CN206084501U - A CNC machining positioning fixture - Google Patents

Abstract

The utility model discloses a CNC processing positioning jig, which comprises a rectangular bottom plate, wherein two positioning units are arranged on the upper surface of the rectangular bottom plate, the positioning units comprise a vacuum suction plate for placing a workpiece, the vacuum suction plate is provided with a plurality of vacuum suction holes for sucking the workpiece, the vacuum suction plate is rectangular and is provided with four side edges at the front, the back, the left and the right, two adjacent side edge peripheries are provided with two groups of positioning pins fixed on the bottom plate, the other two side edge peripheries are provided with two groups of self-locking cylinders fixedly arranged on the bottom plate, the output directions of the two groups of self-locking cylinders are vertical and drive two push blocks to tightly press the workpiece on the two groups of positioning pins when moving towards the vacuum suction plate, the utility model has the advantages that the utility model is used for positioning plate materials in the CNC processing process, the device has smaller volume and accurate positioning, if unstable air source appears after clamping the workpiece, because the cylinder has a self-locking function, the workpiece can be well clamped.

Description

A CNC machining positioning fixture

technical field

The utility model belongs to the field of CNC machining fixtures, in particular to a CNC machining positioning fixture.

Background technique

In the process of CNC processing the flying surface (that is, the horizontal surface of the plate) and the positioning hole of the plate material, the plate material needs to be fixed. The current positioning fixture has a large volume and is generally fixed by a vise or a linear cylinder. This kind of fixture needs to occupy a large installation space of the CNC workbench. The vise is used to lock the workpiece manually, which is inefficient. During long-term processing, the linear cylinder is easy to reset, resulting in poor positioning of the workpiece and inaccurate processing.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model proposes a CNC machining positioning jig with small volume, precise positioning and self-locking function.

The utility model solves the above-mentioned technical problems through the following technical solutions.

A positioning fixture for CNC machining, comprising a rectangular bottom plate, two positioning units are installed on the upper surface of the rectangular bottom plate, the positioning unit includes a vacuum suction plate for placing workpieces, and the vacuum suction plate is provided with multiple For the vacuum suction hole for absorbing workpieces, the vacuum suction plate is rectangular in shape and has four sides, front, back, left, and right. Two sets of positioning pins fixed on the bottom plate are arranged on the periphery of the adjacent two sides, and two sets of positioning pins are fixed on the periphery of the other two sides. There are two sets of self-locking cylinders fixedly installed on the bottom plate. The output direction of the two sets of self-locking cylinders is vertical and drives the two push blocks to move to the vacuum suction plate, so that the workpiece can be pressed against the two sets of positioning pins.

More specifically, any one of the two sets of positioning pins includes two positioning pins.

More specifically, the surfaces of the two vacuum suction plates are provided with a network of vacuum negative pressure grooves, and the vacuum negative pressure grooves communicate with the vacuum suction holes.

More specifically, the two vacuum suction plates of the two positioning units are arranged in parallel, and the two positioning units contain four sets of self-locking cylinders and are respectively located on the left, right and rear sides of the bottom plate.

More specifically, the self-locking cylinder includes a cylinder body, and a piston rod that can move left and right is arranged in the cylinder body. The left and right ends of the piston rod are covers, and the middle part of the piston rod is located There is a path surface between the cylinders, the path surface includes three sections, the left and right sections are planes, and the middle section is a slope. The front side of the cylinder is provided with an opening, and an output shaft that can move forward and backward is provided in the opening. One end of the output shaft located inside the cylinder elastically abuts against the path surface, and one end of the output shaft located outside the cylinder is connected to the push block.

The beneficial effect of the utility model is that the utility model is used for the positioning of the plate material in the CNC machining process. The device is small in size and accurate in positioning. The lock function can still clamp the workpiece very well.

Description of drawings

Fig. 1 is one of structural representations of the utility model.

Fig. 2 is the second structural diagram of the utility model.

Fig. 3 is a schematic diagram of the internal structure of the self-locking cylinder of the present invention.

detailed description

The preferred embodiments of the utility model are given below in conjunction with the accompanying drawings to describe the technical solution of the utility model in detail.

