Multi-point positioning clamp device for precision machining

Abstract

The utility model discloses a multi-point positioning clamp device for precision machining. The multi-point positioning clamp device comprises a clamp bottom table, a clamp frame and a power shell. The utility model relates to the technical field of positioning clamps, and the clamp device ensures that the surface of a special-shaped workpiece to be precisely machined can be seamlessly and tightly attached and fixed by cooperating with a multi-point positioning structure, so that the problems of possible deviation and looseness of the workpiece in the fine machining process are fundamentally solved, and the precision of the workpiece is improved. The situation of defective products or scrapping caused by inaccurate positioning is effectively avoided, then the machining yield of the workpieces with the special-shaped surfaces is remarkably improved, and the stability and consistency of product quality are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to positioning fixture technical field, concretely for a kind of multi-point positioning fixture device for precision machining. BACKGROUND

[0002] Precision machining, relying on high-precision equipment, tool and process, implements extremely meticulous cutting, grinding, stamping etc., aims at micron or even nanometer level size, shape precision and excellent surface quality, far beyond the traditional process category, in mould, micro parts and spacecraft manufacturing etc. field, the technology plays a core role, multi-point positioning fixture, specially designed for workpiece accurate positioning, with multi-point layout firm workpiece, ensure that the position and attitude are constant during the whole processing, its design deeply understands workpiece form, size and processing demand, to optimize processing precision and efficiency, in precision machining field, the fixture is widely used, significantly improves processing precision and stability, guarantees product excellent quality, for the fine processing of special-shaped workpiece, the adaptability of fixture and special-shaped workpiece surface becomes the key to clamping effectiveness, if unable to accurately fit, workpiece is easy to slide during processing, not only damage surface quality, cause defect, in extreme case more can lead to processing overall failure, therefore, ensure that the fixture and special-shaped workpiece surface are highly adapted, it is an indispensable link in precision machining, and it is very important to maintain processing precision and product quality, for the above problems, there may be technical means to solve in prior art, but the present case wants to provide an alternative or replacement technical scheme. SUMMARY

[0003] To achieve the above object, the utility model discloses a kind of multi-point positioning fixture device for precision machining, comprising: fixture base, fixture frame and power housing, the power housing is installed on the fixture frame, the fixture base is connected with the fixture frame, cooperative multi-point positioning structure is installed on the fixture frame, the cooperative multi-point positioning structure includes: clamping hydraulic telescopic rod, link displacement block, link displacement rod, first branch connecting rod, a pair of second branch connecting rod, a plurality of installation through slot, frame transverse strip and a plurality of secondary multi-point positioning components.

[0004] The clamping hydraulic telescopic rod is installed in the power housing, and the clamping hydraulic telescopic rod is connected with the link displacement block, the link displacement block is movably inserted in the fixture frame, and the link displacement block is connected with the link displacement rod, the link displacement rod is connected with the first branch connecting rod through the pivot, the first branch connecting rod is respectively connected with a pair of the second branch connecting rod through the pivot, the frame transverse strip is installed on the fixture frame, and a plurality of installation through slots are respectively formed in the frame transverse strip, a pair of the second branch connecting rod is respectively connected with a plurality of secondary multi-point positioning components through the pivot.

[0005] The secondary multilateration assembly is connected, comprising: a coordination transmission block, a transmission push block, a buffer alignment spring and a push bottom block;

[0006] The coordination transmission block is connected with the second branch connecting rod through a rotating shaft, and the coordination transmission block is movably connected with the transmission push block, the transmission push block is movably inserted into the installation through slot, the transmission push block is connected with the buffer alignment spring, the buffer alignment spring is movably inserted into the installation through slot, and the buffer alignment spring is connected with the push bottom block, the push bottom block is movably inserted into the installation through slot, and the push bottom block is provided with a shape compatible assembly;

[0007] It should be noted that in the above, the workpiece to be positioned and fixed is placed on the clamp base, the clamping hydraulic telescopic rod on the driving power shell is stretched, the connection displacement block is slid on the clamp frame, the connection displacement rod is displaced downward, the first branch connecting rod is pressed downward, the second branch connecting rod below and the four coordination transmission blocks press the plurality of transmission push blocks downward, so that the buffer alignment spring moves downward in the installation through slot, and the corresponding push bottom block is pressed toward the workpiece surface, so that the plurality of shape compatible assemblies are tightly attached to the workpiece surface, and because of the ups and downs of the workpiece, the four coordination transmission blocks are deflected with the second branch connecting rod, and the pair of second branch connecting rods are deflected with the first branch connecting rod, so that the workpiece surface can be firmly fixed by the plurality of push bottom blocks and the shape compatible assemblies thereon, and the installation flange provided on the clamp base can fix the clamp base on the work station, and the shock absorber provided on the clamp base can prevent the workpiece from being affected by vibration during machining, and the anti-skid pad provided on the clamp base can prevent the workpiece from slipping after being placed on the clamp base, facilitating machining.

