CN2583660Y - Device for detecting laser welding diamond tool welding seam strength - Google Patents

Abstract

The utility model discloses a device for detecting the welding seam strength of a laser welding diamond tool. The device includes a collet and an elastic rod, and is characterized in that: the collet includes an upper and a lower collet movably connected by a connecting rod, a hole with a step is opened on the collet, and a spring for adjusting the caliber of the collet is installed in the hole and adjusting screw; one end of the elastic rod is fixed on the lower chuck, the other end is equipped with a handle, the dial indicator is fixed on the elastic rod through the support, and its telescopic rod contacts the chuck. The utility model is characterized by small size and light structure, and can be used for testing the welding strength of saw blade heads of different types, thicknesses and sizes. Easy to use and cheap.

Description

A device for detecting the weld strength of laser welding diamond tools

technical field

The utility model relates to a detection device, in particular to a device for detecting the weld seam strength of a laser welding diamond tool.

Background technique

Diamond tools are being used more and more widely. For safety reasons, testing standards for the weld strength of diamond tools have been formulated internationally. What tool to use to test its strength is a problem that every diamond tool manufacturer must consider. At present, there is a lack of devices on the market that can conveniently and quickly detect the weld strength of laser-welded diamond tools.

Contents of the invention

The purpose of this utility model is to provide a device for detecting the weld seam strength of laser welding diamond tools that can meet the above requirements. The device is simple in structure, easy to operate, and can quickly detect the weld seam strength of laser welding diamond tools.

In order to achieve the purpose of the above utility model, a device for detecting the weld strength of laser welding diamond tools includes a chuck and an elastic rod, and is characterized in that: the chuck includes upper and lower chucks movably connected by connecting rods, and the chuck There is a hole with a step on the top, and a spring and an adjusting screw for adjusting the caliber of the collet are installed in the hole; one end of the elastic rod is fixed on the lower collet, and the other end is equipped with a handle, and the dial indicator is fixed on the elastic rod through the support. Its telescopic rod is in contact with the collet.

The utility model is characterized by small size and light structure, and can be used for testing the welding strength of saw blade heads of different types, thicknesses and sizes. Easy to use and cheap.

Description of drawings

Fig. 1 is the structural representation of the utility model device;

Fig. 2 is a schematic diagram of deformation of the elastic rod in Fig. 1;

Fig. 3 is a schematic diagram of the use of the device of the present invention.

Detailed ways

The inventor of this detection device calls it a torque wrench, also known as a torque clamp, which is actually a torque structure. Its structure is shown in Figure 1. Upper and lower collets 1, 12, elastic rod 6, dial indicator 3, support 4 etc. are formed. The upper and lower chucks are movably connected by a connecting rod 14, and a " "-shaped hole is opened on the chuck along the vertical direction, and a spring 13 and an adjusting screw 2 are installed in the hole, and the adjusting screw 2 can adjust the caliber of the chuck to suit different thicknesses. head of the knife. One end of the elastic rod 6 is fixed on the chuck, and the other end is equipped with a handle 5 . The dial indicator is fixed on the elastic rod 6 through the support 4 . The function of the support is to fix the dial indicator. After the position of the support on the elastic rod is adjusted, it generally does not need to be moved. The rod transmits the force to the collet, which forces the bit and the weld creates a bending moment. The deflection of the pointer of the dial indicator is proportional to the deformation of the elastic rod, and the deformation of the elastic rod is related to the magnitude of the force, so the magnitude of the force can be measured through the deflection of the pointer of the dial indicator.

The measuring principle of the device is that when measuring the strength of the weld, the elastic rod can be regarded as a cantilever beam, which deflects after receiving the force from the chuck. The whole process is shown in Figure 2. Assuming that the distance between the dial indicator and point A is X, the deflection and rotation angle of this point under the action of F3 are:

The deflection of the rod is: δ=(F ₃ L ₃ X ² /2-F ₃ X ³ /6)/EI (7)

The angle is: θ=(F ₃ L ₃ XF ₃ X ² /3)/EI (8) The maximum deflection and maximum rotation angle of the elastic rod occur at the end, which is:

Maximum deflection: δ _max = (F ₃ ×L ₃ ³ )/2EI

Maximum rotation angle: θ _max = (F ₃ ×L ₃ ² )/2EI

Note: El——bending stiffness of the beam Deformation of the rod ΔL=AB-X

It can be seen from Figure 2 that for a certain X, the larger F3, the larger δ, the larger θ, and the larger AB, the larger ΔL, and the size of F3, that is, the size of M, can be detected by ΔL, so as to detect the resistance of the weld. bending strength. In addition, under the same force F3, the larger X is, the farther the dial indicator is from point A, the larger δ, the larger θ, and the larger AB, that is, the greater the reading of the dial indicator, which also means The greater the magnification of the force. Therefore, for different occasions, the force display multiple can be realized by adjusting the position of the dial gauge.

Determination of the reading of the dial indicator: within the elastic range, the force exerted by the center of the handle of the torque wrench and the reading of the dial indicator change approximately in a linear relationship. Apply a certain force to the center of the handle of the torque wrench so that the readings of the dial indicator are 5, 10, 15, and 20, respectively, and take the mathematical average to calculate the magnitude of the force represented by each small cell of the dial indicator, which is used as a standard.

According to the different specifications of various tools, according to the DSA standard and some formulas of material mechanics, calculate the force that the inspector needs to exert on the handle of the torque wrench when the weld seam of the laser welding tool meets the strength value of the DSA standard; and then according to The force represented by each cell of the dial indicator is used as a standard to determine the reading that should be displayed on the dial indicator during inspection.

The method of use of the above-mentioned device is shown in Figure 3,

1) Set the saw blade 15 on the central axis 9 of the same specification, place it horizontally on the inspection table, and press the cover plate 10;

2) Clamp the chucks 1 and 12 of the torque wrench to the cutter head to be inspected, hold the handle 5 with the right hand, and pull it upward until the dial indicator 3 swings to the specified reading; then pull it downward until the percentage is reached The gauge swings until the specified reading; if the tooth does not fall off, it means that the weld seam of the cutter head meets the DSA standard, and the cutter head is qualified. If the tooth falls off, it means that the weld seam of the cutter head does not meet the DSA standard, and the cutter head is unqualified and must be repaired.

3) Turn the saw blade to the next cutter head, repeat step 2 until all the cutter heads of the entire saw blade are inspected.

4) Check other saw blades according to steps 1~3.

The inspection of other components such as drill bits is also similar to the above method.

Claims (1)

1. a detection laser is welded the device of diamond tool weld strength, comprise chuck and elastic rod, it is characterized in that: described chuck comprises the upper and lower chuck (1,12) that is flexibly connected by connecting link (14), have hole with the level on the chuck, the spring (13) and the set screw (2) that are used for adjustable clamp draught animals footpath are housed in the hole; One end of elastic rod (6) is fixed on the lower chuck, and the other end is equipped with handle (5), and dial gauge (3) is fixed on the elastic rod (6) by bearing (4), and its expansion link (16) contacts with chuck.

Images