Fixture design method for net-shaped hollowed-out part

Abstract

The invention discloses a clamp design method for a net-shaped hollowed-out part, and relates to the technical field of machining, and the clamp design method comprises the steps that a clamp is designed according to the shape of the net-shaped hollowed-out part, and the clamp is designed to be provided with a part main contact surface matched with the shape of the net-shaped hollowed-out part; a plurality of bosses used for clamping ribs of the net-shaped hollowed-out part are arranged on the main contact face of the part. The clamping efficiency and the machining efficiency are improved, production equipment does not need to be additionally arranged, circulation procedures are reduced, and the lean production level is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of fixture design, and in particular to a fixture design method for a mesh hollow part. Background Art

[0002] With the continuous development of industrial technology, especially the progress of the aviation industry, high-strength, lightweight and complex-shaped supporting parts are increasingly widely used. However, it is very troublesome to clamp mesh, hollow and thin-walled parts during processing. The common feature of mesh, hollow and thin-walled parts is poor rigidity. Frequent pauses are required during processing to increase the clamping force to prevent the parts from being torn or broken due to the poor structure of the parts themselves. The entire processing process is extremely cumbersome, which reduces production efficiency and product yield.

[0003] Therefore, technicians in this field are committed to developing a fixture design method for a mesh hollow part to overcome the problems existing in the prior art. Summary of the invention

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that the clamping of mesh, hollow and thin-walled parts during processing is very troublesome and requires frequent pauses to add pressure plates for fixation, which makes the entire processing process extremely cumbersome.

[0005] To achieve the above object, the present invention provides a method for designing a fixture for a mesh hollow part, which is characterized by comprising the following steps:

[0006] Step 1, designing a fixture according to the shape of the mesh hollow part, wherein the fixture is designed to have a main contact surface of the part matching the shape of the mesh hollow part;

[0007] Step 2: multiple bosses are arranged on the main contact surface of the part to clamp the ribs of the mesh hollow part.

[0008] Furthermore, the step 2 includes: when the mesh hollow part is a planar structure, four bosses are symmetrically arranged around the intersection of the four ribs, so that each rib can be clamped by two bosses relative to each other.

[0009] Furthermore, the step 2 includes: setting each boss to be in a rectangular parallelepiped shape.

[0010] Furthermore, the step 2 includes: when the mesh hollow part is a curved surface or a contoured structure, three bosses are alternately arranged on both sides of each rib, so that each rib can be alternately clamped by the three bosses.

[0011] Furthermore, the step 2 also includes: designing the three bosses to have equal spacing.

[0012] Furthermore, the step 2 also includes: designing the three bosses to have unequal spacings.

[0013] Furthermore, the step 2 also includes: setting the middle boss to be in a rectangular parallelepiped shape.

[0014] Furthermore, the step 2 also includes: constructing the bosses on both sides and the bosses corresponding to the adjacent ribs into a group of L-shaped boss combinations.

[0015] Furthermore, the step 2 also includes: setting a clearance groove on the main contact surface of the part below the rib facing each boss.

[0016] Furthermore, the step 2 also includes: arranging a group of L-shaped boss combinations and another group of adjacent L-shaped boss combinations to be symmetrical about the intersection of the four ribs.

[0017] The beneficial effects of the present invention are as follows: the clamping efficiency and the processing efficiency are both improved by more than 2 times, there is no need to increase production equipment, the circulation process is reduced, and the lean production level is greatly improved.

[0018] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a traditional clamping diagram of a mesh hollow part;

[0020] Figure 2 It is a schematic diagram of clamping a planar structure mesh hollow part according to a preferred embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of a fixture for a planar structure mesh hollow part according to a preferred embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of clamping a mesh hollow part with a curved surface structure according to a preferred embodiment of the present invention;

[0023] Figure 5 It is a schematic diagram of a fixture for a mesh hollow part with a curved surface structure according to a preferred embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of clamping a mesh hollow part according to a preferred embodiment of the present invention;

[0025] Figure 7 It is a schematic diagram of a fixture for a mesh hollow part according to a preferred embodiment of the present invention.

[0026] Among them, 1-net-shaped hollow part, 2-pressing plate, 3-clamp, 4-main contact surface of part, 5-rib, 6-boss, 7-boss combination, 8-avoidance groove. DETAILED DESCRIPTION

[0027] The following describes the preferred embodiments of the present invention with reference to the drawings in the specification, so that the technical content is clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

[0028] In the drawings, components with the same structure are indicated by the same numerical reference numerals, and components with similar structures or functions are indicated by similar numerical reference numerals. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of the components is appropriately exaggerated in some places in the drawings.

