Metal dotting machine

Abstract

A metal dotting machine comprises a base, a dotting device, a metal containing groove and guide rods, the metal containing groove is fixed to the base, the left end and the right end of the dotting device are fixed to the base in a liftable mode through the guide rods, and the metal dotting machine is characterized in that a cross beam is arranged at the rear end of the dotting device, a boss assembly is fixed to the cross beam, and a lever assembly is arranged on the rear portion of the base; the lever assembly and the boss assembly are matched to enable the dotting device to move up and down, and by means of the lever principle, the heavy dotting device can stably move up and down under the small arm acting force and obtain large pressure, so that the labor intensity is relieved, use is convenient, and large noise and vibration are not generated.

Description

Technical Field

[0001] The utility model relates to the technical field of dotting of metal material tensile specimens, in particular to a metal dotting machine. Background Art

[0002] Tensile test is an important means to measure the mechanical properties of materials, and can measure a series of strength indicators and plasticity indicators. For example, the data obtained from the tensile test can determine the material's elongation, elastic modulus, elastic limit, tensile strength, yield point, yield strength and other performance indicators. To calculate the material's elongation after fracture, it is necessary to determine the gauge length of the tensile test before the test, which requires the use of a gauge dotting machine for marking. Traditional mechanical dotting machines require manual flipping of the dotting components before and after each dotting. The dotting components are relatively heavy, which requires certain strength from the dotting personnel. In addition, when the dotting components are flipped, they will generate large noise and vibration, which is not conducive to the test personnel's operation.

[0003] Upon investigation, the patent number CN202220429177.3 discloses a continuous steel bar dotting machine: it includes a machine base and a dotting device, a steel bar placement groove and two fixed columns are provided on the upper part of the machine base, and the two ends of the dotting device are respectively inserted into the fixed columns and slidably cooperate with them; the dotting device includes a box body, a rotating shaft and a plurality of dotting columns, the rotating shaft is arranged inside the box body and rotates with the box body, a spiral plate is fixedly provided on the rotating shaft, a row of evenly distributed column holes are respectively provided on the upper and lower parts of the box body near the front, a row of vertical grid holes are evenly provided on the front part of the box body, and the column holes correspond one by one to the vertical grid holes; the dotting columns and the column holes slide up and down, a limit plate is fixedly provided in the middle of the dotting columns, the support plate at the lower part of the box body supports and limits the limit plate, the outer end of the limit plate slides with the vertical grid hole, and a roller is provided at the inner end, and a tension spring is provided on the upper part of the dotting column, and the tension spring elastically cooperates with the limit plate and the upper plate of the box body respectively. A supporting spring is provided at the bottom of the fixed column and a limiting hand wheel is provided at the top. However, it is very laborious for the user to press the pressing plate, which is inconvenient to use for a long time, increases the physical exertion of the workers, and causes large noise and vibration. Summary of the invention

[0004] The utility model mainly proposes a metal dotting machine to solve the problems in the prior art, which can increase pressure, is convenient to use and reduces labor intensity.

[0005] The technical solution of the utility model is: a metal dotting machine, including a base, a dotting device, a metal placement groove, and a guide rod, including a metal placement groove fixed on the base, and the left and right ends of the dotting device are fixed on the base in a liftable manner through the guide rod. It is characterized in that a crossbeam is provided at the rear end of the dotting device, a boss assembly is fixed on the crossbeam, and a lever assembly is provided at the rear of the base, and the lever assembly cooperates with the boss assembly to enable the dotting device to move up and down.

[0006] Further improvement: A rotatable shaft is provided in the middle of the dotting device, a rotating handle is fixed to one end of the shaft, and a wave sheet is provided on the outer wall of the shaft to match the cross rod in the dotting device.

[0007] Further improvement: the guide rods are symmetrically distributed at both ends of the dotting device, and guide springs are sleeved on the outer walls of the guide rods to achieve the function of pressing and rebounding.

[0008] Further improvement: the lever assembly includes a column, the top of the column is rotatably riveted to fix a pressing handle, and the middle part of the pressing handle cooperates with the boss assembly to realize the up and down movement of the dotting device.

[0009] As a further improvement, the boss assembly includes a boss, and a top of the boss is provided with an arc groove that matches the pressing handle.

[0010] Finally: the lever assembly is arranged longitudinally front to back and is located on the center line of the dotting device.

[0011] Compared with the prior art, the advantages of this product are: by adding a lever assembly and using the lever principle, the heavy dotting device can be moved up and down smoothly under a small arm force and obtain a larger pressure, thereby reducing labor intensity and facilitating use, and also does not generate large noise and vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional schematic diagram of the utility model.

[0013] Figure 2 It is a front view of the utility model.

[0014] Figure 3 It is a top view of the utility model.

[0015] Figure 4 It is a structural diagram of the main body of the dotting device.

[0016] Figure 5 It is a schematic diagram of the structure of the rotating shaft and the rotating handle.

[0017] Figure 6 is a three-dimensional schematic diagram of a cross bar.

