Preparation device of fatigue crack propagation sample

Abstract

The utility model discloses a preparation device of a fatigue crack propagation sample, which relates to the technical field of drilling processing of metal samples and comprises a three-shaft rack, a loading platform and a loading frame are arranged on the three-shaft rack, a drilling frame is arranged at the bottom of the loading frame, symmetrical drilling shafts are arranged on the drilling frame, a drilling tool bit is mounted at the bottom end of each drilling shaft, and a drilling tool bit is mounted at the bottom end of each drilling shaft. The first driving motor drives the driving wheel to rotate, the driving wheel can drive the two driven wheels to synchronously rotate through the belt, then the three-shaft rack drives the drilling frame to vertically descend, the drilling tool bit at the bottom end of the drilling shaft can conduct double-hole synchronous drilling and tapping on samples, and the drilling tool bit can be used for drilling and tapping the samples with different hole pitches. The double-thread screw is driven by the second driving motor to rotate, so that the two adjusting sliding seats move towards each other or away from each other, the drilling tool bits on the drilling shafts are driven to automatically adjust the distance, by means of the structure, operation is easy and convenient, synchronous double-hole drilling and tapping are achieved, the sample preparation efficiency is improved, and the device is suitable for batch sample preparation.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal test piece drilling processing technical field, more specifically, the utility model relates to a kind of fatigue crack propagation test piece preparation device. BACKGROUND

[0002] Fatigue crack propagation test is to study the tearing characteristics of metal material under this stress mode, including tearing strength, crack propagation law, etc., by applying specific expansion force to metal test piece with double holes, to evaluate the ability of material to resist tearing damage, mainly used for analyzing the mechanical properties of material under special working conditions (such as bearing local concentrated force, stress concentration, etc.).

[0003] During the preparation of the test piece, the test piece needs to be fixed first, and then the drilling device is operated to drill two round holes in the test piece. Since the requirements for hole spacing are different for different test purposes, and the test usually needs to be carried out multiple times, more test pieces are required. The above-mentioned method has low efficiency and is inconvenient to operate. UTILITY MODEL CONTENTS

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a kind of fatigue crack propagation test piece preparation device to solve the problems of low efficiency and inconvenient operation of the existing test piece preparation.

[0005] To solve the above technical problems, the utility model provides the following technical scheme: a kind of fatigue crack propagation test piece preparation device, including three-axis rack, loading platform and loading frame are arranged on the three-axis rack, the bottom of the loading frame is provided with drilling jig, symmetric drilling shafts are arranged on the drilling jig, drilling tool bit is installed at the bottom end of each drilling shaft, driven wheel is fixedly installed at the top end of each drilling shaft, driving wheel is further provided above the drilling jig, belt is sleeved on two drilling shafts and driving wheel, one end of the driving wheel rotating shaft is fixedly connected with driving motor one, distance adjusting assembly that can adjust the distance between two drilling shafts is arranged on the drilling jig, position adjusting assembly that can adjust the position of driving wheel to keep the belt taut is further arranged on the drilling jig.

[0006] Preferably, the driving wheel is located in the middle of the two driven wheels, and the diameter of the driving wheel is greater than the diameter of the driven wheels.

[0007] Preferably, the distance adjusting assembly includes a sliding groove opened on the drilling jig, a double-thread screw is rotatably connected in the sliding groove, symmetric adjusting sliding seats are threadedly installed on the double-thread screw, the adjusting sliding seats can slide linearly along the sliding groove, and the drilling shafts are rotatably connected to the adjusting sliding seats, driving motor two is fixedly installed on one side of the drilling jig, the output end of the driving motor two is fixedly connected with one end of the double-thread screw, and the two drilling shafts are rotatably connected to the two adjusting sliding seats respectively.

[0008] Preferably, the position adjusting assembly comprises a fixing seat fixedly installed on the drilling frame, a hydraulic rod is installed on the fixing seat, a mounting seat is fixedly connected to the extension end of the hydraulic rod, and the driving motor is fixedly installed on the mounting seat.

[0009] Preferably, the anti-dust assembly capable of shielding flying dust is arranged on each adjusting sliding seat, the anti-dust assembly comprises a baffle one fixedly installed on the bottom surface of the adjusting sliding seat, a baffle two is movably inserted into the baffle one, a plurality of leakage holes are uniformly formed in the baffle two, a telescopic rod is arranged on the outer side of the baffle one and the baffle two, a spring is sleeved on the outer surface of the telescopic rod, and the upper end and the lower end of the telescopic rod are fixedly connected with the top of the baffle one and the bottom of the baffle two respectively, and the upper end and the lower end of the spring are fixedly connected with the top of the baffle one and the bottom of the baffle two respectively.

[0010] Preferably, the baffle one and the baffle two are circular ring structures, and the drilling tool bit is located on the axial line of the baffle one and the baffle two.

