CN104070252A - Clamp for cutting hollow workpiece into halves - Google Patents

Abstract

The invention discloses a fixture for cutting a hollow workpiece in half, and provides a fixture with simple structure, convenient processing and adjustability. The bottom plate is provided with a machine tool fixing hole, a workpiece placement groove and a cutting groove. The workpiece inner hole positioning plate is placed in the workpiece placement groove and is detachably connected with the bottom plate. The outer circumference of the workpiece inner hole positioning plate matches the inner hole of the workpiece; each The connecting rod is used to connect a cutting platen. One end of each connecting rod is connected to the corresponding cutting platen, and the other end is connected to the bottom plate. The two cutting platens respectively press the two parts of the cut workpiece. correspond. The fixture of the invention fixes the workpiece through the combination of the positioning plate in the workpiece inner hole, the workpiece placement groove, the connecting rod and the cutting pressure plate, and has the advantages of simple structure, convenient processing and high positioning accuracy. Moreover, it has adjustability, and can adapt to the processing needs of different workpieces by changing the size of the positioning plate in the inner hole of the workpiece, thus saving the processing cost.

Description

A Fixture for Cutting Hollow Workpiece in Half

technical field

The invention relates to the technical field of fixtures, in particular to a fixture for cutting a hollow workpiece in half.

Background technique

The shell of the cylindrical thin-shell workpiece is formed by casting, and the inner hole surface of the workpiece positioning has been processed on the lathe. Now it is necessary to cut the shell workpiece in half. In this group of similar workpieces, the diameters of the outer shell and the inner hole of the workpiece are different. Shell thickness is the same. Usually this kind of thin-shell workpiece is processed, and the shells with different inner hole diameters need to process a positioning fixture with a corresponding diameter on the CNC milling machine, and the processed fixture has no adjustability. The thin-shell workpieces with different diameters correspond to one fixture, which consumes man-hours and wastes fixture materials. The above-mentioned problems also exist in the processing of thin-shell workpieces of other shapes.

Contents of the invention

The object of the present invention is to aim at the technical defects existing in the prior art, and provide a jig for cutting a hollow workpiece in half with simple structure, convenient processing and adjustability.

The technical scheme adopted for realizing the purpose of the present invention is:

A fixture for cutting a hollow workpiece in half, comprising a base plate, a workpiece inner hole positioning plate, two connecting rods and two cutting pressure plates, the base plate is provided with a machine tool fixing hole, a workpiece placement groove and a cutting groove. The workpiece inner hole positioning plate is placed in the workpiece placement groove and is detachably connected with the bottom plate, the outer periphery of the workpiece inner hole positioning plate matches the inner hole of the workpiece; one end of each connecting rod is connected to the The corresponding cutting platen is connected, and the other end is connected with the base plate, and the two cutting platens respectively press the two parts of the cut workpiece; the cutting groove corresponds to the slit of the workpiece, and the cutting groove The length is greater than the diameter of the largest workpiece.

The bottom plate is provided with at least two peripheral positioning grooves of the workpiece, each peripheral positioning groove of the workpiece is respectively equipped with a peripheral positioning key, and the peripheral positioning key is detachably connected with the bottom plate.

One end of the cutting groove runs through one side of the bottom, and a keyway is provided on the side of the bottom plate corresponding to the side where the cutting groove runs through, and an end positioning key is installed in the keyway.

The base plate and the workpiece inner hole positioning plate are provided with corresponding positioning holes, and positioning pins for positioning the base plate and the workpiece inner hole positioning plate are inserted into the positioning holes.

The base plate is provided with a plurality of connection holes, and the workpiece inner hole positioning plate is detachably connected to the base plate through screws inserted into the connection holes.

The plurality of connection holes respectively correspond to the two parts of the cut workpiece, and are arranged outwards from the center of the bottom plate.

There are multiple positioning holes, respectively corresponding to the two parts of the workpiece after cutting, and arranged symmetrically.

