Stretching test pipe fitting line drawing tool
By designing a marking fixture for tensile test pipe fittings, the problems of rolling and skewing of copper pipe fittings during tensile tests were solved, achieving stable positioning and efficient marking, thus improving the accuracy and efficiency of experimental results.
Patent Information
- Application Number
- CN202423292956.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In existing tensile tests, copper pipe fittings are prone to rolling and tilting when drawing lines, which affects the experimental results and makes measurement and line drawing inconvenient.
Design a tensile testing tube marking fixture, including a base plate, a sample placement groove, a slider, and a marking groove. The slider is pressed against the copper tube, and the fixture is stabilized by a pre-tension spring and a guide rod. Combined with a telescopic positioning ball and a sloped marking groove, accurate positioning and marking are achieved.
It achieves stable positioning of copper pipe fittings, avoids rolling and skewing, improves the quality and efficiency of line drawing, and simplifies the operation process.
Smart Images
Figure CN223573162U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of tooling for drawing line on pipe sample for tensile test. BACKGROUND
[0002] Copper pipe is generally tested by tensile test. Before the test, two lines are drawn on the pipe along the axial direction at a predetermined interval with a marker. The ductility is determined by the change of the interval between the two lines after the tensile test.
[0003] The existing operation mode is to draw lines manually after measuring with a ruler. Since the pipe is easy to roll, it is very inconvenient to fix the pipe and the ruler with fingers of one hand and draw lines with the other hand when drawing lines. Moreover, it is easy to skew the lines on the curved surface of the pipe, which affects the subsequent test results. SUMMARY
[0004] Therefore, the utility model provides a tensile test pipe drawing tool, which is convenient for drawing marking lines on sample pipe for test.
[0005] To solve the above technical problems, the utility model provides a tensile test pipe drawing tool, which comprises a base plate, a sample placing groove is formed in the base plate, a sliding block that can move along the sample placing groove is arranged in the sample placing groove, a pre-tightening spring is arranged on the sliding block, so that the copper pipe can be tightly pressed by the sliding block when the copper pipe is installed in the sample placing groove, two line drawing grooves are formed in the side wall of the sample placing groove, the line drawing grooves are perpendicular to the sample placing groove and reach the side wall of the sample placing groove, and the interval between the two line drawing grooves is predetermined.
[0006] As an improvement, a guide rod is arranged at the rear end of the sliding block, the pre-tightening spring is sleeved on the guide rod, and the two ends of the pre-tightening spring abut against the sliding block and the end portion of the sample placing groove, respectively.
[0007] As a further improvement, a retractable positioning ball is arranged on the side wall of the sample placing groove that is not connected to the line drawing groove.
[0008] As another further improvement, a mounting hole is formed in the side wall of the sample placing groove, the positioning ball is arranged in the mounting hole, and a spring is arranged behind the positioning ball.
[0009] As an improvement, the three positioning balls are arranged along the axial direction of the sample placing groove.
[0010] As an improvement, when the copper pipe is installed in the sample placing groove, the center of the positioning ball is higher than the axial center of the copper pipe.
[0011] As an improvement, the width of the line drawing groove is consistent with the width of the lead of the marker.
[0012] As an improvement, the bottom of the line drawing groove is a slope, and the lowest point of the slope is close to the end of the sample placing groove.
[0013] As an improvement, a rubber pad is arranged on the end face of the sliding block in contact with the copper pipe.
[0014] The utility model discious the following beneficial effects:
[0015] The line drawing tool for the tensile test pipe has the advantages that the copper pipe is positioned through the sample placing groove and the sliding block, and then line drawing is performed from the line drawing groove. The positioned copper pipe does not roll, making line drawing more convenient and improving the quality of line drawing. The distance between the line drawing grooves is preset, and there is no need to measure with a ruler, improving the efficiency of line drawing. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The utility model discious the following beneficial effects:
[0017] Figure 2 The utility model discious the following beneficial effects:
[0018] Marked in the drawing: 1 bottom plate, 2 sample placing groove, 3 sliding block, 4 guide rod, 5 pre-tightening spring, 6 positioning ball, 7 spring, 8 line drawing groove, 100 copper pipe. DETAILED DESCRIPTION
[0019] In order to make the technical personnel of the prior art better understand the technical scheme of the utility model, the utility model is further explained in detail below in combination with specific implementation manners.