[0011] Preferably, the distance adjusting assembly is provided with a cooling assembly, the cooling assembly comprises two conveying pipes one fixedly installed on the adjusting sliding seat, the two conveying pipes one are respectively arranged to penetrate through the two adjusting sliding seats, a nozzle is fixedly and communicatively connected to the bottom end of the two conveying pipes one, the nozzle is located at the middle part of the baffle one and the baffle two, a water conveying pipe two is fixedly and communicatively connected between the two conveying pipes one, and the water inlet of the water conveying pipe two is connected with a cooling liquid supply system.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] The utility model discloses a driving motor one drives the rotation of the driving wheel, the driving wheel utilizes the belt and can drive the synchronous rotation of two driven wheels, then through the vertical descent of the drilling frame driven by the three -axis frame, the drilling tool bit at the bottom end of the drill shaft can carry out the synchronous drilling of double holes to the sample, for the sample of different hole pitch requirement, through the rotation of the double -threaded screw driven by the driving motor two, the two adjusting sliding seats move to each other or move away, thereby driving the automatic pitch adjustment of the drilling tool bit on the drill shaft, utilizing above -mentioned structure, simple and convenient operation, and synchronous double -hole drilling make the sample preparation efficiency improve, be applicable to batch sample preparation.

[0014] During the drilling process of the drilling tool bit, the baffle two is pressed on the sample surface and gradually shrinks into the baffle one, so that the baffle one and the baffle two can always cover the drilling tool bit, and the flying dust in the drilling process of the drilling tool bit can be prevented from splashing to the staff.

[0015] The utility model discloses a cooling liquid supply system is inputted into the water pipe two in the cooling liquid, and then is inputted into two conveying pipe one in the water pipe two respectively by water pipe two, and the cooling liquid is sprayed to the drill bit through the spray head, and the cooling liquid can flow out through the leakage hole on the baffle two continuously in the drilling process, and the cooling liquid is avoided to accumulate too much. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the main body structure schematic drawing of the utility model;

[0017] Figure 2 It is the drilling frame related structure schematic drawing of the utility model;

[0018] Figure 3 It is the distance adjusting assembly, cooling assembly related structure front view of the utility model;

[0019] Figure 4 It is the anti -chip component related structure side view of the utility model.

[0020] REFERENCE NUMERALS

[0021] 1, three axle frame;2, loading platform;3, loading frame;4, drilling frame;5, drill axle;6, drill bit;7, driven wheel;8, driving wheel;9, belt;10, drive motor one;11, distance adjusting assembly;111, sliding slot;112, double thread screw;113, adjusting sliding base;114, drive motor two;12, position adjusting assembly;121, fixed seat;122, hydraulic rod;123, mounting seat;13, anti -chip component;131, baffle one;132, baffle two;133, leakage hole;134, telescopic link;135, spring;14, cooling assembly;141, conveying pipe one;142, spray head;143, water pipe two. DETAILED DESCRIPTION

[0022] In order to make the technical problem, technical scheme and advantage of the utility model clearer, the following will be described in detail in conjunction with the drawings and specific embodiment.

[0023] As the drawings Figure 1 To the drawings Figure 4The embodiment of the utility model provides a kind of preparation device of fatigue crack propagation sample, including three-axis frame 1, loading platform 2 and loading rack 3 are provided on three-axis frame 1, the bottom of loading rack 3 is provided with drilling rack 4, symmetric drilling shaft 5 is provided on drilling rack 4, the bottom end of each drilling shaft 5 is equipped with drilling cutter head 6, the top end of each drilling shaft 5 is fixedly installed with driven wheel 7, the upper of drilling rack 4 is also provided with driving wheel 8, two drilling shafts 5 and driving wheel 8 are equipped with belt 9, one end of the rotation shaft of driving wheel 8 is fixedly connected with driving motor one 10, distance adjusting assembly 11 that can adjust the distance between two drilling shafts 5 is provided on drilling rack 4, position adjusting assembly 12 that can adjust the position of driving wheel 8 so that belt 9 keeps taut is also provided on drilling rack 4.

[0024] Among them, three-axis frame 1 is prior art, can drive loading platform 2 and loading rack 3 move in xyz three-axis direction.

[0025] Specifically, driving motor one 10 drives driving wheel 8 to rotate, driving wheel 8 can drive two driven wheels 7 to rotate synchronously by belt 9, then three-axis frame 1 drives drilling rack 4 to vertically descend, so that drilling cutter head 6 at the bottom end of drilling shaft 5 can drill and tap double holes synchronously on sample.

[0026] Preferably, driving wheel 8 is located at the middle of two driven wheels 7, and the diameter of driving wheel 8 is greater than that of driven wheel 7.