[0008] Preferably, the shape compatible assembly comprises an assembly support block, a steel sand filling and a plurality of coordination tentacles;

[0009] The assembly support block is connected with the push bottom block, a plurality of coordination tentacles are movably inserted into the assembly support block, and the steel sand filling is installed in the assembly support block;

[0010] It should be noted that in the above, when the push bottom block is pressed against the profiled workpiece surface, the plurality of coordination tentacles will first contact the workpiece surface, so that the coordination tentacles are pressed into the assembly support block, and the steel sand filling gradually fills the vacant position in the assembly support block until it is compacted, at which time the plurality of coordination tentacles will perfectly fit on the surface of the workpiece according to the shape of the workpiece surface.

[0011] Preferably, the clamp base is provided with an installation flange;

[0012] Preferably, the fixture base is provided with a shock absorber;

[0013] Preferably, the fixture base is provided with a non-slip pad;

[0014] Preferably, the power shell is provided with a maintenance access hole.

[0015] Advantages

[0016] The utility model provides a kind of multi-point positioning fixture device for precision machining.It has the following advantages, compared with prior art: the fixture device of the present application, by synergic multi-point positioning structure, ensures that the surface of the special-shaped workpiece to be precision machined can be seamlessly and tightly fixed, which fundamentally solves the problems of deviation and loosening of the workpiece that may occur during precision machining, effectively avoids the defective products or scrapping caused by inaccurate positioning, thereby significantly improves the processing yield of the special-shaped surface workpiece, and ensures the stability and consistency of product quality. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front view of the multi-point positioning fixture device for precision machining.

[0018] Figure 2 It is a front view of the multi-point positioning fixture device for precision machining. Figure 1 It is a partial enlarged view of "A" in the figure.

[0019] Figure 3 It is a partial enlarged view of "B" in the figure. Figure 1 It is a partial enlarged view of "B" in the figure.

[0020] In the figure: 1, fixture base; 2, fixture frame; 3, power shell; 4, clamping hydraulic telescopic rod; 5, link displacement block; 6, link displacement rod; 7, first branch connecting rod; 8, second branch connecting rod; 9, coordination transmission block; 10, transmission push block; 11, installation through slot; 12, buffer alignment spring; 13, push bottom block; 14, component support block; 15, steel sand filling; 16, coordination tentacle strip; 17, frame transverse strip. DETAILED DESCRIPTION

[0021] Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0022] Through the person skilled in the art, all electrical components in the case are connected with their adapted power supply through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should be referred to the working principle below, and the electrical components are connected in the order of working sequence. The detailed connection means is the commonly known technology in the art. The working principle and process are mainly introduced below, and the electrical control is not described.

[0023] Embodiment

[0024] The novel device will be described in detail below in combination with the drawings, such as Figures 1-3The utility model discloses a kind of multi-point positioning fixture devices for precision machining, including: fixture base 1, fixture frame 2 and power housing 3, the power housing 3 is installed on the fixture frame 2, the fixture base 1 is connected with the fixture frame 2, cooperative multi-point positioning structure is installed on the fixture frame 2, and the cooperative multi-point positioning structure includes: clamping hydraulic telescopic rod 4, link displacement block 5, link displacement rod 6, first branch connecting rod 7, a pair of second branch connecting rod 8, several installation through slot 11, frame transverse strip 17 and several secondary multi-point positioning components;The clamping hydraulic telescopic rod 4 is installed in the power housing 3, and the clamping hydraulic telescopic rod 4 is connected with the link displacement block 5, the link displacement block 5 is movably inserted in the fixture frame 2, and the link displacement block 5 is connected with the link displacement rod 6, the link displacement rod 6 is connected with the first branch connecting rod 7 by pivot, the first branch connecting rod 7 is respectively connected with a pair of the second branch connecting rod 8 by pivot, the frame transverse strip 17 is installed on the fixture frame 2, and several installation through slot 11 are respectively formed in the frame transverse strip 17, a pair of the second branch connecting rod 8 is respectively connected with several secondary multi-point positioning components by pivot;The secondary multi-point positioning component is connected, and includes: coordination transmission block 9, transmission push block 10, buffer alignment spring 12 and push bottom block 13;The coordination transmission block 9 is connected with the second branch connecting rod 8 by pivot, and the coordination transmission block 9 is movably connected with the transmission push block 10, the transmission push block 10 is movably inserted in the installation through slot 11, and the transmission push block 10 is connected with the buffer alignment spring 12, the buffer alignment spring 12 is movably inserted in the installation through slot 11, and the buffer alignment spring 12 is connected with the push bottom block 13, the push bottom block 13 is movably inserted in the installation through slot 11, and the push bottom block 13 is installed with form compatible component;The form compatible component includes: component support block 14, filling steel sand 15 and several coordination tentacle strips 16;The component support block 14 is connected with the push bottom block 13, several coordination tentacle strips 16 are movably inserted on the component support block 14 respectively, and the filling steel sand 15 is installed in the component support block 14.

