Anti-bonding pressure plate of upsetting testing machine

Abstract

An anti-bonding pressure plate of an upsetting testing machine comprises an upper pressure plate, a concave cavity is formed in the upper end face of the upper pressure plate, a concave hole is formed in the center of the bottom face of the concave cavity, a through hole is formed in the center of the bottom face of the concave hole, the through hole downwards penetrates through the lower end face of the upper pressure plate, an ejector pin is arranged in the through hole, and the lower end of the ejector pin extends to the position below the lower end face of the upper pressure plate. The upper side of the ejector pin is coaxially connected with a limiting block, the limiting block is located in the concave hole, a fixing block is arranged in the concave cavity and fixedly connected with the upper pressing disc through a counter bore, a first threaded hole and a screw, a second threaded hole is formed in the center of the upper end face of the fixing block, and a pressure adjusting screw is arranged in the second threaded hole. A groove is formed in the upper end face of the limiting block, and a spring is arranged in the groove. And after the upsetting force is unloaded, along with the separation of the upper pressure plate and the lower pressure plate, the spring resets to eject the ejector pin downwards from the upper pressure plate, and the sample is ejected down from the lower end surface of the upper pressure plate, so that the sample is prevented from being adhered to the lower end surface of the upper pressure plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical field especially, relates to top forging test technology, and particularly is a kind of anti-bonding pressure disc of top forging testing machine. BACKGROUND

[0002] The pressure disc of top forging testing machine is in heat top forging, because sample is deformed rapidly after being subjected to top forging force under high temperature, the situation that sample is often bonded on the downside of upper pressure disc is often appeared, it brings trouble for subsequent sampling, especially for full-automatic top forging testing machine, the position of sample after top forging cannot be determined. SUMMARY

[0003] The utility model discloses a kind of anti-bonding pressure disc of top forging testing machine, the anti-bonding pressure disc of top forging testing machine to solve the technical problem that sample is bonded on the downside of upper pressure disc in prior art.

[0004] The utility model discloses a kind of anti-bonding pressure disc of top forging testing machine, including upper pressure disc, recessed cavity is set in upper pressure disc upper end face, the bottom surface center of recessed cavity is provided with recess, the diameter of recess is less than the diameter of recessed cavity, the bottom surface center of recess is provided with through hole, the diameter of through hole is less than the diameter of recess, through hole is downwardly penetrated to the lower end surface of upper pressure disc, recessed needle is set in through hole, the lower end of recessed needle extends to below the lower end surface of upper pressure disc, recessed needle upper side is coaxially connected with limit block, the diameter of limit block is greater than the diameter of recessed needle, limit block is located in recess, fixed block is set in recessed cavity, at least two counterbores are set in the upper end face of fixed block along the circumferential direction, the bottom surface of recessed cavity is provided with first threaded hole corresponding with counterbores, fixed block is fixedly connected with upper pressure disc by counterbores, first threaded hole and screw, the second threaded hole is set in the upper end surface center of fixed block, pressure adjusting screw is set in second threaded hole, recess is set in the upper end surface of limit block, pressure adjusting screw extends to the recess, spring is set in recess, the spring is sleeved on pressure adjusting screw, the lower end of spring is connected with the bottom surface of recess, the upper end of spring is connected with the lower end surface of the head of pressure adjusting screw, spring is downwardly biased to recessed needle by limit block, gap is set between limit block and fixed block, the axial length of the gap is equal to the length of recessed needle below the lower end surface of upper pressure disc.

[0005] Further, the pressure adjusting screw is a fine thread screw.

[0006] Further, the upper pressure disc is provided with at least two upper and lower penetrating mounting holes in the circumferential direction outside the recessed cavity.

[0007] Further, the upper end surface center of the fixed block is provided with a positioning hole.

[0008] The utility model discloses compared with prior art, its effect is positive and obvious. When top forging test, upper pressure disc is contacted with sample under the pressure of top forging, and the top pin is retracted to the upper pressure disc up under the extrusion of sample, spring compression, after top forging is completed, top forging force unloads, along with the separation of upper pressure disc and lower pressure disc, spring reset top pin from upper pressure disc and push out downwards, and sample is pushed down from the lower end surface of upper pressure disc, thereby preventing sample from sticking on the lower end surface of upper pressure disc, and preparing for next step work. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 It is a sectional view schematic diagram of the anti-sticking pressure disc of the top forging testing machine of the utility model.

[0010] Fig. 2 It is a top view schematic diagram of the anti-sticking pressure disc of the top forging testing machine of the utility model.

[0011] Fig. 3 It is a three-dimensional schematic diagram of the anti-sticking pressure disc of the top forging testing machine of the utility model. DETAILED DESCRIPTION

[0012] The utility model is further described below in combination with embodiments, but the utility model is not limited to the embodiment, and all the similar changes of the utility model should be included in the protection scope of the utility model, for the convenience of clear description, the use of the direction such as upper, lower, front, back, left, right, middle, inner and outer in the utility model is not the limitation of the technical scheme of the utility model.