Compared with prior art, the beneficial effect of the present invention is:

1. The fixture of the present invention fixes the workpiece through the combination of the positioning plate in the workpiece inner hole, the workpiece placement groove, the connecting rod and the cutting plate, and has a simple structure, convenient processing and high positioning accuracy. Moreover, it has adjustability, and can adapt to the processing needs of different workpieces by changing the size of the positioning plate in the inner hole of the workpiece, thus saving the processing cost.

2. In the fixture of the present invention, at least two peripheral positioning grooves of the workpiece are arranged on the bottom plate, and peripheral positioning keys are installed in each peripheral positioning groove of the workpiece, and the peripheral positioning keys are used to position the peripheral of the workpiece, thereby ensuring the stability of processing. Improved machining accuracy. At the same time, when the size of the workpiece changes, the position of the peripheral positioning key can be adjusted to meet the processing needs of workpieces of different sizes, and the adaptability is strong.

3. In the jig of the present invention, a keyway is provided on the side where the bottom plate and the cutting groove pass through, and an end positioning key is installed in the keyway, which can effectively reduce the slight dislocation deformation after cutting on both sides of the bottom plate, and the processing accuracy is high.

Description of drawings

Fig. 1 shows that the present invention is used for the schematic diagram of the clamp that cuts hollow workpiece in half;

Fig. 2 shows that the present invention is used for the schematic diagram of the bottom plate of the clamp for cutting hollow workpiece in half;

Fig. 3 is a view showing the use state of the jig for cutting a hollow workpiece in half according to the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

The present invention is used for the schematic diagram of the jig of cutting hollow workpiece in half as shown in Fig. 1-Fig. A machine tool fixing hole 11, a workpiece placement groove 10 and a cutting groove 12 are arranged on the top, and the workpiece inner hole positioning plate 4 is placed in the workpiece placement groove 10 and is detachably connected with the bottom plate 1. In this embodiment, the The base plate 1 is provided with a plurality of connecting holes 15, and the workpiece inner hole positioning plate 4 is detachably connected with the base plate 1 through screws 6 inserted into the connecting holes 15. The outer periphery of the workpiece inner hole positioning plate 4 is matched with the inner hole of the workpiece. One end of each connecting rod 8 is connected to the corresponding cutting platen 9 , and the other end is connected to the base plate 1 , and the two cutting platens 9 respectively press the two parts of the cut workpiece. The cutting groove 12 corresponds to the kerf of the workpiece, and the length of the cutting groove 12 is greater than the diameter of the largest workpiece.

When the shape of the workpiece is cylindrical, in order to locate the outer periphery, the base plate 1 is provided with at least two workpiece outer peripheral positioning grooves 13, and each outer peripheral positioning groove 13 of the workpiece is respectively equipped with outer peripheral positioning keys 3, so The peripheral positioning key 3 is detachably connected to the bottom plate 1 by screws. The outer circumference of the workpiece is positioned after a plurality of workpiece outer circumference positioning keys 3 are combined. When the shape of the workpiece is a rectangle or a rhombus, etc., the outer periphery of the workpiece can be positioned through the workpiece placement groove. It can also be positioned through the peripheral positioning groove of the workpiece.

In order to effectively reduce the slight dislocation deformation after the two sides of the bottom plate are cut, one end of the cutting groove 12 runs through one side of the bottom 1, and a keyway 14 is provided on the side of the bottom plate 1 corresponding to the side where the cutting groove 12 penetrates. , the end positioning key 5 is installed in the keyway 14 .

For accurate positioning, the base plate 1 and the workpiece inner hole positioning plate 4 are respectively provided with corresponding positioning holes 16, which are inserted into the positioning holes 16 for the base plate 1 and the workpiece inner hole positioning plate 4. Locating pin 7 for positioning.

In this embodiment, the plurality of connection holes 15 respectively correspond to the two parts of the cut workpiece, and are arranged outwards from the center of the bottom plate 1 .

There are multiple positioning holes 16, respectively corresponding to the two parts of the workpiece after cutting, and arranged symmetrically.

In this embodiment, the connecting rod 8 can be a long screw, one end of the long screw passes through the bottom plate 1 and the cutting platen 9, and the cutting platen is pressed against the upper surface of the workpiece by tightening the nut.

