CN206832541U - A kind of fixing device of machining center vertical crack semi-disc test specimen - Google Patents

Abstract

The utility model discloses a kind of fixing device of machining center vertical crack semi-disc test specimen.It can efficiently solve during machining center vertical crack semi-disc test specimen that disk clamping is inconvenient, unstable, machining accuracy is low, and processes the processing that center vertical crack can not be directly carried out after semi-disc, the problems such as processing efficiency is low.Its technical scheme solved includes positioning base and clamping device；Positioning base is cuboid, there is four equidistant positioning cylinders and center slit on positioning base；Clamping device is made up of four identical components, there are two positioning holes corresponding with positioning cylinder on base above each component, three are used to be fixedly connected with the silk hole with two components above and below group, the part recess one of the part recess two of one diameter 150mm circular groove and a diameter 80mm circular groove, one group of each two identical components clamp disk.The utility model can directly carry out the processing of center vertical crack, improve processing efficiency and precision after semi-disc is processed.

Description

A kind of fixing device of machining center vertical crack semi-disc test specimen

Technical field

The utility model belongs to Rock Mechanics Test equipment technical field, and in particular to a kind of machining center vertical crack semicircle The fixing device of disk test specimen.

Background technology

Rock fracture mechanics are widely used in the field such as civil engineering and mining engineering, drilling well such as to rock, open Digging, explosion, cutting etc. all may relate to the analysis of the problems such as intensity to rock texture, stability and rupture, can use disconnected Split principle, the methods and techniques of mechanics.One important mechanics parameter of rock fracture is exactly fracture toughness, and fracture toughness represents material The ability of material resistance Crack Extension, is one of important evidence of evaluation of material and Structural Strength Design.

The test specimen of many various configurations is used to test the fracture toughness of rock, because test specimen crack is difficult to make and tests The complexity of operation, unified specification is not formed also in the world at present.International Rock mechanics association (ISRM --- International Society for Rock Mechanics) three suggestions for testing rock fracture toughness are given at present Method, 4 kinds of test specimens are contained, are mainly used for the test of rock static state fracture toughness.They are three recommended for 1988 respectively Two kinds of V-notch of point bending pole (SR --- short rod) and the short pole of chevron notch (CB --- chevron bend) Test specimen, chevron shaped grooving Brazilian disc (CCNBD --- the cracked chevron notched that nineteen ninety-five announces Brazilian disc) test specimen.2012, ISRM recommend it is a kind of containing vertical crack three-point bending semi-disc (SCB --- Semi-circular bend) test specimen.And the artificial prefabricated crack of SCB test specimens is straight crack, it is easy to process, structure is relatively simple It is single, promoted once proposition in fracture toughness testing, but during work in-process heart vertical crack semi-disc (SCB) test specimen Disk clamping is inconvenient, unstable, causes machining accuracy low, and can not directly carry out center vertical crack after processing semi-disc Processing, processing efficiency are low.Therefore, a kind of accurate positioning is needed badly, clamp structure is simple and convenient, stably, and machining accuracy is high, processes The fixing device of centre burst processing can be directly carried out after semi-disc.

The content of the invention

For the above situation, to solve the defect of prior art, the utility model purpose be just to provide it is a kind of simple in construction, Clamping is convenient, stable, and machining accuracy is high, and centre burst processing can directly be carried out later by processing semi-disc, high in machining efficiency Fixing device.