[0027] Preferably, distance adjusting assembly 11 includes sliding groove 111 opened on drilling rack 4, double-threaded screw 112 is rotatably connected in sliding groove 111, symmetric adjusting sliding seat 113 is threadedly installed on double-threaded screw 112, adjusting sliding seat 113 can slide linearly along sliding groove 111, and drilling shaft 5 is rotatably connected on adjusting sliding seat 113, driving motor two 114 is fixedly installed on one side of drilling rack 4, the output end of driving motor two 114 is fixedly connected with one end of double-threaded screw 112, and two drilling shafts 5 are rotatably connected on two adjusting sliding seats 113 respectively.

[0028] Preferably, position adjusting assembly 12 includes fixed seat 121 fixedly installed on drilling rack 4, hydraulic rod 122 is installed on fixed seat 121, mounting seat 123 is fixedly connected with the telescopic end of hydraulic rod 122, and driving motor one 10 is fixedly installed on mounting seat 123.

[0029] Specifically, for the sample requiring different hole spacing, the two adjusting slides 113 are moved towards or away from each other by driving the double-threaded screw 112 to rotate driven by the motor 114, so as to drive the drill bit 6 on the drill shaft 5 to automatically adjust the spacing, and at the same time, the mounting seat 123 drives the motor 10 to move by the extension and contraction of the hydraulic rod 122, wherein when the two drill shafts 5 move towards each other, the hydraulic rod 122 is contracted, and vice versa, the hydraulic rod 122 is elongated, so as to ensure that the belt 9 is properly taut, so that the driving wheel 8 can drive the driven wheel 7 to rotate.

[0030] Further, the anti-dust assembly 13 capable of shielding the flying dust is arranged on each adjusting slide 113, the anti-dust assembly 13 comprises a baffle one 131 fixedly installed on the bottom surface of the adjusting slide 113, a baffle two 132 movably inserted on the baffle one 131, a plurality of leakage holes 133 uniformly arranged on the baffle two 132, an extension rod 134 arranged on the outer side of the baffle one 131 and the baffle two 132, a spring 135 sleeved on the outer surface of the extension rod 134, and the upper and lower ends of the extension rod 134 and the spring 135 are fixedly connected with the top of the baffle one 131 and the bottom of the baffle two 132 respectively.

[0031] Preferably, the baffle one 131 and the baffle two 132 are circular ring structures, and the drill bit 6 is located on the axial line of the baffle one 131 and the baffle two 132.

[0032] Specifically, during the drilling process of the drill bit 6 descending, the baffle two 132 is pressed on the surface of the sample and gradually shrinks into the baffle one 131, so as to ensure that the baffle one 131 and the baffle two 132 always cover the drill bit 6, preventing the drill bit 6 from splashing the waste during the drilling process, which causes the injury of the worker, and vice versa, during the process of the drill bit 6 ascending from the sample, the extension rod 134 is elongated by the elastic force of the spring 135, so as to drive the baffle one 131 and the baffle two 132 to restore to the original state.

[0033] Further, the cooling assembly 14 is arranged on the distance adjusting assembly 11, the cooling assembly 14 comprises two delivery pipes one 141 fixedly installed on the adjusting slide 113, the two delivery pipes one 141 are respectively penetrated through the two adjusting slides 113, the bottom end of each delivery pipe one 141 is fixedly communicated with a spray head 142, the spray head 142 is located in the middle of the baffle one 131 and the baffle two 132, and a water delivery pipe two 143 is fixedly communicated between the two delivery pipes one 141, and the water inlet of the water delivery pipe two 143 is connected with a cooling liquid supply system.

[0034] Specifically, the cooling liquid is input into the water delivery pipe two 143 through the cooling liquid supply system, and then is input into the two delivery pipes one 141 through the water delivery pipe two 143 respectively, and is sprayed towards the drilling cutter 6 through the spray head 142, and in the drilling process, the cooling liquid can continuously flow out through the leakage hole 133 on the baffle two 132, so as to avoid excessive accumulation of the cooling liquid.

[0035] The working process of the utility model is as follows:

[0036] In use, the centering fixture is installed on the loading table 2, and the test sample is clamped and fixed, according to the required double-hole spacing of the fixture, the double-threaded screw rod 112 is driven to rotate by the driving motor two 114, so that the two adjusting sliding seats 113 move towards or away from each other, thereby driving the drilling cutter 6 on the drill shaft 5 to automatically adjust the spacing, at the same time, the hydraulic rod 122 is retracted and extended to ensure that the belt 9 is kept appropriately taut, then the driving motor one 10 is driven to rotate the driving wheel 8, the driving wheel 8 can drive the two driven wheels 7 to rotate synchronously by the belt 9, and then the drilling frame 4 is driven to vertically descend by the three-axis rack 1, so that the drilling cutter 6 at the bottom end of the drill shaft 5 can perform double-hole synchronous drilling on the test sample, and in the drilling process, the baffle two 132 is pressed on the surface of the test sample and gradually shrinks into the baffle one 131, so as to ensure that the baffle one 131 and the baffle two 132 always cover the drilling cutter 6 to prevent debris from splashing, at the same time, the cooling liquid is sprayed towards the drilling cutter 6 through the spray head 142 by the cooling liquid supply system, until the drilling process is completed.