[0025] According to the accompanying Figures 1-3It is concluded that the workpiece to be positioned and fixed is placed on the clamp base 1, the clamping hydraulic telescopic rod 4 on the driving power shell 3 is stretched, the connecting displacement block 5 is slid on the clamp frame 2, the connecting displacement rod 6 is displaced downward, the first branch connecting rod 7 is pressed downward, the second branch connecting rod 8 and the four coordinated transmission blocks 9 will press the plurality of transmission push blocks 10 downward, so that the buffer alignment spring 12 is displaced downward in the installation slot 11, and the corresponding push bottom block 13 is pressed to the workpiece surface, so that the plurality of compatible components are tightly attached to the workpiece surface, and because of the ups and downs of the workpiece, the four coordinated transmission blocks 9 will be deflected by the second branch connecting rod 8, and a pair of second branch connecting rods 8 will be deflected by the first branch connecting rod 7, so that the workpiece surface can be firmly fixed by the plurality of push bottom blocks 13 and the compatible components thereon, and the installation flange provided on the clamp base 1 can fix the clamp base 1 on the work station, the shock absorber provided on the clamp base 1 can prevent the workpiece from being affected by vibration during machining after being fixed, and the anti-skid pad provided on the clamp base 1 can prevent the workpiece from slipping after being placed on the clamp base 1, facilitating machining.

[0026] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A multi-point positioning fixture apparatus for precision machining, comprising: Clamp base, clamp frame and power shell, the power shell is installed on the clamp frame, the clamp base is connected with the clamp frame, and a cooperative multi-point positioning structure is installed on the clamp frame, characterized in that the cooperative multi-point positioning structure comprises a clamping hydraulic telescopic rod, a connecting displacement block, a connecting displacement rod, a first branch connecting rod, a pair of second branch connecting rods, a plurality of installation through grooves, a frame transverse bar and a plurality of secondary multi-point positioning assemblies; The clamping hydraulic telescopic rod is installed in the power shell, and the clamping hydraulic telescopic rod is connected with the connecting displacement block, the connecting displacement block is movably inserted into the clamp frame, and the connecting displacement block is connected with the connecting displacement rod, the connecting displacement rod is connected with the first branch connecting rod through a rotating shaft, the first branch connecting rod is connected with a pair of second branch connecting rods through a rotating shaft, the frame transverse bar is installed on the clamp frame, and a plurality of installation through grooves are formed in the frame transverse bar, and a pair of second branch connecting rods are connected with a plurality of secondary multi-point positioning assemblies through a rotating shaft; The secondary multi-point positioning assembly is connected, comprising a coordinated transmission block, a transmission push block, a buffer alignment spring and a push bottom block; The coordinated transmission block is connected with the second branch connecting rod through a rotating shaft, and the coordinated transmission block is movably connected with the transmission push block, the transmission push block is movably inserted into the installation through groove, and the transmission push block is connected with the buffer alignment spring, the buffer alignment spring is movably inserted into the installation through groove, and the buffer alignment spring is connected with the push bottom block, the push bottom block is movably inserted into the installation through groove, and the push bottom block is provided with a form compatible assembly.

2. The multi-point positioning fixture apparatus for precision machining according to claim 1, wherein, The form compatible assembly comprises an assembly supporting block, a steel sand filling and a plurality of coordinated tentacle strips; The assembly supporting block is connected with the push bottom block, a plurality of coordinated tentacle strips are movably inserted into the assembly supporting block, and the steel sand filling is installed in the assembly supporting block.

3. The multi-point positioning fixture apparatus for precision machining according to claim 2, wherein, The clamp base is provided with an installation flange.

4. The multi-point positioning fixture apparatus for precision machining according to claim 3, wherein, The clamp base is provided with a shock absorber.

5. The multi-point positioning fixture apparatus for precision machining according to claim 4, wherein, The clamp base is provided with an antiskid pad.

6. The multi-point positioning fixture apparatus for precision machining according to claim 5, wherein The power shell is provided with a maintenance access. The clamp base is provided with an installation flange.

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