixture clamping method, has the advantages of simple and reasonable structure, fast and stable clamping, high efficiency and speed in replacing parts, low cost, high machining accuracy, wide application, and can meet the machining requirements of various parts at the same time. Brief Description of the Drawings

[0007] Figure 1 is the structural schematic diagram of the present invention;

[0008] Figure 2 is Figure 1 the exploded view of;

[0009] Figure 3 is the structural schematic diagram of the upper plate;

[0010] Figure 4 is the structural schematic diagram of the lower plate;

[0011] Figure 5 is Figure 4 the front view of. Detailed Description of the Invention

[0012] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0013] A fixture for machining the end face of a part, comprising an upper plate 3, a bottom plate 4 and a lower plate 6; the upper surface of the bottom plate 4 is provided with the upper plate 3 and the lower plate 6, and a part placement space is formed between the upper plate 3 and the lower plate 6 for placing and clamping the part 1.

[0014] Both the upper plate 3 and the lower plate 6 are slidably and limit-fixedly connected to the bottom plate 4. Specifically, at least two parallel chutes 7 are provided at both the upper and lower ends of the bottom plate 4, and a slider 5 is provided in each chute 7. The two sides of the upper plate 3 and the two sides of the lower plate 6 are respectively fixedly connected to the corresponding sliders 5 through corresponding fixing bolts 2, which is convenient to meet the production requirements of parts of different sizes.

[0015] The opposite surfaces of the upper plate 3 and the lower plate 6 are both provided with wedge-shaped surfaces 8 inclined from the outside to the inside. The angles formed by the two wedge-shaped surfaces 8 corresponding to the upper surface of the upper plate 3 or the upper surface of the lower plate 6 are both α, and α = 61° ± 20°; chamfered surfaces 9 are provided at the joints between the wedge-shaped surfaces 8 and the upper surface of the upper plate 3 or the upper surface of the lower plate 6. The widths of the two chamfered surfaces 9 both decrease from the discharge end to the feed end; the angles formed by the two chamfered surfaces 9 corresponding to the upper surface of the upper plate 3 or the upper surface of the lower plate 6 are both β, and β = 150°; the connection between the chamfered surface 9 and the corresponding wedge-shaped surface 8 forms a guiding line 10, and the guiding line 10 is inclined from the discharge end to the feed end, so that while the part is laterally moved and clamped, a downward pressing guiding line is formed, enabling the part to better fit with the machining reference. The inclination angle of the guiding line 10 is δ, and δ = 0.02° - 0.03°.

[0016] The opposite surfaces of the lower plate 6 and the upper plate 3 are provided with a plurality of working sections 11. The length of each working section 11 is 10 - 20 mm longer than the length of the part 1. Each working section 11 is inclined from the discharge end to the feed end, and the heights of the discharge ends of each working section 11 are the same, the heights of the feed ends of each working section 11 are the same, and the height-to-length ratio of each working section 11 is 1:50. By providing a plurality of working sections, it is convenient to batch-process parts.

[0017] The upper surface of the bottom plate 4 is provided with a plurality of juxtaposed rectangular grooves 12. All of the plurality of rectangular grooves 12 are arranged along the moving direction of the part, and all of the plurality of rectangular grooves 12 are arranged within the part placement space. The rectangular grooves 12 can ensure that when the part 1 is installed on the bottom plate 4, while keeping the part stable, the contact area between the bottom plate 4 and the part 1 is minimized as much as possible, avoiding the influence on clamping due to local errors of the positioning surface of the part 1.

[0018] The thicknesses of the upper plate 3 and the lower plate 6 are both smaller than the thickness of the part 1 to ensure effective machining of the part, and the thicknesses of the upper plate 3 and the lower plate 6 are both greater than one-third of the part thickness to ensure effective clamping.

[0019] When machining the part, according to the actual size of the part 1, the relative positions of the upper plate 3 and the lower plate 6 on the bottom plate 4 are adjusted. After the adjustment is completed, the upper plate 3 and the lower plate 6 are fixed on the bottom plate 4 through the slider 5 and the fixing bolt 2. Then, the present invention is fixed on the machine tool, and the part 1 is pushed into the part placement space to start machining. During machining, the part 1 is gently slid along each working section of the fixture from the feeding end to the discharging end and slightly clamped in turn.

[0020] During the machining process, under the action of the cutting force, the part will lean against the small end of the discharging end of the wedge-shaped structure of the fixture. At the same time, under the action of the guiding line of the working surface of the fixture, when the part leans against the small end of the wedge-shaped structure of the fixture, there will be a tendency to lean against the lower positioning surface, ensuring the stable clamping of the part during the machining process.

[0021] The present invention is applicable to surface grinders, machining centers, etc. It can machine non-magnetic metal parts of regular and irregular shapes with a diameter within 100 mm and a thickness of 0.3 - 100 mm.

[0022] When using the present invention to machine easily deformable parts, the flatness accuracy: for a surface grinder, it can reach within 0.005 mm, and for a machining center, it can reach within 0.01 mm.

[0023] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent conditions of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0024] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fixture for machining the end face of a part, characterized in that: It includes an upper plate (3), a bottom plate (4) and a lower plate (6); the upper surface of the bottom plate (4) is provided with the upper plate (3) and the lower plate (6), and a part placement space is formed between the upper plate (3) and the lower plate (6), and the part placement space is used for placing and clamping parts (1); the opposite surfaces of the upper plate (3) and the lower plate (6) are both provided with wedge-shaped surfaces (8) that are inclined from the outside to the inside, and the angles formed by the two wedge-shaped surfaces (8) with the upper surface of the upper plate (3) or the upper surface of the lower plate (6) are both α. Chamfered surfaces (9) are provided at the joints of the wedge-shaped surfaces (8) with the upper surface of the upper plate (3) or the upper surface of the lower plate (6). The widths of the two chamfered surfaces (9) both decrease from the discharge end to the feed end; the angles formed by the two chamfered surfaces (9) with the upper surface of the upper plate (3) or the upper surface of the lower plate (6) are both β. The joint of the chamfered surface (9) and the corresponding wedge-shaped surface (8) constitutes a guiding line (10), and the guiding line (10) is inclined from the discharge end to the feed end. The upper surface of the bottom plate (4) is provided with a plurality of rectangular grooves (12) arranged in parallel; the upper plate (3) and the lower plate (6) are both slidably and limit-connected to the bottom plate (4), and both sides of the upper plate (3) and both sides of the lower plate (6) are respectively fixedly connected to the corresponding sliders (5) through the corresponding fixing bolts (2).

2. A fixture for machining the end face of a part according to claim 1, characterized in that: The opposite surfaces of the lower plate (6) and the upper plate (3) are provided with a plurality of working sections (11). The length of each working section (11) is greater than the length of the part (1). Each working section (11) is inclined from the discharge end to the feed end, and the heights of the discharge ends of each working section (11) are the same, the heights of the feed ends of each working section (11) are the same, and the height-to-length ratio of each working section (11) is 1:

50.

3. A fixture for machining the end face of a part according to claim 1 or 2, characterized in that: The plurality of rectangular grooves (12) are all arranged along the part movement direction, and the plurality of rectangular grooves (12) are all arranged in the part placement space.

4. A fixture for machining the end face of a part according to claim 1 or 2, characterized in that: The thicknesses of the upper plate (3) and the lower plate (6) are both less than the thickness of the part (1), and the thicknesses of the upper plate (3) and the lower plate (6) are both greater than one-third of the part thickness.

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