[0029] Traditional clamping of mesh hollow parts Figure 1 As shown, the mesh hollow part 1 includes a mesh structure composed of various ribs and their connected intersections. During the processing of the mesh hollow part 1, the processing is paused and the pressure plate 2 is gradually added. The pressure plate 2 is stuck on the edge of the mesh hollow part 1 or on two ribs of the mesh hollow part 1.

[0030] like Figure 2-7 As shown, the present invention provides a method for designing a fixture for a mesh hollow part, comprising the following steps:

[0031] The fixture 3 is designed according to the shape of the mesh hollow part 1, and the fixture 3 is designed to have a part main contact surface 4 that matches the shape of the mesh hollow part 1;

[0032] A plurality of bosses 6 for clamping the ribs 5 of the mesh hollow part 1 are arranged on the main contact surface 4 of the part, so as to limit the movement of the mesh hollow part 1 in all directions.

[0033] like Figure 2-3 As shown, when the mesh hollow part 1 is a planar structure, four bosses 6 are symmetrically arranged around the intersection of the four ribs 5, so that each rib 5 can be clamped by two bosses 6 relative to each other.

[0034] Preferably, each boss 6 is configured to be in a rectangular parallelepiped shape.

[0035] like Figure 4-5 As shown, when the mesh hollow part 1 is a curved surface or a contoured structure, three bosses 6 are alternately arranged on both sides of each rib 5 , so that each rib 5 can be alternately clamped by the three bosses 6 .

[0036] The three bosses 6 can be designed to have equal spacing. The three bosses 6 can also be designed to have unequal spacing.

[0037] Preferably, the middle boss 6 is set to a rectangular parallelepiped shape. The bosses 6 on both sides and the bosses 6 corresponding to the adjacent ribs 5 are constructed into a group of L-shaped boss combinations 7. A clearance groove 8 can also be set on the main contact surface 4 of the part below the rib 5 facing each boss 6. The bottom of the mesh hollow part 1 with curved surface and contoured structure is a curved surface, and fillets will remain during processing, so it is necessary to design a clearance groove 8 to prevent interference.

[0038] Preferably, one group of L-shaped boss combinations and another group of adjacent L-shaped boss combinations are arranged symmetrically about the intersection of the four ribs to prevent interference.

[0039] Figure 6-7 A schematic diagram of the clamping and fixture of a mesh hollow part 1 actually used is shown.

[0040] After using this clamp 3, the mesh hollow part 1 can only move up and down, and the entire processing can be completed by changing the clamp 3 only once. The clamping efficiency and processing efficiency are improved by more than 2 times. There is no need to increase production equipment, reduce the circulation process, and greatly improve the level of lean production.

[0041] The preferred specific embodiments of the present invention are described in detail above. It should be understood that ordinary technicians in the field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by technicians in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A method for designing a fixture for a mesh hollow part, characterized in that: The following steps are involved: Step 1, designing a fixture according to the shape of the mesh hollow part, wherein the fixture is designed to have a main contact surface of the part matching the shape of the mesh hollow part; Step 2: multiple bosses are arranged on the main contact surface of the part to clamp the ribs of the mesh hollow part.

2. The method for designing a fixture for a mesh hollow part according to claim 1, characterized in that: The step 2 comprises: when the mesh hollow part is a planar structure, four bosses are symmetrically arranged around the intersection of the four ribs, so that each rib can be clamped by two bosses relative to each other.

3. The method for designing a fixture for a mesh hollow part according to claim 2, characterized in that: The step 2 comprises: setting each boss into a rectangular parallelepiped shape.

4. The method for designing a fixture for a mesh hollow part according to claim 1, characterized in that: The step 2 comprises: when the mesh hollow part is a curved surface or a contoured structure, three bosses are alternately arranged on both sides of each rib, so that each rib can be alternately clamped by the three bosses.

5. The method for designing a fixture for a mesh hollow part according to claim 4, characterized in that: The step 2 also includes: designing the three bosses to have equal spacing.

6. The method for designing a fixture for a mesh hollow part according to claim 4, characterized in that: The step 2 also includes: designing the three bosses to have unequal spacings.

7. The method for designing a fixture for a mesh hollow part according to claim 5 or 6, characterized in that: The step 2 also includes: setting the middle boss into a rectangular parallelepiped shape.

8. The method for designing a fixture for a mesh hollow part according to claim 4, characterized in that: The step 2 also includes: constructing the bosses on both sides and the bosses corresponding to the adjacent ribs into a group of L-shaped boss combinations.

9. The method for designing a fixture for a mesh hollow part according to claim 4, characterized in that: The step 2 also includes: setting a clearance groove on the main contact surface of the part below the rib facing each boss.

10. The method for designing a fixture for a mesh hollow part according to claim 8, characterized in that: The step 2 also includes: arranging a group of L-shaped boss combinations and another group of adjacent L-shaped boss combinations to be symmetrical about the intersection of the four ribs.

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