To realize above-mentioned technical purpose, technical scheme includes used by the utility model：Positioning base and clamping device； Positioning base is cuboid；There are length and width seam, the downward stroke of increase cutting blade, so as to once cut through circle in positioning base center Disk；There are the distance between four equidistant positioning cylinders, each two adjacent column equal on positioning base and distance center is grown The distance of seam is equal, namely vertex position and the axis of center slit and positive four side of four cylinder distributing positions for square The center line of shape overlaps；The cylinder line on center slit both sides and the axis of center slit are vertical, and positioning cylinder is to be screwed in positioning bottom It is dismountable on seat, positioning cylinder upper end is the cross recess for loading and unloading positioning cylinder, is in order to facilitate clamping device Dismounting；Clamping device is made up of four identical components, and each component is in cuboid tabular, has two and bottom above each component The corresponding positioning hole of positioning cylinder on seat, three are used to being fixedly connected the silk holes with group two components up and down, in three silk holes One silk hole position is between two positioning holes and two positioning holes are in component one end, and another two silk hole position is in the other end of component Close to the position of groove port；The part of the part recess two of one diameter 150mm circular groove and a diameter 80mm circular groove is recessed Disk is clamped and is used to be fixedly connected with two above and below group by tightening three by groove one, one group of each two identical components by groove Adjusting screw on the silk hole of individual component holds disk tightly, so as to realize the convenience of clamping and stably.When one group of component for accompanying disk Positioning cylinder is embedded in by positioning hole and when level is sitting on positioning base, component on positioning base center slit that End close to center slit and without departing from center slit and with the sides aligned parallel of center slit；Therefore positioning hole and positioning cylinder are passed through Positioning function, avoid component on positioning base that end of center slit and center slit at an angle, Yi Ji Cutting sheet switches to component in cutting process, causes cutting sheet and component while is destroyed.Diameter 150mm circular groove two and straight Footpath 80mm circular groove one has the common center of circle and the center of circle on the perpendicular bisector of two positioning hole lines and diameter 80mm The depth of groove one is more than diameter 150mm groove two, and two grooves are located at component close to that end of center slit.Cut when by disk After being cut into two semi-discs, without clamping device is taken apart, now every group component holds a semi-disc, will then hold Two groups of components of semi-disc are integrally removed, and one of which is embedded in two positioning cylinders of center slit one end by positioning hole On, make the axis of the semicircle card and center slit cut out vertical, due to the line of two positioning cylinders of center slit one end Vertical with center slit and to slit distance is equal, so, now the center of circle of semi-disc can fall in the slit of center surely, and It ensure that the axis of the semi-disc plane cut out and center slit is vertical, namely ensure that hanging down for semi-disc plane and cutting sheet Directly, therefore it ensure that cutting sheet disposably penetrates downwards, the center for being perpendicular to semi-disc plane cut out on semi-disc is straight Crackle rather than shear crack, another group of component that hold semi-disc carry out identical also by positioning hole and corresponding positioning cylinder Installation, so as to obtain two semi-disc i.e. SCB for carrying center vertical crack, it is achieved thereby that be accurately positioned, improve plus Work precision and efficiency.

Income effect of the present utility model is：Simple in construction, clamping is convenient, stable, and machining accuracy is high, processes semi-disc Centre burst processing can be directly carried out later, it is high in machining efficiency.

Brief description of the drawings

Fig. 1 is structural representation of the utility model equipped with a component.

Fig. 2 is the front view of the utility model positioning base.

Fig. 3 is the left view of the utility model positioning base.

Fig. 4 is the top view of the utility model positioning base.

Fig. 5 is the top view of the utility model positioning cylinder.

Fig. 6 is the top view of a component of the utility model clamping device.

Fig. 7 is the front view of a component of the utility model clamping device.

Fig. 8 is adjusting screw of the present utility model.

Fig. 9 is the assembling schematic diagram of the utility model positioning base and cutting off machine.

Embodiment

As shown in Fig. 1~Fig. 9, a kind of fixing device of machining center vertical crack semi-disc test specimen, including the He of positioner 1 Clamping device；There are a center slit, the downward stroke of increase cutting blade, so as to once cut through circle in the center of positioning base 1 Disk；There are the distance between four positioning cylinders 3, each two adjacent column equal on the positioning base 1 and distance center is grown The distance of seam 2 is equal, and the cylinder line on the both sides of center slit 2 and the axis of center slit 2 are vertical, and positioning cylinder is to be screwed in positioning It is dismountable, positioning cylinder upper end is the cross recess 3-1 for handling on base.The clamping device have four it is identical Component 4 form, each component 4 has two positioning holes 5 corresponding with positioning cylinder on base 3 above, has three for fixing Silk hole 6, have a part recess 28 of diameter 150mm circular groove and the part recess 1 of a diameter 80mm circular groove, every two Disk is clamped in corresponding groove by individual 4 one groups of component, and adjusting screw 12 makes one group of two components 4 tightly clamp circle by silk hole 6 Disk.