[0013] For example, Figs. 1-3The utility model discloses a kind of anti-adhesion pressure discs of top forging testing machine shown, including upper pressure disc 1, recessed cavity 2 is set in upper pressure disc 1 upper end face, the bottom surface center of recessed cavity 2 is provided with recess 3, the diameter of recess 3 is less than the diameter of recessed cavity 2, the bottom surface center of recess 3 is provided with through hole 4, the diameter of through hole 4 is less than the diameter of recess 3, through hole 4 is downwardly penetrated to the lower end surface of upper pressure disc 1, through hole 4 is provided with ejector pin 5, the lower end of ejector pin 5 extends to the lower end surface of upper pressure disc 1 below, ejector pin 5 upper side is coaxially connected with limit block 6, the diameter of limit block 6 is greater than the diameter of ejector pin 5, limit block 6 is located in recess 3, recessed cavity 2 is provided with fixed block 8, at least two counterbores are set in the upper end face of fixed block 8 along the circumferential direction, the bottom surface of recessed cavity 2 is provided with first threaded hole corresponding with counterbores, fixed block 8 is fixedly connected with upper pressure disc 1 by counterbores, first threaded hole and screw 9, the upper end face center of fixed block 8 is provided with second threaded hole 10, pressure adjusting screw 11 is set in second threaded hole 10, recess is set in the upper end face of limit block 6, pressure adjusting screw 11 extends into the recess, spring 7 is set in recess, spring 7 is sleeved on pressure adjusting screw 11, the lower end of spring 7 is connected with the bottom surface of recess, the upper end of spring 7 is connected with the lower end surface of the head of pressure adjusting screw 11, spring 7 is downwardly biased to ejector pin 5 by limit block 6, gap is set between limit block 6 and fixed block 8, the axial length of the gap is equal to the length of ejector pin 5 below the lower end surface of upper pressure disc 1.

[0014] Further, the pressure adjusting screw 11 is a fine thread screw.

[0015] Further, the upper pressure disc 1 is provided with at least two upper and lower penetrating mounting holes 12 along the circumferential direction at the outer periphery of the recessed cavity 2.

[0016] Further, the upper end face center of the fixed block 8 is provided with a positioning hole 13.

[0017] Specifically, the specific structure and principle of the ejector pin 5, fine thread screw and other components in the embodiment, and other unexplained places all adopt the known scheme in the prior art, and those skilled in the art are all aware of it, which will not be repeated here.

[0018] The working principle of the embodiment is as follows:

[0019] When top forging test, upper pressure disc 1 is contacted with sample under the pressure of top forging force, ejector pin 5 is retracted upwardly to upper pressure disc 1 under the extrusion of sample, spring 7 is compressed, after top forging is completed and top forging force is unloaded, with the disengagement of upper pressure disc 1 and lower pressure disc, spring 7 resets to ejector pin 5 from upper pressure disc 1 downwardly, sample is ejected from the lower end surface of upper pressure disc 1, so that sample is prevented from being adhered to the lower end surface of upper pressure disc 1, and preparation is made for next step.

[0020] The gap fit between the upper die disc 1 and the punch 5 allows the punch 5 to slide up and down uniformly and smoothly. The force value of the spring 7 is uniform and fixed when the spring 7 is deformed under force, and the spring 7 is less affected by temperature. The pre-compression amount of the spring 7 can be adjusted by adjusting the pressure adjusting screw 11 up and down, so as to adjust the initial force on the punch 5. When the upset test is performed, the lower end surface of the punch 5 is flush with the lower end surface of the upper die disc 1 after the punch 5 is compressed back into the upper die disc 1, so as to ensure the flatness of the end surface of the test sample after the upset. The upper die disc 1 is provided with a mounting hole 12 for mounting with other components. The connecting plate 5 is provided with a positioning hole 13 for positioning with other components.

Claims

1. A sticking preventing presser plate of a top-impact testing machine, characterized by, The upper pressing disc is provided with a concave cavity in the upper end face, a recess is arranged in the center of the bottom face of the concave cavity, the diameter of the recess is smaller than that of the concave cavity, a through hole is arranged in the center of the bottom face of the recess, the diameter of the through hole is smaller than that of the recess, the through hole penetrates downward to the lower end face of the upper pressing disc, a thimble is arranged in the through hole, the lower end of the thimble extends below the lower end face of the upper pressing disc, a limit block is coaxially connected to the upper side of the thimble, the diameter of the limit block is larger than that of the thimble, the limit block is arranged in the recess, a fixing block is arranged in the concave cavity, at least two counterbores are arranged in the upper end face of the fixing block in the circumferential direction at intervals, a first threaded hole corresponding to the counterbores is arranged in the bottom face of the concave cavity, the fixing block is fixedly connected with the upper pressing disc through the counterbores, the first threaded hole and a screw, a second threaded hole is arranged in the center of the upper end face of the fixing block, a pressure adjusting screw is arranged in the second threaded hole, a recess is arranged in the upper end face of the limit block, the pressure adjusting screw extends downward into the recess, a spring is arranged in the recess, the spring is sleeved on the pressure adjusting screw, the lower end of the spring is connected with the bottom face of the recess, the upper end of the spring is connected with the lower end face of the head of the pressure adjusting screw, the spring biases the thimble downward through the limit block, a gap is arranged between the limit block and the fixing block, the axial length of the gap is equal to the length of the thimble below the lower end face of the upper pressing disc.

2. A stick prevention pressure disc of a top-impact testing machine according to claim 1, wherein The pressure adjusting screw is a fine thread screw.

3. A stick prevention pressure disc of a top-impact testing machine according to claim 1, wherein The upper pressing disc is provided with at least two mounting holes penetrating upward and downward in the circumferential direction outside the concave cavity.

4. A stick prevention pressure disc of a top-impact testing machine according to claim 1, wherein The center of the upper end face of the fixing block is provided with a positioning hole. The center of the upper end face of the fixing block is provided with a positioning hole.

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