Thin-wall workpiece surface machining clamp

Abstract

The invention discloses a thin-wall workpiece surface machining clamp which comprises a horizontally-arranged base plate, a workpiece containing area is arranged on the base plate, at least three edge clamping assemblies are arranged on the base plate, all the edge clamping assemblies are arranged around the workpiece containing area, a plurality of inner supports are further arranged in the workpiece containing area, and the inner supports are arranged on the edge clamping assemblies. A suction cup is further arranged in the workpiece containing area. The base plate is further provided with a negative pressure generating device, and the negative pressure generating device is connected with the suction cups. The method has the remarkable effects that pressure points on the processing surface of the sheet-shaped thin-wall part are reduced, the processing surface is prevented from being excessively shielded, the processing surface of the sheet-shaped thin-wall part can be completely processed at one time, and processing parameters and processing quality are relatively easy to control; and a plurality of clamps are not needed, so that the cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing, and in particular to a processing fixture for sheet-shaped thin-walled parts. Background Art

[0002] Since sheet-like thin-walled parts have low strength, they are easily deformed and bulged under pressure. When they need to be processed at certain points, a support-clamping mechanism can be set at the parts that do not need to be processed to ensure that the sheet-like thin-walled parts can remain basically stable during machining. However, when there are many points that need to be processed or they need to be processed on the surface, it is difficult to plan and set the clamping parts on the processing surface (upper surface) of the sheet-like thin-walled parts. If necessary, it is necessary to set up multiple different fixtures to switch the clamping parts and leak out the processing positions. There are two problems with this solution. First, multiple fixtures need to be set up, which increases the economic and processing time costs; second, after multiple fixtures are switched, the processing parameters are difficult to synchronize, and the processing quality control is difficult. Summary of the invention

[0003] The present invention provides a method for maintaining the stability of a sheet-like thin-walled part during machining by negative pressure adsorption. The main technical solutions adopted are as follows:

[0004] A thin-walled workpiece surface processing fixture, the key of which is: comprising a horizontally arranged substrate, a workpiece placement area is arranged on the substrate, at least three edge clamping assemblies are arranged on the substrate, all of the edge clamping assemblies are arranged around the workpiece placement area, a plurality of internal supports are also arranged in the workpiece placement area, and a suction cup is also arranged in the workpiece placement area;

[0005] The substrate is also provided with a negative pressure generating device, which is connected to the suction cup.

[0006] The sheet-like thin-walled parts are placed in the workpiece placement area, and the inner support and suction cup are both located below the sheet-like thin-walled parts. The inner support plays a supporting role from bottom to top, and the suction cup plays a "pressing" role from top to bottom. The upper surface (processing surface) of the sheet-like thin-walled parts is not blocked except for a small amount of obstruction at the position corresponding to the edge clamping component. The processing surface of the sheet-like thin-walled parts can be processed all at once, and the processing parameters and processing quality are relatively easy to control. There is no need to set up multiple fixtures, which reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0008] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0009] Figure 3 It is a schematic cross-sectional structure diagram of the negative pressure generating device 5. DETAILED DESCRIPTION

[0010] The present invention is further described below in conjunction with embodiments and drawings.

[0011] like Figure 1 , Figure 2 and Figure 3 As shown, a thin-walled surface processing fixture includes a horizontally arranged substrate 1, on which a workpiece placement area is provided, and the workpiece placement area is planned and arranged according to the shape of the workpiece to be processed. At least three edge clamping components 2 are provided on the substrate 1, and all of the edge clamping components 2 are arranged around the workpiece placement area. A plurality of internal supports 3 are also provided in the workpiece placement area, and the number and position of the internal supports 3 are arranged according to the planned and designed support points; a suction cup 4 is also provided in the workpiece placement area, and the number and position of the suction cup 4 are arranged according to the planned and designed adsorption points; the substrate 1 is also equipped with a negative pressure generating device 5, and the negative pressure generating device 5 is connected to the suction cup 4.

[0012] The edge clamping assembly 2 includes an edge support seat 21 and an edge pressing assembly 22, and the pressing portion of the edge pressing assembly 22 is located directly above the corresponding edge support seat 21. The edge pressing assembly 22 includes a pressing cylinder 221, a flip mechanism 222 and a pressing arm 223. A cylinder mounting through hole is provided on the substrate 1 corresponding to the pressing cylinder 221. The cylinder barrel of the pressing cylinder 221 is fixed to the lower surface of the substrate 1. The cylinder barrel of the pressing cylinder 221 passes upward through the cylinder mounting through hole. The piston rod of the pressing cylinder 221 extends upward. The upper end of the piston rod of the pressing cylinder 221 is connected to the flip mechanism 222. The flip mechanism 222 is connected to the pressing arm 223. One end of the pressing arm 223 is located directly above the corresponding edge support seat 21.

[0013] An inner support mounting hole is provided on the substrate 1 corresponding to the inner support 3 , the inner support 3 is located in the inner support mounting hole, and the inner support 3 is fixed to the lower surface of the substrate 1 ; the top ends of all the inner supports 3 are located in the same horizontal plane.

[0014] The suction cup 4 includes a cushion block 41, a negative pressure suction hole is provided on the upper surface of the cushion block 41, and a sealing ring 42 is provided on the upper surface of the cushion block 41 around the negative pressure suction hole; the level of the top end of the inner support 3 is between the level of the top end of the cushion block 41 and the level of the top end of the sealing ring 42. The sealing ring 42 is a rubber ring.