A kind of fixing device of machining center vertical crack semi-disc test specimen, in processing diameter 150mm center vertical crack half Step is as follows during disk test specimen, and positioning base is placed on the electromagnet 10 of cutting off machine, makes the center slit 2 of positioning base 1 The positioning cylinder line on both sides is parallel with plane where cutting sheet, opens electromagnet 10, positioning base is fixed on electromagnet； Make the groove of two components 4 of clamping device face-up, pass through every side of two positioning holes 5 on component 4 and center slit 2 Two positioning cylinders 3 are inlayed, and at center, a component 4 is respectively installed in every side of slit 2, and diameter 150mm disk is placed on into groove In 28；Make the groove 28 of the another two component 4 of clamping device face-down, pass through two positioning holes 5 on component 4 and center Two positioning cylinders 3 of every side of slit 2 are inlayed, and at center, a component 4 is respectively installed in every side of slit 2 again, so as to disk It is stuck in clamping device.By adjusting screw 12 in the silk hole 6 on the component 4, and tighten, make clamping device tightly clamp circle Disk；The operation handle 9 of cutting off machine is adjusted, makes the alignment disk face center of circle of cutting sheet 11, cutting machine is opened, passes through operation lathe Up and down, disk is cut into two semi-discs by left-handed operation handle, turns off cutting machine；The clamping device for accompanying semi-disc is removed, Make the cut surface of semi-disc vertical with the axis of center slit 2, and pass through two positioning holes 5 on clamping device and center slit Two cylinders of 2 one are inlayed together；The operation handle 9 of cutting off machine is adjusted, makes the center of circle of cutting sheet alignment semi-disc；Beat Cutting machine is opened, above and below operation lathe, left-handed operation handle cuts out the centre burst of predetermined length, so as to once obtain Center vertical crack semi-disc test specimen, another semi-disc cut process vertical crack by same operating method, thus can be with Two center vertical crack semi-disc test specimens are directly obtained, reduces the time of later stage center vertical crack processing, improves precision.

Process diameter 80mm center vertical crack semi-disc test specimen step and processing diameter 150mm center vertical crack semicircle Disk test specimen step is identical, and simply diameter 80mm disk is put into the groove 1 of component 4.

This utility structure is simple, accurate positioning, and clamping is convenient, stably, and machining accuracy is high, and processing after semi-disc can be with Centre burst processing is directly carried out, it is high in machining efficiency.

Claims (1)

1. A kind of 1. fixing device of machining center vertical crack semi-disc test specimen, it is characterised in that：Including positioning base (1) and clamping Device；There is a center slit (2) at positioning base (1) center；Positioning base (1) is cuboid, and positioning base has four on (1) The distance between individual positioning cylinder (3), each two adjacent column are equal and distance of distance center slit (2) is equal, namely Four cylinder (3) distributing positions are the vertex position and the axis of center slit (2) and the center line weight of square of square Close；The cylinder line on center slit (2) both sides and the axis of center slit (2) are vertical, and positioning cylinder (3) is to be screwed in positioning base (1) it is dismountable, positioning cylinder (3) upper end is for loading and unloading the cross recess of positioning cylinder (3-1) on；The clamping dress Four identical component (4) compositions are equipped with, each component (4) is in cuboid tabular, and each component (4) has two and base above The corresponding positioning hole (5) of upper positioning cylinder (3), there is three silk holes (6), and a silk hole (6) in three silk holes (6) is located at two Between positioning hole (5) and two positioning holes (5) are in component (4) one end, and another two silk hole (6) is located at the other end of component (4) Close to the position of groove port；Have diameter 150mm circular groove part recess two (8) and a diameter 80mm circular groove part it is recessed Groove one (7), (4) one groups of each two component by groove by disk clamp and by tighten three be used for fixation silk hole (6) Adjusting screw (12) disk is held tightly；Component (4) is embedded in positioning cylinder (3) by positioning hole (5) and level is sitting in positioning base (1) when on, component (4) is close to that end of center slit (2) on positioning base (1) close to center slit (2) and without departing from center Slit (2) and with the sides aligned parallel of center slit (2)；The part recess two (8) of diameter 150mm circular grooves and diameter 80mm circular grooves Part recess one (7) have the common center of circle and the center of circle on the perpendicular bisector of two positioning hole (5) lines and diameter 80mm it is recessed Groove one (7) depth is more than diameter 150mm groove two (8), and groove two (8) and groove one (7) are located at component (4) and grown close to center Stitch (2) that end.