As shown in Fig. 1 to Fig. 2, the present embodiment includes a rectangular bottom plate 1, and two positioning units are installed on the upper surface of the rectangular bottom plate 1, and the positioning unit includes a vacuum suction plate 2 for placing a workpiece 10, and the vacuum suction plate 2 The plate 2 is provided with a plurality of vacuum suction holes for absorbing workpieces. The vacuum suction plate 2 is rectangular and has four sides, front, rear, left, and right, and two adjacent sides are provided with two sets of positioning holes fixed on the bottom plate. Pin 3, two sets of self-locking cylinders 4 fixedly installed on the bottom plate 1 are arranged on the periphery of the other two sides. Press the workpiece 10 against the two sets of positioning pins 3, any one of the two sets of positioning pins 3 includes two positioning pins, and the surface of the two vacuum suction plates 2 is provided with a network of vacuum negative pressure grooves. The groove is connected to the vacuum suction hole, and the vacuum suction hole is connected to the vacuum generating device. This network design makes the force on the workpiece more balanced. The two vacuum suction plates 2 of the two positioning units are arranged in parallel, and the two positioning units contain four groups. The self-locking cylinder 4 is respectively located on the left and right sides and the rear side of the base plate,

As shown in Figure 3, the self-locking cylinder 4 includes a cylinder body 41, a piston rod movable left and right is provided in the cylinder body 41, the left and right ends of the piston rod are covers 42, the middle part of the piston rod, A path surface 43 is provided between the two ends of the cover body 42. The path surface 43 includes three sections, the left and right sections are planes, and the middle section is a slope. The front side of the cylinder body 41 is provided with an opening. An output shaft 44 that can move back and forth, one end of the output shaft 44 located inside the cylinder body 41 elastically abuts against the path surface 43 (acted by a spring 45), and one end of the output shaft 44 located outside the cylinder body 41 is connected to the The working principle of the push block 40 is that when the piston rod is pushed by the gas to move left and right in the cylinder body 41, its path surface 43 drives the output shaft 44 to move back and forth. When the end of the output shaft touches the left and right planes, at this time When the air cylinder is cut off, the output shaft 44 will not move, so the self-locking function is realized.

The operation steps are as follows: 1. Put the workpiece 10 on the vacuum suction plate 1; 2. Turn on the vacuum generating device to suck the product tightly; 3. The self-locking cylinder 4 drives the push block 40 to push the product to the positioning pins on the other two sides. fixed.

Working principle: The deformation of the plate material is different, and the flatness is quite different. The workpiece is made to stick to the bottom under the action of the vacuum suction plate, and the two sides are positioned with two sets of positioning pins. The push block pushes the workpiece so that the workpiece touches the two sets of positioning pins, and the self-locking cylinder automatically locks and will not retreat during the processing.

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present utility model, but these changes and modifications all fall within the protection scope of the present utility model.

Claims (2)

1. a kind of CNC locating and machinings tool, it is characterised in that including rectangular base plate, the upper surface of the rectangular base plate is provided with Two positioning units, the positioning unit includes the vacuum plate sucking for placing workpiece, and the vacuum plate sucking is provided with multiple being used for The vacuum sucking holes of absorption workpiece, the vacuum plate sucking is rectangular, with four sides all around, wherein outside two neighboring side Enclose and be provided with two groups of alignment pins being fixed on base plate, two other side periphery is provided with two groups of self-lockings being fixedly mounted on base plate Cylinder, the outbound course of two groups of self-locking cylinders vertically and drives two pushing blocks to push against workpiece when moving to vacuum plate sucking to arrive On two groups of alignment pins, the self-locking cylinder includes cylinder body, and being provided with the cylinder body can be with the piston rod of left and right activity, the piston The left and right two ends of bar are lid, the middle part of the piston rod, are provided between the lid of two ends path surface, and the path surface includes Three sections, two sections of left and right is plane, and interlude is inclined-plane, and opening is provided with front side of the cylinder body, and being provided with opening can fore-aft travel Output shaft, the output shaft is located at one end elasticity of cylinder interior and abuts the path surface, and the output shaft is located at outside cylinder body The one end in portion connects the pushing block.

2. CNC locating and machinings tool according to claim 1, it is characterised in that arbitrary group in two groups of alignment pins is wrapped Include two alignment pins.

3. CNC locating and machinings tool according to claim 1, it is characterised in that two vacuum plate sucking surfaces are provided with network The negative pressure of vacuum groove of shape, negative pressure of vacuum groove is connected with vacuum sucking holes.

4. CNC locating and machinings tool according to claim 1, it is characterised in that two vacuum of two positioning units are inhaled Plate be arranged in parallel, and two positioning units are comprising four groups of self-locking cylinders and respectively positioned at the left and right sides of base plate and rear side.