[0020] As Figure 1 shown, the utility model provides a line drawing tool for tensile test pipe, including bottom plate 1, the bottom plate 1 is set with sample placing groove 2, the sample placing groove 2 is provided with the sliding block 3 that can move along sample placing groove 2 in, still including the pre-tightening spring 5 of acting on the sliding block 3, so that when copper pipe 100 is installed in sample placing groove 2, copper pipe 100 can be tightly pressed through sliding block 3, the sample placing groove 2 side is opened with two line drawing grooves 8, the line drawing groove 8 is perpendicular to sample placing 2 groove and reaches sample placing groove 2 side wall, and the distance between two line drawing grooves 8 is preset.
[0021] The principle of the utility model lies in that the copper pipe 100 is positioned through the sample placing groove 2 and the sliding block 3, and then line drawing is performed from the line drawing groove 8. The positioned copper pipe 100 does not roll, making line drawing more convenient and improving the quality of line drawing. The distance between the line drawing grooves 8 is preset, and there is no need to measure with a ruler, improving the efficiency of line drawing.
[0022] Specifically, a guide rod 4 is provided at the rear end of the slider 3, and the preload spring 5 is sleeved on the guide rod 4, with its two ends abutting against the ends of the slider 3 and the sample placement groove 2, respectively. The guide rod 4 can prevent the slider 2 from deviating, thereby preventing the copper tube 100 from tilting. In addition, in some embodiments, a rubber pad is provided on the end face of the slider 3 that contacts the copper tube 100, which can further prevent slippage between the slider and the copper tube.
[0023] There are many types of pipe fittings, and different types of pipe fittings have different diameters. In order to accommodate various types of pipe fittings, the sample placement groove 2 described in this utility model is provided with a retractable positioning ball 6 on the side wall that is not connected to the marking groove. The positioning ball 6 pushes the copper pipe fitting 100 toward the side closer to the marking groove 8, so that copper pipe fittings 100 of various diameters can be marked.
[0024] In this embodiment, the sample placement groove 2 has mounting holes on its sidewall, and the positioning balls 6 are disposed within the mounting holes, with a spring 7 positioned behind them. Three positioning balls 6 are arranged axially along the sample placement groove 2 to position the copper tube along its entire axial direction, preventing uneven force distribution. Furthermore, when the copper tube 100 is installed in the sample placement groove 2, the center of each positioning ball 6 is higher than the axis of the copper tube 100. This allows the positioning balls 6 to apply a downward pressure to the copper tube 100, preventing it from tilting.
[0025] The width of the drawing groove 8 in this invention is the same as the width of the marker pen refill, which limits the refill and prevents the lines from being crooked. In addition, the bottom of the drawing groove 8 is a slope, with the end closest to the sample placement groove 2 being the lowest point. In this way, when the marker pen draws a line from the high point to the low point of the drawing groove 8, it will naturally leave a line on the copper tube 100.
[0026] When using, such as Figure 2 As shown, the copper tube 100 to be marked is installed in the sample placement groove 2, its end is fixed by the slider 3, and it is pushed against one side of the marking groove 8 by the positioning ball 6. Then, two lines are drawn on the copper tube 100 through the marking groove 8 using a marker.
[0027] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.
Claims
1. A tensile test tube line marking tool characterized by: The utility model discloses a copper pipe installation device, including the bottom plate, sample placement slot is seted up on the bottom plate, the slider is seted up in the sample placement slot, the pre-tightening spring is seted up on the slider, the copper pipe is installed in the sample placement slot, and the copper pipe is pressed to the tight through the slider.
2. The tensile test tube line marking tool of claim 1, wherein: The rear end of the slider is provided with a guide rod, and the pre-tightening spring is sleeved on the guide rod and abuts against the slider and the end of the sample placement slot at two ends.
3. The tensile test tube line marking tool of claim 1, wherein: The side wall of the sample placement slot not connected with the drawing line groove is provided with a retractable positioning ball.
4. The tensile test tube line marking tool of claim 3, wherein: The side wall of the sample placement slot is provided with a mounting hole, and the positioning ball is arranged in the mounting hole and provided with a spring at the back.
5. The tensile test tube line marking tool of claim 3, wherein: The positioning ball is three and arranged axially along the sample placement slot.
6. The tensile test tube line marking tool of claim 3, wherein: When the copper pipe is installed in the sample placement slot, the center of the positioning ball is higher than the axis of the copper pipe.
7. The tensile test tube line marking tool of claim 1, wherein: The width of the drawing line groove is consistent with the width of the lead of the marker.
8. The tensile test tube line marking tool of claim 1, wherein: The bottom of the drawing line groove is a slope, and the end close to the sample placement slot is the lowest point.
9. The tensile test tube line marking tool of claim 1, wherein: The end face of the slider in contact with the copper pipe is coated with a rubber pad.