[0015] The negative pressure generating device 5 is arranged on the lower surface of the substrate 1; the negative pressure generating device 5 comprises a seat body 51, the seat body 51 is penetrated with a stepped hole, the stepped hole comprises a small diameter hole 5a and a large diameter hole 5b, the center lines of the small diameter hole 5a and the large diameter hole 5b coincide with each other, and the seat body 51 is further provided with a vacuum hole 5c, the vacuum hole 5c is communicated with the large diameter hole 5b, and the vacuum hole 5c is close to the small diameter hole 5a;

[0016] A positive pressure tube 52 is inserted into the large diameter hole 5b. The outer diameter of the positive pressure tube 52 is smaller than the inner diameter of the small diameter hole 5a. The inlet end of the positive pressure tube 52 is located outside the large diameter hole 5b, and the outlet end of the positive pressure tube 52 is close to the small diameter hole 5a.

[0017] The outer fixed sleeve of the positive pressure tube 52 is provided with two sealing plugs 53, the sealing plugs 53 are located in the large diameter hole 5b, the sealing plugs 53 are tightly pressed against the hole wall of the large diameter hole 5b, one of the sealing plugs 53 is close to the outer end of the large diameter hole 5b, and the other sealing plug 53 is close to the vacuum hole 5c, and the vacuum hole 5c is located between the inner end of the small diameter hole 5a and the sealing plug 53 close thereto;

[0018] The outer end of the positive pressure tube 52 is connected to a positive pressure gas source through a pipeline; the vacuum hole 5c is connected to the negative pressure suction hole through a pipeline.

[0019] Beneficial effects: The thin-walled component surface processing fixture of the present invention reduces the pressure points on the processing surface of the sheet-like thin-walled component and avoids excessive obstruction of the processing surface. The processing surface of the sheet-like thin-walled component can be processed all at once, and the processing parameters and processing quality are relatively easy to control; and there is no need to set up multiple fixtures, which reduces costs.

[0020] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A thin-walled workpiece surface processing fixture, characterized in that: The invention comprises a horizontally arranged substrate (1), a workpiece placement area being arranged on the substrate (1), at least three edge clamping assemblies (2) being arranged on the substrate (1), all the edge clamping assemblies (2) being arranged around the workpiece placement area, a plurality of internal supports (3) being arranged in the workpiece placement area, and a suction cup (4) being arranged in the workpiece placement area; The substrate (1) is also provided with a negative pressure generating device (5), and the negative pressure generating device (5) is connected to the suction cup (4).

2. The thin-walled workpiece surface processing fixture according to claim 1 is characterized in that: The edge clamping assembly (2) comprises an edge supporting seat (21) and an edge pressing assembly (22), and the pressing portion of the edge pressing assembly (22) is located directly above the corresponding edge supporting seat (21).

3. The thin-walled workpiece surface processing fixture according to claim 2 is characterized in that: The edge clamping assembly (22) comprises a clamping cylinder (221), a flipping mechanism (222) and a clamping arm (223); a cylinder mounting through hole is provided on the substrate (1) corresponding to the clamping cylinder (221); the cylinder barrel of the clamping cylinder (221) is fixed to the lower surface of the substrate (1); the cylinder barrel of the clamping cylinder (221) passes upward through the cylinder mounting through hole; the piston rod of the clamping cylinder (221) extends upward; the upper end of the piston rod of the clamping cylinder (221) is connected to the flipping mechanism (222); the flipping mechanism (222) is connected to the clamping arm (223); one end of the clamping arm (223) is located directly above the corresponding edge support seat (21).

4. The thin-walled workpiece surface processing fixture according to claim 1, 2 or 3, characterized in that: An inner support mounting hole is provided on the base plate (1) corresponding to the inner support (3), the inner support (3) is located in the inner support mounting hole, and the inner support (3) is fixed to the lower surface of the base plate (1); The top ends of all the inner supports (3) are located in the same horizontal plane.

5. The thin-walled workpiece surface processing fixture according to claim 4 is characterized in that: The suction cup (4) comprises a cushion block (41), the upper surface of the cushion block (41) is provided with a negative pressure suction hole, and the upper surface of the cushion block (41) is also provided with a sealing ring (42) around the negative pressure suction hole; The level of the top end of the inner support (3) is between the level of the top end of the cushion block (41) and the level of the top end of the sealing ring (42).

6. The thin-walled workpiece surface processing fixture according to claim 5, characterized in that: The negative pressure generating device (5) is arranged on the lower surface of the substrate (1); The negative pressure generating device (5) comprises a seat body (51), a stepped hole is penetrated in the seat body (51), the stepped hole comprises a small diameter hole (5a) and a large diameter hole (5b), the center lines of the small diameter hole (5a) and the large diameter hole (5b) coincide with each other, and a vacuum hole (5c) is also provided on the seat body (51), the vacuum hole (5c) is communicated with the large diameter hole (5b), and the vacuum hole (5c) is close to the small diameter hole (5a); A positive pressure tube (52) is inserted into the large diameter hole (5b), the outer diameter of the positive pressure tube (52) is smaller than the inner diameter of the small diameter hole (5a), the inlet end of the positive pressure tube (52) is located outside the large diameter hole (5b), and the outlet end of the positive pressure tube (52) is close to the small diameter hole (5a); The outer fixed sleeve of the positive pressure tube (52) is provided with two sealing plugs (53), the sealing plugs (53) are located in the large diameter hole (5b), the sealing plugs (53) are tightly pressed against the hole wall of the large diameter hole (5b), one of the sealing plugs (53) is close to the outer end of the large diameter hole (5b), and the other sealing plug (53) is close to the vacuum hole (5c), and the vacuum hole (5c) is located between the inner end of the small diameter hole (5a) and the sealing plug (53) close thereto; The outer end of the positive pressure tube (52) is connected to a positive pressure gas source via a pipeline; The vacuum hole (5c) is connected to the negative pressure suction hole through a pipeline.

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