[0037] Finally, it should be pointed out that: first, in the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0038] Secondly: the utility model discloses the embodiment in the drawing, only relates to the structure involved in the embodiment of the present disclosure, other structures can refer to the usual design, in the case of no conflict, the same embodiment and different embodiments of the utility model can be combined with each other.

[0039] Finally: the above only for preferred embodiment of the utility model has, and does not limit the utility model, any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An apparatus for preparing fatigue crack propagation specimens, comprising a triaxial frame (1), wherein a loading platform (2) and a loading rack (3) are provided on the triaxial frame (1), characterized in that, The loading frame (3) is provided with a drilling frame (4) at the bottom. The drilling frame (4) is provided with symmetrical drill shafts (5). Each drill shaft (5) is equipped with a drill bit (6) at the bottom end. Each drill shaft (5) is fixedly equipped with a driven wheel (7) at the top end. The drilling frame (4) is also provided with a drive wheel (8) above it. A belt (9) is fitted on the two drill shafts (5) and the drive wheel (8). One end of the drive wheel (8) is fixedly connected to a drive motor (10). The drilling frame (4) is provided with a distance adjustment component (11) that can adjust the distance between the two drill shafts (5). The drilling frame (4) is also provided with a position adjustment component (12) that can adjust the position of the drive wheel (8) to keep the belt (9) taut.

2. The apparatus for preparing fatigue crack propagation specimens according to claim 1, characterized in that, The driving wheel (8) is located in the middle of the two driven wheels (7), and the diameter of the driving wheel (8) is larger than the diameter of the driven wheel (7).

3. The apparatus for preparing fatigue crack propagation specimens according to claim 1, characterized in that, The adjusting assembly (11) includes a groove (111) opened on the drilling frame (4). A double-threaded screw (112) is rotatably connected in the groove (111). Symmetrical adjusting slides (113) are threaded on the double-threaded screw (112). The adjusting slides (113) can slide linearly along the groove (111). The drill shaft (5) is rotatably connected to the adjusting slides (113). A second drive motor (114) is fixedly installed on one side of the drilling frame (4). The output end of the second drive motor (114) is fixedly connected to one end of the double-threaded screw (112). The two drill shafts (5) are rotatably connected to the two adjusting slides (113) respectively.

4. The apparatus for preparing fatigue crack propagation specimens according to claim 1, characterized in that, The position adjustment assembly (12) includes a fixed seat (121) fixedly installed on the drilling frame (4), a hydraulic rod (122) is installed on the fixed seat (121), the telescopic end of the hydraulic rod (122) is fixedly connected to a mounting seat (123), and the drive motor (10) is fixedly installed on the mounting seat (123).

5. The apparatus for preparing fatigue crack propagation specimens according to claim 3, characterized in that, Each of the aforementioned adjusting slides (113) is provided with a chip-proof component (13) capable of blocking flying chips. The chip-proof component (13) includes a baffle (131) fixedly installed on the bottom surface of the adjusting slide (113). A baffle (132) is movably inserted into the baffle (131). A plurality of drainage holes (133) are evenly opened on the baffle (132). A telescopic rod (134) is provided on the outer side of the baffle (131) and the baffle (132). A spring (135) is sleeved on the outer surface of the telescopic rod (134). The upper and lower ends of the telescopic rod (134) are fixedly connected to the top of the baffle (131) and the bottom of the baffle (132) respectively. Similarly, the upper and lower ends of the spring (135) are fixedly connected to the top of the baffle (131) and the bottom of the baffle (132) respectively.

6. The apparatus for preparing fatigue crack propagation specimens according to claim 5, characterized in that, The first baffle (131) and the second baffle (132) are circular ring structures, and the drilling head (6) is located on the axis of the first baffle (131) and the second baffle (132).

7. The apparatus for preparing fatigue crack propagation specimens according to claim 5, characterized in that, The adjusting assembly (11) is provided with a cooling assembly (14). The cooling assembly (14) includes two conveying pipes (141) fixedly installed on the adjusting slide (113). The two conveying pipes (141) respectively pass through the two adjusting slides (113). The bottom ends of the two conveying pipes (141) are fixedly connected to nozzles (142). The nozzles (142) are located in the middle of the baffle (131) and the baffle (132). The two conveying pipes (141) are fixedly connected to a water supply pipe (143). The inlet of the water supply pipe (143) is connected to the coolant supply system.

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