[0018] In the figure, 1, base, 2, dotting device, 3, metal placement groove, 4, guide rod, 5, beam, 6, boss assembly, 7, lever assembly, 8, rotating shaft, 9, rotating handle, 10, wave sheet, 11, cross rod, 12, guide spring, 13, column, 14, pressing handle, 15, boss, 16, arc groove, 17, spring. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the implementation methods of the utility model patent in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the utility model patent, but cannot be used to limit the scope of the utility model patent. In the description of the utility model patent, unless otherwise specified, the meaning of "multiple" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model patent. In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] In the description of this utility model patent, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this utility model patent can be understood according to specific circumstances.

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] according to Figures 1 to 6 A metal dotting machine comprises a base 1, a dotting device 2, a metal placement groove 3, and a guide rod 4. The base 1 is provided with a metal placement groove 3, and the left and right ends of the dotting device 2 are fixed to the base 1 by the guide rod 3 in a liftable manner. The focus of its improvement is that a crossbeam 5 is provided at the rear end of the dotting device 2, and a boss assembly 6 is fixed on the crossbeam 5. A lever assembly 7 is provided at the rear of the base 1, and the lever assembly 7 cooperates with the boss assembly 6 to enable the dotting device 2 to move up and down.

[0023] The metal placement groove 3 can be integrally arranged on the top of the base 1 or fixed separately on the top of the base 1. A rotatable shaft 8 is horizontally provided in the middle of the dotting device 2. A rotating handle 9 is fixed at one end of the shaft 8. The user can drive the shaft 8 to rotate by rotating the handle 9. A wave sheet 10 is provided on the outer wall of the shaft 8 to match the cross rod 11 in the dotting device. By adjusting the rotation of the shaft 8, the wave sheet 10 will be adjusted to the specified position, which will drive the cross rod 11 to move upward. When the wave sheet 10 is rotated to a certain position, it will break contact with the cross rod 11. The cross rod 11 moves downward rapidly under the action of the spring 17, stops moving when it contacts the sample below, and leaves an indentation on the sample.

[0024] The two guide rods 4 are symmetrically distributed at both ends of the dotting device 2, and a guide spring 12 is sleeved on the outer wall of the guide rod 4, supported between the base 1 and the dotting device 2, to realize the function of pressing and rebounding. When the user presses the dotting device 2, the dotting device 2 will move up and down along the direction of the guide rod 4, so as to facilitate the user to continue to use it.

[0025] The lever assembly 7 includes a column 13, the top of which is rotatably riveted to fix a pressing handle 14, and the middle of the pressing handle 14 cooperates with the boss assembly 6 to realize the up and down movement of the dotting device 2. The boss assembly 6 includes a boss 15, and the top of the boss 15 is provided with an arc groove 16, which matches the pressing handle 1. Usually, the lever assembly 7 is arranged longitudinally from front to back and is located on the center line of the dotting device 2 for easy operation.

[0026] The operation method of the dotting machine is as follows:

[0027] Step 1, placing the sample to be dotted and stretched in the groove of the metal placement groove 3;

[0028] Step 2: Hold the pressing handle 14 with one hand and apply downward force to the pressing handle 14 until the needle at the bottom of the cross rod 11 contacts the sample surface;

[0029] Step 3: Hold the rotating handle 9 with the other hand and apply a rotating force to it to drive the rotating shaft 8 to move, so that the wave plate 10 will contact the protrusion on the side of the cross rod 11 when it rotates to the specified position, driving the cross rod 11 to move upward. When the wave plate 10 continues to rotate to a certain position, it will break the contact with the cross rod 11, and the needle at the bottom of the cross rod 11 will move downward quickly under the action of the elastic force of the spring 17 to mark the sample;

[0030] Step 4: After the needle tip of the cross rod 11 contacts the sample below, it stops moving and leaves an indentation on the sample;

[0031] Step 5: Release the pressing handle 14, and the dotting device 2 will return to the state before pressing under the action of the guide spring 12;

[0032] Step six, remove the dotted sample from the groove of the metal placement slot 3 for subsequent tensile testing.

[0033] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A metal dotting machine, comprising a base, a dotting device, a metal placement slot, and a guide rod, wherein the base is provided with a metal placement slot, and the left and right ends of the dotting device are fixed on the base in a liftable manner through the guide rod, characterized in that: A crossbeam is arranged at the rear end of the dotting device, a boss assembly is fixed on the crossbeam, a lever assembly is arranged at the rear of the base, and the lever assembly cooperates with the boss assembly to enable the dotting device to move up and down.

2. A metal dotting machine according to claim 1, characterized in that A rotatable shaft is arranged in the middle of the dotting device, a rotating handle is fixed at one end of the shaft, and a wave sheet is arranged on the outer wall of the shaft to match the cross rod in the dotting device.

3. A metal dotting machine according to claim 1, characterized in that The guide rods are symmetrically distributed at the two ends of the dotting device, and guide springs are sleeved on the outer walls of the guide rods to achieve the function of pressing and rebounding.

4. A metal dotting machine according to claim 1, characterized in that The lever assembly comprises a column, the top of which is rotatably riveted to fix a pressing handle, and the middle of the pressing handle cooperates with the boss assembly to realize the up and down movement of the dotting device.

5. A metal dotting machine according to claim 4, characterized in that The boss assembly comprises a boss, and an arc groove is arranged on the top of the boss to match the pressing handle.

6. A metal dotting machine according to claim 5, characterized in that The lever assembly is arranged longitudinally front to back and is located on the center line of the dotting device.

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