When in use, the bottom plate 1 is fixed on the horizontal plate of the wire cutting machine tool through the screws passing through the machine tool fixing hole 11, so as to ensure that the side of the bottom plate is parallel to a certain axis of the machine tool. Put the inner hole positioning plate 4 into the workpiece placement groove 10, align the positioning hole on the inner hole positioning plate with the positioning hole 16 in the workpiece placement groove 10, and put it into the positioning pin 7 for positioning, and then use the screw 6 to fix the The inner hole positioning plate 4 is fixed to the bottom plate 1. Align the inner hole of the thin-shell workpiece 2 with the workpiece inner hole positioning plate 4 and put it into the workpiece placement groove 10 of the bottom plate 1, and position the workpiece inner hole through the workpiece inner hole positioning plate 4 . Put the peripheral positioning keys 3 into the workpiece peripheral positioning grooves 13 on the left and right sides of the bottom plate respectively, so as to perform circumferential positioning on the thin-shell workpiece. Then tighten the screw that the workpiece peripheral positioning groove 13 is connected with the base plate 1 to prevent the key from sliding along the groove. By tightening the connecting rod 8, the cutting platen 9 is pressed against the thin shell workpiece. After the wire cutting wire penetrates into the cutting groove 12, the end positioning key 5 is embedded in the end key groove 14 for cutting.

The size of the workpiece inner hole positioning plate 4 can be changed according to the size of the processed thin shell workpiece inner hole, and the left and right positions of the peripheral positioning keys 3 on both sides of the workpiece placement groove 10 can be adjusted according to the size of the thin shell workpiece outer circumference. There is an end keyway 14 on the front side of the base plate 1 , and by embedding the end positioning key 5 , the slight dislocation deformation after cutting both sides of the base plate 1 can be effectively reduced. The fixture of the invention has strong adaptability, convenient adjustment and operation, and high positioning accuracy.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvements and Retouching should also be regarded as the protection scope of the present invention.

Claims (7)

1. A fixture for cutting a hollow workpiece in half, characterized in that it comprises a base plate, a positioning plate for the inner hole of the workpiece, two connecting rods and two cutting pressure plates, the base plate is provided with a machine tool fixing hole, and the workpiece is placed groove and cutting groove, the workpiece inner hole positioning plate is placed in the workpiece placement groove and is detachably connected with the bottom plate, and the outer circumference of the workpiece inner hole positioning plate matches the inner hole of the workpiece; each One end of the connecting rod is connected to the corresponding cutting platen, and the other end is connected to the bottom plate, and the two cutting platens respectively press the two parts of the cut workpiece; the cutting groove corresponds to the slit of the workpiece , the length of the cutting groove is greater than the diameter of the largest workpiece. 2. The jig for cutting a hollow workpiece in half according to claim 1, wherein at least two workpiece peripheral positioning grooves are arranged on the base plate, and each workpiece peripheral positioning groove is respectively equipped with The peripheral positioning key is detachably connected to the bottom plate. 3. The jig for cutting a hollow workpiece in half according to claim 1 or 2, wherein one end of the cutting groove runs through one side of the bottom, and the side corresponding to the side through which the cutting groove penetrates A keyway is provided on the side of the bottom plate, and an end positioning key is installed in the keyway. 4. The jig for cutting a hollow workpiece in half according to claim 3, characterized in that, the base plate and the workpiece inner hole positioning plate are provided with corresponding positioning holes, and the positioning holes are inserted into The positioning pin is used for positioning the bottom plate and the positioning plate in the inner hole of the workpiece. 5. The fixture for cutting a hollow workpiece in half according to claim 3, wherein a plurality of connection holes are arranged on the base plate, and the workpiece inner hole positioning plate is inserted into the connection hole The screws are detachably connected to the bottom plate. 6. The jig for cutting a hollow workpiece in half according to claim 5, wherein a plurality of connecting holes correspond to two parts of the cut workpiece respectively, and extend outward from the center of the bottom plate arrangement. 7 . The jig for cutting a hollow workpiece in half according to claim 4 , wherein there are a plurality of positioning holes, which respectively correspond to the two parts of the cut workpiece and are arranged symmetrically.